CN116480275B - Drilling machine for tunnel construction - Google Patents
Drilling machine for tunnel construction Download PDFInfo
- Publication number
- CN116480275B CN116480275B CN202310362952.7A CN202310362952A CN116480275B CN 116480275 B CN116480275 B CN 116480275B CN 202310362952 A CN202310362952 A CN 202310362952A CN 116480275 B CN116480275 B CN 116480275B
- Authority
- CN
- China
- Prior art keywords
- drilling
- vibration suppression
- assembly
- driving
- fixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 137
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 230000001629 suppression Effects 0.000 claims abstract description 66
- 238000013016 damping Methods 0.000 claims abstract description 44
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 238000004080 punching Methods 0.000 abstract description 3
- 239000011435 rock Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000012876 topography Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterized by means for land transport with their own drive, e.g. skid mounting or wheel mounting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B12/00—Accessories for drilling tools
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/003—Supports for the drilling machine, e.g. derricks or masts adapted to be moved on their substructure, e.g. with skidding means; adapted to drill a plurality of wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/04—Supports for the drilling machine, e.g. derricks or masts specially adapted for directional drilling, e.g. slant hole rigs
- E21B15/045—Hydraulic, pneumatic or electric circuits for their positioning
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterized by means for land transport with their own drive, e.g. skid mounting or wheel mounting
- E21B7/024—Drilling rigs characterized by means for land transport with their own drive, e.g. skid mounting or wheel mounting having means for adapting to inclined terrain; having means for stabilizing the vehicle while drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses a drilling machine for tunnel construction, which comprises a multi-terrain fixed crawler traveling vehicle, a scissor fork type lifter and a vibration suppression type drilling mechanism, wherein the scissor fork type lifter is arranged on the multi-terrain fixed crawler traveling vehicle, and the vibration suppression type drilling mechanism is arranged above the scissor fork type lifter; the vibration suppression type drilling mechanism comprises a drilling base, a circumferential positioning type reciprocating movement assembly and a magnetic damping vibration suppression drilling device, wherein the circumferential positioning type reciprocating movement assembly is arranged on the drilling base, and the magnetic damping vibration suppression drilling device is arranged on the circumferential positioning type reciprocating movement assembly. The invention belongs to the technical field of tunnel punching, and particularly provides a drilling machine for tunnel construction, which can be adaptively adjusted and fixed according to terrains, can inhibit vibration transmission during drilling and can reduce vibration transmission rate.
Description
Technical Field
The invention belongs to the technical field of tunnel punching, and particularly relates to a drilling machine for tunnel construction.
Background
When the auxiliary facilities on the inner wall of the tunnel are installed on the inner wall of the tunnel, the installation holes are required to be drilled on the inner wall of the tunnel, the auxiliary facilities on the inner wall of the tunnel are various in types and large in quantity, and the installation holes on the inner wall of the tunnel are large in demand.
The drilling construction technology is a comparatively lagging manual operation mode in tunnel construction, and manual operation has a plurality of defects, and when the operation is drilled, vibration can be generated, the manual operation is required to be fixed by force, and the manual operation is not guaranteed due to inconsistent angles, pushing speeds and depths of the handheld electric hammers for each time, the punching quality is not guaranteed, the repeatability is poor, in addition, when the manual operation is used for drilling, offset is extremely easy to occur, the surface of the rock in the tunnel is uneven, stable fixation is difficult to realize, and accurate drilling is inconvenient.
In addition, in the prior art, although there is also a trolley or a robot for automatic drilling, vibration generated during drilling is transmitted to the trolley or the robot, so that the equipment stabilizing effect is poor.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the drilling machine for tunnel construction, which can be adaptively adjusted and fixed according to the terrain, can inhibit vibration transmission during drilling and can reduce the vibration transmission rate.
The technical scheme adopted by the invention is as follows: the invention provides a drilling machine for tunnel construction, which comprises a multi-terrain fixed crawler traveling vehicle, a scissor fork type lifter and a vibration suppression type drilling mechanism, wherein the scissor fork type lifter is arranged on the multi-terrain fixed crawler traveling vehicle, a rotating support is arranged on the upper wall of the scissor fork type lifter, the vibration suppression type drilling mechanism is rotatably arranged at the upper end of the rotating support, an adjusting electric hydraulic rod is arranged between the scissor fork type lifter and the vibration suppression type drilling mechanism, and the angle of the vibration suppression type drilling mechanism is driven to be adjusted by adjusting the expansion and contraction of the electric hydraulic rod, so that multi-angle drilling is facilitated.
