Crushing device for building solid waste resource reutilization

Abstract

The invention relates to the technical field of solid waste recovery, and provides a crushing device for building solid waste resource reutilization, which comprises a frame body, the top of the frame body is fixedly connected with a box body, the bottom end of the box body is fixedly connected with a discharging hopper, the top end of the box body is fixedly connected with a feeding hopper, and the inner side of the box body is provided with a crushing mechanism. The crushing mechanism comprises a feeding pipe rotationally connected to the inner side of the box body, the feeding pipe communicates with the outlet end of the feeding hopper, the outlet end of the feeding pipe is fixedly connected with a centrifugal barrel, a plurality of discharging openings are formed in the outer side of the centrifugal barrel, and crushing assemblies are arranged on the inner side of the centrifugal barrel and distributed around the centrifugal barrel at equal angles. A protective shell is fixedly connected to one end of the inner side of the box body, and a transmission part used for driving the feeding pipe to rotate is arranged on the inner side of the protective shell. Solid waste accumulation at the bottom of the centrifugal barrel can be relieved, solid waste accumulated at the bottom of the centrifugal barrel can be subjected to reinforced crushing, and therefore the crushing effect is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of solid waste recycling, and specifically, to a crushing device for the resource recycling of construction solid waste. Background Art

[0002] The recycling of construction waste refers to the process of collecting, classifying, treating, and recycling the waste generated at construction sites. This helps to reduce the negative impact of construction waste on the environment and promote the sustainable use of resources. The recycling of construction waste can be carried out in different ways. In the process of recycling construction waste, the general treatment method is to first conduct preliminary crushing on the construction waste to facilitate the subsequent recovery of metals in the construction waste. After the metal recovery is completed, the stones in the construction waste are crushed again by a crushing device until the particle size reaches the size that can be utilized. Since the surface of the crushed stones will adhere to concrete after being used once, if the stones are crushed to the particle size of the previously used crushed stones, the edges and corners on the surface of the recycled crushed stones will be lost, and thus the interlocking effect between the crushed stones will be reduced during repeated use, resulting in a decrease in the strength and stability of the structure.

[0003] In this regard, the "device for recycling and reusing construction waste" disclosed in the existing Chinese patent (publication number: CN117160594B) includes a frame; a housing is installed on the frame; a crushing roller is installed inside the housing; a driving component for driving the crushing roller to rotate is installed on one side of the housing; a discharge port is arranged at the lower part of the housing; a feed port is arranged on one side of the housing; a controller is fixedly installed on the frame; a screening roller is installed inside the housing; the screening roller is coaxial with the crushing roller; the screening roller is driven to rotate by a power component, and the rotation direction is opposite to that of the crushing roller; claws for crushing are arranged on the crushing roller; crushing claws are arranged inside the screening roller; an opening is arranged on one side of the screening roller; the feed port extends to the opening.

[0004] However, in the process of implementing the related technology, there are some technical defects in this patent: First, this patent imports solid waste into the screening roller through a feed hopper for crushing and screening. However, the solid waste easily accumulates concentratedly at the bottom of the centrifugal cylinder after entering the centrifugal cylinder, and it cannot be evenly dispersed even under the action of centrifugal force. Moreover, the power of the screening roller is realized by belt drive, and this method has low transmission efficiency, further resulting in insufficient centrifugal force of the screening roller, which exacerbates the accumulation of solid waste at the bottom of the screening roller, thus causing the solid waste to be unable to be effectively crushed, and at the same time, it will also cause the crushing claws to be stuck and damaged; Second, this patent introduces solid waste into the screening roller through a feed hopper to increase its weight and cause it to sink. The hydraulic cylinder is controlled to move by detecting the pressure with a pressure sensor to lower the brake frame and prevent feeding. However, during actual implementation, the pressure sensor may have a reaction delay, resulting in overfeeding and jamming inside the screening roller. Moreover, when a large amount of material is fed instantaneously, the pressure sensor cannot respond in time, which will also cause the problem of jamming inside the screening roller. In view of this, the present invention proposes a crushing device for the resource recycling of construction solid waste. Summary of the Invention

[0005] The present invention proposes a crushing device for the resource recycling of construction solid waste, which solves the problem that solid waste accumulates and cannot be effectively crushed in the prior art.

