CN114260306A

CN114260306A - Contaminated soil remediation device and remediation method in land reclamation

Info

Publication number: CN114260306A
Application number: CN202111630825.8A
Authority: CN
Inventors: 王峰; 马永东; 李娜
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-04-01
Anticipated expiration: 2041-12-28
Also published as: CN114260306B

Abstract

The invention provides a polluted soil restoration device in soil remediation, which comprises an excavator main body, wherein one end of the excavator main body is rotatably connected with a head rod through a shaft pin, one end of the excavator main body, which is close to the head rod, is rotatably connected with a first hydraulic cylinder through the shaft pin, the extending end of the first hydraulic cylinder is rotatably connected with one end of the head rod through the shaft pin, one end of the head rod, which is far away from the first hydraulic cylinder, is provided with a screening bucket, and one end of the head rod, which is close to the screening bucket, is provided with a driving mechanism for driving the screening bucket to rotate; according to the invention, the protection mechanism can simultaneously perform protection work when the screening and crushing work is performed on the screening bucket, and the probability of stones falling out of the screening bucket can be effectively reduced when the screening and crushing work is performed, so that the safety performance during work is improved.

Description

Contaminated soil remediation device and remediation method in land reclamation

Technical Field

The invention relates to the technical field of soil remediation devices, in particular to a contaminated soil remediation device and a remediation method in soil remediation.

Background

In the soil remediation process, a crushing and screening hopper is usually adopted to assist in completing the soil remediation work, the crushing and screening hopper mainly has the functions of crushing large soil into small-grained soil and screening out larger stones in the soil, and the crushing and screening hopper is installed on an excavator for operation when in use;

but there is certain problem in current crushing and screening fill equipment when using: when the broken screening of grazing heart, spill in soil follow broken screening fill, when only remaining the stone, along with the fast rotation of crushing roller, some less stones are easy to be broken out in broken screening fill under the striking of crushing roller, and the rotational speed of crushing roller is higher again, the stone of breaking out is a very big risk to the staff of peripheral operation, and its direction of broken screening fill when using is just in time towards the excavator driver's cabin, the stone of breaking out is hit easily on hitting the glass window of preventing before the driver's cabin, thereby the risk of beating the glass window garrulous exists.

Therefore, there is a need to provide a new device and method for remedying contaminated soil in land reclamation to solve the above technical problems.

Disclosure of Invention

In order to solve the technical problems, the invention provides a polluted soil remediation device and a remediation method in soil remediation.

The invention provides a polluted soil restoration device in soil remediation, which comprises an excavator main body, wherein one end of the excavator main body is rotationally connected with a head rod through a shaft pin, one end of the excavator main body close to the head rod is rotationally connected with a first hydraulic cylinder through a shaft pin, the extending end of the first hydraulic cylinder is rotationally connected with one end of the head rod through the shaft pin, the end of the head rod, which is far away from the first hydraulic cylinder, is provided with a screening bucket, the end of the head rod, which is close to the screening bucket, is provided with a driving mechanism for driving the screening bucket to rotate, the inner wall of the screening bucket is provided with a crushing and screening component, the bottom of one end of the head rod close to the screening bucket is provided with a protection mechanism for protecting during crushing and screening, the protection mechanism consists of a cover plate mechanism fixed on the head rod and a locking mechanism fixed at one end of the cover plate mechanism.

Preferably, actuating mechanism includes second pneumatic cylinder, first pivot, even board, mounting panel and connecting rod, the one end that the head bar is close to the screening scraper bowl is rotated through the pivot and is connected with the second pneumatic cylinder, the end that stretches out of second pneumatic cylinder rotates through the bearing and is connected with first pivot, the middle part of first pivot is rotated through the bearing and is connected with even board, the one end of keeping away from first pivot even the board is rotated through the pivot and is connected with the mounting panel, the mounting panel is kept away from even one end of board and is connected through the tip rotation of pivot with the head bar, the both ends of first pivot are rotated through the bearing symmetry and are connected with the connecting rod, two the one end that first pivot was kept away from to the connecting rod all is connected through the outer wall rotation of pivot with the head bar, the screening scraper bowl is fixed with the bottom of mounting panel.

