Pile injection device and assembly method

Abstract

The present invention relates to the field of offshore platform technology, and in particular to a pile-punching and jetting device, comprising a mounting seat, a valve seat, and a valve stem assembly. The mounting seat is provided with an assembly hole, one end of which is connected to a pile-punching pipeline, and a sealing port is provided in the assembly hole. The valve seat is arranged in the assembly hole, and a guide groove and a central through hole are provided on the valve seat. The guide groove is opened toward the sealing port, and the valve seat is located on the side of the sealing port away from the pile-punching pipeline. The valve stem assembly comprises a valve stem, an elastic member, a first sealing member, and a second sealing member. The valve stem is movably provided through the central through hole, the first sealing member is connected to one end of the valve stem, the first sealing member is movably provided in the guide groove, the elastic member is sleeved on the valve stem, one end of the elastic member presses against the first sealing member, and the other end presses against the bottom of the guide groove to push the first sealing member to seal the sealing port, and the second sealing member seals the port at the other end of the assembly hole. The present invention also provides an assembly method, which is applied to the above-mentioned pile-punching and jetting device.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore platforms, and in particular to a pile-jetting device and an assembly method thereof. Background Art

[0002] In the field of offshore platforms, all platforms are equipped with pile legs and pile shoes at the bottom. The pile legs and pile shoes are equipped with a pile driving system inside for pile standing and pile pulling operations. The traditional pile driving system is equipped with a pile driving jet device at the pile shoe. When the platform is pulling piles, the pile driving pump is started and high-pressure water is injected into the pile driving pipe. The other end of the pile driving pipe is connected to the pile driving jet device. The pile driving jet device sprays high-pressure water to impact the mud and sand around the pile shoe to reduce the resistance of the pile pulling operation and improve the pile pulling efficiency. The existing technology is to directly connect the nozzle at the end of the pile driving pipe to the upper and lower surfaces of the pile shoe. The nozzle is unblocked and directly connected to the outside world. Mud, sand, gravel and other objects can easily cause the nozzle to clog, affecting the pile pulling efficiency of the platform.

[0003] Therefore, there is an urgent need for a pile impact jetting device and an assembly method to solve the above problems. Summary of the Invention

[0004] An object of the present invention is to provide a pile punching and jetting device that can prevent blockage and ensure pile pulling efficiency.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A pile punching and jetting device is provided, comprising:

[0007] A mounting seat, wherein the mounting seat is provided with an assembly hole, one end of the assembly hole is connected to the pile driving pipeline, and the assembly hole has a sealing opening;

[0008] a valve seat, the valve seat being disposed in the assembly hole, the valve seat being provided with a guide groove and a central through hole, the guide groove being connected to the central through hole, the guide groove being opened toward the sealing port, and the valve seat being located on a side of the sealing port away from the pile driving pipeline;

[0009] A valve stem assembly, the valve stem assembly includes a valve stem, an elastic member, a first seal and a second seal, the valve stem is movably inserted into the central through hole, the first seal is connected to one end of the valve stem, the first seal is movably arranged in the guide groove, the elastic member is sleeved on the valve stem, one end of the elastic member presses against the first seal, and the other end presses against the bottom of the guide groove to push the first seal to seal the sealing port, the second seal is connected to the other end of the valve stem, when the first seal seals the sealing port, the second seal seals the port at the other end of the assembly hole.

[0010] As a preferred solution of the pile driving injection device, the valve seat divides the assembly hole into a first chamber and a second chamber, the first sealing member is located in the first chamber, and the second sealing member is located in the second chamber. The valve seat includes a connecting portion, which is circumferentially connected to the inner wall of the assembly hole. A plurality of communicating grooves are formed on the connecting portion, and the inner wall of each communicating groove and the inner wall of the assembly hole together enclose a flow hole to connect the first chamber and the second chamber.

[0011] As a preferred solution of the pile punching and jetting device, a limiting groove is provided on the first sealing member, the valve stem is connected to the bottom of the limiting groove, the limiting groove is opened toward the elastic member, and the elastic member is partially located in the limiting groove.

