GB 16542-1996 Technical requirements for safety of tank cages

This standard specifies the main technical conditions and inspection methods for the design, manufacture and use of tank cages. This standard applies to the design, manufacture, use and inspection of tank cages. GB 16542-1996 Technical requirements for tank cage safety GB16542-1996 Standard download decompression password: www.bzxz.net

16542-1996
In order to ensure the safety of personnel in the cage, this standard specifies the safety technical requirements for the design, manufacture and use of cages for shaft hoisting. Appendix A of this standard is a reminder appendix.
This standard is proposed and managed by the Ministry of Labor of the People's Republic of China. The responsible drafting unit of this standard: Safety and Environmental Protection Research Institute of the Ministry of Metallurgical Industry. The participating drafting unit of this standard: Xuzhou Coal Mine Safety Equipment Manufacturing Co., Ltd. The main drafters of this standard: Zhang Zhongqi, Li Xiaofei, Pang Qizhi, Wang Honghan, Su Liangjun, Xue Xiaoguang, Zhou Hao, Ni Shouqiang, Zheng Xien, Zhang Baoyuan.
1 Scope
National Standard of the People's Republic of China
Safety technical requirements for cages
Safety technical requirements for cages This standard specifies the main technical conditions and inspection methods for the design, manufacture and use of cages. This standard applies to the design, manufacture, use and inspection of cages. 2 Reference standards
GB16542—1996
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 the parties using this standard should explore the possibility of using the latest versions of the following standards. GB3323-87 Radiography and quality classification of steel fusion welded butt joints GB/T3633-1995 Technical conditions for torsion shear type high strength bolted joints for steel structures GB11345-89 Manual ultrasonic flaw detection methods and flaw detection result classification for steel welds GB/T14952.1-94 Evaluation of sealing quality of anodic oxide film of aluminum and aluminum alloys by phosphorus-chromic acid method GB/T14952.2-94 Evaluation of sealing quality of anodic oxide film of aluminum and aluminum alloys by acid leaching method GB16424-1996 Safety regulations for metal and non-metal underground mines GB16541-1996 Safety technical requirements for signal systems for vertical shaft cage hoisting 3 Definitions
This standard adopts the following definitions.
3.1 Cage
Container for lifting ore (coal), waste rock (grinding stone) and personnel, materials and equipment in vertical shafts. 3.2 Cage main body
The main body of the cage excluding the head and tail rope suspension devices, guide devices and anti-fall devices. 3.3 Suspension assemblies The general term for the head rope suspension device and the tail rope suspension device. 3.3.1 Head rope suspension assemblies The connection device between the tank body and the head rope (lifting wire rope). 3.3.2 Tail rope suspension assemblies The connection device between the tail rope (balancing wire rope) and the bottom of the tank body. 3.4 Conveyance guide assemblies The general term for roller tank ears, sliding guide sleeves and sliding tank ears. 3.4.1 Rolling guide shoes The rolling guide parts for the normal operation of the cage along the rigid tankway. 3.4.2 Sliding guide sleeve Sliding guide sleeve Approved by the State Administration of Technical Supervision on September 25, 1996 300
Implemented on March 1, 1997
GB16542—1996
Sliding guide for the cage to operate normally along the flexible tankway. 3.4.3 Sliding guide shoes Sliding guide for the cage to guide during operation, stabilize the tank when entering and exiting the vehicle, and enter the wedge-shaped tankway for safety when overwinding or over-releasing.
