Vortex shedding flowmeter

Abstract

The utility model relates to the technical field of fluid flow measurement, in particular to a vortex shedding flowmeter which comprises a measuring tube, a generating body arranged in the measuring tube and a gauge outfit arranged on one side of the measuring tube, a fixing tube is arranged below the gauge outfit, a sensor is arranged on one side, away from the gauge outfit, of the fixing tube, and the bottom of the sensor is located in the measuring tube. The sensor is connected with the meter head through a fixing pipe, the fixing pipe is sequentially sleeved with a supporting pipe and a flow stopping pipe in the direction from the measuring pipe to the meter head, one end of the supporting pipe is installed on the side wall of the measuring pipe, the supporting pipe is communicated with the measuring pipe, a sleeve is obliquely arranged on one side of the flow stopping pipe, and the sleeve and the flow stopping pipe are of an integrated structure. The top of the sleeve is installed in the middle of the flow stopping pipe, a sealing cover is arranged at the end, away from the flow stopping pipe, of the sleeve, and a spring and a ball are sequentially arranged in the sleeve in the direction from the sealing cover to the flow stopping pipe. The utility model provides a vortex shedding flowmeter capable of loading and unloading measuring elements without closing a pipeline, which is used for overcoming the defects in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid flow measurement, in particular to a vortex flowmeter. Background Art

[0002] A vortex flowmeter is an instrument used to measure the volume flow rate, standard volume flow rate, or mass flow rate of gases, steam, or liquids. It calculates flow rate by detecting the frequency of vortices generated by the fluid flow based on the Karman vortex street principle. A vortex flowmeter primarily consists of two components: a vortex generator and a detection element. When a fluid flows through a pipe, it encounters the vortex generator, generating backflow and vortices. These vortices are asymmetrically arranged downstream of the vortex generator, forming what is known as a "Karman vortex street." By measuring the frequency of these vortices, the flow velocity and, therefore, the flow rate can be calculated. Vortex flowmeters are widely used in industries such as chemical, petroleum, metallurgy, and power generation due to their simple structure, wide measurement range, high accuracy, low pressure loss, and easy maintenance. To more effectively detect the frequency of backflow and vortex formation generated by the vortex generator, the detection element is positioned downstream of the generator to capture the signal of the backflow and vortex formation. The captured vortex signals are then amplified and shaped, and converted into electrical pulse signals corresponding to the vortex frequency. These pulse signals are then counted or measured by electronic devices such as counters or frequency meters to calculate the fluid flow rate.

[0003] However, during long-term use, the detection element will be continuously impacted by the fluid, causing the detection element to be damaged. This makes it difficult for the detection element to accurately capture the signal generating the vortex when used for a long time, thereby affecting the accuracy of the flow detection. In order to ensure the accuracy of the measured fluid flow, the detection element needs to be inspected and maintained regularly in order to judge the reliability of the detection element. Since the detection part of the measuring element is directly inserted into the pipeline that conveys the fluid, directly removing the measuring element from the pipeline will cause leakage. Therefore, when maintaining the detection element, it is necessary to first close the valve upstream of the vortex flowmeter to stop the pipeline from conveying the fluid, so as to facilitate the removal of the measuring element for inspection and maintenance. However, for industrial processes that require continuous production, closing the pipeline for conveying will affect the continuity of production, thereby increasing production costs. For this reason, there is room for improvement in the detection and maintenance methods of the vortex flowmeter to achieve the requirement of loading and unloading the measuring element without closing the pipeline, thereby reducing the time and cost of production interruption and better meeting the use requirements of the vortex flowmeter. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the utility model provides a vortex flowmeter capable of loading and unloading a measuring element without closing a pipeline, so as to overcome the defects in the prior art.

[0005] The technical solution adopted by the utility model is: a vortex flowmeter, comprising a measuring tube, a generator arranged in the measuring tube and a header arranged on one side of the measuring tube, a fixed tube is arranged below the header, a sensor is arranged on the side of the fixed tube away from the header, the bottom of the sensor is located in the measuring tube, the sensor is connected to the header through the fixed tube, a support tube and a stop tube are sequentially mounted on the fixed tube along the direction from the measuring tube to the header, one end of the support tube is mounted on the side wall of the measuring tube, the support tube and the measuring tube are connected, a sleeve is obliquely arranged on one side of the stop tube, the sleeve and the stop tube are an integrated structure, the top of the sleeve is mounted in the middle of the stop tube, a sealing cover is provided at one end of the sleeve away from the stop tube, a spring and a ball are sequentially arranged in the sleeve along the direction from the sealing cover to the stop tube, the inner cavity diameter of the stop tube is not larger than the diameter of the sphere, a sleeve groove is opened in the middle of the inner cavity of the stop tube, the diameter of the sleeve groove is not smaller than the diameter of the sphere, the sleeve groove is connected to the sleeve, and the sphere is in contact with the fixed tube.

