CN211317478U - Mobile online flowmeter calibration device - Google Patents
Mobile online flowmeter calibration device Download PDFInfo
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- CN211317478U CN211317478U CN202020315003.5U CN202020315003U CN211317478U CN 211317478 U CN211317478 U CN 211317478U CN 202020315003 U CN202020315003 U CN 202020315003U CN 211317478 U CN211317478 U CN 211317478U
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Abstract
The utility model provides a portable online flowmeter calibration equipment wholly uses the cabinet body that the bottom was equipped with the truckle as the carrier, and the structure is: a water outlet at the bottom of the water storage tank is connected with a water outlet pipeline, a gear pump, a pressure gauge, an electric three-way valve A and a standard mass flowmeter are sequentially arranged on the water outlet pipeline, a pipe end is connected with an inlet end auxiliary pipe of the online flowmeter through a hose A, a throttling valve is connected on the gear pump in parallel, and the other outlet of the electric three-way valve A is connected to a self-circulation backflow port of the water storage tank through a self-circulation backflow pipeline; the utility model discloses a check-up backflow pipeline, including on-line flow meter, hose B, check-up backflow pipeline, electronic three-way valve B, weighing pipe, weighing water tank, electronic scale bearing in the bottom of weighing water tank, hose B, electric three-way valve B, check-up backflow pipeline, electronic scale, water tank, water. The utility model discloses can provide two kinds of calibration methods of comparison and weighing method, the flexibility is strong, conveniently carries out online calibration to online flowmeter.
Description
Technical Field
The utility model relates to a measuring equipment field, the more specifically portable online flowmeter calibration equipment that says so.
Background
In tobacco processing plants, the tobacco processing plant and the power plant have a large number of mass flow meters and electromagnetic flow meters which need to be calibrated periodically, and which need to be removed for each calibration and sent to a specialized metering mechanism for calibration and verification. On-site on-line calibration is also adopted, and the on-site on-line calibration generally adopts a comparison method and a weighing method; when a comparison method is adopted, the difference of the caliber measuring ranges of the standard flowmeter and the online flowmeter affects the comparison precision, an electronic scale and a timer are generally used for field calibration, a pipeline and an associated control system which are connected with the online flowmeter are required to be used, and field manual timing is required during calibration; the mode that the electronic scale was weighed can produce some great measuring errors in the measurement process, hardly adjusts the flow range of discharge simultaneously, can't carry out full-scale calibration to the flowmeter linearity.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving above-mentioned technical problem to a certain extent at least. For this, the utility model provides a portable online flowmeter calibration equipment can provide the comparison and two kinds of calibration methods of the method of weighing, and the flexibility is strong, conveniently carries out online calibration to online flowmeter.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a portable online flowmeter verifying attachment which structural feature is:
the inlet side and the outlet side of the main pipe section where the online flowmeter is located are respectively provided with a first manual stop valve, an inlet end auxiliary pipe and an outlet end auxiliary pipe are respectively led out of the main pipe section between the first manual stop valves at two sides and the online flowmeter, and the auxiliary pipes at two ends are respectively provided with a second manual stop valve;
the movable online flowmeter calibration device integrally takes a cabinet body with casters at the bottom as a carrier, and comprises an electric control system, a monitoring operation screen, a water storage tank, a gear pump, a frequency converter, a throttle valve, a pressure gauge, an electric three-way valve A, a standard mass flowmeter, an electric three-way valve B, a weighing water tank, an electronic scale, a hose A and a hose B;
the water storage tank is provided with a water filling port, a drain outlet at the bottom is externally connected with a drain pipe, a drain stop valve is arranged on the drain pipe, a water outlet at the bottom of the water storage tank is connected with a water outlet pipeline, the water outlet pipeline is sequentially provided with the gear pump, the pressure gauge, the electric three-way valve A and the standard mass flowmeter along the liquid flow direction, the pipe end is detachably connected with the inlet end auxiliary pipe through a hose A, the throttle valve is arranged between the inlet and the outlet of the gear pump in parallel, and the other outlet of the electric three-way valve A is connected to a self-circulation return port of;
the pipe end of the outlet end auxiliary pipe is detachably connected with a check return pipeline through the hose B, the check return pipeline is provided with the electric three-way valve B, the pipe end is connected to a check return port of the water storage tank, the other outlet of the electric three-way valve B is connected to a sampling port of the weighing water tank through a weighing pipeline, and the electronic scale is supported at the bottom of the weighing water tank;
the monitoring operation screen is used for setting the frequency of the frequency converter and the flow value of the standard mass flowmeter, and is provided with a system starting button, a comparison calibration button, a weighing starting button and a weighing calibration button;
the electric control system is used for correspondingly controlling the electric three-way valve A and the electric three-way valve B to switch the flow direction of liquid flow according to the received button signals of the monitoring operation screen, controlling the rotating speed of the gear pump through the frequency converter according to the frequency set by the received monitoring operation screen, and receiving signals of the online flowmeter, the standard mass flowmeter and the electronic scale for analysis and comparison.
