CN201786244U - Rotary drilling rig - Google Patents
Rotary drilling rig Download PDFInfo
- Publication number
- CN201786244U CN201786244U CN2010205547479U CN201020554747U CN201786244U CN 201786244 U CN201786244 U CN 201786244U CN 2010205547479 U CN2010205547479 U CN 2010205547479U CN 201020554747 U CN201020554747 U CN 201020554747U CN 201786244 U CN201786244 U CN 201786244U
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Abstract
The utility model provides a rotary drilling rig, comprising a mast (1), and a main hoist (2) and an auxiliary hoist (3) installed on the mast (1), a wire rope of the main hoist (2) bypasses a main hoist pulley (5) installed on a main hoist pulley rack (4), a wire rope of the auxiliary hoist (3) bypasses an auxiliary hoist pulley (7) installed on an auxiliary hoist pulley rack (6), the auxiliary hoist pulley rack (6) is fixed at the top of the mast (1), and is detachably connected with the mast (1); one side of the auxiliary hoist pulley rack and the mast is in a pin shaft connection, the other side is in a bolt connection, when the rotary drilling rig works in lower space or under wires and cables, the bolt can be detached, the auxiliary hoist pulley rack rotates around the pin shaft, and is placed at one side of the mast, the auxiliary hoist pulley rack detachably connected with the mast can be detached, to reduce height of the drilling rig, and improve adaptability of work in lower space.
Description
Technical field
The utility model relates to engineering machinery field, particularly a kind of rotary drilling rig.
Background technology
Along with the fast development of China's economic construction, market increases day by day for the demand of the especially various rigs of engineering machinery.The work progress of modern construction engineering generally all begins with pile foundation construction, and therefore, it is particularly important that pile hole construction seems, rotary drilling rig is applied in the stake hole operation of different geological conditionss with advantages such as its higher production efficiency increasingly extensively.
A kind of typical rotary drilling rig comprises walking mechanism, on all fixing chassis with walking mechanism of parts such as the mast of rotary drilling rig, various control device, drilling rod is installed in the mast outside by winding plant, realize the motion of drilling rod by the folding and unfolding of elevator, end at drilling rod is equipped with unit head and drill bit, 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 installed with catead, winding plant comprises master winch and secondary elevator, be installed with master winch bracing frame and secondary elevator bracing frame on the catead, master winch is fixedly installed on the catead by the master winch bracing frame, secondary elevator is fixedly installed on the catead by secondary elevator bracing frame, master winch and secondary elevator are used for changing the direction of motion of winding plant wire rope, play a supporting role when the lifting of drilling rod, decline and lifting.
When rotary drilling rig is worked in comparatively short space, how under the prerequisite that guarantees basic functions such as excavation, boring, the compact housing construction of trying one's best improves space availability ratio, and reduces the complete machine height when being necessary and just become the problem that those skilled in the art need solve.
The utility model content
The purpose of this utility model provides a kind of rotary drilling rig, and it can reduce the complete machine height when being necessary, improves its compliance at short job space.
For solving the problems of the technologies described above, the utility model provides a kind of rotary drilling rig, comprises mast and the winding plant that is installed on described mast, and the wire rope of the master winch of described winding plant is walked around the master winch pulley that is installed on the master winch pulley yoke.
Preferably, described winding plant also comprises auxilliary elevator, and the wire rope of described auxilliary elevator is walked around the auxilliary elevator pulley that is installed on the auxilliary elevator pulley yoke, and described auxilliary elevator pulley yoke is fixed in the top of described mast, and is connected removably with described mast.
Preferably, a side of described auxilliary elevator pulley yoke is connected removably with described mast, and its opposite side is connected by bearing pin with described mast, and described auxilliary elevator pulley yoke can rotate around described bearing pin.
Preferably, described auxilliary elevator pulley yoke is a triangular structure; One side of described auxilliary elevator pulley yoke is connected with described mast bolt, and its opposite side is connected with described mast bearing pin, and described auxilliary elevator pulley is installed on the top of described auxilliary elevator pulley yoke.
Preferably, the end of the wire rope of described master winch is fixed in the drilling rod of described rotary drilling rig.
