Real gas circulation detection equipment suitable for gas meter

Abstract

The utility model discloses real gas circulation detection equipment suitable for a gas meter, relates to the technical field of gas meter detection, and solves the technical problems that the existing detection equipment for carrying out real gas test on the gas meter is relatively huge, complicated and inconvenient to use. The equipment comprises a gas pump, a standard flowmeter, a gas meter mounting assembly and a plurality of control ball valves, the gas pump, the standard flow meter, the gas meter mounting assembly and the plurality of control ball valves are connected in series through a loop gas pipe; the loop air pipe is used for storing to-be-detected gas, and the air pump is used for adjusting the flow rate of the to-be-detected gas and driving the to-be-detected gas to circulate and escape in the loop air pipe. The standard flow meter and the gas meter installation assembly are connected in series through the loop gas pipe, original gas in equipment can be replaced and the gas leakage direction can be adjusted only through mutual matching of the control ball valves arranged on the loop gas pipe, and static or dynamic real gas testing of the gas meter is achieved by adjusting the power supply voltage of the gas pump.

Description

Technical Field

[0001] The utility model relates to the technical field of gas meter detection, in particular to a real gas circulation detection device suitable for a gas meter. Background Art

[0002] As a new type of legal measuring instrument, ultrasonic gas meter is a new type of electronic gas meter that uses modern microelectronics technology and modern sensor technology to measure gas, transmit data remotely and settle transactions. Ultrasonic gas meter is regarded as an iterative product of current diaphragm gas meter and is gradually replacing diaphragm gas meter.

[0003] At present, many companies are often only able to choose air as the test medium for ultrasonic gas meters during the process of developing ultrasonic gas meters. However, the ultrasonic signal of the ultrasonic gas meter will show different degrees of attenuation in a real gas environment (such as a natural gas environment). For ultrasonic gas meters, if they are only tested in the air, it is impossible to completely replace the real gas environment, and many unpredictable problems in the air will occur. Therefore, real gas testing is an indispensable test item. The existing ultrasonic gas meter detection equipment cannot perform real gas detection on gas meters very well. Generally, a set of formal real gas detection equipment needs to be specially built. However, the cost of building real gas detection equipment is high and needs to be supervised. It is very inconvenient to implement and use.

[0004] In the process of implementing the utility model, the applicant found that there are at least the following problems in the prior art:

[0005] The existing detection equipment for performing real gas testing on gas meters is relatively large, complex and inconvenient to use. Utility Model Content

[0006] The purpose of the utility model is to provide a real gas circulation detection device suitable for a gas meter, so as to solve the technical problem that the existing detection equipment for real gas testing of a gas meter is relatively large, complex and inconvenient to use. The preferred technical solution among the many technical solutions provided by the utility model can produce many technical effects as described below.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] The utility model provides a real gas circulation detection device suitable for a gas meter, comprising an air pump, a standard flow meter, a gas meter installation component and a plurality of control ball valves; the air pump, the standard flow meter, the gas meter installation component and the plurality of control ball valves are connected in series via a loop air pipe; the loop air pipe is used to store the gas to be tested, and the air pump is used to adjust the flow rate of the gas to be tested and drive the gas to be tested to circulate in the loop air pipe.

[0009] Preferably, the loop gas pipe includes a main pipe, a first branch pipe and a second branch pipe, the main pipe is a ring-shaped gas pipe that connects the air pump, the standard flow meter and the gas meter installation assembly in series; the first branch pipe and the second branch pipe are both connected in parallel with the gas meter installation assembly, and the first end of the second branch pipe is connected between the first end of the first branch pipe and the first end of the gas meter installation assembly, and the second end of the first branch pipe is connected between the second end of the second branch pipe and the second end of the gas meter installation assembly.

[0010] Preferably, it also includes a first inflation port and a first air outlet, wherein the first inflation port is arranged adjacent to the first air outlet, the first inflation port is arranged on the inflation branch of the main pipeline, and the first air outlet is arranged on the outlet branch of the main pipeline; the first inflation port is used to fill the loop air pipe with the gas to be tested, and the first air outlet is used for exhausting gas.

