Some standard content:
Machinery Industry Standard of the People's Republic of China
JB/T 3775--94
Manually operated beam suspension crane
Issued on July 18, 1994
Ministry of Machinery Industry of the People's Republic of China
Implementation on July 1, 1995
Machinery Industry Standard of the People's Republic of China
Manually operated beam suspension crane
1 Subject content and scope of application
JB/T 3775 --- 94
Replaces JB3775-84
This standard specifies the types and basic parameters, technical requirements, test methods, inspection rules and other contents of manually operated beam suspension cranes (hereinafter referred to as cranes).
This standard applies to cranes with a rated lifting capacity of 0.5 to 3.2 t; working level not exceeding A1; working environment temperature not less than -25 (; driven by manpower on the ground by hand-pulling chains. Reference standards
GB3323
GB5905
GB8923
GB9286
GB9439
GB10095
GB11345
GB/T 12469
GB/T 13306
GB/T 13384
JB2299
JB/T7332
JB/T 7334
ZB J80 015
3 Types and basic parameters
3.1 Types
Packaging, storage and transportation pictorial symbols
Technical conditions for high-quality carbon structural steel
Carbon structural steel
Maximum lifting weight series for lifting machinery
Radiography and quality classification of steel fusion welded butt jointsTest specifications and procedures for cranes
Rust grade and rust removal grade of steel surface before paintingCross-cut test for paint and varnish film
Grey cast iron
Involute cylindrical gears
Manual ultrasonic flaw detection method for steel welds Method and flaw detection results classification welding quality assurance steel fusion welding joint requirements and defect classification signs
General technical conditions for packaging of electromechanical products
Mining, engineering, lifting and transportation machinery products paint colors and safety signs Manual monorail trolley
Hand chain hoist
Hand chain hoist safety rules
3.1.1 The structural type of the crane is shown in Figure 1. Approved by the Ministry of Machinery Industry on July 18, 1994
Implemented on July 1, 1995
3.1.2 Model representation method:
JBT 3775-94
S--span, — trolley base distance L-cantilever length lifting height, m
span, m
rated lifting capacity (hereinafter referred to as lifting capacity), product code
3.1.3 Marking example
Lifting capacity 21. A crane with a span of 9m and a lifting height of 10m should be marked as: Crane SLX2--9.-10JB/T3775-943.2 Basic parameters
3.2.1 The lifting capacity of the crane (code: G., unit: t) shall comply with the following provisions: 0.5.1.2.3.2.
3.2.2 The span of the crane (code: S, unit: m) shall comply with the following provisions: 3, 4.5.6.7.5+9.10.5.
3.2.3 The lifting height of the crane (code: H, unit: m) shall comply with the provisions of Table 1: Table 1
Lifting capacity
Lifting height
Cantilever length of crane
When the crane has a cantilever, its cantilever length is generally L1≤S/5*Technical requirements
Performance
3 ~ 12
JB/T 3775-94
4.1.1 The lifting capacity of the crane shall reach the rated lifting capacity. 4.1.2 The total transmission mechanical efficiency of the crane operating mechanism is determined by the following formula, and its calculated value should not be less than 0.76. 9. 8k(Gn + 9)(μd + 2f)
Wherein:
Attached resistance coefficient, =1.2;
Rated lifting capacity, kg;
Mass of the crane, kg;
Rolling bearing friction coefficient, p=0.015:
Inner diameter of wheel rolling bearing, mm;
Dynamic friction coefficient of the wheel along the running track, -0.3 gear reduction ratio:
Hand chain wheel pitch circle diameter, mm;
F. -Measured average hand pull force, N.
4.1.3 The vertical static caused by the lifting weight and the deadweight of the trolley in the middle of the main beam span shall not be greater than S/400.4.1.4 The hand-pulling force of each mechanism shall comply with the following provisions:a.
The hand-pulling force of the lifting mechanism shall comply with the provisions of JB/T7334: the hand-pulling force of the trolley running mechanism shall comply with the provisions of JB/T7332; the hand-pulling force of the trolley running mechanism shall comply with the provisions of Table 2. Table 2
Lifting weight
Hand-pulling force N
4.2 Materials
4.2.1 The materials of the main components of the metal structure shall comply with the provisions of GB700. The selection of grades shall not be lower than the requirements of Table 3 according to the conditions of use.