[0012] As a preferred solution of the pile punching and jetting device, a threaded hole is provided at the bottom of the limiting groove, and one end of the valve stem is threadedly engaged with the threaded hole.

[0013] As a preferred solution of the pile driving injection device, the assembly hole includes a stepped hole, the stepped hole includes a first hole and a second hole, the aperture of the first hole is smaller than the aperture of the second hole, the first hole is closer to the pile driving pipeline than the second hole, and the first sealing member can abut against the stepped portion of the stepped hole.

[0014] As a preferred solution for the pile driving injection device, the port at the other end of the assembly hole is a flared portion, and the closer to the pile driving pipeline, the smaller the cross-sectional area of ​​the flared portion. The second sealing member has a circumferential inclined surface, and the inclined surface can be circumferentially sealed and fitted with the inner wall surface of the flared portion.

[0015] As a preferred solution of the pile punching and jetting device, the valve stem assembly further includes a cover plate and a nut. The cover plate is sleeved on the valve stem, and the cover plate is arranged on a side of the second sealing member away from the pile punching pipeline. The nut is threadedly connected to the other end of the valve stem, and the nut abuts against the cover plate.

[0016] As a preferred solution of the pile punching and jetting device, a first avoidance groove is provided on the cover plate, and the nut is arranged in the first avoidance groove.

[0017] As a preferred solution of the pile punching and jetting device, a second avoidance groove is provided on the mounting seat, the assembly hole is connected to the bottom of the second avoidance groove, and the cover plate can be arranged in the second avoidance groove.

[0018] Another object of the present invention is to provide an assembly method for assembling a pile punching and jetting device, which can ensure pile pulling efficiency.

[0019] To achieve this object, the present invention adopts the following technical solutions:

[0020] An assembly method is provided for the above-mentioned pile punching and jetting device, the assembly method comprising the following steps:

[0021] Assembly stage: thread the valve stem and the first sealing member together and weld them together. Sleeve the elastic member on the valve stem and place it in the limiting groove of the first sealing member. Sleeve the valve seat on the valve stem and place the whole valve seat into the assembly hole of the mounting seat. Thread the valve seat onto the inner wall of the assembly hole. Sleeve the second sealing member and the cover plate onto the valve stem in sequence. Thread the nut onto the other end of the valve stem.

[0022] Testing stage: Check whether the valve stem assembly can move relative to the valve seat without being stuck. If so, proceed to the installation stage;

[0023] Installation phase: loosen the nut, remove the cover plate and the second seal, then insert the remaining components into the opening of the pile shoe, circumferentially weld the mounting seat to the side wall of the opening, insert the pile driving pipe into the assembly hole, weld the pile driving pipe to the mounting seat, and reinstall the second seal, the cover plate and the nut.

[0024] Beneficial effects of the present invention:

[0025] The present invention provides a pile driving injection device, comprising a mounting seat, a valve seat, and a valve stem assembly. The mounting seat is provided with an assembly hole, one end of which is connected to a pile driving pipeline, and a sealing port is provided in the assembly hole. The valve seat is arranged in the assembly hole, and a guide groove and a central through hole are provided on the valve seat. The guide groove is connected to the central through hole, and the guide groove is opened toward the sealing port. The valve seat is located on the side of the sealing port away from the pile driving pipeline. The valve stem assembly comprises a valve stem, an elastic member, a first sealing member, and a second sealing member. The valve stem is movably provided through the central through hole. The first sealing member is connected to one end of the valve stem and is movably provided in the guide groove. The elastic member is sleeved on the valve stem. One end of the elastic member presses against the first sealing member, and the other end presses against the bottom of the guide groove to push the first sealing member to seal the sealing port. The second sealing member is connected to the other end of the valve stem. When the first seal seals the sealing port, the second seal seals the port at the other end of the assembly hole. That is, the high-pressure water in the pile driving pipeline can press against the first seal from one end of the assembly hole of the mounting seat. The first seal is forced to move within the valve seat, and the first seal drives the second seal to move. The first seal leaves the sealing port, and the second seal leaves the port at the other end of the assembly hole. The high-pressure water can then be sprayed to the outside of the other end of the assembly hole through the sealing port and the port at the other end of the assembly hole. When this pile driving spraying device is installed on the outer surface of the pile shoe, high-pressure water can be sprayed toward mud and sand on the outside of the pile shoe, reducing the resistance to the pile pulling operation. When pile pulling is not required, the first seal is sealed at the sealing port under the push of the elastic member, and the second seal seals the port at the other end of the assembly hole, thereby cutting off the connection between the outside and the inner cavity of the assembly hole twice. That is, if mud and sand enter the assembly hole, a secondary seal can be achieved at the sealing port to prevent mud and sand from blocking the assembly hole, thereby ensuring the normal use of the pile driving spraying device.

