CN112916597B

CN112916597B - Stirring equipment for in-situ remediation of shallow contaminated soil

Info

Publication number: CN112916597B
Application number: CN202110217772.0A
Authority: CN
Inventors: 佟雪娇; 胡大海; 陈盟; 赵倩云; 袁彦辉; 王天磊; 刘津玉
Original assignee: Yuhuan Environment Technology Co ltd
Current assignee: Yuhuan Environment Technology Co ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2022-06-28
Anticipated expiration: 2041-02-26
Also published as: CN112916597A

Abstract

The invention discloses in-situ remediation stirring equipment for shallow contaminated soil, which comprises a flatcar, a telescopic arm, a stirring device, a first liftable positioning pile, a second liftable positioning pile and a driving wheel, wherein the telescopic arm is arranged on the flatcar and extends forwards; the head of the telescopic arm is connected with the stirring device, the tail of the telescopic arm is connected with the flatcar, and the positioning pile A and the positioning pile B are symmetrically arranged at the rear part of the flatcar and are in running fit with the flatcar. The soil conditioner can stir soil while moving, and adds medicine into the stirred soil through the medicine adding holes of the stirring device while stirring, so that the soil is repaired, and the operation efficiency is improved; the invention has simple structure, easy manufacture and low manufacturing cost, and does not need to be arranged on an engineering truck.

Description

Stirring equipment for in-situ remediation of shallow contaminated soil

Technical Field

The invention relates to the technical field of soil remediation, in particular to in-situ remediation stirring equipment for shallow contaminated soil.

Background

The soil in-situ remediation technology is a remediation technology for directly remediating the polluted soil on site in a polluted site without excavating the soil, and has the characteristics of low investment, easy operation and small influence on the surrounding environment.

In recent years, with the rapid development of national economy, the urbanization and capacity transfer process is gradually accelerated, and the removal of heavily polluted enterprises in cities and towns leads to the increase of the quantity of the left industrial wasteland. The soil on the industrial waste land is polluted by the left toxic and harmful substances due to the influence of the original production activities, and if the soil is directly utilized, not only can the surrounding ecological environment be influenced, but also the physical health of people living nearby can be seriously threatened.

Particularly, if the shallow soil is not timely and effectively repaired after being polluted by heavy metals and organic pollutants, the deep soil and the underground water are further polluted, so that the timely repair of the shallow soil is an effective way for reducing further soil and underground water pollution.

In general, a method for in-situ soil remediation includes the steps of extending a stirring device into soil, stirring the soil, and injecting a medicament into the soil while stirring to remediate the soil. These stirring devices are heavy and inconvenient to move when changing the working position, and thus are inefficient in situ remediation of soil.

In order to facilitate the movement of the stirring equipment, the stirring equipment can be arranged on a self-walking engineering truck, and the stirring equipment is driven by the engineering truck to transfer. However, these specialized engineering vehicles have high cost and complex structure, so the equipment investment is high.

Disclosure of Invention

The invention aims to provide stirring equipment for in-situ remediation of shallow contaminated soil, aiming at solving the defects in the in-situ remediation technology of shallow soil.

In order to realize the purpose, the technical scheme adopted by the invention is as follows:

a stirring device for in-situ remediation of shallow contaminated soil comprises a flatcar, a telescopic arm, a stirring device, a first liftable positioning pile, a second liftable positioning pile and a driving wheel, wherein the telescopic arm is arranged on the flatcar and extends forwards, the stirring device is vertically arranged at the head of the telescopic arm, the first liftable positioning pile is vertically arranged at the rear part of the flatcar in a penetrating manner, the second liftable positioning pile is vertically arranged at the rear part of the flatcar in a penetrating manner, and the driving wheel is arranged at the front end of the flatcar and is used for driving the flatcar to rotate along the first or second positioning pile; the head of the telescopic arm is connected with the stirring device, the tail of the telescopic arm is connected with the flatcar, and the positioning piles A and B are symmetrically arranged at the rear of the flatcar and are in running fit with the flatcar.

