A suction anchor for water injection recovery and construction method thereof
By designing the extension and expansion structure of the bladder body in the suction anchor, the problems of soil disturbance and seepage damage during anchor removal are solved, and the smooth extraction and recycling of the suction anchor is achieved.
Patent Information
- Application Number
- CN202211341382.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-10-27
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2042-10-27
AI Technical Summary
When the existing suction anchor is pulled, the soil in the anchor barrel is disturbed due to injecting water or air, causing seepage damage, and the purpose of smoothly pulling out the suction anchor cannot be achieved.
A suction anchor for water injection recovery is designed, using a combination of anchor barrel structure and a capsule body. The capsule body extends downward and expands when pulling the anchor. The bottom plate contacts the seabed to produce a squeeze effect, and lifts the anchor barrel structure to avoid soil disturbance.
Through the expansion and expansion design of the bladder body, a sufficient pressure difference is formed between the inside and outside of the anchor barrel structure, the smooth pulling of the suction anchor is achieved and the soil seepage damage is avoided.
Smart Images
Figure CN115489668B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of suction anchors, and in particular to a suction anchor for water injection recovery and a construction method thereof. Background Art
[0002] With the large-scale development of offshore wind power and offshore oil and gas projects, the supporting marine engineering equipment is required to be quickly upgraded and transformed. Among them, suction anchors have gradually become important equipment in marine engineering due to their good pull-out resistance, convenient construction, and recyclability.
[0003] Normally, a suction anchor is a steel cylinder with a closed top and an open bottom, standing upright on the seabed and embedded in the soil. After the water body in the anchor cylinder is closed, water is pumped out with the help of the pump on the top cover to reduce the internal pressure; when the downward pressure generated by the pressure difference between the inside and outside of the anchor cylinder is greater than the friction resistance of the side wall of the anchor cylinder, the anchor cylinder will continue to press into the soil until the anchor is sunk. When the pressure difference between the inside and outside of the anchor cylinder gradually disappears and the pressure inside the cylinder returns to the ambient pressure, the mooring connection can be made. When pulling the anchor, the pump can be made to work in reverse, so that the internal pressure of the anchor cylinder is greater than the external pressure, and the upward pressure acting on the top cover is greater than the friction resistance of the side wall of the anchor cylinder, so that the anchor cylinder can be "lifted" out of the soil.
[0004] The above-mentioned existing anchor extraction method is to inject water or air into the anchor barrel to offset the friction resistance of the external soil. However, the injection of water or air will disturb the soil in the anchor barrel, causing seepage damage to the soil in the barrel, and ultimately causing a sharp drop in the pressure inside the anchor barrel, making it impossible to achieve the purpose of smoothly extracting the suction anchor. Summary of the invention
[0005] In order to solve the above problems, the purpose of the present invention is to provide a suction anchor for water injection recovery and a construction method thereof, so as to solve the problem that the injection of water or air will disturb the soil in the anchor tube, resulting in seepage destruction of the soil in the tube, and ultimately causing a sharp drop in the internal pressure of the anchor tube, making it impossible to smoothly pull out the suction anchor.
[0006] The technical solution of the suction anchor for water injection recovery of the present invention is:
[0007] The suction anchor for water injection recovery includes an anchor barrel structure and a bladder, wherein the anchor barrel structure includes a cylindrical barrel and a top cover plate, wherein the lower portion of the cylindrical barrel is open, and the top cover plate is fixedly connected to the upper portion of the cylindrical barrel; a suction cavity is provided inside the anchor barrel structure, and the bladder is accommodated and installed in the suction cavity;
[0008] The top cover plate is provided with an injection port and a water extraction port, the bladder body is connected to the lower side of the top cover plate, and the bladder body is communicated with the injection port, and the water extraction port is communicated with the suction chamber;
[0009] A bottom plate is provided at the lower part of the bladder body, a discharge valve is installed on the bottom plate, and a fixing piece is also provided inside the bladder body, and the fixing piece is detachably connected between the injection port and the bottom plate of the bladder body;
[0010] When anchoring, the fixing member is used to limit the bottom plate of the bladder so that the bladder is in an upwardly compressed state; when anchoring, the fixing member is released to release the bottom plate of the bladder, and fluid is injected into the bladder so that the bladder can stretch and expand downward.
