Grain cooling and conveying device

Abstract

The invention relates to the technical field of grain conveying, in particular to a grain cooling and conveying device which comprises a pipe chain conveyor composed of a closed pipeline, a metal chain and a disc scraper, the metal chain is arranged in the pipeline to move and drives materials to move through the disc scraper, and a round seat is arranged at the center of the disc scraper. According to the grain cooling and conveying device, the disc scrapers can form gaps through deflection of the core seat, cavities are formed in the bottoms of hardened materials through pipe wall friction force, the hardened materials collapse and loosen, and the problems of material hardening and blocking in the conveying process can be solved without an additional crushing device; the restraining effect of the reset spring ensures that the disc scraper blade keeps vertical stable pushing when the loose materials are conveyed, the reliability of hardening treatment and conventional conveying is considered, the grain conveying efficiency is effectively improved, the folding support is driven to be linked with the balance ring through temperature sensing of the bimetallic strip, the disc scraper blade automatically rotates due to unbalance, and the conveying efficiency is improved. And the material piles which are not completely cooled are scattered by the convex edges, and meanwhile, heat dissipation of the material piles is realized.

Description

Technical Field

[0001] This invention relates to the field of grain conveying technology, specifically to a grain cooling and conveying device. Background Technology

[0002] After harvesting, grains undergo multiple processing stages, including drying, cooling, conveying, and storage. Among these, the conveying stage after cooling directly impacts the quality of stored grain and the efficiency of transport. Currently, grain conveying primarily utilizes equipment such as tubular chain conveyors and belt conveyors, which, while enabling continuous transport, still present several unresolved issues in practical applications.

[0003] First, grains may clump after cooling due to uneven moisture distribution or incomplete cooling. Especially in large-scale conveying scenarios, clumped materials have poor flowability and concentrated weight, making them prone to accumulating and clogging in conveying pipelines. This not only leads to conveying interruptions but may also cause wear and tear on equipment parts and grain crushing losses due to forced conveying. Existing conveying devices lack adaptive loosening functions for clumped materials, requiring manual shutdown for cleaning, which seriously affects operational efficiency.

[0004] Secondly, some grains do not reach the preset cooling standard in the pre-cooling process. If the high-temperature grains are still transported in the form of dense piles after entering the conveying stage, the heat is difficult to dissipate, which can easily lead to local heat accumulation, resulting in grain mold and clumping, and increasing the risk of subsequent storage. The existing conveying device only undertakes the simple function of conveying and cannot perform secondary heat dissipation treatment on grains that have not been fully cooled. It also lacks a corresponding status feedback mechanism, making it difficult to avoid quality hazards in advance.

[0005] Furthermore, traditional conveying devices have poor sealing performance, which can easily lead to dust leakage during the conveying process, causing grain loss and environmental pollution. At the same time, existing equipment lacks real-time early warning capabilities for abnormal conditions such as inadequate cooling and material caking during the conveying process. As a result, it is difficult for staff to detect and adjust the operation process in time, which can lead to the problem escalating and affect the overall production efficiency and grain quality.

[0006] In addition, during long-term use, the joints between the scraper and the chain and pipe of the tubular chain conveyor are prone to wear due to friction. Furthermore, the traditional scraper structure is fixed, making it difficult to balance the stable conveying of loose materials with adaptive adjustment under special working conditions, resulting in increased equipment maintenance costs and shortened service life.

[0007] In view of this, we propose a grain cooling and conveying device that combines adaptive loose and compacted materials, secondary cooling and heat dissipation, and early warning of abnormal working conditions. Summary of the Invention

[0008] The purpose of this invention is to provide a grain cooling and conveying device to solve the problems of low grain conveying efficiency, difficulty in quality control, and high maintenance costs mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: a grain cooling and conveying device, comprising a tubular chain conveyor consisting of a sealed pipe, a metal chain, and a disc scraper, wherein the metal chain moves within the pipe and the disc scraper drives the material to move;

[0009] A circular seat is provided at the center of the disc scraper, and a through groove is provided on the circular seat. A core seat with a shaft is provided in the through groove. A metal chain is fixedly connected to the core seat. The disc scraper is rotatably connected to the core seat through the through groove. An oblique opening is provided at both sides of the through groove to limit the rotation angle of the disc scraper.

[0010] The oblique opening is provided with a groove, and a reset spring is provided in the groove to constrain the position of the disc scraper.

