A current transformer for preventing reverse power supply

Abstract

The present invention discloses a reverse power supply prevention type current transformer, comprising an intermediate wire box and end wire boxes respectively located at both ends of the exposed wire core of the insulated wire, the end wire boxes are divided into a No. 1 end wire box and a No. 2 end wire box, and an open-and-close current transformer is arranged at the No. 1 end wire box; the open-and-close current transformer comprises two corresponding semicircular ring bodies, and a semicircular annular connecting plate is arranged on the same side of the two semicircular ring bodies; the intermediate wire box is composed of a No. 1 semicircular intermediate shell and a No. 2 semicircular intermediate shell, and the No. 1 semicircular intermediate shell and the No. 2 semicircular intermediate shell are respectively hinged on the semicircular annular connecting plate; the power-taking wire of the open-and-close current transformer is connected with the exposed wire core of the insulated wire. The present invention can achieve the purpose of simultaneously installing the open-and-close current transformer and the reverse power supply prevention protection device, and can also achieve the purpose of taking power from the current transformer by just utilizing the exposed wire core at the protection position of the intermediate wire box.

Description

Technical Field

[0001] The invention relates to the field of current transformers, and in particular to a reverse power supply prevention type current transformer. Background Art

[0002] The current transformer in the prior art needs to use a needle to pierce the cable sheath to draw electricity. If the current transformer is installed outdoors, the needle is easy to rust, affecting the power-drawing effect. On the other hand, if the needle is not strong enough and the cable sheath is hard, the needle is easy to bend, and there will be a situation where no electricity can be drawn or the voltage and current of the electricity are unstable, affecting the actual measurement structure. In addition, it is necessary to install the anti-reverse power supply protection device and the current transformer twice on a line. In the case of more lines, the installation time is longer. Summary of the invention

[0003] The purpose of the present invention is to provide a reverse power supply prevention type current transformer.

[0004] The innovation of the present invention lies in that the present invention can achieve the purpose of simultaneously installing the open-and-closed current transformer and the anti-reverse power supply protection device, and can also use the exposed wire core at the protection position of the intermediate wire box to achieve the purpose of drawing power from the current transformer. In addition, this installation has good sealing performance, has no exposed parts, and is suitable for outdoor use.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution of the present invention is:

[0006] A reverse power supply prevention current transformer, comprising an intermediate wire box for accommodating an exposed core of an insulated wire and end wire boxes respectively located at both ends of the exposed core of the insulated wire and used to wrap the insulated wires at both ends of the exposed core of the insulated wire, the end wire boxes are divided into a No. 1 end wire box and a No. 2 end wire box, an open-and-closed current transformer is arranged at the No. 1 end wire box, the open-and-closed current transformer wraps part of the No. 1 end wire box, and the inner diameter of the open-and-closed current transformer is adapted to the outer diameter of the No. 1 end wire box; the open-and-closed current transformer comprises two corresponding semicircular ring bodies, one end of the two semicircular ring bodies is hinged, and the other end is buckled, and a semicircular annular connecting plate is arranged on the same side of the two semicircular ring bodies; the intermediate wire box is composed of a No. 1 semicircular ring body that is buckled and matched The first semicircular intermediate shell and the second semicircular intermediate shell are respectively hinged on the semicircular annular connecting plates on the sides of the two semicircular ring bodies; the inner diameter of the intermediate wire box after buckling is adapted to the outer diameter of the No. 2 terminal wire box and the outer diameter of the two semicircular annular connecting plates after closing, the No. 1 semicircular intermediate shell and the No. 2 semicircular intermediate shell are connected by snaps on both sides at one end of the No. 2 terminal wire box, and the intermediate wire box wraps part of the No. 2 terminal wire box and part of the semicircular annular connecting plate; a cavity for the insulated wire to pass through is formed in the middle of the open-close current transformer, the intermediate wire box, the No. 1 terminal wire box and the No. 2 terminal wire box, and the power-taking wire of the open-close current transformer is connected with the exposed core of the insulated wire.

[0007] Furthermore, the No. 1 terminal box and the No. 2 terminal box are both composed of two semicircular end ring shells, one end of the two semicircular end ring shells is hinged, and the other end is provided with a screw hole and connected by a screw nut.

[0008] Furthermore, the screw is provided with a screw handle.

