Sealing assembly for solid-sealed polar pole and solid-sealed polar pole

Abstract

The utility model relates to the field of switch contact operating mechanisms, and provides a sealing assembly for a solid-sealed polar pole and the solid-sealed polar pole, the sealing assembly for the solid-sealed polar pole comprises a first blocking silica gel, the middle part of the first blocking silica gel is provided with a central hole for an insulating pull rod of the solid-sealed polar pole to pass through; the first barrier silica gel comprises a first inner ring block which is arranged in a sealing manner with the insulating pull rod, a first outer ring block which is arranged in a sealing manner with the inner side of the solid-sealed polar pole, and a first arc-shaped connecting surface which is connected between the first inner ring block and the first outer ring block; the thickness of the first outer ring block is larger than that of the first arc-shaped connecting face. According to the solid-sealed polar pole, the two layers of barrier silica gel are designed, so that the air tightness of the inner cavity is well guaranteed, the requirement for the insulation creepage distance is shortened, the height of the solid-sealed polar pole and the height of the insulation pull rod are reduced, the size and weight of the whole solid-sealed polar pole are reduced to a great extent, and the effects of light weight and miniaturization of the solid-sealed polar pole are achieved.

Description

Technical Field

[0001] The utility model relates to the field of switch contact operating mechanisms, and particularly to a sealing component for a solid-sealed pole column and a solid-sealed pole column. Background Art

[0002] With the development of information technology, the power grid is gradually becoming intelligent and digital. The application of smart grid technology enables the power grid to monitor, manage, and maintain more efficiently, improving the safety and stability of the power grid. At the same time, it urges the lightweight and miniaturization process of high-voltage switchgear, so as to more effectively save space, reduce costs, improve efficiency, and meet the requirements of specific occasions.

[0003] As one of the most widely distributed devices, the solid-sealed pole column is an important carrier for realizing the concept of intelligent lightweight and miniaturization of the distribution network. The reasons for the large volume of the solid-sealed pole column are as follows: First, it is necessary to increase the inner cavity insulation creepage distance, thus increasing the volume of the inner cavity; Second, due to the design of the petticoat structure, the structure of the inner cavity cannot be designed smaller. Specifically, a sufficient creepage distance is required between the high potential and the low potential. However, in order to reduce the overall height, both the inside and outside of the solid-sealed pole column are made into petticoat structures to extend the creepage distance. However, due to the limited space in the inner cavity and the influence of mold demolding, the inner cavity petticoat cannot achieve a large height difference like the outer petticoat. Therefore, even if there is a petticoat in the inner cavity, the overall inner cavity still requires a relatively high height to meet the requirement of a long insulation creepage distance. Thus, the entire solid-sealed pole column needs to be designed with a large volume. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a sealing component for a solid-sealed pole column and a solid-sealed pole column, aiming to improve the problem of the large volume of the existing solid-sealed pole column.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: A sealing component for a solid-sealed pole column, including a first barrier silica gel, and a central hole for the insulating pull rod of the solid-sealed pole column to pass through is arranged in the middle of the first barrier silica gel;

[0006] The first barrier silica gel includes a first inner ring block sealed with the insulating pull rod, a first outer ring block sealed with the inner side of the solid-sealed pole column, and a first arc connecting surface connecting the first inner ring block and the first outer ring block;

[0007] The thickness of the first outer ring block is greater than the thickness of the first arc connecting surface.

[0008] Preferably, the outer side surface of the first outer ring block is a stepped surface.

[0009] Preferably, a silicone grease layer is provided between the first inner ring block and the insulating pull rod, and between the first outer ring block and the inner side wall of the solid-sealed pole column.

[0010] Preferably, it further includes a second barrier silica gel, and the second barrier silica gel and the first barrier silica gel are stacked between the solid-sealed pole column and the insulating pull rod; the second barrier silica gel includes a second inner ring block hermetically arranged with the insulating pull rod, a second outer ring block hermetically arranged with the inner side of the solid-sealed pole column, and a second arc-shaped connecting surface connecting the second inner ring block and the second outer ring block; the thickness of the second outer ring block is greater than the thickness of the second arc-shaped connecting surface, and a placement surface for placing the second outer ring block is provided on the top surface of the first outer ring block.

[0011] Preferably, a sealing groove fitted with the bottom of the second outer ring block is provided on the placement surface.

[0012] Preferably, one end of the first arc-shaped connecting surface is arranged on the inner circumferential surface of the top surface of the first outer ring block, and the other end of the first arc-shaped connecting surface is arranged on the top of the inner side surface of the first inner ring block.