Preferably, the cover plate mechanism comprises fixing plates, a third rotating shaft, rotating strips, a main cover plate, an auxiliary cover plate mechanism, a first torsion spring, a driven gear, a driving half gear, a second rotating shaft and a speed reduction motor, wherein the fixing plates are symmetrically fixed at the bottom of one end, close to the screening bucket, of the head rod, one ends, far away from the head rod, of the two fixing plates are rotatably connected with the third rotating shaft through bearings, the rotating strips are symmetrically fixed at two ends of the third rotating shaft, the main cover plate is fixed at one end, far away from the third rotating shaft, of the two rotating strips, the middle of the main cover plate is rotatably connected with the auxiliary cover plate mechanism through bearings, the main cover plate is positioned right above the screening bucket, the first torsion spring is fixed at the middle of the third rotating shaft, one end, far away from the third rotating shaft, of the first torsion spring is fixed with the surface of one fixing plate at one side, and the driven gear is symmetrically fixed at two ends of the third rotating shaft, the second pivot passes through the bearing and rotates the one end of connecting near the mounting panel at the first pole, one side that the first pole is close to second pivot one end is fixed with gear motor, the one end of second pivot is fixed with gear motor's output, the both ends symmetry of second pivot is fixed with initiative half-gear, initiative half-gear is connected with driven gear meshing.

Preferably, a reinforcing plate is fixed at one end of each of the two rotating strips close to the main cover plate, and one side of the reinforcing plate is fixed on the surface of the main cover plate.

Preferably, vice apron mechanism includes bull stick, vice apron, second torsion spring and baffle, the main middle part of lapping keeping away from rotation strip one side is rotated through the bearing and is connected with the bull stick, the middle part of bull stick is fixed with vice apron, the both ends symmetry of bull stick is fixed with second torsion spring, the one end that the bull stick was kept away from to second torsion spring and the fixed surface of main apron, one side symmetry of main apron is fixed with the baffle, and the surface extrusion contact of vice apron and baffle.

Preferably, the inner side of the main cover plate is symmetrically fixed with a reinforcing sleeve, and the rotating rod is rotatably connected with the inner wall of the reinforcing sleeve through a bearing.

Preferably, locking mechanical system includes locking disk, locking hole, sliding sleeve, gag lever post, third spring and cam, the both ends symmetry of third pivot is fixed with the locking disk, the locking hole has been seted up to one side of locking disk outer wall, the bilateral symmetry that the head rod is close to locking disk one end is fixed with the sliding sleeve, the inner wall sliding connection of sliding sleeve has the gag lever post, the gag lever post cooperatees with the locking hole, the one end that the gag lever post is close to the locking disk is fixed with the third spring, the one end that the gag lever post was kept away from to the third spring is fixed with the outer wall of sliding sleeve, the both ends symmetry of second pivot is fixed with the cam, the gag lever post is close to the one end of cam and the surface roll connection of cam.

Preferably, one end of the limiting rod, which is close to the cam, is rotatably connected with a roller through a shaft pin, the roller is in rolling connection with the surface of the cam, and the cam is in extrusion contact with the surface of the roller.

Preferably, the screening bucket is fixed with the strengthening rib near the one side symmetry of mounting panel, one side and the surface mounting of mounting panel of strengthening rib.

