Flowmeter calibration device

Abstract

The utility model relates to a flowmeter calibration device which comprises a mobile carrier, a pump set, a liquid storage tank, a standard flowmeter, a liquid balance pipe and a calibrated flowmeter, the standard flowmeter, the liquid balance pipe and the calibrated flowmeter are arranged at the upper end of the mobile carrier, and the pump set and the liquid storage tank are arranged in the mobile carrier. An inlet of the pump set is connected with an outlet of the liquid storage tank through a pipeline, an outlet of the pump set is connected with an inlet of the standard flowmeter through an outlet pipeline, an outlet of the standard flowmeter is connected with an inlet of the liquid balance pipe, an outlet of the liquid balance pipe is connected with an inlet of the calibrated flowmeter, and an outlet of the calibrated flowmeter is connected with the liquid storage tank through a pipeline. And a flow regulating valve is arranged at the outlet of the calibrated flowmeter. The flow calibration device has the advantages that the device is small in size, containerized, convenient to move and carry, flexible and convenient to disassemble and assemble and accurate in calibration, the flow calibration device can be moved, the calibration work of the flow meter is rapidly and efficiently completed, and the problem that the inspection calibration period of the flow meter in an oil and gas industry station is long is solved.

Description

Technical Field

[0001] The utility model relates to the field of flow meter calibration, in particular to a flow meter calibration device. Background Art

[0002] At present, small turbine flowmeters, mass flowmeters and other types are used in process pipelines in oil and gas pipeline enterprises and other industries. Flowmeters need to be calibrated regularly. Generally, the flowmeter is removed from the process equipment or system device used, and the flowmeter is replaced by a short circuit and sent to a qualified relevant verification or calibration agency for offline verification or calibration. The specific method is: remove the flowmeter from the process equipment or system device, send it to the relevant agency for verification or calibration, retrieve the flowmeter by logistics mail, and install it on the process equipment or system device.

[0003] The existing calibration method has the following technical problems:

[0004] ① The inspection period of the flow meter is long, and the on-site supporting process equipment system cannot fully perform the operation inspection data, and the equipment cannot be fully operated;

[0005] ② The flow meter needs to be dismantled and installed twice before it can be inspected and reinstalled, which increases the workload of maintenance personnel;

[0006] ③ The flow meter is easily damaged during the logistics inspection process, which leads to more equipment failures and increases the risk of equipment failure;

[0007] ④ Sending the equipment to a calibration company requires additional postage, calibration fees, processing short-circuiting, and increased equipment maintenance costs.

[0008] In addition, even after being sent to a calibration agency, it may not be able to be calibrated completely according to the metering fluid medium actually used. Differences in the operating environment will cause the calibration results to not truly reflect the flow value error when the flow meter measures the actual liquid.

[0009] Based on the above reasons, it is absolutely necessary to provide a flow calibration device that is compact in structure, easy to assemble and disassemble, accurately calibrated, and movable, so as to quickly and efficiently complete the flow meter calibration work. Utility Model Content

[0010] The technical problem to be solved by the utility model is to provide a flow meter calibration device, which effectively overcomes the defects of the prior art.

[0011] The technical solution of the utility model to solve the above technical problems is as follows:

[0012] A flowmeter calibration device comprises a mobile carrier, a pump group, a liquid storage tank, a standard flowmeter, a liquid balance tube and a calibrated flowmeter, wherein the standard flowmeter, the liquid balance tube and the calibrated flowmeter are arranged at the upper end of the mobile carrier, the pump group and the liquid storage tank are arranged in the mobile carrier, the inlet of the pump group is connected to the outlet of the liquid storage tank through a pipeline, the outlet of the pump group is connected to the inlet of the standard flowmeter through an outlet pipeline, the outlet of the standard flowmeter is connected to the inlet of the liquid balance tube, the outlet of the liquid balance tube is connected to the inlet of the calibrated flowmeter, the outlet of the calibrated flowmeter is connected to the liquid storage tank through a pipeline, and a flow regulating valve is arranged at the outlet of the calibrated flowmeter.

[0013] On the basis of the above technical solution, the present invention can also be improved as follows.

