CN211183104U - C with quick separating brake function4F7N-CO2Gas insulation ring main unit - Google Patents

Abstract

This utility model provides a _C4F7N - _CO2 gas-insulated ring main unit with a fast tripping function. The gas-insulated ring main unit includes a circuit breaker and _an isolating-grounding switch. Each phase arc-extinguishing chamber of the circuit breaker is individually equipped with a monostable permanent magnet operating mechanism, and the transmission rod of the monostable permanent magnet operating mechanism is vertically connected to each phase arc-extinguishing chamber of the circuit breaker. The circuit breaker, isolating-grounding switch, and monostable permanent magnet operating mechanism are all sealed within _the gas-insulated ring main unit's enclosure. The enclosure of the gas-insulated ring main unit is filled with an environmentally friendly gas composed of a mixture of _C4F7N and _CO2 . Its advantages are: the enclosure of the gas-insulated ring main unit of this utility model is filled with an environmentally friendly gas composed of a mixture of _C4F7N and _CO2 , which has high electrical performance and effectively avoids the greenhouse effect and ozone depletion effect caused by existing _SF6 gas _- filled switchgear.

Description

A C4F7N-CO2 gas-insulated ring network cabinet with quick opening function

technical field

The utility model relates to a gas-insulated ring network cabinet, in particular to a C ₄ F ₇ N-CO ₂ gas-insulated ring network cabinet with a quick opening function.

Background technique

Sulfur hexafluoride (SF ₆ ) has excellent insulating and arc extinguishing properties, and is widely used in gas-insulated electrical equipment. SF ₆ is an insulating medium with highly stable chemical properties and high greenhouse effect. The greenhouse effect potential value (GWP) of SF ₆ is 23,500 times that of CO ₂ , and its survival life in the atmosphere is 3,200 years. So far, the content of SF ₆ gas in the atmosphere has grown at an annual rate of 8.7%, and the gas has accounted for more than 15% of the total greenhouse gas emissions. The use of SF ₆ gas in the power industry accounts for a major part of the global total use of SF ₆ gas, and its emissions also account for the largest proportion of the total global SF ₆ gas emissions. In 1997, the "Kyoto Protocol" has clearly listed SF ₆ gas as one of the six kinds of gases that are restricted in the world, and requires developed countries to first freeze the emissions of greenhouse gases at the level of the 1990s, requiring basic restrictions by 2020. Use of _SF6 gas. In order to reduce or even eliminate the use of SF ₆ gas, SF ₆ gas replacement technology has become one of the research hotspots of domestic and foreign experts and scholars in recent years.

Therefore, it is necessary to develop a gas-insulated ring main unit that does not contain SF ₆ .

Utility model content

The purpose of this utility model is to provide a C ₄ F ₇ N-CO ₂ gas-insulated ring network cabinet with fast opening function, and its technical scheme is:

The gas-insulated ring main unit includes a circuit breaker and an isolation-earthing switch, and each phase arc extinguishing chamber of the circuit breaker is individually equipped with a monostable permanent magnet operating mechanism, and the monostable permanent magnet operating mechanism The transmission rod of the circuit breaker is connected vertically with the arc extinguishing chamber of each phase of the circuit breaker; the circuit breaker, the isolation-earth switch and the monostable permanent magnet operating mechanism are all sealed in the box of the gas-insulated ring main unit; the gas-insulated ring The cabinet of the network cabinet is filled with an environmental protection gas composed of a mixture of C ₄ F ₇ N and CO ₂ .

The utility model provides a C ₄ F ₇ N-CO ₂ gas-insulated ring network cabinet with a quick opening function, which also includes the following subsidiary technical solutions:

Wherein, the pressure of the environmental protection gas composed of the mixed gas of C ₄ F ₇ N and CO ₂ filled in the box of the gas-insulated ring main unit is 0.1M-0.16Pa, and the volume fraction of the C ₄ F ₇ N is 18%-26%.

Wherein, the operating mechanism of the isolation-earth switch and the manual branch mechanism of the circuit breaker are both arranged outside the box of the gas-insulated ring main unit.

Wherein, the two inner side walls of the box body of the gas-insulated ring main unit are provided with connectors for realizing the expansion function of side connection.

Wherein, the box body of the gas-insulated ring network cabinet is also provided with a gas density meter and an explosion-proof pressure relief device.

Wherein, the isolation-grounding switch is a three-position isolation switch.

Wherein, shaft seal components are arranged between the isolation-earth switch and the box of the gas-insulated ring main unit, and between the circuit breaker and the box of the gas-insulated ring main unit.

Wherein, the circuit breaker adopts vacuum arc extinguishing.

