Air suction type rolling cage sieve

Abstract

The invention discloses an air suction type rolling cage screen which comprises a shell, a feeding port, a discharging port, a draught fan, a round rolling screen body, an air guide plate, a discharging air seal machine, a driving device and rubber, and the feeding port and the discharging port are formed in the two opposite sides of the bottom of the shell respectively; the fan is arranged on the side wall of the shell, an air inlet faces the axial direction of the round roller screen, and the fan is used for providing negative pressure; the round roller screen is rotatably arranged in the shell through bearings at the two ends; the air deflectors are distributed in the circumferential direction of the inner wall of the round roller screen, and the included angle between the air deflectors and the axis of the round roller screen is 30-60 degrees; the discharging air seal machine is rotationally arranged on the side, close to the discharging port, in the shell through a rotating shaft. Therefore, the air suction type rolling cage screen is combined with rotation of the round rolling screen through negative pressure of the draught fan, large and small particles are efficiently separated, the draught fan sucks away the small particles and discharges the small particles through the discharging port, pollution and waste are reduced, the driving device is reasonable in transmission, stable in operation and low in maintenance cost, the discharging air seal machine prevents back suction, the rubber scraper cleans the screen, and the screening effect is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of material screening equipment, and particularly to a suction-type rotary cage sieve. Background Art

[0002] Traditional drum screening equipment mainly relies on the screen aperture to achieve particle classification, and has the following technical defects:

[0003] 1. Low screening efficiency: Only relying on the physical aperture of the screen for separation, fine particles are easy to block the screen holes, and it is impossible to separate materials with similar densities but small particle size differences.

[0004] 2. Single function: Traditional equipment cannot synchronously achieve screening and air separation, and it is difficult to effectively remove light impurities (such as dust and debris).

[0005] 3. Insufficient sealing: Existing equipment is prone to air flow backflow in a negative pressure environment, resulting in secondary mixing of the separated particles.

[0006] 4. Difficult to clean residual materials: The surface of the screen is easy to adhere to materials, and it is necessary to frequently stop the machine for cleaning.

[0007] In view of the above problems, the present invention proposes a suction-type rotary cage sieve integrating negative pressure air suction, diversion and airtight structure, and realizes the integrated operation of screening-air separation through structural innovation. Summary of the Invention

[0008] This application aims to at least solve one of the technical problems in the related art to some extent.

[0009] To this end, the first object of this application is to provide a suction-type rotary cage sieve. Through the air suction action of the fan and the rotation of the rotary cage sieve, efficient separation of large and small particles can be achieved. The negative pressure provided by the fan can quickly suck away the small particle materials, improving the screening efficiency.

[0010] The second object of this application is to provide a suction-type rotary cage sieve. The small particle materials are discharged through the small particle discharge port of the fan, reducing material flying and residue, reducing pollution to the working environment, and also avoiding material waste.

[0011] The third object of this application is to provide a suction-type rotary cage sieve. The transmission structure of the driving device is reasonably designed, and the rotating motor can stably drive the rotary cage sieve and the blanking air lock to rotate, ensuring the stable operation of the equipment and reducing the maintenance cost.

[0012] The fourth object of this application is to provide a suction-type rotary cage sieve. The airtight structure of the blanking air lock effectively prevents large particles from being sucked back up, improving the screening quality.

[0013] The fifth purpose of the present application is to provide an air-suction type roller cage screen, in which the curved scraper portion of the rubber can assist in cleaning the material on the outer surface of the roller screen, thereby ensuring the screening effect of the roller screen.

[0014] To achieve the above-mentioned objectives, the first embodiment of the present application proposes a wind-suction type roller cage screen, comprising a shell, a feed port, a discharge port, a fan, a round roller screen, an air guide plate, a discharge air shutoff, a driving device and a rubber, wherein the feed port and the discharge port are respectively arranged on opposite sides of the bottom of the shell; the fan is arranged on the side wall of the shell and the air inlet is axially facing the round roller screen, and the fan is used to provide negative pressure; the round roller screen is rotatably arranged in the shell through bearings at both ends; the air guide plate is distributed circumferentially along the inner wall of the round roller screen, and the angle with the axis of the round roller screen is 30°-60°; the discharge air shutoff is rotatably arranged in the shell near the discharge port through a rotating shaft; the driving device comprises a driving assembly, wherein the driving assembly is respectively connected to the two ends of the round roller screen and the discharge air shutoff; the fixed end of the rubber is arranged at the top edge of the discharge port, and the free end maintains elastic contact with the outer surface of the round roller screen.

