Device for pushing fluid to stir by using air pressure and use method

Abstract

The invention relates to the technical field of nuclear sewage treatment, in particular to a device for pushing fluid stirring through air pressure and a using method. A device for pushing fluid to be stirred through air pressure comprises a liquid storage tank provided with a first containing space, the first containing space is suitable for containing mixed liquid of at least two different kinds of liquid to be stirred, and the liquid storage tank is provided with a first air port; the barrel is partially inserted into the liquid storage tank, the barrel is provided with a second containing space, and the second containing space is communicated with the first containing space; the stirring assembly comprises a first spiral stirring blade and / or a second spiral stirring blade, the first spiral stirring blade is arranged in the first accommodating space of the cylinder body, and the second spiral stirring blade is arranged on the peripheral surface of the cylinder body; the gas transfer assembly comprises a first gas pipe, a second gas pipe and a gas power transfer part. The invention provides a device for pushing fluid to stir by using air pressure and a use method, and solves the problems of complex mechanical stirring structure and poor sealing performance when high-radioactivity substances are stirred.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear wastewater treatment, and in particular to a device for promoting fluid stirring by utilizing air pressure and a method for using the device. Background Art

[0002] In recent years, with the development of science and technology, the nuclear chemical industry has higher and higher requirements for stirring operations. Traditional stirring devices have been unable to cope with the rapid changes in science and technology, especially the requirements for stirring under special working conditions. In nuclear chemical industry, since the treated sewage often contains highly radioactive substances, high air tightness requirements are required. If mechanical stirring is used, leakage is prone to occur at the shaft seal; the inside of the agitator is not easy to clean; bearings, couplings, and stirring blades are prone to residual highly radioactive nuclear radiation substances; the complex internal structure of mechanical stirring requires frequent maintenance to maintain the normal operation of the stirring equipment; it brings many inconveniences to production and also brings hidden dangers to safety. If air flow stirring is used, since air flow stirring uses gas bubbling through the liquid layer to stir the liquid, or makes the bubble group rise in a dense state, the air rise effect promotes the convection circulation of the liquid. As a result, the air flow stirring output is very small, which greatly limits the types of liquids that can be stirred; at the same time, air flow stirring requires continuous input of gas into the tank from the outside, which also leads to the generation of new gas pollutants. Summary of the invention

[0003] In view of this, the present invention provides a device and a method for using air pressure to promote fluid stirring, so as to solve the problem that when stirring highly radioactive substances, conventional mechanical stirring has poor sealing and high difficulty in maintenance after long-term use due to its complex structure.

[0004] In a first aspect, the present invention provides a device for stirring a fluid using air pressure, comprising:

[0005] A liquid storage tank, wherein the liquid storage tank has a first accommodating space, wherein the first accommodating space is suitable for accommodating a mixture of different types of liquids to be stirred, and the liquid storage tank is provided with a first air port, wherein the height of the first air port is higher than the liquid level of the liquid to be stirred;

[0006] A cylinder, wherein the cylinder is partially inserted into the liquid storage tank, the cylinder has a second accommodating space, the second accommodating space is communicated with the first accommodating space, the second accommodating space is suitable for accommodating the mixed liquid, and a second air port is provided on the cylinder wall of the cylinder exposed from the liquid storage tank;

[0007] A stirring assembly, the stirring assembly comprising a first spiral stirring blade and / or a second spiral stirring blade, the first spiral stirring blade being arranged in the first accommodating space of the cylinder, and the second spiral stirring blade being arranged on the outer peripheral surface of the cylinder;

[0008] A gas transfer component, the gas transfer component includes a first gas pipe, a second gas pipe and a gas power transfer member, the first gas pipe connects the gas power transfer member and the first gas port, and the second gas pipe connects the gas power transfer member and the second gas port.

