SF6 gas flushing pressurizing device

Abstract

The application belongs to the field of gaseous liquefaction and provides an SF6 gas flushing pressurizing device, which comprises a pressure tank, airtight mechanisms arranged at the front and rear ends of the pressure tank, a sulfur hexafluoride liquefying mechanism arranged in the pressure tank, an air inlet valve and an air outlet valve arranged on the side wall of the pressure tank, and a circulating gas pipe connected to the end of the air inlet valve and the air outlet valve; a quantitative pipe is arranged at the bottom of the pressure tank, the top end of the quantitative pipe is airtightly connected to the bottom of the pressure tank, and a constant-pressure hose is arranged at the bottom end of the quantitative pipe. In use, the sulfur hexafluoride gas to be treated is introduced into the air inlet valve, the excess gas in the pressure tank is discharged from the air outlet valve and recovered, and at the same time, the two cooling interfaces are connected to the circulating liquid nitrogen, the liquid nitrogen absorbs the heat of the sulfur hexafluoride gas after passing through the heat exchange coil, the sulfur hexafluoride gas can be condensed into liquid at standard atmospheric pressure and minus sixty-three degrees Celsius, and the sulfur hexafluoride substance is collected in the pressure tank.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of gaseous liquefaction, and particularly relates to a SF6 gas flushing pressurizing device. BACKGROUND

[0002] With the development of industrial technology, modern gaseous liquefaction technology is developing more and more perfect, and sulfur hexafluoride is a chemically stable inert gas. Sulfur hexafluoride gas can still maintain high stability in a high-temperature environment, and sulfur hexafluoride can be used for arc extinguishing in a circuit system.

[0003] The patent CN113330263B discloses a gas liquefaction device capable of supplying high-pressure natural gas in a device for efficiently liquefying raw gas using the cold energy of liquefied natural gas, and a gas liquefaction method using the gas liquefaction device. The gas liquefaction device includes: a main heat exchanger that cools raw gas compressed by a first compressor; a first pressure reducing valve that decompresses and cools the raw gas; a gas-liquid separator that causes the raw gas discharged from the first pressure reducing valve to undergo gas-liquid separation; a first pump that pressurizes the liquefied natural gas to a first pressure; and a second pump that pressurizes the liquefied natural gas to a second pressure higher than the first pressure, wherein heat exchange is performed in the main heat exchanger between the raw gas on one side and the liquefied natural gas pressurized by the first pump and the liquefied natural gas pressurized by the second pump on the other side;

[0004] The device still has defects in use. Firstly, the device has a problem in the treatment of liquefied natural gas. The pressure of liquefied natural gas is relatively high, which requires high sealing and pressure resistance of the pipe body, resulting in gas leakage failure during gas treatment. Secondly, the injection amount of the gas in the previous pressurizing and gas filling device is difficult to control, and the amount of injected gas is prone to be more or less, which is not accurate for gas delivery. SUMMARY

[0005] The present application aims at the deficiencies of the prior art, and provides a SF6 gas flushing pressurizing device. In use, the sulfur hexafluoride gas to be treated is introduced into the gas inlet valve, the excess gas in the pressure tank is discharged from the gas outlet valve and recovered, and at the same time, the two cooling interfaces are connected to the circulating liquid nitrogen. The liquid nitrogen absorbs the heat of the sulfur hexafluoride gas after passing through the heat exchange coil. The sulfur hexafluoride gas can be condensed into a liquid at standard atmospheric pressure and minus sixty-three degrees Celsius. The sulfur hexafluoride substance can be collected in the pressure tank. If there is no liquid nitrogen, other cooling substances can be introduced into the heat exchange coil. If the temperature of the cooling substance is higher than minus sixty-three degrees Celsius, the threshold of the gas pressure of the gas outlet valve is adjusted higher, so that the sulfur hexafluoride can become a liquid at high pressure and higher than minus sixty-three degrees Celsius, thereby solving the problems mentioned in the background.

