A dust removal device for reconstituted tobacco tobacco raw material pretreatment

Abstract

This invention relates to the field of dust separation technology for reconstituted tobacco raw materials, and discloses a dust removal device for the pretreatment of reconstituted tobacco raw materials, including a dust extraction pipe and a dust removal tower. The dust extraction pipe is connected to the air inlet of the dust removal tower. A dust removal mechanism is provided between the air inlet and the air outlet of the dust removal tower, and the dust removal mechanism includes a dust collection bag. A spray assembly is provided above the dust collection bag inside the dust removal tower, and the water outlet of the spray assembly is located at the center above the dust collection bag. The spray assembly includes a rotating mechanism and a spray arm. The rotating mechanism is used to drive the spray arm to rotate. The spray arm has an arc-shaped structure and a dust suction channel is provided inside. The dust suction channel runs through both ends of the spray arm and has an opening on the side facing the rotation direction of the spray arm. The inner end of the spray arm is connected to the rotating mechanism and sprays liquid into the dust suction channel through a liquid delivery pipe. It has the advantages of avoiding dust agglomeration of the filter components, preventing filter component blockage, improving spray uniformity, and improving the stability of the moving pipeline connection.

Description

Technical Field

[0001] This invention relates to the field of dust separation technology for reconstituted tobacco raw materials, and belongs to the category of filtration devices for separating dust from gas in reconstituted tobacco raw materials, specifically a dust removal device for pretreatment of reconstituted tobacco raw materials. Background Technology

[0002] In the pre-processing of reconstituted tobacco raw materials, the tobacco raw materials undergo multiple steps such as crushing, screening, and conveying, generating a large amount of dust. This dust not only pollutes the production environment, causing air pollution and affecting the health of operators, but also poses safety hazards due to dust accumulation. Furthermore, dust adhering to the surfaces of production equipment can affect its normal operation and lifespan. Therefore, dust removal devices are an indispensable and critical piece of equipment in the reconstituted tobacco pre-processing production line.

[0003] Currently, dust removal devices for reconstituted tobacco pretreatment mostly adopt a filtration-type dust removal structure, typically including a housing and filter components. They utilize channels to adsorb dust generated during production into the filter components, achieving dust separation from the air. To reduce dust content and minimize safety hazards, existing technologies often employ water spraying to adsorb suspended dust in the air within the housing, further improving dust removal efficiency.

[0004] However, the existing spray dust removal method has obvious technical defects: on the one hand, the spray water is sprayed directly onto the surface of the filter element, which causes the dust inside the filter element to be wetted and stick together, which not only blocks the filter channel of the filter element and reduces the dust removal efficiency, but also increases the difficulty of cleaning the filter element and shortens its service life; on the other hand, the existing device lacks the means to actively tap and loosen the dust accumulated inside the filter element. As the dust continues to accumulate, the clogging problem of the filter element will become more and more serious, further affecting the dust removal effect and the stability of equipment operation.

[0005] In addition, the existing spraying devices have poor spraying range and uniformity, and the spraying water cannot fully contact the suspended dust in the box, resulting in limited dust removal efficiency. At the same time, if the pipeline used to transport the spraying water needs to move synchronously with the moving parts, its connection structure design is unreasonable, which can easily lead to problems such as water leakage and jamming, affecting the normal operation of the device.

[0006] In view of the shortcomings of the existing technology, there is an urgent need for a dust removal device for the pretreatment of reconstituted tobacco leaves that can solve problems such as dust agglomeration, filter component blockage, uneven spraying and unstable connection of moving pipeline, so as to improve dust removal efficiency, ensure stable operation of equipment and reduce safety hazards. Summary of the Invention

[0007] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a dust removal device for the pretreatment of reconstituted tobacco raw materials. It has the advantages of avoiding dust agglomeration in the filter components, preventing filter component blockage, improving spray uniformity and stability of the moving pipeline connection, and solving the problems of existing dust removal devices for reconstituted tobacco pretreatment that cause dust agglomeration in the filter components, lack of dust tapping means, uneven spraying, and unreasonable connection of the moving pipeline.

