CN112647876A - Down-pressing type drilling process based on negative feedback temperature regulation - Google Patents
Down-pressing type drilling process based on negative feedback temperature regulation Download PDFInfo
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- CN112647876A CN112647876A CN202110063626.7A CN202110063626A CN112647876A CN 112647876 A CN112647876 A CN 112647876A CN 202110063626 A CN202110063626 A CN 202110063626A CN 112647876 A CN112647876 A CN 112647876A
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- cavity
- fixedly connected
- piston
- drill bit
- bevel gear
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- 238000005553 drilling Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000003825 pressing Methods 0.000 title claims abstract description 20
- 230000033228 biological regulation Effects 0.000 title claims abstract description 14
- 239000000428 dust Substances 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 7
- 239000000110 cooling liquid Substances 0.000 claims description 7
- 230000002146 bilateral effect Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract 1
- 230000009125 negative feedback regulation Effects 0.000 abstract 1
- 239000007921 spray Substances 0.000 description 6
- 239000012530 fluid Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000012809 cooling fluid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a downward-pressing type drilling process based on negative feedback temperature regulation, which comprises a machine body and two struts, wherein the left end and the right end of the bottom end of the machine body are symmetrically and fixedly connected, a first cavity is arranged in the machine body, the downward-pressing type drilling process based on negative feedback temperature regulation is simple in equipment structure and convenient to operate, automatic drilling on the ground is realized, all working procedures are mutually matched without influence, real-time temperature detection is carried out through a negative feedback regulation system, then a drill bit can be cooled continuously in the drilling process, drilled dust can be cleaned, the practical performance and the efficiency of the device are improved, the waste of manpower and material resources is effectively avoided, and the cost is greatly reduced.
Description
Technical Field
The invention relates to the related field of drilling equipment, in particular to a downward pressing type drilling process based on negative feedback temperature regulation.
Background
The drilling equipment has the advantages of high degree of mechanization, strong stratum adaptability, flexible and quick construction and the like, is the most common and effective technical measure adopted in the deep foundation pit enclosing structure of the upper and lower soil strata at present, the torque and the rotating speed of a drill rod are basic parameters for drilling the drilled pile, the drilling is carried out in the upper and lower soil strata with obvious difference of physical and mechanical characteristics along with the whole process of drilling filling, a drill bit enters the stratum from the soil layer, the torque and the rotating speed of the drill rod present obvious mutation characteristics, the temperature difference can be generated when the machine operates, so that the operation of the machine becomes unstable, larger errors are easily caused, and at present, the drilling equipment capable of realizing automatic drilling in the pressing process is lacked.
Disclosure of Invention
The invention aims to solve the technical problem of providing a downward-pressing type drilling process based on negative feedback temperature regulation, which can overcome the problems.
The technical scheme adopted by the invention for solving the technical problems is as follows: a down-pressing type drilling process based on negative feedback temperature regulation comprises a machine body and two struts which are symmetrically and fixedly connected to the left end and the right end of the bottom end of the machine body, wherein a first cavity is formed in the machine body, a third cavity with a downward opening is formed in the machine body, two second cavities are symmetrically and bilaterally formed in the two ends of the third cavity, a threaded gear is arranged in the first cavity, the right side of the threaded gear is meshed with a first gear, the first gear is fixedly connected to a first rotating shaft, the first rotating shaft is rotatably connected to the machine body, a second bevel gear is fixedly connected to the bottom of the first rotating shaft and meshed with a first bevel gear, the first bevel gear is fixedly connected to the left end of a first motor shaft, the first motor shaft is rotatably arranged in a first motor, and the first motor is fixedly arranged at the right end of the bottom of the machine body, the threaded gear is internally provided with internal threads, the threaded gear is connected with a threaded screw of a screw shell through the internal threads, the screw shell is arranged in the third cavity in a vertically sliding manner, a drill body is fixedly arranged in the screw shell, a cleaning fluid cavity is arranged in the drill body, cooling fluid is stored in the cleaning fluid cavity, a pressing plate is fixedly connected with the bottom of the screw shell and the drill body and can be arranged in the second cavity in a vertically sliding manner, two piston rods are fixedly connected with the bottom of the pressing plate in a bilateral symmetry manner, piston tubes are arranged in the piston rods and communicated with the first cavity, a drill slide seat is arranged at the bottom of the third cavity in a vertically sliding manner, a fifth cavity is arranged in the drill slide seat, and two piston cylinders in a bilateral symmetry manner are fixedly arranged at the bottom of the fifth cavity on the drill slide seat, a fourth cavity is arranged in the piston cylinder, a piston head is arranged in the fourth cavity in a vertically sliding manner, a piston device is arranged on the piston head, and the piston device is used for injecting cooling liquid in the first cavity into the fourth cavity; the drill bit device is arranged at the bottom of the pressing plate and used for triggering the drill bit to rotate to drill on the ground after being pressed down; the bottom of the machine body is arranged on the right side, the left end of the supporting column is fixedly connected with a fan seat, a cleaning device is arranged in the fan seat, and the cleaning device is used for blowing away and cleaning dust generated in the drilling process.
