Insulator and cementing method thereof

Abstract

The invention discloses an insulator which comprises an insulator, an umbrella skirt and flanges, the umbrella skirt covers the outer wall of the insulator, the flanges are connected to the two ends of the insulator, each flange comprises a base and a sleeve part extending out of the base, and at least two glue containing grooves are formed between the sleeve part and the insulator. Each glue containing groove is formed by a first groove formed in the inner wall of the sleeve part and / or a second groove formed in the outer wall of the insulator, at least one vertical groove is formed in the inner wall of the sleeve part in the axial direction of the sleeve part, each vertical groove is communicated with at least two glue containing grooves, and the at least two glue containing grooves are axially formed around the insulator and are arranged in parallel; the sleeve part is provided with at least one glue injection hole and at least one exhaust hole, the glue injection hole and the exhaust hole are communicated with the at least two glue containing grooves respectively, and the glue injection hole and the exhaust hole are formed in the intersection of the communicated glue containing grooves and one vertical groove. According to the scheme, the sealing performance can be improved, and the glue filling rate and the glue binding efficiency are high.

Description

[0001] This application is a divisional application of CN107887086A - An insulator and its gluing method. The application date of the original application is 2017-10-10, and the application number is 201710934139.7. Technical Field

[0002] The invention relates to the field of power transmission insulation equipment, in particular to an insulator and a gluing method thereof. Background Art

[0003] At present, there are two mainstream technologies for gluing flanges and insulators for insulators: gap fit gluing and interference fit gluing. However, the interference fit gluing technology cannot be widely promoted due to its technical shortcomings such as low sealing reliability and high processing precision requirements. The gap fit gluing technology has disadvantages such as low production efficiency and slow product turnover speed.

[0004] The use of horizontal gluing and sealing technology not only helps to improve the gluing and sealing rate of the product, but also can simultaneously perform the trimming, grinding, cleaning and other tasks of the insulator shed, effectively integrate the product's post-processing procedures, and improve the production efficiency of insulator products.

[0005] However, the existing technology still has defects in the horizontal binding structure and process, such as poor sealing effect, insufficient glue filling rate, and residual gas in the binding part, which hinders the further development of the horizontal binding process. Summary of the invention

[0006] The present application at least provides an insulator which can improve the sealing performance, the glue filling rate and the glue assembly efficiency.

[0007] The first aspect of the present application provides an insulator, which includes: an insulator, an umbrella skirt and a flange, wherein the umbrella skirt is covered on the outer wall of the insulator, the flange is connected to two ends of the insulator, the flange includes a base and a sleeve portion extending from the base, at least two glue-containing grooves are formed between the sleeve portion and the insulator, each glue-containing groove is formed by a first groove provided on the inner wall of the sleeve portion and / or a second groove on the outer wall of the insulator, the inner wall of the sleeve portion is provided with at least one vertical groove along the axial direction of the sleeve portion, each vertical groove is connected to at least two glue-containing grooves, and at least two glue-containing grooves are arranged around the axial direction of the insulator and are arranged parallel to each other; the sleeve portion is provided with at least one glue injection hole and at least one exhaust hole, the glue injection hole and the exhaust hole are respectively connected to at least two glue-containing grooves, and the glue injection hole and the exhaust hole are provided at the intersection of the connected glue-containing groove and a vertical groove.

[0008] Among them, at least one vertical groove includes a first vertical groove and a second vertical groove, the glue injection hole and the exhaust hole are arranged at the intersection of the first vertical groove and different glue containing grooves, and the central angle formed by the first vertical groove and the second vertical groove in the radial direction of the sleeve part is 180°.

[0009] Among them, at least one vertical groove includes a first vertical groove, a second vertical groove and a third vertical groove, the exhaust hole is arranged at the intersection of the first vertical groove and a glue containing groove, and the glue injection hole is arranged at the intersection of the third vertical groove and a glue containing groove.

[0010] Among them, the central angle formed by the first vertical groove and the second vertical groove along the radial direction of the sleeve part is 180°; the glue injection hole and the exhaust hole are located on the two generatrixes of the sleeve part, and the central angle formed by the two generatrixes along the radial direction of the sleeve part is 120° to 180°.

[0011] Among them, the inner wall of the sleeve part is provided with at least two first grooves, and the outer wall of the insulator is correspondingly provided with at least two second grooves, and the glue containing groove is formed by the cooperation of a first groove and a second groove; or, the inner wall of the sleeve part is provided with at least one first groove, and the outer wall of the insulator is provided with at least one second groove, the first groove and the second groove are staggered with each other, and the glue containing groove is formed by a first groove or a second groove.

