A device and method for detecting gas-liquid two-phase flow rate in a microtube

Abstract

The invention relates to the technical field of flow detection, and discloses a detection device and method for the flow of gas-liquid two-phase flow in a microtube, comprising a separation mechanism, wherein the separation mechanism also comprises a main body, an annular plate is fixedly connected to the inner wall of the main body, an inlet pipe is fixedly connected to the left side of the main body, and a liquid outlet pipe is fixedly connected to the right side of the main body; after the fluid flows into the top of the spiral plate, the fluid flows downward along the spiral plate, and the fluid is affected by centrifugal force and centripetal force during the flow process, so that the flow velocity changes; the fluid is affected by the centrifugal force, and the liquid with higher density is thrown to the outside, while the gas with lower density is concentrated in the central area; as the liquid in the fluid continuously flows downward, it will flow into the liquid outlet pipe through a through groove under the influence of gravity, so that the liquid in the fluid can be separated; by measuring separately after separation, mutual interference between the gas-liquid two-phase flows can be avoided, and the accuracy of the measurement result can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of flow detection, and in particular to a device and method for detecting the flow of gas-liquid two-phase flow in a microtube. Background Art

[0002] Gas-liquid two-phase flow is widely used in industrial production projects such as petroleum, chemical industry, energy, and electric power. Accurately measuring its parameters is of great significance for safety, environmental protection, control, and energy saving. Since gas-liquid two-phase flow is not only much more complicated than single-phase flow in terms of flow characteristics, but also has interface effects and relative velocities between phases, parameter detection is more difficult. Therefore, a large number of scientific researchers from all over the world have done a lot of research work.

[0003] The distribution of gas and liquid phases in gas-liquid two-phase flow is usually uneven. It is difficult to accurately determine the proportion and distribution of each phase without separation detection, which may lead to a large deviation between the measurement results and the actual flow rate, and the detection accuracy is prone to inaccurate. To address the above problems, the following solutions are proposed. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a detection device for gas-liquid two-phase flow rate in a microtube, comprising a separation mechanism, the separation mechanism also comprising a main body, an annular plate is fixedly connected to the inner wall of the main body, an inlet pipe is fixedly connected to the left side of the main body, and a liquid outlet pipe is fixedly connected to the right side of the main body;

[0005] The detection mechanism, the top of the main body is fixedly connected with a top plate, the top of the top plate is fixedly connected with an air outlet pipe, the air outlet pipe passes through the top plate and is fixedly connected to the top plate, and the bottom of the air outlet pipe is fixedly connected with an air inlet cover;

[0006] The protective mechanism comprises a bottom plate fixedly connected to the bottom of the main body, a second cylinder fixedly connected to the top of the bottom plate, and a push plate slidably connected to the inner wall of the second cylinder.

[0007] Preferably, the separation mechanism also includes a cylinder 1 fixedly connected to the bottom of the annular plate, a spiral plate fixedly connected to the outer wall of the cylinder 1, a rectangular baffle 1 fixedly connected to the top of the spiral plate, a rectangular baffle 2 fixedly connected to the top of the spiral plate, and a collecting plate fixedly connected to the inner wall of the main body, and the top of the collecting plate is fixedly connected to the bottom of the spiral plate. When it is necessary to detect the flow rate of the fluid, the fluid flows into the top of the spiral plate through the inlet pipe, and the fluid is affected by the spiral setting of the spiral plate. The upper part of the spiral plate is wide and the lower part is narrow. After the fluid flows into the top of the spiral plate, the fluid flows downward along the spiral plate. The fluid will be affected by centrifugal force and centripetal force during the flow process, thereby changing the flow rate. The fluid is affected by the centrifugal force, and the liquid with higher density is thrown to the outside, while the gas with lower density is concentrated in the central area. As the liquid in the fluid continues to flow downward, it will flow into the liquid outlet pipe through the through groove under the influence of gravity. In this way, the liquid in the fluid can be separated, and the fluid with lower density will be concentrated in the central area.

[0008] Preferably, the separation mechanism further comprises a spiral baffle fixedly connected to the top of the spiral plate, a plurality of filter holes are formed on the outer wall of the spiral baffle, and a through groove is formed on the outer wall of the collecting plate. When the fluid flows along the trajectory of the spiral plate, the flow rate will increase. The fluid is doped with impurities. When the fluid doped with impurities flows rapidly, the impurities in the fluid will contact the inner wall of the main body. The impurities are affected by the rapid flow of the fluid and will also quickly collide with the inner wall of the main body. When the fluid flows into the top of the spiral plate through the inlet pipe, it is blocked by the rectangular baffle, so that the incoming fluid flows into the spiral baffle and the circular Between cylinder one, as the flow rate of the fluid increases, the liquid in the fluid will be thrown out to the outer side of the spiral baffle through several filter holes, and the impurities in the fluid will remain between cylinder one and the spiral baffle, and the remaining impurities will fall on the top of the collecting plate due to gravity, so that the impurities can be separated from the fluid, and the impurities can be prevented from wearing the inner wall of the main body when the impurities flow quickly. The impurities can be separated from the liquid of the fluid. When the flow meter for detecting the fluid detects the liquid, the impurities in the fluid can be prevented from affecting the flow detection meter, thereby improving the stability of the device in detecting the liquid in the fluid.

