CN220478938U - Classification screening device for harmless treatment of garbage - Google Patents

Abstract

The invention relates to the technical field of garbage treatment, and discloses a classification and screening device for harmless treatment of garbage, which includes a box with a feed port provided on the top and a transmission mechanism provided on the right side of the box. , the rear part of the box is provided with a separation mechanism, the left side of the box is provided with a discharge port, and the inner walls of the box are respectively provided with a No. 1 roller, a No. 2 roller, a smoothing roller, and a No. 1 crushing roller. and the No. 2 crushing roller. The surface of the No. 1 roller is drivingly connected to the surface of the No. 2 roller through a conveyor belt. Two fans are provided on the right wall inside the box, and a sieve plate is provided on the inner wall of the box. The invention can automatically classify garbage through the transmission mechanism, thereby reducing the labor intensity of workers and increasing work efficiency. Through the transmission mechanism and separation mechanism, multiple types of garbage can be classified simultaneously, eliminating the need for multiple processes for classification. Reduce cost input.

Description

A sorting and screening device for harmless treatment of garbage

Technical field

The invention relates to the technical field of garbage treatment, specifically a sorting and screening device for harmless treatment of garbage.

Background technique

Garbage is solid waste generated in human daily life and production. Due to its large discharge volume, complex and diverse components, and its pollution, resource and social nature, it needs to be harmless, resource-based, reduced and socialized. If it is not handled properly, it will pollute the environment, affect environmental sanitation, waste resources, destroy the safety of production and life, and destroy social harmony. Garbage disposal is to quickly remove the garbage and treat it harmlessly.

At present, most garbage treatment plants still rely on workers to manually classify garbage, resulting in low work efficiency and high labor input. Some existing classification equipment can only perform a single classification. When further classification is required, it needs to be moved to Classification in the next process is very troublesome and has high investment costs. Therefore, a classification and screening device for harmless treatment of garbage is proposed to solve the above-mentioned problems.

Contents of the invention

(1) Technical problems solved

In view of the shortcomings of the existing technology, the present invention provides a classification and screening device for harmless treatment of garbage, which solves the problems of low manual classification efficiency, single machine classification and the need for multiple classifications.

(2) Technical solutions

In order to achieve the above object, the present invention provides the following technical solution: a sorting and screening device for harmless treatment of garbage, including a box body, a feed port is provided on the top of the box body, and a transmission is provided on the right side of the box body. mechanism, the rear part of the box is provided with a separation mechanism, the left side of the box is provided with a discharge port, and the inner wall of the box is provided with a No. 1 roller, a No. 2 roller, a smoothing roller, and a No. 1 crusher. and the No. 2 crushing roller, and the No. 1 crushing roller and the No. 2 crushing roller are located above the No. 1 roller and the No. 2 roller. The smoothing roller is located between the No. 2 roller and the No. 1 crushing roller. The No. 1 roller The surface is connected to the surface of the No. 2 roller through a conveyor belt. The right wall inside the box is provided with two fans. The inner wall of the box is provided with a sieve plate, and the sieve plate is located above the No. 2 crushing roller;

The transmission mechanism includes a No. 1 pulley. The surface of the No. 1 pulley is drivingly connected to the surface of the double-layer pulley through a belt. The surface of the double-layer pulley is drivingly connected to the surface of the No. 1 small pulley through the belt. The No. 2 pulley is provided at the axis center of the small pulley. The surface of the No. 2 pulley is connected to the surface of the No. 3 pulley through a belt. The No. 2 small pulley is provided at the axis center of the No. 3 pulley. The No. 2 pulley The surface of the small pulley is connected to the surface of the No. 4 pulley through a belt. A selection device is provided on the left side of the box, and a motor is provided on the right side of the box.

Preferably, the selection device includes a No. 1 gear, a No. 2 gear is provided on the surface of the No. 1 gear, a No. 1 sprocket is disposed at the axis of the No. 2 gear, and the surface of the No. 1 sprocket passes through a chain. It is drivingly connected to the surface of the No. 2 sprocket. A turntable is provided at the axis of the No. 2 sprocket, and a transmission rod is provided on the left side of the turntable.

