Bus duct jack box

Abstract

The utility model relates to the technical field of jack boxes, in particular to a bus duct jack box, which comprises a jack box, the bottom of the jack box is fixedly connected with a gas box, the top of the gas box is provided with a threaded hole, the bottom of the gas box is provided with a wire hole corresponding to the threaded hole, and the interior of the threaded hole is in threaded connection with a wire pipe. And the top end of the line pipe is fixedly connected with a limiting ring, a rubber pipe is inserted into the line pipe, and the top end of the rubber pipe is fixedly connected with a first positioning ring. The sealing device has the advantages that during assembly, the rubber pipe penetrates into the top ring, one end, fixed with the first positioning ring, of the rubber pipe is inserted into the line pipe, the top ring is rotated, so that the first positioning ring is clamped and fixed by the top ring and the limiting ring, then the line pipe is in threaded connection with the interior of the threaded hole, the bottom of the line pipe downwards presses the second positioning ring above the line hole, and a sealing effect is achieved; therefore, the purpose of assembling is achieved, the structure is reasonable, assembling during production is facilitated, and the rubber pipe aged in the later period is also easy to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of plug-in boxes, in particular to a bus duct plug-in box. Background Art

[0002] Plug-in boxes are usually used to take power from the bus duct body and are commonly used in factories or high-rise buildings. With the development of power transmission and distribution, users have higher and higher requirements on the performance and operation of bus duct plug-in boxes. The outer shell of the plug-in box will have holes to lead the wires into the box. After the wires are introduced into the box, the holes need to be sealed to prevent external dust and water vapor from entering the plug-in box and damaging its internal electrical components.

[0003] A high-stability busbar duct plug-in box is disclosed in Chinese patent CN220358782U. The high-stability busbar duct plug-in box is pushed inside the air pipe by a telescopic rod carrying a piston. The air inside the air pipe enters the U-shaped shell through the air hole and enters the cavity. The increase of air inside the cavity pushes the annular I-shaped rubber sheet to expand, and its inner ring squeezes and hugs the surface of the wire to achieve sealing of the wire surface, avoiding the problem that the traditional plug-in box usually uses a hole in the shell to introduce the wire into the box, and the plug-in box has poor sealing due to the hole, and external dust or water vapor easily enters the plug-in box to damage its internal electrical components. However, while solving the problem, the high-stability busbar duct plug-in box has the following defects:

[0004] 1. During production, the annular I-shaped rubber sheet needs to be fixed inside the wire tube, but the wire tube is an integral structure, so it is inconvenient to fix the annular I-shaped rubber sheet. The structural design is unreasonable, which brings certain inconveniences to production and assembly.

[0005] 2. The annular I-shaped rubber sheet will age during long-term use, and the wire will heat up during the power-on process, which will accelerate the aging of the annular I-shaped rubber sheet. After the annular I-shaped rubber sheet ages, there is a possibility of air leakage. If one of the annular I-shaped rubber sheets ages, all the annular I-shaped rubber sheets will lose their sealing effect. Moreover, the annular I-shaped rubber sheet is not easy to replace after aging, thus affecting the use of the plug-in box. Utility Model Content

[0006] The purpose of the utility model is to solve at least one of the technical defects described in the background technology.

[0007] To this end, one purpose of the utility model is to propose a bus duct plug-in box, aiming to solve the problem that the sealing structure of the high-stability bus duct plug-in box in the prior art is complex, the annular I-shaped rubber sheet is difficult to replace due to aging, and this affects the use of the plug-in box.

[0008] In order to achieve the above-mentioned purpose, an embodiment of one aspect of the utility model provides a bus duct plug-in box, including a plug-in box, the bottom of the plug-in box is fixedly connected to an air box, the top of the air box is provided with a threaded hole, and a wire hole is provided at a position corresponding to the threaded hole at the bottom of the air box, the internal thread of the threaded hole is connected to a wire pipe, the top of the wire pipe is fixedly connected to a limiting ring, a rubber tube is inserted into the inside of the wire pipe, the top of the rubber tube is fixedly connected to a first positioning ring, the bottom of the rubber tube is fixedly connected to a second positioning ring, the inside of the wire pipe is provided with threads, the wire pipe is threadedly connected to a top ring through the threads provided inside the wire pipe, the bottom of the top ring is fixedly connected to a long rod, the outer surface of the wire pipe is provided with an air inlet hole, and one side of the air box is provided with an air nozzle.