3.5 Cagedog
Cagedog A protective device to prevent the cage from falling when the lifting wire rope or its suspension device breaks. 3.6 Braking rope Braking rope When the cage is in action, the wire rope for the capture mechanism to capture. 3.7 Buffer rope bufferrope
After the cage falls, it is used to absorb the kinetic energy of the falling cage to ensure the smooth braking process of the cage. 4 Technical requirements
4.1 General provisions
4.1.1 The cage shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 4.1.2 Each cage shall be equipped with a nameplate made of soft aluminum plate in a conspicuous position. The nameplate content includes: cage model, overall dimensions, rated load, deadweight, number of passengers allowed, manufacturing unit, production date, etc. 4.1.3 A removable safety canopy (protective umbrella) and railings shall be installed on the top of the cage. 4.1.4 The materials used for the cage must comply with the relevant technical regulations of national and industry standards and have a certificate of conformity from the supplier. It is allowed to replace with materials with performance not lower than that specified in this standard. The material substitution of major parts must be approved by the design unit. 4.1.5 After material substitution, the manufacturer shall provide the user with the model, specification of the substitute material and the original material, as well as the weight increased or decreased by the cage due to material substitution, and measure the actual weight of the cage and record it on the nameplate. 4.1.6 The suspension device and the fall arrester shall be manufactured by the unit that has obtained the safety device production license issued by the relevant national departments. 4.1.7 When the water spraying volume of the wellbore exceeds 5m/h, an arc-shaped water spraying shed shall be installed on the top of the tank body. 4.1.8 Except for the side panels, pan cover, safety awning and water spraying shed, they must be made of whole materials. 4.1.9 All bent, forged and stamped parts shall not have defects such as cracks, fractures and pitting. 4.1.10 The welds shall be smooth and neat, and there shall be no defects such as burn-through, cracks, arc pits, etc. 4.1.11 The rivets shall be firm and complete, and there shall be no defects such as skewness, cracks, looseness, etc. 4.1.12 All parts of the cage must be inspected and qualified, and purchased and outsourced parts must have certificates of conformity before assembly. 4.1.13 When parts are connected by high-strength bolts, they shall comply with the provisions of GB/T3633. 4.1.14 Except for the contact surfaces of components at the high-strength bolt connection, parts and components must be treated for corrosion protection before assembly. The steel-aluminum joints of aluminum alloy cages should be treated to prevent electrochemical corrosion; when anodizing, the sealing quality assessment of the oxide film should comply with the relevant provisions of GB/T14952.1 and GB/T14952.2. 4.1.15 After the cage is assembled, all parts and components that move relative to each other should be flexible and in place without obstruction. 4.2 Tank body
4.2.1 The manufacture of the tank body and the materials used shall comply with the following provisions: - The frame shall be made of steel or aluminum alloy that has passed the strength check; when aluminum alloy is used, in addition to meeting the strength requirements, the compression rods shall also meet the stability requirements; - The side walls of the tank body shall be made of steel plates with a thickness of not less than 2.5mm (not less than 1.5mm in coal mines) or aluminum alloy plates with equal strength; the side walls of the tank body close to the tank channel are prohibited from using perforated plates; the bottom of the tank should be able to withstand the impact force and stress generated during normal or emergency landing; and it should be fully covered with non-porous patterned steel plates with a thickness of not less than 4mm or non-porous aluminum alloy plates with equal strength; the connecting crossbeams in each chord beam of the tank body should be arranged as much as possible in the position that bears the pressure of the mine wheel, and the spacing of the crossbeams is determined according to the bearing capacity of the plates laid on the chord beams.
4.2.2 The internal dimensions of the tank shall comply with the following provisions: GB16542--1996
The net height of the top layer of a single-layer or multi-layer cage (except the main pull rod with spring) shall not be less than 1.9m, and the net height of other layers shall not be less than 1.8m;
-When lifting personnel, the floor area occupied by each person shall not be less than 0.2m2 according to the number of passengers allowed; -When lifting a mine car, the minimum safety gap between the mine car and both sides of the tank body shall not be less than 50mm for a fixed car; and not less than 75mm for a flip car. The minimum safety gap between the mine car and both ends of the tank body shall not be less than 100mm. 4.2.3 Handrails for passengers to hold on to shall be set on both sides of the tank body. The connection strength between the handrail and the tank body shall be determined by the designer based on its stress condition. The setting height of the handrail shall be 1600mm±50mm. 4.2.4 The cage door shall comply with the following provisions:
The cage door shall be made of steel or aluminum alloy; The form of the cage door shall be determined by mutual consultation between the design and the user; - The cage door shall not open outwards;
The cage door shall have a locking device to prevent it from opening automatically due to shaking or vibration; After the cage door is closed, its upper edge shall not be less than 1200mm from the bottom plate of the tank body; the lower edge shall not be more than 250mm from the bottom plate of the tank body; The distance between the horizontal and vertical bars shall not be greater than 200mm. 4.2.5 For the cage of the mine car, a sturdy and reliable car blocker must be installed in the tank body, and the blocking claw of the car blocker shall not open automatically when blocking the car. When using a rubber block type car blocker, it must have sufficient strength and rigidity. When using a car blocker with a connecting rod device, an inspection hole must be set on the bottom plate of the tank body, and the inspection hole shall be closed with a steel plate with a thickness of not less than 4mm. 4.2.6. A cover door shall be provided on the top of the tank body, and a manhole shall be provided on the middle partition of the multi-layer tank cage. The cover door and the manhole shall be closed with an openable steel plate with a thickness of not less than 4mm.