Further, the piston device comprises the piston head, the top of the piston head is fixedly connected to the bottom of the piston rod, a sixth cavity is arranged in the piston head, a ball valve is fixedly arranged at the top of the sixth cavity, the top of the ball valve is fixedly connected to the bottom of the piston tube, a ball chamber is fixedly arranged at the bottom of the piston head, a seventh cavity with an upward opening is arranged in the ball chamber, a valve ball body is arranged in the seventh cavity, two piston holes are symmetrically arranged at the bottom of the piston head in a bilateral mode, a cooling tube is fixedly arranged at the bottom of the piston cylinder, the bottom of the cooling tube is fixedly connected to the top of the pressurizing chamber, a nozzle is fixedly connected to the bottom of the pressurizing chamber, and a plurality of nozzle nozzles are arranged at the bottom of the nozzle.
Further, the drill bit device comprises the clamp plate, the clamp plate bottom is fixedly provided with a contact base, the upper contact base is internally provided with an upper contact, the upper contact is arranged below the lower contact which can be connected with the lower contact in the fifth cavity, the lower contact is fixedly connected to the top end of the lower contact block, the lower contact block is fixedly connected to the top of a second motor, the second motor is fixedly arranged on the drill bit sliding seat, a second motor shaft is rotatably arranged in the drill bit sliding seat, the bottom end of the second motor shaft is fixedly connected with a drill bit rotating seat, the bottom end of the drill bit rotating seat is fixedly connected with a drill bit shaft, a drill bit is arranged on the drill bit shaft, two spring seats are fixedly connected to the left end and the right end of the drill bit sliding seat and are symmetrical, and the spring seats are elastically connected to the bottom of.
Further, cleaning device includes in the fan seat first bevel gear, first bevel gear below and third bevel gear meshing, third bevel gear fixed connection is on second pivot top, the second pivot rotates to be connected the fuselage bottom with fan seat top, second pivot bottom fixedly connected with fourth bevel gear, fourth bevel gear and fifth bevel gear meshing, fifth bevel gear fixed connection is in the fan pivot, the fan pivot rotates to be connected in the fan seat, fan pivot left end fixedly connected with clearance fan.
The invention has the beneficial effects that: the utility model provides a formula of pushing down creeps into technology based on negative feedback temperature regulation, equipment structure is simple, and convenient operation has realized boring to the automation on ground, mutually supports and does not influence between each process, carries out real-time measuring to the temperature through negative feedback governing system, then can constantly cool down and can clear up the dust that drills out to the drill bit at the in-process of boring, has improved the practicality and the efficiency of device, the effectual waste of having avoided manpower and materials to reduce the cost by a wide margin.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic diagram of the overall structure of a down-pressure drilling process based on negative feedback temperature regulation according to the present invention.
Fig. 2 is an enlarged schematic view of a in fig. 1.
Fig. 3 is an enlarged structural diagram of B in fig. 2.
