CN207317905U - Flowmeter calibrating installation - Google Patents
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- CN207317905U CN207317905U CN201721420724.7U CN201721420724U CN207317905U CN 207317905 U CN207317905 U CN 207317905U CN 201721420724 U CN201721420724 U CN 201721420724U CN 207317905 U CN207317905 U CN 207317905U
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- 238000009434 installation Methods 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 132
- 239000007788 liquid Substances 0.000 claims description 83
- 238000004891 communication Methods 0.000 claims description 62
- 238000003860 storage Methods 0.000 claims description 38
- 238000005303 weighing Methods 0.000 claims description 37
- 238000000034 method Methods 0.000 claims description 20
- 238000012360 testing method Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
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- 230000005674 electromagnetic induction Effects 0.000 description 1
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Abstract
The utility model provides flowmeter calibrating installation, including：One the oneth NI communicators (10), one the 2nd NI communicators (11), a server (13), a main line (19) and the water-storing device (1) being sequentially arranged on main line (19), a water pump (2), a DN50 standard scales pipeline (18), tested flowmeter (4) can be installed on main line (19)；The water intake end of main line (19) is connected to the water outlet end of water-storing device (1), and the backwater end of main line (19) is connected to the water inlet end of water-storing device (1)；First NI communicators (10) are electrically connected with water pump (2)；DN50 standard scales pipeline (18) includes at least one proving flowmeter (3), and at least one proving flowmeter (3) is DN50 proving flowmeters.
Description
Technical Field
The utility model relates to a calibration technical field of flowmeter particularly, relates to flowmeter calibrating device suitable for the small velocity of flow.
Background
With the increasing requirements of users on product quality, process control, production flow and cost control, the requirements on the precision and performance of flow meter products entering various fields are also increasing. How to build a high-precision, high-reliability and high-efficiency flow calibration device has become an important ring in the flow calibration work.
At present, the following methods are mainly used for flow calibration in the related art: volumetric, gravimetric and standard flow meter methods.
The volumetric method and the weighing method are widely applied to enterprises, but have the problems of low efficiency, long measuring time, difficult maintenance, easy interference, narrow application range, high cost and the like. Moreover, as the size of pipelines increases, the cost is multiplied, and thus, the volumetric method and the weighing method have become more difficult to meet the needs of enterprises.
The standard flowmeter method is to use a flowmeter as a measurement reference, continuously pass a fluid through the standard flowmeter and a to-be-tested flowmeter at the same time interval, and compare output flow rate values of the standard flowmeter and the to-be-tested flowmeter to determine the measurement performance of the to-be-tested flowmeter. The standard flowmeter method has been accepted by more and more users due to its wide application range, strong anti-interference capability, high efficiency and high reliability.
However, in the related art, when the flow rate of the liquid is a small flow rate, the flow meter calibration device has a problem that the calibration is not stable.
SUMMERY OF THE UTILITY MODEL
The utility model discloses embodiment provides a flowmeter calibrating device to solve the relatively poor problem of stability that exists in the calibration of the velocity of flow among the correlation technique at least.
According to an embodiment of the present invention, there is provided a flow meter calibrating device, including: the system comprises a first NI communication device, a second NI communication device, a server, a main pipeline, a water storage device, a water pump and a DN50 standard meter pipeline, wherein the water storage device, the water pump and the DN50 standard meter pipeline are sequentially arranged on the main pipeline; the water inlet end of the main pipeline is connected to the water outlet end of the water storage device, and the water return end of the main pipeline is connected to the water inlet end of the water storage device; the first NI communication device is electrically connected with the water pump and used for controlling the water pump to adjust the flow rate of liquid stored in the water storage device flowing into the main pipeline from the water outlet end of the water storage device; the DN50 standard meter pipeline comprises at least one standard flowmeter, at least one standard flowmeter is a DN50 standard flowmeter, and the standard flowmeter is used for detecting flow speed signals of liquid flowing through the DN50 standard meter pipeline under the condition that the flow speed is 4 to 40 cubic meters per hour; the second NI communication device is electrically connected with the at least one standard flowmeter and is used for collecting flow rate signals from the at least one standard flowmeter; and the server is electrically connected with the second NI communication device and used for calibrating the detected flowmeter according to the flow speed signal.
