CN116078475A

CN116078475A - Double-roller crusher and soil improvement equipment

Info

Publication number: CN116078475A
Application number: CN202310040810.9A
Authority: CN
Inventors: 林继铭; 林枝渝; 吴珏帆; 侯建强; 杨建红
Original assignee: Huaqiao University
Current assignee: Huaqiao University
Priority date: 2023-01-13
Filing date: 2023-01-13
Publication date: 2023-05-09

Abstract

The invention discloses a double-roller crusher and soil quality improvement equipment, wherein the double-roller crusher comprises a crusher body, at least one pair of crushing assemblies are arranged in a crushing chamber of the crusher body, each crushing assembly comprises two crushing rollers which are arranged in parallel, each crushing roller is provided with a plurality of crushing teeth, and the crushing teeth on one crushing roller are meshed with the crushing teeth on the other crushing roller; two inner side surfaces of the crushing machine body, which are opposite to each other in the distribution direction of the two crushing rollers, are respectively provided with a plurality of fixed teeth which are arranged in a row and meshed with the crushing teeth on the adjacent crushing rollers; the two crushing rollers can rotate oppositely or reversely. The structure of the double-roller crusher can solve the problems that foreign matters are not crushed by the crushing rollers and directly fall down, or the crushing rollers are blocked by the foreign matters and cannot operate.

Description

Double-roller crusher and soil improvement equipment

Technical Field

The invention relates to the field of soil improvement, in particular to a double-roller crusher and soil improvement equipment.

Background

Building slag and waste slurry generated by construction of various engineering projects are increasingly increased, and the traditional building slag and waste slurry disposal mode is outward transport dumping or stacking landfill, so that the transportation cost is high, potential safety hazards exist, and huge pressure is brought to the ecological environment, and a series of equipment is invented for recycling the building slag and waste slurry. One way of recycling the dregs is to use the building dregs as building materials or filling foundation trenches. However, such construction waste soil contains not only large foreign matters such as gravel, concrete blocks, rocks and the like, which may cause breakage of the mixing device, but also cohesive soil such as slurry, silt and the like, which may cause clogging problems of equipment, and thus the construction waste soil needs to be processed by a crusher, and the conventional twin-roll crusher is used for crushing the construction waste soil by rotating two crushing rolls in opposite directions, but the conventional structure has problems that materials are not crushed, directly fall from gaps of crushing teeth between the crushing rolls and the inner side surfaces of the crusher, the crushing rolls are caught by the foreign matters and cannot be operated, and the like.

Disclosure of Invention

The invention provides a double-roller crusher and soil improvement equipment aiming at the technical problems in the prior art, and solves the problems that materials are not crushed and directly dropped, crushing rollers are blocked by foreign matters and cannot operate through optimizing the double-roller crusher.

The technical scheme adopted for solving the technical problems is as follows: the double-roller crusher comprises a crusher body, wherein at least one pair of crushing assemblies are arranged in a crushing chamber of the crusher body, each crushing assembly comprises two crushing rollers which are arranged in parallel, a plurality of crushing teeth are respectively arranged on each crushing roller, and the crushing teeth on one crushing roller are meshed with the crushing teeth on the other crushing roller; two opposite inner side surfaces of the crushing machine body in the arrangement direction of the two crushing rollers are respectively provided with a plurality of fixed teeth which are arranged in a row and meshed with the crushing teeth on the adjacent crushing rollers; the two crushing rollers can rotate oppositely or reversely.

Further, at least one scraping component which is in one-to-one correspondence with the crushing components is arranged in the crushing chamber of the crusher body, and the scraping component comprises two supporting rods which are respectively positioned below the two crushing rollers and are parallel to the crushing rollers; a plurality of scraping teeth are respectively arranged on each supporting rod along the length direction of the supporting rod at intervals, and each scraping tooth respectively extends into gaps between axially adjacent crushing teeth on the crushing roller above the scraping teeth.

Further, the distance between the two crushing rollers is adjustable.

Further, the two crushing rollers are respectively coaxially connected with gears, the gears of the two crushing rollers are meshed with each other, and the gear on one crushing roller is driven to rotate by a driving mechanism; the gears on the two crushing rollers are long-tooth gears respectively, and the other crushing roller is movably arranged and is used for adjusting the distance between the two crushing rollers.

Further, the driving mechanism comprises a motor and a driving gear fixed on an output shaft of the motor, and the driving gear is meshed with a long gear on one of the crushing rollers.

