CN108104794B - Hydraulic logic control system and method for drilling machine - Google Patents
Hydraulic logic control system and method for drilling machine Download PDFInfo
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- CN108104794B CN108104794B CN201711272846.0A CN201711272846A CN108104794B CN 108104794 B CN108104794 B CN 108104794B CN 201711272846 A CN201711272846 A CN 201711272846A CN 108104794 B CN108104794 B CN 108104794B
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- 238000005553 drilling Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 abstract description 32
- 230000009471 action Effects 0.000 abstract description 14
- 239000003921 oil Substances 0.000 description 50
- 238000010586 diagram Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 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
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
- E21B44/02—Automatic control of the tool feed
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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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
- F15B2211/20584—Combinations of pumps with high and low capacity
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
- F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
- F15B2211/31594—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having multiple pressure sources and multiple output members
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- Fluid Mechanics (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a logic control system and a logic control method, belongs to the technical field of drilling machines, and particularly relates to a hydraulic logic control system and a hydraulic logic control method for a drilling machine. The system and the method add a logic control loop in a hydraulic system of the drilling machine, automatically select the matching relation among the feeding and pulling oil cylinder, the rotary motor, the chuck and the clamper according to different working conditions of the drilling machine, automatically control the actions of all mechanisms by the logic control loop, avoid drilling accidents caused by misoperation, and have simple operation of the drilling machine and low labor intensity.
Description
Technical Field
The invention relates to a logic control system and a logic control method, belongs to the technical field of drilling machines, and particularly relates to a hydraulic logic control system and a hydraulic logic control method for a drilling machine.
Background
In the process of operating the drilling machine, the mutual matching between the actions of main actuating mechanisms such as a rotary motor and a pulling oil cylinder and auxiliary mechanisms such as a normally open chuck and a normally closed clamp holder is mainly involved. In different drilling processes, the operating sequence and the operating state of each actuating mechanism and each auxiliary mechanism are different, and drilling machine operators need to control the actions of each actuating mechanism and each auxiliary mechanism according to different processes so as to complete drilling tasks. The drilling machine executing mechanism and the auxiliary mechanism are generally controlled by hydraulic pressure, and because each executing mechanism and each auxiliary mechanism of the drilling machine are controlled independently or partially by linkage control, a drilling machine operator needs to operate a plurality of hydraulic valves to complete the operation of the drilling machine on the premise of being familiar with the functions of each executing mechanism of the drilling machine and the working states of the corresponding executing mechanisms of different working procedures. In the rod-reversing process, if the driller is unskilled in operation, the rod-reversing efficiency is directly influenced. If the operation is wrong, accidents such as drill falling, drilling tool damage and the like occur, and the matching relation among the actuating mechanisms needs to be frequently switched, so that the labor intensity of workers is high, and the efficiency is low.
At present, some drilling machines adopt partial linkage control, a working oil line of a main actuating mechanism is connected with a working oil line of an auxiliary mechanism, and the working pressure oil of the actuating mechanism controls the action of the auxiliary mechanism. The general solution is to add a backpressure valve in the oil circuit of the actuating mechanism, adjust the backpressure according to the load and flow of the actuating mechanism. This method causes a large pressure loss in the hydraulic system. The temperature of hydraulic oil is increased quickly due to large pressure loss, so that the system is overheated, and a drilling machine needs to be matched with a high-efficiency hydraulic heat dissipation system. Meanwhile, drillers are required to frequently adjust the backpressure valve to meet the requirement of auxiliary loop pressure, and under partial working conditions, the performance of the drilling machine efficiency is influenced because the auxiliary pressure cannot be adjusted to the requirement of a system. The other solution is to apply the electronic technology to the control of the drilling machine to realize the logic control of the actuating mechanism and the auxiliary mechanism, and the scheme can realize the automatic control, but the electronic control technology has higher requirements on the comprehensive quality of drillers and is limited by the cost of the drilling machine and the subsequent maintenance cost. Because the existing drilling machine mostly adopts full hydraulic control, the application and popularization of the electronic technology have certain limitations.
