High-air-pressure end cover type radiator and working method thereof

Abstract

The invention discloses a high-pressure end cover type radiator and a working method thereof, and belongs to the field of switch equipment heat dissipation, the high-pressure end cover type radiator comprises a heat dissipation shell and a gas diversion channel structure, the heat dissipation shell is in airtight connection with a pull opening of a GIS equipment tank, and an annular gap is formed between the heat dissipation shell and the gas diversion channel structure; the structure of the gas diversion channel is divided into an ascending channel and a descending channel, the ascending channel and the descending channel are communicated at the top end in the heat dissipation shell, the ascending channel and the descending channel are arranged at the joint of the heat dissipation shell and the GIS equipment tank in a staggered mode and are not communicated with each other, one end of the ascending channel is communicated with an inner cavity of the GIS equipment tank, and the other end of the descending channel is communicated with an outer cavity of the GIS equipment tank. And the other end of the inclined hole channel is communicated with the descending channel at the top end in the heat dissipation shell, and the descending channel is communicated with the inclined hole channel to the inner cavity of the GIS equipment tank body through the annular gap. According to the invention, the heat exchange capability of the GIS equipment can be improved.

Description

Technical Field

[0001] The invention belongs to the field of heat dissipation of switch equipment, and in particular relates to a high-pressure end cover type radiator and a working method thereof. Background Art

[0002] SF6 is no longer in line with the current application trend of green environmentally friendly switches due to its high global warming potential (GWP=23900). The current technical route for environmentally friendly medium and high voltage gas-filled products is to use natural N2, N2+O2, CO2, etc. as insulating media and vacuum breaking technology as the main switch arc extinguishing technology, which can achieve lower greenhouse gas emissions. Environmentally friendly products at voltage levels of 40.5kV and above require an inflation pressure of more than 0.2MPa (20℃ gauge pressure) to meet insulation requirements, so the pressure container needs to be a tank container made of aluminum alloy casting or welding; using higher pressure is conducive to miniaturization of the product insulation structure and also helps to reduce temperature rise.

[0003] As the proportion of new energy power generation such as wind power and photovoltaic power generation gradually increases, products with a high current rating of more than 2500A can better meet the demand for large single-unit capacity installation in the field of new energy power generation, and have technical advantages. However, the thermal conductivity of environmentally friendly media such as air is worse than that of SF6, the sealing of the box makes the heat dissipation conditions more severe, and the small volume of the tank shell also brings challenges to the temperature rise of the product. From the test results, it is already very difficult to increase the temperature of the tank-type environmentally friendly switchgear with a rated current of 2500A, and the temperature rise problem of 3150A products will be even more severe.

[0004] At present, in order to solve the above problems, the main circuit of gas insulated metal-enclosed switchgear (GIS) is usually optimized first, such as increasing the conductor flow cross-section, hollow conductor design, using high conductivity alloy materials, increasing the number of touch fingers, etc.; or optimizing the complex conductor shape to reduce the heat generation power. However, there is a limit to reducing the heat generation power. The current heat dissipation solution lacks internal flow channel design and has problems with heat exchange capacity. Summary of the invention

[0005] The object of the present invention is to provide a high-pressure end cover type radiator and a working method thereof, so as to solve the problem of poor heat exchange capacity caused by the lack of internal flow channel design in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, a high-pressure end cap type heat sink comprises: a heat dissipation shell and a gas guide channel structure, the heat dissipation shell is airtightly connected to the drawer of the GIS equipment tank body, and an annular gap is formed between the heat dissipation shell and the gas guide channel structure; The gas guide channel structure is divided into an ascending channel and a descending channel, and the ascending channel and the descending channel are connected at the top of the heat dissipation shell. The ascending channel and the descending channel are staggered and not connected to each other at the connection between the heat dissipation shell and the GIS equipment tank body. One end of the ascending channel is connected to the inner cavity of the GIS equipment tank body, and the other end is connected to the descending channel at the top of the heat dissipation shell. The descending channel is connected to the inner cavity of the GIS equipment tank body through the annular gap.

[0007] In some embodiments, the gas guide channel structure includes a staggered hole matching structure, an upper guide tube and a lower guide tube, the staggered hole matching structure is arranged between the upper guide tube and the lower guide tube, the upper guide tube is connected to the lower guide tube through the staggered hole matching structure and are not connected to each other, one end of the upper guide tube is connected to the top of the heat dissipation shell and the other end is connected to the inner cavity of the GIS equipment tank through the staggered hole matching structure, one end of the lower guide tube is connected to the inner cavity of the GIS equipment tank and the other end is connected to the annular gap through the staggered hole matching structure.

