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Mechanical Industry Standard of the People's Republic of China
JB/T 1114--94
Manual Beam Crane
Published on 1994-07-18
Ministry of Machinery Industry of the People's Republic of China
Implementation on 1995-07-01
Mechanical Industry Standard of the People's Republic of China
Manual Beam Crane
1 Subject Content and Scope of Application
JB/T 1114-94
Replaces JB 111468
This standard specifies the types and basic parameters, technical requirements, test methods, inspection and measurement of manual beam cranes (hereinafter referred to as cranes).
This standard applies to cranes with a rated lifting capacity of 1 to 10 tons: the working level does not exceed A1; and are driven by manpower on the ground by hand-pulling chains.
2 Reference standards
GB 783
GB1348
GB3323
GB5905
GB 8923
GB9286
GB9439
GB 10095| | tt | 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 capacity series for lifting machinery
Ductile iron castings
Radiography and quality classification of steel fusion welded butt jointsCrane test specifications and procedures
General-purpose bridge cranes Limit dimensions
Surface rust grade and rust removal grade of steel before painting Cross-cut test of paint and varnish film
Grey cast iron castings| |tt||Involute cylindrical gear
Tolerances for manufacturing and rail installation of bridge and gantry cranesManual ultrasonic testing methods and test results for steel weldsGeneral engineering cast carbon steel parts
Welding quality assuranceRequirements and defect classification for steel fusion welded jointsSignages
General technical conditions for packaging of electromechanical products
Painting colors and safety signs for mining, engineering, lifting and transportation machinery productsManual 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
Implementation on July 1, 1995
3.1.2 Model representation method
3.1.3 Marking example
JB/T 1114-94
S-Span W-Trolley base distance
Lifting height, m
Span, m
Rated lifting capacity (hereinafter referred to as lifting capacity), tProduct code
A crane with a lifting capacity of 5t, a span of 10.5m and a lifting height of 3m should be marked as: Crane SL5-10.5-3JB/T1114—943.2 Basic parameters
3.2.1 The lifting capacity of the crane (code: Gn, unit: t) shall comply with the following provisions: 1, 2, 3.2, 5, 10.
3.2.2 The span of the crane (code: S. Unit: m) shall comply with the following provisions: 6, 7.5, 910.5, 13.5.
3.2.3 The lifting height of the crane (code: H, unit: m) shall comply with the provisions of Table 1. Table 1
Lifting weight t
Lifting height n
3.3 Limit dimensions
The maximum structural dimensions of the crane shall comply with the limit dimensions requirements in GB7592. 4 Technical requirements
4.1 Working conditions
4.1.1 The installation of the crane running track shall comply with the requirements of GB10183. 4.1.2 The working environment temperature of the crane shall not be lower than -25℃. 4.2 Performance
4.2.1 The lifting capacity of the crane shall reach the rated lifting weight. 4.2.2 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. 2
Wherein:
Additional resistance coefficient, k=1.2;
Gn—rated lifting capacity, kg,
JB/T 1114-94
9. 8k(Gn + g)(μd + 2f)www.bzxz.net
9——Mass of the crane, kg;
Rolling bearing friction coefficient, 4-0.015;
Inner diameter of wheel rolling bearing, mm
Rolling friction coefficient of the wheel along the running track, f-0.3: i——Gear reduction ratio
Dh-Hand chain wheel pitch circle diameter, mm:
Measured average hand pull force, N.
4.2.3The vertical static deflection caused by the rated lifting weight and the deadweight of the trolley in the middle of the main beam span shall not exceed S/400.4.2.4
The hand-pulling force of each mechanism shall comply with the following provisions: The hand-pulling force of the lifting mechanism shall comply with the relevant provisions in JB/T.7334; The hand-pulling force of the trolley running mechanism shall comply with the relevant provisions in 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
4.3 Materials and heat treatment
4.3.1The materials of the main components of the metal structure shall comply with the provisions of GB700, and 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
4.3.2The material of the wheel shall not be less than HT200 grey cast iron in GB9439, and the heat treatment hardness of its tread shall be 170~240HB. 4.3.3The material of the large gear shall not be less than QT500-7 ductile iron in GB1348 or ZG340-640 cast steel in GB11352.
