CN203308379U - Drilling machine for pile work - Google Patents
Drilling machine for pile work Download PDFInfo
- Publication number
- CN203308379U CN203308379U CN2013203453930U CN201320345393U CN203308379U CN 203308379 U CN203308379 U CN 203308379U CN 2013203453930 U CN2013203453930 U CN 2013203453930U CN 201320345393 U CN201320345393 U CN 201320345393U CN 203308379 U CN203308379 U CN 203308379U
- Authority
- CN
- China
- Prior art keywords
- drilling rod
- unit head
- drilling
- drilling machine
- work
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to a drilling machine for pile work. The drilling machine for pile work comprises a rack, wherein the rack is equipped with a power head in a guide moving manner along the up and down direction; a work drilling rod is in transmission connection with the power head; a bit used for bearing the vibration impact force of a corresponding impactor so as to impact drilling is installed at the lower end of the work drilling rod. The drilling machine for pile work also comprises a flexible transmission component of which the axis extends along the up and down direction and a transmission component driving device used for driving the flexible transmission component for the up and down reciprocating movement; the transmission component driving device is arranged on the rack; the flexible transmission component is provided with a force transmitting device which is used for applying a downward elastic acting force to the power head when the flexible transmission component downwardly moves. The utility model provides a drilling machine for pile work, which can increase the drilling force of the drilling head in a punching and drilling process at any moment.
Description
Technical field
The utility model relates to a work driving field, relates in particular to a kind of pile work drilling machine.
Background technology
In pile foundation industry, the mode of machinery driving drilling construction mainly contains two kinds, and the first is that rotary cutting creeps into, such as revolve dig into, direct circulation creep into, reverse circulation drilling, spiral are crept into, reaming is crept into etc. all belongs to rotary-cut and creep into; The second is die-cut creeping into, and immersed tube creeps into, post hammer die-cutly creeps into, Wu Kazi percussion drilling, aeratic hidden hole creep into etc. all belongs to die-cut creeping into.Wherein die-cut creeping into can be impacted corresponding stratum on one side because of its drill bit, precession on one side, drilling efficiency high and the application comparatively extensive, existing die-cut rig as disclosed as Chinese patent literature CN202926204U " a kind of rock entering drilling machine and rotary-cut percussion drilling system thereof ", this rock entering drilling machine comprises the base that is provided with vertical stand, in vertical stand along the vertical direction guiding movement be equipped with unit head, the clutch end upper driving of unit head is connected with the work drilling rod, the lower end of work drilling rod is equipped with drill bit, on rock entering drilling machine, also be provided with for the impactor to drill bit output vibratory impulse power.When pile hole construction, on one side drill bit is crept into by the driving effect rotary-cut of unit head, Yi Bian the percussion of impactee is impacted corresponding stratum.The problem that existing this rock entering drilling machine exists is: the power of creeping into that drill bit is downward is provided by the deadweight of unit head, work drilling rod and drill bit, it is limited that the maximum of drill bit is crept into power, when running into bad ground, because the power of creeping into is not enough to overcome resistance, will cause drill free and not continue to creep into downwards, affecting operating efficiency.
The utility model content
The utility model is to provide a kind of pile work drilling machine that can increase at any time the creep into power of drill bit in die-cut drilling process.
In order to address the above problem, in the utility model, the technical scheme of pile work drilling machine is:
Pile work drilling machine, comprise frame, on frame along the vertical direction guiding movement be equipped with unit head, the unit head upper driving is connected with the work drilling rod, the lower end of work drilling rod is equipped with the drill bit that impacts rotary drilling be used to the vibratory impulse power of bearing the respective impact device, described pile work drilling machine also comprises the flexible drive parts that axis extends along the vertical direction and drives the driving member drive unit that described flexible drive parts pumps, described driving member drive unit is arranged on described frame, on described flexible drive parts, be provided with for unit head being applied the load transfer device of downward elastic acting force when described flexible drive parts moves downward.
Described flexible drive parts diametrically with described unit head matched in clearance, described load transfer device comprise along vertical spaced, for the elasticity force transmission element that unit head applied to downward elastic acting force with for unit head being applied to the upwards lifting force transmission element of active force, described unit head is arranged between described elasticity force transmission element and lifting force transmission element.
