Dust removal process based on up-down misalignment and segmented suction filtration cooperative air pressure cotton box

Abstract

The application discloses a dust removal process based on up-down misplacement and segmented suction filtration collaborative air pressure cotton box, which comprises the following steps: S1, feeding; S2, dust suction filtration. The application is based on up-down segmentation and misplacement cooperation of suction filtration on one hand, not only covers the suction filtration area with the whole feeding section and the top of the cotton inlet channel, but also drags and scatters the fibers due to the change of suction filtration angle, reduces the probability of fiber clumping and knotting, raises the dust, improves the dust filtration efficiency and quality, greatly reduces the screen hanging rate of the filter screen, reduces the cleaning and replacement frequency, and guarantees the continuous and efficient operation of the production line. Based on the shunting of the upper filtration bin, the airflow of the lower filtration bin is not disturbed, and the suction filtration of the lower filtration bin is assisted, so that the dust removal quality is improved. In addition, under the suction filtration of the same negative pressure source, the negative pressures of the suction filtration cavity and the lower filtration bin are different and will not interfere with each other, the secondary dust raising and the false capture caused by improper control of the negative pressure adsorption force are avoided, and the dust removal efficiency and the raw material yield are greatly improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of negative pressure dust removal, and particularly relates to a dust removal process of an air pressure cotton box based on up-down misplacement and segmented suction-filtering cooperation. BACKGROUND

[0002] The air pressure cotton box is a key equipment in textile machinery (especially a carding machine and a non-woven fabric production line), which is mainly used for uniform conveying and pretreatment of fibers, and a core function of which is to form a stable and uniform cotton layer from the opened fibers through air pressure control and a vibration mechanism, so as to provide high-quality raw materials for a subsequent carding process.

[0003] However, a large amount of dust is contained in the fiber raw materials, and dust treatment is needed, otherwise the existence of the dust not only has an impact on the equipment operation (wear, blockage, etc.), but also has an impact on the product quality (uneven web formation, etc.), and also has a negative impact on the production environment and safety, so a negative pressure dust removal is arranged at a feeding section of an inlet cotton channel, in which a filter screen is formed based on the inner wall of the inlet cotton channel, and then dust suspended in the feeding section is adsorbed and filtered in through negative pressure, and the fibers fall based on the self-weight, so as to achieve the negative pressure dust removal.

[0004] Although the above dust removal can implement the relative separation of the dust and the fibers, the following technical defects exist:

[0005] 1) Since the dust (such as cotton dust, short fibers and impurity particles) in the feeding section has a small particle size and a large quantity, a dense dust layer is formed on the surface of the filter screen after long-term operation, which leads to a decrease in the porosity of the filter screen and an increase in the air permeation resistance, not only weakening the negative pressure dust removal efficiency (manifested as the attenuation of the air volume of the dust removal port and the increase in the dust escape amount), but also needing frequent shutdown for filter screen cleaning (such as manual beating or high-pressure air backwashing), and even needing to replace the filter material, which seriously affects the continuous operation efficiency of the production line;

[0006] 2) The fiber flow in the inlet cotton channel is prone to turbulence or segregation phenomenon (such as fiber group accumulation leading to a decrease in the cross section of the channel), which may destroy the uniformity of the negative pressure air flow: on the one hand, the local negative pressure is insufficient due to the shielding effect of the fiber dense area, and the dust cannot be effectively adsorbed; on the other hand, the dust attached to the filter screen may be lifted again due to air flow scouring in the dead angle or high flow rate area of the channel, causing a cycle of "dust removal-dust lifting", which directly affects the dust removal efficiency and quality;

[0007] 3) The formed negative pressure adsorption area is only arranged at the feeding section, and the self-weight of the fibers (especially short fibers or light fibers) is small, if the negative pressure adsorption force is not properly controlled (such as local negative pressure being too high), the fibers may be adsorbed by the filter screen together with the dust, leading to the mis-capture of the effective fibers and reducing the yield of the yarn raw materials; at the same time, the fine component dust which is not completely separated may still be mixed in the fibers, affecting the quality stability of the subsequent carding, spinning and other processes;

[0008] 4) For pneumatic conveying of cotton, the fibers are driven by the airflow, so it is easy to form fiber clusters or knots, and in the dust removal process, this clustering or knotting not only affects the removal of dust, but also affects the quality of the carding web. SUMMARY

[0009] The purpose of the present application is to overcome the shortcomings of the prior art and provide a new dust removal process based on an upper-lower staggered and segmented suction filtration collaborative pneumatic cotton box.

