CN106153162B - Gas flow meter testing equipment - Google Patents

Abstract

The invention provides a gas flowmeter detection device, which comprises a gas transmission module, a plurality of valve group modules connected with the gas transmission module and a detection module connected with the valve group modules, wherein the detection module comprises a plurality of flowmeters to be detected, and the valve group modules are connected with the flowmeters to be detected in a one-to-one correspondence manner. The invention aims to provide a gas flowmeter detection device which can simulate different environmental conditions and simultaneously detect the application range and stability of a plurality of flowmeters.

Description

Gas flow meter testing equipment

technical field

The invention relates to the technical field of flowmeter detection, and more particularly, to a gas flowmeter detection device.

Background technique

With the large number of domestic gas meters put into use, the detection requirements of gas flow meters are also constantly increasing. However, the current measurement equipment integrating gas flow, temperature, pressure, gas composition and its related flow calculation and volume correction is not perfect.

Among the gas flowmeters, the measurement of the gas household flowmeter is a flowmeter with a small flow rate and a relatively large amplitude. Therefore, several parameters such as gas flow rate, temperature, pressure, and gas composition need to be measured when the flowmeter is detected, and then these measurement signals are used. Input to the flow computer or volume corrector, calculate and compensate according to the gas equation of flow calculation, and finally obtain the standard flow rate.

Detect the parameters such as volume flow, temperature, pressure, gas composition, etc. of the gas standard conditions in the flowmeter. Any inaccurate measurement of any of them will affect the accuracy of the flowmeter. At present, the influence of temperature, pressure and other factors is not considered in the domestic gas skin membrane meter. In fact, it is used for volume measurement under working conditions. However, how to calibrate the relevant flowmeter requires a stable and reliable device for calibration. Existing flowmeter testing equipment cannot simulate different environmental conditions to test the applicable range and stability of the flowmeter. And, generally, the existing flowmeter can only detect one flowmeter to be tested.

SUMMARY OF THE INVENTION

In view of the problems existing in the related art, the purpose of the present invention is to provide a gas flow meter detection device capable of simulating different environmental conditions and simultaneously detecting the applicable range and stability of multiple flow meters.

In order to achieve the above object, the present invention provides a gas flow meter detection device, including a gas transmission module, a plurality of valve group modules connected with the gas transmission module, and a detection module connected with the valve group module, wherein the detection module includes a plurality of valve group modules. The flowmeter to be measured, the valve group module and the flowmeter to be measured are connected in one-to-one correspondence.

According to an embodiment of the present invention, the gas delivery module includes a gas distribution module for accommodating the detection gas, and a pressurization module for pressurizing the detection gas, and the gas inlet of the pressurization module communicates with the gas outlet of the gas distribution module , the gas outlet of the pressurizing module is connected to the valve group module in one-to-one correspondence.

According to an embodiment of the present invention, the pressurizing module includes a chamber, and a self-weight sealing movable part for adjusting the pressure of the chamber, wherein the valve block module is connected with the chamber.

According to an embodiment of the present invention, a plurality of chambers in a pressurizing module and a self-weight sealing movable part for synchronously performing pressure regulation on all the chambers, wherein the chambers are connected with the valve group modules in a one-to-one correspondence.

According to an embodiment of the present invention, each chamber is provided with a self-weight sealing movable part, wherein the tops of all the self-weight sealing movable parts are connected to each other by connecting rods.

According to one embodiment of the invention, each chamber is configured as a flexible chamber, and all flexible chambers are pressure-regulated synchronously via a common self-weight sealing movable portion.

According to an embodiment of the present invention, the detection module includes a constant temperature cabinet, and the flowmeter to be measured is set in the constant temperature cabinet.

According to an embodiment of the present invention, it further includes a data analysis module and a data collection feedback module, wherein the data analysis module is configured to receive the data collected by the data collection feedback module and analyze the data to obtain the parameters of the flowmeter to be measured, the data The collection feedback module includes collecting the flow data of the valve group module, and also includes the component feedback module and the temperature and pressure feedback module. The component feedback module feeds back the gas components in the gas distribution module to the data analysis module; the temperature and pressure feedback module F will detect The temperature and pressure in the module are fed back to the data analysis module.

