A circuit breaker switch shield

Abstract

This utility model relates to a circuit breaker switch shielding cover, comprising two symmetrically arranged shielding support covers with a distance between them, forming a cavity for installing the circuit breaker switch transmission assembly. Each shielding support cover includes a cover body, a spindle hole, bolt fastening holes, a fixed support, and a star-shaped reinforcing rib assembly. The spindle hole is located on the upper part of the cover body for installing the circuit breaker switch spindle. The bolt fastening holes are located in the middle of the cover body for installing the transmission cam of the circuit breaker switch transmission assembly. The fixed support is located at the bottom of the cover body for fixed connection to the circuit breaker to form an integral support. The star-shaped reinforcing rib assembly is located on the inner wall of the cover body and connects to the spindle hole, bolt fastening holes, and fixed support. The shielding cover of this utility model can effectively uniformize the electric field, meet the insulation level of 24kV clean air, and simultaneously provide support for the spindle and cam. Assembly is simple and easy to operate.

Description

Technical Field

[0001] This utility model relates to the field of electrical switchgear technology, and in particular to a circuit breaker switch shielding cover. Background Technology

[0002] With increasing environmental awareness and increasingly stringent regulations, the power industry is largely replacing traditional SF6 gas as the insulating medium with dry air. While SF6 has excellent insulation properties, its extremely high global warming potential (GWP) has spurred the development of environmentally friendly alternatives such as clean air. Although clean air is environmentally friendly, its insulation performance is weaker than SF6. As a key piece of equipment in medium and low voltage power systems, the internal insulation performance of ring main units (RNBs) also needs to be guaranteed. The shielding cover plays a crucial role in the RNB's gas box, improving electrode shape and gaps, optimizing the internal magnetic field environment, enhancing electric field performance, ensuring the insulation level within the gas box, and enabling the safe and long-term operation of electrical equipment.

[0003] Most conventional shielding covers meet the insulation level of 12kV, but cannot meet the insulation level of 24kV clean air. Due to differences in size and distribution, the uniform electric field and the transmission capacity of the supporting cam are limited.

[0004] Therefore, this utility model proposes a circuit breaker switch shielding cover to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a circuit breaker switch shield that can meet the insulation level of 24kV clean air and support cam drive.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a circuit breaker switch shielding cover, the innovation of which is: it includes two symmetrically arranged shielding support covers, with a distance between the two shielding support covers, and they cooperate to form a cavity for installing the circuit breaker switch transmission assembly;

[0007] The shielding support cover includes:

[0008] A cover, wherein the cover is vertically arranged;

[0009] The main spindle hole is located on the upper part of the cover and is used to install the circuit breaker switch main spindle;

[0010] Bolt fastening holes are located in the middle of the cover and are used to install the transmission cam of the circuit breaker switch transmission assembly.

[0011] A fixed support is provided at the bottom of the cover and is used to be fixedly connected to the circuit breaker to form an integral support.

[0012] The cross-shaped reinforcing rib assembly is disposed on the inner wall of the cover and connected to the main shaft hole, bolt fastening hole and fixed support.

[0013] Furthermore, the cover includes a flat plate portion and a side plate portion. The central outline of the flat plate portion is waist-shaped, and the central part of the bottom edge of the flat plate portion curves upward to form an arc-shaped recess. The side plate portion surrounds the edge of the flat plate portion and is perpendicular to the flat plate portion and connected to the flat plate portion through a rounded corner transition portion.

[0014] Furthermore, a U-shaped groove is opened on each side of the lower part of the cover. The U-shaped grooves are opened on the side plate. The U-shaped grooves on the same side of the two shielding support covers cooperate with each other to form an observation window for observing the circuit breaker switch transmission assembly.

[0015] Furthermore, there are two fixed supports, which are respectively arranged on both sides of the arc-shaped recess. The fixed supports are located below the U-shaped groove on the same side, and the bottom of the fixed supports has mounting holes for connecting circuit breakers.

