Sliding type cleaning airflow screen and unblocking structure thereof

Abstract

The invention relates to the technical field of airflow screens, and discloses a sliding type cleaning airflow screen and a blockage cleaning structure thereof.The sliding type cleaning airflow screen comprises a screen cage, a stirring assembly and a blowing assembly, the stirring assembly is arranged in the screen cage, and the blowing assembly is arranged at one end of the screen cage; the screen cage comprises a fixed frame, and a screen mesh is arranged on the fixed frame; the blowing assembly comprises an air storage tank, the air storage tank is arranged above the fixing frame, a support is arranged below the air storage tank, a pulse valve is arranged above the air storage tank, a flow dividing pipe connector is arranged at the end, away from the air storage tank, of the pulse valve, and a plurality of air pipes are arranged on the flow dividing pipe connector; through cooperative work of the stirring assembly and the blowing assembly, organic combination of screening and unblocking is achieved, air flow generated by wind wheel blades in the screening process can reduce material accumulation, the blowing assembly conducts efficient unblocking when necessary, and it is ensured that the screen keeps good permeability.

Description

Technical Field

[0001] The invention belongs to the technical field of airflow screens, in particular to a sliding type cleaning airflow screen and a clearing structure thereof. Background Art

[0002] The sliding cleaning airflow screen mainly realizes the grading and screening of materials through the action of centrifugal force and airflow. It is widely used in industrial production to screen materials. It usually includes a screening cylinder with rotating blades installed inside. The rotation of the blades generates centrifugal force to screen the material on the screen.

[0003] A Chinese patent with application number 2021214889401 discloses a cantilever horizontal airflow screen backblowing screen cleaning device, comprising a cantilever horizontal airflow screen body, an air storage box, a pulse valve and a straight-through threaded pipe, a fixed support is welded on the side of the cantilever horizontal airflow screen body, the air storage box is installed on the fixed support, the pulse valve is installed on the air storage box, a shunt pipe joint is installed on the pulse valve, the straight-through threaded pipe is welded on the surface of the cantilever horizontal airflow screen body, one end of the straight-through threaded pipe passes through the interior of the cantilever horizontal airflow screen body, one end of the straight-through threaded pipe passes through the interior of the cantilever horizontal airflow screen body and is connected to a nozzle, the other end of the straight-through threaded pipe is connected to an air pipe joint, and the air pipe joint and the shunt pipe joint are connected to an air pipe; high-pressure gas backblowing is used to transmit force to the screen, and the screen is affected by the backblowing airflow, which is convenient for cleaning sticky materials applied on the screen and reducing screen blockage, but the screen cannot be effectively cleaned in time according to the blockage of the screen.

[0004] Based on the above scheme, the specifications of the screen are selected according to the particle size of the required screening material. If the particle size of the required screening material is smaller, the corresponding aperture of the screen is smaller, and the resistance of the material passing through the screen during screening increases, thereby reducing the material penetration rate and affecting the screening effect; when the material particle size is close to the aperture of the screen, the material particles are more likely to embed into the mesh holes on the screen, causing the screen to be blocked; and when the material particles with a similar aperture to the screen are embedded in the mesh holes of the screen, the degree of blockage of the screen will be accelerated, making it impossible to effectively clean the screen in time according to the blockage situation of the screen. Summary of the invention

[0005] In view of the above problems, the present invention provides a sliding cleaning airflow screen and a clearing structure thereof to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: a clearing structure for slidingly cleaning an airflow screen, comprising a screen cage, a stirring assembly and a blowing assembly, wherein the stirring assembly is arranged inside the screen cage, and the blowing assembly is arranged at one end of the screen cage; The sieve cage comprises a fixed frame, on which a sieve is arranged; The spray assembly includes an air tank, which is arranged above the fixing frame, a bracket is arranged below the air tank, a pulse valve is arranged above the air tank, a shunt pipe joint is arranged at one end of the pulse valve away from the air tank, a plurality of air pipes are arranged on the shunt pipe joint, and a nozzle is arranged at one end of the air pipe away from the shunt pipe joint; A fixing seat is arranged on the surface of the nozzle, movable rods are arranged at both ends of the fixing seat, a mounting frame is arranged at one end of the movable rod away from the fixing seat, and fan blades are arranged on the mounting frame.

