A foam volume detection device for gas production by foam drainage

Abstract

The present invention provides a foam volume detection device for foam drainage gas production, which relates to the technical field of foam volume detection. It includes a foam cylinder. The top of the foam cylinder is connected to a high-pressure gas supply device through a gas filling pipe to make the air pressure in the foam cylinder reach the required pressure for detection operations. The bottom of the foam cylinder is filled with the foam drainage liquid to be detected through a peristaltic pump. A self-rotating aeration component is arranged at the bottom of the inner cavity of the foam cylinder. This foam volume detection device for foam drainage gas production can reduce the situation where the gas that has not formed foam overflows into the foam column, avoid the formation of a large cavity in the foam column that occupies the volume of the foam column, and thus can effectively judge the actual foam volume. In addition, the gas that has not formed foam flows to the top of the foam cylinder through the gas collection cavity and the gas guiding cavity, which can also make the air pressure at the top and bottom of the foam cylinder relatively balanced, make the foam column have a better forming state, and is beneficial to judging the actual foam volume.

Description

Technical Field

[0001] The present invention relates to the technical field of foam volume detection, and specifically to a foam volume detection device for foam drainage gas production. Background Technique

[0002] Foam drainage gas production, abbreviated as foam drainage, is one of the main means to solve "gas well liquid accumulation". It is to put a foaming agent (surfactant) into the bottom of a gas well with insufficient liquid carrying capacity from the wellhead, dissolve it in the bottom liquid accumulation to form a foam drainage liquid, and then rely on the airflow when natural gas discharges from the gas well pipeline to contact the bottom liquid accumulation with air injection, so that the foam drainage liquid forms a large amount of stable foam. The foam is discharged from the gas well pipeline to the ground along with the natural gas, so that the bottom liquid accumulation is carried from the bottom to the ground in the form of foam, achieving the purpose of removing the bottom liquid accumulation. Finally, an antifoaming agent is added to the defoaming tank on the ground to achieve gas-liquid separation. Since the bottom liquid accumulation will block the bottom of the exhaust pipeline and affect the rise of natural gas, removing the bottom liquid accumulation can improve the gas production capacity of the gas well.

[0003] The foaming agent is an important raw material that determines the foam drainage effect. There are significant differences in the amount of foam produced by foaming agents with different compositions, which is also an important factor affecting the foam drainage effect.

[0004] When detecting the foam volume of the foaming agent, it is necessary to combine not only the concentration of the foaming agent but also the air pressure conditions at the bottom of the gas well. The air pressure at the bottom of the well is generally several to dozens of atmospheres. Detecting the foam volume of the foaming agent in a high-pressure environment still has many problems in the current technology, such as:

[0005] First, the foaming agent dissolves in the bottom liquid accumulation sample to form a foam drainage liquid. The foam drainage liquid itself does not have the ability to spontaneously generate foam and needs to be filled with gas to form foam. In common foam volume detection devices (such as a circulating foam meter), gas is filled into the foam drainage liquid at the bottom of the foam cylinder of the foam meter to make the foam drainage liquid produce a large amount of foam, and the amount of foam is judged according to the height of the foam accumulated in the foam cylinder. However, not all the gas filled into the foam drainage liquid can form foam. The gas that does not form foam overflows from the foam drainage liquid into the foam column accumulated above it, forming a large cavity that occupies the volume of the foam column, which will affect the judgment of the foam volume and it is difficult to effectively judge the actual foam volume.

[0006] Second, since gas injection is required to form foam by flushing the foam drainage fluid, and the air pressure in the foam cylinder must be kept constant under the high-pressure closed detection conditions, an up-and-down circulation gas injection method must be adopted, that is, the gas pump is used to pump the gas at the top of the foam cylinder into the foam drainage fluid at the bottom of the foam cylinder, and the foam column formed by the foam drainage fluid is located in the lower middle of the foam cylinder. However, this will cause the air pressure at the top and bottom of the foam cylinder to be unbalanced, resulting in a situation where the air pressure at the top of the foam cylinder is small and the air pressure at the bottom is large. The gas that has not formed foam quickly floats up into the foam column, which will not only cause a large cavity to form in the foam column and occupy the volume of the foam column, but also disrupt the state of the foam, making it difficult to effectively judge the actual foam volume.