4.2.7. Tracks shall be laid on the bottom plate of the tank body for the mine car, and guardrails of the same length as the tracks shall be laid to prevent the mine car in the tank from falling off the track. The overlapping parts of the track and the rocking table shall be wear-resistant, impact-resistant and easy to replace. 4.2.8. When the tank body is welded, the weld strength of its main force-bearing connection point shall not be lower than the strength of the parent material. 4.2.9. The eccentric moment of the tank body shall not be greater than 200N·m. 4.3.1. The main parts such as the connecting fork, reversing fork, pin shaft, inner and outer side plates shall be inspected by a flaw detector. The inspection content shall comply with the provisions of the relevant national standards, and the flaw detection inspection report shall be filled in and the parts shall be marked. 4.3.2. The suspension device shall be symmetrically balanced with the center line of the lifting wire rope as the axis (except for the wedge-shaped rope clamp). 4.3.3 When using a wedge-shaped rope clamp, the wedge angle formed by the rope groove between the two clamps after installation must be consistent with the rope groove angle of the wedge-shaped rope ring, and the deviation shall not exceed 20°; the size deviation of the distance between the clamp, the rope ring and the bottom of the rope groove shall not exceed 1mm; the limit plate shall be tightened with high-strength bolts after tightening the wire rope to prevent the wedge-shaped rope ring from loosening. 4.3.4 The safety factor of the head rope suspension device shall comply with the following provisions: When the tank cage is used exclusively for lifting personnel or for both lifting personnel and lifting materials, the main connecting parts, safety chains or other types of safety devices shall not be less than 13;
When the tank cage is used exclusively for lifting materials, the main connecting parts, safety chains or other types of safety devices shall not be less than 10. When calculating the safety factor of the safety chain, it is assumed that each chain bears the total weight of the cage and its load evenly, and the inclination angle of the chain should be considered.
4.3.5 When using the pad type or spiral hydraulic type rope adjustment method, the operating pressure of the dry jack, quick connector, hose, connecting vessel, oil pump, etc. required by the head rope suspension device shall not be less than 56MPa for the pad type and 7.84MPa for the spiral hydraulic type. There shall be no oil leakage during use. 4.3.6 The installed safety chain shall not be twisted or knotted. The length of the single-rope lifting safety chain shall be 6 to 8 mm larger than the straight-line distance between the center holes at both ends. When the multi-rope lifting single-point suspension is used, the setting of the safety chain shall be determined by the designer. 4.3.7 The tail rope suspension device shall comply with the following provisions: - The number of wire ropes that can be connected shall not be less than 2; 302
GB16542--1996
When the tank cage is used exclusively for lifting personnel or for both lifting personnel and lifting materials, the safety factor of the main connecting part shall not be less than 13; when the tank cage is used exclusively for lifting materials, it shall not be less than 10; - The rotating part of the round tail rope suspension device shall be injected with sufficient waterproof and pressure-resistant grease during assembly, and the rope head connection sleeve must rotate flexibly. The inner surface of the sleeve shall be smooth to reduce wear on the tail rope; - The contact surface between the symmetrical rope ring of the flat tail rope suspension device and the flat steel wire rope shall be polished and smooth, and there shall be no defects such as sand sticking, holes, cracks, etc. 4.3.8 Before using a new or replaced set of suspension devices, an external load (static load) test shall be carried out, and it can only be put into use after passing the test. 4.4 Guide device
4.4.1 The gap between the guide device and the tankway shall meet the following requirements: For rail tankway, the gap shall not exceed 5mm on each side;
For wooden tankway, the gap shall not exceed 10mm on each side; For wire rope tankway, the inner diameter of the sliding guide sleeve shall be 2-5mm larger than the diameter of the tankway rope; When the steel rail tankway is arranged on one side of a cage, the gap between the outer edge of the guide device and the fixed tankway device on the tankway beam shall not be less than 20mm; For the combined steel tankway with roller lugs, the gap on each side of the sliding lug shall be maintained at 10-15mm. 4.4.2 The roller lugs shall meet the following requirements: The roller material shall be polyurethane rubber;
