Insulation heat pipe radiator and gas insulation switch equipment

Abstract

The invention relates to the technical field of switch equipment, in particular to an insulation heat pipe radiator and gas insulation switch equipment. The insulation heat pipe radiator comprises an insulation heat pipe, an insulation phase change medium is arranged in an inner cavity of the insulation heat pipe, the insulation heat pipe comprises an evaporation section, a condensation section and an insulation section connected between the evaporation section and the condensation section, and the end, away from the insulation section, of the evaporation section is of a sealing structure. The end, away from the insulation section, of the condensation section is communicated with the condensation cavity, and the condenser is used for being arranged outside the switch shell. The heat of the heating component is transferred to the evaporation section, the insulating phase change medium absorbs the heat at the evaporation section, converts the heat into a gas state, rises to the condensation section, continuously rises into the condenser and exchanges heat with the external environment, the heat transfer efficiency of the internal heating component and the external environment can be greatly improved, and therefore the heat dissipation performance of the switch equipment is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of switchgear, and in particular to an insulated heat pipe radiator and a gas insulated switchgear. Background Art

[0002] The gas-insulated switchgear seals the main conductive circuit in a stainless steel or aluminum casing, which is isolated from the outside air. The current passing through the main conductor of the large-current switch can generally reach thousands of amperes, and the current of the generator output switch can reach tens of thousands of amperes. Due to the resistance loss and ferromagnetic loss of the equipment, the heating power of the main conductor can reach the KW level. The main conductor and the casing are insulated by insulating gas. Some insulating mechanical supports will also be added according to structural requirements, but the insulating support generally uses conventional insulating materials such as epoxy resin and plastic. The thermal conductivity of conventional insulating materials is very low and basically has no effect on heat transfer. The gas in the closed compartment does not circulate with the outside world, and the thermal conductivity of the gas is even lower. The heat of the main conductor is mainly transferred to the metal casing through thermal radiation and the very low speed of natural thermal convection of the internal gas, and then transferred to the external environment through the casing. The overall heat transfer efficiency of the system is very low, resulting in a high temperature rise in the main conductive circuit. In severe cases, accidents may occur and affect the life of the equipment. Therefore, in the field of large-current gas-insulated switches, how to quickly dissipate the internal heat is a problem that needs to be solved.

[0003] In order to reduce the temperature rise of the gas insulated switchgear, the prior art generally adopts the methods of increasing the conductor cross-sectional area to reduce the heat generation, adding heat sinks or fans, etc., but the above methods do not change the heat transfer mode of the internal gas to the outside, and the effect is not good or the cost is very high. The Chinese invention patent application document with application publication number CN115752046A discloses an insulated heat pipe and a switch cabinet using the insulated heat pipe, wherein the insulated heat pipe is arranged in a closed chamber of the switch cabinet as a whole, and the insulated heat pipe includes a heat absorption section (i.e., an evaporation section), a heat release section (i.e., a condensation section), and an insulating section connected therebetween, and an insulating phase change medium is provided in the inner cavity of the insulated heat pipe, the heat absorption section and the heat release section are metal sections, and the insulating section is a rigid tube, the heat absorption section contacts the main conductor in the closed chamber, and the heat release section contacts the cavity wall of the closed chamber, and the heat of the main conductor is transferred to the heat absorption section, and the insulating phase change medium absorbs heat at the heat absorption section and is converted into a gas state and rises to the heat release section, and then releases heat at the heat release section and is converted into a liquid state, and flows back to the heat absorption section. The existing switch cabinet sets the insulated heat pipe as a whole in a closed chamber, and mainly relies on the contact between the heat release section of the insulated heat pipe and the cavity wall of the closed chamber to accelerate the heat dissipation. However, the heat release section is not in direct contact with the external environment. Therefore, this method only enhances the heat transfer efficiency between the main circuit heating conductor and the cavity wall of the switch device, and the contact area between the heat release section and the cavity wall is limited, and the heat dissipation effect is still poor. Summary of the invention

[0004] The object of the present invention is to provide an insulated heat pipe radiator to solve the problem that the existing insulated heat pipe has poor heat dissipation effect on gas insulated switchgear; the object of the present invention is also to provide a gas insulated switchgear to solve the problem that the existing gas insulated switchgear has poor heat dissipation performance.

