Gas meter pipeline gas flow fluctuation simulation device

Abstract

The utility model discloses a gas meter pipeline gas flow fluctuation simulation device. The gas meter pipeline gas flow fluctuation simulation device comprises a gas output unit, a parameter detection unit, a test branch, a reference branch and a control unit, the gas output unit is respectively connected with the test branch and the reference branch and is used for generating gas flow; the parameter detection unit is used for detecting parameters of airflow; the test branch is used for collecting the accumulated flow of the airflow; the reference branch is used for collecting the instantaneous flow rate of airflow; the control unit is connected with the gas output unit, the parameter detection unit, the test branch and the reference branch and used for obtaining parameters, accumulated flow and instantaneous flow and controlling start and stop of the gas output unit and connection and disconnection of the test branch and the reference branch. The whole process of gas making, gas conveying and gas using can be simulated, and then gas flow fluctuation of a gas pipeline is simulated.

Description

Technical Field

[0001] The utility model relates to the technical field of airflow fluctuation simulation, and more particularly to a gas meter pipeline airflow fluctuation simulation device. Background Art

[0002] Ultrasonic gas meters, with their simple structure, high accuracy, and long lifespan, have seen their use steadily increase in recent years, with a trend toward replacing mechanical gas meters. The stability and reliability of ultrasonic time-difference gas flow metering have garnered significant attention from users.

[0003] However, the discontinuous nature of gas production by gas companies and end-user gas consumption can cause fluctuations in gas pipeline pressure and airflow. While user gas meters should not be able to absorb these fluctuations, ultrasonic gas meters, due to their high sensitivity, may incorporate these fluctuations into flow data, resulting in inaccurate measurement. Existing devices cannot simulate the entire gas production, transmission, and consumption process, and therefore cannot demonstrate the impact of gas pipeline airflow fluctuations on ultrasonic gas meters.

[0004] Therefore, how to simulate the entire process of gas production, gas transmission and gas use is an urgent problem that technical personnel in this field need to solve. Utility Model Content

[0005] In view of this, the utility model provides a gas meter pipeline airflow fluctuation simulation device, which can simulate the entire process of gas production, gas transmission and gas use, and then simulate the airflow fluctuation of the gas pipeline, which is helpful to simulate and test the ability of ultrasonic gas meters to resist pipeline gas fluctuations.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A gas meter pipeline airflow fluctuation simulation device comprises: a gas output unit, a parameter detection unit, a test branch, a reference branch and a control unit;

[0008] The gas output unit is connected to the test branch and the reference branch respectively, and is used to generate airflow;

[0009] The parameter detection unit is used to detect the parameters of the airflow;

[0010] The test branch is used to collect the cumulative flow of the airflow;

[0011] The reference branch is used to collect the instantaneous flow of the airflow;

[0012] The control unit is respectively connected to the gas output unit, the parameter detection unit, the test branch and the reference branch, and is used to obtain the parameters, the cumulative flow and the instantaneous flow, and control the start and stop of the gas output unit and the on and off of the test branch and the reference branch.

[0013] Preferably, the gas output unit comprises: an air compressor, a gas pressure-stabilizing tank and a main valve;

[0014] The outlet of the air compressor is connected to the inlet of the gas storage and pressure stabilizing tank;

[0015] The outlet of the gas storage pressure stabilizing tank is provided with the main valve;

[0016] The air compressor and the main valve are both connected to the control unit.

[0017] Preferably, the test branch includes: a first gas meter, a first pipeline and a first valve;

[0018] The first gas meter is arranged at the inlet of the first pipeline and is in communication with the first pipeline;

[0019] The first valve is provided at the outlet of the first pipeline;

[0020] The first gas meter and the first valve are both connected to the control unit.

[0021] Preferably, the reference branch includes: a first branch and a second branch;

[0022] The first branch includes: a second gas meter, a second pipeline and a second valve;

[0023] The second gas meter is arranged at the inlet of the second pipeline and is in communication with the second pipeline;

[0024] The second valve is provided at the outlet of the second pipeline;

[0025] The second gas meter and the second valve are both connected to the control unit.

