CN115178580B - Even-axis multi-stage high-pressure stirring liquid spraying device - Google Patents
Even-axis multi-stage high-pressure stirring liquid spraying device Download PDFInfo
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- CN115178580B CN115178580B CN202110353918.4A CN202110353918A CN115178580B CN 115178580 B CN115178580 B CN 115178580B CN 202110353918 A CN202110353918 A CN 202110353918A CN 115178580 B CN115178580 B CN 115178580B
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- 238000003756 stirring Methods 0.000 title claims abstract description 92
- 238000005507 spraying Methods 0.000 title claims abstract description 28
- 239000007788 liquid Substances 0.000 title claims abstract description 27
- 239000002689 soil Substances 0.000 claims abstract description 64
- 238000002347 injection Methods 0.000 claims abstract description 21
- 239000007924 injection Substances 0.000 claims abstract description 21
- 238000005553 drilling Methods 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 238000005067 remediation Methods 0.000 claims description 15
- 238000011065 in-situ storage Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 238000013019 agitation Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000002270 dispersing agent Substances 0.000 claims description 2
- 238000004891 communication Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 9
- 230000006641 stabilisation Effects 0.000 description 7
- 238000011105 stabilization Methods 0.000 description 7
- 239000003814 drug Substances 0.000 description 6
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 235000015278 beef Nutrition 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 239000003864 humus Substances 0.000 description 1
- 231100001240 inorganic pollutant Toxicity 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002901 radioactive waste Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/20—Arrangements for agitating the material to be sprayed, e.g. for stirring, mixing or homogenising
- B05B15/25—Arrangements for agitating the material to be sprayed, e.g. for stirring, mixing or homogenising using moving elements, e.g. rotating blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention provides an even-axis multistage high-pressure stirring liquid spraying device having such characteristics that it comprises: a pile driving frame; the even number of drill bit parts are symmetrically arranged at the bottom of the pile driving frame; a conveying section including a first conveying path and a second conveying path for conveying soil restoration components; and an injection part including a plurality of nozzles, in communication with the injection part, for injecting the soil restoration component into the soil. The even-axis multi-stage high-pressure stirring and spraying device has even drill bit parts which are symmetrically arranged at the bottom of the pile driving frame, so that the acting forces on two sides of the even-axis multi-stage high-pressure stirring and spraying device are uniformly distributed when the even-axis multi-stage high-pressure stirring and spraying device works, the pile driving frame cannot be subjected to counter torsion, and the production safety is ensured.
Description
Technical Field
The invention relates to a stirring device, in particular to an even-axis multi-stage high-pressure stirring liquid spraying device.
Background
In situ solidification/stabilization is a relatively mature waste disposal technology, which has been successfully applied to the harmless and recycling of contaminated soil, radioactive waste, sediment and industrial sludge through decades of research. Compared with other technologies, the technology has obvious repairing effect on most inorganic pollutants and some organic pollutants, has obvious advantages in repairing refractory and mixed pollution sites, and has the advantages of short treatment time, wide application range and simple and easily obtained devices and materials.
The form of the in situ curing/stabilizing equipment is varied and the nature of the contaminants and the conditions in the field affect the choice of the type of curing/stabilizing equipment, such as the depth and geometry of the target contaminated media, the subsurface ruins, tight soil layers, buildings, railroads, utilities and other structures, surface waters, etc. The effect of various parameters of the repairing equipment is obviously influenced, and the repairing equipment mainly comprises effective action depth, stirring speed, medicament diffusion efficiency, treatment rate, stirring time and the like.
In the prior art, in-situ curing/stabilizing equipment mainly comprises: high-speed rotation stabilization equipment, high-pressure rotary jetting equipment, rotary mixers, excavator buckets, hollow fork injection equipment and the like.
The high-speed rotational stabilization device is capable of mixing the solidifying/stabilizing agent with the soil or sludge by the rotational action of a stirring head equipped with blades or teeth. The equipment is suitable for treating soil and sludge with high solid content, and can mix and stir target media in an in-situ target area. The use process of the device comprises the following steps: early stage soil excavation, layering, conditioning, solidification and stabilization. The solidifying/stabilizing agent can be directly sent to the periphery of the stirring head by pneumatic or hydraulic pressure, and the mixing operation is directly carried out. In addition to the mixing and stirring system, the in situ curing/stabilizing apparatus also requires a set of grouting equipment, mainly comprising storage silos, meters, mixing equipment and pumps.
