GIS direct-acting circuit breaker

Abstract

The utility model belongs to the technical field of circuit breakers, and discloses a GIS (gas insulated switchgear) direct-acting circuit breaker, which aims to solve the problems that a circuit breaker for a GIS in the prior art is large in size, large in occupied area, inflexible in assembly and easy to cause three-phase asynchronous faults, and an operating mechanism is arranged on the outer side of a shell, so that the internal space of the shell is saved; the operating mechanism and the arc extinguish chamber are connected through the transmission rod, the circuit breaker can be made to be smaller in size, the occupied area is reduced, the three-phase different-period failure rate is reduced, the length of the straight-through cylinder can be determined according to the actual stroke requirement, the size of the circuit breaker can be adjusted more flexibly, production and transportation are facilitated, and the production efficiency is improved. And the requirement on the installation space of the circuit breaker is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers and relates to a GIS direct-acting circuit breaker. Background Art

[0002] Gas-insulated metal-enclosed switchgear (GIS), a type of equipment with circuit breakers as the primary switch, is used in primary power distribution systems with voltage levels of 3kV or higher. This high-voltage electrical equipment utilizes GIS insulation and sealing technologies to house high-voltage components within a sealed, box-shaped container, which is then filled with insulating gas at slightly above atmospheric pressure. Utilizing modern, advanced processing techniques, this complete product series provides control, protection, measurement, monitoring, and communication functions for power distribution, both under normal and fault conditions.

[0003] With the accelerating pace of urbanization in China, urban electricity load is rapidly increasing, necessitating the construction of more urban substations in many large and medium-sized cities. As a crucial component of urban power grid construction, 252kV GIS equipment needs to be more compact and miniaturized to meet the demands of urban substation construction, reduce land use, and reduce total substation costs.

[0004] The 252kV GIS circuit breaker still uses a complex crankcase transmission system, which requires numerous components and is costly. Furthermore, this upgrade lacks a three-phase mechanically linked circuit breaker with a spring mechanism. The phase-splitting mechanism occupies a large area, is inflexible to assemble, and is prone to out-of-phase failures. Utility Model Content

[0005] The utility model aims to solve the problems in the prior art of GIS circuit breakers being large in size, occupying a large area, being inflexible in assembly and prone to three-phase out-of-phase failures, and to provide a GIS direct-acting circuit breaker.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A GIS direct-acting circuit breaker comprises a housing, an operating mechanism is provided at one end of the housing, an arc extinguishing chamber is provided inside the housing, and a through cylinder is provided between the housing and the operating mechanism;

[0008] It also includes a transmission rod, which passes through the straight-through cylinder. One end of the transmission rod extends into the shell and is connected to the arc extinguishing chamber, and the other end is connected to the driving end of the operating mechanism.

[0009] The further improvement of the present invention is:

[0010] A flat cover is provided at the connection end between the shell and the straight cylinder, and an end cover is provided at the other end of the shell;

[0011] The flat cover plate is provided with a through hole, and the transmission rod passes through the through hole on the flat cover plate.

[0012] An annular groove is provided at the connecting end of the straight-through cylinder and the flat cover plate, and a sealing ring is provided in the annular groove.

[0013] A sealing seat is provided in the through hole, and the transmission rod passes through the sealing seat.

[0014] A guide ring is arranged inside the sealing seat, and the guide ring is sleeved on the outer side of the transmission rod.

[0015] A static contact seat and a dynamic contact seat are also provided in the housing;

[0016] The static contact seat is connected to the static contact of the arc extinguishing chamber;

[0017] The moving contact seat is connected to the moving contact of the arc extinguishing chamber.

[0018] A support base is also provided on the shell, and a support base plate is provided at the lower end of the support base.

[0019] The end cover plate is provided with a density relay and a bursting disc.

[0020] It also includes a sealed shell, wherein the operating mechanism is arranged inside the sealed shell;

[0021] The straight-through cylinder is connected to the sealed shell.

[0022] The straight-through cylinder is rigidly connected to the sealed shell.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The utility model discloses a GIS direct-acting circuit breaker, in which an operating mechanism is arranged on the outside of a shell, saving the internal space of the shell, and the connection between the operating mechanism and the arc extinguishing chamber is achieved through a transmission rod. This structural design can make the circuit breaker smaller in size, reduce the floor space, and reduce the failure rate of three-phase non-synchronous operation. The length of the straight-through cylinder can be determined according to the actual stroke requirements, so that the volume of the circuit breaker is more flexible, which is beneficial to production and transportation, and reduces the installation space requirement of the circuit breaker.

