CN204609762U - Outstanding rail rock drilling machine - Google Patents
Outstanding rail rock drilling machine Download PDFInfo
- Publication number
- CN204609762U CN204609762U CN201520124426.8U CN201520124426U CN204609762U CN 204609762 U CN204609762 U CN 204609762U CN 201520124426 U CN201520124426 U CN 201520124426U CN 204609762 U CN204609762 U CN 204609762U
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- rock drilling
- hydraulic cylinder
- drilling device
- control arm
- walking
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Abstract
A kind of outstanding rail rock drilling machine, solves the drill boom underaction that prior art exists, moves and limit by roadway floor condition, the defects such as automaticity is low, inefficiency.Comprise body, rock drilling device, walking mechanism and hydraulic power unit, its technical essential is: adopt rectangular axis slew gear vertically to adjust the rock drilling device control arm that hydraulic cylinder, lifting hydraulic cylinder and transverse direction adjust hydraulic cylinder and be connected rock drilling device with being provided with, and by the driven road wheel of body upper and the driving wheel walking rail moving along top, tunnel, the hydraulic power unit utilizing driven road wheel to be suspended on walking track is connected to After-Body.It is reasonable in design, compact conformation, take lane space little, easy and simple to handle, mobile stable, safe and reliable, can carry out setting the operation of the permanent support such as anchor pole, anchor cable according to different geological conditions and cross-section shape of roadway, and blast hole drilling operation can be realized at gun diging face, significantly improve production efficiency and the supporting quality of driving face.
Description
Technical field
The utility model relate to a kind of for anchor dress in tunnel, tunnelling engineering, visit water, the rock drilling visiting gas and broken rock, bore operation equipment, particularly a kind ofly adopt suspention from the outstanding rail rock drilling machine of the mode of dividing a word with a hyphen at the end of a line away and tunneling process coordinating operation.Be mainly used in the industries such as engineering, colliery, metal mine and chemical industry, railway, water power.Belong to stone drifting machinery, jumbolter technical field.
Background technology
At present, the engineering tunnel of Suporting structure, the rock drilling of mine working, bore operation can not used, traditional mode uses manually pneumatic or hydraulic drill rig to carry out rock drilling operation, this mode needs operating personnel's hand-held drill to carry out operation in deathtrap, and will carrying drilling equipment repeatedly, the labour intensity of workman is large, and safety factor is low, affects the efficiency of work.
Jumbolter is the boring bar tool in digging laneway bolt support work, its improving supporting effect, reduce support cost, accelerate into lane speed, reduce assistant conveyance amount, reduce labor intensity, improve drift section utilization rate etc. in have very outstanding superiority; Jumbolter is the key equipment of bolt support, and it affects the quality of bolt support---the accuracy in the orientation of bolthole, the degree of depth, aperture and rockbolt installation quality, relate to again the personal safety of operator, labour intensity and operating condition etc.
According to patent document report, for the deficiency existed in tunnelling permanent support operation process, the existing mechanization anchor boring device replacing traditional work mode.As " mine jumbo " that notification number is CN102678046B, disclose a kind of structure being similar to split type drill carriage.Its drill arm mechanism is arranged on one end of crawler type walking mechanism, and pumping plant to be led with the guide rail that walking mechanism is arranged by the carriage that arranges bottom it and coordinates.The slide of carriage offers the dovetail groove of joining with guide rail card, the both sides of drill arm mechanism are provided with the supporting leg supporting slide.This drill carriage is by being with the slide of dovetail groove and driving oil cylinder to control carriage, and pumping plant is moved relative to drill arm mechanism, and pumping plant can not interfere with the work of drilling mechanism.This kind of carriage does not easily block in operation process, affects the movement of whole device, and the bracing or strutting arrangement arranged in use, needs installing repeatedly, reduces operating efficiency.Publication No. is " Multifunctional hydraulic anchor rod drill carriage " of CN103174382A, the technical scheme recorded is: shovel board portion is arranged on the front end of base, operating desk assembly is arranged on the rear end of base, running part is arranged on the bottom of base, the top of base is provided with the movable mechanism that jumbolter is moved integrally, movable mechanism is provided with the rotating mechanism up and down that jumbolter is rotated up and down, upper and lower rotating mechanism is provided with the