[0026] Preferably, the second branch includes: a third gas meter, a third pipeline and a third valve;

[0027] The third gas meter is arranged at the inlet of the third pipeline and is connected to the third pipeline;

[0028] The outlet of the third pipeline is provided with the third valve;

[0029] The third gas meter and the third valve are both connected to the control unit.

[0030] Preferably, it also includes a main pipeline;

[0031] The inlet of the main line is connected to the outlet of the main valve;

[0032] The outlet of the main pipeline is connected to the inlet of the first gas meter, the second gas meter and the third gas meter respectively.

[0033] Preferably, the parameter detection unit includes: a temperature sensor and a pressure sensor;

[0034] The temperature sensor and the pressure sensor are both connected to the control unit.

[0035] Preferably, the temperature sensor and the pressure sensor are both arranged on the main pipe at the outlet of the main valve.

[0036] Preferably, the main valve, the first valve, the second valve and the third valve are all electric valves.

[0037] Preferably, it further includes a display unit;

[0038] The display unit is connected to the control unit and is used to display the parameters, the accumulated flow rate and the instantaneous flow rate acquired by the control unit.

[0039] It can be seen from the above technical solution that compared with the existing technology, the utility model discloses a gas meter pipeline airflow fluctuation simulation device, which accurately simulates the entire process of gas production, gas transmission and gas use by controlling the start and stop of the air compressor and the switching of each valve on the pipeline. At the same time, it simulates the airflow fluctuation of the gas pipeline, and can comprehensively simulate the airflow fluctuation caused by various factors during the use of the gas pipeline, and intuitively simulate and display the impact of the gas pipeline airflow fluctuation on the ultrasonic gas meter, which helps to simulate and test the ability of the ultrasonic gas meter to resist pipeline gas fluctuations, and plays a significant role in promoting the performance improvement and popularization of ultrasonic gas meters and ultrasonic flow meters. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0041] Figure 1 This is a structural schematic diagram of a gas meter pipeline airflow fluctuation simulation device provided in Example 1 of the present utility model.

[0042] Figure 2This is a schematic structural diagram of a gas meter pipeline airflow fluctuation simulation device provided in Example 2 of the present utility model.

[0043] Figure 3 This is a schematic diagram of the change in air flow velocity flowing through the corresponding gas meter during the working process provided by the utility model.

[0044] Figure numerals: 1-gas output unit, 11-air compressor, 12-gas storage pressure regulating tank, 13-main valve, 2-parameter detection unit, 21-temperature sensor, 22-pressure sensor, 3-test branch, 31-first gas meter, 32-first pipeline, 33-first valve, 4-reference branch, 41-first branch, 411-second gas meter, 412-second pipeline, 413-second valve, 42-second branch, 421-third gas meter, 422-third pipeline, 423-third valve, 5-control unit, 6-main pipeline, 7-display unit. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] Example 1

[0047] like Figure 1 As shown, the embodiment of the present utility model discloses a gas meter pipeline airflow fluctuation simulation device, comprising: a gas output unit 1, a parameter detection unit 2, a test branch 3, a reference branch 4 and a control unit 5;

[0048] The gas output unit 1 is connected to the test branch 3 and the reference branch 4 respectively, for generating a gas flow;

[0049] The parameter detection unit 2 is used to detect the parameters of the airflow;

[0050] Test branch 3 is used to collect the cumulative flow of airflow;

[0051] Reference branch 4 is used to collect the instantaneous flow rate of the airflow;

[0052] The control unit 5 is respectively connected to the gas output unit 1, the parameter detection unit 2, the test branch 3 and the reference branch 4, and is used to obtain parameters, cumulative flow and instantaneous flow, and control the start and stop of the gas output unit 1 and the on and off of the test branch 3 and the reference branch 4.

[0053] Example 2

[0054] like Figure 2 As shown, an embodiment of the present utility model discloses a gas meter pipeline airflow fluctuation simulation device, including: a gas output unit 1, a parameter detection unit 2, a test branch 3, a reference branch 4 and a control unit 5.

[0055] The gas output unit 1 is connected to the test branch 3 and the reference branch 4 respectively, and is used to generate an airflow with controllable gas pressure and gas flow rate to simulate and realize predetermined airflow fluctuations in the pipeline.