Disclosure of Invention
The invention mainly solves the technical problems of complex operation of a drilling machine, easy misoperation, large system pressure and flow loss, high efficiency and the like in the prior art, and provides a hydraulic logic control system and a hydraulic logic control method for the drilling machine. According to the system and the method, a logic control loop is added in a hydraulic system of the drilling machine, the matching relation among the pulling oil cylinder, the rotary motor, the normally open chuck and the normally closed clamp holder is automatically selected according to different working conditions of the drilling machine, the logic control loop automatically controls the actions of all mechanisms, drilling accidents caused by misoperation can be avoided, and the drilling machine is simple to operate and low in labor intensity.
The technical problem of the invention is mainly solved by the following technical scheme:
a drilling rig hydraulic logic control system comprising:
the pump station is provided with a large-displacement main pump and a small-displacement auxiliary pump;
a high-low speed pulling logic loop for controlling the pulling speed of the pulling oil cylinder;
the high-speed and low-speed pulling logic circuit comprises a high-speed feeding multi-way valve, a low-speed feeding multi-way valve, a shuttle valve and a hydraulic control reversing valve; an A, B port of the quick feeding multi-way valve is connected with a A, B port of the shuttle valve, and a C port of the shuttle valve is connected with a hydraulic control port X of the hydraulic control reversing valve; a, B ports of the slow feeding multi-way valve are connected with A 'and B' ports of the hydraulic control reversing valve; the fast feeding multi-way valve A, B is connected with the slow feeding multi-way valve A, B and then connected with the pulling oil cylinder A, B.
Preferably, the hydraulic logic control system for the drilling machine further comprises: a normally open chuck normally closed gripper logic loop for controlling the working state conversion of the drilling machine part; the normally open chuck normally closed gripper logic circuit further comprises: a tripping logic control loop and a rotary logic control loop;
the system comprises a pull-out and pull-down logic control loop, a shuttle valve, a hydraulic control reversing valve, a pull-up oil cylinder loop, a pull-out oil cylinder loop and a pull-up oil cylinder loop, wherein the pull-out and pull-down logic control loop acquires the state of a quick feeding multi-way valve through the shuttle valve, controls the hydraulic control reversing valve to stop the slow feeding multi-way valve when the quick feeding multi-way valve works, and communicates the slow feeding multi-way valve with the;
wherein the rotary logic control loop acquires the state of the power head through the shuttle valve (302a), and when the power head rotates, high-pressure oil controls the normally-open chuck control hydraulic control valve (302b) and the normally-closed clamp holder control hydraulic control valve to control reversing through the shuttle valve (302a), thereby controlling the normally-open chuck and the normally-closed clamp holder to be opened and closed.
Preferably, the hydraulic logic control system for the drilling machine further comprises:
a power head locking logic circuit for controlling the locking and floating conversion of the pulling oil cylinder; the power head locking logic circuit further comprises:
shuttle valves (401, 402), pilot operated check valves (404, 405);
the shuttle valve acquires the states of the pulling oil cylinder and the rotary motor, and when high-pressure oil flows into the pulling oil cylinder or the rotary motor, the high-pressure oil controls the hydraulic control one-way valve to be opened; when the oil cylinder is pulled up or the rotary motor does not work, the hydraulic control one-way valve locks the oil cylinder.
Preferably, the hydraulic logic control system for the drilling machine further comprises: a pressure control circuit for effecting pressure regulation; the pressure control loop oil source is taken from a small-displacement auxiliary pump and comprises two manual pressure reducing valves, wherein one manual pressure reducing valve controls slow feeding pressure, and the other manual pressure reducing valve controls normally-open chuck clamping force.
The control method of the hydraulic logic control system of the drilling machine comprises the following steps: when the fast feeding multi-way valve acts, the pressure oil controls the hydraulic control reversing valve to work at an upper position through the shuttle valve, and the port A, B of the slow feeding multi-way valve is cut off. The rapid feeding multi-way valve controls the pulling oil cylinder to realize rapid feeding and pulling; when the fast feeding multi-way valve is positioned at the middle position, the hydraulic control reversing valve works at the lower position, the port A, B of the slow feeding multi-way valve is operated to stop communication, and the slow feeding multi-way valve controls the pulling oil cylinder to realize slow feeding pulling.
