CN114669588A - Device for repairing and improving heavy metal contaminated soil and using method thereof - Google Patents

Abstract

The invention relates to a soil repairing and improving technology, which is used for solving the problems that the prior soil repairing device needs to take soil into a container for improving and repairing when in use, has complex working procedures and low soil repairing efficiency, and in particular relates to a device for repairing and improving heavy metal contaminated soil and a using method thereof; according to the invention, firstly, soil is crushed, so that the subsequent soil mixing and stirring function can be smoothly realized, the soil is stirred through the turntable and the cutting block, part of soil passes through holes below the cutting block, the full mixing and stirring of a medicament in the released soil can be ensured, the medicament spreading range is improved, the medicament curing coverage rate is increased, the lifting of the first connecting rod and the second connecting rod is controlled through the lifting driving motor, the height adjustment of the fixed feeding pipe and the turntable can be realized, so that the turntable acts on the soil at different depths, and the medicament spreading accuracy is improved.

Description

Device for repairing and improving heavy metal contaminated soil and using method thereof

Technical Field

The invention relates to a soil repairing and improving technology, in particular to a device for repairing and improving heavy metal contaminated soil and a using method thereof.

Background

Soil pollution can seriously threaten ecosystem's function, food safety and human settlements safety, and soil pollution has characteristics such as disguise, hysteresis quality and accumulative nature, compares in the pollution of other environment media, and soil pollution is more difficult to discover and is difficult to administer, and heavy metal is the most outstanding pollutant of soil, and the pollution of heavy metal is inevitable in administering soil through the science, but soil heavy metal pollution cause is complicated, presents following characteristic usually: the method has the advantages that various heavy metal pollutants coexist and are concentrated into large-scale distribution, so that the environmental quality is seriously influenced, the method is used for treating the multi-metal composite polluted soil, and the solidification or stabilization is the most common technology for repairing the heavy metal pollution of the soil, so that the reasonable resistance control of the migration risk of the soil pollutants is realized;

at present, in the process of repairing and improving soil, the existing heavy metal contaminated soil repairing and improving device collects soil into a container, then adds and stirs a medicament in the container, and then discharges the soil after stirring, and the process needs frequent collection and discharge of soil, and meanwhile, the soil is stirred in the container, which wastes time and labor, so that the soil repairing efficiency is extremely low, and the device is not beneficial to efficiently treating large-area heavy metal contaminated soil;

in view of the above technical problems, the present application proposes a solution.

Disclosure of Invention

In the invention, because the polluted soil is easy to be dried and caked, and the caked soil is unfavorable for the spreading of the medicament, the soil is firstly crushed in the working process of the soil repairing and improving device, thereby ensuring that the subsequent soil mixing and stirring function can be smoothly realized; meanwhile, the crushing teeth on the crushing roller are usually in a withdrawing state, and can be withdrawn and extruded to protrude only when rotating to the lower part, thereby avoiding workers with damaged teeth or other articles on the crushing roller, improving the use safety, stirring the soil through the turntable and the cutting block, enabling partial soil to pass through holes below the cutting block, ensuring that the medicament can be fully mixed and stirred after being in the released soil, improving the dispersion range of the medicament, increasing the curing coverage rate of the medicament, and enabling the medicament in the feeding hopper to fall more smoothly by the vibration of the motor, controlling the lifting of the first connecting rod and the second connecting rod through the lifting driving motor, and realizing the height adjustment of the fixed feeding pipe and the turntable, thereby enabling the turntable to act on the soil with different depths, and realizing the timely height adjustment of the turntable according to different pollution conditions, the accuracy of agent spreading is improved, the problems that the existing soil remediation device needs to take soil into a container for improvement and remediation when in use, the process is complex, and the soil remediation efficiency is low are solved, and the remediation and improvement device for the heavy metal contaminated soil and the use method thereof are provided.

