Some standard content:
Engineering Construction Standard Full Text Information System
National Standard of the People's Republic of China
GB13329—91
Safety Rules for Construction Winches
Construction winch-SafetyrulesConstruction Standard
Published on December 16, 1991
Implemented on October 1, 1992
Published by the State Administration of Technical Supervision
W Engineering Construction Standard Full Text Information System
National Standard of the People's Republic of China
Safety Rules for Construction Winches
Construction winch-Safety rules1 Subject Content and Scope of Application
This regulation specifies the safety requirements for the design, manufacture, use and maintenance of construction winches. GB13329—91
This regulation applies to construction winches driven by electric motors (hereinafter referred to as winches) used in construction and installation projects. Winches driven by other power sources may also be implemented as a reference. This regulation does not apply to lifting equipment where all or part of the load is personnel. 2 Reference standards
GB1102
Round strand wire rope
GB3811
Crane design specification
GB5972
GB6947
Practical specification for inspection and scrapping of wire ropes for lifting machinery Construction winch test specification and method
GBJ232 Construction and acceptance specification for electrical installation engineering JJ12.3 General technical conditions for welded parts of construction machinery JJ15 General technical conditions for assembly of construction machinery 3 Structure and construction
3.1 Materials
The mechanical properties and chemical composition of the materials used for winch parts shall comply with the provisions of relevant national standards and shall be produced according to the materials specified in the drawings. The materials entering the factory shall be inspected and those that do not meet the requirements shall not be used. 3.2 Connection
3.2.1 Welded connection
The weld must comply with the provisions of JJ12.3. The welds of the main load-bearing components must be quality checked according to the design requirements. 3.2.2 Rivet and bolt connections
3.2.2.1 Rivet and bolt connections should comply with the provisions of GB3811. 3.2.2.2 When high-strength bolts are used for connection, they should be processed according to the design technical requirements and tightened with special tools. 3.3 Controls
3.3.1 Controls used in routine operations should be installed in places that are convenient for the driver to operate. 3.3.2 When setting controls, consider keeping the driver's operating position as far away as possible from the shaded area in Figure 1. If the operating position is within this area, measures must be taken to protect the driver's safety. Approved by the State Bureau of Technical Supervision on December 16, 1991 and implemented on October 1, 1992
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Travel Direction
Sketch of operating positions to be avoided
3 When the winch is working within the rated load, the operating force and operating stroke of each operating part shall not exceed the provisions of Table 1. Table 1 Operating force and stroke
Operation mode
Operation force
3.4 When the rated pulling force of the winch is greater than 125kN, a rope guide shall be installed. 3.5 Wire rope
3.5.1 The wire rope used for the winch shall comply with the provisions of GB1102 and shall have an inspection certificate. 3.5.2 The safety factor of the wire rope shall not be less than 5. Stroke
3.5.3 The number of safe turns of the wire rope wound on the drum shall not be less than 3 turns. The end of the wire rope should be fixed reliably and should be able to withstand 1.25 times the rated tension of the wire rope while retaining two turns. 3.5.4 Rope end fixing
The wire rope should be fixed with a conical sleeve, braided insert, shaped sleeve, rope clamp, pressed joint, pressure plate, etc. corresponding to its diameter. The rope end fixing strength is shown in Table 2.
2 Rope end fixing strength table
Rope end fixing form
Conical sleeve
Wedge sleeve
Pressed joint
Fixing strength
75%~95%
65%~70%
80%~85%
Cast aluminum, zinc liquid
90% for wire rope diameter below 15mm, 85% for 16~26mm, 80% for 28~36mm; 75% for above 39mm
Slope 1:4, rope end should be tied
Aluminum alloy pressed joint
Note: "Fixing strength" refers to the percentage of the tension borne by the fixed part of the wire rope equivalent to the breaking tension of the wire rope. When braiding and plugging are used for fixing, the length of the braiding part shall not be less than 20 times the diameter of the wire rope and shall not be less than 300mm. The braiding part a.
should be tied with fine steel wire, see Figure 2a.
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Figure 2 Rope end fixing of braiding and plugging and rope clamp
b. When rope clamps are used for fixing, the number of rope clamps is related to the diameter of the wire rope, see Table 3. The number of working rope clamps shall not be less than 3, and a safety rope clamp shall be added at the tail end. The spacing between rope clamps shall not be less than 6 times the diameter of the wire rope, and the distance between the rope head and the safety rope clamp shall not be less than 140mm, and they shall be tied with fine steel wire. The rope clamp saddle is placed on the side of the wire rope that is subjected to force during operation, and the U-bolt is buckled at the tail end of the wire rope. Rope clamps shall not be set in a staggered manner, see Figure 2b.