Described elasticity force transmission element is the upper buffering that the is arranged at described unit head top spring of exerting pressure, and described lifting force transmission element is the lower buffering that the is arranged at described unit head below spring of exerting pressure.
On described unit head, be provided with the vertical hole or the vertical slot that for described flexible drive parts, run through along the vertical direction, between the outer peripheral face of the hole wall in vertical hole or the cell wall of vertical slot and flexible drive parts, be provided with the radial clearance that realizes flexible drive parts and unit head matched in clearance, the described upper and lower buffering spring of exerting pressure all is set in described flexible drive parts periphery.
Described flexible drive parts is chain, described driving member drive unit comprise be arranged at described frame upper end, with the driven sprocket of described chain upper end interlock transmission and be arranged at described frame lower end, with the drive sprocket of described chain lower end interlock transmission.
Described frame comprises base and is arranged at the support body on base, described support body is gantry frame or well shape frame, described gantry frame or well shape frame comprise column and are arranged at the crossbeam of column upper end, described unit head guiding movement is assemblied on described column, and described flexible drive parts is arranged on described crossbeam.
Described work drilling rod comprises the main drilling rod that is assemblied on unit head and by the creep into drilling rod of releasable connection Standard in main drilling rod lower end, on described base, be provided with the drilling rod apparatus for placing, on the drilling rod apparatus for placing, vertically be placed with and with described main drilling rod, be set up in parallel and the drilling rod to be replaced for docking with main drilling rod, described pile work drilling machine also comprises and drives drilling rod apparatus for placing and/or support body and make drilling rod apparatus for placing relative orientation and away from the straight line driving mechanism of support body direction motion.
On described base, be provided with the cross slide way that two guide direction are radially extended along the work drilling rod, described gantry frame or well shape frame guiding movement are assemblied on described cross slide way, described straight line driving mechanism is arranged between support body and base, described drilling rod apparatus for placing is arranged between described two cross slide waies, described drilling rod apparatus for placing comprises the housing sleeve that is set in drilling rod to be replaced periphery or is plugged in the placement post in the endoporus of drilling rod to be replaced, the distance of described two cross slide waies of the axial line distance of described drilling rod apparatus for placing is identical with the distance of described two cross slide waies of axial line distance of work drilling rod.
Described base is provided with for the walking mechanism syndeton be fixedly connected with corresponding walking mechanism and/or the ground fixed structure for being fixedly connected with corresponding ground.
The beneficial effects of the utility model are: while creeping into, drill bit is subjected to the driving effect rotary drilling of unit head on one side, the percussion percussion drilling of one side impactee, the downward elastic acting force applied by load transfer device when the flexible drive parts that extended along the vertical direction by axis simultaneously moves downward pressurizes and creeps into, realized that rotary-cut, impact and the pressurization of drill bit creep into simultaneously, improved the creep into power of drill bit in die-cut drilling process.Flexible drive parts to the elasticity on the unit head downward direction exert pressure both can guarantee to drill bit continue uninterruptedly exert pressure, the vibration that can guarantee again unit head is cushioned by load transfer device and is not passed to the driving member drive unit, guaranteed that effectively the driving member drive unit is not affected by vibration, increased the application life of driving member drive unit.
The accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment 1 of pile work drilling machine in the utility model;
Fig. 2 is the use state diagram of Fig. 1 while changing drilling rod;
Fig. 3 is the structural representation of the embodiment 2 of pile work drilling machine in the utility model.
