A kind of low gravity center three-axle spiral drilling machine
The utility model relates to a kind of spiral drilling machine, relates in particular to a kind of low gravity center three-axle spiral drilling machine.
At present, commonly used in the boring to a kind of SMW worker's method, this worker's method also is the colonnade formula soil water mud wall worker method, promptly utilize the multiaxial type full screw earth auger in soil, to hole, inject the cement paste of suitable different engineering diaphragm walls in the time of boring from the drill bit end, after reaching desired depth, counter-rotating promotes and cement grout is carried in continuation, abundant and native soil stirs, build up one section cement soil continuous wall in situ, and then carry out second section wall construction, and make adjacent soil water mud wall that superposition section be arranged each other, construction can be made diaphragm wall continuously.Insert H shaped steel according to different needs simultaneously, make the usefulness of maintenance of deep excavation basis or sealing.
The characteristics of this worker's method are: good waterproof performance, and construction depth is big, and retaining soil nature can be good, and operating expenses is low, belongs to leading domestic technology.Can be widely used in the underground fortification excavation and make the waterproof retaining wall, the revetment of going bail for during buried pipeline, the waterproof of rivers dam, the engineerings such as reinforcing of impervious wall and other subgrades.
The typical rig of SMW worker's method mostly is the auger agitation driller, and based on three types, its matching used pile frame used the more rig that is generally 3 long saddles of pile driver formula in the past.Though this machine rig degree of depth dark (reaching 26m) must be used up to the 33m saddle.In addition because the structure of this machine is the top that 3 bigger reductor equal power devices of loading is arranged on saddle, so the center of gravity of complete machine higher (reaching 9.1m).When there is the gradient that should decide in the job site or carries out when mobile, because inertia force, there is the possibility of toppling in rig.Typhoon and earthquake all can make this machine topple in addition.
This shows that the center of gravity of existing spiral drilling machine is higher, have the danger (stability is not high) of toppling over, these have all constituted certain threat for resident, unit, the pedestrian that passes by on one's way of job site periphery.Although this machine has been taked certain measure, also bring many troubles to construction.
In addition, some top, place, job site exists high voltage supply facility or elevated road, these ambient conditionss all to require the height of rig low.
For fear of above-mentioned disadvantage, satisfy the ambient conditions requirement, improve safety of construction, improve operating environment, exploitation saddle height low gravity center three-axle spiral drilling machine low, that have same efficiency of construction and big degree of depth construction ability simultaneously again just seems particularly necessary.
Summary of the invention
The purpose of this utility model is to provide a kind of low gravity center three-axle spiral drilling machine, and it solves the high problem of rig center of gravity under the situation that does not reduce drilling depth, overcomes the too high problem of spiral drilling machine center of gravity in the prior art.
For achieving the above object, the utility model discloses a kind of low gravity center three-axle spiral drilling machine, it comprises body, rubber tube, rubber tube directive wheel, rubber tube up-coiler, unit head, drilling rod, swivel joint and augers; It is characterized in that: drilling rod is telescopic telescopic drilling rod, and this telescopic drilling rod upper end connects creeps into unit head, and the lower end connects augers; One end of rubber tube is connected in the augers by swivel joint, and the other end is wound on this rubber tube up-coiler.
Wherein, telescopic drilling rod comprises first segment telescopic drill rod, the second joint telescopic drill rod and the 3rd joint spiral telescopic drill rod.
Wherein, fix by double pointed nail between each telescopic drill rod.
Wherein, this telescopic drilling rod has three, and three rubber tubes feed respectively in three telescopic drilling rods.
Wherein, the both sides rubber tube is a Grouting Pipe, and a middle rubber tube is an air injection pipe.
By said structure, the major advantage and the good effect of low gravity center three-axle spiral drilling machine of the present utility model are as follows:
Optimized the performance of inner each parts of three reductors (unit head) on the one hand, guaranteed under exporting, to reduce each part dimension as much as possible, from reaching the overall weight that alleviates three reductors with the constant power prerequisite; On the other hand under lower pile frame, Telescopic by the telescopic sleeve pipe type sucking drilling rod, to realize that low pile driving frame configuring condition strengthens the purpose of construction depth down, when it can be implemented in saddle 15m and 17m, corresponding drilling depth is 25m and 27m, effectively reduced the whole height of construction equipment, had simultaneously and 3 original efficiencies of construction that spiral drilling machine is almost equal.
Detailed content of the present utility model can obtain by explanation described later and institute's accompanying drawing.
