Power distribution switch assembly and power distribution cabinet

Abstract

The invention discloses a power distribution switch assembly and a power distribution cabinet, and relates to the technical field of power distribution cabinets, the power distribution switch assembly comprises a conductive unit and a plugging unit, the conductive unit and the plugging unit are correspondingly arranged, and two sides between the conductive unit and the plugging unit are symmetrically provided with limiting units; a sealing unit is arranged between the conductive unit and the plugging unit, the conductive unit comprises a fixed seat, guide holes are uniformly formed in the end part of the fixed seat in a penetrating manner, binding posts are fixedly arranged in the guide holes, a butt joint groove is formed in one end of the interior of each binding post, and the plugging unit comprises a movable seat; according to the invention, the wiring position of the switch can be effectively sealed, external moisture and impurities can be prevented from entering the switch, in addition, when high temperature is generated at the wiring position, rapid heat dissipation and cooling can be realized, normal work of the switch can be guaranteed, and in addition, when a fire occurs in the power distribution cabinet, connection between the power distribution cabinet and an external power supply can be timely cut off, and external load equipment can be protected.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution cabinets, and in particular to a power distribution switch assembly and a power distribution cabinet. Background Art

[0002] A distribution cabinet is a special device used to distribute, control and protect electric energy in a power system. It is usually composed of a cabinet, circuit breakers, disconnectors, transformers, electric meters and other parts. The distribution cabinet monitors, controls and protects the power system through distribution switches and protection devices to ensure safe and stable power supply.

[0003] A Chinese patent with application number 2019100899373 discloses a switch unit and a distribution cabinet. The switch unit includes a front panel, a bottom panel and a rear panel. The front panel is provided with a handle and an operating window. A rotary operating mechanism, a worm propulsion mechanism and a circuit breaker are provided between the front panel and the rear panel. The handle is connected to the circuit breaker contact drive through the rotary operating mechanism; the worm propulsion mechanism is arranged on the inner side of the operating window on the front panel; the rear panel is provided with an incoming line connector, an outgoing line connector and a signal connector; the circuit breaker is electrically connected to the incoming line connector and the outgoing line connector; the distribution cabinet is provided with at least one of the above-mentioned switch units. However, during use, the sealing is poor, and external moisture and dust impurities will enter the interior, causing damage to the switch.

[0004] In addition, when high temperature is generated at the switch connection, it is difficult to dissipate the heat and cool it down in time, which will cause damage to the switch. In addition, when a fire occurs inside the distribution cabinet, the connection between the distribution cabinet and the external power supply cannot be cut off in time, which is prone to short circuit and damage to external load equipment. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a distribution switch assembly and a distribution cabinet, which can effectively seal the wiring of the switch to prevent the entry of external moisture and impurities. In addition, when high temperature is generated at the wiring, rapid heat dissipation and cooling can be achieved to ensure the normal operation of the switch. In addition, when a fire occurs inside the distribution cabinet, the connection between the distribution cabinet and the external power supply can be cut off in time to protect the external load equipment, which can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a power distribution switch assembly, comprising a conductive unit and a plug-in unit, wherein the conductive unit and the plug-in unit are arranged correspondingly, and limit units are symmetrically arranged on both sides between the conductive unit and the plug-in unit, and a sealing unit is arranged between the conductive unit and the plug-in unit;

[0007] The conductive unit comprises a fixing seat, the end of the fixing seat is evenly penetrated with guide holes, a terminal is fixed in the guide hole, and a docking groove is provided at one end of the terminal;

[0008] The plug-in unit comprises a movable seat, a guide cylinder is evenly provided through the side of the movable seat, a conductive column is provided at the end of the guide cylinder, and a plug-in column is provided at one end of the conductive column close to the guide hole;

[0009] The limiting unit includes two correspondingly arranged side seats, a U-shaped seat is provided on the side of the side seat, a movable arm is rotatably connected to the end of the U-shaped seat, a telescopic rod is provided at the end of the movable arm, and a locking mechanism for limiting the movable arm is provided on the U-shaped seat;

[0010] The sealing unit includes a sealing seat and an electric telescopic part. The sealing seat is sleeved on the outside of each conductive column through a matching hole opened on the side. A bellows is provided between the ends of the sealing seat and the fixed seat. Both sides of the ends of the bellows are fixedly connected with air ducts, and the air duct is provided with a solenoid valve.

