Cable grounding box capable of replacing sheath protector without power cut

Abstract

The utility model discloses a cable grounding box capable of replacing a sheath protector without power cut, which comprises a box body, and a grounding bar, a sheath protector, a first connecting sheet and an inner conductor terminal which are arranged in the box body and are connected in sequence, and the grounding bar is connected with a main grounding wire through a main grounding terminal; the electric connector is characterized in that the first connecting sheet and the inner conductor terminal are connected through a switch unit; the switch unit comprises a first contact arranged at one end, facing the inner conductor terminal, of the first connecting piece, a second contact arranged at one end, facing the first connecting piece, of the inner conductor terminal, and a disconnecting link connected between the first contact and the second contact. The switch unit is arranged between the first connecting piece connected with the sheath protector and the inner conductor terminal, and the disconnecting link is used for controlling the connection and disconnection between the sheath protector and the inner conductor, so that the sheath protector of the cable grounding box can be replaced without cutting off power, and the processing period of related defects in the cable grounding box is greatly shortened.

Description

Technical Field

[0001] The utility model relates to the field of cable grounding boxes, in particular to a cable grounding box capable of replacing a sheath protector without power outage. Background Art

[0002] The cable grounding box is connected between the cable sheath and the ground. It is equipped with a cable sheath protector, a grounding copper bus, an inner conductor and an outer conductor, etc., which are used for protective grounding of the cable sheath.

[0003] As shown in the attached drawing of a high-voltage self-dehumidifying intelligent grounding box disclosed in CN112762989A, due to the small space inside the current cable grounding box, the inner conductor and the sheath protector of most cable grounding boxes are directly connected through a connecting piece. During the operation of the cable, the cable grounding box may have defects such as damage to the cable sheath protector and corrosion and heating of the main cable grounding wire, which need to be dealt with in a short time. It is necessary to disassemble the connecting piece, disconnect the inner conductor from the ground, shut down the cable line, and then replace the sheath protector and the cable grounding wire, which is very inconvenient.

[0004] In view of the problem that the current cable grounding box needs to shut down the cable line for processing when dealing with sheath protectors and grounding defects, and the power outage operation is also very inconvenient, it is necessary to develop a cable grounding box that can handle sheath protectors and grounding defects without power outage and can replace sheath protectors without power outage, which is inconvenient to operate. Utility Model Content

[0005] The utility model aims to provide a cable grounding box capable of replacing a sheath protector without power outage, so as to solve the problem that the existing cable grounding box needs to shut down the cable line for processing the sheath protector and grounding defects, and the power outage operation is also very inconvenient.

[0006] In order to solve the above technical problems, the present invention provides a cable grounding box capable of replacing a sheath protector without power outage, comprising a box body and a grounding bar, a sheath protector, a first connecting piece and an inner conductor terminal connected in sequence and installed in the box body, wherein the grounding bar is connected to a main grounding wire via a main grounding terminal; the characterised in that the first connecting piece and the inner conductor terminal are connected via a switch unit; the switch unit comprises a first contact arranged at one end of the first connecting piece facing the inner conductor terminal, a second contact arranged at one end of the inner conductor terminal facing the first connecting piece, and a knife switch connected between the first contact and the second contact.

[0007] Furthermore, a second connecting piece is provided at one end of the inner conductor terminal facing the first connecting piece, and the second contact is fixedly mounted on the second connecting piece.

[0008] Furthermore, a bending portion is respectively provided at both ends of the grounding bar, the main grounding terminal is connected between one of the bending portions and the box body, and a spare grounding terminal is provided between the other bending portion of the grounding bar and the box body.

[0009] Furthermore, the grounding bus is provided with a first mounting hole which conforms to the upper terminal of the sheath protector, and a first notch which enables the upper terminal to enter and exit the first mounting hole is provided on one side of the first mounting hole; the upper terminal is locked in the first mounting hole by a first nut which matches the upper terminal.

[0010] Furthermore, a first gasket is provided between the first nut and the grounding bar.

[0011] Furthermore, the first connecting piece is in an inverted L-shape, including a vertical portion and a horizontal portion, the horizontal portion is provided with a second mounting hole that conforms to the lower terminal post of the sheath protector, and one side of the second mounting hole is provided with a second notch that enables the lower terminal post to enter and exit the second mounting hole; the lower terminal post is locked in the second mounting hole by a second nut that matches the lower terminal post.

[0012] Furthermore, a second gasket is provided between the second nut and the horizontal portion of the first connecting piece.

