Axial-flow type cleaning device of high-low voltage switch cabinet

Abstract

The invention relates to the technical field of electricity, in particular to an axial-flow type cleaning device of a high-low voltage switch cabinet, which comprises a cabinet body, upper side plates are mounted at the upper positions of two parallel side surfaces of the cabinet body, lower side plates are arranged on the lower sides of the upper side plates, an air inlet is formed in one side surface of each lower side plate, and an annular cloth net is arranged on the inner side of each air inlet; the outer edge of the cloth net is connected with an elastic rubber ring, the elastic rubber ring adheres to the lower side plate, the inner edge of the cloth net is connected with an elastic rubber disc, and the side, away from the air inlet, of the elastic rubber disc is provided with a standby ventilation piece. And faults caused by heat dissipation interruption of electrical components are prevented.

Description

Technical Field

[0001] This invention relates to the field of electrical technology, specifically to an axial flow cleaning device for high and low voltage switchgear. Background Technology

[0002] High and low voltage switchgear, as core control equipment in power systems, contains densely packed electrical components that continuously generate heat during operation. If this heat cannot be dissipated in time, the internal temperature of the cabinet will rise, affecting the performance stability of the components and even causing malfunctions. Therefore, cooling fans are an indispensable heat dissipation component for switchgear. During operation, they force hot air out of the cabinet through exhaust, while simultaneously using the air pressure difference to allow cool air from outside the cabinet to enter the ventilation space formed by the cabinet and the door through air inlets at the bottom of the side of the cabinet, creating a continuous circulating cooling airflow to ensure that the components operate in a suitable temperature environment.

[0003] To prevent dust and particulate matter from entering the ventilation space through the air inlet and adhering to the surface of electrical components, causing problems such as reduced insulation and poor contact, filters are commonly installed at the air inlet in the industry to purify the air through interception. Over time, a large amount of dust accumulates on the filter, and the higher the dust concentration in the environment, the faster the clogging. Once the filter pores are filled with dust, the airflow per unit time continuously decreases, disrupting the original ventilation balance. When the filter becomes sufficiently clogged, the amount of cool air entering the ventilation space through the air inlet will be less than the amount of hot air exhausted by the cooling fan, leading to poor airflow circulation within the cabinet, a significant drop in heat dissipation efficiency, and maintenance personnel being unable to promptly detect the filter clogging, making proactive cleaning or replacement difficult. The temperature inside the cabinet will continue to rise due to poor heat dissipation. High temperatures accelerate the aging of electrical components, reducing insulation performance and lifespan, and in severe cases, may cause short circuits, burnout, and other malfunctions, affecting not only the normal power supply of the electrical system but also potentially causing equipment damage and safety hazards, resulting in unnecessary losses to production and operations. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an axial flow cleaning device for high and low voltage switchgear to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an axial flow cleaning device for high and low voltage switchgear, comprising a cabinet body, one side of which is open for hinged access doors. Upper side plates are installed on the upper parts of two parallel sides of the cabinet body, and a lower side plate is provided below each upper side plate, connected to the cabinet body. An air inlet is provided on one side of the lower side plate, and multiple exhaust holes are evenly distributed on one side of the upper side plate. Multiple cooling fans connected to the upper side plate are located inside the exhaust holes. A ring-shaped mesh is provided inside the air inlet, with an elastic rubber ring attached to its outer edge and bonded to the lower side plate. An elastic rubber disc is attached to the inner edge of the mesh, and a spare vent is provided on the side of the elastic rubber disc facing away from the air inlet. The ring-shaped mesh, bonded to the lower side plate by the elastic rubber ring, forms a dust barrier, intercepting airborne dust and particulate matter, preventing them from entering the cabinet and contaminating electrical components, thus ensuring the insulation performance and contact reliability of the components. The combined design of the mesh, elastic rubber disc, and spare venting components provides a structural foundation for emergency ventilation in case of blockage, solving the problem of no alternative ventilation channel after the traditional single filter screen becomes clogged, and building a dual protection system for filtration and emergency response.