[0009] Furthermore, the inner wall of the intermediate wire box where it wraps the No. 2 terminal wire box and the semicircular ring connecting plate is provided with a sealing gasket, and the contact part between the open-close current transformer and the No. 1 terminal wire box is provided with a sealing gasket, so that the sealing and waterproof performance is better.

[0010] Furthermore, the semicircular annular connecting plate and the semicircular ring body are integrally formed.

[0011] Furthermore, a support is provided on the inner wall of the first semicircular intermediate housing, a metal spring is provided on the support, a free end of the metal spring is connected to a conductive metal block, and the power-taking wire is connected to the metal spring in the support. There is no need to manually unwind the contact, and the metal spring can ensure that the power-taking wire is always connected to the exposed core of the insulated wire.

[0012] Furthermore, a support seat is provided on the inner wall of the second semicircular intermediate housing, and the support seat and the support are symmetrically arranged to support the exposed core of the insulated wire and further ensure the connection between the exposed core of the insulated wire and the conductive metal block.

[0013] The beneficial effects of the present invention are:

[0014] 1. In the present invention, the anti-reverse power supply protection device and the open-and-close current transformer are combined, the intermediate wire box of the anti-reverse power supply protection device is hinged on the open-and-close current transformer, and then the power-taking wire of the open-and-close current transformer is connected with the exposed wire core at the protection part of the intermediate wire box. This can achieve the purpose of installing the open-and-close current transformer and the anti-reverse power supply protection device at the same time, and can just use the exposed wire core at the protection part of the intermediate wire box to achieve the purpose of current transformer power taking. In addition, this installation has good sealing performance, no exposed parts, and is suitable for outdoor use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the anti-reverse power supply type current transformer after installation. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings.

[0018] Example 1: Figure 1, 2 As shown, a reverse power supply protection type current transformer comprises an intermediate wire box 2 for accommodating an exposed core 1 of an insulated conductor and end wire boxes respectively located at both ends of the exposed core 1 of the insulated conductor and used to wrap the insulated conductors 3 at both ends of the exposed core 1 of the insulated conductor, the end wire boxes are divided into a No. 1 end wire box 4 and a No. 2 end wire box 5, an open-and-close current transformer 6 is arranged at the No. 1 end wire box 4, the open-and-close current transformer 6 wraps part of the No. 1 end wire box 4, and the inner diameter of the open-and-close current transformer 6 is adapted to the outer diameter of the No. 1 end wire box 4; the No. 1 end wire box 4 and the No. 2 end wire box 5 are both composed of two semicircular end ring shells, one end of the two semicircular end ring shells is hinged, the other end is provided with a screw hole 7 and connected by a screw 8 and a nut, and the screw 8 is provided with a screw handle 8.1. The open-and-close current transformer 6 includes two corresponding semicircular ring bodies 6.1, one end of the two semicircular ring bodies 6.1 is hinged, and the other end is snap-connected, and a semicircular annular connecting plate 6.2 is provided on the same side of the two semicircular ring bodies 6.1; the semicircular annular connecting plate 6.2 and the semicircular ring bodies 6.1 are integrally formed. The intermediate wire box 2 is composed of a No. 1 semicircular intermediate shell 2.1 and a No. 2 semicircular intermediate shell 2.2 that fit together, and the No. 1 semicircular intermediate shell 2.1 and the No. 2 semicircular intermediate shell 2.2 are hinged on the semicircular annular connecting plates 6.2 on the sides of the two semicircular ring bodies 6.1 respectively; after the intermediate wire box 2 is snap-fitted, the inner diameter is adapted to the outer diameter of the No. 2 terminal wire box 5 and the outer diameter of the two semicircular annular connecting plates 6.2 after closing, and the No. 1 semicircular intermediate shell 2.1 and the No. 2 semicircular intermediate shell 2.2 are snap-connected on both sides at one end of the No. 2 terminal wire box 5. , the intermediate wire box 2 wraps part of the No. 2 terminal wire box 5 and part of the semicircular annular connecting plate 6.2; the middle of the open-close current transformer 6, the intermediate wire box 2, the No. 1 terminal wire box 4, and the No. 2 terminal wire box 5 form a cavity for the insulated wire 3 to pass through, and the power-taking wire 6.3 of the open-close current transformer 6 is connected to the exposed wire core 1 of the insulated wire; the inner wall of the No. 1 semicircular intermediate shell 2.1 is provided with a support 9, and a metal spring 10 is provided on the support 9. The free end of the metal spring 10 is connected to the conductive metal block 11, and the power-taking wire 6.3 is connected to the metal spring 10 in the support 9. The inner wall of the No. 2 semicircular intermediate shell 2.2 is provided with a support seat 12, and the support seat 12 and the support 9 are symmetrically arranged. The inner wall of the intermediate wire box 2 wrapping the No. 2 terminal wire box 5 and the semicircular annular connecting plate 6.2 is provided with a sealing gasket, and the contact part of the open-close current transformer 6 and the No. 1 terminal wire box 4 is provided with a sealing gasket.

