High-precision porous balance flowmeter and processing technology thereof

Abstract

The invention discloses a high-precision porous balance flow meter and a processing technology thereof, and belongs to the technical field of flow meters and processing technologies thereof, the high-precision porous balance flow meter comprises a first pipeline and a second pipeline, and the first pipeline and the second pipeline are connected through a mounting pipe; the clamping and pushing mechanism comprises a bottom plate arranged on the first pipeline and the second pipeline, a frame fixedly connected with a motor is arranged on the bottom plate, an output shaft of the motor penetrates through the frame and extends to a reciprocating lead screw, and first sliding blocks are arranged at the two ends of the reciprocating lead screw in a spiral transmission mode. The top ends of the first sliding blocks are correspondingly and fixedly connected to the first pipeline and the second pipeline through bending rods. According to the invention, the technical problem that when the installation pipe is assembled with other pipelines, the model number is different or the diameter size difference is large frequently, so that when fluid passes through the pipeline and the installation pipe, the signal fluctuation is large due to the non-uniform fluid speed, and the numerical value of the measured flow in the pipeline is not accurate 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 high-precision multi-hole balanced flowmeter and processing techniques thereof. Background Art

[0002] The balanced flowmeter is a special differential pressure flowmeter. It adopts a unique equal Reynolds number, increases the thickness of the throttling piece and the processing accuracy to make the flow performance close to that of Venturi. The structure is still simple and safe, and the performance has a qualitative leap. The ingenious structural design can use a relatively small permanent pressure loss to exchange for a larger stable differential pressure under the shortest straight pipe section requirement, and achieve high-precision long-term stable measurement. Compared with the traditional throttling device, it has been improved to a certain extent. The flowmeter has significant features such as balanced rectification. The traditional throttling device has only one flow aperture, and the fluid loses its ideal state after throttling. Its working principle is the same as other differential pressure flowmeters.

[0003] The balanced flowmeter is based on the principle of energy conversion in a sealed pipe: in the case of an ideal fluid, the flow rate in the pipe is proportional to the square root of the differential pressure; the flow rate in the pipe can be calculated using the measured differential pressure value according to the Bernoulli equation.

[0004] During industrial installation, when the installation pipe is assembled with other pipes, there are often different models or large differences in diameter. As a result, when the fluid passes through the pipe and the installation pipe, the fluid velocity is uneven, which will cause large signal fluctuations, and directly lead to inaccurate values ​​of the flow in the measured pipe. The measurement accuracy will be reduced. At the same time, when the flow is detected on the pipeline, the pipes of different lengths cannot be clamped and fixed adaptively, which is not conducive to the stability of the flow detection work in the pipeline. Summary of the invention

[0005] The purpose of the present invention is to provide a high-precision multi-hole balanced flowmeter and its processing technology to solve the problem that when the installation pipe is assembled with other pipes, there are often different models or large differences in diameter sizes. As a result, when the fluid passes through the pipe and the installation pipe, the fluid velocity is uneven, which will cause large signal fluctuations, and directly lead to inaccurate numerical values ​​of the flow in the measured pipe.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A high-precision multi-hole balanced flowmeter comprises a first pipeline and a second pipeline, wherein the first pipeline and the second pipeline are connected via a mounting pipe: A supporting and pushing mechanism, the supporting and pushing mechanism comprises a bottom plate placed on the first pipe and the second pipe, the bottom plate is provided with a frame fixedly connected to the motor, the motor output shaft passes through the frame and extends to the reciprocating screw, both ends of the reciprocating screw are spirally driven with a first slider, the top end of the first slider is correspondingly fixedly connected to the first pipe and the second pipe through a bending rod, one end of the bending rod is installed on the first arc-shaped portion at the bottom of the first pipe and the second pipe through a bracket, and the other end is connected to a second slider distributed in the length direction of the bottom plate; The protrusions at the bottom ends of the first and second pipes and the lifting block are connected by a swing rod. The bottom of the lifting block passes through the cover and extends to the clamping assembly. As the first and second pipes align and move horizontally, the second arc-shaped portion on the clamping assembly contacts, fits or separates from the mounting pipe.