[0006] The technical solution of the present invention is as follows: A crushing device for the resource recycling of construction solid waste includes a frame body. The top of the frame body is fixedly connected with a box body. The bottom end of the box body is fixedly connected with a discharge hopper. The top end of the box body is fixedly connected with a feed hopper. A crushing mechanism is arranged inside the box body. The crushing mechanism includes a feed pipe rotatably connected inside the box body. The feed pipe is connected to the outlet end of the feed hopper. The outlet end of the feed pipe is fixedly connected with a centrifugal cylinder. A plurality of uniformly distributed discharge ports are arranged on the outer side of the centrifugal cylinder. A plurality of crushing components are arranged inside the centrifugal cylinder to crush the solid waste by cooperating with the rotation of the centrifugal cylinder. The plurality of crushing components are distributed at equal angles around the centrifugal cylinder. One end inside the box body is fixedly connected with a protective shell. A transmission member for driving the feed pipe to rotate is arranged inside the protective shell.

[0007] Preferably, the crushing component includes two guiding blocks symmetrically distributed along the center line of the centrifugal cylinder. Both guiding blocks are fixedly connected to the outer side of the centrifugal cylinder. A sliding rod penetrating the side wall of the centrifugal cylinder is slidably connected to the center position of both guiding blocks. One end of both sliding rods is fixedly connected with the same mounting plate. The mounting plate is located inside the centrifugal cylinder. A plurality of uniformly distributed crushing claws are fixedly connected to the inside of the mounting plate. An arc-shaped convex plate is fixedly connected to the top end inside the box body. A pressing member for driving the sliding rod to slide by abutting against the arc-shaped convex plate is arranged at the other end of the sliding rod.

[0008] Preferably, the mounting plate is an arc-shaped plate, and the outer wall of the mounting plate is attached to the inner wall of the centrifugal cylinder in the initial state.

[0009] Preferably, the pressing member includes a convex block fixedly connected to the end of the corresponding sliding rod. A return spring is sleeved on the sliding rod. One end of the return spring is welded to the convex block, and the other end of the return spring is welded to the corresponding guiding block.

[0010] Preferably, the transmission member includes a rotating shaft penetrating through the side wall of the box body. The rotating shaft is rotatably connected to the side wall of the box body. One end of the rotating shaft is fixedly connected with a first gear, and the first gear is located inside the protective shell. The middle part of the feed pipe is fixedly connected with a second gear, and the second gear meshes with the first gear. A driving member for driving the rotating shaft to rotate is arranged outside the box body.

[0011] Preferably, the driving member includes a mounting frame fixedly connected to the outside of the box body. A motor is fixedly installed inside the mounting frame. The output shaft of the motor is fixedly connected with a third gear. One end of the rotating shaft away from the first gear is fixedly connected with a fourth gear, and the fourth gear meshes with the third gear.

[0012] Preferably, the tooth number ratio of the second gear to the first gear is 1:40, and the tooth number ratio of the third gear to the fourth gear is 1:20.

[0013] Preferably, a material blocking mechanism is arranged at the bottom of the feed hopper. The material blocking mechanism includes a baffle plate penetrating through the bottom wall of the feed hopper. The baffle plate is slidably connected to the bottom wall of the feed hopper. The bottom of the baffle plate is fixedly connected with a push-pull rod. The top end of the mounting frame is fixedly connected with a guide plate. The push-pull rod penetrates through the guide plate and is slidably connected to the guide plate. A linkage member for driving the push-pull rod to slide up and down reciprocally by cooperating with the rotation of the fourth gear is arranged at the bottom end of the push-pull rod.

[0014] Preferably, a guide groove slidably matched with the baffle plate is formed inside the feed hopper.

[0015] Preferably, the linkage member includes an eccentric wheel coaxially and fixedly connected with the fourth gear. A connecting rod is rotatably connected to the outer edge of the eccentric wheel. One end of the connecting rod away from the eccentric wheel is rotatably connected to the bottom end of the push-pull rod.

