A closed high-voltage switch cabinet with high ventilation and heat dissipation structure

Abstract

The present application discloses a closed high-voltage switch cabinet with a high ventilation and heat dissipation structure, which belongs to the technical field of switch cabinet equipment. It mainly includes a cabinet body, which has an air outlet and a return air outlet; a ventilation mechanism, which connects the air outlet and the return air outlet, and the ventilation mechanism includes an air inlet pipe, which is connected to the air outlet, and a pump body is arranged on the air inlet pipe; an air outlet pipe, which is connected to the return air outlet; a cooling mechanism, which is arranged between the air inlet pipe and the air outlet pipe, and the cooling mechanism includes a second bracket installed on the cabinet body, and a heat dissipation component is installed on the second bracket. The closed high-voltage switch cabinet with a high ventilation and heat dissipation structure of the present application can seal and self-circulate the hot air flow in the switch cabinet by providing a cooling mechanism, and in the circulation process of the hot air flow, contactless heat exchange is achieved by introducing cold air flow and hot air flow, thereby realizing the cooling of the switch cabinet.

Description

Technical Field

[0001] The present application relates to the technical field of switch cabinet equipment, and in particular to a closed high-voltage switch cabinet with a high ventilation and heat dissipation structure. Background Art

[0002] Switchgear is an electrical equipment whose main function is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and energy conversion in the power system. It is suitable for various occasions such as power plants, substations, petrochemicals, metallurgy and steel rolling, light industry and textiles, factories and mines, residential areas, high-rise buildings, etc. Switchgear can be divided into high-voltage switchgear, medium-voltage switchgear and low-voltage switchgear according to different voltage levels.

[0003] The high-voltage switchgear generates a lot of heat during operation because of its high voltage level, and a heat dissipation structure is required to cool the high-voltage switchgear;

[0004] For example, the patent with publication number CN213460803 U specifically discloses a heat dissipation structure for a high-voltage switch cabinet. The patent installs a horizontal heat dissipation pipe and a longitudinal heat dissipation pipe on both sides of the inner wall of the high-voltage switch cabinet, respectively, so that both sides of the inner wall of the high-voltage switch cabinet can be blown evenly, so that the heat dissipation uniformity is better. At the same time, the hot air inside the high-voltage switch cabinet is quickly discharged through the exhaust fan, which is convenient for rapid heat dissipation.

[0005] During the implementation of the above patent, because an exhaust fan is used for heat dissipation, the interior of the high-voltage switch cabinet is connected to the outside air, which makes the sealing of the high-voltage switch cabinet poor. The high-voltage switch cabinet has a high voltage inside and is more dangerous. When the staff approaches, the high voltage may cause harm to the staff through the position connected to the outside, especially when the air humidity is high, this danger will be further increased.

[0006] Therefore, it is necessary to provide a closed high-voltage switch cabinet with a high ventilation and heat dissipation structure to solve the above problems.

[0007] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0008] Based on the above problems existing in the prior art, the problem to be solved by the present application is to provide a closed high-voltage switch cabinet with a high ventilation and heat dissipation structure, so as to achieve insulation and sealing of the high-voltage switch cabinet while timely heat dissipation treatment thereof.

[0009] The technical solution adopted by the present application to solve its technical problem is: a closed high-voltage switch cabinet with a high ventilation and heat dissipation structure, including a cabinet body, the cabinet body has an air outlet and an air return port; a ventilation mechanism, the ventilation mechanism is connected to the air outlet and the air return port, the ventilation mechanism includes: an air inlet pipe, the air inlet pipe is connected to the air outlet, and a pump body is arranged on the air inlet pipe; an air outlet pipe, the air outlet pipe is connected to the air return port; a cooling mechanism, the cooling mechanism is arranged between the air inlet pipe and the air outlet pipe, the cooling mechanism includes a second bracket installed on the cabinet body, and a A heat dissipation component, the heat dissipation component includes an intermediate cylinder, a first through chamber is arranged inside the intermediate cylinder, an air duct is arranged in the first chamber; a first hot air duct, the first hot air duct is connected to the air inlet duct; a second hot air duct, the second hot air duct is connected to the air outlet duct; a first cold air duct, the first cold air duct is connected to the first chamber to guide the cold air into the first chamber; a second cold air duct, the second cold air duct is connected to the first chamber to guide the cold air out of the first chamber; the airflow in the cabinet is introduced into the air duct through the first hot air duct to exchange heat with the cold air in the first chamber.