[0006] To solve the above problems, the present application provides the following technical solutions: a SF6 gas flushing pressurizing device, comprising a pressure tank, a sealing mechanism is arranged at the front and rear ends of the pressure tank, a sulfur hexafluoride liquefaction mechanism is arranged in the pressure tank, an air inlet valve and an air outlet valve are arranged on the side wall of the pressure tank, and the end of the air inlet valve and the air outlet valve is connected with a circulating gas pipe; a quantitative pipe is arranged at the bottom of the pressure tank, the top end of the quantitative pipe is connected with the bottom of the pressure tank, a constant pressure hose is arranged at the bottom end of the quantitative pipe, an air cylinder is arranged at the bottom end of the constant pressure hose, a metering mechanism is arranged in the quantitative pipe, a heating mechanism is arranged in the side wall of the constant pressure hose, and an air charging mechanism is arranged in the air cylinder; the sulfur hexafluoride liquefaction mechanism comprises a heat exchange coil fixedly arranged in the pressure tank, heat exchange tiles are arranged on the side wall of the heat exchange coil, and circulating pipes are arranged at the two ends of the heat exchange coil, the ends of the circulating pipes extend to the outside of the pressure tank, and the ends of the circulating pipes are provided with cooling interfaces, and the two cooling interfaces are connected with circulating liquid nitrogen.

[0007] In use, the sulfur hexafluoride gas to be treated is introduced into the air inlet valve, the excess gas pressure in the pressure tank is discharged from the air outlet valve and recovered, and at the same time, the two cooling interfaces are connected with the circulating liquid nitrogen, the liquid nitrogen starts to absorb the heat of the sulfur hexafluoride gas after passing through the heat exchange coil, the sulfur hexafluoride gas can be condensed into a liquid at a standard atmospheric pressure and minus sixty-three degrees Celsius, and the sulfur hexafluoride substance is conveniently collected in the pressure tank.

[0008] Further, the air charging mechanism comprises a telescopic head in the air cylinder, a sliding channel that closely fits the telescopic head is arranged in the air cylinder, the sliding channel of the air cylinder is a double-layer clamping mechanism, a plurality of air exhaust eyes in a horizontal array are arranged on the inner layer of the sliding channel, a butt joint slot that is in butt joint with the air exhaust eyes is arranged on the side wall of the telescopic head, an injection head is arranged at the end of the telescopic head opposite to the air cylinder, a blocking mechanism is arranged at the port of the sliding channel, a pull handle is arranged on the outer side wall of the air cylinder, and the inner end of the telescopic head and the inner side wall of the sliding channel are connected through a reset spring.

[0009] In use, when the staff holds the pull handle, the injection head is aimed at the air inlet of the electrical box and pressed, the gas is discharged from the injection head when the butt joint slot on the side wall of the telescopic head is in butt joint with the air exhaust eyes, and the rate of gas discharge depends on how many air exhaust eyes are in butt joint with the butt joint slot.

[0010] Further, the sealing mechanism comprises two sealing cover plates, which are sealingly plugged on the ports at the front and rear of the pressure tank.

[0011] In use, if there is no liquid nitrogen, other cooling material can be passed through the heat exchange coil, if the temperature of the cooling material is higher than minus sixty-three degrees Celsius, the threshold of the outlet valve is adjusted to be higher, and then the sulfur hexafluoride of the outlet valve can become liquid under high pressure and higher than minus sixty-three degrees Celsius.

[0012] Further, the side wall of the pressure tank and the sealing cover plate is a double-layer structure, the internal gap of the pressure tank and the sealing cover plate is vacuumized, and a plurality of support members are arranged in the internal gap of the pressure tank and the sealing cover plate, the support member comprises a heat insulation block, the material of the heat insulation block is polystyrene, and the heat insulation block is thick at both ends and thin in the middle.

[0013] In use, the internal gap of the pressure tank and the sealing cover plate is vacuumized, which has a good heat insulation effect, and polystyrene has a supporting effect to prevent the internal gap of the pressure tank and the sealing cover plate from being crushed.

[0014] Further, the heat exchange tile comprises a copper sheet, the copper sheet is provided with heat-conducting perforations matched with the heat exchange coil, and the front end and the rear end of the heat exchange coil are provided with fans, and the airflow channels of the two fans pass through the center of the heat exchange coil and the gap between the copper sheet.

[0015] In use, the fans drive airflow to pass through the heat exchange coil and the copper sheet to transfer heat, and after the heat of sulfur hexafluoride is taken away, the sulfur hexafluoride can become liquid and condense on the surface of the heat exchange coil and the copper sheet and be collected at the bottom of the pressure tank.

