Self-cleaning double-venturi flowmeter and processing technology thereof

Abstract

The invention discloses a self-cleaning double-venturi flow meter and a processing technology thereof, and belongs to the technical field of flow meters and processing technologies thereof, the self-cleaning double-venturi flow meter comprises a contraction end and an expansion end on a pipeline, and the contraction end and the expansion end are connected through a throat end; the guide cleaning mechanism comprises a rotating shaft installed on the pipeline, one end of the rotating shaft is fixedly connected to the first rotating handle, the other opposite end of the rotating shaft extends to an annular baffle at the center of the inner wall of the pipeline, and arc-shaped blocks arranged on pushing rods are arranged at the two ends of the outer portion of the annular baffle correspondingly; the arc-shaped block is provided with a fillet close to the liquid flowing direction, and the arc-shaped block is provided with a curved surface part connected with the annular baffle in an abutting mode. The technical problem that the actual use effect of the double-Venturi flow meter is poor due to the fact that the interior of a pipeline is generally arranged to be a fixing mechanism, adaptive flow adjustment cannot be conducted on the interior of the pipeline, and the structure of the double-Venturi flow meter cannot be conveniently adjusted according to the actual use condition to meet the use requirement can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of flowmeters and processing techniques thereof, and in particular relates to a self-cleaning double-Venturi flowmeter and a processing technique thereof. Background Art

[0002] The Venturi flowmeter is a commonly used device for measuring the flow rate in a pressurized pipeline. It is a differential pressure flowmeter and is commonly used to measure the flow rate of fluids such as air, natural gas, coal gas, and water. The Venturi tube flowmeter consists of three parts: the "contraction end", the "throat end", and the "diffusion end". It is characterized by its simple structure, wide range of applicable working conditions, and easy real-time monitoring.

[0003] advantage.

[0004] The working principle of the Venturi flowmeter is based on the law of conservation of energy, the Bernoulli equation and the equation of flow continuity. When the fluid passes through the Venturi flowmeter, the flow velocity gradually increases at the contraction end due to the gradual reduction of the pipe diameter. When the fluid enters the throat end, the flow velocity reaches the maximum value due to the sharp reduction of the pipe diameter. At the diffusion end, the flow velocity gradually decreases, and the kinetic energy of the fluid is converted into static pressure energy. By measuring the pressure difference between the contraction section and the throat section, the flow rate of the fluid can be inferred.

[0005] In the prior art, when monitoring liquid substances, since the interior of the pipeline is usually a fixed structure, it is impossible to adaptively adjust the flow rate required inside the pipeline, and it is also impossible to conveniently adjust the structure itself according to actual usage to meet usage requirements, resulting in poor actual use effect of the existing double venturi flowmeter. At the same time, during long-term use, foreign matter is likely to adhere to the inner wall of the existing double venturi flowmeter, thereby affecting the actual measurement accuracy of the existing vortex flowmeter, and then disassembly, cleaning and maintenance are required. The disassembly process is relatively unchanged, which reduces work efficiency. At the same time, due to the flow collision of the liquid at the corners of the pipeline, noise is also more likely to be generated, thereby affecting the surrounding working environment. Summary of the invention

[0006] The purpose of the present invention is to provide a self-cleaning dual Venturi flowmeter and its processing technology to solve the technical problem that the existing dual Venturi flowmeter is poor in actual use effect because the pipeline is usually equipped with a fixed mechanism, which makes it impossible to adaptively adjust the flow rate inside the pipeline and conveniently adjust its own structure according to actual use conditions to meet the use needs.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A self-cleaning dual venturi flowmeter comprises a contraction end and an expansion end on a pipeline, wherein the contraction end and the expansion end are connected via a throat end; A guide cleaning mechanism, the guide cleaning mechanism comprising a rotating shaft installed on the pipeline, one end of the rotating shaft is fixedly connected to the first rotating handle, and the other end extends to an annular baffle on the center of the inner wall of the pipeline, both ends of the outer side of the annular baffle are provided with arc blocks placed on the push rod, the arc blocks are provided with rounded corners close to the liquid flow direction, and the arc blocks are provided with a curved surface portion that contacts and connects with the annular baffle; One end of the push rod is installed on the first gear plate, the first gear plate and the side wall of the pipeline are connected by a compression spring, the outer wall of the first gear plate is driven by the second gear plate through rotating gear meshing, the first gear plate and the second gear plate are vertically staggered, and the extension of one end of the second gear plate is installed on the cleaning brush, the cleaning brush is arranged in a ring shape and is connected with a slide groove along the length direction of the inner wall of the pipeline.

