Fertilizer granulation compression roller device and use method thereof

Abstract

The invention relates to the technical field of fertilizer production, and discloses a fertilizer granulation compression roller device and a use method thereof.The fertilizer granulation compression roller device comprises a main shaft and two end plates fixedly arranged at the two ends of the main shaft, and three extrusion rollers are detachably arranged on the circumferential face of the main shaft; the contraction structure comprises a storage cavity, conveying channels, a valve, a push plate and a plug body, the valve is fixedly connected with the main shaft, the push plate is fixedly connected with the plug body, the storage cavity is formed in the end of the main shaft, the conveying channels communicated with the storage cavity are formed in the circumferential surface of the main shaft, and the plug body is arranged in the conveying channels in a sliding mode. The pushing plate extrudes and pushes the valves to deform, so that materials in the storage space can have certain pressure, the materials are promoted to be discharged from the storage space and then extruded from the forming holes of the circular mold to form particles, the granulation stability is guaranteed, and secondly, the materials in the storage space can be completely emptied through the deformable valves, so that the materials can be conveniently stored next time.

Description

Technical Field

[0001] The invention relates to the technical field of fertilizer production, and in particular to a fertilizer granulating roller device and a use method thereof. Background Art

[0002] There are various ways to granulate fertilizers, and ring die extrusion granulation is one of them. The working principle of the ring die granulator is to utilize the strong extrusion effect of the ring die and the pressure roller. With the ring die, the material is squeezed by the pressure roller from the forming hole of the ring die to form columnar particles, which are then cut into particles of the required length by the cutter.

[0003] Publication No. CN102908944A discloses a prior art of a roller assembly of a granulator in the form of a ring die, comprising an eccentric shaft, a roller and a pressing plate, wherein the rollers are three triangularly distributed rollers connected to the pressing plate.

[0004] In the prior art, in order to achieve the purpose of stably supporting the eccentric shaft, three pressing rollers are arranged on the circumferential surface of the eccentric shaft. In actual application, the forming particle raw material will enter between two adjacent pressing rollers. When the eccentric shaft drives each pressing roller to extrude the raw material, the material between the two pressing rollers cannot be discharged for extrusion to form particles. As the eccentric shaft continues to rotate, the space between the pressing rollers will gradually shrink, thereby affecting the feed amount and reducing the production efficiency.

[0005] To this end, we propose a fertilizer granulation roller device and a method of using the same. Summary of the invention

[0006] The present invention mainly solves the technical problem that the material between the pressing rollers cannot be discharged and affects the feeding amount, and provides a fertilizer granulating pressing roller device and a use method thereof.

[0007] In order to achieve the above object, the present invention adopts the following technical scheme, a fertilizer granulation roller device and a method of using the same, comprising:

[0008] A main shaft and two end plates fixedly arranged at both ends of the main shaft, the main shaft has a circumferential surface, three squeezing rollers are detachably arranged on the circumferential surface of the main shaft, and a storage space for storing materials is formed between two adjacent squeezing rollers;

[0009] A contraction structure is arranged in the storage space for adjusting the amount of material in the storage space, the contraction structure comprises a storage cavity, a conveying channel, a valve, a push plate and a plug body, the valve is fixedly connected to the main shaft, the push plate is fixedly connected to the plug body, the end of the main shaft is provided with a storage cavity, the circumferential surface of the main shaft is provided with a plurality of conveying channels connected to the storage cavity, the plug body is slidably arranged in the conveying channel, and the push plate can squeeze and push the valve to deform to adjust the size of the storage space;

[0010] The mounting assembly is arranged on the wall surface of the main shaft and is used to lock the squeezing roller.

[0011] As a preferred embodiment of the present invention, the storage cavity is opened along the radial direction of the main shaft, the end plate is locked and fixed to the main shaft by bolts to seal the storage cavity, and a sealing gasket is provided between the end plate and the end of the main shaft.

[0012] As a preferred embodiment of the present invention, the plug body is formed into a cylinder, the delivery channel is adapted to the plug body, a sealing ring is provided in the delivery channel, three push plates are provided on the circumferential surface of the main shaft for squeezing the corresponding valve deformation and expansion, and each push plate is slidably connected to the main shaft through the same plug body.

