A MNS type switch cabinet line protection structure

Abstract

The present invention discloses a MNS type switch cabinet line protection structure, and relates to the technical field of MNS type switch cabinets. The MNS type switch cabinet line protection structure comprises a cabinet body and a plurality of drawers arranged on the switch cabinet body, the cabinet body is provided with a plurality of slots, and the slots are provided with jacks, the drawer is provided with a plug assembly, the plug assembly is electrically connected to the internal circuit, and a plurality of plug blocks are provided on the plug assembly, the plug assembly is connected to the inner wall of the drawer through a first reset mechanism, and the movement of the drawer is driven by a driving mechanism, and the side wall of the drawer is provided with a plurality of mounting holes arranged in an array. The MNS type switch cabinet line protection structure can prevent the plug blocks on the plug assembly from being contaminated and collided by impurities before plugging, and can blow and clean the jacks in the slots during the plugging process to ensure the connection effect of the plug blocks and the slots, and ensure the normal operation of the circuit, so as to protect the circuit.

Description

Technical Field

[0001] The invention relates to the technical field of MNS type switch cabinets, and in particular to a line protection structure of an MNS type switch cabinet. Background Art

[0002] MNS low-voltage withdrawable switchgear is a switchgear widely used in various low-voltage power distribution systems. It is suitable for power plants, substations, petrochemicals, metallurgy and steel rolling and other factories and mines, residential areas, high-rise buildings and other places. It is used as the power, distribution and motor control center of low-voltage power distribution systems with AC 50Hz and rated working voltage of 660V and below, as well as for power conversion, distribution and control of capacitor compensation. It is mainly composed of drawers and cabinets. When in use, the drawer is inserted into the slot of the cabinet, and the plug block of the plug assembly on the drawer is inserted into the jack in the slot to connect the line.

[0003] However, when the existing MNS type switch cabinet line is in use, the plug block of the plug assembly is exposed to the outside and is easily contaminated by impurities and bumps, etc., and the jack in the slot is also easily contaminated by impurities, thereby affecting the connection effect and further affecting the normal operation of the line, and lacking protection for the line. Summary of the invention

[0004] The object of the present invention is to provide a MNS type switch cabinet line protection structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an MNS type switch cabinet line protection structure, comprising a cabinet body and a plurality of drawers arranged on the switch cabinet body, the cabinet body is provided with a plurality of slots, and the slots are provided with jacks, the drawer is provided with a plug assembly, the plug assembly is electrically connected to the internal circuit, and the plug assembly is provided with a plurality of plug blocks, the plug assembly is connected to the inner side wall of the drawer through a first reset mechanism, and the movement of the drawer is driven by a driving mechanism, the side wall of the drawer is provided with a plurality of mounting holes arranged in an array, and a cylindrical cover is fixedly inserted in each mounting hole, through holes are provided at two opposite ends of the cylindrical cover, and a rubber ring is fixedly connected between the two ends of the cylindrical cover, and an air blowing mechanism for blowing and cleaning the jack in the slot is provided at the end of the cylindrical cover;

[0006] The blowing mechanism includes an annular groove opened at the end of the cylindrical cover, and a hollow annular cover is fixedly inserted in the annular groove, and a plurality of blowing holes arranged in an array are opened at the end of the annular cover. A first inflation mechanism for inflating air into the cylindrical cover is arranged in the drawer, and a second inflation mechanism for inflating air into the annular cover is arranged in the drawer.

[0007] Preferably, the first reset mechanism includes two symmetrically arranged first T-shaped guide rods fixedly connected to the inner wall of the drawer, and the side wall of each first T-shaped guide rod is sleeved with a slider, each slider is fixed to the side wall of the plug assembly, and the side wall of each first T-shaped guide rod is sleeved with a first spring.

[0008] Preferably, the driving mechanism includes two symmetrically arranged support plates fixedly connected to the inner wall of the drawer, and the opposite side walls of the two support plates are rotatably connected to a rotating plate via a first rotating shaft, a first sliding groove is opened on the top of the rotating plate, and a first pushing pin is inserted in the first sliding groove, the first pushing pin is fixed to the top of one of the sliding blocks, and the rotation of the rotating plate is driven by the pushing mechanism.

