Heat dissipation type solid-sealed polar pole

Abstract

The utility model relates to the technical field of vacuum switches, in particular to a heat dissipation type solid-sealed polar pole which comprises a vacuum arc-extinguishing chamber, an upper outgoing line, an insulating pull rod, a lower outgoing line electrically connected with a moving contact of the vacuum arc-extinguishing chamber through flexible connection, a resin shell and a heat dissipation mechanism used for cooling the vacuum arc-extinguishing chamber. The heat dissipation mechanism comprises an inner heat conduction ring arranged on the outer wall of the vacuum arc-extinguishing chamber in a sleeving mode, an outer heat conduction ring arranged on the outer wall of the resin shell in a sleeving mode, a plurality of heat conduction rods evenly distributed outside the vacuum arc-extinguishing chamber in the circumferential direction, a plurality of heat dissipation fins evenly distributed outside the resin shell in the circumferential direction and an insulating cylinder covering the heat dissipation fins in an annular mode, and the inner ends of the heat conduction rods are connected with the inner heat conduction ring. The outer end of the heat conduction rod penetrates through the resin shell to be connected with the outer heat conduction ring, the insulating cylinder is a conical cylinder with two open ends, one vertical edge of the cooling fin is connected with the outer wall of the resin shell, and the other vertical edge of the cooling fin is connected with the inner wall of the insulating cylinder. According to the scheme, the cooling rate of the vacuum arc-extinguishing chamber can be accelerated, and the service life of the solid-sealed polar pole is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum switches, in particular to a heat dissipation type solid-sealed pole. Background Art

[0002] The sealed pole is the main component used in the sealed circuit breaker for interrupting medium and high voltage currents. It is a method of embedding the vacuum interrupter and the conductive parts related to the circuit breaker into a solid insulating material that is easy to solidify, such as epoxy resin or thermoplastic material. After the insulating material is solidified, an independent integral component is formed. The vacuum interrupter will generate a large amount of heat during operation, and the outer layer of the sealed pole is insulating resin, which causes the vacuum interrupter to dissipate heat slowly, causing the various devices in the vacuum interrupter to be in a high temperature state for a long time. These devices are prone to fatigue failure, which reduces the service life of the sealed pole. The existing sealed pole only dissipates heat naturally by arranging heat sinks on the outer wall of the resin shell, and the heat dissipation rate is slow. Therefore, it is necessary to propose a sealed pole with rapid heat dissipation capability. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a heat-dissipating solid-sealed pole to solve the problem that the heat dissipation efficiency of the existing solid-sealed pole is slow, resulting in a reduced service life of the solid-sealed pole.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a heat dissipation type sealed pole, comprising a vacuum interrupter, an upper outlet connected to the static contact of the vacuum interrupter, an insulating pull rod fixedly connected to the moving contact of the vacuum interrupter, a lower outlet electrically connected to the moving contact of the vacuum interrupter through a soft connection, a resin shell covering the vacuum interrupter, the upper outlet and the lower outlet, and a heat dissipation mechanism for cooling the vacuum interrupter, the heat dissipation mechanism comprising an inner heat-conducting ring sleeved on the outer wall of the vacuum interrupter, a heat-conducting ring sleeved on the outer wall of the resin shell, and a heat-conducting ring sleeved on the outer wall of the resin shell. An outer heat-conducting ring, a plurality of heat-conducting rods uniformly distributed outside the vacuum interrupter, a plurality of heat sinks uniformly distributed outside the resin shell, and an insulating tube covering the plurality of heat sinks, the inner ends of the heat-conducting rods are connected to the inner heat-conducting ring, the outer ends of the heat-conducting rods pass through the resin shell and are connected to the outer heat-conducting ring, the insulating tube is a conical tube with two ends open, a gap is left between the insulating tube and the resin shell, the heat sink is arranged in the gap, one vertical side of the heat sink is connected to the outer wall of the resin shell, the other vertical side of the heat sink is connected to the inner wall of the insulating tube, and the outer heat-conducting ring is connected to the heat sink.

