Automatic mixing device for octafluoropropane processing

Abstract

The application belongs to the technical field of chemical devices, and particularly relates to a fluorine-nitrogen gas automatic mixing device for octafluoropropane processing, which aims at the problems that a connection with a larger joint is difficult to be monitored in real time and stably, lacks a leakage buffering mechanism when leakage occurs, and gas can quickly spread and enter a working environment without obstruction, and proposes the following scheme, which comprises a supporting frame, a mixing tank fixedly connected to the supporting frame, a pressure regulating valve located below the mixing tank, a leakage detection module, and a liquid layer formed on the connection with a larger joint by coating the connection with a surfactant solution. The fluorine-nitrogen gas automatic mixing device for octafluoropropane processing disclosed by the application realizes double leakage early warning of laser and electrochemical double sensors by forming a liquid layer on the connection with a larger joint by coating the connection with a surfactant solution, delays the gas leakage speed by bubble wrapping, and ensures the reliability of sealing detection to gain time for emergency disposal and improve operation safety.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of chemical devices, in particular to a fluorine-nitrogen gas automatic mixing device for octafluoropropane processing. BACKGROUND

[0002] Octafluoropropane (C3F8) is a perfluorinated propane, which is generated by replacing eight hydrogen atoms in a propane molecule with fluorine and belongs to inert fluorinated hydrocarbon organic compounds. The compound is a colorless gas at room temperature and is difficult to dissolve in water. The compound is mainly used in the microelectronic industry for plasma etching process and device surface cleaning, and is also applied to the fields of low-temperature refrigeration, medical gas and insulating medium. Safety protection measures need to be taken during use: when leakage occurs, a respirator needs to be worn and ventilation and dilution are needed, when inhaled poisoning occurs, the person needs to be transferred to a place with air flow and oxygen is needed to be supplied, and when fire extinguishing is needed, the gas source needs to be cut off and misty water needs to be sprayed for cooling.

[0003] In the prior art, since fluorine gas is a highly toxic gas, once leakage occurs, great danger will be caused. The connection with a larger joint (such as the discharge port of the mixing tank) is difficult to be monitored in real time and stably, the leakage of trace high-risk gas is difficult to be found in time, and when leakage occurs, there is a lack of leakage buffering mechanism, the gas will directly and quickly spread into the working environment without obstruction, resulting in extremely short emergency disposal time and high safety risk. SUMMARY

[0004] The application discloses a fluorine-nitrogen gas automatic mixing device for octafluoropropane processing, which aims to solve the technical problems that the connection with a larger joint is difficult to be monitored in real time and stably in the background art, and there is a lack of leakage buffering mechanism when leakage occurs, and the gas will quickly spread into the working environment without obstruction.

[0005] The fluorine-nitrogen gas automatic mixing device for octafluoropropane processing comprises a supporting frame.

[0006] A mixing tank is fixedly connected to the supporting frame.

[0007] A pressure regulating valve is located below the mixing tank and is connected in communication with the discharge port of the mixing tank.

[0008] A leakage detection module is arranged below the mixing tank, and the leakage detection module comprises a sliding ring frame fixedly connected to the lower end face of the mixing tank, a sliding table slidably connected to the sliding ring frame, a sliding groove formed in the sliding table, a sliding block slidably connected to the sliding groove, a rotating hole formed in the sliding block, a rotating liquid outlet pipe rotatably connected to the rotating hole, a plurality of liquid outlet holes circumferentially and equidistantly formed in the rotating liquid outlet pipe, a roller coating assembly arranged at the lower end of the rotating liquid outlet pipe, and a surfactant storage bottle arranged above the rotating liquid outlet pipe and connected in communication with the rotating liquid outlet pipe. The leakage detection module detects fluorine gas leakage at the connection of the discharge port.

[0009] The mixing auxiliary module is located in the interior of the mixing tank, and comprises two fixed ring frames, both of which are fixedly connected to the inner side wall of the mixing tank, and both of which are fixedly connected with annular pipes, and both of which are circumferentially and equidistantly provided with a plurality of nozzles, and the mixing auxiliary module is used for uniformly mixing two gases with different densities.