[0008] In some embodiments, the staggered hole mounting structure is composed of an upper guide flange and a lower guide flange that are staggered in holes. The upper guide flange is installed at the bottom end of the upper guide tube, and the lower guide flange is installed at the top end of the lower guide tube.

[0009] In some embodiments, a plurality of upper guide inclined hole channels are arranged on the upper guide flange, and a plurality of lower guide inclined hole channels are arranged on the lower guide flange, wherein the upper guide inclined hole channels connect the interior of the GIS equipment tank and the upper guide tube, and a plurality of lower guide inclined hole channels are arranged on the lower guide flange, wherein the lower guide inclined hole channels connect the annular gap and the lower guide tube.

[0010] In some embodiments, the heat dissipation shell includes a heat dissipation top cover and a shell flange. The heat dissipation top cover is welded to the top of the heat dissipation shell, the shell flange is installed on the bottom of the heat dissipation shell, and the heat dissipation shell is airtightly connected to the drawer of the GIS equipment tank through the shell flange.

[0011] In some embodiments, the heat dissipation shell is composed of a plurality of cylindrical radiator modules, wherein the cylindrical radiator module includes a hollow cylinder, inner fins and outer fins, wherein the inner fins are arranged along the circumference of the inner wall of the hollow cylinder, and the outer fins are arranged along the circumference of the outer wall of the hollow cylinder.

[0012] In some embodiments, the heat dissipation top cover is mounted on the cylindrical radiator module located at the top end of the heat dissipation shell, and the shell flange is mounted on the cylindrical radiator module located at the bottom end of the heat dissipation shell and fixed on the can body drawing mouth.

[0013] In a second aspect, a method for operating a high pressure end cap type radiator comprises the following steps: The high-pressure hot air flow inside the tank body of the GIS equipment enters the interior of the upper guide tube through the upper guide inclined hole channel of the upper guide flange, and after rising to the top of the heat dissipation shell, the cooling reflux is further cooled through the gap between the heat dissipation shell and the upper guide tube, flows downward into the lower guide inclined hole channel of the lower guide flange, enters the interior of the lower guide tube and finally flows back to the tank body of the GIS equipment.

[0014] In a third aspect, a method for operating a high pressure end cap type radiator comprises the following steps: The high-pressure hot air flow inside the tank of the GIS equipment enters the interior of the upper guide tube through the upper guide inclined hole channel of the upper guide flange, and rises to the heat dissipation top cover of the heat dissipation shell. The cooling reflux absorbs heat through the inner fins between the heat dissipation shell and the upper guide tube, and further cools through the outer fins; After flowing downward into the lower guide inclined hole channel of the lower guide flange, it enters the interior of the lower guide cylinder and finally flows back to the interior of the tank body of the GIS equipment.

[0015] In some embodiments, the upper flow guide tube, the upper flow guide flange, the lower flow guide tube and the lower flow guide flange are all made of low thermal conductivity materials.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a high-pressure end cover type radiator, wherein a heat dissipation shell is airtightly connected to a tapping of a GIS equipment tank body, an annular gap is formed between the heat dissipation shell and a gas guide channel structure, and an end cover type external installation method is adopted, so that the high-pressure gas inside the tank body and the inside of the radiator can be connected, and the overall temperature rise of the switch device can be effectively reduced without changing the main circuit of the switch device, and the flow capacity can be improved. The installation is convenient and has universality; in addition, the gas guide channel structure is divided into an ascending channel and a descending channel, and the ascending channel and the descending channel are connected at the top of the heat dissipation shell, and the ascending channel and the descending channel are staggered and not connected to each other at the connection between the heat dissipation shell and the GIS equipment tank body, one end of the ascending channel is connected to the inner cavity of the GIS equipment tank body, and the other end is connected to the descending channel at the top of the heat dissipation shell, and the descending channel is connected to the inner cavity of the GIS equipment tank body through the annular gap, and the ascending channel and the descending channel are separated and independently designed from each other, so that the high-pressure hot air flow generated by the operation of the switch device can be accelerated to cool and reflux in the radiator, effectively reducing the overall temperature rise in the tank-type gas insulated switch device, and improving the heat exchange capacity of the switch device.

