Gas-liquid mixed phase self-adaptive negative pressure valve and self-adaptive method thereof

Abstract

The invention discloses a gas-liquid mixed phase self-adaptive negative pressure valve and a self-adaptive method thereof, and belongs to the technical field of valves. A gas-liquid mixed phase self-adaptive negative pressure valve comprises a valve body, a fixed valve plate and a movable valve plate are arranged in the valve body, the movable valve plate is located below the fixed valve plate and connected with the fixed valve plate in a sliding mode, the fixed valve plate is connected through a valve column, the upper portion of the valve body and the fixed valve plate define an upper pressure cavity, and the bottom of the valve body and the movable valve plate define a lower pressure cavity. A gas channel is arranged between the fixed valve plate and the valve column, a bypass channel enabling liquid to flow is arranged between the upper pressing cavity and the lower pressing cavity, and the upper pressing cavity and the lower pressing cavity are communicated through the gas channel and the bypass channel. A pre-tightening structure for applying upward thrust to the movable valve plate is arranged in the valve body, and the movable valve plate and the fixed valve plate are kept to be attached in a sealed mode under the normal state of the pre-tightening structure. By the adoption of the gas-liquid mixed phase self-adaptive negative pressure valve and the self-adaptive method thereof, the problems that an existing negative pressure valve is prone to being blocked, and the pressure difference regulation and control capacity is insufficient can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a gas-liquid mixed phase adaptive negative pressure valve and an adaptive method thereof. BACKGROUND

[0002] In actual working conditions such as slope protection engineering, chemical production and environmental protection treatment, there is often a need to pump and discharge two-phase medium mixed with gas and liquid under negative pressure. For example, in slope soil reinforcement and drainage operation, air and groundwater exist in soil pores at the same time, and a negative pressure device is needed to guide the gas-liquid mixed medium out to ensure the stability of the slope; in the tail gas treatment system of chemical reaction, the tail gas often carries condensed liquid droplets to form a gas-liquid mixed phase, and a negative pressure valve is needed to realize the orderly discharge of the medium; in a small-scale waste liquid and waste gas integrated treatment equipment, a negative pressure valve is also needed to complete the directional transportation and pressure regulation of the gas-liquid mixed medium.

[0003] To meet the above-mentioned negative pressure working condition requirements, conventional negative pressure valves are often used to control the medium in the traditional technology, but such valves are generally designed for single-phase medium (pure gas or pure liquid). When dealing with gas-liquid mixed phase medium, many technical defects are gradually exposed: Poor medium adaptability: the traditional negative pressure valve does not optimize the structure according to the physical property differences of the gas-liquid two-phase medium. When the gas-liquid mixed medium enters the valve cavity, the small channel through which the gas can pass is easily blocked by the liquid, and the large flow channel required by the liquid will cause negative pressure leakage when only gas passes through, which cannot simultaneously meet the efficient flow of gas-liquid two-phase medium and the negative pressure pressure maintaining requirement.

[0004] Insufficient differential pressure regulation capacity: the opening and closing threshold of the traditional negative pressure valve is mostly a fixed value, and the elastic force of its pre-tightening structure cannot be self-adaptively adjusted according to the viscosity and pressure difference changes caused by the switching of gas-liquid medium. When the medium changes from gas to liquid, due to the fact that the viscosity of liquid is much greater than that of gas, the pressure difference between the upper and lower pressure chambers in the valve cavity will change sharply. The valve with a fixed threshold value either cannot open in time to discharge the liquid, causing the pressure overload in the valve, or opens too early, causing the negative pressure environment to fail, making it difficult to maintain a stable negative pressure working state. SUMMARY

[0005] The purpose of the present application is to provide a gas-liquid mixed phase adaptive negative pressure valve and an adaptive method thereof, which solves the problems of easy blockage and insufficient differential pressure regulation capacity of the existing negative pressure valve.

[0006] To achieve the above object, the application provides a gas-liquid mixed phase adaptive negative pressure valve, which comprises a valve body, an opening for gas and liquid to enter the valve body arranged at the top of the valve body, and an external connecting nozzle for gas and liquid to exit the valve body arranged at the bottom of the valve body; a fixed valve plate and a movable valve plate are arranged in the valve body, the movable valve plate is located below the fixed valve plate and is in sliding connection with the fixed valve plate, the movable valve plate and the fixed valve plate are connected through a valve column, an upper compression chamber is formed by the upper part of the valve body and the fixed valve plate, a lower compression chamber is formed by the bottom of the valve body and the movable valve plate, the lower compression chamber is in communication with the external connecting nozzle, a gas passage is arranged between the fixed valve plate and the valve column, the upper compression chamber and the lower compression chamber are in communication through the gas passage, and the lower compression chamber normally maintains negative pressure; a bypass passage for liquid flow is arranged between the upper compression chamber and the lower compression chamber, and the liquid is discharged from the upper compression chamber into the lower compression chamber through the bypass passage; a pre-tightening structure for applying an upward thrust to the movable valve plate is arranged in the valve body, and the pre-tightening structure normally maintains the sealing fit of the movable valve plate and the fixed valve plate.

[0007] Preferably, a conduit protruding upward is arranged at the center of the fixed valve plate, the top end of the valve column is located in the conduit, and the gas passage is formed between the inside of the conduit and the valve column; a gas passage hole is arranged on the movable valve plate to enable gas to enter the lower compression chamber through the movable valve plate, and the gas passage hole is in communication with the gas passage.

[0008] Preferably, a plurality of first bypass openings are uniformly arranged on the fixed valve plate, a plurality of second bypass openings are uniformly arranged on the movable valve plate, the projections of the first bypass openings and the second bypass openings on the same horizontal plane do not overlap, and the first bypass openings and the second bypass openings form the bypass passage for connecting the upper compression chamber and the lower compression chamber.

[0009] Preferably, the first bypass openings and the second bypass openings are arranged at intervals.

[0010] Preferably, the upper surface of the fixed valve plate, the outer surface of the conduit, and the inner surface of the valve body form a liquid storage groove for storing liquid, the outer surface of the fixed valve plate is provided with external threads, the inner surface of the valve body is provided with internal threads matched with the external threads of the fixed valve plate, and the fixed valve plate and the valve body are connected through the threads.

[0011] Preferably, the upper surface of the movable valve plate is a conical structure gradually concave downward from the edge to the center, a sleeve is arranged at the center of the movable valve plate, the valve column is located in the sleeve, the sleeve is provided with internal threads, the lower part of the valve column is provided with external threads matched with the internal threads of the sleeve, and the valve column is connected with the sleeve through the threads.

[0012] Preferably, a spiral groove is arranged at the upper part of the valve column, a spiral passage is formed between the spiral groove and the inner wall of the conduit, and the gas passage is in communication with the lower compression chamber through the spiral passage and the gas passage hole.

[0013] Preferably, the fixed valve plate is provided with a plurality of limiting blocks arranged along the axial direction of the fixed valve plate on the side wall close to the movable valve plate, and the movable valve plate is provided with limiting grooves matched with the limiting blocks, the limiting blocks are located in the limiting grooves and are in sliding connection with the limiting grooves.

[0014] Preferably, the pre-tightening structure comprises a spring, and the bottom inner surface of the valve body is provided with a locating block for locating the spring, and the top end of the spring is connected with the lower surface of the movable valve plate.

[0015] Based on the adaptive method of the gas-liquid mixed phase adaptive negative pressure valve, the adaptive method comprises the following steps: S1, the external connection nozzle is connected with the external gas pump through the connecting pipe, the gas pump provides a negative pressure environment for the lower pressure cavity through the connecting pipe and the external connection nozzle, and the movable valve plate is sealed and combined with the lower surface of the fixed valve plate under the action of the spring; S2, there is a pressure difference between the upper pressure cavity and the lower pressure cavity, the gas in the upper pressure cavity enters the lower pressure cavity through the gas passage, the spiral passage in the pipe and the vent hole, and the gas is discharged from the valve body through the external connection nozzle; S3, the liquid in the upper pressure cavity is first stored in the liquid storage groove, when the liquid flows over the gas passage on the pipe, the liquid occupies the gas passage and flows to the lower pressure cavity, because the viscosity of the liquid is much greater than that of the gas, a larger air pressure difference is generated between the upper pressure cavity and the lower pressure cavity, as the air pressure difference increases, when the air pressure difference exceeds the pre-tightening force of the spring, the air pressure pushes the movable valve plate to move away from the fixed valve plate, the first bypass opening and the second bypass opening are communicated, the liquid in the upper pressure cavity enters the lower pressure cavity through the first bypass opening and the second bypass opening, and is discharged from the valve body through the external connection nozzle; S4, after the liquid in the upper pressure cavity is discharged, the air pressure difference between the upper pressure cavity and the lower pressure cavity decreases and gradually balances, the spring pushes the movable valve plate to move towards the fixed valve plate, the movable valve plate is recombined with the fixed valve plate to seal, the bypass passage is closed, and the valve body returns to the normal state.

[0016] The gas-liquid mixed phase adaptive negative pressure valve and the adaptive method thereof have the following advantages and positive effects: 1. The negative pressure valve is provided with a gas passage and a bypass passage, the gas mainly flows between the upper pressure cavity and the lower pressure cavity through the gas passage, and the liquid mainly flows between the upper pressure cavity and the lower pressure cavity through the bypass passage; when the liquid enters the gas passage, the bypass passage is automatically opened due to the increase of the pressure difference, the automatic shunting of the gas and the liquid is realized, the problems of liquid resistance, fluctuation and backflow caused by the liquid entering the negative pressure pipeline are avoided, the pressure difference between the upper cavity and the lower cavity is always kept stable, and the continuity and safety of the air pressure system are ensured.

[0017] 2. The fixed valve plate and the valve body, and the movable valve body and the valve column are connected by threads, so that the pre-tightening force of the movable valve body and the stable air pressure difference of the upper cavity and the lower cavity can be adjusted, and the use is convenient.

[0018] 3、 The negative pressure valve has simple structure, low cost, high reliability and convenient maintenance.

[0019] The technical solutions of the present application are described in further detail below with reference to the accompanying drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The figure is a schematic diagram of the cross-sectional structure of an embodiment of the present application. Figure 2 The figure is a schematic diagram of the explosive structure of an embodiment of the present application. Figure 3 The figure is a schematic diagram of the three-dimensional structure of an embodiment of the present application. Figure 4 The figure is a schematic diagram of the valve body structure of an embodiment of the present application. Figure 5 The figure is a schematic diagram of the three-dimensional structure of the fixed valve plate of an embodiment of the present application. Figure 6 The figure is a schematic diagram of the bottom structure of the fixed valve plate of an embodiment of the present application. Figure 7 The figure is a schematic diagram of the top view structure of the fixed valve plate of an embodiment of the present application. Figure 8 The figure is a schematic diagram of the three-dimensional structure of the moving valve plate of an embodiment of the present application.

[0021] REFERENCE NUMERALS 1, valve body; 2, fixed valve plate; 3, moving valve plate; 4, valve post; 5, spring; 6, external nozzle; 7, positioning platform; 8, guide pipe; 9, first bypass opening; 10, liquid storage groove; 11, limiting platform; 12, sleeve; 13, second bypass opening; 14, limiting groove; 15, air vent; 100, upper compression chamber; 200, lower compression chamber; 300, gas passage; 400, bypass passage. DETAILED DESCRIPTION

[0022] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be connected internally between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] In the present application, 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. If there is a conflict between the definitions in the present specification and those in the prior art, the definitions in the present specification are intended to prevail. In addition, the terms used herein are merely for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0024] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0025] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 A gas-liquid mixed phase adaptive negative pressure valve includes a valve body 1, the top of the valve body 1 is provided with an opening for gas and liquid to enter the valve body 1, and the bottom of the valve body 1 is provided with an external nozzle 6 for gas and liquid to exit the valve body 1. The inside of the valve body 1 is provided with a fixed valve plate 2 and a movable valve plate 3, the movable valve plate 3 is located below the fixed valve plate 2 and is in sliding connection with the fixed valve plate 2. The fixed valve plate 2 is located outside the movable valve plate 3 and is fixed on the valve body 1. The movable valve plate 3 and the fixed valve plate 2 are connected by a valve column 4, the valve column 4 is fixedly connected with the movable valve plate 3, and the valve column 4 is in sliding connection with the fixed valve plate 2. The upper part of the valve body 1 and the fixed valve plate 2 form an upper compression chamber 100, the bottom of the valve body 1 and the movable valve plate 3 form a lower compression chamber 200, and the lower compression chamber 200 is in communication with the external nozzle 6. The lower compression chamber 200 always maintains a negative pressure.

[0026] A gas passage 300 is provided between the fixed valve plate 2 and the valve column 4, the upper compression chamber 100 and the lower compression chamber 200 are in communication through the gas passage 300, and the gas in the upper compression chamber 100 enters the lower compression chamber 200 through the gas passage 300. A bypass passage 400 for liquid flow is provided between the upper compression chamber 100 and the lower compression chamber 200, and the liquid is discharged from the upper compression chamber 100 into the lower compression chamber 200 through the bypass passage 400.

[0027] As shown in Figure 5 , Figure 6 , Figure 7 A gas passage 300 is provided between the fixed valve plate 2 and the valve column 4, the upper compression chamber 100 and the lower compression chamber 200 are in communication through the gas passage 300, and the gas in the upper compression chamber 100 enters the lower compression chamber 200 through the gas passage 300. A bypass passage 400 for liquid flow is provided between the upper compression chamber 100 and the lower compression chamber 200, and the liquid is discharged from the upper compression chamber 100 into the lower compression chamber 200 through the bypass passage 400.

[0028] The fixed valve plate 2 has several first bypass ports 9 evenly distributed on it, and the movable valve plate 3 has several second bypass ports 13 evenly distributed on it. The projections of the first bypass ports 9 and the second bypass ports 13 on the same horizontal plane do not overlap. The first bypass ports 9 and the second bypass ports 13 are spaced apart. The first bypass ports 9 and the second bypass ports 13 form a bypass channel 400 connecting the upper pressure chamber 100 and the lower pressure chamber 200. The valve body 1 has a pre-tightening structure inside that applies an upward thrust to the movable valve plate 3. Under normal conditions, the pre-tightening structure maintains a sealed fit between the movable valve plate 3 and the fixed valve plate 2. When the movable valve plate 3 and the fixed valve plate 2 are sealed together, the first bypass ports 9 and the second bypass ports 13 are not connected, and the bypass channel 400 is closed.

[0029] The upper surface of the fixed valve plate 2, the outer surface of the conduit 8, and the inner surface of the valve body 1 form a liquid storage tank 10 for storing liquid. The liquid in the upper pressure chamber 100 is first stored in the liquid storage tank 10. The outer surface of the fixed valve plate 2 is provided with external threads, and the inner surface of the valve body 1 is provided with internal threads that are compatible with the external threads of the fixed valve plate 2. The fixed valve plate 2 and the valve body 1 are connected by threads. The threaded connection can be adjusted to adjust the height of the fixed valve plate 2 in the valve body 1 as needed.

[0030] The upper part of the valve stem 4 is provided with a spiral groove, which forms a spiral channel with the inner wall of the conduit 8. The gas channel 300 is connected to the pressure chamber 200 through the spiral channel and the vent hole 15. The top of the valve stem 4 is provided with a screwdriver blade, which allows a screwdriver with a Torx, flathead, or other shape to rotate the valve stem 4 to tighten or loosen it.