[0011] Furthermore, two sacs are provided, and the two sacs are arranged side by side in the suction chamber, and the expansion and contraction directions of the two sacs are extended along the axial direction of the cylindrical barrel.
[0012] Furthermore, the outline shape of the cylindrical body is cylindrical, the outline shapes of the two capsules are both semi-cylindrical, and the two capsules are symmetrically arranged with respect to the axial section of the cylindrical body;
[0013] The two capsules are respectively a first capsule and a second capsule. The two injection ports are respectively a first injection port and a second injection port. The first capsule is connected to the first injection port, and the second capsule is connected to the second injection port.
[0014] Furthermore, the top cover plate is provided with two water extraction ports, and the two water extraction ports are respectively arranged at the joints corresponding to the two bladder bodies.
[0015] Further, the injection port is an injection pipe interface, the injection pipe interface is protruding from the upper side of the top cover plate, the injection pipe interface is installed with an injection port cover, and the fixing member is detachably connected between the injection port cover and the bottom plate;
[0016] The water suction port is a water suction pipe interface, which is arranged to protrude from the upper side of the top cover plate, and a water suction port cover is installed on the water suction pipe interface.
[0017] Furthermore, a first hanging ring is fixed inside the injection port cover, a second hanging ring is fixed on the upper side of the bottom plate, the fixing member is a fixed connecting rod, and hooks are provided at both ends of the fixed connecting rod for being hooked and connected with the corresponding hanging rings.
[0018] Furthermore, a rubber sealing ring is provided between the lower part of the capsule and the bottom plate.
[0019] Furthermore, a plurality of lifting ears are provided on the upper side of the top cover plate, and the plurality of lifting ears are arranged at intervals in the circumferential direction with respect to the outer contour of the top cover plate.
[0020] The technical solution of the construction method of the suction anchor for water injection recovery of the present invention is:
[0021] The construction method using the suction anchor for water injection recovery comprises the following steps:
[0022] S1. Before anchoring, use the fixings to limit the bladder to an upward compressed state, close the discharge valve, and pre-vacuum the bladder;
[0023] S2. According to the construction requirements, the suction anchor is sunk to the seabed, and the seawater in the suction cavity is sucked out through the pumping port. Under the pressure difference between the inside and outside of the cylinder, the suction anchor is gradually anchored in place until the suction anchor and the soil are consolidated;
[0024] S3. When pulling out the anchor, first remove the fixings to release the bottom plate of the bladder;
[0025] S4, injecting water into the bladder through the injection port, as the bladder stretches downward and expands, the bottom plate is squeezed into contact with the seabed and generates interaction force, and the bladder pushes up the suction anchor;
[0026] S5. When the suction anchor is separated from the seabed, open the discharge valve to discharge the water inside the bladder, and lift it out to sea to complete the anchoring.
[0027] Beneficial effects: The suction anchor for water injection recovery adopts the design form of an anchor barrel structure and a bladder, wherein the lower part of the cylindrical barrel is open, and the top cover plate is fixedly connected to the upper part of the cylindrical barrel, forming an anchor barrel structure with an open lower part and a closed upper part; the bladder is accommodated and installed in the suction cavity inside the anchor barrel structure, and the bladder is connected to the injection port of the top cover plate, and the water extraction port is connected to the suction cavity. When sinking the anchor, the water in the suction cavity can be extracted through the water extraction port, forming a pressure difference between the inside and outside of the anchor barrel structure, and the downward pressure generated by the pressure difference between the inside and outside on the anchor barrel structure, so that the anchor barrel structure can be reliably adsorbed on the seabed.