Working environment temperature
Steel grade
Not less than -20℃
Less than -20 ～ -25℃
Q235-B
4.2.2The material of wheels, wheel shafts, gear shafts and driving gears shall not be less than 45# steel in GB699. 4.2.3The material of hand chain wheels shall not be less than HT200 grey cast iron in GB9439. 4.3The hand chain shall comply with the relevant provisions in JB/T7334, 4.4The transmission gear of the operating mechanism shall not be less than Grade 10 specified in GB10095, welding
The welding rods, welding wires and flux used for welding components shall be compatible with the materials to be welded. 4.5.2The welding quality of the outside of the weld shall not be less than Grade III in the defect classification of GB/T12469. 4.5.3 The butt welds of the flange plate and web plate in the tension zone of the main beam shall be subjected to radiographic inspection, which shall not be lower than Grade 1 specified in GB3323, and shall not be lower than Grade II specified in GB11345 for ultrasonic inspection. 4.6 Bridge
4.6.1 The main beam shall have an camber, and the camber at mid-span shall be S/1000 ± 2mm. The maximum camber shall be controlled within the range symmetrical to S/10 at mid-span. For bridge inspection conditions, see Appendix A (Supplement). 4.6.2 The bending of the main beam in the horizontal direction shall not be greater than S/2000.3
4.7 Assembly
JB/T 3775--94
4.7.1 The limit deviation of the crane span S is △S = ± 6mm (see Appendix A for span inspection conditions). 4.7.2 The diagonal difference of the bridge, measured from the reference point of the wheel, 1S-S2l≤8mm (see Figure 2). 4.7.3 The span difference of the bridge, measured from the reference point of the wheel, 1S-S./≤6mm (see Figure 2). S
4.7.4 No gap is allowed between the track and the driving wheel tread. 4.7.5 The gap between the track and the tread of a driven wheel (or two paired wheels) should not be greater than 2mm when there is no load. 4.7.6 After the assembly of each mechanism, turn its sprocket by hand to make the last shaft rotate - circle. It should rotate flexibly. There should be no abnormal phenomenon such as jamming, loosening or tightening in time.
4.8 Safety
4.8.1 The operating mechanism of the crane should be equipped with a buffer and a stopper. 4.8.2 The safety rules for the use of the hoisting mechanism (hand chain hoist) of the crane should comply with the provisions of ZBJ80015. 4.9 Appearance
4.9.1 The steel of the main components shall be treated with surface rust removal before painting, and shall meet the requirements of Sa2 or St3 specified in GB8923; the secondary components shall meet Sa2 or St2. 4.9.2 The crane topcoat shall be evenly drawn, fine, bright, complete and consistent in color, and shall not have defects such as roughness, paint leakage, wrinkles, pinholes and severe sagging.
4.9.3 The total thickness of the paint dry film is 75~105μm. The thickness of each layer is 25~35μm. 4.9.4 The adhesion of the paint film shall meet the quality requirements of -~ level specified in GB9286. 4.9.5 The paint color shall generally meet the requirements of JB2299. 5 Test method
The test of the crane shall comply with the specifications and procedures specified in GB5905. 5.1 Self-test inspection
The visual inspection shall include whether the specifications and status of all important parts meet the requirements. Such as: the crane metal structure and its connecting parts; all protective devices, hand chain hoists and manual monorail trolleys; sprockets, hand chains and shaft end fixings.
The visual inspection shall also include checking whether the necessary certificates have been submitted and reviewed. 5.2 Qualification test
After 2~3 times of gradual loading to the rated lifting weight, start the test to verify whether the following items meet the requirements of this standard and design drawings:
JB/T3775-94
The main performance and basic parameters of the lifting mechanism shall comply with the provisions of JB/T7334: Continue,
b. The main performance and basic parameters of the trolley running mechanism during linear operation shall comply with the provisions of JB/T7332:c. Determination of transmission mechanical efficiency, measure the hand pull force on a track with a slope not exceeding 3/1000, and convert it according to the formula specified in Article 4.1.2. The efficiency value shall comply with the provisions of this article. For details on the determination of hand pull force, please refer to item e of this article:d. The vertical static excavation at the mid-span of the main beam shall comply with the provisions of Article 4.1.3. For the test method, please refer to Article 5.3.1;e. The determination of hand pull force can be determined by the sensor method or the brick code method. When measuring by the sensor method, the sensor must be calibrated. When measuring with the yard method, the crane should hang a yard on one side of its hand chain under the rated load, and gradually increase the yard in small amounts until the static friction is overcome and the crane is slowly driven to move. At this time, the weight of the yard hung is the hand pull force of the measured trolley. The hand pull force is measured three times and the average value is taken, and it should comply with the provisions of Article 4.1.4. The test method of the hand pull force of the trolley running mechanism and the lifting mechanism should comply with the provisions of relevant standards. 5.3 Load lifting capacity test
5.3.1 Static load test
Before the test, the unloaded trolley should be parked in the middle of the span, and the reference point should be determined on the main beam (the vertical static deflection is measured under the rated load).
