A turbine flow meter

Abstract

This invention discloses a turbine flow meter, comprising a first component, a second component, a measuring component, a purging component, and an adjusting component. The first component has a hollow chamber, a first inlet, and a first outlet. A first air inlet is formed on the outer wall of the first component. The second component is a hollow strip structure capable of sliding in a sealed manner along the length of the hollow chamber. A second inlet and a second outlet are respectively provided at both ends of the second component. A second air inlet is formed on the outer wall of the second component. The measuring component includes a turbine and a receiver. The turbine is rotatably disposed inside the second component, and the receiver is disposed on the first component. The purging component is mounted on the first component and communicates with the first air inlet. The purpose of this invention is to solve the technical problems of the influence of algae and other microorganisms on the accuracy of flow measurement and the impact of metabolic products on the service life of equipment.

Description

Technical Field

[0001] This invention belongs to the field of flow measurement technology, and more specifically, relates to a turbine flow meter. Background Technology

[0002] The core principle of a turbine flow meter lies in using the rotational power generated by the fluid impacting the turbine blades to convert the fluid velocity into a measurable electrical signal. Specifically, when the fluid being measured flows through the sensor, it impacts the turbine blades, causing them to rotate, and the rotational speed of the blades is directly proportional to the average flow velocity of the fluid.

[0003] However, when solid particles, fibers, or viscous substances are present in the fluid, these substances can adhere to the turbine blades and disrupt their dynamic balance. This imbalance leads to increased resistance during turbine rotation, causing a decrease in blade speed, which in turn results in the flow meter displaying a lower flow rate than the actual flow rate, resulting in a negative error.

[0004] To address the measurement problems caused by impurities, filters are typically installed before the flow meter to intercept large particles in the wastewater. However, it's important to note that filters are ineffective against microorganisms such as algae blooms. Over time, these microorganisms can form a biofilm layer on the turbine blade surface, affecting the accuracy of flow measurement. Furthermore, the metabolic byproducts of microorganisms (such as organic acids) can corrode the blade material, thus shortening the equipment's lifespan. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a turbine flow meter that solves the technical problems of filters being unable to effectively filter microorganisms such as algae blooms, microorganisms forming a biofilm layer on the surface of turbine blades, thus affecting the accuracy of flow measurement, and metabolic byproducts corroding the blade material and affecting the service life of the equipment.

[0006] To achieve the aforementioned objectives, the technical solution adopted by this invention includes: a turbine flow meter, comprising:

[0007] The first component has a strip-shaped hollow cavity inside. The first component is provided with a first inlet and a first outlet that communicate with both ends of the hollow cavity. The outer wall of the first component is provided with a first air inlet that communicates with the hollow cavity.

[0008] The second component is a hollow strip structure and is disposed within the hollow cavity along the length of the hollow cavity. The outer wall of the second component is in contact with the interior of the hollow cavity. The second component can slide in a sealed manner along the length of the hollow cavity. The two ends of the second component are respectively provided with a second inlet and a second outlet communicating with the interior of the second component. The outer wall of the second component is provided with a second air inlet communicating with the hollow cavity. When the second component slides relative to the first component, the second air inlet can communicate with the first air inlet.

[0009] A measuring component, comprising a turbine and a receiver, wherein the turbine is rotatably disposed inside a second component, the turbine axis direction being consistent with the length direction of the second component, and the receiver is disposed on a first component, the receiver being capable of obtaining different pulse signals according to different turbine rotation speeds;

[0010] A purging assembly is mounted on a first component and is connected to a first air inlet. The purging assembly blows gas through the first air inlet and a second air inlet towards the turbine to clean the turbine blades.

[0011] An adjustment component allows the second component to slide relative to the first component, thereby changing the relative position of the first and second components.

[0012] Compared with the prior art, the advantages of the present invention include:

[0013] (1) The present invention provides a turbine flow meter, by adjusting the component, the second component moves relative to the first component, so that the second air inlet is connected to the first air inlet, and the purging component can blow gas toward the turbine to clean the turbine blades, reduce the attachment of microorganisms on the turbine blades, and thus reduce the impact of microorganisms on the flow measurement accuracy.

[0014] In addition, since the microorganisms on the turbine blades are cleaned by the purging components, the corrosion of the blade material by the products of microbial metabolism is reduced, thereby extending the service life of the equipment.

[0015] (2) In the turbine flow meter provided by this invention, when the second component is moved relative to the first component by adjusting the assembly, so that the second air inlet communicates with the first air inlet, the relative position of the receiver and the turbine changes, causing the turbine blades to be unable to face the receiver directly. As a result, the receiver cannot receive the signal generated by the rotation of the turbine blades, and therefore no pulse signal is generated. Thus, this invention can clean the turbine blades without turning off the receiver. In contrast, existing cleaning methods, if the receiver is not turned off, will cause the turbine blades to rotate during cleaning, and the receiver will normally receive the signal generated by the turbine rotation. This invention reduces the frequent operation of turning off the receiver for cleaning the turbine blades, avoiding the inconvenience of having to re-meter the flow rate after turning off the receiver.

[0016] Furthermore, the second component is a hollow cylindrical structure with open ends. Two circular sealing plates are rotatably connected inside the second component. The two sealing plates are located at both ends of the second component. Two first transmission components are respectively provided between the two sealing plates and the first component. Through the two first transmission components, the two sealing plates can be rotated synchronously when the second component slides relative to the first component. When the two sealing plates rotate synchronously to be perpendicular to the length direction of the second component, the two sealing plates seal the interior of the second component.

[0017] The first component has a first drain port on its outer wall that communicates with the hollow cavity, and the second component has a second drain port on its outer wall that communicates with the interior of the second component. When the two sealing plates are rotated to be perpendicular to the direction of the second component, the first drain port communicates with the second drain port, and the first air inlet communicates with the second air inlet.

[0018] Furthermore, the second component has a filter assembly inside, the filter assembly is located between the two sealing plates, the filter assembly is located on the turbine side near the second inlet, the filter assembly has a first filter surface and a second filter surface on both sides respectively, the first filter surface is located on the filter assembly side away from the turbine, the second filter surface is located on the filter assembly side near the turbine, the first filter surface and the second filter surface are parallel and both are perpendicular to the length direction of the second component.

[0019] The second drain outlet is located on one side of the first filter surface of the filter assembly, and the second air inlet is located on one side of the second filter surface of the filter assembly.

[0020] Furthermore, a first shaft is rotatably connected to the filter assembly. The axis of the first shaft is aligned with the axis of the second component. Both ends of the first shaft extend out of the filter assembly. A first cleaning rod and a second cleaning rod are respectively provided at both ends of the first shaft. The first cleaning rod abuts against the first filter surface, and the second cleaning rod abuts against the second filter surface.

