A new type of low-voltage JP cabinet that is dust-proof and rain-proof

Abstract

The present invention relates to the technical field of low-voltage power distribution equipment, and in particular to a new type of low-voltage JP cabinet that is dustproof and rainproof. The new type of low-voltage JP cabinet includes a cabinet body and a cabinet door, as well as a water cooling device, an air cooling device and a self-sealing device; the air cooling device includes a fan, a heat dissipation fan and a drive shaft. The air cooling device generates power by setting a fan at the top center of the cabinet body, and drives the heat dissipation fan to rotate to exhaust and dissipate heat. The water cooling device includes a water collecting tank and a cold water pipe. The water cooling device collects rainwater through the water collecting tank and uses the process of rainwater passing through the cold water pipe to achieve cooling. The self-sealing device can automatically activate the water cooling device or the air cooling device according to strong winds or heavy rain. Compared with mainstream JP cabinets, the present invention has the ability to automatically switch to the corresponding heat dissipation mode according to environmental changes to ensure that it is not affected by strong winds and heavy rain, and to achieve dust and rain protection inside the cabinet.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage power distribution equipment, in particular to a new low-voltage JP cabinet which is dustproof and rainproof. Background Art

[0002] JP cabinets generate a significant amount of heat when equipment is running, requiring timely dissipation to ensure proper operation. Typically, JP cabinets utilize louvered vents within the cabinet body to achieve this. These louvers not only provide ventilation and heat dissipation within the cabinet, but also reduce the ingress of dust and rainwater. However, with the ongoing transformation of rural power grids, a large number of JP cabinets are deployed outdoors in harsh working environments. In strong winds or heavy rain, traditional louvered vents are no longer able to prevent dust ingress and rainwater ingress. Once dust enters the cabinet, it adheres to electrical appliances and circuits, reducing insulation and heat dissipation performance. Moisture vapor, on the other hand, can affect the proper functioning of the appliances within, posing a safety hazard.

[0003] To improve dust control, existing JP cabinets often add dust screens to the louvered vents to reduce dust ingress during strong winds. However, dust screens significantly reduce ventilation and heat dissipation, and the greater the dust control, the greater the impact on heat dissipation, making their use less effective. Some JP cabinets utilize dust screens and cooling fans for heat exchange, which offer higher heat dissipation efficiency than mainstream JP cabinets while also reducing dust ingress. However, since the cooling fans must operate continuously, operating costs are high. Furthermore, during the rainy season, high humidity levels can lead to excessive internal humidity, which gradually condenses into water droplets upon contact with operating equipment, posing a risk of short-circuiting. Furthermore, some JP cabinets utilize water cooling, which allows for heat dissipation within a completely enclosed cabinet, effectively addressing dust and water ingress. However, these still require the continuous operation of a circulating pump, similarly resulting in high operating costs. Therefore, there is a significant market demand for a new low-voltage JP cabinet that is energy-efficient, environmentally friendly, dust-proof, and leak-proof. Summary of the Invention

[0004] In response to the above-mentioned deficiencies in the prior art, the present invention provides a new low-voltage JP cabinet suitable for harsh outdoor environments, which can automatically switch to the corresponding heat dissipation mode according to environmental changes, and is more energy-saving and environmentally friendly while being dustproof and rainproof, to solve the problem.

[0005] The present invention discloses a new type of low-voltage JP cabinet that is dustproof and rainproof. Like mainstream JP cabinets, the main body consists of a cabinet body and a cabinet door, and a plurality of heat dissipation holes are respectively provided on the left and right sides of the cabinet body; in addition, the new type of low-voltage JP cabinet also includes a water cooling device, an air cooling device and a self-sealing device; the air cooling device includes a fan, a heat dissipation fan and a drive shaft; a fan is horizontally provided at the top center of the cabinet body, the bottom of the fan axis is connected to the drive shaft extending into the cabinet body, and a driven wheel that cooperates with the drive shaft is provided at the top of the cabinet body, the drive shaft is drivingly connected to the driven wheel, heat dissipation fans are provided on the left and right sides of the cabinet body, and air outlets that cooperate with the heat dissipation fans are provided; the driven wheel is drivingly connected to the heat dissipation fan via the drive shaft; the heat dissipation holes and the air outlets are both louver holes with a low outside and a high inside, the cabinet body is provided with a plurality of air inlets, and a dustproof filter is provided;

