Drying and screening system for granular pet food

Abstract

The invention discloses a drying and screening system for granular pet food, and relates to the technical field of pet food processing.The drying and screening system is characterized in that a brake shaft is in transmission connection with a screening mesh belt through a traction roll shaft, and brake toothed belts meshed with brake gears are symmetrically arranged on the two sides of the belt surface of the screening mesh belt; and a screening roller grinding mechanism opposite to the screening mesh belt is arranged in the box body of the screening box. According to the design, when the particle pet food is pushed and screened forwards, a first material turning roller and a second material turning roller in the screening roller grinding mechanism are pushed to circularly rotate forwards and backwards based on the forward pushing force of the screening net belt, the screening net belt is circularly supported, the particle pet food on the screening net belt is pushed to circularly and dynamically fluctuate leftwards and rightwards, and unqualified products such as powder are screened out; the particle pet food screening device has more gentle screening performance, collision during particle pet food screening can be effectively reduced, the screening integrity of particle pet food is ensured, and the screening quality is improved.

Description

Technical Field

[0001] The invention relates to the field of pet food processing, in particular to a drying and screening system for granular pet food. Background Art

[0002] With the popularization of scientific pet-raising concepts among consumers, the promotion of pet food has become more and more extensive. As food specially provided for pets, pet food is loved by consumers because of its comprehensive nutrition, high digestion and absorption rate, scientific formula, convenient feeding and the ability to prevent certain diseases. In addition, since pet food runs through the entire life cycle of pets, its daily demand is huge and the market prospects are particularly promising.

[0003] Pet food is mainly divided into two types: dry food and wet food. Dry food is usually processed and produced in granular form, such as dog food, cat food and other pet food. Usually, freeze-drying, air-drying and other methods are used to dry and shape the granular pet food so that it can be packed and sold. However, since there are inevitably unqualified products such as powder in the production and processing of granular pet food, direct packing is likely to affect the sales quality. Therefore, after the granular pet food is produced and granulated, a screening system is usually used for pre-screening. For example, a pet food granule forming drying screening system (public announcement number CN116475056A) disclosed in the China Patent Network shows that this type of device uses a screening cylinder assembly, a screening liner assembly and a horizontal rocker arm assembly to form a complete set of screening units for pet food granules after forming and drying, which realizes the reciprocating vibration screening of pet food granules in the horizontal direction. However, there are still some shortcomings in the above-mentioned patent disclosure and the pet food particle screening system adopted in the existing market: the existing method of screening pet food particles by reciprocating vibration can screen out unqualified products such as powder in pet food, but the collision and loading between them can also easily break the qualified products by vibration screening, resulting in low screening quality of pet food particles and high scrap rate. To this end, those skilled in the art provide a drying and screening system for granular pet food to solve the problems raised in the above-mentioned background technology. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a drying and screening system for granular pet food, which solves the problems of relatively low screening quality and high scrap rate of the existing granular pet food screening system proposed in the above background art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A drying and screening system for granular pet food, comprising two sets of screening and transmission racks facing each other horizontally; Braking shafts are installed at both ends of the bracket of the screening transmission frame, a traction roller is arranged in the middle of the shaft of the braking shaft, and the braking shaft is connected to the screening mesh belt through the traction roller, and braking gears are symmetrically arranged on both sides of the shaft of the braking shaft opposite to the traction roller, and braking toothed belts meshing with the braking gears are symmetrically arranged on both sides of the belt surface of the screening mesh belt; A screening box is arranged inside the screening transmission frame support along the transmission direction of the screening mesh belt, and a screening roller grinding mechanism opposite to the screening mesh belt is arranged inside the screening box; A brake motor is installed at one end of the bottom frame of the screening transmission frame, and a flap loading mechanism is installed at one end of the top frame of the screening transmission frame. The brake motor, the flap loading mechanism and the brake shaft are connected through a brake belt transmission.

