Air-insulated high-voltage switch cabinet for high altitude

Abstract

The invention relates to the technical field of switch cabinets, and discloses an air-insulated high-voltage switch cabinet for high altitude, which comprises a box body, the top of the box body is provided with an air pumping mechanism, and the box body is internally provided with a connecting switch, a circuit breaker and a lightning arrester; the air purification mechanism comprises dust removal boxes, the dust removal boxes are arranged into two groups which are symmetrically distributed in the left-right direction and located on the left side and the right side of the bottom of the inner wall of the box body correspondingly, and the contact faces of the dust removal boxes and the box body are both provided with through type air inlets and dust discharge ports; and the top of the inner wall of the dust removal box is fixedly connected with two groups of fixed plates. According to the device, the high interception rate of dust is realized, then the dust collection area of the cathode plate is increased by utilizing the vortex line design of the cathode plate and the anode plate, and compared with the traditional physical filtration, the effective action area of the cathode plate is increased by geometric multiples, so that the dust removal and dust interception capabilities of the device are greatly enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of switchgear, and in particular to an air-insulated high-voltage switchgear for use at high altitudes. Background Art

[0002] Air-insulated high-voltage switchgear is a common type of electrical equipment. Its interior primarily consists of circuit breakers and is used for connecting various electrical devices, generating power, transmitting, distributing power, and converting electrical energy. Essentially, it is a high-power switch. Its interior is not completely sealed, but rather uses fans to circulate air inside and outside to dissipate heat. Compared to gas-insulated switchgear, air-insulated high-voltage switchgear offers the advantages of low cost and ease of maintenance. The biggest problem with air-insulated high-voltage switchgear in the prior art is dust accumulation caused by circulating ventilation. Existing solutions are overly conventional: centered around filters and structurally improving them to continuously improve the filtration efficiency of fixed dust. However, the resulting hassles of cleaning and restoring filtration capacity have long plagued the field. Due to the sealed nature of the switchgear, replacing filter components is unnecessary. The single air circulation path in the prior art also makes backflushing the filter components impossible, limiting their efficiency. The physical cleaning mechanisms involved significantly increase the complexity of the device, failing to improve efficiency and reducing reliability due to the structural complexity. Summary of the Invention

[0003] The present application proposes an air-insulated high-voltage switchgear for use at high altitudes, which has the advantages of high dust adsorption efficiency and easy cleaning, and is used to solve the problems of low filtration efficiency and inconvenient cleaning in the prior art.

[0004] To achieve the above objectives, the present application adopts the following technical solution: an air-insulated high-voltage switchgear for high altitudes, comprising:

[0005] A box body, wherein an air pumping mechanism is installed on the top of the box body, and a connecting switch, a circuit breaker and a lightning arrester are installed inside the box body;

[0006] The air purification mechanism includes a dust collection box, the dust collection box is arranged into two groups symmetrically distributed on the left and right, and are respectively located on the left and right sides of the bottom of the inner wall of the box, the contact surface between the dust collection box and the box body is provided with a through-type air inlet and dust discharge port, the top of the inner wall of the dust collection box is fixedly connected with two groups of fixing plates, anode plates and cathode plates equidistantly distributed around each other are fixedly connected between the two groups of fixing plates, a power supply is installed on the outside of the box body, and the power supply is electrically connected to the anode plate and the cathode plate respectively, and two groups of guide rings are fixedly installed on the middle of the inner wall of the dust collection box, and the guide ring is located below the fixed plate;

[0007] The air pumping mechanism includes an air storage ring and a fan fixedly mounted on the top of the box body. Four sets of guide cylinders are fixedly mounted on the top of the box body. Guide columns are adapted to be plugged into the interior of the guide cylinders. A sealing plate is fixedly connected to the top of the guide column. The sealing plate abuts against the top of the fan. A hose is fixedly connected between the top of the sealing plate and the air storage ring.

