Flow meter for detecting gas

Abstract

The utility model discloses a flow meter for detecting gas, which comprises a pair of connecting flanges, a detection pipe section is arranged between the connecting flanges for connection, a detection interface is arranged in the middle section of the detection pipe section, and a differential pressure orifice plate is arranged on the detection interface and inserted into a detection pipeline. Two sides of the detection pipe section are provided with a pair of detection ports, and the pair of detection ports are connected with a pair of differential pressure pipes; the utility model relates to the technical field of flow meters, in particular to a flow meter for detecting gas, which adopts a pair of differential pressure pipes to be communicated with a gas flow channel, a transfer pipe is connected to the pair of differential pressure pipes in a split manner through a connector, detection fluid is sealed in the transfer pipe through a piston, and gas only enters the differential pressure pipes and the transfer pipe. The piston is pushed through gas, the detection fluid sealed in the piston is used for pushing and extruding the differential pressure sensor, and therefore gas flow detection is achieved, the detection fluid does not make contact with the detection gas, and corrosion and influence on the detection result are avoided.

Description

Technical Field

[0001] This utility model relates to the field of flow meter technology, specifically to a flow meter for detecting gas. Background Technology

[0002] In modern safe production processes, in order to ensure production accuracy and product quality, it is necessary to accurately measure the gas used. At present, there are many types of gas metering equipment, and one of the most widely used gas flow devices is the orifice plate flow meter.

[0003] Currently, orifice plate flow meters for gas measurement mainly calculate the gas flow rate by detecting the pressure difference across the orifice plate. However, since the orifice plate flow meter is located at the detection interface, the gas directly acts on the pressure difference device. This causes the gas temperature to affect the detection results, and the gas is also prone to corroding the internal structure of the flow meter. Therefore, this case was developed to address these issues in depth. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a flow meter for detecting gases, thus solving the problems in the prior art.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a flow meter for detecting gas, comprising a pair of connecting flanges, a detection pipe section connected in the middle of the pair of connecting flanges, a detection interface provided in the middle section of the detection pipe section, a differential pressure orifice plate provided on the detection interface and inserted into the detection pipe, a pair of detection ports provided on both sides of the detection pipe section, and a pair of differential pressure pipes connected to the pair of detection ports.

[0006] A pair of differential pressure tubes are equipped with a pair of indirect detection and transmission components at their top ends, and a detection gauge is connected to the pair of indirect detection and transmission components.

[0007] The indirect detection and transmission assembly includes a transmission tube connected to a differential pressure tube, an adjusting piston installed inside the transmission tube, a detection fluid contained inside the transmission tube, the detection fluid being separated from the differential pressure tube, and a differential pressure sensor installed on the detection gauge, the differential pressure sensor being connected to the transmission tube.

[0008] The indirect detection and transmission assembly also includes protective rings. A pair of protective rings are provided at both ends of the transmission tube, and the diameter of the pair of protective rings is smaller than the diameter of the adjusting piston.

[0009] Preferably, the end of the transmission tube is connected to a horn-shaped enclosure, which covers the outside of the differential pressure sensor.

[0010] Preferably, the differential pressure orifice plate is a circular ring structure plate, and the differential pressure orifice plate is coaxial with the central axis of the detection pipe section.

[0011] Preferably, the test meter is equipped with a digital display, and a battery box is provided on the back of the test meter to power the test meter.

[0012] Preferably, the end of the differential pressure tube is provided with a connecting joint, which is threadedly connected to the transmission tube.

[0013] Preferably, a pair of control valves are provided on a pair of differential pressure pipes. Beneficial effects

[0014] This invention provides a flow meter for detecting gas. It offers the following advantages: The flow meter uses a pair of differential pressure tubes connected to a gas flow channel. A transfer tube is connected to the pair of differential pressure tubes via a connector. A detection fluid is sealed inside the transfer tube by a piston. Gas only enters the differential pressure tubes and the transfer tube. The gas pushes the piston, which in turn uses the sealed detection fluid inside the piston to compress the differential pressure sensor, thereby detecting the gas flow rate. Furthermore, the gas does not come into contact with the detected gas, avoiding corrosion and interference with the detection results. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural diagram of a gas flow meter according to the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of a gas flow meter according to the present invention.

