CN221131716U - Dynamic gas diluting device - Google Patents

Abstract

The utility model relates to a dynamic gas dilution device, which belongs to the technical field of dynamic gas dilution and comprises: a feed gas line having a first inlet and a first outlet; a first dilution gas line having a second inlet and a second outlet; the first mixed gas pipeline is provided with a first mixed gas inlet and a first mixed gas outlet, the first outlet and the second outlet are connected to the first mixed gas outlet, and the first mixed gas outlet outputs primary mixed gas; a second dilution gas line having a third inlet and a third outlet; and the second mixed gas pipeline is provided with a second mixed gas inlet and a second mixed gas outlet, the first mixed gas outlet and the third outlet are connected to the second mixed gas inlet, and the second mixed gas outlet outputs the second mixed gas. The gas dynamic dilution device realizes the large-scale dilution of the raw material gas by carrying out at least two dilutions on the raw material gas.

Description

Dynamic gas diluting device

Technical Field

The utility model relates to the technical field of dynamic dilution of gas, in particular to a dynamic dilution device of gas.

Background

The dynamic dilution of gas is a process of continuously mixing the raw material gas with known concentration and the diluent gas into a mixing cavity according to a constant proportion, so as to continuously prepare the mixed gas with a certain concentration. And calculating the dilution ratio according to the flow ratio of the raw material gas and the diluent gas, and calculating the concentration of the mixed gas according to the dilution ratio.

Fig. 1 shows a schematic diagram of one of the prior art gas dynamic diluting devices. As shown in fig. 1, the gas dynamic diluting device includes a raw gas pipeline 100, a first dilution gas pipeline 200 and a first mixed gas pipeline 300, wherein an outlet of the raw gas pipeline 100 and an outlet of the first dilution gas pipeline 200 are connected to an inlet of the first mixed gas pipeline 300, so that the raw gas and the dilution gas can be mixed with each other to form a mixed gas. The raw material gas pipeline 100 is provided with a first air resistor 110, the front end of the first air resistor 110 is connected with a first pressure adjusting component 120, and the first pressure adjusting component 120 is used for adjusting the pressure of the front end of the first air resistor 110, so that the pressure difference between the front end and the rear end of the first air resistor 110 is changed, and the flow of raw material gas flowing through the first air resistor 110 is controlled. The first air-diluting air pipeline 200 is provided with a second air resistor 210, the front end of the second air resistor 210 is connected with a second pressure adjusting component 220, and the second pressure adjusting component 220 is used for adjusting the pressure of the front end of the second air resistor 210 so as to change the pressure difference between the front end and the rear end of the second air resistor 210, thereby controlling the flow of the diluting air flowing through the second air resistor 210. It can be seen that the dynamic dilution device for gas in the prior art can realize dynamic mixing of raw material gas and diluent gas.

However, the maximum dilution ratio of the gas dynamic diluting device described above is about 2000 times, and it is difficult to further increase the dilution ratio for the following reasons:

In order to increase the dilution ratio, the flow rate of the raw material gas can be reduced; and/or increasing the flow of dilution gas.

For reducing the flow rate of the raw gas, a smaller pore size of the gas lock can be used, however, a smaller pore size of the gas lock means easier blocking, and the influence of blocking on the flow rate is also amplified, and in addition, a smaller pore size of the gas lock requires higher cost.

For increasing the flow rate of the dilution gas, the pressure of the front end of the second air resistor needs to be increased, so that more dilution gas is needed, and the cost is increased.

It follows that the prior art gas dynamic dilution apparatus cannot dilute in a greater proportion.

Disclosure of utility model

The embodiment of the utility model aims to provide a gas dynamic dilution device, which realizes large-scale dilution of raw material gas by means of at least twice dilution of the raw material gas.

To achieve the above object, an embodiment of the present utility model provides a gas dynamic diluting device, including:

A feed gas line having a first inlet and a first outlet, the first inlet inputting feed gas;

A first dilution gas line having a second inlet and a second outlet, the second inlet inputting a dilution gas;

The first mixed gas pipeline is provided with a first mixed gas inlet and a first mixed gas outlet, the first outlet and the second outlet are connected to the first mixed gas outlet, and the first mixed gas outlet outputs primary mixed gas formed by mixing raw material gas and diluent gas;

a second dilution gas line having a third inlet and a third outlet, the third inlet inputting a dilution gas; and

The second mixed gas pipeline is provided with a second mixed gas inlet and a second mixed gas outlet, the first mixed gas outlet and the third outlet are connected to the second mixed gas inlet, and the second mixed gas outlet outputs a second mixed gas formed after the first mixed gas and the diluent gas are mixed.