4.3.4The material of the wheel shaft, gear shaft and driving gear shall not be less than 45# steel in GB699. 4.3.5The material of the hand chain wheel shall not be less than HT200 grey cast iron in GB9439. 4.4
Main components
4.4.1 The transmission gear of the running mechanism shall not be lower than Grade 10 specified in GB10095. 4.4.2 The circular runout on the end face of the base thrust after the wheel is installed shall comply with the provisions of Table 4. Table 4
Wheel diameter
Circular runout on the end face
4.4.3 The tolerance of the wheel tread diameter shall not be lower than h9. 200-315
>315-630
JB/T1114-94
4.4.4 The hand chain shall comply with the relevant provisions of JB/T7334. 4.5 Welding
4.5.1 The welding rod, welding wire and welding flux used for welding components shall be compatible with the materials to be welded. 4.5.2 The welding quality of the outside of the weld shall not be lower than the grade requirements in GB/T12469 defect classification. 4.5.3 The butt welds of the flange plates and web plates in the tension zone of the main beam shall be inspected. The radiographic inspection shall not be lower than the level II specified in GB3323, and the ultrasonic inspection shall not be lower than the level II specified in GB11345. 4.6 Bridge
4.6.1 The main beam shall have an upward camber, and the upward camber at the mid-span shall be (0.9/1000~～1.4/1000)S. The maximum upward camber shall be controlled within the range of S/10 symmetrical to the 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. 4.6.3 The vertical deflection of the main beam shall not be greater than h/100 of the beam height (see Figure 2). Figure 2
4.7 Assembly
4.7.1 The limit deviation △S of the crane span S shall comply with the following provisions (see Appendix A for span test conditions): When S≤10.5m, As=±5mm;
When S>10.5 m, 4S≤±[5+0.25(S-10)]mm. 4.7.2 When the wheels are suspended (see Appendix A), the axis deviation value α of the crane wheel on the vertical plane shall not be greater than 1/200, and the upper edge of the wheel end face shall be biased to the outside (see Figure 3). 4.7.3 The horizontal deflection value e of the crane wheel shall not be greater than 5/300, and the deflection directions of the two wheels on the same axis shall be opposite (see Figure 4.
4.7.4 The position difference of the wheels on the same end beam should not exceed 2mm, Figure 4
4.7.5 The diagonal difference of the bridge frame, the measured value from the reference point of the wheel installation 1S1-S2l≤5mm (see Figure 5). 4.7.6 The height difference of the crane wheel support point should not exceed 0.0015W. When the flange plate on the end beam is used as the detection reference, the flatness of the reference surface is not greater than 1mm, and the leveling conditions are shown in Appendix A. The height difference after rounding and simplification can be selected according to Table 5. 4.7.7 After the assembly of each mechanism, when the sprocket is turned by hand to make the last shaft rotate one circle, it should rotate flexibly, and there should be no abnormal phenomena such as jamming, loosening, and tightening in time.
Height difference
4.8 Safety
JB/T1114-94
4.8.1 The operating mechanism of the crane should be equipped with a track cleaning plate, a buffer and a stopper. >2.3~2.7
4.8.2 The safety rules for the use of the hoisting mechanism (hand chain hoist) of the crane shall comply with the provisions of ZBJ80015. 4.9 Appearance
4.9.1 The steel of the main components shall be rust-free before painting, and shall meet the requirements of Sa212 or St3 specified in GB8923, and the secondary components shall meet Sa2 or St2. 4.9.2 The crane topcoat shall be uniform, fine, bright, complete and color-matched, and shall not have defects such as roughness, paint leakage, wrinkles, pinholes and severe sagging.