[0015] The embodiment of the present application provides an air-suction type roller cage screen, which realizes efficient separation of large and small particles by combining the negative pressure of the fan with the rotation of the roller screen. The fan sucks away small particles and discharges them through the discharge port, reducing pollution and waste. The drive device has reasonable transmission, stable operation and low maintenance cost. The unloading air shut-off device prevents back-suction, and the rubber scraper cleans the screen to ensure the screening effect.

[0016] In addition, the air suction type rolling cage screen proposed in the present application may also have the following additional technical features:

[0017] In one embodiment of the present application, the driving assembly includes two groups of wheel rods, two first rack wheels, two second rack wheels, a first chain, a second chain and a rotating motor, wherein the two groups of wheel rods are rotatably arranged at the two ends of the interior of the shell, and the wheels at the two ends of the two groups of wheel rods are respectively engaged and connected with the slots at the two ends of the circular screen, so that the circular screen is driven to rotate when the wheel rods rotate; one of the two first rack wheels is fixedly connected to one end of the unloading air shut-off device, and the other first rack wheel is fixedly connected to one end of one of the wheel rods of the two groups of wheel rods; the two second rack wheels are respectively fixedly connected to the other ends of the two groups of wheel rods; the first chain is mounted on the two first rack wheels; the second chain is mounted on the two second rack wheels; the output end of the rotating motor is fixedly connected to one end of the other wheel rod of the two groups of wheel rods located on one side of the two first rack wheels.

[0018] In one embodiment of the present application, sifting holes with a pore diameter of 5 - 15 mm are evenly distributed on the screen surface of the rotary screen. Small particles enter the interior of the rotary screen through the sifting holes, and large particles are located on the outer sidewall of the rotary screen.

[0019] In one embodiment of the present application, a small particle discharge port is provided on one side of the top of the fan, and the small particle discharge port is connected to the air outlet of the fan.

[0020] In one embodiment of the present application, the feeding air lock includes a rotor provided with 6 - 8 sector blades. The rotor is in clearance fit with the inner wall of the housing to form an airtight structure, preventing large particles from being sucked back up.

[0021] In one embodiment of the present application, the rubber sheet is made of polyurethane material. An arc-shaped scraping portion matching the curvature of the outer surface of the rotary screen is provided at its free end. Through the elastic contact between the arc-shaped scraping portion and the outer surface of the rotary screen, the materials on the outer surface of the rotary screen are assisted to be cleaned.

[0022] Fan model: The fan model is selected according to efficiency: The HTF-I-3 type fire-fighting high-temperature exhaust axial flow fan can be selected. This fan has a large flow rate and high air pressure, and can meet the requirement of generating sufficient negative pressure near the rotary screen. Its power is 1.5 kW, the air volume is 5000 - 8000 m 3 / h, and the total pressure is 300 - 500 Pa.

[0023] Motor: The motor equipped with the fan can select the Y100L-2 type three-phase asynchronous motor, with a power of 3 kW, a speed of 2880 r / min, a protection level of IP54, and an insulation level of F class, which can provide stable power for the fan impeller.

[0024] Rotating motor model: For a motor with a capacity of 25000 cubic meters, a total pressure of 5000 Pa, and a power of 55 KW, if it is used to process straw, the hourly processing capacity can reach 10 tons / h, and frequency conversion adjustment is adopted at the same time.

[0025] Controller: The ACS550 type general-purpose frequency converter can be used as the controller, which can realize the speed control of the rotating motor and adjust the rotation speed of the rotary screen according to different material screening requirements.

[0026] Feeding air lock model: The SF-20 type air lock can be adopted. Its rotor is provided with 6 sector blades, the housing material is carbon steel, and the processing capacity is 2 - 5 m 3 / h, which can meet the discharge requirement of large particle materials.

