Isolation switch
The switchgear design addresses sharp-end discharge issues by using a connection axis with end caps and pressure springs to minimize external exposure, enhancing insulation performance and stability under high voltage.
Patent Information
- Application Number
- CN202422229222.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-11
AI Technical Summary
The tip of the spring in the isolating switch is prone to discharge in a high voltage environment, affecting the insulation performance of the power system.
An isolating switch is designed to reduce tip exposure by providing a pressure equalizing cover at both ends of the connecting shaft and an elastic member between the first and second blade switch plates, and a limiting ring and fixture are used to limit the position of the elastic member, thereby improving the contact method to reduce tip discharge.
Effectively reduce the tip discharge of the isolating switch, and improves the insulation and breaking stability between phases.
Smart Images
Figure CN223108761U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of switches, and particularly relates to a disconnector. Background Art
[0002] The disconnector plays a role of connecting and disconnecting in the power system. Currently, a spring is usually provided in the disconnector to increase the connectivity of the connection between components in the disconnector. However, the spring is usually arranged outside the disconnector. Since the spring itself has a tip part, in a high-voltage environment, the electric field distribution is relatively concentrated, and tip discharge is likely to occur. Tip discharge will seriously affect the insulation performance between phases in the power system. Summary of the Utility Model
[0003] The purpose of this application is to provide a disconnector, which can effectively reduce the occurrence of tip discharge in the disconnector and improve the insulation between phases in the power system.
[0004] Other features and advantages of this application will become apparent through the following detailed description, or be learned in part through the practice of this application.
[0005] According to one aspect of the embodiments of this application, this application provides a disconnector, which includes:
[0006] A mounting base, the mounting base includes a connecting part and a touching part arranged at intervals;
[0007] A connecting shaft, the connecting shaft is rotatably connected to the connecting part;
[0008] A knife switch, one end of the knife switch is rotatably connected to the connecting shaft, the knife switch rotates around the connecting shaft, the knife switch has a closing state connecting the touching part and a tripping state disengaging from the touching part, the knife switch includes a first knife blade and a second knife blade arranged opposite to each other, and an interval space is formed between the first knife blade and the second knife blade;
[0009] An elastic member, the elastic member is located in the interval space between the first knife blade and the second knife blade, and the elastic member presses against the first knife blade and the second knife blade;
[0010] Voltage equalizing covers, there are two voltage equalizing covers, and the two voltage equalizing covers are respectively arranged at the two axial ends of the connecting shaft.
[0011] In one aspect, the elastic member is a compression spring, and the elastic member is sleeved on the connecting shaft.
[0012] In one aspect, the disconnecting switch includes a limit ring sleeved on the connecting shaft. The limit ring is provided with a limit groove facing the elastic member, and the end of the elastic member is embedded in the limit groove.
[0013] In one aspect, there are two limit rings, and the two limit rings are respectively arranged at both ends of the elastic member.
[0014] In one aspect, the outer surface of the grading cover is an arc surface.
[0015] In one aspect, the connecting part includes a first connecting plate and a second connecting plate arranged oppositely. The first knife blade and the second knife blade are located between the first connecting plate and the second connecting plate, and the connecting shaft sequentially penetrates through the first connecting plate, the first knife blade, the second knife blade and the second connecting plate.
[0016] In one aspect, the disconnecting switch includes a fixing member and a limit projection. The fixing member is arranged at one end of the connecting shaft, and the limit projection is arranged at the other end of the connecting shaft and protrudes from the radial surface of the connecting shaft. Both the fixing member and the limit projection are arranged inside the grading cover.
[0017] In one aspect, an external thread is provided at one end of the connecting shaft, and the fixing member is threadedly connected to the external thread of the connecting shaft.
[0018] In one aspect, the grading cover is provided with a receiving cavity, and the grading cover is provided with a through opening corresponding to the connecting shaft. The through opening communicates with the receiving cavity.
[0019] In one aspect, the disconnecting switch further includes a connecting member. One end of the connecting member is connected to the first knife blade, and the other end of the connecting member is connected to the second knife blade. There are multiple connecting members, and the multiple connecting members are sequentially arranged in the direction away from the connecting shaft.