Preferably, the axes of the No. 1 gear and the No. 2 gear are welded and fixed to the axes of the No. 1 grinding roller and the No. 2 grinding roller respectively through connecting rods, and the surface of the No. 2 gear is connected to the surface of the No. 1 gear. mesh with each other, the axis center of the No. 1 sprocket is welded and fixed to the axis center of the No. 2 gear, the axis center of the turntable is welded and fixed to the axis center of the No. 2 sprocket, and the inner wall of the transmission rod passes through The connecting rod is rotationally connected to the left side of the turntable, the axis center of the second sprocket is rotationally connected to the left side of the box through the connecting rod, and the inner wall of the transmission rod is rotationally connected to the left side of the screen plate through the connecting rod.

Preferably, the separation mechanism includes a mounting plate, the inner wall of the mounting plate is provided with a clip, a moving block is provided at the rear of the clip, and an electromagnet is provided at the bottom of the moving block. The mounting plate There is an electric push rod at the rear.

Preferably, the surface of the clamping strip is slidingly connected to the inner wall of the mounting plate, the front part of the moving block and the rear part of the clamping strip are welded and fixed, the top of the electromagnet is fixedly installed on the bottom of the moving block, and the electric The surface of the push rod is connected to the rear part of the installation plate through bolts, the front part of the installation plate is connected to the rear part of the box through bolts, the front part of the moving block is slidingly connected to the rear part of the installation plate, and the electric The output end of the push rod is fixedly connected to the right side of the moving block.

Preferably, the left end of the motor is connected to the right side of the box through bolts, the axis center of the No. 2 small pulley is welded and fixed to the axis center of the No. 1 small pulley, and the axis center of the No. 2 small pulley is connected to the axis center of the No. 2 small pulley. The axis center of the No. 3 pulley is welded and fixed.

Preferably, the feed inlet is located at the top of the box, the outlet is located on the left side of the box, and the No. 1 roller, No. 2 roller, smoothing roller, No. 1 crushing roller and No. 2 crushing roller Both ends of the roller are rotatably connected to the inner wall of the box, the axis of the fan is rotatably connected to the right wall inside the box, and the surface of the sieve plate is slidingly connected to the inner wall of the box.

Preferably, the output end of the motor is welded and fixed to the axis of the No. 1 roller, the axis of the No. 1 pulley is welded and fixed to the axis of the No. 2 roller through a connecting rod, and the axis of the double-layer pulley is welded and fixed. The center of the smoothing roller is welded and fixed by a connecting rod and the axis of the smoothing roller. The axes of the No. 2 pulley and the No. 3 pulley are both welded and fixed by a connecting rod and the axes of the two fans. The No. 4 pulley is welded and fixed. The axis center is welded and fixed to the axis center of the No. 2 crushing roller through a connecting rod.

(3) Beneficial effects

Compared with the existing technology, the present invention provides a classification and screening device for harmless treatment of garbage, which has the following beneficial effects:

1. This sorting and screening device for harmless treatment of garbage can automatically classify garbage through the transmission mechanism, thereby reducing the labor intensity of workers and significantly improving work efficiency.

2. This sorting and screening device for harmless treatment of garbage can classify multiple types of garbage at the same time through the transmission mechanism and separation mechanism, thereby eliminating the need for multiple processes for classification and reducing cost investment.

3. This sorting and screening device for harmless treatment of garbage can crush the screened garbage through the No. 1 roller and the No. 2 roller, so that the fan can blow out the broken plastic and the electromagnet can absorb the broken metal, which can increase the efficiency of classification. .

4. This sorting and screening device for harmless treatment of garbage can use smoothing rollers to smooth the garbage falling on the conveyor belt, thereby preventing the garbage from being piled together, which will cause the subsequent absorption of metal to be impossible, resulting in the applicability of the device. Range is limited.