[0013] Preferably, one end of the second arc-shaped connecting surface is arranged on the inner circumferential surface of the top surface of the second outer ring block, and the sealing groove is arranged in the middle of the top surface of the second outer ring block or is aligned with the outer circumferential surface on one side; the other end of the second arc-shaped connecting surface is arranged on the top of the inner side surface of the second inner ring block.

[0014] Preferably, it further includes a first support ring and a second support ring, the first support ring is arranged on the inner circumferential surface of the first barrier silica gel, and the second support ring is arranged on the inner circumferential surface of the second barrier silica gel.

[0015] There is also provided a solid-sealed pole column, including:

[0016] A sealing assembly, such as the sealing assembly for the solid-sealed pole column as described above; and

[0017] A pole column body, in which an insulating pull rod is arranged, the inner wall of the pull rod cavity for placing the insulating pull rod in the pole column body is a smooth surface, and the insulating pull rod is a smooth rod.

[0018] Preferably, a stepped groove fitted with the stepped surface of the sealing assembly is provided at the outlet end of the pull rod cavity; the depth of the stepped groove is equal to the sum of the height of the first outer ring block and the height of the second outer ring block of the sealing assembly.

[0019] Preferably, a first convex ring and a second convex ring are arranged at intervals on the lead-out section of the insulating pull rod, a first limiting groove engaged with the first convex ring is provided on the first inner ring block, and a second limiting groove engaged with the second convex ring is provided on the second inner ring block.

[0020] After adopting the above technical solution, compared with the background art, the utility model has the following advantages:

[0021] 1. At the outlet of the insulating pull rod of the solid-sealed pole column, through the structural design of the barrier silica gel, a good sealing effect can be achieved. The good sealing and blocking effect can reduce the creepage distance of the internal cavity insulation, and thus can achieve the purpose of reducing the structural size of the internal cavity.

[0022] 2. The design of two layers of barrier silica gel can well guarantee the airtightness of the internal cavity, shorten the requirement for the creepage distance of insulation, reduce the height of the solid-sealed pole column and the insulating pull rod, and thus greatly reduce the volume and weight of the overall solid-sealed pole column, achieving the effect of lightweight and miniaturization of the solid-sealed pole column.

[0023] 3. Using barrier silica gel in the solid-sealed pole column can eliminate the need to design the petticoat structure. In this way, the design of the internal cavity structure can be changed, and then the designed volume of the internal cavity can be reduced, achieving the effect of lightweight and miniaturization of the solid-sealed pole column. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic structural diagram of the first barrier silica gel of the sealing component for the solid-sealed pole column described in the utility model;

[0025] Figure 2 Cross-sectional view of the first barrier silica gel of the sealing component for the solid-sealed pole column described in the utility model;

[0026] Figure 3 Schematic structural diagram of the second barrier silica gel of the sealing component for the solid-sealed pole column described in the utility model;

[0027] Figure 4 Cross-sectional view of the second barrier silica gel of the sealing component for the solid-sealed pole column described in the utility model;

[0028] Figure 5 Schematic structural diagram of the sealing component for the solid-sealed pole column described in the utility model in the assembled state;

[0029] Figure 6 Schematic diagram of the sealing component for the solid-sealed pole column described in the utility model having a support ring structure;

[0030] Figure 7 Schematic diagram of another embodiment of the sealing component for the solid-sealed pole column described in the utility model having a support ring structure;

[0031] Figure 8 Schematic structural diagram of the solid-sealed pole column described in the utility model.

[0032] Description of the reference numerals:

[0033] 1. Sealing assembly; 2. Pole column body; 3. Insulating pull rod;

[0034] 21. Step groove; 31. First convex ring; 32. Second convex ring;

[0035] 10. First barrier silica gel; 101. First inner ring block; 102. First outer ring block; 103. First arc connecting surface; 104. Step surface; 105. Placing surface;

[0036] 1011. First limiting groove;

[0037] 20. Second barrier silica gel; 201. Second inner ring block; 202. Second outer ring block; 203. Second arc connecting surface;

[0038] 2012. Second limiting groove;

[0039] 30. First support ring; 40. Second support ring. Detailed implementation manner

[0040] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0041] In addition, it should be noted that: the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element of the present utility model must have a specific orientation, so it cannot be understood as a limitation to the present utility model.

[0042] When an element is referred to as "fixed to" or "set on" or "provided on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0043] Unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to specific situations.