[0010] Furthermore, the two ends of the intermediate tube are respectively covered with a front cover and a rear cover, and the front cover and the rear cover are both hollow and form a second chamber and a third chamber respectively;

[0011] A rear disc body is installed at the connection of the first chamber and the third chamber, and the rear disc body seals and isolates the first chamber and the third chamber. A partition is rotatably arranged on the rear cover, and the partition is in contact and sealed with the rear disc body. The partition divides the third chamber into two groups of chambers, namely an air inlet chamber and an air outlet chamber, and the air inlet chamber is connected to the first hot air duct.

[0012] Furthermore, a front disk body is installed at the connection between the first chamber and the second chamber, and a plurality of second through holes are provided on the front disk body, and a third through hole corresponding to the second through hole is provided on the rear disk body, and an air duct is passed between the second through hole and the third through hole, and one end of the air duct is connected to the air intake chamber.

[0013] Furthermore, the first cold air ducts are provided in a plurality of groups, and the plurality of groups of the first cold air ducts are evenly distributed along the length direction of the intermediate tube.

[0014] Furthermore, a first bracket is fixedly installed on the cabinet, and a motor is fixedly installed on the first bracket; a screw is fixedly installed between the front disk body and the rear disk body, one end of the screw rod passes through the front cover and is fixedly installed on the output end of the motor, and the screw rod and the front cover are installed with sealed bearings; the front disk body and the rear disk body are both installed with bearings on the inner ring of the intermediate cylinder.

[0015] Furthermore, a sealing disk is threadedly connected to the screw rod, and a first through hole is provided on the sealing disk for the air duct to pass through. A plurality of guide rods are fixedly installed between the front disk body and the rear disk body, and the sealing disk, the guide rods and the air duct are all sealed and slidably installed; the inner ring of the intermediate cylinder is provided with a thread groove, and the outer ring of the sealing disk is provided with an external thread matching the thread groove.

[0016] The beneficial effects of the present application are as follows: the enclosed high-voltage switch cabinet with a high ventilation and heat dissipation structure provided by the present application has the following beneficial effects:

[0017] 1. By providing a cooling mechanism, the hot air flow in the switch cabinet can be sealed and self-circulated, and during the circulation of the hot air flow, contactless heat exchange is achieved by introducing cold air flow and hot air flow, thereby achieving cooling of the switch cabinet.

[0018] 2. By providing a movable sealing disk, the contact area between the cold airflows can be effectively controlled, so as to adjust the cooling speed of the switch cabinet without adding additional cooling devices.

[0019] 3. By setting up a filter, impurities in the hot air circulation process can be effectively isolated, and when the filter is blocked, it can be self-cleaned by rotating.

[0020] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0022] In the attached picture:

[0023] Figure 1 This is an overall schematic diagram of a closed high-voltage switch cabinet with a high ventilation and heat dissipation structure in this application;

[0024] Figure 2 for Figure 1 Exploded schematic diagram of the overall structure;

[0025] Figure 3 for Figure 2 The structural diagram of the cooling mechanism;

[0026] Figure 4 for Figure 3 Schematic diagram of the local structure at A in the middle;

[0027] Figure 5for Figure 3 A schematic diagram of the structure of the heat dissipation component;

[0028] Figure 6 for Figure 5 Schematic diagram of the internal structure of the heat dissipation component;

