An electromagnetic shielding and heat dissipation integrated ring main unit

Abstract

The application relates to the technical field of ring network cabinets, and discloses a ring network cabinet integrating electromagnetic shielding and heat dissipation, which aims to solve the problems of interference of external electromagnetism on electrical devices in the ring network cabinet and waste caused by direct discharge of environment-friendly gas. The heat dissipation mechanism is arranged, when the temperature in the electrical cavity reaches a certain value, the left and right cavity bodies are moved in opposite directions through the upper piston plates, the environment-friendly gas with a certain heat in the electrical cavity is drawn into the heat dissipation cavity, and the low-temperature environment-friendly gas in the heat dissipation cavity enters the electrical cavity. Through the action, heat dissipation of the electrical devices is realized, meanwhile, the cabinet body is made of stainless steel plates, the stainless steel plates have high conductivity, can generate strong reflection loss, effectively block external high-frequency electromagnetic radiation, and realize the electromagnetic shielding function.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ring main units, in particular to a ring main unit integrating electromagnetic shielding and heat dissipation. BACKGROUND

[0002] The ring main unit is an electrical device for power system transmission and distribution, and is widely used in power distribution stations of load centers such as urban residential communities and high-rise buildings due to the advantages of small size, provided power parameters and performance, and power safety.

[0003] Some existing ring main units only fill the cabinet with environment-friendly gas, and use the environment-friendly gas as an insulating medium and a cooling medium. When the temperature of the environment-friendly gas rises, the hot environment-friendly gas is discharged, and new environment-friendly gas is transported into the ring main unit. This will cause waste of the environment-friendly gas. In addition, the ring main unit itself needs electromagnetic shielding function to prevent external electromagnetic interference on the electrical devices in the ring main unit. SUMMARY

[0004] The application provides a ring main unit integrating electromagnetic shielding and heat dissipation, which has the advantages of electromagnetic shielding, heat dissipation, and reduction of waste of environment-friendly gas, so as to solve the problems of external electromagnetic interference on the electrical devices in the ring main unit and waste caused by direct discharge of the environment-friendly gas.

[0005] To achieve the above purpose, the application adopts the following technical scheme: a ring main unit integrating electromagnetic shielding and heat dissipation, comprising: a cabinet and a base, the cabinet and the base are both made of stainless steel plates, a partition plate is fixedly installed at the position between the inner cavity of the cabinet and the inner cavity of the base, the inner cavity of the cabinet is an electrical cavity, the inner cavity of the base is a heat dissipation cavity, a heat dissipation mechanism is arranged in the heat dissipation cavity, and the heat dissipation mechanism comprises:

[0006] A partition piece is fixedly installed at the middle position in the heat dissipation cavity, and the heat dissipation cavity is divided into left and right cavities by the partition piece;

[0007] An upper piston plate is sealingly and slidingly installed in the left and right cavities;

[0008] A first electric cylinder is used to drive the corresponding upper piston plate to move up and down, the first electric cylinder on the left is in a contraction state, and the first electric cylinder on the right is in an elongation state, and the electrical cavity and the heat dissipation cavity are both filled with environment-friendly gas above the upper piston plate;

[0009] A switching in-out gas mechanism is arranged in the partition plate, and the left and right cavities exchange in-gas and out-gas through the switching in-out gas mechanism;

[0010] An environment-friendly gas vent hole is formed in the lower position of the side surface of the base, and the environment-friendly gas vent hole is connected with the outside environment and the space in the heat dissipation cavity below the upper piston plate.

[0011] Further, the heat dissipation mechanism further comprises:

[0012] Liquid tanks are fixedly installed on both sides of the base, and the liquid tanks on both sides are communicated through connecting pipes;

[0013] The heat dissipation pipes are communicated and arranged in the liquid tanks, the heat dissipation pipes extend into the cavities above the upper piston plate, and the liquid tanks and the heat dissipation pipes are filled with cooling liquid.