[0017] Figure 3 This is a partial cross-sectional view of the flow meter for detecting gas according to the present invention.

[0018] In the diagram: 1. Connecting flange; 2. Detection pipe section; 3. Detection interface; 4. Differential pressure orifice plate; 5. Detection port; 6. Differential pressure pipe; 7. Detection gauge; 8. Transmission pipe; 9. Adjusting piston; 10. Differential pressure sensor; 11. Protective ring; 12. Sealing cover; 13. Digital display; 14. Connecting joint; 15. Control valve. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 This utility model provides an implementation scheme: In modern gas detection processes, the pipes on both sides of the commonly used orifice plate flowmeter need to be connected to the gas flow channel. In this way, the gas in the gas flow channel will enter the flowmeter, so the temperature of the fluid can easily affect the flowmeter's detection results, and some gases can also corrode the internal structure of the flowmeter.

[0021] According to the instruction manual Figure 1-3 As can be seen, in response to the above problems, this application discloses a flow meter for detecting gas, including a pair of connecting flanges 1. During the measurement process, the gas flow channel is connected through the pair of connecting flanges 1, and a detection pipe section 2 is provided in the middle of the pair of connecting flanges 1. The detection pipe section 2 serves as the main body for installing the detection equipment. A detection interface 3 is provided in the middle section of the detection pipe section 2. A differential pressure orifice plate 4 is provided on the detection interface 3 and inserted into the detection pipe. The differential pressure orifice plate 4 is used to create a pressure difference. The inner diameter of the differential pressure orifice plate 4 is smaller than the inner diameter of the detection pipe section 2, so that the gas pressure on both sides of the gas flow through the differential pressure orifice plate 4 is different. A pair of detection ports 5 are provided on both sides of the detection pipe section 2. A pair of differential pressure pipes 6 are connected to the pair of detection ports 5. The pair of differential pressure pipes 6 on the pair of detection ports 5 can connect the inner cavity of the detection pipe section 2 and transmit the pressure.

[0022] Then, according to the instruction manual attached Figure 1-3 It can be seen that a pair of indirect detection and transmission components are provided at the top of a pair of differential pressure tubes 6, and a detection gauge 7 is connected to the pair of indirect detection and transmission components. In the specific implementation process, the detection gauge 7 is connected to the differential pressure tube 6 through the indirect detection and transmission components. The air pressure of the differential pressure tube 6 acts on the indirect detection and transmission components, so that the air pressure acts on the detection gauge 7 through other media.

[0023] Then, according to the instruction manual attached Figure 1-3 It can be seen that the above-mentioned indirect detection and transmission assembly includes a transmission tube 8, which is connected to the differential pressure tube 6. An adjusting piston 9 is installed inside the transmission tube 8, and the transmission tube 8 contains a detection fluid. The detection fluid is separated from the differential pressure tube 6. A differential pressure sensor 10 is installed on the detection gauge 7, and the differential pressure sensor 10 is connected to the transmission tube 8.

[0024] The indirect detection and transmission assembly also includes a protective ring 11. A pair of protective rings 11 are provided at both ends of the transmission tube 8. The diameter of the pair of protective rings 11 is smaller than the diameter of the adjusting piston 9.

[0025] In the specific implementation process, the indirect detection and transmission component takes the transmission tube 8 as the main body. The two ends of the transmission tube 8 are connected to the detection gauge 7 and the differential pressure tube 6, respectively. The gas in the differential pressure tube 6 pushes the regulating piston 9 to move linearly in the transmission tube 8, which in turn drives the detection fluid to move. Since the pressures of the two differential pressure tubes 6 are different, the pressure of the detection fluid in the two transmission tubes 8 on the differential pressure sensor 10 is different, which makes the detection signals of the differential pressure sensor 10 different. Therefore, a pair of protective rings 11 are set at both ends of the transmission tube 8. The pair of protective rings 11 can limit the regulating piston 9 and prevent the regulating piston 9 from falling off the transmission tube 8.

[0026] As a preferred embodiment, the end of the transmission tube 8 is connected to a horn-shaped enclosure 12, which covers the outside of the differential pressure sensor 10. The differential pressure sensor 10 and the transmission tube 8 are connected through the enclosure 12 to achieve the transmission function.

[0027] As a preferred option, the differential pressure orifice plate 4 is a circular ring structure plate, and the differential pressure orifice plate 4 is coaxial with the central axis of the detection pipe section 2.

[0028] As a preferred option, the test meter 7 is further equipped with a digital display 13, and a battery box is provided on the back of the test meter 7 to power the test meter 7. The battery box contains a power supply battery to power the test meter 7, and the test results are displayed using the digital display 13.

[0029] As a preferred option, the differential pressure pipe 6 is further provided with a connecting joint 14 at its end, which is threadedly connected to the transmission pipe 8.

[0030] As a preferred option, a pair of control valves 15 are provided on the pair of differential pressure pipes 6. The pair of control valves 15 can close the pair of differential pressure pipes 6, making it easy to disassemble and maintain.

[0031] In summary, the gas flow meter uses a pair of differential pressure tubes 6 to connect the gas flow channel. A connecting joint 14 separates the two differential pressure tubes 6 into a transmission tube 8. The transmission tube 8 is sealed with a detection fluid by a piston. The gas only enters the differential pressure tubes 6 and the transmission tube 8. The gas pushes the piston, and the detection fluid sealed inside the piston pushes and squeezes the differential pressure sensor 10, thereby realizing the detection of gas flow. The gas does not come into contact with the detection gas, thus avoiding corrosion and affecting the detection results.

[0032] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flow meter for detecting gas, comprising a pair of connecting flanges (1), wherein a detection pipe section (2) is provided between the middle of the pair of connecting flanges (1), and a detection interface (3) is provided in the middle section of the detection pipe section (2), wherein a differential pressure orifice plate (4) is provided on the detection interface (3) and inserted into the detection pipe, characterized in that, A pair of detection ports (5) are provided on both sides of the detection pipe section (2), and a pair of differential pressure pipes (6) are connected to the pair of detection ports (5). A pair of differential pressure tubes (6) are provided with a pair of indirect detection and transmission components at their top ends, and a detection gauge (7) is connected to the pair of indirect detection and transmission components. The indirect detection and transmission assembly includes a transmission tube (8), which is connected to a differential pressure tube (6). An adjusting piston (9) is installed inside the transmission tube (8). The transmission tube (8) contains a detection fluid, which is separated from the differential pressure tube (6). A differential pressure sensor (10) is installed on the detection gauge (7), and the differential pressure sensor (10) is connected to the transmission tube (8). The indirect detection and transmission assembly also includes protective rings (11). A pair of protective rings (11) are provided at both ends of the transmission tube (8). The diameter of the pair of protective rings (11) is smaller than the diameter of the adjusting piston (9).

2. The gas flow meter according to claim 1, characterized in that, The end of the transmission tube (8) is connected to a horn-shaped enclosure (12), which covers the outside of the differential pressure sensor (10).

3. A flow meter for detecting gas according to claim 2, characterized in that, The differential pressure orifice plate (4) is a circular ring structure plate, and the differential pressure orifice plate (4) is coaxial with the central axis of the detection pipe section (2).

4. A flow meter for detecting gas according to claim 3, characterized in that, The test meter (7) is equipped with a digital display (13), and a battery box is provided on the back of the test meter (7) to power the test meter (7).

5. A flow meter for detecting gas according to claim 4, characterized in that, The differential pressure tube (6) is provided with a connecting joint (14) at its end, and the connecting joint (14) is threadedly connected to the transmission tube (8).

6. A flow meter for detecting gas according to claim 5, characterized in that, A pair of control valves (15) are provided on a pair of differential pressure pipes (6).

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