[0026] The present invention provides an assembly method for the above-mentioned pile driving and jetting device, the assembly method comprising the following steps: an assembly phase: threading the valve stem and the first sealing member together and welding them together; sleeve the elastic member onto the valve stem and place it in the limiting groove of the first sealing member; sleeve the valve seat onto the valve stem and place the entire assembly into the assembly hole of the mounting seat; thread the valve seat onto the inner wall of the assembly hole; sleeve the second sealing member and the cover plate onto the valve stem in sequence; and thread the nut onto the other end of the valve stem; a testing phase: checking whether the valve stem assembly can move relative to the valve seat without being stuck, and if so, proceeding to the installation phase; an installation phase: loosening the nut, removing the cover plate and the second sealing member, then inserting the remaining assembly into the opening of the pile shoe, circumferentially welding the mounting seat to the side wall of the opening, inserting the pile driving pipe into the assembly hole, welding the pile driving pipe to the mounting seat, and replacing the second sealing member, the cover plate, and the nut. The above-mentioned assembly method can be used to assemble and install the pile driving and jetting device on a platform, thereby achieving the auxiliary effect of the pile driving and jetting device in pile pulling operations and ensuring pile pulling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1is a cross-sectional view of a pile punching and jetting device in a closed state provided by an embodiment of the present invention;

[0028] Figure 2 is a cross-sectional view of the pile punching and jetting device provided by an embodiment of the present invention in an open state;

[0029] Figure 3 Schematic diagram of the structure of the valve seat provided by an embodiment of the present invention.

[0030] In the picture:

[0031] 1. Mounting seat; 11. Step portion; 12. Expanding portion; 101. Sealing opening; 102. Second avoidance groove;

[0032] 2. Valve seat; 201. Guide groove; 21. Connecting portion; 2101. Connecting groove;

[0033] 3. Valve stem; 4. Elastic part;

[0034] 5. First sealing member; 501. Limiting groove;

[0035] 6. Second sealing member; 61. Inclined surface;

[0036] 7. Cover plate; 701. First avoidance groove;

[0037] 8. Nut;

[0038] 100. Pile driving jet device; 200. Pile driving pipe; 300. Pile shoe. DETAILED DESCRIPTION

[0039] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only show portions relevant to the present invention, not all of them.

[0040] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention.

[0041] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0042] like Figure 1-Figure 2 As shown, the pile driving injection device 100 of this embodiment includes a mounting base 1, a valve seat 2, and a valve stem assembly. The mounting base 1 has an assembly hole extending therethrough, one end of which is connected to the pile driving pipeline. A sealing opening 101 is defined within the assembly hole. The valve seat 2 is disposed within the assembly hole and has a guide groove 201 and a central through hole. The guide groove 201 is connected to the central through hole and faces the sealing opening 101. The valve seat 2 is located on the side of the sealing opening 101 away from the pile driving pipeline. The valve stem assembly includes a valve stem 3, an elastic member 4, a first sealing member 5 and a second sealing member 6. The valve stem 3 is movably inserted into the center through hole. The first sealing member 5 is connected to one end of the valve stem 3. The first sealing member 5 is movably arranged in the guide groove 201. The elastic member 4 is sleeved on the valve stem 3. One end of the elastic member 4 presses against the first sealing member 5, and the other end presses against the bottom of the guide groove 201 to push the first sealing member 5 to seal the sealing port 101. The second sealing member 6 is connected to the other end of the valve stem 3. When the first sealing member 5 seals the sealing port 101, the second sealing member 6 seals the port at the other end of the assembly hole.

