CN107524644B - Self-adaptive hydraulic control loop for thrust pressure of down-the-hole drill - Google Patents
Self-adaptive hydraulic control loop for thrust pressure of down-the-hole drill Download PDFInfo
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- CN107524644B CN107524644B CN201710499689.0A CN201710499689A CN107524644B CN 107524644 B CN107524644 B CN 107524644B CN 201710499689 A CN201710499689 A CN 201710499689A CN 107524644 B CN107524644 B CN 107524644B
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- Prior art keywords
- oil
- valve
- control
- way
- pressure
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- 230000003044 adaptive effect Effects 0.000 claims description 5
- 238000013016 damping Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 238000005553 drilling Methods 0.000 description 15
- 239000011435 rock Substances 0.000 description 7
- 230000006978 adaptation Effects 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
-
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50554—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure downstream of the pressure control means, e.g. pressure reducing valve
Landscapes
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a self-adaptive hydraulic control loop of a downhole drill propelling pressure, which comprises a propelling oil cylinder and a rotary motor, wherein a rod cavity of the propelling oil cylinder is connected with a first oil way, and a rodless cavity is connected with a second oil way; the two oil ports of the rotary motor are respectively connected with a third oil way and a fourth oil way; the control circuit comprises a first control oil circuit and a second control oil circuit; the first control oil way is provided with a pressure self-adaptive control valve, the oil outlet end of the pressure self-adaptive control valve is connected with the control oil port of the unidirectional pilot-type pressure reducing valve, and the oil inlet end of the pressure self-adaptive control valve is connected with the first oil way; a shuttle valve is arranged on the second control oil path, and an oil outlet of the shuttle valve is connected with a control oil port of the first overflow valve; one end of the pressure self-adaptive control valve is provided with a first control oil port, the other end of the pressure self-adaptive control valve is provided with a second control oil port and a spring, the first control oil port is connected with a second control oil path, and the second control oil port is connected with the oil inlet end of the pressure self-adaptive control valve.
Description
Technical Field
The invention belongs to the technical field of hydraulic systems, and particularly relates to a self-adaptive hydraulic control loop for the propelling pressure of a down-the-hole drill.
Background
The down-the-hole drill is high-efficiency drilling equipment, high-end products in the market are basically monopolized by foreign products, and domestic manufacturers mainly use medium-low-end products, wherein the output of the low-end products is maximum. At present, the low-end product basically does not have a controller, and only the most basic functions can be realized by adopting manual control. When the down-the-hole drill drills, the drill bit goes deep underground, the structure of the rock stratum changes along with the increase of the drilling depth, the dead weight of the drill rod increases, the resistance between the drill bit and the rock stratum increases if the pushing pressure is unchanged, and when the resistance exceeds the torque of a motor, the phenomenon of drill sticking occurs, so that the drilling efficiency and the service life of equipment are greatly influenced. When the rock stratum is harder, the operator is required to manually adjust the pushing pressure to improve the drilling efficiency, and the skill requirement on the operator is high.
Disclosure of Invention
In view of the above, the invention aims to provide a self-adaptive hydraulic control loop for the thrust pressure of a down-the-hole drill, which can realize the adaptation of the thrust pressure, the rotation pressure and the weight of a drill rod by means of hydraulic control, improve the drilling efficiency and the adaptation capability of equipment, automatically prevent drill sticking and reduce the operation strength of workers.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the self-adaptive hydraulic control loop for the thrust pressure of the down-the-hole drill comprises a thrust cylinder and a rotary motor, wherein a rod cavity of the thrust cylinder is connected with a first oil way, a rodless cavity is connected with a second oil way, and a first multi-way valve is connected with the first oil way and the second oil way; a third oil way and a fourth oil way are respectively connected to the two oil ports of the rotary motor, and a second multi-way valve is connected to the third oil way and the fourth oil way; the oil inlets of the first multi-way valve and the second multi-way valve are respectively connected with an oil source;
a first overflow valve is arranged between the first oil way and the second oil way, and a unidirectional pilot type pressure reducing valve is arranged on the first oil way; a second overflow valve is arranged between the third oil way and the fourth oil way;
the control circuit comprises a first control oil circuit and a second control oil circuit arranged between the first oil circuit and a fourth oil circuit;
the first control oil way is provided with a pressure self-adaptive control valve, the oil outlet end of the pressure self-adaptive control valve is connected with the control oil port of the unidirectional pilot-operated pressure reducing valve, and the oil inlet end of the pressure self-adaptive control valve is connected with the first oil way;
a shuttle valve is arranged on the second control oil path, and an oil outlet of the shuttle valve is connected with a control oil port of the first overflow valve;
one end of the pressure self-adaptive control valve is provided with a first control oil port, the other end of the pressure self-adaptive control valve is provided with a second control oil port and a spring, the control oil port is provided with a damping hole, the first control oil port is connected with the second control oil path, and the second control oil port is connected with the oil inlet end of the pressure self-adaptive control valve.