[0010] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is: a dust removal process based on an upper-lower staggered and segmented suction filtration collaborative pneumatic cotton box, which employs a dust removal device including upper and lower dust removal units based on an upper-lower extending cotton inlet channel and arranged on the upper and lower sections of the corresponding feeding section, wherein the upper and lower dust removal units have upper and lower filter bins arranged on the opposite sides of the cotton inlet channel and staggered vertically, and each upper filter bin has a suction filtration cavity and a shunt cavity, wherein each upper filter bin is in communication with two lower filter bins from the shunt cavity, and the sidewalls of the cotton inlet channel corresponding to the upper and lower filter bins form filter screens for filtering dust, and the upper and lower dust removal units share a negative pressure source and a negative pressure pipeline, and the dust removal process includes the following steps:

[0011] S1, feeding

[0012] The cotton material is fed from the feeding channel into the feeding section and transmitted downward along the cotton inlet channel, wherein based on the self-weight, part of the fibers falls, and part of the fibers and dust are suspended in the feeding section;

[0013] S2, dust suction filtration

[0014] Based on the negative pressure, the lower filter bin and the upper filter bin form a negative pressure synchronously, the cotton material suspended in the feeding section passes through the upper and lower section suction filtration area, and the cotton material is negatively adsorbed in different positions and directions, passes through the filter screen and enters the upper filter bin, and the airflow shunted into the two lower filter bins is the same as the adsorption direction formed by the lower filter bin, and at the same time, based on the suction filtration formed by the filter screen of the lower filter bin, the fibers freely fall in the self-weight, downward pulling and floating, and the dust bin collects based on the negative pressure pipeline.

[0015] Preferably, in step S1, the feeding channel is horizontally arranged, the cotton inlet channel is vertically arranged, and the suction filtration cavities are symmetrically arranged on the opposite sides of the feeding channel. Based on the horizontal feeding of the cotton material, the cotton material is relatively scattered in the feeding section, avoiding the entanglement between the fibers to affect the suction filtration of the dust.

[0016] In some specific embodiments, the upper and lower filter bins are vertically arranged based on the suction filtration direction formed by the filter screen. In this way, the adsorption swing direction formed is completely different, which is more conducive to the dispersion of the fibers, and at the same time, the lower section suction filtration can relatively pull down the fibers of the upper section, thereby reducing the probability of web hanging.

[0017] According to a specific implementation and preferred aspect of the present application, the shunt cavities are communicated from the top, and in step S2, the airflow is drawn out of the filter bins through the negative pressure pipeline based on the sinusoidal or cosine periodic variation of the negative pressure difference between the two lower filter bins. Based on the periodic variation of the negative pressure, the corresponding section of fibers is relatively shaken and swung, which not only facilitates the dust to be raised and filtered, but also further reduces the fiber meshing rate, and is more conducive to the relative separation of short fibers and dust, thereby further increasing the dust removal quality and efficiency.

[0018] Preferably, an airflow passage module is arranged between the lower filter bin and the negative pressure pipeline, and a negative pressure regulator for changing the airflow direction and flow rate is arranged in the airflow passage module, wherein the negative pressure regulator is based on the intercommunication formed by the shunt cavities to achieve the floating and reciprocal adjustment of the negative pressure difference. Based on the arrangement of the airflow passage module, the internal airflow of the lower filter bin is prevented from being chaotic due to backflow.

[0019] In some specific implementations, the airflow passage module extends along the length direction of the lower filter bin, and the lower filter bin is communicated with the negative pressure pipeline from the middle part to the bottom. Based on the butt joint communication of the bottom and the middle part, the airflow is facilitated to flow and transfer, and is relatively uniform.

[0020] Further, the negative pressure regulator is a rotating impeller installed in the airflow passage module, and includes a shaft, blades, and a power element, wherein the shaft extends along the length direction of the airflow passage module, the blades are in strip shape, and are uniformly distributed around the shaft.

