Cleaning sieve for grain warehousing

Abstract

The invention discloses a cleaning sieve for grain warehousing, and belongs to the technical field of grain processing equipment. The device comprises a screening box, one end of the screening box is obliquely arranged upwards and fixedly connected with a feeding cover, a feeding port is formed in one side of the feeding cover, a mounting frame is fixedly connected to the interior of the screening box, a vibrating screen is fixedly mounted in the middle of the mounting frame, and an air supply assembly is arranged above the vibrating screen; the air supply direction of the air supply assembly faces the feeding cover. A base is arranged below the screening box, a covering device is fixedly installed on the side edge of the base, and the covering device comprises a tarpaulin assembly used for covering the cleaning screen and a traction assembly used for pulling the tarpaulin assembly to move; the covering device is arranged, a traction assembly is used for driving a tarpaulin assembly to automatically retract and move, automatic covering of the device is achieved, the device is shielded and protected during rainfall, and aging and rusting of a mechanical structure of the device are avoided; and meanwhile, the low covering speed caused by manual covering operation and the safety problem caused by personnel climbing are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of grain processing equipment, in particular to a cleaning screen for grain storage. Background Art

[0002] Before grain is put into storage, basic cleaning is required to remove most impurities and reduce the accumulation of insects and mildew, so as to ensure the purity of the grain entering the warehouse and ensure the safety of grain storage.

[0003] Currently, grain storage companies must promptly cover and clean the screens with rainproof materials after daily operations, both during grain storage and during daily equipment management. Failure to promptly cover equipment during rainy weather can damage the equipment and accelerate its aging. Generally, on-site covering is done manually, so most rainproof materials are made of lightweight materials such as plastic film and tarpaulin. Otherwise, they would be too heavy to cover manually. However, these lightweight materials often lack structural strength, making them difficult to reuse and store for long periods. They are often scratched by equipment or blown off by strong winds, seriously affecting the equipment's rainproofing effectiveness. Furthermore, in emergency situations, personnel climbing up to cover equipment can easily lead to accidents and other safety issues. Summary of the Invention

[0004] The present invention provides a cleaning screen for grain storage, which can solve the problems in the prior art that the cleaning screen cannot be covered in time and safely and the equipment has poor ability to resist rainy weather.

[0005] The present invention provides a cleaning screen for grain storage, comprising a screening box, one end of the screening box is arranged to be tilted upward and fixedly connected to a feed cover, a feed port is opened on one side of the feed cover, a mounting frame is fixedly connected to the interior of the screening box, a vibrating screen is fixedly installed on the middle part of the mounting frame, an air supply assembly is arranged above the vibrating screen, and the air supply direction of the air supply assembly is toward the feed cover; a base is arranged below the screening box, a covering device is fixedly installed on the side of the base, and the covering device comprises a tarpaulin assembly for covering the cleaning screen and a traction assembly for traction the tarpaulin assembly to move.

[0006] As a further solution of the present invention: the tarpaulin assembly includes a fixed frame, the bottom of the fixed frame is fixedly connected to the base, a movable frame is provided on one side of the fixed frame, the middle of both sides of the base are fixedly connected to sliding frames, the two sides of the bottom of the movable frame are respectively slidably connected to two sliding frames, and a rainproof tarpaulin is fixedly connected between the fixed frame and the movable frame.

[0007] As a further solution of the present invention: one end of the screening box is fixedly connected to a material receiving rack, and one end of the base close to the feed cover is fixedly connected to a support frame. The traction assembly includes two traction units, and the two traction units are respectively fixedly installed on the top of the material receiving rack and the support frame. The traction unit includes a reduction motor, and the output end of the reduction motor is fixedly connected to a transmission rod, the middle part of the transmission rod is fixedly connected to a winding drum, the middle part of the winding drum is fixedly connected to a wire rope, and one end of the wire rope is fixedly connected to the movable frame.

[0008] As a further solution of the present invention: a shielding frame is rotatably connected to a side of the fixed frame away from the movable frame, and a curtain is fixedly connected between the shielding frame and the fixed frame.