Description of drawings
Fig. 1 is the schematic diagram of low gravity center three-axle spiral drilling machine of the present utility model.
Fig. 2 is unit head of the present utility model and drilling rod front view (under the whole indentation states of drilling rod).
The specific embodiment
Referring to Fig. 1 and Fig. 2, low gravity center three-axle spiral drilling machine of the present utility model comprises body (not shown), rubber tube winding stand 1, rubber tube 2, rubber tube directive wheel 3, creep into unit head 4, the 3rd joint telescopic drill rod 5, the second joint telescopic drill rod 6, first segment spiral telescopic drill rod 7, swivel joint 8, augers 9 constitute, and rubber tube winding stand 1, rubber tube directive wheel 3, creeps into unit head 4 and is installed on the body; The telescopic sectional rod that the 3rd joint telescopic drill rod 5, the second joint telescopic drill rod 6, first segment spiral telescopic drill rod 7 common compositions can stretch, wherein, this telescopic sectional rod also can be different combinations such as two joints or four joints, be preferably three joints among this embodiment, between telescopic drill rod by fixing in conjunction with pin, when stretching out and withdraw, all position by double pointed nail, when withdrawal, in the 3rd joint telescopic drill rod 5 withdrawals second joint telescopic drill rod 6, in the second joint telescopic drill rod, the 6 withdrawal first segment telescopic drill rods.This telescopic sectional rod upper end connects creeps into unit head, and the lower end connects augers.
Rubber tube 2 is a hollow tube, elongation and withdrawal by rubber tube winding stand 1 control rubber tube 2, this winding stand 1 can be installed as required from rubber tube directive wheel 3, the trend of control rubber tube 2, the end of rubber tube 2 is connected to drill bit by screwed union 8, can carry slurry or gas as required, the other end is wound on this rubber tube up-coiler.
Referring to Fig. 2, shown unit head and drilling rod front view under the whole indentation states of drilling rod, in this embodiment, have three telescopic drilling rods, three rubber tubes 11,12 stretch into respectively in the corresponding drilling rod, and wherein, two rubber tubes 11 are Grouting Pipe; Middle rubber tube 12 be an air injection pipe, and the drilling rod upper end has upper support frame 13, guarantees relative position between drilling rod, and the lower end connects augers 9, guarantees relative position between drilling rods by lower support frame 14, the double simultaneously analog bracket when making drilling rod and stretching.
Creep into unit head 4 for rig provides power, it comprises dynamical system and transmission system, and this dynamical system and transmission system all adopt the most frequently used as equipment commonly used such as motor, reducer, here just describe in detail no longer one by one.
When holing, at length step is as follows:
(1) boring is prepared: augers is adjusted to the below of center rest, closes the lower central carriage;
(2) adopt first segment to hole when telescopic drill bit all shrinks, boring is opened the lower central carriage after finishing, and drilling rod is preset on the carriage, extracts double pointed nail;
(3) after the boring of first segment drilling rod finishes drilling rod is preset on the carriage, pulls out the second joint drilling rod, insert double pointed nail, adopt the second joint drilling rod to hole;
(4) second joint drilling rod borings finish the back drilling rod are preset on the carriage, extract double pointed nail; Stretch out the 3rd joint drilling rod, drilling rod is preset on the carriage, pull out the 3rd joint drilling rod, insert double pointed nail, adopt the 3rd joint drilling rod to hole;
(5) arrive desired depth after boring finish, change direction of rotation, on carry drilling rod, i.e. a secondary boring finishes.
Boring finishes after arriving desired depth, changes direction of rotation (repeatedly at the bottom of the poke hole), carries drilling rod on the return preface by drilling program, i.e. a secondary boring finishes.
The utility model has adopted telescopic drilling rod, adopted three joints to stretch, so the swivel joint of cement paste supply pipe and air supply pipe also moved on to first segment drilling rod inside by originally being installed on the top unit head, swivel joint bottom hard tube is followed drilling rod and is rotated together, and the top flexible pipe does not change, and, follow flexible the volume repeatedly automatically of drilling rod to put by the flexible pipe coil winder of installation with the main frame rear portion.The jet exit of each pipeline on spiral head constitutes a closed fully loop, both can prevent to leak, and can guarantee the continuity of constructing again, thereby improve efficiency of construction.The telescopic sleeve pipe type sucking drilling rod is engaged with swivel joint, make that cement paste and compressed-air actuated conveying are not subjected to the flexible influence of drilling rod in the boring procedure, and effectively save drilling rod and renew the time, construction period shortens.