Vacuum arc-extinguishing chamber for ring main unit

Abstract

The utility model discloses a vacuum arc extinguish chamber for a ring main unit, which comprises a vacuum shell, the outer wall of the vacuum shell is fixedly connected with a wire inlet end and a wire outlet end respectively along the axial direction, and an installation cavity is arranged in the vacuum shell. A static contact mechanism, an arc extinguishing mechanism, a moving contact mechanism, a corrugated pipe and a linkage shaft are sequentially arranged in the installation cavity in the axial direction, the wire inlet end is connected with the static contact mechanism, and the wire outlet end is connected with the moving contact mechanism. The arc extinguishing mechanism is located between the static contact mechanism and the moving contact mechanism and connected with the static contact mechanism and the moving contact mechanism, the top of the corrugated pipe is connected to the bottom of the moving contact mechanism, and the universal driving shaft is fixedly connected with the surface of the bottom of the corrugated pipe. In combination with the structural design of the vacuum arc-extinguishing chamber, the vacuum arc-extinguishing chamber is compact in structural design, can be used under the condition of large rated current in the using process, meets the high-frequency on-off requirement, prolongs the service life of the vacuum arc-extinguishing chamber, and is better in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum interrupter chambers, in particular to a vacuum interrupter chamber for a ring network cabinet. Background Art

[0002] The vacuum interrupter, also known as the vacuum switch tube, is the core component of medium and high voltage power switches. Its main function is to quickly extinguish the arc and suppress the current after the medium and high voltage circuit is cut off from the power supply through the excellent insulation performance of the vacuum in the tube, so as to avoid accidents. It is mainly used in power transmission and distribution control systems, and also in power distribution systems such as metallurgy, mining, petroleum, chemical industry, railways, broadcasting, communications, and industrial high-frequency heating. It has the characteristics of energy saving, material saving, fire prevention, explosion prevention, small size, long life, low maintenance cost, reliable operation and no pollution.

[0003] However, the vacuum interrupter used in the existing ring network cabinet has a relatively simple structural design. During use, the electrical life of the vacuum interrupter is only a few hundred times, and the number of full-capacity breaking times is only dozens of times, which cannot meet the requirements of long electrical life and high-frequency breaking. Summary of the invention

[0004] The purpose of the utility model is to provide a vacuum arc extinguishing chamber for a ring network cabinet, so as to solve the problem that the vacuum arc extinguishing chamber used in the existing ring network cabinet mentioned in the above background technology has a relatively simple structural design, and the electrical life of the vacuum arc extinguishing chamber is only a few hundred times during use, and the number of full-capacity breaking times is only dozens of times, which cannot meet the requirements of long electrical life and high-frequency breaking.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vacuum arc extinguishing chamber for a ring network cabinet, comprising a vacuum shell, the outer wall of the vacuum shell is fixedly connected with an incoming line end and an outgoing line end along the axial direction, an installation cavity is opened in the vacuum shell, and a static contact mechanism, an arc extinguishing mechanism, a moving contact mechanism, a bellows and a linkage shaft are arranged in sequence along the axial direction in the installation cavity, an installation platform is fixedly connected to the inner wall of the installation cavity at a relative position between the incoming line end and the outgoing line end, and a static contact mechanism and a moving contact mechanism are fixedly installed on two installation platforms respectively, the incoming line end is connected to the static contact mechanism, and the outgoing line end is connected to the moving contact mechanism, the arc extinguishing mechanism is located between the static contact mechanism and the moving contact mechanism and is connected to the static contact mechanism and the moving contact mechanism, the top of the bellows is connected to the bottom of the moving contact mechanism, and the linkage shaft is fixedly connected to the bottom surface of the bellows.

[0006] Preferably, the static contact mechanism comprises a static contact and a heat dissipation component, the heat dissipation component is arranged on the top of the static contact, the static contact is connected to the incoming line end, and the middle part of the static contact is sleeved on the top of the arc extinguishing mechanism.