Fix the rope clip before the wire rope is stressed, and tighten it again after it is stressed. Table 3 Number of rope clips matching the wire rope diameter
Wire rope diameter, mm
Minimum number of rope clips
Note: The number of rope clips does not include safety rope clips. 3.5.5 Maintenance of wire rope:
≥10~20
>21~26
>28~36
The performance of the wire rope should be prevented from being reduced due to damage, corrosion or other physical and chemical conditions; when cutting the wire rope, measures should be taken to prevent the rope strands from spreading;>37～40
When installing the wire rope, it should not be dragged in unclean places, nor should it be wrapped around other objects; when pulling the wire rope out from the drum or wire rope roll, measures should be taken to prevent the wire rope from being damaged, tangled, bent and tangled. The wire rope should be protected from scratches, grinding, rolling and excessive bending; d. The wire rope should be well lubricated. The lubrication cycle should be determined according to the usage and lubrication should be done regularly. When lubricating, special attention should be paid to the area in contact with the pulley and other parts that are difficult to inspect and repair. The lubricant should meet the requirements of the rope and should not affect the appearance inspection. 3.5.6 The inspection and scrapping of wire ropes shall comply with the provisions of GB5972. 3.6 Drum
The pitch diameter of the drum should not be less than 19 times the nominal diameter of the wire rope used. 3.6.2
The distance from the outer periphery of the drum edge to the outermost wire rope should not be less than 1.5 times the diameter of the wire rope. 3.6.3
The drum should be scrapped if any of the following conditions occur: cracks or edge damage;
b. The wear of the drum wall reaches 10% of the original wall thickness. W. Engineering Construction Standard Full Text Information System
3.7 Brakes and Clutches
3.7.1 The winch shall be equipped with at least one brake. 3.7.2 The braking torque of the brake shall be greater than 1.5 times the static torque of the wire rope at rated tension. 3.7.3 The brake controlled by power must be normally closed. 3.7.4 After assembly, the distribution area of the contact spots between the brake friction pad and the working surface of the brake wheel and the two engaging surfaces of the clutch shall not be less than 80% of the theoretical contact area.
3.7.5 When the clutch is in the released state, the two engaging surfaces shall be able to be completely separated. 3.7.6
Replacement and adjustment of brake and clutch parts: any part should be replaced immediately if cracks appear. b.
Brake friction pads should be replaced when the wear reaches 50% of the original pad thickness; c.
Brake wheel working surface wear should be replaced when it reaches 2~3mm (large diameter takes the larger value, small diameter takes the smaller value); d.
Springs should be replaced when plastic deformation occurs;
Pin or shaft rolling diameter wear reaches 5% of the original diameter should be replaced; in the relaxed state, the gap between the brake band (block) and the brake wheel should be uniform, and the gap value is: 1~2.5mm between the brake band and the brake wheel; f.
Brake block and brake wheel 0.25~1mm, if this exceeds the regulations, the brake should be adjusted. 3.8 Coupling
3.8.1 The assembly of the coupling should comply with the provisions of JJ15. 3.8.2
Each part of the elastic pin coupling shall be scrapped if any of the following conditions occur: a.
Cracks;
Elastic element is damaged or severely worn.
3.8.3Each part of the gear coupling shall be scrapped if any of the following conditions occur: a.
Cracks;
Broken teeth;
When the tooth thickness wear reaches 15% of the original tooth thickness.
Other types of couplings shall also be scrapped or replaced if similar conditions occur. 3.9 Transmission gear
Transmission gears shall be scrapped when any of the following conditions occur: a. Cracks,
b. Broken teeth;
When pitting of the tooth surface reaches 30% of the meshing surface and the depth reaches 10% of the original tooth thickness; c.
d. When the percentage of tooth thickness wear to the original tooth thickness reaches the following values: 10% (first-stage meshing) and 20% (other-stage meshing) for closed gear transmission; 30% for open gear transmission.
4 Safety protection device
4.1 Exposed moving parts on the winch, such as open gears, couplings, pulleys, etc., shall be equipped with protective covers when accidents may occur under normal operating conditions.
4.2 A rain shelter shall be installed for winches working outdoors, and the installation of the rain shelter shall not affect the driver's operation and inspection. 4.3 When the winch is used to lift heavy objects, an overtravel limit switch shall be installed. 4.4 Other devices, such as overload protection, overspeed protection, and lowering overtravel limit switch, should be considered as appropriate according to the construction situation. 5 Electrical system
5.1 General requirements
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5.1.1 Electrical control equipment and components should be installed in the cabinet (box), and the electrical cabinet (box) should have a door lock. 5.1.2 The metal structure of the winch and the metal shell, pipe trough, and cable metal sheath of the electrical equipment should be grounded. The grounding resistance shall not be greater than 4Q. The selection and installation of the grounding device shall comply with the provisions of GBJ232. 5.1.3 The winch should use copper core multi-strand wires and should be insulated with rubber or plastic. The cross-sectional area of the cable and wire should be selected according to the current carrying capacity, but shall not be less than 1.5mm2.
