Gas flow calibration device

Abstract

The utility model discloses a gas flow calibration device, which belongs to the technical field of calibration devices, aims to solve the problems that more pagoda heads of various types need to be prepared and the connection is very inconvenient when different types of metering equipment are detected, and comprises a shell, two connecting pipes are distributed on the side surface of the shell, an operation panel is installed on the surface of the shell, an air guide pipe is installed in the connecting pipe, the air guide pipe penetrates through and extends into the shell and is connected with a soap film flowmeter, a pipeline of metering equipment is arranged outside the air guide pipe in a sleeving mode, then the sealing power set works, and therefore the external pressure air bag and the internal top air bag are inflated. Therefore, the external pressure air bag is in close contact with the outer wall of the pipeline, the internal top air bag is in close contact with the inner wall of the pipeline, sealing connection operation of the pipeline and the air guide pipe of the metering equipment is completed, a traditional pagoda head connecting structure is replaced, and connection operation of pipelines of different specifications is facilitated.

Description

Technical Field

[0001] The utility model discloses a gas flow calibration device, which belongs to the technical field of calibration devices, and specifically relates to the technical field of gas flow calibration. Background Art

[0002] Gas flow measurement is an important parameter in energy metering and is widely used in metering and charging gas meters, natural gas meters, and heat meters for heating. These metering devices need to be calibrated before use or after a certain period of use. When connecting the equipment to the device to be tested, a hose is usually connected to the pagoda connector of the equipment. The hose is clamped to the outside of the pagoda connector by clipping, which is very laborious. Moreover, one pagoda head can only connect to one specification of hose. Therefore, when testing different types of metering equipment, it is necessary to prepare a large number of pagoda heads, which makes the connection very inconvenient. Utility Model Content

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a gas flow calibration device, thereby solving the problem that when testing different types of measuring equipment, it is necessary to prepare a large number of types of pagoda heads and the connection is inconvenient.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A gas flow calibration device comprises a shell, two connecting tubes are distributed on the side of the shell, an operation panel is installed on the surface of the shell, an air guide tube is installed inside the connecting tube, the air guide tube passes through and extends to the interior of the shell and is connected to a soap film flowmeter, an inner top air bag is fixed to the outside of the air guide tube, an external pressure air bag is installed on the inner wall of the connecting tube at a position corresponding to the inner top air bag, and a sealed power group for adjusting the filling degree of the external pressure air bag and the inner top air bag is provided inside the shell.

[0006] As a preferred technical solution of the present invention, an inspection port is opened on the side of the shell, a sealing plate is clamped inside the inspection port, a lifting strap is installed on the top of the shell through a limiting buckle, a protruding frame is provided on the shell at a position corresponding to the outside of the operation panel, and an electric control box and a battery pack are installed inside the shell.

[0007] As a preferred technical solution of the present invention, the air duct includes a main pipe arranged inside the shell and connected to the soap film flowmeter, a transfer pipe is installed on the side of the main pipe, and a mounting groove for fixing the inner top airbag is installed on the outside of the transfer pipe.

[0008] As an optimal technical solution of the present invention, the side surface of the inner top airbag is installed and then sleeved on the limiting sleeve outside the transfer tube. A through hole is provided between the limiting sleeve and the inner top airbag. A transfer bin is installed on the side surface of the limiting sleeve. The transfer bin and the external pressure airbag are connected through an L-shaped air pipe.

[0009] As an optimal technical solution of the present invention, the sealed power group includes an air pump and an air extraction pump installed inside the shell. The air pump and the air extraction pump are both connected to the L-shaped air pipe through conduit 2, and a one-way valve is installed between the air pump and conduit 2 and between the air extraction pump and conduit 2.

[0010] As an optimal technical solution of the present invention, an electromagnetic valve 1 is installed on the second conduit between the L-shaped trachea and the one-way valve, a conduit 1 is installed on the side of the conduit 2 between the first solenoid valve and the one-way valve, the side of the conduit 1 is connected to the inner cavity of the connecting pipe, a pressure sensor is installed on the side of the connecting pipe, and an electromagnetic valve 2 is installed on the first conduit.

