Gas mixing device

Abstract

The gas mixing device comprises a gas inlet pipe, a gas mixing pipe body and a gas outlet pipe which are sequentially connected and communicated, the gas mixing pipe body comprises a first gas mixing pipe section, a second gas mixing pipe section and a third gas mixing pipe section which are sequentially communicated, and a first spiral piece used for guiding gas is arranged on the inner wall of the first gas mixing pipe section; a circulation baffle is arranged in the second gas mixing pipe section, a second spiral piece used for guiding gas is arranged on the inner wall of the third gas mixing pipe section, and the gas outlet pipe is movably connected with the third gas mixing pipe section in the axial direction so as to adjust the gas mixing length of the third gas mixing pipe section. The gas mixing device comprises a gas mixing pipe body, a gas inlet pipe and a gas outlet pipe, the gas inlet pipe generates first-stage mixing of gas, the gas mixing pipe body forms three-stage mixing of mixed gas through a first spiral piece, a circulation baffle and a second spiral piece which are sequentially arranged, and the gas is kept to be fully mixed.

Description

Technical Field

[0001] The utility model relates to the technical field of gas mixing equipment, in particular to a gas mixing device. Background Art

[0002] The pipeline type gas mixer is a device specifically designed to mix gases inside a pipeline, and is commonly used in application scenarios where two or more gases need to be quickly and evenly mixed in a specific proportion, such as in the chemical industry, semiconductor manufacturing, medical gas supply systems, laboratories, and combustion control systems. When mixing gases in a pipeline, if different gases are directly introduced into the pipeline and gas mixing is achieved through the fluid of the gas inside the smooth pipeline, it is very likely that the gases will be unevenly mixed in the pipeline; when a spiral sheet or a perforated plate is separately arranged inside the pipeline for gas mixing, the form of gas disturbance by the spiral sheet or the perforated plate is single, and the mixing effect is also not good. Content of the Utility Model

[0003] Aiming at the situation that the gas mixing effect of the pipeline type gas mixing structure with a separately arranged spiral sheet or a perforated plate is not ideal in the prior art, the utility model provides a gas mixing device, which perturbs and mixes the gas through the combination of a spiral sheet and a perforated plate to enhance the mixing effect.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A gas mixing device includes a mixing pipe body, an inlet pipe and an outlet pipe. The inlet pipe, the mixing pipe body and the outlet pipe are sequentially connected and communicated. The mixing pipe body includes a first mixing pipe section, a second mixing pipe section and a third mixing pipe section that are sequentially communicated. The inner diameter of the second mixing pipe section is larger than that of the first mixing pipe section and the third mixing pipe section.

[0006] The inner wall of the first mixing pipe section is provided with a first spiral sheet for guiding gas, and the inlet end of the first mixing pipe section is fixedly connected and communicated with the inlet pipe.

[0007] A flow baffle is arranged inside the second mixing pipe section, and the flow baffle is provided with a plurality of flow holes penetrating through the flow baffle.

[0008] The inner wall of the third mixing pipe section is provided with a second spiral sheet for guiding gas. The outlet pipe is axially movably connected to the third mixing pipe section to adjust the gas mixing length of the third mixing pipe section. The inlet end of the outlet pipe is fixedly provided with a second threaded seat. The second threaded seat is provided with an exhaust hole for communicating the third mixing pipe section and the outlet pipe. The outside of the second threaded seat is provided with a thread groove matching with the second spiral sheet to form a threaded connection between the second threaded seat and the third mixing pipe section.

[0009] Preferably, a main intake duct is provided at the intake end of the intake pipe, a first threaded seat fixedly connected to the first mixing pipe section by threads is provided at the outlet end of the intake pipe, a plurality of sub-intake ducts are provided between the first threaded seat and the main intake duct, and the intake direction of the sub-intake ducts is tangent to the intake pipe.

[0010] Preferably, the gas swirling direction generated inside the intake pipe when the sub-intake ducts intake gas is the same as the gas swirling direction generated when the first spiral vane guides the gas.

