A sealing device for inlet and outlet lines of a power distribution cabinet

Abstract

The present invention discloses an inlet and outlet sealing device for a power distribution cabinet, belonging to the technical field of power distribution cabinets. The inlet and outlet sealing device for a power distribution cabinet comprises a power distribution cabinet body, wherein an electrical appliance mounting back plate is fixedly connected to the inner wall of the power distribution cabinet body near the back, a wiring hole is provided through the center of the surface of the electrical appliance mounting back plate, an inlet and outlet sealer is installed at the wiring hole, and the inlet and outlet sealer comprises a sealing plug column body, and a plurality of sealing wire grooves distributed in an even number are provided at the outer wall of the sealing plug column body. The present invention makes the wiring arrangement of the power distribution cabinet position more orderly through the inlet and outlet sealer, facilitates the inspection and maintenance of the line, and avoids the situation where the heat dissipation is affected by the disorder of the line. At the same time, the inlet and outlet positions of the electrical appliance mounting back plate are sealed by the sealing plug column body and the wrapping cotton, so as to avoid the accumulation of dust from the outside affecting the heat dissipation of the equipment, avoid the thermal aging of the equipment, and avoid the short circuit of the equipment caused by dust.

Description

Technical Field

[0001] The invention belongs to the technical field of power distribution cabinets, and in particular relates to an inlet and outlet sealing device for a power distribution cabinet. Background Art

[0002] A power distribution cabinet is a device used for power distribution and control, usually installed in buildings, factories or other power systems. It usually consists of one or more circuit breakers, fuses, contactors, relays, power metering equipment, etc.

[0003] In the prior art, the inlet and outlet lines of the distribution cabinet are all routed through holes at the back panel position. Drilling holes at the back panel position of the distribution cabinet for routing causes poor sealing of the distribution cabinet. When used for a long time, the electronic equipment inside the distribution cabinet may generate static electricity during operation, attracting dust particles in the surrounding environment. At the same time, the dust particles are deposited to form a large amount of dust. The dust particles have a certain water absorption capacity, which causes the humidity in the distribution cabinet to increase. At the same time, a large amount of dust is deposited in the distribution cabinet, resulting in poor heat dissipation effect of the equipment, accelerating thermal aging of the equipment, and affecting the service life of the equipment. At the same time, it may cause short circuits in the electronic components in the distribution cabinet, and it is necessary to regularly shut down the power to perform dust removal maintenance on the equipment. When the distribution cabinet is powered off for maintenance, it will cause: production interruption, economic loss, reduced production efficiency, risk of equipment damage and increased probability of data loss or system failure. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a power distribution cabinet inlet and outlet line equipment with good sealing performance.

[0005] The technical solution adopted to solve the above technical problems is: a distribution cabinet inlet and outlet line sealing device, including a distribution cabinet main body, an electrical appliance mounting back plate is fixedly connected to the inner wall of the distribution cabinet main body near the back, a wiring hole is opened through the center position of the surface of the electrical appliance mounting back plate, and an inlet and outlet line sealer is installed at the wiring hole position.

[0006] Through the above technology, electrical appliances in the distribution cabinet body can be installed through the electrical appliance installation backplane, the wiring holes pass through the wiring in the distribution cabinet body, and the inlet and outlet line sealers organize the wiring of the electrical appliances in the distribution cabinet body to avoid messy wiring. The inlet and outlet line positions are well sealed to prevent dust from entering.

[0007] The inlet and outlet wire sealer includes a sealing plug column body, and a plurality of sealing wire grooves distributed in an even number are opened on the outer wall of the sealing plug column body. Two symmetrically arranged sealing wire grooves are provided with a group of positioning slide grooves, and the lengths of the positioning slide grooves decrease arbitrarily. The sealing plug column body is provided with a winding reel at the corresponding positioning slide groove position.