Detailed Description
The invention will now be described in detail with reference to fig. 1-3, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
The down-pressure drilling process based on negative feedback temperature regulation described in conjunction with the attached fig. 1-3 comprises a machine body 11 and two struts 16 fixedly connected to the left and right ends of the bottom end of the machine body 11 symmetrically, wherein a first cavity 61 is provided in the machine body 11, a third cavity 63 with a downward opening is provided in the machine body 11, two second cavities 62 are provided at the left and right ends of the third cavity 63 symmetrically, a threaded gear 12 is provided in the first cavity 61, the right side of the threaded gear 12 is engaged with a first gear 30, the first gear 30 is fixedly connected to a first rotating shaft 29, the first rotating shaft 29 is rotatably connected to the machine body 11, a second bevel gear 28 is fixedly connected to the bottom of the first rotating shaft 29, the second bevel gear 28 is engaged with a first bevel gear 27, the first bevel gear 27 is fixedly connected to the left end of a first motor shaft 26, the first motor shaft 26 is rotatably arranged in the first motor 25, the first motor 25 is fixedly arranged at the right end of the bottom of the machine body 11, the internal thread 13 is arranged inside the threaded gear 12, the threaded gear 12 is in threaded screw connection with the lead screw shell 14 through the internal thread 13, the lead screw shell 14 is arranged in the third cavity 63 in a vertically sliding manner, the drill body 15 is fixedly arranged inside the lead screw shell 14, the cleaning liquid cavity 31 is arranged inside the drill body 15, the cooling liquid is stored in the cleaning liquid cavity 31, the bottom of the lead screw shell 14 and the drill body 15 is fixedly connected with the pressing plate 34, the pressing plate 34 is arranged in the second cavity 62 in a vertically sliding manner, the bottom of the pressing plate 34 is fixedly connected with two piston rods 49 in a bilateral symmetry manner, the piston rods 49 are internally provided with the piston tube 58, and the piston tube 58 is communicated with the first cavity 61, a drill bit sliding seat 37 is arranged at the bottom of the third cavity 63 in a vertically sliding manner, a fifth cavity 65 is arranged in the drill bit sliding seat 37, two piston cylinders 38 which are bilaterally symmetrical are fixedly arranged at the bottom of the fifth cavity 65 on the drill bit sliding seat 37, a fourth cavity 64 is arranged in the piston cylinder 38, a piston head 53 is arranged in the fourth cavity 64 in a vertically sliding manner, a piston device 101 is arranged on the piston head 53, and the piston device 101 is used for injecting cooling liquid in the first cavity 61 into the fourth cavity 64; the bottom of the pressure plate 34 is provided with a drill bit device 102, and the drill bit device 102 is used for triggering a drill bit to rotate to drill on the ground after being pressed down; the bottom of the machine body 11 is fixedly connected with a fan seat 22 at the right side and the left end of the supporting column 16, a cleaning device 103 is arranged in the fan seat 22, and the cleaning device 103 is used for blowing away and cleaning dust generated in the drilling process.
Advantageously, the piston device 101 comprises the piston head 53, the top of the piston head 53 is fixedly connected to the bottom of the piston rod 49, a sixth cavity 66 is arranged in the piston head 53, a ball valve 57 is fixedly arranged at the top of the sixth cavity 66, the top end of the ball valve 57 is fixedly connected with the bottom of the piston pipe 58, the bottom of the sixth cavity 66 is fixedly provided with a ball valve chamber 55 at the bottom of the piston head 53, a seventh cavity 67 with an upward opening is arranged in the valve ball bin 55, a valve ball 54 is arranged in the seventh cavity 67, the bottom of the piston head 53 is provided with two piston holes 56 in a left-right symmetrical manner, the bottom of the fourth cavity 64 is fixedly provided with a cooling pipe 39 on the piston cylinder 38, the bottom end of the cooling pipe 39 is fixedly connected to the top end of the pressurizing bin 40, the bottom end of the pressurizing bin 40 is fixedly connected with a spray head 41, and a plurality of spray head nozzles 42 are arranged at the bottom of the spray head 41.
Advantageously, the drilling head device 102 comprises the pressure plate 34, the bottom of the pressure plate 34 is fixedly provided with an upper contact seat 51, an upper contact 50 is arranged in the upper contact seat 51, a lower contact 48 is arranged below the upper contact 50 and in the fifth cavity 65 and can be connected with the upper contact, the lower contact 48 is fixedly connected to the top end of the lower contact block 47, the lower contact block 47 is fixedly connected to the top of the second motor 46, the second motor 46 is fixedly arranged on the drill slide carriage 37, a second motor shaft 45 is rotatably arranged in the drill slide carriage 37, the bottom end of the second motor shaft 45 is fixedly connected with a drill bit rotary seat 44, the bottom end of the drill bit rotary seat 44 is fixedly connected with a drill bit shaft 43, the drill bit 17 is arranged on the drill bit shaft 43, two spring seats 36 are symmetrically and fixedly connected to the left end and the right end of the top of the drill bit sliding seat 37, and the spring seats 36 are elastically connected to the bottom of the pressing plate 34 through pressing plate springs 35.
