CN220602603U - Flow measuring device for medium pipeline - Google Patents
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Abstract
The disclosure relates to a flow measurement device of a medium pipeline, comprising a first flow detection component and a second flow detection component, wherein the first flow detection component and the second flow detection component are both used for being connected with the same medium pipeline, the first flow detection component is used for detecting the flow of flowing medium at a first measurement point of the medium pipeline, the second flow detection component is used for detecting the flow of flowing medium at a second measurement point of the medium pipeline, the first flow detection component is provided with a first detection range, the second flow detection component is provided with a second detection range, and the first detection range is partially overlapped with the second detection range. The setting can realize detecting the different flow sizes of steam flow, realize full-range detection, be favorable to realizing the control to steam use.
Description
Technical Field
The disclosure relates to the technical field of medium pipeline flow measurement, in particular to a flow measurement device of a medium pipeline.
Background
The steam flow meter is arranged on the steam pipeline to track the steam demand and the steam flow change trend, so that the peak use time of the steam can be determined, and the control of the use of the steam is facilitated, and the energy utilization rate is improved.
In the related art, a single steam flowmeter is only arranged on a steam pipeline to detect the steam flow, but because the steam flow is influenced by ambient weather temperature, the variation difference of the steam flow is large, the single steam flowmeter cannot realize the full-range continuous and accurate measurement of the steam flow, so that the measured flow data is inaccurate, and the control of the steam use is not facilitated.
Disclosure of Invention
The disclosure aims to provide a flow measuring device of a medium pipeline, so as to solve the technical problems in the related art.
In order to achieve the above object, the present disclosure provides a flow measurement device of a medium pipe, including a first flow detection part and a second flow detection part;
the first flow detection component and the second flow detection component are both used for being connected with the same medium pipeline, the first flow detection component is used for detecting the flow rate of the flowing medium at a first measuring point of the medium pipeline, and the second flow detection component is used for detecting the flow rate of the flowing medium at a second measuring point of the medium pipeline;
the first flow detection component is provided with a first detection range, the second flow detection component is provided with a second detection range, and the first detection range is partially overlapped with the second detection range.
Optionally, the first flow detection component comprises a first throttling device and two first pressure taking pipes, and the second flow detection component comprises a second throttling device and two second pressure taking pipes;
the first throttling device is arranged in the medium pipeline and is positioned on a first measuring point of the medium pipeline, and first ends of the two first pressure taking pipes are respectively positioned at two sides of the first throttling device and are connected with the medium pipeline so as to be used for acquiring pressure differences formed by flowing medium at two sides of the second throttling device when the flowing medium passes through the first throttling device;
the second throttling device is arranged in the medium pipeline and is positioned on a second measuring point of the medium pipeline, and the first ends of the two second pressure taking pipes are respectively positioned at two sides of the second throttling device and are connected with the medium pipeline, so that when flowing medium passes through the second throttling device, the pressure difference formed by the flowing medium at two sides of the second throttling device can be obtained.
Optionally, the first throttling device and the second throttling device are each configured as a throttling nozzle, the throttling nozzle is provided with a throttling hole, the pore diameter of the throttling hole gradually decreases along a first direction, so that the throttling nozzle is provided with a large-diameter end and a small-diameter end, and the first direction is set as the flow direction of flowing medium in the medium pipeline;
wherein the ratio of the aperture of the small diameter end of the first throttling device to the diameter of the medium pipeline is smaller than the ratio of the aperture of the small diameter end of the second throttling device to the diameter of the medium pipeline.
Optionally, the first throttling device and the second throttling device are arranged at intervals along the first direction, and when the ratio of the aperture of the small diameter end of the first throttling device to the diameter of the medium pipeline is smaller than or equal to 0.4, the linear distance between the first throttling device and the second throttling device is larger than or equal to 12 times of the diameter of the medium pipeline.
Optionally, the two first pressure taking pipes and the two second pressure taking pipes are provided with switch valves.
