TWI704959B - Multi-cyclone dust filter - Google Patents

Abstract

A multi-cyclone dust filter device includes a dust collection chamber for collecting a dust, a cyclone chamber that provides a dust-to-be-filtered gas to enter and forms a first cyclone into the dust collection chamber, and a cyclone chamber arranged at A diversion assembly between the dust collection chamber and the cyclone chamber; the diversion assembly includes a first diversion tube that receives the dust-to-be-filtered gas returned from the dust collection chamber and forms a second cyclone, and an and The first guide tube is coaxially oriented and separated by an airflow confluence interval. The first guide tube is provided with at least one dust filter hole for the dust in the second cyclone to discharge, so that the first guide tube The two guide pipes have to combine the first cyclone and the second cyclone by the confluence distance of the airflow to form a third cyclone to discharge.

Description

Multi-cyclone dust filter

The invention relates to a dust filter device for cyclone separation of dust, especially a multi-cyclone type dust filter device.

Cyclone separation is actually a kind of centrifugal sedimentation, which uses centrifugal force to rotate particles in a vortex airflow at a high speed. The faster the rotation speed, the greater the centrifugal sedimentation speed obtained by the particles, and the separation of particles and airflow is achieved. The conventional cyclone separator is generally shown in Figure 1. It is mainly composed of a separation cylinder 8. The wall of the separation cylinder 8 is provided with an air inlet 81. The diameter of the bottom of the separation cylinder 8 is tapered, and the top of the separation cylinder 8 is There is a suction duct 82. During implementation, a gas containing dust particles enters through the intake inlet 81, the gas then forms a descending swirling flow along the inner wall of the separation cylinder 8, and finally due to the suction force exerted by the suction pipe 82, An ascending airflow is formed in the separation cylinder 8, and the dust cannot rise with the ascending airflow due to its own gravity, and sinks to the bottom of the separation cylinder 8 to produce a dust collection effect. The related patented technology is disclosed in TW I558462.

The dust filtering effect of the conventional cyclone separator is quite limited. If you want to increase the dust filtering effect of the cyclone separator, there are two main implementations. One is to increase the chamber volume in the separation cylinder, and the other is to set multiple layers in the separation cylinder. Dust filter inner cylinder, such as TW I411422, TW 201340929, CN 103181741, CN 1572220A, JP 2000-254551A, JP 2005-103251A, JP 2005-224602A, JP 2006-205162A, JP 2006-272322A, JP 2006-297057A, JP 2006- 346669A, JP 2014-83478A, JP 2015-131264, US 2017/0202418, US 2018/0036746. However, if implemented by increasing the volume of the chamber in the separation cylinder, it will undoubtedly make the overall volume of the cyclone separator tend to be huge. If the implementation of the multi-layer dust filter inner cylinder will cause the The structure of the cyclone separator tends to be complicated. In addition to being unfavorable for maintenance, the regular replacement of the dust filter cylinder is a major problem. For example, in the implementation environment for filtering dangerous gases, once the dust filter cylinder needs to be replaced, it is necessary Shut down the entire system, or even shut down for a period of time, before replacing it. Although the technology of cyclone separation has been successfully applied to household dust collectors in recent years, household dust collectors only need to collect a small amount of dust particles, and the requirements for dust filtering effect are relatively small compared to industrial needs, and can use small and simple structure cyclones If the separator is used in industrial implementation with the same structure, its dust filtering effect obviously does not meet the requirements of industrial use.

In addition, the applicant in this case has also proposed similar patented technologies, as disclosed in TW I562750 and TW I649116.

The main purpose of the present invention is to improve the dust collection efficiency of the multi-cyclone dust filter device and simplify the dust filter device.

In order to achieve the above objective, the present invention provides a multi-cyclone dust filter device, including a dust collection chamber for collecting a dust, and a dust-filtering gas to enter and form a first cyclone into the dust collection chamber. A cyclone chamber, and a diversion assembly disposed between the dust collection chamber and the cyclone chamber; the diversion assembly includes a first that receives the dust-to-be-filtered gas returned from the dust collection chamber and forms a second cyclone A draft tube and a second draft tube coaxially with the first draft tube and separated by an airflow confluence interval, so that the first draft tube is provided with at least one dust filter hole for the second cyclone The dust is discharged, and the dust filter hole directly faces the side wall of the cyclone chamber, so that the second flow guide pipe is combined with the first cyclone and the second cyclone by the airflow confluence distance to form a third cyclone to be discharged.

