This standard specifies the specifications, dimensions, minimum tensile load, structural type and track type of double-articulated conveyor chains for closed-track light-duty suspension conveyors. This standard applies to double-articulated conveyor chains for light-duty suspension conveyors that continuously transport piece goods along closed-space tracks. JB/T 8546-1997 Double-articulated conveyor chain JB/T8546-1997 Standard download decompression password: www.bzxz.net

JB/T8546-1997
Appendix A of this standard is a reminder appendix.
This standard is proposed and managed by the National Technical Committee for Standardization of Chain Drives. The responsible drafting units of this standard: Chain Drive Research Institute of Jilin University of Technology, Suzhou Special Chain Factory The participating drafting units of this standard: Wuxi Nanfang Conveyor Co., Ltd., Suzhou Tongda Chain Conveyor Factory, Mechanical Science Research Institute of the Ministry of Machinery.
The main drafters of this standard: Sui Xuemin, Bao Weilie, Li Shengfa, Zhao Huaming. The participating drafters of this standard: Meng Xiangbin, Zhao Sailiang, Wang Jinwu. 306
Mechanical Industry Standard of the People's Republic of China
Double-hinged conveyor chains
Universal movement conveyor chainsJB/T 8546—1997
This standard specifies the specifications, dimensions, minimum tensile load, structural type and track type used for double-hinged conveyor chains for closed-track light-duty suspension conveyors.
This standard applies to double-articulated conveyor chains for light-duty suspension conveyors that continuously transport piece goods along closed tracks in space. 2
Cited 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 parties using this standard should explore the possibility of using the latest versions of the following standards. GB1801-79 Tolerances and fits to 500mm holes, shaft tolerance bands and fits JB/T7331-94 Types and structural parameters of general suspension conveyors 3 Chains
3.1 Specifications and types
The specifications of the double-articulated conveyor chain are shown in Table 1, and its structural type is shown in Figure 1. Figure 1 shows a schematic diagram of the chain structure type, not the actual shape of the chain. Table 1 Specifications of double hinged conveyor chain
SJ150A-8
SJ150D-8
SJ150Y-8
SJ200A-30
SJ200D-30
SJ250A-50
SJ250D-50
SJ250S-50
S J300A-120
SJ300S-120
Approved by the Ministry of Machinery Industry of the People's Republic of China on April 15, 1997
Maximum lifting weight at a single point
Implemented on January 1, 1998
JB/T8546--1997
Articulated block
a) Type A structure (double chain plate and double walking wheel single guide wheel) Chu wheel
b) Y-type structure (double chain plate single wheel single guide wheel) pin
joint block
Figure 1 Various structural types of double joint conveyor chains 3.2 Marking
JB/T8546
c) D-type structure (single chain plate double wheel double guide wheel) hand
articulated block Ning wheel
d) S-type structure (double chain plate double wheel double Guide wheel) Figure 1 (end)
The marking regulations for double-articulated conveyor chains are as follows; chain number × number of pitches}-standard number
Marking example:
Articulated block
The double-articulated conveyor chain manufactured according to this standard has a pitch of 200mm, a structural type of double chain plates, double running wheels, and a single guide wheel, a single-point lifting weight of 30kg, and each chain is assembled according to 268 pitches. Its marking is as follows: SJ 200A-30X268-JB/T 8516 19973.3 Size and parameters
SJ150A-8
SI150D-8
SJ150Y-8
SJ200A-30
SJ200D-30
SJ250A-50
SJ250D-50
SJ250S-50
SJ300A120
SJ3005-120
3.4 ​​Tensile test
JB/T 8546 - 1997
Table 2 Dimensions, measuring forces and tensile loads of double-articulated conveyor chains Inner link
Extra pulley
Maximum force
3.4.1 The minimum tensile load is the tensile load value that must be achieved when the chain sample is tested for breaking in accordance with 3.4.2. This minimum tensile load is not a working load and can only be used as a comparison between chains of different constructions. For chain gates, the manufacturer should be consulted or the values ​​they give should be checked.
3.4.2 The tensile load during the test shall not be less than the tensile load value specified in 2 and shall be applied slowly to both ends of the chain. The length of the test chain shall not be less than 2.5 chain pitch values ​​and the ends shall be articulated. The fixture used shall enable the ends of the chain centerline to move freely in the plane normal to the joint.
Chain damage should be considered to occur at the initial point where the load does not increase but the chain deformation continues to increase, that is, the -·th peak point on the load-chain length deformation diagram.
If the damage occurs at the hinge block connected to the clamp, the test is invalid. 3.4.3 The tensile test is a destructive test. Even if the chain does not suffer obvious damage after being subjected to the minimum tensile load, the force on the chain exceeds its service point, so the chain that has passed the tensile test cannot be used again. 3.5 Chain length accuracy
The chain should be measured in length before lubrication. The minimum number of chain pitches for measurement should not be less than 4. Both ends of the chain should be hinged. The measured chain should be supported over the entire length and the measuring force should be applied as specified in Table 2. The actual deviation value of the measured chain length shall not exceed 0.3% relative to the nominal size of the measured length.
3.6 Flexibility test
The flexibility test of the chain should be carried out after assembly and before lubrication. The pitch number of the tested chain segment should be in accordance with Table 3. When the running wheels and guide wheels are turned by hand, they should be able to turn more than 360° flexibly. When the tested chain segment is lifted to the other end off the ground, observe whether it can droop straightly without any obstruction.
The tested chain segment is successively placed in the two tracks shown in Figure 2, and a suspended hammer is added respectively, so that it can pass through the track smoothly without obstruction under the action of the weight difference of the hammer (see Table 3). The shape parameters of the track are shown in Figure 2, Table 3, and Appendix A (Suggested Appendix) A! 310 | | tt | | SJ150A-8 | |tt||SJ300A-120
SJ300S-120
JB/T8546—1997||tt| |Table 3 Dimensions of track for flexibility test, overhang weight difference and number of tested chain segments Radius of bend
(Note: The weight of W2 shall not be less than 5 kg.
Overhang weight difference
a) Track for flexibility test in horizontal plane
Figure 2 Track for flexibility test
Length of straight track
Number of tested chain segments pitches
3.7 Marking
Chains shall be marked as follows:
a) Manufacturer’s name or trademark;
b) Chain number in Table 1.
Track type
Track type is shown in Figure 3.
JB/T8546-1997
b) Flexibility test track in the vertical plane
Figure 2 (end)
5 Packaging, transportation and storage of chains
JB/T8546-1997
Figure 3 Track type
5.1 After cleaning and anti-corrosion treatment, the chain shall be packaged with moisture-proof and waterproof packaging materials and accompanied by a product certificate. The specifications of the chains in the same packaging unit must be the same. From the date of leaving the factory, the product shall not be rusted or damaged due to improper packaging within six months under normal transportation and storage conditions. 5.2 Each packaging unit shall be marked on the outside:bzxZ.net
a) product name and mark;
b) factory number;
c) quantity;
d) net weight and gross weight:;
e) packaging storage and transportation indication mark;
f) manufacturer's name;
g) factory date.
B/T8546--1997
Appendix A
(Suggestive Appendix)
Cross-sectional dimensions of tracks used for double-articulated conveyor chainsA1 Figure 3 shows the track type used for double-articulated conveyor chains. The cross-sectional dimensions can be found in Table A1. Table A1 Track section dimensions for double hinged conveyor chains Chain
SJ150A-8
SJ150D-8
SJ150Y-8
SJ200A30
SJ200D-30
SJ250A-50
SJ250D-50
SJ250S-50
SJ300A-120
SJ300S-120
Track form
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