In-situ four-stage crushing soil remediation device

Abstract

The novel in-situ four-stage crushing soil remediation device comprises a vehicle head, a vehicle frame, a first-stage chain plate type turning and throwing device, a pesticide spraying device, a second-stage coarse crushing device, a third-stage fine crushing spiral mixing device and a fourth-stage spiral mixing device, the vehicle frame is fixedly connected to the rear side of the vehicle head, the first-stage chain plate type turning and throwing device is arranged directly below the vehicle frame, the front end of the first-stage chain plate type turning and throwing device is hingedly connected to the front side of the vehicle frame, the pesticide spraying device is installed on the front side of the vehicle frame, and the second-stage coarse crushing device, the third-stage fine crushing spiral mixing device and the fourth-stage spiral mixing device are vertically installed on the rear side of the vehicle frame from front to back. The four-stage crushing design of the chain plate type turning and throwing, coarse crushing, fine crushing spiral mixing and spiral mixing integrated type is adopted, the soil can be effectively layer-by-layer scanned and crushed, the crushing, pesticide spraying and mixing are integrated, the soil crushing rate is effectively improved, the soil and pesticide mixing property is enhanced, the automation degree is improved, and the heavy metal passivation efficiency of the soil is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soil remediation, in particular to an in-situ four-stage broken soil remediation device. BACKGROUND

[0002] The current various ordinary in-situ soil broken remediation devices mainly change the soil particle size and increase the combination degree with the reagent through the forms of strong cutting and roller pressing. In the current equipment for remediation of heavy metal contaminated soil, the typical ordinary in-situ soil broken remediation device is a rotary cultivator that is used in agricultural production. When the soil is broken, the rotary cultivator has high field leveling efficiency and strong soil breaking and crushing capacity, and the ground is flat after the cultivation, which is also beneficial to the uniform mixing of the reagent with the soil after the subsequent reagent spraying, and can effectively improve the soil remediation capacity. However, it should be noted that when the soil in the middle layer (with a depth of about 1 meter) is remediated, the soil has large viscosity, the soil breaking degree is reduced when the rotary cultivator works, the soil particle size is slightly large, and after the reagent is sprayed, the reagent may only adhere to the surface of the blocky soil, and the soil remediation effect is not good.

[0003] At present, in the soil remediation process, the soil plowing and breaking, reagent spraying and mixed reagent mixing are separated, the mixed reagent quality is poor, the operation machine can only realize the plowing and breaking operation, the function is single, the operation efficiency is low, the soil breaking, reagent spraying and soil reagent mixing cannot be realized in one whole, if all the functions are realized, more devices are needed, the structure is complex, the control is complicated, the breaking rate is low, the mixing is not strong, the automation degree is low, and the like, which cannot meet the current soil remediation environment demand. This will be not conducive to the scaling and high quality of the in-situ soil broken remediation device, and will affect the efficiency of the heavy metal soil remediation.

[0004] The above technical problems have become problems that need to be solved by the person skilled in the art. SUMMARY

[0005] The purpose of the present application is to provide an in-situ four-stage broken soil remediation device. The present application adopts a chain plate type turning and throwing breaking, coarse breaking, fine breaking spiral mixing and spiral mixing integrated four-stage breaking design, can effectively scan and break the soil layer by layer, and integrates the breaking, reagent spraying and mixing, so that the soil breaking rate is effectively improved, the soil reagent mixing is enhanced, the automation degree is improved, and the heavy metal passivation efficiency of the soil is effectively improved.

[0006] To achieve the above purpose, the present application adopts the following technical scheme:

[0007] The in-situ four-stage crushing soil remediation device comprises a vehicle head, a vehicle frame, a first-stage chain plate type turning and throwing device, a pesticide spraying device, a second-stage coarse crushing device, a third-stage fine crushing spiral uniform mixing device and a fourth-stage spiral uniform mixing device, the vehicle frame is horizontally fixedly connected to the rear side of the vehicle head in the front-rear direction, the first-stage chain plate type turning and throwing device is arranged directly below the vehicle frame in the front-rear direction, the front end of the first-stage chain plate type turning and throwing device is hingedly connected to the front side of the vehicle frame, the rear side of the vehicle head is provided with a folding mechanism for driving the first-stage chain plate type turning and throwing device to turn up and down, the pesticide spraying device is installed on the front side of the vehicle frame, the spraying part of the pesticide spraying device is arranged on the lower part of the front side of the vehicle frame and above the front side of the first-stage chain plate type turning and throwing device, the spraying part of the pesticide spraying device sprays downward, the second-stage coarse crushing device, the third-stage fine crushing spiral uniform mixing device and the fourth-stage spiral uniform mixing device are vertically arranged in sequence from front to back on the rear side of the vehicle frame and behind the first-stage chain plate type turning and throwing device, the vehicle head is provided with a power system and a control system, the power system provides power to the first-stage chain plate type turning and throwing device, the pesticide spraying device, the second-stage coarse crushing device, the third-stage fine crushing spiral uniform mixing device, the fourth-stage spiral uniform mixing device and the folding mechanism respectively, and the control system is signal connected with the first-stage chain plate type turning and throwing device, the pesticide spraying device, the second-stage coarse crushing device, the third-stage fine crushing spiral uniform mixing device, the fourth-stage spiral uniform mixing device and the folding mechanism respectively.

[0008] The vehicle head adopts a tractor main body, the vehicle frame is a long rectangular cover plate structure with an open bottom, the front side plate of the vehicle frame has a larger up-down size than the other three side plates, a plurality of bolt seats are fixed on the front side of the front side plate of the vehicle frame, and each bolt seat is fixedly connected with the rear side of the frame of the vehicle head through a bolt;

[0009] The power system comprises an engine, a generator and a small hydraulic station, the engine provides power to the generator, the generator provides power supply to the small hydraulic station, the first-stage chain plate type turning and throwing device, the pesticide spraying device, the second-stage coarse crushing device, the third-stage fine crushing spiral uniform mixing device and the fourth-stage spiral uniform mixing device, and the small hydraulic station provides hydraulic power to the folding mechanism, the second-stage coarse crushing device, the third-stage fine crushing spiral uniform mixing device and the fourth-stage spiral uniform mixing device.

[0010] The primary chain plate type turning over device comprises a turning over frame, a chain plate type conveyor and a turning over baffle, the turning over frame is a rectangular frame, the turning over frame is vertically arranged below the front side of the vehicle frame and the center line thereof is horizontally arranged along the front-back direction, the lower side frame of the turning over frame is higher than the ground, the upper side of the middle part of the left side frame and the upper side of the middle part of the right side frame of the turning over frame are integrally formed with a lifting beam extending horizontally forward, the front ends of the two lifting beams are respectively hinged to the left and right sides of the lower rear side edge of the front side plate of the vehicle frame and the hinge shafts thereof are horizontally arranged along the left-right direction, the chain plate type conveyor is horizontally arranged along the front-back direction, the front side of the chain plate type conveyor passes through the turning over frame with the center forward, the left and right sides of the frame of the chain plate type conveyor are fixedly connected with the turning over frame, the rear lower part of the left lifting beam is fixedly installed with a turning over reduction motor for providing power to the chain plate type conveyor and located at the left front side of the frame of the chain plate type conveyor, the moving direction of the chain plate conveyor belt of the chain plate type conveyor is clockwise when viewed from the left side thereof, the upper half of the chain plate conveyor belt of the chain plate type conveyor moves from front to back, the lower half of the chain plate conveyor belt of the chain plate type conveyor moves from back to front, the turning over baffle is horizontally arranged above the chain plate type conveyor along the front-back direction, the front side edge of the turning over baffle is integrally and fixedly connected with the upper side frame of the turning over frame, the rear side edge of the turning over baffle is integrally formed with a circular arc plate covering the upper part of the rear end of the chain plate type conveyor, a plurality of turning over cutter groups are fixedly installed on the outer surface of each chain plate of the chain plate type conveyor and arranged at intervals left and right, each turning over cutter group on the adjacent two chain plates is arranged staggered from front to back, the generator provides power to the turning over reduction motor, and the control system is signal connected with the turning over reduction motor.

[0011] A turning over cutter group on a certain chain plate of the upper half of the chain plate conveyor belt of the chain plate type conveyor comprises a cutter seat and a turning over cutter, the cutter seat is fixedly installed on the outer surface of the corresponding chain plate by a plurality of fastening bolts, the turning over cutter is in a semi-circular table cylinder structure along the front-back direction and large in front and small in back, the axis of the turning over cutter is arranged inclined with the front high and the rear low, the turning over cutter is permeable from front to back and the open side thereof is arranged rightward, the lower side edge of the turning over cutter is fixedly connected with the middle part of the upper side of the cutter seat, the upper side edge of the turning over cutter is provided with a cutter edge in a 30° inclined surface, and the front end outer circle of the turning over cutter is provided with a semi-circular table surface structure thin in front and thick in back.

[0012] The folding and unfolding mechanism comprises two hydraulic rods, the two hydraulic rods are respectively arranged above the two lifting beams in left-right symmetry, two left-right spaced long holes are vertically arranged on the front side plate of the vehicle frame, the two long holes are respectively corresponding to the front and back of the two lifting beams, the two hydraulic rods are respectively corresponding to pass through the two long holes and are arranged inclined with the front high and the rear low, the two ends of the left hydraulic rod are respectively hinged to the left rear side of the frame of the vehicle head and the upper side of the rear end of the left lifting beam, the two ends of the right hydraulic rod are respectively hinged to the right rear side of the frame of the vehicle head and the upper side of the rear end of the right lifting beam, a small hydraulic station provides hydraulic power to the two hydraulic rods, and the control system is signal connected with the two hydraulic rods.

[0013] The medicament spraying device comprises a spraying box, a storage box and a medicament pump, the spraying box, the storage box and the medicament pump are fixedly arranged on the front side of the upper side of the vehicle frame in sequence, the top of the storage box is provided with a medicament adding cover, the medicine inlet of the spraying box is connected with the outlet of the medicament pump through a medicament conveying pipeline, the medicine outlet of the storage box is connected with the inlet of the medicament pump through a medicament suction pipeline, the bottom of the spraying box is fixedly connected with a plurality of spraying pipes arranged at intervals left and right, each spraying pipe vertically penetrates the upper side plate of the vehicle frame and is located above the front side of the chain plate conveyor, the lower end of each spraying pipe is provided with an electromagnetic valve nozzle for downward spraying, the generator provides power for the medicament pump, and the control system is signal connected with the medicament pump and each electromagnetic valve nozzle respectively.

[0014] The secondary coarse crushing device comprises a first guide frame, a first guide sliding seat, a crushing reduction motor, a coarse crushing drill bit, a first door frame support and a first hydraulic oil cylinder, the first guide frame is a cuboid frame, the first guide frame is fixedly installed on the lower side of the rear side of the upper side plate of the vehicle frame and located on the rear side of the chain plate conveyor, the bottom of the first guide frame is higher than the ground, four first vertical guide rods are fixedly arranged on the first guide frame, the four first vertical guide rods are arranged in a rectangular array, the first guide sliding seat is a square seat with a central hole, the four side surfaces of the first guide sliding seat are all concave arc surfaces toward the center, the first guide sliding seat is horizontally arranged in the first guide frame, four first guide holes are formed in the four corners of the first guide sliding seat, the four first vertical guide rods pass through the four first guide holes respectively, the first guide sliding seat is slidably connected to the four first vertical guide rods, a first square hole corresponding to the first guide sliding seat is formed in the rear side of the upper side plate of the vehicle frame, the crushing reduction motor is vertically arranged above the first guide sliding seat and can pass through the first square hole, the coarse crushing drill bit is vertically arranged in the middle of the four first vertical guide rods, the upper end of the coarse crushing drill bit is rotatably installed in the central hole of the first guide sliding seat, the left side, the right side and the lower side of the first door frame support are all open, the first door frame support is fixedly installed on the rear side of the upper side plate of the vehicle frame, the first door frame support spans the first square hole and covers the crushing reduction motor, the first hydraulic oil cylinder is vertically arranged in the first door frame support and located above the crushing reduction motor, the piston rod of the first hydraulic oil cylinder extends downward, the cylinder body of the first hydraulic oil cylinder is fixedly connected to the middle of the lower side of the upper side plate of the first door frame support, the lower end of the piston rod of the first hydraulic oil cylinder is fixedly connected to the top of the shell of the crushing reduction motor through a first flange, in the initial state, the piston rod of the first hydraulic oil cylinder is completely retracted, the first guide sliding seat is located at the uppermost part of the four first vertical guide rods, the lower end of the coarse crushing drill bit is higher than the ground, the generator provides power for the crushing reduction motor, and the small hydraulic station provides hydraulic power for the first hydraulic oil cylinder, and the control system is signal connected with the crushing reduction motor and the first hydraulic oil cylinder respectively.