[0021] The turbine has a second shaft, which is rotatably connected to a second component. A second transmission assembly is provided between the second shaft and the first shaft. Through the second transmission assembly, the rotation of the second shaft can drive the first shaft to rotate, thereby driving the cleaning rod to rotate.

[0022] Furthermore, the direction in which the purging assembly blows the turbine to rotate is opposite to the direction in which the fluid drives the turbine to rotate. The second transmission assembly is a one-way transmission assembly. Through the one-way transmission assembly, when the purging assembly blows the turbine to rotate to make the second shaft rotate, it can drive the first shaft to rotate. When the fluid drives the turbine to rotate to make the second shaft rotate, it cannot drive the first shaft to rotate.

[0023] Furthermore, the filter assembly includes a hollow substrate, which is fixed inside a second component. The substrate has a first opening on the side facing away from the turbine, and a first filter screen is disposed in the first opening. The side of the first filter screen facing away from the turbine is a first filter surface. The substrate has a second opening on the side facing the turbine, and a second filter screen is disposed in the second opening. The side of the second filter screen near the turbine is a second filter surface.

[0024] An adjustment plate for closing the second opening is provided inside the substrate. The adjustment plate is sleeved on the first shaft. A first elastic member is provided between the adjustment plate and the substrate. When the first elastic member is in its natural state, the adjustment plate does not close the second opening. A push rod parallel to the length direction of the second component is provided on the adjustment plate. One end of the push rod is fixedly connected to the adjustment plate, and the other end extends through the substrate in a direction away from the turbine. The end of the push rod away from the turbine has an inclined surface. A push plate is provided at the end of the first cleaning rod. When the push plate rotates with the cleaning rod, it can push the push rod towards the turbine through the inclined surface to make the adjustment plate close the second opening. The push plate has a holding surface on the side opposite to the push rod. After the push rod moves towards the turbine, it can abut against the holding surface. During the time period when the push rod abuts against the holding surface, the adjustment plate always closes the second opening.

[0025] The push plate is made of magnetic material. A magnetic block is provided on the side of the substrate facing away from the turbine. The magnetic poles of the magnetic block are opposite to the magnetic poles of the push plate. When the push plate and the magnetic block are attracted together, the adjustment plate does not close the second opening.

[0026] Furthermore, there are multiple second air inlets, which are arranged along the length of the second component. The number of first air inlets is the same as the number of second air inlets, and when the sealing plate closes the end of the second component, the first air inlets and the second air inlets correspond to each other and overlap.

[0027] Furthermore, the purging assembly includes an air pump, an installation pipe, and an adjustment pipe. The air pump is installed outside the first component, the installation pipe is integrally connected to the outside of the first component, and the first air inlet extends into the installation pipe at the end away from the second component.

[0028] The regulating tube is located inside the mounting tube, and the outer wall of the regulating tube abuts against the inner wall of the mounting tube. The regulating tube is rotatably and sealed inside the mounting tube. The regulating tube can rotate about the axis of the mounting tube. The regulating tube is provided with driving blades that can drive the regulating tube to rotate when the gas flows. The outer wall of the regulating tube has the same number of air guide holes as the first air inlet. The multiple air guide holes are spirally arranged along the circumference of the regulating tube. During the rotation of the regulating tube, the multiple air guide holes successively coincide with the multiple first air inlets.

[0029] An air guide pipe is provided between the air pump and the installation pipe. One end of the air guide pipe is connected to the gas outlet of the air pump, and the other end is connected to one end of the installation pipe. The end of the regulating pipe near the air guide pipe is open. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0032] Figure 2 for Figure 1 Schematic diagram of cross-section Figure 1 ;

[0033] Figure 3 for Figure 1 Schematic diagram of cross-section Figure 2 ;

[0034] Figure 4 for Figure 1 Schematic diagram of cross-section Figure 3 ;

[0035] Figure 5 for Figure 1 Schematic diagram of cross-section Figure 4 ;

[0036] Figure 6 for Figure 1 Schematic diagram of cross-section Figure 5 ;

[0037] Figure 7 for Figure 1 Schematic diagram of cross-section Figure 6 ;

[0038] Figure 8 Schematic diagram of the regulating pipe Figure 1 ;

[0039] Figure 9 Schematic diagram of the regulating pipe Figure 2 .

[0040] Figure label:

[0041] First component 1, Second component 2, First inlet 3, First outlet 4, First air inlet 5, Second inlet 6, Second outlet 7, Second air inlet 8, Turbine 9, Receiver 10, Sliding hole 11, Slider 12, Screw 13, First limiting block 14, Second limiting block 15, Sealing plate 16, First drain outlet 17, Second drain outlet 18, Rotating shaft 19, Gear 20, Rack 21, First filter surface 22, Second filter surface 23, First shaft 24, First cleaning rod 25, Second cleaning rod 26, Second shaft 27, First sleeve 28, Second sleeve 29, Slide groove 30, Sliding bar 31, First spring 32, Base plate 33, First filter screen 34, Second filter screen 35, Adjusting plate 36, Second spring 37, Push rod 38, Inclined surface 39, Push plate 40, Magnetic block 41, Air pump 42, Mounting pipe 43, Adjusting pipe 44, Drive blade 45, Air guide hole 46, Air guide pipe 47. Detailed Implementation

[0042] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples in the embodiments of this application.

[0043] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, the present invention covers any substitutions, modifications, equivalent methods and solutions made on the spirit, principles and scope of the present invention as defined by the claims. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] In the description of this application, the terms "first," "second," "third," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar words, do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar words, mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. The terms "connected" or "linked," and similar words, are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0045] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, when using positional terms such as "both sides," "outer side," and "upper and lower," it should be understood that they are used only for ease of understanding and description, taking into account that the structure may be oriented to other positions.

[0046] In the description of this application, unless otherwise expressly specified and limited, the technical or scientific terms used shall have the ordinary meaning understood by a person with ordinary skills in the art to which this application pertains. Terms such as “installation,” “connection,” and “joining” shall be interpreted broadly, for example, as fixed connection, detachable connection, mating connection, or integral connection. For a person skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0047] Please see Figure 1-9 The present invention provides a technical solution: a turbine 9 flow meter, comprising a first component 1, a second component 2, a measuring component, a purging component, and an adjusting component.

[0048] See Figure 2The first component 1 has a strip-shaped hollow cavity inside, which is arranged horizontally. "Strip-shaped" refers to the hollow cavity having a long, columnar structure, such as a cylinder, triangular prism, or rectangular column. The hollow cavity provides flow space for fluid. The first component 1 is respectively provided with a first inlet 3 and a first outlet 4 communicating with both ends of the hollow cavity. The first inlet 3 and the first outlet 4 are used for fluid inflow and outflow. The outer wall of the first component 1 has a first air inlet 5 communicating with the hollow cavity. The first air inlet 5 is used to introduce purge gas into the hollow cavity, thereby facilitating subsequent purge gas purging of the turbine 9 blades.

