CN113879995A - Main winch variable load lowering control method and rotary drilling rig - Google Patents
Main winch variable load lowering control method and rotary drilling rig Download PDFInfo
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- CN113879995A CN113879995A CN202111075762.4A CN202111075762A CN113879995A CN 113879995 A CN113879995 A CN 113879995A CN 202111075762 A CN202111075762 A CN 202111075762A CN 113879995 A CN113879995 A CN 113879995A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/54—Safety gear
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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
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
- E21B3/022—Top drives
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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
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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
- 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
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- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a main winch variable load lowering control method and a rotary drilling rig, wherein in the lowering process of a main winch (5), the loading current of a loading unit (8) is changed before each section of an inner section of a drill rod (6) extends out, and the torque applied to a transfer case (2) by the loading unit (8) is controlled in a smooth transition mode by changing the loading current in advance so as to balance the negative load with step change and enable the lowering process to be more stable. The loading unit is used for solving the problems of poor descending stability and large speed fluctuation caused by the stepped change of the weight of the drill rod when the main coil of the rotary drilling rig is descended, and meanwhile, when the weight of the drill rod is large, the loading unit is used for applying a certain torque to the transfer case to prevent the engine from being dragged reversely to overspeed.
Description
Technical Field
The invention relates to a variable load lowering control method of a main winch and a rotary drilling rig, and belongs to the technical field of engineering machinery.
Background
The rotary drilling rig is piling machinery for pore-forming operation, and a main hoisting motor is utilized to drive a speed reducer and a winding drum to rotate so as to realize lifting and lowering of a drill rod. In a hoisting volume speed regulating system consisting of a closed pump and a motor, when a main hoisting motor rotates in a no-load mode, the closed pump drives the motor to rotate. However, when the main hoisting steel wire rope hangs a heavy object, the motor can generate a load in the lowering process, the motor is converted into a pump working condition at the moment, the closed pump is converted into a motor working condition, the power source is dragged reversely, when the load reaches a certain degree, the power source can be dragged reversely to overspeed, and certain measures are required to prevent overspeed.
For the rotary drilling rig, the drill rod is of a telescopic multi-section rod structure, and the weight of the drill rod is the sum of the weight of each section of rod: g1+ G2 + … + Gn. Along with transferring of main hoist, outer festival pole falls on the power head in stage and is held by the power head, and the load size of main hoist is the state of step change, does in proper order: g1+ G2 + … + Gn, G1+ G2 + … + Gn-1, …, G1. In order to prevent the problem that the stepped and sudden load causes unstable descending of the closed type hoisting system, a proper control method is required. In the prior art, CN102515049B only proposes to reduce the lowering speed of a main winch when an inner section of drill rod is about to extend out, and does not propose a practical and effective method for reducing the lowering speed of the main winch; patent CN202415060U solves this problem by controlling the opening of the main valve and further controlling the rotation speed of the main winding motor. However, the above prior art is implemented on the basis of an open type main hoisting hydraulic system.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a control method for lowering a variable load of a main winch and a rotary drilling rig, which are used for solving the problems of poor lowering stability and large speed fluctuation caused by the step change of the weight of a drill rod when a main coil of the rotary drilling rig is lowered.
In order to achieve the purpose, the invention provides a main winch variable load lowering control method, which comprises the following steps:
in the process of lowering the main winch, according to the current weight of the drill rod, the loading current of the loading unit is correspondingly changed before the inner section of each section of the drill rod extends out, and the loading unit applies corresponding torque to the transfer case to prevent the engine from being dragged reversely and overspeeding.
Preferably, the loading current of the loading unit is changed Δ t ms in advance before the inner section of the drill pipe is extended and lowered, and the loading unit applies corresponding torque to the transfer case.