[0016] Further, the metering mechanism comprises a plurality of layers of inner tank tiles in the quantitative tube, each layer of inner tank tile is in the shape of a cylindrical barrel, the top end of the quantitative tube is provided with an inlet valve, the lower end of the quantitative tube is provided with an outlet valve, the inlet valve is connected to the inside of the pressure tank, and the outlet valve is connected to the constant-pressure hose.

[0017] In use, when the inlet valve is opened, liquid sulfur hexafluoride enters the inside of the quantitative tube, and then the total amount of liquid sulfur hexafluoride is accurate, which is convenient for subsequent quantitative discharge, and if it is necessary to change the volume of the inside of the quantitative tube, the inner tank tile can be added or removed.

[0018] Further, the heating mechanism comprises an electric heating wire in the side wall of the quantitative tube and the constant-pressure hose.

[0019] In use, after the inside of the quantitative tube is filled with liquid sulfur hexafluoride, the inlet valve is locked, then the outlet valve is completely opened and the liquid sulfur hexafluoride is heated, at this time, the liquid sulfur hexafluoride can completely become gaseous and be discharged from the air cylinder.

[0020] Further, the blocking mechanism comprises a limiting ring at the sliding channel port, and the limiting ring is fixed on the sliding channel port through bolts.

[0021] In use, the limiting ring can limit the telescopic head from falling out.

[0022] Compared with the prior art, the embodiment of the application has the following beneficial effects:

[0023] Firstly, when the device is in use, the six fluorine sulfur gas to be treated is introduced into the inlet valve, the excess gas in the pressure tank is discharged from the outlet valve and recovered, and at the same time, the two cooling interfaces are connected to the circulating liquid nitrogen, the liquid nitrogen starts to absorb the heat of the six fluorine sulfur gas after passing through the heat exchange coil, the six fluorine sulfur gas can be condensed into a liquid at a standard atmospheric pressure and minus sixty-three degrees Celsius, and the six fluorine sulfur substance is collected in the pressure tank, if there is no liquid nitrogen, other cooling substances can be introduced into the heat exchange coil, if the temperature of the cooling substance is higher than minus sixty-three degrees Celsius, the threshold of the gas pressure of the outlet valve is adjusted to be higher, and then the six fluorine sulfur can become a liquid at a high pressure and higher than minus sixty-three degrees Celsius.

[0024] Secondly, when the liquid inlet valve is opened, the liquid six fluorine sulfur enters the quantitative pipe, after the quantitative pipe is filled with liquid six fluorine sulfur, the liquid inlet valve is locked, then the liquid outlet valve is completely opened and the liquid six fluorine sulfur is heated, at this time, the liquid six fluorine sulfur can completely become a gas and be discharged from the inflator, when the staff holds the lifting handle, the injection head is aimed at the air inlet of the electrical box and pressed, when the butt joint slot on the side wall of the telescopic head and the exhaust eye are butted, the gas can be discharged from the injection head, and the rate of gas discharge depends on how many exhaust eyes are butted by the butt joint slot. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic view of the present application.

[0026] Figure 2 It is a schematic view of the present application.

[0027] Figure 3 It is a schematic view of the pressure tank of the present application.

[0028] Figure 4 It is a schematic view of the heat exchange coil of the present application.

[0029] Figure 5 It is a schematic view of the quantitative pipe of the present application.

[0030] Figure 6 It is a schematic view of the inflator of the present application.

[0031] Figure 7 It is a schematic view of the inflator of the present application.

[0032] Figure 8 It is a schematic view of the present application Figure 7A partial enlarged view of the A.

[0033] Figure 9 A schematic view of the heat insulation block of the present application.

[0034] Explanation of reference signs:

[0035] Pressure tank 1, airtight cover plate 101, heat insulation block 102, metering tube 2, liquid inlet valve 201, liquid outlet valve 202, inner tank tile 203, constant pressure hose 3, air cylinder 4, pull handle 401, limiting ring 402, air inlet valve 5, air outlet valve 501, circulating air pipe 502, cooling interface 6, fan 7, heat exchange coil 8, circulating pipe 801, copper sheet 802, telescopic head 9, butt joint slot 901, injection head 902, return spring 10, air exhaust eye 1001. DETAILED DESCRIPTION

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the description and claims of this application as well as the above discussion of the related art are intended to be illustrative only and not restrictive. The use herein of terms such as "comprise", "comprises" or "comprising" or "include", "includes" or "including" is intended to be understood in a non-exclusive way, such that the process, method, article, composition or apparatus that "comprises", "comprises" or "comprising" or "include", "includes" or "including" something also comprises, includes or includes something else, whether or not this something else is also explicitly mentioned.