Beneficially, the cleaning device 103 includes the first bevel gear 27 in the fan base 22, the lower portion of the first bevel gear 27 is engaged with the third bevel gear 24, the third bevel gear 24 is fixedly connected to the top end of the second rotating shaft 23, the second rotating shaft 23 is rotatably connected to the bottom of the machine body 11 and the top of the fan base 22, the bottom end of the second rotating shaft 23 is fixedly connected with the fourth bevel gear 21, the fourth bevel gear 21 is engaged with the fifth bevel gear 20, the fifth bevel gear 20 is fixedly connected to the fan rotating shaft 19, the fan rotating shaft 19 is rotatably connected in the fan base 22, and the left end of the fan rotating shaft 19 is fixedly connected with the cleaning fan 18.
Sequence of mechanical actions of the whole device:
when the device of the invention works, the first motor 25 is started, the first motor shaft 26 and the first bevel gear 27 on the first motor shaft 26 rotate to drive the second bevel gear 28 to rotate, the second bevel gear 28 drives the first rotating shaft 29 to rotate, the first rotating shaft 29 drives 60 to rotate, the first gear 30 drives the threaded gear 12 to rotate, as the threaded gear 12 is connected with the lead screw shell 14 through the internal thread 13, the threaded gear 12 rotates to drive the lead screw shell 14 to slide downwards, when the drill bit 17 abuts against the ground, the lead screw shell 14 slides downwards to press the pressing plate 34, the pressing plate 34 presses the pressing plate spring 35 downwards, the upper contact seat 51 is connected with the lower contact block 47, the upper contact 50 is connected with the lower contact 48 to trigger the second motor 46 to start, the second motor shaft 45 rotates to drive the drill bit rotary seat 44 to rotate, the drill bit rotary seat 44 drives the drill bit shaft 43 to rotate, the drill bit 17 to drill on the ground, the cooling fluid in the cleaning fluid chamber 31 flows through the piston tube 58 through the ball valve 57 into the sixth cavity 66 and from the piston bore 56 into the fourth cavity 64, when the pressure plate 34 slides downwards, the piston rod 49 drives the piston head 53 to slide downwards in the fourth cavity 64, the cooling liquid pushes the valve ball 54 upwards in the seventh cavity 67 to close the ball valve 57, the cooling liquid in the fourth cavity 64 flows into the spray head 41 through the cooling pipe 39 and the pressurizing bin 40 and is sprayed out from the spray head nozzle 42 under the pressure in the spray head 41, the drill bit is cooled, the first bevel gear 27 drives the third bevel gear 24 to rotate, the third bevel gear 24 drives the second rotating shaft 23 to rotate, the second rotating shaft 23 drives the fourth bevel gear 21 to rotate, the fourth bevel gear 21 drives the fifth bevel gear 20 to rotate, the fifth bevel gear 20 drives the fan rotating shaft 19 to rotate, and the fan rotating shaft 19 drives the cleaning fan 18 to rotate, so that dust generated in the drilling process is cleaned.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (4)
1. The utility model provides a formula of pushing down creeps into technology based on negative feedback temperature regulation, include the fuselage and two pillars of fixedly connected with of both ends symmetry about the fuselage bottom, its characterized in that: a first cavity is arranged in the machine body, a third cavity with a downward opening is arranged in the machine body, two second cavities are symmetrically arranged at two ends of the third cavity in a left-right mode, a threaded gear is arranged in the first cavity, the right side of the threaded gear is meshed with a first gear, the first gear is fixedly connected to a first rotating shaft, the first rotating shaft is rotatably connected to the machine body, a second bevel gear is fixedly connected to the bottom of the first rotating shaft and is meshed with a first bevel gear, the first bevel gear is fixedly connected to the left end of a first motor shaft, the first motor shaft is rotatably arranged in a first motor, the first motor is fixedly arranged at the right end of the bottom of the machine body, internal threads are arranged in the threaded gear, the threaded gear is connected with a threaded screw rod of a screw rod shell through the internal threads, and the screw rod shell is arranged in the third cavity in a vertically sliding mode, a drill body is fixedly arranged in the screw shell, a cleaning liquid cavity is arranged in the drill body, cooling liquid is stored in the cleaning liquid cavity, the screw rod shell and the bottom of the drill body are fixedly connected with a pressure plate, the pressure plate can be arranged in the second cavity in a vertically sliding manner, two piston rods are fixedly connected at the bottom of the pressure plate in a bilateral symmetry manner, piston tubes are arranged in the piston rods, the piston pipe is communicated with the first cavity, the bottom of the third cavity is provided with a drill bit sliding seat which can slide up and down, a fifth cavity is arranged in the drill bit sliding seat, two piston cylinders which are bilaterally symmetrical are fixedly arranged at the bottom of the fifth cavity on the drill bit sliding seat, a fourth cavity is arranged in the piston cylinder, a piston head is arranged in the fourth cavity in a vertically sliding manner, the piston head is provided with a piston device, and the piston device is used for injecting cooling liquid in the first cavity into the fourth cavity; the drill bit device is arranged at the bottom of the pressing plate and used for triggering the drill bit to rotate to drill on the ground after being pressed down; the bottom of the machine body is arranged on the right side, the left end of the supporting column is fixedly connected with a fan seat, a cleaning device is arranged in the fan seat, and the cleaning device is used for blowing away and cleaning dust generated in the drilling process.
