A cable plug for an AC low-voltage distribution cabinet

Abstract

This utility model relates to the field of electrical equipment technology, and in particular to a cable plug for an AC low-voltage distribution cabinet. It includes a sealing plate with three equally spaced wire holes at the top. A sized insulating sealing gasket is adhered to the bottom of the sealing plate. A plugging mechanism is installed in the wire holes, and a heat-shrinkable sleeve containing the cable is inserted vertically through the plugging mechanism. The plugging mechanism includes an outer tube, a rubber block, a lower fireproof plate, an upper fireproof plate, and a waterproof plate. The outer tube is inserted through the wire holes. The rubber block is annular and installed in the middle of the outer tube. The lower and upper fireproof plates are respectively attached to the bottom and top of the rubber block. The waterproof plate is attached to the bottom of the lower fireproof plate. This utility model allows the plugging mechanism to be tightly fitted onto the cable harness, effectively sealing the wire holes on the sealing plate. The plugging mechanism is also less prone to loosening, thus improving the plugging effect and the safety of equipment operation.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a cable plug for an AC low-voltage distribution cabinet. Background Technology

[0002] With the continuous advancement of urban power grid transformation, a large number of distribution cabinets are being used in power lines and various distribution substations. A large number of electrical components inside the distribution cabinet need to be connected to cables, and many cables need to pass through the cabinet. For this reason, the bottom of the distribution cabinet usually has perforations for wiring. However, the perforations of the distribution cabinet can lead to problems such as air leakage, dust intrusion, small animals entering, and fire spread. In order to ensure the safe and stable operation of the distribution cabinet, the perforations need to be effectively sealed.

[0003] Currently, modular cable plugs are commonly used in practical applications. Their working principle is to fit tightly against the cable and install the plug into the perforation of the distribution cabinet to seal the perforation and achieve the purpose of centralized management of cable bundles. However, common plugs have simple structures, using simple rubber rings or sealing putty for sealing, and the connection between cables is not tight enough, so they cannot effectively prevent dust and water, resulting in limited sealing effect on cable bundles. Therefore, this application proposes a cable plug for AC low-voltage distribution cabinets. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a cable plug for AC low-voltage distribution cabinets to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a cable plug for an AC low-voltage distribution cabinet, including a sealing plate, three wire holes are equally spaced on the top of the sealing plate, an insulating sealing gasket of appropriate size is bonded to the bottom of the sealing plate, a plugging mechanism is installed in the wire holes, and a heat shrink tubing with a cable is inserted through the top and bottom of the plugging mechanism.

[0006] The sealing mechanism includes an outer tube, a rubber block, a lower fireproof plate, an upper fireproof plate, and a waterproof plate. The outer tube is inserted through the wire hole. The rubber block is ring-shaped and installed in the middle of the outer tube. The lower and upper fireproof plates are respectively attached to the bottom and top of the rubber block. The waterproof plate is attached to the bottom of the lower fireproof plate. The heat shrink tubing is inserted through the upper fireproof plate, the rubber block, the lower fireproof plate, and the waterproof plate from top to bottom.

[0007] Optionally, the upper fireproof board, lower fireproof board, and waterproof board are all divided into symmetrical left and right parts. Two positioning rods are fixedly installed on the top of each part of the waterproof board. The four positioning rods pass through the lower fireproof board, the rubber block, and the upper fireproof board from bottom to top. A nut that abuts against the top of the upper fireproof board is threaded onto the top of each of the four positioning rods. An axially penetrating slit is opened on the circumferential side wall of the rubber block.

[0008] Optionally, the outer tube includes a left tube body and a right tube body. Two connecting grooves are opened at the middle position of both ends of the right tube body. Two connecting blocks that can be inserted into the connecting grooves are fixedly installed at the middle position of both ends of the left tube body. Threaded grooves that penetrate the connecting grooves are opened at the top of both ends of the right tube body. Through holes are opened on both connecting blocks. Third bolts that penetrate the corresponding connecting blocks are threaded into both threaded grooves.

[0009] Optionally, two limiting rings are fixedly installed on the inner walls of both the left and right tubes. The corners at the top and bottom of the sidewall of the rubber block are rounded. The two limiting rings on the inner walls of the left and right tubes are respectively fitted and sleeved on the top and bottom of the sidewall of the rubber block.