[0008] Furthermore, the arc block is symmetrically arranged relative to the center of the annular baffle. As the first rotating handle drives the annular baffle to rotate, the flow in the pipeline increases or decreases. At the same time, the curved surface part on the arc block contacts and fits with the annular baffle. Under the action of the driving force, the cleaning brush performs reciprocating horizontal movement to clean the inner wall of the pipeline.

[0009] Furthermore, it also includes an adjustable silencer mechanism, which includes a screw shaft installed on the pipe, one end of the screw shaft is connected to the outer wall of the pipe by a bearing, and the other end is fixed to the second handle, and a slider fixed on the lifting rod is spirally transmitted on the screw shaft, and the bottom end of the lifting rod passes through the pipe and extends to a baffle plate inside the pipe, and the baffle plate is provided with a guide groove placed on the inner wall of the pipe.

[0010] Furthermore, both ends of the outer wall of the baffle plate are integrally formed with protrusions, the protrusions and the movable plate are connected by a swing rod, the outer wall of the movable plate is connected with a movable groove along the length direction of the pipe side wall, and one end of the movable plate is connected to a silencer component placed at the corner of the pipe through a bending rod.

[0011] Furthermore, the silencer assembly includes a silencer box and a silencer plate movably connected to the two ends of the inner wall of the silencer box, one end of the silencer plate is correspondingly connected to the bending rod, and the silencer plate is provided with a silencer hole adapted thereto, a silencer cavity is formed between the inner wall of the silencer box and the silencer plate, and mounting holes connected to the pipe are provided at both ends of the corners of the outer wall of the silencer box, and the silencer plate is connected with a slide groove along the length direction of the inner wall of the silencer box.

[0012] Furthermore, one end of the bending rod is connected to the silencer plate by plug-in installation, and the silencer box is provided with an opening connected to the bending rod.

[0013] Furthermore, both ends of the swing rod are installed on the baffle plate and the movable plate by means of rotational connection, an active cavity connected to the swing rod is formed between the guide groove and the inner wall of the pipe, and a sealing ring connected to the movable plate is installed on the side wall of the pipe.

[0014] The self-cleaning dual venturi flowmeter processing technology includes the following steps: S1.1. When the liquid flow in the pipeline needs to be adjusted to be larger or smaller, the first handle is turned, and the first handle drives the annular baffle to rotate, so that the liquid flow on the pipeline is adaptively adjusted. At the same time, the annular baffle will contact and fit with the arc block during the rotation process. Under the driving force, the cleaning brush cleans the inner wall of the pipeline; S1.2. Turn the second handle. During the rotation of the screw shaft, the shielding plate moves up and down through the spiral transmission. The shielding plate cooperates with the guide groove on the inner wall of the pipeline to adaptively adjust the liquid flow rate. S1.3, step S1.2 During the up and down movement of the shielding plate, the rotating connection of the swing rod is used to drive the silencers at both ends to move in opposite directions through the bending rod. During the movement of the silencer plate, the volume of the silencer cavity increases or decreases to adapt to the different vibration amplitudes generated by the noise at the corners of the pipeline.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: A guide cleaning mechanism is provided, and the rotation of the first rotating handle drives the rotating shaft to rotate synchronously. At this time, the annular baffle on the rotating shaft rotates from a state perpendicular to the pipe cross-section to a state parallel to the pipe cross-section, so that the transported liquid can only be injected into the flow meter body through the guide hole and the gap between the guide groove and the inner wall of the pipe. During the rotation of the annular baffle, the flow rate can be adaptively adjusted, and corresponding compensation adjustments can be made for too slow or too fast flow rates. During the rotation of the annular baffle, the arc block on the push rod can be pushed, and the compression spring and the meshing transmission between the gears can drive the cleaning brush to effectively clean the attachments on the inner wall of the pipe, and under the action of the flow of the liquid, the accumulation of solid particles in the liquid can be prevented, so that the flow meter body can be disassembled without having to, and at the same time, the flow meter body can be cleaned under the condition of liquid transportation, so that the flow meter body can efficiently realize its functions, thereby improving the application effect of the device.