The vibration suppression type drilling mechanism comprises a drilling base, a circumferential positioning type reciprocating movement assembly and a magnetic damping vibration suppression drilling device, the circumferential positioning type reciprocating movement assembly is arranged on the drilling base, the magnetic damping vibration suppression drilling device is arranged on the circumferential positioning type reciprocating movement assembly, the circumferential positioning type reciprocating movement assembly comprises a driving seat, a moving screw rod, a guide slide rod, a moving thread sleeve and a positioning ring seat, the driving seat and the positioning ring seat are fixedly connected with the two ends of the upper wall of the drilling base, the moving screw rod is rotationally arranged between the driving seat and the positioning ring seat, the moving screw rod is circumferentially distributed around the axis of the positioning ring seat in an array manner, the guide slide rod is arranged between the driving seat and the positioning ring seat, the guide slide rod is circumferentially distributed around the axis of the positioning ring seat in an array manner, the moving screw rod and the guide slide rod are arranged in parallel to each other, the moving thread sleeve is sleeved on the moving screw rod, the side wall of the magnetic damping vibration suppression drilling device is provided with a sliding sleeve, the sliding sleeve is slidably arranged on the guide slide rod, the magnetic damping vibration suppression drilling device is arranged in the center of the moving screw rod and the guide slide rod, the driving seat is fixedly connected with the moving thread sleeve, the driving motor is internally provided with a driving screw rod and is internally provided with a driving screw rod, and the moving screw rod is rotationally arranged along the moving screw rod, and the moving side wall is connected with the moving screw rod.
Further, the gear assembly comprises a central gear and driven planetary gears, the central gear is rotationally arranged in the driving cavity, the central gear and the positioning ring seat are coaxially arranged, the movable motor is fixedly connected on the side wall of the driving seat, the output shaft of the movable motor is coaxially fixedly connected with the central gear, the driven planetary gears are rotationally arranged in the driving cavity, the driven planetary gears are circumferentially distributed around the central gear, the central shaft parts of the driven planetary gears are respectively and coaxially fixedly connected with the central shaft parts of the movable screw rods, the movable motor drives the central gear to rotate, the central gear drives the plurality of groups of driven planetary gears to synchronously rotate, and the driven planetary gears drive the plurality of groups of movable screw rods to synchronously rotate, so that the magnetic damping vibration suppression drilling device is driven by the movable screw sleeve to stably move along the movable screw rods and the guide slide rods.
Wherein the magnetic damping vibration suppression drilling device comprises a drilling driving assembly, a drill bit and a magnetic damping vibration suppression assembly, the magnetic damping vibration suppression assembly is distributed around the circumferential array of the side wall of the drilling driving assembly, the drill bit is arranged in the drilling driving assembly, the drilling driving assembly comprises a driving shell and a drilling motor arranged in the driving shell, the drill bit is coaxially and fixedly connected with the output end of the drilling motor, the drilling motor drives the drill bit to rotate for drilling, the drill bit and a positioning ring seat are coaxially arranged, the circumferential array of the magnetic damping vibration suppression assembly is distributed on the side wall of the driving shell, the magnetic damping vibration suppression assembly is fixedly connected with a movable threaded sleeve and a sliding sleeve respectively, the magnetic damping vibration suppression assembly comprises a hydraulic damper, a fixed cylinder, a fixed magnet, an electromagnetic coil and a Hall sensor, the hydraulic damper is arranged outside the driving shell, the fixed cylinder is fixedly connected with the movable threaded sleeve and the sliding sleeve respectively, the end part of the hydraulic damper is slidably arranged in the fixed cylinder, the fixed magnet is fixedly connected on the side wall of the driving shell, a magnetic control cavity is arranged on one side of the fixed cylinder away from the driving shell, an electromagnetic coil is arranged in the magnetic control cavity, a Hall sensor is arranged in the magnetic control cavity, the electromagnetic coil, the fixed cylinder, the hydraulic damper and the fixed magnet are coaxially arranged, a controller is arranged in the driving shell, the controller is electrically connected with the electromagnetic coil and the Hall sensor respectively, vibration generated by the hydraulic damper during drilling is damped and restrained, meanwhile, the Hall sensor detects magnetic field change in real time and feeds back to the controller, the controller adjusts current according to the detection result of the Hall sensor, thereby changing the suction force of the electromagnetic coil on the fixed magnet, the driving shell is always positioned at the center of the magnetic damping vibration suppression assemblies, so that the stability of the driving shell is ensured, and the drill bit is stably aligned with the axis of the positioning ring seat.
The Hall sensor adopts a linear Hall element HW-101A, is small in package, convenient to install, saves space, is high in temperature resistance and high in sensitivity, and the controller adopts an STC89C51 singlechip.
More specifically, the bottom wall of the drilling base and the upper wall of the scissor fork type lifter are respectively provided with a connecting pin seat, two ends of the adjusting electric hydraulic rod are respectively provided with pin heads, and the pin heads are respectively connected with the connecting pin seats in a rotating way through pin shafts.
The positioning ring seat is far away from the end face array of the movable screw rod and is provided with a sliding oil cavity with one side open, a piston is slidably arranged in the sliding oil cavity, a positioning pin is fixedly connected to the side wall of the piston, an oil supply cavity is formed in one end of the sliding oil cavity, which is close to the movable screw rod, a hydraulic sensor is arranged in the oil supply cavity, an oil supply end is arranged on the scissor lift, the oil supply end comprises an oil tank and an oil pump group, an oil pump group and the oil tank are communicated with the oil supply cavity through an oil supply pipeline and an oil return pipeline, electromagnetic valves are respectively arranged on the oil supply pipeline and the oil return pipeline, the on-off of the pipelines is controlled, and the controller is electrically connected with the hydraulic sensor, the electromagnetic valves and the oil supply end.
Wherein, the scissor lift is the prior art, and is not described herein.