[0006] The water cooling device includes a water collecting tank and a cold water pipe; vertical brackets are provided at the top four corners of the cabinet, a sloping canopy is fixedly provided on the top of the bracket, and a screen is provided on the sloping canopy; the water collecting tank can be raised and lowered and slidably provided on the bracket, the bottom of the water collecting tank is funnel-shaped, a water outlet pipe is provided at the bottom center of the water collecting tank, and a pressurizing mechanism is provided in the middle section of the water outlet pipe; a water receiving pipe is sleeved on the bottom of the water outlet pipe and fixedly connected to the cabinet; an upright cooling plate is provided in the cabinet, and a cold water pipe with a continuous "S" shape distribution is provided in the cooling plate, the bottom end of the water receiving pipe is connected to the top end of the cold water pipe, and the bottom end of the cold water pipe extends out of the cabinet;

[0007] The self-sealing device includes a sealing plate, a centrifugal variable diameter wheel and a slider; a sealing plate that can slide up and down is respectively provided on the left and right sides of the cabinet body, and the sealing plate is provided with a number of through holes corresponding to the heat dissipation holes and the air outlet, and a support spring is provided between the bottom of the sealing plate and the cabinet body; the bracket is provided with a platform located at the bottom of the water collecting tank, and a second support spring is provided between the platform and the bracket; a pressure rod extending out of the cabinet body and passing through the second support spring is respectively provided on the front and rear sides of the top of the sealing plate; a centrifugal variable diameter wheel is provided at the bottom end of the drive shaft, and a slider that can slide horizontally on the left and right sides of the inner top of the cabinet body is respectively provided, and a horizontally rotating runner is provided at the bottom of the slider, and the centrifugal variable diameter wheel is drive-connected to the runner; the sliders on the left and right sides are respectively provided with a pull wire connected to the top of the sealing plate at the bottom.

[0008] Furthermore, a circular brake disc is provided at the bottom of the water collecting tank.

[0009] Furthermore, a second brake disc that slides up and down is provided at the bottom of the brake disc, and a third expansion spring is provided between the second brake disc and the brake disc.

[0010] Furthermore, the cabinet body is welded with a guardrail around the bracket.

[0011] Furthermore, the air inlet is provided with a downwardly bent pipe elbow, and a dust filter is provided at the end of the pipe elbow.

[0012] Furthermore, the water cooling device also includes a boosting mechanism, which is arranged in the middle section of the water outlet pipe.

[0013] Preferably, the boost mechanism is a boost turbine.

[0014] Furthermore, a sealing strip is provided on the inner side of the cabinet door.

[0015] Furthermore, the top surface of the cabinet is configured as a "quadrangular pyramid" shape, and the front surface is extended to form a rain eaves.

[0016] Furthermore, a bearing is provided between the drive shaft and the cabinet.

[0017] Furthermore, cooling fins are provided on the cold water pipe.

[0018] Compared with the existing JP cabinet, the beneficial effects of the present invention are:

[0019] 1. It can respond to environmental changes and automatically switch to the corresponding heat dissipation mode by utilizing environmental resources, so as to achieve dustproof or rainproof in the corresponding environment and ensure that the electrical equipment in the cabinet can operate in a suitable environment.

[0020] 2. In air-cooling mode, all cooling vents are closed, using natural wind to drive the cooling fan for heat exchange. All air entering the cabinet enters through air inlets equipped with dust filters to prevent strong winds from blowing dust into the cabinet. In water-cooling mode, the cabinet is sealed, and heat is dissipated through rainwater flowing through the cold water pipes, preventing rainwater from entering the cabinet.

