High-precision porous balanced flowmeter and its processing technology

Abstract

The present invention discloses a high-precision porous balanced flowmeter and its processing technology, belonging to the technical field of flowmeters and their processing technologies, including a first pipeline and a second pipeline, and the first pipeline and the second pipeline are connected by an installation pipe: a clamping and pushing mechanism, the clamping and pushing mechanism includes the first pipeline and the second pipeline placed on a bottom plate, 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 both ends of the reciprocating lead screw are in screw drive connection with a first slider, and the top of the first slider is fixedly connected to the first pipeline and the second pipeline respectively through a bent rod. The present invention can solve the technical problem that when the installation pipe is assembled with other pipelines, there are often situations where the models are different or the diameter sizes have a large gap, which will cause the fluid velocity to be uneven when the fluid passes through the pipeline and the installation pipe, resulting in large signal fluctuations, and directly leading to inaccurate numerical values of the flow rate in the measurement pipeline.

Description

Technical Field

[0001] The present invention belongs to the technical field of flow meters and their processing technologies, and particularly relates to a high-precision porous balanced flow meter and its processing technology. Background Art

[0002] A balanced flow meter is a relatively special differential pressure type flow meter. It adopts unique equal Reynolds numbers, increases the thickness of the throttling element and processing accuracy, making the flow performance close to that of a Venturi. Its structure is still simple and safe, and its performance has a qualitative leap. The ingenious structural design can, under the requirement of the shortest straight pipe section, use a relatively small permanent pressure loss to obtain a large stable differential pressure, realizing high-precision long-term stable measurement. It has certain improvements compared with traditional throttling devices. This flow meter has significant characteristics such as balanced rectification. Traditional throttling devices have only one flow aperture, and after throttling, the fluid loses its ideal state, and its working principle is the same as that of other differential pressure type flow meters.

[0003] The balanced flow meter is based on the principle of energy conversion in a sealed pipeline: in the case of an ideal fluid, the flow rate in the pipeline is proportional to the square root of the differential pressure; by measuring the differential pressure value, the flow rate in the pipeline can be calculated according to Bernoulli's equation.

[0004] During industrial installation, when the installation pipe is assembled with other pipes, there are often situations where the models are different or the diameter sizes have a large gap. As a result, when the fluid passes through the pipeline and the installation pipe, the uneven fluid velocity will cause large signal fluctuations, which will directly lead to inaccurate numerical values of the flow rate measured in the pipeline, reduce the measurement accuracy, and at the same time, when detecting the flow rate of the pipeline, it is not possible to adaptively clamp and fix pipes of different lengths and sizes, which is not conducive to the stability of the flow rate detection work in the pipeline. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-precision porous balanced flow meter and its processing technology to solve the technical problem that when the installation pipe is assembled with other pipes, there are often situations where the models are different or the diameter sizes have a large gap, resulting in large signal fluctuations due to uneven fluid velocity when the fluid passes through the pipeline and the installation pipe, and directly leading to inaccurate numerical values of the flow rate measured in the pipeline.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A high-precision porous balanced flow meter, including a first pipeline and a second pipeline, which are connected by an installation pipe:

[0008] The clamping and pushing mechanism, the clamping and pushing mechanism includes a first pipe and a second pipe placed on the bottom plate, a frame fixedly connected to the motor is provided on the bottom plate, the output shaft of the motor penetrates through the frame and extends to the reciprocating lead screw, and first sliders are helically driven at both ends of the reciprocating lead screw. The top of the first slider is correspondingly fixedly connected to the first pipe and the second pipe through a bent rod. One end of the bent rod is installed on the first arc part at the bottom of the first pipe and the second pipe through a bracket, and the relatively other end is connected to a second slider distributed in the length direction of the bottom plate;

[0009] The protruding part at the bottom of the first pipe and the second pipe is connected to the lifting block through a swing rod. The bottom of the lifting block penetrates through the cover body and extends to the clamping assembly. As the first pipe and the second pipe move horizontally in the center, the second arc part on the clamping assembly abuts and fits or separates from the installation pipe.

[0010] Further, the clamping assembly includes a first gear plate fixed on the lifting block. The first gear plate is meshed and driven vertically with a second rotating tooth that is meshed and driven with a first rotating tooth. The central axes of the first rotating tooth and the second rotating tooth are both connected to a movable shaft through a conveyor belt. A push rod is connected to the movable shaft. The movable shafts are symmetrically arranged relative to the center of the cover body and rotate in opposite directions. One end of the push rod is integrally formed with the second arc part, and a movable hole is opened along the outer wall of the cover body on one side of the second arc part.

