A device for spraying a spherical product surface

Abstract

The present application relates to the technical field of chemical equipment, in particular to a spherical product surface spraying device, which comprises a spraying assembly, an air nozzle for blowing and suspending the spherical product by cooling gas, and a nozzle for spraying anti-caking agent on the surface of the product at the same time; a material withdrawal assembly for taking away the spherical product after spraying and a material supply assembly for providing new spherical product to the spraying position are arranged on the side of the spraying assembly; the spherical chemical fertilizer product is blown and suspended by the air nozzle, and the anti-caking agent is sprayed on the surface of the product at the same time; the gas sprayed by the air nozzle can quickly dry the anti-caking agent on the surface of the product, ensuring that an intact anti-caking agent layer is formed on the surface of the product in the non-contact spraying process, thereby prolonging the shelf life of the product.

Description

Technical Field

[0001] This invention relates to the field of chemical equipment technology, specifically to a device for spraying coating the surface of spherical products. Background Technology

[0002] During fertilizer production, before packaging, the formed fertilizer granules are usually coated with an anti-caking agent to prevent clumping during storage and transportation. To ensure the anti-caking agent is evenly applied to the surface of the fertilizer granules, a sprayer is typically used. After the anti-caking agent dries, the granules are packaged.

[0003] The conventional method for spraying fertilizer granules involves cooling the granules after they have been formed, then pouring the cooled granules into a packaging kiln, where a sprayer is used to spray the surface of the granules. However, in actual operation, due to the temperature differences between the cooled fertilizer granules, the anti-caking agent on the surface of the cooler granules dries completely, while the anti-caking agent on the surface of the warmer granules remains slightly molten. This molten state makes the granules prone to sticking together, causing clumping of the fertilizer inside the packaging bag, affecting its preservation and use. To address this technical problem, Chinese Utility Model Patent CN217585034U discloses a particle cooling device for a compound fertilizer packaging kiln, specifically disclosing the following technical features: "The device includes a cooling component installed in the working chamber of the packaging kiln; the cooling component operates independently of the packaging kiln, and the cooling component receives the freely falling particles in the working chamber of the packaging kiln and cools the particles through heat conduction." The fertilizer granules are cooled by a cooling component, ensuring the anti-caking agent on the surface of the granules dries completely, thus preventing sticking. Because this existing technology effectively solves the problem of fertilizer granules sticking due to incomplete drying of the anti-caking agent, it has been widely adopted.

[0004] In conventional fertilizer production, fertilizer granules are typically less than 1 cm in diameter. These small-particle fertilizers dissolve quickly during application, allowing for rapid absorption of their active ingredients by crops. Because of this rapid dissolution, to prevent excess active ingredients from being lost to the soil, a timed and measured fertilization method is used. This avoids waste and meets the crop's fertilization requirements. While this method satisfies crop needs, frequent fertilization increases labor costs. Therefore, to reduce the frequency of fertilization, larger-particle fertilizers (greater than 1 cm) are produced. These larger-particle fertilizers can remain at the crop roots for extended periods, slowly dissolving and releasing nutrients, providing a continuous supply of nutrients. Large-particle fertilizers and their manufacturing methods are disclosed in Chinese patents CN104193525A, CN102766002B, CN104341237A, and CN101709018B. Some of these fertilizers have particle sizes of 5-12 cm. These large-particle fertilizers are placed at the roots of crops and dissolve slowly, which can reduce the number of fertilizations while still meeting the fertilizer requirements of crops.

[0005] The cooling methods described in the prior art are suitable for fertilizer granules with a diameter of less than 1 cm. Because these granules are relatively lightweight, their low inertia during tumbling in the packaging chamber prevents them from breaking due to collisions. However, when dealing with larger fertilizer granules, such as those with a diameter of 5 cm or more, their greater mass makes them highly susceptible to breakage during repeated tumbling. Furthermore, larger granules require more spraying and cooling time. If the anti-caking agent is not completely dry before the granules are fully dried, the tumbling of these larger granules can leave indentations, damaging the integrity of the anti-caking coating. This allows moisture to enter the granules through these indentations during storage, affecting the fertilizer's efficacy and shelf life. Therefore, this problem urgently needs to be addressed. Summary of the Invention