5.1.4 The electrical equipment should be installed firmly, and the electrical connection should have good contact and not be easy to loosen. 5.1.5 The driver's operating position should have good lighting when the winch is working at night. 5.2 Electrical components
Contactors, controllers, circuit breakers, switches and other electrical components should work sensitively and reliably, and the contacts should be smooth and flat, with good contact and not prone to adhesion and jamming.
5.3 Electrical protection
5.3.1 A main isolating switch with a fuse should be installed at the line inlet of the winch, or other isolation measures should be taken. 5.3.2 The winch should be equipped with an emergency power-off switch that can quickly cut off the main control power supply in an emergency, and installed in a place where the driver can operate conveniently.
5.3.3 The winch should be equipped with short-circuit and over-current protection, pressure loss protection, and zero-position protection. 5.3.4 The remote-controlled winch must have facilities to ensure that the winch stops moving when the control signal fails. 6 Use
6.1 Driver
6.1.1 The winch should be operated by the following personnel: a driver who has passed the examination;
b. Trainees under the direct guidance of the driver;
Maintenance and inspection personnel when their duties require it. The driver should be a person who is in good health, has passed the assessment and obtained a certificate of qualification. 6.1.2
6.1.3 The driver should be familiar with the structure and technical performance of the winch, the safe operating procedures and this standard, and should master the maintenance and basic repair knowledge. 6.2 Installation
6.2.1 The installation site of the winch should be flat. The connection between the winch and the foundation or chassis should be firm and should comply with the provisions of the instruction manual. 6.2.2 There should be no obstacles between the winch and the load that may cause danger or affect the life of the wire rope. 6.2.3 The ratio h of the minimum nominal diameter of the pulley used for the winch wire rope to the wire rope diameter should comply with the provisions of Table 4. Table 4h value
Rated tension of wire rope, kN
6.2.4 When installing the winch, the drum should be aligned with the fixed pulley, and the wire rope outlet angle α (see Figure 3) should meet the following requirements: Natural rope arrangement: a≤1°30
Rope arrangement by rope arrangement device: a2°
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Figure 3 Schematic diagram of wire rope outlet angle α
6.2.5 The installation of the winch should ensure that there is no displacement or obvious vibration of the body during operation. 6.3 Operation requirements
6.3.1 Before starting the machine, check the brake performance, wire rope joints, various fasteners and the installation of the machine body. If any abnormal situation is found, it should be eliminated immediately.
6.3.2 The winch shall not be overloaded.
6.3.3 Since the rated tension of the wire rope is the maximum static tension of the reference layer, when the wire rope is wound beyond the reference layer, it should be carried out according to the provisions in the instruction manual.
6.3.4 When the power is suddenly cut off during work, the controller handle or button should be placed at zero position. If the wire rope is in a tensioned state, the driver shall not leave the operating position.
6.3.5 The operation shall be carried out according to the command signal, but the emergency stop signal shall be executed immediately regardless of who issues it. 6.3.6
After work, the wire rope is in a relaxed state, the power supply is cut off, and the power switch is closed. Records should be made when changing shifts, and the driver who takes over must be notified if there is any fault that has not been eliminated. The winch shall not be used to transport personnel.
It is strictly forbidden to use human power to open the electric control brake to achieve slipping. 7 Inspection and maintenance
7.1 The following situations shall be subject to qualified inspection of the winch: a. Www.bzxZ.net
Before the winch leaves the factory;
Before the winch that has been overhauled, reassembled and modified is used; before the winch that has been idle for more than one year is used again. c.
7.2 Qualified inspection shall be carried out in accordance with the relevant provisions of GB6947. 7.3 When the strength, rigidity and main performance of the winch are damaged, type inspection shall be carried out in accordance with GB6947 (reliability test and industrial test may not be carried out).
7.4 Regular inspection The inspection cycle shall be determined according to the heavy workload and harsh environment of the winch, but shall not be less than once a month. The inspection content includes the following items and a judgment shall be made on whether the fault constitutes a hazard: a. Any damage and destruction that can be observed during operation and may occur within the inspection cycle b. Whether the working performance of the winch and the various control mechanisms are out of adjustment; W Engineering Construction Standard Full Text Information System
c. All safety protection devices;
d. Wear and deformation of each part, especially the wear and end fixation of the wire rope. 7.5 The inspection cycle should be determined according to the heavy workload and the harsh environment, but it should not be less than once a year. The regular inspection should be recorded and included in the equipment file. The inspection content includes the following items and a judgment should be made on whether the failure constitutes a hazard: the content specified in Article 7.4;
The wear, deformation, cracks and corrosion of parts; c.
