Conductive clamp, primary conductive loop of vacuum circuit breaker and vacuum circuit breaker

Abstract

The invention relates to the technical field of vacuum circuit breakers, in particular to a conductive clamp, a primary conductive loop of a vacuum circuit breaker and the vacuum circuit breaker. The conductive clamp comprises an annular conductive clamp body with an opening, an inner hole of the conductive clamp body forms a clamping opening used for being assembled to a conductive rod, connecting ends are arranged on the periphery of the conductive clamp body at intervals, the connecting ends form a fin type heat dissipation structure on the periphery of the conductive clamp body, one face of each connecting end is a connecting face used for being connected with a flexible connector, and the other face of each connecting end is a connecting face used for being connected with a flexible connector. And other side surfaces are radiating surfaces. The connecting ends arranged at the periphery of the conductive clamp at intervals not only provide a multi-channel circulation path for current, but also utilize the interval areas as heat dissipation channels, thereby effectively reducing heat accumulation, and accelerating conduction and radiation of heat to the outside, thereby obviously reducing the temperature of the conductive clamp and the soft connection part, and improving the reliability of the conductive clamp. And the thermal stability and the safety of the whole conductive system are improved.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum circuit breakers, and in particular to a conductive clamp, a primary conductive circuit of a vacuum circuit breaker and a vacuum circuit breaker. Background Art

[0002] In the vacuum circuit breaker, the conductive rod of the vacuum arc extinguishing chamber is directly connected to the conductive clamp, so that the current is transmitted from the internal contact of the arc extinguishing chamber to the outside. In order to compensate for the displacement caused by temperature changes, mechanical vibrations and other factors and ensure the continuity and stability of the electrical connection, the conductive clamp is connected to the lower terminal board through a flexible connection, thereby completing the construction of the entire current transmission path from the conductive rod of the arc extinguishing chamber to the external circuit.

[0003] For example, the Chinese utility model patent with the authorization announcement number CN220543803U discloses a soft connection structure of the moving end of a vacuum circuit breaker, which specifically discloses a vacuum arc chamber and a connecting rod, wherein the connecting rod and the moving contact of the vacuum arc chamber are matched and connected, and the lower outlet of the vacuum arc chamber is connected to the moving end of the vacuum arc chamber through a soft connection structure, and the soft connection structure includes a conductive clip and a soft connection seat, wherein the conductive clip is installed in the lower outlet, and the soft connection seat is installed outside the conductive clip, and there are six soft connection seats, wherein two soft connection seats are installed at the front and rear ends of the conductive clip, and four soft connection seats are symmetrically installed on the left and right sides of the conductive clip. When the vacuum arc chamber is closed, the current is suitable for passing through the upper outlet, the vacuum arc chamber, the conductive clip and the soft connection seat in sequence, and then transmitted from the lower outlet.

[0004] Although the above-mentioned vacuum circuit breaker moving end soft connection structure has multiple soft connection seats connected to the side of the conductive clamp, achieving a good current flow effect, and a heat sink is installed on the side of the soft connection seat to ensure the heat dissipation effect. However, the conductive clamp is connected to the soft connection seat on the side, and the high heat at the conductive clamp and the soft connection is hindered during the transfer process, and the heat is difficult to dissipate. In addition, the heat sink arranged on the outside of the soft connection seat requires the heat to pass through a longer path before it can play a heat dissipation role, and the heat dissipation effect is not obvious. Especially when a large current is passed, the heat sink arranged on the outside of the soft connection is even more difficult to effectively reduce the temperature rise at the conductive clamp and the soft connection. Summary of the invention

