Automatic soap film flowmeter

Abstract

The utility model relates to the field of soap film flow meters, in particular to an automatic soap film flow meter which comprises a supporting seat internally provided with an extrusion control device and a soap liquid filling part filled with soap liquid, the extrusion control device can extrude the soap liquid filling part, and the extrusion distance and time interval of the extrusion soap liquid filling part are controllable; the pipe hoop is fixedly arranged on the upper surface of the supporting base and comprises a bearing column and clamping rings located at the two ends of the bearing column, the soap film pipe is borne by the clamping rings and comprises a film breaking part, a soap film channel and a liquid conveying channel, the bottom of the film breaking part is in a concave face shape, and the maximum diameter of the film breaking part is larger than the diameter of the soap film channel and the diameter of the clamping rings. According to the liquid soap release device, the purpose of accurately controlling the liquid soap release amount and the time sequence is achieved, the measurement precision is effectively improved, and personal errors are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of soap film flowmeter, in particular to an automatic soap film flowmeter. BACKGROUND

[0002] The soap film flowmeter is an important device for measuring gas flow, and the common soap film flowmeter on the market mainly relies on manual operation to generate soap film. Specifically, the operator directly squeezes the liquid storage container with his hand to release the soap solution to form a soap film, and records the data by visual observation to complete the flow measurement.

[0003] However, in the actual application process, it is found that the above-mentioned traditional method has the problem of being difficult to accurately control the release of the soap solution, and it is not possible to squeeze the liquid storage container at a fixed time and quantity, which is easy to cause continuous generation of multiple soap films in a short time due to improper operation, or it is not possible to accurately grasp the timing of soap film extrusion, thereby seriously affecting the final measurement accuracy. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to overcome the above technical problems, and provide an automatic soap film flowmeter.

[0005] An automatic soap film flowmeter comprises:

[0006] A support seat is internally provided with an extrusion control device and a soap solution filling part filled with soap solution, the extrusion control device can extrude the soap solution filling part, and the extrusion distance and time interval of the extrusion control device extruding the soap solution filling part are controllable;

[0007] A pipe clamp is fixedly arranged on the upper surface of the support seat, the pipe clamp comprises a bearing column and clamping rings located at both ends of the bearing column, and

[0008] A soap film tube is carried on the clamping rings, the soap film tube comprises a film breaking part, a soap film channel and a liquid delivery channel, the bottom of the film breaking part is concave, the maximum diameter of the film breaking part is greater than the diameter of the soap film channel and the diameter of the clamping ring, and the liquid delivery channel is located at the bottom of the soap film channel and communicates with the soap solution filling part.

[0009] By adopting the above scheme, the soap solution filling part and the extrusion device for extruding the soap solution filling part are arranged in the support seat, the extrusion of the soap solution filling part by the extrusion device is more accurate, it is avoided that multiple soap films are generated at one time when the soap film is extruded, or the soap film extrusion time is not accurate, thereby affecting the measurement result, the soap film moves in the soap film channel, when the soap film moves to the top of the soap film channel, it passes through the film breaking part, because the diameter of the film breaking part is larger, the soap film will be broken, the soap solution forming the soap film will flow down along the side wall of the film breaking part and return to the soap solution filling part for repeated use, thereby saving cost, and the bottom of the film breaking part can be carried on the clamping ring in use, thereby avoiding the soap film tube from falling off from the clamping ring.

[0010] In one of the embodiments, the top of the soap film channel protrudes from the bottom of the membrane breaking part, and the top of the membrane breaking part is communicated with the outside.

[0011] By using the above scheme, the user can pour the soap liquid from the top of the membrane breaking part. Since the top of the soap film channel protrudes from the bottom of the membrane breaking part, when the liquid level of the soap liquid is higher than the top of the soap film channel, the soap liquid can flow down along the inner wall of the soap film channel, which can ensure that the soap liquid can cover the inner wall surface of the soap film channel, thereby achieving the wetting effect.

[0012] In one of the embodiments, a water permeation hole is arranged at the connecting part between the soap film channel and the bottom of the membrane breaking part.

[0013] By using the above scheme, when the soap liquid immerses the water permeation hole, the soap liquid can pass through the water permeation hole and then flow down along the inner wall surface of the soap film channel, thereby further enhancing the wetting effect when the soap liquid flows into the soap film channel. Meanwhile, the soap film will be broken when passing through the water permeation hole, thereby enhancing the membrane breaking effect.

