CN2230777Y - Drill for screw extruding filling pills - Google Patents

Abstract

The utility model relates to a drill for filling pills in the field of pile foundation engineering. A drill for filling pills with screw extruding method is especially suitable for soft soil foundations. The utility model is provided with internal and external double screws; namely, a screw reamer called as internal screws is arranged in a hollow drill rod called as external screws. The double screws are connected by a clutch means and driven by a motor to work. The external screws help the drill to screw in the foundations, and the internal screws convey and extrude materials for improving the foundations or composing a pile body. The materials can be sand, broken stone, cement, building refuse, industrial waste slag, or readily mixed concrete. The drill does no environmental hazards during work, builds filling piles with positive quality and serves for modifying the existing various pile drivers.

Description

Screw extrusion castinplace pile drilling tool

The present invention relates to the castinplace pile equipment in the pile foundation engineering field.

Visit in the investigation report going abroad of Chinese scholar, once put down in writing brief first report, this report has been introduced Hungary's invention a kind of castinplace pile that is called " plug formula " basis by them, construction is with a spiral drilling machine and a concrete pump truck coordinating operation, after it is characterized in that earlier auger being screw into the projected depth of stake, again with the hollow drill of auger carrier pipe as the pumping concrete, with the pumping of concrete pump truck, the concrete that is extruded out from the bottom end opening of hollow drill is with the soil body around the very high pressure extrusion, and the jacking spiral drill rises and forms a cylindrical pile body, and then inserts reinforcing cage again.Because of resembling, whole construction course pulls the cork from a bottle, so be called " plug formula " basis by Hungary.Its advantage mainly contains three, and the one, not for pore-forming is for precession because of it adopts spiral drill, thus needn't immersed tube guard aperture or mud guard aperture, good to various ground compliance; The 2nd, because of pile body is pumped extrusion modling, so the supporting capacity of the reliable in quality of stake, folk prescription concrete is higher; The 3rd, do not produce any environmental hazards in the construction.

The a fly in the ointment one that it is considered herein that " plug formula " foundation construction technology is because need the two-shipper coordinating operation, so increased to the requirement condition of equipment and the difficulty of construction, the 2nd, the pumping concrete is applied to bored concrete pile foundation exists some actual problems, the pumping concrete belongs to extraordinary concrete technology, in works (1) [" special concrete design and construction " harmony is originally write China Construction Industry Press's front page in 1993], the pumping concrete there is detailed description, that summarizes says, the pumping concrete is tighter to material requirements, match ratio to concrete is had relatively high expectations, the requirement construction organization is tight, carry continuously guaranteeing, avoid the intermittence of long period and result in blockage, in case stop up, dredge pretty troublesome.It is suitable for the situation of a large amount of continuous conveyings, but inevitably frequent resting will appear in the construction on " plug formula " basis, at least making a call to a pile will rest once, this is because only after auger is finished the work of precession ground, could begin the cause of pumping next time, do not allow to surpass 45min general idle hours, also should be in idle hours every several minutes turn on pumps 1 time, if because of certain reason has prolonged idle hours, just must wash residual concrete in the carrier pipe with press water or other method.

For above-mentioned reasons, so the invention provides a kind of screw extrusion castinplace pile drilling tool, its objective is by screw extrusion and replace the pumping extruding, realize first replacing the two-shipper cooperation with a machine operation, second the purpose of easy construction requirement and program will enlarge the range of application of drilling tool, make it to have many kinetic energy property, not only can play the concrete stake, all right sanding stake, lime soil pile, broken stone pile, slag stake etc.

As accompanying drawing, the present invention because of one only the hypomere inner chamber that has a cylinder type hollow drilling rod of helical blade a screw reamer has been installed, so drilling tool has inside and outside cohelix, its outer heavy corkscrews equally plays the precession ground with common auger, then is used for carrying and the extruding concrete as the screw reamer of interior heavy corkscrews.This is cohelix to be linked together by an arrangement of clutch, only control their clutch by the rotating of motor (1), promptly when motor (1) when just changeing, reducer (2) also just changes, this moment cohelix for " close state, they are just changeing with constant angular velocity; drilling tool is done the precession operation, because of outer heavy corkscrews only has helical blade (12) at hypomere, so have only a small amount of native discharge during precession; During motor (1) counter-rotating, reducer (2) also reverses, this moment cohelixly be " from " state, the operation of having only the screw reamer counter-rotating to carry pressing materials, and outer heavy corkscrews can not rotate because of the frictional resistance effect that is subjected to the soil body, drilling tool is subjected to the jacking of the material that pushes out from the apex point discharging opening, can be ejected ground as pulling the cork from a bottle, available in case of necessity hoist engine service hoisting drilling tool.Arrangement of clutch is to be made of the handle (4) of dialling that two identical circular-arc ratchets (3) that curve with flat square triangle steel plate and square steel are made, a right-angle side of ratchet is welded on the end face that the bolt of arranging with hoop (5) is connected in the sliding shaft sleeve (6) on epimere hollow drill (8) inwall suitable for reading, the crown below of each ratchet has and the right angle breach of dialling handle (4) engagement, dialling handle (4) level crosses on the Hollow Cylindrical Shaft (15) of epimere spiral lamination cutter, Hollow Cylindrical Shaft (15) is connected by flange with the output shaft of reducer (2), it radially is subjected to bearing shell (14) constraint, when motor just changes, each inclined-plane along a ratchet (3), two ends of dialling handle (4) glides and embeds in the right angle breach of ratchet, make inside and outside cohelix with constant angular velocity precession ground, this moment the apex point place discharging opening by cone blocking (29) shutoff on the solid circular shaft of hypomere reamer (28); When needs conveying and pressing materials, the motor counter-rotating, dialling handle (4) will be along sliding on the inclined-plane of ratchet (3) and disengaging, and this is right, and discharging opening also is opened simultaneously.