[0016] Furthermore, the bolt fastening holes are in two sets and are respectively located on both sides below the main shaft hole. Each set of bolt fastening holes has several bolt fastening holes, and the bolt fastening holes of the two sets of bolt fastening holes correspond one-to-one.

[0017] The cross-shaped reinforcing rib assembly includes an arc-shaped reinforcing rib, a first vertical reinforcing rib, a second horizontal reinforcing rib, a third diagonal reinforcing rib, a fourth vertical reinforcing rib, a fifth horizontal reinforcing rib, a sixth diagonal reinforcing rib, and a seventh diagonal reinforcing rib.

[0018] The arc-shaped reinforcing rib is one in number and is located at the edge of the arc-shaped recess in the flat plate. Both ends of the arc-shaped reinforcing rib are connected to the fixed support on the same side.

[0019] The first vertical reinforcing rib is one in number, with one end connected to the top of the main shaft hole and the other end connected to the rounded corner transition portion;

[0020] The second transverse reinforcing rib has two parts, which are respectively arranged on both sides of the main shaft hole. One end of the second transverse reinforcing rib is connected to the main shaft hole, and the other end is connected to the rounded transition part.

[0021] There are two third oblique reinforcing ribs, which are respectively arranged on both sides of the bottom of the main shaft hole. One end of the third oblique reinforcing rib is connected to the main shaft hole, and the other end is connected to the bolt fastening hole at the top on the same side.

[0022] The fourth vertical reinforcing rib is one, one end of which is connected to the bottom of the main shaft hole, and the other end passes through the two sets of bolt fastening holes and is connected to the arc-shaped reinforcing rib.

[0023] The fifth transverse reinforcing rib has several parts, and the two ends of the fifth transverse reinforcing rib are respectively connected to the bolt fastening holes corresponding to the two sets of bolt fastening holes.

[0024] The sixth oblique reinforcing rib has two parts, which are respectively arranged on both sides of the fourth vertical reinforcing rib. One side of the sixth oblique reinforcing rib is connected to each bolt fastening hole on the same side, and the other end is connected to the arc-shaped reinforcing rib.

[0025] There are two seventh oblique reinforcing ribs, which are respectively arranged on both sides of the fourth vertical reinforcing rib. The seventh oblique reinforcing rib is located on the side of the sixth oblique reinforcing rib away from the fourth vertical reinforcing rib on the same side. One end of the seventh oblique reinforcing rib is connected to the bolt fastening hole at the bottom on the same side, and the other end is connected to the fixed support on the same side.

[0026] Furthermore, the shielding support cover has a symmetrical structure about the vertical plane containing the central axis of the spindle hole.

[0027] Furthermore, the shielding support cover is integrally molded.

[0028] The advantages of this utility model are:

[0029] The shielding cover of this utility model is designed as two symmetrically arranged shielding support covers to prevent eddy current reactions. The main shaft hole, bolt fastening hole and fixed support are designed on each shielding support cover to adjust the electric field distribution around the shielding cover, so as to achieve a good uniform electric field and meet the insulation level of 24kV clean air. At the same time, it provides support for the main shaft and cam. The assembly is simple and easy to operate. During the assembly process, the status of the disconnect switch overtravel cylinder can be observed.

[0030] The cover of this utility model is designed with a waistline shape in the middle of the flat plate section, and the bottom edge of the flat plate section is bent upward to form an arc-shaped recess, which cooperates with the side plate section, effectively improving the structural strength of the middle and bottom of the cover.

[0031] This invention utilizes U-shaped grooves on both sides of each shielding support cover to form observation windows, facilitating the observation of whether the movement of the circuit breaker switch transmission assembly is normal.

[0032] The present invention has two fixed supports, which are respectively set on both sides of the arc-shaped recess. This design forms a double support point when the shield is fixedly connected to the circuit breaker, which effectively improves the vibration resistance of the shield and avoids displacement due to vibration.

[0033] The cross-shaped reinforcing rib assembly of this utility model optimizes the distribution of each reinforcing rib to form a cross-shaped reinforcing rib network, thereby achieving multi-directional stress support and effectively improving the resistance to electric arc impact deformation.