Further, all the cover has the worm wheel on spud pile first and the spud pile second, and two worm wheels all rotate with the flatcar and be connected, spud pile first and spud pile second all with correspond between the worm wheel for sliding fit and through the feather key connection, two worm wheels all mesh there is the worm, worm and the worm wheel that corresponds all are equipped with clutch, the worm all is equipped with and is used for driving its pivoted motor.

Furthermore, the lower parts of the positioning pile A and the positioning pile B are both spiral.

Further, agitating unit includes vertical stirring head, sets up and be used for driving its rotatory hydraulic motor and the vertical pneumatic cylinder first of setting between hydraulic motor and flexible arm above the stirring head, pneumatic cylinder first one end links to each other with flexible arm head, the other end and hydraulic motor fixed connection, hydraulic motor is connected with the hydraulic pressure station that sets up on the flatcar.

Furthermore, the stirring head is cage-shaped and comprises a horizontal disc, spiral rib plates uniformly distributed on the outer circle of the disc and a stirring shaft vertically penetrating and fixedly arranged along the center of the disc, the upper parts of the rib plates are fixedly connected with the disc, and the stirring shaft is detachably connected with a driving shaft of a hydraulic motor.

The stirring shaft is of a hollow structure, the bottom of the stirring shaft is blocked, a dosing hole is formed in the part, located below the disc, of the stirring shaft, and the stirring shaft is connected with the liquid storage tank.

Furthermore, the bottom of the rib plate is spherical, and the outer surface and the soil facing surface of the rib plate are both provided with conical teeth.

Furthermore, the number of the stirring heads is two, the rotation directions of the two stirring heads are opposite, and the rotation directions of the rib plates on the two stirring heads are opposite.

Furthermore, the clutch device comprises a flat plate which is arranged below the worm and is in rotary connection with the worm and a hydraulic cylinder C for pushing the flat plate to move along the radial direction of the worm wheel.

The invention has the positive effects that:

1. the invention is provided with a flat car, wherein a telescopic arm is arranged on the flat car, a stirring device is arranged at the left end of the telescopic arm, a positioning pile A and a positioning pile B are vertically arranged at the right part of the flat car in a penetrating manner, and a driving wheel is arranged at the left end of the flat car; the positioning piles A and the positioning piles B are alternately driven downwards into soil, the driving wheel drives the stirring device to sweep in a fan shape along the driven positioning piles A or the driven positioning piles B, and the stirring device simultaneously stirs the shallow soil, so that the soil is stirred while moving, and the soil is fed with chemicals through the chemical feeding holes of the stirring device during stirring, so that the shallow soil is repaired, and the operation efficiency is improved; the invention has simple structure, easy manufacture and low manufacturing cost, does not need to be arranged on an engineering truck, can enter and exit an operation site in a traction mode and is convenient for transition.

2. The stirring device comprises a cage-shaped stirring head A and a stirring head B, the stirring head A and the stirring head B are both provided with eight spiral rib plates, and the rib plates are provided with teeth; under the action of the teeth, soil is easily crushed and enters the stirring head A and the stirring head B, and is uniformly stirred under the action of the rib plates and the teeth.

3. The stirring shafts of the stirring head A and the stirring head B are provided with dosing holes, so that the soil can be stirred and dosing operation can be completed.

Drawings

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

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a first schematic structural view of a stirring head;

FIG. 4 is a second schematic structural view of the stirring head;

FIG. 5 is a schematic diagram of the operation of the present invention in situ soil agitation;

in the figure, 1, a drive shaft; 2. a hydraulic motor; 3. a hydraulic cylinder A; 4. a telescopic arm; 5. a drive wheel; 6. a hydraulic cylinder B; 7. a pipeline; 8. a liquid storage tank; 9. positioning a pile I; 10. a worm gear; 11. positioning a pile B; 12. flatcar; 13. a stirring head B; 14. stirring the head first; 15. teeth; 16. a rib plate; 17. a disc; 18. a medicine adding hole; 19. a conical cap; 20. a connecting plate; 21. a stirring shaft; 22. a worm.

