Cable current transformer

Abstract

The utility model discloses a cable current transformer which is characterized in that a semicircular magnetic ring is arranged in each of a first shell and a second shell, a lead is wound on the circumferential outer wall of each semicircular magnetic ring, a coaxial connector is arranged on the outer wall of the first shell, one end of the coaxial connector is electrically connected with the lead, and the other end of the coaxial connector is electrically connected with the second shell. An electric contact plate is arranged at the two ends of the semicircular magnetic ring and located on the two sides of the semicircular through hole, an upper mounting plate and a lower mounting plate are arranged at the ends, away from the hinge shaft, of the first shell and the second shell respectively, and at least one positioning column is arranged on the side, opposite to the lower mounting plate, of the upper mounting plate. The surface of the lower mounting plate is provided with a positioning groove for embedding and mounting the positioning column, and a lock catch is arranged between the upper mounting plate and the lower mounting plate and on one side opposite to the first shell and the second shell. According to the cable current transformer, the position precision of closing of the shell is greatly improved, the situation of shell dislocation is effectively reduced, stable connection between the coils is guaranteed, and therefore the detection precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable detection, in particular to a cable current transformer. Background Art

[0002] Cable current transformers are used in low-voltage 400V side outlets, branch boxes, overhead lines, meter boxes, distribution boxes, etc. to monitor the current and voltage of low-voltage lines, collect data and transmit it to the upper control part. It has the functions of monitoring the line operation status and indicating the line fault status.

[0003] The cable current transformer is generally rotated and locked by two shells or covers, and a Rogowski coil is arranged in the cover to detect the cable. However, when the cover is rotated, it often deviates left and right, causing the upper and lower covers to be misaligned, affecting the connection of the coil and thus affecting the detection. Utility Model Content

[0004] The utility model aims to provide a cable current transformer, which greatly improves the position accuracy of shell closure, effectively reduces the shell misalignment, ensures the stable connection between coils, and thus improves the detection accuracy.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a cable current transformer, comprising: a first shell, a second shell, one end of the first shell is rotatably hinged with one end of the second shell, and a semicircular through hole is respectively arranged on the opposite sides of the first shell and the second shell, a semicircular magnetic ring is respectively arranged inside the first shell and the second shell, a wire is wound around the circumferential outer wall of the semicircular magnetic ring, a coaxial connector is arranged on the outer wall of the first shell, and one end of the coaxial connector is electrically connected to the wire, and an electric contact plate is arranged at both ends of the semicircular magnetic ring and on both sides of the semicircular through hole;

[0006] An upper mounting plate and a lower mounting plate are respectively arranged at one end of the first shell and the second shell away from the hinge axis, at least one positioning column is arranged on the side of the upper mounting plate opposite to the lower mounting plate, and a positioning groove for the positioning column to be embedded and installed is opened on the surface of the lower mounting plate, and a lock is arranged between the upper mounting plate and the lower mounting plate and on the side opposite to the first shell and the second shell.

[0007] The further improved scheme in the above technical scheme is as follows:

[0008] 1. In the above solution, the lock further includes a connecting seat and a pull buckle, the pull buckle is fixedly mounted on the outer wall of the upper mounting plate, and the connecting seat is fixedly mounted on the outer wall of the lower mounting plate.

[0009] 2. In the above solution, two positioning columns are provided.

[0010] 3. In the above solution, the positioning column is a round column or a square column.

[0011] 4. In the above solution, the positioning groove is a circular groove or a square groove.

[0012] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0013] The utility model discloses a cable current transformer, wherein the coaxial connector located on the outer wall of the first shell is electrically connected to the wire, and an electric contact plate is arranged at the two ends of the two semicircular magnetic rings and on both sides of the semicircular through hole; an upper mounting plate and a lower mounting plate are respectively arranged at one end of the first shell and the second shell away from the hinge axis, at least one positioning column is arranged on the side of the upper mounting plate relative to the lower mounting plate, and a positioning groove for the positioning column to be embedded and installed is opened on the surface of the lower mounting plate, and a lock is arranged between the upper mounting plate and the lower mounting plate and on the side opposite to the first shell and the second shell. On the basis of realizing the detection of the cable, the positioning column is embedded in the positioning groove, so that the position accuracy of the closing of the first shell and the second shell is greatly improved, and the situation that the misalignment between the first shell and the second shell causes the detection accuracy to be reduced is effectively reduced, and the lock keeps the first shell and the second shell stably connected, which greatly improves the stability of the connection between the electric contact plates of the coil, thereby improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 This is a front view of the overall structure of the cable current transformer of the utility model;