left-right swinging mechanism that jumbolter is swung.During due to operation, upper and lower rotating mechanism drives extension sleeve, and hoist cylinder and whole jumbolter together rotate, thus its to there is action heavier, slowly mobile, location underaction, and the problem such as power consumption is larger.Notification number is " the Split mine deep hole drill car " of CN201786257U, employing be that rig working host is become split-type structural with Design of Pump Station, and main frame and pumping plant are provided with creeper undercarriage all separately.But owing to adopting crawler travel mode, so when roadway floor condition is poor, moves and be restricted.Publication No. is " a kind of hydraulic pressure driving drill carriage " of CN103603672A, disclosed in be modular structure drill carriage.It adopts crawler type walking mechanism, power module is positioned at rear, chassis, and provide whole device required drive by electric system, the defect that this drill carriage exists is more close with the drill carriage of above-mentioned employing crawler type walking mechanism, and the electrical apparatus control system at rear portion exists certain potential safety hazard under special service condition.Notification number is " mine driller power-head drilling-angle adjusting mechanism " of CN100357564C, in disclosed structure, swing flat raft before and after column and vertical columns to arrange, swing column and vertical columns upper end are placed through respectively and swing in column guide pin bushing and vertical columns guide pin bushing, swing column lower end and rotating disk hinged, vertical columns lower end is fixedly connected with rotating disk, oil cylinder is placed in and swings between column and vertical columns, the cylinder body of two pieces oil cylinder is fixedly connected with the arranged on left and right sides of working cross beam respectively, its piston rod and rotating disk hinged.Because the lifting of this kind of arrangement works crossbeam is adjusted by the flexible of oil cylinder, the anglec of rotation is realized by rotating disk and rotating disk locator, thus the swing of working cross beam and range limited, the rotation of drill power head is not very convenient, boring positioning precision low.
In developed country, bore operation completes the transition of punching to comprehensive mechanization of punching by hand all already; In China, although jumbolter is also developing rapidly, jumbolter miscellaneous, roofboltier emerge in large numbers one after another, but there is drill boom underaction in existing jumbolter, move and limit by roadway floor condition, the defects such as automaticity is low, inefficiency, therefore rock drilling device is further studied, improve drilling quality, precision and efficiency significant.
Utility model content
The purpose of this utility model is to provide a kind of outstanding rail rock drilling machine, solve the drill boom underaction that prior art exists, move and limit by roadway floor condition, automaticity is low, the defects such as inefficiency, it is reasonable in design, compact conformation, take lane space little, easy and simple to handle, mobile stable, safe and reliable, while guaranteeing working space required in tunnel, can carry out setting anchor pole according to different geological conditions and cross-section shape of roadway, the permanent support operations such as anchor cable, and blast hole drilling operation can be realized at gun diging face, significantly improve production efficiency and the supporting quality of driving face.
The technical scheme that the utility model adopts is: this outstanding rail rock drilling machine comprises body, rock drilling device, walking mechanism and hydraulic power unit, its technical essential is: described body is assembled on walking track by the driving wheel of walking mechanism and driven road wheel, walking track utilizes hanging securing member to be suspended on top, tunnel, body under the drive of driving wheel and driven road wheel along walking rail moving, rock drilling device to be hinged on before the telescopic arm of rock drilling device control arm on Connection Block by rectangular axis slew gear and vertical adjustment hydraulic cylinder, the jointed shaft of flexible drive rectangular axis slew gear around telescopic arm front end of vertical adjustment hydraulic cylinder rotates, the rear Connection Block of control arm telescopic by connector and front part of a body hinged, connector be hinged with respectively rock drilling device control arm lifting hydraulic cylinder and laterally adjust hydraulic cylinder, the flexible rock drilling device control arm that drives of rock drilling device control arm lifting hydraulic cylinder rotates around connector jointed shaft, the lifting of adjustment rock drilling device, laterally adjustment hydraulic cylinder extension drives rock drilling device control arm to rotate around connector jointed shaft, the translation of adjustment rock drilling device, the hydraulic power unit utilizing driven road wheel to be suspended on walking track is connected to After-Body.
