CN214407617U

CN214407617U - Cylindrical high-precision micro-flow sensor

Info

Publication number: CN214407617U
Application number: CN202022415771.0U
Authority: CN
Inventors: 张铭哲; 王泽元; 宋震
Original assignee: Shaanxi Yidu Intelligent Technology Co ltd
Current assignee: Shaanxi Yidu Intelligent Technology Co ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-10-15
Anticipated expiration: 2030-10-27

Abstract

The utility model discloses a cylindrical high accuracy micro flow sensor, include: the device comprises a shell, a calculation module and a laminar flow element; the laminar flow element is a cylinder and is arranged in the shell, a first groove, a second groove and a third groove are arranged on the surface of the laminar flow element, disc-shaped baffles are respectively arranged at the front end and the rear end of the laminar flow element, and openings are arranged at the bottoms of the baffles and are embedded on the inner wall of the shell; the calculation module comprises a calculator, a first detection unit, a second detection unit and a third detection unit, wherein the detection end of the first detection unit is connected into the first groove, the data end of the first detection unit is connected with the calculator, the detection end of the second detection unit is connected into the second groove, the data end of the second detection unit is connected with the calculator, the detection end of the third detection unit is connected into the third groove, and the data end of the third detection unit is connected with the calculator. The utility model provides a current laminar flow sensor precision is poor, operating condition requires high technical problem.

Description

Cylindrical high-precision micro-flow sensor

Technical Field

The utility model relates to a flow measurement field, in particular to cylindrical high accuracy micro flow sensor.

Background

Laminar flow sensors are based on the Hagen-Poiseuille Law (Hagen-Poiseuille Law) design, a measurement tool for accurately measuring fluid flow. In the prior art, a laminar flow meter designs flow elements in various modes, and converts a turbulent disorder state of fluid into a laminar flow state, but in actual use, the problems of poor stability and low precision exist to different degrees. Secondly, most laminar flow sensors separate the shell, the laminar flow element and the calculation module, and although the manufacturing difficulty is reduced, the size is overlarge, the integration degree is low, and the large-scale popularization and use are difficult. And some new technologies are applied to the laminar flow meter, but mass production is not always realized, the dispersion of experimental data is increased, and the mass production target is difficult to achieve at a later time. Furthermore, in the prior art, the internal isolation unit of the laminar flow element is not strictly designed according to the requirements of the laminar flow state of the fluid, so that the calculation formula and the laminar flow state are not coordinated, the measurement task cannot be completed under a plurality of working conditions, and the transportability is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a cylindrical high accuracy micro flow sensor solves among the prior art technical problem that laminar flow flowmeter precision is poor, operating condition requires highly.

The utility model adopts the technical proposal that: a cylindrical high-precision micro-flow sensor comprises a shell, a calculation module and a laminar flow element;

the laminar flow element is a cylinder and is arranged in the shell, a first groove, a second groove and a third groove are arranged on the surface of the laminar flow element, disc-shaped baffles are respectively arranged at the front end and the rear end of the laminar flow element, and openings are arranged at the bottoms of the baffles and are embedded on the inner wall of the shell;

the calculation module comprises a calculator, a first detection unit, a second detection unit and a third detection unit, wherein the detection end of the first detection unit is connected into the first groove, the data end of the first detection unit is connected with the calculator, the detection end of the second detection unit is connected into the second groove, the data end of the second detection unit is connected with the calculator, the detection end of the third detection unit is connected into the third groove, and the data end of the third detection unit is connected with the calculator.

Further, the first detection unit comprises a first temperature sensor, a first differential pressure sensor and a first pressure sensor; the second detection unit comprises a second temperature sensor, a second differential pressure sensor and a second pressure sensor; the third detection unit comprises a third temperature sensor, a third differential pressure sensor and a third pressure sensor.

Furthermore, the gap is rectangular.

Furthermore, the vertical cross sections of the first groove, the second groove and the third groove are arc-shaped.

Furthermore, the radian of the first groove, the radian of the second groove and the radian of the third groove are all 10 degrees.

Adopt as above technical scheme provides a cylindrical high accuracy micro flow sensor compares with prior art, beneficial effect lies in:

the cylindrical design enables the laminar flow sensor to be easier to install and saves space; the multi-channel detection mode enables the laminar flow sensor to have universality and improves the detection precision.

Drawings

FIG. 1 is a schematic cross-sectional view of a cylindrical high-precision micro-flow sensor;

fig. 2 is a schematic view of the baffle 5;

fig. 3 is a schematic sectional view of the laminar flow member 3;

fig. 4 is a schematic perspective view of the laminar flow member 3.

