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Gas ratio proportioning valve, multi-gas ratio proportioning combination valve and gas proportioning system

A technology of proportioning valves and gases, which is applied in the direction of multi-way valves, valve devices, engine components, etc., can solve the problems of reduced proportioning accuracy, inconvenient use, and difficult production and debugging, and achieves convenient production and debugging, high practical value, Intuitive and convenient effect of debugging

Active Publication Date: 2013-01-02
GENTECSHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] According to the present invention, when the above-mentioned existing proportioning valve is proportioned, there is no complete linear relationship between the concentration of the mixed gas and the displacement of the valve core, and the proportioning accuracy is affected by the nonlinear relationship, which makes it very difficult to adjust the production and reduce the proportioning accuracy. Extremely inconvenient to use; for this reason, the first purpose of the present invention is to provide a gas proportional valve for a gas mixing system, which can directly calculate the outlets of the main and auxiliary control channels according to the actual gas density Width ratio, establish a complete linear relationship between the concentration of the mixed gas and the displacement of the spool, and obtain a high-precision proportioning concentration. The position of the spool is controlled by the adjustment device, and the concentration of the mixed gas is directly indicated by the displacement of the spool, without the need for a gas analyzer. Monitor the concentration of mixed gas, and the debugging is intuitive and convenient

Method used

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  • Gas ratio proportioning valve, multi-gas ratio proportioning combination valve and gas proportioning system
  • Gas ratio proportioning valve, multi-gas ratio proportioning combination valve and gas proportioning system
  • Gas ratio proportioning valve, multi-gas ratio proportioning combination valve and gas proportioning system

Examples

Experimental program
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Effect test

Embodiment 1

[0052] see image 3 and Figure 4 , the gas proportioning valve involved in this embodiment includes a valve body 100 , a valve core 200 , and an adjustment indicating device 300 .

[0053] Among them, the valve body 100 is a three-chamber shell coaxially penetrated through the center, including the main air inlet chamber 101 on one side and the main air inlet port 111 communicating with it, and the auxiliary air inlet chamber 102 on the other side and the auxiliary inlet chamber communicating with it. The air port 112, the air mixture chamber 103 in the middle and the air outlet 113 communicating with it.

[0054] The valve core 200 is located in the center of the inner cavity of the valve body, coaxially matched with the inner cavity of the valve body 100, and isolates the main air intake cavity 101, the auxiliary air intake cavity 102, and the mixed air cavity 103 of the valve body 100 from each other, wherein the valve At least one of the spool 200 on the side 101 of the...

Embodiment 2

[0086]The gas proportional proportioning valve involved in this embodiment is basically the same as the first embodiment, only an isolation ring 121 is added in the middle of the middle mixing chamber 103, and the isolation ring 121 divides the central inlet of the mixing chamber 103 into two parts, and the isolation ring 121 The axial length A is equal to the distance T between the outlets 211 and 212 of the main and auxiliary control passages in the spool 200 .

[0087] The initial working state of this embodiment is as Figure 5 As shown, its proportional adjustment state is as Figure 6 As shown, on the spool 200, the direction of the pressure difference between the auxiliary gas side pressure and the main gas side pressure is opposite to the moving direction of the spool. 212 moves in the direction of closing, as shown in formula (c), it also moves in the direction of concentration reduction. The larger the pressure difference between the auxiliary gas side pressure and ...

Embodiment 3

[0089] In practical applications, the adjustment range of the gas ratio concentration is generally not greater than 50%. When the concentration is greater than 50%, the concentration is still less than 50% after the main and auxiliary air intakes are reversed. The proportioning valve involved in this embodiment is this kind of proportioning valve, and its adjustment range is <50%.

[0090] The adjustment stroke S of the proportioning valve spool 200 does not need to be as long as in Examples 1 and 2. It is only necessary to ensure that the total width of the outlet 211 of the main control channel on the spool 200 and the total width of the outlet 212 of the auxiliary control channel have the following relationship within the range of the spool adjustment stroke:

[0091] B 1 / ρ 1 0.5 = B 2 / ρ 2 0.5 ,

[0092] That is to say, the linear relationship between the gas mixture concentration and the stroke of the valve core 200 in formula (c) can be achieved.

[0093] The o...

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Abstract

The invention discloses a gas ratio proportioning valve, a multi-gas ratio proportioning combination valve and a gas proportioning system. The proportioning valve consists of a valve body and a valve disk, wherein the valve body is provided with three cavities of which the centers are coaxially communicated, and the valve disk is provided with flow control channels. The valve disk moves in the cavities of the valve body, and the complete linear relationship of the concentration of mixed gas with the shift of the valve disk is realized. The multi-gas ratio proportioning combination valve consists of a plurality of gas ratio proportioning valves, wherein all main gas inlets are communicated, all mixed gas outlets are communicated, and auxiliary gases enter from the respective auxiliary gas inlets. The gas proportioning system comprises the gas ratio proportioning valve or the multi-gas ratio proportioning combination valve. According to the invention, the simple structures of the valve body and the valve disk are combined, the widths of the outlets of the main and auxiliary control channels in the valve disk are matched with the densities of the gases which need to be proportioned, and high-precise mixed bi- and multi-gas can be obtained through the control of only one button without a gas analyzer. The invention has high practical value and can be broadly used in mixed gas proportioning industry.

Description

technical field [0001] The invention relates to a gas proportioning valve for a gas mixing system. In particular, the present invention relates to the use of a unique gas proportioning valve to well control the proportioning accuracy of two gases in the gas mixing system through an external adjustment knob and dial. Background technique [0002] Many fields such as industry and medical treatment often require the use of mixed gases, such as industrial mixed gas shielded welding, different concentrations of oxygen-enriched gases for medical breathing, or mixed gas anti-corrosion in the food packaging industry. The generation of mixed gas requires precise proportioning of two or more simple gases to produce a mixed gas with an accurate concentration. [0003] At present, the gas mixing system is mostly used. The main air intake is throttled by the fixed hole, and the auxiliary air intake is controlled by a regulating valve. The proportioning concentration cannot be directly i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K11/06F16K11/22F16K37/00
Inventor 胡跃钢缪立峰
Owner GENTECSHANGHAI
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