Anti-vibration type spin vortex flowmeter
By using a fixing device with rubber rings and pressure sleeves in the vortex flowmeter, combined with piezoelectric sensors and vibration sensors, the problem of vibration interference between the vortex generator and the devortex generator is solved, enabling convenient maintenance and accurate measurement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KAIFENG INSTR
- Filing Date
- 2025-09-09
- Publication Date
- 2026-06-23
AI Technical Summary
The existing vortex flowmeters have vortex generators and devortex generators that are fixedly installed on the measuring tube, which are prone to scale buildup. Furthermore, the gap between them increases with the duration of use, leading to vibration interference and affecting measurement accuracy.
The fixing device consists of a combination of rubber rings, fixed connecting rings, pressure rings and pressure sleeves. The connection is tightened by the deformation of the rubber rings to reduce vibration transmission. Combined with piezoelectric sensors and vibration sensors, vibration interference is accurately measured and reduced.
It facilitates the maintenance of vortex generators and despinning bodies, reduces vibration interference, improves measurement accuracy and work efficiency, and has a simple structure and is easy to operate.
Smart Images
Figure CN224398727U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flow measurement, specifically to a shock-resistant vortex flow meter. Background Technology
[0002] The vortex flow meter is a relatively new technology that has seen widespread application in recent years. It calculates flow rate by measuring the pulse frequency of the precession effect of vortices within the flow meter. Key features of this flow meter include no moving parts, a wide linear measurement range, excellent corrosion resistance, and broad adaptability to various media, making it suitable for metering gases, liquids, and other media. The vortex generator is rigidly installed within the flow meter housing. Its function is to rotate the fluid flowing into the flow meter's internal cavity. The tangential component of the rotational velocity still causes the fluid to move forward along the internal axis. The combination of rotational and axial motion generates a continuous vortex flow, with the vortex core at the center, surrounded by an outer circulation. In the contraction section, the fluid velocity accelerates, the vortex core diameter rapidly decreases, and the vortex intensity increases. When the fluid flows through the diffuser section, the vortex velocity decreases, the circulation pressure rises, and the vortex core pressure is at its lowest, resulting in a backflow phenomenon under the influence of the pressure difference. Backflow causes the vortex flow to deviate from its forward direction, moving in a gyroscope-like motion. This motion can be decomposed into three parts: the rotation of the vortex around its own axis, the rotation of the vortex axis around the axis of the main flow, and the forward motion of the vortex along the direction of the main flow. The vortex precession effect occurs in the expansion section, close to the inner wall of the flowmeter housing. The precession frequency is linearly related to the flow velocity. The vortex precession frequency can qualitatively reflect the magnitude of the flow velocity and volumetric flow rate. After calibration, the flowmeter can quantitatively measure the volumetric flow rate of the fluid.
[0003] When the measured medium is water, especially circulating water, the circulating water enters the vortex flowmeter and first comes into contact with the vortex generator. The circulating water then rotates under the action of the vortex generator and is finally rectified by the desiccant before being transported to the downstream pipeline. During this process, because the circulating water does work on the vortex generator and desiccant, scale easily adheres to these components. If the vortex generator and desiccant are fixedly installed on the measuring tube of the vortex flowmeter, after scale buildup, the measuring tube of the vortex flowmeter needs to cut the vortex generator and desiccant for deep cleaning at certain times. However, fixing the vortex generator and desiccant to the measuring tube of the vortex flowmeter also has design advantages: there is no relative vibration between the measuring tube and the vortex generator, or between the measuring tube and the desiccant, which reduces interference during the measurement of the vortex precession frequency. Of course, existing technologies also include designs where the vortex generator and the desiccant are mounted to the measuring tube of the vortex flowmeter using fasteners. The advantage of this design is that it allows for easy disassembly and cleaning of the vortex generator and desiccant after scale buildup. However, during operation, circulating water continuously passes over the vortex generator and desiccant. Over time, the gaps between the vortex generator and the measuring tube, as well as between the desiccant and the measuring tube, increase. This increased gap creates a vibration source, introducing additional interference during vortex precession frequency measurement. Therefore, existing technologies have room for improvement, aiming to facilitate the removal of the vortex generator and desiccant from the measuring tube and reduce the vibration transmitted from them to the measuring tube, thereby reducing additional interference during vortex precession frequency measurement. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this utility model provides an anti-vibration vortex flowmeter that facilitates the maintenance of the vortex generator and deswirl body and reduces the vibration transmitted from the vortex generator and deswirl body to the measuring tube, thereby overcoming the deficiencies in existing technologies.