In some embodiments of the present invention, in some embodiments,

The feed gas line further comprises: a first air lock disposed between the first inlet and the first outlet; and/or

The first dilution gas circuit further includes: a second air lock disposed between the second inlet and the second outlet; and/or

The first gas mixture pipeline further comprises: the third air resistor is arranged between the first mixed gas inlet and the first mixed gas outlet; and/or

The second dilution gas circuit further includes: and a fourth air lock disposed between the third inlet and the third outlet.

In some embodiments of the present invention, in some embodiments,

The feed gas line further comprises: the first pressure adjusting component is arranged at the front end of the first air resistor; and/or

The first dilution gas circuit further includes: the second pressure adjusting component is arranged at the front end of the second air resistor; and/or

The first gas mixture pipeline further comprises: the third pressure adjusting component is arranged at the front end of the third air resistor; and/or

The second dilution gas circuit further includes: and the fourth pressure adjusting assembly is arranged at the front end of the fourth air resistor.

In some embodiments of the present invention, in some embodiments,

The first pressure regulating assembly includes: the inlet of the first electronic flow controller is connected with the front end of the first air resistor, and the first electronic flow controller discharges raw gas at the front end of the first air resistor so as to adjust the pressure at the front end of the first air resistor; and/or

The second pressure regulating assembly includes: the inlet of the second electronic flow controller is connected with the second inlet, and the outlet of the second electronic flow controller is connected with the front end of the second air resistor; and/or

The third pressure regulating assembly includes: the inlet of the third electronic flow controller is connected with the front end of the third air resistor, and the third electronic flow controller discharges the mixed gas at the front end of the third air resistor so as to adjust the pressure at the front end of the third air resistor; and/or

The fourth pressure regulating assembly includes: and the inlet of the fourth electronic flow controller is connected with the third inlet, and the outlet of the fourth electronic flow controller is connected with the front end of the fourth air resistor.

In some embodiments of the present invention, in some embodiments,

The feed gas line further comprises: the first inlet is positioned at the front end of the fifth air resistor, and the rear end of the fifth air resistor is positioned at the front end of the inlet of the first pressure regulating component; and/or

The first dilution gas circuit further includes: the second inlet is positioned at the front end of the sixth air resistor, and the rear end of the sixth air resistor is positioned at the front end of the inlet of the second pressure regulating component; and/or

The second dilution gas circuit further includes: and the third inlet is positioned at the front end of the seventh air resistor, and the rear end of the seventh air resistor is positioned at the front end of the inlet of the fourth pressure regulating assembly.

In some embodiments of the present invention, in some embodiments,

The outlet of the first pressure regulating component is connected with the atmosphere, and a first electromagnetic valve is arranged at the outlet of the first pressure regulating component; and/or

The outlet of the third pressure regulating component is connected with the atmosphere, and a second electromagnetic valve is arranged at the outlet of the third pressure regulating component.

In some embodiments, the second gas mixture line further comprises:

And the inlet of the fifth pressure regulating assembly is connected to a position before the second mixed gas outlet, and the outlet of the fifth pressure regulating assembly is connected with the atmosphere.

In some embodiments, the fifth pressure regulating assembly comprises:

And the inlet of the fifth electronic flow controller is connected to a position in front of the second mixed gas outlet, and the outlet of the fifth electronic flow controller is connected with the atmosphere.

In some embodiments, a third solenoid valve is provided at the outlet of the fifth pressure regulating assembly.

In some embodiments, the gas dynamic dilution apparatus further comprises:

A first mixing chamber comprising a first mixing chamber, a second mixing chamber in close proximity to the first mixing chamber, and a first passageway communicating the first mixing chamber with the second mixing chamber, the first outlet and the second outlet being connected to the first mixing chamber, the first mixture outlet being connected to the second mixing chamber; and/or

A second mixing chamber comprising a third mixing chamber, a fourth mixing chamber immediately adjacent to the third mixing chamber, and a second channel communicating the third mixing chamber and the fourth mixing chamber, the first and third outlets being connected to the third mixing chamber, the second mixture outlet being connected to the fourth mixing chamber; and/or

The gas dynamic diluting device further comprises:

The shell, the raw material gas pipeline with first dilution gas pipeline sets up in the shell just the raw material gas pipeline with first dilution gas pipeline communicates each other, be provided with a plurality of takeoffs on the shell, a plurality of takeoffs are along gas flow direction interval arrangement, one of takeoffs is first entry, another of takeoffs is the second entry, first entry compare the second entry is closer to the rear end of gas flow direction.