[0006] Preferably, a sealing tube is provided between the meter head and the flow stop tube, the inner cavity diameter of the sealing tube is not smaller than the inner cavity diameter of the flow stop tube, and the first pressure ring, the filling ring and the second pressure ring are interference fit in the sealing tube in sequence along the direction from the meter head to the flow stop tube, the first pressure ring, the filling ring and the second pressure ring are all interference fit on the fixed tube, the first pressure ring contacts the bottom of the meter head, the second pressure ring contacts the end of the flow stop tube, and the filling ring is squeezed between the meter head and the flow stop tube by the first pressure ring and the second pressure ring.

[0007] Preferably, the two ends of the sealing tube, the two ends of the flow stop tube and the top of the support tube are respectively provided with a first flange, the first flange is installed on the sealing tube, the flow stop tube or the support tube, the two ends of the flow stop tube are respectively connected to the sealing tube and the support tube through the first flange, and the top of the sealing tube is connected to the meter head through the first flange.

[0008] Preferably, the top thread of the sensor is sleeved on the fixed tube, and a tapered hole is provided at the bottom of the inner cavity of the fixed tube. The aperture of the tapered hole gradually increases in the direction away from the meter head. A first sealing ring made of elastic material is sleeved in the tapered hole. The shape of the first sealing ring is consistent with the shape of the inner cavity of the tapered hole, and the first sealing ring is interference fit on the sensor.

[0009] Preferably, the sealing cap adopts a stepped circular plate structure, the diameter of one side of the sealing cap matches the outer wall diameter of the sleeve, and the diameter of the other side of the sealing cap matches the inner cavity diameter of the sleeve. The second sealing ring is interference-fitted on the other side of the sealing cap, and the two sides of the second sealing ring are respectively in contact with the other side of the sealing cap and the end of the sleeve. The side of the sealing cap that passes through the second sealing ring is located in the sleeve. Several auxiliary ears are provided on one side of the sealing cap and the side of the sleeve close to the sealing cap. The several auxiliary ears are evenly installed on the outer wall of the sealing cap or the sleeve, and the sleeve and the sealing cap are connected through the auxiliary ears.

[0010] Preferably, the plurality of auxiliary ears are respectively provided with through-holes, bolts are fitted on the through-holes, nuts are threadedly fitted on the bolts, the auxiliary ears provided on the cover and the auxiliary ears provided on the sleeve are clamped on the bolts through nuts, and the thickness of the auxiliary ears is not greater than the thickness of one side of the cover.

[0011] Preferably, the measuring tube is provided with two second flanges, which are respectively installed at both ends of the measuring tube.

[0012] The beneficial effects of the present invention are as follows: first, the present invention, through the provision of a spring and a ball and the sleeve groove provided on the stop tube, can, after the fixed tube and the sensor are moved above the sleeve, drive the ball to move into the sleeve groove by the spring, thereby using the ball to seal the inner cavity of the stop tube, so as to prevent the fluid transported in the measuring tube from being discharged from the stop tube, thereby preventing the fluid transported in the measuring tube from leaking from the stop tube, thereby achieving the requirement of loading and unloading the sensor without closing the pipeline, thereby facilitating the detection and maintenance of the sensor. Moreover, the present invention is provided with a fixed tube to fix the sensor to the bottom of the meter head, thereby facilitating the use of a wire to transmit the signal generated by the sensor when generating a vortex to the meter head, and the provision of a support tube facilitates the assembly of the stop tube onto the measuring tube.

[0013] Secondly, the present invention seals the gap between the sealing tube and the fixed tube by providing a first pressure ring, a packing ring, and a second pressure ring. The first pressure ring, the packing ring, and the second pressure ring are squeezed by the meter head and the stop tube to improve the sealing reliability of the first pressure ring, the packing ring, and the second pressure ring, thereby preventing leakage from the outside of the fixed tube. Furthermore, the present invention uses a first flange provided on the sealing tube, the stop tube, and the support tube to respectively assemble the sealing tube and the support tube to the two sides of the stop tube, and to assemble the meter head to the sealing tube, thereby facilitating the installation and removal of the meter head, the sealing tube, and the stop tube, and facilitating maintenance of the present invention.