[0009] As a further solution of the present invention: the air supply assembly includes an air supply frame, a supply fan is fixedly installed inside the air supply frame, an air inlet is provided on the side of the air supply frame away from the feed hood, and a side of the air supply frame close to the feed hood is set as an inclined surface, and an air supply outlet is provided in the middle of the inclined surface.

[0010] As a further solution of the present invention: a material holding arc plate is fixedly connected to the bottom of the air supply frame, and the bottom of the material holding arc plate is arranged corresponding to the top of the vibrating screen.

[0011] As a further solution of the present invention: an exhaust fan is fixedly connected to one side of the feed cover, and the air supply direction of the exhaust fan is toward the feed port.

[0012] As a further solution of the present invention: a heater is fixedly installed on one side of the top of the inner wall of the screening box close to the air inlet.

[0013] As a further solution of the present invention: the mounting frame is arranged at an angle, and a slag discharge plate is fixedly connected to the side of the mounting frame with a lower height, a slag discharge trough is opened in the middle of the slag discharge plate, a material receiving box is slidably installed on the inner wall of the slag discharge trough, a discharge plate is fixedly installed below the mounting frame, and a discharge conveyor belt is rotatably installed on the top of the discharge plate.

[0014] As a further solution of the present invention: a plurality of positioning magnets are fixedly connected to the bottom edge of the rainproof tarpaulin.

[0015] As a further solution of the present invention: an air duct is fixedly connected to the inner wall of the rainproof tarpaulin, a plurality of supporting air pipes are fixedly connected to the middle of the air duct, and a shaping air pump is fixedly connected to one end of the air duct.

[0016] As a further solution of the present invention: a water retaining assembly is provided at the higher end of the mounting frame, the water retaining assembly includes a flip groove, a flip motor is fixedly installed on the inner wall of the flip groove, the output end of the flip motor is fixedly connected to the flip frame, a plurality of openings are opened on the top of the flip frame, a partition net is fixedly connected to the inner wall of the opening, a drain pipe is fixedly connected to one side of the bottom of the flip frame; one end of the drain pipe is fixedly connected to a drainage pump.

[0017] As a further solution of the present invention: an air jet is fixedly connected to the other side of the bottom of the turnover frame, a one-way valve is fixedly installed in the middle of the air jet, and one end of the air jet is fixedly connected to an air pump.

[0018] As a further solution of the present invention: the top height of the support frame is higher than the top height of the mounting frame, the top of the movable frame is slidably connected to an extension rod, and the top of the extension rod is fixedly connected to one end of the rainproof tarpaulin.

[0019] Compared with the prior art, the present invention has the following advantages: by providing a covering device, the present invention utilizes a traction assembly to drive the tarpaulin assembly to automatically retract and extend, thereby achieving automatic covering of the device, providing a cover and protection for the device during rainfall, and preventing the mechanical structure of the device from aging and rusting; at the same time, it avoids the slow covering speed caused by manual covering operations and the safety issues caused by people climbing high;

[0020] The present invention comprises two traction units at different positions that alternately perform traction and retraction actions, thereby traction-moving the rainproof tarpaulin and realizing the unfolding and retraction of the rainproof tarpaulin. By arranging the upper part of the movable frame as a slidable extension rod, the movable frame can automatically lift up under the traction action of the traction unit, thereby assisting in lifting and traction of the rainproof tarpaulin and achieving stable coverage of cleaning screens of different shapes. By distributing multiple groups of steel wire ropes, the force applied to the movable frame during the traction and displacement process is made more uniform and stable, thereby avoiding the problem of tilting or tearing of the rainproof tarpaulin caused by the tilting force at a single point.