[0025] Furthermore, in the present invention, an annular groove is provided at the connecting end of the straight-through cylinder and the flat cover plate, and a sealing ring is provided in the annular groove to achieve a sealed connection between the straight-through cylinder and the flat cover plate, thereby ensuring that the gas in the circuit breaker will not leak from the flat cover plate, thereby improving the air tightness of the circuit breaker.

[0026] Furthermore, in the present invention, the density relay and bursting disc provided can monitor the pressure of the gas chamber, and prevent overpressure explosion, fire, and gas leakage that may cause toxic gas poisoning. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is the overall structural diagram of the utility model;

[0029] Figure 2 This is the installation diagram of the sealing seat structure of the utility model;

[0030] Figure 3 This is a schematic diagram of the insulating pull rod of the arc extinguishing chamber of the present utility model.

[0031] Among them: 1-end cover; 2-arc extinguishing chamber; 3-static contact seat; 4-moving contact seat; 5-flat cover; 6-transmission rod; 7-operating mechanism; 8-support base plate; 9-density relay; 10-bursting disc; 11-support seat; 12-sealing seat; 13-straight-through cylinder; 14-sealed shell. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0035] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear to indicate an orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the product of the present invention is typically placed when in use. These terms are used solely to facilitate the description of the present invention and to simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. 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 internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] The present invention is described in further detail below with reference to the accompanying drawings:

[0039] See also Figure 1-Figure 3 The embodiment of the utility model discloses a GIS direct-acting circuit breaker, a GIS direct-acting circuit breaker, comprising a shell, an operating mechanism 7 is provided at one end of the shell, an arc extinguishing chamber 2 is provided inside the shell, and a straight-through cylinder 13 is provided between the shell and the operating mechanism 7; and further comprising a transmission rod 6, the transmission rod 6 passing through the straight-through cylinder 13, one end of the transmission rod 6 extending into the shell and connected to the arc extinguishing chamber 2, and the other end connected to the driving end of the operating mechanism 7.

[0040] Furthermore, in the embodiment of the present invention, a flat cover plate 5 is provided at one end of the shell, and an end cover plate 1 is provided at the other end, and the flat cover plate 5 and the end cover plate 1 are fixedly connected by bolts.

[0041] Furthermore, in the embodiment of the present invention, the operating mechanism 7 is arranged inside the sealed shell 14, one end of the straight-through cylinder 13 is connected to the flat cover plate 5, and the other end is connected to the sealed shell 14, and one end of the transmission rod 6 passes through the flat cover plate 5, and the other end passes through the sealed shell 14.

[0042] Specifically, a through hole is formed in the flat cover plate 5, through which a transmission rod 6 extends. The transmission rod 6 is a double-ended screw that passes through the center of the straight barrel 13. One end of the transmission rod 6 extends through the flat cover plate 5 into the arc extinguishing chamber 2 and is fixedly connected to the insulating rod inside the arc extinguishing chamber 2. The other end of the transmission rod 6 passes through the straight barrel 13 and the sealed housing 14 and is fixedly connected to the rotating block of the operating mechanism 7. The operating mechanism 7 drives the rotating block, which drives the insulating rod through the transmission rod 6 to realize the opening and closing of the moving contact and the static contact.

[0043] Furthermore, in the embodiment of the present invention, the length of the insulating rod of the arc extinguishing chamber 2 is shortened from the original 596mm to 575mm, and the connecting end with the transmission rod 6 is modified from aluminum alloy to 45# steel with the size of: diameter 30mm,

[0044] Furthermore, in an embodiment of the present invention, the end of the through-cylinder 13 is fixed to the outside of the through hole, and an annular groove is provided at the connecting end of the through-cylinder 13 and the flat cover plate 5. A sealing ring is provided in the annular groove, and the through-cylinder 13 is fastened to the flat cover plate 5 with bolts. The sealing ring is squeezed to achieve a sealed connection between the through-cylinder 13 and the flat cover plate 5, so that the gas in the circuit breaker will not leak from the flat cover plate 5, thereby ensuring the airtightness of the circuit breaker.

