A vortex flowmeter

Abstract

The utility model provides a vortex shedding flowmeter relates to vortex shedding flow measurement technical field, including the communicating pipeline and pressure sensor, pressure sensor sets up in the tail end of communicating pipeline, the communicating pipeline is opened in and has the communicating hole, the communicating hole passes on the medium flowing in the communicating pipeline to pressure sensor, there is the included angle between the axial direction of communicating hole and the axial direction of communicating pipeline, to make pressure response ware is located the hole direction of communicating hole outside. Through setting the included angle between the axial direction of communicating hole and the axial direction of communicating pipeline, can when vortex shedding flowmeter works, avoid the medium in the communicating pipeline and directly towards pressure sensor injection through the communicating hole, thereby protects pressure sensor from the impact of the medium in the communicating pipeline, prolongs the service life of pressure sensor, and then enhances the adaptability of vortex shedding flowmeter to different working scene.

Description

Technical Field

[0001] This utility model relates to the field of vortex flow measurement technology, and in particular to a vortex flow meter. Background Technology

[0002] Vortex flow meters, widely used for measuring the flow rate of gases, liquids, and steam, are based on the Karman vortex street principle. They obtain volumetric flow rate by detecting the linear relationship between vortex frequency and flow velocity. To improve measurement accuracy, temperature and pressure compensation methods are often used, which correct the volumetric flow rate based on the temperature, pressure, and density of the medium to obtain an accurate mass flow rate. This type of flow meter has a wide range of applicable operating conditions, covering medium temperatures from -200℃ to 450℃.

[0003] However, in practical applications, especially under high temperature and high pressure conditions, certain technical limitations have been exposed. Traditional vortex flowmeters typically have a shut-off valve installed in the pressure acquisition pipeline to facilitate the maintenance of the pressure sensor. Due to the opening and closing operation of the shut-off valve and its internal structure, it can directly generate or transmit severe pressure fluctuations (water hammer effect). The pressure sensor may be damaged by the impact of pressure fluctuations, shortening its service life. This problem urgently needs to be solved. Utility Model Content This invention provides a vortex flow meter to solve the technical problem that the pressure sensor is easily damaged by pressure fluctuations during the measurement process of the vortex flow meter.

[0004] The vortex flow meter provided by this utility model includes: Connecting pipes; A pressure sensor is disposed at the tail end of the connecting pipe; The connecting pipe has a connecting hole that transmits the medium flowing in the connecting pipe to the pressure sensor. There is an angle between the axis of the connecting hole and the axis of the connecting pipe, so that the pressure sensor is located outside the hole of the connecting hole.

[0005] In one embodiment of the present invention, the connecting pipe includes a rectifying section, the medium in the rectifying section flows to the pressure sensor through the connecting hole, the rectifying section is provided with a rectifying element, the rectifying element divides the rectifying section into a first part and a second part, the first part is connected to one end of the connecting pipe, and the second part is connected to the other end of the connecting pipe.

[0006] In one embodiment of the present invention, a first heat dissipation structure is provided on the outer wall of the rectifier section.

[0007] In one embodiment of the present invention, the first heat dissipation structure includes a heat dissipation protrusion that protrudes radially along the rectifier section. The heat dissipation protrusion is arranged around the axial direction of the rectifier section. A plurality of the first heat dissipation structures are provided on the outer wall of the rectifier section. The first heat dissipation structures are arranged sequentially at intervals along the axial direction of the rectifier section.

[0008] In one embodiment of the present invention, a second heat dissipation structure is provided on the inner wall of the rectifier section.

[0009] In one embodiment of the present invention, the second heat dissipation structure includes a heat dissipation groove recessed radially along the rectifier section. The heat dissipation groove is arranged around the axial direction of the rectifier section. A plurality of second heat dissipation structures are provided on the inner wall of the rectifier section. The second heat dissipation structures are arranged sequentially at intervals along the axial direction of the rectifier section.

[0010] In one embodiment of this utility model, a shut-off valve is connected to the beginning of the connecting pipe, and the pressure tapping pipe is connected to the connecting pipe through the shut-off valve.

[0011] In one embodiment of the present invention, the shut-off valve includes a valve body assembly and a valve needle assembly. The valve body assembly has a through hole for inserting the valve needle assembly. The valve needle assembly is at least partially inserted into the through hole along the hole direction, and the valve needle assembly is threadedly connected to the valve body assembly. The valve body assembly has a pressure tapping hole communicating with the pressure tapping tube. The valve needle assembly reciprocates along the hole direction of the through hole. The pressure tapping hole is located on the movement trajectory of the valve needle assembly, and the valve needle assembly is used to block the pressure tapping hole.

