Adaptive coring drill control system and method for a coring drill, coring drill

Abstract

The application discloses a kind of coring drilling rig's self-adapting coring drilling control system and method, coring drilling rig, which is preset cutting rotational speed and propelling maximum working pressure according to rock stratum geological condition before coring, and sets maximum propelling speed, compares the cutting pressure collected in real time with theoretical cutting pressure interval during coring process, to judge whether real-time cutting pressure matches rock stratum load, and adaptively adjusts the current value of first electric proportional multi-way valve and electric proportional relief valve according to the comparison result, so as to adaptively adjust drilling propelling pressure and cutting rotational speed to match rock stratum load, and propelling speed always keeps maximum, ensure that coring drilling rig carries out self-adapting coring drilling operation with highest coring efficiency, greatly improve the coring efficiency, operating personnel only need to preset cutting rotational speed and propelling maximum working pressure according to rock stratum geological condition, can adaptively adjust and match rock stratum load during coring drilling coring process, control operation is very simple.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coring drilling rig control, in particular, to a self-adaptive coring drilling control system and method of a coring drilling rig, and in addition, to a coring drilling rig adopting the self-adaptive coring drilling control system. BACKGROUND

[0002] The coring drilling rig is an important supporting equipment for advanced prediction and support operation in soft surrounding rock tunnel construction, which mainly plays a role in guaranteeing tunnel construction in poor geological tunnel construction through long-distance advanced geological prediction, geological coring and pipe shed support. In order to meet the coring requirements under different rock layers and different hole diameters, it is necessary to control the coring parameters to match the loaded rock layer, so as to improve the coring efficiency. However, the current coring drilling rig cannot realize self-adaptive coring, and there is a problem of low coring efficiency. Patent CN115163032A discloses a deep drilling hole sidewall coring intelligent drilling rig control system and method, which pre-establishes a parameter database of undamaged rock core drilling under different types of layers in the storage system, drills with the drilling parameters of the softest rock layer, identifies the bending moment of the ring cutting rotary drill in the process of continuous drilling, compares the bending moment value with the database, and retrieves the corresponding bending moment value of the rock core suitable for the rotation speed and the thrust force, adjusts the drilling rig parameters until the bending moment, rotation speed and thrust force are close to the database, and reduces the possibility of rock core damage during drilling. However, this scheme takes the theoretical parameter database as the benchmark, and realizes self-adaptive matching through the matching of construction parameters and parameter database, which requires the parameter database to contain all rock properties and match the actual loaded rock layer. In addition, since the equipment parameters of each different type of coring drilling rig are different, it is necessary to establish multiple parameter databases for the type of coring drilling rig, which is difficult to realize and cannot be practically applied. SUMMARY

[0003] The present application provides a self-adaptive coring drilling control system and method of a coring drilling rig, and a coring drilling rig, which can adaptively adjust the drilling thrust pressure and cutting rotation speed to match the rock layer load, and the thrust speed always maintains the maximum value, ensuring that the coring drilling rig performs self-adaptive coring drilling operation with the highest coring efficiency, greatly improving the coring efficiency. The operator only needs to preset the cutting rotation speed and the maximum working pressure of the thrust according to the rock geological conditions, and the coring drilling process can be adaptively adjusted to match the rock layer load, and the control operation is very simple.

[0004] According to one aspect of the present invention, an adaptive coring drilling control system for a coring drill is provided, comprising a motor, a hydraulic oil tank, a variable piston pump, a first electric proportional multi-way valve, a rotary cutting motor, a propulsion motor, a second electric proportional multi-way valve, an electric proportional relief valve, a control device, a first pressure sensor, a first speed sensor, a second speed sensor, and a second pressure sensor. The motor is driven and connected to the variable piston pump, and the variable piston pump is respectively connected to the hydraulic oil tank, the first electric proportional multi-way valve, and the second electric proportional multi-way valve. The first electric proportional multi-way valve is connected to the rotary cutting motor for controlling the cutting speed. The second electric proportional The multi-way valve is connected to the propulsion motor for controlling the propulsion speed, the electric proportional relief valve is connected to the second electric proportional multi-way valve for controlling the maximum propulsion working pressure, the first pressure sensor is used to measure the cutting pressure in real time, the second pressure sensor is used to measure the propulsion pressure in real time, the first speed sensor is used to measure the speed of the rotary cutting motor in real time, the second speed sensor is used to measure the speed of the propulsion motor in real time, the first electric proportional multi-way valve, the second electric proportional multi-way valve, the electric proportional relief valve, the first pressure sensor, the first speed sensor, the second speed sensor and the second pressure sensor are all electrically connected to the control device;

