Current transformer with protection structure

Abstract

The utility model discloses a current transformer with a protection structure, and relates to the technical field of current transformers. The current transformer comprises a current transformer body, the front side of the current transformer body is provided with a wire holder, the top of the wire holder is provided with a cable, and the top of the wire holder is fixedly connected with a protective shell; a sealing assembly is arranged at the top of the protective shell and comprises a movable shaft, the movable shaft is movably connected to the interior of the protective shell, a sealing plate is fixedly connected to the surface of the movable shaft, and a baffle is fixedly connected to the front side of the sealing plate. According to the utility model, through the arrangement of the sealing assembly, the wiring seat can be shielded, after the cable and the wiring seat are installed and connected, the sealing effect can be achieved, through the arrangement of the anti-falling assembly, the sealing plug can be fixed on the surface of the cable through the effect of the heat shrink tube, and the sealing plug is clamped into the sealing groove to fix the cable. The cable is prevented from falling off in the accidental pulling process, and the protection effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of current transformers, and in particular relates to a current transformer with a protection structure. 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] When installing the current transformer in the prior art, it is necessary to connect the terminal block to the external cable, but the terminal block is often used exposed to the outside and lacks a protective structure. When a line fault occurs, an arc is likely to occur, causing a fire. At the same time, the cable lacks an anti-falling function. When the staff accidentally pulls the cable while inspecting the equipment, it is easy for the cable to fall off, which is very inconvenient to use.

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

[0005] The purpose of the utility model is to provide a current transformer with a protective structure. Through the cooperation of a sealing component and an anti-detachment component, the problem that the current transformer in the prior art lacks a wiring protection function and is prone to fire caused by electric arcs when a line fails or a cable is accidentally pulled and falls off is solved.

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

[0007] The utility model is a current transformer with a protective structure, comprising a current transformer body, a wiring seat is installed on the front side of the current transformer body, a cable is arranged on the top of the wiring seat, and a protective shell is fixedly connected to the top of the wiring seat;

[0008] A sealing assembly is provided on the top of the protective shell, and the sealing assembly includes a movable shaft, the movable shaft is movably connected to the inside of the protective shell, a sealing plate is fixedly connected to the surface of the movable shaft, a baffle is fixedly connected to the front side of the sealing plate, a support rod is fixedly connected to one side of the sealing plate, and a card slot is opened on the top of the protective shell;

[0009] An anti-dropping component is arranged on the top of the wiring seat, and the anti-dropping component comprises a heat shrink tube, the heat shrink tube is sleeved on the surface of the cable, and one end of the heat shrink tube is fixedly connected with a sealing plug.

[0010] The utility model is further configured that the anti-dropping component also includes a sealing groove, the sealing groove is opened on the top of the wiring seat, and the anti-dropping groove is opened on the bottom of the baffle.

[0011] The utility model is further configured that a slide plate is fixedly connected to one side of the support rod, a clamping plug is sleeved on the surface of the slide plate, and a pull rod is fixedly connected to one side of the clamping plug.

[0012] The utility model is further configured that a return spring is sleeved on the surface of the support rod, and two ends of the return spring are respectively fixedly connected to the slide plate and the inner wall of the card plug.

[0013] The utility model is further configured that a mounting groove is provided inside the card slot, and the diameter of the mounting groove is the same as the diameter of the card plug.

[0014] The utility model is further configured that heat-conducting fins are fixedly connected to both sides of the current transformer body, and a nameplate is fixedly connected to the front side of the current transformer body.

[0015] The utility model is further configured that mounting plates are fixedly connected to both sides of the current transformer body, and a flame retardant pad is fixedly connected to the inside of the sealing plate.

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

[0017] The utility model can shield the terminal block through the setting of the sealing component, and can play a sealing role after the cable is installed and connected with the terminal block. Through the setting of the anti-dropping component, the sealing plug can be fixed to the cable surface by utilizing the effect of the heat shrink tube, and the sealing plug can be inserted into the sealing groove to fix the cable, thereby preventing the cable from falling off during accidental pulling, thereby improving the protective 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 current transformer with a protective structure;

[0021] Figure 2 A schematic diagram of the rotation of a sealing plate and a baffle in a current transformer with a protective structure;

[0022] Figure 3 A current transformer with a protective structure Figure 2 A magnified view of middle;

[0023] Figure 4 A cross-sectional view of a plug in a current transformer having a protective structure;

[0024] Figure 5 The present invention is a schematic diagram of the connection between a card plug and a mounting slot in a current transformer with a protective structure.

[0025] In the attached drawings: 1. Current transformer body; 2. Terminal block; 3. Cable; 4. Protective shell; 5. Movable shaft; 6. Sealing plate; 7. Baffle; 8. Support rod; 9. Card slot; 10. Heat shrink tube; 11. Sealing plug; 12. Sealing groove; 13. Anti-slip groove; 14. Slide plate; 15. Card plug; 16. Pull rod; 17. Reset spring; 18. Installation groove; 19. Thermal fin; 20. Nameplate; 21. Installation plate; 22. Flame retardant pad. 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 current transformer with a protective structure, including a current transformer body 1, a terminal block 2 is installed on the front side of the current transformer body 1, a cable 3 is arranged on the top of the terminal block 2, and a protective shell 4 is fixedly connected to the top of the terminal block 2; a sealing component is arranged on the top of the protective shell 4, and the sealing component includes a movable shaft 5, and the movable shaft 5 is movably connected to the inside of the protective shell 4, and a sealing plate 6 is fixedly connected to the surface of the movable shaft 5, a baffle 7 is fixedly connected to the front side of the sealing plate 6, a support rod 8 is fixedly connected to one side of the sealing plate 6, and a card slot 9 is opened on the top of the protective shell 4; an anti-detachment component is arranged on the top of the terminal block 2, and the anti-detachment component includes a heat shrink tube 10, the heat shrink tube 10 is sleeved on the surface of the cable 3, and a sealing plug 11 is fixedly connected to one end of the heat shrink tube 10.

[0029] Specifically: a screw terminal is installed inside the terminal block 2, and the cable 3 is rotated and clamped by the screw terminal to ensure a firm and stable connection. The diameter of the support rod 8 is the same as the diameter of the slot 9. At the same time, the slot 9 is designed in an arc shape, and on the rotation path of the support rod 8, the heat shrink tube 10 can shrink due to the external high temperature. When it is put on the surface of the cable 3 and shrunk and fixed, the sealing plug 11 can be fixed to the surface of the cable 3 to prevent it from falling off. Specific embodiment 2

[0031] See also Figure 1-5On the basis of the specific embodiment 1, the anti-slip assembly also includes a sealing groove 12, the sealing groove 12 is opened at the top of the terminal block 2, the bottom of the baffle 7 is provided with an anti-slip groove 13, a slide plate 14 is fixedly connected to one side of the support rod 8, a card plug 15 is sleeved on the surface of the slide plate 14, a pull rod 16 is fixedly connected to one side of the card plug 15, a reset spring 17 is sleeved on the surface of the support rod 8, and the two ends of the reset spring 17 are respectively fixedly connected to the inner wall of the slide plate 14 and the card plug 15, an installation groove 18 is opened inside the card groove 9, and the diameter of the installation groove 18 is the same as the diameter of the card plug 15, heat-conducting fins 19 are fixedly connected to both sides of the current transformer body 1, a nameplate 20 is fixedly connected to the front side of the current transformer body 1, mounting plates 21 are fixedly connected to both sides of the current transformer body 1, and a flame-retardant pad 22 is fixedly connected to the inside of the sealing plate 6.

[0032] Specifically: when the sealing groove 12 and the anti-slip groove 13 are fitted together, they can form a circle and limit the sealing plug 11 to prevent the sealing plug 11 from detaching from the sealing groove 12, thereby fixing the cable 3. The reset spring 17 has the function of compressing energy storage. When the card plug 15 is pulled, the reset spring 17 can be squeezed and the card plug 15 can be elastically supported by the reset spring 17. The thermal fins 19 can increase the heat dissipation area of ​​the current transformer body 1 and improve the heat dissipation effect. The nameplate 20 is used to record the working parameters of the current transformer body 1. The flame retardant pad 22 is made of flame retardant glass fiber cloth, which can prevent open flames from burning when the cable 3 fails, thereby playing a fire prevention role.

[0033] The working principle of the utility model is as follows: the staff puts the heat shrink tube 10 and the sealing plug 11 on the surface of the cable 3, and then heats the heat shrink tube 10 through an external heating device to shrink the heat shrink tube 10 and fix it on the surface of the cable 3, and then connects and fixes the cable 3 connector to the terminal block 2, and snaps the sealing plug 11 downward into the sealing groove 12 to fix the cable 3;

[0034] Then, the card plug 15 is manually pulled to the right, and the card plug 15 squeezes the reset spring 17 when it moves, and then the sealing plate 6 is rotated with the movable shaft 5 as the axis. While the sealing plate 6 rotates, the baffle plate 7 is driven to cover the sealing plug 11, and the anti-slip groove 13 at the bottom of the baffle plate 7 prevents the sealing plug 11 from detaching from the wiring seat 2, thereby preventing the cable 3 from detaching;

[0035] As the sealing plate 6 rotates, it drives the support rod 8 to be inserted into the card slot 9, and aligns the card plug 15 with the installation slot 18, and then releases the card plug 15. Under the elastic action of the reset spring 17, the card plug 15 is inserted into the installation slot 18, and the sealing plate 6 and the baffle 7 can be fixed. After the cable 3 is installed and connected to the terminal block 2, it can play a sealing role and improve the protection effect.

[0036] 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.

[0037] 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 current transformer with a protective structure, comprising a current transformer body (1), characterized in that: A wiring seat (2) is installed on the front side of the current transformer body (1), a cable (3) is arranged on the top of the wiring seat (2), and a protective shell (4) is fixedly connected to the top of the wiring seat (2); A sealing assembly is arranged at the top of the protective shell (4), the sealing assembly comprises a movable shaft (5), the movable shaft (5) is movably connected to the inside of the protective shell (4), a sealing plate (6) is fixedly connected to the surface of the movable shaft (5), a baffle (7) is fixedly connected to the front side of the sealing plate (6), a support rod (8) is fixedly connected to one side of the sealing plate (6), and a card slot (9) is opened at the top of the protective shell (4); An anti-dropping component is provided on the top of the wiring seat (2), and the anti-dropping component comprises a heat shrink tube (10). The heat shrink tube (10) is sleeved on the surface of the cable (3), and one end of the heat shrink tube (10) is fixedly connected to a sealing plug (11).

2. The current transformer with a protection structure according to claim 1, characterized in that: The anti-dropout assembly further comprises a sealing groove (12), wherein the sealing groove (12) is provided at the top of the wiring seat (2), and an anti-dropout groove (13) is provided at the bottom of the baffle (7).

3. The current transformer with a protection structure according to claim 1, characterized in that: A slide plate (14) is fixedly connected to one side of the support rod (8), a card plug (15) is sleeved on the surface of the slide plate (14), and a pull rod (16) is fixedly connected to one side of the card plug (15).

4. The current transformer with a protection structure according to claim 3, characterized in that: A return spring (17) is sleeved on the surface of the support rod (8), and two ends of the return spring (17) are respectively fixedly connected to the slide plate (14) and the inner wall of the card plug (15).

5. The current transformer with a protection structure according to claim 1, characterized in that: The card slot (9) is provided with a mounting slot (18) inside, and the diameter of the mounting slot (18) is the same as the diameter of the card plug (15).

6. The current transformer with a protection structure according to claim 1, characterized in that: Both sides of the current transformer body (1) are fixedly connected with heat-conducting fins (19), and the front side of the current transformer body (1) is fixedly connected with a nameplate (20).

7. The current transformer with a protection structure according to claim 1, characterized in that: Both sides of the current transformer body (1) are fixedly connected with mounting plates (21), and the interior of the sealing plate (6) is fixedly connected with a flame retardant pad (22).

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