[0009] Preferably, the detection mechanism also includes a rotating plate rotatably connected to the inner wall of the air inlet hood, a rotating shaft is fixedly connected to the side wall of the rotating plate, one end of the rotating shaft away from the rotating plate extends to the outside of the air inlet hood and is rotatably connected to the air inlet hood, and a detector is fixedly connected to the top of the annular plate. As more gas continues to rise, the gas between the top plate and the annular plate will exert an extrusion force on the rotating plate, forcing the rotating plate to swing at the inner wall of the air inlet hood. After the rotating plate swings, a gap is generated between the rotating plate and the air inlet hood, and the gas between the top plate and the annular plate will enter the outlet pipe through the gap. When the flow rate in the two-phase flow is large, the swing amplitude of the rotating plate will increase, and then the gap between the rotating plate and the air inlet hood will also increase. The rotating plate can drive the rotating shaft to swing when swinging, and the detector detects the swing amplitude of the rotating shaft.

[0010] Preferably, the detection mechanism also includes two slide grooves opened on the inner wall of the bottom of the air intake hood, with sliders slidably connected in the two slide grooves, and extrusion springs are fixedly connected to the side walls of the two sliders. The ends of the two extrusion springs away from the sliders are fixedly connected to the inner walls of the two slide grooves, and the tops of the two sliders are rotatably connected to strip plates, and the sides of the two strip plates away from the sliders are rotatably connected to the side walls of the rotating plates. When the swing amplitude of the rotating shaft is greater, the flow rate of the fluid is greater. When the flow rate becomes smaller, the extrusion force on the extrusion spring will be released, and the swing amplitude of the rotating plate can be automatically adjusted according to the flow rate. This dynamic response can provide real-time feedback on changes in fluid flow, provide timely information for flow detection, and improve the accuracy and reliability of flow detection by the device.

[0011] Preferably, the detection mechanism also includes a support frame fixedly connected to an inner wall of the cylinder, the top of the support frame is fixedly connected to a drive motor, and the support frame is rotatably connected to a fan blade on a side away from the drive motor, the fan blade passes through the support frame and is fixedly connected to an output shaft of the drive motor, and the drive motor is started, and the drive motor drives the fan blade to rotate. After the fan blade rotates, the gas concentrated in the middle area is forced to rise. After the fan blade rotates and forces the gas in the fluid to rise, the gas in the fluid can be separated from the liquid. When the gas and liquid two-phases flow in a mixed state, the difference in physical properties of the gas and liquid will cause mutual interference, affecting the accuracy of the flow measurement. By measuring separately after separation, mutual interference between the gas-liquid two-phase flows can be avoided, thereby improving the accuracy of the measurement results.

[0012] Preferably, the protection mechanism also includes a buffer spring fixedly connected to the bottom of the push plate, one end of the buffer spring away from the push plate is fixedly connected to the bottom plate, one side of the push plate away from the buffer spring is fixedly connected to a sliding rod, one end of the sliding rod away from the push plate extends to the outside of the cylinder 2 and is slidably connected to the cylinder 2, one end of the sliding rod away from the push plate is fixedly connected to a buffer plate, and the bottom of the collecting plate is fixedly connected to an arc plate. When the fluid enters the liquid outlet pipe through the through groove, the fluid at this time is still in a high-speed flow state and directly hits the liquid outlet pipe, which will cause damage to the liquid outlet pipe. By providing a buffer plate, the shape of the buffer plate is an arc-shaped setting, which can change the direction of liquid flow. After the fluid hits the buffer plate, it flows along the arc surface of the buffer plate, causing the movement trajectory of the fluid to bend. This reduces the speed of the fluid and prevents the fast-flowing fluid from directly hitting the outer wall of the liquid outlet pipe. When the fluid hits the buffer plate, the buffer plate will be subjected to impact force. After the buffer plate is impacted, the buffer plate will drive the sliding rod and the push plate to move downward. After the push plate moves downward, it applies an extrusion force to the buffer spring. The buffer spring can absorb part of the impact force. The combination of the buffer plate and the buffer spring can make the flow of the fluid more stable. After the high-speed flowing fluid hits the buffer plate, the speed is reduced and the flow becomes smoother. At the same time, the elastic effect of the buffer spring can absorb the fluctuation energy of the fluid and further reduce the unstable factors of the fluid. When the fluid after buffering flows to the arc plate, the arc setting of the arc plate changes the direction of the liquid and guides the liquid into the liquid outlet pipe.

