Crushing and screening device for land restoration and use method thereof

Abstract

The present invention discloses a crushing and screening device for land restoration and a method of using the device, which mainly relates to the technical field of crushing and screening devices. The device comprises a first eccentric roller and a second eccentric roller, a first crushing chamber is formed between the first eccentric roller and the second eccentric roller, a third eccentric roller and a swing arm, a second crushing chamber is formed between the third eccentric roller and the swing arm, a fourth eccentric roller and an adjustment block, a third crushing chamber is formed between the adjustment block and the fourth eccentric roller, a first through hole is provided on the swing arm, a screen plate is provided on the shell, a second through hole is provided on the screen plate, a partition is slidably connected between the swing arm and the screen plate, and a third through hole and a fourth through hole are provided on the two partitions respectively, which are connected to the first through hole and the second through hole. The beneficial effects of the present invention are: solving the problem that the existing crushing device cannot perform continuous multi-stage crushing, improving the efficiency of soil block crushing and screening processing, and changing the particle size of the soil block after crushing.

Description

Technical Field

[0001] The invention relates to the technical field of crushing and screening devices, and in particular to a crushing and screening device for land restoration and a use method thereof. Background Art

[0002] Soil remediation is a technical measure to restore the normal function of contaminated soil. Crushing and screening work in land reclamation and restoration is an important task in the land restoration process. It aims to crush the original land and large stones for subsequent land use and construction.

[0003] During the use of current crushing and screening equipment for land restoration, soil clods are usually crushed once directly through crushing rollers. However, the crushing effect of a single crushing is very limited, which often leads to insufficient crushing of soil clods in the land. Multiple separate crushing and screening operations are required, reducing the soil processing efficiency of the entire equipment. In addition, it is impossible to crush stones of different particle sizes according to actual conditions. Summary of the invention

[0004] The purpose of the present invention is to provide a crushing and screening device for land restoration and a method of use, so as to solve the problem that the existing crushing device cannot perform continuous multi-stage crushing, improve the efficiency of soil block crushing and screening processing, and change the particle size of the crushed soil blocks.

[0005] In order to achieve the above-mentioned purpose, the invention is implemented through the following technical solutions:

[0006] A crushing and screening device for land restoration, comprising a shell, wherein a feed port and a first discharge port are respectively arranged at the top and the bottom of the shell, and a primary crushing mechanism, a secondary crushing mechanism and a tertiary crushing mechanism are arranged on the shell in order from top to bottom, wherein the primary crushing mechanism comprises a first eccentric roller and a second eccentric roller rotatably arranged at the top of the shell, and a first crushing chamber is formed between the first eccentric roller and the second eccentric roller;

[0007] The secondary crushing mechanism comprises a third eccentric roller rotatably arranged in the middle of the shell, and a swing arm rotatably arranged on the shell, and a second crushing chamber is formed between the third eccentric roller and the swing arm;

[0008] The three-stage crushing mechanism comprises a fourth eccentric roller rotatably arranged at the bottom of the shell, and an adjusting block threadably arranged on the shell, wherein a third crushing chamber is formed between the adjusting block and the fourth eccentric roller;

[0009] The swing arm is provided with a first through hole connecting the first crushing chamber and the third crushing chamber, the shell is provided with a screen plate, the screen plate is provided with a second through hole connecting the second crushing chamber and the third crushing chamber, and also includes a second discharge port;

[0010] The swing arm and the screen plate are slidably connected with a partition plate, and the two partition plates are respectively provided with a third through hole and a fourth through hole connected with the first through hole and the second through hole.

[0011] Furthermore, one end of the swing arm is provided with a rotating shaft rotatably connected to the shell, the other end of the swing arm is provided with a first connecting rod, the shell is provided with a first arc groove that is in sliding contact with the first connecting rod, the shell is connected with a slider in a transverse sliding manner, the end of the slider is provided with a first sliding groove that is in sliding contact with the first connecting rod, and also includes a first motor arranged on the shell, and the movable end of the first motor is provided with a swing rod rotatably connected to the slider.

[0012] Furthermore, connecting blocks are symmetrically provided at the ends of the slider, a push block is slidably connected between two of the connecting blocks, a plurality of symmetrical first limit grooves are provided on the connecting block, first limit blocks are symmetrically slidably connected on both sides of the push block, a plurality of protrusions are provided on one side of the first limit block, a first inclined surface in contact with the first limit groove is provided on one side of the protrusion, a first spring is provided between two adjacent first limit blocks, and a first column rotatably connected to the rocker arm is provided on the first limit block.

[0013] Furthermore, the push block is symmetrically slidably connected with a first wedge block, one side of the first wedge block is provided with a second inclined surface in contact with the first limit block, and also includes a second wedge block slidably arranged on the push block, and a screw rod threadedly connected to the push block, the second wedge block is provided with a third inclined surface in contact with the first wedge block, the end of the screw rod is provided with a T-block, the second wedge block is provided with a T-slot rotatably connected to the T-block, and both sides of the T-block are respectively in contact with the T-slot.

[0014] Furthermore, a second column is provided on one side of the partition, a support frame is provided on one side of the swing arm, and a second arc groove is provided on the shell, which is in sliding contact with a plurality of second columns and the support frame; a driven wheel is rotatably connected to the support frame, a groove is spirally provided on the driven wheel, and a protrusion is provided at the end of the second column, which is in sliding contact with the groove.

[0015] Furthermore, a connecting wheel is provided at the end of the driven wheel, a plurality of second limiting grooves are provided on the connecting wheel, a shifting groove is provided between two adjacent second limiting grooves, a second motor is provided on the support frame, a driving wheel is provided at the movable end of the second motor, second limiting blocks in contact with the second limiting grooves are provided on the upper and lower sides of the driving wheel, and shifting rods in contact with the shifting grooves are provided on the left and right sides of the driving wheel respectively.

[0016] Furthermore, the side surface of the fourth eccentric roller is conical, and a conical surface is provided on one side of the adjustment block, and the conical surface is parallel to the side surface of the fourth eccentric roller.

[0017] Furthermore, the side of the adjustment block is provided with a plurality of third columns, and also includes a third motor arranged on the shell, the movable end of the third motor is provided with a dial wheel, and the upper and lower sides of the dial wheel are respectively provided with fourth columns, the fourth columns are in contact with the third columns, and drive the adjustment block to rotate on the shell, and the left and right sides of the dial wheel are respectively provided with arc blocks, the arc blocks are in contact with a plurality of third columns at the same time, and limit the rotation of the adjustment block on the shell.