The connection of bolts and rivets;
Whether there is pitting or wear on electrical equipment such as controllers, contactors, switches, buttons, etc. 7.6 Any unsafe factors found must be eliminated before the winch is used again. 7.7 The adjustment and maintenance of the winch should be carried out in accordance with the relevant provisions in the instruction manual and completed by designated personnel. 7.8 The performance and materials of the replacement parts should not be lower than the requirements of the original parts. 7.9 When the structural parts need to be welded, all materials, welding rods, etc. should meet the requirements of the original structural parts, and the welding quality should meet the requirements of JJ12.3. If there are special requirements, they should be handled in accordance with the instructions or design drawings. Precautions during maintenance:
Before maintenance, cut off the main power supply and hang the maintenance signboard; b.
Before maintenance, all operating parts should be placed in the zero position; c.
The winch can only be used after all guards are installed, safety devices are restored to work, and maintenance equipment is removed. Additional notes:
This standard is proposed by the Ministry of Construction of the People's Republic of China. This standard is under the jurisdiction of the Beijing Institute of Comprehensive Construction Machinery, the technical unit of mechanical equipment and vehicle standards of the Ministry of Construction. This standard was drafted by the Changsha Institute of Construction Machinery of the Ministry of Construction. The main drafter of this standard is Kang Zhiwei.
This standard is entrusted to the Changsha Institute of Construction Machinery of the Ministry of Construction for interpretation. W.bzsoso.coI1Electrical control equipment and components should be installed in the cabinet (box), and the electrical cabinet (box) should have a door lock. 5.1.2The metal structure of the winch and the metal shell, pipe trough, cable metal sheath of the electrical equipment should be grounded, and the grounding resistance should not be greater than 4Q. The selection and installation of the grounding device should comply with the provisions of GBJ232. 5.1.3The winch should use copper core multi-strand wires and rubber or plastic insulation. The cross-sectional area of the cable and wire should be selected according to the current carrying capacity, but it should not be less than 1.5mm2.
5.1.4The electrical equipment should be installed firmly, and the electrical connection should have good contact and not easy to loosen. 5.1.5The driver's operating position should have good lighting when the winch is working at night. 5.2Electrical components
Electrical components such as contactors, controllers, circuit breakers, switches, etc. should work sensitively and reliably, and the contacts should be smooth and flat, with good contact, and not easy to stick or jam.
5.3 Electrical protection
5.3.1 A main isolating switch with a fuse should be installed at the line inlet of the winch, or other isolation measures should be taken. 5.3.2 The winch should be equipped with an emergency power-off switch that can quickly cut off the main control power supply in an emergency, and installed in a place where the driver can operate it easily.
5.3.3 The winch should be equipped with short-circuit and overcurrent protection, pressure loss protection, and zero position protection. 5.3.4 The remote-controlled winch must have facilities to ensure that the winch stops moving when the control signal fails. 6 Use
6.1 Driver
6.1.1 The winch should be operated by the following personnel: a. A driver who has passed the examination; b. A trainee under the direct guidance of the driver;
Maintenance and inspection personnel when their duties require it. The driver should be a person who is in good health, has been assessed and obtained a certificate of qualification. 6.1.2
6.1.3 The driver should be familiar with the structure and technical performance of the winch, the safe operating procedures and this standard, and should have knowledge of maintenance and basic repairs. 6.2 Installation
6.2.1 The installation site of the winch should be flat. The connection between the winch and the foundation or chassis should be firm and comply with the provisions of the instruction manual. 6.2.2 There should be no obstacles between the winch and the load that may cause danger or affect the life of the wire rope. 6.2.3 The ratio h of the minimum nominal diameter of the pulley used for the winch wire rope to the wire rope diameter should comply with the provisions of Table 4. Table 4h value
Rated tension of wire rope, kN
6.2.4 When installing the winch, the drum should be aligned with the fixed pulley, and the wire rope outlet angle α (see Figure 3) should meet the following requirements: Natural rope arrangement: a≤1°30
Rope arrangement by rope arrangement device: a2°
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Figure 3 Schematic diagram of wire rope outlet angle α
6.2.5 The installation of the winch should ensure that there is no displacement or obvious vibration of the body during operation. 6.3 Operation requirements
6.3.1 Before starting the machine, check the brake performance, wire rope joints, various fasteners and the installation of the machine body. If any abnormal situation is found, it should be eliminated immediately.
