Cross arm insulator

Abstract

A cross arm porcelain insulator comprises an upper gold piece, a lower gold piece and a porcelain piece, the upper gold piece comprises a first cylindrical body, one end of the first cylindrical body is provided with a first blind hole, and the other end of the first cylindrical body extends outwards to form a transverse platform; the two ends of the transverse platform sink to form a first concave area and a second concave area respectively, a first runway type through hole and a second runway type through hole are formed in the first concave area and the second concave area respectively, the number of the umbrella skirt of the porcelain piece is one, and the umbrella skirt comprises an umbrella skirt body and at least two umbrella edges. Compared with the prior art, the insulator has the advantages that the upper gold piece and other pieces are connected in a cross arm mode through hole sites, the structure is simpler, the design is more ingenious, the longitudinal load stress of the whole insulator is more balanced, and dust and stains are not easy to accumulate on the porcelain piece umbrella skirts.

Description

Technical Field

[0001] The utility model relates to the field of insulators, in particular to a cross-arm insulator. Background Art

[0002] A cross-arm insulator is an insulator used in overhead lines. It can not only support and fix the conductors, insulate the conductors from the ground, but also act as a cross-arm to support the conductors and fix them on the utility poles. Cross-arm insulators are widely used in electric power overhead lines, especially in overhead lines adopted in urban areas to reduce the line corridor. It bears the weight and tension of the conductors, as well as the stability under adverse weather conditions.

[0003] The cross-arm insulator includes a porcelain cross-arm insulator and a composite cross-arm insulator. The porcelain cross-arm insulator includes an upper metal fitting, a lower metal fitting, and a porcelain part cemented integrally with the upper metal fitting and the lower metal fitting.

[0004] However, this porcelain cross-arm insulator in the above-mentioned prior art has the following defects in the using process: First, the connection method between the upper metal fitting and other parts is bolt connection, which easily causes unbalanced longitudinal load stress, thus affecting the service life of the insulator; Second, the porcelain part umbrella skirt usually has multiple ones, and the umbrella ribs are arranged on the outside, which easily accumulates dust and stains, increasing the pollution risk. Summary of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a cross-arm insulator with more balanced longitudinal load stress and less likely to accumulate dust and stains on the porcelain part umbrella skirt.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: A cross-arm insulator is provided, which includes an upper metal fitting, a lower metal fitting, and a porcelain part cemented integrally with the upper metal fitting and the lower metal fitting by cement. The upper metal fitting includes a first cylindrical body. One end of the first cylindrical body is provided with a first blind hole for mating connection with the porcelain part. The other end of the first cylindrical body extends outward to form a transverse platform. First concave areas and second concave areas are respectively sunken at both ends of the transverse platform. A first runway-shaped through hole and a second runway-shaped through hole are respectively arranged in the first concave area and the second concave area. The umbrella skirt of the porcelain part is one, and the umbrella skirt includes an umbrella skirt body and at least two umbrella ribs extending downward from the umbrella skirt body at a predetermined distance.

[0007] As an improvement of the utility model, a first felt pad is arranged between the upper metal fitting and the top of the porcelain part.

[0008] As an improvement of the utility model, a second felt pad is arranged between the porcelain part and the top of the lower metal fitting.

[0009] As an improvement of the present utility model, the upper metal part and the periphery of the porcelain part are glued by a cement adhesive.

[0010] As an improvement of the present utility model, the periphery of the porcelain part and the lower metal part are glued by a cement adhesive.

[0011] As an improvement of the present utility model, a metal flat washer or spring washer is provided in the first recessed area.

[0012] As an improvement of the present utility model, a metal flat washer or spring washer is provided in the second recessed area.

[0013] The present utility model has the following beneficial effects: Since the present utility model includes an upper metal part, a lower metal part, and a porcelain part cement-bonded to the upper metal part and the lower metal part, the upper metal part includes a first cylindrical body, one end of the first cylindrical body is provided with a first blind hole for mating connection with the porcelain part, the other end of the first cylindrical body extends outward to form a transverse platform, and the first recessed area and the second recessed area are respectively formed by sinking at both ends of the transverse platform. The first recessed area and the second recessed area are respectively provided with a first runway-shaped through hole and a second runway-shaped through hole. In this way, the connection method between the upper metal part and other parts is a cross-arm type and is connected through hole positions, the structure is simpler, the design is more ingenious, and the longitudinal load of the overall insulator is more balanced; in addition, in the present utility model, the umbrella skirt of the porcelain part is one, and the umbrella skirt includes an umbrella skirt body and at least two umbrella ribs extending downward from the umbrella skirt body at a predetermined distance. The number of umbrella skirts of the porcelain part is less, and the umbrella ribs face downward, so that it is less likely for the umbrella skirts of the porcelain part to accumulate dust and stains, reducing the risk of contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view schematic diagram of an embodiment of the present utility model.

[0015] Figure 2 is Figure 1 a partial cross-sectional schematic diagram.