[0007] Preferably, a limiting groove matched with the movable rod is provided inside the fixing seat, and a spring is arranged inside the limiting groove, and one end of the movable rod away from the mounting frame is fixedly connected to the spring.

[0008] Preferably, a plurality of ventilation grooves are provided on the surface of the mounting frame, a guide tube is provided at one end of the nozzle close to the mounting frame, and a movable slot adapted to the guide tube is provided inside the nozzle.

[0009] Preferably, a plurality of cleaning components are arranged at intervals outside the fixed frame, and the cleaning components include a plurality of nozzles, the plurality of nozzles are arranged at intervals along the length direction of the fixed frame, and the spraying direction of the nozzles is perpendicular to the screen.

[0010] Preferably, a rotating seat is provided on the surface of the mounting frame, and a rotating groove is provided at the position where the mounting frame is connected to the rotating seat; There are multiple fan blades, and the multiple fan blades are fixedly arranged on the rotating seat in a ring shape.

[0011] Preferably, the stirring assembly includes a rotating rod, an adjustment assembly is arranged on the surface of the rotating rod, and the adjustment assembly includes a wind wheel blade, both ends of the wind wheel blade are hingedly provided with a hinge seat, an electric telescopic rod is arranged at one end of the hinge seat close to the rotating rod, and the end of the electric telescopic rod away from the hinge seat is fixed on the rotating rod.

[0012] Preferably, there are multiple adjustment components, and the multiple adjustment components are evenly distributed along the circumferential direction of the rotating rod in an equidistant manner.

[0013] The present invention also provides a sliding cleaning airflow screen, including a body assembly and the above-mentioned clearing structure, the body assembly including a screening bin, a feed bin is provided at one end of the screening bin, a sealing cover is provided at the end of the screening bin away from the feed bin, the sealing cover is fixedly connected to a fixed frame at one end close to the screening bin, the bracket is fixedly arranged at one end of the screening bin close to the sealing cover, and a positioning groove compatible with the fixed seat is provided on the surface of the screening bin.

[0014] Preferably, an observation window is provided on the surface of the screening bin, a feed port is provided above the feed bin, a main shaft is provided inside the feed bin, spiral blades are provided on the surface of the main shaft, one end of the main shaft is fixedly connected to the rotating rod, and a driving mechanism is provided on the end of the main shaft away from the rotating rod.

[0015] Preferably, a frame is provided below the screening bin, a fine material discharge outlet and a coarse material discharge outlet are provided at one end of the screening bin close to the frame, sliders are provided on both sides of the frame, a slide rod is provided inside the slider, and one end of the slide rod is fixedly connected to the sealing cover.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention cooperates with structures such as a nozzle, a fixed seat, a movable rod, a mounting frame and a fan blade. When spraying, the high-pressure gas pushes the guide tube to extend, shortens the distance between the nozzle and the screen, and increases the clearing force of fixed-point spraying. At the same time, the high-pressure gas drives the fan blade to rotate to generate a rotating airflow, further enhancing the clearing effect and effectively removing the attached materials on the screen.

[0017] 2. The present invention installs a gravity sensor inside the screen cage to monitor the change of material weight in real time and accurately judge the blockage condition of the screen. When the screen is blocked, the screen is effectively cleaned by adjusting the inclination angle of the wind wheel blades and the gap between the wind wheel blades and the screen, and utilizing the scraping effect of the wind wheel blades and the high-pressure gas pulse blowing of the blowing assembly, thereby preventing the accumulation of material particles and further blocking the screen aperture.

[0018] 3. The present invention adjusts the gap between the wind wheel blades and the inner wall of the screen through an electric telescopic rod according to the particle size of the material, so that the airflow generated by the wind wheel blades can act more directly on the screen surface, further improving the material penetration rate and screening efficiency. According to the material particle size and the blockage of the screen, the gap and inclination angle between the wind wheel blades and the inner wall of the screen are adjusted by the electric telescopic rod to optimize the airflow distribution and reduce the possibility of material accumulation and screen blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention at a first viewing angle and without an observation window; Figure 2 It is a schematic diagram of the overall structure of the present invention from a second viewing angle; Figure 3 It is a schematic diagram of the structure of the machine body assembly of the present invention; Figure 4 It is a schematic diagram of the screen cage of the present invention being out of the screening bin; Figure 5 It is a partial cross-sectional schematic diagram of the screening bin structure of the present invention; Figure 6 For the present invention Figure 5 A magnified image of point A; Figure 7 This is a schematic diagram of the structure of the stirring assembly of the present invention; Figure 8 It is a schematic diagram of the structure of the nozzle of the present invention; Fig. 9 This is a schematic diagram of the assembly structure of the nozzle and the fixing seat of the present invention; Fig.10 It is a schematic cross-sectional view of the flow guide tube structure of the present invention.