[0056] Preferably, the gas output unit 1 comprises: an air compressor 11, a gas storage and pressure stabilizing tank 12 and a main valve 13;

[0057] The outlet of the air compressor 11 is connected to the inlet of the gas storage and pressure stabilizing tank 12, and is used to compress the air into high-pressure gas to simulate the fuel gas and deliver it to the gas storage and pressure stabilizing tank 12;

[0058] The gas storage tank 12 is used to store the high-pressure gas delivered by the air compressor 11;

[0059] The outlet of the gas storage tank 12 is provided with a main valve 13 for regulating the gas flow rate of the high-pressure gas to supply gas to the subsequent pipeline;

[0060] The air compressor 11 and the main valve 13 are both connected to the control unit 5 , and the start and stop of the air compressor 11 and the opening and closing of the main valve 13 are controlled by the control unit 5 .

[0061] Preferably, the control unit 5 controls the start and stop of the air compressor 11 and the switch of the main valve 13, so that the gas output unit 1 generates an airflow with controllable gas flow rate, simulates the predetermined airflow fluctuations in the pipeline, and simulates the generation and transportation process of the gas.

[0062] The parameter detection unit 2 is used to detect the parameters of the airflow.

[0063] Preferably, the parameter detection unit 2 includes: a temperature sensor 21 and a pressure sensor 22;

[0064] The temperature sensor 21 and the pressure sensor 22 are both connected to the control unit 5 .

[0065] Preferably, it also includes a main line 6;

[0066] The inlet of the main line 6 is connected to the outlet of the main valve 13;

[0067] The outlet of the main line 6 is connected to the inlets of the first gas meter 31 , the second gas meter 411 , and the third gas meter 421 , respectively.

[0068] Preferably, the temperature sensor 21 and the pressure sensor 22 are both arranged on the main pipe 6 at the outlet of the main valve 13 .

[0069] Preferably, the temperature sensor 21 is used to detect the air flow temperature in the main line 6 and send it to the control unit 5. The simulation device is installed in the indoor space. The control unit 5 adjusts the gas temperature based on the air flow temperature through the air conditioning system of the indoor space, thereby ensuring that the air flow temperature in the main line 6 is within a preset range.

[0070] Preferably, in this embodiment, the preset range of the air flow temperature is: 23±5°C.

[0071] Preferably, the pressure sensor 22 is used to detect the airflow pressure in the main line 6 and send it to the control unit 5 .

[0072] Preferably, the control unit 5 controls the start and stop of the air compressor 11 and the opening angle of the main valve 13 based on the difference between the obtained air flow pressure and the target pressure, so that the pressure of the gas storage pressure stabilizing tank 12 is stabilized within a preset range, generating an airflow with controllable gas pressure, so that the pressure in the main line 6 remains relatively stable.

[0073] Preferably, the air flow parameters include: air flow temperature and air flow pressure.

[0074] Test branch 3 is used to collect the cumulative flow of the airflow.

[0075] Preferably, the test branch 3 includes: a first gas meter 31, a first pipeline 32 and a first valve 33;

[0076] The first gas meter 31 is provided at the entrance of the first pipeline 32 and is in communication with the first pipeline 32 and is used to collect the cumulative flow of the gas flow in real time and simulate the collected cumulative flow of the gas;

[0077] A first valve 33 is provided at the outlet of the first pipeline 32;

[0078] The first gas meter 31 and the first valve 33 are both connected to the control unit 5 .

[0079] Preferably, the control unit 5 is connected to the first gas meter 31 and the first valve 33 to obtain the cumulative flow collected by the first gas meter 31, and realizes the on and off of the test branch 3 by controlling the switch of the first valve 33, simulating the opening and closing of the gas cooker by the gas meter user.

[0080] Reference branch 4 is used to collect the instantaneous flow rate of the airflow.

[0081] Preferably, the reference branch 4 includes: a first branch 41 and a second branch 42;

[0082] The first branch 41 includes: a second gas meter 411, a second pipeline 412 and a second valve 413;

[0083] The second gas meter 411 is provided at the inlet of the second pipeline 412 and is in communication with the second pipeline 412 for collecting the instantaneous flow of the gas flow in real time and simulating the collected instantaneous flow of the gas;

[0084] A second valve 413 is provided at the outlet of the second pipeline 412;

[0085] The second gas meter 411 and the second valve 413 are both connected to the control unit 5 .