[0011] Furthermore, the fixed seat and the movable seat are both made of insulating material, the movable seat is arranged corresponding to the fixed seat, the guide cylinder corresponds to the guide hole position, the conductive column is provided with a wiring groove at one end close to the movable seat, a fixing stud is threadedly connected to the wiring groove, and a handle is provided on the circumferential surface of the movable seat through the support seat.

[0012] Furthermore, the two side seats are symmetrically arranged on both sides of the fixed seat;

[0013] The end of the telescopic rod is movably connected to the side of the movable seat through a hinge seat, and the outside of the telescopic rod is sleeved with a limit spring.

[0014] Furthermore, the locking mechanism includes an arc-shaped tooth seat and a support plate, a guide rod is movably passed through the side of the support plate, a mounting seat is provided at the outer end of the guide rod, a wedge block is provided at the end of the mounting seat, a baffle is provided at the inner end of the guide rod, and the port of the air guide tube corresponds to the position of the baffle.

[0015] Furthermore, the arc-shaped tooth seat is arranged at one end of the movable arm located in the U-shaped seat, the support plate is arranged in the U-shaped seat, the end of the wedge block corresponds to the tooth groove of the arc-shaped tooth seat, and the outside of the guide rod is located between the support plate and the mounting seat and is sleeved with a buffer spring, and the two ends of the buffer spring are respectively fixedly connected to the mounting seat and the support plate.

[0016] Furthermore, the sealing seat is made of insulating material, and a sealing ring is provided inside the matching hole at one end close to the fixing seat;

[0017] An elastic sleeve is arranged between the sealing seat and the end of the movable seat, and the end of the elastic sleeve is detachably connected to the sealing seat via an annular seat.

[0018] Furthermore, an air inlet valve and an air exhaust valve are provided at the end of the bellows, a temperature sensor is provided inside the bellows, and one end of the bellows close to the sealing seat is detachably connected to the outside of the sealing seat;

[0019] The electric telescopic part is arranged on the movable seat, and the telescopic end of the electric telescopic part is fixedly connected to the outside of the sealing seat.

[0020] The present invention also provides a power distribution cabinet, comprising the power distribution switch assembly as described above, the power distribution cabinet comprising a cabinet body, both sides of the cabinet body are respectively provided with a wire outlet hole and a wire inlet hole, a smoke sensor is provided on the inner top side of the cabinet body, the fixing seat passes through and is fixedly connected in the wire inlet hole, a cabinet door is movably connected to the side of the cabinet body, and heat dissipation grooves are provided on the bottom of both sides of the cabinet body.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. When the joint position of the plug-in column and the docking groove is at high temperature, the electric telescopic part drives the bellows to reciprocate through the sealing seat. When the bellows contracts, the exhaust valve opens and the internal high-temperature gas is discharged. When the bellows extends, the intake valve opens and the external air is drawn into the bellows. Therefore, the high-temperature air inside the bellows is replaced with the normal-temperature air through the expansion and contraction of the bellows, thereby reducing the temperature inside the bellows.

[0023] 2. When there is a fire in the cabinet, the present invention causes the electric telescopic part to extend rapidly, the bellows to compress rapidly, the solenoid valve to open, and the gas in the bellows to rush to the baffle through the air guide pipe, causing the baffle to move to the side away from the bellows, the wedge block is disengaged from the arc-shaped gear seat, the compressed limit spring is released, the fixed seat and the movable seat are quickly separated, and the electrical connection between the cabinet and the external power supply is quickly cut off, thereby protecting external equipment and electrical components in the cabinet.