Optionally, the first detection range includes a first end value and a second end value, the second detection range includes a third end value and a fourth end value, the first end value is smaller than the second end value, and the third end value is smaller than the fourth end value;
wherein the fourth end value is greater than the first end value and less than the second end value, the first end value being greater than the third end value.
Optionally, the first detection range is 0t/h-40t/h, and the detection precision of the first flow detection component is +/-1%;
the second detection range is 30t/h-100t/h, and the detection precision of the second flow detection component is +/-1%.
Optionally, the flow measurement device further comprises a PLC controller;
the first flow detection component is electrically connected with the PLC;
the second flow detection component is electrically connected with the PLC;
the PLC is used for switching the first flow detection component and/or the second flow detection component to measure the flow of the flowing medium in the medium pipeline.
Optionally, the flow measurement device further comprises a first differential pressure transmitter and a second differential pressure transmitter;
the input end of the first differential pressure transmitter is connected with the first flow detection component, the output end of the first differential pressure transmitter is electrically connected with the PLC, and the first differential pressure transmitter is used for detecting a differential pressure signal of a first measuring point of the medium pipeline and transmitting the differential pressure signal to the PLC;
the input end of the second differential pressure transmitter is connected with the second end of the second flow detection component, the output end of the second differential pressure transmitter is electrically connected with the PLC, and the second differential pressure transmitter is used for detecting a differential pressure signal of a second measuring point of the medium pipeline and transmitting the differential pressure signal to the PLC.
Optionally, the medium pipeline is a DN10-DN1000 pipeline, and the wall thickness of the medium pipeline is 3mm-10mm.
According to the technical scheme, the first detection range of the first flow detection component and the second detection range of the second flow detection component are different but partially overlapped, so that the first flow detection component and the second flow detection component are connected to the same medium pipeline, the first flow detection component and the second flow detection component can detect the flow of the flowing medium in the same medium pipeline at the same time, namely, when the flow of the flowing medium in the medium pipeline is in the range of the first detection range, the flow of the flowing medium can be detected through the first flow detection component, when the flow of the flowing medium in the medium pipeline is changed into the range of the second detection range, the flow of the flowing medium can be detected through the second flow detection component, the detection of different flow sizes of the steam flow can be realized, the full range detection is realized, and the control of the steam use is facilitated. In addition, when the flow rate of the flowing medium in the medium pipeline changes to the range of the coincidence of the first detection range and the second detection range, the first flow rate detection component and the second flow rate detection component can both detect the flow rate of the flowing medium, and the first flow rate detection component or the second flow rate detection component which can be switched to the corresponding detection range according to the change of the flow rate of the flowing medium is arranged in such a way, so that continuous and effective measurement of the flowing medium can be realized, the detection accuracy can be improved, and the detection error caused by range switching can be avoided.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
fig. 1 is a schematic structural view of a flow measurement device of a medium pipe of the present disclosure.
Description of the reference numerals
10-a first flow detection component; 11-a first throttle device; 12-a first pressure taking pipe; 20-a second flow rate detection section; 21-a second throttling means; 22-a second pressure taking tube; 30-medium conduit; 40-orifice; 50-switching a valve; a 60-PLC controller; 70-a first differential pressure transmitter; 80-a second differential pressure transmitter.
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
In the description of the present disclosure, it should be understood that the terms "upper", "lower", etc. indicate orientations or positional relationships are defined based on the orientation of the drawing shown in fig. 1, only for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, and a specific orientation configuration and operation, and thus should not be construed as limiting the present disclosure, and furthermore, the terms "inner and outer" refer to the inside and outside of the corresponding structural profile. In addition, the terms "first," "second," etc. are merely intended to distinguish one element from another element, and are not sequential or important.
In the description of the present disclosure, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "mounted" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.