[0027] Rubber sheet material and specifications: Polyurethane rubber sheet with a Shore hardness of 60A is adopted, with a thickness of 5 mm and a width of 100 mm. The curvature of the arc-shaped scraping portion at its free end is precisely matched with the curvature of the outer surface of the rotary screen, and can effectively scrape off the materials adhered to the outer surface of the rotary screen.

[0028] The first chain and the second chain: The 08B-1 type single-row roller chain is selected, with a pitch of 12.7 mm, which can ensure the stability and reliability of the transmission.

[0029] The first rack gear and the second rack gear: They are made of 45 steel, quenched and tempered, with a hardness of HRC40-45, a module of 3, and the number of teeth is designed according to the actual transmission ratio to ensure the synchronous operation of the rotary screen and the blanking air lock.

[0030] The advantages of this application compared with the existing technology are as follows:

[0031] (1) Through the air suction effect of the fan and combined with the rotation of the rotary screen, efficient separation of large and small particles can be achieved. The negative pressure provided by the fan can quickly suck away the small particle materials, improving the screening efficiency.

[0032] (2) The small particle materials are discharged through the small particle discharge port of the fan, reducing material flying and residue, reducing the pollution of the working environment, and also avoiding material waste.

[0033] (3) The transmission structure of the drive device is reasonably designed. The rotating motor can stably drive the rotary screen and the blanking air lock to rotate, ensuring the stable operation of the equipment and reducing the maintenance cost.

[0034] (4) The airtight structure of the blanking air lock effectively prevents the back-suction of large particles, improving the screening quality.

[0035] (5) The arc-shaped scraping part of the rubber can assist in cleaning the materials on the outer surface of the rotary screen, ensuring the screening effect of the rotary screen.

[0036] The additional aspects and advantages of this application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of this application. Description of the Drawings

[0037] The above-mentioned and / or additional aspects and advantages of this application will become obvious and easy to understand from the following description of the embodiments in conjunction with the drawings, where:

[0038] Figure 1 is a perspective view of a suction-type rotary cage screen according to an embodiment of this application;

[0039] Figure 2 is a perspective view of a suction-type rotary cage screen according to another embodiment of this application;

[0040] Figure 3 is a perspective view of a suction-type rotary cage screen according to another embodiment of this application;

[0041] Figure 4 Internal structure schematic diagram of a wind-suction type rotary cage sieve according to an embodiment of the present application;

[0042] Figure 5 Internal structure schematic diagram of a wind-suction type rotary cage sieve according to another embodiment of the present application;

[0043] Figure 6 Magnified view of the structural details of a wind-suction type rotary cage sieve according to an embodiment of the present application.

[0044] As shown in the figure: 1. Housing; 2. Feed inlet; 3. Discharge outlet; 4. Fan; 5. Rotary cage sieve; 6. Air guide plate; 7. Downward feeding air lock; 8. Driving device; 9. Rubber; 81. Driving assembly; 811. Rotating wheel rod; 812. First rack wheel; 813. Second rack wheel; 814. First chain; 815. Second chain; 816. Rotating motor; 51. Sieving holes; 41. Discharge outlet for small particulate matter. Detailed implementation manners

[0045] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application. On the contrary, the embodiments of the present application include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0046] A wind-suction type rotary cage sieve according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0047] As Figures 1-6 shown, a wind-suction type rotary cage sieve according to an embodiment of the present application may include a housing 1, a feed inlet 2, a discharge outlet 3, a fan 4, a rotary cage sieve 5, an air guide plate 6, a downward feeding air lock 7, a driving device 8, and a rubber 9.

[0048] It can be understood that the material to be sieved enters the interior of the housing 1 from the feed inlet 2. Since the feed inlet 2 and the discharge outlet 3 are respectively arranged on opposite sides of the bottom of the housing 1, after the material enters, it will move towards the discharge outlet 3 under the action of gravity and the operation of subsequent equipment.

[0049] The fan 4 is arranged on the side wall of the housing 1, and the air inlet faces the axial direction of the rotary cage sieve 5. After the fan 4 is started, it provides negative pressure. During the rotation of the rotary cage sieve 5, this negative pressure environment helps to suck away the small particulate material from the inside of the rotary cage sieve 5, realizing the preliminary separation of large and small particles.

