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A T-shaped head and its stud installation method

A technology of stud bolts and plugs, which is applied in the field of electric locomotive transformer installation, can solve the problems of insufficient installation torque, affecting the running quality of the locomotive, and affecting the tightening torque, etc.

Active Publication Date: 2022-07-12
CRRC DALIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is friction between the insulating plug 4 and the T-shaped head 1, which seriously affects the tightening torque between the three
Insufficient installation torque of stud bolt 3 and T-shaped head 1 will seriously affect the running quality of the locomotive

Method used

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  • A T-shaped head and its stud installation method
  • A T-shaped head and its stud installation method
  • A T-shaped head and its stud installation method

Examples

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Embodiment 1

[0047] like Figure 4-Figure 6 As shown, this embodiment discloses a method for installing the T-shaped head 1, including:

[0048] Wrap the insulating plug well with a dust-free wipe and set it aside. During the whole process, the insulating plug is required not to directly contact the ground and dust.

[0049] Use a dust-free wiping cloth and anhydrous ethanol to wipe off the grease inside the boot cover 2 and the insulating plug, and then apply new grease on the surface of the insulating plug 4 and the inner surface of the boot cover 2.

[0050] Install stud bolts 3 and insulating plugs:

[0051] Install the short end of the stud bolt 3 and the insulating plug first.

[0052] The stopper washer is installed on the long end side of the stud bolt 3, and the conical surface of the stopper washer faces the stud bolt 3 side.

[0053] Install the insulating plug and the stud bolts 3 into the shoe cover 2, and the installation torque is 50N·m.

[0054] Then remove the insulat...

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Abstract

The invention discloses a method for installing and tightening a T-head stud bolt, comprising: installing one end of the stud bolt with an insulating plug; sleeved a stop washer on the other end of the stud bolt; Put the insulating plug and the studs together into the shoe cover of the T-head and fasten it; remove the insulating plug; fasten the connection between the stud and the shoe cover; install the insulating plug and fasten it. The present invention utilizes the stop washer between the stud bolt and the T-shaped head, and the disassembly operation is performed after the original installation method is used for fastening. Due to the action of the stop washer, the insulating plug is removed while the stud and the T-head remain installed. In this way, the torque wrench is used to separately tighten the stud bolts to achieve the purpose of tightening the stud bolts. While ensuring the accurate centering of the stud and the T-head, the installation torque of the stud and the T-head is guaranteed.

Description

technical field [0001] The invention relates to the technical field of installation of electric locomotive transformers, in particular to a T-shaped head and a method for installing stud bolts thereof. Background technique [0002] The T-shaped head of the stud bolt and the single stop washer has been widely used in the conductive connection of the 25KV circuit of the locomotive. In some types of electric locomotives, there are factors such as high-voltage cable resistance and blocking of sight during the installation of the T-head, which are not conducive to the centering installation of stud bolts, such as Figure 1-Figure 3 As shown in the figure, when there is a problem in the installation and tightening of the stud bolts 3, the conductive contact surface 6 of the high-voltage terminal 5 of the transformer and the T-head 1 of the high-voltage cable will be loose, which will cause discharge or even burn damage under the working voltage of 25KV. . [0003] In order to sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25B27/14
CPCB25B27/14
Inventor 班兴钰刘强石菁杨钊王庆隆
Owner CRRC DALIAN CO LTD
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