Detailed Description

As shown in fig. 1 to 4, a cylindrical high-precision micro-flow sensor comprises a housing 1, a calculation module 2, a laminar flow element 3;

the laminar flow element 3 is a cylinder and is arranged inside the shell 1, a first groove 6, a second groove 7 and a third groove 8 are arranged on the surface of the laminar flow element 3, disc-shaped baffles 4 are respectively arranged at the front end and the rear end of the laminar flow element 3, and openings 5 are arranged at the bottoms of the baffles 4 and are embedded on the inner wall of the shell 1;

the calculation module 2 comprises a calculator 9, a first detection unit, a second detection unit and a third detection unit, wherein the first detection unit is connected with the first groove 6, a data end is connected with the calculator 9, the detection end of the second detection unit is connected with the second groove 7, the data end is connected with the calculator 9, the detection end of the third detection unit is connected with the third groove 8, and the data end is connected with the calculator 9.

When the fluid detection device works, fluid to be detected enters from the notch 5 at the baffle 4 and flows through the first groove 6, the second groove 7 and the third groove 8 simultaneously, the detection ends of the first detection unit, the second detection unit and the third detection unit are arranged in the corresponding grooves to obtain the detection value of the fluid to be detected, the detection value is transmitted to the calculator 9 through the data end, and the calculator 9 calculates the result through a built-in program.

As described above, each detection unit includes a set of sensor system, it should be noted that the parameters that different fluids to be detected need to obtain are substantially the same, but in order to obtain a more accurate detection result, a new sensor may be added inside different detection units, and if the new sensor is implemented only by the prior art, it does not constitute a new technical solution, and the present invention is also within the protection scope of the present invention.

Furthermore, the gap 5 is rectangular.

Further, the vertical cross sections of the first groove 6, the second groove 7 and the third groove 8 are arc-shaped. It should be noted that the cross-sectional pattern of the groove is limited by the machining tool and is not a regular rectangle during the specific machining process. The rectangular shape is similar to a rectangular shape in appearance, and the first concave groove 6, the second concave groove 7, and the third concave groove 8 are arc-shaped grooves to some extent.

Further, the widths of the first groove 6, the second groove 7 and the third groove 8 are all 10 degrees.

It can be seen from the above scheme that all grooves can acquire one set of data, and in a simple aspect, each set of data can acquire one measured value, and then the 3 measured values are subjected to data processing to acquire a more accurate value, such as an average value. Alternatively, the raw data acquired inside each groove is processed, and the processed data is used as a basis for obtaining the measurement values. In a laboratory, the two modes have different accuracy reflection when aiming at different fluids to be measured, that is, different modes can be selected aiming at different fluids to be measured so as to meet the requirement of more rigorous accuracy. Therefore, according to this technical scheme carry out simple data calculation to single fluid that awaits measuring, be equally within the scope of the utility model. Furthermore, the first groove 6, the second groove 7 and the third groove 8 are three grooves in number, so that the number of simply increased grooves and the number of simply measured devices are within the protection scope of the present invention, and the like, and the number of simply reduced grooves and the number of simply measured devices are also within the protection scope of the present invention, for example, only one groove and one measured device are present.

Furthermore, the utility model discloses still include another kind of technical scheme. As can be seen from the above description, one measurement can be taken for each groove. For this purpose, a shut-off valve can be added to each recess in order to specifically measure three different operating conditions. For example, a first groove is used to measure gaseous fluid, a second groove is used to measure liquid fluid, and a third groove is used to measure mixed fluid. When different fluids are measured, the same sensor can be respectively adapted to three different working conditions by matching with the corresponding stop valve to open or close.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A cylindrical high-precision micro-flow sensor is characterized by comprising a shell (1), a calculation module (2) and a laminar flow element (3);

the laminar flow element (3) is a cylinder and is arranged inside the shell (1), a first groove (6), a second groove (7) and a third groove (8) are formed in the surface of the laminar flow element (3), baffles (4) are respectively arranged at the front end and the rear end of the laminar flow element (3), and gaps (5) are formed in the bottoms of the baffles (4) and are embedded in the inner wall of the shell (1);

calculation module (2) is including calculator (9) and first detecting element, second detecting element, third detecting element, the sense terminal of first detecting element inserts first recess (6), the data terminal with calculator (9) are connected, the sense terminal of second detecting element inserts second recess (7), the data terminal with calculator (9) are connected, the sense terminal of third detecting element inserts third recess (8), the data terminal with calculator (9) are connected.

2. The cylindrical high-precision micro-flow sensor according to claim 1, wherein the first detection unit includes a first temperature sensor, a first differential pressure sensor, a first pressure sensor; the second detection unit comprises a second temperature sensor, a second differential pressure sensor and a second pressure sensor; the third detection unit comprises a third temperature sensor, a third differential pressure sensor and a third pressure sensor.

3. A cylindrical high-precision micro-flow sensor according to claim 2, wherein the gap (5) is rectangular.

4. A cylindrical high-precision micro-flow sensor according to claim 3, wherein the vertical cross-section of the first groove (6), the second groove (7) and the third groove (8) is circular arc-shaped.

5. A cylindrical high accuracy micro flow sensor according to claim 1 or 2 or 3 or 4 wherein the first (6), second (7) and third (8) grooves are curved by 10 degrees.