Flowmeter calibration device

Abstract

The utility model discloses a flowmeter calibration device which comprises a bottom platform, a water tank is installed on the bottom platform, a circulation pipeline is arranged on one side of the water tank, a speed regulating pump is connected to the circulation pipeline, a standard flowmeter and a calibrated flowmeter are sequentially connected to the circulation pipeline, and a quick connector is arranged on the circulation pipeline. The calibrated flowmeter is communicated with the quick connector of the circulating pipeline through the quick chuck interface; the distribution box provides power for the speed regulating pump and the standard flowmeter, the speed regulating pump sucks liquid in the water tank, and the liquid flows through the standard flowmeter and the calibrated flowmeter in sequence through the circulating pipeline and then returns to the water tank. When the flow meter calibration device is applied, the calibrated flow meter only needs to be disassembled from an original pipeline system to be quickly assembled with a circulating pipeline, signal acquisition equipment, connected with the calibrated flow meter in the original system, of the calibrated flow meter does not need to be disassembled, risks caused by disassembly and reinstallation are avoided, the complexity of disassembly, carrying and external calibration is avoided, meanwhile, the downtime is shortened, and the working efficiency is improved. And the calibration efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flowmeter calibration technical field, specifically designs a flowmeter calibration device. BACKGROUND

[0002] Flowmeter is an important instrument for directly measuring fluid mass flow, widely used in petroleum chemical industry, energy measurement, food medicine and other fields. Its measurement precision directly affects the control efficiency of production process and product quality. However, flowmeter will cause measurement error due to environmental factors, medium characteristics or long-term wear during use, so it needs to be calibrated regularly to ensure its accuracy.

[0003] At present, the existing flowmeter calibration device has the following problems:

[0004] 1. Calibration needs to be disassembled and sent out: the traditional calibration method usually needs to disassemble the flowmeter from the pipeline system, and send it to the laboratory or special calibration equipment for calibration. This process not only consumes time and effort, but also may cause damage or performance degradation of the flowmeter due to disassembly and reinstallation.

[0005] 2. Poor adaptability: when sent to professional institutions for calibration, the calibration personnel may adjust the original parameters (such as zero point, range, etc.) of the flowmeter, resulting in mismatch between the flowmeter after reinstallation and the actual working condition, and further causing measurement error.

[0006] 3. Cannot realize online calibration: sending out calibration cannot be calibrated in the actual running environment of the flowmeter, resulting in deviation between the calibration result and the actual working condition, and cannot cover system error (such as pipeline vibration, fluid temperature change, pressure fluctuation, system line, etc.).

[0007] 4. Insufficient calibration precision of large and small range: sending out calibration usually uses a set of devices to cover large and small range, but due to the range and precision limitation of the device, it is difficult to meet the calibration requirements of high range and low range at the same time, resulting in that the calibration precision cannot be guaranteed. INVENTION CONTENTS

[0008] In order to solve the above problems in the prior art, the utility model provides a flowmeter calibration device, which can be quickly assembled and disassembled with the calibrated flowmeter, and improves the efficiency of online calibration of the calibrated flowmeter.

[0009] In order to realize the above technical purpose, the utility model adopts the technical scheme of:

[0010] A flow meter calibration device, comprising a bottom platform, a water tank is installed on the bottom platform, a circulating pipeline is arranged on one side of the water tank, a speed regulating pump is connected to the circulating pipeline, the circulating pipeline comprises a first branch, a standard flow meter and a calibrated flow meter are sequentially connected to the first branch, a quick connector is arranged on the circulating pipeline, the calibrated flow meter is communicated with the quick connector of the circulating pipeline through a quick mounting chuck interface, and a switch valve is arranged on the first branch; a distribution box is further arranged, and the distribution box provides power supply for the speed regulating pump and the standard flow meter; the speed regulating pump sucks liquid in the water tank, and the liquid flows through the standard flow meter and the calibrated flow meter in sequence through the circulating pipeline and then returns to the water tank.

[0011] As a preferred technical scheme, a pressure gauge and a thermometer are further arranged on the circulating pipeline, and are used for observing the pressure and the temperature of circulating liquid flow.

[0012] As a preferred technical scheme, the speed regulating pump is a constant-pressure variable-frequency pump.

[0013] As a preferred technical scheme, an adjusting hand valve is further arranged on the circulating pipeline, and the adjusting hand valve is located at an outlet end of the speed regulating pump.

[0014] As a preferred technical scheme, the circulating pipeline further comprises a second branch, the second branch is connected to the outlet end of the speed regulating pump at a starting point, the second branch is communicated with the water tank at a terminal point, a second standard flow meter and a second calibrated flow meter are sequentially connected to the second branch, a switch valve is arranged on the second branch, and the second branch and the first branch are arranged on two sides of the water tank.

[0015] As a preferred technical scheme, the range of the second standard flow meter is different from that of the standard flow meter.