[0015] The rough breaking drill bit comprises a first drill shaft and a first positioning drill tip, the first drill shaft is vertically arranged, the upper end of the first drill shaft is coaxially arranged through the center hole of a first guide sliding seat and is coaxially and drivingly connected with the lower end of the power shaft of a breaking reduction motor through a first shaft coupling, the first bearing is fixedly embedded in the center hole of the first guide sliding seat and is sleeved on the first drill shaft, the first drill shaft is rotatably connected in the center hole of the first guide sliding seat through the first bearing, the first positioning drill tip is a conical positioning tip with a large upper end and a small lower end, the first positioning drill tip is fixedly installed on the lower end of the first drill shaft, a plurality of rake rods are fixedly installed on the outer circumference of the lower end of the first drill shaft and are arranged in a circumferential array and radially, the lower side of the rake rod is provided with a first breaking tooth, the first breaking tooth is arranged obliquely downward, the first drill shaft is divided into a plurality of combined breaking sections from bottom to top, the outer circumference of each combined breaking section is fixedly installed with a combined breaking piece, the combined breaking piece comprises a breaking knife, a rotary tillage curved knife and a first sawtooth knife which are arranged at intervals from bottom to top, the breaking knife, the rotary tillage curved knife and the first sawtooth knife are both radially and symmetrically arranged with a pair on the outer circumference of the first drill shaft, and the installation angles of the breaking knife, the rotary tillage curved knife and the first sawtooth knife are staggered by 90° in sequence.

[0016] The tertiary fine crushing spiral uniform mixing device comprises a second guide frame, a second guide sliding base, a first uniform mixing speed reducer, a three-section fine crushing spiral uniform mixing drill bit, a second door frame type support and a second hydraulic oil cylinder. The second guide frame is a cuboid frame, is fixedly installed at the lower side of the rear side of the upper side plate of the vehicle frame and located at the rear side of the first guide frame, and the bottom of the second guide frame is higher than the ground. Four second vertical guide rods are fixedly arranged on the second guide frame in a rectangular array. The second guide sliding base has the same structure as the first guide sliding base and is horizontally arranged in the center of the second guide frame. Second guide holes are formed in the four corners of the second guide sliding base in a penetrating manner. The four second vertical guide rods pass through the four second guide holes respectively. The second guide sliding base is slidably connected to the four second vertical guide rods. A second square hole corresponding to the second guide sliding base is formed in the rear side of the upper side plate of the vehicle frame. The first uniform mixing speed reducer is vertically arranged above the second guide sliding base and can pass through the second square hole. The three-section fine crushing spiral uniform mixing drill bit is vertically arranged in the middle of the four second vertical guide rods. The upper end of the three-section fine crushing spiral uniform mixing drill bit coaxially passes through the center hole of the second guide sliding base and is coaxially and drivingly connected to the lower end of the power shaft of the first uniform mixing speed reducer. The upper end of the three-section fine crushing spiral uniform mixing drill bit is rotatably installed in the center hole of the second guide sliding base. The left side, the right side and the lower side of the second door frame type support are open. The second door frame type support is fixedly installed on the rear side of the upper side plate of the vehicle frame and covers the first uniform mixing speed reducer. The second hydraulic oil cylinder is vertically arranged in the second door frame type support and located above the first uniform mixing speed reducer. The piston rod of the second hydraulic oil cylinder extends downward. The upper end of the cylinder body of the second hydraulic oil cylinder is fixedly connected to the middle part of the lower side of the upper side plate of the second door frame type support. The lower end of the piston rod of the second hydraulic oil cylinder is fixedly connected to the top of the shell of the first uniform mixing speed reducer through a second flange. In the initial state, the piston rod of the second hydraulic oil cylinder is completely retracted, the second guide sliding base is located at the uppermost part of the four second vertical guide rods, and the lower end of the three-section fine crushing spiral uniform mixing drill bit is higher than the ground. A generator provides power to the first uniform mixing speed reducer, a small hydraulic station provides hydraulic power to the second hydraulic oil cylinder, and a control system is signal connected to the first uniform mixing speed reducer and the second hydraulic oil cylinder respectively.

[0017] The three-section fine crushing spiral uniform mixing drill bit comprises a second drill shaft and a second positioning drill tip, the second drill shaft is vertically arranged, the upper end of the second drill shaft is coaxially arranged through the center hole of a second guide sliding seat and is coaxially and drivingly connected with the lower end of the power shaft of a first uniform mixing speed reducer motor through a second coupling, a second bearing is fixedly embedded in the center hole of the second guide sliding seat and is sleeved on the second drill shaft, the second drill shaft is rotatably connected in the center hole of the second guide sliding seat through the second bearing, the second positioning drill tip is a tapered positioning tip with a large upper end and a small lower end, and the second positioning drill tip is fixedly installed on the lower end of the second drill shaft; the second drill shaft is divided into three sections from bottom to top, and the first section of the second drill shaft is provided with a plurality of first crushing spiral blades arranged in a circumferential array and spirally arranged along the axial direction on the outer circumference of the first section, the lower end edge and the upper end edge of each first crushing spiral blade are fixedly provided with second crushing teeth on the outer side, and the second crushing teeth are arranged obliquely downward; the outer circumference of the second section of the second drill shaft is uniformly provided with a plurality of first transition spiral blades arranged in a circumferential array and spirally distributed along the axial direction, and each first transition spiral blade is fixedly provided with a second sawtooth cutter at the lower end edge; the outer circumference of the third section of the second drill shaft is spirally arranged with first uniform mixing spiral blades along the axial direction.

[0018] The circumferential diameter of the outer circle of the first transition spiral blade is greater than the circumferential diameter of the outer circle of the first crushing spiral blade, which is greater than the circumferential diameter of the outer circle of the first uniform mixing spiral blade, and the spiral directions of the first crushing spiral blade, the first uniform mixing spiral blade and the first transition spiral blade are the same.

[0019] The fourth-stage screw uniform mixing device comprises a third guide frame, a third guide sliding base, a second uniform mixing reduction motor, a two-section screw uniform mixing drill bit, a third door frame type support and a third hydraulic oil cylinder. The third guide frame is a cuboid frame, is fixedly installed at the lower side of the rear side of the upper side plate of the vehicle frame and located at the rear side of the second guide frame, and the bottom of the third guide frame is higher than the ground. Four third vertical guide rods are fixedly arranged on the third guide frame in a rectangular array. The third guide sliding base has the same structure as the second guide sliding base and is horizontally arranged at the center of the third guide frame. Third guide holes are formed in the four corners of the third guide sliding base. The four third vertical guide rods pass through the four third guide holes respectively. The third guide sliding base is slidably connected to the four third vertical guide rods. A third hole is formed in the rear side of the upper side plate of the vehicle frame corresponding to the third guide sliding base. The second uniform mixing reduction motor is vertically arranged above the third guide sliding base and can pass through the third hole. The two-section screw uniform mixing drill bit is vertically arranged in the middle of the four third vertical guide rods. The upper end of the two-section screw uniform mixing drill bit passes through the center hole of the third guide sliding base and is coaxially connected to the lower end of the power shaft of the second uniform mixing reduction motor. The upper end of the two-section screw uniform mixing drill bit is rotatably installed in the center hole of the third guide sliding base. The left side, right side and lower side of the third door frame type support are open. The third door frame type support is fixedly installed on the rear side of the upper side plate of the vehicle frame and covers the second uniform mixing reduction motor. The third hydraulic oil cylinder is vertically arranged in the third door frame type support and located above the second uniform mixing reduction motor. The piston rod of the third hydraulic oil cylinder extends downward. The upper end of the cylinder body of the third hydraulic oil cylinder is fixedly connected to the middle of the lower side of the third door frame type support. The lower end of the piston rod of the third hydraulic oil cylinder is fixedly connected to the top of the shell of the second uniform mixing reduction motor through a third flange. In the initial state, the piston rod of the third hydraulic oil cylinder is fully retracted, the third guide sliding base is located at the uppermost part of the four third vertical guide rods, and the lower end of the two-section screw uniform mixing drill bit is higher than the ground. The generator provides power to the second uniform mixing reduction motor, and the small hydraulic station provides hydraulic power to the third hydraulic oil cylinder. The control system is signal connected to the second uniform mixing reduction motor and the third hydraulic oil cylinder respectively.

[0020] The two-section spiral uniform mixing drill bit comprises a third drill shaft and a third positioning drill tip, the third drill shaft is vertically arranged, the upper end of the third drill shaft is coaxially arranged through the center hole of the third guide sliding seat and is coaxially and drivingly connected with the lower end of the power shaft of the second uniform mixing reduction motor through the third coupling, the third bearing is fixedly embedded in the center hole of the third guide sliding seat and is sleeved on the third drill shaft, the third drill shaft is rotatably connected in the center hole of the third guide sliding seat through the third bearing, the third positioning drill tip is a conical positioning tip with a large upper end and a small lower end, and the third positioning drill tip is fixedly installed on the lower end of the third drill shaft; the third drill shaft is divided into two sections from bottom to top, and the second crushing spiral blades are arranged on the outer circumference of the first section of the third drill shaft in a circular array and in an axial spiral manner, the lower end edge and the upper end edge of each second crushing spiral blade are fixedly provided with third crushing teeth on the outer side, and the third crushing teeth are arranged obliquely downward; the second transition spiral blades and the second uniform mixing spiral blades are arranged on the outer circumference of the second section of the third drill shaft in an axial spiral manner from bottom to top, the upper end of the second transition spiral blade is fixedly connected with the lower end of the second uniform mixing spiral blade in an integral manner, the length of the second section of the third drill shaft is greater than that of the first section, and the axial length of the second uniform mixing spiral blade is greater than that of the second transition spiral blade.

[0021] The diameter of the circle where the outer circle of the second transition spiral blade is located is greater than that of the second crushing spiral blade, and the diameter of the circle where the outer circle of the second uniform mixing spiral blade is located is greater than that of the second transition spiral blade, the spiral directions of the second crushing spiral blade, the second uniform mixing spiral blade and the second transition spiral blade are the same.