The invention also provides a method for restoring the polluted soil in soil remediation, which comprises the following steps:

1) mixing the polluted soil with quicklime through equipment, further crushing and screening the polluted soil through a polluted soil remediation device in land reclamation, crushing the massive soil into granules, and screening and removing larger impurity stones in the soil;

2) preheating the treated polluted soil by using flue gas generated by fuel combustion of a thermal desorption device, and then putting the preheated polluted soil into a desorption device for secondary heating;

3) sequentially carrying out cooling water spraying, demisting and activated carbon adsorption on the mixed steam generated after secondary heating, then discharging the mixed steam into the atmosphere at high altitude, and directly discharging the soil heated in the step 2);

4) and spraying water mist to the soil discharged in the step 3), humidifying and dedusting, and transporting the treated soil to a designated area.

Compared with the related art, the device and the method for repairing the polluted soil in the land remediation have the following beneficial effects:

according to the invention, the protection mechanism can simultaneously perform protection work when the screening and crushing work is performed on the screening bucket, and compared with the traditional screening bucket, the protection mechanism can effectively reduce the probability of stones falling out of the screening bucket when the screening and crushing work is performed, thereby effectively reducing the risk of construction workers during operation, and effectively reducing the probability of damage of the glass window of the excavator operating room by the fallen stones.

Drawings

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

FIG. 2 is a schematic view of the driving mechanism of the present invention;

FIG. 3 is an enlarged view of the invention at A;

FIG. 4 is a schematic view of the guard mechanism of the present invention;

FIG. 5 is an enlarged view of the invention at B;

FIG. 6 is a schematic structural diagram of a cover plate mechanism of the present invention;

FIG. 7 is an enlarged view of the invention at C;

FIG. 8 is an enlarged view of the invention at D;

FIG. 9 is a schematic view of the position structure of the gear motor of the present invention;

FIG. 10 is an enlarged view of the invention at E;

FIG. 11 is a schematic view of a locking mechanism according to the present invention;

FIG. 12 is an enlarged view of the invention at F;

FIG. 13 is a second schematic view of the locking mechanism of the present invention;

FIG. 14 is a schematic diagram of the method of the present invention.

Reference numbers in the figures: 1. an excavator main body; 2. a head rod; 3. a first hydraulic cylinder; 4. screening a bucket; 5. a drive mechanism; 51. a second hydraulic cylinder; 52. a first rotating shaft; 53. connecting plates; 54. mounting a plate; 56. a connecting rod; 6. a crushing screen assembly; 7. a protection mechanism; 71. a cover plate mechanism; 711. a fixing plate; 712. a third rotating shaft; 713. rotating the strip; 714. a main cover plate; 715. an auxiliary cover plate mechanism; 7151. a rotating rod; 7152. a secondary cover plate; 7153. a second torsion spring; 7154. a baffle plate; 716. a first torsion spring; 717. a driven gear; 718. a driving half gear; 719. a second rotating shaft; 7110. a reduction motor; 72. a locking mechanism; 721. a locking disk; 722. a locking hole; 723. a sliding sleeve; 724. a limiting rod; 725. a third spring; 726. a cam; 8. a reinforcing plate; 9. reinforcing the sleeve; 10. a roller; 11. and (5) reinforcing ribs.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Specific implementations of the present invention are described in detail below with reference to specific embodiments.

Referring to fig. 1, 2, 4 and 5, a contaminated soil remediation device for soil remediation according to an embodiment of the present invention includes an excavator main body 1, a head rod 2 is rotatably connected to one end of the excavator main body 1 through a shaft pin, a first hydraulic cylinder 3 is rotatably connected to one end of the excavator main body 1 close to the head rod 2 through a shaft pin, an extending end of the first hydraulic cylinder 3 is rotatably connected to one end of the head rod 2 through a shaft pin, a screening bucket 4 is installed at one end of the head rod 2 far from the first hydraulic cylinder 3, a driving mechanism 5 for driving the screening bucket 4 to rotate is installed at one end of the head rod 2 close to the screening bucket 4, a crushing and screening assembly 6 is installed on an inner wall of the screening bucket 4, a protection mechanism 7 for performing protection work during crushing and screening is installed at a bottom of one end of the head rod 2 close to the screening bucket 4, the guard mechanism 7 is composed of a cover plate mechanism 71 fixed on the head rod 2 and a locking mechanism 72 fixed at one end of the cover plate mechanism 71.