[0021] 3. The heat dissipation holes on the cabinet do not need to be equipped with dustproof nets. The air cooling device will quickly intervene when the wind is strong enough to drive the dust, ensuring that the cabinet will not be blown into the dust due to strong wind. At the same time, the cabinet can also rely on the unobstructed heat dissipation holes to maintain good heat dissipation capacity in the ventilation and heat dissipation mode.

[0022] 4. The overall structure is purely mechanical and does not use any electronic components. During operation, the corresponding mode is automatically triggered by environmental changes, and the power comes from the natural environment it is responding to. The application cost is low and it is more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a front cross-sectional view of the present invention;

[0025] Figure 3for Figure 2 A magnified view of the local detail A;

[0026] Figure 4 for Figure 2 A magnified view of the local detail B;

[0027] Figure 5 for Figure 2 A magnified view of the local detail C in the figure;

[0028] Figure 6 It is a right side cross-sectional view of the present invention;

[0029] Figure 7 This is a schematic diagram of the driving mode of the air cooling device;

[0030] Figure 8 It is a cross-sectional view of part of the structure of the present invention.

[0031] In the figure: cabinet 1, heat dissipation hole 101, air outlet 102, air inlet 103, dust filter 1031, pipe elbow 1032, bracket 104, roof canopy 105, screen 1051, guardrail 106, rain eaves 107, bearing 108, lifting slide rail 109, cabinet door 2, handle 201, lock 202, fan 301, cooling fan 302, drive shaft 303, drive wheel 3031, transmission wheel 304, drive belt 305, water collection tank 401, water outlet pipe 4 011, water connecting pipe 4012, drain pipe 4013, boosting mechanism 402, cold water pipe 403, brake disc 404, second brake disc 4041, third expansion spring 4042, cooling plate 405, sealing plate 501, through hole 5011, centrifugal reducing wheel 502, inner wheel 5021, telescopic hole 50211, telescopic rod 50212, outer wheel 5022, spring 5023, slider 503, expansion spring 504, expansion spring 505, base 6, wire pipe 7. DETAILED DESCRIPTION

[0032] In order to better understand the present invention, Figures 1 to 8 The embodiments of the present invention will be explained in detail.

[0033] It should be noted that the directions “front, back, left, right, up, down” mentioned in the text are all based on Figure 1 The directions of “front, back, left, right, up and down” are used as the reference.

[0034] The present invention discloses a new, dustproof and rainproof low-voltage JP cabinet. Like mainstream JP cabinets, its main components consist of a cabinet body 1 and a cabinet door 2. The cabinet door 2 is hinged to the front of the cabinet body 1 in a biparting manner. Several heat dissipation holes 101 are provided on the left and right sides of the cabinet body 1 to dissipate heat through air flow, as well as conduits 7 for wiring in and out. The cabinet door 2 is equipped with a handle 201 and a lock 202. However, this new low-voltage JP cabinet also includes air cooling, water cooling, and a self-sealing device. The air cooling device comprises a fan 301, a heat dissipation fan 302, and a drive shaft 303. The fan 301 is sleeved and welded to the top of a hollow drive shaft 303. The bottom of the drive shaft 303 passes through the center of the top of the cabinet body 1, allowing the fan 301 to be rotatably mounted on the top of the cabinet body 1. A heat dissipation fan 302 is provided on each side of the cabinet body 1, and an air outlet 102 is cut into the cabinet body 1 to accommodate the heat dissipation fan 302. The heat dissipation holes 101 and the air outlet 102 are both louvers with lower exteriors and higher interiors, preventing drizzle or dust from entering the cabinet 1 through the heat dissipation holes 101 or the air outlet 102. A large-diameter drive wheel 3031 is welded to the drive shaft 303. A small-diameter transmission wheel 304 corresponding to the heat dissipation fan 302 is provided on each of the left and right sides of the cabinet 1. The transmission wheel 304 and the drive wheel 3031 are connected by a drive belt 305. The transmission wheel 304 then connects the heat dissipation fan 302 to the drive shaft 303 via a transmission shaft 306, thereby connecting the drive shaft 303 to the heat dissipation fan 302. The cabinet 1 is provided with a plurality of air inlets 103, each of which is equipped with a dust filter 1031.