[0014] Thirdly, the present invention provides a fixed tube with a tapered hole at the bottom thereof and a first sealing ring fitted in the tapered hole to seal the inner cavity of the fixed tube, thereby preventing the fluid transported by the measuring tube from entering the fixed tube. Since the first sealing ring and the tapered hole both adopt a conical structure, the fluid transported in the measuring tube or the ball in the stop tube will squeeze the sensor when it moves toward the fixed tube, which will drive the first sealing ring to move toward the top of the fixed tube. Since the aperture of the tapered hole gradually increases in the direction away from the meter head, the first sealing ring moving toward the top of the fixed tube will be tightly pressed between the fixed tube and the sensor to improve the sealing effect of the inner cavity of the fixed tube and prevent the sensor from moving. In addition, the present invention seals the gap between the sleeve and the cover by providing a second sealing ring, thereby facilitating leakage of the sleeve. The cover is assembled to the sleeve by providing an auxiliary ear, bolts and nuts, thereby facilitating the use of the cover to squeeze one side of the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the present utility model.

[0016] Figure 2 It is a structural diagram of the present utility model.

[0017] Figure 3 for Figure 2 Enlarged schematic diagram of point A in the middle.

[0018] Figure 4 for Figure 2 Enlarged schematic diagram of point B in the middle.

[0019] Figure 5 This is an exploded view of the assembly of the meter head and sensor in this utility model.

[0020] Figure 6 This is an exploded view of the assembly of the stop flow tube, the sealing cover and the second sealing ring of the utility model. DETAILED DESCRIPTION

[0021] like Figures 1 to 6As shown, a vortex flowmeter comprises a measuring tube 1, a generator 2 arranged in the measuring tube 1 and a meter head 3 arranged on one side of the measuring tube 1, a fixed tube 4 is arranged below the meter head 3, a sensor 5 is arranged on the side of the fixed tube 4 away from the meter head 3, the bottom of the sensor 5 is located in the measuring tube 1, the sensor 5 is connected to the meter head 3 through the fixed tube 4, and a support tube 6 and a stop tube 7 are sequentially mounted on the fixed tube 4 along the direction from the measuring tube 1 to the meter head 3. One end of the support tube 6 is installed on the side wall of the measuring tube 1, the support tube 6 and the measuring tube 1 are connected, and the stop tube 7 A sleeve 8 is obliquely provided on one side of the flow tube 7. The sleeve 8 and the stop tube 7 are an integrated structure. The top of the sleeve 8 is installed in the middle of the stop tube 7. A cover 9 is provided at the end of the sleeve 8 away from the stop tube 7. A spring 10 and a ball 11 are sequentially provided in the sleeve 8 along the direction from the cover 9 to the stop tube 7. The inner cavity diameter of the stop tube 7 is not larger than the diameter of the ball 11. A sleeve groove 12 is provided in the middle of the inner cavity of the stop tube 7. The diameter of the sleeve groove 12 is not smaller than the diameter of the ball 11. The sleeve groove 12 is connected to the sleeve 8, and the ball 11 is in contact with the fixed tube 4. By pushing and pulling the meter head 3 and the fixed tube 4, the fixed tube 4 can be driven to move in the stop tube 7. For this reason, after the fixed tube 4 and the sensor 5 are moved to the top of the sleeve 8, the ball 11 moves into the sleeve groove 12 under the squeezing action of the spring 10, and squeezes the ball 11 on the top of the stop tube 7, so that the ball 11 is used to seal the inner cavity of the stop tube 7 to prevent the transported fluid from being discharged from the stop tube 7, thereby facilitating the removal of the sensor 5 for inspection and maintenance.