[0029] Figure 7 for Figure 6 Schematic diagram of the exploded structure of the heat dissipation component;

[0030] Figure 8 for Figure 7 Schematic diagram of the local structure at B in the middle;

[0031] Fig. 9 for Figure 7 Schematic diagram of the local structure at C in the middle;

[0032] Fig.10 for Figure 7 Schematic diagram of the local structure at D in the middle;

[0033] Among them, the reference numerals in the figure are:

[0034] 1. Switch cabinet; 11. Cabinet body; 12. Top plate; 121. Air outlet; 13. Side plate; 131. Air return outlet;

[0035] 2. Ventilation mechanism; 21. Air inlet pipe; 22. Top sealing plate; 23. Side sealing plate; 24. Valve body; 25. Air outlet pipe; 26. Pump body; 27. Filter cartridge;

[0036] 3. Cooling mechanism; 31. First bracket; 32. Motor; 33. Second bracket;

[0037] 4. Heat dissipation assembly; 41. Intermediate cylinder; 42. Front cover; 43. Rear cover; 44. First cold air duct; 45. Second cold air duct; 46. First hot air duct; 47. Second hot air duct; 48. Air guide duct; 49. Front disk; 410. Guide rod; 411. Screw; 412. Sealing disk; 413. Rear disk; 414. Filter; 415. Partition; 416. Slot; 417. Filter hole; 418. Spring; 419. Column; 420. Socket; 421. First through hole; 491. Second through hole. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0040] Embodiment 1:

[0041] like Figure 1-Figure 2 As shown, the present application provides a closed high-voltage switchgear with a high ventilation and heat dissipation structure, including a switchgear 1, which is arranged in a power system, mainly for opening and closing, controlling and protecting electrical equipment in the process of power generation, transmission, distribution and power conversion of the power system;

[0042] The switch cabinet 1 includes a cabinet body 11, a top plate 12 is fixedly mounted on the top of the cabinet body 11, and a side plate 13 is fixedly mounted on the side of the cabinet body 11, and an air outlet 121 is arranged on the top plate 12, and the air outlet 121 is used to guide the hot air inside the cabinet body 11 out, and a return air outlet 131 is arranged on the side plate 13, and the return air outlet 131 is used to introduce cold air into the cabinet body 11;

[0043] At the same time, a ventilation mechanism 2 is connected between the air outlet 121 and the return air outlet 131. The ventilation mechanism 2 is used to guide the hot air discharged from the air outlet 121 into the return air outlet 131 after cooling. The ventilation mechanism 2 includes a top sealing plate 22 covering the air outlet 121 and a side sealing plate 23 covering the return air outlet 131. The top sealing plate 22 and the side sealing plate 23 are both made of insulating materials.

[0044] like Figure 3 As shown, an air inlet pipe 21 is connected to the top sealing plate 22, and the air inlet pipe 21 is communicated with the air outlet 121. At the same time, a pump body 26 is provided on the air inlet pipe 21, and the pump body 26 is fixed on the top plate 12 to extract the hot air in the cabinet 11;

[0045] At the same time, a valve body 24 is also provided on the air inlet pipe 21, and the valve body 24 is used to control the flow of hot air in the air inlet pipe 21, and a cooling mechanism 3 is connected to the air inlet pipe 21, and the cooling mechanism 3 cools the hot air in the air inlet pipe 21 by heat exchange;

[0046] In addition, an air outlet duct 25 is connected to the output end of the cooling mechanism 3, and one end of the air outlet duct 25 away from the cooling mechanism 3 is connected to the side sealing plate 23 to return the air cooled by the cooling mechanism 3 to the cabinet 11 through the return air port 131 to achieve air circulation and cooling.

