Vortex shedding flowmeter with improved resonant frequency of sensor

Abstract

The utility model relates to the technical field of vortex shedding flowmeters, in particular to a vortex shedding flowmeter with improved resonant frequency of a sensor, which is convenient to install, improves convenience during installation, facilitates cleaning of a vortex shedding generator, prevents the vortex shedding flowmeter from being dirty by a medium or wound by dirt, and improves measurement accuracy. Comprising a shell, an anti-interference sensor, a displayer, a vortex street generator, a dismounting assembly, a connecting assembly and a supporting assembly, a connecting flange is arranged on a pipeline, the left end and the right end of the shell are connected with the pipeline through cooperation of the connecting assembly and the connecting flange, and the middle of the shell is connected with the displayer through the anti-interference sensor; the vortex street generator is installed in the shell through a dismounting assembly, and a supporting assembly is installed at the bottom of the shell.

Description

Technical Field

[0001] The utility model relates to the technical field of vortex flowmeters, in particular to a vortex flowmeter with an improved sensor resonance frequency. Background Art

[0002] As a flowmeter with high precision, high reliability and wide application range, vortex flowmeter is becoming the future trend of the flowmeter industry. Vortex flowmeter is a velocity flowmeter made based on Karman vortex theory and the principle of natural vibration of fluid, using piezoelectric crystal or differential capacitor as the detection component. A new type of vortex flowmeter sensor proposed by prior art publication number CN2535777 adopts a piezoelectric ceramic disc vibration mode structure, and the piezoelectric ceramic disc is placed in the inner cavity of the probe housing, so that one end of the piezoelectric ceramic is directly attached to the bottom of the inner cavity of the probe housing, the terminal board is close to the other end of the piezoelectric ceramic, the pressure block presses the piezoelectric ceramic piece, and an insulating material is placed between the piezoelectric ceramic and the pressure block. The wires are respectively led out from the pressure block and the terminal board. The probe is a round rod structure, the top of the probe is a plane structure, and an annular groove is opened on the outer wall of the cavity of the probe housing. However, it has poor adaptability to measuring dirty media. The generator of the vortex flowmeter is easily contaminated by the medium or entangled by dirt. Under high flow rates, the fluid movement behind the vortex generator is more complicated. Multiple bolts are required for fixing during installation. The installation steps are relatively cumbersome, affecting the installation efficiency. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a vortex flowmeter with an improved sensor resonance frequency, which is easy to install, improves convenience during installation, facilitates cleaning of the vortex generator, avoids being contaminated by the medium or entangled by dirt, and improves measurement accuracy.

[0004] The utility model discloses a vortex flowmeter with improved sensor resonance frequency, comprising a shell, an anti-interference sensor, a display, a vortex generator, a disassembly component, a connection component and a support component. A connection flange is arranged on a pipeline, and the left and right ends of the shell are connected to the pipeline through the connection component and the connection flange. The middle part of the shell is connected to the display through the anti-interference sensor. The vortex generator is installed inside the shell through the disassembly component, and the bottom of the shell is installed with the support component. When in use, the shell is installed on the pipeline through the connection component and the connection flange, and multiple fixing bolts are not needed for connection, so the installation is convenient and the convenience during installation is improved. The support component can support and install the shell to ensure stability during use. The vortex generator is installed inside the shell through the disassembly component, and is a replaceable movable part, and the width can be changed to meet the requirements of different data measurements.

[0005] Preferably, the disassembly component includes a positioning plate and a sealing plug, an insertion hole is opened at the top left side of the shell, a positioning groove is opened at the bottom end of the inner wall of the shell at a position corresponding to the insertion hole, the bottom of the vortex generator is fixedly connected to the positioning plate, the positioning plate matches the positioning groove, the top of the vortex generator is fixedly connected to the sealing plug, the sealing plug is set to a shape matching the insertion hole, and the top of the sealing plug is provided with an arc-shaped fixing plate matching the outer wall of the shell, fixing holes are opened on the arc-shaped fixing plate and the outer wall of the shell, and multiple bolts pass through the fixing holes to fix the sealing plug; unscrew the bolts and pull the arc-shaped fixing plate to take the vortex generator out of the shell for easy cleaning, avoid being contaminated by the medium or entangled by dirt, and improve the measurement accuracy. At the same time, the vortex generator is a replaceable movable part, and the width can be changed to adapt to the requirements of different data measurements.

[0006] Preferably, the vortex generator is configured as a twin generator; the unique twin generator can continue to generate stable Karman vortices even at ultra-high speeds, thus solving the problem that the greater the flow rate, the worse the vortex stability.