[0005] The insulated heat pipe radiator of the present invention adopts the following technical solution: An insulated heat pipe radiator includes an insulated heat pipe, the inner cavity of the insulated heat pipe has an insulating phase change medium, the insulated heat pipe includes an evaporation section, a condensation section and an insulating section connected therebetween, one end of the evaporation section away from the insulating section is a sealed structure, the insulated heat pipe radiator also includes a condenser, the condenser has a condensation cavity, one end of the condensation section away from the insulating section is connected to the condensation cavity, and the condenser is used to be arranged outside a switch housing.

[0006] Furthermore, the condenser includes an upper condensation box, a lower condensation box and a condenser heat pipe connected between the upper and lower condensation boxes. The inner cavity of the upper condensation box, the inner cavity of the lower condensation box and the inner cavity of the condenser heat pipe together constitute the condensation chamber. A connecting hole is provided on the box body of the lower condensation box, and one end of the condensation section away from the insulating section is connected to the connecting hole and communicates with the condensation chamber.

[0007] Furthermore, there are more than two condenser heat pipes, and each condenser heat pipe is independent of each other.

[0008] Furthermore, all condenser heat pipes are arranged in a matrix.

[0009] Furthermore, heat dissipation fins are provided on the outer peripheral surface of the condenser heat pipe.

[0010] Furthermore, the insulating section includes an insulating main section, both ends of which are connected with joints, the joints at both ends are respectively connected to the evaporation section and the condensation section, and a shielding member is provided at the connection position between the joint connected to the evaporation section and the insulating main section.

[0011] Furthermore, a shielding member is also provided at the connection portion between the joint connected to the condensation section and the insulating main body section.

[0012] Furthermore, the insulating main body section is a ceramic tube, the joints at both ends are metal joints, and the shielding component is welded together with the ceramic tube and the metal joints.

[0013] Beneficial effects: The present invention is an improved invention. The evaporation section of the insulated heat pipe is used to contact the heat-generating components inside the switch housing, so that the heat of the heat-generating components is transferred to the evaporation section. The insulating phase-change medium absorbs heat at the evaporation section and is converted into gas and rises to the condensation section. Since the condensation section is connected to the condensation chamber of the condenser, the gaseous insulating phase-change medium will continue to rise into the condenser after rising to the condensation section. Since the condenser is used to be arranged outside the switch housing and has good heat transfer with the external environment, the gaseous insulating phase-change medium will accelerate the heat exchange with the external environment after rising to the condenser, complete the heat release faster, and then convert into liquid and flow back to the evaporation section. The insulated heat pipe is used in conjunction with the condenser arranged outside the switch housing. Compared with the structure in the prior art in which the insulated heat pipe is arranged as a whole inside the switch housing, it can greatly accelerate the heat transfer efficiency between the internal heat-generating components and the external environment, thereby greatly improving the heat dissipation performance of the switch device.

[0014] The gas insulated switchgear of the present invention adopts the following technical solution: The gas insulated switchgear comprises a switch housing, a main conductive circuit is arranged inside the switch housing, and an insulated heat pipe radiator, the insulated heat pipe radiator comprises an insulated heat pipe, an inner cavity of the insulated heat pipe comprises an insulating phase change medium, the insulated heat pipe comprises an evaporation section, a condensation section and an insulating section connected therebetween, an end of the evaporation section away from the insulating section is a sealed structure, the insulated heat pipe radiator also comprises a condenser, the condenser has a condensation cavity, an end of the condensation section away from the insulating section is connected to the condensation cavity, the condenser is arranged outside the switch housing, the evaporation section is in direct or indirect contact with the heat-generating components of the main conductive circuit for heat transfer, and the condensation section extends out of the switch housing and is connected to the condenser.

[0015] Furthermore, the condenser includes an upper condensation box, a lower condensation box and a condenser heat pipe connected between the upper and lower condensation boxes. The inner cavity of the upper condensation box, the inner cavity of the lower condensation box and the inner cavity of the condenser heat pipe together constitute the condensation chamber. A connecting hole is provided on the box body of the lower condensation box, and one end of the condensation section away from the insulating section is connected to the connecting hole and communicates with the condensation chamber.

[0016] Furthermore, there are more than two condenser heat pipes, and each condenser heat pipe is independent of each other.

[0017] Furthermore, all condenser heat pipes are arranged in a matrix.

