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CN102691483A - Rotary drilling rig and pulley yoke thereof - Google Patents

Rotary drilling rig and pulley yoke thereof Download PDF

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Publication number
CN102691483A
CN102691483A CN201210170414XA CN201210170414A CN102691483A CN 102691483 A CN102691483 A CN 102691483A CN 201210170414X A CN201210170414X A CN 201210170414XA CN 201210170414 A CN201210170414 A CN 201210170414A CN 102691483 A CN102691483 A CN 102691483A
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CN
China
Prior art keywords
pulley
postbrachium
forearm
rotary drilling
drilling rig
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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.)
Pending
Application number
CN201210170414XA
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Chinese (zh)
Inventor
肖冰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Sany Heavy Machinery Co Ltd
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Beijing Sany Heavy Machinery Co Ltd
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Filing date
Publication date
Application filed by Beijing Sany Heavy Machinery Co Ltd filed Critical Beijing Sany Heavy Machinery Co Ltd
Priority to CN201210170414XA priority Critical patent/CN102691483A/en
Publication of CN102691483A publication Critical patent/CN102691483A/en
Pending legal-status Critical Current

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Abstract

The invention provides a rotary drilling rig and a pulley yoke thereof. The pulley yoke is mounted on at least one pulley assembly on the top of a mast of the rotary drilling rig. The pulley assembly is matched with a winding wire rope of the rotary drilling rig. The pulley assembly comprises a front arm disposed on the top of the mast, a rear arm, a transverse arm and pulleys disposed on the front arm and the rear arm respectively. Two ends of the transverse arm are connected with the front arm and the rear arm respectively. At least one of the front arm, the rear arm and the transverse arm is telescopic so as to adjust distance between the pulley on the front arm and the pulley on the rear arm. By the pulley yoke, work range of a main pulley is increased, work range of the rotary drilling rig is increased, multi-functionality of the rotary drilling rig is achieved, auxiliary hoisting range is expanded, and intervention of hosting objects with the mast is avoided.