[0007] Furthermore, the clamping assembly includes a first gear plate fixed on the lifting block, the first gear plate is vertically meshed with a second tooth meshed with the first tooth, the central axes of the first tooth and the second tooth are connected to a movable shaft through a conveyor belt transmission, a pushing rod is connected to the movable shaft, the movable shafts are symmetrically arranged relative to the center of the cover body and maintain reverse rotation, one end of the pushing rod is integrally formed with the second arc portion, and a movable hole is opened on one side of the second arc portion along the outer wall of the cover body.

[0008] Furthermore, a rolling groove connected to the cover body is provided on the outer wall edge of the movable shaft, and both ends of the swing rod are installed on the protruding portion and the lifting block by a rotational connection. The top of the lifting block is connected to the third arc portion by a plug-in installation. As the second arc portion on the clamping assembly and the mounting tube are in contact, fit or separation, the third arc portion and the mounting tube are in contact, fit or separation synchronously.

[0009] Furthermore, it also includes a positioning and guiding mechanism, which includes a positioning rod fixed in a ring distribution on the first pipe, one end of the positioning rod is provided with a guide hole corresponding to the second pipe, and the top end of the positioning rod is provided with an inclined groove adapted to the positioning rod, and a self-locking component corresponding to the inclined groove on the positioning rod is installed on the second pipe.

[0010] Furthermore, the self-locking component includes a fixed block with a movable cavity inside, a button is installed on the top of the fixed block through a movable rod, the bottom of the movable rod is fixed to a movable plate, the outer wall of the movable plate is provided with a heart-shaped guide groove, the heart-shaped guide groove is provided with bevels all around, and the bevel at the top of the heart-shaped guide groove is recessed downward, the inner wall of the heart-shaped guide groove is movably connected to an extended end of a pull rod, the bottom of the pull rod is hinged on the side wall of the fixed block, and the movable plate and the bottom of the inner wall of the fixed block are connected by a compression spring.

[0011] Furthermore, one end of the movable plate is mounted on the resistance block through a connecting rod, and the resistance block is provided with an inclined surface corresponding to the inclined groove. The inclination angle of one end of the downwardly concave angle of the heart-shaped guide groove is 10-15 degrees greater than the inclination angle of the other end corner.

[0012] Furthermore, a flow meter connected to the sensing circuit is provided on the mounting pipe, the second slider is connected with a strip groove along the length direction of the bottom plate, and the openings of the first pipeline and the second pipeline are both connected with mounting flanges.

[0013] The high-precision multi-hole balanced flowmeter processing technology includes the following steps: S1.1. Place the balanced flow meter on the supporting and pushing mechanism. When the flow of the liquid needs to be measured, start the motor. Under the pushing action of the connecting piece, the first pipe and the second pipe move close to the center of the installation pipe. S1.2, step S1.1 After the motor is started, the openings at both ends of the installation pipe pass through the inner walls of the first pipe and the second pipe respectively and extend to the installation flange, and the liquid enters; S1.3, during the centering movement of the first pipe and the second pipe in step S1.1, the second arc-shaped portions at both ends rotate outwards and separate from the mounting pipe, and the third arc-shaped portion moves downwards and separates from the mounting pipe; S1.4. When the fluid flows in the installation pipe, its energy is converted from kinetic energy to pressure energy. The flow meter determines the flow rate of the fluid by measuring the pressure difference between two positions of the fluid in the installation pipe.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: (1) A supporting and pushing mechanism is provided to ensure the smoothness of the liquid when passing through the pipeline and the accuracy of the data, so that the first pipeline and the second pipeline at both ends are simultaneously aligned and moved together, so that the openings at both ends of the mounting pipe can be aligned and connected with the mounting flange, allowing the liquid to flow smoothly. After the motor is started, it drives the reciprocating screw to rotate. Under the action of the spiral transmission, the first pipeline and the second pipeline are driven to be aligned, moved together or separated at the same time through the bending rod. In addition, the first arc-shaped portion and the second slider provided on the bending rod can, on the one hand, effectively support and connect the pipelines, and on the other hand, ensure that the first pipeline and the second pipeline are prevented from deviating from their positions during the sliding process on the outer wall of the mounting pipe. The design is reasonable and the flow detection accuracy is improved.