Further, the cross sections of the crushing teeth, the fixed teeth and the central axis of the crushing roller are respectively trapezoid with wide root and narrow tail.

Further, a feeding hopper communicated with the crushing chamber is arranged at the top of the crushing machine body; the bottom of the crusher body is provided with a storage tank communicated with the crushing chamber, and the bottom end of the storage tank is provided with a discharge port and a gate for opening and closing the discharge port.

The invention also provides soil improvement equipment, which comprises a soil improvement material supply device, a mixing device, a vibrating screen device, a first conveyor belt and a second conveyor belt; the double-roller crusher is arranged above the feeding end of the first conveyor belt, the soil improvement material supply device is arranged above the discharging end of the first conveyor belt, the mixing device is arranged below the discharging end of the first conveyor belt and above the feeding end of the second conveyor belt, and the vibrating screen device is arranged below the discharging end of the second conveyor belt.

Further, the device also comprises a magnetic separator which is arranged on the first conveyor belt and is positioned between two ends of the first conveyor belt, so as to remove magnetic substances which are processed by the double-roller crusher and fall into the crushed soil on the first conveyor belt.

Further, the vibrating screen device is provided with a first outlet and a second outlet which can output modified soil with different particle sizes, a third conveyor belt is arranged at the first outlet, and a fourth conveyor belt is arranged at the second outlet.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the two opposite inner side surfaces of the crushing machine body in the arrangement direction of the two crushing rollers are respectively provided with the plurality of fixed teeth, and the two crushing rollers can rotate oppositely or rotate reversely, so that the fixed teeth can be used for filling gaps of the crushing teeth between the crushing rollers and the inner side surfaces of the crushing chamber, materials put into the crushing chamber are prevented from directly falling from the gaps and not being crushed, and when the crushing rollers are blocked by foreign matters, the two crushing rollers can rotate reversely to be matched with the corresponding fixed teeth to realize the foreign matter crushing treatment, so that the crushing rollers are prevented from being inoperable.

2. The crushing machine is characterized in that at least one scraping component in one-to-one correspondence with the crushing components is further arranged in the crushing chamber of the crushing machine body and used for scraping viscous attachments between crushing teeth, so that the problem of sticking and blocking in the crushing process is prevented, and the crushing effect is influenced.

3. The distance between the two crushing rollers is adjustable, so that the gap between the crushing teeth can be adjusted by adjusting the distance between the two crushing rollers, the granularity of the crushed soil is further controlled, and the crushing capacity of the double-roller crusher can be recovered by properly shortening the distance between the two crushing rollers under the condition that the crushing teeth are worn.

4. The two crushing rollers are respectively coaxially connected with gears, the gears of the two crushing rollers are meshed with each other, and the gears on one crushing roller are driven to rotate by a driving mechanism, so that the two crushing rollers can be driven to rotate oppositely or rotate back by adopting one set of driving mechanism. Particularly, the gears on the two crushing rollers are long-tooth gears respectively, and the other crushing roller is movably arranged, so that after the distance between the two crushing rollers is increased (the distance is adjusted in a reasonable range), the gears on the two crushing rollers can still be kept in an effectively meshed state, and the two crushing rollers can work normally.

5. The cross sections of the crushing teeth, the fixed teeth and the central axis of the crushing roller are respectively in a trapezoid shape with wide root parts and narrow tail parts, after the distance between the two crushing rollers is adjusted, the distance between the meshed teeth in the radial direction of the crushing roller can be adjusted, and the distance between the meshed teeth in the axial direction of the crushing roller can be increased or decreased, so that the synchronous consistency of the distance adjustment of the meshed teeth in the radial direction and the axial direction of the crushing roller is ensured, and the consistency of crushing granularity is also ensured.

6. The magnetic separator is arranged, so that magnetic substances which are treated by the double-roller crusher and fall into the crushed soil on the first conveyor belt can be removed, and the cleanliness of the crushed soil is improved.

The invention is described in further detail below with reference to the drawings and examples; however, the double roller crusher and the soil improvement apparatus of the present invention are not limited to the embodiments.

