JB/T 7331-1994 General suspension conveyor types and basic parameters
Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T7331-94
Universal Suspension Conveyor
Types and Basic Parameters
Published on 1994-07-18
Ministry of Machinery Industry of the People's Republic of China
Implemented on 1995-07-01
Mechanical Industry Standard of the People's Republic of China
Universal Suspension Conveyor
Types and Basic Parameters
Subject Content and Scope of Application
This standard specifies the types and basic parameters of universal suspension conveyors. JB/T7331-94
This standard applies to universal suspension conveyors with detachable chains as traction parts and I-beams as rails (heavy duty) and with double-hinged chains as traction parts and open square tube special-shaped steel as rails (light duty), and should also be used as a reference for multi-type suspension conveyors and other types of universal suspension conveyors.
2 Reference standards
ZBJ81008
Dimensions, shapes, weights and allowable deviations of hot-rolled I-beamsHanging conveyor traction removable chains and sprockets
The general hanging conveyor consists of a track and a traction chain (including load-bearing parts) to form a closed conveying loop (system), which can form a plane conveying system or a space conveying system. In the system, the traction chain is driven by the driving device to carry the load along the track, and the tensioning device keeps the traction chain at a tension not less than a certain value to ensure the normal engagement of the driving claw or driving sprocket with the traction chain. The track, traction parts and load-bearing parts of the general hanging conveyor are shown in Figure 1. Heavy
bLight
General purpose suspension conveyors generally use crawler drive devices. Under special circumstances, sprocket drive can also be used, as shown in Figure 2, Figure 2
Approved by the Ministry of Machinery Industry on July 18, 1994
Implementation on July 1, 1995
JB/T7331-94
3.2 The tensioning device of general purpose suspension conveyors can be a heavy hammer, a spring, a screw, a wave pressure pneumatic, etc. 3.3 The traction parts of general purpose suspension conveyors use detachable chains and double articulated chains. The detachable chain should meet the requirements of ZBJ81008. The type of double-jointed chain is shown in Figure 3 (double chain plate structure can also be used). Figure 3
3.4 The hot-rolled I-beams used in the tracks of heavy-duty general purpose suspension conveyors should meet the requirements of GB706. The tracks of light-duty general purpose suspension conveyors use open square tube special-shaped steel, as shown in Figure 4. Figure
3.5 Horizontal rotation of heavy-duty general-purpose suspension conveyor The horizontal rotation of light-duty general-purpose suspension conveyor is achieved through water 8 Smooth wheel
If a smooth wheel, sprocket or roller group is used as the rotation support, as shown in Figure 5, a rotating wheel can also be used for small radius rotation
b Sprocket
e Drop in
3.6 The sprockets of the sprocket drive device and the sprocket rotating device of the heavy-duty general-purpose suspension conveyor shall comply with the requirements of ZBJ81008. 3.7 Method of indicating the model of general suspension conveyor 2
Marking example:
JB/T7331-94
Heavy duty is the nominal pitch of the chain, light duty is the chain meshing pitch: mm type code, heavy duty is not marked, light duty is Q
General suspension conveyor code
Heavy duty general suspension conveyor with a nominal chain pitch of 100mm: Suspension conveyor XT100JB/T7331
Light duty general suspension conveyor with a chain meshing pitch P of 200mm: Base suspension conveyor XTQ200JB/T7331
4 Basic parameters
4.1 The basic parameters and dimensions of general suspension conveyors shall comply with the provisions of Figure 1, Figures 3 to 5 and Tables 1 to 3. It is recommended to focus on Tables 1 and 3.
Drag chain
Conveyor
Nominal pitch
Drag chain
Theoretical pitch
Slide trolley
Ultimate load
Slideway trolley
Note: ①The ultimate load of the trolley refers to the load-bearing capacity of the trolley in a stationary state on the horizontal track of the conveyor. For the calculation method of the trolley's allowable load, please refer to Appendix A (reference) ③The minimum required straight bending radius refers to the distance between the slide trolleys is 4P. Table 2
Drag chain
Conveyor
Name pitch
Drag chain
Theoretical pitch
Clearing trolley
Inclined section
Line waiting angle
Inclined section
Line inclination
Minimum vertical
Bending radius
Minimum vertical
Bending radius
Conveyor model
XTQ150
XTQ200
XTQ250
Chain meshing pitch
JB/T 7331-- 94
Single point allowable
Acceptable capacity
Track section size
(bXbXd-)
55×55×318
70X70×425
80×80×528
68× 71× 4-25
Wheel diameter
Minimum horizontal bending radius
4.2 The spacing between the hangers of heavy-duty general-purpose suspension conveyors should be an even multiple of the theoretical pitch of the traction chain. The spacing between the hangers of light-duty general-purpose suspension conveyors should be an integer multiple of the meshing pitch.
