SF6 automatic gas supplementing device

Abstract

The invention relates to the field of gas conveying, and discloses an SF6 automatic gas supplementing device, which comprises a gas supply piece, the gas supply piece comprises a pressure reducing valve, a hose and a check valve, the output end of the pressure reducing valve is communicated with the input end of the hose, and the output end of the hose is communicated with the input end of the check valve; the automatic pressure regulating control piece is communicated with the air supply piece; the pressure reducing valve is communicated with the gas supply bottle, and the check valve is communicated with gas supply equipment, so that vaporization and conveying of liquid SF6 are realized; due to the automatic adjusting function of the automatic pressure adjusting control piece, the risk of manual pressure adjusting is avoided, the air supply pressure can be flexibly set according to the rated pressure of different air supplied equipment, and the air supply process is more intelligent and controllable; meanwhile, the position of the automatic pressure regulating control part is specially limited, so that accurate regulation and control of the air supply pressure are further ensured, pressure fluctuation is reduced, the stability and reliability of the air supply process are improved, and the requirement of equipment for accurate air supply is met.

Description

Technical Field

[0001] This invention relates to the field of gas transportation, and in particular to an automatic SF6 gas replenishment device. Background Technology

[0002] Sulfur hexafluoride (SF6) is a gas widely used in electrical equipment, renowned for its excellent electrical insulation and arc-extinguishing capabilities. However, SF6 electrical equipment in substations may leak due to design flaws or aging, leading to a decrease in SF6 pressure within the equipment. Although SF6 itself is stable and non-toxic, it can produce toxic gases when breaking loads in circuit breakers, posing a threat to the environment and human health. When the pressure of an SF6 circuit breaker drops below the alarm threshold, it triggers a density relay, preventing the circuit breaker from opening and closing properly and significantly reducing its insulation and arc-extinguishing performance. If not addressed promptly, this can lead to serious power outages. Therefore, pressure monitoring and timely replenishment of SF6 in electrical equipment are crucial.

[0003] Existing SF6 gas replenishment devices have significant drawbacks, primarily including the manual adjustment of the pressure reducing valve during the replenishment process. This is not only inefficient but can also lead to improper replenishment pressure. Insufficient pressure prolongs replenishment time and reduces efficiency, while excessive pressure can cause a rapid temperature drop due to rapid gas decompression, leading to ice blockage and, in extreme cases, even a gas chamber explosion. Furthermore, excessively rapid replenishment may exceed the required pressure, increasing safety risks. To address these shortcomings, this invention aims to provide an SF6 gas replenishment system that can automatically adjust the replenishment pressure, improve replenishment efficiency, and ensure safety. Summary of the Invention

[0004] Therefore, the technical problem to be solved by this invention is that existing SF6 gas replenishment devices suffer from low replenishment efficiency and inaccurate replenishment pressure control due to manual adjustment of the pressure reducing valve during operation. This not only increases replenishment time and reduces work efficiency, but also poses safety risks such as icing and blockage of the replenishment pipe or gas chamber explosion due to improper pressure control, thus posing a potential threat to the environment and human health.

[0005] The above-mentioned technical problems are solved by the following technical solution: This invention proposes an automatic SF6 gas replenishment device, which includes,

[0006] The gas supply unit includes a pressure reducing valve, a hose, and a check valve. The output end of the pressure reducing valve is connected to the input end of the hose, and the output end of the hose is connected to the input end of the check valve. By connecting the input end of the pressure reducing valve to the gas supply cylinder and then connecting the output end of the check valve to the gas-supplying device, the liquid SF6 inside the gas supply cylinder can be converted into gas by opening the pressure reducing valve, and then introduced into the gas-supplying device through the hose and the pressure reducing valve.

[0007] An automatic pressure regulating controller is connected to the gas supply component. The controller automatically controls the input pressure in real time based on a set pressure value. During gas replenishment, a pre-replenishment pressure value is input into the controller, and the "Start Replenishment" button is clicked. The controller then automatically controls the pressure reducing valve to begin replenishment, with the replenishment pressure adjusting in real time according to the current SF6 pressure value + 0.02 MPa. By automatically adjusting the SF6 replenishment pressure, the risks of excessive or insufficient pressure adjustment by manual adjustment are avoided. Furthermore, the pre-replenishment pressure can be adjusted according to the different rated pressure values ​​of different SF6 electrical equipment, making the replenishment process more intelligent and controllable.