The purpose of the invention can be realized by the following technical scheme:

a device for repairing and improving heavy metal contaminated soil comprises a crushing roller, wherein a central shaft penetrates through the center of the crushing roller, the central shaft is fixed at one end of a main frame, a cam is fixedly connected to the outer wall of the central shaft, a support frame is fixedly installed at one end of the crushing roller, a driving gear is fixedly connected to the outer wall of the support frame, and the support frame and the driving gear are rotatably connected to the outer wall of the central shaft;

the crushing roller is provided with a plurality of groups of holes, the inner wall of the crushing roller is fixedly connected with a reset spring through a bulge, the top of the reset spring is fixedly connected with a concave plate, the lower surface of the concave plate is fixedly connected with crushing teeth, the crushing teeth penetrate through the holes on the crushing roller, the outer wall of the driving gear is sleeved with a first connecting belt, the other end of the first connecting belt is sleeved on an output shaft of a first driving motor, the first driving motor is fixedly arranged on the upper surface of a reinforcing rod, two ends of the reinforcing rod are respectively abutted against two sides of a main frame, a plurality of groups of rake teeth are fixedly connected with the lower surface of the reinforcing rod, the tail part of the main frame is fixedly provided with two groups of lantern rings, the interiors of the two groups of lantern rings are respectively and slidably connected with a first connecting rod and a second connecting rod, the bottoms of the first connecting rod and the second connecting rod are respectively and fixedly connected with a connecting bearing, and the interior of the connecting bearing is rotatably connected with a fixed feeding pipe, the device comprises a fixed inlet pipe, a conveying pipe, a turntable, a motor and a motor, wherein one end of the fixed inlet pipe is movably connected with the conveying pipe, one end of the conveying pipe, which is far away from the fixed inlet pipe, is fixedly connected with the turntable, and the other end of the fixed inlet pipe is connected with the conveying motor.

As a preferred embodiment of the present invention, a mounting frame is fixedly connected to a side wall of the main frame, a through shaft is rotatably connected to a top of the mounting frame, a belt pulley and a driving wheel are fixedly connected to an outer wall of the through shaft, the belt pulley is fixedly connected between two sets of driving wheels, a first driving rod and a second driving rod are rotatably connected to two sides of the driving wheel through a rotating shaft, a first driven wheel is rotatably connected to one end of the first driving rod away from the driving wheel through the rotating shaft, a second driven wheel is rotatably connected to one end of the second driving rod away from the driving wheel through the rotating shaft, the first driven wheel is rotatably connected to the side wall of the main frame through the rotating shaft, the second driven wheel is rotatably connected to an outer wall of the sleeve ring through the rotating shaft, racks are respectively disposed on one side of the first connecting rod and one side of the second connecting rod, and the first driven wheel is engaged with the first connecting rod, the second is connected with the second connecting rod from the driving wheel meshing, the belt pulley outer wall is around having the second to connect the belt, the second is connected the belt top and is around connecing at the lift driving motor output.

As a preferred embodiment of the present invention, the feeding pipe is rotatably connected to an outer wall of the fixed feeding pipe, a hollow hole is formed in the rotary table, a medicine dispersing pipe is fixedly installed on one side of the rotary table away from the feeding pipe, a connecting frame is fixedly installed in the feeding pipe, a feeding screw is rotatably connected to the inside of the fixed feeding pipe, one end of the feeding screw is fixedly connected to a side wall of the connecting frame, the other end of the feeding screw is connected to an output end of the conveying motor, a feeding hopper is communicated with an upper portion of the fixed feeding pipe, and the conveying motor is fixedly connected to an outer wall of the feeding hopper.

In a preferred embodiment of the present invention, the protruding end of the cam faces directly below, and the reinforcing bar has a broken line type structure.

In a preferred embodiment of the present invention, the connection points of the first driving rod and the second driving rod with the driving wheel are located on the same diameter, and the lifting driving motor is fixedly connected to the upper surface of the main frame.

As a preferred embodiment of the present invention, the outer wall of the medicine dispersing pipe is provided with a plurality of groups of holes, one side of the turntable, which is close to the medicine dispersing pipe, is fixedly connected with a plurality of groups of cutting blocks, and the turntable is provided with a through hole at a position below the cutting blocks.

As a preferred embodiment of the present invention, a telescopic rod is fixedly connected to a lower portion of the main frame, a support spring is sleeved on an outer side of the telescopic rod, and a roller is rotatably connected to a lower portion of the telescopic rod.