[0011] Preferably, the outer ring of the circular base is provided with an annular groove, and the disc scraper is provided with an annular structure and is rotatable along the annular groove;

[0012] The back surface of the disc scraper is provided with a balance ring, and the balance ring and the disc scraper are kept coaxially connected by an elastic rope.

[0013] The back surface of the disc scraper has two grooves facing each other. A bimetallic strip is fixedly installed in the grooves, and a folding bracket is fixedly installed at the free end of the bimetallic strip. When the folding bracket is located on the upper side of the disc scraper, it is folded into the groove and does not contact the balance ring. When the folding bracket is located on the lower side of the disc scraper, it is unfolded and engages with the balance ring.

[0014] The material-facing surface of the disc scraper is fixedly provided with several protruding ridges.

[0015] Preferably, the disc scraper has mounting openings on both the upper and lower sides, and a thermoelectric generator is fixedly installed in the mounting opening. The two sides of the thermoelectric generator are located on the back surface and the front surface of the disc scraper, respectively, and the thermoelectric generator is connected to a sensor.

[0016] Preferably, the reset spring is a torsion spring, and the two ends of the torsion spring abut against the inner wall of the inclined opening and the side wall of the through groove of the disc scraper, respectively.

[0017] Preferably, the protruding ridges are evenly distributed radially along the material-facing surface of the disc scraper, and the ends of the protruding ridges are provided with a rounded transition structure.

[0018] Preferably, the elastic rope is a stainless steel wire core polyurethane elastic rope, and four elastic ropes are evenly arranged along the circumference of the balance ring.

[0019] Preferably, the outer surface of the thermoelectric generator is covered with a high-temperature resistant insulating coating, and a protective cover plate flush with the disc scraper is provided at the mounting port.

[0020] Preferably, the mating surfaces of the round seat and the core seat are provided with a grease layer, and the inner wall of the through groove is provided with a polytetrafluoroethylene wear-resistant bushing.

[0021] A grain cooling and conveying device includes the following steps:

[0022] S1. Start the tubular chain conveyor so that the metal chain moves in a circular motion along the preset track inside the closed pipe. The metal chain drives the disc scraper to move synchronously through the core seat, contacting the grain material on the material surface and driving the material to be conveyed along the direction of the pipe.

[0023] S2. During the conveying process, loose grains naturally accumulate along the disc scraper towards the material surface, forming a sloping pile. The differential resistance between the upper and lower materials keeps the disc scraper in a vertical state, continuously and stably pushing the material forward. If caking material is encountered, the caking material gathers at the bottom of the pipe and applies concentrated resistance to the lower side of the disc scraper, causing the disc scraper to deflect slightly along the core seat against the spring force of the return spring. A gap is formed between its bottom and the inner wall of the pipe. The loose material generated by the friction between the bottom of the caking material and the pipe wall leaks out from the gap, forming a cavity. After that, the caking material collapses and loosens in conjunction with the friction of the pipe wall.

[0024] S3. When the conveyed grain is not completely cooled, the high temperature of the material pile causes the temperature of the lower side of the disc scraper to rise, triggering the temperature-sensitive contraction of the bimetallic strip in the lower groove. The bimetallic strip pulls the folding bracket connected to its free end, and the folding bracket rotates out of the groove and unfolds horizontally under the assistance of gravity. The unfolded folding bracket engages with the balance ring. At this time, the folding bracket on the upper side of the disc scraper is on the upper side and rotates into the groove to fold under the action of gravity. The upper bimetallic strip is at room temperature and does not contract, and does not contact the balance ring. The unfolded folding bracket pulls the balance ring upward through the contraction force of the bimetallic strip, making the disc scraper unbalanced with the upper part heavy and the lower part light. During the movement, it rotates 180° along the annular groove of the circular seat. The convex edge of the material surface disperses the material pile with the rotation, while promoting heat dissipation and cooling of the material pile, and further assisting in dispersing the residual caking material.

[0025] S4. After the disc scraper rotates, the original lower side switches to the upper side. The bimetallic strip on this side moves away from the high-temperature material pile, returns to normal temperature, and extends. The folding bracket rotates into the groove and folds under the action of gravity. The original upper side switches to the lower side. If the material is still not completely cooled, the bimetallic strip on this side senses the temperature and contracts, pulling the folding bracket to unfold, continuing to maintain the rotating and dispersing action of the disc scraper. If the material temperature returns to normal, the bimetallic strip does not contract. The folding bracket remains folded, and the return spring drives the disc scraper to return to the vertical position, repeating the conveying process.

