CN100538006C - Hard rock mole - Google Patents
Hard rock mole Download PDFInfo
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- CN100538006C CN100538006C CNB2007100124095A CN200710012409A CN100538006C CN 100538006 C CN100538006 C CN 100538006C CN B2007100124095 A CNB2007100124095 A CN B2007100124095A CN 200710012409 A CN200710012409 A CN 200710012409A CN 100538006 C CN100538006 C CN 100538006C
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- cutterhead
- rock mole
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Abstract
Hard rock mole relates to the coal mine roadway road heading machinery, solves the problem that existing development machine is not suitable for the total rock tunnelling.The invention provides a kind of hard rock mole, have cutting units, shovel board portion, first transporter, body, running part, hydraulic system, electrical system, dust pelletizing system and dust suppression system, it is characterized in that: the cutterhead of cutting units adopts the big inertia cutterhead of minor diameter, diameter range is 1.0-1.1m, and the dynamic moment of inertia scope is 230-210kgm
2Be equipped with to surpass on the pick toothholder of cutting units and deeply feel the wear-resisting pick tooth of hard denticle, pick tooth surface hardness reaches 62HRC, degree of depth 2-3mm.The present invention is mainly used in the total rock tunnelling.
Description
Technical field
The present invention relates to the coal mine roadway road heading machinery, be specially a kind of hard rock mole, can realize the excavation operation of big section half rock gangway road or high rigidity (f8) total rock.
Background technology
At present, big section (20M
2More than) driving of half rock gangway road and total rock adopts big gun pick operation, is an arduous and dangerous job, adopts big gun pick work production efficient lower, operator's labour intensity is big, after the big gun pick operation strata structure intensity around the tunnel has been caused certain destruction.And existing heading equipment mainly is to be applicable to medium-hard coal petrography and alternate heading, is not suitable for the operation of total rock tunnel; The internal spraying system that adopts is extremely short application life, damages back repair and replacement difficulty; The driving face dust can not get effective control simultaneously, and the serious harm operator's is healthy.Therefore, be starved of that a kind of cutting power is big, cut efficient height, working stability and the hard rock mole of good dust pelletizing system is arranged, to improve the operating efficiency of excavation operation, reduce operator's labour intensity, improve labourer's working environment, help operator's physical and mental health.
Chinese patent application (application number 03253082.X, publication number CN2677614Y) a kind of medium-coal-rock roadheader is disclosed, include driving cylinder, fuselage and support arm, this support arm includes telescopic boom and rotation support arm, this driving cylinder is installed on the telescopic boom, this telescopic boom is plugged in the rotation support arm, and this rotation support arm and fuselage are connected and fixed, and these rotation support arm both sides are equiped with the back chipping cylinder; This fuselage end face is equiped with at least one securing device, be equiped with fixedly shoes on this securing device end face, this fuselage side is equiped with at least one walking mobile device, and this walking mobile device includes a fixed end and a movable end, and this fixed end is connected and fixed on fuselage.This securing device is air pressure or hydraulic means.This fuselage left and right sides sidewall can add at least one slide rail, is equiped with corresponding sliding sleeve on this slide rail, and this sliding sleeve links with the movable end of corresponding walking mobile device.And the portability of this structure is not strong, and walking mechanism is more loaded down with trivial details, and power taking is had relatively high expectations to the tunnel in ground and tunnel during walking, and can cause certain destruction to the tunnel, is unfavorable for the support work in step down.Good dust pelletizing system is not provided, and a large amount of dust are harmful to operator's physical and mental health.
Summary of the invention
The object of the present invention is to provide a kind of heavy hard rock mole, solve existing development machine and be not suitable for big section (20M
2More than) half rock gangway road and high rigidity (f8) total rock driving, machine vibration is big during the cut hard rock, dust is many, problems such as machine lateral sliding, this development machine can increase substantially the headwork efficient in total rock tunnel, greatly reduce operator's working strength, improve operator's working environment, improve reliability.
Technical scheme of the present invention is:
Hard rock mole provided by the invention has cutting units, shovel board portion, first transporter, body, running part, back supporting, second transporter, hydraulic system, electrical system, lubricating system, dust pelletizing system and inside and outside spraying firing dust system.The development machine complete machine is from great, and cut power is big, and complete machine stability is good, is equipped with powerful dust pelletizing system and inside and outside spraying firing dust system at random, is applicable to the excavation operation in big section high rigidity total rock and half rock gangway road.
