JG 5027-1992 Safety rules for suspended platforms for working at heights JG5027-92 JG5027-1992 Standard download decompression password: www.bzxz.net

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Construction industry standard of the People's Republic of China JG5027-92
Safety regulations for suspended platforms for work at heights
Suspended powered platforms for work at heights-SafetyregulationConstruction standard
Published on December 2, 1992
Ministry of Construction of the People's Republic of China
Implementation on August 1, 1993
Table of contents
Construction industry standard of the People's Republic of China Safety regulations for suspended platforms for work at heights
Suspended poweredl platforms for work at heights-Safety regulationSubject content and scope of application
JG5027-92
This standard specifies the safety requirements for the design, manufacture, installation, use, repair and maintenance of suspended platforms for work at heights (hereinafter referred to as suspended baskets).
This standard applies to various types of permanent or non-permanent hanging platforms, which are installed in the form of rails or trackless, and the lifting method is climbing or winching.
This standard does not apply to direct transportation equipment dedicated to carrying goods and passengers. 2 Reference standards
GB1102 Round strand steel wire rope
GB5144 Safety regulations for hoisting machines
GB5972 Practical specification for inspection and scrapping of steel wire ropes for lifting machinery GB8902 Steel wire ropes for aviation
3 Terms
3.1 Lifting mechanism
Transmission mechanism that enables the hoist platform to move up and down. 3.2 Half platform
A suspended structure that can move up and down: so that the operator can reach the working place of the building or structure. 3.3 Suspension mechanism
Components installed on buildings or structures to support the steel wire rope and safety wire rope of the suspended platform. 3.4 Safety lock
When the suspended platform descends beyond the limit speed, the device can automatically lock the suspended platform. The cover cannot automatically reset. 3.5 Travel limit
Limitation of the running distance and position of the suspended platform in the upper and lower directions. Approved by the Ministry of Construction of the People's Republic of China on December 2, 1992
Implementation on August 1, 1993
Results
3.6 Rated load
The maximum value of the total mass of the workers, tools, equipment and materials allowed to be carried on the suspended platform. 3.7 Permanent suspended platform
A permanent equipment of a building or structure. 3.8 Non-equipped hanging basket
Temporary erection on buildings or structures. 3.9 Track-type
Suspension mechanism with steel wheels, installed on buildings or structures with tracks. 3.10 Trackless
The total hanging mechanism is directly placed on the building or structure. General requirements
4. 1 The working environment temperature of the product is -20~~40℃. 4.2 The gust wind of the hanging basket platform at the working place shall not exceed 10.8m/s (when the wind force is level 6). 4.3 The manufacture of the product basket shall be carried out according to the relevant standards and design drawings. Products with unqualified quality shall not be shipped and used. 4.4 The following technical documents must be attached when leaving the factory: a. Product certificate: b. Installation, use and maintenance instructions; c. Installation drawings, wearing parts drawings, electrical original class diagrams and wiring diagrams, hydraulic system diagrams, etc. 4.5 The product must have a clear, eye-catching and durable label! The label should state the product name, main technical performance, manufacturing period, small advertisement number, manufacturer, etc.
4.6 The operator of the hanging basket must be a person who is suitable for commercial operations and has undergone technical training and passed the assessment. 5 Structural safety factor
5.1 The safety factor of the structural parts used by the hanging basket shall not be less than 2, depending on the minimum yield strength of the material. 5.2 The safety factor of the bearing parts made of the extension material (such as cast iron, glass fiber) used for the hanging basket shall not be less than 5, depending on the minimum strength limit of the material.
5.3 The design stress used to determine the structural safety factor shall be the maximum value that the parts must produce. At this time, the hanging chain should work under the specified load that meets the design requirements and comply with the operating procedures provided by the manufacturer. Design stress includes the influence of stress concentration and dynamic load. The structural safety factor is calculated as follows: Ki-(+m)fif
wherein——structural safety factor;
-material compression strength mentioned in 5.1, or strength limit mentioned in 5.2; f2-stress caused by structural mass;
32-stress caused by rated load;
[get standard limit coefficient
——stress concentration factor;
f—dynamic load factor. The values ​​of
and f2 can be determined by experimental stress analysis of the prototype, or}, greater than or equal to 1.10, f2 greater than or equal to 1.25.
6 Material and processing quality requirements
6.1 Material
The materials used for the hanging basket shall comply with the requirements of the drawings and shall have the certificate of conformity of the supplier. The materials used for key components shall be subject to the factory inspection system.