[0005] The technical solution adopted by this utility model is as follows: a shock-resistant vortex flowmeter, including a measuring tube, a first connecting flange provided at the inlet end of the measuring tube, a vortex generator provided inside the inlet end of the measuring tube, a second connecting flange provided at the outlet end of the measuring tube, and an anti-vortex body provided at the outlet end of the measuring tube. A first mounting groove is provided on the first connecting flange, and a second mounting groove is provided on the second connecting flange. Fixing devices are respectively provided for the first mounting groove and the vortex generator, as well as the second mounting groove and the anti-vortex body. The fixing device includes a first rubber ring, a fixed connecting ring, a second rubber ring, a pressure ring, and a pressure sleeve arranged sequentially in the first or second mounting groove along the direction from near to far from the measuring tube. The vortex generator is connected to the adjacent fixed connecting ring, and the anti-vortex body is connected to the adjacent fixed connecting ring.
[0006] Preferably, the measuring tube has a first through hole, an installation tube is provided on the outside of the first through hole, a piezoelectric sensor is provided on the installation tube and the first through hole, a first sealing gasket is provided between the piezoelectric sensor and the measuring tube, and a plug is provided on the installation tube outside the piezoelectric sensor.
[0007] Preferably, the piezoelectric sensor includes a housing, a first wing plate is disposed on the outer side of the housing, a flow sensor is disposed inside the housing below the first wing plate, a sheath is disposed on the outer side of the housing above the first wing plate, a vibration sensor is disposed between the sheath and the housing, and a sealant layer is disposed in the cavity between the sheath and the housing outside the vibration sensor and the inner cavity of the housing outside the flow sensor.
[0008] Preferably, the vibration sensor includes a first crystal, a first electrode disposed inside the first crystal, and a second crystal disposed inside the first electrode. The first crystal, the first electrode, and the second crystal are all tubular structures. The flow sensor includes a third crystal and second electrodes disposed on both sides of the third crystal.
[0009] Preferably, the measuring tube, from its inlet to its outlet, comprises a tapering section, a first straight section, a expanding section, and a second straight section. A second through hole is provided on the measuring tube above the first straight section, and a pressure sensor is installed in the second through hole. A third through hole is provided on the measuring tube above the second straight section, and a temperature sensor is installed in the third through hole. Second gaskets are respectively provided between the temperature sensor above the third through hole and the measuring tube, and between the pressure sensor above the second through hole and the measuring tube. Pressure rings are respectively provided on the top of the temperature sensor and the measuring tube, and on the top of the pressure sensor and the measuring tube.
[0010] Preferably, the end of the pressure sleeve away from the pressure ring has an even number of slots evenly distributed in a star shape around the outer side of the central axis of the pressure sleeve.
[0011] The beneficial effects of this utility model are as follows: First, the fixing device facilitates the maintenance of the vortex generator and the despinning body. The fixing connecting ring is installed between the first rubber ring and the second rubber ring, which facilitates the blocking of vibration waves transmitted by the vortex generator or the despinning body, thereby reducing the vibration transmitted by the vortex generator or the despinning body to the vortex generator or the despinning body. Furthermore, during the installation of the pressure sleeve, the pressure sleeve gradually forces the pressure ring to move towards the measuring tube, thereby deforming the first rubber ring and the second rubber ring to clamp the fixing connecting ring. During this process, the pressure sleeve and the pressure ring are always in a state of active friction, which reduces the resistance experienced by the pressure sleeve during installation compared to the pressure sleeve directly contacting the second rubber ring made of rubber.