[0034] The shielding support cover of this utility model has a symmetrical structure about the vertical plane where the central axis of the main shaft hole is located, which disperses the mechanical stress generated by the electric arc impact to both sides, improves the resistance to deformation, and effectively reduces the risk of discharge caused by local field strength concentration.

[0035] The shielding support cover of this invention is integrally cast, which has high strength and good thermal conductivity, avoiding the splicing gaps of traditional split structures and effectively reducing the risk of electromagnetic leakage. Attached Figure Description

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0037] Figure 1 This is a schematic diagram of the shielding support cover of this utility model.

[0038] Figure 2 This is a front view of the shielding support cover of this utility model.

[0039] Figure 3 This is an axial cross-sectional view of the shielding support cover of this utility model.

[0040] Figure 4 This is a schematic diagram of the circuit breaker switch transmission assembly of this utility model installed inside the shielding cover. Detailed Implementation

[0041] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0042] Example

[0043] This embodiment provides a circuit breaker switch shielding cover, such as Figure 1-4 As shown, it includes two symmetrically arranged shielding support covers, with a distance between the two shielding support covers, which cooperate to form a cavity for installing the circuit breaker switch drive assembly 7.

[0044] The shielding support cover includes a cover body 1, a main shaft hole 2, bolt fastening holes 4, a fixed support 5, and a cross-shaped reinforcing rib assembly 3.

[0045] The cover 1 is vertically arranged and includes a flat plate portion 11 and a side plate portion 12. To improve the structural strength of the cover 1, the central outline of the flat plate portion 11 is waist-shaped, and the bottom edge of the flat plate portion 11 curves upward to form an arc-shaped recess 14. The side plate portion 12 surrounds the edge of the flat plate portion 11 and is vertically arranged with the flat plate portion 11 and connected to the flat plate portion 11 through a rounded corner transition portion 13. A U-shaped groove 15 is opened on each of the two sides of the lower part of the cover 1. The U-shaped grooves 15 are opened on the side plate portion 12. The U-shaped grooves 15 on the same side of the cover 1 of the two shielding support covers cooperate to form an observation window 6 for observing the circuit breaker switch transmission assembly 7, so as to facilitate the observation of whether the movement of the circuit breaker switch transmission assembly 7 is normal.

[0046] The spindle hole 2 is located on the upper part of the cover 1 and is used to install the circuit breaker switch spindle.

[0047] Bolt fastening holes 4 are located at the waistline position in the middle of the cover and are used to install the transmission cam of the circuit breaker switch transmission assembly 7. In this embodiment, there are two sets of bolt fastening holes 4, namely two bolt fastening hole groups. The two bolt fastening hole groups are respectively located on both sides below the main shaft hole 2. Each set of bolt fastening holes has two bolt fastening holes, one of which is located below the other bolt fastening hole on the side near the middle of the cover. The bolt fastening holes of the two sets of bolt fastening holes correspond one-to-one, that is, the two bolt fastening holes of one set of bolt fastening holes correspond one-to-one with the two bolt fastening holes of the other set of bolt fastening holes. Two pairs of bolt fastening holes are formed by corresponding pairs of the four bolt fastening holes.

[0048] Fixed supports 5 are located at the bottom of the cover 1 and are used to fix the cover to the circuit breaker to form an overall support. In this embodiment, there are two fixed supports 5, which are respectively located on both sides of the arc-shaped recess 14. The fixed supports 5 are located below the U-shaped groove 15 on the same side. The bottom of the fixed supports 5 has mounting holes 51 for connecting the circuit breaker. This design forms a double support point when the shielding cover is fixedly connected to the circuit breaker through the fixed supports 5, which effectively improves the vibration resistance of the shielding cover and avoids displacement due to vibration.

[0049] The star-shaped reinforcing rib assembly 3 is disposed on the inner wall of the cover 1 and is connected to the main shaft hole 2, the bolt fastening hole 4, and the fixed support 5. In this embodiment, the star-shaped reinforcing rib assembly 3 includes an arc-shaped reinforcing rib 38, a first vertical reinforcing rib 31, a second horizontal reinforcing rib 32, a third oblique reinforcing rib 33, a fourth vertical reinforcing rib 34, a fifth horizontal reinforcing rib 35, a sixth oblique reinforcing rib 36, and a seventh oblique reinforcing rib 37.