[0005] In the above scheme, the heat of the vacuum interrupter is quickly transferred to the heat sink outside the resin shell through the inner heat-conducting ring, the heat-conducting rod and the outer heat-conducting ring. The conical insulating tube forms a chimney effect, so that the air in the insulating tube flows upward to take away the heat from the heat sink, thereby ultimately achieving the purpose of accelerating the cooling rate of the vacuum interrupter.

[0006] Furthermore, an exhaust fan is provided at the upper port of the insulating cylinder, and the exhaust fan is connected to an external power supply.

[0007] Furthermore, a temperature sensor is provided on the outer wall of the resin shell, and a controller for controlling the operation of the exhaust fan is provided on the exhaust fan, and the temperature sensor is electrically connected to the controller.

[0008] When the temperature generated by the vacuum interrupter is high, resulting in a high temperature in the resin shell, the sensor controls the exhaust fan to generate a high-speed airflow between the insulating tube and the resin shell to further increase the cooling rate of the heat sink, thereby achieving the purpose of forced air cooling of the heat sink.

[0009] Furthermore, a heat dissipation ring is protruded from the resin shell outside the insulating pull rod, and the heat dissipation ring is integrally formed with the resin shell.

[0010] Furthermore, the inner heat-conducting ring and the outer heat-conducting ring are both circular cylinders made of copper sheets.

[0011] Furthermore, the heat sink is a sheet made of aluminum.

[0012] Furthermore, the flexible connection is a copper stranded wire.

[0013] Furthermore, a thermally conductive silicone grease layer is provided between the inner wall of the inner heat-conducting ring and the outer wall of the vacuum interrupter chamber.

[0014] Compared with the existing natural air cooling method using only heat sinks, this solution has at least the following beneficial effects:

[0015] 1. The heat of the vacuum interrupter is quickly transferred to the heat sink outside the resin shell through the inner heat conduction ring, the heat conduction rod and the outer heat conduction ring. The conical insulating tube forms a chimney effect, so that the air in the insulating tube flows upward to take away the heat from the heat sink, thereby ultimately achieving the purpose of accelerating the cooling rate of the vacuum interrupter.

[0016] 2. When the temperature generated by the vacuum interrupter is high and causes the temperature of the resin shell to be high, the sensor detects that the temperature exceeds the preset value and then sends a signal to the controller to operate the exhaust fan to generate high-speed airflow between the insulating tube and the resin shell to further increase the cooling rate of the heat sink, so as to achieve the purpose of forced air cooling of the heat sink.

[0017] 3. Since the heat sink is covered by an insulating tube, there is no need to coat the heat sink with an insulating layer, which further improves the heat dissipation rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 This is a schematic structural diagram of a heat dissipation type solid-sealed pole according to the utility model in the main view direction.

[0020] Figure 2 for Figure 1 Middle AA section view.

[0021] The meanings of the reference numerals in the accompanying drawings are:

[0022] Resin housing-10; vacuum interrupter-11; upper outlet-12; insulating pull rod-13; flexible connector-14; lower outlet-15;

[0023] Inner heat conducting ring-20; outer heat conducting ring-21; heat conducting rod-22; heat sink-23; insulation tube-24; exhaust fan-25; temperature sensor-26;

[0024] Heat dissipation ring 30. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] The utility model provides a heat dissipation type solid sealed pole, such as Figure 1-Figure 2As shown, it includes a vacuum interrupter 11, an upper outlet line 12 arranged at the upper end of the vacuum interrupter 11 and connected to the static contact at the upper end of the vacuum interrupter 11, an insulating pull rod 13 vertically arranged below the vacuum interrupter 11 and fixedly connected to the moving contact at the lower end of the vacuum interrupter 11, a lower outlet line 15 electrically connected to the moving contact of the vacuum interrupter 11 through a soft connection 14, a resin shell 10 covering the vacuum interrupter 11, the upper outlet line 12 and the lower outlet line 15, and a heat dissipation mechanism for cooling the vacuum interrupter 11.