[0011] Compared with the prior art, the beneficial effect of the present invention is that the pipeline of the metering equipment is put on the outside of the air guide tube, and then the sealing power group works to inflate the external pressure airbag and the inner top airbag, so that the external pressure airbag is in close contact with the outer wall of the pipeline, and the inner top airbag is in close contact with the inner wall of the pipeline, thereby completing the sealed connection operation between the pipeline of the metering equipment and the air guide tube, thereby replacing the traditional pagoda head connection structure, and facilitating the connection operation of pipelines of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0014] Figure 3 This is a partial enlarged view of the A1 end of the present utility model;

[0015] 1-shell; 11-inspection port; 12-sealing plate; 13-limiting buckle; 14-lifting strap; 15-frame; 16-electrical control box; 17-battery pack; 18-fixing bracket; 2-connecting pipe; 3-operation panel; 4-air duct; 41-main pipe; 42-transfer pipe; 43-installation slot; 5-external pressure airbag; 6-internal top airbag; 62-limiting sleeve; 63-through hole; 64-transfer chamber; 7-L-type air pipe; 8-soap film flowmeter; 9-sealed power group; 91-inflating pump; 92-exhaust pump; 93-one-way valve; 94-solenoid valve 1; 95-conduit 1; 96-solenoid valve 2; 97-pressure sensor; 98-conduit 2. DETAILED DESCRIPTION

[0016] 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.

[0017] See also Figure 1-3 , the utility model provides a technical solution:

[0018] A gas flow calibration device includes a shell 1, with two connecting pipes 2 distributed on the side of the shell 1, and an operation panel 3 is installed on the surface of the shell 1, which facilitates operation. An air guide pipe 4 is installed inside the connecting pipe 2, which passes through and extends to the interior of the shell 1 and is connected to a soap film flowmeter 8. One of the two connecting pipes 2 is an air inlet pipe connected to the air inlet end of the soap film flowmeter 8, and the other is an air outlet pipe connected to the air outlet end of the soap film flowmeter 8. An inner top airbag 6 is fixed to the outside of the air guide pipe 4, and an external pressure airbag 5 is installed on the inner wall of the connecting pipe 2 at a position corresponding to the inner top airbag 6. By inflating the interior of the external pressure airbag 5 and the inner top airbag 6, it is convenient to connect the pipeline of the measuring equipment through the external pressure airbag 5 and the inner top airbag 6, and it can realize the connection operation of pipelines of different specifications. A sealing power group 9 for adjusting the filling degree of the external pressure airbag 5 and the inner top airbag 6 is provided inside the shell 1, and the gas volume inside the external pressure airbag 5 and the inner top airbag 6 is adjusted by the sealing power group 9.

[0019] An inspection port 11 is provided on the side of the shell 1, and a sealing plate 12 is clamped inside the inspection port 11. A lifting strap 14 is installed on the top of the shell 1 through a limiting buckle 13. A protruding frame 15 is provided on the shell 1 at a position corresponding to the outside of the operation panel 3, thereby providing a certain degree of protection for the operation panel 3. An electric control box 16 and a battery pack 17 are installed inside the shell 1.

[0020] The air duct 4 includes a main pipe 41 arranged inside the shell 1 and connected to the soap film flowmeter 8. A transfer pipe 42 is installed on the side of the main pipe 41. A mounting groove 43 for fixing the inner top airbag 6 is installed on the outside of the transfer pipe 42, so that the air flow can flow along the direction of the transfer pipe 42 and the main pipe 41 into the interior of the soap film flowmeter 8. The shell 1 is set to a transparent structure, which facilitates observation of the soap film flowmeter 8.