Through the structure, the problem of instability in small flow rate calibration in the related technology is solved, and the small flow rate calibration stability is improved.
In one illustrative embodiment of the flow meter calibration device, the DN50 prover line further includes two butterfly valves mounted in series across at least one of the prover meters for enabling or disabling the DN50 prover line.
Through the structure, two butterfly valves are installed at two ends of the standard flowmeter in series in the pipeline of the DN50 standard meter, and whether liquid flows through the standard flowmeter in the pipeline of the DN50 standard meter can be controlled through the butterfly valves, so that the pipeline of the DN50 standard meter can be prevented from being used for calibrating the detected flowmeter by closing the butterfly valves under the condition that the liquid flow rate is high; the flow rate signal of small flow rate can be stably and accurately measured by opening the butterfly valve under the condition that the liquid flow rate is low, namely by using the flowmeter of the DN50 standard meter pipeline, so that the stability of small flow rate calibration is improved.
In an exemplary embodiment of the flow meter calibration apparatus, further comprising: a third NI communication device electrically connected to the butterfly valve for controlling the butterfly valve to activate the DN50 prover line to flow liquid through the DN50 prover line at a flow rate of 4 to 40 cubic meters per hour, and otherwise to deactivate the DN50 prover line to prevent liquid from flowing through the DN50 prover line.
Through the structure, the third NI communication device is electrically connected with the butterfly valve, and the opening and closing of the butterfly valve can be controlled through the third NI communication device, so that the opening and closing of the butterfly valve can be controlled according to the flow rate of liquid, and whether the liquid can pass through the DN50 standard meter pipeline or not is further controlled, namely, whether the test pipeline for calibrating the detected flowmeter is the DN50 standard meter pipeline or not is determined through the control of the third NI communication device on the butterfly valve.
In an exemplary embodiment of the flow meter calibration device, the at least one reference flow meter comprises two reference flow meters mounted in series, each reference flow meter outputting a respective flow rate signal; and the server calculates the average value of the flow speed signals respectively output by the two standard flowmeters which are installed in series, and calibrates the detected flowmeter according to the average value of the flow speed signals.
Typically, the flow meter calibration apparatus only uses one standard flow meter, which results in the calibration result being excessively dependent on the detection result of a single standard flow meter, and if there is a problem with the standard flow meter, the calibration error will be large. In the exemplary embodiment of the flow meter calibration device of the present application, two or more standard flow meters are used, and the detection results are averaged and converted into a flow rate, thereby improving the accuracy of the calibration table detection.
In an exemplary embodiment of the flowmeter calibration device, the flowmeter calibration device further comprises at least one DN200 standard meter pipeline, the at least one DN200 standard meter pipeline is connected with the DN50 standard meter pipeline in parallel and then connected to the main pipeline in series, and the DN50 standard meter pipeline is used for detecting the average value of flow speed signals flowing through the at least one DN200 standard meter pipeline to calibrate the tested flowmeter under the condition that the flow speed is greater than 40 cubic meters per hour.
Through the structure, the DN200 standard meter pipeline and the DN50 standard meter pipeline are connected in parallel and then connected in series on the main pipeline, so that the flow path of liquid can be controlled by opening and closing the inlet and outlet valves of the corresponding pipelines under different liquid flow rates, and the liquid with different flow rates can be measured by using different standard meter pipelines.
In an exemplary embodiment of the flow meter calibrating device, the flow meter calibrating device further includes a control valve installed in series on the main pipeline between the water inlet end of the water storage device and the flow meter to be tested and electrically connected to the first NI communication device, and the control valve is configured to regulate the liquid pressure of the main pipeline under the control of the first NI communication device.
Through above-mentioned structure, between water storage device's the water inlet end and the flowmeter of being examined, install the control valve in series on the main pipeline, and establish this control valve and first NI communication device's electricity and be connected, can control this control valve through first NI communication device, thereby adjust the fluid pressure of main pipeline, and then the liquid velocity in the control main pipeline, make fluid pressure or the velocity of flow in the main pipeline can carry out effective control according to the in-service use demand, avoid the too big or undersize flow state of influence water of pressure.
In an exemplary embodiment of the flow meter calibration device, the main line comprises a return line between the water inlet end of the water reservoir and the control valve; the flow meter calibration device further comprises a standard meter calibration device which is connected between the control valve and the water storage device, is connected with the water return pipeline in parallel and is used for calibrating at least one standard flow meter according to a weighing method.