[0049] See Figure 2 The second component 2 is a hollow strip structure, disposed within the hollow cavity along its length. The outer wall of the second component 2 is in contact with the interior of the hollow cavity, allowing for sealed sliding along the length of the hollow cavity. In other words, the second component 2 is located inside the first component 1, with its outer wall abutting against the inner wall of the first component 1; that is, the cross-sectional dimensions of the second component 2 are identical to those of the hollow cavity. Sealed sliding means that when the second component 2 slides within the hollow cavity, gas will not leak through the space between the outer wall of the second component 2 and the inner wall of the first component 1 because the outer wall of the second component 2 abuts against the inner wall of the first component 1. The second component 2 has a second inlet 6 and a second outlet 7 at both ends, communicating with the interior of the second component 2. Since the second component 2 is located within the first component 1 and its length is aligned with the length of the hollow cavity, the first inlet 3 and the second inlet 6 are connected, as are the first outlet 4 and the second outlet 7. The fluid flows into the hollow cavity through the first inlet 3, then into the interior of the second component 2 through the second inlet 6, then out of the second component 2 through the second outlet 7, and finally out through the first outlet 4. (See also...) Figure 7 The outer wall of the second component 2 is provided with a second air inlet 8 that communicates with the hollow cavity. During the sliding process of the second component 2 relative to the first component 1, the second air inlet 8 can communicate with the first air inlet 5. When the first air inlet 5 and the second air inlet 8 are in communication, the purging gas is allowed to enter the second component 2 and blow towards the blades of the turbine 9 to clean the blades of the turbine 9.

[0050] See Figure 1-2The measuring component includes a turbine 9 and a receiver 10. The turbine 9 is rotatably disposed inside the second component 2, with the axis of the turbine 9 aligned with the length direction of the second component 2. When fluid flows through the turbine 9, it exerts a force on the blades of the turbine 9, causing the turbine 9 to rotate around its axis. The rotation speed of the turbine 9 varies depending on the fluid flow velocity. The receiver 10 is disposed on the first component 1. The receiver 10 can obtain different pulse signals according to the different rotation speeds of the turbine 9, converting the mechanical rotation information of the turbine 9 into electrical signals for subsequent processing and analysis to obtain flow data. The receiver 10 detects changes in a certain physical quantity (such as changes in magnetic flux, depending on the type of receiver 10) generated when the turbine 9 rotates and converts it into pulse signals. The frequency of the pulse signals is proportional to the rotation speed of the turbine 9, thus reflecting the fluid flow velocity.

[0051] Existing methods typically involve mounting magnets on the blades of turbine 9 and using a magnetic pickup sensor (i.e., receiver 10) to generate pulses. However, the detection range of the magnetic pickup sensor is limited. If the turbine 9 blades deviate from the sensor's effective detection area during rotation (e.g., axial displacement), the change in the magnetic field will not be detected by the sensor. (See also...) Figure 2-4 Thus, when the position of the second component 2 relative to the first component 1 changes so that the first air inlet 5 and the second air inlet 8 coincide, the position of the turbine 9 blades is axially offset, so that the turbine 9 blades cannot be directly facing the receiver 10. The receiver 10 cannot receive the signal generated by the rotation of the turbine 9 blades, and therefore cannot generate a pulse signal. At this time, the first air inlet 5 and the second air inlet 8 coincide, which is the purging working state of the turbine 9 blades. Thus, even if the gas purging causes the turbine 9 blades to rotate, it will not affect the measurement of fluid flow.

[0052] See Figure 7 The purging assembly is installed on the first component 1 and is connected to the first air inlet 5. The purging assembly blows gas through the first air inlet 5 and the second air inlet 8 towards the turbine 9, cleaning the turbine 9 blades and reducing the accumulation of impurities on them. The purging assembly generates gas with a certain pressure and flow rate through an internal air source (such as a compressed air source). The gas enters the second component 2 through the first air inlet 5 and the second air inlet 8, impacting the turbine 9 blades and blowing away impurities. It should be noted that the first component 1 is installed on the pipeline near the pipeline outlet of the fluid delivery mechanism (such as a delivery pump), and the valve between the first component 1 and the pipeline outlet should be in the open state. With this configuration, during gas purging, the fluid delivery structure is shut off, and the purging gas can only be discharged outwards through the pipeline outlet, thus forming a gas flow channel. After the gas purging assembly blows away impurities from the turbine 9 blades, the gas flows with the pipeline and is discharged through the pipeline outlet.

[0053] See Figure 1-2An adjustment component is installed on the first component 1. By adjusting the component, the second component 2 slides relative to the first component 1, changing the relative position of the first component 1 and the second component 2, thereby controlling the communication state between the second air inlet 8 and the first air inlet 5, and realizing operations such as opening and closing the purging function. The adjustment component applies a force to the second component 2 through a mechanical structure, causing it to slide along its length within the hollow cavity of the first component 1. When it slides to a suitable position, the second air inlet 8 communicates with the first air inlet 5, allowing purging to proceed. When it slides to other positions, the two are disconnected, and purging stops.

[0054] Specifically, the outer wall of the first component 1 has a sliding hole 11 communicating with the interior of the first component 1. The sliding hole 11 is strip-shaped, and its length direction is consistent with the length direction of the second component 2. The adjustment assembly includes a slider 12 and a screw 13. The slider 12 is located inside the sliding hole 11 and can slide along the length direction of the sliding hole 11. The inner end of the slider 12 extends towards the second component 2 and is fixedly connected to the second component 2. The outer end of the slider 12 extends away from the second component 2 and passes through the sliding hole 11. The screw 13 is rotatably connected to the outside of the first component 1. The length direction of the screw 13 is consistent with the length direction of the second component 2. The screw 13 passes through the slider 12, and the screw 13 and the slider 12 are connected by a threaded engagement. By rotating the screw 13, the slider 12 can slide along the length direction of the screw 13. Since the slider 12 is fixedly connected to the second component 2, rotating the screw 13 can move the second component 2 along the length direction of the screw 13 (i.e., move along the length direction of the second component 2).

[0055] Furthermore, the first component 1 is externally provided with a first limiting block 14 and a second limiting block 15. When the slider 12 slides to abut against the first limiting block 14, the second air inlet 8 is misaligned with the first air inlet 5, and the blades of the turbine 9 face the receiver 10. The receiver 10 can receive the rotation signal of the turbine 9 blades. At this time, the turbine 9 flow meter is in the first operating state, i.e., the fluid measurement operating state. In the first operating state, the receiver 10 can receive the rotation signal of the turbine 9 blades and can measure the flow rate of the fluid. When the slider 12 slides to abut against the second limiting block 15, the second air inlet 8 coincides with the first air inlet 5. After the turbine 9 blades move axially with the second component 2, they can no longer face the receiver 10. The receiver 10 cannot receive the rotation signal of the turbine 9 blades. At this time, the turbine 9 flow meter is in the second operating state, i.e., the purging and cleaning operating state.