[0013] As a preferred embodiment of the present invention, the main shaft is a cylinder with a groove, and a notch with a trapezoidal cross section is provided on the circumferential surface of the main shaft, and the main shaft forms a storage space through the notch.

[0014] As a preferred embodiment of the present invention, a plurality of placement grooves are provided on the circumferential surface of the main shaft, and the squeezing rollers are installed in the placement grooves.

[0015] As a preferred embodiment of the present invention, the mounting assembly includes a stop groove, a key groove, a side baffle and a pressure cover. The circumferential surface of the main shaft is provided with a stop groove, a key groove is provided in the stop groove, the end of the extrusion roller is inserted into the stop groove and engaged with the key groove, the side baffle is fixedly connected to the main shaft, and the pressure cover is fixed to the main shaft by bolts and the end of the extrusion roller is limited.

[0016] As a preferred embodiment of the present invention, a clamping block is inserted into the end of the squeezing roller, the clamping block at the end of the squeezing roller is inserted into the keyway, the keyway forms a rectangular groove, and the clamping block is a rectangular column.

[0017] As a preferred embodiment of the present invention, the end of the squeezing roller forms a cylinder, a slot is provided at the end of the squeezing roller, the clamping block is inserted into the slot, and the clamping block protrudes from the circumferential surface of the squeezing roller.

[0018] As a preferred embodiment of the present invention, the pressure cover and the side baffle plate together form a fan-shaped plate, the fan-shaped plate formed by the side baffle plate and the pressure cover is tangent to the circumferential surface of the extrusion roller, and the same anti-slip groove is provided on the wall surface of the pressure cover close to the main shaft, and the two anti-slip grooves together form a circular hole adapted to the end of the extrusion roller.

[0019] A method for using a fertilizer granulating roller device, characterized in that it comprises the following steps:

[0020] Step 1: Loosen the screws on the gland, remove the gland, insert the block into the slot at the end of the extrusion roller, put the end of the extrusion roller into the stop groove, cover the gland and lock it with bolts;

[0021] Step 2: Fix the flange of the end plate side wall and the flange of the external motor output shaft with screws and nuts;

[0022] Step 3: Start the motor, and the motor is powered to drive the end plate and the spindle to rotate;

[0023] Step 4: The main shaft drives each extrusion roller to rotate in the ring die. When the storage space is facing the feeding port, the material enters the storage space through the pressure applied by the external feeder, which squeezes the valve toward the extrusion roller and deforms it. The volume of the storage space is expanded and the material enters the storage space;

[0024] Step 5: As the main shaft rotates, the storage space and the feeding port of the ring die are misaligned. The oil pressure in the storage cavity pushes the plug to slide in the conveying channel and pushes the push plate. The push plate squeezes the valve to deform and discharge the material in the storage space to complete granulation.

[0025] Beneficial Effects

[0026] The present invention provides a fertilizer granulation roller device and a method for using the same. The device has the following beneficial effects:

[0027] 1. A fertilizer granulating roller device and a method of using the same, through the pressure applied by an external feeder, the material enters the storage space and squeezes the valve to deform and sink toward the squeezing roller, so that the volume of the storage space is expanded, and the valve squeezes the push plate to make the plug slide in the conveying channel, and the storage chamber can be filled with oil or injected with air. The sliding of the plug can squeeze the air or oil, thereby giving the valve a certain support force. In the granulation stage where the feeding space and the feeding port are misaligned, the push plate squeezes the valve to deform so that the material in the storage space has a certain pressure, which promotes the discharge of the material from the storage space and then extrudes it from the forming hole of the ring die to form particles, thereby ensuring the stability of granulation. Secondly, the deformable valve can also completely empty the material in the storage space, which is convenient for the next storage and ensures the utilization rate of the storage space, which has a positive significance for improving the granulation efficiency in actual production.