The high-pressure rotary spraying device can inject the medicament into a target medium by a special rotary drill rod through high pressure (40 MPa), and the device is particularly suitable for in-situ solidification/stabilization treatment processes with larger depth, wherein the treatment depth can reach 30m, and the effective diameter is 0.6-1.8 m. The water-to-solid ratio, the composition of the binder and filler, and the amount of cement slurry in the grout affect the ultimate strength of the post-treatment earth column and the permeability of the contaminants. Spin-injection grouting is well suited for use in the solidification stabilization of isolated media or contaminated soil, as well as the solidification stabilization of target media beneath permanent structures. The high-speed grouting device is an improved double-liquid jet grouting system, and the device can enlarge the influence radius (3-5 m) of jet grouting. This device is capable of injecting cement slurry into the target medium through a horizontal nozzle at a very high rate of about 200m/s. At such high energy injection rates, the structure of the target medium is disturbed, thereby achieving efficient mixing of the medicament and the target medium.
However, the rotary jet drills applied to soil remediation in the devices adopt a single drill bit for drilling, perforating, stirring and medicament injection, and the drill bit has small volume, so that the remediation radius of the drill bit is limited, and the rotary drilling and the continuous deep operation of the drill bit are not facilitated. The high pressure jet grouting equipment has a slightly poorer jet grouting quality and sometimes even has no better effect than static grouting for humus soil with oversized gravel diameter, excessive gravel content and a large amount of fiber.
Disclosure of Invention
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an even-axis multi-stage high-pressure stirring/spraying device which is efficient and safe and can uniformly mix contaminated soil and a chemical.
The present invention provides an even-axis multistage high-pressure stirring liquid spraying device having such characteristics that it comprises: a pile driving frame; the even number of drill bit parts are symmetrically arranged at the bottom of the pile driving frame, and each drill bit part comprises at least three stages of stirring blade groups; a conveying section including a first conveying path and a second conveying path for conveying soil restoration components; and an injection portion including a plurality of nozzles in communication with the injection portion for injecting a soil remediation composition into the soil, wherein each nozzle includes: one end of the nozzle inner tube is communicated with the first conveying channel, and an inner tube outlet is formed at the other end of the nozzle inner tube; a first injection passage formed inside the nozzle inner tube for injecting the soil restoration component conveyed by the first conveying passage into the soil; the nozzle outer tube is sleeved outside the nozzle inner tube, one end of the nozzle outer tube is communicated with the second conveying channel, and an outer tube outlet is formed at the other end of the nozzle outer tube; and a second injection passage formed between the outer wall of the nozzle inner tube and the inner wall of the nozzle outer tube for injecting the soil restoration component conveyed by the second conveying passage into the soil
In the even-axis multi-stage high-pressure agitating-liquid ejecting apparatus provided by the present invention, it may further have the feature that: wherein each bit portion comprises: the drill rod is hollow, one end of the drill rod is arranged at the bottom of the pile driving frame, and the other end of the drill rod extends in a direction away from the pile driving frame; and the power head is arranged at one end of the drill rod, which is far away from the pile driving frame.
In the even-axis multi-stage high-pressure agitating-liquid ejecting apparatus provided by the present invention, it may further have the feature that: wherein each stage of the stirring blade group comprises: and a plurality of stirring blades which are sequentially arranged on the outer surface of the drill rod along the length direction of the drill rod.
In the even-axis multi-stage high-pressure agitating-liquid ejecting apparatus provided by the present invention, it may further have the feature that: wherein the number of stages of the stirring vane group is at least three.
In the even-axis multi-stage high-pressure agitating-liquid ejecting apparatus provided by the present invention, it may further have the feature that: wherein each stage of stirring blade group comprises at least one stirring blade with drilling teeth.
In the even-axis multi-stage high-pressure agitating-liquid ejecting apparatus provided by the present invention, it may further have the feature that: wherein, along the length direction of drilling rod, from being close to the one end of piling bar to keeping away from the one end of piling bar, stirring vane's stirring diameter reduces in proper order in the stirring vane group.