[0016] As a preferred technical scheme, a pressure gauge and a thermometer are arranged on the second branch.

[0017] As a preferred technical scheme, a quick release support is arranged on an outer side wall of the water tank, and the quick release support is used for mounting the calibrated flow meter.

[0018] As a preferred technical scheme, the water tank, the circulating pipeline, the bottom platform and the support are made of SUS304 stainless steel.

[0019] As a preferred technical scheme, rollers are arranged at four corners of the bottom platform.

[0020] The flow meter calibration device has the following beneficial effects:

[0021] The flowmeter calibration device has the online calibration function: online calibration is supported, the calibrated flowmeter only needs to be disassembled from the original pipeline system, the signal acquisition equipment connected with the calibrated flowmeter in the original system does not need to be disassembled, quick assembly is realized through the quick disassembly chuck interface and the circulating pipeline, the risk caused by disassembly and reinstallation is avoided, the cumbersome disassembly and transportation of the external calibration are avoided, meanwhile, downtime is reduced, and calibration efficiency is improved.

[0022] The flowmeter calibration device can cover system errors: the flowmeter calibration device is calibrated in the actual operation environment of the calibrated flowmeter, system errors (such as pipeline vibration, fluid temperature change, pressure fluctuation, system line and the like) can be covered, and the calibration result is more accurate and reliable.

[0023] The flowmeter calibration device has multi-range high-precision calibration: the flowmeter calibration device is designed in a multi-range mode, can cover the calibration requirement of large and small ranges, and ensures the calibration precision in each range through a high-precision sensor, and solves the problem of insufficient precision in the large and small range calibration of the traditional device.

[0024] The flowmeter calibration device integrates the constant pressure variable frequency pump and the adjusting hand valve double regulation mechanism, guarantees the flow stability, can monitor the working condition parameters in real time through the pressure gauge and the thermometer, and effectively covers the system errors.

[0025] The flowmeter calibration device has the circulating water flow system, reduces the water consumption and wastewater discharge, and is suitable for the industrial production site environment. The calibration efficiency can be improved obviously, the labor and time cost is reduced, and the flowmeter calibration requirement of the petroleum chemical industry, the medicine and the like can be met. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as a limitation on the scope, and for the ordinary skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0027] Figure 1 It is the overall structure schematic view of the embodiment of the present application.

[0028] The figure mark: 1-water tank, 2-calibrated flowmeter, 3-distribution box, 4-circulating pipeline, 5-standard flowmeter, 6-speed regulating pump, 7-adjusting hand valve, 8-bottom platform, 9-pressure gauge, 10-thermometer, 11-second standard flowmeter, 12-second calibrated flowmeter, 13-quick disassembly support. DETAILED DESCRIPTION

[0029] To make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0030] A flow meter calibration device, as shown in the figure, comprises a bottom platform 8, a water tank 1 is installed on the bottom platform 8, a circulating pipeline 4 is arranged on one side of the water tank 1, a speed regulating pump 6 is connected to the circulating pipeline 4, the circulating pipeline 4 comprises a first branch, a standard flow meter 5 and a calibrated flow meter 2 are connected to the first branch in sequence, a quick connector is arranged on the circulating pipeline 4, the calibrated flow meter 2 is communicated with the quick connector of the circulating pipeline 4 through a quick mounting chuck interface, and a switch valve is arranged on the first branch. Figure 1 A distribution box 3 is further arranged, the distribution box 3 provides power supply for the speed regulating pump and the standard flow meter, the speed regulating pump 6 sucks liquid in the water tank 1, and the liquid flows through the standard flow meter 5, the calibrated flow meter 2 in sequence through the circulating pipeline 4, and then returns to the water tank 1, and a pressure gauge 9 and a thermometer 10 are further arranged on the circulating pipeline 4, which are used for observing the pressure and temperature of circulating liquid flow, so as to correct the measurement data in real time, ensure that the calibration result reflects the real flow state, and is not affected by working condition fluctuation.

[0031] Preferably, the speed regulating pump 6 is a constant pressure variable frequency pump, which can control the flow by frequency conversion under the condition of maintaining constant pressure. Further, an adjusting hand valve 7 is further arranged on the circulating pipeline 4, and the adjusting hand valve 7 is located at the outlet end of the speed regulating pump 6. In special cases, when the constant pressure variable frequency pump cannot realize accurate flow, the adjusting hand valve can be used to fine tune the flow, so that the flow reaches the vicinity of the calibration point.

[0032] Further, the circulation pipeline 4 further comprises a second branch, the starting point of the second branch is connected with the outlet end of the speed regulating pump 6, the ending point of the second branch is communicated with the water tank 1, a second standard flowmeter 11 and a second calibrated flowmeter 12 are sequentially connected on the second branch, a switch valve is arranged on the second branch and used for switching the fluid passage, and the second branch is arranged on the two sides of the water tank 1 apart from the first branch. Preferably, the range of the second standard flowmeter 11 is different from that of the standard flowmeter 2, and the range of the second calibrated flowmeter 12 is different from that of the calibrated flowmeter 5. Through the multi-range design, the calibration requirements of large and small ranges can be covered, the calibration accuracy in each range can be ensured through the high-precision sensor, and the problem of insufficient accuracy in the calibration of large and small ranges in the traditional device is solved.