[0018] A method for using a crushing and screening device for land restoration comprises the following steps:

[0019] S1. When the stone is crushed normally, the stone first enters the shell through the feed port on the top of the shell, so that the stone enters the first crushing chamber, and the first eccentric roller and the second eccentric roller rotate relative to each other to hit the stone in the first crushing chamber, thereby achieving preliminary crushing of the stone;

[0020] S2, the initially crushed stones fall on the swing arm, and the swing arm tilts and swings, driving the smaller stones on the swing arm to shake, so that they gradually pass through the first through hole on the swing arm and directly fall into the third crushing chamber;

[0021] S3: Since the larger stones cannot pass through the first through hole smoothly, the inclined swing of the swing arm will continuously throw the stones in an oblique upward direction, driving the larger stones to gradually move downward. After entering the second crushing chamber, the third eccentric roller and the swing arm rotate to squeeze and collide with the larger stones in the second crushing chamber, thereby achieving secondary crushing of the larger stones and crushing them into smaller stones.

[0022] S4, the stones after secondary crushing fall on the screen plate, and after screening by the screen plate, the smaller stones enter the third crushing chamber through the second through hole, while the stones with larger outer diameter still flow out from the second discharge port, and are transported by the conveyor belt and re-enter the feed port to be crushed again;

[0023] S5, the smaller stones enter the third crushing chamber, and are crushed into stones that meet the requirements through the extrusion of the fourth eccentric roller and the adjusting block, thereby achieving continuous multi-stage crushing of the stones;

[0024] S6. When the outer diameter of the stone needs to be adjusted, the rotation angle of the swing arm is changed, the distance between the swing arm and the third eccentric roller is changed, and the size of the particle size after secondary crushing is changed. At the same time, the position of the partition is moved on the swing arm and the screen plate, so as to change the size of the holes formed by the first through hole and the second through hole, and the second through hole and the fourth through hole, thereby changing the particle size of the stone after screening by the swing arm and the screen plate; in addition, by rotating the adjusting block on the shell, since the adjusting block is threadedly connected to the shell, the adjusting block slides on the shell, changing the gap between the adjusting block and the fourth eccentric roller, thereby changing the particle size of the stone after tertiary crushing.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. When the stone is crushed normally, the stone first enters the shell from the feed port on the top of the shell, and is guided by the shell to enter the first crushing chamber. The first eccentric roller and the second eccentric roller rotate relative to each other, hitting the stone in the first crushing chamber to achieve preliminary crushing of the stone;

[0027] 2. After the initial crushing, the stones fall on the swing arm under the action of their own weight. The tilting and swinging of the swing arm drives the smaller stones on the swing arm to shake, so that they gradually pass through the first through hole on the swing arm and fall directly into the third crushing chamber. There is no need to follow the larger stones for secondary crushing, thereby simplifying the crushing steps of smaller stones and improving the efficiency of stone crushing and screening.

[0028] Since the larger stones cannot pass through the first through hole smoothly, the inclined swing of the swing arm will continuously throw the stones in an oblique upward direction, so as to prevent the stones from staying on the swing arm for a long time and blocking the first through hole provided on the swing arm, thereby affecting the efficiency of the smaller stones passing through the first through hole, thereby improving the efficiency of the stone crushing and screening process;

[0029] The larger stones gradually move downward and enter the second crushing chamber. The third eccentric roller and the swing arm rotate to squeeze and collide with the larger stones in the second crushing chamber, thereby realizing secondary crushing of the larger stones and crushing them into smaller stones. Then the stones that have undergone secondary crushing fall onto the screen plate. After being screened by the screen plate, the smaller stones enter the third crushing chamber through the second through hole, while the stones with larger outer diameters still flow out from the second discharge port, re-enter the feed port through the conveyor belt, and are crushed again, thereby improving the quality of the stones after crushing and screening. Finally, the smaller stones enter the third crushing chamber, and are squeezed by the fourth eccentric roller and the adjusting block to crush the smaller stones into stones that meet the requirements, thereby realizing continuous multi-stage crushing of the stones and further improving the quality of the stones after crushing and screening.

[0030] 3. When the outer diameter of the stone needs to be adjusted, the rotation angle of the swing arm is changed, the distance between the swing arm and the third eccentric roller is changed, and the size of the particle size after secondary crushing is changed. At the same time, the position of the partition plate is moved on the swing arm and the screen plate, so as to change the size of the holes formed by the first through hole and the second through hole, and the second through hole and the fourth through hole, thereby changing the particle size of the stone after screening by the swing arm and the screen plate, improving the screening effect of the swing arm and the screen plate, and facilitating the subsequent three-stage crushing device to perform crushing, thereby improving the quality of the stone after crushing and screening;

[0031] In addition, by rotating the adjusting block on the shell, since the adjusting block is threadedly connected to the shell, the adjusting block slides on the shell, changing the gap between the adjusting block and the fourth eccentric roller, and then changing the particle size of the stone after the three-stage crushing, thereby meeting the needs of different land restoration and improving the effect of land restoration;

[0032] 4. During normal crushing, the slider is driven to reciprocate on the shell through the cooperation among the first motor, the swing arm, the push block, the first guide column, the shell, the first limit block, and the first limit groove, without frequently changing the direction of the driving device, thereby improving the service life of the driving device; in the process of driving the slider to move back and forth, the slider, the first slide groove, the first connecting rod, and the first arc groove cooperate to drive the swing arm to rotate around the rotating shaft on the shell, thereby continuously throwing stones in the reverse direction in an oblique direction, thereby preventing the stones from staying on the swing arm for a long time and blocking the first through hole provided on the swing arm, thereby improving the efficiency of stone crushing and screening processing, and at the same time squeezing the large stones in the second crushing chamber to achieve secondary crushing of the large stones, thereby improving the quality of the stones after crushing and screening processing;

[0033] When the particle size of the soil block after crushing changes, the relative position of the slider and the push block is changed by loosening the cooperation between the screw rod, the first limit block, the push block, the slider, the first limit groove, the protrusion, the first inclined surface, and the first spring, so that the overall length of the slider and the push block changes. When the overall length of the slider and the push block is locked short, the highest point and the lowest point of the first connecting rod during the swinging process will move down at the same time; and when the overall length of the slider and the push block is extended, the highest point and the lowest point of the first connecting rod during the swinging process will move up at the same time, so that by adjusting the position of the slider and the push block, the gap between the highest point of the swing arm and the second eccentric roller is changed, thereby changing the size of the particle size after secondary crushing, facilitating the subsequent three-stage crushing device to perform crushing, and improving the quality of the stone after crushing and screening;

[0034] When the overall length of the slider and the push block is adjusted, the screw, the T-block, the T-slot, the second wedge block, the third inclined surface, the first wedge block, the second inclined surface, and the first limit block are tightened to cooperate with each other, and at the same time, a plurality of first limit blocks are restricted from moving on the push block, so as to improve the efficiency of adjusting the gap between the highest point of the swing arm and the second eccentric roller; at the same time, the first inclined surface provided on both sides of the protrusion is cooperated with the resistance generated after contacting with the first limit groove, so as to realize the relative fixation between the push block and the slider, ensure the stability of subsequent operation, avoid inadvertently changing the relative position between the push block and the slider, and affect the gap between the highest point of the swing arm and the second eccentric roller, so as to improve the quality of the stone after crushing and screening;

