Device for improving operation stability of deep sea rock-soil exploration equipment and installation method thereof

Abstract

The invention discloses a device for improving operation stability of deep-sea rock-soil exploration equipment and an installation method thereof.The device comprises a power system and a stabilizing frame, the stabilizing frame is arranged at the bottom of a base of the exploration equipment and comprises a hard framework capable of being unfolded outwards in the circumferential direction, and a flexible film capable of being unfolded and tightened along with unfolding of the hard framework is arranged on the hard framework; flexible sealing circular rings are respectively arranged on the outer edge of the hard framework and the bottom of the exploration equipment base and positioned on the inner side of the hard framework; a closed cavity can be formed between the exploration equipment base, the hard framework, the flexible film and the two flexible sealing rings and the seabed; the power system drives the hard framework to expand outwards in the circumferential direction and sucks the closed cavity to form negative pressure; the exploration equipment and the seabed soil body are fixed through the micro piles, then grouting reinforcement is conducted on the soil body around the micro piles through the grouting system, and finally the reaction frame structure is formed. The operation stability of the exploration equipment on the seabed can be remarkably enhanced, the applicability is high, and the cost is low.

Description

Technical Field

[0001] This invention relates to auxiliary devices for deep-sea rock and soil exploration, specifically to a device and its installation method for improving the operational stability of deep-sea rock and soil exploration equipment. Background Technology

[0002] In recent years, with the rapid development of projects such as submarine tunnels and cross-sea passages, seabed oil and gas resource development, offshore wind farm construction, deep-sea resource exploration, marine scientific research, and geological disaster early warning, the demand for deep-sea geotechnical exploration has been increasing. However, in extreme marine environments, deep-sea geotechnical exploration equipment still faces technical challenges such as insufficient stability and high operating costs. For example, soft sediments can easily cause equipment to sink and slip, and steep terrain may lead to instability risks. Furthermore, during drilling, the equipment needs to provide sufficient reaction force to maintain drilling stability. Currently, most deep-sea geotechnical exploration equipment uses rigid truss reaction frame structures to enhance operational stability, which has certain requirements on the seabed bearing surface and has poor applicability. In addition, there is also the problem of high cost. Summary of the Invention

[0003] Purpose of the invention: The first purpose of the invention is to provide a device that is highly applicable and low in cost to improve the operational stability of deep-sea rock and soil exploration equipment; the second purpose of the invention is to provide an installation method for the device.

[0004] Technical Solution: The present invention provides a device for improving the operational stability of deep-sea rock and soil exploration equipment, comprising a power system and a stabilizing frame. The stabilizing frame is disposed at the bottom of the exploration equipment base and includes a rigid frame capable of circumferentially expanding outward. A flexible membrane capable of unfolding and tightening as the rigid frame is deployed is disposed on the rigid frame. Flexible sealing rings are respectively disposed on the outer edge of the rigid frame and at the bottom of the exploration equipment base located on the inner side of the rigid frame. The exploration equipment base, rigid frame, flexible membrane, and two flexible sealing rings can form a closed cavity with the seabed. The power system is disposed at the top of the exploration equipment base and is used to drive the rigid frame to expand circumferentially outward and to draw the closed cavity to form a negative pressure.

[0005] Furthermore, the rigid skeleton includes several rigid skeleton units that are circumferentially distributed around the central axis of the exploration equipment and can be deployed outwards; the power system includes a power actuator and a vacuum pumping device, each corresponding to one of the rigid skeleton units. The power actuator is used to drive the corresponding rigid skeleton unit to deploy outwards, and the suction pipe of the vacuum pumping device is connected to the closed cavity.

[0006] Furthermore, the power actuator includes a motor, and the rigid frame unit includes several sequentially connected rods. The connection nodes adopt hinged supports with torsion springs and buckles. The beginning of the first rod is hinged to the outer edge of the exploration equipment base by the hinged support with torsion springs and buckles. The end of the last rod is fixedly connected to a flexible sealing ring. The output end of the motor is provided with a winding mechanism, on which a wire rope / chain is wound. The other end of the wire rope / chain passes over a fixed pulley set on the exploration equipment base and becomes horizontal. It then passes through each rod in sequence and is fixedly connected to the end of the last rod.