Preferably, the control method of the hydraulic logic control system of the drilling machine comprises the following steps:
the upper position of the multi-way valve is converted into a drilling logic by the drilling function, and when the multi-way valve is fed fast or fed slowly to a feeding position, the normally open chuck is automatically clamped, and the normally closed clamp is automatically released; when the fast feeding multi-way valve or the slow feeding multi-way valve is operated to a lifting position, the normally open chuck is loosened, and the normally closed clamp is clamped.
And the lower position of the multi-way valve is converted into a drilling logic by the drilling function, and when the multi-way valve is fed fast or fed slowly to a feeding position, the normally open chuck is automatically released, and the normally closed clamp is automatically clamped. When the fast feeding multi-way valve or the slow feeding multi-way valve is operated to a lifting position, the normally open chuck clamps and the normally closed clamp is loosened.
Preferably, the control method of the hydraulic logic control system of the drilling machine comprises the following steps: in a rotary logic control loop, the shuttle valve acquires the state of a rotary motor, and logically controls the normally open chuck and the normally closed clamp holder, the rotary motor rotates forwards and the normally open chuck is clamped, and the normally closed clamp holder releases to drill; the rotary motor rotates forwards and the normally open type chuck clamps, the stop valve is stopped, and the normally closed type clamp is clamped and fastened; the rotary motor reversely rotates to clamp the normally open chuck and the normally closed clamp holder to clamp the shackle.
Preferably, the control method of the hydraulic logic control system of the drilling machine comprises the following steps: in the power head locking logic circuit, the shuttle valve acquires the state of a rotary motor, the shuttle valve acquires the state of a pulling oil cylinder, a logic control network is formed by the shuttle valves to control the opening and closing of the hydraulic one-way valve, when the rotary motor rotates or the multi-way valve is fed fast or fed slowly, the hydraulic one-way valve is opened, otherwise, the pulling oil cylinder is locked by the hydraulic one-way valve, and the throttle valve realizes reduced pressure drilling.
Therefore, the invention has the following advantages: the hydraulic control method is characterized in that hydraulic logic control is carried out among the rotary motor of the drilling machine, the normally open chuck, the normally closed clamp holder and the pulling oil cylinder, when the power head and the motor act, the normally open chuck and the normally closed clamp holder automatically cooperate with auxiliary action through a logic control network, the drilling machine is simple to operate, the labor intensity of workers is low, and the auxiliary action automatically cooperates with the main execution mechanism to act, so that the operation efficiency of the drilling machine is improved. The hydraulic control method is adopted to realize the action logic control between the actuating mechanism and the auxiliary mechanism, and the requirement on the number degree of drilling machine operators is reduced. Meanwhile, a complex electric control system is not needed, the use and maintenance cost of the system is reduced, and the requirement on the comprehensive quality of drillers is low. Meanwhile, the logic control loop does not need overlarge system back pressure and flow, so that the energy loss of the hydraulic system is reduced, and the heat generation of the hydraulic system is reduced.
Drawings
FIG. 1 is a rig hydraulic logic control system;
FIG. 2 is a hydraulic schematic diagram of a fast and slow pull-up logic circuit of the present invention;
FIG. 3 is a hydraulic schematic diagram of a logic circuit of a normally closed gripper of the normally open chuck of the present invention;
FIG. 4 is a schematic diagram of the locking logic circuit hydraulic system of the power head of the present invention;
fig. 5 is a schematic diagram of the pressure control circuit of the present invention.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b):
referring to fig. 1, fig. 1 is a hydraulic schematic diagram of an embodiment of the present invention, which includes a pump station 1, a fast-slow feeding and pulling logic circuit 2, a normally open chuck and normally closed type clamp logic circuit 3, a power head locking logic circuit 4, a pressure control circuit 5, a rotary motor 6, a normally open chuck 7, a normally closed type clamp 8 and a pulling cylinder 9.