[0015] (2) A clamping assembly is provided. When the first pipe and the second pipe move toward each other, it means that the length of the entire pipe is shortened. Therefore, more connecting parts are not required to achieve support and fixation. With the help of the rotation connection of the swing rod, the lifting block moves downward and separates from the mounting pipe through the third arc-shaped portion, so that the precise docking between the first pipe and the second pipe can be ensured. In addition, during the downward movement of the lifting block, under the action of the gear meshing transmission, the first rotating tooth and the second rotating tooth can be driven to rotate in the opposite direction, and under the transmission action of the conveyor belt, the second arc-shaped portions at both ends can be driven to rotate outward and separate from the outer wall of the mounting pipe at the same time. On the contrary, during the outward movement of the first pipe and the second pipe, the mounting pipe leaks out of the pipe, and the length of the pipe is thereby lengthened. During the upward movement of the third arc-shaped portion, the third arc-shaped portion and the mounting pipe are supported and fixed, and the second arc-shaped portions at both ends rotate inward and abut against the mounting pipe, which can effectively help the flow meter achieve effective support connection. By setting the clamping assembly, adaptive support connection can be achieved for pipes of different sizes, thereby improving the stability of the device.

[0016] (3) A positioning guide mechanism is provided. During the centering movement of the first pipe and the second pipe, the positioning rod cooperates with the guide hole to enable the pipe to be accurately positioned during the movement. In addition, in order to further achieve a limiting effect, the self-locking component is pressed so that during the pressing process, the resistance block on the connecting rod can be restrained by the inclined groove, which has a good positioning effect and prevents separation during the limiting process. During the pressing process again, the resistance block can be automatically ejected from the inclined groove, thereby ensuring the normal movement of the transmission part, facilitating personnel operation, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the structure of the high-precision multi-hole balanced flowmeter of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the high-precision multi-hole balanced flowmeter of the present invention. Figure 2 ; Figure 3 It is a front view of the high-precision multi-hole balanced flowmeter of the present invention; Figure 4 is a top view of the high-precision multi-hole balanced flowmeter of the present invention; Figure 5is an internal schematic diagram of the first pipeline and the second pipeline of the present invention; Figure 6 is a schematic structural diagram of the clamping assembly of the present invention; Figure 7 The present invention Figure 2 A magnified image of point A; Figure 8 It is a structural schematic diagram of the self-locking assembly of the present invention; Fig. 9 It is a schematic diagram of the process flow of the high-precision multi-hole balanced flowmeter manufacturing process of the present invention.

[0019] 1. First pipeline; 2. Second pipeline; 3. Mounting tube; 4. Supporting and pushing mechanism; 5. Motor; 6. Frame; 7. Reciprocating screw; 8. First slider; 9. First arc-shaped portion; 10. Second slider; 11. Lifting block; 12. Swing rod; 13. Cover body; 14. Clamping assembly; 15. Second arc-shaped portion; 16. First gear plate; 17. First rotating tooth; 18. Second rotating tooth; 19. Conveyor belt; 20. Movable shaft; 21. Push rod; 22. Third arc-shaped portion; 23. Positioning and guiding mechanism; 24. Positioning rod; 25. Guide hole; 26. Inclined groove; 27. Self-locking assembly; 28. Fixed block; 29. ​​Movable rod; 30. Button; 31. Moving plate; 32. Heart-shaped guide groove; 33. Pull rod; 34. Compression spring; 35. Connecting rod; 36. Resistance block; 37. Inclined surface; 38. Flow meter. DETAILED DESCRIPTION

[0020] 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.

[0021] Reference Manual Attached Figure 1 and attached Figure 2 As shown, a high-precision porous balanced flowmeter includes a first pipeline 1 and a second pipeline 2, which are connected by a mounting tube 3: a supporting pushing mechanism 4, which includes a base plate placed on the first pipeline 1 and the second pipeline 2, and a frame 6 fixedly connected to a motor 5 is provided on the base plate. The output shaft of the motor 5 passes through the frame 6 and extends to a reciprocating screw 7. Both ends of the reciprocating screw 7 are spirally driven with a first slider 8. The top end of the first slider 8 is fixedly connected to the first pipeline 1 and the second pipeline 2 through a bending rod. One end of the bending rod is installed on a first arc portion 9 at the bottom of the first pipeline 1 and the second pipeline 2 through a bracket, and the other end is connected to a second slider 10 distributed in the length direction of the base plate.