[0050] The rotary screen 5 is rotatably arranged in the housing 1 through bearings at both ends. When the driving assembly 81 of the driving device 8 starts to work, it will drive the rotary screen 5 to rotate. During the rotation of the rotary screen 5, the material continuously tumbles and moves. Small particles have the opportunity to pass through the rotary screen 5, while large particles remain outside the rotary screen 5.

[0051] The air guide plate 6 is fixedly arranged on the inner wall of the rotary screen 5 and rotates with the rotation of the rotary screen 5. The air guide plate 6 can guide the airflow generated by the fan 4, enabling the airflow to act on the material better, enhancing the adsorption effect on small particle materials, and improving the screening efficiency. The air guide plate is preferably 4 pieces, evenly distributed circumferentially along the inner wall of the rotary screen, with an angle of 45° with the axis of the screen cylinder. The length of a single air guide plate is 1 / 2 of the axial length of the rotary screen, and the width is 80 mm. It is fixed to the inner side of the screen mesh by bolts, effectively enhancing the air suction separation effect.

[0052] The blanking air lock 7 is rotatably arranged in the housing 1 near the discharge port 3 through a rotating shaft. When the large particle material reaches near the discharge port 3 with the rotation of the rotary screen 5, the driving assembly 81 drives the blanking air lock 7 to rotate, discharging the large particle material from the discharge port 3. At the same time, the blanking air lock 7 can also play a certain sealing role to prevent external air from entering or internal airflow from leaking.

[0053] The fixed end of the rubber sheet 9 is arranged at the top edge of the discharge port 3, and the free end is in elastic contact with the outer surface of the rotary screen 5. During the rotation of the rotary screen 5, the rubber sheet 9 can scrape off the material adhered to the outer surface of the rotary screen 5, ensuring the screening effect of the rotary screen 5 and avoiding clogging of the screen holes.

[0054] In an embodiment of the present application, as Figures 1-6 shown, the driving assembly 81 includes two groups of runner rods 811, two first rack wheels 812, two second rack wheels 813, a first chain 814, a second chain 815, and a rotating motor 816.

[0055] It can be understood that when the rotating motor 816 is turned on, its output end starts to rotate. Since the output end of the rotating motor 816 is fixedly connected to one end of the other runner rod in the two groups of runner rods 811 on one side of the two first rack wheels 812, the rotation of the rotating motor 816 will directly drive the connected runner rod 811 to start rotating.

[0056] The two groups of runner rods 811 are respectively rotatably arranged at both ends inside the housing 1, and the runners at both ends thereof are respectively engaged with the card slots at both ends of the rotary screen 5. When the rotating motor 816 drives one of the runner rods 811 to rotate, this runner rod 811 drives the rotary screen 5 to rotate through the engagement of the runners at both ends with the card slots of the rotary screen 5, enabling the rotary screen 5 to start the material screening work.

[0057] Two second rack wheels 813 are respectively fixedly connected to the other ends of two groups of runner rods 811, and a second chain 815 is sleeved on the two second rack wheels 813. When the rotating motor 816 drives the connected runner rod 811 to rotate, the second rack wheel 813 on the runner rod 811 rotates accordingly. Through the transmission of the second chain 815, the second rack wheel 813 on the other runner rod 811 is driven to rotate, thereby causing the other runner rod 811 to start rotating. In this way, the two groups of runner rods 811 rotate synchronously, jointly driving the rotary screen 5 to rotate stably.

[0058] Among the two first rack wheels 812, one is fixedly connected to one end of the blanking air lock 7, and the other is fixedly connected to one end of one of the two groups of runner rods 811. And a first chain 814 is sleeved on the two first rack wheels 812. When the runner rod 811 rotates, the first rack wheel 812 connected thereto rotates. Through the transmission of the first chain 814, the first rack wheel 812 connected to the blanking air lock 7 is driven to rotate, thereby causing the blanking air lock 7 to start rotating. The rotation of the blanking air lock 7 can discharge the screened large-particle materials from the discharge port 3, and at the same time play a sealing role to prevent the reverse flow of air.

[0059] In summary, the drive assembly 81 provides power through the rotating motor 816, and uses the transmission of the chain and the rack wheel to realize the rotation of the rotary screen 5 and the operation of the blanking air lock 7, so that the screening and discharging operations of the air-suction rotary cage screen can be coordinated.

