SF6 gas recovery and release system and device

Abstract

The utility model discloses an SF6 (sulfur hexafluoride) gas recovery and release system and device. The system comprises a PLC (programmable logic controller), a heat dissipation device, gas cylinders, a heating device, a weighing sensor, a pneumatic ball valve and a manual ball valve, wherein the number of the gas cylinders is the same as that of the heat dissipation device. The SF6 gas is introduced into the inlet of the heat dissipation device, the outlet of the heat dissipation device is connected with one end of the second pipeline, and the other end of the second pipeline is connected with the other end of the pneumatic ball valve, so that the SF6 gas flowing into the gas cylinder is cooled, the temperature of the SF6 gas in the gas cylinder can be quickly reduced, and the SF6 gas can be quickly liquefied; the external SF6 gas recovery efficiency of the gas cylinder is improved; meanwhile, the heating device is fixed on the cylinder body of the gas cylinder, and the gas cylinder is heated after receiving the second control signal output by the PLC, so that the SF6 gas in the gas cylinder is quickly vaporized, the SF6 gas is conveniently released to the GIS equipment, and the potential safety hazard caused by vaporization of the SF6 gas in the gas cylinder in a hot water pouring manner is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of SF6 gas recovery and release, in particular to an SF6 gas recovery and release system and device. Background Art

[0002] SF6 gas is usually stored in gas cylinders for transportation and on-site use. Usually, an SF6 gas recovery device is used to recover and refill the SF6 gas into cylinders and directly inflate GIS equipment with the SF6 gas cylinders. During the process of recovering and refilling the external SF6 gas into cylinders, when the gas in the cylinder increases, the pressure will rise and the temperature will also rise accordingly. The SF6 recovery speed becomes slower and the gas is less likely to liquefy, so the refilling volume decreases. Only when the temperature in the cylinder drops to a certain level will the SF6 gas in the cylinder liquefy. This process usually takes several hours and is also closely related to the ambient temperature. The higher the ambient temperature, the less likely the gas is to liquefy, which reduces the on-site work efficiency. At the same time, when inflating GIS equipment with an SF6 gas cylinder, when the gas is released from the cylinder, the SF6 gas needs to absorb a large amount of heat to evaporate and expand. Otherwise, the evaporation becomes slower and the pressure in the cylinder drops rapidly, making it impossible to inflate the GIS equipment. To solve this technical problem, the prior art uses the method of pouring hot water on the gas cylinder to heat up and vaporize the SF6 gas in the cylinder. This method has extremely low heat exchange efficiency and poses a safety hazard. Content of the Utility Model

[0003] Based on this, in view of the above problems, it is necessary to propose an SF6 gas recovery and release system and device.

[0004] An SF6 gas recovery and release system includes:

[0005] A PLC controller, whose output end is connected to the control end of the pneumatic ball valve and the control end of the heating device, is used to output a first control signal to the pneumatic ball valve and a second control signal to the heating device;

[0006] A gas cylinder, whose bottle mouth is connected to one end of the first pipeline. The other end of the first pipeline is connected to one end of the pneumatic ball valve. The other end of the pneumatic ball valve is connected to the GIS equipment. The gas cylinder stores SF6 gas and is used to release SF6 gas to the GIS equipment through the first pipeline and the pneumatic ball valve;

[0007] A manual ball valve, which is arranged on the first pipeline, between the pneumatic ball valve and the gas cylinder, is used to make the first pipeline conduct or cut off;

[0008] The heating device, which is fixed on the bottle body of the gas cylinder, is used to receive the second control signal and heat the gas cylinder;

[0009] The pneumatic ball valve is used to receive the first control signal and is used to connect or cut off the GIS device and the manual ball valve;

[0010] The heat dissipation device has an inlet for accessing SF6 gas, and an outlet connected to one end of the second pipeline. The other end of the second pipeline is connected to the other end of the pneumatic ball valve, and is used to cool the SF6 gas flowing into the gas cylinder;

[0011] The weighing sensor has an output end connected to the PLC controller, and is arranged at the bottom of the gas cylinder, and is used to obtain the weight of the gas cylinder and output the weight to the PLC controller;

[0012] Wherein, the gas cylinder, the heating device, the weighing sensor, the pneumatic ball valve and the manual ball valve are all at least one, and the number of the gas cylinder, the heating device, the weighing sensor, the pneumatic ball valve and the manual ball valve is the same.