[0011] Preferably, the multiple control ball valves include a first ball valve, a second ball valve, a third ball valve, a fourth ball valve, a fifth ball valve, a sixth ball valve and a seventh ball valve; the first ball valve is connected in series to the inflation branch, the second ball valve is connected in series between the inflation branch and the air outlet branch through the main pipeline, the third ball valve is connected in series to the air outlet branch, the fourth ball valve is connected in series between the second end of the first branch and the second end of the second branch through the main pipeline, the fifth ball valve is connected in series to the second branch, the sixth ball valve is connected in series to the first branch, and the seventh ball valve is connected in series between the first end of the first branch and the first end of the second branch through the main pipeline.

[0012] Preferably, it also includes a pressure gauge, which is connected in series to the first end of the gas meter installation assembly or the second end of the gas meter installation assembly through the main pipeline, and the pressure gauge is used to monitor the state of the gas in the loop gas pipe.

[0013] Preferably, two gas storage tanks are further included, the two gas storage tanks are connected in series between the first gas outlet and the standard flow meter through the main pipeline, and the air pump is arranged between the two gas storage tanks.

[0014] Preferably, the gas meter installation assembly includes at least one gas meter installation position, and a gas meter is fixed on each of the gas meter installation positions; when the gas meter installation assembly includes more than one gas meter installation position, more than one gas meter installation position are connected in series through the main pipeline.

[0015] Preferably, it also includes a switch button, which is used to control the switch state of the control ball valve to adjust the actual air circulation detection equipment to the inflation state, the left air intake internal circulation air leakage state or the right air intake internal circulation air leakage state.

[0016] Preferably, it also includes a second inflation port, a second air outlet, an eighth ball valve, a ninth ball valve, a tenth ball valve and an eleventh ball valve, the second inflation port is arranged at the first end of the gas meter installation assembly, and the second air outlet is arranged at the second end of the gas meter installation assembly; the eighth ball valve is arranged on the second inflation port, the ninth ball valve is arranged on the second air outlet, the tenth ball valve is arranged between the first end of the second branch pipe and the second inflation port, and the eleventh ball valve is arranged between the second end of the first branch pipe and the second air outlet.

[0017] Preferably, the gas meter fixed on the gas meter mounting assembly includes an ultrasonic gas meter and / or a diaphragm gas meter.

[0018] Implementing one of the above technical solutions of the utility model has the following advantages or beneficial effects:

[0019] The utility model connects a standard flow meter and a gas meter installation component in series through a loop gas pipe. The original gas in the equipment can be replaced and the gas leakage direction can be adjusted by cooperating with each other through a plurality of control ball valves arranged on the loop gas pipe. Static or dynamic real gas testing of the gas meter can be achieved by adjusting the power supply voltage of the air pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 It is a first structural schematic diagram of an embodiment of the utility model of a real gas circulation detection device applicable to a gas meter;

[0022] Figure 2 It is a second structural schematic diagram of an embodiment of the utility model of a real gas circulation detection device applicable to a gas meter;

[0023] Figure 3 This is a third structural schematic diagram of an embodiment of the utility model of a real gas circulation detection device suitable for a gas meter.

[0024] In the figure: 1. air pump; 2. standard flow meter; 3. gas meter installation assembly; 4. main pipeline; 5. first branch pipe; 6. second branch pipe; 7. first charging port; 8. first air outlet; 9. first ball valve; 10. second ball valve; 11. third ball valve; 12. fourth ball valve; 13. fifth ball valve; 14. sixth ball valve; 15. seventh ball valve; 16. pressure gauge; 17. gas storage tank; 18. gas meter; 19. second charging port; 20. second air outlet; 21. eighth ball valve; 22. ninth ball valve; 23. tenth ball valve; 24. eleventh ball valve. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the utility model clearer, the various exemplary embodiments to be described below will refer to the corresponding drawings, which constitute a part of the exemplary embodiments, wherein various exemplary embodiments that may be used to implement the utility model are described. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with the present disclosure. It should be understood that they are only examples of processes, methods, and devices that are consistent with some aspects of the utility model disclosed as detailed in the attached claims, and other embodiments may also be used, or the embodiments listed herein may be modified in structure and function without departing from the scope and essence of the utility model.