[0029] The vacuum interrupter 11 is also called a vacuum switch tube, which belongs to a mature existing technology and will not be described in detail here. The resin shell 10 tightly covers the vacuum interrupter 11, the upper outlet 12 and the lower outlet 15 and extends downward to form a ring cover on the outside of the insulating pull rod 13 set in resin. The gap between the resin insulating tube 24 and the outer wall of the insulating pull rod 13 is set to allow the insulating pull rod 13 to move in the resin shell 10. A heat dissipation ring 30 is protruded on the outer wall of the resin shell 10 outside the insulating pull rod 13. The heat dissipation ring 30 is integrally formed with the resin shell 10. The lower outlet 15 is set at the connection between the insulating pull rod 13 and the vacuum interrupter 11. The lower outlet 15 is connected to the moving contact of the vacuum interrupter 11 through a soft connection 14 made of copper stranded wire.

[0030] The heat dissipation mechanism includes an inner heat-conducting ring 20 sleeved on the outer wall of the vacuum interrupter 11, an outer heat-conducting ring 21 sleeved on the outer wall of the resin shell 10, a plurality of heat-conducting rods 22 uniformly distributed circumferentially outside the vacuum interrupter 11, a plurality of heat-dissipating fins 23 uniformly distributed circumferentially outside the resin shell 10, and an insulating tube 24 for encircling the plurality of heat-dissipating fins 23. The inner heat-conducting ring 20 and the outer heat-conducting ring 21 are both circular cylinders made of copper sheets. A thermal grease layer is provided between the inner wall of the inner heat-conducting ring 20 and the outer wall of the vacuum interrupter 11. To facilitate the installation of the outer heat-conducting ring 21, the outer heat-conducting ring 21 is tightly clamped on the outer wall of the resin shell 10 in the form of a hoop. In this embodiment, a total of 6 6 heat-conducting rods 22 are evenly distributed around the outer edge of the vacuum interrupter 11. In other feasible embodiments, other numbers of heat-conducting rods 22 can be set. No more examples are given here. The inner end of the heat-conducting rod 22 is in contact with the inner heat-conducting ring 20, and the outer end of the heat-conducting rod 22 is in contact with the outer heat-conducting ring 21 after passing through the resin shell 10. The heat rod 22 is sealed and fixedly connected to the resin shell 10. Thermal grease can be applied to both ends of the heat-conducting rod 22 to increase the heat transfer efficiency between the heat-conducting rod 22 and the outer heat-conducting ring 21 and the inner heat-conducting ring 20. The insulating tube 24 is a tapered tube with openings at both ends. The upper port of the insulating tube 24 is provided with an exhaust fan 25. The fan 25 is fixedly connected to the inner wall of the insulating cylinder 24, and the exhaust fan 25 can be fixedly connected to the insulating cylinder 24 by screws. The exhaust fan 25 is connected to an external power supply. The exhaust fan 25 is provided with a controller for controlling the operation of the exhaust fan 25. A temperature sensor 26 for detecting the temperature of the resin shell 10 is provided on the outer wall of the resin shell 10. The temperature sensor 26 is electrically connected to the controller. A through hole is left on the insulating cylinder 24 to cooperate with the resin shell covered on the outside of the upper outlet 12. A gap is left between the insulating cylinder 24 and the resin shell 10. A sheet-shaped heat sink 23 made of aluminum is provided at the gap. In this embodiment, a total of 12 heat sinks 23 are provided. In other feasible In the embodiment, other numbers of heat sinks can be provided, and examples are not given one by one here. The 12 heat sinks 23 in this embodiment are evenly distributed circumferentially around the outer edge of the vacuum arc chamber 11, and a plurality of vertical grooves corresponding to the heat sinks 23 are vertically provided on the outer wall of the resin shell 10. One vertical side of the heat sink 23 is inserted into the vertical groove, and a groove is recessed on the vertical side of the heat sink 23 close to the resin shell 10 to cooperate with the outer heat conducting ring 21. The outer heat conducting ring 21 is inserted into the groove of the heat conducting ring 21 and is in close contact with the heat sink 23. The other vertical side of the heat sink 23 is fixedly connected to the inner wall of the insulating tube 24 by bonding. In order to facilitate the installation of the insulating tube 24, the insulating tube 24 can adopt a clamp structure.

