Packaging device for chemical fertilizer

Abstract

The invention provides a chemical fertilizer packaging device, and relates to the technical field of chemical fertilizer production, the chemical fertilizer packaging device comprises a storage box, a stirring mechanism is arranged in the storage box, a discharge port is formed in the bottom of the storage box, a conical valve assembly is arranged at the discharge port and is used for connecting or disconnecting the discharge port, and a clamping mechanism is further arranged at the discharge port of the storage box. A packaging bag is fixed to the discharging port for loading, an oil cylinder is further installed below the storage box, the end of a piston rod of the oil cylinder is fixedly connected with a tray used for bearing the packaging bag, a conveying belt is further arranged on the side edge of the tray, the conveying face of the conveying belt is flush with the tray, and a bag sealing machine is further installed above the conveying belt. According to the packaging device for the chemical fertilizer, the round ball surrounding the conical valve can move outwards and upwards along with the shape of the material storage box when the valve body is lifted. The action directly cuts in and destroys a possibly formed material arch structure, and the materials are forced to loosen and collapse, so that the materials fall down smoothly.

Description

Technical Field

[0001] This invention relates to the field of fertilizer production technology, specifically to a packaging device for fertilizers. Background Technology

[0002] Chemical fertilizers are mineral fertilizers containing essential plant nutrients such as nitrogen, phosphorus, and potassium, produced through chemical or physical methods. They mainly include nitrogen fertilizers, phosphate fertilizers, potassium fertilizers, compound fertilizers, and micronutrient fertilizers. Before leaving the factory, chemical fertilizers stored in warehouses need to be quantitatively packaged into individual bags, requiring equipment for this quantitative packaging process.

[0003] A search revealed that Chinese utility model patent application number CN202023118580.4 discloses a feeding hopper for an automatic fertilizer packaging scale. The hopper includes a feeding hopper mounted on the automatic packaging scale body, comprising a hopper shell that is matched and connected to the automatic packaging scale body. The inner wall of the hopper shell is integrally formed with continuously arranged hemispherical surfaces. In application, the hemispherical surfaces are primarily used to reduce the contact area between fertilizer particles and the inner wall of the feeding hopper, thus reducing the adhesion of fertilizer to the inner wall. Because gaps exist between the hemispherical surfaces, some surfaces of the fertilizer particles are positioned in these gaps and are suspended, preventing contact with the bottom of the gaps, thereby reducing adhesion and the adsorption force of the inner wall of the feeding hopper on the fertilizer. This reduces the amount of fertilizer particles accumulating on the inner wall of the feeding hopper, making the automatic packaging scale's feeding more accurate.

[0004] However, when bulk materials such as fertilizers, grains, and powders fall from the bottom outlet of the silo (component 4), the fertilizers themselves are sticky and easily clump together, forming a "material arch" above the outlet. The materials squeeze each other, making it impossible for them to fall smoothly under their own weight, causing blockages and interruptions, and affecting the discharge of fertilizers. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and to propose a packaging device for fertilizers that can solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a packaging device for fertilizer, including a storage box, a stirring mechanism inside the storage box, a discharge port at the bottom of the storage box, and a conical valve assembly at the discharge port to connect or disconnect the discharge port. A clamping mechanism is also provided at the discharge port of the storage box to fix the packaging bag at the discharge port for filling. A hydraulic cylinder is also installed below the storage box, and a tray is fixedly connected to the piston rod end of the hydraulic cylinder for receiving the packaging bag. A conveyor belt is also provided on the side of the tray, the conveying surface of the conveyor belt is flush with the tray, and a bag sealing machine is installed above the conveyor belt.

[0007] Preferably, the conical valve assembly includes a drive component, a valve core, and a second rotating shaft. The drive component is fixedly installed on the bottom of the inner wall of the storage bin. The drive component is an electric cylinder, and the valve core is fixedly connected to the piston tube end of the electric cylinder.