[0014] Further, the heat dissipation pipes are divided into active pipes and passive pipes, the active pipes and the passive pipes are in sealed sliding clamping connection with the base, a screw rod is rotatably installed in the right liquid tank, the screw rod is in threaded transmission connection with the inner wall of the active pipe, a second motor is fixedly installed on the outer side surface of the one-side liquid tank, the output end of the second motor is in fixed connection with the screw rod, and the liquid tanks and the heat dissipation pipes are filled with oil-based cooling liquid.

[0015] Further, the switching in and out air mechanism comprises:

[0016] The rotating disc is sealingly rotatably installed on the upper side surface of the partition plate;

[0017] The first air inlet one-way valve is fixedly installed at the left position in the interior of the rotating disc;

[0018] The first air outlet one-way valve is fixedly installed at the right position in the interior of the rotating disc;

[0019] The main through hole is longitudinally and vertically arranged at the positions on both sides of the interior of the partition plate, the environment-friendly gas in the electrical cavity enters the corresponding heat dissipation cavity through the first air inlet one-way valve and the main through hole at the corresponding position, and the corresponding heat dissipation cavity enters the electrical cavity through the first air outlet one-way valve and the main through hole at the corresponding position;

[0020] The first motor is fixedly installed in the interior of the partition piece, and the output shaft of the first motor penetrates through the partition plate and is in fixed connection with the center position of the rotating disc.

[0021] Further, the left and right cavities and the positions below the upper piston plate are provided with a supplement mechanism, and the supplement mechanism comprises:

[0022] The lower piston plate is sealingly and slidingly installed in the left and right cavities and the positions below the upper piston plate;

[0023] The upper through hole is longitudinally and vertically arranged in the interior of the upper piston plate;

[0024] The upper piston plate and the lower piston plate are fixedly connected through the first spring.

[0025] Further, the supplement mechanism further comprises:

[0026] Lower through hole, longitudinally penetratingly arranged in the interior of the lower piston plate;

[0027] The lower through hole is closed by the second spring and is plugged with a closing block;

[0028] The contact rod is fixedly installed on the bottom surface of the left and right cavities and corresponds to the position of the closing block.

[0029] The blocking strip is fixedly installed in the left and right cavities and is located above the position of the environment-friendly gas exhaust hole.

[0030] Further, the temperature sensor is fixedly installed at the center position of the upper side of the rotating disc, the detection needle of the temperature sensor penetrates into the electrical cavity, and the temperature sensor is remotely electrically connected with the first electric cylinder and the second motor.

[0031] Further, the extension plate is fixedly installed above the rotating disc, and the minimum distance value from the extension plate to the rotating disc is greater than the length value of the detection needle of the temperature sensor and the length value of the first air inlet one-way valve and the first air outlet one-way valve penetrating into the electrical cavity.

[0032] The application has the following beneficial effects:

[0033] The application provides an environment-friendly ring main unit with electromagnetic shielding and heat dissipation integration. Through the arrangement of the heat dissipation mechanism, when the temperature in the electrical cavity reaches a certain value, the upper piston plate in the left and right cavities moves in the opposite direction, so that the environment-friendly gas with a certain heat in the electrical cavity is drawn into the heat dissipation cavity, and the low-temperature environment-friendly gas in the heat dissipation cavity enters the electrical cavity. Through this action, the heat dissipation of the electrical device is realized. At the same time, since the cabinet body is made of stainless steel plate, the stainless steel plate has high conductivity and can produce strong reflection loss, thereby effectively blocking the external high-frequency electromagnetic radiation, thereby realizing the electromagnetic shielding function.

[0034] Through the arrangement of the heat dissipation pipe, when the upper piston plate in the left and right cavities moves in the opposite direction, the heat dissipation pipe further penetrates into the cavity corresponding to the upward movement of the upper piston plate, thereby synchronously extruding the gas in the cavity, so that the amount of low-temperature gas in the cavity entering the electrical cavity increases when the upper piston plate moves up to the fixed position. Correspondingly, the heat dissipation pipe further penetrates out of the cavity corresponding to the downward movement of the upper piston plate, thereby cooperating with the corresponding upper piston plate, so that the amount of high-temperature gas entering the cavity increases. Through the above action, the heat dissipation effect of the electrical device is improved.