[0014] In one of the embodiments, the bottom of the membrane breaking part is spherical, and the top of the membrane breaking part is provided with an air outlet hole.

[0015] By using the above scheme, since the soap liquid will splash when the soap film is broken, the membrane breaking part is designed to be spherical, so that the soap liquid can splash to the side wall of the membrane breaking part after being broken, and then flow down along the side wall. This can prevent the soap liquid from splashing out of the membrane breaking part to pollute the working environment, and the soap liquid splashed to any part of the membrane breaking part can flow down along the side wall of the membrane breaking part, thereby enhancing the backflow effect of the membrane breaking part.

[0016] In one of the embodiments, the membrane breaking part is funnel-shaped, the edge of the top of the membrane breaking part extends vertically upward to form a water retaining edge, and the top of the water retaining edge forms a water pouring opening.

[0017] By using the above scheme, when the membrane breaking part is funnel-shaped, the water retaining edge can prevent the soap liquid from splashing out of the membrane breaking part. Meanwhile, the top of the water retaining edge forms a water pouring opening, so that the soap liquid can be directly poured into the membrane breaking part through the water pouring opening, thereby improving the water pouring efficiency.

[0018] In one of the embodiments, the soap liquid filling part includes a liquid storage bag and a fixing plate fixed to one end of the liquid storage bag. The fixing plate is vertically fixed to the bottom surface of the inner cavity of the support seat. The liquid storage bag is columnar and is an elastic body. An elastic member is arranged inside the liquid storage bag. The liquid delivery channel is communicated with the liquid storage bag through the fixing plate. The extrusion control device extrudes one end of the liquid storage bag away from the fixing plate.

[0019] By adopting the above scheme, the liquid storage bag is designed as an elastic body, and the liquid storage bag can automatically recover after being extruded. The liquid storage bag is designed as a column, and the water output volume of the liquid storage bag is basically the same when the liquid storage bag is compressed by the same distance, so that the extrusion control device can extrude the liquid storage bag more accurately to control the water output of the liquid storage bag.

[0020] In one of the embodiments, the extrusion control device comprises an extrusion plate, a driving control member, and a driving screw connected with the driving control member, and the driving screw penetrates through the extrusion plate.

[0021] By adopting the above scheme, the extrusion plate can be accurately moved to accurately extrude the liquid storage bag.

[0022] In one of the embodiments, the upper surface of the support seat is provided with a receiving table, the upper surface of the receiving table is provided with a receiving recess, and the infusion channel penetrates through the middle part of the receiving recess, and the receiving recess is opposite to the bottom of the soap film tube.

[0023] By adopting the above scheme, when the soap film tube is disassembled, the residual soap solution in the soap film tube can flow out from the bottom of the soap film tube to contaminate the support seat. By arranging the receiving table on the surface of the support seat, the dripping soap solution can fall into the receiving recess for centralized cleaning.

[0024] In one of the embodiments, the bearing column comprises a movable clamping column and a fixed clamping column, the clamping ring is composed of two semicircles respectively located on the movable clamping column and the fixed clamping column, the upper surface of the support seat is provided with a sliding groove, the movable clamping column can slide along the sliding groove, the bottom of the movable clamping column is fixedly provided with an adjustable telescopic rod, the end of the telescopic rod away from the movable clamping column is connected with a movable rack, and one side of the receiving table facing the bearing column is provided with a fixed rack matched with the movable rack.

[0025] By adopting the above scheme, in the sliding process of the movable clamping column, the size of the clamping ring also changes, so that the clamping ring can bear soap film tubes of different sizes.

[0026] In one of the embodiments, the clamping ring is fixedly provided with a sensing device, and the sensing device can sense the position of the soap film.

[0027] By adopting the above scheme, in the moving process of the soap film in the soap film tube, the scale captured by the human eye is not accurate, and the measurement result of the sensing device fixedly arranged on the clamping ring is more accurate.