4.3 When using a smooth wheel and roller group slewing device, the track bending radius is: 315, 400, 500, 630, 800, 1000, 1250, 1600, 2500mm. The small size is suitable for smooth wheels, and the large size is suitable for roller groups.
The horizontal bending radius of the light general hanging conveyor is: 350, 500, 600, 800, 1000, 1250, 1600, 2000mm. The vertical bending radius of the general hanging conveyor is: 44
350, 400, 500, 600, 800. 1000, 1250, 1600, 2000, 2500. 3150, 3550, 4000, 4500, 6300, 8000mm, of which those below 1250mm are used for light general hanging conveyors. 4.5 The tensioning force of the tensioning device of the general hanging conveyor is S. =300~3000N
4.6 The operating speed of the general suspension conveyor traction chain is: 0.315, 0.4, 0.5, 0.63, 0.8, 1.0, 1.25, 1.6, 2.0, 2.5, 3.15, 4.0, 5.0, 6.3.8.0, 10.0.12.5, 16.0m/min.
Common codes
Chain theoretical pitch: P, mm;
Chain ultimate tensile load: Q.kN;
Chain allowable tension: ESJ.kN;
JB/T 733194
Appendix A
Calculation method of trolley allowable load
(reference part)
Chain tension at vertical curve; S..kN;
Trolley spacing: 7., mm
Trolley ultimate load: Q, kN;
Conveyor running speed:,m/min;
Vertical bending radius of track: R, mm;
Vertical bending radius at the chain: R; mm;Total length of conveyor line: L, mm;
Total length of all load lines: L, m.
Factors affecting the load-bearing capacity of trolley
Chain tension;
Working conditions of conveyor;
Operating speed of conveyor:
Trolley spacing:
Position, number and bending radius of vertical curves on the line. Working conditions of conveyor
The working conditions of conveyor are distinguished according to the characteristics of the environment where the conveyor is located and the production conditions. They are usually divided into three conditions: good, medium and heavy. The working condition classification is selected according to Table A1. Table A1
Clean, dry, ventilated and heated places, no water vapor and corrosive gas in the air:
Abrasive dust content in the ambient air is less than Smg/m\, one-shift work system, occasionally two-shift work;
Good maintenance conditions
No water vapor and corrosive gas in the air, relative intensity is not more than 60%, no condensation water is generated on the conveyor; The concentration of dense dust in the ambient air is less than 10mg/m; two-shift work system, occasionally three-shift work;
Medium maintenance conditions
Processing workshops and assembly workshops of nuclear machinery, food, radio, watch and other factories;
Transportation and distribution of printing and sub-factories of the postal system: clothing processing factories, etc.
Stable rubber product workshop:
Cold stamping workshop connected with cleaning and washing: Wood and product transportation in the material processing workshop; For closed, The most suitable conveying corridor
JB/T7331-94
Continued Table A1
There is water vapor and corrosive gas in the air, and the relative concentration can reach 90%:
The dust concentration in the ambient air is greater than 10mg/m'; The conveyor works under high temperature or low humidity:
Three-shift work system or continuous work system:
Poor maintenance conditions
A4 Determination of the allowable tension of the traction chain
Making or cleaning workshop;
Cleaning, spraying and drying production line:
Glass and glass product production conveyor line;
Slaughterhouse, cold storage:
Unclosed conveying corridor;
Open warehouse
The allowable tension of the traction chain [S] is determined by the working conditions, running speed and line complexity of the conveyor, and can be selected from Table A2. Table A2
Chain pitch
Conveyor working conditions
and line complexity
"Good
Working conditions
Working conditions
Working conditions
L flow weight
"Good
L flow weight
L flow weight
Line-
Line-
[Simple
Factory Simple
Chain ultimate tensile load
Running speed is v( m/min>
Allowable chain tension [S] kN
Note: A commercial single line refers to the situation where the total number of horizontal and vertical channels on a conveyor line does not exceed 20 (the vertical bend of the line from one height to another is calculated as two bends). A5 Determination of allowable load of trolley
A5.1 Determination of calculated load of trolley
The calculated load Q of trolley is determined according to formula (A1): 6
In the formula, K, is the speed coefficient, determined by Figure A1: JB/T 733194
Q,=QK,K,K
K, a proportional coefficient, is determined by Figure A2 according to the proportion of the length of the load section in the line: K
Temperature accumulation, selected according to Table A3.