It should be noted that the crushing and screening assembly 6 is described in principle with the mechanism for crushing and screening in the prior art screening bucket 4.

Referring to fig. 2 and 3, the driving mechanism 5 includes a second hydraulic cylinder 51, a first rotating shaft 52, a connecting plate 53, a mounting plate 54 and a connecting rod 56, the end of the head rod 2 near the sieving bucket 4 is pivotally connected to a second hydraulic cylinder 51, an extending end of the second hydraulic cylinder 51 is rotatably connected with a first rotating shaft 52 through a bearing, the middle part of the first rotating shaft 52 is rotatably connected with a connecting plate 53 through a bearing, the end of the connecting plate 53 far away from the first rotating shaft 52 is rotatably connected with a mounting plate 54 through a shaft pin, the end of the mounting plate 54 away from the connecting plate 53 is rotatably connected with the end of the head rod 2 through a shaft pin, the two ends of the first rotating shaft 52 are symmetrically and rotatably connected with connecting rods 56 through bearings, one ends, far away from the first rotating shaft 52, of the two connecting rods 56 are rotatably connected with the outer wall of the head rod 2 through shaft pins, and the screening bucket 4 is fixed to the bottom of the mounting plate 54.

It should be noted that the principle of the driving mechanism 5 is the same as that of a mechanism in the prior art in which an excavator drives a bucket to rotate, the connecting plate 53, the mounting plate 54, the head rod 2 and the connecting rod 56 can form a quadrilateral, and the mounting plate 54 can be driven to rotate around a pivot by the extension or contraction of the second hydraulic cylinder 51 according to the principle of a quadrilateral movement mechanism, so as to achieve the effect of driving the sieving bucket 4 to rotate.

Referring to fig. 4, 6, 7, 9 and 10, the cover plate mechanism 71 includes a fixing plate 711, a third rotating shaft 712, a rotating bar 713, a main cover plate 714, an auxiliary cover plate mechanism 715, a first torsion spring 716, a driven gear 717, a driving half gear 718, a second rotating shaft 719 and a reduction motor 7110, the fixing plate 711 is symmetrically fixed at the bottom of the end of the head rod 2 close to the sieving bucket 4, the third rotating shaft 712 is rotatably connected to the ends of the two fixing plates 711 far from the head rod 2 through bearings, the rotating bar 713 is symmetrically fixed at both ends of the third rotating shaft 712, the main cover plate 714 is fixed at one end of the two rotating bars 713 far from the third rotating shaft 712, the auxiliary cover plate mechanism 715 is rotatably connected to the middle of the main cover plate 714 through bearings, the main cover plate 714 is located right above the sieving bucket 4, the first torsion spring 716 is fixed at the middle of the third rotating shaft 712, one end of the first torsion spring 716 far from the third rotating shaft 712 is fixed to the surface of one fixing plate 711 on one side, driven gears 717 are symmetrically fixed at two ends of the third rotating shaft 712, the second rotating shaft 719 is rotatably connected to one end, close to the mounting plate 54, of the head rod 2 through a bearing, a speed reduction motor 7110 is fixed at one side, close to one end of the second rotating shaft 719, of the head rod 2, one end of the second rotating shaft 719 is fixed with the output end of the speed reduction motor 7110, driving half gears 718 are symmetrically fixed at two ends of the second rotating shaft 719, and the driving half gears 718 are in meshed connection with the driven gears 717.

Referring to fig. 7, a reinforcing plate 8 is fixed at one end of each of the two rotation bars 713 near the main cover plate 714, and one side of the reinforcing plate 8 is fixed to the surface of the main cover plate 714, so that the connection strength between the rotation bars 713 and the cover plate can be improved.