[0022] In this embodiment, a sealing tube 13 is provided between the meter head 3 and the flow stop tube 7. The inner cavity diameter of the sealing tube 13 is not less than the inner cavity diameter of the flow stop tube 7. The first pressure ring 14, the filling ring 15 and the second pressure ring 16 are interference-fitted in the sealing tube 13 in the direction from the meter head 3 to the flow stop tube 7. The first pressure ring 14, the filling ring 15 and the second pressure ring 16 are all interference-fitted on the fixed tube 4. The first pressure ring 14 contacts the bottom of the meter head 3, and the second pressure ring 16 contacts the end of the flow stop tube 7. The filling ring 15 is squeezed between the meter head 3 and the flow stop tube 7 by the first pressure ring 14 and the second pressure ring 16, thereby sealing the outside of the fixed tube 4.

[0023] Specifically, the two ends of the sealing tube 13, the two ends of the flow stop tube 7 and the top of the support tube 6 are respectively provided with a first flange 17, the first flange 17 is installed on the sealing tube 13, the flow stop tube 7 or the support tube 6, the two ends of the flow stop tube 7 are respectively connected to the sealing tube 13 and the support tube 6 through the first flange 17, and the top of the sealing tube 13 is connected to the meter head 3 through the first flange 17 to facilitate the loading and unloading of the meter head 3, the sealing tube 13 and the flow stop tube 7.

[0024] Please refer again Figure 2 、 3The top thread of the sensor 5 described in 5 is sleeved on the fixed tube 4, and a tapered hole 18 is opened at the bottom of the inner cavity of the fixed tube 4. The aperture of the tapered hole 18 gradually increases in the direction away from the meter head 3. A first sealing ring 19 made of elastic material is sleeved in the tapered hole 18. The shape of the first sealing ring 19 is consistent with the shape of the inner cavity of the tapered hole 18. The first sealing ring 19 is interference fit on the sensor 5, thereby sealing the gap between the sensor 5 and the fixed tube 4. When the sensor 5 is inserted into the stop tube 7 or is located in the measuring tube 1, the fluid transported in the measuring tube 1 or the ball 11 in the stop tube 7 will squeeze the sensor 5 toward the fixed tube 4, thereby driving the first sealing ring 19 to move toward the top of the fixed tube 4. Since the aperture of the tapered hole 18 gradually increases in the direction away from the meter head 3, the first sealing ring 19 will be tightly pressed between the fixed tube 4 and the sensor 5, thereby improving the sealing effect between the sensor 5 and the fixed tube 4 and preventing the sensor 5 from moving.

[0025] In this embodiment, the sealing cover 9 adopts a stepped circular plate structure. The diameter of one side of the sealing cover 9 is consistent with the outer wall diameter of the sleeve 8, and the diameter of the other side of the sealing cover 9 is consistent with the inner cavity diameter of the sleeve 8. The other side of the sealing cover 9 is interference-fitted with a second sealing ring 20. The two sides of the second sealing ring 20 are respectively in contact with the other side of the sealing cover 9 and the end of the sleeve 8. The second sealing ring 20 is used to seal the gap between the sleeve 8 and the sealing cover 9 to prevent leakage in the gap between the sleeve 8 and the sealing cover 9. The side of the sealing cover 9 that passes through the second sealing ring 20 is located in the sleeve 8. A plurality of auxiliary ears 21 are provided on one side of the sealing cover 9 and the side of the sleeve 8 close to the sealing cover 9. The plurality of auxiliary ears 21 are evenly installed on the outer wall of the sealing cover 9 or the sleeve 8, and the sleeve 8 and the sealing cover 9 are connected through the auxiliary ears 21.

[0026] Specifically, each of the plurality of auxiliary ears 21 is provided with a through-hole 22, a bolt 23 is fitted on the through-hole 22, a nut 24 is threadedly fitted on the bolt 23, and the auxiliary ear 21 provided on the cover 9 and the auxiliary ear 21 provided on the sleeve 8 are clamped on the bolt 23 by the nut 24. The thickness of the auxiliary ear 21 is no greater than the thickness of one side of the cover 9, thereby facilitating the assembly and disassembly of the cover 9.

[0027] Please refer again Figure 1 and 2 The measuring tube 1 is provided with two second flanges 25 , which are respectively mounted at both ends of the measuring tube 1 , thereby facilitating installation on the pipeline with the aid of the second flanges 25 .