Further, the fixed track car of advancing of many topography includes the car body and rotates the supplementary fixed track subassembly of locating on the car body, the symmetry rotates on the car body and is equipped with the track wheel, the track wheel outside is around being equipped with the track body, be equipped with the motor of advancing on the car body, the output shaft of the motor of advancing links to each other with the track wheel, and the motor of advancing drives the track wheel and rotates to drive the track and rotate, supplementary fixed track subassembly rotates and locates car body four corners, be connected between supplementary fixed track subassembly and the car body and be equipped with fixed electric hydraulic stem, drive supplementary fixed track subassembly rotation angle regulation through fixed electric hydraulic stem is flexible, thereby adapt to different topography and carry out fixed support.
More specifically, supplementary fixed track subassembly includes auxiliary pulley, fixed bolster, driven pulley and driven track, auxiliary pulley coaxial rigid coupling locates the track wheel lateral wall, and fixed bolster one end links to each other with auxiliary pulley shaft portion rotation, driven pulley rotates to locate on the fixed bolster other end lateral wall, and driven track is around locating auxiliary pulley and driven pulley outside, the one end of fixed electronic hydraulic stem links to each other with car body lateral wall rotation, and the other end of fixed electronic hydraulic stem links to each other with the fixed bolster lateral wall rotation, drives the fixed bolster around auxiliary pulley shaft portion rotation through the flexible of fixed electronic hydraulic stem to drive driven pulley and rotate downwards and ground in close contact, through the driven pulley in car body four corners respectively with ground contact, thereby guarantee the steady of car body, the stability of car body when consolidating the drilling, adapt to different topography.
Further, the upper wall of the vehicle body is provided with an illuminating lamp, so that the vehicle is convenient to provide light for the operation environment.
The beneficial effects obtained by the invention by adopting the structure are as follows: according to the drilling machine for tunnel construction, firstly, the multi-terrain fixed crawler traveling vehicles are arranged, the inclination angles of the auxiliary fixed crawler assemblies are respectively adjusted through the fixed electric hydraulic rods, so that the driven pulleys are driven to rotate downwards to be in close contact with the ground, the driven pulleys at four corners of the vehicle body are respectively in contact with the ground, the stability of the vehicle body is guaranteed, and the stability of the vehicle body is adapted to different terrains when the drilling is reinforced; secondly, aiming at the defect that the drilling operation is easy to vibrate, the magnetic damping vibration suppression drilling device is arranged, the stability of drilling is ensured, meanwhile, vibration generated by drilling can be effectively suppressed, the vibration transmission rate is reduced, vibration generated by drilling is damped and suppressed by the hydraulic damper, meanwhile, the magnetic field change is detected by the Hall sensor in real time, and then fed back to the controller, the current is adjusted by the controller according to the detection result of the Hall sensor, so that the attraction force of the electromagnetic coil to the fixed magnet is changed, the driving shell is always positioned at the center of the magnetic damping vibration suppression assemblies, the stability of the driving shell is ensured, and the drill bit is stably aligned with the axis of the positioning ring seat; finally, through the locating nail of a plurality of slip settings of hydraulic pressure cooperation, laminating rock wall fixes a position, and stability is high, is difficult for producing the skew.
Drawings
Fig. 1 is a schematic structural view of a drilling machine for tunnel construction provided by the invention;
fig. 2 is a schematic structural view of a drilling machine for tunnel construction according to another view angle of the present invention;
FIG. 3 is a side view of a drilling machine for tunnel construction according to the present invention;
FIG. 4 is a schematic view of a vibration suppressing drilling mechanism according to the present invention;
FIG. 5 is a schematic view of a vibration suppressing drilling mechanism according to another embodiment of the present invention;
FIG. 6 is a view showing the use of the vibration suppressing drilling mechanism according to the present invention;
FIG. 7 is a schematic diagram of a combined structure of a magnetically damped vibration suppression assembly and a borehole drive assembly according to the present invention;
FIG. 8 is a schematic view of the internal structure of a magnetically damped vibration suppression assembly according to the present invention;
FIG. 9 is a cross-sectional view of a drill bit and borehole drive assembly provided by the present invention;
FIG. 10 is a cross-sectional view of a drive chamber provided by the present invention;
fig. 11 is a cross-sectional view of a positioning ring seat provided by the invention.
Wherein, 1, a multi-terrain fixed crawler traveling vehicle, 2, a scissor type lifter, 3, a vibration suppression type drilling mechanism, 4, a rotary support, 5, an adjusting electric hydraulic rod, 6, a drilling base, 7, a circumferential positioning type reciprocating movement assembly, 8, a magnetic damping vibration suppression drilling device, 9, a driving seat, 10, a moving screw, 11, a guiding sliding rod, 12, a moving thread sleeve, 13, a positioning ring seat, 14, a sliding sleeve, 15, a driving cavity, 16, a moving motor, 17, a gear assembly, 18, a central gear, 19, a driven planetary gear, 20, a drilling driving assembly, 21, a drill bit, 22, a magnetic damping vibration suppression assembly, 23, a driving shell, 24, a drilling motor, 25, hydraulic damper, 26, fixed cylinder, 27, fixed magnet, 28, solenoid, 29, hall sensor, 30, magnetic control chamber, 31, controller, 32, connecting pin holder, 33, pin head, 34, pin shaft, 35, sliding oil chamber, 36, piston, 37, dowel, 38, oil supply chamber, 39, hydraulic sensor, 40, oil supply end, 41, oil tank, 42, oil pump group, 43, solenoid valve, 44, vehicle body, 45, auxiliary fixed track assembly, 46, track wheel, 47, track body, 48, travelling motor, 49, fixed electric hydraulic rod, 50, auxiliary wheel, 51, fixed bracket, 52, driven wheel, 53, driven track, 54, and illuminating lamp.