Further, a hydraulic control type one-way valve is arranged between the one-way pilot type pressure reducing valve and the propulsion oil cylinder, and a control port of the hydraulic control type one-way valve is connected with the second oil way.
Furthermore, the oil inlet end of the pressure self-adaptive control valve is also connected with the pressure self-adaptive control valve in series and is provided with a direct-acting pressure reducing valve.
Further, a pressure relay is arranged between the shuttle valve and the fourth oil path.
Further, a throttle valve and a one-way valve are arranged in series between the first oil way and the fourth oil way.
The principle of the self-adaptive hydraulic control loop of the thrust pressure of the down-the-hole drill of the invention is as follows: when the rock stratum is softened during drilling, the propulsion depth is increased, at the moment, the rotation resistance is increased, the rotation pressure is increased, the control pressure at the left side of the pressure self-adaptive control valve is increased, the valve core is pushed to move rightwards, the pressure of oil at the control port of the pilot reducing valve is reduced, the valve core opening is reduced, the propulsion pressure is reduced, the propulsion depth is reduced, the resistance is reduced, and the rotation pressure is recovered to be normal; when the rotation pressure or the propelling pressure cannot automatically exceed the set pressure of the overflow valve, the overflow valve between the first oil way and the second oil way works, the propelling is carried out to enter a floating state, and a signal is sent to an operator; when the drilling hole is hardened in rock stratum, the pushing depth is reduced, the rotation resistance is reduced, the drilling efficiency is low, at the moment, the control pressure at the left side of the pressure self-adaptive control valve is reduced, the valve core moves leftwards, the pressure of the control port of the pilot relief valve is increased, the opening of the valve core is increased, the pushing pressure is increased, the pushing depth is increased, and the drilling efficiency is improved.
The invention has the beneficial effects that:
the self-adaptive hydraulic control loop of the down-the-hole drill propulsion pressure can automatically realize the adaptation of the propulsion pressure, the rotation pressure and the weight of a drill rod, is applied to a down-the-hole drill at the low end, can improve the drilling efficiency of equipment and realize the automatic anti-sticking function; the pure hydraulic control loop is adopted for control, so that the existing equipment can be conveniently modified, and the modification cost is low; the operator only needs to basically operate, and the skill requirement on the operator is reduced.
Drawings
In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention provides the following drawings for description:
FIG. 1 is a fluid circuit diagram of an embodiment of a downhole drill feed pressure adaptive hydraulic control circuit of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to limit the invention, so that those skilled in the art may better understand the invention and practice it.
As shown in fig. 1, a hydraulic circuit diagram of an embodiment of the downhole drill feed pressure adaptive hydraulic control circuit of the present invention is shown. The self-adaptive hydraulic control loop of the thrust pressure of the down-the-hole drill comprises a thrust cylinder 13 and a rotary motor 16, wherein a rod cavity of the thrust cylinder 13 is connected with a first oil way 1, a rodless cavity is connected with a second oil way 2, and the first oil way 1 and the second oil way 2 are connected with a first multi-way valve 9; the two oil ports of the rotary motor 16 are respectively connected with a third oil way 3 and a fourth oil way 4, and the third oil way 3 and the fourth oil way 4 are connected with a second multiway valve 14; the oil inlets of the first multi-way valve 9 and the second multi-way valve 14 are respectively connected with an oil source.
A first overflow valve 10 is arranged between the first oil way and the second oil way, and a unidirectional pilot-operated pressure reducing valve 11 is arranged on the first oil way; a second relief valve 15 is provided between the third oil passage and the fourth oil passage. A hydraulic control type one-way valve 12 is arranged between the one-way pilot type pressure reducing valve 11 and the propulsion cylinder 13, and a control port of the hydraulic control type one-way valve 12 is connected with the second oil way 2.
The downhole drill advancing pressure adaptive hydraulic control circuit of the present embodiment further includes a control circuit including a first control oil passage 5 and a second control oil passage 6 provided between the first oil passage 1 and the fourth oil passage 4. Specifically, the first control oil path 5 is provided with a pressure self-adaptive control valve 20, an oil outlet end of the pressure self-adaptive control valve 20 is connected with a control oil port of the unidirectional pilot-operated pressure reducing valve 11, an oil inlet end of the pressure self-adaptive control valve 20 is connected with the first oil path 14, and an oil inlet end of the pressure self-adaptive control valve 20 is further provided with a direct-acting pressure reducing valve 19 in series connection with the oil inlet end. A throttle valve 17 and a one-way valve 18 are arranged in series between the first oil passage 1 and the fourth oil passage 4.