[0043] High-pressure water from the pile driving pipeline presses against the first seal 5 at one end of the mounting hole of the mounting base 1. The first seal 5 is forced to move within the valve seat 2, driving the second seal 6 to move. The first seal 5 then leaves the sealing opening 101, and the second seal 6 leaves the port at the other end of the mounting hole. High-pressure water is then ejected through the sealing opening 101 and the port at the other end of the mounting hole to the outside of the mounting hole. When the pile driving spraying device 100 is mounted on the outer surface of the pile shoe 300, it sprays high-pressure water onto mud and sand outside the pile shoe 300, reducing resistance to pile extraction. When pile extraction is not required, the first seal 5, driven by the elastic member 4, seals against the sealing opening 101, while the second seal 6 seals against the port at the other end of the mounting hole. This effectively cuts off communication between the outside and the mounting hole cavity. Even if mud and sand enter the mounting hole, a secondary seal is achieved at the sealing opening 101, preventing mud and sand from blocking the mounting hole and ensuring the proper operation of the pile driving spraying device 100.

[0044] Preferably, the valve seat 2 divides the assembly hole into a first cavity and a second cavity, the first sealing member 5 is located in the first cavity, and the second sealing member 6 is located in the second cavity. Figure 3 As shown, the valve seat 2 includes a connecting portion 21, which is circumferentially connected to the inner wall of the assembly hole. Multiple connecting grooves 2101 are defined in the connecting portion 21. The inner wall of each connecting groove 2101, together with the inner wall of the assembly hole, forms a flow hole connecting the first and second chambers. In other words, the multiple connecting grooves 2101 form a plurality of connecting holes, allowing high-pressure water to enter the second chamber from the first chamber through the connecting holes. The provision of the connecting holes helps ensure uniformity of the high-pressure water entering the second chamber and maintains a high water pressure there, thereby increasing the downstream water flow velocity and improving the impact of sediment.

[0045] In order to limit the position of the elastic member 4 and ensure its expansion and contraction along its own axial direction, preferably, a limiting groove 501 is opened on the first sealing member 5, the valve stem 3 is connected to the bottom of the limiting groove 501, the limiting groove 501 is opened toward the elastic member 4, and the elastic member 4 is partially located in the limiting groove 501.

[0046] In order to facilitate assembly and disassembly between the valve stem 3 and the first sealing member 5 , preferably, a threaded hole is provided at the bottom of the limiting groove 501 , and one end of the valve stem 3 is threadedly engaged with the threaded hole.

[0047] Preferably, the first sealing member 5 is provided with a guide portion protruding toward the pile driving pipe 200 . The guide portion is located at the center of the first sealing member 5 . The guide portion helps to guide the high-pressure water.

[0048] Preferably, the assembly hole includes a stepped hole, the stepped hole includes a first hole and a second hole, the aperture of the first hole is smaller than the aperture of the second hole, the first hole is closer to the pile driving pipeline than the second hole, the first sealing member 5 can abut against the step portion 11 of the stepped hole, and when the high-pressure water is not turned on, the first sealing member 5 is seated on the step portion 11.

[0049] Preferably, the port at the other end of the assembly hole is a flared portion 12. The cross-sectional area of ​​the flared portion 12 decreases as it approaches the pile driving pipeline. The second sealing member 6 has a circumferentially inclined surface 61 that circumferentially seals against the inner wall of the flared portion 12, thereby achieving a large-area surface seal and ensuring a good sealing effect. Further preferably, the second sealing member 6 is made of an elastic material, and the inclined surface 61 and the flared portion 12 have an interference fit to prevent gaps between the inclined surface 61 and the flared portion 12 due to production and assembly errors. Optionally, the second sealing member 6 can be made of plastic or rubber.

