A new type of current transformer for realizing current ratio

Abstract

The present invention belongs to the field of current transformers, and specifically is a novel current transformer for realizing current ratio, comprising a transformer body and a fixing clamp; the fixing clamp is arranged inside the transformer body, and a connecting mechanism is arranged between the transformer body and the fixing clamp; the connecting mechanism comprises a fixing block, a connecting rod, a limiting cavity, a limiting spring, a limiting block, a top block and a pushing component, the fixing block is fixedly connected to the inner wall of the transformer body, the connecting rod is fixedly connected to the fixing block, and the fixing block passes through the fixing clamp, the limiting cavity is arranged inside the connecting rod, the limiting spring is arranged inside the limiting cavity, the limiting block is sleeved inside the limiting cavity, the top block is arranged on the side of the limiting block away from the limiting spring, and the pushing component is arranged between the top block and the fixing clamp; the connecting mechanism is used to facilitate the installation and replacement of the fixing clamp, thereby facilitating the fixing of the wire.

Description

Technical Field

[0001] The invention relates to the field of current transformers, in particular to a novel current transformer for realizing current ratio. Background Art

[0002] A current transformer is a device used to convert large current into small current. By using current transformers, standardization and miniaturization of measuring instruments, protection equipment and automatic control equipment can be achieved.

[0003] Most existing current transformers meet the requirements of maximum transformation ratio and intermediate transformation ratio by setting up two sets of windings. At the same time, the number of secondary winding leads and the number of terminals are reduced by connecting the primary conductors in series, thus meeting the requirements of achieving current ratio.

[0004] Most of the existing current transformers are not convenient for installing the wire clamps, and it is inconvenient to install and fix the wires, which leads to poor or unstable working conditions of the current transformer. Therefore, a new current transformer for realizing current ratio is proposed to solve the above problems. Summary of the invention

[0005] In order to make up for the deficiency of the prior art, the problem that most of the existing current transformers are inconvenient to install the conductor clamps, the present invention proposes a new type of current transformer for realizing the current ratio.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a new type of current transformer for realizing current ratio described in the present invention comprises a transformer body and a fixing clamp; a fixing clamp is arranged inside the transformer body, and a connecting mechanism is arranged between the transformer body and the fixing clamp; the connecting mechanism comprises a fixing block, a connecting rod, a limiting cavity, a limiting spring, a limiting block, a top block and a pushing assembly, the fixing block is fixedly connected to the inner wall of the transformer body, the connecting rod is fixedly connected to the fixing block, and the fixing block passes through the fixing clamp, the limiting cavity is opened inside the connecting rod, the limiting spring is arranged inside the limiting cavity, the limiting block is sleeved inside the limiting cavity, the top block is arranged on the side of the limiting block away from the limiting spring, the pushing assembly is arranged between the top block and the fixing clamp, and the connecting mechanism is used to facilitate the installation and replacement of the fixing clamp, thereby facilitating the fixing of the wire.

[0007] Preferably, one end of the limit spring close to the limit block is fixedly connected to the limit block, and the end of the limit spring away from the limit block is fixedly connected to the inside of the limit cavity, so that the limit block is automatically reset through the restoring force of the limit spring, and the limit block is engaged with the fixing clamp.

[0008] Preferably, a slope is provided on one side of the limit block close to the top block, and the limit block abuts against the top block, so that the limit block moves toward the inside of the limit cavity when squeezed by the slope provided on one side of the limit block.

[0009] Preferably, the pushing assembly includes a moving block, a moving groove, a guide rail and a return spring, the moving block is fixedly connected to one end of the top block close to the fixed clamp, and the moving block is slidably connected to the inside of the moving groove, the moving groove is opened on the fixed clamp, the guide rail is fixedly connected to the inside of the moving groove, and the guide rail passes through the moving block, the return spring is wrapped around the outside of the guide rail, and the pushing assembly facilitates the release of the limiting effect of the limiting block on the fixed clamp.