The utility model discloses a structural feature also lies in:
the water storage capacity of the water storage tank is more than 25 liters.
The hose A and the end of the inlet end auxiliary pipe and the end of the water outlet pipeline, and the hose B and the end of the outlet end auxiliary pipe and the end of the check backflow pipeline are detachably connected through clamp type quick connectors.
A pair of directional trundles and a pair of universal trundles with brakes are arranged at four corners of the bottom of the cabinet body.
Compared with the prior art, the utility model discloses beneficial effect embodies:
the utility model discloses can realize the on-the-spot online calibration to the on-line flow meter of different bores, different ranges to possess and compare calibration and two kinds of calibration functions of the calibration of weighing, simplified calibration operation difficulty, improved the operating efficiency, the flexibility is strong, and easy to carry out has improved measurement accuracy, and measuring range is wide.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic structural diagram of the outline structure and the position distribution of some important devices of the present invention;
FIG. 3 is a schematic diagram of the right side view of FIG. 2;
fig. 4 is a left side view of the structure of fig. 2.
In the figure, 1 gear pump; 2, a throttle valve; 3, a pressure gauge; 4, an electric three-way valve A; 5 standard mass flow meter; 6, an electric three-way valve B; 7, a water storage tank; 8, a sampling port; 9 weighing the water tank; 10 electronic scales; 11 clamp type quick coupler; 12 a hose A; 13 a hose B; 14 an on-line flow meter; 15 a first manual stop valve; 16 a second manual stop valve; 17 a water injection port; 18 a self-circulating return port; 19 checking a return port; 20 a sewage draining outlet; 21 a drain pipe; 22 a drain stop valve; 23 an outlet conduit; 24 a self-circulating return line; 25 checking the return pipeline; 26 weighing the pipe; 27 inlet end auxiliary pipe; 28 outlet end auxiliary pipes; 29 cabinet body; 30 directional caster wheels; 31 universal caster wheels with brakes; 32 a handle; 33 monitoring the operation screen; 34 an electronic control system; 35 main tube section.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 to 4, the mobile online flowmeter verification apparatus of the present embodiment is structurally configured as follows:
a first manual stop valve 15 is arranged on the inlet side and the outlet side of the online flowmeter 14 of the main pipe section 35 where the online flowmeter 14 is arranged, an inlet end auxiliary pipe 27 and an outlet end auxiliary pipe 28 are respectively led out of the main pipe section between the first manual stop valves 15 on the two sides and the online flowmeter 14, and second manual stop valves 16 are arranged on the auxiliary pipes on the two ends;
the movable online flowmeter 14 checking device integrally takes a cabinet body 29 with casters arranged at the bottom as a carrier, and comprises an electric control system 34, a monitoring operation screen 33, a water storage tank 7, a gear pump 1, a frequency converter, a throttle valve 2, a pressure gauge 3, an electric three-way valve A4, a standard mass flowmeter 5, an electric three-way valve B6, a weighing water tank 9, an electronic scale 10, a hose A12 and a hose B13;
a water filling port 17 is arranged on the water storage tank 7, a drain outlet 20 at the bottom is externally connected with a drain pipe 21, a drain stop valve 22 is arranged on the drain pipe 21, a water outlet at the bottom of the water storage tank 7 is connected with a water outlet pipeline 23, a gear pump 1, a pressure gauge 3, an electric three-way valve A4 and a standard mass flowmeter 5 are sequentially arranged on the water outlet pipeline 23 along the liquid flow direction, the pipe end is detachably connected with an inlet end auxiliary pipe 27 through a hose A12, a throttle valve 2 is arranged between the inlet and the outlet of the gear pump 1 in parallel, and the other outlet of the electric three-way valve A4 is connected to a self;