[0035] Through the setting of the heat dissipation mechanism and the supplement mechanism, when the electrical devices in the electrical cavity abnormally and rapidly heat up, the low-temperature gas in the heat dissipation cavity has a weak cooling effect on the electrical cavity at this time, the gas heated and expanded in the electrical cavity will enter the heat dissipation cavity and pass through the upper piston plate, thereby driving the lower piston plate to move downward until the closed block in the lower piston plate is pushed open by the contact rod, so that the gas heated and expanded in the electrical cavity is discharged to the outside environment through the air vent, through this action, thereby reducing the probability of deformation of the base under pressure.

[0036] Through the setting of the heat dissipation mechanism and the supplement mechanism, when the gas in the electrical cavity enters the heat dissipation cavity, it will contact the heat dissipation pipe, thereby cooling the gas and reducing its volume. At the same time, through the setting of the supplement mechanism, when the gas volume in the heat dissipation cavity changes, the lower piston plate moves relatively, thereby reducing the pressure of the gas on the base and the upper piston plate. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings, which form a part of the specification, illustrate the embodiments of the present application and serve to explain the principles of the present application.

[0038] Referring to the drawings, the present application can be more clearly understood according to the following detailed description, in which:

[0039] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0040] Figure 2 It is a schematic diagram of the internal structure of the base of the present application;

[0041] Figure 3 It is a schematic diagram of the internal structure of the partition and the rotating disc of the present application;

[0042] Figure 4 It is a schematic diagram of the active pipe of the present application;

[0043] Figure 5 It is a schematic diagram of the internal structure of the passive pipe of the present application;

[0044] Figure 6 It is a schematic diagram of the connection state of the upper piston plate and the lower piston plate of the present application;

[0045] Figure 7 It is a schematic diagram of the setting position of the closed block of the present application.

[0046] In the figure: 1, base; 2, partition; 3, heat dissipation mechanism; 30, partition; 31, upper piston plate; 32, No. 1 electric cylinder; 33, rotating disc; 34, No. 1 air inlet one-way valve; 35, No. 1 air outlet one-way valve; 36, main through hole; 37, No. 1 motor; 38, liquid tank; 39, heat dissipation pipe; 390, driving pipe; 391, passive pipe; 4, temperature sensor; 5, extension plate; 6, screw rod; 7, No. 2 motor; 8, supplement mechanism; 80, lower piston plate; 81, upper through hole; 82, lower through hole; 83, No. 1 spring; 84, No. 2 spring; 85, sealing block; 86, contact rod; 87, blocking strip. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0048] Embodiment one: please refer to Figures 1-7The utility model provides an electromagnetic shielding and heat dissipation integrated ring main unit, including cabinet and base 1, cabinet and base 1 are made of stainless steel plate, cabinet is fixedly installed on the upside of base 1, the position between the inner chamber of cabinet and the inner chamber of base 1 is fixedly installed with baffle 2, the inner chamber of cabinet is electrical cavity, the inner chamber of base 1 is heat dissipation cavity, is provided with electrical device in electrical cavity, is provided with heat dissipation mechanism 3 in heat dissipation cavity, heat dissipation mechanism 3 includes partition 30, upper piston plate 31, no.

[0049] In use, the left and right cavities are moved in opposite directions by the no. 1 electric cylinder, for example, the left no. 1 electric cylinder is extended, driving the corresponding upper piston plate 31 to move down, so that the electrical cavity with a certain amount of heat of the environment-friendly gas is sucked into the left cavity through the switching in and out gas mechanism, the hot environment-friendly gas contacts the heat dissipation pipe 39, and then cools down, while the right no. 1 electric cylinder is retracted, driving the corresponding upper piston plate 31 to move up, so that the low-temperature environment-friendly gas in the right cavity enters the electrical cavity through the switching in and out gas mechanism. Through this action, the heat dissipation of the electrical device is realized. At the same time, since the cabinet is made of stainless steel plate, which has high electrical conductivity and can produce strong reflection loss, it effectively blocks external high-frequency electromagnetic radiation, thereby realizing electromagnetic shielding function. When the left and right cavities complete the in and out gas operation, the switching in and out gas mechanism is switched, thereby facilitating the subsequent left and right cavities to switch in and out gas operation.