[0010] Preferably, the side of the return spring close to the moving block is fixedly connected to the moving block, and the side of the return spring away from the moving block is fixedly connected to the inside of the moving groove. The restoring force of the return spring can automatically reset the moving block and drive the top block to automatically return to its original position.

[0011] Preferably, a movable block is fixedly connected to one side of the top block away from the moving block, and the movable block is slidably connected to the inside of a movable groove. The movable groove is provided on the fixed clamp, and the movable block and the movable groove make the top block more stable and smooth when moving.

[0012] Preferably, an adapting mechanism is provided at a position near the center of the fixing clamp, and the adapting mechanism includes a connecting groove, a guide rod, a sleeve block, a compression spring and a clamping plate. The connecting groove is opened at the center position of one side of the fixing clamp, the guide rod is fixedly connected to the inside of the connecting groove, the sleeve block is sleeved on the outside of the guide rod, and two groups of sleeve blocks are provided, the compression spring is provided between the two groups of sleeve blocks, and the clamping plate is fixedly connected to the sleeve block, and the adapting mechanism enables the clamping plate to fix wires of different specifications.

[0013] Preferably, a protective pad is glued to the inner side of the splint, and the protective pad is made of rubber. The rubber protective pad enhances insulation and protects the outer side of the wire, preventing the wire from being damaged and leaking due to friction between the splint and the splint.

[0014] The present invention is beneficial in that:

[0015] 1. The present invention realizes the function of conveniently fixing and installing the fixing clip through the structural design of the connecting mechanism. The fixing clip can be connected to the transformer body by aligning the hole on the fixing clip with the connecting rod and then pushing the fixing clip toward the fixing block, which solves the problem that most existing current transformers are inconvenient to install the wire clamp, improves the efficiency of installing the fixing clip, and facilitates the fixing of the wire;

[0016] 2. The present invention realizes the function of matching wires of different specifications through the structural design of the adapter mechanism, and plays the role of clamping and fixing the wires through the restoring force of the compression spring, thereby solving the problem that most existing current transformers are not convenient for fixing wires of different specifications, and improving the adaptability of the fixing clamp to wires of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment;

[0019] Figure 2 It is a schematic diagram of a top cross-sectional structure of the first embodiment;

[0020] Figure 3 For Example 1 Figure 2 The enlarged structural diagram at A in the middle;

[0021] Figure 4 For Example 1 Figure 3 The enlarged structural diagram at B in the middle;

[0022] Figure 5 It is a schematic diagram of the structure of a partial top view of the second embodiment.

[0023] In the figure: 1. Transformer body; 21. Fixed block; 22. Connecting rod; 23. Limiting cavity; 24. Limiting spring; 25. Limiting block; 26. Top block; 27. Moving block; 28. Moving groove; 29. ​​Guide rail; 210. Reset spring; 211. Movable block; 212. Movable groove; 213. Sliding block; 214. Sliding groove; 3. Fixed clamp; 41. Connecting groove; 42. Guide rod; 43. Sleeve block; 44. Compression spring; 45. Clamp; 46. Protective pad. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Embodiment 1

[0026] See also Figure 1-4 As shown, a new type of current transformer for realizing current ratio includes a transformer body 1 and a fixing clamp 3; the fixing clamp 3 is arranged inside the transformer body 1, and a connecting mechanism is arranged between the transformer body 1 and the fixing clamp 3; the connecting mechanism includes a fixing block 21, a connecting rod 22, a limiting cavity 23, a limiting spring 24, a limiting block 25, a top block 26 and a pushing assembly, the fixing block 21 is fixedly connected to the inner wall of the transformer body 1, the connecting rod 22 is fixedly connected to the fixing block 21, and the fixing block 21 passes through the fixing clamp 3, the limiting cavity 23 is opened inside the connecting rod 22, the limiting spring 24 is arranged inside the limiting cavity 23, the limiting block 25 is sleeved inside the limiting cavity 23, the top block 26 is arranged on the side of the limiting block 25 away from the limiting spring 24, and the pushing assembly is arranged between the top block 26 and the fixing clamp 3;