The lifting mechanism is gradually loaded to 1.25G. Lift to 100~200mm above the ground, and the suspension time is not less than 10min, then unload the load, and repeat this three times. After the third unloading, the main beam shall not have permanent deformation. Then drive the trolley to the end of the span and check the actual camber of the main beam, which should not be less than 0.7S/1000.
After the test, check each component of the crane. There should be no cracks, permanent deformation, paint peeling or damage that affects the performance and safety of the crane, and the connection should not be loose or damaged. If the test is qualified. 5.3.2 Dynamic load test
The dynamic load test of each mechanism of the crane should generally be carried out separately. The test load is 1.1G, and the cumulative running distance of each mechanism should comply with the provisions of Table 4.
Mechanism name
Number of positive and negative movements
Trolley operation
Car operation
Electric lifting
After each mechanism completes its functional test, it is checked that there is no looseness in the connection and no damage to the mechanism or components is found, then the test is qualified. 6 Inspection rules
6.1 Factory inspection
6.1.1 Each crane shall be subject to factory inspection, and the inspection content shall include all items except the test contents specified in Articles 5.2 and 5.3 of Chapter 5 of this standard.
6.1.2 The crane shall be pre-installed at the manufacturer. 6.1.3 Idle operation test: During the test, the wheels of the crane shall be suspended, and the hand chain wheels of each mechanism shall rotate flexibly when turned by hand. 6.1.4 The quality inspection department of the manufacturer shall conduct item-by-item inspection according to the product drawings and this standard. Only after passing the inspection shall the product be allowed to leave the factory, and a product certificate of conformity shall be issued to the user for the product leaving the factory. 6.2 Type inspection
6.2.1 Type inspection shall generally be carried out when one of the following situations occurs: a. New products or old products are tested for trial production and identification in factory production; b. During formal production, sampling inspection shall be carried out in accordance with the provisions of Table 5; 5
Total number of units produced per month
Number of units sampled every six months
JB/T377S-94
After formal production, if there are major changes in structure, materials, processes, etc., which may affect the performance of the product; C
d. When the product is discontinued for more than two years and then resumed. 6.2.2 Type inspection items include factory inspection and all the contents specified in Chapter 5. 6.2.3 If the manufacturer does not have the conditions to conduct type inspection, type inspection shall be carried out at the user's site. >30
6.2.4 The cranes to be type inspected shall be designated by the manufacturer's quality inspection department or by the national quality supervision agency based on actual conditions and possibilities, and shall be adjusted taking into account the lifting weight and span size of the product so that it can gradually meet the assessment of the entire series. 7 Marking and packaging
7.1 Each crane shall have a tonnage plate fixed at a prominent position in the middle of the main beam. The tonnage plate shall indicate: a.Www.bzxZ.net
Rated lifting capacity;
Manufacturer name, factory logo or trademark.
7.2 Each crane shall have a sign fixed at a prominent position on one side of the main beam. The sign shall comply with the requirements of GB/T13306 and shall include:
Crane name;
Basic parameters of the crane;
Crane model or mark:
Crane factory number and manufacturing date: Manufacturer name.
7.3 The packaging of the crane shall comply with the relevant provisions of GB191 and GB/T13384. The following documents should be placed in the crane's packaging box: 7.4
Product certificate:
Product use and maintenance instructions;
Packing list;
Installation drawing:
Consumable parts drawing:
Other relevant technical documents.
8 Warranty period
The manufacturer should guarantee that the supplied crane can work properly within 12 months from the date of use (but not more than 18 months from the date of delivery) under the condition of proper storage, reasonable installation and correct use by the user. 6
AI Bridge test conditions
JB/T3775-94
Appendix Λ
Bridge and span test conditions
(Supplement)
A1.1 During the test, the support point of the bridge should be below the end beam, as close to the wheel position as possible. A1.2 Find four reference points on the upper flange plate of the bridge end beam (near the wheel support center) and level it. The error in the span direction shall not exceed 3nm. No more than 2mm in the wheelbase direction.
A1.3 The bridge frame should be measured without the influence of sunlight. A1.4 When measuring the camber of the main beam by pulling the steel wire, the diameter of the steel wire is 0.49~0.52mm. The pulling force is 150N. The correction value listed in Table A1 due to the influence of the deadweight of the steel wire is deducted from the measured value, which is the actual camber of the main beam. Table Al
Span S
>7.5-~10. 5
A2 Span test conditions
A2.1 The tension value and correction value used for span measurement are shown in Table A2. Table A2
Steel tape section
SpansmTension valueN
Correction value
A2.2During measurement, the steel tape and bridge frame temperature should be consistent, and the steel tape should sag naturally without swinging. mm
A2.3The reading on the measured steel tape plus the correction value listed in Table A2 and the measurement correction value of the steel tape (positive or negative) is the actual span of the crane.