[0016] The working principle and beneficial effects of the present invention are as follows: 1. Solid waste is introduced through the feed hopper, and then continuously introduced into the centrifugal cylinder through the feed pipe. Then, the transmission member is used to drive the feed pipe to rotate, so that the centrifugal cylinder rotates. This causes all the sliding rods to rotate circumferentially synchronously, making the crushing claws inside each mounting plate contact the solid waste and crush it. The design of the return spring makes the contact between the crushing claws and the solid waste elastic contact, which can avoid the problem of the crushing claws being stuck due to the accumulation of solid waste. 2. During the rotation of the centrifugal cylinder, when the slide bar moves to the highest point, the convex block at the end of the slide bar contacts the curved convex plate, causing the convex block to move toward each other under compression, which causes the slide bar to move downward, and the reset spring is compressed to accumulate potential energy, so that the mounting plate drives the crushing claws to move toward each other and apply vertical impact force to the accumulated solid waste to break it. When the convex block is separated from the curved convex plate, the reset spring releases the potential energy to restore the slide bar to its initial position. This cycle continues. When the crushing claws follow the circumferential movement of the centrifugal cylinder, they can not only apply circumferential crushing force to the solid waste, but also apply vertical impact force to the solid waste at the highest position caused by the movement to break it. In this way, the solid waste accumulated at the bottom of the centrifugal cylinder can be crushed more effectively, thereby greatly improving the crushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 The structure of a crushing device for recycling construction solid waste according to the present invention is shown in FIG. Figure 1 ; Figure 2 The structure of a crushing device for recycling construction solid waste according to the present invention is shown in FIG. Figure 2 ; Figure 3 It is a structural schematic diagram of the crushing mechanism of the present invention; Figure 4 It is a schematic structural diagram of the crushing component of the present invention; Figure 5 It is a structural schematic diagram of the top pressure piece of the present invention; Figure 6 It is a structural schematic diagram of the transmission member of the present invention; Figure 7 It is a structural schematic diagram of the driving mechanism of the present invention; Figure 8 It is a structural schematic diagram of the material blocking mechanism of the present invention.

[0019] In the figure: 1. frame; 2. box body; 3. discharge hopper; 4. feed hopper; 5. crushing mechanism; 51. feed pipe; 52. centrifugal cylinder; 53. discharge port; 54. crushing assembly; 541. guide block; 542. slide bar; 543. mounting plate; 544. crushing claw; 545. top pressure piece; 5451. convex block; 5452. return spring; 55. cambered convex plate; 56. protective shell; 57. transmission member; 571. rotating shaft; 572. first gear; 573. second gear; 6. driving mechanism; 61. mounting frame; 62. motor; 63. third gear; 64. fourth gear; 7. material blocking mechanism; 71. guide plate; 72. push-pull rod; 73. material blocking plate; 74. eccentric wheel; 75. connecting rod. DETAILED DESCRIPTION

[0020] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0021] As Figures 1 to 8 shown, this embodiment proposes a crushing device for the resource recycling of construction waste, including a frame body 1. A box body 2 is fixedly connected to the top of the frame body 1. A discharge hopper 3 is fixedly connected to the bottom end of the box body 2. A feed hopper 4 is fixedly connected to the top end of the box body 2. A crushing mechanism 5 is arranged inside the box body 2. The crushing mechanism 5 includes a feed pipe 51 rotatably connected inside the box body 2. The feed pipe 51 is connected to the outlet end of the feed hopper 4. A centrifugal cylinder 52 is fixedly connected to the outlet end of the feed pipe 51. A plurality of uniformly distributed discharge ports 53 are formed on the outer side of the centrifugal cylinder 52. A plurality of crushing components 54 are arranged inside the centrifugal cylinder 52 to crush the solid waste by cooperating with the rotation of the centrifugal cylinder 52. The plurality of crushing components 54 are distributed at equal angles around the centrifugal cylinder 52. One end inside the box body 2 is fixedly connected with a protective shell 56. A transmission member 57 for driving the feed pipe 51 to rotate is arranged inside the protective shell 56. The crushing component 54 includes two guiding blocks 541 symmetrically distributed along the central line of the centrifugal cylinder 52. Both guiding blocks 541 are fixedly connected to the outer side of the centrifugal cylinder 52. A slide bar 542 penetrating the side wall of the centrifugal cylinder 52 is slidably connected to the central position of both guiding blocks 541. One end of both slide bars 542 is fixedly connected with the same mounting plate 543. The mounting plate 543 is located inside the centrifugal cylinder 52. The mounting plate 543 is an arc-shaped plate. In the initial state, the outer wall of the mounting plate 543 fits with the inner wall of the centrifugal cylinder 52. A plurality of uniformly distributed crushing claws 544 are fixedly connected to the inner side of the mounting plate 543. An arc-shaped convex plate 55 is fixedly connected to the top end inside the box body 2. A pressing member 545 for driving the slide bar 542 to slide by abutting against the arc-shaped convex plate 55 is arranged at the other end of the slide bar 542. The pressing member 545 includes a convex block 5451. The convex block 5451 is fixedly connected to the end of the corresponding slide bar 542. A return spring 5452 is sleeved on the slide bar 542. One end of the return spring 5452 is welded to the convex block 5451. The other end of the return spring 5452 is welded to the corresponding guiding block 541.