[0021] The present invention fixes the bottom edge of the rainproof tarpaulin with a plurality of positioning magnets, and fixes the positioning magnets to the bottom of both sides of the base by adsorption, so that the bottom edge of the rainproof tarpaulin can be stably fitted with the side edges of the base, reducing the airflow from the sides, and avoiding the problem that the rainproof tarpaulin is easily torn and displaced due to the swing of the airflow. An air guide tube is fixedly connected to the inner wall of the rainproof tarpaulin. Air is supplied to the air guide tube by a shaping air pump, and air is ventilated to the supporting air tube, so that the air guide tube is stretched and upright, thereby supporting the rainproof tarpaulin and maintaining the stable posture of the rainproof tarpaulin after it is unfolded.

[0022] The present invention achieves the following effects by arranging an air supply component in the screening box and blowing air in the direction of the feed hood: on the one hand, when the screening work is normally carried out, the air flow sent by the air supply component can blow out the lighter impurities at the top that are separated by vibration, and move them in the direction of the feed hood, thereby separating them from the grain and improving the cleaning effect of the stored grain; on the other hand, when it rains, by blowing air in the direction of the feed hood, the air inlet can generate an air flow that is blown outward, thereby reducing the falling of rainwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A perspective view of the present invention;

[0024] Figure 2 is a cross-sectional view of the screening box of the present invention;

[0025] Figure 3 Schematic diagram of the internal structure of the screening box of the present invention;

[0026] Figure 4 is a cross-sectional schematic diagram of the air supply assembly of the present invention;

[0027] Figure 5 Schematic cross-sectional view of the water retaining assembly of the present invention;

[0028] Figure 6 This is a schematic diagram of the unfolded state of the covering device of the present invention;

[0029] Figure 7 This is a schematic diagram of the internal structure of the rainproof tarpaulin of the present invention;

[0030] Figure 8 The figure is a schematic structural diagram of a movable frame according to the present invention.

[0031] Description of reference numerals:

[0032] 101. Screening box; 102. Mounting frame; 103. Vibrating screen; 104. Feed hood; 105. Air supply assembly; 1051. Air supply frame; 1052. Air supply fan; 1053. Air supply port; 1054. Air inlet; 1055. Pressing arc plate; 106. Water retaining assembly; 1061. Turning frame; 1062. Through port; 1063. Screen; 1064. Turning motor; 1065. Jet pipe; 1066. Drain pump; 1067. One-way valve; 107. Heater; 108. Receiving box ;109. Unloading conveyor belt;110. Exhaust fan;111. Feed port;112. Base;2. Covering device;201. Fixed frame;202. Movable frame;203. Rainproof tarpaulin;204. Sliding frame;205. Shielding frame;206. Positioning magnet;207. Support air pipe;208. Air guide pipe;209. Extension rod;210. Traction unit;211. Reducer motor;212. Winding drum;213. Wire rope;214. Receiving frame;215. Support frame;216. Transmission rod. DETAILED DESCRIPTION

[0033] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0034] like Figures 1 to 2 As shown, a grain storage cleaning screen provided by an embodiment of the present invention includes a screening box 101, one end of the screening box 101 is tilted upward and fixedly connected to a feed cover 104, a feed port 111 is opened on one side of the feed cover 104, the interior of the screening box 101 is fixedly connected to a mounting frame 102, a vibrating screen 103 is fixedly installed in the middle of the mounting frame 102, an air supply component 105 is provided above the vibrating screen 103, and the air supply direction of the air supply component 105 is toward the feed cover 104; the present application arranges an air supply component 105 in the screening box 101 to clean the grain storage, and the grain storage screen 103 is cleaned by the air supply component 105. Component 105, by blowing air in the direction of the feed cover 104, achieves the following effects: on the one hand, during normal screening work, the air flow sent by the air supply component 105 can blow out the lighter impurities separated by vibration and located above, causing them to move in the direction of the feed cover 104, thereby separating them from the grain and improving the cleaning effect of the stored grain; on the other hand, when it rains, by blowing air in the direction of the feed cover 104, the air inlet 1054 can generate an outward blowing and exhausting air flow, thereby reducing the ingress of rainwater;

[0035] In one embodiment, see Figure 2 In order to assist in achieving this effect and effectively discharge the separated impurities, the present application has an exhaust fan 110 fixedly connected to one side of the feed hood 104. The air supply direction of the exhaust fan 110 is toward the feed port 111. Through the blowing of the exhaust fan 110, the air flow speed delivered from the air inlet 1054 is increased, thereby accelerating the discharge efficiency of impurities.

