A dust removal system and method for screening of material

Abstract

The application discloses a dust removal system and method for material screening, and relates to the technical field of dust removal systems, which comprises a flared discharge port connected with a storage hopper to receive material, a material distribution cone elastically mounted in the discharge port to weaken the impact kinetic energy of the material by breathing reciprocating movement to reduce dust raising, and a buffer cone surface fixedly sleeved on the flared end of the discharge port to receive the dispersed material, in the application, the intermittent impact of the collapsed material on the material distribution cone will cause the elastic breathing ring and the buffer cone surface to circulate reciprocally between expansion and contraction, the size of the outlet of the elastic breathing ring is adapted and adjusted according to the amount of the phased material falling, on the other hand, the material with weakened kinetic energy is discharged by the dynamic expansion of the buffer cone surface, the material with weakened kinetic energy is prevented from being inconveniently discharged on the buffer cone surface, and then the dynamic expansion and contraction state of the "breathing" at the discharge end is simulated, on the one hand, the kinetic energy of the material falling down is weakened, and on the other hand, the smooth discharge of the material with weakened kinetic energy is promoted.

Description

Technical Field

[0001] This invention relates to the field of dust removal system technology, specifically to a dust removal system and method for material screening. Background Technology

[0002] Rice bran, as the core raw material for rice bran oil, needs to undergo multiple rounds of meticulous sieving before production to remove impurities such as broken rice, large bran flakes, and sand, thus avoiding affecting subsequent pressing and oil yield. Broken rice is especially important because it contains starch, which can expand and clog the oil pipes during the pressing process.

[0003] Generally, rice bran is stored in a storage hopper after being sieved in batches. When discharge is needed, the baffle plate at the end of the storage port is opened, and the rice bran in the hopper will quickly collapse downwards in the form of aggregated "lumps" (similar to sand falling from a sand pile; because the sand is piled up tightly, even though the sand particles are very small, it will still collapse in clumps). Because the collapsed "lumps" are concentrated in weight and have a long collapse path, they will generate a large amount of impact dust at the receiving end. For this reason, manufacturers usually configure relatively good dust removal systems to reduce the safety hazards to personnel and equipment caused by dust flying in the workshop. However, this also inevitably leads to the waste of rice bran (the flying dust is mainly the rice bran after sieving).

[0004] Therefore, this invention proposes a material screening and dust removal system and method that reduces the kinetic energy of falling powder at the source, fundamentally reducing the size and range of powder being raised, and adopting the "external suction and internal discharge" measure for external dust, reducing material waste and promoting a modern workshop production mode with high safety, high efficiency, high quality and high environmental protection.

[0005] To address the aforementioned issues, there is an urgent need for innovative designs based on existing dust removal systems and methods used for material screening. Summary of the Invention

[0006] This invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different approach. Specifically, the invention aims to provide a dust removal system for material sieving, addressing the issue raised in the background where, during discharge, the rice bran in the hopper rapidly collapses in aggregated "lumps" due to the concentrated weight and long collapse distance, resulting in significant impact dust at the receiving end. While manufacturers typically implement relatively robust dust removal systems to reduce safety hazards to personnel and equipment caused by dust in the workshop, this also inevitably leads to rice bran waste.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a dust removal system for material screening, comprising a screen cylinder and a storage hopper connected to the lower end of the screen cylinder, and further comprising a flared discharge port connected to the storage hopper for receiving materials, a material distribution cone flexibly installed inside the discharge port and weakening the impact kinetic energy of the materials by breathing reciprocating movement to reduce dust, and a buffer cone surface fixedly sleeved on the flared end of the discharge port for receiving the dispersed materials; The internal suspension positioning of the material distribution cone is equipped with a positioning component, and the internal discharge port is provided with negative pressure grooves at equal angles. The positioning component and the negative pressure groove are equipped with a first breathing sensing component that follows the movement of the material distribution cone at equal angles, and a breathing dust suction chamber is provided at equal angles on the side wall of the discharge port to follow the movement of the first breathing sensing component and to simultaneously suck out dust and release dust inward. The lower port of the buffer cone is provided with an elastic breathing ring, and a second breathing sensing component that follows the movement of the distributing cone is installed between the elastic breathing ring and the positioning component.