the pipe end of the outlet end auxiliary pipe 28 is detachably connected with the check return pipeline 25 through a hose B13, an electric three-way valve B6 is installed on the check return pipeline 25, the pipe end is connected to a check return port 19 of the water storage tank 7, the other outlet of the electric three-way valve B6 is connected to a sampling port 8 of the weighing water tank 9 through a weighing pipeline 26, and the electronic scale 10 is supported at the bottom of the weighing water tank 9;
the monitoring operation screen is used for setting the frequency of the frequency converter and the flow value of the standard mass flowmeter 5, and is provided with a system starting button, a comparison calibration button, a weighing starting button and a weighing calibration button;
the electronic control system 34 is used for correspondingly controlling the electric three-way valve A4 and the electric three-way valve B6 to switch the flow direction of liquid flow according to the received button signals of the monitoring operation panel, controlling the rotating speed of the gear pump 1 through the frequency converter according to the frequency set by the received monitoring operation panel, and receiving the signals of the online flowmeter 14, the standard mass flowmeter 5 and the electronic scale 10 for analysis and comparison. The on-line flow meter 14, the proof mass flow meter 5, the electronic scale 10 and the frequency converter are in data communication with the electronic control system 34 via a network.
In specific implementation, the corresponding structural arrangement also includes:
the water storage quantity of the water storage tank 7 is more than 25 liters. The accuracy grade of the standard mass flowmeter 5 and the electronic scale 10 is above 0.1 grade.
The hose A12 and the end of the inlet auxiliary pipe 27 and the outlet pipe 23, and the hose B13 and the end of the outlet auxiliary pipe 28 and the check return pipe 25 are detachably connected through a clamp type quick coupler 11.
A pair of directional casters 30 and a pair of universal casters with brake 31 are mounted at four corners of the bottom of the cabinet body 29, a handle 32 is further arranged on the cabinet body 29, and the pair of universal casters with brake 31 is mounted on one side close to the handle 32.
In fig. 2 to 4, in order to show the structure of the device more clearly, the water storage tank 7, the blow-down valve 8, the weighing water tank 9, the electronic scale 10, the frequency converter, the electronic control system 34, the monitoring operation screen 33, the two casters with brake 31 and the handle 32 are omitted in fig. 2; in fig. 3, a throttle valve 2, a pressure gauge 3, an electric three-way valve B6, a blowoff valve 8, a weighing water tank 9, an electronic scale 10, a directional caster 30, and a caster 31 with a brake are omitted; in fig. 4, the gear pump 1, the throttle valve 2, the pressure gauge 3, the electric three-way valve B6, one directional caster 30, and one braking caster 31 are omitted.
The device has the following three working modes:
1. self-circulation system
After the power is switched on, the system starting button is pressed on the monitoring operation screen 33, the electric control system 34 controls the electric three-way valve A4 to be switched to a state that the gear pump 1 is communicated with the water storage tank 7, the frequency converter is controlled according to the received frequency converter frequency set by the monitoring operation screen 33, and the gear pump 1 is controlled by the frequency converter to run at a corresponding rotating speed. The circulating water pumped out from the water storage tank 7 by the gear pump 1 flows through the electric three-way valve a4 and directly returns to the water storage tank 7 through the self-circulation return line. The throttle valve 2 arranged on the water outlet pipeline 23 is used for adjusting the water flow at the outlet of the gear pump 1 and preventing the frequency converter from running at a low frequency lower than 10Hz, and the pressure gauge 3 is used for monitoring the pipeline pressure.