Through the structure, a standard meter calibration device is connected between the control valve and the water storage device, a standard flowmeter can be calibrated according to a weighing method, so that the standard flowmeter can accurately measure the flow, and in addition, through the structure, a set of closed loop exists in the flowmeter calibration device through a water return pipeline between the water inlet end and the control valve, so that liquid can flow in the closed loop, and the flowing circulation of the liquid is completed; the standard meter calibrating device is connected with the water return pipeline in parallel, so that a closed loop can be formed by using the standard meter calibrating device to replace the water return pipeline under the condition that the standard flowmeter is calibrated by adopting a weighing method, and the flowing circulation of liquid is completed.
In an exemplary embodiment of the flow meter calibration device, the standard meter calibration device includes a weigh tank for calibrating the at least one standard flow meter based on a mass of liquid flowing into the weigh tank.
With the above structure, at least one standard flowmeter can be calibrated by measuring the mass of the liquid flowing in according to the weighing tank in the standard flowmeter calibration device, so that the standard flowmeter can accurately measure the flow.
In an exemplary embodiment of the flow meter calibration device, the standard meter calibration device further includes a diverter mounted at the inlet of the weigh tank for controlling whether liquid flows into the water reservoir via the weigh tank.
Through above-mentioned structure, install the steering gear at the water inlet department of weighing jar, can control opening of the weighing jar of liquid flow through the steering gear and stop, through the contrast between the water of flowing into weighing jar and the discharge of the standard flowmeter of flowing through, accomplish the calibration to standard flowmeter.
In an exemplary embodiment of the flow meter calibration device, the flow meter calibration device further includes two switching valves respectively installed at the water inlet of the water return line and the water inlet of the weighing tank, and electrically connected to the first NI communication device, for switching the flow direction of the liquid between the standard meter calibration device and the water return line under the control of the first NI communication device.
Through above-mentioned structure, install two conversion valves respectively in the water return pipeline and the water inlet department of weighing jar to establish two conversion valves and first NI communication device and be connected electrically, can realize the selection to liquid inflow water return pipeline and weighing jar through the control of first NI communication device to conversion valves, make liquid can carry out the switching of liquid flow direction according to the in-service use demand between standard table calibrating device and water return pipeline, switch between the flowmeter of being examined in the calibration promptly and the calibration standard flowmeter.
Through the utility model discloses, because DN50 standard meter pipeline includes that the bore of at least one standard flowmeter is 50 millimeters, be 4 to 40 cubic meter per hour's the condition at the velocity of flow like this under, detect the liquid flow who flows through DN50 standard meter pipeline. Therefore, the utility model provides an unstable problem that exists in the calibration of the velocity of flow among the prior art, have the beneficial effect of the stability of the calibration of the velocity of flow of improvement.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided to explain the invention and not to constitute an undue limitation on the invention. In the drawings:
fig. 1 is a block diagram of a flowmeter calibration apparatus according to an embodiment of the present invention.
The reference symbol table is as follows: 1. a water storage device; 2. a water pump; 3. a standard flow meter; 4. a detected flowmeter; 5. a control valve; 6. a diverter; 7. weighing the tank; 8. a drain valve; 9 and 9', switching valves; 10. a first NI communication device, 11, a second NI communication device; 12. a third NI communication device; 13. a server; 14. DN200 standard table pipeline; 15 and 16, butterfly valves; 17. a standard meter calibration device; 18. DN50 standard table pipeline; 19. a main pipeline; 21. a water return pipeline.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
In an exemplary embodiment of the present invention, a flow meter calibration device is provided.