[0005] The purpose of the present invention is to provide a conductive clip to solve the problem in the prior art that when the conductive clip is connected to the flexible connection seat on the periphery, the heat dissipation is affected, and the heat sink provided on the outside of the flexible connection seat is difficult to effectively reduce the temperature rise at the conductive clip and the flexible connection. The purpose of the present invention is also to provide a primary conductive circuit of a vacuum circuit breaker to solve the problem in the prior art that when the conductive clip is connected to the flexible connection seat on the periphery, the heat dissipation is affected, and the heat sink provided on the outside of the flexible connection seat is difficult to effectively reduce the temperature rise at the conductive clip and the flexible connection. The purpose of the present invention is also to provide a vacuum circuit breaker to solve the problem in the prior art that when the conductive clip is connected to the flexible connection seat on the periphery, the heat dissipation is affected, and the heat sink provided on the outside of the flexible connection seat is difficult to effectively reduce the temperature rise at the conductive clip and the flexible connection, thereby affecting the safety of the vacuum circuit breaker.

[0006] To achieve the above-mentioned purpose, the technical solution of the conductive clip provided by the present invention is: the conductive clip includes an annular conductive clip body with an opening, the inner hole of the conductive clip body constitutes a clamping opening for assembly to the conductive rod, and the outer periphery of the conductive clip body is provided with connecting ends at intervals, and the connecting ends constitute a fin-type heat dissipation structure on the outer periphery of the conductive clip body, one side of the connecting end is a connecting surface for connecting to a flexible connection, and the other side is a heat dissipation surface.

[0007] As a further improvement, the upper and lower ends of the connecting end extend to be flush with the conductive clip body.

[0008] As a further improvement, the connection ends are evenly arranged on the outer periphery of the conductive clip body in the circumferential direction.

[0009] As a further improvement, the connecting end and the conductive clip body are an integrated structure.

[0010] As a further improvement, a connection hole is provided on the connection surface for the flexible connection to be fixed to one side of the connection end through the connection hole.

[0011] As a further improvement, the inner circumferential surface of the conductive clip body is provided with a circumferentially extending toothed structure.

[0012] As a further improvement, the tooth structure is a wavy sawtooth.

[0013] The beneficial effect is: the present invention provides a new conductive clip, and the connection ends arranged at intervals around the conductive clip not only provide a multi-channel flow path for the current, but also use the interval area as a heat dissipation channel, effectively reducing heat accumulation. At the same time, because the connection ends form a fin-type heat dissipation structure on the outer periphery of the conductive clip body, the conduction and radiation of heat to the outside world are accelerated, thereby significantly reducing the temperature of the conductive clip and the soft connection, and improving the thermal stability and safety of the entire conductive system.

[0014] To achieve the above-mentioned purpose, the technical solution of the primary conductive circuit of the vacuum circuit breaker provided by the present invention is: the primary conductive circuit of the vacuum circuit breaker includes a conductive clip and a flexible connection for connecting between the conductive rod and the lower terminal plate of the vacuum interrupter, the conductive clip includes an annular conductive clip body with an opening, the inner hole of the conductive clip body constitutes a clamping opening for assembly to the conductive rod, the outer periphery of the conductive clip body is provided with connecting ends at intervals, the connecting ends constitute a fin-type heat dissipation structure on the outer periphery of the conductive clip body, one side of the connecting end is a connecting surface for connecting to the flexible connection, and the other side is a heat dissipation surface.

[0015] As a further improvement, the upper and lower ends of the connecting end extend to be flush with the conductive clip body.

[0016] As a further improvement, the connection ends are evenly arranged on the outer periphery of the conductive clip body in the circumferential direction.

[0017] As a further improvement, the connecting end and the conductive clip body are an integrated structure.

[0018] As a further improvement, a connection hole is provided on the connection surface for the flexible connection to be fixed to one side of the connection end through the connection hole.

[0019] As a further improvement, the inner circumferential surface of the conductive clip body is provided with a circumferentially extending toothed structure.

[0020] As a further improvement, the tooth structure is a wavy sawtooth.