[0026] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", etc. indicate the orientation or position relationship based on the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the elements referred to must have a specific orientation, be constructed and operated in a specific orientation. The terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The term "multiple" means two or more. The terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a communication connection, a direct connection, an indirect connection through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0027] In order to illustrate the technical solution of the present invention, a specific embodiment is provided below, in which only the parts related to the embodiment of the present invention are shown.

[0028] Embodiment 1:

[0029] like Figure 1 As shown, the utility model provides a real gas circulation detection device suitable for a gas meter, including an air pump 1, a standard flow meter 2, a gas meter installation assembly 3 and a plurality of control ball valves. The air pump 1, the standard flow meter 2, the gas meter installation assembly 3 and the plurality of control ball valves are connected in series through a loop air pipe. The loop air pipe is used to store the gas to be tested, and the air pump 1 is used to adjust the flow rate of the gas to be tested and drive the gas to be tested to circulate in the loop air pipe. Specifically, the loop air pipe can transmit the gas to be tested stored in the loop air pipe. The standard flow meter 2 can be used as a reference source to obtain a standard instantaneous flow rate and a long-term cumulative usage, which is convenient for the gas meter 18 installed on the gas meter installation assembly 3 to perform comparison and detection. The loop air pipe connects the standard flow meter 2 and the gas meter installation assembly 3 in series, so that the standard flow meter 2 and the gas meter 18 on the gas meter installation assembly 3 are in the same working environment for working measurement. Before starting the gas pump 1, the accumulated usage readings of the standard flow meter 2 and the gas meter 18 to be tested can be recorded. When the running time is reached, the gas meter 18 can calculate the indication error by comparing it with the reading of the standard flow meter 2 to determine the reliability of long-term operation.

[0030] Since the existing gas meter 18 has a gas meter 18 with a left air intake and a gas meter 18 with a right air intake, the actual gas circulation detection device can be adjusted to the gas leakage state of the left air intake inner circulation or the gas leakage state of the right air intake inner circulation through the cooperation of multiple control ball valves and the loop air pipe, so that the actual gas circulation detection device can be applied to the actual gas test of the gas meter 18 with a left air intake and the gas meter 18 with a right air intake, avoiding the inconsistency between the air intake direction of the gas meter 18 and the gas leakage direction of the actual gas circulation detection device, and ensuring the accuracy of measuring the gas meter 18. At the same time, multiple control ball valves cooperate with each other, and the actual gas circulation detection device can also be adjusted to the inflation state to replace the original gas in the device. The air pump 1 drives the gas to be tested to flow in the loop air pipe, so as to realize the dynamic actual gas test of the gas meter 18 on the gas meter installation component 3. Turn off the air pump 1, so that the gas to be tested in the loop air pipe remains stationary, so as to realize the static actual gas test of the gas meter 18 on the gas meter installation component 3. By adjusting the power supply voltage of the gas pump 1, the flow rate of the gas to be tested can be changed. With the help of the instantaneous flow reading on the standard flow meter 2, the desired instantaneous flow can be configured to verify the metering characteristics of the gas meter 18 in a real gas environment with large, medium and small flow ranges.

[0031] The utility model connects a standard flow meter 2 and a gas meter installation assembly 3 in series via a loop gas pipe. The original gas in the equipment can be replaced and the gas leakage direction can be adjusted by cooperating with a plurality of control ball valves arranged on the loop gas pipe. The static or dynamic real gas test of the gas meter 18 can be achieved by adjusting the power supply voltage of the air pump 1.