[0028] In summary, the present application has at least one of the following beneficial technical effects:

[0029] 1. By setting a soap filling part and a squeezing device for squeezing the soap filling part inside the support seat, the squeezing of the soap filling part by the squeezing device is more accurate, avoiding the generation of multiple soap films at one time when the soap film is squeezed, or the inaccurate soap film extrusion time affecting the measurement results, the soap film moves in the soap film channel, and when the soap film moves to the top of the soap film channel, it passes through the film breaking part. Because the diameter of the film breaking part is larger, the soap film will break, and the soap solution forming the soap film will flow down the side wall of the film breaking part back into the soap filling part for repeated use, saving costs. The bottom of the film breaking part can be supported on the clamping ring during use to prevent the soap film tube from falling out of the clamping ring.

[0030] 2. The user can pour soap from the top of the film breaking part, and the top of the soap film channel protrudes from the bottom of the film breaking part. When the liquid level of the soap is higher than the top of the soap film channel, the soap can flow down the inner wall of the soap film channel, ensuring that the soap can cover the inner wall surface of the soap film channel, thereby achieving the effect of wetting. By providing a water seepage hole in the soap film channel, when the soap seeps into the water seepage hole, the soap can pass through the water seepage hole and flow down the inner wall surface of the soap film channel, further enhancing the wetting effect when the soap flows into the soap film channel. At the same time, the soap film will break when it passes through the water seepage hole, enhancing the film breaking effect.

[0031] 3. The liquid storage bag is designed as an elastic body, which can automatically recover after being squeezed. The liquid storage bag is designed in a columnar shape, and the water volume of the liquid storage bag is basically the same when it is compressed by the same distance, so that the squeezing control device can more accurately squeeze the liquid storage bag to control the water output of the liquid storage bag. During the recovery process of the liquid storage bag, an adsorption force is generated inside the soap film channel, which can wash away the residual soap in the side wall of the soap film channel, avoiding the influence of the residual soap on the measurement results of the flowmeter. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structural schematic diagram of an automatic soap film flowmeter provided by the first embodiment of the present application.

[0033] Figure 2 is a schematic diagram of the internal structure of the support seat provided by the first embodiment of the present application.

[0034] Figure 3 is a sectional view of the squeezing control device and the soap filling part of the first embodiment of the present application.

[0035] Figure 4 is a sectional view of the soap film tube of the first embodiment of the present application.

[0036] Figure 5 is a sectional view of the soap film tube of the second embodiment of the present application.

[0037] Explanation of reference numerals: 1, support seat; 11, extrusion control device; 111, extrusion plate; 112, drive control member; 113, drive screw; 12, soap filling part; 121, liquid storage bag; 1211, elastic member; 122, fixed plate; 13, material receiving table; 131, material receiving recess; 132, fixed rack; 14, sliding groove; 2, pipe clamp; 21, bearing column; 211, fixed clamping column; 212, movable clamping column; 2121, telescopic rod; 2122, movable rack; 22, clamping ring; 221, sensing device; 3, soap film tube; 31, membrane breaking part; 311, air outlet; 312, water retaining edge; 3121, water injection opening; 32, soap film passage; 321, water permeation hole; 33, liquid delivery passage. DETAILED DESCRIPTION

[0038] Therefore, it is necessary to provide an automatic soap film flowmeter capable of accurately controlling the release of soap liquid.

[0039] Please refer to Figure 1 , Figure 1 The structure diagram of an automatic soap film flowmeter provided by the first embodiment of the application comprises a support seat 1, a pipe clamp 2, and a soap film tube 3.

[0040] Embodiment 1

[0041] The support seat 1 is internally provided with a soap filling part 12 for storing soap liquid and an extrusion control device 11 for accurately extruding the soap filling part 12, which can control the distance and time interval of extrusion. The pipe clamp 2 is fixed above the support seat 1 and comprises a bearing column 21 and a clamping ring 22 for stably placing the soap film tube 3. The soap film tube 3 itself is composed of a membrane breaking part 31, a soap film passage 32, and a liquid delivery passage 33. The bottom of the membrane breaking part 31 is concave, and its maximum diameter exceeds the soap film passage 32 and the clamping ring 22. The purpose of this design is to ensure that the formed soap film is effectively broken when it reaches the top, and the soap liquid splashed after the soap film is broken is not wasted. The design of the entire system aims to improve the utilization efficiency of soap liquid while ensuring the accuracy of measurement.