[0028] 2. A fertilizer granulation roller device and a method of using the same, by setting a storage cavity and a conveying channel, when one of the storage spaces is directly opposite to the feeding port, the other two storage spaces are offset from the feeding port, and the oil or air in the storage cavity is compressed by the material entering the storage space, thereby promoting the other two valves that are offset from the feeding port to have a larger deformation expansion amplitude, promoting the emptying of the material in the two offset storage spaces, and the three storage spaces are alternately aligned with the feeding holes in turn, promoting each other's discharge, and achieving the purpose of stable granulation.

[0029] 3. A fertilizer granulating roller device and a method of using the same, by providing a detachable pressure cover, the pressure cover can be removed, the end of the extrusion roller can be placed in the anti-slip groove, and then the pressure cover is covered and locked by bolts, and then the pressure cover and the main shaft together wrap the end of the extrusion roller to limit the position, which has the effect of facilitating the disassembly and assembly of the extrusion roller, and an extrusion roller can be replaced separately according to the usage, which is convenient for assembly and later maintenance.

[0030] 4. A fertilizer granulation roller device and a method of using the same, a side baffle and a pressure cover together form a fan-shaped plate to block the gap between the ends of two adjacent extrusion rollers, that is, the port of the storage space, so that the storage space can maintain sufficient back pressure. When discharging and granulating, the material is suppressed from being discharged from the port of the storage space, thereby ensuring the expulsion effect of the material and promoting granulation and forming.

[0031] 5. A fertilizer granulating roller device and its use method, the side baffle and the pressure cover at the same end of the main shaft together form an annular plate, the circumferential surface of the annular plate contacts the inner wall of the ring die, and cooperates with the valve, so that the storage space between the two extrusion rollers is in a relatively sealed environment, and then the deformation and expansion of the valve can better extrude the material.

[0032] 6. A fertilizer granulating roller device and a method of using the same are provided with a detachable card block. When the card block is removed and the roller is installed, the end of the extrusion roller can rotate in the anti-slip groove. As the main shaft rotates, the extrusion roller can roll on the inner wall of the ring die. The card block is inserted into the slot at the end of the extrusion roller and the extrusion roller is installed in the anti-slip groove. The card block can be inserted into the key slot. At this time, the extrusion roller will only rotate with the main shaft and will not rotate on its own. It can be adjusted according to the viscosity of the raw material, has better flexibility of use, and better practical application effect.

[0033] 7. A fertilizer granulation roller device and a method of using the same, wherein three extrusion rollers are equidistantly arranged on the circumferential surface of a main shaft, and the main shaft needs to be used in conjunction with a ring die, the ring die has a feeding port, and the main shaft rotates in the ring die, and each extrusion roller rolls in the ring die to extrude the material so that the material is extruded from the forming hole of the ring die to form particles, and multiple card blocks cooperate in granulation, with good effect and high efficiency. The main shaft can maintain stable rotation under the support of the three extrusion rollers, is not easily offset and extruded to deform the ring die, and has the characteristics of long service life.

[0034] 8. A fertilizer granulating roller device and a method of using the same, by providing a detachable card block, a plurality of slots are equidistantly provided at the end of the extrusion roller, and the slots are distributed in a circular array. By inserting the card block into the slots at different positions, the position of the circumferential surface of the extrusion roller can be adjusted, thereby changing the adjustment of the contact position between the extrusion roller and the ring die. When the card block is installed, only a local position of the circumferential surface of the extrusion roller contacts the ring die. By changing the contact position of the extrusion roller, uniform wear of the extrusion roller can be achieved, and a reduction in service life caused by local wear can be avoided, and the service life of the extrusion roller is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is one of the overall stereograms of the present invention;

[0036] Figure 2 This is the second overall stereogram of the present invention;

[0037] Figure 3 It is a three-dimensional diagram of the main axis of the present invention;

[0038] Figure 4 A three-dimensional diagram of the side baffle and the gland installed on the main shaft of the present invention;

[0039] Figure 5 This is a diagram of the assembly of the gland and the main shaft of the present invention;

[0040] Figure 6 A three-dimensional diagram of the shrinkage structure installed for the main shaft;

[0041] Figure 7 It is a three-dimensional diagram of the valve, the push plate and the plug body;

[0042] Figure 8 Schematic diagram of installing the clamp block for the squeezing roller.