[0007] Therefore, we propose a foam volume detection device for foam drainage gas production to solve the above problems. Summary of the Invention

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a foam volume detection device for foam drainage gas production, including a foam cylinder. The top of the foam cylinder is connected to a high-pressure gas supply device through a gas filling pipe to make the air pressure in the foam cylinder reach the required pressure for detection operations. The bottom of the foam cylinder is filled with the foam drainage fluid to be detected through a peristaltic pump.

[0009] A self-rotating aeration component is arranged at the bottom of the inner cavity of the foam cylinder. An air pump is arranged outside the foam cylinder. The air inlet end of the air pump is connected to the top of the foam cylinder, and the air outlet end of the air pump is connected to the self-rotating aeration component to pump the gas at the top of the foam cylinder into the self-rotating aeration component to form foam in the foam drainage fluid at the bottom of the foam cylinder.

[0010] The foam cylinder is made of a transparent material, and scale lines are arranged on the outer surface of the foam cylinder to facilitate observing the height of the foam column.

[0011] Specifically, the self-rotating aeration component includes a gas guiding joint fixed to the bottom wall of the foam cylinder. The top of the gas guiding joint is rotatably connected to a gas guiding cap, and the gas guiding cap and the gas guiding joint are in a sealed rotational connection. A plurality of L-shaped gas guiding pipes are fixedly communicated with the outer surface of the gas guiding cap, and the plurality of gas guiding pipes are arranged in an equidistant circular array about the rotation axis of the gas guiding cap. The bottom end of the gas guiding joint is connected to the output end of the air pump, and a check valve A is arranged between the bottom end of the gas guiding joint and the output end of the air pump.

[0012] In the above solution, the gas at the top of the foam cylinder is pumped into the self-rotating aeration component by the air pump and then discharged through a plurality of gas guiding pipes to fill air into the foam drainage fluid at the bottom of the foam cylinder. At the same time, because the gas guiding pipes are L-shaped, they can also rotate together with the gas guiding cap to realize the stirring effect on the foam drainage fluid.

[0013] Above the self-rotating aeration component, there is a hemispherical platform. The top surface of the hemispherical platform is flat and the bottom surface is arc-shaped. The hemispherical platform is fixed to the inner wall of the foam cylinder through multiple support rods. A motor is fixed at the top of the foam cylinder. A rotating rod is rotatably arranged on the top wall of the foam cylinder. The top end of the rotating rod is fixed to the output end of the motor, and the bottom end of the rotating rod is rotatably arranged in the middle of the top surface of the hemispherical platform.

[0014] On the outer surface of the bottom end of the rotating rod, multiple arc-shaped blades are fixed. The multiple arc-shaped blades are arranged in an equidistant circular array about the axis of the rotating rod. A baffle plate is fixedly connected to the bottom surfaces of the multiple arc-shaped blades. The bottom surface of the baffle plate is in sliding contact with the upper surface of the hemispherical platform. At the top of each arc-shaped blade, an arc-shaped bar is fixed, and the arc-shaped bar is fixed on the outer surface of the rotating rod. The cross-section of the arc-shaped bar is arc-shaped. Above the arc-shaped blades, multiple L-shaped support rods for supporting foam are provided. The multiple L-shaped support rods are arranged in an equidistant circular array about the rotating rod. One end of each of the multiple L-shaped support rods away from each other is fixed to the inner wall of the foam cylinder.

[0015] When the arc-shaped blades rotate, they scrape the foam to above them. A gas collection cavity is formed between every two adjacent arc-shaped blades, and a gas guiding cavity communicating with the gas collection cavity is formed between every two adjacent arc-shaped bars.

[0016] The arc-shaped bar rotates in the direction of its convex surface, and the rotation direction of the self-rotating aeration component is opposite to the rotation direction of the arc-shaped blades.

[0017] Furthermore, a ring-shaped water spray pipe is arranged at the top of the inner cavity of the foam cylinder. The ring-shaped water spray pipe is communicated with a high-pressure water pump through a water inlet pipe. A check valve B is also arranged between the water inlet pipe and the ring-shaped water spray pipe. The bottom of the foam cylinder is fixedly communicated with a waste discharge valve.

