Cable electric leakage detection device for distribution box

Abstract

The utility model discloses a cable electric leakage detection device for a distribution box, which belongs to the technical field of electrical equipment and comprises a distribution box body, an electric leakage detection device main body used for providing electric leakage detection and alarm effects for a cable in the distribution box body and a plurality of wires electrically connected with an internal circuit of the electric leakage detection device main body. The ends, away from the electric leakage detection device body, of the wires are electrically connected with conductive plates used for conducting cable overflow current in the distribution box body, the side faces of the multiple conductive plates abut against the outer side wall of the distribution box body, and the side face of the distribution box body is provided with an extrusion assembly. An inner ring of the sealing bearing is in interference fit with the screw rod, the screw rod is in threaded connection with a connecting plate, and an L-shaped movable plate used for extruding the conductive plates is welded on the top surface of the connecting plate. The plurality of conductive plates are tightly attached to the outer side wall of the distribution box body, so that the electric leakage detection effect of the device on the cable in the distribution box is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical equipment, in particular to a cable leakage detection device for a distribution box. Background Art

[0002] During the use of the distribution box, leakage detection of the cables inside the distribution box is achieved by electrically connecting the leakage detection device to the outer wall of the distribution box through a wire. In order to facilitate the disassembly and maintenance of the leakage detection device, the existing leakage detection device is usually electrically connected to the outer wall of the distribution box in an abutting manner when in use. It is very easy for the wire to be loosely connected to the outer wall of the distribution box, thereby reducing the leakage detection effect of the leakage detection device.

[0003] A search revealed a Chinese patent document (authorization publication number CN213402107U) that discloses a leakage detection device for a distribution box, comprising a distribution box and a control mechanism. The control mechanism comprises a housing, which is located at the top of the distribution box. An alarm is fixedly mounted in the middle of the top of the housing, and a battery, a PLC controller, and a current sensor are fixedly mounted on the inner end of the housing. The beneficial effects of the present invention are as follows: the present invention provides a leakage detection device for a distribution box. By providing two adjustable fixing mechanisms, the present invention can be fixedly mounted on distribution boxes of different specifications. During installation, only the distance between the two clamping plates needs to be adjusted by turning a handwheel, resulting in a relatively simple installation process and a wide range of applications. The present invention is also provided with multiple detection mechanisms, which are attached to the outer wall of the distribution box via magnetic rings and can simultaneously perform leakage detection on multiple locations. Upon detecting leakage, the alarm can be controlled to emit an alarm sound and light to remind pedestrians to stay away from the distribution box. However, the device does not take into account the close connection between the wires and the outer wall of the distribution box, which reduces the leakage detection effect of the leakage detection device on the cables inside the distribution box. Utility Model Content

[0004] The purpose of the utility model is to provide a cable leakage detection device for a distribution box to solve the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cable leakage detection device for a distribution box, comprising a distribution box body and a leakage detection device body for providing leakage detection and alarm for the cables inside the distribution box body, and a plurality of wires electrically connected to the internal circuit of the leakage detection device body, one end of the wire away from the leakage detection device body is electrically connected to a conductive plate for conducting overflow current of the cables inside the distribution box body, the side surfaces of the plurality of conductive plates are in contact with the outer wall of the distribution box body, an extrusion assembly is provided on the side of the distribution box body, the extrusion assembly includes a screw and a sealed bearing, the outer ring of the sealed bearing is embedded and fixedly connected to the distribution box body, the inner ring of the sealed bearing is interference fit with the screw, the screw is threadedly connected to a connecting plate, and an L-shaped movable plate for extruding the conductive plate is welded to the top surface of the connecting plate.

[0006] Preferably, the inner side wall of the movable plate is slidably connected to the distribution box body, and a knob is welded to the end face of the screw rod.

[0007] Preferably, the bottom surface of the leakage detection device body is fixedly connected to the distribution box body by bolts, and a clamping assembly is provided on the top surface of the distribution box body.

[0008] Preferably, the clamping assembly includes a fixing plate for providing support for a plurality of wires and an inverted U-shaped support plate.