[0027] During operation, when the fixing clamp 3 is to be connected to the transformer body 1, first align the hole on the fixing clamp 3 with the connecting rod 22 and then push the fixing clamp 3 toward the fixing block 21, so that the fixing clamp 3 squeezes the limit block 25. Under the action of the inclined surface on the limit block 25, the limit block 25 moves toward the inside of the limit cavity 23 when squeezed, and squeezes the limit spring 24, causing the limit spring 24 to produce elastic deformation. When the fixing clamp 3 abuts against the fixing block 21, the squeezing force of the fixing clamp 3 on the limit spring 24 disappears. At this time, the limit block 25 returns to its original position under the action of the restoring force of the limit spring 24 to limit the fixing clamp 3, thereby fixing the fixing clamp 3.

[0028] One end of the limit spring 24 close to the limit block 25 is fixedly connected to the limit block 25, and one end of the limit spring 24 away from the limit block 25 is fixedly connected inside the limit cavity 23;

[0029] During operation, the restoring force of the limit spring 24 automatically resets the limit block 25 and causes the limit block 25 to engage with the fixing clip 3 .

[0030] The limit block 25 has an inclined surface on one side close to the top block 26, and the limit block 25 abuts against the top block 26;

[0031] During operation, the inclined surface provided on one side of the limiting block 25 can cause the limiting block 25 to move toward the inside of the limiting cavity 23 when being squeezed.

[0032] The pushing assembly includes a moving block 27, a moving slot 28, a guide rail 29 and a return spring 210. The moving block 27 is fixedly connected to one end of the top block 26 close to the fixed clamp 3, and the moving block 27 is slidably connected to the inside of the moving slot 28. The moving slot 28 is opened on the fixed clamp 3, the guide rail 29 is fixedly connected to the inside of the moving slot 28, and the guide rail 29 passes through the moving block 27. The return spring 210 is wound around the outside of the guide rail 29.

[0033] During operation, when the connection between the fixing clamp 3 and the transformer body 1 is to be released, the top block 26 is first pushed, so that the top block 26 moves and drives the fixedly connected moving block 27 to move inside the moving groove 28 and squeeze the reset spring 210, so that the reset spring 210 is elastically deformed, and the top block 26 moves to abut against the limit block 25 and push the limit block 25 into the limit cavity 23, so that the limit block 25 squeezes the limit spring 24 and releases the engagement state with the fixing clamp 3. At this time, the connection between the fixing clamp 3 and the transformer body 1 is released.

[0034] The side of the return spring 210 close to the moving block 27 is fixedly connected to the moving block 27, and the side of the return spring 210 away from the moving block 27 is fixedly connected inside the moving groove 28;

[0035] During operation, the restoring force of the return spring 210 can automatically restore the moving block 27 and drive the top block 26 to automatically return to its original position.

[0036] A movable block 211 is fixedly connected to one side of the top block 26 away from the moving block 27, and the movable block 211 is slidably connected to the inside of a movable groove 212, and the movable groove 212 is provided on the fixing clamp 3;

[0037] During operation, the movable block 211 and the movable groove 212 make the top block 26 move more stably and smoothly. When the top block 26 moves, the movable block 211 fixedly connected to the top block 26 also moves synchronously inside the movable groove 212, which reduces the friction of the top block 26 when it moves, making the top block 26 move more stably and smoothly, and avoiding the top block 26 from getting stuck due to excessive friction between the fixing clamp 3.