[0032] As an optional embodiment, the loop gas pipe includes a main pipe 4, a first branch pipe 5 and a second branch pipe 6. The main pipe 4 is an annular gas pipe that connects the air pump 1, the standard flow meter 2 and the gas meter installation assembly 3 in series. The first branch pipe 5 and the second branch pipe 6 are both connected in parallel with the gas meter installation assembly 3, and the first end of the second branch pipe 6 is connected between the first end of the first branch pipe 5 and the first end of the gas meter installation assembly 3, and the second end of the first branch pipe 5 is connected between the second end of the second branch pipe 6 and the second end of the gas meter installation assembly 3. Specifically, the main pipe 4 is connected in series with the air pump 1, the standard flow meter 2 and the gas meter installation assembly 3 to form an annular gas pipe, and the gas to be tested can be driven by the air pump 1 to escape in one direction (such as clockwise), and the gas to be tested will enter from the first end of the gas meter installation assembly 3 and flow out from the second end of the gas meter installation assembly 3, so as to implement a left intake internal circulation gas escape test on the gas meter 18 on the gas meter installation assembly 3. The first end of the second branch pipe 6 is connected between the first end of the first branch pipe 5 and the first end of the gas meter installation assembly 3, and the second end of the first branch pipe 5 is connected between the second end of the second branch pipe 6 and the second end of the gas meter installation assembly 3. When the gas to be tested enters the first branch pipe 5, it can enter from the second end of the gas meter installation assembly 3 and flow out from the first end of the gas meter installation assembly 3, so as to perform a right intake internal circulation gas leakage test on the gas meter 18 on the gas meter installation assembly 3. The main pipeline 4, the first branch pipe 5 and the second branch pipe 6 cooperate with each other, so that the real gas circulation detection equipment has two circulation test functions with different intake modes, which can better meet the user's use needs.

[0033] As an optional embodiment, it further includes a first air filling port 7 and a first air outlet 8, the first air filling port 7 is arranged adjacent to the first air outlet 8, the first air filling port 7 is arranged on the air filling branch of the main pipeline 4, the first air outlet 8 is arranged on the air outlet branch of the main pipeline 4, the first air filling port 7 is used to fill the loop air pipe with the gas to be tested, and the first air outlet 8 is used to exhaust. Specifically, the first air filling port 7 is arranged adjacent to the first air outlet 8 to ensure that the replaced gas to be tested can easily reach various positions in the device, thereby improving the efficiency of gas replacement and ventilation effect inside the device.

[0034] As an optional embodiment, the plurality of control ball valves include a first ball valve 9, a second ball valve 10, a third ball valve 11, a fourth ball valve 12, a fifth ball valve 13, a sixth ball valve 14 and a seventh ball valve 15. The first ball valve 9 is connected in series to the inflation branch, the second ball valve 10 is connected in series between the inflation branch and the outlet branch through the main pipeline 4, the third ball valve 11 is connected in series to the outlet branch, the fourth ball valve 12 is connected in series between the second end of the first branch pipe 5 and the second end of the second branch pipe 6 through the main pipeline 4, the fifth ball valve 13 is connected in series to the second branch pipe 6, the sixth ball valve 14 is connected in series to the first branch pipe 5, and the seventh ball valve 15 is connected in series between the first end of the first branch pipe 5 and the first end of the second branch pipe 6 through the main pipeline 4. Specifically, the first ball valve 9 is connected in series to the inflation branch, the third ball valve 11 is connected in series to the outlet branch, and the first inflation port 7 and the first outlet port 8 are opened and closed by the first ball valve 9 and the third ball valve 11. The fifth ball valve 13 and the sixth ball valve 14 control the opening or closing of the right intake internal circulation gas leakage path, and the fourth ball valve 12 and the seventh ball valve 15 control the opening or closing of the left intake internal circulation gas leakage path. The second ball valve 10 is connected in series between the charging branch and the outlet branch through the main pipeline 4. When the real gas circulation detection device is in the charging state, the second ball valve 10 is closed to prevent the charged gas to be tested from flowing out from the first outlet 8 without entering the device.

