CN211978053U - Flowmeter calibrating device - Google Patents
Flowmeter calibrating device Download PDFInfo
- Publication number
- CN211978053U CN211978053U CN202020831200.2U CN202020831200U CN211978053U CN 211978053 U CN211978053 U CN 211978053U CN 202020831200 U CN202020831200 U CN 202020831200U CN 211978053 U CN211978053 U CN 211978053U
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- China
- Prior art keywords
- water pump
- meter
- frequency converter
- motor
- input end
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 15
- 238000012795 verification Methods 0.000 claims abstract description 13
- 238000005303 weighing Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- Measuring Volume Flow (AREA)
Abstract
A flowmeter calibrating device, in particular to a device capable of generating variable flow calibrating test for a flowmeter. The method can solve the problem of constant flow verification of the traditional flowmeter and realize variable flow verification. The water pump comprises a water pump, a voltage and current stabilizing device, a water pump motor and a standard meter, wherein a motor shaft of the water pump motor is connected with the water pump, the water outlet of the water pump is communicated with the input end of the detected meter through the voltage and current stabilizing device, and the output end of the detected meter is communicated with the input end of the standard meter; the water pump motor power supply system further comprises a first frequency converter, wherein the output end of the first frequency converter is connected with the power supply input end of the water pump motor. The detected meter and the standard meter are connected in series at the water outlet end of the voltage-stabilizing and current-stabilizing device, a detection worker adjusts and controls the rotating speed of a water pump motor through a first frequency converter in a manual setting mode, and further adjusts and controls the water outlet flow of the water pump, so that the flow of the detected meter is dynamically changed, the detected meter gives a flow value under an unstable flow condition, and the standard meter verifies whether the detected meter is qualified or not.
Description
Technical Field
The utility model relates to a calibrating installation of flowmeter, concretely relates to can produce the device of unsteady flow volume examination test to the flowmeter.
Background
With the development of various national industries, the demand of water resources is increasing. The water conservation and consumption reduction, the fine management of water resources are urgent, and the requirement on the metering performance of the flowmeter is higher and higher. The responsibility of the national metrological department is also increasing. In the traditional flowmeter calibrating device, the calibration of the flowmeter is implemented by only carrying out metrological calibration on a plurality of flow points according to the requirements of related national metrological calibration regulations, and in the calibration process, the flow fluctuation of each flow point needs to be stabilized within 1%. And the flow meter can be determined to be qualified as long as the verification result meets the requirements of the verification regulation. The flow field in the pipeline is very complex in the field of flowmeter installation, the flow rate is changed frequently, and the flow field state is not ideal in a laboratory. Therefore, the flow field state that the device can change in real time in the flow environment of the installation site needs to be considered, whether the flowmeter can still meet the accuracy requirement specified by the verification regulation of the related national flow meter or not is detected, and the device has practical significance.
SUMMERY OF THE UTILITY MODEL
The utility model provides a calibrating installation of flowmeter not only can solve traditional flowmeter constant current flow examination problem, also can realize the unsteady flow examination simultaneously.
The water pump comprises a water pump 1, a voltage and current stabilizing device 2, a water pump motor 3 and a standard meter 7, wherein a motor shaft of the water pump motor 3 is connected with an input shaft of the water pump 1, a water outlet end of the water pump 1 is communicated with a water inlet end of the voltage and current stabilizing device 2, a water outlet end of the voltage and current stabilizing device 2 is communicated with an input end of a to-be-detected meter 6, and an output end of the to-be-detected meter 6 is communicated with an input end of the standard; the water pump motor further comprises a first frequency converter 4, wherein the input end of the first frequency converter 4 is connected with a mains supply power grid 5, and the output end of the first frequency converter 4 is connected with the power input end of the water pump motor 3. In the verification working process, the to-be-detected meter 6 and the standard meter 7 are connected in series at the water outlet end of the voltage-stabilizing and current-stabilizing device 2, a verification worker adjusts and controls the rotating speed of the water pump motor 3 through the first frequency converter 4 in a manual setting mode, further adjusts and controls the water outlet flow of the water pump 1, accordingly, the flow of the to-be-detected meter 6 is changed dynamically, the to-be-detected meter 6 gives a flow value under an unstable flow condition, and the standard meter 7 verifies whether the flow is qualified or not. The utility model discloses simple structure, the reliable operation can provide constant current and unsteady flow parameter condition for flow instrument examination work in real time.
Drawings
Fig. 1 is a schematic structural view of a first embodiment of the present invention, and fig. 2 is a schematic structural view of a second embodiment.
Detailed Description
The first embodiment is as follows: this embodiment is explained with reference to fig. 1. The water pump comprises a water pump 1, a voltage and current stabilizing device 2, a water pump motor 3, a first frequency converter 4 and a standard meter 7, wherein a motor shaft of the water pump motor 3 is connected with an input shaft of the water pump 1, a water outlet end of the water pump 1 is communicated with a water inlet end of the voltage and current stabilizing device 2, a water outlet end of the voltage and current stabilizing device 2 is communicated with an input end of a to-be-detected meter 6, and an output end of the to-be-detected meter 6 is communicated with an input end of the standard; the input end of the first frequency converter 4 is connected with a mains supply power grid 5, and the output end of the first frequency converter 4 is connected with the power input end of the water pump motor 3.