Preferably, the controller sends a lowering command to the closed pump, and the closed pump changes to a specified displacement so as to execute a lowering action;
according to the collected signals of the weighing sensor, the controller obtains the current weight of the drill rod;
according to the collected depth measurement sensor signal and the power head position signal, the controller judges whether the engine has back-dragging overspeed or not, if the actual rotating speed of the engine is greater than the target throttle rotating speed, the engine has back-dragging overspeed, otherwise, the engine does not have back-dragging overspeed;
when the engine is in anti-dragging overspeed, the controller sends a preset loading current value matched with the current weight of the drill rod to the loading unit, and the loading unit applies corresponding torque to the transfer case for gradually weakening until the engine is prevented from anti-dragging overspeed.
A rotary drilling rig is used for executing the control method and comprises an engine, a transfer case, a closed pump, a main hoisting motor, a main hoisting, a drill rod, a power head, a loading unit, a weighing sensor, a depth measuring sensor, a rope and a hoisting wheel.
Preferentially, the loading unit comprises an electric control variable pump, a first hydraulic control reversing valve, an overflow valve and a pilot electromagnetic valve, the electric control variable pump is connected with the second output shaft of the transfer case, an A port of the electric control variable pump is communicated with a P port of the first hydraulic control reversing valve, a T port of the first hydraulic control reversing valve is connected with the oil tank, the A port of the first hydraulic control reversing valve is connected with the A port of the overflow valve, an a port of the first hydraulic control reversing valve is connected with a J port of the pilot electromagnetic valve, the T port of the overflow valve is connected with the oil tank, and an M port of the pilot electromagnetic valve is connected with the oil tank.
Preferably, the first hydraulic control reversing valve is a three-position four-way hydraulic control valve, and the pilot electromagnetic valve is a two-position three-way electromagnetic valve.
Preferably, the loading unit comprises an oil pump, a hydraulic control reversing valve II, an electric proportional overflow valve and a pilot electromagnetic valve,
the oil pump output shaft is connected with the second output shaft of the transfer case, the port A of the oil pump is communicated with the port P of the second hydraulic control reversing valve, the port T of the second hydraulic control reversing valve is communicated with the oil tank, the port A of the second hydraulic control reversing valve is connected with the port A of the electric proportional overflow valve, the port a of the second hydraulic control reversing valve is communicated with the port J of the pilot electromagnetic valve, the port M of the pilot electromagnetic valve is connected with the oil tank, and the port T of the electric proportional overflow valve is connected with the oil tank.
Preferably, the second hydraulic control reversing valve is a three-position four-way hydraulic control valve, and the pilot electromagnetic valve is a two-position three-way electromagnetic valve.
The invention achieves the following beneficial effects:
according to the invention, the loading current of the loading unit is changed before the inner section of the drill rod extends out and is lowered, and the torque applied to the transfer case by the loading unit is controlled in a smooth transition mode by changing the loading current in advance so as to balance the sudden-change negative load of step change and make the lowering process more stable; when the weight of the drill rod is large, the loading unit is used for applying certain torque to the transfer case to prevent the engine from being dragged backwards to overspeed.
Drawings
FIG. 1 is a schematic diagram of the principles of the present invention;
FIG. 2 is a schematic view of the main winch of the present invention being lowered to another stage;
FIG. 3 is a diagram of a loading unit according to an embodiment of the present invention;
FIG. 4 is a diagram of a loading unit according to a second embodiment of the present invention;
FIG. 5 is a schematic illustration of the variation of the main hoisting load of the present invention;
FIG. 6 is a flow chart of the control logic of the present invention;
in the figure: 1. the device comprises an engine, 2, a transfer case, 3, a closed pump, 4, a main winch motor, 5, a main winch, 6, a drill rod, 7, a power head, 8, a loading unit, 9, a weighing sensor, 10, a depth measuring sensor, 11, a controller, 3-1, an electric control variable pump, 3-2, a first hydraulic control reversing valve, 3-3, an overflow valve, 3-4, a pilot electromagnetic valve, 4-1, an oil pump, 4-2, a second hydraulic control reversing valve, 4-3, an electric proportional overflow valve, 4-4 and a pilot electromagnetic valve.
Detailed Description
The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example one
A main winch variable load lowering control method comprises the following steps:
in the process of lowering the main winch, according to the current weight of the drill rod, the loading current of the loading unit is correspondingly changed before the inner section of each section of the drill rod extends out, and the loading unit applies corresponding torque to the transfer case to prevent the engine from being dragged reversely and overspeeding.