[0042] Please refer to Figures 2-3 , Figure 3The internal structure of the support base 1 of the first embodiment of the present application is shown in the figure. The support base 1 is the basic load-bearing part of the entire device. The support base 1 is internally provided with a soap liquid filling part 12 for storing soap liquid and an extrusion control device 11 for precisely extruding the soap liquid filling part 12. The extrusion control device 11 includes an extrusion plate 111, a drive control member 112, and a drive screw 113 connected to the drive control member 112. The drive control assembly can use a rudder machine or a stepper motor to replace the traditional drive rudder machine. The rotation angle is determined by precisely setting the number of pulse signals, and then converted into linear motion by a speed reducer to push the extrusion plate 111 forward. Alternatively, a cylinder combined with a solenoid valve is used as a power unit to drive the piston rod to extend to achieve the same purpose by relying on compressed air pressure. In the present application, the rudder drive screw 113 rotates, the screw cooperates with the extrusion plate 111, and the screw moves the extrusion plate 111 during rotation, thereby extruding the soap liquid filling part 12.

[0043] The soap liquid filling part 12 includes a liquid storage bag 121 and its fixing plate 122. The liquid storage bag 121 is a flexible columnar object that can be made of silica gel or other flexible high polymer materials. It is internally provided with an elastic member 1211 to maintain its shape recovery ability. This special structure allows it to quickly return to its original shape after each press. When the liquid storage bag 121 is compressed by the same distance, the water volume of the liquid storage bag 121 is basically the same, which enables the extrusion control device 11 to more accurately extrude the liquid storage bag 121 and control the water output of the liquid storage bag 121. When the liquid storage bag 121 returns to its original shape after being compressed, negative pressure is generated inside the liquid storage bag 121, thereby absorbing the gas inside the soap film tube 3. In the process of inhaling air, the liquid storage bag 121 can suck the residual soap liquid on the side wall of the soap film tube 3 into the liquid storage bag 121, preventing too much residual soap liquid on the side wall of the soap film tube 3 from affecting the observation results. The liquid delivery channel 33 penetrates through the fixing plate 122 and is connected to the liquid storage bag 121, responsible for delivering the compressed soap liquid to the soap film tube 3. The side wall of the soap film tube 3 is provided with an air inlet pipe, and the air blown into the air inlet pipe forms a soap film in the soap film channel 32.

[0044] The support base 1 is provided with a material receiving table 13 on the upper surface, and a material receiving recess 131 is formed on the upper surface of the material receiving table 13, which is opposite to the bottom of the soap film tube 3. When the soap film tube 3 is disassembled, the internal residual soap liquid may leak out, which will contaminate the support base 1 or even the ground without proper measures. By setting the material receiving table 13 and the material receiving recess 131, the waste liquid can be effectively managed, the cleaning workload can be reduced, and the working area can be kept clean and orderly. At the same time, the design of the material receiving recess 131 needs to consider factors such as capacity and opening width, so that it can accommodate enough waste liquid and facilitate later cleaning and maintenance.

[0045] The pipe clamp 2 is fixed above the support base 1 and includes a bearing column 21 and a clamping ring 22 for stably placing the soap film tube 3. The bearing column 21 includes a fixed clamping column 211 and a movable clamping column 212, and the clamping ring 22 is composed of two semicircles respectively located on the movable clamping column 212 and the fixed clamping column 211. The upper surface of the support base 1 is provided with a sliding groove 14, and the bottom of the movable clamping column 212 can slide along the sliding groove 14. The bottom of the clamping column is provided with an adjustable telescopic rod 2121 which can pass through the movable clamping column 212 and is provided with a spring between the telescopic rod 2121 and the movable clamping column 212, so as to realize the telescopic effect. The end of the telescopic rod 2121 away from the movable clamping column 212 is connected with a movable rack 2122, and the side of the material receiving table 13 facing the bearing column 21 is provided with a fixed rack 132 matched with the movable rack 2122.

[0046] In actual use, when the telescopic rod 2121 is in the contracted state, the movable clamping column 212 can move along the sliding groove 14 on the surface of the support base 1, so as to change the distance between the two semicircles constituting the clamping ring 22, so that the clamping ring 22 can adapt to soap film tubes 3 of different sizes. When the telescopic rod 2121 is in the expanded state, the movable rack 2122 is engaged with the fixed rack, so as to limit the position of the movable clamping column 212. The position of the soap film is often captured by the human eye. During the movement of the soap film in the soap film tube 3, due to the inaccuracy of the scale captured by the human eye, the sensing device 221 is arranged on the clamping block. The sensing device 221 can sense the position of the soap film. The sensing device 221 can be a photoelectric sensor. When the soap film moves through the photoelectric sensor in the soap film tube 3, the light emitted by the emitting end is blocked, so that the light signal received by the receiving end changes. This change in light signal is converted into an electrical signal output. By detecting and analyzing the electrical signal, the position of the soap film is determined. The sensing device 221 can also use ultrasonic sensors and capacitive sensors.