A use method of the device for repairing and improving the heavy metal contaminated soil comprises the following steps:

the method comprises the following steps: the device is placed in soil to be restored and improved, a first driving motor is started, the first driving motor drives a driving gear to rotate through a first connecting belt, the driving gear drives a crushing roller to rotate through a supporting frame, and the crushing roller rotates on the surface of the soil to realize integral walking of the device;

step two: when the crushing roller rotates, the concave plate, the return spring and the crushing teeth in the crushing roller pass through the bulge part below the cam one by one, so that the crushing teeth passing through the bulge part are ejected out by the cam and inserted into soil, the dried and caked soil is crushed, and subsequent medicament mixing is facilitated;

step three: when the crushing roller rotates, the harrow teeth are driven to scratch through crushed soil to turn soil, large stones in the soil are pushed aside to two sides, the rotary table is prevented from contacting the stones, the cutting block is prevented from being damaged, meanwhile, according to the soil depth to be treated, the lifting driving motor drives the driving wheel to rotate, the heights of the first connecting rod and the second connecting rod are controlled through the driving wheel, the position of the rotary table is further controlled, and the soil treatment depth is adjusted;

step four: the crushing roller can drive the rotary table to advance in soil simultaneously when rotating, the rotary table drives the feeding screw rod to rotate through a rear conveying motor when advancing, the feeding screw rod drives the conveying pipe to rotate, the rotary table is driven to rotate when the conveying pipe rotates, soil is stirred through the cutting block and is enabled to pass through holes in the surface of the rotary table, meanwhile, when the feeding screw rod rotates, the feeding screw rod can continuously push the medicament in the fixed feeding pipe forwards, and the medicament passes through the conveying pipe and the rotary table, enters the medicament dispersing pipe and is released into the soil;

step five: the agent released into the soil and the heavy metal pollutants in the soil have physicochemical action, and the metal pollutants which are easy to migrate and be easily absorbed by organisms are fixed into nontoxic or low-toxicity stable substances, so that the migration and bioavailability of the pollutants are reduced, and the harmless treatment of the soil is realized.

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

1. in the invention, when the soil is repaired, because the polluted soil is easy to be dried and caked, and the caked soil is unfavorable for the spreading of the medicament, the soil is firstly crushed in the working process of the soil repairing and improving device, thereby ensuring that the subsequent soil mixing and stirring function can be smoothly realized; meanwhile, the crushing teeth on the crushing roller are usually in a withdrawing state, and only when the crushing roller rotates to the lower part, the extrusion protrusion can be withdrawn, so that workers or other articles with damaged teeth on the crushing roller are avoided, and the use safety is improved.

2. According to the invention, the soil is stirred through the turntable and the cutting block, and part of the soil passes through the hole below the cutting block, so that the medicament can be fully mixed and stirred after being released in the soil, the spreading range of the medicament is improved, the curing coverage rate of the medicament is increased, meanwhile, the feeding of the medicament is pushed by the feeding screw rod, so that high pressure is provided in the medicament dispersing pipe, the soil is prevented from flowing backwards, the motor for driving the screw rod is arranged on the feeding hopper, and the medicament in the feeding hopper can be more smoothly dropped due to the vibration of the motor.

3. According to the invention, the lifting driving motor is used for controlling the steering of the driving wheel, and the driving wheel is used for controlling the lifting of the first connecting rod and the second connecting rod, so that the height of the fixed feeding pipe and the rotary table can be adjusted, the rotary table acts on the soil with different depths, the height of the rotary table can be adjusted timely according to different pollution conditions, the accuracy of agent spreading is improved, and the soil repairing and improving effects are improved.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic front view of the structure of the present invention;

FIG. 2 is a schematic view of a crushing roller of the present invention;

FIG. 3 is an enlarged view of the structure at A in FIG. 2 according to the present invention;

FIG. 4 is an enlarged view of the structure at B in FIG. 2 according to the present invention;

FIG. 5 is a schematic view of the drive rod of the present invention;

FIG. 6 is a schematic view of the driving wheel of the present invention;

FIG. 7 is a schematic view of the turntable structure of the present invention;

FIG. 8 is a schematic view of the structure of the fixed feed tube of the present invention.

