Pot-type insulator with distributed heat conducting elements and tank-type vacuum circuit breaker

Abstract

The application provides a basin-type insulator with distributed heat-conducting elements, and a tank-type vacuum circuit breaker using the same. The basin-type insulator has a good heat-conducting effect, and when installed in the tank-type vacuum circuit breaker, the heat-conducting path of the tank-type vacuum circuit breaker to the tank body is increased, thereby improving the heat-dissipating effect. The basin-type insulator comprises: an outer heat-conducting ring located at the outer side of the basin-type insulator and used for contacting the tank body; an intermediate electrically-conductive structure located at the middle of the basin-type insulator and used for connecting a heat-generating end; a basin-type insulator insulating structure located between the intermediate electrically-conductive structure and the outer heat-conducting ring; and a high-heat-conducting element array structure located in the basin-type insulator insulating structure and used for conducting heat, comprising a plurality of high-heat-conducting elements, one end of each high-heat-conducting element being connected to the intermediate electrically-conductive structure and the other end being connected to the outer heat-conducting ring.

Description

Technical Field

[0001] This invention relates to the field of basin insulator technology, specifically to basin insulators with distributed heat-conducting elements and tank-type vacuum circuit breakers. Background Technology

[0002] With the rapid development and widespread application of vacuum circuit breakers in high-voltage levels, the demand for them as core switching devices in power transmission and distribution networks is increasing, especially when applied to tank-type circuit breakers. In the high-voltage field, vacuum circuit breakers not only need to have reliable arc breaking capability, but also need to meet the current carrying requirements for continuous operation under rated current.

[0003] In existing tank-type vacuum circuit breakers, both ends of the vacuum interrupter are insulated support structures, which hinders the heat conduction from the vacuum interrupter to the tank body. This is very unfavorable for the heat dissipation of the vacuum interrupter, which leads to higher thermal conductivity requirements for high-voltage tank-type vacuum circuit breakers. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a basin-type insulator with distributed heat-conducting elements, and also provides a tank-type vacuum circuit breaker using the basin-type insulator. The basin-type insulator has good thermal conductivity, and when installed in a tank-type vacuum circuit breaker, it increases the heat transfer and heat dissipation path from the tank-type vacuum circuit breaker to the tank body, thereby improving the heat dissipation effect.

[0005] The technical solution is as follows: a basin-type insulator with distributed heat-conducting elements, characterized in that: it is installed inside a tank-type vacuum circuit breaker to conduct heat from the heating end to the tank body, and includes: an outer heat-conducting ring, which is located on the outside of the basin-type insulator and is used to contact the tank body;

[0006] An intermediate conductive structure is located in the middle of the basin-type insulator and is used to connect the heating end;

[0007] A basin-type insulator insulation structure, wherein the basin-type insulator insulation structure is located between the intermediate conductive structure and the outer heat-conducting ring;

[0008] A high thermal conductivity element array structure is located inside the basin-type insulator insulation structure and is used to conduct heat.

[0009] The high thermal conductivity element array structure includes multiple high thermal conductivity elements, one end of which is connected to the intermediate conductive structure and the other end of which is connected to the outer thermal conductive ring.

[0010] Furthermore, the high thermal conductivity elements are arranged in a ring, each of the high thermal conductivity elements includes a heat-conducting rod and multiple umbrella-shaped structural units, the multiple umbrella-shaped structural units are spaced apart and coaxially connected to the heat-conducting rod, the high thermal conductivity elements are solid or hollow structures, and the high thermal conductivity elements are made of high thermal conductivity insulating materials.

[0011] Furthermore, each of the umbrella-shaped structural units comprises multiple layers of umbrella skirts.

[0012] Furthermore, the diameter of the umbrella-shaped structural unit in each unit gradually increases or decreases along the axial direction of the heat-conducting rod.

[0013] Furthermore, the diameter of the umbrella-shaped structural unit ranges from 20% to 80% of the thickness of the basin insulator; the length of the umbrella-shaped structural unit is 1% to 20% of the diameter of the basin insulator; and the number of umbrellas contained in the umbrella-shaped structural unit is 2 to 10.

[0014] Furthermore, the umbrella-shaped structural units in adjacent high thermal conductivity elements are staggered.