[0008] Through the above technical scheme, the even-numbered distribution of sealed wire troughs can make the positioning slide grooves distributed in pairs, which is convenient for the installation of the winding reel. The lines are routed through the sealed wire troughs set at the main body of the sealing plug. The lengths of the positioning slide grooves decrease equidistantly, so that the winding reels can be arranged in sequence without interfering with each other, and longer wires can be wound around the winding reel, making the wiring more neat.

[0009] The sealed wire trough is located at one end of the electrical appliance installation back plate close to the main body of the power distribution cabinet and is fixedly connected with two symmetrically arranged wrapping cottons.

[0010] Through the above technical solution, the line is inserted into the sealed wire trough so that the wrapping cotton is wrapped around the outer wall of the line, thereby avoiding a gap between the line and the side wall of the sealed wire trough to cause poor sealing.

[0011] Furthermore, the inner wall of the wire winding drum is fixedly connected with two symmetrically arranged limiting protrusions, and the two limiting protrusions are slidably connected to the inner wall of the positioning slide groove at the corresponding positions. The wire winding drum is fixedly connected with a positioning ring at the middle position of one side of the back plate of the electrical appliance installation, and a plurality of evenly distributed wire clamping grooves are opened at the outer edge of the wire winding drum, and two symmetrically arranged locking protrusions are fixedly connected to the edge positions on both sides of the wire clamping groove.

[0012] Through the above technical scheme, the inner wall of the winding drum slides with the outer wall of the sealing plug column body, and the limiting protrusion can slide in the positioning slide groove position of the sealing plug column body to position the circumference of the winding drum on the sealing plug column body, and the positioning ring can wrap the line to shape the line. The wire clamping groove clamps the wound line in the wire clamping groove, which is convenient for leading the line out of the distribution cabinet body, and the locking protrusion can prevent the line from falling off from the wire clamping groove position. The sealed wire groove where the wire wound by the corresponding winding drum is located is consistent with the positioning slide groove and the sealed wire groove where the limiting protrusion of the winding drum is located. In this way, the limiting protrusion of the winding drum close to the back panel of the electrical appliance installation can avoid affecting the wire wound by the rear winding drum through the sealed wire groove.

[0013] Furthermore, the inner wall of the sealed wire trough is fixedly connected to two symmetrically arranged clamping rings at the opening position, the clamping rings and the locking protrusions are both made of rubber materials, and the wrapping cotton is a low-density sponge material.

[0014] Through the above technical scheme, the circuit can be clamped in the sealed wire trough by setting a clamping ring and will not fall off, and the circuit can be firmly clamped in the sealed wire trough. The clamping ring and the locking protrusion of the rubber material are relatively soft and will not affect the normal insertion of the circuit. The wrapping cotton of the low-density sponge material has high elasticity and can be fully wrapped around the outside of the circuit, so as to block the gap at the wiring hole position and have good sealing performance.

[0015] Furthermore, a mounting block is fixedly connected to the edge of the winding drum near the electrical appliance mounting back plate, the mounting block is rotatably connected to a squeezing claw via a rotating shaft and a torsion spring, and a blocking limit plate is fixedly connected to the surface of the squeezing claw.

[0016] Through the above technical scheme, the mounting block can support the installation of the extrusion claw, and the extrusion claw cooperates with the torsion spring and is always close to the center of the circle. The edge of the line after winding can be squeezed to prevent the wound line from loosening, and the blocking limit plate can press the line in the horizontal direction to prevent the line reel from collapsing and loosening in the horizontal direction.

[0017] Furthermore, a sealing ring made of rubber material is embedded and fixedly connected to the electrical appliance mounting back plate near the winding drum and outside the wiring hole, and a sealing extrusion disk is fixedly connected to the outer wall of the sealing plug body near the sealing ring, and the sealing extrusion disk is extruded by the sealing ring.

[0018] Through the above technical solution, the sealing ring of the rubber material and the sealing extrusion disk are pressed against each other, so that the sealing between the sealing extrusion disk and the electrical appliance mounting back plate is well sealed and dust will not penetrate.

[0019] Furthermore, the sealing extrusion disk is fixedly connected with a support block at a position close to a side of the electrical appliance mounting back plate, the electrical appliance mounting back plate is provided with a support groove below the sealing ring, and the support block is slidably connected to the support groove.