[0036] In one embodiment, see Figure 4 The air supply component 105 includes an air supply frame 1051. A gap is provided between the bottom of the air supply frame 1051 and the top of the vibrating screen 103 for allowing grain to pass through. A supply fan 1052 is fixedly installed inside the air supply frame 1051. An air inlet 1054 is provided on the side of the air supply frame 1051 away from the feed cover 104. The side of the air supply frame 1051 close to the feed cover 104 is set as an inclined surface, and an air supply port 1053 is provided in the middle of the inclined surface. The existence of the air supply frame 1051 is used to block the grain, so that the grain can be tumbled and shifted by contact with the air supply frame 1051 during the process of tilting and falling, which is convenient for separating internal impurities and improving the screening uniformity of the grain.

[0037] In one embodiment, see Figure 3 and Figure 4 The bottom of the air supply frame 1051 is fixedly connected with a pressing arc plate 1055, and the bottom of the pressing arc plate 1055 is arranged corresponding to the top of the vibrating screen 103. The pressing operation of the pressing arc plate 1055 allows the grain to be in stable contact with the vibrating screen 103. At the same time, the pressing arc plate 1055 blocks the grain, limits the amount of grain passing through, and makes the discharge speed of the vibrating screen 103 more uniform.

[0038] In one embodiment, see Figure 2 A heater 107 is fixedly installed on one side of the top of the inner wall of the screening box 101 near the air inlet 1054. By setting the heater 107, the air supply temperature of the air supply component 105 is increased, which assists in dehydrating and drying the grain, avoids the influence of rain or excessive air humidity on the moisture content of the grain, and ensures that the grain is dry and clean when it is stored.

[0039] In one embodiment, see Figure 1 In order to cover and protect the device during rainfall and prevent the mechanical structure of the device from aging and rusting, a base 112 is provided under the screening box 101. A covering device 2 is fixedly installed on the side of the base 112. The covering device 2 includes a tarpaulin assembly for covering the cleaning screen and a traction assembly for towing the tarpaulin assembly to move. The traction assembly is used to drive the tarpaulin assembly to automatically retract and move, thereby realizing automatic covering of the device, avoiding the slow covering speed caused by manual covering operation and the safety problems caused by people climbing up.

[0040] In one embodiment, the tarpaulin assembly includes a fixed frame 201, the bottom of the fixed frame 201 is fixedly connected to the base 112, a movable frame 202 is provided on one side of the fixed frame 201, and a sliding frame 204 is fixedly connected to the middle of both sides of the base 112. The two sides of the bottom of the movable frame 202 are respectively slidably connected to the two sliding frames 204, and a rainproof tarpaulin 203 is fixedly connected between the fixed frame 201 and the movable frame 202. By sliding the movable frame 202 and utilizing the limit of the sliding frame 204, the movable frame 202 can be stably unfolded and retracted under the action of the traction assembly.

[0041] In one embodiment, the top height of the support frame 215 is higher than the top height of the mounting frame 102. The top of the movable frame 202 is slidably connected to an extension rod 209. The top of the extension rod 209 is fixedly connected to one end of the rainproof tarpaulin 203. Due to the mechanical structure of the cleaning screen, one end (such as the feed end) may be higher than the other end (the discharge end). Therefore, in order to ensure that the rainproof tarpaulin 203 can stably cover cleaning screens of different volumes and shapes, please refer to Figure 8 In this application, the upper part of the movable frame 202 is set as a slidable extension rod 209, so that it can automatically lift up under the traction of the traction unit 210, thereby assisting in lifting and traction of the rainproof tarpaulin 203.