[0008] Preferably, the connecting switch, circuit breaker and lightning arrester are respectively installed on the inner wall of the box in order from top to bottom, and three groups of sealed doors are hinged on the front of the box, and the three groups of sealed doors correspond to the connecting switch, circuit breaker and lightning arrester respectively.

[0009] Preferably, the air storage ring is an annular cavity, the sealing plate is made of plastic, a rubber layer is glued to the bottom of the sealing plate, and abuts against the top of the fan to form a seal.

[0010] Preferably, multiple groups of fixed columns are fixedly connected between the bottom of the inner wall of the dust removal box and the fixed plate, the outer surface of the fixed column is movably sleeved with a spring and a dust guide plate, the top of the dust guide plate is fixedly connected with a connecting ring, the top of the connecting ring is fixedly connected to the movable bar, the inside of the fixed plate is fixedly installed with a telescopic rod, the telescopic end of the telescopic rod is fixedly connected to the movable bar, the top of the movable bar is fixedly connected with a connecting bar, the connecting bar passes upward through the guide ring, the anode plate and the cathode plate in sequence and is fixedly connected to a cleaning bar, and the two ends of the spring are elastically connected to the fixed plate and the movable bar respectively.

[0011] Preferably, the cleaning strips are provided in two groups, one inside the other, and the other inside the cleaning strips are made of rubber blocks, and the inner wall of the cleaning strips is in interference fit with the surface of the cathode plate.

[0012] Preferably, the air inlet is located above the ash discharge port, and the dust guide plate is located below the air inlet.

[0013] Preferably, a sealing gasket is glued to the bottom of the dust guide plate, and the sealing gasket is made of a rubber block and has an interference fit with the inner wall of the dust removal box.

[0014] Preferably, the dust guide plate is distributed as a whole in an inclined manner toward the air inlet, and the side of the dust guide plate surface close to the air inlet is shorter than the side away from the air inlet.

[0015] Preferably, when the dust guide plate moves downward to the lowest point, the bottom of the cleaning strip is flush with the bottom of the cathode plate, and the top of the dust guide plate is located below the bottom of the ash discharge port.

[0016] Preferably, the gap between the anode plate and the cathode plate and its size are equal to the gap formed between the two groups of guide rings and their size, and the guide rings are made of stainless steel.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. This device adopts a high-contact-area electrostatic dust collection method, which achieves a significantly improved interception rate of dust in the air and can significantly avoid the amount of dust adhering to the surface of electrical components inside the device. This device is equipped with two sets of air purification mechanisms on the left and right sides of its interior, and is responsible for air intake. When the air pumping mechanism starts to pump air upward, the outside air near the air inlet is sucked in, and the power supply is used to make the anode plate and cathode plate designed with a vortex line structure surround each other, forming an electric field with a vortex line area distribution, which adsorbs solid particles in the air on the surface of the cathode plate, thereby achieving a high dust interception rate. Then, the vortex line design of the cathode plate and the anode plate is used to increase the dust collection area of the cathode plate. Compared with traditional physical filtration, its effective action area increases geometrically, thereby greatly enhancing the dust removal and dust interception capabilities of the device.

[0019] 2. This device also makes a simple optimization on the air pumping mechanism, making it an upgraded one-way valve structure. The sealing plate is abutted against the top of the fan. When the fan discharges the gas inside the device upward, the sealing plate can be opened and a part of the air purified by the air purification mechanism is stored into the inner cavity of the air storage ring through the hose. When the air purification mechanism needs to be cleaned and the dust collection capacity is restored, the negative pressure suction of the fan on the sealing plate and the dead weight of the sealing plate are used to make the sealing plate firmly abut against the top of the fan and seal it, so as to prevent the outside air from entering the device without being purified. At the same time, it is connected through the hose to make the storage The air inside the air storage ring can be sucked into the inner cavity of the box by the fan, maintaining the air pressure balance and generating positive pressure on the inner cavity of the box. The positive pressure airflow rushes downward over the surface of the cathode plate, and rushes the dust downward to the upper surface of the dust guide plate. The telescopic rod is then used to drive the moving strip, connecting strip, cleaning strip and dust guide plate downward, so that the cleaning strip can scrape off the remaining dust on the surface of the cathode plate, and further blow and clean it with the positive pressure airflow. When the dust guide plate moves to the bottom of the ash discharge port, the dust on the upper surface of the sealing gasket is automatically discharged downward out of the ash discharge port, realizing the automatic cleaning function of the air purification mechanism, which greatly improves the practicality and maintainability of the device.