[0020] Through the above technical solution, when the support block is inserted into the support groove, the support block can support the sealing extrusion disk to prevent the sealing plug column body from being deformed under the gravity of the winding disk.

[0021] Furthermore, the electrical appliance mounting back plate is fixedly connected to a position above one side of the sealing extrusion disk with two symmetrically arranged tightening nuts, the sealing plug column body is provided with a cross-shaped positioning slot at the center position of one end away from the sealing extrusion disk, the sealing plug column body is provided with a pressing plate at one side of the positioning slot, the pressing plate is fixedly connected to a limiting block at the center position of one side of the positioning slot, the size and shape of the limiting block are consistent with the size and shape of the positioning slot, and the limiting block is slidably connected to the side wall of the positioning slot, and the diameter of the pressing plate is smaller than the diameter of the winding drum.

[0022] Through the above technical solution, by inserting the limit block into the positioning slot, several winding reels can be effectively tightened, and then the tightening bolt is passed through the pressing plate, and then the tightening bolt is screwed into the corresponding tightening nut to fix the pressing plate. The winding reel is positioned laterally by the pressing plate. The diameter of the pressing plate is smaller than the diameter of the winding reel to ensure that the pressing plate will not block the wire slot.

[0023] Furthermore, a tightening bolt is slidably connected through the upper position of the side wall of the pressing plate, and the tightening bolt is threadedly connected to a tightening nut at a corresponding position.

[0024] Furthermore, a sealing back plate is provided at the opening position on the back of the power distribution cabinet body, and a wire outlet hole for the incoming and outgoing wires is provided through the bottom of the sealing back plate. The sealing back plate and the power distribution cabinet body are fastened and fixed by butterfly bolts, and a control handle is fixedly connected to the middle position on the back of the sealing back plate.

[0025] Through the above technical solution, the sealing back plate seals the back of the distribution cabinet body, and the butterfly bolt makes it easy to quickly install or disassemble the sealing back plate. The loading and unloading of the sealing back plate can be controlled by the control handle. The wire outlet hole can pull out the wire head wound on the winding reel and connect it to the corresponding electrical appliance or power supply.

[0026] The beneficial effects of the present invention are as follows: (1) The present invention sets a sealing plug body, and clamps the line passing through the electrical appliance installation back plate into the sealed wire groove, and clamps the line into the corresponding wrapping cotton. The wrapping cotton is a low-density sponge with good elasticity, which can effectively wrap the line. The sealing plug body and the wrapping cotton can form a contour consistent with the size and shape of the wiring hole, so that the sealing inside the distribution cabinet body is better, and the environment inside the distribution cabinet body is maintained to avoid dust infiltration affecting the heat dissipation of the equipment or causing a short circuit in the equipment; (2) The present invention sets a winding drum, and the line passing through the electrical appliance installation back plate is wound at the winding drum position. The wound line is positioned by the blocking limit plate and the extrusion claw, so that the line can be fixed, and then the line is clamped and fixed by the wire groove, so that the line arrangement is more neat, and it is avoided that the excessively long line is piled up on the back of the electrical appliance installation back plate, causing the line inspection and maintenance to be unchanged, and the line accumulation is avoided to cause poor heat dissipation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of a sealing device for inlet and outlet lines of a power distribution cabinet from a first perspective of the present invention;

[0028] Figure 2 This is a structural diagram of a power distribution cabinet inlet and outlet sealing device from a second viewing angle of the present invention;

[0029] Figure 3 It is a schematic diagram of the internal structure of the back side of a sealing device for incoming and outgoing wires of a power distribution cabinet according to the present invention;

[0030] Figure 4 It is an assembly diagram of an inlet and outlet line sealer of an inlet and outlet line sealing device of a power distribution cabinet of the present invention;

[0031] Figure 5 yes Figure 4 The enlarged view of point A in the middle;

[0032] Figure 6 It is a three-dimensional structural diagram of a sealing plug of an inlet and outlet sealing device of a power distribution cabinet according to the present invention;

[0033] Figure 7 The invention discloses an exploded structural diagram of an inlet and outlet line sealer of an inlet and outlet line sealing device of a power distribution cabinet.

