Some standard content:
ICS47.020.40
Machinery Industry Standard of the People's Republic of China
JB/T9019.1~9019.21999
Screw Hoist
Headstock gears with screw stem
Published on 1999-06-28
National Machinery Industry Bureau
Implemented on 2000-01-01
JB/T9019.2—1999
This standard is a revision of ZBJ86001.2—89 "Technical Conditions for Screw Hoist". During the revision, the original standard was edited. Except for deleting the provisions on the first overhaul period of the hoist, the other main technical contents remained unchanged. This standard replaces ZBJ86001.2—89 from the date of implementation. This standard is proposed and managed by the Beijing Hoisting and Conveying Machinery Research Institute. The responsible drafting unit of this standard is Shijiazhuang Mining Machinery Research Institute. The main drafters of this standard are Yu Jichang and Cui Zhenyuan. 1 Scope
Machinery Industry Standard of the People's Republic of China
Technical Conditions for Headstock Gears
Specification for Headstock Gears with Screw StemJB/T 9019.2—1999
Replaces ZBJ86001.2—89
This standard specifies the technical requirements, test methods and inspection rules as well as marking, packaging and other requirements for screw-type headstock gears. This standard is applicable to screw-type headstock gears (hereinafter referred to as headstock gears) for opening and closing plane gates in water conservancy, hydropower and urban water supply and drainage projects. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB 191—1990
GB/T 699—1988
GB/T 700—1988
GB/T 1176—1987
GB/T 1184-1996
GB/T 18011979
GB/T 5796.1~579 6.4-1986
GB/T 8923—1988
GB/T 9439---1988
GB/T 10089—1988
GB/T 10095—1988
GB/T 11365—1989
GB/T 133061991
GB/T13384—1992
JB/T 9019.1—1999
3 Technical requirements
Packaging, storage and transportation pictorial symbols
Technical conditions for high-quality carbon cable structural steel
Carbon structural steel
Technical conditions for cast copper alloys
Shape and position tolerances without tolerance values
Tolerances and matching dimensions to 500mm holes, shaft tolerance zones and matching trapezoidal threads
Surface rust grade and rust removal grade of steel before painting Grey cast iron parts||tt| |Cylindrical worm gear accuracy
Involute cylindrical gear accuracy
Bevel gear and hypoid gear accuracy
General technical conditions for packaging of electromechanical products
Types and basic parameters of screw-type gate hoists
3.1 The transmission form of gate hoists is generally worm transmission or bevel gear transmission. The lifting form allows various structural forms such as screw lifting and nut lifting. Its type and basic parameters should comply with the provisions of JB/T9019.1. 3.2 Performance
3.2.1 The hoist structure should have the following functions: a) The gate can be opened and closed manually when the power is off, and the manual and electric modes should be interlocked: b) When the gate opening force is greater than or equal to 100kN, an overload limiter should be installed, and when it is less than 100kN, it is also advisable to install it; Approved by the State Machinery Industry Bureau on June 28, 1999, and implemented on January 1, 2000
c) There is a gate height indicator:
d) There is a travel limiter:
e) The double-hanging point hoist can run synchronously.
Past: Manual hoists are not subject to the above restrictions. JB/T9019.2-1999
3.2.2 For remote-controlled gate hoists, in addition to complying with the above provisions, the following requirements shall also be met: a) Have a logical control function that is compatible with the remote control equipment; b) The reducer shall be lubricated with thin oil;
c) The transmission (excluding the screw pair) and the electrical parts shall have good anti-li and dustproof sealing measures. 3.2.3 The mechanical plus T dimension tolerance of the gate hoist shall not be lower than the ITg grade in GB/T1801--1979, the tolerance grade without tolerance shall not be lower than the m grade (medium grade) in GB/T1804, and the final tolerance of the shape and position tolerance shall not be lower than the C grade in GB/T1184-1996.
3.2.4 The straightness of the busbar of the explosion rod is 1000:1. When the total length does not exceed 5m, it shall not exceed 3mm; when the total length is greater than 5m but not more than 10m, it shall not exceed 5mm.