[0006] As a further technical solution of the present invention: the belt surface of the screening mesh belt is arranged in an array with multiple groups of screening holes, and the screening holes are horizontally opposite to the box opening of the screening box.

[0007] As a further technical solution of the present invention: the brake toothed belt includes a transmission rack meshing with the brake gear and a material limiting barrier belt protruding upwardly from the surface of the screening mesh belt, and the brake toothed belt is integrally connected to the screening mesh belt.

[0008] As a further technical solution of the present invention: the screening roller grinding mechanism includes a plurality of first aggregate box frames and second aggregate box frames which are arranged in a staggered manner in sequence inside the screening box body, the first aggregate box frame is rotatably connected to a first transmission shaft opposite to the brake toothed belt in the middle of the chamber, and a first turning roller for supporting the screening mesh belt is sleeved on the outer side of the shaft of the first transmission shaft, a first grinding wire tooth is arranged at the bottom of the first aggregate box frame, the second aggregate box frame is rotatably connected to a second transmission shaft opposite to the brake toothed belt in the middle of the chamber, and a second turning roller for supporting the screening mesh belt is sleeved on the outer side of the shaft of the second transmission shaft, and a second grinding wire tooth is arranged at the bottom of the second aggregate box frame.

[0009] As a further technical solution of the present invention: first transmission gears are installed at both ends of the shaft of the first transmission shaft, and the first transmission gear is connected to the brake toothed belt through a first linkage gear installed on the screening box; Second transmission gears are installed at both ends of the shaft of the second transmission shaft, one side of the second transmission gear is meshedly connected with a transfer gear installed on the screening box, and the second transmission gear is connected to the brake belt transmission through a second linkage gear installed on the screening box.

[0010] As a further technical solution of the present invention: the first turning roller is a 90° roller shaft structure, and the first turning roller includes a first turning roller and a first pushing thread tooth arranged on the first turning roller, the first pushing thread tooth and the first grinding thread tooth are meshed with each other, and the first pushing thread tooth and the first grinding thread tooth are both spiral structures; The second turning roller is a 90° roller shaft structure, and the second turning roller includes a second turning roller and a second pushing wire tooth arranged on the second turning roller, the second pushing wire tooth and the second grinding wire tooth are meshed with each other, and the second pushing wire tooth and the second grinding wire tooth are both spiral structures.

[0011] As a further technical solution of the present invention: a plurality of groups of slag discharge pipe openings which are opposite to and communicate with the first aggregate box frame and the second aggregate box frame are arranged on one side of the box body of the screening box.

[0012] As a further technical solution of the present invention: a loading guide platform horizontally opposite to the screening mesh belt is installed on one side of the screening box body, and a discharging guide platform horizontally opposite to the screening mesh belt is installed on the other side of the screening box body.

[0013] As a further technical solution of the present invention: the flip-plate loading mechanism includes a flip bin and a loading bin opening which are integrally connected, a rotating shaft is rotatably connected inside the bin body of the flip bin, and a plurality of unloading flip plates are arranged along the circumference of the shaft of the rotating shaft.

[0014] As a further technical solution of the present invention: a first pulley is provided at one end of the output shaft of the brake motor, a second pulley is provided at one end of the rotating shaft of the flip feeding mechanism, a third pulley is provided at one end of the shaft rod of the brake shaft, and the first pulley, the second pulley and the third pulley are connected by a brake belt transmission.

[0015] The present invention provides a drying and screening system for granular pet food, which has the following beneficial effects compared with the prior art: 1. When the screening system of this design performs the screening process for the granular pet food, the brake motor is used as the driving source. On the one hand, it drives the flip-plate loading mechanism to operate and quantitatively loads the granular pet food onto the screening mesh belt. On the other hand, it pushes the granular pet food on the screening mesh belt forward to perform the screening process. While the granular pet food is being pushed forward, based on the forward thrust of the screening mesh belt, the first flipping roller and the second flipping roller in the screening roller mill mechanism are driven to rotate in a forward and reverse cycle, and the screening mesh belt is supported in a cycle, and the granular pet food on the screening mesh belt is pushed to circulate left and right to dynamically fluctuate, and unqualified products such as powder are screened out. It has a smoother screening performance, can effectively reduce the collision during the screening of granular pet food, ensure the screening integrity of the granular pet food, and improve the screening quality.