The specific embodiment
The embodiment 1 of pile work drilling machine is as shown in Figure 1 and 2: comprise frame, frame comprises base 14 and is arranged at the gantry frame on base, base is provided with for the walking mechanism syndeton be fixedly connected with corresponding walking mechanism, and base is assemblied on the walking mechanism with reversing chassis by the walking mechanism syndeton.Gantry frame comprises two columns 4 and is arranged at the crossbeam 24 on two column tops, on two columns 4 of gantry frame along the vertical direction guiding movement be equipped with unit head 5, the unit head upper driving is connected with on outer peripheral face the work drilling rod that is provided with helical blade 8, the lower end of work drilling rod is equipped with drill bit, on drill bit, be provided with and bore tooth 16, conveying pipeline 10 has been coaxially set in the work drilling rod, between conveying pipeline and work drilling rod, be provided with for to drill bit, applying the mechanical type impactor of vibratory impulse power, the mechanical type impactor comprises jump bit cover 11 and the stay cord 9 overlapped be used to promoting jump bit, the upper end of stay cord is connected on jump bit lifting appliance 1.On each column of gantry frame, be provided with the driving member drive unit, the driving member drive unit comprises the drive sprocket 12 that is arranged at corresponding column lower end and the driven sprocket 2 that is arranged at corresponding column upper end, main, driven sprocket is in transmission connection by the ring chain 3 of sealing, wherein ring chain is the work chain 18 that axis extends along the vertical direction near one section chain of the first side of power, on unit head, be provided with the vertical hole 21 of running through along the vertical direction for corresponding work chain respectively, between the hole wall in work chain and vertical hole, be provided with the radial clearance that realizes work chain and unit head matched in clearance, on the work chain, be provided with load transfer device, load transfer device comprises and laying respectively on unit head, the upper buffering of below spring 19 and the lower buffering spring 23 of exerting pressure of exerting pressure, upper buffering exert pressure spring upper end with work chain be fixedly connected with, the exert pressure lower end guiding of spring of upper buffering is assemblied in the upper pilot hole 20 that is arranged at upper end, vertical hole, at the bottom of the hole of upper pilot hole with the spring top interference fit of exerting pressure of upper buffering, the exert pressure lower end of spring of lower buffering is fixedly connected with the work chain, and the exert pressure upper end guiding of spring of lower buffering is assemblied in the lower pilot hole 22 that is arranged at lower end, vertical hole, at the bottom of the hole of lower pilot hole with the spring top interference fit of exerting pressure of lower buffering.On base, be provided with the cross slide way 13 that two guide direction are radially extended along the work drilling rod, two columns of gantry frame are being assemblied on corresponding cross slide way of guiding movement respectively, between cross slide way and gantry frame, be provided with and drive gantry frame along the reciprocating straight line driving mechanism of cross slide way, between two cross slide waies, be provided with for vertically placing the drilling rod placing tube 27 of corresponding drilling rod 28 to be replaced, the drilling rod placing tube has a plurality of, the distance of two cross slide waies of axial line distance of drilling rod placing tube is identical with the distance of two cross slide waies of axial line distance of work drilling rod, on unit head, be provided with clamper 6, on base, also be provided with casing formula hydraulic gripper 15.In figure, part 17 means to open the door at the bottom of drill bit.The work chain can be realized unit head is exerted pressure, and can realize promoting again unit head, has greatly simplified the structure of rig, has reduced the cost of manufacture of rig.
When normally creeping into, creep into by unit head effect rotary-cut while being subjected to for drill bit, impactee effect percussion drilling, crept into by the effect pressurization of exerting pressure of work chain downwards simultaneously, rotary-cut, impact and the pressurization while drilling construction of drill bit have been realized, go for the tunneling construction of the various bad grounds such as soft soil layer, bad ground, ground consisting of hard rock, wherein lower work drill pipe clamp can play the drilling rod casing effect when rod boring, the work drilling rod comprises the main drilling rod that often is loaded on unit head and in main drilling rod lower end, creeps into drilling rod 25 by the releasable connection Standard, the releasable connection structure comprises along the vertical direction across main drilling rod and the keyway that creeps into drilling rod and coordinate interface, the intermediate channel footpath of keyway is little, upper and lower two end slot footpaths are large, radially spiral-lock has the key-separation piece with the keyway shape adaptation in keyway, the outside of key-separation piece does not protrude from the outer peripheral face of corresponding drilling rod, the key-separation piece is fixed on corresponding drilling rod by screw, the key-separation piece can play the axial anticreep effect of main drilling rod and work drilling rod like this, simultaneously, the releasable connection structure can disconnect fast, can guarantee again corresponding deslagging smoothly, when needs are changed drilling rod, make main drilling rod and creep into drilling rod and separate, then by work chain lifting unit head, unit head drives on main drilling rod and moves on to precalculated position, straight line driving mechanism drives gantry frame and moves along cross slide way, until the dead in line of drilling rod to be replaced in the axis of main drilling rod and drilling rod placing tube, then the chain of working is transferred unit head, main drilling rod is docked by the structure that removably connects with drilling rod to be replaced, after having docked, again promote unit head, the mobile gantry frame is to creeping into the drilling rod position, carry out the drilling construction of next joint drilling rod, use by gantry frame, not only make the setting of driving member drive unit and work chain more easily simple, also facilitated simultaneously the Renewal process of drilling rod, gantry frame is steadily mobile on cross slide way, drilling rod Renewal process safety, fast, upper and lower buffering being used in conjunction with of spring of exerting pressure, the work chain of making can not be subjected to the impact of unit head vibration substantially.