[0038] The fixing clamp 3 is provided with an adapting mechanism near the center thereof, and the adapting mechanism comprises a connecting groove 41, a guide rod 42, a sleeve block 43, a compression spring 44 and a clamping plate 45. The connecting groove 41 is provided at the center of one side of the fixing clamp 3, the guide rod 42 is fixedly connected to the inside of the connecting groove 41, the sleeve block 43 is sleeved on the outside of the guide rod 42, and two groups of sleeve blocks 43 are provided, the compression spring 44 is provided between the two groups of sleeve blocks 43, and the clamping plate 45 is fixedly connected to the sleeve block 43;

[0039] During operation, when the wire needs to be fixed, the wire is first brought into contact with the notch between the two groups of clamps 45, and then the wire pushes the fixing clamps 3. Under the action of the thrust, the outer side of the wire squeezes the clamp 45, and under the action of the inclined surface provided on the clamp 45, the clamp 45 moves to both sides when squeezed, and drives the sleeve block 43 to move synchronously, so that the sleeve block 43 pulls the compression spring 44 arranged between the two groups of sleeve blocks 43 to produce elastic deformation, so that the wire enters the gap between the two groups of clamps 45, and then stops pushing the wire. At this time, the sleeve block 43 moves to its original position under the action of the restoring force of the compression spring 44 and drives the clamp 45 to move synchronously, so that the clamp 45 clamps and fixes the wire, thereby adapting to wires of different specifications.

[0040] A protective pad 46 is glued to the inner side of the clamping plate 45, and the protective pad 46 is made of rubber;

[0041] During operation, the rubber protective pad 46 enhances the insulation and protects the outer side of the wire, thereby preventing the wire from being damaged and leaking due to friction with the clamping plate 45 .

[0042] Embodiment 2

[0043] See also Figure 5 As shown, compared with Example 1, as another embodiment of the present invention, both ends of the limit block 25 close to the limit spring 24 are fixedly connected with sliders 213, and the slider 213 is slidably connected to the inside of the slide groove 214, and the slide groove 214 is opened at both ends inside the limit cavity 23; when working, the slider 213 slides inside the slide groove 214 as the limit block 25 moves, and the combination of the slider 213 and the slide groove 214 reduces the friction of the limit block 25 when it moves, prevents the limit block 25 from getting stuck due to excessive friction between the limit cavity 23 and the inside when it moves, and makes the limit block 25 move more smoothly.

[0044] Working principle: when the fixing clip 3 is to be connected to the transformer body 1, first align the hole on the fixing clip 3 with the connecting rod 22 and then push the fixing clip 3 toward the fixing block 21, so that the fixing clip 3 squeezes the limit block 25. Under the action of the inclined surface on the limit block 25, the limit block 25 moves toward the inside of the limit cavity 23 when squeezed, and squeezes the limit spring 24, so that the limit spring 24 produces elastic deformation. When the fixing clip 3 abuts against the fixing block 21, the squeezing force of the fixing clip 3 on the limit spring 24 disappears. At this time, the limit block 25 returns to its original position under the action of the restoring force of the limit spring 24 to limit the fixing clip 3, thereby fixing the fixing clip 3.

[0045] When the connection between the fixing clamp 3 and the transformer body 1 is to be released, the top block 26 is first pushed, so that the top block 26 moves and drives the fixedly connected movable block 27 to move inside the movable groove 28 and squeeze the return spring 210, so that the return spring 210 is elastically deformed, and the top block 26 moves to abut against the limit block 25 and push the limit block 25 into the limit cavity 23, so that the limit block 25 squeezes the limit spring 24 and releases the engagement state with the fixing clamp 3. At this time, the connection between the fixing clamp 3 and the transformer body 1 is released, and when the top block 26 is moving, the movable block 211 fixedly connected to the top block 26 also moves synchronously inside the movable groove 212, which reduces the friction of the top block 26 when it moves, makes the top block 26 more stable and smooth when it moves, and avoids the situation where the top block 26 is stuck due to excessive friction between the fixing clamp 3.

