A mixing device

Abstract

The present invention discloses a mixing device, including a mixing tube and a rectifying container, wherein the mixing tube includes a first top plate, a first tube wall, a second top plate and a second tube wall, wherein the first tube wall is connected to the lower side of the first top plate, the second tube wall is connected to the upper side of the first top plate, the second top plate is connected to an end of the second tube wall away from the first top plate, and the second tube wall is provided with at least one through hole for an aerosol inlet pipe to penetrate; the rectifying container is connected to the first top plate, a receiving cavity is provided in the rectifying container, a plurality of rectifying holes penetrating the receiving cavity are also provided on the side wall of the rectifying container, the receiving cavity is connected to the aerosol inlet pipe, the receiving cavity is connected to the interior of the first tube wall through the rectifying hole, the opening direction of the rectifying hole is arranged upward, and the angle between the rectifying hole and the vertical direction is between 30-65°, so that the aerosol flowing out of the rectifying hole can collide with the first tube wall or the first top plate. The scheme adopted by the present invention has the advantage of greatly improving the uniformity of aerosol mixing.

Description

Technical Field

[0001] The invention relates to the technical field of precision instruments, in particular to a mixing device. Background Art

[0002] The dust particle counter is an instrument used to measure the number and size distribution of dust particles per unit volume in a clean environment. It can be widely used in the electronics industry, pharmaceutical workshops, semiconductors, optical or precision machining, plastics, spray painting, hospitals, environmental protection, testing institutes and other production enterprises and scientific research departments, as well as provincial and municipal drug testing institutes, blood centers, epidemic prevention stations, disease control centers, quality supervision institutes and other authoritative institutions.

[0003] In order to ensure the accuracy and reliability of the dust particle counter, it is usually necessary to calibrate the dust particle counter regularly. Generally, the aerosol generating system used to calibrate the dust particle counter to be tested includes a mixing device for mixing the aerosol and a sampling head arranged at the bottom of the mixing device for sampling the aerosol. Whether the mixing device can mix the aerosol evenly will directly affect the measurement results of the dust particle counter, and further affect the evaluation of the measurement accuracy of the dust particle counter to be tested by the testing party. Summary of the invention

[0004] In order to overcome the defects in the prior art, an embodiment of the present invention provides a mixing device, which is used to solve at least one of the above problems.

[0005] The embodiment of the present application discloses: a mixing device, which is connected to an aerosol inlet pipe and is used to mix the aerosol, comprising:

[0006] A mixing tube, the mixing tube comprising a first top plate, a first tube wall, a second top plate and a second tube wall, the first tube wall being connected to the lower side of the first top plate, the second tube wall being connected to the upper side of the first top plate, the second top plate being connected to an end of the second tube wall away from the first top plate, and the second tube wall being provided with at least one through hole for the aerosol inlet tube to penetrate;

[0007] A rectifying container, wherein the rectifying container is connected to the first top plate, a accommodating cavity is provided in the rectifying container, a plurality of rectifying holes penetrating the accommodating cavity are provided on the side wall of the rectifying container, the accommodating cavity is communicated with the aerosol inlet pipe, the accommodating cavity is communicated with the interior of the first tube wall through the rectifying holes, and the opening direction of the rectifying holes is arranged upward, so that the aerosol flowing out of the rectifying holes can collide with the first tube wall or the first top plate.

[0008] Specifically, a third tube wall is further provided inside the second tube wall, the third tube wall is sleeved outside the rectifying container and communicated with the accommodating cavity, the height of the third tube wall is greater than the height of the through hole, and the height of the third tube wall is less than the height of the second tube wall.

[0009] Specifically, the axis of the through hole and the center line of the second tube wall are offset.

[0010] Specifically, the rectifying container includes a connecting portion connected to the first top plate and a rectifying portion, the accommodating cavity passes through the connecting portion and extends into the rectifying portion, and the rectifying hole is arranged on a side wall of the rectifying portion.