[0035] The water cooling device includes a water collecting tank 401 and a cold water pipe 403; Figure 1 and Figure 2 As shown in the figure, vertical brackets 104 are provided at the four corners of the top of the cabinet 1, and a sloping canopy 105 is provided on the top of the bracket 104, and a screen 1051 is provided on the sloping canopy 105. A "funnel" shaped water collecting box 401 is provided on the bracket 104 so as to be able to be raised and lowered and slidably. A water outlet pipe 4011 is welded to the bottom outlet of the water collecting box 401 and penetrates the axis of the drive shaft 303. A booster mechanism 402 is provided in the middle section of the water outlet pipe 4011 to increase the water pressure and flow rate. Figure 3 As shown in , the boost mechanism 402 is preferably implemented using a boost turbine with mature technology and low cost. A water inlet pipe 4012 is sleeved on the bottom of the water outlet pipe 4011 and fixedly connected to the cabinet 1, so that the water outlet pipe 4011 can be extended and retracted at the top of the water inlet pipe 4012. Figure 2As shown in FIG, a cooling plate is installed within the cabinet 1. This cooling plate consists of a series of cold water pipes 403 arranged in an "S" shape. The size and number of cooling plates can be customized based on the size of the cabinet 1. A drainage pipe 4013 is installed horizontally at the bottom of the cabinet 1, with both ends extending out of the cabinet. The top end of the cold water pipe 403 is connected to the water inlet pipe 4012, and the bottom end is connected to the drainage pipe 4013.

[0036] The self-sealing device includes a sealing plate 501, a centrifugal variable diameter wheel 502 and a slider 503; Figure 2 、 Figure 4 and Figure 5 As shown in FIG, the cabinet body 1 is provided with lifting rails 109 on both sides thereof for cooperating with the sealing plate 501. The sealing plate 501 is slidably arranged in the lifting rails 109. The sealing plate 501 is provided with a plurality of through holes 5011 corresponding to the heat dissipation holes 101 and the air outlet 102. A support spring 504 is provided between the bottom of the sealing plate 501 and the cabinet body 1. Under normal conditions, the sealing plate 501 is supported by the elastic force of the support spring 504 to maintain a certain height. The heat dissipation holes 101 and their corresponding through holes 5011 are in a connected state, and air can flow freely through the heat dissipation holes 101 and their corresponding through holes 5011. The air outlet 102 and its corresponding through holes 5011 are in a misaligned state, and the height of these through holes 5011 is lower than that of the air outlet 102.

[0037] A number of second expansion springs 505 are provided between the water collecting box 401 and the bracket 104. The elastic force of the second expansion springs 505 will support the water collecting box 401 to maintain a certain height so that its bottom will not contact the top of the fan 301 under normal conditions. A pressure rod 5012 extending out of the cabinet 1 and passing through the center of the second expansion spring 505 is provided on the front and rear sides of the top of the sealing plate 501; a centrifugal variable diameter wheel 502 is provided at the bottom end of the driving shaft 303; two sliders 503 are slidingly provided on the left and right sides of the centrifugal variable diameter wheel 502 on the cabinet 1; a rotating wheel 5031 is provided at the bottom of each slider 503; the centrifugal variable diameter wheel 502 and the rotating wheel 5031 are connected by a belt 5032; a pull wire 5033 is provided on the sliders 503 on the left and right sides to connect to the top of the sealing plate 501 at the bottom. Figure 8As shown in , the centrifugal variable diameter wheel 502 includes an inner wheel 5021, an outer wheel 5022, and a spring 5023. The inner wheel 5021 is fixedly connected to the drive shaft 303. The inner wheel 5021 is provided with a plurality of telescopic holes 50211 arranged in an axially rotatable array. An outer wheel 5022 is telescopically mounted in each telescopic hole 50211 via a telescopic rod 50212. A spring 5023 is disposed within the telescopic hole 50211 to connect the inner and outer wheels 5021 and 5022. The outer ends of the outer wheels 5022 are heavier than the inner ends. In a normal state, the centrifugal variable diameter wheel 502 is affected by the elastic force of the spring 5032, and all outer wheels 5022 are extended, at which point the centrifugal variable diameter wheel 502 is at its maximum diameter. When the centrifugal variable diameter wheel 502 is driven and connected to the rotating wheel 5031, the belt 5032, acting as a connection, exerts a pulling force on the outer wheel 5022 due to the influence of the gravity of the sealing plate 501, causing the outer wheel 5022 to compress the spring 5032 and then shrink together. At this time, the centrifugal variable diameter wheel 502 is in the minimum diameter state. When the centrifugal variable diameter wheel 502 rotates synchronously with the drive shaft 303, the influence of centrifugal force breaks the balance between the pressure of the belt 5032 on the spring 5032 and the gravity of the sealing plate 501, and all the outer wheels 5022 gradually extend outward from the telescopic hole 50211. As the speed continues to increase, the centrifugal force continues to increase. Finally, after all the outer wheels 5022 are extended, the centrifugal variable diameter wheel 502 is in the maximum diameter state. When the wind force is too weak, although the fan 301 will rotate under the influence of the wind force, the wind force is not strong enough to blow up the dust on the ground, so it will not affect the interior of the cabinet 1. At this time, the outer wheel 5022 of the centrifugal variable diameter wheel 502 cannot be extended due to insufficient speed, so that its own diameter remains unchanged.