[0016] An adjustable silencer mechanism is provided. When the specification of the connecting pipe is small and the internal liquid flow rate is low, or when the specification of the connecting pipe is large and the internal liquid flow rate is fast, the second turning handle is rotated to drive the rotation of the screw shaft. Under the action of the spiral transmission, the lifting rod on the slider drives the baffle plate to move up and down together. During the up and down movement of the baffle plate, the guide groove on the inner wall of the pipeline can be correspondingly enlarged or reduced, so that the liquid flow rate is increased or decreased accordingly. In addition, the spiral transmission has self-locking properties and can be fixed at the corresponding position, which makes it convenient to fix the baffle plate at the corresponding height and is not easy to separate from the guide groove. Moreover, the vibration amplitudes generated at the corners of the pipeline with different liquid flow rates are different. During the movement of the baffle plate, the silencer plate can be driven to move in the opposite direction through the transmission member, and then the volume size in the silencer chamber is changed to effectively adapt to the vibration amplitude of different noises. In combination with the silencer holes on the silencer plate, the noise reduction purpose can be effectively achieved, effectively ensuring a comfortable and quiet working environment.

[0017] A silencer assembly is provided, a socket is opened on the silencer plate and a bending rod is connected by plug-in installation. The structural connection is stable, and when the structural parts are damaged, it is convenient to install and disassemble, which is beneficial to personnel operation. The installation hole on the silencer box is arranged to provide corresponding fixed support space for the pipe connection at the corner, which effectively improves the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a self-cleaning dual Venturi flowmeter of the present invention; Figure 2 is a front view of the self-cleaning dual venturi flowmeter of the present invention; Figure 3 is an internal schematic diagram of a self-cleaning dual venturi flowmeter of the present invention; Figure 4 The present invention Figure 3 A magnified image of point A; Figure 5 It is a structural schematic diagram of the arc block of the present invention; Figure 6 Schematic diagram of meshing transmission of rotating gears of the present invention; Figure 7 is a schematic diagram of the adjustment muffler mechanism of the present invention; Figure 8 It is a schematic diagram of the structure of the muffler box of the present invention; Fig. 9 It is a schematic flow chart of the processing technology of the self-cleaning dual Venturi flowmeter of the present invention.

[0020] Figure numerals: 1. contraction end; 2. expansion end; 3. throat end; 4. guide cleaning mechanism; 5. rotating shaft; 6. first rotating handle; 7. annular baffle; 8. push rod; 9. arc block; 10. fillet; 11. curved surface; 12. first gear plate; 13. compression spring; 14. rotating gear; 15. second gear plate; 16. cleaning brush; 17. adjustment silencer mechanism; 18. screw shaft; 19. second rotating handle; 20. lifting rod; 21. slider; 22. baffle plate; 23. guide groove; 24. movable plate; 25. swing rod; 26. bending rod; 27. silencer assembly; 28. silencer box; 29. ​​silencer plate; 30. silencer hole; 31. silencer cavity; 32. mounting hole. DETAILED DESCRIPTION

[0021] 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.

[0022] Reference Manual Attached Figure 1 and attached Figure 2 As shown, a self-cleaning dual venturi flowmeter comprises a contraction end 1 and an expansion end 2 on a pipeline, the contraction end 1 and the expansion end 2 are connected via a throat end 3; a guide cleaning mechanism 4, the guide cleaning mechanism 4 comprises a rotating shaft 5 installed on the pipeline, one end of the rotating shaft 5 is fixedly connected to a first rotating handle 6, and the other end extends to an annular baffle 7 on the center of the inner wall of the pipeline, and both ends of the outer side of the annular baffle 7 are provided with arc blocks 9 placed on a push rod 8, the arc block 9 is provided with a fillet 10 close to the liquid flow direction, and the arc block 9 is provided with a curved surface portion 11 that is in contact with the annular baffle 7; One end of the push rod 8 is installed on the first gear plate 12, the first gear plate 12 and the side wall of the pipeline are connected by a compression spring 13, the outer wall of the first gear plate 12 is meshed with the second gear plate 15 through a rotating tooth 14, the first gear plate 12 and the second gear plate 15 are vertically staggered, and the extension of one end of the second gear plate 15 is installed on the cleaning brush 16, the cleaning brush 16 is arranged in a ring shape and is connected with a slide groove along the length direction of the inner wall of the pipeline.

