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Industry Standard of the People's Republic of China
Combined Steel Tankway Roller Lugs
Subject Content and Scope of Application
MT 236--91
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of combined steel tankway roller lugs (hereinafter referred to as "roller lugs"). This standard applies to roller lugs that guide vertical shaft hoisting containers (skips, cages, counterweights) along combined steel tankways. 2 Reference standards
Technical conditions for ordinary carbon structural steel
Provisions for shape and position tolerances without tolerances GB 1184
GB1804 Tolerances and fits Limit deviations of dimensions without tolerances GB1972 Disc springs
JB/ZQ3011 General technical conditions for welded parts of engineering machinery Product classification
This standard is compiled into five varieties
Single-row wheel roller ear $250mm (Figure 1);
$300 mm (Figure 1);
Single-row wheel roller tank ear 9
Single-row wheel roller tank ear 350mm (Figure 1);
Double-row wheel roller tank ear
$300mm (Figure 2);
Double-row wheel roller tank ear $350mm (Figure 2). 3.2 Basic parameters and dimensions
The basic parameters and dimensions of single-row wheel roller tank ears and double-row wheel roller tank ears shall comply with the requirements of Figure 1, Figure 2 and Table 1. 3.2.1
Approved by the Ministry of Energy of the People's Republic of China on February 2, 1991, 262
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Implementation on May 1, 1991
Next installation
MT 236—91
Figure 1 Single-row wheel roller ear
Basic parameters
Maximum horizontal force, kN
Weight, kg
Buffer stroke, mm
MT 236—91
Figure 2 Double-row wheel roller ear
Table 1 Basic parameters and main dimensions
Basic parameters
Note: The weight values in the table are the weights of a group of three single wheels. 3.3 Model compilation method
Model compilation example:
Standard zero
MT 236-—91
Continued Table 1
180 or 200
Main parameter code
First characteristic code
Type code (roller ear)
Roller diameter, cm
Double-row wheel roller ear (single-row wheel roller tank ear is not marked) Roller tank ear
Water free
4 Technical requirements
MT 236—91
4.1 Roller tank ears shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved through the prescribed procedures. 4.2 The general technical requirements for equipment manufacturing not specified in this standard shall be implemented in accordance with the relevant provisions of national standards and industry standards. 4.3 The materials used for roller ears must comply with the relevant technical provisions of national and industry standards and have a certificate of conformity from the supplier. Otherwise, they must be tested and can only be used if they are qualified.
4.4 The buffer device of the roller ears adopts a disc spring group. The total buffer stroke shall not exceed the provisions of Table 1. 4.5 The roller material of the roller ears is polyurethane rubber, and the material requirements shall comply with the provisions of Appendix A of this standard. 4.6 The calculation of the maximum horizontal force borne by the roller ears shall comply with the provisions of Appendix B of this standard. 4.7 The welds shall be smooth and neat, and there shall be no defects such as burn-through, cracks, and arc pits. 4.8 The parts and components formed by welding must be shaped after welding. 4.9 The parts and components of each metal component except the mating surface must be treated with anti-corrosion before assembly. 4.9.1 Before painting, parts and components must be treated to remove the metal surface to the extent that only slight dot-shaped or stripe-shaped traces remain, and the surface should be cleaned with dry compressed air or other tools, and the surface should be silver-gray. 4.9.2 Select appropriate anti-corrosion coatings according to the conditions of the mine. Under medium and alkaline water conditions with a pH greater than or equal to 6, epoxy (asphalt) coatings can be used as a priority. Under acidic conditions with a pH less than 6 and in areas with high salt content in groundwater, chlorinated (chloroprene) rubber coatings can be used as a priority.
4.9.3 When epoxy (asphalt) coatings are selected, epoxy zinc-rich paint can be used as the primer of the coating, and when chlorinated (nitrified) rubber coatings are selected, chlorinated (chloroprene) rubber zinc-rich paint can be used as the primer of the coating. 4.9.4 Apply the primer once, and the coating thickness is 30μm. Apply the protective topcoat three times, and the total coating thickness is not less than 150um. The adhesion of the paint film is not less than 80%. Paint the outer surface with orange paint.
4.10 The maximum horizontal force that the roller tank ear bears shall comply with the provisions of Table 2. Table 2 Maximum horizontal force that the roller tank ear bears
Maximum horizontal force that the roller tank ear bears
All parts of the roller tank ear must be inspected and qualified, and purchased parts and outsourced parts must have a certificate of conformity before they can be assembled. 4.11
During assembly, the bearing space must be filled with rolling bearing grease. 4.12
After assembly, all fasteners must be tightened, and the moving parts should move flexibly without sticking. 4.13
4.14This standard applies to the cross-sectional width of the combined steel tank channel of 180mm or 200mm. 5 Test method
5.1 Appearance inspection
Visual inspection The surface of the parts and components should be smooth and flat, and no defects such as cracks, burrs, scratches, and rust are allowed. 5.2 Weld quality inspection
Visually inspect all welds, and their external defects shall not exceed the allowable range specified in JB/ZQ3011. If necessary, use a 10x magnifying glass for inspection.
