Vortex shedding flowmeter sensor

Abstract

The utility model provides a vortex shedding flowmeter sensor, which belongs to the technical field of pipeline fluid flow detection and comprises a measuring pipe, a corrugated pipe, an outer vibration reduction structure and an inner vibration reduction structure. An annular groove is formed in the inner wall of the measuring tube; the corrugated pipe is connected to the end part of the measuring pipe and is used for being connected with a measured pipeline; the outer vibration reduction structure is arranged on the measuring pipe in a sleeving mode and connected with the corrugated pipe. The inner vibration reduction structure is embedded in the annular groove; the inner vibration reduction structure is provided with a mounting groove, and a vortex street generating body is embedded in the mounting groove. According to the utility model, the corrugated pipe is used for connecting the measuring pipe and the measured pipeline, so that not only can the sealing connection between the measuring pipe and the measured pipeline be ensured, but also the primary anti-vibration effect on the measuring pipe can be realized; the outer vibration reduction structure is arranged on the measuring pipe in a sleeving manner, is connected with the corrugated pipe, and is used for avoiding self vibration of the measuring pipe and playing a role in secondary vibration prevention; the inner vibration reduction structure is arranged on the inner wall of the measuring tube and used for assembling the vortex street generating body so as to prevent the vortex street generating body from being impacted by the fluid medium to vibrate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pipeline fluid flow detection technical field, more specifically, relate to a vortex shedding flowmeter sensor. BACKGROUND

[0002] The vortex shedding flowmeter is researched and produced according to Karman vortex principle, and is mainly used for the flow measurement of industrial pipeline medium fluid, such as gas, liquid, steam and various media.The vortex shedding flowmeter has the characteristics of small pressure loss, wide range and high precision, and is almost not affected by fluid density, pressure, temperature, viscosity and other parameters when measuring the volume flow.

[0003] The vortex shedding flowmeter sensor generally includes a measuring pipe, a vortex generator and a vortex detection unit, and the vortex detection unit has a vortex sensor.The measuring pipe is connected with the measured pipeline, and the vortex sensor and the vortex generator are located in the interior of the measuring pipe.Due to the vibration of the measured pipeline or the measuring pipe, the vortex generator also vibrates when the medium fluid impacts the vortex generator, and the vortex sensor is affected by double vibrations, resulting in errors in the measurement results and affecting the accuracy of the detection data. UTILITY MODEL CONTENT

[0004] The utility model discloses a vortex shedding flowmeter sensor, and aims at solving the technical problem of inaccurate measurement results caused by pipeline vibration and vortex generator vibration in the prior art.

[0005] To achieve the above object, the utility model adopts the technical scheme of providing a vortex shedding flowmeter sensor, which comprises:

[0006] A measuring pipe is connected with a vortex detection unit, and an annular groove is arranged on the inner wall of the measuring pipe.

[0007] A corrugated pipe is connected to the end of the measuring pipe and used for connecting with the measured pipeline.

[0008] An outer damping structure is sleeved on the measuring pipe and connected with the corrugated pipe.

[0009] An inner damping structure is embedded in the annular groove, and the inner damping structure is provided with a mounting groove in which a vortex generator is embedded.

[0010] In a possible implementation manner, the outer damping structure comprises:

[0011] A first sleeve is sleeved on the outer circumferential surface of the measuring pipe.

[0012] A second sleeve is sleeved on the periphery of the first sleeve, and a damping space exists between the first sleeve and the second sleeve, and the second sleeve is connected with the corrugated pipe.

[0013] A plurality of damping springs are arranged in the damping space at equal intervals in the circumferential direction.

[0014] In some embodiments, the first sleeve comprises two first clamps, and the two first clamps are arranged on the outer periphery of the measuring tube; and the second sleeve comprises two second clamps.

[0015] In some embodiments, an installation space is arranged between the abutting surfaces of the two first clamps, and a damping buffer structure is connected in the installation space.

[0016] In some embodiments, the damping buffer structure comprises:

[0017] a sleeve is arranged on the abutting surface of one of the first clamps;

[0018] a sleeve rod is arranged on the abutting surface of the other first clamp, and one end of the sleeve rod extends into the sleeve; and

[0019] a damping strip is embedded on the side wall of the sleeve rod, and is used for forming a damping fit with the inner wall of the sleeve.

[0020] In some embodiments, a gas hole is arranged on the side wall of the sleeve.

[0021] In some embodiments, rubber pads are arranged on the inner sides of the two first clamps.

