Pile impact nozzle assembly and installation method

Abstract

The present invention relates to the field of offshore platform technology, and in particular to a pile driving nozzle assembly, comprising a mounting seat, a throttle plate, a valve stem, and an elastic member. An assembly hole is provided through the mounting seat, one end of which is connected to a pile driving pipeline. The side wall of the throttle plate is circumferentially connected to the inner wall of the assembly hole, and a throttle hole is provided on the throttle plate. The valve stem is movably arranged in the assembly hole. When the valve stem is in a first position in the assembly hole, the first blocking portion of the valve stem blocks the throttle hole, and the second blocking portion of the valve stem blocks the end of the assembly hole away from the pile driving pipeline. A first hole and a plurality of second holes are provided in the valve stem, which are connected to each other. When the valve stem is in a second position in the assembly hole, the throttle hole is connected to the first hole, and the second hole is connected to the outside world. An elastic member is provided, wherein the elastic member is sleeved on the valve stem, and the elastic member has a tendency to cause the valve stem to be in the first position. The present invention also provides an installation method, which is applied to the above-mentioned pile driving nozzle assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore platforms, and in particular to a pile driving nozzle assembly and an installation 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 setting and pile pulling operations. The traditional pile driving system is equipped with a pile driving nozzle assembly 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 nozzle assembly. The pile driving nozzle assembly 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, etc. 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 driving nozzle assembly and an installation method to solve the above problems. Summary of the Invention

[0004] An object of the present invention is to provide a pile driving nozzle assembly 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 nozzle assembly is provided, comprising:

[0007] A mounting seat, wherein a mounting hole is formed through the mounting seat, and one end of the mounting hole is connected to the pile driving pipeline;

[0008] a throttle plate, wherein the side wall of the throttle plate is circumferentially connected to the inner wall of the assembly hole, and a throttle hole is formed on the throttle plate;

[0009] a valve stem, the valve stem being movably disposed in the assembly hole, the valve stem having a first blocking portion and a second blocking portion, wherein when the valve stem is located in a first position in the assembly hole, the first blocking portion blocks the throttling hole, and the second blocking portion blocks the port of the assembly hole away from the pile driving pipeline, a first hole and a plurality of second holes being formed in the valve stem, one end of the first hole being penetrated, the other end of the first hole being communicated with one end of each of the plurality of second holes, the plurality of second holes extending radially along the valve stem, the other ends of the plurality of second holes being penetrated, and when the valve stem is located in a second position in the assembly hole, the throttling hole is communicated with the first hole, and the second hole is communicated with the outside world;

[0010] An elastic member is sleeved on the valve stem, and the elastic member has a tendency to make the valve stem be located at the first position.

[0011] As a preferred solution of the pile driving nozzle assembly, a plurality of throttling holes are circumferentially opened on the throttling plate, and the first blocking portion is an annular plane capable of blocking the plurality of throttling holes simultaneously.

[0012] As a preferred solution of the pile punching nozzle assembly, it also includes a valve seat, which is arranged in the assembly hole. The valve seat is a tubular structure, and a first step portion is provided on the inner ring of the valve seat. One end of the elastic member abuts against the valve stem, and the other end abuts against the first step portion.

[0013] As a preferred solution of the pile punching nozzle assembly, the inner ring of the valve seat is provided with a second step portion, and the outer wall of the valve stem at one end close to the pile punching pipeline is circumferentially provided with a limiting protrusion, the outer ring diameter of the limiting protrusion is larger than the inner ring diameter of the second step portion, and the second step portion is used to limit the movement of the limiting protrusion.

[0014] As a preferred solution of the pile punching nozzle assembly, a third step portion is provided in the assembly hole, one side of the throttle plate abuts against the third step portion, and the other side of the throttle plate abuts against an end of the valve seat close to the pile punching pipeline.

[0015] As a preferred solution of the pile punching nozzle assembly, it also includes a flange, which is arranged at an end of the assembly hole away from the pile punching pipeline, the flange has a first limiting portion, and the outer wall of the valve seat has a second limiting portion, the first limiting portion abuts against the second limiting portion to prevent the valve seat from moving in a direction away from the pile punching pipeline.

[0016] As a preferred solution of the pile driving nozzle assembly, it further includes a connecting piece, which is used to connect the flange and the mounting seat.

[0017] As a preferred solution of the pile driving nozzle assembly, it further includes a gasket, which is sleeved on the connecting member and clamped between the flange and the mounting seat.