Description

A kind of rotary drilling rig and pulley yoke thereof
Technical field
The present invention relates to engineering machinery field, specifically, relate to a kind of rotary drilling rig and pulley yoke thereof.
Background technology
Along with Chinese economic development, rotary drilling rig in pile hole construction more and more widely.The more and more refinement of construction on modern stake worker basis, kind is more and more various, but requires to get more and more to revolving the boundary of works area that digs brill.A kind of can fast adaptation different job practicess, different aperture, multifunctional rotary excavating driller demand rapidly and efficiently constantly increases.
A kind of typical rotary drilling rig comprises walking mechanism; The mast of rotary drilling rig, various control device etc. all are fixed on the chassis of walking mechanism; Drilling rod is installed in the mast end through winding plant, and the folding and unfolding through elevator realizes the motion of drilling rod, at the end of drilling rod unit head and drill bit is installed; Unit head and drill bit are the main workpiece of rotary drilling rig, and both move up and down under the drive of drilling rod and creep into realization; On the mast of rotary drilling rig, be fixed with pulley yoke (catead); The pulley of the major and minor elevator in the winding plant all is fixedly installed on the pulley yoke (catead); Be used for changing the direction of motion of winding plant wire rope, when the lifting of drilling rod, decline and lifting, play a supporting role; Because pulley yoke (catead) at the top of rotary drilling rig, has very big influence to the effect of lifting by crane.Therefore, want to promote compliance, the multifunctionality of rig, just must change the activity space of pulley yoke, increase the radius of clean-up of lifting, can join the different working drilling tools of worker's method simultaneously.
A kind of typical pulley yoke (catead) includes pulley yoke, truckle assembly, large pulley assembly, large pulley anticreep rope bar and the truckle anticreep rope bar of gripper shoe; Pulley yoke (catead) is fixed on the mast through the pulley support body; Two groups of large pulley assemblies and two groups of truckle assemblies are fixed on the pulley support body, and wire rope is realized the support function of guiding through two large pulleys or two truckle places; Each large pulley assembly place is equipped with anticreep rope bar, prevents that wire rope from taking off groove, and each truckle assembly place is equipped with truckle anticreep rope bar, and wire rope is delivered to power on the pulley yoke (catead) through each pulley; Last two large pulley assemblies of pulley yoke (catead) or truckle assembly have determined the lifting scope of pulley yoke (catead) and corresponding worker's method to use drilling tool with respect to the distance of mast; Can increase the working range of rotary drilling rig, the multifunctionality of realization rotary drill machine through the distance of adjustment pulley and mast.
Be rigidly connected through the pulley support body between two large pulley assemblies of existing pulley yoke (catead); Can only be equipped with a kind of drilling tool of worker's method; Can not realize the multi-functional of rig; Need change pulley yoke when being replaced with CFA worker's methods such as (Continuous Flight Auger, promptly spiral drill bores stake and grouting construction method continuously), versatility is bad.Be rigidly connected through pulley yoke between two truckle assemblies, the fixed distance between the lifting heart and the mast is constant, when the bigger weight of lifting external diameter, easily with the mast interference.Therefore, how enlarging the lifting scope of truckle, how to increase the multifunctionality of the different worker's method of the adaptation drilling tool of large pulley, just become the problem that this area need solve, also is the emphasis that ability breaks through.
Summary of the invention
The object of the present invention is to provide a kind of pulley yoke that is used for rotary drilling rig,, adapt to the drilling tool of different worker's methods, and then realize the multifunctionality of rotary drilling rig to increase the head pulley working range.
Another object of the present invention is to provide a kind of pulley yoke that is used for rotary drilling rig,, avoid lifting by crane thing and mast and produce interference to increase the lifting scope of auxiliary pulley.
A purpose more of the present invention is to provide a kind of rotary drilling rig, with different job practicess of fast adaptation and different aperture, and then increases work efficiency.
The present invention adopts following technical scheme to realize above-mentioned purpose:
A kind of pulley yoke of rotary drilling rig; Comprise at least one group of pulley assembly that is installed in the rotary drilling rig mast tops; This pulley assembly cooperates with the hoisting rope of rotary drilling rig; This pulley assembly includes forearm, postbrachium and the transverse arm that is arranged on said mast tops and is separately positioned on the pulley on this forearm, the postbrachium, and the two ends of this transverse arm are connected with postbrachium with said forearm respectively, and this forearm, postbrachium and transverse arm have at least one to be scalable rod member; Realize regulating pulley and the distance between the pulley on the postbrachium on the forearm, this forearm, postbrachium have at least one rotatingly to be arranged on said mast tops.