[0028] Moreover, a bottom plate is provided at the lower part of the bladder, on which a discharge valve is installed. When pulling out the anchor, water is injected into the bladder through the injection port. As the bladder stretches and expands downward in the cylindrical barrel, the bottom plate of the bladder contacts the seabed and produces a squeezing effect. At the same time, the bladder forms a jacking force on the top cover plate and the anchor barrel structure. The bladder is designed as a temporary water storage space to avoid soil disturbance and seepage damage caused by directly injecting water or air into the anchor barrel, thereby ensuring a sufficiently large pressure difference between the inside and outside of the anchor barrel structure and achieving the purpose of smoothly pulling out the suction anchor.
[0029] After the anchor barrel structure is separated from the seabed, the discharge valve can be opened to quickly discharge the water in the bladder, so that the entire suction anchor can continue to discharge water upward to complete the recovery operation. In addition, a fixing is also provided inside the bladder, which is detachably connected between the injection port and the bottom plate of the bladder. When sinking the anchor, the bottom plate of the bladder is limited by the fixing to ensure that the bladder is stably maintained in an upward compressed state; when pulling out the anchor, the fixing is released to release the bottom plate of the bladder to meet the requirement of the bladder to expand downward. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 It is a schematic structural diagram of a suction anchor for water injection recovery in a specific embodiment of the suction anchor for water injection recovery of the present invention (when the bladder is in an upwardly compressed state);
[0031] Figure 2 It is a three-dimensional schematic diagram of the anchor barrel structure in a specific embodiment of the suction anchor for water injection recovery of the present invention;
[0032] Figure 3 It is a three-dimensional schematic diagram of a specific embodiment of a suction anchor for water injection recovery of the present invention, when two bladders are in a stretched and expanded state;
[0033] Figure 4 It is a three-dimensional schematic diagram of a specific embodiment of a suction anchor for water injection recovery of the present invention when the bladder is in a compressed state;
[0034] Figure 5 for Figure 4 Schematic diagram of the structure of the mesocyst.
[0035] In the figure: 1, anchor cylinder structure; 10, cylindrical cylinder; 11, top cover plate; 12, injection port; 12a, first injection port; 12b, second injection port;
[0036] 13. Water inlet; 14. Inlet cover; 15. Water inlet cover; 16. Lifting lug; 17. First hanging ring;
[0037] 2. bladder body; 2a. first bladder body; 2b. second bladder body; 20. bottom plate; 21. discharge valve; 22. second hanging ring; 23. rubber sealing ring; 3. fixing part. DETAILED DESCRIPTION
[0038] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0039] A specific embodiment 1 of the suction anchor for water injection recovery of the present invention is as follows Figures 1 to 5As shown, the suction anchor used for water injection recovery includes an anchor tube structure 1 and a bladder 2. The anchor tube structure 1 includes a cylindrical body 10 and a top cover plate 11. The lower part of the cylindrical body 10 is open, and the top cover plate 11 is fixedly connected to the upper part of the cylindrical body 10. A suction cavity is arranged inside the anchor tube structure 1, and the bladder 2 is accommodated and installed in the suction cavity. An injection port 12 and a water extraction port 13 are arranged on the top cover plate 11. The bladder 2 is connected to the lower side of the top cover plate 11, and the bladder 2 is connected to the injection port 12, and the water extraction port 13 is connected to the suction cavity.
[0040] A bottom plate 20 is provided at the lower part of the sac body 2, on which a discharge valve 21 is installed, and a fixing part 3 is also provided inside the sac body 2, which is detachably connected between the injection port 12 and the bottom plate 20 of the sac body 2; when anchoring, the fixing part 3 is used to limit the bottom plate 20 of the sac body 2 so that the sac body 2 is in an upwardly compressed state; when pulling out the anchor, the fixing part 3 is released to release the bottom plate 20 of the sac body 2, and fluid is injected into the sac body 2 so that the sac body 2 can stretch and expand downward.