[0028] The assembly method of this product is as follows: Figures 1 to 6As shown, first, use a tool such as a welding gun to secure the support tube 6 to the outer wall of the measuring tube 1, then install the hole opener on the support tube 6, ensuring that the hole opener's drill bit is facing the measuring tube 1. The hole opener is then operated to open a hole in the side wall of the measuring tube 1. Next, the hole opener's drill bit is controlled to move from the measuring tube 1 to the support tube 6. After the hole opener's drill bit leaves the support tube 6, the hole opener is removed from the support tube 6. Next, the ball 11 and spring 10 are sequentially placed into the sleeve 8, and the second sealing ring is fitted onto the cover 9. The cover 9 is assembled onto the end of the sleeve 8 away from the stop tube 7 using bolts 23 and nuts 24. As a result, the ball 11 is squeezed into the sleeve groove 12 under the elastic force of the spring 10. Afterwards, with the help of the first flange 17, the stop tube 7 and the sealing tube 13 are assembled on the support tube 6 in sequence, and the second pressure ring 16, the packing ring 15 and the first pressure ring 14 are inserted into the sealing tube 13 in sequence, so that the second pressure ring 16 and the top of the stop tube 7 are in contact. Finally, the first sealing ring 19 is put on the sensor 5, and the top of the sensor 5 is screwed into the bottom of the fixed tube 4, so that the first sealing ring 19 is tightly attached to the tapered hole 18. After the sensor 5 is installed, the fixed tube 4 is inserted into the sealing tube 13, so that the sensor 5 moves toward the measuring tube 1. When the sensor 5 contacts the ball 11, the ball 11 and the spring 10 are compressed, causing the ball 11 to move toward the cover 9, so that the bottom end of the sensor 5 penetrates the support tube 6, making it easier for the detection part of the sensor 5 to enter the measuring tube 1. Then, install the meter head 3 on the first flange 17 at the top of the sealing tube 13, so that the first pressure ring 14, packing ring 15, and second pressure ring 16 are squeezed between the meter head 3 and the stop tube 7, thus completing the assembly of this product. After completing the transfer of this product, it is necessary to test the detection accuracy of the sensor 5. To do this, it is necessary to assemble this product on the calibration pipeline and install a standard flow meter on the calibration pipeline. By comparing the flow measurement data of the two, the product's compliance is verified.

[0029] It should be noted that to ensure accurate measurement data, the product should be installed in the user's pipeline. The upstream straight section should be at least 10 pipe diameters long, and the downstream straight section should be at least 5 pipe diameters long. This prevents turbulence caused by fluid diversion from affecting the product's flow rate measurement. Furthermore, when inspecting and maintaining sensor 5, the meter head 3 must first be removed from the first flange 17 at the top of the sealing tube 13. By pulling the meter head 3 and the fixing tube 4, the fixing tube 4 and sensor 5 are moved along the direction from the measuring tube 1 to the support tube 6. As the fixing tube 4 and sensor 5 move above the sleeve 8, the spring 10 forces the ball 11 into the sleeve groove 12 and presses it against the top of the stop tube 7. This seals the inner cavity of the stop tube 7, preventing the transported fluid from escaping and facilitating inspection and maintenance of sensor 5.

[0030] Through this embodiment, by providing the spring 10 and the ball 11 and the sleeve groove 12 provided in the stop tube 7, after the fixed tube 4 and the sensor are moved above the sleeve 8, the spring 10 drives the ball 11 to move into the sleeve groove 12, thereby using the ball 11 to seal the inner cavity of the stop tube 7, so as to prevent the fluid transported in the measuring tube 1 from being discharged from the stop tube 7, thereby preventing the fluid transported by the measuring tube 1 from leaking from the stop tube 7, thereby achieving the requirement of loading and unloading the sensor 5 without closing the pipeline, so as to facilitate the inspection and maintenance of the sensor 5. In addition, the fixed tube 4 provided in the utility model is used to fix the sensor 5 to the bottom of the meter head 3, so as to facilitate the use of a wire to transmit the signal generated by the vortex captured by the sensor 5 to the meter head 3, and the support tube 6 is provided to facilitate the assembly of the stop tube 7 onto the measuring tube 1.