[0034] : 1. Distribution cabinet body; 2. Sealing back plate; 3. Butterfly bolt; 4. Control handle; 5. Inlet and outlet line sealer; 500. Sealing plug column body; 501. Extrusion claw; 502. Sealing extrusion disk; 503. Tightening nut; 504. Tightening bolt; 505. Pressing plate; 506. Winding reel; 507. Wire clamping groove; 508. Locking protrusion; 509. Sealing ring; 510. Wiring hole; 511. Support groove; 512. Support block; 513. Limit block; 514. Limit protrusion; 515. Positioning ring; 516. Snap ring; 517. Mounting block; 518. Positioning slide groove; 519. Positioning slot; 520. Sealing wire trough; 521. Wrapping cotton; 522. Blocking limit plate; 6. Electrical appliance installation back plate. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] like Figure 1-Figure 7 As shown, a distribution cabinet inlet and outlet line sealing device of the present embodiment includes a distribution cabinet body 1, an inner wall of the distribution cabinet body 1 is fixedly connected to an electrical appliance mounting back plate 6 near the back, a wiring hole 510 is penetrated through the center of the surface of the electrical appliance mounting back plate 6, and an inlet and outlet line sealer 5 is installed at the wiring hole 510. Electrical appliances in the distribution cabinet body 1 can be installed through the electrical appliance mounting back plate 6, the wiring hole 510 penetrates the wiring in the distribution cabinet body 1, and the inlet and outlet line sealer 5 organizes the wiring of the electrical appliances in the distribution cabinet body 1 to avoid messy wiring, and the inlet and outlet line positions have good sealing properties to prevent dust from entering.

[0037] A sealing back plate 2 is provided at the opening position on the back of the power distribution cabinet body 1, and a wire outlet hole for the incoming and outgoing wires is provided through the bottom of the sealing back plate 2. The sealing back plate 2 and the power distribution cabinet body 1 are screwed and fixed by butterfly bolts 3. A control handle 4 is fixedly connected to the middle position on the back of the sealing back plate 2. The sealing back plate 2 seals the back of the power distribution cabinet body 1, and the butterfly bolts 3 make it convenient to quickly install or disassemble the sealing back plate 2, and the loading and unloading of the sealing back plate 2 can be controlled by the control handle 4. The wire outlet hole can pull out the line head wound on the winding reel 506 and connect it to the corresponding electrical appliance or power supply.

[0038] A sealing ring 509 made of rubber is embedded and fixedly connected to the electrical appliance mounting back plate 6 near the winding reel 506 and outside the wiring hole 510. A sealing extrusion disk 502 is fixedly connected to the outer wall of the sealing plug body 500 near the sealing ring 509. The sealing extrusion disk 502 is squeezed by the sealing ring 509, and the sealing ring 509 made of rubber and the sealing extrusion disk 502 are squeezed against each other, so that the sealing between the sealing extrusion disk 502 and the electrical appliance mounting back plate 6 is good and dust will not penetrate.

[0039] The sealing extrusion disk 502 is fixedly connected with a support block 512 at a position close to the electrical appliance mounting back plate 6. The electrical appliance mounting back plate 6 is provided with a support groove 511 below the sealing ring 509. The support block 512 is slidably connected to the support groove 511. When the support block 512 is inserted into the support groove 511, the support block 512 can support the sealing extrusion disk 502 to prevent the sealing plug column body 500 from being deformed under the gravity of the winding reel 506.