Referring to fig. 6 and 8, the sub-cover plate mechanism 715 includes a rotating rod 7151, a sub-cover plate 7152, a second torsion spring 7153 and a baffle 7154, the rotating rod 7151 is rotatably connected to a middle portion of the side of the main cover plate 714 far away from the rotating bar 713 through a bearing, the sub-cover plate 7152 is fixed to the middle portion of the rotating rod 7151, the second torsion spring 7153 is symmetrically fixed to two ends of the rotating rod 7151, one end of the second torsion spring 7153 far away from the rotating rod 7151 is fixed to the surface of the main cover plate 714, the baffle 7154 is symmetrically fixed to one side of the main cover plate 714, and the sub-cover plate 7152 is in pressing contact with the surface of the baffle 7154.

Note that the elastic force of the first torsion spring 716 is much larger than that of the second torsion spring 7153.

It should be further noted that the protection mechanism 7 can perform protection work simultaneously when the screening and crushing work is performed on the screening bucket 4, and compared with the traditional screening bucket 4, the probability that stones are broken out from the screening bucket 4 can be effectively reduced when the screening and crushing work is performed, so that the risk of construction workers during operation can be effectively reduced, and the probability that the glass window of the excavator operating room is damaged by broken stones can be effectively reduced.

It should also be noted that the angle of the sieving bucket 4 at this time is the extreme position of the turning bucket rotation, i.e. the sieving bucket 4 is at the right angle for the crushing and sieving operation at this time.

Referring to fig. 8, the reinforcing sleeve 9 is symmetrically fixed on the inner side of the main cover plate 714, and the rotating rod 7151 is rotatably connected to the inner wall of the reinforcing sleeve 9 through a bearing, so that the stability of the connection between the rotating rod 7151 and the main cover plate 714 can be improved.

Referring to fig. 7, 11, 12 and 13, the locking mechanism 72 includes a locking disc 721, a locking hole 722, a sliding sleeve 723, a limiting rod 724, a third spring 725 and a cam 726, the two ends of the third rotating shaft 712 are symmetrically fixed with the locking disc 721, one side of the outer wall of the locking disc 721 is provided with the locking hole 722, the two sides of the head rod 2 near one end of the locking disc 721 are symmetrically fixed with the sliding sleeve 723, the inner wall of the sliding sleeve 723 is connected with the limiting rod 724 in a sliding manner, the limiting rod 724 is matched with the locking hole 722, one end of the limiting rod 724 near the locking disc 721 is fixed with the third spring 725, one end of the third spring 725 far from the limiting rod 724 is fixed with the outer wall of the sliding sleeve 723, the two ends of the second rotating shaft 719 are symmetrically fixed with the cam 726, and one end of the limiting rod 724 near the cam 726 is connected with the surface of the cam 726 in a rolling manner.

It should be noted that, after the screening bucket 4 finishes the screening work, the decelerating motor 7110 is driven to rotate so as to separate the driving half gear 718 from the driven gear 717, the decelerating motor 7110 stops rotating, and then the main cover plate 714 is rotated to be tightly abutted against the head rod 2 under the rotating force of the first torsion spring 716, and then the decelerating motor 7110 is driven to rotate again, so that the third rotating shaft 712 can be locked by the locking mechanism 72, and thus the stability of the main cover plate 714 folded on the head rod 2 is improved.

Referring to fig. 12, one end of the limiting rod 724 close to the cam 726 is rotatably connected with the roller 10 through a shaft pin, the roller 10 is in rolling connection with the surface of the cam 726, and the cam 726 is in pressing contact with the surface of the roller 10, so that the friction between the limiting rod 724 and the cam 726 can be reduced.

Referring to fig. 3, reinforcing ribs 11 are symmetrically fixed on one side of the screening bucket 4 close to the mounting plate 54, and one side of each reinforcing rib 11 is fixed on the surface of the mounting plate 54, so that the connecting strength between the screening bucket 4 and the mounting plate 54 can be improved.