[0020] In this application, by arranging the grading covers at both axial ends of the connecting shaft to cover the ends of the connecting shaft, the situation where the tips of the disconnecting switch are exposed to the external environment is reduced. Moreover, in this application, the elastic member is arranged in the spaced space between the first knife blade and the second knife blade, which can also reduce the situation where the tip of the elastic member is exposed to the external environment of the disconnecting switch. It can be seen that the technical solution of this application can reduce the external tips of the disconnecting switch, and then reduce the tip discharge of the disconnecting switch.
[0021] It should be understood in this application that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Description of the Drawings
[0022] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0023] Figure 1 Schematically shows a structural diagram of the disconnecting switch of the present application.
[0024] Figure 2 Schematically shows a cross-sectional view of the disconnecting switch of the present application.
[0025] Figure 3 Schematically shows a structural diagram of the disconnecting switch of the present application in the closed state.
[0026] Figure 4 Schematically shows a structural diagram of the disconnecting switch of the present application in the open state.
[0027] Figure 5 Schematically shows a structural diagram of a connecting member provided on the disconnecting switch of the present application.
[0028] The description of the reference numerals is as follows:
[0029] 100, mounting base; 200, connecting shaft; 300, knife switch; 400, elastic member; 500, grading ring; 600, limiting ring; 700, fixing member; 800, limiting protrusion; 900, connecting member;
[0030] 110, connecting portion; 120, actuating portion; 310, first knife blade; 320, second knife blade; 610, limiting groove;
[0031] 111, first connecting plate; 112, second connecting plate; 511, through hole; 512, accommodating cavity. Detailed implementation manners
[0032] Now, the exemplary embodiments will be described more comprehensively with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the present application will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art.
[0033] Refer to Figures 1 to 4As shown in the figure, the present application provides a disconnecting switch, which includes: a mounting base 100, a connecting shaft 200, a knife switch 300, an elastic member 400, and a grading shield 500. The mounting base 100 is used to provide a mounting position, and the connecting shaft 200 and the knife switch 300 can be arranged on the mounting base 100.
[0034] The mounting base 100 includes a connecting portion 110 and a triggering portion 120 arranged at intervals; it can be understood that the mounting base 100 is divided into two structural components, namely the connecting portion 110 and the triggering portion 120. The connecting portion 110 and the triggering portion 120 are spaced apart from each other by a certain distance and are separately arranged.
[0035] The connecting shaft 200 is rotatably connected to the connecting portion 110; the connecting shaft 200 can rotate on the connecting portion 110. One end of the knife switch 300 is rotatably connected to the connecting shaft 200, and the knife switch 300 rotates around the connecting shaft 200. The knife switch 300 has a closing state in which it contacts the triggering portion 120 and a tripping state in which it disengages from the triggering portion 120. The knife switch 300 includes a first knife blade 310 and a second knife blade 320 arranged oppositely, and an interval space is formed between the first knife blade 310 and the second knife blade 320; the first knife blade 310 and the second knife blade 320 are relatively independently arranged, and the first knife blade 310 and the second knife blade 320 can rotate synchronously around the connecting shaft 200.
[0036] Refer to Figure 5 As shown in the figure, in order to ensure that the first knife blade 310 and the second knife blade 320 can rotate synchronously, the disconnecting switch further includes a connecting member 900. One end of the connecting member 900 is connected to the first knife blade 310, and the other end of the connecting member 900 is connected to the second knife blade 320. A plurality of connecting members 900 are provided, and the plurality of connecting members 900 are arranged in sequence in a direction away from the connecting shaft 200. That is, the connecting member 900 can be arranged at one end away from the connecting shaft 200, and the first knife blade 310 and the second knife blade 320 are fixed together through the connecting member 900.
[0037] Furthermore, a plurality of connecting members 900 can also be provided, and the plurality of connecting members 900 are arranged at intervals in sequence in a direction away from the connecting shaft 200 to maintain the integrity of the first knife blade 310 and the second knife blade 320.
[0038] When closing is required, rotate the knife switch 300 so that the knife switch 300 contacts the triggering portion 120. Thus, the connecting portion 110 and the triggering portion 120 are connected together through the knife switch 300 to complete closing, and the electrical signal can be conducted. When tripping is required, rotate the knife switch in the reverse direction again so that the knife switch 300 disengages from the contact with the triggering portion 120 to complete tripping, and the electrical signal cannot be conducted.