[0024] 3. After long-term use, the present invention cuts off the power supply of the plug-in column to separate the fixed seat and the movable seat, and uses the electric telescopic part to drive the sealing seat to drive the sealing ring to reciprocate. When the sealing ring reciprocates, the oxide layer and corrosion layer on the surface of the plug-in column are scraped off to ensure good conductivity of the plug-in column and avoid poor contact with the docking groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the power distribution cabinet of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the power distribution switch assembly of the present invention;

[0028] Figure 4This is a schematic diagram of the shaft side structure of the power distribution switch assembly of the present invention;

[0029] Figure 5 It is a schematic cross-sectional structural diagram of the power distribution switch assembly of the present invention.

[0030] In the figure: 1, cabinet; 101, outlet hole; 102, inlet hole; 103, cabinet door; 104, heat dissipation slot; 2, conductive unit; 201, fixed seat; 202, guide hole; 203, terminal post; 204, docking slot; 3, plug-in unit; 301, movable seat; 302, guide cylinder; 303, conductive post; 304, terminal slot; 305, plug-in post; 306, handle; 4, limit unit; 401, side seat; 402, U-shaped seat; 403, movable arm; 404, telescopic rod; 405. Articulated seat; 406. Limit spring; 407. Arc-shaped tooth seat; 408. Support plate; 409. Guide rod; 410. Mounting seat; 411. Wedge block; 412. Buffer spring; 413. Baffle; 5. Sealing unit; 501. Sealing seat; 502. Matching hole; 503. Sealing ring; 504. Bellows; 505. Electric telescopic part; 506. Elastic sleeve; 507. Annular seat; 508. Inlet valve; 509. Exhaust valve; 510. Air guide pipe; 511. Solenoid valve. DETAILED DESCRIPTION

[0031] 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.

[0032] See also Figure 1-5 The present invention provides a power distribution cabinet, including a power distribution switch assembly, wherein the power distribution cabinet includes a cabinet body 1, and both sides of the cabinet body 1 are respectively provided with a wire outlet hole 101 and a wire inlet hole 102, the wire outlet hole 101 is used for leading out the output end of the power cable in the cabinet body 1, and the wire inlet hole 102 is used for introducing the electric energy outside the cabinet body 1, a cabinet door 103 is movably connected to the side of the cabinet body 1, and heat dissipation grooves 104 are provided at the bottom of both sides of the cabinet body 1.

[0033] The present invention further provides a power distribution switch assembly, comprising a conductive unit 2 and a plug-in unit 3, wherein the conductive unit 2 and the plug-in unit 3 are arranged correspondingly.

[0034] The conductive unit 2 includes a fixing seat 201, which passes through and is fixedly connected to the wire entry hole 102. The end of the fixing seat 201 is evenly penetrated with a guide hole 202, and a terminal 203 is fixed in the guide hole 202. The terminal 203 is used to connect the cables inside the cabinet 1. One end of the terminal 203 is provided with a docking groove 204, which is used to dock with the plug-in column 305, and external electrical energy is introduced into the electrical components in the cabinet 1 through the terminal 203.

[0035] The plug-in unit 3 includes a movable seat 301, and the fixed seat 201 and the movable seat 301 are both made of insulating material. The movable seat 301 is arranged corresponding to the fixed seat 201. A guide cylinder 302 is evenly penetrated on the side of the movable seat 301. The guide cylinder 302 corresponds to the position of the guide hole 202. A conductive column 303 is arranged at the end of the guide cylinder 302. A wiring groove 304 is opened at one end of the conductive column 303 close to the movable seat 301. A fixing stud is threadedly connected to the wiring groove 304. A plug-in column 305 is arranged at one end of the conductive column 303 close to the guide hole 202. After the plug-in column 305 is plugged into the docking groove 204, , insert the end of the cable with the peeled outer skin into the guide cylinder 302, and extend the exposed end of the cable into the wiring groove 304. By tightening the fixing stud, the end of the fixing stud presses the cable to fix the end of the cable in the wiring groove 304. The external electric energy is introduced into the terminal 203 through the cable, the conductive column 303 and the plug-in column 305 in sequence to realize power supply to the interior of the cabinet 1. When tightening the fixing stud, it is necessary to first disassemble and separate the elastic sleeve 506 from the sealing seat 501 to facilitate the rotation of the fixing stud. After tightening, the end of the elastic sleeve 506 is connected to the sealing seat 501.