[0042] In one embodiment, in order to realize the installation of the traction assembly, one end of the screening box 101 is fixedly connected to the material receiving rack 214, and the end of the base 112 close to the feed cover 104 is fixedly connected to the support frame 215. The traction assembly includes two traction units 210, and the two traction units 210 are respectively fixedly installed on the top of the material receiving rack 214 and the support frame 215. The traction units 210 at two different positions alternately perform traction and retraction actions to pull the rainproof tarpaulin 203 to move, thereby realizing the deployment and retraction of the rainproof tarpaulin 203.

[0043] In one embodiment, see Figure 1 The traction unit 210 is used to pull the movable frame 202 for displacement. Its specific structure can be implemented with reference to the existing technical means. This embodiment provides a feasible technical solution: the traction unit 210 includes a reduction motor 211, and the output end of the reduction motor 211 is fixedly connected to a transmission rod 216. The middle part of the transmission rod 216 is fixedly connected to a number of equally distributed winding drums 212, and the middle parts of the several winding drums 212 are fixedly connected to steel wire ropes 213. One end of the several steel wire ropes 213 is fixedly connected to the movable frame 202. By dispersing multiple groups of steel wire ropes 213, the force on the movable frame 202 during the traction and displacement process is more uniform and stable, avoiding the problem of tilting or tearing of the rainproof tarpaulin 203 caused by the force tilt at a single point.

[0044] In one embodiment, see Figure 6 and Figure 7 In order to improve the stability of the rainproof tarpaulin 203 under severe weather conditions such as strong winds, a plurality of positioning magnets 206 are fixedly connected to the bottom edge of the rainproof tarpaulin 203. The positioning magnets 206 are adsorbed and fixed to the bottom of the two sides of the base 112, so that the bottom edge of the rainproof tarpaulin 203 can be stably fitted with the side of the base 112, reducing the airflow from the side and avoiding the problem of the rainproof tarpaulin 203 swinging due to the airflow, which may cause the rainproof tarpaulin 203 to be easily torn and displaced.

[0045] In one embodiment, in order to further improve the overall wind resistance of the tarpaulin assembly, an air duct 208 is fixedly connected to the inner wall of the rainproof tarpaulin 203, and a plurality of supporting air ducts 207 are fixedly connected to the middle of the air duct 208. The air duct 208 and the plurality of supporting air ducts 207 are both hoses, and the supporting air ducts 207 are arranged in an inverted U shape to provide support for the rainproof tarpaulin 203. A shaping air pump is fixedly connected to one end of the air duct 208, and air is supplied to the air duct 208 through the shaping air pump, and the supporting air ducts 207 are ventilated to make them tense and upright, thereby supporting the rainproof tarpaulin 203 and maintaining the stability of the posture of the rainproof tarpaulin 203 after it is unfolded.

[0046] In one embodiment, see Figure 3 and Figure 5 1063 is fixedly connected to the bottom side of the tilting frame 1061; one end of the drain pipe is fixedly connected to the drain pump 1066; by setting the tilting frame 1061, it is tilted when water needs to be blocked, and the water flow entering the screening box 101 is collected and guided by the through opening 1062 on the tilting frame 1061, and then discharged by the cooperation of the drain pipe and the drain pump 1066.

[0047] In one embodiment, see Figure 5In order to facilitate the stirring and shifting of the grain and achieve more thorough and effective cleaning of impurities inside the grain, an air jet pipe 1065 is fixedly connected to the other side of the bottom of the turning frame 1061, and a one-way valve 1067 is fixedly installed in the middle of the air jet pipe 1065. The conduction direction of the one-way valve 1067 is toward the inner cavity of the turning frame 1061. One end of the air jet pipe 1065 is fixedly connected to an air pump. By combining the air pump and the air pipe, air is sent to the bottom layer of the grain through the port 1062 on the turning frame 1061, driving the upper and lower layers of the grain to turn over, thereby assisting in the blowing and separation of impurities contained in the grain.