[0020] 3. This device also installs two sets of identical guide rings below the anode plate and cathode plate. The purpose is to form a gap between the two sets of guide rings and the anode plate and cathode plate, so that the airflow entering downward between the anode plate and cathode plate can be evenly distributed, so that the speed of absorbing dust solid particles at various positions on the surface of the cathode plate is the same, thereby extending the overall working service life of the cathode plate and synchronizing the dust adsorption capacity at various positions of the cathode plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application in a clear and understandable manner.

[0022] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0023] Figure 1 Schematic diagram of the internal structure of the box of the present invention;

[0024] Figure 2 This is a schematic diagram of the front appearance of the box of the present invention;

[0025] Figure 3 It is a front cutaway schematic diagram of the box body of the present invention;

[0026] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at center A;

[0027] Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure at B in the middle;

[0028] Figure 6 Schematic diagram of the internal structure of the air purification mechanism of the present invention;

[0029] Figure 7 Schematic diagram of the separation of the air purification mechanism of the present invention;

[0030] Figure 8 Schematic diagram of the top view of the air purification mechanism of the present invention;

[0031] Figure 9 It is a partial separation schematic diagram of the air purification mechanism of the present invention;

[0032] Figure 10 It is a top view schematic cross-sectional view of the air purification mechanism of the present invention.

[0033] Among them: 1. Box body; 2. Sealing door; 3. Air inlet; 4. Ash discharge port; 5. Air pumping mechanism; 51. Air storage ring; 52. Fan; 53. Guide cylinder; 54. Guide column; 55. Sealing plate; 56. Hose; 6. Air purification mechanism; 61. Dust removal box; 62. Power supply; 63. Fixed plate; 64. Anode plate; 65. Cathode plate; 66. Telescopic rod; 67. Moving bar; 68. Cleaning bar; 69. Guide ring; 610. Fixed column; 611. Spring; 612. Dust guide plate; 613. Sealing gasket; 614. Connecting bar; 615. Connecting ring; 7. Connecting switch; 8. Circuit breaker; 9. Lightning arrester. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] See also Figures 1-10 This embodiment discloses an air-insulated high-voltage switchgear for high altitudes, comprising:

[0036] Box 1, an air pumping mechanism 5 is installed on the top of the box 1, and a connecting switch 7, a circuit breaker 8 and a lightning arrester 9 are installed inside the box 1;

[0037] The air purification mechanism 6 includes a dust removal box 61. The dust removal box 61 is provided with two groups symmetrically distributed on the left and right sides, and is respectively located on the left and right sides of the bottom of the inner wall of the box body 1. The contact surface between the dust removal box 61 and the box body 1 is provided with a through-type air inlet 3 and an ash discharge port 4. Two groups of fixed plates 63 are fixedly connected to the top of the inner wall of the dust removal box 61. Anode plates 64 and cathode plates 65 that are equidistantly distributed around each other are fixedly connected between the two groups of fixed plates 63. A power supply 62 is installed on the outside of the box body 1. The power supply 62 is electrically connected to the anode plate 64 and the cathode plate 65 respectively. Two groups of guide rings 69 are fixedly installed in the middle of the inner wall of the dust removal box 61. The guide ring 69 is located below the fixed plate 63;

[0038] The air pumping mechanism 5 includes an air storage ring 51 and a fan 52 fixedly mounted on the top of the box body 1. Four sets of guide cylinders 53 are fixedly mounted on the top of the box body 1. Guide columns 54 are adapted to be inserted into the interior of the guide cylinders 53. The top of the guide columns 54 is fixedly connected to a sealing plate 55. The sealing plate 55 abuts against the top of the fan 52. A hose 56 is fixedly connected between the top of the sealing plate 55 and the air storage ring 51.

