High-sealing electrical power distribution cabinet

Abstract

The invention discloses a high-sealing electrical power distribution cabinet, and relates to the technical field of electrical power, the high-sealing electrical power distribution cabinet comprises a power distribution cabinet door and a power distribution cabinet body, the power distribution cabinet door is rotatably connected to the front end of the power distribution cabinet body, and the power distribution cabinet body and the power distribution cabinet door are integrally cast so as to improve the sealing performance of the power distribution cabinet; the sealing mechanism is arranged inside and outside the power distribution cabinet body, the silicone rubber sealing gasket is fixedly connected with the inner wall of a door frame of the power distribution cabinet body, the silicone rubber sealing gasket is of a hollow structure, a paraffin storage box is fixedly connected to the top of the power distribution cabinet body, and the front surface of the paraffin storage box communicates with a paraffin conveying pipe. The paraffin conveying pipes are communicated with the silicone rubber sealing gasket, and the silicone rubber sealing gasket is filled with paraffin. Filling and stable sealing of the gap can be realized, the overall sealing performance of the power distribution cabinet is improved, and an exchange circulation path of air inside and outside the power distribution cabinet is effectively blocked.

Description

Technical Field

[0001] The present invention relates to the field of electric power technology, and more particularly to a highly sealed electric power distribution cabinet. Background Art

[0002] The distribution cabinet is the final equipment of the power distribution system and a vital component of the power system. The distribution cabinet can distribute high-voltage or low-voltage electric energy to various electrical equipment or load centers according to demand and the structure of the power system. It can also monitor power parameters such as current, voltage, power, and frequency in real time to ensure the stable operation of the power system. When a fault occurs in the power system, the distribution cabinet can quickly cut off the faulty circuit to protect the safety of equipment and personnel.

[0003] Due to the exchange and circulation of air inside and outside the distribution cabinet, water molecules in the air can easily penetrate into the distribution cabinet, causing the electrical components installed in the distribution cabinet to be corroded by water molecules, resulting in oxidative damage such as rust and electrochemical corrosion. This situation increases the risk of short circuit failures and other related failures in the electrical system, posing a potential threat to the stable operation of the distribution cabinet and its distribution system. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a method that can fill and firmly seal these gaps, improve the overall sealing performance of the distribution cabinet, and effectively block the exchange and flow path of air inside and outside the distribution cabinet.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A highly sealed electric power distribution cabinet comprises a cabinet door and a cabinet body, wherein the cabinet door is rotatably connected to the front end of the cabinet body, the cabinet body and the cabinet door are integrally cast to improve the sealing performance of the cabinet, and a sealing mechanism is arranged inside and outside the cabinet body, the sealing mechanism comprises a silicone rubber sealing gasket fixedly connected to the front end of the inner wall of the cabinet body, the silicone rubber sealing gasket is a hollow structure, a paraffin storage box is fixedly connected to the top of the cabinet body, a paraffin delivery pipe is connected to the front surface of the paraffin storage box, the paraffin delivery pipes are all connected to the silicone rubber sealing gasket, the interior of the silicone rubber sealing gasket is filled with paraffin, a sealing gasket heating plate is fixedly connected to the outer surface of the silicone rubber sealing gasket, a delivery pipe heating plate is fixedly connected to the surface of the paraffin delivery pipe, and a storage box heating plate is fixedly connected to the interior of the paraffin storage box.

[0007] Furthermore, a paraffin extraction mechanism is provided inside a paraffin storage box and on the upper end of a distribution cabinet body, the paraffin extraction mechanism comprises an elastic rubber sheet fixedly connected to the upper end of an internal magnet rod, an internal magnet rod is fixedly connected to the interior of the paraffin storage box below the elastic rubber sheet, an external magnet rod is fixedly connected to the interior of the paraffin storage box above the elastic rubber sheet, magnet connecting rods are fixedly connected between adjacent external magnet rods and between adjacent internal magnet rods, a pull rope is fixedly connected to the upper end of one of the magnet connecting rods located between the external magnet rods, a vertical pole is fixedly connected to the top of the distribution cabinet door, a rotating shaft is rotatably connected to the top of the vertical pole, and the arc surface of the rotating shaft is fixedly connected to the pull rope.

[0008] Furthermore, the front and rear ends of the top of the paraffin storage box are fixedly connected with upright blocks, a support rod is fixedly connected between the two upright blocks, the middle part of the support rod is rotatably connected to the first steering shaft, the top front end of the distribution cabinet body is fixedly connected with a rotating rod, and the top of the rotating rod is rotatably connected to the second steering shaft.