[0038] In order to increase the braking ability of the water collecting tank 401 on the fan 301, the fan can be quickly braked to stop when there is enough water and switched to water cooling mode. A circular brake disc 404 is set at the bottom of the water collecting tank 401. The brake disc 404 is realized by adding knurling on the bottom to increase friction.

[0039] Considering that heavy rain is often accompanied by strong winds, which greatly increases the speed of the fan 301, if the brake disc 404 directly contacts the high-speed fan 301 during the process of switching from air cooling to water cooling, the fan 301 may be directly stopped due to lack of buffering, causing structural damage. Figure 3As shown in FIG, a second brake disc 4041 that slides up and down is provided at the bottom of the brake disc 404, and a third expansion spring 4042 is provided between the second brake disc 4041 and the brake disc 404. Since the second brake disc 4041 is extended by the third expansion spring 4042, it will first contact the fan 301 for initial deceleration during braking. During the braking process, as the water in the water collection tank 404 accumulates, the third expansion spring 4042 is compressed to act as a buffer. When the weight of the accumulated water is sufficient, the third expansion spring 4042 is fully compressed, causing the brake disc 404 and the second brake disc 4041 to fully contact the top surface of the fan 301, thereby completely braking the fan 301.

[0040] In order to protect the fan 301 and the water collecting box 404 from being damaged during operation, the cabinet 1 is welded with a circle of air-permeable guardrail 106 around the bracket for protection.

[0041] Considering that in windy and rainy weather, wind and rain often come one after another, before the water in the water collecting tank 401 is completely filled, the water cooling device does not have the ability to start cooling, so the air cooling device can only be used for heat dissipation. Before the air cooling device and the water cooling device are switched, although all the heat dissipation holes 101 are in a closed state and rainwater will not enter, the heat dissipation fan 302 needs to draw air from the air inlet 103, so rainwater is likely to enter the interior of the cabinet 1 from the air inlet 103. Therefore, Figure 5 As shown in , a pipe elbow 1032 connected to each air inlet 103 and bent downward is provided on the cabinet 1 , and the dust filter 1031 is provided at the end of the pipe elbow 1032 .

[0042] Considering that water may enter the cabinet when the staff opens the cabinet door 2 after rain, a sealing strip (such as a hollow rubber strip) is set on the inside of the cabinet door 2 to prevent water from entering. The top surface of the cabinet body 1 is set in a "quadrangular pyramid" shape, and the front is extended to form a rain canopy 107, so that water will not accumulate on the top surface of the cabinet body 1 or on the top of the cabinet door 2. A base 6 is welded to the bottom of the cabinet body 1, and the top of the base 6 is chamfered to prevent water from accumulating and prevent water from flooding the cabinet body 1.