The present invention adopts powerful cutting technique, it comprises the cooperation of large single tooth cutting force and big propulsive force, the clipping force of pick tooth by cutting motor drive the cut reductor again transmission provide to cutterhead, average monodentate clipping force can reach 8500N during cut, the propulsive force of cutterhead is provided by cut hoist cylinder, cut angling cylinder and travel driving unit, and can be cutterhead provides propulsive force to reach 150kN; Cutting units adopts the big inertia cutterhead of minor diameter, and the diameter of the taper cutting head scope is 1.0-1.1m, and the dynamic moment of inertia scope is 230-210kg.m
2, the non-heated type welding stress of pick toothholder is removed, and surpasses and deeply feels the wear-resisting pick tooth of hard denticle, and pick tooth surface hardness reaches 62HRC, degree of depth 2-3mm.
Running part of the present invention adopts the backplate full-closed structure, is furnished with powerful travel driving unit.The drive unit of running part of the present invention is made of walking hydraulic motor, drive sprocket, driving speed reducer, walking hydraulic motor and driving speed reducer are linked together, two flange on the driving speed reducer, one is linked together with walker, and one is linked together with drive sprocket.The running part drive unit provides big driving force, can reach 490kN.
Cutterhead of the present invention and cutting arm coupled position are positioned at the cutterhead rear portion.
Body rear side of the present invention is installed the back supporting, is equipped with the horizontal side bracing or strutting arrangement in the supporting of back, and the side bracing or strutting arrangement is in supporting both sides, back, and the side bracing or strutting arrangement is driven by hydraulic cylinder, can stretch out and regains complete machine stability when helping improving work to the development machine both sides.
Cutting units of the present invention is provided with cut reductor and cutting motor casing, and cutting motor is loaded in the cut casing, and cut reductor one end connects with cutting motor, and the other end connects with cutterhead, and highly reliable external internal spraying system is housed at the cutterhead rear portion; Anterior and cutting motor casing front end both sides are equipped with the mist toe-in and are closed the external spraying system at the cut reductor, spray outside the cut reductor front portion and spray outward for annular high and low pressure, spray outside the motor case body front end both sides and spray outward for piece shape.Described external spraying system comprises the outer sprinkling seat of annular, low-pressure nozzle, high pressure nozzle, piece shape sprinkling seat, side nozzle outward, the cutting arm of outer sprinkling seat of annular and cutting units is linked together, low-pressure nozzle and high pressure nozzle are contained on the outer sprinkling seat of annular, the cutting motor casing of outer sprinkling seat of piece shape and cutting units is linked together, and side nozzle is contained on the outer sprinkling seat of piece shape.
Development machine of the present invention is equipped with the long short odd test high-efficiency dust removal system of pressing at random, dust control device is suspended on the fore side of equipment, utilize the ventilation system in tunnel, make wind pass through to form air curtain behind the dust control device, by deduster (air duct is installed on the development machine) on the elevating conveyor that is installed in development machine dust is drawn onto deduster again.
The present invention adopts damping technology, it comprises cut acceleration recognition device and the high low speed automatic transfer equipment of cut, electrical system has vibrating sensor, current sensor and core controller etc., on the cut reductor vibrating sensor is installed, the vibration situation in the time of can be to the development machine operation detects; Current sensor in the electrical system can detect the consumed power of tunneling machine cutting motor, and each sensor is sent detected signal into core controller respectively.Core controller is according to the detected value of cut acceleration and the detected value of current sensor, by core controller data are handled, when hardness number surpasses pre-set value, cutting motor has the High-Speed Automatic low speed that is transformed into, thereby control the speed of cutting motor automatically according to the hardness of institute's cut material, realize the high low speed conversion of cut.
Adopt the peak damping technology that disappears in the hydraulic system of the present invention, on lifting in hydraulic system and the revolution banked direction control valves secondary overflow valve is housed, the secondary overflow valve can realize that vibration damping cuts the effect of ripple.