[0026] S5. During the heating process of the high-temperature material pile, the thermoelectric generator on the underside of the disc scraper generates current due to the temperature difference between the material surface (in contact with high-temperature materials) and the back material surface (in contact with the normal temperature environment inside the pipe). The current triggers the connected sensor to send a signal, prompting the staff that there is an abnormality in the pre-cooling process so that the operation process can be rectified in time.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1. Adapts to loosening compacted materials, resulting in strong conveying stability:

[0029] The disc scraper can create a gap by deflecting the core seat, and use the friction of the tube wall to create a cavity at the bottom of the caking material and cause it to collapse and loosen. This solves the problem of material caking and blockage during the conveying process without the need for an additional crushing device. The restraining effect of the return spring ensures that the disc scraper maintains vertical stability during the conveying of loose materials, taking into account both the reliability of caking treatment and conventional conveying, and effectively improving the efficiency of grain conveying.

[0030] 2. Intelligent dispersal of undried materials optimizes cooling effect:

[0031] The bimetallic strip temperature-sensing drive folding bracket is linked with the balance ring, causing the disc scraper to rotate automatically due to imbalance. The convex edges break up the uncooled material pile, while simultaneously dissipating heat from the pile. The gravity-assisted unfolding / folding switching of the folding bracket, combined with the rotation cycle of the disc scraper, continuously breaks up the high-temperature material pile, preventing local heat accumulation from affecting the cooling quality of the grain and reducing the risk of mold growth during subsequent storage.

[0032] 3. Real-time early warning of abnormal operating conditions, ensuring high controllability of the work process:

[0033] The thermoelectric generator integrated in the disc scraper generates electricity based on the temperature difference between the material pile and the pipeline environment, triggering sensor alarms and providing real-time feedback on abnormal states in the pre-cooling process, facilitating timely rectification by staff. It can achieve early warning function without external power supply, has a simple structure and low energy consumption, improves the intelligence level and operational safety of the entire conveying system, and reduces material loss caused by insufficient cooling. Attached Figure Description

[0034] Figure 1 This is a partial three-dimensional structural diagram of the pipe and metal chain of the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of the metal chain and the disc scraper of the present invention;

[0036] Figure 3 This is a three-dimensional structural diagram of the disc scraper facing the material surface according to the present invention;

[0037] Figure 4 This is a three-dimensional structural diagram of the back surface of the disc scraper of the present invention;

[0038] Figure 5 This is an exploded view of the disc scraper and bimetallic strip of the present invention;

[0039] Figure 6 This is an exploded view of the circular base and the core base of the present invention;

[0040] Figure 7 This is a three-dimensional structural cross-sectional view of the disc scraper and core seat of the present invention;

[0041] Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle;

[0042] Figure 9 This is a side sectional view of the core base and oblique opening of the present invention.

[0043] In the diagram: 1. Pipe; 2. Metal chain; 3. Disc scraper; 4. Round seat; 5. Through groove; 6. Core seat; 7. Angled opening; 8. Embedded groove; 9. Return spring; 10. Ring groove; 11. Balance ring; 12. Elastic rope; 13. Groove; 14. Bimetallic strip; 15. Folding bracket; 16. Raised ridge; 17. Mounting port; 18. Thermoelectric generator; 19. Sensor. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Please see Figures 1 to 9 The present invention provides a technical solution: a grain cooling and conveying device, comprising a tube chain conveyor consisting of a sealed pipe 1, a metal chain 2, and a disc scraper 3. The metal chain 2 moves inside the pipe 1 and drives the material to move through the disc scraper 3. The pipe 1 is a continuous, seamless, sealed structure, which can effectively prevent dust leakage or external impurities from entering during grain conveying. The metal chain 2 is made of high-strength wear-resistant chain, and its links are fixedly connected to the core seat 6 by bolts to ensure transmission stability.

[0046] A circular seat 4 is provided at the center of the disc scraper 3, and a through groove 5 is provided on the circular seat 4. A core seat 6 with a shaft is provided in the through groove 5. The metal chain 2 is fixedly connected to the core seat 6. The disc scraper 3 is rotatably connected to the core seat 6 through the through groove 5. An inclined opening 7 is provided on both sides of the through groove 5 to limit the rotation angle of the disc scraper 3. The inclination angle of the inclined opening 7 is 15°-30°, which can limit the deflection angle of the disc scraper 3 within this range and avoid excessive deflection that could cause interruption of material conveying or damage to components.