In other embodiment of the present embodiment 1: ring chain also can be replaced by other flexible drive parts such as wire rope, when by wire rope, coordinating with unit head, wire rope can not be a closed ring structure, now the driving member drive unit can be the lower elevator that is arranged at the upper elevator of frame upper end and is arranged at the frame lower end, the upper end of wire rope is wrapped on the reel of elevator, and the lower end of wire rope is wrapped on the reel of lower elevator, certainly the work chain also can can't help to pass in unit head, but be arranged in the periphery of unit head, now can on the work chain, the upper and lower cantilever construction of extending towards the unit head direction be set, the upper buffering spring of exerting pressure is arranged between upper cantilever structure and unit head, and the lower buffering spring of exerting pressure is arranged between lower cantalever structure and power, certainly the lower spring of exerting pressure that cushions can also be replaced by the lifting force transmission element of a rigidity force transferring structure, such as be riser, lift block, between this lifting force transmission element and unit head, be provided with corresponding end play, this end play can guarantee that unit head does not contact with this lifting force transmission element when drilling construction, when promoting unit head, because unit head is not being worked, so can directly by promoting force transmission element, coordinate with the unit head power transmission, now the rigidity force transferring structure also can be arranged at the top of unit head, corresponding elasticity force transmission element can be the extension spring be arranged between unit head lower end and work chain, gantry frame also can be replaced by a column, the mechanical type impactor also can be replaced by hydraulic impactor, and impactor can also not established the part of this pile work drilling machine certainly, such as is an outsourcing piece in use, when the needs drilling construction, just impactor need to be assemblied on pile work drilling machine, the structure that removably connects that main drilling rod is connected with other drilling rod can be also flange or axial splines syndeton, upper elastic buffer spring also can be replaced by other elasticity force transmission elements with axial elasticity elastic deformation amount such as rubber, vertical hole can also be replaced with the vertical slot that the unit head outer peripheral face communicates by vallecular cavity, gantry frame also can be replaced by the support body of other structure such as well shape frame, and well shape frame comprises four columns, and adjacent two columns connect by crossbeam, and each column and crossbeam form well shape structure together, the drilling rod placing tube can also be placed other drilling rod apparatus for placing replacements such as post, during use, drilling rod to be replaced can be set in to the periphery of placing post, certainly straight line driving mechanism can also be arranged between drilling rod placing tube and base, now can straight line driving mechanism by driving the drilling rod placing tube towards relative motion and opposing motion with away from gantry frame, moving to realize gantry frame and drilling rod placing tube, wherein straight line driving mechanism can be driving cylinder, pinion and rack or electric pushrod mechanism.
The embodiment 2 of pile work drilling machine is as shown in Figure 3: embodiment 2 as different from Example 1, on base, be provided with the ground fixed structure for being fixedly connected with corresponding ground, the ground fixed structure is a plurality of installing holes, when running into the complex work environment, can with 30 installing holes, coordinate gantry frame is fixed on ground by earth anchor, realize without the pile frame drilling construction.
Claims (9)
1. pile work drilling machine, comprise frame, on frame along the vertical direction guiding movement be equipped with unit head, the unit head upper driving is connected with the work drilling rod, the lower end of work drilling rod is equipped with the drill bit that impacts rotary drilling be used to the vibratory impulse power of bearing the respective impact device, it is characterized in that: described pile work drilling machine also comprises the flexible drive parts that axis extends along the vertical direction and drives the driving member drive unit that described flexible drive parts pumps, described driving member drive unit is arranged on described frame, on described flexible drive parts, be provided with for unit head being applied the load transfer device of downward elastic acting force when described flexible drive parts moves downward.