6.2 Processing quality requirements
6.2.2 The surface of the casting should be smooth and even, and no sand holes, air holes, or casting openings are allowed. Flash and burrs should be removed and ground. 6.2.1 Casting defects on the machined surface of hydraulic and pneumatic components (such as oil pumps, oil motors, valves, cylinders, oil cylinders, etc.) are not allowed to be welded. Those on non-machined surfaces with defects that may cause seepage are not allowed to be repaired. 6.2.3 The flash and burrs on the mounting surface of forgings should be cleaned. 6.2.1 Forgings should not have defects such as cracks, layers, folds, forging scratches, scars, slag inclusions, etc. 6.2.5 The weld should be full, and there should be no defects such as leaks, cracks, slag, burn-through, glue meat, etc. The same weld should be evenly connected, and slag and welding slag should be cleaned.
6.2.6 Welded parts The quality inspection department of the manufacturer shall conduct the inspection. Non-destructive testing shall be used to inspect the internal defects of important seams.
6.2.7 There shall be no cracks or other serious defects on the surface of heat-treated parts. 6.2.8 For cracks, burns, dents and oxidation defects of heat-treated parts, the naked eye or a low-power magnifying glass can be used to inspect. For parts that need to be inspected with magnets, ultrasound and X-rays, the requirements shall be stated in the drawings or technical documents. 6.2.9 The machined parts shall comply with the product sample and relevant technical documents. 6.2.10 The machined parts shall comply with the product sample and relevant technical documents. There should be no defects such as rust, alkali, and scratches on the surface. 6.2.11 All parts and components manufactured by the manufacturer to be assembled must have the qualified mark of the quality inspection department; purchased parts and cooperative parts must have documents proving their qualification before they can be assembled. 6.2.12 The visible surface of the product should be painted with 1~2 coats of primer and 2~4 coats of topcoat. Except for welds, steel plate joints, scars, local unevenness or rough casting surfaces that affect the appearance, other painted surfaces cannot be filled. 7 Requirements for hanging basket platforms
7.1 The structure of the bucket platform should be able to withstand 2 times the uniformly distributed Rated load, load test must be done before loading, and check whether the furnace seam is cracked and whether the bolts are loose. 7.2 The welds of the main load-bearing components of the hanging platform must be inspected to ensure that the welds meet the design requirements. 7.3 The bottom plate of the hanging platform must have anti-slip measures. 7.4 The connection between the hanging platform and the lifting mechanism must be firm and reliable. There must not be any looseness, and it should be checked frequently. 7.5 The hanging platform should be equipped with a safety belt and a hook device for tools. 7.6 The minimum channel width in the platform shall not be less than 400mm, and the effective area of ​​the bottom plate shall not be less than 0.25m1. 3:1.r
Reasoning Stock Good Text Creative Quality
7.7 The platform of the hanging basket shall be equipped with a fixed safety railing, the height of which shall not be less than 800mm on the side close to the building, and the height of which shall not be less than 1100mm on the rear side and both sides. The railing shall be able to withstand a horizontal load of 1000N. 7.8 All components of the safety railing of the hanging basket platform shall be smooth and free of burrs, and shall not be skewed, bent, deformed or have other defects after installation.
7.9 A baffle with a height of not less than 100-150mm shall be installed around the bottom plate of the hanging platform, and the gap between the baffle and the bottom plate shall not exceed 5mm.
7.10 The hanging platform shall have a guide wheel that slides on the surface of the building or be equipped with a buffer device to ensure the stability of the hanging platform to avoid collision with the surface.
7.11 If the platform is equipped with a door, the door shall not open outwards, and an electrical interlocking device shall be installed on the door. 7.12 The normal operation control device of the suspended platform should be installed on the platform, and the equipment should be touch-sensitive and hand-operated and not affected by the weather.
8 Requirements for lifting mechanism
8.1 The drum of the winch-type lifting mechanism must have a wire drum, and the wire rope should be neatly wound on the drum. When the lifting height of the platform reaches the maximum stroke, the height of the wire drum above the last layer of wire rope on the drum is at least 2 times the absolute diameter of the wire.
8.2 The ratio of the minimum nominal diameter (D) of the drum of the winch-type lifting mechanism to the nominal diameter (α) of the wire rope should be not less than 20.