[0020] In the figure: 1. body assembly; 101. screening chamber; 1011. observation window; 102. feed chamber; 1021. feed port; 1022. spiral blade; 1023. main shaft; 103. sealing cover; 104. frame; 105. fine material discharge port; 106. coarse material discharge port; 107. slide bar; 108. slide block; 2. screen cage; 201. fixing frame; 202. screen; 3. stirring assembly; 301, rotating rod; 302, electric telescopic rod; 303, hinged seat; 304, wind wheel blade; 4, spray assembly; 401, gas storage tank; 402, pulse valve; 403, shunt pipe joint; 404, air pipe; 405, nozzle; 4051, guide pipe; 406, fixed seat; 407, movable rod; 408, mounting bracket; 4081, ventilation groove; 409, fan blade; 410, bracket. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figures 1 to 3 As shown, a clearing structure of the present invention is used for sliding cleaning of airflow screen, comprising a screen cage 2, a stirring assembly 3 and a blowing assembly 4, wherein the stirring assembly 3 is arranged inside the screen cage 2, and the blowing assembly 4 is arranged at one end of the screen cage 2; like Figures 4 to 6 As shown, the screen cage 2 includes a fixed frame 201, and a screen 202 is arranged on the fixed frame 201; The spray assembly 4 includes a gas storage tank 401 for storing high-pressure gas, and the capacity and pressure design of the gas storage tank 401 must meet the requirements of the spray system to ensure that sufficient gas flow can be provided during the pulse spraying process. The gas storage tank 401 is arranged above the fixed frame 201, and a bracket 410 is arranged below the gas storage tank 401. A pulse valve 402 is arranged above the gas storage tank 401. The pulse valve 402 is periodically opened and closed according to the preset time interval and spraying time. The pulse valve 402 usually adopts an electromagnetic pulse valve, which is opened and closed by an electromagnetic coil. The power on and off of the control valve core can realize the rapid release of gas. A shunt pipe joint 403 is provided at the end of the pulse valve 402 away from the gas tank 401. The shunt pipe joint 403 evenly distributes the high-pressure gas released by the pulse valve 402 to multiple air pipes 404. The design of the shunt pipe joint 403 needs to ensure the uniformity of gas distribution to avoid affecting the clearing effect due to excessive or insufficient local gas flow. Multiple air pipes 404 are provided on the shunt pipe joint 403, and a nozzle 405 is provided at the end of the air pipe 404 away from the shunt pipe joint 403.

[0023] A plurality of cleaning components are arranged at intervals outside the fixed frame 201 , and the cleaning components include a plurality of nozzles 405 . The plurality of nozzles 405 are arranged at intervals along the length direction of the fixed frame 201 , and the spraying direction of the nozzles 405 is perpendicular to the screen 202 .

[0024] like Figure 7 As shown, the stirring assembly 3 includes a rotating rod 301, an adjusting assembly is arranged on the surface of the rotating rod 301, and the adjusting assembly includes a wind wheel blade 304, both ends of the wind wheel blade 304 are hingedly provided with a hinge seat 303, an electric telescopic rod 302 is arranged at one end of the hinge seat 303 close to the rotating rod 301, and the end of the electric telescopic rod 302 away from the hinge seat 303 is fixedly arranged on the rotating rod 301, and there are multiple adjusting assemblies, and the multiple adjusting assemblies are evenly distributed along the circumferential direction of the rotating rod 301 in an equidistant manner.

[0025] The present invention also provides a sliding type cleaning airflow screen, comprising a body assembly 1 and the above-mentioned clearing structure.

