Current transformer

Abstract

The utility model discloses a current transformer which comprises a transformer body and a connecting block arranged on the lower side of the transformer body, a fixing shell is arranged on the upper side of the transformer body, and an insertion hole is formed in the inner side of the middle of the transformer body. Two connecting ports are formed in the middle position of the front side of the connecting block, threaded grooves are formed in the inner positions of the front side and the rear side of the mutual inductor body respectively, clamping rings are connected to the outer sides of the threaded grooves, and it can be ensured that a wire is accurately clamped in the middle of a jack through the structures on the fixing rings and the clamping rings; therefore, measurement errors caused by position changes of the electric wire are reduced, the precision of current measurement is improved, displacement of the electric wire caused by vibration or external force in the operation process is prevented, the accuracy of current measurement is improved, the stability of the whole electric power system is enhanced, and the service life of the electric power system is prolonged. And system faults or potential safety hazards caused by wire displacement are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field related to current transformers, and specifically relates to a current transformer. Background Art

[0002] A current transformer is a device used to measure current in an AC circuit. Its working principle is based on the law of electromagnetic induction. When the primary current flows through the center jack of the transformer, a secondary current proportional to the primary current is generated on the secondary winding of the transformer. This secondary current can be measured and converted into a reading of the primary current, thus achieving non-contact measurement of current.

[0003] However, when an existing current transformer is in use, there is no internal structure for fixing the position of the wires. When the wires are displaced due to vibration or external force during operation, the accuracy of current measurement and the stability of the system will be affected. Utility Model Content

[0004] The purpose of the utility model is to provide a current transformer to solve the problem that the structure proposed in the above background technology lacks a fixed wire position inside. When the wire is displaced due to vibration or external force during operation, the accuracy of current measurement and the stability of the system will be affected.

[0005] To achieve the above object, the utility model provides the following technical solution: a current transformer, comprising a transformer body and a connection block arranged at a lower side of the transformer body;

[0006] A fixing shell is arranged at the upper side of the transformer body, and a plug hole is arranged at the middle inner side of the transformer body;

[0007] Two connection ports are respectively arranged at the middle position of the front side of the connection block;

[0008] The front and rear sides of the transformer body are respectively provided with thread grooves, the outer side of the thread grooves is connected with a clamping ring, and the outer side of the clamping ring is provided with a fixing ring;

[0009] The upper and lower sides of the clamping ring are respectively provided with fixing columns, the outer sides of the fixing columns are connected with a clamping block, and the connecting position of the fixing columns and the clamping block is provided with a connecting bolt;

[0010] The fixing ring is provided with fixing columns at the upper and lower sides thereof, respectively; the fixing columns are connected with fixing blocks at the outer sides thereof; and mounting bolts are provided at the connecting positions of the fixing blocks and the fixing columns.

[0011] Preferably, the clamping ring is connected to the thread groove by a threaded connection, and the clamping ring can be rotated on the transformer body through the thread groove.

[0012] Preferably, the fixing ring is connected to the transformer body by a threaded connection, and the fixing ring can rotate on the transformer body.

[0013] Preferably, the two fixing columns and the connecting column are connected to a fixing ring and a clamping ring respectively through an integrated connection manner, and the connecting block and the fixing shell are connected to the transformer body respectively through an integrated connection manner.

[0014] Preferably, the clamping block is connected to the two connecting columns by means of a sleeve connection, and the connecting bolt is connected to the connecting columns by means of a threaded connection.

[0015] Preferably, the fixing block is connected to the fixing column by a sleeve connection, and the mounting bolt is connected to the fixing column by a threaded connection.

[0016] Preferably, a bottom plate is provided at the lower side of the connecting block, and screw holes are provided at the middle inner positions of the left and right sides of the bottom plate.

[0017] Preferably, a rotating insert is provided at the connection position between the base plate and the connecting block, and a plurality of groups of latch teeth are provided on the outer side of the rotating insert. The connecting block is connected to the rotating insert by a nested connection, and the connecting block can rotate with resistance on the base plate through the rotating insert and the plurality of groups of latch teeth.