[0008] Preferably, the first breathing sensing component includes an annular expansion and contraction cavity groove opened inside the positioning member and a slider slidably disposed inside the expansion and contraction cavity groove, and one side of the slider is designed with an arc-shaped bevel. The lower surface of the distribution cone at its center is fixed with a rod at an equal angle, and the lower end of the rod is a hemispherical structure. The hemispherical lower end of the insertion rod slides through the positioning member and is connected to the arc-shaped inclined surface of the slider.

[0009] Preferably, the first breathing sensing component further includes a slide rod with one end fixedly connected to the side of the slider, and the positioning component has a limiting groove inside that can accommodate the horizontal sliding of the slide rod.

[0010] Preferably, the other end of the slide rod slides through the discharge port and falls into the negative pressure groove, and the end of the slide rod located inside the negative pressure groove is fixed with a negative pressure suction cup that is slidably sealed inside the negative pressure groove; The number of insert rods, sliders, and slide bars corresponds to the number of negative pressure grooves.

[0011] Preferably, the slide rod is wound with a first spring on the outer wall inside the negative pressure groove, and one end of the first spring is welded to the side wall of the negative pressure suction cup, and the other end of the first spring is fixed to the inner wall of the negative pressure groove.

[0012] Preferably, the elastic breathing ring has a connecting ball fixed at equal angles inside, and both the connecting ball and the buffer cone surface are made of elastic material.

[0013] Preferably, the second breathing sensing component includes a breathing rod that is inverted and fixed at the center of the lower surface of the dispensing cone, and the breathing rod slides through the positioning member; The outer wall of the upper end of the breathing rod is wound with a second spring, one end of which is welded to the lower surface of the distributing cone, and the other end of which is fixed to the upper surface of the positioning member.

[0014] Preferably, the second breathing sensing component further includes a push plate that is rotatably mounted at the lower end of the breathing rod at an equal angle, and the lower end of the push plate is connected to a connecting ball; One end of an elastic diagonal rope is fixed to the surface of the connecting ball, and the other end of the elastic diagonal rope is fixed to the lower end of the positioning component.

[0015] Preferably, the side wall of the breathing dust collection chamber is inclined from high to low from the outside to the inside with respect to the discharge port, and the hollow cavity of the breathing dust collection chamber is connected to the negative pressure groove. The port of the breathing dust suction chamber located outside the discharge port is designed with an flared opening and is equipped with an external one-way valve that allows only inflow and no outflow. The breathing dust suction chamber has an internal one-way valve installed inside the port on the inside of the discharge port, which allows only outflow and not inflow.

[0016] A dust removal method for material screening includes the following steps: S1: In the negative pressure suction stage, when the distributing cone is impacted by the aggregated material, it will adaptively drop down and press the insert rod and squeeze the outer inclined surface of the slider, thereby causing the slider to move horizontally. Under the limiting force of the expansion and contraction cavity and the slide rod, the slider is forced to move close to the inner wall of the expansion and contraction cavity. The close-moving slider will also drive the slide rod to move close to the center, thereby causing the outer end of the slide rod to drive the negative pressure suction cup to move close to the inner wall of the negative pressure groove and compress the first spring. Since the end of the negative pressure groove adjacent to the negative pressure suction cup is connected to the inner cavity of the breathing suction chamber, when the negative pressure suction cup moves close to the center, it will simultaneously generate negative pressure in the inner cavity of the breathing suction chamber. When negative pressure is generated, the outer one-way valve at the outer end of the breathing suction chamber will open adaptively to suck the dust raised outside into the inner cavity of the breathing suction chamber. S2: Positive pressure discharge stage. When the material distribution cone falls in the gap of material collapse or in a dispersed manner, the impact force of the dispersed rice bran on the material distribution cone is small. Therefore, the material distribution cone will be reset vertically upward under the reset action of the second spring. Similarly, the material distribution cone that resets vertically upward will pull the insertion rod to reset upward, thereby causing the negative pressure suction cup, slide rod and slider to move in a centripetal reset under the action of the first spring, which in turn generates positive air pressure in the inner cavity of the breathing dust collection chamber. When the positive air pressure is generated, it will open the inner one-way valve at the inner end of the breathing dust collection chamber and allow the dust sucked in in the inner cavity of the breathing dust collection chamber to be discharged back into the discharge channel inside the discharge port.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by setting a first breathing sensing component, when the collapsing material intermittently impacts the distribution cone, the breathing dust collection chamber will adaptively generate negative pressure, causing the external one-way valve to adaptively open and suck the dust raised outside into the inner cavity of the breathing dust collection chamber. When the distribution cone is in the gap of material collapse or when the material falls in a dispersed manner, because the impact force of the dispersed rice bran on the distribution cone is small, the distribution cone will be reset vertically upwards by the reset action of the second spring during the gap of material collapse or when the material falls in a dispersed manner. Similarly, the vertically upward reset distribution... The cone pulls the insert rod upward to reset, causing the negative pressure suction cup, slide rod, and slider to move centrifugally under the action of the first spring. This generates positive air pressure in the inner cavity of the breathing dust collection chamber. When positive air pressure is generated, the inner one-way valve at the inner end of the breathing dust collection chamber is opened, and the dust sucked into the inner cavity of the breathing dust collection chamber is discharged back into the discharge channel inside the discharge port. On the one hand, this reduces external dust, and on the other hand, it weakens the kinetic energy of external dust and returns it to the discharge system, thus avoiding material waste to a certain extent. 2. By setting the second breathing sensing component, the present invention causes the elastic breathing ring and the buffer cone to cycle between expansion and contraction when the collapsing material intermittently impacts the distribution cone. The outlet size of the elastic breathing ring is adjusted according to the amount of material falling in stages. On the other hand, the dynamic expansion of the buffer cone helps the material with weakened kinetic energy to be discharged, preventing the material with weakened kinetic energy from remaining on the buffer cone and making it difficult to discharge. Thus, the dynamic expansion and contraction state of "breathing" at the discharge end weakens the kinetic energy of the material falling and promotes the smooth discharge of the material with weakened kinetic energy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention.