[0015] Furthermore, the outer heat-conducting ring is a circular ring with the same thickness as the basin insulator, covering the basin insulator insulation structure from the outside and coaxial with the basin insulator insulation structure; the inner side of the outer heat-conducting ring has circular holes and grooves consistent with the number of high thermal conductivity elements, for fixed connection of the high thermal conductivity elements; the outer heat-conducting ring is made of insulating material.

[0016] Furthermore, the intermediate conductive structure is annular in shape and has the same thickness as the basin-type insulator, and is coaxial with the basin-type insulator insulation structure; the outer side of the intermediate conductive structure has circular holes and grooves with the same number as the high thermal conductivity elements, for fixing and connecting the high thermal conductivity elements; the intermediate conductive structure is made of conductive material.

[0017] Furthermore, the basin-type insulator has a planar or inclined ring-shaped insulating structure, and its hollow interior portion matches the outer contour of the high thermal conductivity element; the axis of the high thermal conductivity element coincides with or is parallel to the radial direction of the basin-type insulator.

[0018] A tank-type vacuum circuit breaker includes a vacuum interrupter and a tank body. The vacuum interrupter is located inside the tank body and includes a stationary conductive structure located at the middle position on one side of the tank body and a moving conductive structure located at the middle position on the other side of the tank body. The stationary conductive structure and the moving conductive structure are respectively equipped with the aforementioned basin-type insulator and are in contact with the middle conductive structure of the basin-type insulator. The outer heat-conducting ring of the basin-type insulator is in contact with the tank body.

[0019] Beneficial effects: 1. The present invention improves the thermal conductivity of the basin insulator through the design of the basin insulator, increases the heat transfer and heat dissipation path from the vacuum circuit breaker to the tank, reduces the temperature rise at key locations in the vacuum interrupter, and thus increases the rated current of the vacuum circuit breaker during use.

[0020] 2. By using a cylindrical high thermal conductivity element with an umbrella skirt structure unit, this invention fully utilizes the performance of the high thermal conductivity element while avoiding affecting the mechanical strength and insulation withstand voltage performance of the pot-type insulator, thus achieving optimized design of the electric field of the pot-type vacuum circuit breaker under high voltage. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a basin-type insulator.

[0022] Figure 2 This is a schematic diagram of the internal structure of a basin-type insulator.

[0023] Figure 3 This is a cross-sectional schematic diagram of a basin-type insulator.

[0024] Figure 4 This is a schematic diagram of the intermediate conductive structure;

[0025] Figure 5 This is a schematic diagram of a high thermal conductivity element array structure;

[0026] Figure 6 This is a schematic diagram of a high thermal conductivity element;

[0027] Figure 7 This is a schematic diagram of a tank-type vacuum circuit breaker. Detailed Implementation

[0028] like Figure 1 The basin-type insulator 201 shown has distributed heat-conducting elements and is installed inside a tank-type vacuum circuit breaker to conduct heat from the heating end to the tank body. Figure 2 , Figure 3 It includes: an outer heat-conducting ring 301, located on the outside of the basin-type insulator 201 for contact with the tank body; a middle conductive structure 303, located in the middle of the basin-type insulator 201 for connecting the heating end; a basin-type insulator insulation structure 302, located between the middle conductive structure 303 and the outer heat-conducting ring 301; and a high thermal conductivity element array structure 304, located inside the basin-type insulator insulation structure 302 for conducting heat; wherein, the high thermal conductivity element array structure 304 includes, for example, Figure 6The multiple high thermal conductivity elements 401 shown have one end connected to the middle conductive structure 303 and the other end connected to the outer thermal conductive ring 301, forming a complete heat conduction path from the center of the basin insulator 201 to the outside, so as to dissipate heat more efficiently and quickly.

[0029] Combination Figure 5 , Figure 6 The high thermal conductivity elements 401 are arranged in a ring, equidistantly distributed along the circumference of the basin insulator 201 and extending radially along the basin insulator 201. Each high thermal conductivity element includes a heat-conducting rod and multiple umbrella-shaped structural units 701, which are spaced apart and coaxially connected to the heat-conducting rod. The high thermal conductivity elements can be solid or hollow; the high thermal conductivity elements 401 are made of non-metallic high thermal conductivity insulating material or are vacuum heat pipe structures. The diameter of the umbrella-shaped structural unit 701 ranges from 20% to 80% of the thickness of the basin insulator 201; the length of the umbrella-shaped structural unit 701 is 1% to 20% of the diameter of the basin insulator 201; and the number of umbrellas contained in the umbrella-shaped structural unit 701 is 2 to 10. Traditional basin insulators primarily focus on insulation withstand voltage performance, and the materials used have low thermal conductivity. This solution improves the thermal conductivity of basin insulators by adding array-structured, umbrella-skirt-like high thermal conductivity elements 401 to the basin insulator, while ensuring its insulation performance.