Detailed Description

As shown in fig. 1 and 2, the stirring equipment for in-situ remediation of shallow contaminated soil comprises a rectangular flat car 12, a telescopic arm 4 which is arranged on the top surface of the flat car 12 and extends towards the left, a stirring device which is vertically arranged at the left end of the telescopic arm 4, a cylindrical positioning pile A9 which is vertically arranged at the right part of the flat car 12 in a liftable and lowerable manner and vertically penetrates through the cylindrical positioning pile B11 which is arranged at the right part of the flat car 12 in a liftable manner, and a driving wheel 5 which is arranged at the left end of the flat car 12 and is used for driving the flat car 12 to rotate along the positioning pile A9 or the positioning pile B11.

After the positioning pile nail 9 is driven into soil downwards, the driving wheel 5 drives the flat car 12, the telescopic arm 4 and the stirring device connected with the telescopic arm 4 to sweep in a fan shape along the positioning pile nail 9, and the stirring device stirs shallow soil. Under the additional action of the telescopic arm 4, the stirring device is swept into a fan shape. After the stirring equipment rotates to be 180 degrees with the initial position, the positioning pile A9 is lifted, the positioning pile B11 is driven down, the operation is repeated, the stirring equipment can move for a certain distance, and the distance is the distance between the positioning pile A9 and the positioning pile B11. In this way, the spud a 9 and the spud b 11 are driven alternately into the soil, and the stirring device stirs the soil while moving along the operation trajectory shown in fig. 5.

The invention has simple structure, easy manufacture and low manufacturing cost, completes the movement of the stirring equipment while stirring, and does not need to be arranged on an engineering truck. The invention can enter and exit the operation field in a traction mode, and the transition is convenient.

The left part of spud first 9 and spud second 11 front and back symmetry setting at flatcar 12, spud first 9 and spud second 11 all set up on the axis of two rear wheels of flatcar 12. The telescopic arm 4 is driven by hydraulic pressure, the left end of the telescopic arm is connected with the top of the stirring device, and the right end of the telescopic arm is hinged with the middle of the flat car 12. Two hydraulic cylinders B6 used for enabling the left part of the telescopic arm 4 to swing up and down are symmetrically arranged between the telescopic arm 4 and the flat car 12. And the positioning pile A9 and the positioning pile B1 are in running fit with the flatcar 12. The lower parts of the positioning pile A9 and the positioning pile B11 are both in a spiral shape.

Drive wheel 5 rotates with flatcar 12 to be connected, the axis of drive wheel 5 is perpendicular with flatcar 12 left end face, the equipartition has the pinion rack of the rectangle that is used for increasing its and soil frictional force on the 5 excircles of drive wheel, the pinion rack all welds with drive wheel 5. And a speed reducing motor in transmission connection with the driving wheel 5 is fixedly connected to the bottom surface of the left part of the flat car 12.

All the cover has worm wheel 10 on spud first 9 and spud second 11, worm wheel 10 all rotates with flatcar 12 to be connected, spud first 9 and spud second 11 all with the worm wheel 10 that corresponds between for sliding fit and through the feather key connection, worm wheel 10 all is provided with worm 22 rather than the meshing on one side, all be equipped with clutch between worm 22 and the worm wheel 10 that corresponds, worm 22 all is equipped with and is used for driving its pivoted motor.

The clutch devices all comprise a flat plate arranged below the worm 22 and a hydraulic cylinder 23 used for pushing the flat plate to move along the radial direction of the worm wheel 10. Vertical lugs are welded at two ends of the corresponding worm 22 of the flat plate, two ends of the worm are rotatably connected with the corresponding lugs, a motor used for driving the worm to rotate is arranged at the right end of the worm 22, and the motor is fixedly connected with the flat plate through screws. Two tracks vertical to the worm 22 are symmetrically arranged below the flat plate, and the worm 22 is driven by the hydraulic cylinder 23 to move along the radial direction of the worm wheel 10, so that the worm 22 and the corresponding worm wheel 10 are meshed or separated.

The worm 22 rotates the worm wheel 10, so that the positioning pile A9 or the positioning pile B11 can be conveniently drilled into the soil. The lower parts of the positioning pile A9 and the positioning pile B11 are spiral, so that the positioning pile A9 and the positioning pile B11 are reliably connected after being drilled into soil and are not easy to loosen.