[0006] To avoid and overcome the technical problems existing in the prior art, the present invention provides a spherical product surface spraying device. The present invention uses an air nozzle to suspend spherical fertilizer products in mid-air while simultaneously spraying an anti-caking agent onto the product surface. The gas sprayed from the nozzle enables the anti-caking agent on the product surface to dry quickly, ensuring that a complete and undamaged anti-caking agent layer is formed on the product surface during the non-contact spraying process, thereby extending the product's shelf life.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A spherical product surface spraying device includes a spraying assembly, which is provided with a nozzle for blowing and suspending the spherical product by cooling gas and a nozzle for spraying an anti-caking agent onto the product surface at the same time; a material ejection assembly for removing the spherical product after spraying and a material feeding assembly for providing new spherical products to the spraying position are arranged on the side of the spraying assembly.

[0009] As a further embodiment of the present invention: the spraying assembly includes a spraying seat arranged on a base, a cavity with an open top formed in the spraying seat, a pressure plate dynamically sealed in the cavity, a sealed air pressure chamber formed between the pressure plate and the bottom of the cavity, an air pressure component arranged in the air pressure chamber to make the pressure plate reciprocate linearly in the vertical direction; an air nozzle communicating with the air pressure chamber and a nozzle connected to the sprayer are both arranged on the pressure plate, the spherical product falls into the cavity and is suspended above the air nozzle, and the spherical product can move upward synchronously with the pressure plate.

[0010] As a further embodiment of the present invention: a guide groove extending vertically in the longitudinal direction is arranged on the side wall of the cavity, and a guide block that slides with the guide groove is provided on the pressure plate; the pneumatic component includes a booster for pressurizing the pressure chamber to push the pressure plate upward, and a return spring for pulling the pressure plate downward; the pneumatic component also includes a pressure relief hole that connects the pressure chamber to the atmospheric environment when the pressure plate moves upward to a predetermined position, thereby causing the pressure chamber to depressurize instantaneously, the pressure relief hole is arranged on the cavity wall of the cavity, and the predetermined position is the position where the pressure plate rises when the unloading operation and the unloading operation are completed.

[0011] As a further embodiment of the present invention: a limiting plate is arranged at the opening of the cavity, and an air bladder is arranged at the bottom of the limiting plate, which can expand radially and centripetally under the upward squeezing action of the pressure plate. The air bladder is distributed in a ring shape in the cavity. After the coating is completed, the spherical product is pressed onto the opening of the expanded air bladder, and the diameter of the opening is smaller than the diameter of the spherical product.

[0012] As a further embodiment of the present invention: the ejector assembly includes a column arranged on a base, a pusher rod hinged to the column, a support seat arranged on the cantilever end of the pusher rod, and a crossbar that can only be bent downwards hinged to the support seat via a torsion spring seat; an ejector pry bar arranged on the ejector drive rod, which is spatially perpendicular to the crossbar, and the crossbar is located on the movement path of the ejector pry bar; the ejector pry bar moves upwards, and the crossbar moves along the length of the ejector pry bar, so that the cantilever end of the pusher rod rotates to the spherical product located on the airbag opening, and pushes the spherical product into the collection box; the ejector pry bar moves downwards after passing the crossbar, and the ejector pry bar presses down on the cantilever end of the crossbar, causing the crossbar to bend downwards and pass over the crossbar.

[0013] As a further embodiment of the present invention: the ejection drive rod further includes an ejection straight rod, the top end of which is provided with an L-shaped ejection curved rod, and an ejection pry bar is arranged on the ejection curved rod; the ejection straight rod is slidably inserted into a set of guide grooves in the vertical direction, and the bottom end of the ejection straight rod is fixedly connected to the guide block.

[0014] As a further embodiment of the present invention: the feeding assembly includes a storage box for storing single spherical products. The rectangular storage box has an inlet on its side and an outlet on its bottom. Symmetrically arranged feeding grooves extending along the length of the side frame are provided on both sides of the inlet, and a feeding slide rod is slidably connected in the feeding groove. Symmetrically arranged discharging grooves extending along the length of the side frame are provided on both sides of the discharging outlet, and a discharging slide rod is slidably connected in the discharging groove. A material carrier is connected between the discharging slide rod and the feeding slide rod. The driving component can pull the material carrier to move and cover the inlet or the discharging outlet, so that the discharging outlet is closed and the inlet is opened, or the inlet is closed and the discharging outlet is opened.