6.3.2 The winch shall not be overloaded.
6.3.3 Since the rated tension of the wire rope is the maximum static tension of the reference layer, when the wire rope is wound beyond the reference layer, it should be carried out according to the provisions in the instruction manual.
6.3.4 When the power is suddenly cut off during work, the controller handle or button should be placed at zero position. If the wire rope is in a tensioned state, the driver shall not leave the operating position.
6.3.5 The operation shall be carried out according to the command signal, but the emergency stop signal shall be executed immediately regardless of who issues it. 6.3.6
After work, the wire rope is in a relaxed state, the power supply is cut off, and the power switch is closed. Records should be made when changing shifts, and the driver who takes over must be notified if there is any fault that has not been eliminated. The winch shall not be used to transport personnel.
It is strictly forbidden to use human power to open the electric control brake to achieve slipping. 7 Inspection and maintenance
7.1 The following situations shall be subject to qualified inspection of the winch: a.
Before the winch leaves the factory;
Before the winch that has been overhauled, reassembled and modified is used; before the winch that has been idle for more than one year is used again. c.
7.2 Qualified inspection shall be carried out in accordance with the relevant provisions of GB6947. 7.3 When the strength, rigidity and main performance of the winch are damaged, type inspection shall be carried out in accordance with GB6947 (reliability test and industrial test may not be carried out).
7.4 Regular inspection The inspection cycle shall be determined according to the heavy workload and harsh environment of the winch, but shall not be less than once a month. The inspection content includes the following items and a judgment shall be made on whether the fault constitutes a hazard: a. Any damage and destruction that can be observed during operation and may occur within the inspection cycle b. Whether the working performance of the winch and the various control mechanisms are out of adjustment; W Engineering Construction Standard Full Text Information System
c. All safety protection devices;
d. Wear and deformation of each part, especially the wear and end fixation of the wire rope. 7.5 The inspection cycle should be determined according to the heavy workload and the harsh environment, but it should not be less than once a year. The regular inspection should be recorded and included in the equipment file. The inspection content includes the following items and a judgment should be made on whether the failure constitutes a hazard: the content specified in Article 7.4;
The wear, deformation, cracks and corrosion of parts; c.
The connection of bolts and rivets;
Whether there is pitting or wear on electrical equipment such as controllers, contactors, switches, buttons, etc. 7.6 Any unsafe factors found must be eliminated before the winch is used again. 7.7 The adjustment and maintenance of the winch should be carried out in accordance with the relevant provisions in the instruction manual and completed by designated personnel. 7.8 The performance and materials of the replacement parts should not be lower than the requirements of the original parts. 7.9 When the structural parts need to be welded, all materials, welding rods, etc. should meet the requirements of the original structural parts, and the welding quality should meet the requirements of JJ12.3. If there are special requirements, they should be handled in accordance with the instructions or design drawings. Precautions during maintenance:
Before maintenance, cut off the main power supply and hang the maintenance signboard; b.
Before maintenance, all operating parts should be placed in the zero position; c.
The winch can only be used after all guards are installed, safety devices are restored to work, and maintenance equipment is removed. Additional notes:
This standard is proposed by the Ministry of Construction of the People's Republic of China. This standard is under the jurisdiction of the Beijing Institute of Comprehensive Construction Machinery, the technical unit of mechanical equipment and vehicle standards of the Ministry of Construction. This standard was drafted by the Changsha Institute of Construction Machinery of the Ministry of Construction. The main drafter of this standard is Kang Zhiwei.
This standard is entrusted to the Changsha Institute of Construction Machinery of the Ministry of Construction for interpretation. W.bzsoso.coI1Electrical control equipment and components should be installed in the cabinet (box), and the electrical cabinet (box) should have a door lock. 5.1.2The metal structure of the winch and the metal shell, pipe trough, cable metal sheath of the electrical equipment should be grounded, and the grounding resistance should not be greater than 4Q. The selection and installation of the grounding device should comply with the provisions of GBJ232. 5.1.3The winch should use copper core multi-strand wires and rubber or plastic insulation. The cross-sectional area of the cable and wire should be selected according to the current carrying capacity, but it should not be less than 1.5mm2.
5.1.4The electrical equipment should be installed firmly, and the electrical connection should have good contact and not easy to loosen. 5.1.5The driver's operating position should have good lighting when the winch is working at night. 5.2Electrical components
Electrical components such as contactors, controllers, circuit breakers, switches, etc. should work sensitively and reliably, and the contacts should be smooth and flat, with good contact, and not easy to stick or jam.
5.3 Electrical protection
5.3.1 A main isolating switch with a fuse should be installed at the line inlet of the winch, or other isolation measures should be taken. 5.3.2 The winch should be equipped with an emergency power-off switch that can quickly cut off the main control power supply in an emergency, and installed in a place where the driver can operate it easily.