[0013] A method for using a device for detecting the flow rate of a gas-liquid two-phase flow in a microtube comprises the following steps:

[0014] S1: After the fluid flows into the top of the spiral plate, it flows downward along the spiral plate. During the flow, the fluid is affected by centrifugal force and centripetal force, which changes the flow velocity. Under the action of centrifugal force, the liquid with higher density is thrown to the outside, while the gas with lower density is concentrated in the center area.

[0015] S2: When the fan blades rotate and drive the gas upward, the gas enters between the top plate and the annular plate. As more gas continues to rise, the gas between the top plate and the annular plate exerts a squeezing force on the rotating plate, forcing the rotating plate to swing on the inner wall of the air inlet hood;

[0016] S3: When the fluid flows into the top of the spiral plate through the inlet pipe, it is blocked by the rectangular baffle 1, so that the incoming fluid flows into the space between the spiral baffle and the cylinder 1. As the flow rate of the fluid increases, the liquid in the fluid will be thrown out through several filter holes to the outer side of the spiral baffle;

[0017] S4: The buffer plate has an arc-shaped shape, which can change the direction of liquid flow. After the fluid hits the buffer plate, it flows along the arc-shaped surface of the buffer plate, causing the movement trajectory of the fluid to bend, thereby reducing the speed of the fluid and preventing the fast-flowing fluid from directly hitting the outer wall of the liquid outlet pipe.

[0018] The present invention has the following beneficial effects:

[0019] When the flow rate of the fluid needs to be detected in the present invention, the fluid flows into the top of the spiral plate through the inlet pipe. The fluid is subjected to the spiral setting of the spiral plate. The upper part of the spiral plate is wide and the lower part is narrow. After the fluid flows into the top of the spiral plate, the fluid flows downward along the spiral plate. The fluid is subjected to the effects of centrifugal force and centripetal force during the flow process, thereby changing the flow rate. The fluid is subjected to the effects of centrifugal force, and the liquid with higher density is thrown outward, while the gas with lower density is concentrated in the central area. As the liquid in the fluid continuously flows downward, it will flow into the liquid outlet pipe through the through groove under the influence of gravity, so that the liquid in the fluid can be separated, while the fluid with lower density will be concentrated in the central area. At this time, the driving motor is started, and the driving motor drives the fan blades to rotate. After the fan blades rotate, the gas concentrated in the middle area is forced to rise. After the fan blades rotate and force the gas in the fluid to rise, the gas in the fluid can be separated from the liquid. When the gas-liquid two-phase mixed flow, the difference in physical properties of the gas and the liquid will cause mutual interference, affecting the accuracy of the flow measurement. By measuring separately after separation, mutual interference between the gas-liquid two-phase flow can be avoided, and the accuracy of the measurement result can be improved.

[0020] When the fan blades of the present invention rotate and drive the gas to rise, the gas enters between the top plate and the annular plate. As more gas continues to rise, the gas between the top plate and the annular plate will exert an extrusion force on the rotating plate, forcing the rotating plate to swing at the inner wall of the air inlet hood. After the rotating plate swings, a gap is generated between the rotating plate and the air inlet hood. When the rotating plate swings, the slider is squeezed by the strip plate to slide in the slide groove. At this time, the slider exerts an extrusion force on the extrusion spring, and the gas between the top plate and the annular plate enters the outlet pipe through the gap. When the flow rate in the two-phase flow is large, the swing amplitude of the rotating plate will increase, and then the gap between the rotating plate and the air inlet hood will also increase. When the rotating plate swings, it can drive the rotating shaft to swing. The detector detects the swing amplitude of the rotating shaft. When the swing amplitude of the rotating shaft is larger, the flow rate of the fluid is larger. When the flow rate becomes smaller, the extrusion force exerted on the extrusion spring will be released, and the swing amplitude of the rotating plate can be automatically adjusted according to the size of the flow rate. This dynamic response can feedback the change of the fluid flow rate in real time, provide timely information for flow detection, and provide the accuracy and reliability of the flow detection of the device.

[0021] When the fluid of the present invention flows along the trajectory of the spiral plate, the flow rate will increase. Impurities are doped in the fluid. When the fluid doped with impurities flows rapidly, the impurities in the fluid will contact the inner wall of the main body. The impurities are affected by the rapid flow of the fluid and will also quickly collide with the inner wall of the main body. When the fluid flows into the top of the spiral plate through the inlet pipe, it is blocked by the rectangular baffle one, so that the incoming fluid flows into between the spiral baffle and the cylinder one. As the flow rate of the fluid increases, the liquid in the fluid will be thrown out to the outer position of the spiral baffle through a plurality of filter holes, while the impurities in the fluid will remain between the cylinder one and the spiral baffle. The remaining impurities will fall on the top of the collecting plate due to gravity, so that the impurities can be separated from the fluid, and the impurities can be prevented from causing wear to the inner wall of the main body when the fluid flows rapidly. The impurities are separated from the liquid of the fluid. When the flow meter for detecting the fluid detects the liquid, the impurities in the fluid can be prevented from affecting the flow detector, thereby improving the stability of the device for detecting the liquid in the fluid.