[0036] A handle 306 is provided on the circumferential surface of the movable seat 301 through the support seat. The handle 306 facilitates the staff to apply horizontal thrust to insert the plug-in column 305 into the docking groove 204. The handle 306 is coated with an insulating layer.

[0037] The limiting units 4 are symmetrically arranged on both sides between the conductive unit 2 and the plug-in unit 3. The limiting units 4 include two correspondingly arranged side seats 401. The two side seats 401 are symmetrically arranged on both sides of the fixed seat 201. A U-shaped seat 402 is arranged on the side of the side seat 401. The end of the U-shaped seat 402 is rotatably connected with a movable arm 403. The end of the movable arm 403 is provided with a telescopic rod 404. The end of the telescopic rod 404 is movably connected to the side of the movable seat 301 through a hinge seat 405. The outer sleeve of the telescopic rod 404 is connected with a limiting spring 406. When the movable seat 301 is pushed toward the fixed seat 201 by the handle 306, the telescopic rod 404 and the movable arm 403 in the inclined state approach the horizontal state, the telescopic rod 404 gradually shrinks, the limit spring 406 is compressed, and during the movement of the movable seat 301, the locking mechanism always keeps the movable arm 403 in the locked state. After the plug-in column 305 is completely docked with the docking groove 204, the telescopic rod 404 and the movable arm 403 are still in the inclined state, and there is a gap between the sealing seat 501 and the fixed seat 201.

[0038] The U-shaped seat 402 is provided with a locking mechanism for limiting the movable arm 403, and the locking mechanism includes an arc-shaped tooth seat 407 and a support plate 408. The arc-shaped tooth seat 407 is provided at one end of the movable arm 403 located in the U-shaped seat 402, and the support plate 408 is provided in the U-shaped seat 402. A guide rod 409 is movably penetrated through the side of the support plate 408, and a mounting seat 410 is provided at one end of the guide rod 409. A wedge block 411 is provided at the end of the mounting seat 410, and the inclined surface of the wedge block 411 faces one side of the side seat 401. The end of the wedge block 411 corresponds to the tooth groove of the arc-shaped tooth seat 407. The outside of the guide rod 409 is located between the support plate 408 and the mounting seat 410. A buffer spring 412 is sleeved in the position between them, and the two ends of the buffer spring 412 are fixedly connected to the mounting seat 410 and the support plate 408 respectively. A baffle 413 is provided at one end of the guide rod 409. When the movable seat 301 moves toward the fixed seat 201, the movable arm 403 drives the arc-shaped tooth seat 407 to rotate. At the same time, the arc-shaped tooth seat 407 corresponds to the end of the wedge block 411. Under the action of the buffer spring 412, each time the end of the wedge block 411 passes through a tooth groove on the arc-shaped tooth seat 407, the mounting seat 410 reciprocates once to always keep the movable arm 403 limited to prevent the movable arm 403 from moving in the opposite direction.

[0039] A sealing unit 5 is provided between the conductive unit 2 and the plug-in unit 3. The sealing unit 5 includes a sealing seat 501 and an electric telescopic portion 505. The sealing seat 501 is made of an insulating material. The sealing seat 501 is sleeved on the outside of each conductive column 303 through a matching hole 502 opened on the side. The diameter of the matching hole 502 is larger than the diameter of the plug-in column 305. The sealing seat 501 and the conductive column 303 are movably sleeved so that the sealing seat 501 slides along the conductive column 303. A sealing ring 503 is provided at one end of the matching hole 502 near the fixed seat 201. The sealing ring 503 is provided at the inner side of the matching hole 502. 03 is sleeved on the outside of the plug-in column 305, the sealing ring 503 is made of insulating material, and the inner side of the sealing ring 503 is in contact with the circumferential surface of the plug-in column 305 to seal the inside of the matching hole 502, and a bellows 504 is provided between the sealing seat 501 and the end of the fixing seat 201, and the end of the bellows 504 close to the sealing seat 501 is detachably connected to the outside of the sealing seat 501, and the bellows 504 is used to achieve sealing between the sealing seat 501 and the fixing seat 201 to prevent the plug-in column 305 from being directly exposed to the air and excessively contacted with moisture and dust impurities.