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate orientation or positional relationships based on those shown in the drawings, merely to facilitate description of the invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
As shown in fig. 1-3, the drilling machine for tunnel construction provided by the invention comprises a multi-terrain fixed crawler traveling vehicle 1, a scissor fork type lifter 2 and a vibration suppression type drilling mechanism 3, wherein the scissor fork type lifter 2 is arranged on the multi-terrain fixed crawler traveling vehicle 1, a rotating support 4 is arranged on the upper wall of the scissor fork type lifter 2, the vibration suppression type drilling mechanism 3 is rotatably arranged at the upper end of the rotating support 4, an adjusting electric hydraulic rod 5 is arranged between the scissor fork type lifter 2 and the vibration suppression type drilling mechanism 3, and the angle of the vibration suppression type drilling mechanism 3 is driven to be adjusted by adjusting the expansion and contraction of the electric hydraulic rod 5, so that multi-angle drilling is facilitated.
Referring to fig. 1-3, the multi-terrain stationary crawler traveling vehicle 1 includes a vehicle body 44 and an auxiliary stationary crawler assembly 45 rotatably disposed on the vehicle body 44, wherein crawler wheels 46 are symmetrically rotatably disposed on the vehicle body 44, crawler bodies 47 are wound around the outer sides of the crawler wheels 46, traveling motors 48 are disposed on the vehicle body 44, an output shaft of each traveling motor 48 is connected with each crawler wheel 46, each traveling motor 48 drives each crawler wheel 46 to rotate, so as to drive a crawler to rotate, the auxiliary stationary crawler assembly 45 is rotatably disposed at four corners of the vehicle body 44, a stationary electric hydraulic rod 49 is connected between the auxiliary stationary crawler assembly 45 and the vehicle body 44, and the auxiliary stationary crawler assembly 45 is driven to rotate by telescoping of the stationary electric hydraulic rod 49 to adjust angles, so as to adapt to stationary support of different terrains; the upper wall of the vehicle body 44 is provided with an illumination lamp 54, which is convenient for providing light for the working environment.
As shown in fig. 2 and 3, the auxiliary fixed track assembly 45 includes an auxiliary belt pulley 50, a fixed support 51, a driven belt pulley 52 and a driven track 53, the auxiliary belt pulley 50 is coaxially and fixedly connected to the side wall of the track pulley 46, one end of the fixed support 51 is rotatably connected to the shaft portion of the auxiliary belt pulley 50, the driven belt pulley 52 is rotatably arranged on the side wall of the other end of the fixed support 51, the driven track 53 is wound around the outer sides of the auxiliary belt pulley 50 and the driven belt pulley 52, one end of the fixed electric hydraulic rod 49 is rotatably connected to the side wall of the vehicle body 44, the other end of the fixed electric hydraulic rod 49 is rotatably connected to the side wall of the fixed support 51, the fixed support 51 is driven to rotate around the shaft portion of the auxiliary belt pulley 50 by the expansion and contraction of the fixed electric hydraulic rod 49, so as to drive the driven belt pulley 52 to rotate downwards to be in tight contact with the ground, the driven belt pulleys 52 at four corners of the vehicle body 44 are respectively contacted with the ground, so as to ensure the stability of the vehicle body 44 during drilling, and adapt to different terrains.
As shown in fig. 4-6, the vibration suppression type drilling mechanism 3 comprises a drilling base 6, a circumferential positioning type reciprocating assembly 7 and a magnetic damping vibration suppression drilling device 8, wherein the circumferential positioning type reciprocating assembly 7 is arranged on the drilling base 6, the magnetic damping vibration suppression drilling device 8 is arranged on the circumferential positioning type reciprocating assembly 7, the circumferential positioning type reciprocating assembly 7 comprises a driving seat 9, a moving screw rod 10, a guide sliding rod 11, a moving threaded sleeve 12 and a positioning ring seat 13, the driving seat 9 and the positioning ring seat 13 are fixedly arranged at two ends of the upper wall of the drilling base 6, the moving screw rod 10 is rotatably arranged between the driving seat 9 and the positioning ring seat 13, the moving screw rod 10 is circumferentially distributed around the axis of the positioning ring seat 13, the guide sliding rod 11 is arranged between the driving seat 9 and the positioning ring seat 13, the guide slide bars 11 are distributed around the circumferential array of the axis of the positioning ring seat 13, the movable screw rod 10 and the guide slide bars 11 are arranged in parallel, the movable screw sleeve 12 is sleeved on the movable screw rod 10, the movable screw sleeve 12 is in threaded connection with the movable screw rod 10, the side wall of the magnetic damping vibration suppression drilling device 8 is provided with a sliding sleeve 14, the sliding sleeve 14 is slidably arranged on the guide slide bars 11, the magnetic damping vibration suppression drilling device 8 is arranged at the central parts of a plurality of groups of the movable screw rods 10 and the guide slide bars 11, the magnetic damping vibration suppression drilling device 8 is fixedly connected with the movable screw sleeve 12, a driving cavity 15 is arranged in the driving seat 9, a gear assembly 17 is arranged in the driving cavity 15, the side wall of the driving seat 9 is provided with a movable motor 16, the gear assembly 17 is connected with the movable screw rod 10, the movable motor 16 drives the movable screw rod 10 to rotate through the gear assembly 17, the moving screw 10 rotates to drive the magnetic damping vibration suppression drilling device 8 to slide along the moving screw 10 and the guide sliding rod 11 through the moving threaded sleeve 12, so that drilling is advanced; the bottom wall of the drilling base 6 and the upper wall of the scissor fork type lifter 2 are respectively provided with a connecting pin seat 32, two ends of the adjusting electric hydraulic rod 5 are respectively provided with pin heads 33, and the pin heads 33 are respectively connected with the connecting pin seats 32 in a rotating way through pin shafts 34.