[0047] Continue to refer Figure 3 The cooling mechanism 3 includes a second bracket 33 fixedly mounted on the top plate 12, and a heat dissipation component 4 is fixedly mounted on the second bracket 33;

[0048] like Figure 5-Figure 6 As shown, the heat dissipation assembly 4 includes an intermediate cylinder 41 fixedly mounted on the second bracket 33, and a through first chamber is arranged inside the intermediate cylinder 41. At the same time, a front cover 42 and a rear cover 43 are respectively covered at both ends of the intermediate cylinder 41. The front cover 42 and the rear cover 43 are also hollow and form a second chamber and a third chamber respectively.

[0049] At the same time, a first hot air pipe 46 is connected to the rear cover 43, and one end of the first hot air pipe 46 away from the rear cover 43 is connected to the air inlet pipe 21, so as to guide the hot air in the air inlet pipe 21 into the third chamber;

[0050] like Figure 7 and Fig.10 As shown, a rear plate 413 is installed at the connection between the first chamber and the third chamber, and the rear plate 413 seals and isolates the first chamber and the third chamber. At the same time, a partition 415 is rotatably arranged on the rear cover 43, and the partition 415 is in contact and sealed with the rear plate 413, so that the partition 415 divides the third chamber into two groups of chambers, namely, an air inlet chamber and an air outlet chamber, and the air inlet chamber is connected to the first hot air pipe 46, so that the hot air is introduced into the air inlet chamber through the first hot air pipe 46;

[0051] like Figure 7-Figure 8 As shown, a front plate 49 is installed at the connection between the first chamber and the second chamber, and a plurality of second through holes 491 are provided on the front plate 49. Meanwhile, a third through hole (not shown) corresponding to the second through hole 491 is provided on the rear plate 413, and a plurality of U-shaped air guides 48 (such as Figure 6 As shown), one end of the air guide 48 is connected to the air inlet chamber, and the other end is connected to the air outlet chamber, so that the hot air is introduced from the air inlet chamber into the air outlet chamber through the air guide 48;

[0052] like Figure 3 and Figure 5-Figure 6 As shown, a second hot air pipe 47 is connected to the rear cover 43, and the second hot air pipe 47 is connected to the air outlet chamber. At the same time, one end of the second hot air pipe 47 away from the rear cover 43 is connected to the air outlet pipe 25, so that the airflow in the air outlet chamber can be introduced into the air outlet pipe 25 through the second hot air pipe 47, and then flow back to the interior of the cabinet 11;

[0053] like Figure 5-Figure 6As shown, a plurality of first cold air ducts 44 connected to the first chamber are arranged on the intermediate tube 41, and the plurality of first cold air ducts 44 are evenly distributed along the length direction of the intermediate tube 41. At the same time, a second cold air duct 45 is arranged on the intermediate tube 41 near the front cover 42, and the second cold air duct 45 is connected to the first chamber, and the plurality of first cold air ducts 44 are all connected to the cold air source, so that the cold air at the cold air source can be introduced into the first chamber through the first cold air duct 44 and discharged from the second cold air duct 45;

[0054] In summary, when the switch cabinet 1 needs to be cooled, the pump body 26 is started to guide the hot air in the switch cabinet 1 from the air outlet 121, and enters the second chamber through the air inlet pipe 21 and the first hot air pipe 46, and then enters the third chamber through the air guide pipe 48, and flows back to the inside of the switch cabinet 1 through the second hot air pipe 47 and the return air port 131;

[0055] In the above process, the cold air from the cold air source is introduced into the first chamber from the first cold air duct 44. When the cold air is in the first chamber, the cold air exchanges heat with the hot air in the air duct 48, so that the hot air in the air duct 48 can be quickly cooled, thereby achieving the cooling operation of the switch cabinet 1.

[0056] In the above process, the air in the switch cabinet 1 flows in a closed loop and does not contact the outside world, thereby achieving sealed cooling. And because the power of the pump body 26 can be adjusted, the power of the pump body 26 can be increased to achieve sealed cooling and heat dissipation under high ventilation conditions.