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5.3 Assembly quality inspection
MT 236-91
Inspect according to Article 4.13 of this standard. Rotating parts must rotate flexibly. 5.4 Paint quality inspection
5.4.1 The outer surface should be bright, flat, uniform in color, free of mechanical impurities, cracks, peeling and flow marks, and no traces of trimming. 5.4.2 Use the grid method to inspect. Use a single-sided blade to draw more than 100 small grids of 1mm×1mm, and then gently wipe the paint film with your hand. If more than 95% of the paint film does not fall off, it is excellent, and more than 80% does not fall off, it is qualified. 5.5 Dimensional inspection
Use conventional measuring tools to check the main dimensions of the product, which must comply with the manufacturing drawings and various technical requirements and the provisions of Table 1. 5.6 Maximum horizontal force inspection
5.6.1 Check on a special test bench. The stroke of the roller is controlled by the set top screw, and the maximum horizontal force on the roller tank ear is read by the dynamometer set between the top screw and the roller. 5.6.2 The manufacturer should sample 10% of the finished products from the same batch of products and test the single wheel. When the roller retracts to the requirements of Table 1, it shall comply with Article 4.10 of this standard. 5.7 Installation and commissioning inspection
5.7.1 During on-site installation, according to the design requirements of the lifting container, first adjust the pressure between the roller tank ear and the tank channel, and tighten the bolts connecting the bracket and the base. Ensure that the axis centerline is horizontal or the radial centerline is perpendicular to the tank channel surface. 5.7.2 During operation, the rubber wheel of the roller tank ear is worn, so the wedge block should be adjusted in time to make the roller tilt forward and close to the tank channel to ensure the pressure between the roller tank ear and the tank channel.
5.8 Operation test inspection
5.8.1 For the first batch of products of this standard, the manufacturer should conduct operation test on site. 5.8.2 During the 6-month trial operation of the roller tank ear, the manufacturer shall conduct three random tests and keep records and fill in Table 3. Table 3
Test date
Year/Month/Day
Year/Month/Day
Year/Month/Day
Overall deformation
Disc spring
Deformation
Running distance
Cumulative value, km
Actual wear of rubber wheel
Cumulative value, cm2
5.8.3The overall structure and disc spring have no obvious deformation, which basically meets the requirements of Table 1 of this standard and is a qualified product. 5.8.4 Check of actual wear of rubber wheel
5.8.4.1 Put the unused rubber wheel and the used rubber wheel into the water tank successively, and measure the volume of the water level difference, which is the volume of the used rubber wheel.
5.8.4.2 The volume of the rubber wheel wear under test shall meet the following requirements: Vactual measurement Vcalculation
Where: Vtcalculation=S(km)×0.05(cm2)÷1.61(km)S-
The cumulative value of the actual running distance of the rubber wheel under test. 6 Inspection rules
6.1 The roller can ears must be inspected and qualified by the quality inspection department of the manufacturer and be accompanied by a product quality certificate before leaving the factory. 6.2 Inspection of roller lug products is divided into factory inspection and type inspection, which shall be carried out according to the contents specified in Table 4. Type inspection shall be carried out in any of the following cases: trial production and identification of products for transfer to other factories; resumption of production after two years of suspension; major changes in structure, materials and process after formal production, which may affect product performance; major differences between factory inspection results and the last type inspection results; requirements put forward by the national quality supervision agency.
Table 4 Inspection Items
Inspection Items
Inspection Types
Factory Inspection
Appearance Inspection
Welding Quality Inspection
Assembly Quality Inspection
Painting Quality Inspection
Dimension Inspection
Maximum Horizontal Force Inspection
Installation and Debugging Inspection
Operation Test Inspection
Note: ①“√” in the table indicates that the item is fully inspected. ②“△” in the table indicates that the item is inspected on site. ③“×” in the table indicates that the item is not inspected. V
Type Inspection
6.3When inspecting the product type, the number of random inspections shall not be less than 25% each time. If the random inspection fails, double the random inspection shall be conducted. If it still fails, the product shall be deemed unqualified.
6.4The installation and debugging inspection of the roller tank ears shall be carried out on site by the user, and the manufacturer shall be responsible for handling the manufacturing quality problems that occur during the trial operation. 6.5 The user has the right to inspect whether the product quality meets the requirements in accordance with the provisions of this standard. If there is any objection, the quality supervision department shall arbitrate. 7
Marking, packaging, transportation, storage
7.1 Marking
Fix the product nameplate on the exposed surface of the roller ear bracket. The nameplate should indicate the following: manufacturer name;
product name;
product model;
outer dimensions (length×width×height, mm);
factory date and number.
7.2 Packaging
7.2.1 Before packaging, the exposed surface of the roller ear machined parts should be coated with a layer of anti-rust oil, wrapped with plastic film as a whole and placed in a box. Each box only contains the same variety, and the surroundings are filled with soft materials. 7.2.2 The outside of the box is tied with a steel strip, and the name, specification, quantity and outer dimensions and weight of the roller ear of the same variety as the box are printed on the front of the box.
7.2.3 Product delivery documents should be packed in plastic bags and placed in boxes, and the following documents should be provided together: a.
