CN115954784A - A new type of low-voltage JP cabinet that is dust-proof, leak-proof and rain-proof - Google Patents

Abstract

The invention relates to the technical field of low-voltage power distribution equipment, in particular to a novel low-voltage JP cabinet that is dustproof, leakproof and rainproof. The new low-voltage JP cabinet includes a cabinet body and a cabinet door, and also includes a water cooling device, an air cooling device and a self-sealing device; The wind blows the fan to generate power, which drives the cooling fan to rotate and exhaust heat. The water cooling device includes a water collection tank and a cold water pipe. The water cooling device collects rainwater through the water collection 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 the strong wind or heavy rain, so that the present invention has the ability to automatically switch the corresponding heat dissipation mode according to the environmental change compared with the mainstream JP cabinet, so as to ensure that it is not affected by the strong wind and heavy rain. , to achieve dustproof and rainproof inside the cabinet.

Description

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

technical field

The invention relates to the technical field of low-voltage power distribution equipment, in particular to a novel low-voltage JP cabinet that is dustproof, leakproof and rainproof.

Background technique

The JP cabinet will generate a lot of heat when the equipment is running, and it needs to dissipate heat in time to ensure the normal operation of the equipment. Generally, the JP cabinet will achieve ventilation and heat dissipation by setting louver air outlets on the cabinet body. It can also reduce the entry of dust and rainwater. However, with the transformation of the rural power grid, a large number of JP cabinets are arranged in the wilderness, and the working environment is relatively harsh. When encountering strong winds or heavy rains, the traditional louvered air outlets cannot avoid the problems of dust and rain leakage. When dust enters the cabinet, it will adhere to electrical appliances and circuits, reducing insulation performance and heat dissipation performance, while water vapor will affect the normal operation of electrical appliances in the cabinet, bringing potential safety hazards.

In order to improve the dust-proof ability, the existing JP cabinet will add a dust-proof net to the louver air outlet to reduce the dust entering from the louver air outlet in windy weather. However, the dust-proof net will greatly reduce the effect of ventilation and heat dissipation, and the better the dust-proof effect, the more it will affect the heat dissipation, so the application effect is not ideal. There are also JP cabinets equipped with dust-proof nets and cooling fans for heat exchange, which have higher heat dissipation efficiency than mainstream JP cabinets and can reduce the entry of dust. However, since the cooling fan needs to run continuously, the operating cost is high, and the air humidity is high during the rainy season. High-efficiency ventilation will lead to excessive internal humidity, which will gradually condense into water droplets after contacting the operating equipment, and there is a risk of short-circuiting the equipment. . In addition, there are some JP cabinets that use water cooling to dissipate heat, which can realize heat dissipation in a completely enclosed cabinet, which effectively solves the problems of dust and water ingress, but also requires the uninterrupted operation of the circulating pump, which also has operating costs after being put into use. high question. Therefore, there is a certain market demand for designing a new type of low-voltage JP cabinet that is energy-saving, environmentally friendly, and dustproof, leakproof and rainproof.

Contents of the invention

Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a new type of low-voltage JP cabinet that is suitable for outdoor harsh environments, can automatically switch the corresponding heat dissipation mode according to environmental changes, and is more energy-saving and environmentally friendly under the premise of dust-proof, leak-proof and rain-proof. Solve the problem.

A new dust-proof, leak-proof and rain-proof low-voltage JP cabinet of the present invention is the same as the mainstream JP cabinet. The 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 cooling fan and a drive shaft; a fan is horizontally arranged in the center of the top of the cabinet, and the bottom of the shaft of the fan is connected to the The drive shaft in the cabinet, and the driven wheel matched with the drive shaft is set on the top of the cabinet, the drive shaft is connected with the driven wheel, the left and right sides of the cabinet are provided with cooling fans, and the cooling fan is set The air outlet; the driven wheel is driven and connected to the cooling fan through the drive shaft; the cooling holes and the air outlet are louver holes with low outside and high inside, and the cabinet is provided with several air inlets and a dust-proof filter;

The water cooling device includes a water collection tank and a cold water pipe; vertical supports are arranged at the four corners of the top of the cabinet, and the top of the support is fixed with a sloping roof, and the sloping roof is provided with a screen; the water collecting tank It can be lifted and slidably installed on the bracket. The bottom of the water collection tank is funnel-shaped. The center of the bottom of the water collection tank is provided with a water outlet pipe, and the middle section of the water outlet pipe is provided with a booster mechanism; , and is fixedly connected with the cabinet body; a vertical cooling plate is set in the cabinet, and cold water pipes distributed in a continuous "S" shape are arranged in the cooling plate, and the bottom end of the water connection pipe is connected to the top of the cold water pipe , the bottom end of the cold water pipe extends out of the cabinet;