In the even-axis multi-stage high-pressure agitating-liquid ejecting apparatus provided by the present invention, it may further have the feature that: the included angle between the plane where the stirring blade is positioned and the axis of the drill rod is alpha, wherein alpha is not equal to 0 degree or 90 degrees.
In the even-axis multi-stage high-pressure agitating-liquid ejecting apparatus provided by the present invention, it may further have the feature that: wherein, be provided with a plurality of installation units that are used for installing the nozzle on the drilling rod, the installation unit forms on the drilling rod is located the region between two adjacent stirring vane of same one-level.
In the even-axis multi-stage high-pressure agitating-liquid ejecting apparatus provided by the present invention, it may further have the feature that: wherein, soil remediation composition includes: a liquid soil remediation agent; and a diffusing agent for diffusing the liquid soil remediation agent in the soil.
In the even-axis multi-stage high-pressure agitating-liquid ejecting apparatus provided by the present invention, it may further have the feature that: wherein, the conveying part still includes: the conveying pipe is arranged in the drill rod and extends along the length direction of the drill rod, a first conveying channel is formed in the conveying pipe, and a second conveying channel is formed between the outer wall of the conveying pipe and the inner wall of the drill rod; a high-pressure pump for delivering a liquid soil remediation composition to the first delivery channel or the second delivery channel; and an air compressor for generating and delivering high-pressure air as a diffusion agent to the first delivery passage or the second delivery passage.
In the even-axis multi-stage high-pressure agitating-liquid ejecting apparatus provided by the present invention, it may further have the feature that: wherein, the drill part is shown to further comprise: and the hoop is sleeved on the drill rod and is used for guiding the drill rod.
Effects and effects of the invention
According to the even-axis multi-stage high-pressure stirring and spraying device, since the even-axis multi-stage high-pressure stirring and spraying device is provided with the even-numbered drill bit parts and the even-numbered drill bit parts are symmetrically arranged at the bottom of the pile driving frame, acting forces on two sides of the even-axis multi-stage high-pressure stirring and spraying device can be mutually counteracted when the even-axis multi-stage high-pressure stirring and spraying device works, so that the whole device has excellent working stability.
Further, since the nozzle has the nozzle inner tube and the nozzle outer tube, the soil restoration component can be sufficiently mixed in the soil to be restored with high efficiency.
Drawings
FIG. 1 is a schematic view showing the structure of an even-axis multistage high-pressure agitation liquid-spraying apparatus in an embodiment of the present invention;
FIG. 2 is a perspective cross-sectional view of a drill bit in an embodiment of the present invention;
FIG. 3 is an enlarged partial view of area A of FIG. 2;
FIG. 4 is a schematic view of another bit profile;
FIG. 5 is a schematic view of the structure of a nozzle in an embodiment of the invention; and
Fig. 6 is a cross-sectional view of a nozzle in an embodiment of the invention.
Detailed Description
In order to make the technical means, the creation features, the achievement of the purpose and the effect of the present invention easy to understand, the present invention is specifically described below with reference to the embodiments and the drawings.
< Example >
The embodiment provides an even-axis multi-stage high-pressure stirring and spraying device for spraying soil restoration components on deep soil so as to perform in-situ restoration. In this embodiment, the soil remediation composition includes a liquid soil remediation agent and a dispersing agent that aids in the dispersion of the soil remediation agent in the soil. Specifically, the diffusing agent is compressed air in this embodiment.
FIG. 1 is a schematic view showing the structure of an even-axis multistage high-pressure agitation liquid-spraying apparatus in an embodiment of the present invention. Fig. 2 is a perspective cross-sectional view of a drill bit in an embodiment of the invention.
As shown in fig. 1 to 2, the even-axis multi-stage high-pressure agitating-spray apparatus 100 provided in this embodiment includes: pile driving frame 10, drill bit 20, conveying section 30, and injection section 40.
Pile driving frame 10 is fixedly arranged in an area where in-situ soil restoration is required. In the embodiment, the pile driving frame is a universal long spiral pile driving frame, BL-32 type pile driving frame, the pile driving frame has the height of 39m, the width of 8m and the length of 13m, and the pile driving frame can bear the maximum torque of 250 kilonewtons meters.