Preferably, the loading current of the loading unit is changed Δ t ms in advance before the inner section of the drill pipe is extended and lowered, and the loading unit applies corresponding torque to the transfer case.
Preferably, the controller sends a lowering command to the closed pump, and the closed pump changes to a specified displacement so as to execute a lowering action;
according to the collected signals of the weighing sensor, the controller obtains the current weight of the drill rod;
according to the collected depth measurement sensor signal and the power head position signal, the controller judges whether the engine has back-dragging overspeed or not, if the actual rotating speed of the engine is greater than the target throttle rotating speed, the engine has back-dragging overspeed, otherwise, the engine does not have back-dragging overspeed;
when the engine is in anti-dragging overspeed, the controller sends a preset loading current value matched with the current weight of the drill rod to the loading unit, and the loading unit applies corresponding torque to the transfer case for gradually weakening until the engine is prevented from anti-dragging overspeed.
A rotary drilling rig is used for executing the control method and comprises an engine 1, a transfer case 2, a closed pump 3, a main hoisting motor 4, a main hoisting 5, a drill rod 6, a power head 7, a loading unit 8, a weighing sensor 9, a depth measuring sensor 10, a rope and a hoisting wheel, wherein the engine 1 is connected with the transfer case 2, the closed pump 3 is connected with a first output shaft of the transfer case 2, an oil port of the main hoisting motor 4 is communicated with an oil port of the closed pump 3, the main hoisting 5 is linked with the main hoisting motor 4, the rope is wound on the main hoisting 5, the rope bypasses the hoisting wheel to be fixedly connected with the drill rod 6, the hoisting wheel is fixedly arranged above the drill rod 6, the power head 7 is installed on the drill rod 6, a second output shaft of the transfer case 2 is connected with the loading unit 8, and the weighing sensor 9 and the depth measuring sensor 10 are both installed on the hoisting wheel.
Further, in the embodiment, the loading unit 8 comprises an electronic control variable pump 3-1, a first hydraulic control change-over valve 3-2, an overflow valve 3-3 and a pilot electromagnetic valve 3-4, the electronic control variable pump 3-1 is connected with the second output shaft of the transfer case 2, an A port of the electronic control variable pump 3-1 is communicated with a P port of the first hydraulic control change-over valve 3-2, a T port of the first hydraulic control change-over valve 3-2 is connected with an oil tank, an A port of the first hydraulic control change-over valve 3-2 is connected with an A port of the overflow valve 3-3, an a port of the first hydraulic control change-over valve 3-2 is connected with a J port of the pilot electromagnetic valve 3-4, a T port of the overflow valve 3-3 is connected with the oil tank, and an M port of the pilot electromagnetic valve 3-4 is connected with the oil tank.
Further, in this embodiment, the first pilot operated directional control valve 3-2 is a three-position four-way pilot operated valve, and the pilot operated solenoid valve 3-4 is a two-position three-way solenoid valve.
The invention comprises the following hardware:
the weighing sensor 9 is used for detecting the actual weight of the drill rod 6 suspended by the steel wire rope of the main winch 5 in real time;
the depth measurement sensor 10 is used for detecting the actual depth and speed of the downward placement of the drill rod 6 in real time;
the power head position detection device 12 is used for detecting the actual position of the power head 7 in real time;
and the controller 11 is used for receiving signals of the weighing sensor 9, signals of the depth measuring sensor 10 and CAN bus signals of the engine 1 in real time, and simultaneously sending a main winch lowering instruction to the closed pump 3 and a loading instruction to the loading unit 8.
The open pump is connected with the second output shaft of the transfer case and used for applying torque to the transfer case so as to balance the weight of the drill rod;
and the overflow valve is connected in the output pipeline of the open pump and used for providing pressure for the open pump.