[0050] To determine whether the electrical cavity needs to be cooled, please refer to Figures 1-7The temperature sensor 4 is installed on the switching in and out gas mechanism, the detection needle of the temperature sensor 4 is inserted into the electrical cavity, and the temperature sensor 4 is remotely connected with the first electric cylinder 32.

[0051] In use, when the temperature in the electrical cavity reaches a certain value, the temperature sensor 4 senses the temperature and sends a signal to the first electric cylinder 32, so that the first electric cylinder 32 in the left and right cavities moves in the opposite direction, and then the left and right cavities intake or exhaust gas, so as to realize the heat dissipation of the electrical device. After the left and right cavities complete the intake or exhaust operation, the switching in and out gas mechanism is switched, so as to facilitate the subsequent switching in and out gas operation of the left and right cavities.

[0052] In order to prolong the gas flow path, improve the heat dissipation effect, and reduce the misabsorption of low-temperature gas, please refer to Figures 1-7 The extension plate 5 is fixedly installed in the electrical cavity and above the switching in and out gas mechanism, and the minimum distance value from the extension plate 5 to the switching in and out gas mechanism is greater than the length value of the detection needle of the temperature sensor 4.

[0053] In use, when the temperature in the electrical cavity reaches a certain value, the temperature sensor 4 senses the temperature and sends a signal to the first electric cylinder 32, so that the first electric cylinder 32 in the left and right cavities moves in the opposite direction, and then the left and right cavities intake or exhaust gas, so as to realize the heat dissipation of the electrical device. After the left and right cavities complete the intake or exhaust operation, the switching in and out gas mechanism is switched, so as to facilitate the subsequent switching in and out gas operation of the left and right cavities.

[0054] In order to improve the heat dissipation effect of the electrical device, please refer to Figures 1-7 The heat dissipation pipe 39 is divided into the active pipe 390 and the passive pipe 391, and the active pipe 390 and the passive pipe 391 are both sealingly and slidably connected with the base 1. The screw rod 6 is rotatably installed in the right liquid tank 38, and the screw rod 6 is threadedly connected with the inner wall of the active pipe 390. The second motor 7 is fixedly installed on the outer side of the liquid tank 38, and the output end of the second motor 7 is fixedly connected with the screw rod 6. The liquid tank 38 and the heat dissipation pipe 39 are both filled with oil-based coolant.

[0055] In use, when the temperature in the electrical cavity reaches a certain value, the temperature sensor 4 senses the temperature and sends a signal to the first electric cylinder 32 and the second motor 7, causing the first electric cylinder 32 in the left and right cavities to move in opposite directions. For example, the first electric cylinder 32 on the left side extends, driving the corresponding upper piston plate 31 to move downward, so that the environmentally friendly gas with a certain heat in the electrical cavity is drawn into the left cavity through the switching in-out gas mechanism. The hot environmentally friendly gas contacts the heat dissipation pipe 39, thereby reducing the temperature. At the same time, the second motor 7 drives the screw rod 6 to rotate, causing the active pipe 390 on the right side to further extend into the right cavity, while the passive pipe 391 on the left side is further extended into the corresponding liquid tank 38 under the action of the liquid in the liquid tank 38, and cooperates with the downward moving upper piston plate 31 on the left side to increase the amount of high-temperature gas entering the left cavity. The first electric cylinder 32 on the right side retracts, driving the corresponding upper piston plate 31 to move upward, causing the low-temperature environmentally friendly gas in the right cavity to enter the electrical cavity through the switching in-out gas mechanism. At the same time, since the active pipe 390 further extends into the right cavity, it synchronously extrudes the gas in the cavity, so that when the upper piston plate 31 on the right side moves to the fixed position, the amount of low-temperature gas in the cavity entering the electrical cavity increases. Through the above actions, the flow of gas in the electrical cavity is increased, and the heat dissipation effect of the electrical device is improved. When the left and right cavities complete the in-out gas operation, the switching in-out gas mechanism changes position, thereby facilitating the subsequent left and right cavity switching in-out gas operation.