[0006] The exhaust vents on the upper side panel work in conjunction with the cooling fan to form a stable forced exhaust path, while the air inlet on the lower side panel provides a channel for cold air to enter, ensuring airflow circulation and heat dissipation under normal operating conditions and maintaining a suitable temperature environment inside the cabinet.

[0007] Specifically, the backup ventilation component includes a ventilation pipe. A ventilation pipe is located on the side of the elastic rubber disc opposite to the air inlet. The ventilation pipe is connected to the lower side plate. A cross-shaped slit is formed in the center of one side of the elastic rubber disc. A pointed tip is machined at the end of the ventilation pipe near the elastic rubber disc for passing through the cross-shaped slit. Multiple equidistant ventilation holes are formed in a ring on the outer surface of the end of the ventilation pipe near the pointed tip. A blocking component is fitted onto the ventilation pipe to prevent the cross-shaped slit from opening arbitrarily under pressure differential. The pointed tip of the ventilation pipe is adapted to the cross-shaped slit of the elastic rubber disc. When the mesh becomes clogged, causing the pressure differential to reach a threshold, the pointed tip can quickly pass through the cross-shaped slit. The ventilation holes and the ventilation pipe form a backup ventilation channel, immediately supplementing the air intake and preventing a sudden rise in the cabinet temperature. The blocking component prevents the cross-shaped slit from opening arbitrarily under normal air pressure, ensuring that the normal filtration function of the mesh is not affected, achieving a logical adaptation of filtration priority and emergency backup.

[0008] Specifically, the blocking assembly includes a blocking ring fitted onto the vent pipe. A sleeve is installed on the side of the blocking ring facing away from the elastic rubber disc, and this sleeve is fitted onto the vent pipe. In its initial state, the blocking ring is in contact with the elastic rubber disc. Two compression springs are symmetrically installed on the side of the blocking ring facing away from the elastic rubber disc. The ends of the compression springs furthest from the blocking ring are connected to the vent pipe via a limiting structure. In the initial state, the blocking ring and elastic rubber disc are in contact, sealing the cross-shaped seam and preventing unfiltered air from entering through the gap, ensuring filtration tightness. When the air pressure difference overcomes the spring force, the sleeve moves with the blocking ring, unlocking the backup channel and achieving adaptive triggering. The spring force of the compression springs forms an air pressure threshold triggering mechanism, which can adapt to different degrees of mesh blockage, avoiding the opening of the backup channel even with minor blockages, balancing filtration effect and emergency needs.

[0009] Specifically, the limiting structure includes a ring. The end of the vent pipe away from the pointed end is fitted with a ring that is connected and fixed to the vent pipe. Two cylindrical bodies are symmetrically mounted on one side of the ring. The ends of the cylindrical bodies away from the ring are closed. The end of the compression spring away from the blocking ring is inserted into one of the cylindrical bodies. The ring and the cylindrical bodies cooperate to provide a stable installation and limiting space for the compression spring, preventing the compression spring from shifting or twisting during extension and retraction, ensuring uniform spring force output, and extending the service life of the compression spring.

[0010] Specifically, the side of the cylinder away from the ring is machined with internal threads, and a threaded head is threadedly connected to the same side. One end of the compression spring contacts the threaded head, and the side of the threaded head away from the compression spring has an internal hexagonal hole for inserting an internal hexagonal wrench. The threaded head engages with the internal threads of the cylinder, and the preload of the compression spring can be adjusted by rotating the threaded head with the internal hexagonal wrench, thereby setting the air pressure differential threshold for opening the backup ventilation channel. The threshold can be flexibly adjusted according to the dust concentration of the operating environment and the heat dissipation requirements of the switchgear, adapting to different dust scenarios such as industrial plants and outdoor environments. This avoids excessively high thresholds leading to heat dissipation interruption or excessively low thresholds leading to filtration failure, thus enhancing the applicability of the equipment.