[0016] Figure 3 is Figure 1 a top view schematic diagram. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Referring toFigures 1 to 3 , Figures 1 to 3 An embodiment of a cross-arm insulator is disclosed. A cross-arm insulator includes an upper metal fitting 1, a lower metal fitting 2, and a porcelain part 3 cement-bonded integrally with the upper metal fitting 1 and the lower metal fitting 2. Specifically, after the upper metal fitting 1, the lower metal fitting 2, and the porcelain part 3 are cement-bonded integrally; further, in this embodiment, the upper metal fitting 1 includes a first cylindrical body 11. One end of the first cylindrical body 11 is provided with a first blind hole 10 for mating connection with the porcelain part 3. The other end of the first cylindrical body 11 extends outward to form a transverse platform 12. The structure of the transverse platform 12 can be similar to a rectangular structure. At both ends of the transverse platform 12, a first depression area 121 and a second depression area 122 are respectively formed by sinking. A first runway-shaped through hole 1211 and a second runway-shaped through hole 1221 are respectively provided in the first depression area 121 and the second depression area 122. Specifically, in this embodiment, when the upper metal fitting 1 is connected to other parts, it can be connected through the cross-arm and the hole positions of the first runway-shaped through hole 1211 and the second runway-shaped through hole 1221. In this way, compared with the bolted connection method in the prior art, the structure of the present utility model is simpler, the design is more ingenious, and the connection is more convenient. In this embodiment, the umbrella skirt 31 of the porcelain part 3 is one. The umbrella skirt 31 includes an umbrella skirt body 311 and at least two umbrella ribs 312 extending downward from the umbrella skirt body 311 at a predetermined distance. In this embodiment, there are 4 umbrella ribs 312. Compared with the prior art, the number of umbrella skirts of the porcelain part is less, and the umbrella ribs 312 face downward, so that it is less likely for the umbrella skirt of the porcelain part to accumulate dust and stains, reducing the pollution risk.

[0019] In the present utility model, preferably, a first felt pad 51 is provided between the upper metal fitting 1 and the top of the porcelain part 3. The first felt pad 51 is for buffering during expansion, so as not to cause the product to become detached due to the loosening of the cement binder caused by expansion.

[0020] In the present utility model, preferably, a second felt pad 52 is provided between the porcelain part 3 and the top of the lower metal fitting 2. The second felt pad 52 is for buffering during expansion, so as not to cause the product to become detached due to the loosening of the cement binder caused by expansion.

[0021] In the present utility model, preferably, the periphery between the upper metal part 1 and the ceramic part 3 is glued by a cement adhesive 6. Similarly, the periphery between the ceramic part 3 and the lower metal part 2 is also glued by the cement adhesive 6. In the present utility model, the cement adhesive 6 not only plays a role in bonding the upper metal part 1 and the ceramic part 3 together, but also, while fixing the insulator, can fill the gap between the insulator and the support, effectively reducing the air gap, thereby improving the insulation performance of the insulator. In addition, the cement adhesive has excellent weather resistance and durability and can resist harsh outdoor environments.

[0022] In the present utility model, preferably, a metal flat washer or spring washer is provided in the first recessed area 121. Similarly, a metal flat washer or spring washer is provided in the second recessed area 122 to facilitate the connection between the upper metal part 1 and other parts.

[0023] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A cross-arm insulator, characterized in that: It includes an upper metal part (1), a lower metal part (2), and a porcelain part (3) cement-bonded integrally with the upper metal part (1) and the lower metal part (2). The upper metal part (1) includes a first cylindrical body (11). One end of the first cylindrical body (11) is provided with a first blind hole (10) for mating connection with the porcelain part (3). The other end of the first cylindrical body (11) extends outward to form a transverse platform (12). First concave areas (121) and second concave areas (122) are respectively sunken at both ends of the transverse platform (12). A first runway-shaped through hole (1211) and a second runway-shaped through hole (1221) are respectively provided in the first concave area (121) and the second concave area (122). The umbrella skirt (31) of the porcelain part (3) is one, and the umbrella skirt (31) includes an umbrella skirt body (311) and at least two umbrella ribs (312) extending downward from the umbrella skirt body (311) at a predetermined distance.

2. The cross-arm insulator according to claim 1, characterized in that: A first felt pad (51) is provided between the upper metal part (1) and the top of the porcelain part (3).

3. The cross-arm insulator according to claim 1, characterized in that: A second felt pad (52) is provided between the porcelain part (3) and the top of the lower metal part (2).

4. The cross-arm insulator according to claim 1, wherein: The periphery between the upper metal part (1) and the porcelain part (3) is glued by a cement adhesive (6).

5. The cross-arm insulator according to claim 1, characterized in that: The periphery between the porcelain part (3) and the lower metal part (2) is glued by a cement adhesive (6).

6. The cross-arm insulator according to claim 1, characterized in that: A metal flat pad or spring pad is provided in the first concave area (121).

7. The cross-arm insulator according to claim 1, characterized in that: A metal flat pad or spring pad is provided in the second concave area (122).

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