[0040] An elastic sleeve 506 is provided between the sealing seat 501 and the end of the movable seat 301 . The end of the elastic sleeve 506 is detachably connected to the sealing seat 501 via an annular seat 507 . The elastic sleeve 506 can seal the exposed conductive column 303 when the sealing seat 501 slides.

[0041] The electric telescopic part 505 is arranged on the movable seat 301 , and the telescopic end of the electric telescopic part 505 is fixedly connected to the outside of the sealing seat 501 . The electric telescopic part 505 is preferably an electromagnetic telescopic mechanism for driving the linear sliding of the sealing seat 501 .

[0042] When in use, the cables in the cabinet 1 and the external power supply cables are respectively connected to the ends of the terminal 203 and the terminal slot 304. When external electrical energy needs to be supplied to the interior of the cabinet 1, the staff pushes the movable seat 301 toward the fixed seat 201 by holding the handle 306. At this time, the movable arm 403 rotates, and the telescopic rod 404 and the limit spring 406 gradually shrink. At the same time, the end of the wedge block 411 limits the movable arm 403 by engaging with the tooth groove of the arc-shaped tooth seat 407, until the end of the plug-in column 305 is fully matched with the docking slot 204, the external electrical energy can be introduced into the electrical components in the cabinet 1. At the same time, the wedge block 411 maintains the clamping limit on the arc-shaped tooth seat 407. At this time, the limit spring 406 is in a compressed energy storage state.

[0043] However, during long-term use, the junction of the plug-in column 305 and the docking slot 204 will generate high temperature, and the high temperature will cause the plug-in column 305 to deform and increase the resistance value, affecting the normal power supply in the cabinet 1. Therefore, the following improvements are made:

[0044] A temperature sensor is provided inside the bellows 504 , and the temperature sensor is used to detect the temperature inside the bellows 504 , so as to indirectly determine the temperature of the connection point between the conductive unit 2 and the plug-in unit 3 .

[0045] An air intake valve 508 and an air exhaust valve 509 are provided at the end of the bellows 504, and the air intake valve 508 and the air exhaust valve 509 realize one-way air intake and one-way air exhaust respectively.

[0046] During use, when the temperature sensor detects that the temperature inside the bellows 504 is greater than the set threshold, it actively determines that the joint position of the plug-in column 305 and the docking groove 204 is in a high temperature state. At this time, the electric telescopic part 505 is started to reciprocate and reciprocate and drive the sealing seat 501 to reciprocate, so that the bellows 504 reciprocates and reciprocates. When the bellows 504 is compressed, the internal air pressure of the bellows 504 increases. At this time, the exhaust valve 509 is opened, and the internal gas of the bellows 504 is discharged. When the bellows 504 is stretched, the internal volume of the bellows 504 increases. At this time, the intake valve 508 is opened to realize the extraction of the bellows 504. Therefore, the reciprocating expansion and contraction of the bellows 504 is used to discharge the high-temperature air inside the bellows 504, and the external normal temperature air is sucked in, so as to realize the replacement of the high-temperature air and normal temperature air inside the bellows 504, and then realize the rapid cooling of the inside of the bellows 504.

[0047] In addition, when a fire occurs inside the cabinet 1, the insulation layer outside the cable will be damaged, causing the cable conductors to contact and short-circuit, which is likely to cause damage to the external load equipment. Therefore, the following improvements are made:

[0048] A smoke sensor is provided on the top side of the cabinet 1 , and the smoke sensor is used to detect whether there is visible smoke in the cabinet 1 , so as to determine whether there is a fire inside the cabinet 1 .