[0011] Further, a rolling groove connected to the cover body is provided on the outer wall edge of the movable shaft. Both ends of the swing rod are installed on the protruding part and the lifting block through a rotating connection method. The top of the lifting block is connected to the third arc part through a plug-in installation method. As the second arc part on the clamping assembly abuts and fits or separates from the installation pipe, the third arc part abuts and fits or separates from the installation pipe synchronously.

[0012] Further, a positioning and guiding mechanism is also included. The positioning and guiding mechanism includes positioning rods annularly distributed and fixed on the first pipe. One end of the positioning rod is provided with a corresponding guiding hole on the second pipe, and an inclined groove adapted to it is opened at the top of the positioning rod. A self-locking component corresponding to the inclined groove on the positioning rod is installed on the second pipe.

[0013] Further, 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 on the moving plate. A heart-shaped guiding groove is opened on the outer wall of the moving plate. Chamfers are opened around the heart-shaped guiding groove, and the chamfer at the top of the heart-shaped guiding groove is set to be recessed downward. The extending end of a pull rod is movably connected to the inner wall of the heart-shaped guiding groove. The bottom of the pull rod is hinged on the side wall of the fixed block, and a compression spring is connected between the moving plate and the bottom inner wall of the fixed block.

[0014] 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 the downwardly concave corner of the heart-shaped guide groove at one end is 10-15 degrees greater than the inclination angle of the other end corner.

[0015] Furthermore, the mounting pipe is provided with a flow meter connected to the sensing circuit, the second slider is connected with a strip groove along the length direction of the bottom plate, and the openings of the first pipe and the second pipe are both connected with mounting flanges.

[0016] The high-precision multi-hole balanced flowmeter processing technology includes the following steps:

[0017] S1.1. Place the balancing flowmeter on the supporting mechanism. When the flow of liquid needs to be measured, start the motor. Under the driving force of the connector, the first and second pipes move closer to the center of the mounting pipe.

[0018] S1.2. After the motor is started in step S1.1, the openings at both ends of the mounting pipe pass through the inner walls of the first pipe and the second pipe respectively and extend to the mounting flange, allowing liquid to enter;

[0019] S1.3. During the alignment of the first and second pipes in step S1.1, the second arcuate portions at both ends rotate outward and separate from the mounting pipe, while the third arcuate portions move downward and separate from the mounting pipe.

[0020] 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 fluid flow rate by measuring the pressure difference between two locations of the fluid in the installation pipe.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] (1) A supporting and pushing mechanism is provided to ensure the smoothness of the liquid 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 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, prevent the first pipeline and the second pipeline from deviating from their positions during the sliding process on the outer wall of the mounting pipe. The design is reasonable and improves the flow detection accuracy.

[0023] (2) A clamping assembly is provided. When the first pipe and the second pipe move towards each other in alignment, it means that the overall length of the pipe is shortening, and thus fewer connecting pieces are required to achieve support and fixation. With the rotational connection of the swing rod, the lifting block moves downward and separates from the installation pipe through the third arc portion. This can ensure the precise docking between the first pipe and the second pipe. In addition, during the downward movement of the lifting block, under the action of gear meshing transmission, it can drive the reverse rotation of the first rotating tooth and the second rotating tooth, and under the transmission of the conveyor belt, it can drive the second arc portions at both ends to rotate outward and separate from the outer wall of the installation pipe. On the contrary, during the outward movement of the first pipe and the second pipe, the installation pipe leaks out from the pipe, and the pipe length also increases accordingly. During the upward movement of the third arc portion, the third arc portion is supported and fixed to the installation pipe, and the second arc portions at both ends rotate inward and are abutted and limited on the installation pipe, which can effectively help the flowmeter achieve effective support connection. Through the setting of the clamping assembly, it can achieve adaptive support connection for pipes of different sizes, improving the working stability of the device.