As shown in fig. 1, the present disclosure provides a flow measurement device for a medium pipe, including a first flow detection part 10 and a second flow detection part 20, where the first flow detection part 10 and the second flow detection part 20 are both used for being connected to the same medium pipe 30, the first flow detection part 10 is used for detecting a flow rate of a flowing medium at a first measurement point of the medium pipe 30, the second flow detection part 20 is used for detecting a flow rate of a flowing medium at a second measurement point of the medium pipe 30, and the first flow detection part 10 has a first detection range, and the second flow detection part 20 has a second detection range, where the first detection range and the second detection range partially overlap.
Through the above technical solution, since the first detection range of the first flow detection unit 10 and the second detection range of the second flow detection unit 20 are different but partially overlap, the first flow detection unit 10 and the second flow detection unit 20 are connected to the same medium pipe 30, so that the first flow detection unit 10 and the second flow detection unit 20 can detect the flow of the flowing medium in the same medium pipe 30 at the same time, that is, when the flow of the flowing medium in the medium pipe 30 is within the range of the first detection range, the flow of the flowing medium can be detected by the first flow detection unit 10, and when the flow of the flowing medium in the medium pipe 30 is changed into the range of the second detection range, the flow of the flowing medium can be detected by the second flow detection unit 20, so that the different flow sizes of the steam flow can be detected, the full range detection can be realized, and the control of the steam usage can be facilitated. In addition, when the flow rate of the flowing medium in the medium pipe 30 changes to the range where the first detection range and the second detection range overlap, the first flow rate detecting part 10 and the second flow rate detecting part 20 can both detect the flow rate of the flowing medium, so that the first flow rate detecting part 10 or the second flow rate detecting part 20 which can be switched to the corresponding detection range according to the change of the flow rate of the flowing medium is arranged, thereby realizing continuous and effective measurement of the flowing medium, improving the detection accuracy and avoiding the detection error caused by range switching.
Alternatively, the flowing medium may be steam.
The direction indicated by the arrow in fig. 1 may be the direction in which the flowing medium flows.
Since there is a certain functional relationship between the flow rate and the differential pressure, the flow rate value can be calculated according to the formula by the measured differential pressure, in one embodiment of the disclosure, as shown in fig. 1, the first flow detecting component 10 includes a first throttling device 11 and two first pressure taking pipes 12, the second flow detecting component 20 includes a second throttling device 21 and two second pressure taking pipes 22, the first throttling device 11 is disposed in the medium pipe 30 and is located at a first measurement point of the medium pipe 30, first ends of the two first pressure taking pipes 12 are respectively located at two sides of the first throttling device 11 and are connected with the medium pipe 30, so as to be used for obtaining the differential pressure formed by the flowing medium at two sides of the second throttling device 21 when the flowing medium passes through the first throttling device 11, the second throttling device 21 is disposed in the medium pipe 30 and is located at a second measurement point of the medium pipe 30, and first ends of the two second pressure taking pipes 22 are respectively located at two sides of the second throttling device 21 and are connected with the medium pipe 30, so as to be used for obtaining the differential pressure formed by the flowing medium at two sides of the second throttling device 21 when the flowing medium passes through the second throttling device 21.
Wherein the first throttling device 11 and the second throttling device 21 are used for changing the instantaneous flow when the flowing medium in the medium pipeline 30 flows through the first throttling device 11 and the second throttling device 21 so as to form a pressure difference to realize flow detection. The specific principle is that the flow area is reduced, and the flowing medium forms local contraction at the first throttling device 11 and the second throttling device 21, so that the instantaneous flow of the flowing medium is increased, namely the kinetic energy is increased, the static pressure is reduced, and therefore, the flowing medium generates pressure difference before and after the first throttling device 11 and the second throttling device 21.
At the same time, the cooperation of the first throttling device 11 and the second throttling device 21 makes the instantaneous flow rate of the flowing medium flowing through the first throttling device 11 greater than the instantaneous flow rate of the flowing medium flowing through the second throttling device 21, so that when the flow rate of the flowing medium is smaller, a larger pressure difference can still be generated under the action of the first throttling device 11, and the detection precision is improved.