[0007] Preferably, a mounting frame is fixedly installed in the middle of the inner wall of the shell, a support rod is fixedly installed at one end of the bottom of the two mounting frames that is close to each other, an arc plate is fixedly installed at the other end of the support rod, a rotating ball is movably and rotatably installed in the middle of the arc plate, and nanogenerator sensitive elements are fixedly installed at the upper and lower ends of the rotating ball; the Karman vortex causes the nanogenerator sensitive element to resonate to detect the local pressure change caused by the vortex, output an electrical signal, thereby measuring the frequency of vortex generation and separation, and then obtaining the fluid flow rate.

[0008] Preferably, the supporting assembly includes a supporting sleeve, a telescopic support arm, a gear shaft and a turning handle. The supporting sleeve is fixedly mounted on the bottom of the shell, the telescopic support arm is slidably mounted on the bottom of the supporting sleeve, the gear shaft is rotatably mounted on the lower portion of the left side wall of the supporting sleeve, a toothed plate meshing with the gear shaft is provided on the left side wall of the telescopic support arm, and a turning handle is fixedly mounted on the front end of the gear shaft through the front end of the supporting sleeve; the turning handle drives the gear shaft to rotate, and by cooperating with the toothed plate, the extending length of the telescopic support arm in the supporting sleeve can be adjusted, so that the height position can be adjusted according to different application scenarios, so as to support the shell and improve stability.

[0009] Preferably, the connecting assembly includes two connecting convex rings, two connecting sleeves, two groups of connecting plates and studs, the two connecting convex rings are fixedly installed at the left and right ends of the shell, a sealing gasket is provided at the ends of the two connecting convex rings away from each other, and a slope is provided at the ends of the two connecting convex rings close to each other, the connecting sleeve is sleeved on the outside of the connecting flange and the connecting convex ring, the inside of the connecting sleeve is provided with a slope matching the slope of the connecting convex ring, an opening is provided on the upper part of the connecting sleeve, connecting plates are installed at both ends of the opening, clamping holes are provided on the connecting plates, and the studs pass through the clamping holes to connect the two connecting plates; when in use, the connecting convex rings at the left and right ends of the shell are aligned with the connecting flange, the connecting sleeve is sleeved on the connecting flange and the connecting convex ring, the studs are screwed to gradually reduce the upper opening of the connecting sleeve, so that the slope on the connecting sleeve cooperates with the connecting convex ring to gradually press and fix the connecting flange and the connecting convex ring, and the shell is installed on the pipeline without the need for multiple fixing bolts for connection, which is convenient for installation and improves installation efficiency.

[0010] Preferably, a fixing plate is fixedly connected to the bottom of the telescopic arm, and mounting holes are respectively provided at the four corners of the fixing plate; the fixing plate is fixed in the use position through the mounting holes, so that the shell is installed and fixed to ensure stability during use.

[0011] Compared with the prior art, the utility model has the following beneficial effects: when in use, the shell is installed on the pipeline through the cooperation of the connecting assembly and the connecting flange, and there is no need for multiple fixing bolts for connection, which is convenient for installation and improves the convenience during installation. The supporting assembly can support and install the shell to ensure stability during use. The vortex generator is installed inside the shell through the disassembly assembly. It is a replaceable movable part and the width can be changed to meet the requirements of different data measurements. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a front structural schematic diagram of the utility model;

[0014] Figure 3 It is a front cross-sectional structural schematic diagram of the utility model;

[0015] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model viewed from above;

[0016] Figure 5 It is a structural schematic diagram of the vortex generator of the utility model;