According to an embodiment of the present invention, each valve group module includes at least one valve branch pipe; at least one standard flow meter is set in the detection module or the valve branch pipe.

According to an embodiment of the present invention, at least one temperature and pressure sensor is respectively provided at the inlet and outlet of each flowmeter to be measured.

The beneficial technical effect of the present invention is:

In the gas flow meter detection device involved in the present invention, since multiple valve group modules are provided, multiple flow meters to be tested can be detected at the same time; Control the temperature, detect the flowmeter to be measured under different temperature conditions, and can realize the detection of different flowmeters under the same temperature condition; and provide a stable pressure detection gas through the gas transmission module, and can make the flowmeter to be measured in different The detection is carried out under the condition of detection gas pressure; in addition, the detection gas flow rate can be controlled by the valve group module to obtain the relevant parameters of the flowmeter to be measured under different flow rates.

Description of drawings

Fig. 1 is the schematic diagram of gas flowmeter detection equipment technological process flow of the present invention;

Fig. 2 is the schematic diagram of the embodiment gas flow meter detection equipment according to the embodiment 1 of the present invention;

3 is a schematic structural diagram of a pressurized tank according to an embodiment of the present invention;

4 is a schematic diagram of a gas flow meter detection device in Embodiment 2 of the present invention;

FIG. 5 is a schematic diagram of a gas flow meter detection device in Embodiment 3 of the present invention.

Detailed ways

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1 and FIG. 2 , Embodiment 1 of the present invention provides a gas flow meter detection device, including a gas transmission module T, a plurality of valve group modules E connected to the gas transmission module T, and a valve group module E connected to the gas transmission module T The connected detection module C, wherein the detection module C includes a plurality of flowmeters to be measured, and the valve group module E is connected to the flowmeters to be measured in one-to-one correspondence.

In the above embodiment, since multiple valve group modules E are provided, multiple flowmeters to be measured can be detected at the same time; in addition, the flow rate of the detected gas can also be controlled by the valve group module E, so as to obtain the flowmeters to be measured in different related parameters under the flow.

Further, according to an optional embodiment of the present invention, the gas transmission module T is connected to the valve group module E in a one-to-one correspondence, and each valve group module E includes at least one valve branch pipe.

According to an embodiment of the present invention, the gas delivery module T includes a gas distribution module A for accommodating the test gas, and a pressurization module B for pressurizing the test gas, the gas inlet of the pressurization module B and the gas distribution module The gas outlet of A is connected, and the gas outlet of the pressurizing module B is connected to the valve group module E in a one-to-one correspondence.

Further, in an optional embodiment, each valve group module E includes a valve branch pipe and a valve connected to the valve branch pipe. When the valve is opened, it is fully opened, and when it is closed, it is completely closed; Several valve branches connected in parallel with each other.

In some optional embodiments of the present invention, the detection module C includes a constant temperature cabinet 10 , and the flowmeter to be measured is arranged in the constant temperature cabinet 10 .

Further, the thermostatic cabinet 10 is provided with at least two flowmeters to be measured that are connected to the valve group module E in a one-to-one correspondence; at least one standard flowmeter is set in the detection module C or the valve branch pipe.

It should be noted that the provision of at least one standard flowmeter in the valve branch pipe means that in each valve block module E, at least one valve branch pipe is connected with a standard flowmeter in series. In addition, each valve group module is respectively connected with a different flowmeter to be measured.

It should be understood that the valve group module E is used to provide a stable gas flow for the flowmeter to be measured. Therefore, when closing the valve, it should be completely closed to prevent the gas to be measured from escaping, and when the valve is opened, the gas to be measured enters the flow to be measured. When timing, the valve should be fully opened, so that the gas flow in each valve branch pipe can be equivalent to the standard flow rate of the valve branch pipe, making the gas flow entering the flowmeter to be measured more accurate, and avoiding the incomplete opening of the valve. The accuracy of the gas flow rate of the meter.

In addition, in the above embodiment, by installing a plurality of flowmeters to be measured in the same constant temperature cabinet 10, the temperature can be controlled, the flowmeters to be measured can be detected under different temperature conditions, and the same temperature conditions can be The flowmeter is used for detection; and the gas transmission module A provides a stable pressure detection gas, and the flowmeter to be tested can be detected under different detection gas pressure conditions.