[0005] The control device is used to set the initial current values ​​of the first electric proportional multi-way valve and the electric proportional relief valve according to the geological conditions of the rock formation before starting to drill and coring, and to set the initial current value of the second electric proportional multi-way valve to the maximum, thereby controlling the rotary cutting motor to operate at a preset cutting speed and controlling the propulsion motor to operate at a maximum propulsion speed and a preset maximum propulsion working pressure; it is also used to judge the size of the range between the real-time cutting pressure measured by the first pressure sensor and the theoretical cutting pressure during the drilling and coring process, and adaptively adjust the current values ​​of the first electric proportional multi-way valve and the electric proportional relief valve according to the judgment result, so that the coring drill can perform adaptive coring drilling with the highest coring efficiency.

[0006] Furthermore, when the real-time cutting pressure is less than the theoretical cutting pressure interval, the control device then determines the size of the real-time propulsion pressure measured by the second pressure sensor and the preset propulsion maximum working pressure interval, wherein the preset propulsion maximum working pressure interval is determined by the preset propulsion maximum working pressure. If the real-time propulsion pressure is less than the preset propulsion maximum working pressure interval, the current value of the first electric proportional multi-way valve is controlled to increase until the real-time cutting pressure is within the theoretical cutting pressure interval, or until the cutting speed reaches the maximum cutting speed.

[0007] Furthermore, if the real-time thrust pressure is within a preset maximum thrust working pressure range, the control device controls the current value of the electric proportional relief valve to increase until the real-time cutting pressure is within a theoretical cutting pressure range.

[0008] Furthermore, if the electric proportional overflow valve has increased to the maximum current value, but the cutting pressure is still not within the theoretical cutting pressure range, the control device controls the current value of the first electric proportional multi-way valve to increase until the real-time cutting pressure is within the theoretical cutting pressure range, or until the cutting speed reaches the maximum cutting speed.

[0009] Furthermore, when the real-time cutting pressure is greater than the theoretical cutting pressure interval, the control device then determines the size of the real-time propulsion pressure measured by the second pressure sensor and the preset propulsion maximum working pressure interval, wherein the preset propulsion maximum working pressure interval is determined by the preset propulsion maximum working pressure. If the real-time propulsion pressure is less than the preset propulsion maximum working pressure interval, the current value of the first electric proportional multi-way valve is controlled to decrease until the real-time cutting pressure is within the theoretical cutting pressure interval, or until the cutting speed reaches the minimum cutting speed.

[0010] Furthermore, if the real-time thrust pressure is within a preset maximum thrust working pressure range, the control device controls the current value of the electric proportional relief valve to decrease until the real-time cutting pressure is within a theoretical cutting pressure range.

[0011] Furthermore, if the electric proportional overflow valve has been reduced to the minimum current value, but the cutting pressure is still not within the theoretical cutting pressure range, the control device controls the current value of the first electric proportional multi-way valve to decrease until the real-time cutting pressure is within the theoretical cutting pressure range, or until the cutting speed reaches the minimum cutting speed.

[0012] Furthermore, when the real-time cutting pressure is within the theoretical cutting pressure range, the control device does not adjust the current values ​​of the first electric proportional multi-way valve and the electric proportional relief valve, and the core drilling rig operates at the maximum propulsion speed and the optimal cutting pressure.