[0050] One arc-shaped reinforcing rib 38 is provided at the edge of the arc-shaped recess 14 in the flat plate portion 11, and both ends of the arc-shaped reinforcing rib 38 are connected to the fixed support 5 on the same side. One first vertical reinforcing rib 31 is provided and is vertically arranged. One end of the first vertical reinforcing rib 31 is connected to the top side wall of the main shaft hole 2, and the other end is connected to the rounded transition portion 13. Two second horizontal reinforcing ribs 32 are provided and are horizontally arranged on both sides of the main shaft hole 2. One end of the second horizontal reinforcing rib 32 is connected to the main shaft hole 2, and the other end is connected to the rounded transition portion 13. Two third oblique reinforcing ribs 33 are provided and are obliquely arranged on both sides of the bottom of the main shaft hole 2. One end of the third oblique reinforcing rib 33 is connected to the main shaft hole 2, and the other end is connected to the uppermost bolt fastening hole 4 on the same side. One fourth vertical reinforcing rib 34 is provided and is vertically arranged. One end of the fourth vertical reinforcing rib 34 is connected to the bottom of the main shaft hole 2, and the other end passes through the two sets of bolt fastening holes and is connected to the arc-shaped reinforcing rib 14. There are two fifth transverse reinforcing ribs 35, each corresponding to one of the two bolt fastening holes. Both ends of each fifth transverse reinforcing rib 35 are connected to the two bolt fastening holes of the corresponding bolt fastening hole pair. The middle of each fifth transverse reinforcing rib 35 is connected to the fourth vertical reinforcing rib 34. There are two sixth oblique reinforcing ribs 36, each obliquely positioned on both sides of the fourth vertical reinforcing rib 34. One side of each sixth oblique reinforcing rib 36 is connected to the two bolt fastening holes of the bolt fastening hole group on the same side, and the other end is connected to the arc-shaped reinforcing rib 38. There are two seventh oblique reinforcing ribs 37, each positioned on both sides of the fourth vertical reinforcing rib 34. The seventh oblique reinforcing rib 37 is located on the side of the sixth oblique reinforcing rib 36 away from the fourth vertical reinforcing rib 34. One end of each seventh oblique reinforcing rib 37 is connected to the lowest bolt fastening hole on the same side, and the other end is connected to the fixed support 5 on the same side. The star-shaped reinforcing rib assembly, by optimizing the distribution of each reinforcing rib to form a star-shaped intersecting rib network, achieves multi-directional stress support and effectively improves the resistance to arc impact deformation.

[0051] In this embodiment, the shielding support cover has a symmetrical structure about the vertical plane where the central axis of the main shaft hole 2 is located, which disperses the mechanical stress generated by the electric arc impact to both sides, improves the resistance to deformation, and effectively reduces the risk of discharge caused by local field strength concentration; in addition, the shielding support cover is integrally cast, with high strength and good thermal conductivity, avoiding the splicing gap of traditional split structures, which can effectively reduce the risk of electromagnetic leakage.

[0052] The shielding cover is designed as two symmetrically arranged shielding support covers to prevent eddy current reactions. Each shielding support cover is designed with a spindle hole, bolt fastening hole and fixed support, so that the electric field distribution around the shielding cover is adjusted and the electric field can be well uniformized to meet the insulation level of 24kV clean air. At the same time, it provides support for the spindle and cam, and is simple to assemble and operate. During the assembly process, the status of the disconnect switch overtravel cylinder can be observed.

