Current transformer capable of preventing electromagnetic field interference

Abstract

The utility model relates to the technical field of current transformers, and discloses a current transformer capable of preventing electromagnetic field interference, which comprises a current transformer body, a protection mechanism is arranged outside the current transformer body, a dismounting mechanism is arranged outside the protection mechanism, and the protection mechanism comprises a protection shell. A first sliding groove and a second sliding groove are formed in the inner side and the outer side of the protective shell correspondingly, a first sliding block is slidably connected to the inner side of the first sliding groove, a second sliding block is slidably connected to the inner side of the second sliding groove, and placing blocks are fixedly connected to one end of the first sliding block and one end of the second sliding block correspondingly. One end of the first sliding block and one end of the second sliding block are fixedly connected with threaded rods, the outer portions of the threaded rods are in threaded connection with threaded blocks, and one end of the placing block is hinged to a fixing cover. And the risk of short circuit is avoided.

Description

Technical Field

[0001] This utility model relates to the field of current transformer technology, specifically a current transformer that can prevent electromagnetic interference. Background Technology

[0002] A current transformer is an instrument that measures a large primary current by converting it into a small secondary current based on the principle of electromagnetic induction. During operation, the secondary circuit of a current transformer is always closed, resulting in very low impedance between the measuring instrument and the series coil of the protection circuit. However, the current transformer generates electromagnetic fields due to the electrical current. If it is subjected to external electromagnetic interference, it may stop working. Therefore, it is necessary to prevent external electromagnetic interference when using a current transformer.

[0003] Chinese Patent Publication No. CN222126197U discloses a "Current Transformer for Easy Disassembly and Installation," which includes a base and a fixed base. A sleeve is fixedly installed on the base, and a current transformer body is inserted into the sleeve. A limiting frame is fitted on the outside of the current transformer body and inserted into the sleeve. Sliding grooves are provided on both sides of the base near the sleeve, and sliding plates are slidably connected to both grooves. A locking plate is fixedly installed at the top of each sliding plate, and multiple springs are fixedly installed on the side of each sliding plate closest to each other. This current transformer for easy disassembly and installation allows for quick assembly and disassembly between the base and the fixed base, thereby improving assembly and disassembly efficiency and avoiding the problem of bolt corrosion leading to difficulty in disassembly after long-term use, which is common with traditional bolted connections. Furthermore, the current transformer body and the base can be quickly separated, avoiding the need to replace both the base and the current transformer body together in case of failure, reducing resource waste.

[0004] However, the above structure lacks a corresponding limiting mechanism when the conductor passes through the groove of the current transformer body, making it easy for the conductor to come into direct contact with the current transformer body, which can easily lead to electromagnetic interference or even a short circuit. Utility Model Content

[0005] The purpose of this invention is to provide a current transformer that can prevent electromagnetic interference, in order to solve the problem in the background art where when the conductor passes through the groove of the current transformer, it is easy to come into direct contact with the current transformer, which can easily lead to electromagnetic interference or even short circuit.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A current transformer that can prevent electromagnetic interference includes a current transformer body, a protective mechanism is provided on the outside of the current transformer body, and a disassembly mechanism is provided on the outside of the protective mechanism.

[0008] The protective mechanism includes a protective shell, with a first sliding groove and a second sliding groove respectively opened on the inner and outer sides of the protective shell. A first sliding block is slidably connected to the inner side of the first sliding groove, and a second sliding block is slidably connected to the inner side of the second sliding groove. A placement block is fixedly connected to one end of each of the first and second sliding blocks, and a threaded rod is fixedly connected to one end of each of the first and second sliding blocks. A threaded block is threadedly connected to the outer side of the threaded rod. A fixing cover is hinged to one end of the placement block, and a locking block is fixedly connected to one end of the fixing cover.

[0009] The disassembly mechanism includes a connecting plate, a slot is provided on the outside of the connecting plate, a connecting block is engaged on the inside of the slot, a through hole is provided on the outside of the connecting block, a sliding groove is provided on the outside of the connecting plate, a fixing block is slidably connected to the inside of the sliding groove, and a positioning block is fixedly connected to one end of the fixing block.

[0010] Preferably, the inner wall of the protective shell is fitted to the outer wall of the current transformer body, and the placement block is configured to be concave.

[0011] Preferably, one end of the protective shell is provided with an arc-shaped groove, and one end of the arc-shaped groove communicates with one end of the first sliding groove and the second sliding groove.

[0012] Preferably, one end of the threaded rod passes through the protective shell and extends to the outside of the protective shell.

[0013] Preferably, there are two card blocks, and the two card blocks are symmetrically distributed.

[0014] Preferably, multiple connecting blocks are provided, and one end of each connecting block is fixedly connected to one end of the protective shell.