[0035] As an optional embodiment, a pressure gauge 16 is further included, which is connected in series to the first end of the gas meter installation assembly 3 or the second end of the gas meter installation assembly 3 through the main pipeline 4. The pressure gauge 16 is used to monitor the state of the gas in the loop gas pipe. Specifically, the pressure gauge 16 is connected in series to the loop gas pipe to monitor the state of the internal gas to ensure that no leakage occurs and to ensure the safe operation of the equipment.

[0036] As an optional embodiment, two gas storage tanks 17 are further included, and the two gas storage tanks 17 are connected in series between the first gas outlet 8 and the standard flow meter 2 through the main pipeline 4, and the air pump 1 is arranged between the two gas storage tanks 17. Specifically, the gas storage tank 17 can buffer the gas to be tested, and during the gas leakage test, it is ensured that the gas to be tested that flows out through the air pump 1 will not be in the form of turbulent flow, and the gas to be tested has good stability. In the dynamic test, a constant flow rate is used for testing, which can improve the accuracy of the test.

[0037] As an optional embodiment, the gas meter installation assembly 3 includes at least one gas meter installation position, and a gas meter 18 is fixed on each gas meter installation position; when the gas meter installation assembly 3 includes more than one gas meter installation position, more than one gas meter installation position is connected in series through the main pipeline 4. Specifically, the number of gas meter installation positions on the gas meter installation assembly 3 is preferably three, and can also be adaptively set to one, two, four or five according to actual needs, but the number of gas meter installation positions should not be too many to ensure the stability of the gas flow to be tested. When the gas meter 18 is tested for gas leakage, it is necessary to ensure that a gas meter 18 is fixed on each gas meter installation position to avoid leakage of the real gas circulation detection equipment during the gas leakage test. When the number of gas meter installation positions is more than one, all gas meter installation positions are connected in series through the main pipeline 4 to ensure that during the gas leakage test, the gas to be tested will pass through the gas meters 18 on the gas meter installation positions connected in series in sequence to achieve the test of each gas meter 18.

[0038] As an optional implementation, a switch button is further included, and the switch button is used to control the switch state of the control ball valve, and adjust the real gas circulation detection device to the inflation state, the left air intake internal circulation gas leakage state, or the right air intake internal circulation gas leakage state. Specifically, the switch button can easily realize the switch state of the designated control ball valve, thereby changing the air intake direction, and adjusting the real gas circulation detection device to the inflation state, the left air intake internal circulation gas leakage state, or the right air intake internal circulation gas leakage state.

[0039] As an optional implementation, the gas meter 18 fixed on the gas meter installation assembly 3 includes an ultrasonic gas meter and / or a diaphragm gas meter. Specifically, each gas meter installation position on the gas meter installation assembly 3 is adapted to an ultrasonic gas meter and a diaphragm gas meter, and the user may need to fix the ultrasonic gas meter or the diaphragm gas meter on the gas meter installation position for real gas testing. The real gas circulation detection device of the utility model is not only suitable for real gas testing of ultrasonic gas meters, but also suitable for real gas testing of diaphragm gas meters, and can meet the different usage requirements of users.

[0040] The working principle of the real gas circulation detection device of the first embodiment is as follows:

[0041] Inflation state: the first ball valve 9 is open, the second ball valve 10 is closed, the third ball valve 11 is open, and the fourth ball valve 12, the fifth ball valve 13, the sixth ball valve 14 and the seventh ball valve 15 are all open. The gas to be tested is charged from the first inflation port 7, and the air pump 1 is turned on. The gas to be tested passes through the entire loop air pipe and is discharged from the first outlet 8. At the same time, the sound velocity display function of the gas meter 18 is used to detect the concentration of the gas in the loop air pipe. When the concentration reaches the preset concentration, the first ball valve 9 and the third ball valve 11 are closed, and the second ball valve 10 is opened to complete the gas replacement in the real gas circulation detection equipment.