[0018] Compared with the prior art, the utility model provides a current transformer with the following beneficial effects:

[0019] 1. In a current transformer, the following benefits can be achieved by setting a fixing ring, a connecting column, a connecting bolt, a clamping block, a clamping ring, a fixing column, a fixing block, a mounting bolt, and a threaded groove:

[0020] Improve measurement accuracy:

[0021] The structures on the fixing ring and the clamping ring can ensure that the wire is accurately clamped in the middle of the jack, thereby reducing the measurement error caused by the change of the wire position and improving the accuracy of current measurement.

[0022] Enhanced system stability:

[0023] Preventing the displacement of wires due to vibration or external force during operation not only improves the accuracy of current measurement, but also enhances the stability of the entire power system and avoids system failures or safety hazards caused by wire displacement.

[0024] Simplified installation and maintenance:

[0025] Operators can adjust the clamping force and position of the wires by simply turning the fixing ring and the clamping ring. This design makes the installation and maintenance process easier and reduces operation time and labor costs.

[0026] Adaptability and flexibility:

[0027] The direction of the jack can be adjusted by rotating the connection block, which makes it easy to connect the transformer to the wires in different installation environments, thereby improving the adaptability and flexibility of the equipment.

[0028] Security Improvements:

[0029] The stable wire fixing method reduces the risk of poor electrical contact or short circuit caused by wire displacement, thereby improving the safety performance of the entire system.

[0030] Reduced maintenance requirements:

[0031] Secure clamping of wires reduces the frequency of maintenance and adjustments, lowering long-term operating costs while also reducing system downtime due to maintenance operations.

[0032] In summary, this design of current transformer provides multi-faceted optimization for the operation of the power system by improving measurement accuracy, enhancing system stability, simplifying operating procedures, increasing adaptability and flexibility, improving safety and reducing maintenance requirements. It is an indispensable and important part of the modern power monitoring and control field.

[0033] 2. In a current transformer, the following benefits can be achieved through the arrangement of the bottom plate, the rotating insert ring and the connecting block:

[0034] Improve installation efficiency:

[0035] By rotating the embedded ring to adjust the angle of the transformer body, it can be ensured that the direction of the jack is most suitable for the insertion path of the wire, avoiding installation difficulties caused by angle mismatch and greatly improving installation efficiency.

[0036] Enhanced operational flexibility:

[0037] The adjustability of the transformer's main body direction enables operators to flexibly adjust the equipment's installation angle according to actual site conditions, adapt to various installation environments and conditions, and enhance operational flexibility.

[0038] Reduce physical labor intensity:

[0039] There is no need to manually twist the wires or transformers. The direction of the socket can be adjusted by simply turning the embedded ring, which reduces the physical labor intensity of the operators and reduces the safety risks in operation.

[0040] Reduce the risk of wire damage:

[0041] The wires can be inserted into the jack along the most natural path, reducing wire twisting or damage caused by improper angles, protecting the structural integrity of the wires and extending the service life of the wires.

[0042] Optimize space utilization:

[0043] In environments with limited space or complex wiring layout, the ability to flexibly adjust the direction of the transformer body can better utilize limited space resources and avoid unnecessary interference between wires and surrounding equipment or structures.

[0044] Simplify subsequent maintenance work:

[0045] The optimization of the wire insertion direction makes subsequent inspection and maintenance work more convenient, reduces the maintenance difficulty caused by improper wire positioning, and reduces maintenance costs.

[0046] In summary, the design of adjusting the direction of the transformer body by rotating the embedded ring not only improves installation efficiency and operational flexibility, but also reduces physical labor intensity, reduces the risk of wire damage, optimizes space utilization, simplifies subsequent maintenance work, and provides operators with a more efficient, safe and convenient installation and operation experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural schematic diagram of the utility model.

[0048] Figure 2 It is a schematic diagram of the structure after the fixing block and the clamping block in the utility model are disassembled.

[0049] Figure 3 It is a schematic diagram of the structure after the clamping ring in the utility model is removed from the thread groove.

[0050] Figure 4 It is a schematic diagram of the structure of the utility model after the bottom plate and the connecting block are separated.