[0014] Furthermore, the outlet of the liquid storage tank is connected to a water outlet pipe, the inlet of the pump group is connected to a water inlet pipe, the inlet pipe port and the outlet pipe port are respectively provided with a first flange, and the first flanges are fitted together and connected by bolts; the outlet pipeline comprises a short pipe, a bent pipe, a straight pipe and a first inlet pipeline, one end of the short pipe and one end of the bent pipe are respectively provided with a second flange, and the second flanges are fitted together and connected by bolts, the other end of the short pipe is connected to the outlet of the pump group, the other end of the bent pipe is connected to one end of the straight pipe through an elbow, the other end of the straight pipe is connected to one end of the first inlet pipeline through an elbow, the other end of the first inlet pipeline and the inlet of the standard flow meter are respectively provided with a third flange, and the second flanges are fitted together and connected by bolts; the outlet of the standard flow meter is connected to the outlet of the pump group through the third flange. An outlet pipeline is connected to the inlet of the above-mentioned liquid balance pipe, and the outlet of the above-mentioned standard flowmeter and the port of the first outlet pipeline are respectively provided with a fourth flange, and the fourth flanges are fitted together and connected by bolts; the inlet of the above-mentioned calibrated flowmeter is connected to the outlet of the above-mentioned liquid balance pipe through the second inlet pipeline, and the inlet of the above-mentioned calibrated flowmeter and the port of the second inlet pipeline are respectively provided with a fifth flange, and the fifth flanges are fitted together and connected by bolts; the outlet of the above-mentioned calibrated flowmeter is connected to one end of the transition pipe through the second outlet pipeline, and the outlet of the above-mentioned calibrated flowmeter and the port of the second outlet pipeline are respectively provided with a sixth flange, and the sixth flanges are fitted together and connected by bolts; the other end of the above-mentioned transition pipe extends vertically downward, and is connected to the above-mentioned liquid storage tank through a drain pipe, and the above-mentioned second outlet pipeline is provided with the above-mentioned flow regulating valve.

[0015] Furthermore, the first inlet pipeline, the first outlet pipeline, the second inlet pipeline and the second outlet pipeline are respectively fixed to the upper end of the mobile carrier through brackets.

[0016] Furthermore, the above-mentioned bracket includes a support column, and the upper end of the above-mentioned support column is provided with an arc-shaped pipe support with an open upper end, and the upper end of the above-mentioned pipe support is buckled with an arc-shaped pressure ring with an open lower end, and the two ends of the above-mentioned pressure ring are respectively connected to the two ends of the above-mentioned pipe support with bolts, and the corresponding pipeline is clamped between the above-mentioned pressure ring and the pipe support.

[0017] Furthermore, the first outlet pipeline is detachably connected in series with a connecting pipe, and a pressure gauge is connected to the connecting pipe.

[0018] Furthermore, the mobile carrier includes a rectangular upper table, a lower table and four columns. The upper table is arranged above the lower table. The four columns are respectively vertically and spaced apart and connected between the edges of the upper table and the lower table. The lower ends of the columns extend downward and are connected to walking wheels. The pump group and the liquid storage tank are installed on the lower table. The standard flow meter, liquid balance pipe and calibrated flow meter are installed on the upper end of the upper table.

[0019] Furthermore, a drawer that can be pulled out toward one side is provided at the lower end of the upper table top.

[0020] Furthermore, the pump group is a variable frequency pump group, and the pump group is connected to a frequency converter.

[0021] Furthermore, it also includes a calibration metering controller, which is connected to the standard flow meter and the calibrated flow meter respectively.

[0022] Furthermore, a liquid discharge port with a valve is provided at the bottom of the liquid storage tank.

[0023] The beneficial effects of the utility model are: simple and compact structural design, small containerized device, convenient movement and transportation, easy disassembly and assembly, accurate calibration, and movable flow calibration device, which can quickly and efficiently complete the flow meter calibration work, and is very suitable for use in flow meter calibration work in similar industries, and solves the problem of long inspection and calibration cycle of flow meters in oil and gas industry stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view structural schematic diagram of the flow meter calibration device of the utility model;

[0025] Figure 2 It is a schematic diagram of the top view of the flow meter calibration device of the utility model.

[0026] Figure 3 It is a side structural schematic diagram of the flow meter calibration device of the utility model.

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 1. Mobile carrier; 2. Pump group; 3. Liquid storage tank; 4. Standard flow meter; 5. Liquid balance pipe; 6. Calibrated flow meter; 7. Flow regulating valve; 9. Pressure gauge; 10. Calibration metering controller; 11. Upper table; 12. Lower table; 13. Column; 14. Travel wheel; 15. Drawer; 21. Frequency converter; 31. Drain port; 81. Short pipe; 82. Bend pipe; 83. Straight pipe; 84. First inlet pipeline. DETAILED DESCRIPTION