[0010] In a preferred scheme, the leakage detection module further comprises a transmission gear ring fixedly connected to the upper end surface of the sliding ring frame, and the sliding table is provided with a mounting groove, and the mounting groove is fixedly connected with a driving motor, and the output end of the driving motor is fixedly connected with a transmission gear, and the teeth of the transmission gear can be engaged with the transmission gear ring.

[0011] In a preferred scheme, the sliding table is provided with a fixing hole, and the fixing hole is fixedly connected with an electric telescopic rod, and the driving end of the electric telescopic rod is fixedly connected to one side of the sliding block.

[0012] In a preferred scheme, the sliding table is provided with two sliding groove holes, and both of which are slidingly connected with sliding rod members, and both of which are fixedly connected with mounting members at the lower ends, and both of which are provided with a secure hole, and one of which is fixedly connected with an electrochemical sensor, and the other of which is fixedly connected with a laser sensor, and the opposite two sides of the sliding block are fixedly connected with pull ropes, and both of which are fixedly connected to one side of the corresponding mounting member away from the sliding block.

[0013] In a preferred scheme, the inner wall of the sliding table is fixedly connected with two symmetrical fixed plate members, both of which are provided with a circular hole, and both of which are located in the corresponding circular hole, and both of which are externally surrounded by a return spring at the end close to the mounting member, and both of which are fixedly connected to the corresponding fixed plate member at one end, and the other end is fixedly connected to the corresponding mounting member.

[0014] In a preferred scheme, the sliding table is provided with two movable holes, both of which are rotatably connected with rotating shafts, and both of which are fixedly connected with guide wheels, and both of which are slidingly connected to the outside of the corresponding guide wheel.

[0015] In a preferred scheme, the mixing auxiliary module further comprises a universal motor fixedly connected to the upper side of the mixing tank, and the top of the mixing tank is provided with a magnetic coupler, and the driving end of the universal motor is fixedly connected with one end of the magnetic coupler, and the other end of the magnetic coupler away from the universal motor is fixedly connected with a rotating rod member.

[0016] In a preferred scheme, the outer part of the rotating rod is fixedly connected with a fixed sleeve, and the outer part of the rotating rod is movably connected with a movable sleeve, the movable sleeve is below the fixed sleeve, and the upper end of the outer part of the fixed sleeve and the lower end of the outer part of the movable sleeve are fixedly connected with the axial flow stirring paddle.

[0017] In a preferred scheme, the inner wall of the mixing tank is fixedly connected with an annular flow distribution plate, the annular flow distribution plate is provided with a mounting hole, a rotating shaft is rotatably connected in the mounting hole, the outer part of the rotating shaft is fixedly connected with a transmission bevel gear two, and the lower end of the outer part of the fixed sleeve and the upper end of the outer part of the movable sleeve are fixedly connected with a transmission bevel gear one, the teeth of the two transmission bevel gears one can be engaged with the transmission bevel gear two.

[0018] In a preferred scheme, one side of the mixing tank is provided with a fluorine gas cylinder and a nitrogen gas cylinder, the gas outlet ends of the fluorine gas cylinder and the nitrogen gas cylinder are respectively provided with a fluorine gas flow control valve and a nitrogen gas flow control valve, the outlet ends of the fluorine gas flow control valve and the nitrogen gas flow control valve are respectively provided with a fluorine gas inlet pipe and a nitrogen gas inlet pipe, and the end of the fluorine gas inlet pipe away from the fluorine gas flow control valve is connected with the annular pipe above, and the end of the nitrogen gas inlet pipe away from the nitrogen gas flow control valve is connected with the annular pipe below.

[0019] As can be seen from the above, the fluorine-nitrogen gas automatic mixing device for octafluoropropane processing provided by the application realizes double early warning of leakage through the leakage detection module, forms a liquid layer by coating the connection with a large interface with a surfactant solution, realizes double early warning of leakage by combining laser and an electrochemical double sensor, delays the gas leakage speed by bubble wrapping, and ensures the reliability of the sealing detection under the premise of gaining time for emergency disposal and improving operation safety. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The whole structure schematic diagram provided by the application;

[0021] Figure 2 The internal structure schematic diagram of the mixing tank provided by the application;

[0022] Figure 3 The structure schematic diagram of the leakage detection module provided by the application;

[0023] Figure 4 The structure schematic diagram of the sliding table of the leakage detection module provided by the application;

[0024] Figure 5 The internal structure schematic diagram of the sliding table of the leakage detection module provided by the application;

[0025] Figure 6 The structure schematic diagram of the leakage detection module mounting piece and the rotating liquid outlet pipe provided by the application;

[0026] Figure 7 The schematic diagram of the mixed auxiliary module structure provided by the application is shown in the figure.