As shown in FIG. 4, FIG. 4 shows a schematic diagram of the gas flow meter detection device in Embodiment 2 of the fundamental invention. It should be understood that the difference between this embodiment and the previous embodiments is that the pressurizing module B includes a chamber 20 , and the self-weight sealing movable part 12 for adjusting the pressure of the chamber 20 , wherein the valve block module E is connected with the chamber 20 . Other identical components are not described here. It should also be understood that the various embodiments of the present invention do not exist independently, and the various embodiments may be combined and replaced with each other in any form.

Further, as shown in FIG. 4 , the gas distribution module A includes a bell 7 and at least one air bag 1 , wherein the gas outlet of the bell 7 is connected with the gas inlet of the pressurizing module B. As shown in FIG.

As shown in FIG. 5 , according to Embodiment 3 of the present invention, the pressurizing module B includes a plurality of chambers 20 , the self-weight sealing movable part 12 for synchronously adjusting the pressure of all the chambers 20 , wherein the gas of the bell jar The outlets are connected to the gas inlets of the chambers 20 in a one-to-one correspondence, wherein a plurality of the chambers 20 are connected to the valve group modules E in a one-to-one correspondence.

Further, as shown in FIG. 5 , the gas distribution module A includes at least two bells, and each bell is provided with at least one airbag 1 .

3 , according to an embodiment of the present invention, each chamber 20 is provided with a self-weight sealing movable part 12 respectively, wherein the tops of all the self-weight sealing movable parts 12 are connected to each other by connecting rods.

Alternatively, each chamber 20 is configured as a flexible chamber, and all flexible chambers are pressure regulated synchronously via a common deadweight seal mover 12 .

Further, according to an embodiment of the present invention, all the pressurized tanks 20 are configured as independent chambers, and the opening ends of each pressurized tank 20 are respectively provided with glands, wherein the tops of all the glands are connected to each other by connecting rods .

Alternatively, in another embodiment of the present invention, all pressurized tanks 20 are configured as independent flexible chambers, and all flexible chambers are squeezed via a common gland for simultaneous pressure regulation. In this way, the output pressures of the plurality of pressurized tanks 20 are adjusted simultaneously through the same set of self-weight sealing movable parts 12 . This can ensure that the output pressures of the respective pressurized storage tanks 20 are the same, that is, to ensure the detection of different components, temperatures and flow rates under the same pressure.

As shown in FIG. 2 , in Embodiment 1 of the present invention, the airbag 1 is provided inside the bell jar; or, in Embodiment 3 shown in FIG. 5 , the airbag 1 is provided outside the bell jar.

For example, in Embodiment 1 shown in FIG. 2 , the airbag 1 is disposed inside the bell 7 or 13 and connected to the pressurizing module B in parallel. Further, the airbag 1 may be provided with a gas release port to be connected to the bell 7 or 13 , and the gas in the airbag 1 may be transported to the bell 7 or 13 for storage. Alternatively, in Embodiment 3 as shown in FIG. 5 , the airbag 1 is connected to the pressurizing module B in series with the bell 7 or 13 . In an optional embodiment of the present invention, the gas flow meter detection device may include two air bags 1 connected to the bell 7 or 13 respectively. In the above embodiment, the proportioning can be carried out according to the composition ratio of the detected gas. After proportioning, the gas can directly enter the subsequent system (in the pressurizing module B), or can be temporarily stored in the bell 7 or 13 of the gas distribution module A.

As shown in FIGS. 2 to 5 , according to some embodiments of the present invention, the gas distribution module A includes at least two bells 7 and 13 , wherein the bells are connected to all the pressurized tanks 20 in a one-to-one correspondence. For example, in Embodiment 1 shown in FIG. 2 , the bell jar 7 and the bell jar 13 are connected to two pressurized tanks 20 , respectively. That is to say, the two pressurized tanks 20 are respectively connected to two independent branches, and during the experiment, different detection gases can be used to detect the same or different types of flowmeters to be tested.

As shown in FIG. 3 , in one embodiment of the present invention, the output pressures of a plurality of pressurized tanks 20 are adjusted simultaneously through the same set of self-weight sealing movable parts 12 . This can ensure that the output pressures of the respective pressurized storage tanks 20 are the same, that is, to ensure the detection of different components, temperatures and flow rates under the same pressure.