The number of the drill bit parts 20 is 2, and the drill bit parts are symmetrically arranged at two ends of the pile driving frame 10 in a straight line shape. In this embodiment, the structure of the two drill bit sections 20 is identical. In other embodiments, the number of the drill parts 20 may be 2n (n is an integer greater than or equal to 1), and 2n drill parts 20 may be symmetrically installed at both ends of the pile driving frame 10 as in the present embodiment, n each.
Fig. 4 is a schematic view of another drill bit profile.
As shown in fig. 4, in another embodiment, the number of the drill parts 20 may be 2n+2m (n, m are integers equal to or greater than 1), and may be distributed in a zigzag shape. Specifically, 2n+2m drill bit portions 20 are distributed on a virtual quadrangle S located at the bottom of the pile driving frame 10, and a total of 2n drill bit portions 20 are provided on one pair of oppositely disposed sides of the virtual quadrangle S, n each side; the other pair of oppositely disposed sides is provided with a total of 2m drill bit sections 20, m on each side. Preferably, in this embodiment, the center point of the virtual quadrangle S coincides with the center point of the bottom surface of the piling mast 10. Here, the virtual quadrangle S is a concept defined only for convenience of description, and does not need to actually exist at the bottom of the pile driver 10.
Each bit portion 20 includes: drill pipe 21, stirring vane 22, brill tooth 23, unit head 24, staple bolt 25.
The drill rod 21 is a hollow circular drill rod and is arranged at the bottom of the pile driving frame 10, and the drill rod 21 extends vertically downwards. In the present embodiment, the drill rod 21 isThe wall thickness of the universal round drill rod is 20mm, and the structural strength is 900 megapascals.
The stirring blades 22 include three-stage stirring blades, the number of each stage of stirring blades is 4, the structures of the three-stage stirring blades are basically the same, all the stirring blades 22 are plate-shaped and differ only in the stirring radius of each stage of blades, and the stirring diameters of the stirring blades 22 sequentially decrease from one end close to the pile driving frame 10 to one end far from the pile driving frame 10 along the length direction of the drill rod 21. In this embodiment, the first stage stirring blade has an outer diameter of phi 400mm, the second stage blade has an outer diameter of phi 800mm, and the third stage blade has an outer diameter of phi 1200mm.
The three-stage stirring blades 22 are sequentially arranged on the outer peripheral wall of the drill rod 21 along the length direction of the drill rod 21, and the stirring blades 22 in the same stage are arranged on the outer peripheral wall of the drill rod 21 in the same posture, and the plane where the stirring blades 22 are positioned and the axis of the drill rod 21 form a non-right angle included angle.
The drilling teeth 23 are arranged at the end of part of the stirring vane 22 remote from the drill rod 21 and are inclined with their tips facing downwards. In the present embodiment, only two stirring blades 22 of the four stirring blades 22 of each stage are provided with three mutually parallel drilling teeth 23 at the end portions. The two stirring blades 22 with the drilling teeth 23 are arranged axisymmetrically with respect to the axis of rotation of the drill rod 21. Such an arrangement ensures that the force remains uniform during operation of the drill bit 20 and thus the safety of the overall device.
The power head 24 is mounted at the end of the drill pipe 21 remote from the pile driving frame 10. In this embodiment, the power head 24 is a universal long spiral pile driving power head, the power of the power head is 150KW, the power head is driven by two 75KW ac motors in parallel, the maximum torque is 150 km, the rotation speed is 14r/min, and a high-pressure stirring jet liquid diverter can be arranged in the middle of the power head core tube.
A hoop 25 is provided around one end of each drill rod 21 adjacent the piling mast 10. The anchor ear 25 includes two semicircular anchor ear frames and semicircular beef tendon bushings respectively embedded inside the two semicircular anchor ear frames. The anchor ear 25 is used for embracing the drill rod, and enables the drill rod 21 to rotate in the anchor ear and slide up and down, thereby playing a role in guiding the drill rod and keeping the drill hole perpendicularity.
Fig. 2 is a perspective cross-sectional view of a drill bit in an embodiment of the invention. Fig. 3 is a partial enlarged view of the area a in fig. 2.
As shown in fig. 2 to 3, the conveying section 30 includes: a delivery pipe 31, a first delivery passage 32, a second delivery passage 33, a high-pressure pump (not shown in the figure), and an air compressor (not shown in the figure).
