Pantograph supporting insulator with built-in air pipe

Abstract

The utility model relates to a pantograph supporting insulator with a built-in air pipe, which comprises an insulator body, the air pipe is arranged in the insulator body, both the insulator body and the air pipe are made of epoxy resin materials, and the insulator body is integrally formed on the air pipe. According to the invention, the air pipe is formed through mold injection molding, then the insulator body is integrally formed on the air pipe through injection molding, and the air pipe and the insulator are made of epoxy resin materials, so that the air pipe and the insulator are connected more tightly, and the situation of partial discharge is avoided as much as possible.

Description

Technical Field

[0001] This application relates to the field of pantographs, and more particularly to a pantograph support insulator with an internal air tube. Background Technology

[0002] A pantograph is an electrical device used by electric locomotives to obtain electrical energy from the overhead contact line. It is installed on the roof of the locomotive or train. Raising and lowering the pantograph is accomplished by compressed air driving the extension and retraction of the lowering spring. Insulators serve to support the pantograph and transmit compressed air.

[0003] In related technologies, an insulator includes an insulator body made of epoxy resin. Inside the insulator body is a hose for transmitting compressed air, which is made of PA material or rubber. The connection between the hose and the inner wall of the insulator body has relatively low strength, resulting in a gap that can easily lead to partial discharge. Utility Model Content

[0004] In order to solve the technical problem that the low bonding strength between the air tube and the inner wall of the insulator body in the prior art leads to the easy generation of partial discharge, this application provides a pantograph support insulator with built-in air tube.

[0005] This application provides a pantograph support insulator with a built-in air tube, which adopts the following technical solution:

[0006] A pantograph support insulator with an internal air tube includes an insulator body, wherein an air tube is provided inside the insulator body, and both the insulator body and the air tube are made of epoxy resin material, and the insulator body is integrally formed on the air tube.

[0007] By adopting the above technical solution, the air tube is first formed by injection molding, and then the insulator body is integrally molded onto the air tube by injection molding. Both the air tube and the insulator body are made of epoxy resin material, which makes the connection between the air tube and the insulator body tighter and minimizes the occurrence of partial discharge.

[0008] Optionally, the insulator body includes a plurality of horizontally arranged sheds, the plurality of sheds being arranged along the height direction of the insulator body, the sheds including a first shed and a second shed, at least one second shed being arranged between two adjacent first sheds, and the radial dimension of the first shed being greater than the radial dimension of the second shed.

[0009] By adopting the above technical solution, the arrangement of the first and second umbrella skirts increases the creepage distance. When it rains, rainwater will flow from the upper first umbrella skirt to the lower first umbrella skirt, and finally fall from the bottom first umbrella skirt. That is, the first umbrella skirt effectively protects the second umbrella skirt from being directly affected by rainwater during operation, separating the flow direction of rainwater from the electrode discharge path.

[0010] Optionally, the umbrella skirt is covered with a silicone rubber cover.

[0011] By adopting the above technical solution, the silicone rubber jacket protects the epoxy resin skirt and improves the pollution resistance of the insulator body.

[0012] Optionally, the outer periphery of the umbrella skirt is elliptical.

[0013] By adopting the above technical solutions, the wind resistance during vehicle operation can be reduced.

[0014] Optionally, the air tube extends in a wavy shape along the height direction of the insulator body.

[0015] By adopting the above technical solutions, the electrical clearance and creepage distance are improved, thereby enhancing the withstand voltage capability of the insulators.

[0016] Optionally, the trachea includes multiple segments, each segment having a connecting structure, and adjacent segments are detachably connected via the connecting structure.

[0017] By adopting the above technical solution, since the air pipe is made of epoxy resin material and extends in a wavy shape, the air pipe has the problem of being difficult to demold during the processing. The air pipe is divided into multiple detachable pipe sections to facilitate processing and demolding.

[0018] Optionally, the tube segment includes a straight section and connecting sections at both ends of the straight section. The connecting sections are used to connect with the connecting sections of adjacent tube segments, and the two connected connecting sections form a curved section of the trachea.

[0019] By adopting the above technical solution, the air tube is divided into multiple tube segments, which are mainly straight sections, making processing and demolding easier.