[0013] In one embodiment, the SF6 gas recovery and release system further includes:

[0014] The first pressure sensor has an output end connected to the PLC controller, and is arranged at one end of the pneumatic ball valve close to the GIS device, and is used to detect the first pressure of the SF6 gas released to the GIS device through the pneumatic ball valve and output the first pressure to the PLC controller;

[0015] The second pressure sensor has an output end connected to the PLC controller, and is arranged at the inlet of the heat dissipation device, and is used to detect the second pressure of the SF6 gas entering the heat dissipation device and output the second pressure to the PLC controller.

[0016] In one embodiment, the SF6 gas recovery and release system further includes:

[0017] The pneumatic pump has an output end connected to the gas storage tank and is used to supplement gas to the gas storage tank;

[0018] The gas storage tank has an output end connected to a plurality of the pneumatic ball valves and is used to provide compressed air to the plurality of pneumatic ball valves.

[0019] In one embodiment, the SF6 gas recovery and release system further includes:

[0020] The temperature sensor has an output end connected to the PLC controller and is used to detect the temperature data of the environment where a plurality of the gas cylinders are located and output the temperature data to the PLC controller;

[0021] A refrigerator, the control end of which is connected to the PLC controller. The PLC controller is also used to receive the temperature data and output a third control signal to the refrigerator. The refrigerator is used to receive the third control signal and refrigerate the environment where multiple cylinders are located.

[0022] In one embodiment, the SF6 gas recovery and release system further includes:

[0023] An SF6 gas detection sensor, the output end of which is connected to the PLC controller, is used to detect the SF6 gas content in the environment where multiple cylinders are located and output the SF6 gas content to the PLC controller;

[0024] An exhaust fan, the control end of which is connected to the PLC controller. The PLC controller is also used to receive the SF6 gas content and output a fourth control signal to the exhaust fan. The exhaust fan is used to receive the fourth control signal and discharge the SF6 gas existing in the environment where the cylinders are located.

[0025] In one embodiment, the SF6 gas recovery and release system further includes:

[0026] A display screen, the input end of which is connected to the PLC controller, is used to receive the first pressure, the second pressure, the temperature data and the SF6 gas content output by the PLC controller and display the first pressure, the second pressure, the temperature data and the SF6 gas content.

[0027] In one embodiment, the heating device is a coiled copper finned tube.

[0028] An SF6 gas recovery and release device includes: a housing, a heat preservation bin, a first door and a second door oppositely arranged on the heat preservation bin, and the SF6 gas recovery and release system as described above;

[0029] The heat preservation bin is arranged inside the housing. Multiple cylinders, multiple heating devices, multiple weighing sensors, multiple manual ball valves, a heat dissipation device, the refrigerator, the temperature sensor, the SF6 gas detection sensor and the exhaust fan are all arranged inside the heat preservation bin;

[0030] Multiple pneumatic ball valves, the pneumatic pump, the gas storage tank, the first pressure sensor, the second pressure sensor, the PLC controller and the display screen are arranged between the housing and the heat preservation bin.

[0031] In one embodiment, the SF6 gas recovery and release system further includes:

[0032] The first camera, with its output end connected to the display screen, is arranged between the outer shell and the heat preservation bin, and is used to obtain the first space formed between the outer shell and the heat preservation bin, obtain the first video information of the first space, and output the first video information to the display screen;

[0033] The second camera, with its output end connected to the display screen, is arranged inside the heat preservation bin, and is used to obtain the second video information inside the heat preservation bin, and output the second video information to the display screen;

[0034] The third camera, with its output end connected to the display screen, is arranged inside the heat preservation bin and is arranged opposite to the second camera, and is used to obtain the third video information inside the heat preservation bin, and output the third video information to the display screen.