[0015] Attached Figure 2 This is a three-dimensional diagram of the internal structure of the cable current transformer of the utility model;

[0016] Attached Figure 3 This is a partial structural exploded view of the cable current transformer of the utility model.

[0017] In the above figures: 1, first shell; 2, upper mounting plate; 3, lock; 31, connecting seat; 32, pull buckle; 4, semicircular through hole; 5, electric contact plate; 6, wire; 7, semicircular magnetic ring; 8, coaxial connector; 9, hinge; 10, second shell; 11, lower mounting plate; 12, positioning column; 13, positioning groove. DETAILED DESCRIPTION

[0018] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0019] Embodiment 1: A cable current transformer, comprising: a first shell 1 and a second shell 10, wherein one end of the first shell 1 is rotatably hinged to one end of the second shell 10, and a semicircular through hole 4 is respectively provided on opposite sides of the first shell 1 and the second shell 10, a semicircular magnetic ring 7 is respectively provided inside the first shell 1 and the second shell 10, a wire 6 is wound around the circumferential outer wall of the semicircular magnetic ring 7, a coaxial connector 8 is provided on the outer wall of the first shell 1, and one end of the coaxial connector 8 is electrically connected to the wire 6, and an electric contact plate 5 is provided at both ends of the semicircular magnetic ring 7 and on both sides of the semicircular through hole 4;

[0020] By placing the cable to be tested in the semicircular through hole, and then fixing the second shell and rotating the first shell around the hinge axis so that the positioning column is embedded in the installation positioning groove, and the electric contact plate on the first shell is connected with the electric contact plate on the second shell, the position accuracy of the electric contact plate contact is improved;

[0021] An upper mounting plate 2 and a lower mounting plate 11 are respectively arranged at one end of the first shell 1 and the second shell 10 away from the hinge axis, at least one positioning column 12 is arranged on the side of the upper mounting plate 2 opposite to the lower mounting plate 11, and a positioning groove 13 for the positioning column 12 to be embedded and installed is opened on the surface of the lower mounting plate 11, and a lock buckle 3 is arranged between the upper mounting plate 2 and the lower mounting plate 11 and on the side opposite to the first shell 1 and the second shell 10.

[0022] Then the inspector locks the first shell and the second shell together through the cooperation of the lock buckle, so that the two semicircular through holes are combined into a circular through hole, the cable to be inspected is located between the inner walls of the circular through hole and the two semicircular through holes clamp and limit the cable.

[0023] There are two positioning posts 12 ; the two positioning posts 12 are symmetrically arranged.

[0024] The positioning column 12 is a circular column; the positioning groove 13 is a circular groove.

[0025] Embodiment 2: A cable current transformer, comprising: a first shell 1 and a second shell 10, wherein one end of the first shell 1 is rotatably hinged to one end of the second shell 10, and a semicircular through hole 4 is respectively provided on opposite sides of the first shell 1 and the second shell 10, and a semicircular magnetic ring 7 is respectively provided inside the first shell 1 and the second shell 10, and a wire 6 is wound around the circumferential outer wall of the semicircular magnetic ring 7, a coaxial connector 8 is provided on the outer wall of the first shell 1, and one end of the coaxial connector 8 is electrically connected to the wire 6, and an electric contact plate 5 is provided at both ends of the semicircular magnetic ring 7 and on both sides of the semicircular through hole 4;

[0026] On the basis of realizing the detection of the cable, the positioning column is embedded in the positioning groove, and the lock maintains the stable connection between the first shell and the second shell, which greatly improves the position accuracy of the closure of the first shell and the second shell, and effectively reduces the misalignment between the first shell and the second shell that causes the decrease in detection accuracy.

