CN219064591U - Novel plug-in differential pressure flow measurement device - Google Patents
Novel plug-in differential pressure flow measurement device Download PDFInfo
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- CN219064591U CN219064591U CN202223488349.3U CN202223488349U CN219064591U CN 219064591 U CN219064591 U CN 219064591U CN 202223488349 U CN202223488349 U CN 202223488349U CN 219064591 U CN219064591 U CN 219064591U
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Abstract
The utility model discloses a novel plug-in differential pressure flow measuring device, which belongs to the technical field of industrial automation meters, and adopts the technical scheme that the novel plug-in differential pressure flow measuring device comprises a flow pipeline and a flow measuring assembly arranged in the flow pipeline, wherein the flow measuring assembly comprises an inserting rod fixedly arranged in the flow pipeline, a supporting rod fixedly arranged at the connecting position of the inserting rod and the flow pipeline and a flow calculating unit assembly arranged on the supporting rod; the two sides of the insertion rod in the flow direction are respectively provided with a pressure sensing diaphragm, and the pressure sensing diaphragms are electrically connected with the flow calculation unit assembly; the utility model provides a novel plug-in differential pressure flow measuring device, which improves the measuring sensitivity of a sensor so as to measure micro differential pressure, enlarges the measuring range and solves the blocking problem of pressure taking holes, positive and negative pressure chambers and pressure guiding pipelines of the differential pressure sensor.
Description
Technical Field
The utility model belongs to the technical field of industrial automation meters, and particularly relates to a novel plug-in differential pressure flow measuring device.
Background
The plug-in differential pressure flowmeter widely used at present consists of a differential pressure sensor and a differential pressure transmitter. The flow sensor divides the insertion rod into positive and negative pressure chambers, and then opens pressure-taking holes on the positive and negative pressure chambers respectively, so that flow medium enters the positive and negative pressure chambers to be transmitted to an external pressure-guiding pipeline through the pressure-taking holes and then to the differential pressure transmitter. From the differential pressure readings, the flow rate is calculated based on the differential pressure as a function of flow rate (Bernoulli equation). (with a multivariable transmitter, temperature and pressure compensation can be performed). The technical scheme is that a pressure taking small hole, a positive pressure chamber, a negative pressure chamber and a pressure guiding pipeline are filled with measuring media, and differential pressure signals are transmitted through the measuring media.
However, the above-described plug-in differential pressure flowmeter has the following problems:
1. the aperture of the differential pressure sensor may be blocked; some fluid media contain a large amount of impurities, such as a large amount of tar and other viscous substances in coke oven gas, and smoke contains a large amount of dust, and the smoke can enter small holes, positive and negative pressure guide pipelines of a differential pressure sensor to cause blockage of pressure taking small holes, pressure chambers and even the pressure guide pipelines, so that the differential pressure sensor is not smooth and cannot normally measure.
2. In the transmission process, signals are lost, and tiny signals cannot be effectively transmitted. The density of the gas medium such as hydrogen and coke oven gas is small, and the generated differential pressure is small; when other gases are operated at low flow rates, the differential pressure is small. Because the gas is compressible, the transmitted differential pressure signal is insensitive and lossy, which can lead to increased measurement errors and some cannot be measured.
Disclosure of Invention
The utility model aims to provide a novel plug-in differential pressure flow measurement device, which is characterized in that a flow measurement assembly is arranged in a flow pipeline, an insertion rod in the flow measurement assembly is arranged in the flow pipeline, and flow detection is carried out through a pressure sensing diaphragm on the insertion rod, so that the measurement sensitivity of a sensor is improved, the micro differential pressure is measured, the measurement range is enlarged, and the problems of blockage of a pressure taking small hole, a positive pressure chamber, a negative pressure chamber and a pressure guiding pipeline of the differential pressure sensor are solved.
The utility model aims at realizing the purposes, comprising a flow pipeline and a flow measurement assembly arranged in the flow pipeline, wherein the flow measurement assembly comprises an insertion rod fixedly arranged in the flow pipeline, a support rod fixedly arranged at the connection position of the insertion rod and the flow pipeline and a flow calculation unit assembly arranged on the support rod; the two sides of the insertion rod in the flow direction are respectively provided with a pressure sensing diaphragm, and the pressure sensing diaphragms are electrically connected with the flow calculation unit component.
