Flow control device for multi-path gas

Abstract

The utility model relates to the field of gas collection, and discloses a multi-path gas flow control device which comprises a plurality of collection pipelines which are installed in parallel, and a filter, a first valve, a pressure reducing valve, a second valve, a gas mass flow meter, a third valve and a first one-way valve are sequentially installed on each collection pipeline in the gas flow direction. The left side and the right side of the pressure reducing valve are provided with pressure gauges, the pressure gauges are fixedly installed on the collecting pipelines, air enters one ends of the collecting pipelines, the other ends of the collecting pipelines are all communicated with one end of an air feeding pipeline, and the other end of the air feeding pipeline penetrates through the top of the reaction pipe and extends to the bottom of the inner side of the reaction pipe. The top of the reaction tube is communicated with one end of an exhaust tube, and the other end of the exhaust tube is provided with a valve IV. According to the utility model, each collection pipeline is used as an independent unit and is convenient to mount, dismount and combine, the flexibility and adaptability of the system are improved, the plurality of collection pipelines can work in parallel, and the gas collection and treatment efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas collection field, concretely is the flow control device of multichannel gas. BACKGROUND

[0002] In the laboratory environment, often need to collect, analyze and handle multiple gas to meet the scientific research, product development, quality control and other needs.

[0003] At present, can only collect gas sample one by one, cannot collect multiple gas samples simultaneously, and the accurate control of the collected gas flow is difficult to realize. UTILITY MODEL CONTENT

[0004] In order to overcome the above insufficient, the utility model provides the flow control device of multichannel gas.

[0005] The utility model takes the technical scheme:

[0006] The flow control device of multichannel gas, including collection pipeline, multiple collection pipelines are installed in parallel, filter, valve one, pressure reducing valve, valve two, gas mass flowmeter, valve three and check valve one are installed in sequence on each collection pipeline along the direction of airflow, and the left and right sides of the pressure reducing valve are provided with pressure gauges, and the two pressure gauges are arranged between valve one and the pressure reducing valve and between the pressure reducing valve and valve two respectively; the pressure gauge is arranged on each collection pipeline, one end of the collection pipeline is provided with an air inlet, the other end of the multiple collection pipelines is communicated with one end of the gas supply pipeline, the other end of the gas supply pipeline penetrates through the top of the reaction tube and extends to the inside bottom of the reaction tube, check valve two is installed on the gas supply pipeline, one end of the exhaust pipe is communicated with the top of the reaction tube, and valve four is installed on the other end of the exhaust pipe.

[0007] The utility model has the advantages of:

[0008] Each collection pipeline of the utility model serves as an independent unit, is convenient to install, dismount and combine, improves the flexibility and adaptability of the system, the unit module design form improves the stability and reliability of the system, the failure of a single pipeline does not affect the normal work of other pipelines, multiple collection pipelines can work in parallel, and the efficiency of gas collection and processing is greatly improved.

[0009] The cooperation of the pressure reducing valve and the pressure gauge ensures the stability and controllability of the gas pressure, and the gas mass flowmeter provides accurate flow measurement, which helps to realize accurate control of the gas flow.

[0010] The filter effectively removes impurities and particulate matter in the gas, protects the subsequent equipment and chemical reaction, and the arrangement of check valve one and check valve two prevents backflow and leakage of the gas, and improves the safety of the system. DRAWING EXPLANATION

[0011] Figure 1 is a structural schematic diagram of the utility model.

[0012] In all the drawings, the reference signs are specifically: 1, collecting pipeline; 2, filter; 3, valve one; 4, pressure reducing valve; 5, pressure gauge; 6, gas mass flowmeter; 7, valve two; 8, valve three; 9, one-way valve one; 10, gas feeding pipeline; 11, reaction tube; 12, one-way valve two; 13, exhaust pipe; 14, valve four; 15, gas. DETAILED DESCRIPTION

[0013] As Figure 1 shown: the flow control device of multiple gases, including collecting pipeline 1, multiple collecting pipelines 1 are installed in parallel, filter 2, valve one 3, pressure reducing valve 4, valve two 7, gas mass flowmeter 6, valve three 8 and one-way valve one 9 are installed in sequence along the air flow direction on each collecting pipeline 1, pressure reducing valve 4 has pressure gauge 5 on the left and right sides, two pressure gauges 5 are respectively between valve one 3 and pressure reducing valve 4 and between pressure reducing valve 4 and valve two 7; pressure gauge 5 is arranged on each collecting pipeline 1, one end of collecting pipeline 1 is gas inlet, the other end of multiple collecting pipelines 1 is communicated with one end of gas feeding pipeline 10, the other end of gas feeding pipeline 10 penetrates through the top of reaction tube 11 and extends to the inside bottom of reaction tube 11, one-way valve two 12 is installed on gas feeding pipeline 10, the top of reaction tube 11 is communicated with one end of exhaust pipe 13, the other end of exhaust pipe 13 is installed valve four 14.

[0014] According to the test requirements, the required number of collecting pipelines 1 is selected and installed.

[0015] Valve one 3 is opened, the leftmost end of collecting pipeline 1 is connected with gas 15, and gas 15 is allowed to enter the leftmost end of collecting pipeline 1, and the filter 2 on each collecting pipeline 1 first carries out preliminary purification of gas 15 to remove impurities and particulate matter.

[0016] The gas passes through the pressure reducing valve 4 for pressure regulation, to ensure that the pressure of the gas 15 is within a safe and suitable range, and the pressure gauges 5 on the left and right sides of the pressure reducing valve 4 can monitor the pressure of the gas 15 in real time, to ensure the pressure reducing effect.

[0017] The gas 15 continues to flow, valve two 7 and valve three 8 are opened, and the gas passes through valve two 7 to enter the gas mass flowmeter 6 for flow measurement, which is crucial for accurately controlling the amount of gas entering the reaction tube 11, and the gas enters the one-way valve one 9 through the valve three 8 to prevent backflow of the gas 15.

[0018] The gas 15 of multiple collecting pipelines 1 converges in the gas feeding pipeline 10, and the one-way valve two 12 ensures that the gas 15 can only flow to the reaction tube 11 in one direction.

[0019] Gas 15 is ejected from the end of gas feed line 10 into the bottom inside of reaction tube 11 to undergo a predetermined chemical reaction or treatment.

[0020] Reaction gas 15 is exhausted through exhaust line 13, and valve 14 is used to control the exhaust process, which can be closed to collect or analyze gas 15 when needed.

[0021] The utility model only protects the mechanical part, and the function realized by the software control part related thereto is not in the protection range of the utility model.

Claims

1. A flow control device for multiple gases, characterized by, The application relates to a gas sampling device, which comprises a plurality of sampling pipelines (1) installed in parallel, a filter (2), a valve (3), a pressure reducing valve (4), a valve (7), a gas mass flow meter (6), a valve (8) and a one-way valve (9) are sequentially installed on each sampling pipeline (1) along the airflow direction; the left and right sides of the pressure reducing valve (4) are provided with pressure gauges (5), and the two pressure gauges (5) are respectively arranged between the valve (3) and the pressure reducing valve (4) and between the pressure reducing valve (4) and the valve (7); the pressure gauges (5) are arranged on each sampling pipeline (1), one end of the sampling pipeline (1) is provided with an air inlet, the other end of the plurality of sampling pipelines (1) is communicated with one end of a gas feeding pipeline (10), the other end of the gas feeding pipeline (10) penetrates through the top of a reaction pipeline (11) and extends to the inside bottom of the reaction pipeline (11), a one-way valve (12) is arranged on the gas feeding pipeline (10), one end of an exhaust pipeline (13) is communicated with the top of the reaction pipeline (11), and the other end of the exhaust pipeline (13) is provided with a valve (14).

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