[0009] Furthermore, a support stand is fixedly connected to the top of the paraffin storage box, and a first spring is fixedly connected between the lower end of the support stand and the external magnet bar.

[0010] Furthermore, a threading hole and a threading hole sealing mechanism are provided on the top of the distribution cabinet body. The threading hole sealing mechanism is arranged on the back and top of the distribution cabinet body. The threading hole sealing mechanism includes a suction fan fixedly connected to the back of the distribution cabinet body. The suction port of the suction fan is fixedly connected to a suction pipe. The end of the suction pipe away from the suction fan passes through the interior of the distribution cabinet body. A rubber sleeve is fixedly connected to the opening of the threading hole, and a rubber ring is fixedly connected to the upper end of the rubber sleeve. A rubber plug is movably connected to the inside of the rubber ring.

[0011] Furthermore, an annular seat is fixedly connected to the top of the distribution cabinet body, the rubber sleeve is located on the inner side of the annular seat, three vertical plates are fixedly connected to the upper end of the annular seat, and a clamping plate is fixedly connected to the top end of the vertical plate.

[0012] Furthermore, a triangular support plate is fixedly connected at the turning point between the vertical plate and the clamping plate.

[0013] Furthermore, a sealing ring is fixedly connected to the interior of the air suction pipe, and a blocking ball is arranged inside the air suction pipe.

[0014] Furthermore, the diameter of the blocking ball is larger than the diameter of the sealing ring and smaller than the inner diameter of the air suction pipe.

[0015] Furthermore, a support frame is fixedly connected to the interior of the air suction pipe, and a second spring is fixedly connected between the support frame and the blocking ball.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) In the process of closing the door of the distribution cabinet, the first spring is used to apply downward pressure to the elastic rubber sheet, causing the elastic rubber sheet to deform toward the inside of the paraffin storage box, so that the liquid paraffin in the paraffin storage box is injected into the silicone rubber sealing gasket. The liquid paraffin can be quickly filled in the silicone rubber sealing gasket, ensuring that the silicone rubber sealing gasket can effectively fill the tiny gap between the door of the distribution cabinet and the cabinet body of the distribution cabinet. As the temperature of the paraffin gradually decreases and solidifies, the gaps are filled and firmly sealed, thereby improving the overall sealing performance of the distribution cabinet and effectively blocking the exchange and flow path of air inside and outside the distribution cabinet.

[0018] (2) When opening the distribution cabinet door, the present invention uses a sealing gasket heating plate, a delivery pipe heating plate and a storage box heating plate to preheat the silicone rubber sealing gasket, the paraffin delivery pipe and the paraffin storage box respectively, so as to quickly melt and promote the fluidity of the paraffin, so that the paraffin in the silicone rubber sealing gasket, the paraffin delivery pipe and the paraffin storage box can be quickly converted into liquid, thereby facilitating the smooth opening of the distribution cabinet door.

[0019] (3) In the process of opening the distribution cabinet door, the present invention uses a pull rope to pull the external magnet rod and the internal magnet rod to cooperate with the elastic rubber sheet to bulge upward, so that part of the liquid paraffin in the silicone rubber sealing gasket can be extracted, effectively reducing the internal pressure and overall thickness of the silicone rubber sealing gasket. It not only reduces the physical contact area and friction between the distribution cabinet door and the silicone rubber sealing gasket when opening, but also reduces the wear of the silicone rubber sealing gasket, avoids the problem of difficulty in opening the cabinet door due to the difference in air pressure inside and outside the distribution cabinet, ensures the smoothness and stability of the distribution cabinet door during opening, and further improves the overall performance and ease of operation of the distribution cabinet.

[0020] (4) In this solution, when the cable needs to pass through the threading hole from which the rubber plug has been removed, a vacuum fan is used to partially evacuate the inside of the distribution cabinet, thereby creating a negative pressure environment inside the distribution cabinet. Under negative pressure conditions, the rubber ring is subjected to an inward rolling pressure force until it tightly wraps and fixes the cable and completely blocks the threading hole, thereby achieving effective closure of the threading hole and significantly enhancing the overall sealing performance of the distribution cabinet, further improving the sealing effect of the distribution cabinet and the convenience of overall operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 This is a structural schematic diagram of the back side of the power distribution cabinet of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the sealing mechanism of the present invention;

[0024] Figure 4 The schematic diagram of the structure of the paraffin extraction mechanism of the present invention; the threading hole sealing mechanism

[0025] Figure 5 For the present invention Figure 1 Enlarged view of point A in the middle;

[0026] Figure 6 It is a schematic diagram of the structure inside the air suction pipe of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the rubber sleeve and the rubber ring of the present invention without threading;

[0028] Figure 8 It is a schematic structural diagram of the threading of the rubber sleeve and the rubber ring of the present invention.