The pump station 1 is preferably a double pump, the main pump 101 selects a large-displacement pump to realize quick rotation and quick feeding and pulling of the power head, the auxiliary pump 102 selects a small-displacement pump preferably a constant-pressure variable-displacement pump, the pressure of the auxiliary loop is kept constant, and slow feeding and pulling and oil supply for the auxiliary loop are realized. The fast and slow speed pulling logic circuit 2 realizes the switching of feeding fast pulling and slow feeding pulling; the normally open chuck normally closed gripper logic circuit 3 controls the switching of the working states of a rotary motor 6, a normally open chuck 7, a normally closed gripper 8 and a pulling oil cylinder 9 aiming at the structural action of the drilling machine; the power head locking logic circuit 4 controls the locking and floating conversion of the pulling oil cylinder 9 under different working conditions; the pressure control loop 5 realizes the pressure regulation of a normally open chuck 7, a normally closed clamp holder 8 and a pulling oil cylinder 9 of the drilling machine.
Referring to fig. 2, fig. 2 is a fast and slow pull-up logic circuit 2, which includes a fast feed multiplex valve 201, a slow feed multiplex valve 202, a shuttle valve 203, and a pilot operated directional control valve 204. The fast feed multiplex valve 201 is preferably of the "0" type in neutral position, and the slow feed multiplex valve 202 is preferably of the "Y" type in neutral position. The fast feed multiplex valve 201A, B is connected with A, B of the shuttle valve 203, and the C port of the shuttle valve 203 is connected with the pilot control port X of the pilot control change-over valve 204. The ports of the slow feed multiplex valve 202A, B are connected with ports of pilot operated directional control valves 204A 'and B'.
When the fast feeding multi-way valve 201 acts, the pressure oil controls the hydraulic control reversing valve 204 to work at an upper position through the shuttle valve 203, and the slow feeding multi-way valve 202A, B is cut off. The rapid feeding multi-way valve 201 controls the pulling oil cylinder 9 to realize rapid feeding and pulling; when the fast feeding multi-way valve 201 is located at the middle position, the hydraulic control reversing valve 204 works at the lower position, the port of the slow feeding multi-way valve 202A, B is operated to be communicated with the port of the lift cylinder 9A, B, the middle position of the fast feeding multi-way valve 201 is O-shaped, the middle position is cut off, the slow feeding multi-way valve 202 controls the lift cylinder 9 at the moment, and the slow feeding multi-way valve 202 supplies oil for a small displacement pump, so that slow feeding lift can be realized.
By arranging the fast and slow feeding and pulling logic circuit 2, an operator independently operates the fast feeding multi-way valve 201 and the slow feeding multi-way valve 202, and the hydraulic system automatically realizes function conversion, thereby simplifying the operation of the drilling machine.
Referring to fig. 3, the hydraulic schematic diagram of the normally closed type clamp logic circuit of the normally open type chuck of fig. 3 includes a tripping logic control circuit 301 and a slewing logic control circuit 302.
The trip logic circuit 301 includes a trip function switching multi-way valve 301a, a pilot operated multi-way valve 301b, a check valve 301c, and a pilot operated check valve 301 d.
The A, B port of the multi-way valve for switching the drilling function 301a and the drilling function is connected with the A, B port of the pulling cylinder, A 'and B' are connected with the ports of the hydraulic control multi-way valve a and B, the multi-way valve for switching the drilling function 301a and the switching of the drilling or the drilling function are realized, and the working states of the normally open chuck 7 and the normally closed clamp 8 are automatically controlled through acquiring the pressure of the 9A, B port of the pulling cylinder of the drilling machine, the hydraulic control multi-way valve 301B, the one-way valve 301c and the hydraulic control one-way valve 301 d.
The working oil of the normally open chuck 7 and the normally closed clamper 8 is taken from the sub-pump 102, and the pressure thereof is controlled by the pressure control circuit 5.
