CN209945432U - Positive and negative differential pressure flowmeter - Google Patents
Positive and negative differential pressure flowmeter Download PDFInfo
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- CN209945432U CN209945432U CN201921166366.0U CN201921166366U CN209945432U CN 209945432 U CN209945432 U CN 209945432U CN 201921166366 U CN201921166366 U CN 201921166366U CN 209945432 U CN209945432 U CN 209945432U
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Abstract
The utility model discloses a positive negative differential pressure flowmeter, including flowmeter body, nozzle, divergent pipe, vacuum area, positive pressure pipe, negative pressure pipe, differential pressure transmitter and flowmeter entry, characterized by: the body is fixedly connected with the positive pressure pipe, the body is fixedly connected with the negative pressure pipe, and the positive pressure pipe and the negative pressure pipe are connected to the differential pressure transmitter. The present invention relates to the field of flow meter devices, and in particular, to a positive and negative differential pressure flow meter. The utility model discloses a positive negative differential pressure flowmeter, this flowmeter have simple structure, convenient production, with low costs, long service life, easily industrial production, but wide application in various fluidic measurements.
Description
Technical Field
The present invention relates to the field of flow meter devices, and in particular, to a positive and negative differential pressure flow meter.
Background
The differential pressure flow meter used for measuring and controlling the current flow is that a throttling element is arranged in a cavity of the flow meter, the differential pressure value at two ends of the throttling element is in direct proportion to the flow velocity, the flow of the fluid can be calculated by measuring the differential pressure value at two ends of the throttling element, no matter how large the flow velocity change of the fluid is, the pressure at two ends of the throttling element is measured to be larger than the standard atmospheric pressure, namely two measuring tubes of a differential pressure transmitter are used for measuring the positive pressure difference of the fluid, the differential pressure flow meter is also called as a positive differential pressure flow meter, the measuring range of the positive differential pressure flow meter is very small: within 3, when the fluid velocity variation exceeds 1: 3, the positive differential pressure flowmeter has a large error, and when the fluid speed changes by more than 1: and 5, the positive pressure differential pressure flowmeter cannot work normally.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a positive and negative differential pressure flowmeter, this flowmeter have simple structure, convenient production, with low costs, long service life, easily industrial production, but wide application in various fluidic measurements.
The utility model adopts the following technical scheme to realize the purpose of the invention:
the utility model provides a positive negative differential pressure flowmeter, includes flowmeter body, nozzle, divergent pipe, vacuum zone, positive pressure pipe, negative pressure pipe, differential pressure transmitter and flowmeter entry, characterized by: the body is fixedly connected with the positive pressure pipe, the body is fixedly connected with the negative pressure pipe, and the positive pressure pipe and the negative pressure pipe are connected to the differential pressure transmitter.
As a further limitation of this aspect, the large opening of the nozzle faces the flow meter inlet, and the positive pressure pipe is disposed in front of the large opening of the nozzle.
As a further limitation of the technical solution, the diverging pipe is installed behind the nozzle, and the diverging pipe is fixed on the inner wall of the body.
As a further limitation of this aspect, the small opening of the nozzle faces the divergent pipe.
As a further limitation of the present technical solution, the vacuum region is located between the nozzle and the divergent tube, and an opening of the negative pressure tube is disposed in the vacuum region.
As a further limitation of this aspect, the nozzle is mounted within the body.
Compared with the prior art, the utility model discloses an advantage is with positive effect:
(1) the utility model has the advantages of simple structure, strong anti-interference, strong practicability, low cost, high measurement precision and good linearity;
(2) the device has wide measurement range, the flow rate range can reach 10:1 to 12:1, and the measurement precision is high when the flow is small;
(3) the device can be widely used for detecting various gases and liquids in the instrument industry.
The utility model discloses a positive negative differential pressure flowmeter, this flowmeter have simple structure, convenient production, with low costs, long service life, easily industrial production, but wide application in various fluidic measurements.
Drawings
Fig. 1 is a schematic view of a partially cut-open structure of the present invention.
Fig. 2 is a schematic view of a three-dimensional structure of the present invention.
Fig. 3 is a schematic view of a three-dimensional structure of the present invention.
Fig. 4 is a schematic view of a partial three-dimensional structure of the present invention.
Fig. 5 is a schematic diagram of a partial three-dimensional structure of the present invention.
Fig. 6 is a schematic diagram of a partially cut-open structure of the present invention.
In the figure: 1. the device comprises a body, 2, a nozzle, 3, a vacuum area, 4, a divergent pipe, 5, a negative pressure pipe, 6, a positive pressure pipe, 7, a flowmeter inlet, 8 and a differential pressure transmitter.