[0029] Description of the numbers in the figure:

[0030] 1. Distribution cabinet body; 2. Distribution cabinet door; 301. Silicon rubber sealing pad; 302. Sealing pad heating plate; 303. Paraffin delivery pipe; 304. Delivery pipe heating plate; 305. Paraffin storage box; 306. Storage box heating plate; 401. Draw rope; 402. Vertical pole; 403. Elastic rubber sheet; 404. External magnet rod; 405. Internal magnet rod; 406. Magnet connecting rod; 407. Vertical block; 408. Support rod; 409. The first steering shaft; 410, the first spring; 411, the supporting frame; 412, the rotating rod; 413, the second steering shaft; 414, the rotating shaft; 501, the suction fan; 502, the suction pipe; 503, the annular seat; 504, the vertical plate; 505, the clamping plate; 506, the triangular supporting plate; 507, the rubber sleeve; 508, the rubber ring; 509, the rubber plug; 601, the sealing ring; 602, the plugging ball; 603, the second spring; 604, the supporting frame. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0032] See also Figures 1 to 5 A highly sealed electric power distribution cabinet comprises a distribution cabinet door 2 and a distribution cabinet body 1. The distribution cabinet door 2 is rotatably connected to the front end of the distribution cabinet body 1. The distribution cabinet body 1 and the distribution cabinet door 2 are integrally cast to improve the sealing performance of the distribution cabinet.

[0033] Among them, the sealing mechanism is arranged inside and outside the distribution cabinet body 1, and the sealing mechanism includes a silicone rubber sealing gasket 301 fixedly connected to the front end of the inner wall of the distribution cabinet body 1, and the silicone rubber sealing gasket 301 is a hollow structure. A paraffin storage box 305 is fixedly connected to the top of the distribution cabinet body 1, and the front surface of the paraffin storage box 305 is connected to a paraffin delivery pipe 303, and the paraffin delivery pipes 303 are all connected to the silicone rubber sealing gasket 301. The interior of the silicone rubber sealing gasket 301 is filled with paraffin. Filling liquid paraffin into the silicone rubber sealing gasket 301 can make the silicone rubber sealing gasket 301 fill the gap between the distribution cabinet door 2 and the distribution cabinet body 1, realize the filling and fixing of the gap, so as to achieve high sealing of the distribution cabinet.

[0034] Among them, the outer surface of the silicone rubber sealing gasket 301 is fixedly connected with a sealing gasket heating plate 302, the surface of the paraffin delivery tube 303 is fixedly connected with a delivery tube heating plate 304, and the inside of the paraffin storage box 305 is fixedly connected with a storage box heating plate 306. The sealing gasket heating plate 302, the delivery tube heating plate 304 and the storage box heating plate 306 can make the paraffin in the silicone rubber sealing gasket 301, the paraffin delivery tube 303 and the paraffin storage box 305 melt and flow quickly.

[0035] Among them, the paraffin extraction mechanism is arranged inside the paraffin storage box 305 and on the upper end of the distribution cabinet body 1. The paraffin extraction mechanism includes an elastic rubber sheet 403 fixedly connected to the upper end of the inner part of the internal magnet rod 405. The inner part of the paraffin storage box 305 is located below the elastic rubber sheet 403 and is fixedly connected to the internal magnet rod 405. The inner part of the paraffin storage box 305 is located above the elastic rubber sheet 403 and is fixedly connected to the external magnet rod 404. There are adjacent external magnet rods 404 and adjacent internal magnet rods 405. A magnet connecting rod 406 is fixedly connected, and a pull rope 401 is fixedly connected to the upper end of one of the magnet connecting rods 406 located between the external magnet bars 404. The four sides of the elastic rubber sheet 403 are respectively fixedly connected to the four inner walls of the paraffin storage box 305, so that the elastic rubber sheet 403 bulges upward, and the paraffin in the silicone rubber sealing gasket 301 can be extracted, reducing the pressure and thickness in the silicone rubber sealing gasket 301, and making the elastic rubber sheet 403 concave, so that the liquid paraffin in the paraffin storage box 305 can be filled into the silicone rubber sealing gasket 301.