The implementation of the present utility model includes the following technical effects:

The utility model provides a C ₄ F ₇ N-CO ₂ gas-insulated ring network cabinet with fast opening function, which has electric and manual opening and closing functions, and has a grounding closing function at the same time; and the utility model provides In the C ₄ F ₇ N-CO ₂ gas-insulated ring network cabinet, each phase arc extinguishing chamber of the three-phase permanent magnet circuit breaker is individually equipped with a monostable permanent magnet operating mechanism inside the box, and makes The transmission rod of each monostable permanent magnet operating mechanism is vertically connected to the arc extinguishing chamber of each phase. During the closing and opening operation, the permanent magnet driver synchronously energizes the three-phase monostable permanent magnet operating mechanism. Each of the three monostable permanent magnet operating mechanisms drives one-phase arc extinguishing chamber to complete the closing and opening actions. Because each phase monostable permanent magnet operating mechanism is directly connected to the arc extinguishing chamber by direct action, it is connected with the conventional circuit breaker. Compared with the conventional crank arm and four-link transmission mode, the transmission structure of this connection mode is simpler. The operating force of the monostable permanent magnet operating mechanism for closing and opening directly acts on the arc extinguishing chamber, and the energy loss during the transmission process is low, high transmission efficiency.

Therefore, in a C ₄ F ₇ N-CO ₂ gas-insulated ring network cabinet provided by the present invention, a monostable permanent The magnetic operating mechanism is designed to perform closing and opening, so that the circuit breaker can meet the inherent opening time of the circuit breaker ≤ 5ms and the opening time ≤ 15ms when performing the opening and closing operation, which cannot be achieved by conventional circuit breaker products. Further, the utility model provides a C ₄ F ₇ N-CO ₂ gas-insulated ring network cabinet with fast opening function, which occupies a small area, has a high protection level, is suitable for operation in areas such as high altitudes, and is easy to maintain and maintain. Install.

Moreover, the box body of the gas-insulated ring network cabinet of the present invention is filled with an environmental protection gas composed of a mixed gas of C ₄ F ₇ N and CO ₂ , which has high electrical performance and can effectively avoid the existing SF ₆ gas inflated The greenhouse effect and no ozone depletion effect brought by the cabinet.

Description of drawings

FIG. 1 is a schematic structural diagram of a C ₄ F ₇ N-CO ₂ gas-insulated ring network cabinet with a fast opening function of the present invention.

In the figure, 1-circuit breaker, 2-isolation-earthing switch, 3-monostable permanent magnet operating mechanism, 4-gas-insulated ring main unit box, 11-hand branch mechanism, 21-operating mechanism.

Detailed ways

The present utility model will be described in detail below with reference to the embodiments and the accompanying drawings. It should be noted that the described embodiments are only intended to facilitate the understanding of the present utility model, but do not have any limiting effect on it.

The orientations described in this application, such as up and down, left and right, are used for convenience of description with reference to the accompanying drawings, and do not constitute a limitation on the protection scope.

The utility model provides a C ₄ F ₇ N-CO ₂ gas-insulated ring network cabinet with fast opening function. As shown in FIG. 1 , the gas-insulated ring network cabinet includes a circuit breaker 1 and an isolation-grounding switch 2 , each phase arc extinguishing chamber of the circuit breaker 1 is separately configured with a monostable permanent magnet operating mechanism 3, and the transmission rod of the monostable permanent magnet operating mechanism is connected with each phase arc extinguishing chamber of the circuit breaker. The circuit breaker 1, the isolation-earthing switch 2 and the monostable permanent magnet operating mechanism 3 are all sealed in the box body 4 of the gas-insulated ring network cabinet, and the box body 4 of the gas-insulated ring network cabinet The inside is filled with mixed gas composed of C ₄ F ₇ N and CO ₂ ; the circuit breaker adopts vacuum arc extinguishing; wherein, the isolation-earth switch is a three-position isolation switch.

Conventional circuit breakers generally have an external permanent magnet operating mechanism, and the permanent magnet operating mechanism is connected to the transmission main shaft through a shaft seal. The transmission main shaft is connected with the A/B/C three-phase arc extinguishing chamber through the arm, connecting rod, etc. When the operation is closed and opened, the permanent magnet operating mechanism is energized to drive the transmission main shaft to rotate, thereby driving the A/B/C three-phase extinguishing chamber. The arc chambers work together to complete the closing and opening actions.

The utility model provides a C ₄ F ₇ N-CO ₂ gas-insulated ring network cabinet with fast opening function, which has electric and manual opening and closing functions, and has a grounding closing function at the same time; and the utility model provides In the C ₄ F ₇ N-CO ₂ gas-insulated ring network cabinet, each phase arc extinguishing chamber of the three-phase permanent magnet circuit breaker is individually equipped with a monostable permanent magnet operating mechanism inside the box, and makes The transmission rod of each monostable permanent magnet operating mechanism is vertically connected to the arc extinguishing chamber of each phase. During the closing and opening operation, the permanent magnet driver synchronously energizes the three-phase monostable permanent magnet operating mechanism. Each of the three monostable permanent magnet operating mechanisms drives one-phase arc extinguishing chamber to complete the closing and opening action. Since each phase monostable permanent magnet operating mechanism is directly connected to the arc extinguishing chamber by direct action, it is connected with the conventional circuit breaker. Compared with the conventional crank arm and four-link transmission mode, the transmission structure of this connection mode is simpler. The operating force of the monostable permanent magnet operating mechanism for closing and opening directly acts on the arc extinguishing chamber, and the energy loss during the transmission process is low, high transmission efficiency.