Referring to fig. 14, the present invention also provides a method for remediating contaminated soil in soil remediation, which includes the steps of:

The working principle of the polluted soil remediation device and the remediation method in the land remediation provided by the invention is as follows:

when the screening bucket 4 is used, the large soil in the screening bucket 4 is crushed by driving the crushing and screening component 6 to form the granular soil, the small granular soil can pass through the crushing and screening component 6 to leak out from the screening bucket 4, the remaining large stone exists in the screening bucket 4, and then the screening bucket 4 is driven to rotate to pour out the large stone, the second hydraulic cylinder 51 is driven to contract, the connecting plate 53, the mounting plate 54, the head rod 2 and the connecting rod 56 can form a quadrangle, the mounting plate 54 can be driven to rotate around the shaft pin under the driving of the contraction of the second hydraulic cylinder 51 through the principle of a quadrangle motion mechanism, so that the screening bucket 4 is driven to rotate around the shaft pin, the stone is poured out from the screening bucket 4, and when the screening bucket 4 starts to rotate, the second rotating shaft 719 is driven to rotate by driving the reducing motor 7110, the second rotating shaft 719 can rotate to drive the two driving half gears 718 to rotate, so as to drive the driven gear 717 to rotate, so as to drive the third rotating shaft 712 to rotate, so as to drive the rotating bar 713 to rotate, so as to drive the main cover plate 714 to rotate towards one side close to the head rod 2, and in the process of rotating the main cover plate 714, after the auxiliary cover plate 7152 contacts with the head rod 2, the main cover plate 714 can also continue to rotate, and the auxiliary cover plate 7152 is tightly attached to the lower surface of the head rod 2 under the action of the second torsion spring 7153, so that the main cover plate 714 continues to rotate to the two sides of the head rod 2, at this time, the driving half gear 718 is just separated from the driven gear 717, the rotation of the reduction motor 7110 is stopped after the driving half gear 718 is separated from the driven gear 717, finally, under the elastic force of the first torsion spring 716, the main cover plate 714 is always tightly attached to the surface of the head rod 2, and the main cover plate 714 is always tightly attached to the surface of the head rod 2, at this time, the third rotating shaft 712 has rotated to the position where the locking hole 722 aligns with the limiting rod 724, and then the reducing motor 7110 is driven to rotate again, the second rotating shaft 719 is driven to rotate, and the cam 726 is driven to rotate continuously, so that the large radius side of the cam 726 rotates to the side close to the limiting rod 724, and the limiting rod 724 can be pushed to slide along the sliding sleeve 723 to the side close to the locking hole 722 by overcoming the elastic force of the third spring 725 after the roller 10 rolls to the outer wall of the large radius side of the cam 726, until the roller 10 rolls to the large radius side of the cam 726 completely, the limiting rod 724 can be inserted into the locking hole 722, so as to lock the third rotating shaft 712, thereby locking the position of the main cover plate 714, and further stopping the rotation of the reducing motor 7110, and thereafter the screening bucket 4 can continue to perform the excavating work by matching of the driving mechanism 5 and the excavator main body 1, after the next excavation is finished, the first hydraulic cylinder 3 is driven to enable the head rod 2 to be at the angle for carrying out screening work again, the second hydraulic cylinder 51 is driven to extend out, the screening bucket 4 is driven to rotate to the angle for carrying out screening, the speed reducing motor 7110 is driven to rotate reversely after the screening bucket 4 rotates to the screening work angle, so that the cam 726 can be driven to rotate, the outer wall of one side with the small radius of the cam 726 is in contact with the roller 10, the speed reducing motor 7110 stops rotating after the contact, the limiting rod 724 slides to one side close to the cam 726 along the sliding sleeve 723 under the action of resilience force of the third spring 725, the limiting rod 724 is separated and unlocked from the locking hole 722, the speed reducing motor 7110 is driven to rotate reversely after the unlocking, so that the driving half gear 718 and the driven gear 717 can be meshed, and finally the main cover plate 714 is rotated to cover the top of the screening bucket 4, when the main cover plate 714 rotates, the auxiliary cover plate 7152 can rotate to be pressed on the stop block under the action of the second torsion spring 7153, so that the screening bucket 4 is covered together with the main cover plate 714, screening work is carried out, and the operation is repeated to finish subsequent soil crushing and screening work;