[0056] See Figure 2-4In this embodiment: the second component 2 is a hollow cylindrical structure with open ends. Specifically, the second component 2 and the first component 1 are both hollow elongated cylindrical structures. The second component 2 has two circular sealing plates 16 rotatably connected inside. The sealing plates 16 adopt the butterfly valve opening and closing principle. The sealing mechanism of the sealing plates 16 is consistent with the way the butterfly valve plate closes the pipeline.

[0057] Two first transmission assemblies are respectively provided between the two sealing plates 16 and the first component 1. Through the two first transmission assemblies, the two sealing plates 16 can rotate synchronously when the second component 2 slides relative to the first component 1. When the two sealing plates 16 rotate synchronously to be perpendicular to the length direction of the second component 2 (that is, the axial direction of the sealing plate 16 is consistent with the axial direction of the second component 2), the two sealing plates 16 seal the interior of the second component 2. The first transmission assemblies convert the sliding motion of the second component 2 into the rotational motion of the sealing plates 16, realizing mechanical linkage.

[0058] The outer wall of the first component 1 has a first drain port 17 communicating with the hollow cavity, and the outer wall of the second component 2 has a second drain port 18 communicating with the interior of the second component 2. When the two sealing plates 16 are rotated to be perpendicular to the direction of the second component 2, the first drain port 17 and the second drain port 18 communicate with each other, and the first air inlet 5 and the second air inlet 8 communicate with each other. The two sealing plates 16 are located at both ends of the second component 2, that is, the turbine 9, the first air inlet 5, the second air inlet 8, the first drain port 17 and the second drain port 18 are all located between the two sealing plates 16. It should be understood that when the two sealing plates 16 close both ends of the second component 2, the turbine 9, the first air inlet 5, the second air inlet 8, the first drain outlet 17 and the second drain outlet 18 are all located in the space between the two sealing plates 16. When the first air inlet 5 and the second air inlet 8 overlap, and the first drain outlet 17 and the second drain outlet 18 overlap, the gas flow path is the first air inlet 5 - the second air inlet 8 - the second drain outlet 18 - the first drain outlet 17 because the space between the two sealing plates 16 is closed.

[0059] See Figure 5-6 When the sealing plate 16 is not vertical, the interior of the second component 2 is open, the first drain port 17 and the second drain port 18 are misaligned, and the first air inlet 5 and the second air inlet 8 are misaligned, preventing the purge gas from flowing. At this time, the turbine 9 flow meter is in its first operating state. The second component 2 slides relative to the first component 1, driving the first transmission assembly. The first transmission assembly converts the sliding motion into rotation of the sealing plate 16, and both sealing plates 16 rotate synchronously to the vertical direction. (See reference...) Figure 2-4 When the sealing plate 16 is vertical, it seals the second component 2, forming a relatively sealed space between the two sealing plates 16. At the same time, the first drain port 17 and the second drain port 18 are aligned, and the first air inlet 5 and the second air inlet 8 are aligned, forming a drain and air intake passage. At this time, the turbine 9 flow meter is in the second operating state.

[0060] Specifically, the side wall of the sealing plate 16 is provided with a rotating shaft 19, which is rotatably connected to the second component 2. The axial direction of the rotating shaft 19 is consistent with the diameter direction of the second component 2. The side wall of the first component 1 has an outwardly protruding rectangular cavity, the length direction of which is consistent with the length direction of the second component 2. The first transmission assembly includes a gear 20 and a rack 21, both of which are located within the rectangular cavity. The rack 21 is fixedly disposed inside the rectangular cavity along its length direction and meshes with the gear 20. The end of the rotating shaft 19 away from the sealing plate 16 extends into the rectangular cavity. The rotating shaft 19 is fixedly connected to the gear 20 and is coaxially disposed. When the second component 2 moves relative to the first component 1, it synchronously drives the gear 20 to move. Since the gear 20 meshes with the rack 21, the gear 20 can rotate through the rack 21 as it moves with the second component 2, thereby driving the rotating shaft 19 to rotate and causing the sealing plate 16 to rotate.

[0061] In practical implementation:

[0062] ① When performing gas purging to clean the turbine 9 blades, two sealing plates 16 are installed to enclose the second component 2, forming a relatively sealed cleaning space inside the second component 2. At this time, the first drain port 17 is connected to the second drain port 18, and the first air inlet 5 and the second air inlet 8 are also connected. The gas flow path is: first air inlet 5 - second air inlet 8 - second drain port 18 - first drain port 17. Since the two sealing plates 16 enclose the space formed inside the second component 2, this space is smaller than the method of directly discharging gas from the pipe outlet. Therefore, during the operation of the purging assembly, impurities on the turbine 9 blades can be discharged from the second component 2 more promptly.

[0063] ② During the gas purging process to clean the turbine 9 blades, the two sealing plates 16 seal the second component 2, isolating both ends of the second component 2 from the pipeline. This allows for turbine 9 blade cleaning without shutting down the flow delivery mechanism. For example, during gas purging, simply move the second component 2 to the target position using the adjusting assembly; under the action of the first transmission assembly, the sealing plates 16 will then seal the second component 2. After the purging assembly completes the cleaning of the turbine 9 blades, adjust the adjusting assembly again to switch the turbine 9 flow meter back to flow measurement mode. At this time, the fluid continues to be delivered under the operation of the fluid delivery mechanism, allowing flow measurement to continue. The entire process eliminates the need to start and stop the fluid delivery mechanism, making it more convenient.

[0064] ③ By using the first transmission assembly, the second component 2 can be moved relative to the first component 1 using the adjustment assembly, thus realizing the opening and closing of the sealing plate 16 without the need for an additional drive device to rotate the sealing plate 16. This saves costs and simplifies operation.

[0065] See Figure 2-3 In this embodiment: the second component 2 has a filter assembly located between two sealing plates 16. The filter assembly is located on the side of the turbine 9 near the second inlet 6. The filter assembly has a first filter surface 22 and a second filter surface 23 on both sides. The first filter surface 22 and the second filter surface 23 filter fluids in two directions respectively. The first filter surface 22 is located on the side of the filter assembly facing away from the turbine 9, and the second filter surface 23 is located on the side of the filter assembly near the turbine 9. The first filter surface 22 and the second filter surface 23 are parallel and perpendicular to the length direction of the second component 2. The first filter surface 22 filters the fluid facing away from the turbine 9, removing impurities from the fluid in that direction. When the fluid near the turbine 9 passes through the second filter surface 23, the second filter surface 23 filters the fluid. Specifically, during fluid flow measurement, the first filter surface 22 filters the fluid to be measured, reducing the possibility of impurities accumulating on the turbine 9. When the purging assembly cleans the blades of the turbine 9, the second filter surface 23 filters impurities that fall off the blades of the turbine 9 when the purging gas is blown towards the blades.