[0013] In addition, the present invention also provides an adaptive coring drilling control method for a coring drill, which adopts the adaptive coring drilling control system described above and includes the following contents:

[0014] Before starting to drill and coring, the initial current values ​​of the first electric proportional multi-way valve and the electric proportional relief valve are set according to the geological conditions of the rock formation, and the rotary cutting motor is controlled to operate at a preset cutting speed and the propulsion motor is controlled to operate at a maximum propulsion speed and a preset maximum propulsion working pressure;

[0015] During the coring process, the current values ​​of the first electric proportional multi-way valve and the electric proportional relief valve are adaptively adjusted according to the size of the real-time cutting pressure measured by the first pressure sensor and the theoretical cutting pressure range, so that the coring drill can perform adaptive coring drilling with the highest coring efficiency.

[0016] In addition, the present invention also provides a coring drill rig that adopts the adaptive coring drilling control system as described above.

[0017] The present invention has the following beneficial effects:

[0018] The adaptive coring drilling control system of the coring drill rig of the present invention preliminarily presets the cutting speed and the maximum working pressure of the propulsion according to the geological conditions of the rock formation before coring, and sets the maximum propulsion speed. During the coring process, the real-time collected cutting pressure is compared with the theoretical cutting pressure range to determine whether the real-time cutting pressure matches the rock formation load, and the current values ​​of the first electric proportional multi-way valve and the electric proportional relief valve are adaptively adjusted according to the comparison result, so as to adaptively adjust the drilling propulsion pressure and the cutting speed to match the rock formation load, and the propulsion speed is always kept at the maximum value, ensuring that the coring drill rig performs adaptive coring drilling operations with the highest coring efficiency, greatly improving the coring efficiency. The operator only needs to preset the cutting speed and the maximum working pressure of the propulsion according to the geological conditions of the rock formation with one click, and can adaptively adjust to match the rock formation load during the coring drilling process, and the control operation is very simple.

[0019] In addition, the adaptive coring drilling control method and the coring drilling rig of the present invention also have the above advantages.

[0020] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a schematic diagram of the hydraulic principle of the adaptive coring drilling control system of the coring drill rig in the preferred embodiment of the present application.

[0023] Figure 2 It is a flow chart of the adaptive coring drilling control method of the coring drill rig according to the preferred embodiment of the present application.