Additional remarks:
This standard was proposed and managed by the Beijing Hoisting and Conveying Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Beijing Hoisting and Conveying Machinery Research Institute. The main drafters of this standard are Tao Li and Ma Jingdong. People's Republic of China
Machinery Industry Standard
Manual Beam Suspension Crane
JB/T 3775-9+
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Postal Code 1000813
(Box 8144, Beijing
Copyright reserved. No reproduction allowed
Copyright 880×12301.16 sheets3.4 units14.000Edition 1995-1
First printing in January 1995
Print 00.001-500Price 6.00 Yuan
No. 94--007The hand-pulling force can be measured by the sensor method or the brick-yard method. When the sensor method is used, the sensor must be calibrated. When the yard method is used, the crane should hang a yard on one side of its hand-pulling chain under the rated load, and gradually increase the yard in small amounts until the static friction is overcome and the crane is slowly driven to move. At this time, the weight of the yard hung is the hand-pulling force of the measured trolley. The hand-pulling force is measured three times and the average value is taken, and it should comply with the provisions of Article 4.1.4. The test method of the hand-pulling force of the trolley running mechanism and the lifting mechanism should comply with the provisions of the relevant standards. 5.3 Load lifting capacity test
5.3.1 Static load test
Before the test, the unloaded trolley should be parked in the middle of the span, and the reference point should be determined on the main beam (the vertical static deflection is measured under the rated load).
The lifting mechanism is gradually loaded to 1.25G. Lift to 100~200mm above the ground, and hang in the air for no less than 10min, then unload the load, and repeat this three times. After the third unloading, the main beam shall not have permanent deformation. Then drive the trolley to the span end and check the actual camber of the main beam, which shall not be less than 0.7S/1000.
After the test, check each component of the crane. There shall be no cracks, permanent deformation, paint peeling or damage that affects the performance and safety of the crane, and the connection shall not be loose or damaged. The test is qualified. 5.3.2 Dynamic load test
The dynamic load test of each mechanism of the crane should generally be carried out separately. The test load is 1.1G, and the cumulative running distance of each mechanism shall comply with the provisions of Table 4.
Mechanism name
Number of positive and negative movements
Trolley operation
Car operation
Electric lifting
After each mechanism completes its functional test, it is checked that there is no looseness in the connection and no damage to the mechanism or components is found, then the test is qualified. 6 Inspection rules
6.1 Factory inspection
6.1.1 Each crane shall be subject to factory inspection, and the inspection content shall include all items except the test contents specified in Articles 5.2 and 5.3 of Chapter 5 of this standard.
6.1.2 The crane shall be pre-installed at the manufacturer. 6.1.3 Idle operation test: During the test, the wheels of the crane shall be suspended, and the hand chain wheels of each mechanism shall rotate flexibly when turned by hand. 6.1.4 The quality inspection department of the manufacturer shall conduct item-by-item inspection according to the product drawings and this standard. Only after passing the inspection shall the product be allowed to leave the factory, and a product certificate of conformity shall be issued to the user for the product leaving the factory. 6.2 Type inspection
6.2.1 Type inspection shall generally be carried out when one of the following situations occurs: a. New products or old products are tested for trial production and identification in factory production; b. During formal production, sampling inspection shall be carried out in accordance with the provisions of Table 5; 5
Total number of units produced per month
Number of units sampled every six months
JB/T377S-94
After formal production, if there are major changes in structure, materials, processes, etc., which may affect the performance of the product; C
d. When the product is discontinued for more than two years and then resumed. 6.2.2 Type inspection items include factory inspection and all the contents specified in Chapter 5. 6.2.3 If the manufacturer does not have the conditions to conduct type inspection, type inspection shall be carried out at the user's site. >30
6.2.4 The cranes to be type inspected shall be designated by the manufacturer's quality inspection department or by the national quality supervision agency based on actual conditions and possibilities, and shall be adjusted taking into account the lifting weight and span size of the product so that it can gradually meet the assessment of the entire series. 7 Marking and packaging
7.1 Each crane shall have a tonnage plate fixed at a prominent position in the middle of the main beam. The tonnage plate shall indicate: a.
Rated lifting capacity;
Manufacturer name, factory logo or trademark.
7.2 Each crane shall have a sign fixed at a prominent position on one side of the main beam. The sign shall comply with the requirements of GB/T13306 and shall include:
Crane name;
Basic parameters of the crane;
Crane model or mark:
Crane factory number and manufacturing date: Manufacturer name.