[0042] The state of gas leakage in the left intake internal circulation: the first ball valve 9 is closed, the second ball valve 10 is opened, the third ball valve 11 is closed, the fourth ball valve 12 is opened, the fifth ball valve 13 is closed, the sixth ball valve 14 is closed, and the seventh ball valve 15 is opened. Turn on the air pump 1. The flow direction of the gas to be tested is as follows: Figure 2 The large arrow and dotted line shown indicate the left intake direction, and the gas leakage state of the left intake internal circulation is suitable for detecting the left intake gas meter 18. When detecting the gas meter 18, by adjusting the power supply voltage of the air pump 1, a static or dynamic real gas test of the gas meter 18 is achieved.

[0043] Right intake internal circulation gas leakage state: the first ball valve 9 is closed, the second ball valve 10 is opened, the third ball valve 11 is closed, the fourth ball valve 12 is closed, the fifth ball valve 13 is opened, the sixth ball valve 14 is opened, and the seventh ball valve 15 is closed. Turn on the air pump 1. The flow direction of the gas to be tested is as follows: Figure 2 The small arrow and dashed line shown indicate the right air intake direction, and the right air intake internal circulation gas leakage state is suitable for testing the right air intake gas meter 18. When testing the gas meter 18, by adjusting the power supply voltage of the air pump 1, a static or dynamic real gas test of the gas meter 18 is achieved.

[0044] Embodiment 2:

[0045] like Figure 3 As shown, the difference between the second embodiment and the first embodiment is that it also includes a second gas charging port 19, a second gas outlet 20, an eighth ball valve 21, a ninth ball valve 22, a tenth ball valve 23 and an eleventh ball valve 24. The second gas charging port 19 is arranged at the first end of the gas meter installation assembly 3, and the second gas outlet 20 is arranged at the second end of the gas meter installation assembly 3. The eighth ball valve 21 is arranged on the second gas charging port 19, the ninth ball valve 22 is arranged on the second gas outlet 20, the tenth ball valve 23 is arranged between the first end of the second branch pipe 6 and the second gas charging port 19, and the eleventh ball valve 24 is arranged between the second end of the first branch pipe 5 and the second gas outlet 20. Specifically, after replacing the gas meter 18 fixed on the gas meter installation assembly 3, since the new gas meter 18 is filled with air, it is necessary to perform gas replacement again. The second charging port 19 and the second gas outlet 20 are respectively arranged at both ends of the gas meter installation component 3, so that the gas can be directly replaced from the front and rear ends of the gas meter installation component 3 when the gas replacement is repeated, which can greatly shorten the gas replacement time and the injection amount of the standard gas. After the gas replacement is completed, the second charging port 19 and the second gas outlet 20 are closed, and the tenth ball valve 23 and the eleventh ball valve 24 are opened to prevent air from mixing into the real gas circulation detection equipment. It is preferred to connect the pressure gauge 16 in series between the tenth ball valve 23 and the eleventh ball valve 24. When the gas is replaced after the gas meter 18 is replaced, the pressure gauge 16 can be used to detect whether the pipeline between the tenth ball valve 23 and the eleventh ball valve 24 is leaking, so as to ensure the safe operation of the equipment.

[0046] The working principle of the real gas circulation detection device of the second embodiment is as follows:

[0047] Inflation state: the first ball valve 9 is open, the second ball valve 10 is closed, the third ball valve 11 is open, and the fourth ball valve 12, the fifth ball valve 13, the sixth ball valve 14, the seventh ball valve 15, the tenth ball valve 23 and the eleventh ball valve 24 are all open, the eighth ball valve 21 is closed, and the ninth ball valve 22 is closed; the gas to be tested is charged from the first inflation port 7, the air pump 1 is turned on, the gas to be tested passes through the entire loop air pipe and is discharged from the first outlet 8, and at the same time, the sound velocity display function of the gas meter 18 is used to detect the concentration of the gas in the loop air pipe. When the concentration reaches the preset concentration, the first ball valve 9 and the third ball valve 11 are closed, and the second ball valve 10 is opened to complete the gas replacement in the real gas circulation detection equipment.

[0048] The state of gas leakage in the left intake internal circulation: the first ball valve 9 is closed, the second ball valve 10 is opened, the third ball valve 11 is closed, the fourth ball valve 12 is opened, the fifth ball valve 13 is closed, the sixth ball valve 14 is closed, the seventh ball valve 15 is opened, the eighth ball valve 21 is closed, the ninth ball valve 22 is closed, the tenth ball valve 23 is opened, and the eleventh ball valve 24 is opened. Turn on the air pump 1. The flow direction of the gas to be tested is as follows: Figure 3 The left air intake direction is indicated by the large arrow and dotted line, and the gas leakage state of the left air intake internal circulation is suitable for detecting the left air intake gas meter 18. When detecting the gas meter 18, by adjusting the power supply voltage of the air pump 1, a static or dynamic real gas test of the gas meter 18 is achieved.

[0049] Right intake internal circulation gas leakage state: the first ball valve 9 is closed, the second ball valve 10 is open, the third ball valve 11 is closed, the fourth ball valve 12 is closed, the fifth ball valve 13 is open, the sixth ball valve 14 is open, the seventh ball valve 15 is closed, the eighth ball valve 21 is closed, the ninth ball valve 22 is closed, the tenth ball valve 23 is open, and the eleventh ball valve 24 is open. Turn on the air pump 1. The flow direction of the gas to be tested is as follows: Figure 3 The small arrow and dashed line indicate the right air intake direction, and the right air intake internal circulation gas leakage state is suitable for detecting the right air intake gas meter 18. When detecting the gas meter 18, by adjusting the power supply voltage of the air pump 1, a static or dynamic real gas test of the gas meter 18 is achieved.

[0050] The state of gas replacement after replacing the gas meter 18 is as follows: the eighth ball valve 21 is opened, the ninth ball valve 22 is opened, the tenth ball valve 23 is closed, the eleventh ball valve 24 is closed, and the other control ball valves remain unchanged. The gas to be tested is charged from the second filling port 19, and is discharged from the second gas outlet 20 after passing through the gas meter installation assembly 3. At the same time, the sound velocity display function of the gas meter 18 is used to detect the concentration of the gas in the pipeline between the tenth ball valve 23 and the eleventh ball valve 24. When the concentration reaches the preset concentration, the eighth ball valve 21 and the ninth ball valve 22 are closed, and the tenth ball valve 23 and the eleventh ball valve 24 are opened to complete the gas replacement in the actual gas circulation detection equipment.

[0051] The above description is only the preferred embodiment of the present invention. Those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the guidance of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the protection scope of the present invention.

Claims

1. A real gas circulation detection device suitable for a gas meter, characterized in that: The invention comprises an air pump (1), a standard flow meter (2), a gas meter installation assembly (3) and a plurality of control ball valves; the air pump (1), the standard flow meter (2), the gas meter installation assembly (3) and the plurality of control ball valves are connected in series via a loop air pipe; the loop air pipe is used to store the gas to be tested, and the air pump (1) is used to adjust the flow rate of the gas to be tested and drive the gas to be tested to circulate in the loop air pipe.

2. The real gas circulation detection device suitable for gas meters according to claim 1, characterized in that: The loop gas pipe comprises a main pipe (4), a first branch pipe (5) and a second branch pipe (6); the main pipe (4) is a ring-shaped gas pipe which connects the air pump (1), the standard flow meter (2) and the gas meter installation assembly (3) in series; the first branch pipe (5) and the second branch pipe (6) are both connected in parallel with the gas meter installation assembly (3), and the first end of the second branch pipe (6) is connected between the first end of the first branch pipe (5) and the first end of the gas meter installation assembly (3), and the second end of the first branch pipe (5) is connected between the second end of the second branch pipe (6) and the second end of the gas meter installation assembly (3).

