Electric field homogenization structure for reducing partial discharge capacity

Abstract

The utility model discloses an electric field uniformization structure for reducing partial discharge capacity, and particularly relates to the technical field of electric field uniformization, the electric field uniformization structure comprises a support plate, an annular cover and an insulating cover, the annular cover is fixedly connected to one side of the support plate, the insulating cover is fixedly connected to one side of the annular cover, and the inner wall of the insulating cover is provided with a uniform covering and pressing assembly; the uniform covering and pressing assembly comprises a cover ring fixedly arranged on the inner wall of the insulating cover, the inner wall of the cover ring is fixedly connected with a positioning outer cover, the inner wall of the positioning outer cover is fixedly connected with a reinforcing ring, and the inner wall of the reinforcing ring is fixedly provided with a groove sleeve, and the outer wall of the groove sleeve is fixedly provided with a connecting ring. According to the utility model, the uniform covering and pressing assembly is adopted, and when the circuit breaker terminal discharges in the discharge groove, the connecting ring supports the groove sleeve, so that the discharge of the outer wall of the groove sleeve can realize covering and pressing protection through the cover ring, the insulating cover and the ring cover, thereby greatly reducing the partial discharge amount of the circuit breaker of the electrical cabinet, and improving the voltage-withstanding and insulating strength.

Description

Technical Field

[0001] The utility model relates to the technical field of electric field uniformity, and more specifically, to an electric field uniformity structure for reducing the amount of local discharge. Background Art

[0002] The primary purpose of electric field equalization structures for minimizing partial discharge on circuit breakers is to improve their performance and safety. Partial discharge typically occurs in areas of high electric field intensity, which can be unevenly distributed due to improper design or manufacturing defects. Electric field equalization structures can improve the electric field distribution and reduce the occurrence of high-field intensity areas.

[0003] A search of existing published literature revealed that patent publication number CN215933471U discloses a circuit breaker main circuit. This homogenization structure utilizes a main circuit power assembly, including a bracket shielding ring, an arc-extinguishing contact seat, and a bracket shielding ring, to uniformize the surrounding electric field. This technology primarily optimizes the existing main circuit structure of circuit breakers used with sulfur hexafluoride, improves processing requirements, rounds corners and edges, and polishes the surface. It also designs specialized arc-extinguishing chamber contacts and electric field equalizing accessories, enabling the environmentally friendly circuit breaker to achieve the same performance as a circuit breaker used with sulfur hexafluoride without the use of epoxy resin or insulating plates. However, this homogenization structure has the following drawbacks:

[0004] When the homogenized structure performs partial discharge of the electric field, it is difficult to provide uniform control and reduce the discharge amount due to the wider discharge range and larger discharge amount. This will increase the partial discharge amount of the electrical cabinet circuit breaker and reduce the withstand voltage strength. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides an electric field uniformization structure for reducing the amount of local discharge, including a support plate, a ring cover and an insulating cover, the ring cover is fixedly connected to one side of the support plate, the insulating cover is fixedly connected to one side of the ring cover, and the inner wall of the insulating cover is provided with a uniform covering and pressing assembly; the uniform covering and pressing assembly includes a cover ring fixedly arranged on the inner wall of the insulating cover, and the inner wall of the ring cover is fixedly connected to a positioning outer cover, the inner wall of the positioning outer cover is fixedly connected to a reinforcement ring, the inner wall of the reinforcement ring is fixedly installed with a groove sleeve, the outer wall of the groove sleeve is fixedly installed with a connecting ring, and a connecting block is fixedly installed at one end of the groove sleeve.

[0006] Preferably, the ring cover and the insulating cover are both made of ceramic material, and the cover ring is made of ceramic material, the vertical cross-section of the reinforcement ring is circular, and one side of the reinforcement ring is made of rounded material, one side of the connecting block is fixedly connected with a support bar, the support bar and the connecting block are both made of copper material, and a discharge groove is provided on the inner wall of the groove sleeve.

