Film coating machine for producing bio-organic fertilizer

Abstract

The invention relates to the technical field of bio-organic fertilizer coating, and discloses a bio-organic fertilizer production coating machine, which comprises a roller used for rotatably dispersing a fertilizer; the two bottom supporting rods are arranged at the bottom of the roller, and two supporting rolling wheels are arranged at the top of each bottom supporting rod and used for supporting the roller. Through the rotation of the roller and the synergistic effect of the material pushing plate and the L-shaped baffle plate, the fertilizer can be fully turned over, falls and is dispersed in the roller, so that the caking phenomenon of the fertilizer in the coating process is avoided, the surface of the fertilizer can be ensured to be in uniform contact with a coating material, and the coating effect is improved; the spraying mechanism is designed, so that the coating material can be uniformly sprayed on the fertilizer in the roller through the spray head, the spraying range is further expanded through the swinging function of the spraying pipe, the spraying uniformity and the coverage are improved, the surfaces of fertilizer particles can be more uniformly coated, and the coating quality of the fertilizer is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of bio-organic fertilizer coating, in particular to a coating machine for bio-organic fertilizer production. Background Art

[0002] In the production process of bio-organic fertilizer, coating technology is one of the key links to improve fertilizer performance. By evenly wrapping a layer of functional materials on the surface of granular organic fertilizer, the fertilizer's slow-release, anti-hygroscopicity and stability can be significantly improved, thereby extending the fertilizer's shelf life and improving its applicability under different environmental conditions.

[0003] For example, application No. 202122109166.5 discloses a bio-organic fertilizer cold coating production line, which solves the problem that the existing bio-organic fertilizer cold coating production equipment is difficult to feed, and the coating of the internal coating drum is uneven, resulting in uneven quality of organic fertilizer. The traditional organic fertilizer cold coating production equipment requires manual separation of the organic fertilizer from the inside of the coating drum during discharge, which is extremely troublesome. However, the existing bio-organic fertilizer coating equipment still has some problems in practical application, such as uneven coating, poor separation effect, and difficult maintenance. For example, in the prior art, the coating machine usually adopts a simple drum rotation method to disperse the fertilizer, but in this dispersion method, when the fertilizer follows the rotation of the drum, the agglomerated fertilizer often cannot be dispersed, resulting in uneven contact between the fertilizer particles, affecting the coating effect. Therefore, a coating machine for bio-organic fertilizer production is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a coating machine for producing biological organic fertilizer in view of the deficiencies in the above-mentioned prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a coating machine for producing bio-organic fertilizer, comprising a drum for rotating and dispersing fertilizer; and further comprising: Two bottom support rods are provided at the bottom of the drum, and two support rollers are provided on the top of each bottom support rod for supporting the drum; Two support rings are respectively connected to both sides of the outer wall of the drum and are respectively arranged to roll between the two support rings; a gear ring connected to the middle of the outer wall of the drum and connected to an external driving device for driving the drum to rotate and disperse the fertilizer; a base, connected to the bottom of the two bottom support rods; a feed hopper connected to the top of the base via a support rod and used to deliver fertilizer into the drum; a screening unit, disposed inside the drum, for separating coating materials that are not coated on the fertilizer; A turning mechanism is provided inside the drum and is used to assist in turning the fertilizer and rolling it; a spray mechanism, disposed inside the drum, for spraying the coating material into the interior of the drum; Wherein, the screening unit comprises: Two annular grooves are respectively opened on the outer wall of the drum and located on both sides of the left support ring; A screening plate is movably connected to a through hole in the annular groove on the right side and rotates with the drum to screen the coating material that is not coated on the fertilizer; The turning mechanism comprises: A plurality of pusher plates are fixedly connected to the inner wall of the drum, and the plurality of pusher plates are sequentially spirally arranged on the inner walls of the drum and the screening plate to push the fertilizer to move; A plurality of L-shaped baffles are fixedly connected to the inner wall of the drum and are arranged between two adjacent push plates. When the drum rotates, the fertilizer is driven to follow the L-shaped baffles and be turned and dispersed with the drum.

[0006] Preferably, the inner wall of the drum is tapered, and the inner tapered angle of the screen plate is the same as the tapered angle of the drum.