[0040] The inlet and outlet wire sealer 5 includes a sealing plug column body 500, and a plurality of sealing wire grooves 520 distributed in even numbers are opened on the outer wall of the sealing plug column body 500. A group of positioning grooves 518 are provided at two symmetrically arranged sealing wire grooves 520, and the lengths of the positioning grooves 518 decrease arbitrarily. A winding drum 506 is provided at the corresponding positioning grooves 518 positions of the sealing plug column body 500. The even-numbered distribution of the sealing wire grooves 520 can make the positioning grooves 518 distributed in pairs, which is convenient for installing the winding drum 506. The lines are routed through the sealing wire grooves 520 arranged at the position of the sealing plug column body 500. The lengths of the positioning grooves 518 decrease arbitrarily, so that the winding drums 506 can be arranged in sequence without interfering with each other, and the longer wires can be wound around the winding drum 506, making the wiring more neat.

[0041] The winding drum 506 is fixedly connected to a mounting block 517 at the edge of one side near the electrical appliance mounting back plate 6, and the mounting block 517 is rotatably connected to a squeezing claw 501 via a rotating shaft and a torsion spring, and a blocking limit plate 522 is fixedly connected to the surface of the squeezing claw 501. The mounting block 517 can mount and support the squeezing claw 501, and the squeezing claw 501 cooperates with the torsion spring and always moves toward the center of the circle, so as to squeeze the edge of the line after winding to prevent the wound line from becoming loose, and the blocking limit plate 522 can press the line in the horizontal direction to prevent the line drum from collapsing and becoming loose in the horizontal direction.

[0042] The inner wall of the wire winding drum 506 is fixedly connected with two symmetrically arranged limiting protrusions 514, and the two limiting protrusions 514 are slidably connected to the inner wall of the positioning slide groove 518 at the corresponding position. The wire winding drum 506 is fixedly connected with a positioning ring 515 at the middle position of one side of the electrical appliance installation back plate 6. The outer edge of the wire winding drum 506 is provided with a plurality of evenly distributed wire clamping grooves 507. The edges of the wire clamping grooves 507 on both sides are fixedly connected with two symmetrically arranged locking protrusions 508. The wire winding drum 506 is fixedly connected with the inner wall of the positioning slide groove 518 at the corresponding position. 6 The inner wall slides with the outer wall of the sealing plug column body 500, and the limiting protrusion 514 can slide in the positioning groove 518 position of the sealing plug column body 500, so as to position the winding drum 506 circumferentially on the sealing plug column body 500, and the positioning ring 515 can wind the line to shape the line, and the wire clamping groove 507 clamps the wound line in the wire clamping groove 507, so as to facilitate the line to be led out of the distribution cabinet body 1, and the locking protrusion 508 can prevent the line from falling off from the wire clamping groove 507.

[0043] The inner wall of the sealed wire trough 520 is located at the opening position and fixedly connected with two symmetrically arranged clamping rings 516. The clamping rings 516 and the locking protrusions 508 are both made of rubber materials, and the wrapping cotton 521 is made of low-density sponge material. By setting the clamping rings 516, the line can be clamped in the sealed wire trough 520 and will not fall off, and the line can be firmly clamped in the sealed wire trough 520. The clamping rings 516 and the locking protrusions 508 made of rubber material are relatively soft and will not affect the normal insertion of the line. The wrapping cotton 521 made of low-density sponge material has high elasticity and can be fully wrapped around the outside of the line to block the gap at the wiring hole 510, and has good sealing performance.

[0044] The sealed wire duct 520 is located at one end of the electrical appliance installation back plate 6 close to the distribution cabinet body 1 and is fixedly connected with two symmetrically arranged wrapping cottons 521. By inserting the line into the sealed wire duct 520, the wrapping cotton 521 is wrapped around the outer wall of the line to avoid a gap between the line and the side wall of the sealed wire duct 520, which causes poor sealing.

[0045] Two symmetrically arranged tightening nuts 503 are fixedly connected to the upper position of the electrical appliance installation back plate 6 near the sealing extrusion disk 502. A cross-shaped positioning slot 519 is opened at the center of one end of the sealing plug column body 500 away from the sealing extrusion disk 502. A pressing plate 505 is arranged on the side of the sealing plug column body 500 near the positioning slot 519. A limiting block 513 is fixedly connected to the center of the side of the pressing plate 505 near the positioning slot 519. The size and shape of the limiting block 513 are consistent with the size and shape of the positioning slot 519, and the limiting block 513 is slidably connected to the side wall of the positioning slot 519. By inserting the limiting block 513 into the positioning slot 519, a plurality of winding reels 506 can be effectively tightened, and then the tightening bolts 504 are passed through the pressing plate 505, and then the tightening bolts 504 are screwed into the corresponding tightening nuts 503, so that the pressing plate 505 can be fixed, and the winding reel 506 can be horizontally positioned by the pressing plate 505.

[0046] A tightening bolt 504 is slidably connected through the upper side wall of the pressing plate 505 , and the tightening bolt 504 is threadedly connected to a tightening nut 503 at a corresponding position.

[0047] The working principle of this embodiment is as follows: when the device is in use, the door of the power distribution cabinet main body 1 is opened, the required electrical appliances are installed on the surface of the electrical appliance installation back plate 6, and the electrical appliances are connected through wires according to the established circuit, and the sealing plug main body 500 is inserted into the wiring hole 510 of the electrical appliance installation back plate 6, so that the support block 512 is inserted into the support groove 511, and the sealing ring 509 is tightly attached to the sealing extrusion disk 502;

[0048] Insert the wire head of the wire that needs to be led out into the wrapping cotton 521, so that the wrapping cotton 521 is fully wrapped around the outer side of the wire, pull the wire so that the wire is stuck in the sealed wire groove 520 of the sealing plug column body 500, and limit it through the clamping ring 516 to prevent the wire from falling off from the sealed wire groove 520, slide the corresponding inner side of the winding drum 506 with the outer side of the sealing plug column body 500, and slide the limiting protrusion 514 with the corresponding positioning groove 518, and pull the wire head out of the corresponding sealed wire groove 520, and clamp the wire with the clamping ring 516, and wrap the excess long wire with the winding drum 506 to form a disc-shaped structure, and position it in the horizontal position through the blocking limiting plate 522, and then squeeze it. The pressing claw 501 fixes the wire in the circumferential direction under the action of the torsion spring so that the disc-shaped wire will not collapse, and the remaining wire is stuck in the wire clamping groove 507 of the winding drum 506, and the locking protrusion 508 prevents it from falling off from the wire clamping groove 507 (the sealing wire groove 520 where the wire wound on the corresponding winding drum 506 is located is consistent with the positioning groove 518 and the sealing wire groove 520 where the limiting protrusion 514 of the winding drum 506 is located, so that the limiting protrusion 514 of the winding drum 506 close to the electrical appliance installation back plate 6 can be prevented from affecting the wire wound on the rear winding drum 506 Passing through the sealed wire groove 520), and then the wire can be pulled out from the outlet hole position of the sealed back plate 2 to be electrically connected to the external electrical appliance;

[0049] Insert the unknown limit block 513 of the pressing plate 505 into the positioning slot 519 of the sealing plug column body 500, so that the pressing plate 505 is pressed against the winding disk 506 on the side away from the wrapping cotton 521, so that the winding disks 506 are squeezed against each other, and then insert the tightening bolt 504 into the pressing plate 505 and tighten it with the tightening nut 503 at the corresponding position;

[0050] The sealing back plate 2 is placed on the back of the power distribution cabinet body 1 by controlling the handle 4 , and then the butterfly bolts 3 are tightened to complete the wiring arrangement in the power distribution cabinet body 1 .