[0053] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A circuit breaker switch shield characterized by: It includes two symmetrically arranged shielding support covers, with a distance between the two shielding support covers, which cooperate to form a cavity for installing the circuit breaker switch drive assembly; The shielding support cover includes: A cover, wherein the cover is vertically arranged; The main spindle hole is located on the upper part of the cover and is used to install the circuit breaker switch main spindle; Bolt fastening holes are located in the middle of the cover and are used to install the transmission cam of the circuit breaker switch transmission assembly. A fixed support is provided at the bottom of the cover and is used to be fixedly connected to the circuit breaker to form an integral support. The cross-shaped reinforcing rib assembly is disposed on the inner wall of the cover and connected to the main shaft hole, bolt fastening hole and fixed support.

2. The circuit breaker switch shield of claim 1, wherein: The cover includes a flat plate and a side plate. The central outline of the flat plate is waist-shaped, and the bottom edge of the flat plate curves upward to form an arc-shaped recess. The side plate surrounds the edge of the flat plate and is perpendicular to the flat plate, and is connected to the flat plate through a rounded corner transition.

3. The circuit breaker switch shield of claim 2, wherein: A U-shaped groove is opened on each side of the lower part of the cover. The U-shaped grooves are opened on the side plate. The U-shaped grooves on the same side of the two shielding support covers cooperate with each other to form an observation window for observing the circuit breaker switch transmission assembly.

4. The circuit breaker screen cover of claim 3, wherein: The fixed support has two parts, which are respectively arranged on both sides of the arc-shaped recess. The fixed support is located below the U-shaped groove on the same side, and the bottom of the fixed support has a mounting hole for connecting the circuit breaker.

5. The circuit breaker screen cover of claim 4, wherein: The bolt fastening holes are in two sets and are respectively located on both sides below the main shaft hole. Each set of bolt fastening holes has several bolt fastening holes, and the bolt fastening holes of the two sets of bolt fastening holes correspond one-to-one. The cross-shaped reinforcing rib assembly includes an arc-shaped reinforcing rib, a first vertical reinforcing rib, a second horizontal reinforcing rib, a third diagonal reinforcing rib, a fourth vertical reinforcing rib, a fifth horizontal reinforcing rib, a sixth diagonal reinforcing rib, and a seventh diagonal reinforcing rib. The arc-shaped reinforcing rib is one in number and is located at the edge of the arc-shaped recess in the flat plate. Both ends of the arc-shaped reinforcing rib are connected to the fixed support on the same side. The first vertical reinforcing rib is one in number, with one end connected to the top of the main shaft hole and the other end connected to the rounded corner transition portion; The second transverse reinforcing rib has two parts, which are respectively arranged on both sides of the main shaft hole. One end of the second transverse reinforcing rib is connected to the main shaft hole, and the other end is connected to the rounded transition part. There are two third oblique reinforcing ribs, which are respectively arranged on both sides of the bottom of the main shaft hole. One end of the third oblique reinforcing rib is connected to the main shaft hole, and the other end is connected to the bolt fastening hole at the top on the same side. The fourth vertical reinforcing rib is one, one end of which is connected to the bottom of the main shaft hole, and the other end passes through the two sets of bolt fastening holes and is connected to the arc-shaped reinforcing rib. The fifth transverse reinforcing rib has several parts, and the two ends of the fifth transverse reinforcing rib are respectively connected to the bolt fastening holes corresponding to the two sets of bolt fastening holes. The sixth oblique reinforcing rib has two parts, which are respectively arranged on both sides of the fourth vertical reinforcing rib. One side of the sixth oblique reinforcing rib is connected to each bolt fastening hole on the same side, and the other end is connected to the arc-shaped reinforcing rib. There are two seventh oblique reinforcing ribs, which are respectively arranged on both sides of the fourth vertical reinforcing rib. The seventh oblique reinforcing rib is located on the side of the sixth oblique reinforcing rib away from the fourth vertical reinforcing rib on the same side. One end of the seventh oblique reinforcing rib is connected to the bolt fastening hole at the bottom on the same side, and the other end is connected to the fixed support on the same side.

6. The circuit breaker screen cover of claim 5, wherein: The shielding support cover has a symmetrical structure about the vertical plane containing the central axis of the spindle hole.

7. The circuit breaker switch shield of claim 6, wherein: The shielding support cover is integrally cast.

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