[0035] 5. When the particle size of the soil blocks after crushing changes, the second motor, the driving wheel, the second limit block, the second limit, the lever and the slot cooperate to drive the connecting wheel to rotate on the support frame, and drive the driven wheel to rotate on the support frame, so that the groove set by the bolt further contacts the convex block, and drives the second column to move relative to the support frame, thereby driving the partition plate to move on the swing arm and the screen plate respectively, changing the size of the holes formed by the first through hole and the second through hole, and the second through hole and the fourth through hole, thereby changing the particle size of the stones after screening by the swing arm and the screen plate, improving the screening effect of the swing arm and the screen plate, and facilitating the subsequent three-stage crushing device to perform crushing, thereby improving the quality of the stones after crushing and screening;

[0036] In addition, after the driving wheel drives the connecting wheel to rotate once each time, the second limiting block and the second limiting groove cooperate to limit the connecting wheel from rotating on the connecting frame, thereby preventing the external force from accidentally driving the driven wheel to rotate, driving the partition plate to move on the screen plate or the swing arm, affecting the size of the holes formed by the first through hole and the second through hole, and the second through hole and the fourth through hole, thereby improving the screening effect of the swing arm and the screen plate, and facilitating the subsequent three-stage crushing device to perform crushing, thereby improving the quality of the stones after crushing and screening;

[0037] 6. When the particle size of the soil blocks after crushing changes, the adjustment block is driven to rotate on the shell through the cooperation between the third motor, the dial wheel, the shell, the arc block, the third column and the fourth column. Since the adjustment block is threadedly connected to the shell, the adjustment block slides a short distance on the shell. After repeating the above steps many times, the distance between the conical surface provided on one side of the adjustment block and the conical surface of the fourth eccentric roller will be changed, thereby changing the particle size of the stones after the three-stage crushing, thereby meeting the needs of different land restorations and improving the effect of land restoration; in addition, each time the adjustment block is driven to move on the shell, the adjustment block is limited to rotate on the shell through the cooperation between the arc block and the third column, so as to avoid external force accidentally driving the adjustment block to rotate, changing the gap between the adjustment block and the fourth eccentric roller, and affecting the particle size of the stones after the subsequent three-stage crushing, thereby improving the effect of land restoration. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Attached Figure 1 It is a structural schematic diagram of the housing of the present invention.

[0039] Attached Figure 2 It is a schematic structural diagram of the cooperation between the first eccentric roller and the second eccentric roller of the present invention.

[0040] Attached Figure 3 It is a schematic diagram of the structure inside the shell of the present invention.

[0041] Attached Figure 4 It is a structural schematic diagram of the sieve plate of the present invention.

[0042] Attached Figure 5 It is a structural schematic diagram of the swing arm of the present invention.

[0043] Attached Figure 6 It is a structural schematic diagram of a slider of the present invention.

[0044] Attached Figure 7 It is a structural schematic diagram of the swing rod of the present invention.

[0045] Attached Figure 8 It is a structural schematic diagram of the first limiting block of the present invention.

[0046] Attached Fig. 9 It is a structural schematic diagram of the screw of the present invention.

[0047] Attached Fig.10 The present invention is attached Figure 5 A partial enlarged view of area A in the middle.

[0048] Attached Fig.11 It is a structural schematic diagram of the driven wheel of the present invention.

[0049] Attached Fig.12 It is a structural schematic diagram of the driving wheel of the present invention.

[0050] Attached Fig.13 It is a structural schematic diagram of the thumbwheel of the present invention.

[0051] Numbers shown in the accompanying drawings:

[0052] 1. Shell; 2. Feeding port; 3. First discharging port; 4. First eccentric roller; 5. Second eccentric roller; 6. First crushing chamber; 7. Third eccentric roller; 8. Swing arm; 9. Second crushing chamber; 10. Fourth eccentric roller; 11. Adjusting block; 12. Third crushing chamber; 13. First through hole; 14. Screen plate; 15. Second through hole; 16. Second discharging port; 17. Partition plate; 18. Third through hole; 19. Fourth through hole;

[0053] 20, rotating shaft; 21, first connecting rod; 22, first arc groove; 23, sliding block; 24, first sliding groove; 25, first motor; 26, swing rod; 27, connecting block; 28, pushing block; 29, first limiting groove; 30, first limiting block; 31, protrusion; 32, first inclined surface; 33, first spring; 34, first column; 35, first wedge block; 36, second inclined surface; 37, second wedge block; 38, screw; 39, third inclined surface; 40, T-block; 41, T-slot;

[0054] 42. second column; 43. support frame; 44. second arc groove; 45. driven wheel; 46. groove; 47. convex block; 48. connecting wheel; 49. second limiting groove; 50. shifting groove; 51. second motor; 52. driving wheel; 53. second limiting block; 54. shifting rod;

[0055] 55. The third column; 56. The third motor; 57. The dial; 58. The fourth column; 59. The arc block. DETAILED DESCRIPTION

[0056] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the application equally.

[0057] The present invention provides a crushing and screening device for land restoration, such as Figure 1-Figure 5 As shown, it comprises a shell 1, the top and bottom of the shell 1 are respectively provided with a feed port 2 and a first discharge port 3, and the shell 1 is provided with a primary crushing mechanism, a secondary crushing mechanism and a tertiary crushing mechanism in order from top to outside to bottom, the primary crushing mechanism comprises a first eccentric roller 4 and a second eccentric roller 5 rotatably arranged on the top of the shell 1, a first crushing chamber 6 is formed between the first eccentric roller 4 and the second eccentric roller 5, and the first eccentric roller 4 and the second eccentric roller 5 are relatively rotated to impact the stones in the first crushing chamber 6, so as to achieve preliminary crushing of the stones, and the stones after preliminary crushing are convenient for subsequent three-stage crushing devices to crush, thereby improving the quality of the stones after crushing and screening;

[0058] The secondary crushing mechanism comprises a third eccentric roller 7 rotatably arranged in the middle of the shell 1, and a swing arm 8 rotatably arranged on the shell 1, and a second crushing chamber 9 is formed between the third eccentric roller 7 and the swing arm 8. The rotation of the third eccentric roller 7 and the swing arm 8 squeezes and collides the larger stones in the second crushing chamber 9, thereby achieving secondary crushing of the larger stones, breaking them into smaller stones, which is convenient for the subsequent tertiary crushing device to crush, thereby improving the quality of the stones after crushing and screening;

[0059] The three-stage crushing mechanism includes a fourth eccentric roller 10 rotatably arranged at the bottom of the shell 1, and an adjusting block 11 threadedly arranged on the shell 1, and a third crushing chamber 12 is formed between the adjusting block 11 and the fourth eccentric roller 10. Through the extrusion of the fourth eccentric roller 10 and the adjusting block 11, smaller stones are crushed into stones that meet the requirements, thereby achieving continuous multi-stage crushing of stones, and further improving the quality of stones after crushing and screening.