[0008] Preferably, the stirring mechanism includes a motor, a bracket is fixedly connected to the outer wall of the motor, the bracket is fixedly connected to the inner wall of the storage box, and the output shaft of the motor is fixedly connected to a first connecting shaft that can change length. The end of the first connecting shaft away from the motor is connected to a stirring part for stirring fertilizer.

[0009] Preferably, the first coupling includes a drive shaft, a retaining shaft, and a third rotating shaft. One end of the drive shaft is fixedly connected to the output shaft of the motor, and the other end of the drive shaft has a retaining groove that mates with the retaining shaft. One end of the third rotating shaft is fixedly connected to the retaining shaft, and the retaining shaft is slidably connected in the retaining groove.

[0010] Preferably, the stirring part includes a shell, the third rotating shaft is rotatably connected to the shell, the bottom of the outer wall of the shell has a plurality of holes, each hole is slidably connected to a first push rod, the inside of the shell is fixedly connected to a second limiting bracket, the second limiting bracket has a plurality of slide rails, each slide rail is slidably connected to a second push rod, one end of the second push rod is fixedly connected to a first push rod, and the outer end of the first push rod is fixedly connected to a sphere.

[0011] Preferably, a first limiting bracket is fixedly connected to the second limiting bracket. The first limiting bracket has a slide rail, and a support rod is slidably connected to the slide rail. A spring is fixedly connected to the upper end of the support rod. The end of the spring away from the support rod is fixed to the top of the housing. The support rod has the same number of end faces as the second push rod. A second connecting shaft is connected between the support rod and the second push rod. One end of the second connecting shaft is rotatably connected to the support rod, and the other end is rotatably connected to the second push rod.

[0012] Preferably, the valve core is tapered, and a second rotating shaft is rotatably connected to the top of the valve core, with the other end of the second rotating shaft fixed to the bottom of the housing.

[0013] Preferably, the clamping mechanism includes a mounting plate and a sleeve. The sleeve is detachably connected to the discharge port of the storage box. The outer wall of the sleeve is also fixedly connected to the mounting plate. Two first rotating shafts are rotatably connected to both sides of the mounting plate. A crank is fixedly connected to the first rotating shaft on the same side. A fixing claw is fixedly connected to the bottom of each of the two cranks. An electric push rod is also provided between the two cranks. One end of the electric push rod drive is fixed to one of the cranks, and the other end of the electric push rod is rotatably connected to the other crank.

[0014] Preferably, the system also includes a base plate, on which the hydraulic cylinder and conveyor belt are mounted. A mounting frame is also fixedly connected to the base plate, and the storage bin is fixed on the mounting frame. A PLC controller is also installed on the mounting frame, and the hydraulic cylinder, conveyor belt, electric push rod, motor, bag sealing machine, and drive components are all electrically connected to the PLC controller.

[0015] Compared with existing technologies, this packaging device for fertilizers has the following advantages: 1. When the casing of this invention moves, the first push rod and spheres arranged around it expand outward under the action of spring force. At the same time, the first push rod, driven by the pneumatic motor, acts as a stirring rod to stir the fertilizer. These spheres surrounding the conical valve move outward and upward along with the shape of the storage box when the valve body is raised. This action directly cuts into and destroys any possible "material arch" structure, forcing the material to loosen and collapse, thus allowing it to fall smoothly.

[0016] Second, during the movement of the sphere, the sphere of this invention will adhere closely to or come very close to the inner wall of the silo. At this time, the sphere acts as a scraper, scraping off the fertilizer adhering to the wall surface and allowing it to flow into the main stream for discharge, ensuring the cleanliness and complete discharge of the material in the silo. At the same time, the shape of the sphere avoids damage to the inner wall of the storage box.