[0008] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A dust removal device for pretreatment of reconstituted tobacco raw materials includes a dust extraction pipe and a dust removal tower. The dust extraction pipe is connected to the air inlet of the dust removal tower. The dust removal tower has a dust removal mechanism between the air inlet and the air outlet. The dust removal mechanism includes a dust collection bag. The dust removal tower is equipped with a spray assembly above the dust collection bag, and the water outlet of the spray assembly is located at the center position above the dust collection bag. The spray assembly includes a rotating mechanism and a spray arm. The rotating mechanism drives the spray arm to rotate. The spray arm has an arc-shaped structure and a dust suction channel inside. The dust suction channel passes through both ends of the spray arm and has an opening on the side facing the direction of rotation of the spray arm. The inner end of the spray arm is connected to the rotating mechanism and sprays liquid into the dust suction channel through an infusion pipe.

[0009] Preferably, the spray assembly further includes a lifting assembly disposed above the spray arm, the lifting assembly including a wavy circular ceiling, the ceiling having a circular sliding groove with varying heights; The inner end of the spray arm is rotatably connected to the rotating arm of the rotating mechanism, and the spray arm is provided with a sliding groove parallel to the direction of the dust suction channel. The lifting assembly also includes a boom, the lower end of which has an arc-shaped hook that slides in a groove corresponding to the spray arm, and the upper end of which has a roller that slides on the groove. When the spray arm rotates downward, the arc-shaped hook squeezes the dust suction channel and expands the opening.

[0010] Preferably, the spray arm is a spiral plate with a cross-section of vortex, wherein the number of spiral turns is 1.25 to 1.5, and the opening serves as a groove for sliding the arc-shaped hook.

[0011] Preferably, the roll plate consists of a fixed plate and an elastic plate, wherein the cross-section of the elastic plate is an arc segment from the starting point of the spiral to the lower point of the spiral, and the cross-section of the fixed plate is an arc segment from the lower point of the spiral to the end point of the spiral. The opening is located between the top of the fixed plate and the top of the elastic plate, and the suction channel is located in the cavity at the very center of the spiral.

[0012] Preferably, the thickness of the fixing plate is greater than that of the elastic plate. The fixing plate is used to fix and support the spray arm, and the elastic plate is used to realize the elastic contraction of the dust suction channel.

[0013] Preferably, an outer arc expansion plate is provided on the fixed plate at the end position of the spiral, and the edge of the outer arc expansion plate faces upward.

[0014] Preferably, an inner arc-shaped closing plate is provided on the elastic plate at the starting point of the spiral, and the edge of the inner arc-shaped closing plate faces downward.

[0015] Preferably, the spray assembly is further provided with a rotary infusion mechanism, which includes an upper plate and a lower tank rotatably connected to the bottom. The top of the upper plate is fixedly installed on a mounting plate inside the spray assembly, and the top of the upper plate is provided with a water inlet. The bottom of the lower tank is connected to multiple infusion pipes, which are flexible hoses used to accommodate the rotation of the spray arm.

[0016] Preferably, the dust removal mechanism includes a dust removal baffle plate fixedly installed inside the dust removal tower. The dust removal baffle plate is provided with multiple through holes. The upper part of the through holes is fixedly installed with the bag opening below the corresponding dust removal bag. The edge of the dust removal baffle plate is provided with an upwardly protruding reinforcing edge. The dust removal baffle plate is provided with an upwardly protruding water baffle plate at the edge of the through hole used to install the dust removal bag. The upper surface of the dust removal baffle plate is provided with a slope that is lower in the middle and higher around the edges. A drain outlet is provided at the lowest point of the upper surface of the dust removal baffle plate.

[0017] Preferably, the dust suction channel is further provided with multiple cutting plates, which are fixedly installed above the bottom of the dust suction channel, and the connection gap between the elastic plate and the fixed plate intersects with the cutting plates.