[0066] The second drain port 18 is located on one side of the first filter surface 22 of the filter assembly. The second drain port 18 is used to discharge the impurities trapped by the first filter surface 22, effectively maintaining the filtration effect of the first filter surface 22 and reducing the possibility of impurity accumulation affecting filtration efficiency. When the first filter surface 22 traps a certain amount of impurities, the second drain port 18 is opened, and the impurities are discharged from the second component 2 by gravity or external pressure (i.e., the purging force provided by the purging assembly in this invention), so that the first filter surface 22 can continue to perform filtration work effectively. The second air inlet 8 is located on one side of the second filter surface 23 of the filter assembly. When gas purging is performed, the purging assembly introduces gas into the second component 2 through the second air inlet 8. After the gas purges the blades of the turbine 9, it can blow off the impurities adhering to the blades of the turbine 9. These impurities, as well as the impurities in the purging gas, can be captured by the second filter surface 23. When the flow rate is measured, these impurities can be flushed down by the fluid and carried away with the fluid.

[0067] In practical implementation:

[0068] The first filter surface 22 and the second filter surface 23 on the filter assembly can filter the fluid on both sides of the filter assembly respectively. Specifically, when the fluid flow rate is measured, the fluid can be filtered through the first filter surface 22 to reduce the accumulation of impurities on the turbine 9. It should be noted that during this process, when the fluid flows to the turbine 9 through the second filter surface 23, it can form a backwashing effect on the second filter surface 23, thereby reducing the possibility of impurities remaining on the second filter surface 23.

[0069] In addition, when the purging assembly is working, the second filter surface 23 can filter the purging gas and the impurities (such as microorganisms attached to the blades of the turbine 9 that are blown by the purging gas) that fall off the turbine 9 blades (at this time, the microorganisms have formed bio-sludge, which can be effectively filtered by the second filter surface 23). It should be noted that during this process, when the gas is blown from the second filter surface 23 to the first filter surface 22, it can form a back-blowing effect on the first filter surface 22, thereby reducing the possibility of impurities remaining on the first filter surface 22.

[0070] See Figure 2-3 In this embodiment, a first shaft 24 is rotatably connected to the filter assembly. The axis of the first shaft 24 is aligned with the axis of the second component 2, meaning the first shaft 24 and the second component 2 are coaxially aligned. Both ends of the first shaft 24 extend beyond the filter assembly. A first cleaning rod 25 and a second cleaning rod 26 are respectively provided at both ends of the first shaft 24. The first cleaning rod 25 abuts against the first filter surface 22, and the second cleaning rod 26 abuts against the second filter surface 23. Since the first filter surface 22 and the second filter surface 23 are perpendicular to the length direction of the second component 2, and the length direction of the second component 2 is the same as the axis direction of the second component 2 (meaning the length direction and the axis direction of the second component 2 point in the same direction), and both the first filter surface 22 and the second filter surface 23 are perpendicular to the length direction of the second component 2, this means that the first filter surface 22 and the second filter surface 23 are perpendicular to the axis direction of the second component 2. Furthermore, because the first shaft 24 is coaxial with the second component 2, both the first filter surface 22 and the second filter surface 23 are perpendicular to the axis of the first shaft 24. The first cleaning rod 25 abuts against the first filter surface 22, and the second cleaning rod 26 abuts against the second filter surface 23. Therefore, it can be seen that both the first cleaning rod 25 and the second cleaning rod 26 are perpendicular to the first shaft 24.

[0071] The turbine 9 has a second shaft 27, which is rotatably connected to the second component 2. The axis of the second shaft 27 is aligned with the length of the second component 2. A second transmission assembly is provided between the second shaft 27 and the first shaft 24. Through the second transmission assembly, the rotation of the second shaft 27 can drive the first shaft 24 to rotate, which in turn drives the first cleaning rod 25 and the second cleaning rod 26 to rotate. The rotation of the first cleaning rod 25 can clean the first filter surface 22, and the rotation of the second cleaning rod 26 can clean the second filter surface 23.

[0072] In practical implementation:

[0073] ① By rotating the first cleaning rod 25 and the second cleaning rod 26, the first filter surface 22 and the second filter surface 23 can be cleaned respectively, reducing the possibility of impurities accumulating on the first filter surface 22 and the second filter surface 23.

[0074] ② When the turbine blade 9 is rotated by an external force, it drives the second rotating shaft 19 to rotate. The second rotating shaft 19 drives the first rotating shaft 19 to rotate through the second transmission assembly, which in turn drives the first cleaning rod 25 and the second cleaning rod 26 to rotate. During the rotation of the turbine 9, the first filter surface 22 and the second filter surface 23 are cleaned. The design is ingenious and does not require an additional drive device to achieve the rotation of the first cleaning rod 25 and the second cleaning rod 26, which saves costs and simplifies operation.

[0075] See Figure 2 In this embodiment: the direction in which the purging assembly blows the turbine 9 to rotate is opposite to the direction in which the fluid drives the turbine 9 to rotate. The second transmission assembly is a one-way transmission assembly. Through the one-way transmission assembly, when the purging assembly blows the turbine 9 to rotate so that the second shaft 27 rotates, it can drive the first shaft 24 to rotate. When the fluid drives the turbine 9 to rotate so that the second shaft 27 rotates, it cannot drive the first shaft 24 to rotate.

[0076] When the purging assembly drives the turbine 9 to rotate, which in turn causes the second shaft 27 to rotate, the power can be smoothly transmitted from the second shaft 27 to the first shaft 24 due to the characteristics of the one-way transmission assembly. The first shaft 24, after receiving power, begins to rotate, driving the first cleaning rod 25 and the second cleaning rod 26 located at its two ends to rotate. The first cleaning rod 25 cleans the first filter surface 22, and the second cleaning rod 26 cleans the second filter surface 23, thereby achieving automatic cleaning of the filter assembly. When the fluid drives the turbine 9 to rotate, causing the second shaft 27 to rotate, the one-way transmission assembly prevents power from being transmitted from the second shaft 27 to the first shaft 24. That is, at this time, the rotation of the second shaft 27 cannot drive the first shaft 24 to rotate, and the first cleaning rod 25 and the second cleaning rod 26 remain stationary, without cleaning the filter surface. The purpose of this design is to reduce wear on the cleaning rods and extend their service life during normal measurement work (when the fluid drives the turbine 9), as the rotation of the cleaning rods increases resistance to the fluid driving the turbine 9, which may cause unnecessary interference.