[0017] Furthermore, the present invention can form separate airflow rising channels and descending channels through the staggered hole mounting structure of the upper guide flange and the lower guide flange, and form an effective height difference and guide channel through the upper guide tube and the lower guide tube, so that the high-pressure hot air flow generated during the operation of the switch equipment is accelerated to cool and reflux in the radiator, effectively reducing the overall temperature rise in the tank-type gas-insulated switch equipment.

[0018] Furthermore, the heat dissipation housing of the present invention is composed of a plurality of cylindrical heat sink modules, wherein the cylindrical heat sink module comprises a hollow cylinder, inner fins and outer fins, wherein the inner fins are arranged along the inner wall circumference of the hollow cylinder, and the outer fins are arranged along the outer wall circumference of the hollow cylinder. This structure can enhance the heat exchange capacity of the heat dissipation housing by absorbing heat through the inner fins and dissipating heat through the outer fins. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The overall structural schematic diagram of the high-pressure end-cap type radiator provided in the first embodiment of the present invention; Figure 2 A cross-sectional view of a high-pressure end-cap type radiator provided in Embodiment 1 of the present invention; Figure 3 A schematic diagram of a gas guide channel structure provided in Embodiment 1 of the present invention; Figure 4 A front view of the gas guide channel structure provided in the first embodiment of the present invention; Figure 5 The overall structural schematic diagram of the high-pressure end-cap type radiator provided in the second embodiment of the present invention; Figure 6 A cross-sectional view of a high-pressure end-cap type radiator provided in Embodiment 2 of the present invention; Figure 7 A schematic structural diagram of a cylindrical radiator module provided in Embodiment 2 of the present invention; Figure 8 A top view of a cylindrical radiator module provided in Embodiment 2 of the present invention; Fig. 9 A schematic diagram of installing a high-pressure end-cap type radiator provided in an embodiment of the present invention on a GIS equipment tank; Fig.10 Schematic diagrams of an airflow ascending channel and an airflow descending channel provided in an embodiment of the present invention, wherein (a) is a schematic diagram of the airflow ascending channel, and (b) is a schematic diagram of the airflow descending channel.

[0020] In the figure, 1. heat dissipation shell; 2. gas guide channel structure; 3. upper guide tube; 4. upper guide flange; 5. lower guide flange; 6. lower guide tube; 7. cylindrical radiator module; 8. heat dissipation top cover; 9. shell flange; 10. GIS equipment tank. DETAILED DESCRIPTION

[0021] In the following, only certain exemplary embodiments are briefly described, and the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0022] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connected", "fixed" and the like should 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] At present, the cooling fins of high-current gas-insulated switchgear are usually directly welded or fixed on the top of the equipment, lacking internal flow channel design. The cooling fins mainly rely on natural convection for heat dissipation, with low heat dissipation efficiency, and it is difficult to meet the heat dissipation needs of high-current equipment; the cooling fins need to occupy space on the top of the equipment, so the distribution on the top of the equipment may be limited by the structure, resulting in uneven heat distribution and excessively high temperatures in some areas, which reduces the heat exchange capacity of the switchgear. In addition, some switchgear uses forced air cooling technology for heat dissipation. Although it can significantly improve the heat dissipation efficiency, the fan of the forced air cooling technology needs to be powered separately, which increases the energy consumption and operating cost of the equipment, and the reliability and life of the fan will also affect the overall reliability of the switchgear. Therefore, the embodiments of the present application perform internal flow channel design without relying on the fan power supply to improve the heat exchange capacity of the switchgear.

[0027] Embodiment 1 like Figure 1 and Figure 2 As shown, this embodiment provides a high-pressure end cover type radiator, which is vertically installed on the upper part of the GIS equipment tank 10, including a heat dissipation shell 1 and a gas guide channel structure 2, both of which are hollow in design and filled with high-pressure environmentally friendly gas.

[0028] The heat dissipation housing 1 adopts a three-section metal welding structure, including a heat dissipation top cover 8 and a housing flange 9. The heat dissipation top cover 8 is welded to the top of the heat dissipation housing 1, and the housing flange 9 is installed at the bottom of the heat dissipation housing 1. Fig. 9 As shown, the heat dissipation housing 1 is fixed to the outlet of the GIS equipment tank 10 through the housing flange 9 and has a corresponding sealing structure to cope with high-pressure sealing requirements.

