Switching contact blade structure for high-voltage vacuum switches

Abstract

The utility model discloses a switch contact contact patch structure for high voltage vacuum switch relates to high voltage vacuum switch technical field, including base, the top of base is provided with the contact patch mechanism for forming a plurality of parallel contact points, and the contact patch mechanism includes: contact unit and contact patch unit, and the contact unit sets up in the top of base, including substrate, the bottom circumference array mounting of substrate has a plurality of contact lobe, through the bottom circumference array mounting of substrate of contact unit a plurality of contact lobe, can independently adapt and center under the action of self elastic force, and the contact patch in contact patch unit forms a plurality of parallel contact points, thereby effectively increases real contact area, avoids the point or line contact problem caused by machining accuracy and assembly error, significantly improves current carrying capacity and contact reliability. Meanwhile, the independent movement of contact lobe ensures the uniform distribution of contact points, reduces the local overheating and arc risk, prolongs the service life of assembly.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage vacuum switch technology, specifically to the contact plate structure of a switch for a high-voltage vacuum switch. Background Technology

[0002] The contact structure of a high-voltage vacuum switch is a core component for achieving efficient and reliable circuit switching in a power system. Its design must take into account material properties, structural form, arc extinguishing principle, and manufacturing process.

[0003] According to the patent titled "A Contact Sheet for a Large-Capacity Vacuum Interruptor and a Contact Structure Using the Same" (Patent Publication No.: CN213877942U, Publication Date: 2021-08-03), the center of the arc-ignition surface of the contact sheet is a raised portion, and the raised portion transitions to the edge of the contact sheet via a bevel. Simultaneously, long and short current-draining grooves are formed on the contact sheet, and the opening positions of these grooves at the edge of the contact sheet are aligned with the opening positions of the grooves in the contact cup seat on the back of the contact sheet. The arc-ignition point position is controlled by adjusting the diameter of the raised portion and the angle between the plane containing the raised portion and the edge of the contact sheet. The long and short current-draining grooves restrict and guide the current direction in the contact sheet, enabling the contact sheet to have a large current breaking capacity and reducing eddy currents. This significantly enhances the large current breaking capacity of the vacuum interruptor.

[0004] Based on the aforementioned existing technology, the current switch contact sheet structure for high-voltage vacuum switches still has the following problems: the existing switch contact sheet structure is usually two rigid planes or large curvature arc surfaces in contact. Due to processing accuracy and assembly errors, the actual contact is often only a few points or a narrow line. The actual current-carrying area is much smaller than the theoretical contact area. Therefore, this utility model provides a switch contact sheet structure for high-voltage vacuum switches. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a switch contact sheet structure for high-voltage vacuum switches, which solves the following problems that existing switch contact sheet structures for high-voltage vacuum switches still have: existing switch contact sheet structures are usually two rigid planes or large-curvature arc surfaces in contact. Due to machining accuracy and assembly errors, the actual contact is often only a few points or a narrow line, and the actual current-carrying area is much smaller than the theoretical contact area.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a switch contact plate structure for a high-voltage vacuum switch, comprising a base, wherein a contact plate mechanism is provided on the top of the base for forming multiple parallel contact points, the contact plate mechanism comprising:

[0007] The contact unit is located above the base and includes a substrate. Several contact petals are mounted in a circular array on the bottom of the substrate. Under the action of their own elastic force, the multiple independent contact petals can independently adapt and center, forming multiple parallel contact points.

[0008] A contact unit is disposed above the base and includes a contact piece, with the contact piece and contact flap in contact.

[0009] Preferably, three heat dissipation fins are fixedly installed on the side of the substrate away from the contact flap to increase the heat dissipation area.

[0010] Preferably, a mounting base is fixedly installed on the top of the base, and a mounting groove is provided on the top of the mounting base. A spring is fixedly installed inside the mounting groove by screws to facilitate the replacement of the spring.

[0011] Preferably, a guide post is fixedly installed at the bottom of one end of the spring piece, and a threaded sleeve is rotatably installed on the surface of the guide post to facilitate the replacement of the substrate and the contact. The surface of the threaded sleeve is provided with a spiral groove to guide the current path and generate a magnetic field parallel to the contact surface.

[0012] Preferably, an upper cylinder is fixedly installed at the bottom of the spring piece, and a lower cylinder is fixedly installed at the top of the base, with a spring installed between the lower cylinder and the upper cylinder to achieve the reset of the spring piece.

[0013] Preferably, the contact unit further includes a fixing seat fixedly installed on the top of the base, and the contact is fixedly installed on the top of the fixing seat. The fixing seat has a plurality of heat dissipation holes arranged in a circular array inside, so as to realize air flow inside the fixing seat through the heat dissipation holes and realize heat dissipation of the contact.