[0017] Markings in the attached drawings: 1. Shell; 2. Pipe; 3. Anti-interference sensor; 4. Display; 5. Connecting flange; 6. Vortex generator; 7. Positioning plate; 8. Sealing plug; 9. Mounting frame; 10. Support rod; 11. Arc plate; 12. Rotating ball; 13. Nanogenerator sensitive element; 14. Support sleeve; 15. Telescopic support arm; 16. Gear shaft; 17. Turning handle; 18. Connecting convex ring; 19. Connecting collar; 20. Connecting plate; 21. Stud; 22. Fixing plate. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0019] like Figures 1 to 5As shown, the middle part of the shell 1 is connected to the display 4 through the anti-interference sensor 3, the left top of the shell 1 is provided with an insertion hole, the bottom of the inner wall of the shell 1 is provided with a positioning groove corresponding to the insertion hole, the bottom of the vortex generator 6 is fixedly connected with a positioning plate 7, the positioning plate 7 matches the positioning groove, the top of the vortex generator 6 is fixedly connected with a sealing plug 8, the sealing plug 8 is set to a shape matching the insertion hole, the top of the sealing plug 8 is provided with an arc-shaped fixing plate matching the outer wall of the shell 1, the arc-shaped fixing plate and the outer wall of the shell 1 are provided with fixing holes, and a plurality of bolts are passed through the fixing holes to fix the sealing plug 8, the vortex generator 6 is set as a double generator, a mounting frame 9 is fixedly installed in the middle of the inner wall of the shell 1, a support rod 10 is fixedly installed at one end close to the bottom of the two mounting frames 9, an arc plate 11 is fixedly installed at the other end of the support rod 10, a rotating ball 12 is movably and rotatably installed in the middle of the arc plate 11, and a nanogenerator sensitive element 13 is fixedly installed at the upper and lower ends of the rotating ball 12, and a support sleeve 14 is fixedly installed at the shell 1 At the bottom, the telescopic arm 15 is slidably mounted on the bottom of the support sleeve 14. The bottom of the telescopic arm 15 is fixedly connected with a fixing plate 22. The four corners of the fixing plate 22 are respectively provided with mounting holes. A gear shaft 16 is rotatably mounted on the lower part of the left side wall of the support sleeve 14. A toothed plate meshing with the gear shaft 16 is provided on the left side wall of the telescopic arm 15. The front end of the gear shaft 16 passes through the front end of the support sleeve 14 and is fixedly mounted with a turning handle 17. A connecting flange 5 is provided on the pipe 2. Two connecting convex rings 18 are fixedly mounted on the pipe 2. At the left and right ends of the housing 1, a sealing gasket is provided at one end of the two connecting protruding rings 18 that are away from each other, and a slope is provided at one end of the two connecting protruding rings 18 that are close to each other. A connecting collar 19 is sleeved on the outside of the connecting flange 5 and the connecting protruding ring 18, and the inside of the connecting collar 19 is provided with a slope that matches the slope of the connecting protruding ring 18. An opening is provided at the top of the connecting collar 19, and connecting plates 20 are installed at both ends of the opening. Clamping holes are provided on the connecting plates 20, and studs 21 pass through the clamping holes to connect the two connecting plates 20;

[0020] The fixing plate 22 is fixed in the use position through the mounting hole, so that the housing 1 is installed and fixed to ensure stability during use. The turning handle 17 drives the gear shaft 16 to rotate. By cooperating with the toothed plate, the extension length of the telescopic support arm 15 in the support sleeve 14 can be adjusted, which is convenient for adjusting the height position according to different application scenarios, and is convenient for supporting the housing 1 to improve stability. The connecting convex rings 18 at the left and right ends of the housing 1 are aligned with the connecting flange 5, and the connecting collar 19 is mounted on the connecting flange 5 and the connecting collar 18. The stud 21 is screwed to gradually reduce the upper opening of the connecting collar 19, so that the slope on the connecting collar 19 cooperates with the connecting collar 18 to gradually press and fix the connecting flange 5 and the connecting collar 18, and the housing 1 is installed in the pipeline 2 On the top, there is no need for multiple fixing bolts for connection, which is convenient for installation and improves installation efficiency. The vortex generator 6 is set as a double generator. The unique double generator can continue to generate stable Karman vortex at ultra-high speed, which solves the problem that the greater the flow, the worse the vortex stability. Unscrew the bolts and pull the arc-shaped fixing plate to take the vortex generator 6 out of the shell 1, which is easy to clean and avoid being contaminated by the medium or entangled by dirt, thereby improving measurement accuracy. At the same time, the vortex generator 6 is a replaceable movable part, and the width can be changed to meet the requirements of different data measurements. The Karman vortex causes the nanogenerator sensitive element 13 to resonate to detect the local pressure change caused by the vortex, output an electrical signal, thereby measuring the frequency of vortex generation and separation, and then obtaining the fluid flow rate.

[0021] like Figures 1 to 5 As shown, the utility model is a vortex flowmeter with improved sensor resonance frequency. When working, the rotating handle 17 drives the gear shaft 16 to rotate, and the extension length of the telescopic support arm 15 in the support sleeve 14 can be adjusted by cooperating with the tooth plate. The connecting convex rings 18 at the left and right ends of the housing 1 are aligned with the connecting flange 5, and the fixing plate 22 is fixed in the use position through the mounting hole, so as to install and fix the housing 1, and the connecting collar 19 is sleeved on the connecting flange 5 and the connecting collar 18, and the stud 21 is screwed to gradually reduce the upper opening of the connecting collar 19, so that the connecting collar 19 The slope on the upper surface cooperates with the connecting convex ring 18 to gradually tighten and fix the connecting flange 5 and the connecting convex ring 18, and the shell 1 is installed on the pipeline 2. The vortex generator 6 is set as a double generator, which can continue to generate stable Karman vortexes at ultra-high speeds. The Karman vortex causes the nanogenerator sensitive element 13 to resonate to detect the local pressure changes caused by the vortex, output electrical signals, and thus measure the frequency of vortex generation and separation, and then obtain the fluid flow rate. Unscrew the bolts and pull the arc-shaped fixing plate to take the vortex generator 6 out of the shell 1 for easy cleaning to avoid being contaminated by the medium or entangled by dirt.