In the figure: 1. a crushing roller; 2. a main frame; 3. a support frame; 4. a drive gear; 5. a first connecting belt; 6. a first drive motor; 7. a cam; 8. a central shaft; 9. a concave plate; 10. a return spring; 11. crushing teeth; 12. rake teeth; 13. a reinforcing rod; 14. a first driven wheel; 15. a first connecting rod; 16. a second connecting rod; 17. a second driven wheel; 18. a first drive lever; 19. a second drive lever; 20. a second connecting strap; 21. connecting a bearing; 22. a lifting drive motor; 23. a drive wheel; 24. a belt pulley; 25. penetrating the shaft; 26. a mounting frame; 27. a turntable; 28. a medicine dispersing pipe; 29. a cutting block; 30. a delivery pipe; 31. a connecting frame; 32. a feed screw; 33. fixing a feeding pipe; 34. a conveying motor; 35. a feed hopper; 36. a collar; 37. a roller; 38. a telescopic rod; 39. supporting the spring.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1-3, a device for repairing and improving heavy metal contaminated soil comprises a crushing roller 1, wherein a central shaft 8 penetrates through the center of the crushing roller 1, two ends of the central shaft 8 protrude out of the crushing roller 1, the central shaft 8 is fixed at one end of a main frame 2, the main frame 2 is in a U-shaped structure, the central shaft 8 is positioned on the opening side of the U-shaped structure, a cam 7 is fixedly connected to the outer wall of the central shaft 8, the protruding end of the cam 7 faces to the right lower side, a reinforcing rod 13 is in a broken line type structure, a support frame 3 is fixedly installed at one end of the crushing roller 1 and plays a role of assisting in supporting the crushing roller 1, a drive gear 4 is fixedly connected to the outer wall of the support frame 3, and the support frame 3 and the drive gear 4 are rotatably connected to the outer wall of the central shaft 8;

the crushing roller 1 is provided with a plurality of groups of holes which are distributed on the outer wall of the crushing roller 1 in a matrix shape, the inner wall of the crushing roller 1 is fixedly connected with a reset spring 10 through a protrusion, the protrusion is in a ring shape and is used for supporting the reset spring 10, the top of the reset spring 10 is fixedly connected with a concave plate 9, the upper surface of the concave plate 9 is in a circular arc shape and is convenient to slide on the outer wall of a cam 7 when being contacted with the cam 7, the lower surface of the concave plate 9 is fixedly connected with crushing teeth 11, the crushing teeth 11 are in a conical shape, the conical tips face outwards, the crushing teeth 11 penetrate through the holes on the crushing roller 1, the front parts of the crushing teeth 11 can be ejected out when the concave plate 9 is pressed downwards, so that the crushing teeth are exposed out of the holes on the crushing roller 1, the outer wall of a driving gear 4 is sleeved with a first connecting belt 5, the other end of the first connecting belt 5 is sleeved on an output shaft of a first driving motor 6, a plurality of groups of tooth grooves are formed in the inner side of the first connecting belt 5, the driving gear 4 is meshed and connected inside the tooth socket, the first driving motor 6 is fixedly installed on the upper surface of the reinforcing rod 13, the first driving motor 6 can drive the driving gear 4 to rotate through the first connecting belt 5 when rotating, the driving gear 4 drives the crushing roller 1 to rotate through the support frame 3 when rotating, when soil remediation is carried out, the device is placed in soil to be remedied and improved, the first driving motor 6 is started, the first driving motor 6 drives the driving gear 4 to rotate through the first connecting belt 5, the driving gear 4 drives the crushing roller 1 to rotate through the support frame 3, the crushing roller 1 rotates on the soil surface to realize integral walking of the device, when the crushing roller 1 rotates, the concave plate 9, the reset spring 10 and the crushing teeth 11 inside the crushing roller 1 pass through the convex part below the cam 7 one by one, when the concave plate 9 passes through the convex point below the cam 7, the cam 7 extrudes the concave plate 9, the concave plate 9 is made to extrude the reset spring 10, the crushing teeth 11 are driven to extend out of the crushing roller 1 to crush soil, dried and caked soil is crushed, subsequent medicament mixing is facilitated, the friction force of the crushing roller 1 can be increased by the crushing teeth 11 inserted into the soil, the crushing roller 1 can provide larger tension for a soil repairing and improving device when rotating, the crushing roller 1 is prevented from slipping, two ends of the reinforcing rod 13 are respectively abutted against two sides of the main frame 2 to increase the strength of the main frame 2, a plurality of groups of rake teeth 12 are fixedly connected to the lower surface of the reinforcing rod 13, the crushing roller 1 moves forwards when rotating, the rake teeth 12 are driven to cross the crushed soil to turn over the soil, large stones in the soil are pulled to two sides, the rotary table 27 is prevented from contacting the stones, the cutting block 29 is prevented from being damaged, two groups of lantern rings 36 are fixedly installed at the tail of the main frame 2, a first connecting rod 15 and a second connecting rod 16 are respectively and slidably connected inside the two groups of lantern rings 36, the first connecting rod 15 and the second connecting rod 16 can slide up and down in the lantern ring 36, a telescopic rod 38 is fixedly connected to the lower portion of the main frame 2, a supporting spring 39 is sleeved on the outer side of the telescopic rod 38, a roller 37 is rotatably connected to the lower portion of the telescopic rod 38 and used for supporting one end, far away from the crushing roller 1, of the main frame 2, and the supporting spring 39 can play a role in shock absorption.