5.3.3 The winch should be equipped with short-circuit and overcurrent protection, pressure loss protection, and zero position protection. 5.3.4 The remote-controlled winch must have facilities to ensure that the winch stops moving when the control signal fails. 6 Use
6.1 Driver
6.1.1 The winch should be operated by the following personnel: a. A driver who has passed the examination; b. A trainee under the direct guidance of the driver;
Maintenance and inspection personnel when their duties require it. The driver should be a person who is in good health, has been assessed and obtained a certificate of qualification. 6.1.2
6.1.3 The driver should be familiar with the structure and technical performance of the winch, the safe operating procedures and this standard, and should have knowledge of maintenance and basic repairs. 6.2 Installation
6.2.1 The installation site of the winch should be flat. The connection between the winch and the foundation or chassis should be firm and comply with the provisions of the instruction manual. 6.2.2 There should be no obstacles between the winch and the load that may cause danger or affect the life of the wire rope. 6.2.3 The ratio h of the minimum nominal diameter of the pulley used for the winch wire rope to the wire rope diameter should comply with the provisions of Table 4. Table 4h value
Rated tension of wire rope, kN
6.2.4 When installing the winch, the drum should be aligned with the fixed pulley, and the wire rope outlet angle α (see Figure 3) should meet the following requirements: Natural rope arrangement: a≤1°30
Rope arrangement by rope arrangement device: a2°
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Figure 3 Schematic diagram of wire rope outlet angle α
6.2.5 The installation of the winch should ensure that there is no displacement or obvious vibration of the body during operation. 6.3 Operation requirements
6.3.1 Before starting the machine, check the brake performance, wire rope joints, various fasteners and the installation of the machine body. If any abnormal situation is found, it should be eliminated immediately.
6.3.2 The winch shall not be overloaded.
6.3.3 Since the rated tension of the wire rope is the maximum static tension of the reference layer, when the wire rope is wound beyond the reference layer, it should be carried out according to the provisions in the instruction manual.
6.3.4 When the power is suddenly cut off during work, the controller handle or button should be placed at zero position. If the wire rope is in a tensioned state, the driver shall not leave the operating position.
6.3.5 The operation shall be carried out according to the command signal, but the emergency stop signal shall be executed immediately regardless of who issues it. 6.3.6
After work, the wire rope is in a relaxed state, the power supply is cut off, and the power switch is closed. Records should be made when changing shifts, and the driver who takes over must be notified if there is any fault that has not been eliminated. The winch shall not be used to transport personnel.
It is strictly forbidden to use human power to open the electric control brake to achieve slipping. 7 Inspection and maintenance
7.1 The following situations shall be subject to qualified inspection of the winch: a.
Before the winch leaves the factory;
Before the winch that has been overhauled, reassembled and modified is used; before the winch that has been idle for more than one year is used again. c.
7.2 Qualified inspection shall be carried out in accordance with the relevant provisions of GB6947. 7.3 When the strength, rigidity and main performance of the winch are damaged, type inspection shall be carried out in accordance with GB6947 (reliability test and industrial test may not be carried out).
7.4 Regular inspection The inspection cycle shall be determined according to the heavy workload and harsh environment of the winch, but shall not be less than once a month. The inspection content includes the following items and a judgment shall be made on whether the fault constitutes a hazard: a. Any damage and destruction that can be observed during operation and may occur within the inspection cycle b. Whether the working performance of the winch and the various control mechanisms are out of adjustment; W Engineering Construction Standard Full Text Information System
c. All safety protection devices;
d. Wear and deformation of each part, especially the wear and end fixation of the wire rope. 7.5 The inspection cycle should be determined according to the heavy workload and the harsh environment, but it should not be less than once a year. The regular inspection should be recorded and included in the equipment file. The inspection content includes the following items and a judgment should be made on whether the failure constitutes a hazard: the content specified in Article 7.4;
The wear, deformation, cracks and corrosion of parts; c.
The connection of bolts and rivets;
Whether there is pitting or wear on electrical equipment such as controllers, contactors, switches, buttons, etc. 7.6 Any unsafe factors found must be eliminated before the winch is used again. 7.7 The adjustment and maintenance of the winch should be carried out in accordance with the relevant provisions in the instruction manual and completed by designated personnel. 7.8 The performance and materials of the replacement parts should not be lower than the requirements of the original parts. 7.9 When the structural parts need to be welded, all materials, welding rods, etc. should meet the requirements of the original structural parts, and the welding quality should meet the requirements of JJ12.3. If there are special requirements, they should be handled in accordance with the instructions or design drawings. Precautions during maintenance:
Before maintenance, cut off the main power supply and hang the maintenance signboard; b.