Referring to fig. 10, the gear assembly 17 includes a sun gear 18 and a driven planetary gear 19, the sun gear 18 is rotationally disposed in the driving cavity 15, the sun gear 18 is coaxially disposed with the positioning ring seat 13, the moving motor 16 is fixedly disposed on a side wall of the driving seat 9, an output shaft of the moving motor 16 is coaxially fixedly connected with the sun gear 18, the driven planetary gear 19 is rotationally disposed in the driving cavity 15, the driven planetary gear 19 is circumferentially distributed around the sun gear 18, a central shaft portion of the driven planetary gear 19 is coaxially fixedly connected with a central shaft portion of the moving screw 10, the moving motor 16 drives the sun gear 18 to rotate, the sun gear 18 drives multiple groups of driven planetary gears 19 to synchronously rotate, and the driven planetary gear 19 drives multiple groups of moving screws 10 to synchronously rotate, so that the magnetic damping vibration suppression drilling device 8 is driven to stably move along the moving screw 10 and the guide slide rod 11 through the moving threaded sleeve 12.
Referring to fig. 7-9, the magnetic damping vibration suppression drilling device 8 comprises a drilling driving assembly 20, a drill bit 21 and a magnetic damping vibration suppression assembly 22, the magnetic damping vibration suppression assembly 22 is distributed around the circumferential array of the side wall of the drilling driving assembly 20, the drill bit 21 is installed on the drilling driving assembly 20, the drilling driving assembly 20 comprises a driving shell 23 and a drilling motor 24 arranged in the driving shell 23, the drill bit 21 is fixedly connected with the output end of the drilling motor 24 coaxially, the drilling motor 24 drives the drill bit 21 to rotate for drilling, the drill bit 21 and the positioning ring seat 13 are coaxially arranged, the circumferential array of the magnetic damping vibration suppression assembly 22 is distributed on the side wall of the driving shell 23, the magnetic damping vibration suppression assembly 22 is fixedly connected with the movable threaded sleeve 12 and the sliding sleeve 14 respectively, the magnetic damping vibration suppression assembly 22 comprises a hydraulic damper 25, a fixed cylinder 26, a fixed magnet 27, an electromagnetic coil 28 and a hall sensor 29, the hydraulic damper 25 is arranged outside the driving shell, the fixed cylinder 26 is fixedly connected with the movable threaded sleeve 12 and the sliding sleeve 14 respectively, the end part of the hydraulic damper 25 is slidably arranged in the fixed cylinder 26, the fixed magnet 27 is fixedly connected on the side wall of the driving shell 23, a magnetic control cavity 30 is arranged on one side of the fixed cylinder 26 far away from the driving shell 23, the electromagnetic coil 28 is arranged in the magnetic control cavity 30, the Hall sensor 29 is arranged in the magnetic control cavity 30, the electromagnetic coil 28, the fixed cylinder 26, the hydraulic damper 25 and the fixed magnet 27 are coaxially arranged, a controller 31 is arranged in the driving shell 23, the controller 31 is electrically connected with the electromagnetic coil 28 and the Hall sensor 29 respectively to damp and inhibit vibration generated during drilling, and meanwhile, the Hall sensor 29 detects magnetic field change in real time, and then feeds back to the controller 31, the controller 31 adjusts the current according to the detection result of the Hall sensor 29, so that the attraction force of the electromagnetic coil 28 to the fixed magnet 27 is changed, the driving shell 23 is always positioned at the center of the magnetic damping vibration suppression assemblies 22, the stability of the driving shell 23 is ensured, and the drill bit 21 is aligned with the axis of the positioning ring seat 13 stably.
The Hall sensor 29 adopts a linear Hall element HW-101A, has small package, is convenient to install and save space, has high temperature resistance and high sensitivity, and the controller 31 adopts an STC89C51 singlechip.