The ratio of the minimum nominal diameter (D) of the pulley of the climbing lifting mechanism to the nominal diameter (α) of the wire rope should be not less than 12. When D/d is equal to 12-18, aviation steel wire should be used. 8.8 The transmission of the lifting mechanism is prohibited from using friction devices, clutches, leather transmissions, etc. 8.4 The transmission parts of the lifting mechanism must be lubricated. It adopts self-sealing and self-lubricating, and the lubricating oil should be changed regularly.
8.5 All exposed transmission parts of the lifting mechanism must be equipped with a hood or similar anti-expansion device. 8.6 The transmission mechanism of the lifting mechanism should be equipped with a hand-driven device that can be operated by no more than two people in case of air failure. 8.7 The lifting mechanism must be equipped with brakes, and generally there should be two independent brakes. Both sets can make the basket platform with 125% of the rated load run and stop. 8.7.1 Main brake
The brake should be able to stop the basket platform within a range of 100mm, and a normally closed actuator should be used. The main brake should be of the matching type and installed on the lifting mechanism or the lifting motor. All parts of the brake should be easy to inspect and repair, and have waterproof protection. 8.7.2 Auxiliary brake
The auxiliary brake should generally be rigidly installed on the chute or base of the lifting mechanism. It can be used for normally closed braking or dynamic mechanical braking. The brake is mainly used when the lifting mechanism is manually driven: it can keep the hanging basket within the range of 100mm. Its installation position should be convenient for replacement, maintenance and adjustment, and have waterproof protection. 8.7.3 If the drum of the winch-type lifting mechanism is installed on the roof trolley (power arm is located on the roof), it must be equipped with a brake and must meet the requirements of 8.7.1 and 8.7.2. 134 Section 2
8.8 Lifting mechanism. The maximum rated speed of up and down operation shall not exceed 10m/min. 9 Requirements for safety protection devices
The hanging basket must generally be equipped with brakes, travel limits, safety locks, etc., and must be inspected and qualified before installation. 9.1 Brake
The suspension basket brake must meet the requirements of 8.7, 8.7.1, 8.7.2 and 8.7.3. 9. 2 Travel limit
9.2.1: The suspension platform must be equipped with upper and lower limit switches to prevent the suspension platform from rising or falling to the end point beyond the travel range. 9.2.2 The travel limit device must be installed in such a way that it is directly triggered by the suspension platform itself. 9.3 Safety lock
9.3.1 The suspension platform must be equipped with a safety lock, and a safety wire rope of the same model as that used on the lifting mechanism must be added to the suspension of the suspension platform. Each safety wire rope must be equipped with a safety lock that cannot be automatically reset. 9.3.2 The safety lock should be able to enable the platform to operate when the sliding speed is greater than 25m/min and stop within a distance not exceeding 1100mm.
9.3.3 The action of the safety lock should be sensitive and reliable, and it must be strictly inspected and tested. Unqualified products are not allowed to be assembled and used. The safety lock must be used within the validity period. If it exceeds the validity period, it can only be used after being tested and qualified by a professional factory. 9.1 The hanging basket must be equipped with an anti-tilt device. 9.5 An overload protection device should be installed on the hanging basket.
10 Requirements for wire ropes
10.1 Selection of wire ropes
Wire ropes should be selected according to the operating conditions and the breaking tensile force S of the wire ropes. The selected wire ropes must meet the requirements of GB8902 for climbing type and GB1102 for lifting type, and the product performance certificate must be kept. a: The type, specification and length of the wire rope used for the hanging basket should be clearly stated in the instructions; b: Under any circumstances, the actual diameter of the load-bearing wire system should not be less than 6mm. 10.2 Determination of wire shrinkage safety factor
The safety factor of wire joints shall be determined according to the following formula, but the safety factor shall not be less than 9. S·
Safety factor;
S—Rated breaking force of a single load-bearing wire rope, KN; 4—Number of load-bearing wire ropes;www.bzxz.net
W includes the deadweight and rated load of the hanging platform, lifting mechanism and electrical system, etc. 10.3 The fixing of wire ropes
shall comply with the provisions of GB 514.
10.4 It is not allowed to lengthen or repair by connecting two or more wire ropes. r 4a
Construction safety points
10.5 Inspection of wire rope
10.5.1 The operator shall inspect all visible parts of the wire, the parts where the wire rope is connected to the equipment, the wire rope drawn from the fixed end and the rope end fixing device at any time. 10.5.2 Inspection cycle
For the wire rope used for lifting, it shall be inspected at least twice a month after use and shall comply with the provisions of 2.4.1 of GB6972.