[0022] The solid waste is introduced through the feed hopper 4, and then continues to be introduced into the centrifugal cylinder 52 through the feed pipe 51. Then, the transmission member 57 drives the feed pipe 51 to rotate, causing the centrifugal cylinder 52 to rotate. This makes all the sliding rods 542 rotate circumferentially synchronously, causing the shredding claws 544 inside each mounting plate 543 to contact the solid waste and crush it. The design of the return spring 5452 enables elastic contact between the shredding claws 544 and the solid waste, thus avoiding the problem of the shredding claws 544 being stuck due to solid waste accumulation. As the centrifugal cylinder 52 rotates, when the sliding rod 542 moves to the highest position, the convex block 5451 at the end of the sliding rod 542 contacts the arc-shaped convex plate 55 at this time, causing the convex block 5451 to be squeezed and move towards each other. This makes the sliding rod 542 move downward, and the return spring 5452 is compressed to store potential energy, causing the mounting plate 543 to drive the shredding claws 544 to move towards each other and exert a vertical impact force on the accumulated solid waste for crushing. When the convex block 5451 disengages from the arc-shaped convex plate 55, the return spring 5452 releases the potential energy, causing the sliding rod 542 to return to the initial position. In this way, the shredding claws 544 can not only exert a circumferential crushing force on the solid waste when following the circumferential movement of the centrifugal cylinder 52, but also exert a vertical impact force on the solid waste when moving to the highest position, so as to strengthen the crushing of the solid waste accumulated at the bottom of the centrifugal cylinder 52, thereby greatly improving the crushing effect.

[0023] Furthermore, the transmission member 57 includes a rotating shaft 571 passing through the side wall of the box body 2. The rotating shaft 571 is rotatably connected to the side wall of the box body 2. One end of the rotating shaft 571 is fixedly connected with a first gear 572. The first gear 572 is located inside the protective shell 56. The middle of the feed pipe 51 is fixedly connected with a second gear 573. The second gear 573 meshes with the first gear 572. A driving member 6 for driving the rotating shaft 571 to rotate is arranged outside the box body 2. The driving member 6 includes a mounting frame 61 fixedly connected to the outside of the box body 2. A motor 62 is fixedly installed inside the mounting frame 61. The output shaft of the motor 62 is fixedly connected with a third gear 63. One end of the rotating shaft 571 away from the first gear 572 is fixedly connected with a fourth gear 64. The fourth gear 64 meshes with the third gear 63. The tooth number ratio of the second gear 573 to the first gear 572 is 1:40, and the tooth number ratio of the third gear 63 to the fourth gear 64 is 1:20.

[0024] The third gear 63 is driven to rotate by starting the motor 62, causing the fourth gear 64 to rotate synchronously, causing the rotating shaft 571 to drive the first gear 572 to rotate, thus causing the second gear 573 to rotate, thereby causing the centrifugal cylinder 52 to rotate, causing all the slide rods 542 to rotate synchronously in the circumferential direction, causing the waste crushing claws 544 inside each mounting plate 543 to contact the solid waste and crush it. Since the tooth number ratio of the second gear 573 to the first gear 572 is 1:40, the rotational speed of the second gear 573 is greater than the speed of the output shaft of the motor 62, increasing the rotational speed of the centrifugal cylinder 52, and further greatly increasing the centrifugal force of the centrifugal cylinder 52, enabling the solid waste inside the centrifugal cylinder 52 to be dispersed to reduce the accumulation amount, and thus avoiding the problem of jamming of the waste crushing claws 544.

[0025] Furthermore, a material blocking mechanism 7 is provided at the bottom of the feed hopper 4. The material blocking mechanism 7 includes a baffle plate 73 penetrating the bottom wall of the feed hopper 4. The baffle plate 73 is slidably connected to the bottom wall of the feed hopper 4. A guiding groove 76 slidably engaged with the baffle plate 73 is formed inside the feed hopper 4. A push-pull rod 72 is fixedly connected to the bottom of the baffle plate 73. A guiding plate 71 is fixedly connected to the top end of the mounting frame 61. The push-pull rod 72 penetrates the guiding plate 71 and is slidably connected to the guiding plate 71. A linkage member for driving the push-pull rod 72 to slide up and down reciprocally by cooperating with the rotation of the fourth gear 64 is provided at the bottom end of the push-pull rod 72. The linkage member includes an eccentric wheel 74 coaxially and fixedly connected to the fourth gear 64. A connecting rod 75 is rotatably connected to the outer edge of the eccentric wheel 74. One end of the connecting rod 75 away from the eccentric wheel 74 is rotatably connected to the bottom end of the push-pull rod 72.

[0026] Working principle: The solid waste is introduced through the feed hopper 4, and then continuously introduced into the centrifugal cylinder 52 through the feed pipe 51. Then, the motor 62 is started to drive the third gear 63 to rotate, causing the fourth gear 64 to rotate synchronously, causing the rotating shaft 571 to drive the first gear 572 to rotate, thus causing the second gear 573 to rotate, thereby causing the centrifugal cylinder 52 to rotate, causing all the slide rods 542 to rotate synchronously in the circumferential direction, causing the waste crushing claws 544 inside each mounting plate 543 to contact the solid waste and crush it. Since the tooth number ratio of the second gear 573 to the first gear 572 is 1:40, the rotational speed of the second gear 573 is greater than the speed of the output shaft of the motor 62, increasing the rotational speed of the centrifugal cylinder 52, and further greatly increasing the centrifugal force of the centrifugal cylinder 52, enabling the solid waste inside the centrifugal cylinder 52 to be dispersed to reduce the accumulation amount. The design of the return spring 5452 enables elastic contact between the waste crushing claws 544 and the solid waste, thus avoiding the problem of jamming of the waste crushing claws 544 caused by solid waste accumulation; As the centrifugal cylinder 52 rotates, when the sliding rod 542 moves to the highest position, the convex block 5451 at the end of the sliding rod 542 abuts against the arc-shaped convex plate 55 at this time, causing the convex block 5451 to move toward each other under extrusion. This causes the sliding rod 542 to move downward, and the return spring 5452 is compressed to store potential energy, causing the mounting plate 543 to drive the waste crushing claws 544 to move toward each other and exert a vertical impact force on the accumulated solid waste for crushing. When the convex block 5451 disengages from the arc-shaped convex plate 55, the return spring 5452 releases the potential energy, causing the sliding rod 542 to return to its initial position. This cycle repeats, and when the waste crushing claws 544 move circumferentially following the centrifugal cylinder 52, they can not only exert a circumferential crushing force on the solid waste but also exert a vertical impact force on the solid waste at the highest position during movement for crushing. This can strengthen the crushing of the solid waste accumulated at the bottom of the centrifugal cylinder 52; When the fourth gear 64 rotates, the eccentric wheel 74 rotates synchronously, causing the connecting rod 75 to drive the push-pull rod 72 to slide up and down reciprocally, enabling the baffle plate 73 to intermittently cooperate with the guide groove 76. When the baffle plate 73 cooperates with the guide groove 76, the solid waste inside the feed hopper 4 cannot be introduced into the centrifugal cylinder 52. When the baffle plate 73 disengages from the guide groove 76, the feed hopper 4 continues to add material to the centrifugal cylinder 52. This cycle repeats, and intermittent feeding can be achieved inside the centrifugal cylinder 52, which can avoid the problem of jamming caused by excessive single feeding of the centrifugal cylinder 52.

[0027] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A crushing device for recycling construction solid waste, comprising a frame (1), the top of the frame (1) being fixedly connected to a box (2), the bottom of the box (2) being fixedly connected to a discharge hopper (3), and the top of the box (2) being fixedly connected to a feed hopper (4), characterized in that: A crushing mechanism (5) is arranged on the inner side of the box body (2), and the crushing mechanism (5) comprises a feed pipe (51) rotatably connected to the inner side of the box body (2), the feed pipe (51) being connected to the outlet end of the feed hopper (4), the outlet end of the feed pipe (51) being fixedly connected to a centrifugal cylinder (52), the outer side of the centrifugal cylinder (52) being provided with a plurality of evenly distributed discharge ports (53), the inner side of the centrifugal cylinder (52) being provided with a plurality of crushing components (54) for crushing solid waste by cooperating with the rotation of the centrifugal cylinder (52), the plurality of crushing components (54) being distributed at equal angles around the centrifugal cylinder (52), one end of the inner side of the box body (2) being fixedly connected to a protective shell (56), the inner side of the protective shell (56) being provided with a transmission member (57) for driving the feed pipe (51) to rotate.

2. A crushing device for recycling construction solid waste according to claim 1, characterized in that: The crushing assembly (54) comprises two guide blocks (541) symmetrically distributed along the center line of the centrifugal cylinder (52), the two guide blocks (541) are fixedly connected to the outside of the centrifugal cylinder (52), the center positions of the two guide blocks (541) are slidably connected to a slide bar (542) penetrating the side wall of the centrifugal cylinder (52), one end of the two slide bars (542) is fixedly connected to the same mounting plate (543), the mounting plate (543) is located on the inner side of the centrifugal cylinder (52), the inner side of the mounting plate (543) is fixedly connected to a plurality of evenly distributed crushing claws (544), the top end of the inner side of the box body (2) is fixedly connected to a curved convex plate (55), and the other end of the slide bar (542) is provided with a pressing piece (545) which contacts the curved convex plate (55) to drive the slide bar (542) to slide.

3. A crushing device for recycling construction solid waste according to claim 2, characterized in that: The mounting plate (543) is an arc-shaped plate, and in an initial state, an outer wall of the mounting plate (543) is in contact with an inner wall of the centrifugal cylinder (52).

4. A crushing device for recycling construction solid waste according to claim 2, characterized in that: The pressing member (545) comprises a protrusion (5451), wherein the protrusion (5451) is fixedly connected to the end of a corresponding sliding rod (542), a return spring (5452) is sleeved on the sliding rod (542), one end of the return spring (5452) is welded to the protrusion (5451), and the other end of the return spring (5452) is welded to the corresponding guide block (541).

5. The crushing device for recycling construction solid waste according to claim 1 is characterized in that: The transmission member (57) comprises a rotating shaft (571) penetrating through the side wall of the box body (2), the rotating shaft (571) being rotatably connected to the side wall of the box body (2), one end of the rotating shaft (571) being fixedly connected to a first gear (572), the first gear (572) being located on the inner side of the protective shell (56), a middle part of the feeding pipe (51) being fixedly connected to a second gear (573), the second gear (573) being meshed with the first gear (572), and a driving member (6) for driving the rotating shaft (571) to rotate is arranged on the outer side of the box body (2).

6. A crushing device for recycling construction solid waste according to claim 5, characterized in that: The driving member (6) comprises a mounting frame (61) fixedly connected to the outside of the box body (2); a motor (62) is fixedly mounted on the inside of the mounting frame (61); an output shaft of the motor (62) is fixedly connected to a third gear (63); an end of the rotating shaft (571) away from the first gear (572) is fixedly connected to a fourth gear (64); and the fourth gear (64) is meshed with the third gear (63).

7. A crushing device for recycling construction solid waste according to claim 6, characterized in that: The gear ratio between the second gear (573) and the first gear (572) is 1:40, and the gear ratio between the third gear (63) and the fourth gear (64) is 1:

20.

8. The crushing device for recycling construction solid waste according to claim 6 is characterized in that: A material blocking mechanism (7) is provided at the bottom of the feed hopper (4), and the material blocking mechanism (7) comprises a material blocking plate (73) penetrating the bottom wall of the feed hopper (4), the material blocking plate (73) being slidably connected to the bottom wall of the feed hopper (4), a push-pull rod (72) being fixedly connected to the bottom of the material blocking plate (73), a guide plate (71) being fixedly connected to the top of the mounting frame (61), the push-pull rod (72) penetrating the guide plate (71) and being slidably connected to the guide plate (71), and a linkage member is provided at the bottom end of the push-pull rod (72) for driving the push-pull rod (72) to slide reciprocally up and down by cooperating with the rotation of the fourth gear (64).

9. A crushing device for recycling construction solid waste according to claim 8, characterized in that: The inner side of the feed hopper (4) is provided with a guide groove (76) that slidably cooperates with the baffle plate (73).

10. A crushing device for recycling construction solid waste according to claim 8, characterized in that: The linkage member comprises an eccentric wheel (74) coaxially fixedly connected to the fourth gear (64); the outer edge of the eccentric wheel (74) is rotatably connected to a connecting rod (75); and one end of the connecting rod (75) away from the eccentric wheel (74) is rotatably connected to the bottom end of the push-pull rod (72).

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