[0018] As a preferred solution of the pile driving nozzle assembly, the ports at the other ends of the plurality of second holes are evenly spaced along the circumference of the valve stem.

[0019] Another object of the present invention is to provide an installation method for a pile driving nozzle assembly, wherein the installed pile driving nozzle assembly can prevent mud and sand blockage and ensure pile pulling efficiency.

[0020] To achieve this object, the present invention adopts the following technical solutions:

[0021] An installation method is provided for the above-mentioned pile punching nozzle assembly, the installation method comprising the following steps:

[0022] Assembly stage: Place the throttle plate in the assembly hole of the mounting seat, then sleeve the elastic member on the valve stem and place them together in the assembly hole, place the valve seat in the assembly hole, place the gasket and flange at the end of the assembly hole, and fix them with connectors until the end face of the flange is flush with the end face of the mounting seat;

[0023] Onboard installation stage: insert the pile driving nozzle assembly into the opening of the pile shoe and weld it, and weld the pile driving pipe to the mounting seat so that the pile driving pipeline is connected to the assembly hole.

[0024] Beneficial effects of the present invention:

[0025] The present invention provides a pile driving nozzle assembly, comprising a mounting seat, a throttle plate, a valve stem, and an elastic member. The mounting seat is provided with a mounting hole extending therethrough, one end of which is connected to a pile driving pipeline. The sidewall of the throttle plate is circumferentially connected to the inner wall of the mounting hole, and the throttle plate is provided with a throttle hole. The valve stem is movably disposed within the mounting hole and comprises a first sealing portion and a second sealing portion. When the valve stem is in a first position within the mounting hole, the first sealing portion seals the throttle hole, and the second sealing portion seals a port of the mounting hole away from the pile driving pipeline. A first hole and a plurality of second holes are defined within the valve stem. One end of the first hole extends therethrough, and the other end of the first hole is connected to one end of each of the plurality of second holes. The plurality of second holes extend radially along the valve stem, and the other ends of the plurality of second holes extend therethrough. When the valve stem is in a second position within the mounting hole, the throttle hole is connected to the first hole, and the second holes are connected to the outside world. The elastic member is sleeved on the valve stem, and the elastic member tends to keep the valve stem in the first position. The pile driving nozzle assembly is installed at the opening of the pile shoe. When pile pulling is required, high-pressure water flows from the pile driving pipeline into the assembly hole and presses against the first blocking portion of the valve stem through the throttle hole. The pressure of the high-pressure water offsets the elastic force of the elastic member, causing the valve stem to move toward the second position. The high-pressure water then flows through the throttle hole, the first hole, and the second hole to the outside of the assembly hole, that is, to the outer wall of the pile shoe, thereby impacting the mud and sand near the pile shoe, loosening it and preparing for the pile pulling operation. When pile pulling is not required, the valve stem is in the first position under the elastic force of the elastic member, that is, the second blocking portion blocks the end of the assembly hole, forming a first layer of blocking against external mud and sand, preventing mud and sand from entering the pile driving nozzle assembly. The first blocking portion blocks the throttle hole, forming a second layer of blocking, preventing mud and sand from further entering the pile driving pipeline, thereby ensuring the effectiveness of the pile driving system and the efficiency of pile pulling.

[0026] The present invention provides an installation method applicable to the above-mentioned pile driving nozzle assembly, the installation method comprising the following steps: an assembly phase: placing the throttle plate in the assembly hole of the mounting seat, then sleeve the elastic member on the valve stem and place both in the assembly hole, placing the valve seat in the assembly hole, placing the gasket and flange at the end of the assembly hole, and securing them with connectors until the end face of the flange is flush with the end face of the mounting seat. An onboard installation phase: inserting the pile driving nozzle assembly into the opening of the pile shoe and welding it, and welding the pile driving pipe to the mounting seat so that the pile driving pipeline is connected to the assembly hole. The pile driving nozzle assembly installed using this installation method can prevent silt blockage and ensure pile extraction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a cross-sectional view of a pile driving nozzle assembly in a first position provided by an embodiment of the present invention;

[0028] Figure 2 is a cross-sectional view of a pile driving nozzle assembly in a second position provided by an embodiment of the present invention;

[0029] Figure 3 Schematic diagram of the structure of the throttle plate provided in an embodiment of the present invention;

[0030] Figure 4 Schematic diagram of the structure of the valve stem provided by an embodiment of the present invention.