[0036] Among them, since the external magnet bar 404 is attracted to the internal magnet bar 405 by magnetic force, the external magnet bar 404 and the internal magnet bar 405 can move synchronously to control the inward and outward concavity of the elastic rubber sheet 403, and the pull rope 401 can drive the external magnet bar 404 and the internal magnet bar 405 to move, so as to achieve the purpose of applying tension to the first spring 410 and controlling the compression of the first spring 410. The top of the distribution cabinet door 2 is fixedly connected to the vertical rod 402, and the top of the vertical rod 402 is rotatably connected to the rotating shaft 414. The arc surface of the rotating shaft 414 is fixedly connected to the pull rope 401, the front and rear ends of the top of the paraffin storage box 305 are fixedly connected with upright blocks 407, a support rod 408 is fixedly connected between the two upright blocks 407, the middle part of the support rod 408 is rotatably connected with the first steering shaft 409, the top front end of the distribution cabinet body 1 is fixedly connected with a rotating rod 412, and the top of the rotating rod 412 is rotatably connected with the second steering shaft 413, and the transmission direction of the pulling force of the pull rope 401 can be adjusted by the first steering shaft 409 and the second steering shaft 413.

[0037] Among them, a support stand 411 is fixedly connected to the top of the paraffin storage box 305, and a first spring 410 is fixedly connected between the lower end of the support stand 411 and the external magnet rod 404. The first spring 410 can apply downward pressure to the elastic rubber sheet 403, so that the elastic rubber sheet 403 is concave toward the inside of the paraffin storage box 305, and liquid paraffin is filled into the silicone rubber sealing pad 301.

[0038] By adopting the above technical solution, if the switch cabinet door 2 is in an open state, the first spring 410 is in a compressed state due to the tension of the pull rope 401. Therefore, when the switch cabinet door 2 is closed, the pull rope 401 no longer applies tension to the first spring 410. At this time, the first spring 410 can push the external magnet bar 404 to move downward, exert downward pressure on the elastic rubber sheet 403, and then make the elastic rubber sheet 403 concave toward the inside of the paraffin storage box 305, so that the paraffin storage box 305 can be closed. The liquid paraffin in 05 is filled into the silicone rubber sealing pad 301 through the paraffin delivery pipe 303. Since the silicone rubber sealing pad 301 is soft and elastic, and the paraffin is liquid and has fluidity, the liquid paraffin is filled into the silicone rubber sealing pad 301 while the switch cabinet door 2 is closed, so that the silicone rubber sealing pad 301 can fill the gap between the switch cabinet door 2 and the switch cabinet body 1. After the temperature of the paraffin drops and solidifies, the gap can be filled and fixed, thereby achieving high sealing of the switch cabinet;

[0039] The sealing pad heating sheet 302, the conveying pipe heating sheet 304 and the storage box heating sheet 306 are all electrically connected to the circuit inside the power distribution cabinet, and are controlled by controlling the power switches of the sealing pad heating sheet 302, the conveying pipe heating sheet 304 and the storage box heating sheet 306. In this way, when the cabinet door of the power distribution cabinet needs to be opened, the silicone rubber sealing pad 301 is heated by the sealing pad heating sheet 302. The melting point of paraffin is only about 50°C, which is relatively low. The sealing pad heating sheet 302 can make the paraffin in the silicone rubber sealing pad 301 melt and flow quickly, so that the cabinet door 2 of the power distribution cabinet can be opened. During the process of opening the cabinet door 2, the external magnet bar 404 can be pulled by the pull rope 401, and the internal magnet bar 405 attracted to the external magnet bar 404 by magnetic force can move upward, so that the elastic rubber sheet 403 bulges upward, thereby extracting the paraffin in the silicone rubber sealing pad 301, reducing the pressure and thickness in the silicone rubber sealing pad 301, reducing the contact and friction between the cabinet door 2 and the silicone rubber sealing pad 301 when the cabinet door 2 is opened, reducing the wear on the silicone rubber sealing pad 301 and preventing the cabinet door 2 from being difficult to open due to the different air pressure inside and outside the cabinet. Similarly, the delivery pipe heating sheet 304 and the storage box heating sheet 306 can heat the paraffin inside the paraffin storage box 305 to melt it and flow back to the inside of the silicone rubber sealing pad 301 to achieve a sealing effect.