[0019] When in use, select the corresponding anti-reverse power supply type current transformer according to the model and specifications of the insulated conductor 3. After determining the model, peel off the insulating sheath at the appropriate position of the insulated conductor 3 to expose the core part, wrap the waterproof tape around the exposed core 1 of the insulated conductor close to the insulating sheath, fix the No. 1 terminal box 4 and the No. 2 terminal box 5 on the insulated conductor 3 at both ends of the exposed core 1 of the insulated conductor respectively, and then fix the open and close current transformer 6 on the No. 1 terminal box 4, and finally, dock the intermediate box 2 with the snap-fit ​​to close the exposed core part, so that the conductive metal block 11 is in contact with the exposed core 1 of the insulated conductor, and the open and close current transformer 6 can also be powered.

[0020] The described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A current transformer for preventing reverse power supply, characterized in that: It includes an intermediate wire box for accommodating the exposed core of the insulated wire and an end wire box respectively located at the two ends of the exposed core of the insulated wire and used to wrap the insulated wires at the two ends of the exposed core of the insulated wire. The end wire box is divided into a No. 1 end wire box and a No. 2 end wire box. The No. 1 end wire box is provided with an open-close current transformer, and the open-close current transformer wraps part of the No. 1 end wire box. The inner diameter of the open-close current transformer is adapted to the outer diameter of the No. 1 end wire box; the open-close current transformer includes two corresponding semicircular ring bodies, one end of the two semicircular ring bodies is hinged, and the other end is buckled, and the same side of the two semicircular ring bodies is provided with a semicircular annular connecting plate; the intermediate wire box is composed of a No. 1 semicircular intermediate shell and a buckle-matched No. 1 semicircular intermediate shell. The second semicircular intermediate shell is composed of a first semicircular intermediate shell and a second semicircular intermediate shell, respectively hinged on the semicircular annular connecting plates on the sides of the two semicircular ring bodies; the inner diameter of the intermediate wire box after buckling is adapted to the outer diameter of the second terminal wire box and the outer diameter of the two semicircular annular connecting plates after closing; the first semicircular intermediate shell and the second semicircular intermediate shell are connected by snaps on both sides at one end of the second terminal wire box, and the intermediate wire box wraps part of the second terminal wire box and part of the semicircular annular connecting plate; a cavity is formed in the middle of the open-close current transformer, the intermediate wire box, the first terminal wire box, and the second terminal wire box for the insulated wire to pass through, and the power-taking wire of the open-close current transformer is connected to the exposed wire core of the insulated wire; The inner wall of the intermediate wire box where it wraps around the No. 2 terminal wire box and the semicircular ring-shaped connecting plate is provided with a sealing gasket, and the contact position between the open-close current transformer and the No. 1 terminal wire box is provided with a sealing gasket; The inner wall of the first semicircular intermediate shell is provided with a support, on which a metal spring is provided, the free end of the metal spring is connected to a conductive metal block, and the power-taking wire is connected to the metal spring in the support; A support seat is provided on the inner wall of the second semicircular intermediate shell, and the support seat and the support seat are symmetrically arranged.

2. The anti-reverse power supply type current transformer according to claim 1, characterized in that: The No. 1 terminal wire box and the No. 2 terminal wire box are both composed of two semicircular end ring shells, one end of the two semicircular end ring shells is hinged, and the other end is provided with a screw hole and connected by a screw nut.

3. The anti-reverse power supply type current transformer according to claim 2, characterized in that: The screw is provided with a screw handle.

4. The anti-reverse power supply type current transformer according to claim 1, characterized in that: The semicircular annular connecting plate and the semicircular ring body are integrally formed.

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