[0011] Preferably, the gas swirling direction generated when the first spiral vane guides the gas is the same as the gas swirling direction generated when the second spiral vane guides the gas.

[0012] Preferably, the first end of the outlet pipe is located outside the mixing pipe body, an outlet duct is provided at the first end of the outlet pipe, the second end of the outlet pipe is located inside the mixing pipe body, and a second threaded seat is fixedly provided at the second end of the outlet pipe.

[0013] Preferably, the sum of the radial areas of all the flow holes on the flow baffle is equal to the radial flow area of the first mixing pipe section or the radial flow area of the third mixing pipe section.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. This gas mixing device is used for dynamic gas mixing during the pipeline flow of two or more gases. The gas mixing device includes a mixing pipe body, an intake pipe, and an outlet pipe. The intake pipe generates a first gas swirl to achieve the first-stage mixing of the gases. The mixing pipe body forms three-stage mixing of the mixed gas through the sequentially arranged first spiral vane, flow baffle, and second spiral vane, keeping the gases fully mixed.

[0016] 2. The directions of the first gas swirl, second gas swirl, and first gas swirl inside this gas mixing device are the same, and the flow baffle does not reduce the gas flow area of the mixing pipe body, keeping the air flow inside the gas mixing device smooth and forming a stable output of the mixed gas.

[0017] 3. The second threaded seat on the outlet pipe of this gas mixing device is threadedly connected to the second spiral vane of the third mixing pipe section, forming an axial movement of the outlet pipe relative to the mixing pipe body. The gas mixing transmission of the third mixing pipe section is adjustable, and the applicability is good. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the outside of this gas mixing device;

[0019] Figure 2 is a schematic structural diagram of the axial section of this gas mixing device;

[0020] Figure 3 is a schematic structural diagram of the radial section of the intake pipe of this gas mixing device;

[0021] Figure 4 This is a schematic structural diagram of the radial cross-section of the first mixing pipe section of this gas mixing device;

[0022] Figure 5 This is a schematic structural diagram of the radial cross-section of the third mixing pipe section of this gas mixing device;

[0023] Figure 6 This is a schematic structural diagram of the second thread seat of this gas mixing device.

[0024] In the figure: 1, mixing pipe body; 2, intake pipe; 3, outlet pipe; 4, sealing cover; 11, first mixing pipe section; 12, second mixing pipe section; 13, third mixing pipe section; 14, first spiral fin; 15, flow baffle; 16, second spiral fin; 21, main intake duct; 22, sub-intake duct; 23, first thread seat; 31, outlet duct; 32, second thread seat; 33, exhaust hole; 34, thread groove; 151, flow hole. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Referring to Figure 1-2 , a gas mixing device includes a mixing pipe body 1, an intake pipe 2, and an outlet pipe 3. The intake pipe 2, the mixing pipe body 1, and the outlet pipe 3 are sequentially connected and communicated. Gas enters the mixing pipe body 1 from the intake pipe 2 and is mixed to obtain a mixed gas, and the mixed gas is discharged from the outlet pipe 3. The mixing pipe body 1 includes a first mixing pipe section 11, a second mixing pipe section 12, and a third mixing pipe section 13 that are sequentially communicated. The first mixing pipe section 11 is fixedly connected to the intake pipe 2, and the third mixing pipe section 13 is movably connected to the outlet pipe 3.

[0027] Referring to Figure 2 , a main intake duct 21 is provided at the intake end of the intake pipe 2, and a first thread seat 23 is provided at the outlet end of the intake pipe 2. The first thread seat 23 is threadedly fixed to the intake end of the first mixing pipe section 11. A sealing cover 4 is further provided at the intake end of the main intake duct 21. The main intake duct 21 is threadedly connected to the sealing cover 4, and the sealing cover 4 is used to strengthen the seal of the intake end of the main intake duct 21.