[0009] During the whole process, the first spiral stirring blade and the second spiral stirring blade remain stationary, and the liquid to be stirred is only pushed to move by gas. The mixed liquid is pushed to mix by changing the pressure difference between the first and second containing spaces, so that different types of liquid to be stirred move after passing through the first spiral stirring blade and / or the second spiral stirring blade. Since the first and second spiral stirring blades are stationary, the sealing of the device is kept good, and the internal gas only reciprocates in the cylinder and the liquid storage tank, and will not flow into the air. The part of the device that contacts the highly radioactive liquid does not require a coupling, bearing, or other complex structure, and has the advantages of simple structure, high sealing, and easy installation after dismantling and maintenance. In addition, the radioactive substances contained in the fluid will only contact the static parts and will not flow into the gas-powered transfer parts, so there will be no safety hazards, and it can also have good sealing.

[0010] In an optional embodiment, the rotation direction of the first spiral stirring blade and the rotation direction of the second spiral stirring blade are opposite.

[0011] In an optional embodiment, the central axis of the liquid storage tank and the central axis of the cylinder are arranged to coincide with each other.

[0012] In an optional embodiment, a flat head is provided on the top of the cylinder, and a central tube is also provided in the cylinder. A first spiral stirring blade is fixed to the outer circumference of the central tube, and one end of the central tube is fixedly connected to the flat head.

[0013] In an optional embodiment, a pull rod and a distance tube are also provided in the cylinder, the pull rod passes through the distance tube, one end of the pull rod is fixedly connected to the flat head, the distance tube passes through the blade of the first spiral stirring blade, and the end of the pull rod facing away from the flat head is sleeved on the limit block.

[0014] In an optional embodiment, the blade edge of the first spiral stirring blade is disposed in contact with the inner wall of the cylinder, and the blade edge of the second spiral stirring blade is disposed in contact with the inner wall of the liquid storage tank.

[0015] In an optional embodiment, a remote liquid level gauge port is provided on the cylinder wall of the cylinder body exposed from the liquid storage tank, and a liquid level sensor is provided in the remote liquid level gauge port.

[0016] In an optional implementation, a first regulating valve is provided on the first air pipe, and a second regulating valve is provided on the second air pipe.

[0017] In an optional embodiment, a third air pipe and a fourth air pipe are further included, wherein the third air pipe is respectively connected to the first air pipe and the gas power transfer component, and the connection between the third air pipe and the first air pipe is located between the first air port and the first regulating valve; the fourth air pipe is respectively connected to the second air pipe and the gas power transfer component, and the connection between the fourth air pipe and the second air pipe is located between the second air port and the second regulating valve.

[0018] In a second aspect, the present invention further provides a method for using a device for promoting fluid stirring by using air pressure, comprising:

[0019] The gas power transfer member extracts gas in the first accommodation space through the first gas pipe, and fills the second accommodation space with gas through the second gas pipe. The liquid to be stirred moves along the first spiral stirring blade and / or the second spiral stirring blade under the force of the gas, so that different types of liquids to be stirred are fully mixed;

[0020] Alternatively, the gas power transfer component extracts gas from the second containing space through the second air pipe, and inflates the first containing space through the first air pipe. The liquid to be stirred is affected by the force of the gas and moves along the first spiral stirring blade and / or the second spiral stirring blade, so that different types of liquids to be stirred are fully mixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of a device for stirring a fluid using air pressure according to an embodiment of the present invention.

[0023] Description of the reference numerals: 1. liquid storage tank; 101. first storage space; 102. first air port; 103. liquid inlet; 104. liquid outlet; 105. liquid inlet valve; 106. liquid outlet valve; 2. cylinder; 201. flat end cap; 202. second air port; 203. remote level gauge port; 204. second storage space; 3. stirring assembly; 301. first spiral stirring blade; 302. second spiral stirring blade; 303. middle Core tube; 304, fixed distance tube; 305, pull rod; 306, limit block; 307, fixed rod; 4, gas transfer assembly; 401, first air pipe; 402, second air pipe; 403, third air pipe; 404, fourth air pipe; 405, first regulating valve; 406, second regulating valve; 407, third regulating valve; 408, fourth regulating valve; 409, gas power transfer member; 410, electrostatic precipitator; 5, liquid to be stirred. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0025] Combine the following Figure 1 , describing an embodiment of the present invention.