[0012] In one embodiment of the present invention, the valve body assembly includes a valve body body, a first connecting portion, and a second connecting portion. The valve body body, the first connecting portion, and the second connecting portion are sequentially connected along the hole direction of the through hole. The valve needle assembly includes a valve needle body and a valve stem sequentially connected along the hole direction of the through hole. The valve needle body is closer to the pressure tapping hole than the valve stem. The valve stem is at least partially located in the pressure tapping hole corresponding to the second connecting portion, and the valve stem is threadedly connected to the second connecting portion.

[0013] In one embodiment of the present invention, a first sealing element is sleeved on the valve needle body, a first limiting step is provided on the hole wall of the through hole corresponding to the first connecting part, the first limiting step is arranged around the axial direction of the through hole, the first connecting part and the second connecting part are threadedly connected, and the second connecting part presses the first sealing element on the first limiting step.

[0014] The beneficial effects of this utility model are as follows: The vortex flow meter proposed in this utility model, by setting an angle between the axial direction of the connecting hole and the axial direction of the connecting pipe, can prevent the medium in the connecting pipe from being directly sprayed towards the pressure sensor through the connecting hole when the vortex flow meter is working, thereby protecting the pressure sensor from the impact of the medium in the connecting pipe, extending the service life of the pressure sensor, and thus improving the adaptability of the vortex flow meter to different working scenarios. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0016] In the attached diagram: Figure 1 This is a schematic diagram of the structure of a vortex flowmeter provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the connecting pipe of a vortex flowmeter provided in one embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of the vortex flowmeter shut-off valve provided in one embodiment of the present invention.

[0017] The attached figures are labeled as follows: 1. Pressure tapping tube; 2. Valve body assembly; 201. Valve body; 201. Pressure tapping hole; 2011. Second seal; 202. Connecting nut; 203. First limiting step; 2031. Second limiting step; 2032. First seal; 204. Locking nut; 205. Compression nut; 206. Sealing gasket; 207. Valve needle assembly; 3. Valve needle body; 301. Snap-fit ​​connector; 3011. Valve stem; 302. Snap-fit ​​part; 3021. Handle; 303. Rectifying section; 4. Heat dissipation protrusion; 401. Heat dissipation groove; 402. End nut; 5. Connecting hole; 501. Pressure sensor; 6. Orifice plate; 7. Detailed Implementation

[0018] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0019] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0020] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0021] Please see Figure 1 , Figure 1 A vortex flow meter is provided as an embodiment of this utility model, such as Figure 1 As shown, the vortex flow meter includes a connecting pipe and a pressure sensor 6. The connecting pipe has a starting end and a ending end. Along the flow direction of the medium, the end where the medium enters the connecting pipe is the starting end, and the end where the medium flows out of the connecting pipe is the ending end. The pressure sensor 6 is located at the ending end of the connecting pipe. A connecting hole 501 is provided inside the connecting pipe, which transmits the medium flowing in the connecting pipe to the pressure sensor 6. There is an angle between the axial direction of the connecting hole 501 and the axial direction of the connecting pipe, so that the pressure sensor is located outside the orifice of the connecting hole 501. By setting an angle between the axial direction of the connecting hole 501 and the axial direction of the connecting pipe, the medium in the connecting pipe is prevented from being directly sprayed towards the pressure sensor 6 through the connecting hole 501 during the operation of the vortex flow meter. This protects the pressure sensor 6 from the impact of the medium in the connecting pipe, extends the service life of the pressure sensor 6, and improves the adaptability of the vortex flow meter to different working scenarios.

[0022] In this embodiment, the connecting pipe includes a rectifier section 4 and a connecting section connected sequentially along the axial direction of the connecting pipe. The rectifier section 4 and the connecting section are threaded together. A connecting hole 501 is opened in the connecting section. The connecting section is an end nut 5. The end of the end nut 5 opposite to the rectifier section 4 is connected to the pressure sensor 6 by a thread.