[0031] In the picture:

[0032] 1. Mounting seat; 101. Assembly hole; 11. Third step;

[0033] 2. Throttle plate; 201. Throttle hole;

[0034] 3. Valve stem; 31. First blocking portion; 32. Second blocking portion; 301. First hole; 302. Second hole;

[0035] 4. Elastic parts;

[0036] 5. Valve seat; 51. First step portion; 52. Second step portion; 53. Second position limiting portion;

[0037] 6. Flange; 61. First limiting portion;

[0038] 7. Connectors; 8. Washers;

[0039] 100. Pile driving nozzle assembly; 200. Pile shoe; 300. Pile driving pipe. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] like Figure 1-Figure 2 As shown, the pile driving nozzle assembly 100 of this embodiment includes a mounting base 1, a throttle plate 2, a valve stem 3, and an elastic member 4. Specifically, a mounting hole 101 is formed through the mounting base 1, one end of which is connected to the pile driving pipeline. The side wall of the throttle plate 2 is circumferentially connected to the inner wall of the mounting hole 101, and a throttle hole 201 is formed in the throttle plate 2. The valve stem 3 is movably disposed within the assembly hole 101 and includes a first blocking portion 31 and a second blocking portion 32. When the valve stem 3 is in the first position within the assembly hole 101, the first blocking portion 31 blocks the throttle hole 201, and the second blocking portion 32 blocks the end of the assembly hole 101 away from the pile driving pipeline. A first hole 301 and multiple second holes 302 are defined within the valve stem 3. One end of the first hole 301 extends through the valve stem 3, and the other end of the first hole 301 communicates with one end of each of the multiple second holes 302. The multiple second holes 302 extend radially along the valve stem 3 and the other ends of the multiple second holes 302 extend through the valve stem 3. When the valve stem 3 is in the second position within the assembly hole 101, the throttle hole 201 communicates with the first hole 301, and the second holes 302 communicate with the outside world. An elastic member 4 is sleeved on the valve stem 3 and has a tendency to keep the valve stem 3 in the first position. Optionally, the elastic member 4 is a spring.

[0044] like Figure 4 As shown, preferably, the ports at the other ends of the plurality of second holes 302 are evenly spaced along the circumference of the valve stem 3 to ensure that the high-pressure water flows outward in a relatively balanced manner in all directions when flowing outward from the side wall of the valve stem 3. The provision of the second holes 302 can increase the water outflow velocity there, thereby improving the impact of sediment.

[0045] The pile driving nozzle assembly 100 is installed at the opening of the pile shoe 200. When it is necessary to pull out the pile, high-pressure water flows from the pile driving pipeline into the assembly hole 101, and presses against the first blocking portion 31 of the valve stem 3 from the throttle hole 201. The pressure of the high-pressure water offsets the elastic force of the elastic member 4, and the valve stem 3 moves toward the second position. The high-pressure water then flows through the throttle hole 201, the first hole 301 and the second hole 302 to the outside of the assembly hole 101, that is, to the outer wall of the pile shoe 200, thereby impacting the mud and sand near the pile shoe 200 to loosen it and prepare for the pile pulling operation. When there is no need to pull out piles, the valve stem 3 is located in the first position under the elastic force of the elastic member 4, that is, the second blocking portion 32 blocks the port of the assembly hole 101, forming a first layer of blocking for external mud and sand, preventing mud and sand from entering the pile driving nozzle assembly 100, and the first blocking portion 31 blocks the throttle hole 201, forming a second layer of blocking, preventing mud and sand from further entering the pile driving pipeline, thereby ensuring the effectiveness of the pile driving system and the efficiency of pile pulling.

[0046] like Figure 3 As shown, preferably, a plurality of throttling holes 201 are opened on the throttle plate 2 in the circumferential direction, and the first blocking portion 31 is an annular plane, which can block a plurality of throttling holes 201 at the same time. The setting of the throttle plate 2 helps to increase the liquid pressure here, ensuring that the high-pressure water efficiently pushes the valve stem 3 to move.

[0047] Preferably, multiple throttle holes 201 are evenly spaced along the circumference of the throttle plate 2, and the sizes of the multiple throttle holes 201 are consistent to ensure that high-pressure water flows more evenly from the circumference to the first hole 301, thereby preventing the valve stem 3 from getting stuck due to uneven force when sliding up and down.