Further, the insertion rod is fixedly arranged in the diameter direction of the flow pipeline.
Further, the support rod is fixedly sleeved with an installation fixing unit, and the bottom of the installation fixing unit is fixedly arranged with the outer wall of the flow pipeline.
Further, the insertion rod is arranged through the flow pipeline, and the outer wall of the insertion rod is in sealing connection with the flow pipeline.
Further, two pressure sensing diaphragms on opposite sides of the insertion rod are one measuring unit.
Further, a plurality of measuring units are distributed on the side wall of the insertion rod in the length direction according to a proportion.
Further, the pressure sensing diaphragm is electrically connected with the flow calculation unit assembly through a thin film wire.
Further, the thin film wire is arranged inside the insertion rod or attached to the outer wall of the insertion rod.
The beneficial effects of the utility model are as follows:
1. according to the utility model, the flow measuring assembly is arranged in the flow pipeline, the insertion rod in the flow measuring assembly is arranged in the flow pipeline, the pressure in the flow pipeline is detected, and further, the pressure sensing diaphragm is arranged on the side wall of the insertion rod and detects the pressure of fluid in the flow pipeline, so that the pressure sensing diaphragm generates a certain current under the action of the flow pressure, the current represents the fluid pressure, the pressure of different parts of the differential pressure generating unit is different, the current generated by the sensing diaphragm is different, the existing differential pressure is transmitted to the flow calculating unit for data analysis, and the fluid medium in the pipeline is not conducted through the pressure sampling small hole, the positive pressure chamber and the pressure guiding pipeline of the differential pressure, so that the blocking prevention function is thoroughly realized.
2. According to the utility model, the insertion rod is fixedly arranged in the diameter direction of the flow pipeline, so that the accurate detection of the fluid pressure in the flow pipeline is realized, and meanwhile, the pressure sensing diaphragms are uniformly distributed on the surface of the insertion rod, so that the insertion rod has a plurality of uniform pressure detection points, and the accuracy of the pressure detection is improved.
3. According to the utility model, the installation fixing unit is fixedly arranged on the outer wall of the flow pipeline, and the installation fixing unit is used for fixedly sleeving the supporting rod, so that the stability of the installation of the supporting rod on the flow pipeline is enhanced.
4. In the utility model, two pressure sensing diaphragms on two opposite sides of the insertion rod are taken as one measuring unit, and 4 measuring units are uniformly distributed in the length direction of the insertion rod, so that the pressure detection is carried out in the flow direction of the flow pipeline, and two oppositely arranged pressure sensing diaphragm groups enable the flow in a drainage or water inflow mode in the flow pipeline to be effectively detected.
5. In the utility model, the pressure sensing diaphragm and the flow calculating unit component are electrically connected through the thin film wire, the flow calculating unit is conducted through the thin film wire for the current signal generated by the sensing diaphragm, and meanwhile, the constant voltage provided by the flow calculating unit is conducted, according to the current signal conducted by the thin film wire, the flow data is converted according to the corresponding functional relation (Bernoulli equation) of the differential pressure and the flow, so that the flow measurement is realized, the volume flow output and the mass flow output can be realized, and the temperature and the pressure compensation can be realized.
6. In the utility model, the pressure taking small hole and the positive and negative pressure chambers are eliminated. The plug-in differential pressure flow sensor solves the blocking problem of the pressure taking small hole, the positive and negative pressure chambers and the pressure guiding pipeline of the conventional plug-in differential pressure flow sensor, and has the advantages of simple structure and lower manufacturing cost due to the fact that the positive and negative pressure chambers are canceled, and the strength of the plug-in rod is increased.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic cross-sectional view of an inserted differential pressure flow measuring device according to the present utility model;
FIG. 2 is a schematic cross-sectional view of an inserted differential pressure flow measurement device of the present utility model.
In the drawings, a 1-flow pipeline, a 2-flow measuring assembly, a 3-insertion rod, a 4-support rod, a 5-flow calculating unit assembly, a 6-pressure sensing diaphragm and a 7-installation fixing unit.