[0043] In order to improve the cooling capacity of the cold water pipe 403 in the water cooling mode, Figure 6 As shown in FIG, a plurality of arrays of cooling fins 405 are fixed on the cold water pipe 403, and the cooling fins 405 are used to cool the interior of the cabinet.

[0044] like Figure 3 As shown in FIG, in order to reduce friction and increase the rotation speed of the fan 301, a bearing 108 is provided between the driving shaft 303 and the cabinet 1.

[0045] The working principle of the present invention is as follows: First, all lines entering and exiting the new low-voltage JP cabinet must enter and exit from the wire pipe 7 and be sealed with waterproof tape. Under normal weather conditions, the new low-voltage JP cabinet dissipates heat through the heat dissipation holes 101, and in this state, it is in a natural ventilation heat dissipation mode. When encountering continuous or persistent strong winds (level 4 wind can blow dust on the ground, and the "strong wind" refers to winds above level 4), in order to prevent the strong wind from blowing dust into the interior of the cabinet 1 through the heat dissipation holes 101, the new low-voltage JP cabinet switches to an air-cooled heat dissipation mode. Driven by the wind, the fan 301 starts to rotate, and at the same time drives the cooling fan 302 to start, and the rotation speed increases. Because the strong wind drives the fan 301 to reach a high speed, the centrifugal variable diameter wheel 502 is gradually expanded. During this period, the runner 5031 driven and connected to the centrifugal variable diameter wheel 502 is affected by the increase in the diameter of the centrifugal variable diameter wheel 502, and drives the slider 503 to slide inward, so that the slider 503 pulls the sealing plate 501 with the pull wire 5033 during the sliding period, so that the heat dissipation hole 101 on the cabinet 1 is closed due to the misalignment of the through hole 5011 of the sealing plate 501. At this time, the heat dissipation method of the cabinet 1 is completely changed to heat dissipation by the heat dissipation fan 302. During this period, the heat dissipation fan 302 draws air in from the air inlet 103 and then discharges the air from the air outlet 102, thereby realizing the air-cooled heat dissipation mode.

[0046] During rainy weather, especially heavy rainfall, rainwater will pass through the screen 1051 of the sloping canopy 105 and enter the water collection tank 401 for collection. While the water collection tank 401 is collecting rainwater, the rainwater entering the water collection tank 401 flows from the outlet pipe 4011 into the water inlet pipe 4012, and then is diverted to the cold water pipe 403 through the water inlet pipe 4012 before being discharged. During this period, because the water collection efficiency of the water collection tank 401 is greater than the drainage rate, as the accumulated water in the water collection tank 401 continues to increase, the water collection tank 401 continues to increase in weight, compressing the second expansion spring 505 in the bracket and descending. During this period, the second brake disc 4041 at the bottom of the water collection tank 401 first contacts the top of the fan 301 to initially decelerate the fan. Then, the brake disc 404 intervenes, and the second brake disc 4041 fully contacts the top surface of the fan 301, thereby completely braking the fan 301. As the water collecting tank 401 descends, its bottom surface presses down on the pressure rod 5012 on the top of the sealing plate 501, forcing the sealing plate 501 downward and compressing the spring 504. As the sealing plate 501 descends, the through holes 5011 corresponding to the heat dissipation holes 101 and air outlets 102 become misaligned, completely sealing all the heat dissipation holes 101 and air outlets 102, switching to water cooling mode.