[0047] A groove 8 is provided in the oblique opening 7, and a reset spring 9 is provided in the groove 8 to constrain the position of the disc scraper 3. The size of the groove 8 is adapted to the reset spring 9. One end of the reset spring 9 is embedded in the fixing hole at the bottom of the groove 8, and the other end abuts against the side wall of the disc scraper 3, ensuring that the reset spring 9 can stably provide reset elastic force after the disc scraper 3 deflects.

[0048] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the outer ring of the circular base 4 is provided with an annular groove 10, and the disc scraper 3 is designed as an annular structure and is rotated along the annular groove 10. The width of the annular groove 10 is slightly larger than the thickness of the disc scraper 3, and the inner wall of the annular groove 10 is provided with a wear-resistant pad to reduce the friction loss when the disc scraper 3 rotates. The contact surface between the inner ring surface of the disc scraper 3 and the annular groove 10 is polished to further reduce the rotational resistance.

[0049] The back surface of the disc scraper 3 is provided with a balance ring 11, and the balance ring 11 and the disc scraper 3 are kept coaxially connected by an elastic rope 12. The diameter of the balance ring 11 is smaller than the diameter of the disc scraper 3, and its material is a lightweight alloy. This can ensure the structural strength and the stability of the counterweight effect while avoiding additional load on the rotation of the disc scraper 3.

[0050] The back surface of the disc scraper 3 has two grooves 13 facing each other. A bimetallic strip 14 is fixedly installed in the groove 13, and a folding bracket 15 is fixedly installed at the free end of the bimetallic strip 14. When the folding bracket 15 is located on the upper side of the disc scraper 3, it is folded into the groove 13 and does not contact the balance ring 11. When the folding bracket 15 is located on the lower side of the disc scraper 3, it is unfolded and engages with the balance ring 11. The folding bracket 15 adopts a hinged structure, and the engagement point is provided with anti-slip protrusions to ensure a firm engagement with the balance ring 11. The fixed end of the bimetallic strip 14 is connected to the inner wall of the groove 13 by rivets to ensure the connection strength.

[0051] The disc scraper 3 has several protruding ridges 16 fixedly arranged on the material-facing surface. The protruding ridges 16 and the disc scraper 3 are integrally formed, which can effectively enhance the material-dispersing effect and at the same time prevent the protruding ridges 16 from breaking due to excessive force.

[0052] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9As shown, the disc scraper 3 has mounting openings 17 on both the upper and lower sides. A thermoelectric generator 18 is fixedly installed in the mounting opening 17. The two sides of the thermoelectric generator 18 are located on the back surface and the front surface of the disc scraper 3, respectively. The thermoelectric generator 18 is connected to a sensor 19. The edge of the mounting opening 17 is provided with a sealing ring to prevent grain debris or dust from entering the mounting opening 17 and affecting the operation of the thermoelectric generator 18. The sensor 19 is a temperature alarm sensor and is connected to the thermoelectric generator 18 through a wire. The wire is embedded in the wiring groove inside the disc scraper 3 to avoid the wire being exposed and damaged.

[0053] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the return spring 9 is a torsion spring, and the two ends of the torsion spring abut against the inner wall of the inclined opening 7 and the side wall of the through groove 5 of the disc scraper 3, respectively. The torsion spring is made of spring steel, which has good elastic recovery performance and can withstand the deflection force of the disc scraper 3 for a long time without fatigue failure.

[0054] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the protruding ribs 16 are evenly distributed radially along the material-facing surface of the disc scraper 3, and the ends of the protruding ribs 16 are designed with rounded transition structures to prevent the sharp tips of the protruding ribs 16 from scratching the inner wall of the pipe 1 or snagging the grains.

[0055] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the elastic rope 12 is a stainless steel wire core polyurethane elastic rope, and four elastic ropes 12 are evenly arranged along the circumference of the balance ring 11. The two ends of the elastic rope 12 are connected to the connecting ears of the balance ring 11 and the fixing seat of the disc scraper 3, respectively. The connection method is a snap-on type, which is convenient for later replacement and maintenance.