[0018] Furthermore, heat dissipation fins are provided on the outer peripheral surface of the condenser heat pipe.

[0019] Furthermore, the insulating section includes an insulating main section, both ends of which are connected with joints, the joints at both ends are respectively connected to the evaporation section and the condensation section, and a shielding member is provided at the connection position between the joint connected to the evaporation section and the insulating main section.

[0020] Furthermore, a shielding member is also provided at the connection portion between the joint connected to the condensation section and the insulating main body section.

[0021] Furthermore, the insulating main body section is a ceramic tube, the joints at both ends are metal joints, and the shielding component is welded together with the ceramic tube and the metal joints.

[0022] Furthermore, a mounting groove is provided on the heating component of the main conductive circuit, a clamp type flange is installed in the mounting groove, and the end of the evaporation section away from the insulating section is in indirect contact with the heating component of the main conductive circuit for heat transfer through the clamp type flange.

[0023] Beneficial effects: The present invention is an improved invention. The evaporation section of the insulated heat pipe is in direct or indirect contact with the heat-generating components of the main conductive circuit inside the switch housing, so that the heat of the heat-generating components is transferred to the evaporation section. The insulating phase-change medium absorbs heat at the evaporation section and is converted into gas and rises to the condensation section. Since the condensation section is connected to the condensation chamber of the condenser, the gaseous insulating phase-change medium will continue to rise into the condenser after rising to the condensation section. Since the condenser is arranged outside the switch housing and has good heat transfer with the external environment, the gaseous insulating phase-change medium will accelerate the heat exchange with the external environment after rising to the condenser, complete the heat release faster, and then convert into liquid and flow back to the evaporation section. The insulated heat pipe is used in conjunction with the condenser arranged outside the switch housing. Compared with the structure in the prior art in which the insulated heat pipe is arranged as a whole inside the switch housing, it can greatly accelerate the heat transfer efficiency between the internal heat-generating components and the external environment, thereby greatly improving the heat dissipation performance of the switch device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the internal structure of the gas insulated switchgear of the present invention; Figure 2 It is a structural schematic diagram of an insulated heat pipe radiator; Figure 3 is a side view of an insulated heat pipe radiator; Figure 4 is a schematic diagram of the structure of the condenser; Figure 5 is the front view of the condenser; Figure 6 It is a schematic structural diagram of an insulating section of an insulated heat pipe; Figure 7 is a front view of an insulating section of an insulated heat pipe; In the figure: 1. condenser; 101. upper condenser box; 102. condenser heat pipe; 103. heat dissipation fin; 104. lower condenser box; 105. connection hole; 2. insulated heat pipe; 201. fixed flange; 202. condensation section; 203. insulation section; 204. evaporation section; 205. insulating phase change medium; 206. insulating main body section; 207. joint; 208. shielding member; 209. slot; 301. switch housing; 302. three-position middle contact; 303. static contact seat; 304. overlapping row; 305. vacuum arc extinguishing chamber; 306. clamping flange; 307. sealing ring. DETAILED DESCRIPTION

[0025] In the prior art, the insulated heat pipe is arranged as a whole inside the closed chamber of the switch device, and the heat release section is not in direct contact with the external environment, so the heat dissipation effect of the switch device is still poor. The present invention can improve the heat dissipation performance of the switch device. The basic concept of the present invention is: the insulated heat pipe is used in conjunction with a condenser, and the condenser is arranged outside the switch device, and has good heat transfer with the external environment, so that the insulating phase change medium converted into gas after absorbing heat can quickly release heat at the condenser, complete the rapid heat exchange with the external environment, thereby accelerating the heat transfer efficiency between the internal heating components of the switch device and the external environment, and improving the heat dissipation performance of the switch device.

[0026] Based on the above inventive concept, the embodiments of the present invention are described in detail below.