Compared with the prior art, the embodiment of the utility model has the beneficial effects that: the method comprises the steps of firstly mixing raw material gas with diluent gas in a first diluent gas pipeline for the first time, mixing the first-stage mixed gas formed after the first time with diluent gas in a second diluent gas pipeline for the second time, outputting second-stage mixed gas formed after the second time mixing from a second mixed gas outlet of the second mixed gas pipeline, and taking the second-stage mixed gas as gas subjected to final dilution. Compared with the gas dynamic diluting device in the prior art, the gas dynamic diluting device provided by the embodiment can be used for further diluting the raw gas by connecting an additional diluting gas pipeline in parallel on the basis of the existing structure in the prior art, and the purpose of large-scale dilution is realized. The air resistance with smaller aperture is not needed, the dilution gas with larger quantity is also not needed, and the large-scale dilution is realized by using reasonable cost.

Drawings

Fig. 1 is a schematic diagram of one of the dynamic gas diluting apparatuses in the prior art.

Fig. 2 is a schematic diagram of a dynamic gas diluting device according to an embodiment of the present utility model.

Fig. 3 is a schematic view of a housing according to an embodiment of the present utility model.

In the figure: 100. a feed gas line; 110. a first air lock; 120. a first pressure regulating assembly; 130. a first electromagnetic valve; 140. fifth air resistance; 101. a first branch; 200. a first dilution gas line; 210. a second air resistance; 220. a second pressure regulating assembly; 230. sixth air resistance; 300. a first gas mixture line; 310. a third air resistance; 320. a third pressure regulating assembly; 330. a second electromagnetic valve; 301. a second branch; 400. a second dilution gas line; 410. fourth air resistance; 420. a fourth pressure regulating assembly; 430. seventh air resistance; 500. a second gas mixture line; 510. a fifth pressure regulating assembly; 520. a third electromagnetic valve; 501. a third branch; 600. a housing; 610-670, interface.

Detailed Description

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present utility model are shown.

In the present utility model, directional terms such as "upper", "lower", "left", "right", "inner" and "outer" are used for convenience of understanding, and thus do not limit the scope of the present utility model unless otherwise specified.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

First, in the present embodiment, the following terms are defined.

The air resistance is a device that abruptly reduces the gas flow cross section. When gas flows through the gas barrier, gas molecules collide with the pipe wall, friction is increased, and thus the gas molecules consume a great amount of energy, and thus the gas barrier exerts a resistance effect on the gas. As examples of the air lock, the air lock may be a capillary air lock, a metal powder sintering air lock, or the like. For a vapor lock, when the pressure difference between the front end of the vapor lock (the end where the gas enters the vapor lock is the front end) and the back end (the end where the gas exits the vapor lock is the back end) is fixed, the flow through the vapor lock is fixed. Thus, if the pressure difference between the front and rear ends of the air lock increases, the flow through the air lock increases.

The electronic flow controller is a functional module for controlling the flow of gas flowing through the electronic flow controller through PID, and generally comprises a proportional valve, a pressure sensor and a control unit, wherein the proportional valve controls the section size of a gas channel, the pressure sensor detects the pressure of the gas in the gas channel, and the control unit adjusts the opening of the proportional valve and controls the pressure of the gas according to the received pressure value of the pressure sensor.

The embodiment provides a gas dynamic dilution device, which realizes large-scale dilution of raw material gas by at least twice dilution of raw material gas, for example, the dilution ratio can reach 10000 times.

Fig. 2 shows a schematic diagram of the gas dynamic diluting device provided in this embodiment. As shown in fig. 2, the gas dynamic diluting device includes a raw material gas pipeline 100, a first dilution gas pipeline 200, a first mixed gas pipeline 300, a second dilution gas pipeline 400 and a second mixed gas pipeline 500, wherein an outlet of the raw material gas pipeline 100 and an outlet of the first dilution gas pipeline 200 are connected to an inlet of the first mixed gas pipeline 300, and an outlet of the first mixed gas pipeline 300 and an outlet of the second dilution gas pipeline 400 are connected to an inlet of the second mixed gas pipeline 500.

Thus, the raw gas is first mixed with the diluent gas in the first diluent gas pipeline 200, the first mixed gas formed after the first mixing is then mixed with the diluent gas in the second diluent gas pipeline 400 for the second time, and the second mixed gas formed after the second mixing is output from the outlet of the second mixed gas pipeline 500, and the second mixed gas is used as the gas after final dilution.