[0011] Specifically, a limiting sleeve is fitted onto the end of the compression spring furthest from the cylinder, and the limiting sleeve is connected and fixed to the blocking ring. The limiting sleeve is fitted onto the end of the compression spring and fixed to the blocking ring, restricting the direction of extension and contraction of the compression spring, preventing lateral displacement or twisting of the compression spring when under force, and ensuring that the blocking ring moves linearly along the vent pipe.

[0012] Specifically, two connecting arms are symmetrically mounted on the outer surface of the ring. The connecting arms are L-shaped, and the end of the connecting arm away from the ring is connected and fixed to the lower side plate. The connecting arms firmly connect the ring and the lower side plate, forming a stable support structure.

[0013] Specifically, a baffle is provided on the outer side of the air inlet. The side of the baffle facing the lower side plate is open, and the open end of the baffle is connected to the lower side plate. A rectangular opening is machined at the upper part of the side of the baffle facing away from the lower side plate, and a perforated plate is installed inside the rectangular opening. Multiple round holes are evenly opened on one side of the perforated plate. The baffle and the perforated plate work together to form a secondary protection on the outside of the air inlet. The round holes of the perforated plate allow air to pass through while blocking large particles and lint from entering, reducing the rate of dust accumulation on the mesh and extending the cleaning cycle of the mesh. The baffle can also block dust that falls off when the mesh is shaken, reducing the spread of dust to the surrounding environment.

[0014] Specifically, the lower surface of the baffle has a dust discharge port, and a bottom box is located below the dust discharge port, which is inserted into the baffle. Dust that falls off when the mesh is shaken falls directly into the bottom box through the dust discharge port of the baffle, achieving centralized collection of accumulated dust.

[0015] Specifically, each of the two parallel sides of the base box is equipped with a plug-in ear, and a plug-in rail is fitted onto the plug-in ear. The plug-in rail has a U-shaped cross-section and is connected and fixed to the cover. The cooperation between the plug-in ear and the U-shaped plug-in rail enables the rapid positioning and fixing of the base box and the cover.

[0016] The beneficial effects of this invention are:

[0017] The mesh screen inside the air inlet is used to filter dust. When the mesh screen becomes clogged, resulting in insufficient airflow, the pressure difference between the inside and outside of the cabinet causes the mesh screen to move towards the vent pipe. At this time, the elastic rubber ring is stretched, and the elastic rubber disc overcomes the spring force of the compression spring to push the blocking ring along the vent pipe. The tip of the vent pipe passes through the cross-shaped seam of the elastic rubber disc, and the vent hole and the vent pipe form a backup ventilation channel, quickly supplementing the airflow into the space formed by the cabinet and the cabinet door. At this time, the air pressure on both sides of the mesh screen returns to uniformity. Under the action of the elastic rubber ring's rebound force, the mesh screen moves towards the air inlet and is in a shaking state. Thus, the dust attached to the mesh screen is removed by the shaking force, ensuring that the amount of hot air discharged by the cooling fan is balanced with the amount of air intake, avoiding a sudden rise in temperature inside the cabinet, and preventing electrical components from malfunctioning due to heat dissipation interruption.

[0018] Supported by the compression spring, the blocking ring and the elastic rubber disc are initially in contact to prevent the cross seam from opening arbitrarily. When the air pressure returns to normal after the mesh is cleaned, the compression spring pushes the sleeve to reset and re-seal the vent hole, ensuring the normal filtration function of the mesh. The whole process does not require real-time monitoring by maintenance personnel, achieving adaptive emergency heat dissipation.