5. This sorting and screening device for harmless treatment of garbage can simultaneously drive garbage screening, garbage crushing, garbage blowing, garbage bulldozing, garbage transmission, and absorption of metals in the garbage through one motor, thereby reducing the need for motors The number of placements can thereby reduce cost investment, reduce space occupation, achieve synchronous operation between various institutions, and improve work efficiency.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of a sorting and screening device for harmless treatment of garbage proposed by the present invention;

Figure 2 is a cross-sectional view of the overall structure of a sorting and screening device for harmless treatment of garbage proposed by the present invention;

Figure 3 is a schematic diagram of the transmission mechanism of a sorting and screening device for harmless treatment of garbage proposed by the present invention;

Figure 4 is a partial schematic diagram of the transmission mechanism of a sorting and screening device for harmless treatment of garbage proposed by the present invention;

Figure 5 is a schematic diagram of a sorting and screening device for garbage harmless treatment proposed by the present invention;

Figure 6 is a rear view of the sorting and screening device for garbage harmless treatment proposed by the present invention;

Figure 7 is a schematic diagram of the separation mechanism of a sorting and screening device for harmless treatment of garbage proposed by the present invention.

In the picture: 1. Box; 2. Inlet; 3. Transmission mechanism; 31. Pulley No. 1; 32. Double-layer pulley; 33. Small pulley No. 1; 34. Pulley No. 2; 35. Pulley No. 3; 36. Small pulley No. 2; 37. Pulley No. 4; 38. Selecting device; 381. Gear No. 1; 382. Gear No. 2; 383. Sprocket No. 1; 384. Sprocket No. 2; 385. Turntable; 386. Transmission rod; 39. Motor; 4. Separation mechanism; 41. Installation plate; 42. Clamp; 43. Moving block; 44. Electric push rod; 45. Electromagnet; 5. Discharge port; 6. No. 1 roller; 7. No. 2 roller; 8. Smoothing roller; 9. Fan; 10. No. 1 crushing roller; 11. No. 2 crushing roller; 12. Sieve plate.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some 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 those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Example 1

A sorting and screening device for harmless treatment of garbage, as shown in Figures 1 to 7, includes a box 1, a feed port 2 is provided on the top of the box 1, and a transmission mechanism 3 is provided on the right side of the box 1. The rear part of the box 1 is provided with a separation mechanism 4, and the left side of the box 1 is provided with a discharge port 5. The inner wall of the box 1 is provided with a No. 1 roller 6, a No. 2 roller 7, a smoothing roller 8, and a No. 1 crusher. Roller 10 and No. 2 crushing roller 11, and No. 1 crushing roller 10 and No. 2 crushing roller 11 are located above the No. 1 roller 6 and No. 2 roller 7, and the smoothing roller 8 is located between the No. 2 roller 7 and the No. 1 crushing roller 10. During this period, the surface of the No. 1 drum 6 is connected to the surface of the No. 2 drum 7 through a conveyor belt. Two fans 9 are provided on the right wall inside the box 1. A sieve plate 12 is provided on the inner wall of the box 1, and the sieve plate 12 is located at Above the No. 2 crushing roller 11;

The transmission mechanism 3 includes a No. 1 pulley 31. The surface of the No. 1 pulley 31 is drivingly connected to the surface of the double-layer pulley 32 through a belt. The surface of the double-layer pulley 32 is drivingly connected to the surface of the No. 1 small pulley 33 through the belt. The No. 1 small pulley The No. 2 pulley 34 is provided at the axis center of the No. 3 pulley 34. The surface of the No. 2 pulley 34 is connected to the surface of the No. 3 pulley 35 through a belt. The No. 2 small pulley 36 is provided at the axis center of the No. 3 pulley 35. The No. 2 small pulley 36 is provided at the axis center of the No. 3 pulley 35. The surface of 36 is drivingly connected to the surface of No. 4 pulley 37 through a belt. A selection device 38 is provided on the left side of the box 1, and a motor 39 is provided on the right side of the box 1.