[0027] Embodiments of the gas insulated switchgear of the present invention: like Figure 1 As shown, the gas-insulated switchgear includes a switch housing 301, and a main conductive circuit is arranged inside the switch housing 301. The main conductive circuit includes components such as a three-position intermediate contact 302, a static contact seat 303, a lap bar 304, and a vacuum arc extinguishing chamber 305. A large current flows through the main circuit conductor, which is the main heat source of the switchgear. The switch housing 301 is filled with insulating gas and isolated from the external environment to play an insulating protection role. The gas-insulated switchgear also includes an insulating heat pipe radiator, which includes a part inside the switch housing 301 and a part outside the switch housing 301. The part inside the switch housing 301 contacts the static contact seat 303 of the main conductive circuit for heat transfer, and transfers heat to the part outside the switch housing 301, and performs rapid heat exchange with the external environment, thereby accelerating the heat transfer efficiency between the main conductive circuit inside the switchgear and the external environment, and improving the heat dissipation performance of the switchgear. In this embodiment, the switchgear is provided with two insulating heat pipe radiators, and the two insulating heat pipe radiators are independent of each other. It is understandable that the number and arrangement positions of the insulated heat pipe radiators are adjusted according to the actual internal space of the switchgear and the heat dissipation requirements, and are not limited.

[0028] The structure of the insulated heat pipe radiator is introduced in detail below.

[0029] like Figure 2-3 As shown, two insulated heat pipe radiators are arranged side by side and are independent of each other. The insulated heat pipe radiator includes an insulated heat pipe 2 and a condenser 1, one end of the insulated heat pipe 2 is sealed, and the other end is open, and the open end is connected to the condenser 1. The inner cavity of the insulated heat pipe 2 is filled with an insulating phase change medium 205, and the insulated heat pipe 2 includes an evaporation section 204, a condensation section 202, and an insulating section 203 connected therebetween, and the two connected sections are welded, wherein the end of the evaporation section 204 away from the insulating section 203 is a sealed structure, and the end of the condensation section 202 away from the insulating section 203 is an open structure. The condenser 1 has a condensation chamber, and the end of the condensation section 202 away from the insulating section 203 is connected to the condensation chamber. The inner cavity of the insulated heat pipe 2 is connected to the condensation chamber of the condenser 1 to form a closed chamber, and the insulating phase change medium 205 can flow in the closed chamber. The condenser 1 is used to be arranged outside the switch housing 301, the condensing section 202 of the insulated heat pipe 2 extends out of the switch housing 301 and is connected to the condenser 1, and the evaporating section 204 is used to directly or indirectly contact and transfer heat with the heating components of the main conductive circuit. A fixing flange 201 is welded at the end of the condensing section 202 for fixing the insulated heat pipe radiator on the switch device.

[0030] The structure of the condenser can refer to Figure 4-5 , including an upper condenser box 101, a lower condenser box 104, and a condenser heat pipe 102 connected between the upper and lower condenser boxes. The box bottom plate of the upper condenser box 101 and the box top plate of the lower condenser box 104 are provided with corresponding circular holes for connecting the condenser heat pipe 102. The inner cavity of the upper condenser box 101, the inner cavity of the lower condenser box 104, and the inner cavity of the condenser heat pipe 102 together constitute a condensation chamber. The box bottom plate of the lower condenser box 104 is provided with a connection hole 105, and there are three connection holes 105, which are used to dock the condensation section 202 of the three-phase insulated heat pipe 2. The condensation section 202 is docked at the connection hole 105 and connected to the condensation chamber. The insulating phase change medium 205 that is converted into a gaseous state after absorbing heat in the insulated heat pipe 2 can continue to rise to the condenser 1 after rising to the condensation section 202. The condenser 1 has good heat transfer with the external environment, thereby accelerating the heat exchange process between the gaseous insulating phase change medium 205 and the external environment, and accelerating heat dissipation.

[0031] In order to improve the heat dissipation efficiency, the condenser 1 is provided with a plurality of condenser heat pipes 102, and each condenser heat pipe 102 is independent of each other. For example, in this embodiment, the condenser heat pipes 102 are provided with a plurality of rows, and each row is provided with a plurality of condenser heat pipes 102. By increasing the number of condenser heat pipes 102, the heat exchange area is increased, the heat dissipation of the gaseous insulating phase change medium 205 at the condenser 1 is accelerated, and the heat dissipation efficiency is improved, thereby effectively reducing the temperature rise of the equipment. All condenser heat pipes 102 are arranged in a matrix. First, there is a suitable spacing between any two adjacent condenser heat pipes 102, which is conducive to accelerating heat dissipation; second, the overall structural layout of the condenser 1 is made more regular and compact, which is convenient for its installation outside the switch device. In order to further improve the heat dissipation efficiency, heat dissipation fins 103 are also provided on the outer peripheral surface of each condenser heat pipe 102 to further increase the heat dissipation area and accelerate the heat dissipation speed.