[0010] Optionally, a bottom ring is threaded onto the bottom end of the outer tube. The side wall of the bottom ring has an opening wider than the diameter of the heat shrink tubing. The outer side of the inner ring wall of the bottom ring is threaded to the inner wall of the outer tube, and the inner side of the outer ring wall of the bottom ring is tightly fitted to the outer wall of the outer tube. Multiple protrusions are evenly arranged on the outer side of the outer ring wall of the bottom ring. When the bottom ring is threaded to the bottom of the outer tube and cannot be rotated, the top of the inner ring wall of the bottom ring rests against the bottom of the waterproof membrane.

[0011] Optionally, a semi-circular outer ring is fixedly installed on the top of the outer side of both the left and right tube bodies. A first bolt that is threaded to the top of the sealing plate is inserted through both outer rings. A second bolt that is threaded to the top of the sealing plate is inserted through the four corners of the top of the sealing plate.

[0012] The beneficial effects of this utility model are:

[0013] When using this structure, firstly, the heat shrink tubing needs to be fitted onto multiple cables. Then, the wrapped cables are inserted into the rubber block through the gaps on its side. Next, the left and right tubes are joined together to form an outer tube. The closed outer tube is then fitted onto the outside of the rubber block, allowing the rubber block to fit tightly against the heat shrink tubing. The upper and lower fireproof plates are then placed on top of the rubber block and fitted onto the heat shrink tubing. The waterproof plate is then joined together and fitted onto the heat shrink tubing. At this point, the waterproof plate is moved upwards so that the four positioning rods pass through the lower fireproof plate, the rubber block, and the upper fireproof plate in sequence. Finally, nuts are screwed onto the positioning rods. The waterproof and fireproof plates provide waterproofing and fire resistance, further improving the sealing effect. The bottom ring at the bottom of the outer tube not only reinforces the bottom of the outer tube but also supports the waterproof plate. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the sealing mechanism of this utility model;

[0017] Figure 3 This is an exploded view of the sealing mechanism of this utility model;

[0018] Figure 4 This is a schematic cross-sectional view of the connection between the outer tube and the rubber block in this utility model.

[0019] Figure 5 This is a schematic diagram of the structure of the rubber block, waterproof membrane, and waterproof membrane connection of this utility model;

[0020] Figure 6 This is an exploded view of the outer tube of this utility model;

[0021] Figure 7 This is a schematic diagram of the connection between the outer tube and the bottom ring of this utility model;

[0022] In the diagram: 1. Sealing plate; 2. Wire hole; 3. Insulating sealing gasket; 41. Outer tube; 42. Rubber block; 43. Lower fireproof plate; 44. Upper fireproof plate; 45. Waterproof plate; 46. Positioning rod; 47. Nut; 48. Bottom ring; 49. Outer ring; 491. First bolt; 5. Heat shrink tubing; 6. Second bolt; 411. Left tube body; 412. Right tube body; 413. Connecting groove; 414. Connecting block; 415. Threaded groove; 416. Third bolt; 417. Limiting ring. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] Please see Figures 1-7 This utility model provides a technical solution: a cable plug for an AC low-voltage distribution cabinet, including a sealing plate 1, three wire holes 2 are equally spaced on the top of the sealing plate 1, an insulating sealing gasket 3 of appropriate size is bonded to the bottom of the sealing plate 1, a plugging mechanism is installed in the wire holes 2, and a heat shrink tubing 5 with a cable is inserted through the top and bottom of the plugging mechanism.

[0025] The sealing mechanism includes an outer tube 41, a rubber block 42, a lower fireproof plate 43, an upper fireproof plate 44, and a waterproof plate 45. The outer tube 41 is inserted through the wire hole 2. The rubber block 42 is ring-shaped and installed in the middle of the outer tube 41. The lower fireproof plate 43 and the upper fireproof plate 44 are respectively attached to the bottom and top of the rubber block 42. The waterproof plate 45 is attached to the bottom of the lower fireproof plate 43. The heat shrink tubing 5 is inserted through the upper fireproof plate 44, the rubber block 42, the lower fireproof plate 43, and the waterproof plate 45 from top to bottom. By installing the sealing plate 1, the hole at the bottom of the distribution cabinet used for wire pulling can be completely sealed. Then, the sealing mechanism is sleeved on the heat shrink tubing 5 wrapped with the cable and installed into the wire hole 2 on the sealing plate 1, thereby completing the sealing of the wire hole 2.