[0022] Compared with the prior art, the present invention has outstanding substantial features and significant progress. Specifically, the working principle of the present invention is: initially, the piston rods of the hydraulic rod, the first hydraulic cylinder, the second hydraulic cylinder and the third hydraulic cylinder are all in a retracted state, then the two lifting beams are in a horizontal state, the chain plate conveyor is above the ground and is in a horizontal retracted state, and the first guide slide is located at the uppermost part of the four first vertical guide rods. Similarly, the second guide slide is located at the uppermost part of the four second vertical guide rods, and the third guide slide is located at the uppermost part of the four third vertical guide rods, then the first positioning drill tip, the second positioning drill tip and the third positioning drill tip are all above the ground and in a retracted state; the staff opens the dosing cover and puts the prepared soil The soil remediation agent is added to the storage box. After adding the agent, the dosing cover is closed. The staff sits on the front of the vehicle and drives the in-situ four-stage crushing soil remediation device to the soil area to be remediated. Then, the staff controls the flipping reduction motor and the agent pump to start through the control system, and opens the nozzles of each solenoid valve at the same time. Then, the flipping reduction motor drives the chain conveyor belt of the chain conveyor to start moving. Then, the control system controls the piston rods of the two hydraulic rods to extend synchronously. The two hydraulic rods push the two lifting beams to tilt down a certain angle. The two lifting beams drive the chain conveyor downward through the flipping frame, so that the chain conveyor is tilted with the front higher and the back lower, and the rear side of the chain conveyor is pressed down into the soil. When the chains of the chain conveyor drive the turning knives thereon to rotate continuously, each turning knife cuts the soil to form a groove here, and the cut and stripped soil is continuously transported forward and upward along the lower half of the chain conveyor belt of the chain conveyor. The cut and stripped soil moves to the upper half of the chain conveyor belt of the chain conveyor and then is continuously transported backward and downward to the rear of the groove along the upper half of the chain conveyor belt of the chain conveyor. The turning baffle can prevent the soil from being thrown upward and falling into other areas during turning. After a period of time, the soil turning and the first crushing can be achieved here. During the soil turning process, the chemical pump continuously sucks the chemical in the chemical storage box through the chemical suction pipe, and the chemical pump then pumps the chemical into the chemical storage box in a A certain pressure is continuously pumped into the spray box through the agent delivery pipeline, and then the agent in the spray box is sprayed downwards through the solenoid valve nozzle at the lower end of each spray pipe, and the cut and stripped soil particles are transported to the upper front part of the chain conveyor along the lower half of the chain conveyor belt of the chain conveyor, where they are just sprayed with the agent, thus achieving a preliminary mixing of the soil and the agent; then, the head of the vehicle drives the entire device to move forward slowly for a certain distance and stop, so that the secondary coarse crushing device moves forward to the top of the soil that has been turned over in the initial working area of ​​the primary chain flipping device, wherein the primary chain flipping device can continue to cut and crush the soil that passes by as the head of the vehicle moves forward, and at the same time achieve a preliminary mixing of the cut and stripped soil and the agent;Then, the crushing reduction motor is started, the crushing reduction motor drives the rough crushing drill bit to rotate and reach the working speed, and then the first hydraulic oil cylinder is controlled to act through the control system, the piston rod of the first hydraulic oil cylinder slowly extends downward, the piston rod of the hydraulic oil cylinder pushes the crushing reduction motor to move downward, then the rough crushing drill bit slowly moves downward, and the first guide sliding seat slides downward along the four first vertical guide rods. During the downward movement of the rough crushing drill bit: when the first positioning drill tip starts to move downward to contact the soil, the first positioning drill tip will slowly damage the soil at the center position and around the soil, realizing the second crushing of the soil. Then, the first drill shaft continues to move downward until the first positioning drill tip is completely drilled into the soil, the first crushing tooth will contact the soil and crush the soil for the third time, the first drill shaft continues to move downward until each section of the combined crushing section is completely drilled into the soil, then the crushing knives, rotary tillage curved knives and first sawtooth knives on the outer circumference of each section of the combined crushing section can cut the soil in an interleaved scanning manner, realizing the fourth crushing of the soil, and further crushing the large block of soil into small pieces of soil, so that the soil and the pesticide are more fully contacted; when the rough crushing drill bit reaches the target depth (about 1 meter), the first hydraulic oil cylinder stops acting, the crushing reduction motor keeps working, and the first drill shaft keeps rotating, the first drill shaft drives each crushing knife, rotary tillage curved knife and first sawtooth knife to rotate in the turned soil to realize the rough crushing of the large block of soil.

[0023] Then, the staff drives the vehicle head to make the whole device move forward again slowly for a certain distance and stop, so that the three-stage fine crushing spiral uniform mixing device reaches the working area of the second-stage coarse crushing device above the soil which has been coarsely crushed, wherein the second-stage coarse crushing device can continue to cut and coarsely crush the soil which has been moved through and turned over, so that the soil which has been coarsely crushed can be more fully contacted with the agent; then the first uniform mixing reduction motor is started, the first uniform mixing reduction motor drives the three-stage fine crushing spiral uniform mixing drill bit to rotate forward and reach the working speed, and then the second hydraulic oil cylinder is controlled to move downward by the control system, so that the piston rod of the second hydraulic oil cylinder slowly extends downward, the piston rod of the second hydraulic oil cylinder pushes the first uniform mixing reduction motor to move downward, and then the three-stage fine crushing spiral uniform mixing drill bit slowly moves downward, and the second guide sliding seat slides downward along the four second vertical guide rods; when the second positioning drill tip starts to move downward to contact the soil, the second positioning drill tip slowly damages the soil at the central position and around the central position, so that the soil is crushed for the fifth time; then the second drill shaft continues to move downward until the second positioning drill tip is completely drilled into the soil, when the lower end edge of the first crushing spiral blade contacts the soil, the second crushing teeth on the lower side crush the soil for the sixth time, when the upper end edge of the first crushing spiral blade contacts the soil, the first section of the second drill shaft is completely drilled into the soil, and the second crushing teeth on the upper side crush the soil for the seventh time, meanwhile, each first crushing spiral blade can transport the soil around the first section of the second drill shaft upward, so that the lower layer of soil moves upward to mix with the upper layer of soil, and the soil around the first section of the second drill shaft is extruded and stirred, so that the soil and the agent are uniformly mixed for the second time; then the second drill shaft continues to move downward under the action of the first uniform mixing reduction motor, the second section of the second drill shaft starts to drill into the soil, each first transition spiral blade moves downward with the second drill shaft and drills into the soil, the second sawtooth knife at the lower end edge of each first transition spiral blade crushes the soil for the eighth time, meanwhile, each first transition spiral blade can transport the soil around the second section of the second drill shaft upward, so that the lower layer of soil moves upward to mix with the upper layer of soil, and the soil around the second section of the second drill shaft is extruded and stirred, so that the soil and the agent are uniformly mixed for the third time; the second drill shaft continues to move downward, the second section of the second drill shaft is completely drilled into the soil, the third section of the second drill shaft starts to drill into the soil, and the first uniform mixing spiral blade fully stirs and mixes the soil and the agent, so that the soil and the agent are uniformly mixed for the fourth time; when the three-stage fine crushing spiral uniform mixing drill bit reaches the target depth (about 1 meter), the second hydraulic oil cylinder stops moving, the first uniform mixing reduction motor keeps rotating forward for a period of time and then reverses for a period of time, the first uniform mixing reduction motor changes the rotation direction intermittently according to requirements, so that the soil and the agent are fully mixed until the soil particles are finely crushed and uniformly mixed with the agent, and then the piston rod of the second hydraulic oil cylinder is controlled to retract upward, so that the first uniform mixing reduction motor and the three-stage fine crushing spiral uniform mixing drill bit are pulled out upward from the soil;

[0024] The operator drives the vehicle head to move the whole device forward again for a certain distance and stops, so that the tertiary fine crushing and uniform mixing device reaches the upper of the soil which has been coarsely crushed in the next working area of the secondary coarse crushing device. The operation of the tertiary fine crushing and uniform mixing device is repeated to finely crush and uniformly mix the soil in this area to the required standard. At the same time, the quaternary uniform mixing device reaches the upper of the soil which has been finely crushed and uniformly mixed with the agent in the working area of the tertiary fine crushing and uniform mixing device. Then the second uniform mixing reduction motor is started. After the second uniform mixing reduction motor drives the two-section spiral uniform mixing drill head to rotate and reach the working speed, the third hydraulic cylinder is controlled to move downward slowly by the control system, so that the piston rod of the third hydraulic cylinder pushes the second uniform mixing reduction motor to move downward, and then the two-section spiral uniform mixing drill head moves downward slowly, and the third guide slide moves downward along the four third vertical guide rods. When the third positioning drill tip starts to move downward to contact the soil, the third positioning drill tip slowly destroys the soil at the center and around the soil, achieving the ninth crushing of the soil. Then the third drill shaft continues to move downward until the third positioning drill tip is completely drilled into the soil. When the lower end edge of the second crushing spiral blade contacts the soil, the lower third crushing teeth crush the soil for the tenth time. When the third drill shaft continues to move downward until the upper end edge of the second crushing spiral blade contacts the soil, the first section of the third drill shaft is completely drilled into the soil, and the upper third crushing teeth crush the soil for the eleventh time. At the same time, the second crushing spiral blades can transport the soil around the first section of the third drill shaft upward, so that the lower layer of soil moves upward to mix with the upper layer of soil, and the surrounding soil is extruded and stirred, so that the soil and the agent are uniformly mixed for the fifth time. Then the third drill shaft continues to move downward under the action of the second uniform mixing reduction motor. The second transition spiral blade moves downward with the second drill shaft and is drilled into the soil. The second transition spiral blade can transport the soil around the second section of the third drill shaft upward, so that the lower layer of soil moves upward to mix with the upper layer of soil, and the surrounding soil is extruded and stirred, so that the soil and the agent are uniformly mixed for the sixth time. The third drill shaft continues to move downward, and the second transition spiral blade is completely drilled into the soil. The second uniform mixing spiral blade starts to drill into the soil, and the second uniform mixing spiral blade stirs and uniformly mixes the soil and the agent, achieving the seventh uniform mixing of the soil and the agent. When the two-section spiral uniform mixing drill head reaches the target depth (about 1 meter), the third hydraulic cylinder stops moving, the second uniform mixing reduction motor keeps rotating for a period of time and then reverses for a period of time. According to the requirements, the second uniform mixing reduction motor changes the direction intermittently, so that the soil and the agent are fully mixed until the soil particles and the agent are uniformly mixed to the required standard. Then the piston rod of the third hydraulic cylinder is controlled to retract upward, and the second uniform mixing reduction motor and the two-section spiral uniform mixing drill head are pulled out of the soil. The tertiary fine crushing and uniform mixing device and the quaternary uniform mixing device are synchronized.

[0025] Afterwards, the staff drives the car head to make the whole device move forward again to stop for a certain distance, so that the three-stage fine crushing spiral mixing device reaches the next working area of the second-stage coarse crushing device above the coarsely crushed soil, the four-stage spiral mixing device reaches the next working area of the three-stage fine crushing spiral mixing device above the finely crushed and uniformly mixed soil with the pesticide, and the above-mentioned operation of the three-stage fine crushing spiral mixing device and the four-stage spiral mixing device is repeated, so that the soil in the corresponding area is fully crushed and uniformly mixed with the pesticide to meet the requirements, and then according to the above working principle, all the soil to be repaired is turned over, coarsely crushed, finely crushed, and uniformly mixed with the pesticide to complete the established soil repair depth operation target; finally, the piston rods of the two hydraulic rods are synchronously contracted to the initial state, the first chain plate type turning device is folded up to the initial state, the crushing reduction motor, the first mixing reduction motor and the second mixing reduction motor are turned off, the piston rods of the first hydraulic cylinder, the second hydraulic cylinder and the third hydraulic cylinder are all contracted upward to the initial state, the crushing reduction motor, the coarse crushing drill bit, the first mixing reduction motor, the three-stage fine crushing spiral mixing drill bit, the second mixing reduction motor and the two-stage spiral mixing drill bit are all lifted to the initial state, and the turning reduction motor, the pesticide pump and each electromagnetic valve nozzle are turned off.

[0026] The turning blades are staggered in front and back of two adjacent rows, so that the resistance of the turning blades when entering the soil is reduced, the soil breaking rate is improved, and the missed plowing is effectively avoided; the turning blade adopts a semicircular table cylinder structure, the upper side of the turning blade is provided with a 30° beveled blade edge, the soil breaking and discharging of the turning blade are facilitated, the turning blade damage caused by hard stone during soil cutting is effectively avoided, and the front end outer circle of the turning blade is provided with a semicircular table structure with a front thin and rear thick structure, so that the cutting and stripping capacity of the turning blade is improved, and the cutting resistance is reduced.