[0060] In an embodiment of the present application, as Figures 1-6 shown, sieve holes 51 with a pore diameter of 5-15 mm are evenly distributed on the sieve surface of the rotary screen 5. Small particles enter the interior of the rotary screen 5 through the sieve holes 51, and large particles are located on the outer side wall of the rotary screen 5.

[0061] It can be understood that when the air-suction rotary cage screen is started, the material to be screened enters the working space formed by the housing 1 from the feed port 2 and immediately contacts the rotating rotary screen 5.

[0062] The rotary screen 5 continues to rotate, and the material continuously tumbles and moves on its surface. Sieve holes 51 with a pore diameter in the range of 5-15 mm are evenly distributed on the sieve surface of the rotary screen 5, and these sieve holes 51 become the key structure for material screening. During the movement of the material, small-particle materials with a particle size smaller than the pore diameter of the sieve holes 51 smoothly pass through the sieve holes 51 by virtue of their own gravity and the acting force generated by the rotation of the rotary screen 5, and enter the internal space of the rotary screen 5.

[0063] Meanwhile, large particle materials with a particle size larger than the aperture of the screening hole 51 cannot pass through the screening hole 51 and can only remain on the outer wall of the rotary screen 5. As the rotary screen 5 continues to rotate, the large particle materials move continuously on the outer wall and gradually move towards the direction close to the discharge port 3. For the small particle materials that enter the interior of the rotary screen 5, under the negative pressure generated by the fan 4 and the assistance of the air flow guided by the air guide plate 6, they are quickly sucked towards the air inlet direction of the fan 4 and finally discharged from the equipment through the small particle material discharge port 41 connected to one side of the top of the fan 4.

[0064] During the whole process, the screen mesh and the screening hole 51 of the rotary screen 5 have stable structures. The evenly distributed screening holes 51 ensure the comprehensiveness and accuracy of material screening, effectively realizing the efficient separation of large and small particle materials based on particle size differences, and laying a foundation for the classified collection and treatment of subsequent materials.

[0065] In an embodiment of the present application, as Figures 1-6 shown, a small particle material discharge port 41 is provided on one side of the top of the fan 4, and the small particle material discharge port 41 is connected to the air outlet of the fan 4.

[0066] It can be understood that when the equipment is started, the fan 4 starts to operate. Its structural design with the air inlet facing the axial direction of the rotary screen 5 on the side wall of the housing 1 enables the fan 4 to generate a negative pressure environment in the area near the rotary screen 5.

[0067] As the rotary screen 5 rotates, the materials move on the screen mesh. Small particle materials with a particle size smaller than the screening hole 51 of the screen mesh pass through the screening hole 51 and enter the interior of the rotary screen 5. At this time, the negative pressure air flow generated by the fan 4 quickly sucks these small particle materials towards the air inlet of the fan 4.

[0068] Since a small particle material discharge port 41 is provided on one side of the top of the fan 4 and the small particle material discharge port 41 is connected to the air outlet of the fan 4, the small particle materials sucked into the fan 4 will flow with the air flow inside the fan, be discharged from the air outlet, and enter the small particle material discharge port 41 along the connection channel. Finally, the small particle materials are discharged to the outside of the equipment through the small particle material discharge port 41, completing the transfer process of small particle materials from the screening area to the collection area. This design ensures that small particle materials can be efficiently and directionally collected, avoiding material flying and residue, reducing pollution to the working environment, and at the same time realizing the effective recovery of materials and avoiding waste.

[0069] It should be noted that the fan 4 described in this embodiment is mainly composed of components such as a motor, an impeller, a casing, an air inlet, and an air outlet. The motor is the power source of the fan 4. After being powered on, it converts electrical energy into mechanical energy and drives the impeller to rotate at a high speed. The impeller usually consists of multiple blades. During the high-speed rotation process, it will push the air to flow quickly and form a strong air flow inside the fan 4.

[0070] In one embodiment of the present application, as Figures 1-6 shown, the blanking air lock 7 includes a rotor provided with 6 - 8 sector blades. The rotor is in clearance fit with the inner wall of the housing 1 to form an airtight structure, preventing large particulate matter from being sucked back up.