[0015] Preferably, multiple positioning blocks are provided, and the multiple positioning blocks are arranged in a circular array.

[0016] Compared with existing technologies, the advantages of this utility model of a current transformer that can prevent electromagnetic interference are:

[0017] First, by using a ferrous protective shell, which is then inserted so that its inner wall fits snugly against the outer wall of the current transformer body, the protective shell effectively protects the current transformer. The ferrous shell also absorbs and reflects external electromagnetic interference signals, significantly reducing the impact of this interference on the internal circuitry of the current transformer. Then, by passing the wire through the grooves in the placement blocks on the outer and inner sides of the protective shell, and finally closing the fixing cover, the locking block at one end of the fixing cover engages with the placement block, thus securing the wire within the placement block. The placement block is made of silicon steel sheet, thus preventing… The conductor directly contacts the current transformer body, thus avoiding the risk of short circuit. Then, through the setting of the first and second sliding blocks, the placement block can be moved to slide within the first and second sliding grooves. The installation position of the conductor can be adjusted as needed. After the position is adjusted, due to the setting of the arc groove, the threaded rod slides simultaneously with the first and second sliding blocks. Then, by rotating the threaded block outside the threaded rod until one end of the threaded block is in contact with the protective shell, the first and second sliding blocks are fixed, and the conductor is fixed, thereby achieving the best measurement effect and anti-interference performance.

[0018] Secondly, after connecting the protective shell to the current transformer body, the connecting block on one end of the protective shell is inserted into the slot on the outside of the connecting plate, so that the connecting plate is connected to one end of the protective shell, thereby protecting the entire current transformer body inside the protective shell. Then, by pushing the fixing block in the sliding groove until the fixing block passes through the through hole of the connecting block, the positioning block is engaged with the other end of the sliding groove, thereby improving the stability of the connection between the protective shell and the connecting plate. The engaging method also facilitates the subsequent disassembly of the protective shell. Attached Figure Description

[0019] Figure 1 This is a three-dimensional view of the overall structure of the current transformer of this utility model that can prevent electromagnetic interference.

[0020] Figure 2 This is a perspective view of the back of the current transformer of this utility model that can prevent electromagnetic interference.

[0021] Figure 3 This is a cross-sectional view of the protective shell.

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 This is a cross-sectional view of the disassembly mechanism.

[0024] The components are: 1. Current transformer body; 2. Protective mechanism; 3. Disassembly mechanism; 21. Protective shell; 22. First sliding block; 23. Second sliding block; 24. Placement block; 25. Threaded rod; 26. Threaded block; 27. Fixing cover; 28. Locking block; 31. Connecting plate; 32. Connecting block; 34. Fixing block; 35. Positioning block. Detailed Implementation

[0025] The specific embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0026] Example 1

[0027] Please see Figure 1-5 A current transformer that can prevent electromagnetic interference includes a current transformer body 1, a protective mechanism 2 is provided on the outside of the current transformer body 1, and a disassembly mechanism 3 is provided on the outside of the protective mechanism 2.

[0028] The protective mechanism 2 includes a protective shell 21. The inner and outer sides of the protective shell 21 are respectively provided with a first sliding groove and a second sliding groove. A first sliding block 22 is slidably connected to the inner side of the first sliding groove, and a second sliding block 23 is slidably connected to the inner side of the second sliding groove. A placement block 24 is fixedly connected to one end of both the first sliding block 22 and the second sliding block 23. A threaded rod 25 is fixedly connected to one end of both the first sliding block 22 and the second sliding block 23. A threaded block 26 is threadedly connected to the outside of the threaded rod 25. A fixing cover 27 is hinged to one end of the placement block 24, and a locking block 28 is fixedly connected to one end of the fixing cover 27.

[0029] The inner wall of the protective shell 21 is fitted to the outer wall of the current transformer body 1, and the placement block 24 is set to be concave.

[0030] One end of the protective shell 21 is provided with an arc-shaped groove, and one end of the arc-shaped groove is connected to one end of the first sliding groove and the second sliding groove.

[0031] One end of the threaded rod 25 passes through the protective shell 21 and extends to the outside of the protective shell 21.

[0032] There are two card blocks 28, and the two card blocks 28 are set to be symmetrically distributed.

