Residual current transformer

Abstract

The utility model belongs to the technical field of residual current transformers, and discloses a residual current transformer which comprises an installation base and a transformer body, the transformer body is installed on the installation base, a transmission cavity is formed in the installation base, and when the transformer body is installed, the installation base is fixed through bolts firstly, and then the transmission cavity is formed in the transmission cavity. Then a driving gear is rotated to enable two transmission sliding blocks to be far away from each other, two limiting clamping blocks are far away from each other, at the moment, the transformer body is placed between two limiting strips and the two limiting clamping blocks, and at the moment, the driving gear is rotated to drive the two transmission sliding blocks to be close to each other; when maintenance is needed, a driving gear is rotated to drive two transmission sliding blocks to be far away from each other, the two limiting clamping blocks can be far away from each other, locking and fixing of the mutual inductor main body are relieved, and the mutual inductor main body can be installed conveniently. And then the disassembly process of the mutual inductor main body is completed.

Description

Technical Field

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

[0002] The residual current transformer is the detection element of the leakage protector. Its main function is to detect the residual current of the main circuit passing through the transformer core (ground fault current such as electric shock and leakage), and convert the residual current of the primary circuit into the output voltage of the secondary circuit. The residual current transformer is one of the most critical components in the leakage protector. The excitation current of the primary circuit of the residual current transformer is very small, and it works under weak magnetic field conditions. For the residual current protection device with a rated residual operating current of 0.006A, the minimum working magnetic field strength is only about 0.080A / m. When working, the main circuit is often subjected to large starting currents of hundreds to thousands of amperes or short-circuit currents of tens of thousands of amperes. The residual current transformer is in an extreme saturation state. In this case, the transformer cannot be affected by the residual magnetism generated by the impact current. Action characteristics.

[0003] The patent with publication number CN 212209121 U discloses a residual current transformer, including a rectangular shell and an annular shell, wherein a rectangular core is provided inside the rectangular shell, and a rectangular winding is provided outside the rectangular core, a positioning rod is provided below the inner side of the rectangular shell, and mounting seats are fixedly installed on both sides of the outer side of the rectangular shell, a rectangular core is fixedly installed at the bottom of the annular shell, and an annular core is provided inside the annular shell. The utility model is provided with a mounting seat and an anti-slip pad, which can fix the transformer, and at the same time, the stability of the transformer during installation is increased by the protective pad, and the loose installation caused by vibration in the later stage is avoided, the practicality is improved, and the limitations are reduced. A wiring seat and a protective cover are provided to connect the transformer with an external device, and the protective cover can protect the wiring seat, which increases the safety of the wiring seat when not in use, makes the transformer more convenient to use, and expands the scope of application.

[0004] However, the device is fixed by bolts, which is a relatively traditional fixing method. It is inconvenient to disassemble and assemble when the mutual inductor needs to be replaced or maintained, the efficiency is average, and the installation is unstable due to thread slippage. Utility Model Content

[0005] The purpose of the utility model is to provide a residual current transformer to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a residual current transformer, comprising a mounting seat and a transformer body, the transformer body being mounted on the mounting seat, a transmission cavity being provided in the mounting seat, a driving gear being rotatably installed in the transmission cavity, two transmission sliders being slidably arranged in the transmission cavity, both transmission sliders being provided with transmission tooth grooves meshing with the driving gear, the tops of both transmission sliders being connected with limit blocks penetrating the mounting seat and extending to the outside, two mutually symmetrical mounting plates being arranged on the mounting seat, through holes being provided on the mounting plates, a reinforcing rib plate being arranged between the mounting plate and the mounting seat, two mutually symmetrical limit strips being arranged on the top of the mounting seat, and the spacing between the two limit strips being adapted to the width of the transformer body.

[0007] Preferably, the mounting seat is provided with two rectangular holes which are symmetrical to each other and communicate with the transmission cavity.

[0008] Preferably, the two limit blocks are slidably arranged in the two rectangular holes respectively.

[0009] Preferably, two mutually symmetrical guide rods are arranged in the transmission cavity, and two transmission sliders are provided with sliding holes matched with the guide rods.

[0010] Preferably, a compression spring is sleeved on the guide rod, one end of the compression spring is mounted on the inner wall of the transmission cavity, and the other end of the compression spring is mounted on the transmission slider.

[0011] Preferably, a knob penetrating the transmission cavity and extending to the outside is installed at one end of the driving gear, and a flat groove is provided on the knob.

[0012] Preferably, a rotating shaft is arranged at one end of the driving gear away from the knob, and a rotating hole matched with the rotating shaft is opened on the inner wall of the transmission cavity.

[0013] The beneficial effects of the utility model are:

[0014] In the utility model, through the mutual cooperation of the structures such as the mounting seat, the limit card block and the driving gear, when the transformer body is installed, the mounting seat is first fixed by bolts, and then the two transmission sliders are moved away from each other by rotating the driving gear, so that the two limit card blocks are moved away from each other. At this time, the transformer body is placed between the two limit bars and the two limit card blocks. At this time, the two transmission sliders are driven to approach each other by rotating the driving gear, and then the two limit card blocks are moved closer to each other to clamp and fix the transformer body, thereby completing the installation of the transformer body. When maintenance is required, it is only necessary to rotate the driving gear to drive the two transmission sliders to move away from each other, so that the two limit card blocks can move away from each other and release the locking and fixing of the transformer body, thereby completing the disassembly process of the transformer body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a residual current transformer proposed by the utility model;

[0016] Figure 2 A schematic cross-sectional structure diagram of a transmission slider, a driving gear, a guide rod and other structures of a residual current transformer proposed by the utility model;

[0017] Figure 3 A residual current transformer proposed by the utility model Figure 3 A schematic diagram of the structure enlargement in the middle;

[0018] Figure 4 The utility model provides a schematic cross-sectional structure diagram of a driving gear, a rotating shaft, a knob and other structures of a residual current transformer.

[0019] In the figure: 1. mounting seat; 2. mounting plate; 3. rectangular hole; 4. limit block; 5. transformer body; 6. transmission cavity; 7. driving gear; 8. sliding hole; 9. reinforcing rib plate; 10. through hole; 11. guide rod; 12. compression spring; 13. transmission slider; 14. knob; 15. flat groove; 16. rotating shaft; 17. rotating hole; 18. limit strip; 19. transmission tooth groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-4 A residual current transformer comprises a mounting base 1 and a transformer body 5, wherein the transformer body 5 is mounted on the mounting base 1, a transmission cavity 6 is provided in the mounting base 1, a driving gear 7 is rotatably installed in the transmission cavity 6, two transmission sliders 13 are slidably arranged in the transmission cavity 6, and transmission tooth grooves 19 meshing with the driving gear 7 are provided on the two transmission sliders 13, and the tops of the two transmission sliders 13 are connected with limit blocks 4 penetrating the mounting base 1 and extending to the outside, two mutually symmetrical mounting plates 2 are arranged on the mounting base 1, through holes 10 are provided on the mounting plates 2, a reinforcing rib plate 9 is arranged between the mounting plates 2 and the mounting base 1, and two mutually symmetrical limit strips 18 are arranged on the top of the mounting base 1, and the spacing between the two limit strips 18 is adapted to the width of the transformer body 5.

[0022] By the mutual cooperation of the structures such as the mounting seat 1, the limit card block 4 and the driving gear 7, when installing the transformer body 5, the mounting seat 1 can be fixed by bolts first, and then the two transmission sliders 13 are moved away from each other by rotating the driving gear 7, so that the two limit card blocks 4 are moved away from each other. At this time, the transformer body 5 is placed between the two limit bars 18 and the two limit card blocks 4. At this time, the two transmission sliders 13 are driven to approach each other by rotating the driving gear 7, and then the two limit card blocks 4 are brought close to each other to clamp and fix the transformer body 5, thereby completing the installation of the transformer body 5. When maintenance is required, it is only necessary to drive the two transmission sliders 13 away from each other by rotating the driving gear 7, so that the two limit card blocks 4 can be moved away from each other and the locking and fixing of the transformer body 5 can be released, thereby completing the disassembly process of the transformer body 5.

[0023] Specifically, in this embodiment, the mounting seat 1 is provided with two rectangular holes 3 which are symmetrical to each other and communicate with the transmission cavity 6 , and the two limit blocks 4 are slidably arranged in the two rectangular holes 3 .

[0024] By arranging the rectangular holes 3 , the moving direction of the limit block 4 can be guided and the moving range of the limit block 4 can be limited.

[0025] Specifically, in this embodiment, two mutually symmetrical guide rods 11 are arranged in the transmission chamber 6, and two transmission sliders 13 are provided with sliding holes 8 adapted to the guide rods 11. A compression spring 12 is sleeved on the guide rod 11, and one end of the compression spring 12 is installed on the inner wall of the transmission chamber 6, and the other end of the compression spring 12 is installed on the transmission slider 13.

[0026] By arranging the guide rod 11 and the sliding hole 8, the transmission slider 13 can slide along the guide rod 11 through the sliding hole 8 and squeeze the compression spring 12 on the guide rod 11, so that the transmission slider 13 can be automatically reset by the elastic potential energy of the compression spring 12, and in the normal state, the two transmission sliders 13 can always be kept close to each other, thereby ensuring the locking stability of the transformer body 5.

[0027] Specifically, in this embodiment, a knob 14 penetrating the transmission cavity 6 and extending to the outside is installed at one end of the driving gear 7 , and a flat groove 15 is formed on the knob 14 .

[0028] The flat groove 15 and the knob 14 are arranged to facilitate the rotation of the driving gear 7 .

[0029] Specifically, in this embodiment, a rotating shaft 16 is arranged at one end of the driving gear 7 away from the knob 14 , and a rotating hole 17 matched with the rotating shaft 16 is opened on the inner wall of the transmission cavity 6 .

[0030] By arranging the rotating shaft 16 and the rotating hole 17 , the driving gear 7 can be rotated along the rotating hole 17 via the rotating shaft 16 , thereby improving the stability of the driving gear 7 during the rotation process.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A residual current transformer, comprising a mounting base and a transformer body, characterized in that: The transformer body is installed on the mounting seat, a transmission cavity is provided in the mounting seat, a driving gear is rotatably installed in the transmission cavity, two transmission sliders are slidably arranged in the transmission cavity, both transmission sliders are provided with transmission tooth grooves meshing with the driving gear, the tops of the two transmission sliders are connected with limit blocks that penetrate the mounting seat and extend to the outside, two mutually symmetrical mounting plates are arranged on the mounting seat, through holes are provided on the mounting plates, a reinforcing rib plate is arranged between the mounting plate and the mounting seat, two mutually symmetrical limit strips are arranged on the top of the mounting seat, and the spacing between the two limit strips is adapted to the width of the transformer body.

2. A residual current transformer according to claim 1, characterized in that: The mounting seat is provided with two rectangular holes which are symmetrical to each other and communicated with the transmission cavity.

3. A residual current transformer according to claim 1, characterized in that: The two limit blocks are slidably arranged in the two rectangular holes respectively.

4. A residual current transformer according to claim 1, characterized in that: Two mutually symmetrical guide rods are arranged in the transmission cavity, and two transmission sliding blocks are provided with sliding holes matched with the guide rods.

5. A residual current transformer according to claim 4, characterized in that: A compression spring is sleeved on the guide rod, one end of the compression spring is installed on the inner wall of the transmission cavity, and the other end of the compression spring is installed on the transmission sliding block.

6. A residual current transformer according to claim 1, characterized in that: A knob penetrating the transmission cavity and extending to the outside is installed at one end of the driving gear, and a flat groove is provided on the knob.

7. A residual current transformer according to claim 6, characterized in that: A rotating shaft is arranged at one end of the driving gear away from the knob, and a rotating hole matched with the rotating shaft is opened on the inner wall of the transmission cavity.

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