When assembling, the bearings shall be filled with rolling bearing grease; -- The buffer device shall use a disc spring group, and the total buffer stroke shall not exceed the requirements of Table 1; The maximum horizontal force borne by the roller lug shall be calculated as 1/24 of the total weight of the cage (self-weight load weight), which shall meet the requirements of Table 1. Table 1 Basic parameters of roller ears
Roller diameter,
Basic parameters
Maximum horizontal force.kN
Buffer stroke.mm
(Double-row wheels)
(Double-row wheels)
4.5 Fall arrester
4.5.1 A single-rope lifting cage used exclusively for lifting personnel or for both lifting personnel and materials must be equipped with a reliable fall arrester.
4.5.2 The safety of the person must be ensured during the arrest and braking process of the fall arrester, that is, at the minimum terminal load (equivalent to only one person in the tank), the maximum allowable negative acceleration shall not exceed 50m/s2, and the duration of the negative acceleration shall not exceed 0.25s; at the maximum terminal load, the negative acceleration of the wire rope brake fall arrester shall not be less than 10m/s, and the wooden tank road fall arrester shall not be less than 5m/s2. 4.5.3 The main pull rod with spring must be equipped with a protective sleeve or other limit device. 4.5.4 The safety factor of the main pull rod shall not be less than 13; the safety factor of other parts shall not be less than 2 according to the yield limit; for materials without yield limit, the safety factor shall not be less than 5 according to the ultimate strength. 4.5.5 The main force-bearing parts of the fall arrester shall not be made of cast steel, cast iron, or cast copper, and the main forged parts shall also be subjected to non-destructive testing. 4.5.6 The idle travel time of the fall arrester (the time from the moment of rope breaking to the start of braking) shall not exceed 0.25s. 4.5.7 The action time difference of the two sets of arresting mechanisms during braking shall be expressed by the distance the cage passes and shall not exceed 0.5m. 4.5.8 The safety factor of the brake rope of the fall arrester shall not be less than 3 when calculated by dynamic load and shall not be less than 6 when calculated by static load. When the cage is operating normally, the gap between the brake rope and the wedge in the arresting mechanism shall be maintained at 5~8mm. 4.5.9 The safety factor of the buffer rope shall not be less than 3 when calculated by dynamic load and shall not be less than 6 when calculated by static load; the remaining length of the buffer rope shall be 2~3 times the braking distance; the end of the buffer rope must be cast into a cone shape with babbitt alloy to prevent the buffer rope from escaping from the buffer during braking. 4.5.10 The fall arrester must be subjected to an unhooking test to confirm that the action is reliable before it can be put into use. 303
5 Requirements for use
GB16542--1996
5.1 The rated load, maximum load and number of passengers allowed for the cage shall be announced at the wellhead, and overloading is strictly prohibited. 5.2 It is prohibited to lift personnel and materials at the same level of the cage at the same time. When lifting explosive materials, there should be a dedicated person to supervise. 5.3 For mixed wells without isolation facilities, the skip hoisting system should stop running during the time when the cage is lifting personnel. 5.4 The guide device should be replaced when the wear reaches the following levels: one side of the sliding lug is worn more than 8mm;
the total wear of the rail tank track and the sliding lug on the same side reaches 10mm; the wear of the sliding guide sleeve exceeds 8mm;
the volume of the rubber wheel wear of the roller lug exceeds the calculated value of formula (1). v=axs
Where: V-volume of wear, cm\;
α-——wear coefficient, take 0.03, cm2/km; S-accumulated value of the actual running distance of the rubber wheel under test, km. (1)
5.5 For the cage hoisting system using a wire rope tankway or a single-side steel tankway, a tank stabilizing device must be installed at the wellhead, well bottom and the middle sections (horizontally). 5.6 The personnel riding the tank should wait for the tank 5m away from the well casing, must strictly abide by the tank riding system, and obey the command of the signalman. When lifting personnel, the cage door should be closed and the use of the tank seat is strictly prohibited.