Detailed Description
In the following, an embodiment of the present invention will be described in detail with reference to the drawings, but it should be understood that the scope of the present invention is not limited by the embodiment.
As shown in fig. 1-6, the utility model discloses a flowmeter body 1, nozzle 2, divergent pipe 4, vacuum zone 3, positive pressure pipe 6, negative pressure pipe 5, differential pressure transmitter 8 and flowmeter entry 7, 1 fixed connection of body positive pressure pipe 6, 1 fixed connection of body negative pressure pipe 5, positive pressure pipe 6 with negative pressure pipe 5 is connected to differential pressure transmitter 8.
The large opening of the nozzle 2 faces the flowmeter inlet 7, and the positive pressure pipe 6 is arranged in front of the large opening of the nozzle 2.
The rear part of the nozzle 2 is provided with the divergent pipe 4, the divergent pipe 4 is fixed on the inner wall of the body 1, and the distance between the nozzle 2 and the divergent pipe 4 is 1cm-2 cm.
The small opening of the nozzle 2 faces the divergent pipe 4.
The vacuum area 3 is arranged between the nozzle 2 and the divergent pipe 4, and the opening of the negative pressure pipe 5 is arranged in the vacuum area 3.
The nozzle 2 is mounted within the body 1.
The inner diameter of the outlet of the nozzle 2 is smaller than that of the inlet of the divergent pipe 4. Differential pressure transmitter 8 can connect differential pressure measuring instrument, and differential pressure measuring instrument is current product, no longer gives unnecessary details.
The utility model discloses the work flow does: when fluid enters the flowmeter body 1 from the flowmeter inlet 7, high-speed fluid is formed at the outlet of the nozzle 2, because the inner diameter of the outlet of the nozzle 2 is smaller than the inner diameter of the inlet of the divergent pipe 4, the high-speed fluid sprayed out of the nozzle 2 is completely sprayed into the divergent pipe 4, when the fluid flows, a vacuum zone 3 is formed at the outlet of the nozzle 2 and the inlet of the divergent pipe 4, the higher the speed of the fluid is, the larger the negative pressure value of the vacuum zone 3 is, the larger the pressure difference between the positive pressure pipe 6 and the negative pressure pipe 5 is, the larger the differential pressure detected by the differential pressure transmitter 8 is, the larger the signal output by the differential pressure transmitter 8 is, and because the speed of the fluid is in direct proportion to the pressure difference between two ends of the nozzle 2, the amplitude of the output signal of the differential pressure transmitter 8.
The above disclosure is only one specific embodiment of the present invention, however, the present invention is not limited thereto, and any changes that can be considered by those skilled in the art should fall within the protection scope of the present invention.
Claims (6)
1. The utility model provides a positive negative differential pressure flowmeter, includes flowmeter body (1), nozzle (2), divergent pipe (4), vacuum zone (3), positive pressure pipe (6), negative pressure pipe (5), differential pressure transmitter (8) and flowmeter entry (7), characterized by: body (1) fixed connection positive pressure pipe (6), body (1) fixed connection negative pressure pipe (5), positive pressure pipe (6) with negative pressure pipe (5) are connected to differential pressure transmitter (8).
2. The positive-negative differential pressure flowmeter of claim 1, wherein: the large opening of the nozzle (2) faces the flowmeter inlet (7), and the positive pressure pipe (6) is arranged in front of the large opening of the nozzle (2).
3. The positive-negative differential pressure flowmeter of claim 2, wherein: the rear part of the nozzle (2) is provided with the divergent pipe (4), and the divergent pipe (4) is fixed on the inner wall of the body (1).
4. The positive-negative differential pressure flow meter according to claim 1 or 3, wherein: the small opening of the nozzle (2) faces the divergent pipe (4).
5. The positive-negative differential pressure flowmeter of claim 1, wherein: the vacuum area (3) is arranged between the nozzle (2) and the divergent pipe (4), and the opening of the negative pressure pipe (5) is arranged in the vacuum area (3).
6. The positive-negative differential pressure flowmeter of claim 3, wherein: the nozzle (2) is mounted in the body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921166366.0U CN209945432U (en) | 2019-07-24 | 2019-07-24 | Positive and negative differential pressure flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921166366.0U CN209945432U (en) | 2019-07-24 | 2019-07-24 | Positive and negative differential pressure flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209945432U true CN209945432U (en) | 2020-01-14 |
Family
ID=69120020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921166366.0U Active CN209945432U (en) | 2019-07-24 | 2019-07-24 | Positive and negative differential pressure flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209945432U (en) |
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2019
- 2019-07-24 CN CN201921166366.0U patent/CN209945432U/en active Active
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