[0022] The protruding parts at the bottom ends of the first pipe 1 and the second pipe 2 are connected to the lifting block 11 through a swing rod 12. The bottom of the lifting block 11 passes through the cover body 13 and extends to the clamping assembly 14. As the first pipe 1 and the second pipe 2 move horizontally in alignment, the second arc-shaped part 15 on the clamping assembly 14 contacts, fits or separates from the mounting pipe 3.

[0023] A supporting and pushing mechanism 4 is provided to ensure the stability of the liquid when passing through the pipeline and the accuracy of the data, so that the first pipeline 1 and the second pipeline 2 at both ends can be simultaneously centered and moved together, so that the openings at both ends of the mounting tube 3 can be aligned and connected with the mounting flange, allowing the liquid to flow smoothly. After the motor 5 is started, it drives the reciprocating screw 7 to rotate, and under the action of the spiral transmission, the first pipeline 1 and the second pipeline 2 are driven to be simultaneously centered, brought together or separated through the bending rod. In addition, the first arc portion 9 and the second slider 10 provided on the bending rod can, on the one hand, effectively support and connect the pipelines, and on the other hand, ensure that the first pipeline 1 and the second pipeline 2 are prevented from deviating from the position during the sliding process on the outer wall of the mounting tube 3. The design is reasonable and the flow detection accuracy is improved.

[0024] Specifically, in order to avoid different fluid velocities of liquid in pipes of different diameters, thereby affecting the subsequent normal detection of liquid flow, during flow detection, the first pipe 1 and the second pipe 2 are moved in the center, so that the two ends of the mounting pipe 3 are directly connected to the mounting flange, so that the liquid can pass directly from the inside of the pipe, thereby obtaining a stable flow rate. When flow detection is not required, the first pipe 1 and the second pipe 2 are moved outward through the transmission member to ensure the normal length of the pipe itself, and the adjustable support member can be used to adaptively support and adjust pipes of different lengths, effectively improving the practicality of the device.

[0025] By extension, the strip groove setting on the bottom plate not only provides a space for the horizontal movement of the second slider 10, but also ensures the accuracy of the moving position. In addition, rollers can be adaptively added in the strip groove to help it move by rolling friction, and the rolling friction setting can greatly reduce the friction force and friction damage, thereby increasing the service life of the device.

[0026] refer to Figure 3 , Figure 5 and Figure 6The clamping assembly 14 includes a first gear plate 16 fixed on the lifting block 11, and the first gear plate 16 is meshed with a second rotating tooth 18 in a vertical direction and meshed with the first rotating tooth 17. The central axes of the first rotating tooth 17 and the second rotating tooth 18 are connected to a movable shaft 20 through a conveyor belt 19, and a pushing rod 21 is connected to the movable shaft 20. The movable shafts 20 are symmetrically arranged relative to the center of the cover body 13 and keep rotating in the opposite direction. One end of the pushing rod 21 is integrally formed with the second arc portion 15, and a movable hole is opened on one side of the second arc portion 15 along the outer wall of the cover body 13.

[0027] A rolling groove connected to the cover body 13 is provided on the outer wall edge of the movable shaft 20. Both ends of the swing rod 12 are installed on the protruding portion and the lifting block 11 by a rotational connection. The top of the lifting block 11 is connected to the third arc portion 22 by a plug-in installation. As the second arc portion 15 on the clamping assembly 14 and the mounting tube 3 are in contact with or separated from each other, the third arc portion 22 and the mounting tube 3 are in contact with or separated from each other synchronously.