[0009] Preferably, the top surface and bottom surface of the fixing plate are welded to the support plate and the distribution box body respectively, and a threaded sleeve is embedded and fixedly connected to the top surface of the support plate.

[0010] Preferably, the threaded sleeve is threadedly connected to a threaded rod, and a rotating block and a limit bearing are respectively provided on the top surface and the bottom surface of the threaded rod.

[0011] Preferably, a movable plate for squeezing a plurality of wires is embedded and fixedly connected in the outer ring of the limiting bearing, and the inner side wall of the support plate is slidably connected to the movable plate.

[0012] Compared with the prior art, the technical effects and advantages of this utility model are:

[0013] The cable leakage detection device for the distribution box conducts the leakage current of the internal circuit of the distribution box through the conductive plate and the wire, and then guides the leakage current of the cable inside the distribution box into the leakage detection device body, so that the leakage detection device body issues an alarm prompt. The provided extrusion component provides an extrusion effect on the plurality of conductive plates, so that the conductive plates are in close contact with the outer wall of the distribution box. The provided sealed bearing realizes the relative rotation of the screw rod and the distribution box, so that the connecting plate moves along the thread path of the screw rod. During the transmission process, the movable plate provides an extrusion effect on the plurality of conductive plates, so that the plurality of conductive plates are in close contact with the outer wall of the distribution box, thereby preventing the conductive plates from being in loose contact with the distribution box and reducing the leakage detection effect of the leakage detection device on the cables inside the distribution box.

[0014] The cable leakage detection device for the distribution box is provided with a clamping component that provides a clamping and fixing effect on the wires electrically connected to the leakage detection device body, preventing the wires from frequently shaking and deviating, which would cause the electrical connection between the wires and the leakage detection device body to fall off, thereby improving the structural stability of the device components, rotating the rotating block, and then moving the threaded rod along the threaded path of the threaded sleeve, and providing a limit bearing to achieve relative rotation between the threaded rod and the movable plate, thereby facilitating the downward movement of the movable plate, and in cooperation with the fixed plate, clamping and fixing of the plurality of wires is achieved, preventing the wires from frequently shaking and deviating, which would cause the electrical connection between the wires and the leakage detection device body to fall off, thereby improving the leakage detection effect of the leakage detection device on the cables inside the distribution box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a schematic structural diagram of the clamping assembly of the present utility model;

[0018] Figure 3 For the utility model Figure 2 A magnified view of the structure at center A;

[0019] Figure 4 This is a schematic structural diagram of the extrusion assembly of the present utility model.

[0020] Description of reference numerals:

[0021] In the figure: 1. Distribution box; 2. Leakage detection device body; 3. Wire; 4. Conductive plate; 5. Clamping assembly; 6. Fixed plate; 7. Support plate; 8. Threaded sleeve; 9. Threaded rod; 10. Rotating block; 11. Limit bearing; 12. Moving plate; 13. Extrusion assembly; 14. Movable plate; 15. Connecting plate; 16. Screw; 17. Sealed bearing; 18. Knob; 19. Box door. DETAILED DESCRIPTION

[0022] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present invention.

[0023] Unless otherwise defined, the directions of up, down, left, right, front, back, inside and outside involved in this document are based on the directions of up, down, left, right, front, back, inside and outside shown in the figures of the present invention, and are explained here together.

[0024] The connection method can be bonding, welding, bolt connection, etc., which shall be based on actual needs.

[0025] In order to solve the problem that when the cable leakage detection device for distribution box is in use, the wire is not tightly connected to the outer wall of the distribution box, which reduces the leakage detection effect of the leakage detection device on the cables inside the distribution box, please refer to Figures 1 to 4 The structure of the device body is composed of a distribution box body 1 and a leakage detection device body 2 for providing leakage detection and alarm for the cables inside the distribution box body 1, and several wires 3 electrically connected to the internal circuit of the leakage detection device body 2. The inner wall of the leakage detection device body 2 is provided with a PLC controller, a buzzer, and an alarm light for providing an alarm prompt for the current leaked from the distribution box body 1. The end of the wire 3 away from the leakage detection device body 2 is electrically connected to a conductive plate 4 for conducting the overflow current of the cables inside the distribution box body 1. The conductive plate 4 is in contact with the outer wall of the distribution box body 1 through the provided conductive plate 4. When leakage occurs in the cables inside the distribution box body 1, the current flows into the surface of the distribution box body 1, and then, under the conduction action of the conductive plate 4 and the wire 3, the current enters the interior of the leakage detection device body 2, causing the leakage detection device body 2 to issue an alarm prompt. The sides of the several conductive plates 4 are in contact with the outer wall of the distribution box body 1. The side of the distribution box body 1 is provided with an extrusion component 13, which provides an extrusion effect on the conductive plate 4.