[0039] This device adopts a high-contact-area electrostatic dust collection method, which achieves a significantly improved interception rate of dust in the air and can significantly avoid the amount of dust adhering to the surface of electrical components inside the device. This device is equipped with two sets of air purification mechanisms 6 on the left and right sides of its interior, and is responsible for air intake. When the air pumping mechanism 5 starts to pump air upward, the outside air near the air inlet 3 is sucked in, and the power supply 62 is used to power the anode plate 64 and the cathode plate 65 designed with a spiral line structure to surround each other, forming an electric field with a spiral linear area distribution, which adsorbs solid particles in the air on the surface of the cathode plate 65, thereby achieving a high dust interception rate. Then, the spiral line design of the cathode plate 65 and the anode plate 64 is used to increase the dust collection area of the cathode plate 65. Compared with traditional physical filtration, its effective action area increases geometrically, thereby greatly enhancing the dust removal and dust interception capabilities of the device.

[0040] The present invention also makes a simple optimization to the air pumping mechanism 5, making it an upgraded one-way valve structure, using the sealing plate 55 to abut against the top of the fan 52, so that when the fan 52 discharges the gas inside the device upward, the sealing plate 55 can be opened, and a part of the air purified by the air purification mechanism 6 is stored into the inner cavity of the air storage ring 51 through the hose 56. When the air purification mechanism 6 needs to be cleaned and the dust collection capacity is restored, the negative pressure suction force of the fan 52 on the sealing plate 55 and the dead weight of the sealing plate 55 are used to make the sealing plate 55 firmly abut against and seal against the top of the fan 52, so as to prevent the outside air from entering the interior of the device without being purified. At the same time, it is connected through the hose 56, so that the air stored in the air storage ring 51 can be discharged. The internal air can be sucked into the inner cavity of the box body 1 by the fan 52, maintaining the air pressure balance and generating positive pressure on the inner cavity of the box body 1. The positive pressure airflow rushes downward over the surface of the cathode plate 65, and rushes the dust downward to the upper surface of the dust guide plate 612. The telescopic rod 66 is then used to drive the moving bar 67, the connecting bar 614, the cleaning bar 68 and the dust guide plate 612 downward, so that the cleaning bar 68 scrapes off the remaining dust on the surface of the cathode plate 65, and further blows and cleans it with the positive pressure airflow. When the dust guide plate 612 moves to the bottom of the ash discharge port 4, the dust on the upper surface of the sealing gasket 613 is automatically discharged downward from the ash discharge port 4, realizing the automatic cleaning function of the air purification mechanism 6, which greatly improves the practicality and maintainability of the device.

[0041] Among them, the connection switch 7, the circuit breaker 8 and the lightning arrester 9 are respectively installed on the inner wall of the box body 1 in order from top to bottom. The front of the box body 1 is hinged with three sets of sealed doors 2, and the three sets of sealed doors 2 correspond to the connection switch 7, the circuit breaker 8 and the lightning arrester 9 respectively;

[0042] The circuit breaker 8, as the core structure of the device, is responsible for circuit switching and overload protection. The three sets of sealed doors 2 can be opened and closed separately, which is convenient for maintenance personnel to check.

[0043] The air storage ring 51 is an annular cavity, and the sealing plate 55 is made of plastic. A rubber layer is glued to the bottom of the sealing plate 55, and the sealing plate 55 is sealed by contacting the top of the fan 52.

[0044] The air storage ring 51 can absorb and store the hot air inside the device discharged upward from the fan 52 through the hose 56. When the fan 52 blows back, the air stored in the inner cavity of the box body 1 can flow downward with the fan 52 to maintain air pressure balance.

