Multi-stage mixing device

Abstract

The utility model discloses a multistage mixing device which comprises a pipe body, at least two channel groups which are sequentially communicated and are used for liquid to flow unidirectionally are arranged in the pipe body, each channel group comprises a liquid inlet flow channel, a contraction flow channel, a transition flow channel, a diffusion flow channel and a mixing flow channel which are sequentially connected, the inner diameter of each contraction flow channel is gradually contracted from the liquid inlet flow channel to the transition flow channel, and the inner diameter of each diffusion flow channel is gradually reduced from the liquid inlet flow channel to the mixing flow channel. The inner diameter of the diffusion runner is gradually increased in the direction from the transition runner to the mixing runner; the pipe body is further provided with an air suction flow channel, the air suction flow channel is communicated with the diffusion flow channel located at the most upstream in the liquid flowing direction, and the mixing flow channel in the previous channel set is communicated with the liquid inlet flow channel in the next channel set to form a mixing cavity. Gas and liquid are extruded and fused to pass through the transition flow channel, and the gas and the liquid are collided and torn through at least two times of decompression diffusion, so that mixing is more sufficient and uniform, and the mixing effect is remarkable; the whole structure is simple and the mixing efficiency is high.

Description

Technical Field

[0001] The utility model relates to a mixing device, in particular to a multi-stage mixing device. Background Art

[0002] For the mixing of gas and liquid, or liquid and liquid, the prior art will use a Venturi jet structure in the pipeline. Generally, these structures adopt a single-point mixing method. In the process of gas-liquid mixing, it is found that the bubbles in the liquid are large and the mixing effect is not ideal. Other composite structures are installed in some pipelines, resulting in a complex overall structure and high structural cost. Utility Model Content

[0003] The utility model aims to solve at least one of the above-mentioned technical problems in the related art to a certain extent. To this end, the utility model proposes a multi-stage mixing device.

[0004] To achieve the above purpose, the technical solution of the utility model is as follows:

[0005] According to the multi-stage mixing device of the first aspect of the present invention, the multi-stage mixing device comprises a tube body, wherein the tube body is provided with at least two groups of channels connected in sequence and for unidirectional flow of liquid, wherein the channel groups comprise a liquid inlet channel, a contraction channel, a transition channel, a diffusion channel and a mixing channel connected in sequence, wherein the inner diameter of the contraction channel gradually contracts from the liquid inlet channel toward the transition channel, and the inner diameter of the diffusion channel gradually expands from the transition channel toward the mixing channel; wherein,

[0006] The tube body is also provided with an intake channel, which is connected to the diffusion channel located at the most upstream along the liquid flow direction, and the mixing channel in the previous channel group is connected to the liquid inlet channel in the next channel group to form a mixing chamber.

[0007] The multi-stage mixing device according to the embodiment of the utility model has at least the following beneficial effects: the gas and liquid are squeezed and fused through the transition flow channel, and the gas and liquid collide and tear after at least two decompression diffusion effects, so that the mixing is more sufficient and uniform, and the mixing effect is significant; the overall structure is simple and the mixing efficiency is high.

[0008] According to some embodiments of the present invention, the mixing channel in the previous channel group and the liquid inlet channel in the next channel group share the same inner cavity in the tube body to form the mixing cavity.

[0009] According to some embodiments of the present invention, the axial length of the mixing chamber is 1 to 2 times the inner diameter of the liquid inlet channel.

[0010] According to some embodiments of the present invention, the inner diameter of the liquid inlet channel is equal to the inner diameter of the mixing channel.

[0011] According to some embodiments of the utility model, the air intake duct is connected to an air intake pipe, and an end of the air intake pipe away from the air intake duct is provided with a dustproof suction head.

[0012] According to some embodiments of the present invention, two groups of channel groups are provided in the tube body, and the axial length of the diffusion channel located upstream is greater than the axial length of the diffusion channel located downstream.

[0013] According to some embodiments of the present invention, the inner diameter of the diffuser channel located upstream is 1 to 3 times the inner diameter of the liquid inlet channel, and the inner diameter of the diffuser channel located downstream is not larger than the inner diameter of the liquid inlet channel.

[0014] According to some embodiments of the present invention, the inner diameter of the contraction channel is 0.5 to 2 times the inner diameter of the liquid inlet channel.

[0015] According to some embodiments of the present invention, the inner diameter of the transition channel is 0.25 to 0.5 times the inner diameter of the liquid inlet channel.

[0016] According to some embodiments of the present invention, the inner diameter of the suction flow channel is no greater than 0.1 times the inner diameter of the liquid inlet flow channel.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 yes Figure 1 A cross-sectional view of the internal structure;

[0021] Figure 3 yes Figure 1 Add a schematic diagram of the intake duct.

[0022] Reference numerals: tube body 100 ; suction flow channel 110 ; mixing chamber 120 ; channel group 200 ; liquid inlet flow channel 210 ; contraction flow channel 220 ; transition flow channel 230 ; diffusion flow channel 240 ; mixing flow channel 250 ; air inlet pipe 300 ; dust-proof suction head 310 . DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0024] The utility model relates to a multi-stage mixing device, comprising a pipe body 100.

[0025] like Figure 1 and Figure 2 As shown, the tube body 100 can be set as a straight tube structure with a linear axis. At least two groups of channel groups 200 are provided in the tube body 100, and the channel groups 200 can be 2 groups, 3 groups or more. Each group of channel groups 200 is connected in sequence along the axial direction of the tube body 100. After the liquid enters the tube body 100, it will flow unidirectionally along each channel group 200 in sequence. The channel group 200 includes a liquid inlet channel 210, a contraction channel 220, a transition channel 230, a diffusion channel 240 and a mixing channel 250 connected in sequence. In this embodiment, two channel groups 200 are set in the tube body 100 as an example for explanation. In the direction shown in the figure, the liquid inlet channel 210, the contraction channel 220, the transition channel 230, the diffusion channel 240 and the mixing channel 250 of each channel group 200 are distributed in sequence from left to right. The axial cross-section of the contraction channel 220 is conical. The inner diameter of the contraction channel 220 gradually decreases from the liquid inlet channel 210 to the transition channel 230. In the figure, the left end of the contraction channel 220 is a large-mouth end connected to the liquid inlet channel 210, and the right end of the contraction channel 220 is a small-mouth end connected to the transition channel 230. The axial cross-section of the diffusion channel 240 is conical. The left end of the diffusion channel 240 is a small-mouth end connected to the transition channel 230, and the right end of the diffusion channel 240 is a large-mouth end connected to the mixing channel 250. The inner diameter of the diffusion channel 240 gradually expands from the transition channel 230 to the mixing channel 250. The liquid flows from the channel group 200 located on the leftmost side to the right in sequence, that is, the channel group 200 located on the left of the two adjacent channel groups 200 is on the upstream side. The tube body 100 is also provided with an inhalation channel 110. The inhalation channel 110 is connected to the diffusion channel 240 corresponding to the channel group 200 located on the upstreammost side. The suction flow channel 110 can penetrate the outer wall of the tube body 100 along the radial direction of the tube body 100 or have a certain inclination angle with the axial direction of the tube body 100 and connect to the side wall of the diffusion flow channel 240. In two adjacent channel groups 200, the mixing flow channel 250 in the upper channel group 200 and the liquid inlet flow channel 210 in the lower channel group 200 are connected to each other to form a mixing chamber 120.