The present invention adopts the fastener locking technology, between the panoramic table of cutting motor and motor case body, cut reductor and motor case body, cutting arm and cut reductor, cutterhead and cutting arm, running part and body, back supporting and body, development machine and floating bearing and body connect to adopt to execute finished jail (spiralock is called for short SPL) checknut connection.
The invention has the beneficial effects as follows:
1, the present invention is the new architecture of cantilever development machine; this development machine overall construction intensity height; machine is great, and cut power is big, and the driving power of each actuating mechanism is big; the excavation operation that is suitable for big section high rigidity total rock and half rock gangway road; expand the scope of application of development machine, improved the operating efficiency of the driving in total rock and half rock gangway road, greatly reduced operator's working strength; improve operator's working environment, protected operator's physical and mental health.
2, the running part of hard rock mole of the present invention adopts the backplate full-closed structure, has reduced fault rate; The powerful travel driving unit that is equipped with has strengthened the walking driving force, for cut provides powerful propulsive force.
3, be equipped with the side bracing or strutting arrangement in the back supporting at hard rock mole of the present invention rear portion, lateral sliding and vibration problem when the side bracing or strutting arrangement has solved development machine work have improved the stability of development machine, equipment job stability height.
4. a large amount of dust that hard rock mole of the present invention is produced when being equipped with powerful dust pelletizing system and spraying system to reduce excavation operation have greatly effectively improved operator's working environment, have protected operator's physical and mental health.
5. vibration damping and fastener locking technology that hard rock mole of the present invention adopts make development machine work more reliable, have reduced the machine maintenance time, have improved operating efficiency.
6, the big inertia cutterhead of development machine assembling minor diameter of the present invention adopts high strength pick tooth to cooperate reliably hydraulic system efficiently, has improved the monodentate cutting force greatly, thereby has made it possess the ability of cut high rigidity (f8) total rock and half rock gangway.
Description of drawings
Fig. 1 is a hard rock mole structure chart of the present invention.
Fig. 2 is a hard rock mole side-looking structure chart of the present invention.
Fig. 3 is a hard rock mole dust pelletizing system structure chart of the present invention.
Fig. 4 is a hard rock mole cutterhead structure chart of the present invention.
Fig. 5 a-b is hard rock mole running part driving device structure figure of the present invention, and Fig. 5 a is a front view; Fig. 5 b is the vertical view of Fig. 5 a.
Fig. 6 is a hard rock mole external spraying system construction drawing of the present invention.
Fig. 7 is a hard rock mole electrical system schematic diagram of the present invention.
Fig. 8 is a hard rock mole hydraulic system principle figure of the present invention.
Fig. 9 indicates flow chart at a high speed for low speed of the present invention returns.
Figure 10 is a low speed pretrigger flow chart of the present invention.
Figure 11 changes the low speed flow chart at a high speed for the present invention.
Figure 12 changes the low rate start flow chart at a high speed for the present invention.
Figure 13 is a cut high-speed starting flow chart of the present invention.
Figure 14 is a cut high speed pretrigger flow chart of the present invention.
Among the figure, 1 cutting units; 2 shovel board portions; 3 first transporters; 4 bodies; 5 running parts; 6 back supportings; 7 hydraulic systems; 8 electrical systems; 9 side bracing or strutting arrangements; 10 backplates; 11 walkers; 12 creeper treads; 13 drive units; 14 thrust wheels; 15 cutting arms; 16 external internal spraying systems; 17 cutterheads; 18 cutting motor casings; 19 external spraying systems; 20 cut reductors; 21 dedusting air ducts; 22 dust arresters; 23 dust control devices; 24 pick toothholders; 25 pick teeth; 26 the body of the cutting head; 27 hydraulic motors; 28 drive sprockets; 29 driving speed reducers; The outer sprinkling seat of 30 annulars; 31 low-pressure nozzles; 32 high pressure nozzles; 33 outer sprinkling seats of shape; 34 side nozzles; 35 panoramic tables; Secondary overflow valve on the 36 revolution banked direction control valves; Secondary overflow valve on the 37 lifting banked direction control valves; The SZ vibrating sensor; TA11, TA12, TA13 current sensor; The U1 core controller.
