CN222318177U - Standard meter method liquid flow standard device - Google Patents
Standard meter method liquid flow standard device Download PDFInfo
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- CN222318177U CN222318177U CN202421042895.0U CN202421042895U CN222318177U CN 222318177 U CN222318177 U CN 222318177U CN 202421042895 U CN202421042895 U CN 202421042895U CN 222318177 U CN222318177 U CN 222318177U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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Abstract
The utility model relates to the technical field of liquid flow standard devices, in particular to a standard meter method liquid flow standard device, which comprises a first rack and a second rack, wherein one side of a liquid inlet pipeline far away from a liquid tank is respectively connected with a test pipeline and a detected pipeline through a three-way valve, the test pipeline is connected with a first switch valve and a first electromagnetic flowmeter, the detected pipeline is connected with a second switch valve and a second electromagnetic flowmeter, one side of the detected pipeline far away from the liquid inlet pipeline is connected with a water pump, the detected pipeline is fixedly connected with a liquid outlet pipe at the middle position of one side of the water pump, the liquid outlet pipe and a recovery pipe are both connected with a pressure stabilizing tank, a control device is fixedly arranged at the rear side of the top of the first rack, the electromagnetic flowmeter in the device can be fully connected or partially connected, a wider flow range can be obtained by selecting different combinations of the electromagnetic flowmeter, and the working capacity of the standard meter method liquid flow standard device is improved.
Description
Technical Field
The utility model relates to the technical field of liquid flow standard devices, in particular to a standard meter method liquid flow standard device.
Background
The standard meter liquid flow standard device is a metering instrument used in the field of physics, and mainly comprises a liquid source, a test pipeline, a standard liquid flowmeter, a timer and control equipment, wherein the requirements of the standard meter liquid flow standard device on pipeline design, a control system and pressure stabilizing measures are the same as those of the static volume liquid flow standard device, standard flow can be given according to verification flow points, standard flow can also be given according to verification flow ranges, a single meter can be connected with the test pipeline in series, a plurality of meters can be connected with the test pipeline in series after being connected in parallel, and the standard liquid flowmeter can be various liquid flowmeters.
The standard meter method liquid flow standard device on the market at present cannot be combined differently according to the measured requirement, so that a wider flow range cannot be obtained, and the working capacity of the standard meter method liquid flow standard device is reduced.
Therefore, it is desirable to design a standard meter-method liquid flow standard device to solve the above-mentioned problems.
Disclosure of utility model
The utility model aims to provide a standard meter method liquid flow standard device to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
The standard meter method liquid flow standard device comprises a first rack and a second rack, wherein a liquid tank is fixedly arranged at the bottom end of the interior of the first rack, a liquid inlet pipeline is further connected to one side of the liquid tank, a test pipeline and a tested pipeline are respectively connected to one side of the liquid inlet pipeline, which is far away from the liquid tank, through a three-way valve, a first switch valve and a first electromagnetic flowmeter are connected to the test pipeline, a second switch valve and a second electromagnetic flowmeter are connected to the tested pipeline, the tested pipelines are fixedly communicated through connecting pipelines, the connecting pipelines are also fixedly connected with a second electromagnetic flowmeter, one side, which is far away from the liquid inlet pipeline, of the tested pipeline is fixedly connected with a liquid outlet pipe, a recovery pipe is connected to the upper side of the tested pipeline, which is located at the second rack, the liquid outlet pipe and the recovery pipe are both connected with a pressure stabilizing tank, and a control device is fixedly arranged at the rear side of the top of the first rack.
As a preferable scheme of the utility model, one side of the liquid inlet pipeline is fixedly connected with an interface on the liquid tank and is communicated with the inner cavity of the tank, the other side of the liquid inlet pipeline is connected with a three-way valve through threads, and the other two ends of the three-way valve are respectively connected with a main pipe of a test pipeline and a detected pipeline through threads.
As a preferable mode of the utility model, the second electromagnetic flowmeter on each detected pipeline is connected in parallel, and is connected in series with the test pipeline after being connected in parallel.