[0048] Preferably, the pile driving nozzle assembly 100 further includes a valve seat 5, which is disposed in the assembly hole 101. The valve seat 5 is a tubular structure, and a first step portion 51 is provided in the inner ring of the valve seat 5. One end of the elastic member 4 abuts against the valve stem 3, and the other end abuts against the first step portion 51, that is, the first step portion 51 is arranged toward the pile driving pipeline.

[0049] To prevent the valve stem 3 from being dislodged from the mounting seat 1 by excessive high-pressure water pressure, the valve seat 5 is preferably provided with a second step 52 within its inner ring. A stopper protrusion is circumferentially protruded from the outer wall of the end of the valve stem 3 proximal to the pile driving pipe. The outer diameter of the stopper protrusion is larger than the inner diameter of the second step 52, and the second step 52 serves to limit the movement of the stopper protrusion. In this embodiment, the stopper protrusion and the first blocking portion 31 are the same component. The surface of this portion facing the pile driving pipe seals the throttle orifice 201, while the surface facing away from the pile driving pipe protrudes from the outer wall of the valve stem 3. As the valve stem 3 moves away from the pile driving pipe 300, the edge of the stopper protrusion is blocked by the second step 52 of the valve seat 5, thereby limiting the range of movement of the valve stem 3. One end of the elastic member 4 also abuts this point. In other embodiments, the stopper protrusion and the second step 52 can also be configured with a spiral surface to increase the contact area.

[0050] Preferably, the assembly hole 101 has a third step 11, one side of the throttle plate 2 abuts against the third step 11, and the other side of the throttle plate 2 abuts against the end of the valve seat 5 near the pile driving pipe. In other words, the throttle plate 2 does not need to be fixed in the mounting base 1, which facilitates installation, removal, and replacement.

[0051] Preferably, the pile driving nozzle assembly 100 further includes a flange 6, which is arranged at the end of the assembly hole 101 away from the pile driving pipeline. The flange 6 has a first limiting portion 61, and the outer wall of the valve seat 5 has a second limiting portion 53. The first limiting portion 61 abuts against the second limiting portion 53 to prevent the valve seat 5 from moving in a direction away from the pile driving pipeline.

[0052] Preferably, the pile driving nozzle assembly 100 further includes a connector 7 for connecting the flange 6 to the mounting base 1. Optionally, the connector 7 is a hexagonal bolt, the threaded portion of which passes through a through-hole in the flange 6 and is threadedly connected to a threaded hole in the mounting base 1. The end of the bolt engages a groove at the end of the through-hole in the flange 6. When the bolt is tightened, the end surface of the flange 6 is flush with the end surface of the mounting base 1.

[0053] Preferably, the pile driving nozzle assembly 100 further includes a gasket 8, which is sleeved on the connecting piece 7 and clamped between the flange 6 and the mounting seat 1 to prevent wear and ensure sealing thereat.

[0054] The pile driving nozzle assembly 100 is suitable for use at the end of pile driving systems on various platforms and has a wide range of applications. It can be installed on the upper surface, lower surface, or side of the pile shoe 200. Multiple nozzles can be installed on different surfaces or on the same surface to ensure that all parts of the pile shoe 200 are loosened. The pile driving nozzle assembly 100 has an automatic opening and closing function. During the pile driving operation, the valve stem 3 can be opened under the action of water pressure, allowing the pile driving operation to proceed smoothly. At the end of the pile driving operation, the valve stem 3 can be automatically retracted and closed under the action of a spring, protecting the interior of the pile driving nozzle assembly 100 and the interior of the pile driving pipeline from being clogged by impurities such as mud and sand, thereby ensuring pile extraction efficiency. In addition, the pile driving nozzle assembly 100 is simple to manufacture, with readily available materials, simple assembly, and low manufacturing cost.

[0055] This embodiment also provides an installation method, which is applied to the above-mentioned pile driving nozzle assembly 100. The installation method includes the following steps:

[0056] Assembly stage: Place the throttle plate 2 in the assembly hole 101 of the mounting seat 1, then sleeve the elastic member 4 on the valve stem 3 and place them together in the assembly hole 101, place the valve seat 5 in the assembly hole 101, place the gasket 8 and flange 6 at the end of the assembly hole 101, and fix them with the connecting piece 7 until the end face of the flange 6 is flush with the end face of the mounting seat 1.