[0031] like Figure 8 As shown, the upper surface of the movable valve plate 3 is a tapered structure that gradually curves downwards from the edge to the center. A sleeve 12 is fixedly installed at the center of the movable valve plate 3, and the valve stem 4 is located inside the sleeve 12. The sleeve 12 has an internal thread, and the lower part of the valve stem 4 has an external thread that matches the internal thread of the sleeve 12. The valve stem 4 and the sleeve 12 are threadedly connected. The threaded connection facilitates the installation of the movable valve plate 3 and the valve stem 4, and allows adjustment of the height of the valve stem 4, thereby adjusting the length of the valve stem 4 inserted into the conduit 8. The length of the valve stem 4 inserted into the conduit 8 affects the length of the spiral channel, which in turn affects the formation of a stable air pressure difference between the upper pressure chamber 100 and the lower pressure chamber 200. The longer the length, the greater the stable air pressure difference.

[0032] When a liquid mixture enters the upper pressure chamber 100 from the gas, the liquid first accumulates in the storage tank 10 until the liquid level is higher than the height of the conduit 8, at which point the liquid enters the gas channel 300. According to the fluid dynamics equations... ; Wherein, μ is the fluid viscosity, L is the length of the spiral channel, r is the channel radius, Q is the liquid flow. In this embodiment, L is the length of the spiral gas channel in the gas channel 300, and r is the diameter of the moving valve plate 3. It can be seen that the parameters of L and ΔP are in direct proportion, that is, the longer the length of the spiral gas channel in the gas channel 300, the greater the pressure between the upper pressure chamber 100 and the lower pressure chamber 200, and vice versa. When the fluid changes from a normal gas to a liquid, the viscosity of the liquid is much larger than that of the gas, so ΔP will be much larger than the pressure when the fluid is a normal gas. The pressure between the upper pressure chamber 100 and the lower pressure chamber 200 is increased by many times.

[0033] The fixed valve plate 2 is fixedly provided with a plurality of limiting tables 11 on the side wall close to the moving valve plate 3, which are arranged in the axial direction of the fixed valve plate 2. The moving valve plate 3 is provided with limiting grooves 14 matched with the limiting tables 11, and the limiting tables 11 are located in the limiting grooves 14 and are in sliding connection with the limiting grooves 14. The limiting tables 11 and the limiting grooves 14 have the effect of guiding and limiting the sliding of the moving valve plate 3.

[0034] The pre-tightening structure includes a spring 5, and the bottom inner surface of the valve body 1 is fixedly provided with a positioning table 7 for positioning the spring 5, and the top end of the spring 5 is connected with the lower surface of the moving valve plate 3. The moving valve plate 3 is threadedly connected with the valve stem 4, and the height of the moving valve plate 3 can be adjusted, so that the pre-tightening force of the spring 5 can be adjusted as needed.

[0035] The weight of the liquid and the spring 5 have a linear mechanical relationship in the Z-axis direction of the valve body 1, which follows the following formula: ; Wherein, ΔF is the pressure borne by the moving valve plate 3, ΔP is the pressure difference between the upper and lower areas divided by the fixed valve plate 2 and the moving valve plate 3, that is, the pressure difference between the upper pressure chamber 100 and the lower pressure chamber 200, A is the pressure receiving area of the moving valve plate 3, k is the stiffness of the spring 5, and x0 is the initial compression amount of the spring 5, The downward displacement of the moving valve plate 3, that is, the compression deformation amount of the spring 5.

[0036] From the above formula, it can be seen that That is, the pre-tightening length of the spring 5 and the liquid retention amount in the liquid storage groove 10 are in a positive relationship, that is, the longer the pre-tightening length of the spring 5, the greater the pressure difference between the upper pressure chamber 100 and the lower pressure chamber 200, and the higher the adjustment threshold of the equipment, and vice versa.

[0037] During the exhaust process, the lower pressure chamber 200 of the valve body 1 can also form a certain volume of gas buffer area, which can absorb the instantaneous negative pressure fluctuation when the gas is rapidly discharged, and keep the pressure difference of the valve body 1 stable.

[0038] The adaptive method based on the above-mentioned gas-liquid mixed phase adaptive negative pressure valve includes the following steps: S1, the external connection nozzle 6 is connected with the external air pump through the connecting pipe, the air pump provides the negative pressure normal environment for the lower pressing cavity 200 through the connecting pipe and the external connection nozzle 6. The moving valve plate 3 is sealed and combined with the lower surface of the fixed valve plate 2 under the action of the spring 5.

[0039] S2, there is a pressure difference between the upper pressing cavity 100 and the lower pressing cavity 200, the gas in the upper pressing cavity 100 enters the lower pressing cavity 200 through the gas passage 300, the capillary spiral passage in the guide pipe 8 and the air hole 15, and the gas is discharged from the valve body 1 through the external connection nozzle 6.

[0040] S3, the liquid in the upper pressing cavity 100 is first stored in the liquid storage groove 10, when the liquid overflows the gas passage 300 on the guide pipe 8, the liquid occupies the gas passage 300 and flows to the lower pressing cavity 200, because the viscosity of the liquid is much larger than that of the gas, a larger pressure difference is generated between the upper pressing cavity 100 and the lower pressing cavity 200, with the increase of the pressure difference, when the pressure difference exceeds the pre-tightening force of the spring 5, the pressure pushes the moving valve plate 3 to move away from the fixed valve plate 2, the first bypass port 9 and the second bypass port 13 are communicated, the liquid in the upper pressing cavity 100 enters the lower pressing cavity 200 through the first bypass port 9 and the second bypass port 13, and is discharged from the valve body 1 through the external connection nozzle 6.

[0041] S4, after the liquid in the upper pressing cavity 100 is discharged, the pressure difference between the upper pressing cavity 100 and the lower pressing cavity 200 decreases and gradually balances, the spring 5 pushes the moving valve plate 3 to move towards the fixed valve plate 2, the moving valve plate 3 and the fixed valve plate 2 reseal, the bypass passage 400 is closed, and the valve body 1 returns to normal.

[0042] Therefore, the gas-liquid mixed phase self-adaptive negative pressure valve and the self-adaptive method thereof can solve the problems of easy blockage and insufficient pressure difference regulation of the existing negative pressure valve.

[0043] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application but not to limit them, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. A gas-liquid mixed phase self-adaptive negative pressure valve, comprising a valve body, the top of the valve body is provided with an opening for gas and liquid to enter the valve body, and the bottom of the valve body is provided with an external nozzle for gas and liquid to exit the valve body; characterized in that: The interior of the valve body is provided with a fixed valve plate and a movable valve plate, the movable valve plate is located below the fixed valve plate and is in sliding connection with the fixed valve plate, the movable valve plate and the fixed valve plate are connected through a valve column, the upper part of the valve body and the fixed valve plate enclose an upper compression chamber, the bottom of the valve body and the movable valve plate enclose a lower compression chamber, the lower compression chamber is in communication with an external nozzle, a gas passage is arranged between the fixed valve plate and the valve column, the upper compression chamber and the lower compression chamber are in communication through the gas passage, and the lower compression chamber normally maintains a negative pressure; a bypass passage for liquid flow is arranged between the upper compression chamber and the lower compression chamber, and the liquid is discharged from the upper compression chamber into the lower compression chamber through the bypass passage; the interior of the valve body is provided with a pre-tightening structure for applying an upward thrust to the movable valve plate, and the pre-tightening structure normally maintains the sealing fit of the movable valve plate and the fixed valve plate.

2. The gas-liquid mixed phase adaptive negative pressure valve according to claim 1, characterized in that: The center of the fixed valve plate is provided with an upwardly protruding guide pipe, the top end of the valve column is located in the guide pipe, and the interior of the guide pipe and the valve column form a gas passage; the movable valve plate is provided with a gas vent hole for allowing gas to pass through the movable valve plate and enter the lower compression chamber, and the gas vent hole is in communication with the gas passage.

3. The gas-liquid mixed phase adaptive negative pressure valve according to claim 1, wherein: The fixed valve plate is uniformly provided with a plurality of first bypass openings, and the movable valve plate is uniformly provided with a plurality of second bypass openings; the projections of the first bypass openings and the second bypass openings on the same horizontal plane do not overlap; and the first bypass openings and the second bypass openings form a bypass passage for communicating the upper compression chamber and the lower compression chamber.

4. The gas-liquid mixed phase adaptive negative pressure valve according to claim 3, characterized in that: The first bypass openings and the second bypass openings are arranged in a spaced manner.

5. The gas-liquid mixed phase adaptive negative pressure valve according to claim 2, wherein: The upper surface of the fixed valve plate, the outer surface of the guide pipe, and the inner surface of the valve body enclose a liquid storage groove for storing liquid; the outer surface of the fixed valve plate is provided with external threads; the inner surface of the valve body is provided with internal threads matched with the external threads of the fixed valve plate; and the fixed valve plate and the valve body are connected through threads.

6. The gas-liquid mixed phase adaptive negative pressure valve according to claim 1, wherein: The upper surface of the movable valve plate is a conical structure gradually downwardly recessed from the edge to the center; the center of the movable valve plate is provided with a sleeve; the valve column is located in the sleeve; the sleeve is provided with internal threads; the lower part of the valve column is provided with external threads matched with the internal threads of the sleeve; and the valve column and the sleeve are connected through threads.

7. The gas-liquid mixed phase adaptive negative pressure valve according to claim 2, wherein: The upper part of the valve column is provided with a spiral groove, the spiral groove and the inner wall of the guide pipe enclose a spiral passage, and the gas passage is in communication with the lower compression chamber through the spiral passage and the gas vent hole.

8. The gas-liquid mixed phase adaptive negative pressure valve according to claim 1, wherein: The side wall of the fixed valve plate close to the movable valve plate is provided with a plurality of limiting tables arranged in the axial direction of the fixed valve plate; the movable valve plate is provided with limiting grooves matched with the limiting tables; and the limiting tables are located in the limiting grooves and are in sliding connection with the limiting grooves.

9. The gas-liquid mixed phase adaptive negative pressure valve according to claim 1, wherein: The pre-tightening structure includes a spring, the bottom inner surface of the valve body is provided with a limiting table for positioning the spring, and the top end of the spring is connected with the lower surface of the movable valve body.

10. An adaptive method based on the gas-liquid hybrid phase adaptive negative pressure valve according to any one of claims 1-9, characterized in that, The method comprises the following steps: S1, the external nozzle is connected with an external gas pump through a connecting pipe, the gas pump provides a negative pressure environment for the lower compression chamber through the connecting pipe and the external nozzle; and the movable valve plate is in sealing fit with the lower surface of the fixed valve plate under the action of the spring; S2, there is a pressure difference between the upper compression chamber and the lower compression chamber, the gas in the upper compression chamber enters the lower compression chamber through the gas passage, the spiral passage in the guide pipe, and the gas vent hole, and the gas is discharged from the valve body through the external nozzle; S3, the liquid in the upper compression chamber is first stored in the liquid storage groove, when the liquid overflows the gas passage on the conduit, the liquid occupies the gas passage and flows to the lower compression chamber, because the viscosity of the liquid is much greater than that of the gas, a greater air pressure difference between the upper compression chamber and the lower compression chamber is generated, with the increase of the air pressure difference, when the air pressure difference exceeds the pre-tightening force of the spring, the air pressure pushes the movable valve disc to move away from the fixed valve disc, the first bypass port and the second bypass port are communicated, the liquid in the upper compression chamber enters the lower compression chamber through the first bypass port and the second bypass port, and is discharged from the valve body through the external connection nozzle; S4, after the liquid in the upper compression chamber is discharged, the air pressure difference between the upper compression chamber and the lower compression chamber decreases and gradually balances, the spring pushes the movable valve disc to move towards the fixed valve disc, the movable valve disc and the fixed valve disc reseal, the bypass passage is closed; the valve body returns to the normal state.

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