[0045] Among them, multiple groups of fixed columns 610 are fixedly connected between the bottom of the inner wall of the dust removal box 61 and the fixed plate 63, and the outer surface of the fixed column 610 is movably sleeved with a spring 611 and a dust guide plate 612, and the top of the dust guide plate 612 is fixedly connected with a connecting ring 615, and the top of the connecting ring 615 is fixedly connected to the movable bar 67. A telescopic rod 66 is fixedly installed inside the fixed plate 63, and the telescopic end of the telescopic rod 66 is fixedly connected to the movable bar 67. The top of the movable bar 67 is fixedly connected with a connecting bar 614, which passes upward through the guide ring 69, the anode plate 64 and the cathode plate 65 in sequence and is fixedly connected to the cleaning bar 68. The two ends of the spring 611 are elastically connected to the fixed plate 63 and the movable bar 67 respectively;

[0046] The fixed column 610 is used to guide and support the dust guide plate 612. When the movable bar 67 is pushed downward by the telescopic rod 66, the spring 611 will be stretched to provide a buffer for the movable bar 67 as a whole. The connecting bar 614 is used to connect the cleaning bar 68 and the movable bar 67 of the cleaning cathode plate 65, so that the cleaning bar 68 can move downward with the movable bar 67 and the dust guide plate 612.

[0047] The cleaning strips 68 are provided in two groups, the inner and outer surrounding groups, and the cleaning strips 68 are made of rubber blocks. The inner wall of the cleaning strips 68 is interference fit with the surface of the cathode plate 65.

[0048] The cleaning strip 68 is responsible for pressing against the surface of the cathode plate 65 and scraping off the dust and impurities remaining on the surface of the cathode plate 65 .

[0049] The air inlet 3 is located above the dust outlet 4, and the dust guide plate 612 is located below the air inlet 3;

[0050] The air inlet 3 is used to provide air intake for the device. When the fan 52 starts working, fresh air from the outside enters the device. During the cleaning stage, the dust guide plate 612 moves downward to the lowest point, so that the dust can be discharged along the dust discharge port 4 without affecting the air intake function of the air inlet 3.

[0051] The bottom of the dust guide plate 612 is glued with a sealing gasket 613, which is made of a rubber block and has an interference fit with the inner wall of the dust removal box 61;

[0052] The sealing gasket 613 is responsible for sealing between the dust guide plate 612 and the inner wall of the dust removal box 61 , so that the dust discharge port 4 and the air inlet 3 can be completely sealed and isolated by the dust guide plate 612 and the sealing gasket 613 .

[0053] The dust guide plate 612 is tilted toward the air inlet 3, and the side of the dust guide plate 612 close to the air inlet 3 is shorter than the side away from the air inlet 3.

[0054] The surface of the dust guide plate 612 is inclined toward one side of the air inlet 3 and the ash discharge port 4, so that the dust falling on the upper surface of the dust guide plate 612 can be automatically discharged along the ash discharge port 4.

[0055] When the dust guide plate 612 moves downward to the lowest point, the bottom of the cleaning strip 68 is flush with the bottom of the cathode plate 65, and the top of the dust guide plate 612 is located below the bottom of the ash outlet 4;

[0056] When the dust guide plate 612 drops to the lowest point, it is just below the ash discharge port 4. At this time, the downward positive pressure airflow from the fan 52 just helps the dust on the upper surface of the dust guide plate 612 to be automatically discharged along the ash discharge port 4.

[0057] The gap between the anode plate 64 and the cathode plate 65 and its size are equal to the gap between the two sets of guide rings 69 and their sizes. The guide rings 69 are made of stainless steel.

[0058] The device also installs two identical sets of guide rings 69 below the anode plate 64 and the cathode plate 65. The purpose is to form a gap between the two sets of guide rings 69 and the anode plate 64 and the cathode plate 65, so that the airflow entering downward between the anode plate 64 and the cathode plate 65 can be evenly distributed, so that the speed of absorbing dust and solid particles at various positions on the surface of the cathode plate 65 is the same, thereby maintaining the overall working service life of the cathode plate 65 and synchronizing the dust adsorption capacity of various positions on the cathode plate 65.