[0021] As a further improvement, the flexible connection includes a vertical extension section for connecting to the connection end, the bottom of the vertical extension section is connected to a C-shaped extension section, and the horizontal extension section at the bottom of the C-shaped extension section is used for fixed connection to the lower terminal board.

[0022] The beneficial effect is: the present invention provides a primary conductive circuit of a vacuum circuit breaker using a new conductive clip, wherein the connection ends arranged at intervals around the conductive clip not only provide a multi-channel flow path for the current, but also utilize the interval area as a heat dissipation channel, thereby effectively reducing heat accumulation. At the same time, because the connection ends form a fin-type heat dissipation structure on the periphery of the conductive clip body, the conduction and radiation of heat to the outside world are accelerated, thereby significantly reducing the temperature of the conductive clip and the soft connection, and improving the thermal stability and safety of the entire conductive system.

[0023] To achieve the above-mentioned purpose, the technical solution of the vacuum circuit breaker provided by the present invention is: the vacuum interrupter is connected to the primary conductive circuit of the vacuum circuit breaker, the primary conductive circuit of the vacuum circuit breaker includes a conductive clip and a flexible connection for connecting between the conductive rod of the vacuum interrupter and the lower terminal board, the conductive clip includes an annular conductive clip body with an opening, the inner hole of the conductive clip body constitutes a clamping opening for assembly to the conductive rod, the outer periphery of the conductive clip body is provided with connecting ends at intervals, the connecting ends constitute a fin-type heat dissipation structure on the outer periphery of the conductive clip body, one side of the connecting end is a connecting surface for connecting to the flexible connection, and the other side is a heat dissipation surface.

[0024] As a further improvement, the upper and lower ends of the connecting end extend to be flush with the conductive clip body.

[0025] As a further improvement, the connection ends are evenly arranged on the outer periphery of the conductive clip body in the circumferential direction.

[0026] As a further improvement, the connecting end and the conductive clip body are an integrated structure.

[0027] As a further improvement, a connection hole is provided on the connection surface for the flexible connection to be fixed to one side of the connection end through the connection hole.

[0028] As a further improvement, the inner circumferential surface of the conductive clip body is provided with a circumferentially extending toothed structure.

[0029] As a further improvement, the tooth structure is a wavy sawtooth.

[0030] As a further improvement, the flexible connection includes a vertical extension section for connecting to the connection end, the bottom of the vertical extension section is connected to a C-shaped extension section, and the horizontal extension section at the bottom of the C-shaped extension section is used for fixed connection to the lower terminal board.

[0031] The beneficial effect is: the present invention provides a vacuum circuit breaker using a new conductive clip, and the connection ends arranged at intervals around the conductive clip not only provide a multi-channel flow path for the current, but also use the interval area as a heat dissipation channel, effectively reducing heat accumulation. At the same time, because the connection ends form a fin-type heat dissipation structure on the outer periphery of the conductive clip body, the conduction and radiation of heat to the outside world are accelerated, thereby significantly reducing the temperature of the conductive clip and the soft connection, improving the thermal stability and safety of the entire conductive system, and thus helping to improve the safe, stable and service life of the vacuum circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A three-dimensional diagram of an embodiment of the conductive clip provided by the present invention after being assembled on a conductive rod of an arc extinguishing chamber; Figure 2 A three-dimensional diagram of an embodiment of the conductive clip provided by the present invention; Figure 3A three-dimensional diagram of a soft connection of an embodiment of a primary conductive circuit of a vacuum circuit breaker provided by the present invention.

[0033] In the figure: 1. lower terminal block; 2. flexible connection; 3. conductive clip; 4. vacuum arc extinguishing chamber; 5. insulating pull rod; 6. connecting hole; 7. serration; 8. first joint section; 9. second joint section; 10. connecting end; 11. vertical extension section; 12. horizontal extension section. DETAILED DESCRIPTION

[0034] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0035] As key electrical connection components, the conductive clip and the flexible connection in the vacuum circuit breaker undertake the important tasks of current transmission and electrical connection. However, since the conductive clip and the flexible connection generate heat during the current transmission process, and the contact area and contact pressure between the two are limited, heat is easily accumulated at the contact point, causing the temperature to rise rapidly. This temperature rise will not only affect the electrical performance between the conductive clip and the flexible connection, but may also cause local overheating and even cause serious consequences such as fire. The prior art cited in the background technology is connected to the circumference of the conductive clip with a flexible connection seat, so that it has an excellent current flow effect. When the current passes through, it is difficult to dissipate the heat at the conductive clip and the flexible connection seat. Even if a heat sink is provided on the outside of the flexible connection seat, it is still difficult to reduce the temperature rise at the conductive clip and the flexible connection due to the long heat transfer path, especially when a large current passes, there is a high safety hazard. Based on this, the present invention provides a new conductive clip to solve the problems existing in the above-mentioned prior art.

[0036] The overall design concept of the present invention is: utilizing connection ends that are distributed divergently around the conductive clip body, similar to a simple drawing of the sun, or similar to gears in a machine. These connection ends not only facilitate multi-path flow, but also effectively promote heat dissipation through the spacing between each other, thereby ensuring efficient heat dissipation and stable operation of the conductive clip under high current conditions.

[0037] Specifically, as a basic technical solution, Figure 1-3 As shown, the vacuum circuit breaker includes a vacuum interrupter 4, and the primary conductive circuit on the vacuum interrupter 4 includes a conductive clamp 3 and a flexible connection 2. The conductive clamp 3 is connected to the conductive rod of the vacuum interrupter 4, and the conductive rod of the vacuum interrupter 4 is also connected to the insulating pull rod 5. The lower part of the conductive rod is also connected to the lower terminal board 1, and the two ends of the flexible connection 2 are respectively connected to the conductive clamp 3 and the lower terminal board 1, so as to transmit the current inside the vacuum circuit breaker to the external circuit.

[0038] The conductive clip 3 includes a conductive clip body, which is annular and has an opening, and presents a C-shaped structure as a whole. When installing, it only needs to be elastically opened to achieve quick installation, thereby completing the installation of the conductive clip. Connecting ends are arranged at intervals on the outer periphery of the conductive clip body, and the connecting ends extend radially outward to form a fin-type heat dissipation structure on the outer periphery of the conductive clip body. After the conductive clip body is fixed on the conductive rod of the vacuum arc chamber, the conductive clip 3 is connected to the soft connection 2 through at least one side of the connection end. The current can be conducted in parallel through multiple paths, which improves the flow, effectively disperses the current density, and reduces the risk of local overheating. The interval between the connection ends not only facilitates the fixation of the soft connection 2, but also promotes the effective dissipation of heat. When a large current passes through, the generated heat can be quickly radiated outward through these interval areas, avoiding the accumulation of heat at the conductive clip 3 and the soft connection 2, and effectively improving the thermal stability and safety of the entire system. On the basis of reducing the overall weight, the connection end can more effectively conduct heat to the external environment, thereby improving the heat dissipation efficiency, ensuring that the temperature rise of the conductive clip 3 and the soft connection 2 remains at a normal level under high-load operation, and overall ensuring the long-term stable operation of the conductive clip and the entire circuit system, extending the life of the vacuum circuit breaker.

[0039] Based on the above overall introduction to the vacuum circuit breaker of the present invention, a more specific embodiment is provided below on the basis of the overall introduction: This embodiment focuses on the detailed description of the specific structure of the conductive clip.

[0040] The upper and lower ends of the connection end extend to be flush with the main body of the conductive clip 3 to improve the overall structural strength of the conductive clip. After one side of the connection end is fixed to the soft connection, the side of the connection end facing away from the soft connection, the top surface and the bottom surface, and the side away from the main body of the conductive clip all constitute effective heat dissipation surfaces. Multiple heat dissipation surfaces help to quickly dissipate the heat generated when a large current passes through, thereby effectively reducing the temperature at the connection between the conductive clip and the soft connection.

[0041] It has been described above that the conductive clip body is a C-shaped structure with a fracture. The C-shaped structure and the fracture enable the conductive clip to adapt to conductive rods of different diameters, thereby enhancing versatility and flexibility. More preferably, in this embodiment, Figure 2 As shown, the two ends of the C-shaped structure are respectively provided with a first joint segment 8 and a second joint segment 9 toward the radial outside, and the first joint segment 8 and the second joint segment 9 form an integral connection end after docking. When a larger flow is required, the first joint segment 8 and the second joint segment 9 can be fixed with the soft connection 2 after docking, and the fixing of the conductive clip on the conductive rod and the fixing of the soft connection to the conductive clip are completed at the same time. Of course, in other embodiments, the conductive clip body can also be formed by two semicircular butt-jointed fixings.

[0042] like Figure 2 As shown, the inner circumferential surface of the conductive clip body is provided with a circumferentially extending toothed structure to improve the stability of the installation of the conductive clip and the conductive rod. Figure 2 As shown, a wavy sawtooth 7 is arranged in the conductive clip body, and each vertically extending sawtooth 7 can generate a certain locking force on the conductive rod in the radial direction, thereby preventing the conductive clip from loosening due to vibration, temperature change and other factors during use, ensuring the stability and durability of the connection, and protecting the connection between the conductive clip and the conductive rod from damage.

[0043] Based on the above overall introduction to the vacuum circuit breaker of the present invention, a more specific embodiment is provided below on the basis of the overall introduction: This embodiment focuses on the connection end and provides a detailed description.

[0044] The connection ends are evenly arranged on the periphery of the conductive clip body, forming a plurality of heat dissipation channels, which not only increases the heat dissipation area, but also promotes the uniform dissipation of heat, helps to reduce the overall temperature of the conductive clip and improve its thermal performance. The connection ends evenly arranged on the periphery of the conductive clip body can evenly distribute the load, and also play the role of reinforcing ribs, enhance the mechanical strength and rigidity of the conductive clip body, reduce the risk of deformation and damage, and improve the overall stability and life of the conductive clip. In other embodiments, three connection ends can also be arranged on the periphery of the conductive clip body at intervals of 120 degrees. Or, according to actual conditions, a connection end is set on one side of the conductive clip body for soft connection.

[0045] The connection end may specifically be a connection plate. In this embodiment, in order to improve applicability, Figure 2 As shown, six connecting plates are evenly distributed on the periphery of the conductive clip body, and one of the connecting plates is separated from the center, corresponding to the fracture of the above-mentioned C-shaped conductive clip body, and the two pieces separated from the center constitute the first joint section 8 and the second joint section 9. At this time, the conductive clip 3 can connect six soft connections at the same time, which can provide multiple current transmission paths for the electrical system and disperse the current to six connection points. The current load borne by each connection point will be significantly reduced, which helps to reduce heat accumulation and contact resistance, improve the safety and stability of the system, and can also connect a corresponding number of soft connections according to actual needs to meet the use requirements of most vacuum circuit breakers.

[0046] In this embodiment, the connection end and the conductive clip body are an integrated structure, which ensures seamless connection between the connection end and the conductive clip body, avoids the risk of foreign matter intrusion, and makes the current conduction smoother, which helps to improve the conductivity efficiency, prolong the service life of the conductive clip, and simplify the installation process. In other embodiments, according to the number of soft connections that need to be connected, a corresponding number of connection ends can be fixed on the conductive clip body by welding. Alternatively, the connection end can also be connected to the conductive clip body by bolts, and when the number of soft connections connected to the conductive clip is reduced, the connection end can also be removed from the conductive clip body.

[0047] Specifically, Figure 1-2 As shown, the flexible connection 2 is fixed on one side of the connection end, which is called the connection surface. A connection hole 6 is provided on the connection surface. The flexible connection 2 and the conductive clip 3 are tightly connected through the connection bolts and the connection hole 6, thereby ensuring the conductive performance of the entire circuit. At the same time, it is convenient to disassemble and assemble, and it is convenient to maintain and replace the flexible connection or the connection end, thereby reducing the maintenance cost and time. In other embodiments, a rivet hole may also be provided on the connection surface. Alternatively, the flexible connection may also be fixed to the connection surface by welding.

[0048] Based on the above overall introduction to the vacuum circuit breaker of the present invention, a more specific embodiment is provided below on the basis of the overall introduction: This embodiment focuses on the detailed description of soft connection.

[0049] like Figure 3 As shown, the flexible connection includes a vertical extension section 11 for connecting to the connection end, the bottom of the vertical extension section 11 is connected to a C-shaped extension section, and the horizontal extension section 12 at the bottom of the C-shaped extension section is fixedly connected to the lower wiring board. Figure 1 As shown, the flexible connector 2 having a vertical extension section 11 and a C-shaped extension section having a horizontal extension section 12 can be assembled flexibly to adapt to complex installation environments. The vertical extension section 11 ensures the contact area when connected with the conductive clip 3, and similarly, the horizontal extension section 12 ensures the contact area when connected with the lower wiring board 1, thereby ensuring the stability of the connection and reliable electrical contact.

[0050] The specific structure of the conductive clip of the embodiment of the present invention is the same as the conductive clip structure in the embodiment of the vacuum circuit breaker introduced above. The specific structure of the primary conductive circuit of the vacuum circuit breaker of the present invention is the same as the primary conductive circuit structure of the vacuum circuit breaker in the embodiment of the vacuum circuit breaker introduced above, and they will not be repeated herein.

[0051] It should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0052] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A conductive clip, characterized in that: The clip includes an annular conductive clip body with an opening, the inner hole of the conductive clip body constitutes a clamping opening for assembly onto a conductive rod, and connection ends are arranged at intervals on the outer periphery of the conductive clip body. The connection ends constitute a fin-type heat dissipation structure on the outer periphery of the conductive clip body, one side of the connection end is a connection surface for connecting to a flexible connection, and the other side is a heat dissipation surface.

2. The conductive clip according to claim 1, characterized in that: The upper and lower ends of the connecting end extend to be flush with the conductive clip body.

3. The conductive clip according to claim 1, characterized in that: The connection ends are evenly arranged on the outer periphery of the conductive clip body in the circumferential direction.

4. The conductive clip according to claim 1, characterized in that: The connecting end and the conductive clip body are an integrated structure.

5. The conductive clip according to claim 1, characterized in that: A connection hole is provided on the connection surface, and is used for the flexible connection to be fixed to one side of the connection end through the connection hole.

6. The conductive clip according to any one of claims 1 to 5, characterized in that: The inner circumferential surface of the conductive clip body is provided with a circumferentially extending toothed structure.

7. The conductive clip according to claim 6, characterized in that: The tooth structure is a wavy sawtooth.

8. A primary conductive circuit of a vacuum circuit breaker, comprising a conductive clip and a flexible connection for connecting between a conductive rod of a vacuum interrupter and a lower terminal board, characterized in that: The conductive clip is the conductive clip described in any one of claims 1 to 7.

9. The primary conductive circuit of the vacuum circuit breaker according to claim 8, characterized in that: The flexible connection includes a vertical extension section for connecting with the connection end, the bottom of the vertical extension section is connected with a C-shaped extension section, and the horizontal extension section at the bottom of the C-shaped extension section is used for fixed connection with the lower wiring board.

10. A vacuum circuit breaker, including a vacuum interrupter, characterized in that: The vacuum interrupter is connected to the primary conductive circuit of the vacuum circuit breaker as claimed in claim 8 or 9.

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