[0031] The embodiments described above are only preferred embodiments of the present invention and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structure, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A vortex flowmeter comprising a measuring tube (1), a shedder (2) disposed in the measuring tube (1), and a meter head (3) disposed on one side of the measuring tube (1), characterized in that: A fixed tube (4) is provided below the meter head (3), a sensor (5) is provided on the side of the fixed tube (4) away from the meter head (3), the bottom of the sensor (5) is located in the measuring tube (1), the sensor (5) is connected to the meter head (3) through the fixed tube (4), a support tube (6) and a stop tube (7) are sequentially provided on the fixed tube (4) along the direction from the measuring tube (1) to the meter head (3), one end of the support tube (6) is installed on the side wall of the measuring tube (1), the support tube (6) and the measuring tube (1) are connected, and a sleeve (8) is provided on one side of the stop tube (7) at an angle, the sleeve (8) and the stop tube (7) is an integrated structure, the top of the sleeve (8) is installed in the middle of the stop tube (7), a cover (9) is provided at one end of the sleeve (8) away from the stop tube (7), a spring (10) and a sphere (11) are sequentially provided in the sleeve (8) along the direction from the cover (9) to the stop tube (7), the inner cavity diameter of the stop tube (7) is not greater than the diameter of the sphere (11), a sleeve groove (12) is provided in the middle of the inner cavity of the stop tube (7), the diameter of the sleeve groove (12) is not less than the diameter of the sphere (11), the sleeve groove (12) is connected to the sleeve (8), and the sphere (11) is in contact with the fixed tube (4).

2. The vortex flowmeter according to claim 1, characterized in that: A sealing tube (13) is provided between the meter head (3) and the stop tube (7), the inner diameter of the sealing tube (13) is not less than the inner diameter of the stop tube (7), and a first pressure ring (14), a packing ring (15) and a second pressure ring (16) are interference-fitted in sequence in the direction from the meter head (3) to the stop tube (7). The first pressure ring (14), the packing ring (15) and the second pressure ring (16) are all interference-fitted on the fixed tube (4), the first pressure ring (14) contacts the bottom of the meter head (3), the second pressure ring (16) contacts the end of the stop tube (7), and the packing ring (15) is squeezed between the meter head (3) and the stop tube (7) through the first pressure ring (14) and the second pressure ring (16).

3. The vortex flowmeter according to claim 2, characterized in that: The two ends of the sealing tube (13), the two ends of the flow-stopping tube (7) and the top end of the support tube (6) are respectively provided with a first flange (17). The first flange (17) is installed on the sealing tube (13), the flow-stopping tube (7) or the support tube (6). The two ends of the flow-stopping tube (7) are respectively connected to the sealing tube (13) and the support tube (6) through the first flange (17). The top end of the sealing tube (13) is connected to the meter head (3) through the first flange (17).

4. The vortex flowmeter according to claim 1, characterized in that: The top thread of the sensor (5) is sleeved on the fixed tube (4), and a tapered hole (18) is provided at the bottom of the inner cavity of the fixed tube (4). The aperture of the tapered hole (18) gradually increases in the direction away from the meter head (3). A first sealing ring (19) made of elastic material is sleeved in the tapered hole (18). The shape of the first sealing ring (19) is consistent with the shape of the inner cavity of the tapered hole (18), and the first sealing ring (19) is interference-fitted on the sensor (5).

5. The vortex flowmeter according to claim 1, characterized in that: The cover (9) adopts a stepped circular plate structure, the diameter of one side of the cover (9) coincides with the outer wall diameter of the sleeve (8), the diameter of the other side of the cover (9) coincides with the inner cavity diameter of the sleeve (8), the second sealing ring (20) is interference-fitted on the other side of the cover (9), the two sides of the second sealing ring (20) are in contact with the other side of the cover (9) and the end of the sleeve (8), the side of the cover (9) passing through the second sealing ring (20) is located in the sleeve (8), one side of the cover (9) and the side of the sleeve (8) close to the cover (9) are both provided with a plurality of auxiliary ears (21), the plurality of auxiliary ears (21) are evenly installed on the outer wall of the cover (9) or the sleeve (8), and the sleeve (8) and the cover (9) are connected through the auxiliary ears (21).

6. The vortex flowmeter according to claim 5, characterized in that: The plurality of auxiliary ears (21) are respectively provided with through holes (22), bolts (23) are sleeved on the through holes (22), nuts (24) are threadedly sleeved on the bolts (23), the auxiliary ears (21) provided on the cover (9) and the auxiliary ears (21) provided on the sleeve (8) are clamped on the bolts (23) through the nuts (24), and the thickness of the auxiliary ears (21) is not greater than the thickness of one side of the cover (9).

7. The vortex flowmeter according to claim 1, characterized in that: The measuring tube (1) is sleeved with two second flanges (25), which are respectively installed at both ends of the measuring tube (1).

Images