[0033] Through the above technical solution, the protective shell 21 is made of iron. The protective shell 21 is inserted so that its inner wall fits against the outer wall of the current transformer body 1, thus protecting the current transformer body 1. The iron protective shell 21 can absorb and reflect external electromagnetic interference signals, significantly reducing the impact of these interferences on the internal circuitry of the current transformer body 1. Then, by passing the wire through the grooves in the placement block 24 on the outer and inner sides of the protective shell 21, and then closing the fixing cover 27, the locking block 28 at one end of the fixing cover 27 engages with the placement block 24, thereby fixing the wire inside the placement block 24. The placement block 24 is made of silicon steel sheet. This avoids direct contact between the conductor and the current transformer body 1, thus preventing the risk of short circuit. Then, the first sliding block 22 and the second sliding block 23 allow the placement block 24 to slide within the first and second sliding grooves, thereby adjusting the installation position of the conductor as needed. After the position is adjusted, the threaded rod 25 slides simultaneously with the first sliding block 22 and the second sliding block 23 due to the arc groove. The threaded block 26 outside the threaded rod 25 can be rotated until one end of the threaded block 26 is in contact with the protective shell 21, thereby fixing the first sliding block 22 and the second sliding block 23 and thus fixing the conductor, achieving the best measurement effect and anti-interference performance.

[0034] Example 2

[0035] Please see Figure 1-5 Furthermore, based on Embodiment 1, the disassembly mechanism 3 includes a connecting plate 31, a slot is provided on the outside of the connecting plate 31, a connecting block 32 is engaged on the inside of the slot, a through hole is provided on the outside of the connecting block 32, a sliding groove is provided on the outside of the connecting plate 31, a fixing block 34 is slidably connected to the inside of the sliding groove, and a positioning block 35 is fixedly connected to one end of the fixing block 34.

[0036] Multiple connecting blocks 32 are provided, and one end of each connecting block 32 is fixedly connected to one end of the protective shell 21.

[0037] Multiple positioning blocks 35 are provided, and the multiple positioning blocks 35 are arranged in a circular array.

[0038] Through the above technical solution, after connecting the protective shell 21 to the current transformer body 1, the connecting block 32, which is located on the outside of the connecting plate 31, is inserted into one end of the protective shell 21, so that the connecting plate 31 is connected to one end of the protective shell 21, thereby protecting the current transformer body 1 inside the protective shell 21. Then, by pushing the fixing block 34 in the sliding groove until the fixing block 34 passes through the through hole of the connecting block 32, the positioning block 35 is engaged with the other end of the sliding groove, thereby improving the stability of the connection between the protective shell 21 and the connecting plate 31. The engagement method also facilitates the subsequent disassembly of the protective shell 21.

[0039] Although specific embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made to these specific embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A current transformer which is immune to electromagnetic field interference, comprising a current transformer body (1), characterized in that: The current transformer body (1) is provided with a protective mechanism (2) on the outside, and the protective mechanism (2) is provided with a disassembly mechanism (3) on the outside; The protective mechanism (2) includes a protective shell (21). The inner and outer sides of the protective shell (21) are respectively provided with a first sliding groove and a second sliding groove. The inner side of the first sliding groove is slidably connected to a first sliding block (22), and the inner side of the second sliding groove is slidably connected to a second sliding block (23). One end of the first sliding block (22) and the second sliding block (23) is fixedly connected to a placement block (24). One end of the first sliding block (22) and the second sliding block (23) is fixedly connected to a threaded rod (25). The threaded rod (25) is threadedly connected to a threaded block (26). One end of the placement block (24) is hinged to a fixing cover (27), and one end of the fixing cover (27) is fixedly connected to a locking block (28). The disassembly mechanism (3) includes a connecting plate (31), the outside of which is provided with a slot, and a connecting block (32) is engaged inside the slot. The outside of the connecting block (32) is provided with a through hole, and the outside of the connecting plate (31) is provided with a sliding groove. A fixing block (34) is slidably connected inside the sliding groove, and a positioning block (35) is fixedly connected to one end of the fixing block (34).

2. The electromagnetic interference protected current transformer of claim 1, wherein: The inner wall of the protective shell (21) is attached to the outer wall of the current transformer body (1), and the placement block (24) is set to be concave.

3. The electromagnetic interference protected current transformer of claim 1, wherein: One end of the protective shell (21) is provided with an arc-shaped groove, and one end of the arc-shaped groove is connected to one end of the first sliding groove and the second sliding groove.

4. The electromagnetic interference protected current transformer of claim 1, wherein: One end of the threaded rod (25) penetrates through the protective shell (21) and extends to the outside of the protective shell (21).

5. The electromagnetic interference protected current transformer of claim 1, wherein: There are two card blocks (28), and the two card blocks (28) are symmetrically distributed.

6. The electromagnetic interference protected current transformer of claim 1, wherein: Multiple connecting blocks (32) are provided, and one end of each connecting block (32) is fixedly connected to one end of the protective shell (21).

7. The electromagnetic interference protected current transformer of claim 1, wherein: Multiple positioning blocks (35) are provided, and the multiple positioning blocks (35) are arranged in a ring array.

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