It will be appreciated that since the pressure differential is proportional to the flow rate, i.e., the greater the flow rate, the greater the pressure differential. Therefore, when the flow rate of the flowing medium is low, the differential pressure obtained by the two first pressure-taking pipes 12 on both sides of the first throttling device 11 is more remarkable than the differential pressure obtained by the two second pressure-taking pipes 22 on both sides of the second throttling device 21, and at this time, the flow rate value calculated by measuring the differential pressure on both sides of the first throttling device 11 through the two first pressure-taking pipes 12 may be taken as a reference.
When the flow rate of the flowing medium is high, the detection interference is caused by the excessive instantaneous flow rate of the flowing medium flowing through the first throttling device 11, so that the pressure difference obtained by the two second pressure taking pipes 22 at two sides of the second throttling device 21 is more suitable for judging the actual flow rate of the flowing medium than the pressure difference obtained by the two first pressure taking pipes 12 at two sides of the first throttling device 11, and at this time, the flow rate value calculated by measuring the pressure difference at two sides of the second throttling device 21 through the two second pressure taking pipes 22 can be used as the basis.
As an embodiment, as shown in fig. 1, the first throttling device 11 and the second throttling device 21 are each configured as a throttling nozzle having a throttling orifice 40, the orifice diameter of the throttling orifice 40 gradually decreasing in a first direction so that the throttling nozzle has a large diameter end and a small diameter end, the first direction being set as a flow direction of the flowing medium in the medium conduit 30, wherein a ratio of the orifice diameter of the small diameter end of the first throttling device 11 to the diameter of the medium conduit 30 is smaller than a ratio of the orifice diameter of the small diameter end of the second throttling device 21 to the diameter of the medium conduit 30. The arrangement is such that the instantaneous flow of the flow medium through the first throttling means 11 can be greater than the instantaneous flow of the flow medium through the second throttling means 21 at the same time.
Wherein the aperture of the small diameter end of the first throttling means 11 and the aperture of the small diameter end of the second throttling means 21 are both understood as nozzle throat diameters.
In some examples, the first and second throttle devices 11 and 21 may also be configured as orifice plates, which is not limited by the present disclosure.
In order to prevent the pressure differences across the first and second throttle devices 11 and 21 from interfering with each other, alternatively, as shown in fig. 1, the first and second throttle devices 11 and 21 are disposed at intervals in the first direction, and in the case where the ratio of the aperture of the small diameter end of the first throttle device 11 to the diameter of the medium conduit 30 is less than or equal to 0.4, the straight-line distance between the first and second throttle devices 11 and 21 is greater than or equal to 12 times the diameter of the medium conduit 30.
In some examples, the linear distance between the first and second restriction devices 11, 21 is greater than or equal to 12 times the diameter of the media conduit 30 when the ratio of the aperture of the small diameter end of the first restriction device 11 to the diameter of the media conduit 30 is equal to 0.4.
In one embodiment of the present disclosure, as shown in fig. 1, on-off valves 50 are provided on both the first pressure-taking pipes 12 and the second pressure-taking pipes 22.
The first flow rate detecting part 10 and the second flow rate detecting part 20 can be started or stopped by controlling the on-off valves 50 provided on the two first pressure taking pipes 12 and the two second pressure taking pipes 22.
In some examples, the on-off valve 50 may be a needle valve, which may be electronically controlled.
Optionally, the first detection range includes a first end value and a second end value, the second detection range includes a third end value and a fourth end value, the first end value is smaller than the second end value, the third end value is smaller than the fourth end value, the fourth end value is larger than the first end value and smaller than the second end value, and the first end value is larger than the third end value. By the arrangement, the first detection range and the second detection range are partially overlapped, and fluctuation of data in the switching process of the first flow detection part 10 and the second flow detection part 20 can be prevented, so that undisturbed switching measurement of the flow of the flowing medium is realized.