Fig. 1 is a schematic structural diagram of a flow meter calibration device according to an exemplary embodiment of the present invention, as shown in fig. 1, including: a first NI communication device 10, a second NI communication device 11, a server 13, a main pipeline 19, and a water storage device 1, a water pump 2, a DN50 standard meter pipeline 18 sequentially installed on the main pipeline 19, wherein the detected flow meter 4 can be installed on the main pipeline 19; wherein, the water inlet end of the main pipeline 19 is connected with the water outlet end of the water storage device 1, and the water return end of the main pipeline 19 is connected with the water inlet end of the water storage device 1; the first NI communication device 10 is electrically connected to the water pump 2 for controlling the water pump 2 to regulate the flow rate of the liquid stored in the water storage device 1 from the water outlet end of the water storage device 1 into the main pipe 19; the DN50 standard meter pipeline 18 comprises at least one standard flowmeter 3, the at least one standard flowmeter 3 is a DN50 standard flowmeter and is used for detecting a flow rate signal of liquid flowing through the DN50 standard meter pipeline 18 under the condition that the flow rate is 4 to 40 cubic meters per hour; the second NI communication means 11 is electrically connected to the at least one standard flow meter 3 for collecting flow rate signals from the at least one standard flow meter 3; and the server 13 is electrically connected to the second NI communication device 11 for calibrating the flow meter 4 to be tested according to the flow rate calculated from the flow velocity signal.
In the flow meter calibrating device, the flow meter calibrating device comprises a main pipeline 19, a water storage device 1 and a DN50 standard meter pipeline 18, wherein the water inlet end of the main pipeline 19 is connected with the water outlet end of the water storage device 1, the water return end of the main pipeline 19 is connected with the water inlet end of the water storage device 1, the flow rate of liquid stored in the water storage device 1 flowing into the main pipeline 19 from the water outlet end of the water storage device 1 can be adjusted through a water pump 2 connected on the main pipeline 19, and under the condition that the liquid flow rate is 4-40 cubic meters per hour, the liquid can accurately measure the flow rate generated when the liquid flows through the DN50 standard meter pipeline 18 through the standard flow meter 3 in the DN50 standard meter pipeline 18, so that the flow meter 4 to be tested on the main pipeline 19 can be calibrated according to the flow rate measured by the standard flow meter 3, and further the flow rate signal of small flow rate can be stably and, the method solves the problem of instability in small flow rate calibration in the related technology, and has the beneficial effect of improving the stability of small flow rate calibration.
In one exemplary embodiment, electrically connecting the first NI communication device 10 to the water pump 2 enables automatic control of the water pump 2 via the first NI communication device 10, thereby automatically adjusting the flow rate of the liquid stored in the water reservoir 1 from the water outlet end of the water reservoir 1 into the main pipe 19.
In an exemplary embodiment, the first NI communication device 10 is electrically connected to the server 13, and the first NI communication device 10 may be controlled by the server 13 to issue instructions to the water pump 2 for controlling the flow rate of the liquid.
In an exemplary embodiment, the second NI communication device 11 is electrically connected to at least one standard flowmeter 3, and the at least one standard flowmeter 3 collects a flow rate signal of the liquid flowing through itself and transmits a current and pulse signal representing the flow rate signal to the second NI communication device 11, so that the second NI communication device 11 can obtain the current and pulse signal representing the flow rate signal, and the server 13 calculates the flow rate according to the current and pulse signal obtained by the second NI communication device 11 and accurately calibrates the flow meter 4 to be tested.
In an exemplary embodiment, the server 13 is used for error calculation, calibration, and the like. Normally, the server 13 stops the pulse count of the flow meter 4 to be tested and the standard flow meter 3. In the standard flow meter mode, the synchronization signal is not triggered by any physical device, but is initiated by the server 13. The starting signal sent by the server 13 is divided into two paths, wherein one path is used for controlling the start and stop of a pulse counter of the standard flowmeter 3; and the other path is used for controlling the start and stop of pulse counting of the detected flowmeter 4.
In an exemplary embodiment, the server 13 is managed synthetically by application software. The system has the main function of realizing intelligent communication between the standard flowmeter 3 and the detected flowmeter 4 by means of the support of a database, so that the optimal process parameters can be flexibly and automatically set under different flow rates according to the characteristics of different technologies, flowmeters with different sizes and the standard flowmeters.
Specifically, the database stores information such as parameters of various types of flowmeters, parameters of the standard flowmeter 3, and various flow points corresponding to different calibers. When a user accesses a flow meter into the system, the system can identify information about the flow meter, read parameters associated with calibration using read commands, or configure and modify parameters of the flow meter to complete the calibration process.
In an exemplary embodiment, the water pump 2 may be a variable frequency variable speed water pump.