The total thickness of the paint dry film is 75~105μm, of which the thickness of each layer is 25~35μm. 4.9.3
4.9.4 The adhesion of the paint film shall meet the grade quality requirements specified in GB9286. 4.9.5 The paint color shall generally meet the requirements of JB2299. 5 Test methods
The crane test shall comply with the specifications and procedures specified in GB5905. 5.1 Visual 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 connectors; 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
The main performance and basic parameters of the lifting mechanism (hand chain hoist) shall comply with the provisions of this standard and JB/T7334: The main performance and basic parameters of the trolley running mechanism (hand chain monorail trolley) during linear operation shall comply with the provisions of JB/T7332 5
JB/T 1114-94
c. Determination of transmission machinery 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 4.2.2. The efficiency value shall comply with the provisions of this article. The determination of hand pull force is detailed in item e of this article; d. The vertical static deflection of the main beam mid-span shall comply with the provisions of Article 4.2.3. See Article 5.3.1 for the test method; e. The hand-pulling force can be measured by the sensor method or the magnetic code method. When the sensor method is used, the sensor must be calibrated. When the base code method is used, the crane should hang a code on one side of its hand-pulling chain under the rated load, and gradually increase the brick code in small amounts until the static friction is overcome and the crane is slowly driven to move. At this time, the weight of the code 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 4.2.4. 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 loaded to 1.25G, lifted to 100~200mm from the ground, and the suspension time is not less than 10min, and then the load is unloaded, and this is repeated 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. 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 shall generally be carried out separately. The test load is 1.1G. The cumulative running distance of each mechanism shall comply with the provisions of Table 6.
Mechanism name
Distance mm
Number of positive and negative
Trolley operation
Full range
Car operation
≥500
After each mechanism completes its functional test, it is found that there is no looseness in the connection and no damage to the mechanism or components is found. The test is qualified. 6 Inspection rules
6.1 Factory inspection
6.1.1 Each crane shall be inspected before delivery. The inspection contents 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 vacant, 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 inspect the products item by item according to the product drawings and this standard. The products shall be shipped only after they have passed the inspection. The products shipped shall be issued with a product certificate of conformity to the user. 6.2 Type inspection
6.2.1 Type inspection shall generally be carried out in any of the following situations: Group. Trial and final product identification for new products or old products transferred to the factory for production;. During formal production, sampling inspection shall be carried out in accordance with the provisions of Table 7; 6
Total number of units produced per month
Number of units sampled every six months
JB/T 1114-94
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 stopped for more than two years and then resumes production. 6.2.2 Type inspection items include factory inspection and all test contents specified in Chapter 5. 6.2.3 If the manufacturer does not have the conditions to conduct type inspection, the type inspection shall be carried out at the user's site. 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. At the same time, the product's lifting weight and span size shall be considered for deployment so that it can gradually reach the assessment of the entire series. 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: Wang,
Rated lifting capacity:
Name, brand or trademark of the manufacturer.
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. 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's brand name.
The packaging of the crane shall comply with the relevant provisions of GB191 and GB/T13384. 7.3
The following documents should be placed in the crane's packaging box:7.4
Product certificate of conformity;
Product use and maintenance instructions:
Packing list;
Installation drawing:
Consumable parts drawing:
Other relevant technical documents.
Warranty period
The manufacturer should guarantee that the supplied crane can work normally 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. A1 Bridge test conditions
JB/T1114—94
Appendix A
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 (vertices of the wheel support center) on the upper flange plate of the bridge end beam and level them. The error should not exceed 3mm in the span direction and 2mm in the base distance direction.
A1.3 The bridge 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 and the pulling force is 150N. Deduct the correction value listed in Table A1 due to the deadweight of the steel wire from the measured value, which is the actual camber of the main beam. Table Al
Span s
>7. 5 ~10. 5
>10. 5~13. 5
Span test conditions
A2.1 The tension value and correction value used to measure the span are shown in Table A2. Table A2
Steel tape cross section
Span s
10. 5~~13. 5
Tension value
Correction value
Correction value
A2.2 The temperature of the steel tape and the bridge frame should be consistent during measurement. The steel tape should sag naturally and should not swing. mm
A2.3 The 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 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. 8
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