[0018] (III) Beneficial Effects Compared with the prior art, the present invention provides a dust removal device for the pretreatment of reconstituted tobacco raw materials, which has the following beneficial effects: This invention utilizes a spray arm with a built-in dust collection channel to concentrate the spray water for dust removal within the channel. First, during rotation, the spray arm not only adsorbs dust through the spray water in the dust collection channel but also prevents dust accumulation and blockage inside the dust collection bag by squeezing it during rotation. Second, it avoids spraying water directly onto the surface of the dust collection bag, which would cause the internal dust to stick together. Finally, the spray water is evenly sprayed under centrifugal force following the rotating spray arm, and the spray velocity can also generate negative pressure within the dust collection channel, accelerating the speed at which dust is drawn in from the opening.

[0019] This invention uses a wave-shaped circular ceiling with a suspension rod to swing the spray arm up and down. This strengthens the spray arm's beating effect on the dust bag and compresses the suction channel during the up-and-down movement of the suspension rod. This allows for adaptive adjustment of the opening and suction channel size, increasing the suction rate by widening the opening when spraying downwards and increasing the spray water density by narrowing the suction channel.

[0020] This invention provides two advantages: first, by setting a cutting plate at the bottom of the suction channel, the cutting plate can disperse the sprayed water in the channel, thereby increasing the adsorption efficiency; second, the cutting plate can strengthen the connection between the fixed plate and the elastic plate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the dust removal tower of the present invention.

[0023] Figure 3 This is a schematic diagram of the dust removal mechanism and spray assembly of the present invention.

[0024] Figure 4 This is a schematic diagram of the dust removal mechanism of the present invention.

[0025] Figure 5 This is a schematic diagram of the spray assembly of the present invention.

[0026] Figure 6 This is a schematic diagram of the spray assembly of the present invention from another angle.

[0027] Figure 7 This is a schematic diagram of the rotating infusion mechanism of the present invention.

[0028] Figure 8 This is a schematic diagram of the rotating mechanism of the present invention.

[0029] Figure 9 This is a schematic diagram of the structure of the lifting assembly and the spray arm of the present invention.

[0030] Figure 10 This is a schematic diagram of the lifting assembly of the present invention.

[0031] Figure 11 This is a schematic diagram of the structure of the lifting rod of the present invention.

[0032] Figure 12 This is a schematic diagram of the spray arm of the present invention.

[0033] Figure 13 This is a schematic diagram of the spiral of the spray arm of the present invention.

[0034] In the diagram: 1. Dust removal tower; 11. Air inlet; 12. Air outlet; 13. Dust removal mechanism; 14. Spray assembly; 141. Mounting plate; 131. Dust removal baffle; 132. Dust bag; 133. Fixing ring; 134. Cable; 1311. Drain outlet; 1312. Water baffle; 2. Dust extraction pipe; 3. Spray arm; 301. Opening; 302. Dust suction channel; 31. Fixing plate; 32. Elastic plate; 311. Outer arc expansion plate; 321. Inner arc contraction plate. Plate; a1, starting point of the spiral; a2, ending point of the spiral; a3, lower point of the spiral; b1, 135-degree ray; b2, 45-degree ray; 33, cutting plate; 4, rotating mechanism; 41, rotating arm; 5, rotating infusion mechanism; 51, upper plate; 511, inlet; 52, lower tank; 521, infusion tube; 6, lifting assembly; 61, suspended ceiling; 62, supporting top; 63, hanging rod; 611, chute; 631, arc hook; 632, roller. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] Example 1: This embodiment provides a safety power metering box that is protected against electric shock, and has the following technical features.

[0040] Existing dust removal methods require using channels to adsorb dust into the dust collection bag 132 of the dust collection tower 1. Due to the high dust content inside the dust collection tower 1, which poses a safety hazard, water spraying is used to adsorb dust from the internal air. However, the water spraying will wet the dust collection bag 132, causing the dust inside to clump together. Furthermore, there is a lack of means to beat the dust accumulated inside the dust collection bag 132.

[0041] like Figure 1 - Figure 13 As shown, a dust removal device for pretreatment of reconstituted tobacco raw materials includes a dust extraction pipe 2 and a dust removal tower 1. The dust extraction pipe 2 is connected to the air inlet 11 of the dust removal tower 1. A dust removal mechanism 13 is provided between the air inlet 11 and the air outlet 12 of the dust removal tower 1. The dust removal mechanism 13 includes a dust removal bag 132. A spray assembly 14 is provided above the dust removal bag 132 inside the dust removal tower 1. The water outlet of the spray assembly 14 is located at the center position above the dust removal bag 132. The spray assembly 14 includes a rotating mechanism 4 and a spiral lower point 3. The rotating mechanism 4 is used to drive the spiral lower point 3 to rotate. The spiral lower point 3 has an arc-shaped structure and a dust suction channel 302 is provided inside. The dust suction channel 302 passes through both ends of the spiral lower point 3 and has an opening 301 on the side facing the rotation direction of the spiral lower point 3. The inner end of the spiral lower point 3 is connected to the rotating mechanism 4 and liquid is sprayed into the dust suction channel 302 through a liquid infusion pipe 521. This invention, by setting a spiral lower point 3 at the bottom of the built-in dust collection channel 302, concentrates the spray water used for dust removal within the dust collection channel 302. First, during the rotation of the spiral lower point 3, it can both adsorb dust through the spray water in the dust collection channel 302 and prevent dust accumulation and blockage inside the dust collection bag 132 by squeezing the dust collection bag 132 during the rotation of the spiral lower point 3. Second, it avoids the spray water from being sprayed directly onto the surface of the dust collection bag 132, which would cause the internal dust to stick together. Finally, the spray water is evenly sprayed under centrifugal force following the rotating spiral lower point 3, and the spray flow rate can also generate negative pressure in the dust collection channel 302, accelerating the speed at which dust is sucked in from the opening.

[0042] like Figure 6 - Figure 8 As shown, further configured, since the infusion tube 521 needs to rotate with the lower position 3 of the spiral, a rotating infusion mechanism 5 is also provided in the spray assembly 14. The rotating infusion mechanism 5 includes an upper plate 51 and a lower tank 52 rotatably connected to the bottom. The top of the upper plate 51 is fixedly installed on the mounting plate 141 in the spray assembly 14. The top of the upper plate 51 is provided with a water inlet 511. The bottom of the lower tank 52 is connected to multiple infusion tubes 521.

[0043] Furthermore, a swing rod is fixedly installed on the lower bucket 52 to connect to the rotating mechanism 4, thereby driving the infusion tube 521 to rotate synchronously with the lower end point 3 of the spiral tube.

[0044] like Figure 4 As shown, to further improve dust removal efficiency, the dust removal mechanism 13 is equipped with multiple dust bags 132. The dust removal mechanism 13 includes a dust removal baffle 131 fixedly installed inside the dust removal tower 1. The dust removal baffle 131 has multiple through holes, and the bag openings above the through holes are fixedly installed below the dust bags 132. Specifically, to facilitate the downward tapping of the spiral line 3 on the dust bags 132 and ensure uniform force, the multiple dust bags 132 are evenly distributed circumferentially on the dust removal baffle 131.

[0045] like Figure 4 As shown, the dust collection bag 132 is further provided with a fixing ring 133 fixedly installed on the outer side near the upper position. Multiple cables 134 are connected to the fixing ring 133. The cables 134 are used to connect two adjacent fixing rings 133 together and to connect the fixing rings 133 to the inner wall of the dust collection tower 1.

[0046] like Figure 4 As shown, further configured, since the lower point 3 of the spiral is sprayed above the dust removal mechanism 13, water will accumulate on the dust removal baffle 131. The water immersion will cause the dust removal bag 132 to be damaged and the dust inside the dust removal bag 132 to clump together. Therefore, the edge of the dust removal baffle 131 is provided with an upwardly protruding reinforcing edge. The edge of the dust removal baffle 131 for installing the dust removal bag 132 is provided with an upwardly protruding baffle 1312. The upper surface of the dust removal baffle 131 is set as a slope that is low in the middle and high around the edges. The lowest point of the upper surface of the dust removal baffle 131 is provided with a drain outlet 1311. The baffle 1312 can both strengthen the fixation of the dust removal bag 132 and prevent water from entering the dust removal bag 132.

[0047] like Figure 8 As shown, the rotating mechanism 4 is further configured to include a fixed base, a rotating base, and a rotating motor. The fixed base and the rotating motor are fixedly mounted on the mounting plate 141 of the spray assembly 14. The rotating base is rotatably connected to the fixed base, and the output shaft of the rotating motor is drive-connected to the rotating base. The rotating motor drives the rotating base to rotate, and a rotating arm 41 is fixedly mounted on the rotating base. Specifically, the drive connection between the output shaft of the rotating motor and the rotating base can be any one of the following: worm gear driving worm wheel, cylindrical gear driving cylindrical gear, helical gear driving helical gear, belt drive, or sprocket drive.

[0048] Furthermore, the dust removal tower 1 or the dust extraction pipe 2 is equipped with an air extraction device, which can be selected from at least one of the following methods: the dust extraction pipe 2 is equipped with a fan to draw the dust generated by the reconstituted tobacco pretreatment device at the inlet of the dust extraction pipe 2 into the dust removal tower 1; the dust removal tower 1 is equipped with a blower between the spray assembly 14 and the air outlet 12 to generate negative pressure in the dust removal tower 1, thereby generating suction in the dust extraction pipe 2.

[0049] Example 2: This embodiment provides a dust removal device for the pretreatment of reconstituted tobacco raw materials, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0050] like Figure 1 - Figure 13 As shown, since the beating effect on the dust bag 132 during the rotation of the lower spiral point 3 in this invention is not obvious, and there is a lack of means to adaptively adjust the suction rate, the spray assembly 14 also includes a lifting assembly 6 disposed above the lower spiral point 3. The lifting assembly 6 includes a wavy annular ceiling 61, and a circular groove 611 with varying heights is provided inside the ceiling 61. The inner end of the lower spiral point 3 is rotatably connected to the rotating arm 41 of the rotating mechanism 4. A groove parallel to the direction of the suction channel 302 is provided inside the lower spiral point 3. The lifting assembly 6 also includes a rod 63. The arc hook 631 at the lower end of the rod 63 slides in the groove corresponding to the lower spiral point 3, and the roller 632 at the upper end of the rod 63 slides on the groove 611. When the lower spiral point 3 rotates downward, the arc hook 631 squeezes the suction channel 302 and expands the opening 301. This invention uses a wavy circular ceiling 61 and a suspension rod 63 to make the lower spiral point 3 swing up and down. This has two advantages: first, it can enhance the beating effect of the lower spiral point 3 on the dust bag 132; second, it can use the suspension rod 63 to squeeze the suction channel 302 during the up and down movement, thereby adaptively adjusting the size of the opening 301 and the suction channel 302. This allows for increasing the suction rate by increasing the opening when beating downwards and decreasing the suction channel 302 to increase the spray water density.

[0051] like Figure 9 As shown, the lifting assembly 6 is further configured to include a support top 62 fixedly mounted on the mounting plate 141 and a ceiling 61 fixedly mounted on the support top 62.

[0052] like Figure 8 As shown, the infusion tube 521 is further configured as a flexible tube to accommodate the rotation of the lower position 3 of the spiral.

[0053] like Figure 12 - Figure 13As shown, in order to achieve the effect of squeezing the dust suction channel 302 and expanding the opening when the lower part of the spiral point 3 rotates downward, the lower part of the spiral point 3 is a spiral plate with a cross-section of vortex spiral, wherein the number of spiral turns is 1.25 to 1.5 turns.

[0054] like Figure 13 As shown, specifically, the spiral has 1.25 turns. At this time, the starting point a1 of the spiral is located on the 135-degree ray b1, and the ending point a2 of the spiral is located on the 45-degree ray b2. With the center point of the spiral as the origin, a planar coordinate system is established, with the x-axis parallel to the horizontal plane. The 135-degree ray b1 is a ray located above the x-axis and making an angle of 135 degrees with the x-axis, with its starting point at the origin; the 45-degree ray b2 is a ray located above the x-axis and making an angle of 45 degrees with the x-axis, with its starting point at the origin.

