Combined current transformer

Abstract

The utility model relates to the technical field of current transformers, and discloses a combined current transformer which comprises a transformer body, the bottom of the transformer body is fixedly connected with a transformer base, the bottom of the transformer base is fixedly connected with an installation assembly, a clamping device is arranged on the installation assembly in a penetrating mode, and the clamping device comprises a moving block. A threaded rod is fixedly connected to the top of the moving block, sliding grooves are formed in the threaded rod and the moving block, pressing rods are slidably connected into the sliding grooves, supporting rods are slidably connected to the bottoms of the pressing rods, storage grooves are formed in the two sides of the moving block, and supporting blocks are rotatably connected to the inner sides of the storage grooves. According to the device, the movable block is inserted downwards along the hole, the supporting plates on the two sides of the movable block can automatically expand outwards by means of the torsional springs, the threaded block on the threaded rod moves downwards by means of the action of threads by twisting the handle, and the threaded block abuts against the mutual inductor base to complete fixation of the mutual inductor; during taking-out, the pressing rod is pressed downwards to extrude one end of the torsional spring to retract the supporting rod into the storage groove.

Description

Technical Field

[0001] The utility model relates to the technical field of current transformers, in particular to a combined current transformer. Background Art

[0002] The current transformer is an instrument that converts the large current on the primary side into a small current on the secondary side for measurement based on the principle of electromagnetic induction. The current transformer is composed of a closed iron core and a winding. Its primary winding has few turns and is connected in series in the circuit of the current to be measured, so it often has the entire current of the circuit flowing 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, so 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 a short circuit. The current transformer converts the large current on the primary side into a small current on the secondary side for measurement, and the secondary side cannot be open.

[0003] After searching, the announcement number CN216980268U discloses a current transformer that is easy to install, including a positioning mechanism and a host mechanism. The positioning mechanism includes a positioning base, a hidden groove is provided at the center of the lower end surface of the positioning base, a rotating seat is fixedly provided at the center of the rear inner wall of the hidden groove, a positioning hole is provided at the center of the front inner wall of the hidden groove, a bearing is fixedly provided inside the positioning hole, an output pipe is fixedly provided inside the bearing, a control air valve is fixedly provided at the front end of the output pipe, and a plurality of vacuum suction cups are fixedly connected to the output pipe body located inside the hidden groove through a universal tube in an equidistant shape, and positioning plates are fixedly provided at both sides of the upper end surface of the positioning base. The utility model discloses a current transformer that is easy to install, which is easy to install, simple to disassemble, and convenient for maintenance and transportation.

[0004] In the above application, during actual installation and use, due to the different shapes of different current transformers and chassis, some types of current transformer chassis are not suitable for suction cups, resulting in poor fixing effect and certain problems during use. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a combined current transformer, which aims to improve the installation method in the above application, which has defective adaptability and is only suitable for some current transformers.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a combined current transformer, comprising a transformer body, the bottom of the transformer body is fixedly connected to a transformer base, the bottom of the transformer base is fixedly connected to a mounting assembly, the mounting assembly is penetrated by a clamping device, the clamping device comprises a moving block, the top of the moving block is fixedly connected to a threaded rod, the threaded rod and the moving block are both provided with sliding grooves, a pressure rod is slidably connected in the sliding groove, the bottom of the pressure rod is fixedly connected to a ring, the bottom of the pressure rod is slidably connected to a support rod, storage grooves are provided on both sides of the moving block, and a support block is rotatably connected to the inner side of the storage groove.

[0007] Preferably, the installation assembly comprises an installation frame, a groove is formed on the top of the installation frame, sliding grooves are formed on both sides of the installation frame, and a moving rod is slidably connected in the sliding groove.

[0008] Preferably, threaded plates are symmetrically fixedly connected to both sides of the installation frame.

[0009] Preferably, one end of the moving rod is threadedly connected with a nut.

[0010] Preferably, one end of a spring is fixedly connected to the bottom of the sliding groove, and the other end of the spring is fixedly connected to the bottom of the ring.

[0011] Preferably, one end of a torsion spring is fixedly connected to the bottom of the support block, and the other end of the torsion spring is arranged at the bottom of the circular ring.

[0012] Preferably, a fixing rod is fixedly connected to the outer side of the top of the threaded rod, and the fixing rod is arranged directly above the pressure rod.

[0013] Preferably, the outer side of the threaded rod is threadedly connected to a threaded block, and the outer side of the threaded block is fixedly connected to a handle.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, the installation and fixation of the transformer body is achieved by passing through the clamping device on the transformer base and the mounting assembly. The moving block is inserted downward along the holes on the transformer base and the mounting assembly. The support plates on both sides of the moving block will automatically open outward with the help of torsion springs. The fixing rod is pressed and the handle is twisted. The threaded block on the threaded rod moves downward with the help of the thread. The threaded block is pressed against the transformer base to complete the fixation of the transformer. This clamping device is simple to use and convenient to operate.

[0016] 2. In the utility model, the distance is changed by moving the slider on the outside of the moving rod in the installation frame in the groove, so as to adapt to the sizes of different transformer bases. After the size is determined, the nut at one end of the moving rod is rotated to fix the slider with the help of the thread action, thereby fixing the transformer fixed with the slider. At the same time, the installation assembly is simple to disassemble and easy to replace.

[0017] 3. In the utility model, if the transformer fails and needs to be replaced or repaired, it is only necessary to press the pressure rod downward, and the pressure rod squeezes one end of the torsion spring to retract the support rod into the storage groove, and then twist the handle to move the threaded block upward to remove the moving block. This structure facilitates the replacement and repair of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a combined current transformer proposed by the utility model;

[0019] Figure 2 This is a structural schematic diagram of a clamping device of a combined current transformer proposed by the utility model;

[0020] Figure 3 A cross-sectional view of a clamping device of a combined current transformer proposed by the utility model;

[0021] Figure 4 This is a structural schematic diagram of an installation assembly of a combined current transformer proposed by the utility model;

[0022] Figure 5 for Figure 3 Enlarged view of point A in .

[0023] Legend:

[0024] 1. Transformer body; 2. Transformer base; 3. Mounting frame; 4. Threaded plate; 5. Moving rod; 6. Slider; 7. Slide groove; 8. Nut; 9. Moving block; 10. Support block; 11. Storage groove; 12. Threaded rod; 13. Threaded block; 14. Press rod; 15. Fixed rod; 16. Handle; 17. Spring; 18. Support rod; 19. Ring; 20. Torsion spring. DETAILED DESCRIPTION

[0025] 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.

[0026] Reference Figure 1-3The utility model provides an embodiment: a combined current transformer, including a transformer body 1, a transformer base 2 is fixedly connected to the bottom of the transformer body 1, a mounting assembly is fixedly connected to the bottom of the transformer base 2, slots are provided on the transformer base 2 and the mounting assembly, a clamping device is provided on the mounting assembly, the clamping device includes a moving block 9, the moving block 9 can move up and down in the slot, a threaded rod 12 is fixedly connected to the top of the moving block 9, a threaded block 13 is threadedly connected to the outer side of the threaded rod 12, a handle 16 is fixedly connected to the outer side of the threaded block 13, and the handle 16 can be turned to drive the threaded block 13 to move up and down on the threaded rod 12 by means of the threaded action, and sliding grooves are provided inside the threaded rod 12 and the moving block 9. A pressure rod 14 is slidably connected in the sliding groove, and the pressure rod 14 can move up and down in the sliding groove. A circular ring 19 is fixedly connected to the bottom of the pressure rod 14, and a support rod 18 is slidably connected to the bottom of the pressure rod 14. Receiving grooves 11 are provided on both sides of the moving block 9. A support block 10 is rotatably connected to the inner side of the receiving groove 11, and the support block 10 can be received in the receiving groove 11 after rotation. One end of a torsion spring 20 is fixedly connected to the bottom of the support block 10, and the other end of the torsion spring 20 is arranged at the bottom of the circular ring 19. When the circular ring 19 is pressed down and squeezed to one end of the torsion spring 20, the other end of the torsion spring 20 will drive the support block 10 to rotate into the receiving groove 11. A fixing rod 15 is fixedly connected to the outer side of the top of the threaded rod 12, and the fixing rod 15 is arranged directly above the pressure rod 14.

[0027] Reference Figure 4 The installation component includes an installation frame 3, a groove is provided on the top of the installation frame 3, and slide grooves 7 are provided on both sides of the installation frame 3. A moving rod 5 is slidably connected in the slide groove 7, and the moving rod 5 can move in the slide groove 7. A slider 6 is slidably connected to the outer side of the moving rod 5, and a notch is provided on the top of the slider 6, and the slider 6 can move in the groove. Threaded plates 4 are symmetrically fixedly connected on both sides of the installation frame 3, and screw holes are provided in the threaded plates 4 for fixing the installation frame 3. A nut 8 is threadedly connected to one end of the moving rod 5, and the nut 8 can be rotated to fix the moving rod 5 and the slider 6 by means of the threaded connection.

[0028] Working principle: first fix the installation frame 3, screw the screws into the threaded plate 4, then determine the size of the transformer base 2, adjust the position of the slider 6 in the groove of the installation frame 3 after determining the size, rotate the nut 8 at one end of the moving rod 5 to fix the slider 6, then align the notch on the transformer base 2 with the notch on the slider 6, insert the locking device, insert the moving block 9, the support block 10 automatically opens and supports the bottom of the slider 6, turn the handle 16 to drive the threaded block 13 downward, and the threaded block 13 is against the transformer base 2 to complete the fixation.

[0029] 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 combined current transformer, comprising a transformer body (1), the bottom of the transformer body (1) being fixedly connected to a transformer base (2), characterized in that: The bottom of the transformer base (2) is fixedly connected to a mounting assembly, and a snap-fit ​​device is provided on the mounting assembly. The snap-fit ​​device comprises a moving block (9), and a threaded rod (12) is fixedly connected to the top of the moving block (9). The threaded rod (12) and the moving block (9) are provided with sliding grooves inside. A pressure rod (14) is slidably connected in the sliding groove. A circular ring (19) is fixedly connected to the bottom of the pressure rod (14), and a support rod (18) is slidably connected to the bottom of the pressure rod (14). Receiving grooves (11) are provided on both sides of the moving block (9), and a support block (10) is rotatably connected inside the receiving groove (11).

2. A combined current transformer according to claim 1, characterized in that: The installation assembly comprises an installation frame (3), a groove is provided on the top of the installation frame (3), sliding grooves (7) are provided on both sides of the installation frame (3), a moving rod (5) is slidably connected in the sliding groove (7), and a slider (6) is slidably connected to the outer side of the moving rod (5).

3. A combined current transformer according to claim 2, characterized in that: Threaded plates (4) are symmetrically fixedly connected to both sides of the installation frame (3).

4. A combined current transformer according to claim 2, characterized in that: One end of the moving rod (5) is threadedly connected with a nut (8).

5. A combined current transformer according to claim 1, characterized in that: One end of a spring (17) is fixedly connected to the bottom of the sliding groove, and the other end of the spring (17) is fixedly connected to the bottom of the ring (19).

6. A combined current transformer according to claim 1, characterized in that: One end of a torsion spring (20) is fixedly connected to the bottom of the support block (10), and the other end of the torsion spring (20) is arranged at the bottom of the circular ring (19).

7. A combined current transformer according to claim 1, characterized in that: A fixing rod (15) is fixedly connected to the outer side of the top of the threaded rod (12), and the fixing rod (15) is arranged directly above the pressure rod (14).

8. A combined current transformer according to claim 1, characterized in that: The outer side of the threaded rod (12) is threadedly connected to a threaded block (13), and the outer side of the threaded block (13) is fixedly connected to a handle (16).

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