[0021] According to another specific implementation and preferred aspect of the present application, in step S2, based on the variation of the rotational speed difference of the rotating impellers arranged in the two airflow passage modules respectively, and in combination with the intercommunication formed by the shunt cavities, the negative pressure of the two lower filter bins is changed based on the floating variation and is periodically changed. At different rotational speeds of the impellers, the airflow formed is not equal, thereby forming a flow difference (that is, a negative pressure difference), so that the frequency of fiber shaking caused by suction filtration can meet the removal needs.

[0022] Preferably, the negative pressure pipeline includes a first branch and a second branch respectively communicated with the lower filter bins, a third branch and a fourth branch respectively communicated with the aligned end portions of the first branch and the second branch, a fifth branch for communicating the same side end portions of the third branch and the fourth branch, and a tee arranged on the fifth branch, wherein the unconnected end portion of the tee is the connection end of the negative pressure source, and the other end of the third branch and the fourth branch is closed. Based on the relatively parallel branches and the confluence of the relatively series connection and the manifold, the two lower filter bins are simultaneously implemented with the negative pressure of the same negative pressure source, and the meshing defects caused by the excessive instantaneous suction force are eliminated.

[0023] Further, the third branch and the fourth branch are also provided with self-rotating spiral guide vanes, and in step S2, the gas extraction is assisted by the spiral guide vanes with the same guide direction to pressurize and accelerate the gas flow to the fifth branch. By the spiral guide, the gas flowability is increased, so that the gas and dust are quickly extracted, the dust residual rate in the upper and lower filter bins is reduced, and the circulating pollution probability of "dust removal-dust raising" is also reduced.

[0024] In addition, a flow discharge channel is formed at the bottom of the suction filter cavity, a flow distribution plate and a sealing plate are formed on the sidewall of the inlet channel corresponding to the flow discharge channel, and the sealing plate seals the area formed by the flow distribution plate and the inlet channel to form a flow distribution cavity. Not only the flow distribution effect is good, but also a window groove is formed between the flow distribution cavity, the sidewall of the inlet channel and the lower filter bin, and a transparent window is arranged on the sidewall of the inlet channel corresponding to the window groove. Not only the appearance is beautiful, but also the internal fiber falling condition can be observed at any time.

[0025] Preferably, the flow distribution cavities formed by the flow distribution cavities are equal in size, and the flow distribution plate is a right-angle plate or an acute-angle plate. In step S2, the gas flow extracted from the suction filter cavity is evenly distributed to the two lower filter bins based on the flow distribution cavities. Not only the flow distribution is balanced, but also the pressure change of the lower filter bin can effectively reduce the influence on the pressure balance of the suction filter cavity (note: in the pressure change of the lower filter bin, the pressure in the suction filter cavity is constant).

[0026] Thanks to the above technical solutions, the present application has the following advantages compared with the prior art:

[0027] In the existing negative pressure dust removal of air pressure cotton box, due to the small particle size and large quantity of dust (such as cotton dust, short fibers and impurity particles) in the feeding section, a dense dust layer is formed on the surface of the filter screen after long-term operation, resulting in a decrease in filter screen porosity and an increase in air permeability resistance, which not only weakens the negative pressure dust removal efficiency (manifested as the attenuation of dust removal port air volume and the increase of dust escape amount), but also requires frequent shutdown for filter screen cleaning (such as manual beating or high-pressure air backwashing), and even requires replacement of filter material, seriously affecting the continuous operation efficiency of the production line; at the same time, the turbulent flow or segregation phenomenon (such as fiber cluster accumulation leading to the narrowing of the channel cross section) is easy to occur in the fiber flow process in the cotton inlet channel, which may destroy the uniformity of the negative pressure airflow: on the one hand, the local negative pressure is insufficient due to the shielding effect of the dense fiber area, and the dust cannot be effectively adsorbed; on the other hand, the dead angle or high flow area of the channel may cause the dust attached to the filter screen to be lifted again due to airflow scouring, causing a cycle of "dust removal-dust lifting", directly affecting the dust removal efficiency and quality; in addition, the negative pressure adsorption area formed is only arranged in the feeding section, and the self-weight of the fiber (especially short fiber or light fiber) is small, if the negative pressure adsorption force is not properly controlled (such as local high negative pressure), the effective fiber may be captured together with the dust, resulting in a decrease in the yield of the yarn raw material; at the same time, the fine component dust that is not completely separated may still be mixed in the fiber, affecting the quality stability of the subsequent carding, spinning and other processes; finally, for air pressure cotton conveying, the fiber moves forward under the action of airflow, therefore, it is easy to occur that the fiber is clustered or knotted, and in the dust removal process, this clustering or knotting not only affects the removal of dust, but also affects the quality of the carded web and other problems, and the present application ingeniously solves the various existing problems based on the overall design of the dust removal process of the air pressure cotton box with upper and lower staggered and segmented suction filtration cooperation, after adopting the dust removal process, firstly, the cotton material is sent from the feeding channel to the feeding section and transmitted downward along the cotton inlet channel, based on the self-weight, part of the fiber falls, and part of the fiber and dust is suspended in the feeding section; secondly, based on the negative pressure, the lower filter bin and the upper filter bin form a negative pressure at the same time, the cotton material suspended in the feeding section passes through the upper and lower suction filtration zones, and the airflow passing through the filter screen and entering the upper filter bin is divided into two lower filter bins under the action of negative pressure adsorption at different positions and directions of the cotton material, and the airflow divided into the lower filter bin is the same as the adsorption direction formed by the filter screen of the lower filter bin, at the same time, the suction filtration is formed based on the filter screen of the lower filter bin, so that the fiber freely falls in the self-weight, downward pulling and floating, thereby completing the removal of dust, therefore, the present application, on the one hand, based on the upper and lower segmentation and staggered cooperation of suction filtration, not only covers the suction filtration zone throughout the feeding section and the top of the cotton inlet channel, but also reduces the probability of fiber clustering and knotting by pulling and scattering the fiber due to the change of suction filtration angle, raises the dust, improves the dust filtration efficiency and quality, greatly reduces the filter screen hanging rate, reduces the cleaning and replacement frequency, and ensures the continuous and efficient operation of the production line.Another aspect is based on the shunt of the upper filter bin, and will not cause the airflow turbulence of the lower filter bin, and can also assist the suction filtration of the lower filter bin to improve the dust removal quality. In addition, under the suction filtration of the same negative pressure source, the negative pressure between the suction filtration cavity and the lower filter bin is different and will not interfere, avoiding the secondary dust raising and false capture caused by improper control of the negative pressure adsorption force, thereby greatly improving the dust removal efficiency and raw material yield. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 Structure diagram of the negative pressure dust removal system of the air pressure cotton box of the embodiment;

[0029] Figure 2 Structure exploded diagram of Figure 1 ;

[0030] Figure 3 Further structure exploded diagram of Figure 2 ;

[0031] Figure 4 Front view diagram of Figure 1 ;

[0032] Figure 5 Left view diagram of Figure 4 ;

[0033] Figure 6 A-A cross-sectional view diagram of Figure 4 ;

[0034] Figure 7 Structure diagram of the negative pressure pipeline of Figure 1 ;

[0035] Figure 8 Top view diagram of Figure 7 ;

[0036] Figure 9 B-B cross-sectional view diagram of Figure 8 ;

[0037] Figure 10 Structure enlarged diagram of I in Figure 9 ;

[0038] Wherein: 1, upper dust removal unit; 10, upper filter bin; 100, suction filtration cavity; q, flow discharge channel; 101, shunt cavity; b1, shunt plate; b2, sealing plate; 2, lower dust removal unit; 20, lower filter bin; 3, negative pressure pipeline; 31, first branch; 32, second branch; 33, third branch; 34, fourth branch; 35, fifth branch; 36, three-way pipe; 37, spiral guide vane; 4, airflow channel module; 5, negative pressure regulator; 50, wheel shaft; 51, vane; M, cotton inlet channel; S, feeding channel; W, filter screen; X, window groove; C, transparent window. DETAILED DESCRIPTION

[0039] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the scope of the present application, and it is understood that similar improvements can be made by those skilled in the art in light of the foregoing description. Therefore, the present application is not limited to the following disclosed specific embodiments.