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A sealing device for inlet and outlet cables of a power distribution cabinet, comprising a power distribution cabinet body (1), characterized in that: An electrical appliance mounting back plate (6) is fixedly connected to the inner wall of the power distribution cabinet body (1) near the back, a wiring hole (510) is provided through the center of the surface of the electrical appliance mounting back plate (6), and an inlet and outlet wire sealer (5) is installed at the wiring hole (510); The inlet and outlet wire sealer (5) comprises a sealing plug column body (500), a plurality of sealing wire grooves (520) distributed in an even number are provided on the outer wall of the sealing plug column body (500), two symmetrically arranged sealing wire grooves (520) are provided with a group of positioning grooves (518), and the lengths of the positioning grooves (518) decrease arithmetically, and a wire winding drum (506) is provided at the corresponding positioning grooves (518) of the sealing plug column body (500); The sealed wire duct (520) is located on one end of the electrical appliance mounting back plate (6) close to the power distribution cabinet body (1) and is fixedly connected to two symmetrically arranged wrapping cottons (521); The inner wall of the wire winding drum (506) is fixedly connected with two symmetrically arranged limiting protrusions (514), and the two limiting protrusions (514) are slidably connected to the inner wall of the positioning slide groove (518) at the corresponding position. The wire winding drum (506) is fixedly connected with a positioning ring (515) at the middle position of one side close to the electrical appliance mounting back plate (6). The outer edge of the wire winding drum (506) is provided with a plurality of evenly distributed wire clamping grooves (507), and the edge positions on both sides of the wire clamping groove (507) are fixedly connected with two symmetrically arranged locking protrusions (508); A sealing ring (509) made of rubber material is embedded and fixedly connected to the electrical appliance mounting back plate (6) near the winding drum (506) and located outside the wiring hole (510); a sealing extrusion disk (502) is fixedly connected to the outer wall of the sealing plug body (500) near the sealing ring (509); the sealing extrusion disk (502) is pressed against the sealing ring (509).

2. A power distribution cabinet inlet and outlet sealing device according to claim 1, characterized in that: The inner wall of the sealed wire groove (520) is located at the opening position and fixedly connected to two symmetrically arranged clamping rings (516); the clamping rings (516) and the locking protrusions (508) are both made of rubber materials, and the wrapping cotton (521) is a low-density sponge material.

3. A power distribution cabinet inlet and outlet sealing device according to claim 1, characterized in that: The winding drum (506) is fixedly connected to a mounting block (517) at an edge position close to a side of the electrical appliance mounting back plate (6); the mounting block (517) is rotatably connected to a pressing claw (501) via a rotating shaft and a torsion spring; and a blocking limit plate (522) is fixedly connected to a surface position of the pressing claw (501).

4. A power distribution cabinet inlet and outlet sealing device according to claim 1, characterized in that: A support block (512) is fixedly connected to the sealing extrusion disc (502) at a position close to one side of the electrical appliance mounting back plate (6); a support groove (511) is provided on the electrical appliance mounting back plate (6) below the sealing ring (509); and the support block (512) is slidably connected to the support groove (511).

5. The sealing device for inlet and outlet lines of a power distribution cabinet according to claim 1, characterized in that: Two symmetrically arranged tightening nuts (503) are fixedly connected to the upper position of the electrical appliance mounting back plate (6) near the sealing extrusion disk (502); a cross-shaped positioning slot (519) is provided at the center of one end of the sealing plug column body (500) away from the sealing extrusion disk (502); a pressing plate (505) is provided at the side of the sealing plug column body (500) near the positioning slot (519); a limiting block (513) is fixedly connected to the center of the side of the pressing plate (505) near the positioning slot (519); the size and shape of the limiting block (513) are consistent with the size and shape of the positioning slot (519), and the limiting block (513) is slidably connected to the side wall of the positioning slot (519); the diameter of the pressing plate (505) is smaller than the diameter of the winding drum (506).

6. A sealing device for inlet and outlet lines of a power distribution cabinet according to claim 5, characterized in that: A tightening bolt (504) is slidably connected through the upper side wall of the pressing plate (505), and the tightening bolt (504) is threadedly connected to a tightening nut (503) at a corresponding position.

7. The sealing device for inlet and outlet lines of a power distribution cabinet according to claim 1, characterized in that: A sealing back plate (2) is provided at an opening on the back of the power distribution cabinet body (1), and a cable outlet hole for incoming and outgoing cables is provided through the bottom of the sealing back plate (2). The sealing back plate (2) and the power distribution cabinet body (1) are screwed and fixed by butterfly bolts (3), and a control handle (4) is fixedly connected to the middle of the back of the sealing back plate (2).

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