7.3 The packaging of the crane shall comply with the relevant provisions of GB191 and GB/T13384. The following documents should be placed in the crane's packaging box: 7.4
Product certificate:
Product use and maintenance instructions;
Packing list;
Installation drawing:
Consumable parts drawing:
Other relevant technical documents.
8 Warranty period
The manufacturer should guarantee that the supplied crane can work properly within 12 months from the date of use (but not more than 18 months from the date of delivery) under the condition of proper storage, reasonable installation and correct use by the user. 6
AI Bridge test conditions
JB/T3775-94
Appendix Λ
Bridge and span test conditions
(Supplement)
A1.1 During the test, the support point of the bridge should be below the end beam, as close to the wheel position as possible. A1.2 Find four reference points on the upper flange plate of the bridge end beam (near the wheel support center) and level it. The error in the span direction shall not exceed 3nm. No more than 2mm in the wheelbase direction.
A1.3 The bridge frame should be measured without the influence of sunlight. A1.4 When measuring the camber of the main beam by pulling the steel wire, the diameter of the steel wire is 0.49~0.52mm. The pulling force is 150N. The correction value listed in Table A1 due to the influence of the deadweight of the steel wire is deducted from the measured value, which is the actual camber of the main beam. Table Al
Span S
>7.5-~10. 5
A2 Span test conditions
A2.1 The tension value and correction value used for span measurement are shown in Table A2. Table A2
Steel tape section
SpansmTension valueN
Correction value
A2.2During measurement, the steel tape and bridge frame temperature should be consistent, and the steel tape should sag naturally without swinging. mm
A2.3The reading on the measured steel tape plus the correction value listed in Table A2 and the measurement correction value of the steel tape (positive or negative) is the actual span of the crane.
Additional remarks:
This standard was proposed and managed by the Beijing Hoisting and Conveying Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Beijing Hoisting and Conveying Machinery Research Institute. The main drafters of this standard are Tao Li and Ma Jingdong. People's Republic of China
Machinery Industry Standard
Manual Beam Suspension Crane
JB/T 3775-9+
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Postal Code 1000813
(Box 8144, Beijing
Copyright reserved. No reproduction allowed
Copyright 880×12301.16 sheets3.4 units14.000Edition 1995-1
First printing in January 1995
Print 00.001-500Price 6.00 Yuan
No. 94--007The hand-pulling force can be measured by the sensor method or the brick-yard method. When the sensor method is used, the sensor must be calibrated. When the yard method is used, the crane should hang a yard on one side of its hand-pulling chain under the rated load, and gradually increase the yard in small amounts until the static friction is overcome and the crane is slowly driven to move. At this time, the weight of the yard hung is the hand-pulling force of the measured trolley. The hand-pulling force is measured three times and the average value is taken, and it should comply with the provisions of Article 4.1.4. The test method of the hand-pulling force of the trolley running mechanism and the lifting mechanism should comply with the provisions of the relevant standards. 5.3 Load lifting capacity test
5.3.1 Static load test
Before the test, the unloaded trolley should be parked in the middle of the span, and the reference point should be determined on the main beam (the vertical static deflection is measured under the rated load).
The lifting mechanism is gradually loaded to 1.25G. Lift to 100~200mm above the ground, and hang in the air for no less than 10min, then unload the load, and repeat this three times. After the third unloading, the main beam shall not have permanent deformation. Then drive the trolley to the span end and check the actual camber of the main beam, which shall not be less than 0.7S/1000.
After the test, check each component of the crane. There shall be no cracks, permanent deformation, paint peeling or damage that affects the performance and safety of the crane, and the connection shall not be loose or damaged. The test is qualified. 5.3.2 Dynamic load test
The dynamic load test of each mechanism of the crane should generally be carried out separately. The test load is 1.1G, and the cumulative running distance of each mechanism shall comply with the provisions of Table 4.
Mechanism name
Number of positive and negative movements
Trolley operation
Car operation
Electric lifting
After each mechanism completes its functional test, it is checked that there is no looseness in the connection and no damage to the mechanism or components is found, then the test is qualified. 6 Inspection rules
6.1 Factory inspection
6.1.1 Each crane shall be subject to factory inspection, and the inspection content shall include all items except the test contents specified in Articles 5.2 and 5.3 of Chapter 5 of this standard.