[0008] In a preferred embodiment of the SF6 automatic gas replenishment device of the present invention: the automatic pressure regulating control component is installed upstream of the gas supply component and before the input end of the hose; by installing the automatic pressure regulating control component upstream of the gas supply component and before the input end of the hose, it can be ensured that the gas pressure entering the hose has been precisely regulated, thereby effectively reducing the impact of hose flexibility or pressure fluctuations during transmission on the gas replenishment effect, and improving the stability and reliability of the gas replenishment process.

[0009] In a preferred embodiment of the SF6 automatic gas replenishment device of the present invention: the automatic pressure regulating control component is installed between the output end of the pressure reducing valve and the input end of the hose; by installing the automatic pressure regulating control component between the output end of the pressure reducing valve and the input end of the hose, the gas after initial vaporization and pressure reduction by the pressure reducing valve can be further precisely regulated, ensuring that the gas pressure entering the hose is more stable and accurate. This design effectively avoids the influence of small fluctuations in the output pressure of the pressure reducing valve on the gas replenishment effect, thereby significantly improving the stability and reliability of the gas replenishment process and better meeting the precise requirements of different equipment for gas replenishment pressure.

[0010] In a preferred embodiment of the SF6 automatic gas replenishment device of the present invention, a three-way connector is further included. This three-way connector connects the output end of the pressure reducing valve, the input end of the hose, and the automatic pressure regulating control component. The output end of the pressure reducing valve and the input end of the hose are arranged at the same horizontal plane. The use of the three-way connector makes the entire connection more compact and reliable, reducing the risk of pressure loss or leakage due to improper connection. Furthermore, the arrangement at the same horizontal plane avoids additional pressure changes caused by height differences, further improving the accuracy and reliability of the gas replenishment system and providing the equipment with a more stable and precise gas replenishment pressure.

[0011] In a preferred embodiment of the SF6 automatic gas replenishment device of the present invention: the input end of the pressure reducing valve is a power input connector, which is connected to the gas cylinder; the output end of the pressure reducing valve is a power output connector, which is connected to the tee connector to realize the device connection.

[0012] In a preferred embodiment of the SF6 automatic gas replenishment device of the present invention: the output end of the check valve is a gas input connector, which is connected to the output end of the hose; the output end of the check valve is a gas output connector, which is connected to the gas-supplying equipment.

[0013] In a preferred embodiment of the SF6 automatic gas replenishment device of the present invention: the gas output connector and the check valve are detachably connected, and the gas output connector can be replaced with a suitable one according to the gas-supplying equipment; the operator can replace the appropriate gas output connector according to different gas-supplying equipment to ensure that the device can be connected to various gas-supplying equipment, thereby improving the compatibility and application range of the device. At the same time, the detachable connection design also facilitates maintenance and replacement, reduces the operating cost, and significantly improves the versatility and flexibility of the device.

[0014] In a preferred embodiment of the SF6 automatic gas replenishment device of the present invention: the automatic pressure regulating control component adopts an intelligent pressure switch or an intelligent pressure controller or a device that can automatically control the input pressure in real time according to the set pressure value.

[0015] The beneficial effects of this invention are as follows: by connecting the pressure reducing valve to the gas supply cylinder and the check valve to the gas-supplying equipment, the vaporization and transportation of liquid SF6 are achieved. The automatic adjustment function of the automatic pressure regulating control not only avoids the risks of manual pressure adjustment but also allows for flexible setting of the replenishment pressure according to the rated pressure of different gas-supplying equipment, making the replenishment process more intelligent and controllable. Simultaneously, by specifically defining the position of the automatic pressure regulating control, precise control of the replenishment pressure is further ensured, reducing pressure fluctuations and improving the stability and reliability of the replenishment process, thus meeting the equipment's requirements for precise replenishment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0017] Figure 1 A schematic diagram of the overall structure of the present invention is shown.

[0018] Figure 2 A schematic diagram of the check valve structure of the present invention is shown.

[0019] Figure 3 A schematic diagram of the three-way connector structure of the present invention is shown. Detailed Implementation

[0020] 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 specific embodiments and accompanying drawings.

