Improved bell jar insulator

Abstract

An improved bell jar insulator comprises an upper gold piece, an insulator and a lower gold piece which are fixedly connected in sequence, the insulator comprises an insulator main body and a first bell jar which is integrally formed with the insulator main body, and the insulator is made of epoxy resin; a protective outer cover is arranged on the upper gold piece at the upper end of the insulator, the protective outer cover is detachably connected with the upper gold piece, the protective outer cover is made of an epoxy glass fiber material, and the diameter of the outer cover bottom of the protective outer cover is larger than that of the first bell jar bottom of the first bell jar. The utility model has the advantages that the use cost is low, the insulator cannot burst, and the mechanical property of the insulator can be obviously improved.

Description

Technical Field

[0001] The utility model relates to an insulating element used in subway tunnels or areas with particularly serious pollution, in particular to an improved bell insulator. Background Art

[0002] Bell insulators, also known as rigid suspension insulators, are currently the most widely used insulating components in urban light rail and subway systems. Existing bell insulators consist of an upper metal attachment, a lower metal attachment, and a porcelain insulator body. The porcelain insulator body is a solid cylinder at the top, with a hollow recess in the middle of the lower portion and a bell-shaped shed in the center. The upper metal attachment's adhesive surface mates with the solid cylinder on the upper end of the porcelain insulator body, forming a cap shape. The lower metal attachment's adhesive surface mates with the hollow recess in the middle of the lower end face of the porcelain insulator body. Rigid suspension insulators, such as those disclosed in Chinese patent document CN104078169A, exemplify this type of product. This type of product has the following problems: first, once the umbrella of the porcelain insulator is contaminated, the entire insulator needs to be replaced, resulting in high usage costs; second, the insulator used between the upper and lower metal accessories of this type of product is a porcelain insulator. Due to the different expansion coefficients between the upper and lower metal accessories and the porcelain insulator, it is easy for the porcelain insulator to burst when the temperature changes greatly (summer or winter); third, the porcelain insulator is bonded to the upper and lower metal accessories with cement adhesive, and its mechanical properties will significantly deteriorate over time. Utility Model Content

[0003] In order to make up for the above deficiencies, the utility model provides an improved bell insulator which has low use cost and will not burst.

[0004] Another purpose of the present invention is to significantly improve the mechanical properties of the insulator.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An improved bell insulator comprises an upper metal part, an insulator and a lower metal part fixedly connected in sequence. The insulator comprises an insulator body and a first bell formed in one piece with the insulator body. The insulator is made of epoxy resin. A protective outer cover is provided on the upper metal part at the upper end of the insulator. The protective outer cover is detachably connected to the upper metal part. The protective outer cover is made of epoxy glass fiber material. The outer cover bottom diameter of the protective outer cover is larger than the first bell cover bottom diameter of the first bell.

[0007] As an improvement to the present invention, the present invention further comprises a second bell jar, which is located between the upper end of the insulator body and the protective outer cover.

[0008] As an improvement to the present invention, the second bell jar is made of epoxy resin or epoxy glass fiber material.

[0009] As an improvement to the present invention, the diameter of the second bell jar bottom of the second bell jar is greater than or equal to the diameter of the first bell jar bottom, and smaller than the diameter of the outer cover bottom.

[0010] As an improvement to the present invention, a first metal insert is embedded in the upper end of the insulator body, the first metal insert is coaxially arranged with the insulator body, an internal thread is provided on the inner wall of the first metal insert, an external thread is provided on the outer wall of the upper metal piece, and the upper metal piece is threadedly connected to the first metal insert.

[0011] As an improvement to the present invention, a second metal insert is embedded in the lower end of the insulator body, the second metal insert is coaxially arranged with the insulator body, an internal thread is provided on the inner wall of the second metal insert, an external thread is provided on the outer wall of the lower metal part, and the lower metal part is threadedly connected to the second metal insert.

[0012] As an improvement to the present invention, a connecting wire clamp is provided between the lower end of the insulator body and the lower metal part.

[0013] As an improvement to the present invention, the connecting wire clamp includes a connecting wire clamp main body, a first return hook body for holding the wire is provided at one end of the connecting wire clamp main body, and a first hook groove is formed between the first return hook body and the connecting wire clamp main body; a second return hook body for holding the wire is provided at the other end of the connecting wire clamp main body, and a second hook groove is formed between the second return hook body and the connecting wire clamp main body.

[0014] As an improvement to the present invention, a plurality of first shock-absorbing pads are provided on the bottom surfaces of the connecting wire clamp body and the first return hook body corresponding to the first hook groove; and a plurality of second shock-absorbing pads are provided on the bottom surfaces of the connecting wire clamp body and the second return hook body corresponding to the second hook groove.

[0015] As an improvement to the present invention, the first shock-absorbing pad and the second shock-absorbing pad are made of nylon material.

[0016] The utility model has the following beneficial effects:

[0017] The utility model adopts a structure in which a protective outer cover is provided on the upper metal piece at the upper end of the insulator, the protective outer cover is detachably connected to the upper metal piece, the protective outer cover is made of epoxy glass fiber material, and the outer cover bottom diameter of the protective outer cover is larger than the first bell cover bottom diameter of the first bell cover. When the umbrella surface of the porcelain insulator is contaminated, only the protective outer cover needs to be replaced, which has the advantage of low cost. Secondly, the insulator used between the upper metal piece and the lower metal piece of the insulator is an epoxy resin insulator. Since the difference in expansion coefficient between the epoxy resin insulator and the upper metal piece and the lower metal piece is small, it is not easy to cause the porcelain insulator to burst when the temperature changes greatly (summer or winter). crack, thereby extending the service life of the insulator; thirdly, a first metal insert is embedded in the upper end of the insulator body, the first metal insert is coaxially arranged with the insulator body, an internal thread is provided on the inner wall of the first metal insert, an external thread is provided on the outer wall of the upper metal piece, and the upper metal piece is threadedly connected to the first metal insert; and a second metal insert is embedded in the lower end of the insulator body, the second metal insert is coaxially arranged with the insulator body, an internal thread is provided on the inner wall of the second metal insert, an external thread is provided on the outer wall of the lower metal piece, and the lower metal piece is threadedly connected to the second metal insert, which can significantly improve the mechanical properties of the insulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic cross-sectional view of an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Reference Figure 1 , Figure 1Disclosed is an improved bell insulator, comprising an upper metal component 1, an insulator 2 and a lower metal component 3 fixedly connected in sequence, wherein the insulator 2 comprises an insulator body 21 and a first bell 22 integrally molded with the insulator body 21, and the insulator 2 is made of epoxy resin, so that the insulator 2 has good insulation performance and mechanical strength; a protective outer cover 4 is provided on the upper metal component 1 at the upper end of the insulator 2, and the protective outer cover 4 is detachably connected to the upper metal component 1. In this embodiment, a nut 11 is provided on the upper metal component 1, and the protective outer cover 4 is pressed against the end face of the insulator 2 by the nut 11 to achieve detachable connection of the protective outer cover 4; the protective outer cover 4 is made of epoxy glass fiber material, and the outer cover bottom diameter H1 of the protective outer cover 4 is larger than the first bell cover bottom diameter H2 of the first bell 22.

[0021] Preferably, the present invention further comprises a second bell jar 23 , which is located between the upper end of the insulator body 21 and the protective outer cover 4 ; the second bell jar 23 is made of epoxy resin or epoxy glass fiber material.

[0022] Preferably, the second bell jar bottom diameter H3 of the second bell jar 23 is greater than or equal to the first bell jar bottom diameter H2, and smaller than the outer cover bottom diameter H1; in this embodiment, a gasket 12 is provided on the protective outer cover 4 and the upper metal part 1 of the second bell jar 23 to play a buffering role.

[0023] Preferably, a first metal insert 211 is embedded in the upper end of the insulator body 21, and the first metal insert 211 is coaxially arranged with the insulator body 21. An internal thread is provided on the inner wall of the first metal insert 211, and an external thread is provided on the outer wall of the upper metal component 1. The upper metal component 1 is threadedly connected to the first metal insert 211.

[0024] Preferably, a second metal insert 212 is embedded in the lower end of the insulator body 21, and the second metal insert 212 is coaxially arranged with the insulator body 21. An internal thread is provided on the inner wall of the second metal insert 212, and an external thread is provided on the outer wall of the lower metal part 3. The lower metal part 3 is threadedly connected to the second metal insert 212.

[0025] Preferably, a connecting wire clamp 5 is provided between the lower end of the insulator body 21 and the lower metal component 3 .

[0026] Preferably, the connecting wire clamp 5 includes a connecting wire clamp main body 51, and a first return hook body 52 for holding the wire (clamping the connecting cable) is provided at one end of the connecting wire clamp main body 51, and the first return hook body 52 is connected to the connecting wire clamp main body 51 through a first screw 523, and a first hook groove 521 is formed between the first return hook body 52 and the connecting wire clamp main body 51; a second return hook body 53 for holding the wire (clamping the connecting cable) is provided at the other end of the connecting wire clamp main body 51, and the second return hook body 53 is connected to the connecting wire clamp main body 51 through a second screw 533, and a second hook groove 531 is formed between the second return hook body 53 and the connecting wire clamp main body 51.

[0027] Preferably, a plurality of first shock-absorbing pads 522 are provided on the bottom surfaces of the connecting wire clamp body 51 and the first return hook body 52 corresponding to the first hook groove 521; and a plurality of second shock-absorbing pads 532 are provided on the bottom surfaces of the connecting wire clamp body 51 and the second return hook body 53 corresponding to the second hook groove 531.

[0028] Preferably, the first shock-absorbing pad 522 and the second shock-absorbing pad 532 are made of nylon material.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An improved bell insulator, comprising an upper metal part (1), an insulator (2) and a lower metal part (3) fixedly connected in sequence, characterized in that: The insulator (2) comprises an insulator body (21) and a first bell jar (22) formed in one piece with the insulator body (21), and the insulator (2) is made of epoxy resin; a protective outer cover (4) is provided on the upper metal part (1) at the upper end of the insulator (2), and the protective outer cover (4) is detachably connected to the upper metal part (1), and the protective outer cover (4) is made of epoxy glass fiber material, and the outer cover bottom diameter (H1) of the protective outer cover (4) is larger than the first bell jar bottom diameter (H2) of the first bell jar (22).

2. The improved bell insulator according to claim 1, characterized in that: It also includes a second bell jar (23), which is located between the upper end of the insulator body (21) and the protective outer cover (4).

3. The improved bell insulator according to claim 2, characterized in that: The second bell jar (23) is made of epoxy resin or epoxy glass fiber material.

4. The improved bell insulator according to claim 2, characterized in that: The second bell jar bottom diameter (H3) of the second bell jar (23) is greater than or equal to the first bell jar bottom diameter (H2) and smaller than the outer cover bottom diameter (H1).

5. The improved bell insulator according to any one of claims 1 to 4, characterized in that: A first metal insert (211) is embedded in the upper end of the insulator body (21), the first metal insert (211) is coaxially arranged with the insulator body (21), an internal thread is provided on the inner wall of the first metal insert (211), and an external thread is provided on the outer wall of the upper metal part (1), and the upper metal part (1) is threadedly connected to the first metal insert (211).

6. The improved bell insulator according to any one of claims 1 to 4, characterized in that: A second metal insert (212) is embedded in the lower end of the insulator body (21), the second metal insert (212) is coaxially arranged with the insulator body (21), an internal thread is provided on the inner wall of the second metal insert (212), and an external thread is provided on the outer wall of the lower metal part (3), and the lower metal part (3) is threadedly connected to the second metal insert (212).

7. The improved bell insulator according to claim 6, characterized in that: A connecting wire clamp (5) is provided between the lower end of the insulator body (21) and the lower metal part (3).

8. The improved bell insulator according to claim 7, characterized in that: The connecting wire clamp (5) comprises a connecting wire clamp body (51), a first return hook body (52) for holding a wire is provided at one end of the connecting wire clamp body (51), and a first hook groove (521) is formed between the first return hook body (52) and the connecting wire clamp body (51); and a second return hook body (53) for holding a wire is provided at the other end of the connecting wire clamp body (51), and a second hook groove (531) is formed between the second return hook body (53) and the connecting wire clamp body (51).

9. The improved bell insulator according to claim 8, characterized in that: A plurality of first shock-absorbing pads (522) are provided on the bottom surfaces of the connecting wire clamp body (51) and the first return hook body (52) corresponding to the first hook groove (521); and a plurality of second shock-absorbing pads (532) are provided on the bottom surfaces of the connecting wire clamp body (51) and the second return hook body (53) corresponding to the second hook groove (531).

10. The improved bell insulator according to claim 9, characterized in that: The first anti-vibration pad (522) and the second anti-vibration pad (532) are made of nylon material.

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