[0056] Please refer to Figures 1-7 The switching in-out gas mechanism includes a rotating disc 33, a first gas inlet one-way valve 34, a first gas outlet one-way valve 35, a main through hole 36, and a first motor 37. The rotating disc 33 is sealingly installed on the upper side of the partition plate 2. The temperature sensor 4 is fixedly installed at the center position of the upper side of the rotating disc 33. The extension plate 5 is fixedly installed above the rotating disc 33. The minimum distance value from the extension plate 5 to the rotating disc 33 is greater than the length value of the detection needle of the temperature sensor 4 and the length value of the first gas inlet one-way valve 34 and the first gas outlet one-way valve 35 extending into the electrical cavity. The first gas inlet one-way valve 34 is fixedly installed at the left position inside the rotating disc 33. The first gas outlet one-way valve 35 is fixedly installed at the right position inside the rotating disc 33. The main through hole 36 is longitudinally and vertically provided in the partition plate 2. The environmentally friendly gas in the electrical cavity can enter the corresponding heat dissipation cavity through the first gas inlet one-way valve 34 and the corresponding main through hole 36. The corresponding heat dissipation cavity can enter the electrical cavity through the main through hole 36 and the first gas outlet one-way valve 35. The first motor 37 is fixedly installed inside the partition 30. The output shaft of the first motor 37 penetrates the partition plate 2 and is fixedly connected with the center position of the rotating disc 33.

[0057] In use, when the temperature in the electrical cavity reaches a certain value, the temperature sensor 4 senses the temperature and sends a signal to the first electric cylinder 32 and the second motor 7, causing the first electric cylinder 32 in the left and right cavities to move in the opposite direction. For example, the left first electric cylinder 32 extends, driving the corresponding upper piston plate 31 to move down, so that the environmental gas with a certain heat in the electrical cavity is drawn into the left cavity through the first gas inlet one-way valve 34. The hot environmental gas contacts the heat dissipation pipe 39, thereby reducing the temperature. At the same time, the second motor 7 drives the screw rod 6 to rotate, so that the driving pipe 390 on the right side further extends into the right cavity, while the passive pipe 391 on the left side further extends into the corresponding liquid tank 38 under the action of the liquid in the liquid tank 38. Through the above actions, the suction and exhaust capacity of the corresponding cavity are increased. The right first electric cylinder 32 retracts, driving the corresponding upper piston plate 31 to move up, so that the low-temperature environmental gas in the right cavity enters the electrical cavity through the first exhaust one-way valve 35. When the left and right cavities complete the gas inlet or exhaust operation, the first motor 37 moves and drives the rotating disc 33 to rotate half a circle, so that the first gas inlet one-way valve 34 and the first exhaust one-way valve 35 are interchanged, thereby facilitating the subsequent left and right cavity switching in and out of the gas operation.

[0058] Example two: In order to cope with the situation that the electrical device in the electrical cavity does not normally heat up quickly, please refer to Figures 1-7 , the left and right cavities and the lower position of the upper piston plate 31 are provided with a supplement mechanism 8. The supplement mechanism 8 includes a lower piston plate 80, an upper through hole 81, a lower through hole 82, a first spring 83, a second spring 84, a sealing block 85, a contact rod 86 and a blocking strip 87. The left and right cavities and the lower position of the upper piston plate 31 are both sealed and slidingly installed with the lower piston plate 80. The inside of the upper piston plate 31 is longitudinally provided with the upper through hole 81. The inside of the lower piston plate 80 is longitudinally provided with the lower through hole 82. The upper piston plate 31 and the lower piston plate 80 are connected and fixed by the first spring 83. The sealing block 85 is inserted and closed at the lower through hole 82 through the second spring 84. The contact rod 86 is fixedly installed on the bottom surface of the left and right cavities and corresponds to the position of the sealing block 85. The environmental gas vent hole communicates the space below the lower piston plate 80 in the heat dissipation cavity with the outside environment. The left and right cavities and the position above the environmental gas vent hole are both fixedly installed with the blocking strip 87.