Product certificate;Www.bzxZ.net
Product manual;
Packing list;
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External standard Fo
Year belt Xiaguan
General drawing of roller tank ears.
7.3 Transportation and storage
MT 236—91
7.3.1 This product can be transported together with tank cages or skip equipment. 7.3.2 This product can be ordered and shipped separately. 7.3.3 This product must be stored in a warehouse or covered shed. 7.3.4 If there is heating or other heat sources, this product should be stored at a distance of more than 2m. 7.3.5 If the product is stored for more than half a year, it must be disassembled, cleaned, and repaired before use. Standard search network
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Hardness (Shore A)
300% tensile strength, MPa
Tensile strength, MPa
Elongation at break, %
Permanent deformation, %
Tear strength, MPa
Rebound, %
Brittle temperature, ℃
MT 236—91
Appendix A
Unified technical conditions for tetrahydrofuran-propylene oxide copolymer polyurethane casting adhesive (reference)
Akron abrasion, cm/1.61km
Constant compression permanent deformation, %
(70℃×22 h)
10# hydraulic oil
70℃ × 48 hAg(%)
Oil resistance
Water resistance
Aviation kerosene
Room temperature× 48 hAg(%)
Carbon+benzene (3:1)
Room temperature×24 hAg(（%)
Tap water
Room temperature×24 hAg（%)
Uniform technical conditions
Below—70
2～10
Appendix B
Selection and calculation method for the maximum horizontal force borne by the wheel tank ears (reference)
Test method
HG 4—827
GB530 (initial type)
HG 4—553
HG 4—554
HG 4—843
HG 4—829
HG 4—847
B1 This standard is calculated based on 1/24 of the total weight of the lifting container (the container's own weight plus the load weight), and the maximum horizontal force that the roller ear can bear is selected. 270
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Additional Notes:
MT 236-91
This standard was proposed by the Infrastructure Bureau of China Tongpei Coal Mine Corporation. This standard was drafted by Chongzhou Coal Design Institute. The main drafters of this standard are He Jiashou and Gong Shuigen. This standard is entrusted to Chongzhou Coal Design Institute for interpretation. Standard Degree Search Network DeviceMPa
Rebound, %
Brittle temperature, ℃
MT 236—91
Appendix A
Uniform technical conditions for tetrahydrofuran-propylene oxide copolyether polyurethane casting adhesive (reference)
Akron abrasion, cm/1.61km
Constant compression set, %
(70℃×22 h)
10# hydraulic oil
70℃ × 48 hAg(%)
Oil resistance
Water resistance
Aviation kerosene
Room temperature × 48 hAg(%)
Carbon + benzene (3:1)
Room temperature × 24 hAg(（％）
Tap water
Room temperature × 24 hAg (%)
Uniform technical conditions
Below—70
2～10
Appendix B
Selection and calculation method for the maximum horizontal force borne by the ears of hydraulic turbines (reference)
Test method
HG 4—827
GB530 (starting type)
HG 4—553
HG 4—554
HG 4—843
HG 4—829
HG 4—847
B1 This standard is calculated based on 1/24 of the total weight of the lifting container (the container's own weight plus the load), and the maximum horizontal force that the roller ear can bear is selected. 270
Standard Authorization Search Network
External Standard Buddha Rail
Additional Notes:
MT 236-91
This standard was proposed by the Infrastructure Bureau of China Tongpei Coal Mine Corporation. This standard was drafted by Chongzhou Coal Design Institute. The main drafters of this standard are He Jiashou and Gong Shuigen. This standard is entrusted to Chongzhou Coal Design Institute for interpretation. Standard Degree Search Network DeviceMPa
Rebound, %
Brittle temperature, ℃
MT 236—91
Appendix A
Uniform technical conditions for tetrahydrofuran-propylene oxide copolyether polyurethane casting adhesive (reference)
Akron abrasion, cm/1.61km
Constant compression set, %
(70℃×22 h)
10# hydraulic oil
70℃ × 48 hAg(%)
Oil resistance
Water resistance
Aviation kerosene
Room temperature × 48 hAg(%)
Carbon + benzene (3:1)
Room temperature × 24 hAg(（％）
Tap water
Room temperature × 24 hAg (%)
Uniform technical conditions
Below—70
2～10
Appendix B
Selection and calculation method for the maximum horizontal force borne by the ears of hydraulic turbines (reference)
Test method
HG 4—827
GB530 (starting type)
HG 4—553
HG 4—554
HG 4—843
HG 4—829
HG 4—847
B1 This standard is calculated based on 1/24 of the total weight of the lifting container (the container's own weight plus the load), and the maximum horizontal force that the roller ear can bear is selected. 270
Standard Authorization Search Network
External Standard Buddha Rail
Additional Notes:
MT 236-91
This standard was proposed by the Infrastructure Bureau of China Tongpei Coal Mine Corporation. This standard was drafted by Chongzhou Coal Design Institute. The main drafters of this standard are He Jiashou and Gong Shuigen. This standard is entrusted to Chongzhou Coal Design Institute for interpretation. Standard Degree Search Network Device
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