[0030] Each umbrella-shaped structural unit comprises multiple layers of umbrella skirts. This design aims to address the issue that the insulation performance of high thermal conductivity materials is inferior to that of basin-type insulator materials, particularly at the interface between the two materials. By employing multiple layers of umbrella skirts in the umbrella-shaped structure, the surface distance is increased, thereby improving the insulation and withstand voltage performance at the interface. Furthermore, the diameter of the umbrella skirts in each umbrella-shaped structural unit 701 gradually increases or decreases along the axial direction of the heat-conducting rod. This gradual change in diameter increases the surface area of ​​the outer surface of the umbrella skirts, further enhancing the insulation and withstand voltage performance at the interface between the two materials.

[0031] In addition, the umbrella-shaped structural units 701 in the adjacent high thermal conductivity elements 401 are staggered. This is because the high thermal conductivity material may not be as good as the original pot insulator material in terms of insulation withstand voltage and mechanical strength. By staggering the umbrella-shaped structural units 701, the mechanical and stress resistance strength of the pot insulator can be enhanced.

[0032] Regarding the specific structure of other components in the basin insulator 201, the outer heat-conducting ring 301 is a circular ring with the same thickness as the basin insulator 201, covering the basin insulator insulation structure 302 from the outside, and is coaxial with the basin insulator insulation structure 302; the inner side of the outer heat-conducting ring 301 has circular holes and grooves with the same number as the high thermal conductivity elements 401, for fixed connection of the high thermal conductivity elements 401; the outer heat-conducting ring 301 is made of insulating material.

[0033] Combination Figure 1 , Figure 4 As shown, the intermediate conductive structure 303 is in the shape of a ring and has the same thickness as the basin insulator 201. The intermediate conductive structure 303 is coaxial with the basin insulator insulation structure 302 and is embedded in its center. The outer side of the intermediate conductive structure 303 has circular holes and grooves with the same number as the high thermal conductivity elements 401 for fixed connection of the high thermal conductivity elements 401. The intermediate conductive structure 303 is made of conductive material.

[0034] The basin-type insulator insulation structure 302 is a planar insulating ring structure or an inclined insulating ring structure, and the hollow part inside matches the outer contour of the high thermal conductivity element 401; the axis of the high thermal conductivity element 401 coincides with or is parallel to the radial direction of the basin-type insulator insulation structure 302.

[0035] Based on the above, this solution also provides the following: Figure 7 The tank-type vacuum circuit breaker 601 shown includes a vacuum interrupter 202 and a tank body 501. The vacuum interrupter 202 is located inside the tank body 501 and includes a stationary conductive structure located at the middle of one side of the tank body 501 and a moving conductive structure located at the middle of the other side of the tank body. The stationary conductive structure includes a stationary side current-guiding support structure 102 and a stationary conductive rod 103. The moving conductive structure includes a moving conductive rod 106, a moving end cover plate 107 of the interrupter 202, and a moving side current-guiding support structure 108. The stationary conductive rod 103 is welded to the upper geometric center of the vacuum interrupter 202, and the moving conductive rod 106 is welded to the lower geometric center of the vacuum interrupter 202. A stationary contact 104 and a moving contact 105 are welded between the moving end conductive rod 103 and the moving end conductive rod 106. An inlet conductive rod 101 is also welded to one side of the stationary end conductive rod 103 through a stationary side current guiding support structure 102. An outlet conductive rod 109 is also welded to one side of the moving end conductive rod 106 through a moving side current guiding support structure 107. One basin-type insulator 201 is coaxially connected between the stationary side current guiding support structure 102 and the stationary end conductive rod 103, and the other basin-type insulator 201 is coaxially connected between the moving end cover plate 107 of the arc-extinguishing chamber and the moving side current guiding support structure 108. This allows the heat from the stationary end conductive structure and the moving end conductive structure to be transferred to the tank body 501, improving the heat dissipation effect.