[0029] like Figure 3 and Figure 4 As shown, the gas guide channel structure 2 includes an upper guide tube 3, an upper guide flange 4, a lower guide tube 6 and a lower guide flange 5, and the upper guide tube 3, the upper guide flange 4, the lower guide tube 6 and the lower guide flange 5 are all made of low thermal conductivity materials; The upper guide flange 4 is installed at the bottom end of the upper guide tube 3, and a plurality of upper guide oblique hole channels are arranged on the upper guide flange 4. The upper guide oblique hole channels communicate with the interior of the GIS equipment tank 10 and the interior of the upper guide tube 3. The top end of the upper guide tube 3 communicates with the interior of the heat dissipation shell 1. The above structure forms an airflow ascending channel, such as Fig.10 As shown in (a), Fig.10 The direction of the middle arrow is the direction of gas flow. The high-pressure hot air flow inside the GIS equipment tank rises to the top of the heat dissipation housing 1 through the air flow rising channel; The lower guide flange 5 is installed at the top of the lower guide tube 6, and a plurality of lower guide oblique hole channels are arranged on the lower guide flange 5. There is a gap between the upper guide tube 3 and the heat dissipation shell 1, and the lower guide oblique hole channel communicates with the gap and the inside of the lower guide tube 6. The bottom end of the lower guide tube 6 is connected to the inside of the GIS equipment tank 10. The above structure forms an airflow descending channel, such as Fig.10 As shown in (b), the high-pressure hot air flow at the top of the heat dissipation housing 1 flows back to the inside of the GIS equipment tank 10 through the air flow descending channel. In this process, the high-pressure hot air flow is cooled by the heat dissipation housing 1; The upper flow guiding inclined hole channels are distributed in the circumferential direction of the flow guiding flange 4 above, and the lower flow guiding inclined hole channels are distributed in the circumferential direction of the flow guiding flange 5 below.

[0030] The upper guide flange 4 and the lower guide flange 5 are docked and installed as a staggered hole mounting structure. The respective hole positions of the upper guide flange 4 and the lower guide flange 5 are staggered when docked, so the upper guide inclined hole channel does not directly connect to the lower guide inclined hole channel in the vertical direction. This staggered arrangement design helps to optimize the gas flow path, reduce flow resistance, and improve heat dissipation efficiency. Since the upper guide inclined hole channel and the lower guide inclined hole channel are distributed in the circumferential direction of the upper guide flange 4 and the lower guide flange 5, respectively, and they are not directly connected, but are respectively connected to the airflow rising channel and the airflow falling channel, it is ensured that the rising airflow and the descending airflow are physically separated from each other. Since the hot airflow and the cooled airflow flow along different paths, respectively, the energy loss in the heat exchange process is reduced, and the temperature fluctuation and stress change caused by the mixing of cold and hot air can also be avoided.

[0031] The working method of the high pressure end cap type radiator provided in this embodiment is as follows: The high-pressure hot air flow inside the GIS equipment tank 10 enters the interior of the upper guide tube 3 through the upper guide inclined hole channel of the upper guide flange 4, and rises to the top of the heat dissipation shell 1. After being further cooled through the gap between the heat dissipation shell 1 and the upper guide tube 3 , the cooling reflux flows downward into the lower guide inclined hole channel of the lower guide flange 5 , enters the lower guide tube 6 and finally flows back into the GIS equipment tank 10 .

[0032] The high-pressure end cap type radiator provided in this embodiment is an external structure, which can effectively reduce the overall temperature rise of the equipment and improve the flow capacity without changing the main circuit of the switchgear. It has the characteristics of modularity, versatility and easy installation. For high-current environmental protection products, additional heat dissipation capacity can be provided on the basis of the circuit design; through the design of the gas guide channel structure 2, separate airflow ascending channels and descending channels are formed, which can increase the effective heat exchange area, thereby effectively solving the high-current temperature rise problem of environmental protection products. The high-pressure end cap type radiator provided in this embodiment adopts an end cap type external installation method, and is installed on the upper part of the tank body through the tank body pull-out of the gas-insulated metal-enclosed switchgear, so that the high-pressure gas in the tank is connected with the inside of the radiator; an effective height difference and guide channel are formed by the upper guide tube 3 and the lower guide tube 6, so that the high-pressure hot air flow generated during the operation of the switchgear is accelerated to cool and reflux in the radiator, thereby effectively reducing the overall temperature rise in the tank-type gas-insulated switchgear.

[0033] Embodiment 2 like Figure 5 and Figure 6 As shown, this embodiment provides a high-pressure end cover type heat sink, including a heat dissipation shell 1 and a gas guide channel structure 2, both of which are hollow in design and filled with high-pressure environmentally friendly gas.