[0046] When the wire needs to be fixed, first the wire is brought into contact with the notch between the two groups of clamps 45, and then the wire pushes the fixing clamps 3. Under the action of the thrust, the outer side of the wire squeezes the clamp 45, and under the action of the inclined surface provided on the clamp 45, the clamp 45 moves to both sides when squeezed, and drives the sleeve block 43 to move synchronously, so that the sleeve block 43 pulls the compression spring 44 arranged between the two groups of sleeve blocks 43 to produce elastic deformation, so that the wire enters the gap between the two groups of clamps 45, and then stops pushing the wire. At this time, the sleeve block 43 moves to its original position under the action of the restoring force of the compression spring 44 and drives the clamp 45 to move synchronously, so that the clamp 45 clamps and fixes the wire, thereby adapting to wires of different specifications.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A new type of current transformer for realizing current ratio, characterized in that: It comprises a mutual inductor body (1) and a fixing clamp (3); the fixing clamp (3) is arranged inside the mutual inductor body (1), and a connecting mechanism is arranged between the mutual inductor body (1) and the fixing clamp (3); The connection mechanism comprises a fixed block (21), a connecting rod (22), a limiting cavity (23), a limiting spring (24), a limiting block (25), a top block (26) and a pushing assembly, wherein the fixed block (21) is fixedly connected to the inner wall of the transformer body (1), the connecting rod (22) is fixedly connected to the fixed block (21), and the fixed block (21) passes through the fixing clamp (3), the limiting cavity (23) is arranged inside the connecting rod (22), the limiting spring (24) is arranged inside the limiting cavity (23), the limiting block (25) is sleeved inside the limiting cavity (23), the top block (26) is arranged on a side of the limiting block (25) away from the limiting spring (24), and the pushing assembly is arranged between the top block (26) and the fixing clamp (3); An adapting mechanism is arranged near the center of the fixing clamp (3), and the adapting mechanism comprises a connecting groove (41), a guide rod (42), a sleeve block (43), a compression spring (44) and a clamping plate (45). The connecting groove (41) is arranged at the center of one side of the fixing clamp (3), the guide rod (42) is fixedly connected to the inside of the connecting groove (41), the sleeve block (43) is sleeved on the outside of the guide rod (42), and two groups of sleeve blocks (43) are arranged. The compression spring (44) is arranged between the two groups of sleeve blocks (43), and the clamping plate (45) is fixedly connected to the sleeve block (43).

2. A new type of current transformer for realizing current ratio according to claim 1, characterized in that: One end of the limit spring (24) close to the limit block (25) is fixedly connected to the limit block (25), and one end of the limit spring (24) away from the limit block (25) is fixedly connected to the inside of the limit cavity (23).

3. A new type of current transformer for realizing current ratio according to claim 2, characterized in that: A slope is provided on one side of the limit block (25) close to the top block (26), and the limit block (25) is in abutment with the top block (26).

4. A new type of current transformer for realizing current ratio according to claim 3, characterized in that: The pushing assembly comprises a moving block (27), a moving groove (28), a guide rail (29) and a return spring (210); the moving block (27) is fixedly connected to one end of the top block (26) close to the fixed clamp (3), and the moving block (27) is slidably connected to the inside of the moving groove (28); the moving groove (28) is opened on the fixed clamp (3); the guide rail (29) is fixedly connected to the inside of the moving groove (28), and the guide rail (29) passes through the moving block (27); and the return spring (210) is wound around the outside of the guide rail (29).

5. A new type of current transformer for realizing current ratio according to claim 4, characterized in that: The side of the return spring (210) close to the moving block (27) is fixedly connected to the moving block (27), and the side of the return spring (210) away from the moving block (27) is fixedly connected inside the moving groove (28).

6. A new type of current transformer for realizing current ratio according to claim 5, characterized in that: A movable block (211) is fixedly connected to one side of the top block (26) away from the moving block (27), and the movable block (211) is slidably connected to the inside of a movable groove (212), and the movable groove (212) is provided on the fixed clamp (3).

7. A new type of current transformer for realizing current ratio according to claim 6, characterized in that: A protective pad (46) is glued to the inner side of the clamping plate (45), and the protective pad (46) is made of rubber.

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