[0057] Embodiment 2:

[0058] In the process of heat dissipation of the switch cabinet 1, the temperature of the switch cabinet 1 is constantly changing due to the continuous cooling. When the temperature of the switch cabinet 1 drops to a reasonable range, in order to save energy, it is generally necessary to control the temperature of the input cold air, that is, to increase the temperature of the input cold air, thereby reducing the cooling speed of the switch cabinet 1;

[0059] However, the temperature control method of the air conditioner usually requires an additional cooling device to adjust the temperature of the cooling medium, thereby increasing the cost of equipment and energy;

[0060] In order to solve the above problem, this embodiment describes a method for adjusting the contact area between the cold air and the air duct 48 to adjust the cooling speed of the gas in the air duct 48, specifically:

[0061] like Figure 1-Figure 3 As shown, a first bracket 31 is fixedly mounted on the top plate 12, and a motor 32 is fixedly mounted on the first bracket 31;

[0062] like Figure 8As shown, a screw 411 is fixedly installed between the front disk body 49 and the rear disk body 413, one end of the screw 411 passes through the front cover 42 and is fixedly installed with the output end of the motor 32. It should be noted that the screw 411 and the front cover 42 are installed with sealed bearings to prevent the gas in the first chamber from escaping;

[0063] In this embodiment, the front disc body 49 and the rear disc body 413 are both bearing-mounted on the inner ring of the intermediate cylinder 41, so that when the motor 32 rotates, the front disc body 49 and the rear disc body 413 can be driven to rotate synchronously through the screw 411;

[0064] like Fig. 9 As shown, a sealing plate 412 is threadedly connected to the screw rod 411, and a first through hole 421 is provided on the sealing plate 412 for the air guide 48 to pass through. At the same time, a plurality of guide rods 410 are fixedly installed between the front plate body 49 and the rear plate body 413, and the sealing plate 412, the guide rods 410 and the air guide 48 are all sealed and slidably installed;

[0065] At the same time, a thread groove (not shown in the figure) is provided on the inner ring of the intermediate cylinder 41, and an external thread matching the thread groove is provided on the outer ring of the sealing disk 412, so that when the motor 32 rotates, the screw 411 is driven to rotate, and then the sealing disk 412 is driven to rotate;

[0066] At this time, because the sealing disk 412 is matched with the inner thread of the intermediate cylinder 41, the sealing disk 412 will spiral along the thread groove, so that the sealing disk 412 moves along the length direction of the screw rod 411. It should be noted that the pitch of the screw rod 411 is the same as the pitch of the thread groove, so that the sealing disk 412 can slide along the screw rod 411 while rotating;

[0067] In summary, when the contact area between the cold air and the air duct 48 needs to be adjusted, the motor 32 is started to drive the screw 411 to rotate, thereby driving the sealing plate 412 to slide on the screw 411. When the sealing plate 412 is close to the rear plate 413, the contact area between the cold air and the air duct 48 is the largest, and when the sealing plate 412 is close to the front plate 49, the contact area between the cold air and the air duct 48 is the smallest.

[0068] It should be noted that cooling valves (not shown in the figure) are provided on multiple groups of first cold air ducts 44, and the cooling valves are used to control the opening and closing of the first cold air ducts 44, so that when the sealing disk 412 moves from a position close to the rear disk body 413 to a position close to the front disk body 49, the first cold air ducts 44 passed by the sealing disk 412 are all closed, so that the contact area between the cold air and the air duct 48 can be effectively controlled to achieve the purpose of adjusting the cooling speed of the switch cabinet 1.

[0069] Embodiment three:

[0070] During the flow of gas in the switch cabinet 1, the gas will contact different positions in the switch cabinet 1, so that impurities will inevitably be carried in the air flow. When the gas carrying impurities flows through the air duct 48 with a smaller diameter, the air duct 48 may be blocked.