[0060] The swing arm 8 is provided with a first through hole 13 connecting the first crushing chamber 6 and the third crushing chamber 12. The swing arm 8 is tilted and swung to drive the smaller stones on the swing arm 8 to shake, so that they gradually pass through the first through hole 13 on the swing arm 8 and directly fall into the third crushing chamber 12 without the need to follow the larger stones for secondary crushing, thereby simplifying the crushing steps of the smaller stones and improving the efficiency of the stone crushing and screening process;

[0061] The housing 1 is provided with a screen plate 14, and the screen plate 14 is provided with a second through hole 15 connecting the second crushing chamber 9 and the third crushing chamber 12, and also includes a second discharge port 16. The stones after secondary crushing fall on the screen plate 14, and after screening by the screen plate 14, the smaller stones enter the third crushing chamber 12 through the second through hole 15, while the stones with larger outer diameters still flow out from the second discharge port 16, and enter the feed port 2 again after being transported by the conveyor belt, and are crushed again, thereby improving the quality of the stones after crushing and screening;

[0062] The swing arm 8 and the screen plate 14 are slidably connected with a partition 17, and the two partitions 17 are respectively provided with a third through hole 18 and a fourth through hole 19 connected to the first through hole 13 and the second through hole 15. When the outer diameter of the stone needs to be adjusted, the swing arm 8 is changed by changing the rotation angle, the distance between the swing arm 8 and the third eccentric roller 7 is changed, and the size of the particle size after secondary crushing is changed. At the same time, the position of the partition 17 is moved on the swing arm 8 and the screen plate 14, so as to change the size of the hole formed by the first through hole 13 and the second through hole 15, and the second through hole 15 and the fourth through hole 19. Small, thereby changing the particle size of the stone after screening by the swing arm 8 and the screen plate 14, improving the screening effect of the swing arm 8 and the screen plate 14, and at the same time facilitating the subsequent three-stage crushing device to perform crushing, thereby improving the quality of the stone after crushing and screening; in addition, by rotating the adjusting block 11 on the shell 1, since the adjusting block 11 is threadedly connected to the shell 1, the adjusting block 11 slides on the shell 1, changing the gap between the adjusting block 11 and the fourth eccentric roller 10, thereby changing the particle size of the stone after the three-stage crushing, thereby meeting the needs of different land restoration and improving the effect after land restoration.

[0063] Preferably, Figure 5 , Figure 6 and Figure 7As shown, one end of the swing arm 8 is provided with a rotating shaft 20 rotatably connected to the housing 1, the other end of the swing arm 8 is provided with a first connecting rod 21, the housing 1 is provided with a first arc groove 22 that is in sliding contact with the first connecting rod 21, the housing 1 is slidably connected with a slider 23 in the transverse direction, the end of the slider 23 is provided with a first sliding groove 24 that is in sliding contact with the first connecting rod 21, and also includes a first motor 25 arranged on the housing 1, and the movable end of the first motor 25 is provided with a swing rod 26 rotatably connected to the slider 23; the swing rod 26 is driven to rotate by the first motor 25, and since the end of the swing rod 26 is rotatably connected to the slider 23, the slider 23 is driven to slide back and forth on the housing 1, and there is no need to frequently The steering direction of the driving device is changed frequently, and the service life of the driving device is improved; in the process of driving the slider 23 to move back and forth, the first sliding groove 24 provided on the slider 23 is in sliding contact with the first connecting rod 21, and the component force generated drives the first connecting rod 21 to slide in the first arc groove 22, driving the swing arm 8 to rotate around the rotating shaft 20 on the shell 1, and then continuously throwing stones in the reverse direction in an oblique direction, so as to prevent the stones from staying on the swing arm 8 for a long time and blocking the first through hole 13 provided on the swing arm 8, thereby improving the efficiency of stone crushing and screening processing, and at the same time squeezing the large stones in the second crushing chamber 9, realizing the secondary crushing of the large stones, thereby improving the quality of the stones after crushing and screening processing.

[0064] Preferably, Figure 7 , Figure 8 and Fig. 9As shown, a connecting block 27 is symmetrically provided at the end of the slider 23, a push block 28 is slidably connected between the two connecting blocks 27, a plurality of first limiting grooves 29 are symmetrically provided on the connecting block 27, and first limiting blocks 30 are symmetrically slidably connected on both sides of the push block 28, a plurality of protrusions 31 are provided on one side of the first limiting block 30, a first inclined surface 32 contacting the first limiting groove 29 is provided on one side of the protrusion 31, a first spring 33 is provided between two adjacent first limiting blocks 30, a first column 34 rotatably connected to the swing rod 26 is provided on the first limiting block 30, and a force is applied on the housing 1 to push the push block 28 relative to the slider 23, so that the first limiting block 30 moves relative to the first limiting groove 29, so that the first inclined surface 32 provided on one side of the protrusion 31 contacts the first limiting groove 29, and the effect generated after the contact The force drives the first limit block 30 to slide inward and compresses the first spring 33, so that the push block 28 moves relative to the slider 23 until the protrusion 31 moves into the next first limit groove 29. The above action is repeated many times to change the relative position of the slider 23 and the push block 28, so that the overall length of the slider 23 and the push block 28 changes. Since the overall length of the slider 23 and the push block 28 is locked short, the highest point and the lowest point of the first connecting rod 21 during the swinging process will move downward at the same time; and when the overall length of the slider 23 and the push block 28 is extended, the highest point and the lowest point of the first connecting rod 21 during the swinging process will move upward at the same time, so that by adjusting the position of the slider 23 and the push block 28, the gap between the highest point of the swing arm 8 and the second eccentric roller 5 is changed, thereby changing the size of the particle size after secondary crushing, facilitating the subsequent three-stage crushing device to crush and improve the quality of the stone after crushing and screening.