[0022] In some embodiments, the abutting ends of the second clamps are provided with outwardly extending connecting portions, the connecting portions of the two second clamps correspond in the radial direction and are connected by bolts.

[0023] In some embodiments, the end of the bellows is connected with a flange, an installation seat is arranged on the outer periphery of the second sleeve, and the flange and the installation seat are connected by a screw rod.

[0024] In a possible implementation, the inner damping structure is a rubber ring, the rubber ring has an adjusting cavity, and the rubber ring is further connected with an air inlet pipe, and one end of the air inlet pipe extends into the adjusting cavity.

[0025] The vortex flowmeter sensor has the advantages that the vortex flowmeter sensor is connected with the measuring tube and the measured pipeline by the bellows, can ensure the sealing connection between the measuring tube and the measured pipeline, and can also play a primary anti-vibration role on the measuring tube; the outer damping structure is sleeved on the measuring tube and connected with the bellows, can avoid the vibration of the measuring tube itself, and plays a secondary anti-vibration role; and the inner damping structure is arranged on the inner wall of the measuring tube and is used for assembling the vortex generator, so as to avoid the vibration of the vortex generator caused by the impact of the fluid medium.

[0026] Compared with the prior art, the vortex flowmeter sensor can simultaneously avoid the vibration of the measuring pipe and the vortex street generator, further avoid the vibration of the vortex detection unit, reduce the measurement error, and improve the accuracy of the detection data. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 The structural schematic diagram of the vortex flowmeter sensor provided by the embodiment of the present application is shown in the figure.

[0029] Figure 2 The sectional structural schematic diagram of the vortex flowmeter sensor provided by the embodiment of the present application is shown in the figure.

[0030] Figure 3 The structural schematic diagram of the outer damping structure of the vortex flowmeter sensor provided by the embodiment of the present application is shown in the figure. Figure 2

[0031] Figure 4 The structural schematic diagram of the outer damping structure of the vortex flowmeter sensor provided by the embodiment of the present application is shown in the figure.

[0032] In the figure:

[0033] 1, measuring pipe; 11, ring groove;

[0034] 2, vortex detection unit;

[0035] 3, corrugated pipe; 31, flange;

[0036] 4, outer damping structure; 41, first sleeve; 411, first hoop; 412, rubber pad; 42, second sleeve; 421, second hoop; 422, connecting part; 423, bolt; 43, damping spring; 44, damping buffer structure; 441, sleeve; 442, sleeve rod; 443, damping strip; 444, air hole; 45, mounting seat; 46, screw rod;

[0037] 5, inner damping structure; 51, mounting groove; 52, adjusting cavity; 53, air inlet pipe;

[0038] 6, vortex generator. DETAILED DESCRIPTION

[0039] ​In order to make the technical problems, technical schemes and beneficial effects of the utility model clearer, the utility model will be explained in further detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and not to limit the utility model.

[0040] Please refer to Figures 1 to 3 The vortex flowmeter sensor provided by the utility model will be described. The vortex flowmeter sensor comprises a measuring pipe 1, a bellows 3, an outer damping structure 4 and an inner damping structure 5. The measuring pipe 1 is connected with a vortex detection unit 2; an annular groove 11 is arranged on the inner wall of the measuring pipe 1; the bellows 3 is connected to the end of the measuring pipe 1 and is used to be connected with a measured pipeline; the outer damping structure 4 is sleeved on the measuring pipe 1 and is connected with the bellows 3; the inner damping structure 5 is embedded in the annular groove 11; the inner damping structure 5 is provided with a mounting groove 51, and a vortex generator 6 is embedded in the mounting groove 51.

[0041] The vortex detection unit 2 is arranged at the middle part of the measuring pipe 1, and the vortex detection unit 2 can adopt a common structure in the prior art, for example, the vortex detection unit 2 comprises a detection rod, a detection probe connected to the lower end of the detection rod and a transducer connected to the upper end of the detection rod. The detection probe and the vortex generator 6 are both located inside the measuring pipe 1, and the detection probe is located downstream of the vortex generator 6.

[0042] When measuring the fluid flow, when the fluid medium flows in the measuring pipe 1, after flowing through the vortex generator 6, alternating vortices are generated on both sides of the vortex generator 6, and then the frequency of vortex generation is detected through the detection probe. The detection probe transmits the detection signal to the transducer, the transducer calculates and processes the detection signal, obtains the flow data of the medium and displays the flow data through the display screen connected with the transducer. The specific form of the vortex detection unit 2 is not limited in the embodiment, as long as the above detection process can be realized.

