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A method for rapidly cooling scrapped nylon sleeves in concrete pillows

A nylon casing, fast technology, applied in the direction of laying tracks, roads, tracks, etc., can solve the problems of casing maintenance failure, operational safety threats, low casing extraction efficiency, etc.

Inactive Publication Date: 2014-10-15
NANYANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the heating process, it often happens that the heating temperature is too high and the nylon sleeve is ignited
In addition, the heating time is long, and the sleeve removal efficiency is low
Therefore, the existing removal method has the threat to the safety of train operation, is easy to damage the cement thread in the original concrete pillow hole, and has nylon fragments bonded in the original concrete pillow hole, resulting in casing maintenance failure, low maintenance efficiency and high labor intensity. insufficient

Method used

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  • A method for rapidly cooling scrapped nylon sleeves in concrete pillows
  • A method for rapidly cooling scrapped nylon sleeves in concrete pillows
  • A method for rapidly cooling scrapped nylon sleeves in concrete pillows

Examples

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Embodiment Construction

[0021] Such as figure 1 , 2 , The special drilling jig shown in 3 and 4 for quick cold extraction of scrapped nylon sleeves in concrete pillows has a disc-shaped jig body 2, four drill sleeves 1 are evenly arranged on the jig body, and one side of the jig body faces outward. There is a positioning boss 3 that matches the light hole on the upper part of the inner cavity of the nylon sleeve 8. The positioning boss 3 is extended with a guide rod 5 that is inserted into the inner cavity of the nylon sleeve 8. The outer circumference of the guide rod is provided with an arc-shaped concave hole that is concentric with the drill sleeve. Slot 4. The diameter of the guide rod matches the diameter of the inner cavity of the nylon sleeve, and the diameter 6 of the circumscribed circle of the arc groove of the guide rod is smaller than the minor diameter of the outer arc thread of the nylon sleeve. The end of the guide rod is tapered for easy insertion.

[0022] A method for quickly co...

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Abstract

The invention discloses a method for rapidly cold-extracting a scrapped nylon sleeve in a concrete sleeper and a special drill jig. The method comprises the following steps of: adopting a stepwise working method, namely, drilling a plurality of key slots in the inner wall of the scrapped nylon sleeve at first, and then clamping wedges in the inner cavity of the scrapped nylon sleeve along the plurality of key slots, then locking the wedges by a torque wrench to loosen the scrapped nylon sleeve relative to the concrete sleeper until the scrapped nylon sleeve is unscrewed out of the concrete sleeper. The special drill jig is provided with a drill jig body, wherein drill bushings are arranged on the drill jig body; and the special drill jig is characterized in that the drill bushings are uniformly distributed on the drill jig body, a location boss matched with an unthreaded hole in the upper part of the inner cavity of the nylon sleeve extends outwards from one side of the drill jig body, a guide rod inserted in the inner cavity of the nylon sleeve extends from the location boss, and arc-shaped grooves concentric with the drill bushings are formed in the periphery of the guide rod. The whole operation method is simple and reliable, and free from damages on cement internal threads in the nylon sleeve and the concrete sleeper, thus guaranteeing time-saving, labour-saving and high-efficiency replacement of a new nylon sleeve.

Description

technical field [0001] The invention belongs to the technical field of railway traffic, and in particular relates to a method for quickly cold-taking scrapped nylon sleeves in concrete pillows and a special drilling mold thereof. Background technique [0002] The nylon casing of the concrete pillow is cast in the concrete pillow, and the pressing plate presses the rail on the concrete pillow through bolts fastened in the nylon casing. The part of the backing plate of the speed-up turnout and the nylon bushing of part of the turnout near the straight section of the wheel guard rail will swell due to the corrosion of the bolts. When there is an empty hanging plate, when the train is crushed, the sleeper bolts at the non-stressed straight (curved) strands of the rail are pulled out to make the nylon sleeve invalid. It is necessary to take out the failed nylon sleeve from the concrete pillow, and install a new nylon sleeve in the place of the original nylon sleeve. [0003] Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01B31/26
Inventor 杜新宇王林鸿毛翠丽魏飞
Owner NANYANG INST OF TECH
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