2. pile work drilling machine according to claim 1, it is characterized in that: described flexible drive parts diametrically with described unit head matched in clearance, described load transfer device comprise along vertical spaced, for the elasticity force transmission element that unit head applied to downward elastic acting force with for unit head being applied to the upwards lifting force transmission element of active force, described unit head is arranged between described elasticity force transmission element and lifting force transmission element.
3. pile work drilling machine according to claim 2 is characterized in that: described elasticity force transmission element is the upper buffering that the is arranged at described unit head top spring of exerting pressure, and described lifting force transmission element is the lower buffering that the is arranged at described unit head below spring of exerting pressure.
4. pile work drilling machine according to claim 3, it is characterized in that: on described unit head, be provided with the vertical hole or the vertical slot that for described flexible drive parts, run through along the vertical direction, between the outer peripheral face of the hole wall in vertical hole or the cell wall of vertical slot and flexible drive parts, be provided with the radial clearance that realizes flexible drive parts and unit head matched in clearance, the described upper and lower buffering spring of exerting pressure all is set in described flexible drive parts periphery.
5. pile work drilling machine according to claim 1, it is characterized in that: described flexible drive parts is chain, described driving member drive unit comprise be arranged at described frame upper end, with the driven sprocket of described chain upper end interlock transmission and be arranged at described frame lower end, with the drive sprocket of described chain lower end interlock transmission.
6. according to the described pile work drilling machine of claim 1 ~ 5 any one, it is characterized in that: described frame comprises base and is arranged at the support body on base, described support body is gantry frame or well shape frame, described gantry frame or well shape frame comprise column and are arranged at the crossbeam of column upper end, described unit head guiding movement is assemblied on described column, and described flexible drive parts is arranged on described crossbeam.
7. pile work drilling machine according to claim 6, it is characterized in that: described work drilling rod comprises the main drilling rod that is assemblied on unit head and by the creep into drilling rod of releasable connection Standard in main drilling rod lower end, on described base, be provided with the drilling rod apparatus for placing, on the drilling rod apparatus for placing, vertically be placed with and with described main drilling rod, be set up in parallel and the drilling rod to be replaced for docking with main drilling rod, described pile work drilling machine also comprises and drives drilling rod apparatus for placing and/or support body and make drilling rod apparatus for placing relative orientation and away from the straight line driving mechanism of support body direction motion.
8. pile work drilling machine according to claim 7, it is characterized in that: on described base, be provided with the cross slide way that two guide direction are radially extended along the work drilling rod, described gantry frame or well shape frame guiding movement are assemblied on described cross slide way, described straight line driving mechanism is arranged between support body and base, described drilling rod apparatus for placing is arranged between described two cross slide waies, described drilling rod apparatus for placing comprises the housing sleeve that is set in drilling rod to be replaced periphery or is plugged in the placement post in the endoporus of drilling rod to be replaced, the distance of described two cross slide waies of the axial line distance of described drilling rod apparatus for placing is identical with the distance of described two cross slide waies of axial line distance of work drilling rod.