[0028] During the centering movement of the first pipeline 1 and the second pipeline 2, the swing rod 12 is used to drive the lifting block 11 to move downward. During the downward movement of the lifting block 11, the second rotating tooth 18 can be driven to rotate counterclockwise. Due to the meshing transmission between the first rotating tooth 17 and the second rotating tooth 18, the first rotating tooth 17 can be driven to rotate clockwise. Then, under the transmission action of the conveyor belt 19, the movable shafts 20 at both ends can be driven to rotate in the opposite direction at the same time. During the reverse rotation of the movable shaft 20, the second arc-shaped portion 15 can be rotated outward, so that the second arc-shaped portion 15 can be separated from the mounting pipe 3. When the first pipeline 1 and the second pipeline 2 need to move outward, not only can the third arc-shaped portion 22 be supported and connected upward thereto, but the second arc-shaped portions 15 at both ends can be limited and fixed by rotating, contacting and fitting, thereby achieving a better supporting and connecting effect and ensuring the stability of the structural connection.

[0029] A clamping assembly 14 is provided. When the first pipe 1 and the second pipe 2 move toward each other in alignment, it means that the length of the entire pipe is shortened, and no more connecting parts are needed to achieve support and fixation. With the help of the rotation connection of the swing rod 12, the lifting block 11 moves downward and separates from the mounting pipe 3 through the third arc-shaped portion 22, so that the precise docking between the first pipe 1 and the second pipe 2 can be ensured. In addition, during the downward movement of the lifting block 11, under the gear meshing transmission, the first rotating tooth 17 and the second rotating tooth 18 can be driven to rotate in the opposite direction, and under the transmission action of the conveyor belt 19, the lifting block 11 can be driven to rotate in the opposite direction. The second arc-shaped portions 15 at both ends are driven to rotate outward and separate from the outer wall of the mounting tube 3. On the contrary, during the outward movement of the first pipe 1 and the second pipe 2, the mounting tube 3 leaks out of the pipe, and the pipe length is thereby lengthened. During the upward movement of the third arc-shaped portion 22, the third arc-shaped portion 22 and the mounting tube 3 are supported and fixed, and the second arc-shaped portions 15 at both ends are rotated inward and abutted against and limited on the mounting tube 3, which can effectively help the flow meter to achieve effective support connection. Through the setting of the clamping assembly 14, adaptive support connection can be achieved for pipes of different sizes, thereby improving the stability of the device operation.

[0030] refer to Figure 4 , Figure 7 and Figure 8 The high-precision porous balanced flowmeter also includes a positioning guide mechanism 23, which includes a positioning rod 24 fixed in an annular arrangement on the first pipe 1, one end of the positioning rod 24 is provided with a guide hole 25 corresponding to the second pipe 2, and the top of the positioning rod 24 is provided with an inclined groove 26 adapted thereto, and a self-locking component 27 corresponding to the inclined groove 26 on the positioning rod 24 is installed on the second pipe 2.

[0031] The self-locking component 27 includes a fixed block 28 with a movable cavity inside, a button 30 is installed on the top of the fixed block 28 through a movable rod 29, the bottom of the movable rod 29 is fixed on a movable plate 31, a heart-shaped guide groove 32 is provided on the outer wall of the movable plate 31, the heart-shaped guide groove 32 is provided with bevels all around, and the bevel at the top of the heart-shaped guide groove 32 is recessed downward, the inner wall of the heart-shaped guide groove 32 is movably connected to the extended end of a pull rod 33, the bottom of the pull rod 33 is hinged on the side wall of the fixed block 28, and the movable plate 31 and the bottom of the inner wall of the fixed block 28 are connected by a compression spring 34.

[0032] Specifically, one end of the movable plate 31 is mounted on the abutment block 36 through a connecting rod 35. The abutment block 36 is provided with an inclined surface 37 corresponding to the inclined groove 26. The inclination angle of one end of the downwardly concave angle of the heart-shaped guide groove 32 is 10-15 degrees greater than the inclination angle of the other end corner.

[0033] The inclination angle of the top of the heart-shaped guide groove 32 is set asymmetrically. In this way, due to the different inclination angles, the extended end on the pull rod 33 will fall into the bottom of the heart-shaped guide groove 32 through a place with a larger inclination angle during the movement. The movable plate 31 is lifted at this time and pulls the resistance block 36 to move upward, thereby separating the resistance block 36 and the positioning rod 24. During the pressing process again, with the help of the elastic recovery action of the compression spring 34, the pull rod 33 moves to the top of the heart-shaped guide groove 32, and the movable plate 31 is fixed in the center position. The movable plate 31 moves downward and is limited and fixed to the positioning rod 24 through the resistance block 36.