Further, said forearm and postbrachium are connected said mast tops, and the connected mode of the connected mode of said transverse arm and said forearm, postbrachium and said mast tops and said forearm, postbrachium has at least three places to be rotatably connected.
Further, said mast tops is provided with a base, and said forearm and postbrachium are connected on this base, and the connected mode of the connected mode of said transverse arm and said forearm, postbrachium and said base and said forearm, postbrachium has at least three places to be rotatably connected.
Further; Said pulley yoke includes first pulley assembly and/or second pulley assembly at least; This first pulley assembly cooperates with the master winch wire rope of said hoisting rope; This second pulley assembly cooperates with the secondary hoisting rope of said hoisting rope; This first pulley assembly comprises forearm, postbrachium and transverse arm and is separately positioned on the pulley on this forearm, the postbrachium that the two ends of this transverse arm are connected with postbrachium with said forearm respectively, and this forearm, postbrachium and transverse arm have at least one to be scalable rod member.
Further; Said pulley yoke includes second pulley assembly; This second pulley assembly cooperates with the secondary hoisting rope of said hoisting rope; This second pulley assembly comprises forearm, postbrachium and transverse arm and is separately positioned on the pulley on this forearm, the postbrachium that the two ends of this transverse arm are connected with postbrachium with said forearm respectively, and this forearm, postbrachium and transverse arm have at least one to be scalable rod member.
Further, the connected mode of said forearm and said transverse arm, mast tops and the connected mode of said postbrachium and said transverse arm are hinged, and said postbrachium is to be fixedly connected with the connected mode of said mast tops.
Further, said postbrachium and said transverse arm, mast tops be connected and the connected mode of said forearm and said transverse arm is hinged, said forearm is to be fixedly connected with the connected mode of said mast tops.
Further, the connected mode of the connected mode of said transverse arm and said forearm, postbrachium and mast tops and forearm and postbrachium all is hinged.
Further, have at least two to be scalable rod member in said forearm, postbrachium and the transverse arm.
Further, the periphery of said pulley is provided with groove separation preventing device, and this groove separation preventing device is the outer frame shape structure of pulley groove that covers on said pulley, comprises the ear shape structure that is located at the pulley both sides and is connected rod-like structure between the said ear shape structure.
Further, said scalable rod member is hydraulic cylinder, cylinder or the many rod member combinations that connect together.
Further, said being rotatably connected to hinged.
Further, said base one side is hinged on said mast tops, and all the other sides of this base are connected said mast tops through bolt.
A kind of rotary drilling rig is provided with the pulley yoke of aforesaid rotary drilling rig.
Rotary drilling rig provided by the invention and pulley yoke thereof have significant beneficial effect.At first; Therefore in three rod members of first pulley assembly scalable rod member is arranged, can adjust the distance between two pulleys of first pulley assembly, change the distance between lifting head sheave and the mast; Thereby make rotary drilling rig under the prerequisite of not changing pulley yoke; Be able to use the used drilling tool of different worker's methods, increased the scope of application of rotary drilling rig, realize the multifunctionality of rotary drilling rig.Secondly, in three rod members of second pulley assembly scalable rod member is arranged, therefore can adjust two distances between the truckle, and then can change the distance between the lifting heart and the mast, increased the lifting scope of truckle, avoid lifting by crane thing and mast and produce interference.In addition, because the rod member of pulley yoke can shrink, thus when travel position, can reduce the height of complete machine, convenient and swift.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the embodiment of the invention one;
Fig. 2 is the schematic diagram of embodiment one;
Fig. 3 is the structural representation of the embodiment of the invention two;
Fig. 4 is the schematic diagram of embodiment two;
Fig. 5 is the schematic diagram of the embodiment of the invention three.
Description of reference numerals:
The 1-forearm, 2-postbrachium, 3-hydraulic cylinder, 4-large pulley, 5-truckle, 6-anticreep channel bar, 7-hinge, 8-base, 9-transverse arm.
The specific embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Embodiment one
Fig. 1 and Fig. 2 are the relevant drawings of present embodiment, and shown in figure, this device is a kind of pulley yoke that is used for rotary drilling rig; In general it comprises the base 8 of the mast tops that is installed in rotary drilling rig and is installed in first pulley assembly and second pulley assembly on the base 8, in practical application; First pulley assembly is the bigger large pulley assembly of diameter of pulley, and second pulley assembly is the less truckle assembly of diameter of pulley, and this large pulley assembly cooperates with the master winch wire rope; This truckle assembly cooperates with secondary hoisting rope, and the side and the mast tops of this base 8 are rotatably connected, in the present embodiment; Be rotatably connected mainly and refer to hinged but be not limited to hinged form; Three limits can be connected mast tops with bolt in addition, like this, and when mast fell; The