[0035] In one embodiment, the SF6 gas recovery and release system further includes:

[0036] The first position switch, with its output end connected to the PLC controller, is arranged at the first door body, and is used to obtain the first switch state information of the first door body, and output the first switch state information to the PLC controller;

[0037] The second position switch, with its output end connected to the PLC controller, is arranged at the second door body, and is used to obtain the second switch state information of the second door body, and output the second switch state information to the PLC controller.

[0038] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0039] By connecting the inlet of the heat dissipation device to SF6 gas, connecting the outlet of the heat dissipation device to one end of the second pipeline, and connecting the other end of the second pipeline to the other end of the pneumatic ball valve, it is realized to cool the SF6 gas flowing into the gas cylinder, and the temperature of the SF6 gas in the gas cylinder can be reduced quickly, so that the SF6 gas can be liquefied quickly, improving the efficiency of the gas cylinder for recovering external SF6 gas; at the same time, by fixing the heating device on the bottle body of the gas cylinder and heating the gas cylinder after receiving the second control signal output by the PLC controller, the SF6 gas in the gas cylinder is quickly vaporized, which is convenient for releasing SF6 gas to the GIS device, avoiding the safety hazards brought by the method of pouring hot water to vaporize the SF6 gas in the gas cylinder. Description of the Drawings

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0041] Wherein:

[0042] Figure 1 It is a structural block diagram of an SF6 gas recovery and release system in an embodiment. Specific embodiments

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0044] SF6 gas is usually stored in gas cylinders for transportation and on-site use. Usually, an SF6 gas recovery device is used to recover and refill the SF6 gas into bottles and directly fill GIS equipment with the SF6 gas cylinders. During the process of recovering and refilling the external SF6 gas into bottles, when the gas in the cylinder increases, the pressure will rise, and the temperature will also rise accordingly. The SF6 recovery speed becomes slower and the gas is less likely to liquefy, so the filling volume decreases. Only when the temperature in the cylinder drops to a certain extent will the SF6 gas in the cylinder liquefy. This process usually takes several hours and is also closely related to the ambient temperature. The higher the ambient temperature, the less likely it is to liquefy, which reduces the on-site work efficiency. At the same time, when filling GIS equipment with an SF6 gas cylinder, when the gas is released from the cylinder, the SF6 gas needs to absorb a large amount of heat to evaporate and expand. Otherwise, the evaporation will become slower and the pressure in the cylinder will drop rapidly, making it impossible to fill the GIS equipment. To solve the above technical problems, the present application provides an SF6 gas recovery and release system, as Figure 1As shown in the figure, it includes: a PLC controller 30, gas cylinders (A1 - A6) A, a manual ball valve Q, a heating device B, a pneumatic ball valve V, a heat dissipation device T1, and a weighing sensor C. Among them, the output end of the PLC controller 30 is connected to the control end of the pneumatic ball valve V and the control end of the heating device B, and is used to output a first control signal to the pneumatic ball valve V and a second control signal to the heating device B; the mouth of the gas cylinder A is connected to one end of the first pipeline 10, the other end of the first pipeline 10 is connected to one end of the pneumatic ball valve V, the other end of the pneumatic ball valve V is connected to the GIS device, and the gas cylinder A stores SF6 gas and is used to release SF6 gas to the GIS device through the first pipeline 10 and the pneumatic ball valve V; the manual ball valve Q is arranged on the first pipeline 10, between the pneumatic ball valve V and the gas cylinder A, and is used to make the first pipeline 10 conduct or cut off; the heating device B is fixed on the body of the gas cylinder A and is used to receive the second control signal and heat the gas cylinder A; the pneumatic ball valve V is used to receive the first control signal and is used to make the GIS device and the manual ball valve Q conduct or cut off; the inlet of the heat dissipation device T1 is used to access SF6 gas, the outlet is connected to one end of the second pipeline 20, and the other end of the second pipeline 20 is connected to the other end of the pneumatic ball valve V, and is used to cool the SF6 gas flowing into the gas cylinder A; the output end of the weighing sensor C is connected to the PLC controller 30, and is arranged at the bottom of the gas cylinder A and is used to obtain the weight of the gas cylinder A and output the weight to the PLC controller; among them, the gas cylinder A, the heating device B, the weighing sensor C, the pneumatic ball valve V, and the manual ball valve Q are all at least one, and the number of the gas cylinder A, the heating device B, the weighing sensor C, the pneumatic ball valve V, and the manual ball valve Q is the same. In this embodiment, the gas cylinders (A1 - A6), the heating devices (B1 - B6), the weighing sensors (C1 - C6), the pneumatic ball valves (V1 - V6), and the manual ball valves (Q1 - Q6) are all six. In this application, by connecting the inlet of the heat dissipation device to SF6 gas, connecting the outlet of the heat dissipation device to one end of the second pipeline, and connecting the other end of the second pipeline to the other end of the pneumatic ball valve, the SF6 gas flowing into the gas cylinder can be cooled, the temperature of the SF6 gas in the gas cylinder can be reduced quickly, and then the SF6 gas can be liquefied quickly, improving the efficiency of the gas cylinder to recover the external SF6 gas; at the same time, by fixing the heating device on the body of the gas cylinder and heating the gas cylinder after receiving the second control signal output by the PLC controller, the SF6 gas in the gas cylinder can be quickly vaporized, which is convenient for releasing SF6 gas to the GIS device and avoids the safety hazards brought by the method of pouring hot water to vaporize the SF6 gas in the gas cylinder.