[0049] Both ends of the bellows 504 are fixedly connected with air guide pipes 510, on which solenoid valves 511 are provided. The ports of the air guide pipes 510 correspond to the positions of the baffles 413, and the air guide pipes 510 on both sides are used to guide the high-pressure gas generated in the bellows 504 to the baffles 413 on both sides respectively.

[0050] When the smoke sensor detects smoke in the cabinet 1, it actively determines that a fire has occurred inside the cabinet 1. At this time, the electric telescopic part 505 is started to extend rapidly, thereby quickly compressing the bellows 504, and the air pressure in the bellows 504 increases rapidly. At the same time, the solenoid valve 511 on the air guide pipe 510 is opened, and the high-pressure gas in the bellows 504 is discharged to the baffle 413 through the air guide pipe 510. After the baffle 413 is pushed by the high-pressure gas, it moves to the side away from the bellows 504, and the guide rod 409 is stretched and drives the mounting seat 410 and the wedge block 4 11 moves to the side away from the arc-shaped tooth seat 407, at which time the buffer spring 412 is stretched, the wedge block 411 is separated from the arc-shaped tooth seat 407, and the limit spring 406 in the energy storage state is quickly released and extended. At the same time, the telescopic rod 404 is extended, and the movable arm 403 rotates to the side away from the bellows 504, so that the fixed seat 201 and the movable seat 301 are quickly separated, and the plug-in column 305 is quickly separated from the docking groove 204, so that when a fire occurs in the cabinet 1, the cabinet 1 and the external power supply are quickly disconnected, thereby protecting the external load equipment and the electrical components in the cabinet 1.

[0051] It should be noted that when the power of the cabinet 1 needs to be manually turned off when the cabinet 1 is in normal working condition, the mounting seat 410 is pulled away from the bellows 504 to disengage the wedge block 411 from the arc-shaped tooth seat 407, so that the fixed seat 201 and the movable seat 301 can be quickly separated to cut off the power.

[0052] In addition, after long-term use, oxidation corrosion may occur on the plug-in post 305, resulting in poor contact between the plug-in post 305 and the docking slot 204, affecting the normal operation of the external load device. In order to solve the above problem, the circumference of the plug-in post 305 needs to be cleaned regularly.

[0053] When cleaning, first disconnect the power supply cable connected to the plug post 305 to separate the fixed seat 201 and the movable seat 301. Figure 5 In the state shown, the electric telescopic part 505 is started to reciprocate and drive the sealing seat 501 to reciprocate, and the sealing seat 501 drives the sealing ring 503 to reciprocate, and the farthest distance the sealing ring 503 moves just reaches the end of the plug-in column 305. During the reciprocating movement of the sealing ring 503, the oxide layer and corrosion layer on the surface of the plug-in column 305 can be scraped off and cleaned, ensuring a good contact state between the plug-in column 305 and the docking groove 204 to prevent poor contact.

[0054] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A power distribution switch assembly, comprising a conductive unit (2) and a plug-in unit (3), characterized in that: The conductive unit (2) and the plug-in unit (3) are arranged correspondingly, and the limiting units (4) are symmetrically arranged on both sides between the conductive unit (2) and the plug-in unit (3), and a sealing unit (5) is arranged between the conductive unit (2) and the plug-in unit (3); The conductive unit (2) comprises a fixing seat (201), the end of the fixing seat (201) is evenly penetrated with guide holes (202), a terminal post (203) is fixedly arranged in the guide hole (202), and a docking groove (204) is arranged at one end of the terminal post (203); The plug-in unit (3) comprises a movable seat (301), a guide cylinder (302) is evenly penetrated through the side surface of the movable seat (301), a conductive column (303) is provided at the end of the guide cylinder (302), and a plug-in column (305) is provided at one end of the conductive column (303) close to the guide hole (202); The limiting unit (4) comprises two correspondingly arranged side seats (401), a U-shaped seat (402) is provided on the side of the side seat (401), the end of the U-shaped seat (402) is rotatably connected to a movable arm (403), a telescopic rod (404) is provided at the end of the movable arm (403), and a locking mechanism for limiting the movable arm (403) is provided on the U-shaped seat (402); The sealing unit (5) comprises a sealing seat (501) and an electric telescopic portion (505); the sealing seat (501) is sleeved on the outside of each conductive column (303) via a matching hole (502) opened on the side; a bellows (504) is provided between the ends of the sealing seat (501) and the fixed seat (201); both sides of the ends of the bellows (504) are fixedly connected to an air guide tube (510); and an electromagnetic valve (511) is provided on the air guide tube (510).