Environmental clarity of the area where the trolley passes
125~150
When the ambient temperature of the area where the trolley passes is lower than 125C, the calculated load of the trolley can be found in Table A4. Table A4
Conveyor
When the running speed is v (m/min) Calculation load of trolley Q,2~3
A5.2 Determination of permissible load of trolley for horizontal line conveyor 3~5
For horizontal line conveyor without heavy straight curves on the line, the permissible load of trolley [Q] is calculated by formula (A2) [Q] = K, Q
Where: K, —- safety factor, for I-beam; K, -0.7. A5.3 Determination of permissible load of trolley for spatial line conveyor For spatial line conveyor with vertical curves on the line, the permissible load of trolley [Q] is calculated by formula (A3) [Q] = K,(Q, Q)
Where: Q-
-The additional load on the trolley due to the chain tension on the vertical curve. When the trolleys are arranged at equal intervals on the line (Figure A3), the additional load Q of the trolley is calculated according to formula (A4): (AI)
..(A2)
..(A3)
JB/T 733194
Q, S, T/R
When the trolleys are arranged in pairs on the line. The trolleys have two spacings of Tk and T× (Figure A4), and the additional load Q of each trolley is calculated according to formula (A5):
Qr = S, sinE(g + y)/2]
Where: (p/2)=are sin(Tk/2R,),(7/2)=are sin(T/2R,). The value of the additional load of the trolley increases with the decrease of the bending radius of the vertical curve. Figure A3
·(A5)
The additional load Q of each trolley can be found from Tables A5 to A7 according to the arrangement of the trolleys, the spacing, the value of the vertical bending radius and the value of the chain tension at the vertical curve. Table A5
6P=186
6P=480
8Ps640
Vertical sleeve
Bending radius
When the chain tension is S, [kN]
Additional load Q of the trolley-0.7. A5.3 Determination of the permissible load on the trolley of a space line conveyor There are vertical curves on the line of a space line conveyor. The permissible load on the trolley [Q] is calculated according to formula (A3) [Q] = K, (Q, Q)
In the formula: Q -
- The additional load acting on the trolley due to the influence of the chain tension on the vertical curve. When the trolleys are arranged at equal intervals on the line (Figure A3), the additional load Q of the trolley is calculated according to formula (A4): (AI)
..(A2)
..(A3)
JB/T 733194
Q, S, T/R
When the trolleys are arranged in pairs on the line. The trolleys have two spacings of Tk and T× (Figure A4), and the additional load Q of each trolley is calculated according to formula (A5): www.bzxz.net
Qr = S, sinE(g + y)/2]
Where: (p/2)=are sin(Tk/2R,),(7/2)=are sin(T/2R,). The value of the additional load of the trolley increases with the decrease of the bending radius of the vertical curve. Figure A3
·(A5)
The additional load Q of each trolley can be found from Tables A5 to A7 according to the arrangement of the trolleys, the spacing, the value of the vertical bending radius and the value of the chain tension at the vertical curve. Table A5
6P=186
6P=480
8Ps640
Vertical sleeve
Bending radius
When the chain tension is S, [kN]
Additional load Q of the trolley-0.7. A5.3 Determination of the permissible load on the trolley of a space line conveyor There are vertical curves on the line of a space line conveyor. The permissible load on the trolley [Q] is calculated according to formula (A3) [Q] = K, (Q, Q)
In the formula: Q -
- The additional load acting on the trolley due to the influence of the chain tension on the vertical curve. When the trolleys are arranged at equal intervals on the line (Figure A3), the additional load Q of the trolley is calculated according to formula (A4): (AI)
..(A2)
..(A3)
JB/T 733194
Q, S, T/R
When the trolleys are arranged in pairs on the line. The trolleys have two spacings of Tk and T× (Figure A4), and the additional load Q of each trolley is calculated according to formula (A5):
Qr = S, sinE(g + y)/2]
Where: (p/2)=are sin(Tk/2R,),(7/2)=are sin(T/2R,). The value of the additional load of the trolley increases with the decrease of the bending radius of the vertical curve. Figure A3
·(A5)
The additional load Q of each trolley can be found from Tables A5 to A7 according to the arrangement of the trolleys, the spacing, the value of the vertical bending radius and the value of the chain tension at the vertical curve. Table A5
6P=186
6P=480
8Ps640
Vertical sleeve
Bending radius
When the chain tension is S, [kN]
Additional load Q of the trolley
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