According to an embodiment of the present invention, each chamber 20 is provided with a discharge vent 21 that communicates with a one-to-one corresponding bell jar. In the event of a system failure, the test gas in the tank can be delivered to the bell through the discharge vent 21 .

According to an embodiment of the present invention, the gas outlet of the detection module C is connected to the gas storage tank 6 . In this way, the detection gas can enter the gas storage tank 6 for centralized collection and processing after passing through the detection module C.

Alternatively, in an embodiment of the present invention, the gas outlet of the detection module C may also communicate with the bell 7 and/or 13 . In this way, according to the specific situation, after passing through the detection module C, the detection gas can be returned to the bell 7 and or 13 of the gas distribution module A for continued experimental use. Further, the gas storage tank 6 may be configured to have at least two chambers, which are respectively connected with the bell 7 and the first valve group module and the bell 13 and the second valve group module.

It should be understood that, for example, in Embodiment 1 as shown in FIG. 2 , the bell jars may be constructed in multiple numbers to implement a multi-component comparison experiment. Alternatively, in Embodiment 2 as shown in FIG. 4 , a bell 7 can also be provided, which can realize a comparative experiment of multiple tables of the same gas composition.

As shown in FIG. 1, according to an embodiment of the present invention, it further includes a data analysis module D and a data collection feedback module, wherein the data analysis module D is used to receive the data collected by the data collection feedback module and analyze the data to obtain The parameters of the flowmeter to be measured, wherein the data collection feedback module includes the flow data of the valve group module E, and also includes the component feedback module G and the temperature and pressure feedback module F, wherein the component feedback module G will be in the gas distribution module A. The gas composition of the gas is fed back to the data analysis module D; the temperature and pressure feedback module F feeds back the temperature and pressure in the detection module C to the data analysis module D.

According to an embodiment of the present invention, the parameters include one or more of the flow range, pressure loss, flow range and accuracy of the flow rate fluctuation with temperature and pressure.

According to an embodiment of the present invention, each valve group module E includes at least one valve branch pipe; at least one standard flow meter is set in the detection module or the valve branch pipe.

According to an embodiment of the present invention, the valve group module E includes a valve branch pipe and a valve connected to the valve branch pipe. When the valve is opened, it is fully opened, and when it is closed, it is completely closed; the inlet and outlet of each flowmeter to be measured are respectively set at least A temperature pressure sensor.

That is to say, in the above-mentioned embodiment, along the flow direction of the gas to be measured, a temperature and pressure sensor, a flowmeter to be measured and another temperature and pressure sensor are connected in series in the constant temperature cabinet 10 in sequence. In this way, the temperature and pressure of the gas to be measured before and after entering the flowmeter to be measured can be measured by the temperature and pressure sensors located upstream and downstream of the flowmeter to be measured, and the pressure loss of the flowmeter to be measured can be obtained.

According to an embodiment of the present invention, the valve group module E includes a valve branch pipe 3 or 16 and a valve connected to the valve branch pipe 3 or 16. The valve is fully opened when it is opened, and fully closed when it is closed.

As shown in FIG. 2 , according to Embodiment 1 of the present invention, the flowmeter detection device at least includes: a first valve group module and a first flowmeter to be measured 5 connected to the first valve group module; and a second valve group module and The second flow meter 19 to be measured connected to the second valve group module. In this way, the detection gas output from the first valve group module enters the first flowmeter 5 to be measured through the temperature and pressure sensor 4, and is discharged from the detection module C through another temperature and pressure sensor 4; the detection gas output from the second valve group module passes through The temperature and pressure sensor 18 enters the second flowmeter to be measured 19 and exits the detection module C through another temperature and pressure sensor 18. The measurement processes of the two flowmeters to be measured are independent of each other and do not interfere with each other.

2 again, according to Embodiment 1, each valve group module E includes a valve branch pipe and a valve connected to the valve branch pipe, wherein a standard flowmeter is connected in series with the valve branch pipe of any valve group module E. In the above embodiment, the standard flowmeter is only connected in series in one valve branch pipe, and the other branches are calibrated according to the standard flowmeter, and different flow rates are detected by opening the valve during the test.