Compared with the gas dynamic diluting device in the prior art, the gas dynamic diluting device provided by the embodiment can be used for further diluting the raw gas by connecting an additional diluting gas pipeline in parallel on the basis of the existing structure in the prior art, and the purpose of large-scale dilution is realized. The air resistance with smaller aperture is not needed, the dilution gas with larger quantity is also not needed, and the large-scale dilution is realized by using reasonable cost.

Of course, in other embodiments, if the dilution ratio needs to be further improved, a third dilution gas pipeline and a third gas mixture pipeline may be provided to further dilute the second-stage gas mixture, and the connection relationship between the third dilution gas pipeline and the third gas mixture pipeline may be set with reference to this embodiment, so that specific structures will not be described again.

As shown in fig. 2, the feed gas pipeline 100 includes a first inlet for feeding the feed gas and a first outlet for discharging the feed gas, a first air resistor 110 is disposed between the first inlet and the first outlet, and the feed gas fed from the first inlet needs to flow to the first outlet after passing through the first air resistor 110, and the first air resistor 110 is used for controlling the flow of the feed gas.

As shown in fig. 2, further, a first pressure adjusting component 120 may be disposed at the front end of the first air resistor 110 to adjust the pressure at the front end of the first air resistor 110, thereby controlling the pressure difference between the front end and the rear end of the first air resistor 110 and adjusting the flow rate of the raw material air passing through the first air resistor 110. For example, when the first pressure regulating assembly 120 increases the pressure at the front end of the first air lock 110, the flow of raw material air through the first air lock 110 increases; when the first pressure regulating assembly 120 reduces the pressure at the front end of the first air lock 110, the flow of feed gas through the first air lock 110 decreases.

In this embodiment, the first pressure adjusting component 120 is a first electronic flow controller, as shown in fig. 2, where an inlet of the first electronic flow controller is connected to a front end of the first air resistor 110 through the first branch 101, and an outlet of the first electronic flow controller is in communication with the atmosphere, so that a total amount of raw material gas entering the first inlet is equal to a sum of a total amount of raw material gas in the first branch 101 and a total amount of raw material gas passing through the first air resistor 110, and the pressure of the front end of the first air resistor 110 is reduced by discharging the raw material gas in the first branch 101 to the atmosphere.

In addition, in order to avoid the problem that the first electronic flow controller fails, so that the raw material gas leaks from the first electronic flow controller when the gas dynamic diluting device is stopped, in this embodiment, the first electromagnetic valve 130 is disposed at the outlet of the first electronic flow controller, and when the gas dynamic diluting device is stopped, the first electromagnetic valve 130 is automatically closed, so as to ensure that the raw material gas cannot leak from the outlet of the electronic flow controller.

In addition, a fifth air lock 140 is further disposed at the front end of the first air lock 110, where the first branch 101 is located at the rear end of the fifth air lock 140, the first inlet is located at the front end of the first air lock 110, and the purpose of the fifth air lock 140 is to further control the pressure of the front end of the first air lock 110, because if the pressure of the front end of the first air lock 110 is controlled by abutting against the first pressure adjusting component 120, the maximum pressure of the front end of the first air lock 110 is the pressure of the raw material gas at the first inlet, and the minimum pressure of the front end of the first air lock 110 is the pressure of the first pressure adjusting component 120 for discharging all the raw material gas, so when the front end of the first air lock 110 needs a smaller pressure, a large amount of raw material gas will be discharged from the first branch 101, and the consumption of the raw material gas is increased. After the fifth air resistor 140 is provided, the front end of the first air resistor 110 can be limited, and even if the front end of the first air resistor 110 needs smaller pressure, a large amount of raw material gas is not discharged outwards from the first branch pipe.

The resistance of the fifth air lock 140 to the air flow may be selected in a number of ways. For example, when the pressure change requirement at the front end of the first air resistor 110 is small and at a relatively low pressure, the resistance of the fifth air resistor 140 to the air flow may be smaller than the resistance of the first air resistor 110 to the air flow, and the raw gas discharged from the first branch 101 may be reduced. When the pressure change requirement of the front end of the first air resistor 110 is smaller and is at a relatively high pressure, the resistance of the fifth air resistor 140 to the air flow may be greater than the resistance of the first air resistor 110 to the air flow, so as to provide sufficient pressure to the front end of the first air resistor 110. When the pressure change requirement of the front end of the first air resistor 110 is greater, the resistance of the fifth air resistor 140 to the air flow needs to be greater than the resistance of the first air resistor 110 to the air flow, so that the front end of the first air resistor 110 can have a larger pressure adjustment range.