[0020] Figure 3 This is a three-dimensional structural diagram of the storage hopper, discharge port, and buffer cone surface of the present invention.

[0021] Figure 4 This is a first three-dimensional structural diagram of the discharge port and buffer cone surface of the present invention.

[0022] Figure 5 This is a schematic diagram of the second three-dimensional structure of the discharge port and buffer cone surface of the present invention.

[0023] Figure 6 This is a schematic diagram of the first three-dimensional structure of the discharge port and buffer cone surface of the present invention after being cut open.

[0024] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A in the middle.

[0025] Figure 8 This is a schematic diagram of the second three-dimensional structure of the discharge port and buffer cone surface of the present invention after being cut open.

[0026] Figure 9 For the present invention Figure 8 Enlarged structural diagram at point B.

[0027] Figure 10 This is a front view schematic diagram of the discharge port and buffer cone surface of the present invention after being cut open.

[0028] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point C.

[0029] Figure 12 This is a schematic diagram of the internal structure of the breathing dust collection chamber of the present invention after being cut open.

[0030] In the diagram: 1. Screen cylinder; 2. Storage hopper; 3. Discharge port; 31. Negative pressure groove; 4. Buffer cone surface; 41. Elastic breathing ring; 42. Connecting ball; 43. Elastic inclined rope; 44. Push plate; 5. Distributing cone; 6. Positioning component; 61. Expansion / contraction chamber groove; 62. Insert rod; 63. Slider; 64. Slide rod; 65. Negative pressure suction cup; 66. First spring; 7. Breathing rod; 71. Second spring; 8. Breathing dust suction chamber; 81. External one-way valve; 82. Internal one-way valve. Detailed Implementation

[0031] 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.

[0032] Please see Figures 1 to 12 The present invention provides a technical solution: a dust removal system for material screening, including a screen cylinder 1 and a storage hopper 2 connected to the lower end of the screen cylinder 1, and further including a flared discharge port 3 connected to the storage hopper 2 for receiving materials, a material distribution cone 5 flexibly installed inside the discharge port 3 to reduce the impact kinetic energy of materials by breathing reciprocating movement to reduce dust, and a buffer cone surface 4 fixedly sleeved on the flared end of the discharge port 3 for receiving dispersed materials; The internal suspension positioning of the material distribution cone 5 is provided with a positioning component 6, and the internal discharge port 3 is provided with negative pressure grooves 31 at equal angles. A first breathing sensing component that follows the movement of the material distribution cone 5 is installed at an equal angle between the positioning component 6 and the negative pressure groove 31, and a breathing suction chamber 8 that follows the movement of the first breathing sensing component and synchronously sucks out dust and discharges dust inward is provided through the side wall of the discharge port 3 at an equal angle. The lower port of the buffer cone surface 4 is provided with an elastic breathing ring 41, and a second breathing sensing component that follows the movement of the distributing cone 5 is installed between the elastic breathing ring 41 and the positioning component 6.