[0007] When the present technical solution is in use, the connecting block supports the slot sleeve, and the inside of the slot sleeve can be connected to the terminal of the circuit breaker. When the circuit breaker terminal discharges inside the discharge slot, the ring cover supports and positions the outer cover, and the connecting ring supports the slot sleeve at the same time. The slot sleeve can achieve external uniformity to prevent outward expansion, so that the discharge of the outer wall of the slot sleeve can be protected by the cover ring, the insulating cover and the ring cover.

[0008] Preferably, a docking ring is provided on the inner wall of the support plate near its four corner lines, and a positioning assembly is provided inside the docking ring; the positioning assembly includes a rubber ring fixedly arranged on the inner wall of the docking ring, and the positioning assembly also includes two plug-in lower blocks, two positioning holes, two plug-in upper blocks and two docking holes; the two plug-in lower blocks are both located below the rubber ring, and the two plug-in lower blocks are fixedly connected to the support plate, and the two positioning holes are respectively opened on the inner walls of the two plug-in lower blocks; the two plug-in upper blocks are located above the ring cover, and the two plug-in upper blocks are fixedly connected to the support plate, and the two docking holes are respectively opened on the inner walls of the two plug-in upper blocks, the vertical cross-section of the rubber ring is a circular ring, and the rubber ring is made of rubber material, the two plug-in lower blocks are symmetrically arranged about the middle of the support plate, and the upper surfaces of the two plug-in lower blocks are in the same plane.

[0009] During use, the support plate drives the two upper plug-in blocks into the holes of the circuit breaker. Simultaneously, the circuit breaker's screws are inserted into the docking holes. The support plate drives the multiple docking rings to move, and the rubber rings follow the circuit breaker's positioning posts to achieve plug-in positioning. The lower plug-in block is inserted into the hole of the circuit breaker, and other screws are inserted into the positioning holes within the lower plug-in block.

[0010] The technical effects and advantages of this utility model are:

[0011] 1. The utility model adopts a uniform cover pressure assembly, a connecting block supports the groove sleeve, and the interior of the groove sleeve can be connected to the terminal of the circuit breaker. When the circuit breaker terminal discharges inside the discharge groove, the support plate supports the ring cover, and the connecting ring supports the groove sleeve. In this way, the groove sleeve can achieve external uniformity to prevent outward expansion. In this way, the discharge of the outer wall of the groove sleeve can be protected by the cover ring, the insulating cover and the ring cover, thereby significantly reducing the partial discharge of the electrical cabinet circuit breaker and improving the strength of the withstand voltage insulation.

[0012] 2. The utility model adopts a positioning component. The support plate drives the two plug-in upper blocks to be inserted into the holes of the circuit breaker, and the plug-in upper blocks and the circuit breaker are positioned and installed. The support plate drives multiple docking rings to move, and the rubber rings are plugged and positioned along the positioning columns of the circuit breaker. The plug-in lower block is inserted into the hole of the circuit breaker, and the two plug-in lower blocks are docked and installed with the circuit breaker. Multi-point rapid positioning and installation are achieved, and the installation efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main structure of the electric field uniformization structure for reducing partial discharge in the present invention.

[0014] Figure 2 This is a schematic diagram of the vertical cross-section of the electric field uniformization structure for reducing partial discharge in the present invention.

[0015] Figure 3 This is a schematic diagram of the partial structure of the connection between the ring cover and the insulating cover of the present invention.

[0016] Figure 4 This is a schematic diagram of the main partial structure of the connection between the ring cover and the insulating cover of the utility model.

[0017] Figure 5 This is a rear view schematic diagram of the electric field uniformization structure for reducing partial discharge in the present invention.