[0050] Preferably, the valve stem assembly further comprises a cover plate 7 and a nut 8. The cover plate 7 is sleeved on the valve stem 3 and is disposed on the side of the second sealing member 6 away from the pile driving pipeline. The nut 8 is threadedly connected to the other end of the valve stem 3 and abuts against the cover plate 7. The cover plate 7 is attached to the outer side of the second sealing member 6 to evenly apply the force applied by the nut 8 to the second sealing member 6, thereby preventing the second sealing member 6 from directly contacting the nut 8 and causing wear.

[0051] Preferably, the nut 8 is a cover-type structure, and the cover is provided at the end of the screw to protect the end of the screw.

[0052] Preferably, a first avoidance groove 701 is provided on the cover plate 7 , and the nut 8 is arranged in the first avoidance groove 701 , which helps to reduce the impact of external mud and sand on the nut 8 .

[0053] Preferably, a second avoidance groove 102 is provided on the mounting seat 1, and the assembly hole is connected to the bottom of the second avoidance groove 102. The cover plate 7 can be arranged in the second avoidance groove 102, which can prevent the cover plate 7 from being impacted and worn by external objects to a certain extent.

[0054] The pile punching and jetting device 100 can be set at any position on the outer surface of the pile shoe 300, such as the upper surface, the lower surface or any side surface. Its opening and closing are not affected by the assembly orientation. By setting multiple pile punching and jetting devices 100 at different positions on the pile shoe 300, loosening of various parts of the outer side of the pile shoe 300 can be achieved, which helps to ensure the efficiency of pile pulling.

[0055] This embodiment further provides an assembly method, which is applied to the above-mentioned pile punching and jetting device 100. The assembly method includes the following steps:

[0056] Assembly: Thread the valve stem 3 and the first sealing member 5 together and weld them securely, which can be done by spot welding. Then, fit the elastic member 4 onto the valve stem 3 and place it in the retaining groove 501 of the first sealing member 5. Fit the valve seat 2 onto the valve stem 3 and place the entire assembly into the assembly hole of the mounting base 1. Thread the valve seat 2 onto the inner wall of the assembly hole. Fit the second sealing member 6 and cover plate 7 onto the valve stem 3 in sequence, and thread the nut 8 onto the other end of the valve stem 3.

[0057] Detection phase: Check whether the valve stem assembly can move relative to the valve seat 2 without being stuck. If so, proceed to the installation phase.

[0058] Installation: To prevent the second seal 6 from being burned and deformed by high-temperature welding, it is necessary to first remove it. Specifically, loosen the nut 8, remove the cover plate 7 and the second seal 6, then insert the remaining components into the opening of the pile shoe 300. Circumferentially weld the mounting base 1 to the sidewalls of the opening, using full penetration welding to ensure joint strength. Insert the pile driving pipe 200 into the assembly hole and weld it to the mounting base 1. Replace the second seal 6, cover plate 7, and nut 8.

[0059] By applying the above-mentioned assembly method, the pile punching and jetting device 100 can be assembled and installed on the platform, thereby achieving the auxiliary effect of the pile punching and jetting device 100 on the pile pulling operation and ensuring the pile pulling efficiency.

