Buckle positioning device of annular current transformer

Abstract

The utility model relates to a buckle positioning device of an annular current transformer, which comprises two semi-ring mutual inductance units, any one of the semi-ring mutual inductance units is sleeved with a detachable buckle, the buckle is provided with a connecting part, the connecting part is provided with a rigid coil with a detachable wire, and the rigid coil is provided with a clamping groove. The axis of the rigid coil is parallel to the axis of an inner hole formed after the two semi-ring mutual inductance units are combined, and the beneficial effects are that the wire can be fixed through the detachable buckle and the rigid coil, the wire with the diameter smaller than that of the inner hole can be tested, and the accuracy of measured circuit data is improved; and the inner diameter of the rigid coil can be changed to adapt to electric wires with different wire diameters.

Description

Technical Field

[0001] This utility model relates to the field of current transformer technology, specifically to a snap-fit ​​positioning device for a toroidal current transformer. Background Technology

[0002] A current transformer is an instrument that measures current by converting a large primary current into a small secondary current based on the principle of electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series with the circuit whose current needs to be measured.

[0003] Therefore, it often carries the entire current of the circuit, resulting in a relatively large number of turns in the secondary winding. Connected in series with measuring instruments and protection circuits, the secondary circuit of the current transformer is always closed during operation. Consequently, the impedance of the series coils in the measuring instruments and protection circuits is very small, and the operating state of the current transformer is close to a short circuit. The current transformer converts a large primary current into a small secondary current for measurement; the secondary side must not be open-circuited.

[0004] A toroidal current transformer includes two semi-ring inductor units. The outer sides of one end of the two semi-ring inductor units are hinged together by a hinge shaft. The semi-ring inductor units can be opened by the hinge shaft, allowing the circuit to be tested to be placed between the two inductor units through the opening. The other end is provided with a locking part, which connects the two semi-ring inductor units to form a ring. When a circuit needs to be tested, the wire is passed through the inner hole formed by the combination of the two semi-ring inductor units. Therefore, the toroidal current transformer can be used to test wires smaller than the diameter of the inner hole. However, when encountering primary wires with a thinner diameter, it cannot be fixed, which may result in inaccurate circuit data or even failure to measure. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide a snap-fit ​​positioning device for a toroidal current transformer.

[0006] To achieve the above objectives, the technical solution of this utility model is to design a snap-fit ​​positioning device for a ring current transformer, comprising two semi-ring current transformer units, wherein a detachable snap-fit ​​is fitted onto any one of the semi-ring current transformer units, the snap-fit ​​having a connecting part, and a detachable rigid coil being provided on the connecting part, the axis of the rigid coil being parallel to the axis of the inner hole formed by the combination of the two semi-ring current transformer units.

[0007] A further preferred technical solution is that the buckle includes a first snap-fit ​​portion and a second snap-fit ​​portion. The first snap-fit ​​portion has snap-fit ​​ends at both ends, and the second snap-fit ​​portion has snap-fit ​​holes at both ends. The first snap-fit ​​portion is located on one side of the semi-ring mutual inductance unit, and the second snap-fit ​​portion is located on the other side of the semi-ring mutual inductance unit. The snap-fit ​​end of one end of the first snap-fit ​​portion engages with the snap-fit ​​hole of the corresponding end of the second snap-fit ​​portion, and the snap-fit ​​end of the other end of the first snap-fit ​​portion engages with the snap-fit ​​hole of the corresponding end of the second snap-fit ​​portion, so that the first snap-fit ​​portion and the second snap-fit ​​portion are fixedly fitted onto the semi-ring mutual inductance unit.

[0008] A further preferred technical solution is that the first snap-fit ​​portion has a first intermediate portion that matches the side of the semi-ring mutual inductance unit. The first intermediate portion is fan-shaped, and one end of the first intermediate portion has a snap-fit ​​end that bends toward the opposite side of the semi-ring mutual inductance unit. The other end of the first intermediate portion also has a snap-fit ​​end that bends toward the opposite side of the semi-ring mutual inductance unit.

[0009] A further preferred technical solution is that the second snap-fit ​​portion has a second intermediate portion that matches the side of the semi-ring mutual inductance unit. The second intermediate portion is fan-shaped, and one end of the second intermediate portion has a snap-fit ​​hole that bends toward the opposite side of the semi-ring mutual inductance unit. The other end of the second intermediate portion also has a snap-fit ​​hole that bends toward the opposite side of the semi-ring mutual inductance unit.