[0040] like Figures 6 to 8 As shown, a threading hole and a threading hole sealing mechanism are provided on the top of the distribution cabinet body 1. The threading hole sealing mechanism is arranged on the back and top of the distribution cabinet body 1. The threading hole sealing mechanism includes a suction fan 501 fixedly connected to the back of the distribution cabinet body 1. The suction port of the suction fan 501 is fixedly connected to a suction pipe 502. The end of the suction pipe 502 away from the suction fan 501 passes through the interior of the distribution cabinet body 1. A rubber sleeve 507 is fixedly connected to the opening of the threading hole, and a rubber ring 508 is fixedly connected to the upper end of the rubber sleeve 507. A rubber plug 509 is movably connected to the inside of the rubber ring 508. A part of the air in the distribution cabinet is extracted by the suction fan 501, so that the rubber ring 508 is rolled inward by negative pressure. When the rubber ring 508 is rolled inward, the cable can be clamped and the threading hole can be plugged to achieve a sealing effect. The threading hole without a cable can be plugged by the rubber plug 509.

[0041] Among them, an annular seat 503 is fixedly connected to the top of the distribution cabinet body 1, and the rubber sleeve 507 is located on the inner side of the annular seat 503. Three vertical plates 504 are fixedly connected to the upper end of the annular seat 503. The top of the vertical plate 504 is fixedly connected to a clamping plate 505. When the suction fan 501 draws the air in the distribution cabinet, the clamping plate 505 can prevent the cables from retracting into the distribution cabinet. A triangular support plate 506 is fixedly connected at the turning point between the vertical plate 504 and the clamping plate 505. The triangular support plate 506 can increase the supporting strength of the clamping plate 505 and improve the supporting effect of the clamping plate 505.

[0042] Among them, a sealing ring 601 is fixedly connected to the inside of the suction pipe 502, and a blocking ball 602 is arranged inside the suction pipe 502. When the suction fan 501 stops running, the blocking ball 602 can block the sealing ring 601 to separate the inside of the distribution cabinet from the outside world. The diameter of the blocking ball 602 is larger than the diameter of the sealing ring 601 and smaller than the inner diameter of the suction pipe 502. A supporting frame 604 is fixedly connected to the inside of the suction pipe 502, and a second spring 603 is fixedly connected between the supporting frame 604 and the blocking ball 602. The blocking ball 602 can be pushed by the second spring 603 to block the sealing ring 601.

[0043] By adopting the above-mentioned technical solution, if it is necessary to pass the cables through the distribution cabinet to realize the transmission of electric power, the rubber plug 509 at the corresponding position can be pulled out, and then the cables can be passed through the threading hole to pull out the rubber plug 509, and then a part of the air in the distribution cabinet can be extracted through the suction fan 501, so as to generate negative pressure inside the distribution cabinet, so that the rubber ring 508 is rolled inward until the rubber ring 508 clamps the cable and plugs the threading hole to achieve a sealing effect. When the suction fan 501 stops running, the second spring 603 can push the blocking ball 602 to block the sealing ring 601, so as to achieve the effect of isolating the inside of the distribution cabinet from the outside world. Similarly, when the suction fan 501 is running, the flowing air can cause the blocking ball 602 to separate from the sealing ring 601, so that the air inside the distribution cabinet can flow out;

[0044] Since the distance between the three clamping plates 505 is smaller than the diameter of the cable and the clamping plates 505 are bendable and elastic, when the cable is passed through the threading hole, the three clamping plates 505 always fit the surface of the cable. When the suction fan 501 draws the air out of the distribution cabinet, the cable can be supported by the inclined clamping plates 505, so that the cable cannot be retracted into the distribution cabinet, thereby avoiding affecting the sealing operation and sealing effect of the threading hole.

[0045] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A highly sealed electric power distribution cabinet, comprising a distribution cabinet door (2) and a distribution cabinet body (1), wherein the distribution cabinet door (2) is rotatably connected to the front end of the distribution cabinet body (1), and the distribution cabinet body (1) and the distribution cabinet door (2) are integrally cast to improve the sealing performance of the distribution cabinet, characterized in that: A sealing mechanism is provided inside and outside a power distribution cabinet body (1), the sealing mechanism comprises a silicone rubber sealing pad (301) fixedly connected to the front end of the inner wall of the power distribution cabinet body (1), the silicone rubber sealing pad (301) is a hollow structure, a paraffin storage box (305) is fixedly connected to the top of the power distribution cabinet body (1), the front surface of the paraffin storage box (305) is connected to a paraffin delivery pipe (303), the paraffin delivery pipe (303) is connected to the silicone rubber sealing pad (301), the interior of the silicone rubber sealing pad (301) is filled with paraffin, the outer surface of the silicone rubber sealing pad (301) is fixedly connected to a sealing pad heating plate (302), the surface of the paraffin delivery pipe (303) is fixedly connected to a delivery pipe heating plate (304), and the interior of the paraffin storage box (305) is fixedly connected to a storage box heating plate (306).