[0011] Specifically, the rectifying portion includes a first end and a second end, one end of the first end is connected to the connecting portion, and the other end of the first end is connected to the second end, the rectifying hole is arranged on the side wall of the first end, and the cross-sectional area of ​​the first end increases from the connecting portion to the second end.

[0012] Specifically, the cross-sectional area of ​​the second end decreases from the connecting portion toward the second end.

[0013] Specifically, a plurality of rows of rectifying holes are arranged at intervals on the side wall of the first end, and a plurality of rectifying holes in each row are evenly distributed along the circumference of the first end.

[0014] Specifically, in different rows of rectifying holes, the angles between the rectifying holes in each row and the vertical direction are different.

[0015] Specifically, the mixing device further includes a plurality of flow equalizer plates, a plurality of flow equalizer holes are provided on the flow equalizer plates, and the plurality of flow equalizer plates are arranged at intervals on the inner side of the first tube wall along the long axis direction of the first tube wall.

[0016] Specifically, the angle between the rectifying hole and the vertical direction is between 30° and 65°.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The mixing device described in this embodiment has a rectifying container in its mixing tube, and the rectifying container has a accommodating cavity and a rectifying hole penetrating the side wall of the accommodating cavity. The opening direction of the rectifying hole is set upward, and the angle α between the rectifying hole and the vertical direction is between 30 and 60 degrees, so that the aerosol entering from the aerosol inlet pipe is first mixed in the accommodating cavity, and then the aerosol ejected from the rectifying hole can collide with the first tube wall or the first top plate of the mixing tube to be mixed again, thereby greatly improving the uniformity of aerosol mixing.

[0019] 2. The aerosol introduced through the aerosol inlet pipe can slowly and rotationally rise from the bottom of the second tube wall to the top of the third tube wall, and then fall into the containing cavity through the third tube wall. In this process, the uniformity of the aerosol mixing is further improved.

[0020] 3. The first end of the rectifying portion is configured such that the cross-sectional area gradually increases from top to bottom, so that the rectifying holes distributed on its side wall can be as close to the first tube wall or the first top plate as possible, so as to shorten the travel of the aerosol to the first tube wall or the first top plate, avoid affecting the impact force on the aerosol, and further affect the mixing effect of the aerosol.

[0021] 4. The second end of the rectifying part is set in a manner that the cross-sectional area gradually decreases from top to bottom, which can guide the flow of the aerosol, allowing the aerosol to flow smoothly downward, and prevent the aerosol from forming a vortex at the bottom of the second end, affecting its falling in the aerosol mixing tube.

[0022] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a schematic structural diagram of the mixing device described in an embodiment of the present invention;

[0025] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0026] Figure 3 Schematic diagram of the connection between the aerosol inlet pipe and the second tube wall in an embodiment of the present invention.

[0027] The figure marks of the above drawings are: 1-mixing tube, 11-first top plate, 12-first tube wall, 13-second top plate, 14-second tube wall, 141-through hole, 15-third tube wall, 2-rectifying container, 21-accommodating chamber, 22-rectifying hole, 230-connecting part, 241-first end, 242-second end, 3-aerosol inlet pipe, 4-uniform flow plate, 41-uniform flow hole. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Combination Figures 1 to 2 As shown, the mixing device described in this embodiment is connected to the aerosol inlet pipe 3 and is used to mix the aerosol. The mixing device includes:

[0030] The mixing tube 1 comprises a first top plate 11, a first tube wall 12, a second top plate 13 and a second tube wall 14. The mixing tube 1 is vertically arranged, the first tube wall 12 is connected to the lower side of the first top plate 11, the second tube wall 14 is connected to the upper side of the first top plate 11, and the second top plate 13 is connected to an end of the second tube wall 14 away from the first top plate 11. The second tube wall 14 is provided with at least one through hole 141 for the aerosol inlet pipe 3 to penetrate.