The multi-way valve 301a for switching the function of tripping is provided with a tripping logic, when the multi-way valve 201 or the multi-way valve 202 for slow feeding is operated to a feeding position, the pilot port a of the hydraulic control multi-way valve 301b is high-pressure, the hydraulic control multi-way valve 301b works in an upper position, high-pressure oil is supplied to the normally open chuck 7 through the hydraulic control multi-way valve 301b, the check valve 301c is automatically clamped by the normally open chuck 7, the high-pressure oil is supplied to the normally closed clamp 8 through the normally closed clamp control hydraulic control valve 302d and the stop valve 302c, and the normally closed clamp 8 is automatically released. When the fast feeding multi-way valve 201 or the slow feeding multi-way valve 202 is operated to the pulling position, the pilot port b of the pilot control multi-way valve 301b is high pressure, the pilot control multi-way valve 301b works in the lower position, high-pressure oil flows through the pilot control multi-way valve 301b to open the pilot control one-way valve 301d, the normally open chuck 7 controls the oil to return to the oil tank, the normally closed clamp 8 stop valve 302c and the normally closed clamp control pilot control valve 302d are connected with the oil tank, and the normally closed clamp 8 automatically clamps. The tripping function converts the lower position of the multi-way valve 301a into tripping logic, the principle is opposite to the tripping logic, when the fast feeding multi-way valve 201 or the slow feeding multi-way valve 202 is operated to carry, the normally open chuck 7 is automatically released, and the normally closed gripper 8 is automatically clamped. When the fast feeding multi-way valve 201 or the slow feeding multi-way valve 202 is operated to the pulling position, the normally open chuck 7 is clamped, and the normally closed clamp 8 is released.
The rotary logic control loop 302 includes a shuttle valve 302a, a normally open chuck pilot operated valve 302b, a shutoff valve 302c, and a normally closed clamp pilot operated valve 302 d.
The shuttle valve 302a acquires the state of the rotary motor 6, the motor 6 rotates, the shuttle valve 302a acquires high-pressure oil of the motor 6, the normally open type chuck control hydraulic control valve 302b is controlled to work at the upper position, and the high-pressure oil controls the normally open type disk 7 to clamp through the normally open type chuck control hydraulic control valve 302; the shuttle valve 302a obtains the high-pressure oil of the motor 6 to control the normally closed type clamp control hydraulic control valve 302d to work at the lower position, the high-pressure oil flow normally closes the clamp control hydraulic control valve 302d, and the stop valve 302c controls the normally closed type clamp 8 to open. Through logic control of the normally open chuck 7 and the normally closed clamp holder 8, the rotary motor 6 rotates forwards and the normally open chuck 7 clamps and the normally closed clamp holder 8 releases drilling. The stop valve 302c is cut off before the rotary motor 6 rotates, the normally open type chuck 7 clamps, the normally closed type holder 8 is in a clamping state because the stop valve 302c is cut off, the rotary motor 6 is fastened in a forward rotation mode, the normally open type chuck clamps when the rotary motor 6 rotates in a reverse rotation mode, and the normally closed type holder 8 clamps and unloads.
Normally open chuck normally closed holder logic circuit 3 can realize normally open chuck 7 and 8 logic control of normally closed holder, and in the process of getting up and going down the drilling or normally creep into the drilling in-process, rig operating personnel only need operate swing motor 6 or pull up and pull out the hydro-cylinder 9 action, because normally open chuck 7 and 8 working oil sources of normally closed holder are taken from the auxiliary pump, consequently need not be in the feed and pull up and pull out return circuit backpressure, and normally open chuck and normally closed holder press from both sides tightly reliably.
Referring to fig. 4, fig. 4 is a schematic diagram of a power head locking logic circuit 4 hydraulic system, which includes shuttle valves 401, 402, a throttle valve 403, and pilot operated check valves 404, 405.
The port B of the shuttle valve 401 is connected with the port 302aC of the shuttle valve, the port A of the shuttle valve 401 is connected with the port 402C of the shuttle valve, the port 402A, B of the shuttle valve is respectively connected with the ports 404 and 405A of the check valve, the port 401C of the shuttle valve is connected with the ports 404 and 405C of the hydraulic control check valve, and the ports 404 and 405B of the hydraulic control check valve are connected with the port 9A, B of the pull-up oil cylinder 9.