[0031] In the present invention, the heat of the vacuum interrupter 11 is quickly transferred to the heat sink 23 outside the resin shell 10 through the inner heat-conducting ring 20, the heat-conducting rod 22 and the outer heat-conducting ring 21. The conical insulating tube 24 forms a chimney effect to accelerate the upward flow of air in the insulating tube 24 to take away the heat on the heat sink 23, so as to ultimately achieve the purpose of accelerating the cooling rate of the vacuum interrupter 11; when the temperature generated by the vacuum interrupter 11 is high and the temperature of the resin shell 10 is high, the temperature sensor 26 detects that the temperature exceeds the preset value and then sends a signal to the controller to operate the exhaust fan 25 to generate a high-speed airflow between the insulating tube 24 and the resin shell 10 to further increase the cooling rate of the heat sink 23, so as to achieve the purpose of forced air cooling of the heat sink 23 to quickly cool the vacuum interrupter 11.

[0032] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A heat dissipation sealed pole, comprising a vacuum interrupter, an upper outlet connected to a static contact of the vacuum interrupter, an insulating pull rod fixedly connected to a moving contact of the vacuum interrupter, a lower outlet electrically connected to the moving contact of the vacuum interrupter via a flexible connection, and a resin housing covering the vacuum interrupter, the upper outlet, and the lower outlet, characterized in that: The heat dissipation mechanism further comprises an inner heat-conducting ring sleeved on the outer wall of the vacuum interrupter, an outer heat-conducting ring sleeved on the outer wall of the resin shell, a plurality of heat-conducting rods uniformly distributed circumferentially outside the vacuum interrupter, a plurality of heat-dissipating fins uniformly distributed circumferentially outside the resin shell, and an insulating tube covering the plurality of heat-dissipating fins, the inner end of the heat-conducting rod is connected to the inner heat-conducting ring, the outer end of the heat-conducting rod passes through the resin shell and is connected to the outer heat-conducting ring, the insulating tube is a conical tube with two ends open, and a gap is left between the insulating tube and the resin shell, the heat-dissipating fin is arranged in the gap, one vertical side of the heat-dissipating fin is connected to the outer wall of the resin shell, the other vertical side of the heat-dissipating fin is connected to the inner wall of the insulating tube, and the outer heat-conducting ring is connected to the heat-dissipating fin.

2. The heat dissipation type sealed pole according to claim 1, characterized in that: An exhaust fan is provided at the upper end of the insulating cylinder, and the exhaust fan is externally connected to a power supply.

3. The heat dissipation type sealed pole according to claim 2, characterized in that: A temperature sensor is provided on the outer wall of the resin housing, and a controller for controlling the operation of the exhaust fan is provided on the exhaust fan, and the temperature sensor is electrically connected to the controller.

4. The heat dissipation type sealed pole according to claim 1, characterized in that: A heat dissipation ring is protruded on the resin shell outside the insulating pull rod, and the heat dissipation ring is integrally formed with the resin shell.

5. The heat dissipation type sealed pole according to claim 1, characterized in that: The inner heat-conducting ring and the outer heat-conducting ring are both circular cylinders made of copper sheets.

6. The heat dissipation type sealed pole according to claim 1, characterized in that: The heat sink is made of aluminum.

7. The heat dissipation type sealed pole according to claim 1, characterized in that: The flexible connection is a copper stranded wire.

8. The heat dissipation type sealed pole according to claim 1, characterized in that: A thermal conductive silicone grease layer is provided between the inner wall of the inner heat conductive ring and the outer wall of the vacuum interrupter.

Images