[0026] like Figure 3-5 As shown, the body assembly 1 includes a screening bin 101, a feed bin 102 is provided at one end of the screening bin 101, a sealing cover 103 is provided at the end of the screening bin 101 away from the feed bin 102, the sealing cover 103 is fixedly connected to the fixed frame 201 at one end close to the screening bin 101, the bracket 410 is fixedly arranged at one end of the screening bin 101 close to the sealing cover 103, a fixing seat 406 is provided on the surface of the nozzle 405, and a positioning groove matched with the fixing seat 406 is opened on the surface of the screening bin 101.

[0027] An observation window 1011 is provided on the surface of the screening bin 101, a feed port 1021 is provided above the feed bin 102, a main shaft 1023 is provided inside the feed bin 102, a spiral blade 1022 is provided on the surface of the main shaft 1023, one end of the main shaft 1023 is fixedly connected to the rotating rod 301, and a driving mechanism is provided on the end of the main shaft 1023 away from the rotating rod 301.

[0028] A frame 104 is arranged below the screening bin 101, and a fine material discharge port 105 and a coarse material discharge port 106 are arranged at one end of the screening bin 101 close to the frame 104. Slide blocks 108 are arranged on both sides of the frame 104, and a slide rod 107 is arranged inside the slide block 108, and one end of the slide rod 107 is fixedly connected to the sealing cover 103.

[0029] It is worth noting that the driving mechanism includes a motor and a belt transmission mechanism. Specifically, when the motor is turned on, the motor drives the belt transmission mechanism to move. Under the joint action of the motor and the belt transmission mechanism, the main shaft 1023 rotates, and the spiral blades 1022 rotate with the main shaft 1023, thereby realizing the transportation of materials. In this process, the main shaft 1023 drives the stirring component 3 to rotate together, so that the impeller blades 304 on the stirring component 3 rotate to generate airflow.

[0030] When in use, first select and replace the screen 202 of appropriate specifications according to the type of material and the particle size requirements. When replacing the screen 202, first open the sealing cover 103 and separate the sealing cover 103 from the screening bin 101, and then manually pull the sealing cover 103 in the direction away from the screening bin 101, and the sealing cover 103 drives the fixed frame 201 to move together. In this process, the sealing cover 103 drives the sliding rod 107 to move together, so that the sliding rod 107 passes through the slider 108 and moves in the direction away from the screening bin 101, and the fixed frame 201 and the screen 202 are moved out of the screening bin 101, as shown in FIG. Figure 4 The state shown makes it easy to replace the screen 202 and clean it. The slide bar 107 and the slider 108 cooperate to improve the stability during movement. At the same time, it is convenient for disassembly and assembly, saving effort. One person can easily operate it. After the screen changing operation is completed, the sealing cover 103 can be pushed, so that the sealing cover 103 drives the slide bar 107 to move toward the direction close to the screening bin 101, so that the fixed frame 201 and the screen 202 are assembled into the screening bin 101.

[0031] Start the driving mechanism, which includes a motor and a belt transmission mechanism. Specifically, turn on the motor, and the motor drives the belt transmission mechanism to make it move. Under the joint action of the motor and the belt transmission mechanism, the main shaft 1023 rotates, and the spiral blade 1022 rotates with the main shaft 1023, so as to realize the transportation of materials. The main shaft 1023 and the spiral blade 1022 cooperate with the transportation and preliminary stirring of the materials. In this process, the main shaft 1023 drives the stirring component 3 to rotate together, so that the wind wheel blade 304 on the stirring component 3 rotates to generate airflow, and at the same time, the material to be screened enters from the feed inlet 1021. Under the action of the spiral blade 1022, the material enters the interior of the screen cage 2. Under the action of the wind wheel blade 304, the material is subjected to centrifugal force and cyclone propulsion force at the same time, so that the material is sprayed onto the screen 202 of the fixed frame 201, and the smaller particle material will pass through the screen 202 and be discharged from the fine material discharge port 105, while the larger particle material will be discharged from the coarse material discharge port 106.

[0032] In the above process, the rotation of the wind wheel blades 304 generates centrifugal wind force, and the material is sprayed toward the screen 202 under the action of the centrifugal wind force. In this process, some materials will adhere to the screen 202, which may cause blockage for a long time and affect the screening efficiency. At this time, the screen 202 is cleaned by the spray component 4. Specifically, the controller controls the pulse valve 402 to open, and the high-pressure gas in the gas tank 401 is released in the form of pulses, which is distributed to each nozzle 405 through the diverter pipe joint 403 and the air pipe 404. Finally, the high-pressure gas is sprayed toward the surface of the screen 202 through the nozzle 405. The instantaneous impact force can blow away the material blocked in the aperture of the screen 202 and restore the permeability of the screen 202. This process is intermittent, aiming to efficiently clear the blockage while avoiding excessive impact on the screen 202.

[0033] As the wind wheel blades 304 rotate to generate airflow, the direction of the airflow is from the inside of the fixed frame 201 to the screen 202, while the airflow of the nozzle 405 in the spray assembly 4 is from the outside of the fixed frame 201 to the screen 202, and the airflow directions of the two are just opposite, that is, the effect of cleaning the screen 202 is improved by increasing the reaction airflow through external multi-point spraying, thereby cleaning up the material attached to the screen 202, thereby ensuring the screening accuracy and production capacity.

[0034] When in use, the specification of the screen 202 is selected according to the particle size of the material to be screened. If the particle size of the material to be screened is smaller, the corresponding aperture of the screen 202 is smaller, and the resistance of the material passing through the screen 202 during screening increases, thereby reducing the material penetration rate and affecting the screening effect; when the material particle size is close to the aperture of the screen 202, the material particles are more likely to embed into the mesh holes on the screen 202, causing the screen 202 to be blocked; and when the material particles with a similar aperture to the screen 202 are embedded in the mesh holes of the screen 202, the blockage degree of the screen 202 will be accelerated, so that the screen 202 cannot be effectively cleaned in time according to the blockage condition of the screen 202.

[0035] In order to solve the above problems, the clearing structure also includes: like Figure 6 , Figure 8 As shown, movable rods 407 are provided at both ends of the fixed seat 406, and a mounting frame 408 is provided at the end of the movable rod 407 away from the fixed seat 406. A plurality of ventilation grooves 4081 are provided on the surface of the mounting frame 408, and fan blades 409 are provided on the mounting frame 408. A rotating seat is provided on the surface of the mounting frame 408, and a rotating groove is provided at the position where the mounting frame 408 is connected to the rotating seat. There are multiple fan blades 409, and the multiple fan blades 409 are fixedly arranged on the rotating seat in a ring shape.

[0036] A limiting groove matched with the movable rod 407 is provided inside the fixing seat 406 , and a spring is arranged inside the limiting groove. One end of the movable rod 407 away from the mounting frame 408 is fixedly connected to the spring.

[0037] like Fig.10 As shown, a guide tube 4051 is provided at one end of the nozzle 405 close to the mounting frame 408 , and a movable slot adapted to the guide tube 4051 is provided inside the nozzle 405 .

[0038] During use, in order to improve the screening effect and reduce the degree of clogging of the screen 202, before screening, the gap between the wind wheel blade 304 and the inner wall of the screen 202 is adjusted to adapt to the screening of materials of different particle sizes. If the material particle size is small, it indicates that the material density is small and the fluidity is poor. At this time, it is necessary to simultaneously control the electric telescopic rod 302 at both ends of the wind wheel blade 304 to extend so that the gap between the wind wheel blade 304 and the inner wall of the screen 202 becomes smaller. Specifically, the controller controls the electric telescopic rod 302 to extend, and the electric telescopic rod 302 pushes the hinge seat 303 and the wind wheel blade 304 to move away from the rotating rod 301, thereby reducing the gap between the wind wheel blade 304 and the inner wall of the screen 202, so that the wind wheel blade 304 can ensure that the material can be effectively screened during the rotation process, while reducing the accumulation of materials on the surface of the screen 202 to avoid clogging of the screen 202.

[0039] At the same time, during screening, the function of the wind wheel blades 304 is to help the material pass through the screen 202 through airflow disturbance and centrifugal force. By reducing the gap between the wind wheel blades 304 and the inner wall of the screen 202, the smaller gap can ensure that the airflow generated by the wind wheel blades 304 acts more directly on the surface of the screen 202, so that the airflow closer to the screen 202 can assist the material penetration process, that is, the rotation of the wind wheel blades 304 and the airflow can be used to blow away or guide the accumulated material through the screen 202 in time, thereby improving the material passability, reducing accumulation, and improving the material penetration rate and screening efficiency.

[0040] It is worth noting that a gravity sensor is installed on the fixed frame 201, and the weight change of the material inside the screen cage 2 can be monitored in real time through the gravity sensor. When the screen 202 is blocked, the material cannot pass through the aperture of the screen 202 smoothly, resulting in the accumulation of materials in the screen cage 2 and the increase of weight; if the screen 202 is unblocked, the material can pass through the screen 202 smoothly, and the weight of the material in the screen cage 2 is maintained at a relatively stable level. The blockage of the screen 202 is judged by the detection value of the gravity sensor, specifically: When the detection value of the gravity sensor is within the standard range, it indicates that the screen 202 is in a normal working state, the material can pass through the screen 202 smoothly, and the screening condition of the screen cage 2 is good.

[0041] When the detection value of the gravity sensor exceeds the maximum threshold value within the standard range, it indicates that the screen 202 is blocked. When the material particle size is close to the aperture of the screen 202, the material particles are more easily embedded in the mesh holes on the screen 202, resulting in excessive material particles adhering to the surface of the screen 202. At this time, it is necessary to adjust the gap between one of the wind wheel blades 304 on the stirring assembly 3 and the screen 202. Specifically, the controller controls the electric telescopic rod 302 at both ends of the wind wheel blade 304 to extend, and the electric telescopic rod 302 pushes the hinge seat 303 and the wind wheel blade 304 to move away from the rotating rod 301, so that the wind wheel blade 304 fits the inner wall of the screen 202. Under the action of rotation, the wind wheel blade 304 scrapes off the material particles attached to the surface of the screen 202, thereby achieving the purpose of circumferential scraping of the screen 202, avoiding the accumulation of material particles on the surface of the screen 202 to further block the aperture of the screen 202 and reduce the screening efficiency.

[0042] At the same time, the airflow distribution of the screen cage 2 is changed by changing the inclination angle of another wind wheel blade 304 on the stirring assembly 3. Specifically, the controller controls the electric telescopic rod 302 on the wind wheel blade 304 close to the feeding bin 102 to extend. During this process, the electric telescopic rod 302 pushes the hinge seat 303 and the wind wheel blade 304 to move in the direction away from the rotating rod 301, so that the gap between the wind wheel blade 304 and the screen 202 at the position close to the feeding bin 102 becomes smaller. During this process, the wind wheel blade 304 is tilted, and the gap between the end of the wind wheel blade 304 close to the feeding bin 102 and the screen 202 is smaller than the gap between the end of the wind wheel blade 304 close to the coarse material discharge port 106 and the screen 202, that is, the inclination of the wind wheel blade 304 will lead to The airflow is unevenly distributed on the surface of the screen 202. The airflow speed at the end with a smaller gap is faster and the pressure is higher, which can more effectively blow away and push the material through the screen 202, realize the classification and penetration of finer particles, and avoid the material inside the screen cage 2 to be blocked at the end close to the feed bin 102, affecting the normal feeding. On the end with a larger gap, the airflow speed is relatively slow, the pressure is lower, and the movement of the material is relatively slow, which is suitable for processing larger particles of material, that is, the coarse material in the screen cage 2 that has not passed through the screen 202 is prevented from being quickly discharged from the coarse material discharge port 106 along the screen 202, thereby extending the residence time of the coarse material in the screen cage 2. Under the action of the impeller blades 304 in the stirring assembly 3, the coarse material is fully stirred and crushed to avoid material waste.