[0015] As a further embodiment of the present invention: the driving component includes a support column arranged on the side opposite to the feed port, and a tension spring is arranged between the two sets of support columns and the two ends of the discharge slide rod to pull the discharge slide rod to move away from the feed port; the driving component also includes a material picking driving rod that pushes the feed slide rod to move from bottom to top along the feed slide rod; a rotating shaft is arranged at the frame where the feed port and the discharge port intersect, and the material carrier cloth passes around the rotating shaft and is connected to the feed slide rod and the discharge slide rod.

[0016] As a further embodiment of the present invention: the material picking drive rod includes a material picking straight rod extending vertically, the material picking straight rod being slidably inserted into a set of guide grooves in the vertical direction, and the bottom end of the material picking straight rod being fixedly connected to the guide block; a material picking curved rod is connected to the material picking straight rod and inclined upwardly, the material picking curved rod being provided with a U-shaped material picking push rod extending vertically upward at both ends, the two ends of the material picking push rod being provided with locking slots that can engage with the two ends of the feeding slide rod, so that the material picking push rod pushes the feeding slide rod to move from bottom to top.

[0017] As a further embodiment of the present invention: the feeding assembly further includes a support frame, on which a storage bin is arranged. The bottom of the storage bin is connected to a feed pipe, and the outlet end of the feed pipe is connected to the inlet. A discharge chute is arranged below the outlet, on the material-receiving crank, and extends downward from the outlet to the airbag, so that the spherical product rolls to the spraying position.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This invention uses an air nozzle to suspend spherical fertilizer products in mid-air while simultaneously spraying an anti-caking agent onto the product surface. The gas sprayed from the nozzle allows the anti-caking agent on the product surface to dry quickly while simultaneously keeping the product suspended, thus serving a dual purpose. The suspended state of the spherical product ensures that a complete and undamaged anti-caking agent layer is formed on the product surface during the non-contact spraying process, thereby extending the product's shelf life.

[0020] 2. When waiting for material to be picked up, the tension spring pulls the discharge slide bar to the far left of the discharge chute, thus pulling the carrier cloth below the outlet to prevent spherical products in the storage box from falling out. When material needs to be picked up, the carrier cloth moves to the inlet under the action of the picking drive rod and blocks the inlet, preventing spherical products in the inlet pipe from rolling into the storage box; at the same time, it releases the sealing effect of the carrier cloth on the outlet, allowing the spherical products to fall smoothly. Through the reciprocating motion of the carrier cloth, the operation of blocking and dropping material is achieved, with a stable structure and ingenious design.

[0021] 3. The material feeding chute of this invention gradually rises and gets close to the discharge port during the material receiving process. It maintains a close distance to the discharge port when receiving materials, which can prevent spherical products from falling at a large speed and avoid damage to the spherical products.

[0022] 4. During the compression process, the airbag continuously expands. On one hand, it presses firmly against the air nozzle, increasing the pressure inside the air chamber and causing the pressure plate to rise continuously, thus completing the material unloading and reloading operations sequentially. On the other hand, after expansion, the airbag provides a temporary platform for the coated spherical product, further reducing the distance between the spherical product and the drop point on the unloading slide, thereby preventing the spherical product from breaking. At the same time, the slowly recovering airbag also provides a cushioning effect for the falling spherical product, preventing breakage before coating, improving product integrity, and enhancing the coating effect.

[0023] 5. The spraying process begins with starting the booster compressor to inflate the pressure chamber, slowly blowing up the spherical product. Pressure is then continuously increased until the spherical product is stably suspended in the air. At this point, the pressure is stabilized, and spraying begins on the stably suspended spherical product. After the designated spraying time, spraying stops, and the pressure is increased. The pressure plate rises, and the spherical product rises synchronously. The airbag is compressed and covers the air nozzle. During this process, the ejection and feeding components also begin their corresponding actions. When a new spherical product lands on the airbag, the pressure chamber depressurizes, the booster compressor stops working, the pressure plate resets, and a new round of spraying begins.