Example two:

referring to fig. 7-8, the bottom of the first connecting rod 15 and the bottom of the second connecting rod 16 are both fixedly connected with the connecting bearing 21, the connecting bearing 21 is a fully sealed bearing, which can effectively prevent dust from entering into a bearing gap, ensure the operation flow of the connecting bearing 21, and increase the service life of the connecting bearing 21, the inside of the connecting bearing 21 is rotatably connected with the fixed feeding pipe 33, the feeding pipe 30 is rotatably connected to the outer wall of the fixed feeding pipe 33, the agent for soil remediation and improvement is input into the feeding pipe 30 through the fixed feeding pipe 33, one end of the feeding pipe 30 away from the fixed feeding pipe 33 is fixedly connected with the turntable 27, the other end of the fixed feeding pipe 33 is connected with the conveying motor 34, the conveying motor 34 is used for driving the feeding screw 32 inside the fixed feeding pipe 33 to rotate, the turntable 27 is internally provided with a hollow hole, the agent in the feeding pipe 30 can pass through the turntable 27 through the hole, a medicine dispersing pipe 28 is fixedly arranged on one side of the turntable 27 far away from the conveying pipe 30, the medicine enters the medicine dispersing pipe 28 after passing through the turntable 27 and is dispersed out of holes of the medicine dispersing pipe 28 under high pressure caused by continuous conveying of the medicine at the rear, the internal high pressure also prevents soil from flowing backwards and entering the medicine dispersing pipe 28, a connecting frame 31 is fixedly arranged inside the conveying pipe 30, a feeding screw rod 32 is rotatably connected inside the fixed feeding pipe 33, one end of the feeding screw rod 32 is fixedly connected to the side wall of the connecting frame 31, when the feeding screw rod 32 rotates, the conveying pipe 30 is driven to rotate together through the connecting frame 31, the conveying pipe 30 drives the turntable 27 and the medicine dispersing pipe 28 connected with the conveying pipe to rotate, the other end of the feeding screw rod 32 is connected to the output end of the conveying motor 34 and is driven to rotate through the conveying motor 34, a feeding hopper 35 is communicated above the fixed feeding pipe 33, and a bin is connected above the feeding hopper 35, the medicament in the feed bin passes through feed hopper 35 and carries to inside fixed inlet pipe 33, 34 fixed connection of conveying motor is at feed hopper 35 outer wall, 34 vibrations of conveying motor still can make the medicament in the feed hopper 35 drop more smoothly, the multiunit hole has been seted up to scattered pencil 28 outer wall, carousel 27 is close to one side fixedly connected with multiunit cutting block 29 of scattered pencil 28, carousel 27 is located cutting block 29 below position and has seted up the through-hole, when carousel 27 rotates, stir soil through carousel 27 and cutting block 29, and make partial soil pass through in the hole of cutting block 29 below, guaranteed that the medicament can obtain abundant mixing behind the soil of release, improve the range of scattering of medicament, increase the solidification coverage rate of medicament.