The conveying pipe 31 is a hollow rod, is provided inside the drill rod 21, and extends in the longitudinal direction of the drill rod 21.
A first delivery passage 32 is formed inside the delivery pipe 31, and in this embodiment, the first delivery passage 32 communicates with a high-pressure pump for delivering a soil restoration agent in a liquid state.
A second delivery channel 33 is formed between the outer wall of the delivery tube 31 and the inner wall of the drill rod 21, in this embodiment the second delivery channel 33 communicates with an air compressor for delivering compressed air as a diffusant. In other embodiments, the first delivery conduit 32 may also be used to deliver a diffusion agent and the second delivery conduit 33 may also be used to deliver a soil remediation agent.
The high-pressure pump is used for delivering liquid soil restoration agent into the first delivery pipeline 32, specifically, in this embodiment, a 3e160 type high-pressure rotary jet pump is selected, the power of a motor is 110KW, the pump capacity can reach 300L/min, and the pump pressure can reach 20MPa.
The air compressor is used for delivering compressed air into the second delivery pipe 33, specifically, a screw type general process air compressor is selected in this embodiment, the output air pressure is 1.2MPa, the gas yield is 9m 3/min, and the motor power is 75KW.
The injection unit 40 includes: mounting unit and nozzle 41.
The mounting unit comprises a drill rod mounting hole and a conveying pipe mounting hole.
The drill pipe mounting holes are formed in a region of the drill pipe 21 between two adjacent stirring blades 22 of each stage (hereinafter, this region is simply referred to as an a region for convenience of description), and 4 a regions are formed on the surface of the drill pipe 21 per stage of stirring blades, but not all a regions are formed with the drill pipe mounting holes, wherein only two a regions are oppositely disposed in 2 stages, and the drill pipe mounting holes are formed.
As is apparent from the above description, 6 drill rod mounting holes are distributed in total on the drill rod 21 in the present embodiment, and all the drill rod mounting holes are formed on two lines parallel to the axis of the drill rod 21. Such an arrangement may allow for a more uniform spray.
The pipe mounting hole is formed at a position of the pipe 31 corresponding to the drill rod mounting hole.
Fig. 5 is a schematic structural view of a nozzle in an embodiment of the present invention. Fig. 6 is a cross-sectional view of a nozzle in an embodiment of the invention.
As shown in fig. 5-6, the number of nozzles 41 corresponds to the number of drill rod mounting holes. Part of the structure of the nozzle 41 is located inside the drill rod 21, the other part of which is located. In the present embodiment, the point of the structure having the nozzle 41 located outside the drill rod 21 farthest from the surface of the drill rod 21 is L. The L point of the nozzle installed on the same level of drill rod installation hole is the same as the shortest distance s of the surface of the drill rod 21. The shortest distance between the L point of the nozzle closest to the piling block 10 and the surface of the drill rod 21 is s 1, the shortest distance between the L point of the nozzle next closest to the piling block 10 and the surface of the drill rod 21 is s 2, and the shortest distance between the L point of the nozzle farthest from the piling block 10 and the surface of the drill rod 21 is s3. In this embodiment, s 1＞s2＞s3. Through the arrangement, the long-distance delivery of soil restoration components can be realized, the energy attenuation of jet flow is reduced to the maximum extent, and the cutting and crushing efficiency is ensured.
In addition, as shown in fig. 2, in this embodiment, one nozzle 41 is located below the stirring blade 22 in each stage, which is advantageous in ensuring that the outlet of the nozzle 41 is not easily blocked.
Specifically, the nozzle 41 includes: a nozzle inner tube 411, a first injection channel 412, a nozzle outer tube 413, and a second injection channel 414.
The nozzle inner tube 411 has one end disposed at the delivery tube mounting hole and the other end extending out of the drill rod 21 through the drill rod mounting hole and forming an inner tube outlet. The outer diameter of the end of the nozzle inner tube 411 near the delivery tube mounting hole is matched with the diameter of the delivery tube mounting hole. The diameter of the portion of the nozzle inner tube 411 extending beyond the drill rod 21 is reduced relative to the diameter of the portion located within the drill rod 21.
A first injection passage 412 is formed inside the nozzle inner tube 411, communicating with the first delivery passage 32.