[0033] The outer side wall of the water tank 1 is provided with quick-release supports 13, and the two ends of the calibrated flowmeter 2, the standard flowmeter 5, the second calibrated flowmeter 12 and the second standard flowmeter 11 are respectively mounted on the quick-release supports 13. The calibrated flowmeter 2 and the second calibrated flowmeter 12 are respectively communicated with the circulation pipeline 4 through quick plug connectors. Preferably, the quick-release supports 13 are provided with U-shaped clamping grooves, and the two ends of the calibrated flowmeter 2 are mounted in the U-shaped clamping grooves of the quick-release supports 13.

[0034] Preferably, the water tank 1, the circulation pipeline 4, the bottom platform 8 and the supports 13 are all made of SUS304 stainless steel. The bottom platform 8 is provided with rollers at four corners of the bottom, so that the device can be conveniently transported to a required position.

[0035] When it is necessary to calibrate the flowmeter on site, the device is moved to the calibration site, the calibrated flowmeter 2 is dismounted from the working condition site by an operator, is mounted on the quick-release support 13 on the corresponding side of the water tank according to the use range, and is connected with the circulation pipeline 4 through the quick plug connector. The power supply of the calibration device distribution box 3 is turned on, sufficient water is added into the water tank 1, the switch valve on the circulation pipeline 4 is adjusted, the speed regulating pump 6 is started, the frequency is adjusted to ±5% of the target flow value through the frequency converter, and then the calibrated flowmeter is finely adjusted to the calibration point through the adjusting hand valve 7. Then, the calibrated flowmeter can be calibrated according to the flowmeter calibration process.

[0036] The device can quickly dismount and mount the calibrated flowmeter, connects the calibrated flowmeter to the circulation pipeline or the original system through the quick plug connector, avoids the cumbersome dismounting and transporting of the device, does not need to dismount the signal acquisition equipment connected with the calibrated flowmeter in the original system, can cover the system error, and does not need to change the parameters of the flowmeter.

[0037] Of course, the utility model can also have other various embodiments, and the skilled in the art can make various corresponding changes and deformations according to the utility model without departing from the spirit and essence of the utility model, but these corresponding changes and deformations should all belong to the protection scope of the claims attached to the utility model.

Claims

1. A flowmeter calibration device, characterized in that: The system includes a bottom platform on which a water tank is installed. A circulation pipeline is provided on one side of the water tank, and a speed-regulating pump is connected to the circulation pipeline. The circulation pipeline includes a first branch, on which a standard flow meter and a flow meter to be calibrated are connected in sequence. The circulation pipeline is equipped with a quick-connect connector, and the flow meter to be calibrated is connected to the quick-connect connector of the circulation pipeline through a quick-release chuck interface. A switch valve is provided on the first branch. The system also includes an electrical distribution box, which provides power to the speed-regulating pump and the standard flow meter. The speed-regulating pump draws liquid from the water tank, which flows through the circulation pipeline, passing sequentially through the standard flow meter and the flow meter to be calibrated, before returning to the water tank.

2. The flowmeter calibration device according to claim 1, characterized in that: Pressure gauges and thermometers are also installed on the circulation pipeline to observe the pressure and temperature of the circulating fluid.

3. The flowmeter calibration device according to claim 1, characterized in that: The speed-regulating pump is a constant-pressure variable frequency pump.

4. The flowmeter calibration device according to claim 3, characterized in that: The circulation pipeline is also equipped with a regulating hand valve, which is located at the outlet end of the speed regulating pump.

5. The flowmeter calibration device according to claim 1, characterized in that: The circulation pipeline also includes a second branch. The starting point of the second branch is connected to the outlet end of the speed regulating pump, and the ending point of the second branch is connected to the water tank. A second standard flow meter and a second calibrated flow meter are connected in sequence on the second branch. A switch valve is provided on the second branch. The second branch and the first branch are located on opposite sides of the water tank.

6. The flowmeter calibration device according to claim 5, characterized in that: The range of the second standard flow meter differs from that of the standard flow meter.

7. The flowmeter calibration device according to claim 5, characterized in that: Pressure gauges and thermometers are installed on the second branch.

8. The flowmeter calibration device according to claim 1, characterized in that: The water tank is equipped with a quick-release bracket on its outer wall, which is used to install the flow meter being calibrated.

9. The flowmeter calibration device according to claim 8, characterized in that: The water tank, circulation pipes, bottom platform, and support are made of polished SUS304 stainless steel.

10. The flowmeter calibration device according to claim 9, characterized in that: The bottom platform is equipped with rollers at its four corners.

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