In an exemplary embodiment, the reference flow meter 3 may be an electromagnetic flow meter (EMF), which is an instrument that measures the flow of a conductive fluid based on the EMF induced when the conductive fluid passes through an applied magnetic field using the principles of electromagnetic induction. The electromagnetic flowmeter comprises a magnetic circuit system and a measuring conduit. The magnetic circuit system is used for generating a direct current or alternating current magnetic field which is uniformly distributed in the measuring guide pipe; and the measuring conduit is used for allowing the measured conductive liquid to pass through, and when magnetic lines of force generated by the magnetic circuit system pass through the measuring conduit, the measured flux is shunted or short-circuited. In the case of a liquid flowing through a standard flowmeter 3, the magnetic lines generated by the liquid cutting the magnetic circuit system in the measuring conduit of the standard flowmeter 3 are processed by the transmitter to display the flow rate flowing through the flowmeter.
In one illustrative embodiment, the DN50 prover line 18 further includes two butterfly valves 15, 16 mounted in series across at least one of the prover meters 3 for enabling or disabling the DN50 prover line 18.
According to the above embodiment, the butterfly valves 15 and 16 are installed in series at two ends of the standard flowmeter 3 in the DN50 standard meter pipeline 18, whether liquid flows through the standard flowmeter 3 in the DN50 standard pipeline 18 can be controlled through the butterfly valves 15 and 16, so that the DN50 standard meter pipeline 18 can be avoided by closing the butterfly valves 15 and 16 under the condition that the liquid flow rate is high, and meanwhile, one of the DN200 standard pipelines 14 is started to measure the liquid with large flow rate; the stability of the calibration of small flow rates can also be improved by opening the butterfly valves 15, 16 in the case of low liquid flow rates, for example, small flow rates of 4 to 40 cubic meters per hour, i.e., by stably and accurately measuring the flow rate signal of the small flow rate using the standard flow meter 3 of the DN50 standard meter pipeline 18.
In one illustrative embodiment, the flow meter calibration device further comprises: a third NI communication device 12 electrically connected to the butterfly valves 15, 16 for controlling the butterfly valves 15, 16 to activate the DN50 prover pipeline 18 to allow liquid to flow through the DN50 prover pipeline 18 at a flow rate of 4 to 40 cubic meters per hour, otherwise controlling the butterfly valves 15, 16 to deactivate the DN50 prover pipeline 18 to prevent liquid from flowing through the DN50 prover pipeline 18.
According to the above embodiment, electrically connecting the third NI communication device 12 with the butterfly valves 15, 16, the opening and closing of the butterfly valves 15, 16 may be controlled by the third NI communication device 12, i.e. by the third NI communication device 12, the opening and closing of the butterfly valves 15, 16 may be controlled according to the flow rate of the liquid, thereby controlling whether the liquid may pass through the DN50 standard gauge line 18.
In an exemplary embodiment, the server 13 is electrically connected to the third NI communication device 12, and the opening and closing of the butterfly valves 15, 16 may be controlled by the server 13 commanding the third NI communication device 12.
In an exemplary embodiment, the at least one reference flowmeter 3 comprises two reference flowmeters 3 mounted in series, each reference flowmeter 3 being configured to detect a flow rate signal; and the server 13 averages the flow rate signals respectively detected by the two standard flowmeters 3 installed in series, and calibrates the flow meter 4 to be detected based on the averaged flow rate signals.
Usually, the flowmeter calibration device only uses one standard flowmeter 3, which results in that the calibration result is excessively dependent on the detection result of a single standard flowmeter 3, and if there is a problem with the standard flowmeter 3, it will result in measurement errors. In the exemplary embodiment of the flow meter calibration device of the present application, two or more standard flow meters 3 are used, and the detection results are averaged, so that the accuracy of the calibration table detection is improved.
In an exemplary embodiment, the flowmeter further comprises at least one DN200 standard meter pipeline 14 connected in parallel with the DN50 standard meter pipeline 18 and connected in series on the main pipeline 19, and the flow rate of the liquid flowing through the at least one DN200 standard meter pipeline 14 is detected under the condition that the flow rate is more than 40 cubic meters per hour, so that the flowmeter 4 to be tested can be calibrated.
