An electric railway overhead line support post foundation bolt nut fastening device

Abstract

An electrified railway overhead line support ground bolt nut fastening device relates to the field of railway construction and maintenance technology. The device comprises a main steel pipe, the lower end of which is welded with a hexagonal sleeve to adapt to the ground bolt nut, and the upper end is symmetrically provided with two groups of through holes, each group comprising two horizontally aligned round holes, which are distributed along the axial direction of the main steel pipe and are arranged at 180 degrees in the circumferential direction. A round steel can be inserted into each group of through holes, which can move axially along the through hole and be used as a lever force arm. The hexagonal sleeve and the main steel pipe are integrally designed to wrap the nut. The two groups of staggered through holes and the round steel lever force can flexibly adjust the force angle in a small space, improving the fastening efficiency. The device has the characteristics of lightweight, high strength and low friction, solving the problems of limited operation and low efficiency of traditional tools, ensuring the stability of the overhead line equipment and the safety of train operation.

Description

Technical Field

[0001] This utility model relates to the field of railway construction and maintenance technology, and in particular to a special tool for tightening the anchor bolts and nuts of contact wire support posts during the construction and maintenance of electrified railways. It is suitable for the rapid tightening and anti-loosening of the anchor bolts and nuts of contact wire support posts in confined spaces. Background Technology

[0002] During the construction of the overhead contact system for electrified railways, the tightening of anchor bolts and nuts on the contact system supports is often obstructed by noise barriers, guardrails, and other auxiliary facilities, resulting in limited working space. Traditional socket tools cannot be effectively operated due to insufficient clearance (≥55mm), and ordinary open-end wrenches require multiple adjustments to the clamping angle, leading to low tightening efficiency. In some cases, inadequate tightening can even cause the support to tilt, thereby affecting the stability of the contact system parameters and posing a risk of pantograph-catenary accidents. Summary of the Invention

[0003] The purpose of this invention is to solve the problem of difficult fastening operations in confined spaces in the prior art. This invention provides a special fastening device that can efficiently complete the fastening and anti-loosening operations of anchor bolts and nuts.

[0004] This utility model is achieved through the following technical solution: a fastening device for anchor bolts and nuts of contact wire support columns for electrified railways, comprising a main steel pipe, characterized in that: a sleeve is fixedly welded to the lower end of the main steel pipe, the sleeve being used to fit the anchor bolts and nuts of the contact wire; two sets of through holes are symmetrically provided at the upper end of the main steel pipe, each set of through holes including two horizontally aligned circular holes, the two sets of through holes being spaced apart along the axial direction of the main steel pipe and staggered circumferentially by 180°; a round steel bar can be inserted into each set of through holes, the round steel bar being movable along the axial direction of the through hole, used as a lever arm; the main steel pipe is a hollow titanium alloy pipe with a wall thickness of 6mm, characterized by: combining lightweight and high strength.

[0005] A nylon bushing is provided at the upper end of the main steel pipe to reduce the frictional resistance when the round steel moves.

[0006] The sleeve is a hexagonal sleeve, which is perfectly compatible with the hexagonal shape of the anchor bolt and nut.

[0007] The advantages of this utility model are: the integrated design of the hexagonal sleeve and the main steel pipe allows for direct wrapping of the nut, preventing tool slippage; the two sets of staggered through holes and the round steel levers apply force, allowing for flexible adjustment of the force angle in confined spaces, thus improving tightening efficiency; this device combines lightweight, high strength, and low friction characteristics, solving the problems of limited operation and low efficiency of traditional tools.

[0008] This utility model integrates a hexagonal sleeve, a hollow titanium alloy steel pipe, and a nylon bushing, and is equipped with a round steel bar as a lever arm to tighten anchor bolts and nuts in confined spaces. When the operator tightens the nut, the inner contour of the hexagonal sleeve is completely fitted and wrapped around the nut. The operator inserts a round steel bar into any set of through holes, and the round steel bar moves axially along the through holes to tighten the nut until the tightening requirements are met, ensuring the stability of the overhead contact line equipment and the safety of train operation. Attached Figure Description

[0009] Figure 1 is a schematic diagram of the structure of this utility model.

[0010] In the diagram, 1 is the main steel pipe, 2 is the hexagonal sleeve, 3 is the horizontal through hole, 4 is the nylon bushing, and 5 is the round steel. Detailed Implementation

[0011] As shown in Figure 1, an electrified railway contact network support anchor bolt and nut fastening device includes a main steel pipe 1, a hexagonal sleeve 2 welded to the lower end of the main steel pipe 1, two sets of horizontal through holes 3 opened at the upper end of the main steel pipe 1, a nylon bushing 4 installed in the horizontal through holes 3, and a round steel 5 inserted into the nylon bushing 4.

[0012] The main steel pipe 1 has dimensions of 500 mm x 60 mm. The inner diameter of the hexagonal sleeve 2 at the lower end of the main steel pipe 1 is 60 mm. The diameter of the horizontal through hole 3 at the upper end of the main steel pipe 1 is 30 mm. A nylon bushing 4 with a diameter of 30 mm is installed in the horizontal through hole 3. A round steel bar 5 with dimensions of 400 mm x 20 mm is inserted into the nylon bushing 4.

[0013] Completely wrap the anchor bolt and nut of the support column with the hexagonal sleeve 2; insert the round steel 5 into the nylon bushing 4 of any set of through holes, move the round steel 5 along the axial direction of the through hole, and apply force alternately until the nut is tightened in place; remove the anchor bolt and nut fastening device of the support column in the reverse order.

[0014] The main steel pipe 1 is made of titanium alloy to reduce weight, making it easy to carry while maintaining strength.

[0015] The nylon bushing 4 is used to reduce frictional resistance when the round steel moves.

[0016] The above embodiments are preferred embodiments of the present utility model, but the use of the present utility model is not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made that deviate from the spirit and principle of the present utility model shall be equivalent substitutions and shall be included within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing the utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

Claims

1. A fastening device for anchor bolts and nuts of overhead contact line supports for electrified railways, comprising a main steel pipe, characterized in that: A sleeve is fixedly welded to the lower end of the main steel pipe. The sleeve is used to fit the anchor bolts and nuts of the contact network. Two sets of through holes are symmetrically provided at the upper end of the main steel pipe. Each set of through holes includes two horizontally aligned round holes. The two sets of through holes are distributed at intervals along the axial direction of the main steel pipe and are staggered 180° circumferentially. A round steel bar can be inserted into each set of through holes. The round steel bar can move along the axial direction of the through hole and is used as a lever arm.

2. The fastening device for anchor bolts and nuts of an electrified railway contact network support as described in claim 1, characterized in that: The main steel pipe is a hollow titanium alloy pipe with a wall thickness of 6mm.

3. The fastening device for anchor bolts and nuts of electrified railway contact wire support as described in claim 1, characterized in that: A nylon bushing is provided at the upper end of the main steel pipe to reduce the frictional resistance when the round steel moves.

4. The fastening device for anchor bolts and nuts of electrified railway contact wire support as described in claim 1, characterized in that: The sleeve is a hexagonal sleeve, and the inner contour of the sleeve matches the shape of the anchor bolt and nut of the contact wire support.

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