In this embodiment, the selection device 38 includes a No. 1 gear 381. A No. 2 gear 382 is provided on the surface of the No. 1 gear 381. A No. 1 sprocket 383 is disposed at the axis of the No. 2 gear 382. The surface of the No. 1 sprocket 383 passes through The chain is connected to the surface of the No. 2 sprocket 384. A turntable 385 is provided at the axis of the No. 2 sprocket 384. A transmission rod 386 is provided on the left side of the turntable 385. The sieve plate 12 can be driven to reciprocate through the selection device 38. Then the garbage can be preliminarily sorted and screened, and the size of the holes on the sieve plate 12 can be freely adjusted according to actual needs, which is very convenient and practical.

Further, the axes of the No. 1 gear 381 and the No. 2 gear 382 are welded and fixed to the axes of the No. 1 grinding roller 10 and the No. 2 grinding roller 11 respectively through connecting rods, and the surface of the No. 2 gear 382 is connected to the No. 1 gear. 381 mesh with each other, the axis of the first sprocket 383 and the axis of the second gear 382 are welded and fixed, the axis of the turntable 385 and the axis of the second sprocket 384 are welded and fixed, and the transmission rod 386 The inner wall is rotationally connected to the left side of the turntable 385 through a connecting rod. The axis of the second sprocket 384 is rotationally connected to the left side of the box 1 through a connecting rod. The inner wall of the transmission rod 386 is connected to the left side of the screen plate 12 through a connecting rod. The rotation connection, through the meshing of the No. 1 gear 381 and the No. 2 gear 382, can drive the No. 1 crushing roller 10 and the No. 2 crushing roller 11 to rotate in opposite directions, so that the garbage can be crushed between them, so that large pieces of garbage can be crushed. The garbage is turned into small pieces of garbage, which is convenient for subsequent processes and can increase work efficiency in disguise.

Furthermore, the separation mechanism 4 includes a mounting plate 41. The inner wall of the mounting plate 41 is provided with a clip 42. The rear of the clip 42 is provided with a moving block 43. The bottom of the moving block 43 is provided with an electromagnet 45. The mounting plate An electric push rod 44 is provided at the rear of 41, and the clip 42 can guide and support the movement of the moving block 43 to prevent its movement direction from deviating under the push of the electric push rod 44 and to prevent the electromagnet 45 from absorbing Too much metal leads to excessive weight, causing the moving block 43 to fall, which in turn causes the device to be unable to continue working and increases maintenance costs.

In addition, the surface of the clamping bar 42 is slidingly connected to the inner wall of the mounting plate 41 , the front part of the moving block 43 and the rear part of the clamping bar 42 are welded and fixed, the top of the electromagnet 45 is fixedly installed on the bottom of the moving block 43 , and the electric push rod 44 The surface of the moving block 43 is connected to the rear of the mounting plate 41 through bolts, the front of the mounting plate 41 is connected to the rear of the box 1 through bolts, the front of the moving block 43 is slidingly connected to the rear of the mounting plate 41, and the electric push rod 44 The output end of the moving block 43 is fixedly connected to the right side of the moving block 43. The electric push rod 44 can be used to classify a batch of garbage, push the moving block 43 out, and recycle the metal absorbed by the electromagnet 45 under the moving block 43. The retraction of the electric push rod 44 drives the electromagnet 45 to reset, so that it can continue to absorb metal.

In addition, the left end of the motor 39 is connected to the right side of the box 1 through bolts. The axis of the No. 2 pulley 34 is welded and fixed to the axis of the No. 1 small pulley 33. The axis of the No. 2 small pulley 36 is welded and fixed. Welded and fixed to the axis of the No. 3 pulley 35, a motor 39 can simultaneously drive the screening of garbage, the crushing of garbage, the blowing out of garbage, the bulldozing of garbage, the transmission of garbage, and the absorption of metal in the garbage, thereby reducing the need for motors. 39 placement quantity, thereby reducing cost investment, reducing space occupation, achieving synchronous operation between various institutions, and improving work efficiency.