[0014] This utility model provides a switch contact sheet structure for a high-voltage vacuum switch. Compared with the prior art, it has the following advantages:

[0015] 1. The contact plate structure of this high-voltage vacuum switch utilizes several contact petals mounted in a circumferential array on the bottom of the substrate within the contact unit. These petals, under their own elastic force, can independently adapt and align, forming multiple parallel contact points with the contact plates in the contact plate unit. This effectively increases the actual contact area, avoiding point or line contact problems caused by machining accuracy and assembly errors, and significantly improving current carrying capacity and contact reliability. Simultaneously, the independent movement of the contact petals ensures a uniform distribution of contact points, reducing the risk of localized overheating and arcing, and extending the component's service life.

[0016] 2. The contact structure of this high-voltage vacuum switch enhances airflow and heat dissipation area through heat dissipation fins on the substrate and heat dissipation holes inside the mounting base, achieving efficient cooling of the contacts and preventing overheating damage. Furthermore, the helical grooves on the threaded sleeve surface guide the current path, generating a magnetic field parallel to the contact surface, which aids in arc control and extinguishing, improving breaking performance. The spring contacts are reset by a spring, and the combination of screws and guide posts facilitates quick replacement and maintenance, improving the structural practicality and reliability. Attached Figure Description

[0017] Figure 1 This is a right-side perspective view of the structure of this utility model;

[0018] Figure 2 This is a bottom-view perspective structural diagram of the present invention;

[0019] Figure 3 This is a top-view, split-layer three-dimensional structural diagram of the present invention;

[0020] Figure 4 This is a partially disassembled three-dimensional structural diagram of the present invention;

[0021] Figure 5 This is a three-dimensional cross-sectional view of the contact unit of this utility model.

[0022] In the diagram: 1. Base; 2. Contact mechanism; 21. Contact unit; 211. Base plate; 212. Contact flap; 213. Mounting seat; 214. Mounting groove; 215. Spring; 216. Screw; 217. Upper cylinder; 218. Lower cylinder; 219. Spring; 2110. Heat dissipation fins; 2111. Threaded sleeve; 2112. Guide post; 2113. Spiral groove; 22. Contact unit; 221. Fixing seat; 222. Heat dissipation hole; 223. Contact. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5 This utility model provides a technical solution:

[0025] A switch contact structure for a high-voltage vacuum switch includes a base 1. A contact mechanism 2 is provided on the top of the base 1 to form multiple parallel contact points. The contact mechanism 2 includes:

[0026] The contact unit 21 is disposed above the base 1 and includes a substrate 211. Several contact petals 212 are mounted in a circular array on the bottom of the substrate 211. Under the action of their own elastic force, the multiple independent contact petals 212 can independently adapt and center, forming multiple parallel contact points.

[0027] The contact unit 22 is disposed above the base 1 and includes a contact piece 223, with the contact flap 212 in contact with the contact piece 223.

[0028] In this embodiment, three heat dissipation fins 2110 are fixedly installed on the side of the substrate 211 away from the contact flap 212 to increase the heat dissipation area.

[0029] Three heat dissipation fins 2110 are fixedly installed on the side of the substrate 211 away from the contact flap 212. By increasing the heat dissipation area, heat dissipation is effectively promoted, and the performance of the contact unit 21 is prevented from degrading due to high temperature, thereby improving the overall heat dissipation efficiency and component durability.

[0030] In this embodiment, a mounting base 213 is fixedly installed on the top of the base 1, and a mounting groove 214 is provided on the top of the mounting base 213. A spring piece 215 is fixedly installed inside the mounting groove 214 by screws 216 to facilitate the replacement of the spring piece 215.

[0031] A mounting base 213 is fixedly installed on the top of the base 1, and a mounting groove 214 is provided on the top of the mounting base 213. A spring piece 215 is fixedly installed inside the mounting groove 214 by screws 216. The connection method of screws 216 facilitates the quick disassembly and replacement of the spring piece 215, enhancing the convenience of maintenance and structural flexibility.

[0032] In this embodiment, a guide post 2112 is fixedly installed at the bottom of one end of the spring piece 215, and a threaded sleeve 2111 is rotatably installed on the surface of the guide post 2112 to facilitate the replacement of the substrate 211 and the contact piece 212. A spiral groove 2113 is opened on the surface of the threaded sleeve 2111 to guide the current path and generate a magnetic field parallel to the contact surface.