[0007] Preferably, the moving contact mechanism comprises a moving contact and a heat sink, the top of the moving contact surface is connected to the arc extinguishing mechanism, the moving contact surface is fixedly connected with a heat sink by bolts around, and one end surface of the moving contact is connected to the outlet terminal.

[0008] Preferably, the heat dissipation assembly comprises a fixing seat and heat dissipation fins, the fixing seat is fixedly connected to the top surface of the stationary contact, and a plurality of heat dissipation fins are fixedly mounted on the outer wall of the fixing seat.

[0009] Preferably, the top surface of the bellows is connected to the moving contact through a threaded rod.

[0010] Preferably, a positioning hole is provided at the center of the bottom surface of the linkage shaft.

[0011] Beneficial Effects

[0012] Compared with the existing technology, the beneficial effects of the utility model are:

[0013] Combined with the structural design of the utility model, the structural design is compact, and during use, it can be used under the condition of large rated current and meet the high-frequency breaking requirements, while also improving the service life of the vacuum arc extinguishing chamber and having better practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0016] 1. Vacuum housing; 2. Inlet terminal; 3. Outlet terminal; 4. Installation cavity; 5. Static contact mechanism;

[0017] 6. Arc extinguishing mechanism; 7. Moving contact mechanism; 8. Bellows; 9. Linkage shaft; 41 Installation platform;

[0018] 51. static contact; 52. heat dissipation assembly; 71. moving contact; 72. heat sink; 81. threaded rod; 91. positioning hole; 521. heat dissipation fin; 522. fixing seat. DETAILED DESCRIPTION

[0019] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore are not to be construed as limiting the present invention. In addition, the terms "first", "second" and "third" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance.

[0021] like Figure 1-2 It is a schematic structural diagram of a vacuum interrupter for a ring network cabinet in a preferred embodiment of the utility model. In this embodiment, a vacuum interrupter for a ring network cabinet comprises a vacuum shell 1, and an incoming line terminal 2 and an outgoing line terminal 3 are fixedly connected to the outer wall of the vacuum shell 1 along the axial direction, and an installation cavity 4 is opened in the vacuum shell 1. A static contact mechanism 5, an arc extinguishing mechanism 6, a moving contact mechanism 7, a bellows 8 and a linkage shaft 9 are arranged in sequence along the axial direction in the installation cavity 4, and an installation platform 41 is fixedly connected to the inner wall of the installation cavity 4 at a relative position between the incoming line terminal 2 and the outgoing line terminal 3, and the installation platform 41 is provided for the installation of the static contact mechanism 5 and the moving contact mechanism 7, and the two installation platforms 41 are respectively A static contact mechanism 5 and a moving contact mechanism 7 are fixedly installed, the incoming line terminal 2 is connected to the static contact mechanism 5, and the outgoing line terminal 3 is connected to the moving contact mechanism 7. At the same time, the arc extinguishing mechanism 6 is located between the static contact mechanism 5 and the moving contact mechanism 7, and the top and bottom of the arc extinguishing mechanism 6 are respectively connected to the static contact mechanism 5 and the moving contact mechanism 7, and the top of the bellows 8 is connected to the bottom of the moving contact mechanism 7, and the linkage shaft 9 is fixedly connected to the bottom surface of the bellows 8. Combined with the structural design of the utility model, its structural design is compact. During use, it can be used under large rated current and meet high-frequency breaking requirements. At the same time, it also improves the service life of the vacuum arc extinguishing chamber and has better practicality.

[0022] In this embodiment, the static contact mechanism 5 includes a static contact 51 and a heat dissipation assembly 52. ​​The heat dissipation assembly 52 is arranged on the top of the static contact 51. The static contact 51 is connected to the incoming line terminal 2. Since a large amount of heat will be generated during the breaking process of large rated current and high frequency, the static contact 51 is cooled by the heat dissipation assembly 52. ​​The middle part of the static contact 51 is sleeved on the top of the arc extinguishing mechanism 6.