Example three:

referring to fig. 4-6, a mounting frame 26 is fixedly connected to a side wall of the main frame 2, the mounting frame 26 is of an L-shaped structure, a through shaft 25 is rotatably connected to a top of the mounting frame 26, a belt pulley 24 and a driving wheel 23 are fixedly connected to an outer wall of the through shaft 25, the belt pulley 24 is fixedly connected between two sets of driving wheels 23, the driving wheels 23 are distributed on two sides of the mounting frame 26, the belt pulley 24 is located inside the mounting frame 26, a first driving rod 18 and a second driving rod 19 are rotatably connected to two sides of the driving wheel 23 through a rotating shaft, connection points of the first driving rod 18 and the second driving rod 19 with the driving wheel 23 are located on the same diameter, a lifting driving motor 22 is fixedly connected to an upper surface of the main frame 2, the lifting driving motor 22 can drive the belt pulley 24 to rotate through a second connecting belt 20, one end of the first driving rod 18, which is far away from the driving wheel 23, is rotatably connected to a first driven wheel 14 through a rotating shaft, one end of the second driving rod 19, which is far away from the driving wheel 23, is rotatably connected with a second driven wheel 17 through a rotating shaft, the first driven wheel 14 is rotatably connected to the side wall of the main frame 2 through a rotating shaft, the second driven wheel 17 is rotatably connected to the outer wall of the sleeve ring 36 through a rotating shaft, when the driving wheel 23 rotates, the first driven wheel 14 is driven to rotate through the first driving rod 18, the second driven wheel 17 is driven to rotate through the second driving rod 19, so that the first driven wheel 14 and the second driven wheel 17 synchronously rotate, racks are respectively arranged on one side of the first connecting rod 15 and one side of the second connecting rod 16, the first driven wheel 14 is meshed and connected with the first connecting rod 15, the first driven wheel 14 can be driven to ascend or descend by rotating, the second driven wheel 17 is meshed and connected with the second connecting rod 16, the second driven wheel 17 can be driven to ascend or descend by rotating, the outer wall of the belt pulley 24 is wound with a second connecting belt 20, the second is connected the belt 20 top and is around connecting at lift driving motor 22 output, and the soil degree of depth of handling is carried out as required, drives drive wheel 23 through lift driving motor 22 and rotates, and rethread drive wheel 23 controls the height of head rod 15 and second connecting rod 16, and then the position of control carousel 27, realizes the regulation to the soil treatment degree of depth.

The working principle of the invention is as follows:

the device is placed in soil to be repaired and improved, a first driving motor 6 is started, the first driving motor 6 drives a driving gear 4 to rotate through a first connecting belt 5, the driving gear 4 drives a crushing roller 1 to rotate through a support frame 3, the crushing roller 1 rotates on the soil surface to realize integral walking of the device, when the crushing roller 1 walks, crushing teeth 11 extending out of the lower portion of the crushing roller 1 can crush the soil to facilitate subsequent medicament mixing, when the device integrally moves forward, rake teeth 12 are driven to scratch through the crushed soil to dig the soil, large stones in the soil are poked to two sides to avoid the rotary table 27 from contacting the stones to cause damage to cutting blocks 29, the conveying motor 34 is started, the rotary table 27 drives a feeding screw 32 to rotate through the conveying motor 34 at the rear portion when moving forward, the feeding screw 32 rotates to drive a conveying pipe 30 to rotate, and the rotary table 27 is driven to rotate when the conveying pipe 30 rotates, the soil is stirred by the cutting block 29 and is enabled to pass through holes on the surface of the rotary disc 27, meanwhile, when the feeding screw 32 rotates, the feeding screw 32 can continuously push the medicament in the fixed feeding pipe 33 forwards, the medicament passes through the conveying pipe 30 and the rotary disc 27 and enters the medicament dispersing pipe 28 and is released into the soil, at the moment, the soil depth to be treated is driven to rotate by the lifting driving motor 22 according to the soil depth required to be treated, the height of the first connecting rod 15 and the second connecting rod 16 is controlled by the driving wheel 23, and then the position of the rotary disc 27 is controlled, so that the soil treatment depth is adjusted, the medicament released into the soil and the heavy metal pollutants in the soil are subjected to physicochemical action, the metal pollutants which are easy to migrate and be easily absorbed by organisms are fixed into nontoxic or low toxic stable substances, and the migration and bioavailability of the pollutants are reduced, realizing the harmless treatment of the soil.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (8)