[0029] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0030] Example: Figure 1 , 2 As shown in Figure 3, the flowmeter calibration device of this embodiment includes a mobile carrier 1, a pump group 2, a liquid storage tank 3, a standard flowmeter 4, a liquid balance tube 5 and a calibrated flowmeter 6, the standard flowmeter 4, the liquid balance tube 5 and the calibrated flowmeter 6 are arranged at the upper end of the mobile carrier 1, the pump group 2 and the liquid storage tank 3 are arranged in the mobile carrier 1, the inlet of the pump group 2 is connected to the outlet of the liquid storage tank 3 through a pipeline, the outlet of the pump group 2 is connected to the inlet of the standard flowmeter 4 through an outlet pipeline, the outlet of the standard flowmeter 4 is connected to the inlet of the liquid balance tube 5, the outlet of the liquid balance tube 5 is connected to the inlet of the calibrated flowmeter 6, the outlet of the calibrated flowmeter 6 is connected to the liquid storage tank 3 through a pipeline, and a flow regulating valve 7 is provided at the outlet of the calibrated flowmeter 6.

[0031] When flow meter calibration is required, the specific process is as follows:

[0032] The first step is to prepare for the flow meter calibration device. The flow meter calibration device is transported to the station that needs to be calibrated by using the movable characteristics of the mobile carrier 1, and is stably placed at the target location; a certain amount of water or other liquid is added to the liquid storage tank 3, and the calibrated flow meter 6 and pipeline are installed;

[0033] The second step is to carry out the calibration work, start the pump group 2 to pressurize the liquid to flow through the pipeline, cooperate with the flow control valve 7 to adjust the flow of different sizes, measure the metering data of the standard flow meter 4 and the calibrated flow meter 6, and realize the comparative calibration of the metering data of the calibrated flow meter 6. During the calibration, the pressure in the pipeline is monitored;

[0034] After the flowmeter is calibrated in the third step, the calibrated flowmeter 6 is disassembled, the liquid in the liquid storage tank 3 is drained, and the entire device is moved back to the placement location.

[0035] The whole device has a simple and compact structure design. The device is small and containerized, which is convenient for moving and transporting. It is easy to assemble and disassemble, accurately calibrate, and is a mobile flow calibration device. It can quickly and efficiently complete the flow meter calibration work. It is very suitable for use in flow meter calibration work in similar industries, and solves the problem of long inspection and calibration cycle of flow meters in oil and gas industry stations.

[0036] As a preferred embodiment, the outlet of the liquid storage tank 3 is connected to a water outlet pipe, and the inlet of the pump group 2 is connected to a water inlet pipe (denoted by a in the figure), the inlet pipe port and the outlet pipe port are respectively provided with a first flange, and the first flanges are fitted together and connected by bolts; the outlet pipeline includes a short pipe 81, a curved pipe 82, a straight pipe 83 and a first inlet pipeline 84, one end of the short pipe 81 and one end of the curved pipe 82 are respectively provided with a second flange, and the second flanges are fitted together and connected by bolts, the other end of the short pipe 81 is connected to the outlet of the pump group 2, the other end of the curved pipe 82 is connected to one end of the straight pipe 83 through an elbow, and the other end of the straight pipe 83 is connected to one end of the first inlet pipeline 84 through an elbow, the other end of the first inlet pipeline 84 and the inlet of the standard flow meter 4 are respectively provided with a third flange, and the second flanges are fitted together and connected by bolts; the outlet of the standard flow meter 4 is connected to the upper The inlet of the liquid balance pipe 5, and the outlet of the standard flow meter 4 and the port of the first outlet pipeline are respectively provided with a fourth flange, and the fourth flanges are fitted together and connected by bolts; the inlet of the calibrated flow meter 6 is connected to the outlet of the liquid balance pipe 5 through the second inlet pipeline, and the inlet of the calibrated flow meter 6 and the port of the second inlet pipeline are respectively provided with a fifth flange, and the fifth flanges are fitted together and connected by bolts; the outlet of the calibrated flow meter 6 is connected to one end of the transition pipe through the second outlet pipeline (wherein, the port of the second outlet pipeline is connected to one end of the transition pipe through an elbow), the outlet of the calibrated flow meter 6 and the port of the second outlet pipeline are respectively provided with a sixth flange, and the sixth flanges are fitted together and connected by bolts; the other end of the transition pipe extends vertically downward and is connected to the liquid storage tank 3 through a drain pipe (wherein, the other end of the transition pipe is connected to one end of the drain pipe through an elbow), and the second outlet pipeline is provided with the flow regulating valve 7.

[0037] In the above embodiment, the pump group 2 is connected to the water inlet pipe and the elbow 82 by flanges, and the standard flow meter 4 and the calibrated flow meter 6 are also connected by flanges in the pipeline, which is conducive to the rapid disassembly and assembly of the three. The overall layout of the pipeline is relatively regular, the pipe layout space is compact, and the entire device is easy to miniaturize and integrate.

[0038] In this embodiment, the first inlet pipeline 84 , the first outlet pipeline, the second inlet pipeline and the second outlet pipeline are respectively fixed to the upper end of the mobile carrier 1 through brackets.

[0039] Specifically, the above-mentioned bracket (indicated by D in the figure) includes a support column, and the upper end of the above-mentioned support column is provided with an arc-shaped pipe support with an open upper end, and the upper end of the above-mentioned pipe support is buckled with an arc-shaped pressure ring with an open lower end, and the two ends of the above-mentioned pressure ring are respectively connected to the two ends of the above-mentioned pipe support with bolts, and the corresponding pipeline is clamped between the above-mentioned pressure ring and the pipe support.

[0040] In this embodiment, a connecting pipe is detachably connected in series with the first outlet pipeline, and a pressure gauge 9 is connected to the connecting pipe. The connecting pipe adopts a conventional three-way pipe fitting, and the pressure gauge 9 can monitor the pressure in the pipeline in real time and provide a reference indicator for calibration.

[0041] As a preferred embodiment, the mobile carrier 1 includes a rectangular upper table 11, a lower table 12 and four columns 13. The upper table 11 is arranged above the lower table 12. The four columns 13 are respectively vertically and spaced apart between the edges of the upper table 11 and the lower table 12. The lower ends of the columns 13 extend downward and are connected to walking wheels 14. The pump group 2 and the liquid storage tank 3 are installed on the lower table 12. The standard flow meter 4, the liquid balance pipe 5 and the calibrated flow meter 6 are installed on the upper end of the upper table 11.

[0042] In the above embodiment, the mobile carrier 1 adopts a double-layer frame structure, the upper and lower layers are arranged in a relatively compact structure, and the overall miniaturized design of the device is easy and flexible to carry and move.

[0043] The upper table 11 and the lower table 12 are preferably rectangular plate-shaped tables, connected to the columns 13 at four right angles. The running wheels 14 are running wheels with brakes or casters with locking structures (both are existing technologies, and the specific structures are not described in detail), which are convenient for locking after reaching the target position to avoid displacement during use.

[0044] In this embodiment, a notch groove (indicated by Q in the figure) is provided on the upper platform 11 for the transition pipe to pass through.

[0045] In this embodiment, a drawer 15 that is pulled out toward one side is provided at the lower end of the upper table 11. The drawer 15 can be designed as one or more as needed, and is mainly used to store measurement-related tools.

[0046] As a preferred implementation, the pump group 2 is a variable frequency pump group, and the pump group 2 is connected to a frequency converter 21 .

[0047] In the above implementation scheme, during use, the operating parameters of the variable frequency pump group can be adjusted by the frequency converter 21, and the flow regulating valve 7 can be used to accurately adjust flow rates of different sizes, thereby achieving accurate calibration of the flow meter.

[0048] As a preferred embodiment, it further comprises a calibration metering controller 10, and the calibration metering controller 10 is connected to the standard flow meter 4 and the calibrated flow meter 6 respectively.

[0049] In the above embodiment, the calibration metering controller 10 can receive the flow signal of the standard flow meter 4 and the flow signal of the calibrated flow meter 6 for calculation and calibration. The calibration metering controller 10 can be a conventional controller, mainly for data statistics and parameter comparison.

[0050] In this embodiment, the calibration metering controller 10, the pump group 2, the standard flowmeter 4 and the calibrated flowmeter 6 are respectively connected to a power supply, and can use 220V AC or 380V AC power supply.

[0051] In this embodiment, a drain port 31 with a valve is provided at the bottom of the liquid storage tank 3. After the flow meter is calibrated, all power supplies to the flow meter calibration device are disconnected, the calibrated flow meter 6 is disassembled, and the liquid in the liquid storage tank 3 is drained by opening the valve of the drain port 31.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0057] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A flow meter calibration device, characterized in that: The invention comprises a mobile carrier (1), a pump group (2), a liquid storage tank (3), a standard flow meter (4), a liquid balance tube (5) and a calibrated flow meter (6), wherein the standard flow meter (4), the liquid balance tube (5) and the calibrated flow meter (6) are arranged at the upper end of the mobile carrier (1), the pump group (2) and the liquid storage tank (3) are arranged in the mobile carrier (1), the inlet of the pump group (2) is connected to the outlet of the liquid storage tank (3) through a pipeline, the outlet of the pump group (2) is connected to the inlet of the standard flow meter (4) through an outlet pipeline, the outlet of the standard flow meter (4) is connected to the inlet of the liquid balance tube (5), the outlet of the liquid balance tube (5) is connected to the inlet of the calibrated flow meter (6), the outlet of the calibrated flow meter (6) is connected to the liquid storage tank (3) through a pipeline, and a flow regulating valve (7) is provided at the outlet of the calibrated flow meter (6).