Before maintenance, all operating parts should be placed in the zero position; c.
The winch can only be used after all guards are installed, safety devices are restored to work, and maintenance equipment is removed. Additional notes:
This standard is proposed by the Ministry of Construction of the People's Republic of China. This standard is under the jurisdiction of the Beijing Institute of Comprehensive Construction Machinery, the technical unit of mechanical equipment and vehicle standards of the Ministry of Construction. This standard was drafted by the Changsha Institute of Construction Machinery of the Ministry of Construction. The main drafter of this standard is Kang Zhiwei.
This standard is entrusted to the Changsha Institute of Construction Machinery of the Ministry of Construction for interpretation. W.bzsoso.coI4 When installing the winch, the drum should be aligned with the fixed pulley, and the wire rope deflection angle α (see Figure 3) should meet the following requirements: Natural rope arrangement: a≤1°30
Rope arrangement by rope arrangement device: a2°
W.bzsoso.coI Engineering Construction Standard Full Text Information System
Figure 3 Schematic diagram of wire rope deflection angle α
6.2.5 The installation of the winch should ensure that the body does not shift or vibrate significantly during operation. 6.3 Operation requirements
6.3.1 Before starting the machine, check the performance of the brake, the wire rope joint, the fasteners and the installation of the machine body. If any abnormal situation is found, it should be eliminated immediately.
6.3.2 The winch shall not be overloaded.
6.3.3 Since the rated tension of the wire rope is the maximum static tension of the reference layer, when the wire rope is wound beyond the reference layer, it should be carried out according to the provisions in the instruction manual.
6.3.4 When the power is suddenly cut off during operation, the controller handle or button should be placed at zero position. If the wire rope is in a tensioned state, the driver shall not leave the operating position.
6.3.5 The operation shall be carried out according to the command signal, but the emergency stop signal shall be executed immediately regardless of who issues it. 6.3.6
After work, the wire rope is in a relaxed state, the power supply is cut off, and the power switch is closed. Records should be made when changing shifts. If there is a fault that has not been eliminated, the driver who takes over must be notified. The winch shall not be used to transport personnel.
It is strictly forbidden to use the power-controlled brake manually to achieve slipping. 7 Inspection and maintenance
7.1 The winch shall be inspected for qualification in the following situations: a.
Before the winch leaves the factory;
Before the winch that has been overhauled, reassembled and modified is used; before the winch that has been idle for more than one year is used again. c.
7.2 The qualified inspection shall be carried out in accordance with the relevant provisions of GB6947. 7.3 When the strength, rigidity and main performance of the winch are damaged, the type inspection shall be carried out in accordance with GB6947 (reliability test and industrial test may not be carried out).
7.4 The inspection cycle of regular inspection shall be determined according to the heavy workload and harsh environment of the winch, but shall not be less than once a month. The inspection content includes the following items and a judgment shall be made on whether the fault constitutes a hazard: a. Any damage and destruction that can be observed during operation and may occur within the inspection cycle b. The working performance of the winch and whether the various control mechanisms are out of adjustment; W Engineering Construction Standard Full Text Information System
c. All safety protection devices;
d. The wear and deformation of each part, especially the wear and end fixation of the wire rope. 7.5 The inspection cycle of regular inspection shall be determined according to the heavy workload and harsh environment, but shall not be less than once a year. Regular inspections shall be recorded and included in the equipment files. The inspection content includes the following items and a judgment should be made as to whether the fault constitutes a hazard: the content specified in Article 7.4;
the wear, deformation, cracks and corrosion of parts; c.
the connection condition of bolts and rivets;
whether electrical equipment such as controllers, contactors, switches, buttons, etc. have pitting or wear. 7.6 Any unsafe factors found must be eliminated before the winch is reused. 7.7 The adjustment and maintenance of the winch should be carried out in accordance with the relevant provisions in the instruction manual and completed by designated personnel. 7.8 The performance and materials of the replacement parts should not be lower than the requirements of the original parts. 7.9 When structural parts need to be welded, all materials, welding rods, etc. should meet the requirements of the original structural parts, and the welding quality should meet the requirements of JJ12.3. If there are special requirements, they should be handled in accordance with the provisions of the instruction manual or design drawings. Precautions for maintenance:
Before maintenance, first cut off the main power supply and hang the maintenance sign; b.
Before maintenance, all operating parts should be placed in zero position; c.
The winch can only be used after all guard plates are installed, safety devices are restored to work, and maintenance equipment is removed. Additional instructions:
This standard is proposed by the Ministry of Construction of the People's Republic of China. This standard is under the jurisdiction of the Beijing Construction Machinery Comprehensive Research Institute, the technical unit responsible for mechanical equipment and vehicle standards of the Ministry of Construction. This standard was drafted by the Changsha Construction Machinery Research Institute of the Ministry of Construction. The main drafter of this standard is Kang Zhiwei.