bolt of can dismantling is folded up pulley yoke and mast, so that transportation.This large pulley assembly includes forearm 1, postbrachium 2 and a hydraulic cylinder 3; One end of forearm 1 is hinged on the base 8 through hinge 7; The piston rod of the other end and hydraulic cylinder 3 is hinged through hinge 7, and an end of postbrachium 2 is fixedly connected on the base 8, and the cylinder body of the other end and hydraulic cylinder 3 is hinged through hinge 7; The end that an end that is connected with hydraulic cylinder 3 at forearm 1 and postbrachium 2 are connected with hydraulic cylinder 3 is respectively equipped with large pulley 4; Be used for cooperating with the master winch wire rope, forearm 1, postbrachium 2, hydraulic cylinder 3 can constitute a four-bar mechanism wide at the top and narrow at the bottom jointly with base 8 like this, and can rotate through the telescopic drive forearm 1 of hydraulic cylinder 3; Thereby regulate two distances between the large pulley 4, and then reach drilling tool, the polyfunctional purpose of realization rotary drilling rig that increases the head pulley working range, adapts to different worker's methods.Be equipped with groove separation preventing device in these two large pulley 4 peripheries; This groove separation preventing device comprises ear shape structure that is located at large pulley 4 both sides and the anticreep channel bar 6 that is connected ear shape structure top; These two ear shape structures and frame shape structure that roughly takes the shape of the letter U that covers on the pulley groove periphery of large pulley 4 of anticreep channel bar 6 common formations are deviate from the pulley groove of large pulley 4 in order to prevent the master winch wire rope.In the present embodiment, the structure basically identical of the structure of truckle assembly and large pulley assembly, the pulley of truckle assembly are two truckles 5, and the size of other parts also just is slightly less than the size of large pulley assembly, therefore repeat no more.This structure of truckle 5 employings also can be regulated the distance of two truckles 5 through hydraulic cylinder 3, and then reaches the lifting scope that increases auxiliary pulley, the purpose of avoiding lifting by crane thing and mast generation interference.
Other flexible embodiments as present embodiment can not be provided with base 8, directly large pulley assembly and truckle assembly are connected mast tops; Two pulley assemblies can have only one to adopt hydraulic cylinder to regulate the distance between two pulleys, and another uses the pulley assembly of existing unadjustable pulley distance; Hydraulic cylinder also can adopt other scalable rod member replacement, like many rod member combinations that connect together or cylinder etc.
Embodiment two
Fig. 3 and Fig. 4 are the relevant drawings of present embodiment, shown in figure, compare with embodiment one, in the present embodiment; The lower end of forearm 1 is fixedly connected with base 8, the hinged non-telescoping transverse arm 9 in upper end, and postbrachium is set to telescopic hydraulic cylinder 3; The cylinder body of this hydraulic cylinder 3 and base 8 are hinged, and the other end of piston rod and transverse arm 9 is hinged, in addition; Present embodiment is consistent with the 26S Proteasome Structure and Function of embodiment one, therefore, repeats no more at this.
Same, other the flexible embodiments as present embodiment also can not be provided with base, directly large pulley assembly and truckle assembly are connected mast tops; Two pulley assemblies can have only one to adopt hydraulic cylinder to regulate the distance between two pulleys, and another uses the pulley assembly of existing unadjustable pulley distance; Can forearm be set to hydraulic cylinder and hinged with transverse arm, base respectively, postbrachium is non-telescoping rod member, and postbrachium one end is fixedly connected on the base, and the other end and transverse arm are hinged; Hydraulic cylinder also can adopt other scalable rod member replacement, like many rod member combinations that connect together or cylinder etc.
Embodiment three
Fig. 5 is the relevant drawings of present embodiment, shown in figure, compares with embodiment two; In the present embodiment; Forearm and postbrachium all are set to hydraulic cylinder 3, and the two ends of hydraulic cylinder 3 also all are to be connected with base 8 with transverse arm 9 in hinged way, in addition; Present embodiment is consistent with the 26S Proteasome Structure and Function of embodiment two, therefore repeats no more.
Same, other the flexible embodiments as present embodiment also can not be provided with base 8, directly large pulley assembly and truckle assembly are connected mast tops; Two pulley assemblies can have only a distance that adopts hydraulic cylinder 3 to regulate between two pulleys, and another uses the pulley assembly of existing unadjustable pulley distance; Can forearm and transverse arm be set to hydraulic cylinder 3, perhaps postbrachium and transverse arm are set to hydraulic cylinder; Forearm, postbrachium and transverse arm 9 all are set to telescopic hydraulic cylinder; Hydraulic cylinder also can adopt other scalable rod member replacement, like many rod member combinations that connect together or cylinder etc.
Except the pulley yoke of above-mentioned rotary drilling rig, the present invention also provides a kind of rotary drilling rig with pulley yoke of above-mentioned rotary drilling rig, and the structure of other each several part of this rotary drilling rig is with reference to prior art, and this paper repeats no more.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (12)

1. the pulley yoke of a rotary drilling rig; Comprise at least one group of pulley assembly that is installed in the rotary drilling rig mast tops; This pulley assembly cooperates with the hoisting rope of rotary drilling rig; It is characterized in that; Said pulley assembly includes forearm (1), postbrachium (2) and the transverse arm (9) that is arranged on said mast tops and is separately positioned on the pulley on this forearm (1), the postbrachium (2); The two ends of this transverse arm (9) are connected with postbrachium (2) with said forearm (1) respectively, and this forearm (1), postbrachium (2) and transverse arm (9) have one at least for scalable rod member, and this forearm (1), postbrachium (2) have at least one rotatingly to be arranged on said mast tops.
2. the pulley yoke of rotary drilling rig according to claim 1; It is characterized in that; Said forearm (1) and postbrachium (2) are connected said mast tops, and the connected mode of the connected mode of said transverse arm (9) and said forearm (1), postbrachium (2) and said mast tops and said forearm (1), postbrachium (2) has at least three places to be rotatably connected.
3. the pulley yoke of rotary drilling rig according to claim 1; It is characterized in that; Said mast tops is provided with a base (8); Said forearm (1) and postbrachium (2) are connected on this base (8), and the connected mode of said transverse arm (9) and said forearm (1), postbrachium (2) and said base (8) have at least three places to be rotatably connected with the connected mode of said forearm (1), postbrachium (2).
4. according to the pulley yoke of claim 1,2 or 3 described rotary drilling rigs; It is characterized in that; Said pulley yoke includes first pulley assembly and/or second pulley assembly at least; This first pulley assembly cooperates with the master winch wire rope of said hoisting rope, and this second pulley assembly cooperates with the secondary hoisting rope of said hoisting rope.
5. according to the pulley yoke of claim 1,2 or 3 described rotary drilling rigs; It is characterized in that; Said forearm (1) is hinged with the connected mode of said transverse arm (9), mast tops and the connected mode of said postbrachium (2) and said transverse arm (9), and said postbrachium (2) is to be fixedly connected with the connected mode of said mast tops.
6. according to the pulley yoke of claim 1,2 or 3 described rotary drilling rigs; It is characterized in that; Said postbrachium (2) is hinged with the connected mode of said transverse arm (9), mast tops and the connected mode of said forearm (1) and said transverse arm (9), and said forearm (1) is to be fixedly connected with the connected mode of said mast tops.
7. according to the pulley yoke of claim 1,2 or 3 described rotary drilling rigs, it is characterized in that, said transverse arm (9) and said forearm (1), postbrachium (2) be connected and the connected mode of mast tops and forearm (1) and postbrachium (2) all is hinged.
8. according to the pulley yoke of claim 1,2 or 3 described rotary drilling rigs, it is characterized in that having at least two to be scalable rod member in said forearm (1), postbrachium (2) and the transverse arm (9).
9. according to the pulley yoke of claim 1,2 or 3 described rotary drilling rigs; It is characterized in that; The periphery of said pulley is provided with groove separation preventing device; This groove separation preventing device is the outer frame shape structure of pulley groove that covers on said pulley, comprises the ear shape structure that is located at the pulley both sides and is connected rod-like structure between the said ear shape structure.
10. according to the pulley yoke of claim 1,2 or 3 described rotary drilling rigs, it is characterized in that said scalable rod member is hydraulic cylinder, cylinder or the many rod member combinations that connect together.
11. the pulley yoke of rotary drilling rig according to claim 3 is characterized in that, said base (8) one sides are hinged on said mast tops, and all the other sides of this base (8) are connected said mast tops through bolt.
12. a rotary drilling rig is characterized in that, is provided with the pulley yoke of any described rotary drilling rig of claim 1 to 11.
CN201210170414XA 2012-05-28 2012-05-28 Rotary drilling rig and pulley yoke thereof Pending CN102691483A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210170414XA CN102691483A (en) 2012-05-28 2012-05-28 Rotary drilling rig and pulley yoke thereof

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Application Number Priority Date Filing Date Title
CN201210170414XA CN102691483A (en) 2012-05-28 2012-05-28 Rotary drilling rig and pulley yoke thereof

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CN102691483A true CN102691483A (en) 2012-09-26

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104775756A (en) * 2015-04-29 2015-07-15 北京南车时代机车车辆机械有限公司 Truck-mounted drilling rig, mast assembly of drilling rig and auxiliary cathead device
CN111726739A (en) * 2020-07-08 2020-09-29 程鹏 Self-generating communication broadcasting station convenient to install
CN112610166A (en) * 2020-12-15 2021-04-06 江苏徐工工程机械研究院有限公司 Goose head device for drilling machine and drilling machine
CN113107397A (en) * 2021-05-14 2021-07-13 徐州徐工基础工程机械有限公司 Foldable goose head structure with stepless adjustable drilling center distance
CN114032899A (en) * 2021-11-26 2022-02-11 福建冶地恒元建设有限公司 Slope reinforcing device for geotechnical engineering investigation and construction and reinforcing method thereof

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US4371046A (en) * 1980-04-21 1983-02-01 Vernon Read Apparatus for and method of drilling a hole into the ground
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CN101781970A (en) * 2009-08-28 2010-07-21 北京南车时代重工机械有限责任公司 Steel wire rope guide device used for rotary drilling rig and rotary drilling rig
CN101913540A (en) * 2010-06-28 2010-12-15 北京市三一重机有限公司 Rotary drilling rig and wire rope guiding device thereof
CN101934991A (en) * 2010-08-24 2011-01-05 北京市三一重机有限公司 Lifting mechanism and rotary drilling rig
CN201763259U (en) * 2010-09-09 2011-03-16 北京南车时代机车车辆机械有限公司 Rotary drilling rig and cathead thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4371046A (en) * 1980-04-21 1983-02-01 Vernon Read Apparatus for and method of drilling a hole into the ground
CN201297131Y (en) * 2008-12-04 2009-08-26 郑州宇通重工有限公司 A luffing mechanism of rotary dig drill machine mast top pulley support
CN101781970A (en) * 2009-08-28 2010-07-21 北京南车时代重工机械有限责任公司 Steel wire rope guide device used for rotary drilling rig and rotary drilling rig
CN101913540A (en) * 2010-06-28 2010-12-15 北京市三一重机有限公司 Rotary drilling rig and wire rope guiding device thereof
CN101934991A (en) * 2010-08-24 2011-01-05 北京市三一重机有限公司 Lifting mechanism and rotary drilling rig
CN201763259U (en) * 2010-09-09 2011-03-16 北京南车时代机车车辆机械有限公司 Rotary drilling rig and cathead thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104775756A (en) * 2015-04-29 2015-07-15 北京南车时代机车车辆机械有限公司 Truck-mounted drilling rig, mast assembly of drilling rig and auxiliary cathead device
CN111726739A (en) * 2020-07-08 2020-09-29 程鹏 Self-generating communication broadcasting station convenient to install
CN111726739B (en) * 2020-07-08 2022-01-07 扬州科丰高新产业投资开发集团有限公司 Self-generating communication broadcasting station convenient to install
CN112610166A (en) * 2020-12-15 2021-04-06 江苏徐工工程机械研究院有限公司 Goose head device for drilling machine and drilling machine
CN112610166B (en) * 2020-12-15 2022-09-06 江苏徐工工程机械研究院有限公司 Goose head device for drilling machine and drilling machine
CN113107397A (en) * 2021-05-14 2021-07-13 徐州徐工基础工程机械有限公司 Foldable goose head structure with stepless adjustable drilling center distance
CN114032899A (en) * 2021-11-26 2022-02-11 福建冶地恒元建设有限公司 Slope reinforcing device for geotechnical engineering investigation and construction and reinforcing method thereof

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Application publication date: 20120926