As a preferable scheme of the utility model, a fifth switch valve for controlling the pipeline of the liquid inlet pipeline is also arranged on the liquid inlet pipeline.
As a preferable scheme of the utility model, the recovery pipe is provided with a third switch valve and a pressure relief pipe, and the pressure relief pipe is also provided with a fourth switch valve.
In a preferred embodiment of the present utility model, the control device is provided with a timer, and the first electromagnetic flowmeter and the second electromagnetic flowmeter are both connected with the control device in a communication manner.
Compared with the prior art, the utility model has the beneficial effects that:
According to the standard meter method liquid flow standard device, when the standard meter method liquid flow standard device is used, a plurality of electromagnetic flow meters are connected in parallel and then connected with a test pipeline in series, so that the standard meter method water flow standard device in the scheme is formed.
Drawings
FIG. 1 is a schematic view of the overall three-dimensional structure of the present utility model;
FIG. 2 is a schematic three-dimensional structure of a pipeline to be inspected according to the present utility model;
FIG. 3 is a schematic three-dimensional structure of the recovery tube of the present utility model.
In the figure, 1, a first rack; 2, a second frame, 3, a liquid tank, 4, a liquid inlet pipeline, 41, a fifth switch valve, 5, a three-way valve, 6, a test pipeline, 7, a detected pipeline, 8, a first switch valve, 9, a first electromagnetic flowmeter, 10, a second switch valve, 11, a second electromagnetic flowmeter, 12, a water pump, 121, a connecting pipeline, 13, a liquid outlet pipe, 14, a recovery pipe, 15, a pressure stabilizing tank, 16, a control device, 17, a third switch valve, 18, a pressure relief pipe, 19 and a fourth switch valve.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present utility model are within the scope of protection of the present utility model.
In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. Several embodiments of the utility model are presented. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-3, the present utility model provides a technical solution:
The standard meter method liquid flow standard device comprises a first rack 1 and a second rack 2, wherein a liquid tank 3 is fixedly arranged at the bottom end of the inside of the first rack 1, a liquid inlet pipeline 4 is further connected to one side of the liquid tank 3, a test pipeline 6 and a detected pipeline 7 are respectively connected to one side of the liquid inlet pipeline 4, which is far away from the liquid tank 3, through a three-way valve 5, a first switch valve 8 and a first electromagnetic flowmeter 9 are connected to the test pipeline 6, a second switch valve 10 and a second electromagnetic flowmeter 11 are connected to the detected pipeline 7, each detected pipeline 7 is fixedly communicated through a connecting pipeline 121, a second electromagnetic flowmeter 11 is also connected to each connecting pipeline 121, a water pump 12 is connected to one side, which is far away from the liquid inlet pipeline 4, of the detected pipeline 7, a liquid outlet pipe 13 is fixedly connected to the middle position of one side, which is located at the water pump 12, of the detected pipeline 7, a recovery pipe 14 is connected to the upper side, which is located at the second rack 2, of the test pipeline 6, the liquid outlet pipe 13 and the recovery pipe 14 are both connected to a pressure stabilizing tank 15, and a control device 16 is fixedly arranged at the rear side of the top of the first rack 1.
Specifically, one side of the liquid inlet pipeline 4 is fixedly connected with an interface on the liquid tank 3 and is communicated with the inner cavity of the tank, the other side of the liquid inlet pipeline is connected with the three-way valve 5 through threads, and the other two ends of the three-way valve 5 are respectively connected with a main pipe of the test pipeline 6 and the detected pipeline 7 through threads; the second electromagnetic flowmeter 11 on each detected pipeline 7 is connected in parallel and then connected in series with the test pipeline 6 after being connected in parallel, the liquid inlet pipeline 4 is further provided with a fifth switching valve 41 for controlling the pipeline, the recovery pipe 14 is provided with a third switching valve 17 and a pressure relief pipe 18, the pressure relief pipe 18 is further provided with a fourth switching valve 19, the pressure relief pipe 18 can be opened for pressure relief by opening the fourth switching valve 19, the excessive pressure in the pipeline is avoided, the control device 16 is provided with a timer, the first electromagnetic flowmeter 9 and the second electromagnetic flowmeter 11 are both connected with the control device 16 in communication, 5 second electromagnetic flowmeters 11 are connected in parallel and then connected in series with the test pipeline 6 to form a standard meter water flow standard device in the scheme, when in operation, the fifth switching valve 41, the second switching valve 10, the first switching valve 8, the first electromagnetic flowmeter 9 and the second electromagnetic flowmeter 11 can be started for flow measurement, all electromagnetic flowmeters can be opened, different combinations of electromagnetic flowmeters can be selected, the wide range of the liquid flow can be obtained, the standard meter can be increased, and the liquid can be recovered to the stable pressure tank 15 after the measurement can be carried out by using the standard meter.