[0012] Secondly, the cavity between the outer sheath and the housing of the vibration sensor and the inner cavity of the outer housing of the flow sensor are respectively provided with a sealant layer. Installing the sealant layer facilitates the protection of the vibration sensor and the flow sensor.
[0013] This utility model has a simple structure, is easy to operate, and has a clever design, which greatly improves work efficiency and has good social and economic benefits. It is a product that is easy to promote and use. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model.
[0015] Figure 2 for Figure 1 A magnified view of detail A.
[0016] Figure 3 This is a schematic diagram of the structure of the piezoelectric sensor of this utility model.
[0017] Figure 4 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0018] like Figures 1 to 4As shown, an anti-vibration vortex flowmeter includes a measuring tube 1. A first connecting flange 2 is provided at the inlet end of the measuring tube 1, a vortex generator 3 is provided inside the inlet end of the measuring tube 1, a second connecting flange 4 is provided at the outlet end of the measuring tube 1, and an anti-vortex body 5 is provided at the outlet end of the measuring tube 1. A first mounting groove 6 is provided on the first connecting flange 2, and a second mounting groove 7 is provided on the second connecting flange 4. Fixing devices are provided for the first mounting groove 6 and the vortex generator 3, as well as the second mounting groove 7 and the anti-vortex body 5. The fixing devices include a first rubber ring 8, a fixed connecting ring 9, a second rubber ring 10, a pressure ring 11, and a pressure sleeve 12 arranged sequentially in the first mounting groove 6 or the second mounting groove 7 along the direction from near to far from the measuring tube 1. The vortex generator 3 is connected to the adjacent fixed connecting ring 9, and the anti-vortex body 5 is connected to the adjacent fixed connecting ring 9. Both the first mounting groove 6 and the second mounting groove 7 are provided with internal threads, and the outer surface of the pressure sleeve 12 is provided with external threads. The first mounting groove 6 and the adjacent pressure sleeve 12 are threadedly connected, and the second mounting groove 7 and the adjacent pressure sleeve 12 are threadedly connected. The measuring tube 1 has a first through hole 13, and a mounting tube 14 is provided on the outer side of the first through hole 13. A piezoelectric sensor is provided on the mounting tube 14 and the first through hole 13. A first sealing gasket 15 is provided between the piezoelectric sensor and the measuring tube 1. The first sealing gasket 15 is a ring structure made of polytetrafluoroethylene. A plug 16 is provided on the mounting tube 14 on the outer side of the piezoelectric sensor, and the plug 16 is threadedly connected to the mounting tube 14. The first rubber ring 8 and the second rubber ring 10 are both ring structures made of rubber; the pressure ring 11 is a ring structure made of homogeneous steel.
[0019] The piezoelectric sensor includes a housing 17, with a first wing plate 18 disposed on the outer side of the housing 17. The first wing plate 18 is attached to the mounting tube 14. A flow sensor is disposed inside the housing 17 below the first wing plate 18. A sheath 19 is disposed on the outer side of the housing 17 above the first wing plate 18. A vibration sensor is disposed between the sheath 19 and the housing 17. A sealant layer 20 is disposed in the cavity between the sheath 19 and the housing 17 outside the vibration sensor, as well as in the inner cavity of the housing 17 outside the flow sensor. The sealant layer 20 uses BAJ-9082 potting compound.