[0071] In order to solve the above problems, this embodiment provides a filtering device, specifically:

[0072] like Figure 7 and Fig.10 As shown, a step (not shown in the figure) is provided on the partition 415, and a spring 418 is fixedly installed on the step. A filter screen 414 is fixedly installed at a position of the spring 418 away from the step. The outer frame size of the filter screen 414 is the same as that of the rear disk 413 and matches the third chamber, and a plurality of groups of filter holes 417 are provided on the filter screen 414, so that the airflow can only enter the air duct 48 from the filter holes 417, and the airflow out of the air duct 48 can only flow back through the filter holes 417, thereby achieving the effect of filtering the airflow to prevent impurities from returning to the switch cabinet 1;

[0073] At the same time, a slot 416 is provided on the filter 414, and the slot 416 matches the partition 415, so that the partition 415 can pass through the filter 414. It can be understood that due to the presence of the spring 418, the filter 414 can move in a direction close to or away from the rear plate 413;

[0074] A column 419 is fixedly mounted on the rear disc 413, and a plug hole 420 matching the column 419 is provided on the filter 414. The column 419 is suitable for being inserted into the plug hole 420, so that the rear disc 413 and the filter 414 are connected;

[0075] In summary, when the switch cabinet 1 is cooled normally, the airflow enters the air duct 48 through half of the filter holes 417 (hereinafter referred to as the first filter holes) of the filter screen 414, and the airflow out of the air duct 48 flows back through the other half of the filter holes 417 (hereinafter referred to as the second filter holes);

[0076] When there are many impurities in the airflow, the first filter hole will be blocked. In the initial state, under the action of the spring 418, the filter 414 is far away from the rear disc 413. When the first filter hole is blocked, the airflow cannot pass through the filter 414, so the filter 414 is moved closer to the rear disc 413 under the influence of the airflow, and the spring 418 is compressed to the limit position.

[0077] At this time, the filter screen 414 is located close to the rear plate 413, and the column 419 extends into the insertion hole 420, so that the filter screen 414 and the rear plate 413 are connected;

[0078] Then, the motor 32 is started and rotated 360°. When the motor 32 rotates, the screw 411 is driven to rotate synchronously, and then the rear disc 413 is driven to rotate synchronously. At this time, because the filter screen 414 is connected to the rear disc 413, the filter screen 414 is rotated synchronously, so that the positions of the first filter hole and the second filter hole are interchanged.

[0079] It should be understood that when the filter 414 rotates, the partition 415 will rotate synchronously, so as not to affect the partition effect of the partition 415;

[0080] When the positions of the first filter hole and the second filter hole are interchanged, the airflow will be quickly introduced into the air duct 48 due to the unobstructed flow of the second filter hole, and the first filter hole will be blown from the reverse side, so that the impurities adhering to the first filter hole are blown off, thereby achieving the effect of automatic clearing.

[0081] like Figure 3-Figure 4 As shown, a filter cartridge 27 is connected to the air outlet pipe 25, and the filter cartridge 27 can block the impurities blown off the first filter hole to prevent the impurities from returning to the switch cabinet 1, and the filter cartridge 27 is easy to disassemble, so that when the switch cabinet 1 is idle, the filter cartridge 27 can be disassembled for cleaning and replacement.

