Multifunctional exploration drilling machine integrating drilling, standard penetration and testing and drilling, standard penetration and testing method

Abstract

The invention provides a multifunctional exploration drilling machine integrating drilling, standard penetration and testing and a drilling and standard penetration method. The drilling machine comprises a base, a mast assembly, a power head assembly, a hoisting mechanism and a standard penetration testing mechanism. The power head assembly is arranged to freely slide along a first direction and perform limited translation between a first position and a second position along a second direction perpendicular to the first direction; the driver comprises a parallel type power motor which provides torque for the driving mandrel. According to the exploration drilling machine, drilling, coring and standard penetration testing work can be completed at the same time only through one exploration drilling machine, the working process is greatly simplified, and the labor efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of engineering drilling, and in particular to a multifunctional exploration drilling rig integrating drilling standard penetration test and a drilling standard penetration method. Background Art

[0002] In the pre-construction design of projects such as high-speed rail line construction, highway construction, and large storage bases, it is necessary to drill the construction site to take geological core samples to study underground mineral deposits, and standard penetration is also required to obtain the soil hardness at different depths.

[0003] In the prior art, after the exploration drill has drilled a certain depth into the soil, when coring or SPT is being performed, since the coring mechanism and the SPT mechanism are on the same vertical line as the power head, the presence of the power head during coring will inevitably affect the coring work, and during SPT, the SPT hammer will also fall onto the power head. Currently, the main method used is that the operator flips the power head around its rotation axis at a certain angle during coring, and during SPT, the drill is removed and the SPT machine is opened to the site for SPT. The whole process requires two machines to work in turns, resulting in a cumbersome work process and extremely low labor efficiency. Summary of the invention

[0004] The present invention provides a multifunctional exploration drilling rig integrating drilling standard penetration test and a drilling standard penetration method.

[0005] Specifically, the present disclosure is achieved through the following technical solutions:

[0006] In a first aspect, an embodiment of the present disclosure provides a multifunctional exploration drilling rig integrating drilling standard penetration testing, including:

[0007] Pedestal;

[0008] A mast assembly configured as a mounting, supporting and guiding component includes a mast body, wherein the mast body is fixed to the base via a pivot shaft;

[0009] A power head assembly is arranged on the mast body and has a driver and a driving spindle;

[0010] A hoisting mechanism, comprising a hoisting drum and a traction wire rope, wherein one end of the traction wire rope is connected to the hoisting drum, and the other end of the traction wire rope is passed around the mast assembly and connected to a traction hook;

[0011] The standard penetration test mechanism comprises a penetrator, a sounding rod and a standard penetration hammer, wherein the standard penetration hammer has a central through hole and a screw hole for screwing a hanging ear is formed on the upper surface; wherein,

[0012] The power head assembly is configured to slide freely along a first direction and to perform limited translation between a first position and a second position along a second direction perpendicular to the first direction;

[0013] The drive includes a first power motor and a second power motor, wherein the first power motor is arranged in parallel with the second power motor, wherein the first power motor has a first drive shaft, the second power motor has a second drive shaft, and the first drive shaft and the second drive shaft are arranged to provide torque to the drive core shaft individually or jointly.

[0014] In some embodiments, the first power motor and the second power motor are synchronous piston motors, and the synchronous piston motors include sensors and speed controllers, wherein the sensors are arranged at the power output ends of the first drive shaft and the second drive shaft, and are configured to monitor the drive shaft speed and load conditions in real time, and the speed controller is electrically connected to the sensors and the control system for communication, respectively, and is configured to perform speed regulation and torque balance on the synchronous piston motors.

[0015] In some embodiments, the power head assembly has a first mounting plane, whose cross-section is approximately an isosceles trapezoid, the first power motor and the second power motor are symmetrically arranged at the bottom corners on both sides of the first mounting plane, and the drive spindle is arranged at the center position of the first mounting plane, and is respectively connected to the first power motor and the second power motor through a reduction mechanism.

[0016] In some embodiments, the power head assembly includes an upper box, a lower box, and a first coupling, a second coupling, a first reduction mechanism, a second reduction mechanism, a bearing group, and a main drive wheel contained in a containing space enclosed by the upper box and the lower box; wherein,

[0017] The first and second power motors are respectively connected to the first and second reduction mechanisms through the first and second couplings, the first and second reduction mechanisms are meshed and transmitted with the main drive wheel, and the main drive wheel is keyed to the drive spindle.

[0018] In some embodiments, the first reduction mechanism and the second reduction mechanism have the same reduction ratio, which is 1:2.6.

[0019] In some embodiments, it also includes a sliding frame arranged between the power assembly and the mast body, the sliding frame includes a first sliding plate, a second sliding plate, a guide sleeve, a guide rod, a first driving cylinder and a second driving cylinder, wherein:

[0020] One side of the first sliding plate is slidably connected to the mast body along a first direction, and the first driving cylinder is axially symmetrically arranged on both sides of the mast body and drives the first sliding plate to slide up and down along the mast body; the other side of the first sliding plate is fixedly mounted with the second driving cylinder and the guide rod along a second direction.

[0021] The guide sleeve corresponding to the guide rod is arranged on one side of the second sliding plate facing the first sliding plate, and the piston rod of the second driving cylinder is fixedly connected to the second sliding plate; the power head assembly is arranged on the other side of the second sliding plate.

[0022] In some embodiments, it further comprises a first clamp and a second clamp, wherein the first clamp is disposed at the bottom of the power head assembly and connected to the drive spindle for clamping the drill rod;

[0023] The second clamp is fixedly mounted on the bottom of the mast body and is used for clamping the penetrator.

[0024] In some embodiments, the second clamp includes a clamp box and two sets of clamping mechanisms arranged opposite to each other; wherein the clamp box is fixedly mounted on the pivot shaft at the bottom of the mast body and has a through hole formed along a first direction; the clamping mechanisms are symmetrically arranged on both sides of the through hole along a second direction, and the clamping mechanisms include at least a clamping cylinder and a chuck body.

[0025] In some embodiments, when the power head assembly is in a first position, the center axes of the first clamp and the second clamp coincide with each other; when the power head assembly is in a second position, the standard penetration hammer is transported by the winch mechanism to be directly above the first position, and the center line of its center through hole coincides with the center axis of the second clamp.

[0026] In a second aspect, an embodiment of the present disclosure provides a drilling standard penetration method, using the multifunctional exploration drilling rig integrating drilling standard penetration testing according to the first aspect, wherein:

[0027] During drilling, the power head assembly is automatically controlled to be in the first position, and the drill rod is driven downward to drill to the target depth;

[0028] When coring, the power head assembly is automatically switched to the second position, and the winch mechanism tightens the traction wire rope to lift the core tube upward to complete the coring;

[0029] During the standard penetration test, the power head assembly is automatically controlled to be in the second position, and the hoisting mechanism hoists the standard penetration hammer to a preset position directly above the first position, and then the exploration standard penetration hammer operation is carried out.

[0030] According to the disclosed embodiment, a power head assembly adopts a parallel power motor structure, and two parallel power motors can achieve efficient energy transmission and conversion, rapid response and high reliability; by arranging the power head to be able to freely translate and switch between a first position and a second position, the exploration drilling rig can meet multifunctional application scenarios such as drilling, coring and standard penetration testing, and one mobile drilling rig can be used to simultaneously complete drilling, coring and standard penetration testing, which greatly simplifies the work process, achieves the purpose of automation and improves labor efficiency.

[0031] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0033] Figure 1 is a schematic diagram of a multifunctional exploration drilling rig integrating drilling standard penetration testing in one embodiment of the present disclosure from a first perspective;

[0034] Figure 2 is a structural schematic diagram of a power head assembly in an embodiment of the present disclosure;

[0035] Figure 3 is a top view of a power head assembly in one embodiment of the present disclosure;

[0036] Figure 4 is a cross-sectional view of a power head assembly along line AA in one embodiment of the present disclosure;

[0037] Figure 5 is a cross-sectional view of a power head assembly along line BB in one embodiment of the present disclosure;

[0038] Figure 6 It is a schematic diagram of the assembly of a sliding frame and a power head assembly in one embodiment of the present disclosure.

[0039] Reference numerals:

[0040] 10: base;

[0041] 20: Mast assembly; 21: Mast body; 22: Pivot shaft

[0042] 30: power head assembly; 31: driver; 32: drive spindle; 33: first mounting plane; 34: second mounting plane; 35: oiling nozzle; 36: upper box; 37: lower box; 38: main driving wheel; 310: first power motor; 311: second power motor;

[0043] 40: winch mechanism; 41: winch drum;

[0044] 50: Standard penetration testing organization;

[0045] 60: sliding frame; 61: first sliding plate; 62: second sliding plate; 63: guide sleeve; 64: guide rod; 65: first driving cylinder; 66: second driving cylinder;

[0046] 70: second clamp; 71: clamp housing; 72: clamping mechanism; 710: through hole. DETAILED DESCRIPTION

[0047] The present disclosure will now be discussed with reference to several embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0048] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to"; the terms "embodiment" and "one embodiment" are to be interpreted as "at least one embodiment"; the term "another embodiment" is to be interpreted as "at least one other embodiment"; the terms "first", "second", etc. may refer to different or the same objects; the term "setting" is not limited to direct connection or indirect connection, nor is it limited to a specific connection method. Other explicit and implicit definitions may also be included below.

[0049] In the following description, some specific numerical values ​​or numerical ranges may be involved. It should be understood that these numerical values ​​and numerical ranges are merely exemplary, which may be helpful in putting the idea of ​​the present disclosure into practice. However, the description of these examples is not intended to limit the scope of the present disclosure in any way. According to specific application scenarios and requirements, these numerical values ​​or numerical ranges can be set separately.

[0050] As mentioned above, the drilling, coring and standard penetration test processes in the prior art require operators to manually flip the power head or require at least two machines to work in turn, resulting in a cumbersome work process, high labor intensity and low efficiency. The multifunctional exploration drilling rig and standard penetration test method proposed in the embodiments of the present disclosure at least partially solve the above problems. Figures 1 to 6 The structure and working principle of a multifunctional exploration drilling rig integrating drilling standard penetration testing according to an exemplary embodiment of the present disclosure are described below. Figure 1-6As shown, the multifunctional exploration drilling rig integrating drilling and standard penetration testing of the embodiment of the present disclosure generally includes a base 10, a traveling mechanism, a mast assembly 20, a power head assembly 30, a winch mechanism 40 and a standard penetration testing mechanism 50. Those skilled in the art will understand that the multifunctional exploration drilling rig also has other conventional functional components, exemplarily including a boom mechanism, an engine, a mud pool, a clean water pool, etc., but these components are not strongly related to the concept of the present disclosure, and are not described in detail herein, nor are they shown in the drawings.

[0051] Specifically, the base 10 is used to support the various operating parts of the drilling rig. The base 10 is set on a traveling mechanism (not shown in the figure), and the drilling rig is driven as a whole by the traveling mechanism. Exemplarily, the traveling mechanism can be a mechanism such as rollers, crawlers or other driving wheels.

[0052] The mast assembly 20 is configured as a component for installation, support and guidance. For example, a slide, a telescopic frame, a pulley block and a driving cylinder can be installed on the mast assembly, and it can also be used to support and guide the power head assembly. Exemplarily, the mast assembly of the present disclosure includes at least a mast body 21, which is fixed to the base 10 through a pivot shaft 22, so that the mast body 21 can swing with the pivot shaft 22 as the rotation axis, so as to meet the drilling needs of different positions and angles.

[0053] According to an embodiment of the present disclosure, the power head assembly 30 is slidably disposed on the mast body 21, and has a driver 31 and a driving mandrel 32. The power head assembly 30 is configured to slide freely along a first direction (e.g., along a direction parallel to the axis of the mast assembly), and to perform a restricted translation between a first position and a second position along a second direction perpendicular to the first direction (e.g., along a direction perpendicular to the axis of the mast assembly). That is, the power head assembly 30 of the present disclosure is configured to be able to automatically switch between two positions. Exemplarily, the first position can be an operating position where the power head assembly 30 drives the drill rod to drill holes, and the second position can be away from the first position along the second direction, and can be used as a yield position, with a preset yield space, that is, yielding to the space operation requirements of the coring operation or the standard penetration test operation, so that the exploration drilling rig of the present disclosure can achieve a drilling rig that can complete the drilling and coring work of the industrial exploration drilling rig, and can also complete the hammer test work of the industrial exploration standard penetration drilling rig.

[0054] Furthermore, the driver 31 of the present disclosure includes a first power motor 310 and a second power motor 311, and the first power motor 310 and the second power motor 311 are arranged in parallel, that is, the driving spindle 32 of the power head assembly 31 is driven in parallel by the first power motor 310 and the second power motor 311. The present disclosure adopts a parallel drive method to jointly drive a load. Compared with a traditional single drive motor, the two motors can provide greater driving force and can be used to drive a shaft with a larger load, which increases the diversity of application scenarios of the exploration drilling rig, thereby meeting the needs of drilling exploration holes of various sizes.

[0055] Exemplarily, the first power motor 310 of the present invention has a first drive shaft, and the second power motor 311 has a second drive shaft. The first drive shaft and the second drive shaft can be configured to provide torque to the drive spindle 32 individually or together. In parallel mode, the two power motors 310 and 311 are connected in parallel with the drive spindle 32, which can provide a higher power output. Preferably, one of the power motors can be used as the main drive, and the other can be used as an auxiliary drive. The two power motors can back up each other. When one motor fails, the other can continue to work, improving the reliability of the equipment, and when a greater power output is required, the auxiliary drive will automatically start and work with the main drive. Therefore, the dual parallel motors disclosed in the present invention can achieve more efficient energy transfer and conversion, with fast response and high reliability.

[0056] According to an embodiment of the present disclosure, the first power motor 310 and the second power motor 311 are preferably synchronous piston motors, and the parameters such as rated power, rotation speed and torque of the two piston motors are consistent to ensure the same output characteristics.

[0057] Preferably, the synchronous piston motor may include a sensor and a speed controller (not shown in the figure). There are two or more sensors, which are symmetrically arranged at the power output ends of the first drive shaft and the second drive shaft, and are configured to monitor the speed and load conditions of the drive shafts in real time. The speed controller is electrically connected to the sensor and the control system for communication, and is configured to perform speed regulation and torque balance control on the synchronous piston motor.

[0058] More preferably, the speed controller can also reasonably distribute the load according to the monitoring signal of the sensor to avoid overloading of a single motor and affecting the stability and life of the system. The present disclosure does not impose any particular restrictions on the specific types and models of sensors and speed controllers. Those skilled in the art should understand that any sensor (such as a speed sensor, a torque sensor, etc.) or speed controller that can meet the monitoring and control purposes of the present disclosure can be applied to the present disclosure.

[0059] According to an embodiment of the present disclosure, Figure 2 and3 As shown, the power head assembly 30 is a straight quadrangular prism with a cross section that is approximately an isosceles trapezoid, and its upper surface forms a first mounting plane 33 that is approximately an isosceles trapezoid. The first power motor 310 and the second power motor 311 are symmetrically arranged at the bottom corners on both sides of the first mounting plane 33. The drive spindle 32 is arranged at the center of the first mounting plane 33, and the drive spindle 32 is respectively connected to the first power motor 310 and the second power motor 311 through a reduction mechanism. In addition, the power head assembly 30 of the present disclosure may also include a second mounting plane 34 formed on its side for mounting a plurality of oiling nozzles 35.

[0060] like Figure 4 As shown, the power head assembly 30 disclosed in the present invention at least includes an upper box body 36, a lower box body 37, and a first coupling, a second coupling, a first reduction mechanism, a second reduction mechanism, a bearing group, and a main drive wheel 38 contained in the accommodating space enclosed by the upper box body 36 and the lower box body 37. The first reduction mechanism includes a first bearing, a first reduction shaft, and a first reduction spur gear keyed to the first reduction shaft; the second reduction mechanism includes a second bearing, a second reduction shaft, and a second reduction spur gear keyed to the second reduction shaft. Preferably, the first bearing is a tapered roller bearing or a cylindrical roller bearing; an angle of about 60° is formed between the first reduction mechanism and the second reduction mechanism to keep the power head structure compact while ensuring the stability of the power transmission.

[0061] The output shafts of the first and second power motors 310 and 311 are respectively connected to the first and second reduction shafts through the first and second couplings, the first and second reduction spur gears are meshed and driven with the main drive wheel, and the main drive wheel 38 is keyed to the drive spindle 32. The present disclosure provides torque to the main drive wheel through the first and second reduction spur gears connected in parallel to achieve efficient energy transmission.

[0062] Preferably, the first reduction mechanism and the second reduction mechanism have the same reduction ratio, which is 1:2.6. This can provide a sufficiently large torque for the drilling rig, improve the drilling efficiency, and ensure the stability and reliability of the drill rod during the drilling process.

[0063] According to one embodiment of the present disclosure, in order to achieve free switching among drilling, coring and SPT operations, the present disclosure further provides a sliding frame 60 between the power head assembly and the mast assembly, wherein the power head assembly 30 is fixed on the sliding frame 60 and can automatically switch between at least two working positions under the drive of the sliding frame 60.

[0064] Exemplarily, the sliding frame 60 may include a first sliding plate 61 , a second sliding plate 62 , a guide bushing 63 , a guide rod 64 , a first driving cylinder 65 , and a second driving cylinder 66 .

[0065] Among them, one side of the first sliding plate 61 is slidably connected to the mast body 21 along the first direction (i.e., the axial direction of the mast body), and the first driving cylinder 65 is axially symmetrically arranged on both sides of the mast body 21, one end of which is fixedly connected to the pivot shaft 22 of the mast body 21, and the other end is connected to the first sliding plate 61, and is configured to drive the first sliding plate 61 to slide up and down along the mast body 21. The dual-cylinder driving method adopted in the present disclosure can ensure the smoothness of the sliding of the power head assembly and sufficient driving force when the drill pipe is pressurized and fed. In addition, the second driving cylinder 66 and the guide rod 64 are fixedly installed on the other side of the first sliding plate 61 along the second direction, and the second sliding plate 62 is provided with a guide sleeve 63 corresponding to the guide rod 64 on one side of the first sliding plate 61, and the piston rod of the second driving cylinder 66 is fixedly connected to the second sliding plate 62; the power head assembly 30 is arranged on the other side of the second sliding plate 62. The present disclosure adopts a second driving cylinder 66 to drive the second sliding plate 62 to move and position in the second direction relative to the first sliding plate 61, and the structural design of the guide sleeve 63 and the guide rod 64 can better ensure the stability and guiding accuracy of the translation of the second sliding plate.

[0066] According to an embodiment of the present disclosure, the hoisting mechanism 40 includes a hoisting drum 41 and a traction wire rope, one end of the traction wire rope is connected to the hoisting drum 41, and the other end is passed around the mast assembly 20 and connected to the traction hook. It should be understood by those skilled in the art that the hoisting mechanism of the present disclosure can use a conventional hoisting machine to achieve the feeding and lifting of the drill pipe, coring and traction of the standard penetration hammer, etc., and the present disclosure does not specifically limit the structure of the hoisting mechanism.

[0067] According to an embodiment of the present disclosure, a standard penetration test mechanism 50 includes a penetrator, a sounding rod and a standard penetration hammer. The standard penetration hammer has a central through hole, and a screw hole for screwing a lug is formed on the upper surface. During hoisting, the lug is screwed to the screw hole and connected by a traction hook at the end of the traction wire rope.

[0068] According to an embodiment of the present disclosure, the multifunctional exploration drilling rig may further include a first clamp and a second clamp 70. The first clamp (not shown in the figure) is disposed at the bottom of the power head assembly 30 and connected to the driving mandrel 32 for clamping the drill pipe, wherein the first clamp may be a normally closed clamp, which is not particularly limited in the present disclosure.

[0069] The second clamp 70 is fixedly mounted on the bottom of the mast body 21 and is used to clamp the penetrator.

[0070] Specifically, the second clamp 70 includes a clamp box 71 and two sets of clamping mechanisms 72 arranged opposite to each other; wherein, the clamp box 71 is fixedly mounted on the pivot shaft 22 at the bottom of the mast body 21, and has a through hole 710 formed along the first direction; the clamping mechanisms 72 are symmetrically arranged on both sides of the through hole 710 along the second direction, and the clamping mechanisms 72 include at least a clamping cylinder and a chuck body.

[0071] In order to adapt to functions such as drilling, coring and standard penetration, the drilling rig disclosed in the present invention can be configured as follows: when the power head assembly 30 is in the first position, the central axes of the first clamp and the second clamp 70 coincide with each other; when the power head assembly 30 is in the second position, the standard penetration hammer is transported by the winch mechanism 40 to be directly above the first position, and the center line of its central through hole coincides with the center axis of the second clamp 70.

[0072] On the one hand, the second clamp of the present invention can keep the central axis coincident with the first clamp, so that the rotating rod clamped by the drill rod of the first clamp passes through the through hole of the second clamp to perform the center positioning of the second clamp, ensuring the accuracy of the anchor position and avoiding the deviation of the drill rod; on the other hand, when the drill rod needs to be replaced or lengthened, the first clamp can be loosened and the second clamp can be used to assist in clamping the drill rod, so as to facilitate the replacement or lengthening of the drill rod; in addition, the second clamp can also be connected to the electrical signal of the early warning system of the console. For example, when the first clamp fails and causes the drill rod to loosen and fall from the power head, the second clamp can provide early warning clamping for the drill rod that is about to fall, avoiding the danger caused by accidents. Of course, the second clamp of the present invention can also be used to clamp the penetrator during the standard penetration test, so that the second clamp can achieve multi-purpose clamping.

[0073] According to another embodiment provided by the present disclosure, a standard penetration drilling method is provided, wherein the multifunctional exploration drilling rig described in the above embodiment is used in the method, and specifically comprises the following steps:

[0074] During drilling, the power head assembly is automatically controlled to be in the first position, and the drill rod is driven downward to drill to the target depth;

[0075] When coring, the power head assembly is automatically switched to the second position, and the winch mechanism tightens the traction wire rope to lift the core tube upward to complete the coring;

[0076] During the standard penetration test, the power head assembly is automatically controlled to be in the second position. The standard penetration hammer is hoisted to a preset position directly above the first position using the winch mechanism, and then the exploration standard penetration hammer operation is carried out.

[0077] According to the present disclosure, the work of surface drilling, coring and standard penetration hammer test in engineering survey, which should be completed by two or three machines, can be completed by one drilling rig, thereby improving work efficiency, shortening construction progress and reducing the labor intensity of operators.

[0078] The description of the embodiments herein and any reference to directions and orientations are only for the convenience of description and are not to be construed as any limitation on the scope of protection of the present invention. The description of the preferred embodiments may involve combinations of features, which may exist independently or in combination, and the present invention is not particularly limited to the preferred embodiments. The scope of the present invention is defined by the claims.

[0079] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional exploration drilling rig integrating drilling standard penetration test, characterized in that: include: Pedestal; A mast assembly configured as a mounting, supporting and guiding component includes a mast body, wherein the mast body is fixed to the base via a pivot shaft; A power head assembly is arranged on the mast body and has a driver and a driving spindle; A hoisting mechanism, comprising a hoisting drum and a traction wire rope, wherein one end of the traction wire rope is connected to the hoisting drum, and the other end of the traction wire rope is passed around the mast assembly and connected to a traction hook; The standard penetration test mechanism comprises a penetrator, a sounding rod and a standard penetration hammer, wherein the standard penetration hammer has a central through hole and a screw hole for screwing a hanging ear is formed on the upper surface; wherein, The power head assembly is configured to slide freely along a first direction and to perform limited translation between a first position and a second position along a second direction perpendicular to the first direction; The drive includes a first power motor and a second power motor, wherein the first power motor is arranged in parallel with the second power motor, wherein the first power motor has a first drive shaft, the second power motor has a second drive shaft, and the first drive shaft and the second drive shaft are arranged to provide torque to the drive core shaft individually or jointly.

2. The multifunctional exploration drilling rig integrating drilling and standard penetration testing according to claim 1 is characterized in that: The first power motor and the second power motor are synchronous piston motors, and the synchronous piston motors include sensors and speed controllers, wherein the sensors are arranged at the power output ends of the first drive shaft and the second drive shaft, and are configured to monitor the drive shaft speed and load conditions in real time, and the speed controller is electrically connected to the sensors and the control system for communication, respectively, and is configured to perform speed regulation and torque balance on the synchronous piston motors.

3. The multifunctional exploration drilling rig integrating drilling and standard penetration testing according to claim 2 is characterized in that: The power head assembly has a first mounting plane, whose cross-section is approximately an isosceles trapezoid. The first power motor and the second power motor are symmetrically arranged at the bottom corners on both sides of the first mounting plane. The drive spindle is arranged at the center position of the first mounting plane and is respectively connected to the first power motor and the second power motor through a reduction mechanism.

4. The multifunctional exploration drilling rig integrating drilling and standard penetration testing according to claim 3 is characterized in that: The power head assembly includes an upper box body, a lower box body, and a first coupling, a second coupling, a first reduction mechanism, a second reduction mechanism, a bearing group, and a main drive wheel contained in a containing space enclosed by the upper box body and the lower box body; wherein, The first and second power motors are respectively connected to the first and second reduction mechanisms through the first and second couplings, the first and second reduction mechanisms are meshed and transmitted with the main drive wheel, and the main drive wheel is keyed to the drive spindle.

5. The multifunctional exploration drilling rig integrating drilling and standard penetration testing according to claim 4 is characterized in that: The first reduction mechanism and the second reduction mechanism have the same reduction ratio, which is 1:2.

6.

6. The multifunctional exploration drilling rig integrating drilling and standard penetration testing according to claim 1, characterized in that: It also includes a sliding frame arranged between the power assembly and the mast body, the sliding frame includes a first sliding plate, a second sliding plate, a guide sleeve, a guide rod, a first driving cylinder and a second driving cylinder, wherein: One side of the first sliding plate is slidably connected to the mast body along a first direction, and the first driving cylinder is axially symmetrically arranged on both sides of the mast body and drives the first sliding plate to slide up and down along the mast body; the other side of the first sliding plate is fixedly mounted with the second driving cylinder and the guide rod along a second direction. The guide sleeve corresponding to the guide rod is arranged on one side of the second sliding plate facing the first sliding plate, and the piston rod of the second driving cylinder is fixedly connected to the second sliding plate; the power head assembly is arranged on the other side of the second sliding plate.

7. The multifunctional exploration drilling rig integrating drilling and standard penetration testing according to claim 1 is characterized in that: It also includes a first clamp and a second clamp, wherein the first clamp is disposed at the bottom of the power head assembly and connected to the drive spindle for clamping the drill rod; The second clamp is fixedly mounted on the bottom of the mast body and is used for clamping the penetrator.

8. The multifunctional exploration drilling rig integrating drilling and standard penetration testing according to claim 7 is characterized in that: The second clamp includes a clamp box and two sets of clamping mechanisms arranged opposite to each other; wherein the clamp box is fixedly mounted on the pivot shaft at the bottom of the mast body and has a through hole formed along a first direction; the clamping mechanisms are symmetrically arranged on both sides of the through hole along a second direction, and the clamping mechanisms include at least a clamping cylinder and a chuck body.

9. The multifunctional exploration drilling rig integrating drilling and standard penetration testing according to claim 8, characterized in that: When the power head assembly is in the first position, the central axes of the first clamp and the second clamp coincide with each other; when the power head assembly is in the second position, the standard penetration hammer is transported by the winch mechanism to the position directly above the first position, and the center line of its central through hole coincides with the center axis of the second clamp.

10. A standard penetration drilling method, characterized in that: A multifunctional exploration drilling rig integrating drilling standard penetration test as claimed in any one of claims 1 to 9 is used, wherein: During drilling, the power head assembly is automatically controlled to be in the first position, and the drill rod is driven downward to drill to the target depth; When coring, the power head assembly is automatically switched to the second position, and the winch mechanism tightens the traction wire rope to lift the core tube upward to complete the coring; During the standard penetration test, the power head assembly is automatically controlled to be in the second position, and the hoisting mechanism hoists the standard penetration hammer to a preset position directly above the first position, and then the exploration standard penetration hammer operation is carried out.

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