[0024] 6. The crossbar engages with a torsion spring seat and a support seat, allowing it to bend only downwards. This is to prevent the pusher from moving towards the newly fallen spherical product during the resetting process of the ejector pry bar, thus avoiding pushing the spherical product into the collection box and improving the controllability of the device. When the ejector pry bar moves downwards past the position of the crossbar, the crossbar is in a depressed state during the overtaking process. Afterwards, the crossbar and the ejector pry bar separate, the crossbar resets, and the next round of operation begins. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention.

[0026] Figure 2 This is a schematic diagram of the spraying assembly in this invention.

[0027] Figure 3 This is a schematic diagram showing the disassembled structure of the spraying component in this invention.

[0028] Figure 4 This is a schematic diagram of the internal structure of the spraying component in this invention.

[0029] Figure 5 This is a schematic diagram of the feeding assembly in this invention.

[0030] Figure 6 This is a schematic diagram showing the disassembled structure of the feeding component in this invention.

[0031] Figure 7 This is a schematic diagram of the storage box in this invention.

[0032] Figure 8 This is a schematic diagram of the material storage box during material feeding in this invention.

[0033] Figure 9 This is a schematic diagram of the material ejection assembly in this invention.

[0034] Figure 10 This is a schematic diagram showing the disassembled structure of the material ejection component in this invention.

[0035] Figure 11 This is a schematic diagram of the mating structure of the crossbar and the support base in this invention.

[0036] In the picture:

[0037] 10. Spraying assembly; 11. Base; 12. Spraying base; 121. Guide groove; 122. Pressure relief hole;

[0038] 13. Pressure plate; 131. Guide block; 132. Air nozzle; 133. Nozzle; 134. Return spring;

[0039] 14. Airbag; 15. Limiting plate; 16. Intensifier;

[0040] 20. Feeding assembly; 21. Picking drive rod; 211. Picking straight rod; 212. Picking curved rod;

[0041] 213. Material picking push rod; 2131. Barrel; 22. Material discharge slide; 23. Material storage box;

[0042] 231. Feed inlet; 232. Discharge outlet; 233. Feed chute; 234. Discharge chute;

[0043] 235. Feed slide bar; 236. Discharge slide bar; 237. Material carrier cloth; 238. Tension spring;

[0044] 239. Support column; 24. Feed pipe; 25. Storage bin; 26. Support frame;

[0045] 30. Unloading assembly; 31. Unloading drive rod; 311. Unloading straight rod; 312. Unloading curved rod;

[0046] 313. Unloading pry bar; 32. Column; 33. Push rod; 331. Support base; 332. Crossbar;

[0047] 34. Unloading chute; 35. Collection box. Detailed Implementation

[0048] 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.

[0049] Please see Figure 1-11 The present invention mainly includes a spraying component 10, a feeding component 20 and a unloading component 30.

[0050] like Figure 1-4As shown, the spraying assembly 10 includes a base 11 for support; a spraying seat 12 is arranged on the base 11, the spraying seat 12 is a hollow cylinder, and the internal cavity cooperates with the base 11 to form a concave cavity structure with an open top. Two sets of guide grooves 121 extending vertically are symmetrically arranged on the side wall of the concave cavity. A pressure plate 13 is arranged inside the concave cavity, the shape of the pressure plate is adapted to the shape of the concave cavity, so that the pressure plate 13 is in a dynamic sealing state when it moves up and down in the concave cavity to avoid air leakage. Two sets of guide blocks 131 are symmetrically arranged on both sides of the pressure plate 13, and the guide blocks 131 and the guide grooves 121 are also dynamically sealed. A nozzle 133 is arranged at the axis of the pressure plate 13, which can spray anti-caking agent onto the surface of the spherical product. The nozzle 133 is connected to a sprayer, so that anti-caking agent can be continuously sprayed onto the spherical product. Air nozzles 132 are formed on the pressure plate 13 and are evenly distributed on the outer side of the nozzles 133 along the axis of the pressure plate 13. A sealed air pressure chamber is formed between the pressure plate 13 and the bottom of the cavity, and an air pressure component is arranged inside the air pressure chamber. The air pressure component includes a booster 16 that pressurizes the air pressure chamber to push the pressure plate 13 upward, and a return spring 134 that can pull the receiving plate downward; the air pressure component also includes a pressure relief hole 122 that connects the air pressure chamber to the atmospheric environment when the pressure plate 13 moves upward to a predetermined position, thereby causing the air pressure chamber to release pressure instantaneously. The pressure relief hole 122 is arranged on the cavity wall of the cavity, and the predetermined position is the position where the pressure plate 13 rises when the material unloading operation and the material unloading operation are completed. A limiting plate 15 is arranged at the opening of the cavity. An air bladder 14 is arranged at the bottom of the limiting plate 15, which can expand radially and centripetally under the upward pressure of the pressure plate. The air bladder 14 is distributed in a ring shape in the cavity. After the spherical product is sprayed, it is pressed onto the opening of the expanded air bladder 14, and the diameter of the opening is smaller than the diameter of the spherical product.