10.5. 3 Inspection parts
The entire working length of the wire rope must be inspected. At the same time, the wire rope sections passing through the pulley or drum, other contact surfaces and those wound forward and backward must also be carefully inspected. The wire rope near the end joint should be carefully inspected and shall comply with the provisions of 2.4.2 of GB5972.
10.5.4 Inspection of wire ropes on idle equipment When the equipment has been idle or out of service for more than one month, the wire ropes shall be thoroughly inspected before the equipment is used. 10.6 Wire rope scrapping
Comply with the provisions of GB 59722.5.
11 Requirements for suspension mechanisms
11.1 The structural parts of the suspension mechanism must be made of steel or other suitable metal structural materials, and can be connected by welding, riveting or bolting. The structure should have sufficient strength and rigidity. 11.2 The load-bearing components of the suspension mechanism must be quality inspected to ensure that they meet the design requirements. 11.3 The forces applied by the suspension mechanism to the supports of buildings or structures shall meet the load-bearing requirements of the building structure. 12 Counterweight requirements
12.1 The suspended structure or roof trolley must be equipped with appropriate counterweights 12.2 The counterweight should be accurately and firmly installed at the designated point, and the counterweight should be of sufficient quality as specified in the drawing. Before the suspended basket is used, it must be verified by the safety inspector that it can be used safely 12.3 The anti-overturning coefficient is equal to the ratio of the counterweight moment to the forward moment, and the ratio shall not be less than 2. The following figure 611
In the formula, K is the anti-overturning coefficient:
F is the sum of the masses of the suspended basket platform, lifting mechanism, electrical system, steel wire, rated load, etc., kg; G is the mass of the counterweight of a mouse, k!
The distance from the center of the heavy steel wire rope to the fulcrum, m;a
α—-The distance from the center of the distribution to the fulcrum, Ⅲ13 Requirements for electrical systems
13.1 The main components of the distribution system should be installed in the distribution control box and assembled on the insulating board, and must be insulated from the outer shell of the electrical control box. Its resistance value shall not be less than 0.5MQ. The power cable of the product shall be protected to prevent accidental contact, and shall be used separately, and a fuse shall be installed. 13.2
Switch.
Electrical control box shall have waterproof measures. The electrical system of the hanging cluster shall have reliable zero connection. The electrical components selected in the electrical system must be flexible and reliable, and the rated voltage of the portable electric tools used on the product shall not exceed 220V, and there shall be a reliable connection to the electrical system. The distribution system leakage protector. Bearing requirements for the support of buildings or structures The support of buildings or structures should be able to support the entire load of the hanging. 15 Other requirements
15.1 The operators on the suspended platform must wear safety belts, which are allowed to be connected to the suspended platform! 15.2 The operators on the suspended platform must strictly abide by the operating procedures, and it is strictly forbidden to use it beyond the line. 15.3 When the platform moves along the outer wall and needs to be guided by the guide components, such components should be installed on the outer wall. The outer wall components should enable the operators in the suspended platform to safely approach the parts where the operation is required, and the operators should not be left in the air.
15.4 In order to ensure the safety of the public, warning fences or protective measures must be set up around the suspended platform operation area, and signs should be attached.
15.5 The manufacturer has the obligation to train the installation, operation, maintenance and maintenance personnel of the user unit. Additional remarks:
The standard is proposed by the Standard and Quota Research Institute of the Ministry of Construction of the People's Republic of China. 4? 3-. . .
生装谢准供息
This standard is under the jurisdiction of Beijing Jianyun Machinery Research Institute, the technical unit responsible for mechanical equipment and vehicle standards of the Ministry of Construction. This standard was drafted by Shanghai Housing Management Science and Technology Research Institute and Beijing Construction Engineering Research Institute. The main drafters of this standard are Fu Qie, Shi Lili, Zhou Chengxian, Guan Jinfa. This standard is entrusted to Shanghai Housing Management Science Research Institute for interpretation.
生装谢准供息
This standard is under the jurisdiction of Beijing Jianyun Machinery Research Institute, the technical unit responsible for mechanical equipment and vehicle standards of the Ministry of Construction. This standard was drafted by Shanghai Housing Management Science and Technology Research Institute and Beijing Institute of Building Engineering. The main drafters of this standard are Fu Qie, Shi Lili, Zhou Chengxian, Guan Jinfa. This standard is entrusted to Shanghai Housing Management Science Research Institute for interpretation.
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