6.1.2 The crane shall be pre-installed at the manufacturer. 6.1.3 Idle operation test: During the test, the wheels of the crane shall be suspended, and the hand chain wheels of each mechanism shall rotate flexibly when turned by hand. 6.1.4 The quality inspection department of the manufacturer shall conduct item-by-item inspection according to the product drawings and this standard. Only after passing the inspection shall the product be allowed to leave the factory, and a product certificate of conformity shall be issued to the user for the product leaving the factory. 6.2 Type inspection
6.2.1 Type inspection shall generally be carried out when one of the following situations occurs: a. New products or old products are tested for trial production and identification in factory production; b. During formal production, sampling inspection shall be carried out in accordance with the provisions of Table 5; 5
Total number of units produced per month
Number of units sampled every six months
JB/T377S-94
After formal production, if there are major changes in structure, materials, processes, etc., which may affect the performance of the product; C
d. When the product is discontinued for more than two years and then resumed. 6.2.2 Type inspection items include factory inspection and all the contents specified in Chapter 5. 6.2.3 If the manufacturer does not have the conditions to conduct type inspection, type inspection shall be carried out at the user's site. >30
6.2.4 The cranes to be type inspected shall be designated by the manufacturer's quality inspection department or by the national quality supervision agency based on actual conditions and possibilities, and shall be adjusted taking into account the lifting weight and span size of the product so that it can gradually meet the assessment of the entire series. 7 Marking and packaging
7.1 Each crane shall have a tonnage plate fixed at a prominent position in the middle of the main beam. The tonnage plate shall indicate: a.
Rated lifting capacity;
Manufacturer name, factory logo or trademark.
7.2 Each crane shall have a sign fixed at a prominent position on one side of the main beam. The sign shall comply with the requirements of GB/T13306 and shall include:
Crane name;
Basic parameters of the crane;
Crane model or mark:
Crane factory number and manufacturing date: Manufacturer name.
7.3 The packaging of the crane shall comply with the relevant provisions of GB191 and GB/T13384. The following documents should be placed in the crane's packaging box: 7.4
Product certificate:
Product use and maintenance instructions;
Packing list;
Installation drawing:
Consumable parts drawing:
Other relevant technical documents.
8 Warranty period
The manufacturer should guarantee that the supplied crane can work properly within 12 months from the date of use (but not more than 18 months from the date of delivery) under the condition of proper storage, reasonable installation and correct use by the user. 6
AI Bridge test conditions
JB/T3775-94
Appendix Λ
Bridge and span test conditions
(Supplement)
A1.1 During the test, the support point of the bridge should be below the end beam, as close to the wheel position as possible. A1.2 Find four reference points on the upper flange plate of the bridge end beam (near the wheel support center) and level it. The error in the span direction shall not exceed 3nm. No more than 2mm in the wheelbase direction.
A1.3 The bridge frame should be measured without the influence of sunlight. A1.4 When measuring the camber of the main beam by pulling the steel wire, the diameter of the steel wire is 0.49~0.52mm. The pulling force is 150N. The correction value listed in Table A1 due to the influence of the deadweight of the steel wire is deducted from the measured value, which is the actual camber of the main beam. Table Al
Span S
>7.5-~10. 5
A2 Span test conditions
A2.1 The tension value and correction value used for span measurement are shown in Table A2. Table A2
Steel tape section
SpansmTension valueN
Correction value
A2.2During measurement, the steel tape and bridge frame temperature should be consistent, and the steel tape should sag naturally without swinging. mm
A2.3The reading on the measured steel tape plus the correction value listed in Table A2 and the measurement correction value of the steel tape (positive or negative) is the actual span of the crane.
Additional remarks:
This standard was proposed and managed by the Beijing Hoisting and Conveying Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Beijing Hoisting and Conveying Machinery Research Institute. The main drafters of this standard are Tao Li and Ma Jingdong. People's Republic of China
Machinery Industry Standard
Manual Beam Suspension Crane
JB/T 3775-9+
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Postal Code 1000813
(Box 8144, Beijing
Copyright reserved. No reproduction allowed
Copyright 880×12301.16 sheets3.4 units14.000Edition 1995-1
First printing in January 1995
Print 00.001-500Price 6.00 Yuan
No. 94--0072 The crane should be pre-installed at the manufacturer. 6.1.3 Idle operation test: During the test, the crane wheels should be emptied, and the hand chain wheels of each mechanism should rotate flexibly. 6.1.4 The quality inspection department of the manufacturer should conduct item-by-item inspections according to the product drawings and this standard. Only after passing the inspection can it be allowed to leave the factory, and the product should be issued with a product certificate of conformity to the user. 6.2 Type inspection
6.2.1 Type inspection should generally be carried out in any of the following situations: a. Trial determination and identification of new products or old products transferred to the factory for production; b. During formal production, sampling inspection shall be carried out in accordance with the provisions of Table 5; 5
Total number of units produced per month
Number of units sampled every six months
JB/T377S-94
After formal production, if there are major changes in structure, materials, processes, etc., which may affect the performance of the product; C
d. When the product is discontinued for more than two years and then resumes production. 6.2.2 Type inspection items include factory inspection and all the contents specified in Chapter 5. 6.2.3 If the manufacturer does not have the conditions to conduct type inspection, it should conduct type inspection at the user's site. >30
6.2.4 The cranes that undergo type inspection should be designated by the manufacturer's quality inspection department or by the national quality supervision agency based on actual conditions and possibilities. The product's lifting capacity and span size should also be considered for deployment so that it can gradually meet the assessment of the entire series. 7 Marking and packaging
7.1 Each crane should have a lifting capacity tonnage plate fixed at a conspicuous position in the middle of the main beam span. The tonnage plate should indicate: a.