[0071] It can be understood that when the rotary screen 5 rotates continuously and conveys large particulate materials to the side close to the discharge port 3, the blanking air lock 7 running synchronously with the rotary screen 5 starts to work. As the rotor rotates, the sector blades pass through the area of the discharge port 3 in sequence. When the sector blade rotates to the position opposite to the discharge port 3, under the action of gravity, the large particulate materials fall from the discharge port 3 into the space between two adjacent sector blades.

[0072] Meanwhile, there is a carefully designed clearance fit between the rotor and the inner wall of the housing 1. Due to the continuous rotation of the rotor, there is always a very small clearance between the sector blade and the inner wall of the housing 1, and this clearance fit forms an effective airtight structure. In the environment where the negative pressure is generated by the operation of the fan 4, this airtight structure can effectively prevent a large amount of external air from pouring into from the discharge port 3, avoiding the re - suction of the large particulate materials that have reached near the discharge port 3 back to the screening area of the rotary screen 5 due to the reverse flow of air.

[0073] As the rotor rotates continuously, the sector blades loaded with large particulate materials gradually rotate out of the position of the discharge port 3, and the large particulate materials are discharged from the equipment under the action of gravity from the space between the sector blades. In this way, the blanking air lock 7 can not only orderly discharge the large particulate materials, but also, through its unique airtight structure, ensure the stability and efficiency of the screening process of the air - suction type rotary cage screen, greatly improving the screening quality.

[0074] In one embodiment of the present application, as Figures 1-6 shown, the rubber sheet 9 is made of polyurethane material, and its free end is provided with an arc - shaped scraping portion that matches the curvature of the outer surface of the rotary screen 5. Through the elastic contact between the arc - shaped scraping portion and the outer surface of the rotary screen 5, it assists in cleaning the materials on the outer surface of the rotary screen 5.

[0075] It can be understood that the rubber sheet 9 is made of polyurethane material. This material has good elasticity, wear resistance and corrosion resistance, can adapt to complex working environments, and ensure long - term stable use. Its fixed end is set at the top edge of the discharge port 3, and its free end is provided with an arc - shaped scraping portion that matches the curvature of the outer surface of the rotary screen 5.

[0076] When the rotary screen 5 starts to rotate driven by the driving device 8, the arc - shaped scraping portion of the rubber sheet 9 keeps elastic contact with the outer surface of the rotary screen 5. As the rotary screen 5 rotates continuously, the materials on its outer surface continuously make relative movements with the arc - shaped scraping portion. In this process, the arc - shaped scraping portion will scrape the materials adhered to the outer surface of the rotary screen 5.

[0077] Some large particle materials may adhere to the outer surface of the rotary screen 5 due to reasons such as electrostatic adsorption and moisture, affecting the permeability of the sieve holes 51, and thus reducing the screening efficiency. The arc-shaped scraping part of the rubber sheet 9 can scrape off these adhered materials in time through elastic contact. The scraped-off materials will, under the action of gravity, continue to be discharged from the equipment towards the discharge port 3 along the rotation direction of the rotary screen 5.

[0078] The rubber sheet 9 continuously assists in cleaning the materials on the outer surface of the rotary screen 5 through the elastic contact of its arc-shaped scraping part with the outer surface of the rotary screen 5, ensuring the smoothness of the sieve holes 51, enabling the rotary screen 5 to always maintain a good screening effect, and guaranteeing the efficient and stable operation of the entire air-suction type rotary cage screen.

[0079] It should be noted that the control method of this application can be automatically controlled through a controller. The control method of the controller can be realized by simple programming by those skilled in the art, which belongs to the common general knowledge in this field. And this application mainly aims to protect the mechanical structure, so the control method and circuit connection of this application will not be explained in detail.

[0080] Specifically, the following is the complete specific usage process and operation steps of the air-suction type rotary cage screen:

[0081] I. Startup stage

[0082] 1. Connect the power supply and start the fan 4. The motor of the fan 4 starts to work, driving the impeller to rotate at high speed, forming a strong air flow inside the fan 4. Its structure with the air inlet facing the axial direction of the rotary screen 5 on the side wall of the housing 1 enables the fan 4 to create a negative pressure environment in the area near the rotary screen 5.