[0026] According to an embodiment of the present invention, on the one hand, a device for stirring a fluid by using air pressure is provided, comprising: a liquid storage tank 1, the liquid storage tank 1 having a first accommodating space 101, the first accommodating space 101 being suitable for accommodating a mixture of at least two different types of liquids 5 to be stirred, the liquid storage tank 1 being provided with a first air port 102, the height of the first air port 102 being higher than the liquid level of the liquid 5 to be stirred;

[0027] The barrel 2 is partially inserted into the liquid storage tank 1. The barrel 2 has a second accommodating space 204. The second accommodating space 204 is communicated with the first accommodating space 101. The second accommodating space 204 is suitable for accommodating the mixed liquid. The barrel wall of the barrel 2 exposed from the liquid storage tank 1 is provided with a second gas port 202.

[0028] The stirring assembly 3 includes a first spiral stirring blade 301 and a second spiral stirring blade 302, wherein the first spiral stirring blade 301 is disposed in the first accommodation space 101 of the cylinder 2, and the second spiral stirring blade 302 is disposed on the outer peripheral surface of the cylinder 2;

[0029] The gas transfer assembly 4 includes a first gas pipe 401 , a second gas pipe 402 and a gas power transfer member 409 . The first gas pipe 401 connects the gas power transfer member 409 and the first gas port 102 , and the second gas pipe 402 connects the gas power transfer member 409 and the second gas port 202 .

[0030] Through the above arrangement, the gas power transfer member 409 extracts the gas in the first accommodation space 101 through the first gas pipe 401, and fills the second accommodation space 204 with gas through the second gas pipe 402. The liquid 5 to be stirred moves along the first spiral stirring blade 301 and the second spiral stirring blade 302 under the force of the gas, so that different types of liquids 5 to be stirred are fully mixed.

[0031] Alternatively, the gas power transfer component 409 extracts gas from the second containing space 204 through the second air pipe 402, and inflates the first containing space 101 through the first air pipe 401. The liquid 5 to be stirred is subjected to the force of the gas and moves along the first spiral stirring blade 301 and the second spiral stirring blade 302, so that different types of liquids 5 to be stirred are fully mixed to obtain a uniform mixed liquid.

[0032] During the whole process, the first spiral stirring blade 301 and the second spiral stirring blade 302 remain stationary, and the liquid to be stirred is only pushed to move by gas. The pressure difference between the first receiving space and the second receiving space is changed to push the mixed liquid to mix and move, so that different types of liquid to be stirred move after passing through the first spiral stirring blade 301 and the second spiral stirring blade 302. Since the first spiral stirring blade 301 and the second spiral stirring blade 302 are stationary, the sealing performance of the device is kept good, and the internal gas only reciprocates in the cylinder 2 and the liquid storage tank 1, and will not flow into the air. The part of the device that contacts the highly radioactive liquid does not require a coupling, a bearing, and other complex structures, and has the advantages of simple structure, high sealing performance, and easy installation after dismantling and maintenance. In addition, the radioactive substances contained in the fluid will only contact the static parts and will not flow into the gas-powered transfer part 409, so there will be no safety hazards, and it can also have good sealing performance.

[0033] In one embodiment, Figure 1 As shown, the rotation direction of the first spiral stirring blade 301 and the rotation direction of the second spiral stirring blade 302 are opposite.