[0043] Legend: 10. Main shaft; 11. End plate; 12. Extrusion roller; 13. Placement groove; 14. Anti-slip groove; 15. Keyway; 16. Side baffle; 17. Pressure cover; 20. Storage chamber; 21. Delivery channel; 22. Valve; 23. Push plate; 24. Plug body; 30. Block. DETAILED DESCRIPTION

[0044] A fertilizer granulation roller device and a method of using the same, such as Figure 1 and Figure 2 As shown, including:

[0045] The main shaft 10 and two end plates 11 fixedly arranged at both ends of the main shaft 10, the main shaft 10 has a circumferential surface, and three squeezing rollers 12 are detachably arranged on the circumferential surface of the main shaft 10, and a storage space for storing materials is formed between two adjacent squeezing rollers 12, wherein the cross sections of the main shaft 10 and the end plates 11 are the same, and the cross section of the main shaft 10 forms a three-leaf shape, and the three squeezing rollers 12 are equidistantly arranged on the circumferential surface of the main shaft 10, and the main shaft 10 needs to be used with a ring die, and the ring die has a feeding port, and the main shaft 10 rotates in the ring die, and each squeezing roller 12 rolls and squeezes the material in the ring die so that the material is extruded from the forming hole of the ring die to form particles, and multiple card blocks 30 cooperate in granulation, with good effect and high efficiency, and the main shaft 10 can maintain stable rotation under the support of the three squeezing rollers 12, and is not easy to deviate and deform the extrusion ring die, and has the characteristics of long service life.

[0046] like Figure 3As shown, the main shaft 10 is a cylinder with a groove. The circumferential surface of the main shaft 10 is provided with a notch with a trapezoidal cross-section. The main shaft 10 forms a storage space through the notch. When the storage space is opposite to the feeding port of the ring die, the raw material enters the storage space. As the main shaft 10 rotates, the storage space and the feeding port are misaligned. As the main shaft 10 continues to rotate, the material in the storage space can be used for extrusion to form particles.

[0047] like Figure 6 and Figure 7 As shown, the contraction structure is arranged in the storage space for adjusting the amount of material in the storage space. The contraction structure includes a storage chamber 20, a conveying channel 21, a valve 22, a push plate 23 and a plug body 24. The valve 22 is fixedly connected to the main shaft 10, and the push plate 23 is fixedly connected to the plug body 24. The storage chamber 20 is opened at the end of the main shaft 10, and a plurality of conveying channels 21 connected to the storage chamber 20 are opened on the circumferential surface of the main shaft 10. The plug body 24 is slidably arranged in the conveying channel 21, and the push plate 23 can squeeze and push the valve 22 to deform and adjust the shape. The storage chamber 20 is opened along the radial direction of the main shaft 10, the end plate 11 is locked and fixed with the main shaft 10 by bolts to block the storage chamber 20, a sealing gasket is arranged between the end plate 11 and the end of the main shaft 10, the plug body 24 forms a cylinder, the delivery channel 21 is adapted to the plug body 24, a sealing ring is arranged in the delivery channel 21, three push plates 23 are arranged on the circumferential surface of the main shaft 10 for squeezing and pushing the corresponding valve 22 to deform and expand, and each push plate 23 is slidably connected with the main shaft 10 through the same plug body 24;

[0048] In the present scheme, the valve 22 is set at the opening position of the storage space. When the storage space is facing the feeding port for filling, the pressure applied by the external feeder will squeeze the valve 22 into a concave shape toward the extrusion roller 12 when the material enters the storage space, and the volume of the storage space is expanded. The valve 22 squeezes the push plate 23 to make the plug body 24 slide in the conveying channel 21. The storage chamber 20 can be filled with oil or injected with air. The sliding of the plug body 24 can squeeze the air or oil, thereby giving the valve 22 a certain supporting force. In the granulation stage where the feeding space and the feeding port are misaligned, the push plate 23 squeezes the valve 22 to deform so that the material in the storage space has a certain pressure, which promotes the discharge of the material from the storage space and then extrudes it from the forming hole of the ring die to form particles, thereby ensuring the stability of the granulation. Secondly, the deformable valve 22 can also completely empty the material in the storage space, which is convenient for the next storage.