[0024] Description of Reference Numerals

[0025] 1. Motor; 2. Hydraulic oil tank; 3. Variable piston pump; 4. First electric proportional multi-way valve; 5. Rotary cutting motor; 6. Propulsion motor; 7. Second electric proportional multi-way valve; 8. Electric proportional relief valve; 9. Control device; 10. First pressure sensor; 11. First speed sensor; 12. Second speed sensor; 13. Second pressure sensor. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] Reference Figure 1The preferred embodiment of the present application provides an adaptive coring drilling control system for a coring drill, comprising a motor 1, a hydraulic oil tank 2, a variable displacement piston pump 3, a first electric proportional multi-way valve 4, a rotary cutting motor 5, a propulsion motor 6, a second electric proportional multi-way valve 7, an electric proportional relief valve 8, a control device 9, a first pressure sensor 10, a first speed sensor 11, a second speed sensor 12, and a second pressure sensor 13. The motor 1 is connected to the variable displacement piston pump 3 to provide a power source for the hydraulic system. The variable displacement piston pump 3 is connected to the hydraulic oil tank 2, the first electric proportional multi-way valve 4, and the second electric proportional multi-way valve 7, respectively, to provide high-pressure hydraulic oil. The first electric proportional multi-way valve 4 is connected to the rotary cutting motor 5 to control the cutting speed. By controlling the operating current value of the first electric proportional multi-way valve 4, the input flow of the rotary cutting motor 5 can be controlled, thereby controlling the cutting speed. The cutting speed is proportional to the operating current value of the first electric proportional multi-way valve 4. In addition, the first electric proportional multi-way valve 4 can also control the forward and reverse rotation of the rotary cutting motor 5. The second electric proportional multi-way valve 7 is connected to the propulsion motor 6 and is used to control the propulsion speed. By controlling the working current value of the second electric proportional multi-way valve 7, the input flow of the propulsion motor 6 can be controlled, thereby controlling the propulsion speed. The propulsion speed is proportional to the working current value of the second electric proportional multi-way valve 7. In addition, the second electric proportional multi-way valve 7 can also control the forward and reverse rotation of the propulsion motor 6. Among them, the rotary cutting motor 5 is used to provide rotary cutting power for the equipment, and the propulsion motor 6 is used to provide propulsion power for the coring of the equipment. The electric proportional relief valve 8 is connected to the second electric proportional multi-way valve 7 and is used to control the maximum working pressure of the propulsion. By controlling the working current value of the electric proportional relief valve 8, its maximum relief pressure can be controlled, thereby controlling the maximum working pressure of the propulsion. During operation, the motor 1 starts and drives the variable plunger pump 3 to work. The outlet of the variable plunger pump 3 is connected to the P port of the first electric proportional multi-way valve 4 and the second electric proportional multi-way valve 7. The T port of the first electric proportional multi-way valve 4 and the second electric proportional multi-way valve 7 is connected to the hydraulic oil tank 2. The A and B ports of the first electric proportional multi-way valve 4 are connected to the A and B ports of the rotary cutting motor 5 respectively. The A and B ports of the second electric proportional multi-way valve 7 are connected to the A and B ports of the propulsion motor 6 respectively. The W port of the second electric proportional multi-way valve 7 is connected to the A and B ports through the built-in shuttle valve, that is, the W port takes the high-pressure oil from the A and B ports of the second electric proportional multi-way valve 7. The P port of the electric proportional relief valve 8 is connected to the W port of the second electric proportional multi-way valve 7 to control the maximum working pressure of the propulsion.The first pressure sensor 10 is used to measure the pressure of the rotary cutting motor 5 in real time, that is, to measure the cutting pressure in real time. The second pressure sensor 13 is used to measure the pressure of the propulsion motor 6 in real time, that is, to measure the propulsion pressure in real time. The first speed sensor 11 is used to measure the speed of the rotary cutting motor 5 in real time, that is, the cutting speed. The second speed sensor 12 is used to measure the speed of the propulsion motor 6 in real time. The first electric proportional multi-way valve 4, the second electric proportional multi-way valve 7, the electric proportional overflow valve 8, the first pressure sensor 10, the first speed sensor 11, the second speed sensor 12 and the second pressure sensor 13 are all electrically connected to the control device 9.

[0028] Before starting to drill and coring, the control device 9 sets the initial current values ​​of the first electric proportional multi-way valve 4 and the electric proportional relief valve 8 according to the geological conditions of the rock formation. In different geological conditions of the rock formation, the initial current values ​​of the first electric proportional multi-way valve 4 and the electric proportional relief valve 8 are set to different values, and the initial current value of the second electric proportional multi-way valve 7 is set to the maximum, thereby controlling the rotary cutting motor 5 to work at a preset cutting speed and controlling the propulsion motor 6 to work at a maximum propulsion speed and a preset maximum propulsion working pressure. For example, before coring, the initial forward current value of the first electric proportional multi-way valve 4 is set to i 40 At this time, the equipment cuts at a preset speed n m0 Forward cutting; set the initial current value of the electric proportional relief valve 8 to i 80 At this time, the overflow pressure of the electric proportional overflow valve 8 is P t0 , that is, the maximum pressure of the A and B ports of the second electric proportional multi-way valve 7 is P t0 , that is, the preset maximum working pressure of propulsion is P t0 ; Set the initial current value of the second electric proportional multi-way valve 7 to the maximum forward current value, when the device's advancement speed is the maximum; at this time, the device is at a preset cutting speed n m0 , the preset maximum working pressure of propulsion is P t0 , prepare to drill and advance at the maximum propulsion speed. During the coring process, the pressure parameters and speed parameters are measured in real time by the first pressure sensor 10, the first speed sensor 11, the second speed sensor 12, and the second pressure sensor 13, and fed back to the control device 9. The control device 9 determines the size of the real-time cutting pressure measured by the first pressure sensor 10 and the theoretical cutting pressure range, and adaptively adjusts the current values ​​of the first electric proportional multi-way valve 4 and the electric proportional relief valve 8 based on the judgment result, so that the coring drill can perform adaptive coring drilling with the highest coring efficiency. Among them, the theoretical cutting pressure range is determined by the rated torque and rated pressure of the rotary cutting motor 5, and different models of motors correspond to different pressure ranges.

[0029] It can be understood that the adaptive coring drilling control system of the coring drill rig of this embodiment preliminarily presets the cutting speed and the maximum working pressure of the propulsion according to the geological conditions of the rock formation before coring, and sets the maximum propulsion speed. During the coring process, the real-time collected cutting pressure is compared with the theoretical cutting pressure range to determine whether the real-time cutting pressure matches the rock formation load, and the current values ​​of the first electric proportional multi-way valve 4 and the electric proportional relief valve 8 are adaptively adjusted according to the comparison result, so as to adaptively adjust the drilling propulsion pressure and the cutting speed to match the rock formation load, and the propulsion speed is always kept at the maximum value, ensuring that the coring drill rig performs adaptive coring drilling operations with the highest coring efficiency, greatly improving the coring efficiency. The operator only needs to preset the cutting speed and the maximum working pressure of the propulsion according to the geological conditions of the rock formation with one click, and can adaptively adjust to match the rock formation load during the coring drilling process, and the control operation is very simple.

[0030] It can be understood that when the first pressure sensor 10 measures the real-time cutting pressure P m0 When it is in the theoretical cutting pressure range, it means the real-time cutting pressure P m0 To match the rock formation load, the control device 9 does not adjust the current values ​​of the first electric proportional multi-way valve 4 and the electric proportional relief valve 8, the core drilling rig operates at the maximum propulsion speed and the optimal cutting pressure, and the equipment operates at the highest coring efficiency.

[0031] In addition, when the first pressure sensor 10 measures the real-time cutting pressure P m0 When the value is less than the theoretical cutting pressure range, it indicates that the rock load is relatively soft relative to the core drilling rig. This may be due to the low thrust pressure, which causes the drill to fail to support the rock formation, resulting in low cutting pressure. Alternatively, it may be due to the low cutting speed and the coring torque being much greater than the load, resulting in low cutting pressure.

[0032] At this time, the control device 9 determines the real-time propulsion pressure P measured by the second pressure sensor 13. t The preset maximum working pressure range P t区间 The size of the preset maximum working pressure range P t区间 By the preset maximum working pressure P t0 Determine, generally, P t区间 =P t0 ±1MPa, and the preset maximum working pressure P t0 The working current value of the electric proportional relief valve 8 is determined. If the real-time propulsion pressure P t Less than the preset maximum working pressure range P t区间, indicating that the actual propulsion pressure is lower than the preset maximum propulsion pressure, that is, the electric proportional relief valve 8 is not working. At this time, even if the working current value of the electric proportional relief valve 8 is increased, the propulsion pressure cannot be increased. Then the control device 9 controls the current value of the first electric proportional multi-way valve 4 to increase, thereby increasing the cutting speed until the real-time cutting pressure P m0 If the current value of the first electric proportional multi-way valve 4 increases to the maximum value, that is, the cutting speed increases to the maximum value, the real-time cutting pressure P m0 If it is still not within the theoretical cutting pressure range, it means that the rock load is too small. The core drilling rig will work at the maximum propulsion speed and maximum cutting speed, thereby working at the highest coring efficiency.

[0033] In addition, if the real-time push pressure P t In the preset maximum working pressure range P t区间 The electric proportional relief valve 8 is working. It may be that its working current value is too small, causing the drill to not support the rock formation and resulting in low cutting pressure. Then the control device 9 controls the electric proportional relief valve 8 to increase the current value to increase the propulsion pressure until the real-time cutting pressure P m0 If the electric proportional relief valve 8 has increased to the maximum current value, that is, the propulsion pressure increases to the maximum value, but the cutting pressure P m0 If it is still not within the theoretical cutting pressure range, the control device 9 controls the current value of the first electric proportional multi-way valve 4 to increase, thereby increasing the cutting speed until the real-time cutting pressure P m0 It is within the theoretical cutting pressure range. At this time, the cutting pressure matches the rock load and the equipment works at the highest coring efficiency. If the current value of the first electric proportional multi-way valve 4 increases to the maximum value, that is, the cutting speed increases to the maximum cutting speed, the real-time cutting pressure P m0 If it is still not within the theoretical cutting pressure range, it means that the rock load is too small and the drill rig is working at the maximum propulsion speed and maximum cutting speed, thus working at the highest coring efficiency.

[0034] In addition, when the first pressure sensor 10 measures the real-time cutting pressure P m0 When the pressure is greater than the theoretical cutting pressure range, it indicates that the rock load is relatively hard for the core drilling rig. This may be due to high thrust pressure and high cutting speed, which makes the cutting torque smaller than the load, resulting in high cutting pressure. The drilling rig is at risk of sticking and the system efficiency is low.

[0035] At this time, the control device 9 determines the real-time propulsion pressure P measured by the second pressure sensor 13. t The preset maximum working pressure range P t区间If the real-time push pressure P t Less than the preset maximum working pressure range P t区间 , indicating that the electric proportional relief valve 8 for the propulsion pressure control is not working. At this time, increasing the current value of the electric proportional relief valve 8 cannot increase the propulsion pressure. It is necessary to reduce the cutting speed. Then the current value of the first electric proportional multi-way valve 4 is controlled to decrease until the real-time cutting pressure is within the theoretical cutting pressure range, so that the cutting pressure matches the rock load and the equipment works at the highest coring efficiency. If the current value of the first electric proportional multi-way valve 4 is reduced to the minimum value, that is, the cutting speed is reduced to the minimum cutting speed, but the real-time cutting pressure P m0 If it is still not within the theoretical cutting pressure range, it means that the rock load is too large, the drill rig is working at the maximum propulsion speed, minimum cutting speed, and maximum cutting torque, and the equipment is working at the highest coring efficiency.

[0036] In addition, if the real-time push pressure P t In the preset maximum working pressure range P t区间 In the figure, it indicates that the electric proportional relief valve 8 controlled by the thrust pressure is working. At this time, the current value of the electric proportional relief valve 8 is reduced first to reduce the thrust pressure so that the cutting pressure falls into the theoretical pressure range. Then the control device 9 controls the current value of the electric proportional relief valve 8 to decrease until the real-time cutting pressure is within the theoretical cutting pressure range, so that the cutting pressure matches the rock formation load, and the equipment works at the highest coring efficiency. If the electric proportional relief valve 8 has been reduced to the minimum current value, that is, the thrust pressure is reduced to the minimum value, but the cutting pressure is still not within the theoretical cutting pressure range, then the control device 9 controls the current value of the first electric proportional multi-way valve 4 to decrease, that is, reduce the cutting speed, until the real-time cutting pressure is within the theoretical cutting pressure range, so that the cutting pressure matches the rock formation load, and the equipment works at the highest coring efficiency; if the current value of the first electric proportional multi-way valve 4 is also reduced to the minimum value, that is, the cutting speed is reduced to the minimum cutting speed, but the real-time cutting pressure P m0 If it is still not within the theoretical cutting pressure range, it means that the rock load is too large, the drill rig is working at the maximum propulsion speed, minimum cutting speed, and maximum cutting torque, and the equipment is working at the highest coring efficiency.

[0037] It can be understood that the present invention can adaptively match the rock load by adjusting the thrust pressure and cutting speed when the rock load is small or large, thereby reducing problems such as the risk of drill sticking due to idling during drilling, small coring torque and load mismatch, and large coring torque, thereby greatly improving construction efficiency.

[0038] In addition, if Figure 2 As shown, another embodiment of the present invention further provides an adaptive coring drilling control method for a coring drill, preferably using the adaptive coring drilling control system as described above, including the following contents:

[0039] Step S1: Before starting to drill and coring, the initial current values ​​of the first electric proportional multi-way valve and the electric proportional relief valve are set according to the geological conditions of the rock formation, and the rotary cutting motor is controlled to operate at a preset cutting speed and the propulsion motor is controlled to operate at a maximum propulsion speed and a preset maximum propulsion working pressure;

[0040] Step S2: During the coring process, the current values ​​of the first electric proportional multi-way valve and the electric proportional relief valve are adaptively adjusted according to the size of the real-time cutting pressure measured by the first pressure sensor and the theoretical cutting pressure range, so that the coring drill can perform adaptive coring drilling with the highest coring efficiency.

[0041] It can be understood that the adaptive coring drilling control method of the coring drill rig of this embodiment preliminarily presets the cutting speed and the maximum working pressure of the propulsion according to the geological conditions of the rock formation before coring, and sets the maximum propulsion speed. During the coring process, the real-time collected cutting pressure is compared with the theoretical cutting pressure range to determine whether the real-time cutting pressure matches the rock formation load, and the current values ​​of the first electro-proportional multi-way valve and the electro-proportional relief valve are adaptively adjusted according to the comparison result, so as to adaptively adjust the drilling propulsion pressure and the cutting speed to match the rock formation load, and the propulsion speed is always kept at the maximum value, ensuring that the coring drill rig performs adaptive coring drilling operations with the highest coring efficiency, greatly improving the coring efficiency. The operator only needs to preset the cutting speed and the maximum working pressure of the propulsion according to the geological conditions of the rock formation with one click, and can adaptively adjust to match the rock formation load during the coring drilling process, and the control operation is very simple.

[0042] In addition, another embodiment of the present invention further provides a coring drill, which preferably adopts the adaptive coring drilling control system as described above.

[0043] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An adaptive coring drilling control system for a coring drill, characterized in that: The invention comprises a motor (1), a hydraulic oil tank (2), a variable piston pump (3), a first electric proportional multi-way valve (4), a rotary cutting motor (5), a propulsion motor (6), a second electric proportional multi-way valve (7), an electric proportional overflow valve (8), a control device (9), a first pressure sensor (10), a first speed sensor (11), a second speed sensor (12) and a second pressure sensor (13); the motor (1) is connected to the variable piston pump (3) by driving; the variable piston pump (3) is connected to the hydraulic oil tank (2), the first electric proportional multi-way valve (4) and the second electric proportional multi-way valve (7) respectively; the first electric proportional multi-way valve (4) is connected to the rotary cutting motor (5) for controlling the cutting speed; the second electric proportional multi-way valve (7) is connected to the propulsion motor (5) for controlling the cutting speed; (6) is connected to control the propulsion speed, the electric proportional overflow valve (8) is connected to the second electric proportional multi-way valve (7) to control the maximum propulsion working pressure, the first pressure sensor (10) is used to measure the cutting pressure in real time, the second pressure sensor (13) is used to measure the propulsion pressure in real time, the first speed sensor (11) is used to measure the speed of the rotary cutting motor (5) in real time, the second speed sensor (12) is used to measure the speed of the propulsion motor (6) in real time, the first electric proportional multi-way valve (4), the second electric proportional multi-way valve (7), the electric proportional overflow valve (8), the first pressure sensor (10), the first speed sensor (11), the second speed sensor (12) and the second pressure sensor (13) are all electrically connected to the control device (9); The control device (9) is used to set the initial current values ​​of the first electric proportional multi-way valve (4) and the electric proportional relief valve (8) according to the geological conditions of the rock formation before starting to drill and coring, and to set the initial current value of the second electric proportional multi-way valve (7) to the maximum, thereby controlling the rotary cutting motor (5) to work at a preset cutting speed and controlling the propulsion motor (6) to work at a maximum propulsion speed and a preset maximum propulsion working pressure; and is also used to judge the size of the interval between the real-time cutting pressure measured by the first pressure sensor (10) and the theoretical cutting pressure during the drilling and coring process, and to adaptively adjust the current values ​​of the first electric proportional multi-way valve (4) and the electric proportional relief valve (8) according to the judgment result, so that the coring drill can perform adaptive coring drilling with the highest coring efficiency; When the real-time cutting pressure is less than the theoretical cutting pressure interval, the control device (9) further determines the size of the real-time propulsion pressure measured by the second pressure sensor (13) and the preset propulsion maximum working pressure interval, wherein the preset propulsion maximum working pressure interval is determined by the preset propulsion maximum working pressure. If the real-time propulsion pressure is less than the preset propulsion maximum working pressure interval, the current value of the first electric proportional multi-way valve (4) is controlled to increase until the real-time cutting pressure is within the theoretical cutting pressure interval, or until the cutting speed reaches the maximum cutting speed.

2. The adaptive coring drilling control system of the coring drill according to claim 1, characterized in that: If the real-time thrust pressure is within the preset maximum thrust working pressure range, the control device (9) controls the electric proportional relief valve (8) to increase the current value until the real-time cutting pressure is within the theoretical cutting pressure range.

3. The adaptive coring drilling control system of the coring drill according to claim 2, characterized in that: If the electric proportional overflow valve (8) has increased to the maximum current value, but the cutting pressure is still not within the theoretical cutting pressure range, the control device (9) controls the current value of the first electric proportional multi-way valve (4) to increase until the real-time cutting pressure is within the theoretical cutting pressure range, or until the cutting speed reaches the maximum cutting speed.

4. The adaptive coring drilling control system of the coring drill according to claim 1, characterized in that: When the real-time cutting pressure is greater than the theoretical cutting pressure interval, the control device (9) further determines the size of the real-time propulsion pressure measured by the second pressure sensor (13) and the preset propulsion maximum working pressure interval, wherein the preset propulsion maximum working pressure interval is determined by the preset propulsion maximum working pressure. If the real-time propulsion pressure is less than the preset propulsion maximum working pressure interval, the current value of the first electric proportional multi-way valve (4) is controlled to decrease until the real-time cutting pressure is within the theoretical cutting pressure interval, or until the cutting speed reaches the minimum cutting speed.

5. The adaptive coring drilling control system of the coring drill according to claim 4, characterized in that: If the real-time thrust pressure is within the preset maximum thrust working pressure range, the control device (9) controls the current value of the electric proportional relief valve (8) to decrease until the real-time cutting pressure is within the theoretical cutting pressure range.

6. The adaptive coring drilling control system of the coring drill according to claim 5, characterized in that: If the electric proportional overflow valve (8) has been reduced to the minimum current value, but the cutting pressure is still not within the theoretical cutting pressure range, the control device (9) controls the current value of the first electric proportional multi-way valve (4) to decrease until the real-time cutting pressure is within the theoretical cutting pressure range, or until the cutting speed reaches the minimum cutting speed.

7. The adaptive coring drilling control system of a coring drill according to claim 1, wherein: When the real-time cutting pressure is within the theoretical cutting pressure range, the control device (9) does not adjust the current values ​​of the first electric proportional multi-way valve (4) and the electric proportional relief valve (8), and the core drilling rig operates at the maximum propulsion speed and the optimal cutting pressure.

8. An adaptive coring drilling control method for a coring drill, using the adaptive coring drilling control system according to any one of claims 1 to 7, characterized in that: Includes the following: Before starting to drill and coring, the initial current values ​​of the first electric proportional multi-way valve and the electric proportional relief valve are set according to the geological conditions of the rock formation, and the rotary cutting motor is controlled to operate at a preset cutting speed and the propulsion motor is controlled to operate at a maximum propulsion speed and a preset maximum propulsion working pressure; During the coring process, the current values ​​of the first electric proportional multi-way valve and the electric proportional relief valve are adaptively adjusted according to the size of the real-time cutting pressure measured by the first pressure sensor and the theoretical cutting pressure range, so that the coring drill can perform adaptive coring drilling with the highest coring efficiency.

9. A core drilling rig, characterized in that: The adaptive coring drilling control system according to any one of claims 1 to 7 is used.

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