[0009] Preferably, the pushing mechanism includes a second sliding groove opened at the top of the rotating plate, and a moving rod is inserted into the side wall of the drawer, one end of the moving rod inside the drawer is fixedly connected to a U-shaped block, two opposite side walls of the U-shaped block are fixedly connected to second pushing pins, and the second pushing pin is inserted in the second sliding groove.

[0010] Preferably, the first inflation mechanism comprises an air storage hood fixedly connected to the inner wall of the drawer, and a sliding plate is slidably connected inside the air storage hood, a telescopic mechanism is arranged between the sliding plate and the plug assembly, and a first connecting pipe is arranged between each cylindrical hood and the air storage hood.

[0011] Preferably, the second inflation mechanism includes an air intake pipe fixedly connected to the side wall of the air storage hood, and a one-way valve is arranged in the air intake pipe, a second connecting pipe is fixedly connected between each of the annular hoods and the air storage hood, and a switch mechanism is arranged on the side wall of each second connecting pipe.

[0012] Preferably, the telescopic mechanism comprises two symmetrically arranged sleeves fixedly connected to the side wall of the sliding plate, and each sleeve has a sleeve rod inserted therein, the other end of the sleeve rod is fixed to the side wall of the plug assembly, and the side wall of each sleeve is sleeved with a second spring.

[0013] Preferably, the switch mechanism comprises a fixed cover fixedly inserted on the side wall of the second connecting tube, and a sealing plate is slidably connected in the fixed cover via a moving mechanism, and a round hole is opened on the side wall of the sealing plate.

[0014] Preferably, the moving mechanism includes two symmetrically arranged fixed blocks fixedly connected to the bottom of the sealing plate, and the opposite side walls of the two fixed blocks are rotatably connected to a rotating block via a second rotating shaft, the rotating block includes an inclined surface, and the side wall of the rotating block is fixedly connected to a first stopper, the side wall of the sealing plate is fixedly connected to an L-shaped second stopper, and the sealing plate is connected to the side wall of the fixed cover via a second reset mechanism.

[0015] Preferably, the second reset mechanism includes two symmetrically arranged first connecting blocks fixedly connected to the side wall of the sealing plate, and the top of each first connecting block is fixedly connected to a second T-shaped guide rod, the side wall of each second T-shaped guide rod is sleeved with a second connecting block, the second connecting block is fixed to the side wall of the fixed cover, and the side wall of each second T-shaped guide rod is sleeved with a third spring.

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

[0017] This MNS type switch cabinet line protection structure, by providing a first air-inflating mechanism, etc., when in use, under the action of the first spring, the plug assembly is placed in the drawer for protection, and under the action of the second spring, the sliding plate can squeeze the air in the air storage cover and enter the cylindrical cover through the first connecting pipe, so that the rubber ring expands and seals the through hole, thereby preventing the plug block on the plug assembly from being contaminated and collided with impurities, ensuring the connection effect and protecting the line; by providing a pushing mechanism, etc., when the drawer is inserted into the slot, when the end of the moving rod abuts against the side wall of the slot, the second pushing pin can be driven by the U-shaped block to move in the second sliding When the plug assembly abuts against the inclined surface, the first stopper abuts against the second stopper, thereby pushing the sealing plate to move upward along the fixed cover. At the same time, the third spring is compressed. At this time, the circular hole coincides with the second connecting pipe, that is, the switch mechanism is in an open state. The compressed air in the air storage cover can enter the annular cover through the second connecting pipe and be blown out through the blowing hole, thereby blowing and cleaning the jack in the slot. At the same time, the compressed air in the rubber ring and the cylindrical cover can pass through the first connecting pipe. A connecting pipe enters the air storage cover, so that the rubber ring shrinks and resets and opens the through hole. When the plug assembly moves, when the plug assembly passes over the rotating block, the sealing plate can move downward and reset under the action of the third spring, so that the round hole and the second connecting pipe are staggered. At this time, the sealing plate can be used to seal the second connecting pipe, and the sleeve rod slides along the sleeve, and the second spring gradually resets. After the second spring is reset, when the plug assembly continues to move, it can drive the sliding plate to move synchronously, so that negative pressure is generated in the air storage cover. At the same time, the one-way valve opens. At this time, external air can enter the air storage cover through the air inlet pipe, and the plug block can be extended from the through hole and inserted into the jack, And it can ensure the connection effect between the plug block and the socket, and can protect the line. When the drawer needs to be taken out, the drawer is pulled outward, and the moving rod is gradually separated from the side wall of the slot. At this time, the plug assembly can move and reset under the action of the first spring, and drive the plug block to move into the drawer. At the same time, the air in the air storage cover is squeezed through the telescopic mechanism, and the second spring is gradually compressed, so that the air in the air storage cover is squeezed into the cylindrical cover through the first connecting pipe, so that the rubber ring expands and seals the through hole. When the plug assembly is against the rotating block, it can push the rotating block to rotate along the second rotating shaft. At this time, the sealing plate will not be pushed to move upward, that is, the switch mechanism is in a closed state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall structure of the drawer in the present invention;

