A pole and a circuit breaker

Abstract

The application discloses a pole and a circuit breaker, wherein the pole comprises an epoxy pouring part and a pole body, and at least two groups of cavity groups for accommodating the pole body are arranged in the epoxy pouring part, and each cavity group is provided with one pole body. The pole assembled by the epoxy pouring part formed by one-piece pouring molding can solve the problem of mechanical performance reduction after the miniaturization design of the circuit breaker, improve the impact force during the electric power and mechanical operation of the circuit breaker, and improve the phase-to-phase insulation and heat dissipation of the circuit breaker.

Description

Technical Field

[0001] This invention relates to the field of electrical system technology, and in particular to a pole and circuit breaker. Background Technology

[0002] In the field of medium-voltage gas-insulated switchgear technology, most mainstream products currently employ a box-type metal-enclosed structure using SF6 (sulfur hexafluoride) as the insulating medium and a vacuum interrupter as the breaking element. However, SF6 is a greenhouse gas, and under the current national emphasis on energy conservation and environmental protection, its use needs to be gradually reduced or even eliminated, replaced by environmentally friendly gases such as clean air or nitrogen. Using clean air or nitrogen requires higher filling pressures, but box-type gas-insulated switchgear is only suitable for slightly positive pressure filling. Therefore, the metal-enclosed pressure vessel used in environmentally friendly gas-insulated switchgear can only adopt a cylindrical tank structure. The internal space of a cylindrical environmentally friendly gas-insulated switchgear is smaller than that of a box-type container, resulting in a more challenging internal structural design for the tank-type environmentally friendly gas-insulated switchgear.

[0003] Therefore, how to provide a pole that is not only suitable for the structural design of compact circuit breakers in tank-type environmentally friendly gas-filled switchgear, but also solves the technical problems of decreased mechanical performance and phase-to-phase insulation after the miniaturization of circuit breakers is a technical problem that urgently needs to be solved in the direction of environmental protection product technology. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a pole that can solve the problem of decreased mechanical performance after miniaturization of circuit breakers, improve the electrodynamic forces between phases of the circuit breaker and the impact force during mechanical operation, and at the same time improve the phase-to-phase insulation problem of the circuit breaker.

[0005] Another object of the present invention is to provide a circuit breaker.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An electrode post includes an epoxy casting and an electrode post body. The epoxy casting has at least two sets of cavities for accommodating the electrode post body, and each set of cavities has one electrode post body.

[0008] Preferably, the epoxy casting includes an epoxy casting body and a conductor insert;

[0009] The epoxy casting body is provided with flanges at both ends, and an epoxy connecting plate is provided in the middle of the epoxy casting body;

[0010] The conductive insert is fixedly disposed in the epoxy connecting plate. The inner hole of the conductive insert is connected to the cavity assembly on both sides. The mounting surface of the conductive insert extends from the outer surface of the epoxy casting body for connection with the incoming conductor.

[0011] Preferably, the cavity assembly includes a first cavity and a second cavity, and the inner hole of the conductor insert is parallel to or coaxial with the axis of the first cavity or the second cavity;

[0012] Preferably, the outer surface of the conductor insert is wrapped with an epoxy casting material, and the wrapped epoxy casting material is provided with protrusions at both ends of the conductor insert.

[0013] Preferably, the first cavity in each of two adjacent sets of cavity groups is interconnected, and the second cavity in each of two adjacent sets of cavity groups is interconnected.

[0014] Preferably, the second cavity is provided with a second ventilation hole, and / or the first cavity is provided with a first ventilation hole.

[0015] Preferably, the outer diameter of the second cavity is larger than the outer diameter of the first cavity.

[0016] The pole body includes an insulating tie rod, a conductor, and a vacuum interrupter;

[0017] The insulating pull rod is placed inside the first cavity;

[0018] The conductor is placed in the inner cavity of the conductor insert and is slidably electrically connected to the conductor insert;

[0019] The vacuum interrupter is placed inside the second cavity. The moving end of the vacuum interrupter can be connected to the insulating pull rod through the conductor. The stationary end of the vacuum interrupter is connected to the stationary end conductor, and the stationary end conductor is fixedly connected to the flange on the side of the second cavity.

[0020] A circuit breaker comprising a pole as described in any of the preceding claims.