[0019] By turning the threaded head inside the cylinder with an Allen wrench, the preload of the compression spring in its initial state can be adjusted, thereby setting the air pressure differential threshold for opening the backup ventilation channel. This adapts to different dust concentration environments and the heat dissipation requirements of high and low voltage switchgear, flexibly adjusting the emergency trigger sensitivity and enhancing the equipment's versatility. Attached Figure Description

[0020] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the structure of an axial flow cleaning device for a high and low voltage switchgear according to the present invention;

[0022] Figure 2 This is another perspective view of an axial flow cleaning device for a high and low voltage switchgear according to the present invention.

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This is a cross-sectional view of an axial flow cleaning device for a high and low voltage switchgear according to the present invention.

[0025] Figure 5 for Figure 4 Enlarged view at point B in the middle;

[0026] Figure 6 This is an exploded structural diagram of the vent pipe, mesh, and lower side plate in an axial flow cleaning device for a high and low voltage switchgear according to the present invention.

[0027] Figure 7 This is an exploded structural diagram of the orifice plate, bottom box, and baffle in an axial flow cleaning device for a high and low voltage switchgear according to the present invention.

[0028] In the diagram: 100, cabinet; 101, upper side panel; 102, lower side panel; 1021, air inlet; 200, baffle; 201, perforated plate; 2011, round hole; 202, bottom box; 2021, plug-in rail; 2022, plug-in ear; 203, ash discharge port; 204, rectangular opening; 300, mesh fabric; 301, elastic rubber ring; 302, elastic rubber disc; 3021, cross joint; 400, cooling fan; 500, vent pipe; 501, connecting arm; 502, blocking ring; 5021, pipe sleeve; 503, ring; 504, compression spring; 5041, cylinder; 5042, limit sleeve; 505, pointed end; 506, vent hole; 600, threaded head; 601, internal hexagonal hole. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0030] Please see Figures 1-7This invention provides a technical solution: an axial flow cleaning device for high and low voltage switchgear, comprising a cabinet 100, one side of which is open for hinged door connection; upper side plates 101 are installed on the upper parts of two parallel sides of the cabinet 100, with multiple exhaust holes evenly distributed on one side of each upper side plate 101, and multiple cooling fans 400 connected to the upper side plates 101 located inside the exhaust holes; a lower side plate 102 is located below the upper side plates 101, connected to the cabinet 100, and an air inlet 1021 is provided on one side of the lower side plate 102. The exhaust holes and cooling fans 400 cooperate to form a stable forced exhaust path, and the air inlet 1021 provides a channel for cold air to enter, ensuring airflow circulation and heat dissipation under normal operating conditions and maintaining a suitable temperature environment inside the cabinet 100.

[0031] An annular mesh 300 is provided on the inner side of the air inlet 1021. An elastic rubber ring 301 is connected to the outer edge of the mesh 300 and is adhered to the lower side plate 102. An elastic rubber disc 302 is connected to the inner edge of the mesh 300. The elastic rubber ring 301 serves to connect the mesh 300 and the lower side plate 102 and facilitates the shaking of the mesh 300.

[0032] A vent pipe 500 is provided on the side of the elastic rubber disc 302 away from the air inlet 1021. A ring 503, connected and fixed to the end of the vent pipe 500 away from the tip 505, is fitted onto the outer surface of the ring 503. Two connecting arms 501, each with an L-shaped structure, are symmetrically mounted on their outer surface. The end of the connecting arm 501 away from the ring 503 is connected and fixed to the lower side plate 102. The ring 503 and the connecting arms 501 cooperate to maintain the relative position of the vent pipe 500 and the lower side plate 102. At this time, the vent pipe 500, the elastic rubber disc 302, and the air inlet 1021 are concentrically arranged, achieving axial flow dust removal.