[0018] The accompanying drawings are marked as follows: 1. support plate; 2. ring cover; 3. insulating cover; 4. cover ring; 5. positioning outer cover; 6. reinforcement ring; 7. groove sleeve; 8. connecting ring; 9. connecting block; 10. support bar; 11. discharge groove; 12. docking ring; 13. rubber ring; 14. plug-in lower block; 15. positioning hole; 16. plug-in upper block; 17. docking hole. DETAILED DESCRIPTION

[0019] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0020] As attached Figure 1-5 An electric field uniformization structure for reducing partial discharge is shown. The electric field uniformization structure for reducing partial discharge is provided with a uniform cover pressure component. The setting of the uniform cover pressure component enables the discharge on the outer wall of the groove sleeve 7 to be protected by the cover ring 4, the insulating cover 3 and the ring cover 2, thereby significantly reducing the partial discharge of the electrical cabinet circuit breaker and improving the strength of the withstand voltage insulation. The specific structural setting of the uniform cover pressure component is as follows.

[0021] In this embodiment, as shown in the attached Figure 1-4As shown, the device comprises a support plate 1, an annular cover 2, and an insulating cover 3. The annular cover 2 is fixedly connected to one side of the support plate 1, and the insulating cover 3 is fixedly connected to one side of the annular cover 2. The inner wall of the insulating cover 3 is provided with a uniform pressure assembly. The uniform pressure assembly includes a cover ring 4 fixedly mounted on the inner wall of the insulating cover 3. A positioning cover 5 is fixedly connected to the inner wall of the annular cover 2. A reinforcement ring 6 is fixedly connected to the inner wall of the positioning cover 5. A groove sleeve 7 is fixedly mounted on the inner wall of the reinforcement ring 6. A connecting ring 8 is fixedly mounted on the outer wall of the groove sleeve 7. A connecting block 9 is fixedly mounted on one end of the groove sleeve 7. The annular cover 2 and the insulating cover 3 are both made of ceramic, and the cover ring 4 is also made of ceramic. The vertical cross-section of the reinforcement ring 6 is circular, and one side of the reinforcement ring 6 is rounded. A support bar 10 is fixedly connected to one side of the connecting block 9. The inner wall of the groove sleeve 7 is provided with a discharge groove 11. The support bar 10 and the connecting block 9 are both made of copper.

[0022] When the electric field uniformization structure of the present technical solution for reducing the amount of local discharge is used, the connecting block 9 is supported by the support bar 10, the connecting block 9 supports the groove sleeve 7, and the inside of the groove sleeve 7 can be connected to the terminal of the circuit breaker. When the circuit breaker terminal discharges inside the discharge groove 11, the ring cover 2 is supported by the support plate 1, the ring cover 2 supports the positioning outer cover 5, the positioning outer cover 5 supports the groove sleeve 7, and the connecting ring 8 supports the groove sleeve 7 at the same time, so that the groove sleeve 7 can achieve external uniformity to prevent outward expansion. At the same time, the support plate 1 supports the ring cover 2, the ring cover 2 supports the insulating cover 3, and the insulating cover 3 supports the cover ring 4, so that the discharge of the outer wall of the groove sleeve 7 can be covered and protected by the cover ring 4, the insulating cover 3 and the ring cover 2.

[0023] In this embodiment, as shown in the attached Figure 1-5 As shown, a docking ring 12 is provided on the inner wall of the support plate 1 near its four corners. A positioning assembly is provided within the docking ring 12. The positioning assembly includes a rubber ring 13 fixedly mounted on the inner wall of the docking ring 12. The positioning assembly also includes two plug-in lower blocks 14, two positioning holes 15, two plug-in upper blocks 16, and two docking holes 17. The two plug-in lower blocks 14 are located below the rubber ring 13 and are fixedly connected to the support plate 1. The two positioning holes 15 are respectively provided on the inner walls of the two plug-in lower blocks 14. The two plug-in upper blocks 16 are located above the ring cover 2 and are fixedly connected to the support plate 1. The two docking holes 17 are respectively provided on the inner walls of the two plug-in upper blocks 16. The rubber ring 13 has a circular cross-section and is made of rubber. The two plug-in lower blocks 14 are symmetrically arranged about the center of the support plate 1, and the upper surfaces of the two plug-in lower blocks 14 are in the same plane.