Detailed Description
Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.
The novel plug-in differential pressure flow measurement device comprises a flow pipeline 1 and a flow measurement assembly 2 arranged in the flow pipeline 1, wherein the flow measurement assembly 2 comprises an insertion rod 3 fixedly arranged in the flow pipeline 1, a support rod 4 fixedly arranged at the connection position of the insertion rod 3 and the flow pipeline 1 and a flow calculation unit assembly 5 arranged on the support rod 4; the two sides of the insertion rod 3 in the flow direction are respectively provided with a pressure sensing diaphragm 6, and the pressure sensing diaphragms 6 are electrically connected with the flow calculation unit assembly 5.
The flow in the flow pipe 1 is detected by arranging the flow measuring assembly 2 in the flow pipe 1 and placing the insert rod 3 in the flow measuring assembly 2 in the flow pipe 1, and further, the pressure sensing diaphragm 6 detects the pressure of the fluid in the flow pipe 1 by arranging the pressure sensing diaphragm 6 on the side wall of the insert rod 3.
More specifically, since the pressure sensing diaphragms 6 are respectively provided on both sides of the insertion rod 3 in the flow direction, the pressure difference is detected by the pressure sensing diaphragms 6 on both opposite sides of the insertion rod 3, and pressure measurement is achieved.
It can be understood that under the measurement based on two opposite pressure sensing diaphragms 6, a certain current is generated, the current represents the fluid pressure, the pressure of different parts of the differential pressure generating unit is different, the current generated by the sensing diaphragms is different, the existing differential pressure is transmitted to the flow calculating unit for data analysis, and the differential pressure is not conducted through the pressure sampling small hole, the positive pressure chamber and the negative pressure chamber of the differential pressure sensor due to the fact that the fluid medium in the pipeline is not transmitted through the differential pressure sensor, so that the blocking problem is avoided, and the blocking prevention function is thoroughly realized.
Preferably, the insertion rod 3 is fixedly arranged in the diameter direction of the flow tube 1.
The insertion rod 3 is fixedly arranged in the diameter direction of the flow pipeline 1, so that accurate detection of the fluid pressure inside the flow pipeline 1 is realized, and meanwhile, the pressure sensing diaphragms 6 are uniformly distributed on the surface of the insertion rod 3, so that the insertion rod 3 is provided with a plurality of uniform pressure detection points, and the accuracy of the pressure detection is improved.
Preferably, the support rod 4 is fixedly sleeved with a mounting and fixing unit 7, and the bottom of the mounting and fixing unit 7 is fixedly arranged with the outer wall of the flow pipeline 1.
The installation fixing unit 7 is fixedly arranged on the outer wall of the flow pipeline 1, and the installation fixing unit 7 is used for fixedly sleeving the supporting rod 4, so that the stability of the installation of the supporting rod 4 on the flow pipeline 1 is enhanced.
Preferably, the insertion rod 3 is disposed through the flow pipe 1, and the outer wall of the insertion rod 3 is in sealing connection with the flow pipe 1.
Preferably, two pressure sensing diaphragms on two opposite sides of the insertion rod are one measuring unit, and 4 measuring units are uniformly distributed in the length direction of the insertion rod 3.
The two groups of pressure sensing diaphragms 6 are arranged in the flow direction of the flow pipeline 1, the two groups of pressure sensing diaphragms 6 are oppositely arranged on the side wall of the insertion rod 3, so that the pressure detection is carried out in the flow direction of the flow pipeline 1, and the two oppositely arranged groups of pressure sensing diaphragms 6 enable the flow in the flow pipeline 1 in a water draining or water inlet mode to be effectively detected.
Preferably, a plurality of measuring units are distributed on the side wall of the insertion rod in the length direction according to a proportion. It will be appreciated that a plurality of said measuring units may be equally distributed over the insertion rod 3 or may be distributed in a certain proportion.
Preferably, the pressure sensing diaphragm 6 is electrically connected to the flow rate calculation unit assembly 5 through a thin film wire.
Preferably, the thin film wire is disposed inside the insertion rod 3 or attached to the outer wall of the insertion rod 3.