As shown in fig. 2, the first dilution gas pipeline 200 includes a second inlet for the dilution gas and a second outlet for the dilution gas to be discharged, and a second air resistor 210 is disposed between the second inlet and the second outlet, so that the dilution gas entering from the second inlet needs to flow to the second outlet after passing through the second air resistor 210, and the second air resistor 210 is used for controlling the flow of the dilution gas.

As shown in fig. 2, further, a second pressure adjusting component 220 may be disposed at the front end of the second air resistor 210 to adjust the pressure at the front end of the second air resistor 210, thereby controlling the pressure difference between the front end and the rear end of the second air resistor 210 and adjusting the flow rate of the dilution air passing through the second air resistor 210. For example, when the second pressure regulating assembly 220 increases the pressure at the front end of the second air lock 210, the flow of dilution air through the second air lock 210 increases; when the second pressure regulating assembly 220 reduces the pressure at the front end of the second air lock 210, the flow of dilution air through the second air lock 210 decreases.

In this embodiment, the second pressure adjusting component 220 is a second electronic flow controller, an inlet of the second electronic flow controller is connected to the second inlet, and an outlet of the second electronic flow controller is connected to the front end of the second air resistor 210, so as to control the pressure of the dilution air passing through the second electronic flow controller by controlling the opening of the proportional valve in the second electronic flow controller, thereby controlling the pressure of the front end of the second air resistor 210.

In addition, a sixth air resistor 230 is further disposed at the front end of the second pressure adjusting assembly 220, and the purpose of the sixth air resistor 230 is to further control the pressure of the front end of the second air resistor 210, and the specific principle is the same as that of the fifth air resistor 140, which is not described herein. In addition, the resistance of the sixth air resistor 230 to the air flow may be selected in various ways, and reference may be made to the fifth air resistor 140, which will not be described herein.

As shown in fig. 2, the first gas mixture pipeline 300 includes a first gas mixture inlet and a first gas mixture outlet, the first gas mixture inlet is connected with the first outlet and the second outlet, so that the raw material gas and the diluent gas can enter the first gas mixture pipeline 300, a third gas barrier 310 is disposed between the first gas mixture inlet and the first gas mixture outlet, and then the first-stage gas mixture can flow to the first gas mixture outlet after passing through the second gas barrier 210, and the third gas barrier 310 is used for controlling the flow of the first-stage gas mixture.

The primary mixed gas is obtained by mixing a raw material gas and a diluent gas. The raw material gas and the diluent gas may be mixed and then enter the first mixed gas line 300, or the raw material gas and the diluent gas may be mixed and then enter the first mixed gas line 300.

As shown in fig. 2, the front end of the third air resistor 310 is connected to a third pressure adjusting component 320 through the second branch 301 to adjust the pressure at the front end of the third air resistor 310, thereby controlling the pressure difference between the front end and the rear end of the third air resistor 310 and adjusting the first-stage mixed gas flow passing through the third air resistor 310. For example, when the third pressure regulating assembly 320 increases the pressure at the front end of the third air lock 310, the amount of primary mixed gas flow through the third air lock 310 increases; when the third pressure regulating assembly 320 reduces the pressure at the front end of the third air lock 310, the amount of primary mixed gas flow through the third air lock 310 decreases.

In this embodiment, the third pressure adjusting component 320 is a third electronic flow controller, as shown in fig. 2, an inlet of the third electronic flow controller is connected to the front end of the third air resistor 310 through the second branch 301, and an outlet of the third electronic flow controller is connected to the atmosphere, so that the total amount of the first-stage mixed gas entering the first mixed gas inlet is equal to the sum of the total amount of the first-stage mixed gas in the second branch 301 and the total amount of the first-stage mixed gas passing through the third air resistor 310, and the pressure of the front end of the third air resistor 310 is reduced by discharging the first-stage mixed gas in the second branch 301 to the atmosphere.

In addition, in order to avoid the problem that the first-stage mixed gas or the diluent gas leaks from the third electronic flow controller when the gas dynamic diluting device is stopped due to the failure of the third electronic flow controller, in this embodiment, the second electromagnetic valve 330 is disposed at the outlet of the third electronic flow controller, and when the gas dynamic diluting device is stopped, the second electromagnetic valve 330 is automatically closed to ensure that the first-stage mixed gas or the diluent gas cannot leak from the outlet of the third electronic flow controller.

As shown in fig. 2, the second diluent gas pipeline 400 includes a third inlet for the diluent gas and a third outlet for the diluent gas to be discharged, a fourth air resistor 410 is disposed between the third inlet and the third outlet, and the diluent gas entering from the third inlet needs to flow to the third outlet after passing through the fourth air resistor 410, and the fourth air resistor 410 is used for controlling the flow of the diluent gas.

As shown in fig. 2, a fourth pressure adjusting component 420 may be further disposed at the front end of the fourth air resistor 410 to adjust the pressure at the front end of the fourth air resistor 410, thereby controlling the pressure difference between the front end and the rear end of the fourth air resistor 410 and adjusting the flow of dilution air passing through the fourth air resistor 410. For example, as the fourth pressure regulating assembly 420 increases the pressure at the front end of the fourth air lock 410, the flow of dilution air through the fourth air lock 410 increases; when the fourth pressure regulating assembly 420 reduces the pressure at the front end of the fourth air lock 410, the flow of dilution air through the fourth air lock 410 decreases.

In this embodiment, the fourth pressure adjusting component 420 is a fourth electronic flow controller, an inlet of the fourth electronic flow controller is connected to the third inlet, and an outlet of the fourth electronic flow controller is connected to the front end of the fourth air resistor 410, so as to control the pressure of the dilution air passing through the fourth electronic flow controller by controlling the opening of the proportional valve in the fourth electronic flow controller, thereby controlling the pressure of the front end of the fourth air resistor 410.

In addition, a seventh air lock 430 is further disposed at the front end of the fourth pressure adjusting assembly 420, and the purpose of the seventh air lock 430 is to further control the pressure at the front end of the fourth air lock 410, and the specific principle is the same as that of the fifth air lock 140, which is not described herein. In addition, the resistance of the seventh air resistor 430 to the air flow may be selected in various ways, and reference may be made to the fifth air resistor 140, which will not be described herein.

As shown in fig. 2, the second mixed gas pipeline 500 includes a second mixed gas inlet and a second mixed gas outlet, and the second mixed gas inlet is connected with the first mixed gas outlet and the third outlet, so that the first mixed gas and the diluent gas can enter the second mixed gas pipeline 500.

The primary mixed gas and the diluent gas are mixed to obtain a secondary mixed gas. In addition, the first-stage mixed gas and the diluent gas may be mixed and then enter the second mixed gas pipeline 500, or the first-stage mixed gas and the diluent gas may be mixed and then enter the second mixed gas pipeline 500.

As shown in fig. 2, the second mixed gas pipeline 500 is connected with a fifth pressure regulating assembly 510 through a third branch 501 to regulate the pressure of the second mixed gas outlet.

In this embodiment, the fifth pressure adjusting component 510 is a fifth electronic flow controller, as shown in fig. 2, where an inlet of the fifth electronic flow controller is connected to the second gas mixture pipeline 500 through the third branch 501, and an outlet of the fifth electronic flow controller is connected to the atmosphere, so that a total amount of the second mixed gas entering the second gas mixture inlet is equal to a sum of a total amount of the second mixed gas in the third branch 501 and a total amount of the second mixed gas passing through the second mixed gas outlet, and the pressure of the second mixed gas outlet is reduced by discharging the second mixed gas in the third branch 501 to the atmosphere.

In addition, in order to avoid the problem that the fifth electronic flow controller is failed, so that the secondary mixed gas or the diluent gas leaks from the fifth electronic flow controller when the gas dynamic dilution device is stopped, in this embodiment, a third electromagnetic valve 520 is disposed at the outlet of the fifth electronic flow controller, and when the gas dynamic dilution device is stopped, the third electromagnetic valve 520 is automatically closed, so as to ensure that the secondary mixed gas or the diluent gas cannot leak from the outlet of the fifth electronic flow controller.

In order to increase the mixing effect of the raw material gas and the diluent gas, a first mixing cavity can be arranged at the front end of the first mixing gas inlet, the first mixing cavity comprises a first mixing chamber, a second mixing chamber adjacent to the first mixing chamber and a first channel for communicating the first mixing chamber with the second mixing chamber, a first outlet and a second outlet are connected to the first mixing chamber, and the first mixing gas outlet is connected to the second mixing chamber, so that the raw material gas and the diluent gas are mixed in the first mixing chamber and then enter the second mixing chamber, and as the first mixing chamber and the second mixing chamber are adjacent to each other, the flowing distance of the raw material gas and the diluent gas is shortened, and the adsorption of the raw material gas by the first mixing cavity is reduced.

Similarly, in order to increase the mixing effect of the mixed gas and the diluted gas, a second mixing chamber may be disposed at the front end of the second mixed gas inlet, the second mixing chamber includes a third mixing chamber, a fourth mixing chamber adjacent to the third mixing chamber, and a second channel communicating the third mixing chamber with the fourth mixing chamber, the first mixed gas outlet and the third outlet are connected to the third mixing chamber, and the second mixed gas outlet is connected to the fourth mixing chamber, so that the first mixed gas and the diluted gas are mixed in the third mixing chamber and then enter the fourth mixing chamber, and since the third mixing chamber and the fourth mixing chamber are adjacent to each other, the flowing distance of the first mixed gas and the diluted gas is shortened, and adsorption of the first mixed chamber to the raw material gas in the first mixed gas is reduced.

In addition, as shown in fig. 3, the feed gas line 100 and the first dilution gas line 200 may be disposed together in one housing 600, and the feed gas line 100 and the first dilution gas line 200 are communicated with each other, and the housing 600 is provided with a plurality of ports 610 to 670 arranged at intervals along the gas flow direction, one of the ports 610 to 670 may be a first inlet, and the other port may be a second inlet, and the first inlet may be closer to the rear end of the gas flow direction than the second inlet along the gas flow direction, that is, the dilution gas may push the feed gas to flow forward, so that the feed gas in front may be mixed with the dilution gas. Specifically, the interface 610 may be used as a second inlet for the dilution gas. Interface 620 may serve as a first inlet for the feed gas.

It should be noted that, the flow through the air resistor not only depends on the size and the inlet pressure of the air resistor, but also depends on the ambient temperature, the ambient temperature can influence the air resistor resistance, if the ambient temperature is inconsistent during calibration and use, flow deviation can occur, so the air resistor is heated during use, the heating temperature is higher than the room temperature, the temperature consistency during calibration and use is ensured, and the flow of the air resistor is not influenced by external temperature change.

The gas dynamic diluting device provided by the embodiment can be combined with a concentrator to increase the detectable concentration range of an analysis system. When the concentration of the sample is very low, adopting a mode of undiluted and large-volume concentration; when the concentration of the sample is high, the concentration range of the analyte is increased by adopting a mode of large-scale dilution, small-volume concentration or non-concentration.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art. The generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A gas dynamic diluting device, comprising:

A feed gas line (100), the feed gas line (100) having a first inlet and a first outlet, the first inlet inputting feed gas;

A first dilution gas line (200), the first dilution gas line (200) having a second inlet and a second outlet, the second inlet inputting a dilution gas;

The first mixed gas pipeline (300) is provided with a first mixed gas inlet and a first mixed gas outlet, the first outlet and the second outlet are connected with the first mixed gas outlet, and the first mixed gas outlet outputs primary mixed gas formed by mixing raw material gas and diluent gas;

a second dilution gas line (400), the second dilution gas line (400) having a third inlet and a third outlet, the third inlet inputting a dilution gas; and

The second mixed gas pipeline (500), the second mixed gas pipeline (500) is provided with a second mixed gas inlet and a second mixed gas outlet, the first mixed gas outlet and the third outlet are connected with the second mixed gas inlet, and the second mixed gas outlet outputs a second mixed gas formed after mixing the first mixed gas and the diluent gas.

2. A gas dynamic diluting apparatus according to claim 1, wherein,

The feed gas line (100) further comprises: a first air resistor (110), the first air resistor (110) being disposed between the first inlet and the first outlet; and/or

The first dilution gas line (200) further comprises: a second air lock (210), the second air lock (210) being disposed between the second inlet and the second outlet; and/or

The first gas mixture line (300) further includes: a third air lock (310), the third air lock (310) being disposed between the first mixed gas inlet and the first mixed gas outlet; and/or

The second dilution gas line (400) further comprises: a fourth air lock (410), the fourth air lock (410) being disposed between the third inlet and the third outlet.

3. A gas dynamic diluting apparatus according to claim 2, wherein,

The feed gas line (100) further comprises: a first pressure regulating assembly (120), the first pressure regulating assembly (120) being disposed at a front end of the first air resistor (110); and/or

The first dilution gas line (200) further comprises: a second pressure regulating assembly (220), the second pressure regulating assembly (220) being disposed at a front end of the second air resistor (210); and/or

The first gas mixture line (300) further includes: a third pressure regulating assembly (320), the third pressure regulating assembly (320) being disposed at a front end of the third air resistor (310); and/or

The second dilution gas line (400) further comprises: and a fourth pressure adjusting assembly (420), wherein the fourth pressure adjusting assembly (420) is arranged at the front end of the fourth air resistor (410).