[0047] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication between two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A new type of low-voltage JP cabinet that is dustproof and rainproof, comprising a cabinet body (1) and a cabinet door (2), wherein a plurality of heat dissipation holes (101) are provided on both the left and right sides of the cabinet body (1); characterized in that: The novel low-voltage JP cabinet further comprises an air cooling device, a water cooling device and a self-sealing device; the air cooling device comprises a fan (301), a heat dissipation fan (302) and a drive shaft (303); the fan (301) is horizontally arranged at the top center of the cabinet (1), and the bottom of the axis of the fan (301) is connected to the drive shaft (303) extending into the cabinet (1); the heat dissipation fan (302) driven and connected to the drive shaft (303) is respectively arranged on the left and right sides of the cabinet (1), and an air outlet (102) matched with the heat dissipation fan (302) is arranged; the cabinet (1) is provided with a plurality of air inlets (103) with dustproof filters (1031); The water cooling device comprises a water collecting box (401) and a cold water pipe (403); vertical brackets (104) are provided at the four corners of the top of the cabinet (1); a slanted canopy (105) with a screen (1051) is provided on the top of the bracket (104); a water collecting box (401) is provided on the bracket (104) in a manner that it can be lifted and slid; the bottom of the water collecting box (401) is connected to a water outlet pipe (4011); a water receiving pipe (4012) extending into the bottom of the water outlet pipe (4011) is fixed in the cabinet (1); a cooling plate is provided in the cabinet (1), and the cooling plate is composed of cold water pipes (403) distributed in a continuous "S" shape; the top end of the cold water pipe (403) is connected to the water receiving pipe (4012), and the bottom end extends out of the cabinet (1); The self-sealing device comprises a sealing plate (501), a centrifugal variable diameter wheel (502) and a slider (503); a sealing plate (501) that slides up and down is respectively provided on the left and right sides of the interior of the cabinet (1); the sealing plate (501) is provided with through holes (5011) that correspond one-to-one to the heat dissipation holes (101) and the air outlet (102); a spreading spring (504) is provided between the bottom of the sealing plate (501) and the cabinet (1); a second spreading spring (505) is provided between the water collecting box (401) and the bracket (104); the sealing plate (5 01) is provided with a pressure rod (5012) extending out of the cabinet (1); a centrifugal variable diameter wheel (502) is provided at the end of the driving shaft (303); the cabinet (1) is provided with two sliding blocks (503) located on the left and right sides of the centrifugal variable diameter wheel (502); a rotating wheel (5031) is provided at the bottom of each sliding block (503); the centrifugal variable diameter wheel (502) and the rotating wheel (5031) are connected by a belt (5032); a pull wire (5033) is provided on each of the sliding blocks (503) on the left and right sides to connect to the top of the sealing plate (501) at the bottom.

2. A new type of dustproof and rainproof low-voltage JP cabinet as claimed in claim 1, characterized in that: A circular brake disc (404) is provided at the bottom of the water collecting tank (401).

3. A new type of dustproof and rainproof low-voltage JP cabinet as claimed in claim 2, characterized in that: A second brake disc (4041) that slides up and down is provided at the bottom of the brake disc (404), and a third expansion spring (4042) is provided between the second brake disc (4041) and the brake disc (404).

4. A new type of dustproof and rainproof low-voltage JP cabinet as claimed in claim 1, characterized in that: The cabinet (1) is welded with a guardrail (106) around the bracket.

5. A new type of low-voltage JP cabinet that is dustproof and rainproof as claimed in claim 1, characterized in that: The air inlet (103) is provided with a downwardly bent pipe elbow (1032), and the dustproof filter (1031) is provided at the end of the pipe elbow (1032).

6. A new type of dustproof and rainproof low-voltage JP cabinet as claimed in claim 1, characterized in that: The water cooling device further comprises a pressurizing mechanism (402), and the pressurizing mechanism (402) is arranged in the middle section of the water outlet pipe (4011).

7. A new type of low-voltage JP cabinet that is dustproof and rainproof as claimed in claim 1, characterized in that: A circle of sealing strip is provided on the inner side of the cabinet door (2).

8. A new type of dustproof and rainproof low-voltage JP cabinet as claimed in claim 1, characterized in that: The top surface of the cabinet (1) is configured as a "quadrangular pyramid" shape, and the front surface is extended to form a rain eave (107).

9. A new type of dustproof and rainproof low-voltage JP cabinet as claimed in claim 1, characterized in that: A bearing (108) is provided between the drive shaft (303) and the cabinet (1).

10. A new type of dustproof and rainproof low-voltage JP cabinet as claimed in claim 1, characterized in that: A plurality of cooling fins (404) are provided on the cold water pipe (403).

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