The pressure sensing diaphragm 6 and the flow calculating unit component 5 are electrically connected through the thin film wire, the flow calculating unit is conducted through the thin film wire for the current signal generated by the sensing diaphragm, constant voltage provided by the flow calculating unit is conducted at the same time, and according to the current signal conducted by the thin film wire, flow data are converted according to the corresponding function relation (Bernoulli equation) of differential pressure and flow, so that flow measurement is realized, volume flow output and mass flow output can be realized, and temperature and pressure compensation can be realized.
The working principle and the working process of the utility model are as follows:
according to the utility model, the flow measuring assembly 2 is arranged in the flow pipeline 1, the insertion rod 3 in the flow measuring assembly 2 is arranged in the flow pipeline 1, the pressure in the flow pipeline 1 is detected, and further, the pressure sensing diaphragm 6 is arranged on the side wall of the insertion rod 3, and the pressure sensing diaphragm 6 detects the pressure of fluid in the flow pipeline 1, so that the pressure sensing diaphragm 6 generates a certain current under the action of the flow pressure, the current is representative of the pressure of the fluid, the pressure of different parts of the differential pressure generating unit is different, the current generated by the sensing diaphragm is different, the existing differential pressure is transmitted to the flow calculating unit through the current for data analysis, and the blocking prevention function is thoroughly realized because the fluid medium in the pipeline does not conduct the differential pressure through the pressure sampling small hole, the positive pressure chamber and the pressure guiding pipeline of the differential pressure.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.
Claims (8)
1. The novel plug-in differential pressure flow measurement device comprises a flow pipeline (1) and a flow measurement assembly (2) arranged in the flow pipeline (1), and is characterized in that the flow measurement assembly (2) comprises an insertion rod (3) fixedly arranged in the flow pipeline (1), a support rod (4) fixedly arranged at the connection position of the insertion rod (3) and the flow pipeline (1) and a flow calculation unit assembly (5) arranged on the support rod (4); the two sides of the insertion rod (3) in the flow direction are respectively provided with a pressure sensing diaphragm (6), and the pressure sensing diaphragms (6) are electrically connected with the flow calculation unit assembly (5).
2. The novel plug-in differential pressure flow measuring device according to claim 1, characterized in that the plug-in rod (3) is fixedly arranged in the diameter direction of the flow pipe (1).
3. The novel plug-in differential pressure flow measuring device according to claim 2, wherein the supporting rod (4) is fixedly sleeved with a mounting and fixing unit (7), and the bottom of the mounting and fixing unit (7) is fixedly arranged with the outer wall of the flow pipeline (1).
4. The novel plug-in differential pressure flow measurement device according to claim 1, wherein the plug-in rod (3) is arranged through the flow pipeline (1), and the outer wall of the plug-in rod (3) is in sealing connection with the flow pipeline (1).
5. A novel plug-in differential pressure flow measuring device according to claim 2, characterized in that the two pressure sensing diaphragms (6) on opposite sides of the plug-in rod (3) are one measuring unit.
6. The novel plug-in differential pressure flow measuring device according to claim 5, wherein a plurality of measuring units are arranged on the side wall of the plug-in rod in the length direction in a proportional distribution.
7. A novel plug-in differential pressure flow measurement device according to any of claims 1-6, characterized in that the pressure sensing diaphragm (6) is electrically connected to the flow calculation unit assembly (5) by means of thin film wires.
8. The novel plug-in differential pressure flow measuring device according to claim 1, wherein the thin film wire is arranged inside the plug-in rod (3) or attached to the outer wall of the plug-in rod (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223488349.3U CN219064591U (en) | 2022-12-27 | 2022-12-27 | Novel plug-in differential pressure flow measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223488349.3U CN219064591U (en) | 2022-12-27 | 2022-12-27 | Novel plug-in differential pressure flow measurement device |
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| Publication Number | Publication Date |
|---|---|
| CN219064591U true CN219064591U (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223488349.3U Active CN219064591U (en) | 2022-12-27 | 2022-12-27 | Novel plug-in differential pressure flow measurement device |
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| CN (1) | CN219064591U (en) |
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- 2022-12-27 CN CN202223488349.3U patent/CN219064591U/en active Active
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