The specific embodiment
As depicted in figs. 1 and 2, the present invention is a hard rock mole, cutting units 1 is installed in the upper end before the body 4, downside is installed shovel board portion 2 before the body 4, first transporter 3 is installed in the middle of the body 4,4 liang of side lower parts of body are installed running part 5, running part 5 comprises backplate 10, walker 11, creeper tread 12, drive unit 13, thrust wheel 14 etc., running part 5 adopts and prevents that rock, coal from entering backplate 10 full-closed structures of creeper tread 12 inboards, and backplate 10 is installed in the both sides and drive unit 13 both sides of walker 11 bottom thrust wheels 14 respectively; The operating desk of hydraulic system 7 is installed on body 4 right sides, the fuel tank of hydraulic system 7 is installed in body 4 left sides, body 4 rear sides are installed back supporting 6, the both sides installation side bracing or strutting arrangement 9 of back supporting 6, the upper right quarter of back supporting 6 is installed the electric control box of electrical system 8, the upper left quarter of back supporting 6 is installed the pumping plant of hydraulic system 7, and external internal spraying system 16 is assemblied between cutterhead 17 and the cutting arm 15, and external spraying system 19 is installed in cut reductor 20 anterior and cutting motor casing 18 front end both sides.The cutterhead 17 and cutting arm 15 coupled position of cutting units are positioned at cutterhead 17 rear portions.
The present invention adopts powerful cutting technique, it comprises the cooperation of large single tooth cutting force and big propulsive force, the clipping force of pick tooth by cutting motor drive the cut reductor again transmission provide to cutterhead, average monodentate clipping force can reach 8500N during cut, the propulsive force of cutterhead is provided by cut hoist cylinder, cut angling cylinder and travel driving unit, and can be cutterhead provides propulsive force to reach 150kN; Cutting units adopts the big inertia cutterhead of minor diameter, and the diameter of the taper cutting head scope is 1.0-1.1m, and the dynamic moment of inertia scope is 230-210kg.m
2, the non-heated type welding stress of pick toothholder is removed, and surpasses and deeply feels the wear-resisting pick tooth of hard denticle, and pick tooth surface hardness reaches 62HRC, degree of depth 2-3mm.
As shown in Figure 3, be equipped with the long short odd test high-efficiency dust removal system of pressing at random, joining dust control device 23 and dust arrester 22 are positioned at the development machine rear portion; Dedusting air duct 21 is drawn from dust arrester 22, extends to the development machine front portion always.Dust control device is suspended on the fore side of equipment, utilizes the ventilation system in tunnel, makes wind pass through to form air curtain behind the dust control device, by deduster (air duct is installed on the development machine) on the elevating conveyor that is installed in development machine dust is drawn onto deduster again.
As shown in Figure 4, cutterhead 17 comprises pick toothholder 24, pick tooth 25, the body of the cutting head 26 etc., and pick toothholder 24 is welded on the body of the cutting head 26, and pick tooth 25 is assemblied on the pick toothholder 24.
Shown in Fig. 5 a-Fig. 5 b, walking hydraulic motor 27 is linked together with driving speed reducer 29, two flange on the driving speed reducer 29, and one is linked together with walker 11, and one is linked together with drive sprocket 28.
As shown in Figure 6, the outer sprinkling seat 30 of annular is linked together with cutting arm 15, and low-pressure nozzle 31 and high pressure nozzle 32 are contained on the outer sprinkling seat 30 of annular, and the outer sprinkling seat 33 of piece shape is linked together with cutting motor casing 18, and side nozzle 34 is contained on the outer sprinkling seat 33 of piece shape.Wherein, the water spray pressure of low-pressure nozzle 31 and side nozzle 34 is 2.5MPa, and the water spray pressure of high pressure nozzle 32 is 15MPa.
The course of work of the present invention is as follows:
(1) hard rock mole is advanced and is gone to correct position by electrical system 8, hydraulic system 7 control running parts 5.
(2) hard rock mole shovel board portion 2, back supporting 6 fall, and side bracing or strutting arrangement 9 stretches out, and it is ready for excavation operation to start dust arrester 22.
(3) cutterhead of the scraper chain of the star-wheel of hard rock mole shovel board portion 2, first transporter 3, cutting units 1 begins headwork.