Drawings

FIG. 1 is a schematic view of a twin roll crusher according to the present invention;

FIG. 2 is a crushing tooth bite of the twin roll crusher of the present invention;

FIG. 3 is a schematic cross-sectional view at A-A of FIG. 1;

FIG. 4 is a schematic illustration of the fit of the crushing teeth of the twin roll crusher with the stationary teeth of the present invention;

FIG. 5 is a schematic diagram showing the cooperation of crushing teeth and fixed teeth of a twin roll crusher according to the present invention;

FIG. 6 is a schematic view of the structure of the soil improvement device of the present invention;

in the figure: 1. a twin roll crusher; 10. a crushing assembly; 101/102, crushing rollers; 11. crushing teeth; 12. scraping teeth; 13. a fixed tooth; 14. a support rod; 15. a feed hopper; 16. a crushing chamber; 17. a gate; 18. a storage tank; 19. a discharge port; 2. a magnetic separator; 3. a cured product supply device; 4. a mixing device; 5. a vibrating screen device; 6. a first conveyor belt; 7. a second conveyor belt; 8. a third conveyor belt; 9. and a fourth conveyor belt T for adhering objects.

Detailed Description

In the present invention, the terms "first," "second," "third," "fourth," and the like are used merely to distinguish between similar objects and are not necessarily used to describe a particular order or sequence, nor are they to be construed as indicating or implying relative importance. In the description, the directions or positional relationships indicated by "upper", "lower", "left", "right", etc. are used based on the directions or positional relationships shown in the drawings, only for convenience of describing the present invention, and are not intended to indicate or imply that the apparatus must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the scope of protection of the present invention. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In addition, in the description of the present application, unless otherwise indicated, "a plurality" means two or more, and "at least one" means a number of one or more.

Referring to fig. 1-5, a twin roll crusher of the present invention includes a crushing machine body, at least one pair of crushing assemblies are disposed in a crushing chamber 16 of the crushing machine body, the crushing assembly 10 includes two crushing

rolls

101, 102 disposed in parallel, the two crushing

rolls

101, 102 are disposed along a horizontal direction, each crushing roll is respectively provided with a plurality of crushing teeth 11, specifically, the plurality of crushing teeth 11 are divided into a plurality of subgroups uniformly disposed along an axial direction of the crushing roll, and each subgroup includes a plurality of crushing teeth uniformly disposed along a circumferential direction of the crushing roll. The crushing teeth on the crushing roller 101 intermesh with the crushing teeth on the crushing roller 102. Two opposite inner side surfaces of the crushing chamber 16 of the crusher body in the arrangement direction of the two crushing rollers are respectively provided with a plurality of fixed teeth 13, and the fixed teeth 13 are arranged in a row and meshed with the crushing teeth on the adjacent crushing rollers; the two crushing

rolls

101, 102 may be rotated towards each other or against each other. The plurality of fixed teeth 13 are used for filling the tooth gaps of the crushing teeth between the crushing

rollers

101 and 102 and the inner side surface of the crushing chamber 16, preventing the materials entering the crushing chamber 16 from directly falling from the tooth gaps without being crushed, and being matched with the crushing teeth to crush the materials when the crushing

rollers

101 and 102 are reversed. The tooth gap refers to the distance between adjacent crushing teeth on the same crushing roller in the axial direction of the crushing roller. In the present embodiment, the two crushing

rollers

101, 102 are specifically arranged along the left-right direction of the crushing chamber 16, as shown in fig. 1, but not limited thereto. The number of the crushing assemblies is specifically one pair, but is not limited thereto, and in other embodiments, two or more pairs of the crushing assemblies may be provided according to actual needs.

In this embodiment, at least one scraping component corresponding to the crushing components one by one is further disposed in the crushing chamber 16 of the crusher body, and the scraping component includes two support rods 14, where the two support rods 14 are respectively located below the two crushing

rollers

101 and 102 and are respectively parallel to the crushing

rollers

101 and 102; each supporting rod is respectively provided with a plurality of scraping teeth 12 which are distributed at intervals along the length direction, and each scraping tooth 12 respectively extends into gaps between axially adjacent crushing teeth (namely, the tooth gaps) on the crushing roller above the scraping teeth. The height of each scraping tooth 12 is set within a reasonable range, both to ensure that the viscous material T on the crushing

rolls

101, 102 is scraped off and to ensure that the normal rotation of the crushing

rolls

101, 102 is not affected.