3.2.5 The trapezoidal threads of the screw and nut shall comply with the provisions of GB/T5796.1~5796.4, and the thread tolerances shall be 9C and 9H3.2.6 The precision of the bevel gear shall not be lower than the 9-Dc grade in GB/T11365-1989. 3.2.7 The precision of the cylindrical gear shall not be lower than the 998 grade in GB/T10095--1989. 3.2.8 The precision of the worm and worm wheel shall not be lower than the 8-Dc grade in GB/T10089-1988. 3.3 Safety and Health
3.3.1 The action setting value of the overload limiter shall meet the following requirements: a) When rising, it shall be 1.1 times the rated door opening force; b) When falling, it shall be 1.05 times the rated door closing force. 3.3.2 The comprehensive error of the overload limiter shall not be greater than 8% of the setting value. 3.3.3 The position repeatability deviation of the travel limiter shall not exceed +5mm. 3.3.4 The sound pressure level of the gate hoist shall not exceed 85dB(A) (except for manual ones) 3.3.5 The electrical control part of the gate hoist shall be rainproof, the body shall be reliably grounded, and have good contact with the zero position center line of the power supply. 3.3.6 The belt drive part of the gate hoist shall have a protective cover. 3.4 Assembly of the whole machine
After the whole machine is assembled, the handle should rotate flexibly and freely, and there should be no oil leakage at the joint of the reducer. 3.5 Pretreatment and painting
The pretreatment of steel should reach the St2 level specified in GB/T8923--1988. The choice of paint color should be bright and eye-catching. 3.6 Materials
3.6.1 The main parts of the manual gate hoist shall be made of materials with mechanical properties not lower than those specified in Table 1. Table 1
Parts Name
Nuts, gears
Material Brand
Standard CodewwW.bzxz.Net
GB/T_700
GB/T 9439
JB/T9019.2—1999
3.6.2Main parts of electric gate hoist shall be made of materials with mechanical properties not lower than those specified in Table 2. Table 2
Parts Name
3.7The scope of product set generally includes:
Material Brand
ZCuA110Fe3
a) Complete set of mechanical parts of gate hoist (including anchor bolts); b) Motor and electronic control equipment:
c) Special tools and spare parts necessary for operation and maintenance: d) Random documents.
4 Test method
Standard code
GB/T699
GB/T9439
GB/T 1176
GB/T699
GB/T 9439
4.1 The instruments, meters and other measuring tools used for the gate hoist test must be within the validity period of the verification qualification. 4.2 The various tests of the gate hoist should generally be carried out at the manufacturer, or at the project site according to the contract. 4.3 Test items
For door opening force ≤100kN
For door opening force>100kN
4.3.1 No-load test: Carry out no-load test operation of the installed gate hoist in forward and reverse directions on the test bench, with the cumulative time not less than 30 minutes. There should be no abnormal sound in the transmission system during operation. 4.3.2 Static load test: Load the gate hoist to the rated load on the test bench, then lift it to a height of 100~200mm above the ground, and then gradually load it to a test load equivalent to 1.25 times the rated gate opening force, with the suspension time not less than 10 minutes. After unloading, check that the main load-bearing parts are free of cracks and permanent deformation, and that the joints are free of looseness or damage. 4.3.3 Dynamic load test: Load the gate hoist to the rated load on the test bench, then lift it to a height of 100~200mm above the ground, and then gradually load it to a test load equivalent to 1.25 times the rated gate opening force, with the suspension time not less than 10 minutes. After unloading, check that the main load-bearing parts are free of cracks and permanent deformation, and that the joints are free of looseness or damage.Under the test load of 15 times the rated door opening force, the hoist shall be operated reciprocatingly throughout the working cycle for a cumulative period of not less than 1 hour. During the test, check that the movements of each mechanism should be flexible, stable and reliable. After the test, check that there should be no cracks, deformations or loose connections on the parts, and the motor and electronic control equipment should not overheat. 4.3.4 Use a pin tape to check the position repeatability deviation of the travel limiter, measure more than 3 times and take the average value, which should comply with the provisions of 3.3.3. 4.3.5 Adjust the overload limiter according to the requirements of 3.3.1, repeat the loading in the forward and reverse directions for more than 3 times, and the comprehensive error should comply with the provisions of 3.3.2. 4.3.6 Noise measurement: The hoist lifts the rated load in a non-enclosed room, and the four points in front, back, left and right at an equal distance of 1m from the sound source are measured with a sound level meter according to the A-level reading. Excluding the peak value of the pulse sound, the difference between the total noise and the background noise should be greater than 3dB (A), and the total noise minus the background noise correction (see Table 3) is the actual noise of the hoist. Table 3
Difference between total noise and background noise
Background noise correction
JB/T9019.21999
4.3.7 Door closing force test: When the screw of the gate hoist is in full length, use the manual device to gradually load it to 1.05 times the rated door closing force, and keep it for 3 minutes. After unloading, check the media rod and related force-bearing parts, and there should be no permanent deformation. 5 Inspection rules
5.1 Factory inspection
Products can only be shipped after being inspected and qualified by the quality inspection department of the manufacturer. Factory inspection is divided into unit-by-unit inspection and sampling inspection, and the number of sampling inspections shall be in accordance with the provisions of Table 4.