[0051] In the figure:

[0052] 1. Transformer body; 2. Fixed shell; 3. Connection block; 4. Bottom plate; 5. Screw hole; 6. Connection port; 7. Socket; 8. Fixed ring; 9. Connection column; 10. Connection bolt; 11. Clamp block; 12. Clamp ring; 13. Fixed column; 14. Fixed block; 15. Mounting bolt; 16. Threaded groove; 17. Rotating embedded ring. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0054] The utility model provides Figure 1-4 A current transformer shown includes a transformer body 1 and a connection block 3 arranged at the lower side of the transformer body 1;

[0055] A fixing shell 2 is provided at the upper side of the transformer body 1, and a plug hole 7 is provided at the middle inner side of the transformer body 1;

[0056] Two connection ports 6 are respectively provided at the middle position of the front side of the connection block 3;

[0057] The transformer body 1 has thread grooves 16 formed inside the front and rear sides, and a clamping ring 12 is connected to the outer side of the thread groove 16. A fixing ring 8 is provided outside the clamping ring 12.

[0058] The upper and lower sides of the clamp ring 12 are respectively provided with fixing columns 13, the outer side of the fixing columns 13 is connected with a clamping block 11, and the connecting position of the fixing columns 13 and the clamping block 11 is provided with a connecting bolt 10;

[0059] The fixing ring 8 is provided with fixing columns 13 at the upper and lower sides thereof, respectively. A fixing block 14 is connected to the outer side of the fixing column 13 . A mounting bolt 15 is provided at the connection position between the fixing block 14 and the fixing column 13 .

[0060] In this embodiment, the use principle

[0061] A current transformer is a device used to measure current in an AC circuit. Its working principle is based on the law of electromagnetic induction. When the primary current flows through the center jack of the transformer, a secondary current proportional to the primary current is generated on the secondary winding of the transformer. This secondary current can be measured and converted into a reading of the primary current, thus achieving non-contact measurement of current.

[0062] How to use

[0063] Installation preparation:

[0064] First, fix the bottom plate 4 to the device to be installed or the wall by means of bolts to ensure that the bottom plate is stable.

[0065] Confirm that the screw holes 5 on the bottom plate 4 are aligned with the fixing positions, and fix the bottom plate 4 with bolts.

[0066] To adjust the jack orientation:

[0067] By rotating the embedded ring 17 , the angle of the connecting block 3 and the entire transformer body 1 can be adjusted to change the direction of the insertion hole 7 .

[0068] This step is to facilitate the subsequent insertion of wires and ensure that the direction of the jack is suitable for operation.

[0069] Fixing the wires:

[0070] Pass the wires through the socket 7 in the middle of the transformer body 1.

[0071] The fixing ring 8 and the clamping ring 12 are rotated so that the clamping block 11 and the fixing block 14 clamp the electric wires respectively, and the connecting bolts 10 and the mounting bolts 15 are used to tighten them.

[0072] This step ensures that the wires will not be displaced due to vibration or external force during operation, ensuring the accuracy of current measurement and the stability of the system.

[0073] Inspection and testing:

[0074] After securing the wires, check that all connection points are secure and that nothing is loose.

[0075] Perform a current test to confirm that the transformer is working properly and the measured value is accurate.

[0076] Through the above steps, the installation of the current transformer and the fixing of the wires can be completed, ensuring that it can stably and accurately measure current in practical applications.

[0077] like Figure 1-3 As shown, the clamping ring 12 is connected to the thread groove 16 by a threaded connection, and the clamping ring 12 can rotate on the transformer body 1 through the thread groove 16, the fixing ring 8 is connected to the transformer body 1 by a threaded connection, and the fixing ring 8 can rotate on the transformer body 1, the two fixing columns 13 and the connecting column 9 are respectively connected to the fixing ring 8 and the clamping ring 12 by an integrated connection, the connecting block 3 and the fixing shell 2 are respectively connected to the transformer body 1 by an integrated connection, the clamping block 11 is connected to the two connecting columns 9 by a sleeve connection, the connecting bolt 10 is connected to the connecting column 9 by a threaded connection, the fixing block 14 is connected to the fixing column 13 by a sleeve connection, and the mounting bolt 15 is connected to the fixing column 13 by a threaded connection.