[0026] The conductive plate 4 is tightly fitted to the outer wall of the distribution box 1 to prevent the conductive plate 4 from separating from the distribution box 1, thereby improving the leakage detection effect of the leakage detection device on the cables inside the distribution box. The extrusion assembly 13 includes a screw 16 and a sealed bearing 17. The outer ring of the sealed bearing 17 is embedded and fixedly connected to the distribution box 1. The inner ring of the sealed bearing 17 is interference-fitted with the screw 16. The provided sealed bearing 17 fixes the rotation position of the screw 16 and realizes the relative rotation of the screw 16 and the distribution box 1. 16 is threadedly connected to a connecting plate 15, so that during the rotation of the screw rod 16, the connecting plate 15 moves along the threaded path of the screw rod 16, and an L-shaped movable plate 14 for squeezing the conductive plate 4 is welded on the top surface of the connecting plate 15, thereby facilitating the movement of the connecting plate 15 toward the side close to the distribution box body 1, thereby strengthening the squeezing force of the movable plate 14 on the conductive plate 4, thereby achieving a close fit between the conductive plate 4 and the outer wall of the distribution box body 1, and improving the leakage detection effect of the leakage detection device on the cables inside the distribution box.

[0027] The inner wall of the movable plate 14 is slidably connected to the distribution box body 1, and the moving path of the movable plate 14 is fixed to prevent the movable plate 14 from rotating, thereby improving the lateral movement stability of the movable plate 14. A knob 18 is welded on the end face of the screw rod 16, and the bottom surface of the leakage detection device body 2 is fixedly connected to the distribution box body 1 by bolts. The top surface of the distribution box body 1 is provided with a clamping component 5. The clamping component 5 provides a clamping and fixing effect on the wire 3 to prevent the wire 3 from frequently shaking and deviating, which causes the electrical connection between the wire 3 and the leakage detection device body 2 to be detached, thereby improving the structural stability of the device components, and thereby improving the leakage detection effect of the leakage detection device on the cables inside the distribution box.

[0028] The clamping assembly 5 includes a fixing plate 6 for providing support for a plurality of conductors 3 and an inverted U-shaped supporting plate 7. The top and bottom surfaces of the fixing plate 6 are welded to the supporting plate 7 and the distribution box 1 respectively. A threaded sleeve 8 is embedded in the top surface of the supporting plate 7 and fixedly connected. The threaded sleeve 8 is threadedly connected to a threaded rod 9 to facilitate the threaded rod 9 to move along the threaded path of the threaded sleeve 8. A rotating block 10 and a limit bearing 11 are provided on the top and bottom surfaces of the threaded rod 9 respectively. The outer ring of the limit bearing 11 is embedded in a fixed connection for squeezing a plurality of conductors. The movable plate 12 of the wire 3 realizes the relative rotation of the movable plate 12 and the threaded rod 9 through the set limit bearing 11, and is convenient for controlling the distance between the movable plate 12 and the fixed plate 6. The movable plate 12 and the fixed plate 6 move centripetally to achieve clamping and fixation of several wires 3. The inner wall of the support plate 7 is slidingly connected to the movable plate 12 to improve the longitudinal movement stability of the movable plate 12, prevent the movable plate 12 from rotating during movement, and improve the structural stability of the device parts. A box door 19 is installed on the outer wall of the distribution box body 1.

[0029] The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. Moreover, the present invention is mainly used to protect mechanical devices, so the present invention will not explain the control method and circuit connection in detail.