[0018] Compared with the prior art, the foam volume detection device for foam drainage gas production has the following beneficial effects:

[0019] When the foam amount of the foam drainage liquid is detected, the present invention uses an air pump to draw the gas at the top of the foam cylinder into the self-rotating aeration component, and then disperses it into the foam drainage liquid, so that the foam drainage liquid at the bottom of the foam cylinder continuously forms foam and accumulates upward; at the same time, the motor drives the rotating rod, the arc-shaped blades and the arc-shaped strips to rotate together, and the arc-shaped blades are used to push the foam above the foam drainage liquid upward, and the foam is supported by the L-shaped support rod, so that the foam forms a foam column that is constantly increasing. At the same time, the foam is pushed outward by the arc-shaped strips, and the foam is prevented from entering the air guide cavity as much as possible, so that the foam column forms a hollow column. At the same time, a plurality of arc-shaped strips are used to push the foam above the foam drainage liquid upward, and the foam is supported by the L-shaped support rod, so that the foam forms a foam column that is constantly increasing. At the same time, the foam is pushed outward by the arc-shaped strips, and the foam is prevented from entering the air guide cavity as much as possible, so that the foam column forms a hollow column. The gas collecting cavity formed between the blades can form multiple gas collecting chambers above the foam liquid to collect the gas that has not formed foam on the foam liquid. The gas then flows to the top of the foam column through the gas guide cavity, which can reduce the situation where the gas that has not formed foam overflows into the foam column and avoids the formation of a larger cavity in the foam column that occupies the volume of the foam column, thereby effectively judging the actual amount of foam. In addition, the gas that has not formed foam flows to the top of the foam tube through the gas collecting cavity and the gas guide cavity, which can also make the air pressure at the top and bottom of the foam tube more balanced, so that the foam column has a better forming state, which is conducive to judging the actual amount of foam.

[0020] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0022] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0023] Figure 3 It is a front cross-sectional view of the internal structure of the foam tube of the present invention;

[0024] Figure 4 It is a schematic diagram of the bottom structure of the foam tube in the present invention;

[0025] Figure 5 The bottom structure of the foam tube explodes. Figure 1 ;

[0026] Figure 6 The bottom structure of the foam tube explodes. Figure 2 ;

[0027] Figure 7 The bottom structure of the foam tube explodes. Figure 3 ;

[0028] Figure 8 Schematic diagram of the three-dimensional structure of the arc-shaped blade and the arc-shaped bar in the present invention Figure 1 ;

[0029] Figure 9 Schematic diagram of the three-dimensional structure of the arc-shaped blade and the arc-shaped bar in the present invention Figure 2 ;

[0030] Figure 10 Schematic diagram of the three-dimensional structure of the arc-shaped blade and the arc-shaped bar in the present invention Figure 3 ;

[0031] Figure 11 Schematic diagram of the cross-sectional state of the foam column formed in the foam cylinder in the present invention;

[0032] Figure 12 Schematic diagram of the three-dimensional state of the foam column formed in the foam cylinder in the present invention;

[0033] Figure 13 Schematic diagram of the state where the foam column formed in the foam cylinder has a cavity in the present invention.

[0034] In the figure:

[0035] 1. Foam cylinder; 2. Inflatable tube; 3. Peristaltic pump;

[0036] 4. Self-rotating aeration assembly; 401. Air guide joint; 402. Air guide cap; 403. Air guide pipe;

[0037] 5. Air pump; 6. Hemispherical platform; 7. Motor; 8. Rotating rod;

[0038] 9. Arc-shaped blade; 901. Bubble baffle; 902. Gas collection cavity;

[0039] 10. Arc-shaped bar; 1001. Air guide cavity;

[0040] 11. L-shaped support rod; 12. Annular water spray pipe; 13. Water inlet pipe; 14. Waste discharge valve;

[0041] 15. Foam drainage;

[0042] 16. Foam column; 1601. Cavity. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0044] Please refer to Figure 13 , in combination with the problems in the background technology:

[0045] 1. The foaming agent is dissolved in the bottom-hole liquid accumulation sample to form the foam drainage liquid 15. The foam drainage liquid 15 itself does not have the ability to generate foam spontaneously. It is necessary to inject gas into the foam drainage liquid 15 to form foam. For common foam quantity detection devices (such as a circulating foam meter), gas is filled into the foam drainage liquid 15 at the bottom of the foam cylinder 1 of the foam meter to cause a large amount of foam to be generated in the foam drainage liquid 15, and the amount of foam is judged according to the height of the foam accumulated in the foam cylinder 1. However, not all the gas filled into the foam drainage liquid 15 can form foam. The gas that does not form foam overflows from the foam drainage liquid 15 into the foam column 16 accumulated above it, forming a large cavity 1601 and occupying the volume of the foam column 16, which will affect the judgment of the foam quantity and it is difficult to effectively judge the actual foam quantity.