[0027] Figure 8 The schematic diagram of the mixed auxiliary module fixing sleeve and movable sleeve structure provided by the application is shown in the figure.

[0028] In the figure: 1, support frame; 2, mixing tank; 3, fluorine gas cylinder; 4, nitrogen gas cylinder; 5, leakage detection module; 501, sliding ring frame; 502, transmission tooth ring; 503, sliding table; 504, drive motor; 505, transmission gear; 506, sliding block; 507, rotating liquid outlet pipe; 508, roller coating kit; 509, surfactant storage bottle; 510, electric telescopic rod; 511, sliding rod; 512, mounting piece; 513, fixed plate piece; 514, rotating shaft; 515, guide wheel; 516, pull rope; 517, return spring; 518, electrochemical sensor; 519, laser sensor; 6, mixed auxiliary module; 601, general motor; 602, magnetic coupler; 603, rotating rod; 604, annular current distribution plate; 605, fixed ring frame; 606, annular pipe; 607, nozzle; 608, transmission bevel gear I; 609, movable sleeve; 610, rotating shaft; 611, transmission bevel gear II; 612, axial flow stirring paddle; 613, fixed sleeve; 7, fluorine gas flow control valve; 8, fluorine gas inlet pipe; 9, nitrogen gas flow control valve; 10, nitrogen gas inlet pipe; 11, pressure regulating valve. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application.

[0030] The disclosed fluorine-nitrogen gas automatic mixing device for octafluoropropane processing is mainly applied to the scene that the connection with larger joints is difficult to monitor in real time and stably, and lacks a leakage buffering mechanism when leakage occurs, and the gas will quickly diffuse and enter the working environment without obstruction.

[0031] Reference Figures 1-8 A fluorine-nitrogen gas automatic mixing device for octafluoropropane processing, comprising a support frame 1.

[0032] A mixing tank 2 is fixedly connected to the support frame 1.

[0033] A pressure regulating valve 11 is located below the mixing tank 2, and the pressure regulating valve 11 is in communication with the discharge port of the mixing tank 2.

[0034] The leakage detection module 5 is arranged below the mixing tank 2, and comprises a sliding ring frame 501 fixedly connected to the lower end face of the mixing tank 2. A sliding table 503 is slidably connected to the sliding ring frame 501. A sliding groove is formed in the sliding table 503. A sliding block 506 is slidably connected in the sliding groove. A rotating hole is formed in the sliding block 506. A rotating liquid outlet pipe 507 is rotatably connected in the rotating hole. A plurality of liquid outlet holes are formed in the rotating liquid outlet pipe 507 at equal intervals in the circumferential direction. A roller coating sleeve 508 is arranged at the lower end of the rotating liquid outlet pipe 507. A surfactant storage bottle 509 is arranged above the rotating liquid outlet pipe 507. The surfactant storage bottle 509 is in communication with the rotating liquid outlet pipe 507. The leakage detection module 5 is used for detecting fluorine gas leakage at the connection position of the discharge port.

[0035] The mixing auxiliary module 6 is arranged in the mixing tank 2. The mixing auxiliary module 6 comprises two fixed ring frames 605 fixedly connected to the inner side walls of the mixing tank 2. An annular pipe 606 is fixedly connected to each of the two fixed ring frames 605. A plurality of nozzles 607 are arranged on each of the two annular pipes 606 at equal intervals in the circumferential direction. The mixing auxiliary module 6 is used for uniformly mixing two gases with different densities.

[0036] Referring to Figure 1 , Figure 3 and Figure 4 , the leakage detection module 5 further comprises a transmission gear ring 502 fixedly connected to the upper end face of the sliding ring frame 501. An installation groove is formed in the sliding table 503. A drive motor 504 is fixedly connected in the installation groove. A transmission gear 505 is fixedly connected to the output end of the drive motor 504. The teeth of the transmission gear 505 can be engaged with the transmission gear ring 502.