[0041] The suction anchor for water injection recovery adopts the design form of an anchor barrel structure 1 and a bladder 2, wherein the lower part of the cylindrical barrel 10 is open, and the top cover plate 11 is fixedly connected to the upper part of the cylindrical barrel 10, forming an anchor barrel structure 1 with an open lower part and a closed upper part; the bladder 2 is accommodated in a suction cavity installed inside the anchor barrel structure 1, and the bladder 2 is connected to the injection port 12 of the top cover plate 11, and the water extraction port 13 is connected to the suction cavity. When sinking the anchor, the water in the suction cavity can be extracted through the water extraction port 13, forming a pressure difference between the inside and outside of the anchor barrel structure 1, and the downward pressure generated by the pressure difference between the inside and the outside on the anchor barrel structure 1, so that the anchor barrel structure 1 can be reliably adsorbed on the seabed.
[0042] Moreover, a bottom plate 20 is provided at the lower part of the bladder 2, and a discharge valve 21 is installed on the bottom plate 20. When pulling out the anchor, water is injected into the bladder 2 through the injection port 12. As the bladder 2 stretches and expands downward in the cylindrical barrel 10, the bottom plate 20 of the bladder 2 contacts the seabed and produces a squeezing effect; at the same time, the bladder 2 forms a jacking force on the top cover plate 11 and the anchor barrel structure 1. The bladder 2 is designed as a temporary water storage space to avoid the situation where soil disturbance and seepage damage in the barrel are easily caused when water or air is directly injected into the anchor barrel, thereby ensuring that a sufficiently large pressure difference is formed between the inside and the outside of the anchor barrel structure 1, thereby achieving the purpose of smoothly pulling out the suction anchor.
[0043] After the anchor barrel structure 1 is separated from the seabed, the discharge valve 21 is opened to quickly discharge the water in the bladder 2, so that the entire suction anchor continues to discharge water upward to complete the recovery operation. In addition, a fixing member 3 is also provided inside the bladder 2, and the fixing member 3 is detachably connected between the injection port 12 and the bottom plate 20 of the bladder 2. When sinking the anchor, the bottom plate 20 of the bladder 2 is limited by the fixing member 3 to ensure that the bladder 2 is stably maintained in an upwardly compressed state; when pulling out the anchor, the fixing member 3 is released to release the bottom plate 20 of the bladder 2 to meet the requirement of the bladder 2 to expand downward.
[0044] In this embodiment, two capsules 2 are provided, and the two capsules 2 are arranged side by side in the suction cavity, and the expansion and contraction directions of the two capsules 2 are arranged to extend along the axial direction of the cylindrical barrel 10. Specifically, the contour shape of the cylindrical barrel 10 is cylindrical, and the contour shapes of the two capsules 2 are both semi-cylindrical, and the two capsules 2 are symmetrically arranged with respect to the axial section of the cylindrical barrel 10; the two capsules 2 are respectively the first capsule 2a and the second capsule 2b, and the injection ports 12 are respectively the first injection port 12a and the second injection port 12b, and the first capsule 2a is connected to the first injection port 12a, and the second capsule 2b is connected to the second injection port 12b.
[0045] In order to meet different usage requirements, in other embodiments, the number of capsules is not limited to two, but can be designed to be one, three or more. Three or more capsules are arranged in parallel in the suction chamber, and the expansion and contraction direction of the three or more capsules is arranged along the axis direction of the cylindrical body. Water is injected into the three or more capsules through the injection port, and the expansion and deformation of the capsules can also play an upward push role for the anchor tube structure. In addition, the shape of the cylindrical body can also be designed as a triangular prism, a quadrangular prism or other polyhedral prism, or as a column with an elliptical cross-section.