[0023] In an exemplary embodiment, the connecting pipe includes a rectifying section 4. The medium within the rectifying section 4 flows to the pressure sensor 6 through a connecting hole 501. A rectifying element is provided within the rectifying section 4, dividing the rectifying section 4 into a first part and a second part. The first part is connected to one end of the connecting pipe, and the second part is connected to the other end of the connecting pipe. By providing a rectifying element in the rectifying section 4, the energy of turbulence can be consumed through rectification to balance the flow velocity. Simultaneously, the flow field flowing through the rectifying element can be optimized, the vortex shear stabilized, and the measurement accuracy of the vortex flowmeter improved, achieving the effects of stable signal, improved signal-to-noise ratio, and wider range ratio. In this embodiment, the rectifying element is an orifice plate 7. The orifice plate 7 has advantages such as simple structure, low manufacturing cost, high mechanical strength, excellent pressure and impact resistance, resistance to clogging, and higher tolerance to media. In some embodiments, the rectifying element can be a screen, honeycomb structure, or grid. The type of rectifying element can be adjusted according to actual needs.

[0024] In an exemplary embodiment, a first heat dissipation structure is provided on the outer wall of the rectifier section 4. Because the vortex flowmeter operates in high-temperature environments, some electronic components within the pressure sensor 6 may experience signal drift due to the high temperature, leading to inaccurate pressure / differential pressure measurements, or even burning out the chip of the pressure sensor 6 or permanently degrading its performance. By providing the first heat dissipation structure, a "thermal buffer zone" is established between the pressure sensor 6 and the high-temperature medium. Through heat conduction and external heat radiation, the heat transferred from the medium is effectively dissipated, reducing the temperature of the medium reaching the pressure sensor 6 to within the safe operating temperature range of the pressure sensor 6.

[0025] In this embodiment, the first heat dissipation structure includes a heat dissipation protrusion 401 that protrudes radially along the rectifying section 4, and the heat dissipation protrusion 401 is arranged around the axial direction of the rectifying section 4. The heat dissipation protrusion 401 significantly increases the surface area in contact with the surrounding cooling air (or environment), and can uniformly dissipate heat from the outer wall of a certain point of the rectifying section 4 in the circumferential direction, resulting in good heat dissipation effect. Furthermore, due to its simple structure and low manufacturing cost, it has good economic efficiency. In some embodiments, the first heat dissipation structure may be a heat sink or a cooling water tank, etc. The type of the first heat dissipation structure can be adjusted according to actual needs.

[0026] In this embodiment, a plurality of first heat dissipation structures are provided on the outer wall of the rectifier section 4. The first heat dissipation structures are arranged sequentially at intervals along the axial direction of the rectifier section 4. The arrangement of multiple first heat dissipation structures can improve the heat dissipation effect of the medium in the rectifier section 4. The spacing between the first heat dissipation structures can increase the contact area between the first heat dissipation structures and the air, which is beneficial for heat dissipation.

[0027] In an exemplary embodiment, a second heat dissipation structure is provided on the inner wall of the rectifier section 4. This second heat dissipation structure increases the contact area between the medium within the rectifier section 4 and its inner wall, thereby accelerating the heat exchange efficiency between the medium and the rectifier section 4, and ultimately improving the cooling effect of the rectifier section 4 on the medium. In this embodiment, the second heat dissipation structure includes a heat dissipation groove 402 recessed radially along the rectifier section 4. The heat dissipation groove is arranged around the axial direction of the rectifier section 4. Multiple second heat dissipation structures are provided on the inner wall of the rectifier section 4, arranged sequentially at intervals along the axial direction of the rectifier section 4. In some embodiments, the second heat dissipation structure may include multiple protrusions or multiple circular pits. The type of the second heat dissipation structure can be adjusted according to actual needs.

[0028] In an exemplary embodiment, a shut-off valve is connected to the beginning of the connecting pipeline, and the pressure tap 1 is connected to the connecting pipeline through the shut-off valve. The pressure sensor 6 itself may require periodic calibration, maintenance, or even replacement due to accidental damage. If a shut-off valve is not installed, the entire pipeline process must be stopped and the medium drained when disassembling the pressure sensor 6, which would cause significant production interruptions and economic losses. With the shut-off valve installed, the pressure sensor can be safely isolated from the process pipeline simply by closing the shut-off valve, enabling online maintenance without affecting the operation of the main process.