[0030] How it works

[0031] When the user uses the cable leakage detection device for the distribution box, the user guides the current leaked from the internal circuit of the distribution box body 1 into the leakage detection device body 2 through the conductive plate 4 and the wire 3, causing the leakage detection device body 2 to issue an alarm prompt. The provided sealed bearing 17 fixes the rotation position of the screw rod 16, causing the screw rod 16 to rotate, thereby causing the connecting plate 15 to move along the thread path of the screw rod 16, causing the movable plate 14 to move toward the side close to the distribution box body 1, thereby strengthening the squeezing force of the movable plate 14 on the conductive plate 4, preventing the conductive plate 4 from detaching from the distribution box body 1, and improving the leakage detection effect of the leakage detection device on the cables inside the distribution box.

[0032] The rotating block 10 is rotated, and the threaded rod 9 is moved along the threaded path of the threaded sleeve 8. The movable plate 12 is moved downward during the transmission process, so that the movable plate 12 and the fixed plate 6 provide a clamping and fixing effect on the wire 3, preventing the wire 3 from frequently shaking and deviating, causing the electrical connection between the wire 3 and the distribution box 1 to be disconnected, thereby improving the leakage detection effect of the leakage detection device on the cables in the distribution box. The set limit bearing 11 realizes the relative rotation of the threaded rod 9 and the movable plate 12, and the set support plate 7 prevents the movable plate 12 from rotating during the longitudinal movement, thereby improving the structural stability of the device components.

[0033] It should be noted that, in this article, relational terms such as one and two are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "including an element defined by ... does not exclude the presence of other identical elements in the process, method, article or device that includes the element."

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cable leakage detection device for a distribution box, comprising a distribution box body (1), a leakage detection device body (2) for providing leakage detection and alarm functions for cables inside the distribution box body (1), and a plurality of wires (3) electrically connected to the internal circuit of the leakage detection device body (2), characterized in that: One end of the wire (3) away from the leakage detection device body (2) is electrically connected to a conductive plate (4) for conducting overflow current of the cable inside the distribution box (1), and several sides of the conductive plate (4) are in contact with the outer wall of the distribution box (1), and an extrusion component (13) is provided on the side of the distribution box (1); The extrusion assembly (13) includes a screw (16) and a sealed bearing (17), the outer ring of the sealed bearing (17) is embedded and fixedly connected to the distribution box (1), the inner ring of the sealed bearing (17) is interference-fitted with the screw (16), the screw (16) is threadedly connected to a connecting plate (15), and the top surface of the connecting plate (15) is welded with an L-shaped movable plate (14) for extruding the conductive plate (4).

2. A cable leakage detection device for a distribution box according to claim 1, characterized in that: The inner side wall of the movable plate (14) is slidably connected to the distribution box (1), and a knob (18) is welded to the end face of the screw rod (16).

3. A cable leakage detection device for a distribution box according to claim 2, characterized in that: The bottom surface of the leakage detection device body (2) is fixedly connected to the distribution box (1) via bolts, and the top surface of the distribution box (1) is provided with a clamping assembly (5).

4. A cable leakage detection device for a distribution box according to claim 3, characterized in that: The clamping assembly (5) comprises a fixing plate (6) for providing support for a plurality of conductors (3) and an inverted U-shaped support plate (7).

5. A cable leakage detection device for a distribution box according to claim 4, characterized in that: The top and bottom surfaces of the fixing plate (6) are respectively welded to the support plate (7) and the distribution box body (1); a threaded sleeve (8) is embedded and fixedly connected to the top surface of the support plate (7).

6. A cable leakage detection device for a distribution box according to claim 5, characterized in that: The threaded sleeve (8) is threadedly connected to a threaded rod (9), and a rotating block (10) and a limiting bearing (11) are respectively provided on the top surface and the bottom surface of the threaded rod (9).

7. A cable leakage detection device for a distribution box according to claim 6, characterized in that: A movable plate (12) for squeezing a plurality of wires (3) is fixedly embedded in the outer ring of the limit bearing (11), and the inner side wall of the support plate (7) is slidably connected to the movable plate (12).

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