[0007] Preferably, the screening unit further comprises: A sliding sleeve is connected to the outer wall of the screen plate and moves in the through hole along with the screen plate; A fixing plate, fixedly connected to the inner wall of the annular groove on the right side, used to prevent the sliding sleeve from separating from the through hole; Two fixing rods are fixedly connected between the front and rear sets of support rollers; Two arc-shaped baffles are fixedly connected to the outer wall of the fixed rod through a plurality of connecting rods and are used for shielding the coating material screened out by the screening plate.

[0008] Preferably, the outer wall of the front screening plate is connected to a plurality of push rods, and the push rods are movably connected to the fixed plate, and the outer wall of the push rods is provided with a spring and connected between the fixed plate and the screening plate, for pulling the screening plate to move toward the outer wall of the drum; The inner wall of the arc-shaped baffle is connected to a limit block, and the inner wall of the limit block is in contact with the outer wall of the push rod, so as to push the push rod to move into the drum; A separation mechanism is provided in the left annular groove for separating fertilizers of different sizes.

[0009] Preferably, the separation mechanism includes: A plurality of separation holes are provided in the annular groove on the left side for separating fertilizers of different sizes; A discharge cylinder is provided on the outer wall of the drum and located on the outer wall of the separation hole for centralized discharge of materials; an arc-shaped fixing rod, fixedly connected to the top of the bottom support rod and located outside the support ring; A plurality of fixing columns, fixedly connected between the lower barrel and the arc-shaped fixing rod, for fixing the lower barrel; The discharging screw is connected to the inner wall of the drum and is located at the separation hole for discharging the material outward in a spiral manner.

[0010] Preferably, the spray mechanism comprises: A feeding pipe, fixedly connected to the outer wall of the discharge barrel, for conveying the coating material; a spray pipe, provided on the inner wall of the drum and connected to the feed pipe through a hose, for spraying the coating material into the interior of the drum; A plurality of spray heads are arranged at intervals on the front and rear sides of the outer wall of the spray pipe for spraying the coating material into the interior of the drum.

[0011] Preferably, the spray mechanism further comprises: A swing plate, one end of which is rotatably connected to the outer wall of the discharge barrel via a swing shaft, and one end of the swing shaft movably passes through the discharge barrel and extends into the interior thereof; Two arc-shaped limit plates are spaced apart and have the same center on the outer wall of the feed hopper and are located on both sides of the outer wall of the spray pipe; The roller is sleeved on the outer wall of the spray pipe and rolls between the two arc-shaped limiting plates to support the spray pipe.

[0012] Preferably, the outer wall of the blanking barrel is rotatably connected to a rotating shaft via a bearing, and one end of the rotating shaft movably passes through the blanking barrel and extends into the interior thereof; The extended end of the rotating shaft is fixedly sleeved with a half gear for driving the gear sleeved on the outer wall of the extended end of the swing shaft to rotate; A roller is fixedly sleeved on the right side of the outer wall of the rotating shaft, and the roller is rollingly connected to the outer wall of the support ring to rotate with the support ring; The brush is connected to the outer wall of the spray pipe through a plurality of elastic telescopic rods and is used for rolling the inner wall of the brush drum.

[0013] The present invention adopts the above technical solution, which can bring the following beneficial effects: 1. The bio-organic fertilizer production coating machine, through the rotation of the drum and the coordinated action of the push plate and L-shaped baffle, can fully turn over and drop the fertilizer in the drum to disperse, avoiding the agglomeration of the fertilizer during the coating process, ensuring that the fertilizer surface can evenly contact the coating material, and improving the coating effect. The design of the spray mechanism enables the coating material to be evenly sprayed onto the fertilizer inside the drum through the nozzle. The swing function of the spray tube further expands the spraying range, improves the uniformity and coverage of the spray, and makes the surface of the fertilizer particles more evenly coated, thereby enhancing the coating quality of the fertilizer.

[0014] 2. The bio-organic fertilizer production coating machine has a screening unit that can effectively separate the coating materials that are not coated on the fertilizer, avoiding the waste of excess coating materials while ensuring the purity of the fertilizer. The vibration function of the screening plate further promotes the separation of the coating materials and improves the separation efficiency and effect. The separation mechanism can screen the fertilizer according to its particle size and discharge fertilizers of different particle sizes separately, meeting the requirements of fertilizer particle size in different usage scenarios and improving the diversity and applicability of the product.