[0021] After the side of the inner top airbag 6 is installed, it is sleeved on the limiting sleeve 62 on the outside of the transfer tube 42. A through hole 63 is opened between the limiting sleeve 62 and the inner top airbag 6. A transfer bin 64 is installed on the side of the limiting sleeve 62. The transfer bin 64 is connected to the external pressure airbag 5 through an L-shaped air pipe 7, so that the airflow used to adjust the size of the inner top airbag 6 can enter the interior of the inner top airbag 6 along the direction of the transfer bin 64, the transfer tube 42, and the through hole 63. The transfer bin 64 also plays a certain limiting role, so that the pipeline of the metering equipment cannot be inserted too deep into the interior of the connecting pipe 2.

[0022] The sealing power group 9 includes an inflation pump 91 and an exhaust pump 92 installed inside the shell 1. The inflation pump 91 and the exhaust pump 92 are both connected to the L-shaped air pipe 7 through the second conduit 98. A one-way valve 93 is installed between the inflation pump 91 and the second conduit 98 and between the exhaust pump 92 and the second conduit 98. By controlling the operation of the inflation pump 91 and the exhaust pump 92, it is convenient to control the size of the external pressure airbag 5 and the internal top airbag 6, thereby realizing the fixing and loosening operations of the pipeline of the metering equipment. Since the pipeline specifications of the metering equipment are determined, they can be preset in the electrical control box 16, thereby facilitating the rapid connection and sealing operations of pipelines of different specifications.

[0023] A solenoid valve 1 94 is installed on the conduit 2 98 between the L-shaped air pipe 7 and the one-way valve 93, and a conduit 1 95 is installed on the side of the conduit 2 98 between the solenoid valve 1 94 and the one-way valve 93. The side of the conduit 1 95 is connected to the inner cavity of the connecting pipe 2, and a pressure sensor 97 is installed on the side of the connecting pipe 2. A solenoid valve 2 96 is installed on the conduit 1 95. After the pipeline is sealed by the external pressure airbag 5 and the inner top airbag 6, the operation panel 3 is operated to make the electric control box 16 close the solenoid valve 1 94 and open the solenoid valve 2 96, and at the same time make the inflation pump 91 work, thereby performing an inflation operation in the closed area formed by the connection between the external pressure airbag 5, the pipeline and the inner top airbag 6 and the connecting pipe 2. After a certain amount of gas is filled, the pressure is released. The force sensor 97 detects the air pressure inside it. If the data detected by the pressure sensor 97 increases first and then decreases, it means that the connection position of the external pressure airbag 5, the pipeline and the inner top airbag 6 is not strictly sealed, and the calibration operation cannot be performed. It is necessary to close the solenoid valve 2 96 and open the solenoid valve 1 94 through the electrical control box 16 to inflate the interior of the external pressure airbag 5 and the inner top airbag 6 again. After inflation, the above operation is repeated until the data detected by the pressure sensor 97 is used. The data detected by the pressure sensor 97 first increases and then remains unchanged. Because the data detected by the pressure sensor 97 first increases and then remains unchanged, it means that the connection position of the external pressure airbag 5, the pipeline and the inner top airbag 6 is strictly sealed, and the calibration operation of the measuring equipment can be performed.