[0040] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0041] In addition, the terms "first", "second", "third" and the like are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implying a specific number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0042] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In the present application, unless specifically defined and limited otherwise, a first feature "on" or "under" a second feature can be directly in contact with the second feature, or indirectly in contact with the second feature through an intermediate medium. Moreover, a first feature "over", "above" and "on top of" a second feature can be directly above or obliquely above the second feature, or simply means that the first feature is higher in horizontal level than the second feature. A first feature "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is lower in horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be an intermediate element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

[0044] As shown in Figures 1 to 10 The dust removal process based on the cooperation of the up-down misalignment and the segmented suction filtration of the air pressure cotton box of the present embodiment adopts a dust removal device including an upper dust removal unit 1 and a lower dust removal unit 2 based on the up-down extending inlet channel M layout in the feeding section.

[0045] Specifically, the horizontal cross section (cross section) of the inlet channel M is square, and the inlet channel M is vertically arranged up and down, the feeding channel S is horizontally arranged on one side of the top of the inlet channel M, and the cotton material is sent from the feeding channel S into the feeding section and transmitted downward along the inlet channel, wherein based on the self-weight, part of the fibers fall, and part of the fibers and dust are suspended in the feeding section. In short, based on the horizontal feeding of the cotton material, the cotton material is relatively scattered in the feeding section, avoiding the entanglement between the fibers to affect the suction filtration of the dust.

[0046] The upper dust removal unit 1 includes an upper filter bin 10 arranged symmetrically about the feeding channel S in the upper section. The lower dust removal unit 2 includes two lower filter bins 20 arranged in a 90° misalignment with the upper filter bin 10 in the lower section. Each upper filter bin 10 has a suction filtration cavity 100 and a shunt cavity 101, wherein each upper filter bin 10 is in communication with the two lower filter bins 20 from the shunt cavity 101, and the sidewall of the inlet channel M corresponding to the upper filter bin 10 and the lower filter bin 20 forms a filter screen W for filtering dust, and the upper dust removal unit 1 and the lower dust removal unit 2 share a negative pressure source and a negative pressure pipeline 3.

[0047] In some embodiments, the bottom of the suction filter cavity 100 forms a discharge channel q, and a baffle b1 and a sealing plate b2 are formed on the sidewall of the inlet channel M corresponding to the discharge channel q, wherein the sealing plate b2 seals the area formed by the baffle b1 and the inlet channel M to form a discharge cavity 101. Not only is the discharge effect good, but a window groove X is also formed between the discharge cavity, the sidewall of the inlet channel, and the lower filter bin, and a transparent window C is provided on the sidewall of the inlet channel corresponding to the window groove X, which not only has a beautiful appearance, but also allows the internal fiber to be observed at any time. In this example, the discharge cavities formed by the discharge cavities 101 are equal in size, and the baffle b1 is a right-angle plate or an acute-angle plate, and the airflow sucked by the suction filter cavity 100 is evenly divided into two lower filter bins 20 based on the discharge cavities 101. Not only is the discharge balanced, but it can also effectively reduce the pressure change of the lower filter bin to affect the pressure balance of the suction filter cavity (note: the pressure in the suction filter cavity is constant during the pressure change of the lower filter bin). In this example, the suction filter direction of the upper filter bin 10 and the lower filter bin 20 is vertical based on the filter screen W. In this way, the formed adsorption swing direction is completely different, which is more conducive to the dispersion of fibers, and at the same time, the lower suction filter can relatively pull the upper fibers, thereby reducing the probability of hanging the screen.

[0048] The negative pressure pipeline 3 includes a first branch 31 and a second branch 32 respectively communicating with the lower filter bins 20, a third branch 33 and a fourth branch 34 respectively communicating with the aligned ends of the first branch 31 and the second branch 32, a fifth branch 35 for communicating the same side ends of the third branch 33 and the fourth branch 34, and a three-way pipe 36 arranged on the fifth branch 35, wherein the unconnected end of the three-way pipe 36 is the connection end of the negative pressure source, the other end of the third branch 33 and the fourth branch 34 is closed, and the third branch 33 and the fourth branch 34 are further provided with self-rotating spiral guide vanes 37. When the gas is extracted, the spiral guide vanes 37 with the same guide direction are used to assist in pressurizing and accelerating the airflow to the fifth branch 35, and through the spiral guide, the flowability of the gas is increased, thereby quickly extracting the gas and dust, reducing the residual rate of dust in the upper and lower filter bins, and also reducing the probability of "dust removal-dust raising" cycle pollution.

[0049] In this example, the airflow passage module 4 is arranged between the lower filter bin 20 and the negative pressure pipeline 3, and the negative pressure regulator 5 is arranged in the airflow passage module 4 to change the airflow direction and flow rate. The negative pressure regulator 5 is based on the intercommunication formed by the shunt cavity 101 to achieve the negative pressure difference floating and reciprocating adjustment. Based on the arrangement of the airflow passage module, the backflow is avoided to cause the airflow confusion inside the lower filter bin. The airflow passage module 4 extends along the length direction of the lower filter bin 20, and the lower filter bin 20 is correspondingly communicated with the first branch 31 and the second branch 32 of the negative pressure pipeline 3 from the middle part to the bottom. The negative pressure regulator 5 is a rotating impeller installed in the airflow passage module 4, and includes a wheel shaft 50, a blade 51, and a power element. The wheel shaft 50 extends along the length direction of the airflow passage module 4, and the blade 51 is in a strip shape and is uniformly distributed around the wheel shaft 50. That is, based on the speed difference change of the rotating impeller arranged in the two airflow passage modules 4 respectively, and combined with the intercommunication formed by the shunt cavity 101, the negative pressure of the two lower filter bins 20 is changed and periodically changed. Therefore, under different rotating speeds of the impeller, the airflow formed is not equal to form a flow difference (that is, a negative pressure difference), so that the fiber shaking frequency caused by suction filtration can meet the removal needs.

[0050] In summary, the implementation process of the embodiment includes the following steps:

[0051] S1, feeding

[0052] The cotton material is fed into the feeding section from the feeding channel M and is transmitted downward along the cotton feeding channel M. Based on the gravity, part of the fibers falls, and part of the fibers and dust are suspended in the feeding section.

[0053] S2, dust suction filtration

[0054] Based on the negative pressure, the lower filter bin 20 and the upper filter bin 10 are synchronously formed with negative pressure. The cotton material suspended in the feeding section passes through the upper and lower suction filtration areas, and the cotton material is suctioned in different positions and directions of the upper and lower filter bins 20. The airflow of the cotton material passing through the filter screen and entering the upper filter bin 10 is divided into two lower filter bins 20. The airflow entering the lower filter bin 20 is the same as the suction direction of the lower filter bin 20. Based on the suction filtration of the filter screen of the lower filter bin, the fibers freely fall under the gravity, downward pulling and floating, and the dust is collected based on the negative pressure pipeline 3.

[0055] In this example, the shunt cavity 101 is communicated from the top. In step S2, the airflow is extracted from the filter bin through the negative pressure pipeline 3 based on the sinusoidal or cosine periodic change of the negative pressure difference between the two lower filter bins 20. Based on the periodic change of the negative pressure, the fibers in the corresponding section are relatively scattered and shaken, which not only facilitates the dust to be raised and suctioned, but also further reduces the fiber screen rate, and is more conducive to the relative separation of short fibers and dust, further increases the dust removal quality and efficiency.

[0056] In summary, after adopting the dust removal process, firstly, the cotton material is sent into the feeding section from the feeding channel and is transmitted downward along the cotton inlet channel, wherein based on the self weight, part of the fibers falls, and part of the fibers and dust are suspended in the feeding section; secondly, based on the negative pressure, the lower filter bin and the upper filter bin are synchronously formed with negative pressure, the cotton material suspended in the feeding section passes through the upper and lower suction filtration zones, and under the negative pressure adsorption in different positions and different directions of the upper and lower sections, the airflow passing through the filter screen and entering the upper filter bin is divided into two lower filter bins, and the airflow divided into the lower filter bin is the same as the adsorption direction formed by the lower filter bin, and the suction filtration is formed based on the filter screen of the lower filter bin, so that the fibers freely fall in the self weight, downward pulling and floating, thereby completing the removal of dust, therefore, on the one hand, based on the cooperation of the upper and lower sections of the suction filtration, not only the suction filtration zone covers the entire feeding section and the top of the cotton inlet channel, but also the suction filtration angle is changed to pull and scatter the fibers, reduce the probability of fiber clumping and knotting, raise the dust, improve the dust filtration efficiency and quality, greatly reduce the screen hanging rate of the filter screen, reduce the cleaning and replacement frequency, and ensure the continuous and efficient operation of the production line; on the other hand, based on the shunting of the upper filter bin, without causing airflow turbulence of the lower filter bin, and also assisting the suction filtration of the lower filter bin, the dust removal quality is improved, in addition, under the suction filtration of the same negative pressure source, the negative pressures between the suction filtration cavity and the lower filter bin are different and will not interfere, avoiding the secondary dust raising and miscapture caused by improper control of the negative pressure adsorption force, thereby greatly improving the dust removal efficiency and the yield of raw materials; thirdly, the feeding channel is horizontally arranged, the cotton inlet channel is vertically arranged, and the suction filtration cavities are symmetrically arranged on the opposite sides of the feeding channel, based on the horizontal feeding of the cotton material, the cotton material is relatively scattered in the feeding section, avoiding the entanglement between the fibers to affect the suction filtration of the dust; fourthly, the suction filtration directions of the upper and lower filter bins are perpendicular based on the filter screen, so that the formed adsorption swing directions are completely different, which is more conducive to the dispersion of the fibers, and the lower section suction filtration can relatively pull the fibers of the upper section, thereby reducing the screen hanging probability; fifthly, based on the periodic change of the negative pressure, the fibers of the corresponding section are relatively scattered and swung, which not only can be conducive to the raising and suction filtration of the dust, but also further reduces the fiber screen hanging rate, and is more conducive to the relative separation of short fibers and dust, further increases the dust removal quality and efficiency, in addition, the negative pressure regulator is based on the intercommunication formed by the shunting cavity to realize the negative pressure difference floating and reciprocating adjustment, based on the arrangement of the airflow channel module, avoiding the backflow to cause the airflow turbulence inside the lower filter bin; sixthly, under different rotating speeds of the impeller, the formed airflows are different, thereby forming the flow difference (that is, the negative pressure difference), in this way, the fiber shaking frequency caused by the suction filtration can meet the removal needs; seventhly, based on the relatively parallel branch and under the relatively series connection and convergence of the through pipe, the two lower filter bins of the same negative pressure source are synchronously implemented with negative pressure, eliminating the screen hanging defects caused by the instantaneous adsorption force being too large, and through the spiral flow guiding mode, the flow of the gas is increased, thereby quickly extracting the gas and dust, reducing the residual rate of the dust in the upper and lower filter bins, also reducing the recycling pollution probability of "dust removal-dust raising";The eighth aspect is the shunt cavity design, which not only has good shunt effect, but also forms a window groove between the shunt cavity, the side wall of the inlet channel and the lower filter bin, and a transparent window is arranged on the side wall of the inlet channel corresponding to the window groove. Not only is the shape beautiful, but also the internal fiber falling condition can be observed at any time. At the same time, the size of the shunt cavity formed by the shunt cavity is equal, and the shunt plate is a right angle plate or an acute angle plate. The airflow absorbed and filtered by the suction filter cavity is evenly divided into two lower filter bins based on the shunt cavity. Not only is the shunt balanced, but also the pressure change of the lower filter bin can effectively reduce the influence on the pressure balance of the suction filter cavity (note: in the pressure change of the lower filter bin, the pressure in the suction filter cavity is constant).

[0057] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A dust removal process based on cooperative air pressure bolling box with up-down misplacement and segment suction filtration, characterized in that: The dust removal process uses a dust removal device including upper and lower dust removal units based on an upwardly and downwardly extending cotton inlet channel and arranged on the upper and lower sections of the feed section of the cotton inlet channel, wherein the upper dust removal unit includes upper filter bins arranged on opposite sides of the cotton inlet channel, and the lower dust removal unit includes lower filter bins arranged on opposite sides of the cotton inlet channel, wherein the upper filter bins and the lower filter bins are distributed in a 90° staggered manner, and each upper filter bin has a suction filter cavity and a shunt cavity, wherein each upper filter bin is connected to two lower filter bins through the shunt cavity, and a filter screen for removing dust is formed on the side wall of the cotton inlet channel corresponding to the upper and lower filter bins, and the upper and lower dust removal units share a negative pressure source and a negative pressure pipeline, and the dust removal process includes the following steps: S1, feeding The cotton material is fed into the feed section from the feeding channel and transmitted downward along the cotton inlet channel, wherein part of the fibers falls by gravity, and part of the fibers and dust are suspended in the feed section; S2, dust suction filtering Based on the negative pressure, the lower filter bin and the upper filter bin form a negative pressure at the same time, the cotton material suspended in the feed section passes through the upper and lower suction filtering zones, and the airflow of the cotton material passing through the filter screen and entering the upper filter bin is shunted to the two lower filter bins under the action of negative pressure in different positions and directions, and the airflow shunted into the lower filter bin has the same suction direction as the lower filter bin, and the filter screen of the lower filter bin forms a suction filter at the same time, so that the fibers freely fall under the action of gravity, downward pulling and floating, and the dust is collected in the dust bin through the negative pressure pipeline.

2. The dedusting process based on the cooperation of the upper and lower staggered positions and the segmented suction filtration of the cotton box according to claim 1, characterized in that: In step S1, the feeding channel is horizontally arranged, the cotton inlet channel is vertically arranged, and the suction filter cavities are symmetrically arranged on opposite sides of the feeding channel.

3. The dedusting process based on the cooperation of the upper and lower staggered positions and the segmented suction filtration of the cotton box according to claim 1, characterized in that: The shunt cavities are connected from the top, and in step S2, the airflow is extracted from the filter bin through the negative pressure pipeline by periodically changing the negative pressure difference between the two lower filter bins.

4. The dedusting process based on the cooperation of the upper and lower staggered positions and the segmented suction filtering pressure cotton box according to claim 3, characterized in that: A gas flow channel module is arranged between the lower filter bin and the negative pressure pipeline, and a negative pressure regulator for changing the flow direction and flow rate of the gas flow is arranged in the gas flow channel module, wherein the negative pressure regulator is connected to the shunt cavities to realize the floating and reciprocal adjustment of the negative pressure difference.

5. The dedusting process based on the cooperation of the upper-lower staggered position and the sectional suction filtration of the cotton box according to claim 4, characterized in that: The gas flow channel module extends along the length direction of the lower filter bin, and the lower filter bin is connected to the negative pressure pipeline from the middle part to the bottom part.

6. The dedusting process based on the upper-lower staggered position and the segmental suction filtration cooperative air pressure cotton box according to claim 4, characterized in that: The negative pressure regulator is a rotating impeller installed in the gas flow channel module, and includes a shaft, blades and a power element, wherein the shaft extends along the length direction of the gas flow channel module, the blades are in strip shape and are uniformly distributed around the shaft.

7. The dedusting process based on the cooperation of the upper-lower staggered position and the sectional suction filtration of the cotton box according to claim 6, characterized in that: In step S2, the rotating speed difference of the rotating impellers arranged in the two gas flow channel modules is changed, and the shunt cavities are connected to change the negative pressure of the two lower filter bins and periodically change the negative pressure.

8. The dedusting process based on the upper-lower staggered position and the segmental suction filtration cooperative air pressure cotton box according to claim 1, characterized in that: The negative pressure pipeline includes a first branch and a second branch connected to the lower filter bin, a third branch and a fourth branch connected to the aligned end parts of the first branch and the second branch, a fifth branch for connecting the same side end parts of the third branch and the fourth branch, and a three-way pipe arranged on the fifth branch, wherein the unconnected end of the three-way pipe is the connection end of the negative pressure source, and the other end of the third branch and the fourth branch is closed.

9. The dedusting process based on the cooperation of the upper-lower staggered position and the sectional suction filtration of the cotton box according to claim 8, characterized in that: A rotating spiral guide vane is further arranged in the third branch and the fourth branch, and in step S2, the gas flow is pressurized and accelerated to the fifth branch by the spiral guide vane with the same guide direction when the gas is extracted.

10. The dedusting process based on the upper-lower staggered position and the segmental suction filtration cooperative air pressure cotton box according to claim 1, characterized in that: A flow leakage channel is formed at the bottom of the suction filter cavity, and a flow distribution plate and a sealing plate are formed on the sidewall of the inlet cotton channel corresponding to the flow leakage channel below, wherein the sealing plate blocks the area formed by the flow distribution plate and the inlet cotton channel to form the flow distribution cavity.

11. The dedusting process based on the cooperation of the upper-lower staggered position and the sectional suction filtration of the cotton box according to claim 10, characterized in that: The flow distribution cavities have equal sizes, and the flow distribution plates are right-angle plates or acute-angle plates. In step S2, the airflow filtered from the suction filter cavity is evenly distributed to the two lower filter bins based on the flow distribution cavities.

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