[0059] In use, when the temperature in the electrical cavity reaches a certain value, the temperature sensor 4 senses the temperature and sends a signal to the first electric cylinder 32 and the second motor 7, causing the first electric cylinder 32 in the left and right cavities to move in the opposite direction. For example, the left first electric cylinder 32 extends, driving the corresponding upper piston plate 31, first spring 83, and lower piston plate 80 to move down, so that the environmental gas with a certain heat in the electrical cavity is drawn into the left cavity through the first intake one-way valve 34. The hot environmental gas contacts the heat dissipation pipe 39, thereby reducing the temperature. At the same time, the second motor 7 drives the screw 6 to rotate, causing the right driven pipe 390 to further extend into the right cavity, while the left driven pipe 391 is further extended into the corresponding liquid tank 38 under the action of the liquid in the liquid tank 38. Through the above actions, the suction and exhaust capacity of the gas in the corresponding cavity is increased. The right first electric cylinder 32 retracts, driving the corresponding upper piston plate 31 and first spring 83 to move up, and pulling the lower piston plate 80 up through the first spring 83, so that the low-temperature environmental gas in the right cavity enters the electrical cavity through the first exhaust one-way valve 35. When the left and right cavities complete the intake or exhaust operation, the first motor 37 moves and drives the turntable 33 to rotate half a circle, causing the first intake one-way valve 34 and the first exhaust one-way valve 35 to exchange positions, thereby facilitating the subsequent switching of the left and right cavities for intake and exhaust operations. When the electrical components in the electrical cavity abnormally and rapidly heat up, the low-temperature gas in the above-mentioned right cavity entering the electrical cavity has a weak cooling effect on the electrical cavity at this time. The gas in the electrical cavity that is heated and expanded will enter the left cavity through the first intake one-way valve 34 and pass through the upper through-hole 81, thereby driving the lower piston plate 80 and the blocking block 85 to move down and stretching the first spring 83 until the lower piston plate 80 contacts the stop bar 87, causing the blocking block 85 to be pushed open by the contact rod 86 and stretching the second spring 84, so that the gas in the electrical cavity that is heated and expanded is discharged to the outside environment through the lower through-hole 82 and the environmental gas vent. Through this action, the probability of deformation of the base 1 under pressure is reduced. After that, when the temperature of the electrical components in the electrical cavity returns to normal, the first spring 83 drives the lower piston plate 80 to move up until the second spring 84 drives the blocking block 85 to close the lower through-hole 82. Finally, the base 1 can be supplemented with environmental gas through existing gas injection means (such as connecting a supplemental gas injection port through a gas charging pump, thereby supplementing the environmental gas in the base 1, and the supplemental gas injection port is an intake valve). In addition, when the hot environmental gas in the electrical cavity enters the left cavity, it will gradually cool down under the cooling of the heat dissipation pipe 39, causing the volume of the gas in the cavity to decrease, thereby attracting the lower piston plate 80 to move up under negative pressure, reducing the pressure of the base 1 under the negative pressure in the cavity, and thereby reducing the deformation of the base 1 under pressure.