5.7 When personnel stand on the top cover of the empty tank cage to inspect and check the manhole facilities, the following safety protection measures must be taken: the parallel port and each middle (horizontal) horse head door must be guarded by a person, and no objects must be dropped: a)
b) There is a special signal device on the tank cage;
Must work under the safety tent;
d) Must wear a safety belt, which is firmly tied to the lifting wire rope; When inspecting the manhole, the lifting speed must not exceed 0.3m/s. e)
5.8 The tank cage lifting system must be equipped with an overwinding protection device and a buffer device, and the overwinding height should meet the following requirements: when the lifting speed is lower than 3m/s, it shall not be less than 4m; when the lifting speed is 3~6m/s, it shall not be less than 6m; when the lifting speed is 6~10m/s (excluding 6m/s), it shall not be less than the lifting height of 1s under the maximum lifting speed; when the lifting speed is higher than 10m/s, it shall be greater than 10m. 5.9 The cage hoisting signal system shall comply with the relevant provisions of GB16541. 5.10 The tank body, suspension device, anti-drop device, guide device, tank internal car blocker, etc. shall be inspected once per shift, once a week by the workshop equipment manager, and once a month by the mine electrical and mechanical section chief (or mechanic); any problems found shall be dealt with immediately, and the inspection and handling results shall be recorded in the hoisting device record book.
5.11 The main beam (suspension plate), suspension device, anti-drop device main pull rod, etc. shall be inspected at least once a year. 5.12 The fall arrester in use should be cleaned and tested for non-unhooking every six months, and tested for unhooking once a year. The various connections and transmission parts of the fall arrester must always be in a flexible state. In winter in cold areas, antifreeze lubricating oil should be used on the lubricating parts of the fall arrester. The catcher must be replaced when the cross-section decreases by 20%. The guide sleeve lining must be replaced when the wear on each side exceeds 3mm. 5.13: The brake rope should be tightened regularly.
5.14 The safety doors, receiving devices and car arresters at the wellhead, well bottom and middle sections (horizontal) must be interlocked with the cage stop position. 5.15 The acceleration (deceleration) speed of the cage lift shall not exceed 0.75m/s2, and the maximum speed shall not exceed the value calculated by formula (2), and shall not exceed 12m/s.
Where: V maximum speed.m/s;
Lifting height,m.
（2）
GB 16542--1996
When lifting materials, the maximum speed shall not exceed the value calculated by formula (3). V - 0. 6 VH
Where: V-maximum speed, m/s;
H-lifting height, m.