Preferably, described winding plant also comprises auxilliary elevator, and the wire rope of described auxilliary elevator is walked around the auxilliary elevator pulley that is installed on the auxilliary elevator pulley yoke, and described auxilliary elevator pulley yoke is fixed in the sidewall of described mast, and it highly is lower than the top of described mast.
Preferably, described winding plant only has master winch.
Preferably, described mast has the inner chamber that axially runs through along it, and the drilling rod of described rotary drilling rig is installed in the inner chamber of described mast.
Preferably, the unit head of described rotary drilling rig is fixed in the top of described mast, the top of described drilling rod and described unit head are in transmission connection, described master winch pulley yoke is fixedlyed connected with described mast by described unit head, and described auxilliary elevator pulley yoke is connected with described mast removably by described unit head.
Preferably, the sidewall of described mast offers along its axially extended guide rail, and the pressurization oil cylinder is slidingly connected to described guide rail by balladeur train, and described balladeur train is fixedlyed connected with the swing arm of described rotary drilling rig, fixedlys connected with described mast in the lower end of described pressurization oil cylinder.
Preferably, also comprise rotating disk, an end of described rotating disk is connected with bucket arm cylinder with described swing arm, and its other end is fixedlyed connected with described balladeur train.
Preferably, described rotating disk is connected by bearing pin with bucket arm cylinder with described swing arm.
Preferably, also comprise damper, described damper is installed on the lower end of described mast.
The utility model provides a kind of rotary drilling rig, comprise mast and the master winch and the auxilliary elevator that are installed on described mast, the wire rope of described master winch is walked around the master winch pulley that is installed on the master winch pulley yoke, and the wire rope of described auxilliary elevator is walked around the auxilliary elevator pulley that is installed on the auxilliary elevator pulley yoke; Described auxilliary elevator pulley yoke is fixed in the top of described mast, and should be connected removably with described mast by auxilliary elevator pulley yoke.Like this,, can will pull down,, improve its compliance at short job space so that reduce the height of body with the auxilliary elevator pulley yoke that mast is connected removably when rotary drilling rig is worked under shorter space or electric wire.
A kind of preferred embodiment in, one side of the auxilliary elevator pulley yoke of rotary drilling rig provided by the utility model is connected removably with described mast, its opposite side is connected by connecting axle with described mast, and an above-mentioned side can be rotated around connecting axle under the effect of external force.Like this, when needs reduce height, a side that only needs to assist the elevator pulley yoke is pulled down from mast, at this moment, auxilliary elevator pulley yoke can rotate by the connecting axle around its opposite side and mast under the effect of gravity, thereby makes auxilliary elevator pulley yoke swing to a side of mast, not only reduced the complete machine height, and need not auxilliary elevator pulley yoke is pulled down, simplified the dismounting process process, improved operating efficiency.
Description of drawings
Fig. 1 is the structural representation of a kind of specific embodiment of rotary drilling rig provided by the utility model in main apparent direction;
Fig. 2 is the structural representation of rotary drilling rig shown in Figure 1 in the side-looking direction.
The specific embodiment
Core of the present utility model provides a kind of rotary drilling rig, and it can reduce the complete machine height when being necessary, improves its compliance at short job space.
In order to make those skilled in the art person understand the technical solution of the utility model better, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the structural representation of a kind of specific embodiment of rotary drilling rig provided by the utility model in main apparent direction; Fig. 2 is the structural representation of rotary drilling rig shown in Figure 1 in the side-looking direction.
Rotary drilling rig provided by the utility model comprises mast 1 and is installed on the winding plant of described mast 1, this winding plant only has master winch 2, the wire rope of master winch 2 is walked around the master winch pulley 5 that is installed on the master winch pulley yoke 4, because this rotary drilling rig does not have auxilliary elevator structure, thereby has reduced the height of complete machine.