[0045] In one embodiment, asFigure 1 As shown in the figure, the SF6 gas recovery and release system further includes: a first pressure sensor P1 and a second pressure sensor P2. Among them, the output end of the first pressure sensor P1 is connected to the PLC controller 30, and it is arranged at one end of the pneumatic ball valve V close to the GIS device, and is used to detect the first pressure of the SF6 gas released to the GIS device through the pneumatic ball valve V, and output the first pressure to the PLC controller 30; the output end of the second pressure sensor P2 is connected to the PLC controller 30, and it is arranged at the inlet of the heat dissipation device T1, and is used to detect the second pressure of the SF6 gas entering the heat dissipation device T1, and output the second pressure to the PLC controller 30.

[0046] In one embodiment, as Figure 1 As shown in the figure, the SF6 gas recovery and release system further includes: a pneumatic pump 600 and a gas storage tank 700. Among them, the output end of the pneumatic pump 600 is connected to the gas storage tank 700, and is used to supplement gas to the gas storage tank 700; the output end of the gas storage tank 700 is connected to a plurality of the pneumatic ball valves V, and is used to provide compressed air to a plurality of the pneumatic ball valves V.

[0047] In one embodiment, as Figure 1 As shown in the figure, the SF6 gas recovery and release system further includes: a temperature sensor 300 and a refrigerator 200. Among them, the output end of the temperature sensor 300 is connected to the PLC controller 30, and is used to detect the temperature data of the environment where a plurality of cylinders A are located, and output the temperature data to the PLC controller 30; the control end of the refrigerator 200 is connected to the PLC controller 30, and the PLC controller 30 is further used to receive the temperature data and output a third control signal to the refrigerator 200, and the refrigerator 200 is used to receive the third control signal and refrigerate the environment where a plurality of cylinders A are located.

[0048] In one embodiment, as Figure 1 As shown in the figure, the SF6 gas recovery and release system further includes: an SF6 gas detection sensor 400 and an exhaust fan 500. Among them, the output end of the SF6 gas detection sensor 400 is connected to the PLC controller 30, and is used to detect the SF6 gas content in the environment where a plurality of cylinders A are located, and output the SF6 gas content to the PLC controller 30; the control end of the exhaust fan 500 is connected to the PLC controller 30, and the PLC controller 30 is further used to receive the SF6 gas content and output a fourth control signal to the exhaust fan 500, and the exhaust fan 500 is used to receive the fourth control signal and discharge the SF6 gas existing in the environment where the cylinders A are located.

[0049] In one embodiment, as Figure 1 shown, the SF6 gas recovery and release system further includes: a display screen 40, wherein the input end of the display screen 40 is connected to the PLC controller 30, and is configured to receive the first pressure, the second pressure, the temperature data, and the SF6 gas content output by the PLC controller 30, and display the first pressure, the second pressure, the temperature data, and the SF6 gas content.

[0050] In one embodiment, the heating device B is a coiled copper finned tube.