[0033] A guide post 2112 is fixedly installed at one end of the spring piece 215, and a threaded sleeve 2111 is rotatably installed on the surface of the guide post 2112. The base plate 211 and the contact flap 212 can be easily replaced through the threaded connection. At the same time, the spiral groove 2113 on the surface of the threaded sleeve 2111 generates a magnetic field parallel to the contact surface by guiding the current path, which helps to optimize the current distribution and arc control and improve electrical performance.

[0034] In this embodiment, an upper cylinder 217 is fixedly installed at the bottom of the spring piece 215, and a lower cylinder 218 is fixedly installed at the top of the base 1. A spring 219 is installed between the lower cylinder 218 and the upper cylinder 217 to realize the reset of the spring piece 215.

[0035] The bottom of the spring piece 215 is fixedly mounted with an upper cylinder 217, and the top of the base 1 is fixedly mounted with a lower cylinder 218. A spring 219 is installed between the lower cylinder 218 and the upper cylinder 217. The spring piece 215 is automatically reset by the elastic action of the spring 219, ensuring that the contact piece mechanism 2 can quickly return to its original position after operation, thereby improving the reliability of the action and the stability of the structure.

[0036] In this embodiment, the contact unit 22 further includes a fixing seat 221 fixedly installed on the top of the base 1, and the contact 223 is fixedly installed on the top of the fixing seat 221. The fixing seat 221 has a plurality of heat dissipation holes 222 arranged in a circular array inside. The air flow inside the fixing seat 221 is realized through the heat dissipation holes 222, so as to dissipate heat from the contact 223.

[0037] The heat dissipation holes 222 promote airflow inside the mounting base 221, effectively dissipating heat from the contact piece 223, preventing overheating and extending the service life of the contact piece 223.

[0038] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0039] During operation, firstly, the spring piece 215 is installed inside the mounting groove 214 on the top of the mounting base 213 by screws 216. Then, the spring 219 is installed between the upper cylinder 217 and the lower cylinder 218. The base plate 211 and the contact flap 212 are screwed and rotated on the surface of the guide post 2112 through the threaded sleeve 2111, so that they are installed on the spring piece 215.

[0040] Then, when the spring 215 is pressed down and squeezes the spring 219, the contact flap 212 comes into contact with the surface of the mounting base 213.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A switch contact structure for a high-voltage vacuum switch, comprising a base (1), characterized in that: The base (1) is provided with a contact plate mechanism (2) on its top for forming multiple parallel contact points. The contact plate mechanism (2) includes: The contact unit (21) is disposed above the base (1) and includes a substrate (211). The bottom circumferential array of the substrate (211) is equipped with several contact petals (212). Under the action of its own elastic force, the multiple independent contact petals (212) can independently adapt and center, forming multiple parallel contact points. The contact unit (22) is disposed above the base (1) and includes a contact piece (223), and the contact petal (212) is in contact with the contact piece (223).

2. The contact plate structure for a high-voltage vacuum switch according to claim 1, characterized in that: Three heat dissipation fins (2110) are fixedly installed on the side of the substrate (211) away from the contact petal (212) to increase the heat dissipation area.

3. The contact plate structure for a high-voltage vacuum switch according to claim 1, characterized in that: The base (1) is fixedly mounted with a mounting base (213) on its top, and the mounting base (213) has a mounting groove (214) on its top. A spring piece (215) is fixedly mounted inside the mounting groove (214) by screws (216) for easy replacement of the spring piece (215).

4. The switch contact plate structure for a high-voltage vacuum switch according to claim 3, characterized in that: A guide post (2112) is fixedly installed at one end of the spring piece (215), and a threaded sleeve (2111) is rotatably installed on the surface of the guide post (2112) to facilitate the replacement of the substrate (211) and the contact (212). A spiral groove (2113) is opened on the surface of the threaded sleeve (2111) to guide the current path and generate a magnetic field parallel to the contact surface.

5. The switch contact plate structure for a high-voltage vacuum switch according to claim 3, characterized in that: The bottom of the spring piece (215) is fixedly mounted with an upper cylinder (217), and the top of the base (1) is fixedly mounted with a lower cylinder (218). A spring (219) is installed between the lower cylinder (218) and the upper cylinder (217) to realize the reset of the spring piece (215).

6. The contact plate structure for a high-voltage vacuum switch according to claim 1, characterized in that: The contact unit (22) also includes a fixing seat (221) fixedly installed on the top of the base (1), and the contact (223) is fixedly installed on the top of the fixing seat (221). The fixing seat (221) has a plurality of heat dissipation holes (222) arranged in an internal circumferential array. The air flow inside the fixing seat (221) is realized through the heat dissipation holes (222) to dissipate heat from the contact (223).

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