[0077] One-way transmission components can be structures such as ratchet mechanisms and one-way bearings; see reference. Figure 2In this embodiment, the unidirectional transmission assembly includes a first sleeve 28 and a second sleeve 29. The first sleeve 28 and the second sleeve 29 are respectively disposed at opposite ends of the first shaft 24 and the second shaft 27. The first sleeve 28 is fixedly sleeved on the first shaft 24, and the second sleeve 29 is slidably sleeved on the second shaft 27. A limiting structure is provided on the second shaft 27 so that the second sleeve 29 can only slide relative to the axial direction of the second shaft 27. The limiting structure includes a groove 30 formed on the outer wall of the second shaft 27. The groove 30 extends along the axial direction of the second shaft 27, and a sliding strip 31 is disposed in the groove 30. The sliding strip 31 is fixed on the inner wall of the second sleeve 29. The first sleeve 28 and the second sleeve 29 are respectively provided with a first locking tooth and a second locking tooth that cooperate with each other at opposite ends. The first locking tooth and the second locking tooth are inclined, and the inclination direction of the first locking tooth and the second locking tooth is adapted to the rotation direction of the second shaft 27. That is, when the purging assembly blows the turbine 9 and causes the turbine 9 to rotate, the first locking tooth and the second locking tooth lock together, and the rotation of the second shaft 27 can drive the first shaft 24 to rotate. The second shaft 27 is fitted with a first spring 32, which is located on the side of the second sleeve 29 opposite to the first sleeve 28. One end of the first spring 32 is fixedly connected to the side of the second sleeve 29 opposite to the first sleeve 28, and the other end of the first spring 32 is fixedly connected to the second shaft 27. Under the action of the first spring 32, the second sleeve 29 is always pushed against the first sleeve 28.

[0078] In the initial state, the second sleeve 29 is pushed against the first sleeve 28 by the first spring 32. At this time, the first locking tooth on the first sleeve 28 and the second locking tooth on the second sleeve 29 are in contact, but are ready to respond to power transmission or cut-off at any time. The first spring 32 is under a certain compression state, continuously applying a thrust towards the first sleeve 28 to the second sleeve 29, so that the second sleeve 29 always maintains close contact with the first sleeve 28. When the purging assembly blows towards the turbine 9, the turbine 9 starts to rotate, which in turn drives the second shaft 27 connected to it to rotate. The rotation of the second shaft 27 causes the second sleeve 29 fixed to it to rotate as well. Since the second sleeve 29 is in close contact with the first sleeve 28, and the inclination direction of the first locking tooth and the second locking tooth is adapted to the rotation direction of the second shaft 27, during the rotation of the second sleeve 29, the second locking tooth will gradually slide into and lock together along the inclined surface 39 of the first locking tooth. Once the first and second locking teeth are engaged, the rotation of the second shaft 27 is transmitted to the first shaft 24 through the second sleeve 29 and the first sleeve 28, causing the first shaft 24 to rotate along with the second shaft 27. The rotation of the first shaft 24 drives the first cleaning rod 25 and the second cleaning rod 26 at its ends to rotate, thereby cleaning the first filter surface 22 and the second filter surface 23 respectively. During this process, the first spring 32 continues to function, maintaining close contact between the second sleeve 29 and the first sleeve 28, ensuring stable engagement between the first and second locking teeth and reliable power transmission. When the fluid drives the turbine 9 to rotate, the turbine 9 drives the second shaft 27 to rotate in the opposite direction to the direction of the purging assembly. At this time, because the tilt direction of the first and second locking teeth does not match this rotation direction, during the rotation of the second shaft 27, the second locking tooth will generate a component force on the first locking tooth along the axis of the second shaft 27. This component force overcomes the elastic force of the first spring 32, causing the second sleeve 29 to slide along the groove 30 on the second shaft 27 in a direction away from the first sleeve 28. As the second sleeve 29 slides, the first locking tooth and the second locking tooth gradually separate, and after rotating a certain angle, they re-engage under the elastic force of the first spring 32. This cycle continues, cutting off the power transmission between the second shaft 27 and the first shaft 24. The rotation of the second shaft 27 can no longer drive the rotation of the first shaft 24.

[0079] See Figure 2-4 In this embodiment: the filter assembly includes a hollow substrate 33, which is fixed inside the second component 2. The substrate 33 has a first opening on the side facing away from the turbine 9, and a first filter screen 34 is disposed in the first opening. The side of the first filter screen 34 facing away from the turbine 9 is a first filter surface 22. The substrate 33 has a second opening on the side facing the turbine 9, and a second filter screen 35 is disposed in the second opening. The side of the second filter screen 35 near the turbine 9 is a second filter surface 23.

[0080] An adjustment plate 36 for closing the second opening is provided inside the substrate 33. The adjustment plate 36 is sleeved on the first shaft 24. A first elastic element is provided between the adjustment plate 36 and the substrate 33. Specifically, the first elastic element is a second spring 37. The second spring 37 is sleeved on the first shaft 24. One end of the second spring 37 is fixedly connected to the substrate 33 (since the first filter screen 34 is fixedly connected to the first filter screen 34 at the end of the second spring 37 away from the adjustment plate 36, the end of the second spring 37 away from the adjustment plate 36 is actually fixedly connected to the substrate 33), and the other end is fixedly connected to the adjustment plate 36. When the first elastic member is in its natural state, the adjusting plate 36 does not close the second opening. A push rod 38 parallel to the length of the second component 2 is provided on the adjusting plate 36. One end of the push rod 38 is fixedly connected to the adjusting plate 36, and the other end extends away from the turbine 9 through the base plate 33. The end of the push rod 38 away from the turbine 9 has a slope 39. The push rod 38 transmits force, converting the movement of the first cleaning rod 25 into the movement of the adjusting plate 36. A push plate 40 is provided at the end of the first cleaning rod 25. When the cleaning rod rotates, the push plate 40, through the slope 39, can push the push rod 38 towards the turbine 9 to close the second opening of the adjusting plate 36. As the cleaning rod rotates, the push plate 40, through its cooperation with the slope 39 of the push rod 38, can push the push rod 38 towards the turbine 9. The push plate 40 has a holding surface on the side opposite to the push rod 38. After the push rod 38 moves towards the turbine 9, it can abut against the holding surface. During the time period when the push rod 38 abuts against the holding surface, the adjusting plate 36 always closes the second opening. During this time period, the air pressure on the side of the second opening near the turbine 9 is accumulated, so that when the adjusting plate 36 opens the second opening, the pressure can be released instantly.

[0081] The push plate 40 is made of magnetic material. A magnetic block 41 is provided on the side of the substrate 33 facing away from the turbine 9. The magnetic poles of the magnetic block 41 are opposite to the magnetic poles of the push plate 40. When the push plate 40 and the magnetic block 41 are attracted together, the adjustment plate 36 does not close the second opening.