[0026] like Figure 3 and Figure 5 As shown, the upper fireproof board 44, lower fireproof board 43, and waterproof board 45 are all divided into symmetrical left and right parts. Two positioning rods 46 are fixedly installed on the top of each part of the waterproof board 45. The four positioning rods 46 pass through the lower fireproof board 43, rubber block 42, and upper fireproof board 44 sequentially from bottom to top. A nut 47 is threaded onto the top of each of the four positioning rods 46 to abut against the top of the upper fireproof board 44. An axially penetrating slit is opened on the circumferential sidewall of the rubber block 42. The upper fireproof board 44, lower fireproof board 43, and waterproof board 45 can all be separated. When installing this three-layer structure, the waterproof board 45 is first closed and joined together, and then the lower fireproof board 43 is joined together and fitted onto the positioning rods 46 on top of the waterproof board 45. On the positioning rod 46, the lower fireproof plate 43 and the waterproof plate 45 are stacked alternately. Then, the positioning rod 46 is inserted through the rubber block 42. Finally, the upper fireproof plate 44, which is joined together, is placed on the positioning rod 46 and fixed with the nut 47. The positioning rod 46 can stack the upper fireproof plate 44, the lower fireproof plate 43, the rubber block 42 and the waterproof plate 45 in an orderly manner. By strengthening the tightness between the structures, the stability of the connection can be improved, thereby improving the strong sealing effect on the wire hole 2 on the sealing plate 1.

[0027] like Figure 2 and Figure 7 As shown, the outer tube 41 includes a left tube body 411 and a right tube body 412. Two connecting grooves 413 are opened at the middle positions of both ends of the right tube body 412. Two connecting blocks 414 that can be inserted into the connecting grooves 413 are fixedly installed at the middle positions of both ends of the left tube body 411. Threaded grooves 415 that penetrate the connecting grooves 413 are opened at the top of both ends of the right tube body 412. Through holes are opened on both connecting blocks 414. Third bolts 416 that penetrate the corresponding connecting blocks 414 are threaded into both threaded grooves 415. By inserting the connecting blocks 414 and the connecting grooves 413, and then using the third bolts 416 to penetrate into the threaded grooves 415, the left tube body 411 and the right tube body 412 can be closed and connected together, so that they are sleeved on the outside of the rubber block 42. Under the action of the outer tube 41, the gaps of the rubber block 42 cannot be opened due to compression, so that the heat shrink tubing 5 can be stably clamped inside.

[0028] like Figure 3 and Figure 4 As shown, two limiting rings 417 are fixedly installed on the inner walls of both the left tube 411 and the right tube 412. The corners at the top and bottom of the side wall of the rubber block 42 are both set in an arc shape. The two limiting rings 417 on the inner walls of the left tube 411 and the right tube 412 are respectively fitted and sleeved on the top and bottom of the side wall of the rubber block 42. Through the limiting rings 417 on the inner walls of the left tube 411 and the right tube 412, the rubber block 42 can be clamped and its position can be constrained, so that the rubber block 42 cannot move up and down between the outer tubes 41.

[0029] like Figure 2 , Figure 3 and Figure 7 As shown, a bottom ring 48 is threaded onto the bottom end of the outer tube 41. The side wall of the bottom ring 48 has an opening wider than the diameter of the heat shrink tubing 5. The outer side of the inner ring wall of the bottom ring 48 is threaded to the inner wall of the outer tube 41, and the inner side of the outer ring wall of the bottom ring 48 is tightly fitted to the outer wall of the outer tube 41. Multiple protrusions are evenly arranged on the outer side of the outer ring wall of the bottom ring 48. When the bottom ring 48 is threaded to the bottom of the outer tube 41 and cannot be rotated, the top of the inner ring wall of the bottom ring 48 rests against the bottom of the waterproof plate 45. An opening is made on the side of the bottom ring 48 to facilitate its placement on the heat shrink tubing 5. Then, by twisting the bottom ring 48, it can be fitted onto the bottom end of the outer tube 41. Through the constraint of the outer ring wall and the inner ring wall of the bottom ring 48, not only can the stability of the bottom end connection of the outer tube 41 be strengthened, but it can also exert a squeezing effect on the waterproof plate 45 and the lower fireproof plate 43, so that the two are tightly fitted to the bottom of the rubber block 42.