[0020] Optionally, the connection structure includes a male connector and a female connector respectively disposed at the ends of the two connecting segments, wherein the male connector is used to insert and mate with the female connector of the adjacent pipe segment.

[0021] By adopting the above technical solution, adjacent pipe sections can be plugged together, which facilitates the connection and assembly of pipe sections and makes the operation quick.

[0022] Optionally, the outer diameter of the male connector is larger than the inner diameter of the female connector.

[0023] By adopting the above technical solution, the male and female connectors are interference-fitted, eliminating the need for seals and fasteners while ensuring a stable and tight connection between adjacent pipe sections, resulting in a simple structure.

[0024] Optionally, the outer wall of the connecting section is coated with an epoxy resin layer.

[0025] By adopting the above technical solution, an epoxy resin layer is first coated on the outer wall of the connecting section, and then an insulating body is formed by injection molding on the outside of the air pipe, so that the connection between adjacent pipe sections is tighter and the sealing performance and connection stability are improved.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. Both the air tube and the insulator body are made of epoxy resin material, which makes the connection between the air tube and the insulator tighter and minimizes the occurrence of partial discharge.

[0028] 2. The silicone rubber jacket protects the epoxy resin skirt and improves the pollution resistance of the insulator body;

[0029] 3. Divide the air pipe into multiple detachable segments for easy processing and demolding. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the pantograph support insulator with built-in air tube in Embodiment 1 of this application.

[0031] Figure 2 It is along Figure 1 Sectional view of AA.

[0032] Figure 3 This is a partial view of the connecting segment in Embodiment 1 of this application.

[0033] Figure 4 This is a partial view of the connecting segment in Embodiment 2 of this application.

[0034] Explanation of reference numerals in the attached drawings: 1. Insulator body; 2. Air pipe; 21. Pipe section; 211. Straight section; 212. Connecting section; 3. Sheath; 31. First sheath; 32. Second sheath; 4. Silicone rubber jacket; 5. Connection structure; 51. Male connector; 52. Female connector; 6. Epoxy resin layer; 7. Insert; 71. Through hole. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0036] Example 1:

[0037] Embodiment 1 of this application discloses a pantograph support insulator with an internal air tube. (See also...) Figure 1 and Figure 2 The pantograph support insulator with built-in air tube includes an insulator body 1, and an air tube 2 is provided inside the insulator body 1. Both the insulator body 1 and the air tube 2 are made of epoxy resin material. The insulator body 1 is integrally molded onto the air tube 2 by injection molding process.

[0038] Reference Figure 2 and Figure 3 The air pipe 2 extends in a wavy shape along the height direction of the insulator body 1. The air pipe 2 includes multiple pipe segments 21, each pipe segment 21 including a straight segment 211 and a connecting segment 212 integrally formed at both ends of the straight segment 211. Adjacent connecting segments 212 of adjacent pipe segments 21 are connected to form a curved section of the air pipe 2.

[0039] Reference Figure 2 and Figure 3 The connecting section 212 is provided with a connecting structure 5, and adjacent pipe sections 21 are detachably connected through the connecting structure 5. The connecting structure 5 includes a male connector 51 and a female connector 52, which are integrally formed on the ends of two connecting sections 212 of a pipe section 21. The outer diameter of the male connector 51 is slightly larger than the inner diameter of the female connector 52. Adjacent pipe sections 21 are connected and fixed by interference fit between the male connector 51 and the female connector 52.

[0040] Reference Figure 2 Inserts 7 are inserted into both opposite ends of the two pipe sections 21 located at both ends. The inserts 7 are fixedly installed on the insulator body 1, and through holes 71 are opened on the inserts 7 so that the outside of the insulator body 1 is connected to the air pipe 2.

[0041] Reference Figure 1 and Figure 2 The insulator body 1 includes multiple horizontally arranged sheds 3, which are distributed along the height of the insulator body 1. The outer circumference of the sheds 3 is elliptical to reduce wind resistance. A silicone rubber jacket 4 is fitted over the sheds 3 to protect them.