according to the invention, the protection mechanism 7 can simultaneously perform protection work when the screening and crushing work is performed on the screening bucket 4, and can effectively reduce the probability of stones falling out of the screening bucket 4 when the screening and crushing work is performed, so that the safety performance during work is improved.

The circuits and controls involved in the present invention are prior art and will not be described in detail herein.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a pollute soil prosthetic devices in soil reclamation, includes excavator main part (1), its characterized in that, the one end of excavator main part (1) is rotated through the pivot and is connected with head rod (2), the one end that excavator main part (1) is close to head rod (2) is rotated through the pivot and is connected with first pneumatic cylinder (3), the end that stretches out of first pneumatic cylinder (3) is rotated through the pivot and is connected with the one end of head rod (2), screening scraper bowl (4) are installed to the one end that first pneumatic cylinder (3) were kept away from in head rod (2), drive mechanism (5) that are used for driving screening scraper bowl (4) rotation work are installed to the one end that head rod (2) are close to screening scraper bowl (4), broken screening subassembly (6) are installed to the inner wall of screening scraper bowl (4), protection mechanism (7) that are used for carrying out protection work when carrying out broken screening are installed to the bottom that head rod (2) are close to screening scraper bowl (4) one end, the protection mechanism (7) is composed of a cover plate mechanism (71) fixed on the head rod (2) and a locking mechanism (72) fixed at one end of the cover plate mechanism (71).

2. The soil remediation device for contaminated soil in soil remediation according to claim 1, wherein the driving mechanism (5) comprises a second hydraulic cylinder (51), a first rotating shaft (52), a connecting plate (53), a mounting plate (54) and a connecting rod (56), wherein one end of the head rod (2) close to the screening bucket (4) is rotatably connected with the second hydraulic cylinder (51) through a shaft pin, an extending end of the second hydraulic cylinder (51) is rotatably connected with the first rotating shaft (52) through a bearing, the middle part of the first rotating shaft (52) is rotatably connected with the connecting plate (53) through a bearing, one end of the connecting plate (53) far away from the first rotating shaft (52) is rotatably connected with the mounting plate (54) through a shaft pin, one end of the mounting plate (54) far away from the connecting plate (53) is rotatably connected with the end of the head rod (2) through a shaft pin, and two ends of the first rotating shaft (52) are rotatably connected with the connecting rod (56) through a bearing symmetry, two the one end that first pivot (52) was kept away from in connecting rod (56) all is connected through the pivot with the outer wall rotation of head pole (2), screening scraper bowl (4) are fixed with the bottom of mounting panel (54).

3. The polluted soil remediation device for land reclamation according to claim 2, wherein the cover plate mechanism (71) comprises fixing plates (711), a third rotating shaft (712), rotating strips (713), a main cover plate (714), an auxiliary cover plate mechanism (715), a first torsion spring (716), a driven gear (717), a driving half gear (718), a second rotating shaft (719) and a reduction motor (7110), the fixing plates (711) are symmetrically fixed at the bottom of the head rod (2) close to one end of the screening bucket (4), the third rotating shaft (712) is rotatably connected to one ends of the two fixing plates (711) far away from the head rod (2) through bearings, the rotating strips (713) are symmetrically fixed at two ends of the third rotating shaft (712), the main cover plate (714) is fixed to one ends of the two rotating strips (713) far away from the third rotating shaft (712), the auxiliary cover plate mechanism (715) is rotatably connected to the middle part of the main cover plate (714) through bearings, the main cover plate (714) is positioned right above the screening bucket (4), a first torsion spring (716) is fixed in the middle of the third rotating shaft (712), one end of the first torsion spring (716) far away from the third rotating shaft (712) is fixed with the surface of one fixing plate (711) on one side, driven gears (717) are symmetrically fixed at two ends of the third rotating shaft (712), the second rotating shaft (719) is rotatably connected to one end of the head rod (2) close to the mounting plate (54) through a bearing, a speed reducing motor (7110) is fixed on one side of the head rod (2) close to one end of the second rotating shaft (719), one end of the second rotating shaft (719) is fixed with the output end of the speed reducing motor (7110), two ends of the second rotating shaft (719) are symmetrically fixed with driving half gears (718), and the driving half gears (718) are meshed with driven gears (717).

4. A contaminated soil remediating apparatus in soil remediation according to claim 3, wherein a reinforcement plate (8) is fixed to one end of the two rotation bars (713) adjacent to the main cover plate (714), and one side of the reinforcement plate (8) is fixed to the surface of the main cover plate (714).

5. The polluted soil remediation device for land reclamation as recited in claim 3, wherein the auxiliary cover plate mechanism (715) comprises a rotating rod (7151), an auxiliary cover plate (7152), a second torsion spring (7153) and a baffle plate (7154), the rotating rod (7151) is rotatably connected to the middle of one side, away from the rotating strip (713), of the main cover plate (714) through a bearing, the auxiliary cover plate (7152) is fixed to the middle of the rotating rod (7151), the second torsion spring (7153) is symmetrically fixed to two ends of the rotating rod (7151), one end, away from the rotating rod (7151), of the second torsion spring (7153) is fixed to the surface of the main cover plate (714), the baffle plate (7154) is symmetrically fixed to one side of the main cover plate (714), and the auxiliary cover plate (7152) is in pressing contact with the surface of the baffle plate (7154).

6. A contaminated soil remediation device according to claim 5 wherein the inner side of the main cover plate (714) is symmetrically fixed with a reinforcing sleeve (9), and the rotating rod (7151) is rotatably connected with the inner wall of the reinforcing sleeve (9) through a bearing.

7. The polluted soil restoration device in land reclamation according to claim 3, wherein the locking mechanism (72) comprises a locking disc (721), a locking hole (722), a sliding sleeve (723), a limiting rod (724), a third spring (725) and a cam (726), the locking disc (721) is symmetrically fixed at two ends of the third rotating shaft (712), the locking hole (722) is formed in one side of the outer wall of the locking disc (721), the sliding sleeve (723) is symmetrically fixed at two sides of one end, close to the locking disc (721), of the head rod (2), the limiting rod (724) is connected to the inner wall of the sliding sleeve (723) in a sliding manner, the limiting rod (724) is matched with the locking hole (722), the third spring (725) is fixed at one end, close to the locking disc (721), of the third spring (725), one end, far away from the limiting rod (724), of the third spring (725) is fixed with the outer wall of the sliding sleeve (723), cams (726) are symmetrically fixed at two ends of the second rotating shaft (719), and one end, close to the cams (726), of the limiting rod (724) is in rolling connection with the surface of the cams (726).

8. The device for remediating contaminated soil in land reclamation as recited in claim 7, wherein one end of the limiting rod (724) adjacent to the cam (726) is rotatably connected with a roller (10) through a shaft pin, the roller (10) is in rolling connection with the surface of the cam (726), and the cam (726) is in pressing contact with the surface of the roller (10).

9. Contaminated soil remediation device according to claim 2 wherein the screening bucket (4) is symmetrically secured with reinforcing bars (11) on the side adjacent the mounting plate (54), one side of the reinforcing bars (11) being secured to the surface of the mounting plate (54).

10. The apparatus for remediating contaminated soil in soil remediation according to any one of claims 1 to 9, providing a method for remediating contaminated soil in soil remediation, comprising the steps of: