Efficient negative pressure gas mixing device

Abstract

The utility model discloses a high-efficiency negative-pressure gas mixing device, and aims to provide a high-efficiency negative-pressure gas mixing device which is easy to control the pressure of a gas inlet end and a gas outlet end, can overcome the defects that a Venturi gas mixing source is single and the range of inlet pressure and outlet pressure is narrow, and increases the application range of the Venturi gas mixing device. And the safety and the stability of the gas mixing device are greatly improved. The device comprises a high-pressure air conveying module, a sample gas conveying module and a Venturi gas mixing chamber, the high-pressure air conveying module comprises a pressure reducing valve, a pressure stabilizing valve and a first quality controller which are sequentially connected, the first quality controller is connected with a gas inlet of the Venturi gas mixing chamber, and the sample gas conveying module comprises a plurality of conveying units which are connected in parallel. Each conveying unit comprises an electromagnetic valve and a second quality controller which are sequentially connected, and the multiple second quality controllers are all connected with an air inlet of the Venturi air mixing chamber. The gas mixing device is applied to the technical field of gas mixing devices.

Description

Technical Field

[0001] The utility model relates to a gas mixing device, in particular to a high-efficiency negative pressure gas mixing device. Background Art

[0002] With the widespread application of gas mixing in the environmental protection industry, various gas mixing forms have appeared on the market, such as flow-following gas mixing devices, high-pressure proportional gas mixing devices, and Venturi gas mixing devices. Among them, the flow-following gas mixing device has high investment and operating costs, the high-pressure proportional gas mixing device has strict requirements on the inlet pressure of the two gas sources, and the pressure of the inlet and outlet of the Venturi gas mixing device is difficult to adjust or control, which brings inconvenience to the connection after the Venturi gas mixing device. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a high-efficiency negative pressure mixing device which is easy to control the pressures at the air inlet and air outlet ends, which can solve the drawbacks of the Venturi mixing gas source being single and the inlet pressure and outlet pressure ranges being narrow, thereby increasing the application scope of the Venturi mixing device and greatly improving the safety and stability of the mixing device.

[0004] The technical solution adopted by the utility model is: the utility model includes a high-pressure air delivery module, a sample gas delivery module and a venturi mixing chamber, the high-pressure air delivery module includes a pressure reducing valve, a pressure stabilizing valve and a first mass controller connected in sequence, the first mass controller is connected to the air inlet of the venturi mixing chamber, the sample gas delivery module includes a plurality of delivery units connected in parallel, each of the delivery units includes an electromagnetic valve and a second mass controller connected in sequence, and a plurality of the second mass controllers are all connected to the air inlet of the venturi mixing chamber.

[0005] Furthermore, the high-efficiency negative pressure gas mixing device also includes a device housing, and the high-pressure air delivery module and the sample gas delivery module are both arranged on the device housing.

[0006] Furthermore, the high-efficiency negative pressure gas mixing device also includes a high-pressure air storage tank and a sample gas storage tank, the pressure reducing valve is connected to the high-pressure air storage tank, and the plurality of solenoid valves are connected to the sample gas storage tank.

[0007] Furthermore, the number of the conveying units is three.

[0008] The beneficial effects of the utility model are:

[0009] With respect to the deficiencies of the prior art, in the present invention, since a negative pressure can be generated when high-pressure air is passed into the high-efficiency negative pressure mixing device, the vortex of the high-pressure air can quickly mix the sample gas with the clean gas; moreover, the quantitative amount of the mixed sample gas is accurately controlled by the first mass controller and the second mass controller, thereby making it easy to control the pressures at the air inlet and air outlet ends of the Venturi mixing chamber, which can solve the drawbacks of the Venturi mixing gas having a single air source and a narrow range of inlet and outlet pressures, thereby increasing the application scope of the Venturi-type mixing device, greatly improving the safety and stability of the mixing device, and making the present invention have the advantage of being easy to control the pressures at the air inlet and air outlet ends. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0011] Figure 1 It is a schematic diagram of the connection relationship of the utility model;

[0012] Figure 2 This is a schematic diagram of the plane structure of the utility model Figure 1 ;

[0013] Figure 3 This is a schematic diagram of the plane structure of the utility model Figure 2 .

[0014] The reference numerals are as follows:

[0015] 1. High-pressure air delivery module; 2. Sample gas delivery module; 3. Venturi mixing chamber; 4. Delivery unit; 5. Pressure reducing valve; 6. Pressure stabilizing valve; 7. First mass controller; 8. Solenoid valve; 9. Second mass controller; 10. Device housing; 11. High-pressure air storage tank; 12. Sample gas storage tank.