In a kind of specific embodiment, rotary drilling rig provided by the utility model comprises mast 1, master winch 2 and auxilliary elevator 3, its middle mast 1 is installed on the swing arm 13 of rotary drilling rig, master winch 2 and auxilliary elevator 3 all are installed on the mast 1, the top of mast 1 is installed with master winch pulley yoke 4, master winch pulley 5 is installed on the master winch pulley yoke 4, the wire rope of master winch 2 is walked around the master winch pulley 5 that is installed on the master winch pulley yoke 4, and the end of the wire rope of this master winch 2 is fixed in drilling rod 8, auxilliary elevator pulley yoke 6 also is installed on the top of mast, and auxilliary elevator pulley yoke 6 is installed on the mast 1 removably, auxilliary elevator pulley 7 is installed on the auxilliary elevator pulley yoke 6, the wire rope of auxilliary elevator 3 is walked around the auxilliary elevator pulley 7 that is installed on the auxilliary elevator pulley yoke 6, and the end of the wire rope of auxilliary elevator 3 is fixed in drilling rod 8 workpiece in addition.
Above-mentioned master winch 2 and auxilliary elevator 3 can all be installed on a side of mast 1.
In the course of work of rotary drilling rig, master winch 2 is by its wire rope pulling drilling rod 8, and in some operation, also needs to lift reinforcing cage or other weights, and the end of the wire rope of auxilliary elevator 3 is used for just these weights.When in some operation, when need not to lift reinforcing cage and other weights, auxilliary elevator 3 can leave unused.
The mast 1 of rotary drilling rig provided by the present invention is installed on the swing arm 13, swing arm 13 is installed on the rotating part, rotating part is installed on the chassis, the chassis is the part of running gear, the running gear of this rotary drilling rig can be wheeledly also can be crawler type, and rotating part can rotate on himself plane with respect to the chassis.
Fixedly connected with hinged form between swing arm 13 and the rotating part, and swing arm 13 can rotate around jointed shaft with respect to rotating part under the driving of external force.Particularly, between swing arm 13 and rotating part, support cylinder can be installed, swing up and down on perpendicular around jointed shaft thereby support cylinder elongation or shorten drives swing arm 13.Swing arm 13 also is not limited to by hinged mode with rotating part and is connected, and both fixedly connected modes also can be conventional other modes of using in this area, for example articulates, welding etc.
Rotary drilling rig provided by the utility model also can be multi-functional rotary drilling rig, just not only can be used for excavating but also can be used for holing and reaming.When rotary drilling rig is used for digging operation, dipper and scraper bowl are installed on the swing arm 13, when rotary drilling rig is used for reaming or boring, pull down dipper and scraper bowl on the swing arm 13, drilling rod 8 and drilling bucket are installed on the swing arm 13.
This rotary drilling rig can be less model, and its mast 1 can be shorter, and mast 1 length can be 5m～7m, and its mast 1 can be divided into detachably the plurality of sections that connects, and can connect removably by bolted mode between each section mast 1.
When rotary drilling rig is worked under shorter space or electric wire, can will pull down with the auxilliary elevator pulley yoke 6 that mast 1 is connected removably, so that reduce the height of body, improve its compliance at short job space.
One side of auxilliary elevator pulley yoke 6 is connected removably with mast 1, and its opposite side and mast 1 are connected by bearing pin, and auxilliary elevator pulley yoke 6 can rotate around bearing pin; Like this, when needs reduce height, a side that only needs to assist elevator pulley yoke 6 is pulled down from mast 1, at this moment, auxilliary elevator pulley yoke 6 can rotate by the bearing pin around its opposite side and mast 1 under the effect of gravity, thereby makes auxilliary elevator pulley yoke 6 swing to a side of mast 1, not only reduced the complete machine height, and need not auxilliary elevator pulley yoke 6 is pulled down, simplified the dismounting process process, improved operating efficiency.
Auxilliary elevator pulley yoke 6 also is not limited to by above-mentioned concrete structure and is installed on the mast 1, it also can be installed on mast 1 respectively removably with its first end and second end, when needs reduce the complete machine height of rotary drilling rig, only need to assist elevator pulley yoke 6 with pulling down on the mast 1 and placing in addition, also can realize reducing the purpose of complete machine height.
Apparently, for convenient disassembly and realize when first end after pulling down on the mast 1, auxilliary elevator pulley yoke 6 can be realized rotating around connecting axle, assists first end of elevator pulley yoke 6 and the same side that second end should be installed on mast 1.
Auxilliary elevator pulley yoke 6 can be triangular structure, and this moment, one side of auxilliary elevator pulley yoke 6 realized being connected removably by bolted mode with mast 1, and its opposite side is connected with mast 1 bearing pin, and auxilliary elevator pulley 7 is installed on the top of auxilliary elevator pulley yoke 6.
The mast 1 of rotary drilling rig provided by the utility model can have the inner chamber that axially runs through along it, the drilling rod 8 of rotary drilling rig is installed in the inner chamber of mast 1, drilling rod 8 is built in the inside of mast 1, thereby the compact structure of rotary drilling rig has improved space availability ratio.
The unit head 9 of rotary drilling rig provided by the utility model can be fixed in the top of mast 1, the top of drilling rod 8 and unit head 9 are in transmission connection, master winch pulley yoke 4 is fixedlyed connected with mast 1 by unit head 9, and auxilliary elevator pulley yoke 6 is connected with mast 1 removably by unit head 9; Unit head 9 can be installed on the top of mast 1 by bolted mode, this unit head 9 can adopt the type of drive of the two reductors of all-hydraulic double motor, this arrangement can provide bigger power output, and directly drives the drilling rod 8 that is built in the mast 1.
Apparently, unit head 9 also is not limited to the top that is installed on mast 1, and it also can for example be installed on the lower end of drilling rod 8 with reference to the conventional installation site in this area.
The sidewall of mast 1 offers along its axially extended guide rail 10, and pressurization oil cylinder 11 is slidingly connected to guide rail 10 by balladeur train 12, and balladeur train 12 is fixedlyed connected with the swing arm 13 of rotary drilling rig, fixedlys connected with mast 1 in the lower end of pressurization oil cylinder 11; 12 designs of pressurization balladeur train have slippage slot, slippage slot is buckled on the guide rail of offering on mast 1 main body 10, pressurization oil cylinder 11 lower ends are connected with bearing pin with mast 1 lower end, the upper end is connected with pressurization balladeur train 12, when 11 motions of pressurization oil cylinder, drives mast 1 and moves on pressurization balladeur train 12, realize pressurization, adopt this direct pressing mode, pressurization efficient is higher, and structure is comparatively simple.
Rotary drilling rig provided by the utility model can also comprise rotating disk 14, and an end of rotating disk 14 is connected with swing arm 13, and its other end is fixedlyed connected with balladeur train 12.
Rotating disk 14 can be connected by bearing pin with swing arm 13, in the time of need laying down workpiece such as its dipper or mast 1 like this when rotary drilling rig, only need the bearing pin between rotating disk 14 and the swing arm 13 is pulled down, promptly can realize fractionation, disassembly process is comparatively simple, has improved the function conversion efficiency.
Rotary drilling rig provided by the utility model can also comprise damper, and this damper is installed on the lower end of mast 1, so that prevent to propose the influence of shock and vibration bigger when boring to mast 1 and main frame.
It is to be noted, multifunctional rotary excavating driller provided by the utility model is not only to comprise above-mentioned each component, it also comprises necessary other component of the instructions for use that realizes multifunctional rotary excavating driller, and these component and inventive point of the present utility model are got in touch less, do not repeat them here.
More than a kind of rotary drilling rig provided by the utility model is described in detail.Used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (13)
1. a rotary drilling rig is characterized in that, comprises mast (1) and is installed on the winding plant of described mast (1), and the wire rope of the master winch of described winding plant (2) is walked around the master winch pulley (5) that is installed on the master winch pulley yoke (4).
2. rotary drilling rig according to claim 1, it is characterized in that, described winding plant also comprises auxilliary elevator (3), the wire rope of described auxilliary elevator (3) is walked around the auxilliary elevator pulley (7) that is installed on the auxilliary elevator pulley yoke (6), described auxilliary elevator pulley yoke (6) is fixed in the top of described mast (1), and is connected removably with described mast (1).
3. rotary drilling rig according to claim 2, it is characterized in that, one side of described auxilliary elevator pulley yoke (6) is connected removably with described mast (1), and its opposite side is connected by bearing pin with described mast (1), and described auxilliary elevator pulley yoke (6) can rotate around described bearing pin.
4. rotary drilling rig according to claim 3 is characterized in that, described auxilliary elevator pulley yoke (6) is a triangular structure; One side of described auxilliary elevator pulley yoke (6) is connected with described mast (1) bolt, and its opposite side is connected with described mast (1) bearing pin, and described auxilliary elevator pulley (7) is installed on the top of described auxilliary elevator pulley yoke (6).
5. rotary drilling rig according to claim 4 is characterized in that, the end of the wire rope of described master winch (2) is fixed in the drilling rod (8) of described rotary drilling rig.
6. rotary drilling rig according to claim 1, it is characterized in that, described winding plant also comprises auxilliary elevator (3), the wire rope of described auxilliary elevator (3) is walked around the auxilliary elevator pulley (7) that is installed on the auxilliary elevator pulley yoke (6), described auxilliary elevator pulley yoke (6) is fixed in the sidewall of described mast (1), and it highly is lower than the top of described mast (1).
7. rotary drilling rig according to claim 1 is characterized in that, described winding plant only has master winch (2).
8. according to each described rotary drilling rig of claim 1 to 7, it is characterized in that described mast (1) has the inner chamber that axially runs through along it, the drilling rod of described rotary drilling rig (8) is installed in the inner chamber of described mast (1).
9. rotary drilling rig according to claim 8, it is characterized in that, the unit head of described rotary drilling rig (9) is fixed in the top of described mast (1), the top of described drilling rod (8) and described unit head (9) are in transmission connection, described master winch pulley yoke (4) is fixedlyed connected with described mast (1) by described unit head (9), and described auxilliary elevator pulley yoke (6) is connected with described mast (1) removably by described unit head (9).
10. according to each described rotary drilling rig of claim 1 to 7, it is characterized in that, the sidewall of described mast (1) offers along its axially extended guide rail (10), pressurization oil cylinder (11) is slidingly connected to described guide rail (10) by balladeur train (12), described balladeur train (12) is fixedlyed connected with the swing arm (13) of described rotary drilling rig, fixedlys connected with described mast (1) in the lower end of described pressurization oil cylinder (11).
11. rotary drilling rig according to claim 10 is characterized in that, also comprises rotating disk (14), an end of described rotating disk (14) is connected with bucket arm cylinder with described swing arm (13), and its other end is fixedlyed connected with described balladeur train (12).
12. rotary drilling rig according to claim 11 is characterized in that, described rotating disk (14) is connected by bearing pin with bucket arm cylinder with described swing arm (13).
13., it is characterized in that also comprise damper, described damper is installed on the lower end of described mast (1) according to each described rotary drilling rig of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205547479U CN201786244U (en) | 2010-09-30 | 2010-09-30 | Rotary drilling rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205547479U CN201786244U (en) | 2010-09-30 | 2010-09-30 | Rotary drilling rig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201786244U true CN201786244U (en) | 2011-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205547479U Expired - Lifetime CN201786244U (en) | 2010-09-30 | 2010-09-30 | Rotary drilling rig |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201786244U (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425372A (en) * | 2011-12-14 | 2012-04-25 | 唐忠盛 | Vibration Drilling Drilling Rig |
| CN102434091A (en) * | 2011-11-28 | 2012-05-02 | 上海中联重科桩工机械有限公司 | Rotary drilling rig and power head damping system and method thereof |
| CN103161403A (en) * | 2011-12-19 | 2013-06-19 | 上海金泰工程机械有限公司 | Excavator with rotary drilling rig |
| CN103821458A (en) * | 2014-02-28 | 2014-05-28 | 洛阳东方金属结构有限公司 | Rotary drilling rig with auxiliary supporting device |
| CN103912222A (en) * | 2014-01-03 | 2014-07-09 | 上海中联重科桩工机械有限公司 | Sliding assembly, rotary drilling rig and mast device assembly thereof, and disassembly-free transportation method of pressurizing oil cylinder of mast of rotary drilling rig |
| CN104196462A (en) * | 2014-08-27 | 2014-12-10 | 桂林市华力重工机械有限责任公司 | Rotating disc type deflection drill arm structure |
| CN105089491A (en) * | 2015-07-27 | 2015-11-25 | 北京市三一重机有限公司 | Rotary drilling rig |
| CN105804665A (en) * | 2016-05-13 | 2016-07-27 | 重庆勤牛工程机械有限责任公司 | Direct operated arm assembly for high-speed hydraulic drilling rig |
| CN105909170A (en) * | 2016-05-13 | 2016-08-31 | 重庆勤牛工程机械有限责任公司 | High-speed hydraulic drilling rig with monomotor |
| CN106014203A (en) * | 2016-05-13 | 2016-10-12 | 重庆勤牛工程机械有限责任公司 | High-speed hydraulic drill with two engines |
| CN106014197A (en) * | 2016-07-22 | 2016-10-12 | 江苏泰信机械科技有限公司 | Drill pipe embedded and power head bottom driven rotary drilling rig |
| CN107288543A (en) * | 2017-08-17 | 2017-10-24 | 刘长文 | A kind of rotary drilling rig quickly enters the device of rock |
| CN110485946A (en) * | 2019-09-16 | 2019-11-22 | 北京中车重工机械有限公司 | A kind of master winch |
-
2010
- 2010-09-30 CN CN2010205547479U patent/CN201786244U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434091A (en) * | 2011-11-28 | 2012-05-02 | 上海中联重科桩工机械有限公司 | Rotary drilling rig and power head damping system and method thereof |
| CN102425372A (en) * | 2011-12-14 | 2012-04-25 | 唐忠盛 | Vibration Drilling Drilling Rig |
| CN103161403A (en) * | 2011-12-19 | 2013-06-19 | 上海金泰工程机械有限公司 | Excavator with rotary drilling rig |
| CN103912222B (en) * | 2014-01-03 | 2016-03-09 | 上海中联重科桩工机械有限公司 | Sliding assembly, rotary drilling rig, mast device assembly and pressurization oil cylinder transportation method |
| CN103912222A (en) * | 2014-01-03 | 2014-07-09 | 上海中联重科桩工机械有限公司 | Sliding assembly, rotary drilling rig and mast device assembly thereof, and disassembly-free transportation method of pressurizing oil cylinder of mast of rotary drilling rig |
| CN103821458A (en) * | 2014-02-28 | 2014-05-28 | 洛阳东方金属结构有限公司 | Rotary drilling rig with auxiliary supporting device |
| CN104196462A (en) * | 2014-08-27 | 2014-12-10 | 桂林市华力重工机械有限责任公司 | Rotating disc type deflection drill arm structure |
| CN105089491A (en) * | 2015-07-27 | 2015-11-25 | 北京市三一重机有限公司 | Rotary drilling rig |
| CN105804665A (en) * | 2016-05-13 | 2016-07-27 | 重庆勤牛工程机械有限责任公司 | Direct operated arm assembly for high-speed hydraulic drilling rig |
| CN105909170A (en) * | 2016-05-13 | 2016-08-31 | 重庆勤牛工程机械有限责任公司 | High-speed hydraulic drilling rig with monomotor |
| CN106014203A (en) * | 2016-05-13 | 2016-10-12 | 重庆勤牛工程机械有限责任公司 | High-speed hydraulic drill with two engines |
| CN106014197A (en) * | 2016-07-22 | 2016-10-12 | 江苏泰信机械科技有限公司 | Drill pipe embedded and power head bottom driven rotary drilling rig |
| CN107288543A (en) * | 2017-08-17 | 2017-10-24 | 刘长文 | A kind of rotary drilling rig quickly enters the device of rock |
| CN107288543B (en) * | 2017-08-17 | 2020-01-17 | 刘长文 | Device for rapidly entering rock of rotary drilling rig |
| CN110485946A (en) * | 2019-09-16 | 2019-11-22 | 北京中车重工机械有限公司 | A kind of master winch |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110406 |
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| CX01 | Expiry of patent term |