[0027] The application has the advantages of scientific design, reasonable structure, simple operation, convenient control, and the like, and people can complete the soil repair process by the application after simple understanding, the influence of personnel replacement on the device function is maximally reduced, and the soil repair efficiency is improved.

[0028] The local structure position is powered by the hydraulic rod, the first hydraulic cylinder, the second hydraulic cylinder and the third hydraulic cylinder, the power element is optimized, the traditional power supply mode with low efficiency and slow response is replaced, no additional energy is consumed, the energy waste is effectively reduced, the working strength of the power component is reduced, the energy consumption is effectively reduced, the equipment failure rate and the equipment investment cost are reduced.

[0029] The application adopts the chain plate type turning and throwing crushing, coarse crushing, fine crushing, spiral uniform mixing and spiral uniform mixing integrated four-fold crushing design, can effectively layer-by-layer scanning type crushing soil, improves soil crushing rate, makes the pesticide and soil particles fully and uniformly mixed, has large plowing depth adjustment range, high soil breaking quality, strong pesticide and soil uniform mixing, high automation degree, improved comprehensive repair efficiency, effectively improves the passivation efficiency of soil heavy metals, and is beneficial to improving soil structure.

[0030] In summary, the application adopts the chain plate type turning and throwing crushing, coarse crushing, fine crushing, spiral uniform mixing and spiral uniform mixing integrated four-fold crushing design, can effectively layer-by-layer scanning type crushing soil, and integrates crushing, pesticide spraying and mixing, effectively improves soil crushing rate, enhances pesticide and soil uniform mixing, improves automation degree, and effectively improves the passivation efficiency of soil heavy metals. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is the isometric view of the application.

[0032] Figure 2 is the left side view of the application.

[0033] Figure 3 is the rear view of the application.

[0034] Figure 4 is the bottom view of Figure 2 .

[0035] Figure 5 is the partial enlarged view of A in Figure 1 .

[0036] Figure 6 is the partial enlarged view of B in Figure 1 .

[0037] Figure 7 is the partial enlarged view of C in Figure 1 .

[0038] Figure 8 is the partial enlarged view of D in Figure 1 .

[0039] Figure 9 is the partial enlarged view of E in Figure 1 . DETAILED DESCRIPTION

[0040] The embodiments of the application are further illustrated below in combination with the drawings.

[0041] As Figures 1-9The in-situ four-stage crushing soil remediation device is shown, which comprises a vehicle head 1, a vehicle frame 2, a first-stage chain plate type turning and throwing device, a pesticide spraying device, a second-stage coarse crushing device, a third-stage fine crushing spiral uniform mixing device and a fourth-stage spiral uniform mixing device. The vehicle frame 2 is horizontally fixedly connected to the rear side of the vehicle head 1 along the front-rear direction. The first-stage chain plate type turning and throwing device is arranged below the vehicle frame 2 along the front-rear direction. The front end of the first-stage chain plate type turning and throwing device is hingedly connected to the front side of the vehicle frame 2. The rear side of the vehicle head 1 is provided with a folding mechanism for driving the first-stage chain plate type turning and throwing device to turn up and down. The pesticide spraying device is installed on the front side of the vehicle frame 2. The spraying part of the pesticide spraying device is arranged below the front side of the vehicle frame 2 and above the front side of the first-stage chain plate type turning and throwing device. The spraying part of the pesticide spraying device sprays downward. The second-stage coarse crushing device, the third-stage fine crushing spiral uniform mixing device and the fourth-stage spiral uniform mixing device are vertically arranged on the rear side of the vehicle frame 2 and behind the first-stage chain plate type turning and throwing device from front to back. The vehicle head 1 is provided with a power system and a control system. The power system provides power to the first-stage chain plate type turning and throwing device, the pesticide spraying device, the second-stage coarse crushing device, the third-stage fine crushing spiral uniform mixing device, the fourth-stage spiral uniform mixing device and the folding mechanism respectively. The control system is signal connected with the first-stage chain plate type turning and throwing device, the pesticide spraying device, the second-stage coarse crushing device, the third-stage fine crushing spiral uniform mixing device, the fourth-stage spiral uniform mixing device and the folding mechanism respectively.

[0042] The vehicle head 1 adopts a tractor main body. The vehicle frame 2 is a long rectangular cover plate structure with an open bottom. The front side plate of the vehicle frame 2 has a larger up-down size than the other three side plates. A plurality of bolt seats 3 are fixed on the front side of the front side plate of the vehicle frame 2. Each bolt seat 3 is fixedly connected with the rear side of the frame of the vehicle head 1 through a bolt.

[0043] The power system comprises an engine, a generator and a small hydraulic station. The engine provides power to the generator. The generator provides power supply to the small hydraulic station, the first-stage chain plate type turning and throwing device, the pesticide spraying device, the second-stage coarse crushing device, the third-stage fine crushing spiral uniform mixing device and the fourth-stage spiral uniform mixing device. The small hydraulic station provides hydraulic power to the folding mechanism, the second-stage coarse crushing device, the third-stage fine crushing spiral uniform mixing device and the fourth-stage spiral uniform mixing device.

[0044] The primary chain plate type turning over device comprises a turning over frame 4, a chain plate type conveyor 5 and a turning over baffle 6. The turning over frame 4 is a rectangular frame, vertically arranged at the front side of the vehicle frame 2 and with the center line horizontally arranged along the front-rear direction. The lower side frame of the turning over frame 4 is higher than the ground. The left and right side frames of the turning over frame 4 are integrally formed with a lifting beam 7 extending horizontally forward. The front ends of the two lifting beams 7 are respectively hinged to the left and right sides of the lower rear side edge of the front side plate of the vehicle frame 2, and the hinge shafts are horizontally arranged along the left-right direction. The chain plate type conveyor 5 is horizontally arranged along the front-rear direction. The front side of the chain plate type conveyor 5 penetrates through the turning over frame 4 with the center forward. The left and right front sides of the frame of the chain plate type conveyor 5 are fixedly connected with the turning over frame 4. The left lifting beam 7 is fixedly installed with a turning over reduction motor 8 at the left front side of the frame of the chain plate type conveyor 5, which is used to provide power to the chain plate type conveyor 5. The moving direction of the chain plate conveyor belt of the chain plate type conveyor 5 is clockwise when viewed from the left side. The upper half of the chain plate conveyor belt of the chain plate type conveyor 5 moves from front to back. The lower half of the chain plate conveyor belt of the chain plate type conveyor 5 moves from back to front. The turning over baffle 6 is horizontally arranged above the chain plate type conveyor 5 along the front-rear direction. The front side of the turning over baffle 6 is integrally formed and fixedly connected with the upper side frame of the turning over frame 4. The rear side of the turning over baffle 6 is integrally formed with a circular arc plate 9 covering the rear end of the chain plate type conveyor 5. A plurality of turning over cutter groups are fixedly installed on the outer surface of each chain plate 10 of the chain plate type conveyor 5. The turning over cutter groups on the adjacent two chain plates 10 are arranged in staggered front-rear arrangement. The generator provides power to the turning over reduction motor 8. The control system is signal connected with the turning over reduction motor 8.

[0045] A turning over cutter group on a certain chain plate 10 on the upper half of the chain plate conveyor belt of the chain plate type conveyor 5 comprises a cutter seat 11 and a turning over cutter 12. The cutter seat 11 is fixedly installed on the outer surface of the corresponding chain plate 10 by a plurality of fastening bolts. The turning over cutter 12 is in a semi-circular table cylinder structure along the front-rear direction and large in front and small in back. The axis of the turning over cutter 12 is inclinedly arranged with the front high and the back low. The turning over cutter 12 is penetrable and open on the right side. The lower side of the turning over cutter 12 is fixedly connected with the middle part of the upper side of the cutter seat 11. The upper side of the turning over cutter is provided with a 30° inclined blade. The outer circle of the front end of the turning over cutter 12 is provided with a semi-circular table structure 13 with the front thin and the back thick, which can enhance the cutting and stripping capacity and reduce the resistance.

[0046] The retracting mechanism comprises two hydraulic rods 14, which are symmetrically arranged above the two lifting beams 7, respectively. Two vertically arranged long holes 15 are formed on the front side plate of the frame 2, and correspond to the front and rear of the two lifting beams 7, respectively. The two hydraulic rods 14 are inclinedly arranged from high to low, and correspondingly pass through the two long holes 15, respectively. The two ends of the left hydraulic rod 14 are hingedly connected to the left rear side of the frame 1 and the upper side of the rear end of the left lifting beam 7, respectively. The two ends of the right hydraulic rod 14 are hingedly connected to the right rear side of the frame 1 and the upper side of the rear end of the right lifting beam 7, respectively. A small hydraulic station provides hydraulic power to the two hydraulic rods 14. The control system is signal connected with the two hydraulic rods 14.

[0047] The pesticide spraying device comprises a pesticide spraying box 16, a pesticide storage box 17 and a pesticide pump 18, which are fixedly arranged on the front side of the upper side of the frame 2 in front and back. The top of the pesticide storage box 17 is provided with a pesticide adding cover 19. The medicine inlet of the pesticide spraying box 16 is connected with the outlet of the pesticide pump 18 through a pesticide conveying pipeline 20. The medicine outlet of the pesticide storage box 17 is connected with the inlet of the pesticide pump 18 through a pesticide suction pipeline 21. The bottom of the pesticide spraying box 16 is fixedly connected with a plurality of pesticide spraying pipes 22 arranged at intervals. Each pesticide spraying pipe 22 vertically passes through the upper side plate of the frame 2 and is located above the front side of the chain plate conveyor 5. The lower end of each pesticide spraying pipe 22 is provided with a downward electromagnetic valve nozzle 23. The generator provides power for the pesticide pump 18. The control system is signal connected with the pesticide pump 18 and each electromagnetic valve nozzle 23, respectively.

[0048] The secondary coarse crushing device comprises a first guide frame 24, a first guide sliding base 25, a crushing reduction motor 26, a coarse crushing drill bit, a first door frame type support 27 and a first hydraulic oil cylinder 28. The first guide frame 24 is a cuboid frame, which is fixedly installed at the lower side of the rear side of the upper side plate of the vehicle frame 2 and located at the rear side of the chain plate conveyor 5. The bottom of the first guide frame 24 is higher than the ground. Four first vertical guide rods 29 are fixedly arranged on the first guide frame 24 in a rectangular array. The first guide sliding base 25 is a square base with a central hole. The four side surfaces of the first guide sliding base 25 are all concave arc surfaces. The first guide sliding base 25 is horizontally arranged at the center of the first guide frame 24. Four first guide holes are formed in the four corners of the first guide sliding base 25, respectively. The four first vertical guide rods 29 pass through the four first guide holes, respectively. The first guide sliding base 25 is slidably connected to the four first vertical guide rods 29. A first square hole 30 corresponding to the first guide sliding base 25 is formed in the rear side of the upper side plate of the vehicle frame 2. The crushing reduction motor 26 is vertically arranged above the first guide sliding base 25 and can pass through the first square hole 30. The coarse crushing drill bit is vertically arranged in the middle of the four first vertical guide rods 29. The upper end of the coarse crushing drill bit is rotatably installed in the central hole of the first guide sliding base 25. The left side, the right side and the lower side of the first door frame type support 27 are all open. The first door frame type support 27 is fixedly installed at the rear side of the upper side plate of the vehicle frame 2. The first door frame type support 27 spans the first square hole 30 and covers the crushing reduction motor 26. The first hydraulic oil cylinder 28 is vertically arranged in the first door frame type support 27 and located above the crushing reduction motor 26. The piston rod of the first hydraulic oil cylinder 28 extends downward. The upper end of the cylinder body of the first hydraulic oil cylinder 28 is fixedly connected to the middle of the lower side of the upper side plate of the first door frame type support 27. The lower end of the piston rod of the first hydraulic oil cylinder 28 is fixedly connected to the top of the shell of the crushing reduction motor 26 through a first flange. In the initial state, the piston rod of the first hydraulic oil cylinder 28 is completely retracted. The first guide sliding base 25 is located at the uppermost part of the four first vertical guide rods 29. The lower end of the coarse crushing drill bit is higher than the ground. The generator provides power to the crushing reduction motor 26. The small hydraulic station provides hydraulic power to the first hydraulic oil cylinder 28. The control system is signal connected to the crushing reduction motor 26 and the first hydraulic oil cylinder 28, respectively.