[0045] Furthermore, in the embodiment of the present invention, a sealing seat 12 is provided in the through hole of the flat cover plate 5, and avoidance holes corresponding to the transmission rod 6 are opened at both ends of the sealing seat 12. The transmission rod 6 passes through the sealing seat 12, and a guide ring is provided inside the sealing seat 12. The guide ring is sleeved on the outside of the transmission rod 6.

[0046] Furthermore, in the embodiment of the present invention, a static contact seat 3 and a moving contact seat 4 are also provided in the shell. The static contact seat 3 is connected to the static contact of the arc extinguishing chamber 2, and the moving contact seat 4 is connected to the moving contact of the arc extinguishing chamber 2. The contact seat 3 and the moving contact seat 4 can be symmetrically distributed up and down along the arc extinguishing chamber 2. There is no need to distinguish between the upper and lower parts during assembly, which improves the flexibility and diversity of assembly and meets the use requirements of different circuit breaker installation structures.

[0047] Furthermore, in an embodiment of the present invention, a support seat 11 is also provided on the shell, and a support base plate 8 is provided at the lower end of the support seat 11. Specifically, the support seat 11 includes a moving end support seat and a static end support seat, which are distributed at intervals along the axial direction of the shell. The support seat 11 and the support base plate 8 cooperate to stabilize the circuit breaker.

[0048] Furthermore, in the embodiment of the present invention, the end cover plate 1 is a cover structure with a concave cavity, and a density relay 9 and a bursting disc 10 are installed on the outside of the end cover plate 1, which can monitor the gas chamber pressure, prevent overpressure explosion, prevent fire, and prevent gas leakage from causing toxic gas poisoning.

[0049] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A GIS direct-acting circuit breaker, characterized in that: It comprises a shell, an operating mechanism (7) is provided at one end of the shell, an arc extinguishing chamber (2) is provided inside the shell, and a straight-through cylinder (13) is provided between the shell and the operating mechanism (7); It also includes a transmission rod (6), which passes through the straight-through cylinder (13), one end of the transmission rod (6) extends into the shell and is connected to the arc extinguishing chamber (2), and the other end is connected to the driving end of the operating mechanism (7).

2. The GIS direct-acting circuit breaker according to claim 1, characterized in that: A flat cover plate (5) is provided at the connection end between the shell and the straight-through cylinder (13), and an end cover plate (1) is provided at the other end of the shell; A through hole is provided on the flat cover plate (5), and the transmission rod (6) passes through the through hole on the flat cover plate (5).

3. The GIS direct-acting circuit breaker according to claim 2, characterized in that: An annular groove is provided at the connection end between the straight-through cylinder (13) and the flat cover plate (5), and a sealing ring is provided in the annular groove.

4. The GIS direct-acting circuit breaker according to claim 3, characterized in that: A sealing seat (12) is provided in the through hole, and the transmission rod (6) passes through the sealing seat (12).

5. The GIS direct-acting circuit breaker according to claim 4, characterized in that: A guide ring is provided inside the sealing seat (12), and the guide ring is sleeved on the outside of the transmission rod (6).

6. The GIS direct-acting circuit breaker according to claim 1, characterized in that: A static contact seat (3) and a dynamic contact seat (4) are also provided in the housing; The static contact seat (3) is connected to the static contact of the arc extinguishing chamber (2); The moving contact seat (4) is connected to the moving contact of the arc extinguishing chamber (2).

7. The GIS direct-acting circuit breaker according to claim 1, characterized in that: A support seat (11) is also provided on the shell, and a support base plate (8) is provided at the lower end of the support seat (11).

8. The GIS direct-acting circuit breaker according to claim 2, characterized in that: The end cover plate (1) is provided with a density relay (9) and a bursting disc (10).

9. The GIS direct-acting circuit breaker according to claim 1, characterized in that: It also includes a sealed housing (14), wherein the operating mechanism (7) is arranged inside the sealed housing (14); The straight-through cylinder (13) is connected to the sealed shell (14).

10. The GIS direct-acting circuit breaker according to claim 9, characterized in that: The straight-through cylinder (13) is rigidly connected to the sealed shell (14).

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