Further, the first valve group module includes a plurality of parallel first valve branch pipes 3, and one of the first valve branch pipes 3 is connected in series with a first standard flow meter 11; the second valve group module includes a plurality of parallel second valve branch pipes 16. One of the second valve branch pipes 16 is connected with a second standard flow meter 17 in series.

According to an optional embodiment of the present invention, the valve is configured as an explosion-proof pneumatic valve, the valve branch pipe is configured as a fixed pipeline, the flow rate passing through each valve group module E is fixed or measurable, and the fully open valve can be passed during the test. Realize the detection of different flow rates of the flowmeter to be measured.

In each experiment, according to the range and accuracy of the flowmeter to be tested, the valve branch pipe of the same type is installed in the valve group module E. In two experiments, the valve branch pipe installed in the valve group module E may be different, for example, the installation The valve branch flow can have 5m ³ /h, 1m ³ /h or more different flow. That is to say, in an experiment, the flow rates of the installed valve branch pipes are all the same. When the range and accuracy of the flowmeter to be measured change, the valve branch pipes with different flow rates can be replaced for the experiment.

According to an embodiment of the present invention, the gas distribution module A, the pressurization module B, the valve group module E and the detection module C are detachably connected. In this way, when some modules need to be cleaned or replaced, the modules to be replaced can be disassembled. In addition, the above modules can be selected and assembled according to the testing requirements. In one embodiment, the modules are connected by hoses and pipe clamps, and the air tightness of the equipment needs to be tested before each test.

As shown in FIG. 2 , according to Embodiment 1 of the present invention, the detection device is composed of two or more gas flowmeter detection devices for detecting a single gas flowmeter, so it is a matching device of the same type for different detection flowmeters. The detection gas can be configured with the detection gas of the same composition or with the detection gas of different components. When the detection gas of the same composition is configured, a bell jar can be used, and the air bag 1 can be input into the bell jar proportionally outside the bell jar. When configuring a multi-component gas, multiple bell jars are used for configuration, such as bell jars 7 and 13 as shown in FIG. 2 .

In the embodiment 2 shown in FIG. 4 , if the detection of multiple tables and the same components is performed, the detection gas configuration places a plurality of elemental airbags 1 into the bell 7 of the gas distribution module A, and each airbag 1 is equipped with an automatic adjustment valve, According to the gas composition requirements, open the valve of each air bag 1 to detect the gas. The composition of the gas prepared to be detected is known, and the gas may directly enter the pressurized tank 20 or be temporarily stored in the bell 7 .

After the detection gas is configured, open the valve 8, close the valves 9 and 15, the external force pulls the counterweight 2 of the self-weight sealing movable part 12 to suck the detection gas into the pressurized tank 20, and then close the valve 8, the gas distribution stage has been completed. The next step is to connect the measured flowmeter. After the constant temperature cabinet 10 is heated to the specified temperature, the system enters the detection mode. Open the valve 9 and the valve 15, if the components of the detected gas are the ones that have been used for the detection, the experimental detection can be carried out by using the valve branch flow of the known valve group module. If the component is not used, it can be measured through the valve branch pipe with the standard flow meter 11 on the branch pipe, and the other valve branch pipes can be calibrated. The detected gas enters the detection module C, and the detected gas is heated by the straight pipe at a constant temperature and then enters the flowmeters to be measured installed on the installation parts 5 and 19 of the flowmeters to be measured. The data is transmitted to the data analysis module D. The data analysis module D analyzes the collected data to obtain parameters such as the flow range, pressure loss, flow rate with temperature, pressure fluctuation range, and accuracy of the relevant flowmeter. The detected gas can be recovered into the gas storage tank 6 for centralized collection and processing.

In Embodiment 3 as shown in FIG. 5 , the gas detection device with different components can place the airbag 1 for gas distribution outside the bell 7 and the bell 13 . Here, the gas distribution of the bell 7 is introduced as an example.

Put a plurality of air bags 1 into the bell 7 of the gas distribution module A, each air bag 1 is equipped with an automatic adjustment valve, and opens the valves of the respective air bags 1 to detect the gas according to the gas composition requirements. When the composition of the detector is known, the gas can directly enter the pressurized tank 20 or be temporarily stored in the bell 7. The gas distribution process of the bell 13 is the same.