[0020] Figure 3 It is a schematic diagram of the position of the blowing mechanism in the present invention;

[0021] Figure 4 It is a partial cross-sectional structural schematic diagram of the drawer in the present invention;

[0022] Figure 5 It is the internal schematic diagram of the drawer in the present invention;

[0023] Figure 6 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 7 for Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0025] Figure 8 for Figure 5 Schematic diagram of the enlarged structure at C in the middle;

[0026] Fig. 9 for Figure 5 Schematic diagram of the enlarged structure at D in the middle.

[0027] In the figure: 1. switch cabinet body; 101. cabinet body; 102. drawer; 103. slot; 104. plug assembly; 105. plug block; 2. first reset mechanism; 201. first T-shaped guide rod; 202. slider; 203. first spring; 3. drive mechanism; 301. support plate; 302. first rotating shaft; 303. first slide groove; 304. first push pin; 305. rotating plate; 4. push mechanism; 401. second slide groove; 402. moving rod; 403. U-shaped block; 404. second push pin; 5. blowing mechanism; 501. annular groove; 502. annular cover; 503. blowing hole; 6. first inflation mechanism; 601. gas storage cover; 602. sliding plate; 603 , first connecting pipe; 7, second inflation mechanism; 701, air inlet pipe; 702, second connecting pipe; 8, switch mechanism; 801, fixed cover; 802, sealing plate; 803, round hole; 9, moving mechanism; 901, fixed block; 902, second rotating shaft; 903, rotating block; 904, inclined plane; 905, first stopper; 906, second stopper; 10, second reset mechanism; 1001, first connecting block; 1002, second T-shaped guide rod; 1003, second connecting block; 1004, third spring; 11, mounting hole; 12, cylindrical cover; 13, through hole; 14, rubber ring; 15, telescopic mechanism; 1501, sleeve; 1502, sleeve rod; 1503, second spring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-Figure 9 The present invention provides a technical solution: an MNS type switch cabinet line protection structure, comprising a cabinet body 101 and a plurality of drawers 102 arranged on a switch cabinet body 1, a plurality of slots 103 are arranged on the cabinet body 101, and a socket is arranged in the slot 103, a plug assembly 104 is arranged in the drawer 102, the plug assembly 104 is electrically connected to the internal circuit, and a plurality of plug blocks 105 are arranged on the plug assembly 104, the plug assembly 104 is connected to the inner side wall of the drawer 102 through a first reset mechanism 2, and the movement of the drawer 102 is driven by a driving mechanism 3, a plurality of mounting holes 11 arranged in an array are opened on the side wall of the drawer 102, and a cylindrical cover 12 is fixedly inserted in each mounting hole 11, a through hole 13 is opened at two opposite ends of the cylindrical cover 12, and a rubber ring 14 is fixedly connected between the two ends of the cylindrical cover 12, and a blowing mechanism 5 for blowing and cleaning the socket in the slot 103 is arranged at the end of the cylindrical cover 12;

[0030] The blowing mechanism 5 includes an annular groove 501 provided at the end of the cylindrical cover 12, and a hollow annular cover 502 is fixedly inserted in the annular groove 501, and a plurality of blowing holes 503 arranged in an array are provided at the end of the annular cover 502. A first inflation mechanism 6 for inflating air into the cylindrical cover 12 is provided in the drawer 102, and a second inflation mechanism 7 for inflating air into the annular cover 502 is provided in the drawer 102. Before plugging in, the plug block 105 on the plug assembly 104 can be prevented from being contaminated by impurities and collisions. During the plugging process, the socket in the slot 103 can be blown and cleaned to ensure the connection effect between the plug block 105 and the slot 103 and the normal operation of the line, thereby protecting the line.