[0082] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A closed high-voltage switchgear with a high ventilation and heat dissipation structure, characterized in that: include: A cabinet (11), the cabinet (11) having an air outlet (121) and an air return outlet (131); A ventilation mechanism (2), the ventilation mechanism (2) being connected to the air outlet (121) and the air return outlet (131), the ventilation mechanism (2) comprising: an air inlet pipe (21), the air inlet pipe (21) being in communication with the air outlet (121), and a pump body (26) being disposed on the air inlet pipe (21); An air outlet pipe (25), the air outlet pipe (25) being in communication with the air return port (131); A cooling mechanism (3), the cooling mechanism (3) being arranged between the air inlet pipe (21) and the air outlet pipe (25), the cooling mechanism (3) comprising a second bracket (33) mounted on the cabinet (11), a heat dissipation component (4) being mounted on the second bracket (33), the heat dissipation component (4) comprising: An intermediate cylinder (41), wherein a first through chamber is provided inside the intermediate cylinder (41), and an air guide pipe (48) is provided inside the first chamber; It also includes a first hot air pipe (46), the first hot air pipe (46) being in communication with the air inlet pipe (21); a second hot air pipe (47), the second hot air pipe (47) being in communication with the air outlet pipe (25); A first cold air pipe (44), the first cold air pipe (44) being in communication with the first chamber so as to guide cold air into the first chamber; a second cold air pipe (45), the second cold air pipe (45) being in communication with the first chamber so as to guide the cold air out of the first chamber; Wherein: the airflow in the cabinet (11) is introduced into the air guide duct (48) through the first hot air duct (46) to perform heat exchange with the cold air in the first chamber; The two ends of the intermediate cylinder (41) are respectively covered with a front cover (42) and a rear cover (43), wherein the front cover (42) and the rear cover (43) are both hollow and form a second chamber and a third chamber respectively; A rear disc (413) is installed at the connection between the first chamber and the third chamber, and the rear disc (413) seals and isolates the first chamber and the third chamber. A partition (415) is rotatably arranged on the rear cover (43), and the partition (415) is in contact and sealed with the rear disc (413). The partition (415) divides the third chamber into two groups of chambers, namely an air inlet chamber and an air outlet chamber, and the air inlet chamber is connected to the first hot air pipe (46).

2. A closed high-voltage switch cabinet with a high ventilation and heat dissipation structure according to claim 1, characterized in that: A front disk body (49) is installed at the connection between the first chamber and the second chamber, and a plurality of groups of second through holes (491) are provided on the front disk body (49), and a third through hole corresponding to the second through hole (491) is provided on the rear disk body (413), and an air duct (48) is passed between the second through hole (491) and the third through hole, and one end of the air duct (48) is connected to the air intake chamber.

3. A closed high-voltage switch cabinet with a high ventilation and heat dissipation structure according to claim 2, characterized in that: The first cold air pipes (44) are provided in multiple groups, and the multiple groups of the first cold air pipes (44) are evenly distributed along the length direction of the intermediate tube (41).

4. A closed high-voltage switch cabinet with a high ventilation and heat dissipation structure according to claim 3, characterized in that: A first bracket (31) is fixedly mounted on the cabinet (11), and a motor (32) is fixedly mounted on the first bracket (31).

5. A closed high-voltage switch cabinet with a high ventilation and heat dissipation structure according to claim 4, characterized in that: A screw rod (411) is fixedly installed between the front disk body (49) and the rear disk body (413), one end of the screw rod (411) passes through the front cover (42) and is fixedly installed with the output end of the motor (32), and the screw rod (411) and the front cover (42) are installed in a sealed bearing; The front disc body (49) and the rear disc body (413) are both bearing-mounted on the inner ring of the intermediate cylinder (41).

6. A closed high-voltage switch cabinet with a high ventilation and heat dissipation structure according to claim 5, characterized in that: A sealing disk (412) is threadedly connected to the screw rod (411), and a first through hole (421) is provided on the sealing disk (412) for the air guide pipe (48) to pass through. A plurality of guide rods (410) are fixedly installed between the front disk body (49) and the rear disk body (413), and the sealing disk (412), the guide rods (410) and the air guide pipe (48) are all sealed and slidably installed.

7. A closed high-voltage switch cabinet with a high ventilation and heat dissipation structure according to claim 6, characterized in that: The inner ring of the intermediate cylinder (41) is provided with a thread groove, and the outer ring of the sealing disk (412) is provided with an external thread matching the thread groove.

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