[0065] Preferably, Figure 7 , Figure 8 and Fig. 9As shown, the push block 28 is symmetrically slidably connected with a first wedge block 35, one side of the first wedge block 35 is provided with a second inclined surface 36 that contacts the first limit block 30, and also includes a second wedge block 37 slidably set on the push block 28, and a screw rod 38 threadedly connected to the push block 28, the second wedge block 37 is provided with a third inclined surface 39 that contacts the first wedge block 35, the end of the screw rod 38 is provided with a T-block 40, the second wedge block 37 is provided with a T-slot 41 rotatably connected to the T-block 40, and the two sides of the T-block 40 are respectively in contact with the T-slot 41, by tightening the screw rod 38, the contact between the T-block 40 and the T-slot 41 will drive the second wedge block 37 to slide on the push block 28, while preventing the second wedge block 37 from rotating with the second screw rod 38, and then The third inclined surface 39 provided at the end of the second wedge block 37 contacts the first wedge block 35, and the force generated after the contact simultaneously drives the two first wedge blocks 35 to move toward both sides until the second inclined surface 36 provided at the end of the first wedge block 35 contacts the first limit block 30, thereby simultaneously limiting the movement of several first limit blocks 30 on the push block 28, thereby improving the efficiency of adjusting the gap between the highest point of the swing arm 8 and the second eccentric roller 5; at the same time, the first inclined surfaces 32 provided on both sides of the protrusion 31 and the resistance generated after contacting the first limit groove 29 will realize the relative fixation between the push block 28 and the slider 23, ensure the stability of subsequent operation, avoid inadvertently changing the relative position between the push block 28 and the slider 23, and affect the gap between the highest point of the swing arm 8 and the second eccentric roller 5, thereby improving the quality of the stone after crushing and screening.

[0066] Preferably, Figure 5 , Fig.10 and Fig.11 As shown, a second column 42 is provided on one side of the partition 17, a support frame 43 is provided on one side of the swing arm 8, and a second arc groove 44 is provided on the shell 1, which is in sliding contact with a plurality of second columns 42 and the support frame 43; a driven wheel 45 is rotatably connected to the support frame 43, and a groove 46 is spirally provided on the driven wheel 45, and a protrusion 47 which is in sliding contact with the groove 46 is provided at the end of the second column 42.

[0067] Preferably, Fig.11 and Fig.12As shown, a connecting wheel 48 is provided at the end of the driven wheel 45, and a plurality of second limiting grooves 49 are provided on the connecting wheel 48, and a shifting groove 50 is provided between two adjacent second limiting grooves 49. A second motor 51 is provided on the support frame 43 to provide power for the rotation of the driven wheel 45, and a driving wheel 52 is provided at the movable end of the second motor 51. Second limiting blocks 53 in contact with the second limiting grooves 49 are provided on the upper and lower sides of the driving wheel 52. The resistance generated by the contact between the second limiting grooves 49 and the second limiting blocks 53 limits the rotation of the connecting wheel 48 on the connecting frame, thereby preventing the external force from accidentally driving the driven wheel 45 to rotate, driving the partition plate 17 to move on the screen plate 14 or the swing arm 8, affecting the size of the holes formed by the first through hole 13 and the second through hole 15, and the second through hole 15 and the fourth through hole 19, thereby improving the screening effect of the swing arm 8 and the screen plate 14, and at the same time The subsequent three-stage crushing device is used for crushing, thereby improving the quality of the stones after crushing and screening; the left and right sides of the driving wheel 52 are respectively provided with a lever 54 in contact with the lever groove 50. The driving connecting wheel 48 is rotated on the support frame 43 through the force generated by the contact between the lever 54 and the lever groove 50, and the driven wheel 45 is driven to rotate on the bracket, so that the groove 46 set by the bolt further contacts the protrusion 47, and drives the second column 42 to move relative to the support frame 43, thereby driving the partition 17 to move on the swing arm 8 and the screen plate 14 respectively, changing the size of the holes formed by the first through hole 13 and the second through hole 15, and the second through hole 15 and the fourth through hole 19, thereby changing the particle size of the stones after screening by the swing arm 8 and the screen plate 14, improving the screening effect of the swing arm 8 and the screen plate 14, and at the same time facilitating the subsequent three-stage crushing device to perform crushing, thereby improving the quality of the stones after crushing and screening.

[0068] Preferably, Figure 3 and Fig.13 As shown, the side surface of the fourth eccentric roller 10 is conical, and a conical surface is provided on one side of the adjusting block 11, and the conical surface is parallel to the side surface of the fourth eccentric roller 10. When the adjusting block 11 is rotated on the shell 1, the adjusting block 11 is driven to move on the shell 1, thereby changing the distance between the conical surface provided on one side of the adjusting block 11 and the conical surface of the fourth eccentric roller 10, thereby changing the particle size of the stone after the three-stage crushing, thereby meeting the needs of different land restoration and improving the effect of land restoration.

[0069] Preferably, Figure 3 and Fig.13As shown, the side of the adjusting block 11 is provided with a plurality of third columns 55, and also includes a third motor 56 arranged on the shell 1 to provide power for driving the adjusting block 11 to rotate on the shell 1. The movable end of the third motor 56 is provided with a dial wheel 57, and the upper and lower sides of the dial wheel 57 are respectively provided with fourth columns 58. The fourth columns 58 are in contact with the third columns 55 and drive the adjusting block 11 to rotate on the shell 1. Since the adjusting block 11 is threadedly connected to the shell 1, the adjusting block 11 slides on the shell 1, changing the adjusting block 11 and the fourth eccentric roller. 10, thereby changing the particle size of the stone after the three-stage crushing, so as to meet the needs of different land restoration and improve the effect of land restoration; arc blocks 59 are respectively provided on the left and right sides of the dial wheel 57, and the arc blocks 59 are in contact with a plurality of third columns 55 at the same time, and limit the adjustment block 11 to rotate on the shell 1, so as to avoid the external force accidentally driving the adjustment block 11 to rotate, change the gap between the adjustment block 11 and the fourth eccentric roller 10, and affect the particle size of the stone after the subsequent three-stage crushing, so as to improve the effect of land restoration.

[0070] The present invention provides a method for using a crushing and screening device for land restoration, such as Figure 1-Figure 5 As shown, the following steps are included:

[0071] S1. When the stone is crushed normally, the stone first enters the shell 1 from the feed port 2 provided on the top of the shell 1, and is guided by the shell 1 to enter the first crushing chamber 6. The first eccentric roller 4 and the second eccentric roller 5 rotate relative to each other, and hit the stone in the first crushing chamber 6, so as to achieve preliminary crushing of the stone;

[0072] S2. The initially crushed stones fall onto the swing arm 8 under the action of their own weight. The swing arm 8 tilts and swings, driving the smaller stones on the swing arm 8 to shake, so that they gradually pass through the first through hole 13 on the swing arm 8 and directly fall into the third crushing chamber 12. There is no need to follow the larger stones for secondary crushing, thereby simplifying the crushing steps of the smaller stones and improving the efficiency of the stone crushing and screening process.