[0047] In the present application, the surface of the support base 1 is provided with a monitoring screen for real-time display of system status and feedback information. The monitoring screen can use an OLED display screen or an LCD screen to display the motor position, speed or other key parameters. A manual control button is also provided beside the monitoring screen for directly operating the action of the motor or the actuator, for example, controlling the forward and reverse rotation or adjusting the position of the motor through the button. The inside of the support base 1 is also provided with a control system which can record the measurement results of the sensing device 221. The control system includes an action system and a timing system. The action system is used to receive instructions and control the action of the rudder or the actuator. The timing system can record the time taken by the soap film to move through the sensing device 221, so as to calculate the flow rate of the gas.

[0048] Please refer to Figure 4 , Figure 4Figure 1 is a sectional view of a soap film flowmeter according to the first embodiment of the present application. The soap film flowmeter 3 comprises a broken membrane portion 31, a soap film passage 32 and a liquid passage 33. The bottom of the broken membrane portion 31 is concave, and the maximum diameter of the broken membrane portion 31 is greater than that of the soap film passage 32 and the clamping ring 22, so as to prevent the soap film flowmeter 3 from falling off the clamping ring 22. In this embodiment, the broken membrane portion 31 is spherical, and the top of the soap film passage 32 extends beyond the bottom of the broken membrane portion 31. The top of the broken membrane portion 31 is provided with a gas outlet hole 311 which is in communication with the outside. When the soap film is broken, the soap solution will splash. The broken soap solution can splash to the side wall of the broken membrane portion 31 and then flow down along the side wall. This can prevent the soap solution from splashing out of the broken membrane portion 31 and polluting the working environment. The soap solution splashed to any part of the broken membrane portion 31 can flow down along the side wall of the broken membrane portion 31, thereby enhancing the backflow effect of the broken membrane portion 31. The connecting portion between the soap film passage 32 and the bottom of the broken membrane portion 31 is provided with a water permeation hole 321. When the soap solution submerges the water permeation hole 321, the soap solution can pass through the water permeation hole 321 and then flow down along the inner wall of the soap film passage 32, thereby further enhancing the wetting effect of the soap solution when flowing into the soap film passage 32.

[0049] The working principle of the first embodiment is as follows. Before using the soap film flowmeter, the user adjusts the position of the movable clamping column 212, so that the clamping ring 22 can cooperate with the outer wall of the soap film flowmeter 3, the broken membrane portion 31 of the soap film flowmeter 3 is carried on the clamping ring 22, the liquid storage bag 121 is connected to the liquid passage 33, and the squeezing control device 11 is adjusted. The soap solution is injected into the soap film flowmeter 3 through the gas outlet hole 311. The soap solution passes through the water permeation hole 321, thereby completely wetting the inner wall of the soap film flowmeter 3. At this time, the liquid storage bag 121 is in a compressed state. During the injection of the soap solution, the squeezing control device 11 is controlled to move slowly, so that the soap solution can completely fill the liquid storage bag 121. When using the soap film flowmeter, the squeezing control device is started to squeeze the liquid storage bag 121, thereby changing the liquid level of the soap solution in the soap film flowmeter 3. The bottom of the soap film flowmeter 3 is connected to an air inlet pipe. The air inlet pipe inputs gas, thereby forming a soap film. The soap film moves in the soap film flowmeter 3. Through the cooperation of the sensing device 221 and the control system, the measurement result is displayed on the monitoring screen.

[0050] Embodiment 2

[0051] Please refer to Figure 5 , Figure 5 Figure 2 is a sectional view of a soap film flowmeter according to the second embodiment of the present application. The soap film flowmeter 3 according to the second embodiment is basically the same as the soap film flowmeter 3 according to the first embodiment. The difference between the two is that the broken membrane portion 31 is funnel-shaped, the top edge of the broken membrane portion 31 extends vertically upward to form a water retaining edge 312, and the top of the water retaining edge 312 forms a water injection opening 3121.