As shown in fig. 5, fig. 6 and fig. 11, the end surface array of the positioning ring seat 13 far away from the moving screw 10 is provided with a sliding oil cavity 35 with an opening at one side, a piston 36 is arranged in the sliding oil cavity 35 in a sliding way, a positioning nail 37 is fixedly connected to the side wall of the piston 36, one end of the sliding oil cavity 35 close to the moving screw 10 is communicated with an oil supply cavity 38, a hydraulic sensor 39 is arranged in the oil supply cavity 38, an oil supply end 40 is arranged on the scissor lift 2, the oil supply end 40 comprises an oil tank 41 and an oil pump group 42, the oil pump group 42 and the oil tank 41 are communicated with the oil supply cavity 38 through an oil supply pipeline and an oil return pipeline, electromagnetic valves 43 are respectively arranged on the oil supply pipeline and the oil return pipeline, the on-off of the pipelines is controlled, and the controller 31 is electrically connected with the hydraulic sensor 39, the electromagnetic valves 43 and the oil supply end 40.
The scissor lift 2 is a mature technology, and will not be described herein.
When the device is specifically used, the travelling motor 48 is controlled to control the vehicle body 44 to move to a tunnel operation position, then a plurality of groups of fixed electric hydraulic rods 49 are controlled to stretch and retract for different lengths according to the terrain, so that the fixed support 51 is driven to rotate around the shaft parts of the auxiliary pulleys 50 for different angles, the driven pulleys 52 at four corners of the vehicle body 44 are in close contact with the ground, at the moment, the four corners of the vehicle body 44 are firmly fixed on the ground and adapt to the concave ground in the tunnel, the inclination of the vehicle body 44 caused by the uneven ground is avoided, and the friction force between the vehicle body 44 and the ground is increased due to the driven caterpillar 53, so that the stability of the vehicle body 44 is enhanced when drilling is avoided, the vehicle body 44 shakes when drilling is avoided, then the height of the scissor type lifter 2 is regulated according to the drilling height, the scissor type lifter 2 drives the vibration-inhibiting type drilling mechanism 3 to regulate the height after the height regulation is finished, the electric hydraulic rod 5 is started to be regulated, the electric hydraulic rod 5 is regulated to stretch and retract to drive the vibration suppression type drilling mechanism 3 to rotate to regulate the angle, multi-angle drilling is facilitated, after regulation is completed, the oil supply end 40 is started to supply oil into the oil supply cavity 38, the oil pushes the piston 36 to drive the positioning nails 37 to extend out of the sliding oil cavity 35 so as to tightly prop against the rock face, when all the positioning nails 37 are tightly propped against the rock face, at the moment, the pressure detected by the hydraulic sensor 39 exceeds a threshold value along with the continuous operation of the oil supply end 40 and sends a signal to the controller 31, the controller 31 controls the electromagnetic valve 43 to close and controls the oil pump group 42 to stop working, at the moment, the positioning ring seat 13 is self-adaptively attached and fixed with the rock face, offset is not easy to generate, the force is uniform, the mobile motor 16 and the drilling motor 24 are started, the mobile motor 16 drives the central gear 18 to rotate, the central gear 18 drives the multiple groups of driven planetary gears 19 to synchronously rotate, the driven planetary gear 19 drives the multiple groups of movable screws 10 to synchronously rotate, thereby driving the magnetic damping vibration suppression drilling device 8 to stably move along the movable screws 10 and the guide sliding rods 11 through moving the threaded sleeve 12, the drilling motor 24 drives the drill bit 21 to rotate to drill, the drill bit 21 is pushed forward while rotating, vibration generated during drilling is transmitted to the hydraulic damper 25 through the driving shell 23, the hydraulic damper 25 dampens and suppresses the vibration generated during drilling, meanwhile, the Hall sensor 29 detects magnetic field changes in real time and feeds back to the controller 31, the controller 31 adjusts the current according to the detection result of the Hall sensor 29, thereby changing the attraction force of the electromagnetic coil 28 to the fixed magnet 27, overcoming the offset of the driving shell 23 caused by drilling vibration, enabling the driving shell 23 to be always positioned at the center of the multiple magnetic damping vibration suppression components 22, ensuring the stability of the driving shell 23, enabling the drill bit 21 to be stably aligned with the axis of the positioning ring seat 13, and controlling the movable motor 16 to reversely rotate after drilling is finished.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The invention and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the invention as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present invention.