[0031] A rectifying container 2, the rectifying container 2 is connected to the first top plate 11, a receiving chamber 21 is provided in the rectifying container 2, and a plurality of rectifying holes 22 penetrating the receiving chamber 21 are provided on the side wall of the rectifying container 2. The receiving chamber 21 is communicated with the aerosol inlet pipe 3, and the receiving chamber 21 is communicated with the interior of the first tube wall 12 through the rectifying holes 22. The opening direction of the rectifying holes 22 is set upward, and the angle between the rectifying holes 22 and the vertical direction is between 30 and 65 degrees, for example, 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees, 60 degrees, 65 degrees, so that the aerosol flowing out of the rectifying holes 22 can collide with the first tube wall 12 or the first top plate 11.

[0032] Specifically, in this embodiment, the first tube wall 12 and the second tube wall 14 are generally cylindrical and coaxially arranged. The first top plate 11 separates the first tube wall 12 and the second tube wall 14 into relatively independent spaces. The second tube wall 14 is provided with a through hole 141 for the aerosol inlet pipe 3 to penetrate into the interior thereof. The first top plate 11 is provided with a channel that allows the second tube wall 14 (or the aerosol inlet pipe 3) to communicate with the accommodating chamber 21 of the rectifying container 2. In other words, the aerosol inside the second tube wall 14 cannot directly enter the first tube wall 12 through the first top plate 11. The aerosol entering from the aerosol inlet pipe 3 first passes through the accommodating chamber 21 of the rectifying container 2 for a mixing, and then is ejected upward through the rectifying hole 22, so that the aerosol collides with the first tube wall 12 or the first top plate 11. The aerosol after the collision moves violently in the vertical or horizontal direction to achieve secondary mixing, thereby achieving the purpose of uniform mixing.

[0033] With the above structure, the mixing device described in this embodiment has a rectifying container 2 in its mixing tube 1, and the rectifying container 2 has a accommodating cavity 21 and a rectifying hole 22 penetrating the side wall of the accommodating cavity 21. The opening direction of the rectifying hole 22 is set upward, and the angle α between the rectifying hole 22 and the vertical direction is between 30 and 60°, so that the aerosol entering from the aerosol inlet pipe 3 is first mixed in the accommodating cavity 21, and then the aerosol ejected from the rectifying hole 22 can collide with the first tube wall 12 or the first top plate 11 of the mixing tube 1 to be mixed again, thereby greatly improving the uniformity of aerosol mixing.

[0034] Specifically, Figure 1 As shown, a third tube wall 15 is further provided inside the second tube wall 14, and the third tube wall 15 is sleeved outside the rectifying container 2 and communicated with the accommodating chamber 21. The third tube wall 15 is substantially cylindrical, and its inner diameter is smaller than the inner diameter of the second tube wall 14, and it is preferably coaxially arranged with the second tube wall 14. The height of the third tube wall 15 is greater than the height of the through hole 141 on the second tube wall 14, and the height of the third tube wall 15 is less than the height of the second tube wall 14. Preferably, the through hole 141 can be arranged close to the bottom of the second tube wall 14.

[0035] With the above structure, the aerosol introduced into the aerosol inlet pipe 3 can slowly rise from the bottom of the second tube wall 14 to the top of the third tube wall 15, and then fall into the containing chamber 21 through the third tube wall 15. In this process, the uniformity of the aerosol mixing is further improved.

[0036] Specifically, Figure 3As shown, the axis of the through hole 141 is offset from the center line of the second tube wall 14. In other words, in this embodiment, the axis direction of the through hole 141 does not coincide with the radial direction of the cylindrical second tube wall 14.