Described body both sides are provided with the supplemental support beam be made up of bracing frame, expansion link, brace summer telescopic hydraulic cylinder and brace summer telescopic.
The front portion of described body is also provided with holder, and is hinged with operating desk by operating desk control arm, operating desk control arm lifting hydraulic cylinder, operating desk balance hydraulic cylinder and Connection Block.
The advantage that the utility model has and good effect are: vertically adjust hydraulic cylinder because the utility model adopts rectangular axis slew gear and is provided with, rock drilling device control arm lifting hydraulic cylinder is connected rock drilling device with the rock drilling device control arm laterally adjusting hydraulic cylinder, and by the driven road wheel of body upper and the driving wheel walking rail moving along top, tunnel, be connected to the hydraulic power unit of After-Body, driven road wheel is utilized to be suspended on walking track, so it is reasonable in design, compact conformation, take lane space little, easy and simple to handle, mobile stable, safe and reliable, while guaranteeing working space required in tunnel, rock drilling device can the rotation of omnibearing stereo, can according to different geological conditions and cross-section shape of roadway, in the rock drilling of work plane optional position, compensate location preparation, carry out setting the operation of the permanent support such as anchor pole, anchor cable, and blast hole drilling operation can be realized at gun diging face.Because of body walking and rock drilling work independently of one another, without the need to frequent mobile rock drilling machine, therefore power unification, energy consumption is low, and safety is high, and labour intensity is low; Especially operating personnel is when this rock drilling machine of use carries out setting bolt and cable anchor supporting or blast hole drilling operation, significantly can shorten the activity duration, significantly improve production efficiency and the supporting operation quality of driving face.Therefore, the utility model fundamentally can solve the drill boom underaction that prior art exists, and moves and limits by roadway floor condition, the defects such as automaticity is low, inefficiency.
Accompanying drawing explanation
Fig. 1 is a kind of I type structural representation of the present utility model;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the sectional view of Fig. 1 along A-A line;
Fig. 4 is a kind of structural representation of the rock drilling device control arm in Fig. 1;
Fig. 5 is a kind of structural representation of the supplemental support beam in Fig. 1;
Fig. 6 is a kind of structural representation of the rock drilling device in Fig. 1;
Fig. 7 is a kind of structural representation of the rectangular axis slew gear in Fig. 1;
Fig. 8 is a kind of II type structural representation of the present utility model;
Fig. 9 is the top view of Fig. 8.
In figure, sequence number illustrates: 1 rock drilling device, 2 rectangular axis slew gears, 3 vertically adjust hydraulic cylinder, 4 rock drilling device control arms, 5 rock drilling device control arm lifting hydraulic cylinders, 6 connectors, 7 laterally adjust hydraulic cylinder, 8 driven road wheels, 9 bodies, 10 driving wheels, 11 supplemental support beams, 12 hydraulic power units, 13 walking tracks, 14 hanging securing members, 15 screech owl plates, 16 telescopic arms, 17 control arm telescopic hydraulic cylinders, 18 control arm telescopics, 19 bracing frames, 20 expansion links, 21 brace summer telescopics, 22 brace summer telescopic hydraulic cylinders, 23 handrail seats, 24 compensating hydraulic cylinders, 25 Hydraulic Cylinders, 26 drilling machine bases, adpting flange on 27, 28 rock drilling machines, 29 times adpting flanges, 30 rotary fluid motors, 31 supporting seats, 32 connect otic placode, 33 operating desk control arm lifting hydraulic cylinders, 34 operating desk control arms, 35 operating desk balance hydraulic cylinders, 36 Connection Blocks, 37 operating desks.
Detailed description of the invention
Concrete structure of the present utility model is described in detail according to Fig. 1 ~ 9.This outstanding rail rock drilling machine can make I type (as Suo Shi Fig. 1 ~ 2) structure or II type (as Suo Shi Fig. 8 ~ 9) structure according to actual operation requirements.It comprises body 9, rock drilling device 1, the parts such as walking mechanism and hydraulic power unit 12.For I type structure, wherein body 9 is assembled on walking track 13 by the driving wheel 10 of walking mechanism and driven road wheel 8, supports and the driven road wheel 8 of walking along walking track 13 and driving wheel 10 utilize support to be fixed on body 9.For ease of the brake in operating process and location, driving wheel 10 is provided with check mechanism (attached not shown).Walking track 13 utilizes hanging securing member 14 to be suspended on top, tunnel, walking track 13 can according to body 9 need adopt single track or double track.Body 9 moves along walking track 13 under the drive of driving wheel 10 and driven road wheel 8.Rock drilling device 1 is made up of Common parts such as handrail seat 23, compensating hydraulic cylinder 24, Hydraulic Cylinder 25, drilling machine base 26, rock drilling machine 28 and upper adpting flanges 27.Rectangular axis slew gear 2 by lower adpting flange 29, axis be vertically arranged two rotary fluid motors 30, with Angle connection plate supporting seat 31 and connect the part such as otic placode 32 and form.Rock drilling device control arm 4 is by screech owl plate 15, telescopic arm 16 with front Connection Block, control arm telescopic hydraulic cylinder 17, form with the part such as control arm telescopic 18 of rear Connection Block.
Together with upper adpting flange 27 bottom rock drilling device 1 is interconnected and fixed with the lower adpting flange 29 of rectangular axis slew gear 2, rock drilling device 1 to be hinged on before the telescopic arm 16 of rock drilling device control arm 4 on Connection Block by rectangular axis slew gear 2 and vertical adjustment hydraulic cylinder 3.The rotary fluid motor 30 of the vertical layout in rectangular axis slew gear 2 can make rock drilling device 1 pivot to any angle at horizontal plane, the rotary fluid motor 30 of lateral arrangement can make rock drilling device 1 pivot to any angle at vertical plane, move to make rock drilling device 1, job position is adjusted targetedly, accurately locates.The two ends of vertical adjustment hydraulic cylinder 3 are hinged with the connection otic placode 32 of rectangular axis slew gear 2 and the screech owl plate 15 of rock drilling device control arm 4 respectively, the jointed shaft of flexible drive rectangular axis slew gear 2 around telescopic arm 16 front end of vertical adjustment hydraulic cylinder 3 rotates, and makes rock drilling device 1 be elevated to the job position of needs.The rear Connection Block of the control arm telescopic 18 of rock drilling device control arm 4 is anterior hinged by connector 6 and body 9, connector 6 is hinged with respectively rock drilling device control arm lifting hydraulic cylinder 5 and horizontal adjustment hydraulic cylinder 7.The flexible rock drilling device control arm 4 that drives of rock drilling device control arm lifting hydraulic cylinder 5 rotates around the jointed shaft of connector 6, and the job position of adjustment rock drilling device 1 is in vertical lifting.The flexible rock drilling device control arm 4 that drives of horizontal adjustment hydraulic cylinder 7 rotates around connector 6 jointed shaft, adjusts the translation of job position in transverse direction of rock drilling device 1.
In order to ensure the stability of whole outstanding rail rock drilling machine in operation process, arrange supplemental support beam 11 in the both sides of body 9, braced structures is formed on the supplemental support beam 11 and the top, tunnel that are made up of bracing frame 19, expansion link 20, brace summer telescopic hydraulic cylinder 22 and brace summer telescopic 21.
Be responsible for rock drilling device 1, each movable part and driving wheel 10 provide the hydraulic power unit 12 of power, utilize driven road wheel 8 to be suspended on walking track 13, and make hydraulic power unit 12 be connected to the rear portion of body 9.
In II type structure as shown in Fig. 8 ~ 9, the rock drilling device 1 be hinged on by rectangular axis slew gear 2 and vertical adjustment hydraulic cylinder 3 on rock drilling device control arm 4 in an I type structure is respectively set respectively in the both sides of body 9 front portion.Also be provided with holder in the front portion of body 9, and be hinged with operating desk 37 by parts such as operating desk control arm 34, operating desk control arm lifting hydraulic cylinder 33, operating desk balance hydraulic cylinder 35 and Connection Blocks 36.Operating desk 37 is connected with operating desk control arm 34 front end by Connection Block 36, the holder of operating desk control arm 34 rear end and body 9 front portion is hinged, operating desk balance hydraulic cylinder 35 two ends are hinged with Connection Block 36 and operating desk control arm 34 respectively, and operating desk control arm lifting hydraulic cylinder 33 two ends are hinged with the holder of operating desk control arm 34 and body 9 front portion respectively.
For II type structure, during this outstanding rail rock drilling machine work, commitment positions according to said structure connected mode after top, tunnel mounting arrangements well, acquiescence original state is stretched out for vertically adjusting hydraulic cylinder 3, rock drilling device control arm lifting hydraulic cylinder 5, horizontal adjustment hydraulic cylinder 7 and operating desk balance hydraulic cylinder 35, and operating desk control arm lifting hydraulic cylinder 33 is regained; Rock drilling device control arm 4, operating desk control arm 34 and supplemental support beam 11 are all in retracted state; By vertically adjusting the adjustment of the flexible of hydraulic cylinder 3 and rectangular axis slew gear 2, driving rock drilling device 1 to move, making it be horizontal arrangement along tunnel bearing of trend.According to environment for use condition and the application requirement of reality, also can multiple rock drilling device 1 be connected with rock drilling device control arm 4 by rectangular axis slew gear 2 be set in body 9 front portion.
Driving wheel 10 drives driven road wheel 8, drives body 9 and hydraulic power unit 12 to move along walking track 13, shuts down, stretch out supplemental support beam 11, form braced structures with top, tunnel after arriving the position of pending bolt and cable anchor supporting or blast hole drilling operation; Stretch out or regain laterally adjustment hydraulic cylinder 7 and rock drilling device control arm lifting hydraulic cylinder 5, the position of rock drilling device 1 rock drilling operation is tentatively adjusted; After preliminary adjustment, for ensureing the operation quality of follow-up bolt and cable anchor supporting or blast hole drilling operation, the flexible of hydraulic cylinder 3 is adjusted with vertical by rock drilling device control arm 4, and the rotation adjustment of rectangular axis slew gear 2, rock drilling device 1 is driven to move, be elevated and rotate, accurate adjustment is targetedly carried out to job position, accurately behind location, starts rock drilling device 1 and carry out the rock drilling such as bolt and cable anchor supporting or blast hole drilling operation.
In positioning action and rock drilling operation process, operating personnel can carry out straighforward operation in operating desk 37.When needing to change the position of operating desk 37, by stretch out or recovery operation platform control arm lifting hydraulic cylinder 33 and operating desk control arm 34 adjust; And in the lifting process of operating desk 37, the length that adjustment operating desk balance hydraulic cylinder 35 is flexible, keeps the level of operating desk 37.
After the rock drilling operation need carrying out bolt and cable anchor supporting or blast hole drilling region completes, driving wheel 10 drives driven road wheel 8, drive body 9 along walking track 13 back to safety zone, then carry out operations such as tunneling or blow out, further excavation operation is implemented to tunnel; After newly excavating laneway molding, prepare to carry out next round bolt and cable anchor supporting or blast hole drilling rock drilling operation.
Repeat to move with upper machine body, the preliminary adjustment of rock drilling job position, the steps such as accurate adjustment, the rock drilling such as bolt and cable anchor supporting or blast hole drilling operation carried out to the region, tunnel of non-supporting or region, tunnel to be blown out, the supporting effectively improving tunnel with become lane quality.
Claims (3)
1. an outstanding rail rock drilling machine, comprise body, rock drilling device, walking mechanism and hydraulic power unit, it is characterized in that: described body is assembled on walking track by the driving wheel of walking mechanism and driven road wheel, walking track utilizes hanging securing member to be suspended on top, tunnel, body under the drive of driving wheel and driven road wheel along walking rail moving, rock drilling device to be hinged on before the telescopic arm of rock drilling device control arm on Connection Block by rectangular axis slew gear and vertical adjustment hydraulic cylinder, the jointed shaft of flexible drive rectangular axis slew gear around telescopic arm front end of vertical adjustment hydraulic cylinder rotates, the rear Connection Block of control arm telescopic by connector and front part of a body hinged, connector be hinged with respectively rock drilling device control arm lifting hydraulic cylinder and laterally adjust hydraulic cylinder, the flexible rock drilling device control arm that drives of rock drilling device control arm lifting hydraulic cylinder rotates around connector jointed shaft, the lifting of adjustment rock drilling device, laterally adjustment hydraulic cylinder extension drives rock drilling device control arm to rotate around connector jointed shaft, the translation of adjustment rock drilling device, the hydraulic power unit utilizing driven road wheel to be suspended on walking track is connected to After-Body.
2. outstanding rail rock drilling machine according to claim 1, is characterized in that: described body both sides are provided with the supplemental support beam be made up of bracing frame, expansion link, brace summer telescopic hydraulic cylinder and brace summer telescopic.
3. outstanding rail rock drilling machine according to claim 1, is characterized in that: the front portion of described body is also provided with holder, and is hinged with operating desk by operating desk control arm, operating desk control arm lifting hydraulic cylinder, operating desk balance hydraulic cylinder and Connection Block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520124426.8U CN204609762U (en) | 2015-03-04 | 2015-03-04 | Outstanding rail rock drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520124426.8U CN204609762U (en) | 2015-03-04 | 2015-03-04 | Outstanding rail rock drilling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204609762U true CN204609762U (en) | 2015-09-02 |
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ID=53962333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520124426.8U Withdrawn - After Issue CN204609762U (en) | 2015-03-04 | 2015-03-04 | Outstanding rail rock drilling machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN204609762U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653104A (en) * | 2015-03-04 | 2015-05-27 | 辽宁天安科技有限公司 | Suspension rail type rock drilling machine |
| CN106914885A (en) * | 2017-04-20 | 2017-07-04 | 中铁西南科学研究院有限公司 | A kind of existing railway Tunnel Water Leakage renovates manipulator |
| CN107905729A (en) * | 2017-11-27 | 2018-04-13 | 铁万林 | A kind of four arms rock perforating device and the four arm rock puncheres equipped with the device |
| CN109707309A (en) * | 2019-01-16 | 2019-05-03 | 中国铁建重工集团有限公司 | A kind of four-arm rock drilling jumbo |
| GB2589441A (en) * | 2020-05-21 | 2021-06-02 | Univ Anhui Sci & Technology | Integrated equipment with support and anchor collaboration function |
| CN113738279A (en) * | 2021-08-30 | 2021-12-03 | 山东君德智能装备有限公司 | Drilling equipment suitable for underground end face of mine |
-
2015
- 2015-03-04 CN CN201520124426.8U patent/CN204609762U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653104A (en) * | 2015-03-04 | 2015-05-27 | 辽宁天安科技有限公司 | Suspension rail type rock drilling machine |
| CN106914885A (en) * | 2017-04-20 | 2017-07-04 | 中铁西南科学研究院有限公司 | A kind of existing railway Tunnel Water Leakage renovates manipulator |
| CN107905729A (en) * | 2017-11-27 | 2018-04-13 | 铁万林 | A kind of four arms rock perforating device and the four arm rock puncheres equipped with the device |
| CN107905729B (en) * | 2017-11-27 | 2023-10-03 | 铁万林 | Four-arm rock perforating device and four-arm rock perforating machine with same |
| CN109707309A (en) * | 2019-01-16 | 2019-05-03 | 中国铁建重工集团有限公司 | A kind of four-arm rock drilling jumbo |
| GB2589441A (en) * | 2020-05-21 | 2021-06-02 | Univ Anhui Sci & Technology | Integrated equipment with support and anchor collaboration function |
| CN113738279A (en) * | 2021-08-30 | 2021-12-03 | 山东君德智能装备有限公司 | Drilling equipment suitable for underground end face of mine |
| CN113738279B (en) * | 2021-08-30 | 2023-10-13 | 山东君德智能装备有限公司 | Drilling equipment suitable for mine underground end face |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150902 Effective date of abandoning: 20171130 |