[0039] There may be two trigger parts 120, one corresponding to the first knife blade 310 and the other corresponding to the second knife blade 320. When closing, the first knife blade 310 contacts one trigger part 120, and the second knife blade 320 contacts the other trigger part 120.
[0040] The elastic member 400 is located in the spaced space between the first knife blade 310 and the second knife blade 320, and the elastic member 400 presses against the first knife blade 310 and the second knife blade 320. Thus, a pressing force can be applied to the first knife blade 310 and the second knife blade 320 through the elastic member 400 to ensure effective contact connection between the first knife blade 310 and the second knife blade 320 and the connecting portion 110, reduce the gap with the connecting portion 110, enable signals to flow smoothly between the knife blades and the trigger part 120, and improve the connection stability of the disconnecting switch.
[0041] It should be noted that when installing the elastic member 400, first compress the elastic member 400, and then place the compressed elastic member 400 between the first knife blade 310 and the second knife blade 320. The compressed elastic member 400 will generate a restoring force, and the restoring force of the elastic member 400 acts on the first knife blade 310 and the second knife blade 320, thereby pressing against the first knife blade 310 and the second knife blade 320, so that the first knife blade 310 and the second knife blade 320 have a tendency to move towards the connecting portion 110.
[0042] There are two grading hoods 500, and the two grading hoods 500 are respectively arranged at the axial two ends of the connecting shaft 200. The connecting shaft 200 passes through the connecting portion 110, and part of the connecting shaft 200 protrudes from the connecting portion 110, which is prone to tip discharge. By covering the protruding parts at both ends of the connecting shaft 200 with the grading hood 500, the situation that the end part of the connecting shaft 200 is exposed to the external environment is reduced. Especially in a high-voltage vacuum interrupter, the insulation performance can be improved through the grading hood 500, making its insulation performance stable and the opening and closing of the disconnecting switch stable.
[0043] In this embodiment, by arranging the grading hoods 500 at the axial two ends of the connecting shaft 200 to cover the end parts of the connecting shaft 200, the situation that the tips of the disconnecting switch are exposed to the external environment is reduced. Moreover, in this application, by arranging the elastic member 400 in the spaced space between the first knife blade 310 and the second knife blade 320, the situation that the tip of the elastic member 400 is exposed to the external environment of the disconnecting switch can also be reduced. It can be seen that the technical solution of this application can reduce the external tips of the disconnecting switch, and then reduce the tip discharge of the disconnecting switch.
[0044] In an embodiment of the present application, the elastic member 400 is a compression spring, and the elastic member 400 is sleeved on the connecting shaft 200. By sleeving the elastic member 400 on the connecting shaft 200, the elastic member 400 can apply pressure along the axial direction of the connecting shaft 200. Ensure that the pressure applied by the elastic member 400 can act vertically on the surfaces of the first knife blade 310 and the second knife blade 320, so as to realize the pressing of the first knife blade 310 and the second knife blade 320. Moreover, through the connecting shaft 200, a placement position for the compression spring can also be provided. By sleeving the compression spring on the connecting shaft 200, the convenience of setting the compression spring is improved.
[0045] Moreover, setting the compression spring between the first knife blade 310 and the second knife blade 320 can also be understood as hiding the compression spring in the interval space, thereby reducing the situation where the tip of the compression spring is exposed to the external environment outside the disconnect switch.
[0046] In another embodiment of the present application, the disconnect switch includes a limit ring 600. The limit ring 600 is sleeved on the connecting shaft 200 and is located at the end of the elastic member 400. The limit ring 600 can also rotate around the connecting shaft 200. The limit ring 600 has the function of further shielding the tip of the elastic member 400. Through the limit ring 600, the two ends of the elastic member 400 can be further blocked, and the tip discharge of the elastic member 400 is further reduced.
[0047] Furthermore, through the setting of the limit ring 600, the pressure magnitude applied by the elastic member 400 on the first knife blade 310 and the second knife blade 320 can also be dispersed. The original point contact of one end of the elastic member 400 with the knife blade is changed to a ring-shaped area contact with the knife blade. That is to say, around the connecting shaft 200, the knife blade can receive the pressure of the elastic member 400. That is, the original point contact of the force is adjusted to surface contact. The pressure received by the knife blade is more dispersed, and the situation of too concentrated acting force can also be avoided, so that the pressing force received by the knife blade is more uniform.