[0020] Furthermore, the vibration sensor includes a first crystal 21, a first electrode 22 disposed inside the first crystal 21, and a second crystal 23 disposed inside the first electrode 22. The first crystal 21, the first electrode 22, and the second crystal 23 are all tubular structures. Both the first crystal 21 and the second crystal 23 are connected to a first wing plate 18, which is connected to the housing 17. The measuring tube 1 receives vibration waves transmitted by the system and transmits the vibration waves to the housing 17. The measuring tube 1 simultaneously transmits the vibration waves to the flow sensor and the first wing plate 18. The first wing plate 18 transmits the vibration waves to the first crystal 21 and the second crystal 23. The first crystal 21 and the second crystal 23 deform to generate a first charge, which is transmitted to the first electrode 22. The first electrode 22 transmits the first charge to the first charge processing device, which generates a first electrical signal based on the first charge, thereby obtaining a vibration signal. The flow sensor includes a third crystal 24 and second electrodes 25 disposed on both sides of the third crystal 24. The third crystal 24 is connected to the housing 17. When the fluid medium passes through the measuring tube 1, it forces the housing 17 to deform. Combined with the vibration wave transmitted from the measuring tube 1 to the flow sensor, the housing 17 causes the third crystal 24 to deform, thereby generating a second charge. Two second electrodes 25 are used, forming the positive and negative poles of the third crystal 24. The two second electrodes 25 respectively guide the second charge to a second charge processing device. The second charge processing device converts the charges transmitted by the two second electrodes 25 into a total signal. The flow signal is obtained by subtracting the vibration signal from the total signal.
[0021] The measuring tube 1, from its inlet to its outlet, sequentially comprises a tapered section, a first straight section, a expanding section, and a second straight section. A first through-hole 13 is located at the junction of the first straight section and the expanding section. A second through-hole 26 is provided on the measuring tube 1 above the first straight section, and a pressure sensor 27 is installed on the second through-hole 26. A third through-hole 28 is provided on the measuring tube 1 above the second straight section, and a temperature sensor 29 is installed on the third through-hole 28. Second gaskets 30 are respectively provided between the temperature sensor 29 above the third through-hole 28 and the measuring tube 1, and between the pressure sensor 27 above the second through-hole 26 and the measuring tube 1. The second gaskets 30 are ring-shaped structures made of polytetrafluoroethylene. Pressure rings 31 are respectively provided on the top of the temperature sensor 29 and the measuring tube 1, and on the top of the pressure sensor 27 and the measuring tube 1. Installing the pressure rings 31 facilitates fixing the pressure sensor 27 or the temperature sensor 29 in the mounting position of the measuring tube 1.
[0022] The pressure sleeve 12, located away from the pressure ring 11, has an even number of evenly distributed star-shaped slots 32 around the outer side of its central axis. This facilitates the insertion of a rectangular plate into two symmetrically distributed slots 32 on the pressure sleeve 12, thereby rotating the pressure sleeve 12 and installing it into a preset position.
[0023] The instructions for using this product are as follows: Figures 1 to 4 As shown, the circulating water enters the inlet end of the measuring pipe 1 and generates a violent vortex flow within the vortex generator 3. Guided by the converging pipe section, the flow velocity of the circulating water gradually increases. When the circulating water enters the first straight pipe section, the flow velocity reaches its maximum value. When the circulating water enters the expanding pipe section, the vortex within the circulating water is subjected to the backflow effect of the pipe walls of the second straight pipe section and the expanding pipe section, forming a secondary selection, thereby generating a gyroscopic vortex precession phenomenon. The flow sensor detects the frequency of this vortex precession and emits a first pulse signal. Simultaneously, vibrations transmitted from the upstream and downstream pipes to the measuring pipe 1 are transmitted from the measuring pipe 1 to the mounting pipe 14. The mounting pipe 14 transmits the vibrations to the housing 17 through the first wing plate 18, and finally, the vibration sensor collects and emits a second pulse signal. The pressure sensor 27 collects and emits a pressure signal. The temperature sensor 29 collects and emits a temperature signal. The staff obtains the final flow parameters based on the first pulse signal, the second pulse signal, the pressure signal, the temperature signal, and the inherent parameters of the measuring tube 1. Finally, the circulating water is rectified by the racemate 5 and then transported to the downstream pipeline.
[0024] In this embodiment, the fixing device facilitates the maintenance of the vortex generator and the despinning body. The fixing connecting ring 9 is installed between the first rubber ring 8 and the second rubber ring 10, which helps to block the vibration waves transmitted by the vortex generator 3 or the despinning body 5, thereby reducing the vibration transmitted by the vortex generator 3 or the despinning body 5 to the vortex generator 3 or the despinning body 5. Furthermore, during the installation of the pressure sleeve 12, the pressure sleeve 12 gradually forces the pressure ring 11 to move towards the measuring tube 1, thereby deforming the first rubber ring 8 and the second rubber ring 10 to clamp the fixing connecting ring 9. During this process, the pressure sleeve 12 and the pressure ring 11 are always in a state of active friction, which reduces the resistance experienced by the pressure sleeve 12 during installation compared to the pressure sleeve 12 directly contacting the second rubber ring 10 made of rubber.