5.16 If any part of the suspension device breaks, all the fragments of the broken parts that can be collected shall be kept for inspection by the supervisor designated by the mine manager or the personnel designated by the competent department, and corresponding improvement measures shall be proposed based on the inspection results. 6 Inspection rules and inspection methods
6.1 Inspection rules
6.1.1 Each cage must be inspected and qualified by the quality inspection department of the manufacturer and accompanied by a product quality certificate before it can leave the factory. 6.1.2 The inspection of the cage is divided into factory inspection and on-site inspection. For the cage transported as a whole, only the factory inspection shall be carried out; for the cage transported in pieces, the on-site inspection shall be added. See Table 2 for details. Table 2 Inspection Items
Inspection Items
Main inspection of cage
Riveting quality inspection
Welding quality inspection
High-strength bolt connection quality inspection
Contact surface friction coefficient test at high-strength bolt connectionGeometric dimension inspection
Moving parts inspection
Balance test of cage hoisting
Substitute material inspection
Painting quality inspection
Hanging tank debugging
Inspection of high-strength bolts during cage operationInspection of actual wear of roller tank ear rubber wheelExternal load test of suspension device
"√" in the table indicates that the item is inspected at the factory. "A\" in the table indicates that the item is inspected on site.2
3"×\" in the table indicates that the item is not inspected. Factory inspection
Inspection type
On-site inspection
6.1.3 The operation inspection of the cage shall be carried out on-site by the user. The manufacturing quality problems that occur during the trial operation shall be handled by the manufacturer. 6.1.4 The user has the right to inspect whether the quality of the cage meets the requirements in accordance with the provisions of this standard. If there is any objection, it shall be arbitrated by the relevant supervisory department. 6.2 Inspection method
6.2.1 The main beam (suspension plate) shall be subjected to non-destructive testing and a flaw detection report shall be submitted. 6.2.2 Rivet inspection method:
-According to the diameter of the rivet, a small hammer of 0.25 to 0.4 kg shall be used for knocking inspection; 305
-Use a template to check the size of the nail head.
GB 16542-1996
6.2.2.1 Visually inspect the appearance quality of the rivet and check whether the rivet head has defects such as cracks, incompleteness, distortion and deformation. 6.2.2.2 Unqualified rivets should be scraped off and re-riveted, but the number of defective rivets replaced shall not exceed 20% of the total number of rivets in this node. 6.2.2.3 After riveting, the tightness between parts can be checked with a 0.1mm feeler gauge. Rivets that are not tight must be scraped off and re-riveted. The method of baking rivets shall not be used for secondary riveting. 6.2.3 The quality inspection of welds shall comply with the following regulations: 1. The appearance inspection of welds shall be carried out before painting; 1. Visual inspection or use a 10x magnifying glass to check whether there are cracks, slag inclusions, burn-through, spatter residues, weld bumps or incomplete welding, incomplete penetration and other defects.
1. The quality of welds at the main force-bearing connection points of the tank body shall be inspected by non-destructive testing. The radiographic flaw detection shall not be lower than level 1 in the defect classification of GB3323, and the ultrasonic flaw detection shall not be lower than level 1 in the defect classification of GB11345 (inspection level is B), and a flaw detection report shall be submitted. : 6.2.4 High-strength bolts with any of the following conditions should be subject to torque coefficient inspection: 1. The purchased bolts do not have a specified torque coefficient range; 2. The purchased bolts have a specified torque coefficient, but the service time has exceeded the warranty period! 3. The torque coefficient is unstable during installation. During the inspection, take 5 high-strength bolts, install them on the axial force measuring device one by one, and use a torque wrench to rotate them. When the axial force measuring device reaches the design specified preload, read the torque value, and calculate the torque coefficient based on the preload and torque value. If the torque coefficients of the 5 high-strength bolts measured are stable between 0.11 and 0.15, and their standard deviation is less than 0.10, the conventional torque method can be used for construction.
When the torque coefficient range of the measured high-strength bolts changes, the torque value can be calculated according to the average value of the measured torque coefficient, and it can be used as the basis for the torque method construction. For bolts from different batches, different times, and different placement conditions, their torque coefficients should be measured separately, and the torque values ​​should be determined before construction.
6.2.5 The external load test of the suspension device shall be carried out on a special test bench. The test load shall be 0.2 times the design failure load and the loading time shall be not less than 20 minutes. During the test, there shall be no movement at the connection of the wire rope, and all load-bearing parts shall not be deformed or damaged. The test results and treatment conditions shall be recorded and archived.
6.2.6 When installing the hanging tank on site, adjust the pressure between the roller (when using roller tank ears) and the tank channel, measure the gap between the guide device and the tank channel, and it shall comply with the provisions of 4.4.1.
