A guiding extension device for underwater pile foundations

Abstract

This invention relates to the field of offshore oil drilling and production equipment technology, specifically to an underwater pile foundation guiding extension device, comprising: an outer sleeve; a bottom sleeve, the top of which extends into the interior of the outer sleeve and is threadedly connected to the outer sleeve; an inner sleeve disposed inside the outer sleeve; a mandrel disposed inside the inner sleeve; a top connector disposed inside the inner sleeve and connected to the top of the mandrel; a bottom block disposed inside the bottom sleeve and bolted to the bottom sleeve, allowing vertical movement; and a locking sleeve fitted onto the bottom sleeve and connected to the inner sleeve. A sensor assembly and a controller are also included, the controller receiving and processing the locking status data to determine whether to issue an early warning. This invention, by locking the guiding pile extension device onto a guide column using the locking sleeve and locking assembly, can significantly improve the construction efficiency and reliability of underwater pile foundation engineering.

Description

Technical Field

[0001] This invention relates to the field of marine oil drilling and production equipment technology, and more specifically, to a waterborne pile foundation guiding extension device. Background Technology

[0002] Permanent guide bases are among the most important positioning and guiding devices during the installation of subsea oil and gas drilling and production equipment. They are used not only to position the wellhead equipment system and provide inlet guidance for the equipment to be delivered into or onto the wellhead assembly, but also to guide the installation of the Christmas tree. The guide piles located on the permanent guide base are an indispensable part of achieving this guiding function.

[0003] Currently, the guide piles on permanent guide bases produced by various manufacturers are generally of fixed size, which cannot cope with unforeseen situations that occur during on-site installation operations, nor can they be recycled after the underwater oil and gas drilling and production equipment has completed its production tasks.

[0004] Therefore, creating a guide pile that can be freely extended can greatly reduce the production cost of underwater oil and gas drilling equipment and can cope with a variety of installation and operation environments. Summary of the Invention

[0005] In view of this, the present invention proposes an underwater pile foundation guide extension device, mainly to solve the problem of poor applicability of fixed guide pile size on permanent guide base in the prior art.

[0006] In one aspect, the present invention provides a guiding extension device for underwater pile foundations, comprising:

[0007] The outer sleeve has an internal thread at its bottom.

[0008] The bottom sleeve has an external thread on its top, and the top of the bottom sleeve extends into the interior of the outer sleeve and is threadedly connected to the outer sleeve.

[0009] Inner sleeve, which is disposed inside the outer sleeve;

[0010] A mandrel, which is disposed inside the inner sleeve;

[0011] A top connector is disposed inside the inner sleeve and is connected to the top of the mandrel;

[0012] A bottom top block is disposed inside the bottom sleeve, and the bottom top block is bolted to the bottom sleeve and can move in the vertical direction;

[0013] A locking sleeve is fitted onto the bottom sleeve, and the locking sleeve is connected to the inner sleeve.

[0014] A sensor assembly is disposed on the locking sleeve, and the sensor assembly is used to detect locking status data;

[0015] A controller, electrically connected to the sensor assembly, is used to receive and process the locking status data to determine whether to issue an early warning.

[0016] In some embodiments of this application, a first sealing ring is provided between the outer sleeve and the inner sleeve.

[0017] In some embodiments of this application, the outer sleeve has a lifting hole on its body; the top of the top connector has a lifting hole on its top.

[0018] In some embodiments of this application, the outer bottom of the top connector is provided with an external thread, the inner top of the mandrel is provided with an internal thread, and the bottom of the mandrel extends into the top of the top connector and is threadedly connected to the top connector.

[0019] In some embodiments of this application, the outer bottom of the mandrel is provided with an external thread, the inner top of the bottom sleeve is provided with an internal thread, and the top of the mandrel extends into the top of the bottom sleeve and is threadedly connected to the bottom sleeve.

[0020] In some embodiments of this application, a groove is provided on the side wall of the top connector, and a second sealing ring is provided in the groove.

[0021] In some embodiments of this application, the underwater pile foundation guiding extension device further includes a locking assembly, the locking assembly comprising:

[0022] A locking tooth is provided on the bottom sleeve;

[0023] A locking pin is provided on the bottom sleeve, and the locking pin passes through the bottom sleeve and is capable of lateral movement;

[0024] A guide screw, which is threaded onto the locking sleeve;

[0025] A guide pin passes through the guide screw and is inserted into the bottom sleeve.

[0026] In some embodiments of this application, the locking assembly further includes:

[0027] An elastic connector is disposed between the guide screw and the bottom sleeve.

[0028] In some embodiments of this application, the locking sleeve has a groove on its sidewall corresponding to the position of the locking tooth and the locking pin.

[0029] In some embodiments of this application, the sensor assembly includes:

[0030] A position sensor is disposed on the locking sleeve, and the position sensor is used to detect whether the locking sleeve is in the locked position or the unlocked position;

[0031] The locking position metal trigger point is set at a position corresponding to the bottom edge of the locking sleeve in the locked state;

[0032] The unlocking position metal trigger point is set at the position corresponding to the bottom edge of the locking sleeve in the unlocked state.

[0033] In some embodiments of this application, the sensor assembly further includes:

[0034] A first pressure sensor is disposed at the position where the locking pin contacts the bottom top block, and the first pressure sensor is used to detect a first pressure value Pa of the locking pin;

[0035] The second pressure sensor is located at the position where the jaw contacts the guide post, and the second pressure sensor is used to detect the second pressure value Pb of the jaw.

[0036] In some embodiments of this application, when the controller receives and processes the locking status data, and provides voice prompts and warnings regarding the locking status, it includes:

[0037] Pre-set the minimum locking pressure threshold P1min and the maximum locking pressure threshold P1max;

[0038] Pre-set the minimum unlocking pressure threshold P2min and the maximum unlocking pressure threshold P2max;

[0039] When the position sensor reads the signal from the metal trigger point of the locking position, the first pressure value Pa and the second pressure value Pb are compared with the minimum locking pressure threshold P1min:

[0040] When P1max > Pa > P1min or P1max > Pb > P1min is satisfied, the controller determines that the device is in a locked state and does not issue a warning.

[0041] When P1max > Pa > P1min or P1max > Pb > P1min is not satisfied, the controller determines that the device is in a locking abnormal state and issues an early warning.

[0042] When the position sensor reads the signal from the metal trigger point at the unlocking position, the first pressure value Pa and the second pressure value Pb are compared with the minimum unlocking pressure threshold P2min and the maximum unlocking pressure threshold P2max:

[0043] When P2max > Pa > P2min or P2max > Pb > P2min is satisfied, the controller determines that the device is in an unlocked state and does not issue a warning.

[0044] When the conditions P2max > Pa > P2min or P2max > Pb > P2min are not met, the controller determines that the device is in an unlocking abnormal state and issues an early warning.

[0045] Compared with the prior art, the present invention has the following beneficial effects: The present invention is applicable to the extension of guide pile devices. When it is necessary to extend the guide pile, the guide pile extension device is first placed on the guide post. The locking sleeve will be in the locked position under the action of the elastic connector. After the guide pile extension device is placed on the guide post, the locking teeth will be locked on the top of the guide post. Pressing the inner sleeve will cause the inner sleeve to move downward until it reaches the unlocked position. At this time, the two grooves on the inner wall of the locking sleeve are aligned with the locking pin and the locking teeth. The locking teeth move outward under the pressure of the guide post, and the bottom top block moves upward under the action of the guide post until it fits against the bottom sleeve. Releasing the inner sleeve will cause the locking sleeve to return to the locked state under the action of the elastic connector. The locking teeth will be locked on the guide post surface under the pressure of the locking sleeve, and the locking pin will be locked on the bottom top block under the pressure of the locking sleeve. Confirm whether the device is locked and complete the installation of the guide pile extension device.

[0046] This invention is applicable to the extension of guide pile devices. By locking the guide pile extension device onto the guide post through a locking sleeve and locking assembly, the guide pile can be extended, thus solving the problems of extending guide piles under the influence of uncertain factors such as the external environment and recycling guide piles after production operations are completed. Attached Figure Description

[0047] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. In the drawings:

[0048] Figure 1 This is a schematic cross-sectional view of the overall structure of a guiding extension device for underwater pile foundations provided in an embodiment of the present invention;

[0049] Figure 2 This is a partial structural diagram of a cross-sectional view of a guiding extension device for underwater pile foundations provided in an embodiment of the present invention;

[0050] Figure 3 This is a schematic diagram of the lower part of the cross-sectional structure of a guiding extension device for underwater pile foundations provided in an embodiment of the present invention;

[0051] Figure 4A cross-sectional structural diagram of the guide screw, guide pin, and elastic connector provided in an embodiment of the present invention.

[0052] In the diagram: 1. Top connector; 2. First sealing ring; 3. Second sealing ring; 4. Inner sleeve; 5. Outer sleeve; 6. Mandrel; 7. Locking sleeve; 8. Bolt; 9. Locking pin; 10. Bottom top block; 11. Bottom sleeve; 12. Clamping tooth; 13. Guide pin; 14. Guide screw; 15. Elastic connector. Detailed Implementation

[0053] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0054] See Figure 1-4 As shown, this embodiment provides a guiding extension device for underwater pile foundations, including:

[0055] The outer sleeve 5 has an internal thread at its bottom;

[0056] The bottom sleeve 11 has an external thread on its top, and the top of the bottom sleeve 11 extends into the interior of the outer sleeve 5 and is threadedly connected to the outer sleeve 5.

[0057] Inner sleeve 4, which is disposed inside the outer sleeve 5;

[0058] The mandrel 6 is disposed inside the inner sleeve 4;

[0059] Top connector 1 is disposed inside the inner sleeve 4 and is connected to the top of the mandrel 6;

[0060] A bottom top block 10 is disposed inside the bottom sleeve, and the bottom top block 10 is connected to the bottom sleeve by bolts 8 and can move in the vertical direction;

[0061] A locking sleeve 7 is fitted onto the bottom sleeve 11, and the locking sleeve 7 is connected to the inner sleeve 4.

[0062] A sensor assembly is disposed on the locking sleeve, and the sensor assembly is used to detect locking status data;

[0063] A controller, electrically connected to the sensor assembly, is used to receive and process the locking status data to determine whether to issue an early warning.

[0064] It is understandable that the underwater pile foundation guide extension device in this embodiment exhibits excellent performance in terms of structural design, ease of installation and disassembly, locking stability, and adaptive adjustment capability, significantly improving the construction efficiency and reliability of underwater pile foundation projects. The outer sleeve 5 and the bottom sleeve 11 are connected by threads, facilitating rapid on-site installation and disassembly, thus improving work efficiency. The device is equipped with a locking sleeve 7, which is secured in the locked position by compressing the elastic connecting piece 15, ensuring that the device is firmly fixed to the guide column during operation. The bottom top block 10 can move vertically and its position can be adjusted via bolts 8, ensuring that the device can adaptively adjust according to different work requirements, enhancing the applicability of the equipment.

[0065] In one specific embodiment of this application, a first sealing ring 2 is provided between the outer sleeve 5 and the inner sleeve 4.

[0066] It is understood that the first sealing ring 2 in this embodiment, positioned between the outer sleeve 5 and the inner sleeve 4, effectively prevents water and other liquids from entering the sleeve. In underwater operating environments, it prevents water pressure from affecting the internal structure and function of the equipment, ensuring stable operation even under harsh conditions. The first sealing ring 2 prevents external substances such as mud and impurities from entering the device, avoiding wear or blockage of the inner sleeve 4, spindle 6, and other internal components, thereby extending the device's service life and reliability. Good sealing performance ensures a tight fit between the inner and outer sleeves 5, preventing loosening or detachment, thus improving the overall stability and safety of the device. During underwater operations, the device can be more firmly positioned in the designated location, less susceptible to displacement due to external forces.

[0067] In one specific embodiment of this application, the outer sleeve 5 has a lifting hole on its body; the top connector 1 has a lifting hole on its top.

[0068] Understandably, the lifting hole in this embodiment facilitates the transportation, handling, and installation of the device, allowing for easy lifting and movement using tools such as ropes or hooks. Especially in underwater environments, the lifting hole provides a safe and reliable gripping point, significantly simplifying the handling and installation process. Using the lifting hole for hoisting allows for quick positioning of the device at the designated work location, reducing the time spent on manual handling and adjustments. This not only improves work efficiency but also reduces labor intensity and saves human resources. The lifting hole provides a stable hoisting point, evenly distributing the weight of the device and preventing tilting or falling due to uneven force, thereby improving safety during operation and reducing the risk of accidents. The lifting hole also facilitates maintenance or repair. It allows for easy lifting of the device from the water or work location for necessary inspections and maintenance, ensuring the device remains in good working order. The design of the lifting hole enables convenient hoisting operations in various working environments, allowing for quick and efficient operation whether on land or underwater, making it widely applicable.

[0069] In one specific embodiment of this application, the outer bottom of the top connector 1 is provided with an external thread, the inner top of the mandrel 6 is provided with an internal thread, and the top of the mandrel 6 extends into the top of the top connector 1 and is threadedly connected to the top connector 1.

[0070] Understandably, in this embodiment, the threaded connection allows for a tight and secure connection between the top connector 1 and the mandrel 6, ensuring that they will not loosen or fall off due to external forces or vibrations during use, thereby improving the safety and stability of the device. The threaded connection makes installation and disassembly very convenient; connection or separation can be completed simply by rotating, saving time and effort and significantly improving work efficiency. The fit between the external and internal threads ensures that the mandrel 6 maintains the correct position inside the top connector 1, preventing misalignment or slippage between components, thus ensuring the stable function and performance of the device. The threaded connection itself has a certain sealing effect, preventing water and other liquids from seeping into the interior through the connection point, thereby further improving the sealing performance of the device and ensuring normal operation in underwater environments. The threaded connection makes the device more flexible when adjustments or maintenance are needed. Adjustments can be made simply by loosening or tightening the threads, without the need for special tools, simplifying the operation process and facilitating quick on-site problem handling. The threaded connection provides a high-strength mechanical bond, capable of withstanding greater tensile and compressive forces, improving the structural strength of the entire device, and making it suitable for various complex working environments and harsh working conditions.

[0071] In one specific embodiment of this application, the outer bottom of the mandrel 6 is provided with an external thread, the inner top of the bottom sleeve 11 is provided with an internal thread, and the top of the mandrel 6 extends into the top of the bottom sleeve 11 and is threadedly connected to the bottom sleeve 11.

[0072] Understandably, the design of external and internal threads in this embodiment creates a robust connection between the mandrel 6 and the bottom sleeve 11. The tight threaded connection ensures a secure connection between the mandrel 6 and the bottom sleeve 11, preventing loosening or detachment and allowing it to withstand various external forces during underwater operations. The external and internal thread design also simplifies the installation and disassembly process. Simply rotating the mandrel 6 or the bottom sleeve 11 allows for quick connection or disassembly, saving operation time and improving work efficiency. The external and internal thread connection effectively guarantees the sealing performance between the mandrel 6 and the bottom sleeve 11. The tight threaded connection prevents water and other liquids from seeping into the connection area, keeping the device's interior dry and clean, ensuring its stability and reliability. The threaded connection design is simple and practical, suitable for different specifications and models of mandrels 6 and bottom sleeves 11, improving the device's versatility and applicability. It can be easily applied in various aquatic environments and engineering projects. The robust threaded connection ensures a secure connection between the mandrel 6 and the bottom sleeve 11, preventing accidents caused by loosening during operation. This improves the safety of the underwater pile foundation guide extension device and reduces the risk of accidents.

[0073] In one specific embodiment of this application, a groove is provided on the side wall of the top connector 1, and a second sealing ring 3 is provided in the groove.

[0074] It is understood that the placement of the second sealing ring 3 within the groove on the side wall of the top connector 1 in this embodiment further enhances the sealing performance of the device. The cooperation between the second sealing ring 3 and the groove on the side wall of the top connector 1 effectively prevents water and other liquids from entering the device from the side, ensuring a tight seal during underwater operation. The second sealing ring 3 effectively prevents liquid leakage from the side of the top connector 1, avoiding device malfunctions or damage caused by liquid infiltration and ensuring the stable operation of the underwater pile foundation guide extension device. The presence of the second sealing ring 3 extends the service life of the device. The second sealing ring 3 within the groove on the side wall of the top connector 1 effectively protects the side wall of the top connector 1, reducing the erosion and damage to the connector caused by external environmental factors, thereby increasing the durability and reliability of the device. In harsh underwater working environments, the placement of the second sealing ring 3 allows the device to better adapt to different working conditions. Whether in humid, saltwater, or high-pressure underwater operations, the sealing ring within the groove effectively protects the interior of the device from external environmental influences.

[0075] In one specific embodiment of this application, the underwater pile foundation guiding extension device further includes a locking assembly, the locking assembly comprising:

[0076] The locking tooth 12 is disposed on the bottom sleeve 11;

[0077] A locking pin 9 is disposed on the bottom sleeve 11, and the locking pin 9 passes through the bottom sleeve 11 and is capable of lateral movement;

[0078] Guide screw 14, which is fixed to the locking sleeve 7 by threads;

[0079] Guide pin 13 passes through guide screw 14 and is inserted into bottom sleeve 11.

[0080] In one specific embodiment of this application, the locking assembly further includes:

[0081] An elastic connector 15 is disposed between the guide screw 14 and the bottom sleeve 11.

[0082] In one specific embodiment of this application, the locking sleeve 7 has a groove on its side wall corresponding to the position of the locking tooth 12 and the locking pin 9.

[0083] Understandably, the groove on the locking sleeve 7 in this embodiment allows for a more secure fixation of the locking teeth 12 and the locking pin 9, enhancing the stability of the locking device. When the locking teeth 12 and the locking pin 9 are in the locked state, they are fully embedded in the groove, ensuring the reliability and durability of the lock. The groove design on the locking sleeve 7 effectively reduces the risk of loosening and friction of the locking components during operation, maintaining the stability of the locked state. This helps improve the reliability and safety of the device in underwater operations. The presence of the groove on the locking sleeve 7 simplifies the operation of locking and releasing the locking device. Operators can confirm the locked state by observing whether the locking teeth 12 and the locking pin 9 are fully embedded in the groove, thereby simplifying the operation process and improving the accuracy and efficiency of the operation. The groove on the locking sleeve 7 reduces the risk of wear and damage to the locking components, thereby extending the service life of the device. The stability and durability of the locking device are improved, reducing maintenance and replacement costs.

[0084] In one specific embodiment of this application, the sensor assembly includes:

[0085] A position sensor is disposed on the locking sleeve, and the position sensor is used to detect whether the locking sleeve is in the locked position or the unlocked position;

[0086] The locking position metal trigger point is set at a position corresponding to the bottom edge of the locking sleeve in the locked state;

[0087] The unlocking position metal trigger point is set at the position corresponding to the bottom edge of the locking sleeve in the unlocked state.

[0088] In one specific embodiment of this application, the sensor assembly further includes:

[0089] A first pressure sensor is disposed at the position where the locking pin contacts the bottom top block, and the first pressure sensor is used to detect a first pressure value Pa of the locking pin;

[0090] The second pressure sensor is located at the position where the jaw contacts the guide post, and the second pressure sensor is used to detect the second pressure value Pb of the jaw.

[0091] In one specific embodiment of this application, when the controller receives and processes the locking status data, and provides voice prompts and warnings regarding the locking status, it includes:

[0092] Pre-set the minimum locking pressure threshold P1min and the maximum locking pressure threshold P1max;

[0093] Pre-set the minimum unlocking pressure threshold P2min and the maximum unlocking pressure threshold P2max;

[0094] When the position sensor reads the signal from the metal trigger point of the locking position, the first pressure value Pa and the second pressure value Pb are compared with the minimum locking pressure threshold P1min:

[0095] When P1max > Pa > P1min or P1max > Pb > P1min is satisfied, the controller determines that the device is in a locked state and does not issue a warning.

[0096] When P1max > Pa > P1min or P1max > Pb > P1min is not satisfied, the controller determines that the device is in a locking abnormal state and issues an early warning.

[0097] When the position sensor reads the signal from the metal trigger point at the unlocking position, the first pressure value Pa and the second pressure value Pb are compared with the minimum unlocking pressure threshold P2min and the maximum unlocking pressure threshold P2max:

[0098] When P2max > Pa > P2min or P2max > Pb > P2min is satisfied, the controller determines that the device is in an unlocked state and does not issue a warning.

[0099] When the conditions P2max > Pa > P2min or P2max > Pb > P2min are not met, the controller determines that the device is in an unlocking abnormal state and issues an early warning.

[0100] It is understood that in this embodiment, a position sensor is installed on the locking sleeve to detect whether the locking sleeve is in the locked or unlocked position, thereby enabling real-time monitoring of the locking status. By setting metal trigger points for the locking and unlocking positions, the position of the locking sleeve can be accurately determined, thus accurately judging the locking status of the device. A first pressure sensor is installed at the contact point between the locking pin and the bottom block to detect the first pressure value Pa of the locking pin. A second pressure sensor is installed at the contact point between the locking jaw and the guide post to detect the second pressure value Pb of the locking jaw. The pressure sensors provide accurate pressure data to help determine whether the locking pin and locking jaw are in normal working condition. The controller receives data from the position and pressure sensors for real-time monitoring and processing. Through preset locking and unlocking pressure threshold ranges, the controller can intelligently determine the current status of the device. When the device is in an abnormal locking or unlocking state, the controller can immediately issue a warning to avoid potential dangers.

[0101] When the position sensor reads the signal from the metal trigger point at the locking position, the controller compares the first pressure value Pa and the second pressure value Pb with the locking pressure thresholds P1min and P1max to determine if the locking state requirements are met. When the position sensor reads the signal from the metal trigger point at the unlocking position, the controller compares the first pressure value Pa and the second pressure value Pb with the unlocking pressure thresholds P2min and P2max to determine if the unlocking state requirements are met. This dual monitoring method ensures the reliability of the locking sleeve in both locking and unlocking states, improving the safety of the device. When the controller detects an abnormal locking or unlocking state, it can provide voice prompts and warnings to remind operators to check and maintain the equipment, preventing accidents. The proactive warning function improves operational safety and equipment maintenance efficiency, not only extending the reliability of the guide pile device but also ensuring the safety and stability of the device in complex environments through an intelligent monitoring and warning system.

[0102] The specific workflow of the underwater pile foundation guiding extension device in this embodiment is as follows:

[0103] This invention is applicable to the extension of guide piles. When preparing to extend the guide pile, the underwater pile foundation guide extension device is first placed on the guide column. Due to gravity, the locking sleeve 7 will squeeze the elastic connector 15. The reaction force of the elastic connector 15 will cause the locking sleeve 7 to be in the locked position. The locking sleeve 7 will squeeze the locking pin 9 and the locking tooth 12, putting them in the locked position. The locking tooth 12 will be locked on the guide column. Pressing the inner sleeve 4 will cause the inner sleeve 4 to move the locking sleeve 7 downward until it reaches the unlocked position. At this time, the groove on the locking sleeve 7 will align with the locking pin 9 and the locking tooth 12. The locking pin 9 and the locking tooth 12 will return to their free state. Due to the gravity of the guide pile extension device itself, the device will move downward. The top of the guide column will squeeze the locking tooth 12, pushing the locking tooth 12 into the groove of the locking sleeve 7 and lifting the bottom top block 10 until it fits against the bottom sleeve 11. At this time, the locking tooth 12 will be aligned with the groove profile on the guide column. Remove the pressure applied to the inner sleeve 4, and the locking sleeve 7 moves upward under the force of the elastic connector 15, returning to the locked position. The locking sleeve 7 will squeeze the retaining tooth 12, push the retaining tooth 12 onto the groove surface on the guide post, thereby locking the guide post, and push the locking pin 9 onto the bottom top block 10, thereby locking the bottom top block 10.

[0104] When it is necessary to remove the underwater pile foundation guide extension device, press the inner sleeve 4 to unlock the underwater pile foundation guide extension device, lift the underwater pile foundation guide extension device, and complete the removal.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A guiding and extending device for underwater pile foundations, characterized in that, The application relates to a locking device for a hydraulic cylinder, which comprises the following parts: an outer sleeve, the inner bottom of which is provided with internal threads; a bottom sleeve, the outer top of which is provided with external threads, and the top of the bottom sleeve extends into the inner part of the outer sleeve and is threadedly connected with the outer sleeve; an inner sleeve, which is arranged in the inner part of the outer sleeve; a mandrel, which is arranged in the inner part of the inner sleeve; a top joint, which is arranged in the inner part of the inner sleeve and is connected with the top of the mandrel; a bottom top block, which is arranged in the bottom sleeve and is connected with the bottom sleeve through bolts and can move in the vertical direction; a locking sleeve, which is sleeved on the bottom sleeve and is connected with the inner sleeve; a locking assembly, which comprises: a clamping tooth, which is arranged on the bottom sleeve; a locking pin, which is arranged on the bottom sleeve and can move laterally through the bottom sleeve; a guide screw, which is fixed on the locking sleeve through threads; a guide pin, which passes through the guide screw and is inserted into the bottom sleeve; an elastic connecting piece, which is arranged between the guide screw and the bottom sleeve; a sensor assembly, which is arranged on the locking sleeve and is used for detecting locking state data; a controller, which is electrically connected with the sensor assembly and is used for receiving and processing the locking state data and determining whether to give a pre-warning; the sensor assembly further comprises: a first pressure sensor, which is arranged at the position where the locking pin is in contact with the bottom top block and is used for detecting a first pressure value Pa of the locking pin; a second pressure sensor, which is arranged at the position where the clamping tooth is in contact with the guide column and is used for detecting a second pressure value Pb of the clamping tooth.

2. A water pile foundation guiding and extending device according to claim 1, characterized in that, A first sealing ring is arranged between the outer sleeve and the inner sleeve, a groove is arranged on the side wall of the top joint, a second sealing ring is arranged in the groove, a lifting hole is arranged on the barrel of the outer sleeve, and a lifting hole is arranged on the top of the top joint.

3. A water pile foundation guiding and extending device according to claim 2, characterized in that, The outer bottom of the top joint is provided with external threads, the inner top of the mandrel is provided with internal threads, and the bottom of the mandrel extends into the top of the top joint and is threadedly connected with the top joint.

4. A water pile foundation guiding and extending device according to claim 3, characterized in that, The outer bottom of the mandrel is provided with external threads, the inner top of the bottom sleeve is provided with internal threads, and the top of the mandrel extends into the top of the bottom sleeve and is threadedly connected with the bottom sleeve.

5. A water pile foundation guiding and extending device according to claim 4, characterized in that, The locking sleeve is provided with a groove on the side wall at the positions corresponding to the clamping tooth and the locking pin.

6. A water pile foundation guiding and extending device according to claim 5, characterized in that, The sensor assembly comprises: a position sensor, which is arranged on the locking sleeve and is used for detecting whether the locking sleeve is in a locking position or an unlocking position; a locking position metal trigger point, which is arranged at the position corresponding to the bottom edge of the locking sleeve in the locking state; an unlocking position metal trigger point, which is arranged at the position corresponding to the bottom edge of the locking sleeve in the unlocking state.

7. A water pile foundation guiding and extending device according to claim 6, characterized in that, When the controller receives and processes the locking state data and gives a locking state voice prompt and a pre-warning, the following steps are included: a locking pressure minimum threshold P1min and a locking pressure maximum threshold P1max are set in advance. Pre-set the unlocking pressure minimum threshold P2min and the unlocking pressure maximum threshold P2max; When the position sensor reads the signal of the locking position metal trigger point, compare the first pressure value Pa and the second pressure value Pb with the locking pressure minimum threshold P1min: When P1max>Pa>P1min or P1max>Pb>P1min is met, the controller determines that the device is in the locking state, and no pre-warning is performed; When P1max>Pa>P1min or P1max>Pb>P1min is not met, the controller determines that the device is in the locking abnormal state, and pre-warning is performed; When the position sensor reads the signal of the unlocking position metal trigger point, compare the first pressure value Pa and the second pressure value Pb with the unlocking pressure minimum threshold P2min and the unlocking pressure maximum threshold P2max: When P2max>Pa>P2min or P2max>Pb>P2min is met, the controller determines that the device is in the unlocking state, and no pre-warning is performed; When P2max>Pa>P2min or P2max>Pb>P2min is not met, the controller determines that the device is in the unlocking abnormal state, and pre-warning is performed.

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