[0031] The first reset mechanism 2 includes two symmetrically arranged first T-shaped guide rods 201 fixedly connected to the inner wall of the drawer 102, and the side wall of each first T-shaped guide rod 201 is provided with a slider 202, each slider 202 is fixed to the side wall of the plug assembly 104, and the side wall of each first T-shaped guide rod 201 is provided with a first spring 203, which guides and resets the movement of the plug assembly 104.

[0032] The driving mechanism 3 includes two symmetrically arranged support plates 301 fixedly connected to the inner wall of the drawer 102, and the opposite side walls of the two support plates 301 are rotatably connected with a rotating plate 305 through a first rotating shaft 302, a first sliding groove 303 is opened on the top of the rotating plate 305, and a first pushing pin 304 is inserted in the first sliding groove 303, the first pushing pin 304 is fixed to the top of one of the sliders 202, and the rotation of the rotating plate 305 is driven by the pushing mechanism 4. When the drawer 102 is inserted into the slot 103, the rotating plate 305 is pushed to rotate along the first rotating shaft 302 by the pushing mechanism 4, and the first pushing pin 304 slides in the first sliding groove 303, thereby pushing the plug assembly 104 to move toward the direction close to the mounting hole 11.

[0033] The pushing mechanism 4 includes a second slide groove 401 opened at the top of the rotating plate 305, and a moving rod 402 is inserted into the side wall of the drawer 102, and one end of the moving rod 402 in the drawer 102 is fixedly connected to a U-shaped block 403, and two opposite side walls of the U-shaped block 403 are fixedly connected to second push pins 404, and the second push pins 404 are inserted in the second slide groove 401. When the drawer 102 is inserted into the slot 103, when the end of the moving rod 402 abuts against the side wall of the slot 103, The U-shaped block 403 can drive the second push pin 404 to slide in the second slide groove 401, thereby pushing the rotating plate 305 to rotate along the first rotating shaft 302. Through the arrangement of the first rotating shaft 302, the rotating plate 305 and the moving rod 402, a lever effect can be formed, so that when the force pushing the moving rod 402 is small, a greater thrust can be exerted on the plug assembly 104, so that the plug assembly 104 moves outward, and the first spring 203 can be compressed and stored.

[0034] The first inflation mechanism 6 includes an air storage hood 601 fixedly connected to the inner wall of the drawer 102, and a sliding plate 602 is slidably connected inside the air storage hood 601, a telescopic mechanism 15 is arranged between the sliding plate 602 and the plug assembly 104, and a first connecting pipe 603 is arranged between each cylindrical cover 12 and the air storage hood 601. When the drawer 102 needs to be taken out, the drawer 102 is pulled outward, and the moving rod 402 gradually separates from the side wall of the slot 103. At this time, the plug assembly 104 can move and reset under the action of the first spring 203, and drive the plug block 105 to move into the drawer 102. At the same time, the air in the air storage hood 601 is squeezed by the telescopic mechanism 15, and the second spring 1503 is gradually compressed, so that the air in the air storage hood 601 is squeezed into the cylindrical cover 12 through the first connecting pipe 603, so that the rubber ring 14 expands and seals the through hole 13.

[0035] The second inflation mechanism 7 includes an air inlet pipe 701 fixedly connected to the side wall of the air storage cover 601, and a one-way valve is arranged in the air inlet pipe 701. The conduction direction of the one-way valve is from the outside to the inside of the air storage cover 601. A second connecting pipe 702 is fixedly connected between each annular cover 502 and the air storage cover 601, and a switch mechanism 8 is arranged on the side wall of each second connecting pipe 702. When the drawer 102 is inserted into the slot 103, the switch mechanism 8 is opened. At this time, the compressed air in the air storage cover 601 can enter the annular cover 502 through the second connecting pipe 702 and be blown out through the blowing hole 503, so that the socket in the slot 103 can be blown and cleaned.