[0073] S3. Since the larger stones cannot pass through the first through hole 13 smoothly, the inclined swing of the swing arm 8 will continuously throw the stones in an oblique upward direction to prevent the stones from staying on the swing arm 8 for a long time and blocking the first through hole 13 provided on the swing arm 8, thereby affecting the efficiency of the smaller stones passing through the first through hole 13, thereby improving the efficiency of the stone crushing and screening processing; thereby driving the larger stones to gradually move downward, and after entering the second crushing chamber 9, the larger stones in the second crushing chamber 9 are squeezed and collided by the rotation of the third eccentric roller 7 and the swing arm 8, so as to achieve secondary crushing of the larger stones and crush them into smaller stones;

[0074] S4, the stones after secondary crushing fall onto the screen plate 14, and after screening by the screen plate 14, the smaller stones enter the third crushing chamber 12 through the second through hole 15, while the stones with larger outer diameter still flow out from the second discharge port 16, and enter the feed port 2 again after being transported by the conveyor belt, and are crushed again, thereby improving the quality of the stones after crushing and screening;

[0075] S5. Finally, the smaller stones enter the third crushing chamber 12, and are crushed into stones that meet the requirements through the extrusion of the fourth eccentric roller 10 and the adjusting block 11, thereby achieving continuous multi-stage crushing of the stones, and further improving the quality of the stones after crushing and screening.

[0076] S6. When the outer diameter of the stone needs to be adjusted, the rotation angle of the swing arm 8 is changed, the distance between the swing arm 8 and the third eccentric roller 7 is changed, and the size of the particle size after secondary crushing is changed. At the same time, the position of the partition 17 is moved on the swing arm 8 and the screen plate 14, so as to change the size of the holes formed by the first through hole 13 and the second through hole 15, and the second through hole 15 and the fourth through hole 19, thereby changing the particle size of the stone after screening by the swing arm 8 and the screen plate 14, improving the screening effect of the swing arm 8 and the screen plate 14, and facilitating the subsequent three-stage crushing device to perform crushing, thereby improving the quality of the stone after crushing and screening; in addition, by rotating the adjustment block 11 on the shell 1, since the adjustment block 11 is threadedly connected to the shell 1, the adjustment block 11 slides on the shell 1, changing the gap between the adjustment block 11 and the fourth eccentric roller 10, thereby changing the particle size of the stone after three-stage crushing, thereby meeting the needs of different land restoration and improving the effect after land restoration.

[0077] Example 1

[0078] The present invention provides a crushing and screening device for land restoration and a method of using the same. Figure 1-Figure 5 As shown, when the stone is normally crushed, the stone first enters the shell 1 through the feed port 2 provided on the top of the shell 1, and is guided by the shell 1 to enter the first crushing chamber 6. The first eccentric roller 4 and the second eccentric roller 5 rotate relative to each other to hit the stone in the first crushing chamber 6, thereby achieving preliminary crushing of the stone.

[0079] After the initial crushing, the stones fall on the swing arm 8 under the action of their own weight. The swing arm 8 tilts and swings, driving the smaller stones on the swing arm 8 to shake, so that they gradually pass through the first through hole 13 on the swing arm 8 and directly fall into the third crushing chamber 12, without the need to follow the larger stones for secondary crushing, thereby simplifying the crushing steps of the smaller stones and improving the efficiency of the stone crushing and screening process;

[0080] Since the larger stones cannot pass through the first through hole 13 smoothly, the inclined swing of the swing arm 8 will continuously throw the stones in an oblique upward direction, so as to prevent the stones from staying on the swing arm 8 for a long time and blocking the first through hole 13 provided on the swing arm 8, thereby affecting the efficiency of the smaller stones passing through the first through hole 13, thereby improving the efficiency of the stone crushing and screening process;

[0081] The larger stones gradually move downward and enter the second crushing chamber 9. The third eccentric roller 7 and the swing arm 8 rotate to squeeze and collide with the larger stones in the second crushing chamber 9, thereby realizing secondary crushing of the larger stones and crushing them into smaller stones. Then, the stones that have undergone secondary crushing fall onto the screen plate 14. After being screened by the screen plate 14, the smaller stones enter the third crushing chamber 12 through the second through hole 15, while the stones with larger outer diameters still flow out from the second discharge port 16, and re-enter the feed port 2 through the conveyor belt to be crushed again, thereby improving the quality of the stones after crushing and screening. Finally, the smaller stones enter the third crushing chamber 12, and are squeezed by the fourth eccentric roller 10 and the adjusting block 11 to crush the smaller stones into stones that meet the requirements, thereby realizing continuous multi-stage crushing of the stones and further improving the quality of the stones after crushing and screening.

[0082] When the outer diameter of the stone needs to be adjusted, the rotation angle of the swing arm 8 is changed, the distance between the swing arm 8 and the third eccentric roller 7 is changed, and the size of the particle size after secondary crushing is changed. At the same time, the position of the partition 17 is moved on the swing arm 8 and the screen plate 14, so as to change the size of the holes formed by the first through hole 13 and the second through hole 15, and the second through hole 15 and the fourth through hole 19, thereby changing the particle size of the stone after screening by the swing arm 8 and the screen plate 14, improving the screening effect of the swing arm 8 and the screen plate 14, and facilitating the subsequent three-stage crushing device to perform crushing, thereby improving the quality of the stone after crushing and screening;

[0083] In addition, by rotating the adjusting block 11 on the shell 1, since the adjusting block 11 is threadedly connected to the shell 1, the adjusting block 11 slides on the shell 1, thereby changing the gap between the adjusting block 11 and the fourth eccentric roller 10, and then changing the particle size of the stone after the third stage crushing, thereby meeting different land restoration needs and improving the effect of land restoration.

[0084] Example 2

[0085] On the basis of Example 1, Figure 5-Figure 9As shown, during normal crushing, the first motor 25 drives the swing rod 26 to rotate. Since the end of the swing rod 26 is rotatably connected to the first guide column on the push block 28, the push block 28 is driven to slide back and forth on the housing 1. At the same time, the first limit block 30 is in contact with the first limit groove 29, and the force generated drives the slider 23 to reciprocate on the housing 1. There is no need to frequently change the direction of the driving device, thereby improving the service life of the driving device; in the process of driving the slider 23 to move back and forth, the first sliding groove 24 provided on the slider 23 is in sliding contact with the first connecting rod 21, and the component force generated drives the first connecting rod 21 to slide in the first arc groove 22, driving the swing arm 8 to rotate around the rotating shaft 20 on the housing 1, and then continuously throwing stones in the oblique reverse direction, preventing the stones from staying on the swing arm 8 for a long time and blocking the first through hole 13 provided on the swing arm 8, thereby improving the efficiency of stone crushing and screening processing, and at the same time squeezing the large stones in the second crushing chamber 9, realizing secondary crushing of the large stones, thereby improving the quality of the stones after crushing and screening processing;