In this embodiment, the distance between the two crushing

rollers

101, 102 is adjustable. The two crushing

rollers

101 and 102 are respectively coaxially connected with a gear (not shown in the figure), the gears of the two crushing

rollers

101 and 102 are meshed with each other, and the gears on the crushing roller 101 are driven to rotate by a driving mechanism, so that the two crushing rollers can be driven to rotate oppositely or reversely by adopting one set of driving mechanism. The crushing roller 102 is movably arranged, as shown in fig. 2, in which the double arrow indicates the direction of movement of the crushing roller 102. Specifically, two opposite side walls of the crushing chamber 16 may be respectively provided with elongated holes extending horizontally, so that two ends of the crushing roller 102 respectively pass through the corresponding elongated holes, and are locked by screws after the crushing roller 102 is adjusted in position. Thus, by moving the position of the crushing roller 102, the distance between the crushing teeth of the two crushing

rollers

101, 102 can be adjusted, thereby controlling the granularity of the crushed soil, and the distance between the two crushing

rollers

101, 102 can be appropriately shortened in the event of wear of the crushing teeth 11, thereby restoring the crushing capacity of the twin-roll crusher 1. The gears on the two crushing

rollers

101 and 102 are long-tooth gears respectively, so that after the distance between the two crushing

rollers

101 and 102 is increased (the distance is adjusted in a reasonable range), the gears on the two crushing

rollers

101 and 102 can still be kept in an effectively meshed state, and the two crushing rollers can work normally.

In this embodiment, the driving mechanism comprises a motor and a driving gear fixed on an output shaft of the motor, and the driving gear is meshed with a gear on the crushing roller 101.

In this embodiment, a feeding hopper 15 is arranged at the top of the crushing machine body and is communicated with the crushing chamber 16; the bottom of the crusher body is provided with a storage tank 18 communicated with the crushing chamber 16, and the bottom end of the storage tank 18 is provided with a discharge port 19 and a gate 17 for opening and closing the discharge port 17. The gate 17 may be manually operated to open and close the discharge port 17, or may be driven by an electric mechanism, such as a motor, to rotate to open and close the discharge port 17.

In this embodiment, the sections of the crushing teeth 11, the fixed teeth 13 parallel to the central axes of the crushing

rollers

101, 102 are respectively trapezoidal with wide root and narrow tail, so that after the distance between the two crushing rollers is adjusted, the distance between the engaged teeth in the radial direction of the crushing rollers can be adjusted, and the distance between the engaged teeth in the axial direction of the crushing rollers can be changed, thereby ensuring the synchronous consistency of the distance adjustment of the engaged teeth in the radial direction and the axial direction of the crushing rollers, and ensuring the consistency of crushing granularity. As shown in fig. 4, when the distance between the crushing

rolls

101 and 102 is increased, the distance between the crushing teeth 11 and the fixed teeth 13 in the radial direction and the axial direction of the crushing rolls is smaller; as shown in fig. 5, when the distance between the crushing rolls is reduced, the distance between the crushing teeth 11 and the fixed teeth 13 in the radial direction and the axial direction of the crushing rolls is increased. For the crushing teeth of the two crushing rollers, after the distance between the two crushing rollers is reduced, the distance between the crushing teeth which are meshed with each other in the radial direction and the axial direction of the crushing rollers is reduced, and after the distance between the two crushing rollers is increased, the distance between the crushing teeth which are meshed with each other in the radial direction and the axial direction of the crushing rollers is increased. The cross section of the scraping teeth 12 parallel to the central axis of the crushing

rollers

101 and 102 is also trapezoid with wide root and narrow tail. The trapezoid is preferably an isosceles trapezoid.

The working principle of the double-roller crusher is described below.

Referring to fig. 1-6, an apparatus for improving soil according to the present invention includes a device for supplying a soil improving material 3, a mixing device 4, a vibrating screen device 5, a first conveyor belt 6, a second conveyor belt 7, and a twin-roll crusher 1, wherein the twin-roll crusher 1 is a twin-roll crusher according to the present invention in the above embodiment, the twin-roll crusher 1 is disposed above a feeding end of the first conveyor belt 6, the device for supplying the soil improving material 3 is disposed above a discharging end of the first conveyor belt, the mixing device 4 is disposed below the discharging end of the first conveyor belt 6 and above the feeding end of the second conveyor belt 7, and the vibrating screen device 5 is disposed below the discharging end of the second conveyor belt 7.