[0037] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment. It is explicitly contemplated that embodiments described herein can be combined with each other.

[0038] The present application provides a SF6 gas flushing pressurizing device, such as Figures 1-9As shown, including the pressure tank 1, the front and rear ends of the pressure tank 1 are provided with sealing mechanisms, the inside of the pressure tank 1 is provided with a sulfur hexafluoride liquefaction mechanism, the side wall of the 1 is provided with an air inlet valve 5 and an air outlet valve 501, the end of the air inlet valve 5 and the air outlet valve 501 is connected with a circulating gas pipe 502; The bottom of the pressure tank 1 is provided with a dosing tube 2, the top end of the dosing tube 2 is sealed to the bottom of the pressure tank 1, the bottom end of the dosing tube 2 is provided with a constant pressure hose 3, the bottom end of the constant pressure hose 3 is provided with an air cylinder 4, the inside of the dosing tube 2 is provided with a metering mechanism, the side wall of the constant pressure hose 3 is provided with a heating mechanism, the inside of the air cylinder 4 is provided with an inflation mechanism; The sulfur hexafluoride liquefaction mechanism includes a heat exchange coil 8 fixedly arranged in the pressure tank 1, the side wall of the heat exchange coil 8 is provided with a heat exchange tile, both ends of the heat exchange coil 8 are provided with a circulating pipe 801, the end of the circulating pipe 801 extends to the outside of the pressure tank 1, and the end of the circulating pipe 801 is provided with a cooling interface 6, and the two cooling interfaces 6 are connected with circulating liquid nitrogen.

[0039] In this embodiment, the sulfur hexafluoride gas to be treated is introduced into the air inlet valve 5, the excess gas in the pressure tank 1 is discharged from the air outlet valve 501 and recovered, and at the same time, the two cooling interfaces 6 are connected with the circulating liquid nitrogen, and after the liquid nitrogen passes through the heat exchange coil 8, it begins to absorb the heat of the sulfur hexafluoride gas. The sulfur hexafluoride gas can be condensed into a liquid at standard atmospheric pressure and minus sixty-three degrees Celsius, and the sulfur hexafluoride substance is collected in the pressure tank 1.

[0040] In further embodiments of the application, as shown, Figures 6-8 The inflation mechanism includes a telescopic head 9 in the air cylinder 4, the inside of the air cylinder 4 is provided with a sliding channel closely attached to the telescopic head 9, the sliding channel of the air cylinder 4 is a double-layer clamping mechanism, the inner layer of the sliding channel is provided with a row of exhaust holes 1001 arranged in a character shape, the side wall of the telescopic head 9 is provided with a butt joint slot 901 butt jointed with the exhaust holes 1001, one end of the telescopic head 9 opposite to the air cylinder 4 is provided with an injection head 902, the port of the sliding channel is provided with a blocking mechanism, the outer side wall of the air cylinder 4 is provided with a pull handle 401, and the inner end of the telescopic head 9 and the inner side wall of the sliding channel are connected through a reset spring 10.

[0041] In this embodiment, when the staff holds the pull handle 401, the injection head 902 is aligned with the air inlet of the electrical box and pressed, and when the butt joint slot 901 on the side wall of the telescopic head 9 is butt jointed with the exhaust holes 1001, the gas can be discharged from the injection head 902, and the rate of gas discharge depends on how many exhaust holes 1001 are butt jointed with the butt joint slot 901.

[0042] In further embodiments of the application, as shown, Figures 1-3As shown, the sealing mechanism includes two sealing cover plates 101, which are sealed and blocked on the front and rear ports of the pressure tank 1.

[0043] In this embodiment, if there is no liquid nitrogen, other cooling substances can be passed through the heat exchange coil 8, and if the temperature of the cooling substances is higher than minus sixty-three degrees Celsius, the threshold of the gas pressure of the outlet valve 501 is increased, and then the sulfur hexafluoride can become liquid in a high-pressure environment and at a temperature higher than minus sixty-three degrees Celsius.