In one embodiment, the dust filter hole is arranged at one end of the first draft tube located at the airflow confluence interval, and the end is extended to assist the dust enter the first cyclone and then flow back into the dust collection chamber A first retaining wall and a third retaining wall.

In one embodiment, a first retaining wall and a second retaining wall extend from the first and second retaining walls at opposite ends of the airflow confluence distance, and the outer periphery of the first retaining wall Larger than the outer periphery of the second retaining wall.

In one embodiment, the third retaining wall further extends toward the dust collection chamber with a diversion cover that assists the dust falling to the dust collection chamber, and the diversion cover and the first diversion tube A gap is formed between.

In one embodiment, the inner diameter of the second draft tube is larger than the inner diameter of the first draft tube.

In one embodiment, the inner diameter of the first guide tube is tapered from one end of the dust collection chamber to the other end of the airflow confluence interval.

In one embodiment, the inner diameter of the second guide tube gradually increases from one end at the air flow confluence distance to the other end at the exhaust port.

In one embodiment, the first draft tube is connected between the dust collection chamber and the cyclone chamber with a plurality of brackets.

10: Dust filter

11: Dust collection chamber

12: Cyclone chamber

121: air inlet

122: sidewall

123: exhaust port

20: Diversion component

21: The first draft tube

211: Shroud

212: Spacing

213: Dust filter hole

214: The first retaining wall

215: third retaining wall

216: Bracket

22: The second draft tube

221: second retaining wall

23: Confluence spacing of airflow

30: External air extractor

40: Dust

50: first cyclone

60: Second Cyclone

70: Third Cyclone

8: Separation tube

81: intake inlet

82: exhaust pipe

Figure 1. A schematic diagram of the implementation of a conventional cyclone separator.

Fig. 2 is a schematic structural diagram of an embodiment of the present invention.

Fig. 3 is a schematic top view of the structure of an embodiment of the present invention.

Figure 4-1 is a schematic diagram of the implementation of the first cyclone according to an embodiment of the present invention.

Figure 4-2 is a schematic diagram of the implementation of the second cyclone and the third cyclone according to an embodiment of the present invention.

Figure 4-3 is a schematic diagram of a cyclone combination implementation of an embodiment of the present invention.

Figure 4-4 is an enlarged schematic diagram of the implementation of the first cyclone and the second cyclone according to an embodiment of the present invention.

Figure 4-5 is an enlarged schematic diagram of a cyclone combination implementation of an embodiment of the present invention.

Fig. 5 is a schematic diagram of a three-dimensional structure of a first draft tube according to an embodiment of the invention.

The detailed description and technical content of the present invention are now described in conjunction with the drawings as follows: Hereinafter, the terms "first" and "second" used for elements are intended to distinguish between these elements and are not intended to limit these elements. The order of precedence. In addition, the spatial relative terms such as "top", "bottom edge", "upward", and "downward" contained in this article are based on the directions drawn in the schema of this article. Understandably, these spatial relative terms can be changed at any time. The drawing direction of the drawing is changed. For example, once the drawing of this drawing is horizontal, the original "top" and "bottom" will be changed to "left" and "right" respectively.

Please refer to FIGS. 2 to 4-3. The present invention provides a multi-cyclone dust filter device 10, which can be used in industrial processes that require clean working gas. The dust filter device 10 includes a dust collection chamber 11 for collecting a dust 40 in a dust-filtered gas, a cyclone chamber 12 connected to the dust collection chamber 11, and a guide set in the cyclone chamber 12 Flow component 20. Wherein, the cyclone chamber 12 has a first space width, and the dust collection chamber 11 has a second space width greater than the first space width. Furthermore, the cyclone chamber 12 is in communication with the dust collection chamber 11 so that gas can flow between the cyclone chamber 12 and the dust collection chamber 11.

The cyclone chamber 12 has an air inlet 121, a side wall 122 connected to the air inlet 121, and an air outlet 123. In one embodiment, the air inlet 121 may be a tubular structure protruding from the side wall 122. Furthermore, the air inlet 121 is disposed at an end of the cyclone chamber 12 away from the dust collection chamber 11, and the exhaust port 123 is disposed at the top end of the cyclone chamber 12.