[0032] The evaporation section 204 and the condensation section 202 of the insulated heat pipe 2 are both metal sections. The evaporation section 204 contacts the heating conductor of the main conductive circuit for heat transfer. The high voltage of the main conductive circuit is transmitted to the evaporation section 204. The condensation section 202 extends out of the switch housing 301 and is connected to the condenser 1. The condensation section 202 is sealed with the switch housing 301 at the position where it passes through the switch housing 301. The condensation section 202 and the switch housing 301 are both grounded. The insulation section 203 is connected between the evaporation section 204 and the condensation section 202 to insulate and separate the evaporation section 204 from the condensation section 202. Both the evaporation section 204 and the condensation section 202 are metal sections with good thermal conductivity, which improves the heat dissipation performance of the entire insulated heat pipe 2. The main part of the insulation section 203 is made of high thermal conductivity ceramic material, which has good high temperature resistance and prolongs the service life of the entire insulated heat pipe 2. Both the evaporation section 204 and the condensation section 202 are metal sections, which can be bent according to the installation space and layout position requirements under actual working conditions. The insulating section 203 is a rigid section and cannot be bent.

[0033] The structure of the insulating section 203 can be referred to Figure 6-7, including an insulating main body section 206, with joints 207 connected to both ends of the insulating main body section 206, respectively. The joints 207 at both ends are used to connect to the evaporation section 204 and the condensation section 202, respectively. The connecting parts of the two end joints 207 and the insulating main body section 206 are provided with shielding members 208 to shield the connecting parts of the two end joints 207 and the insulating main body section 206, so as to avoid discharge at the connecting parts and affect the insulation performance of the equipment. The shielding member 208 is specifically a shielding ring, and the outer peripheral surface of the shielding ring is a smooth curved surface without sharp edges and corners, which fully guarantees the shielding effect. The insulating main body section 206 is a ceramic tube, and the two end joints 207 are metal joints, specifically copper tube joints. The shielding member 208 is welded together with the insulating main body section 206 and the corresponding end joints 207, and the shielding member 208 shields the weld to avoid discharge at the weld. A plurality of slots 209 are provided on the outer peripheral surface of the ceramic tube along its axial direction to increase the creepage distance.

[0034] Insulated heat pipe radiators are used in switchgear, such as Figure 1 As shown, the insulated heat pipe 2 is arranged inside the switch device, the end of the condensation section 202 of the insulated heat pipe 2 extends out of the switch housing 301 and is connected to the condenser 1, and the evaporation section 204 of the insulated heat pipe 2 is in contact with the static contact seat 303 of the main conductive circuit inside the switch device for heat transfer. Specifically, a mounting groove is provided on the static contact seat 303, and a clamping flange 306 is installed in the mounting groove. The end of the evaporation section 204 away from the insulating section 203 is in indirect contact with the static contact seat 303 through the clamping flange 306 for heat transfer, thereby increasing the heat transfer contact area between the evaporation section 204 and the heat-generating component, which can accelerate heat transfer. A fixed flange 201 is welded at the end of the condensation section 202, and the fixing on the switch device is achieved through the fixed flange 201. A sealing ring 307 is provided at the connection between the fixed flange 201 and the switch housing 301 to prevent air leakage.

[0035] The heat generated by the main conductive circuit inside the switchgear is transferred to the evaporation section 204 of the insulating heat pipe 2. The liquid insulating phase change medium 205 absorbs heat at the evaporation section 204 and is converted into gas and rises to the condensation section 202 and continues to rise to the condenser 1. The heat is dissipated to the surrounding environment through the condenser 1, thereby reducing the temperature rise inside the switchgear. Since the condenser 1 is arranged outside the switchgear and has good heat transfer with the external environment, it can speed up the heat dissipation efficiency, thereby greatly improving the heat dissipation performance of the switchgear.

[0036] Of course, the present invention is not limited to the implementation methods in the above embodiments.

[0037] For example, in other embodiments, the condenser may also be provided with only one condenser heat pipe, in which case the size of the condenser heat pipe may be larger to increase the heat dissipation area. The number of condenser heat pipes may be flexibly changed without restriction. When there are multiple condenser heat pipes, the arrangement of all condenser heat pipes may also vary, such as being arranged in multiple concentric circles or in a rectangular arrangement. The condenser heat pipe may not be provided with heat dissipation fins, and of course, fans and other components may be provided near the condenser to accelerate air flow. In other embodiments, other existing condensers may also be used.