[0042] Reference Figure 1 and Figure 2 The insulator skirt 3 includes a first skirt 31 and a second skirt 32. The radial dimension of the first skirt 31 is larger than that of the second skirt 32, meaning that the projection of the first skirt 31 onto the radial plane of the insulator body 1 completely covers the projection of the second skirt 32 onto the radial plane of the insulator body 1. Two second skirts 32 are arranged between two adjacent first skirts 31. The skirts 3 located at the top and bottom of the insulator body 1 are the first skirts 31.

[0043] Reference Figure 1 The radial dimension of the insulator body 1 gradually increases from top to bottom along the height direction of the insulator body 1, making the insulator body 1 as a whole pagoda shape, which plays a role in resisting bending.

[0044] The processing principle of a pantograph support insulator with built-in air tube in Embodiment 1 of this application is as follows: First, multiple tube segments 21 are formed by injection molding through a mold. The multiple tube segments 21 are then connected in sequence to form a complete wavy air tube 2. Then, the insulator body 1 is integrally formed on the air tube 2 by injection molding.

[0045] This application addresses the technical problem in the prior art where the low bonding strength between the air tube and the inner wall of the insulator body leads to a high likelihood of partial discharge. It provides a pantograph support insulator with an internal air tube, wherein both the insulator body 1 and the air tube 2 are made of epoxy resin. First, the air tube 2 is formed by injection molding, and then the insulator body 1 is integrally molded onto the air tube 2. This results in a tighter connection between the air tube 2 and the insulator body 1, effectively reducing the possibility of partial discharge.

[0046] Example 2:

[0047] Reference Figure 4 Unlike Embodiment 1, in this embodiment, the outer wall of the connecting segment 212 is coated with an epoxy resin layer 6. After the adjacent connecting segments 212 are plugged together, an epoxy resin layer is coated on the outer periphery of the connecting segment 212, and then the insulator body 1 is injection molded on the outside of the air pipe 2.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pantograph support insulator with an internal air tube, characterized in that: It includes an insulator body (1), and an air tube (2) is provided inside the insulator body (1). Both the insulator body (1) and the air tube (2) are made of epoxy resin material, and the insulator body (1) is integrally formed on the air tube (2).

2. The pantograph support insulator with built-in air tube according to claim 1, characterized in that: The insulator body (1) includes a plurality of horizontally arranged skirts (3), the plurality of skirts (3) are arranged along the height direction of the insulator body (1), the skirts (3) include a first skirt (31) and a second skirt (32), at least one second skirt (32) is arranged between two adjacent first skirts (31), and the radial dimension of the first skirt (31) is greater than the radial dimension of the second skirt (32).

3. The pantograph support insulator with built-in air tube according to claim 2, characterized in that: The umbrella skirt (3) is covered with a silicone rubber outer cover (4).

4. The pantograph support insulator with built-in air tube according to claim 2, characterized in that: The outer periphery of the umbrella skirt (3) is elliptical.

5. The pantograph support insulator with built-in air tube according to claim 1, characterized in that: The air tube (2) extends in a wavy shape along the height direction of the insulator body (1).

6. The pantograph support insulator with built-in air tube according to claim 5, characterized in that: The trachea (2) includes multiple tube segments (21), and each tube segment (21) is provided with a connecting structure (5). Adjacent tube segments (21) are detachably connected through the connecting structure (5).

7. The pantograph support insulator with built-in air tube according to claim 6, characterized in that: The pipe section (21) includes a straight section (211) and connecting sections (212) located at both ends of the straight section (211). The connecting sections (212) are used to connect with the connecting sections (212) of the adjacent pipe section (21). The two connected connecting sections (212) form a curved section of the trachea (2).

8. The pantograph support insulator with built-in air tube according to claim 6, characterized in that: The connection structure (5) includes a male connector (51) and a female connector (52) respectively disposed on the ends of the two connecting sections (212). The male connector (51) is used to plug into and cooperate with the female connector (52) of the adjacent pipe section (21).

9. The pantograph support insulator with built-in air tube according to claim 8, characterized in that: The outer diameter of the male connector (51) is larger than the inner diameter of the female connector (52).

10. The pantograph support insulator with built-in air tube according to claim 7, characterized in that: The outer wall of the connecting section (212) is coated with an epoxy resin layer (6).

Images