[0057] Onboard installation stage: the pile driving nozzle assembly 100 is inserted into the opening of the pile shoe 200 and welded, and the pile driving pipe 300 is welded to the mounting seat 1 so that the pile driving pipeline is connected to the assembly hole 101.

[0058] The pile driving nozzle assembly 100 installed using this installation method can prevent silt blockage and ensure pile pulling efficiency.

[0059] 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 punching nozzle assembly, characterized in that: include: A mounting seat (1), wherein an assembly hole (101) is formed through the mounting seat (1), and one end of the assembly hole (101) is connected to a pile driving pipeline; A throttle plate (2), wherein the side wall of the throttle plate (2) is circumferentially connected to the inner wall of the assembly hole (101), and a throttle hole (201) is formed on the throttle plate (2); A valve stem (3) is movably arranged in the assembly hole (101), and the valve stem (3) has a first blocking portion (31) and a second blocking portion (32). When the valve stem (3) is located in a first position in the assembly hole (101), the first blocking portion (31) blocks the throttle hole (201), and the second blocking portion (32) blocks the port of the assembly hole (101) away from the pile driving pipeline. A first hole (301) and a plurality of second holes (302) are provided in the valve stem (3). 02), one end of the first hole (301) is opened through, the other end of the first hole (301) is connected with one end of a plurality of second holes (302), the plurality of second holes (302) extend along the radial direction of the valve stem (3), the other ends of the plurality of second holes (302) are opened through, when the valve stem (3) is located in the second position in the assembly hole (101), the throttling hole (201) is connected with the first hole (301), and the second hole (302) is connected with the outside; an elastic member (4), the elastic member (4) being sleeved on the valve stem (3), the elastic member (4) having a tendency to cause the valve stem (3) to be located in the first position; A valve seat (5), the valve seat (5) is arranged in the assembly hole (101), the valve seat (5) is a tubular structure, the inner ring of the valve seat (5) is provided with a first step portion (51), one end of the elastic member (4) abuts against the valve stem (3), and the other end abuts against the first step portion (51), the inner ring of the valve seat (5) is provided with a second step portion (52), the outer wall of the valve stem (3) near the end of the pile punching pipeline is provided with a limiting protrusion, the outer ring diameter of the limiting protrusion is larger than the inner ring diameter of the second step portion (52), and the second step portion (52) is used to limit the movement of the limiting protrusion, the assembly hole (101) is provided with a third step portion (11), one side of the throttle plate (2) abuts against the third step portion (11), and the other side of the throttle plate (2) abuts against the end of the valve seat (5) near the pile punching pipeline; a flange (6), the flange (6) being arranged at an end of the assembly hole (101) away from the pile driving pipeline, the flange (6) having a first limiting portion (61), the outer wall of the valve seat (5) having a second limiting portion (53), the first limiting portion (61) being in contact with the second limiting portion (53) to prevent the valve seat (5) from moving in a direction away from the pile driving pipeline; A connecting member (7), the connecting member (7) being used to connect the flange (6) and the mounting seat (1); A gasket (8), wherein the gasket (8) is sleeved on the connecting member (7), and the gasket (8) is clamped between the flange (6) and the mounting seat (1).

2. The pile driving nozzle assembly according to claim 1, characterized in that The throttle plate (2) is provided with a plurality of throttle holes (201) along the circumferential direction, and the first blocking portion (31) is an annular plane capable of blocking the plurality of throttle holes (201) at the same time.

3. The pile driving nozzle assembly according to claim 1, characterized in that The ports at the other ends of the plurality of second holes (302) are evenly spaced along the circumference of the valve stem (3).

4. The installation method is characterized in that: Applied to the pile driving nozzle assembly according to any one of claims 1 to 3, the installation method comprises the following steps: Assembly stage: placing the throttle plate (2) in the assembly hole (101) of the mounting seat (1), then sleeve the elastic member (4) on the valve stem (3) and place them together in the assembly hole (101), placing the valve seat (5) in the assembly hole (101), placing the gasket (8) and the flange (6) at the end of the assembly hole (101), and fixing them with the connecting member (7) until the end surface of the flange (6) is flush with the end surface of the mounting seat (1); Onboard installation stage: inserting the pile driving nozzle assembly (100) into the opening of the pile shoe (200) and welding it, and welding the pile driving pipe (300) to the mounting seat (1) so that the pile driving pipeline is connected to the assembly hole (101).

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