[0027] An upper mounting plate 2 and a lower mounting plate 11 are respectively arranged at one end of the first shell 1 and the second shell 10 away from the hinge axis, at least one positioning column 12 is arranged on the side of the upper mounting plate 2 relative to the lower mounting plate 11, and a positioning groove 13 for the positioning column 12 to be embedded and installed is opened on the surface of the lower mounting plate 11, and a lock buckle 3 is arranged between the upper mounting plate 2 and the lower mounting plate 11 and on the side opposite to the first shell 1 and the second shell 10. When the first shell 1 and the second shell 10 are rotated and locked, the cable to be tested is located between the inner walls of the two semicircular through holes 4 and is electrically connected between the electric contact plates 5 respectively located on the first shell 1 and the second shell 10.

[0028] The lock keeps the first shell and the second shell stably connected, greatly improving the stability of the connection between the electric contact plates of the coil, thereby improving the detection accuracy.

[0029] The lock buckle 3 further comprises a connecting seat 31 and a buckle 32 . The buckle 32 is fixedly mounted on the outer wall of the upper mounting plate 2 , and the connecting seat 31 is fixedly mounted on the outer wall of the lower mounting plate 11 .

[0030] The positioning column 12 is a square column; the positioning groove 13 is a square groove.

[0031] The first housing 1 and the second housing 10 are rotatably hinged via a hinge 9 .

[0032] The working principle is:

[0033] When in use, the cable to be detected is placed in the semicircular through hole, and then the second shell is fixed and the first shell is rotated around the hinge axis so that the positioning column is embedded in the installation positioning groove, and the electric contact plate on the first shell is connected with the electric contact plate on the second shell, thereby improving the contact position accuracy of the electric contact plate;

[0034] Then the inspector locks the first shell and the second shell together through the cooperation of the lock buckle, so that the two semicircular through holes are combined into a circular through hole, the cable to be inspected is located between the inner walls of the circular through hole and the two semicircular through holes clamp and limit the cable.

[0035] When the above-mentioned cable current transformer is used, it greatly improves the position accuracy of the closure of the first shell and the second shell on the basis of realizing cable detection, effectively reduces the situation where the misalignment between the first shell and the second shell causes a decrease in detection accuracy, and the lock maintains a stable connection between the first shell and the second shell, greatly improving the stability of the connection between the electric contact plates of the coil, thereby improving the detection accuracy.

[0036] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A cable current transformer, comprising: A first shell (1) and a second shell (10), one end of the first shell (1) being rotatably hinged to one end of the second shell (10), and a semicircular through hole (4) being provided on opposite sides of the first shell (1) and the second shell (10), characterized in that: a semicircular magnetic ring (7) is provided inside the first shell (1) and the second shell (10), a wire (6) is wound around the circumferential outer wall of the semicircular magnetic ring (7), a coaxial connector (8) is provided on the outer wall of the first shell (1), and one end of the coaxial connector (8) is electrically connected to the wire (6), and an electric contact plate (5) is provided at both ends of the semicircular magnetic ring (7) and on both sides of the semicircular through hole (4); An upper mounting plate (2) and a lower mounting plate (11) are respectively arranged at one end of the first shell (1) and the second shell (10) away from the hinge axis; at least one positioning column (12) is arranged on the side of the upper mounting plate (2) opposite to the lower mounting plate (11); a positioning groove (13) for the positioning column (12) to be embedded and installed is provided on the surface of the lower mounting plate (11); and a lock buckle (3) is arranged between the upper mounting plate (2) and the lower mounting plate (11) and on the side opposite to the first shell (1) and the second shell (10).

2. The cable current transformer according to claim 1, characterized in that: The lock buckle (3) further comprises a connecting seat (31) and a pull buckle (32), wherein the pull buckle (32) is fixedly mounted on the outer wall of the upper mounting plate (2), and the connecting seat (31) is fixedly mounted on the outer wall of the lower mounting plate (11).

3. The cable current transformer according to claim 1 or 2, characterized in that: Two positioning columns (12) are provided.

4. The cable current transformer according to claim 1, characterized in that: The positioning column (12) is a circular column or a square column.

5. The cable current transformer according to claim 1 or 4, characterized in that: The positioning groove (13) is a circular groove or a square groove.

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