2. A flow meter calibration device according to claim 1, characterized in that: The outlet of the liquid storage tank (3) is connected to a water outlet pipe, and the inlet of the pump group (2) is connected to a water inlet pipe. The water inlet pipe port and the water outlet pipe port are respectively provided with a first flange, and the first flanges are fitted together and connected by bolts; the outlet pipeline comprises a short pipe (81), a curved pipe (82), a straight pipe (83) and a first inlet pipeline (84), one end of the short pipe (81) and one end of the curved pipe (82) are respectively provided with a second flange, and the second flanges are fitted together and connected by bolts, the other end of the short pipe (81) is connected to the outlet of the pump group (2), the other end of the curved pipe (82) is connected to one end of the straight pipe (83) through an elbow, and the other end of the straight pipe (83) is connected to one end of the first inlet pipeline (84) through an elbow, the other end of the first inlet pipeline (84) and the inlet of the standard flow meter (4) are respectively provided with a third flange, and the second flanges are fitted together and connected by bolts; The outlet of the standard flowmeter (4) is connected to the inlet of the liquid balance pipe (5) through a first outlet pipeline, and the outlet of the standard flowmeter (4) and the port of the first outlet pipeline are respectively provided with a fourth flange, and the fourth flanges are fitted together and connected by bolts; the inlet of the calibrated flowmeter (6) is connected to the outlet of the liquid balance pipe (5) through a second inlet pipeline, and the inlet of the calibrated flowmeter (6) and the port of the second inlet pipeline are respectively provided with a fifth flange, and the fifth flanges are fitted together and connected by bolts; the outlet of the calibrated flowmeter (6) is connected to one end of a transition pipe through the second outlet pipeline, and the outlet of the calibrated flowmeter (6) and the port of the second outlet pipeline are respectively provided with a sixth flange, and the sixth flanges are fitted together and connected by bolts; the other end of the transition pipe extends vertically downward and is connected to the liquid storage tank (3) through a drain pipe, and the flow regulating valve (7) is provided on the second outlet pipeline.

3. A flow meter calibration device according to claim 2, characterized in that: The first inlet pipeline (84), the first outlet pipeline, the second inlet pipeline and the second outlet pipeline are respectively fixed to the upper end of the mobile carrier (1) through brackets.

4. A flow meter calibration device according to claim 3, characterized in that: The bracket includes a support column, the upper end of which is provided with an arc-shaped pipe support with an open upper end, the upper end of the pipe support is buckled with an arc-shaped pressure ring with an open lower end, the two ends of the pressure ring are respectively connected to the two ends of the pipe support by bolts, and a corresponding pipeline is clamped between the pressure ring and the pipe support.

5. A flow meter calibration device according to claim 2, characterized in that: The first outlet pipeline is detachably connected in series with a connecting pipe, and the connecting pipe is connected to a pressure gauge (9).

6. A flow meter calibration device according to claim 2, characterized in that: The mobile carrier (1) comprises a rectangular upper table (11), a lower table (12) and four columns (13); the upper table (11) is arranged above the lower table (12); the four columns (13) are respectively vertically and spaced apart and connected between the edges of the upper table (11) and the lower table (12); the lower ends of the columns (13) extend downward and are connected to running wheels (14); the pump group (2) and the liquid storage tank (3) are installed on the lower table (12); and the standard flow meter (4), the liquid balance pipe (5) and the calibrated flow meter (6) are installed on the upper end of the upper table (11).

7. A flow meter calibration device according to claim 6, characterized in that: The lower end of the upper tabletop (11) is provided with a drawer (15) which is drawn toward one side thereof.

8. A flow meter calibration device according to claim 1, characterized in that: The pump group (2) is a variable frequency pump group, and the pump group (2) is connected to a frequency converter (21).

9. A flow meter calibration device according to any one of claims 1 to 8, characterized in that: It also comprises a calibration metering controller (10), wherein the calibration metering controller (10) is respectively connected to the standard flow meter (4) and the calibrated flow meter (6).

10. A flow meter calibration device according to any one of claims 1 to 8, characterized in that: A liquid discharge port (31) with a valve is provided at the bottom of the liquid storage tank (3).

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