[0046] Correspondingly, the top cover plate 11 is provided with two water extraction ports 13, which are respectively arranged at the joints between the two bladder bodies 2. That is, the water extraction ports 13 are staggered with the upper side of the bladder body 2, so as to avoid the bladder body 2 being attached to the bottom of the top cover plate 11, thereby affecting the conduction between the water extraction ports 13 and the suction chamber; during the anchoring operation, the water in the anchor barrel structure 1 can be smoothly extracted through the water extraction ports 13, thereby forming the pressure difference between the inside and outside of the barrel.
[0047] As a further preferred solution, the injection port 12 is an injection pipe interface, which is protruding from the upper side of the top cover plate 11. The injection port 12 is designed as an injection pipe interface to facilitate the connection of the water injection pipeline. The injection pipe interface is equipped with an injection port cover 14, and the fixing member 3 is detachably connected between the injection port cover 14 and the bottom plate 20. During the anchoring stage, the injection port cover 14 is sealed and installed on the injection port 12 to ensure that the bladder 2 remains in a compressed state at the upper part of the cylindrical barrel 10. In addition, the injection port cover 14 is also provided with an exhaust port to pre-vacuum the bladder 2 before anchoring.
[0048] Correspondingly, the water pumping port 13 is a water pumping pipe interface, which is protruding from the upper side of the top cover plate 11 to facilitate connecting the water pumping pipeline into place; the water pumping pipe interface is equipped with a water pumping port cover 15, and during the anchoring stage, the water pumping port cover 15 is sealed and installed on the water pumping port 13 to ensure the sealing of the upper top cover 11.
[0049] Among them, a first hanging ring 17 is fixed inside the injection port cover 14, a second hanging ring 22 is fixed on the upper side of the bottom plate 20, and the fixing member 3 is a fixed connecting rod, and hooks are provided at both ends of the fixed connecting rod for hooking and connecting with the corresponding hanging rings. Before anchoring, the hook at the upper end of the fixed connecting rod is first hung on the first hanging ring 17, and the hook at the lower end of the fixed connecting rod is connected to the second hanging ring 22. The fixed connecting rod plays a limiting role on the bottom plate 20 of the bladder body 2, ensuring that the bladder body 2 is stably maintained in an upwardly compressed state.
[0050] In addition, a rubber sealing ring 23 is provided between the lower part of the bladder 2 and the bottom plate 20, which improves the sealing between the lower part of the bladder 2 and the bottom plate 20. In addition, a plurality of lifting ears 16 are provided on the upper side of the top cover plate 11, and the plurality of lifting ears 16 are arranged at intervals in the circumferential direction with respect to the outer contour of the top cover plate 11. The plurality of lifting ears 16 can be connected with lifting cables or mooring cables, so as to facilitate the subsequent anchor sinking and anchor pulling operations.
[0051] The construction method using the suction anchor for water injection recovery comprises the following steps:
[0052] S1. Before anchoring, use the fixings to limit the bladder to an upward compressed state, close the discharge valve, and pre-vacuum the bladder;
[0053] S2. According to the construction requirements, the suction anchor is sunk to the seabed, and the seawater in the suction cavity is sucked out through the pumping port. Under the pressure difference between the inside and outside of the cylinder, the suction anchor is gradually anchored in place until the suction anchor and the soil are consolidated;
[0054] S3. When pulling out the anchor, first remove the fixings to release the bottom plate of the bladder;
[0055] S4, injecting water into the bladder through the injection port, as the bladder stretches downward and expands, the bottom plate is squeezed into contact with the seabed and generates interaction force, and the bladder pushes up the suction anchor;
[0056] S5. When the suction anchor is separated from the seabed, open the discharge valve to discharge the water inside the bladder, and lift it out to sea to complete the anchoring.
[0057] The specific embodiment of the construction method of the suction anchor for water injection recovery of the present invention is the same as the specific implementation of the construction method of the suction anchor for water injection recovery in the specific embodiment of the suction anchor for water injection recovery of the present invention, and will not be repeated here.
[0058] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.
