A circuit breaker split type lightweight lower support

Abstract

The application discloses a circuit breaker split type light-weight lower support, which comprises an upper support assembly, a lower support assembly, a supporting rod, a vacuum arc-extinguishing chamber and a flexible connection, wherein the lower support assembly comprises an aluminum supporting heat-dissipation component, a left conductive component and a right conductive component which are connected to the aluminum supporting heat-dissipation component through connecting bolts respectively, and the left conductive component and the right conductive component are symmetrically arranged. The left conductive component and the right conductive component are connected to the left and right sides of the aluminum supporting heat-dissipation component through fixed connecting bolts respectively, and the connection is reliable and the stress is reasonable. After the connection, the whole component mainly bears the current by the left main conductive component and the right conductive component, the current flows into the left conductive component and the right conductive component from the vacuum arc-extinguishing chamber through the flexible connection on the two sides, and then flows out to the lap bus through the lap bus surface. The aluminum supporting heat-dissipation component mainly bears the longitudinal impact force when the vacuum arc-extinguishing chamber is opened and closed, and dissipates heat through the large-area heat-dissipation ribs on the surface, so that the current-carrying capacity is improved.

Description

TECHNICAL FIELD

[0001] The application relates to a split type lightened lower support of a circuit breaker, in particular to a split type lightened lower support of a circuit breaker which realizes a current carrying capacity of 5000A and above and is lightened and easy to install. BACKGROUND

[0002] Since the early 1940s, with the improvement of industrial and manufacturing levels and the increasing demand for power, the demand for circuit breakers with a rated current of 5000A and above has been increasing. The key technology for manufacturing high-current and high-breaking vacuum circuit breakers lies in the design and manufacture of the main circuit structure. At present, the design of the main circuit of domestic high-current circuit breakers basically adopts a suspension mode with air insulation. The upper and lower outgoing lines of the main circuit generally adopt cast copper pieces, and the radiator and the outgoing line are integrally cast. The connection between the arc-extinguishing chamber and the outgoing line adopts an end face lap joint mode. This mode causes the main circuit to have a rough appearance, low conductor conductivity, small current passing area and serious material waste. The weight of a single pure copper support is above 70kg. The installation and manufacturing costs are high, it is difficult to further reduce the manufacturing cost, and it cannot meet the demand for limiting the total weight of the circuit breaker in some special application occasions. SUMMARY

[0003] The application aims to provide a split type lightened lower support of a circuit breaker which realizes a current carrying capacity of 5000A and above and is lightened and easy to install.

[0004] To solve the above technical problems, the technical scheme of the application is as follows: a split type lightened lower support of a circuit breaker, which is characterized by comprising an upper support assembly, a lower support assembly, a support rod connected to the upper support assembly and the lower support assembly respectively, a vacuum arc-extinguishing chamber located in a region surrounded by the upper support assembly, the lower support assembly and the support rod, a flexible connection connected to the vacuum arc-extinguishing chamber arranged on the lower support assembly, the lower support assembly comprising an aluminum support and heat dissipation component, a left conductive component and a right conductive component connected to the aluminum support and heat dissipation component through connecting bolts respectively, and the left conductive component and the right conductive component being symmetrically arranged.

[0005] Preferably, the aluminum support and heat dissipation component comprises a support and two symmetrically arranged heat dissipation rib surfaces, the heat dissipation rib surfaces are provided with first threaded holes for fixing the left conductive component and the right conductive component through the connecting bolts, and the support is provided with a support rod threaded mounting hole for connecting the support rod.

[0006] Preferably, the support is provided with a spare threaded hole for matching and installing an auxiliary flexible connection.

[0007] Preferably, the bracket is provided with an external connecting hole connected with the support insulator.

[0008] Preferably, the left conductive member comprises a left conductive member body and a left busbar lap joint surface connected with the busbar, the left conductive member is provided with a left fixing hole connected with the aluminum support heat dissipation component, and the left conductive member is provided with a left mounting hole connected with the flexible connection.

[0009] Preferably, the right conductive member comprises a right conductive member body and a right busbar lap joint surface connected with the busbar, the right conductive member is provided with a right fixing hole connected with the aluminum support heat dissipation component, and the right conductive member is provided with a right mounting hole connected with the flexible connection.

[0010] Preferably, the left conductive member and the right conductive member are formed by the same die forging.

[0011] The left conductive member and the right conductive member are respectively connected to the left and right sides of the aluminum support heat dissipation component through the fixing connection bolts, and each side is connected by 6 bolts, so that the connection is reliable and the stress is reasonable. After connection, the current carrying capacity of the whole component is mainly borne by the left main conductive member and the right conductive member, the current flows into the left conductive member and the right conductive member from the vacuum interrupter through the conductive rod and the two side flexible connections, and then flows out to the lap busbar through the busbar lap joint surface. The aluminum support heat dissipation component mainly bears the longitudinal impact force when the vacuum interrupter is closed and opened, and dissipates heat through the large-area heat dissipation ribs on the surface, thereby improving the current carrying capacity. BRIEF DESCRIPTION OF DRAWINGS

[0012] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0013] Figure 1 is a schematic view of a main circuit of a split type lightweight lower support of a circuit breaker.

[0014] Figure 2 is a schematic view of a lower support assembly in a split type lightweight lower support of a circuit breaker.

[0015] Figure 3 is a schematic view of a lower support assembly in a split type lightweight lower support of a circuit breaker from a second perspective.

[0016] Figure 4 is a front view of a lower support assembly in a split type lightweight lower support of a circuit breaker.

[0017] Figure 5 is a schematic view of an aluminum support heat dissipation component in a split type lightweight lower support of a circuit breaker.

[0018] Figure 6It is a second perspective view of the structure of the aluminum support heat dissipation component in the split type lightweight lower support of the circuit breaker.

[0019] Figure 7 It is a structure schematic view of the left conductive member in the split type lightweight lower support of the circuit breaker.

[0020] Figure 8 It is a structure schematic view of the right conductive member in the split type lightweight lower support of the circuit breaker.

[0021] In the figure: 1-aluminum support heat dissipation component, 101-support rod threaded mounting hole, 102-heat dissipation rib surface, 103-first threaded hole, 104-external hole, 105-backup threaded hole, 2-left conductive member, 201-left fixed hole, 202-left busbar lap surface, 203-left mounting hole, 3-right conductive member, 301-right fixed hole, 302-right busbar lap surface, 303-right mounting hole, 4-connection bolt, 5-upper support assembly, 6-vacuum arc-extinguishing chamber, 7-support rod, 8-soft connection, 9-lower support assembly. DETAILED DESCRIPTION

[0022] The split type lightweight lower support of the circuit breaker comprises an upper support assembly 5, a lower support assembly 9, a support rod 7 connected with the upper support assembly 5 and the lower support assembly 9 respectively, a vacuum arc-extinguishing chamber 6 located in the area surrounded by the upper support assembly 5, the lower support assembly 9 and the support rod 7, a soft connection 8 provided on the lower support assembly 9 and connected with the vacuum arc-extinguishing chamber 6, the lower support assembly 9 comprising an aluminum support heat dissipation component 1, a left conductive member 2 and a right conductive member 3 connected with the aluminum support heat dissipation component 1 through connection bolts 4 respectively, and the left conductive member 2 and the right conductive member 3 are symmetrically arranged. The left conductive member 2 and the right conductive member 3 are connected to the left and right sides of the aluminum support heat dissipation component 1 through fixed connection bolts 4 respectively, and there are 6 bolts on each side, which are reliable in connection and reasonable in stress. After connection, the overall component mainly bears the current by the left main conductive member and the right conductive member 3, the current flows from the vacuum arc-extinguishing chamber 6 to the left conductive member 2 and the right conductive member 3 through the conductive rod and the soft connection 8 on both sides, and then flows out to the lap busbar through the busbar lap surface. The aluminum support heat dissipation component 1 mainly bears the longitudinal impact force when the vacuum arc-extinguishing chamber 6 is closed and opened, and dissipates heat through the large-area heat dissipation ribs on its surface, thereby improving the current carrying capacity. After the split type lightweight lower support assembly 9 of the circuit breaker is assembled, it is connected with the vacuum arc-extinguishing chamber 6 through the soft connection 8, the static end of the vacuum arc-extinguishing chamber 6 is connected with the upper support assembly 5, the split type lightweight lower support assembly 9 of the circuit breaker is connected and fixed with the upper support assembly 5 through the support rod 7, and the main circuit of the circuit breaker is formed.

[0023] The aluminum support heat dissipation component 1 comprises a support, two symmetrical support fins 102 arranged on the support, a first threaded hole 103 arranged on the support fin 102 and fixed with the left and right conductive members 2 and 3 through the connecting bolt 4, and a support rod threaded mounting hole 101 arranged on the support and used for connecting the support rod 7. The support is provided with a spare threaded hole 105 used for matching installation of the auxiliary flexible connection 8, and the four spare threaded holes 105 designed on the support can be used for connecting the spare flexible connection 8 to improve the current carrying capacity. The support is provided with an external connection hole 104 connected with the support insulator, and the aluminum support heat dissipation component 1 can be installed on the insulator through the external connection hole 104 behind the aluminum support heat dissipation component 1.

[0024] The left conductive member 2 comprises a left conductive member 2 body, a left bus lap joint surface 202 connected with the bus, a left fixed hole 201 arranged on the left conductive member 2 and connected with the aluminum support heat dissipation component 1, and a left mounting hole 203 arranged on the left conductive member 2 and connected with the flexible connection 8. The right conductive member 3 comprises a right conductive member 3 body, a right bus lap joint surface 302 connected with the bus, a right fixed hole 301 arranged on the right conductive member 3 and connected with the aluminum support heat dissipation component 1, and a right mounting hole 303 arranged on the right conductive member 3 and connected with the flexible connection 8. The left and right conductive members 2 and 3 are formed by forging with the same mold, and are processed into finished products after forging with the mold, thereby reducing the mold investment cost.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited technical solutions. Those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions, and should be covered in the scope of the claims of the present application.

Claims

1. A split-type lightweight lower support for circuit breakers, characterized in that: The circuit breaker split-type lightweight lower support includes an upper support assembly, a lower support assembly, and a support rod connecting the upper support assembly and the lower support assembly respectively. The vacuum interrupter is located in the area enclosed by the upper support assembly, the lower support assembly, and the support rod. The lower support assembly is provided with a flexible connection connected to the vacuum interrupter. The lower support assembly includes an aluminum support heat dissipation component, a left conductive component and a right conductive component connected to the aluminum support heat dissipation component by connecting bolts respectively. The left conductive component and the right conductive component are symmetrically arranged. The aluminum support heat dissipation component includes a bracket and two symmetrically arranged heat dissipation ribs. The heat dissipation ribs are provided with first threaded holes that are fixed to the left conductive component and the right conductive component by the connecting bolts. The bracket is provided with a support rod threaded mounting hole for connecting to the support rod. The left conductive component includes a left conductive component body and a left busbar lap surface connected to the busbar. The left conductive component is provided with a left fixing hole connected to the aluminum support heat dissipation component, and a left mounting hole connected to the flexible connection. The right conductive component includes a right conductive component body and a right busbar lap surface connected to the busbar. The right conductive component is provided with a right fixing hole for connecting to an aluminum support heat dissipation component, and a right mounting hole for connecting to a flexible connector.

2. The lightweight split-type lower support for circuit breakers as described in claim 1, characterized in that: The bracket is provided with spare threaded holes for the installation of auxiliary flexible connections.

3. The lightweight split-type lower support for circuit breakers as described in claim 1, characterized in that: The bracket is provided with an external connection hole for connecting to the supporting insulator.

4. The lightweight split-type lower support for circuit breakers as described in claim 1, characterized in that: The left and right conductive components are forged using the same mold.

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