[0028] Furthermore, a plurality of sub-intake ducts 22 are provided between the first thread seat 23 and the main intake duct 21, and the sub-intake ducts 22 are connected to the side of the intake pipe 2. The main intake duct 21 and the sub-intake ducts 22 can be respectively used for the intake of different gases. Referring to Figure 3, the intake direction of the sub-intake duct 22 is tangent to the intake pipe 2. After the gas from the sub-intake duct 22 enters the intake pipe 2, a first gas swirl can be generated inside the intake pipe 2, and the direction of the first gas swirl is the W1 direction. The sub-intake duct 22 is inclined relative to the intake pipe 2, and the included angle a between the intake direction of the sub-intake duct 22 and the axis of the intake pipe 2 is not greater than 90°, which is beneficial to the gas flow in the intake pipe 2.

[0029] Reference Figure 1 and Figure 4 , the inner wall of the first mixing pipe section 11 is provided with a first spiral fin 14 for guiding gas. When the gas flows from the intake pipe 2 to the second mixing pipe section 12, the first spiral fin 14 can generate a second gas swirl inside the first mixing pipe section 11, and the direction of the second gas swirl is the W2 direction.

[0030] The inner diameter of the second mixing pipe section 12 is larger than that of the first mixing pipe section 11 and the third mixing pipe section 13. A flow baffle 15 is arranged inside the second mixing pipe section 12. The flow baffle 15 is provided with a plurality of flow holes 151 penetrating through the flow baffle 15 for gas flow. The flow baffle 15 is used to block the gas. The gas is separated when passing through the flow holes 151 and merges after passing through the flow holes 151 and enters the third mixing pipe section 13 to assist gas mixing.

[0031] In this embodiment, the radial flow area of the first mixing pipe section 11 is the same as that of the third mixing pipe section 13, and the sum of the radial areas of all the flow holes 151 on the flow baffle 15 is equal to the radial flow area of the first mixing pipe section 11 or the third mixing pipe section 13. When the gas flows from the first mixing pipe section 11 through the flow baffle 15 to the third mixing pipe section 13, the flow baffle 15 does not reduce the overall gas flow area and keeps the internal air pressure of the first mixing pipe section 11 and the third mixing pipe section 13 stable.

[0032] Reference Figure 1 and Figure 5 , the first end of the outlet pipe 3 is located outside the mixing pipe body 1. The first end of the outlet pipe 3 is provided with an outlet duct 31. The second end of the outlet pipe 3 is located inside the third mixing pipe section 13, and a second threaded seat 32 is fixedly arranged at the second end of the outlet pipe 3. The second threaded seat 32 is provided with an exhaust hole 33 for communicating the third mixing pipe section 13 and the outlet pipe 3. The second threaded seat 32 is axially movably connected with the second spiral fin 16 to adjust the mixing length of the third mixing pipe section 13.

[0033] The inner wall of the third mixing pipe section 13 is provided with a second spiral fin 16 for guiding gas. When the gas flows from the second mixing pipe section 12 to the third mixing pipe section 13, the second spiral fin 16 can generate a third gas swirl inside the third mixing pipe section 13, and the direction of the third gas swirl is the W3 direction.

[0034] In this embodiment, the W1 direction of the first gas swirl, the W2 direction of the second gas swirl, and the W3 direction of the third gas swirl are the same. For example, when looking from the first mixing pipe section 11 to the third mixing pipe section 13, the W1 direction, the W2 direction, and the W3 direction are all counterclockwise or clockwise rotations, avoiding a large amount of turbulence generated inside the mixing pipe body 1 and keeping the air flow smooth.

[0035] Reference Figure 1 and Figure 6 , an external thread groove 34 is provided on the second threaded seat 32. The thread groove 34 is matched with the second spiral fin 16 to form a threaded connection between the second threaded seat 32 and the third mixing pipe section 13. By rotating the second threaded seat 32 relative to the third mixing pipe section 13, an axial movement of the air outlet pipe 3 relative to the third mixing pipe section 13 can be formed, adjusting the mixing length of the third mixing pipe section 13 and improving the applicability.