[0044] Embodiment 1

[0045] Please refer to Figure 1 、 Figure 2 and Figure 5 As shown, this embodiment provides a sealing assembly 1 for a solid-sealed pole column, including a first barrier silica gel 10. A central hole for the insulating pull rod 3 of the solid-sealed pole column to pass through is provided in the middle of the first barrier silica gel 10. The first barrier silica gel 10 includes a first inner ring block 101 that is hermetically arranged with the insulating pull rod 3, a first outer ring block 102 that is hermetically arranged with the inner side of the solid-sealed pole column, and a first arc-shaped connecting surface 103 connecting the first inner ring block 101 and the first outer ring block 102. The thickness of the first outer ring block 102 is greater than the thickness of the first arc-shaped connecting surface 103.

[0046] In this embodiment, the first barrier silica gel 10 is made of silica gel material and has good insulation. Therefore, when it is hermetically installed at the port of the insulating pull rod 3 of the solid-sealed pole column, the interference fit installation method can ensure the assembly tightness, and can achieve good barrier and insulation effects, reduce the creepage distance of the inner cavity insulation, and further achieve the purpose of reducing the structural size of the inner cavity.

[0047] Specifically, the insulating pull rod 3 is passed through the central hole and sleeved with the ring surface of the first inner ring block 101 in an interference fit manner, so that the central end of the first barrier silica gel 10 is stably installed on the insulating pull rod 3. The first outer ring block 102 is also installed on the inner wall of the solid-sealed pole column by an interference fit manner, forming a sealing installation effect on both ends of the first barrier silica gel 10. And the thickness of the first outer ring block 102 is designed to be relatively thick, so that the structural strength of the first outer ring block 102 can be improved, which is beneficial to the interference fit and ensures the assembly tightness. Further, the thickness of the first arc-shaped connecting surface 103 is relatively thin, so as to cooperate with the opening and closing action of the insulating pull rod 3 and move synchronously. Coupled with the arc-shaped structural design, the structure of the first barrier silica gel 10 is stable, not easily damaged, and the service life is improved.

[0048] Furthermore, the curvature of the arc surface of the first arc-shaped connecting surface 103 can be designed according to different models of solid-sealed pole columns. If the stroke of the insulating pull rod 3 is large, the curvature of the arc surface of the first arc-shaped connecting surface 103 is correspondingly increased; on the contrary, if the stroke of the insulating pull rod 3 is small, the curvature of the arc surface of the first arc-shaped connecting surface 103 is correspondingly decreased to achieve good fit. However, it does not exclude that for a small stroke of the insulating pull rod 3, a structure with a large curvature of the arc surface of the arc-shaped connecting surface is also used.

[0049] Such as Figure 2 and Figure 5As shown, in this embodiment, the outer side surface of the first outer ring block 102 is a stepped surface 104. After the installation of the first outer ring block 102 is completed (the first outer ring block 102 is located at the port of the solid-sealed pole column and will be abutted and fixed by the cover plate of the port), when the first barrier silicone 10 moves along with the insulating pull rod 3, the first outer ring block 102 will not move, so as to improve the structural stability.

[0050] In this embodiment, a silicone grease layer (not shown) is provided between the first inner ring block 101 and the insulating pull rod 3 and between the first outer ring block 102 and the inner side wall of the solid-sealed pole column. The design of the silicone grease layer can ensure the sealing performance of the fit and prevent the occurrence of a fit gap. Moreover, the silicone grease layer formed by applying the silicone grease improves the service life of the sealing performance of the fit and has good practicability.

[0051] As Figure 3 、 Figure 4 and Figure 5 shown, this embodiment further includes a second barrier silicone 20. The second barrier silicone 20 and the first barrier silicone 10 are stacked between the solid-sealed pole column and the insulating pull rod 3; the second barrier silicone 20 includes a second inner ring block 201 hermetically arranged with the insulating pull rod 3, a second outer ring block 202 hermetically arranged with the inner side of the solid-sealed pole column, and a second arc-shaped connecting surface 203 connecting the second inner ring block 201 and the second outer ring block 202; the thickness of the second outer ring block 202 is greater than the thickness of the second arc-shaped connecting surface 203, and a placement surface 106 for placing the second outer ring block 202 is provided on the top surface of the first outer ring block 102.

[0052] Specifically, the design of the second barrier silicone 20 and the first barrier silicone 10 can form a double-layer barrier silicone structure design at the outlet of the solid-sealed pole column. In this way, the sealing performance, the structural reliability, the barrier and insulation performance can be further improved. That is, the design of the two-layer barrier silicone has a good guarantee for the airtightness of the inner cavity, shortens the requirement for the insulation creepage distance, reduces the height of the solid-sealed pole column and the insulating pull rod 3, and thus greatly reduces the volume and weight of the overall solid-sealed pole column, achieving the effect of lightweight and miniaturization of the solid-sealed pole column.