[0023] Specifically, the contraction end 1 and expansion end 2 as well as the throat end 3 on the pipeline are arranged to convert the pressure difference into a signal and transmit it to the flow meter for display feedback. Both ends of the pipeline are provided with mounting flanges, so that the corresponding connection with the external pipeline can be effectively achieved. A positioning hole connected to the rotating shaft 5 is opened on the pipeline, which can provide a movable space for the movement of the rotating shaft 5 on the one hand, and prevent the rotating shaft 5 from deviating from its position during the movement, thereby improving the working accuracy of the transmission parts.

[0024] refer to Figure 3 , Figure 4 , Figure 5 and Figure 6 The arc block 9 is symmetrically arranged relative to the center of the annular baffle 7. As the first rotating handle 6 drives the annular baffle 7 to rotate, the flow in the pipeline increases or decreases. At the same time, the curved surface 11 on the arc block 9 contacts and fits with the annular baffle 7. Under the action of the driving force, the cleaning brush 16 reciprocates horizontally to clean the inner wall of the pipeline.

[0025] Specifically, the symmetrical arrangement of the arc block 9 can transmit the reciprocating rotational force of the annular baffle 7 to the arc block 9, and the rounded corner 10 on the arc block 9 can reduce the resistance of the collision when the liquid flows through, thereby effectively ensuring that the liquid can flow freely and preventing large resistance from affecting the accuracy of flow data detection. In addition, the curved surface 11 on the arc block 9 cooperates with the arc surface of the annular baffle 7 that collides with the initial position of the annular baffle 7 to reduce the collision force by increasing the contact surface. Moreover, during the rotation of the annular baffle 7, most of the force can be transmitted to the vertical push rod 8 through the curved surface 11. During the movement of the push rod 8, the first gear plate 12 is driven to move toward the compression spring 13. Under the meshing transmission action of the rotating teeth 14, the second gear plate 15 in the horizontal direction can drive the cleaning brush 16 to move synchronously, and with the help of the elastic restoring force of the compression spring 13, the cleaning brush 16 can be driven to move in the opposite direction. During the reciprocating motion of the cleaning brush 16, the particles attached to the inner wall of the pipeline can be effectively removed to prevent affecting the normal flow detection work.

[0026] Specifically, the first gear plate 12, the compression spring 13, the rotating tooth 14 and the second gear plate 15 are all arranged in a shell in the shape of a strip of the inner wall of the pipe. At the same time, the central axis of the rotating tooth 14 is fixed and rotated on the inner wall of the shell. In this way, the first gear plate 12 is subjected to a force, and through the gear meshing transmission action and the elastic restoring force of the spring, the second gear plate 15 can drive the cleaning mechanism to perform reciprocating cleaning work.

[0027] A guide cleaning mechanism 4 is provided, and the rotation of the first rotating handle 6 drives the rotating shaft 5 to rotate synchronously. At this time, the annular baffle 7 on the rotating shaft 5 rotates from a state perpendicular to the pipe cross-section to a state parallel to the pipe cross-section, so that the transported liquid can only be injected into the flow meter body through the guide hole and the gap between the guide groove and the inner wall of the pipe. During the rotation of the annular baffle 7, the flow rate can be adaptively adjusted, and corresponding compensation adjustment can be made for the slow or fast flow rate. During the rotation of the annular baffle 7, the arc block 9 on the push rod 8 can be pushed, and the compression spring 13 and the meshing transmission between the gears can drive the cleaning brush 16 to effectively clean the attachments on the inner wall of the pipe, and under the flow of the liquid, the accumulation of solid particles in the liquid can be prevented, so that the flow meter body can be disassembled without having to ensure that the inside of the flow meter body is cleaned under the condition of liquid transportation, so as to ensure that the flow meter body can efficiently realize its functions, thereby improving the application effect of the device.

[0028] The first gear plate 12 and the second gear plate 15 are vertically arranged in an alternating manner. On the one hand, it can avoid interference between the transmission parts during movement, so that the first gear plate 12 and the second gear plate 15 can move normally respectively. On the other hand, the direction of the force can be converted, so that the horizontal Y-axis force is converted into the X-axis force. At the same time, the first gear plate 12, the second gear plate 15 and the outside of the rotating gear 14 are all placed in a T-shaped cover on the inner wall of the pipe, thereby providing effective safety protection for the above-mentioned structural parts.

[0029] refer to Figure 2 , Figure 7 and Figure 8 The self-cleaning dual venturi flowmeter also includes an adjusting silencer mechanism 17, which includes a screw shaft 18 installed on the pipeline, one end of the screw shaft 18 is connected to the outer wall of the pipeline through a bearing, and the other end is fixed to the second handle 19. The screw shaft 18 is spirally driven with a slider 21 fixed on the lifting rod 20. The bottom end of the lifting rod 20 passes through the pipeline and extends to a baffle plate 22 inside the pipeline. The baffle plate 22 is provided with a guide groove 23 placed on the inner wall of the pipeline.

[0030] An adjustable silencer mechanism 17 is provided. When the specification of the connecting pipe is small and the internal liquid flow rate is low, or when the specification of the connecting pipe is large and the internal liquid flow rate is fast, the second rotating handle 19 is rotated to drive the rotation of the screw shaft 18. Under the action of the spiral transmission, the lifting rod 20 on the slider 21 drives the shielding plate 22 to move up and down together. During the up and down movement of the shielding plate 22, the guide groove 23 on the inner wall of the pipeline can be correspondingly enlarged or reduced, so that the liquid flow rate is correspondingly increased or reduced. In addition, the spiral transmission has a self-locking property and can be fixed at a corresponding position, so that the shielding plate 22 is convenient to be fixed at a corresponding height and is not easy to separate from the guide groove 23. Moreover, the vibration amplitudes generated at the corners of the pipeline at different liquid flow rates are different. During the movement of the shielding plate 22, the silencer 29 can be driven to move in the opposite direction through the transmission member, and then the volume size in the silencer cavity 31 is changed to effectively adapt to the vibration amplitude of different noises. In combination with the silencer hole 30 on the silencer plate 29, the noise reduction purpose can be effectively achieved, and a comfortable and quiet working environment is effectively guaranteed.

[0031] Both ends of the outer wall of the baffle plate 22 are integrally formed with protrusions, and the protrusions and the movable plate 24 are connected by a swing rod 25. The outer wall of the movable plate 24 is connected with a movable groove along the length direction of the side wall of the pipeline, and one end of the movable plate 24 is connected to a silencer assembly 27 placed at the corner of the pipeline through a bending rod 26. The silencer assembly 27 includes a silencer box 28 and a silencer plate 29 movably connected to both ends of the inner wall of the silencer box 28. One end of the silencer plate 29 is correspondingly connected to the bending rod 26, and the silencer plate 29 is provided with a silencer hole 30 adapted thereto. A silencer cavity 31 is formed between the inner wall of the silencer box 28 and the silencer plate 29, and both ends of the corner of the outer wall of the silencer box 28 are provided with mounting holes 32 connected to the pipeline, and the silencer plate 29 is connected with a slide groove along the length direction of the inner wall of the silencer box 28.

[0032] Specifically, the opening size of the guide groove 23 and the volume size of the silencer chamber 31 change synchronously. When the liquid flow rate is large, the second turning handle 19 drives the screw shaft 18 to rotate, and drives the baffle plate 22 connected to the lifting rod 20 to move upward through the spiral transmission action. The liquid flow rate is reduced by expanding the guide groove 23. At this time, the vibration amplitude of the noise at the corner of the pipeline becomes smaller. During the upward movement of the baffle plate 22, with the help of the rotation connection of the swing rod 25, the silencer plates 29 at both ends can be driven to move in the center, and the volume of the silencer chamber 31 is reduced to adapt to the smaller noise vibration amplitude.