[0046] 2. Since it is necessary to inject gas into the foam drainage liquid 15 to form foam, in the high-pressure closed detection condition and to keep the air pressure in the foam cylinder 1 constant, it is necessary to adopt an up-and-down circulating gas injection method, that is, use an air pump 5 to pump the gas at the top of the foam cylinder 1 into the foam drainage liquid 15 at the bottom of the foam cylinder 1. The foam column 16 formed by the foam drainage liquid 15 is located in the middle and lower part of the foam cylinder 1. However, this will cause the air pressure at the top and bottom of the foam cylinder 1 to be unbalanced, resulting in a situation where the air pressure at the top of the foam cylinder 1 is small and the air pressure at the bottom is large. The gas that has not formed foam quickly floats up into the foam column 16, which will not only cause a large cavity 1601 to be formed in the foam column 16 and occupy the volume of the foam column 16, but also disrupt the state of the foam, making it difficult to effectively judge the actual foam quantity.

[0047] Please refer to Figures 1 to 13 , to solve the above problems, the present invention provides the following implementation scheme: A foam quantity detection device for foam drainage gas production includes a foam cylinder 1. The foam cylinder 1 is a closed cylinder. The top of the foam cylinder 1 is connected to a high-pressure gas supply device through a gas filling pipe 2 to make the air pressure in the foam cylinder 1 reach the required pressure for the detection operation. The bottom of the foam cylinder 1 is filled with the foam drainage liquid 15 (detection sample) to be detected through a peristaltic pump 3. The foam drainage liquid 15 is prepared by mixing the liquid accumulation sample at the bottom of the gas well with the foaming agent in a specified ratio.

[0048] A self-rotating aeration component 4 is arranged at the bottom of the inner cavity of the foam cylinder 1. An air pump 5 is arranged outside the foam cylinder 1. The air inlet end of the air pump 5 is connected to the top of the foam cylinder 1, and the air outlet end of the air pump 5 is connected to the self-rotating aeration component 4, pumping the gas at the top of the foam cylinder 1 into the self-rotating aeration component 4 and then dispersing it into the foam drainage liquid 15, so that the foam drainage liquid 15 at the bottom of the foam cylinder 1 forms foam and accumulates upward to form a foam column 16.

[0049] Please pay special attention to Figure 1and Figure 2 The foam cylinder 1 is made of a transparent material, and scale lines are provided on the outer surface of the foam cylinder 1 to facilitate observing the height of the foam column 16 and determining the foam volume of the test sample.

[0050] Please refer particularly to Figure 3 、 Figure 4 and Figure 7 Specifically, the self-rotating aeration assembly 4 includes an air guide joint 401 fixed to the bottom wall of the foam cylinder 1. The top of the air guide joint 401 is rotatably connected to an air guide cap 402, and the air guide cap 402 and the air guide joint 401 are in a sealed rotational connection. A plurality of L-shaped air guide pipes 403 are fixedly communicated with the outer surface of the air guide cap 402, and the plurality of air guide pipes 403 are arranged in an equidistant circumferential array with respect to the rotation axis of the air guide cap 402. The bottom end of the air guide joint 401 is communicated with the output end of the air pump 5, and a one-way valve A is provided between the bottom end of the air guide joint 401 and the output end of the air pump 5.

[0051] The air pump 5 pumps the gas at the top inside the foam cylinder 1 into the self-rotating aeration assembly 4 and then discharges it through the plurality of air guide pipes 403 to fill the foam drainage liquid 15 at the bottom of the foam cylinder 1 with air. At the same time, since the air guide pipes 403 are L-shaped, when the air guide pipes 403 discharge gas, they can also rotate together with the air guide cap 402 to achieve the stirring effect on the foam drainage liquid 15. During the stirring, the formed foam will also rotate along with the foam drainage liquid 15.