[0037] Referring to Figure 1 , Figure 4 and Figure 5 , a fixing hole is formed in the sliding table 503. An electric telescopic rod 510 is fixedly connected in the fixing hole. The driving end of the electric telescopic rod 510 is fixedly connected to one side of the sliding block 506.

[0038] Referring to Figure 1 , Figure 5 and Figure 6The sliding table 503 is provided with two sliding slot holes, two sliding rod members 511 are slidingly connected in the two sliding slot holes, the lower ends of the two sliding rod members 511 are fixedly connected with mounting members 512, two fixing holes are formed in the two mounting members 512, an electrochemical sensor 518 is fixedly connected in one of the fixing holes, a laser sensor 519 is fixedly connected in the other fixing hole, the opposite two side outer walls of the sliding block 506 are fixedly connected with pull ropes 516, and the ends of the two pull ropes 516 away from the sliding block 506 are fixedly connected to one side of the corresponding mounting member 512.

[0039] With reference to Figure 1 , Figure 5 and Figure 6 , the inner wall of the sliding table 503 is fixedly connected with two mutually symmetrical fixed plate members 513, circular holes are formed in the two fixed plate members 513, the two pull ropes 516 are located in the corresponding circular holes, the ends of the two pull ropes 516 close to the mounting members 512 are externally surrounded with return springs 517, one end of the two return springs 517 is fixedly connected to the corresponding fixed plate member 513, and the other end is fixedly connected to the corresponding mounting member 512.

[0040] With reference to Figure 1 , Figure 5 and Figure 6 , two movable holes are formed in the sliding table 503, two rotating shafts 514 are rotatably connected in the two movable holes, the outer portions of the two rotating shafts 514 are fixedly connected with guide wheels 515, and the two pull ropes 516 slide on the outer portions of the corresponding guide wheels 515.

[0041] In a specific application scenario, the surfactant solution containing bottle 509 is installed on the rotating outlet pipe 507, the surfactant solution flows out from the outlet hole to soak the roller coating assembly 508, the driving motor 504 is started to rotate the transmission gear 505, through the meshing of the transmission gear 505 and the transmission gear ring 502, the sliding table 503 is driven to slide along the sliding ring frame 501, so that the roller coating assembly 508 is coated on the connection between the outlet of the mixing tank 2 and the pressure regulating valve 11. After the coating is completed, the electric telescopic rod 510 is retracted to drive the sliding block 506 to slide, so that the roller coating assembly 508 is separated from the connection between the outlet of the mixing tank 2 and the pressure regulating valve 11, and at the same time the reset spring 517 is elastically restored to push the two side mounting members 512 and the sliding rod member 511 to slide to the connection, so that the electrochemical sensor 518 and the laser sensor 519 are close to the connection. If a small amount of gas leaks from the connection, it will be wrapped in bubbles due to the reduction of the gas-liquid interfacial tension caused by the surfactant. At this time, the laser sensor 519 can detect the bubbles formed at the connection to give a leakage warning, and the wrapping of the bubbles can slow down the speed of gas diffusion leakage, increase the time for taking remedial measures, and if the gas directly breaks through the liquid layer, the electrochemical sensor 518 senses the fluorine gas composition to give a leakage warning. The liquid layer is formed on the connection with a large coating interface by using the surfactant solution, and the laser and electrochemical dual sensors are combined to realize double early warning of leakage, and the gas leakage speed is delayed by the bubble wrapping, which ensures the reliability of the sealing detection and gains time for emergency disposal to improve the operation safety.

[0042] With reference to Figure 1 , Figure 7 and Figure 8 , the mixing auxiliary module 6 further comprises a general motor 601 fixedly connected to the upper side of the mixing tank 2, and a magnetic coupler 602 is arranged on the top of the mixing tank 2. The driving end of the general motor 601 is fixedly connected to one end of the magnetic coupler 602, and the end of the magnetic coupler 602 away from the general motor 601 is fixedly connected with a rotating rod member 603.