[0022] When the fluid of the present invention enters the liquid outlet pipe through the through groove, the fluid is still in a high-speed flow state at this time, and directly hits the liquid outlet pipe, which will cause damage to the liquid outlet pipe. By providing a buffer plate, the shape of the buffer plate is an arc-shaped setting, such a setting can change the direction of liquid flow. After the fluid hits the buffer plate, it flows along the arc surface of the buffer plate, so that the movement trajectory of the fluid is bent, thereby reducing the speed of the fluid and avoiding the fast-flowing fluid from directly hitting the outer wall of the liquid outlet pipe. When the fluid hits the buffer plate, the buffer plate will be subjected to impact force. After the buffer plate is impacted, the buffer plate will drive the slide bar and the push plate to move downward. After the push plate moves downward, an extrusion force is applied to the buffer spring, and the buffer spring can absorb part of the impact force. The combination of the buffer plate and the buffer spring can make the flow of the fluid more stable. After the high-speed flowing fluid hits the buffer plate, the speed is reduced and the flow becomes more stable. At the same time, the elastic action of the buffer spring can absorb the fluctuation energy of the fluid, further reducing the unstable factors of the fluid. When the fluid after buffering flows to the arc plate, it is affected by the arc setting of the arc plate, which changes the direction of the liquid and guides the liquid into the liquid outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0024] Figure 1 It is a schematic cross-sectional view of the overall structure of the present invention;

[0025] Figure 2It is a partial structural schematic diagram of the separation mechanism of the present invention;

[0026] Figure 3 It is a schematic diagram of the detection mechanism of the present invention;

[0027] Figure 4 For the present invention Figure 3 A is an enlarged schematic diagram;

[0028] Figure 5 It is a schematic diagram of the internal components in the separation mechanism of the present invention;

[0029] Figure 6 It is a cross-sectional schematic diagram of the protection mechanism of the present invention;

[0030] Figure 7 For the present invention Figure 6 A magnified schematic diagram of B;

[0031] Figure 8 It is a schematic diagram of the working process of the present invention.

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] In the figure: 1. separation mechanism; 101. main body; 102. annular plate; 103. inlet pipe; 104. liquid outlet pipe; 105. cylinder 1; 106. spiral plate; 107. rectangular baffle 1; 108. rectangular baffle 2; 109. collecting plate; 110. spiral baffle; 111. filter hole; 112. through groove; 2. detection mechanism; 201. top plate; 202. outlet pipe; 203. air inlet cover; 204, rotating plate; 205, rotating shaft; 206, detector; 207, slide groove; 208, slider; 209, extrusion spring; 210, strip plate; 211, support frame; 212, drive motor; 213, fan blade; 3, protection mechanism; 301, bottom plate; 302, cylinder 2; 303, push plate; 304, buffer spring; 305, slide rod; 306, buffer plate; 307, arc plate. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] For example, see Figure 1 - Figure 3The present invention is a detection device for gas-liquid two-phase flow rate in a microtube, comprising a separation mechanism 1, the separation mechanism 1 further comprising a main body 101, an annular plate 102 is fixedly connected to the inner wall of the main body 101, an inlet pipe 103 is fixedly connected to the left side of the main body 101, and a liquid outlet pipe 104 is fixedly connected to the right side of the main body 101;

[0036] Detection mechanism 2, the top of the main body 101 is fixedly connected with a top plate 201, the top of the top plate 201 is fixedly connected with an air outlet pipe 202, the air outlet pipe 202 passes through the top plate 201 and is fixedly connected to the top plate 201, and the bottom of the air outlet pipe 202 is fixedly connected with an air inlet cover 203;

[0037] The protection mechanism 3 has a bottom plate 301 fixedly connected to the bottom of the main body 101 , a second cylinder 302 fixedly connected to the top of the bottom plate 301 , and a push plate 303 slidably connected to the inner wall of the second cylinder 302 .

[0038] The separation mechanism 1 also includes a cylinder 105 fixedly connected to the bottom of the annular plate 102, a spiral plate 106 fixedly connected to the outer wall of the cylinder 105, a rectangular baffle 107 fixedly connected to the top of the spiral plate 106, a rectangular baffle 2 108 fixedly connected to the top of the spiral plate 106, a collecting plate 109 fixedly connected to the inner wall of the main body 101, the top of the collecting plate 109 is fixedly connected to the bottom of the spiral plate 106, when it is necessary to detect the flow of the fluid, the fluid flows into the top of the spiral plate 106 through the inlet pipe 103, and the fluid is subjected to the spiral design of the spiral plate 106. The upper part of the spiral plate 106 is wide and the lower part is narrow. After the fluid flows into the top of the spiral plate 106, the fluid flows downward along the spiral plate 106. The fluid is affected by centrifugal force and centripetal force during the flow, so that the flow rate changes. The fluid is affected by the centrifugal force, and the liquid with higher density is thrown to the outside, while the gas with lower density is concentrated in the central area. As the liquid in the fluid continues to flow downward, it will flow into the liquid outlet pipe 104 through the through groove 112 under the influence of gravity. In this way, the liquid in the fluid can be separated, and the fluid with lower density will be concentrated in the central area.