[0033] In specific implementation, the appendix Figure 1 To be continued Figure 3 As shown, the discharge cylinder of the storage hopper 2 is equipped with a pull-out sealing component, which uses a horizontally pluggable insert plate to seal and open the discharge cylinder at the lower end of the storage hopper 2. This is prior art and will not be described in detail in this invention. Although the positioning component 6 is suspended inside the material distribution cone 5, its horizontal movement is limited by the breathing rod 7 at the center, and its vertical movement is also limited by the sliding rods 64 distributed at equal angles. Therefore, the positioning component 6 maintains a relatively stable posture as the core support component of the whole.

[0034] As an optional embodiment, the first breathing sensing component includes an annular expansion and contraction cavity 61 opened inside the positioning member 6 and a slider 63 slidably disposed inside the expansion and contraction cavity 61, and one side of the slider 63 is designed with an arc-shaped inclined surface. A rod 62 is fixed perpendicularly at an equal angle on the lower surface of the center of the material distribution cone 5, and the lower end of the rod 62 is a hemispherical structure. The hemispherical lower end of the insertion rod 62 slides through the positioning member 6 and is connected to the arc-shaped inclined surface of the slider 63.

[0035] In practice, the falling rod 62 will cause its hemispherical lower end to abut and press against the outer inclined surface of the slider 63. When the outer inclined surface of the slider 63 is subjected to the abutment and pressing action in the vertical direction, the slider 63 will move in the horizontal direction and, under the limiting force of the expansion and contraction cavity 61 and the slide rod 64, will force the slider 63 to move proximal along the inner wall of the expansion and contraction cavity 61 (moving horizontally towards the central axis of the breathing rod 7).

[0036] As an optional embodiment, the first breathing sensing component further includes a slide rod 64 with one end fixedly connected to the side of the slider 63, and the positioning member 6 has a limiting groove inside that can accommodate the horizontal sliding of the slide rod 64.

[0037] In practice, the slide bar 64 is a fixed connection assembly consisting of an upper horizontal bar, an arc-shaped connecting bar, and a lower horizontal bar. This design is mainly used to prevent the slide bar 64 from interfering with the trajectory of the material distribution cone 5 when it falls.

[0038] As an optional embodiment, the other end of the slide rod 64 slides through the discharge port 3 and falls into the negative pressure groove 31, and the end of the slide rod 64 located inside the negative pressure groove 31 is fixed with a negative pressure suction cup 65 that is slidably sealed inside the negative pressure groove 31. The number of insert rods 62, sliders 63 and slide rods 64 corresponds to the number of negative pressure grooves 31.

[0039] In practice, the falling breathing rod 7 slides through the positioning member 6 and simultaneously pushes the upper end of several equally angled push plates 44 at the lower end. When the upper end of the push plate 44 is subjected to a vertical downward thrust, it will convert the downward thrust into a rotational driving force through the connecting ball 42. As a result, the upper end of the push plate 44 will rotate outward at the hinge point while falling, and the elastic breathing ring 41 will expand through the connecting ball 42. The roundness of the expanded elastic breathing ring 41 is controlled by the number of equally angled push plates 44. This application does not specifically limit the number of push plates 44.

[0040] As an optional embodiment, the outer wall of the slide rod 64 inside the negative pressure groove 31 is wound with a first spring 66, one end of the first spring 66 is welded to the side wall of the negative pressure suction cup 65, and the other end of the first spring 66 is fixed to the inner wall of the negative pressure groove 31.

[0041] In practice, the slider 63, which moves closer to the center, will simultaneously drive the slider 64 to move closer to the center, thereby causing the outer end of the slider 64 to drive the negative pressure suction cup 65 to move closer to the inner wall of the negative pressure groove 31 and compress the first spring 66. Since the end of the negative pressure groove 31 adjacent to the negative pressure suction cup 65 is connected to the inner cavity of the breathing dust collection chamber 8, when the negative pressure suction cup 65 moves closer to the center, it will simultaneously generate negative pressure in the inner cavity of the breathing dust collection chamber 8. When negative pressure is generated, the outer one-way valve 81 at the outer end of the breathing dust collection chamber 8 will open adaptively to suck the dust raised outside into the inner cavity of the breathing dust collection chamber 8.

[0042] As an optional embodiment, a connecting ball 42 is fixed at an equal angle inside the elastic breathing ring 41, and both the connecting ball 42 and the buffer cone surface 4 are made of elastic material.