[0024] During calibration, connect the pipe of the metering equipment to the connecting pipe 2, and operate through the operation panel 3, so that the electronic control box 16 opens the solenoid valve 1 94 and closes the solenoid valve 2 96, and at the same time, the air pump 91 is operated, thereby inflating the interior of the external pressure airbag 5 and the inner top airbag 6, thereby achieving a sealed connection between the pipe of the metering equipment and the connecting pipe 2, and then the electronic control box 16 closes the solenoid valve 1 94, opens the solenoid valve 2 96, and at the same time, the air pump 91 is operated, thereby inflating the closed area formed between the external pressure airbag 5, the pipe and the inner top airbag 6 after they are connected to the connecting pipe 2. After a certain amount of gas is filled, the internal air pressure is detected by the pressure sensor 97. If the data detected by the pressure sensor 97 first increases and then decreases, it means that the connection position of the external pressure airbag 5, the pipe and the inner top airbag 6 is not strictly sealed and cannot be calibrated. For the calibration operation, it is necessary to close the solenoid valve 2 96 through the electronic control box 16 again and open the solenoid valve 1 94, thereby pressing the airbag 5 outward and the interior of the inner top airbag 6 to inflate again. After inflation, the above operation is repeated until the data detected by the pressure sensor 97 increases and then remains unchanged. Then, the gas entering from one connecting pipe 2 passes through the soap film flowmeter 8 and is discharged from the other connecting pipe 2. Finally, the calibration operation is performed through the operation panel 3. The gas flow rate is measured by the soap film flowmeter 8, and the calibration value can be observed through the display screen in the operation panel 3. Finally, the gas flow calibration is completed. After the calibration is completed, observe whether the value of the gas metering device is consistent with the value of the calibration device. If the values ​​are consistent, there is no need to adjust the gas metering device. If the values ​​are inconsistent, the gas metering device needs to be adjusted according to the calibration value of the calibration device.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas flow calibration device, comprising a housing (1), characterized in that: Two connecting tubes (2) are distributed on the side of the shell (1), an operating panel (3) is installed on the surface of the shell (1), an air guide tube (4) is installed inside the connecting tube (2), the air guide tube (4) passes through and extends to the inside of the shell (1) and is connected to a soap film flowmeter (8), an inner top air bag (6) is fixed on the outside of the air guide tube (4), an external pressure air bag (5) is installed on the inner wall of the connecting tube (2) at a position corresponding to the inner top air bag (6), and a sealing power group (9) for adjusting the filling degree of the external pressure air bag (5) and the inner top air bag (6) is provided inside the shell (1).

2. A gas flow calibration device according to claim 1, characterized in that: An inspection opening (11) is provided on the side of the shell (1), a sealing plate (12) is clamped inside the inspection opening (11), a lifting belt (14) is installed on the top of the shell (1) through a limit buckle (13), a protruding frame (15) is provided on the shell (1) at a position corresponding to the outside of the operation panel (3), and an electric control box (16) and a battery pack (17) are installed inside the shell (1).

3. A gas flow calibration device according to claim 1, characterized in that: The air guide tube (4) comprises a main pipe (41) arranged inside the housing (1) and connected to the soap film flowmeter (8), a transfer pipe (42) is installed on the side of the main pipe (41), and a mounting groove (43) for fixing the inner top airbag (6) is installed on the outside of the transfer pipe (42).

4. A gas flow calibration device according to claim 1, characterized in that: The side of the inner top airbag (6) is installed and then sleeved on a limiting sleeve (62) outside the transfer tube (42). A through hole (63) is provided between the limiting sleeve (62) and the inner top airbag (6). A transfer bin (64) is installed on the side of the limiting sleeve (62). The transfer bin (64) is connected to the external pressure airbag (5) via an L-shaped air pipe (7).

5. A gas flow calibration device according to claim 1, characterized in that: The sealed power group (9) comprises an air pump (91) and an air extraction pump (92) installed inside the housing (1). The air pump (91) and the air extraction pump (92) are both connected to the L-shaped air pipe (7) via a second conduit (98). A one-way valve (93) is installed between the air pump (91) and the second conduit (98), and between the air extraction pump (92) and the second conduit (98).

6. A gas flow calibration device according to claim 5, characterized in that: A solenoid valve (94) is installed on the second conduit (98) between the L-shaped air pipe (7) and the one-way valve (93), a conduit (95) is installed on the side of the second conduit (98) between the first solenoid valve (94) and the one-way valve (93), the side of the conduit (95) is connected to the inner cavity of the connecting pipe (2), a pressure sensor (97) is installed on the side of the connecting pipe (2), and a solenoid valve (96) is installed on the first conduit (95).

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