The flow guiding assembly 20 is disposed in the cyclone chamber 12. The guide assembly 20 has a first guide tube 21 that receives the dust-to-be-filtered gas returned from the dust collection chamber 11 and guides the dust-to-be-filtered gas to flow spirally to form a second cyclone 60. The flow tube 21 is located in the same axial direction with the first flow guide tube 21 and has an airflow confluence distance 23 and is separated from the second flow guide tube 22. The first flow tube 21 is connected to the cyclone cavity by a plurality of brackets 216 In the chamber 12, and the second draft tube 22 is connected to the exhaust port 123, the airflow confluence interval 23 is a preset interval, and the airflow will correspondingly change according to the cyclone speed, the inner diameter of the draft tube and the chamber size The relative distance of the confluence interval 23.

4-3 and 5 at the same time, the first guide tube 21 is provided with at least one dust filter hole 213, the dust filter hole 213 for the second cyclone 60 to discharge the dust 40, the preferred embodiment is to The dust filter hole 213 is arranged at one end of the first guide tube 21 at the airflow confluence interval 23, and a first retaining wall 214 is formed at the end extending toward the side wall 122, and the first retaining wall 214 corresponds to The position of the dust filter hole 213 extends toward the dust collection chamber 11 with a third retaining wall 215, through which the first retaining wall 214 and the third retaining wall 215 allow the dust 40 in the second cyclone 60 to pass from the dust filter hole In 213, a collision occurs when it is thrown out by centrifugation, so that the dust 40 merges into a first cyclone 50 and then flows back to the dust collection chamber 11 to repeat the dust filtration, or through the third retaining wall 215 to extend toward the dust collection chamber 11 The guide cover 211 is used to assist the dust 40 to drop directly into the dust collection chamber 11. The inner diameter of the guide cover 211 is larger than the pipe diameter of the first guide tube 21, and the guide cover 211 and the first guide There is a gap 212 between the flow pipes 21, and the outer wall surface of the guide cover 211 is a guide arc surface, which can effectively assist the dust 40 to fall directly into the dust collection chamber 11 to avoid re-merging into the first Two cyclone 60.

Please refer to Figures 4-1 to 4-3 at the same time. When an external aspirator 30 is activated, the dust-to-be-filtered gas enters from the air inlet 121 to form the first cyclone 50 in the cyclone chamber 12 and sink down to the The dust collection chamber 11, the dust 40 in the gas to be filtered will approach the side wall 122 of the dust collection chamber 11 due to the centrifugal force of the cyclone, and will settle and accumulate toward the dust collection chamber 11 according to the gravity of the dust 40, and the second Two cyclone 60 When formed, a flowing airflow will also be formed in the dust collection chamber 11 to take out part of the dust 40. At this time, when the second cyclone 60 moves to the position of the dust filter hole 213, part of the dust 40 will be removed by the dust filter due to the centrifugal force of the cyclone. The hole 213 is thrown out to the outside of the first draft tube 21, in order to prevent the first cyclone 50 and the second cyclone 60 from interfering with each other, and effectively allow the dust 40 to merge into the first cyclone 50 and then flow back to the dust collection chamber Room 11 or let the dust 40 fall directly along the deflector 211 to the dust collection chamber 11 according to its gravity. Please refer to Fig. 4-4, through the first retaining wall 214 and the third retaining wall. The wall 215 will cause the dust 40 to collide and change the traveling direction to achieve the above repeated dust filtering purpose.

Please refer to FIGS. 4-3 to 4-5. The clean gas entering the second draft tube 22 and being discharged to the outside through the external air pump 30 will be defined as a third cyclone 70. 23. The airflow entering the second draft tube 22 will be combined by the first cyclone 50 and the second cyclone 60 into the third cyclone 70, wherein the second cyclone 60 passes through the dust filter hole of the first draft tube 21 213 After repeated dust filtering, the second cyclone 60 is already clean gas when it leaves the first guide tube 21, and the dust 40 in the first cyclone 50 is concentrated on the side wall 122 due to the cyclone centrifugal force. In other words, the gas at the center of the first cyclone 50 is also clean gas. Therefore, the third cyclone 70 that enters the second draft tube 22 from the combination of the first cyclone 50 and the second cyclone 60 is a completed dust filter. The effect of clean gas. To further improve the dust filtering effect of the present invention, please refer to Figs. 4-3. The present invention utilizes that the inner diameter of the second draft tube 22 is greater than the inner diameter of the first draft tube 21, and the first draft tube 21 The inner diameter of the dust-collecting chamber 11 is tapered from one end to the other end of the airflow confluence interval 23, and the inner diameter of the second guide tube 22 is from the end of the airflow confluence interval 23 to the exhaust The other end of the port 123 gradually increases, thereby determining the gas flow rate and the density of the second cyclone 60 and the third cyclone 70 to ensure that only clean gas flows into the third cyclone 70. In addition, in order to reduce the airflow in the central area of the first cyclone 50 still containing a small amount of the dust 40 to be mixed into the third cyclone 70, the second guide tube 22 is located at one end of the airflow confluence gap 23 toward the side wall 122 Extend a second retaining wall 221. Let the settled dust 40 be blocked by the second retaining wall 221 and only allow clean gas to merge into the third cyclone 70, and the outer periphery of the first retaining wall 214 is larger than the outer periphery of the second retaining wall 221, In addition, the outer periphery of the first retaining wall 214 and the outer periphery of the second retaining wall 221 respectively form a guiding surface, and the guiding surface will effectively assist the dust 40 to fall toward the dust collection chamber 11.