[0060] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Pile jetting device, characterized in that: include: A mounting seat (1), wherein an assembly hole is formed through the mounting seat (1), one end of the assembly hole is connected to a pile driving pipeline, and a sealing opening (101) is provided in the assembly hole; a valve seat (2), the valve seat (2) being arranged in the assembly hole, the valve seat (2) being provided with a guide groove (201) and a central through hole, the guide groove (201) being connected to the central through hole, the guide groove (201) being opened toward the sealing port (101), and the valve seat (2) being located on a side of the sealing port (101) away from the pile driving pipeline; A valve stem assembly, the valve stem assembly comprising a valve stem (3), an elastic member (4), a first sealing member (5) and a second sealing member (6), the valve stem (3) being movably arranged in the central through hole, the first sealing member (5) being connected to one end of the valve stem (3), the first sealing member (5) being movably arranged in the guide groove (201), the elastic member (4) being sleeved on the valve stem (3), one end of the elastic member (4) pressing against the first sealing member (5), and the other end pressing against the bottom of the guide groove (201) to push the first sealing member (5) to block the sealing port (101), the second sealing member (6) being connected to the other end of the valve stem (3), when the first sealing member (5) seals the sealing port (101), the second sealing member (6) seals the port at the other end of the assembly hole; The valve seat (2) divides the assembly hole into a first cavity and a second cavity, the first sealing member (5) is located in the first cavity, and the second sealing member (6) is located in the second cavity, the valve seat (2) comprises a connecting portion (21), the connecting portion (21) is circumferentially connected to the inner wall of the assembly hole, a plurality of communicating grooves (2101) are formed on the connecting portion (21), and the inner wall of each communicating groove (2101) and the inner wall of the assembly hole are together formed to form a flow hole to connect the first cavity and the second cavity; A limiting groove (501) is provided on the first sealing member (5), the valve stem (3) is connected to the bottom of the limiting groove (501), the limiting groove (501) is provided toward the elastic member (4), and the elastic member (4) is partially located in the limiting groove (501); A threaded hole is provided at the bottom of the limiting groove (501), and one end of the valve stem (3) is threadedly engaged with the threaded hole; The assembly hole comprises a stepped hole, the stepped hole comprises a first hole and a second hole, the aperture of the first hole is smaller than the aperture of the second hole, the first hole is closer to the pile driving pipeline than the second hole, and the first sealing member (5) can abut against the stepped portion (11) of the stepped hole; The port at the other end of the assembly hole is a flared portion (12), and the closer to the pile driving pipeline, the smaller the cross-sectional area of ​​the flared portion (12). The second sealing member (6) has a circumferential inclined surface (61), and the inclined surface (61) can be circumferentially sealed and fitted with the inner wall surface of the flared portion (12); The valve stem assembly further comprises a cover plate (7) and a nut (8), wherein the cover plate (7) is sleeved on the valve stem (3), the cover plate (7) is arranged on a side of the second sealing member (6) away from the pile driving pipeline, the nut (8) is threadedly connected to the other end of the valve stem (3), and the nut (8) abuts against the cover plate (7).

2. The pile jetting device according to claim 1, characterized in that: A first avoidance groove (701) is provided on the cover plate (7), and the nut (8) is arranged in the first avoidance groove (701).

3. The pile jetting device according to claim 1, characterized in that: A second avoidance groove (102) is provided on the mounting seat (1), the assembly hole is connected to the bottom of the second avoidance groove (102), and the cover plate (7) can be arranged in the second avoidance groove (102).

4. Assembly method, characterized in that, Applied to the pile punching and jetting device according to any one of claims 1 to 3, the assembly method comprises the following steps: Assembly stage: threading the valve stem (3) and the first sealing member (5), welding them together, sleeve the elastic member (4) on the valve stem (3), and place it in the limiting groove (501) of the first sealing member (5), sleeve the valve seat (2) on the valve stem (3), and put the whole into the assembly hole of the mounting seat (1), and thread the valve seat (2) to the inner wall of the assembly hole, sleeve the second sealing member (6) and the cover plate (7) on the valve stem (3) in sequence, and thread the nut (8) to the other end of the valve stem (3); Testing stage: Check whether the valve stem assembly can move relative to the valve seat (2) without being stuck, and if so, proceed to the installation stage; Installation phase: loosen the nut (8), remove the cover plate (7) and the second seal (6), then insert the remaining components into the opening of the pile shoe (300), circumferentially weld the mounting seat (1) to the side wall of the opening, insert the pile driving pipe (200) into the assembly hole, weld the pile driving pipe (200) to the mounting seat (1), and reinstall the second seal (6), the cover plate (7) and the nut (8).

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