[0048] In an embodiment of the present application, the limit ring 600 is provided with a limit groove 610 facing the elastic member 400, and the end of the elastic member 400 is embedded in the limit groove 610. Through the setting of the limit groove 610, the tip of the elastic member 400 can be received, and the situation of the tip of the elastic member 400 being exposed is reduced. Moreover, the groove side wall of the limit groove 610 can also contact the elastic member 400, increasing the contact area between the limit ring 600 and the elastic member 400, making the contact between the elastic member 400 and the limit ring 600 more firm, and improving the transmission effect of the acting force.
[0049] In an embodiment of the present application, two limiting rings 600 are provided, and the two limiting rings 600 are respectively arranged at both ends of the elastic member 400. Both ends of the elastic member 400 have ends. In order to better reduce corona discharge, limiting rings 600 are provided at both ends of the elastic member 400.
[0050] Furthermore, the limiting ring 600 is arranged between the elastic member 400 and the knife blade. Through the limiting ring 600, the elastic member 400 can be further squeezed, increasing the deformation amount of the elastic member 400, and further increasing the pressing force of the elastic member 400 on the first knife blade 310 and the second knife blade 320.
[0051] In addition, the acting force of the elastic member 400 is transmitted to the knife blade through the limiting ring 600. The limiting ring 600 itself has a certain thickness, thereby being able to reduce the length of the elastic member 400 in the axial direction of the connecting shaft 200. When the elastic member 400 is relatively short, the pressing on the first knife blade 310 and the second knife blade 320 can be realized.
[0052] In an embodiment of the present application, the outer surface of the grading cover 500 is an arc surface. Through the setting of the arc surface, the outer surface of the grading cover 500 is made smoother, reducing the edges and corners of the grading cover 500, thereby reducing the corona discharge of the grading cover 500 itself. For example, the outer surface of the grading cover 500 can be hemispherical.
[0053] In an embodiment of the present application, the connecting portion 110 includes a first connecting plate 111 and a second connecting plate 112 arranged oppositely. The first knife blade 310 and the second knife blade 320 are located between the first connecting plate 111 and the second connecting plate 112. The connecting shaft 200 sequentially passes through the first connecting plate 111, the first knife blade 310, the second knife blade 320 and the second connecting plate 112. After the connecting shaft 200 passes through the connecting portion 110 and the knife blade respectively, there are also protruding parts on the first connecting plate 111 and the second connecting plate 112. The grading cover 500 can be arranged on the outside of the first connecting plate 111 and the second connecting plate 112. And it can be known that through the pressing of the elastic member 400, the first knife blade 310 can be made to abut against the first connecting plate 111, and the second knife blade 320 can be made to abut against the second connecting plate 112, improving the contact between the first knife blade 310 and the first connecting plate 111, and the contact between the second knife blade 320 and the second connecting plate 112.
[0054] And it can be known that there are at least two layers of structures separating the elastic member 400 from the external environment. The interval between one end of the elastic member 400 and the external environment is the first knife blade 310 and the first connecting plate 111, and the interval between the other end of the elastic member 400 and the external environment is the second knife blade 320 and the second connecting plate 112. Both ends of the elastic member 400 are protected by two layers of interval structures respectively, improving the isolation effect between the elastic member 400 and the external environment.
[0055] In an embodiment of the present application, the disconnecting switch includes a fixing member 700 and a limiting protrusion 800. The fixing member 700 is disposed at one end of the connecting shaft 200, and the limiting protrusion 800 is disposed at the other end of the connecting shaft 200 and protrudes from the radial surface of the connecting shaft 200. Both the fixing member 700 and the limiting protrusion 800 are disposed within the grading cover 500. The connecting shaft 200 can be limited within the connecting portion 110 by the limiting protrusion 800, reducing the left - right movement of the connecting shaft 200. The limiting protrusion 800 can surround the connecting shaft 200 in a circle.