[0033] On the contrary, when the liquid flow rate is relatively high, the second turning handle 19 drives the rotation of the screw shaft 18, and drives the baffle plate 22 connected to the lifting rod 20 to move downward through the spiral transmission action, thereby increasing the liquid flow rate by narrowing the guide groove 23. At this time, the vibration amplitude of the noise at the corner of the pipeline becomes larger, and during the downward movement of the baffle plate 22, with the help of the rotation connection of the swing rod 25, the silencer plates 29 at both ends can be driven to move outward, thereby expanding the volume of the silencer chamber 31 to adapt to the larger noise vibration amplitude.

[0034] One end of the bending rod 26 is connected to the silencer plate 29 by plug-in installation, and the silencer box 28 is provided with an opening connected to the bending rod 26. Both ends of the swing rod 25 are installed on the baffle plate 22 and the movable plate 24 by rotational connection. An active cavity connected to the swing rod 25 is formed between the guide groove 23 and the inner wall of the pipe, and a sealing ring connected to the movable plate 24 is installed on the side wall of the pipe. The sealing ring can be installed on the side wall of the pipe by adhesive fixation, which helps to effectively connect and fix it to the pipe, and can also ensure the sealing of the joints of the structural parts to prevent liquid leakage.

[0035] A silencer assembly 27 is provided, a socket is provided on the silencer plate 29 and is connected to the bending rod 26 by plug-in installation. The structural connection is stable, and when the structural parts are damaged, it is convenient to install and disassemble, which is beneficial to personnel operation. The installation hole 32 on the silencer box 28 is provided to provide a corresponding fixed support space for the pipe connection at the corner, which effectively improves the safety of the device.

[0036] refer to Fig. 9 , the self-cleaning dual venturi flowmeter processing technology includes the following steps: S1.1. When the liquid flow in the pipeline needs to be adjusted to be larger or smaller, the first rotating handle 6 is rotated, and the first rotating handle 6 drives the annular baffle 7 to rotate, so that the liquid flow on the pipeline is adaptively adjusted. At the same time, the annular baffle 7 will contact and fit with the arc block 9 during the rotation process. Under the action of the driving force, the cleaning brush 16 cleans the inner wall of the pipeline; S1.2. Rotate the second handle 19. During the rotation of the lead screw shaft 18, the shielding plate 22 moves up and down through the spiral transmission. The shielding plate 22 cooperates with the guide groove 23 on the inner wall of the pipeline to adaptively adjust the liquid flow rate. S1.3, step S1.2 During the up and down movement of the baffle plate 22, in cooperation with the rotational connection of the swing rod 25, the silencer plates 29 at both ends are driven to move in the opposite direction through the bending rod 26. During the movement of the silencer plates 29, the volume of the silencer chamber 31 increases or decreases, thereby adapting to the vibration amplitudes of different sizes generated by the noise at the corners of the pipeline.

[0037] The whole operation and processing technology is reasonably designed, which can realize the stability detection of the flow in the pipeline, and can realize the flow compensation and adjustment of liquids with different flow rates. It can effectively eliminate the impurity particles attached to the pipeline and the collision noise of the liquid at the corner of the pipeline, effectively improve the use effect of the device, and facilitate personnel operation.

[0038] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0039] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. 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. Self-cleaning dual venturi flowmeter, characterized in that, It comprises a contraction end (1) and an expansion end (2) on a pipeline, wherein the contraction end (1) and the expansion end (2) are connected via a throat end (3); A guide cleaning mechanism (4), the guide cleaning mechanism (4) comprising a rotating shaft (5) mounted on the pipeline, one end of the rotating shaft (5) being fixedly connected to a first rotating handle (6), and the other end of the rotating shaft (5) extending to an annular baffle (7) at the center of the inner wall of the pipeline, both ends of the outer side of the annular baffle (7) being provided with arc blocks (9) placed on a push rod (8), the arc blocks (9) being provided with rounded corners (10) close to the flow direction of the liquid, and the arc blocks (9) being provided with a curved surface portion (11) which is in contact with the annular baffle (7); One end of the push rod (8) is mounted on a first gear plate (12); the first gear plate (12) and the side wall of the pipe are connected via a compression spring (13); the outer wall of the first gear plate (12) is meshed with a second gear plate (15) via rotating teeth (14); the first gear plate (12) and the second gear plate (15) are arranged vertically and staggered, and an extended portion of one end of the second gear plate (15) is mounted on a cleaning brush (16); the cleaning brush (16) is arranged in a ring shape and is connected to a slide groove along the length direction of the inner wall of the pipe.