[0034] In this embodiment, after the liquid 5 to be stirred passes through the first spiral stirring blade 301 and the second spiral stirring blade 302 in opposite spiral directions inside and outside the cylinder 2, horizontal and vertical convection will be formed in the liquid 5 to be stirred, thereby generating turbulent vortices. These vortices often collide and break with each other, causing the liquid to be violently stirred, so the turbulent diffusion degree of the stirred liquid is high. It should be noted that the liquid 5 to be stirred in this application refers to a liquid containing highly radioactive substances.

[0035] In one embodiment, Figure 1 As shown, the central axis of the liquid storage tank 1 and the central axis of the cylinder 2 are arranged to overlap, so as to avoid the problem of shaking of the liquid storage tank 1 due to the misalignment of the central axes of the liquid storage tank 1 and the cylinder 2 when the liquid 5 to be stirred flows in the liquid storage tank 1.

[0036] In one embodiment, Figure 1 As shown, a flat head 201 is provided on the top of the cylinder 2 , and a central tube 303 is also provided inside the cylinder 2 . A first spiral stirring blade 301 is fixed to the outer circumference of the central tube 303 , and one end of the central tube 303 is fixedly connected to the flat head 201 .

[0037] In this embodiment, the first spiral stirring blade 301 is fixed by the central tube 303, and the flat head 201 is provided to make the whole device sealed to avoid gas leakage. Figure 1 As shown, the bottom of the cylinder 2 extending into the liquid storage tank 1 is opened, and the end of the center rod away from the flat head 201 is fixedly connected to the cylinder 2 through a fixing rod 307 to fix the center rod, and the center axis of the center rod coincides with the center axis of the cylinder 2.

[0038] In one embodiment, Figure 1 As shown, a pull rod 305 and a distance tube 304 are also provided in the cylinder 2. The pull rod 305 passes through the distance tube 304. One end of the pull rod 305 is fixedly connected to the flat head 201. The distance tube 304 passes through the blade of the first spiral stirring blade 301. The end of the pull rod 305 facing away from the flat head 201 is sleeved on the limit block 306.

[0039] In this embodiment, the first spiral stirring blade 301 is fixed by the distance tube 304, and the first spiral stirring blade 301 is further fixed by the cooperation of the pull rod 305 and the distance tube 304, and the movement of the distance tube 304 in the length direction is limited by the limit block 306. Specifically, the limit block 306 is a nut. It should be noted that the pull rod 305 and the distance tube 304 are set in a one-to-one correspondence, and the number of the pull rods 305 is at least eight. Figure 1As shown, in this embodiment, four first spiral stirring blades form an annular stirring blade surrounding the cylinder, and each first spiral stirring blade needs to have three support points, the central tube provides one support point, and the other two support points are provided by two pull rods 305 respectively, and the number of pull rods 305 is calculated to be at least eight.

[0040] In one embodiment, Figure 1 As shown, the blade edge of the first spiral stirring blade 301 is fitted against the inner wall of the cylinder 2, and the blade edge of the second spiral stirring blade 302 is fitted against the inner wall of the liquid storage tank 1 to avoid stirring dead corners and ensure that the liquid 5 to be stirred passes through the spiral stirring blades.

[0041] In one embodiment, Figure 1 As shown, a remote level gauge port 203 is provided on the wall of the cylinder 2 exposed from the liquid storage tank 1 , and a liquid level sensor is provided in the remote level gauge port 203 , and the liquid position in the cylinder 2 is sensed by the liquid level sensor.

[0042] In one embodiment, Figure 1 As shown, a first regulating valve 405 is provided on the first air pipe 401 , and a second regulating valve 406 is provided on the second air pipe 402 . The first regulating valve 405 is used to regulate the gas flow in the first air pipe 401 , and the second regulating valve 406 is used to regulate the gas flow in the second air pipe 402 .