[0021] Preferably, it further includes an incoming conductor, an outgoing conductor, and a sealing plate. The incoming conductor is connected to the conductor insert, the outgoing conductor is electrically connected to the stationary conductor, and the sealing plate has the pole on one side and an operating mechanism for installing the circuit breaker on the other side.

[0022] As can be seen from the above technical solutions, the pole disclosed in this invention includes an epoxy casting and a pole body. The epoxy casting contains at least two sets of cavities for accommodating the pole body, with each cavity set housing one pole body. The pole assembled from the integrally cast epoxy casting can solve the problem of decreased mechanical performance after miniaturization of circuit breakers, improve the electrodynamic forces between phases and the impact forces during mechanical operation, and simultaneously improve the phase-to-phase insulation of circuit breakers. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the forward isometric structure of the pole post disclosed in the embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the rear-view isometric structure of the pole post disclosed in the embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the transverse cross-sectional structure of the pole disclosed in the embodiment of the present invention;

[0027] Figure 4 This is a longitudinal sectional view of the epoxy casting disclosed in the embodiments of the present invention;

[0028] Figure 5 This is a schematic cross-sectional view of the epoxy casting disclosed in the embodiments of the present invention;

[0029] Figure 6 This is a schematic diagram of the longitudinal cross-sectional structure of the circuit breaker disclosed in the embodiment of the present invention;

[0030] Figure 7 This is a rear-view isometric structural diagram of the internal structure of the circuit breaker disclosed in an embodiment of the present invention;

[0031] Figure 8 This is a rear view schematic diagram of the internal structure of the circuit breaker disclosed in the embodiment of the present invention.

[0032] The names of the components are as follows:

[0033] 100 is an epoxy casting, 101 is an epoxy casting body, 1011 is the first cavity, 1011-a is the first ventilation hole, 1011-b is a groove, 1012 is the second cavity, 1012-a is the second ventilation hole, 102 is a conductor insert, 1021 is a protrusion, 103 is a flange, 104 is an epoxy connecting plate, 200 is the pole body, 201 is an insulating pull rod, 202 is a conductor, 203 is a vacuum interrupter, 300 is the inlet conductor, 400 is the outlet conductor, 500 is the stationary conductor, and 600 is a sealing plate. Detailed Implementation

[0034] In view of this, the core of the present invention is to provide a pole that can be used in the structural design of a compact circuit breaker for a tank-type environmentally friendly gas-filled switchgear. This can solve the problem of decreased mechanical performance after the miniaturization of the circuit breaker, improve the electrodynamic force between phases and the impact force during mechanical operation, and at the same time improve the phase-to-phase insulation problem of the circuit breaker.

[0035] Another object of the present invention is to provide a circuit breaker.

[0036] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Please refer to... Figures 1 to 8 .

[0037] Please refer to Figure 1 and Figure 2 The pole disclosed in this embodiment of the invention includes an epoxy casting 100 and a pole body 200. The epoxy casting 100 contains at least two sets of cavities for accommodating the pole body 200, with each set of cavities housing one pole body 200. The pole assembled from the integrally cast epoxy casting 100 can solve the problem of decreased mechanical performance after miniaturization of circuit breakers, improve the electrodynamic forces between phases and the impact forces during mechanical operation, and simultaneously improve the phase-to-phase insulation of the circuit breaker.

[0038] It should be noted that the epoxy casting 100 includes an epoxy casting body 101 and a conductor insert 102; wherein the epoxy casting body 101 has flange portions 103 at both ends, an epoxy connecting plate 104 is provided in the middle of the epoxy casting body 101, the conductor insert 102 is fixedly disposed in the epoxy connecting plate 104, the inner hole of the conductor insert 102 is connected to the cavity assembly on both sides, and the mounting surface of the conductor insert 102 extends from the outer surface of the epoxy casting body 101 for connection with the incoming conductor. The above-mentioned integrated casting structure can solve the structural stress problem under small phase spacing.

[0039] It should be explained that a through hole is provided on the epoxy casting body 101 at the position corresponding to the conductor insert 102, and the mounting surface of the conductor insert 102 can extend out from the through hole of the epoxy casting body 101 to connect with the incoming conductor 300.