[0052] Above the self-rotating aeration assembly 4, there is a hemispherical platform 6 for making the foam below the hemispherical platform 6 float upward to the periphery of the hemispherical platform 6. The top surface of the hemispherical platform 6 is flat and the bottom surface is arc-shaped. The hemispherical platform 6 is fixed to the inner wall of the foam cylinder 1 through a plurality of support rods. A motor 7 is fixed to the top of the foam cylinder 1, and a rotating rod 8 is rotatably arranged on the top wall of the foam cylinder 1. The top end of the rotating rod 8 is fixed to the output end of the motor 7, and the bottom end of the rotating rod 8 is rotatably arranged in the middle of the top surface of the hemispherical platform 6. The motor 7 drives the rotating rod 8 to rotate at a low speed.

[0053] Please refer particularly to Figure 2 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 10 A plurality of arc-shaped blades 9 are fixed to the outer surface of the bottom end of the rotating rod 8, and the plurality of arc-shaped blades 9 are arranged in an equidistant circumferential array with respect to the axis line of the rotating rod 8. A foam blocking plate 901 is fixedly connected to the bottom surfaces of the plurality of arc-shaped blades 9, and the bottom surface of the foam blocking plate 901 is in sliding contact with the upper surface of the hemispherical platform 6. By providing the foam blocking plate 901, the foam is prevented from entering between the plurality of arc-shaped bars 10.

[0054] A curved strip 10 is fixed to the top of each curved blade 9, and the curved strip 10 is fixed to the outer surface of the rotating rod 8, and the cross section of the curved strip 10 is curved. Starting the motor 7 can drive the rotating rod 8, the curved blade 9, the bubble baffle 901 and the curved strip 10 to rotate together.

[0055] A plurality of L-shaped supporting rods 11 for supporting foam are disposed above the arc-shaped blades 9 , and the plurality of L-shaped supporting rods 11 are arranged in an equidistant circular array about the rotating rod 8 , and the ends of the plurality of L-shaped supporting rods 11 that are away from each other are fixed to the inner wall of the foam tube 1 .

[0056] The arc blades 9 scrape the foam to the top thereof when rotating, and a gas collecting cavity 902 is formed between every two adjacent arc blades 9, and a gas guiding cavity 1001 connected to the gas collecting cavity 902 is formed between every two adjacent arc strips 10 (see Figures 8 to 10 ).

[0057] The arc-shaped strip 10 rotates in the direction of its convex surface, and the rotation direction of the self-rotating aeration component 4 is opposite to the rotation direction of the arc-shaped blade 9. Please refer to Figure 5 It can be understood that the self-rotating aeration component 4 drives the foam drainage liquid 15 and the foam on its liquid surface to rotate together, and the rotation direction of the foam is opposite to that of the arc-shaped blades 9, which is conducive to scraping the foam upwards through the arc-shaped blades 9.

[0058] Through the above scheme, the air pump 5 is used to draw the gas at the top of the foam tube 1 into the self-rotating aeration component 4, and then dispersed into the bubble drainage liquid 15, so that the bubble drainage liquid 15 at the bottom of the foam tube 1 continuously forms foam and accumulates upward; at the same time, the motor 7 drives the rotating rod 8, the arc-shaped blades 9 and the arc-shaped strips 10 to rotate together, and the arc-shaped blades 9 are used to push the foam above the bubble drainage liquid 15 upward, and the foam is supported by the L-shaped support rod 11, so that the foam forms a foam column 16 that is constantly increasing. At the same time, the arc-shaped strips 10 are used to push the foam outward, and the foam is prevented from entering the air guide cavity 1001 as much as possible, so that the foam column 16 forms a hollow column (see 11 and Figure 12 ), at the same time, the gas collecting cavity 902 formed between the multiple arc-shaped blades 9 can form multiple gas collecting chambers above the foam discharge liquid 15 to collect the gas that has not formed foam on the foam discharge liquid 15, and the gas then flows to the top of the foam column 16 through the gas guide cavity 1001 (see Figure 12 ), so as to reduce the situation where the gas that has not formed foam overflows into the foam column 16, and avoid the formation of a larger cavity 1601 in the foam column 16 and occupying the volume of the foam column 16, so as to effectively judge the actual amount of foam; in addition, the gas that has not formed foam flows to the top of the foam tube 1 through the gas collecting cavity 902 and the gas guiding cavity 1001, and the air pressure at the top and bottom of the foam tube 1 can be more balanced, so that the foam column 16 has a better molding state, which is conducive to judging the actual amount of foam.