1. The device for repairing and improving the heavy metal contaminated soil comprises a crushing roller (1) and is characterized in that a central shaft (8) penetrates through the center of the crushing roller (1), the central shaft (8) is fixed at one end of a main frame (2), a cam (7) is fixedly connected to the outer wall of the central shaft (8), a support frame (3) is fixedly installed at one end of the crushing roller (1), a driving gear (4) is fixedly connected to the outer wall of the support frame (3), and the support frame (3) and the driving gear (4) are rotatably connected to the outer wall of the central shaft (8);

the crushing roller is characterized in that a plurality of groups of holes are formed in the crushing roller (1), the inner wall of the crushing roller (1) is fixedly connected with a reset spring (10) through a protrusion, the top of the reset spring (10) is fixedly connected with a concave plate (9), the lower surface of the concave plate (9) is fixedly connected with crushing teeth (11), the crushing teeth (11) penetrate through the holes in the crushing roller (1), the outer wall of the driving gear (4) is sleeved with a first connecting belt (5), the other end of the first connecting belt (5) is sleeved on an output shaft of a first driving motor (6), the first driving motor (6) is fixedly installed on the upper surface of a reinforcing rod (13), two ends of the reinforcing rod (13) are respectively abutted against two sides of a main frame (2), the lower surface of the reinforcing rod (13) is fixedly connected with a plurality of rake teeth (12), and two groups of lantern rings (36) are fixedly installed at the tail of the main frame (2), two sets of lantern ring (36) inside difference sliding connection has head rod (15) and second connecting rod (16), head rod (15) and the equal fixedly connected with connecting bearing (21) in second connecting rod (16) bottom, connecting bearing (21) internal rotation is connected with fixed inlet pipe (33), fixed inlet pipe (33) one end and conveying pipeline (30) swing joint, one end fixedly connected with carousel (27) of fixed inlet pipe (33) are kept away from in conveying pipeline (30), fixed inlet pipe (33) other end is connected with conveying motor (34).

2. The device for repairing and improving the soil polluted by the heavy metal according to claim 1, wherein a mounting frame (26) is fixedly connected to the side wall of the main frame (2), a penetrating shaft (25) is rotatably connected to the top of the mounting frame (26), a belt pulley (24) and a driving wheel (23) are fixedly connected to the outer wall of the penetrating shaft (25), the belt pulley (24) is fixedly connected between two groups of driving wheels (23), a first driving rod (18) and a second driving rod (19) are rotatably connected to the two sides of each driving wheel (23) through rotating shafts, a first driven wheel (14) is rotatably connected to one end, away from the driving wheels (23), of the first driving rod (18) through rotating shafts, a second driven wheel (17) is rotatably connected to one end, away from the driving wheels (23), of the second driving rod (19) through rotating shafts, the first driven wheel (14) is rotatably connected to the side wall of the main frame (2), the second is rotated through the pivot and is connected at lantern ring (36) outer wall from driving wheel (17), the rack has all been seted up to one side of head rod (15) and one side of second connecting rod (16), first driven wheel (14) are connected with head rod (15) meshing, the second is connected from driving wheel (17) and second connecting rod (16) meshing, belt pulley (24) outer wall has connect second connecting belt (20), second connecting belt (20) top is around connecing at lift driving motor (22) output.