In one embodiment of the present disclosure, the first measurement range is 0t/h to 40t/h, the measurement accuracy of the first flow rate detection part 10 is ±1%, the second measurement range is 30t/h to 100t/h, and the measurement accuracy of the second flow rate detection part 20 is ±1%. Thus, the overlapping part of the first detection range and the second detection range is 30t/h-40t/h. That is, the first end value is 0t/h, the second end value is 40t/h, the third end value is 30t/h, and the fourth end value is 100t/h.
As an embodiment, as shown in fig. 1, the flow measurement device further includes a PLC controller 60, the first flow detection member 10 is electrically connected to the PLC controller 60, the second flow detection member 20 is electrically connected to the PLC controller 60, and the PLC controller 60 is configured to switch the first flow detection member 10 and/or the second flow detection member 20 to measure the flow rate of the flowing medium in the medium conduit 30.
The flow calculation formula and the automatic switching program may be set in the PLC controller 60, so that the differential pressure signals respectively measured by the first flow detection component 10 and the second flow detection component 20 may be transmitted to the PLC controller 60, the flow of the flowing medium at the two measurement points may be respectively calculated by the flow calculation formula set in the PLC controller 60, and the two flow calculation results may be respectively compared with the preset value to determine whether the two flow calculation results are the large flow or the small flow.
When the flow calculation is within 0t/h-30t/h, the first flow detection component 10 may be enabled to take flow measurements of the flowing medium within the medium conduit 30 using an automatic switching program.
When the flow calculation is within the range of 40t/h to 100t/h, the second flow detection component 20 may be enabled to take flow measurements of the flowing medium within the medium conduit 30 using an automatic switching program.
When the flow rate calculation result is within 30t/h-40t/h, the first flow rate detecting section 10 and the second flow rate detecting section 20 can each perform flow rate measurement on the flowing medium in the medium pipe 30.
Optionally, the PLC controller 60 may also be electrically connected to a secondary meter or DCS system, which is not limited by the present disclosure.
As an embodiment, as shown in fig. 1, the flow measurement device further includes a first differential pressure transmitter 70 and a second differential pressure transmitter 80, wherein an input end of the first differential pressure transmitter 70 is connected to the first flow detection part 10, an output end of the first differential pressure transmitter 70 is electrically connected to the PLC controller 60, the first differential pressure transmitter 70 is used for detecting a differential pressure signal of a first measurement point of the medium pipe 30 and transmitting the differential pressure signal to the PLC controller 60, an input end of the second differential pressure transmitter 80 is connected to a second end of the second flow detection part 20, an output end of the second differential pressure transmitter 80 is electrically connected to the PLC controller 60, and the second differential pressure transmitter 80 is used for detecting a differential pressure signal of a second measurement point of the medium pipe 30 and transmitting the differential pressure signal to the PLC controller 60.
The first differential pressure transmitter 70 and the second differential pressure transmitter 80 are both used for converting differential pressure signals into electrical signals, and then inputting the electrical signals into the PLC controller 60 to participate in logic operation.
Alternatively, the media tubing 30 is a tubing of DN10-DN1000, the wall thickness of the media tubing 30 being 3mm-10mm.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (10)
1. A flow measurement device for a media conduit, comprising a first flow detection component and a second flow detection component;
the first flow detection component and the second flow detection component are both used for being connected with the same medium pipeline, the first flow detection component is used for detecting the flow rate of the flowing medium at a first measuring point of the medium pipeline, and the second flow detection component is used for detecting the flow rate of the flowing medium at a second measuring point of the medium pipeline;
the first flow detection component is provided with a first detection range, the second flow detection component is provided with a second detection range, and the first detection range is partially overlapped with the second detection range.