[0007] Furthermore, the power actuator also includes a hydraulic lock for locking the wire rope / chain.

[0008] Furthermore, the rigid skeleton unit is provided with a mounting clip, and the flexible film is provided with a reinforcing edge adapted to the mounting clip. The reinforcing edge is placed on the mounting clip and locked by fasteners.

[0009] Furthermore, several micropiles are evenly arranged circumferentially on the base of the exploration equipment. Each micropile corresponds to a power actuator, and the micropiles are located inside the flexible sealing ring at the bottom of the exploration equipment base. The power actuator includes a power unit. The surface of the micropiles is distributed with threads and is pre-arranged vertically in the corresponding power unit in a threaded manner. The power unit can rotate and press the micropiles into the seabed soil.

[0010] Furthermore, the device for improving the operational stability of deep-sea rock and soil exploration equipment also includes a grouting system installed on the top of the exploration equipment base, with each grouting system corresponding to a power actuator; the micropile is hollow inside and has holes at the lower end; the grouting system is used to grout and reinforce the soil around the micropile.

[0011] Furthermore, the flexible sealing ring on the outer edge of the rigid skeleton is connected to the outer edge of the flexible film; another flexible sealing ring is fixed to the bottom of the exploration equipment base by a continuous bolt plate structure or high-strength adhesive.

[0012] Furthermore, the cross-section of the flexible sealing ring is an inverted triangle, with the apex of the triangle forming a "cutting edge" used to cut into seabed sediments under negative pressure.

[0013] The present invention discloses an installation method for a device to improve the operational stability of deep-sea rock and soil exploration equipment, comprising:

[0014] (1) Transport the device for improving the operational stability of deep-sea rock and soil exploration equipment to the designated exploration site and hoist and sink it;

[0015] (2) During the sinking process, the rigid skeleton is expanded outward in a circumferential direction;

[0016] (3) After sinking to the seabed, vacuum is applied to the closed cavity formed between the exploration equipment base, rigid frame, flexible membrane, two flexible sealing rings and the seabed.

[0017] (4) Rotate and press each micropile into the seabed soil;

[0018] (5) Grouting is carried out to reinforce the soil around each micro-piles.

[0019] Beneficial Effects: Compared with existing technologies, this invention has the following significant advantages: The stabilizing frame can provide a large support area, significantly reducing ground pressure and preventing exploration equipment from sinking. Simultaneously, utilizing the immense hydrostatic pressure of the deep-sea environment as a power source, a pressure differential is created through negative pressure suction, generating pull-out force far exceeding the self-weight of the exploration equipment, improving its resistance to overturning and slippage. Furthermore, this device is suitable for rock formations and sandy soils, especially for bottom environments with extremely low bearing capacity such as deep-sea mud and clay, demonstrating broad foundation applicability. Additionally, this device is less expensive than traditional rigid reaction frames, and its installation process is simple and convenient. In summary, this invention provides an efficient and reliable solution for deep-sea rock and soil exploration. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the undeployed structure of a device for improving the operational stability of deep-sea rock and soil exploration equipment, provided in an embodiment of the present invention.

[0021] Figure 2 yes Figure 1 Lower cross-sectional view of the device shown;

[0022] Figure 3 This is a schematic diagram of the cooperation structure between the power system and the stabilizer in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram illustrating the working principle of the hinged support in an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the unfolded first member in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the unfolded second rod in an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram showing the unfolded arrangement of the third and fourth rods in an embodiment of the present invention;

[0027] Figure 8 This is an exploded view of the stabilizer in the deployed state in an embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the deployed state structure of a device for improving the operational stability of deep-sea rock and soil exploration equipment, provided in an embodiment of the present invention.