The second control oil way 6 is provided with a shuttle valve 21, and an oil outlet of the shuttle valve 21 is connected with a control oil port of the first overflow valve 10. A pressure relay 22 is provided between the shuttle valve 21 and the fourth oil passage 4. One end of the pressure self-adaptive control valve 20 of the embodiment is provided with a first control oil port, the other end is provided with a second control oil port and a spring, the control oil port is provided with a damping hole, the first control oil port is connected with the second control oil path 6, and the second control oil port is connected with the oil inlet end of the pressure self-adaptive control valve 20.
The principle of the self-adaptive hydraulic control loop of the pushing pressure of the down-the-hole drill in the embodiment is as follows: when the rock stratum is softened during drilling, the propulsion depth is increased, at the moment, the rotation resistance is increased, the rotation pressure is increased, the control pressure at the left side of the pressure self-adaptive control valve is increased, the valve core is pushed to move rightwards, the pressure of oil at the control port of the pilot reducing valve is reduced, the valve core opening is reduced, the propulsion pressure is reduced, the propulsion depth is reduced, the resistance is reduced, and the rotation pressure is recovered to be normal; when the rotation pressure or the propelling pressure cannot automatically exceed the set pressure of the overflow valve, the overflow valve between the first oil way and the second oil way works, the propelling is carried out to enter a floating state, and the pressure relay is conducted to send a signal to an operator; when the drilling hole is hardened in rock stratum, the pushing depth is reduced, the rotation resistance is reduced, the drilling efficiency is low, at the moment, the control pressure at the left side of the pressure self-adaptive control valve is reduced, the valve core moves leftwards, the pressure of the control port of the pilot relief valve is increased, the opening of the valve core is increased, the pushing pressure is increased, the pushing depth is increased, and the drilling efficiency is improved.
The beneficial effects of this embodiment lie in:
the self-adaptive hydraulic control loop of the down-the-hole drill propulsion pressure can automatically realize the adaptation of the propulsion pressure, the rotation pressure and the weight of a drill rod, is applied to a down-the-hole drill at the low end, can improve the drilling efficiency of equipment and realize the automatic anti-sticking function; the pure hydraulic control loop is adopted for control, so that the existing equipment can be conveniently modified, and the modification cost is low; the operator only needs to basically operate, and the skill requirement on the operator is reduced.
The above-described embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention. The protection scope of the invention is subject to the claims.
Claims (3)
1. The self-adaptive hydraulic control loop of the thrust pressure of the down-the-hole drill comprises a thrust cylinder (13) and a rotary motor (16), wherein a rod cavity of the thrust cylinder (13) is connected with a first oil way (1), a rodless cavity is connected with a second oil way (2), and the first oil way (1) and the second oil way (2) are connected with a first multi-way valve (9); a third oil way (3) and a fourth oil way (4) are respectively connected to two oil ports of the rotary motor (16), and a second multi-way valve (14) is connected to the third oil way (3) and the fourth oil way (4); the oil inlets of the first multi-way valve (9) and the second multi-way valve (14) are respectively connected with an oil source; the method is characterized in that:
a first overflow valve (10) is arranged between the first oil way and the second oil way, a unidirectional pilot-operated pressure reducing valve (11) is arranged on the first oil way, a hydraulic control type one-way valve (12) is arranged between the unidirectional pilot-operated pressure reducing valve (11) and the propulsion oil cylinder (13), and a control port of the hydraulic control type one-way valve (12) is connected with the second oil way (2); a second overflow valve (15) is arranged between the third oil way and the fourth oil way;
the control circuit comprises a first control oil circuit (5) and a second control oil circuit (6) arranged between the first oil circuit (1) and the fourth oil circuit (4);
the first control oil way (5) is provided with a pressure self-adaptive control valve (20), an oil outlet end of the pressure self-adaptive control valve (20) is connected with a control oil port of the unidirectional pilot-operated pressure reducing valve (11), an oil inlet end of the pressure self-adaptive control valve (20) is connected with the first oil way, and an oil inlet end of the pressure self-adaptive control valve (20) is further provided with a direct-acting pressure reducing valve (19) in series connection with the oil inlet end of the pressure self-adaptive control valve;
a shuttle valve (21) is arranged on the second control oil way (6), and an oil outlet of the shuttle valve (21) is connected with a control oil port of the first overflow valve (10);
one end of the pressure self-adaptive control valve (20) is provided with a first control oil port, the other end of the pressure self-adaptive control valve is provided with a second control oil port and a spring, the control oil port is provided with a damping hole, the first control oil port is connected with the second control oil path, and the second control oil port is connected with the oil inlet end of the pressure self-adaptive control valve (20).
