CN214893461U - Cavitation type venturi flow element - Google Patents
Cavitation type venturi flow element Download PDFInfo
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- CN214893461U CN214893461U CN202121090632.3U CN202121090632U CN214893461U CN 214893461 U CN214893461 U CN 214893461U CN 202121090632 U CN202121090632 U CN 202121090632U CN 214893461 U CN214893461 U CN 214893461U
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Abstract
The utility model discloses an air pocket type venturi flow component, including body and two connecting tubes, the inside of body falls into inflow district, cavitation district, value district and cavitation district, one of them connecting tube is located the inflow district, another connecting tube is located the value district, the inflow district passes through cavitation district and cavitation district intercommunication, the value district is located between cavitation district and the cavitation district, cavitation district reduces along the fluid flow direction internal diameter gradually, the cavitation district increases along the fluid flow direction internal diameter gradually, in this air pocket type venturi flow component, can reach flow measurement's function through inflow district and value district when normal operating, cavitation district and cavitation district have been added simultaneously, the function that possesses the restriction maximum discharge under the extreme operating mode of design.
Description
Technical Field
The utility model relates to a venturi technical field, concretely relates to air pocket type venturi flow component.
Background
The venturi tube is a device for measuring the fluid pressure difference, is invented by Italian physicist G.B. venturi, and is named venturi tube. A venturi is a conduit that first constricts and then gradually enlarges. The pressure difference between the inlet section and the minimum section is measured, and the flow rate can be obtained by using Bernoulli's theorem.
When the Venturi tube is used and the flow is measured normally, the pressure at the inlet of the pipeline P1 and the pressure at the outlet P2 are P1 equal to 10.5MPa, t equal to 25 ℃, and Qv equal to 0-140 m3At/h, the pressure loss between P1 and P2 is less than 0.35MPa, but under the specific working condition that the inlet pressure is 8.7MPa and the inlet temperature is 25 ℃, the flow rate is more than or equal to 220m3During the process of flow measurement, the downstream pump connected with the tail end of the pipeline generates cavitation, the safe operation of the downstream pump is seriously influenced, and a common standard Venturi flow element only has the function of flow measurement and does not have the function of limiting the maximum flow.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome foretell not enough, provide an air pocket type venturi flow component, can not only detect the entry flow of pump, can also restrict the maximum flow that gets into the pump simultaneously.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
the cavitation type Venturi tube flow element comprises a tube body and two pressure guide tubes, wherein the inside of the tube body is divided into an inflow area, a cavitation area, a value area and a cavitation area, one pressure guide tube is positioned in the inflow area, the other pressure guide tube is positioned in the value area, the inflow area is communicated with the cavitation area through the cavitation area, the value area is positioned between the cavitation area and the cavitation area, the inner diameter of the cavitation area is gradually reduced along the fluid flowing direction, and the inner diameter of the cavitation area is gradually increased along the fluid flowing direction.
Preferably, the roughness of the inner surface of the pipe body is greater than or equal to 1.6.
Preferably, the pipe inlet bevel angle is 45 ° ± 2 °.
Preferably, the length of the pipe body is 770mm, the length of the inflow area is 114.6mm, and the length of the cavitation area is 507 mm.
Preferably, the minimum internal diameter of the cavitation zone is about 25 mm.
The utility model has the advantages that: in the flow element of the cavitation type Venturi tube, the flow measurement function can be achieved during normal operation through the inflow area and the value taking area, and meanwhile, the cavitation area and the cavitation area are added, so that the cavitation type Venturi tube flow element has the function of limiting the maximum flow under the design extreme working condition.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic view of the structure a-a of fig. 1.
In the figure: 1. the device comprises a pipe body, 2 pressure guide pipes, 1-1 inflow area, 1-2 cavitation area, 1-3 value area and 1-4 cavitation area.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
The cavitation type Venturi tube flow element comprises a tube body 1 and two pressure guide tubes 2, wherein the interior of the tube body 1 is divided into an inflow area 1-1, a cavitation area 1-2, a value area 1-3 and a cavitation area 1-4, one pressure guide tube 2 is located in the inflow area 1-1, the other pressure guide tube 2 is located in the value area 1-3, the inflow area 1-1 is communicated with the cavitation area 1-4 through the cavitation area 1-2, the value area 1-3 is located between the cavitation area 1-2 and the cavitation area 1-4, the inner diameter of the cavitation area 1-2 is gradually reduced along the fluid flowing direction, and the inner diameter of the cavitation area 1-4 is gradually increased along the fluid flowing direction.
Example (b):
as shown in fig. 1 and 2, the roughness of the inner surface of the pipe body 1 is greater than or equal to 1.6, the angle of the inlet bevel of the pipe body 1 is 10 ° ± 2 °, the length of the pipe body 1 is 770mm, the length of the inflow region 1-1 is 114.6mm, the inner diameter of the inflow region 1-1 is 131.78mm, the length of the cavitation region 1-2 is 127.33mm, the inclination of the cavitation region 1-2 is 45 °, the inner diameter of the cavitation region 1-2 is 25mm to 131.78mm, the length of the cavitation region 1-4 is 507mm, and the inner diameter of the cavitation region 1-4 is 25mm to 131.78 mm.
The fluid is measured in an inflow area 1-1, a cavitation area 1-1 and a value area 1-3, and then passes through a cavitation area 1-4, when the fluid flow reaches 220m3During the period of/h, cavitation erosion can be generated in the cavitation erosion areas 1-4, so that disturbance is formed in the cavitation erosion areas, cavitation erosion cannot occur at the downstream pump at the rear end, and the downstream pump at the rear end is protected.
In light of the above, the present invention is not limited to the above embodiments, and various changes and modifications can be made by the worker without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. The utility model provides a cavitation type venturi flow component, includes body and two pressure pipes, its characterized in that: the inner part of the pipe body is divided into an inflow area, a cavitation area, a value area and a cavitation area, wherein one pressure guide pipe is positioned in the inflow area, the other pressure guide pipe is positioned in the value area, the inflow area is communicated with the cavitation area through the cavitation area, the value area is positioned between the cavitation area and the cavitation area, the inner diameter of the cavitation area is gradually reduced along the fluid flowing direction, and the inner diameter of the cavitation area is gradually increased along the fluid flowing direction.
2. The cavitation venturi flow element as recited in claim 1, wherein: the roughness of the inner surface of the pipe body is more than or equal to 1.6.
3. The cavitation venturi flow element as recited in claim 1, wherein: the angle of the pipe body inlet groove is 10 degrees +/-2 degrees.
4. The cavitation venturi flow element as recited in claim 1, wherein: the length of the pipe body is 770mm, the length of the inflow area is 114.6mm, and the length of the cavitation area is 507 mm.
5. The cavitation venturi flow element as recited in claim 1, wherein: the minimum inner diameter of the air pocket area is 25 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121090632.3U CN214893461U (en) | 2021-05-20 | 2021-05-20 | Cavitation type venturi flow element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121090632.3U CN214893461U (en) | 2021-05-20 | 2021-05-20 | Cavitation type venturi flow element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214893461U true CN214893461U (en) | 2021-11-26 |
Family
ID=78945443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121090632.3U Active CN214893461U (en) | 2021-05-20 | 2021-05-20 | Cavitation type venturi flow element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214893461U (en) |
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2021
- 2021-05-20 CN CN202121090632.3U patent/CN214893461U/en active Active
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