[0052] In use, the soap solution can be directly poured into the soap film pipe 3 through the water injection opening 3121, and the water blocking edge 312 can prevent the soap solution from splashing out of the film breaking part 31. At the same time, the top of the water blocking edge 312 forms the water injection opening 3121, and the soap solution can be directly poured into the film breaking part 31 through the water injection opening 3121, thereby improving the water injection efficiency.

[0053] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An automatic soap film flow meter, characterized in that, include: The support base (1) is provided with a squeezing control device (11) and a soap liquid filling part (12) filled with soap liquid inside. The squeezing control device (11) can squeeze the soap liquid filling part (12). The squeezing distance and time interval of the squeezing control device (11) squeezing the soap liquid filling part (12) are controllable. A pipe clamp (2) is fixed to the upper surface of the support base (1). The pipe clamp (2) includes a bearing column (21) and clamping rings (22) located at both ends of the bearing column (21). The soap film tube (3) is supported by the clamping ring (22). The soap film tube (3) includes a film breaking part (31), a soap film channel (32), and an infusion channel (33). The bottom of the film breaking part (31) is concave. The maximum diameter of the film breaking part (31) is greater than the diameter of the soap film channel (32) and the diameter of the clamping ring (22). The infusion channel (33) is located at the bottom of the soap film channel (32) and communicates with the soap liquid filling part (12).

2. The automatic soap film flow meter according to claim 1, characterized in that: The top of the soap film channel (32) protrudes from the bottom of the film-breaking part (31), and the top of the film-breaking part (31) communicates with the outside.

3. An automatic soap film flow meter according to claim 2, characterized in that: The connection between the soap film channel (32) and the bottom of the film breaking part (31) is provided with a water seepage hole (321).

4. An automatic soap film flow meter according to claim 3, characterized in that: The bottom of the membrane breaking part (31) is spherical, and the top of the membrane breaking part (31) is provided with an air outlet (311).

5. An automatic soap film flow meter according to claim 3, characterized in that: The membrane breaking section (31) is funnel-shaped, and the top edge of the membrane breaking section (31) extends vertically upward to form a water-blocking edge (312), and the top of the water-blocking edge (312) forms a water injection opening (3121).

6. An automatic soap film flow meter according to claim 1, characterized in that: The soap filling part (12) includes a liquid storage bladder (121) and a fixing plate (122) fixed to one end of the liquid storage bladder (121). The fixing plate (122) is vertically fixed to the bottom surface of the inner cavity of the support base (1). The liquid storage bladder (121) is columnar and is an elastic body. An elastic element (1211) is provided inside the liquid storage bladder (121). The infusion channel (33) passes through the fixing plate (122) and communicates with the liquid storage bladder (121). The squeezing control device (11) squeezes the end of the liquid storage bladder away from the fixing plate (122).

7. An automatic soap film flow meter according to claim 6, characterized in that: The extrusion control device (11) includes an extrusion plate (111), a drive control component (112), and a drive screw (113) connected to the drive control component (112), wherein the drive screw (113) passes through the extrusion plate (111).

8. An automatic soap film flow meter according to claim 1, characterized in that: The upper surface of the support base (1) is provided with a receiving platform (13), and the upper surface of the receiving platform (13) is provided with a receiving recess (131). The infusion channel (33) passes through the middle of the receiving recess (131), and the receiving recess (131) is directly opposite the bottom of the soap film tube (3).

9. An automatic soap film flow meter according to claim 8, characterized in that: The bearing column (21) includes a movable clamping column (212) and a fixed clamping column (211). The clamping ring (22) is composed of two semicircles located on the movable clamping column (212) and the fixed clamping column (211) respectively. The upper surface of the support base (1) is provided with a sliding groove (14). The movable clamping column (212) can slide along the sliding groove (14). The bottom of the movable clamping column (212) is fixed with a telescopic rod (2121) that can adjust the length. The end of the telescopic rod (2121) away from the movable clamping column (212) is connected to a movable rack (2122). The receiving platform (13) facing the bearing column (21) is provided with a fixed rack (132) that cooperates with the movable rack (2122).

10. An automatic soap film flow meter according to claim 9, characterized in that: A sensing device (221) is fixed on the clamping ring (22), and the sensing device (221) can sense the position of the soap film.

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