[0043] Since the measuring pipe 1 needs to be connected to the measured pipeline, the two ends of the measuring pipe 1 are respectively connected with the bellows 3, preferably, the measuring pipe 1 and the bellows 3 are connected through flanges 31. The other end of the bellows 3 is connected with the measured pipeline, preferably, the two are also connected through the flanges 31.

[0044] Since the bellows 3 has the elastic deformation ability, the bellows 3 can absorb the vibration transmitted by the measured pipeline to the measuring pipe 1, thereby playing a role in primary anti-vibration; in addition, the two ends of the bellows 3 are respectively connected with the measuring pipe 1 and the measured pipeline through the flanges 31, which can also ensure the air tightness of the connection.

[0045] The external vibration damping structure 4 is fitted onto the measuring tube 1 and connected to the bellows 3. Damping particles or damping springs 43 can be installed inside the external vibration damping structure 4, as long as they can absorb the vibration transmitted from the measured pipeline to the measuring tube 1 and the vibration of the measuring tube 1 itself. The external vibration damping structure 4 serves as a secondary vibration damping mechanism for the measuring tube 1.

[0046] The inner vibration damping structure 5 is a ring-shaped structure, with its outer circumference fixedly installed within the annular groove 11 and its inner circumference having an installation groove 51. The inner vibration damping structure 5 needs to possess elastic deformation capability; on the one hand, it can tightly enclose the vortex generator 6, and on the other hand, it can absorb vibrations generated by the impact of the fluid medium. The inner vibration damping structure 5 serves to prevent vibration from the vortex generator 6.

[0047] The vortex flowmeter sensor provided by this utility model has a bellows 3 used to connect the measuring tube 1 and the measured pipeline, which can not only ensure the sealed connection between the measuring tube 1 and the measured pipeline, but also play a primary role in vibration damping of the measuring tube 1; the external vibration damping structure 4 is sleeved on the measuring tube 1 and connected to the bellows 3, which is used to prevent the measuring tube 1 from vibrating itself, playing a secondary role in vibration damping; the internal vibration damping structure 5 is set on the inner wall of the measuring tube 1, which is used to assemble the vortex generator 6, so as to prevent the vortex generator 6 from vibrating due to the impact of the fluid medium.

[0048] Compared with the prior art, the vortex flowmeter sensor provided by this utility model can simultaneously avoid the vibration of the measuring tube 1 and the vortex street, thereby avoiding the vibration of the vortex detection unit 2, reducing measurement error and improving the accuracy of detection data.

[0049] In some embodiments, the external vibration damping structure 4 described above can be as follows: Figure 1 , Figure 2 and Figure 4 The structure shown is described in the following document. Figure 1 , Figure 2 and Figure 4 The external vibration damping structure 4 includes a first sleeve 41, a second sleeve 42, and multiple damping springs 43. The first sleeve 41 is sleeved on the outer circumferential surface of the measuring tube 1; the second sleeve 42 is sleeved around the first sleeve 41, and there is a damping space between the second sleeve 42 and the first sleeve 41; the second sleeve 42 is connected to the bellows 3; and multiple damping springs 43 are evenly spaced along the circumference in the damping space.

[0050] The first sleeve 41 is directly sleeved on the outer circumferential surface of the measuring tube 1 and abuts against the measuring tube 1 radially; the second sleeve 42 is located radially outside the first sleeve 41; one end of each damping spring 43 is connected to the outer circumferential surface of the first sleeve 41 and the other end is connected to the inner circumferential surface of the second sleeve 42. That is to say, the damping spring 43 is arranged radially along the measuring tube 1 to absorb the lateral vibration of the measuring tube 1.

[0051] Specifically, if the measured pipeline has lateral vibration, the corrugated pipe 3 can absorb part of the lateral vibration, reducing the amount of vibration transmitted to the measuring pipe 1 by the measured pipeline; the remaining part of the vibration is transmitted to the second sleeve 42 through the corrugated pipe 3, and the plurality of damping springs 43 absorb the vibration of the second sleeve 42, thereby avoiding the lateral vibration of the measuring pipe 1.