[0038] For example, in other embodiments, a shielding member may be provided only at the connection position between the joint connected to the evaporation section and the insulating main section, and no shielding member may be provided at the connection position between the other end joint and the insulating main section, because the other end joint is connected to the condensation section, and the condensation section is grounded. The place where discharge may occur is mainly the connection position between the joint connected to the evaporation section and the insulating main section, so a shielding member is provided at this connection position.

[0039] For example, in other embodiments, the insulating main section of the insulating section is an epoxy resin tube, and connectors are fixedly connected at both ends of the epoxy resin tube. The connectors can be cast as one with the epoxy resin tube by casting, and the connectors at both ends are threadedly connected to the condensation section and the evaporation section respectively.

[0040] For example, in other embodiments, a fixed flange can be welded at the end of the evaporation section away from the insulating section. The fixed flange is used to be fixed on the heating component of the main conductive circuit to achieve heat transfer. The heat transfer area is increased by the fixed flange, thereby accelerating the heat transfer efficiency.

[0041] The present invention further provides an embodiment of an insulated heat pipe radiator, the specific structure of which is the same as the structure of the insulated heat pipe radiator in the above-mentioned embodiment of the gas insulated switchgear, and will not be described in detail here.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. An insulated heat pipe radiator, comprising an insulated heat pipe, wherein the inner cavity of the insulated heat pipe has an insulating phase change medium, the insulated heat pipe comprises an evaporation section, a condensation section and an insulating section connected therebetween, characterized in that: One end of the evaporation section away from the insulating section is a sealed structure. The insulated heat pipe radiator also includes a condenser. The condenser has a condensation cavity. One end of the condensation section away from the insulating section is connected to the condensation cavity. The condenser is used to be arranged outside the switch housing.

2. The insulated heat pipe radiator according to claim 1, characterized in that: The condenser includes an upper condensation box, a lower condensation box and a condenser heat pipe connected between the upper and lower condensation boxes. The inner cavity of the upper condensation box, the inner cavity of the lower condensation box and the inner cavity of the condenser heat pipe together constitute the condensation chamber. A connecting hole is provided on the box body of the lower condensation box. One end of the condensation section away from the insulating section is connected to the connecting hole and communicates with the condensation chamber.

3. The insulated heat pipe radiator according to claim 2, characterized in that: There are more than two condenser heat pipes, and each condenser heat pipe is independent of each other.

4. The insulated heat pipe radiator according to claim 3, characterized in that: All condenser heat pipes are arranged in a matrix.

5. The insulated heat pipe radiator according to claim 2, characterized in that: The outer peripheral surface of the condenser heat pipe is provided with heat dissipation fins.

6. The insulated heat pipe radiator according to any one of claims 1 to 5, characterized in that: The insulating section comprises an insulating main section, both ends of which are respectively connected with joints, which are respectively connected with the evaporation section and the condensation section, and a shielding member is provided at the connection position between the joint connected with the evaporation section and the insulating main section.

7. The insulated heat pipe radiator according to claim 6, characterized in that: A shielding member is also provided at the connection portion between the joint connected to the condensation section and the insulating main body section.

8. The insulated heat pipe radiator according to claim 6, characterized in that: The insulating main body section is a ceramic tube, the joints at both ends are metal joints, and the shielding component is welded together with the ceramic tube and the metal joints.

9. A gas-insulated switchgear, comprising a switch housing, wherein a main conductive circuit is arranged inside the switch housing, characterized in that: It also includes the insulated heat pipe radiator as described in any one of claims 1-8, the condenser of the insulated heat pipe radiator is arranged outside the switch housing, the evaporation section is in direct or indirect contact with the heat-generating components of the main conductive circuit for heat transfer, and the condensation section extends out of the switch housing and is connected to the condenser.

10. The gas insulated switchgear according to claim 9, characterized in that: The heating component of the main conductive circuit is provided with a mounting groove, in which a clamp-type flange is installed. The end of the evaporation section away from the insulating section is in indirect contact with the heating component of the main conductive circuit for heat transfer through the clamp-type flange.

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