Matching type combined current transformer

Abstract

The utility model discloses a matching type combined current transformer, and relates to the technical field of electrical equipment. The combined current transformer comprises a combined current transformer body, a terminal base is installed on the front side of the combined current transformer body, and a partition plate is installed in the terminal base; a wire clamping assembly is arranged at the top of the terminal base, the wire clamping assembly comprises a top plate, the top plate is arranged at the top of the terminal base, supporting shafts are fixedly connected to the opposite sides of the top plate and the terminal base, and a clamping plate is fixedly connected to one end of each supporting shaft. According to the utility model, through the arrangement of the wire clamping assembly, after an external cable is connected with the terminal seat, the top plate can be rotated forwards by taking the movable rod as an axis, the cable is fixed through the two groups of clamping plates, the cable is prevented from loosening when a screw terminal is loosened, and the anti-falling protection effect is achieved; and the two groups of clamping seats can rotate along with the cable, so that the cable is prevented from being excessively bent when being pulled, and the protection effect is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical equipment, and particularly relates to a coordinated combined current transformer. Background Art

[0002] The current transformer is composed of a closed iron core and a winding. Its primary winding has very few turns and is connected in series in the circuit of the current to be measured. Therefore, the entire current of the circuit often flows through it. The secondary winding has more turns and is connected in series in the measuring instrument and the protection circuit. When the current transformer is working, its secondary circuit is always closed. Therefore, the impedance of the series coil of the measuring instrument and the protection circuit is very small, and the working state of the current transformer is close to short circuit.

[0003] The current transformer in the prior art needs to be connected to the external cable through a terminal block during installation, and the wire ends are usually compressed and fixed with screw terminals. However, after long-term use, they will become loose to a certain extent, causing the wires to fall off or have poor contact. The current transformer is used to protect circuit breakers and relays in the power system. If the wires fall off, the protection device will not be able to correctly sense the current abnormality, and thus will not be able to cut off the faulty circuit in time, increasing the safety risks of power equipment and personnel.

[0004] To this end, we provide a coordinated combined current transformer to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a matching combined current transformer, which solves the problem that the current transformer in the prior art lacks the cable anti-falling function through the cooperation of the wire clamping component and the limit component. After long-term use, the screw terminal will become loose, resulting in the wiring falling off or poor contact.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a matching combined current transformer, comprising a combined current transformer body, a terminal seat is installed at the front side of the combined current transformer body, and a partition is installed inside the terminal seat;

[0008] A wire clamping assembly is provided on the top of the terminal seat, and the wire clamping assembly includes a top plate, which is provided on the top of the terminal seat, and a support shaft is fixedly connected to one side of the top plate and the terminal seat, and a clamping plate is fixedly connected to one end of the support shaft, and a movable plate is sleeved on the surface of the support shaft, and a movable shaft is fixedly connected to the other side of the movable plate, and a clamping seat is fixedly connected to one end of the movable shaft;

[0009] A limiting component is arranged on one side of the terminal seat, and the limiting component comprises a movable rod, and the movable rod is fixedly connected to the rear side of the top plate. A sliding groove is arranged on one side of the terminal seat.

[0010] The utility model is further configured that arc grooves are provided on one side of the top plate opposite to the terminal seat, and an arc rod is slidably connected inside the movable shaft.

[0011] The utility model is further configured that springs are sleeved on both sides of the surface of the arc-shaped rod, and both ends of the arc-shaped rod are fixedly connected to the inner wall of the arc-shaped groove.

[0012] The utility model is further configured that a rubber pad is fixedly connected inside the clamping seat, and the surface of the movable rod is movably connected to the inner wall of the terminal seat through a bearing.

[0013] The utility model is further configured such that the limit assembly also includes a card slot, the card slot is opened inside the slide slot, a rotating plate is fixedly connected to the surface of the movable rod, a telescopic rod is penetrated through the front side of the rotating plate, and a pull rod is fixedly connected to the front end of the telescopic rod.

[0014] The utility model is further configured that the pull rod is slidably connected to the inner wall of the sliding groove, and the diameter of the pull rod is the same as the diameter of the clamping groove.

[0015] The utility model is further configured that an elastic sheet is fixedly connected inside the rotating plate, and the other end of the elastic sheet is fixedly connected to the telescopic rod.