[0021] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0022] Reference Figures 1-3 This embodiment provides an automatic SF6 gas replenishment device, including,

[0023] Gas supply component 1 includes a pressure reducing valve 11, a hose 12, and a check valve 13. The output end of the pressure reducing valve 11 is connected to the input end of the hose 12, and the output end of the hose 12 is connected to the input end of the check valve 13. By connecting the input end of the pressure reducing valve 11 to the gas supply cylinder and then connecting the output end of the check valve 13 to the gas-supplying equipment, the liquid SF6 inside the gas supply cylinder can be converted into gas by opening the pressure reducing valve 11, and then introduced into the gas-supplying equipment through the hose 12 and the pressure reducing valve 11.

[0024] The automatic pressure regulating control unit 2 is connected to the gas supply unit 1. Based on the set pressure value, the automatic pressure regulating control unit 2 automatically controls the input pressure in real time. When replenishing SF6, the pre-replenishment pressure value is input into the automatic pressure regulating control unit 2, and the "Start Replenishment" button is clicked. The automatic pressure regulating control unit 2 then automatically controls the pressure reducing valve 11 to begin replenishment. The replenishment pressure is adjusted in real time according to the current SF6 pressure value + 0.02 MPa. By automatically adjusting the SF6 replenishment pressure, the risks of excessive or insufficient pressure adjustment by manual adjustment are avoided. Furthermore, the pre-replenishment pressure can be adjusted according to the different rated pressure values ​​of different SF6 electrical equipment, making the replenishment process more intelligent and controllable.

[0025] It also includes a tee connector 3, which connects the output end of the pressure reducing valve 11, the input end of the hose 12, and the automatic pressure regulating control component 2. The output end of the pressure reducing valve 11 and the input end of the hose 12 are set at the same horizontal plane. The use of the tee connector 3 makes the entire connection more compact and reliable, reducing the risk of pressure loss or leakage due to improper connection. The setting at the same horizontal plane avoids additional pressure changes caused by height differences, further improving the accuracy and reliability of the air replenishment system and providing the equipment with a more stable and accurate air replenishment pressure.

[0026] The input end of the pressure reducing valve 11 is the power input connector 111, which is connected to the gas cylinder; the output end of the pressure reducing valve 11 is the power output connector 112, which is connected to the tee connector 3 to connect the equipment.

[0027] The output end of the check valve 13 is a gas input connector 131, which is connected to the output end of the hose 12; the output end of the check valve 13 is a gas output connector 132, which is connected to the gas-supplying equipment.

[0028] The automatic pressure regulating control component 2 adopts an intelligent pressure switch or intelligent pressure controller, or is a device that can automatically control the input pressure in real time according to the set pressure value.

[0029] By connecting the input end of the pressure reducing valve 11 to the gas supply cylinder and the output end of the check valve 13 to the equipment being supplied with gas, the liquid SF6 in the gas supply cylinder can be converted into gas after the pressure reducing valve 11 is opened. This gas is then delivered to the equipment being supplied with gas via the pressure reducing valve 11 and the hose 12. During gas replenishment, the pre-replenishment pressure value is input into the automatic pressure regulating control unit 2, and gas replenishment is initiated. The unit can automatically adjust the replenishment pressure to follow the current SF6 pressure value +0.02MPa in real time. This automatic adjustment method not only avoids the risks of excessive or insufficient pressure adjustment that may occur with manual adjustment, but also allows for flexible setting of the pre-replenishment pressure according to the rated pressure values ​​of different SF6 electrical equipment, making the gas replenishment process more intelligent and controllable.

[0030] Furthermore, the output end of the pressure reducing valve 11, the input end of the hose 12, and the automatic pressure regulating control component 2 are connected via a three-way connector 3, ensuring that the pressure reducing valve 11 and the hose 12 are on the same horizontal plane. This design makes the entire connection more compact and reliable, reducing the risk of pressure loss or leakage due to improper connection. At the same time, the horizontal plane setting avoids additional pressure changes caused by height differences, further improving the accuracy and stability of the air replenishment system and providing the equipment with a more stable and precise air replenishment pressure.

[0031] As one embodiment provided, such as Figure 1The automatic pressure regulating control unit 2 is installed upstream of the gas supply unit 1 and before the input end of the hose 12. By installing the automatic pressure regulating control unit 2 upstream of the gas supply unit 1 and before the input end of the hose 12, it can be ensured that the gas pressure entering the hose 12 has been precisely regulated, thereby effectively reducing the impact of pressure fluctuations during transmission caused by the flexibility of the hose 12 bending and shaking on the gas replenishment effect, and improving the stability and reliability of the gas replenishment process.