[0052] If the measuring pipe 1 itself has lateral vibration (such as the fluid medium flowing in the measuring pipe 1 impacting the pipe wall of the measuring pipe 1, generating vibration, which can cause the connection between the vortex detection unit 2 and the measuring pipe 1 to loosen, causing the vortex detection unit 2 to vibrate), it can also be absorbed by the damping spring 43, reducing the vibration amplitude of the measuring pipe 1.

[0053] In some embodiments, the first sleeve 41 and the second sleeve 42 described above can adopt the structure as shown in Figure 4 , referring to Figure 4 , the first sleeve 41 includes two first clamps 411, and the two first clamps 411 are clamped on the periphery of the measuring pipe 1; the second sleeve 42 includes two second clamps 421.

[0054] The first sleeve 41 includes two abutting first clamps 411, thereby facilitating the installation of the first sleeve 41 on the measuring pipe 1. And without changing the structure of the measuring pipe 1, therefore, the external damping structure 4 can be applied to any measuring pipe 1 in the prior art, as long as the size of the first clamp 411 is designed according to the size of the measuring pipe 1.

[0055] Preferably, the inner side surface of the two first clamps 411 is paved with a rubber pad 412. The rubber pad 412 is in radial abutment with the outer peripheral wall of the measuring pipe 1, that is, the rubber pad 412 is clamped between the first clamp 411 and the measuring pipe 1, which can protect the outer peripheral surface of the measuring pipe 1 and avoid direct hard friction between the first clamp 411 and the measuring pipe 1.

[0056] The second sleeve 42 includes two abutting second clamps 421, which facilitates the installation of the damping spring 43 in the damping space and facilitates the surrounding of the second sleeve 42 on the periphery of the first sleeve 41.

[0057] Preferably, the abutting end of the second clamp 421 is provided with a connection portion 422 extending radially outward, and the connection portions 422 of the two second clamps 421 are radially corresponding and connected by a bolt 423.

[0058] In some embodiments, the first sleeve 41 described above can also adopt the structure as shown in Figure 4 , referring to Figure 4 , there is an installation space between the abutting surfaces of the two first clamps 411, and a damping buffer structure 44 is connected in the installation space.

[0059] The damping buffer structure 44 can buffer the vibration between the two first clamps 411, further reduce the vibration amplitude of the measuring pipe 1, and improve the stability of the vortex street detection unit 2.

[0060] Specifically, the damping buffer structure 44 includes a sleeve 441, a sleeve rod 442, and a damping strip 443; the sleeve 441 is arranged on the abutting surface of one of the first clamps 411; the sleeve rod 442 is arranged on the abutting surface of the other first clamp 411 and extends into the sleeve 441; and the damping strip 443 is embedded on the side wall of the sleeve rod 442 and used to form a damping fit with the inner wall of the sleeve 441.

[0061] The sleeve rod 442 and the sleeve 441 can move relative to each other. Specifically, when the measuring pipe 1 undergoes lateral vibration, the sleeve rod 442 and the sleeve 441 move relative to each other and rub against the damping strip 443, so that the damping strip 443 and the inner wall of the sleeve 441 form a damping fit, buffer the lateral vibration, and reduce the vibration amplitude of the measuring pipe 1.

[0062] In addition, the side wall of the sleeve 441 is provided with an air hole 444. The air hole 444 can flow in or out of the gas in the sleeve 441 when the sleeve 441 and the sleeve rod 442 move relative to each other, thereby buffering the vibration.

[0063] In some embodiments, the corrugated pipe 3 and the outer damping structure 4 can adopt the structure as shown in Figure 1 , referring to Figure 1 , the end of the corrugated pipe 3 is connected with a flange 31, the outer circumferential surface of the second sleeve 42 is provided with a mounting seat 45, and the flange 31 and the mounting seat 45 are connected through a screw rod 46.

[0064] It should be noted that the above-mentioned flange 31 is the outer end flange 31 of the corrugated pipe 3, that is, the flange 31 connected with the measured pipeline. The flange 31 is provided with mounting holes for connecting with the flange of the measured pipeline and mounting holes for connecting with the screw rod 46.

[0065] The corrugated pipe 3 and the measured pipeline are connected through the flange 31, which can ensure the air tightness of the connection.

[0066] The mounting seat 45 is connected with the flange 31 through the screw rod 46, and the flange 31 is connected with the measured pipeline, which is equivalent to that the mounting seat 45 is directly and rigidly connected with the measured pipeline. If the measured pipeline undergoes vibration, the screw rod 46 and the mounting seat 45 play a role in transmitting the vibration; if the measuring pipe 1 undergoes vibration, the screw rod 46 and the mounting seat 45 play a role in fixing the second sleeve 42, so as to ensure that the damping spring 43 can absorb the vibration.