As shown in Figure 7, electrical system has vibrating sensor SZ, current sensor TA11-TA13, and core controller U1 etc., and current sensor TA11-TA13 mainly detects the electric current of electric motor loop; Vibrating sensor SZ is mainly used in vibration and the cut acceleration when detecting body cut rock; The course of work: each sensor is sent detected signal into core controller U1 respectively, and core controller U1 is according to the detected value of the detected value of cut acceleration and current sensor, handled data by core controller.Development machine carries out cut when work, each phase current values of current sensor senses cutting motor, this moment the cutting motor high-speed cruising, when certain time detects each phase current values I
Detect=1.1*I
Specified(I
DetectFor detecting electric current, I
SpecifiedBe rated current), and vibrating sensor is when detecting vibration values and accekeration and reaching certain value, and the cut motor is automatically converted to low cruise.Thereby, control the speed of cutting motor automatically according to complete machine oscillation situation and electric current, can change the rotating speed of cutterhead automatically.Among Fig. 7, KM1-KM2 is an AC vacuum contactor; M1 is two voltage winding motors.In the present embodiment, during the cutting motor high-speed cruising, cutterhead speed of service 46r/min, current value is rated current (rated current is 118.6A), when electric current was 1.1 times of rated current, the cut motor was a low cruise by high-speed transitions automatically, and the cutterhead speed of service is 23r/min; Vice versa.In the present embodiment, the specifications and models of core controller are SPN17C; The present invention realizes above-mentioned automatic control by core controller, its software flow such as Fig. 9-shown in Figure 14, above-mentioned several flow performing is order in no particular order, they finish low speed separately respectively and return sign setting at a high speed, the low speed pretrigger is changeed low speed at a high speed, changes low rate start at a high speed, the cut high-speed starting, functions such as cut high speed pretrigger.
As shown in Figure 8, secondary overflow valve 36 on the revolution banked direction control valves in hydraulic system and the secondary overflow valve 37 on the lifting banked direction control valves can realize that vibration damping cuts the effect of ripple.
In addition, the present invention adopts the fastener locking technology, executes complete firm thread connection with the panoramic table 35 and the floating bearing of body 4, development machine with the employing that connects between the body 4 with body 4, back supporting 6 with cutting arm 15, running part 5 with cut reductor 20, cutterhead 17 with cutting motor casing 18, cutting arm 15 at cutting motor and cutting motor casing 18, the cut reductor 20 of cutting units.
Claims (10)
1, hard rock mole, have cutting units (1), shovel board portion (2), first transporter (3), body (4), running part (5), hydraulic system (7), electrical system (8), dust pelletizing system and dust suppression system, it is characterized in that: the cutterhead (17) of cutting units (1) adopts the big inertia cutterhead of minor diameter, diameter range is 1.0-1.1m, and the dynamic moment of inertia scope is 230-210kg.m
2Be equipped with to surpass on the pick toothholder (24) of cutting units (1) and deeply feel the wear-resisting pick tooth of hard denticle (25), pick tooth surface hardness reaches 62HRC, degree of depth 2-3mm.
2, according to the described hard rock mole of claim 1, it is characterized in that: cutting units (1) is provided with cut reductor (20) and cutting motor casing (18), at cutterhead (17) rear portion of cutting units (1) external internal spraying system (16) is housed; Anterior and cutting motor casing (18) front end both sides are equipped with the mist toe-in and are closed external spraying system (19) at cut reductor (20).
3, according to the described hard rock mole of claim 2, it is characterized in that: external spraying system (19) comprises annular outer sprinkling seat (30), low-pressure nozzle (31), high pressure nozzle (32), the outer sprinkling seat (33) of piece shape, side nozzle (34), the outer sprinkling seat of annular (30) is linked together with the cutting arm (15) of cutting units (1), low-pressure nozzle (31) and high pressure nozzle (32) are contained on the outer sprinkling seat of annular (30), the outer sprinkling seat (33) of piece shape is linked together with the cutting motor casing (18) of cutting units (1), and side nozzle (34) is contained on the outer sprinkling seat (33) of piece shape.
4, according to the described hard rock mole of claim 1, it is characterized in that: the cutterhead (17) of cutting units (1) is positioned at cutterhead (17) rear portion with cutting arm (15) coupled position.
5, according to the described hard rock mole of claim 1, it is characterized in that: body (4) rear side is installed back supporting (6), is equipped with horizontal side bracing or strutting arrangement (9) in the back supporting (6), and this side bracing or strutting arrangement (9) is controlled by hydraulic cylinder.
6, according to the described hard rock mole of claim 1, it is characterized in that: dust pelletizing system is the long weak point odd test dust pelletizing system of pressing, joining dust control device (23) and dust arrester (22) are positioned at the development machine rear portion, and dedusting air duct (21) extends to the development machine middle part from dust control device (23) always.
7, according to the described hard rock mole of claim 1, it is characterized in that: electrical system (8) has vibrating sensor, current sensor and core controller, and vibrating sensor, current sensor connect with core controller respectively.
8, according to the described hard rock mole of claim 1, it is characterized in that: on lifting in the hydraulic system and the revolution banked direction control valves secondary overflow valve is housed.
9, according to the described hard rock mole of claim 1, it is characterized in that: connect the connection of employing checknut between the motor of cutting units (1) and cutting motor casing (18), cut reductor (20) and cutting motor casing (18), cutting arm (15) and cut reductor (20), cutterhead (17) and cutting arm (15), running part (5) and body (4), back supporting (6) and body (4), development machine panoramic table (35) and floating bearing and the body (4).
10, according to the described hard rock mole of claim 1, it is characterized in that: running part adopts the backplate full-closed structure, is furnished with the travel driving unit that constitutes by walking hydraulic motor, drive sprocket (28), driving speed reducer (29), walking hydraulic motor and driving speed reducer (29) are linked together, two flange on the driving speed reducer, one is linked together with walker (11), and one is linked together with drive sprocket (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100124095A CN100538006C (en) | 2007-08-08 | 2007-08-08 | Hard rock mole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100124095A CN100538006C (en) | 2007-08-08 | 2007-08-08 | Hard rock mole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101289936A CN101289936A (en) | 2008-10-22 |
| CN100538006C true CN100538006C (en) | 2009-09-09 |
Family
ID=40034363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100124095A Expired - Fee Related CN100538006C (en) | 2007-08-08 | 2007-08-08 | Hard rock mole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100538006C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261250A (en) * | 2010-05-31 | 2011-11-30 | 三一重型装备有限公司 | Hydraulic crushing-type excavator for hard rock |
| CN101906968A (en) * | 2010-06-30 | 2010-12-08 | 三一重型装备有限公司 | Tunneling machine |
| CN101963059A (en) * | 2010-09-20 | 2011-02-02 | 沈阳矿山机械有限公司 | Cutting head of development machine and anti-interference device of shovel board |
| CN102296956B (en) * | 2011-08-07 | 2013-07-31 | 中国煤炭科工集团太原研究院 | High efficient dedusting system with air channel arranged in central part of heading machine |
| CN102635353B (en) * | 2012-04-06 | 2014-07-16 | 中铁工程装备集团有限公司 | Double-cantilever hard rock coal roadway heading and anchoring device |
| CN103291308B (en) * | 2013-05-29 | 2015-09-16 | 北京中铁瑞威基础工程有限公司 | For boom-type roadheader and the method for tunnel construction of constructing tunnel |
| CN103628873B (en) * | 2013-11-25 | 2015-08-19 | 江苏中机矿山设备有限公司 | A kind of twin-roll cutting units of coal-winning machine |
| CN107916931B (en) * | 2017-12-07 | 2023-12-15 | 徐州徐工基础工程机械有限公司 | Heading machine cutting head for hard rock working condition and heading machine |
| CN109653745A (en) * | 2018-11-29 | 2019-04-19 | 亢建华 | Development machine cable dragging device |
| CN109854238A (en) * | 2019-01-02 | 2019-06-07 | 中国矿业大学 | A kind of hard rock cutting mechanism based on Nutation Principle |
| CN111173063B (en) * | 2020-02-15 | 2022-02-11 | 陕西力明众创机电设备有限公司 | Internal spraying milling and digging machine device |
| CN114046153A (en) * | 2021-11-25 | 2022-02-15 | 徐州永佳液压设备有限公司 | Hydraulic tunneling device for quarrying and using method thereof |
-
2007
- 2007-08-08 CN CNB2007100124095A patent/CN100538006C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101289936A (en) | 2008-10-22 |
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