The pressure and flow stabilizing device 2 is a closed tank body, and can eliminate bubbles in water to stabilize the pressure in the tank.
In addition, it may also comprise weighing means 8. The output end of the standard meter 7 is communicated with a capacity tank of the weighing device 8. The method is set to meet the verification requirements of a standard table method and a quality method.
In this specification, the "meter to be tested" is an abbreviation for a meter of the flow rate to be tested; the standard meter is short for the standard flow meter.
The second embodiment is as follows: the present embodiment will be specifically described below with reference to fig. 2. This embodiment is further explained and defined on the basis of the first embodiment. In the embodiment, the weighing device further comprises a computer 10, a second frequency converter 11, a motor 12, a worm 13, a turbine 14 and a gate valve 15, wherein a control signal output end of the computer 10 is connected with a control signal input end of the second frequency converter 11, a power supply input end of the second frequency converter 11 is connected with a commercial power grid 5, a power supply output end of the second frequency converter 11 is connected with a power supply input end of the motor 12, a motor shaft of the motor 12 is connected with a worm shaft of the worm 13, the worm 13 is meshed with the turbine 14, a turbine shaft 14-1 of the turbine 14 is coaxially connected with a valve rod 15-1 of the gate valve 15, a water inlet end of the gate valve 15 is communicated with an output end of a standard meter 7, and a water outlet end of the gate valve 15. The turbine shaft 14-1 is connected with a valve rod 15-1 of the gate valve 15 through a coupling 16.
During operation, as shown in fig. 2, a computer 10 stores various signals, such as control signals of square waves or sine waves, etc., a verification worker selects one signal through a man-machine interface of the computer 10, outputs the signal to a second frequency converter 11, acts on a valve rod 15-1 of a gate valve 15 through a worm and turbine mechanism, changes the opening degree of a valve core in the gate valve 15 according to the signal, thereby changing the flow rate of the device, and simulates the actual working state of the to-be-detected meter 6, so as to verify whether the to-be-detected meter meets the national verification regulation requirements under the condition.
The water pump in the first embodiment adjusts the flow rate through the pressure stabilizing and flow stabilizing device 2, so that the response is slower and the adjustment is more indirect. The flow regulation of the embodiment directly acts on the detected meter 6, and the combination of the flow regulation and the detected meter has the macroscopic characteristic of water pump regulation and the microscopic and direct characteristics of movable valve core 12 regulation, so that the simulation of the actual working state of the detected meter 6 can be met. The flow can be automatically adjusted between (30-100)% by the flow limiting function of the gate valve 15.
The rest is the same as the first embodiment.
Claims (5)
1. The flowmeter calibrating device comprises a water pump (1), a pressure and current stabilizing device (2), a water pump motor (3) and a standard meter (7), wherein a motor shaft of the water pump motor (3) is connected with an input shaft of the water pump (1), a water outlet end of the water pump (1) is communicated with a water inlet end of the pressure and current stabilizing device (2), a water outlet end of the pressure and current stabilizing device (2) is communicated with an input end of a to-be-detected meter (6), and an output end of the to-be-detected meter (6) is communicated with an input end of the standard meter (7); the water pump motor is characterized by further comprising a first frequency converter (4), wherein the input end of the first frequency converter (4) is connected with a mains supply power grid (5), and the output end of the first frequency converter (4) is connected with the power input end of the water pump motor (3).
2. The flowmeter verification device as claimed in claim 1, wherein the pressure and flow stabilizing device (2) is a closed tank.
3. The flowmeter calibrating device as set forth in claim 2, further comprising a weighing device (8), wherein the output end of the reference meter (7) is communicated with the capacity tank of the weighing device (8).
4. Flowmeter verification device according to claim 1, 2 or 3, characterized in that it further comprises a computer (10), a second frequency converter (11), the intelligent weighing device comprises a motor (12), a worm (13), a turbine (14) and a gate valve (15), wherein the control signal output end of a computer (10) is connected with the control signal input end of a second frequency converter (11), the power input end of the second frequency converter (11) is connected with a mains supply power grid (5), the power output end of the second frequency converter (11) is connected with the power input end of the motor (12), the motor shaft of the motor (12) is connected with the worm shaft of the worm (13), the worm (13) is meshed with the turbine (14), the turbine shaft (14-1) of the turbine (14) is coaxially connected with the valve rod (15-1) of the gate valve (15), the water inlet end of the gate valve (15) is communicated with the output end of a standard meter (7), and the water outlet end of the gate valve (15) is communicated with a capacity tank.
5. The flowmeter verification device as claimed in claim 4, wherein the turbine shaft (14-1) is connected to the valve stem (15-1) of the gate valve (15) by a coupling (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020831200.2U CN211978053U (en) | 2020-05-18 | 2020-05-18 | Flowmeter calibrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020831200.2U CN211978053U (en) | 2020-05-18 | 2020-05-18 | Flowmeter calibrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211978053U true CN211978053U (en) | 2020-11-20 |
Family
ID=73370809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020831200.2U Expired - Fee Related CN211978053U (en) | 2020-05-18 | 2020-05-18 | Flowmeter calibrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211978053U (en) |
-
2020
- 2020-05-18 CN CN202020831200.2U patent/CN211978053U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201120 |