[0009] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0010] 1. During assembly, insert the rubber tube into the top ring, insert the end of the rubber tube fixed with the first positioning ring into the wire tube, and rotate the top ring so that the top ring and the limit ring clamp and fix the first positioning ring, and then thread the wire tube into the threaded hole. The bottom of the wire tube presses the second positioning ring down above the wire hole to play a sealing role, thereby achieving the purpose of assembly. The structure is reasonable and convenient for assembly during production.

[0011] 2. When the rubber tube is aged, remove it by rotating the wire tube, then pry open the second positioning ring, rotate the top ring with a long rod, remove the top ring, take out the rubber tube, and then replace it with a new one in reverse, so as to achieve the purpose of easy replacement of the rubber tube and facilitate the normal use of the junction box in the later stage.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0014] Figure 1 It is a schematic diagram of the structure according to the utility model;

[0015] Figure 2 It is a schematic diagram of the structure inside the plug-in box according to the utility model;

[0016] Figure 3 It is a schematic cross-sectional structure diagram of an air box according to the utility model;

[0017] Figure 4 The figure is a schematic cross-sectional view of the wire tube, rubber tube and top ring according to the utility model.

[0018] Among them: 1. Plug-in box, 11. Support plate, 12. Air switch, 13. Box door, 14. Fixed plate, 15. Handle, 2. Air box, 21. Threaded hole, 22. Wire hole, 3. Wire tube, 31. Limiting ring, 32. Thread, 33. Air inlet, 4. Rubber tube, 41. First positioning ring, 42. Second positioning ring, 5. Top ring, 51. Long rod, 6. Air nozzle. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 1-4As shown, a bus duct plug-in box of the present embodiment comprises a plug-in box 1, an air box 2 is fixedly connected to the bottom of the plug-in box 1, a threaded hole 21 is provided on the top of the air box 2, a wire hole 22 is provided at the position corresponding to the threaded hole 21 on the bottom of the air box 2, the diameter of the threaded hole 21 is larger than the diameter of the wire hole 22, a wire tube 3 is connected to the inner thread of the threaded hole 21 to facilitate the disassembly and assembly of the wire tube 3, a limiting ring 31 is fixedly connected to the top of the wire tube 3, the inner diameter of the limiting ring 31 is smaller than the inner diameter of the wire tube 3, a rubber tube 4 is inserted into the inside of the wire tube 3, the inner diameter of the rubber tube 4 is equal to the inner diameter of the limiting ring 31, the diameter of the wire hole 22 is equal to the inner diameter of the rubber tube 4, a first positioning ring 41 is fixedly connected to the top of the rubber tube 4, the outer diameter of the first positioning ring 41 is equal to the inner diameter of the wire tube 3, and a second positioning ring 42 is fixedly connected to the bottom end of the rubber tube 4, the outer diameter of the second positioning ring 42 is greater than or equal to the inner diameter of the wire tube 3. The outer diameter of the tube 3, the bottom end of the wire tube 3 contacts the top of the second positioning ring 42, the inside of the wire tube 3 is provided with a thread 32, the wire tube 3 is threadedly connected to the top ring 5 through the thread 32 arranged inside it, the inner diameter of the top ring 5 is greater than or equal to the outer diameter of the rubber tube 4, the top ring 5 is sleeved on the outer surface of the rubber tube 4, and the bottom of the top ring 5 is fixedly connected with a long rod 51, the length of the long rod 51 is less than the length of the rubber tube 4, so as to prevent the long rod 51 from affecting the pressure of the wire tube 3 on the second positioning ring 42, an air inlet hole 33 is opened on the outer surface of the wire tube 3, and an air nozzle 6 is provided on one side of the air box 2. The air nozzle 6 adopts the structure of a car tire inflation port, and a corresponding valve structure is arranged inside. When the air pump or air pump is connected, the air can be restarted into the air box 2 through the air nozzle 6. When the air pump or air pump is removed, the gas in the air box 2 will not leak outward. Only by pressing the valve structure in the air nozzle 6 can the purpose of deflation be achieved.

[0022] Specifically, a support plate 11 is fixedly installed on the inner wall of the plug-in box 1, and a switch 12 is fixedly installed on the front side of the support plate 11. The switch 12 is suspended so that wiring can be routed under the support plate 11, which can reduce the length of the plug-in box 1 to a certain extent. A box door 13 is movably installed on the front side of the plug-in box 1.

[0023] Specifically, the top and bottom of the plug-in box 1 are fixedly connected with fixing plates 14 for fixing the plug-in box 1 on the bus duct, and the top of the plug-in box 1 is fixedly connected with a handle 15 .