[0024] (3) A positioning and guiding mechanism is provided. During the alignment movement of the first pipe and the second pipe, the positioning rod cooperates with the guiding hole, enabling precise position positioning of the pipe during movement. In addition, to further enhance the limiting effect, by pressing the self-locking assembly, during the pressing process, the abutting block on the connecting rod can abut and be limited by the inclined groove, with good positioning effect and preventing separation during the limiting process. During the re-pressing process, the abutting block can be automatically ejected from the inclined groove, ensuring the normal movement of the transmission part, facilitating personnel operation, and improving work efficiency. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 is the structural schematic diagram of the high-precision multi-hole balanced flowmeter of the present invention Figure 1 ;

[0027] Figure 2 is the structural schematic diagram of the high-precision multi-hole balanced flowmeter of the present invention Figure 2 ;

[0028] Figure 3 is the front view of the high-precision multi-hole balanced flowmeter of the present invention;

[0029] Figure 41. It is a top view of the high-precision porous balanced flowmeter of the present invention;

[0030] Figure 5 is a schematic diagram of the interior of the first pipeline and the second pipeline of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the clamping assembly of the present invention;

[0032] Figure 7 This invention Figure 2 A magnified view of point A;

[0033] Figure 8 It is a structural schematic diagram of the self-locking assembly of the present invention;

[0034] Figure 9 It is a schematic flow chart of the processing technology of the high-precision multi-hole balanced flowmeter of the present invention.

[0035] Figure numerals: 1. first pipeline; 2. second pipeline; 3. mounting tube; 4. supporting 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. pushing rod; 22. third arc-shaped portion; 23. positioning guide mechanism; 24. positioning rod; 25. guide hole; 26. inclined groove; 27. self-locking assembly; 28. fixed block; 29. movable rod; 30. button; 31. movable 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

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0037] Reference Manual Figure 1 and attached Figure 2As shown, a high-precision porous balanced flowmeter includes a first pipe 1 and a second pipe 2, and the first pipe 1 and the second pipe 2 are connected by an installation pipe 3: a clamping and pushing mechanism 4. The clamping and pushing mechanism 4 includes the first pipe 1 and the second pipe 2 placed on a bottom plate. A frame 6 fixedly connected to a motor 5 is provided on the bottom plate. The output shaft of the motor 5 penetrates through the frame 6 and extends to a reciprocating lead screw 7. First sliders 8 are helically driven at both ends of the reciprocating lead screw 7. The top ends of the first sliders 8 are fixedly connected to the first pipe 1 and the second pipe 2 respectively through bent rods. One end of the bent rod is installed on a first arc portion 9 at the bottom of the first pipe 1 and the second pipe 2 through a bracket, and the relatively other end is connected to a second slider 10 distributed in the length direction of the bottom plate.

[0038] The protruding portions at the bottom ends of the first pipe 1 and the second pipe 2 are connected to a lifting block 11 through a swing rod 12. The bottom of the lifting block 11 penetrates through a cover body 13 and extends to a clamping assembly 14. As the first pipe 1 and the second pipe 2 move horizontally in alignment, the second arc portion 15 on the clamping assembly 14 abuts and fits or separates from the installation pipe 3.

[0039] The clamping and pushing mechanism 4 is provided to ensure the smoothness of the liquid passing through the pipe and the accuracy of the data, so that the first pipe 1 and the second pipe 2 at both ends move towards each other in alignment at the same time. In this way, the openings at both ends of the installation pipe 3 can be aligned and connected with the installation flange, allowing the liquid to flow smoothly. After the motor 5 is started, it drives the reciprocating lead screw 7 to rotate. Under the action of helical drive, the first pipe 1 and the second pipe 2 are driven to move towards or separate from each other in alignment through the bent rod. In addition, the first arc portion 9 and the second slider 10 provided on the bent rod can, on the one hand, effectively support and connect the pipe, and on the other hand, ensure that the first pipe 1 and the second pipe 2 do not deviate from their positions during the sliding process on the outer wall of the installation pipe 3. The design is reasonable and the flow detection accuracy is improved.

[0040] Specifically, in order to avoid different fluid velocities of the liquid in pipes with different diameters, which will affect the subsequent normal detection of the liquid flow rate, during the flow rate detection, through the alignment movement of the first pipe 1 and the second pipe 2, the two ends of the installation pipe 3 are directly docked with the installation flange, so that the liquid directly passes through the pipe interior, thereby obtaining a stable flow velocity. During the process when the flow rate detection is not required, the first pipe 1 and the second pipe 2 are moved outwards through transmission parts to ensure the normal length of the pipe itself. Moreover, through adjustable support parts, the pipes with different lengths can be adaptively supported and adjusted, effectively improving the practicability of the device.

[0041] 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 to the strip groove to help it move through rolling friction. The setting of rolling friction can greatly reduce friction and reduce friction damage, thereby increasing the service life of the device.

[0042] refer to Figure 3 、 Figure 5 and Figure 6 The clamping assembly 14 includes a first gear plate 16 fixed to the lifting block 11, and the first gear plate 16 is vertically meshed with a second rotating tooth 18 that is 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 maintain reverse rotation. One end of the push rod 21 is integrally formed with the second arc-shaped portion 15, and a movable hole is opened on one side of the second arc-shaped portion 15 along the outer wall of the cover body 13.

[0043] 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 installed on the protrusion 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 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.

[0044] During the centering movement of the first pipe 1 and the second pipe 2, the lifting block 11 is driven to move downward by means of the rotation connection of the swing rod 12. 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 curved portion 15 can be rotated outward, so that the second curved portion 15 can be separated from the mounting pipe 3. When the first pipe 1 and the second pipe 2 need to move outward, not only can the third curved portion 22 be supported and connected upward, but the second curved portions 15 at both ends can be limited and fixed by rotating and contacting, thereby achieving a better support and connection effect and ensuring the stability of the structural connection.

[0045] A clamping assembly 14 is provided. When the first pipe 1 and the second pipe 2 move toward the center, 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 portion 22. This ensures the precise docking between the first pipe 1 and the second pipe 2. In addition, during the downward movement of the lifting block 11, under the action of the gear meshing transmission, it can drive the first rotating tooth 17 and the second rotating tooth 18 to rotate in the opposite direction, and under the transmission action of the conveyor belt 19, it can allow 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 an 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.

[0046] 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 distribution on the first pipe 1, and a guide hole 25 corresponding to the second pipe 2 is provided at one end of the positioning rod 24, and an inclined groove 26 adapted thereto is provided on the top of the positioning rod 24, and a self-locking component 27 corresponding to the inclined groove 26 on the positioning rod 24 is installed on the second pipe 2.

[0047] The self-locking assembly 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 to 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 an oblique angle all around, and the oblique angle 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 the pull rod 33. The bottom of the pull rod 33 is hinged to 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.

[0048] Specifically, one end of the movable plate 31 is mounted on the resistance block 36 through a connecting rod 35. The resistance block 36 is provided with an inclined surface 37 corresponding to the inclined groove 26. The inclination angle of the downwardly concave corner of the heart-shaped guide groove 32 at one end is 10-15 degrees greater than the inclination angle at the other end.

[0049] The inclination angle at the top of the heart-shaped guide groove 32 is asymmetrically set. Due to the different inclination angles, during the movement of the extension end on the pull rod 33, it will fall to the bottom of the heart-shaped guide groove 32 through the part with a larger inclination angle. At this time, the moving plate 31 is lifted and pulls the abutting block 36 to move upward, so that the abutting block 36 is separated from the positioning rod 24. During the next pressing process, with the elastic recovery of the compression spring 34, the pull rod 33 moves to the top of the heart-shaped guide groove 32, and the moving plate 31 is fixed at the central position. The moving plate 31 moves downward and limits and fixes the positioning rod 24 through the abutting block 36.

[0050] A positioning and guiding mechanism 23 is provided. During the centering movement of the first pipeline 1 and the second pipeline 2, the positioning rod 24 cooperates with the guiding hole 25, which can enable the pipeline to be accurately positioned during the movement. In addition, to further enhance the limiting effect, by pressing the self-locking component 27, during the pressing process, the abutting block 36 on the connecting rod 35 can abut and limit with the inclined groove 26, with good positioning effect and preventing separation during the limiting process. During the next pressing process, the abutting 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 sensing line is provided on the installation pipe 3. The second slider 10 is connected with a strip-shaped groove along the length direction of the bottom plate. Installation flanges are connected to the openings of both the first pipeline 1 and the second pipeline 2.

[0051] Reference Figure 9 , a high-precision processing technology for a porous balanced flow meter, includes the following steps:

[0052] S1.1. Place the balanced flow meter on the clamping and pushing mechanism 4. When measuring the flow rate of the liquid, start the motor 5. Under the pushing action of the connecting piece, the first pipeline 1 and the second pipeline 2 move closer to the center of the installation pipe 3;

[0053] S1.2. After the motor 5 in step S1.1 is started, the two ends of the installation pipe 3 respectively pass through the inner walls of the first pipeline 1 and the second pipeline 2 and extend to the installation flange, and the liquid enters;

[0054] S1.3. During the centering movement of the first pipeline 1 and the second pipeline 2 in step S1.1, the second arc-shaped parts 15 at both ends rotate outward and separate from the installation pipe 3, and at the same time, the third arc-shaped part 22 moves downward and separates from the installation pipe 3;

[0055] S1.4. When the fluid flows in the installation pipe 3, its energy is converted from kinetic energy to pressure energy, and the flow meter determines the flow rate of the fluid by measuring the pressure difference at two positions inside the installation pipe 3.