[0010] A further preferred technical solution is that the buckle includes a first clamp and a second clamp, with one end of the first clamp and the second clamp hinged together and the other end connected by bolts and nuts.

[0011] A further preferred technical solution is that the connecting part protrudes from the second snap-fit ​​part, the connecting part has a slot with an opening facing the outside of the second snap-fit ​​part, the slot is fan-shaped, and the rigid coil can be snapped into the slot.

[0012] The advantages and beneficial effects of this utility model are as follows: the wire can be fixed by the detachable buckle and rigid coil, which can be used to test wires smaller than the inner diameter, thus improving the accuracy of the measured circuit data. Moreover, it can be adapted to wires of different diameters by changing the inner diameter of the rigid coil. Attached Figure Description

[0013] Figure 1 This is one of the perspective views of this utility model;

[0014] Figure 2 This is the second perspective view of this utility model;

[0015] In the figure: 10, semi-ring mutual inductance unit; 20, first snap-fit ​​part; 21, first intermediate part; 22, snap-fit ​​end; 30, second snap-fit ​​part; 31, second intermediate part; 32, snap-fit ​​hole; 40, connecting part; 41, slot; 50, wire; 60, rigid coil. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0017] like Figures 1 to 2 As shown, the toroidal current transformer includes two semi-ring current transformer units 10. The outer sides of one end of each semi-ring current transformer unit 10 are hinged together via a hinge shaft. The semi-ring current transformer unit 10 can be opened via the hinge shaft, allowing the circuit to be tested to be placed between the two current transformer units 10 through the opening. A locking part is provided at the other end, which connects the two semi-ring current transformer units 10 to form a ring. The locking part includes a locking block and a locking plate. The locking block and locking plate are respectively disposed on the outer wall of the end of the two semi-ring current transformer units 10 away from the hinge axis. When the two semi-ring current transformer units 10 are fastened together, the locking block is engaged in the slot of the locking plate. The locking plate has a certain elasticity. By prying the locking plate outward, the locking block disengages from the slot, allowing the two current transformer units 10 to separate again. The semi-ring current transformer unit 10 has an annular mounting groove and a semi-circular assembly inside. The semi-circular assembly is disposed in the annular mounting groove. When it is necessary to test the circuit, the wire 50 is passed through the inner hole formed by the combination of the two semi-ring current transformer units 10. Therefore, the annular current transformer can be used to test small... When a wire with an inner diameter of 50 encounters a primary wire with a smaller diameter, it cannot be fixed, which may lead to inaccurate circuit data or even the inability to measure. This application provides a snap-fit ​​positioning device for a toroidal current transformer. A detachable snap-fit ​​is fitted onto any one of the semi-toroidal current transformer units 10. The snap-fit ​​has a connecting part 40, and a detachable rigid coil 60 is provided on the connecting part 40. The axis of the rigid coil 60 is parallel to the axis of the inner hole formed by the combination of two semi-toroidal current transformer units 10. Preferably, the axis of the rigid coil 60 coincides with the axis of the inner hole formed by the combination of two semi-toroidal current transformer units 10.

[0018] In one embodiment, the buckle includes a first engaging portion 20 and a second engaging portion 30. The first engaging portion 20 has engaging ends 22 at both ends, and the second engaging portion 30 has engaging holes 32 at both ends. The first engaging portion 20 is located on one side of the semi-ring mutual inductance unit 10, and the second engaging portion 30 is located on the other side of the semi-ring mutual inductance unit 10. One engaging end 22 of the first engaging portion 20 engages with the corresponding engaging hole 32 at one end of the second engaging portion 30, and the other engaging end 22 of the first engaging portion 20 engages with the corresponding engaging hole 32 at the other end of the second engaging portion 30, thus fixing the first engaging portion 20 and the second engaging portion 30 onto the semi-ring mutual inductance unit 10. Specifically, the first engaging portion 20 has a first intermediate portion 21 that matches the side surface of the semi-ring mutual inductance unit 10. Preferably, the first intermediate portion 21 is a fan-shaped piece. One end of the first intermediate portion 21 has a snap-fit ​​end 22 bent toward the opposite side of the semi-ring mutual inductance unit 10. The other end of the first intermediate portion 21 also has a snap-fit ​​end 22 bent toward the opposite side of the semi-ring mutual inductance unit 10. The second snap-fit ​​portion 30 has a second intermediate portion 31 that matches the other side of the semi-ring mutual inductance unit 10. Preferably, the second intermediate portion 31 is fan-shaped. One end of the second intermediate portion 31 has a snap-fit ​​hole 32 bent toward the opposite side of the semi-ring mutual inductance unit 10. The other end of the second intermediate portion 31 also has a snap-fit ​​hole 32 bent toward the opposite side of the semi-ring mutual inductance unit 10. A connecting portion 40 is provided on the second snap-fit ​​portion 30. The connecting portion 40 protrudes from the second snap-fit ​​portion 30. The connecting portion 40 has a slot 41 with an opening facing the outside of the semi-ring mutual inductance unit 10. The slot 41 is fan-shaped. The rigid coil 60 can be snapped into the slot 41.