Rated lifting capacity;
Manufacturer name, factory logo or trademark.
7.2 Each crane shall have a sign fixed on a conspicuous position on one side of the main beam. The sign shall comply with the requirements of GB/T13306 and the content of the sign shall include:
Crane name;
Basic parameters of the crane;
Model or mark of the crane:
Factory number and manufacturing date of the crane: Manufacturer name.
7.3The packaging of the crane shall comply with the relevant provisions of GB191 and GB/T13384. The following random documents shall be placed in the packaging box of the crane: 7.4
Product certificate of conformity:
Product use and maintenance instructions;
Packing list;
Installation drawing:
Consumable parts drawing:
Other relevant technical documents.
8 Warranty period
The manufacturer shall guarantee that the supplied crane can work properly within 12 months from the date of use (but not more than 18 months from the date of delivery) under the conditions of proper storage, reasonable installation and correct use by the user. 6
AI Bridge test conditions
JB/T3775-94
Appendix Λ
Bridge and span test conditions
(Supplement)
A1.1 During the test, the support point of the bridge should be below the end beam and as close to the wheel position as possible. A1.2 Find four reference points on the upper flange plate of the bridge end beam (near the wheel support center) and level it. The error in the span direction shall not exceed 3nm. No more than 2mm in the wheelbase direction.
A1.3 The bridge frame should be measured without the influence of sunlight. A1.4 When measuring the camber of the main beam by pulling the steel wire, the diameter of the steel wire is 0.49~0.52mm. The pulling force is 150N. The correction value listed in Table A1 due to the influence of the deadweight of the steel wire is deducted from the measured value, which is the actual camber of the main beam. Table Al
Span S
>7.5-~10. 5
A2 Span test conditions
A2.1 The tension value and correction value used for span measurement are shown in Table A2. Table A2
Steel tape section
SpansmTension valueN
Correction value
A2.2During measurement, the steel tape and bridge frame temperature should be consistent, and the steel tape should sag naturally without swinging. mm
A2.3The reading on the measured steel tape plus the correction value listed in Table A2 and the measurement correction value of the steel tape (positive or negative) is the actual span of the crane.
Additional remarks:
This standard was proposed and managed by the Beijing Hoisting and Conveying Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Beijing Hoisting and Conveying Machinery Research Institute. The main drafters of this standard are Tao Li and Ma Jingdong. People's Republic of China
Machinery Industry Standard
Manual Beam Suspension Crane
JB/T 3775-9+
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Postal Code 1000813
(Box 8144, Beijing
Copyright reserved. No reproduction allowed
Copyright 880×12301.16 sheets3.4 units14.000Edition 1995-1
First printing in January 1995
Print 00.001-500Price 6.00 Yuan
No. 94--0072 The crane should be pre-installed at the manufacturer. 6.1.3 Idle operation test: During the test, the crane wheels should be emptied, and the hand chain wheels of each mechanism should rotate flexibly. 6.1.4 The quality inspection department of the manufacturer should conduct item-by-item inspections according to the product drawings and this standard. Only after passing the inspection can it be allowed to leave the factory, and the product should be issued with a product certificate of conformity to the user. 6.2 Type inspection
6.2.1 Type inspection should generally be carried out in any of the following situations: a. Trial determination and identification of new products or old products transferred to the factory for production; b. During formal production, sampling inspection shall be carried out in accordance with the provisions of Table 5; 5
Total number of units produced per month
Number of units sampled every six months
JB/T377S-94
After formal production, if there are major changes in structure, materials, processes, etc., which may affect the performance of the product; C
d. When the product is discontinued for more than two years and then resumes production. 6.2.2 Type inspection items include factory inspection and all the contents specified in Chapter 5. 6.2.3 If the manufacturer does not have the conditions to conduct type inspection, it should conduct type inspection at the user's site. >30
6.2.4 The cranes that undergo type inspection should be designated by the manufacturer's quality inspection department or by the national quality supervision agency based on actual conditions and possibilities. The product's lifting capacity and span size should also be considered for deployment so that it can gradually meet the assessment of the entire series. 7 Marking and packaging
7.1 Each crane should have a lifting capacity tonnage plate fixed at a conspicuous position in the middle of the main beam span. The tonnage plate should indicate: a.