2. Calibration by comparison
Before comparison and calibration, firstly, the accumulated pulse signals of the online flowmeter 14 are accessed into a PLC high-speed counting module of the electronic control system 34, and the input pulse signals are counted through the PLC high-speed counting module to obtain the accumulated quantity of the online flowmeter 14;
closing two first manual stop valves 15 on the inlet side and outlet side main pipe sections of the on-line flowmeter 14, opening a second manual stop valve 16 on the inlet side auxiliary pipe 27 and the outlet side auxiliary pipe 28, respectively connecting the water outlet pipe 23 with the inlet side auxiliary pipe 27 through a hose A12 and connecting the check return pipe 25 with the outlet side auxiliary pipe 28 through a hose B13 by using a clamp type quick coupler 11;
the flow value flowing through the standard mass flowmeter 5 is set on the monitoring operation screen 33, and when the comparison start button is pressed, the electronic control system 34 controls the electric three-way valve A4 to be switched to the position where the gear pump 1 is communicated with the standard mass flowmeter 5, and controls the electric three-way valve B6 to be switched to the position where the on-line flowmeter 14 is communicated with the water storage tank 7. The water flow pumped by the gear pump 1 from the water storage tank 7 flows back to the water storage tank 7 through an electric three-way valve A4, a standard mass flow meter 5, a hose A12, a second manual stop valve 16 at the inlet end, an online flow meter 14, a second manual stop valve 16 at the outlet end, a hose B13 and an electric three-way valve B6 in sequence;
the electronic control system 34 controls the frequency of the frequency converter through the PID closed loop according to the received real-time water flow value of the standard mass flowmeter 5, so as to control the rotation speed of the gear pump 1 through the frequency converter, thereby controlling the water flow value of the standard mass flowmeter 5 to reach the flow value preset on the monitoring operation screen 33. When the water flow reaches the set flow value steady state, starting a comparison calibration button of the monitoring operation screen 33, starting the electronic control system 34 to calculate the accumulated amount of the water flowing through the standard mass flowmeter 5 and the online flowmeter 14, stopping comparison when the preset accumulated amount of the water is reached, and recovering the system to the self-circulation state after the verification is stopped;
the above operation is repeated a plurality of times as required for the calibration of the flowmeter, and it is judged whether the accuracy of the on-line flowmeter 14 is within the error range by comparing the error between the average of the cumulative amounts of the standard mass flowmeter 5 and the average of the cumulative amounts of the on-line flowmeter 14.
3. Calibration by weighing method
Before weighing and calibrating, the cumulant pulse signals of the online flowmeter 14 are accessed into a PLC high-speed counting module of the electric control system 34, and the PLC high-speed technical module of the electric control system 34 counts the input pulse signals to obtain the cumulant of the online flowmeter 14;
the first manual cut-off valve 15 is closed and the second manual cut-off valve 16 is opened. The water flow rate value through the standard mass flowmeter 5 is preset on the monitor operation panel 33. When the weighing start button is pressed, the electronic control system 34 controls the electric three-way valve a4 to switch to a position where the gear pump 1 communicates with the standard mass flow meter 5, and controls the electric three-way valve B to switch to a position where it communicates with the weighing water tank 9. The water flow pumped by the gear pump 1 from the water storage tank 7 sequentially flows into the weighing water tank 9 through an electric three-way valve A4, a standard mass flowmeter 5, a hose A12, a second manual stop valve 16 at the inlet end, an online flowmeter 14, a second manual stop valve 16 at the outlet end, a hose B13 and an electric three-way valve B6, an electronic scale 10 at the bottom of the weighing water tank 9 carries out real-time dynamic weighing, and feeds back a weighed real-time weight value to an electronic control system 34;
the electronic control system 34 controls the frequency of the frequency converter through the PID closed loop according to the received real-time water flow value of the standard mass flowmeter 5, so as to control the rotation speed of the gear pump 1 through the frequency converter, thereby controlling the water flow value of the standard mass flowmeter 5 to reach the flow value preset on the monitoring operation screen 33. When the water flow reaches the set flow value steady state, a weighing calibration button of the monitoring operation screen 33 is started, the electronic control system 34 starts to calculate the accumulated amount of the flowing water of the electronic scale 10 and the online flowmeter 14, and the calculation is stopped when the set accumulated amount of the flowing water is reached. After the verification is stopped, the system is restored to a self-circulation state;