[0086] When the particle size of the soil block changes after being crushed, the screw rod 38 is loosened to release the restriction relationship of the first limit block 30 sliding on the push block 28, and a force is applied on the shell 1 to push the push block 28 relative to the slider 23, so that the first limit block 30 moves relative to the first limit groove 29, so that the first inclined surface 32 provided on one side of the protrusion 31 contacts the first limit groove 29, and the force generated after the contact drives the first limit block 30 to slide inward and compress the first spring 33, so that the push block 28 moves relative to the slider 23 until the protrusion 31 moves into the next first limit groove 29, and the above actions are repeated multiple times to change the slider 23. The relative position of the slider 23 and the push block 28 changes the overall length of the slider 23 and the push block 28. When the overall length of the slider 23 and the push block 28 is shortened, the highest point and the lowest point of the first connecting rod 21 during the swinging process will move downward at the same time; and when the overall length of the slider 23 and the push block 28 is extended, the highest point and the lowest point of the first connecting rod 21 during the swinging process will move upward at the same time, so that by adjusting the position of the slider 23 and the push block 28, the gap between the highest point of the swing arm 8 and the second eccentric roller 5 is changed, thereby changing the size of the particle size after secondary crushing, facilitating the subsequent three-stage crushing device to crush, and improving the quality of the stone after crushing and screening;

[0087] When the overall length of the slider 23 and the push block 28 is adjusted, the second wedge block 37 is driven to slide on the push block 28 through the contact between the T-block 40 and the T-slot 41 by tightening the screw rod 38, while preventing the second wedge block 37 from rotating with the second screw rod 38. Then, the third inclined surface 39 provided at the end of the second wedge block 37 contacts the first wedge block 35, and the force generated after the contact simultaneously drives the two first wedge blocks 35 to move toward both sides until the second inclined surface 36 provided at the end of the first wedge block 35 contacts the first limit block 30. The first limit blocks 30 are in contact with the push block 28, thereby limiting the movement of several first limit blocks 30 on the push block 28 at the same time, improving the efficiency of adjusting the gap between the highest point of the swing arm 8 and the second eccentric roller 5; at the same time, the first inclined surfaces 32 provided on both sides of the protrusion 31 are in contact with the first limit groove 29 to generate resistance, which will realize the relative fixation between the push block 28 and the slider 23, ensure the stability of subsequent operation, avoid inadvertently changing the relative position between the push block 28 and the slider 23, and affect the gap between the highest point of the swing arm 8 and the second eccentric roller 5, thereby improving the quality of stones after crushing and screening.

[0088] Example 3

[0089] On the basis of Example 1, Figure 5 , Fig.10 , Fig.11 and Fig.12 As shown, when the particle size of the soil blocks after crushing changes, the second motor 51 drives the driving wheel 52 to rotate, so that the second limit block 53 provided on the driving wheel 52 slides out of the second limit groove 49, and the restriction of the connection wheel 48 on the support frame 43 is released. Then, the driving connecting wheel 48 is driven to rotate on the support frame 43 through the force generated by the contact between the lever 54 and the slot 50, and the driven wheel 45 is driven to rotate on the bracket, so that the groove 46 provided with the bolt further contacts with the protrusion 47, and drives the second column 42 to move relative to the support frame 43, thereby driving the partition plate 17 to move on the swing arm 8 and the screen plate 14 respectively, changing the size of the holes formed by the first through hole 13 and the second through hole 15, and the second through hole 15 and the fourth through hole 19, thereby changing the particle size of the stones after screening by the swing arm 8 and the screen plate 14, improving the screening effect of the swing arm 8 and the screen plate 14, and facilitating the subsequent three-stage crushing device to perform crushing, thereby improving the quality of the stones after crushing and screening;

[0090] In addition, each time the driving wheel 52 drives the connecting wheel 48 to rotate once, another second limit block 53 will slide into the second limit groove 49, and the resistance generated by the contact between the second limit groove 49 and the second limit block 53 will limit the rotation of the connecting wheel 48 on the connecting frame, thereby preventing the external force from accidentally driving the driven wheel 45 to rotate, driving the partition 17 to move on the screen plate 14 or the swing arm 8, affecting the size of the holes formed by the first through hole 13 and the second through hole 15, and the second through hole 15 and the fourth through hole 19, thereby improving the screening effect of the swing arm 8 and the screen plate 14, and at the same time facilitating the subsequent three-stage crushing device to perform crushing, thereby improving the quality of the stones after crushing and screening.

[0091] Example 4

[0092] On the basis of Example 1, Figure 3 and Fig.13 As shown, when the particle size of the soil block changes after being crushed, the third motor 56 drives the dial wheel 57 to rotate on the housing 1, so that the arc block 59 provided on the dial wheel 57 slides out from between the plurality of third columns 55, and the restriction on the rotation of the adjustment block 11 on the housing 1 is released. Then the fourth column 58 provided on the dial wheel 57 contacts the third column 55, and the force generated after the contact drives the adjustment block 11 to rotate on the housing 1. Since the adjustment block 11 is threadedly connected to the housing 1, the adjustment block 11 slides a short distance on the housing 1. After repeating the above steps several times, the conical surface provided on one side of the adjustment block 11 is changed to contact the conical surface of the fourth eccentric roller 10. The spacing between the surfaces can change the particle size of the stones after the three-stage crushing, so as to meet the needs of different land restoration and improve the effect of land restoration. In addition, each time the adjusting block 11 is driven to move on the shell 1, another arc block 59 will slide between the third columns 55. The resistance generated by the contact between the arc block 59 and the third columns 55 will limit the rotation of the adjusting block 11 on the shell 1, so as to avoid the external force accidentally driving the adjusting block 11 to rotate, change the gap between the adjusting block 11 and the fourth eccentric roller 10, and affect the particle size of the stones after the subsequent three-stage crushing, so as to improve the effect of land restoration.