In the process of lowering the main winch 5, the main winch motor 4 is converted into a pump working condition, and the closed pump 3 is converted into a motor working condition, so that the energy lowered by the drill rod 6 is transmitted to the transfer case 2, and the engine 1 is driven to rotate reversely;
when the weight of the drill rod 6 is large, the loading unit 8 is used for applying certain torque to the transfer case 2 to prevent the engine 1 from being dragged backwards to overspeed;
when the outer section of the drill rod 6 is dropped on the power head 7 and the inner section of the drill rod extends out and continues to be lowered, the weight is changed in a step mode, and different weights are balanced by changing the torque applied to the transfer case 2 by the loading unit 8;
when the depth measurement sensor 10 detects that the outer section of the drill rod 6 falls on the power head 7, the loading value of the loading unit 8 is changed 100ms in advance, and unstable lowering speed caused by sudden weight change due to the fact that the inner section of the drill rod stretches out and continues to be lowered is avoided.
The method further comprises the steps of:
step one, the controller 11 sends a lowering instruction to the closed type pump 3, and the closed type pump 3 changes the displacement specified by the controller 11 according to the instruction so as to execute the lowering action;
and step two, the controller 11 obtains the current weight of the drill rod 6 according to the received signals of the weighing sensor 9, the depth sensor 10 and the power head position detection device 12. When the depth H of the drill rod, the ground clearance height H of the power head and the length L of each section of drill rod 6 meet the condition that H + H is more than 0 and less than or equal to L, the current weight of the drill rod is G1+ G2 + … + Gn, and n is the total number of sections of the drill rod; and when the L is more than H + H and less than or equal to 2L, the weight of the current drill rod is G1+ G2 + … + Gn-1, …, and so on until the inner sections of the drill rod are all extended out. When H + H is close to the maximum upper limit value of any stage, the H + H indicates that a certain section of the drill rod 6 is about to extend out;
thirdly, the actual rotating speed of the engine is sent by the CAN bus of the engine, and the controller 11 compares the target rotating speed with the actual rotating speed of the engine so as to judge whether the engine is in reverse dragging overspeed or not; if the actual rotating speed of the engine is greater than the target rotating speed, the engine is overspeed, otherwise, the engine is not overspeed;
step four, when the engine is over-speed due to back-dragging, the controller 11 adjusts the loading current of the loading unit 8 in real time, so as to adjust the torque of the transfer case 2, and gradually weaken the torque until the engine is prevented from over-speed due to back-dragging;
step five, when the inner section of the drill rod 6 is about to extend out, the loading current of the loading unit 8 is increased by 100ms in advance, so that the drill rod slowly falls on the power head to reduce impact; the loading current of the loading unit gradually decreases, and the loading current is transited to the next stage in a slope change mode with unchanged slope so as to balance the sudden negative load of step change and make the lowering process more stable;
step six, when the inner section of the drill rod 6 extends out, the controller 11 adjusts the loading value of the loading unit 8 100ms in advance, the signal of the weighing sensor 9 changes, the loading value of the loading unit 9 is transited to a preset loading value corresponding to the current drill rod weight in a curve form with fixed slope and descending slope, and the preset loading value is matched with the current drill rod weight, so that the lowering process is more stable.
Fig. 3 is a schematic diagram of an embodiment of the loading unit of the present invention, where the loading unit includes:
the electric control variable pump 3-1 is connected with a second output shaft of the transfer case 2 and is used for applying torque to the transfer case 2 so as to balance the weight of the drill rod 6; a P port of the hydraulic control reversing valve 3-2 is connected with an A port of the electric control variable pump 3-1, the A port of the hydraulic control reversing valve 3-2 is connected with an A port of the overflow valve 3-3, and a T port of the hydraulic control reversing valve 3-2 and a T port of the overflow valve 3-3 are both connected to a hydraulic oil tank;
an oil inlet of the pilot electromagnetic valve 3-4 is connected with the hydraulic oil tank, and an oil outlet of the pilot electromagnetic valve 3-4 is connected with an a port of the hydraulic control reversing valve 3-2 and used for reversing of the hydraulic control reversing valve.
