MT 389-1995 Technical requirements for horizontal tunnel man-carriages in coal mines
Some standard content:
Coal Industry Standard of the People's Republic of China
Technical Conditions for Man-driven Vehicles for Coal Mine
1 Subject Content and Scope of Application
MT389—1995
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of man-driven vehicles for coal mines (hereinafter referred to as man-driven vehicles).
This standard applies to man-driven vehicles for transporting personnel in underground coal mines. 2 Reference Standards
GB4786.1 Open Wheelsets for Narrow-gauge Vehicles in Mines 3 Technical Requirements
3.1 General Requirements
3.1.1 Products shall comply with the requirements of this standard and be manufactured according to drawings and technical documents approved by the prescribed procedures. 3.1.2 The materials of the main parts shall have a certificate of conformity and shall be used only after re-inspection or review. 3.1.3 Purchased and outsourced parts shall have a certificate of conformity and shall be used only after re-inspection or review. 3.2 Requirements for the whole machine
3.2.1 The welded body requires the weld to be uniform and smooth, and shall not have defects such as cracks, slag inclusions, pores, burn-through and false welding. 3.2.2 The anti-rust paint and topcoat of the passenger car compartment shall be uniform, and there shall be no defects such as missing paint, sagging, accumulation, blistering and shedding. 3.2.3 The passenger comfort coefficient of the passenger car compartment shall not be less than 0.3m2/person, and the average seat width per person shall not be less than 420mm. The comfort coefficient is calculated according to the following formula:
Where: A-carriage bottom area, m\;
-rated number of passengers.
3.2.4 The deviation of the length (excluding the bumper) of the assembled passenger car compartment shall not be greater than ±10mm, and the width deviation shall not be greater than ±5mm. The height deviation shall not be greater than ±5mm.
3.2.5 The steering gear shall have a rotation angle of not less than 10° in the horizontal direction relative to the longitudinal center line of the car chassis. 3.2.6 Turn the wheels by hand, and each wheel must not be stuck or stop turning. 3.2.7 The wheelset of the steering gear requires that the two wheels on the same axis should swing in the vertical direction relative to the straight rail surface not less than 20mm. 3.2.8 The assembled man-car is placed on a straight track, and the wheels of the steering gear should be in smooth contact with the horizontal rail surface. It is allowed that there is a gap between one wheel and the rail surface in each set of steering gears, but it shall not exceed 2mm. 3.2.9 The gap between the side pillows on both sides of the steering gear and the balance block on the crossbeam of the carriage chassis should be 3-4mm when unloaded. 3.2.10 The traction height deviation from the center of the coupling traction rod to the rail surface should not be greater than ±5mm. 3.2.11 The center line of the coupling traction rod should be symmetrical to the longitudinal center line of the plane on the carriage chassis, and its deviation should not be greater than ±5mm. Approved by the Ministry of Coal Industry of the People's Republic of China on August 22, 1995378
Implementation on October 1, 1995
MT389—1995
3.2.12 For man-carriages equipped with brakes, the brakes shall be easy to operate, flexible and reliable. 3.2.13 When a man-carriage is accidentally uncoupled during operation, the brake shall be used for braking, and the braking distance shall not exceed 20m. 3.2.14 When a single man-carriage passes through a horizontal curve with a minimum curvature radius specified in the design, the gap between the protruding part of its steering wheel set and the chassis shall not be less than 10 mm.
3.2.15 When a man-carriage is in a train, when the traction three-ring chain is tightened and the butt springs of the two man-carriages are compressed to the limit load, they shall be able to pass through a horizontal curve with a minimum curvature radius specified in the design.
3.2.16 On a straight track with a slope of 3% to 5%, when a vehicle with a rated heavy load collides with each other, derailment shall not occur. The bumper can quickly return to its original position under the action of elastic force, and the parts of the vehicle shall not be loose, cracked or deformed. The weld shall not be open or broken. 3.3 Requirements for main components
3.3.1 The chassis of the carriage should be straight, with a straightness not greater than 2/1000, a flatness not greater than 1.5/1000, and the corresponding sides of the chassis should be parallel to each other, with a parallelism not greater than 3/1000. 3.3.2 After the steering gear is assembled, the center lines of the two sets of wheel axles should be parallel to each other, and the difference between the spacing on one side and the spacing on the other side should not be greater than 1.5mm.