[0067] In some embodiments, the above-mentioned inner damping structure 5 can adopt the structure as shown in Figure 2 and Figure 3 , referring to Figure 2and Figure 3 The inner damping structure 5 is a rubber ring, and the rubber ring has an adjusting cavity 52; and the rubber ring is further connected with an air inlet pipe 53, and one end of the air inlet pipe 53 extends into the adjusting cavity 52.

[0068] The rubber ring has elasticity, and can absorb and buffer the impact force from the medium fluid to the vortex shedding body 6 by using its own characteristics, so as to achieve the purpose of preventing vibration and ensure the accuracy of the detection data.

[0069] The rubber ring is further connected with the air inlet pipe 53, and a switch valve can be arranged on the air inlet pipe 53. When the switch valve is opened, air is introduced into the adjusting cavity 52 through the air inlet pipe 53, and as the pressure in the adjusting cavity 52 increases, the rubber ring gradually expands outward, so that the vortex shedding body 6 is better pressed and fixed in the mounting groove 51, and the fixation of the vortex shedding body 6 is ensured to be stable.

[0070] In addition, by adjusting the air inlet amount, the damping level of the rubber ring can be adjusted according to the different flow rates of the medium fluid, so that the rubber ring can achieve the best damping state in different working conditions, and the practicability of the vortex flowmeter is further improved.

[0071] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A vortex flowmeter sensor characterized by, The utility model relates to a vortex shedding flowmeter, which comprises: a measuring pipe (1) connected with a vortex detection unit (2); a ring groove (11) is arranged on the inner wall of the measuring pipe (1); a corrugated pipe (3) connected to the end of the measuring pipe (1) and used for connecting with a pipeline to be measured; an outer damping structure (4) sleeved on the measuring pipe (1) and connected with the corrugated pipe (3); and an inner damping structure (5) embedded in the ring groove (11); the inner damping structure (5) is provided with a mounting groove (51), and a vortex generator (6) is embedded in the mounting groove (51). The outer damping structure (4) comprises:

2. The vortex flowmeter sensor of claim 1, wherein, a first sleeve (41) sleeved on the outer circumferential surface of the measuring pipe (1); a second sleeve (42) sleeved on the outer periphery of the first sleeve (41) and having a damping space between the first sleeve (41); the second sleeve (42) is connected with the corrugated pipe (3); and a plurality of damping springs (43) arranged at equal intervals in the circumferential direction in the damping space. The first sleeve (41) comprises two first clamps (411) clamped on the outer periphery of the measuring pipe (1); and the second sleeve (42) comprises two second clamps (421).

3. The vortex flowmeter sensor of claim 2, wherein, An installation space is formed between the abutting surfaces of the two first clamps (411), and a damping buffer structure (44) is connected in the installation space.

4. The vortex flowmeter sensor of claim 3, wherein, The damping buffer structure (44) comprises:

5. The vortex flowmeter sensor of claim 4, wherein, a sleeve (441) arranged on the abutting surface of one of the first clamps (411); a sleeve rod (442) arranged on the abutting surface of the other first clamp (411) and having one end extending into the sleeve (441); and a damping strip (443) embedded on the side wall of the sleeve rod (442) and used for forming a damping fit with the inner wall of the sleeve (441). Air holes (444) are formed in the side wall of the sleeve (441).

6. The vortex flowmeter sensor of claim 5, wherein, Rubber pads (412) are arranged on the inner side surfaces of the two first clamps (411).

7. The vortex flowmeter sensor of claim 3, wherein, The abutting ends of the second clamps (421) are provided with outwardly extending connecting portions (422), the connecting portions (422) of the two second clamps (421) correspond in the radial direction and are connected by bolts (423).

8. The vortex flowmeter sensor of claim 3, wherein, The end of the corrugated pipe (3) is connected with a flange (31), the outer circumferential surface of the second sleeve (42) is provided with a mounting seat (45), and the flange (31) and the mounting seat (45) are connected by a screw rod (46).

9. The vortex flowmeter sensor of claim 2, wherein, The inner damping structure (5) is a rubber ring, the rubber ring has an adjusting cavity (52), and the rubber ring is further connected with an air inlet pipe (53), one end of the air inlet pipe (53) extends into the adjusting cavity (52).

10. The vortex flowmeter sensor of claim 1 wherein, ​

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