[0029] Figure 10 yes Figure 9 Lower cross-sectional view of the device shown;

[0030] Figure 11 This is a cross-sectional view showing the initial formation of a seal in an embodiment of the present invention;

[0031] Figure 12 This is a cross-sectional view of the device after negative pressure adsorption and fixation in an embodiment of the present invention;

[0032] Figure 13 This is a cross-sectional view after grouting in an embodiment of the present invention. Detailed Implementation

[0033] The invention will now be further described with reference to the accompanying drawings.

[0034] Appendix Figures 1 to 13 The accompanying figure labels are as follows:

[0035] 1. Power system; 11. Power actuator; 111. Motor; 112. Wire rope / chain; 113. Fixed pulley; 114. Hydraulic lock; 115. Power unit; 12. Vacuum pumping device; 15. Micropile;

[0036] 2. Grouting system;

[0037] 3. Stabilizer; 31. Rigid frame; 3111 / 3113 / 3115 / 3117. Hinge support; 3112. First member; 3114. Second member; 3116. Third member; 3118. Fourth member; 313. Mounting strip; 32. Flexible membrane; 321. Reinforcing edge; 33. Flexible sealing ring;

[0038] 4. Exploration equipment.

[0039] Example 1: As Figure 1 and Figure 2 As shown, Embodiment 1 provides a device for improving the operational stability of deep-sea geotechnical exploration equipment, including a power system 1, a grouting system 2, a stabilizing frame 3, and micropiles 15. The power system 1 and grouting system 2 are located at the top of the base of the exploration equipment 4, and the stabilizing frame 3 is located at the bottom of the base of the exploration equipment 4. The exploration equipment 4 can be, for example, a subsea drilling rig, a static cone penetrometer, or other deep-sea geotechnical exploration equipment.

[0040] Combination Figure 9 and Figure 10The stabilizing frame 3 includes a rigid frame 31 capable of circumferentially expanding outwards. A flexible membrane 32, which unfolds and tightens as the rigid frame 31 expands, is mounted on the rigid frame 31. Flexible sealing rings 33 are respectively installed on the outer edge of the rigid frame 31 and on the bottom of the exploration equipment 4 base, located inside the rigid frame 31. The exploration equipment 4 base, rigid frame 31, flexible membrane 32, and two flexible sealing rings 33 form a closed cavity with the seabed. The power system 1 drives the rigid frame 31 to expand circumferentially outwards and draws negative pressure from the closed cavity to provide a reaction force for the exploration equipment 4. Based on this, micropiles 15 are used to fix the exploration equipment 4 to the seabed soil. Then, the grouting system 2 reinforces the soil around the micropiles 15 through grouting, ultimately forming a reaction frame structure.

[0041] Combination Figures 3 to 8 In this embodiment, the rigid skeleton 31 includes eight rigid skeleton units that are circumferentially distributed around the central axis of the exploration equipment 4 and can be deployed outwards. The power system 1 includes a power actuator 11 and a vacuum pumping device 12. The power actuator 11 and the vacuum pumping device 12 correspond one-to-one with the rigid skeleton units. The power actuator 11 is used to drive the corresponding rigid skeleton unit to deploy outwards, and the vacuum pumping device 12 is used to evacuate the closed cavity.

[0042] Specifically, the power actuator 11 includes a motor 111, a hydraulic lock 114, and a power unit 115. The rigid frame unit has four rods and four hinged supports. The first rod 3112 is hinged at its starting end to the outer edge of the base plate of the exploration equipment 4 via a hinged support 3111 with a torsion spring and a buckle. The end of the first rod 3112 is connected to the starting end of the second rod 3114 via a hinged support 3113 with a torsion spring and a buckle. The end of the second rod 3114 is connected to the starting end of the third rod 3116 via a hinged support 3115 with a torsion spring and a buckle. The end of the third rod 3116 is connected to the starting end of the fourth rod 3118 via a hinged support 3117 with a torsion spring and a buckle. The end of the fourth rod 3118 is fixedly connected to the flexible sealing ring 33.

[0043] The output end of the motor 111 is provided with a winding mechanism, on which a wire rope / chain 112 is wound. The other end of the wire rope / chain 112 passes through the hydraulic lock 114, then passes around the fixed pulley 113 set on the base of the exploration equipment 4, and then passes through the first rod 3112, the second rod 3114, the third rod 3116 and the fourth rod 3118 in sequence, and is fixedly connected to the end of the fourth rod 3118.

