CN111863418B - A current transformer for preventing reverse power supply - Google Patents

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 current transformer power taking by just using the exposed wire core at the protection position of the intermediate wire box.

Description

Anti-falling power supply type current transformer

Technical Field

The invention relates to the field of current transformers, in particular to an anti-falling power supply type current transformer.

Background

In the prior art, a current transformer needs to be electrified by puncturing the cable sheath through a puncture needle, for example, when the current transformer is installed outdoors, the puncture needle is easy to rust to influence the electricity-taking effect, and on the other hand, if the puncture needle is not strong enough and the cable sheath is harder, the puncture needle is easy to bend, and at the moment, the situation that electricity cannot be taken or the electricity-taking voltage and current are unstable can exist to influence the actual measurement structure. And the anti-falling power supply protection device and the current transformer are installed on one circuit at present, so that the installation time is long under the condition of more circuits.

Disclosure of Invention

The invention aims to provide an anti-falling power supply type current transformer.

The invention has the innovation points that the invention not only can achieve the aim of simultaneously installing the open-close type current transformer and the anti-falling power supply protection device, but also can achieve the aim of taking power from the current transformer by just utilizing the exposed wire core at the protection part of the middle wire box, has good installation tightness and no exposed part, and is suitable for outdoor use.

In order to achieve the above purpose, the technical scheme of the invention is as follows:

The anti-tilting power supply type current transformer comprises a middle wire box for accommodating an exposed wire core of an insulated wire and end wire boxes which are respectively positioned at two ends of the exposed wire core of the insulated wire and are used for wrapping the insulated wire at two ends of the exposed wire core of the insulated wire, wherein the end wire boxes are divided into a first end wire box and a second end wire box, an open-close type current transformer is arranged at the first end wire box, the open-close type current transformer wraps the first end wire box, and the inner diameter of the open-close type current transformer is adaptive to the outer diameter of the first end wire box; the open-close type current transformer comprises two corresponding semicircular rings, one end of each semicircular ring is hinged, the other end of each semicircular ring is connected in a buckling mode, semicircular annular connecting plates are arranged on the same side of each semicircular ring, each intermediate wire box is composed of a first semicircular intermediate shell and a second semicircular intermediate shell which are matched in a buckling mode, the first semicircular intermediate shell and the second semicircular intermediate shell are hinged to the semicircular annular connecting plates on the side portions of the two semicircular rings respectively, the inner diameter of each intermediate wire box is matched with the outer diameter of each second end wire box in a buckling mode, the outer diameter of each intermediate wire box is matched with the outer diameter of each second end wire box in a buckling mode, the first semicircular intermediate shell is connected with the corresponding semicircular annular connecting plates in a buckling mode, the second end wire box is wrapped by the corresponding intermediate wire box, the corresponding semicircular annular connecting plates are partially wrapped by the corresponding semicircular intermediate wire boxes, a cavity for an insulated wire to pass through is formed in the middle portions of the open-close type current transformer, the intermediate wire boxes and the corresponding first end wire boxes and the second end wire boxes, and the open-close type current transformer are connected with exposed wire cores of the insulated wire.

Further, the first end wire box and the second end wire box are both composed of two semicircular end annular shells, one end of each semicircular end annular shell is hinged, and one end of each semicircular end annular shell is provided with a screw hole and is connected through a screw nut.

Further, a screw rotating handle is arranged on the screw.

Further, the inner wall of the middle wire box wrapping the second end wire box and the semicircular annular connecting plate is provided with a sealing gasket, and the contact part of the opening-closing type current transformer and the first end wire box is provided with the sealing gasket. The sealing waterproof performance is better.

Further, the semicircular annular connecting plate and the semicircular ring body are integrally formed.

Further, the inner wall of the semicircular middle shell is provided with a support, the support is provided with a metal spring, the free end part of the metal spring is connected with a conductive metal block, and the power taking wire is connected with the metal spring in the support. The electric wire is always connected with the exposed wire core of the insulated wire by the action of the metal spring without manual winding and unwinding contact.

Further, the inner wall of the semicircular middle shell body II is provided with a supporting seat, and the supporting seat are symmetrically arranged. The insulated wire bare wire core is supported, and the connection between the insulated wire bare wire core and the conductive metal block is further ensured.

The beneficial effects of the invention are as follows:

1. According to the invention, the anti-falling power supply protection device is combined with the open-close type current transformer, the middle wire box of the anti-falling power supply protection device is hinged to the open-close type current transformer, and then the electric lead of the open-close type current transformer is connected with the exposed wire core at the protection position of the middle wire box, so that the aim of simultaneously installing the open-close type current transformer and the anti-falling power supply protection device can be achieved, the purpose of taking power of the current transformer can be achieved by just utilizing the exposed wire core at the protection position of the middle wire box, the installation tightness is good, and the open-close type current transformer is not exposed at the outer part and is suitable for outdoor use.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

Fig. 2 is a schematic diagram of the anti-fall power supply type current transformer after being installed.