[0051] like Figure 1 , Figure 5-8 As shown, the feeding assembly 20 of the present invention includes a material-picking drive rod 21. The material-picking drive rod 21 includes a material-picking straight rod 211 extending vertically, and a material-picking curved rod 212 inclined upwardly connected to the material-picking straight rod 211. A U-shaped material-picking push rod 213 extending vertically upward at both ends is arranged on the material-picking curved rod 212. The two ends of the material-picking push rod 213 are provided with locking slots 2131 that can engage with the two ends of the feeding slide rod 235, so that the material-picking push rod 213 pushes the feeding slide rod 235 to move from bottom to top. The material-picking straight rod 211 is slidably inserted into a set of guide grooves 121 in the vertical direction, and the bottom end of the material-picking straight rod 211 is connected to the guide block 131. Therefore, when the pressure plate 13 moves, the material-picking drive rod 21 also moves synchronously with the pressure plate 13.

[0052] The feeding assembly 20 also includes a storage box 23 for storing single spherical products. The storage box 23 is rectangular and its internal space can only hold one spherical product. An inlet 231 is provided on the side of the rectangular storage box 23, and an outlet 232 is provided on its bottom surface. The inlet 231 and outlet 232 are identical in size and shape. Symmetrically arranged feeding grooves 233 extending along the length of the side frame are provided on both sides of the inlet 231. Feeding rods 235 are slidably connected within the feeding grooves 233, with both ends of the feeding rods 235 located within the feeding grooves 233 on both sides, allowing the feeding rods 235 to move horizontally back and forth. Symmetrical discharge grooves 234 extending along the length of the side frame are provided on both sides of the discharge port 232. Discharge rods 236 are slidably connected within the discharge grooves 234, with both ends of the rods located within the grooves 234 on either side, allowing the rods to move horizontally and reciprocate along the grooves 234. A material carrier 237 connects the discharge rods 236 and the feed rods 235. A rotating shaft, axially parallel to the length of the side frame, is arranged at the intersection of the feed port 231 and the discharge port 232. The material carrier 237 passes around the rotating shaft and connects to both the feed rods 235 and the discharge rods 236. This rotation of the shaft reduces friction on the material carrier 237 during repeated pulling, extending its service life.

[0053] The driving component can pull the material carrier cloth 237 to move and cover the inlet 231 or outlet 232, so that the outlet 232 closes and the inlet 231 opens, or the inlet 231 closes and the outlet 232 opens. The driving component includes support columns 239 arranged on the side opposite to the inlet 231, and tension springs 238 are arranged between the two sets of support columns 239 and the two ends of the outlet slide rod 236 to pull the outlet slide rod 236 along the outlet slide 234 away from the inlet 231; the driving component also includes a material picking drive rod 21 that pushes the inlet slide rod 235 to move upward along the inlet slide 233. The feeding assembly 20 also includes a support frame 26, on which a storage box 25 is arranged. The bottom of the storage box 25 is connected to the inlet pipe 24, and the outlet end of the inlet pipe 24 is connected to the inlet 231. A material discharge chute 22 is arranged below the discharge port 232. The material discharge chute 22 is arranged on the material pick-up crank 212, and the material discharge chute 22 extends downward from the discharge port 232 to the nozzle 133 assembly so that the spherical product rolls down to the spraying position.