3. The device for repairing and improving the soil polluted by the heavy metal according to claim 1, wherein the conveying pipe (30) is rotatably connected to the outer wall of a fixed feeding pipe (33), a hollow hole is formed in the inside of the rotary table (27), a medicine scattering pipe (28) is fixedly installed on one side, away from the conveying pipe (30), of the rotary table (27), a connecting frame (31) is fixedly installed in the conveying pipe (30), a feeding screw (32) is rotatably connected to the inside of the fixed feeding pipe (33), one end of the feeding screw (32) is fixedly connected to the side wall of the connecting frame (31), the other end of the feeding screw (32) is connected to the output end of a conveying motor (34), a feeding hopper (35) is communicated with the upper side of the fixed feeding pipe (33), and the conveying motor (34) is fixedly connected to the outer wall of the feeding hopper (35).

4. The device for remediating and improving heavy metal contaminated soil as recited in claim 1, wherein the protruding end of the cam (7) faces directly below, and the reinforcing rod (13) has a zigzag structure.

5. The heavy metal contaminated soil remediation and improvement device according to claim 2, wherein the connection points of the first driving rod (18) and the second driving rod (19) and the driving wheel (23) are located on the same diameter, and the lifting driving motor (22) is fixedly connected to the upper surface of the main frame (2).

6. The device for repairing and improving the soil polluted by the heavy metal according to claim 3, wherein a plurality of groups of holes are formed in the outer wall of the medicine dispersing pipe (28), a plurality of groups of cutting blocks (29) are fixedly connected to one side of the rotary table (27) close to the medicine dispersing pipe (28), and a through hole is formed in the position, below the cutting blocks (29), of the rotary table (27).

7. The device for repairing and improving the soil polluted by the heavy metal according to claim 1, wherein a telescopic rod (38) is fixedly connected below the main frame (2), a supporting spring (39) is sleeved outside the telescopic rod (38), and a roller (37) is rotatably connected below the telescopic rod (38).

8. The use method of the device for repairing and improving the soil polluted by the heavy metal according to claim 1, wherein the use method comprises the following steps:

the method comprises the following steps: the device is placed in soil to be restored and improved, a first driving motor (6) is started, the first driving motor (6) drives a driving gear (4) to rotate through a first connecting belt (5), the driving gear (4) drives a crushing roller (1) to rotate through a supporting frame (3), and the crushing roller (1) rotates on the surface of the soil to realize integral walking of the device;

step two: when the crushing roller (1) rotates, the concave plate (9), the return spring (10) and the crushing teeth (11) in the crushing roller (1) pass through the bulge part below the cam (7) one by one, so that the cam (7) ejects the crushing teeth (11) passing through the bulge part out to be inserted into soil, the dried and caked soil is crushed, and subsequent reagents are convenient to mix;

step three: when the crushing roller (1) rotates, the rake teeth (12) are driven to pass through crushed soil to dig up the soil, large stones in the soil are pushed to two sides, the rotary table (27) is prevented from contacting the stones, the cutting block (29) is prevented from being damaged, meanwhile, the driving wheel (23) is driven to rotate through the lifting driving motor (22) according to the soil depth to be processed, the heights of the first connecting rod (15) and the second connecting rod (16) are controlled through the driving wheel (23), the position of the rotary table (27) is further controlled, and the soil processing depth is adjusted;

step four: the crushing roller (1) can drive the rotary table (27) to advance in soil simultaneously when rotating, the rotary table (27) drives the feeding screw (32) to rotate through the rear conveying motor (34) when advancing, the feeding screw (32) drives the conveying pipe (30) to rotate, the conveying pipe (30) drives the rotary table (27) to rotate again when rotating, soil is stirred through the cutting block (29) and made to pass through holes in the surface of the rotary table (27), meanwhile, when the feeding screw (32) rotates, the feeding screw (32) can continuously push the medicament in the fixed feeding pipe (33) forwards, and the medicament passes through the conveying pipe (30) and the rotary table (27), enters the medicament dispersing pipe (28) and is released into the soil;

step five: the agent released into the soil and the heavy metal pollutants in the soil have physicochemical action, and the metal pollutants which are easy to migrate and be easily absorbed by organisms are fixed into nontoxic or low-toxicity stable substances, so that the migration and bioavailability of the pollutants are reduced, and the harmless treatment of the soil is realized.

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