Example 2

As shown in Figures 1 to 6, the feed port 2 is opened on the top of the box 1, the discharge port 5 is opened on the left side of the box 1, the first roller 6, the second roller 7, the smoothing roller 8, the first Both ends of the No. 10 and No. 2 crushing rollers 11 are rotatably connected to the inner wall of the box 1. The axis of the fan 9 is rotatably connected to the right wall inside the box 1. The surface of the sieve plate 12 is connected to the inner wall of the box 1. The inner wall is slidingly connected, and connecting rods are welded to both sides of the screen plate 12, and the connecting rods are placed in the chute provided on the inner wall of the box 1. This allows the screen plate 12 to move reciprocally while maintaining an inclined state, thereby preventing the screen plate from being 12 itself rotates or cannot maintain its tilted state when moving, causing the screened garbage to be unable to move to the No. 1 crushing roller 10 and the No. 2 crushing roller 11, causing the device to be unable to continue working and the practicality is greatly reduced.

It is worth noting that the output end of the motor 39 is welded and fixed to the axis center of the No. 1 roller 6, the axis center of the No. 1 pulley 31 is welded and fixed to the axis center of the No. 2 roller 7 through a connecting rod, and the double-layer pulley 32 is welded and fixed. The axis center is welded and fixed to the axis center of the smoothing roller 8 through a connecting rod. The axis centers of the No. 2 pulley 34 and the No. 3 pulley 35 are both welded and fixed to the axle centers of the two fans 9 through a connecting rod. The No. 4 pulley The axis of No. 37 is welded and fixed with the axis of No. 2 crushing roller 11 through a connecting rod. The reason why this device uses belt drive is that the belt has good elasticity and can alleviate impact and vibration during work, and the movement is smooth and noiseless. When the load is too large, the belt slips on the wheel, thus preventing other parts from being damaged and serving as a safety protection. The belt is an intermediate part, and its length can be selected as needed within a certain range to adapt to working conditions with larger center distance requirements. , and the structure is simple, easy to manufacture, easy to install and maintain, and low cost, so belt drive is selected.