[0026] In actual use, Figure 2As shown, two channel groups 200 are set in the tube body 100 for illustration. Both ends of the tube body 100 are connected to pipelines for conveying liquids. In the direction shown in the figure, the channel group 200 located on the left is defined as the first channel group 200, and the channel group 200 located on the right is defined as the second channel group 200. The liquid first enters the liquid inlet channel 210 located on the upstream side (the leftmost end), and the liquid flows to the right. When the liquid flows to the first contraction channel 220, the pressure increases due to the gradual reduction of the inner diameter of the contraction channel 220, and the liquid flow rate increases. When the liquid flows to the first transition channel 230, the pressure reaches the minimum, and the flow rate also increases at the same time. The liquid flows from the transition channel 230 to the right to the first diffusion channel 240. Due to the sudden increase in the volume of the space, the liquid pressure decreases instantly, thereby generating a pressure difference and forming a negative pressure area. At this time, the external gas is sucked into the negative pressure of the negative pressure area through the inlet channel. The gas and liquid intersect and contact and flow into the mixing chamber 120 together, filling the entire space of the mixing chamber 120, thereby achieving a state where the gas and liquid are mixed together, and the speed and force of the jet diffusion cause the two to collide strongly, achieving a preliminary mixing effect. Then, when the gas-liquid mixed liquid in the preliminary mixed state flows to the second contraction channel 220, it will be pressurized again, and the gas-liquid mixed liquid passes through the second transition channel 230. At this time, due to the reduction in the volume of the contraction channel 220, the gas and liquid that were originally separated by a wide distance will be squeezed together and poured out into the small channel of the second transition channel 230. Here, due to the squeezing, the large bubbles will become small bubbles with a smaller diameter, and the liquid that was not mixed with the bubbles will also dissolve into the gas here due to the smaller space and faster speed. When the liquid mixed with the gas is ejected in the second transition channel 230 and reaches the second diffusion channel 240, a pressure difference will also be generated here. However, there is no gas in the second diffusion channel 240 to fill the suddenly enlarged space, so this mixed fluid has to accelerate its own expansion to fill the entire space. At this time, the two substances in the fluid will be torn together, and a more intense collision will occur to achieve a rapid adaptation to the increased space volume. After this series of stages, the two substances will be more evenly and fully fused, and the surface contact area will be larger. The multi-stage mixing device uses at least two groups of channel groups 200 to squeeze and fuse the gas and liquid through the transition channel 230. After at least two decompression diffusion effects, the gas and liquid collide and tear to make the mixing more fully and evenly. The bubble diameter reaches a range between 10 microns and 100 microns, and the mixing effect is significant. The overall structure is simple and the mixing efficiency is high.

[0027] One end of the inhalation flow channel 110 can be directly connected to the external environment, and the outside air can be automatically inhaled under the action of negative pressure. Alternatively, the inhalation flow channel 110 can be connected to an air supply device, and the air supply device can be used to automatically pump air into the inhalation flow channel 110. Alternatively, the inhalation flow channel 110 can be connected to a container storing liquid, and the liquid enters the tube body 100 from the inhalation flow channel 110 and mixes with the liquid in the tube body 100 for use.

[0028] Each channel group 200 can be set as an independent component, and each channel group 200 is connected in sequence to form the above-mentioned tube body 100. Each channel group 200 can also be integrally formed in the tube body 100. In some embodiments of the utility model, such as Figure 1 and Figure 2 As shown, the tube body 100 is integrally formed, and between two adjacent channel groups 200, the mixing channel 250 in the previous channel group 200 and the liquid inlet channel 210 in the next channel group 200 share an inner cavity in the tube body 100, and the inner cavity constitutes the above-mentioned mixing cavity 120. In the mixing cavity 120, there is no obvious boundary between the mixing channel 250 and the liquid inlet channel 210, and the liquid flows and mixes in the mixing cavity 120.

[0029] In some specific embodiments of the present invention, the axial length of the mixing chamber 120 is 1 to 2 times the inner diameter of the liquid inlet channel 210. The inner diameter of the liquid inlet channel is defined as D, and the axial length of the mixing chamber 120 ranges from D to 2D, that is, the axial length of the mixing chamber 120 can be D, 1.2D, 1.5D, 1.8D, 2D, etc. In this range, an effective length can be provided for the gas and liquid to flow and mix, and then enter the next contraction channel 220.

[0030] In some specific embodiments of the present invention, the inner diameter of the liquid inlet channel 210 is equal to the inner diameter of the mixing channel 250 , so that the liquid can flow evenly in the mixing chamber 120 formed by the liquid inlet channel 210 and the mixing channel 250 .

[0031] In some embodiments of the present invention, Figure 3 As shown, the air intake duct 110 is connected to the air intake pipe 300. A dustproof suction head 310 is provided on the end of the air intake pipe 300 away from the air intake duct 110. The dustproof suction head is used to block foreign matter such as dust in the air to prevent foreign matter from entering the air intake duct 110 and causing blockage.

[0032] In some specific embodiments of the present invention, Figure 2 As shown, two groups of channel groups 200 are provided in the tube body 100, and the axial length of the diffusion channel 240 located upstream (left side) is greater than the axial length of the diffusion channel 240 located downstream (right side), so as to ensure the intake volume.