The three-way valve 5, the first switch valve 8, the second switch valve 10, the third switch valve 17 and the fourth switch valve 19 are all electric control valves, and can be controlled electrically by the control device 16.
The electromagnetic flowmeter works in such a way that the induced electromotive force generated by the flow of the conductive fluid in the magnetic field is proportional to the flow. The electromagnetic flowmeter has no mechanical parts, so that the electromagnetic flowmeter has wide measuring range, no mechanical inertia, sensitive response, no pressure loss when fluid passes through, no abrasion, no blockage and other problems. Therefore, the electromagnetic flowmeter is a typical device of a standard water flow standard device by a standard meter method.
The working principle of the standard meter method water flow standard device is based on a continuity equation of fluid mechanics, h electromagnetic flow meters are used as standard devices, water continuously passes through the electromagnetic flow meters and the test pipeline at a certain flow rate, and at the moment, the instantaneous volume flow rate given by the standard meter method water flow standard device is calculated according to the formula: Wherein qv-instantaneous volume flow, m3/s, q w -flow of the w-th electromagnetic flowmeter, m3/s.
The accumulated volume flow given by the standard water flow standard device is calculated according to the formula of QV=qv.t, wherein QV is the accumulated volume flow, m3, and QV is the measurement time of the electromagnetic flowmeter, s.
The standard meter method water flow standard device is usually used according to the verification range of the electromagnetic flowmeter, namely, the standard meter method water flow standard device is used in a non-fixed point mode. When the flow rate is tested, the electromagnetic flow meters are selected and combined according to the tested flow rate points of the tested flow meters, the upstream and downstream valves of the electromagnetic flow meters which do not participate in the test are closed, and the upstream and downstream valves of the selected electromagnetic flow meters are opened, so that water circulates in a system consisting of the pressure stabilizing tank, the selected electromagnetic flow meters, the tested flow meters, the water tank and the water pump. And finally, starting measurement, and recording output values of the selected electromagnetic flowmeter and the measured flowmeter. After a certain time, the output values of the selected electromagnetic flowmeter and the measured flowmeter are stopped being recorded at the same time. The flow values measured by the two are compared to determine the metering performance of the measured flow meter.
Selecting m (m is more than or equal to 10) flow points in the range of the electromagnetic flowmeter, calibrating each point once to obtain a flow correction value delta Q j or delta Q j, providing a least square fitting curve of Q j and delta Q j according to instantaneous flow calibration, providing a least square fitting curve of Q j and delta Q j according to accumulated flow calibration, and determining delta Q j＝a+bqj+vj when Q j and delta Q j are linearly matched, wherein delta Q j -flow correction value and Q j -calibration point flow, wherein the principle of determining a and b values is thatThe minimum value of the total number of the components, then Δq= a+b.q
Standard deviation of the functional expression of the flow-to-flow correction value:
Relative standard uncertainty of functional expression of flow-to-flow correction value:
Where u w - - -the relative standard uncertainty of the functional expression of the flow-flow correction value,%; q j - - -the usual flow of an electromagnetic flowmeter, m 3/h.
The relative standard uncertainty of the standard flowmeter of the parallel h electromagnetic flowmeters is calculated according to the formula (8-9): Wherein q w - -the flow corresponding to the w-th electromagnetic flowmeter, m 3/h, and u 21＝uw when w=1.