[0033] A cross-shaped slit 3021 is formed in the middle of one side of the elastic rubber disc 302. A pointed tip 505 is machined at one end of the vent pipe 500 near the elastic rubber disc 302 for passing through the cross-shaped slit 3021. Multiple vent holes 506 are formed in a ring shape and equidistantly on the outer surface of the end of the vent pipe 500 near the pointed tip 505. A blocking ring 502 is sleeved on the vent pipe 500. A sleeve 5021 is installed on the side of the blocking ring 502 away from the elastic rubber disc 302. The sleeve 5021 is sleeved on the vent pipe 500. The blocking ring 502 is in contact with the elastic rubber disc 302 in the initial state. Two compression springs 504 are symmetrically installed on the side of the blocking ring 502 away from the elastic rubber disc 302. Under the elastic support of the compression spring 504, in the initial state, the blocking ring 502 and the elastic rubber disc 302 are in contact, firmly sealing the cross seam 3021, preventing it from opening at will under normal air pressure, ensuring that the mesh 300 always plays a core filtering role, and preventing unfiltered air from entering the cabinet 100 without interception.

[0034] After the mesh 300 completes its self-cleaning process through shaking, the air pressure inside and outside the cabinet 100 returns to equilibrium. The compression spring 504 releases its elastic force, pushing the blocking ring 502 to smoothly reset along the vent pipe 500. The sleeve 5021 then re-adhere to the elastic rubber disc 302, completely sealing the vent hole 506 of the vent pipe 500. This allows airflow to re-enter after being filtered by the mesh 300, ensuring that the filtration and heat dissipation function under normal operating conditions is not affected. The entire emergency ventilation, self-cleaning, and reset process relies entirely on the synergistic effect of the air pressure difference and the elastic force of the compression spring 504. It requires no real-time monitoring or manual operation by maintenance personnel, achieving adaptive emergency heat dissipation and filtration function reset, significantly reducing maintenance costs and improving the autonomy and reliability of equipment operation.

[0035] The mesh 300 inside the air inlet 1021 performs the core filtration function, effectively intercepting dust and particulate matter in the air and preventing them from entering the cabinet 100 and contaminating electrical components. When excessive dust accumulates on the surface of the mesh 300, causing a decrease in airflow, a significant air pressure difference will form inside and outside the cabinet 100. Under the force of this pressure difference, the mesh 300 will move towards the vent pipe 500, while simultaneously stretching the elastic rubber ring 301 at its edge. The elastic rubber disc 302, moving with the mesh 300, will overcome the preload of the compression spring 504, pushing the blocking ring 502 to slide smoothly along the vent pipe 500, allowing the tip 505 of the vent pipe 500 to pass smoothly through the cross slit 3021 of the elastic rubber disc 302. At this time, the vent pipe 500 and the annularly arranged vent holes 506 together form a backup ventilation channel, quickly replenishing the ventilation space formed by the cabinet 100 and the cabinet door with cool air, and rapidly balancing the air pressure on both sides of the mesh 300. After the air pressure returns to equilibrium, the elastic rubber ring 301 releases its rebound force, pulling the mesh 300 back towards the air inlet 1021. During this process, the mesh 300 vibrates, and the dust adhering to its surface is removed under the combined action of the vibration and gravity, achieving self-cleaning of the mesh 300. The entire process ensures a dynamic balance between the amount of hot air exhausted by the cooling fan 400 and the amount of air intake, preventing a sudden rise in temperature inside the cabinet 100. Furthermore, through the synergistic effect of self-cleaning and emergency ventilation, it fundamentally prevents electrical components from malfunctioning due to heat dissipation interruptions, maintaining stable equipment operation without manual intervention.

[0036] Two cylindrical bodies 5041 are symmetrically mounted on one side of the ring 503. The end of the cylindrical body 5041 away from the ring 503 is closed. An internal thread is machined on the side of the cylindrical body 5041 away from the ring 503. A threaded head 600 is threaded onto this side of the cylindrical body 5041. The end of the compression spring 504 away from the blocking ring 502 is inserted into the cylindrical body 5041 and contacts the threaded head 600. The side of the threaded head 600 away from the compression spring 504 has an internal hexagonal hole 601 for inserting an internal hexagonal wrench. A limiting sleeve 5042 is fitted onto the end of the compression spring 504 away from the cylindrical body 5041, and the limiting sleeve 5042 is connected and fixed to the blocking ring 502. The limiting sleeve 5042 and the cylindrical body 5041 together limit the end of the compression spring 504, improving the stability of the compression spring 504 installation.