[0049] The rough breaking drill bit comprises a first drill shaft 31 and a first positioning drill tip 32, the first drill shaft 31 is vertically arranged, the upper end of the first drill shaft 31 is coaxially arranged through the center hole of the first guide sliding seat 25 and is coaxially and drivingly connected with the lower end of the power shaft of the breaking reduction motor 26 through the first shaft coupling 33, the first bearing is fixedly embedded in the center hole of the first guide sliding seat 25 and is sleeved on the first drill shaft 31, the first drill shaft 31 is rotatably connected in the center hole of the first guide sliding seat 25 through the first bearing, the first positioning drill tip 32 is a conical positioning tip with large upper end and small lower end, the first positioning drill tip 32 is fixedly installed on the lower end of the first drill shaft 31, a plurality of rake rods 34 are fixedly installed on the outer circumference of the lower end of the first drill shaft 31 and are arranged in a circumferential array and radially, the lower side of the rake rod 34 is provided with a first breaking tooth 35, the first breaking tooth 35 is arranged obliquely downward, the first drill shaft 31 is divided into a plurality of combined breaking sections from bottom to top, the outer circumference of each combined breaking section is fixedly installed with a combined breaking piece, the combined breaking piece comprises breaking knives 36, rotary tillage curved knives 37 and first sawtooth knives 38 which are arranged at intervals from bottom to top, the breaking knives 36, the rotary tillage curved knives 37 and the first sawtooth knives 38 are both radially and symmetrically arranged with a pair on the outer circumference of the first drill shaft 31, and the installation angles of the breaking knives 36, the rotary tillage curved knives 37 and the first sawtooth knives 38 are staggered by 90° in sequence.

[0050] The third-stage fine crushing spiral uniform mixing device comprises a second guide frame 39, a second guide sliding seat 40, a first uniform mixing reduction motor 41, a three-stage fine crushing spiral uniform mixing drill head, a second door frame type support 42 and a second hydraulic oil cylinder 43. The second guide frame 39 is a cuboid frame, is fixedly installed at the lower side of the rear side of the upper side plate of the vehicle frame 2 and located at the rear side of the first guide frame 24, the bottom of the second guide frame 39 is higher than the ground, four second vertical guide rods 44 are fixedly arranged on the second guide frame 39 in a rectangular array, the second guide sliding seat 40 is the same in structure as the first guide sliding seat 25, is horizontally arranged at the center of the second guide frame 39, second guide holes penetrating through from top to bottom are respectively formed at the four corners of the second guide sliding seat 40, the four second vertical guide rods 44 respectively pass through the four second guide holes, the second guide sliding seat 40 is slidably connected to the four second vertical guide rods 44, a second square hole 45 corresponding to the second guide sliding seat 40 is formed at the rear side of the upper side plate of the vehicle frame 2, the first uniform mixing reduction motor 41 is vertically arranged above the second guide sliding seat 40 and can pass through the second square hole 45, the three-stage fine crushing spiral uniform mixing drill head is vertically arranged at the middle of the four second vertical guide rods 44, the upper end of the three-stage fine crushing spiral uniform mixing drill head coaxially passes through the center hole of the second guide sliding seat 40 and is coaxially and drivingly connected to the lower end of the power shaft of the first uniform mixing reduction motor 41, the upper end of the three-stage fine crushing spiral uniform mixing drill head is rotatably installed in the center hole of the second guide sliding seat 40, the left side, the right side and the lower side of the second door frame type support 42 are open, the second door frame type support 42 is fixedly installed at the rear side of the upper side plate of the vehicle frame 2, the second door frame type support 42 spans the second square hole 45 and covers the first uniform mixing reduction motor 41, the second hydraulic oil cylinder 43 is vertically arranged in the second door frame type support 42 and located above the first uniform mixing reduction motor 41, the piston rod of the second hydraulic oil cylinder 43 extends downward, the upper end of the cylinder body of the second hydraulic oil cylinder 43 is fixedly connected to the middle part of the lower side of the upper side plate of the second door frame type support 42, the lower end of the piston rod of the second hydraulic oil cylinder 43 is fixedly connected to the top of the shell of the first uniform mixing reduction motor 41 through a second flange, in the initial state, the piston rod of the second hydraulic oil cylinder 43 is completely retracted, the second guide sliding seat 40 is located at the uppermost part of the four second vertical guide rods 44, the lower end of the three-stage fine crushing spiral uniform mixing drill head is higher than the ground, the generator provides power to the first uniform mixing reduction motor 41, the small hydraulic station provides hydraulic power to the second hydraulic oil cylinder 43, and the control system is signal connected with the first uniform mixing reduction motor 41 and the second hydraulic oil cylinder 43 respectively;

[0051] The three-section fine crushing spiral mixing drill bit comprises a second drill shaft 46 and a second positioning drill tip 47. The second drill shaft 46 is vertically arranged, and the upper end of the second drill shaft 46 is coaxially arranged through the center hole of the second guide sliding seat 40 and is coaxially and drivingly connected with the lower end of the power shaft of the first mixing reduction motor 41 through the second shaft coupling 66. The second bearing is fixedly embedded in the center hole of the second guide sliding seat 40 and is sleeved on the second drill shaft 46. The second drill shaft 46 is rotatably connected in the center hole of the second guide sliding seat 40 through the second bearing. The second positioning drill tip 47 is a tapered positioning tip with a large upper end and a small lower end. The second positioning drill tip 47 is fixedly installed at the lower end of the second drill shaft 46. The second drill shaft 46 is divided into three sections from bottom to top. The first section of the second drill shaft 46 is provided with a plurality of first crushing spiral blades 48 arranged in a circumferential array and spirally arranged along the axial direction on the outer circumference. The lower end edge and the upper end edge of each first crushing spiral blade 48 are fixedly provided with second crushing teeth 49 on the outer side. The second crushing teeth 49 are arranged obliquely downward. The second section of the second drill shaft 46 is uniformly provided with a plurality of first transition spiral blades 50 arranged spirally along the axial direction and arranged in a circumferential array in a vertical projection on the outer circumference. The lower end edge of each first transition spiral blade 50 is fixedly provided with a second sawtooth cutter 51. The third section of the second drill shaft 46 is provided with first mixing spiral blades 52 arranged spirally along the axial direction on the outer circumference.

[0052] The circumferential diameter of the outer circle of the first transition spiral blade 50 is greater than the circumferential diameter of the outer circle of the first crushing spiral blade 48, which is greater than the circumferential diameter of the outer circle of the first mixing spiral blade 52. The spiral directions of the first crushing spiral blade 48, the first mixing spiral blade 52 and the first transition spiral blade 50 are the same.

[0053] The fourth-stage screw uniform mixing device comprises a third guide frame 53, a third guide sliding seat 54, a second uniform mixing reduction motor 55, a two-section screw uniform mixing drill bit, a third door frame type support 56 and a third hydraulic oil cylinder 57. The third guide frame 53 is a cuboid frame, is fixedly installed at the lower side of the rear side of the upper side plate of the vehicle frame 2 and located at the rear side of the second guide frame 39, and the bottom of the third guide frame 53 is higher than the ground. Four third vertical guide rods 58 are fixedly arranged on the third guide frame 53 in a rectangular array. The third guide sliding seat 54 has the same structure as the second guide sliding seat 40, is horizontally arranged at the center of the third guide frame 53, and has third guide holes penetrating therethrough at four corners. The four third vertical guide rods 58 pass through the third guide holes respectively. The third guide sliding seat 54 is slidably connected to the four third vertical guide rods 58. The third guide sliding seat 54 is in corresponding with the third guide sliding seat 54. The second uniform mixing reduction motor 55 is vertically arranged above the third guide sliding seat 54 and can pass through the third hole 59. The two-section screw uniform mixing drill bit is vertically arranged in the middle of the four third vertical guide rods 58. The upper end of the two-section screw uniform mixing drill bit coaxially passes through the center hole of the third guide sliding seat 54 and is coaxially and drivingly connected to the lower end of the power shaft of the second uniform mixing reduction motor 55. The upper end of the two-section screw uniform mixing drill bit is rotatably installed in the center hole of the third guide sliding seat 54. The third door frame type support 56 is open at the left side, the right side and the lower side, is fixedly installed at the rear side of the upper side plate of the vehicle frame 2, spans the third hole 59 and covers the second uniform mixing reduction motor 55. The third hydraulic oil cylinder 57 is vertically arranged in the third door frame type support 56 and located above the second uniform mixing reduction motor 55. The piston rod of the third hydraulic oil cylinder 57 extends downward. The upper end of the cylinder body of the third hydraulic oil cylinder 57 is fixedly connected to the middle part of the lower side of the upper side plate of the third door frame type support 56. The lower end of the piston rod of the third hydraulic oil cylinder 57 is fixedly connected to the top of the shell of the second uniform mixing reduction motor 55 through a third flange. In the initial state, the piston rod of the third hydraulic oil cylinder 57 is completely retracted. The third guide sliding seat 54 is located at the uppermost part of the four third vertical guide rods 58. The lower end of the two-section screw uniform mixing drill bit is higher than the ground. The generator provides power to the second uniform mixing reduction motor 55. The small hydraulic station provides hydraulic power to the third hydraulic oil cylinder 57. The control system is signal connected to the second uniform mixing reduction motor 55 and the third hydraulic oil cylinder 57 respectively.

[0054] The two-section spiral uniform mixing drill bit comprises a third drill shaft 60 and a third positioning drill tip 61. The third drill shaft 60 is vertically arranged, and the upper end of the third drill shaft 60 is coaxially arranged through the center hole of the third guide sliding seat 54 and is coaxially and drivingly connected with the lower end of the power shaft of the second uniform mixing reduction motor 55 through the third coupling 67. The third guide sliding seat 54 is fixedly embedded with a third bearing which is sleeved on the third drill shaft 60 in the center hole. The third drill shaft 60 is rotatably connected in the center hole of the third guide sliding seat 54 through the third bearing. The third positioning drill tip 61 is a tapered positioning tip with a large upper end and a small lower end. The third positioning drill tip 61 is fixedly installed on the lower end of the third drill shaft 60. The third drill shaft 60 is divided into two sections from bottom to top. From bottom to top, the outer circumference of the first section of the third drill shaft 60 is provided with a plurality of second crushing spiral blades 62 which are arranged in a circular array and spirally arranged along the axial direction. The lower end edge and the upper end edge of each second crushing spiral blade 62 are fixedly provided with third crushing teeth 63 on the outer side. The third crushing teeth 63 are arranged obliquely downward. The outer circumference of the second section of the third drill shaft 60 is spirally arranged with a second transition spiral blade 64 and a second uniform mixing spiral blade 65 from bottom to top along the axial direction. The upper end of the second transition spiral blade 64 is fixedly connected with the lower end of the second uniform mixing spiral blade 65. The length of the second section of the third drill shaft 60 is greater than the length of the first section. The axial length of the second uniform mixing spiral blade 65 is greater than the axial length of the second transition spiral blade 64.

[0055] The diameter of the circle where the outer circle of the second transition spiral blade 64 is located is greater than the diameter of the circle where the outer circle of the second crushing spiral blade 62 is located, which is greater than the diameter of the circle where the outer circle of the second uniform mixing spiral blade 65 is located. The spiral directions of the second crushing spiral blade 62, the second uniform mixing spiral blade 65 and the second transition spiral blade 64 are the same.