[0056] For example, the connecting portion 110 is provided with corresponding mounting holes. When installing the connecting shaft 200, the connecting shaft 200 passes through the mounting holes. The diameter of the fixing member 700 is larger than the diameter of the mounting holes. After the limiting protrusion 800 is disposed on the connecting shaft 200, the diameter of the limiting protrusion 800 is also larger than the diameter of the mounting holes, so that the limiting protrusion 800 can be clamped on the mounting holes.
[0057] In an embodiment of the present application, an external thread is provided at one end of the connecting shaft 200, and the fixing member 700 is thread - connected to the external thread of the connecting shaft 200. For example, the fixing member 700 is a nut. The fixing member 700 is disposed on the connecting shaft 200, which can reduce the situation where the connecting shaft 200 disengages from the connecting portion 110. Through the combined action of the fixing member 700 and the limiting protrusion 800, the situation of the connecting shaft 200 moving back and forth is reduced.
[0058] In an embodiment of the present application, the grading cover 500 is provided with a receiving cavity 512, and the grading cover 500 is provided with a through - opening 511 corresponding to the connecting shaft 200. The through - opening 511 communicates with the receiving cavity 512. The grading cover 500 can be fixed to the connecting portion 110 in advance, and then the connecting shaft 200 is passed through the through - opening 511, and the fixing member 700 can also be installed through the through - opening 511.
[0059] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the utility model disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include known common general knowledge or conventional technical means in the technical field not disclosed in the present application.
[0060] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.
Claims
1. A disconnector, characterized in that, The disconnecting switch includes: A mounting base, which includes a connecting part and a triggering part arranged at intervals; A connecting shaft, which is rotatably connected to the connecting part; A knife switch, one end of which is rotatably connected to the connecting shaft, and the knife switch rotates around the connecting shaft. The knife switch has a closing state connecting the triggering part and a tripping state disengaging from the triggering part. The knife switch includes a first knife blade and a second knife blade arranged oppositely, and an interval space is formed between the first knife blade and the second knife blade; An elastic member, which is located in the interval space between the first knife blade and the second knife blade, and the elastic member presses against the first knife blade and the second knife blade; Equalizing covers, there are two equalizing covers, and the two equalizing covers are respectively arranged at the axial two ends of the connecting shaft.
2. The disconnecting switch according to claim 1, wherein, The elastic member is a compression spring, and the elastic member is sleeved on the connecting shaft.
3. The disconnecting switch according to claim 2, characterized in that, The disconnecting switch includes a limiting ring, the limiting ring is sleeved on the connecting shaft, the limiting ring is provided with a limiting groove facing the elastic member, and the end of the elastic member is embedded in the limiting groove.
4. The disconnector according to claim 3, characterized in that, There are two limiting rings, and the two limiting rings are respectively arranged at the two ends of the elastic member.
5. The disconnector according to claim 1, wherein The outer surface of the equalizing cover is an arc surface.
6. The disconnecting switch according to claim 1, characterized in that, The connecting part includes a first connecting plate and a second connecting plate arranged oppositely. The first knife blade and the second knife blade are located between the first connecting plate and the second connecting plate. The connecting shaft sequentially passes through the first connecting plate, the first knife blade, the second knife blade and the second connecting plate.
7. The disconnector according to claim 1, wherein, The disconnecting switch includes a fixing member and a limiting protrusion. The fixing member is arranged at one end of the connecting shaft, and the limiting protrusion is arranged at the other end of the connecting shaft and protrudes from the radial surface of the connecting shaft. Both the fixing member and the limiting protrusion are arranged in the equalizing cover.
8. The disconnecting switch according to claim 7, characterized in that, One end of the connecting shaft is provided with an external thread, and the fixing member is threadedly connected to the external thread of the connecting shaft.
9. The disconnector according to claim 1, characterized in that, The equalizing cover is provided with a receiving cavity, and the equalizing cover is provided with a through hole corresponding to the connecting shaft, and the through hole communicates with the receiving cavity.
10. The disconnecting switch according to claim 1, characterized in that, The disconnecting switch further includes a connecting member. One end of the connecting member is connected to the first knife blade, and the other end of the connecting member is connected to the second knife blade. There are multiple connecting members, and the multiple connecting members are sequentially arranged in the direction away from the connecting shaft.