[0048] In one embodiment, see Figure 6 In order to protect the position of the discharge port, a shielding frame 205 is rotatably connected to the side of the fixed frame 201 away from the movable frame 202, and a curtain is fixedly connected between the shielding frame 205 and the fixed frame 201. The shielding frame 205 can be opened by rotating, and the curtain is opened to protect the discharge port.

[0049] In one embodiment, see Figure 2 In order to realize the centralized collection and discharge of the impurities and residues obtained by cleaning, the mounting frame 102 is tilted, and a slag plate is fixedly connected to the lower side of the mounting frame 102, and a slag trough is provided in the middle of the slag plate. A receiving box 108 is slidably installed on the inner wall of the slag trough, and a slot is provided at the end of the receiving box 108 corresponding to the shell of the screening box 101, so as to facilitate the removal operation of the receiving box 108; a discharge plate is fixedly installed at the bottom of the mounting frame 102, and a discharge conveyor belt 109 is rotatably installed on the top of the discharge plate to realize the discharge and transportation of the screened grain.

[0050] When the present invention is in use, when grain is being stored for cleaning, the grain to be cleaned is fed in from the feed port 111 by an external conveying mechanism, and is received by the mounting frame 102 and gradually guided. At this time, the air pump is started to send out air through the spray pipe, and the air is sent out through the plurality of openings 1062 on the turning frame 1061, thereby stirring the grain and assisting in separating impurities mixed in the grain.

[0051] The grain then slides down along the mounting frame 102 and moves onto the vibrating screen 103, where the separation of grain and impurities is completed through the operation of the vibrating screen 103. The grain passes through the vibrating screen 103 and falls onto the unloading conveyor belt 109. The rotation of the unloading conveyor belt 109 delivers the grain, and the impurities remaining on the vibrating screen 103 slide along the mounting frame 102 and move to the receiving plate, where they are received by the receiving box 108. After working for a period of time, the receiving box 108 is manually slid out to realize the slag discharge and cleaning operation. During the screening process, the supply fan 1052 and the exhaust fan 110 can be started to generate a blowing airflow inside the screening box 101, which blows the dust and impurities raised during the screening process toward the feeding port 111, thereby realizing the real-time delivery of light impurities.

[0052] When it rains, the traction unit 210 on the support frame 215 works, that is, the reduction motor 211 is started to drive the transmission rod 216 and several winding drums 212 to rotate, drive the steel wire to be wound, and then pull the movable frame 202 to move, so as to realize the automatic unfolding of the rainproof tarpaulin 203. The rainproof tarpaulin 203 is used to cover the entire screening machine. During the process of unfolding the rainproof tarpaulin 203, the positioning magnets 206 at various positions follow the movement of the tarpaulin to unfold, thereby realizing the limit fixation of the bottom edge of the tarpaulin and the side of the base 112. Then, the shaping air pump is started to supply air to the air guide pipe 208 and ventilate the supporting air pipe 207 to make it tense and stand up, thereby supporting the rainproof tarpaulin 203 and maintaining the stability of the posture of the rainproof tarpaulin 203 after unfolding.

[0053] Then, the flip motor 1064 drives the flip frame 1061 to rotate and tilt, and the flip frame 1061 is used to block the water flow into the screening box 101. The opening 1062 on the flip frame 1061 collects and guides the water flow into the screening box 101, and then the drain pipe and the drainage pump 1066 work together to discharge it.

[0054] The above disclosures are only a few specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A cleaning screen for grain storage, characterized in that: The invention comprises a screening box (101), one end of which is tilted upward and fixedly connected to a feed cover (104), a feed port (111) is provided on one side of the feed cover (104), a mounting frame (102) is fixedly connected to the interior of the screening box (101), a vibrating screen (103) is fixedly mounted in the middle of the mounting frame (102), an air supply assembly (105) is arranged above the vibrating screen (103), and the air supply direction of the air supply assembly (105) is toward the feed cover (104); a base (112) is arranged below the screening box (101), a covering device (2) is fixedly mounted on the side of the base (112), and the covering device (2) comprises a tarpaulin assembly for covering the cleaning screen and a traction assembly for traction of the tarpaulin assembly.