[0019] In another embodiment, the buckle includes a first clamp and a second clamp, one end of the first clamp and the second clamp are hinged together, and the other end is connected by a bolt and nut. The second clamp has a connecting part 40, and the connecting part 40 is provided with a detachable rigid coil 60. The axis of the rigid coil 60 is parallel to the axis of the inner hole formed by the combination of the two semi-ring mutual inductance units 10.

[0020] In one embodiment, the connecting part 40 is provided with a connecting hole, the rigid coil 60 is provided with a threaded hole, and a screw passes through the connecting hole on the connecting part 40 and is threadedly connected to the rigid coil 60.

[0021] In use, the buckle is installed on the semi-ring current transformer unit 10, and then the rigid coil 60 is installed on the slot 41 of the connecting part 40, and the axis of the rigid coil 60 is parallel to the inner hole formed by the combination of the two semi-ring current transformer units 10. Then the wire 50 is passed through the rigid coil 60 and fixed to the ring current transformer, and the circuit data is measured.

[0022] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A snap-fit ​​positioning device for a toroidal current transformer, comprising two semi-toroidal transformer units, characterized in that: A detachable buckle is fitted onto any one of the semi-ring mutual inductance units. The buckle has a connecting part, and a detachable rigid coil is provided on the connecting part. The axis of the rigid coil is parallel to the axis of the inner hole formed by the combination of the two semi-ring mutual inductance units.

2. The snap-fit ​​positioning device for a toroidal current transformer according to claim 1, characterized in that: The buckle includes a first snap-fit ​​part and a second snap-fit ​​part. The first snap-fit ​​part has snap-fit ​​ends at both ends, and the second snap-fit ​​part has snap-fit ​​holes at both ends. The first snap-fit ​​part is located on one side of the semi-ring mutual inductance unit, and the second snap-fit ​​part is located on the other side of the semi-ring mutual inductance unit. The snap-fit ​​end of one end of the first snap-fit ​​part engages with the snap-fit ​​hole of the corresponding end of the second snap-fit ​​part, and the snap-fit ​​end of the other end of the first snap-fit ​​part engages with the snap-fit ​​hole of the corresponding end of the second snap-fit ​​part, so that the first snap-fit ​​part and the second snap-fit ​​part are fixedly fitted onto the semi-ring mutual inductance unit.

3. The snap-fit ​​positioning device for a toroidal current transformer according to claim 2, characterized in that: The first snap-fit ​​portion has a first middle portion that matches the side of the semi-ring mutual inductance unit. The first middle portion is fan-shaped. One end of the first middle portion has a snap-fit ​​end that bends toward the opposite side of the semi-ring mutual inductance unit. The other end of the first middle portion also has a snap-fit ​​end that bends toward the opposite side of the semi-ring mutual inductance unit.

4. The snap-fit ​​positioning device for a toroidal current transformer according to claim 2, characterized in that: The second snap-fit ​​portion has a second middle portion that matches the side of the semi-ring mutual inductance unit. The second middle portion is fan-shaped. One end of the second middle portion has a snap-fit ​​hole that bends toward the opposite side of the semi-ring mutual inductance unit. The other end of the second middle portion also has a snap-fit ​​hole that bends toward the opposite side of the semi-ring mutual inductance unit.

5. The snap-fit ​​positioning device for a toroidal current transformer according to claim 1, characterized in that: The buckle includes a first clamp and a second clamp, with one end of the first clamp and the second clamp hinged together and the other end connected by bolts and nuts.

6. A snap-fit ​​positioning device for a toroidal current transformer according to any one of claims 2-4, characterized in that: The connecting part protrudes from the second snap-fit ​​part, and the connecting part has a slot with an opening facing the outside of the second snap-fit ​​part. The slot is fan-shaped, and the rigid coil can be snapped into the slot.

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