Annual production of maximum units
Number of inspections
5.1.1 The items for product inspection are as follows: 100
a) Appearance quality shall be inspected in accordance with the requirements of 3.5; b) No-load test shall be inspected in accordance with the requirements of 4.3.1; c) Conformity inspection shall be carried out in accordance with the order contract; d) Completeness inspection shall be carried out in accordance with 3.7.
5.1.2 The items for product sampling inspection are as follows: a) Static load test shall be carried out in accordance with the requirements of 4.3.2; b) Inspection of the action setting value of the overload limiter shall be carried out in accordance with 4.3.5; c) Inspection of the travel limiter shall be carried out in accordance with the requirements of 4.3.4. 50~<100
5.1.3 For products sampled for delivery, if one of the inspection items fails, the unqualified items shall be doubled in the same batch of products. If there are still unqualified items, the batch of products shall be inspected one by one. 5.2 Type inspection
5.2.1 Type inspection shall be conducted in any of the following cases: a) Trial production of new products or trial production of old products in factory production; b) After formal production, if there are major changes in structure, materials and processes that may affect product performance; c) It should be conducted once a year during normal production; d) When the product is stopped for a long time for more than one year and production is resumed; e) When the national quality supervision agency puts forward type inspection requirements. 5.2.2 The inspected products of normal production shall be sampled according to one thousandth of different types, but shall not be less than one unit. The sampled products shall be randomly sampled by the quality inspection department.
5.2.3 Type inspection items generally include:
a) All items included in factory inspection:
b) Dynamic load test shall be carried out in accordance with the requirements of 4.3.3: c) Noise measurement shall be carried out in accordance with the requirements of 4.3.6 d) Door closing force test shall be carried out in accordance with the requirements of 4.3.7. 6 Marking, packaging and storage
JB/T9019.2—1999
6.1 Each gate hoist shall be provided with a sign in a conspicuous position. The size and technical requirements of the sign shall comply with the provisions of GB/T13306. 6.2 The content of the sign shall include:
a) manufacturer's name;
b) product name;
c) product model or mark;
d) manufacturing date or production batch number;
e) main product parameters.
6.3 The screws of the gate hoists leaving the factory shall be packaged separately, and protective measures shall be taken to prevent damage, deformation and rust during storage and transportation. 6.4 Ordinary lever gate hoists are generally shipped from the factory in bare pieces, and anti-rust agent is applied to the exposed processed surface. They can also be shipped in boxes according to the contract. 6.5 The remote-controlled gate hoist should generally be packed in boxes before leaving the factory, and the packaging should comply with the provisions of GB/T13384 and GB191. 6.6 The random documents of the gate hoist include:
a) Product certificate;
b) Product operation and maintenance instructions:
e) Packing list.
Random documents should be packaged in moisture-proof packaging.
6.7 The gate hoist should be stored in a room without corrosive media. 7 Quality assurance period
Under the condition that the user complies with the installation and use rules of the product, within 12 months from the date of use but not more than 18 months from the date of shipment, if it cannot work normally due to poor manufacturing quality, the manufacturer shall repair or replace it for the user free of charge. 126 Documents accompanying the gate hoist include:
a) Product certificate;
b) Product use and maintenance instructions;
e) Packing list.
Documents accompanying the gate hoist shall be packaged in a moisture-proof package.
6.7 The gate hoist shall be stored in a room without corrosive media. 7 Warranty period
If the user complies with the installation and use rules of the product, within 12 months from the date of use but not more than 18 months from the date of delivery, if it cannot work properly due to poor manufacturing quality, the manufacturer shall repair or replace it for the user free of charge. 126 Documents accompanying the gate hoist include:
a) Product certificate;
b) Product use and maintenance instructions;
e) Packing list.
Documents accompanying the gate hoist shall be packaged in a moisture-proof package.
6.7 The gate hoist shall be stored in a room without corrosive media. 7 Warranty period
If the user complies with the installation and use rules of the product, within 12 months from the date of use but not more than 18 months from the date of delivery, if it cannot work properly due to poor manufacturing quality, the manufacturer shall repair or replace it for the user free of charge. 12
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