[0032] An automatic pressure regulating control component 2 is installed between the output end of the pressure reducing valve 11 and the input end of the hose 12. By installing the automatic pressure regulating control component 2 between the output end of the pressure reducing valve 11 and the input end of the hose 12, the gas after initial vaporization and pressure reduction by the pressure reducing valve 11 can be further precisely regulated, ensuring that the gas pressure entering the hose 12 is more stable and accurate. This design effectively avoids the impact of small fluctuations in the output pressure of the pressure reducing valve 11 on the gas replenishment effect, thereby significantly improving the stability and reliability of the gas replenishment process and better meeting the precise requirements of different equipment for gas replenishment pressure.

[0033] By specifically positioning the automatic pressure regulating control component 2 upstream of the gas supply component 1 and between the output end of the pressure reducing valve 11 and the input end of the hose 12, precise control of the gas replenishment process can be achieved. On one hand, this positioning ensures that the gas, after initial vaporization and pressure reduction by the pressure reducing valve 11, undergoes precise re-adjustment by the automatic pressure regulating control component 2 before entering the hose 12. This effectively avoids the impact of minor fluctuations in the output pressure of the pressure reducing valve 11 on the gas replenishment effect, making the gas pressure entering the hose 12 more stable and accurate. On the other hand, it also reduces pressure fluctuations during transmission caused by bending or shaking of the flexible hose 12, further improving the stability and reliability of the gas replenishment process. This design not only enhances the overall performance of the gas replenishment system but also better meets the precise pressure requirements of different equipment, enhancing the intelligence and adaptability of the gas replenishment system.

[0034] As one embodiment provided, such as Figure 3 The gas output connector 132 and the check valve 13 are detachably connected. The appropriate gas output connector 132 can be replaced according to the equipment being supplied with gas. Operators can replace the appropriate gas output connector 132 to ensure that this equipment can be connected to various gas-supplying devices, improving the equipment's compatibility and range of applications. At the same time, the detachable connection design facilitates maintenance and replacement, reduces operating costs, and significantly improves the equipment's versatility and flexibility.

[0035] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. An automatic SF6 gas replenishment device, characterized in that: include, An air supply unit (1) includes a pressure reducing valve (11), a hose (12), and a check valve (13). The output end of the pressure reducing valve (11) is connected to the input end of the hose (12), and the output end of the hose (12) is connected to the input end of the check valve (13). Automatic pressure regulating control component (2) is connected to the air supply component (1). The automatic pressure regulating control component (2) automatically controls the input pressure in real time according to the set pressure value.

2. The SF6 automatic gas replenishment device according to claim 1, characterized in that: The automatic pressure regulating control unit (2) is installed upstream of the air supply unit (1) and before the input end of the hose (12).

3. The SF6 automatic gas replenishment device according to claim 2, characterized in that: The automatic pressure regulating control unit (2) is installed between the output end of the pressure reducing valve (11) and the input end of the hose (12).

4. The SF6 automatic gas replenishment device according to any one of claims 1 to 3, characterized in that: It also includes, A three-way connector (3) is used to connect the output end of the pressure reducing valve (11), the input end of the hose (12), and to install the automatic pressure regulating control component (2). The output end of the pressure reducing valve (11) and the input end of the hose (12) are set at the same horizontal plane.

5. The SF6 automatic gas replenishment device according to claim 4, characterized in that: The input end of the pressure reducing valve (11) is a power input connector (111), which is connected to the gas cylinder; the output end of the pressure reducing valve (11) is a power output connector (112), which is connected to the three-way connector (3) to realize the equipment connection.

6. The SF6 automatic gas replenishment device according to claim 5, characterized in that: The output end of the check valve (13) is a gas input connector (131), which is connected to the output end of the hose (12); the output end of the check valve (13) is a gas output connector (132), which is connected to the gas-supplying equipment.

7. The SF6 automatic gas replenishment device according to claim 6, characterized in that: The gas output connector (132) and the check valve (13) are detachably connected, and the gas output connector (132) can be replaced with a suitable one according to the gas supply equipment.

8. The SF6 automatic gas replenishment device according to any one of claims 5 to 7, characterized in that: The automatic pressure regulating control component (2) adopts an intelligent pressure switch or an intelligent pressure controller or a device that can automatically control the input pressure in real time according to the set pressure value.

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