Claims

1. A crushing and screening device for land restoration, comprising a housing (1), wherein the top and bottom of the housing (1) are respectively provided with a feed inlet (2) and a first discharge outlet (3), characterized in that: The shell (1) is provided with a primary crushing mechanism, a secondary crushing mechanism and a tertiary crushing mechanism in order from top to bottom, the primary crushing mechanism comprising a first eccentric roller (4) and a second eccentric roller (5) rotatably arranged on the top of the shell (1), and a first crushing chamber (6) is formed between the first eccentric roller (4) and the second eccentric roller (5); The secondary crushing mechanism comprises a third eccentric roller (7) rotatably arranged in the middle of the shell (1), and a swing arm (8) rotatably arranged on the shell (1), and a second crushing chamber (9) is formed between the third eccentric roller (7) and the swing arm (8); The three-stage crushing mechanism comprises a fourth eccentric roller (10) rotatably arranged at the bottom of the shell (1), and an adjustment block (11) threadably arranged on the shell (1), wherein a third crushing chamber (12) is formed between the adjustment block (11) and the fourth eccentric roller (10); The swing arm (8) is provided with a first through hole (13) communicating with the first crushing chamber (6) and the third crushing chamber (12); the housing (1) is provided with a screen plate (14); the screen plate (14) is provided with a second through hole (15) communicating with the second crushing chamber (9) and the third crushing chamber (12); and the housing (1) further includes a second discharge port (16); The swing arm (8) and the screen plate (14) are slidably connected with a partition plate (17), and the two partition plates (17) are respectively provided with a third through hole (18) and a fourth through hole (19) which are connected to the first through hole (13) and the second through hole (15); One end of the swing arm (8) is provided with a rotating shaft (20) rotatably connected to the housing (1), the other end of the swing arm (8) is provided with a first connecting rod (21), the housing (1) is provided with a first arc groove (22) in sliding contact with the first connecting rod (21), the housing (1) is slidably connected with a slider (23) in the transverse direction, the end of the slider (23) is provided with a first sliding groove (24) in sliding contact with the first connecting rod (21), and further comprises a first motor (25) arranged on the housing (1), the movable end of the first motor (25) is provided with a swing rod (26) rotatably connected to the slider (23); A connecting block (27) is symmetrically provided at the end of the slider (23); a push block (28) is slidably connected between two of the connecting blocks (27); a plurality of symmetrical first limiting grooves (29) are provided on the connecting block (27); first limiting blocks (30) are symmetrically slidably connected on both sides of the push block (28); a plurality of protrusions (31) are provided on one side of the first limiting block (30); a first inclined surface (32) in contact with the first limiting groove (29) is provided on one side of the protrusion (31); a first spring (33) is provided between two adjacent first limiting blocks (30); and a first column (34) rotatably connected to the swing rod (26) is provided on the first limiting block (30); The push block (28) is symmetrically slidably connected to a first wedge block (35), one side of the first wedge block (35) is provided with a second inclined surface (36) in contact with the first limit block (30), and further comprises a second wedge block (37) slidably arranged on the push block (28), and a screw rod (38) threadedly connected to the push block (28), the second wedge block (37) is provided with a third inclined surface (39) in contact with the first wedge block (35), an end of the screw rod (38) is provided with a T-shaped block (40), the second wedge block (37) is provided with a T-shaped slot (41) rotatably connected to the T-shaped block (40), and both sides of the T-shaped block (40) are in contact with the T-shaped slot (41) respectively; A second column (42) is provided on one side of the partition (17), a support frame (43) is provided on one side of the swing arm (8), and a second arc groove (44) is provided on the housing (1) and is in sliding contact with a plurality of second columns (42) and the support frame (43); a driven wheel (45) is rotatably connected to the support frame (43), a groove (46) is spirally provided on the driven wheel (45), and a protrusion (47) is provided at the end of the second column (42) and is in sliding contact with the groove (46); A connecting wheel (48) is provided at the end of the driven wheel (45), a plurality of second limiting grooves (49) are provided on the connecting wheel (48), a shifting groove (50) is provided between two adjacent second limiting grooves (49), a second motor (51) is provided on the support frame (43), a driving wheel (52) is provided at the movable end of the second motor (51), second limiting blocks (53) contacting the second limiting grooves (49) are provided on the upper and lower sides of the driving wheel (52), and shifting rods (54) contacting the shifting grooves (50) are provided on the left and right sides of the driving wheel (52); The regulating block (11) is provided with a plurality of third columns (55) on the side thereof, and further comprises a third motor (56) arranged on the housing (1); a dial wheel (57) is provided at the movable end of the third motor (56); fourth columns (58) are provided on the upper and lower sides of the dial wheel (57); the fourth columns (58) are in contact with the third columns (55) and drive the regulating block (11) to rotate on the housing (1); arc blocks (59) are provided on the left and right sides of the dial wheel (57); the arc blocks (59) are in contact with the plurality of third columns (55) at the same time and restrict the regulating block (11) from rotating on the housing (1).

2. A crushing and screening device for land restoration according to claim 1, characterized in that: The side surface of the fourth eccentric roller (10) is conical, and one side of the adjustment block (11) is provided with a conical surface, wherein the conical surface is parallel to the side surface of the fourth eccentric roller (10).

3. The method for using the crushing and screening device for land restoration according to claim 1 is characterized in that: The following steps are involved: S1. When the stone is crushed normally, the stone first enters the housing (1) through the feed port (2) provided at the top of the housing (1), so that the stone enters the first crushing chamber (6), and then the first eccentric roller (4) and the second eccentric roller (5) rotate relative to each other, so as to impact the stone in the first crushing chamber (6), thereby achieving preliminary crushing of the stone; S2, the initially crushed stones fall onto the swing arm (8), and the swing arm (8) tilts and swings, causing the smaller stones on the swing arm (8) to shake, so that they gradually pass through the first through hole (13) on the swing arm (8) and directly fall into the third crushing chamber (12); S3, since the larger stones cannot pass through the first through hole (13) smoothly, the swing arm (8) will continuously throw the stones in an oblique upward direction through the tilting swing, driving the larger stones to gradually move downward, and after entering the second crushing chamber (9), the third eccentric roller (7) and the swing arm (8) rotate to squeeze and collide with the larger stones in the second crushing chamber (9), thereby achieving secondary crushing of the larger stones and crushing them into smaller stones; S4, the stones that have undergone secondary crushing fall onto the screen plate (14), and after being screened by the screen plate (14), the smaller stones enter the third crushing chamber (12) through the second through hole (15), while the stones with larger outer diameters still flow out from the second discharge port (16), are transported by the conveyor belt, and re-enter the feed port (2) to be crushed again; S5, the smaller stones enter the third crushing chamber (12), and are crushed into stones that meet the requirements through the squeezing of the fourth eccentric roller (10) and the adjusting block (11), thereby achieving continuous multi-stage crushing of the stones; S6. When the outer diameter of the stone needs to be adjusted, the rotation angle of the swing arm (8) is changed to change the distance between the swing arm (8) and the third eccentric roller (7), thereby changing the size of the particle size after secondary crushing. At the same time, the position of the partition plate (17) is moved on the swing arm (8) and the screen plate (14), thereby changing the size of the holes formed by the first through hole (13) and the second through hole (15), and the second through hole (15) and the fourth through hole (19), thereby changing the particle size of the stone after screening by the swing arm (8) and the screen plate (14); in addition, by rotating the adjustment block (11) on the housing (1), since the adjustment block (11) is threadedly connected to the housing (1), the adjustment block (11) slides on the housing (1), thereby changing the gap between the adjustment block (11) and the fourth eccentric roller (10), thereby changing the particle size of the stone after the third crushing.

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