Novel isolating knife static contact of circuit breaker
Through the hard link structure and the bending design of the copper bar, the assembly height problem caused by the soft connection between the isolation knife and the busbar in the existing circuit breaker is solved, and the assembly height is reduced without insulator support is achieved.
Patent Information
- Application Number
- CN202420876504.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2024-12-06
- Estimated Expiration
- 2034-04-25
AI Technical Summary
The isolation knife in the existing circuit breaker overlaps with the busbar through a soft connection, resulting in the need to add insulator support, which increases the assembly height and increases the cost. At the same time, a large gap is required for bolts to be screwed during assembly, which adds a circuit breaker. the actual height.
Adopt a hard link structure, plugged into the isolation cutter head through inserts, and connected to the busbar through hard link structure, combining the staggered design of the upper and lower bent parts of the copper row and the static contact seat, reducing the busbar and static contacts The distance between seats reduces the assembly height of the circuit breaker.
The busbar can be effectively supported without adding an insulator, which reduces the overall height of the circuit breaker, simplifies the assembly process and reduces costs.
Smart Images
Figure CN222126418U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a novel isolating knife static contact in the technical field of circuit breakers. Background Art
[0002] In the prior art, the isolating switch in the circuit breaker is connected to the main busbar by a flexible connection (such as Figure 1 As shown in the figure, the busbar is subjected to downward force. Insulators need to be installed between the busbar and the top of the gas box to support the busbar to prevent the busbar from bending downward due to its own weight and reducing the reliability between the busbar and the gas box. In addition, during assembly, since the connection between the flexible connection and the busbar is directly opposite to the top of the static contact, and the flexible connection and the busbar are connected by bolts, the vertical distance between the busbar and the static contact requires a larger gap to facilitate the tightening of the bolts, thereby increasing the actual assembly height of the circuit breaker in disguise. Utility Model Content
[0003] The utility model aims to provide a new type of isolating knife static contact of a circuit breaker, which adopts a hard link structure instead of a soft connection, so that there is no need to install an insulator for fixing between the busbar and the gas box, which reduces the cost and can effectively reduce the overall height of the circuit breaker.
[0004] To achieve the above-mentioned purpose, the utility model provides a new type of isolating knife static contact of a circuit breaker, including a static contact seat, which is arranged at the upper end of a frame, and a supporting structure is arranged at the upper end of the static contact seat. An insert is arranged in the static contact seat, and the end of the insert passes through the supporting structure and is connected to a hard connection structure, and the insert cooperates with the isolating knife head.
[0005] Compared with the prior art, the beneficial effect of the utility model lies in that the end of the insert is connected to the busbar through a hard connection structure by plugging the insert with the isolating blade head. The hard connection structure has high strength and can effectively support the busbar without the need to install additional insulators. Moreover, the connection between the hard connection structure and the busbar is not directly opposite to the top of the static contact seat, thereby reducing the distance between the busbar and the static contact seat, and effectively reducing the actual height of the circuit breaker assembly.
[0006] As a further improvement of the utility model, the supporting structure includes a top plate, which is arranged at the upper end of the static contact seat, the rear edge of the top plate is connected to the upper end of the static contact seat, and the remaining edges of the top plate are processed with edging, which is connected to the side plate of the static contact seat.
[0007] In this way, the upper end of the static contact seat is closed by the top plate, and the four sides are also surrounded by the edging of the top plate, and the edging is connected to the side plate of the static contact seat, so that the entire supporting structure is integrated with the upper end of the static contact seat, ensuring its structural strength and being able to stably support the hard connection structure and the busbar.
[0008] As a further improvement of the utility model, the insert includes a connecting plate, which is arranged on the inner wall of the static contact seat, and a plug plate is arranged at the rear of the connecting plate, which matches the isolating cutter head, and a fixed frustum is processed at the front end of the connecting plate, and the upper end of the fixed frustum passes through the top plate.
[0009] In this way, the insert is divided into three parts, namely the connecting plate, the plug plate and the fixed round table. The plug plate is plugged into the isolating blade head when it is closed, and the fixed round table is used to connect and fix the hard link, so that the isolating blade head can be connected to the busbar after closing.
[0010] As a further improvement of the present invention, the hard connection structure includes a copper busbar, an upper bending portion is processed on the upper part of the copper busbar, and a lower bending portion is processed on the lower part of the copper busbar. The upper bending portion is connected to the busbar, and the lower bending portion is connected to the fixed cone. The upper bending portion and the lower bending portion are arranged back to back to each other.
[0011] In this way, the copper busbar has a harder texture and high structural strength, and can well support the busbar. The upper bent portion and the lower bent portion are back to back with each other, so that the connection part between the upper bent portion and the busbar must be staggered with the top of the static contact seat, which is convenient for the installation of the bolts. Moreover, it is only necessary to retain the necessary safety distance between the busbar and the top of the static contact seat, effectively reducing the assembly height of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is an assembly diagram of a static contact and a busbar in the prior art.
[0013] Figure 2 It is an assembly diagram of the static contact and busbar of the utility model.