[0036] The telescopic mechanism 15 includes two symmetrically arranged sleeves 1501 fixedly connected to the side wall of the sliding plate 602, and each sleeve 1501 is inserted with a sleeve rod 1502, the other end of the sleeve rod 1502 is fixed to the side wall of the plug assembly 104, and the side wall of each sleeve 1501 is sleeved with a second spring 1503. When the drawer 102 needs to be taken out, the drawer 102 is pulled outward, and the moving rod 402 gradually separates from the side wall of the slot 103. At this time, the plug assembly 104 can move and reset under the action of the first spring 203, and drive the plug block 105 to move into the drawer 102. At the same time, the air in the air storage cover 601 is squeezed by the telescopic mechanism 15, and the second spring 1503 is gradually compressed.

[0037] The switch mechanism 8 includes a fixed cover 801 fixedly inserted on the side wall of the second connecting tube 702, and a sealing plate 802 is slidably connected to the fixed cover 801 through a moving mechanism 9. A circular hole 803 is opened on the side wall of the sealing plate 802. The sealing plate 802 is driven by the moving mechanism 9 to move upward along the fixed cover 801. At the same time, the third spring 1004 is compressed. At this time, the circular hole 803 coincides with the second connecting tube 702, that is, the switch mechanism 8 is in an open state.

[0038] The moving mechanism 9 includes two symmetrically arranged fixed blocks 901 fixedly connected to the bottom of the sealing plate 802, and the opposite side walls of the two fixed blocks 901 are rotatably connected with a rotating block 903 through a second rotating shaft 902, the rotating block 903 includes an inclined surface 904, and the side wall of the rotating block 903 is fixedly connected with a first stopper 905, the side wall of the sealing plate 802 is fixedly connected with an L-shaped second stopper 906, and the sealing plate 802 is connected to the side wall of the fixed cover 801 through a second reset mechanism 10. When the drawer 102 is inserted into the slot 103, when the plug assembly 104 abuts against the inclined surface 904, at this time, the first The stopper 905 abuts against the second stopper 906, thereby pushing the sealing plate 802 to move upward along the fixed cover 801. When the drawer 102 needs to be taken out, the drawer 102 is pulled outward, and the moving rod 402 gradually separates from the side wall of the slot 103. At this time, the plug assembly 104 can move and reset under the action of the first spring 203, and drive the plug block 105 to move into the drawer 102. When the plug assembly 104 abuts against the rotating block 903, it can push the rotating block 903 to rotate along the second rotating shaft 902. At this time, the sealing plate 802 will not be pushed to move upward, that is, the switch mechanism 8 is in a closed state.

[0039] The second reset mechanism 10 includes two symmetrically arranged first connecting blocks 1001 fixedly connected to the side wall of the sealing plate 802, and the top of each first connecting block 1001 is fixedly connected to the second T-shaped guide rod 1002, the side wall of each second T-shaped guide rod 1002 is sleeved with a second connecting block 1003, the second connecting block 1003 is fixed to the side wall of the fixed cover 801, and the side wall of each second T-shaped guide rod 1002 is sleeved with a third spring 1004, which plays a guiding and reset role in the movement of the sealing plate 802.

[0040] Working principle: When in use, under the action of the first spring 203, the plug assembly 104 is placed in the drawer 102 for protection, and under the action of the second spring 1503, the sliding plate 602 can squeeze the air in the air storage cover 601 and enter the cylindrical cover 12 through the first connecting pipe 603, so that the rubber ring 14 expands and seals the through hole 13, thereby preventing the plug block 105 on the plug assembly 104 from being contaminated by impurities and collision, ensuring the connection effect and protecting the line;