[0037] By turning the threaded head 600 inside the cylinder 5041 with an Allen wrench, the initial preload of the compression spring 504 can be adjusted, thereby flexibly setting the air pressure differential threshold for activating the backup ventilation channel. This design allows for targeted adjustment of the emergency mechanism's trigger sensitivity based on differences in dust concentration in the operating environment and the actual heat dissipation load requirements of the high and low voltage switchgear. In scenarios with high dust concentrations, the threshold can be lowered to activate emergency ventilation and self-cleaning earlier; in scenarios with high heat dissipation requirements, the threshold can be increased to ensure filtration effectiveness while avoiding frequent triggering. By dynamically adapting to different operating conditions, the applicability of the equipment is significantly broadened, enhancing its versatility and practical value.

[0038] A baffle 200 is provided on the outside of the air inlet 1021. The side of the baffle 200 facing the lower side plate 102 is open, and the open end of the baffle 200 is connected to the lower side plate 102. A rectangular opening 204 is machined on the upper part of the side of the baffle 200 away from the lower side plate 102. A perforated plate 201 is installed in the rectangular opening 204. A plurality of round holes 2011 are evenly opened on one side of the perforated plate 201. A ash discharge port 203 is opened on the lower surface of the baffle 200. A bottom box 202 is provided on the lower side of the ash discharge port 203. A plug-in ear 2022 is installed on each of the two parallel sides of the bottom box 202. A plug-in rail 2021 is fitted on the plug-in ear 2022. The cross-section of the plug-in rail 2021 is "U" shaped. The plug-in rail 2021 is connected and fixed to the baffle 200. The plug-in ear 2022 and the plug-in rail 2021 cooperate to realize the plug-in connection between the bottom box 202 and the cover 200. The perforated plate 201 in the cover 200 allows air to enter while preventing foreign objects from touching the mesh 300 or entering the cabinet 100, thus improving safety. At the same time, the dust attached to the surface of the mesh 300 during the shaking process is blocked by the cover 200 and the perforated plate 201, preventing the dust shaken off the mesh 300 from spreading randomly. Then, the dust shaken off the mesh 300 falls into the bottom box 202 through the dust discharge port 203. After separating the bottom box 202 and the cover 200, the dust collected in the bottom box 202 can be transferred.

[0039] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-low voltage switchgear axial flow cleaning device, characterized by: The system includes a cabinet (100), one side of which is open and the open side is used to hinge the cabinet door. Upper side panels (101) are installed on the upper parts of the two parallel sides of the cabinet (100). A lower side panel (102) is provided below the upper side panel (101) and is connected to the cabinet (100). An air inlet (1021) is provided on one side of the lower side panel (102), and multiple exhaust holes are evenly distributed on one side of the upper side panel (101). The exhaust vent is provided with a plurality of cooling fans (400) connected to the upper side plate (101) on the inner side. The air inlet (1021) is provided with a ring-shaped mesh (300) on the inner side. An elastic rubber ring (301) is connected to the outer edge of the mesh (300). The elastic rubber ring (301) is adhered to the lower side plate (102). An elastic rubber disc (302) is connected to the inner edge of the mesh (300). A spare ventilation component is provided on the side of the elastic rubber disc (302) away from the air inlet (1021).