[0016] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, clockwise, counterclockwise, etc., are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0019] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0020] like Figure 1 to Figure 2 As shown, in this embodiment, the utility model includes a high-pressure air delivery module 1, a sample gas delivery module 2 and a Venturi mixing chamber 3, the high-pressure air delivery module 1 includes a pressure reducing valve 5, a pressure stabilizing valve 6 and a first mass controller 7 connected in sequence, the first mass controller 7 is connected to the air inlet of the Venturi mixing chamber 3, the sample gas delivery module 2 includes a plurality of delivery units 4 in parallel, each of the delivery units 4 includes a solenoid valve 8 and a second mass controller 9 connected in sequence, and a plurality of the second mass controllers 9 are connected to the air inlet of the Venturi mixing chamber 3.

[0021] It should be noted that after the high-pressure air passes through the pressure reducing valve 5 and the pressure stabilizing valve 6, the quantitative clean air is controlled by the first mass controller 7 to enter the Venturi mixing chamber 3; the sample gas is controlled by multiple solenoid valves 8 to control the gas path, and then passes through the second mass controller 9, and the gas volume is controlled according to the proportional demand to enter the Venturi mixing chamber 3, so as to be fully mixed with the clean air.

[0022] With respect to the deficiencies of the prior art, in the present invention, since a negative pressure can be generated when high-pressure air is passed into the high-efficiency negative pressure mixing device, the vortex of the high-pressure air can quickly mix the sample gas with the clean gas; moreover, the quantitative amount of the mixed sample gas is accurately controlled by the first mass controller 7 and the second mass controller 9, so that it is easy to control the pressures at the air inlet and outlet ends of the Venturi mixing chamber 3, which can solve the disadvantages of the single Venturi mixing gas source and the narrow inlet pressure and outlet pressure ranges, increase the application range of the Venturi mixing device, greatly improve the safety and stability of the mixing device, and make the present invention have the advantage of easy control of the pressures at the air inlet and outlet ends.

[0023] In certain embodiments, the high-efficiency negative pressure gas mixing device further includes a device housing 10 , and the high-pressure air delivery module 1 and the sample gas delivery module 2 are both disposed on the device housing 10 .

[0024] In some embodiments, the high-efficiency negative pressure gas mixing device further comprises a high-pressure air storage tank 11 and a sample gas storage tank 12, the pressure reducing valve 5 is connected to the high-pressure air storage tank 11, and the plurality of solenoid valves 8 are connected to the sample gas storage tank 12. Specifically, high-pressure air is supplied to the pressure reducing valve 5 through the high-pressure air storage tank 11; and sample gas is supplied to the plurality of solenoid valves 8 through the sample gas storage tank 12.

[0025] In some embodiments, the number of the conveying units 4 is three.

[0026] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A high-efficiency negative pressure gas mixing device, characterized in that: The invention comprises a high-pressure air delivery module (1), a sample gas delivery module (2) and a venturi mixing chamber (3); the high-pressure air delivery module (1) comprises a pressure reducing valve (5), a pressure stabilizing valve (6) and a first mass controller (7) which are connected in sequence; the first mass controller (7) is connected to the air inlet of the venturi mixing chamber (3); the sample gas delivery module (2) comprises a plurality of delivery units (4) connected in parallel; each of the delivery units (4) comprises a solenoid valve (8) and a second mass controller (9) which are connected in sequence; and the plurality of second mass controllers (9) are all connected to the air inlet of the venturi mixing chamber (3).

2. A high-efficiency negative pressure gas mixing device according to claim 1, characterized in that: The high-efficiency negative pressure gas mixing device further comprises a device housing (10), and the high-pressure air delivery module (1) and the sample gas delivery module (2) are both arranged on the device housing (10).

3. A high-efficiency negative pressure gas mixing device according to claim 2, characterized in that: The high-efficiency negative pressure gas mixing device further comprises a high-pressure air storage tank (11) and a sample gas storage tank (12), the pressure reducing valve (5) is connected to the high-pressure air storage tank (11), and the plurality of solenoid valves (8) are all connected to the sample gas storage tank (12).

4. A high-efficiency negative pressure gas mixing device according to any one of claims 1 to 3, characterized in that: The number of the conveying units (4) is three.

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