2. The negative feedback temperature regulation-based down-pressure drilling process of claim 1, wherein: the piston device comprises a piston head, the top of the piston head is fixedly connected to the bottom of a piston rod, a sixth cavity is arranged in the piston head, a ball valve is fixedly arranged at the top of the sixth cavity, the top of the ball valve is fixedly connected to the bottom of a piston tube, a valve ball bin is fixedly arranged at the bottom of the piston head, a seventh cavity with an upward opening is arranged in the valve ball bin, a valve ball body is arranged in the seventh cavity, two piston holes are symmetrically arranged at the bottom of the piston head in a bilateral mode, a cooling tube is fixedly arranged on a piston cylinder at the bottom of the fourth cavity, the bottom of the cooling tube is fixedly connected to the top of a pressurizing bin, a nozzle is fixedly connected to the bottom of the pressurizing bin, and a plurality of nozzle nozzles are.
3. The negative feedback temperature regulation-based down-pressure drilling process of claim 1, wherein: the drill bit device comprises the clamp plate, the clamp plate bottom is fixedly provided with and touches the seat, on touch the inside contact that is provided with of seat, go up the contact below can be connected with it in the fifth cavity and be provided with down the contact, contact fixed connection is on the contact top down, contact fixed connection is at second motor top down, the second motor is fixed to be set up on the drill bit slide, the rotatable second motor shaft that is provided with in the drill bit slide, second motor shaft bottom fixedly connected with drill bit swivel mount, drill bit swivel mount bottom fixedly connected with drill bit axle, the epaxial drill bit that is provided with of drill bit, two spring holders of fixedly connected with of both ends symmetry about drill bit slide top, the spring holder passes through clamp plate spring elastic connection and is in the clamp plate bottom.
4. The negative feedback temperature regulation-based down-pressure drilling process of claim 1, wherein: cleaning device includes in the fan seat first bevel gear, first bevel gear below and third bevel gear meshing, third bevel gear fixed connection is on second pivot top, the second pivot rotates to be connected the fuselage bottom with fan seat top, second pivot bottom fixedly connected with fourth bevel gear, fourth bevel gear and fifth bevel gear meshing, fifth bevel gear fixed connection is in the fan pivot, the fan pivot rotates to be connected in the fan seat, fan pivot left end fixedly connected with clearance fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110063626.7A CN112647876A (en) | 2021-01-18 | 2021-01-18 | Down-pressing type drilling process based on negative feedback temperature regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110063626.7A CN112647876A (en) | 2021-01-18 | 2021-01-18 | Down-pressing type drilling process based on negative feedback temperature regulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112647876A true CN112647876A (en) | 2021-04-13 |
Family
ID=75368512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110063626.7A Withdrawn CN112647876A (en) | 2021-01-18 | 2021-01-18 | Down-pressing type drilling process based on negative feedback temperature regulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112647876A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115324489A (en) * | 2022-08-18 | 2022-11-11 | 浙江成明公路建设有限公司 | Be applicable to soil stratum rock stratum and creep into auto-change over device |
-
2021
- 2021-01-18 CN CN202110063626.7A patent/CN112647876A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115324489A (en) * | 2022-08-18 | 2022-11-11 | 浙江成明公路建设有限公司 | Be applicable to soil stratum rock stratum and creep into auto-change over device |
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Application publication date: 20210413 |