2. The flow measurement device of a media line according to claim 1, wherein the first flow detection means comprises a first throttling device and two first pressure take-off tubes, and the second flow detection means comprises a second throttling device and two second pressure take-off tubes;
the first throttling device is arranged in the medium pipeline and is positioned on a first measuring point of the medium pipeline, and first ends of the two first pressure taking pipes are respectively positioned at two sides of the first throttling device and are connected with the medium pipeline so as to be used for acquiring pressure differences formed by flowing medium at two sides of the second throttling device when the flowing medium passes through the first throttling device;
the second throttling device is arranged in the medium pipeline and is positioned on a second measuring point of the medium pipeline, and the first ends of the two second pressure taking pipes are respectively positioned at two sides of the second throttling device and are connected with the medium pipeline, so that when flowing medium passes through the second throttling device, the pressure difference formed by the flowing medium at two sides of the second throttling device can be obtained.
3. The flow rate measurement device of a medium pipe according to claim 2, wherein the first throttling device and the second throttling device are each configured as a throttling nozzle having a throttling orifice whose aperture gradually decreases in a first direction so that the throttling nozzle has a large diameter end and a small diameter end, the first direction being set as a flow direction of a flowing medium in the medium pipe;
wherein the ratio of the aperture of the small diameter end of the first throttling device to the diameter of the medium pipeline is smaller than the ratio of the aperture of the small diameter end of the second throttling device to the diameter of the medium pipeline.
4. A flow rate measurement device for a medium conduit according to claim 3, wherein the first throttle device and the second throttle device are arranged at intervals in the first direction, and a straight line distance between the first throttle device and the second throttle device is 12 times or more the diameter of the medium conduit in a case where a ratio of an aperture of a small diameter end of the first throttle device to the diameter of the medium conduit is 0.4 or less.
5. The flow rate measurement device for a medium pipe according to claim 2, wherein on-off valves are provided on both the first pressure taking pipes and the second pressure taking pipes.
6. The media conduit flow measurement device of claim 1, wherein the first sensing range comprises a first end value and a second end value, the second sensing range comprises a third end value and a fourth end value, the first end value is less than the second end value, and the third end value is less than the fourth end value;
wherein the fourth end value is greater than the first end value and less than the second end value, the first end value being greater than the third end value.
7. The flow rate measurement device for a medium pipe according to claim 6, wherein the first detection range is 0t/h to 40t/h, and the detection accuracy of the first flow rate detection means is ±1%;
the second detection range is 30t/h-100t/h, and the detection precision of the second flow detection component is +/-1%.
8. The media line flow measurement device of any one of claims 1-7, further comprising a PLC controller;
the first flow detection component is electrically connected with the PLC;
the second flow detection component is electrically connected with the PLC;
the PLC is used for switching the first flow detection component and/or the second flow detection component to measure the flow of the flowing medium in the medium pipeline.
9. The media line flow measurement device of claim 8, further comprising a first differential pressure transmitter and a second differential pressure transmitter;
the input end of the first differential pressure transmitter is connected with the first flow detection component, the output end of the first differential pressure transmitter is electrically connected with the PLC, and the first differential pressure transmitter is used for detecting a differential pressure signal of a first measuring point of the medium pipeline and transmitting the differential pressure signal to the PLC;
the input end of the second differential pressure transmitter is connected with the second end of the second flow detection component, the output end of the second differential pressure transmitter is electrically connected with the PLC, and the second differential pressure transmitter is used for detecting a differential pressure signal of a second measuring point of the medium pipeline and transmitting the differential pressure signal to the PLC.
10. A flow measurement device for a media conduit according to any one of claims 1-7, wherein the media conduit is a DN10-DN1000 conduit and the media conduit has a wall thickness of 3mm-10mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322292708.6U CN220602603U (en) | 2023-08-24 | 2023-08-24 | Flow measuring device for medium pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322292708.6U CN220602603U (en) | 2023-08-24 | 2023-08-24 | Flow measuring device for medium pipeline |
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| CN220602603U true CN220602603U (en) | 2024-03-15 |
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| CN202322292708.6U Active CN220602603U (en) | 2023-08-24 | 2023-08-24 | Flow measuring device for medium pipeline |
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