The nozzle outer tube 413 is sleeved on the outer side of the nozzle inner tube 411, one end of the nozzle outer tube is arranged at the drill rod mounting hole, and the other end of the nozzle outer tube penetrates out of the surface of the drill rod to extend outwards and is provided with an outer tube outlet. The outer diameter of the end of the nozzle outer tube 413 near the drill rod mounting hole matches the diameter of the drill rod mounting hole. The diameter of the outer nozzle tube 413 extending beyond the outer portion of the drill rod 21 is reduced relative to the diameter of the inner portion of the drill rod 21.
A second injection passage 414 is formed between the outer wall of the nozzle inner tube 411 and the inner wall of the nozzle outer tube 413, communicating with the second conveyance passage 33.
The method for using the even-axis multi-stage high-pressure stirring and spraying device 100 provided in this embodiment is as follows:
Step1, driving a drill bit part 10 into a target area;
Step 2, the drill bit portions 10 start stirring, in this embodiment, because the rotation speeds of the two drill bit portions 10 are the same, the directions are opposite, and the stirring diameters are the same, the torque of the whole device is automatically balanced by the power head, and the pile driving frame does not bear reactive torque;
And 3, after the soil in the target area is uniformly stirred, conveying the soil restoration component to the injection part 40 through the conveying part 30, cutting the crushed soil body by the liquid medicine jet sprayed by the injection part 40, uniformly doping the crushed soil body into the soil, and further stirring by the stirring blade to ensure that the medicament is fully contacted with the pollutant to achieve the optimal effect, thereby realizing the efficient restoration of the soil in the target area.
Effects and effects of the examples
According to the even-axis multi-stage high-pressure stirring and spraying device, because the even-axis multi-stage high-pressure stirring and spraying device is provided with the even-number drill bit parts and the even-number drill bit parts are symmetrically arranged at the bottom of the pile driving frame, the acting forces on two sides of the even-axis multi-stage high-pressure stirring and spraying device in the embodiment are distributed uniformly during working, reverse torsion can not be generated on the pile driving frame, and production safety is ensured.
Further, since the nozzle has the nozzle inner tube and the nozzle outer tube, the soil restoration component can be sufficiently mixed in the soil to be restored with high efficiency.
Further, as the stirring blades and the spike teeth are arranged on the drill rod, the device has a larger repairing radius, and can crush soil to the greatest extent, so that the mixing degree of the repairing agent and the soil is greatly improved.
Further, as the stirring blades are obliquely arranged on the drill rod, the cutting and stirring acting force of the drill bit on the soil body is improved, the problem of sundry winding is solved, and the rotary drilling and the continuous deep operation of the drill bit are facilitated.
Further, because the nozzles are positioned between adjacent stirring blades, the stirring blades are firstly contacted with the soil in the working process so as to squeeze the soil to other positions, thereby avoiding the nozzles from being contacted with the soil for a long time to increase abrasion.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (6)
1. An even-axis multistage high-pressure stirring and spraying device for in-situ remediation of deep soil, which is characterized by comprising:
A pile driving frame;
The even number of drill bit parts are symmetrically arranged at the bottom of the pile driving frame, each drill bit part comprises a drill rod and a plurality of stages of stirring blade groups which are sequentially distributed along the length direction of the drill rod, each stage of stirring blade group comprises a plurality of stirring blades which are sequentially arranged along a stirring shaft, each stirring blade group comprises at least one stirring blade with drilling teeth, the stirring blades in the same stage are all arranged on the peripheral wall of the drill rod in the same posture, the planes of the stirring blades and the axis of the drill rod form an included angle which is not right angle, the stirring diameters of the stirring blades in the same stage of stirring blade groups are equal, the stirring diameters of the stirring blades in the multi-stage stirring blade groups sequentially decrease from one end close to the pile driving frame to one end far away from the pile driving frame along the length direction of the drill rod, each stage of stirring blade group comprises at least one stirring blade with drilling teeth, the drilling teeth are arranged at one end far away from the drill rod, and the tip parts of the stirring blades are inclined downwards, and the two stirring blades with the stirring teeth are symmetrically arranged relative to the rotating shaft;
the conveying part is arranged in the drill rod and comprises a conveying pipe, a first conveying channel and a second conveying channel, and is used for conveying soil restoration components; and