[0016] The utility model has the following beneficial effects:

[0017] The utility model provides a wire clamping assembly, and after the external cable is connected to the terminal seat, the top plate can be rotated forward with the movable rod as the axis, and the cable can be fixed by two groups of clamping plates to prevent the cable from loosening when the screw terminal is loose, thereby playing a role of anti-falling protection. At the same time, when the cable is pulled, the two groups of clamping seats can rotate with the cable to prevent the cable from excessively bending when pulled, thereby further improving the protection effect.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments are briefly introduced below.

[0020] Figure 1 It is a structural stereogram of a matching combined current transformer;

[0021] Figure 2 A schematic diagram of the rotation of a top plate in a matching combined current transformer;

[0022] Figure 3 It is an exploded schematic diagram of the top structure of the arc slot in a matching combined current transformer;

[0023] Figure 4 A schematic diagram of the separation of a movable rod and a rotating plate in a matching combined current transformer;

[0024] Figure 5 The figure is a side cross-sectional view of a rotating plate in a matching combination current transformer.

[0025] In the attached drawings: 1. combined current transformer body; 2. terminal seat; 3. partition; 4. top plate; 5. support shaft; 6. clamping plate; 7. movable plate; 8. movable shaft; 9. clamping seat; 10. movable rod; 11. slide groove; 12. arc groove; 13. arc rod; 14. spring; 15. rubber pad; 16. slot; 17. rotating plate; 18. telescopic rod; 19. pull rod; 20. elastic sheet. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Specific embodiment 1

[0028] See also Figure 1-5 The utility model is a matching combined current transformer, including a combined current transformer body 1, a terminal seat 2 is installed on the front side of the combined current transformer body 1, and a partition 3 is installed inside the terminal seat 2; a wire clamping assembly is arranged on the top of the terminal seat 2, and the wire clamping assembly includes a top plate 4, and the top plate 4 is arranged on the top of the terminal seat 2, and the top plate 4 is fixedly connected to a support shaft 5 on the side opposite to the terminal seat 2, and a clamping plate 6 is fixedly connected to one end of the support shaft 5, and a movable plate 7 is sleeved on the surface of the support shaft 5, and a movable shaft 8 is fixedly connected to the other side of the movable plate 7, and a clamping seat 9 is fixedly connected to one end of the movable shaft 8; a limiting assembly is arranged on one side of the terminal seat 2, and the limiting assembly includes a movable rod 10, and the movable rod 10 is fixedly connected to the rear side of the top plate 4, and a slide groove 11 is opened on one side of the terminal seat 2.

[0029] Specifically: the terminal seat 2 is used to connect different current transformers or other related equipment. The cables are compressed by the internal screw terminals to ensure a stable connection and reliable signal transmission. The partition 3 is used to isolate the two groups of screw terminals to prevent contact short circuits. The two groups of clamping plates 6 are fixedly connected with rubber pads 15. The cables are clamped and fixed by the relative movement of the two groups of clamping plates 6. The bottom of the movable shaft 8 is slidably connected to the inner wall of the arc groove 12. When the cable is pulled, the clamping seat 9 can rotate along the arc groove 12 as a path to protect the cable from stretching. Specific embodiment 2

[0031] See also Figure 1-5 On the basis of the first specific embodiment, an arc groove 12 is provided on the opposite side of the top plate 4 and the terminal seat 2, an arc rod 13 is slidably connected inside the movable shaft 8, springs 14 are sleeved on both sides of the surface of the arc rod 13, both ends of the arc rod 13 are fixedly connected to the inner wall of the arc groove 12, a rubber pad 15 is fixedly connected inside the clamping seat 9, the surface of the movable rod 10 is movably connected to the inner wall of the terminal seat 2 through a bearing, the limit assembly also includes a slot 16, the slot 16 is opened inside the slide slot 11, a rotating plate 17 is fixedly connected to the surface of the movable rod 10, a telescopic rod 18 is penetrated on the front side of the rotating plate 17, a pull rod 19 is fixedly connected to the front end of the telescopic rod 18, the pull rod 19 is slidably connected to the inner wall of the slide slot 11, the diameter of the pull rod 19 is the same as the diameter of the slot 16, an elastic sheet 20 is fixedly connected to the rotating plate 17, and the other end of the elastic sheet 20 is fixedly connected to the telescopic rod 18.