[0078] Preferably, after the operator passes the wire through the jack 7 on the middle inner side of the transformer body 1, he or she rotates the fixing ring 8 and the clamping ring 12 on the transformer body 1 respectively, and clamps the wire passing through the middle jack 7 of the transformer body 1 in the middle of the jack 7 through the clamping block 11 connected to the two connecting columns 9 and the fixing block 14 connected to the two fixing columns 13, thereby completing the fixation of the wire, preventing the wire from being displaced due to vibration or external force during operation, thereby ensuring the accuracy of current measurement and the stability of the system.

[0079] like Figure 1-4 As shown, a bottom plate 4 is provided at the lower side of the connecting block 3, screw holes 5 are provided at the middle inner positions on the left and right sides of the bottom plate 4, a rotating insert ring 17 is provided at the connecting position between the bottom plate 4 and the connecting block 3, a plurality of groups of latch teeth are provided on the outer side of the rotating insert ring 17, the connecting block 3 is connected to the rotating insert ring 17 by a nested connection, and the connecting block 3 can be rotated with resistance on the bottom plate 4 through the rotating insert ring 17 and the plurality of groups of latch teeth.

[0080] Preferably, after the operator uses the bolt to penetrate the screw hole 5 on the base plate 4, the base plate 4 is fixed to the device to be installed or the wall, and then the transformer body 1 can be rotated by rotating the ring 17 to change the direction of the socket 7 so as to more conveniently complete the insertion of the wire.

[0081] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A current transformer, comprising a transformer body (1) and a connection block (3) arranged at a lower side of the transformer body (1); A fixing shell (2) is provided at the upper side of the transformer body (1), and a plug hole (7) is provided at the middle inner side of the transformer body (1); Two connection ports (6) are respectively arranged at the middle position of the front side of the connection block (3); Features: The transformer body (1) is provided with thread grooves (16) at the inner positions of the front and rear sides respectively, the outer position of the thread groove (16) is connected with a clamping ring (12), and the outer position of the clamping ring (12) is provided with a fixing ring (8); The clamping ring (12) is provided with fixing columns (13) at upper and lower sides thereof, respectively; a clamping block (11) is connected to the outer side of the fixing column (13); and a connecting bolt (10) is provided at the connection position between the fixing column (13) and the clamping block (11); The fixing ring (8) is provided with fixing columns (13) at the upper and lower sides thereof, respectively; a fixing block (14) is connected to the outer side of the fixing column (13); and a mounting bolt (15) is provided at the connection position between the fixing block (14) and the fixing column (13).

2. A current transformer according to claim 1, characterized in that: The clamping ring (12) is connected to the thread groove (16) by means of a threaded connection, and the clamping ring (12) can be rotated on the transformer body (1) through the thread groove (16).

3. A current transformer according to claim 2, characterized in that: The fixing ring (8) is connected to the transformer body (1) by means of a threaded connection, and the fixing ring (8) can rotate on the transformer body (1).

4. A current transformer according to claim 3, characterized in that: The two fixing columns (13) and the connecting column (9) are respectively connected to the fixing ring (8) and the clamping ring (12) by means of an integrated connection, and the connecting block (3) and the fixing shell (2) are respectively connected to the transformer body (1) by means of an integrated connection.

5. A current transformer according to claim 4, characterized in that: The clamping block (11) is connected to the two connecting columns (9) by means of a sleeve connection, and the connecting bolt (10) is connected to the connecting column (9) by means of a threaded connection.

6. A current transformer according to claim 5, characterized in that: The fixing block (14) is connected to the fixing column (13) by means of a sleeve connection, and the mounting bolt (15) is connected to the fixing column (13) by means of a threaded connection.

7. A current transformer according to claim 1, characterized in that: A bottom plate (4) is provided at the lower side of the connection block (3), and screw holes (5) are provided at the middle inner positions of the left and right sides of the bottom plate (4).

8. A current transformer according to claim 7, characterized in that: A rotating insert ring (17) is provided at the connection position between the bottom plate (4) and the connection block (3), and a plurality of groups of latching teeth are provided on the outer side of the rotating insert ring (17). The connection block (3) is connected to the rotating insert ring (17) by a nested connection, and the connection block (3) can rotate with resistance on the bottom plate (4) through the rotating insert ring (17) and the plurality of groups of latching teeth.

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