[0043] As an optional embodiment, the second breathing sensing component includes a breathing rod 7 that is inverted and fixed at the center of the lower surface of the dispensing cone 5, and the breathing rod 7 slides through the positioning member 6; The outer wall of the upper end of the breathing rod 7 is wrapped with a second spring 71, one end of the second spring 71 is welded to the lower surface of the distributing cone 5, and the other end of the second spring 71 is fixed to the upper surface of the positioning member 6.

[0044] In practice, the elastic force of the second spring 71 is greater than the sum of the elastic forces of several first springs 66 distributed at equal angles, so as to prevent the material distribution cone 5 from failing to return to its original position when the impact of the material on the distribution cone 5 is small or not concentrated enough.

[0045] As an optional embodiment, the second breathing sensing component also includes a push plate 44 that is rotatably mounted at the lower end of the breathing rod 7 at an equal angle, and the lower end of the push plate 44 is connected to the connecting ball 42. One end of an elastic diagonal rope 43 is fixed to the surface of the connecting ball 42, and the other end of the elastic diagonal rope 43 is fixed to the lower end of the positioning member 6.

[0046] In practice, as the collapsing material intermittently impacts the distribution cone 5, the elastic breathing ring 41 and the buffer cone 4 cycle between expansion and contraction. The outlet size of the elastic breathing ring 41 is adjusted according to the amount of material falling in stages. At the same time, the dynamic expansion of the buffer cone 4 assists in the discharge of material whose kinetic energy has been weakened, preventing material residues from remaining on the buffer cone 4 and making it difficult to discharge. Thus, the dynamic expansion and contraction state of "breathing" is simulated at the discharge end to weaken the kinetic energy of the material falling and to promote the smooth discharge of material whose kinetic energy has been weakened.

[0047] As an optional embodiment, the side wall of the breathing dust collection chamber 8 about the discharge port 3 is inclined from high to low from the outside to the inside, and the hollow cavity of the breathing dust collection chamber 8 is connected to the negative pressure groove 31. The port of the breathing dust suction chamber 8 located outside the discharge port 3 is designed with an flared opening and is equipped with an external one-way valve 81 that allows only inflow and no outflow. The breathing dust suction chamber 8 is located inside the port of the discharge port 3 and is equipped with an internal one-way valve 82 that only allows outflow and not inflow.

[0048] In specific implementation, such as Figure 12 As shown, the outer one-way valve 81 and the inner one-way valve 82 inside the breathing vacuum chamber 8 have the same one-way ball valve structure, but the opening direction of the ball valve is opposite. The one-way ball valve structure is achieved by the cooperation of the ball valve, the elastic element and the conical groove that matches the ball valve in the existing technology. When a negative pressure is generated in the inner cavity of the breathing vacuum chamber 8, the ball valve inside the outer one-way valve 81 moves into the inner cavity of the breathing vacuum chamber 8, thereby opening the outer port of the breathing vacuum chamber 8. When a positive pressure is generated in the inner cavity of the breathing vacuum chamber 8, the ball valve inside the inner one-way valve 82 moves outward towards the inner port, thereby opening the inner port of the breathing vacuum chamber 8.

[0049] A dust removal method for material screening includes the following steps: S1: In the negative pressure suction stage, when the distributing cone 5 is impacted by the aggregated material, it will adaptively drop and press down the insert rod 62 and squeeze the outer inclined surface of the slider 63, thereby causing the slider 63 to move horizontally. Under the limiting support of the expansion and contraction cavity 61 and the slide rod 64, the slider 63 is forced to move close to the inner wall of the expansion and contraction cavity 61. The close-moving slider 63 will also drive the slide rod 64 to move close to the center, thereby causing the outer end of the slide rod 64 to drive the negative pressure suction cup 65 to move close to the inner wall of the negative pressure groove 31 and compress the first spring 66. Since the end of the negative pressure groove 31 adjacent to the negative pressure suction cup 65 is connected to the inner cavity of the breathing suction chamber 8, when the negative pressure suction cup 65 moves close to the center, it will simultaneously generate negative pressure in the inner cavity of the breathing suction chamber 8. When negative pressure is generated, the outer one-way valve 81 at the outer end of the breathing suction chamber 8 will open adaptively to suck the dust raised outside into the inner cavity of the breathing suction chamber 8. S2: Positive pressure discharge stage. When the material distribution cone 5 falls in the gap of material collapse or in a dispersed manner, the impact force of the dispersed rice bran on the material distribution cone 5 is small. Therefore, the material distribution cone 5 will be reset vertically upward under the reset action of the second spring 71. Similarly, the vertically reset material distribution cone 5 will pull the insertion rod 62 to reset upward, thereby causing the negative pressure suction cup 65, the sliding rod 64 and the slider 63 to move in a centrifugal reset under the action of the first spring 66, which in turn causes the inner cavity of the breathing dust suction chamber 8 to generate positive air pressure. When the positive air pressure is generated, the inner one-way valve 82 at the inner end of the breathing dust suction chamber 8 will be opened and the dust sucked in in the inner cavity of the breathing dust suction chamber 8 will be discharged back into the discharge channel inside the discharge port 3.