The relative standard uncertainty of the flow given by the upper-level water flow standard device for verifying the electromagnetic flowmeter is u 22, if the electromagnetic flowmeter is verified without a matched instrument, the introduced relative standard uncertainty of the flow is u 23, and if the fluid condition of the electromagnetic flowmeter in detection is inconsistent with that in use, the relative standard uncertainty of the flow caused by the influence of the fluid condition is u 24.
The flow relative standard uncertainty caused by uncertainty of data acquisition, signal processing, data processing and communication is u 25.
When the standard meter method liquid flow standard device is used, a plurality of electromagnetic flow meters are connected in parallel and then connected with a test pipeline in series to form the standard meter method liquid flow standard device in the scheme, and when the standard meter method liquid flow standard device works, the electromagnetic flow meters can be completely or partially connected, different combinations of the electromagnetic flow meters can be selected, a wider flow range can be obtained, the working capacity of the standard meter method liquid flow standard device is improved, the electromagnetic flow meters are used for measuring the liquid flow, and the measured liquid can be recovered into the pressure stabilizing tank 15 for pressure stabilizing operation or can be collected into the liquid tank 3 for use.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The standard meter method liquid flow standard device comprises a first rack (1) and a second rack (2), and is characterized in that a liquid tank (3) is fixedly arranged at the bottom end of the first rack (1), one side of the liquid tank (3) is also connected with a liquid inlet pipeline (4), one side of the liquid inlet pipeline (4) far away from the liquid tank (3) is respectively connected with a test pipeline (6) and a tested pipeline (7) through a three-way valve (5), the test pipeline (6) is connected with a first switch valve (8) and a first electromagnetic flowmeter (9), the tested pipeline (7) is connected with a second switch valve (10) and a second electromagnetic flowmeter (11), each tested pipeline (7) is fixedly communicated through a connecting pipeline (121), each connecting pipeline (121) is also connected with a second electromagnetic flowmeter (11), one side of the tested pipeline (7) far away from the liquid inlet pipeline (4) is respectively connected with a water pump (12), the tested pipeline (7) is connected with a water pump (12) at one side of the middle position (14) which is fixedly connected with a liquid outlet pipe (14) on the first recovery pipeline (14) which is fixedly connected with the middle position (14), the control device (16) is fixedly arranged on the rear side of the top of the first frame (1).
2. The standard meter method liquid flow standard device according to claim 1, wherein one side of the liquid inlet pipeline (4) is fixedly connected with an interface on the liquid tank (3) and is communicated with the inner cavity of the tank, the other side of the liquid inlet pipeline is connected with the three-way valve (5) through threads, and the other two ends of the three-way valve (5) are respectively connected with a main pipe of the test pipeline (6) and a main pipe of the detected pipeline (7) through threads.
3. The standard meter liquid flow standard device according to claim 1, wherein the second electromagnetic flowmeter (11) on each of the test lines (7) is connected in parallel and then connected in series with the test line (6) after being connected in parallel.
4. The standard meter method liquid flow standard device according to claim 1, wherein a fifth switch valve (41) for controlling the liquid inlet pipeline (4) is further arranged on the liquid inlet pipeline.
5. The standard meter method liquid flow standard device according to claim 1, wherein the recovery pipe (14) is provided with a third switch valve (17) and a pressure release pipe (18), and the pressure release pipe (18) is also provided with a fourth switch valve (19).
6. The standard meter method liquid flow standard device according to claim 1, wherein a timer is arranged on the control device (16), and the first electromagnetic flowmeter (9) and the second electromagnetic flowmeter (11) are all in communication connection with the control device (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421042895.0U CN222318177U (en) | 2024-05-14 | 2024-05-14 | Standard meter method liquid flow standard device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421042895.0U CN222318177U (en) | 2024-05-14 | 2024-05-14 | Standard meter method liquid flow standard device |
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| Publication Number | Publication Date |
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| CN222318177U true CN222318177U (en) | 2025-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202421042895.0U Active CN222318177U (en) | 2024-05-14 | 2024-05-14 | Standard meter method liquid flow standard device |
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- 2024-05-14 CN CN202421042895.0U patent/CN222318177U/en active Active
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