[0044] During deployment, motor 111 starts, driving wire rope / chain 112 to move. Wire rope / chain 112 passes over fixed pulley 113, moving in the desired horizontal direction. As wire rope / chain 112 tensions, the latch inside the hinge support that prevents the torsion spring from releasing breaks, causing the torsion spring to release instantaneously and pushing the hinge to unfold. When the member is unfolded to a horizontal position, the latch on the back of the hinge support engages, balancing the overall force and keeping the member horizontal, preventing it from bending backward (e.g., ...). Figure 4 (b) As shown). To retract, further tighten the wire rope / chain 112, forcefully break the buckle on the back of the hinge support, and tighten the wire rope / chain 112 to retract the rigid frame unit (as shown). Figure 4 (c) shows the flexible film 32. The hinged support with torsion spring and buckle described in this embodiment is a very mature technology and is existing technology.

[0045] As each rigid frame unit unfolds, it causes the connected flexible membrane 32 to expand and eventually tension. Once the rigid frame unit is fully extended, the hydraulic lock 114 activates, locking the current position of the wire rope / chain 112. This effectively counteracts any potential retraction caused by external loads, and the tension of the wire rope / chain 112 further enhances the stability of the rigid frame unit, thus forming a stable support frame from all rigid frame units. The hydraulic lock 114 achieves locking through its internal ratchet and pawl mechanism or spring-loaded locating pin mechanism, which is existing technology.

[0046] The rigid frame unit is made of lightweight, high-strength, and corrosion-resistant aluminum alloy, with an I-shaped cross-section to enhance bending stiffness. The flexible membrane 32 is connected to the rigid frame 31 by mechanical clamping, ensuring smooth unfolding when the frame 32 is deployed and full tension after being in place, while also ensuring effective transmission of driving force and allowing for fine-tuning during operation.

[0047] Specifically, such as Figure 8As shown, a continuous mounting strip 313 is fixedly installed along its entire radial length on the upper surface of the rigid frame unit. This mounting strip 313 is designed as a metal strip with mounting holes. The flexible film 32 is provided with a reinforcing edge 321 adapted to the mounting strip 313. This reinforcing edge 321 can be achieved by sewing or heat-sealing a layer of higher-strength fabric to prevent tearing. The reinforcing edge 321 of the flexible film 32 is placed on the mounting strip 313 of the rigid frame unit. A clamping profile (e.g., a grooved aluminum profile) matching the cross-section of the mounting strip 313 is placed over the reinforcing edge 321. Another matching clamping profile is then used to lock it together using multiple fastening screws. The fastening screws are arranged radially at certain intervals (e.g., one every 100 mm), passing sequentially through the clamping profile, the reinforcing edge 321, and finally screwed into the threaded hole of the mounting strip 313. At critical stress points such as both ends of the clamping area, an additional heat-sealing process can be used to locally fuse the flexible film 32 with the clamping strip / profile to provide redundant connection strength. During tightening, the reinforcing edge 321 is not completely locked, allowing for a small sliding allowance within the clamping pair. This allows the flexible film 32 to undergo slight deformation and displacement under enormous pressure during the negative pressure adsorption stage, better conforming to the uneven seabed and ensuring a sealing effect. In this embodiment, the flexible film 32 is made of a high-strength, airtight composite material, such as polyurethane-coated reinforced fiber cloth or synthetic rubber with internal reinforcing ribs.

[0048] Several micropiles 15 are evenly spaced circumferentially on the base of the exploration equipment 4. Each micropile 15 corresponds one-to-one with a power actuator 11, and the micropiles 15 are located inside the flexible sealing ring 33 set at the bottom of the exploration equipment 4 base. The micropiles 15 have threads distributed on their surfaces and are pre-arranged vertically in the corresponding power units 115 with a threaded engagement. The power units 115 can rotate and press the micropiles 15 into the seabed soil. The engagement between the micropiles 15 and the power units 115 is similar to that of a lead screw and lead screw nut; that is, when the power units 115 rotate, the micropiles 15 rotate and move downwards based on the threaded engagement. Initially, the lower end of the micropiles 15 is slightly below the flexible membrane but not enough to touch the bottom.

[0049] The grouting system 2 corresponds one-to-one with the power actuator 11. The micropile 15 is hollow inside with a hole at the lower end; the grouting system 2 is used to grout and reinforce the soil around the micropile 15. The grouting system 2 mainly consists of a grout storage unit, a pumping device, a pressure control valve, and a delivery pipeline, and is existing technology.

[0050] The flexible sealing ring 33 on the outer edge of the rigid skeleton 31 is connected to the outer edge of the flexible film 32. Specifically, the outer edge of the flexible film 32 wraps around the outer ring joint surface of the flexible sealing ring 33, and a high-frequency heat sealing machine is used to make a seamless connection along the entire circumference, and edge locking reinforcement treatment is performed (such as secondary heat sealing after folding back), forming a full circumferential, uninterrupted sealing band, ensuring that the flexible film 32, the flexible sealing ring 33 and the seabed form a sealed space during the subsequent negative pressure adsorption and fixing stage, grouting reinforcement and reaction frame structure formation stage.

[0051] Another flexible sealing ring 33 is fixed to the bottom of the exploration equipment 4 base by a continuous bolt plate structure or high-strength adhesive. Its fixed position is precisely designed to be located on the outside of the micropile 15 to ensure that it does not interfere with the moving parts and to leave room for the micropile 15 to operate.

[0052] The flexible sealing ring 33 has an inverted triangular cross-section, with the apex forming a "cutting edge" used to cut into seabed sediments under negative pressure to achieve initial sealing. The material used for the flexible sealing ring 33 must meet the requirements of circumferential flexibility, allowing it to bend, unfold, and tension following the folding of the rigid frame 31, and to adapt to uneven seabed conditions. The flexible sealing ring 33 needs a certain degree of stiffness in the vertical direction to ensure smooth insertion of the ring foot into the seabed. In this embodiment, to achieve a balance between "circumferential flexibility" and "vertical stiffness" and to adapt to the harsh deep-sea environment, the flexible sealing ring 33 can be made of a high-performance plastic polymer encapsulating a series of independent steel sheets in a composite structure.

[0053] To achieve a tight bond between the stabilizing frame 3 and the seabed, this invention employs a vacuum pumping device 12, the same number as the micropillars 115, to extract residual seawater and gas from the cavity between the flexible membrane 32 and the seabed. Specifically, the vacuum pumping device 12 is installed on the base of the exploration equipment 4, matching the number of rigid frame units. The suction pipe of the vacuum pumping device 12 is composed of multiple radially branched pipes connected to the cavity below the rigid frame unit. These flexible branched pipes can be embedded and fixed in the "I"-shaped grooves of the rigid frame 31, thus being protected and kept clean, avoiding entanglement or interference during deployment.

[0054] When the suction operation starts, all vacuum pumps operate simultaneously, drawing out the seawater and gas mixture from the cavity. This mixture is then discharged directly into the external marine environment through the top discharge port of the vacuum pumps. As the medium inside the cavity is continuously extracted, the cavity pressure drops rapidly, while the constant static pressure of the external seawater creates a downward net pressure difference. This pressure difference acts as a powerful equivalent load, pushing the entire stabilizing frame and its flexible membrane into close and uniform contact with the seabed surface. This generates enormous downward vertical pressure on the membrane, providing a stable and reliable reaction force foundation for the overhead equipment (such as subsea drilling rigs).

[0055] The device provides pull-out resistance Horizontal resistance and overturning moment They are respectively:

[0056]

[0057]

[0058]

[0059] in, Net pressure difference; such as Figure 10 As shown, The outer radius of the bottom of exploration equipment 4. The inner radius of the bottom of exploration equipment 4; The number of micropillars is 15; For the first The side friction resistance enhancement coefficient after grouting of micro pile 15 ; For the first Standard value of side friction resistance of soil on sidewall of micropile 15; For the first The area of ​​the outer side of the micro-pillar 15 in contact with the soil. The buoyancy of exploration equipment 4; The coefficient of friction between the stabilizer 3 and the foundation soil; For the first The horizontal soil resistance enhancement coefficient after grouting of micro pile 15; For the first The horizontal soil resistance of micropile 15; For the first The area of ​​the micro-pillar 15 resisting the horizontal projection direction of the soil; For the first The distance between micro-pillar 15 and the center axis of exploration equipment 4.

[0060] The above pull-out force Horizontal resistance and overturning moment It is strong enough to withstand the huge overturning moment and vertical reaction force generated when exploration equipment (such as drill bits) is operating, and to prevent the exploration equipment from slipping, tilting, being lifted or sinking into the mud.

[0061] In summary, the device significantly reduces the ground pressure and greatly improves the operational stability of the exploration equipment 4 on the deep seabed through the synergistic effect of three mechanisms: expanding the bottom area, negative pressure adsorption, and soil grouting reinforcement.

[0062] Example 2: Example 2 provides an installation method for the device described in Example 1 for improving the operational stability of deep-sea rock and soil exploration equipment, comprising the following steps:

[0063] (1) Transport the device that improves the operational stability of deep-sea rock and soil exploration equipment to the designated exploration site and hoist it down.

[0064] (2) During the sinking process, the rigid skeleton 31 is expanded outward in a circumferential direction.

[0065] When the exploration equipment 4 is lowered to a certain height close to the seabed, the power actuator 11 is activated, and all rigid frame units expand outward synchronously and smoothly, causing the flexible film 32 pre-connected to it to unfold and tighten; after the entire stabilizing frame 3 is unfolded, it is locked to form a stable support frame.

[0066] (3) After sinking to the seabed, vacuum is applied to the closed cavity formed between the exploration equipment 4 base, rigid frame 31, flexible membrane 32, two flexible sealing rings 33 and the seabed.

[0067] like Figure 11 As shown, under its own weight, part 3 of the stabilizing frame contacts the seabed; at this time, the ring foot of the flexible sealing ring 33 inserts into the seabed, forming a preliminary seal. Figure 12 As shown, the vacuum device 12 is activated to draw out the residual seawater and gas in the cavity between the flexible membrane 32 and the seabed, causing the cavity pressure to drop rapidly. Under the condition that the static pressure of the external seawater remains unchanged, a net pressure difference is formed, which pushes the stabilizing frame 3 into close contact with the seabed, thereby generating pressure on the flexible membrane 32 and providing a reliable reaction force for the exploration equipment 4 above.

[0068] (4) Rotate each micropile 15 into the seabed soil.

[0069] like Figure 13 As shown, the power unit 115 rotates, pressing the micropile 15 into the seabed soil.

[0070] (5) Grouting is carried out to reinforce the soil around each micropile 15.

[0071] The grouting system 2 is activated, injecting reinforcing grout into the surrounding soil through micropiles 15 to achieve secondary reinforcement of the working base area; ultimately forming a comprehensive reaction frame structure that combines negative pressure adsorption and soil improvement.

Claims

1. A device for improving the operational stability of deep-sea rock and soil exploration equipment, characterized in that, The device includes a power system (1) and a stabilizing frame (3). The stabilizing frame (3) is located at the bottom of the exploration equipment (4) base and includes a rigid frame (31) that can expand outward in a circumferential direction. A flexible membrane (32) that can be unfolded and stretched as the rigid frame (31) is provided on the rigid frame (31). Flexible sealing rings (33) are respectively provided on the outer edge of the rigid frame (31) and at the bottom of the exploration equipment (4) base located on the inner side of the rigid frame (31). The exploration equipment (4) base, the rigid frame (31), the flexible membrane (32) and the two flexible sealing rings (33) can form a closed cavity with the seabed. The power system (1) is located at the top of the exploration equipment (4) base and is used to drive the rigid frame (31) to expand outward in a circumferential direction and to draw the closed cavity to form a negative pressure.

2. The device for improving the operational stability of deep-sea rock and soil exploration equipment according to claim 1, characterized in that, The rigid skeleton (31) includes several rigid skeleton units that are evenly distributed around the central axis of the exploration equipment (4) and can be deployed outward; the power system (1) includes a power actuator (11) and a vacuum pumping device (12). The power actuator (11) and the vacuum pumping device (12) are respectively corresponding to the rigid skeleton units. The power actuator (11) is used to drive the corresponding rigid skeleton unit to deploy outward, and the suction pipe of the vacuum pumping device (12) is connected to the closed cavity.

3. The device for improving the operational stability of deep-sea rock and soil exploration equipment according to claim 2, characterized in that, The power actuator (11) includes a motor (111). The rigid frame unit includes several sequentially connected rods. The connection nodes adopt hinged supports with torsion springs and buckles. The beginning of the first rod is hinged to the outer edge of the base of the exploration equipment (4) by the hinged support with torsion springs and buckles. The end of the last rod is fixedly connected to the flexible sealing ring (33). The output end of the motor (111) is provided with a winding mechanism. A wire rope / chain (112) is wound on the winding mechanism. The other end of the wire rope / chain (112) passes around the fixed pulley (113) set on the base of the exploration equipment (4) and becomes horizontal. Then it passes through each rod in sequence and is fixedly connected to the end of the last rod.

4. The device for improving the operational stability of deep-sea rock and soil exploration equipment according to claim 3, characterized in that, The power actuator (11) also includes a hydraulic lock (114) for locking the wire rope / chain (112).

5. The device for improving the operational stability of deep-sea rock and soil exploration equipment according to claim 3, characterized in that, The rigid frame unit is provided with a mounting clip (313), and the flexible film (32) is provided with a reinforcing edge (321) adapted to the mounting clip (313). The reinforcing edge (321) is placed on the mounting clip (313) and locked by fasteners.

6. The device for improving the operational stability of deep-sea rock and soil exploration equipment according to claim 2, characterized in that, Several micropiles (15) are evenly arranged along the circumference on the base of the exploration equipment (4). Each micropile (15) corresponds to a power actuator (11), and the micropiles (15) are located inside the flexible sealing ring (33) set at the bottom of the base of the exploration equipment (4). The power actuator (11) includes a power unit (115). The surface of the micropiles (15) is distributed with threads and is arranged vertically in the corresponding power unit (115) in a threaded manner. The power unit (115) can rotate and press the micropiles (15) into the seabed soil.

7. The device for improving the operational stability of deep-sea rock and soil exploration equipment according to claim 6, characterized in that, It also includes a grouting system (2) set on the top of the base of the exploration equipment (4), and the grouting system (2) corresponds one-to-one with the power actuator (11); the micro pile (15) is hollow inside and has holes at the bottom; the grouting system (2) is used to grout and reinforce the soil around the micro pile (15).

8. The device for improving the operational stability of deep-sea rock and soil exploration equipment according to claim 1, characterized in that, The flexible sealing ring (33) on the outer edge of the rigid skeleton (31) is connected to the outer edge of the flexible film (32); another flexible sealing ring (33) is fixed to the bottom of the exploration equipment (4) base by a continuous bolt plate structure or high-strength adhesive.

9. The device for improving the operational stability of deep-sea rock and soil exploration equipment according to claim 1, characterized in that, The cross-section of the flexible sealing ring (33) is an inverted triangle, and the tip of the triangle forms a "cutting edge" for cutting into seabed sediments under negative pressure.

10. A method for installing a device to improve the operational stability of deep-sea rock and soil exploration equipment, characterized in that, include: (1) Transport the device for improving the operational stability of deep-sea rock and soil exploration equipment to the designated exploration site and hoist and sink it; (2) During the sinking process, the rigid skeleton (31) is expanded outward in a circumferential direction; (3) After sinking to the seabed, vacuum is applied to the base of the exploration equipment (4), the rigid frame (31), the flexible membrane (32), the two flexible sealing rings (33) and the closed cavity between the seabed. (4) Rotate and press each micropile (15) into the seabed soil; (5) Grouting is carried out to reinforce the soil around each micropile (15).

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