Detailed Description

The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

Embodiment 1 as shown in fig. 1 and 2, the anti-tilting power supply type current transformer comprises a middle wire box 2 for accommodating an exposed wire core 1 of an insulated wire and end wire boxes which are respectively positioned at two ends of the exposed wire core 1 of the insulated wire and are used for wrapping insulated wires 3 at two ends of the exposed wire core 1 of the insulated wire, wherein the end wire boxes are divided into a first end wire box 4 and a second end wire box 5, an opening-closing type current transformer 6 is arranged at the first end wire box 4, the opening-closing type current transformer 6 wraps the first end wire box 4, the inside diameter of the opening-closing type current transformer 6 is matched with the outside diameter of the first end wire box 4, the first end wire box 4 and the second end wire box 5 are respectively formed by two semicircular end annular shells, one end of each semicircular end annular shell is hinged, one end of each semicircular end annular shell is provided with a screw hole 7 and is connected through a screw 8 nut, and a screw handle 8.1 is arranged on each screw 8. The open-close type current transformer 6 comprises two corresponding semicircular ring bodies 6.1, one end of each semicircular ring body 6.1 is hinged, the other end of each semicircular ring body is connected in a buckling mode, semicircular annular connecting plates 6.2 are arranged on the same side of each semicircular ring body 6.1, and the semicircular annular connecting plates 6.2 and the semicircular ring bodies 6.1 are integrally formed. The middle wire box 2 is composed of a first semicircular middle shell 2.1 and a second semicircular middle shell 2.2 which are matched in a buckling manner, the first semicircular middle shell 2.1 and the second semicircular middle shell 2.2 are hinged to semicircular annular connecting plates 6.2 on the side parts of the two semicircular ring bodies 6.1 respectively, the inner diameter of the middle wire box 2 is matched in a buckling manner, the outer diameter of the second end wire box 5 and the outer diameter of the two semicircular annular connecting plates 6.2 are matched in a buckling manner after the middle wire box 2 is matched in a buckling manner, the first semicircular middle shell 2.1 and the second semicircular middle shell 2.2 are located on two sides of one end of the second end wire box 5 and are connected in a buckling manner, the middle wire box 2 wraps part of the second end wire box 5 and part of the semicircular annular connecting plates 6.2, a cavity for an insulated wire 3 to pass through is formed in the middle of the middle wire box 2 and the first end wire box 4, an electric wire taking 6.3 of the open-close type current transformer 6 is connected with an exposed wire core 1 of the insulated wire, a support 9 is arranged on the inner wall of the first semicircular middle shell 2.1, a metal spring 10 is arranged on the support 9, and a free end part of the metal spring 10 is connected with the metal electric wire taking end 11 in the metal spring 3, and the metal electric wire taking support 10 is connected with the metal spring 10. The inner wall of the second semicircular middle shell 2.2 is provided with a supporting seat 12, and the supporting seat 12 and the supporting seat 9 are symmetrically arranged. The inner wall of the middle wire box 2, which wraps the second end 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 type current transformer 6 and the first end wire box 4 is provided with a sealing gasket.

When the anti-falling power supply type current transformer is used, a corresponding anti-falling power supply type current transformer is selected according to the model specification of an insulated wire 3, after the model is determined, an insulated sheath is stripped at a proper position of the insulated wire 3, a wire core part is exposed, a waterproof adhesive tape is wound on a part, close to the insulated sheath, of the exposed wire core 1 of the insulated wire, a first end wire box 4 and a second end wire box 5 are respectively fixed on the insulated wire 3 at two ends of the exposed wire core 1 of the insulated wire, an open-close type current transformer 6 is fixed on the first end wire box 4, finally, the middle wire box 2 is matched in a buckling butt joint mode, the exposed wire core part is closed, a conductive metal block 11 is in contact with the exposed wire core 1 of the insulated wire, and electricity taking of the open-close type current transformer 6 can be realized.

The described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Claims (4)

1. A reverse power supply prevention current transformer, characterized in that it comprises an intermediate wire box for accommodating the exposed core of the insulated wire and an end wire box 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 box is 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 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 buckle-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 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 of 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; the open-close current transformer, the intermediate wire box, the first terminal wire box, and the second terminal wire box form a cavity in the middle 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 is characterized in that 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. 3. The anti-reverse power supply type current transformer according to claim 2, characterized in that a screw handle is provided on the screw. 4. The anti-reverse power supply type current transformer according to claim 1 is characterized in that the semicircular ring connecting plate and the semicircular ring body are integrally formed.