2. The axial flow cleaning device of a high-low voltage switchgear according to claim 1, characterized in that: The spare ventilation component includes a ventilation pipe (500). The ventilation pipe (500) is provided on the side of the elastic rubber disc (302) away from the air inlet (1021). The ventilation pipe (500) is connected to the lower side plate (102). A cross slit (3021) is opened in the middle of one side of the elastic rubber disc (302). A pointed tip (505) for passing through the cross slit (3021) is processed at one end of the ventilation pipe (500) near the elastic rubber disc (302). A plurality of ventilation holes (506) are opened in a ring at equal intervals on the outer surface of the end of the ventilation pipe (500) near the pointed tip (505). A blocking component for preventing the cross slit (3021) from opening arbitrarily under the action of air pressure difference is sleeved on the ventilation pipe (500).

3. The axial flow cleaning device for high and low voltage switchgear according to claim 2, characterized in that: The blocking assembly includes a blocking ring (502), which is sleeved on the vent pipe (500). A sleeve (5021) is installed on the side of the blocking ring (502) away from the elastic rubber disc (302). The sleeve (5021) is sleeved on the vent pipe (500). In the initial state, the blocking ring (502) is in contact with the elastic rubber disc (302). Two compression springs (504) are symmetrically installed on the side of the blocking ring (502) away from the elastic rubber disc (302). The end of the compression spring (504) away from the blocking ring (502) is connected to the vent pipe (500) through a limiting structure.

4. The axial flow cleaning device for high and low voltage switchgear according to claim 3, characterized in that: The limiting structure includes a ring (503). The end of the vent pipe (500) away from the tip (505) is fitted with a ring (503) that is connected and fixed to the vent pipe (500). Two cylinders (5041) are symmetrically installed on one side of the ring (503). The end of the cylinder (5041) away from the ring (503) is closed. The end of the compression spring (504) away from the blocking ring (502) is inserted into the cylinder (5041).

5. An axial flow cleaning device for high and low voltage switchgear according to claim 4, characterized in that: The inner side of the cylinder (5041) away from the ring (503) is machined with an internal thread. The inner side of the cylinder (5041) with the internal thread is threaded with a threaded head (600). One end of the compression spring (504) is in contact with the threaded head (600). The side of the threaded head (600) away from the compression spring (504) has an internal hexagonal hole (601) for inserting an internal hexagonal wrench.

6. The axial flow cleaning device for high and low voltage switchgear according to claim 5, characterized in that: The compression spring (504) is fitted with a limiting sleeve (5042) at one end away from the cylinder (5041), and the limiting sleeve (5042) is connected and fixed to the blocking ring (502).

7. An axial flow cleaning device for high and low voltage switchgear according to claim 5, characterized in that: Two connecting arms (501) are symmetrically installed on the outer surface of the ring (503). The connecting arms (501) are L-shaped, and the end of the connecting arm (501) away from the ring (503) is connected and fixed to the lower side plate (102).

8. An axial flow cleaning device for high and low voltage switchgear according to claim 7, characterized in that: The air inlet (1021) is provided with a baffle (200) on the outside. The side of the baffle (200) facing the lower side plate (102) is open. The open end of the baffle (200) is connected to the lower side plate (102). A rectangular opening (204) is machined on the upper part of the side of the baffle (200) away from the lower side plate (102). A perforated plate (201) is installed in the rectangular opening (204). A plurality of round holes (2011) are evenly opened on one side of the perforated plate (201).

9. An axial flow cleaning device for high and low voltage switchgear according to claim 8, characterized in that: The lower surface of the baffle (200) is provided with a ash discharge port (203), and a bottom box (202) is provided on the lower side of the ash discharge port (203). The bottom box (202) is inserted into the baffle (200).

10. An axial flow cleaning device for high and low voltage switchgear according to claim 9, characterized in that: The bottom box (202) has two parallel sides equipped with plug ears (2022), and plug rails (2021) are fitted on the plug ears (2022). The cross-section of the plug rails (2021) is "U" shaped, and the plug rails (2021) are connected and fixed to the cover (200).

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