[0043] With reference to Figure 1 , Figure 7 and Figure 8 , the outer side of the rotating rod member 603 is fixedly connected with a fixed sleeve 613, and the outer side of the rotating rod member 603 is movably connected with a movable sleeve 609. The movable sleeve 609 is located below the fixed sleeve 613, and the upper end of the fixed sleeve 613 and the lower end of the movable sleeve 609 are both fixedly connected with an axial flow stirring paddle 612.

[0044] With reference to Figure 1 , Figure 7 and Figure 8The inner wall of the mixing tank 2 is fixedly connected with an annular flow uniformizing plate 604, an installation hole is formed in the annular flow uniformizing plate 604, a rotating shaft 610 is rotatably connected in the installation hole, a transmission bevel gear two 611 is fixedly connected to the outer portion of the rotating shaft 610, and the lower end outer portion of the fixed sleeve 613 and the upper end outer portion of the movable sleeve 609 are both fixedly connected with a transmission bevel gear one 608, and the teeth of the two transmission bevel gears one 608 can be mutually engaged with the transmission bevel gear two 611.

[0045] With reference to Figure 1 and Figure 2 One side of the mixing tank 2 is provided with a fluorine gas storage cylinder 3 and a nitrogen gas storage cylinder 4, the gas outlet ends of the fluorine gas storage cylinder 3 and the nitrogen gas storage cylinder 4 are respectively provided with a fluorine gas flow control valve 7 and a nitrogen gas flow control valve 9, the outlet ends of the fluorine gas flow control valve 7 and the nitrogen gas flow control valve 9 are respectively provided with a fluorine gas inlet pipe 8 and a nitrogen gas inlet pipe 10, and the end of the fluorine gas inlet pipe 8 away from the fluorine gas flow control valve 7 is in communication with the annular pipe 606 located above, and the end of the nitrogen gas inlet pipe 10 away from the nitrogen gas flow control valve 9 is in communication with the annular pipe 606 located below.

[0046] In a specific application scenario, fluorine gas and nitrogen gas are respectively introduced into the corresponding annular pipe 606 through the fluorine gas inlet pipe 8 and the nitrogen gas inlet pipe 10, the fluorine gas with a larger molar mass and density is sprayed from the nozzle 607 located above and gradually diffuses downward, the nitrogen gas with a smaller molar mass and density is sprayed from the nozzle 607 located below and gradually diffuses upward, and the annular flow uniformizing plate 604 further uniformly mixes them, at the same time, the universal motor 601 is started to drive the rotating rod 603 to rotate through the magnetic coupler 602, and then drive the fixed sleeve 613, the shaft flow stirring paddle 612 located thereon and the transmission bevel gear one 608 to rotate, through the mutual engagement of the transmission bevel gear one 608 and the transmission bevel gear two 611, the movable sleeve 609 and the shaft flow stirring paddle 612 located thereon are driven to rotate in opposite directions, the two counter-rotating shaft flow stirring paddles 612 continuously form convection in the interior of the mixing tank 2, which can significantly increase the mixing uniformity; according to the difference in molar mass and density, the gas is injected in different directions, which can promote the natural penetration and mixing of fluorine gas and nitrogen gas, and at the same time, the continuous convection formed by the counter-rotating double shaft flow stirring paddles 612 can significantly improve the mixing uniformity.

[0047] Working principle: open fluorine gas flow control valve 7 and nitrogen gas flow control valve 9, the required amount of fluorine gas and nitrogen gas are respectively introduced into the corresponding annular pipe 606 through fluorine gas inlet pipe 8 and nitrogen gas inlet pipe 10, the fluorine gas with larger molar mass and density is sprayed from the nozzle 607 located at the upper part and gradually diffuses downward, the nitrogen gas with smaller molar mass and density is sprayed from the nozzle 607 located at the lower part and gradually diffuses upward, and the two are further uniformly mixed through the annular flow uniforming plate 604, at the same time, the universal motor 601 is started to drive the rotating rod 603 to rotate through the magnetic coupler 602, and then drive the fixed sleeve 613, the axial flow stirring paddle 612 located on the fixed sleeve 613 and the transmission bevel gear one 608 to rotate, through the meshing of the transmission bevel gear one 608 and the transmission bevel gear two 611, the movable sleeve 609 and the axial flow stirring paddle 612 located on the movable sleeve 609 are driven to rotate in the opposite direction, the two opposite rotating axial flow stirring paddles 612 continuously form convection inside the mixing tank 2, which can significantly increase the mixing uniformity;