6.2.7 The inspection of the fall arrester shall comply with the following provisions: a) Preparation before inspection Before inspection, the derrick, buffer rope, tankway (brake rope), suspension device, capture mechanism, drive spring and brake rope tensioning device shall be inspected in detail. Parts that are worn out and no longer meet the requirements shall be replaced; b) Inspection inspection Place the tank cage on the wellhead support or cover, loosen the lifting wire rope, and check the action of the capture mechanism: under the action of the drive spring, the lever should lift the sliding wedge and clamp the brake rope, measure the vertical stroke of the sliding wedge, and adjust it if it does not meet the requirements. Such inspection should be repeated at least three times,
c) Static load inspection Pull out the fixing pin of the connecting device, at this time the drive spring acts to make the sliding wedge of the capture mechanism contact the tankway (brake rope): lift the tank cage 600-700mm and stop, then lower the tank cage, after the capture device slides on the tankway (brake rope) for a distance, the brake rope is clamped by the sliding wedge. The sliding distance of the wire rope brake anti-fall device shall not exceed 40mm, and the sliding distance of the wooden tankway anti-fall device shall not exceed 200mm. The same process should be repeated at least three times, and the lifting height each time should be greater than the previous time to avoid catching the tankway (brake rope) at the same position. When making this inspection, the buffer rope shall not be pulled in the buffer. If there is any pulling phenomenon, the screw of the buffer must be adjusted until there is no pulling; d) Unhooking test The unhooking test should be carried out after the static load test is passed. During the inspection, sleepers are laid on the closed wellhead steel beam, and some soft materials are placed on the sleepers. The four corners of the tank body are supported and reinforced with wooden columns. The unhooking device is connected between the connecting device and the main pull rod. Finally, the tank cage is lifted to 1500mm above the wellhead closure, and the unhooking device is opened. After the seam cage stops, the sliding distance of the capture mechanism along the tankway (brake rope) is measured (excluding the stretching length of the brake rope). If the sliding distance of the wire rope brake fall arrester exceeds 150mm or the drop height of the cage relative to the derrick exceeds 400mm, and the sliding distance of the wooden tank road fall arrester exceeds 400mm, it should be adjusted and re-tested. 306
GB16542--1996
The unhooking test should be repeated three times: once with the minimum load (equivalent to only one person in the tank); once with the load equivalent to a full load of people; and the last time with the maximum load. e) After the test, the lifting wire rope should be tightened to restore the capture mechanism to normal operation; tighten the brake rope and check the tightening device; oil the capture mechanism, buffer and brake rope. 6.2.8 The following provisions shall be observed for the inspection of high-strength bolts of cages in use: 1. If the components are found to be slipping, the paint film is pulled apart or rust is leaking during visual inspection, it indicates that most of the high-strength bolts at the connection are under-tightened; if the paint film around the individual bolt heads or nuts is found to be cracked and detached or rust is leaking, it indicates that the bolts are seriously under-tightened or missed; 2. If the bolts are found to be about 0.Use a 25kg hammer to hit one side of the nut, and press the other side with your finger. If you feel a large vibration, the bolt is under-tightened. Mark the relative positions between the bolt and nut, the connector and the node plate, the nut, the washer, the node plate or the connector with white paint and check the relative position change and slippage between them frequently. Remove the under-tightened and loose high-strength bolts, clean and remove rust, and then repair them according to the specified process. 6.2.9 The actual wear of the roller tank ear rubber wheel is checked by water measurement method: put the unrunning rubber wheel and the running rubber wheel into the water tank one after another, measure the volume of the water level difference, and the result should meet the requirements of 5.4. 307
GB 16542--1996
Appendix A
(Suggested Appendix)
Xinkao Data
MT232—911t Mine Car Shaft Multi-Rope Cage
MT233-911.5t Mine Car Shaft Multi-Rope CageMT236--91 Combined Steel Tankway Roller Lug
MT 237.1—91
MT 237.2—91
MT 237.3—91
MT 237. 4—91
MT 237.5—91bZxz.net
B-type wire rope suspension device
Multi-rope lifting container
Multi-rope lifting container
Multi-rope lifting container
Multi-rope lifting container
Multi-rope lifting container
B-type wire rope suspension device
B-type wire rope suspension device
B-type wire rope suspension device
Wedge-shaped rope clamp
Block-type head rope suspension device
Round tail rope suspension device
Flat tail rope suspension device
Technical conditions
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