[0082] In addition, it should be noted that the elastic force of the first elastic element should be appropriate, such that the fluid applies pressure to the adjusting plate 36 without closing the second opening, and the gas blowing force provided by the purging assembly should enable the turbine 9 to rotate normally.

[0083] See Figure 5-6 In the fluid flow measurement state, the first elastic element is in its natural state, and the adjusting plate 36 does not close the second opening. At this time, the push plate 40 and the magnetic block 41 are attracted together due to their opposite magnetic poles, restricting the movement of the push plate 40, thereby keeping the adjusting plate 36 in the open position, forming a stable fluid flow channel, which facilitates the measurement of fluid flow. (See also...) Figure 2-4When the blowing assembly operates, the first cleaning rod 25 rotates, and the push plate 40 at its end rotates accordingly. The push plate 40 contacts and applies force to the inclined surface 39 of the push rod 38, overcoming the attraction force of the magnetic block 41 on the push plate 40 (if present) and the elastic force of the first elastic element (the magnitude of the blowing force provided by the blowing assembly needs to be determined in advance so that it can smoothly drive the second rotating shaft 19 to rotate), pushing the push rod 38 to move towards the turbine 9. The push rod 38 drives the adjusting plate 36 to move, causing the adjusting plate 36 to close the second opening. Closing the second opening can accumulate air pressure. When the adjusting plate 36 opens the second opening in a subsequent process, the air pressure is released instantaneously, thereby producing a better back-blowing effect on the first filter screen 34, which helps to clean the impurities on the first filter screen 34. When the blowing assembly stops operating, the first cleaning rod 25 stops rotating, and the push plate 40 no longer applies force to the push rod 38. The push plate 40 will be attracted to the magnetic block 41, the push rod 38 and the adjusting plate 36 will return to their original state, and the second opening will be reopened, thus preparing for the next fluid flow measurement.

[0084] In practical implementation:

[0085] ① During the turbine 9 blade cleaning process, the first cleaning rod 25 rotates continuously, and the push plate 40 on it pushes the push rod 38 to move, which in turn drives the adjusting plate 36 to move towards the second opening until the second opening is closed. After the push plate 40 passes the push rod 38, the holding surface will abut against the end of the push rod 38 away from the turbine 9. During the time that the holding surface abuts against the push rod 38, the adjusting plate 36 remains in a closed state, which provides sufficient time for the air pressure to accumulate. After the push plate 40 passes the push rod 38, the push rod 38 returns to its original position under the action of the first elastic element, and the second opening is opened. At this time, the accumulated air pressure is released instantly, which can produce a better back-blowing effect on the first filter screen 34, thereby more effectively cleaning the impurities attached to the first filter screen 34.

[0086] ② The design cleverly links the rotation of the first cleaning rod 25 with the opening and closing of the second opening by the adjusting plate 36 through the push plate 40 and the push rod 38. It is not only ingeniously conceived, but also convenient to operate and highly automated.

[0087] See Figure 7In this embodiment, there are multiple second air inlets 8, arranged along the length of the second component 2. The number of first air inlets 5 is the same as the number of second air inlets 8. When the sealing plate 16 closes the end of the second component 2, the first air inlets 5 and the second air inlets 8 correspond to each other. Since multiple second air inlets 8 are arranged along the length of the second component 2, the air intake position of the purging assembly is different when different second air inlets 8 are opened. Gas entering from different second air inlets 8 will be blown out in different directions and ranges, thereby changing the purging range of the purging assembly. For example, when a second air inlet 8 near one end of the second component 2 is opened, the purging range may be biased to one side; while when a second air inlet 8 in the middle position is opened, the purging range will be more concentrated in the middle area. It can be seen that when multiple second air inlets 8 are opened at the same time, the purging range naturally increases.

[0088] See Figure 7-9 In this embodiment, the purging assembly includes an air pump 42, an installation pipe 43, and an adjustment pipe 44. The air pump 42 is installed outside the first component 1 and serves as the air source supply device for the entire purging assembly, responsible for compressing and delivering the gas to provide power for the purging action. The installation pipe 43 is integrally connected to the outside of the first component 1, and the end of the first air inlet 5 away from the second component 2 extends into the interior of the installation pipe 43, allowing gas to enter the first air inlet 5 through the installation pipe 43.

[0089] The regulating pipe 44 is located inside the mounting pipe 43. The outer wall of the regulating pipe 44 abuts against the inner wall of the mounting pipe 43. The regulating pipe 44 is rotatably and sealed inside the mounting pipe 43. The regulating pipe 44 can rotate about the axis of the mounting pipe 43. The regulating pipe 44 is provided with a drive blade 45 that can drive the regulating pipe 44 to rotate when the gas flows. The outer wall of the regulating pipe 44 is provided with the same number of air guide holes 46 as the first air inlet 5. The multiple air guide holes 46 are spirally arranged along the circumference of the regulating pipe 44. During the rotation of the regulating pipe 44, the multiple air guide holes 46 successively coincide with the multiple first air inlets.

[0090] An air guide pipe 47 is provided between the air pump 42 and the mounting pipe 43. One end of the air guide pipe 47 is connected to the gas outlet of the air pump 42, and the other end is connected to one end of the mounting pipe 43. The end of the regulating pipe 44 near the air guide pipe 47 is open.

[0091] After the air pump 42 starts, it compresses the gas and delivers it to the mounting pipe 43 through the air guide pipe 47. Since the end of the regulating pipe 44 near the air guide pipe 47 is open, the gas first enters the interior of the regulating pipe 44. When the gas flows inside the regulating pipe 44, it exerts a force on the drive blades 45 inside the regulating pipe 44. According to the principles of fluid dynamics, the flow of gas drives the drive blades 45 to rotate, which in turn causes the regulating pipe 44 to rotate about the axis of the mounting pipe 43. Multiple air guide holes 46 on the outer wall of the regulating pipe 44 are spirally arranged along the circumference. During the rotation of the regulating pipe 44, the multiple air guide holes 46 will successively coincide with multiple first air inlets 5. That is to say, the first air inlets 5 will connect with the air guide holes 46 in sequence, so that the gas can only enter the subsequent purging channel through the currently coinciding air guide holes 46 and the first air inlets 5. This means that the purging assembly can cover the entire purging range defined by the first air inlets 5, and the purging range will not be reduced due to the connection of a single air inlet. In traditional purging methods, multiple first air inlets 5 may simultaneously allow air to enter, resulting in gas dispersion and relatively weak purging intensity. However, in this new design, as the regulating pipe 44 rotates, multiple air guide holes 46 sequentially overlap with multiple first air inlets 5, ensuring that only a single first air inlet 5 is connected at any given time. This concentrates the gas output from the air pump 42 into the purging area through this single first air inlet 5, significantly enhancing the purging intensity while maintaining the purging range, thus more effectively removing impurities from the turbine blades 9.