[0053] Furthermore, in this embodiment, a sealing groove (not shown) that fits with the bottom of the second outer ring block 202 can be provided on the placement surface 106. Through the sealing groove, a stable stacked design of the two barrier silicones can be achieved, and at the same time, they can be adhered by applying silicone grease to improve the sealing performance and the structural stability.

[0054] Furthermore, as Figure 5 shown, in this embodiment, one end of the first arc-shaped connecting surface 103 is arranged on the inner circumferential surface of the top surface of the first outer ring block 102, and the other end of the first arc-shaped connecting surface 103 is arranged on the top of the inner side surface of the first inner ring block 101.

[0055] Specifically, the first inner ring block 101 needs to move along with the insulating pull rod 3. Therefore, the connecting end of the first arc and the first inner ring block 101 is connected horizontally, which can smoothly pull the first arc connecting surface 103 and is not easily damaged. The connection between the first arc connecting surface 103 and the first outer ring block 102 is vertically led out from the top surface of the first outer ring block 102. In this way, when stacking the first barrier silicone 10 and the second barrier silicone 20, effective avoidance can be formed, improving the practicability.

[0056] In this embodiment, one end of the second arc connecting surface 203 is arranged on the inner circumferential surface of the top surface of the second outer ring block 202, and the sealing groove is arranged in the middle of the top surface of the second outer ring block 202 or is aligned with the outer circumferential surface on one side; the other end of the second arc connecting surface 203 is arranged on the top of the inner side surface of the second inner ring block 201.

[0057] Specifically, similar to the design principle of the first barrier silicone 10, the connection mode of the second barrier silicone 20 to the second arc connecting surface 203 is the same. At the same time, the width of the second outer ring block 202 is relatively wider than that of the first outer ring block 102, so it is convenient to place the first outer ring block 102. Therefore, the design of the vertically led-out second arc connecting surface 203 can form good avoidance and a reasonable structural design.

[0058] As Figure 6 and Figure 7 shown, this embodiment further includes a first support ring 30 and a second support ring 40. The first support ring 30 is arranged on the inner circumferential surface of the first barrier silicone 10, and the second support ring 40 is arranged on the inner circumferential surface of the second barrier silicone 20. A step groove can also be arranged at one end of the second support ring 40, so as to support and place the second inner ring block, corresponding to supporting the position of the second barrier silicone 20 in the solid-sealed pole column, forming a top and support effect.

[0059] Specifically, the first support ring 30 and the second support ring 40 can be rigid ring bodies, such as glass rings or rigid plastic rings, etc. The first support ring 30 cooperates with the inner cavity of the solid-sealed pole column to top and clamp the first inner ring block (a certain margin of low pressure can be applied to the first inner ring block to form a fixed seal), forming a stable support and fixation, that is, sealing and fixing the first inner ring block; similarly, the second support ring 40 cooperates with the inner cavity of the solid-sealed pole column to top and clamp the second inner ring block, sealing and fixing the second inner ring block. If the first barrier silicone 10 or the second barrier silicone 20 has good sealing performance, the corresponding first support ring 30 and second support ring 40 can be removed to improve the flexibility of use.

[0060] Embodiment 2

[0061] Please refer to Figure 5and Figure 8 As shown in Figure 8 , in this embodiment, a solid-sealed pole column is provided, which includes a sealing component 1 and a pole column body 2. The sealing component 1 is the sealing component 1 used for the solid-sealed pole column as described in Embodiment 1. An insulating pull rod 3 is arranged in the pole column body 2. The inner wall of the pull rod cavity in the pole column body 2 for placing the insulating pull rod 3 is a smooth surface, and the insulating pull rod 3 is a smooth rod.

[0062] Specifically, the design of the smooth rod and the smooth surface, that is, canceling the umbrella skirt design of the solid-sealed pole column and the insulating pull rod 3, can reduce the design volume of the inner cavity of the solid-sealed pole column, achieving the effect of lightweight and miniaturization of the solid-sealed pole column. Due to the design of the sealing component 1, the barrier property and insulation property inside the solid-sealed pole column can be ensured, reducing the height of the solid-sealed pole column and the insulating pull rod 3, thereby greatly reducing the volume and weight of the overall solid-sealed pole column and achieving the effect of lightweight and miniaturization of the solid-sealed pole column.