Agitating unit is used for driving stirring first 14 and the rotatory hydraulic motor 2 of stirring first 13 and the vertical pneumatic cylinder first 3 of setting between hydraulic motor 2 and flexible arm 4 above stirring first 14 and stirring first second 13 that stirring first 14, the vertical setting of setting include vertical setting, pneumatic cylinder first 3 upper end is articulated with flexible arm 4 left end portion, lower extreme and 2 fixed connection of hydraulic motor, hydraulic motor 2 has two decurrent drive shafts 1, stirring first 14 and stirring first second 13 can be dismantled with the drive shaft 1 that corresponds respectively and be connected, hydraulic motor 2 is connected with the hydraulic pressure station of setting on flatcar 12.

As shown in fig. 3 and 4, the first stirring head 14 and the second stirring head 13 are all in an integrated cage shape made of manganese steel, the first stirring head 14 and the second stirring head 13 both include a horizontal disc 17, eight helical rib plates 16 uniformly distributed on the outer circle of the disc 17, and a stirring shaft 21 vertically arranged along the center of the disc 17 in a penetrating manner, the stirring shafts 21 of the first stirring head 14 and the second stirring head 13 are respectively in threaded connection with the corresponding driving shafts 1, the rotation directions of the rib plates 16 of the first stirring head 14 and the rib plates 16 of the second stirring head 13 are opposite, and the rotation directions of the first stirring head 14 and the second stirring head 13 are opposite.

The rotating directions of the stirring head A14 and the stirring head B13 are opposite, so that the torques acted on the hydraulic motor 2 are mutually offset, the torque acted on the telescopic arm 4 is reduced, and the telescopic arm 4 is prevented from shaking in work.

The stirring shaft 21 is of a hollow structure, the bottom of the stirring shaft is provided with a conical cap 19 for plugging the lower end of the stirring shaft, and a connecting plate 20 is arranged between the conical cap 19 and the bottom end of the corresponding rib plate 16. The part of the stirring shaft 21 below the disc 17 is provided with a dosing hole 18, the bottom of the rib plate 16 is spherical, and the outer surface and the soil facing surface of the rib plate 16 are both provided with conical teeth 15. The rib plates 16 on the spherical surface enable the stress to be more uniform, and damage caused by local overlarge stress is avoided.

As shown in fig. 1, the driving shaft 1 is also hollow, the flatcar 12 is further provided with a liquid storage tank 8, and the liquid storage tank 8 is filled with liquid medicine for soil improvement. The liquid storage tank 8 is connected with the driving shaft 1 through a pipeline 7, and a dosing pump is arranged on the pipeline 7.

The working process of the invention is as follows:

1. the worm 22 drives the worm wheel 10 to rotate, the positioning pile nail 9 is drilled into the soil, and then the corresponding hydraulic cylinder 23 acts to separate the worm 22 from the worm wheel;

2. the telescopic arm 4 extends out, the hydraulic motor 2 drives the stirring head A14 and the stirring head B13 to rotate, and the hydraulic cylinder A3 drives the stirring head A14 and the stirring head B13 to drill downwards into soil;

3. The driving wheel 5 drives the flat car 12, the telescopic arm 4, the stirring head A14 and the stirring head B13 to sweep in a fan shape by taking the positioning pile A9 as the center, liquid medicine in the liquid storage tank 8 is added into the soil being stirred through the medicine adding hole 18 during sweeping, and after one-time sweeping is completed, the telescopic arm 4 retracts, so that the sweeping area is enlarged;

4. after the first stirring head 14 and the second stirring head 13 move to the direction 180 degrees away from the initial position, the worm 22 drives the worm wheel 10 to rotate, the positioning pile B11 is drilled into the soil, and the positioning pile A9 is lifted out of the soil;

5. the driving wheel 5 drives the flat car 12, the telescopic arm 4, the stirring head A14 and the stirring head B13 to sweep in a fan shape by taking the positioning pile B13 as a center, and the telescopic arm 4 performs corresponding actions during sweeping so as to enlarge the sweeping area;

6. the positioning piles A9 and the positioning piles B11 alternately drill into the soil as shown in figure 5, and the stirring heads A14 and B13 sweep to form a working area as shown in figure 5.