[0017] Third, the agitation motion of the spheres not only occurs near the outlet but also affects the materials on the outer perimeter. It keeps the fertilizer in the silo loose and fluid, preventing only the central material from falling while the surrounding material remains stationary. This ensures the uniformity and stability of the discharge and solves the problem of materials becoming denser and less fluid due to vibration or their inherent properties after prolonged storage in the storage bin. The integrated operation of the cone valve assembly and agitation mechanism is an active, mechanical method of breaking up arches, which is more direct and effective than relying on external devices such as silo vibrators or air cannons. It solves the fluidity problems of loose materials such as fertilizers caused by moisture, compaction, or granular characteristics, and prevents fertilizer deterioration caused by prolonged damp accumulation.

[0018] Other advantages, objectives and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from the practice of the invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the clamping mechanism of the present invention; Figure 3 For the present invention Figure 2 Enlarged schematic diagram of a local structure at point A; Figure 4 This is a schematic diagram of the cone valve assembly structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the local structure at point B; Figure 6 This is a schematic diagram of the stirring section structure of the present invention; Figure 7 This is a schematic diagram of the first limiting bracket and the second limiting bracket of the present invention.

[0020] In the picture: 1. Base plate; 2. Mounting bracket; 3. Clamping mechanism; 301. First rotating shaft; 302. Electric push rod; 303. Fixing claw; 304. Sleeve; 305. Mounting plate; 306. Crank rod; 4. Storage bin; 5. PLC controller; 6. Mixing mechanism; 601. Motor; 602. Bracket; 603. Mixing section; 604. First connecting shaft; 605. Drive shaft; 606. Third rotating shaft; 607. 608. Shaft; 609. First limiting bracket; 610. Spring; 611. Support rod; 612. Second limiting bracket; 613. First push rod; 614. Sphere; 615. Second connecting shaft; 616. Second push rod; 7. Bag sealing machine; 8. Conveyor belt; 9. Hydraulic cylinder; 10. Pallet; 11. Conical valve assembly; 1101. Second rotating shaft; 1102. Valve core; 1103. Drive component. Detailed Implementation

[0021] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example 1

[0022] Please see Figures 1 to 7A packaging device for fertilizer includes a storage bin 4, a stirring mechanism 6 inside the storage bin 4, a discharge port at the bottom of the storage bin 4, and a conical valve assembly 11 at the discharge port to connect or disconnect the discharge port. A clamping mechanism 3 is also located at the discharge port of the storage bin 4 to fix the packaging bag at the discharge port for filling. A hydraulic cylinder 9 is installed below the storage bin 4, and a tray 10 is fixedly connected to the piston rod end of the hydraulic cylinder 9 to receive the packaging bag. A conveyor belt 8 is also provided on the side of the tray 10, and the conveyor belt 8 has a transport surface... A bag-sealing machine 7 is installed above the conveyor belt 8 and flush with the pallet 10. Fertilizer is placed inside the storage bin 4. When discharging, the filling belt is placed at the discharge port. The electric push rod 302 closes the two fixing claws 303 to fix the bag. The drive component 1103 lifts the valve core 1102 to expose the discharge port. When the fertilizer is bagged, the bottom cylinder 9 drives the pallet 10 to lift the bag upwards to lift the material, so that the fertilizer in the bag is evenly filled. Then it is placed on the conveyor belt 8 and packaged by the bag-sealing machine 7 to complete the filling of fertilizer. Example 2

[0023] Based on the above embodiments, in this embodiment, for the feeding of fertilizer, the conical valve assembly 11 includes a drive component 1103, a valve core 1102, and a second rotating shaft 1101. The drive component 1103 is fixedly installed at the bottom of the inner wall of the storage box 4. The drive component is an electric cylinder. The piston tube end of the electric cylinder is fixedly connected to the valve core 1102. When the valve core 1102 is lifted upward, it will drive the housing 608 to move upward. As can be seen from the attached figure, the outer wall of the storage box 4 is in the shape of a frustum cone. When the housing 608 moves...

[0024] In this embodiment, the stirring mechanism 6 includes a motor 601. A bracket 602 is fixedly connected to the outer wall of the motor 601. The bracket 602 is fixedly connected to the inner wall of the storage box 4. The output shaft of the motor 601 is fixedly connected to a first connecting shaft 604 that can change length. The end of the first connecting shaft 604 away from the motor 601 is connected to a stirring part 603 for stirring fertilizer. The first connecting shaft 604 includes a drive shaft 605, a retaining shaft 607, and a third rotating shaft 606. It can be seen that when the housing 608 moves upward, the retaining shaft 607 retracts into the drive shaft 605. The specific shape of the retaining shaft 607 allows the drive shaft 605 and the third rotating shaft 606 to slide together while the drive shaft 605 can also drive the rotation of the third rotating shaft 606. One end of the drive shaft 605 is fixedly connected to the output shaft of the motor 601, and the other end of the drive shaft 605 has a groove that cooperates with the retaining shaft 607. One end of the third rotating shaft 606 is fixedly connected to... A retaining shaft 607 is slidably connected in a retaining groove. The stirring part 603 includes a housing 608, and a third rotating shaft 606 is rotatably connected to the housing 608. Several holes are opened at the bottom of the outer wall of the housing 608, and a first push rod 613 is slidably connected to each hole. A second limiting bracket 612 is fixedly connected inside the housing 608. The second limiting bracket 612 has several slide rails, and a second push rod 616 is slidably connected to each slide rail. One end of the second push rod 616 is fixedly connected to the first push rod 613, and the outer end of the first push rod 613 is fixedly connected to a sphere 614. The first push rods 613 and spheres 614 arranged around the perimeter expand outward under the elastic force of the spring 610. At the same time, when the pneumatic motor 601 is activated, the first push rod 613 acts as a stirring rod to stir the fertilizer. These spheres surrounding the valve core 1102 will move outward and upward with the shape of the storage box 4 when the valve body is raised. This action directly cuts into and destroys the potential "material arch" structure, forcing the material to loosen and collapse, thus allowing it to fall smoothly.

[0025] In this embodiment, to ensure that the sphere 614 can fit snugly against the storage bin 4, a first limiting bracket 609 is fixedly connected to the second limiting bracket 612. The first limiting bracket 609 has a slide rail, and a support rod 611 is slidably connected to the slide rail. A spring 610 is fixedly connected to the upper end of the support rod 611. The end of the spring 610 away from the support rod 611 is fixed to the top of the housing 608. The support rod 611 has the same number of end faces as the second push rod 616. The support rod 611 and the second push rod 616... A second connecting shaft 615 is connected between them. One end of the second connecting shaft 615 is rotatably connected to the support rod 611, and the other end is rotatably connected to the second push rod 616. The spring 610 is always in a compressed state. When the sleeve 608 moves upward, the expandable range of the sphere 614 increases with the shape of the storage box 4. The spring 610 is in a taut state and will extend its length, causing the support rod 611 and the second push rod 616 to move in the slide rail, thereby pushing the sphere 614. Example 3

[0026] Based on the above embodiments, in this embodiment, to ensure smooth fertilizer feeding, a conical valve is used to control the fertilizer discharge. The valve core 1102 is conical, and a second rotating shaft 1101 is rotatably connected to the top of the valve core 1102. The other end of the second rotating shaft 1101 is fixed to the bottom of the housing 608. The clamping mechanism 3 includes a mounting plate 305 and a sleeve 304. The sleeve 304 is detachably connected to the discharge port of the storage box 4. The outer wall of the sleeve 304 is also fixedly connected to the mounting plate 305. Two first rotating shafts 301 are rotatably connected to both sides of the device. A crank rod 306 is fixedly connected to the first rotating shaft 301 on the same side. A fixing claw 303 is fixedly connected to the bottom of each of the two crank rods 306. An electric push rod 302 is also provided between the two crank rods 306. One end of the drive part of the electric push rod 302 is fixed to one of the crank rods 306, and the other end of the electric push rod 302 is rotatably connected to the other crank rod 306. This clamping method is a conventional structure that is circulating in the market, and will not be described in detail here.

[0027] In this embodiment, to achieve a semi-automated process for the equipment, a base plate 1 is also included. The hydraulic cylinder 9 and the conveyor belt 8 are all mounted on the base plate 1. A mounting frame 2 is also fixedly connected to the base plate 1. The storage box 4 is fixed on the mounting frame 2. A PLC controller 5 is also installed on the mounting frame 2. The hydraulic cylinder 9, the conveyor belt 8, the electric push rod 302, the motor 601, the bag sealing machine 7, and the drive component 1103 are all electrically connected to the PLC controller 5. The operator can achieve automated control of the equipment through the PLC controller 5 and manually load materials, reducing the input of manpower and material resources.

[0028] Working principle: Fertilizer is placed inside the storage box 4. During feeding, the feeding belt is placed at the discharge port. The electric push rod 302 closes the two fixing claws 303 to fix the bag. The drive component 1103 lifts the valve core 1102 to expose the discharge port. When the fertilizer is bagged, the bottom cylinder 9 drives the tray 10 to lift the bag upwards to lift the material, so that the fertilizer in the bag is evenly filled. Then it is placed on the conveyor belt 8 and packaged by the bag sealing machine 7 to complete the filling of fertilizer.

[0029] Simultaneously, when the valve core 1102 is lifted upwards, it drives the housing 608 to move upwards. As shown in the attached diagram, the outer wall of the storage bin 4 is shaped like a frustum of a cone. When the housing 608 moves, the first push rod 613 and the spheres 614 arranged around it expand outwards under the elastic force of the spring 610. At the same time, the pneumatic motor 601 operates the first push rod 613 as a stirring rod to stir the fertilizer. These spheres surrounding the valve core 1102 move outwards and upwards along with the shape of the storage bin 4 when the valve body is lifted. This action directly cuts into and destroys the possible "material arch" structure, forcing the material to loosen and collapse, thus allowing it to fall smoothly. At the same time, during the movement, the spheres will adhere closely to or come very close to the inner wall of the bin. The spheres at this time act as scrapers, scraping off the fertilizer adhering to the wall surface and allowing it to flow into the main stream for discharge, ensuring the cleanliness and complete discharge of the material in the bin. At the same time, the shape of the spheres avoids damage to the inner wall of the storage bin 4.

[0030] The spherical agitation not only occurs near the outlet but also affects the surrounding materials. It keeps the fertilizer in the silo loose and fluid, preventing only the central material from falling while the surrounding material remains stationary. This ensures uniform and stable discharge and addresses the issue of materials becoming compacted and less fluid due to vibration or their inherent properties after prolonged storage in the storage bin 4. The integrated linkage between the cone valve assembly 11 and the agitation mechanism 6 provides an active, mechanical method of breaking up arches, which is more direct and effective than relying on external devices such as silo wall vibrators or air cannons. It solves the fluidity problems caused by moisture, compaction, or granular characteristics of loose materials like fertilizer, preventing spoilage caused by prolonged moisture accumulation.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A packaging device for fertilizers, comprising a storage bin (4), characterized in that: The storage box (4) is equipped with a stirring mechanism (6). The bottom of the storage box (4) has a discharge port, and a cone valve assembly (11) is provided at the discharge port to connect or disconnect the discharge port. A clamping mechanism (3) is also provided at the discharge port of the storage box (4). The clamping mechanism (3) fixes the packaging bag at the discharge port for loading. A hydraulic cylinder (9) is also installed below the storage box (4). A tray (10) is fixedly connected to the piston rod end of the hydraulic cylinder (9) for receiving the packaging bag. A conveyor belt (8) is also provided on the side of the tray (10). The transport surface of the conveyor belt (8) is flush with the tray (10). A bag sealing machine (7) is also installed above the conveyor belt (8). The stirring mechanism (6) includes a motor (601), a bracket (602) is fixedly connected to the outer wall of the motor (601), the bracket (602) is fixedly connected to the inner wall of the storage box (4), the output shaft of the motor (601) is fixedly connected to a first connecting shaft (604) that can change length, and the end of the first connecting shaft (604) away from the motor (601) is connected to a stirring part (603) for stirring fertilizer.

2. The packaging device for fertilizer according to claim 1, characterized in that: The conical valve assembly (11) includes a drive (1103), a valve core (1102), and a second rotating shaft (1101). The drive (1103) is fixedly installed on the bottom of the inner wall of the storage box (4). The drive is an electric cylinder, and the valve core (1102) is fixedly connected to the piston tube end of the electric cylinder.

3. A packaging device for fertilizer according to claim 2, characterized in that: The first connecting shaft (604) includes a drive shaft (605), a retaining shaft (607), and a third rotating shaft (606). One end of the drive shaft (605) is fixedly connected to the output shaft of the motor (601), and the other end of the drive shaft (605) is provided with a retaining groove that cooperates with the retaining shaft (607). One end of the third rotating shaft (606) is fixedly connected to the retaining shaft (607), and the retaining shaft (607) is slidably connected in the retaining groove.

4. A packaging device for fertilizer according to claim 3, characterized in that: The stirring part (603) includes a shell (608), and the third rotating shaft (606) is rotatably connected to the shell (608). The bottom of the outer wall of the shell (608) has several holes, and a first push rod (613) is slidably connected to each hole. A second limiting bracket (612) is fixedly connected inside the shell (608). The second limiting bracket (612) has several slide rails, and a second push rod (616) is slidably connected to each slide rail. One end of the second push rod (616) is fixedly connected to the first push rod (613), and a sphere (614) is fixedly connected to the outer end of the first push rod (613).

5. A packaging device for fertilizer according to claim 4, characterized in that: A first limiting bracket (609) is fixedly connected to the second limiting bracket (612). The first limiting bracket (609) has a slide rail, and a support rod (611) is slidably connected to the slide rail. A spring (610) is fixedly connected to the upper end of the support rod (611). The end of the spring (610) away from the support rod (611) is fixed to the top of the housing (608). The support rod (611) has the same number of end faces as the second push rod (616). A second connecting shaft (615) is connected between the support rod (611) and the second push rod (616). One end of the second connecting shaft (615) is rotatably connected to the support rod (611), and the other end is rotatably connected to the second push rod (616).

6. A packaging device for fertilizer according to claim 5, characterized in that: The valve core (1102) is conical in shape, and a second rotating shaft (1101) is rotatably connected to the top of the valve core (1102). The other end of the second rotating shaft (1101) is fixed to the bottom of the housing (608).

7. A packaging device for fertilizer according to claim 1, characterized in that: The clamping mechanism (3) includes a mounting plate (305) and a sleeve (304). The sleeve (304) is detachably connected to the discharge port of the storage box (4). The outer wall of the sleeve (304) is also fixedly connected to the mounting plate (305). Two first rotating shafts (301) are rotatably connected to both sides of the mounting plate (305). A crank rod (306) is fixedly connected to the first rotating shaft (301) on the same side. A fixing claw (303) is fixedly connected to the bottom of the two crank rods (306). An electric push rod (302) is also provided between the two crank rods (306) to control the distance between the crank rods (306). One end of the drive part of the electric push rod (302) is fixed to one of the crank rods (306), and the other end of the electric push rod (302) is rotatably connected to the other crank rod (306).

8. A packaging device for fertilizer according to any one of claims 1-7, characterized in that: It also includes a base plate (1) and a PLC controller (5). The oil cylinder (9) and the conveyor belt (8) are both mounted on the base plate (1). A mounting frame (2) is also fixedly connected to the base plate (1). The storage box (4) is fixed on the mounting frame (2). A PLC controller (5) is also installed on the mounting frame (2). The PLC controller (5) controls the oil cylinder (9), the conveyor belt (8), the electric push rod (302), the motor (601), the bag sealing machine (7), and the drive unit (1103) to perform operations.

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