[0083] 2. Start the rotation motor 816 of the driving device 8. The output end of the rotation motor 816 rotates, driving the runner rod 811 connected to it to start rotating. Since the two ends of the two runner rods 811 are respectively engaged with the two ends of the rotary screen 5 through the card slots, the runner rod 811 drives the rotary screen 5 to rotate through the engagement of the card slots. At the same time, the second rack gear 813 on the runner rod 811 rotates accordingly, and through the transmission of the second chain 815, drives the second rack gear 813 on the other runner rod 811 to rotate, thereby causing the other runner rod 811 to also start rotating. The two runner rods 811 rotate synchronously, jointly driving the rotary screen 5 to rotate stably. In addition, the first rack gear 812 connected to one end of the runner rod 811 rotates, and through the transmission of the first chain 814, drives the first rack gear 812 connected to the feeding air lock 7 to rotate, thereby causing the feeding air lock 7 to start rotating.

[0084] II. Screening stage

[0085] 1. The material to be screened is conveyed to the lower part of the housing 1 through a conveying mechanism. Since the feeding is not in the traditional way of putting in, but by using the air suction principle, under the action of negative pressure, the lighter materials will be sucked into the housing 1. The feeding port 2 and the discharging port 3 are respectively arranged on the opposite sides at the bottom of the housing 1. After the materials enter the housing 1, they move towards the discharging port 3 under the combined action of gravity and air flow, and come into contact with the rotating circular vibrating screen 5.

[0086] 2. The circular vibrating screen 5 rotates continuously, and the materials roll and move on its surface constantly. The screening holes 51 with pore diameters in the range of 5 - 15 mm are evenly distributed on the screen surface of the circular vibrating screen 5. The small particle materials with particle sizes smaller than the pore diameter of the screening holes 51 pass through the screening holes 51 under the combined action of their own gravity and the centrifugal force, frictional force, etc. generated by the rotation of the circular vibrating screen 5, and enter the internal space of the circular vibrating screen 5. At this time, the negative pressure air flow generated by the fan 4 quickly sucks these small particle materials towards the air inlet direction of the fan 4. At the same time, the air guiding plate 6 fixed on the inner wall of the circular vibrating screen 5 rotates with the circular vibrating screen 5, guiding the air flow generated by the fan 4 and enhancing the adsorption effect on the small particle materials.

[0087] 3. The small particle materials sucked into the fan 4 are discharged from the air outlet along with the air flow inside the fan, and enter the small particle discharging port 41 on one side of the top of the fan 4 along the connecting channel, and are finally discharged to the outside of the equipment through the small particle discharging port 41.

[0088] 4. The large particle materials with particle sizes larger than the pore diameter of the screening holes 51 cannot pass through the screening holes 51 and remain on the outer side wall of the circular vibrating screen 5. With the continuous rotation of the circular vibrating screen 5, the large particle materials move constantly on the outer side wall and gradually move towards the direction close to the discharging port 3.

[0089] III. Discharging Stage

[0090] 1. When the large particle materials reach near the discharging port 3 with the rotation of the circular vibrating screen 5, the synchronously operating discharging air lock 7 starts to work. The rotor of the discharging air lock 7 rotates. It is provided with 6 - 8 sector blades. When the sector blades rotate to the position opposite to the discharging port 3, the large particle materials fall into the space between two adjacent sector blades under the action of gravity from the discharging port 3.

[0091] 2. The clearance fit between the rotor and the inner wall of the housing 1 forms an airtight structure, which effectively prevents a large amount of external air from pouring in from the discharging port 3 in the environment of negative pressure generated by the operation of the fan 4, and avoids the large particle materials being re - sucked back into the screening area of the circular vibrating screen 5.

[0092] 3. With the continuous rotation of the rotor, the sector blades loaded with large particle materials gradually rotate out of the position of the discharging port 3, and the large particle materials are discharged from the equipment under the action of gravity from the space between the sector blades.

[0093] 4. During the rotation of the rotary screen 5, the arc-shaped scraping part of the rubber sheet 9 is in elastic contact with the outer surface of the rotary screen 5, scraping off the materials adhering to the outer surface of the rotary screen 5. Under the action of gravity, the scraped materials continue to be discharged from the equipment towards the discharge port 3 along the rotation direction of the rotary screen 5, ensuring the smoothness of the sieve holes 51 and guaranteeing the screening effect of the rotary screen 5.