In this embodiment, the magnetic separator 2 is disposed on the first conveyor belt 6 and located between two ends of the first conveyor belt 6, so as to remove magnetic substances in the crushed soil processed by the twin-roll crusher 1 and falling onto the first conveyor belt 6. In particular, the magnetic separator 2 is disposed at a position substantially in the middle of the first conveyor belt 6.

In this embodiment, the vibrating screen device 5 is provided with a first outlet and a second outlet which can output modified soil with different particle sizes, the first outlet is provided with a third conveyor belt 8, and the second outlet is provided with a fourth conveyor belt 9. The first outlet can output materials with the grain diameter of below 30mm or below 50mm, and the second outlet can output materials with the grain diameter of above 30mm or above 50 mm.

The invention relates to soil property improvement equipment, which comprises the following working principle and steps:

building residue soil produced at a construction site, such as a material containing adhesion of rocks, clay, slurry, etc., contains concrete blocks, reinforcing bars, etc., in blocks produced when demolishing or destroying a building, and is conveyed as soil to be treated from a conveyor belt (not shown) into a hopper 15, and the soil to be treated is introduced into a crushing chamber 16 between two crushing

rollers

101, 102 through the hopper 15. The crushing rolls 101, 102 of the twin roll crusher 1 are rotated in opposite directions by motor drive (as shown in fig. 1, the arrows on the two crushing

rolls

101, 102 indicate the rotation directions of the two crushing rolls), and the engagement of the crushing teeth 11 of the two crushing

rolls

101, 102 generates extrusion and shearing forces to crush the soil to be treated, and the crushed soil falls on the first conveyor belt 6 below. When clay, mud and other viscous substances are contained in the soil to be treated, the viscous substances adhere to the surfaces of the crushing

rolls

101, 102 and the crushing teeth 11, accumulate between the teeth 11, and as shown in fig. 3, the spaces between the crushing teeth 11 are filled with the viscous substances T. Since the scraping teeth 12 are arranged below the crushing

rollers

101 and 102, after the crushing

rollers

101 and 102 rotate for half a circle, the viscous substance T is scraped off by the scraping teeth 12 and falls onto the first conveyor belt 6 below together with the crushed soil to be treated. When the amount of soil to be treated increases beyond the maximum output of the first conveyor belt 6, the gate 17 is temporarily closed and the crushed soil to be treated falls into the storage tank 18 to maintain a stable output on the first conveyor belt 6.

When foreign matter in the soil to be treated cannot be crushed by the crushing

rollers

101, 102 or the crushing

rollers

101, 102 are caught by the foreign matter and cannot be operated, the crushing

rollers

101, 102 may be rotated in the reverse direction (i.e., the rotation directions of the two crushing

rollers

101, 102 are opposite to the rotation directions indicated by the arrows on the two crushing

rollers

101, 102 in fig. 1), respectively, so that the foreign matter is crushed or removed between the crushing teeth 11 and the fixed teeth 13. Furthermore, the fixed teeth 13 may fill the tooth gaps of the crushing teeth between the crushing

rollers

101, 102 and the inner side surface of the crushing chamber 16, preventing the graph to be treated entering the crushing chamber 16 from falling directly from the tooth gaps without being crushed.

The soil to be treated which falls onto the first conveyor belt 6 is removed of ferromagnetic substances such as steel bars contained therein by the magnetic separator 2. The first conveyor belt 6 continues to convey the soil to be treated past the soil improvement material supply device 3, and at this time, the soil improvement material supply device 3 inputs a curing agent composed of the soil improvement material in a fixed amount onto the soil to be treated in the course of conveyance. Then the soil to be treated and the curing agent are conveyed to the mixing device 4 by the first conveyor belt 6, stirred and mixed in the mixing device 4, uniformly mixed and then discharged to the second conveyor belt 7, and conveyed to the vibrating screen device 5 by the second conveyor belt 7. In the vibrating screen device 5, particle size screening is performed to screen out the pieces mixed in the soil to be treated, the pieces having a particle size of 30mm or less or 50mm or less fall as modified soil from the first outlet into the third conveyor 8 and are conveyed out, and the pieces having a particle size of 30mm or more or 50mm or more fall from the second outlet into the fourth conveyor 9 and are conveyed out for post-treatment.

The improved soil conveyed by the third conveyor belt 8 can be used as building materials or foundation trench filling, and the treated soil with more than a certain granularity conveyed by the fourth conveyor belt 9 can be conveyed into the double-roller crusher 1 again for retreatment, and finally treated as the improved soil after being crushed again.

In addition, when the distance between the crushing

rolls

101, 102 is properly adjusted, the gap between the crushing teeth 11 should not be made too small in order to meet the crushing grain size requirement at one time, which greatly reduces the throughput of the twin roll crusher 1. The treated soil with larger grain size can be screened out by the vibrating screen device 5, and then put into the double-roller crusher 1 with reduced space between the crushing

rollers

101 and 102 again for secondary crushing.

The invention relates to a double-roller crusher and soil property improvement equipment, which are not related to the same parts as the prior art or can be realized by adopting the prior art.

The above embodiments are only used to further illustrate a twin-roll crusher and soil improvement apparatus of the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention falls within the scope of the technical solution of the present invention.

Claims

1. The double-roller crusher comprises a crusher body, wherein at least one pair of crushing assemblies are arranged in a crushing chamber of the crusher body, each crushing assembly comprises two crushing rollers which are arranged in parallel, a plurality of crushing teeth are respectively arranged on each crushing roller, and the crushing teeth on one crushing roller are meshed with the crushing teeth on the other crushing roller; the method is characterized in that: two opposite inner side surfaces of the crushing machine body in the arrangement direction of the two crushing rollers are respectively provided with a plurality of fixed teeth which are arranged in a row and meshed with the crushing teeth on the adjacent crushing rollers; the two crushing rollers can rotate oppositely or reversely.

2. The twin roll crusher of claim 1, wherein: the crushing machine comprises a crushing machine body, wherein the crushing machine body is provided with a crushing roller, a crushing chamber is arranged in the crushing machine body, at least one scraping assembly is arranged in the crushing chamber, the scraping assembly corresponds to the crushing assembly one by one, the scraping assembly comprises two supporting rods, and the two supporting rods are respectively positioned below the two crushing rollers and are parallel to the crushing rollers; a plurality of scraping teeth are respectively arranged on each supporting rod along the length direction of the supporting rod at intervals, and each scraping tooth respectively extends into gaps between axially adjacent crushing teeth on the crushing roller above the scraping teeth.

3. The twin roll crusher of claim 1, wherein: the distance between the two crushing rollers is adjustable.

4. A twin roll crusher as defined in claim 3, in which: gears are coaxially connected to the two crushing rollers respectively, the gears of the two crushing rollers are meshed with each other, and the gear on one crushing roller is driven to rotate by a driving mechanism; the gears on the two crushing rollers are long-tooth gears respectively, and the other crushing roller is movably arranged and is used for adjusting the distance between the two crushing rollers.

5. The twin roll crusher of claim 4, wherein: the driving mechanism comprises a motor and a driving gear fixed on an output shaft of the motor, and the driving gear is meshed with a gear on one of the crushing rollers.

6. The twin roll crusher according to any one of claims 1-5, characterized in that: the sections of the crushing teeth, the fixed teeth and the central axis of the crushing roller, which are parallel, are respectively trapezoidal with wide root parts and narrow tail parts.

7. The twin roll crusher according to any one of claims 1-5, characterized in that: the top of the crusher body is provided with a feed hopper communicated with the crushing chamber; the bottom of the crusher body is provided with a storage tank communicated with the crushing chamber, and the bottom end of the storage tank is provided with a discharge port and a gate for opening and closing the discharge port.

8. An apparatus for improving soil properties, comprising a soil improvement material supply device, a mixing device, a vibrating screen device, a first conveyor belt and a second conveyor belt; the method is characterized in that: the double-roller crusher according to any one of claims 1 to 7 is arranged above the feeding end of the first conveyor belt, the soil improvement material supply device is arranged above the discharging end of the first conveyor belt, the mixing device is arranged below the discharging end of the first conveyor belt and above the feeding end of the second conveyor belt, and the vibrating screen device is arranged below the discharging end of the second conveyor belt.

9. The soil improvement apparatus according to claim 8, wherein: the magnetic separator is arranged on the first conveyor belt and is positioned between two ends of the first conveyor belt, so that magnetic substances which are processed by the double-roller crusher and fall into crushed soil on the first conveyor belt can be removed.

10. The soil improvement apparatus according to claim 8, wherein: the vibrating screen device is provided with a first outlet and a second outlet which can output modified soil with different particle sizes, a third conveyor belt is arranged at the first outlet, and a fourth conveyor belt is arranged at the second outlet.