[0039] The separation mechanism 1 also includes a spiral baffle 110 fixedly connected to the top of the spiral plate 106. A plurality of filter holes 111 are provided on the outer wall of the spiral baffle 110. A through groove 112 is provided on the outer wall of the collecting plate 109. When the fluid flows along the trajectory of the spiral plate 106, the flow rate will increase. The fluid is doped with impurities. When the fluid doped with impurities flows rapidly, the impurities in the fluid will contact the inner wall of the main body 101. The impurities are affected by the rapid flow of the fluid and will also quickly hit the inner wall of the main body 101. When the fluid flows into the top of the spiral plate 106 through the inlet pipe 103, it is blocked by the rectangular baffle 107, so that the incoming fluid flows into the spiral plate 106. Between the baffle 110 and the cylinder 105, as the flow rate of the fluid increases, the liquid in the fluid will be thrown out to the outer side of the spiral baffle 110 through a plurality of filter holes 111, while the impurities in the fluid will remain between the cylinder 105 and the spiral baffle 110. The remaining impurities will fall on the top of the collecting plate 109 due to gravity, thereby separating the impurities from the fluid and preventing the impurities from causing wear to the inner wall of the main body 101 when the fluid flows rapidly. By separating the impurities from the liquid of the fluid, when the flow meter for detecting the fluid detects the liquid, the impurities in the fluid can be prevented from affecting the flow detector, thereby improving the stability of the device in detecting the liquid in the fluid.

[0040] For example 2, please refer to Figure 4 - Figure 8 The present invention is a detection device for the flow rate of gas-liquid two-phase flow in a microtube. On the basis of Example 1, the detection mechanism 2 also includes a rotating plate 204 rotatably connected to the inner wall of the air inlet hood 203, and a rotating shaft 205 is fixedly connected to the side wall of the rotating plate 204. The end of the rotating shaft 205 away from the rotating plate 204 extends to the outside of the air inlet hood 203 and is rotatably connected to the air inlet hood 203. The top of the annular plate 102 is fixedly connected to a detector 206. As more gas continues to rise, the gas between the top plate 201 and the annular plate 102 will exert a squeezing force on the rotating plate 204. The force forces the rotating plate 204 to swing at the inner wall of the air inlet hood 203. After the rotating plate 204 swings, a gap is generated between the rotating plate 204 and the air inlet hood 203, and the gas between the top plate 201 and the annular plate 102 enters the outlet pipe 202 through the gap. When the flow rate in the two-phase flow is large, the swing amplitude of the rotating plate 204 will increase, and then the gap between the rotating plate 204 and the air inlet hood 203 will also increase. The rotating plate 204 can drive the rotating shaft 205 to swing when swinging, and the detector 206 detects the swing amplitude of the rotating shaft 205.

[0041] The detection mechanism 2 also includes two slide grooves 207 opened on the inner wall at the bottom of the air intake hood 203, and sliders 208 are respectively slidably connected in the two slide grooves 207, and extrusion springs 209 are respectively fixedly connected to the side walls of the two slide grooves 207. The ends of the two extrusion springs 209 away from the sliders 208 are respectively fixedly connected to the inner walls of the two slide grooves 207, and the tops of the two sliders 208 are respectively rotatably connected with strip plates 210, and the sides of the two strip plates 210 away from the sliders 208 are both rotatably connected to the side walls of the rotating plate 204. When the swing amplitude of the rotating shaft 205 is greater, the flow rate of the fluid is greater. When the flow rate becomes smaller, the extrusion force exerted on the extrusion spring 209 will be released, and the swing amplitude of the rotating plate 204 can be automatically adjusted according to the size of the flow rate. This dynamic response can provide real-time feedback on the changes in the fluid flow rate, provide timely information for flow detection, and provide the device with accuracy and reliability in flow detection.

[0042] The detection mechanism 2 also includes a support frame 211 fixedly connected to the inner wall of the cylinder 105, the top of the support frame 211 is fixedly connected to a drive motor 212, and the support frame 211 is rotatably connected to a side of the drive motor 212 away from the drive motor 212 with a fan blade 213, the fan blade 213 penetrates the support frame 211 and is fixedly connected to the output shaft of the drive motor 212, the drive motor 212 is started, and the drive motor 212 drives the fan blade 213 to rotate, and the fan blade 213 rotates to force the gas concentrated in the middle area to rise, and the fan blade 213 rotates to force the gas in the fluid to rise, and the gas in the fluid can be separated from the liquid. When the gas and liquid two-phases flow in a mixed state, the difference in physical properties of the gas and liquid will cause mutual interference, affecting the accuracy of the flow measurement, and by measuring separately after separation, mutual interference between the gas-liquid two-phase flow can be avoided, thereby improving the accuracy of the measurement result.