[0055] like Figure 12 - Figure 13 As shown, the roll plate is further configured to consist of a fixed plate 31 and an elastic plate 32. The cross-section of the elastic plate 32 is an arc segment from the starting point a1 of the spiral to the lower point a3 of the spiral, where the lower point a3 is a point on the spiral located below the origin. The cross-section of the fixed plate 31 is an arc segment from the lower point a3 of the spiral to the ending point a2 of the spiral. The opening is the part located between the top of the fixed plate 31 and the top of the elastic plate 32. The slide is set in the opening, and the dust suction channel is located in the cavity at the very center of the spiral.

[0056] like Figure 13 As shown, specifically, the thickness of the fixed plate 31 is greater than that of the elastic plate 32. The fixed plate 31 is used to fix and support the lower position 3 of the spiral, and the elastic plate 32 is used to realize the elastic contraction of the dust suction channel 302.

[0057] like Figure 13 As shown, specifically, the lower spiral point a3 is located directly below and near the origin.

[0058] It should be noted that when the boom 63 moves downward, it causes the lower point 3 of the spiral to rotate downward, thereby squeezing the area directly above the elastic plate 32. This expands the opening and narrows the suction channel 302 during downward pounding. Expanding the opening accelerates the speed at which air enters the suction channel 302, while narrowing the suction channel 302 increases the density of the sprayed water, thus adapting to situations where there is a large amount of dust during downward pounding. Conversely, when the boom 63 moves upward, it causes the lower point 3 of the spiral to rotate upward, at which point it loses the squeezing of the elastic plate 32. This expands the suction channel 302, which accelerates the discharge of the sprayed water containing dust.

[0059] like Figure 13As shown, in order to increase the dust collection rate, an outer arc expansion plate 311 is provided on the fixed plate 31 at the end position of the spiral, with the edge of the outer arc expansion plate 311 facing upward.

[0060] like Figure 13 As shown, in order to ensure that the airflow and the spray water are in full contact, an inner arc retracting plate 321 is provided on the elastic plate 32 at the position of the spiral starting point a1, with the edge of the inner arc retracting plate 321 facing downward.

[0061] Example 3: This embodiment provides a dust removal device for the pretreatment of reconstituted tobacco raw materials, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0062] like Figure 13 As shown, the fixed plate 31 and the elastic plate 32 are connected by rotational welding in this invention. However, the elastic plate 32 is frequently subjected to pressure, which can lead to breakage of the connection between the elastic plate 32 and the fixed plate 31. Furthermore, the sprayed water in the suction channel 302 is not sufficiently dispersed, resulting in poor adsorption. Therefore, multiple cutting plates 33 are also provided inside the suction channel 302. The cutting plates 33 are fixedly installed above the bottom of the suction channel 302, and the connection gap between the elastic plate 32 and the fixed plate 31 intersects with the cutting plates 33. By providing cutting plates 33 at the bottom of the suction channel 302, this invention serves two purposes: firstly, it disperses the sprayed water in the channel, thereby increasing adsorption efficiency; secondly, it strengthens the connection between the fixed plate 31 and the elastic plate 32.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dust removal device for pretreatment of reconstituted tobacco raw materials, comprising a dust extraction pipe (2) and a dust removal tower (1), wherein the dust extraction pipe (2) is connected to the air inlet (11) of the dust removal tower (1), and the dust removal tower (1) is provided with a dust removal mechanism (13) between the air inlet (11) and the air outlet (12), wherein the dust removal mechanism (13) includes a dust removal bag (132), characterized in that: The dust removal tower (1) has a spray assembly (14) installed above the dust removal bag (132), and the water outlet of the spray assembly (14) is located at the center above the dust removal bag (132); The spray assembly (14) includes a rotating mechanism (4) and a spray arm (3). The rotating mechanism (4) is used to drive the spray arm (3) to rotate. The spray arm (3) has an arc-shaped structure and a dust suction channel (302) is provided inside. The dust suction channel (302) passes through both ends of the spray arm (3) and has an opening (301) on one side facing the rotation direction of the spray arm (3). The inner end of the spray arm (3) is connected to the rotating mechanism (4) and sprays liquid into the dust suction channel (302) through the infusion pipe (521).

2. The dust removal device for pretreatment of reconstituted tobacco raw materials according to claim 1, characterized in that, The spray assembly (14) also includes a lifting assembly (6) disposed above the spray arm (3). The lifting assembly (6) includes a wavy ring ceiling (61) with a circular groove (611) inside the ceiling (61). The inner end of the spray arm (3) is rotatably connected to the rotating arm (41) of the rotating mechanism (4), and the spray arm (3) is provided with a sliding groove parallel to the direction of the dust suction channel (302). The lifting assembly (6) also includes a boom (63), the arc hook (631) at the lower end of the boom (63) slides in the groove of the corresponding spray arm (3), and the roller (632) at the upper end of the boom (63) slides on the groove (611). When the spray arm (3) rotates downward, the arc hook (631) squeezes the dust suction channel (302) and expands the opening (301).

3. The dust removal device for pretreatment of reconstituted tobacco raw materials according to claim 2, characterized in that, The spray arm (3) is a spiral plate with a cross-section of vortex, wherein the number of spiral turns is 1.25 to 1.5 turns, and the opening (301) serves as a groove for sliding the arc hook (631).

4. A dust removal device for pretreatment of reconstituted tobacco raw materials according to claim 3, characterized in that, The roll plate is composed of a fixed plate (31) and an elastic plate (32), wherein the cross section of the elastic plate (32) is an arc segment from the starting point (a1) of the spiral to the lower point (a3) ​​of the spiral, and the cross section of the fixed plate (31) is an arc segment from the lower point (a3) ​​of the spiral to the ending point (a2) of the spiral. The opening (301) is located between the top of the fixed plate (31) and the top of the elastic plate (32), and the suction channel (302) is located in the cavity at the center of the spiral.

5. A dust removal device for pretreatment of reconstituted tobacco raw materials according to claim 4, characterized in that, The thickness of the fixed plate (31) is greater than that of the elastic plate (32). The fixed plate (31) is used to fix and support the spray arm (3), and the elastic plate (32) is used to realize the elastic contraction of the dust suction channel (302).

6. A dust removal device for pretreatment of reconstituted tobacco raw materials according to claim 4, characterized in that, An outer arc expansion plate (311) is provided on the fixed plate (31) at the end position of the spiral, and the edge of the outer arc expansion plate (311) faces upward.

7. A dust removal device for pretreatment of reconstituted tobacco raw materials according to claim 4, characterized in that, An inner arc retractor plate (321) is provided on the elastic plate (32) at the starting point of the spiral, and the edge of the inner arc retractor plate (321) faces downward.

8. A dust removal device for pretreatment of reconstituted tobacco raw materials according to claim 4, characterized in that, The spray assembly (14) is also provided with a rotary infusion mechanism (5). The rotary infusion mechanism (5) includes an upper plate (51) and a lower tank (52) rotatably connected to the bottom. The top of the upper plate (51) is fixedly installed on the mounting plate (141) inside the spray assembly (14). The top of the upper plate (51) is provided with a water inlet (511). The bottom of the lower tank (52) is connected to multiple infusion pipes (521). The infusion pipes (521) are flexible hoses used to adapt to the rotation of the spray arm (3).

9. A dust removal device for pretreatment of reconstituted tobacco raw materials according to claim 4, characterized in that, The dust removal mechanism (13) includes a dust removal baffle (131) fixedly installed inside the dust removal tower (1). The dust removal baffle (131) is provided with multiple through holes. The upper part of the through holes is fixedly installed with the bag opening below the corresponding dust removal bag (132). The edge of the dust removal baffle (131) is provided with an upwardly protruding reinforcing edge. The dust removal baffle (131) is provided with an upwardly protruding baffle (1312) at the edge of the through hole used to install the dust removal bag (132). The upper surface of the dust removal baffle (131) is provided with a slope that is low in the middle and high around the edges. The lowest point of the upper surface of the dust removal baffle (131) is provided with a drain outlet (1311).

10. A dust removal device for pretreatment of reconstituted tobacco raw materials according to claim 4, characterized in that, The dust extraction channel (302) is also provided with a plurality of cutting plates (33), which are fixedly installed above the bottom of the dust extraction channel (302). The connection gap between the elastic plate (32) and the fixed plate (31) intersects with the cutting plate (33).

Images