[0059] Working principle:

[0060] When the device is working, the circuit breaker 8 controls the switching and overload protection of the electrical equipment connected to the device. As the device works for a longer time, heat begins to be generated inside the device;

[0061] At this time, the air pumping mechanism 5 is first turned on, and the fan 52 is used to generate upward air suction, and a negative pressure is generated inside the device and the dust removal box 61. The outside air enters the inner cavity of the dust removal box 61 along the air inlet 3, as shown in FIG. Figure 5 As shown, the sealing plate 55 moves upward after receiving the positive pressure from the fan 52 and opens the gap with the top opening of the fan 52. At the same time, a portion of the gas enters the gas storage ring 51 along the hose 56. When the inner cavity of the gas storage ring 51 is full, the gas exhausted from the device escapes through the gap between the fan 52 and the sealing plate 55.

[0062] Then, the power supply 62 energizes the anode plate 64 and the cathode plate 65, so that an electric field is formed between the anode plate 64 and the cathode plate 65. Figure 4 、 Figure 7 and Figure 10As shown, after the outside air enters the dust removal box 61 through the air inlet 3, it is guided upward by the guide ring 69 to form a uniform vortex-shaped airflow, and then evenly enters between the anode plate 64 and the cathode plate 65. At this time, the dust such as fixed small particles in the air are adsorbed on the surface of the cathode plate 65. The air after adsorption and purification enters the inner cavity of the box body 1 upward, exchanges heat with the air in the inner cavity of the box body 1, and takes away the heat generated by the connection switch 7, circuit breaker 8 and lightning arrester 9;

[0063] Then, when there is a lot of dust attached to the surface of the cathode plate 65, the power supply 62 is turned off, the power between the anode plate 64 and the cathode plate 65 is cut off, and the fan 52 is controlled to blow back. At this time, the sealing plate 55 is firmly against the top of the fan 52 by the negative pressure adsorption and the downward force of its own gravity, preventing the outside air from directly passing through the fan 52 and entering the interior of the device. The air stored in the air storage ring 51 in advance can be input downward into the interior of the device by the fan 52. Then, the clean air passes downward along the top of the dust removal box 61 between the anode plate 64 and the cathode plate 65, causing the dust on the surface of the cathode plate 65 to fall to the upper surface of the dust guide plate 612;

[0064] Finally, start the telescopic rod 66 and drive the moving bar 67, cleaning bar 68, dust guide plate 612 and sealing gasket 613 downward. The cleaning bar 68 will scrape off the residual dust on the surface of the cathode plate 65. When the dust guide plate 612 moves to the lowest point, the dust is automatically discharged along the ash discharge port 4. The telescopic rod 66 then drives the moving bar 67, cleaning bar 68, dust guide plate 612 and sealing gasket 613 to reset upward.

[0065] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An air-insulated high-voltage switchgear for high altitudes, characterized in that: include: A box (1), an air pumping mechanism (5) is installed on the top of the box (1), and a connecting switch (7), a circuit breaker (8) and a lightning arrester (9) are installed inside the box (1); An air purification mechanism (6), the air purification mechanism (6) includes a dust removal box (61), the dust removal box (61) is set as two groups symmetrically distributed on the left and right sides, and is respectively located on the left and right sides of the bottom of the inner wall of the box body (1), the contact surface between the dust removal box (61) and the box body (1) is provided with a through-type air inlet (3) and an ash discharge port (4), the top of the inner wall of the dust removal box (61) is fixedly connected with two groups of fixed plates (63), and the two groups of fixed plates (63) are fixedly connected with anode plates (64) and cathode plates (65) that are equidistantly distributed around each other, a power supply (62) is installed on the outside of the box body (1), and the power supply (62) is electrically connected to the anode plates (64) and the cathode plates (65) respectively, and two groups of guide rings (69) are fixedly installed in the middle of the inner wall of the dust removal box (61), and the guide rings (69) are located below the fixed plates (63); The air pumping mechanism (5) comprises an air storage ring (51) and a fan (52) fixedly mounted on the top of the box (1); four groups of guide cylinders (53) are fixedly mounted on the top of the box (1); guide columns (54) are adapted and plugged into the interior of the guide cylinders (53); a sealing plate (55) is fixedly connected to the top of the guide column (54); the sealing plate (55) abuts against the top of the fan (52); and a hose (56) is fixedly connected between the top of the sealing plate (55) and the air storage ring (51).