Claims

1. An electromagnetic shielding and heat dissipation integrated ring main unit, comprising: Cabinet and base (1), the cabinet and base (1) are made of stainless steel plate, the inner cavity of the cabinet and the inner cavity of the base (1) are fixedly installed with a partition plate (2) between the positions, the inner cavity of the cabinet is an electrical cavity, and the inner cavity of the base (1) is a heat dissipation cavity, characterized in that the heat dissipation cavity is provided with a heat dissipation mechanism (3), and the heat dissipation mechanism (3) comprises: A partition (30) is fixedly installed at the middle position in the heat dissipation cavity, and the heat dissipation cavity is divided into left and right cavities by the partition (30); An upper piston plate (31) is sealingly and slidingly installed in the left and right cavities; A first electric cylinder (32) is used to drive the corresponding upper piston plate (31) to move up and down, the first electric cylinder (32) on the left is in a retracted state, the first electric cylinder (32) on the right is in an elongated state, and the electrical cavity and the heat dissipation cavity are filled with environment-friendly gas above the upper piston plate (31); The inside of the partition plate (2) is provided with a switching in-out gas mechanism, and the left and right cavities exchange in-gas and exhaust gas through the switching in-out gas mechanism; An environment-friendly gas vent hole is formed in the lower position of the side surface of the base (1), and the environment-friendly gas vent hole communicates the external environment with the space below the upper piston plate (31) in the heat dissipation cavity; The switching in-out gas mechanism comprises: A rotating disc (33) is sealingly and rotatably installed on the upper side of the partition plate (2); A first gas inlet one-way valve (34) is fixedly installed at the left position in the inside of the rotating disc (33); A first gas outlet one-way valve (35) is fixedly installed at the right position in the inside of the rotating disc (33); A main through hole (36) is longitudinally and vertically formed at the two positions in the inside of the partition plate (2), the environment-friendly gas in the electrical cavity enters the corresponding heat dissipation cavity through the first gas inlet one-way valve (34) and the corresponding position of the main through hole (36), and the corresponding heat dissipation cavity enters the electrical cavity through the main through hole (36) and the first gas outlet one-way valve (35); A first motor (37) is fixedly installed in the inside of the partition (30), and the output shaft of the first motor (37) penetrates through the partition plate (2) and is fixedly connected with the center position of the rotating disc (33); A supplement mechanism (8) is arranged in the left and right cavities below the upper piston plate (31), and the supplement mechanism (8) comprises: A lower piston plate (80) is sealingly and slidingly installed in the left and right cavities below the upper piston plate (31); An upper through hole (81) is longitudinally and vertically formed in the inside of the upper piston plate (31); The upper piston plate (31) and the lower piston plate (80) are fixedly connected through a first spring (83); The supplement mechanism (8) further comprises: A lower through hole (82) is longitudinally and vertically formed in the inside of the lower piston plate (80); A blocking block (85) is closed and inserted through the second spring (84) at the lower through hole (82); A contact rod (86) is fixedly installed at the position corresponding to the blocking block (85) on the bottom surface of the left and right cavities, and the environment-friendly gas vent hole communicates the external environment with the space below the lower piston plate (80) in the heat dissipation cavity; A blocking strip (87) is fixedly installed in the left and right cavities above the environment-friendly gas vent hole.

2. The ring main unit integrated with electromagnetic shielding and heat dissipation according to claim 1, characterized in that, The heat dissipation mechanism (3) further comprises: Liquid tank (38), sealed fixedly installed on both sides of the base (1), the liquid tank (38) on both sides is communicated by connecting pipe; The heat dissipation pipe (39) is communicated in the liquid tank (38), the heat dissipation pipe (39) extends into the cavity above the upper piston plate (31), the liquid tank (38) and the heat dissipation pipe (39) are filled with cooling liquid.

3. The ring main unit integrated with electromagnetic shielding and heat dissipation according to claim 2, characterized in that, The heat dissipation pipe (39) is divided into active pipe (390) and passive pipe (391), the active pipe (390) and the passive pipe (391) are sealed and slidably connected with the base (1), the screw rod (6) is rotatably installed in the right liquid tank (38), the screw rod (6) and the inner wall of the active pipe (390) are threadedly connected, the outer side of the liquid tank (38) is fixedly installed with the second motor (7), the output end of the second motor (7) is fixedly connected with the screw rod (6), the liquid tank (38) and the heat dissipation pipe (39) are filled with oil cooling liquid.

4. The ring main unit integrating electromagnetic shielding and heat dissipation according to claim 1, characterized in that, The temperature sensor (4) is fixedly installed on the upper side of the rotating disc (33), the detection needle of the temperature sensor (4) extends into the electrical cavity, the temperature sensor (4) is remotely electrically connected with the first electric cylinder (32) and the second motor (7).

5. The ring main unit integrated with electromagnetic shielding and heat dissipation according to claim 4, characterized in that, The extension plate (5) is fixedly installed above the rotating disc (33), the minimum distance value of the extension plate (5) to the rotating disc (33) is greater than the length value of the detection needle of the temperature sensor (4) and the length value of the one-way valve (34) and the one-way valve (35) extending into the electrical cavity.

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