[0049] By setting the storage cavity 20 and the conveying channel 21, when one of the storage spaces is facing the feeding port, the other two storage spaces are offset from the feeding port. The oil or air in the storage cavity 20 is compressed by the material entering the storage space, thereby promoting the other two valves 22 that are offset from the feeding port to have a larger deformation expansion amplitude, promoting the emptying of the materials in the two offset storage spaces, and the three storage spaces are alternately aligned with the feeding holes in turn, promoting each other's discharge, and achieving the purpose of stable granulation.

[0050] like Figure 3 As shown, the circumferential surface of the main shaft 10 is provided with a plurality of placement grooves 13, and the extrusion roller 12 is installed in the placement grooves 13, wherein the placement grooves 13 are notches with an arc-shaped cross-section, and part of the circumferential surface of the extrusion roller 12 is located in the placement grooves 13, and part of the circumferential surface of the extrusion roller 12 protrudes from the main shaft 10 to contact the inner wall of the ring die to achieve extrusion granulation.

[0051] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the mounting assembly is arranged on the wall surface of the main shaft 10 for locking the squeezing roller 12;

[0052] The mounting assembly includes a stop groove 14, a key groove 15, a side baffle 16 and a pressure cover 17. The circumferential surface of the main shaft 10 is provided with a stop groove 14, and a key groove 15 is provided in the stop groove 14. The end of the extrusion roller 12 is clamped into the stop groove 14 and clamped with the key groove 15. The side baffle 16 is fixedly connected to the main shaft 10. The pressure cover 17 is fixed to the main shaft 10 by bolts and the end of the extrusion roller 12 is limited. The pressure cover 17 and the side baffle 16 together form a fan-shaped plate. The fan-shaped plate formed by the side baffle 16 and the pressure cover 17 is tangent to the circumferential surface of the extrusion roller 12. The wall surface of the pressure cover 17 close to the main shaft 10 is provided with the same stop groove 14, and the two stop grooves 14 together form a circular hole adapted to the end of the extrusion roller 12.

[0053] In the present scheme, by providing a detachable pressure cover 17, the pressure cover 17 can be removed, the end of the extrusion roller 12 can be placed in the anti-slip groove 14, and then the pressure cover 17 is covered and locked by bolts. Then the pressure cover 17 and the main shaft 10 jointly wrap the end of the extrusion roller 12 to limit the position, which has the effect of facilitating the disassembly and assembly of the extrusion roller 12. One extrusion roller 12 can be replaced separately according to the usage, which is convenient for assembly and later maintenance.

[0054] The side baffle 16 and the pressure cover 17 together form a fan-shaped plate to block the interval between the ends of two adjacent extrusion rollers 12, that is, the port of the storage space, so that the storage space can maintain sufficient back pressure. When discharging and granulating, the material is suppressed from being discharged from the port of the storage space, thereby ensuring the extrusion effect of the material and promoting granulation molding.

[0055] The side baffle 16 and the pressure cover 17 at the same end of the main shaft 10 together form an annular plate, the circumferential surface of the annular plate contacts the inner wall of the ring die, and cooperates with the valve 22 to make the storage space between the two extrusion rollers 12 in a relatively sealed environment, so that the deformation and expansion of the valve 22 can better extrude the material.

[0056] like Figure 8 As shown, a block 30 is inserted at the end of the squeezing roller 12, and the block 30 at the end of the squeezing roller 12 is inserted into the key slot 15. The key slot 15 forms a rectangular slot, and the block 30 is a rectangular cylinder. The end of the squeezing roller 12 forms a cylindrical body. A slot is opened at the end of the squeezing roller 12, and the block 30 is inserted into the slot. The block 30 protrudes from the circumferential surface of the squeezing roller 12.

[0057] A detachable clamping block 30 is provided. When the clamping block 30 is removed to install the extrusion roller 12, the end of the extrusion roller 12 can rotate in the anti-slip groove 14. As the main shaft 10 rotates, the extrusion roller 12 can roll on the inner wall of the ring die. The clamping block 30 is inserted into the slot at the end of the extrusion roller 12 and the extrusion roller 12 is installed in the anti-slip groove 14. The clamping block 30 can be inserted into the key groove 15. At this time, the extrusion roller 12 will only rotate with the main shaft and will not rotate on its own. It can be adjusted according to the viscosity of the raw material, has better flexibility of use, and better practical application effect.