[0050] Working principle: When using this dust removal system and method for material screening, the rice bran that has passed through the screen cylinder 1 in batches will temporarily fall into the storage hopper 2 at the bottom for temporary storage. When it is necessary to discharge the material, the insert plate at the bottom of the storage hopper 2 will be pulled out, and the large amount of rice bran stored inside the storage hopper 2 will collapse quickly (similar to when sand in a sand pile slides down, because the sand is piled up relatively tightly, although the sand particles are very small, it will also collapse in a blocky shape gradually. Therefore, once the insert plate is pulled out, the rice bran in the storage hopper 2 will collapse rapidly downward in an aggregated "block" shape, and the collapse will not be continuous, but generally intermittent), and fall into the discharge port 3 from the discharge cylinder at the bottom of the storage hopper 2.

[0051] The rice bran material (hereinafter referred to as material) that collapses into the discharge port 3 will directly impact the distribution cone 5 with a relatively concentrated "large weight". Under the dispersing effect of the cone-shaped outer surface of the distribution cone 5, the concentrated material will be quickly dispersed and slide along the outer cone surface of the distribution cone 5 into the annular space with the inner wall of the discharge port 3, and finally fall into the inner side of the buffer cone surface 4 with a certain elasticity in a uniformly dispersed form. When the distribution cone 5 is impacted by a relatively "heavy" aggregated material, the distribution cone 5 will quickly and adaptively fall down and simultaneously press down the breathing rod 7 and several sets of equally angled insert rods 62, and compress the second spring 71: like Figure 6 , Figure 8 and Figure 10 As shown, the falling breathing rod 7 slides through the positioning piece 6 and simultaneously pushes the upper ends of several equally angled push plates 44 at the lower end. When the upper end of the push plate 44 is subjected to a vertical downward thrust, it converts the downward thrust into a rotational driving force through the connecting ball 42. This causes the upper end of the push plate 44 to rotate outward at the hinge point while falling, and the elastic breathing ring 41 expands through the connecting ball 42 (the roundness of the expanded elastic breathing ring 41 is controlled by the number of equally angled push plates 44, and this application does not specifically limit the number of push plates 44). Since the buffer cone surface 4 is also made of elastic material, the expansion of the elastic breathing ring 41 will also cause the buffer cone surface 4 to undergo adaptive elastic deformation. At the same time, the elasticity of the buffer cone surface 4 can accept and further buffer the material that falls from the distribution cone 5, thereby weakening the impact kinetic energy of the material when it falls and reducing dust at the receiving end. At the same time, when the distribution cone 5 is in the gap of material collapse or material dispersion... When the material falls, the impact force of the dispersed rice bran on the distribution cone 5 is relatively small. Therefore, the distribution cone 5 will be reset vertically upward during the gap of material collapse or when the material falls in a dispersed manner, due to the reset action of the second spring 71. Similarly, the vertically reset distribution cone 5 will pull the breathing rod 7 upward to reset, so that the originally expanded elastic breathing ring 41 and buffer cone 4 are reset to the initial contracted state. The effect of this design is that as the collapsing material intermittently impacts the distribution cone 5, the elastic breathing ring 41 and buffer cone 4 cycle between expansion and contraction. The outlet size of the elastic breathing ring 41 is adjusted according to the amount of material falling in stages. On the other hand, the dynamic expansion of the buffer cone 4 is used to assist the discharge of the material after the kinetic energy is weakened, preventing the material after the kinetic energy is weakened from remaining on the buffer cone 4 and making it difficult to discharge. Thus, the dynamic expansion and contraction state of "breathing" at the discharge end weakens the kinetic energy of the material collapsing and rushing down, and promotes the smooth discharge of the material after the kinetic energy is weakened.

[0052] At the same time, such as Figure 6 , Figure 8 and Figure 10As shown, the falling rod 62 causes its hemispherical lower end to abut and press against the outer inclined surface of the slider 63. When the outer inclined surface of the slider 63 is subjected to the abutment and pressure in the vertical direction, the slider 63 will move horizontally. Under the limiting force of the expansion and contraction cavity 61 and the slide rod 64, the slider 63 is forced to move proximally along the inner wall of the expansion and contraction cavity 61 (moving horizontally towards the central axis of the breathing rod 7). The proximal movement of the slider 63 will also synchronously drive the slide rod 64. 4. Proximal movement causes the outer end of the slide rod 64 to move the negative pressure suction cup 65 close to the inner wall of the negative pressure groove 31, compressing the first spring 66. Since the end of the negative pressure groove 31 adjacent to the negative pressure suction cup 65 is connected to the inner cavity of the breathing vacuum chamber 8, a negative pressure is generated synchronously in the inner cavity of the breathing vacuum chamber 8 when the negative pressure suction cup 65 moves proximal. When the negative pressure is generated, the external one-way valve 81 at the outer end of the breathing vacuum chamber 8 will open adaptively to remove the dust raised outside. Dust is drawn into the inner cavity of the breathing dust collection chamber 8. When the material distribution cone 5 falls in the gap of material collapse or in a dispersed manner, the impact force of the dispersed rice bran on the distribution cone 5 is small. Therefore, the distribution cone 5 will be reset vertically upward under the reset action of the second spring 71. Similarly, the vertically reset distribution cone 5 will pull the insertion rod 62 to reset upward, thereby causing the negative pressure suction cup 65, the sliding rod 64 and the slider 63 to move in a centripetal reset under the action of the first spring 66. This will generate positive air pressure in the inner cavity of the breathing dust collection chamber 8. When positive air pressure is generated, the inner one-way valve 82 at the inner end of the breathing dust collection chamber 8 will be opened, and the dust drawn into the inner cavity of the breathing dust collection chamber 8 will be discharged back into the discharge channel inside the discharge port 3. On the one hand, the external dust is reduced, and on the other hand, the external dust can be weakened and returned to the discharge system, which avoids material waste to a certain extent.

[0053] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dust removal system for material screening, comprising a screen cylinder (1) and a storage hopper (2) connected to the lower end of the screen cylinder (1), characterized in that: It also includes a flared discharge port (3) connected to the storage hopper (2) to receive materials, a material distribution cone (5) that is flexibly installed inside the discharge port (3) and weakens the impact kinetic energy of the material by breathing reciprocating movement to reduce dust, and a buffer cone surface (4) that is fixedly sleeved on the flared end of the discharge port (3) to receive the dispersed material. The internal suspension positioning of the material distribution cone (5) is provided with a positioning component (6), and the internal discharge port (3) is provided with a negative pressure groove (31) at equal angles. The positioning component (6) and the negative pressure groove (31) are installed at equal angles with a first breathing sensing component that follows the movement of the material distribution cone (5), and a breathing dust suction chamber (8) is provided at equal angles on the side wall of the discharge port (3) to follow the movement of the first breathing sensing component and to simultaneously suck out dust and release dust inward. The lower port of the buffer cone surface (4) is provided with an elastic breathing ring (41), and a second breathing sensing component that follows the movement of the distributing cone (5) is installed between the elastic breathing ring (41) and the positioning component (6); The breathing dust collection chamber (8) is inclined from high to low on the side wall of the discharge port (3) from the outside to the inside, and the inner cavity of the breathing dust collection chamber (8) is connected to the negative pressure groove (31). The port of the breathing dust suction chamber (8) located outside the discharge port (3) is designed with an flared opening and is equipped with an external one-way valve (81) that allows only inflow and no outflow. The breathing dust collection chamber (8) is equipped with an internal one-way valve (82) that only allows outflow and not inflow inside the port located inside the discharge port (3).

2. The dust removal system for material screening according to claim 1, characterized in that: The first breathing sensing component includes an annular expansion and contraction cavity (61) opened inside the positioning member (6) and a slider (63) slidably disposed inside the expansion and contraction cavity (61), and one side of the slider (63) is an arc-shaped inclined surface design. The lower surface of the center of the material distribution cone (5) is fixed with a rod (62) at an equal angle and the lower end of the rod (62) is a hemispherical structure; The hemispherical lower end of the insertion rod (62) slides through the positioning member (6) and is attached to the arc-shaped inclined surface of the slider (63).