[0044] In further embodiments of the present application, as shown in Figure 9 The side walls of the pressure tank 1 and the sealing cover plate 101 are double-layer structures, the internal space of the pressure tank 1 and the sealing cover plate 101 is evacuated, and a plurality of support members are arranged in the internal space of the pressure tank 1 and the sealing cover plate 101, the support members include heat insulation blocks 102, the material of the heat insulation blocks 102 is polystyrene, and the heat insulation blocks 102 are thick at both ends and thin in the middle.

[0045] In this embodiment, the internal space of the pressure tank 1 and the sealing cover plate 101 is evacuated, which has a good heat insulation effect, and polystyrene has a supporting effect to prevent the internal space of the pressure tank 1 and the sealing cover plate 101 from being flattened.

[0046] In further embodiments of the present application, as shown in Figures 1-4 The heat exchange tile includes a copper sheet 802, the copper sheet 802 is provided with heat-conducting perforations matched with the heat exchange coil 8, the front and rear ends of the heat exchange coil 8 are provided with fans 7, and the airflow passages of the two fans 7 pass through the center of the heat exchange coil 8 and the gap of the copper sheet 802.

[0047] In this embodiment, the fans 7 drive airflow to pass through the heat exchange coil 8 and the copper sheet 802 to transfer heat, and after the heat of the sulfur hexafluoride is taken away, the sulfur hexafluoride can become liquid and condense on the surfaces of the heat exchange coil 8 and the copper sheet 802 and be collected at the bottom of the pressure tank 1.

[0048] In further embodiments of the present application, as shown in Figures 1-5 The metering mechanism includes a plurality of layers of inner tank tiles 203 inside the metering tube 2, each layer of inner tank tile 203 is in the shape of a cylindrical tube, the top end of the metering tube 2 is provided with a liquid inlet valve 201, the lower end of the metering tube 2 is provided with a liquid outlet valve 202, the liquid inlet valve 201 is connected to the inside of the pressure tank 1, and the liquid outlet valve 202 is connected to the constant-pressure hose 3.

[0049] In this embodiment, when the liquid inlet valve 201 is opened, liquid sulfur hexafluoride enters the inside of the metering tube 2, and then the total amount of liquid sulfur hexafluoride is accurate, which is convenient for subsequent quantitative discharge, and if it is necessary to change the volume inside the metering tube 2, the inner tank tile 203 can be installed or removed.

[0050] As shown in the further embodiment of the present application, Figures 1-5 The heating mechanism comprises an electric heating wire in the sidewall of the dosing tube 2 and the constant pressure hose 3.

[0051] In this embodiment, after the dosing tube 2 is filled with liquid sulfur hexafluoride, the liquid inlet valve 201 is locked, then the liquid outlet valve 202 is fully opened and the liquid sulfur hexafluoride is heated, at this time, the liquid sulfur hexafluoride can be completely changed into gas and discharged from the inflator 4.

[0052] As shown in the further embodiment of the present application, Figures 6-8 The blocking mechanism comprises a limiting ring 402 at the sliding channel port, and the limiting ring 402 is fixed on the sliding channel port by bolts.

[0053] In this embodiment, the limiting ring 402 can limit the telescopic head 9 from falling off.

[0054] It should be noted that, for the above-mentioned embodiments, in order to simply describe, they are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the described action sequence, because according to the present application, some steps can be performed in other order or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions and modules involved are not necessarily necessary for the present application.

[0055] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented by other ways. For example, the above-mentioned device embodiments are only illustrative, for example, the division of the above-mentioned units, actual implementation can have another division way, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or communication connection between the displayed or discussed units can be through some interfaces, indirect coupling or communication connection between devices or units, which can be electrical or other forms.

[0056] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on multiple network units. According to actual needs, some or all of the units can be selected to achieve the purpose of the embodiment.

[0057] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the protection scope of the present application. Obviously, the described examples are only some of the embodiments of the present application, but not all the embodiments. Based on these examples, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application. Although the present application is described in detail with reference to the above examples, those of ordinary skill in the art can still combine, add or delete the features in the embodiments of the present application according to the circumstances without creative work, so as to obtain different other technical solutions which do not deviate from the concept of the present application in essence, and these technical solutions also fall within the scope of the present application.