2. The power distribution switch assembly according to claim 1, characterized in that: The fixed seat (201) and the movable seat (301) are both made of insulating material. The movable seat (301) is arranged corresponding to the fixed seat (201). The guide cylinder (302) corresponds to the position of the guide hole (202). A wiring groove (304) is provided at one end of the conductive column (303) close to the movable seat (301). A fixing stud is threadedly connected to the wiring groove (304). A handle (306) is provided on the circumferential surface of the movable seat (301) through a support seat.

3. The power distribution switch assembly according to claim 1, characterized in that: The two side seats (401) are symmetrically arranged on both sides of the fixed seat (201); The end of the telescopic rod (404) is movably connected to the side of the movable seat (301) via a hinge seat (405), and the outside of the telescopic rod (404) is sleeved with a limit spring (406).

4. The power distribution switch assembly according to claim 1, characterized in that: The locking mechanism comprises an arc-shaped tooth seat (407) and a support plate (408); a guide rod (409) movably penetrates the side of the support plate (408); a mounting seat (410) is provided at an external end of the guide rod (409); a wedge block (411) is provided at the end of the mounting seat (410); a baffle (413) is provided at an internal end of the guide rod (409); and a port of the air guide pipe (510) corresponds to the position of the baffle (413).

5. The power distribution switch assembly according to claim 4, characterized in that: The arc-shaped tooth seat (407) is arranged on one end of the movable arm (403) located inside the U-shaped seat (402), the support plate (408) is arranged inside the U-shaped seat (402), the end of the wedge block (411) corresponds to the tooth groove of the arc-shaped tooth seat (407), the outside of the guide rod (409) is located between the support plate (408) and the mounting seat (410) and is sleeved with a buffer spring (412), and the two ends of the buffer spring (412) are respectively fixedly connected to the mounting seat (410) and the support plate (408).

6. The power distribution switch assembly according to claim 1, characterized in that: The sealing seat (501) is made of an insulating material, and a sealing ring (503) is provided at one end of the interior of the matching hole (502) close to the fixing seat (201); An elastic sleeve (506) is provided between the ends of the sealing seat (501) and the movable seat (301), and the end of the elastic sleeve (506) is detachably connected to the sealing seat (501) via an annular seat (507).

7. The power distribution switch assembly according to claim 1, characterized in that: An air inlet valve (508) and an air exhaust valve (509) are provided at the ends of the bellows (504), a temperature sensor is provided inside the bellows (504), and one end of the bellows (504) close to the sealing seat (501) is detachably connected to the outside of the sealing seat (501); The electric telescopic part (505) is arranged on the movable seat (301), and the telescopic end of the electric telescopic part (505) is fixedly connected to the outside of the sealing seat (501).

8. A power distribution cabinet, comprising the power distribution switch assembly according to any one of claims 1 to 7, characterized in that: The power distribution cabinet comprises a cabinet body (1), the cabinet body (1) is provided with a wire outlet hole (101) and a wire inlet hole (102) on both sides, a smoke sensor is provided on the top side of the interior of the cabinet body (1), the fixing seat (201) passes through and is fixedly connected in the wire inlet hole (102), a cabinet door (103) is movably connected to the side of the cabinet body (1), and heat dissipation grooves (104) are provided on the bottom of both sides of the cabinet body (1).

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