4. A gas dynamic diluting apparatus according to claim 3, wherein,

The first pressure regulating assembly (120) includes: the inlet of the first electronic flow controller is connected with the front end of the first gas resistor (110), and the first electronic flow controller discharges raw gas at the front end of the first gas resistor (110) so as to adjust the pressure at the front end of the first gas resistor (110); and/or

The second pressure regulating assembly (220) comprises: the inlet of the second electronic flow controller is connected with the second inlet, and the outlet of the second electronic flow controller is connected with the front end of the second air resistor (210); and/or

The third pressure regulating assembly (320) includes: the inlet of the third electronic flow controller is connected with the front end of the third air resistor (310), and the third electronic flow controller discharges the mixed gas at the front end of the third air resistor (310) so as to adjust the pressure at the front end of the third air resistor (310); and/or

The fourth pressure regulating assembly (420) includes: and the inlet of the fourth electronic flow controller is connected with the third inlet, and the outlet of the fourth electronic flow controller is connected with the front end of the fourth air resistor (410).

5. A gas dynamic diluting apparatus according to claim 3, wherein,

The feed gas line (100) further comprises: a fifth air lock (140), the first inlet being located at a front end of the fifth air lock (140), a rear end of the fifth air lock (140) being located at a front end of the inlet of the first pressure regulating assembly (120); and/or

The first dilution gas line (200) further comprises: a sixth air resistor (230), wherein the second inlet is positioned at the front end of the sixth air resistor (230), and the rear end of the sixth air resistor (230) is positioned at the front end of the inlet of the second pressure regulating assembly (220); and/or

The second dilution gas line (400) further comprises: and a seventh air resistor (430), wherein the third inlet is positioned at the front end of the seventh air resistor (430), and the rear end of the seventh air resistor (430) is positioned at the front end of the inlet of the fourth pressure regulating assembly (420).

6. A gas dynamic diluting apparatus according to claim 3 or 4, wherein,

The outlet of the first pressure regulating component (120) is connected with the atmosphere, and a first electromagnetic valve (130) is arranged at the outlet of the first pressure regulating component (120); and/or

The outlet of the third pressure regulating component (320) is connected with the atmosphere, and a second electromagnetic valve (330) is arranged at the outlet of the third pressure regulating component (320).

7. The gas dynamic dilution apparatus according to claim 1, wherein the second mixed gas pipeline (500) further comprises:

And a fifth pressure regulating assembly (510), wherein an inlet of the fifth pressure regulating assembly (510) is connected to a position before the second mixed gas outlet, and an outlet of the fifth pressure regulating assembly (510) is connected with the atmosphere.

8. The gas dynamic dilution apparatus according to claim 7, wherein the fifth pressure adjustment assembly (510) comprises:

And the inlet of the fifth electronic flow controller is connected to a position in front of the second mixed gas outlet, and the outlet of the fifth electronic flow controller is connected with the atmosphere.

9. The gas dynamic dilution apparatus according to claim 8, wherein a third solenoid valve (520) is provided at an outlet of the fifth pressure regulating assembly (510).

10. The gas dynamic dilution apparatus according to claim 1, further comprising:

A first mixing chamber comprising a first mixing chamber, a second mixing chamber in close proximity to the first mixing chamber, and a first passageway communicating the first mixing chamber with the second mixing chamber, the first outlet and the second outlet being connected to the first mixing chamber, the first mixture outlet being connected to the second mixing chamber; and/or

A second mixing chamber comprising a third mixing chamber, a fourth mixing chamber immediately adjacent to the third mixing chamber, and a second channel communicating the third mixing chamber and the fourth mixing chamber, the first and third outlets being connected to the third mixing chamber, the second mixture outlet being connected to the fourth mixing chamber; and/or

The gas dynamic diluting device further comprises:

The shell (600), feed gas pipeline (100) with first dilution gas pipeline (200) set up in shell (600) just feed gas pipeline (100) with first dilution gas pipeline (200) intercommunication each other, be provided with a plurality of takeoffs on shell (600), a plurality of takeoffs are along gas flow direction interval arrangement, one of takeoffs is first entry, another of takeoffs is the second entry, first entry is relatively close to the rear end of gas flow direction in the second entry.