3. The real gas circulation detection device suitable for gas meters according to claim 2, characterized in that: It also comprises a first charging port (7) and a first air outlet (8), wherein the first charging port (7) and the first air outlet (8) are arranged adjacent to each other, the first charging port (7) is arranged on the charging branch of the main pipeline (4), and the first air outlet (8) is arranged on the air outlet branch of the main pipeline (4); the first charging port (7) is used to charge the gas to be tested into the loop air pipe, and the first air outlet (8) is used to exhaust gas.

4. The real gas circulation detection device suitable for a gas meter according to claim 3, characterized in that: The multiple control ball valves include a first ball valve (9), a second ball valve (10), a third ball valve (11), a fourth ball valve (12), a fifth ball valve (13), a sixth ball valve (14) and a seventh ball valve (15); the first ball valve (9) is connected in series to the inflation branch, the second ball valve (10) is connected in series between the inflation branch and the outlet branch through the main pipeline (4), the third ball valve (11) is connected in series to the outlet branch, the fourth ball valve (12) is connected in series between the second end of the first branch pipe (5) and the second end of the second branch pipe (6) through the main pipeline (4), the fifth ball valve (13) is connected in series to the second branch pipe (6), the sixth ball valve (14) is connected in series to the first branch pipe (5), and the seventh ball valve (15) is connected in series between the first end of the first branch pipe (5) and the first end of the second branch pipe (6) through the main pipeline (4).

5. The real gas circulation detection device suitable for gas meter according to claim 4, characterized in that: It also includes a pressure gauge (16), which is connected in series to the first end of the gas meter installation assembly (3) or the second end of the gas meter installation assembly (3) through the main pipeline (4), and the pressure gauge (16) is used to monitor the state of the gas in the loop gas pipe.

6. The real gas circulation detection device suitable for gas meters according to claim 5, characterized in that: It also comprises two gas storage tanks (17), wherein the two gas storage tanks (17) are connected in series between the first gas outlet (8) and the standard flow meter (2) through the main pipeline (4), and the air pump (1) is arranged between the two gas storage tanks (17).

7. The real gas circulation detection device suitable for a gas meter according to claim 6, characterized in that: The gas meter installation assembly (3) comprises at least one gas meter installation position, and a gas meter (18) is fixed to each of the gas meter installation positions; when the gas meter installation assembly (3) comprises more than one gas meter installation position, the more than one gas meter installation positions are connected in series via the main pipeline (4).

8. The real gas circulation detection device suitable for a gas meter according to claim 7, characterized in that: It also includes a switch button, which is used to control the switch state of the control ball valve to adjust the actual air circulation detection equipment to the inflation state, the left air intake internal circulation air leakage state or the right air intake internal circulation air leakage state.

9. The real gas circulation detection device suitable for a gas meter according to claim 8, characterized in that: The gas meter installation assembly (3) further comprises a second air charging port (19), a second air outlet (20), an eighth ball valve (21), a ninth ball valve (22), a tenth ball valve (23) and an eleventh ball valve (24); the second air charging port (19) is arranged at the first end of the gas meter installation assembly (3); the second air outlet (20) is arranged at the second end of the gas meter installation assembly (3); the eighth ball valve (21) is arranged on the second air charging port (19); the ninth ball valve (22) is arranged on the second air outlet (20); the tenth ball valve (23) is arranged between the first end of the second branch pipe (6) and the second air charging port (19); and the eleventh ball valve (24) is arranged between the second end of the first branch pipe (5) and the second air outlet (20).

10. The real gas circulation detection device suitable for a gas meter according to any one of claims 1 to 9, characterized in that: The gas meter (18) fixed on the gas meter installation assembly (3) comprises an ultrasonic gas meter and / or a diaphragm gas meter.

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