[0013] The beneficial effects of the utility model are as follows: by arranging a switch unit between the first connecting piece of the sheath protector and the inner conductor terminal, when it is necessary to replace the sheath protector, a spare protective grounding box prepared in advance is used, and the three-phase protector of the spare protective grounding box is connected to the three phases of the knife switch with a wire clamp, and after the connection is completed, the knife switch is opened, and after the sheath protector to be replaced is replaced, the knife switch is closed, and finally the wire clamp is removed, thereby realizing the replacement of the sheath protector of the cable grounding box without power outage, which greatly shortens the processing cycle of related defects in the cable grounding box. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The same reference numerals are used in these drawings to represent the same or similar parts. The exemplary embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0015] Figure 1 The figure is a schematic diagram of the internal structure of an embodiment of the utility model.

[0016] Figure 2 The figure is a schematic diagram of the external structure of an embodiment of the utility model.

[0017] Figure 3 FIG. 1 is a top view of a grounding bar according to an embodiment of the present invention.

[0018] Figure 4This is a top view of a sheath protector according to an embodiment of the utility model when it is installed on a grounding bar.

[0019] Figure 5 This is a front view of a first connecting piece according to an embodiment of the utility model.

[0020] Figure 6 This is a bottom view of a first connecting piece according to an embodiment of the utility model.

[0021] Figure 7 This is a bottom view of a sheath protector according to an embodiment of the utility model when it is installed on a first connecting piece.

[0022] Among them: 1. grounding bar; 11. bending part; 12. first mounting hole; 13. first notch; 14. first nut; 15. first gasket; 2. main grounding terminal; 21. spare grounding terminal; 3. sheath protector; 31. upper terminal; 32. lower terminal; 4. first connecting piece; 41. vertical part; 411. gasket mounting hole; 42. horizontal part; 421. second mounting hole; 422. second notch; 43. second nut; 44. second gasket; 5. knife switch; 51. first contact 51; 52. second contact 52; 6. wire clamp; 7. inner conductor terminal; 8. cable; 9. spare protective grounding box. DETAILED DESCRIPTION

[0023] like Figure 1 The cable grounding box shown in the figure, which can replace the sheath protector without power outage, includes a box body and a grounding bar 1, a sheath protector 3, a first connecting piece 4 and an inner conductor terminal 7 which are connected in sequence and installed in the box body. The grounding bar 1 is connected to the main grounding wire through the main grounding terminal 2; the first connecting piece 4 and the inner conductor terminal 7 are connected through a switch unit; the switch unit includes a first contact 51 arranged at one end of the first connecting piece 4 facing the inner conductor terminal 7, a second contact 52 arranged at one end of the inner conductor terminal 7 facing the first connecting piece 4, and a knife switch 5 connected between the first contact 5151 and the second contact 5252.

[0024] By setting a switch unit between the first connecting piece 4 connecting the sheath protector 3 and the inner conductor terminal 7, when it is necessary to replace the sheath protector 3, the spare protective grounding box 9 prepared in advance is used, and the three-phase protector of the spare protective grounding box 9 is connected to the three phases of the knife switch 5 with the wire clamp 6 and the cable 8. After the connection, the knife switch 5 is pulled open, and after the sheath protector 3 to be replaced is replaced, the knife switch 5 is closed, and finally the wire clamp 6 is removed, thereby realizing the replacement of the sheath protector 3 of the cable 8 grounding box without power outage, which greatly shortens the processing cycle of related defects in the cable 8 grounding box.

[0025] According to an embodiment of the present application, a second connection piece is provided at one end of the inner conductor terminal 7 facing the first connection piece 4, and the second contact 52 is fixedly mounted on the second connection piece. By providing the second connection piece, not only the second contact 52 can be conveniently connected, but also the mutual influence between the second contact 52 and the cross-connection pressure plate can be avoided; the knife switch 5 is hinged with the second contact 52, and when the knife switch 5 is closed, the knife switch 5 contacts the second contact point along the hinge point; when the knife switch 5 is opened, the knife switch 5 moves away from the second contact point along the hinge point.

[0026] According to one embodiment of the present application, Figure 1 and Figure 2 As shown, a bending portion 11 is provided at each end of the grounding bar 1, a main grounding terminal 2 is connected between one of the bending portions 11 and the box, and a spare grounding terminal 21 is provided between the other bending portion 11 of the grounding bar 1 and the box. By providing a grounding terminal at each end of the grounding bar 1; when the main grounding wire needs to be replaced without power outage, a new main grounding wire can be installed at the spare grounding terminal 21 before the corroded and heated grounding wire is removed; when the spare grounding wire also needs to be replaced, a new main grounding wire can be installed at the main grounding terminal 2 before the corroded and heated grounding wire is removed.