2. A grain storage cleaning screen as claimed in claim 1, characterized in that: The tarpaulin assembly comprises a fixed frame (201), the bottom of the fixed frame (201) is fixedly connected to the base (112), a movable frame (202) is provided on one side of the fixed frame (201), the middle parts of both sides of the base (112) are fixedly connected to sliding frames (204), the two sides of the bottom of the movable frame (202) are respectively slidably connected to the two sliding frames (204), and a rainproof tarpaulin (203) is fixedly connected between the fixed frame (201) and the movable frame (202).

3. A grain storage cleaning screen as claimed in claim 1, characterized in that: One end of the screening box (101) is fixedly connected to a material receiving frame (214), and one end of the base (112) close to the feed cover (104) is fixedly connected to a support frame (215). The traction assembly includes two traction units (210), and the two traction units (210) are fixedly installed on the top of the material receiving frame (214) and the support frame (215), respectively. The traction unit (210) includes a reduction motor (211), and the output end of the reduction motor (211) is fixedly connected to a transmission rod (216). The middle part of the transmission rod (216) is fixedly connected to a winding drum (212), and the middle part of the winding drum (212) is fixedly connected to a steel wire rope (213). One end of the steel wire rope (213) is fixedly connected to the movable frame (202).

4. A grain storage cleaning screen as claimed in claim 1, characterized in that: The air supply assembly (105) comprises an air supply frame (1051), a supply fan (1052) is fixedly installed inside the air supply frame (1051), an air inlet (1054) is provided on the side of the air supply frame (1051) away from the feed cover (104), a side of the air supply frame (1051) close to the feed cover (104) is set as an inclined surface, and an air supply port (1053) is provided in the middle of the inclined surface, and a heater (107) is fixedly installed on the side of the top of the inner wall of the screening box (101) close to the air inlet (1054); and a heater (107) is fixedly installed on the side of the top of the inner wall of the screening box (101) close to the air inlet (1054).

5. A grain storage cleaning screen as claimed in claim 2, characterized in that: A plurality of positioning magnets (206) are fixedly connected to the bottom edge of the rainproof tarpaulin (203).

6. A grain storage cleaning screen as claimed in claim 2, characterized in that: An air guide tube (208) is fixedly connected to the inner wall of the rainproof tarpaulin (203), a plurality of supporting air tubes (207) are fixedly connected to the middle of the air guide tube (208), and one end of the air guide tube (208) is fixedly connected to a shaping air pump.

7. A grain storage cleaning screen as claimed in claim 1, characterized in that: A water retaining assembly (106) is provided at the higher end of the mounting frame (102), the water retaining assembly (106) comprising a turning groove, a turning motor (1064) being fixedly mounted on the inner wall of the turning groove, an output end of the turning motor (1064) being fixedly connected to a turning frame (1061), a plurality of openings (1062) being provided on the top of the turning frame (1061), a partition net (1063) being fixedly connected to the inner wall of the opening (1062), a drain pipe being fixedly connected to one side of the bottom of the turning frame (1061), and a drainage pump (1066) being fixedly connected to one end of the drainage pipe.

8. A grain storage cleaning screen as claimed in claim 7, characterized in that: The other side of the bottom of the turning frame (1061) is fixedly connected to an air jet pipe (1065), a one-way valve (1067) is fixedly installed in the middle of the air jet pipe (1065), and one end of the air jet pipe (1065) is fixedly connected to an air pump.

9. A grain storage cleaning screen as claimed in claim 4, characterized in that: The bottom of the air supply frame (1051) is fixedly connected to a material pressing arc plate (1055), and the bottom of the material pressing arc plate (1055) is arranged corresponding to the top of the vibrating screen (103).

10. A grain storage cleaning screen as claimed in claim 1, characterized in that: The mounting frame (102) is tilted, and a slag plate is fixedly connected to a lower side of the mounting frame (102). A slag trough is provided in the middle of the slag plate, and a material receiving box (108) is slidably mounted on the inner wall of the slag trough.

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