The pressurized tank 20 is a plurality of independent tanks when the gas composition is different, and the upper part of each tank is connected with the self-weight sealing movable part 12, that is, the operation of the self-weight sealing movable part 12 will act on each independent pressurized tank. 20. Inject the detection gas of different components into the subsequent system.

After the detection gas is configured, open the valve 8, the valve 14, close the valves 9 and 15, and the external force pulls the counterweight 2 of the self-weight sealing movable part 12 to suck the detection gas into the pressurized tank 20, and then close the valve 8 and the valve 14. The gas phase has been completed. The next step is to connect the measured flowmeter. After the constant temperature cabinet 10 is heated to the specified temperature, the system enters the detection mode. Beginning with valve 9 and valve 15, if the composition of the detected gas is the one used for testing, the known valve branch flow of the valve group module E can be used for experimental testing. If the component is not used, it can be measured through the valve branch with standard flow meters 11 and 17 on the valve branch and the other valve branch can be calibrated. The detection gas enters the detection module C, and the detection gas is heated by the straight pipe at a constant temperature and enters the flowmeter to be measured installed on the installation parts 5 and 19 of the flowmeter to be measured. During the experiment, the temperature and pressure sensor 4 and the temperature and pressure sensor 18 continue to The real-time data is transmitted to the data analysis module D. The data analysis module D analyzes the collected data to obtain parameters such as the flow range, pressure loss, flow rate with temperature, pressure fluctuation range, and accuracy of the relevant flowmeter. The detected gas can be recovered into the gas storage tank 6 for centralized collection and processing.

According to an embodiment of the present invention, natural gas is used as the detection gas, the air bag 1 of methane and nitrogen (carbon dioxide) can be used in the proportioning device, or the natural gas currently on the market can be directly used as the detection gas. The configuration gas methane or nitrogen is used here.

The configured natural gas is stored in the bell 7, and the other components of the equipment are connected to carry out air tightness inspection, and the flowmeter to be measured (household gas meter) is installed after passing the test. Start to heat up the constant temperature cabinet to 20°C, and wait for the constant temperature gas cabinet to heat up to 20°C. The detection gas in the pressurized tank 20 is controlled by the valve group module E to enter the thermostatic cabinet 10 .

After the natural gas components of different components are configured, open the valves 8 and 14, close the valves 9 and 15, and the external force pulls the counterweight 2 of the self-weight sealing movable part 12 to inhale the detection gas into different pressurized tanks 20, and then close the valve 8. , valve 14, the gas distribution stage has been completed. The next step is to connect the measured flowmeter. After the constant temperature cabinet 10 is heated to the specified temperature, the system enters the detection mode. Beginning with valve 9 and valve 15, if the natural gas components are used for testing, the known valve group module E valve branch pipe flow can be used for experimental testing. If the component is not used, it can be measured through the valve branch pipe with standard flow meters 11 and 17 on the branch pipe, and the other valve branch pipe can be calibrated. The detection gas enters the detection module C, and the detection gas is heated by the straight pipe at a constant temperature and enters the flowmeter to be measured installed on the installation parts 5 and 19 of the flowmeter to be measured. During the experiment, the temperature and pressure sensor 4 and the temperature and pressure sensor 18 continue to The real-time data is transmitted to the data analysis module D. The data analysis module D analyzes the collected data to obtain parameters such as the flow range, pressure loss, flow rate with temperature, pressure fluctuation range, and accuracy of the relevant flowmeter. The detected gas can be recovered into the gas storage tank 6 for centralized collection and processing.

In addition, the data analysis module D can further provide data instructions for the flow rate of the valve group module E, the gas composition in the gas distribution module A, and the temperature and pressure in the detection module C according to the collected data.

According to another embodiment of the present invention, in this case, marine natural gas (natural) and coal-made natural gas are used as detection gases, two different natural gas are injected into different pressurizing tanks 20, and the pressure of the pressurizing equipment is adjusted to 10Pa. After closing valve 8, the gas distribution phase has been completed. The next step is to connect the measured flowmeter. After the temperature of the constant temperature cabinet 10 is adjusted to 10°C, the system enters the detection mode. Open valve 9 and valve 15. Natural gas is an unused component. Measure through the valve branch pipe with standard flowmeters 11 and 17 on the valve branch pipe. At the same time, calibrate other valve branch pipes. Here, each valve group module E uses 8 valve branch pipes. After calibration The upper limit of the flow rate is 80m ³ /h.