[0040] It should be further explained that each flange 103 is provided with three through holes, and the through holes on two flanges 103 are arranged in pairs. The two ends of one set of cavities are respectively located in two corresponding through holes. The flange 103 configuration can improve the overall stress level and interphase insulation performance of the pole.

[0041] The present invention does not specifically limit the structure of the epoxy casting body 101. The epoxy casting body 101 can be a hollow flat cylindrical structure, a hollow rectangular structure, or other structures. Any structure that meets the requirements of the present invention is within the protection scope of the present invention.

[0042] In this embodiment of the invention, the epoxy casting body 101 is preferably a flat cylindrical, hollow structure integrally cast.

[0043] Please refer to the following for details. Figures 3 to 5 The pole disclosed in the embodiments of the present invention includes a cavity assembly comprising a first cavity 1011 and a second cavity 1012. The inner hole of the conductor insert 102 is parallel to or coaxial with the axis of the first cavity 1011 or the second cavity 1012. This arrangement simplifies the structure of the pole.

[0044] It should be further explained that the outer surface of the conductor insert 102 is wrapped with epoxy casting material, and protrusions 1021 are respectively provided at both ends of the conductor insert 102. The protrusions 1021 form an epoxy shield, which effectively reduces the electric field strength and further improves the phase-to-phase insulation performance of the pole.

[0045] To further optimize the above embodiments, in the pole disclosed in the embodiments of the present invention, the first cavity 1011 in each of two adjacent cavity groups is interconnected, and the second cavity 1012 in each of two adjacent cavity groups is interconnected.

[0046] The above-mentioned structural arrangement, in which the two adjacent sets of first cavities 1011 are interconnected and the two adjacent sets of second cavities 1012 are interconnected, can further improve the phase-to-phase insulation performance of the circuit breaker.

[0047] In order to improve the flow of hot air and further improve the heat dissipation performance of the electrode when a large current flows through it, the electrode disclosed in the embodiments of the present invention is provided with ventilation holes for ventilation and heat dissipation of the electrode.

[0048] The ventilation holes can be set in various ways. Specifically, in the first cavity 1011 and the second cavity 1012 disclosed in the embodiments of the present invention, the second ventilation hole 1012-a can be set only on the second cavity 1012, or the first ventilation hole 1011-a can be set only on the first cavity 1011.

[0049] Of course, while providing a second ventilation hole 1012-a on the second cavity 1012, a first ventilation hole 1011-a can also be provided on the first cavity 1011. Those skilled in the art can choose any of the above-mentioned configuration methods according to actual needs.

[0050] It should be noted that two first ventilation holes 1011-a are preferably provided, and are respectively provided at the top and bottom of the first cavity 1011. Two second ventilation holes 1012-a are also preferably provided, and are respectively provided at the top and bottom of the second cavity 1012. With this arrangement, the first ventilation holes 1011-a connect the top and bottom of the first cavity 1011, and the second ventilation holes 1012-a connect the top and bottom of the second cavity 1012. Therefore, hot air can flow up and down, thereby effectively improving the heat dissipation performance of the pole.

[0051] The outer diameters of the first cavity 1011 and the second cavity 1012 disclosed in the embodiments of the present invention can be set to be the same or different. The outer diameter of the first cavity 1011 can be larger than the outer diameter of the second cavity or smaller than the outer diameter of the second cavity 1012. The embodiments of the present invention do not limit the specific dimensions of the outer diameters of the first cavity 1011 and the second cavity 1012. Any structure that meets the requirements of the present invention is within the protection scope of the present invention.

[0052] To further optimize the above embodiments, in the pole structure disclosed in the embodiments of the present invention, it is preferable that the outer diameter of the second cavity 1012 is larger than the outer diameter of the first cavity 1011. This setting can reduce the height of the mounting surface of the incoming conductor 300 and the conductor insert 102, optimize the layout of the incoming conductor 300 in the circuit breaker, reduce the overall height of the circuit breaker module, and thus realize the miniaturization design of the circuit breaker.

[0053] Of course, to further optimize the above embodiments, the epoxy casting body 101 disclosed in this embodiment of the invention is also provided with a groove 1011-b. The embodiments of the invention do not specifically limit the location of the groove 1011-b; any structure that meets the usage requirements of this invention is within the protection scope of this invention. Those skilled in the art can select the groove according to actual needs. Preferably, the groove 1011-b is located on the outer wall of the epoxy casting body 101. This arrangement can effectively improve the overall stress level of the pole.