According to the above embodiment, by connecting the DN200 standard meter pipeline 14 and the DN50 standard meter pipeline 18 in parallel and then connecting them in series on the main pipeline 19, it is possible to pass liquid through the DN200 standard meter pipeline 14 in the case that the liquid flow rate is more than 40 cubic meters per hour, so that it is possible to accurately measure the flow rate signal of a large flow rate through the DN200 standard meter pipeline 14; also, by providing the DN50 prover line 18 in parallel with the DN200 prover line 14, a small flow rate of liquid through the DN200 prover line 14 can be avoided at a liquid flow rate of less than 40 cubic meters per hour.
In an exemplary embodiment, the flow meter calibrating device further comprises a control valve 5, which is mounted in series on the main line 19 between the water inlet end of the water storage device 1 and the flow meter 4 to be tested, and is electrically connected to the first NI communication device 10, the control valve 5 being adapted to regulate the liquid pressure of the main line 19 under the control of the first NI communication device 10.
According to the above embodiment, the control valve 5 is installed in series on the main pipe 19 between the water inlet end of the water storage device 1 and the flow meter 4 to be tested, and the control valve 5 is electrically connected to the first NI communication device 10, and the control valve 5 can be controlled by the first NI communication device 10 to adjust the liquid pressure of the main pipe 19, thereby controlling the liquid flow rate in the main pipe 19 in coordination with the water pump 2. In an exemplary embodiment of the present embodiment, the first NI communication device 10 is configured to control the opening degree of the control valve 5, for example, when the opening degree of the control valve 5 is increased, the pressure of the liquid in the main line 19 is decreased, and the flow rate of the liquid in the main line 19 is increased; when the opening degree of the control valve 5 is decreased, the pressure of the liquid in the main line 19 is increased, and the flow rate of the liquid in the main line 19 is decreased.
In an exemplary embodiment, the main line 19 comprises a return line 21 between the water inlet end of the water reservoir 1 and the control valve 5; the flow meter calibration device further comprises a standard meter calibration device 17 connected in parallel with the return line 21. A standard meter calibration device 17 is connected between the control valve 5 and the water storage device 1 for calibrating the at least one standard flow meter 3 according to a weighing method.
According to the embodiment, the standard meter calibration device 17 is connected between the control valve 5 and the water storage device 1, so that the standard flowmeter 3 can be calibrated according to a weighing method, the standard flowmeter 3 can stably and accurately measure the flow rate signal of the liquid with the small flow rate, and the stability of small flow rate calibration is improved.
In addition, according to the above embodiment, a set of closed loop exists in the flow meter calibration device through the water return pipeline 21 between the water inlet end of the water storage device 1 and the control valve 5, so that the liquid can flow in the closed loop, and the flow circulation of the liquid is completed; in addition, the standard meter calibration device 17 is connected in parallel with the water return pipe 21, and in the case of calibrating the standard flow meter 3 by a weighing method, the standard meter calibration device 17 is used to form a closed loop instead of the water return pipe 21, so that the flow circulation of the liquid is completed.
In an exemplary embodiment, the standard meter calibration means 17 comprises a weighing tank 7 for calibrating the at least one standard flow meter 3 in dependence on the mass of the liquid flowing into the weighing tank 7.
According to the embodiment, at least one standard flowmeter 3 can be calibrated by measuring the mass of the inflowing liquid according to the weighing tank 7 in the standard meter calibration device 17, so that the standard flowmeter 3 can stably and accurately measure the flow rate signal of the liquid with small flow rate, and the stability of small flow rate calibration is improved.
In an exemplary embodiment of the present embodiment, the weighing tank 7 is connected to the water reservoir 1 via a drain line, wherein a drain valve 8 is arranged on the drain line, wherein the liquid in the weighing tank 7 can be drained into the water reservoir 1 when the drain valve 8 is opened.
In an exemplary embodiment, the standard meter calibration device 17 further comprises a diverter 6 mounted at the water inlet of the weighing tank 7 for controlling whether liquid flows into the water storage device 1 via the weighing tank 7.
According to the above embodiment, by installing the diverter 6 at the water inlet of the weighing tank 7, it is possible to control whether or not the liquid flows into the water storage device 1 via the weighing tank 7 by the diverter 6, and thus to control the weight of the liquid flowing into the weighing tank 7.
In an exemplary embodiment, the flow meter calibration device further comprises two switching valves 9 and 9' mounted at the water return line 21 and the water inlet of the weighing tank 7, respectively, and electrically connected to the first NI communication device 10 for switching the flow direction of the liquid between the standard meter calibration device 17 and the water return line 21 under the control of the first NI communication device 10.