The axle of screw reamer is divided into two sections up and down, and epimere is Hollow Cylindrical Shaft (15), and discontinuous line cutter blade (16) spacing is bigger on it; Hypomere is solid circular shaft (28), discontinuous line cutter blade (27) is arranged compact on it, the line cutter shaft of two sections adopts the form of male and female joggle, female joint is circular shaft square hole (17), male joint is circular shaft square toes (18), and the junction also has pin (19) that pin and box sub can not be thrown off when operation.

For material is born the vertical reaction force overwhelming majority of the reamer hypomere by the line cutter, thrust bearing (25) and radial bearing (26) are housed on the solid circular shaft of hypomere reamer (28), and the glade plane space between bearing holder (housing, cover) (22) and its gland (23) and mangler shaft is all used multiple-sealed circle (24) sealing.Be cast with two support arms (21) in same plane on the outer wall of bearing holder (housing, cover) (22), an arc tips wing (20) respectively is with in the end of each palm arm, the convex surface of the end wing is pasting the inwall of outer heavy corkscrews hypomere hollow drill (11), can in vertical gathering sill (13), slide up and down, each gathering sill is made of the square steel bar on two vertical parallel inwalls that are welded in hollow drill (11), and the width of rebate of gathering sill is a bit larger tham the chord length of the end wing (20).This gathering sill also plays a part to hinder material and reamer rotation synchronously, in order to extruding smoothly of material.

Because the hypomere at reamer is installed the cross-sectional area that bearing has occupied a part of material channel, so the hypomere diameter of outer heavy corkscrews hollow drill is bigger than epimere diameter, two sections junction is provided with caulking ring (9), and the bolt of arranging by hoop (10) interconnects.When pressing materials is carried in the reamer counter-rotating, the reaction force of material rises jacking line cutter, the end wing (20) slide into caulking ring (9) will be subjected to when locating hindering can not continue to go up sliding, this just makes material that the reaction force major part of the reamer hypomere by reamer is born, improved the slenderness ratio of reamer circular shaft effectively, strengthened the channel cross-section of material, thereby made drilling tool can do more longerly.

The present invention has a minor spiral apex point (30) in the below of cone blocking (29), and its effect is when drilling tool carries out the precession operation, the time, reduce the precession resistance, when drilling tool is carried pressing materials, avoid the generation of discharging opening place material clogging.

Slit between cone blocking (29) and discharging opening can be irritated some concrete sealings in case of necessity slightly, makes drilling tool in the process of precession, and underground water or soil particle are poured in the drilling tool.

Have charging aperture (7) on the epimere hollow drill (8) of outer heavy corkscrews, available common lifting hopper is its feed.Than the form of pumping concrete pile, this drilling tool in use to the requirement of material except the particle diameter to coarse aggregate limits to some extent, the match ratio of concrete is not had special requirement; After a pile was extruded pour-shaping, the concrete in the drilling tool was drained, does not have delay, the solidification problem of concrete in drilling tool, with the back sand washing, washing can; It not only can carry the extruding concrete, can also carry some building wastes of crossing as sand, rubble, dirt, metallurgical slag, fragmentation of extruding etc., when on soft foundation, using this drilling tool, before carrying the extruding concrete, can reinforce the weak soil at stake point place earlier with cheap material, lift from the end resistance of soil to stake, this is very favourable to the cost that reduces the soft foundation pile foundation.In addition, it also can be used for sanding stake, broken stone pile, lime soil pile etc., has increased many on the function.

This drilling tool can be reequiped with common spiral drilling machine, the also stake machine repacking of available other type, and because of relating generally to the drilling tool part of a machine, repacking is got up than being easier to.

Claims (4)

1, a kind of spiral drill that is used for filling pile construction, mainly by motor, reducer, helical blade on hollow drill and the outer wall thereof is formed, the invention is characterized in that drilling rod differently connects through the pipe socket and with bolt by two sections, the hypomere drilling rod has helical blade, on the tube wall of epimere drilling rod top a charging aperture is arranged, hypomere drilling rod bottom is a funnelform discharging opening, the screw reamer that a conveying and pressing materials are used is housed in the drilling rod inner chamber, the line cutter shaft stretches out the transmission output shaft connection of drilling rod top with reducer, individual arrangement of clutch contact drilling rod and the reamer that is positioned at the drilling rod top.

2, by the described spiral drill of claim 1, it is characterized in that arrangement of clutch is made of ratchet (3) and the rectangular group of handle (4) that two horizontal projections are semi-annular shape, the end face of ratchet (3) is a screw inclined plane, the tooth root place of its crown below have one can with the right angle breach of dialling handle (4) engagement, ratchet is welded in the end face of the sliding shaft sleeve (6) of mangler shaft, axle sleeve (6) on drilling rod inwall suitable for reading, is dialled handle (4) by in the square hole of pin on mangler shaft by bolton.

3, by the described spiral drill of claim 1, the blade precession direction that it is characterized in that screw reamer is consistent with the helical blade on the hollow drill outer wall, the line cutter is divided into two sections up and down, the mangler shaft connected mode of epimere and hypomere is joggle and wears pin, thrust bearing (25) and radial bearing (26) are housed on the hypomere mangler shaft, block cast has two support arms (21) on bearing holder (housing, cover) (22) outer wall, the support arm band edge wing, and the end wing slides in two relative gathering sills on hypomere hollow drill inwall only.

4, by the described spiral drill of claim 1, the bottom that it is characterized in that the hypomere mangler shaft is a cone shape cone blocking (29), and a minor spiral apex point (30) is with in the cone blocking bottom.