[0027] According to one embodiment of the present application, Figure 3 and Figure 4 As shown, the grounding bar 1 is provided with a first mounting hole 12 which conforms to the upper terminal 31 of the sheath protector 3, and a first notch 13 which enables the upper terminal 31 to enter and exit the first mounting hole 12 is provided on one side of the first mounting hole 12; the upper terminal 31 is locked in the first mounting hole 12 by a first nut 14 which matches the upper terminal 31. By providing the first notch 13 on the side of the first mounting hole 12, when the sheath protector 3 is disassembled, the upper terminal 31 of the sheath protector 3 can directly enter and exit the first mounting hole 12 through the first notch 13, and the installation is very convenient.

[0028] According to one embodiment of the present application, Figure 4 As shown, a first gasket 15 is provided between the first nut 14 and the grounding bar 1. By providing the first gasket 15, the contact area can be increased, thereby protecting the grounding bar 1 and preventing the sheath protector 3 from loosening due to vibration or impact.

[0029] According to one embodiment of the present application, Figure 5 , Figure 6 and Figure 7As shown, the first connecting piece 4 is in an inverted L-shape, including a vertical portion 41 and a horizontal portion 42. The horizontal portion 42 is provided with a second mounting hole 421 that conforms to the lower terminal 32 of the sheath protector 3. A second notch 422 that enables the lower terminal 32 to enter and exit the second mounting hole 421 is provided on one side of the second mounting hole 421. The lower terminal 32 is locked in the second mounting hole 421 by a second nut 43 that matches the lower terminal 32. By providing the second notch 422 on the side of the second mounting hole 421, when disassembling the sheath protector 3, the lower terminal 32 of the sheath protector 3 can directly enter and exit the second mounting hole 421 through the second notch 422, without changing the first connecting piece 4, and the installation is very convenient.

[0030] According to one embodiment of the present application, Figure 7 As shown, a second gasket 44 is provided between the second nut 43 and the horizontal portion 42 of the first connecting piece 4. By providing the second gasket 44, the contact area can be increased, thereby protecting the first connecting piece 4 and preventing the sheath protector 3 from loosening due to vibration or impact.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A cable grounding box capable of replacing a sheath protector without power outage, comprising a box body and a grounding bar, a sheath protector, a first connecting piece and an inner conductor terminal connected in sequence and installed in the box body, wherein the grounding bar is connected to a main grounding wire through a main grounding terminal; characterized in that: The first connecting piece and the inner conductor terminal are connected via a switch unit; the switch unit comprises a first contact arranged at one end of the first connecting piece facing the inner conductor terminal, a second contact arranged at one end of the inner conductor terminal facing the first connecting piece, and a knife switch connected between the first contact and the second contact.

2. The cable grounding box capable of replacing the sheath protector without power outage according to claim 1 is characterized in that: A second connecting piece is provided at one end of the inner conductor terminal facing the first connecting piece, and the second contact is fixedly mounted on the second connecting piece.

3. The cable grounding box capable of replacing the sheath protector without power outage according to claim 1 is characterized in that: A bending portion is respectively provided at both ends of the grounding bar, the main grounding terminal is connected between one of the bending portions and the box body, and a spare grounding terminal is provided between the other bending portion of the grounding bar and the box body.

4. The cable grounding box capable of replacing the sheath protector without power outage according to claim 1, characterized in that: The grounding bar is provided with a first mounting hole that conforms to the upper terminal of the sheath protector, and one side of the first mounting hole is provided with a first notch that enables the upper terminal to enter and exit the first mounting hole; the upper terminal is locked in the first mounting hole by a first nut that matches the upper terminal.

5. The cable grounding box capable of replacing the sheath protector without power outage according to claim 4 is characterized in that: A first gasket is provided between the first nut and the grounding bar.

6. The cable grounding box capable of replacing the sheath protector without power outage according to claim 1, characterized in that: The first connecting piece is in an inverted L-shape, including a vertical portion and a horizontal portion, the horizontal portion is provided with a second mounting hole that conforms to the lower terminal post of the sheath protector, and one side of the second mounting hole is provided with a second notch that enables the lower terminal post to enter and exit the second mounting hole; the lower terminal post is locked in the second mounting hole by a second nut that matches the lower terminal post.

7. The cable grounding box capable of replacing the sheath protector without power outage according to claim 6, characterized in that: A second gasket is provided between the second nut and the horizontal portion of the first connecting piece.

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