[0023] In this embodiment, the moving contact mechanism 7 includes a moving contact 71 and a heat sink 72. The top of the moving contact 71 is connected to the arc extinguishing mechanism 6, so that the arc generated during the breaking process of the moving contact 71 can be absorbed by the conduction plate in the arc extinguishing mechanism 6, thereby achieving more effective arc extinguishing treatment; the heat sink 72 is fixedly connected to the surface of the moving contact 71 by bolts around it, and the heat dissipation of the moving contact 71 is dissipated by the heat sink 72, and one end face of the moving contact 71 is connected to the outlet terminal 3.

[0024] In this embodiment, the heat dissipation assembly 52 includes a fixed seat 522 and heat dissipation fins 521. The fixed seat 522 is fixedly connected to the top surface of the static contact 51. A plurality of heat dissipation fins 521 are fixedly installed on the outer wall of the fixed seat 522. Heat is conducted through the heat dissipation fins 521 to prevent heat from accumulating on the surface of the static contact 51.

[0025] In this embodiment, the top surface of the bellows 8 is connected to the moving contact 71 via a threaded rod 81 . The bellows 8 controls the movement of the moving contact 71 , and the contacting threaded rod 81 drives the moving end contact 34 to lift.

[0026] In this embodiment, a positioning hole 91 is provided at the center of the bottom surface of the linkage shaft 9 to serve as a guide and facilitate installation.

[0027] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A vacuum interrupter for a ring main unit, comprising a vacuum housing (1), characterized in that: The outer wall of the vacuum housing (1) is fixedly connected to an inlet terminal (2) and an outlet terminal (3) along the axial direction, and a mounting cavity (4) is provided in the vacuum housing (1). A static contact mechanism (5), an arc extinguishing mechanism (6), a moving contact mechanism (7), a bellows (8) and a linkage shaft (9) are arranged in sequence in the mounting cavity (4) along the axial direction. An mounting platform (41) is fixedly connected to the inner wall of the mounting cavity (4) at a position relative to the inlet terminal (2) and the outlet terminal (3), and the two mounting platforms (41) are connected to the mounting cavity (4). ) are respectively fixedly installed with a static contact mechanism (5) and a moving contact mechanism (7), the incoming line end (2) is connected to the static contact mechanism (5), the outgoing line end (3) is connected to the moving contact mechanism (7), the arc extinguishing mechanism (6) is located between the static contact mechanism (5) and the moving contact mechanism (7) and is connected to the static contact mechanism (5) and the moving contact mechanism (7), the top of the bellows (8) is connected to the bottom of the moving contact mechanism (7), and the linkage shaft (9) is fixedly connected to the bottom surface of the bellows (8).

2. According to claim 1, a vacuum interrupter for a ring main unit, characterized in that: The stationary contact mechanism (5) comprises a stationary contact (51) and a heat dissipation component (52), wherein the heat dissipation component (52) is arranged on the top of the stationary contact (51), the stationary contact (51) is connected to the incoming line terminal (2), and the middle part of the stationary contact (51) is sleeved on the top of the arc extinguishing mechanism (6).

3. According to claim 1, a vacuum interrupter for a ring main unit, characterized in that: The moving contact mechanism (7) comprises a moving contact (71) and a heat sink (72); the top of the surface of the moving contact (71) is connected to the arc extinguishing mechanism (6); the heat sink (72) is fixedly connected to the surface of the moving contact (71) by bolts; and one end surface of the moving contact (71) is connected to the outlet terminal (3).

4. According to claim 2, a vacuum interrupter for a ring main unit, characterized in that: The heat dissipation assembly (52) comprises a fixing seat (522) and heat dissipation fins (521); the fixing seat (522) is fixedly connected to the top surface of the stationary contact (51); and a plurality of heat dissipation fins (521) are fixedly mounted on the outer wall of the fixing seat (522).

5. According to claim 1, a vacuum interrupter for a ring main unit, characterized in that: The top surface of the bellows (8) is connected to the moving contact (71) via a threaded rod (81).

6. The vacuum interrupter for a ring main unit according to claim 1, characterized in that: A positioning hole (91) is provided at the center of the bottom surface of the linkage shaft (9).

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