[0054] like Figure 9-11As shown, the ejector assembly 30 includes two columns 32 arranged on the base 11. A pusher rod 33 is hinged between the two columns 32. The pusher rod 33 has an L-shaped structure and sinks naturally under its own weight. A support seat 331 is arranged on one side of the pusher rod 33. A horizontal bar 332 that can only be bent downwards is hinged to the support seat 331 through a torsion spring seat. The ejector drive rod 31 includes an ejector straight rod 311 extending vertically. The ejector straight rod 311 is slidably inserted into a set of guide grooves 121 in the vertical direction, and the bottom end of the ejector straight rod 311 is connected to the guide block 131. Thus, when the pressure plate 13 moves, the ejector drive rod 31 also moves synchronously with the pressure plate 13. An L-shaped ejector curved rod 312 is arranged at the top of the ejector straight rod 311. The ejector straight rod 311 and the ejector curved rod 312 form a Z-shaped structure.

[0055] A material ejection lever 313 is arranged on the ejection lever 312, spatially perpendicular to the crossbar 332, and the crossbar 332 is located on the movement path of the material ejection lever 313. When the material ejection lever 313 moves upward, the crossbar 332 moves relative to the material ejection lever 313 along the length of the material ejection lever 313, so that the cantilever end of the pusher lever 33 rotates to the spherical product located on the airbag 14 opening, and pushes the spherical product onto the material ejection slide 34, and finally into the collection box 35. When the material ejection lever 313 moves downward after passing the crossbar 332, the material ejection lever 313 presses down on the cantilever end of the crossbar 332, causing the crossbar 332 to bend downward and pass over the crossbar 332.

[0056] Specific usage process:

[0057] In actual operation, the booster 16 is first turned on, continuously filling the pressure chamber with cooling gas, causing the pressure inside the chamber to rise continuously. At this time, the spherical product at the cavity opening is impacted by the gas from the nozzle 132. As the pressure inside the chamber continues to increase, the spherical product is stably suspended at the cavity opening. Because the pressure inside the chamber is constantly increasing, the pressure plate 13 also rises continuously against the tension of the return spring 134. When it reaches the predetermined position, the booster 16 maintains the current pressure under the action of the sensor, and simultaneously the nozzle 133 continues to spray. Because the spherical product rotates continuously during suspension, its surface can be thoroughly and evenly coated. Furthermore, the use of cooling gas allows the anti-caking agent to dry quickly. After the set spraying time, the sensor sends a signal to stop the nozzle 133 from spraying, and the booster 16 starts pressurizing. The pressure plate 13 continues to rise, and the spherical product also rises continuously. As the pressure plate 13 rises, it comes into contact with the airbag 14; the airbag 14 is compressed and expands radially toward the center. At this time, the spherical product has moved above the airbag 14, and under the continuous expansion of the airbag 14, the air nozzle 132 is gradually compressed and covered. At this time, the buoyancy of the spherical product gradually decreases, and it falls onto the airbag 14.

[0058] As the airbag 14 gradually contracts, the push rod 33 is continuously pried up; when the spherical product falls onto the airbag 14, the cantilever end of the push rod 33 can push the spherical product down. At the same time, the material storage box 23 begins to supply material.

[0059] During normal feeding, the spherical products in the storage box 23 slide along the feed pipe 24, with the foremost spherical product sliding into the storage box 23. At this time, the discharge slide bar 236, under the action of the tension spring 238, is located at the leftmost end of the discharge chute 234, and the feed slide bar 235 is pulled to the bottom of the feed chute 233, with the material carrier cloth 237 covering the discharge port 232. Since the size and shape of the material carrier cloth 237 are adapted to the discharge port 232, the spherical products are pressed against the material carrier cloth 237, that is, the material carrier cloth 237 holds the spherical products in the storage box 23. When material needs to be retrieved, the material retrieval push rod 213 moves upward, and the locking jaws 2131 engage with both ends of the feeding push rod, thereby pushing the feeding slide rod 235 upward along the feeding chute 233. The feeding slide rod 235 pulls the discharging slide rod 236 along the discharging chute 234 via the material carrier cloth 237. When the feeding slide rod 235 moves to the top of the feeding chute 233, the discharging slide rod 236 moves to the bottom of the discharging chute 234. At this time, the material carrier cloth 237 isolates the connection between the feeding pipe 24 and the storage box 23, preventing the spherical products from continuously unloading when the discharge port 232 is open. When the discharge port 232 is open, the dropping slide is located below the discharge port 232, and the spherical products slide downward along the dropping slide 22 onto the airbag 14. As the spherical product falls, the pressure plate 13 reaches the pressure relief hole 122 on the spraying base 12. At this moment, the pressure chamber is connected to the outside atmosphere, releasing pressure instantly, and the sensor simultaneously controls the intensifier to stop working. Under the action of the return spring 134, the pressure plate 13 moves back to its initial position. At this time, under the control of the sensor, the intensifier 16 restarts, thus starting a new round of spraying. During the reset process of the pressure plate 13, the airbag 14 also slowly restores its shape. At this time, the spherical product slowly falls into the concave cavity and finally presses on the air nozzle 132. Then, under the action of the air nozzle 132, it is suspended again, thus completing a new round of spraying.

[0060] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for spraying a surface of a spherical product, characterized in that, The application relates to a spraying assembly (10) which is provided with an air nozzle (132) for blowing and suspending a spherical product by cooling gas and a spraying nozzle (133) for spraying anti-coagulation agent on the surface of the product at the same time; a material taking-off assembly (30) for taking off the spherical product after spraying and a material feeding assembly (20) for providing new spherical products to the spraying position are arranged beside the spraying assembly (10); the spraying assembly (10) comprises a spraying seat (12) arranged on a base (11), the spraying seat (12) is formed with a concave cavity with an open top end, a pressure bearing disc (13) is movably arranged in the concave cavity, a closed air pressure chamber is formed between the pressure bearing disc (13) and the bottom of the concave cavity, and an air pressure device is arranged in the air pressure chamber for enabling the pressure bearing disc (13) to make reciprocating linear motion in the vertical direction; The air nozzle (132) and the spraying nozzle (133) connected with the air sprayer are both arranged on the pressure bearing disc (13), the spherical product falls into the concave cavity and is suspended above the air nozzle (132), and the spherical product can synchronously move upward with the pressure bearing disc (13); a guide groove (121) vertically extending in the length direction of the concave cavity is arranged on the side wall of the concave cavity, and a guide block (131) is arranged on the pressure bearing disc (13) and slidably matched with the guide groove (121); the air pressure device comprises a pressure increasing machine (16) for increasing the pressure of the air pressure chamber to push the pressure bearing disc (13) to move upward, and a reset spring (134) for pulling the pressure bearing disc (13) to move downward; the air pressure device further comprises a pressure relief hole (122) for connecting the air pressure chamber and the atmosphere when the pressure bearing disc (13) moves to a predetermined position, so that the air pressure chamber is instantaneously depressurized; the pressure relief hole (122) is arranged on the cavity wall of the concave cavity, and the predetermined position is the position of the pressure bearing disc (13) rising when the material taking-off operation and the material taking operation are completed; a limiting plate (15) is arranged at the cavity opening of the concave cavity, the bottom of the limiting plate (15) is arranged with air bags (14) which can expand in the radial direction under the extrusion of the pressure bearing disc (13) and are annularly distributed in the concave cavity, the spherical product after spraying is pressed on the closing opening of the expanded air bags (14), and the diameter of the closing opening is smaller than the diameter of the spherical product.

2. A device for spraying a surface of a spherical product according to claim 1, characterized in that The material taking-off assembly (30) comprises a stand column (32) arranged on the base (11), a pushing rod (33) is hinged on the stand column (32), a supporting seat (331) is arranged on the cantilever end of the pushing rod (33), a horizontal rod (332) which can only be bent downward is hinged on the supporting seat (331) through a torsion spring seat; a material taking-off lever (313) which is perpendicular to the horizontal rod (332) is arranged on a material taking-off driving rod (31), and the horizontal rod (332) is located in the moving path of the material taking-off lever (313); when the material taking-off lever (313) moves upward, the horizontal rod (332) moves along the length direction of the material taking-off lever (313), so that the cantilever end of the pushing rod (33) is rotated to the spherical product on the closing opening of the air bags (14) and pushes the spherical product to fall into a collecting box (35); after the material taking-off lever (313) passes over the horizontal rod (332), the material taking-off lever (313) moves downward, the material taking-off lever (313) presses on the cantilever end of the horizontal rod (332) and makes the horizontal rod (332) bend downward, and then the material taking-off lever (313) passes over the horizontal rod (332).

3. A device for spraying a surface of a spherical product according to claim 2, characterized in that The material returning driving rod (31) further comprises a material returning straight rod (311), the top end of the material returning straight rod (311) is arranged with an L-shaped material returning curved rod (312), and a material returning pry rod (313) is arranged on the material returning curved rod (312); the material returning straight rod (311) is slidingly inserted into a group of guide grooves (121) along the vertical direction, and the bottom end of the material returning straight rod (311) is fixedly connected with a guide block (131).

4. A device for spraying a surface of a spherical product according to claim 3, characterized in that The feeding assembly (20) comprises a material storage box (23) capable of storing single spherical products, the side surface of the cuboid-shaped material storage box (23) is provided with an inlet (231), and the bottom surface is provided with an outlet (232); the frames on the two sides of the inlet (231) are symmetrically provided with inlet sliding grooves (233) extending along the length direction of the frames on the two sides of the inlet (231), and the inlet sliding grooves (233) are slidingly connected with inlet sliding rods (235); the frames on the two sides of the outlet (232) are symmetrically provided with outlet sliding grooves (234) extending along the length direction of the frames on the two sides of the outlet (232), and the outlet sliding grooves (234) are slidingly connected with outlet sliding rods (236); the outlet sliding rods (236) and the inlet sliding rods (235) are connected with a material carrying cloth (237); a driving member can pull the material carrying cloth (237) to move and cover the inlet (231) or the outlet (232), so that the outlet (232) is closed to open the inlet (231) or the inlet (231) is closed to open the outlet (232).

5. A device for spraying a surface of a spherical product according to claim 4, characterized in that The driving member comprises support columns (239) arranged on the side surfaces opposite to the inlet (231), and pulling springs (238) are arranged between the two groups of support columns (239) and the two ends of the outlet sliding rods (236) to pull the outlet sliding rods (236) to move along the outlet sliding grooves (234) to move away from the inlet (231); the driving member further comprises a material taking driving rod (21) for pushing the inlet sliding rods (235) to move upwards along the inlet sliding grooves (233). The frames at the intersection of the inlet (231) and the outlet (232) are arranged with rotating shafts arranged in the length direction parallel to the intersection of the frames, and the material carrying cloth (237) is connected with the inlet sliding rods (235) and the outlet sliding rods (236) by passing around the rotating shafts.

6. A device for spraying a surface of a spherical product according to claim 5, characterized in that The material taking driving rod (21) comprises a material taking straight rod (211) extending along the vertical direction, the material taking straight rod (211) is slidingly inserted into a group of guide grooves (121) along the vertical direction, and the bottom end of the material taking straight rod (211) is fixedly connected with a guide block (131); the material taking straight rod (211) is connected with a material taking curved rod (212) arranged in an upward inclination, the material taking curved rod (212) is arranged with a U-shaped material taking push rod (213) extending vertically upwards at both ends, and the both ends of the material taking push rod (213) are arranged with a bayonet (2131) capable of being clamped at both ends corresponding to the inlet sliding rods (235), so that the material taking push rod (213) pushes the inlet sliding rods (235) to move upwards.

7. A device for spraying a surface of a spherical product according to claim 1, characterized in that The feeding assembly (20) further comprises a support frame (26) on which a storage box (25) is arranged, the bottom of the storage box (25) is communicated with a feeding pipe (24), the discharge end of the feeding pipe (24) and the feeding port (231) are communicated with each other; a drop slide (22) is arranged below the discharge port (232), the drop slide (22) is arranged on the material taking curved rod (212), and the drop slide (22) extends downward from the discharge port (232) to the air bag (14), so that the spherical product rolls to the spraying position.

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