[0037] With the above structure, the aerosol introduced from the aerosol inlet pipe 3 enters the second tube wall 14 in a rotating wind outlet manner, and the aerosol rotates along the inner side of the second tube wall 14 to rise to the top of the third tube wall 15, and then falls into the accommodating chamber 21, so that the movement mode of the aerosol is similar to that of a tornado, which is beneficial to improving the uniformity of aerosol mixing.

[0038] Specific, focus on Figure 2 As shown, the rectifying container 2 includes a connecting portion 230 connected to the first top plate 11 and a rectifying portion, the accommodating cavity 21 passes through the connecting portion 230 and extends into the rectifying portion, and the rectifying hole 22 is arranged on the side wall of the rectifying portion. More specifically, the rectifying container 2 is generally an integrated rotating body structure, and the accommodating cavity 21 is generally cylindrical for easy processing. The upper end of the connecting portion 230 is provided with a threaded structure for connecting to the first top plate 11, and the lower end is connected to the rectifying portion. The accommodating cavity 21 extends from the upper end of the connecting portion 230 to the lower end thereof, and extends into the rectifying portion, but does not pass through the rectifying portion.

[0039] With the above structure, the rectifying container 2 described in this embodiment has a simple structure, a simple processing technology and is easy to install.

[0040] For details, please refer to Figure 2 As shown, the rectifying portion includes a first end 241 and a second end 242. One end of the first end 241 is connected to the connecting portion 230, and the other end of the first end 241 is connected to the second end 242, and a plurality of rectifying holes 22 are arranged on the side wall of the first end 241. In the direction from the connecting portion 230 to the second end 242, the cross-sectional area of ​​the first end 241 gradually increases. In other words, along the axial direction, the cross-sectional area of ​​the first end 241 gradually increases from top to bottom. In other words, along the axial direction, the outer diameter of the first end 241 gradually increases from top to bottom.

[0041] By adopting the above scheme, the first end 241 whose cross-sectional area gradually increases from top to bottom can make the rectifying holes 22 distributed thereon as close as possible to the first tube wall 12 or the first top plate 11, so as to shorten the travel of the aerosol to the first top plate 11 or the first tube wall 12, avoid the impact force on the aerosol being affected, and thus affect the mixing effect of the aerosol.

[0042] For details, please refer to Figure 2As shown, the cross-sectional area of ​​the second end 242 gradually decreases from the connecting portion 230 to the second end 242. That is, along the axis direction, the cross-sectional area of ​​the second end 242 gradually decreases from top to bottom. In other words, along the axis direction, the outer diameter of the second end 242 gradually decreases from top to bottom.

[0043] By adopting the above solution, the second end 242 can guide the flow of the aerosol, so that the aerosol flows downward smoothly, and avoids the aerosol from forming a vortex at the bottom of the second end 242 to affect its falling in the first tube wall 12.

[0044] Continue to refer to Figure 2 As shown, in the direction from the connecting portion 230 to the second end 242, a plurality of rows of rectifying holes 22 are arranged on the side wall of the first end 241 at intervals. In other words, along the axial direction of the first end 241, a plurality of rows of rectifying holes 22 are arranged on the side wall of the first end 241 at intervals. The plurality of rectifying holes 22 in each row are evenly arranged along the circumference of the first end 241. Furthermore, the number of rectifying holes 22 included in each row is substantially the same. The angles α between the plurality of rectifying holes 22 in the same row of rectifying holes 22 and the vertical direction are all the same, while the angles α between the rectifying holes 22 in different rows and the vertical direction are different, and preferably, the angles between the rectifying holes 22 in each row and the vertical direction gradually increase from the connecting portion 230 to the second end 242. For example, in this embodiment, five rows of rectifying holes 22 are provided on the side wall of the first end 241 of the rectifying part. From top to bottom, the angles between the five rows of rectifying holes 22 and the vertical direction are α1, α2, α3, α4, and α5, respectively, wherein α5>α4>α3>α2>α1.