[0016] 2. When screening granular pet food, the screening system of this design is based on the cyclic rotation of the first turning roller and the second turning roller in the screening roller grinding mechanism. While screening the granular pet food, it also cyclically meshes with the first grinding teeth and the second grinding teeth to perform a synchronous grinding process on unqualified pet food, and spirally pushes out the unqualified pet food after grinding, thereby reducing the intensity of subsequent recycling operations, improving the multi-linkage of the screening system, and being more conducive to promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of a drying and screening system for granular pet food; Figure 2 A partial cross-sectional view of a dry screening system for granular pet food; Figure 3 A schematic diagram of the transmission of a screening mesh belt in a dry screening system for granular pet food; Figure 4 A schematic diagram of the structure of a screening roller mill mechanism in a dry screening system for granular pet food; Figure 5 A partial cross-sectional view of a screening roller mill mechanism in a dry screening system for granular pet food; Figure 6 The present invention is a schematic diagram of the structure of a flap loading mechanism in a dry screening system for granular pet food.

[0018] In the figure: 1, screening transmission frame; 2, slag discharge pipe; 3, brake belt; 4, brake motor; 41, first pulley; 5, flap loading mechanism; 51, flip bin; 52, loading bin opening; 53, rotating shaft; 54, second pulley; 55, unloading flap; 6, brake shaft; 61, third pulley; 7, screening mesh belt; 8, screening row holes; 9, screening box; 10, brake gear; 11, brake tooth belt; 111, transmission rack; 112, material limit stop belt; 12, first linkage gear; 13, second linkage gear Wheel; 14, traction roller shaft; 15, feeding guide platform; 16, unloading guide platform; 17, first collection box frame; 18, first turning roller; 181, first flip roller; 182, first push thread; 19, second collection box frame; 20, second turning roller; 201, second flip roller; 202, second push thread; 21, first transmission gear; 22, transfer gear; 23, second transmission gear; 24, first transmission shaft; 25, first grinding thread; 26, second transmission shaft; 27, second grinding thread. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-6 The present invention provides a technical solution for a drying and screening system of granular pet food: a drying and screening system of granular pet food, comprising two sets of screening and transmission frames 1 opposite to each other horizontally, a brake motor 4 is installed at one end of the bottom frame of the screening and transmission frame 1, and a flap loading mechanism 5 is installed at one end of the top frame of the screening and transmission frame 1, the brake motor 4, the flap loading mechanism 5, and the brake shaft 6 are connected by a brake belt 3, a first pulley 41 is arranged at one end of the output shaft of the brake motor 4, a second pulley 54 is arranged at one end of the rotating shaft of the flap loading mechanism 5, a third pulley 61 is arranged at one end of the shaft rod of the brake shaft 6, and the first pulley 41, the second pulley 54, and the third pulley 61 are connected by the brake belt 3, by controlling the brake motor 4 as a power source, and under the corresponding first pulley 41, the second pulley 54, the third pulley 61 are connected with the brake belt 3, the corresponding components are driven to operate, and the granular pet food is screened and ground into an integrated processing step.

[0021] The flip-plate loading mechanism 5 includes a flipping bin 51 and a loading bin opening 52 which are integrally connected. A rotating shaft 53 is rotatably connected inside the bin body of the flipping bin 51, and a plurality of groups of unloading flaps 55 are arranged along the circumference of the shaft of the rotating shaft 53. The combination of the loading bin opening 52 and the flipping bin 51 in the flipping loading mechanism 5 is used as a loading hopper. Under the combination of the rotating shaft 53 and the unloading flap 55, the granular pet food is quantitatively flipped and unloaded and spread on the screening mesh belt 7 to improve the smoothness and comprehensiveness of the screening of the granular pet food.

[0022] Braking shafts 6 are installed at both ends of the bracket of the screening transmission frame 1, and a traction roller 14 is arranged in the middle of the shaft of the braking shaft 6, and the braking shaft 6 is connected to the screening mesh belt 7 through the traction roller 14. The belt surface of the screening mesh belt 7 is arranged in an array form with multiple groups of screening holes 8, and the screening holes 8 are horizontally opposite to the box opening of the screening box 9. By arranging the screening holes 8 on the screening mesh belt 7, the granular pet food pushed on the screening mesh belt 7 is screened, and the unqualified pet food such as powder is screened into the screening box 9 for integrated collection and processing.

[0023] The shaft of the brake shaft 6 is symmetrically provided with brake gears 10 on both sides opposite to the traction roller shaft 14, and the belt surface of the screening mesh belt 7 is symmetrically provided with brake toothed belts 11 meshing with the brake gears 10 on both sides. The brake toothed belt 11 includes a transmission rack 111 meshing with the brake gear 10 and a material limiting barrier belt 112 protruding upward from the belt surface of the screening mesh belt 7. The brake toothed belt 11 is integrally connected with the screening mesh belt 7. By utilizing the meshing transmission of the brake toothed belt 11 and the brake gear 10, it can be used as a power source. On the one hand, it can push the screening mesh belt 7 forward smoothly, and on the other hand, it can promote the linkage operation of the screening roller mill mechanism. By setting the brake toothed belt 11 to be higher than the screening mesh belt 7, the granular pet food on the screening mesh belt 7 can be prevented from being spilled.

[0024] A screening box 9 is arranged inside the bracket of the screening transmission frame 1 along the transmission direction of the screening mesh belt 7, and a screening roller grinding mechanism opposite to the screening mesh belt 7 is arranged inside the box body of the screening box 9. The screening roller grinding mechanism includes a plurality of first material collection box frames 17 and second material collection box frames 19 arranged in a staggered manner in sequence inside the box body of the screening box 9. A first transmission shaft 24 opposite to the brake toothed belt 11 is rotatably connected to the middle of the chamber of the first material collection box frame 17, and a first turning roller 18 for supporting the screening mesh belt 7 is sleeved on the outer side of the shaft rod of the first transmission shaft 24. Both ends of the shaft rod of the first transmission shaft 24 are A first transmission gear 21 is installed, and the first transmission gear 21 is connected to the brake belt 11 through the first linkage gear 12 installed on the screening box 9. While the brake belt 11 is transmitting, the first linkage gear 12 is used to drive the first transmission gear 21 to rotate synchronously, and then the combination of the first transmission shaft 24 and the first turning roller 18 is driven to rotate synchronously along the transmission direction of the brake belt 11. While the first turning roller 18 is cyclically flipped, the screening mesh belt 7 is supported to promote the dynamic fluctuation of the granular pet food on its belt surface, thereby improving the screening efficiency of the granular pet food.

[0025] The middle part of the chamber of the second collecting box frame 19 is rotatably connected with a second transmission shaft 26 opposite to the brake toothed belt 11, and a second turning roller 20 that supports the screening mesh belt 7 is sleeved on the outer side of the shaft of the second transmission shaft 26. Second transmission gears 23 are installed at both ends of the shaft of the second transmission shaft 26. One side of the second transmission gear 23 is meshingly connected with a transfer gear 22 installed on the screening box 9, and the second transmission gear 23 is connected to the brake toothed belt 11 through a second linkage gear 13 installed on the screening box 9. While the brake toothed belt 11 is transmitting, the transfer transmission of the second linkage gear 13 is utilized. Under the steering transmission of the transfer gear 22, the second transmission gear 23 is driven to rotate synchronously, and then the combination of the second transmission shaft 26 and the second turning roller 20 is driven to rotate synchronously in the opposite direction of the transmission direction of the brake toothed belt 11. While the second turning roller 20 is cyclically flipped, the screening mesh belt 7 is supported to promote the dynamic fluctuation of the granular pet food on its belt surface, thereby improving the granular pet food screening efficiency.

[0026] The first material collecting box frame 17 is provided with a first grinding thread 25 at the bottom of the box, the first material turning roller 18 is a 90° roller shaft structure, and the first material turning roller 18 includes a first turning roller 181 and a first material pushing thread 182 arranged on the first turning roller 181, the first material pushing thread 182 and the first grinding thread 25 are meshed with each other, and the first material pushing thread 182 and the first grinding thread 25 are both spiral structures, by setting the first material pushing thread 182 of the first material turning roller 18 to be higher than the screening box 9 The protruding part of the thread teeth is used to circularly support the screening mesh belt 7, thereby pushing the pet granular food on its belt surface to dynamically fluctuate and flow along the surface of the screening mesh belt 7. While flowing, the unqualified products wrapped inside are screened into the first collecting box frame 17, and then the first pushing thread teeth 182 on the first turning roller 18 are spirally engaged with the first grinding thread teeth 25 to spirally grind and push the unqualified pet food, so that the unqualified pet food can be directly ground and processed to reduce the subsequent control intensity.

[0027] The second material collecting box frame 19 is provided with a second grinding thread 27 at the bottom of the box, the second material turning roller 20 is a 90° roller shaft structure, and the second material turning roller 20 includes a second flip roller 201 and a second material pushing thread 202 arranged on the second flip roller 201, the second material pushing thread 202 and the second grinding thread 27 are meshed with each other, and the second material pushing thread 202 and the second grinding thread 27 are both spiral structures, by setting the second material pushing thread 202 of the second material turning roller 20 to be higher than the screening box 9 The protruding part of the wire teeth is used to circularly support the screening mesh belt 7, thereby pushing the pet granular food on its belt surface to dynamically fluctuate and flow along the surface of the screening mesh belt 7. While flowing, the unqualified products wrapped inside are screened into the second collecting box frame 19, and then the second pushing wire teeth 202 on the second turning roller 20 are spirally engaged with the second grinding wire teeth 27 to spirally grind and push the unqualified pet food, so that the unqualified pet food can be directly ground and processed to reduce the subsequent control intensity.

[0028] One side of the screening box 9 is provided with a plurality of groups of slag discharge pipe openings 2 which are conductively opposite to the first aggregate box frame 17 and the second aggregate box frame 19; one side of the screening box 9 is provided with a loading guide platform 15 which is horizontally opposite to the screening mesh belt 7; and the other side of the screening box 9 is provided with a unloading guide platform 16 which is horizontally opposite to the screening mesh belt 7. The screening box 9 is used to collect unqualified pet food, and the unqualified pet food is collected in the first aggregate box frame 17 and the second aggregate box frame 19, and after being ground, is discharged in sequence through the slag discharge pipe openings 2. By arranging the loading guide platform 15 and the unloading guide platform 16 on both sides of the screening box 9, the transmission and braking stability of the screening mesh belt 7 can be improved.

[0029] The working principle of the present invention is as follows: when the granular pet food after drying and processing is screened by the screening system, the granular pet food to be screened is circulated and added into the flap loading mechanism 5, and then the brake motor 4 is controlled to work. Under the transmission of the brake belt 3, as a power source, on the one hand, it drives the combined operation of the rotating shaft 53 and the unloading flap 55 in the flap loading mechanism 5 to quantitatively flip and unload the granular pet food and lay it on the screening mesh belt 7 for the screening process; on the other hand, it drives the combined operation of the brake shaft 6, the brake gear 10, and the traction roller shaft 14 to promote the synchronous operation of the screening mesh belt 7 and the brake tooth belt 11, and push the granular pet food forward for the screening process; While the brake toothed belt 11 is further transmitted, on the one hand, the transfer transmission of the first linkage gear 12 is used to drive the first transmission gear 21 to rotate synchronously, and then the combination of the first transmission shaft 24 and the first turning roller 18 is driven to rotate synchronously along the transmission direction of the brake toothed belt 11. While the first turning roller 18 is cyclically turned over, the screening mesh belt 7 is supported to promote the dynamic fluctuation of the granular pet food on its belt surface. On the other hand, the transfer transmission of the second linkage gear 13 is used to drive the second transmission gear 23 to rotate synchronously under the steering transmission of the transfer gear 22, and then the combination of the second transmission shaft 26 and the second turning roller 20 is driven to rotate synchronously in the opposite direction of the transmission direction of the brake toothed belt 11, and while the second turning roller 20 is cyclically turned over, the screening mesh belt 7 is supported to promote the dynamic fluctuation of the granular pet food on its belt surface, forming a left-right relative support and pushing state, dynamically pushing the granular pet food on the screening mesh belt 7, and screening through the screening holes 8 on its belt surface, the screening is smoother, the screening is more stable, and the collision scrap rate is lower; While the granular pet food is being screened, the unqualified pet food is screened into the screening box 9 and falls into the corresponding first collecting box frame 17 and the second collecting box frame 19. During the cyclic turning and supporting process of the first turning roller 18 and the second turning roller 20, the first pushing thread 182 on the first turning roller 18 and the first grinding thread 25 are spirally meshed to push the unqualified pet food in the first collecting box frame 17 to spirally grind and push, and the second pushing thread 202 on the second turning roller 20 and the first grinding thread 25 are synchronously meshed to push the unqualified pet food in the first collecting box frame 17 to spirally grind and push. The spiral meshing of the second grinding wire teeth 27 pushes the unqualified pet food through the spiral grinding, and the unqualified pet food is directly ground and processed, and gradually discharged through the slag discharge pipe 2 under the action of the spiral pushing, while the qualified granular pet food is circulated and unloaded through the other end under the circulation transmission of the screening mesh belt 7, so that the granular pet food is subjected to a more gentle and stable screening process, and at the same time, the unqualified products screened out are ground in a linkage form, thereby improving the integrated linkage performance and enhancing the versatility of the screening system.

[0030] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A drying and screening system for granular pet food, characterized in that: It comprises two sets of screening and transmission frames (1) facing each other horizontally; Braking shafts (6) are installed at both ends of the bracket of the screening transmission frame (1), a traction roller (14) is arranged in the middle of the shaft of the braking shaft (6), and the braking shaft (6) is connected to the screening mesh belt (7) through the traction roller (14), and braking gears (10) are symmetrically arranged on both sides of the shaft of the braking shaft (6) opposite to the traction roller (14), and braking toothed belts (11) meshing with the braking gears (10) are symmetrically arranged on both sides of the belt surface of the screening mesh belt (7); A screening box (9) is arranged inside the screening transmission frame (1) along the transmission direction of the screening mesh belt (7), and a screening roller grinding mechanism is arranged inside the screening box (9) opposite to the screening mesh belt (7); A brake motor (4) is installed at one end of the bottom frame of the screening transmission frame (1), and a flap loading mechanism (5) is installed at one end of the top frame of the screening transmission frame (1); the brake motor (4), the flap loading mechanism (5) and the brake shaft (6) are connected to each other through a brake belt (3).

2. A drying and screening system for granular pet food according to claim 1, characterized in that: The belt surface of the screening mesh belt (7) is provided with a plurality of groups of screening holes (8) arranged in an array, and the screening holes (8) are horizontally opposite to the box opening of the screening box (9).

3. A drying and screening system for granular pet food according to claim 1, characterized in that: The brake toothed belt (11) comprises a transmission rack (111) meshing with the brake gear (10) for transmission, and a material limiting stopper belt (112) protruding upwardly from the belt surface of the screening mesh belt (7), and the brake toothed belt (11) is integrally connected to the screening mesh belt (7).

4. A drying and screening system for granular pet food according to claim 1, characterized in that: The screening roller grinding mechanism comprises a plurality of first material collecting box frames (17) and second material collecting box frames (19) which are arranged in a staggered manner in sequence inside a screening box (9); a first transmission shaft (24) which is opposite to the brake toothed belt (11) is rotatably connected to the middle of a chamber of the first material collecting box frame (17); a first turning roller (18) which supports the screening mesh belt (7) is sleeved on the outer side of the shaft of the first transmission shaft (24); a first grinding thread (25) is arranged at the bottom of the first material collecting box frame (17); a second transmission shaft (26) which is opposite to the brake toothed belt (11) is rotatably connected to the middle of a chamber of the second material collecting box frame (19); a second turning roller (20) which supports the screening mesh belt (7) is sleeved on the outer side of the shaft of the second transmission shaft (26); and a second grinding thread (27) is arranged at the bottom of the second material collecting box frame (19).

5. A drying and screening system for granular pet food according to claim 4, characterized in that: First transmission gears (21) are installed at both ends of the shaft of the first transmission shaft (24), and the first transmission gear (21) is connected to the brake toothed belt (11) through a first linkage gear (12) installed on the screening box (9); Second transmission gears (23) are mounted on both ends of the shaft of the second transmission shaft (26); one side of the second transmission gear (23) is meshingly connected to a transfer gear (22) mounted on the screening box (9); and the second transmission gear (23) is transmission-connected to a brake toothed belt (11) via a second linkage gear (13) mounted on the screening box (9).

6. A drying and screening system for granular pet food according to claim 4, characterized in that: The first turning roller (18) is a 90° roller structure, and the first turning roller (18) comprises a first turning roller (181) and a first material pushing thread (182) arranged on the first turning roller (181), the first material pushing thread (182) and the first grinding thread (25) meshing with each other, and the first material pushing thread (182) and the first grinding thread (25) are both spiral structures; The second turning roller (20) is a 90° roller shaft structure, and the second turning roller (20) comprises a second turning roller (201) and a second pushing thread (202) arranged on the second turning roller (201), the second pushing thread (202) and the second grinding thread (27) meshing with each other, and the second pushing thread (202) and the second grinding thread (27) are both spiral structures.

7. A drying and screening system for granular pet food according to claim 4, characterized in that: A plurality of groups of slag discharge pipe openings (2) are arranged on one side of the box body of the screening box (9) and are in communication with and opposite to the first material collecting box frame (17) and the second material collecting box frame (19).

8. A drying and screening system for granular pet food according to claim 1, characterized in that: A loading guide platform (15) is installed on one side of the screening box (9) and is horizontally opposite to the screening mesh belt (7), and a discharging guide platform (16) is installed on the other side of the screening box (9) and is horizontally opposite to the screening mesh belt (7).

9. A drying and screening system for granular pet food according to claim 1, characterized in that: The flap loading mechanism (5) comprises a flip bin (51) and a loading bin opening (52) which are integrally connected, a rotating shaft (53) being rotatably connected inside the bin body of the flip bin (51), and a plurality of groups of unloading flaps (55) are arranged along the circumference of the shaft of the rotating shaft (53).

10. A drying and screening system for granular pet food according to claim 1, characterized in that: A first pulley (41) is provided at one end of the output shaft of the brake motor (4), a second pulley (54) is provided at one end of the rotating shaft of the plate flipping feeding mechanism (5), a third pulley (61) is provided at one end of the shaft rod of the brake shaft (6), and the first pulley (41), the second pulley (54), and the third pulley (61) are connected in transmission via a brake belt (3).

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