in order to improve the measurement accuracy, the above operation is repeated a plurality of times, and it is judged whether the accuracy of the on-line flowmeter 14 is within the error range by comparing the error between the average value of the weight of the water weighed by the electronic scale 10 and the average value of the cumulative amount of water of the on-line flowmeter 14.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (4)
1. A portable online flowmeter verifying unit, characterized by:
the inlet side and the outlet side of the main pipe section where the online flowmeter is located are respectively provided with a first manual stop valve, an inlet end auxiliary pipe and an outlet end auxiliary pipe are respectively led out of the main pipe section between the first manual stop valves at two sides and the online flowmeter, and the auxiliary pipes at two ends are respectively provided with a second manual stop valve;
the movable online flowmeter calibration device integrally takes a cabinet body with casters at the bottom as a carrier, and comprises an electric control system, a monitoring operation screen, a water storage tank, a gear pump, a frequency converter, a throttle valve, a pressure gauge, an electric three-way valve A, a standard mass flowmeter, an electric three-way valve B, a weighing water tank, an electronic scale, a hose A and a hose B;
the water storage tank is provided with a water filling port, a drain outlet at the bottom is externally connected with a drain pipe, a drain stop valve is arranged on the drain pipe, a water outlet at the bottom of the water storage tank is connected with a water outlet pipeline, the water outlet pipeline is sequentially provided with the gear pump, the pressure gauge, the electric three-way valve A and the standard mass flowmeter along the liquid flow direction, the pipe end is detachably connected with the inlet end auxiliary pipe through a hose A, the throttle valve is arranged between the inlet and the outlet of the gear pump in parallel, and the other outlet of the electric three-way valve A is connected to a self-circulation return port of;
the pipe end of the outlet end auxiliary pipe is detachably connected with a check return pipeline through the hose B, the check return pipeline is provided with the electric three-way valve B, the pipe end is connected to a check return port of the water storage tank, the other outlet of the electric three-way valve B is connected to a sampling port of the weighing water tank through a weighing pipeline, and the electronic scale is supported at the bottom of the weighing water tank;
the monitoring operation screen is used for setting the frequency of the frequency converter and the flow value of the standard mass flowmeter, and is provided with a system starting button, a comparison calibration button, a weighing starting button and a weighing calibration button;
the electric control system is used for correspondingly controlling the electric three-way valve A and the electric three-way valve B to switch the flow direction of liquid flow according to the received button signals of the monitoring operation screen, controlling the rotating speed of the gear pump through the frequency converter according to the frequency set by the received monitoring operation screen, and receiving signals of the online flowmeter, the standard mass flowmeter and the electronic scale for analysis and comparison.
2. The mobile online flowmeter verification device of claim 1, wherein: the water storage capacity of the water storage tank is more than 25 liters.
3. The mobile online flowmeter verification device of claim 1, wherein: the hose A and the end of the inlet end auxiliary pipe and the end of the water outlet pipeline, and the hose B and the end of the outlet end auxiliary pipe and the end of the check backflow pipeline are detachably connected through clamp type quick connectors.
4. The mobile online flowmeter verification device of claim 1, wherein: a pair of directional trundles and a pair of universal trundles with brakes are arranged at four corners of the bottom of the cabinet body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020315003.5U CN211317478U (en) | 2020-03-14 | 2020-03-14 | Mobile online flowmeter calibration device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020315003.5U CN211317478U (en) | 2020-03-14 | 2020-03-14 | Mobile online flowmeter calibration device |
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| CN211317478U true CN211317478U (en) | 2020-08-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111174876A (en) * | 2020-03-14 | 2020-05-19 | 安徽中烟工业有限责任公司 | Mobile online flowmeter calibration device |
| EP4227650A4 (en) * | 2021-09-24 | 2024-05-29 | Contemporary Amperex Technology Co., Limited | Measurement assembly and measurement tool |
-
2020
- 2020-03-14 CN CN202020315003.5U patent/CN211317478U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111174876A (en) * | 2020-03-14 | 2020-05-19 | 安徽中烟工业有限责任公司 | Mobile online flowmeter calibration device |
| CN111174876B (en) * | 2020-03-14 | 2024-07-05 | 安徽中烟工业有限责任公司 | Mobile online flowmeter calibration device |
| EP4227650A4 (en) * | 2021-09-24 | 2024-05-29 | Contemporary Amperex Technology Co., Limited | Measurement assembly and measurement tool |
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