[0032] Specifically: the slide groove 11 is designed to be arc-shaped, and the spring 14 has the function of compressing and storing energy, which can elastically support the movable shaft 8. After the cable is pulled, the cable can be elastically reset. The rubber pad 15 is fixed inside the clamping seat 9, which can clamp the cable. At the same time, the clamping force will not be too tight, and the cable can be kept moving slightly inside the clamping seat 9. The elastic sheet 20 can elastically support the telescopic rod 18, and the pull rod 19 is driven by the telescopic rod 18 to insert into the slot 16 to achieve the fixing effect on the position of the top plate 4.

[0033] The working principle of the utility model is as follows: after the staff connects the external cable to the terminal seat 2, the bottom of the cable is inserted into the clamping plate 6 and the clamping seat 9 at the top of the terminal seat 2, and then the pull rod 19 is pushed backward to disengage the pull rod 19 from the card slot 16, and then the pull rod 19 is rotated clockwise, and the pull rod 19 cooperates with the telescopic rod 18 to drive the rotating plate 17 to rotate, and the rotating plate 17 cooperates with the movable rod 10 to drive the top plate 4 to rotate. After the top plate 4 rotates forward, the two groups of clamping plates 6 and the two groups of clamping seats 9 are simultaneously fitted to clamp and fix the cable, thereby playing the function of preventing the cable from falling off;

[0034] When the cable is pulled left and right, the clamping seat 9 will rotate along the arc groove 12 as the path following the cable. The clamping seat 9 moves and drives the moving shaft 8 to squeeze the spring 14. The elastic action of the spring 14 buffers the pulling of the cable to improve the protection effect. At the same time, when the cable loses tension, the cable can be reset to avoid damage to the cable due to excessive bending, thereby improving the protection effect.

[0035] The standard parts used in the present invention can all be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatically controlled by a control unit. The control circuit of the control unit can be realized by simple programming by technicians in this field, which belongs to the common knowledge in this field. Therefore, the control method and circuit connection are no longer explained in detail in the present invention.

[0036] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model.

Claims

1. A matched combined current transformer, comprising a combined current transformer body (1), characterized in that: A terminal seat (2) is installed on the front side of the combined current transformer body (1), and a partition plate (3) is installed inside the terminal seat (2); A wire clamping assembly is arranged on the top of the terminal seat (2), and the wire clamping assembly comprises a top plate (4), the top plate (4) is arranged on the top of the terminal seat (2), the top plate (4) and the terminal seat (2) are both fixedly connected to a support shaft (5) on one side opposite to the terminal seat (2), one end of the support shaft (5) is fixedly connected to a clamping plate (6), a movable plate (7) is sleeved on the surface of the support shaft (5), the other side of the movable plate (7) is fixedly connected to a movable shaft (8), and one end of the movable shaft (8) is fixedly connected to a clamping seat (9); A limiting assembly is provided on one side of the terminal seat (2), the limiting assembly comprising a movable rod (10), the movable rod (10) being fixedly connected to the rear side of the top plate (4), and a sliding groove (11) is provided on one side of the terminal seat (2).

2. A coordinated combined current transformer according to claim 1, characterized in that: An arc groove (12) is provided on one side of the top plate (4) opposite to the terminal seat (2), and an arc rod (13) is slidably connected inside the movable shaft (8).

3. A coordinated combined current transformer according to claim 2, characterized in that: Springs (14) are sleeved on both sides of the surface of the arc-shaped rod (13), and both ends of the arc-shaped rod (13) are fixedly connected to the inner wall of the arc-shaped groove (12).

4. The coordinated combined current transformer according to claim 1, characterized in that: A rubber pad (15) is fixedly connected inside the clamping seat (9), and the surface of the movable rod (10) is movably connected to the inner wall of the terminal seat (2) via a bearing.

5. The coordinated combined current transformer according to claim 1, characterized in that: The limit assembly also includes a card slot (16), the card slot (16) is opened inside the slide slot (11), a rotating plate (17) is fixedly connected to the surface of the movable rod (10), a telescopic rod (18) is provided through the front side of the rotating plate (17), and a pull rod (19) is fixedly connected to the front end of the telescopic rod (18).

6. A coordinated combined current transformer according to claim 5, characterized in that: The pull rod (19) is slidably connected to the inner wall of the slide groove (11), and the diameter of the pull rod (19) is the same as the diameter of the clamping groove (16).

7. The coordinated combined current transformer according to claim 5, characterized in that: An elastic sheet (20) is fixedly connected inside the rotating plate (17), and the other end of the elastic sheet (20) is fixedly connected to the telescopic rod (18).

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