Claims

1. An SF6 gas flushing pressurizing device, characterized by: The utility model provides a kind of sulfur hexafluoride liquidizing mechanism, which comprises a pressure tank (1), the front and rear ends of the pressure tank (1) are provided with sealing mechanisms, the inside of the pressure tank (1) is provided with a sulfur hexafluoride liquidizing mechanism, the side wall of the pressure tank (1) is provided with an air inlet valve (5) and an air outlet valve (501), the end of the air inlet valve (5) and the air outlet valve (501) is connected with a circulating gas pipe (502); the bottom of the pressure tank (1) is provided with a dosing tube (2), the top end of the dosing tube (2) is sealed to the bottom of the pressure tank (1), the bottom end of the dosing tube (2) is provided with a constant pressure hose (3), the bottom end of the constant pressure hose (3) is provided with an air cylinder (4), the inside of the dosing tube (2) is provided with a metering mechanism, the side wall of the constant pressure hose (3) is provided with a heating mechanism, and the inside of the air cylinder (4) is provided with an inflation mechanism; the sulfur hexafluoride liquidizing mechanism comprises a heat exchange coil (8) fixedly arranged in the pressure tank (1), the side wall of the heat exchange coil (8) is provided with a heat exchange tile, and the two ends of the heat exchange coil (8) are provided with circulating pipes (801), the ends of the circulating pipes (801) extend to the outside of the pressure tank (1), and the ends of the circulating pipes (801) are provided with cooling interfaces (6), and the two cooling interfaces (6) are connected with circulating liquid nitrogen; The metering mechanism comprises a plurality of layers of inner container tiles (203) in the dosing tube (2), each layer of the inner container tile (203) is in the shape of a cylindrical tube, the top end of the dosing tube (2) is provided with a liquid inlet valve (201), the lower end of the dosing tube (2) is provided with a liquid outlet valve (202), the liquid inlet valve (201) is connected to the inside of the pressure tank (1), and the liquid outlet valve (202) is connected to the constant pressure hose (3); The inflation mechanism comprises a telescopic head (9) in the air cylinder (4), the inside of the air cylinder (4) is provided with a sliding channel closely attached to the telescopic head (9), the sliding channel of the air cylinder (4) is a double-layer clamping seam mechanism, a plurality of air exhaust holes (1001) in the shape of a Chinese character are arranged on the inner layer of the sliding channel, the side wall of the telescopic head (9) is provided with a butt joint slot (901) opposite to the air exhaust holes (1001), one end of the telescopic head (9) opposite to the air cylinder (4) is provided with a injection head (902), the port of the sliding channel is provided with a blocking mechanism, the outer side wall of the air cylinder (4) is provided with a pull handle (401), and the inner end of the telescopic head (9) and the inner side wall of the sliding channel are connected through a return spring (10); The heating mechanism comprises an electric heating wire in the side wall of the dosing tube (2) and the constant pressure hose (3); The inside of the pressure tank (1) is standard atmospheric pressure.

2. The SF6 gas flushing pressurizing device according to claim 1, characterized in that: The sealing mechanism comprises two sealing cover plates (101), which are sealed and blocked on the ports of the front and rear of the pressure tank (1).

3. The SF6 gas flushing pressurizing device according to claim 2, characterized in that: The side wall of the pressure tank (1) and the sealing cover plate (101) is a double-layer structure, the internal gap of the pressure tank (1) and the sealing cover plate (101) is vacuumized, a plurality of supporting members are arranged in the internal gap of the pressure tank (1) and the sealing cover plate (101), the supporting members comprise heat insulation blocks (102), the material of the heat insulation blocks (102) is polystyrene, and the heat insulation blocks (102) are thick at both ends and thin in the middle.

4. The SF6 gas flushing pressurizing device according to claim 1, characterized in that: The heat exchange tile comprises copper sheets (802), the copper sheets (802) are provided with heat-conducting perforations matched with heat exchange coils (8), the front and rear ends of the heat exchange coils (8) are provided with fans (7), and the airflow channels of the two fans (7) pass through the center of the heat exchange coils (8) and the gap of the copper sheets (802).

5. The SF6 gas flushing pressurizing device according to claim 1, characterized in that: The blocking mechanism comprises a limiting ring (402) at the sliding channel port, and the limiting ring (402) is fixed on the sliding channel port through bolts.

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