When the loading unit receives a loading instruction, the pilot electromagnetic valve 3-4 is electrified, and the hydraulic control reversing valve 3-2 realizes reversing; meanwhile, the electric control variable pump 3-1 realizes different flow output according to the loading electric signal, the output pressure oil flows through the P port of the hydraulic control reversing valve 3-2, the A port of the hydraulic control reversing valve 3-2 and the overflow valve 3-3 in sequence and returns to the oil tank, and the torque acting on the second output shaft of the transfer case 2 at the moment is as follows:
wherein, in the step (A),pto electrically control the outlet pressure of the variable displacement pump 3-1,ηto control the overall transmission efficiency of the variable displacement pump 3-1 and the transfer case,Vgthe displacement of the electric control variable pump 3-1 is in one-to-one correspondence with the loading current signal, namely.
The electric control variable pump 3-1 comprises a two-position three-way hydraulic control valve, a two-position three-way electromagnetic valve Y1, a horizontal bar valve and a variable mechanism 7, when no electric signal is input, the Y1 electromagnetic valve works at the right position, pressure oil from the outlet of the left electric control variable pump 3-1 sequentially passes through the oil port 1, the oil port 2, the oil port 3, the oil port 5 and the oil port 6 in the figure 3 to act on the variable mechanism 7, a variable piston of the variable mechanism 7 moves leftwards, and the electric control variable pump 3-1 is pushed to the minimum displacement; when an electric signal is input into the Y1 electromagnetic valve, the Y1 electromagnetic valve is reversed to the left position, pressure oil acting on the variable mechanism 7 flows back to the oil tank through the oil port 6, the oil port 5, the oil port 3 and the oil port 4 in sequence, the variable piston of the variable mechanism 7 moves rightwards, and the electrically controlled variable pump 3-1 is pushed to a large displacement;
the controller 11 sends the loading current signal I to the electromagnetic valve Y1 for loading, when the inner section of the drill rod 6 is about to extend, the loading current signal I is increased by 100ms in advance, so that the discharge capacity of the electric control variable pump 3-1 is increased, the torque of the transfer case 2 is increased, the drill rod 6 slowly falls on the power head to reduce impact, and the loading current signal I is transited to the next stage in a curve form that the slope is fixed and the slope is reduced when the inner section of the drill rod 6 begins to extend, so that the lowering process is more stable.
The hydraulic control system comprises an oil tank, an engine 1, a transfer case 2, a closed pump 3, a main winch motor 4, a main winch 5, a drill rod 6, a power head 7, a loading unit 8, a weighing sensor 9, a depth measuring sensor 10, a rope, a hanging wheel, an electric control variable pump 3-1, a hydraulic control reversing valve 3-2, an overflow valve 3-3 and a pilot electromagnetic valve 3-4.
Example two
Different from the first embodiment, in the present embodiment, as shown in fig. 4, the loading unit includes:
the oil pump 4-1 is connected with the second output shaft of the transfer case and used for applying torque to the transfer case so as to balance the weight of the drill rod;
a P port of the hydraulic control reversing valve 4-2 is connected with an A port of the pump 4-1, the A port of the hydraulic control reversing valve 4-2 is connected with an A port of the electric proportional overflow valve 4-3, and a T port of the hydraulic control reversing valve 4-2 and a T port of the electric proportional overflow valve 4-3 are both connected to a hydraulic oil tank;
an oil inlet of the pilot electromagnetic valve 4-4 is connected with an oil source, and an oil outlet of the pilot electromagnetic valve is connected with an a port of the hydraulic control reversing valve 4-2 and used for reversing of the hydraulic control reversing valve.
When the loading unit receives a loading instruction, the pilot electromagnetic valve 4-4 is electrified, and the hydraulic control reversing valve 4-2 realizes reversing; meanwhile, the electric proportional overflow valve 4-3 realizes different overflow pressures according to different loading current signals, and the pressure oil output by the pump 4-1 sequentially flows through the hydraulic control reversingThe port P and the port A of the valve 4-2 and the electric proportional overflow valve 4-3 are used, and the torque acting on the second output shaft of the transfer case at the moment is as follows:
vg is the displacement of the pump 4-1, eta is the total transmission efficiency of the pump 4-1 and the transfer case 2, p is the overflow pressure of the electric proportional overflow valve 4-3, and p and the loading current signal form a one-to-one corresponding relation, namely.