[0051] The present application further provides an SF6 gas recovery and release device, as Figure 1 shown, including: a housing 900, a heat preservation bin 800, a first door body and a second door body oppositely arranged on the heat preservation bin 800, and the SF6 gas recovery and release system as described above; the heat preservation bin 800 is arranged inside the housing 900, and a plurality of the gas cylinders A, a plurality of the heating devices B, a plurality of the weighing sensors C, a plurality of the manual ball valves Q, a heat dissipation device T1, the refrigerator 200, the temperature sensor 300, the SF6 gas detection sensor 400, and the exhaust fan 500 are all arranged inside the heat preservation bin 800; a plurality of the pneumatic ball valves V, the pneumatic pump 600, the gas storage tank 700, the first pressure sensor P1, the second pressure sensor P2, the PLC controller 30, and the display screen 40 are arranged between the housing 900 and the heat preservation bin 800.

[0052] In one embodiment, as Figure 1 shown, the SF6 gas recovery and release system further includes: a first camera J1, a second camera J2, and a third camera J3, wherein the output end of the first camera J1 is connected to the display screen 40, and is arranged between the housing 900 and the heat preservation bin 800, and is configured to acquire a first space formed between the housing 900 and the heat preservation bin 800, acquire first video information of the first space, and output the first video information to the display screen 40; the output end of the second camera J2 is connected to the display screen 40, and is arranged inside the heat preservation bin 800, and is configured to acquire second video information inside the heat preservation bin 800, and output the second video information to the display screen 40; the output end of the third camera J3 is connected to the display screen 40, and is arranged inside the heat preservation bin 800, and is oppositely arranged with the second camera J2, and is configured to acquire third video information inside the heat preservation bin 800, and output the third video information to the display screen 40.

[0053] In one embodiment, as Figure 1As shown in the figure, the SF6 gas recovery and release system further includes: a first position switch 101 and a second position switch 102. Among them, the output end of the first position switch 101 is connected to the PLC controller 30 and is arranged at the first door body, and is used for obtaining the first switch state information of the first door body and outputting the first switch state information to the PLC controller 30; the output end of the second position switch 102 is connected to the PLC controller 30 and is arranged at the second door body, and is used for obtaining the second switch state information of the second door body and outputting the second switch state information to the PLC controller 30.

[0054] The working principle of this application is as follows:

[0055] According to the physical properties of SF6 gas, when the temperature is 20°C and the absolute pressure is 2.25 Mpa, SF6 gas is in a liquid state. Only in the liquid state can the filling speed of SF6 into bottles (i.e., recycling into gas cylinders) be the fastest. Heating devices are installed at the fixed positions of each gas cylinder on the gas cylinder cluster bracket. When inflation is required on-site, the gas cylinders are heated with controllable temperature to accelerate the evaporation of SF6 gas, enabling rapid inflation in the gaseous state. Moreover, all the SF6 gas in the gas cylinders can be vaporized, maximizing the use of the gas in the gas cylinders, avoiding excessive gas remaining in the gas cylinders due to non-vaporization or slow vaporization, achieving efficient utilization and reducing waste. In addition, the weighing sensor can accurately display the weight of the SF6 gas remaining in the gas cylinder, facilitating the judgment of whether the SF6 gas in the gas cylinder can continue to be used. The gas cylinders are placed in a thermal insulation warehouse, which is equipped with a refrigerator and a temperature sensor, and has excellent thermal insulation effect. The refrigerator rapidly circulates and cools the air in the thermal insulation warehouse, and the spiral copper finned tubes, pipelines, and gas cylinders in the thermal insulation warehouse are rapidly cooled. In this way, when filling the bottles, the compressed and relatively high-temperature SF6 gas is cooled. On the one hand, it makes the SF6 gas liquefy more rapidly; on the other hand, the pressure requirement for the outlet of the compressor on the SF6 recovery device becomes smaller, effectively improving the working efficiency and service life of the compressor. However, the temperature in the thermal insulation warehouse also needs to be controlled. Although the lower the better, it will have a certain impact on the performance of the gas cylinders, valves, and connectors. At the same time, too low a temperature also affects the economy. Therefore, the temperature sensor 300 is used to control the temperature in the thermal insulation warehouse within a certain range, as long as it meets the proportional relationship between the liquefaction physical properties of SF6 gas and the pressure, achieving both economy and efficiency. Each gas cylinder connection pipeline is equipped with a pneumatic ball valve and a manual ball valve. This facilitates the selective filling of a certain gas cylinder and the inflation of GIS equipment, and this function can be achieved through various combinations. The pneumatic ball valve mainly realizes the functional control during the inflation of a single bottle or multiple bottles. The function of the manual ball valve at the bottle mouth is to effectively isolate the gas between the pipeline and the gas cylinder when replacing the gas cylinder, preventing the gas in the pipeline from leaking out during the replacement of the gas cylinder, playing a role in environmental protection. The door of the thermal insulation warehouse is designed with a double-sided opening structure, that is, a first door body and a second door body are set, facilitating the loading and unloading of gas cylinders on both sides. Moreover, the gas cylinders are installed independently of each other without mutual influence. The space of the double-sided opening door ensures the convenient loading and unloading of gas cylinders and improves the working efficiency. For the control valves of each branch pipeline in the multi-bottle state, pneumatic ball valves are adopted, and a pneumatic pump 600 and a gas storage tank 700 are equipped. Equipping pneumatic ball valves solves the situation where solenoid valves may not be able to open under high-pressure conditions on the one hand. On the other hand, solenoid valves must maintain continuous power supply, and power outages often occur for unknown reasons on-site. To avoid the impact of power outages on the safety of the equipment, pneumatic ball valves are selected. At the same time, a gas storage tank 700 is equipped. Even if there is a power outage, the compressed air in the gas storage tank 700 can ensure the opening and closing of the pneumatic ball valve, ensuring the safety of the system.During the operation of the system, the insulation bin is in a closed state. In order to observe the internal situation, a first camera J1, a second camera J2, and a third camera J3 are configured in the insulation bin. The status of all components inside the insulation bin can be observed on the display screen 40, improving the observability of malfunction. A first position switch 101 and a second position switch 102 are respectively set on the first door body and the second door body of the insulation bin. Only when the system is in a stopped working state can the first door body and the second door body of the insulation bin be opened; otherwise, an alarm will be given immediately to indicate that it is not allowed to open. If the first door body and the second door body are not closed properly, the system will also give an alarm and indicate that the first door body and the second door body are not closed tightly.

[0056] The above-disclosed are only the preferred embodiments of the present utility model. Certainly, the scope of rights of the present utility model cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present utility model still fall within the scope covered by the present utility model.

Claims

1. An SF6 gas recovery and release system, characterized in that, Including: A PLC controller, whose output terminal is connected to the control terminal of the pneumatic ball valve and the control terminal of the heating device, and is used to output a first control signal to the pneumatic ball valve and a second control signal to the heating device; A gas cylinder, whose bottle mouth is connected to one end of a first pipeline, the other end of the first pipeline is connected to one end of the pneumatic ball valve, the other end of the pneumatic ball valve is connected to the GIS device, and the gas cylinder stores SF6 gas and is used to release SF6 gas to the GIS device through the first pipeline and the pneumatic ball valve; A manual ball valve, which is arranged on the first pipeline and is located between the pneumatic ball valve and the gas cylinder, and is used to make the first pipeline conduct or cut off; The heating device, which is fixed on the body of the gas cylinder and is used to receive the second control signal and heat the gas cylinder; The pneumatic ball valve, which is used to receive the first control signal and is used to make the GIS device and the manual ball valve conduct or cut off; A heat dissipation device, whose inlet is used to access SF6 gas, and the outlet is connected to one end of a second pipeline, the other end of the second pipeline is connected to the other end of the pneumatic ball valve, and is used to cool the SF6 gas flowing into the gas cylinder; A weighing sensor, whose output terminal is connected to the PLC controller, is arranged at the bottom of the gas cylinder, and is used to obtain the weight of the gas cylinder and output the weight to the PLC controller; Wherein, the gas cylinder, the heating device, the weighing sensor, the pneumatic ball valve and the manual ball valve are all at least one, and the number of the gas cylinder, the heating device, the weighing sensor, the pneumatic ball valve and the manual ball valve is the same.