[0045] With the above solution, since the outer diameter of the first end 241 of the rectifying portion gradually increases, the outer diameters of the first ends 241 corresponding to the rectifying holes 22 in different rows are different. Therefore, when each row has the same number of rectifying holes 22, and the rectifying holes 22 in each row are evenly distributed in the circumference of the first end 241, the rectifying holes 22 in two adjacent rows are staggered, so that the aerosol can be sprayed from all directions, which is conducive to uniform mixing of the aerosol. In addition, in the direction from top to bottom, the angle between each row of rectifying holes 22 and the vertical direction gradually increases, which also allows the aerosol to be sprayed from all directions, which is further conducive to uniform mixing of the aerosol.

[0046] Specifically, refer to Figure 1 and Figure 2As shown, the mixing device further includes a plurality of flow equalizer plates 4, and a plurality of flow equalizer holes 41 are provided on the flow equalizer plates 4. The plurality of flow equalizer plates 4 are arranged at intervals on the inner side of the first tube wall 12 along the long axis direction of the first tube wall 12. With the above solution, the plurality of flow equalizer plates 4 divide the first tube wall 12 into a plurality of interconnected smaller spaces, which can slow down the speed of the aerosol moving downward in the first tube wall 12, so that the aerosol is fully mixed in each space it passes through, thereby improving the uniformity of mixing.

[0047] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A mixing device, connected to an aerosol inlet pipe, for mixing aerosols, characterized in that: include: A mixing tube, the mixing tube comprising a first top plate, a first tube wall, a second top plate and a second tube wall, the first tube wall being connected to the lower side of the first top plate, the second tube wall being connected to the upper side of the first top plate, the second top plate being connected to an end of the second tube wall away from the first top plate, and the second tube wall being provided with at least one through hole for the aerosol inlet tube to penetrate; A rectifying container, wherein the rectifying container is connected to the first top plate, a receiving cavity is provided in the rectifying container, and a plurality of rectifying holes penetrating the receiving cavity are further provided on the side wall of the rectifying container, the receiving cavity is communicated with the aerosol inlet pipe, the receiving cavity is communicated with the interior of the first tube wall through the rectifying holes, and the opening direction of the rectifying holes is arranged upward, so that the aerosol flowing out of the rectifying holes can collide with the first tube wall or the first top plate; the rectifying container comprises a connecting portion connected to the first top plate and a rectifying portion, the receiving cavity penetrates the connecting portion and extends into the rectifying portion, and the rectifying holes are arranged on the side wall of the rectifying portion; the rectifying portion comprises a first end and a second end, one end of the first end is connected to the connecting portion, and the other end of the first end is connected to the second end, and the rectifying holes are arranged on the side wall of the first end, and the cross-sectional area of ​​the first end increases from the connecting portion to the second end; the cross-sectional area of ​​the second end decreases from the connecting portion to the second end; the angle between the rectifying hole and the vertical direction is between 30 and 65 degrees.

2. The mixing device according to claim 1, characterized in that A third tube wall is also provided inside the second tube wall. The third tube wall is sleeved outside the rectifying container and communicated with the accommodating cavity. The height of the third tube wall is greater than the height of the through hole, and the height of the third tube wall is less than the height of the second tube wall.

3. The mixing device according to claim 1, characterized in that The axis of the through hole is staggered with the center line of the second tube wall.

4. The mixing device according to claim 1, characterized in that A plurality of rows of rectifying holes are arranged at intervals on the side wall of the first end, and a plurality of rectifying holes in each row are evenly distributed along the circumference of the first end.

5. The mixing device according to claim 4, characterized in that In different rows of rectifying holes, the angles between each row of rectifying holes and the vertical direction are different.

6. The mixing device according to claim 1, characterized in that The mixing device further comprises a plurality of flow equalizer plates, a plurality of flow equalizer holes are arranged on the flow equalizer plates, and the plurality of flow equalizer plates are arranged at intervals on the inner side of the first tube wall along the long axis direction of the first tube wall.

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