The injection part comprises a mounting unit and a plurality of nozzles, the mounting unit comprises a drill rod mounting hole arranged on the drill rod and a conveying pipe mounting hole arranged on the conveying pipe, the nozzles are communicated with the conveying part and are used for injecting the soil restoration component into the soil, part of the structures of the nozzles are positioned in the drill rod, the other part of the structures of the nozzles are positioned outside the drill rod,
Wherein each stage of the stirring blade group is provided with two opposite drilling rod mounting holes, the two drilling rod mounting holes are formed on an A area positioned between two adjacent stirring blades of each stage on the drilling rod, each stage of the stirring blade is formed with 4A areas on the surface of the drilling rod, only two opposite drilling rod mounting holes are formed on the A areas of 2 stages, one nozzle is positioned below the stirring blade in each stage,
The number of the nozzles corresponds to the number of the drill rod mounting holes, the nozzles are mounted through the drill rod mounting holes and the conveying pipe mounting holes,
Each of the nozzles includes:
A nozzle inner pipe, one end of which is communicated with the first conveying channel, and the other end of which extends out of the drill rod and is provided with an inner pipe outlet, wherein the diameter of the part of the nozzle inner pipe extending out of the drill rod is reduced relative to the diameter of the inner part of the drill rod;
a first injection passage formed inside the nozzle inner tube for injecting the soil restoration component delivered by the first delivery passage into the soil;
the outer nozzle pipe is sleeved outside the inner nozzle pipe, one end of the outer nozzle pipe is communicated with the second conveying channel, the other end of the outer nozzle pipe penetrates out of the surface of the drill rod to extend outwards and form an outer pipe outlet, and the diameter of the outer nozzle pipe extending out of the outer drill rod is reduced relative to the diameter of the inner part of the drill rod; and
A second injection passage formed between an outer wall of the nozzle inner tube and an inner wall of the nozzle outer tube for injecting the soil restoration component delivered by the second delivery passage into the soil,
The part of the structure of the nozzle is positioned in the drill rod, the point, farthest from the surface of the drill rod, of the structure of the nozzle positioned outside the drill rod is L point, the L point of the nozzle installed on the drill rod installation hole of the same stage is the same as the shortest distance s of the surface of the drill rod, and the shortest distance relation between the L point of each nozzle and the surface of the drill rod is as follows: the farther the nozzle is from the piling mast, the shorter the shortest distance between the L point of the nozzle and the surface of the drill rod.
2. The even-axis multistage high-pressure agitation liquid-spraying apparatus according to claim 1, wherein:
wherein each of the drill bit portions further comprises:
The drill rod is hollow, one end of the drill rod is arranged at the bottom of the pile driving frame, and the other end of the drill rod extends in a direction away from the pile driving frame; and
And the power head is arranged at one end of the drill rod, which is far away from the pile driving frame.
3. The even-axis multistage high-pressure agitation liquid-spraying apparatus as recited in claim 1 wherein,
The included angle between the plane where the stirring blade is located and the axis of the drill rod is alpha, alpha is not equal to 0 degree or 90 degrees.
4. An even-axis multistage high-pressure agitation liquid-spraying apparatus according to any one of claims 1 to 3, wherein,
Wherein, the soil remediation composition includes:
a liquid soil remediation agent; and
And the dispersing agent is used for dispersing the liquid soil restoration agent in the soil.
5. The even-axis multistage high-pressure agitation liquid-spraying apparatus as recited in claim 4 wherein,
Wherein, the conveying part further includes:
The conveying pipe is arranged in the drill rod and extends along the length direction of the drill rod, the first conveying channel is formed in the conveying pipe, and the second conveying channel is formed between the outer wall of the conveying pipe and the inner wall of the drill rod;
A high pressure pump for delivering the liquid soil remediation composition to the first delivery channel or the second delivery channel; and
An air compressor for generating and delivering high-pressure air as the diffusing agent to the first delivery passage or the second delivery passage.
6. The even-axis multistage high-pressure agitation liquid-spraying apparatus according to claim 1, wherein:
Wherein, the drill part is shown to further comprise:
and the hoop is sleeved on the drill rod and is used for guiding the drill rod.
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| CN115178580A (en) | 2022-10-14 |
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