[0054] The pole body 200 disclosed in the embodiments of the present invention includes an insulating pull rod 201, a conductor 202, and a vacuum interrupter 203.

[0055] Please refer to Figure 3In the disclosed specific arrangement, the insulating pull rod 201 is placed inside the first cavity 1011; the conductor 202 is placed inside the conductor insert 102 and is slidably electrically connected to the conductor insert 102; the vacuum interrupter 203 is placed inside the second cavity 1012, the moving end of the vacuum interrupter 203 can be connected to the insulating pull rod 201 through the conductor 202, the stationary end of the vacuum interrupter 203 is connected to the stationary end conductor 500, and the stationary end conductor is fixedly connected to the flange portion 103 provided on the side of the second cavity 1012.

[0056] This invention also discloses a circuit breaker, including a pole as disclosed in any of the above embodiments.

[0057] Since the circuit breaker described above uses the pole disclosed in the embodiments of the present invention, the circuit breaker also possesses the technical advantages of the pole described above. The embodiments of the present invention will not elaborate on these advantages further.

[0058] Please refer to Figures 6 to 8 The circuit breaker disclosed in this embodiment of the invention further includes an incoming conductor 300, an outgoing conductor 400, and a sealing plate 600. The incoming conductor 300 is connected to the conductor insert 102, the outgoing conductor 400 is electrically connected to the stationary conductor 500, and a pole post is provided on one side of the sealing plate 600. An operating mechanism for installing the circuit breaker is provided on the other side of the sealing plate 600. This configuration conforms to the existing gas-insulated switchgear transmission and sealing solutions.

[0059] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0061] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electrode post, characterized in that, It includes an epoxy casting and an electrode body. The epoxy casting has at least two sets of cavities for accommodating the electrode body, and each set of cavities has one electrode body. The epoxy casting is integrally cast; The epoxy casting includes an epoxy casting body and a conductor insert; the epoxy casting body has flange portions at both ends and an epoxy connecting plate in the middle; the conductor insert is fixedly disposed in the epoxy connecting plate, and the inner hole of the conductor insert is connected to the cavity assembly on both sides; a through hole is opened on the epoxy casting body at a position corresponding to the conductor insert, and the mounting surface of the conductor insert extends from the outer surface of the epoxy casting body for connection with the incoming conductor; The outer surface of the conductor insert is covered with epoxy casting material, and the epoxy casting material covering the conductor insert has protrusions at both ends.

2. The pole post according to claim 1, characterized in that, The cavity assembly includes a first cavity and a second cavity, and the inner hole of the conductor insert is parallel to or coaxial with the axis of the first cavity or the second cavity.

3. The pole post according to claim 2, characterized in that, The first cavity in each pair of adjacent cavity groups is interconnected, and the second cavity in each pair of adjacent cavity groups is interconnected.

4. The electrode post according to claim 3, characterized in that, The second cavity is provided with a second ventilation hole, and / or the first cavity is provided with a first ventilation hole.

5. The electrode post according to claim 4, characterized in that, The outer diameter of the second cavity is larger than the outer diameter of the first cavity.

6. The electrode post according to claim 5, characterized in that, The pole body includes an insulating tie rod, a conductor, and a vacuum interrupter; The insulating pull rod is placed inside the first cavity; The conductor is placed in the inner cavity of the conductor insert and is slidably electrically connected to the conductor insert; The vacuum interrupter is placed inside the second cavity. The moving end of the vacuum interrupter can be connected to the insulating pull rod through the conductor. The stationary end of the vacuum interrupter is connected to the stationary end conductor, and the stationary end conductor is fixedly connected to the flange on the side of the second cavity.

7. A circuit breaker, characterized in that, Includes the pole as described in any one of claims 1-6.

8. The circuit breaker according to claim 7, characterized in that, It also includes an incoming conductor, an outgoing conductor, and a sealing plate. The incoming conductor is connected to the conductor insert, the outgoing conductor is electrically connected to the stationary conductor, the sealing plate has the pole on one side, and the sealing plate has an operating mechanism for installing the circuit breaker on the other side.

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