CN107618403B

CN107618403B - Integral hanger

Info

Publication number: CN107618403B
Application number: CN201710841462.XA
Authority: CN
Inventors: 何春天; 阳光武; 肖守讷; 杨冰; 朱涛; 秦亚航
Original assignee: Southwest Jiaotong University
Current assignee: Southwest Jiaotong University
Priority date: 2017-09-18
Filing date: 2017-09-18
Publication date: 2023-07-07
Anticipated expiration: 2037-09-18
Also published as: CN107618403A

Abstract

The invention provides an integral hanger, and belongs to the technical field of traction power supply equipment of electrified railways. The clamping and pressing pipe is provided with an axial blind hole in the center of the upper part, a U-shaped split is arranged at the lower part, and through holes are formed at the lower parts of two fork arms; one end of the hanging string is connected with the top of the pressing pipe piston through punching, the outer diameter of the lower part of the pressing pipe piston is matched with the inner wall of the axial blind hole on the upper part of the pressing pipe, a hanging string clamp is arranged in a U-shaped split on the lower part of the pressing pipe, a bolt penetrates through a through hole on the lower part of the two fork arms and the hanging string clamp to be fixed through nuts, a clamping opening of the hanging string clamp is meshed and fixed with a groove of a contact line, and the pressing pipe piston is fixed through a piston cover on the upper part of the pressing pipe. The cable hanger is mainly used for cable hanging of traction power supply contact networks of electrified railways.

Description

Integral hanger

Technical Field

The invention belongs to the technical field of traction power supply equipment of electrified railways.

Background

The existing overhead line system dropper comprises an integral dropper, a link dropper and a rigid dropper. However, the droppers used on the contact net of the high-speed railway have the conditions of strand breakage, breakage and impact damage, which seriously affect the driving safety of the high-speed train. This is also the most prominent problem affecting the safety of high-speed trains as the train operation speed is further increased. The ultimate cause of this problem has been found to be the instantaneous impact load of the pantograph and catenary. However, a dropper employing an impact load has not been used in a dropper configuration.

Disclosure of Invention

The invention aims to provide an integral hanger which can effectively solve the problems of impact load caused by impact load between arch nets, strand stress concentration and energy dissipation.

The aim of the invention is realized by the following technical scheme: the integral hanger comprises a pipe pressing piston, a pipe clamping and pressing clamp and a string hanging clamp, wherein the pipe clamping and pressing clamp is provided with an axial blind hole in the center of the upper part, a U-shaped split is arranged at the lower part, and through holes are formed at the lower parts of two fork arms; one end of the hanging string is connected with the top of the pressing pipe piston through punching, the outer diameter of the lower part of the pressing pipe piston is matched with the inner wall of the axial blind hole on the upper part of the pressing pipe, a hanging string clamp is arranged in a U-shaped split on the lower part of the pressing pipe, a bolt penetrates through a through hole on the lower part of the two fork arms and the hanging string clamp to be fixed through nuts, a clamping opening of the hanging string clamp is meshed and fixed with a groove of a contact line, and the pressing pipe piston is fixed through a piston cover on the upper part of the pressing pipe.

The outer surface of the lower part of the pipe pressing piston is of a structure with a sealing ring. .

The inner wall of the clamping pipe is of an air cylinder structure.

The outer sides of the through holes at the lower parts of the two fork arms of the clamping pipe are provided with inner hexagonal grooves.

The contact surface of the clamping tube and the hanging string clamp is an abrasion type surface. .

Further, the pipe pressing piston and the hanging string are pressed together by a manual or electric hydraulic pliers through a positive, a negative and a three-way indentation method, the other end of the pipe pressing piston is coupled with the pliers through the sealing ring and the pliers through the internal and external air pressure, and a certain internal and external pressure difference can be kept, so that the hanging force of the hanging string is ensured to be a constant value in a static state.

The clamping tube and the hanging string clamp are connected together through the bolt, wherein the outer side of the through hole at the lower parts of the two fork arms of the clamping tube is provided with an inner hexagonal groove, the groove can prevent relative displacement of the bolt and the nut, and the lower parts of the two fork arms of the clamping tube can also be pulled inwards, so that certain extrusion force is generated between the inner side walls at the lower parts of the two fork arms of the clamping tube and the hanging string clamp, friction force is generated when the hanging string clamp and the clamping tube move relatively, and energy generated by impact is dissipated.

Compared with the prior art, the invention has the advantages and effects that: the shock-resistant integral hanger utilizing friction and air damping is in a structural form of the integral hanger, energy generated in the impact rotation of a wire clamp is consumed by friction between the hanger wire clamp and a clamp pipe, and the vertical impact between the wire clamp, a contact net and the hanger caused by the vertical impact of a pantograph is reduced by utilizing air pressure viscosity between the clamp pipe and a clamp pipe piston. The shock-resistant energy-saving device has the advantages of remarkable shock-resistant effect, rapid energy absorption, compact structure, small volume, small mass, easy installation, replacement and maintenance and the like.