The shuttle valve 302a acquires the state of the rotary motor 6, the shuttle valve 402 acquires the state of the pull-up cylinder 9, a logic control network is formed by the shuttle valves 302a, 401 and 402 to control the opening and closing of the hydraulic check valves 404 and 405, when the rotary motor 6 rotates or the fast feed multi-way valve 201 or the slow feed multi-way valve 202 operates, the hydraulic control check valves 404 and 405 are opened, otherwise, the hydraulic control check valves 404 and 405 lock the pull-up cylinder 9. The throttle valve 403 enables reduced pressure drilling.
The power head locking logic circuit 4 forms pulling oil cylinder opening and locking logic control through the shuttle valve network and the hydraulic control one-way valve, when the main execution mechanism of the drilling machine does not act, the pulling oil cylinder is locked, and the phenomenon that a feeding system slides under the action of self weight to cause personnel or equipment damage can be avoided. Meanwhile, when the drilling tool is unscrewed, the pulling oil cylinder 9 is automatically in a floating state, so that the operation of the drilling machine is simplified, and meanwhile, the protection of screw threads in the process of unscrewing the drilling tool is facilitated.
In practical application, only the action of the main executing mechanism needs to be controlled, and the action of the auxiliary mechanism is realized through logic control. The labor intensity of drilling machine operators is low, and the drilling machine efficiency is high. The working pressure of the auxiliary mechanism of the drilling machine is taken from a high-pressure oil source, the logic control loop can realize the reliable action of the auxiliary mechanism only by needing smaller working pressure of the actuating mechanism, larger system backpressure is not needed, the pressure loss of the system is small, and the efficiency is high.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (7)
1. A drilling rig hydraulic logic control system, comprising:
a pump station (1) having a large-displacement main pump (101) and a small-displacement sub-pump (102);
a fast and slow pulling logic loop (2) for controlling the pulling speed of the pulling oil cylinder (9);
power head locking logic loop (4) for controlling locking and floating conversion of pulling oil cylinder (9)
The fast and slow pulling logic circuit (2) comprises a fast feeding multi-way valve (201), a slow feeding multi-way valve (202), a shuttle valve and a hydraulic control reversing valve (204); an A, B port of the quick feeding multi-way valve (201) is connected with a A, B port of a shuttle valve, and a C port of the shuttle valve is connected with a hydraulic control port X of a hydraulic control reversing valve (204); the A, B port of the slow feeding multi-way valve (202) is connected with the A 'and B' ports of the hydraulic control reversing valve (204); the fast feeding multi-way valve (201) A, B is connected with the slow feeding multi-way valve (202) A, B and then connected with the pulling oil cylinder (9) A, B;
wherein, the power head locking logic circuit (4) further comprises: shuttle valves, pilot operated check valves (404, 405); the shuttle valve acquires the states of the pulling cylinder (9) and the rotary motor (6), and when high-pressure oil flows into the pulling cylinder (9) or the rotary motor (6), the high-pressure oil controls the hydraulic control one-way valves (404, 405) to be opened; when the lifting oil cylinder (9) or the rotary motor (6) does not work, the hydraulic control one-way valves (404, 405) lock the oil cylinder.
2. The drilling rig hydraulic logic control system of claim 1, further comprising: a normally open chuck normally closed type clamper logic loop (3) for controlling the work state conversion of the drilling machine part; the normally open chuck normally closed gripper logic circuit (3) further comprises: a tripping logic control loop (301) and a slewing logic control loop (302);
the trip-out logic control circuit (301) acquires the state of the fast feed multi-way valve (201) through a shuttle valve, controls the hydraulic control reversing valve (204) to stop the slow feed multi-way valve (202) when the fast feed multi-way valve (201) works, and is communicated with the loop of the trip-out oil cylinder (9) through the slow feed multi-way valve (202) when the fast feed multi-way valve (201) does not work;
wherein gyration logic control circuit (302) obtain the unit head state through the shuttle valve, and when the unit head rotated, the switching-over was controlled through normally open chuck control hydraulic control valve (302b) and normally closed holder control hydraulic control valve (302d) to the normally open chuck (7) of control and the opening and shutting of normally closed holder (8) to high-pressure oil.