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 arranged 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 , the expansion spring is set between the bottom of the sealing plate and the cabinet; the support is provided with a platform located at the bottom of the water collection tank, and the second expansion spring is set between the platform and the support; the top of the sealing plate is at A pressing rod protruding from the cabinet body and passing through the second expansion spring is respectively arranged on the front and rear sides; the bottom end of the drive shaft is provided with a centrifugal variable diameter wheel, and the inner top of the cabinet body can be moved horizontally on the left and right sides respectively. A slider is slidably arranged, and a horizontally rotating runner is arranged at the bottom of the slider, and the centrifugal variable diameter wheel is driven and connected to the runner; the sliders on the left and right sides are respectively provided with a stay wire to connect to the top of the sealing plate at the bottom.

Further, a circular brake disc is arranged at the bottom of the water collection tank.

Further, the bottom of the brake disc is provided with a second brake disc that slides up and down, and a third expansion spring is provided between the second brake disc and the brake disc.

Further, a circle of guardrails is welded around the support of the cabinet body.

Further, the air inlet is provided with a downwardly bent pipe elbow, and a dustproof filter is provided at the end of the pipe elbow.

Further, the water cooling device further includes a supercharging mechanism, and the supercharging mechanism is arranged in the middle section of the water outlet pipe.

Preferably, the supercharging mechanism is a supercharging turbine.

Further, a ring of sealing strips is provided on the inner side of the cabinet door.

Further, the top surface of the cabinet is set in the shape of a "square pyramid", and the front extension is set as a rain eaves.

Further, a bearing is provided between the drive shaft and the cabinet body.

Further, cooling fins are arranged on the cold water pipe.

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

1. It can respond according to environmental changes, use environmental resources to automatically switch to the corresponding heat dissipation mode, and realize dustproof or leakproof rainproof in the corresponding environment, so as to ensure that the electrical equipment in the cabinet can operate in a suitable environment.

2. In the air-cooling mode where the air-cooling device is involved, all cooling holes are closed, and natural wind is used as power to drive the cooling fan for heat exchange. All the air entering the cabinet enters from the air inlet with dust-proof filter to avoid strong wind Blow the dust into the cabinet interior. In the water-cooling mode where the water-cooling device is involved, the cabinet body is in a sealed state, and the inside of the cabinet body dissipates heat through the rainwater flowing in the cold water pipe to prevent rainwater from entering the cabinet body.

3. The heat dissipation holes on the cabinet do not need to be equipped with dust-proof 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 in by dust due to strong winds. At the same time, the cabinet can also rely on unshielded heat dissipation The hole maintains good heat dissipation capacity in the mode of ventilation and heat dissipation.

4. The overall structure is purely mechanical, without using any electronic components. The corresponding mode is automatically triggered by environmental changes during operation, and the power comes from the natural environment it is dealing with. The application cost is low and it is more environmentally friendly.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the front sectional view of the present invention;

Fig. 3 is an enlarged view of local detail A in Fig. 2;

Fig. 4 is an enlarged view of the local detail B in Fig. 2;

Fig. 5 is an enlarged view of a local detail C in Fig. 2;

Fig. 6 is a right side sectional view of the present invention;

Fig. 7 is a schematic diagram of the driving mode of the air cooling device;

Fig. 8 is a cross-sectional view of a part of the structure of the present invention.

In the figure: cabinet body 1, cooling hole 101, air outlet 102, air inlet 103, dustproof filter 1031, pipe elbow 1032, bracket 104, top canopy 105, screen 1051, guardrail 106, rain eaves 107, bearing 108. Lifting slide rail 109, cabinet door 2, handle 201, lockset 202, fan 301, cooling fan 302, drive shaft 303, drive wheel 3031, drive wheel 304, drive belt 305, water collection tank 401, water outlet pipe 4011, water pipe 4012, drain pipe 4013, booster 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 reducer Wheel 502, inner wheel 5021, telescopic hole 50211, telescopic rod 50212, outer wheel 5022, spring 5023, slide block 503, stretch spring 504, stretch spring 505, base 6, wire pipe 7.

Detailed ways

In order to better understand the present invention, the embodiments of the present invention will be explained in detail below in conjunction with FIG. 1 to FIG. 8 .

It should be noted that the "front, back, left, right, up, and down" directions mentioned in the text are all based on the "front, back, left, right, up, and down" directions in FIG. 1 .

A new dust-proof, leak-proof and rain-proof low-voltage JP cabinet of the present invention is the same as the mainstream JP cabinet. The main part is composed of a cabinet body 1 and a cabinet door 2. The cabinet door 2 is hinged on the front of the cabinet body 1 in a split manner. On the left and right sides of the cabinet body 1, a number of heat dissipation holes 101 utilizing gas flow to dissipate heat, and wire pipes 7 for incoming and outgoing lines are respectively provided, and a handle 201 and a lock 202 are provided on the cabinet door 2. The difference is that the new low-voltage JP cabinet also includes an air cooling device, a water cooling device and a self-sealing device. Wherein the air cooling device includes a fan 301, a cooling fan 302 and a drive shaft 303; the fan 301 is sheathed and welded on the top of a hollow drive shaft 303, and the bottom of the drive shaft 303 passes through the center of the top of the cabinet body 1 However, the fan 301 is rotatably arranged on the top of the cabinet body 1 . A cooling fan 302 is provided on the left and right sides of the cabinet body 1 , and an air outlet 102 matching the cooling fan 302 is cut out in the cabinet body 1 . Both the heat dissipation holes 101 and the air outlet 102 are louver holes with low outside and high inside, so as to prevent drizzle or dust from entering the interior of the cabinet body 1 through the heat dissipation holes 101 or the air outlet 102 . The driving shaft 303 is welded with a large-diameter driving wheel 3031, and a small-diameter driving wheel 304 corresponding to the cooling fan 302 is respectively arranged on the left and right sides of the cabinet 1. The driving wheel 304 and the driving wheel 3031 pass through the driving belt. 305 is drivingly connected; the transmission wheel 304 is then drivingly connected to the cooling fan 302 and the driving shaft 303 through the transmission shaft 306 , so that the driving shaft 303 is drivingly connected to the cooling fan 302 . The cabinet body 1 is provided with several air inlets 103, and the air inlets 103 are provided with dustproof filter screens 1031.

The water cooling device includes a water collection tank 401 and a cold water pipe 403; as shown in Figure 1 and Figure 2, the top four corners of the cabinet body 1 are provided with vertical brackets 104, and the top of the bracket 104 is provided with a slanted roof awning 105, the inclined roof canopy 105 is provided with a screen 1051. A "funnel" type water collecting tank 401 can be lifted and slidably arranged on the support 104, and the bottom outlet of the water collecting tank 401 is welded with a water outlet pipe 4011 penetrating into the axis of the drive shaft 303, and in the middle section of the water outlet pipe 4011 A pressurizing mechanism 402 that increases the water pressure to increase the flow rate is provided. As shown in FIG. 3 , the supercharging mechanism 402 is preferably implemented using a turbocharging turbine with mature technology and relatively low cost. A water connection pipe 4012 is sleeved on the bottom of the water outlet pipe 4011, and is fixedly connected with the cabinet body 1, so that the water outlet pipe 4011 can expand and contract on the top of the water connection pipe 4012. As shown in FIG. 2 , a cooling plate is arranged inside the cabinet body 1 . The cooling plate is composed of cold water pipes 403 distributed in a continuous “S” shape, and the size and quantity of the cooling plate can be set according to the size of the cabinet 1 as required. The bottom of the cabinet body 1 is horizontally provided with a drainage pipe 4013 with both ends protruding from the cabinet body.

The self-sealing device includes a sealing plate 501, a centrifugal variable diameter wheel 502 and a slider 503; as shown in FIG. 2, FIG. 4 and FIG. The lifting slide rail 109, the sealing plate 501 is arranged to slide up and down in the lifting slide rail 109, the sealing plate 501 is provided with a plurality of through holes 5011 corresponding to the cooling holes 101 and the air outlet 102, the bottom of the sealing plate 501 is in contact with the cabinet An expansion spring 504 is arranged between the bodies 1 . Under normal conditions, the sealing plate 501 is held at a certain height by the elastic support of the stretching spring 504, wherein the heat dissipation hole 101 and its corresponding through hole 5011 are in a state of communication, and the air can freely pass through the heat dissipation hole 101 and its corresponding through hole when flowing. Via 5011. However, 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 .

A plurality of second expansion springs 505 are arranged between the water collection tank 401 and the bracket 104, and the elastic force of the second expansion springs 505 will support the water collection tank 401 to maintain a certain height, so that the bottom will not be in contact with the top of the fan 301 under normal conditions. . The top of the sealing plate 501 is respectively provided with a pressing bar 5012 protruding from the cabinet body 1 and passing through the center of the second expansion spring 505 at the front and rear sides; the bottom end of the drive shaft 303 is provided with a centrifugal reducing wheel 502 , the cabinet body 1 is slidably provided with two sliders 503 located on the left and right sides of the centrifugal reducing wheel 502, and the bottom of each sliding block 503 is provided with a runner 5031, and the centrifugal reducing wheel 502 and the runner 5031 are connected by a belt 5032 Drive connection: the sliders 503 on the left and right sides are respectively provided with a pull wire 5033 connected to the top of the sealing plate 501 at the bottom. As shown in Figure 8, 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, and the inner wheel 5021 is arranged with a number of telescopic rings in an axis rotation array. Holes 50211, each telescopic hole 50211 is provided with an outer wheel 5022 telescopically through a telescopic rod 50212, and a spring 5023 connecting the inner wheel 5021 and the outer wheel 5022 is arranged in the telescopic hole 50211, and the outer end of the outer wheel 5022 is heavier than the inner end . Under normal conditions, the centrifugal reducing wheel 502 is affected by the elastic force of the spring 5032, and all the outer wheels 5022 protrude. At this time, the centrifugal reducing wheel 502 is in the state of maximum diameter. When the centrifugal variable diameter wheel 502 is driven and connected with the running wheel 5031, affected by the gravity of the sealing plate 501, the connected belt 5032 exerts a pulling force on the outer wheel 5022, so that the outer wheel 5022 compresses the spring 5032 and shrinks together. At this time, the centrifugal variable diameter wheel 502 Minimum diameter state. When the centrifugal variable diameter wheel 502 rotates synchronously with the drive shaft 303, affected by the centrifugal force, the pressure of the belt 5032 on the spring 5032 and the gravity balance of the sealing plate 501 are broken, and all the outer wheels 5022 gradually protrude from the telescopic hole 50211 to the outside. With the continuous improvement of the rotating speed, the centrifugal force is also continuously increased. Finally, after all the outer wheels 5022 are stretched out, the centrifugal reducing wheel 502 at this time is in the state of maximum diameter. When the wind is too small, although the fan 301 will be affected by the wind and rotate, the wind is not enough to blow up the dust on the ground, so it will not affect the inside of the cabinet 1. At this time, the outer wheel 5022 of the centrifugal reducing wheel 502 will also It cannot be stretched out due to insufficient rotational speed, so that its own diameter remains unchanged.

In order to increase the braking ability of the water collection tank 401 on the fan 301, the brake fan can be quickly stopped when there is enough water, and switched to water cooling mode, a circular brake disc 404 is set at the bottom of the water collection tank 401, so The brake disc 404 is realized by adding knurling at the bottom to increase the friction force.

Considering that when the rainstorm comes, it is often accompanied by strong winds, which greatly increases the speed of the fan 301. As a result, during the process of switching from air-cooled to water-cooled, if the brake disc 404 is directly in contact with the ultra-high-speed fan 301 for braking, the fan 301 may It will cause structural damage due to lack of cushioning and direct braking. Therefore, as shown in FIG. 3 , a second brake disc 4041 that slides up and down is set at the bottom of the brake disc 404 , and a third expansion spring is set between the second brake disc 4041 and the brake disc 404 4042. Since the second brake disc 4041 is stretched by the third stretching spring 4042 and belongs to the state of stretching out, it will first contact the fan 301 for preliminary deceleration during braking, and the braking process will also follow the accumulation of water in the water collection tank 404. Increase and compress the third expansion spring 4042 as a buffer until the third expansion spring 4042 is fully compressed after the accumulated water weight is sufficient, so that the brake disc 404 and the second brake disc 4041 fully contact the top surface of the fan 301, thereby realizing Full braking of the fan 301.

In order to protect the fan 301 and the water collection tank 404 from being damaged during operation, the cabinet body 1 is welded with a circle of ventilating guardrail 106 around the support as protection.

Considering that in windy weather, wind and rain often come successively. Before the accumulation of water in the water collection tank 401 is completed, because the water cooling device does not have the ability to start cooling, it can only be cooled by air through the air cooling device. Before the cooling device and the water cooling device are alternated, although all the cooling holes 101 are in a closed state, no rainwater will enter, but since the cooling fan 302 needs to draw air from the air inlet 103, the rainwater at this time is likely to enter the cabinet from the air inlet 103 The interior of body 1. Therefore, as shown in FIG. 5 , a pipe elbow 1032 that is connected to each air inlet 103 and bends downward is provided on the cabinet body 1 , and the dustproof filter screen 1031 is arranged at the end of the pipe elbow 1032 .

Considering that there may be stagnant water entering the cabinet when the staff opens the cabinet door 2 after the rain, so in order to waterproof, a circle of sealing strips (such as hollow rubber strips) are set on the inside of the cabinet door 2, and the inside of the cabinet body 1 The top surface is set as a "square pyramid" type, and the front extension is set as a rain eaves 107, so that the top surface of the cabinet body 1 will not accumulate water, and the top of the cabinet door 2 will not accumulate water. A base 6 is welded at the bottom of the cabinet 1, and the top of the base 6 is chamfered around to avoid water accumulation and prevent the water flow on the bottom surface from submerging the cabinet 1 at the same time.

In order to improve the cooling capacity of the cold water pipe 403 in the water cooling mode, as shown in FIG. 6 , several arrays of cooling fins 405 are interspersed and fixed on the cold water pipe 403 to cool the inside of the cabinet through the cooling fins 405 .

As shown in FIG. 3 , in order to reduce friction and increase the speed of the fan 301 , a bearing 108 is provided between the drive shaft 303 and the cabinet body 1 .

Working principle of the present invention: at first all the lines that go in and out of the novel low-voltage JP cabinet must go in and out from the line pipe 7, and be sealed with waterproof adhesive tape. In normal weather, the new low-voltage JP cabinet dissipates heat through the cooling holes 101, and in this state it is in a natural ventilation cooling mode. When encountering continuous or continuous windy weather (4 winds can blow the dust on the ground, the "gale" refers to winds above 4), in order to prevent the wind from blowing dust into the cabinet body 1 from the cooling holes 101, the The new low-voltage JP cabinet is switched to the air-cooled heat dissipation mode. The fan 301 driven by the wind starts to rotate, and at the same time drives the cooling fan 302 to start, and rotates faster and faster as the speed increases. Due to the strong wind driving the fan 301 to reach a high speed, the centrifugal variable diameter wheel 502 is gradually stretched, during which 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 to drive the slider 503 slides 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 holes 101 on the cabinet 1 are closed due to the dislocation of the through hole 5011 of the sealing plate 501, and the heat dissipation of the cabinet 1 at this time The method is completely changed to use the heat dissipation fan 302 to dissipate heat. During this period, the heat dissipation fan 302 sucks in air from the air inlet 103 and then discharges the air from the air outlet 102, thereby realizing the air-cooled heat dissipation mode.

When encountering rainy weather, especially heavy rainfall weather, the rainwater will pass through the screen 1051 of the canopy 105 and enter the water collection tank 401 to be collected. While the water collecting tank 401 collects rainwater, the rainwater entering the water collecting tank 401 will flow into the water receiving pipe 4012 from the water outlet pipe 4011, and then be diverted to the cold water pipe 403 through the water receiving pipe 4012 and then discharged. During this period, because the water collection efficiency of the water collection box 401 is greater than the drainage speed, as the accumulated water in the water collection box 401 continues to increase, the water collection box 401 will continue to increase in weight and then compress the second stretching spring 505 in the bracket and then drop. The second brake disc 4041 at the bottom of 401 first contacts the top of the fan 301 for preliminary deceleration, and then the brake disc 404 intervenes, and the second brake disc 4041 completely contacts the top surface of the fan 301, thereby realizing complete braking of the fan 301 . When the water collecting tank 401 descends, its bottom surface will press down the pressing bar 5012 on the top of the sealing plate 501, so that the sealing plate 501 will descend after being stressed and compress the spring 504 to expand. As the force on the sealing plate 501 drops, the through-holes 5011 corresponding to the cooling holes 101 and the air outlets 102 are all in a misaligned state, so that all the cooling holes 101 and the air outlets 102 are completely closed, and the water cooling mode is switched.

In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, or operate in a particular orientation, and thus should not be construed as limiting the invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be mechanical connection or electrical connection, or two The internal communication of each element may be directly connected or indirectly connected through an intermediary. Those skilled in the art can understand the specific meanings of the above terms according to specific situations. The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention within.

Claims (10)

1. A novel dustproof and rainproof low-voltage JP cabinet comprises a cabinet body (1) and a cabinet door (2), wherein a plurality of radiating holes (101) are formed in the left side and the right side of the cabinet body (1); the method is characterized in that: the novel low-voltage JP cabinet also 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 driving shaft (303); a fan (301) is horizontally arranged in the center of the top of the cabinet body (1), and the bottom of the axis of the fan (301) is connected with a driving shaft (303) extending into the cabinet body (1); the left side and the right side of the cabinet body (1) are respectively provided with a heat dissipation fan (302) in driving connection with a driving shaft (303), and an air outlet (102) matched with the heat dissipation fan (302); the cabinet body (1) is provided with a plurality of air inlets (103) with dustproof filter screens (1031);

the water cooling device comprises a water collecting tank (401) and a cold water pipe (403); vertical supports (104) are arranged at four corners of the top of the cabinet body (1), an inclined top canopy (105) with a screen (1051) is arranged at the top of each support (104), a water collecting tank (401) is arranged on each support (104) in a lifting and sliding manner, and the bottom of each water collecting tank (401) is connected with 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 body (1); a cold dissipation plate is arranged in the cabinet body (1), and consists of cold water pipes (403) distributed in an S shape continuously; the top end of the cold water pipe (403) is connected with a water receiving pipe (4012), and the bottom end of the cold water pipe extends out of the cabinet body (1);

the self-sealing device comprises a sealing plate (501), a centrifugal reducing wheel (502) and a sliding block (503); a sealing plate (501) which slides up and down is arranged on each of the left side and the right side in the cabinet body (1), the sealing plate (501) is provided with through holes (5011) which correspond to the heat dissipation holes (101) and the air outlet (102) one by one, and a spreading spring (504) is arranged between the bottom of the sealing plate (501) and the cabinet body (1); a second strutting spring (505) is arranged between the water collecting tank (401) and the bracket (104); the top of the sealing plate (501) is provided with a pressure lever (5012) extending out of the cabinet body (1); the tail end of the driving shaft (303) is provided with a centrifugal reducing wheel (502), the cabinet body (1) is provided with two sliding blocks (503) positioned at the left side and the right side of the centrifugal reducing wheel (502) in a sliding manner, the bottom of each sliding block (503) is provided with a rotating wheel (5031), and the centrifugal reducing wheel (502) is in driving connection with the rotating wheel (5031) through a belt (5032); the slide blocks (503) at the left side and the right side are respectively provided with a stay wire (5033) which is connected with the top end of the sealing plate (501) at the bottom.

2. A novel dust-proof rain-proof low-voltage JP cabinet as claimed in claim 1, wherein: the bottom of the water collecting tank (401) is provided with a circular brake disc (404).

3. A novel dust-proof rain-proof low-voltage JP cabinet as claimed in claim 2, characterized in that: and a second brake disc (4041) which slides up and down is arranged at the bottom of the brake disc (404), and a third expanding spring (4042) is arranged between the second brake disc (4041) and the brake disc (404).

4. A novel dust-proof rain-proof low-voltage JP cabinet as claimed in claim 1, wherein: the cabinet body (1) is welded with a circle of guardrail (106) around the bracket.

5. A novel dust-proof rain-proof low-voltage JP cabinet as claimed in claim 1, wherein: the air inlet (103) is provided with a downward bent pipe elbow (1032), and the dustproof filter screen (1031) is arranged at the tail end of the pipe elbow (1032).

6. A novel dust-proof rain-proof low-voltage JP cabinet as claimed in claim 1, wherein: the water cooling device further comprises a pressurization mechanism (402), wherein the pressurization mechanism (402) is arranged in the middle section of the water outlet pipe (4011).

7. A novel dust-proof rain-proof low-voltage JP cabinet as claimed in claim 1, wherein: and a circle of sealing strip is arranged on the inner side of the cabinet door (2).

8. A novel dust-proof rain-proof low-voltage JP cabinet as claimed in claim 1, wherein: the top surface of the cabinet body (1) is arranged to be a rectangular pyramid shape, and the front surface of the cabinet body extends to be a rain eave (107).

9. A novel dust-proof rain-proof low-voltage JP cabinet as claimed in claim 1, wherein: and a bearing (108) is arranged between the driving shaft (303) and the cabinet body (1).

10. A novel dust-proof rain-proof low-voltage JP cabinet as claimed in claim 1, wherein: the cold water pipe (403) is provided with a plurality of cold dissipation sheets (404).

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