Therefore, in the C ₄ F ₇ N-CO ₂ gas-insulated ring main unit provided by this embodiment, a monostable permanent magnet operation is separately configured in each phase arc extinguishing chamber of the three-phase direct-acting permanent magnet circuit breaker. The design method of closing and opening by the actuating mechanism enables the circuit breaker to satisfy the inherent opening time of the circuit breaker ≤ 5ms and the opening time ≤ 15ms when performing the opening and closing operation, which cannot be achieved by conventional circuit breaker products. Further, the utility model provides a C ₄ F ₇ N-CO ₂ gas-insulated ring network cabinet with quick opening function, which has a small footprint, high protection level, is suitable for operation in areas such as high altitudes, and is easy to maintain. and install.

Moreover, the box body of the gas-insulated ring network cabinet of the present invention is filled with an environmental protection gas composed of a mixed gas of C ₄ F ₇ N and CO ₂ , which has high electrical performance and can effectively avoid the existing SF ₆ gas inflated The greenhouse effect and no ozone depletion effect brought by the cabinet.

Preferably, the pressure of the environmental protection gas composed of the mixed gas of C ₄ F ₇ N and CO ₂ in the box of the gas-insulated ring main unit is 0.10-0.16MPa, and the volume fraction of the C ₄ F ₇ N is 18%- 26%. More preferably, the pressure of the environmental protection gas composed of the mixed gas of C ₄ F ₇ N and CO ₂ in the box of the gas-insulated ring main unit is 0.13 MPa, and the volume fraction of the C ₄ F ₇ N is 22%.

Wherein, the box body of the gas-insulated ring network cabinet is made of stainless steel.

Preferably, as shown in FIG. 1 , both the operating mechanism 21 of the isolating-earthing switch 2 and the manual branching mechanism 11 of the circuit breaker 1 are arranged outside the box body 4 of the gas-insulated ring main unit.

Preferably, the two inner side walls of the box body 4 of the gas-insulated ring main unit are provided with connectors for realizing the expansion function of side connection.

Preferably, the box body 4 of the gas-insulated ring network cabinet is further provided with a gas density meter and an explosion-proof pressure relief device.

Preferably, a shaft seal assembly is provided between the isolation-grounding switch 2 and the box body 4 of the gas-insulated ring main unit, and between the circuit breaker 1 and the box body 4 of the gas-insulated ring main unit, The shaft seal assembly is used to connect the isolation-earth switch 2 and the box 4 of the gas-insulated ring main unit, and the shaft seal assembly is used to connect the circuit breaker 1 and the gas-insulated ring main unit the box 4.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the present invention. Persons should understand that the technical solutions of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims (7)

1. C with quick separating brake function₄F₇N-CO₂The gas insulation ring main unit is characterized by comprising a circuit breaker and an isolation-grounding switch, wherein each phase of arc extinguish chamber of the circuit breaker is independently provided with a monostable permanent magnet operating mechanism, and a transmission rod of the monostable permanent magnet operating mechanism is vertically connected with each phase of arc extinguish chamber of the circuit breaker; the circuit breaker, the isolation-grounding switch and the monostable permanent magnet operating mechanism are all sealed in a box body of the gas insulation ring main unit; the box body of the gas insulation ring main unit is filled with a material C₄F₇N and CO₂The mixed gas of (1) to form an environment-friendly gas;

the box body of the gas insulation ring main unit is filled with C₄F₇N and CO₂The pressure of the environment-friendly gas consisting of the mixed gas is 0.1M-0.16 Pa.

2. C with quick opening function according to claim 1₄F₇N-CO₂Gas insulation looped netowrk cabinet, its characterized in that: the operating mechanism of the isolation-grounding switch and the manual separation mechanism of the circuit breaker are both arranged outside the box body of the gas insulation ring main unit.

3. C with quick opening function according to claim 1₄F₇N-CO₂Gas insulation looped netowrk cabinet, its characterized in that: and connectors for realizing side connection and expansion functions are arranged on two inner side walls of the box body of the gas insulation ring main unit.

4. C with quick opening function according to claim 1₄F₇N-CO₂Gas insulated ring networkCabinet, its characterized in that: and a gas density meter and an explosion-proof pressure relief device are also arranged on the box body of the gas insulation ring main unit.

5. C with quick opening function according to claim 1₄F₇N-CO₂Gas insulation looped netowrk cabinet, its characterized in that: the isolation-grounding switch is a three-position isolation switch.

6. C with quick opening function according to claim 1₄F₇N-CO₂Gas insulation looped netowrk cabinet, its characterized in that: shaft seal assemblies are arranged between the isolation-grounding switch and the box body of the gas insulation ring main unit and between the circuit breaker and the box body of the gas insulation ring main unit.

7. C with quick opening function according to claim 1₄F₇N-CO₂Gas insulation looped netowrk cabinet, its characterized in that: the circuit breaker adopts vacuum arc extinction.

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