[0058] By providing a detachable clamping block 30, a plurality of slots are equidistantly provided at the end of the extrusion roller 12, and the slots are distributed in a circular array. By inserting the clamping block 30 into the slots at different positions, the position of the circumferential surface of the extrusion roller 12 can be adjusted, thereby changing the adjustment of the contact position between the extrusion roller 12 and the ring die. When the clamping block 30 is installed, only a local position of the circumferential surface of the extrusion roller 12 contacts the ring die. By changing the contact position of the extrusion roller 12, uniform wear of the extrusion roller 12 can be achieved, and a reduction in service life caused by local wear can be avoided, and the service life of the extrusion roller 12 is extended.

[0059] A flange is fixedly mounted on the end of the end plate 11, and the flange can be connected to the flange of the motor output shaft to drive the end plate 11 and the main shaft 10 to rotate through the motor, which will not be described in detail here.

[0060] The working principle of the present invention is as follows: the pressure cover 17 is removed, the clamping block 30 is inserted into the slot at the end of the squeezing roller 12, the end of the squeezing roller 12 is placed in the anti-slip groove 14, and then the pressure cover 17 is covered and locked by bolts, and then the pressure cover 17 and the main shaft 10 jointly wrap the end of the squeezing roller 12 to limit the position, and the flange of the side wall of the end plate and the flange of the external motor output shaft are fixed by screws and nuts; the motor is started, and the motor is powered to drive the end plate and the main shaft to rotate; the main shaft drives each squeezing roller to rotate in the ring die;

[0061] The side baffle 16 and the pressure cover 17 together form a fan-shaped plate to block the interval between the ends of two adjacent squeezing rollers 12, that is, the port of the storage space. The side baffle 16 and the pressure cover 17 at the same end of the main shaft 10 together form an annular plate. The circumferential surface of the annular plate contacts the inner wall of the ring die. The storage space can maintain sufficient back pressure. Through the pressure applied by the external feeder, the material enters the storage space and squeezes the valve 22 to deform and concave toward the squeezing roller 12, so that the volume of the storage space is expanded. The valve 22 squeezes the push plate 23 to make the plug body 24 slide in the conveying channel 21, and the storage cavity 20 The inside can be filled with oil or injected with air, and the sliding of the plug body 24 can squeeze the air or oil, thereby giving a certain supporting force to the valve 22. In the granulation stage when the feeding space and the feeding port are misaligned, the push plate 23 squeezes the valve 22 to deform so that the material in the storage space can have a certain pressure, which promotes the material to be discharged from the storage space and then extruded from the forming hole of the ring die to form particles. The particles are formed, which promotes the emptying of the material in the storage space. As the main shaft 10 continues to rotate, the storage space moves again to face the feeding port, and the material is added to the storage space again. This reciprocating process realizes continuous granulation.

[0062] The motor mentioned in the above-mentioned use process needs to be connected to the control switch electrical signal, and the control switch is connected to the power supply. The specific specifications of the motor and the control switch are not restricted too much here.

[0063] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fertilizer granulation roller device, characterized in that: include: A main shaft (10) and two end plates (11) fixedly arranged at both ends of the main shaft (10); the main shaft (10) has a circumferential surface; three squeezing rollers (12) are detachably arranged on the circumferential surface of the main shaft (10); a storage space for storing materials is formed between two adjacent squeezing rollers (12); A contraction structure is arranged in the storage space and is used to adjust the amount of material in the storage space. The contraction structure comprises a storage cavity (20), a conveying channel (21), a valve (22), a push plate (23) and a plug body (24). The valve (22) is fixedly connected to the main shaft (10), and the push plate (23) is fixedly connected to the plug body (24). The storage cavity (20) is provided at the end of the main shaft (10), and a plurality of conveying channels (21) connected to the storage cavity (20) are provided on the circumferential surface of the main shaft (10). The plug body (24) is slidably arranged in the conveying channel (21), and the push plate (23) can squeeze and push the valve (22) to deform and adjust the size of the storage space. The mounting assembly is arranged on the wall surface of the main shaft (10) and is used to lock the squeezing roller (12).

2. The fertilizer granulation roller device according to claim 1, characterized in that: The storage cavity (20) is opened along the radial direction of the main shaft (10); the end plate (11) is locked and fixed to the main shaft (10) by bolts to seal the storage cavity (20); and a sealing gasket is provided between the end plate (11) and the end of the main shaft (10).

3. The fertilizer granulation roller device according to claim 1, characterized in that: The plug body (24) is formed into a cylindrical body, the delivery channel (21) is matched with the plug body (24), a sealing ring is arranged in the delivery channel (21), and three push plates (23) are arranged on the circumferential surface of the main shaft (10) for squeezing and pushing the corresponding valve (22) to deform and expand, and each push plate (23) is slidably connected to the main shaft (10) through the same plug body (24).

4. The fertilizer granulation roller device according to claim 1, characterized in that: The main shaft (10) is a column with a groove, and a notch with a trapezoidal cross section is provided on the circumferential surface of the main shaft (10), and the main shaft (10) forms a storage space through the notch.

5. The fertilizer granulation roller device according to claim 1, characterized in that: The circumferential surface of the main shaft (10) is provided with a plurality of placement grooves (13), and the squeezing rollers (12) are installed in the placement grooves (13).

6. The fertilizer granulation roller device according to claim 1, characterized in that: The installation assembly comprises a stop groove (14), a key groove (15), a side baffle (16) and a pressure cover (17); the circumferential surface of the main shaft (10) is provided with a stop groove (14); a key groove (15) is provided in the stop groove (14); the end of the extrusion roller (12) is inserted into the stop groove (14) and is engaged with the key groove (15); the side baffle (16) is fixedly connected to the main shaft (10); the pressure cover (17) is fixedly connected to the main shaft (10) by bolts and the end of the extrusion roller (12) is limited.

7. The fertilizer granulation roller device according to claim 6, characterized in that: A clamping block (30) is inserted into the end of the squeezing roller (12), the clamping block (30) at the end of the squeezing roller (12) is inserted into the key slot (15), the key slot (15) forms a rectangular slot, and the clamping block (30) is a rectangular column.

8. The fertilizer granulation roller device according to claim 6, characterized in that: The end of the squeezing roller (12) forms a cylinder, and a slot is provided at the end of the squeezing roller (12). The clamping block (30) is inserted into the slot, and the clamping block (30) protrudes from the circumferential surface of the squeezing roller (12).

9. The fertilizer granulation roller device according to claim 6, characterized in that: The pressure cover (17) and the side baffle (16) together form a fan-shaped plate, and the fan-shaped plate formed by the side baffle (16) and the pressure cover (17) is tangent to the circumferential surface of the extrusion roller (12). The pressure cover (17) is provided with the same anti-slip groove (14) on the wall surface close to the main shaft (10), and the two anti-slip grooves (14) together form a circular hole adapted to the end of the extrusion roller (12).

10. A method for using a fertilizer granulating roller device, characterized in that: The following steps are involved: Step 1: Loosen the screws on the gland, remove the gland (17), insert the clamp (30) into the slot at the end of the squeezing roller (12), put the end of the squeezing roller (12) into the anti-slip groove (14), and then cover the gland (17) and lock the gland (17) with bolts; Step 2: Fix the flange of the side wall of the end plate (11) and the flange of the external motor output shaft by means of screws and nuts; Step 3: Start the motor, the motor is powered on to drive the end plate (11) and the main shaft to rotate; Step 4: The main shaft drives each squeezing roller (12) to rotate in the ring die. When the storage space is facing the feeding port, the material enters the storage space and squeezes the valve (22) to deform and dent toward the squeezing roller (12) through the pressure applied by the external feeder, so that the volume of the storage space is expanded and the material enters the storage space; Step 5: As the main shaft rotates, the storage space and the feeding port of the ring die are misaligned, and the oil pressure in the storage chamber (20) pushes the plug body (24) to slide in the conveying channel (21) and push the push plate, and the push plate squeezes the valve to deform and discharge the material in the storage space to complete granulation.

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