[0024] The working principle of the utility model is as follows: when in use, the wire harness is inserted from the wire hole 22, the wire harness passes through the rubber tube in the wire tube 3 to the inside of the plug-in box 1, and after being connected to the air switch 12, the air pump or air pump is connected to the air nozzle 6, and gas is filled into the air box 2. The gas enters between the wire tube 3 and the rubber tube 4 through the air inlet hole 33, and the air pressure in the air box 2 increases, thereby lifting the rubber tube 4, making its inner diameter smaller, so that the cable in the rubber tube 4 can be wrapped to achieve the purpose of sealing. When the rubber tube 4 ages and leaks in the later stage, it can be disassembled by rotating the wire tube 3. Then, pry open the second positioning ring 42, rotate the top ring 5 by the long rod 51, and after disassembling the top ring 5, the rubber tube 4 can be taken out, and then the new rubber tube 4 is inserted into the top ring 5, and the end of the rubber tube 4 fixed with the first positioning ring 41 is inserted into the wire tube 3, and the top ring 5 is rotated so that the top ring 5 and the limit ring 31 clamp and fix the first positioning ring 41, and then the wire tube 3 is threadedly connected in the threaded hole 21, and the bottom of the wire tube 3 presses the second positioning ring 42 down above the wire hole 22 to play a sealing role, thereby achieving the purpose of replacing the rubber tube 4.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. During assembly, the rubber tube 4 is passed through the top ring 5, and one end of the rubber tube 4 fixed with the first positioning ring 41 is inserted into the wire tube 3, and the top ring 5 is rotated so that the top ring 5 and the limit ring 31 clamp and fix the first positioning ring 41, and then the wire tube 3 is threadedly connected in the threaded hole 21, and the bottom of the wire tube 3 presses the second positioning ring 42 down above the wire hole 22 to play a sealing role, thereby achieving the purpose of assembly, with a reasonable structure and convenient assembly during production.

[0027] 2. When the rubber tube 4 is aged, it can be disassembled by rotating the wire tube 3, and then the second positioning ring 42 is pried open, and the top ring 5 is rotated by the long rod 51. After the top ring 5 is disassembled, the rubber tube 4 can be taken out, and then the new rubber tube 4 can be replaced in reverse, so as to achieve the purpose of easy replacement of the rubber tube 4 and facilitate the normal use of the plug-in box in the later stage.

Claims

1. A bus duct plug-in box, characterized in that: The invention comprises a plug-in box (1), wherein the bottom of the plug-in box (1) is fixedly connected to an air box (2), the top of the air box (2) is provided with a threaded hole (21), a wire hole (22) is provided at a position corresponding to the threaded hole (21) at the bottom of the air box (2), a wire tube (3) is threadedly connected to the inside of the threaded hole (21), a limit ring (31) is fixedly connected to the top of the wire tube (3), a rubber tube (4) is inserted into the inside of the wire tube (3), and the rubber tube (4) is A first positioning ring (41) is fixedly connected to the top end, a second positioning ring (42) is fixedly connected to the bottom end of the rubber tube (4), a thread (32) is provided inside the wire tube (3), the wire tube (3) is threadedly connected to a top ring (5) via the thread (32) provided inside the wire tube (3), a long rod (51) is fixedly connected to the bottom of the top ring (5), an air inlet hole (33) is provided on the outer surface of the wire tube (3), and an air nozzle (6) is provided on one side of the air box (2).

2. The bus duct plug-in box according to claim 1, characterized in that: The inner diameter of the rubber tube (4) is equal to the inner diameter of the limiting ring (31), and the outer diameter of the first positioning ring (41) is equal to the inner diameter of the wire tube (3).

3. The bus duct plug-in box according to claim 2, characterized in that: The inner diameter of the top ring (5) is greater than or equal to the outer diameter of the rubber tube (4), and the length of the long rod (51) is less than the length of the rubber tube (4).

4. The bus duct plug-in box according to claim 3, characterized in that: The outer diameter of the second positioning ring (42) is greater than or equal to the outer diameter of the wire tube (3), and the diameter of the wire hole (22) is equal to the inner diameter of the rubber tube (4).

5. The bus duct plug-in box according to claim 1, characterized in that: A support plate (11) is fixedly mounted on the inner wall of the plug-in box (1), a switch (12) is fixedly mounted on the front side of the support plate (11), and a box door (13) is movably mounted on the front side of the plug-in box (1).

6. The bus duct plug-in box according to claim 1, characterized in that: The top and bottom of the plug-in box (1) are fixedly connected with a fixing plate (14), and the top of the plug-in box (1) is fixedly connected with a handle (15).

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