[0086] Preferably, the control unit 5 obtains the instantaneous flow collected by the second gas meter 411 by connecting to the second gas meter 411 and the second valve 413, and realizes the on and off of the first branch 41 by controlling the switch of the second valve 413, simulating the opening and closing of the gas stove by the gas meter user.

[0087] Preferably, the second branch 42 includes: a third gas meter 421, a third pipeline 422 and a third valve 423;

[0088] The third gas meter 421 is provided at the inlet of the third pipeline 422 and is in communication with the third pipeline 422 for collecting the instantaneous flow of the gas flow in real time and simulating the collected instantaneous flow of the gas;

[0089] A third valve 423 is provided at the outlet of the third pipeline 422;

[0090] The third gas meter 421 and the third valve 423 are both connected to the control unit 5 .

[0091] Preferably, the control unit 5 obtains the instantaneous flow collected by the third gas meter 421 by connecting to the third gas meter 421 and the third valve 423, and realizes the on and off of the second branch 42 by controlling the switch of the third valve 423, simulating the opening and closing of the gas stove by the gas meter user.

[0092] Preferably, the control unit 5 adjusts the opening ratio of the main valve 13 based on the instantaneous flow collected by the second gas meter 411 and the third gas meter 421 .

[0093] Preferably, the main valve 13 , the first valve 33 , the second valve 413 and the third valve 423 are all electric valves.

[0094] The control unit 5 is respectively connected to the gas output unit 1, the parameter detection unit 2, the test branch 3 and the reference branch 4, and is used to obtain parameters, cumulative flow and instantaneous flow, and control the start and stop of the gas output unit 1 and the on and off of the test branch 3 and the reference branch 4.

[0095] Preferably, the control unit 5 is connected to the air compressor 11, the main valve 13, the temperature sensor 21, the pressure sensor 22, the first gas meter 31, the first valve 33, the second gas meter 411, the second valve 413, the third gas meter 421 and the third valve 423 respectively by wired or wireless means.

[0096] Preferably, it further includes a display unit 7;

[0097] The display unit 7 is connected to the control unit 5 and is used to display the airflow temperature, airflow pressure, accumulated flow rate and instantaneous flow rate obtained by the control unit 5 .

[0098] Preferably, the display unit 7 in this embodiment adopts a liquid crystal display.

[0099] Preferably, a power supply module is also included, which is respectively connected to the air compressor 11, the main valve 13, the temperature sensor 21, the pressure sensor 22, the first gas meter 31, the first valve 33, the second gas meter 411, the second valve 413, the third gas meter 421, the third valve 423 and the control unit 5, for supplying power to the above-mentioned devices.

[0100] Example 3

[0101] Working principle of this utility model:

[0102] When the switch status of the valves corresponding to the test branch 3, the first branch 41 and the second branch 42 changes, the air flow velocity flowing through the corresponding gas meter changes as follows: Figure 3 shown. Figure 3 The middle curve 8 represents the change in airflow velocity of the first gas meter 31 when the second valve 413 is opened, the curve 9 represents the change in airflow velocity of the second gas meter 411 when the second valve 413 is opened, and the curve 10 represents the change in airflow velocity of the first gas meter 31 when the second valve 413 and the third valve 423 are closed at the same time.

[0103] Initial state: the air compressor 11 is started through the control unit 5, the air compressor 11 compresses the air into high-pressure gas and transmits it to the gas storage pressure-stabilizing tank 12, the main valve 13 is opened, the first valve 33, the second valve 413 and the third valve 423 are closed, and the air flows into the first pipeline 32, the second pipeline 412 and the third pipeline 422 respectively through the main pipeline 6. When the measured value of the pressure sensor 22 reaches the standard pressure range, the cumulative flow value of the first gas meter 31 is read through the display unit 7 as the initial value; at the same time, according to the air flow temperature collected by the temperature sensor 21, the air flow temperature in the main pipeline 6 is ensured to be within the preset range, simulating the gas production and gas transmission process.

[0104] At time t0: the second valve 413 is controlled to open by the control unit 5, and the first valve 33 and the third valve 423 remain in the closed state, simulating the gas consumption process of the second gas meter 411. The gas flow rate flowing through the second gas meter 411 increases rapidly from 0, and then gradually stabilizes to V1. The gas flow rate at the pipeline branch convergence point increases at the moment the second valve 413 is opened. According to the Bernoulli principle, a gas pressure difference is generated at both ends of the test branch 3 and the second branch 42 in the closed state, resulting in the reverse flow of the airflow in the test branch 3 and the second branch 42. After the gas flow rate stabilizes, the gas flow in the test branch 3 and the second branch 42 gradually decreases to 0 and reaches balance again. Based on this, a jittering airflow is generated in the first gas meter 31 and the third gas meter 421 when the first valve 33 and the third valve 423 are closed, corresponding to the simulated airflow fluctuations generated in the test branch 3 and the second branch 42.

[0105] At time t1: the third valve 423 is controlled to open by the control unit 5, the first valve 33 remains closed, the second valve 413 remains open, and the third valve 423 is opened to simulate the gas usage process of the second gas meter 411 and the third gas meter 421. The gas flow rate flowing through the third gas meter 421 increases rapidly from 0, and then gradually stabilizes to V2. V1 and V2 are the same in size and are within the range of the gas meter. The flow rate at the pipeline branch converging point increases at the moment the third valve 423 is opened. The same principle as the above-mentioned Bernoulli generates jittering airflow in the second gas meter 411 with relatively stable airflow and the first gas meter 31 with zero airflow, which corresponds to the simulation of the airflow fluctuations generated in the first branch 41 and the test branch 3.

[0106] At time t2: the second valve 413 and the third valve 423 are controlled to be closed by the control unit 5, and the first valve 33 remains closed, simulating a state where no user uses gas. The gas flow rate flowing through the second gas meter 411 and the third gas meter 421 decreases rapidly and gradually stabilizes to 0. There is no airflow. The flow rate at the pipeline branch confluence point decreases at the moment the second valve 413 and the third valve 423 are closed. According to the Bernoulli principle, a gas pressure difference is generated at both ends of the test branch 3 in the closed state, causing the airflow in the test branch 3 to flow in the forward direction. After the airflow rate stabilizes, the gas flow in the test branch 3 gradually decreases to 0 and reaches balance again. Based on this, a jittering airflow is generated in the first gas meter 31 when the first valve 33 is closed, simulating the airflow fluctuation generated in the test branch 3.

[0107] At time t3: the second valve 413 is controlled to open by the control unit 5, and the first valve 33 and the third valve 423 remain closed, and the above-mentioned t0 action is repeated. The same principle is used to generate a jittering airflow in the first gas meter 31 and the third gas meter 421, corresponding to the airflow fluctuations generated in the simulated test branch 3 and the second branch 42.

[0108] Repeat the process from t1 to t3; the time interval between t0, t1, t2 and t3 is within the range of 1-120 seconds. The number of repetitions can be set from 1 to 10,000 times.

[0109] During the simulation experiment, the control unit 5 adjusts the opening ratio of the main valve 13 according to the instantaneous flow rate of the gas flow collected by the second gas meter 411 and the third gas meter 421, so that the gas flow rate of the gas meter in the test branch 3, the first branch 41 and the second branch 42 is within the gas meter flow range and meets the actual demand of users for daily gas use, that is, the gas meter flow rate in the test branch 3, the first branch 41 and the second branch 42 should be within q t <q<q max In the range, q t Indicates the gas meter boundary flow rate, q max Indicates the maximum flow range of the gas meter to ensure the effectiveness of the simulation experiment process.

[0110] After the test is performed at a predetermined time interval and for a predetermined number of repetitions, the cumulative flow value of the first gas meter 31 is read again as the experimental value. Since the first valve 33 of the corresponding test branch 3 is always closed during the simulation experiment of the first gas meter 31, the cumulative flow data of the first gas meter 31 before and after the simulation experiment should not change. If the initial value is the same as the experimental value, it indicates that the first gas meter 31 is qualified. If the initial value is different from the experimental value, it indicates that the first gas meter 31 is unqualified.

[0111] The second gas meter 411 and the third gas meter 421 serve as branch references, and the instantaneous flow rates collected by the second gas meter 411 and the third gas meter 421 serve as a basis for the control unit 5 to adjust the opening ratio of the main valve 13 .

