CN-121976511-A - Screw-driven self-installation power feeler and operation method thereof

CN121976511ACN 121976511 ACN121976511 ACN 121976511ACN-121976511-A

Abstract

The invention belongs to the technical field of ocean geotechnical engineering, and relates to a spiral driving type self-installation power feeler gauge and an operation method thereof. The dynamic feeler comprises a probe, a middle shaft, a tail wing and a screw driving system. The spiral piece in the spiral driving system rotates under the driving of the motor to generate axial propelling force, so that the continuous penetration of the dynamic feeler in the seabed soil is realized. The anti-torsion wing plate is further arranged on the dynamic sounding instrument, and provides a lateral soil body counter force in the penetrating process, so that the integral rotation of the dynamic sounding instrument is effectively restrained, and the stability of the penetrating process is ensured. The invention overcomes the defects that the traditional dynamic sounding instrument cannot continuously penetrate into test and has limited depth, realizes continuous and controllable penetration and test of any target depth in seabed soil under the condition of almost not increasing the whole weight, has no special requirements on investigation of ship and sea conditions, and remarkably improves the applicability and engineering application capability of the dynamic sounding instrument in deep water and complex seabed environments.

Inventors

LIU JUN
YOU WEI
HAN CONGCONG

Assignees

大连理工大学

Dates

Publication Date: 20260505
Application Date: 20260324

Claims (8)

1. A spiral driving type self-installation power feeler instrument is characterized in that: The spiral driving type self-installation power feeler mainly comprises a probe, a middle shaft, an anti-torsion wing plate, a tail wing and a spiral driving system; The middle shaft is a section of cylinder, is cut into three sections from the middle part, and is divided into a lower section middle shaft, a middle section middle shaft and an upper section middle shaft; The front end of the lower section center shaft is connected with the probe, the axes are collinear, a force sensor and a pore pressure sensor are arranged between the lower section center shaft and the probe, the force sensor is used for measuring the interaction force between the probe and the center shaft, and the pore pressure sensor is used for measuring the water pressure of the dynamic feeler when freely falling in water and the pore water pressure when penetrating into seabed soil; a plurality of torsion-preventing wing plates are arranged on the lower section center shaft at equal intervals along the circumference; the tail end of the upper section central shaft is in a gradually contracted truncated cone shape, and the top of the upper section central shaft is provided with an opening connected with a bearing cable; the spiral driving system mainly comprises an upper layer of screw sheets, a lower layer of screw sheets, a motor, a transmission rod, a connecting rod, an arc push rod and a measurement and control acquisition cabin; The upper section center shaft is connected with the middle section center shaft and the middle section center shaft is connected with the lower section center shaft through connecting rods; The outer side of the connecting rod is coaxially sleeved with a hollow transmission rod; a slot is arranged at the outer side of the connecting part between the upper section center shaft and the middle section center shaft, and an upper layer screw piece is arranged in the slot; A slot is arranged at the outer side of the connecting part between the middle section middle shaft and the lower section middle shaft, and a lower layer screw piece is arranged in the slot; when the upper layer spiral piece and the lower layer spiral piece are completely contracted in the slot, the outer edges of the upper layer spiral piece and the lower layer spiral piece do not exceed the outer wall of the slot, and when the upper layer spiral piece and the lower layer spiral piece are unfolded, the upper layer spiral piece and the lower layer spiral piece extend outwards from the slot along the radial direction of the central axis; the transmission rod is connected with the upper layer of the spiral piece and the lower layer of the spiral piece through an arc push rod, one end of the arc push rod is connected with the transmission rod in a semi-hinged mode, the other end of the arc push rod is provided with a sliding block, and the sliding block is rigidly connected with the upper layer of the spiral piece and the lower layer of the spiral piece; the motor also comprises two matched connecting devices, namely an annular concave gear ring and a convex gear; The lower end of the upper section center shaft is hollowed to form a cylindrical cavity for accommodating a motor, an annular concave gear ring, a measurement and control acquisition cabin and a convex gear, the convex gear is fixedly arranged at the outer edge of the upper part of a transmission rod and isolated from a connecting rod by adopting a bearing assembly, and the annular concave gear ring is arranged at the output end of the motor and meshed with the convex gear; Three communicated guide groove tracks are arranged at the top of the middle section middle shaft and the top of the lower section middle shaft, and the sliding blocks of the arc push rods are embedded in the guide groove tracks; The lower end of the middle section center shaft is hollowed to form a cylindrical cavity for accommodating a motor, an annular concave gear ring and a convex gear, the convex gear is fixedly arranged at the outer edge of the upper part of the transmission rod and isolated from the connecting rod by adopting a bearing assembly, and the annular concave gear ring is arranged at the output end of the motor and meshed with the convex gear; the extension, rotation and contraction of the upper layer spiral piece and the lower layer spiral piece are realized through motor driving; the measurement and control acquisition cabin is internally integrated with a data transmission and acquisition module and a motor control module; the force sensor, the pore pressure sensor and the acceleration sensor are all connected with the data transmission and acquisition module; the motor operates under the control of the motor control module.
2. The screw-driven self-installed power feeler according to claim 1, wherein one end of the carrying cable passes through the top opening of the upper section central shaft to be connected with the motor, and is rigidly connected with the upper section central shaft at the opening, and the other end of the carrying cable is connected with the investigation ship for releasing and recovering the power feeler; The middle of the bearing cable is connected with an automatic unhooking device.
3. The spiral-driven self-installed power penetration tester according to claim 1, wherein the probe is designed to be detachable, and is designed to be conical, spherical or cylindrical according to actual test requirements.
4. A spiral-driven self-mounted power sonde according to claim 1, wherein the number of anti-twist wings and tails is at least 3.
5. The spiral-driven self-installed type dynamic sounding instrument according to claim 1, wherein the arc-shaped push rod corresponding to the upper layer spiral piece and the arc-shaped push rod corresponding to the lower layer spiral piece are arranged in a reverse direction, so that the upper layer spiral piece and the lower layer spiral piece rotate in opposite directions.
6. The screw-driven self-installing dynamic sounding apparatus of claim 1, wherein the motor is driven by the motor control module as follows: The motor rotates positively to drive the transmission rod to rotate, so as to drive the arc push rod to synchronously move, and the sliding block at the end part of the arc push rod moves outwards along the guide groove track, so that the upper layer of screw piece and the lower layer of screw piece are driven to extend outwards along the radial direction of the central shaft from the slot in the central shaft; When the protruding amount of the upper layer of screw sheet and the lower layer of screw sheet reaches a preset value, the motor continuously rotates forward to drive the sliding block to move along the track ring direction of the guide groove, so that the upper layer of screw sheet and the lower layer of screw sheet are driven to rotate, and continuous axial propelling force is generated for the penetration of the dynamic feeler into the soil body of the seabed; When the power feeler reaches a preset depth, the motor starts to rotate reversely to enable the sliding block to move inwards along the track of the guide groove, so that the upper layer of screw piece and the lower layer of screw piece are driven to shrink into the slot.
7. A method of operating a screw-driven self-installing power feeler according to any of claims 1-6, characterized in that the installation of the power feeler uses a survey vessel and an automatic unhooking device; the penetrating process of the dynamic feeler in the seabed soil comprises two stages of penetrating into the seabed at a high speed by means of self weight and penetrating into the seabed at a constant speed by means of a spiral driving system in the dynamic feeler, and the method is specifically as follows: (1) The method comprises the steps of releasing a power feeler into sea water from a reconnaissance ship, enabling the power feeler to descend to a preset height from the surface of a seabed, and then starting an automatic unhooking device to enable the power feeler to freely fall in water and penetrate into the seabed soil body at a higher speed; (2) When the dynamic feeler penetrates into the soil body of the seabed by means of dead weight and stops moving, the motor is started, so that the upper layer screw piece and the lower layer screw piece extend outwards from the slot; In the process, a force sensor and a pore pressure sensor are used for respectively monitoring the interaction force between a probe and a center shaft and the excess pore water pressure generated in the penetrating process of the dynamic feeler; (3) When the measuring depth of the dynamic feeler reaches the designed depth, the motor is controlled to rotate reversely to recover the upper layer of screw sheet and the lower layer of screw sheet into the slot, and then the bearing cable is tensioned from the investigation ship to pull out the dynamic feeler from the seabed and recover the dynamic feeler to the investigation ship.
8. A method of operating a screw-driven self-installing dynamic sounding apparatus as set forth in claim 7, wherein: the power supply mode of the motor adopts an external power supply; The external power supply is arranged on the investigation ship and is connected with the motor through a bearing cable.

Description

Screw-driven self-installation power feeler and operation method thereof Technical Field The invention belongs to the technical field of ocean geotechnical engineering, and relates to a spiral driving type self-installation power feeler gauge and an operation method thereof. Background With the continuous promotion of ocean oil and gas resource development and ocean space utilization, various submarine structures such as submarine cables, shallow foundations, anchoring foundations, exploitation wells and the like are widely applied. Before the dimensional design and stability analysis of the submarine structure are carried out, the intensity parameters of the seabed soil mass and the change characteristics of the seabed soil mass along the depth direction need to be accurately mastered. Because the offshore sampling operation condition is complex, the sampling process is difficult to avoid disturbing the original structure of the soil body, so that the sampling cost is high, the testing period is long, and the acquired soil body strength parameter has larger discreteness. Therefore, the in-situ test technology capable of directly obtaining the soil mechanical parameters in situ on the seabed is widely applied to marine geotechnical engineering. The existing submarine in-situ test method mainly comprises two types of static sounding and dynamic sounding. The static sounding generally needs to be conducted by means of a large-scale reaction frame or a ballast system, a professional survey ship is used for distributing the reaction frame on the surface of the seabed, then a sounding probe is driven to penetrate into the seabed soil body at a constant speed, and the strength parameter of the seabed soil is calculated by measuring the penetration resistance. The method has higher requirements on conditions of the investigation ship and higher test cost. The dynamic sounding instrument gets rid of the limitation of a large-scale reaction frame, freely falls in the sea water by means of self weight and penetrates into the seabed soil body at a high speed, and the seabed soil strength parameter is obtained by measuring acceleration and carrying out inversion calculation. The method has the advantages of simple operation, high test efficiency, low requirements on ships and the like, and is widely paid attention to the engineering world in recent years. However, existing dynamic penetration probes mainly rely on self-weight penetration, the penetration depth of which is limited by equipment weight and soil strength conditions, and continuous and stable in-situ testing in harder formations or deep sea beds is difficult to achieve. Therefore, a dynamic feeler that can expand the range of use is needed. Disclosure of Invention Aiming at the defects that the penetration depth of the dynamic feeler is shallow and the strength parameter of a deep soil body cannot be measured, the invention provides a spiral driving type self-installation dynamic feeler and an operation method thereof, so as to expand the application range of the dynamic feeler. After the dynamic feeler is penetrated into the seabed at a high speed by means of self weight, the spiral driving system is started to enable the dynamic feeler to continuously penetrate into the deeper seabed, and a large counter-force device is not needed, so that the measuring depth range of the dynamic feeler is enlarged. The technical scheme of the invention is as follows: 1. spiral driving type self-installation power feeler The spiral driving self-installing dynamic sounding instrument consists of mainly probe, central shaft, tail fin, torsion preventing wing plate and spiral driving system. The probe is positioned at the bottommost part of the dynamic sounding instrument, adopts a detachable structure and is designed to be conical, spherical or cylindrical according to actual testing requirements. The upper part of the probe is connected with a central shaft, and the whole central shaft is in a cylindrical structure. The middle shaft is cut into three sections from the middle part, and is divided into a lower section middle shaft, a middle section middle shaft and an upper section middle shaft. A plurality of torsion-preventing wing plates are arranged on the lower section center shaft at equal intervals along the circumference. The tail part of the upper section middle shaft is in a contracted truncated cone shape, and a plurality of tail wings are arranged at equal intervals along the circumference. The torsion-preventing wing plates and the tail wings are at least 3 and are used for providing counter force through surrounding soil bodies in the penetrating process, so that the whole rotation of the power feeler gauge is limited, and the directional stability of the power feeler gauge in free falling in water can be ensured. The top end of the upper section center shaft is provided with a circular hole for a bearing cable to pass through. One end of the bearing cable can