According to the above embodiment, the two switching valves 9 and 9 ' are respectively installed at the water inlet of the water return pipeline 21 and the water inlet of the weighing tank 7, and the two switching valves 9 and 9 ' are electrically connected with the first NI communication device 10, so that the selection of the liquid flowing into the water return pipeline 21 and the weighing tank 7 can be realized by controlling the switching valves 9 and 9 ' by the first NI communication device 10, and the liquid can be switched between the standard meter calibration device 17 and the water return pipeline 21 according to the actual use requirement, that is, switched between the two loops calibrating the standard meter flowmeter and calibrating the flowmeter to be tested.
For example, in the case where it is necessary to make the liquid flow into the standard meter calibration device 17, the switching valve 9 installed at the inlet of the return water line 21 may be controlled to be closed, and the switching valve 9' installed at the inlet of the weighing tank 7 may be controlled to be opened; in case of liquid flowing into the return pipe 21, the switching valve 9 installed at the inlet of the return pipe 21 may be controlled to be opened, and the switching valve 9' installed at the inlet of the weighing tank 7 may be controlled to be closed.
In an exemplary embodiment of the present embodiment, the server 13 establishes an electrical connection with the first NI communication device 10, and the opening and closing of the two switching valves 9, 9' may be controlled by the server 13 commanding the first NI communication device 10.
In one illustrative embodiment of this embodiment, DN200 standard meter pipeline 14 is connected in parallel with DN50 standard meter pipeline 18; the standard meter calibration device 17 is connected in parallel with the return line 21 so that a parallel system can be constituted. In the system, each standard table pipeline is required to be arranged into a complete path and can be independently operated without mutual influence; each reference meter pipeline constitutes an independent loop, and each reference meter pipeline is controlled by the control system in the server 13, so that the calibration process of any one pipeline is not affected by errors generated by other pipelines. The control system running on the server 13 is typically a program running in real time, containing control logic and various real-time communication devices, so both the memory performance and storage performance of the server 13 need to be configured to accommodate the control system. The system composition ensures that the response time of each pipeline control can be ensured, and more importantly, conditions are provided for the higher-level and automatic unified management of the parallel flow meter calibration device consisting of multiple pipelines.
The above is merely an exemplary embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Flowmeter calibrating device characterized in that, includes:
the system comprises a first NI communication device (10), a second NI communication device (11), a server (13), a main pipeline (19), a water storage device (1), a water pump (2) and a DN50 standard meter pipeline (18) which are sequentially arranged on the main pipeline (19), wherein the detected flow meter (4) can be arranged on the main pipeline (19);
wherein,
the water inlet end of the main pipeline (19) is connected to the water outlet end of the water storage device (1), and the water return end of the main pipeline (19) is connected to the water inlet end of the water storage device (1);
the first NI communication device (10) is electrically connected to the water pump (2) for controlling the water pump (2) to regulate the flow rate of liquid stored in the water storage device (1) from the water outlet end of the water storage device (1) into the main pipeline (19);
the DN50 standard meter pipeline (18) comprises at least one standard flow meter (3), the at least one standard flow meter (3) is a DN50 standard flow meter and is used for detecting a flow speed signal of the liquid flowing through the DN50 standard meter pipeline (18) under the condition that the flow speed is 4 to 40 cubic meters per hour;
the second NI communication means (11) is electrically connected to the at least one standard flow meter (3) for acquiring the flow rate signals from the at least one standard flow meter (3); and
the server (13) is electrically connected to the second NI communication device (11) for calibrating the flow meter (4) under test according to the flow rate signal.
2. The flowmeter prover device of claim 1 wherein the DN50 prover line (18) further includes two butterfly valves (15, 16) mounted in series across the at least one prover (3) for enabling or disabling the DN50 prover line (18).
3. The flow meter prover device of claim 2 further comprising: a third NI communication device (12) electrically connected to the butterfly valve (15, 16) for controlling the butterfly valve (15, 16) to activate the DN50 reference meter pipeline (18) to flow the liquid through the DN50 reference meter pipeline (18) if the flow rate is 4 to 40 cubic meters per hour, otherwise controlling the butterfly valve (15, 16) to close the DN50 reference meter pipeline (18) to prevent the liquid from flowing through the DN50 reference meter pipeline (18).