2. The self-cleaning dual venturi flowmeter according to claim 1, characterized in that: The arc block (9) is symmetrically arranged relative to the center of the annular baffle (7). As the first rotating handle (6) drives the annular baffle (7) to rotate, the flow rate in the pipeline increases or decreases. At the same time, the curved surface portion (11) on the arc block (9) contacts and fits the annular baffle (7). Under the action of the driving force, the cleaning brush (16) performs reciprocating horizontal movement to clean the inner wall of the pipeline.

3. The self-cleaning dual venturi flowmeter according to claim 1, characterized in that: The invention also includes an adjustable silencer mechanism (17), wherein the adjustable silencer mechanism (17) includes a lead screw shaft (18) mounted on the pipe, one end of the lead screw shaft (18) is connected to the outer wall of the pipe via a bearing, and the other end is fixed to a second rotating handle (19), a slider (21) fixed to a lifting rod (20) is spirally driven on the lead screw shaft (18), the bottom end of the lifting rod (20) passes through the pipe and extends to a baffle plate (22) inside the pipe, and the baffle plate (22) is provided with a guide groove (23) disposed on the inner wall of the pipe.

4. The self-cleaning dual venturi flowmeter according to claim 1, characterized in that: Both ends of the outer wall of the shielding plate (22) are integrally formed with protrusions, the protrusions and the movable plate (24) are connected via a swing rod (25), the outer wall of the movable plate (24) is connected with a movable groove along the length direction of the side wall of the pipeline, and one end of the movable plate (24) is connected to a silencer component (27) placed at the corner of the pipeline via a bending rod (26).

5. The self-cleaning dual venturi flowmeter according to claim 4, characterized in that: The silencer assembly (27) comprises a silencer box (28) and a silencer plate (29) movably connected to two ends of the inner wall of the silencer box (28); one end of the silencer plate (29) is correspondingly connected to the bending rod (26); and the silencer plate (29) is provided with a silencer hole (30) adapted thereto; a silencer cavity (31) is formed between the inner wall of the silencer box (28) and the silencer plate (29); and mounting holes (32) connected to the pipeline are provided at both ends of the corners of the outer wall of the silencer box (28); and the silencer plate (29) is connected with a slide groove along the length direction of the inner wall of the silencer box (28).

6. The self-cleaning dual venturi flowmeter according to claim 5, characterized in that: One end of the bending rod (26) is connected to the silencer plate (29) by means of plug-in installation, and the silencer box (28) is provided with an opening connected to the bending rod (26).

7. The self-cleaning dual venturi flowmeter according to claim 4, characterized in that: Both ends of the swing rod (25) are mounted on the shielding plate (22) and the movable plate (24) by means of a rotational connection, a movable cavity connected to the swing rod (25) is formed between the guide groove (23) and the inner wall of the pipeline, and a sealing ring connected to the movable plate (24) is mounted on the side wall of the pipeline.

8. A self-cleaning dual venturi flowmeter processing technology, applied to the self-cleaning dual venturi flowmeter according to any one of claims 1 to 7, characterized in that: The steps include: S1.

1. When the flow rate of the liquid in the pipeline needs to be adjusted to be larger or smaller, the first rotating handle (6) is rotated, and the first rotating handle (6) drives the annular baffle (7) to rotate, so that the flow rate of the liquid in the pipeline is adaptively adjusted. At the same time, the annular baffle (7) will contact and fit with the arc block (9) during the rotation process. Under the action of the driving force, the cleaning brush (16) cleans the inner wall of the pipeline; S1.

2. Rotate the second rotating handle (19). During the rotation of the lead screw shaft (18), the shielding plate (22) moves up and down through the screw transmission action. The shielding plate (22) cooperates with the guide groove (23) on the inner wall of the pipeline to adaptively adjust the liquid flow rate. S1.3, step S1.2 During the up and down movement of the shielding plate (22), the rotating connection of the swing rod (25) is used to drive the silencer plates (29) at both ends to move in the opposite direction through the bending rod (26). During the movement of the silencer plates (29), the volume of the silencer chamber (31) increases or decreases, thereby adapting to the vibration amplitudes of different sizes generated by the noise at the corners of the pipeline.

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