When the classification and screening device for harmless treatment of garbage of the present invention is used, the garbage is put into the feed port 2. At this time, the garbage will fall on the screen plate 12. The motor 39 drives the No. 1 drum 6 to rotate. The roller 6 drives the No. 2 roller 7 to rotate, the No. 2 roller 7 drives the No. 1 pulley 31 to rotate, the No. 1 pulley 31 drives the double-layer pulley 32 to rotate, the double-layer pulley 32 drives the No. 1 small pulley 33 to rotate, and the No. 1 small pulley 33 drives the No. 1 small pulley 33 to rotate. The No. 2 pulley 34 rotates, the No. 2 pulley 34 drives the No. 3 pulley 35 to rotate, the No. 3 pulley 35 drives the No. 2 small pulley 36 to rotate, the No. 2 small pulley 36 drives the No. 4 pulley 37 to rotate, and the No. 4 pulley 37 drives the No. 2 crushing roller 11 Rotation, the No. 2 crushing roller 11 drives the No. 2 gear 382, the No. 2 gear 382 drives the No. 1 sprocket 383 to rotate, the No. 1 sprocket 383 drives the No. 2 sprocket 384 to rotate, and the No. 2 sprocket 384 drives the turntable 385 to rotate. The turntable 385 drives the sieve plate 12 to reciprocate through the transmission rod 386, so that the sieve plate 12 can be vibrated to screen the garbage, so that smaller garbage such as small plastics, paper scraps, etc. The garbage will move through the inclined screen plate 12 to between the No. 2 crushing roller 11 and the No. 1 crushing roller 10. At this time, the No. 2 gear 382 drives the No. 1 gear 381 to rotate, and the No. 1 gear 381 drives the No. 1 crushing roller 10 to rotate. The No. 1 crushing roller 10 and the No. 2 crushing roller 11 will rotate in opposite directions to squeeze and crush the garbage. The crushed garbage and the previously screened garbage will fall onto the conveyor belt, and during the falling process, the No. 2 pulleys 34 and the No. 3 pulleys will The pulley 35 will drive the two fans 9 to rotate to blow out the screened garbage and the crushed garbage respectively, so that the lighter garbage, such as broken plastics, paper scraps, etc., will be blown out from the outlet 5. The garbage dropped on the conveyor belt will be driven by the rotation of the No. 1 roller 6 and the No. 2 roller 7 to move it. While moving, the double-layer pulley 32 will drive the smoothing roller 8 to rotate, so that the accumulated garbage can be removed. Bulldozing is carried out to prevent the garbage from being piled together, which will lead to the subsequent inability to absorb metal, resulting in a limited scope of application of the device. The bulldozed garbage continues to move, and the electromagnet 45 is energized. At this time, the metal in the garbage will be After being attracted to the electromagnet 45, the remaining garbage will be moved out along the conveyor belt. When the garbage is processed, the electric push rod 44 will move through the moving block 43. The moving block 43 drives the electromagnet 45 to move, so that the electromagnet 45 moves out of the conveyor belt. When the electromagnet 45 is powered off, the metal on the electromagnet 45 can fall and be collected. By automatically classifying and screening garbage, the labor intensity of workers can be reduced, and the work efficiency is significantly improved, without the need for multiple processes. Classification processing can reduce cost investment.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations are mutually exclusive. any such actual relationship or sequence exists between them. Furthermore, the terms "comprises," "comprises," or any other variations thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article, or apparatus that includes the stated element.

Claims (8)

1. A sorting and screening device for harmless treatment of garbage, including a box (1), characterized in that: a feed port (2) is provided on the top of the box (1), and the box (1) A transmission mechanism (3) is provided on the right side of the box, a separation mechanism (4) is provided on the rear of the box (1), and a discharge port (5) is provided on the left side of the box (1). The inner wall of the box (1) is respectively provided with the No. 1 roller (6), the No. 2 roller (7), the smoothing roller (8), the No. 1 crushing roller (10) and the No. 2 crushing roller (11), and the No. 1 crushing roller The roller (10) and the No. 2 crushing roller (11) are located above the No. 1 roller (6) and the No. 2 roller (7), and the smoothing roller (8) is located between the No. 2 roller (7) and the No. 1 crushing roller ( 10), the surface of the No. 1 drum (6) is drivingly connected to the surface of the No. 2 drum (7) through a conveyor belt, and two fans (9) are provided on the right wall inside the box (1), so The inner wall of the box (1) is provided with a sieve plate (12), and the sieve plate (12) is located above the No. 2 crushing roller (11); The transmission mechanism (3) includes a No. 1 pulley (31). The surface of the No. 1 pulley (31) is drivingly connected to the surface of the double-layer pulley (32) through a belt. The surface of the double-layer pulley (32) is connected through a belt. The belt is drivingly connected to the surface of the No. 1 small pulley (33). A No. 2 pulley (34) is provided at the axis of the No. 1 small pulley (33). The surface of the No. 2 pulley (34) is connected to the No. 3 pulley through the belt. The surface of the No. 3 pulley (35) is drivingly connected. The No. 2 small pulley (36) is provided at the axis of the No. 3 pulley (35). The surface of the No. 2 small pulley (36) is connected to the No. 4 pulley (36) through a belt. 37), a picking device (38) is provided on the left side of the box (1), and a motor (39) is provided on the right side of the box (1). 2. A sorting and screening device for harmless treatment of garbage according to claim 1, characterized in that: the selection device (38) includes a No. 1 gear (381), and the surface of the No. 1 gear (381) A No. 2 gear (382) is provided, and a No. 1 sprocket (383) is provided at the axis of the No. 2 gear (382). The surface of the No. 1 sprocket (383) communicates with the No. 2 sprocket (384) through a chain. ), a turntable (385) is provided at the axis of the second sprocket (384), and a transmission rod (386) is provided on the left side of the turntable (385). 3. A sorting and screening device for harmless treatment of garbage according to claim 2, characterized in that: the axes of the No. 1 gear (381) and the No. 2 gear (382) are connected to a connecting rod through a connecting rod respectively. The axes of the No. 2 grinding roller (10) and the No. 2 grinding roller (11) are welded and fixed. The surface of the No. 2 gear (382) meshes with the surface of the No. 1 gear (381). The No. 1 sprocket ( The axis center of 383) is welded and fixed to the axis center of No. 2 gear (382), the axis center of the turntable (385) is welded and fixed to the axis center of the No. 2 sprocket (384), and the transmission rod (385) is welded and fixed to the axis center of the No. 2 sprocket (384). The inner wall of 386) is rotationally connected to the left side of the turntable (385) through a connecting rod, and the axis of the second sprocket (384) is rotationally connected to the left side of the box (1) through a connecting rod. The transmission rod The inner wall of (386) is rotationally connected to the left side of the screen plate (12) through a connecting rod. 4. A sorting and screening device for harmless treatment of garbage according to claim 1, characterized in that: the separation mechanism (4) includes a mounting plate (41), and the inner wall of the mounting plate (41) is provided with There is a clamping strip (42), a moving block (43) is provided at the rear of the clamping strip (42), an electromagnet (45) is provided at the bottom of the moving block (43), and the mounting plate (41) An electric push rod (44) is provided at the rear. 5. A sorting and screening device for harmless treatment of garbage according to claim 4, characterized in that: the surface of the clamping strip (42) is slidingly connected to the inner wall of the mounting plate (41), and the moving block ( The front part of 43) is welded and fixed to the rear part of the clamp bar (42), the top of the electromagnet (45) is fixedly installed on the bottom of the moving block (43), and the surface of the electric push rod (44) is connected by bolts At the rear of the mounting plate (41), the front of the mounting plate (41) is connected to the rear of the box (1) through bolts, and the front of the moving block (43) is connected to the mounting plate (41). The rear part is slidingly connected, and the output end of the electric push rod (44) is fixedly connected with the right side of the moving block (43). 6. A sorting and screening device for harmless treatment of garbage according to claim 1, characterized in that: the left end of the motor (39) is connected to the right side of the box (1) through bolts, and the No. 2 The axis of the pulley (34) is welded and fixed to the axis of the No. 1 small pulley (33), and the axis of the No. 2 small pulley (36) is welded and fixed to the axis of the No. 3 pulley (35). 7. A sorting and screening device for harmless treatment of garbage according to claim 1, characterized in that: the feed port (2) is opened at the top of the box (1), and the discharge port (5 ) is located on the left side of the box (1), and the No. 1 roller (6), No. 2 roller (7), smoothing roller (8), No. 1 crushing roller (10) and No. 2 crushing roller (11) Both ends of the fan (9) are rotatably connected to the inner wall of the box (1), the axis of the fan (9) is rotatably connected to the right wall inside the box (1), and the surface of the sieve plate (12) is connected to the inner wall of the box (1). The inner wall of (1) is slidingly connected. 8. A sorting and screening device for harmless treatment of garbage according to claim 1, characterized in that: the output end of the motor (39) is welded and fixed to the axis of the No. 1 drum (6), and the The axis center of the No. 1 pulley (31) is welded and fixed to the axis center of the No. 2 roller (7) through a connecting rod. The axis center of the double-layer pulley (32) is connected by a connecting rod and the smoothing roller (8). The axes of the No. 2 pulley (34) and the No. 3 pulley (35) are welded and fixed to the axes of the two fans (9) through connecting rods, and the No. 4 pulley (37) is welded and fixed. ) is welded and fixed to the axis of the No. 2 crushing roller (11) through a connecting rod.