[0014] Figure 3 It is a structural schematic diagram of the static contact of the utility model.
[0015] Among them, 1 is the busbar, 2 is the flexible connector, 3 is the isolating blade, 4 is the static contact seat, 5 is the frame, 6 is the copper busbar, 7 is the fixed round table, 8 is the top plate, 9 is the edging, 10 is the connecting plate, and 11 is the plug-in plate. DETAILED DESCRIPTION
[0016] The utility model is further described below in conjunction with the accompanying drawings:
[0017] like Figure 2-3 A new type of isolating knife static contact of a circuit breaker shown in the figure includes a static contact seat 4, which is arranged at the upper end of a frame 5, and a supporting structure is arranged at the upper end of the static contact seat 4. An insert is arranged in the static contact seat 4, and the end of the insert passes through the supporting structure and is connected to the hard connection structure, and the insert cooperates with the isolating knife head 3.
[0018] The supporting structure includes a top plate 8, which is arranged at the upper end of the static contact seat 4, the rear edge of the top plate 8 is connected to the upper end of the static contact seat 4, and the remaining edges of the top plate 8 are processed with edging 9, which is connected to the side plate of the static contact seat 4.
[0019] The insert includes a connecting plate 10, which is arranged on the inner wall of the static contact seat 4. A plug plate 11 is arranged at the rear of the connecting plate 10, and the plug plate 11 matches the isolating cutter head 3. A fixed frustum 7 is processed at the front end of the connecting plate 10, and the upper end of the fixed frustum 7 passes through the top plate 8.
[0020] The hard connection structure includes a copper busbar 6, an upper bending portion is processed on the upper part of the copper busbar 6, and a lower bending portion is processed on the lower part of the copper busbar 6. The upper bending portion is connected to the busbar 1, and the lower bending portion is connected to the fixed truncated table 7. The upper bending portion and the lower bending portion are arranged back to back to each other.
[0021] In the utility model, the upper opening of the static contact seat 4 is closed by the top plate 8 and the edging 9 to form a good supporting platform. A connecting plate 10 is arranged on the inner wall of the static contact seat 4, and a plug plate 11 is arranged on the connecting plate 10. When the isolating knife switch and the static contact are closed, the plug plate 11 is plugged into the knife head of the isolating knife switch. A fixed truncated cone 7 is processed on the upper end of the connecting plate 10, and the fixed truncated cone 7 extends outward through the top plate 8. A screw hole is opened on the fixed truncated cone 7. The lower bending portion of the copper busbar 6 is connected to the fixed truncated cone 7 by bolts, and the upper bending portion of the copper busbar 6 is connected to the busbar 1 by bolts.
[0022] Since the upper bending portion and the lower bending portion are respectively disposed on the upper and lower parts of the copper busbar 6 and are back-to-back, the connection between the upper bending portion and the busbar 1 is staggered with the top plate 8, and the height of the copper busbar 6 itself is the safe height between the busbar 1 and the circuit breaker, which not only facilitates the bolted connection between the upper bending portion and the busbar 1, but also eliminates the need to additionally raise the height between the busbar 1 and the circuit breaker, thereby effectively reducing the assembly height of the circuit breaker. Since the copper busbar 6 itself is relatively hard and has high strength, it can directly and effectively support the busbar 1.
[0023] The utility model adopts the copper busbar 6 to replace the soft connection 2, so that no insulator for fixing is required between the busbar 1 and the gas box, which reduces the cost and can effectively reduce the overall height of the circuit breaker.
[0024] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed herein, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.
Claims
1. A new type of isolating knife static contact of a circuit breaker, comprising a static contact seat, the static contact seat is arranged at the upper end of a frame, and is characterized in that: A supporting structure is arranged at the upper end of the static contact seat, an insert is arranged inside the static contact seat, an end of the insert passes through the supporting structure and is connected to the hard connection structure, and the insert cooperates with the isolation cutter head.
2. The novel isolating blade static contact of a circuit breaker according to claim 1 is characterized in that: The supporting structure comprises a top plate, which is arranged at the upper end of the static contact seat, the rear edge of the top plate is connected to the upper end of the static contact seat, and the remaining edges of the top plate are processed with edging, which is connected to the side plates of the static contact seat.
3. The novel isolating blade static contact of a circuit breaker according to claim 2 is characterized in that: The insert includes a connecting plate, which is arranged on the inner wall of the static contact seat. A plug plate is arranged at the rear of the connecting plate, which matches the isolating cutter head. A fixed truncated cone is processed at the front end of the connecting plate, and the upper end of the fixed truncated cone passes through the top plate.
4. The novel isolating blade static contact of a circuit breaker according to claim 3 is characterized in that: The hard connection structure includes a copper busbar, an upper bending portion is processed on the upper part of the copper busbar, and a lower bending portion is processed on the lower part of the copper busbar. The upper bending portion is connected to the busbar, and the lower bending portion is connected to the fixed truncated table. The upper bending portion and the lower bending portion are arranged back to back to each other.