[0029] In an exemplary embodiment, the shut-off valve includes a valve body assembly 2 and a valve needle assembly 3. The valve body assembly 2 has a through hole for inserting the valve needle assembly 3. The valve needle assembly 3 is at least partially inserted into the through hole along the orifice direction of the through hole, and the valve needle assembly 3 is threadedly connected to the valve body assembly 2. The valve body assembly 2 has a pressure tapping hole 2011 communicating with the pressure tapping tube 1. The valve needle assembly 3 reciprocates along the orifice direction of the through hole. The pressure tapping hole 2011 is located on the movement trajectory of the valve needle assembly 3, and the valve needle assembly 3 is used to block the pressure tapping hole 2011. This allows the shut-off valve to have advantages such as high reliability and sealing performance, strong adjustability, and good resistance to high pressure and high temperature.

[0030] In an exemplary embodiment, the valve body assembly 2 includes a valve body 201, a first connecting portion, and a second connecting portion. The valve body 201, the first connecting portion, and the second connecting portion are sequentially connected along the through-hole direction. The valve needle assembly 3 includes a valve needle body 301 and a valve stem 302 sequentially connected along the through-hole direction. The valve needle body 301 is closer to the pressure tapping hole 2011 than the valve stem 302. One end of the valve needle body 301 that blocks the pressure tapping hole 2011 is conical, with a cone angle of 15° to 30°. The pressure tapping hole 2011 is located on the valve body 201. After at least a portion of the conical end of the valve needle body 301 enters the pressure tapping hole 2011, it closes the pressure tapping hole 2011, thereby cutting off the continued flow of the medium into the connecting pipe. The valve stem 302 is at least partially located within the pressure tapping hole 2011 corresponding to the second connecting portion, and the valve stem 302 is threadedly connected to the second connecting portion. By including the valve needle assembly 3 of the gate valve as a valve needle body 301 and valve stem 302 connected in sequence, the valve needle body 301 can be machined with high precision separately, without having to machine the entire valve needle assembly 3 with high precision. While ensuring the sealing effect of the valve needle assembly 3 on the medium, the processing technology and cost of the valve needle assembly 3 are simplified, and the manufacturing cost of the gate valve is reduced.

[0031] In this embodiment, the valve stem 302 has a fork-shaped locking portion 3021 at one end connected to the valve needle body 301, and the valve needle body 301 has a locking connector 3011 at the other end connected to the valve stem 302 for locking onto the fork-shaped locking portion 3021, thereby limiting the valve needle body 301 in the axial direction of the valve stem 302. Since the locking portion 3021 does not limit the circumferential direction of the valve needle body 301, during the rotation of the valve stem 302, the valve needle body 301 only makes linear movement along the axial direction of the valve stem 302. Therefore, during the process of the valve needle body 301 blocking the pressure tapping hole 2011, the wear of the pressure tapping hole 2011 opening on the valve needle body 301 can be reduced, thereby extending the service life of the valve needle body 301.

[0032] In one exemplary embodiment, a first sealing element 204 is fitted onto the valve needle body 301. A first limiting step 2031 is provided on the wall of the through hole corresponding to the first connecting portion. The first limiting step 2031 is arranged around the axial direction of the through hole. The first connecting portion and the second connecting portion are threadedly connected, and the second connecting portion presses the first sealing element 204 against the first limiting step 2031. By providing the first sealing element 204, the gap between the valve needle body 301 and the first connecting portion can be sealed, preventing the medium passing through the shut-off valve from leaking to the outside and polluting the external environment.

[0033] In this embodiment, the first connecting portion includes a connecting nut 203 and a clamping nut 206. Along the axial direction of the through hole, the connecting nut 203 and the locking nut 205 are sequentially threaded together, and their axial directions coincide. The central holes of the connecting nut 203 and the clamping nut 206 form the central hole of the first connecting portion. The connecting nut 203 is threadedly connected to the valve body 201. The locking nut 205 prevents relative rotation between the connecting nut 203 and the valve body 201, thus avoiding affecting the connection effect between them. The connecting nut 203 and the valve body 201 are sealed by a second sealing element 202 to prevent the medium flowing inside the shut-off valve from leaking out through the gap between them. The first limiting step 2031 is disposed on the inner wall of the central hole of the connecting nut 203. A second limiting step 2032 is also disposed on the connecting nut 203. A sealing gasket 207 is disposed between the second limiting step 2032 and the first sealing element 204 to enhance the sealing effect of the gap between the connecting nut 203 and the valve needle body 301. The second connecting part is a clamping nut 206, which is threadedly connected to both the connecting nut 203 and the locking nut 205. The threaded connections of the clamping nut 206 to both the connecting nut 203 and the locking nut 205 are all located within the central hole of the first connecting part.