[0034] A positioning guide mechanism 23 is provided. During the centering movement of the first pipe 1 and the second pipe 2, the positioning rod 24 cooperates with the guide hole 25 to enable the pipe to be accurately positioned during the movement. In addition, in order to further achieve the limiting effect, by pressing the self-locking component 27, the abutment block 36 on the connecting rod 35 can abut against the inclined groove 26 during the pressing process, and the positioning effect is good, which prevents separation during the limiting process. During the pressing again, the abutment block 36 can be automatically ejected from the inclined groove 26 to ensure the normal movement of the transmission part, which is beneficial to personnel operation and improves work efficiency. A flow meter 38 connected to the sensor circuit is provided on the mounting pipe 3, and the second slider 10 is connected with a strip groove along the length direction of the bottom plate. The openings of the first pipe 1 and the second pipe 2 are both connected with mounting flanges.

[0035] refer to Fig. 9 , the high-precision multi-hole balanced flowmeter processing technology includes the following steps: S1.1. Place the balanced flow meter on the supporting and pushing mechanism 4. When the flow of the liquid needs to be measured, start the motor 5. Under the pushing action of the connecting piece, the first pipe 1 and the second pipe 2 move close to the center of the installation pipe 3; S1.2, step S1.1 After the motor 5 is started, the openings at both ends of the installation pipe 3 pass through the inner walls of the first pipe 1 and the second pipe 2 respectively and extend to the installation flange, and the liquid enters; S1.3, during the centering movement of the first pipe 1 and the second pipe 2 in step S1.1, the second arc-shaped portions 15 at both ends rotate outwards and separate from the mounting pipe 3, and at the same time, the third arc-shaped portion 22 moves downwards and separates from the mounting pipe 3; S1.4. When the fluid flows in the installation pipe 3, its energy is converted from kinetic energy to pressure energy. The flow meter determines the flow rate of the fluid by measuring the pressure difference between two positions of the fluid in the installation pipe 3.

[0036] The whole operation and processing technology is reasonably designed, which can realize the stability detection of the flow in the pipeline, and can also adaptively clamp and fix pipelines of different sizes, effectively improving the use effect of the device and facilitating personnel operation.

[0037] 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.

[0038] 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. High-precision porous balanced flowmeter, characterized in that: The invention comprises a first pipeline (1) and a second pipeline (2), wherein the first pipeline (1) and the second pipeline (2) are connected via a mounting pipe (3): A supporting and pushing mechanism (4), the supporting and pushing mechanism (4) comprising a base plate placed on the first pipe (1) and the second pipe (2), the base plate being provided with a frame (6) fixedly connected to the motor (5), the output shaft of the motor (5) passing through the frame (6) and extending to the reciprocating screw (7), the two ends of the reciprocating screw (7) being spirally driven with a first slider (8), the top end of the first slider (8) being correspondingly fixedly connected to the first pipe (1) and the second pipe (2) via a bending rod, one end of the bending rod being mounted on a first arc-shaped portion (9) at the bottom of the first pipe (1) and the second pipe (2) via a bracket, and the other end being connected to a second slider (10) distributed in the length direction of the base plate; The protruding portions at the bottom ends of the first pipe (1) and the second pipe (2) are connected to the lifting block (11) via a swing rod (12); the bottom of the lifting block (11) passes through the cover (13) and extends to the clamping assembly (14); as the first pipe (1) and the second pipe (2) are aligned and move horizontally, the second arc-shaped portion (15) on the clamping assembly (14) contacts, fits or separates from the mounting pipe (3).

2. The high-precision porous balanced flowmeter according to claim 1, characterized in that: The clamping assembly (14) comprises a first gear plate (16) fixed on the lifting block (11); the first gear plate (16) is meshed with a second rotating tooth (18) in a vertical direction and meshed with the first rotating tooth (17); the central axes of the first rotating tooth (17) and the second rotating tooth (18) are connected to a movable shaft (20) through a conveyor belt (19); a push rod (21) is connected to the movable shaft (20); the movable shafts (20) are symmetrically arranged relative to the center of the cover body (13) and rotate in opposite directions; one end of the push rod (21) is integrally formed with the second arc portion (15); and a movable hole is opened on one side of the second arc portion (15) along the outer wall of the cover body (13).