The two kinds of natural gas enter the constant temperature cabinet 10 respectively, and then enter the flowmeters to be measured installed on the installation parts 5 and 19 of the flowmeters to be measured after being heated at a constant temperature by the straight pipes. The real-time data is transmitted to the data analysis module D. The data analysis module D analyzes the collected data to obtain parameters such as the flow range, pressure loss, flow rate with temperature, pressure fluctuation range, and accuracy of the relevant flowmeter. The detected gas can be recovered into the gas storage tank 6 for centralized collection and processing.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. A gas flow meter detection device, characterized in that it comprises a gas transmission module (T) for providing detection gas, a plurality of valve group modules (E) connected with the gas transmission module (T), and a plurality of valve group modules (E) connected with the gas transmission module (T) a detection module (C) connected to the valve group module (E); Wherein, the detection module (C) includes a plurality of flowmeters to be measured, and the valve group module (E) is connected with the flowmeters to be measured in one-to-one correspondence; and the gas delivery module includes a chamber (20), and a self-weight sealing movable part (12) for regulating the pressure of the chamber (20), and the valve block module (E) is connected with the chamber (20); Wherein, at least one of the plurality of valve group modules (E) includes: at least one first valve branch pipe connected with a standard flowmeter in series and a plurality of second valve branch pipes not connected with a standard flowmeter in series; if the detection gas The components of the gas flowmeter have been detected and used by the gas flowmeter detection device, and then the flowmeter of the to-be-measured flowmeter is detected at different flow rates through the flow rates of the plurality of second valve branch pipes of the valve group module (E). ; If the component of the detected gas is not used by the gas flow meter detection equipment, the detection is performed through the first valve branch pipe, and the second valve branch pipe is calibrated through the first valve branch pipe at the same time; At least one temperature and pressure sensor is provided at the inlet and outlet of each of the flowmeters to be measured. 2. The gas flow meter detection device according to claim 1, characterized in that, The gas delivery module (T) includes a gas distribution module (A) for accommodating the detection gas, and a pressurization module (B) for pressurizing the detection gas, and the chamber (20) is arranged in the In the pressurization module (B); the gas inlet of the pressurization module (B) is communicated with the gas outlet of the gas distribution module (A), and the gas outlet of the pressurization module (B) is connected to the valve group Modules (E) are connected one-to-one. 3. The gas flow meter detection device according to claim 2, characterized in that, the pressurizing module (B) comprises one of the chambers (20). 4. The gas flow meter detection device according to claim 2, wherein the pressurizing module (B) comprises a plurality of the chambers (20), Wherein, the chambers (20) are connected with the valve group modules (E) in one-to-one correspondence. 5. The flowmeter detection device according to claim 4, characterized in that, each of the chambers (20) is respectively provided with the self-weight sealing movable part (12), wherein all the self-weight sealing movable parts (12) ) are connected to each other by connecting rods. 6. The flowmeter detection device according to claim 4, characterized in that each of the chambers (20) is configured as a flexible chamber, and all the flexible chambers are sealed via the common self-weight sealing movable part (20). 12) The pressure regulation is performed synchronously. 7 . The gas flow meter detection device according to claim 1 , wherein the detection module (C) comprises a constant temperature cabinet ( 10 ), and the flow meter to be measured is arranged in the constant temperature cabinet ( 10 ). 8 . 8. The gas flow meter detection device according to claim 2, further comprising a data analysis module (D) and a data acquisition feedback module, Wherein, the data analysis module (D) is configured to receive the data collected by the data collection feedback module and analyze the data to obtain the parameters of the flowmeter to be measured, The data collection feedback module includes collecting the flow data of the valve group module (E), and also includes a component feedback module (G) and a temperature and pressure feedback module (F), The composition feedback module (G) feeds back the gas composition in the gas distribution module (A) to the data analysis module (D); the temperature and pressure feedback module (F) feeds the detection module (C) The temperature and pressure in ) are fed back to the data analysis module (D). 9. The gas flow meter detection device according to claim 1, wherein, At least one second standard flow meter is set in the detection module (C).

Images