[0033] Further, the inner diameter of the diffuser flow channel 240 located upstream is 1 to 3 times the inner diameter of the liquid inlet flow channel 210, that is, the value range of the inner diameter of the diffuser flow channel 240 located upstream is D to 3D, which can be D, 1.3D, 1.9D, 2D, 2.2D, 2.6D, 3D, etc., that is, the minimum inner diameter of the small port of the diffuser flow channel 240 upstream is D, and the maximum inner diameter of the large port of the diffuser flow channel 240 upstream is 3D. The inner diameter of the diffuser flow channel 240 located downstream is not greater than the inner diameter of the liquid inlet flow channel 210. That is, the maximum inner diameter of the large port of the diffuser flow channel 240 downstream does not exceed D.

[0034] In some specific embodiments of the present utility model, the inner diameter of the contraction channel 220 is 0.5 to 2 times the inner diameter of the liquid inlet channel 210. That is, the value range of the inner diameter of the contraction channel 220 is 0.5D to 2D, which can be 0.5D, 0.7D, D, 1.1D, 1.5D, 2D, etc. The inner diameter of the transition channel 230 is 0.25 to 0.5 times the inner diameter of the liquid inlet channel 210. That is, the value range of the inner diameter of the transition channel 230 is 0.25D to 0.5D, which can be 0.25D, 0.3D, 0.36D, 0.4D, 0.43D, 0.5D, etc. The inner diameter of the suction channel 110 is not greater than 0.1 times the inner diameter of the liquid inlet channel 210. That is, the maximum value of the inner diameter of the suction channel 110 is 0.1D.

[0035] In the description of this specification, the description of reference terms such as "some specific embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A multi-stage mixing device, characterized in that: The invention comprises a tube body (100), wherein the tube body (100) is provided with at least two groups of channel groups (200) which are connected in sequence and provide a unidirectional flow of liquid, wherein the channel group (200) comprises a liquid inlet channel (210), a contraction channel (220), a transition channel (230), a diffusion channel (240) and a mixing channel (250) which are connected in sequence, wherein the inner diameter of the contraction channel (220) gradually contracts from the liquid inlet channel (210) toward the transition channel (230), and the inner diameter of the diffusion channel (240) gradually expands from the transition channel (230) toward the mixing channel (250); wherein: The tube body (100) is also provided with an intake flow channel (110), and along the liquid flow direction, the intake flow channel (110) is connected to the diffusion flow channel (240) located most upstream, and the mixing flow channel (250) in the previous channel group (200) is connected to the liquid inlet flow channel (210) in the next channel group (200) to form a mixing chamber (120).

2. The multi-stage mixing device according to claim 1, characterized in that: The mixing channel (250) in the previous channel group (200) and the liquid inlet channel (210) in the next channel group (200) share the same inner cavity in the tube body (100) to form the mixing cavity (120).

3. The multi-stage mixing device according to claim 1 or 2, characterized in that: The axial length of the mixing chamber (120) is 1 to 2 times the inner diameter of the liquid inlet channel (210).

4. The multi-stage mixing device according to claim 1 or 2, characterized in that: The inner diameter of the liquid inlet flow channel (210) is equal to the inner diameter of the mixing flow channel (250).

5. The multi-stage mixing device according to claim 1, characterized in that: The air intake duct (110) is connected to an air intake pipe (300), and an end of the air intake pipe (300) away from the air intake duct (110) is provided with a dustproof suction head (310).

6. The multi-stage mixing device according to claim 1, characterized in that: Two groups of channel groups (200) are provided in the tube body (100), and the axial length of the diffusion channel (240) located upstream is greater than the axial length of the diffusion channel (240) located downstream.

7. The multi-stage mixing device according to claim 6, characterized in that: The inner diameter of the diffuser flow channel (240) located upstream is 1 to 3 times the inner diameter of the liquid inlet flow channel (210), and the inner diameter of the diffuser flow channel (240) located downstream is not greater than the inner diameter of the liquid inlet flow channel (210).

8. The multi-stage mixing device according to claim 1, characterized in that: The inner diameter of the contraction flow channel (220) is 0.5 to 2 times the inner diameter of the liquid inlet flow channel (210).

9. The multi-stage mixing device according to claim 1, characterized in that: The inner diameter of the transition flow channel (230) is 0.25 to 0.5 times the inner diameter of the liquid inlet flow channel (210).

10. The multi-stage mixing device according to claim 1, characterized in that: The inner diameter of the suction flow channel (110) is no greater than 0.1 times the inner diameter of the liquid inlet flow channel (210).

Images