[0034] The heat dissipation shell 1 adopts a three-section metal welding structure, including a heat dissipation top cover 8 and a shell flange 9. The heat dissipation top cover 8 is welded to the top of the heat dissipation shell 1, and the shell flange 9 is installed on the bottom of the heat dissipation shell 1. The heat dissipation shell 1 is fixed to the drawing mouth of the GIS equipment tank body 10 through the shell flange 9, and has a corresponding sealing structure, which can meet the high-pressure sealing requirements.

[0035] like Figure 7 and Figure 8 As shown, the heat dissipation housing 1 is welded by four sections of cylindrical heat sink modules 7, and the cylindrical heat sink module 7 includes a hollow cylinder, inner fins and outer fins, wherein the inner fins are arranged along the inner wall circumference of the hollow cylinder, and the outer fins are arranged along the outer wall circumference of the hollow cylinder. The cylindrical heat sink module 7 adopts a casting process, and the welded cylindrical heat sink module 7 is combined with a heat dissipation top cover 8 and a housing flange 9 into one body.

[0036] The heat dissipation top cover 8 is installed on the cylindrical radiator module 7 located at the top end of the heat dissipation shell 1, and the shell flange 9 is installed on the cylindrical radiator module 7 located at the bottom end of the heat dissipation shell 1 and fixed on the extraction port of the GIS equipment tank body 10.

[0037] The gas guide channel structure 2 includes an upper guide tube 3, an upper guide flange 4, a lower guide tube 6 and a lower guide flange 5. The upper guide flange 4 and the lower guide flange 5 are docked and installed as a staggered hole mounting structure. The upper guide tube 3, the upper guide flange 4, the lower guide tube 6 and the lower guide flange 5 are all made of low thermal conductivity materials. The upper guide flange 4 is installed at the bottom end of the upper guide tube 3. A plurality of upper guide inclined hole channels are arranged on the upper guide flange 4. The upper guide inclined hole channels connect the interior of the GIS equipment tank body 10 and the interior of the upper guide tube 3. The top end of the upper guide tube 3 is connected to the interior of the heat dissipation shell 1. The lower guide flange 5 is installed at the top end of the lower guide tube 6. A plurality of lower guide inclined hole channels are arranged on the lower guide flange 5. There is a gap between the upper guide tube 3 and the heat dissipation shell 1. The lower guide inclined hole channel connects the gap and the interior of the lower guide tube 6. The bottom end of the lower guide tube 6 is connected to the interior of the GIS equipment tank body 10.

[0038] The working method of the high pressure end cap type radiator provided in this embodiment is as follows: The high-pressure hot air flow inside the GIS equipment tank 10 enters the interior of the upper guide tube 3 through the upper guide inclined hole channel of the upper guide flange 4, and rises to the heat dissipation top cover 8 of the heat dissipation shell 1. The cooling reflux absorbs heat through the inner fins between the heat dissipation housing 1 and the upper guide tube 3, and dissipates heat through the outer fins. After flowing downward into the lower guide inclined hole channel of the lower guide flange 5 , it enters the lower guide cylinder 6 and finally flows back to the GIS equipment tank body 10 .

[0039] Based on the first embodiment, this embodiment adds a cylindrical radiator module 7 to the heat dissipation shell 1, sets inner fins on the inner wall of the hollow cylinder, and sets outer fins on the outer wall of the hollow cylinder. The inner fins absorb heat and the outer fins dissipate heat, which can further improve the heat exchange capacity of the radiator in the first embodiment.

[0040] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects, not exclusive, and all changes within the scope of the present invention or equivalent to the scope of the present invention are included in the present invention.

Claims

1. A high pressure end cap type radiator, characterized in that: include: A heat dissipation shell (1) and a gas guide channel structure (2), the heat dissipation shell (1) being airtightly connected to the tapping of the GIS equipment tank body, and an annular gap being formed between the heat dissipation shell (1) and the gas guide channel structure (2); The gas flow guide channel structure (2) is divided into an ascending channel and a descending channel, wherein the ascending channel and the descending channel are connected at the top of the heat dissipation shell (1), and the ascending channel and the descending channel are staggered and not connected to each other at the connection between the heat dissipation shell (1) and the GIS equipment tank body, wherein one end of the ascending channel is connected to the inner cavity of the GIS equipment tank body, and the other end is connected to the descending channel at the top of the heat dissipation shell (1), and the descending channel is connected to the inner cavity of the GIS equipment tank body through the annular gap.