[0056] The entire operation and processing technology is reasonably designed, capable of detecting the flow rate in the pipeline stably, and also capable of adaptively clamping and fixing pipelines of different sizes, effectively improving the use effect of the device and facilitating personnel operation.

[0057] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

[0058] 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 present invention to only the specific embodiments. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A high-precision porous balanced flowmeter, characterized in that, It includes a first pipeline (1) and a second pipeline (2), and the first pipeline (1) and the second pipeline (2) are connected by an installation pipe (3): A clamping and pushing mechanism (4), the clamping and pushing mechanism (4) includes the first pipeline (1) and the second pipeline (2) placed on a bottom plate, a frame (6) fixedly connected to a motor (5) is provided on the bottom plate, an output shaft of the motor (5) penetrates through the frame (6) and extends to a reciprocating lead screw (7), first sliders (8) are helically driven at both ends of the reciprocating lead screw (7), the top ends of the first sliders (8) are correspondingly fixedly connected to the first pipeline (1) and the second pipeline (2) through bent rods, one end of the bent rod is installed on a first arc portion (9) at the bottoms of the first pipeline (1) and the second pipeline (2) through a bracket, and the relatively other end is connected to a second slider (10) distributed in the length direction of the bottom plate; A protruding portion at the bottom ends of the first pipeline (1) and the second pipeline (2) and a lifting block (11) are connected by a swing rod (12), the bottom of the lifting block (11) penetrates through a cover body (13) and extends to a clamping assembly (14), and as the first pipeline (1) and the second pipeline (2) move horizontally in alignment, a second arc portion (15) on the clamping assembly (14) abuts against and fits or separates from the installation pipe (3).

2. The high-precision porous balanced flowmeter according to claim 1, wherein The clamping assembly (14) includes a first gear plate (16) fixed to the lifting block (11), a second rotating tooth (18) meshing and driving with a first rotating tooth (17) is meshing and driving in the vertical direction of the first gear plate (16), central shafts on the first rotating tooth (17) and the second rotating tooth (18) are both drivingly 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 with respect 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 provided 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, 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) in a rotatable connection manner, the top of the lifting block (11) is connected to a third arc portion (22) in a plug-in installation manner, and as the second arc portion (15) on the clamping assembly (14) abuts against and fits or separates from the installation pipe (3), the third arc portion (22) abuts against and fits or separates from the installation pipe (3) synchronously.

4. The high-precision porous balanced flowmeter according to claim 1, wherein It further includes a positioning and guiding mechanism (23), the positioning and guiding mechanism (23) includes positioning rods (24) annularly distributed and fixed on the first pipeline (1), a corresponding guiding hole (25) is provided at one end of the positioning rod (24) on the second pipeline (2), and an inclined groove (26) adapted to it is provided at the top end of the positioning rod (24), and a self-locking assembly (27) corresponding to the inclined groove (26) on the positioning rod (24) is installed on the second pipeline (2).

5. The high-precision porous balanced flowmeter according to claim 4, wherein The self-locking assembly (27) includes a fixed block (28) with an active cavity inside. The top of the fixed block (28) is provided with a button (30) installed through a movable rod (29). The bottom of the movable rod (29) is fixed on a movable plate (31). The outer wall of the movable plate (31) is provided with a heart-shaped guide groove (32). Chamfers are provided around the heart-shaped guide groove (32), and the chamfer at the top of the heart-shaped guide groove (32) is set to be 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 inner wall of the fixed block (28) are connected by a compression spring (34).

6. The high-precision porous balanced flowmeter according to claim 5, wherein One end of the movable plate (31) is installed on a contact block (36) through a connecting rod (35). The contact block (36) is provided with an inclined surface (37) corresponding to the inclined groove (26). The inclination angle at the corner of the chamfer at the recessed end of the heart-shaped guide groove (32) is 10-15 degrees greater than the inclination angle at the corner of the other end.

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

8. A processing technology for a high-precision porous balanced flowmeter, applied to the high-precision porous balanced flowmeter described in any one of claims 1-7, characterized in that, It includes the following steps: S1.

1. Place the balanced flow meter on the clamping and pushing mechanism (4). When the flow rate 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 installation pipe (3). S1.

2. After the motor (5) in step S1.1 is started, the two ends of the installation pipe (3) respectively pass through the inner walls of the first pipe (1) and the second pipe (2) and extend to the installation flanges, 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 parts (15) at both ends rotate outward and separate from the installation pipe (3), and at the same time, the third arc-shaped part (22) moves downward and separates from the installation 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 at two positions inside the installation pipe (3).

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