CN209878032U - Flowmeter for multi-point measurement of large-diameter pipeline - Google Patents
Flowmeter for multi-point measurement of large-diameter pipeline Download PDFInfo
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- CN209878032U CN209878032U CN201920544655.3U CN201920544655U CN209878032U CN 209878032 U CN209878032 U CN 209878032U CN 201920544655 U CN201920544655 U CN 201920544655U CN 209878032 U CN209878032 U CN 209878032U
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- pressure
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- measuring
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Abstract
The utility model relates to a flowmeter for large-diameter pipeline multipoint measurement, which comprises a group of pressure taking units, a positive pressure taking pipe and a negative pressure taking pipe which are arranged in parallel at equal intervals, wherein the pressure taking units comprise a positive measuring pipe, a negative measuring pipe and a connecting flange, the positive measuring pipe is evenly provided with a row of first pressure taking holes along the axial direction, the negative measuring pipe is evenly provided with two rows of second pressure taking holes along the axial direction, one end of the positive measuring pipe is communicated with the positive pressure taking pipe, one end of the negative measuring pipe is communicated with the negative pressure taking pipe, when fluid medium passes through the pressure taking holes which are arranged at different positions on the two measuring pipes, pressure change is generated by different flow velocities, each group of pressure taking units is communicated with the pressure taking pipes, and by utilizing multipoint and multi-unit measurement, the average flow velocity in the measuring pipeline can be more comprehensive, and the flow of the fluid in the large-diameter pipeline can be measured by matching with a differential pressure, compared with a common single-point measuring flowmeter, the flowmeter is more accurate and reliable.
Description
Technical Field
The utility model relates to a flow measurement field especially relates to a flowmeter for heavy-calibre pipeline multiple spot is measured.
Background
At present, a large-diameter pipeline used for conveying fluid can often appear in an actual industrial field, because the large-diameter pipeline straight pipe section is very short, the straight pipe section in front of an instrument is difficult to meet standard requirements, the flow field change in the pipeline is large, the flow velocity distribution is uneven, the traditional flowmeter is caused to have large flow measurement errors and cannot meet the requirement of measurement precision, in order to improve the accuracy of flow measurement, the straight pipe section can be prolonged, then the traditional flowmeter is inserted into the straight pipe section to carry out flow measurement, and the large-diameter pipeline can occupy more space in the industrial field. In summary, it is an urgent need to solve the above-mentioned problems to design a high-precision flowmeter for measuring a large-diameter pipeline.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome exist among the prior art not enough, provide a flowmeter for heavy-calibre pipeline multiple spot is measured.
The utility model discloses a realize through following technical scheme:
the utility model provides a flowmeter for heavy-calibre pipeline multiple spot is measured, its characterized in that, a set of pressure cell, positive pressure tube and the negative pressure tube of getting including equidistant parallel arrangement, get the pressure cell and include just surveying buret, negative pressure tube and locate the flange of just surveying buret and negative pressure tube one end, just survey buret and evenly open along the axial and have one row of first pressure hole of getting, negative pressure tube evenly opens along the axial has two rows of second pressure holes of getting, just survey buret one end and positive pressure tube intercommunication, negative pressure tube one end and negative pressure tube intercommunication are got to the negative pressure.
According to the technical scheme, preferably, the pressure measuring units are arranged in 4 groups in parallel at equal intervals.
According to the above technical solution, preferably, the included angle between the two rows of pressure taking holes on the negative measuring pipe is less than 100 °.
According to the technical scheme, preferably, the included angle between the two rows of pressure taking holes on the negative measuring pipe is 84 degrees.
According to the technical scheme, preferably, the positive pressure taking pipe and the negative pressure taking pipe are both provided with a back-blowing interface.
The utility model has the advantages that:
when utilizing fluid medium to go through the pressure taking hole of the different positions division on two survey burets, different velocity of flow produce pressure variation, and every group is got the pressure unit and is all managed the intercommunication with pressure taking, utilizes multiple spot, the multiunit to measure, and average velocity of flow in the measuring tube that can be more comprehensive is through supporting the use with differential pressure transmitter, display instrument or computer, can realize measuring the fluid flow in the heavy-calibre pipeline, compares ordinary single-point measuring's flowmeter, and is more accurate, reliable.
Drawings
Fig. 1 is a schematic front view of a pressure measuring unit in a pipeline.
Fig. 2 is a schematic side view of the pressure tapping unit of the present invention.
Fig. 3 is a schematic top view of the pressure tapping unit of the present invention.
Fig. 4 is a schematic top view of the negative measuring tube of the present invention.
In the figure: 1. the pressure measuring device comprises a negative pressure measuring pipe, 2 positive pressure measuring pipes, 3 connecting flanges, 4 first pressure measuring holes, 5 second pressure measuring holes, 6 positive measuring pipes and 7 negative measuring pipes.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.