2. A high pressure end cap type radiator according to claim 1, characterized in that: The gas guide channel structure (2) comprises a staggered hole pairing structure, an upper guide tube (3) and a lower guide tube (6), wherein the staggered hole pairing structure is arranged between the upper guide tube (3) and the lower guide tube (6), the upper guide tube (3) is connected to the lower guide tube (6) via the staggered hole pairing structure and the two tubes are not connected to each other, one end of the upper guide tube (3) is connected to the top of the heat dissipation shell (1) and the other end is connected to the inner cavity of the GIS equipment tank via the staggered hole pairing structure, and one end of the lower guide tube (6) is connected to the inner cavity of the GIS equipment tank and the other end is connected to the annular gap via the staggered hole pairing structure.

3. A high pressure end cap type radiator according to claim 2, characterized in that: The staggered hole mounting structure is composed of an upper guide flange (4) and a lower guide flange (5) which are staggered hole mounted. The upper guide flange (4) is mounted on the bottom end of the upper guide tube (3), and the lower guide flange (5) is mounted on the top end of the lower guide tube (6).

4. A high pressure end cap type radiator according to claim 3, characterized in that: A plurality of upper flow guide inclined hole channels are provided on the upper flow guide flange (4), and a plurality of lower flow guide inclined hole channels are provided on the lower flow guide flange (5). The upper flow guide inclined hole channels are connected to the interior of the GIS equipment tank body and the upper flow guide tube (3), and a plurality of lower flow guide inclined hole channels are provided on the lower flow guide flange (5). The lower flow guide inclined hole channels are connected to the annular gap and the lower flow guide tube (6).

5. The high pressure end cap type radiator according to claim 1, characterized in that: The heat dissipation housing (1) comprises a heat dissipation top cover (8) and a housing flange (9); the heat dissipation top cover (8) is welded to the top end of the heat dissipation housing (1); the housing flange (9) is installed to the bottom end of the heat dissipation housing (1); and the heat dissipation housing (1) is airtightly connected to the tapping of the GIS equipment tank body via the housing flange (9).

6. A high pressure end cap type radiator according to claim 5, characterized in that: The heat dissipation housing (1) is composed of a plurality of cylindrical heat sink modules (7), wherein the cylindrical heat sink module (7) comprises a hollow cylinder, inner fins and outer fins, wherein the inner fins are arranged along the circumference of the inner wall of the hollow cylinder, and the outer fins are arranged along the circumference of the outer wall of the hollow cylinder.

7. A high pressure end cap type radiator according to claim 6, characterized in that: The heat dissipation top cover (8) is mounted on the cylindrical radiator module (7) located at the top end of the heat dissipation shell (1), and the shell flange (9) is mounted on the cylindrical radiator module (7) located at the bottom end of the heat dissipation shell (1) and fixed on the can body drawing mouth.

8. The operating method of a high pressure end cap type radiator as claimed in claim 4, characterized in that: The following steps are involved: The high-pressure hot air flow inside the tank of the GIS equipment enters the interior of the upper guide tube (3) through the upper guide inclined hole channel of the upper guide flange (4) and rises to the top of the heat dissipation housing (1). The cooling reflux passes through the gap between the heat dissipation housing (1) and the upper guide tube (3), flows downward into the lower guide inclined hole channel of the lower guide flange (5), enters the interior of the lower guide tube (6), and finally flows back into the tank body of the GIS equipment.

9. The operating method of a high pressure end cap type radiator according to claim 7, characterized in that: The following steps are involved: The high-pressure hot air flow inside the tank of the GIS equipment enters the interior of the upper guide tube (3) through the upper guide inclined hole channel of the upper guide flange (4), and rises to the heat dissipation top cover (8) of the heat dissipation housing (1). The cooling reflux absorbs heat through the inner fins between the heat dissipation housing (1) and the upper guide tube (3), and dissipates heat through the outer fins. After flowing downward into the lower guide inclined hole channel of the lower guide flange (5), it enters the interior of the lower guide cylinder (6) and finally flows back to the interior of the tank body of the GIS equipment.

10. The working method according to claim 8 or 9, characterized in that: The upper flow guide tube (3), the upper flow guide flange (4), the lower flow guide tube (6) and the lower flow guide flange (5) are all made of low thermal conductivity material.

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