[0092] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A turbine flow meter, characterized in that, include: The first component has a strip-shaped hollow cavity inside. The first component is provided with a first inlet and a first outlet that communicate with both ends of the hollow cavity. The outer wall of the first component is provided with a first air inlet that communicates with the hollow cavity. The second component is a hollow strip structure and is disposed within the hollow cavity along the length of the hollow cavity. The outer wall of the second component is in contact with the interior of the hollow cavity. The second component can slide in a sealed manner along the length of the hollow cavity. The two ends of the second component are respectively provided with a second inlet and a second outlet communicating with the interior of the second component. The outer wall of the second component is provided with a second air inlet communicating with the hollow cavity. When the second component slides relative to the first component, the second air inlet can communicate with the first air inlet. A measuring component, comprising a turbine and a receiver, wherein the turbine is rotatably disposed inside a second component, the turbine axis direction being consistent with the length direction of the second component, and the receiver is disposed on a first component, the receiver being capable of obtaining different pulse signals according to different turbine rotation speeds; A purging assembly is mounted on a first component and is connected to a first air inlet. The purging assembly blows gas through the first air inlet and a second air inlet towards the turbine to clean the turbine blades. An adjustment component allows the second component to slide relative to the first component, thereby changing the relative position of the first and second components.

2. The turbine flow meter according to claim 1, characterized in that: The second component is a hollow cylindrical structure with open ends. Two circular sealing plates are rotatably connected inside the second component. The two sealing plates are located at both ends of the second component. Two first transmission components are respectively provided between the two sealing plates and the first component. Through the two first transmission components, the two sealing plates can be rotated synchronously when the second component slides relative to the first component. When the two sealing plates rotate synchronously to be perpendicular to the length direction of the second component, the two sealing plates close the interior of the second component. The first component has a first drain port on its outer wall that communicates with the hollow cavity, and the second component has a second drain port on its outer wall that communicates with the interior of the second component. When the two sealing plates are rotated to be perpendicular to the direction of the second component, the first drain port communicates with the second drain port, and the first air inlet communicates with the second air inlet.

3. A turbine flow meter according to claim 2, characterized in that: The second component has a filter assembly inside, which is located between two sealing plates. The filter assembly is located on the turbine side near the second inlet. The filter assembly has a first filter surface and a second filter surface on both sides. The first filter surface is located on the side of the filter assembly away from the turbine, and the second filter surface is located on the side of the filter assembly near the turbine. The first filter surface and the second filter surface are parallel and both are perpendicular to the length direction of the second component. The second drain outlet is located on one side of the first filter surface of the filter assembly, and the second air inlet is located on one side of the second filter surface of the filter assembly.

4. A turbine flow meter according to claim 3, characterized in that: The filter assembly is rotatably connected to a first shaft, the axis of the first shaft is aligned with the axis of the second component, both ends of the first shaft extend out of the filter assembly, and a first cleaning rod and a second cleaning rod are respectively provided at both ends of the first shaft, the first cleaning rod abuts against the first filter surface, and the second cleaning rod abuts against the second filter surface; The turbine has a second shaft, which is rotatably connected to a second component. A second transmission assembly is provided between the second shaft and the first shaft. Through the second transmission assembly, the rotation of the second shaft can drive the first shaft to rotate, thereby driving the cleaning rod to rotate.

5. A turbine flow meter according to claim 4, characterized in that: The direction in which the purging assembly blows the turbine to rotate is opposite to the direction in which the fluid drives the turbine to rotate. The second transmission assembly is a one-way transmission assembly. Through the one-way transmission assembly, when the purging assembly blows the turbine to rotate to make the second shaft rotate, it can drive the first shaft to rotate. When the fluid drives the turbine to rotate to make the second shaft rotate, it cannot drive the first shaft to rotate.

6. A turbine flow meter according to claim 5, characterized in that: The filter assembly includes a hollow substrate, which is fixed inside a second component. The substrate has a first opening on the side facing away from the turbine, and a first filter screen is disposed in the first opening. The side of the first filter screen facing away from the turbine is a first filter surface. The substrate has a second opening on the side facing the turbine, and a second filter screen is disposed in the second opening. The side of the second filter screen closer to the turbine is a second filter surface. An adjustment plate for closing the second opening is provided inside the substrate. The adjustment plate is sleeved on the first shaft. A first elastic member is provided between the adjustment plate and the substrate. When the first elastic member is in its natural state, the adjustment plate does not close the second opening. A push rod parallel to the length direction of the second component is provided on the adjustment plate. One end of the push rod is fixedly connected to the adjustment plate, and the other end extends through the substrate in a direction away from the turbine. The end of the push rod away from the turbine has an inclined surface. A push plate is provided at the end of the first cleaning rod. When the push plate rotates with the cleaning rod, it can push the push rod towards the turbine through the inclined surface to make the adjustment plate close the second opening. The push plate has a holding surface on the side opposite to the push rod. After the push rod moves towards the turbine, it can abut against the holding surface. During the time period when the push rod abuts against the holding surface, the adjustment plate always closes the second opening. The push plate is made of magnetic material. A magnetic block is provided on the side of the substrate facing away from the turbine. The magnetic poles of the magnetic block are opposite to the magnetic poles of the push plate. When the push plate and the magnetic block are attracted together, the adjustment plate does not close the second opening.

7. A turbine flow meter according to any one of claims 2-6, characterized in that: There are multiple second air inlets, which are arranged along the length of the second component. The number of first air inlets is the same as the number of second air inlets, and when the end of the second component is closed by the sealing plate, the first air inlets and the second air inlets correspond to each other and overlap.

8. A turbine flow meter according to claim 7, characterized in that: The purging assembly includes an air pump, an installation pipe, and an adjustment pipe. The air pump is installed outside the first component, and the installation pipe is integrally connected to the outside of the first component. The first air inlet extends into the installation pipe from the end away from the second component. The regulating tube is located inside the mounting tube, and the outer wall of the regulating tube abuts against the inner wall of the mounting tube. The regulating tube is rotatably and sealed inside the mounting tube. The regulating tube can rotate about the axis of the mounting tube. The regulating tube is provided with driving blades that can drive the regulating tube to rotate when the gas flows. The outer wall of the regulating tube has the same number of air guide holes as the first air inlet. The multiple air guide holes are spirally arranged along the circumference of the regulating tube. During the rotation of the regulating tube, the multiple air guide holes successively coincide with the multiple first air inlets. An air guide pipe is provided between the air pump and the installation pipe. One end of the air guide pipe is connected to the gas outlet of the air pump, and the other end is connected to one end of the installation pipe. The end of the regulating pipe near the air guide pipe is open.

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