Claims
1. A suction anchor for water injection recovery, characterized in that: It comprises an anchor tube structure and a capsule, wherein the anchor tube structure comprises a cylindrical body and a top cover plate, the lower part of the cylindrical body is open, and the top cover plate is fixedly connected to the upper part of the cylindrical body; a suction cavity is arranged inside the anchor tube structure, and the capsule is accommodated and installed in the suction cavity; The top cover plate is provided with an injection port and a water extraction port, the bladder body is connected to the lower side of the top cover plate, and the bladder body is communicated with the injection port, and the water extraction port is communicated with the suction chamber; A bottom plate is provided at the lower part of the bladder body, a discharge valve is installed on the bottom plate, and a fixing piece is also provided inside the bladder body, and the fixing piece is detachably connected between the injection port and the bottom plate of the bladder body; When anchoring, the fixing member is used to limit the bottom plate of the bladder so that the bladder is in an upwardly compressed state; When the anchor is pulled out, the fixing member is released to release the bottom plate of the bladder, and fluid is injected into the bladder to allow the bladder to expand downward.
2. The suction anchor for water injection recovery according to claim 1 is characterized in that: The two sacs are provided with two sacs, which are arranged side by side in the suction cavity, and the expansion and contraction directions of the two sacs are extended along the axial direction of the cylindrical barrel.
3. The suction anchor for water injection recovery according to claim 2 is characterized in that: The cylindrical body has a cylindrical outline, the two capsules have semi-cylindrical outlines, and the two capsules are symmetrically arranged with respect to the axial section of the cylindrical body; The two capsules are respectively a first capsule and a second capsule. The two injection ports are respectively a first injection port and a second injection port. The first capsule is connected to the first injection port, and the second capsule is connected to the second injection port.
4. The suction anchor for water injection recovery according to claim 2 is characterized in that: The top cover plate is provided with two water extraction ports, and the two water extraction ports are respectively arranged at the joints corresponding to the two bladder bodies.
5. The suction anchor for water injection recovery according to claim 1, characterized in that: The injection port is an injection pipe interface, the injection pipe interface is protruding from the upper side of the top cover plate, the injection pipe interface is installed with an injection port cover, and the fixing member is detachably connected between the injection port cover and the bottom plate; The water suction port is a water suction pipe interface, which is arranged to protrude from the upper side of the top cover plate, and a water suction port cover is installed on the water suction pipe interface.
6. The suction anchor for water injection recovery according to claim 5, characterized in that: A first hanging ring is fixed inside the injection port cover, a second hanging ring is fixed on the upper side of the bottom plate, the fixing member is a fixed connecting rod, and hooks are provided at both ends of the fixed connecting rod for being hooked and connected with the corresponding hanging rings.
7. The suction anchor for water injection recovery according to claim 1 is characterized in that: A rubber sealing ring is arranged between the lower part of the capsule and the bottom plate.
8. The suction anchor for water injection recovery according to claim 1, characterized in that: A plurality of lifting ears are also provided on the upper side of the top cover plate, and the plurality of lifting ears are arranged at intervals in the circumferential direction with respect to the outer contour of the top cover plate.
9. A construction method using the suction anchor for water injection recovery according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Before anchoring, use the fixings to limit the bladder to an upward compressed state, close the discharge valve, and pre-vacuum the bladder; S2. According to the construction requirements, the suction anchor is sunk to the seabed, and the seawater in the suction cavity is sucked out through the pumping port. Under the pressure difference between the inside and outside of the cylinder, the suction anchor is gradually anchored in place until the suction anchor and the soil are consolidated; S3. When pulling out the anchor, first remove the fixings to release the bottom plate of the bladder; S4, injecting water into the bladder through the injection port, as the bladder stretches downward and expands, the bottom plate is squeezed into contact with the seabed and generates interaction force, and the bladder pushes up the suction anchor; S5. When the suction anchor is separated from the seabed, open the discharge valve to discharge the water inside the bladder, and lift it out to sea to complete the anchoring.