2. The SF6 gas recovery and release system according to claim 1, wherein It further includes: A first pressure sensor, whose output terminal is connected to the PLC controller, is arranged at one end of the pneumatic ball valve close to the GIS device, and is used to detect the first pressure of the SF6 gas released to the GIS device through the pneumatic ball valve and output the first pressure to the PLC controller; A second pressure sensor, whose output terminal is connected to the PLC controller, is arranged at the inlet of the heat dissipation device, and is used to detect the second pressure of the SF6 gas entering the heat dissipation device and output the second pressure to the PLC controller.

3. The SF6 gas recovery and release system according to claim 1, wherein, It further includes: A pneumatic pump, whose output terminal is connected to an air storage tank and is used to supplement gas to the air storage tank; The air storage tank, whose output terminal is connected to a plurality of the pneumatic ball valves and is used to provide compressed air to the plurality of pneumatic ball valves.

4. The SF6 gas recovery and release system according to claim 2, characterized in that, It further includes: A temperature sensor, whose output terminal is connected to the PLC controller, is used to detect the temperature data of the environment where a plurality of the gas cylinders are located and output the temperature data to the PLC controller; A refrigerator, whose control terminal is connected to the PLC controller, the PLC controller is further used to receive the temperature data and output a third control signal to the refrigerator, and the refrigerator is used to receive the third control signal and refrigerate the environment where a plurality of the gas cylinders are located.

5. The SF6 gas recovery and release system according to claim 4, wherein It further includes: The SF6 gas detection sensor, whose output end is connected to the PLC controller, is used to detect the SF6 gas content in the environment where multiple cylinders are located and output the SF6 gas content to the PLC controller; The exhaust fan, whose control end is connected to the PLC controller. The PLC controller is further used to receive the SF6 gas content and output a fourth control signal to the exhaust fan. The exhaust fan is used to receive the fourth control signal and discharge the SF6 gas existing in the environment where the cylinders are located.

6. The SF6 gas recovery and release system according to claim 4, wherein It further includes: The display screen, whose input end is connected to the PLC controller, is used to receive the first pressure, the second pressure, the temperature data, and the SF6 gas content output by the PLC controller, and display the first pressure, the second pressure, the temperature data, and the SF6 gas content.

7. The SF6 gas recovery and release system according to claim 1, wherein The heating device is a coiled copper finned tube.

8. An SF6 gas recovery and release device, characterized in that, It includes: The shell, the thermal insulation bin, the first door and the second door oppositely arranged on the thermal insulation bin, and the SF6 gas recovery and release system according to any one of claims 1 - 7. The thermal insulation bin is arranged inside the shell. Multiple cylinders, multiple heating devices, multiple weighing sensors, multiple manual ball valves, a heat dissipation device, the refrigerator, the temperature sensor, the SF6 gas detection sensor, and the exhaust fan are all arranged inside the thermal insulation bin; Multiple pneumatic ball valves, the pneumatic pump, the gas storage tank, the first pressure sensor, the second pressure sensor, the PLC controller, and the display screen are arranged between the shell and the thermal insulation bin.

9. The SF6 gas recovery and release device according to claim 8, characterized in that, It further includes: The first camera, whose output end is connected to the display screen, is arranged between the shell and the thermal insulation bin, is used to obtain the first space formed between the shell and the thermal insulation bin, obtain the first video information of the first space, and output the first video information to the display screen; The second camera, whose output end is connected to the display screen, is arranged inside the thermal insulation bin, is used to obtain the second video information inside the thermal insulation bin, and output the second video information to the display screen; The third camera, whose output end is connected to the display screen, is arranged inside the thermal insulation bin and is oppositely arranged with the second camera, is used to obtain the third video information inside the thermal insulation bin, and output the third video information to the display screen.

10. The SF6 gas recovery and release device according to claim 9, characterized in that, It further includes: The first position switch, whose output end is connected to the PLC controller, is arranged at the first door, is used to obtain the first switch state information of the first door, and output the first switch state information to the PLC controller; The second position switch, whose output end is connected to the PLC controller, is arranged at the second door, is used to obtain the second switch state information of the second door, and output the second switch state information to the PLC controller.

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