2. The air-insulated high-voltage switchgear for high altitude according to claim 1, characterized in that: The connecting switch (7), the circuit breaker (8) and the lightning arrester (9) are respectively installed on the inner wall of the box (1) in order from top to bottom. The front of the box (1) is hinged with three groups of sealing doors (2), and the three groups of sealing doors (2) correspond to the connecting switch (7), the circuit breaker (8) and the lightning arrester (9), respectively.

3. The air-insulated high-voltage switchgear for high altitude according to claim 1, characterized in that: The air storage ring (51) is an annular cavity, the sealing plate (55) is made of plastic, a rubber layer is glued to the bottom of the sealing plate (55), and the sealing plate (55) is abutted with the top of the fan (52) to form a seal.

4. The air-insulated high-voltage switchgear for high altitude according to claim 3, characterized in that: A plurality of fixed columns (610) are fixedly connected between the bottom of the inner wall of the dust removal box (61) and the fixed plate (63); a spring (611) and a dust guide plate (612) are movably sleeved on the outer surface of the fixed column (610); a connecting ring (615) is fixedly connected to the top of the dust guide plate (612); a top of the connecting ring (615) is fixedly connected to the movable bar (67); a telescopic rod (66) is fixedly installed inside the fixed plate (63); a telescopic end of the telescopic rod (66) is fixedly connected to the movable bar (67); a connecting bar (614) is fixedly connected to the top of the movable bar (67); the connecting bar (614) passes upward through the guide ring (69), the anode plate (64) and the cathode plate (65) in sequence and is fixedly connected to the cleaning bar (68); and the two ends of the spring (611) are elastically connected to the fixed plate (63) and the movable bar (67) respectively.

5. The air-insulated high-voltage switchgear for high altitude according to claim 4, characterized in that: The cleaning strips (68) are provided in two groups, one inside and one outside. The cleaning strips (68) are made of rubber blocks. The inner wall of the cleaning strips (68) is in interference fit with the surface of the cathode plate (65).

6. The air-insulated high-voltage switchgear for high altitude according to claim 5, characterized in that: The air inlet (3) is located above the dust discharge port (4), and the dust guide plate (612) is located below the air inlet (3).

7. The air-insulated high-voltage switchgear for high altitude according to claim 6, characterized in that: A sealing gasket (613) is glued to the bottom of the dust guide plate (612). The sealing gasket (613) is made of a rubber block and has an interference fit with the inner wall of the dust removal box (61).

8. The air-insulated high-voltage switchgear for high altitude according to claim 7, characterized in that: The dust guide plate (612) is distributed as a whole in an inclined manner toward the air inlet (3), and the side of the surface of the dust guide plate (612) close to the air inlet (3) is shorter than the side away from the air inlet (3).

9. The air-insulated high-voltage switchgear for high altitude according to claim 8, characterized in that: When the dust guide plate (612) moves downward to the lowest point, the bottom of the cleaning strip (68) is flush with the bottom of the cathode plate (65), and the top of the dust guide plate (612) is located below the bottom of the ash discharge port (4).

10. The air-insulated high-voltage switchgear for high altitude according to claim 9, characterized in that: The gap between the anode plate (64) and the cathode plate (65) and its size are equal to the gap formed between the two groups of guide rings (69) and their size, and the guide rings (69) are made of stainless steel.

Images