[0094] In summary, an air-suction type rotary cage screen according to an embodiment of the present application realizes efficient separation of large and small particles by combining the negative pressure of the fan with the rotation of the rotary screen. The fan sucks away small particles and discharges them through the discharge port, reducing pollution and waste. The driving device has reasonable transmission, stable operation, and low maintenance cost. The feeding air-lock prevent backflow, and the rubber sheet scraper cleans the screen, ensuring the screening effect.

[0095] In the description of this specification, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0096] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0097] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A wind suction type rolling cage screen, characterized in that: It comprises a housing (1), a feed port (2), a discharge port (3), a fan (4), a spherical screen (5), an air guide plate (6), a feed air shut-off device (7), a driving device (8) and a rubber (9), wherein: The feed port (2) and the discharge port (3) are respectively arranged on two opposite sides of the bottom of the shell (1); The fan (4) is arranged on the side wall of the housing (1) with the air inlet facing the axial direction of the spherical screen (5), and the fan (4) is used to provide negative pressure; The spherical screen (5) is rotatably arranged in the housing (1) via bearings at both ends; The air guide plates (6) are distributed along the circumferential direction of the inner wall of the spherical screen (5), and the angle between the air guide plates (6) and the axis of the spherical screen (5) is 30°-60°; The unloading air lock (7) is rotatably arranged in the housing (1) on a side close to the discharge port (3) via a rotating shaft; The driving device (8) comprises a driving assembly (81), wherein: The driving assembly (81) is respectively connected to the two ends of the tumble screen (5) and the unloading air shutoff device (7); The fixed end of the rubber (9) is arranged at the top edge of the discharge port (3), and the free end maintains elastic contact with the outer surface of the spherical screen (5).

2. The air suction type rolling cage screen according to claim 1, characterized in that: The driving assembly (81) comprises two sets of rotating wheel rods (811), two first rack wheels (812), two second rack wheels (813), a first chain (814), a second chain (815) and a rotating motor (816), wherein: The two groups of rotating wheel rods (811) are rotatably arranged at the two ends of the housing (1), and the rotating wheels at the two ends of the two groups of rotating wheel rods (811) are respectively engaged with the two end slots of the round screen (5), so that the round screen (5) is driven to rotate when the rotating wheel rods (811) rotate. One of the two first rack wheels (812) is fixedly connected to one end of the unloading air lock (7), and the other first rack wheel is fixedly connected to one end of one of the two sets of rotating wheel rods (811); The two second rack wheels (813) are respectively fixedly connected to the other ends of the two sets of rotating wheel rods (811); The first chain (814) is sleeved on the two first rack wheels (812); The second chain (815) is sleeved on the two second rack wheels (813); The output end of the rotating motor (816) is fixedly connected to one end of another rotating wheel rod of the two groups of rotating wheel rods (811) located on one side of the two first rack wheels (812).

3. The air suction type rolling cage screen according to claim 1, characterized in that: The screen surface of the spherical screen (5) is evenly distributed with sieving holes (51) with a hole diameter of 5-15 mm, small particles enter the interior of the spherical screen (5) through the sieving holes (51), and large particles are located on the outer side wall of the spherical screen (5).

4. The air suction type rolling cage screen according to claim 1, characterized in that: A small particle discharge port (41) is provided on one side of the top of the fan (4), and the small particle discharge port (41) is connected to the air outlet of the fan (4).

5. The air suction type rolling cage screen according to claim 1, characterized in that: The unloading air lock (7) comprises a rotor with 6-8 fan-shaped blades, and the rotor and the inner wall of the housing (1) are gap-matched to form an air-tight structure to prevent large particles from being sucked back.

6. The air suction type rolling cage screen according to claim 1, characterized in that: The rubber (9) is made of polyurethane material, and its free end is provided with an arc-shaped scraper portion that matches the curvature of the outer surface of the tumble screen (5). The arc-shaped scraper portion is in elastic contact with the outer surface of the tumble screen (5) to assist in cleaning the material on the outer surface of the tumble screen (5).

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