[0034] In this embodiment, the valve needle assembly 3 is rod-shaped. One end of the valve needle assembly 3 is used to block the pressure tapping hole 2011, and the other end of the valve needle assembly 3 is provided with a handle 303. By providing the handle 303, the operator can easily open and close the shut-off valve.

[0035] In summary, by setting an angle between the axial direction of the connecting hole 501 and the axial direction of the connecting pipe, the medium in the connecting pipe can be prevented from being directly sprayed toward the pressure sensor 6 through the connecting hole 501 when the vortex flow meter is working. This protects the pressure sensor 6 from the impact of the medium in the connecting pipe, extends the service life of the pressure sensor 6, and improves the adaptability of the vortex flow meter to different working scenarios.

[0036] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A vortex flow meter, characterized in that, include: Connecting pipes; A pressure sensor is disposed at the tail end of the connecting pipe; The connecting pipe has a connecting hole that transmits the medium flowing in the connecting pipe to the pressure sensor. There is an angle between the axis of the connecting hole and the axis of the connecting pipe, so that the pressure sensor is located outside the hole direction of the connecting hole.

2. The vortex flow meter according to claim 1, characterized in that: The connecting pipe includes a rectifier section, and the medium in the rectifier section flows to the pressure sensor through the connecting hole. The rectifier section is provided with a rectifier element, which divides the rectifier section into a first part and a second part. The first part is connected to one end of the connecting pipe, and the second part is connected to the other end of the connecting pipe.

3. The vortex flow meter according to claim 2, characterized in that: A first heat dissipation structure is provided on the outer wall of the rectifier section.

4. The vortex flow meter according to claim 3, characterized in that: The first heat dissipation structure includes a heat dissipation protrusion that protrudes radially along the rectifier section. The heat dissipation protrusion is arranged around the axial direction of the rectifier section. A plurality of the first heat dissipation structures are provided on the outer wall of the rectifier section. The first heat dissipation structures are arranged sequentially at intervals along the axial direction of the rectifier section.

5. The vortex flow meter according to claim 2, characterized in that: A second heat dissipation structure is provided on the inner wall of the rectifier section.

6. The vortex flow meter according to claim 5, characterized in that: The second heat dissipation structure includes a heat dissipation groove that is radially recessed along the rectifier section. The heat dissipation groove is arranged around the axial direction of the rectifier section. Multiple second heat dissipation structures are arranged on the inner wall of the rectifier section, and the second heat dissipation structures are arranged sequentially at intervals along the axial direction of the rectifier section.

7. The vortex flow meter according to any one of claims 1-6, characterized in that: The beginning of the connecting pipe is connected to a shut-off valve, and the pressure tapping pipe is connected to the connecting pipe through the shut-off valve.

8. The vortex flow meter according to claim 7, characterized in that: The shut-off valve includes a valve body assembly and a valve needle assembly. The valve body assembly has a through hole for inserting the valve needle assembly. The valve needle assembly is at least partially inserted into the through hole along the bore direction of the through hole, and the valve needle assembly is threadedly connected to the valve body assembly. The valve body assembly has a pressure tapping hole communicating with the pressure tapping tube. The valve needle assembly reciprocates along the bore direction of the through hole. The pressure tapping hole is located on the movement trajectory of the valve needle assembly, and the valve needle assembly is used to block the pressure tapping hole.

9. The vortex flow meter according to claim 8, characterized in that: The valve body assembly includes a valve body body, a first connecting portion, and a second connecting portion. The valve body body, the first connecting portion, and the second connecting portion are connected sequentially along the hole direction of the through hole. The valve needle assembly includes a valve needle body and a valve stem connected sequentially along the hole direction of the through hole. The valve needle body is closer to the pressure tapping hole than the valve stem. The valve stem is at least partially located in the pressure tapping hole corresponding to the second connecting portion, and the valve stem is threadedly connected to the second connecting portion.

10. The vortex flow meter according to claim 9, characterized in that: The valve needle body is fitted with a first sealing element, and a first limiting step is provided on the wall of the through hole corresponding to the first connecting part. The first limiting step is arranged around the axial direction of the through hole. The first connecting part and the second connecting part are threadedly connected, and the second connecting part presses the first sealing element onto the first limiting step.

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