[0048] At the same time, the surfactant solution containing surfactant solution bottle 509 is installed on the rotating liquid outlet pipe 507, the surfactant solution flows out from the liquid outlet hole to soak the roller coating sleeve 508, the driving motor 504 is started to rotate the transmission gear 505, through the meshing of the transmission gear 505 and the transmission gear ring 502, the sliding table 503 is driven to slide along the sliding ring frame 501, so that the roller coating sleeve 508 coats the surfactant solution on the connection between the mixing tank 2 outlet and the pressure regulating valve 11, after coating is completed, the electric telescopic rod 510 is retracted to drive the sliding block 506 to slide, so that the roller coating sleeve 508 is separated from the connection between the mixing tank 2 outlet and the pressure regulating valve 11, at the same time, the reset spring 517 is elastically restored to push the two side mounting members 512 and the sliding rod member 511 to slide to the connection, so that the electrochemical sensor 518 and the laser sensor 519 are close to the connection, if a small amount of gas leaks from the connection, it will be wrapped to form bubbles due to the reduction of the gas-liquid interfacial tension caused by the surfactant, at this time, the laser sensor 519 can detect the bubbles formed at the connection to give a leakage warning, and the wrapping of the bubbles can slow down the speed of gas diffusion leakage and increase the time for taking remedial measures, if the gas directly breaks through the liquid layer, the fluorine gas composition is sensed by the electrochemical sensor 518 to give a leakage warning; after the mixing is completed, the pressure regulating valve 11 is opened to stably transport the mixed gas to the downstream.

[0049] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change within the technical range disclosed by the present application according to the technical scheme and the inventive concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. An automatic fluorine and nitrogen gas mixing device for octafluoropropane processing, characterized in that, Including support frame (1); Mixing tank (2), the mixing tank (2) is fixedly connected on support frame (1); Pressure regulating valve (11), the pressure regulating valve (11) is located below mixing tank (2), and the pressure regulating valve (11) is communicated with the discharge port of mixing tank (2); Leak detection module (5), leak detection module (5) is arranged below mixing tank (2), the leak detection module (5) includes sliding ring frame (501), sliding ring frame (501) is fixedly connected to the lower end surface of mixing tank (2), sliding ring frame (501) is slidably connected with sliding table (503), sliding table (503) is provided with sliding groove, sliding block (506) is slidably connected in the sliding groove, rotating hole is opened in sliding block (506), rotating outflow pipe (507) is rotatably connected in the rotating hole, a plurality of liquid outlets are circumferentially equidistantly provided on rotating outflow pipe (507), roller coating kit (508) is arranged on the lower end of rotating outflow pipe (507), surfactant storage bottle (509) is arranged above rotating outflow pipe (507), the liquid outlet of surfactant storage bottle (509) is communicated with rotating outflow pipe (507), and the leak detection module (5) is used for fluorine gas leakage detection on the connecting portion of the discharge port; The leak detection module (5) further includes transmission gear ring (502), transmission gear ring (502) is fixedly connected to the upper end surface of sliding ring frame (501), and the sliding table (503) is provided with mounting groove, and the drive motor (504) is fixedly connected in the mounting groove, the output end of the drive motor (504) is fixedly connected with transmission gear (505), and the teeth of transmission gear (505) can be engaged with transmission gear ring (502); The sliding table (503) is provided with fixing hole, and the electric telescopic rod (510) is fixedly connected in the fixing hole, and the driving end of the electric telescopic rod (510) is fixedly connected to one side of sliding block (506); The sliding table (503) is provided with two sliding slot holes, and the sliding rod (511) is slidably connected in the two sliding slot holes, and the lower end of the two sliding rod (511) is fixedly connected with mounting piece (512), and the two mounting pieces (512) are provided with fastening hole, one of the fastening holes is fixedly connected with electrochemical sensor (518), and the other fastening hole is fixedly connected with laser sensor (519), and the opposite two sides of sliding block (506) are fixedly connected with pull rope (516), and the one end of the two pull ropes (516) away from sliding block (506) is fixedly connected to the one side of corresponding mounting piece (512); The inner wall of the sliding table (503) is fixedly connected with two mutually symmetrical fixed plate members (513), a circular hole is formed in each of the two fixed plate members (513), two pull ropes (516) are located in the corresponding circular holes, and the outer part of the end of each of the two pull ropes (516) near the mounting member (512) is surrounded by a return spring (517), one end of each of the two return springs (517) is fixedly connected to the corresponding fixed plate member (513), and the other end is fixedly connected to the corresponding mounting member (512).

2. The automatic mixing device for octafluoropropane processing fluorine-nitrogen gas according to claim 1, characterized in that, The mixing auxiliary module (6) is located in the interior of the mixing tank (2), the mixing auxiliary module (6) comprises two fixed ring frames (605), the two fixed ring frames (605) are fixedly connected to the inner side wall of the mixing tank (2), each of the two fixed ring frames (605) is fixedly connected with an annular pipe (606), a plurality of nozzles (607) are circumferentially and equidistantly arranged on each of the two annular pipes (606), and the mixing auxiliary module (6) uniformly mixes two gases with different densities.

3. The automatic mixing device for octafluoropropane processing fluorine-nitrogen gas according to claim 2, characterized in that, Two movable holes are formed in the sliding table (503), a rotating shaft (514) is rotatably connected in each of the two movable holes, a guide wheel (515) is fixedly connected to the outer part of each of the two rotating shafts (514), and each of the two pull ropes (516) slides on the outer part of the corresponding guide wheel (515).

4. The automatic mixing device for octafluoropropane processing fluorine-nitrogen gas according to claim 2, characterized in that, The mixing auxiliary module (6) further comprises a universal motor (601), the universal motor (601) is fixedly connected above the mixing tank (2), a magnetic coupler (602) is arranged on the top of the mixing tank (2), the driving end of the universal motor (601) is fixedly connected to one end of the magnetic coupler (602), and the end of the magnetic coupler (602) away from the universal motor (601) is fixedly connected with a rotating rod member (603).

5. The automatic mixing device for octafluoropropane processing fluorine-nitrogen gas according to claim 4, characterized in that, The outer part of the rotating rod member (603) is fixedly connected with a fixed sleeve (613), the outer part of the rotating rod member (603) is movably connected with a movable sleeve (609), the movable sleeve (609) is located below the fixed sleeve (613), and the outer part of the upper end of the fixed sleeve (613) and the outer part of the lower end of the movable sleeve (609) are fixedly connected with an axial flow stirring paddle (612).

6. The automatic mixing device for octafluoropropane processing fluorine-nitrogen gas according to claim 5, characterized in that, The inner wall of the mixing tank (2) is fixedly connected with an annular flow uniformizing plate (604), an installation hole is formed in the annular flow uniformizing plate (604), a rotating shaft (610) is rotatably connected in the installation hole, the outer part of the rotating shaft (610) is fixedly connected with a transmission bevel gear two (611), the outer part of the lower end of the fixed sleeve (613) and the outer part of the upper end of the movable sleeve (609) are fixedly connected with a transmission bevel gear one (608), and the teeth of the two transmission bevel gears one (608) can be meshed with the transmission bevel gear two (611).

7. The automatic mixing device for octafluoropropane processing fluorine-nitrogen gas according to claim 1, characterized in that, One side of the mixing tank (2) is provided with fluorine gas cylinder (3) and nitrogen gas cylinder (4), the fluorine gas cylinder (3) and nitrogen gas cylinder (4) are provided with fluorine gas flow control valve (7) and nitrogen gas flow control valve (9) respectively, the outlet of fluorine gas flow control valve (7) and nitrogen gas flow control valve (9) is provided with fluorine gas inlet pipe (8) and nitrogen gas inlet pipe (10) respectively, and the end of fluorine gas inlet pipe (8) away from fluorine gas flow control valve (7) is communicated with the annular pipe (606) above, and the end of nitrogen gas inlet pipe (10) away from nitrogen gas flow control valve (9) is communicated with the annular pipe (606) below.

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