3. The drilling rig hydraulic logic control system of claim 1, further comprising: a pressure control circuit (5) for effecting pressure regulation; the oil source of the pressure control circuit (5) is taken from a small-displacement auxiliary pump (102), wherein the pressure control circuit (5) comprises two manual pressure reducing valves, one manual pressure reducing valve controls slow feeding pressure, and the other manual pressure reducing valve controls clamping force of a normally-open chuck (7).
4. The control method of the hydraulic logic control system of the drilling machine according to claim 1, characterized by comprising the following steps: when the fast feeding multi-way valve (201) acts, the pressure oil controls the hydraulic control reversing valve (204) to work at an upper position through the shuttle valve, and the A, B port of the slow feeding multi-way valve (202) is cut off; the rapid feeding multi-way valve (201) controls the pulling oil cylinder (9) to realize rapid feeding and pulling; when the fast feeding multi-way valve (201) is located at the middle position, the hydraulic control reversing valve (204) works at the lower position, the port A, B of the slow feeding multi-way valve (202) is operated to be cut off and communicated, and the slow feeding multi-way valve (202) controls the pulling oil cylinder (9) to realize slow feeding pulling.
5. The control method according to claim 4, characterized by comprising:
the upper position of the multi-way valve (301a) is converted into a drilling logic by a drilling-up and drilling-down function, when the fast feeding multi-way valve (201) or the slow feeding multi-way valve (202) is operated to carry, the normally open chuck (7) is automatically clamped, and the normally closed clamp holder (8) is automatically released; when the fast feeding multi-way valve (201) or the slow feeding multi-way valve (202) is operated to a feeding and pulling position, the normally open chuck (7) is loosened, and the normally closed clamp (8) is clamped;
the tripping function converts the lower position of the multi-way valve (301a) into tripping logic, when the fast feeding multi-way valve (201) or the slow feeding multi-way valve (202) is operated to carry, the normally open chuck (7) is automatically released, and the normally closed gripper (8) is automatically clamped; when the fast feeding multi-way valve (201) or the slow feeding multi-way valve (202) is operated to a feeding and pulling position, the normally open chuck (7) is clamped, and the normally closed clamp (8) is released.
6. The control method according to claim 4, characterized by comprising: in a rotary logic control loop (302), the shuttle valve acquires the state of a rotary motor (6), and logically controls a normally open chuck (7) and a normally closed clamp holder (8), wherein the rotary motor (6) rotates forwards and the normally open chuck (7) clamps and the normally closed clamp holder (8) loosens and drills; a rotary motor (6) rotates forwards and a normally open chuck (7) clamps, a stop valve (302c) is stopped, and a normally closed clamp holder (8) clamps and tightly buckles; the rotary motor (6) reversely rotates to clamp the normally open chuck and the normally closed clamp holder (8) clamps the shackle.
7. The control method according to claim 4, characterized in that in the power head locking logic circuit (4), the shuttle valve acquires the state of the rotary motor (6), the shuttle valve (402) acquires the state of the pull-up cylinder (9), a logic control network is formed by the shuttle valves, the opening and closing of the hydraulic control one-way valves (404, 405) are controlled, when the rotary motor (6) rotates or the fast feed multi-way valve (201) or the slow feed multi-way valve (202) operates, the hydraulic control one-way valves (404, 405) are opened, otherwise, the hydraulic control one-way valves (404, 405) lock the pull-up cylinder (9), and the throttle valve (403) realizes the pressure reduction drilling.
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| CN111350459B (en) * | 2020-03-12 | 2021-07-27 | 中煤科工集团西安研究院有限公司 | Double-diesel-engine power vehicle-mounted drilling machine and control method thereof |
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