3.3.3 The limit deviation of the wheel flange distance of the wheelset shall comply with the provisions of GB4786.1. 3.4 Requirements for main parts
3.4.1 The minimum breaking force of the traction rod, pin and three-link chain after tensile test shall not be less than 13 times the maximum static load. 3.4.2 The shock-absorbing springs (cylindrical helical springs) of the steering gear, connector and bumper shall be compressed three times under the test load, and their permanent deformation shall not exceed 0.5% of the free height.
3.4.3 The limit deviations of the shock-absorbing spring size are as follows: The limit deviation of the spring height is ±2% of the free height; a.
The limit deviation of the spring outer diameter is ±0.015D (D is the spring middle diameter); b.
For compression springs with flat ends or ground flat, the verticality of the axis to the two end surfaces in the free state shall not exceed 0.05Hc.
(H is the free height).
3.5 Design requirements
3.5.1 Observation windows shall be opened at the front and rear ends of the carriage. 3.5.2 The carriages shall be equipped with seats and backrests with smooth surfaces, and the backrests shall be easy to disassemble. 3.5.3 The entrances and exits of the carriages shall be equipped with protective chains or protective railings that are easy to remove and hang, and shall not fall off automatically during operation. 3.5.4 There shall be no sharp edges or protrusions in the carriages that are sufficient to injure people. The floor of the carriages shall be sealed with patterned steel plates or wooden boards. 3.5.5 The end plate at one end of the carriage shall be provided with a movable window for the stretcher carrying the wounded to enter and exit, or an openable side door shall be installed on one side of the carriage body, which can be quickly opened or removed when necessary. 3.5.6 The passenger car carriage shall be equipped with front and rear end plates and a metal ceiling, and the thickness of the steel plate shall not be less than 2mm. 3.5.7 The pin shaft of the connector shall have a closed pin structure to prevent cross-pinning. 3.5.8 The structure of the connector shall not affect the dismantling of the train and the use of the train after the reversal of a single passenger car. 3.5.9 The steering gear, connector and bumper shall all be equipped with shock-absorbing devices. 3.5.10 The main force-bearing parts of the coupling (traction rod, pin and three-link chain) shall be made of high-quality carbon steel or alloy structural steel with a carbon content of no more than 0.4%.
3.5.11 Man-carriages used on slopes greater than 15% (including 15%) shall be equipped with motorized brakes or manual brakes. 3.5.12 The normal service life of man-carriages shall not be less than 5 years. 4 Test methods
4.1 The following measuring tools are used for dimensional measurement:
a. Steel ruler and steel tape measure with a graduation value of 1mm; b. Vernier caliper with a graduation value of 0.02mm; 379
c. Feeler gauge;
d. Ring gauge;
e. Wide seat angle ruler.
4.2 Test equipment
MT 389-1995
a. Material testing machine: accuracy not less than ±1%, minimum scale value not greater than 2kN; b. Spring testing machine: accuracy not less than ±1%, minimum scale value not greater than 0.1kN. 4.3 Machine test
4.3.1 Visually inspect the quality of the weld.
4.3.2 Visually inspect the quality of the paint layer.
4.3.3 Measure the area of the bottom of the carriage, divide it by the rated number of passengers, and calculate the area occupied by each person. And measure the width of the seat occupied by each person. 4.3.4 Place the assembled passenger car on a straight track, and measure the length of the car body (excluding the ends, and measure once on each side) and the width of the carriage chassis along the length direction of the car body. Measure the height of the car body based on the lower plane of the chassis. 4.3.5 Place both ends of the man-car frame horizontally on the bracket, with the steering gear in a horizontal position so that its longitudinal center line is parallel to the center line of the man-car frame. Mark a set of corresponding base points on the upper and lower core discs respectively, and use these points as references to rotate the steering gear in the horizontal direction. When the wheel flange contacts the channel steel of the man-car frame, measure the size between the two base points on the upper and lower core discs (the chord length of the circle), and calculate the corresponding turning angle.
4.3.6 Turn all the wheels of the two sets of steering gears by hand to check the turning flexibility. 4.3.7 Place the man-car on a straight track, use a set of steering gear wheels as a fulcrum, and slowly lift one end of the man-car frame with a jack, so that the other set of steering gear wheels are gradually lifted off the track surface. While ensuring that the inner pair of wheels of the steering gear are still in contact with the track surface, measure the maximum height of the outer pair of wheels lifted off the track surface. wwW.bzxz.Net
4.3.8 Place the man-car on a straight track and use a feeler gauge to measure the gap between the wheel treads of the front and rear steering gears and the track plane. 4.3.9 Measure the gaps between the pillows next to the two steering gears and the balance blocks on the frame crossbeam, and calculate the average value of the gaps on both sides. 4.3.10 On a straight track, with the track surface as the reference, measure the vertical height from the center of the traction rod of the connectors at both ends of the man-car to the track surface, and calculate the average value.
4.3.11 With the traction center of the connector as the reference, measure the distance from the traction center to both sides of the plane on the frame. 4.3.12 Place the man-carrying vehicle with brakes on a straight track, move the brakes manually in a stationary state, and check the operation of each part of the brakes.
4.3.13 Place the man-carrying vehicle with brakes on a straight track with a slope of 15%, run downward at the designed operating speed, manually move the brakes to brake, and measure the distance the man-carrying vehicle slides from the start of manual brake movement to the stop of the man-carrying vehicle. 4.3.14 Use manpower to push a single empty man-carrying vehicle through a horizontal curve with the minimum curvature radius specified in the design. And measure the gap between the protruding part of the wheel rim of the steering gear and the edge of the chassis
4.3.15 Use manpower to push two empty man-carrying vehicles through a horizontal curve with the minimum curvature radius specified in the design, and check the working conditions of the three-ring chain and the bumper and the operating status of the man-carrying vehicle. 4.3.16 On a straight track with a slope of 3% to 5%, use a man-carrying vehicle with a rated load to collide with another man-carrying vehicle with a rated load at a speed of 2m/s along the slope, and repeat twice. 4.4 Main component test
4.4.1 Place the welded carriage chassis on the platform and measure the straightness and parallelism of both sides of the chassis and the flatness of the lower plane of the chassis. 4.4.2 Place the assembled steering gear upside down (wheel facing upward) on the platform or straight track, and measure the wheelbases on both sides based on the intersection of the center line of the two shafts and the inner flange of the wheel rim. 4.4.3 Measure the wheel rim distance of the two sets of steering gear wheels. 4.5 Main component test
4.5.1 Perform a breaking tensile test on the traction rod, pin shaft and three-link chain on the material testing machine and measure the breaking tensile value. 4.5.2 Compress the steering gear, connector and bumper springs three times with the test load (the maximum load allowed by the spring) on the spring testing machine, and measure the change in free height after the second and third compressions. 4.5.3 Measuring the size of the spring
Use a steel ruler to measure the height of the spring in a free state: a.
Use a ring gauge or a vernier caliper to measure the outer diameter of the spring; use a steel ruler and a wide-seat angle ruler to measure the verticality of the spring. In a no-load state, place the outer circle generatrix of one end of the spring close to the vertical surface of the wide-seat angle ruler, rotate it one circle, and measure the maximum size from the outer circle end of the spring (the adjacent circle position of 1/2 circle of the end) to the vertical surface of the angle ruler. Then check the other end. Measure the maximum value of the verticality △, as shown in the following figure: Spring verticality measurement diagram
5 Inspection rules
5.1 Factory inspection
5.1.1 Products should be inspected by the quality inspection department of the manufacturer, and they are allowed to leave the factory only after passing the inspection and issuing a certificate of conformity. 5.1.2 Factory inspection is divided into random inspection and full inspection, and the inspection items are carried out according to the provisions of Table 1. 5.2 Type inspection
5.2.1 Type inspection shall be conducted in any of the following cases: a.
Trial design and identification of new products or old products transferred to the factory for production; once every three years during normal production; after normal production, if there are major changes in results, materials, and processes that may affect product performance; when there are major differences between the factory inspection structure and the last type inspection: when production is suspended for more than two years and then resumed, when the national quality supervision department proposes a type inspection requirement. 5.2.2 Type inspection items shall be carried out in accordance with the provisions of Table 1. 5.3 Sampling
5.3.1 Two complete machines shall be selected for type inspection for tests 4.3.15 and 4.3.16. One of the remaining complete machine test items shall be selected for the test.
5.3.2 The number of parts and components to be tested is as follows: a.
Two traction rods
Two pins
Two three-link chains
Two springs each
Two sets of steering gears
f. Carriage chassis
MT389-1995
5.3.3 The type inspection shall be sampled from the qualified products of the factory inspection. 5.3.4 The sampling of the factory inspection shall be sampled from the same batch of products, and the number shall be the same as the type inspection items. 5.4 Judgment rules
5.4.1 Three items in Table 1, 3.2.13, 3.2.15, and 3.4.1, are key items. If one item fails, the product is judged as unqualified. 3.2.5, 3.2.7, 3.2.10, 3.2.12, 3.2.14, and 3.2.16 in Table 1 of 5.4.2 are the main items. If one item fails, the unqualified item shall be re-tested with double the quantity. If it still fails, the product shall be judged as unqualified. 3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.6, 3.2.8, 3.2.9, 3.2.11, 3.3.1, 3.3.2, 3.3.3, 3.4.2, and 3.4.3 in Table 1 of 5.4.3 are the secondary items. If three items fail, the unqualified items shall be re-tested with double the quantity. If two more items fail, the product shall be judged as unqualified.
Inspection category
Technical requirements clause
Note: “√\ indicates inspection, “-\ indicates no inspection. 382
Factory inspection
Type inspection
6 Marking, packaging, transportation and storage
6.1 Marking
MT389—1995
6.1.1 Each man-carriage shall have a nameplate fixed on a conspicuous position on the upper part of the end plate. The nameplate shall be made of brass plate or aluminum plate. 6.1.2
The content of the nameplate is as follows:
Product name, model,
Main technical parameters;
Product number;
Factory date;
Manufacturer name.
6.2 Packaging
Man-carriages are generally not packaged. For easily removable parts such as seats and backrests, they can be bundled and packaged according to user requirements. 6.2.2
The following documents should be attached to the man-carrying vehicle when it leaves the factory and should be sealed in a plastic bag. Instruction manual;
Product certificate;
List of wearing parts;
Delivery list.
6.3 Man-carrying vehicles should be placed stably during transportation, and fixed firmly and reliably to prevent collision damage. 6.4 Man-carrying vehicles should be stored in a dry and well-ventilated warehouse. If the storage period exceeds two years, regular inspections should be carried out, and man-carrying vehicles with severe rust and paint peeling should be re-rusted and repainted before leaving the factory.
Additional notes:
This standard was proposed by the China Coal Research Institute. This standard was drafted and coordinated by the Fushun Branch of the China Coal Research Institute. The main drafter of this standard is Li Yongan.
This standard is entrusted to the Fushun Branch of the China Coal Research Institute for interpretation. 3832 Factory inspection is divided into random inspection and full inspection, and the inspection items are carried out in accordance with the provisions of Table 1. 5.2 Type inspection
5.2.1 Type inspection should be carried out in any of the following situations: a.
Trial production and identification of new products or old products transferred to the factory for production; once every three years during normal production; after normal production, if there are major changes in results, materials, and processes that may affect product performance; when the factory inspection structure is significantly different from the last type inspection: when production is suspended for more than two years and then resumed, the national quality supervision department proposes a type inspection requirement. 5.2.2 Type inspection items are carried out in accordance with the provisions of Table 1. 5.3 Sampling
5.3.1 Two complete machines are selected for type inspection for tests 4.3.15 and 4.3.16. One of the remaining complete machine test items is selected for one.
5.3.2 The number of parts and components to be tested is as follows: a.
Two traction rods
Two pins
Two three-link chains
Two springs each
Two sets of steering gears
f. Carriage chassis
MT389-1995
5.3.3 The type inspection shall be sampled from the qualified products of the factory inspection. 5.3.4 The sampling of the factory inspection shall be sampled from the same batch of products, and the number shall be the same as the type inspection items. 5.4 Judgment rules
5.4.1 Three items in Table 1, 3.2.13, 3.2.15, and 3.4.1, are key items. If one item fails, the product is judged as unqualified. 3.2.5, 3.2.7, 3.2.10, 3.2.12, 3.2.14, and 3.2.16 in Table 1 of 5.4.2 are the main items. If one item fails, the unqualified item shall be re-tested with double the quantity. If it still fails, the product shall be judged as unqualified. 3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.6, 3.2.8, 3.2.9, 3.2.11, 3.3.1, 3.3.2, 3.3.3, 3.4.2, and 3.4.3 in Table 1 of 5.4.3 are the secondary items. If three items fail, the unqualified items shall be re-tested with double the quantity. If two more items fail, the product shall be judged as unqualified.
Inspection category
Technical requirements clause
Note: “√\ indicates inspection, “-\ indicates no inspection. 382
Factory inspection
Type inspection
6 Marking, packaging, transportation and storage
6.1 Marking
MT389—1995
6.1.1 Each man-carriage shall have a nameplate fixed on a conspicuous position on the upper part of the end plate. The nameplate shall be made of brass plate or aluminum plate. 6.1.2
The content of the nameplate is as follows:
Product name, model,
Main technical parameters;
Product number;
Factory date;
Manufacturer name.
6.2 Packaging
Man-carriages are generally not packaged. For easily removable parts such as seats and backrests, they can be bundled and packaged according to user requirements. 6.2.2
The following documents should be attached to the man-carrying vehicle when it leaves the factory and should be sealed in a plastic bag. Instruction manual;
Product certificate;
List of wearing parts;
Delivery list.
6.3 Man-carrying vehicles should be placed stably during transportation, and fixed firmly and reliably to prevent collision damage. 6.4 Man-carrying vehicles should be stored in a dry and well-ventilated warehouse. If the storage period exceeds two years, regular inspections should be carried out, and man-carrying vehicles with severe rust and paint peeling should be re-rusted and repainted before leaving the factory.
Additional notes:
This standard was proposed by the China Coal Research Institute. This standard was drafted and coordinated by the Fushun Branch of the China Coal Research Institute. The main drafter of this standard is Li Yongan.
This standard is entrusted to the Fushun Branch of the China Coal Research Institute for interpretation. 3832 Factory inspection is divided into random inspection and full inspection, and the inspection items are carried out in accordance with the provisions of Table 1. 5.2 Type inspection
5.2.1 Type inspection should be carried out in any of the following situations: a.
Trial production and identification of new products or old products transferred to the factory for production; once every three years during normal production; after normal production, if there are major changes in results, materials, and processes that may affect product performance; when the factory inspection structure is significantly different from the last type inspection: when production is suspended for more than two years and then resumed, the national quality supervision department proposes a type inspection requirement. 5.2.2 Type inspection items are carried out in accordance with the provisions of Table 1. 5.3 Sampling
5.3.1 Two complete machines are selected for type inspection for tests 4.3.15 and 4.3.16. One of the remaining complete machine test items is selected for one.
5.3.2 The number of parts and components to be tested is as follows: a.
Two traction rods
Two pins
Two three-link chains
Two springs each
Two sets of steering gears
f. Carriage chassis
MT389-1995
5.3.3 The type inspection shall be sampled from the qualified products of the factory inspection. 5.3.4 The sampling of the factory inspection shall be sampled from the same batch of products, and the number shall be the same as the type inspection items. 5.4 Judgment rules
5.4.1 Three items in Table 1, 3.2.13, 3.2.15, and 3.4.1, are key items. If one item fails, the product is judged as unqualified. 3.2.5, 3.2.7, 3.2.10, 3.2.12, 3.2.14, and 3.2.16 in Table 1 of 5.4.2 are the main items. If one item fails, the unqualified item shall be re-tested with double the quantity. If it still fails, the product shall be judged as unqualified. 3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.6, 3.2.8, 3.2.9, 3.2.11, 3.3.1, 3.3.2, 3.3.3, 3.4.2, and 3.4.3 in Table 1 of 5.4.3 are the secondary items. If three items fail, the unqualified items shall be re-tested with double the quantity. If two more items fail, the product shall be judged as unqualified.
Inspection category
Technical requirements clause
Note: “√\ indicates inspection, “-\ indicates no inspection. 382
Factory inspection
Type inspection
6 Marking, packaging, transportation and storage
6.1 Marking
MT389—1995
6.1.1 Each man-carriage shall have a nameplate fixed on a conspicuous position on the upper part of the end plate. The nameplate shall be made of brass plate or aluminum plate. 6.1.2
The content of the nameplate is as follows:
Product name, model,
Main technical parameters;
Product number;
Factory date;
Manufacturer name.
6.2 Packaging
Man-carriages are generally not packaged. For easily removable parts such as seats and backrests, they can be bundled and packaged according to user requirements. 6.2.2
The following documents should be attached to the man-carrying vehicle when it leaves the factory and should be sealed in a plastic bag. Instruction manual;
Product certificate;
List of wearing parts;
Delivery list.
6.3 Man-carrying vehicles should be placed stably during transportation, and fixed firmly and reliably to prevent collision damage. 6.4 Man-carrying vehicles should be stored in a dry and well-ventilated warehouse. If the storage period exceeds two years, regular inspections should be carried out, and man-carrying vehicles with severe rust and paint peeling should be re-rusted and repainted before leaving the factory.
Additional notes:
This standard was proposed by the China Coal Research Institute. This standard was drafted and coordinated by the Fushun Branch of the China Coal Research Institute. The main drafter of this standard is Li Yongan.
This standard is entrusted to the Fushun Branch of the China Coal Research Institute for interpretation. 383
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