Claims (7)
1. The utility model provides a drilling machine for tunnel construction which characterized in that: the device comprises a multi-terrain fixed crawler traveling vehicle, a scissor fork type lifter and a vibration suppression type drilling mechanism, wherein the scissor fork type lifter is arranged on the multi-terrain fixed crawler traveling vehicle, and the vibration suppression type drilling mechanism is arranged above the scissor fork type lifter; the vibration suppression type drilling mechanism comprises a drilling base, a circumferential positioning type reciprocating movement assembly and a magnetic damping vibration suppression drilling device, wherein the circumferential positioning type reciprocating movement assembly is arranged on the drilling base, and the magnetic damping vibration suppression drilling device is arranged on the circumferential positioning type reciprocating movement assembly; the magnetic damping vibration suppression drilling device comprises a drilling driving assembly, a drill bit and a magnetic damping vibration suppression assembly, wherein the magnetic damping vibration suppression assembly is arranged on the circumferential positioning type reciprocating movement assembly, the magnetic damping vibration suppression assembly is distributed around the circumferential array of the side wall of the drilling driving assembly, and the drill bit is arranged on the drilling driving assembly;
the magnetic damping vibration suppression assembly is distributed on the side wall of the drilling driving assembly in a circumferential array manner, the magnetic damping vibration suppression assembly is respectively provided with a movable threaded sleeve and a sliding sleeve, the magnetic damping vibration suppression assembly comprises a hydraulic damper, a fixed cylinder, a fixed magnet, an electromagnetic coil and a Hall sensor, the hydraulic damper is arranged on the outer side of the drilling driving assembly, the fixed cylinder is fixedly connected with the movable threaded sleeve and the sliding sleeve respectively, the end part of the hydraulic damper is slidably arranged in the fixed cylinder, the fixed magnet is fixedly connected on the side wall of the drilling driving assembly, one side of the fixed cylinder, which is far away from the drilling driving assembly, is provided with a magnetic control cavity, the electromagnetic coil is arranged in the magnetic control cavity, the Hall sensor is arranged in the magnetic control cavity, the electromagnetic coil, the fixed cylinder, the hydraulic damper and the fixed magnet are coaxially arranged, and a controller is arranged in the drilling driving assembly and is electrically connected with the electromagnetic coil and the Hall sensor respectively;
the circumference positioning type reciprocating movement assembly comprises a driving seat, a moving screw rod, a guide sliding rod and a positioning ring seat, wherein the driving seat and the positioning ring seat are fixedly connected to two ends of the upper wall of the drilling base, the moving screw rod is rotationally arranged between the driving seat and the positioning ring seat, the moving screw rod is circumferentially distributed around the axis of the positioning ring seat, the guide sliding rod is arranged between the driving seat and the positioning ring seat, the guide sliding rod is circumferentially distributed around the axis of the positioning ring seat, the moving screw rod and the guide sliding rod are arranged in parallel, a moving threaded sleeve is sleeved on the moving screw rod, the moving threaded sleeve is in threaded connection with the moving screw rod, the sliding sleeve is slidingly arranged on the guide sliding rod, a magnetic damping vibration suppression drilling device is arranged at the central parts of a plurality of groups of moving screw rods and the guide sliding rod, a driving cavity is arranged in the driving seat, a gear assembly is arranged in the side wall of the driving seat, the gear assembly is connected with the moving screw rod, and the moving motor drives the moving screw rod to rotate through the gear assembly;
the locating ring seat is far away from the terminal surface array distribution of moving screw and is equipped with one side open-ended slip oil pocket, slip oil pocket is interior to slide and is equipped with the piston, piston lateral wall rigid coupling is equipped with the locating pin, the one end intercommunication that the slip oil pocket is close to moving screw is equipped with the oil feed chamber, is equipped with hydraulic sensor in the oil feed chamber, is equipped with the oil feed end on the scissor lift, and the oil feed end includes oil tank and oil pump group, and the intercommunication is equipped with oil supply pipeline, returns oil line between oil pump group and oil tank and the oil feed chamber, is equipped with the solenoid valve on oil supply pipeline and the oil return pipeline respectively, controller and hydraulic sensor, solenoid valve, oil feed end electric connection.
2. A drilling machine for tunnel construction according to claim 1, wherein: the multi-terrain fixed track traveling vehicle comprises a vehicle body and auxiliary fixed track assemblies which are rotationally arranged on the vehicle body, wherein crawler wheels are symmetrically rotationally arranged on the vehicle body, the crawler wheels are externally wound with crawler bodies, traveling motors are arranged on the vehicle body, output shafts of the traveling motors are connected with the crawler wheels, the auxiliary fixed track assemblies are rotationally arranged at four corners of the vehicle body, and fixed electric hydraulic rods are connected between the auxiliary fixed track assemblies and the vehicle body.
3. A drilling machine for tunnel construction according to claim 2, characterized in that: the auxiliary fixed track assembly comprises an auxiliary belt wheel, a fixed support, a driven belt wheel and a driven belt wheel, wherein the auxiliary belt wheel is coaxially fixedly connected with the side wall of the crawler wheel, one end of the fixed support is rotatably connected with the shaft part of the auxiliary belt wheel, the driven belt wheel is rotatably arranged on the side wall of the other end of the fixed support, the driven belt wheel is wound on the outer side of the auxiliary belt wheel and the driven belt wheel, one end of the fixed electric hydraulic rod is rotatably connected with the side wall of the vehicle body, and the other end of the fixed electric hydraulic rod is rotatably connected with the side wall of the fixed support.
4. A tunnel boring machine according to claim 3, wherein: the upper wall of the scissor fork type lifter is provided with a rotating support, the vibration suppression type drilling mechanism is rotationally arranged at the upper end of the rotating support, and an adjusting electric hydraulic rod is arranged between the scissor fork type lifter and the vibration suppression type drilling mechanism.
5. The drilling machine for tunnel construction according to claim 4, wherein: the gear assembly comprises a central gear and driven planetary gears, the central gear is rotationally arranged in the driving cavity, the central gear and the positioning ring seat are coaxially arranged, the movable motor is fixedly connected to the side wall of the driving seat, the output shaft of the movable motor is coaxially fixedly connected with the central gear, the driven planetary gears are rotationally arranged in the driving cavity, the driven planetary gears are distributed around the circumferential array of the central gear, and the central shaft parts of the driven planetary gears are respectively coaxially fixedly connected with the central shaft parts of the movable screw rods.