[0043] The protection mechanism 3 also includes a buffer spring 304 fixedly connected to the bottom of the push plate 303, and the end of the buffer spring 304 away from the push plate 303 is fixedly connected to the bottom plate 301, and the side of the push plate 303 away from the buffer spring 304 is fixedly connected to a slide bar 305, and the end of the slide bar 305 away from the push plate 303 extends to the outside of the cylinder 2 302 and is slidably connected to the cylinder 2 302, and the end of the slide bar 305 away from the push plate 303 is fixedly connected to a buffer plate 306, and the bottom of the collecting plate 109 is fixedly connected to an arc plate 307. When the fluid enters the liquid outlet pipe 104 through the through groove 112, the fluid is still in a high-speed flow state at this time, and directly hits the liquid outlet pipe 104, which will cause damage to the liquid outlet pipe 104. By providing the buffer plate 306, the shape of the buffer plate 306 is an arc-shaped setting, and such a setting can change the direction of liquid flow. After the fluid hits the buffer plate 306, it flows along the arc surface of the buffer plate 306, so that the fluid The motion trajectory of the fluid is bent, thereby reducing the speed of the fluid and preventing the fast-flowing fluid from directly hitting the outer wall of the liquid outlet pipe 104. When the fluid hits the buffer plate 306, the buffer plate 306 will be subjected to impact force. After the buffer plate 306 is impacted, the buffer plate 306 will drive the sliding rod 305 and the push plate 303 to move downward. After the push plate 303 moves downward, an extrusion force is applied to the buffer spring 304, and the buffer spring 304 can absorb part of the impact force. The combination of the buffer plate 306 and the buffer spring 304 can make the flow of the fluid more stable. After the high-speed flowing fluid hits the buffer plate 306, the speed is reduced and the flow becomes smoother. At the same time, the elastic effect of the buffer spring 304 can absorb the fluctuation energy of the fluid and further reduce the unstable factors of the fluid. When the buffered fluid flows to the arc plate 307, the arc setting of the arc plate 307 changes the direction of the liquid and guides the liquid into the liquid outlet pipe 104.

[0044] The method for using the detection device includes the following steps:

[0045] S1: After the fluid flows into the top of the spiral plate 106, the fluid flows downward along the spiral plate 106. During the flow, the fluid is affected by centrifugal force and centripetal force, so that the flow velocity changes. Under the action of centrifugal force, the liquid with higher density is thrown to the outside, while the gas with lower density is concentrated in the center area.

[0046] S2: When the fan blades 213 rotate to drive the gas upward, the gas enters between the top plate 201 and the annular plate 102. As more gas continues to rise, the gas between the top plate 201 and the annular plate 102 exerts a squeezing force on the rotating plate 204, forcing the rotating plate 204 to swing at the inner wall of the air inlet cover 203;

[0047] S3: When the fluid flows into the top of the spiral plate 106 through the inlet pipe 103, it is blocked by the rectangular baffle 107, so that the incoming fluid flows into between the spiral baffle 110 and the cylinder 105. As the flow rate of the fluid increases, the liquid in the fluid will be thrown out to the outer side of the spiral baffle 110 through a plurality of filter holes 111;

[0048] S4: The buffer plate 306 has an arc-shaped shape, which can change the direction of liquid flow. After the fluid hits the buffer plate 306, it flows along the arc-shaped surface of the buffer plate 306, causing the movement trajectory of the fluid to bend, thereby reducing the speed of the fluid and preventing the fast-flowing fluid from directly hitting the outer wall of the liquid outlet pipe 104.

[0049] A specific application of this embodiment is:

[0050] When the flow rate of the fluid needs to be detected, the fluid flows into the top of the spiral plate 106 through the inlet pipe 103. The fluid is set in a spiral shape by the spiral plate 106. The upper part of the spiral plate 106 is wide and the lower part is narrow. After the fluid flows into the top of the spiral plate 106, the fluid flows downward along the spiral plate 106. The fluid is affected by centrifugal force and centripetal force during the flow process, so that the flow rate changes. The fluid is affected by the centrifugal force, and the liquid with higher density is thrown to the outside, while the gas with lower density is concentrated in the central area. As the liquid in the fluid continues to flow downward, it will pass through the through groove 112 under the influence of gravity. The liquid flows into the liquid outlet pipe 104, so that the liquid in the fluid can be separated, and the fluid with lower density will be concentrated in the central area. At this time, the driving motor 212 is started, and the driving motor 212 drives the fan blades 213 to rotate. After the fan blades 213 rotate, the gas concentrated in the middle area is forced to rise. After the fan blades 213 rotate and force the gas in the fluid to rise, the gas in the fluid can be separated from the liquid. When the gas-liquid two-phase mixed flow, the difference in physical properties of the gas and liquid will cause mutual interference, affecting the accuracy of the flow measurement. By measuring them separately after separation, mutual interference between the gas-liquid two-phase flow can be avoided, thereby improving the accuracy of the measurement result.