[0030] like Figure 1 and Figure 2As shown, semi-circular outer rings 49 are fixedly installed on the top of the outer sides of the left tube 411 and the right tube 412. First bolts 491, which are threaded to the top of the sealing plate 1, are inserted through the two outer rings 49. Second bolts 6, which are threaded to the top of the sealing plate 1, are inserted through the four corners of the top of the sealing plate 1. The entire sealing mechanism can be fixed in the wire hole 2 on the sealing plate 1 through the first bolts 491 on the outer rings 49.

[0031] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cable stop for an alternating current low voltage switchboard comprising a sealing plate (1), characterized in that, The top of the sealing plate (1) is provided with three wire holes (2) at equal intervals. An insulating sealing gasket (3) of suitable size is glued to the bottom of the sealing plate (1). A sealing mechanism is installed in the wire hole (2). A heat shrink tubing (5) with a cable is inserted through the sealing mechanism from top to bottom. The sealing mechanism includes an outer tube (41), a rubber block (42), a lower fireproof plate (43), an upper fireproof plate (44), and a waterproof plate (45). The outer tube (41) is inserted through the wire hole (2). The rubber block (42) is set in a ring shape and is installed in the middle of the outer tube (41). The lower fireproof plate (43) and the upper fireproof plate (44) are respectively attached to the bottom and top of the rubber block (42). The waterproof plate (45) is attached to the bottom of the lower fireproof plate (43). The heat shrink tubing (5) is inserted through the upper fireproof plate (44), the rubber block (42), the lower fireproof plate (43), and the waterproof plate (45) from top to bottom.

2. The cable plug for an AC low-voltage distribution cabinet according to claim 1, characterized in that, The upper fireproof board (44), lower fireproof board (43) and waterproof board (45) are all divided into two symmetrical left and right parts. Two positioning rods (46) are fixedly installed on the top of each part of the waterproof board (45). The four positioning rods (46) pass through the lower fireproof board (43), rubber block (42) and upper fireproof board (44) from bottom to top. The top of each of the four positioning rods (46) is threaded with a nut (47) that abuts against the top of the upper fireproof board (44). The circumferential sidewall of the rubber block (42) is provided with an axially penetrating gap.

3. An AC low voltage switchgear cable seal according to claim 1, characterised in that, The outer tube (41) includes a left tube body (411) and a right tube body (412). Two connecting grooves (413) are opened at the middle positions of both ends of the right tube body (412). Two connecting blocks (414) that can be inserted into the connecting grooves (413) are fixedly installed at the middle positions of both ends of the left tube body (411). Threaded grooves (415) that penetrate the connecting grooves (413) are opened at the top of both ends of the right tube body (412). Through holes are opened on the two connecting blocks (414). Third bolts (416) that penetrate the corresponding connecting blocks (414) are threaded into the two threaded grooves (415).

4. An AC low voltage switchgear cable seal according to claim 3, characterised in that, Two limiting rings (417) are fixedly installed on the inner walls of the left tube (411) and the right tube (412). The corners at the top and bottom of the side wall of the rubber block (42) are set in an arc shape. The two limiting rings (417) on the inner walls of the left tube (411) and the right tube (412) are respectively fitted and sleeved on the top and bottom of the side wall of the rubber block (42).

5. An AC low voltage switchgear cable seal according to claim 1, wherein, The bottom end of the outer tube (41) is threaded with a bottom ring (48). The side wall of the bottom ring (48) has an opening wider than the diameter of the heat shrink tubing (5). The outer side of the inner ring wall of the bottom ring (48) is threaded to the inner wall of the outer tube (41), and the inner side of the outer ring wall of the bottom ring (48) is tightly fitted to the outer wall of the outer tube (41). Multiple protrusions are evenly arranged on the outer side of the outer ring wall of the bottom ring (48). When the bottom ring (48) is threaded to the bottom of the outer tube (41) and cannot rotate, the top of the inner ring wall of the bottom ring (48) abuts against the bottom of the waterproof plate (45).

6. An AC low voltage switchgear cable seal according to claim 3, characterised in that, The top of the left tube (411) and the right tube (412) are both fixedly installed with semi-circular outer rings (49). A first bolt (491) threaded to the top of the sealing plate (1) is inserted through the two outer rings (49). A second bolt (6) threaded to the top of the sealing plate (1) is inserted through the four corners of the top of the sealing plate (1).

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