Drawings

FIG. 1 is a left side view of the present invention

FIG. 2 is a partial cross-sectional view of the present invention (pneumatic vibration damping mechanism)

FIG. 3 is a partial cross-sectional view of the present invention (friction damping mechanism)

FIG. 4 is a three-dimensional view of the general structure of the present invention

Detailed Description

As shown in fig. 1, the integrated hanger comprises a pipe pressing piston 2, a pipe clamping and pressing 3 and a hanger wire clamp 5; the hanging string 1 is connected with the pressing pipe piston 2 through extrusion or punching, the outer surface of the lower part of the pressing pipe piston 2 is of a structure with a sealing ring, the outer diameter of the sealing ring is matched with the inner wall of an axial blind hole on the upper part of the pressing pipe 3, a hanging string wire clamp 5 is arranged in a U-shaped split fork on the lower part of the pressing pipe 3, a bolt 6 penetrates through a through hole on the lower part of two fork arms and the hanging string wire clamp 5 to be fixed through a nut 4, a clamping opening of the hanging string wire clamp 5 is meshed and fixed with a groove of a contact wire 7, and the pressing pipe piston 2 is fixed through a piston cover 8 above the pressing pipe 3. The crimp piston 2 is limited in maximum vertical displacement by a welded piston cap 8.

Fig. 2 shows an air pressure vibration damping mechanism, a pipe pressing piston 2 and a hanging string 1 are pressed together by a manual or electric hydraulic clamp by adopting a positive-negative three-way indentation method, so that the pipe pressing piston 2 and the pipe pressing 3 are tightly matched and fixed together, the pipe pressing piston 2 and the pipe pressing 3 are connected together through internal and external pressure differences formed by a sealed cavity, and the outer sides of through holes at the lower parts of two fork arms of the pipe pressing clamp are provided with inner hexagonal grooves. Grooves matching the shape of the nuts are used for installing bolts.

In fig. 3, for the friction vibration damping mechanism, when the clamping tube 3 and the dropper wire clamp 5 are assembled, prestress is applied to two fork arms at the lower end of the clamping tube 3, so that the bolt 6 can be just clamped in the inner hexagonal groove, and the displacement of the bolt relative to the nut 4 is ensured to be unchanged. Therefore, the radial displacement of the clamping tube 3 and the dropper clamp 5 can be limited, and meanwhile, friction force and pretightening force can exist between the clamping tube 3 and the dropper clamp 5.

The structure can effectively utilize the friction consumption between the dropper wire clamp 5 and the clamp pipe 3 as the energy generated in the impact rotation of the wire clamp, and also utilize the air pressure viscosity between the clamp pipe 3 and the pipe pressing piston 2 to reduce the vertical impact between the wire clamp, the contact net and the dropper caused by the vertical impact of the pantograph on the contact net. The shock-resistant energy-saving device has the advantages of remarkable shock-resistant effect, rapid energy absorption, compact structure, small volume, small mass, easy installation, replacement and maintenance and the like.

The described embodiments of the invention should not be construed as limiting the scope of the present application, but any modifications, equivalent substitutions and improvements that can be made by those skilled in the art are intended to be included within the scope of the present invention, which is defined by the appended claims.

Claims

1. The utility model provides an integral dropper, includes presses pipe piston (2), pincers and presses pipe (3) and dropper clamp (5), its characterized in that: the clamping tube (3) is provided with an axial blind hole in the center of the upper part, a U-shaped split is arranged at the lower part, and through holes are arranged at the lower parts of the two fork arms; the pipe pressing piston (2) and the hanging string (1) are in tight fit and fixed through adopting a positive, negative and three-way indentation method, the pipe pressing piston (2) and the hanging string (3) are connected through an inner-outer pressure difference formed by a sealing cavity to form an air pressure vibration damping mechanism, one end of the hanging string (1) is connected with the top of the pipe pressing piston (2) through punching, the outer diameter of the lower part of the pipe pressing piston (2) is matched with the inner wall of an axial blind hole at the upper part of the sealed pipe pressing piston (3), a hanging string clamp (5) is arranged in a U-shaped split fork at the lower part of the pipe pressing piston (3), prestress is applied to two fork arms at the lower end of the pipe pressing piston (3) when the pipe pressing piston (3) and the hanging string clamp (5) are assembled, so that a bolt (6) can be just clamped in an inner hexagonal groove and the displacement of the bolt (6) is ensured not to be deformed into a friction vibration damping mechanism, the radial displacement of the pipe pressing piston (3) and the hanging string clamp (5) can be limited, meanwhile, friction force between the pipe pressing piston (3) and the hanging string clamp (5) can be effectively utilized to reduce the consumption of the friction force between the pipe pressing piston and the hanging string clamp (3) by utilizing the friction clamp and the friction clamp (5) to impact force between the pipe pressing clamp (3) and the contact net and the impact wire clamp (3; the bolts (6) penetrate through holes at the lower parts of the two fork arms and the hanging string clamps (5) to be fixed through nuts (4), clamping openings of the hanging string clamps (5) are meshed and fixed with grooves of the contact lines (7), and the pipe pressing pistons (2) are fixed through piston covers (8) above the clamping pipes (3).

2. An integral hanger according to claim 1, wherein: the outer surface of the lower part of the pipe pressing piston (2) is of a structure with a sealing ring.

3. An integral hanger according to claim 1, wherein: the inner wall of the clamping pipe (3) is of an air cylinder structure.

4. The integrated hanger according to claim 1, wherein the outer side of the through hole at the lower part of the two fork arms of the clamping tube (3) is provided with a hexagon socket.

5. A monoblock dropper as claimed in claim 1, wherein the contact surface of the crimp tube (3) and the dropper clip (5) is a wear surface.