[0063] As Figure 8 shown in Figure 8 , in this embodiment, a stepped groove 21 is provided at the outlet end of the pull rod cavity, which is sleeved with the stepped surface 104 of the sealing component 1. The groove depth of the stepped groove 21 is equal to the sum of the height of the first outer ring block 102 and the height of the second outer ring block 202 of the sealing component 1. In this way, a stable assembly effect can be achieved with the barrier silica gel of the sealing component 1 to prevent the barrier silica gel from shifting when following the movement of the insulating pull rod 3 and improve the stability of the structural design.

[0064] As Figure 5 shown in Figure 5 , in this embodiment, a first convex ring 31 and a second convex ring 32 are arranged at intervals on the lead-out section of the insulating pull rod 3. A first limiting groove 1011 for engaging with the first convex ring 31 is arranged on the first inner ring block 101, and a second limiting groove 2012 for engaging with the second convex ring 32 is arranged on the second inner ring block 201.

[0065] Specifically, a convex ring structure is designed on the insulating pull rod 3. After the engagement between the limiting groove and the convex ring and the bonding with silicone grease applied, the first inner ring block 101 and the second inner ring block 201 can be stably installed on the insulating pull rod 3, and at the same time, the situation that the first inner ring block 101 or the second inner ring block 201 shifts due to the movement of the insulating pull rod 3 will not occur, improving the stability of the structure.

[0066] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A sealing assembly for sealing a pole, characterized in that: It comprises a first barrier silicone, wherein a central hole is provided in the middle of the first barrier silicone for the insulating pull rod of the sealed pole to pass through; The first barrier silicone comprises a first inner ring block sealed with the insulating pull rod, a first outer ring block sealed with the inner side of the sealed pole, and a first arc-shaped connecting surface connecting the first inner ring block and the first outer ring block; The thickness of the first outer ring block is greater than the thickness of the first arc-shaped connecting surface.

2. The sealing assembly for sealing a pole according to claim 1, characterized in that: The outer side surface of the first outer ring block is a step surface.

3. The sealing assembly for sealing a pole according to claim 1, characterized in that: A silicone grease layer is provided between the first inner ring block and the insulating pull rod and between the first outer ring block and the inner side wall of the sealed pole.

4. The sealing assembly for sealing a pole according to claim 1, characterized in that: It also includes a second barrier silicone, which is stacked with the first barrier silicone and arranged between the sealed pole and the insulating pull rod; The second insulating silicone comprises a second inner ring block sealed with the insulating pull rod, a second outer ring block sealed with the inner side of the sealed pole, and a second arc-shaped connecting surface connecting the second inner ring block and the second outer ring block; The thickness of the second outer ring block is greater than the thickness of the second arc-shaped connecting surface, and the top surface of the first outer ring block is provided with a placement surface for placing the second outer ring block; The placement surface is provided with a sealing groove which is engaged with the bottom of the second outer ring block.

5. The sealing assembly for sealing a pole according to claim 4, characterized in that: One end of the first arc-shaped connecting surface is arranged on the inner ring surface of the top surface of the first outer ring block, and the other end of the first arc-shaped connecting surface is arranged on the top of the inner side surface of the first inner ring block.

6. The sealing assembly for sealing a pole according to claim 4, characterized in that: One end of the second arc-shaped connecting surface is arranged on the inner annular surface of the top surface of the second outer ring block, and the sealing groove is arranged in the middle or one side of the top surface of the second outer ring block and is aligned with the outer annular surface; The other end of the second arc-shaped connecting surface is arranged on the top of the inner side surface of the second inner ring block.

7. The sealing assembly for sealing a pole according to claim 4, characterized in that: It also includes a first support ring and a second support ring, wherein the first support ring is arranged on the inner ring surface of the first barrier silicone rubber, and the second support ring is arranged on the inner ring surface of the second barrier silicone rubber.

8. A sealed pole, characterized in that: include: A sealing assembly, a sealing assembly for a solid-sealed pole according to any one of claims 1 to 7; and The pole body has an insulating pull rod arranged therein, the inner wall of a pull rod cavity of the pole body in which the insulating pull rod is placed is a smooth surface, and the insulating pull rod is a smooth rod.

9. The sealed pole according to claim 8, characterized in that: The outlet end of the pull rod chamber is provided with a stepped groove which fits with the step surface of the sealing assembly; The depth of the stepped groove is equal to the sum of the height of the first outer ring block of the sealing assembly and the height of the second outer ring block.

10. The sealed pole according to claim 8, characterized in that: A first convex ring and a second convex ring are arranged at intervals on the lead-out section of the insulating pull rod, a first limiting groove engaged with the first convex ring is arranged on the first inner ring block, and a second limiting groove engaged with the second convex ring is arranged on the second inner ring block.

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