[0043] In one embodiment, Figure 1 As shown, the third air pipe 403 and the fourth air pipe 404 are also included. The third air pipe 403 is connected to the first air pipe 401 and the gas power transfer member 409 respectively. The connection between the third air pipe 403 and the first air pipe 401 is located between the first air port 102 and the first regulating valve 405, and the connection is connected through a three-way connection. The fourth air pipe 404 is connected to the second air pipe 402 and the gas power transfer member 409 respectively. The connection between the fourth air pipe 404 and the second air pipe 402 is located between the second air port 202 and the second regulating valve 406, and the connection is connected through a three-way connection. The gas flow in the third air pipe 403 is adjusted by the third regulating valve 407, and the gas flow in the fourth air pipe 404 is adjusted by the fourth regulating valve 408.

[0044] In one embodiment, Figure 1 As shown, an electrostatic precipitator 410 is respectively provided at the first air pipe 401 near the first air port 102 and at the second air pipe 402 near the second air port 202 , and the electrostatic precipitator 410 is used to purify the radioactive particles carried by the gas flowing out of the liquid storage tank 1 or the cylinder 2 .

[0045] In one embodiment, Figure 1As shown, the top of the liquid storage tank 1 is also provided with a liquid inlet 103, the liquid inlet 103 is connected to a liquid inlet pipe, and the liquid inlet pipe is provided with a liquid inlet valve 105; the bottom of the liquid storage tank 1 is also provided with a liquid outlet 104, the liquid outlet 104 is connected to a liquid outlet pipe, and the liquid outlet pipe is provided with a liquid outlet valve 106. Specifically, the liquid inlet valve 105 and the liquid outlet valve 106 are both electromagnetic valves.

[0046] In order to realize automatic control, a controller is also included, which is respectively connected to the liquid level sensor, the first regulating valve 405, the second regulating valve 406, the third regulating valve 407, the fourth regulating valve 408, the liquid inlet valve 105, the liquid outlet valve 106 and the gas power transfer component 409.

[0047] A method for using a device for stirring a fluid using air pressure comprises the following steps:

[0048] 1) Open the liquid inlet valve 105, and introduce at least two different types of liquids 5 to be stirred into the liquid inlet port 103 through the liquid inlet pipe. When the liquid storage tank 1 is filled, close the liquid inlet valve 105 and the liquid outlet valve 106, close the first regulating valve 405 and the third regulating valve 407, open the second regulating valve 406, the fourth regulating valve 408 and the gas power transfer member 409, and the gas in the cylinder 2 is transferred to the liquid storage tank 1 by the gas transfer power member. The liquid level of the liquid 5 to be stirred in the cylinder 2 rises, and the liquid level in the liquid storage tank 1 drops. When the liquid level rises to a preset position, the liquid level sensor sends a signal to the controller, and the second regulating valve 406, the fourth regulating valve 408 and the gas power transfer member 409 are closed at the same time;

[0049] 2) The second regulating valve 406 and the fourth regulating valve 408 are closed, and the first regulating valve 405, the third regulating valve 407 and the gas-powered transfer member 409 are opened. The gas in the liquid storage tank 1 is transferred to the cylinder 2 by the gas-powered transfer member. The liquid level of the liquid to be stirred 5 in the cylinder 2 drops, and the liquid level in the liquid storage tank 1 rises. When the liquid level drops to a preset position, the liquid level sensor sends a signal to the controller, and the first regulating valve 405, the third regulating valve 407 and the gas-powered transfer member 409 are closed at the same time;

[0050] 3) Repeat steps 1) and 2) until the stirring effect reaches the desired level. After the mixture is evenly mixed, open the liquid outlet valve 106 to allow the evenly mixed mixture to flow out of the liquid storage tank 1 along the liquid outlet pipe.

[0051] The device for stirring fluid by using air pressure provided by the present invention has the following advantages: (1) In the whole device, the first spiral stirring blade 301 and the second spiral stirring blade 302 will remain stationary, with few assembly components, simple structure, no complex structure, no need for high assembly precision, good airtightness of the fully welded structure, high-pressure working conditions can avoid high-pressure dynamic seals, no moving parts during operation, no internal energy consumption caused by wear, and greatly reduced manufacturing costs and operation and maintenance costs; (2) Compared with the problem of stirring dead zones in the tank that is prone to occur in traditional mechanical stirring, the blade edge of the first spiral stirring blade 301 of the present application is arranged in affixed with the inner wall of the cylinder 2, and the blade edge of the second spiral stirring blade 302 is arranged in affixed with the inner wall of the liquid storage tank 1, relying on the pressure difference of air pressure to drive the liquid 5 to be stirred to flow in a spiral. The liquid 5 to be stirred is subject to the dual effects of air pressure and its own gravity. Only when one layer is filled can it flow into the next layer, which can avoid the dead zone in the liquid storage tank 1 and make the fluid in the liquid storage tank 1 move and circulate; (3) The present application uses gas as a power source, and no electric sparks will be generated during operation. It has natural explosion-proof characteristics. There are no moving parts in the liquid storage tank 1. It is not affected by vibration, high temperature, electromagnetic, radiation, etc. It is suitable for harsh working environments and can work normally under adverse conditions such as high temperature, vibration, humidity, dust, etc.; (4) The internal cross-sectional area of ​​the cylinder 2 of the present application is large, and the circulating volume flow rate of the liquid 5 to be stirred in the cylinder 2 is large. Under the action of air pressure, the fluid to be stirred outside the cylinder 2 produces a continuous spiral flow opposite to the internal rotation direction. After the liquid 5 to be stirred passes through two spiral stirring blades with opposite spiral directions inside and outside the cylinder 2, horizontal and vertical convection will be formed in the liquid 5 to be stirred, thereby generating turbulent vortices. These vortices often collide and break with each other, causing the liquid to be violently stirred. Therefore, the turbulent diffusion degree of the liquid after stirring is high, which can simultaneously cause a large circulation flow rate and a high turbulence degree (while the circulation flow rate and turbulence degree of the traditional mechanical stirring device are affected by the size of the stirring blade diameter and the speed of the stirring blade. Under the condition of certain power, the two also have opposite changes, making it difficult to achieve both a high circulation flow rate and a high turbulence intensity).

[0052] As an alternative embodiment, a first spiral stirring blade 301 is provided in the first accommodating space 101 of the cylinder 2, and a second spiral stirring blade 302 is not provided on the outer circumferential surface of the cylinder 2; or, the first spiral stirring blade 301 is not provided in the first accommodating space 101 of the cylinder 2, and a second spiral stirring blade 302 is provided on the outer circumferential surface of the cylinder 2.

[0053] As an alternative implementation, the gas power transfer element 409 may also be a gas pump such as a vacuum pump.

[0054] As an alternative embodiment, if two first spiral stirring blades are used to form an annular stirring blade surrounding the cylinder, at least four pull rods 305 are required; if three first spiral stirring blades are used to form an annular stirring blade surrounding the cylinder, at least six pull rods 305 are required; if five first spiral stirring blades are used to form an annular stirring blade surrounding the cylinder, at least ten pull rods 305 are required, and so on.

[0055] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A device for stirring a fluid using air pressure, characterized in that: include: A liquid storage tank (1), the liquid storage tank (1) having a first accommodating space (101), the first accommodating space (101) being suitable for accommodating a mixture of at least two different types of liquids to be stirred (5), the liquid storage tank (1) being provided with a first air port (102), the height of the first air port (102) being higher than the liquid level of the liquid to be stirred (5); A cylinder (2), wherein the cylinder (2) is partially inserted into the liquid storage tank (1), the cylinder (2) having a second accommodating space (204), the second accommodating space (204) being in communication with the first accommodating space (101), the second accommodating space (204) being suitable for accommodating a mixed liquid, and a second air port (202) being provided on the cylinder wall of the cylinder (2) exposed from the liquid storage tank (1); A stirring assembly (3), the stirring assembly (3) comprising a first spiral stirring blade (301) and / or a second spiral stirring blade (302), the first spiral stirring blade (301) being arranged in a first accommodating space (101) of the cylinder (2), and the second spiral stirring blade (302) being arranged on the outer peripheral surface of the cylinder (2); A gas transfer component (4), the gas transfer component (4) comprising a first gas pipe (401), a second gas pipe (402) and a gas power transfer member (409), the first gas pipe (401) connecting the gas power transfer member (409) and the first gas port (102), the second gas pipe (402) connecting the gas power transfer member (409) and the second gas port (202).

2. The device for stirring fluid by using air pressure according to claim 1, characterized in that: The rotation direction of the first spiral stirring blade (301) and the rotation direction of the second spiral stirring blade (302) are arranged opposite to each other.

3. The device for stirring fluid by using air pressure according to claim 1, characterized in that: The central axis of the liquid storage tank (1) and the central axis of the cylinder (2) are arranged to coincide with each other.

4. The device for stirring fluid by using air pressure according to claim 2, characterized in that: A flat head (201) is provided on the top of the cylinder (2), and a central tube (303) is also provided inside the cylinder (2). A first spiral stirring blade (301) is fixed to the outer peripheral surface of the central tube (303), and one end of the central tube (303) is fixedly connected to the flat head (201).

5. The device for stirring fluid by using air pressure according to claim 4, characterized in that: A pull rod (305) and a distance tube (304) are also provided in the cylinder (2); the pull rod (305) is arranged through the distance tube (304); one end of the pull rod (305) is fixedly connected to the flat head (201); the distance tube (304) is arranged through the blade of the first spiral stirring blade (301); and one end of the pull rod (305) facing away from the flat head (201) is sleeved on the limit block (306).

6. The device for stirring fluid by using air pressure according to claim 1, characterized in that: The blade edge of the first spiral stirring blade (301) is arranged to fit the inner wall of the cylinder (2), and the blade edge of the second spiral stirring blade (302) is arranged to fit the inner wall of the liquid storage tank (1).

7. The device for stirring fluid by using air pressure according to claim 1, characterized in that: A remote liquid level gauge port (203) is provided on the cylinder wall of the cylinder body (2) exposed from the liquid storage tank (1), and a liquid level sensor is provided in the remote liquid level gauge port (203).

8. The device for stirring fluid by using air pressure according to claim 1, characterized in that: The first air pipe (401) is provided with a first regulating valve (405), and the second air pipe (402) is provided with a second regulating valve (406).

9. The device for stirring fluid by using air pressure according to claim 8, characterized in that: The invention also includes a third air pipe (403) and a fourth air pipe (404), wherein the third air pipe (403) is connected to the first air pipe (401) and the gas power transfer member (409) respectively, and the connection between the third air pipe (403) and the first air pipe (401) is located between the first air port (102) and the first regulating valve (405); and the fourth air pipe (404) is connected to the second air pipe (402) and the gas power transfer member (409) respectively, and the connection between the fourth air pipe (404) and the second air pipe (402) is located between the second air port (202) and the second regulating valve (406).

10. A method for using a device for stirring a fluid using air pressure, for using the device for stirring a fluid using air pressure as claimed in claim 1, characterized in that: include: The gas power transfer member (409) extracts gas from the first accommodation space (101) through the first gas pipe (401) and fills the second accommodation space (204) with gas through the second gas pipe (402). The liquid to be stirred (5) is moved along the first spiral stirring blade (301) and / or the second spiral stirring blade (302) by the force of the gas, so that different types of liquids to be stirred (5) are fully mixed. Alternatively, the gas power transfer element (409) extracts gas from the second containing space (204) through the second gas pipe (402), and inflates the first containing space (101) through the first gas pipe (401), and the liquid to be stirred (5) is moved along the first spiral stirring blade (301) and / or the second spiral stirring blade (302) by the force of the gas, so that different types of liquids to be stirred (5) are fully mixed.

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