[0025] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.
Claims
1. A seismic-resistant vortex flowmeter, comprising a measuring tube (1), wherein a first connecting flange (2) is provided at the inlet end of the measuring tube (1), a vortex generator (3) is provided inside the inlet end of the measuring tube (1), a second connecting flange (4) is provided at the outlet end of the measuring tube (1), and an anti-vortex body (5) is provided at the outlet end of the measuring tube (1), characterized in that: The first connecting flange (2) is provided with a first mounting groove (6), and the second connecting flange (4) is provided with a second mounting groove (7). The first mounting groove (6) and the vortex generator (3), as well as the second mounting groove (7) and the deswirl body (5), are each provided with a fixing device. The fixing device includes a first rubber ring (8), a fixing connecting ring (9), a second rubber ring (10), a pressure ring (11), and a pressure sleeve (12) arranged sequentially in the first mounting groove (6) or the second mounting groove (7) along the direction from near the measuring tube (1) to away from the measuring tube (1). The vortex generator (3) is connected to the adjacent fixing connecting ring (9), and the deswirl body (5) is connected to the adjacent fixing connecting ring (9).
2. The earthquake-resistant vortex flowmeter according to claim 1, characterized in that: The measuring tube (1) is provided with a first through hole (13), and an installation tube (14) is provided on the outside of the first through hole (13). A piezoelectric sensor is provided on the installation tube (14) and the first through hole (13). A first sealing gasket (15) is provided between the piezoelectric sensor and the measuring tube (1). A plug (16) is provided on the installation tube (14) on the outside of the piezoelectric sensor.
3. The earthquake-resistant vortex flowmeter according to claim 2, characterized in that: The piezoelectric sensor includes a housing (17), a first wing plate (18) is provided on the outside of the housing (17), a flow sensor is provided inside the housing (17) below the first wing plate (18), a sheath (19) is provided on the outside of the housing (17) above the first wing plate (18), a vibration sensor is provided between the sheath (19) and the housing (17), and a sealant layer (20) is provided in the cavity between the sheath (19) and the housing (17) outside the vibration sensor and in the inner cavity of the housing (17) outside the flow sensor.
4. The earthquake-resistant vortex flowmeter according to claim 3, characterized in that: The vibration sensor includes a first crystal (21), a first electrode (22) disposed inside the first crystal (21), and a second crystal (23) disposed inside the first electrode (22). The first crystal (21), the first electrode (22), and the second crystal (23) are all tubular structures. The flow sensor includes a third crystal (24) and second electrodes (25) disposed on both sides of the third crystal (24).
5. The earthquake-resistant vortex flowmeter according to claim 2, characterized in that: The measuring tube (1) includes a tapered section, a first straight section, a tapered section and a second straight section in sequence from the inlet end to the outlet end. A second through hole (26) is provided on the measuring tube (1) above the first straight section. A pressure sensor (27) is provided on the second through hole (26). A third through hole (28) is provided on the measuring tube (1) above the second straight section. A temperature sensor (29) is provided on the third through hole (28). A second gasket (30) is provided between the temperature sensor (29) above the third through hole (28) and the measuring tube (1), and between the pressure sensor (27) above the second through hole (26) and the measuring tube (1). A pressure ring (31) is provided on the top of the temperature sensor (29) and the measuring tube (1), and on the top of the pressure sensor (27) and the measuring tube (1).
6. The earthquake-resistant vortex flowmeter according to claim 1, characterized in that: The pressure sleeve (12) has an even number of slots (32) evenly distributed in a star shape on the outer side of the central axis of the pressure sleeve (12) away from the pressure ring (11).