Rotary drilling rig, automatic drilling self-locking device, drilling control system and control method

Abstract

The present invention relates to an automatic drilling self-locking device for a rotary drilling rig, a drilling control system and a control method, comprising a handle, a pressure plate, a power head motor, a main valve, a self-locking pilot valve, an annular self-locking electromagnet, a pressurizing solenoid valve, a main pump, an auxiliary valve, a floating solenoid valve, a winch motor and a pressurizing oil cylinder. The device can not only realize the drilling self-locking function of the power head, but also realize the intelligent operation of automatic drilling through system control of pressurizing linkage, reduce the fatigue intensity of operators and improve construction efficiency.

Description

Technical field:

[0001] The present invention relates to the technical field of rotary drilling rigs, and in particular to a rotary drilling rig, an automatic drilling self-locking device for the rotary drilling rig, an automatic drilling control system and a control method. Background technology:

[0002] The rotary drilling rig is a hole-forming mechanical equipment with a high degree of integration in the electromechanical industry. It is often used in pile foundation construction, and drilling is a key link in the operation cycle. However, the construction strata are complex and diverse, and the various strata vary greatly. The most troublesome thing is the rock strata, especially the medium-weathered and slightly-weathered rock strata. It often takes several hours of continuous drilling operations to drill a pile. This process requires the operator to continuously perform the same action, which causes serious visual and muscle fatigue to the operator, making the operator miserable.

[0003] At present, rotary drilling rigs generally use ordinary pilot valves for operation. The pilot valves do not have the locking capability, and the drilling rigs do not have the automatic drilling function. The drilling process requires the operator to continuously press the pilot valve to operate the drilling rig. When operating in medium-weathered and slightly-weathered rock formations, it will cause serious visual and muscle fatigue to the operators, thus affecting the construction efficiency. Summary of the invention:

[0004] The objective of the present invention is to provide a rotary drilling rig, an automatic drilling self-locking device for a rotary drilling rig, an automatic drilling control system and a control method, which can not only realize the drilling self-locking function of the power head, but also realize the intelligent operation of automatic drilling through system control and pressurization linkage, thereby reducing the labor intensity of operators and improving construction efficiency.

[0005] To achieve the above-mentioned purpose, the present invention provides an automatic drilling self-locking device for a rotary drilling rig, comprising a self-locking pilot valve, an annular self-locking electromagnet, a pressure plate and a handle, wherein the pressure plate is fixed at the bottom end of the handle, the self-locking pilot valve is correspondingly arranged below one side of the pressure plate, and the annular self-locking electromagnet is sleeved on the top of the self-locking pilot valve. When the handle is pressed down to the maximum position, the annular self-locking electromagnet can be attracted and locked with the pressure plate.

[0006] The drilling process of a rotary drilling rig is usually a composite action of drilling, pressurizing and floating by the power head, that is, the power head needs to assist in pressurizing and floating actions during drilling to achieve the drilling process.

[0007] To achieve the above-mentioned objectives, the present invention also provides an automatic drilling control system with the above-mentioned automatic drilling self-locking device, including a power head motor, a main valve, a self-locking pilot valve, an annular self-locking electromagnet, a pressurizing solenoid valve, a main pump, an auxiliary valve, a floating solenoid valve, a winch motor and a pressurizing cylinder. The main valve is arranged between the main pump and the power head motor, the pressurizing cylinder is connected to the self-locking pilot valve through the auxiliary valve and the pressurizing solenoid valve in sequence, the self-locking pilot valve is respectively connected to the main valve and the annular self-locking electromagnet, and the floating solenoid valve is connected to the main valve through the winch motor.

[0008] In addition, an auxiliary pump is provided between the auxiliary valve and the main pump.

[0009] Preferably, the pressurizing solenoid valve is a two-position six-way solenoid valve.

[0010] For the convenience of control, specifically, the annular self-locking electromagnet, pressurizing solenoid valve, and floating solenoid valve are respectively connected to the electrical system, and the electrical system includes a drilling self-locking button, a controller, a display, and a relay. The drilling self-locking button and the display are respectively connected to the controller, and the annular self-locking electromagnet, pressurizing solenoid valve, and floating solenoid valve are respectively connected to the controller through relays.

[0011] In addition, the electrical system also includes a pressure sensor and a depth sensor, and the annular self-locking electromagnet, the pressurizing solenoid valve, and the floating solenoid valve are connected to the controller via the pressure sensor and the depth sensor, respectively.

[0012] The present invention also provides an automatic drilling control method for a rotary drilling rig, which includes the following three control modes:

[0013] 1. The rotary drilling rig starts running, the pressure sensor sends a pressure signal back to the controller, the operating handle performs the drilling action, the self-locking button is pressed, the signal is sent back to the controller, and the controller outputs a signal to the self-locking relay. At this time, the annular self-locking electromagnet is energized, the locking handle enters the drilling state, the pilot oil is controlled to be connected to the main valve, and the main valve spool is pushed to keep the power head motor in the oil-receiving drilling state;

[0014] Second, press the self-locking button. After an interval of t1 seconds, the controller outputs a pressurization signal to the pressurization relay, and the pressurization solenoid valve is energized. At this time, the pressurization solenoid valve is connected to the left pilot oil of the self-locking pilot valve, pushing the auxiliary valve spool to make the pressurization cylinder get oil, that is, the pressurization action is performed. After an interval of t2 seconds, the controller disconnects the pressurization signal, the pressurization solenoid valve loses power and resets, and the pressurization action stops. After an interval of t1 seconds, the pressure action is performed again, and the execution time is t2 seconds. This cycle realizes the automatic pressurization drilling function of the rotary drilling rig until the single drilling depth reaches the system setting value or the self-locking button is pressed again;

[0015] 3. Press the self-locking button. After an interval of t1 seconds, the controller outputs a floating signal to the floating relay, which controls the floating solenoid valve to be energized. At this time, the winch motor is connected to realize the floating action. After an interval of t2 seconds, the controller disconnects the floating signal and the floating action stops. After an interval of t1 seconds, the floating action is executed again, and the execution time is t2 seconds. This cycle realizes the automatic pressurized drilling function of the rotary drilling rig until the single drilling depth reaches the system setting value or the self-locking button is pressed again.

[0016] The present invention also provides a rotary drilling rig, which has the automatic drilling self-locking device and the automatic drilling control system.

[0017] The present invention has the following positive effects: the rotary drilling rig, automatic drilling self-locking device, drilling control system and control method have clear and reasonable control logic, realize automatic drilling function, reduce fatigue and discomfort of operators, and improve equipment construction efficiency. Description of the drawings:

[0018] Figure 1 It is a structural schematic diagram of the automatic drilling self-locking device of the rotary drilling rig of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the automatic drilling control system of the rotary drilling rig of the present invention;

[0020] Figure 3 The electrical schematic diagram of the automatic drilling control system of the rotary drilling rig of the present invention. Specific implementation method:

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0022] like Figure 1 The automatic drilling self-locking device of a rotary drilling rig shown in the figure includes a self-locking pilot valve 1, an annular self-locking electromagnet 2, a pressure plate 3 and a handle 4. The pressure plate 3 is fixed at the bottom end of the handle 4, and the self-locking pilot valve 1 is correspondingly arranged below one side of the pressure plate 3. The annular self-locking electromagnet 2 is sleeved on the top of the self-locking pilot valve 1. When the handle 4 is pressed down to the maximum position, the annular self-locking electromagnet 2 can be attracted and locked with the pressure plate 3.

[0023] The left position of the self-locking pilot valve 1 controls the drilling of the power head. The plug of the left position of the self-locking pilot valve 1 is changed to the annular self-locking electromagnet 2, and the pressure plate 3 structure is changed to a magnetic adsorbable structure. When the annular self-locking electromagnet 2 is energized, the annular self-locking electromagnet 2 forms a magnetic field. At this time, the handle 4 is manipulated to the left position, that is, the power head drilling position, and the pressure plate 3 presses the annular self-locking electromagnet 2 and keeps it in the locked state. At the same time, the pressure plate 3 pushes the valve core of the self-locking pilot valve 1 to realize the drilling locking function.

[0024] like Figure 2 An automatic drilling control system with the above-mentioned automatic drilling self-locking device is shown, including a power head motor 11, a main valve 12, a self-locking pilot valve 13, a pressurizing solenoid valve 4, a main pump 5, an auxiliary pump 6, an auxiliary valve 7, a floating solenoid valve 8, a winch motor 9 and a pressurizing cylinder 10. The main valve 12 is arranged between the main pump 5 and the power head motor 11, and the pressurizing cylinder 10 is connected to the self-locking pilot valve 13 through the auxiliary valve 7 and the pressurizing solenoid valve 4 in sequence. An auxiliary pump 6 is arranged between the auxiliary valve 7 and the main pump 5. The self-locking pilot valve 13 is respectively connected to the main valve 12 and the annular self-locking electromagnet, and the floating solenoid valve 8 is connected to the main valve 12 through the winch motor 9.

[0025] The pressurizing solenoid valve 4 is a two-position six-way solenoid valve, which is arranged in the pilot oil circuit of the pressurizing action. The two oil inlets are respectively the pilot oil of the front position of the handle (i.e. the pilot oil of the pressurizing action) and the pilot oil of the left position of the handle (i.e. the pilot oil of the power head drilling). The on and off of the pressurizing solenoid valve 4 is controlled by the controller system.

[0026] The annular self-locking electromagnet, the pressurizing electromagnetic valve, and the floating electromagnetic valve are respectively connected to the electrical system, such as Figure 3 As shown, the electrical system includes a drilling self-locking button, a controller, a display and a relay. The drilling self-locking button and the display are respectively connected to the controller, and the annular self-locking electromagnet, the pressurizing solenoid valve and the floating solenoid valve are respectively connected to the controller through the relay; the electrical system also includes a pressure sensor and a depth sensor. The annular self-locking electromagnet, the pressurizing solenoid valve and the floating solenoid valve are respectively connected to the controller through the pressure sensor and the depth sensor.

[0027] The drilling self-locking button is an automatic drilling enabling button, and uses a button provided on the handle.

[0028] The pressure sensor detects the system pressure and uses the system pressure as an error-proof condition to determine whether the control logic is executed to avoid misoperation. That is, if the pressure sensor normally transmits a pressure signal, the controller determines that automatic drilling can be executed. If the sensor has no pressure signal or the pressure signal is abnormal, the controller determines that the automatic drilling logic will not be executed.

[0029] The depth sensor monitors the drilling status in real time. When the single drilling depth reaches the system set value, the system determines that the current drilling work is completed and immediately stops executing the automatic drilling logic.

[0030] The logic of the automatic drilling control method of the rotary drilling rig of the present invention is as follows:

[0031] Control logic 1: The rotary drilling rig starts running, the pressure sensor transmits a pressure signal to the controller, the operating handle 4 is moved to the left position to perform the drilling action, the self-locking button is pressed (jog), the signal is transmitted back to the controller, and the controller outputs a signal to the self-locking relay. At this time, the annular self-locking electromagnet is energized, the magnetic force attracts the pressure plate 3, and the handle 4 is locked in the left position drilling state. The pilot oil is controlled to be connected to the b1 port of the main valve 12, and the valve core of the main valve 12 is pushed to keep the B port of the power head motor 11 in the oil drilling state.

[0032] Control logic 2: Press the self-locking button (jog), and after an interval of t1 seconds, the controller outputs a pressurization signal to the pressurization relay, and the pressurization solenoid valve 4 is energized. At this time, the P' port of the pressurization solenoid valve 4 is connected to the left pilot oil of the self-locking pilot valve 13, pushing the valve core of the auxiliary valve 7, so that the pressurization cylinder 10 can get oil, that is, the pressurization action is performed. After an interval of t2 seconds, the controller disconnects the pressurization signal, the pressurization solenoid valve 4 loses power and resets, and the pressurization action stops; after an interval of t1 seconds, the pressure action is performed again, and the execution time is t2 seconds; this cycle realizes the automatic pressurization drilling function of the rotary drilling rig until the single drilling depth reaches the system setting value or the self-locking button (jog) is pressed again.

[0033] Control logic three: Press the self-locking button (jog), after an interval of t1 seconds, the controller outputs a floating signal to the floating relay, controls the floating solenoid valve 8 to be energized, and then the A and B ports of the hoisting motor 9 are connected to realize the floating action. After an interval of t2 seconds, the controller disconnects the floating signal and the floating action stops. After an interval of t1 seconds, the floating action is executed again, and the execution time is t2 seconds; this cycle realizes the automatic pressurized drilling function of the rotary drilling rig until the single drilling depth reaches the system setting value or the self-locking button (jog) is pressed again.

[0034] When the single drilling depth reaches the system setting value or the self-locking button is pressed again (jog), the system determines that the current drilling work is completed and immediately stops executing the above logic.

[0035] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An automatic drilling control system with an automatic drilling self-locking device for a rotary drilling rig, characterized in that: The automatic drilling self-locking device of the rotary drilling rig includes a self-locking pilot valve, an annular self-locking electromagnet, a pressure plate and a handle, wherein the pressure plate is fixed at the bottom end of the handle, the self-locking pilot valve is correspondingly arranged below one side of the pressure plate, and the annular self-locking electromagnet is sleeved on the top of the self-locking pilot valve. When the handle is pressed down to the maximum position, the annular self-locking electromagnet can be attracted and locked with the pressure plate; The automatic drilling control system includes a power head motor, a main valve, a pressurizing solenoid valve, a main pump, an auxiliary valve, a floating solenoid valve, a winch motor and a pressurizing cylinder. The main valve is arranged between the main pump and the power head motor. The pressurizing cylinder is connected to the self-locking pilot valve through the auxiliary valve and the pressurizing solenoid valve in sequence. The self-locking pilot valve is respectively connected to the main valve and the annular self-locking electromagnet. The floating solenoid valve is connected to the winch motor through the main valve. An auxiliary pump is also arranged between the auxiliary valve and the main pump. The pressurizing solenoid valve is a two-position six-way solenoid valve.

2. The automatic drilling control system according to claim 1, characterized in that: The annular self-locking electromagnet, pressurizing solenoid valve, and floating solenoid valve are respectively connected to the electrical system, and the electrical system includes a drilling self-locking button, a controller, a display, and a relay. The drilling self-locking button and the display are respectively connected to the controller, and the annular self-locking electromagnet, pressurizing solenoid valve, and floating solenoid valve are respectively connected to the controller through a relay.

3. The automatic drilling control system according to claim 2, characterized in that: The electrical system also includes a pressure sensor and a depth sensor. The annular self-locking electromagnet, the pressurizing solenoid valve, and the floating solenoid valve are connected to the controller via the pressure sensor and the depth sensor, respectively.

4. A method for controlling automatic drilling of a rotary drilling rig, using the automatic drilling control system according to claim 3, characterized in that: include 1. The rotary drilling rig starts running, the pressure sensor sends a pressure signal back to the controller, the operating handle performs the drilling action, the self-locking button is pressed, the signal is sent back to the controller, and the controller outputs a signal to the self-locking relay. At this time, the annular self-locking electromagnet is energized, the locking handle enters the drilling state, the pilot oil is controlled to be connected to the main valve, and the main valve spool is pushed to keep the power head motor in the oil-receiving drilling state; Second, press the self-locking button. After an interval of t1 seconds, the controller outputs a pressurization signal to the pressurization relay, and the pressurization solenoid valve is energized. At this time, the pressurization solenoid valve is connected to the left pilot oil of the self-locking pilot valve, pushing the auxiliary valve spool to make the pressurization cylinder get oil, that is, the pressurization action is performed. After an interval of t2 seconds, the controller disconnects the pressurization signal, the pressurization solenoid valve loses power and resets, and the pressurization action stops. After an interval of t1 seconds, the pressure action is performed again, and the execution time is t2 seconds. This cycle realizes the automatic pressurization drilling function of the rotary drilling rig until the single drilling depth reaches the system setting value or the self-locking button is pressed again; 3. Press the self-locking button. After an interval of t1 seconds, the controller outputs a floating signal to the floating relay, which controls the floating solenoid valve to be energized. At this time, the winch motor is connected to realize the floating action. After an interval of t2 seconds, the controller disconnects the floating signal and the floating action stops. After an interval of t1 seconds, the floating action is executed again, and the execution time is t2 seconds. This cycle realizes the automatic pressurized drilling function of the rotary drilling rig until the single drilling depth reaches the system setting value or the self-locking button is pressed again.

5. A rotary drilling rig, characterized in that: The rotary drilling rig has an automatic drilling control system as described in any one of claims 1-3.

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