9. pile work drilling machine according to claim 6, it is characterized in that: described base is provided with for the walking mechanism syndeton be fixedly connected with corresponding walking mechanism and/or the ground fixed structure for being fixedly connected with corresponding ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203453930U CN203308379U (en) | 2013-06-17 | 2013-06-17 | Drilling machine for pile work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203453930U CN203308379U (en) | 2013-06-17 | 2013-06-17 | Drilling machine for pile work |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203308379U true CN203308379U (en) | 2013-11-27 |
Family
ID=49614595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203453930U Expired - Lifetime CN203308379U (en) | 2013-06-17 | 2013-06-17 | Drilling machine for pile work |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203308379U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277044A (en) * | 2013-06-17 | 2013-09-04 | 邵金安 | SDL pile work drilling method and pile work drilling machine specially used for implementing same |
| CN104329021A (en) * | 2014-11-05 | 2015-02-04 | 余长青 | Rotary disc drilling machine with guide function |
| CN105545226A (en) * | 2016-01-30 | 2016-05-04 | 周兆弟 | Lifting device for drill rods of piling machine |
| CN105862729A (en) * | 2016-01-30 | 2016-08-17 | 周兆弟 | Pile driver |
| CN111287649A (en) * | 2020-02-11 | 2020-06-16 | 秦亚州 | Shock-proof type oil drilling and production machinery |
| CN111911073A (en) * | 2020-07-30 | 2020-11-10 | 王亚军 | Over-and-under type drilling system |
| CN115199208A (en) * | 2022-09-13 | 2022-10-18 | 陕西清腾畅建筑工程有限公司 | Road side slope drilling equipment |
-
2013
- 2013-06-17 CN CN2013203453930U patent/CN203308379U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277044A (en) * | 2013-06-17 | 2013-09-04 | 邵金安 | SDL pile work drilling method and pile work drilling machine specially used for implementing same |
| CN103277044B (en) * | 2013-06-17 | 2015-08-05 | 邵金安 | SDL stake work driving method and be exclusively used in and implement the pile work drilling machine of the method |
| CN104329021A (en) * | 2014-11-05 | 2015-02-04 | 余长青 | Rotary disc drilling machine with guide function |
| CN105545226A (en) * | 2016-01-30 | 2016-05-04 | 周兆弟 | Lifting device for drill rods of piling machine |
| CN105862729A (en) * | 2016-01-30 | 2016-08-17 | 周兆弟 | Pile driver |
| CN105862729B (en) * | 2016-01-30 | 2017-12-29 | 周兆弟 | Piling machine |
| CN111287649A (en) * | 2020-02-11 | 2020-06-16 | 秦亚州 | Shock-proof type oil drilling and production machinery |
| CN111911073A (en) * | 2020-07-30 | 2020-11-10 | 王亚军 | Over-and-under type drilling system |
| CN115199208A (en) * | 2022-09-13 | 2022-10-18 | 陕西清腾畅建筑工程有限公司 | Road side slope drilling equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203308379U (en) | Drilling machine for pile work | |
| CN103277044B (en) | SDL stake work driving method and be exclusively used in and implement the pile work drilling machine of the method | |
| CN102304922B (en) | Full-pile casing construction device | |
| CN200975217Y (en) | Canula drilling machine | |
| CN103089145A (en) | Down-hole hammer power head of rotary drilling rig and rotary drilling rig | |
| CN103114806A (en) | Rotary drilling rig | |
| CN205349223U (en) | Drilling equipment for building | |
| CN102409974B (en) | Vibration and extrusion type drilling machine | |
| CN104594802A (en) | Hydraulic combined impact hammer drilling machine | |
| CN204371098U (en) | A kind of Combined hydraulic jump bit rig | |
| CN104141455B (en) | Drilling equipment and rig drilling method | |
| CN101343979A (en) | Integrated arm type in-hole perforator | |
| CN104912476A (en) | Rotary excavating pile driving mechanism of hydraulic pile driving equipment | |
| CN201794514U (en) | Portable rotary drilling rig | |
| CN202926204U (en) | Rock cracking drilling machine and rotary cutting impact drilling system thereof | |
| CN204851053U (en) | Double dynamical first all -hydraulic core -drill(ing) machine of top formula of driving | |
| CN104863497A (en) | Drilling bit spiral impact device | |
| CN102392598B (en) | Hydraulic vibration impactor and pile driving power head comprising same | |
| CN201908565U (en) | Base plate anchor rope drilling machine for coal mine tunnel | |
| CN201915831U (en) | Impact hydraulic rock drill | |
| CN201306118Y (en) | Hydraulic shaft-well drill | |
| CN103291212A (en) | Long spiral power head buffer device and multifunctional power head buffer device of rotary drilling rig | |
| CN216866558U (en) | Power device of drill rod | |
| CN202673136U (en) | Vibration impact device and piling worker drilling unit head device comprising same | |
| CN202023504U (en) | Rotary eccentric casing drilling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131127 |
|
| CX01 | Expiry of patent term |