[0024] In this technical solution, the support plate 1 moves, driving the two upper plug-in blocks 16 to be inserted into the holes of the circuit breaker. At the same time, the circuit breaker's screws can be inserted into the docking holes 17, thereby positioning the upper plug-in blocks 16 and the circuit breaker. The support plate 1 also drives the multiple docking rings 12 to move, which in turn drive the rubber rings 13 to move. The rubber rings 13 are then positioned along the positioning posts of the circuit breaker. Simultaneously, the support plate 1 drives the two lower plug-in blocks 14 to move, which are inserted into the holes of the circuit breaker. Other screws are then inserted into the positioning holes 15 inside the lower plug-in blocks 14.

[0025] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electric field uniformization structure for reducing partial discharge, comprising a support plate (1), a ring cover (2), and an insulating cover (3), wherein the ring cover (2) is fixedly connected to one side of the support plate (1), and the insulating cover (3) is fixedly connected to one side of the ring cover (2), characterized in that: The inner wall of the insulating cover (3) is provided with a uniform covering and pressing component; The uniform covering assembly comprises a cover ring (4) fixedly arranged on the inner wall of the insulating cover (3), and the inner wall of the ring cover (2) is fixedly connected to a positioning outer cover (5), the inner wall of the positioning outer cover (5) is fixedly connected to a reinforcement ring (6), and the inner wall of the reinforcement ring (6) is fixedly installed with a groove sleeve (7) A connecting ring (8) is fixedly mounted on the outer wall of the groove sleeve (7), and a connecting block (9) is fixedly mounted on one end of the groove sleeve (7).

2. The electric field uniformization structure for reducing partial discharge according to claim 1, characterized in that: The ring cover (2) and the insulating cover (3) are both made of ceramic material, and the cover ring (4) is also made of ceramic material.

3. The electric field uniformization structure for reducing partial discharge according to claim 1, characterized in that: The vertical cross-section of the reinforcement ring (6) is in the shape of a circular ring, and one side of the reinforcement ring (6) is made of a rounded material.

4. The electric field uniformization structure for reducing partial discharge according to claim 1, characterized in that: A support bar (10) is fixedly connected to one side of the connecting block (9), the support bar (10) and the connecting block (9) are both made of copper, and a discharge groove (11) is provided on the inner wall of the groove sleeve (7).

5. The electric field uniformization structure for reducing partial discharge according to claim 1, characterized in that: The inner wall of the support plate (1) and the positions near the four corner lines thereof are all provided with docking rings (12), and the interior of the docking rings (12) is provided with positioning components; The positioning assembly includes a rubber ring (13) fixedly arranged on the inner wall of the docking ring (12), and the positioning assembly also includes two plug-in lower blocks (14), two positioning holes (15), two plug-in upper blocks (16) and two docking holes (17); The two plug-in lower blocks (14) are both located below the rubber ring (13), the two plug-in lower blocks (14) are both fixedly connected to the support plate (1), and the two positioning holes (15) are respectively opened on the inner walls of the two plug-in lower blocks (14); The two plug-in upper blocks (16) are located above the ring cover (2), and the two plug-in upper blocks (16) are fixedly connected to the support plate (1). The two docking holes (17) are respectively opened on the inner walls of the two plug-in upper blocks (16).

6. The electric field uniformization structure for reducing partial discharge according to claim 5, characterized in that: The vertical cross-section of the rubber ring (13) is in the shape of a circular ring, and the rubber ring (13) is made of rubber material.

7. The electric field uniformization structure for reducing partial discharge according to claim 5, characterized in that: The two plug-in lower blocks (14) are symmetrically arranged about the middle of the support plate (1), and the upper surfaces of the two plug-in lower blocks (14) are in the same plane.

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