The arrow on the right side in fig. 5 is the moving direction of the invention in operation, and the arrows on the dotted line and the dotted line are the sweeping track and the sweeping direction respectively.

In order to reduce the operation blind area and improve the stirring effect, the first stirring head 14 and the second stirring head 13 can increase the sweeping angle during sweeping.

Claims

1. The stirring equipment for in-situ remediation of shallow contaminated soil is characterized by comprising a flat car (12), a telescopic arm (4) which is arranged on the flat car (12) and extends forwards, a stirring device which is vertically arranged at the head of the telescopic arm (4), a first liftable positioning pile (9) which is vertically arranged at the rear part of the flat car (12) in a penetrating manner, a second liftable positioning pile (11) which is vertically arranged at the rear part of the flat car (12) in a penetrating manner, and a driving wheel (5) which is arranged at the front end of the flat car (12) and is used for driving the flat car (12) to rotate along the first liftable positioning pile (9) or the second positioning pile (11); the head of the telescopic arm (4) is connected with a stirring device, the tail of the telescopic arm is connected with a flat car (12), and the positioning pile A (9) and the positioning pile B (11) are symmetrically arranged at the rear part of the flat car (12) and are in running fit with the flat car (12); the stirring device comprises a vertical stirring head, a hydraulic motor (2) arranged above the stirring head and used for driving the stirring head to rotate, and a hydraulic cylinder A (3) vertically arranged between the hydraulic motor (2) and a telescopic arm (4), wherein one end of the hydraulic cylinder A (3) is connected with the head of the telescopic arm (4), the other end of the hydraulic cylinder A is fixedly connected with the hydraulic motor (2), and the hydraulic motor (2) is connected with a hydraulic station arranged on a flat car (12); the stirring head is cage-shaped and comprises a horizontal disc (17), spiral rib plates (16) uniformly distributed on the excircle of the disc (17) and a stirring shaft (21) vertically penetrating and fixedly arranged along the center of the disc (17), the upper parts of the rib plates (16) are fixedly connected with the disc (17), and the stirring shaft (21) is detachably connected with a driving shaft (1) of a hydraulic motor (2);

The stirring shaft (21) is of a hollow structure, the bottom of the stirring shaft is blocked, a dosing hole (18) is formed in the part, located below the disc (17), of the stirring shaft (21), and the stirring shaft (21) is connected with the liquid storage tank (8);

soil is squeezed into downwards in turn in spud pile first (9) and spud pile second (11), and drive wheel (5) drive agitating unit and carry out fan-shaped sweeping along spud pile first (9) or spud pile second (11) of digging, and agitating unit stirs shallow soil simultaneously to remove while stirring soil, add the medicine in the soil in to the stirring through agitating unit's the hole of adding medicine (18) again in the stirring when stirring, carry out the restoration of shallow soil.

2. The in-situ repair stirring equipment for shallow contaminated soil according to claim 1, wherein the locating pile A (9) and the locating pile B (11) are sleeved with worm gears (10), the two worm gears (10) are rotationally connected with the flat car (12), the locating pile A (9) and the locating pile B (11) are in sliding fit with the corresponding worm gears (10) and are connected through sliding keys, the two worm gears (10) are meshed with the worm (22), the worm (22) and the corresponding worm gears (10) are provided with clutch devices, and the worm (22) is provided with a motor for driving the rotation of the worm gears.

3. The in-situ repair stirring device for shallow polluted soil according to claim 1, wherein the lower parts of the positioning piles A (9) and B (11) are both in a spiral shape.

4. The in-situ remediation stirring device for shallow contaminated soil according to claim 1, wherein the bottom of the rib plate (16) is spherical, and the outer surface and the soil-facing surface of the rib plate (16) are provided with conical teeth (15).

5. The in-situ remediation stirring device for shallow contaminated soil according to claim 1, wherein the number of the stirring heads is two, the rotation directions of the two stirring heads are opposite, and the rotation directions of the rib plates (16) on the two stirring heads are opposite.

6. The in-situ remediation stirring apparatus for shallow contaminated soil according to claim 2, wherein the clutch device comprises a flat plate disposed below the worm (22) and a hydraulic cylinder (23) for pushing the flat plate to move along the radial direction of the worm wheel (10).