[0051] When the fan blades 213 rotate and drive the gas to rise, the gas enters between the top plate 201 and the annular plate 102. As more gas continues to rise, the gas between the top plate 201 and the annular plate 102 will exert an extrusion force on the rotating plate 204, forcing the rotating plate 204 to swing at the inner wall of the air inlet hood 203. After the rotating plate 204 swings, a gap is generated between the rotating plate 204 and the air inlet hood 203. When the rotating plate 204 swings, the strip plate 210 squeezes the slider 208 to slide in the slide groove 207. At this time, the slider 208 exerts an extrusion force on the extrusion spring 209, and the gas between the top plate 201 and the annular plate 102 enters the outlet pipe 202 through the gap. When the two phases When the flow rate in the flow is large, the swing amplitude of the rotating plate 204 will increase, and then the gap between the rotating plate 204 and the air intake hood 203 will also become larger. The rotating plate 204 can drive the rotating shaft 205 to swing when swinging. The detector 206 detects the swing amplitude of the rotating shaft 205. When the swing amplitude of the rotating shaft 205 is larger, the flow rate of the fluid is larger. When the flow rate becomes smaller, the squeezing force exerted on the squeezing spring 209 will be released, and the swing amplitude of the rotating plate 204 can be automatically adjusted according to the flow rate. This dynamic response can provide real-time feedback on the changes in the fluid flow rate, provide timely information for flow detection, and provide the device with accuracy and reliability in flow detection.

[0052] When the fluid flows along the track of the spiral plate 106, the flow rate will increase. The fluid is doped with impurities. When the fluid doped with impurities flows rapidly, the impurities in the fluid will contact the inner wall of the main body 101. The impurities will also quickly hit the inner wall of the main body 101 under the influence of the rapid flow of the fluid. When the fluid flows into the top of the spiral plate 106 through the inlet pipe 103, it is blocked by the rectangular baffle 107, so that the incoming fluid flows into the space between the spiral baffle 110 and the cylinder 105. As the flow rate of the fluid increases, the liquid in the fluid will pass through several The filter holes 111 are thrown out to the outer side of the spiral baffle 110, and the impurities in the fluid will remain between the cylinder 105 and the spiral baffle 110. The remaining impurities will fall on the top of the collecting plate 109 due to gravity, so that the impurities can be separated from the fluid, and the impurities can be prevented from wearing the inner wall of the main body 101 when the impurities flow quickly. The impurities can be separated from the liquid of the fluid. When the flow meter for detecting the fluid detects the liquid, the impurities in the fluid can be prevented from affecting the flow detector, thereby improving the stability of the device in detecting the liquid in the fluid.

[0053] When the fluid enters the liquid outlet pipe 104 through the through groove 112, the fluid is still in a high-speed flow state at this time, and directly hits the liquid outlet pipe 104, which will cause damage to the liquid outlet pipe 104. By providing a buffer plate 306, the shape of the buffer plate 306 is an arc-shaped setting. Such a setting can change the direction of liquid flow. After the fluid hits the buffer plate 306, it flows along the arc surface of the buffer plate 306, so that the movement trajectory of the fluid is bent, thereby reducing the speed of the fluid, and preventing the fast-flowing fluid from directly hitting the outer wall of the liquid outlet pipe 104. When the fluid hits the buffer plate 306, the buffer plate 306 will be subjected to impact force. After the buffer plate 306 is impacted, the buffer plate 306 will drive the slide bar 305 and the push plate 303 to move downward. After the push plate 303 moves downward, it applies an extrusion force to the buffer spring 304. The buffer spring 304 can absorb part of the impact force. The combination of the buffer plate 306 and the buffer spring 304 can make the flow of the fluid more stable. After the high-speed flowing fluid hits the buffer plate 306, the speed is reduced and the flow becomes smoother. At the same time, the elastic effect of the buffer spring 304 can absorb the fluctuation energy of the fluid and further reduce the instability factors of the fluid. When the fluid after buffering flows to the arc plate 307, the arc setting of the arc plate 307 changes the direction of the liquid and guides the liquid into the liquid outlet pipe 104.

[0054] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for detecting the flow rate of a gas-liquid two-phase flow in a microtube, comprising a separation mechanism (1), the separation mechanism (1) further comprising a main body (101), an annular plate (102) being fixedly connected to the inner wall of the main body (101), an inlet pipe (103) being fixedly connected to the left side of the main body (101), and a liquid outlet pipe (104) being fixedly connected to the right side of the main body (101), characterized in that: Also includes: A detection mechanism (2), wherein the top of the main body (101) is fixedly connected to a top plate (201), the top of the top plate (201) is fixedly connected to an air outlet pipe (202), the air outlet pipe (202) penetrates the top plate (201) and is fixedly connected to the top plate (201), and the bottom of the air outlet pipe (202) is fixedly connected to an air inlet cover (203); A protection mechanism (3), wherein the bottom of the main body (101) is fixedly connected to a bottom plate (301), the top of the bottom plate (301) is fixedly connected to a second cylinder (302), and a push plate (303) is slidably connected to the inner wall of the second cylinder (302); The separation mechanism (1) further comprises a cylinder 1 (105) fixedly connected to the bottom of the annular plate (102); a spiral plate (106) is fixedly connected to the outer wall of the cylinder 1 (105); a rectangular baffle 1 (107) is fixedly connected to the top of the spiral plate (106); a rectangular baffle 2 (108) is fixedly connected to the top of the spiral plate (106); a collecting plate (109) is fixedly connected to the inner wall of the main body (101); and the top of the collecting plate (109) is fixedly connected to the bottom of the spiral plate (106); The separation mechanism (1) further comprises a spiral baffle (110) fixedly connected to the top of the spiral plate (106), a plurality of filter holes (111) being provided on the outer wall of the spiral baffle (110), and a through groove (112) being provided on the outer wall of the collecting plate (109); The detection mechanism (2) further comprises a rotating plate (204) rotatably connected to the inner wall of the air intake hood (203); a rotating shaft (205) is fixedly connected to the side wall of the rotating plate (204); an end of the rotating shaft (205) away from the rotating plate (204) extends outside the air intake hood (203) and is rotatably connected to the air intake hood (203); and a detector (206) is fixedly connected to the top of the annular plate (102); When the fluid flows into the top of the spiral plate (106) through the inlet pipe (103), it is blocked by the rectangular baffle plate 1 (107), so that the incoming fluid flows into between the spiral baffle plate (110) and the cylinder 1 (105); The protection mechanism (3) further comprises a buffer spring (304) fixedly connected to the bottom of the push plate (303); a sliding rod (305) is fixedly connected to one side of the push plate (303) away from the buffer spring (304); and a buffer plate (306) is fixedly connected to one end of the sliding rod (305) away from the push plate (303).

2. The device for detecting the flow rate of gas-liquid two-phase flow in a microtube according to claim 1, characterized in that: The detection mechanism (2) further comprises two slide grooves (207) provided on the inner wall at the bottom of the air inlet hood (203), wherein a slider (208) is slidably connected in each of the two slide grooves (207), and a compression spring (209) is fixedly connected to the side walls of the two sliders (208), and the ends of the two compression springs (209) away from the sliders (208) are fixedly connected to the inner walls of the two slide grooves (207), and the tops of the two sliders (208) are rotatably connected to strip plates (210), and the sides of the two strip plates (210) away from the sliders (208) are rotatably connected to the side walls of the rotating plate (204).

3. The device for detecting the flow rate of gas-liquid two-phase flow in a microtube according to claim 2, characterized in that: The detection mechanism (2) further comprises a support frame (211) fixedly connected to the inner wall of the cylinder (105); the top of the support frame (211) is fixedly connected to a drive motor (212); a fan blade (213) is rotatably connected to a side of the support frame (211) away from the drive motor (212); the fan blade (213) passes through the support frame (211) and is fixedly connected to an output shaft of the drive motor (212).

4. The device for detecting the flow rate of gas-liquid two-phase flow in a microtube according to claim 3, characterized in that: One end of the buffer spring (304) away from the push plate (303) is fixedly connected to the bottom plate (301), one end of the slide rod (305) away from the push plate (303) extends outside the second cylinder (302) and is slidably connected to the second cylinder (302), and the bottom of the collecting plate (109) is fixedly connected to an arc plate (307).

5. A method for using a device for detecting the flow rate of a gas-liquid two-phase flow in a microtube, using the device for detecting the flow rate of a gas-liquid two-phase flow as claimed in claim 4, characterized in that: The steps include: S1: After the fluid flows into the top of the spiral plate (106), the fluid flows downward along the spiral plate (106). During the flow, the fluid is affected by centrifugal force and centripetal force, thereby causing the flow velocity to change. Under the action of centrifugal force, the liquid with higher density is thrown to the outside, while the gas with lower density is concentrated in the central area. S2: When the fan blades (213) rotate to drive the gas upward, the gas enters between the top plate (201) and the annular plate (102). As more gas continues to rise, the gas between the top plate (201) and the annular plate (102) exerts a squeezing force on the rotating plate (204), forcing the rotating plate (204) to swing on the inner wall of the air inlet cover (203); S3: When the fluid flows into the top of the spiral plate (106) through the inlet pipe (103), it is blocked by the rectangular baffle plate (107), so that the incoming fluid flows into between the spiral baffle plate (110) and the cylinder (105). As the flow rate of the fluid increases, the liquid in the fluid is thrown out through a plurality of filter holes (111) to the outside of the spiral baffle plate (110); S4: The buffer plate (306) has an arc-shaped shape, which can change the direction of liquid flow. After the fluid hits the buffer plate (306), it flows along the arc-shaped surface of the buffer plate (306), causing the movement trajectory of the fluid to bend, thereby reducing the speed of the fluid and preventing the fast-flowing fluid from directly hitting the outer wall of the liquid outlet pipe (104).

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