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Mechanical Industry Standard of the People's Republic of China
Manual Monorail Trolley
1 Subject Content and Scope of Application
JB/T7332-94
This standard specifies the type, basic parameters, technical requirements, inspection rules, marking and packaging of manual monorail trolleys. This standard applies to manual monorail trolleys (hereinafter referred to as monorail trolleys) with a rated load of 0.5 to 32 tons, which are driven by hand-pulled chains or hand-pushed to hang heavy objects on the lower flange of the I-beam track. 2 Reference standards
GB706 Size, shape, weight and allowable deviation of hot-rolled I-beamsGB/T13306 Label
GB/T13384 General technical conditions for packaging of electromechanical productsJB/T7334 Hand chain hoist
3 Types and basic parameters
3.1 Type
3.1.1 The structural types of monorail trolleys are divided into the following two types according to the operation mode: a. Hand chain monorail trolley (abbreviated as hand chain trolley) as shown in Figure 1 As shown in Figure 2, the product code is GCL;
Approved by the Ministry of Machinery Industry of the People's Republic of China on July 18, 1994 102
Implementation on July 1, 1995
JB/T7332-—94
The hand-pushed monorail trolley (referred to as the hand-pushed trolley) is shown in Figure 2, and the product code is GCTo.5~10t
3.2 Basic parameters
The basic parameters of the monorail trolley shall comply with the provisions of Table 1. 1
Rated load, t
Standard for matching hand chain hoist
Lifting height, m
Minimum turning radius/m
Efficiency, %
Recommended I-beam (GB706)
Width b, mm
Distance between lower wing of I-beam and wheel
Flanking distance F, mm
Through dimension Emiamm
3.3 Product marking
3.3.1 Model indication method
68~130
Rated load, t
Product code (see 3.1| |tt||3.3.2 Marking example:
The chain trolley with a rated load of 5t should be marked as: 88~146
110~154
116~170
The chain trolley GCL5JB/T7332--94
The hand push trolley with a rated load of 2t should be marked as, hand push trolley GCT2JB/T7332--94
4 Technical requirements
4.1 Running performance
130180
136~180
150~180
4.1.1 Single When the rail trolley is under rated load (with hand chain hoist attached), it passes through the straight line and I-beam track with the minimum turning radius specified in Table 1. The cumulative running length during the test shall not be less than 4m. During operation, all rotating parts shall rotate flexibly without getting stuck or loose or tight. 103
4.1.2 Overall efficiency
JB/T7332--94
4.1.2.1 When the hand chain trolley is under rated load, the overall efficiency is determined by formula (1), and its calculated value shall comply with the provisions of Table 1. 9.8k(Q.+Q)(μd+2f)
Where:
- Additional resistance coefficient Number, =1.2;
Rated load, kg;
The mass of a monorail trolley and lifting tools, kg; Rolling bearing friction coefficient, μ-0.015; Inner diameter of a rolling bearing in a wheel, mm:
The rolling friction coefficient of a wheel along the running track, f-0.3; F——Measured average hand pull force, N;
Hand chain wheel pitch circle diameter, mm;
Gear reduction ratio.
(1)
4.1.2.2 When the hand trolley is under rated load, the overall efficiency is determined by formula (2), and its calculated value shall comply with the provisions of Table 1. =9. 8k(@.+Q)(rd+2f))
In the formula: k, Q, Q, product, d, f have the same meaning and value as formula (1): D-
wheel diameter, mm;
traction force, N;
%—actual measured value of the efficiency of the rope passing through the pulley. 4.2 Dynamic load running performance
During the dynamic load test, the monorail trolley shall run on the I-beam straight track according to the test load and cumulative running length specified in Table 2, and must meet the following requirements:
The operation shall be smooth, and the rotating parts shall rotate flexibly; the gear meshing and the meshing of the hand chain and the hand chain wheel shall be good; the hand pull force shall not change significantly.
Rated cutting weight Qt
Test load, t
Cumulative running length, m
4.3 Static load performance
The monorail trolley must be able to support a static tensile load of 4 times the rated load. 4.4 The hand chain shall comply with the provisions of Figure 3 and Table 3. Figure 3
Nominal diameter d
4.5 Assembly
Diameter limit deviation
Single link pitch P
JB/T7332-94
Single link pitch limit deviation △P
4.5.1 The wheel must be equipped with rolling bearings and should have sufficient grease. External center
Limited working load recommended breaking load
4.5.2 All interference fit parts should be pressed in smoothly during assembly without looseness or deflection. 4.5.3 The weld shall not have obvious defects such as cracks, holes, solid inclusions, lack of fusion and lack of penetration. 4.5.4 All rotating parts shall be flexible and shall not be stuck or loose or tight. 4.6 Appearance quality
4.6.1 All parts of the monorail trolley shall be well manufactured and shall not have defects such as scratches and burrs that affect the appearance quality. 8
4.6.2 The unprocessed exposed surface of the monorail trolley shall be painted. The coating shall be uniform, bright and colorful. There shall be no stains, marks, cracks, pores, shrinkage, shedding and roughness. 4.6.3 The exposed processed surface of the monorail trolley shall be blue or coated with anti-rust grease. There shall be no rust. 5 Inspection rules
5.1 Factory inspection
5.1.1 Each product shall be inspected and qualified by the manufacturer and issued with a product certificate before it can be shipped. 5.1.2 The items of factory inspection include:
． Appearance inspection: visual inspection in accordance with the provisions of Article 4.6: b. Dynamic load running performance, in accordance with the provisions of Article 4.2. 5.2 Type inspection
5.2.1 In any of the following situations, type inspection should generally be carried out: Trial type inspection for new products or old products transferred to factory production: a.
After formal production, if there are major changes in product structure, materials, and processes that may affect product performance; b.
Formally produced products should be inspected at least once a year; d. When the product is discontinued for more than half a year and production is resumed. 5.2.2 The items of type inspection include:
a. All factory inspection items;
b. Turning operation test, which shall be carried out in accordance with the provisions of Article 4.1.1; The whole machine efficiency shall be measured by measuring the hand-pulling force or traction force on a track with a slope not exceeding 3/1000, and then converted according to the C.
formula specified in Article 4.1.2. The efficiency value shall comply with the provisions of Table 1. The hand-pulling force can be measured by the sensor method or the base code method. The sensor method must be calibrated. The magnetic code measurement method is: when the monorail trolley bears the rated load, a code is hung on one side of its hand-pulling chain, and the base code is gradually increased in small amounts until the static friction is overcome and the monorail trolley is slowly driven to move. At this time, the weight of the code hung is the hand-pulling force of the measured monorail trolley. The hand-pulling force is measured three times and the average value is taken.
Determination of traction force: When the monorail trolley is under rated load, a soft rope is tied to the trolley, and a pulley is installed on the track at an appropriate distance from the trolley. The rope is passed around the pulley, and a magnetic code is tied to the other end of the rope. The base code is gradually increased in small amounts until the static friction is overcome and the monorail trolley is slowly driven to move. At this time, the weight of the hanging code is the traction force of the trolley being measured. The traction force should be measured three times and the average value should be taken.
d, static load test
JB/T7332-94
Before the test, the monorail trolley is adjusted to the maximum track width, clamped on the universal material testing machine as shown in Figure 4, and connected to the lifting ring with a special clamp. During the test, the load should be slowly and evenly applied until the test load specified in Article 4.3 is reached and maintained for 1 minute. Note, (I) When testing the hand chain monorail trolley, the hand chain wheel, hand chain and transmission shaft can be removed first. ②) If a trolley of more than 16t is connected by two trolleys, the body and the lifting ring can be tested separately. The force applied to the lifting ring during the test should be similar to that applied during actual use. bzxZ.net
6 Marking and packaging
6.1 Each monorail trolley should have a product label that complies with the requirements of GB/T13306 and should indicate: a.
Manufacturer name;
Product name;
Trademark;
Product model or mark:
Main parameters of the product;
Manufacturing date (or number) or production batch number. 6.2 Packaging
When the monorail trolley leaves the factory, it must be properly packaged, and the packaging should comply with the requirements of GB/T13384. 6.3 The factory products should be accompanied by the following random documents: a.
Product certificate:
Product use and maintenance instructions.
Additional instructions:
This standard is 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, and the main drafter of this standard is Liang Jianai.
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