[0056] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the outer surface of the thermoelectric generator 18 is covered with a high-temperature resistant insulating coating. The coating material is polyimide, which can withstand temperatures below 150°C and has good insulation properties. The mounting port 17 is provided with a protective cover plate that is flush with the disc scraper 3. The protective cover plate is fixed by screws, and its surface is kept flat with the back / forward material surface of the disc scraper 3 to avoid protrusions affecting material conveying or the rotation of the disc scraper 3.

[0057] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the mating surfaces of the round seat 4 and the core seat 6 are provided with a grease layer. The grease is a high-temperature resistant lithium-based grease, which can maintain the lubrication effect for a long time and reduce the wear of the mating surfaces. The inner wall of the through groove 5 is provided with a polytetrafluoroethylene wear-resistant bushing. The bushing is embedded in the through groove 5 by interference fit and can directly contact the core seat 6, avoiding direct wear of the inner wall of the through groove 5 and extending the service life of the disc scraper 3.

[0058] A method of using a grain cooling and conveying device includes the following steps:

[0059] S1. Start the tubular chain conveyor, so that the metal chain 2 rotates and moves along the preset trajectory inside the sealed pipe 1. The metal chain 2 drives the disc scraper 3 to move synchronously through the core seat 6. The disc scraper 3 is kept in a vertical state under the initial pre-tension of the return spring 9. It fully contacts the grain material on the material surface and drives the material to be stably conveyed along the direction of the pipe 1. During the conveying process, the pipe 1 is kept in a sealed environment to prevent the grain from getting damp or contaminated.

[0060] S2. During the conveying process, loose grains naturally accumulate along the disc scraper 3 to form a sloping pile. The material on the upper side is lighter and the material on the lower side is heavier. The differential resistance keeps the disc scraper 3 in a vertical state, continuously and stably pushing the material forward. If the material is caking, the caking material, due to its large weight and poor fluidity, gathers at the bottom of the pipe 1 and applies concentrated resistance to the lower side of the disc scraper 3. This resistance is greater than the preload of the return spring 9, causing the disc scraper 3 to deflect slightly to one side along the core seat 6 against the elastic force of the return spring 9. A gap is formed between its bottom and the inner wall of the pipe 1. The loose material generated by the friction between the bottom of the caking material and the pipe wall leaks out from the gap. A cavity gradually forms below the caking material. The caking material above the cavity collapses under the action of gravity. Combined with the friction of the pipe wall, the caking material is further completely loosened. The loosened material re-enters the normal conveying process.

[0061] S3. When the conveyed grain is not completely cooled, the high-temperature pile of material continues to contact the material surface of the disc scraper 3, causing the temperature of the lower side of the disc scraper 3 to rise. The heat is transferred to the bimetallic strip 14 in the groove 13, triggering the bimetallic strip 14 to contract due to temperature. The bimetallic strip 14 pulls the folding bracket 15 connected to its free end. With the assistance of gravity, the folding bracket 15 overcomes the limiting resistance of the inner wall of the groove 13, rotates out of the groove 13, and unfolds horizontally. The end of the unfolded folding bracket 15 is precisely engaged with the slot of the balance ring 11. At this time, the folding bracket 15 on the upper side of the disc scraper 3 is positioned on the upper side and naturally rotates into the groove 13 under the action of gravity, folding upwards. When the bimetallic strip 14 is at room temperature, it does not retract, and the folding bracket 15 does not contact the balance ring 11. When the folding bracket 15 is unfolded, it pulls the balance ring 11 upward through the contraction force of the bimetallic strip 14, causing the center of gravity of the disc scraper 3 to shift upward, forming an unbalanced state with the top heavy and the bottom light. During the traction movement of the metal chain 2, the disc scraper 3 rotates 180° along the annular groove 10 of the circular seat 4. The protrusion 16 on the material surface cuts and breaks up the material pile as it rotates, increasing the contact area between the material pile and the air, promoting heat dissipation and cooling of the material pile. At the same time, the rotation of the protrusion 16 can further help to break up the residual caking material, ensuring that the material is cooled evenly.

[0062] S4. After the disc scraper 3 rotates, the original lower side (the unfolded folding bracket 15) switches to the upper side. As the bimetallic strip 14 moves away from the high-temperature material pile, its temperature gradually decreases and it returns to normal temperature. Under the action of gravity, the folding bracket 15 rotates into the groove 13 and folds, disengaging from the balance ring 11. The original upper side (the folded folding bracket 15) switches to the lower side. If the material is not completely cooled, the bimetallic strip 14 on this side continues to contract due to the influence of the high-temperature material pile and pulls the folding bracket 15 to unfold, continuously maintaining the rotating and dispersing action of the disc scraper 3. If the material temperature returns to normal, the bimetallic strip 14 does not contract, the folding bracket 15 remains folded, and the elastic force of the return spring 9 drives the disc scraper 3 to return to the vertical state, repeating the stable conveying process of S2 to ensure continuous and efficient material conveying.

[0063] S5. During the heating process of the high-temperature material pile, the thermoelectric generator 18 on the lower side of the disc scraper 3 contacts the high-temperature material on the material surface and contacts the room-temperature air in the pipe 1 on the material back surface, forming a stable temperature difference between the two sides. The thermoelectric generator 18 converts heat energy into electrical energy based on the Seebeck effect. The current is transmitted to the connected sensor 19. After receiving the current signal, the sensor 19 issues an audible and visual alarm signal to prompt the staff that there is an abnormality in the pre-cooling process, so as to check the operating status of the cooling equipment in time and adjust the cooling parameters to avoid the grain that has not been fully cooled entering the subsequent storage stage, which may lead to problems such as mold and clumping.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grain cooling and conveying device, characterized in that, The tube chain conveyor consists of a closed pipe (1), a metal chain (2) and a disc scraper (3), wherein the metal chain (2) is placed inside the pipe (1) and moves and the material is moved by the disc scraper (3); The disc scraper (3) has a circular seat (4) at its center. The circular seat (4) has a through groove (5). The through groove (5) has a core seat (6) with a shaft. The metal chain (2) is fixedly connected to the core seat (6). The disc scraper (3) is rotatably connected to the core seat (6) through the through groove (5). The grooves on both sides of the through groove (5) have oblique openings (7) to limit the rotation angle of the disc scraper (3). The oblique opening (7) is provided with a groove (8), and a reset spring (9) is provided in the groove (8) to constrain the position of the disc scraper (3).

2. The grain cooling and conveying device according to claim 1, characterized in that: The outer ring of the circular seat (4) is provided with an annular groove (10), and the disc scraper (3) is provided with an annular structure and is rotatably arranged along the annular groove (10); The back surface of the disc scraper (3) is provided with a balance ring (11), and the balance ring (11) and the disc scraper (3) are kept coaxially by an elastic rope (12); The disc scraper (3) has two grooves (13) facing each other on the back side. A bimetallic strip (14) is fixedly installed in the groove (13). A folding bracket (15) is fixedly installed at the free end of the bimetallic strip (14). When the folding bracket (15) is located on the upper side of the disc scraper (3), it is folded into the groove (13) and does not contact the balance ring (11). When it is located on the lower side, it is unfolded and engages with the balance ring (11). The disc scraper (3) is fixedly provided with several protruding ridges (16) on the material surface.

3. The grain cooling and conveying device according to claim 1, characterized in that: The disc scraper (3) has mounting openings (17) on both the upper and lower sides. A thermoelectric generator (18) is fixedly installed in the mounting opening (17). The two sides of the thermoelectric generator (18) are located on the back surface and the front surface of the disc scraper (3), respectively, and the thermoelectric generator (18) is connected to a sensor (19).

4. A grain cooling and conveying device according to claim 1, characterized in that: The reset spring (9) is a torsion spring, and the two ends of the torsion spring abut against the inner wall of the inclined opening (7) and the side wall of the through groove (5) of the disc scraper (3), respectively.

5. A grain cooling and conveying device according to claim 2, characterized in that: The protruding ridges (16) are evenly distributed radially along the disc scraper (3) towards the material surface, and the ends of the protruding ridges (16) are designed with a rounded transition structure.

6. A grain cooling and conveying device according to claim 2, characterized in that: The elastic rope (12) is a stainless steel wire core polyurethane elastic rope, and four elastic ropes (12) are evenly arranged around the balance ring (11).

7. A grain cooling and conveying device according to claim 3, characterized in that: The outer surface of the thermoelectric generator (18) is covered with a high-temperature resistant insulating coating, and a protective cover plate flush with the disc scraper (3) is provided at the mounting port (17).

8. A grain cooling and conveying device according to claim 1, characterized in that: The mating surfaces of the round seat (4) and the core seat (6) are provided with a grease layer, and the inner wall of the through groove (5) is provided with a polytetrafluoroethylene wear-resistant bushing.

Images