The controller 11 sends the loading current signal I to the electric proportional overflow valve 4-3 for loading, when the inner section of the drill rod 6 is about to extend out, the loading current signal I is increased by delta t ms in advance so that the drill rod slowly falls on the power head to reduce impact, and when the inner section of the drill rod 6 begins to extend out, the loading current signal I is transited to the next stage in a curve form with a fixed slope and a descending slope, so that the lowering process is more stable.
The hydraulic control reversing valve II 4-2 is a three-position four-way hydraulic control valve, the pilot electromagnetic valve 4-4 is a two-position three-way electromagnetic valve, and the oil pump 4-1, the hydraulic control reversing valve II 4-2, the electric proportional overflow valve 4-3 and the pilot electromagnetic valve 4-4 are of various types which can be adopted in the prior art, and a person skilled in the art can select a proper type according to actual requirements, and the embodiment is not illustrated one by one.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A main winch variable load lowering control method is characterized by comprising the following steps:
during the lowering process of the main winch (5), according to the current weight of the drill rod (6), the loading current of the loading unit (8) is changed correspondingly before the inner section of each section of the drill rod (6) extends, and the loading unit (8) applies corresponding torque to the transfer case (2) to prevent the engine (1) from being dragged reversely and overspeeding.
2. A main hoist variable load lowering control method according to claim 1, characterized in that the loading current of the loading unit (8) is changed by Δ t ms before the extension and lowering of the inner joint of the drill pipe (6), and the loading unit (8) applies a corresponding torque to the transfer case (2).
3. The main winch variable load lowering control method according to claim 2, comprising:
the controller sends a lowering instruction to the closed type pump (3), and the closed type pump (3) changes to a specified displacement so as to execute a lowering action;
according to the collected signals of the weighing sensor, the controller obtains the current weight of the drill rod (6);
according to the collected depth measurement sensor signal and the power head position signal, the controller judges whether the engine (1) has the back-dragging overspeed or not, if the actual rotating speed of the engine is greater than the target throttle rotating speed, the engine (1) has the back-dragging overspeed, otherwise, the engine (1) does not have the back-dragging overspeed;
when the engine (1) is in anti-dragging overspeed, the controller sends a preset loading current value matched with the current weight of the drill rod (6) to the loading unit (8), and the loading unit (8) applies corresponding torque to the transfer case (2) for gradually weakening until the engine (1) is prevented from anti-dragging overspeed.
4. A rotary drilling rig is characterized by comprising an engine (1), a transfer case (2), a closed pump (3), a main hoisting motor (4), a main hoisting (5), a drill rod (6), a power head (7), a loading unit (8), a weighing sensor (9), a depth measuring sensor (10), a rope and a hoisting wheel, wherein the engine (1) is connected with the transfer case (2), the closed pump (3) is connected with a first output shaft of the transfer case (2), an oil port of the main hoisting motor (4) is communicated with an oil port of the closed pump (3), the main hoisting (5) is linked with the main hoisting motor (4), the rope is wound on the main hoisting (5), the rope bypasses the hoisting wheel and is fixedly connected with the drill rod (6), the hoisting wheel is fixedly arranged above the drill rod (6), the power head (7) is installed on the drill rod (6), a second output shaft of the transfer case (2) is connected with the loading unit (8), the weighing sensor (9) and the depth sensor (10) are both arranged on the hanging wheel.
5. The rotary drilling rig according to claim 4,
the loading unit (8) comprises an electric control variable pump (3-1), a first hydraulic control reversing valve (3-2), an overflow valve (3-3) and a pilot electromagnetic valve (3-4), the electric control variable pump (3-1) is connected with a second output shaft of the transfer case (2), an A port of the electric control variable pump (3-1) is communicated with a P port of the first hydraulic control reversing valve (3-2), a T port of the first hydraulic control reversing valve (3-2) is connected with the oil tank, an A port of the first hydraulic control reversing valve (3-2) is connected with an A port of the overflow valve (3-3), an a port of the first hydraulic control reversing valve (3-2) is connected with a J port of the pilot electromagnetic valve (3-4), a T port of the overflow valve (3-3) is connected with the oil tank, and an M port of the pilot electromagnetic valve (3-4) is connected with the oil tank.
6. The rotary drilling rig according to claim 5,
the first hydraulic control reversing valve (3-2) is a three-position four-way hydraulic control valve, and the pilot electromagnetic valve (3-4) is a two-position three-way electromagnetic valve.
7. The rotary drilling rig according to claim 4,
the loading unit (8) comprises an oil pump (4-1), a hydraulic control reversing valve II (4-2), an electric proportional overflow valve (4-3) and a pilot electromagnetic valve (4-4),
an output shaft of the oil pump (4-1) is connected with a second output shaft of the transfer case (2), an A port of the oil pump (4-1) is communicated with a P port of a second hydraulic control reversing valve (4-2), a T port of the second hydraulic control reversing valve (4-2) is communicated with an oil tank, the A port of the second hydraulic control reversing valve (4-2) is connected with an A port of an electric proportional overflow valve (4-3), an a port of the second hydraulic control reversing valve (4-2) is communicated with a J port of a pilot electromagnetic valve (4-4), an M port of the pilot electromagnetic valve (4-4) is connected with the oil tank, and the T port of the electric proportional overflow valve (4-3) is connected with the oil tank.
8. The rotary drilling rig according to claim 7,
the second hydraulic control reversing valve (4-2) is a three-position four-way hydraulic control valve, and the pilot electromagnetic valve (4-4) is a two-position three-way electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111075762.4A CN113879995A (en) | 2021-09-14 | 2021-09-14 | Main winch variable load lowering control method and rotary drilling rig |
Applications Claiming Priority (1)
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| CN114314401A (en) * | 2022-03-07 | 2022-04-12 | 徐州徐工基础工程机械有限公司 | Closed type winch emergency brake control system, equipment and method |
| CN114483296A (en) * | 2022-04-14 | 2022-05-13 | 徐州徐工基础工程机械有限公司 | Engine runaway prevention safety control system and method |
| CN114604791A (en) * | 2022-03-18 | 2022-06-10 | 山河智能装备股份有限公司 | Power recovery system and power recovery method for hoisting mechanism of engineering machinery |
| CN114620631A (en) * | 2022-05-12 | 2022-06-14 | 徐州徐工基础工程机械有限公司 | Steel wire rope protection control system and method for rotary drilling rig |
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| CN102515049A (en) * | 2011-12-22 | 2012-06-27 | 北京市三一重机有限公司 | Rotary drilling machine, control method for descending of main winch of rotary drilling machine and main winch descending control system of rotary drilling machine |
| CN112897372A (en) * | 2021-03-25 | 2021-06-04 | 徐州徐工基础工程机械有限公司 | Main hoisting system of rotary drilling rig |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114314401A (en) * | 2022-03-07 | 2022-04-12 | 徐州徐工基础工程机械有限公司 | Closed type winch emergency brake control system, equipment and method |
| CN114604791A (en) * | 2022-03-18 | 2022-06-10 | 山河智能装备股份有限公司 | Power recovery system and power recovery method for hoisting mechanism of engineering machinery |
| CN114604791B (en) * | 2022-03-18 | 2023-07-11 | 山河智能装备股份有限公司 | Power recovery system and power recovery method for hoisting mechanism of engineering machinery |
| CN114483296A (en) * | 2022-04-14 | 2022-05-13 | 徐州徐工基础工程机械有限公司 | Engine runaway prevention safety control system and method |
| CN114483296B (en) * | 2022-04-14 | 2022-06-24 | 徐州徐工基础工程机械有限公司 | Engine runaway prevention safety control system and method |
| CN114620631A (en) * | 2022-05-12 | 2022-06-14 | 徐州徐工基础工程机械有限公司 | Steel wire rope protection control system and method for rotary drilling rig |
| CN114620631B (en) * | 2022-05-12 | 2022-07-22 | 徐州徐工基础工程机械有限公司 | Steel wire rope protection control system and method for rotary drilling rig |
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