[0012] The end face of the insulator is connected to the base, a preset sealing groove is arranged at the base connected to the end face of the insulator, the preset sealing groove is arranged around the axial direction of the insulator, and a first sealing member is arranged in the preset sealing groove.

[0013] Wherein, the height of the first sealing member is higher than the preset sealing groove.

[0014] The umbrella skirt includes a sheath portion, which is coated on the outer wall of the insulator; a second seal is provided at the connection between the sleeve portion and the sheath portion, and the second seal is arranged around the axial direction of the insulator.

[0015] The glue injection hole and the exhaust hole are located on the same generatrix of the casing part; the axes of the glue injection hole and the exhaust hole are respectively at acute angles to the axis of the casing part.

[0016] The axes of the injection hole and the exhaust hole respectively form an angle of 30° to 60° with the axis of the sleeve portion.

[0017] In the above scheme, the flanges at both ends of the insulator can be glued at the same time, which improves production efficiency, reduces the risk factor of operation, helps integrate the product's back-end processes, and reduces the floor space of the corresponding products and equipment. When injecting glue into the insulator, the glue is injected into the insulator through the injection hole, and is filled along the glue groove and the vertical groove through the intersection of the glue groove and the vertical groove. During the filling process, a large amount of gas in the glue-binding structure is discharged through the exhaust hole to improve the glue-binding quality, and at the same time, the glue filling rate can be further improved.

[0018] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and are used together with the specification to illustrate the technical solution of the present application.

[0020] Figure 1 It is a horizontal longitudinal cross-sectional schematic diagram of an embodiment of an insulator of the present application;

[0021] Figure 2 This application Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 3 It is a structural schematic diagram of an embodiment of a flange of an insulator of the present application;

[0023] Figure 4 This application Figure 3 Schematic diagram of the structure after the middle flange is rotated around the axial direction of the flange;

[0024] Figure 5 This application Figure 3 Schematic diagram of the top view of the middle flange.

[0025] Figure 6 is a horizontal longitudinal cross-sectional schematic diagram of another embodiment of the insulator of the present application;

[0026] Figure 7 This application Figure 6 A schematic diagram of the enlarged structure at B in the middle;

[0027] Figure 8 It is a structural schematic diagram of another embodiment of the flange of the insulator of the present application;

[0028] Fig. 9 This application Figure 8 Schematic diagram of the structure after the flange is rotated around the axial direction of the flange;

[0029] Fig.10 This application Figure 8 Schematic diagram of the top view structure of the flange.

[0030] Fig.11 It is a flow chart of an embodiment of an insulator gluing method of the present application. DETAILED DESCRIPTION

[0031] The scheme of the embodiment of the present application is described in detail below in conjunction with the drawings of the specification.

[0032] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0033] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the objects associated before and after are in an "or" relationship. In addition, "many" in this article means two or more than two. In addition, the term "at least one" in this article means any combination of at least two of any one or more of a plurality of, for example, including at least one of A, B, and C, can mean including any one or more elements selected from the set consisting of A, B, and C.

[0034] See also Figure 1 , Figure 1 1 is a horizontal longitudinal cross-sectional schematic diagram of an embodiment of an insulator 10 of the present application. The insulator 10 is in a horizontal state, and is a hollow insulator, comprising an insulator 11, an umbrella skirt 12, and a flange 100. The umbrella skirt 12 comprises an umbrella-shaped portion 121 and a sheath portion 122, the sheath portion 122 is covered on the outer wall of the insulator 11, and the umbrella-shaped portion 121 extends from the sheath portion 122 to a side away from the insulator 11. The flange 100 is connected to both ends of the insulator 11.

[0035] Please refer to Figure 1 , Figure 2 This application Figure 1 The flange 100 includes a base 110 and a sleeve portion 120 , and the sleeve portion 120 is covered on the outer wall of the insulator 11 .

[0036] The base 110 is connected to the end face of the insulator 11. A preset sealing groove 130 is provided on the base 110 connected to the end face of the insulator 11, which is recessed along the axial direction of the insulator 11. The preset sealing groove 130 is a rectangular groove, which is arranged axially around the insulator 11. A first sealing member 131 is placed in the preset sealing groove 130. The cross-section of the first sealing member 131 is rectangular. When placed in the preset sealing groove 130, it is slightly higher than the preset sealing groove 130. When the flange 100 is sleeved on the end of the insulator 11, the first sealing member 131 is compressed by the end face of the insulator 11 and filled in the preset sealing groove 130. A second seal 140 is provided at the connection between the sleeve portion 120 and the jacket portion 122. The cross-section of the second seal 140 is rectangular and is arranged axially around the insulator 11. When the flange 100 is sleeved on the end of the insulator 11, the jacket portion 122 and the sleeve portion 120 jointly extrude the second seal 140 and fill it between the sleeve portion 120 and the jacket portion 122.

[0037] The preset sealing groove 130 may be a wedge-shaped or racetrack-shaped groove, and the cross-sections of the first sealing member 131 and the second sealing member 140 may also be square, circular, etc. The sealing structure formed by the preset sealing groove 130, the first sealing member 131 and the second sealing member 140 is easy to process and has reliable sealing, so that a good sealing effect can be achieved between the flange 100 and the insulator 11 when no glue is filled, and the efficiency and quality of subsequent glue filling are guaranteed, so that the gas can be effectively discharged.

[0038] The glue containing groove 150 is formed between the inner wall of the sleeve portion 120 and the outer wall of the insulator 11. Specifically, in this embodiment, the inner wall of the sleeve portion 120 is provided with two first grooves 151 around the axial direction of the insulator 11, and the two first grooves 151 are arranged along the axial direction of the insulator 11. The outer wall of the insulator 11 is provided with two second grooves 152 around the axial direction of the insulator 11, and the two second grooves 152 are arranged along the axial direction of the insulator. Each first groove 151 and each second groove 152 are matched to form two glue containing grooves 150. The glue containing groove 150 is rectangular and is arranged around the axial direction of the insulator 11. The two glue containing grooves 150 are arranged parallel to each other.

[0039] In other embodiments, a plurality of glue containing grooves 150 may be provided between the inner wall of the sleeve portion 120 and the outer wall of the insulator 11. The glue containing grooves 150 may be formed by providing corresponding grooves only on the inner wall of the sleeve portion 120, or only on the outer wall of the insulator. Alternatively, grooves arranged in a staggered manner may be provided on the inner wall of the sleeve portion 120 and the outer wall of the insulator 11, respectively. The grooves are not limited to rectangular grooves, but may also be wedge-shaped, square-shaped, or the like. The mutual spacing between the plurality of glue containing grooves 150 may also be different.

[0040] In this embodiment, a first groove 151 is provided on the inner wall of the sleeve 120, and a second groove 152 is provided on the outer wall of the insulator 11, which form the corresponding glue-containing groove 150, and the processing allowance of the glue-containing groove 150 can be distributed to the sleeve 120 and the insulator 11, avoiding the strength problem that may be caused by only providing grooves on the sleeve 120 or the insulator 11. The parallel arrangement of the glue-containing grooves 150 facilitates flange machining, and also allows the glue to be evenly distributed between the sleeve 120 and the insulator 11, forming a good glue binding effect.

[0041] The sleeve portion 120 is provided with a glue injection hole 160 and an exhaust hole 170 connected to the glue holding groove 150. The glue injection hole 160 and the exhaust hole 170 are located on the same generatrix of the sleeve portion 120. The exhaust hole 170 is connected to a glue holding groove 150 away from the base 110, and the glue injection hole 160 is connected to another glue holding groove 150. The angles between the axes of the glue injection hole 160 and the exhaust hole 170 and the axis of the sleeve portion 120 are acute.

[0042] Among them, the number of the injection holes 160 and the exhaust holes 170 can be the same or different, and the specific number is not limited. The axes of the injection holes 160 and the exhaust holes 170 can be parallel to each other, or they can be at different angles of 30° to 60° with the axis of the sleeve part 120, and the injection holes 160 and the exhaust holes 170 can be tilted toward the side close to the base 110, or they can be tilted away from the side of the base 110, or the injection holes 160 and the exhaust holes 170 can be tilted to both sides respectively.

[0043] In this embodiment, the sleeve portion 120 is provided with a glue injection hole 160 and a vent hole 170, the included angles between the axes of the sleeve portion 120 and the axis of the sleeve portion 120 are 60° respectively and they are both inclined away from one side of the base 110. The glue injection hole 160 and the vent hole 170 are inclined to increase the area inside the hole, which is convenient for the injection and circulation of glue. The inclination away from the base 110 makes it convenient for the glue injection operation not to be disturbed by the base 110.

[0044] Furthermore, due to the viscosity of the glue and the gravity, when the angle between the axis of the glue injection hole 160 and the exhaust hole 170 and the axis of the sleeve 120 is 30° to 60°, the glue filling rate reaches a relatively good effect. A glue injection hole 160 and an exhaust hole 170 are provided in the sleeve, and the exhaust hole 170 is connected to the glue containing groove 150 farthest from the base 110, so that the gas can be discharged from the inside to the outside in an orderly manner, thereby avoiding the situation that the internal gas cannot be discharged when the glue solidifies and shrinks.

[0045] Please refer to Figures 3 to 5 The inner wall of the sleeve portion 120 is provided with a first vertical groove 191 and a second vertical groove 192 along the axial direction of the sleeve portion 120. The first vertical groove 191 and the second vertical groove 192 are connected to the glue containing groove 150 in the axial direction of the sleeve portion 120. The first vertical groove 191 is connected to the glue injection hole 160 and the exhaust hole 170. The second vertical groove 192 and the first vertical groove 191 are located at the two ends of a diameter along the radial direction of the sleeve portion 120, that is, the central angle formed by the first vertical groove 191 and the second vertical groove 192 in the radial direction of the sleeve portion 120 is 180°. In addition to the first vertical groove 191 and the second vertical groove 192, more vertical grooves can be provided on the inner wall of the sleeve portion 120 along the axial direction thereof, and the position of the vertical groove and the length along the radial direction of the sleeve portion 120 can be adjusted according to actual needs.

[0046] In this embodiment, two first vertical grooves 191 and second vertical grooves 192 extending along the axial direction of the sleeve part 120 are provided on the inner wall of the sleeve part 120, and are connected to the glue holding groove 150 in the axial direction of the sleeve part 120, so that the glue liquid can quickly circulate and diffuse in both the axial and radial directions during glue injection, thereby accelerating the glue injection speed. The first vertical groove 191 is connected to the exhaust hole 170 to expand the channel for gas discharge and avoid gas accumulation. The first vertical groove 191 and the second vertical groove 192 are set at two locations forming a 180° central angle in the radial direction of the sleeve part 120, so that the first vertical groove 191 and the second vertical groove 192 can be located just above and below during horizontal glue assembly. The first vertical groove 191 just above is connected to the exhaust hole 170, which is helpful for gas discharge, and the second vertical groove 192 just below is helpful for the glue liquid to flow well at the bottom position where the flange 100 is connected to the insulator 11 during glue injection, thereby avoiding the phenomenon of glue shortage at the bottom.

[0047] Please refer to Figures 6 to 10 The structure of the insulator 10 in this embodiment is basically the same as that in the previous embodiment, except that the injection hole 260 and the exhaust hole 270 are located on two different busbars of the sleeve portion 220 of the flange 200, and three vertical grooves are arranged on the inner wall of the sleeve portion 220, namely a first vertical groove 291, a second vertical groove 292 and a third vertical groove 293.

[0048] Please refer to Figure 6 and Figure 7 , Figure 7 This application Figure 6 The enlarged structural diagram of B in the figure. Two rectangular glue-containing grooves 250 are formed between the insulator 21 and the sleeve part 220. A glue injection hole 260 and an exhaust hole 270 are respectively arranged on the two busbars of the sleeve part 220 of the flange 200, wherein the exhaust hole 270 is connected to the glue-containing groove 250 away from the base 210, and the glue injection hole 260 is connected to the other glue-containing groove 250.

[0049] Please refer to Figures 8 to 10The inner wall of the sleeve portion 220 is provided with a first vertical groove 291, a second vertical groove 292 and a third vertical groove 293 along the axial direction of the sleeve portion 220. The first vertical groove 291 is connected to the exhaust hole 270, and the third vertical groove 293 is connected to the glue injection hole 260. The central angle formed by the radius of the glue injection hole 260 and the exhaust hole 270 along the radial direction of the sleeve portion 220 is 120° to 180°. Among them, the central angle formed by the first vertical groove 291 and the third vertical groove 293 along the radial direction of the sleeve portion 220 is 135°. The second vertical groove 292 and the first vertical groove 291 are located at the two ends of a diameter along the radial direction of the sleeve portion 220, that is, the central angle formed is 180°. The first vertical groove 291 and the third vertical groove 293 along the radial direction of the sleeve portion 220 can also form other angles of 120° to 180°. Furthermore, a vertical groove may be provided on the inner wall of the sleeve portion 220 which forms a central angle of 180° with the third vertical groove 293 along the radial direction of the sleeve portion 220, or vertical grooves may be provided at both ends of a diameter which is perpendicular to the diameter at which the first vertical groove 291 is located along the radial direction of the sleeve portion 220. More vertical grooves may be provided on the inner wall of the sleeve portion 220 according to actual needs.

[0050] In this embodiment, three vertical grooves are arranged on the sleeve part 220, namely, the first vertical groove 291, the second vertical groove 292 and the third vertical groove 293, wherein the third vertical groove 293 and the first vertical groove 291 are connected to the glue injection hole 260 and the exhaust hole 270 respectively, the third vertical groove 293 facilitates the rapid diversion of the glue during glue injection, and the first vertical groove 291 helps the sequential discharge of gas. The glue injection hole 260 and the exhaust hole 270 form a central angle of 120° to 180° along the radial direction of the sleeve part 220. When the insulator is glued horizontally, the exhaust hole 270 is located directly above, and the glue injection hole 260 is located obliquely below the exhaust hole 270. When the glue is injected, the gravity of the glue itself can be used to make part of the glue flow into the bottom of the insulator through the third vertical groove 293, and gradually fill from the bottom. At the same time, the second vertical groove 292 is located directly below, which is convenient for the glue to flow into the bottom to discharge the gas, thereby improving the problem of insufficient glue filling and gas accumulation at the bottom of the insulator.

[0051] In view of the high viscosity of the glue, the injection hole 260 and the exhaust hole 270 are arranged at a central angle of 120° to 180° along the radial direction of the sleeve portion 220. This ensures that the glue can use its own gravity to allow part of the glue to flow to the bottom of the insulator and gradually fill the glue from bottom to top, and avoids the problem that the exhaust hole 270 is located too high, resulting in excessive glue flowing into the upper end during injection, making it impossible to discharge the bottom gas.

[0052] In one embodiment, the steps of the insulator gluing method of the present application are as follows:

[0053] See also Fig.11 , Fig.11 This is a flow chart of an embodiment of the insulator gluing method of the present application. The method comprises the following steps:

[0054] S1. Arrange a first sealing member in a preset sealing groove of the flange base;

[0055] S2. Arrange a second sealing member on the insulator;

[0056] S3, sleeve the sleeve portion of the flange onto the outer wall of the insulator;

[0057] S4, injecting the glue liquid into the glue holding tank through the glue injection hole, so that the gas is discharged from the exhaust hole;

[0058] S5. When the glue liquid overflows from the exhaust hole, stop injecting the glue liquid.

[0059] Please refer to the above insulator embodiment Figures 2 to 4 In this embodiment, the insulator 10 is taken as an example. The insulator 10 is placed horizontally. First, a first sealing member 131 is placed in a preset sealing groove 130 of the base 110 of the flange 100. The first sealing member 131 is slightly higher than the preset sealing groove 130.

[0060] A second sealing member 140 is sleeved on the insulator 11 so that the second sealing member 140 is close to the end of the sheath portion 122 of the shed 12, which is the connection interface with the sleeve portion 120 of the flange 100;

[0061] The sleeve portion 120 of the flange 100 is sleeved on the outer wall of the insulator 11, so that the end surface of the insulator 11 presses the first sealing member 131 in the preset sealing groove 130, and the sleeve portion 120 presses the second sealing member 140 sleeved on the end of the sheath portion 122, thereby achieving sealing between the flange 100 and the insulator 11;

[0062] The exhaust hole 170 is located at the top, the glue injection hole 160 and the exhaust hole 170 are located on the same busbar of the sleeve part 120, the glue injection hole 160 and the exhaust hole 170 are respectively connected to the glue containing groove 150, and the glue containing groove 150 is composed of the inner wall of the sleeve part 120 and the outer wall of the insulator 11. The glue liquid is injected through the glue injection hole 160, and the glue liquid is diverted to the two glue containing grooves 150 by the first vertical groove 191 or the second vertical groove 192, and the gas is gradually discharged from the exhaust hole 170;

[0063] The glue liquid is continuously injected into the glue injection hole 160 until the glue liquid overflows from the exhaust hole 170 , and then the glue liquid injection is stopped.

[0064] The gluing method of the insulator of this embodiment is as follows: Figures 2 to 4 For example, the insulator in Figures 6 to 10 The insulator in the embodiment has the same operation steps. In this embodiment, steps S1 to S5 can be adjusted accordingly according to the actual process flow, and are not limited to the operation sequence in this embodiment.

[0065] The insulator gluing method of this embodiment adopts horizontal gluing means, so that the flanges at both ends of the insulator can be glued at the same time, which improves production efficiency. Insulators are generally large in mass and volume. Compared with traditional vertical gluing, horizontal gluing reduces the risk factor of operation, helps to integrate the processes such as shed cleaning and trimming with the gluing process, and reduces the floor space of corresponding products and equipment. The horizontal gluing method greatly improves the filling rate of the glue liquid through the use of the sealing structure with the glue injection hole and the exhaust hole, avoids the situation where a large amount of gas in the gluing structure cannot be discharged, and improves the quality of the insulator gluing.

[0066] Those skilled in the art will appreciate that, in the above method of specific implementation, the order in which the steps are written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of the steps should be determined by their functions and possible internal logic.

Claims

1. An insulator, comprising an insulator, an shed and a flange, wherein the shed is covered on the outer wall of the insulator, the flange is connected to both ends of the insulator, and the flange comprises a base and a sleeve portion extending from the base, wherein: At least two adhesive containing grooves are formed between the sleeve portion and the insulator, each of the adhesive containing grooves is formed by a first groove provided on the inner wall of the sleeve portion and / or a second groove on the outer wall of the insulator, the inner wall of the sleeve portion is provided with at least one vertical groove along the axial direction of the sleeve portion, each of the vertical grooves is connected to the at least two adhesive containing grooves, and the at least two adhesive containing grooves are provided around the axial direction of the insulator and are arranged parallel to each other; The sleeve portion is provided with at least one glue injection hole and at least one exhaust hole, the glue injection hole and the exhaust hole are respectively connected to the at least two glue containing grooves, and the glue injection hole and the exhaust hole are arranged at the intersection of the connected glue containing groove and one of the vertical grooves.

2. The insulator according to claim 1, characterized in that: The at least one vertical groove includes a first vertical groove and a second vertical groove. The glue injection hole and the exhaust hole are arranged at the intersection of the first vertical groove and different glue containing grooves. The central angle formed by the first vertical groove and the second vertical groove in the radial direction of the sleeve part is 180°.

3. The insulator according to claim 1, characterized in that: The at least one vertical groove includes a first vertical groove, a second vertical groove and a third vertical groove, the exhaust hole is arranged at the intersection of the first vertical groove and a glue containing groove, and the glue injection hole is arranged at the intersection of the third vertical groove and a glue containing groove.

4. The insulator according to claim 3, characterized in that: The central angle formed by the first vertical groove and the second vertical groove along the radial direction of the sleeve portion is 180°; The glue injection hole and the exhaust hole are located on two generatrixes of the sleeve portion, and the central angle formed by the two generatrixes along the radial direction of the sleeve portion is 120° to 180°.

5. The insulator according to claim 1, characterized in that: The inner wall of the sleeve portion is provided with at least two first grooves, and the outer wall of the insulator is correspondingly provided with at least two second grooves, and the glue containing groove is formed by the cooperation of the first groove and the second groove; Alternatively, the inner wall of the sleeve portion is provided with at least one first groove, and the outer wall of the insulator is provided with at least one second groove, the first groove and the second groove are arranged staggered with each other, and the glue containing groove is formed by one of the first grooves or one of the second grooves.

6. The insulator according to claim 1, characterized in that: The end face of the insulator is connected to the base, and a preset sealing groove is arranged at the base connected to the end face of the insulator. The preset sealing groove is arranged around the axial direction of the insulator, and a first sealing member is arranged in the preset sealing groove.

7. The insulator according to claim 6, characterized in that: The height of the first sealing member is higher than the preset sealing groove.

8. The insulator according to claim 1, characterized in that: The shed comprises a sheath portion, and the sheath portion is covered on the outer wall of the insulator; A second sealing member is disposed at a connection between the sleeve portion and the sheath portion, and the second sealing member is disposed around the axial direction of the insulator.

9. The insulator according to claim 1, characterized in that: The glue injection hole and the exhaust hole are located on the same generatrix of the sleeve portion; The axes of the glue injection hole and the exhaust hole respectively form an acute angle with the axis of the sleeve portion.

10. The insulator according to claim 9, characterized in that: The axes of the glue injection hole and the exhaust hole respectively form an angle of 30° to 60° with the axis of the sleeve portion.

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