3. A dust removal system for material screening according to claim 2, characterized in that: The first breathing sensing component also includes a slide rod (64) with one end fixedly connected to the side of the slider (63), and the positioning member (6) has a limiting groove inside that can be adapted to the horizontal sliding of the slide rod (64).

4. A dust removal system for material screening according to claim 3, characterized in that: The other end of the slide rod (64) slides through the discharge port (3) and falls into the negative pressure groove (31), and the end of the slide rod (64) located inside the negative pressure groove (31) is fixed with a negative pressure suction cup (65) that is slidably sealed inside the negative pressure groove (31). The number of the insert (62), slider (63) and slide bar (64) corresponds to the number of negative pressure grooves (31).

5. A dust removal system for material screening according to claim 4, characterized in that: The slide bar (64) is located inside the negative pressure groove (31) and the outer wall is wound with a first spring (66). One end of the first spring (66) is welded to the side wall of the negative pressure suction cup (65), and the other end of the first spring (66) is fixed to the inner wall of the negative pressure groove (31).

6. A dust removal system for material screening according to claim 5, characterized in that: The elastic breathing ring (41) has a connecting ball (42) fixed at equal angles inside, and both the connecting ball (42) and the buffer cone (4) are made of elastic material.

7. A dust removal system for material screening according to claim 6, characterized in that: The second breathing sensing component includes a breathing rod (7) that is inverted and fixed at the center of the lower surface of the dispensing cone (5), and the breathing rod (7) slides through the positioning member (6); The outer wall of the upper end of the breathing rod (7) is wrapped with a second spring (71), and one end of the second spring (71) is welded to the lower surface of the material distribution cone (5), and the other end of the second spring (71) is fixed to the upper surface of the positioning member (6).

8. A dust removal system for material screening according to claim 7, characterized in that: The second breathing sensing component also includes a push plate (44) that is rotatably mounted at the lower end of the breathing rod (7) at equal angles, and the lower end of the push plate (44) is connected to the connecting ball (42); One end of an elastic diagonal rope (43) is fixed to the surface of the connecting ball (42), and the other end of the elastic diagonal rope (43) is fixed to the lower end of the positioning member (6).

9. A dust removal method for material screening, applicable to the dust removal system for material screening as described in claim 7, characterized in that, Includes the following steps: S1: During the negative pressure suction stage, when the material distribution cone (5) is impacted by the aggregated material, it will adaptively drop and press down the insert rod (62) and squeeze the outer inclined surface of the slider (63), thereby causing the slider (63) to move horizontally. Under the limiting support of the expansion and contraction cavity (61) and the slide rod (64), the slider (63) is forced to move along the inner wall of the expansion and contraction cavity (61) in a proximal manner. The proximal movement of the slider (63) will also synchronously drive the slide rod (64) to move proximally, thereby causing the outer end of the slide rod (64) to drive the negative pressure suction cup. (65) The inner wall of the negative pressure groove (31) is moved in a proximal manner and the first spring (66) is compressed. Since the end of the negative pressure groove (31) adjacent to the negative pressure suction cup (65) is connected to the inner cavity of the breathing dust chamber (8), when the negative pressure suction cup (65) moves in a proximal manner, a negative pressure will be generated in the inner cavity of the breathing dust chamber (8). When the negative pressure is generated, the outer one-way valve (81) at the outer end of the breathing dust chamber (8) will open adaptively to suck the dust raised outside into the inner cavity of the breathing dust chamber (8). S2: Positive pressure discharge stage. When the material distribution cone (5) falls in the gap of material collapse or in the dispersed manner, the impact force of the dispersed rice bran on the material distribution cone (5) is small. Therefore, the material distribution cone (5) will be reset vertically upward when the material collapses or in the dispersed manner due to the reset action of the second spring (71). Similarly, the material distribution cone (5) that is reset vertically upward will pull the insert rod (62) to reset upward, so that the negative pressure suction cup (65), the slide rod (64) and the slider (63) will move in a centrifugal reset under the action of the first spring (66), thereby generating positive air pressure in the inner cavity of the breathing dust collection chamber (8). When the positive air pressure is generated, the inner one-way valve (82) at the inner end of the breathing dust collection chamber (8) will be opened and the dust sucked in in the inner cavity of the breathing dust collection chamber (8) will be discharged back into the discharge channel inside the discharge port (3).

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