[0041] When the drawer 102 is inserted into the slot 103, when the end of the moving rod 402 abuts against the side wall of the slot 103, the U-shaped block 403 can drive the second push pin 404 to slide in the second slide groove 401, thereby pushing the rotating plate 305 to rotate along the first rotating shaft 302, and making the first push pin 304 slide in the first slide groove 303, thereby pushing the plug assembly 104 to move in the direction close to the mounting hole 11. At the same time, the first spring 203 is compressed. When the plug assembly 104 abuts against the inclined surface 904, at this time, the first stop block 905 and The second stopper 906 abuts against the rotating block 903. At this time, the rotating block 903 cannot rotate counterclockwise, so that the plug assembly 104 can slide along the inclined surface 904, thereby pushing the sealing plate 802 to move upward along the fixed cover 801. At the same time, the third spring 1004 is compressed. At this time, the circular hole 803 overlaps with the second connecting pipe 702, that is, the switch mechanism 8 is in the open state, and the compressed air in the air storage cover 601 can enter the annular cover 502 through the second connecting pipe 702 and be blown out through the blowing hole 503, so that the plug hole in the slot 103 can be blown and cleaned;

[0042] At the same time, the rubber ring 14 and the compressed air in the cylindrical cover 12 can enter the air storage cover 601 through the first connecting pipe 603, so that the rubber ring 14 shrinks and resets and opens the through hole 13. When the plug assembly 104 moves, when the plug assembly 104 passes over the rotating block 903, the sealing plate 802 can move downward and reset under the action of the third spring 1004, so that the circular hole 803 and the second connecting pipe 702 are staggered. At this time, the sealing plate 802 can be used to block and seal the second connecting pipe 702, and the sleeve The rod 1502 slides along the sleeve 1501, and the second spring 1503 gradually resets. After the second spring 1503 is reset, when the plug assembly 104 continues to move, it can drive the sliding plate 602 to move synchronously, so that negative pressure is generated in the air storage cover 601. At the same time, the one-way valve opens. At this time, the external air can enter the air storage cover 601 through the air inlet pipe 701, and the plug block 105 can be extended from the through hole 13 and inserted into the socket, so that the connection effect between the plug block 105 and the socket can be ensured, and the line can be protected;

[0043] When the drawer 102 needs to be taken out, the drawer 102 is pulled outward, and the moving rod 402 gradually separates from the side wall of the slot 103. At this time, the plug assembly 104 can move and reset under the action of the first spring 203, and drive the plug block 105 to move into the drawer 102. At the same time, the sliding plate 602 is driven to move synchronously through the telescopic mechanism 15, so that the air in the air storage cover 601 can be squeezed to form high pressure and temporarily stored for blowing when the subsequent drawer 102 is inserted into the slot 103. In addition, the second spring 1503 is gradually compressed. The first connecting tube 603 is used to connect the plug assembly 104 and the rotating block 903 to the cylindrical cover 12, thereby squeezing the air in the air storage cover 601 into the cylindrical cover 12 through the first connecting tube 603, so that the rubber ring 14 expands and seals the through hole 13. When the plug assembly 104 abuts against the rotating block 903, the rotating block 903 can be pushed to rotate clockwise along the second rotating shaft 902. At this time, the sealing plate 802 will not be pushed to move upward, that is, the switch mechanism 8 is in a closed state. Moreover, after the rotating block 903 rotates, the lowest point of the first stopper 905 is still higher than the height of the plug assembly 104, ensuring its normal movement and avoiding interference.