2. The down-the-hole drill advancing pressure adaptive hydraulic control circuit of claim 1, characterized by: a pressure relay (22) is arranged between the shuttle valve (21) and the fourth oil way (4).
3. The down-the-hole drill advancing pressure adaptive hydraulic control circuit of claim 1, characterized by: a throttle valve (17) and a one-way valve (18) are arranged in series between the first oil way (1) and the fourth oil way (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710499689.0A CN107524644B (en) | 2017-06-27 | 2017-06-27 | Self-adaptive hydraulic control loop for thrust pressure of down-the-hole drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710499689.0A CN107524644B (en) | 2017-06-27 | 2017-06-27 | Self-adaptive hydraulic control loop for thrust pressure of down-the-hole drill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107524644A CN107524644A (en) | 2017-12-29 |
| CN107524644B true CN107524644B (en) | 2024-03-01 |
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ID=60748778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710499689.0A Active CN107524644B (en) | 2017-06-27 | 2017-06-27 | Self-adaptive hydraulic control loop for thrust pressure of down-the-hole drill |
Country Status (1)
| Country | Link |
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| CN (1) | CN107524644B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0754568A (en) * | 1993-08-12 | 1995-02-28 | Kato Works Co Ltd | Control device for hydraulic motor to drive kelly-bar |
| JPH07119708A (en) * | 1993-10-26 | 1995-05-09 | Komatsu Ltd | Oil pressure circuit for rotation |
| JPH09195308A (en) * | 1996-01-19 | 1997-07-29 | Sumitomo Constr Mach Co Ltd | Controlling circuit of hydraulic shovel |
| CN2858923Y (en) * | 2005-12-31 | 2007-01-17 | 中南大学 | Electro-hydraulic proportion pressuring device for rotary digger |
| CN102996070A (en) * | 2012-11-19 | 2013-03-27 | 无锡市京锡冶金液压机电有限公司 | Automatic anti-blocking method of down-the-hole drill |
| CN202867386U (en) * | 2012-11-14 | 2013-04-10 | 中煤科工集团重庆研究院 | Drill loader hydraulic anti-jamming control system |
| CN203022763U (en) * | 2012-11-30 | 2013-06-26 | 中煤科工集团重庆研究院 | Hydraulic control system of drill loader |
| CN205743871U (en) * | 2016-05-10 | 2016-11-30 | 山河智能装备股份有限公司 | A kind of down-the-hole drill automatic anti-blocking bar controlling |
| CN206889375U (en) * | 2017-06-27 | 2018-01-16 | 衢州职业技术学院 | Down-the-hole drill propelling pressure self-adaptive hydraulic control loop |
-
2017
- 2017-06-27 CN CN201710499689.0A patent/CN107524644B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0754568A (en) * | 1993-08-12 | 1995-02-28 | Kato Works Co Ltd | Control device for hydraulic motor to drive kelly-bar |
| JPH07119708A (en) * | 1993-10-26 | 1995-05-09 | Komatsu Ltd | Oil pressure circuit for rotation |
| JPH09195308A (en) * | 1996-01-19 | 1997-07-29 | Sumitomo Constr Mach Co Ltd | Controlling circuit of hydraulic shovel |
| CN2858923Y (en) * | 2005-12-31 | 2007-01-17 | 中南大学 | Electro-hydraulic proportion pressuring device for rotary digger |
| CN202867386U (en) * | 2012-11-14 | 2013-04-10 | 中煤科工集团重庆研究院 | Drill loader hydraulic anti-jamming control system |
| CN102996070A (en) * | 2012-11-19 | 2013-03-27 | 无锡市京锡冶金液压机电有限公司 | Automatic anti-blocking method of down-the-hole drill |
| CN203022763U (en) * | 2012-11-30 | 2013-06-26 | 中煤科工集团重庆研究院 | Hydraulic control system of drill loader |
| CN205743871U (en) * | 2016-05-10 | 2016-11-30 | 山河智能装备股份有限公司 | A kind of down-the-hole drill automatic anti-blocking bar controlling |
| CN206889375U (en) * | 2017-06-27 | 2018-01-16 | 衢州职业技术学院 | Down-the-hole drill propelling pressure self-adaptive hydraulic control loop |
Also Published As
| Publication number | Publication date |
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| CN107524644A (en) | 2017-12-29 |
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