[0056] The bolt, the engine, the generator, the small hydraulic station, and the hydraulic pipeline, the hydraulic valve, the power supply wire and the related signal line are not shown in the figure. The vehicle head 1, the control system, the engine, the generator, the small hydraulic station, the chain plate conveyor 5, the turning and throwing reduction motor 8, the hydraulic rod 14, the pesticide pump 18, the crushing reduction motor 26, the first hydraulic oil cylinder 28, the first uniform mixing reduction motor 41, the second hydraulic oil cylinder 43, the second uniform mixing reduction motor 55, the third hydraulic oil cylinder 57, the first flange, the first coupling 33, the first bearing, the second flange, the second coupling 66, the second bearing, the third flange, the third coupling 67 and the third bearing are all conventional technologies, and the specific structure and working principle will not be described again. Among them, the control system is a device on the vehicle head 1 for the driver to control the actions of the entire vehicle and each moving part, including various control buttons, joy sticks and the like, which is similar to the commonly used control device in medium and large engineering vehicles, and the specific structure and related working principle will not be described again.

[0057] The working principle of the present application is as follows: initially, the piston rods of the hydraulic rods 14, the first hydraulic oil cylinder 28, the second hydraulic oil cylinder 43 and the third hydraulic oil cylinder 57 are in the retracted state, so that the two lifting beams 7 are in the horizontal state, the chain plate conveyor 5 is higher than the ground and is in the horizontal retracted state, and the first guide slide 25 is located at the uppermost part of the four first vertical guide rods 29, and the second guide slide 40 is located at the uppermost part of the four second vertical guide rods 44, and the third guide slide 54 is located at the uppermost part of the four third vertical guide rods 58, so that the first positioning drill tip 32, the second positioning drill tip 47 and the third positioning drill tip 61 are all higher than the ground and are in the retracted state; the worker opens the dosing cover 19 to add the prepared soil remediation agent into the storage tank 17, closes the dosing cover 19 after adding the agent, sits on the vehicle head 1 to drive the in-situ four-stage broken soil remediation device to the area to be remediated, then starts the turning and throwing reduction motor 8 and the agent pump 18 by controlling the system, and opens the electromagnetic valve nozzles 23, so that the turning and throwing reduction motor 8 drives the chain plate conveyor 5 to start moving, then the piston rods of the two hydraulic rods 14 are synchronously extended by controlling the system, so that the two hydraulic rods 14 push the two lifting beams 7 to incline at a certain angle, the two lifting beams 7 drive the chain plate conveyor 5 to move downward through the turning and throwing frame 4, so that the chain plate conveyor 5 is in a forward-high and backward-low inclined state, and the rear side of the chain plate conveyor 5 is pressed into the soil, so that the chain plate conveyor 5 continuously rotates when the chain plate conveyor 5 moves forward, and each turning and throwing knife 12 cuts the soil to form a trench, and the cut and stripped soil is continuously conveyed upward on the lower half of the chain plate conveyor 5, and the cut and stripped soil moves to the upper half of the chain plate conveyor 5 and is continuously conveyed downward on the upper half of the chain plate conveyor 5 to the rear of the trench, and the turning and throwing baffle 6 can prevent the soil from being thrown upward and falling into other areas during turning and throwing, so that the soil turning and throwing and the first breaking can be realized after a period of time, and in the process of soil turning and throwing, the agent pump 18 continuously pumps the agent in the storage tank 17 into the spraying tank 16 through the agent suction pipeline 21 and the agent conveying pipeline 20, then the agent in the spraying tank 16 is sprayed downward through the electromagnetic valve nozzles 23 at the lower ends of the agent spraying pipes 22, and the cut and stripped soil particles are sprayed with the agent when the cut and stripped soil particles are conveyed to the front upper part of the chain plate conveyor 5, so that the soil and the agent are preliminarily mixed; then, the vehicle head 1 drives the whole device to move forward slowly for a certain distance and stop, so that the second-stage coarse breaking device reaches above the initial working area of the first-stage chain plate turning and throwing device, and the first-stage chain plate turning and throwing device can continue to cut, strip and break the soil passing through the front movement, and simultaneously realize the preliminary mixing of the cut and stripped soil and the agent.Then, the crushing reduction motor 26 is started, the crushing reduction motor 26 drives the rough crushing drill bit to rotate and reach the working speed, and then the first hydraulic oil cylinder 28 is controlled to act through the operation system, the piston rod of the first hydraulic oil cylinder 28 slowly extends downward, the piston rod of the hydraulic oil cylinder pushes the crushing reduction motor 26 to move downward, then the rough crushing drill bit slowly moves downward, and the first guide sliding seat 25 slides downward along the four first vertical guide rods 29, during the downward movement of the rough crushing drill bit: when the first positioning drill tip 32 starts to move downward to contact the soil, the first positioning drill tip 32 will slowly damage the soil at the center position and around, realizing the second crushing of the soil, then the first drill shaft 31 continues to move downward until the first positioning drill tip 32 is completely drilled into the soil, the first crushing tooth 35 will contact the soil and crush the soil for the third time, the first drill shaft 31 continues to move downward until each section of the combined crushing section is completely drilled into the soil, then the crushing knives 36, rotary tillage curved knives 37 and first sawtooth knives 38 on the outer circumference of each section of the combined crushing section can cut the soil in an interlaced scanning mode, realizing the fourth crushing of the soil, and further crushing the large block of soil into small blocks of soil, so that the soil is more fully contacted with the pesticide; when the rough crushing drill bit reaches the target depth (about 1 meter), the first hydraulic oil cylinder 28 stops acting, the crushing reduction motor 26 keeps working, and drives the first drill shaft 31 to rotate all the time, the first drill shaft 31 drives each crushing knife 36, rotary tillage curved knife 37 and first sawtooth knife 38 to rotate in the turned soil to realize the rough crushing of the large block of soil;

[0058] Then, the staff drives the vehicle head 1 to make the whole device move forward again slowly for a certain distance and stop, so that the three-stage fine crushing spiral mixing drill head reaches the position above the soil which has been coarsely crushed by the second-stage coarse crushing device when the vehicle head 1 moves forward, and the second-stage coarse crushing device can continue to cut and coarsely crush the soil which has been moved through and turned over, so that the coarsely crushed soil is more fully contacted with the agent. Then, the first mixing reduction motor 41 is started, and the first mixing reduction motor 41 drives the three-stage fine crushing spiral mixing drill head to rotate forward and reach the working speed. Then, the second hydraulic oil cylinder 43 is controlled to move downward by the control system, so that the piston rod of the second hydraulic oil cylinder 43 slowly extends downward, and the first mixing reduction motor 41 is pushed to move downward by the piston rod of the second hydraulic oil cylinder 43, and then the three-stage fine crushing spiral mixing drill head slowly moves downward, and the second guide sliding seat 40 slides downward along the four second vertical guide rods 44. When the second positioning drill tip 47 starts to move downward and contacts with the soil, the second positioning drill tip 47 slowly destroys the soil at the central position and around the second positioning drill tip 47, so that the soil is crushed for the fifth time. Then, the second drill shaft 46 continues to move downward until the second positioning drill tip 47 is completely drilled into the soil, and then the lower second crushing teeth 49 crush the soil for the sixth time when the lower end edge of the first crushing spiral blade 48 contacts with the soil. The second drill shaft 46 is completely drilled into the soil when the upper end edge of the first crushing spiral blade 48 contacts with the soil, and then the upper second crushing teeth 49 crush the soil for the seventh time. Meanwhile, the first crushing spiral blades 48 can transport the soil around the second drill shaft 46 to the upper layer of the soil, so that the lower layer of the soil is mixed with the upper layer of the soil, and the soil around the second drill shaft 46 is squeezed and stirred, so that the soil and the agent are uniformly mixed for the second time. Then, the second drill shaft 46 continues to move downward under the action of the first mixing reduction motor 41, the second segment of the second drill shaft 46 starts to be drilled into the soil, and the first transition spiral blades 50 move downward and are drilled into the soil along with the second drill shaft 46. The second sawtooth knives 51 of the lower end edge of the first transition spiral blades 50 crush the soil for the eighth time. Meanwhile, the first transition spiral blades 50 can transport the soil around the second segment of the second drill shaft 46 to the upper layer of the soil, so that the lower layer of the soil is mixed with the upper layer of the soil, and the soil around the second segment of the second drill shaft 46 is squeezed and stirred, so that the soil and the agent are uniformly mixed for the third time. The second drill shaft 46 continues to move downward, the second segment of the second drill shaft 46 is completely drilled into the soil, the third segment of the second drill shaft 46 starts to be drilled into the soil, and the first mixing spiral blade 52 fully stirs and mixes the soil and the agent, so that the soil and the agent are uniformly mixed for the fourth time.When the three-section fine crushing spiral mixing drill bit reaches the target depth (about 1 meter), the second hydraulic oil cylinder 43 stops working, the first mixing reduction motor 41 keeps rotating for a period of time and then reverses for a period of time. According to the requirements, the first mixing reduction motor 41 changes the direction of rotation intermittently, so that the soil and the pesticide are fully mixed, until the target of fine crushing of soil particles and mixing with the pesticide is achieved, and then the piston rod of the second hydraulic oil cylinder 43 is controlled to shrink upwards, and the first mixing reduction motor 41 and the three-section fine crushing spiral mixing drill bit are pulled out of the soil upwards;

[0059] The operator drives the vehicle head 1 to move the whole device forward again to a certain distance and stop, so that the tertiary fine crushing and uniform mixing device reaches the upper of the soil which has been coarsely crushed in the next working area of the secondary coarse crushing device. The above-mentioned operation of the tertiary fine crushing and uniform mixing device is repeated to finely crush and uniformly mix the soil in this area to the required standard. At the same time, the quaternary uniform mixing device reaches the upper of the soil which has been finely crushed and uniformly mixed with the agent in the working area of the tertiary fine crushing and uniform mixing device. Then the third uniform mixing reduction motor 55 is started. After the two-section spiral uniform mixing drill head is rotated to the working speed by the third uniform mixing reduction motor 55, the third hydraulic cylinder 57 is controlled to slowly extend the piston rod downward by the control system. The second uniform mixing reduction motor 55 is pushed downward by the piston rod of the third hydraulic cylinder 57, and the two-section spiral uniform mixing drill head slowly moves downward. At the same time, the third guide sliding seat 54 slides downward along the four third vertical guide rods 58. When the third positioning drill tip 61 starts to move downward and contacts the soil, the third positioning drill tip 61 slowly destroys the soil at the center and around the third positioning drill tip 61, achieving the ninth crushing of the soil. Then, the third drill shaft 60 continues to move downward until the third positioning drill tip 61 is completely drilled into the soil. When the lower end edge of the second crushing spiral blade 62 contacts the soil, the lower third crushing teeth 63 crush the soil for the tenth time. When the upper end edge of the second crushing spiral blade 62 contacts the soil, the first section of the third drill shaft 60 is completely drilled into the soil. The upper third crushing teeth 63 crush the soil for the eleventh time. At the same time, the second crushing spiral blade 62 can transport the soil around the first section of the third drill shaft 60 upward, so that the lower layer of soil moves upward and mixes with the upper layer of soil, and the surrounding soil is squeezed and stirred, so that the soil and the agent are uniformly mixed for the fifth time. Then, the third drill shaft 60 continues to move downward under the action of the second uniform mixing reduction motor 55. The second transition spiral blade 64 moves downward and is drilled into the soil as the second drill shaft 46 moves downward. The second transition spiral blade 64 can transport the soil around the second section of the third drill shaft 60 upward, so that the lower layer of soil moves upward and mixes with the upper layer of soil, and the surrounding soil is squeezed and stirred, so that the soil and the agent are uniformly mixed for the sixth time. The third drill shaft 60 continues to move downward, and the second transition spiral blade 64 is completely drilled into the soil. The second uniform mixing spiral blade 65 starts to drill into the soil, and the soil and the agent are fully stirred and uniformly mixed by the second uniform mixing spiral blade 65, achieving the seventh uniform mixing of the soil and the agent.When the two-section spiral mixing drill head reaches the target depth (about 1 meter), the third hydraulic cylinder 57 stops working, the second mixing reduction motor 55 keeps rotating forward for a period of time and then reverses for a period of time, and according to requirements, the second mixing reduction motor 55 intermittently changes the rotation direction, so that the soil and the agent are fully mixed, until the soil particles and the agent are fully mixed, and then the piston rod of the third hydraulic cylinder 57 is controlled to retract upward, the second mixing reduction motor 55 and the two-section spiral mixing drill head are pulled out of the soil, the three-stage fine crushing spiral mixing device and the four-stage spiral mixing device are simultaneously operated;

[0060] Then, the staff drives the vehicle head 1 to move the whole device forward again to stop at a certain distance, so that the three-stage fine crushing spiral mixing device reaches the upper part of the coarsely crushed soil in the next working area of the two-stage coarse crushing device, and the four-stage spiral mixing device reaches the upper part of the soil which has been finely crushed and mixed with the agent in the next working area of the three-stage fine crushing spiral mixing device, and the above operations of the three-stage fine crushing spiral mixing device and the four-stage spiral mixing device are repeated, so that the soil in the corresponding area is fully crushed and mixed with the agent to meet the requirements, and then according to the above working principle, all the soil to be repaired is turned over, coarsely crushed, finely crushed, mixed with the agent, and the predetermined soil repair depth operation target is completed; finally, the piston rods of the two hydraulic rods 14 are retracted synchronously to the initial state, the first chain plate type turning device is retracted upward to the initial state, the crushing reduction motor 26, the first mixing reduction motor 41 and the second mixing reduction motor 55 are turned off, the piston rods of the first hydraulic cylinder 28, the second hydraulic cylinder 43 and the third hydraulic cylinder 57 are controlled to retract upward to the initial state, the crushing reduction motor 26, the coarse crushing drill head, the first mixing reduction motor 41, the three-stage fine crushing spiral mixing drill head, the second mixing reduction motor 55 and the two-section spiral mixing drill head are all pulled up to the initial state, and the turning reduction motor 8, the agent pump 18 and the electromagnetic valve nozzles 23 are turned off.

[0061] The turning blades 12 are staggered in front and back in two adjacent rows, which can reduce the resistance when the turning blades 12 enter the soil, improve the soil breaking rate, and effectively avoid missed plowing; the turning blades 12 adopt a semi-circular table cylinder structure, the upper side of the turning blade 12 is provided with a 30° beveled blade edge, which facilitates the crushing and discharge of the soil by the turning blade 12, and also effectively avoids damage to the cutting tool caused by hard stone blocks when the turning blade 12 cuts the soil; the front end outer circle of the turning blade 12 is provided with a semi-circular table structure 13 with a front thin and rear thick structure, which can enhance the cutting and stripping capacity of the turning blade 12 and reduce the cutting resistance.

[0062] The present application has the advantages of scientific design, reasonable structure, simple operation, convenient control, and people can complete the soil repair process by simple understanding, which maximizes the reduction of personnel replacement on the function of the device and improves the soil repair efficiency.

[0063] The local structure position of the application is powered by the hydraulic rod 14, the first hydraulic oil cylinder 28, the second hydraulic oil cylinder 43 and the third hydraulic oil cylinder 57, realizes the optimization of power elements, replaces the traditional power supply mode with low efficiency and slow response, does not consume additional energy, can effectively reduce energy waste, and can effectively reduce the working strength of power components, can effectively reduce energy consumption, reduce equipment failure rate and equipment investment cost.

[0064] The application adopts the chain plate type turning and throwing, crushing, fine crushing and spiral uniform mixing fourfold crushing design, can effectively scan and crush the soil layer by layer, improves the soil crushing rate, makes the pesticide and soil particles fully and uniformly mixed, has large plowing depth adjustment range, high soil breaking quality, strong pesticide and soil mixing, high automation degree, improved comprehensive repair efficiency, effectively improves the passivation efficiency of soil heavy metals, and is beneficial to improve the soil structure.

[0065] The above examples are only used to illustrate but not to limit the technical solutions of the application, although the application is described in detail with reference to the above examples, those skilled in the art should understand that; the application can still be modified or replaced equivalently without departing from the spirit and scope of the application, any modification or partial replacement should be covered in the scope of the claims of the application.

Claims

1. In-situ four-stage crushing soil remediation device, characterized by: The vehicle comprises a vehicle head, a vehicle frame, a first-stage chain plate type flipping device, a medicine spraying device, a second-stage coarse crushing device, a third-stage fine crushing spiral mixing device and a fourth-stage spiral mixing device. The vehicle frame is horizontally fixedly connected to the rear side of the vehicle head in the front-to-back direction. The first-stage chain plate type flipping device is arranged directly below the vehicle frame in the front-to-back direction. The front end of the first-stage chain plate type flipping device is hinged on the front side of the vehicle frame. A retracting mechanism for driving the first-stage chain plate type flipping device to flip up and down is provided on the rear side of the vehicle head. The medicine spraying device is installed on the front side of the vehicle frame. The spraying part of the medicine spraying device is arranged at the lower part of the front side of the vehicle frame and is located above the front side of the first-stage chain plate type flipping device. The medicine spraying device The spraying part sprays downward, the secondary coarse crushing device, the tertiary fine crushing spiral mixing device and the fourth-stage spiral mixing device are vertically installed on the rear side of the frame from front to back and are located behind the primary chain plate type turning and throwing device. A power system and a control system are provided on the head of the vehicle. The power system provides power to the primary chain plate type turning and throwing device, the chemical spraying device, the secondary coarse crushing device, the tertiary fine crushing spiral mixing device, the fourth-stage spiral mixing device and the retracting and releasing mechanism respectively. The control system is respectively connected to the primary chain plate type turning and throwing device, the chemical spraying device, the secondary coarse crushing device, the tertiary fine crushing spiral mixing device, the fourth-stage spiral mixing device and the retracting and releasing mechanism by signal; The secondary coarse crushing device includes a first guide frame, a first guide slide, a crushing reduction motor, a coarse crushing drill bit, a first door frame-type bracket and a first hydraulic cylinder. The first guide frame is a rectangular parallelepiped frame, the first guide frame is fixedly mounted on the lower side of the rear side of the upper side plate of the vehicle frame and is located at the rear side of the chain plate conveyor, the bottom of the first guide frame is higher than the ground, and four first vertical guide rods are fixed on the first guide frame, and the four first vertical guide rods are arranged in a rectangular array. The first guide slide is a square seat with a center hole, and the four side surfaces of the first guide slide are arc surfaces concave toward the center. The first guide slide is horizontally arranged in the first guide frame with the same center, and the four corners of the first guide slide are respectively provided with first guide holes that are transparent up and down, and the four first vertical guide rods pass through the four first guide holes respectively. The first guide slide is slidably connected to the four first vertical guide rods up and down, and the rear side of the upper side plate of the vehicle frame is provided with a first square hole corresponding to the first guide slide up and down. The crushing reduction motor is vertically arranged directly above the first guide slide and can pass through the first square hole up and down. The head is vertically arranged in the middle of the four first vertical guide rods, and the upper end of the coarse crushing drill bit is rotatably mounted in the center hole of the first guide slide, and the left, right and lower sides of the first door frame-type bracket are open, and the first door frame-type bracket is fixedly mounted on the rear side of the upper side plate of the frame, and the first door frame-type bracket spans the first square hole front and back and covers directly above the crushing reduction motor, and the first hydraulic cylinder is vertically arranged in the first door frame-type bracket and is located directly above the crushing reduction motor, and the piston rod of the first hydraulic cylinder extends downward, and the upper end of the cylinder body of the first hydraulic cylinder is fixedly connected to the middle of the lower side of the upper side plate of the first door frame-type bracket, and the lower end of the piston rod of the first hydraulic cylinder is fixedly connected to the top of the crushing reduction motor casing through the first flange. In the initial state, the piston rod of the first hydraulic cylinder is fully retracted, the first guide slide is located at the uppermost part of the four first vertical guide rods, and the lower end of the coarse crushing drill bit is above the ground, the generator provides power to the crushing reduction motor, and the small hydraulic station provides hydraulic power to the first hydraulic cylinder, and the control system is respectively connected to the crushing reduction motor and the first hydraulic cylinder signal; The coarse crushing drill bit includes a first drill shaft and a first positioning drill tip. The first drill shaft is vertically arranged. The upper end of the first drill shaft coaxially passes through the center hole of the first guide slide and is coaxially connected to the lower end of the power shaft of the crushing reduction motor through the first coupling. A first bearing mounted on the first drill shaft is fixedly embedded in the center hole of the first guide slide. The first drill shaft is rotatably connected to the center hole of the first guide slide through the first bearing. The first positioning drill tip is a conical positioning tip with a larger upper part and a smaller lower part. The first positioning drill tip is fixedly mounted on the lower end of the first drill shaft. The outer diameter of the lower end of the first drill shaft A number of rake rods arranged in a circular array and radially are fixedly installed around the drill shaft, a first crushing tooth is arranged on the lower side of the rake rod, and the first crushing tooth is arranged obliquely downward. The first drill shaft is divided into several combined crushing segments from bottom to top, and a combined crushing part is fixedly installed on the outer circumference of each combined crushing segment. The combined crushing part includes a crushing knife, a rotary tillage machete and a first serrated knife which are arranged at intervals from bottom to top. The crushing knife, the rotary tillage machete and the first serrated knife are all radially symmetrically arranged in a pair on the outer circumference of the first drill shaft, and the installation angles of the crushing knife, the rotary tillage machete and the first serrated knife are staggered by 90° in sequence.

2. The in-situ four-stage crushing soil remediation device according to claim 1 is characterized in that: The front of the vehicle adopts the tractor body, and the frame is a rectangular cover structure with an open lower side. The upper and lower dimensions of the front side plate of the frame are larger than the upper and lower dimensions of the other three side plates of the frame. A plurality of latch seats are fixed on the front side of the front side plate of the frame, and each latch seat is fixedly connected to the rear side of the frame of the front of the vehicle through a latch; The power system includes an engine, a generator and a small hydraulic station. The engine provides power to the generator, and the generator provides power to the small hydraulic station, the first-level chain plate turning device, the chemical spraying device, the second-level coarse crushing device, the third-level fine crushing spiral mixing device and the fourth-level spiral mixing device. The small hydraulic station provides hydraulic power to the retracting and extending mechanism, the second-level coarse crushing device, the third-level fine crushing spiral mixing device and the fourth-level spiral mixing device.

3. The in-situ four-stage crushing soil remediation device according to claim 2, characterized in that: The first-stage chain plate type turning device includes a turning frame, a chain plate conveyor and a turning baffle. The turning frame is a rectangular frame. The turning frame is vertically arranged directly below the front side of the frame and its center line is horizontally arranged along the front and rear directions. The lower side frame of the turning frame is higher than the ground. The upper middle side of the left side frame and the upper middle side of the right side frame of the turning frame are both integrally formed with a lifting beam extending horizontally forward. The front ends of the two lifting beams are respectively hinged to the left and right sides of the rear lower edge of the front side plate of the frame and the hinge axes are horizontally arranged along the left and right directions. The chain plate conveyor is horizontally arranged along the front and rear directions. The front side of the chain plate conveyor passes through the turning frame forward with the same center. The front left and right sides of the frame of the chain plate conveyor are fixedly connected to the turning frame. The lower rear part of the left lifting beam is fixedly installed with a lifting beam located on the left front side of the chain plate conveyor frame and used to lift Power is supplied to the flipping reduction motor of the chain plate conveyor. The movement direction of the chain plate conveyor belt of the chain plate conveyor is clockwise when viewed from its left side. The upper half of the chain plate conveyor belt of the chain plate conveyor moves from front to back, and the lower half of the chain plate conveyor belt of the chain plate conveyor moves from back to front. The flipping baffle is horizontally arranged in the front-to-back direction directly above the chain plate conveyor. The front side of the flipping baffle is integrally formed and fixedly connected with the upper side frame of the flipping frame. The rear side of the flipping baffle is integrally formed with an arc plate covering the upper rear end of the chain plate conveyor. Several flipping knife groups are fixedly installed on the outer surface of each chain plate of the chain plate conveyor at intervals on the left and right. The flipping knife groups on the two adjacent chain plates are staggered front and back. The generator provides power to the flipping reduction motor, and the control system is connected to the flipping reduction motor signal.

4. The in-situ four-stage crushing soil remediation device according to claim 3 is characterized in that: A flipping knife group on a chain plate of the upper half of the chain plate conveyor belt of the chain plate conveyor includes a knife holder and a flipping knife. The knife holder is fixedly mounted on the outer surface of the corresponding chain plate by a number of fastening bolts. The flipping knife is a semicircular table cylinder structure along the front-to-back direction and is larger in the front and smaller in the back. The axis of the flipping knife is tilted high in the front and lower in the back. The flipping knife is transparent in front and back and the open side is facing right. The lower side of the flipping knife is fixedly connected to the middle part of the upper side surface of the knife holder. The upper side of the flipping knife is provided with a blade with a 30° slope. The outer circle of the front end of the flipping knife is provided with a semicircular table structure that is thin in the front and thick in the back.

5. The in-situ four-stage crushing soil remediation device according to claim 4 is characterized in that: The retraction and extension mechanism includes two hydraulic rods, which are symmetrically arranged on the top of the two lifting beams. Two long holes spaced apart on the left and right are vertically opened on the upper edge of the front side plate of the frame. The two long holes correspond to the front and rear of the two lifting beams respectively. The two hydraulic rods are tilted with the front higher and the rear lower and pass through the two long holes respectively. The two ends of the left hydraulic rod are respectively hinged to the left rear side of the frame of the front of the vehicle and the upper side of the rear end of the lifting beam on the left. The two ends of the right hydraulic rod are respectively hinged to the right rear side of the frame of the front of the vehicle and the upper side of the rear end of the lifting beam on the right. A small hydraulic station provides hydraulic power to the two hydraulic rods, and the control system is connected to the signals of the two hydraulic rods.

6. The in-situ four-stage crushing soil remediation device according to claim 4, characterized in that: The drug spraying device includes a drug spray box, a drug storage box and a drug pump. The drug spray box, the drug storage box and the drug pump are fixedly arranged on the front side of the upper side of the frame at front and rear intervals. A drug adding cover is provided on the top of the drug storage box. The drug inlet of the drug spray box is connected to the outlet of the drug pump through a drug delivery pipe. The drug outlet of the drug storage box is connected to the inlet of the drug pump through a drug suction pipe. The bottom of the drug spray box is fixedly connected to a plurality of drug spray pipes spaced apart on the left and right. Each drug spray pipe vertically passes through the upper side plate of the frame and is located above the front side of the chain conveyor. The lower end of each drug spray pipe is equipped with a downward-spraying solenoid valve nozzle. The generator provides power to the drug pump, and the control system is respectively connected to the drug pump and each solenoid valve nozzle signal.

7. The in-situ four-stage crushing soil remediation device according to claim 6, characterized in that: The three-stage fine crushing spiral mixing device includes a second guide frame, a second guide slide, a first mixing reduction motor, a three-stage fine crushing spiral mixing drill bit, a second door frame-type bracket and a second hydraulic cylinder. The second guide frame is a rectangular parallelepiped frame. The second guide frame is fixedly mounted on the lower side of the rear side of the upper side plate of the frame and is located on the rear side of the first guide frame. The bottom of the second guide frame is higher than the ground. Four second vertical guide rods are fixed on the second guide frame. The four second vertical guide rods are arranged in a rectangular array. The second guide slide has the same structure as the first guide slide. The second guide slide is horizontally arranged on the same center. The four corners of the second guide slide are respectively provided with second guide holes which are transparent up and down. The four second vertical guide rods pass through the four second guide holes respectively. The second guide slide is slidably connected to the four second vertical guide rods up and down. The rear side of the upper side plate of the frame is provided with a second square hole which corresponds to the second guide slide up and down. The size of the second square hole is smaller than that of the second guide slide. The first uniform mixing reduction motor is vertically arranged directly above the second guide slide and can pass through the second square hole up and down. The three-stage fine crushing spiral uniform mixing drill bit is vertically arranged in the middle of the four second vertical guide rods. The three-stage fine crushing spiral uniform mixing drill bit is vertically arranged in the middle of the four second vertical guide rods. The upper end of the mixing drill bit coaxially passes through the center hole of the second guide slide and is coaxially connected to the lower end of the power shaft of the first uniform mixing reduction motor. The upper end of the three-stage fine crushing spiral uniform mixing drill bit is rotatably installed in the center hole of the second guide slide. The left, right and bottom sides of the second door frame type bracket are open. The second door frame type bracket is fixedly installed on the rear side of the upper side plate of the frame. The second door frame type bracket spans the second square hole front and back and covers the first uniform mixing reduction motor. The second hydraulic cylinder is vertically arranged in the second door frame type bracket and is located directly above the first uniform mixing reduction motor. The piston rod of the second hydraulic cylinder is The cam is connected to the second hydraulic cylinder by means of a second flange and a second flange, and the piston rod of the second hydraulic cylinder is connected to the top of the first mixing reduction motor by means of a second flange. In the initial state, the piston rod of the second hydraulic cylinder is fully retracted, the second guide slide is located at the uppermost part of the four second vertical guide rods, the lower end of the three-stage fine crushing spiral mixing drill head is higher than the ground, the generator provides power to the first mixing reduction motor, the small hydraulic station provides hydraulic power to the second hydraulic cylinder, and the control system is respectively connected to the first mixing reduction motor and the second hydraulic cylinder by means of a signal. The three-stage fine crushing spiral homogenizing drill bit includes a second drill shaft and a second positioning drill tip. The second drill shaft is vertically arranged. The upper end of the second drill shaft coaxially passes through the center hole of the second guide slide and is coaxially connected to the lower end of the power shaft of the first homogenizing reducer motor through the second coupling. A second bearing sleeved on the second drill shaft is fixedly embedded in the center hole of the second guide slide. The second drill shaft is rotatably connected to the center hole of the second guide slide through the second bearing. The second positioning drill tip is a conical positioning tip with a larger upper part and a smaller lower part. The second positioning drill tip is fixedly mounted on the lower end of the second drill shaft; the second drill shaft is divided into three sections from bottom to top. Counting from bottom to top: a plurality of first crushing spiral blades are mounted on the outer circumference of the first section of the second drill shaft in a circular array and arranged helically along the axial direction. Second crushing teeth are fixedly provided on the outer sides of the lower and upper edges of each first crushing spiral blade, and the second crushing teeth are arranged obliquely downward. A plurality of first transition spiral blades are evenly mounted on the outer circumference of the second section of the second drill shaft in an axial spiral distribution and a vertical projection in a circular array. A second serrated knife is fixedly mounted on the lower edge of each first transition spiral blade. A first mixing spiral blade is arranged helically along the axial direction on the outer circumference of the third section of the second drill shaft. The outer diameter of the first transition spiral blade is greater than the outer diameter of the first crushing spiral blade and greater than the outer diameter of the first mixing spiral blade. The first crushing spiral blade, the first mixing spiral blade and the first transition spiral blade have the same spiral direction.

8. The in-situ four-stage crushing soil remediation device according to claim 7, characterized in that: The four-stage spiral mixing device includes a third guide frame, a third guide slide, a second mixing reduction motor, a two-stage spiral mixing drill bit, a third door frame-type bracket and a third hydraulic cylinder. The third guide frame is a rectangular parallelepiped frame. The third guide frame is fixedly mounted on the lower side of the rear side of the upper side plate of the frame and is located on the rear side of the second guide frame. The bottom of the third guide frame is higher than the ground. Four third vertical guide rods are fixed on the third guide frame. The four third vertical guide rods are arranged in a rectangular array. The third guide slide has the same structure as the second guide slide. The third guide slide is horizontal with the center. The third guide hole is set up in the four corners of the third guide slide, and the four third vertical guide rods pass through the four third guide holes respectively. The third guide slide is slidably connected to the four third vertical guide rods. The rear side of the upper side plate of the frame is provided with a third hole corresponding to the third guide slide up and down. The second uniform mixing reduction motor is vertically arranged just above the third guide slide and can pass through the third hole up and down. The two-stage spiral uniform mixing drill bit is vertically arranged in the middle of the four third vertical guide rods. The upper end of the two-stage spiral uniform mixing drill bit coaxially passes through the third The center hole of the guide slide is coaxially connected to the lower end of the power shaft of the second uniform mixing reduction motor, the upper end of the two-stage spiral uniform mixing drill bit is rotatably installed in the center hole of the third guide slide, the left side, right side and bottom side of the third door frame type bracket are open, the third door frame type bracket is fixedly installed on the rear side of the upper side plate of the frame, the third door frame type bracket spans the third hole front and back and covers the second uniform mixing reduction motor directly above, the third hydraulic cylinder is vertically arranged in the third door frame type bracket and is located directly above the second uniform mixing reduction motor, the piston rod of the third hydraulic cylinder extends downward, the third The upper end of the cylinder body of the hydraulic cylinder is fixedly connected to the middle part of the lower side of the upper side plate of the third door frame-type bracket, and the lower end of the piston rod of the third hydraulic cylinder is fixedly connected to the top of the housing of the second uniform mixing reduction motor through the third flange. In the initial state, the piston rod of the third hydraulic cylinder is fully retracted, the third guide slide is located at the uppermost part of the four third vertical guide rods, the lower end of the two-stage spiral uniform mixing drill head is higher than the ground, the generator provides power to the second uniform mixing reduction motor, the small hydraulic station provides hydraulic power to the third hydraulic cylinder, and the control system is respectively connected to the second uniform mixing reduction motor and the third hydraulic cylinder signal; The two-stage spiral mixing drill bit includes a third drill shaft and a third positioning drill tip. The third drill shaft is vertically arranged, and the upper end of the third drill shaft coaxially passes through the center hole of the third guide slide and is coaxially connected to the lower end of the power shaft of the second mixing reduction motor through the third coupling. A third bearing sleeved on the third drill shaft is fixedly embedded in the center hole of the third guide slide, and the third drill shaft is rotatably connected to the center hole of the third guide slide through the third bearing. The third positioning drill tip is a conical positioning tip with a larger upper part and a smaller lower part. The third positioning drill tip is fixedly mounted on the lower end of the third drill shaft; the third drill shaft is divided into two sections from bottom to top, counting from bottom to top: the third drill shaft A plurality of second crushing spiral blades are mounted on the outer circumference of one section in a circular array and arranged helically along the axial direction. Third crushing teeth are fixedly provided on the outer sides of the lower and upper edges of each second crushing spiral blade, and the third crushing teeth are arranged obliquely downward. Second transition spiral blades and second mixing spiral blades are arranged helically along the axial direction from bottom to top on the outer circumference of the second section of the third drill shaft. The upper end of the second transition spiral blade is integrally formed and fixedly connected to the lower end of the second mixing spiral blade. The length of the second section of the third drill shaft is greater than that of the first section thereof, and the axial length of the second mixing spiral blade is greater than that of the second transition spiral blade. The outer diameter of the second transition spiral blade is greater than the outer diameter of the second crushing spiral blade and greater than the outer diameter of the second mixing spiral blade. The second crushing spiral blade, the second mixing spiral blade and the second transition spiral blade have the same spiral direction.

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