[0036] This invention proposes a basin insulator design with distributed heat-conducting elements, without affecting the overall insulation structure design of the tank-type vacuum circuit breaker or the strength and insulation withstand voltage performance of the basin insulator. By adding high thermal conductivity elements arranged in a specific manner inside the basin insulator, the heat transfer capacity of the basin insulator is improved. This increases the heat transfer and heat dissipation path from the tank-type vacuum circuit breaker to the tank body, increases the heat conduction efficiency of the insulation support components of the tank-type vacuum circuit breaker, reduces the temperature rise at key locations in the vacuum interrupter, and thus improves the rated current carrying capacity of the circuit breaker.

[0037] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A pot-type insulator with distributed heat conducting elements, characterized in that: It is installed inside the tank-type vacuum circuit breaker to conduct heat from the heating end to the tank body, and includes: an outer heat-conducting ring, which is located on the outside of the basin insulator and is used to contact the tank body; An intermediate conductive structure is located in the middle of the basin-type insulator and is used to connect the heating end; A basin-type insulator insulation structure, wherein the basin-type insulator insulation structure is located between the intermediate conductive structure and the outer heat-conducting ring; A high thermal conductivity element array structure is located inside the basin-type insulator insulation structure and is used to conduct heat. The high thermal conductivity element array structure includes multiple high thermal conductivity elements, one end of which is connected to the intermediate conductive structure and the other end of which is connected to the outer thermal conductive ring.

2. The pot-type insulator of distributed heat-conductive elements according to claim 1, characterized in that: The high thermal conductivity elements are arranged in a ring, and each high thermal conductivity element includes a heat-conducting rod and multiple umbrella-shaped structural units. The multiple umbrella-shaped structural units are spaced apart and coaxially connected to the heat-conducting rod. The high thermal conductivity elements are solid or hollow structures. The high thermal conductivity elements are made of high thermal conductivity insulating material.

3. The pot-type insulator of distributed heat-conductive elements according to claim 2, characterized in that: Each of the umbrella-shaped structural units comprises multiple layers of umbrella skirts.

4. The basin-type insulator with distributed heat-conducting elements according to claim 3, characterized in that: The diameter of the umbrella-shaped structural unit gradually increases or decreases along the axial direction of the heat-conducting rod.

5. The basin-type insulator with a distributed heat-conducting element according to any one of claims 2-4, characterized in that: The diameter of the umbrella-shaped structural unit is 20%-80% of the thickness of the basin insulator; the length of the umbrella-shaped structural unit is 1%-20% of the diameter of the basin insulator; and the number of umbrellas contained in the umbrella-shaped structural unit is 2-10.

6. The basin-type insulator with a distributed heat-conducting element according to any one of claims 2-4, characterized in that: The umbrella-shaped structural units in adjacent high thermal conductivity elements are arranged in a staggered manner.

7. The basin-type insulator with distributed heat-conducting elements according to claim 1, characterized in that: The outer heat-conducting ring is a circular ring with the same thickness as the basin insulator, covering the basin insulator insulation structure from the outside and coaxial with the basin insulator insulation structure; the inner side of the outer heat-conducting ring has circular holes and grooves with the same number as the high thermal conductivity elements, for fixing and connecting the high thermal conductivity elements; the outer heat-conducting ring is made of insulating material.

8. The basin-type insulator with distributed heat-conducting elements according to claim 1, characterized in that: The intermediate conductive structure is ring-shaped and has the same thickness as the basin-type insulator. The intermediate conductive structure is coaxial with the basin-type insulator insulation structure. The outer side of the intermediate conductive structure has circular holes and grooves with the same number as the high thermal conductivity elements for fixed connection of the high thermal conductivity elements. The intermediate conductive structure is made of conductive material.

9. The basin-type insulator with distributed heat-conducting elements according to claim 1, characterized in that: The basin-type insulator has a planar or inclined ring-shaped insulating structure, and its hollow interior portion matches the outer contour of the high thermal conductivity element. The axis of the high thermal conductivity element coincides with or is parallel to the radial direction of the basin-type insulator.

10. A tank-type vacuum circuit breaker, comprising a vacuum interrupter and a tank body, wherein the vacuum interrupter is located within the tank body and includes a stationary conductive structure located at the middle position on one side of the tank body and a moving conductive structure located at the middle position on the other side of the tank body, characterized in that: The stationary conductive structure and the moving conductive structure are respectively equipped with a basin-type insulator with a distributed heat-conducting element as described in any one of claims 1-9, and are respectively in contact with the intermediate conductive structure of the basin-type insulator, and the outer heat-conducting ring of the basin-type insulator is in contact with the tank body.

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