4. The flow meter calibration device according to any one of claims 1 to 3,
the at least one standard flowmeter (3) comprises two standard flowmeters (3) which are arranged in series, and each standard flowmeter (3) respectively outputs the flow speed signal; and
the server (13) averages the flow speed signals output by the two standard flowmeters (3) which are installed in series respectively, and calibrates the detected flowmeter (4) according to the average value of the flow speed signals.
5. The flowmeter calibration device according to claim 4, further comprising at least one DN200 standard meter pipeline (14), wherein the at least one DN200 standard meter pipeline (14) is connected in parallel with the DN50 standard meter pipeline (18) and then connected in series on the main pipeline (19), and is used for detecting the average value of the flow speed signal flowing through the at least one DN200 standard meter pipeline (14) for calibrating the tested flowmeter (4) under the condition that the flow speed is more than 40 cubic meters per hour.
6. A flow meter calibration device according to any of the claims 1-3, characterized in that it further comprises a control valve (5), said control valve (5) being mounted in series on said main pipeline (19) between said water inlet end of said water storage device (1) and said tested flow meter (4) and being electrically connected to said first NI communication device (10), said control valve (5) being adapted to regulate the liquid pressure of said main pipeline (19) under the control of said first NI communication device (10).
7. The flow meter calibration device of claim 6,
the main line (19) comprises a return line (21) between the water inlet end of the water storage device (1) and the control valve (5);
the flow meter calibration device further comprises a standard meter calibration device (17) connected between the control valve (5) and the water storage device (1) and in parallel with the return line (21) for calibrating the at least one standard flow meter (3) according to a weighing method.
8. The flowmeter calibration device according to claim 7, characterized in that the standard meter calibration device (17) comprises a weighing tank (7) for calibrating the at least one standard flowmeter (3) in dependence on the mass of the liquid flowing into the weighing tank (7).
9. The flow meter calibration device according to claim 8, characterized in that the standard meter calibration device (17) further comprises a diverter (6) mounted at the water inlet of the weighing tank (7) for controlling whether the liquid flows into the water storage device (1) via the weighing tank (7).
10. The flow meter calibration device according to claim 8 or 9, further comprising two switching valves (9, 9') respectively mounted at the water inlet of the weighing tank (7) and on the water return line (21) and electrically connected to the first NI communication device (10) for switching the flow direction of the liquid between the standard meter calibration device (17) and the water return line (21) under the control of the first NI communication device (10).
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| CN201721420724.7U CN207317905U (en) | 2017-10-30 | 2017-10-30 | Flowmeter calibrating installation |
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| CN201721420724.7U CN207317905U (en) | 2017-10-30 | 2017-10-30 | Flowmeter calibrating installation |
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| CN109116819A (en) * | 2018-08-09 | 2019-01-01 | 安徽省法米特物联技术有限公司 | A kind of Internet of Things big data acquisition processing system |
| CN109143996A (en) * | 2018-08-09 | 2019-01-04 | 安徽省法米特物联技术有限公司 | A kind of Internet of Things big data acquisition processing system that can ensure product quality |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109116819A (en) * | 2018-08-09 | 2019-01-01 | 安徽省法米特物联技术有限公司 | A kind of Internet of Things big data acquisition processing system |
| CN109143996A (en) * | 2018-08-09 | 2019-01-04 | 安徽省法米特物联技术有限公司 | A kind of Internet of Things big data acquisition processing system that can ensure product quality |
| CN109708728A (en) * | 2018-12-11 | 2019-05-03 | 广州能源检测研究院 | A kind of movable type mass flowmenter on-line calibration device and method |
| WO2020258284A1 (en) * | 2019-06-28 | 2020-12-30 | 深圳市大疆创新科技有限公司 | Flowmeter calibration system, method and apparatus, and storage medium |
| CN110346019A (en) * | 2019-08-01 | 2019-10-18 | 郑州拽亘电子科技有限公司 | A kind of water ga(u)ge calibration method of building element testing machine |
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| CN111324153B (en) * | 2020-02-28 | 2023-05-26 | 老肯医疗科技股份有限公司 | Flow monitoring device and flow monitoring method |
| CN112611437A (en) * | 2020-12-28 | 2021-04-06 | 南京应诺测控技术有限公司 | Pulse data merging system and method |
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