[0059] Further, a ring-shaped water spray pipe 12 is provided at the top of the inner cavity of the foam cylinder 1. The ring-shaped water spray pipe 12 is communicated with a high-pressure water pump through a water inlet pipe 13. A check valve B is further provided between the water inlet pipe 13 and the ring-shaped water spray pipe 12. The bottom of the foam cylinder 1 is fixedly communicated with a waste discharge valve 14.

[0060] After the detection operation is completed, the inside of the foam cylinder 1 is cleaned through the ring-shaped water spray pipe 12, and then the waste liquid is discharged through the waste discharge valve 14 to facilitate the next detection operation.

[0061] The working principle has been shown in order above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

Claims

1. A foam quantity detection device for foam drainage and gas collection, comprising a foam cylinder (1), the top of the foam cylinder (1) being connected to a high-pressure air supply device through an air filling pipe (2), and the bottom of the foam cylinder (1) being filled with a foam drainage liquid to be detected through a peristaltic pump (3), characterized in that: A self-rotating aeration component (4) is arranged at the bottom of the inner cavity of the foam cylinder (1), an air pump (5) is arranged outside the foam cylinder (1), an air inlet end of the air pump (5) is connected to the top of the foam cylinder (1), and an air outlet end of the air pump (5) is connected to the self-rotating aeration component (4); A hemispherical platform (6) is provided above the self-rotating aeration component (4), the hemispherical platform (6) being fixed to the inner wall of the foam cylinder (1) via a plurality of support rods, a motor (7) being fixed to the top of the foam cylinder (1), a rotating rod (8) being rotatably provided on the top wall of the foam cylinder (1), the top end of the rotating rod (8) being fixed to the output end of the motor (7), and the bottom end of the rotating rod (8) being rotatably provided at the middle of the top surface of the hemispherical platform (6); A plurality of arc-shaped blades (9) are fixed to the outer surface of the bottom end of the rotating rod (8), and the plurality of arc-shaped blades (9) are arranged in an equidistant circular array about the axis of the rotating rod (8). A bubble blocking plate (901) is fixed to the bottom surfaces of the plurality of arc-shaped blades (9), and an arc-shaped strip (10) is fixed to the top of each of the arc-shaped blades (9), and the arc-shaped strip (10) is fixed to the outer surface of the rotating rod (8), and the cross section of the arc-shaped strip (10) is arc-shaped. A plurality of L-shaped support rods (11) for supporting foam are arranged above the arc-shaped blades (9), and the ends of the plurality of L-shaped support rods (11) that are away from each other are fixed to the inner wall of the foam tube (1); The arc-shaped blades (9) scrape the foam above them when rotating, and a gas collecting cavity (902) is formed between every two adjacent arc-shaped blades (9), and a gas guiding cavity (1001) connected to the gas collecting cavity (902) is formed between every two adjacent arc-shaped strips (10).

2. A foam quantity detection device for foam drainage and gas collection according to claim 1, characterized in that: The self-rotating aeration component (4) comprises an air guide joint (401) fixed to the bottom wall of the foam cylinder (1); an air guide cap (402) is rotatably connected to the top of the air guide joint (401); the air guide cap (402) and the air guide joint (401) are in sealed rotatable connection; a plurality of L-shaped air guide pipes (403) are fixedly connected to the outer surface of the air guide cap (402); the plurality of air guide pipes (403) are arranged in an equidistant circular array about the rotation axis of the air guide cap (402).

3. A foam quantity detection device for foam drainage and gas collection according to claim 2, characterized in that: The bottom end of the air guide joint (401) is connected to the output end of the air pump (5), and a one-way valve A is provided between the bottom end of the air guide joint (401) and the output end of the air pump (5).

4. A foam quantity detection device for foam drainage and gas collection according to claim 1, characterized in that: The foam tube (1) is made of a transparent material, and scale lines are provided on the outer surface of the foam tube (1).

5. The foam quantity detection device for foam drainage and gas collection according to claim 1 is characterized in that: An annular water spray pipe (12) is arranged at the top of the inner cavity of the foam cylinder (1), the annular water spray pipe (12) is connected to a high-pressure water pump via a water inlet pipe (13), and a waste discharge valve (14) is fixedly connected to the bottom of the foam cylinder (1).

6. A foam quantity detection device for foam drainage and gas collection according to claim 1, characterized in that: The arc-shaped strip (10) rotates in the direction of its convex surface, and the rotation direction of the self-rotating aeration component (4) is opposite to the rotation direction of the arc-shaped blades (9).

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