Claims

1. An MNS type switch cabinet line protection structure, comprising a cabinet body (101) and a plurality of drawers (102) arranged on a switch cabinet body (1), the cabinet body (101) being provided with a plurality of slots (103), and the slots (103) being provided with jacks, a plug assembly (104) being provided in the drawer (102), the plug assembly (104) being electrically connected to an internal circuit, and a plurality of plug blocks (105) being provided on the plug assembly (104), characterized in that: The plug assembly (104) is connected to the inner wall of the drawer (102) via a first reset mechanism (2), and the movement of the drawer (102) is driven by a drive mechanism (3); a plurality of mounting holes (11) arranged in an array are provided on the side wall of the drawer (102), and a cylindrical cover (12) is fixedly inserted in each mounting hole (11); two opposite ends of the cylindrical cover (12) are provided with through holes (13), and a rubber ring (14) is fixedly connected between the two ends of the cylindrical cover (12); and a blowing mechanism (5) for blowing and cleaning the plug hole in the slot (103) is provided at the end of the cylindrical cover (12); The blowing mechanism (5) comprises an annular groove (501) provided at the end of the cylindrical cover (12), and a hollow annular cover (502) is fixedly inserted in the annular groove (501); a plurality of blowing holes (503) arranged in an array are provided at the end of the annular cover (502); a first inflating mechanism (6) for inflating air into the cylindrical cover (12) is provided in the drawer (102), and a second inflating mechanism (7) for inflating air into the annular cover (502) is provided in the drawer (102); The first reset mechanism (2) comprises two symmetrically arranged first T-shaped guide rods (201) fixedly connected to the inner side wall of the drawer (102), and the side wall of each first T-shaped guide rod (201) is sleeved with a slider (202), each slider (202) is fixed to the side wall of the plug assembly (104), and the side wall of each first T-shaped guide rod (201) is sleeved with a first spring (203), and the driving mechanism (3) comprises two symmetrically arranged support plates (301) fixedly connected to the inner side wall of the drawer (102), and the opposite side walls of the two support plates (301) are rotatably connected to a rotating plate (305) via a first rotating shaft (302), and the top of the rotating plate (305) is provided with a first sliding groove (303). 03), and a first push pin (304) is inserted into the first slide groove (303), the first push pin (304) is fixed to the top of one of the sliders (202), and the rotation of the rotating plate (305) is driven by a push mechanism (4), the push mechanism (4) comprises a second slide groove (401) opened at the top of the rotating plate (305), and a moving rod (402) is inserted into the side wall of the drawer (102), one end of the moving rod (402) in the drawer (102) is fixedly connected to a U-shaped block (403), two opposite side walls of the U-shaped block (403) are fixedly connected to second push pins (404), and the second push pin (404) is inserted into the second slide groove (401). The first inflation mechanism (6) comprises an air storage cover (601) fixedly connected to the inner wall of the drawer (102), and a sliding plate (602) is slidably connected in the air storage cover (601), a telescopic mechanism (15) is provided between the sliding plate (602) and the plug assembly (104), and a first connecting pipe (603) is provided between each cylindrical cover (12) and the air storage cover (601), the second inflation mechanism (7) comprises an air intake pipe (701) fixedly connected to the side wall of the air storage cover (601), and a one-way valve is provided in the air intake pipe (701), a second connecting pipe (702) is fixedly connected between each annular cover (502) and the air storage cover (601), and each second connecting pipe (703) is provided between the annular cover (502) and the air storage cover (601), and each second connecting pipe (703) is provided between the annular cover (502) and the air storage cover (601). 2) is provided with a switch mechanism (8), the telescopic mechanism (15) comprises two symmetrically arranged sleeves (1501) fixedly connected to the side wall of the sliding plate (602), and each sleeve (1501) is inserted with a sleeve rod (1502), the other end of the sleeve rod (1502) is fixed to the side wall of the plug assembly (104), and the side wall of each sleeve (1501) is sleeved with a second spring (1503), the switch mechanism (8) comprises a fixed cover (801) fixedly inserted into the side wall of the second connecting tube (702), and a sealing plate (802) is slidably connected to the fixed cover (801) via a moving mechanism (9), and a round hole (803) is opened on the side wall of the sealing plate (802).

2. According to claim 1, the MNS type switch cabinet line protection structure is characterized in that: The moving mechanism (9) comprises two symmetrically arranged fixed blocks (901) fixedly connected to the bottom of the sealing plate (802), and the opposite side walls of the two fixed blocks (901) are rotatably connected to a rotating block (903) via a second rotating shaft (902), the rotating block (903) comprises an inclined surface (904), and the side wall of the rotating block (903) is fixedly connected to a first stopper (905), the side wall of the sealing plate (802) is fixedly connected to a second stopper (906) arranged in an L shape, and the sealing plate (802) is connected to the side wall of the fixed cover (801) via a second resetting mechanism (10).

3. According to claim 2, a MNS type switch cabinet line protection structure is characterized in that: The second reset mechanism (10) comprises two symmetrically arranged first connection blocks (1001) fixedly connected to the side wall of the sealing plate (802), and the top of each first connection block (1001) is fixedly connected to a second T-shaped guide rod (1002), the side wall of each second T-shaped guide rod (1002) is sleeved with a second connection block (1003), the second connection block (1003) is fixed to the side wall of the fixed cover (801), and the side wall of each second T-shaped guide rod (1002) is sleeved with a third spring (1004).

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