This standard is entrusted to the Changsha Construction Machinery Research Institute of the Ministry of Construction for interpretation. W.bzsoso.coI4 When installing the winch, the drum should be aligned with the fixed pulley, and the wire rope deflection angle α (see Figure 3) should meet the following requirements: Natural rope arrangement: a≤1°30
Rope arrangement by rope arrangement device: a2°
W.bzsoso.coI Engineering Construction Standard Full Text Information System
Figure 3 Schematic diagram of wire rope deflection angle α
6.2.5 The installation of the winch should ensure that the body does not shift or vibrate significantly during operation. 6.3 Operation requirements
6.3.1 Before starting the machine, check the performance of the brake, the wire rope joint, the fasteners and the installation of the machine body. If any abnormal situation is found, it should be eliminated immediately.
6.3.2 The winch shall not be overloaded.
6.3.3 Since the rated tension of the wire rope is the maximum static tension of the reference layer, when the wire rope is wound beyond the reference layer, it should be carried out according to the provisions in the instruction manual.
6.3.4 When the power is suddenly cut off during operation, the controller handle or button should be placed at zero position. If the wire rope is in a tensioned state, the driver shall not leave the operating position.
6.3.5 The operation shall be carried out according to the command signal, but the emergency stop signal shall be executed immediately regardless of who issues it. 6.3.6
After work, the wire rope is in a relaxed state, the power supply is cut off, and the power switch is closed. Records should be made when changing shifts. If there is a fault that has not been eliminated, the driver who takes over must be notified. The winch shall not be used to transport personnel.
It is strictly forbidden to use the power-controlled brake manually to achieve slipping. 7 Inspection and maintenance
7.1 The winch shall be inspected for qualification in the following situations: a.
Before the winch leaves the factory;
Before the winch that has been overhauled, reassembled and modified is used; before the winch that has been idle for more than one year is used again. c.
7.2 The qualified inspection shall be carried out in accordance with the relevant provisions of GB6947. 7.3 When the strength, rigidity and main performance of the winch are damaged, the type inspection shall be carried out in accordance with GB6947 (reliability test and industrial test may not be carried out).
7.4 The inspection cycle of regular inspection shall be determined according to the heavy workload and harsh environment of the winch, but shall not be less than once a month. The inspection content includes the following items and a judgment shall be made on whether the fault constitutes a hazard: a. Any damage and destruction that can be observed during operation and may occur within the inspection cycle b. The working performance of the winch and whether the various control mechanisms are out of adjustment; W Engineering Construction Standard Full Text Information System
c. All safety protection devices;
d. The wear and deformation of each part, especially the wear and end fixation of the wire rope. 7.5 The inspection cycle of regular inspection shall be determined according to the heavy workload and harsh environment, but shall not be less than once a year. Regular inspections shall be recorded and included in the equipment files. The inspection content includes the following items and a judgment should be made as to whether the fault constitutes a hazard: the content specified in Article 7.4;
the wear, deformation, cracks and corrosion of parts; c.
the connection condition of bolts and rivets;
whether electrical equipment such as controllers, contactors, switches, buttons, etc. have pitting or wear. 7.6 Any unsafe factors found must be eliminated before the winch is reused. 7.7 The adjustment and maintenance of the winch should be carried out in accordance with the relevant provisions in the instruction manual and completed by designated personnel. 7.8 The performance and materials of the replacement parts should not be lower than the requirements of the original parts. 7.9 When structural parts need to be welded, all materials, welding rods, etc. should meet the requirements of the original structural parts, and the welding quality should meet the requirements of JJ12.3. If there are special requirements, they should be handled in accordance with the provisions of the instruction manual or design drawings. Precautions for maintenance:
Before maintenance, first cut off the main power supply and hang the maintenance sign; b.
Before maintenance, all operating parts should be placed in zero position; c.
The winch can only be used after all guard plates are installed, safety devices are restored to work, and maintenance equipment is removed. Additional instructions:
This standard is proposed by the Ministry of Construction of the People's Republic of China. This standard is under the jurisdiction of the Beijing Construction Machinery Comprehensive Research Institute, the technical unit responsible for mechanical equipment and vehicle standards of the Ministry of Construction. This standard was drafted by the Changsha Construction Machinery Research Institute of the Ministry of Construction. The main drafter of this standard is Kang Zhiwei.
This standard is entrusted to the Changsha Construction Machinery Research Institute of the Ministry of Construction for interpretation. W.bzsoso.coI
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