[0022] The display 4 and the nanogenerator sensitive element 13 of the vortex flowmeter with improved sensor resonance frequency of the utility model are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual without the need for creative work by technicians in this field.

[0023] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A vortex flowmeter with an improved sensor resonance frequency, characterized in that: The invention comprises a housing (1), an anti-interference sensor (3), a display (4), a vortex generator (6), a disassembly component, a connection component and a support component. A connection flange (5) is provided on the pipeline (2). The left and right ends of the housing (1) are connected to the pipeline (2) through the connection component and the connection flange (5). The middle part of the housing (1) is connected to the display (4) through the anti-interference sensor (3). The vortex generator (6) is installed inside the housing (1) through the disassembly component. The bottom of the housing (1) is installed with a support component.

2. A vortex flowmeter with an improved sensor resonance frequency as claimed in claim 1, characterized in that: The disassembly assembly comprises a positioning plate (7) and a sealing plug (8); an insertion hole is provided at the top left side of the shell (1); a positioning groove is provided at the bottom end of the inner wall of the shell (1) at a position corresponding to the insertion hole; the bottom of the vortex generator (6) is fixedly connected to the positioning plate (7); the positioning plate (7) matches the positioning groove; the top of the vortex generator (6) is fixedly connected to the sealing plug (8); the sealing plug (8) is configured to have a shape matching the insertion hole; an arc-shaped fixing plate matching the outer wall of the shell (1) is provided at the top of the sealing plug (8); fixing holes are provided on the arc-shaped fixing plate and the outer wall of the shell (1); a plurality of bolts pass through the fixing holes to fix the sealing plug (8).

3. A vortex flowmeter with improved sensor resonance frequency as claimed in claim 1, characterized in that: The vortex generator (6) is configured as a double generator.

4. A vortex flowmeter with an improved sensor resonance frequency as claimed in claim 1, characterized in that: A mounting frame (9) is fixedly mounted on the middle of the inner wall of the housing (1); a support rod (10) is fixedly mounted on one end of the bottoms of the two mounting frames (9) that are close to each other; an arc plate (11) is fixedly mounted on the other end of the support rod (10); a rotating ball (12) is movably and rotatably mounted on the middle of the arc plate (11); and nanogenerator sensitive elements (13) are fixedly mounted on the upper and lower ends of the rotating ball (12).

5. A vortex flowmeter with an improved sensor resonance frequency as claimed in claim 1, characterized in that: The support assembly comprises a support sleeve (14), a telescopic support arm (15), a gear shaft (16) and a rotating handle (17); the support sleeve (14) is fixedly mounted on the bottom of the housing (1); the telescopic support arm (15) is slidably mounted on the bottom of the support sleeve (14); the gear shaft (16) is rotatably mounted on the lower portion of the left side wall of the support sleeve (14); a toothed plate meshing with the gear shaft (16) is provided on the left side wall of the telescopic support arm (15); and the front end of the gear shaft (16) passes through the front end of the support sleeve (14) and is fixedly mounted with the rotating handle (17).

6. A vortex flowmeter with improved sensor resonance frequency as claimed in claim 1, characterized in that: The connection assembly comprises two connection protrusions (18), two connection sleeves (19), two groups of connection plates (20) and studs (21). The two connection protrusions (18) are fixedly mounted on the left and right ends of the housing (1). A sealing gasket is arranged at the ends of the two connection protrusions (18) that are away from each other. A slope is arranged at the ends of the two connection protrusions (18) that are close to each other. The connection sleeve (19) is sleeved on the outside of the connection flange (5) and the connection protrusions (18). The inside of the connection sleeve (19) is provided with a slope that matches the slope of the connection protrusions (18). An opening is arranged at the top of the connection sleeve (19). Connection plates (20) are mounted at both ends of the opening. Clamping holes are arranged on the connection plates (20). The studs (21) pass through the clamping holes to connect the two connection plates (20).

7. A vortex flowmeter with an improved sensor resonance frequency as claimed in claim 5, characterized in that: A fixing plate (22) is fixedly connected to the bottom of the telescopic support arm (15), and mounting holes are respectively provided at the four corners of the fixing plate (22).

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