2. A highly sealed power distribution cabinet according to claim 1, characterized in that: A paraffin extraction mechanism, the paraffin extraction mechanism is arranged inside the paraffin storage box (305) and at the upper end of the distribution cabinet body (1), the paraffin extraction mechanism comprises an elastic rubber sheet (403) fixedly connected to the upper end of the inner part of the internal magnet bar (405), the inner part of the paraffin storage box (305) is located below the elastic rubber sheet (403) and is fixedly connected to the internal magnet bar (405), and the inner part of the paraffin storage box (305) is located above the elastic rubber sheet (403) and is fixedly connected to the external magnet bar (404 ), magnet connecting rods (406) are fixedly connected between adjacent external magnet bars (404) and adjacent internal magnet bars (405), a pull rope (401) is fixedly connected to the upper end of one of the magnet connecting rods (406) located between the external magnet bars (404), a vertical pole (402) is fixedly connected to the top of the distribution cabinet door (2), a rotating shaft (414) is rotatably connected to the top of the vertical pole (402), and the arc surface of the rotating shaft (414) is fixedly connected to the pull rope (401).

3. A highly sealed power distribution cabinet according to claim 2, characterized in that: The front and rear ends of the top of the paraffin storage box (305) are fixedly connected to upright blocks (407), a support rod (408) is fixedly connected between the two upright blocks (407), the middle of the support rod (408) is rotatably connected to a first steering shaft (409), the top front end of the power distribution cabinet body (1) is fixedly connected to a rotating rod (412), and the top of the rotating rod (412) is rotatably connected to a second steering shaft (413).

4. A highly sealed power distribution cabinet according to claim 2, characterized in that: The top of the paraffin storage box (305) is fixedly connected to a support stand (411), and a first spring (410) is fixedly connected between the lower end of the support stand (411) and the external magnet bar (404).

5. The highly sealed electric power distribution cabinet according to claim 1, characterized in that: The top of the distribution cabinet body (1) is provided with a threading hole and a threading hole sealing mechanism. The threading hole sealing mechanism is arranged on the back and top of the distribution cabinet body (1). The threading hole sealing mechanism comprises a suction fan (501) fixedly connected to the back of the distribution cabinet body (1). The suction port of the suction fan (501) is fixedly connected to a suction pipe (502). The end of the suction pipe (502) away from the suction fan (501) passes through the inside of the distribution cabinet body (1). A rubber sleeve (507) is fixedly connected to the opening of the threading hole, and a rubber ring (508) is fixedly connected to the upper end of the rubber sleeve (507). A rubber plug (509) is movably connected inside the rubber ring (508).

6. A highly sealed power distribution cabinet according to claim 5, characterized in that: The top of the distribution cabinet body (1) is fixedly connected to an annular seat (503), the rubber sleeve (507) is located on the inner side of the annular seat (503), the upper end of the annular seat (503) is fixedly connected to three vertical plates (504), and the top end of the vertical plate (504) is fixedly connected to a clamping plate (505).

7. A highly sealed electric power distribution cabinet according to claim 6, characterized in that: A triangular support plate (506) is fixedly connected at the turning point between the vertical plate (504) and the clamping plate (505).

8. The highly sealed electric power distribution cabinet according to claim 5, characterized in that: A sealing ring (601) is fixedly connected to the interior of the air suction pipe (502), and a blocking ball (602) is arranged inside the air suction pipe (502).

9. A highly sealed electric power distribution cabinet according to claim 8, characterized in that: The diameter of the blocking ball (602) is larger than the diameter of the sealing ring (601) and smaller than the inner diameter of the air suction pipe (502).

10. The highly sealed electric power distribution cabinet according to claim 8, characterized in that: A support frame (604) is fixedly connected to the interior of the air suction pipe (502), and a second spring (603) is fixedly connected between the support frame (604) and the blocking ball (602).

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