[0015] 3. The coating machine for bio-organic fertilizer production has a brush on the spray tube that can brush the inner wall of the drum and the inner wall of the screen plate when the spray tube swings, avoiding the adhesion of the coating material on the inner wall of the drum and the screen plate, reducing the frequency and workload of manual cleaning, improving the maintenance efficiency of the equipment, and extending the service life of the equipment. The vibration of the screen plate and the movement of the push rod can discharge the screened coating material in time, avoiding the accumulation of impurities in the drum, further improving the self-cleaning ability of the equipment, and ensuring the long-term stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the back structure of the present invention; Figure 3 Schematic diagram of the cross-sectional structure of the screening unit of the present invention; Figure 4 This is a schematic diagram of the internal structure of the drum of the present invention; Figure 5 This is a schematic diagram of the explosion structure of the screening unit of the present invention; Figure 6 Schematic diagram of the internal cross-sectional structure of the drum of the present invention; Figure 7 This is a schematic diagram of the exploded cross-section of the separation mechanism of the present invention; Figure 8 For the present invention Figure 7 A in the middle is an enlarged structural diagram; Figure 9 For the present invention Figure 8Enlarged structural diagram at point B in the middle.

[0017] Figure: 1, roller; 2, support ring; 3, gear ring; 4, support roller; 5, bottom support rod; 6, screening unit; 61, screening plate; 62, sliding sleeve; 63, fixed plate; 64, push rod; 65, spring; 66, fixed rod; 67, connecting rod; 68, arc baffle; 69, limit block; 610, separation mechanism; 6101, separation hole; 6102, discharge barrel; 6103, arc fixed rod; 6104, fixed column; 6105 , discharging screw; 7, flipping mechanism; 71, pushing plate; 72, L-shaped baffle; 8, spray mechanism; 81, feeding pipe; 82, swing plate; 83, spray pipe; 84, arc-shaped limit plate; 85, roller; 86, hose; 87, swing shaft; 88, rotating shaft; 89, roller; 810, half gear; 811, gear; 812, nozzle; 813, elastic telescopic rod; 814, brush; 9, feeding hopper; 10, base; 11, support rod. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-9 One embodiment of the present invention is: a coating machine for producing bio-organic fertilizer, comprising a drum 1 for rotating and dispersing fertilizer; and further comprising: Two bottom support rods 5 are provided at the bottom of the drum 1, and two support rollers 4 are provided on the top of each bottom support rod 5 for supporting the drum 1; Two support rings 2 are connected to both sides of the outer wall of the drum 1 and are respectively arranged to roll between the two support rings 2; The gear ring 3 is connected to the middle of the outer wall of the drum 1 and is connected to an external driving device to drive the drum 1 to rotate and disperse the fertilizer; A base 10 connected to the bottom of the two bottom support rods 5; The feed hopper 9 is connected to the top of the base 10 via a support rod 11 and is used to transport fertilizer into the drum 1; The screening unit 6 is provided inside the drum 1 and is used to separate the coating material that is not coated on the fertilizer; The turning mechanism 7 is arranged inside the drum 1 and is used to assist in turning the fertilizer and rolling; The spray mechanism 8 is provided inside the drum 1 and is used to spray the coating material into the drum 1; Among them, the screening unit 6 includes: Two annular grooves are respectively opened on the outer wall of the drum 1 and located on both sides of the left support ring 2; The screening plate 61 is movably connected to the through hole in the right annular groove and rotates with the drum 1 to screen the coating material that is not coated on the fertilizer; The turning mechanism 7 comprises: Multiple pusher plates 71 are fixedly connected to the inner wall of the drum 1, and the multiple pusher plates 71 are sequentially spirally arranged on the inner wall of the drum 1 and the screening plate 61 to push the fertilizer to move; A plurality of L-shaped baffles 72 are fixedly connected to the inner wall of the drum 1 and are arranged between two adjacent push plates 71 , so as to move the fertilizer to follow the L-shaped baffles 72 and to be turned and dispersed with the drum 1 when the drum 1 rotates.

[0020] The inner wall of the drum 1 is tapered, and the inner tapered angle of the screening plate 61 is the same as that of the drum 1 .

[0021] The screening unit 6 also includes: The sliding sleeve 62 is connected to the outer wall of the screening plate 61 and moves in the through hole along with the screening plate 61; A fixing plate 63 is fixedly connected to the inner wall of the right annular groove and is used to prevent the sliding sleeve 62 from being separated from the through hole; Two fixing rods 66 are fixedly connected between the front and rear sets of support rollers 4; Two arc-shaped baffles 68 are fixedly connected to the outer wall of the fixed rod 66 through a plurality of connecting rods 67 to block the coating material screened out by the screening plate 61.

[0022] The outer wall of the front screening plate 61 is connected to a plurality of push rods 64, and the push rods 64 are movably connected to the fixed plate 63. The outer wall of the push rods 64 is provided with a spring 65, and is connected between the fixed plate 63 and the screening plate 61, for pulling the screening plate 61 to move toward the outer wall of the drum 1; The inner wall of the arc-shaped baffle 68 is connected to the limit block 69, and the inner wall of the limit block 69 is in contact with the outer wall of the push rod 64, so as to push the push rod 64 to move into the drum 1; A separation mechanism 610 is provided in the left annular groove for separating fertilizers of different sizes.

[0023] The separation mechanism 610 includes: A plurality of separation holes 6101 are provided in the left annular groove for separating fertilizers of different sizes; The discharge barrel 6102 is provided on the outer wall of the drum 1 and is located on the outer wall of the separation hole 6101 for centralized discharge of materials; The arc-shaped fixing rod 6103 is fixedly connected to the top of the bottom support rod 5 and is located outside the support ring 2; A plurality of fixing columns 6104 are fixedly connected between the lower barrel 6102 and the arc-shaped fixing rod 6103 to fix the lower barrel 6102; The discharging screw 6105 is connected to the inner wall of the drum 1 and is located at the separation hole 6101 for discharging the material outward in a spiral manner.

[0024] The spray mechanism 8 comprises: The feed pipe 81 is fixedly connected to the outer wall of the discharge barrel 6102 and is used to transport the coating material; The spray pipe 83 is provided on the inner wall of the drum 1 and is connected to the feed pipe 81 through a hose 86 for spraying the coating material into the interior of the drum 1; A plurality of nozzles 812 are arranged at intervals on the front and rear sides of the outer wall of the spray pipe 83 for spraying the coating material into the interior of the drum 1 .

[0025] The spray mechanism 8 also includes: One end of the swing plate 82 is rotatably connected to the outer wall of the discharge barrel 6102 via a swing shaft 87, and one end of the swing shaft 87 movably penetrates the discharge barrel 6102 and extends into the interior thereof; Two arc-shaped limiting plates 84 are spaced apart and have the same center on the outer wall of the feed hopper 9 and are located on both sides of the outer wall of the spray pipe 83; The roller 85 is sleeved on the outer wall of the spray tube 83 and rolls between the two arc-shaped limiting plates 84 to support the spray tube 83 .

[0026] The outer wall of the discharge barrel 6102 is rotatably connected to a rotating shaft 88 via a bearing, and one end of the rotating shaft 88 movably passes through the discharge barrel 6102 and extends into the interior thereof; The extended end of the rotating shaft 88 is fixedly sleeved with a half gear 810, which is used to drive the gear 811 sleeved on the outer wall of the extended end of the swing shaft 87 to rotate; The roller 89 is fixedly sleeved on the right side of the outer wall of the rotating shaft 88, and the roller 89 is rollingly connected to the outer wall of the support ring 2 to rotate with the support ring 2; The brush 814 is connected to the outer wall of the spray pipe 83 through multiple elastic telescopic rods 813 and is used to roll and brush the inner wall of the drum 1.

[0027] Working Principle: Bio-organic fertilizer coating is a process of evenly coating the surface of granular organic fertilizer with a layer of functional material to improve fertilizer properties (such as slow-release, anti-hygroscopicity, stability, etc.). When producing bio-organic fertilizer, granular fertilizer is fed into the feed hopper 9 at one end of the drum 1. At this time, the gear ring 3 is driven to rotate by an external drive device, which in turn drives the drum 1 to rotate and rotate on the outer wall of the support roller 4 through the support ring 2, so that the fertilizer is evenly dispersed as the drum rotates; At this time, when the drum 1 rotates, it will drive multiple push plates 71 to rotate synchronously and spirally, thereby pushing the fertilizer to the left, and when the drum 1 rotates, it will drive multiple L-shaped baffles 72 to rotate. At this time, the L-shaped baffles 72 can be rotated to synchronously drive the fertilizer to rotate with the drum 1, thereby driving the fertilizer to roll and follow the drum to roll upward and fall to a high place and hit the drum 1 to break, thereby avoiding the fertilizer from clumping during coating and promoting the turning of the fertilizer to achieve uniform coating. Furthermore, when the fertilizer is turning, the material to be coated is introduced through the feed pipe 81 and introduced into the spray pipe 83 through the hose 86, and then sprayed through the nozzle 812 and enters the drum 1 to be coated with the fertilizer; Furthermore, when the drum 1 rotates, it drives the support ring 2 to rotate. At this time, the support ring 2 drives the roller 89 on its outer wall to rotate, thereby driving the rotating shaft 88 to rotate, and at this time, the half gear 810 is driven to engage the drive gear 811 to rotate, thereby driving the swing shaft 87 to swing, thereby synchronously driving the swing plate 82 to deflect, and when the half gear 810 is disengaged from the gear 811, the swing shaft 87 and the swing plate 82 are reset, thereby continuously swinging around the swing shaft 87, and when the swing plate 82 swings, it drives the spray tube 83 to deflect, and the spray tube 83 and the roller 85 to swing between the two arc-shaped limit plates 84, thereby changing the spraying position of the spray tube 83, thereby improving the spraying range and effect. At the same time, when the spray tube 83 swings, it drives the multiple elastic telescopic rods 813 and the brush 814 to deflect, thereby brushing the inner wall of the drum 1 and the inner wall of the screen plate 61, preventing the coating material from adhering to the inner wall of the drum 1 and the inner wall of the screen plate 61, thereby achieving the purpose of self-cleaning; At the same time, when the drum 1 rotates, it will synchronously drive the screening plate 61 to rotate, first of all, the material that is not completely coated can fall outward along the screening plate 61, so as to achieve the purpose of separating the coated material, and when the screening plate 61 is rotating, it will drive multiple push rods 64 to rotate, and after contacting the limit block 69, it will resist the movement of the push rod 64, and then push the screening plate 61 to move toward the inside of the drum 1, so as to promote the separation of the coated material, and when the push rod 64 is out of contact with the limit block 69, under the action of the spring 65, it directly pulls the screening plate 61 to move and generate vibration, thereby further promoting the separation of the coated material and improving the separation effect, and the coated material screened by the screening plate 61 will hit the arc-shaped baffle 68, so as to block the coated material and make it slide down in a concentrated manner; Furthermore, when the drum 1 rotates, it will also drive the fertilizer to move through the discharging screw 6105, and then push the fertilizer outward to achieve the purpose of discharging. In the process of discharging outward, the rolling drum 1 separates fertilizers of different particle sizes at the separation hole 6101, and the separated fertilizers are discharged through the discharge barrel 6102, while the fertilizers that do not pass through the separation hole 6101 are discharged outward through the left side of the drum 1, thereby achieving the separation of two fertilizers with different particle sizes after being coated to meet different usage requirements.

[0028] The present invention provides a coating machine for producing bio-organic fertilizer. There are many methods and approaches to specifically implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the scope of protection of the present invention. Each component not clearly defined in this embodiment can be implemented using existing technology.

Claims

1. A coating machine for producing bio-organic fertilizer, comprising a drum for rotating and dispersing fertilizer; characterized in that: Also includes: Two bottom support rods are provided at the bottom of the drum, and two support rollers are provided on the top of each bottom support rod for supporting the drum; Two support rings are respectively connected to both sides of the outer wall of the drum and are respectively arranged to roll between the two support rings; a gear ring connected to the middle of the outer wall of the drum and connected to an external driving device for driving the drum to rotate and disperse the fertilizer; a base, connected to the bottom of the two bottom support rods; a feed hopper connected to the top of the base via a support rod and used to deliver fertilizer into the drum; a screening unit, disposed inside the drum, for separating coating materials that are not coated on the fertilizer; A turning mechanism is provided inside the drum and is used to assist in turning the fertilizer and rolling it; a spray mechanism, disposed inside the drum, for spraying the coating material into the interior of the drum; Wherein, the screening unit comprises: Two annular grooves are respectively opened on the outer wall of the drum and located on both sides of the left support ring; A screening plate is movably connected to a through hole in the annular groove on the right side and rotates with the drum to screen the coating material that is not coated on the fertilizer; The turning mechanism comprises: A plurality of pusher plates are fixedly connected to the inner wall of the drum, and the plurality of pusher plates are sequentially spirally arranged on the inner walls of the drum and the screening plate to push the fertilizer to move; A plurality of L-shaped baffles are fixedly connected to the inner wall of the drum and are arranged between two adjacent push plates. When the drum rotates, the fertilizer is driven to follow the L-shaped baffles and be turned and dispersed with the drum.

2. A bio-organic fertilizer production coating machine according to claim 1, characterized in that: The inner wall of the drum is tapered, and the inner tapered angle of the screen plate is the same as that of the drum.

3. A bio-organic fertilizer production coating machine according to claim 2, characterized in that: The screening unit further comprises: A sliding sleeve is connected to the outer wall of the screen plate and moves in the through hole along with the screen plate; A fixing plate, fixedly connected to the inner wall of the annular groove on the right side, used to prevent the sliding sleeve from separating from the through hole; Two fixing rods are fixedly connected between the front and rear sets of support rollers; Two arc-shaped baffles are fixedly connected to the outer wall of the fixed rod through a plurality of connecting rods and are used for shielding the coating material screened out by the screening plate.

4. A bio-organic fertilizer production coating machine according to claim 3, characterized in that: The outer wall of the front screening plate is connected to a plurality of push rods, and the push rods are movably connected to the fixed plate. The outer wall of the push rod is provided with a spring and is connected between the fixed plate and the screening plate to pull the screening plate to move toward the outer wall of the drum. The inner wall of the arc-shaped baffle is connected to a limit block, and the inner wall of the limit block is in contact with the outer wall of the push rod, so as to push the push rod to move into the drum; A separation mechanism is provided in the left annular groove for separating fertilizers of different sizes.

5. A bio-organic fertilizer production coating machine according to claim 4, characterized in that: The separation mechanism comprises: A plurality of separation holes are provided in the annular groove on the left side for separating fertilizers of different sizes; A discharge cylinder is provided on the outer wall of the drum and located on the outer wall of the separation hole for centralized discharge of materials; an arc-shaped fixing rod, fixedly connected to the top of the bottom support rod and located outside the support ring; A plurality of fixing columns, fixedly connected between the lower barrel and the arc-shaped fixing rod, for fixing the lower barrel; The discharging screw is connected to the inner wall of the drum and is located at the separation hole for discharging the material outward in a spiral manner.

6. A bio-organic fertilizer production coating machine according to claim 5, characterized in that: The spray mechanism comprises: A feeding pipe, fixedly connected to the outer wall of the discharge barrel, for conveying the coating material; a spray pipe, provided on the inner wall of the drum and connected to the feed pipe through a hose, for spraying the coating material into the interior of the drum; A plurality of spray heads are arranged at intervals on the front and rear sides of the outer wall of the spray pipe for spraying the coating material into the interior of the drum.

7. A bio-organic fertilizer production coating machine according to claim 6, characterized in that: The spray mechanism also includes: A swing plate, one end of which is rotatably connected to the outer wall of the discharge barrel via a swing shaft, and one end of the swing shaft movably passes through the discharge barrel and extends into the interior thereof; Two arc-shaped limit plates are spaced apart and have the same center on the outer wall of the feed hopper and are located on both sides of the outer wall of the spray pipe; The roller is sleeved on the outer wall of the spray pipe and rolls between the two arc-shaped limiting plates to support the spray pipe.

8. A bio-organic fertilizer production coating machine according to claim 7, characterized in that: The outer wall of the discharge barrel is rotatably connected to a rotating shaft via a bearing, and one end of the rotating shaft movably passes through the discharge barrel and extends into the interior thereof; The extended end of the rotating shaft is fixedly sleeved with a half gear for driving the gear sleeved on the outer wall of the extended end of the swing shaft to rotate; A roller is fixedly sleeved on the right side of the outer wall of the rotating shaft, and the roller is rollingly connected to the outer wall of the support ring to rotate with the support ring; The brush is connected to the outer wall of the spray pipe through a plurality of elastic telescopic rods and is used for rolling the inner wall of the brush drum.

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