3. The high-precision porous balanced flowmeter according to claim 2, characterized in that: The outer wall edge of the movable shaft (20) is provided with a rolling groove connected to the cover body (13); both ends of the swing rod (12) are mounted on the protruding portion and the lifting block (11) by means of a rotational connection; the top of the lifting block (11) is connected to the third arc portion (22) by means of a plug-in installation; as the second arc portion (15) on the clamping assembly (14) and the mounting tube (3) come into contact with or separate from each other, the third arc portion (22) and the mounting tube (3) come into contact with or separate from each other synchronously.

4. The high-precision porous balanced flowmeter according to claim 1, characterized in that: The invention also comprises a positioning guide mechanism (23), wherein the positioning guide mechanism (23) comprises positioning rods (24) fixed on the first pipe (1) and arranged in an annular manner, wherein one end of the positioning rods (24) is provided with a guide hole (25) corresponding to the second pipe (2), and the top end of the positioning rods (24) is provided with an inclined groove (26) matching the second pipe (2), and the second pipe (2) is provided with a self-locking component (27) corresponding to the inclined groove (26) on the positioning rods (24).

5. The high-precision porous balanced flowmeter according to claim 4, characterized in that: The self-locking component (27) includes a fixed block (28) having an internal movable cavity, a button (30) being installed on the top of the fixed block (28) via a movable rod (29), the bottom of the movable rod (29) being fixed on a movable plate (31), the outer wall of the movable plate (31) being provided with a heart-shaped guide groove (32), the heart-shaped guide groove (32) being provided with bevels on all sides, and the bevel at the top of the heart-shaped guide groove (32) being recessed downward, the inner wall of the heart-shaped guide groove (32) being movably connected to an extended end of a pull rod (33), the bottom of the pull rod (33) being hinged on the side wall of the fixed block (28), and the movable plate (31) and the bottom of the inner wall of the fixed block (28) being connected via a compression spring (34).

6. The high-precision porous balanced flowmeter according to claim 5, characterized in that: One end of the movable plate (31) is mounted on a resisting block (36) via a connecting rod (35); the resisting block (36) is provided with an inclined surface (37) corresponding to the inclined groove (26); the inclined angle at one end of the downwardly concave angle of the heart-shaped guide groove (32) is greater than the inclined angle at the other end by 10-15 degrees.

7. The high-precision porous balanced flowmeter according to claim 1, characterized in that: The mounting pipe (3) is provided with a flow meter (38) connected to the sensing circuit, the second slider (10) is connected with a strip groove along the length direction of the bottom plate, and the openings of the first pipeline (1) and the second pipeline (2) are both connected with mounting flanges.

8. A high-precision multi-hole balanced flowmeter processing technology, applied to the high-precision multi-hole balanced flowmeter according to any one of claims 1 to 7, characterized in that: The steps include: S1.

1. Place the balanced flow meter on the supporting and pushing mechanism (4). When the flow of the liquid needs to be measured, start the motor (5). Under the pushing action of the connecting piece, the first pipe (1) and the second pipe (2) move closer to the center of the mounting pipe (3). S1.2, step S1.1: after the motor (5) is started, the openings at both ends of the mounting tube (3) pass through the inner walls of the first pipe (1) and the second pipe (2) respectively and extend to the mounting flange, and the liquid enters; S1.3, during the centering movement of the first pipe (1) and the second pipe (2) in step S1.1, the second arc-shaped portions (15) at both ends rotate outwards and separate from the mounting pipe (3), and at the same time, the third arc-shaped portion (22) moves downwards and separates from the mounting pipe (3); S1.

4. When the fluid flows in the installation pipe (3), its energy is converted from kinetic energy to pressure energy. The flow meter determines the flow rate of the fluid by measuring the pressure difference between two positions of the fluid in the installation pipe (3).

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