6. The drilling machine for tunnel construction according to claim 5, wherein: the drilling driving assembly comprises a driving shell and a drilling motor arranged in the driving shell, the drill bit is fixedly connected with the output end of the drilling motor in a coaxial mode, and the drill bit and the positioning ring seat are coaxially arranged.
7. The drilling machine for tunnel construction according to claim 6, wherein: the Hall sensor adopts a linear Hall element HW-101A, and an illuminating lamp is arranged on the upper wall of the vehicle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310362952.7A CN116480275B (en) | 2023-04-07 | 2023-04-07 | Drilling machine for tunnel construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310362952.7A CN116480275B (en) | 2023-04-07 | 2023-04-07 | Drilling machine for tunnel construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116480275A CN116480275A (en) | 2023-07-25 |
| CN116480275B true CN116480275B (en) | 2024-01-12 |
Family
ID=87220560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310362952.7A Active CN116480275B (en) | 2023-04-07 | 2023-04-07 | Drilling machine for tunnel construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116480275B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060003475A (en) * | 2004-07-06 | 2006-01-11 | 한국서부발전 주식회사 | Boring machine work deck of side wall in tunnel |
| CN103874825A (en) * | 2011-09-08 | 2014-06-18 | Aps技术公司 | System and method for damping vibration in a drill string using a magnetorheological damper |
| CN106639873A (en) * | 2016-06-07 | 2017-05-10 | 陶德明 | Multifunctional shear-fork supporting platform drilling machine |
| CN108049809A (en) * | 2017-12-11 | 2018-05-18 | 山东大学 | A kind of crawler-type lifting platform hydraulic drilling machine and its method of work |
| CN214836099U (en) * | 2021-06-07 | 2021-11-23 | 山东省煤田地质局第四勘探队 | Three-layer tunnel drilling and emergency rescue drilling machine |
| CN114320153A (en) * | 2021-12-30 | 2022-04-12 | 徐州倍思特自动化工程有限公司 | Engineering construction is with preventing stifled brill car of digging from laminating location based on electrorheological fluid |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804764B (en) * | 2016-03-14 | 2017-12-19 | 中国矿业大学 | One kind bores the formula development machine that rises |
-
2023
- 2023-04-07 CN CN202310362952.7A patent/CN116480275B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060003475A (en) * | 2004-07-06 | 2006-01-11 | 한국서부발전 주식회사 | Boring machine work deck of side wall in tunnel |
| CN103874825A (en) * | 2011-09-08 | 2014-06-18 | Aps技术公司 | System and method for damping vibration in a drill string using a magnetorheological damper |
| CN106639873A (en) * | 2016-06-07 | 2017-05-10 | 陶德明 | Multifunctional shear-fork supporting platform drilling machine |
| CN108049809A (en) * | 2017-12-11 | 2018-05-18 | 山东大学 | A kind of crawler-type lifting platform hydraulic drilling machine and its method of work |
| CN214836099U (en) * | 2021-06-07 | 2021-11-23 | 山东省煤田地质局第四勘探队 | Three-layer tunnel drilling and emergency rescue drilling machine |
| CN114320153A (en) * | 2021-12-30 | 2022-04-12 | 徐州倍思特自动化工程有限公司 | Engineering construction is with preventing stifled brill car of digging from laminating location based on electrorheological fluid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116480275A (en) | 2023-07-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106976131B (en) | A kind of plate drilling device for the drill bit that can automatically switch | |
| AU2012394996B2 (en) | Well runner | |
| CN209774426U (en) | Inner supporting structure of large-diameter steel pipe | |
| CN107097301B (en) | A kind of plate drilling device of automatic switchover drill bit | |
| CN116480275B (en) | Drilling machine for tunnel construction | |
| CN113550691B (en) | Robot for drilling subway tunnel segment and construction method | |
| CN107630455A (en) | A kind of free of contamination equipment for building | |
| CN206230509U (en) | The crawler belt angle adaptive mechanism of pipe robot | |
| CN103362437B (en) | Portal frame type core drilling machine | |
| CN111425151B (en) | Hydraulic propelling equipment for well drilling for geological exploration | |
| CN107900409B (en) | Single-bit gas-electricity integrated drilling device | |
| CN105171932A (en) | Full-automatic glass drilling machine applied to production and processing of glass | |
| CN109732360A (en) | Copper pipe pulls out holes mechanism | |
| CN204262888U (en) | The built-in nitrogen balance device of vertical machining centre | |
| CN210707710U (en) | Automatic compensation device for combined positioning of suspension assembly | |
| CN114412352A (en) | Stable drilling machine for spiral earth anchor | |
| CN110644922B (en) | Quick drilling and piling equipment for protection construction of expansive soil road section | |
| CN105033306B (en) | Automatic feeding type drilling machine | |
| CN208617033U (en) | A kind of horizontal tape supply device of continuous ribbon supply | |
| CN208033707U (en) | A kind of movable type radial drilling machine | |
| CN201493485U (en) | Power head spindle mechanism of rotor processing system | |
| CN111157276A (en) | Sampling system | |
| CN115070863B (en) | PE pipe processing method | |
| CN217401529U (en) | Preload adjustment device for shock absorber spring | |
| CN209935572U (en) | Adjustable welding cold-drawing steel pipe straightening device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |