A commutator and method for realizing gas-liquid dual-flow control

Abstract

This invention discloses a commutator and method for realizing gas-liquid dual-flow control. The commutator includes an air inlet, a nozzle, a sealing cover, a water distributor, an outer tank of the water distributor, a make-up air control valve, and a sealing flap. By adding components such as the sealing flap, sealing cover, and air inlet, and further improving the structure of the adjustable nozzle, this invention greatly improves the sealing performance and detection accuracy of the commutator.

Description

Technical Field

[0001] This invention relates to the field of water flow commutator technology, specifically to a commutator and method that can realize gas-liquid dual-flow control. Background Technology

[0002] A water flow meter is the main device for verifying and calibrating a flow meter, and the commutator is one of the core components of the water flow meter. Its function is to change the direction of water flow; whether the water flows into the bypass pipe or the weighing container is entirely controlled by the commutator. Specifically, as follows... Figure 1 As shown, when the water flow device is calibrating the flow meter, the water flow enters the weighing container 200 through the reversing device 100. When the reversing device 100 is started, the timing and frequency counter is started simultaneously to record the output signal of the flow meter under test. After entering the weighing container 200 for a period of time, the water flow returns to the bypass pipe 300 through the reversing device 100 and finally returns to the water storage tank 400. When the reversing device 100 is started, the timing and frequency counter is stopped simultaneously to record the output signal of the flow meter under test. The mass obtained by the weighing system is compared with the mass calculated by the number of output pulses of the flow meter under test, and finally the error value of the flow meter under test is obtained.

[0003] There are currently two main types of commutators: open commutators and closed commutators.

[0004] Traditional open-type commutators are mainly used in cold water flow devices, and are the most widely used and mature type. Their structure mainly consists of several parts, such as the upstream pipe 101, nozzle 102, flow guide 103, water distributor 104, drive unit 105, and weighing container 106. Figure 2 As shown. Open commutators have largely similar structures, and their drive devices are currently mainly of two types: one uses a cylinder, and the other uses a stepper motor. When commutation is required, the drive device pushes the nozzle to swing or pushes the water distributor to swing, thereby controlling whether the water flows into the bypass pipe or the weighing container. The main disadvantages of open commutators are that they are not suitable for volatile experimental media, such as high-temperature water or light oil, and the nozzle opening is not adjustable, affecting the uncertainty level. They also prevent the commutator from adjusting the pipe flow rate or pressure.

[0005] Traditional closed-type commutators are mainly used for high-temperature water and volatile media. Because open-type commutators allow the media to evaporate, significantly affecting measurement results, closed-type commutators are preferred for high-temperature media. Traditional closed-type commutators have a piston-cylinder-like structure; the commutator relies on the movement of a piston within the cylinder to switch the water flow direction. The commutation section of the commutator is not connected to the atmosphere. The states of the closed-type commutator before and during testing are as follows: Figure 3 and Figure 4 As shown. From Figure 3As can be seen, hot water returns to the water tank from the bypass pipe. During testing, the flow rate was already adjusted. At this point, switching the commutator direction instantly switches the hot water from the bypass pipe to the weighing container, as shown in the image. Figure 4 As shown. The main disadvantages of traditional closed-loop commutators are that the commutation process causes pressure fluctuations in the experimental fluid and has a low level of certainty, making them suitable only for low-accuracy devices.

[0006] Currently, there is a relatively new type of open-type closed-type commutator (Cai Bingxin. Research on Closed-Type Electric Commutator for Liquid Flow Device [D]. Tianjin University.). This is a modification of the open commutator, enclosing the original open structure within a closed space. This solves the problem of medium vapor leakage at the commutator in traditional open commutators. The main modification is to replace the upper end of the traditional commutator guide vane with a groove, and to add a cover plate to each side of the nozzle fixing plate, ensuring a tight seal between the groove and the upper end of the guide vane. When the liquid enters the weighing container, the gas in the weighing container gradually escapes; therefore, an vent hole is provided on the nozzle fixing plate, and an external pipe guides the gas to a suitable location. The distributor and the stepper motor shaft are connected via a coupling and a working shaft. The working shaft passes through the guide vane, and an oil seal is added to the original circular hole in the guide vane. The guide vane is lengthened and connected to the downstream pipeline to ensure the commutator remains sealed throughout the entire experimental setup. The main drawback of this design is that it lacks complete gas path management. Although it achieves isolation from the outside at the commutator, the bypass line and the line to weighing are always connected at the water distributor, and the medium vapor may cross between the two lines. The key issue of airtightness has not been resolved. In addition, its nozzle opening is not adjustable, which affects the uncertainty level and also makes it impossible for the commutator to adjust the pipeline flow or pressure.

[0007] Chinese patent application CN103438964A discloses a closed-type open commutator, comprising: a control box having components that provide power for commutation; a rotating disk located below the control box, the disk having several nozzles; a floating disk cooperating with the rotating disk, the floating disk having guide holes corresponding to the nozzles; and a water inlet pipe located at the center of the open commutator, with a flow divider cone disposed above the water inlet pipe. This cylindrical structure employs an open-closed design, solving the problem of air leakage between the bypass pipeline and the weighing container pipeline. It has advantages such as multiple nozzles, small size, and rotational commutation. However, this design is complex and difficult to manufacture; the seal is prone to problems, leading to water leakage. Furthermore, the nozzle opening is not adjustable, affecting the uncertainty level and preventing the commutator from adjusting the pipeline flow or pressure. Additionally, the air path is not thoroughly cleared, lacking a venting position, which can cause a vacuum negative pressure backflow of air.

[0008] Chinese patent application CN109579952A discloses an adjustable-opening commutator nozzle, which mainly improves upon the traditional open commutator by three aspects: 1. Optimized inlet pipe shape; 2. Adjustable nozzle opening, which is the most important aspect as it solves the problem of air ingress and improves uncertainty; 3. Replacing the traditional photoelectric switch with a grating ruler, making synchronization settings more flexible and accurate. However, this design lacks a sealing structure, making it unsuitable for volatile experimental media such as high-temperature water and light oil. Furthermore, although the nozzle opening is adjustable, the sealing pressure resistance of the moving part of the nozzle adjustment is low, making it impossible to regulate the pressure or flow rate of the experimental media. Summary of the Invention

[0009] In view of the shortcomings of the prior art, the present invention aims to provide a commutator and method that can realize gas-liquid dual-flow control.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A commutator capable of gas-liquid dual-flow control includes an air inlet, a nozzle, a sealing cover, a water distributor, an outer tank of the water distributor, a gas replenishment control valve, and a sealing flap. The top surface of the outer tank of the water distributor is sealed with a sealing cover, and the sealing cover has the air inlet. The air inlet is connected to the gas replenishment control valve via a gas replenishment pipeline. The nozzle penetrates the sealing cover and communicates with the interior of the outer tank of the water distributor. The outer tank of the water distributor contains a water distributor, which is internally divided by a partition into a bypass pipeline and an inlet pipeline, both of which are not interconnected. The lower part of the outer tank of the water distributor is provided with a second bypass pipe and a second inlet pipe, which correspond to the lower ends of the first bypass pipe and the first inlet pipe, respectively. The water distributor can swing left and right to make the first bypass pipe or the first inlet pipe align with the outlet of the nozzle, but the first bypass pipe and the first inlet pipe always correspond to the second bypass pipe and the second inlet pipe, respectively. The lower ends of the second bypass pipe and the second inlet pipe are provided with a sealing flap and a flap driving mechanism. The flap driving mechanism can drive the sealing flap to flip to seal or open the lower ends of the corresponding second bypass pipe or the second inlet pipe.

[0012] Furthermore, the flip-plate driving mechanism is a cylinder, and the control system controls the flipping of the sealed flip plate through the cylinder.

[0013] Furthermore, the adjustable nozzle includes an upper pipe, a lower housing, an upper cover plate, a rotating shaft, movable side plates, and fixed side plates; the upper cover plate is provided on the top of the lower housing, and the lower end of the upper pipe is connected to and installed on the top surface of the upper cover plate and communicates with the lower housing; the nozzle is provided inside the lower housing, and the nozzle is a channel formed by two opposing movable side plates and two opposing fixed side plates. The upper end of the movable side plate is connected to the upper cover plate through the rotating shaft, and the upper end of the fixed side plate is fixedly connected to the upper cover plate, and the channel of the nozzle corresponds to the lower end of the upper pipe; the movable side plates on both sides are respectively connected to a driving mechanism, and the driving mechanism on both sides is used to drive the movable side plates on both sides to rotate in opposite directions; the upper end of the movable side plate is sealed to the bottom surface of the upper cover plate.

[0014] Furthermore, the top of the movable side plate is connected to the rotating shaft, the bottom surface of the upper cover plate is provided with a sealing plate, and the outer surface of the rotating shaft is in pressure contact with the sealing plate.

[0015] Furthermore, a sealing sleeve is fitted over the outside of the rotating shaft, and the sealing sleeve is in pressure contact with the sealing plate.

[0016] Furthermore, the adjustable nozzle also includes a lower base plate with a square opening. The square opening has wing-shaped sealing plates on both sides along the direction of movement of the movable side plate. The lower ends of the movable side plates pass between the wing-shaped sealing plates and fit tightly against them. There is a gap between the square opening and the wing-shaped sealing plates on both sides perpendicular to the direction of movement of the movable side plate, allowing the fixed side plate on the corresponding side to pass through and be sealed and fixed.

[0017] Furthermore, the outer tank of the water distributor is provided with a sealed viewing window, and a scraping device is provided on its inner side.

[0018] Furthermore, the top surface of the partition is positioned lower than the top surface of the water distributor.

[0019] The present invention also provides a method for using the above-mentioned commutator capable of gas-liquid dual-flow control, the specific process of which is as follows:

[0020] In the initial state, after the fluid enters the outer tank of the distributor from the nozzle, it flows into the bypass pipe inside the distributor and out through the second bypass pipe inside the outer tank of the distributor. At this time, the sealing flap at the lower end of the second inlet pipe is closed, and the position of the baffle in the distributor is 0. Since the entire outer tank of the distributor is sealed, when the fluid flows into the bypass pipe, it will also carry away some air. At this time, the air replenishment control valve opens, and the gas is replenished into the outer tank of the distributor from the air inlet.

[0021] When fluid needs to enter the weighing container, the sealing flaps at the lower end of the weighing container need to be opened first. After the weighing container is stable, the distributor starts to swing and the distributor baffle gradually approaches the nozzle. When the baffle rotates to the middle position of the nozzle, the timer is triggered to count.

[0022] When the distributor swings to the point where the nozzle and the inlet pipe correspond, all the fluid flows into the weighing container. The baffle gradually moves away from the nozzle until it stops moving. At this point, the sealing flap at the lower end of the bypass pipe is closed.

[0023] When the fluid has been in the weighing container for a predetermined time, the sealing flap at the lower end of the bypass pipe 2 needs to be opened first. The distributor will start to swing back. When the center line of the baffle and the nozzle are aligned, the timer will be triggered to stop counting. When the distributor swings back to the point where the nozzle and the bypass pipe 1 are aligned again, all the fluid will flow into the bypass pipe 1 until the baffle position returns to 0 and finally returns to the initial state.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. By setting a sealing flap, the flow of gas in the commutator and its downstream pipeline is controlled in the two states of commutator input and output. This can prevent cross-contamination between the bypass pipeline and the inlet pipeline, achieve sealing and airflow control, and ensure that the entire outer tank of the water distributor is completely sealed and the internal state is stable.

[0026] 2. When water enters the weighing pipeline or bypass pipeline, a vacuum effect is created inside the commutator because the commutator is a sealed structure. By setting up air inlets and air inlets, liquid phase medium vapor can be guided into the commutator to ensure a stable liquid phase concentration inside the commutator.

[0027] 3. The sealing cover prevents the leakage of introduced medium vapor, and the transparent sealing cover allows for easy inspection of the commutator's internal condition at any time.

[0028] 4. By setting up a viewing window, it is easy to observe the internal condition of the commutator;

[0029] 5. The nozzle opening is adjustable and has good sealing performance, preventing the leakage of volatile media such as steam. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the principle of an existing water flow device;

[0031] Figure 2 A schematic diagram of a traditional open commutator;

[0032] Figure 3 This is a schematic diagram of the structure of a traditional closed-loop commutator before testing;

[0033] Figure 4 This is a schematic diagram of the structure of a traditional closed commutator during testing;

[0034] Figure 5 This is a schematic diagram of the commutator structure according to an embodiment of the present invention;

[0035] Figure 6 This is a side view of the adjustable nozzle according to an embodiment of the present invention.

[0036] Figure 7 This is a bottom view of the adjustable nozzle according to an embodiment of the present invention (with the movable side plate separated);

[0037] Figure 8 This is an isometric view of the airfoil sealing plate according to an embodiment of the present invention.

[0038] Figure 9 This is a schematic diagram of the operation of the commutator in this embodiment of the invention when it is running through a bypass pipeline;

[0039] Figure 10 This is a schematic diagram of the commutator during the commutation process according to an embodiment of the present invention;

[0040] Figure 11 This is a schematic diagram of the commutator of this invention when it enters the weighing pipeline. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings. It should be noted that this embodiment is based on the present technical solution and provides detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to this embodiment.

[0042] This embodiment provides a commutator capable of achieving gas-liquid dual-flow control, such as... Figure 5As shown, the device includes an air inlet 1, an adjustable nozzle 2, a sealing cover 3, a water distributor 4, an outer tank of the water distributor 5, an air replenishment control valve 7, and a sealing flap 9. The top surface of the outer tank of the water distributor 5 is sealed with a sealing cover 3, on which the air inlet 1 is located. The air inlet 1 is connected to the air replenishment control valve 7 via an air replenishment pipe. The adjustable nozzle 2 penetrates the sealing cover 3 and communicates with the interior of the outer tank of the water distributor 5. The outer tank of the water distributor 5 contains the water distributor 4, which has two separate bypass pipes 41 and 42. The lower part of the outer tank of the water distributor 5 has separate... The water distributor 4 can swing left and right to align the bypass pipe 41 or the inlet pipe 42 with the outlet of the adjustable nozzle 2, but the bypass pipe 41 and the inlet pipe 42 are always aligned with the bypass pipe 51 and the inlet pipe 52 respectively. The lower ends of the bypass pipe 41 and the inlet pipe 42 are equipped with sealing flaps 9 and flap driving mechanisms. The flap driving mechanisms can drive the sealing flaps 9 to flip to seal or open the lower ends of the corresponding bypass pipe 51 or inlet pipe 52.

[0043] The sealing flap is used to control the flow of gas within the commutator and its downstream pipelines during both the commutator input and output states. Its core function is to prevent cross-contamination of gas between the bypass pipeline and the inlet pipeline. Furthermore, the sealing flap requires a flap drive mechanism to control its opening and closing, ensuring that the sealing flap is open when water flows into the corresponding pipeline, thus not obstructing water flow. The sealing flap achieves both sealing and airflow control, ensuring the entire outer tank of the distributor is completely sealed and its internal state remains stable.

[0044] In this embodiment, the flip-plate driving mechanism is a cylinder 8, and the control system controls the flipping of the sealing flip plate through the cylinder 8.

[0045] It should be noted that when water enters the weighing pipe or bypass pipe, a vacuum effect is created inside the commutator because the commutator is a sealed structure. In this case, liquid phase vapor needs to be guided into the commutator through the air inlet to ensure a stable liquid phase concentration inside the commutator.

[0046] It should be noted that the outer tank of the distributor provides a seamless seal, ensuring a smooth flow of water into the pipeline. The sealing cap prevents introduced vapor from escaping. Furthermore, in this embodiment, the sealing cap is made of a transparent material, allowing for easy inspection of the commutator's internal structure. A scraping device can be installed on its inner side to prevent water vapor from adhering.

[0047] It should be noted that one-way sealing flaps are added to the bypass line and the inlet line to prevent air leakage between them, thus avoiding inaccurate liquid mass measurements. This ensures stable humidity inside the commutator and prevents negative pressure in the commutator cavity, which could allow air to enter and affect weighing accuracy.

[0048] In this embodiment, as Figure 6 As shown, the adjustable nozzle includes an upper pipe 21, a lower housing 22, an upper cover plate 23, a rotating shaft 25, movable side plates 26, and fixed side plates 213. The lower housing 22 has an upper cover plate 23 on its top. The lower end of the upper pipe 21 is connected to the top surface of the upper cover plate 23 and communicates with the lower housing 22. The lower housing 22 contains a nozzle, which is a channel formed by two opposing movable side plates 26 and two opposing fixed side plates 213. The upper end of the movable side plate 26 is connected to the upper cover plate 23 through the rotating shaft 25. The upper end of the fixed side plate 213 is fixedly connected to the upper cover plate 23, and the channel of the nozzle corresponds to the lower end of the upper pipe 21. The movable side plates 26 on both sides are respectively connected to a drive mechanism 28. The drive mechanism 28 on both sides is used to drive the movable side plates 26 on both sides to rotate in opposite directions. The upper end of the movable side plate 26 is sealed to the bottom surface of the upper cover plate 23.

[0049] Specifically, in this embodiment, the driving mechanism 28 is a telescopic cylinder. The telescopic cylinder's extension and retraction movement drives the movable side plates 26 on both sides to rotate in opposite directions.

[0050] Furthermore, in this embodiment, the top end of the movable side plate 26 is connected to the rotating shaft 25, and a sealing plate 24 is provided on the bottom surface of the upper cover plate 23. The outer surface of the rotating shaft 25 is in pressure contact with the sealing plate 24. By providing the sealing plate, a sealing structure can be formed between the movable side plate and the upper cover plate, preventing fluid from leaking from the gap between the rotating shaft and the bottom surface of the upper cover plate when it enters the nozzle.

[0051] Furthermore, in this embodiment, a sealing sleeve 29 is fitted over the outside of the rotating shaft 25, and the sealing sleeve 29 is in pressure contact with the sealing plate 24. By providing a sealing sleeve 29 over the outside of the rotating shaft 25, the sealing performance between the rotating shaft 25 and the upper cover plate 23 is further enhanced.

[0052] Furthermore, in this embodiment, both the sealing plate 24 and the sealing jacket 29 are made of fluororubber material.

[0053] In this embodiment, as Figure 6-8As shown, the adjustable nozzle also includes a lower base plate 27, on which a square opening 211 is provided. Airfoil sealing plates 210 are respectively provided on the two side walls of the square opening 211 along the movement direction of the movable side plate 26. The lower ends of the movable side plates 26 on both sides pass through the airfoil sealing plates 210 on both sides and fit tightly with the airfoil sealing plates 210 on both sides respectively. There is a gap 212 between the square opening 211 and the airfoil sealing plates 210 on both sides perpendicular to the movement direction of the movable side plate 26, so that the fixed side plate 213 on the corresponding side can pass through and be sealed and fixed.

[0054] The airfoil sealing plate is sealed and fitted with the movable side plates on both sides. When the movable side plates on both sides are at their maximum opening, the airfoil sealing plate on both sides is deformed by pressure. When the movable side plates on both sides move towards each other, the airfoil sealing plate on both sides still maintains a tight fit with the movable side plates under the potential energy of restoring its original shape, thereby ensuring that no volatile media such as steam will overflow when the movable side plates rotate.

[0055] It should be noted that the quality of the commutator's nozzle structure has a significant impact on the accuracy of the flow device. Therefore, how to improve the nozzle structure has been a long-standing research topic in the field of flow. In this embodiment, the nozzle opening can be adjusted by rotating the movable side plate. During nozzle opening adjustment, the movable side plate rotates a small angle around the pivot, and a movable sealing structure is formed between the upper cover plate and the movable side plate to prevent fluid leakage.

[0056] In this embodiment, the outer tank 5 of the water distributor is equipped with a sealed viewing window 6. The purpose of the viewing window 6 is to observe the internal condition of the commutator and to promptly resolve any problems found. A scraping device can also be installed on the inside of the viewing window to prevent water mist from adhering.

[0057] In this embodiment, the water distributor 4 is internally equipped with a partition 13, which divides the interior of the water distributor 4 into two non-communicating bypass pipes 41 and inlet pipes 42. The top surface of the partition 13 is lower than the top surface of the water distributor 4. When the water distributor 4 switches water paths by swinging, and the outlet of the adjustable nozzle 2 corresponds to the top surface of the partition 13, water will not splash out of the water distributor 4 because the top surface of the partition 13 is lower than the top surface of the water distributor 4.

[0058] In this embodiment, the control system controls the swing of the water distributor 4 by rotating the drive mechanism (motor or cylinder).

[0059] The following section will further detail the entire commutation input and output process of the commutator.

[0060] 1) Initial state as follows Figure 9As shown, after the fluid enters the outer tank of the distributor from the nozzle, it flows into the bypass pipe inside the distributor and out through the second bypass pipe inside the outer tank of the distributor. At this time, the sealing flap at the lower end of the second inlet pipe is closed, and the position of the baffle in the distributor is 0. Since the entire outer tank of the distributor is sealed, when the fluid flows into the bypass pipe, it will also carry away some air. At this time, the air replenishment control valve opens, and steam is replenished into the outer tank of the distributor from the air inlet.

[0061] 2) When fluid needs to enter the weighing container, the sealing flaps at the lower end of the inlet container must first be opened. Once the weighing container is stable, the distributor begins to swing, and the distributor baffle gradually approaches the nozzle. When the baffle reaches the center position of the nozzle, the timer is triggered to count. Figure 10 As shown;

[0062] 3) When the distributor swings until the nozzle and the inlet pipe align, all fluid flows into the weighing container, and the baffle gradually moves away from the nozzle until it stops moving. At this point, the sealing flap at the lower end of the bypass pipe is closed; Figure 11 As shown;

[0063] 4) After the predetermined time has elapsed since the fluid entered the weighing container, the sealing flap at the lower end of bypass pipe two needs to be opened first. The distributor will then begin to swing back. When the center line of the baffle and the nozzle aligns, the timer will be triggered to stop counting. When the distributor swings back until the nozzle and bypass pipe one align again, all the fluid will flow into bypass pipe one until the baffle returns to the 0 position, and finally back to the weighing container. Figure 9 The initial state is shown.

[0064] For those skilled in the art, various corresponding changes and modifications can be made based on the above technical solutions and concepts, and all such changes and modifications should be included within the protection scope of the claims of this invention.

Claims

1. A commutator capable of realizing gas-liquid dual-flow control, characterized in that, The system includes an air inlet, an adjustable nozzle, a sealing cover, a water distributor, an outer tank of the water distributor, an air replenishment control valve, and a sealing flap. The top surface of the outer tank of the water distributor has a sealing cover, on which the air inlet is located. The air inlet is connected to the air replenishment control valve via an air replenishment pipe. The adjustable nozzle penetrates the sealing cover and communicates with the interior of the outer tank of the water distributor. The outer tank of the water distributor contains a water distributor, which is internally divided by a partition into two non-interconnected bypass pipes and an inlet pipe. The lower part of the outer tank of the water distributor is equipped with... There are two bypass pipes, one for bypass pipe one and one for weighing pipe one, respectively, corresponding to the lower ends of bypass pipe one and weighing pipe one. The water distributor can swing left and right to align bypass pipe one or weighing pipe one with the outlet of the adjustable nozzle, but bypass pipe one and weighing pipe one always correspond to bypass pipe two and weighing pipe two, respectively. The lower ends of bypass pipe two and weighing pipe two are provided with sealing flaps and flap driving mechanisms. The flap driving mechanism can drive the sealing flaps to flip to seal or open the lower ends of the corresponding bypass pipe two or weighing pipe two. The adjustable nozzle includes an upper pipe, a lower housing, an upper cover plate, a rotating shaft, movable side plates, and fixed side plates. The upper cover plate is located on the top of the lower housing, and the lower end of the upper pipe is connected to and installed on the top surface of the upper cover plate, communicating with the lower housing. The nozzle is located inside the lower housing; the nozzle is a channel formed by two opposing movable side plates and two opposing fixed side plates. The upper ends of the movable side plates are connected to the upper cover plate via a rotating shaft, and the upper ends of the fixed side plates are fixedly connected to the upper cover plate. The channel of the nozzle corresponds to the lower end of the upper pipe. The movable side plates on both sides are respectively connected to a driving mechanism, which drives the movable side plates to rotate in opposite directions. The upper ends of the movable side plates are sealed to the bottom surface of the upper cover plate.

2. The commutator capable of realizing gas-liquid dual-flow control according to claim 1, characterized in that, The flip-plate drive mechanism uses a cylinder, and the control system controls the flipping of the sealed flip plate through the cylinder.

3. The commutator capable of realizing gas-liquid dual-flow control according to claim 1, characterized in that, The top of the movable side plate is connected to the rotating shaft, and a sealing plate is provided on the bottom surface of the upper cover plate. The outer surface of the rotating shaft is in pressure contact with the sealing plate.

4. The commutator capable of realizing gas-liquid dual-flow control according to claim 3, characterized in that, The rotating shaft is fitted with a sealing sleeve, which is in pressure contact with the sealing plate.

5. The commutator capable of realizing gas-liquid dual-flow control according to claim 1, characterized in that, The adjustable nozzle also includes a lower base plate with a square opening. The square opening has wing-shaped sealing plates on both sides along the direction of movement of the movable side plate. The lower ends of the movable side plates pass between the wing-shaped sealing plates and fit tightly with them. There is a gap between the square opening and the wing-shaped sealing plates on both sides perpendicular to the direction of movement of the movable side plate, allowing the fixed side plate on the corresponding side to pass through and be sealed and fixed.

6. The commutator capable of realizing gas-liquid dual-flow control according to claim 1, characterized in that, The outer tank of the water distributor is equipped with a sealed viewing window, and a scraping device is installed on its inner side.

7. The commutator capable of realizing gas-liquid dual-flow control according to claim 1, characterized in that, The top surface of the partition is lower than the top surface of the water distributor.

8. A method for realizing gas-liquid dual-flow control using a commutator as described in any one of claims 1-7, characterized in that, The specific process is as follows: In the initial state, after the fluid enters the outer tank of the distributor through the adjustable nozzle, it flows out through the bypass pipe inside the distributor and out through the second bypass pipe inside the outer tank. At this time, the sealing flap at the lower end of the second inlet pipe is closed, and the position of the baffle in the distributor is 0. Since the entire outer tank of the distributor is sealed, when the fluid flows into the bypass pipe, it will also carry away some air. At this time, the air replenishment control valve opens, and the gas is replenished into the outer tank of the distributor through the air inlet. When fluid needs to enter the weighing container, the sealing flap at the lower end of the weighing container needs to be opened first. After the weighing container is stable, the distributor starts to swing. The distributor baffle gradually approaches the adjustable nozzle. When the baffle rotates to the middle position of the adjustable nozzle, the timer is triggered to count. When the water distributor swings to the point where the adjustable nozzle and the inlet pipe correspond, all the fluid flows into the weighing container. The baffle gradually moves away from the adjustable nozzle until it stops moving. At this point, the sealing flap at the lower end of the bypass pipe is closed. When the fluid has been in the weighing container for the predetermined time, the sealing flap at the lower end of the bypass pipe 2 needs to be opened first. The distributor will start to swing back. When the center line of the baffle and the adjustable nozzle is aligned, the timer will be triggered to stop counting. When the distributor swings back to the point where the adjustable nozzle and the bypass pipe 1 are aligned again, all the fluid will flow into the bypass pipe 1 until the baffle returns to the 0 position and finally returns to the initial state.

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