[0036] The gas mixing device in this embodiment is used for mixing at least two or more gases. Different gases enter the intake pipe 2 from the main intake conduit 21 and the sub-intake conduit 22 respectively. For example, the first gas enters from the main intake conduit 21, and the second gas enters the intake pipe 2 from the sub-intake conduit 22. The second gas mixes with the first gas inside the intake pipe 2 and generates a first gas swirl for the first-stage mixing of the second gas and the first gas, forming a mixed gas. The mixed gas enters the first mixing pipe section 11 to form a second gas swirl, generating a second-stage mixing. Then, the mixed gas enters the second mixing pipe section 12 and is separated by the flow baffle 15 and then merged, generating a third-stage mixing. Next, the mixed gas enters the third mixing pipe section 13 to form a third gas swirl, generating a fourth-stage mixing. Finally, it is discharged from the air outlet conduit 31 of the air outlet pipe 3. The gas can undergo four stages of mixing inside this gas mixing device, and the mixed gas is stably output, achieving pipeline-type dynamic and efficient mixing.

[0037] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes, should be covered within the protection scope of the present invention.

Claims

1. A gas mixing device, comprising a gas mixing pipe body (1), an air inlet pipe (2) and an air outlet pipe (3), wherein the air inlet pipe (2), the gas mixing pipe body (1) and the air outlet pipe (3) are sequentially connected and communicated, characterized in that: The gas mixing pipe body (1) comprises a first gas mixing pipe section (11), a second gas mixing pipe section (12) and a third gas mixing pipe section (13) which are connected in sequence, and the inner diameter of the second gas mixing pipe section (12) is larger than that of the first gas mixing pipe section (11) and the third gas mixing pipe section (13); The inner wall of the first gas mixing pipe section (11) is provided with a first spiral sheet (14) for guiding gas, and the gas inlet end of the first gas mixing pipe section (11) is fixedly connected to and communicated with the gas inlet pipe (2); A flow baffle (15) is arranged inside the second gas mixing pipe section (12), and the flow baffle (15) is provided with a plurality of flow holes (151) penetrating the flow baffle (15); The inner wall of the third gas mixing pipe section (13) is provided with a second spiral sheet (16) for guiding gas, and the gas outlet pipe (3) is movably connected to the third gas mixing pipe section (13) in the axial direction to adjust the gas mixing length of the third gas mixing pipe section (13); A second threaded seat (32) is fixedly provided at the air inlet end of the air outlet pipe (3), and the second threaded seat (32) is provided to connect the third mixing pipe section (13) and the exhaust hole (33) of the air outlet pipe (3), and a threaded groove (34) matching the second spiral sheet (16) on the outside of the second threaded seat (32) forms a threaded connection between the second threaded seat (32) and the third mixing pipe section (13).

2. The gas mixing device according to claim 1, characterized in that: A main intake duct (21) is arranged at the intake end of the intake pipe (2), a first threaded seat (23) threadedly fixedly connected to the first mixing pipe section (11) is arranged at the outlet end of the intake pipe (2), a plurality of branch intake ducts (22) are arranged between the first threaded seat (23) and the main intake duct (21), and an intake direction of the branch intake ducts (22) is tangent to the intake pipe (2).

3. The gas mixing device according to claim 2, characterized in that: The direction of the gas swirl generated inside the air intake pipe (2) when the sub-air intake duct (22) takes in air is the same as the direction of the gas swirl generated when the first spiral blade (14) guides air.

4. The gas mixing device according to claim 3, characterized in that: The direction of the gas swirl generated when the first spiral blade (14) guides the gas is the same as the direction of the gas swirl generated when the second spiral blade (16) guides the gas.

5. The gas mixing device according to claim 4, characterized in that: The first end of the air outlet pipe (3) is located outside the air mixing pipe body (1), an air outlet conduit (31) is provided at the first end of the air outlet pipe (3), the second end of the air outlet pipe (3) is located inside the air mixing pipe body (1), and a second threaded seat (32) is fixedly provided at the second end of the air outlet pipe (3).

6. The gas mixing device according to claim 1, 3, 4 or 5, characterized in that: The sum of the radial areas of all the flow holes (151) on the flow baffle (15) is equal to the radial flow area of ​​the first mixing pipe section (11) or the radial flow area of ​​the third mixing pipe section (13).

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