[0112] Preferably, the utility model adopts digital acquisition and control methods to simulate the airflow fluctuations in the gas transmission pipeline, can realize the combination of multiple fluctuation conditions, can simulate the pipeline airflow fluctuations with fixed periods and variable periods, and can comprehensively simulate the airflow fluctuations caused by various factors during the use of the gas pipeline.

[0113] It can be seen from the above technical solution that the utility model discloses a gas meter pipeline airflow fluctuation simulation device, which accurately simulates the entire process of gas production, gas transmission and gas use by controlling the start and stop of the air compressor and the switching of each valve on the pipeline, and at the same time simulates the airflow fluctuation of the gas pipeline. It can comprehensively simulate the airflow fluctuation caused by various factors during the use of the gas pipeline, and intuitively simulate and display the impact of the gas pipeline airflow fluctuation on the ultrasonic gas meter, which helps to simulate and test the ability of the ultrasonic gas meter to resist pipeline gas fluctuations, and plays a significant role in promoting the performance improvement and popularization of ultrasonic gas meters and ultrasonic flow meters.

[0114] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0115] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas meter pipeline air flow fluctuation simulation device, characterized in that: include: Gas output unit, parameter detection unit, test branch, reference branch and control unit; The gas output unit is connected to the test branch and the reference branch respectively, and is used to generate airflow; The parameter detection unit is used to detect the parameters of the airflow; The test branch is used to collect the cumulative flow of the airflow; The reference branch is used to collect the instantaneous flow of the airflow; The control unit is respectively connected to the gas output unit, the parameter detection unit, the test branch and the reference branch, and is used to obtain the parameters, the cumulative flow and the instantaneous flow, and control the start and stop of the gas output unit and the on and off of the test branch and the reference branch.

2. A gas meter pipeline airflow fluctuation simulation device according to claim 1, characterized in that: The gas output unit includes: an air compressor, a gas storage pressure stabilizing tank and a main valve; The outlet of the air compressor is connected to the inlet of the gas storage and pressure stabilizing tank; The outlet of the gas storage pressure stabilizing tank is provided with the main valve; The air compressor and the main valve are both connected to the control unit.

3. A gas meter pipeline airflow fluctuation simulation device according to claim 2, characterized in that: The test branch includes: a first gas meter, a first pipeline and a first valve; The first gas meter is arranged at the inlet of the first pipeline and is in communication with the first pipeline; The first valve is provided at the outlet of the first pipeline; The first gas meter and the first valve are both connected to the control unit.

4. A gas meter pipeline airflow fluctuation simulation device according to claim 3, characterized in that: The reference branch includes: a first branch and a second branch; The first branch includes: a second gas meter, a second pipeline and a second valve; The second gas meter is arranged at the inlet of the second pipeline and is in communication with the second pipeline; The second valve is provided at the outlet of the second pipeline; The second gas meter and the second valve are both connected to the control unit.

5. A gas meter pipeline airflow fluctuation simulation device according to claim 4, characterized in that: The second branch includes: a third gas meter, a third pipeline and a third valve; The third gas meter is arranged at the inlet of the third pipeline and is in communication with the third pipeline; The outlet of the third pipeline is provided with the third valve; The third gas meter and the third valve are both connected to the control unit.

6. A gas meter pipeline airflow fluctuation simulation device according to claim 5, characterized in that: It also includes the main road; The inlet of the main line is connected to the outlet of the main valve; The outlet of the main pipeline is connected to the inlet of the first gas meter, the second gas meter and the third gas meter respectively.

7. A gas meter pipeline airflow fluctuation simulation device according to claim 6, characterized in that: The parameter detection unit includes: a temperature sensor and a pressure sensor; The temperature sensor and the pressure sensor are both connected to the control unit.

8. A gas meter pipeline airflow fluctuation simulation device according to claim 7, characterized in that: The temperature sensor and the pressure sensor are both arranged on the main pipe at the outlet of the main valve.

9. The gas meter pipeline airflow fluctuation simulation device according to claim 5, characterized in that: The main valve, the first valve, the second valve and the third valve are all electric valves.

10. The gas meter pipeline airflow fluctuation simulation device according to claim 1, characterized in that: Also included is a display unit; The display unit is connected to the control unit and is used to display the parameters, the accumulated flow rate and the instantaneous flow rate acquired by the control unit.

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