Rated lifting capacity;
Manufacturer name, factory logo or trademark.
7.2 Each crane shall have a sign fixed on a conspicuous position on one side of the main beam. The sign shall comply with the requirements of GB/T13306 and the content of the sign shall include:
Crane name;
Basic parameters of the crane;
Model or mark of the crane:
Factory number and manufacturing date of the crane: Manufacturer name.
7.3The packaging of the crane shall comply with the relevant provisions of GB191 and GB/T13384. The following random documents shall be placed in the packaging box of the crane: 7.4
Product certificate of conformity:
Product use and maintenance instructions;
Packing list;
Installation drawing:
Consumable parts drawing:
Other relevant technical documents.
8 Warranty period
The manufacturer shall guarantee that the supplied crane can work properly within 12 months from the date of use (but not more than 18 months from the date of delivery) under the conditions of proper storage, reasonable installation and correct use by the user. 6
AI Bridge test conditions
JB/T3775-94
Appendix Λ
Bridge and span test conditions
(Supplement)
A1.1 During the test, the support point of the bridge should be below the end beam and as close to the wheel position as possible. A1.2 Find four reference points on the upper flange plate of the bridge end beam (near the wheel support center) and level it. The error in the span direction shall not exceed 3nm. No more than 2mm in the wheelbase direction.
A1.3 The bridge frame should be measured without the influence of sunlight. A1.4 When measuring the camber of the main beam by pulling the steel wire, the diameter of the steel wire is 0.49~0.52mm. The pulling force is 150N. The correction value listed in Table A1 due to the influence of the deadweight of the steel wire is deducted from the measured value, which is the actual camber of the main beam. Table Al
Span S
>7.5-~10. 5
A2 Span test conditions
A2.1 The tension value and correction value used for span measurement are shown in Table A2. Table A2
Steel tape section
SpansmTension valueN
Correction value
A2.2During measurement, the steel tape and bridge frame temperature should be consistent, and the steel tape should sag naturally without swinging. mm
A2.3The reading on the measured steel tape plus the correction value listed in Table A2 and the measurement correction value of the steel tape (positive or negative) is the actual span of the crane.
Additional remarks:
This standard was proposed and managed by the Beijing Hoisting and Conveying Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Beijing Hoisting and Conveying Machinery Research Institute. The main drafters of this standard are Tao Li and Ma Jingdong. People's Republic of China
Machinery Industry Standard
Manual Beam Suspension Crane
JB/T 3775-9+
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Postal Code 1000813
(Box 8144, Beijing
Copyright reserved. No reproduction allowed
Copyright 880×12301.16 sheets3.4 units14.000Edition 1995-1
First printing in January 1995
Print 00.001-500Price 6.00 Yuan
No. 94--0072 During measurement, the steel tape and bridge frame should be at the same temperature, and the steel tape should droop naturally without swinging. mm
A2.3 The reading on the steel tape plus the correction value listed in Table A2 and the measurement correction value of the steel tape (positive or negative) is the actual span of the crane.
Additional Notes:
This standard was proposed and managed by the Beijing Hoisting and Conveying Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Beijing Hoisting and Conveying Machinery Research Institute. The main drafters of this standard are Tao Li and Ma Jingdong. People's Republic of China
Machinery Industry Standard
Manual Beam Suspension Crane
JB/T 3775-9+
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Postal Code 1000813
(Box 8144, Beijing
Copyright reserved. No reproduction allowed
Copyright 880×12301.16 sheets3.4 units14.000Edition 1995-1
First printing in January 1995
Print 00.001-500Price 6.00 Yuan
No. 94--0072 During measurement, the steel tape and bridge frame should be at the same temperature, and the steel tape should droop naturally without swinging. mm
A2.3 The reading on the steel tape plus the correction value listed in Table A2 and the measurement correction value of the steel tape (positive or negative) is the actual span of the crane.
Additional Notes:
This standard was proposed and managed by the Beijing Hoisting and Conveying Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Beijing Hoisting and Conveying Machinery Research Institute. The main drafters of this standard are Tao Li and Ma Jingdong. People's Republic of China
Machinery Industry Standard
Manual Beam Suspension Crane
JB/T 3775-9+
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Postal Code 1000813
(Box 8144, Beijing
Copyright reserved. No reproduction allowed
Copyright 880×12301.16 sheets3.4 units14.000Edition 1995-1
First printing in January 1995
Print 00.001-500Price 6.00 Yuan
No. 94--007
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.