As shown in the figure, the utility model comprises a group of pressure taking units, a positive pressure taking pipe 2 and a negative pressure taking pipe 1 which are arranged in parallel at equal intervals, wherein the pressure taking units comprise a positive measuring pipe 6, a negative measuring pipe 7 and a connecting flange 3 arranged at one end of the positive measuring pipe 6 and the negative measuring pipe 7, the positive measuring pipe 6 is axially and uniformly provided with a row of first pressure taking holes 4, the negative measuring pipe 7 is axially and uniformly provided with two rows of second pressure taking holes 5, the first pressure taking holes 4 and the second pressure taking holes 5 are both towards the upstream direction of the fluid flow direction in the pipeline to be measured, the positive measuring pipe 6 is positioned at the lateral rear part of the negative measuring pipe 7 along the fluid flow direction, the positive measuring pipe 6 is prevented from blocking the pressure taking error of the second pressure taking holes 5 on the negative measuring pipe 7, one end of the positive measuring pipe 6 is communicated with the positive pressure taking pipe 2, one end of the negative measuring pipe 7 is communicated with the negative pressure taking pipe 1, one end of the positive measuring pipe 6 and one end, two measuring pipes are inserted into the pipeline to be measured in a penetrating way, and the two measuring pipes are connected with the outer wall of the pipeline to be measured in a sealing way so as to prevent the fluid medium in the pipeline from leaking. When utilizing fluid medium to go through the pressure taking hole of the different positions division on two survey burets, different velocity of flow produce pressure variation, and every group is got the pressure unit and is all managed the intercommunication with pressure taking, utilizes multiple spot, the multiunit to measure, and average velocity of flow in the measuring tube that can be more comprehensive is through supporting the use with differential pressure transmitter, display instrument or computer, can realize measuring the fluid flow in the heavy-calibre pipeline, compares ordinary single-point measuring's flowmeter, and is more accurate, reliable.
According to the embodiment, preferably, the pressure measuring units are arranged in 4 groups in parallel at equal intervals, and the average flow speed in the pipeline can be measured more comprehensively by using multipoint and multi-unit measurement, so that the flow meter is more accurate and reliable compared with a common single-point measurement flow meter.
According to the above embodiment, preferably, the two rows of pressure taking holes on the negative measurement pipe 7 have an included angle of less than 100 °.
According to the above embodiment, preferably, the two rows of pressure taking holes on the negative measurement pipe 7 have an included angle of 84 °.
According to the above embodiment, preferably, the positive pressure taking pipe 2 and the negative pressure taking pipe 1 are both provided with the back flushing interfaces, and when fluid media such as flue gas or coal gas and the like which easily block the pipeline are in the pipeline, the back flushing interfaces are connected with the purging device, so that the problem of flow measurement interruption caused by the blockage of the differential pressure signal pipeline can be effectively prevented.
When utilizing fluid medium to go through the pressure taking hole of the different positions division on two survey burets, different velocity of flow produce pressure variation, and every group is got the pressure unit and is all managed the intercommunication with pressure taking, utilizes multiple spot, the multiunit to measure, and average velocity of flow in the measuring tube that can be more comprehensive is through supporting the use with differential pressure transmitter, display instrument or computer, can realize measuring the fluid flow in the heavy-calibre pipeline, compares ordinary single-point measuring's flowmeter, and is more accurate, reliable.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. The utility model provides a flowmeter for heavy-calibre pipeline multiple spot is measured, its characterized in that, a set of pressure cell, positive pressure tube and the negative pressure tube of getting including equidistant parallel arrangement, get the pressure cell and include just surveying buret, negative pressure tube and locate the flange of just surveying buret and negative pressure tube one end, just survey buret and evenly open along the axial and have one row of first pressure hole of getting, negative pressure tube evenly opens along the axial has two rows of second pressure holes of getting, just survey buret one end and positive pressure tube intercommunication, negative pressure tube one end and negative pressure tube intercommunication are got to the negative pressure.
2. The flowmeter for multipoint measurement of a large-caliber pipeline according to claim 1, wherein the pressure tapping units are arranged in 4 groups in parallel at equal intervals.
3. The flowmeter for multipoint measurement of a large diameter pipe according to claim 1 or 2, wherein the angle between the two rows of pressure taking holes on said negative measuring pipe is less than 100 °.
4. The flowmeter for multipoint measurement of a large diameter pipe according to claim 1 or 2, wherein the angle between the two rows of pressure taking holes on said negative measuring pipe is 84 °.
5. The flowmeter for multipoint measurement of a large-diameter pipeline according to claim 1, wherein each of the positive pressure taking pipe and the negative pressure taking pipe is provided with a back-blowing interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920544655.3U CN209878032U (en) | 2019-04-19 | 2019-04-19 | Flowmeter for multi-point measurement of large-diameter pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920544655.3U CN209878032U (en) | 2019-04-19 | 2019-04-19 | Flowmeter for multi-point measurement of large-diameter pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209878032U true CN209878032U (en) | 2019-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920544655.3U Expired - Fee Related CN209878032U (en) | 2019-04-19 | 2019-04-19 | Flowmeter for multi-point measurement of large-diameter pipeline |
Country Status (1)
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| CN (1) | CN209878032U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111721370A (en) * | 2020-05-19 | 2020-09-29 | 中国石油大学(北京) | Double-nozzle natural gas flow measuring device and system based on differential pressure |
-
2019
- 2019-04-19 CN CN201920544655.3U patent/CN209878032U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111721370A (en) * | 2020-05-19 | 2020-09-29 | 中国石油大学(北京) | Double-nozzle natural gas flow measuring device and system based on differential pressure |
| CN111721370B (en) * | 2020-05-19 | 2022-08-26 | 中国石油大学(北京) | Double-nozzle natural gas flow measuring device and system based on differential pressure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191231 |