10: Dust filter

11: Dust collection chamber

12: Cyclone chamber

121: air inlet

122: sidewall

123: exhaust port

20: Diversion component

21: The first draft tube

211: Shroud

212: Spacing

213: Dust filter hole

214: The first retaining wall

215: third retaining wall

216: Bracket

22: The second draft tube

221: second retaining wall

23: Confluence spacing of airflow

30: aspirator

40: Dust

50: first cyclone

60: Second Cyclone

70: Third Cyclone

Claims (13)

A multi-cyclone dust filtering device includes: a dust collection chamber for collecting a dust in a gas to be filtered; a cyclone chamber communicating with the dust collection chamber, the cyclone chamber having a supply The air inlet through which the dust filter gas enters is connected to the air inlet and guides the dust-filtered gas to spirally flow to the dust collection chamber to form a side wall of a first cyclone, and an exhaust port; and, a guide assembly is arranged at In the cyclone chamber, the guide assembly has a first guide tube that receives the dust-to-be-filtered gas returned from the dust collection chamber and guides the dust-to-be-filtered gas to flow spirally to form a second cyclone. The draft tube is located in the same axial direction and is separated from the first draft tube at an airflow confluence distance. The first draft tube is provided with at least one dust filter hole for the second cyclone. Dust is discharged, the dust filter hole directly faces the side wall of the cyclone chamber, and the second draft tube combines the first cyclone and the second cyclone through the airflow confluence space to form a third cyclone and is discharged to the exhaust port. The multi-cyclone dust filter device according to claim 1, wherein the dust filter hole is arranged at one end of the first guide tube located at the air flow confluence interval. The multi-cyclone dust filter device according to claim 2, wherein the end portion is provided with a first retaining wall extending toward the side wall. According to claim 3, the multi-cyclone dust filter device, wherein the first retaining wall corresponds to the position of the dust filter hole and extends toward the dust collection chamber with a third retaining wall. The multi-cyclone dust filter device according to claim 4, wherein the third retaining wall extends toward the dust collection chamber and is provided with a diversion cover that assists the dust to fall to the dust collection chamber. The multi-cyclone dust filter device according to claim 1, wherein the second guide tube is located at one end of the air flow confluence interval and extends toward the side wall to extend a second retaining wall. The multi-cyclone dust filter device according to claim 6, wherein the first guide tube is located at one end of the air flow confluence interval and extends a first retaining wall toward the side wall. The multi-cyclone dust filter device according to claim 7, wherein the outer periphery of the first retaining wall is larger than the outer periphery of the second retaining wall. The multi-cyclone dust filter device according to claim 8, wherein the outer periphery of the first retaining wall and the outer periphery of the second retaining wall form a guide surface that assists the dust falling in the direction of the dust collection chamber. The multi-cyclone dust filter device according to claim 1, wherein the inner diameter of the second draft tube is larger than the inner diameter of the first draft tube. The multi-cyclone dust filter device according to claim 1 or 10, wherein the inner diameter of the first duct is tapered from one end of the dust collection chamber to the other end of the air flow converging distance. The multi-cyclone dust filter device according to claim 11, wherein the inner diameter of the second guide tube gradually increases from one end at the air flow confluence interval to the other end at the exhaust port. The multi-cyclone dust filter device according to claim 1, wherein the first draft tube is connected to the cyclone chamber by a plurality of brackets.

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