[0043] After the above operation, after a preset time, observe the change of the detection value of the gravity sensor, so that the blockage of the screen 202 and the next cleaning operation can be judged by the detection value of the gravity sensor. If the detection value of the gravity sensor decreases and is within the standard range at this time, it means that the above operation is effective in clearing the blockage of the screen 202, thereby improving the screening capacity of the screen 202. If the detection value of the gravity sensor decreases but the value does not change much at this time, it means that only by adjusting the wind wheel blades 304 to change the airflow in the screen cage 2 and the scraping method of the wind wheel blades 304, the cleaning needs of the screen 202 cannot be met. At this time, the spray assembly 4 is controlled to work, specifically as follows: The controller controls the opening of multiple pulse valves 402, adjusts the pressure of the high-pressure gas in the gas tank 401 to a preset value, releases the high-pressure gas in the gas tank 401 in the form of pulses, and distributes it to each nozzle 405 through the shunt pipe joint 403 and the air pipe 404. The high-pressure gas in the nozzle 405 will push the guide pipe 4051 to extend a preset distance. During this process, the distance moved by the mounting frame 408 is equal to the distance moved by the guide pipe 4051. The guide pipe 4051 and the mounting frame 408 are always in a combined state. The guide pipe 4051 pushes the mounting frame 408 to move in a direction away from the fixed seat 406. At this time, the spring is stretched, and the movable rod 407 moves along The nozzle 405 is fixed to the limiting groove inside the fixing seat 406 and moves with the mounting frame 408, so that the high-pressure gas inside the nozzle 405 passes through the guide tube 4051 and is sprayed from the center position of the mounting frame 408 to the surface of the screen 202. The impact force generated instantly can blow away the materials blocked in the aperture of the screen 202, that is, the guide tube 4051 is extended by a preset distance to shorten the distance between the nozzle 405 and the screen 202, thereby increasing the clearing force of the fixed-point spraying on the screen 202, and by the fixed-point spraying on the screen 202, the screen 202 is vibrated, and the materials attached to the surface of the screen 202 fall off under the action of vibration, thereby achieving the purpose of cleaning.

[0044] According to the blockage degree of the screen 202, the pressure of the high-pressure gas in the gas tank 401 is controlled by the controller, thereby changing the extension length of the guide tube 4051 in the nozzle 405, thereby shortening the distance between the nozzle 405 and the screen 202, thereby increasing the intensity of the fixed-point spraying, that is, the clearing strategy is flexibly adjusted according to the blockage degree of the screen 202, further improving the clearing effect.

[0045] It is worth noting that, initially, under the action of the spring, the mounting frame 408 supports the guide tube 4051 to prevent the guide tube 4051 from extending from the inside of the nozzle 405, that is, the guide tube 4051 is inside the nozzle 405, and the end of the guide tube 4051 close to the mounting frame 408 is in contact with the mounting frame 408. At this time, the guide tube 4051 and the mounting frame 408 are in a combined state.

[0046] After the above operation, in order to improve the cleaning effect of the screen 202, the controller controls the multiple pulse valves 402 to open and increase the pressure of the high-pressure gas in the gas tank 401, and the high-pressure gas in the gas tank 401 is distributed to each nozzle 405 through the diversion pipe joint 403 and the gas pipe 404. In this process, the high-pressure gas in the nozzle 405 pushes and makes the guide tube 4051 fully extended, but at this time the thrust generated by the high-pressure gas is much greater than the force of the spring, and the spring is stretched. Under the action of the high-pressure gas, the mounting frame 408 is forced to drive the movable rod 407 to move in the direction away from the fixed seat 406, that is, the moving distance of the mounting frame 408 is greater than the moving distance of the guide tube 4051. At this time, the guide tube 4051 and the mounting frame 408 are in a separated state, and the high-pressure gas in the nozzle 405 Part of the high-pressure gas is ejected from the guide pipe 4051 and blown toward the fan blades 409 through the ventilation grooves 4081 on the mounting frame 408. The fan blades 409 are driven to rotate under the action of the high-pressure gas, that is, the rotating seat on the mounting frame 408 rotates along the rotating grooves on the mounting frame 408. The rotation of the fan blades 409 will generate a rotating airflow, which further enhances the disturbance effect of the gas and improves the clearing efficiency. The rotating airflow is blown toward the screen 202. The energy of the high-pressure gas can be dispersed to a larger area through the rotating airflow, increasing the cleaning area of ​​the screen 202, and effectively removing the material attached to the screen 202, thereby improving the permeability of the screen 202. At the same time, the rotating airflow can form a layer of airflow curtain on the surface of the screen 202, which helps prevent the material from adhering to the screen 202 and further improves the screening efficiency.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clearing structure for sliding cleaning of airflow screens, characterized in that: It comprises a sieve cage (2), a stirring assembly (3) and a blowing assembly (4), wherein the stirring assembly (3) is arranged inside the sieve cage (2), and the blowing assembly (4) is arranged at one end of the sieve cage (2); The sieve cage (2) comprises a fixed frame (201), and a sieve (202) is arranged on the fixed frame (201); The spray assembly (4) comprises an air tank (401), the air tank (401) being arranged above the fixing frame (201), a bracket (410) being arranged below the air tank (401), a pulse valve (402) being arranged above the air tank (401), a flow dividing pipe joint (403) being arranged at one end of the pulse valve (402) away from the air tank (401), a plurality of air pipes (404) being arranged on the flow dividing pipe joint (403), and a nozzle (405) being arranged at one end of the air pipe (404) away from the flow dividing pipe joint (403); A fixed seat (406) is provided on the surface of the nozzle (405), movable rods (407) are provided at both ends of the fixed seat (406), a mounting frame (408) is provided at one end of the movable rod (407) away from the fixed seat (406), and a fan blade (409) is provided on the mounting frame (408).

2. The blockage clearing structure according to claim 1, characterized in that: A limiting groove adapted to the movable rod (407) is provided inside the fixing seat (406), and a spring is provided inside the limiting groove. One end of the movable rod (407) away from the mounting frame (408) is fixedly connected to the spring.

3. The blockage clearing structure according to claim 1, characterized in that: A plurality of ventilation grooves (4081) are provided on the surface of the mounting frame (408), a flow guide tube (4051) is provided at one end of the nozzle (405) close to the mounting frame (408), and a movable slot matching the flow guide tube (4051) is provided inside the nozzle (405).

4. The blockage clearing structure according to claim 1, characterized in that: A plurality of cleaning components are arranged at intervals outside the fixed frame (201), and the cleaning components include a plurality of nozzles (405). The plurality of nozzles (405) are arranged at intervals along the length direction of the fixed frame (201), and the spraying direction of the nozzles (405) is perpendicular to the screen (202).

5. The blockage clearing structure according to claim 1, characterized in that: A rotating seat is provided on the surface of the mounting frame (408), and a rotating groove is provided at a position where the mounting frame (408) is connected to the rotating seat; There are a plurality of fan blades (409), and the plurality of fan blades (409) are fixedly arranged on the rotating seat in a ring shape.

6. The blockage clearing structure according to claim 1, characterized in that: The stirring assembly (3) comprises a rotating rod (301), an adjusting assembly is arranged on the surface of the rotating rod (301), and the adjusting assembly comprises a wind wheel blade (304), both ends of the wind wheel blade (304) are hingedly provided with a hinge seat (303), an electric telescopic rod (302) is arranged at one end of the hinge seat (303) close to the rotating rod (301), and an end of the electric telescopic rod (302) away from the hinge seat (303) is fixedly arranged on the rotating rod (301).

7. The blockage clearing structure according to claim 6, characterized in that: There are multiple adjustment components, and the multiple adjustment components are evenly distributed along the circumferential direction of the rotating rod (301) in an equidistant manner.

8. A sliding cleaning airflow screen, characterized in that: The invention comprises a body component (1) and a clearing structure according to any one of claims 1 to 7, wherein the body component (1) comprises a screening bin (101), a feeding bin (102) is arranged at one end of the screening bin (101), a sealing cover (103) is arranged at one end of the screening bin (101) away from the feeding bin (102), an end of the sealing cover (103) close to the screening bin (101) is fixedly connected to a fixing frame (201), the bracket (410) is fixedly arranged at one end of the screening bin (101) close to the sealing cover (103), and a positioning groove matched with a fixing seat (406) is provided on the surface of the screening bin (101).

9. A sliding cleaning airflow screen according to claim 8, characterized in that: An observation window (1011) is provided on the surface of the screening bin (101), a feed port (1021) is provided above the feed bin (102), a main shaft (1023) is provided inside the feed bin (102), a spiral blade (1022) is provided on the surface of the main shaft (1023), one end of the main shaft (1023) is fixedly connected to the rotating rod (301), and a driving mechanism is provided on the end of the main shaft (1023) away from the rotating rod (301).

10. The sliding cleaning airflow screen according to claim 8, characterized in that: A frame (104) is provided below the screening bin (101); a fine material discharge port (105) and a coarse material discharge port (106) are provided at one end of the screening bin (101) close to the frame (104); sliders (108) are provided on both sides of the frame (104); a slide bar (107) is provided inside the slide bar (108); one end of the slide bar (107) is fixedly connected to the sealing cover (103).

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