A sealing structure for a segmented pile leg sleeve

Abstract

The utility model discloses a sectional type pile leg sleeve's sealing structure, including support sealing body, support sealing body sets up between the plug tip main column and the foundation steel pile, and a plurality of support sealing bodies constitute annular sealing structure, and support sealing body includes integrative air bag body and connecting framework, and the sidewall of air bag body is inlayed and is installed with support framework. Compared with traditional sealing structure, inlayed and installed support framework in air bag body, can strengthen the strength of whole sealing structure through the support framework that is arranged, improves the pressure -bearing capacity of whole sealing structure, when carrying out the pile insertion, the pile pulling and the grouting operation, reduces the deformation of sealing structure, avoids appearing the situation that partial gap is produced, improves the sealing effect of sealing structure.

Description

Technical Field

[0001] This utility model relates to the field of packer technology, specifically to a sealing structure for a segmented pile leg sleeve. Background Technology

[0002] Offshore platforms are working platforms built on the ocean, primarily used for the exploration, extraction, processing, and storage of resources such as oil and natural gas. Depending on their function and operating environment, offshore platforms can be categorized into various types, such as fixed platforms (e.g., jacket platforms, gravity platforms) and floating platforms (e.g., semi-submersible platforms). Fixed jacket platforms mainly consist of large steel jacket structures and foundation steel piles. During construction, the foundation steel piles are first inserted into the seabed, then the jacket is hoisted, and the jacket legs are inserted into the foundation steel piles. Subsequently, cement mortar is grouted into the foundation steel piles to enhance the stability of the connection between the jacket legs and the foundation steel piles. Passive packers are used between the jacket legs and the foundation steel piles. These packers support and seal the grouted cement mortar between the jacket legs and the foundation steel piles, preventing seawater backflow from affecting the cement mortar's fixation of the jacket legs and foundation steel piles.

[0003] To improve the sealing performance between the aforementioned jacket legs (insert main columns) and the foundation steel piles, a technical solution is disclosed in Chinese utility model patent document CN222044201U, entitled "A Support and Sealing Structure for Pile Leg Sleeves": First, a support and sealing body is used to replace the traditional passive packer to support and seal between the insert main column and the foundation steel pile. When using this utility model to support and seal between the insert main column and the foundation steel pile, fewer wrinkles are generated by the airbag body, avoiding large local gaps between the insert main column and the foundation steel pile, resulting in better support and sealing effects.

[0004] The technical solutions in the aforementioned comparative documents have the following drawbacks during use: the overall structure is made of rubber material, which is prone to deformation during the pile driving and grouting operations. The deformation of the rubber can cause gaps in local areas, affecting the overall sealing effect of the sealing structure. During grouting, cement grout will leak from the gaps, wasting raw materials and affecting the grouting effect. Utility Model Content

[0005] The purpose of this invention is to provide a sealing structure for a segmented pile leg sleeve to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sealing structure for a segmented pile leg sleeve, comprising a supporting sealing body, wherein the supporting sealing body is disposed between the insert main column and the foundation steel pile, and a plurality of the supporting sealing bodies form an annular sealing structure, wherein the supporting sealing body comprises an integrally formed airbag body and a connecting skeleton, and the supporting skeleton is embedded in the side wall of the airbag body.

[0007] Preferably, the radial cross-section of the airbag body facing the foundation steel pile is triangular or rectangular.

[0008] Preferably, the radial cross-section of the connecting frame facing the foundation steel pile is in the shape of a straight line or an L.

[0009] Preferably, one end of the supporting sealing body is integrally formed with a male connector, and the other end of the supporting sealing body is integrally formed with a female connector.

[0010] Preferably, an adhesive plate is fixedly connected to the joint of each of the supporting sealing bodies.

[0011] Preferably, a first fixing plate is fixedly connected to the inner side wall of the male connector, and a second fixing plate is fixedly connected to the outer side wall of the female connector, with a fastening screw penetrating the first fixing plate fixedly connected to the side wall of the second fixing plate.

[0012] Preferably, the top of the male connector has a first balancing hole, and the top of the female connector has a second balancing hole.

[0013] Compared with the prior art, the beneficial effects of this utility model are: a segmented pile leg sleeve sealing structure, compared with the traditional sealing structure, firstly, a support skeleton is embedded and installed in the airbag body. The support skeleton can strengthen the overall sealing structure and improve the overall pressure bearing capacity of the sealing structure. During pile insertion, pile extraction and grouting operations, the deformation of the sealing structure is reduced, and the occurrence of local gaps is avoided, thereby improving the sealing effect of the sealing structure.

[0014] Meanwhile, this invention uses a male and female connector for connection at the joint of the supporting sealing body. Furthermore, depending on the specific application environment, additional reinforcement at the joint can be selected, ensuring simplified construction steps while providing excellent reinforcement of the supporting sealing body's joint. By employing different connection and reinforcement methods, this invention can be applied to sealing environments ranging from low pressure to high pressure, high pressure, and ultra-high pressure, improving sealing stability during use. Attached Figure Description

[0015] Figure 1 This is a perspective view of the annular sealing structure formed when the cross-section of the inner airbag body of Embodiment 1 of this utility model is triangular.

[0016] Figure 2 This is a perspective view of the annular sealing structure formed when the cross-section of the inner airbag body of Embodiment 1 of this utility model is rectangular.

[0017] Figure 3 This is a schematic diagram of the cross-section of the inner support frame in Embodiment 1 of this utility model, which is shaped like a straight line.

[0018] Figure 4 This is a schematic diagram of the L-shaped cross-section of the inner support frame in Embodiment 1 of this utility model.

[0019] Figure 5 This is a schematic diagram of the supporting sealing body when the cross-section of the inner airbag body is triangular, according to Embodiment 1 of this utility model.

[0020] Figure 6 This is a schematic diagram of the supporting sealing body when the cross-section of the inner airbag body is rectangular, according to Embodiment 1 of this utility model.

[0021] Figure 7 This is a schematic diagram of the structure of the supporting sealing body after assembly with the foundation steel pile and the spigot column in Embodiment 1 of this utility model.

[0022] Figure 8 This is a schematic diagram of the supporting sealing body when the cross-section of the inner airbag body is triangular, as shown in Embodiment 2 of this utility model.

[0023] Figure 9 This is a schematic diagram of the supporting sealing body when the cross-section of the inner airbag body is rectangular, as shown in Embodiment 2 of this utility model.

[0024] Figure 10 This is a schematic diagram of the internal support skeleton when the cross-section of the inner airbag body is triangular, as shown in Embodiment 2 of this utility model.

[0025] Figure 11 This is a schematic diagram of the internal support skeleton when the cross-section of the inner airbag body is rectangular, as shown in Embodiment 2 of this utility model.

[0026] Figure 12 This is a structural schematic diagram of Embodiment 3 of the present invention.

[0027] Figure 13 This is a structural schematic diagram of the internal airbag body in Embodiment 4 of this utility model when the cross-section is triangular.

[0028] Figure 14 This is a structural schematic diagram of the inner airbag body in Embodiment 4 of this utility model when the cross-section is rectangular.

[0029] In the diagram: 1. Supporting sealing body; 11. Airbag body; 12. Connecting frame; 13. Connecting male head; 14. Connecting female head; 15. First balancing hole; 16. Second balancing hole; 2. Supporting frame; 3. Adhesive plate; 4. First reinforcing plate; 5. Second reinforcing plate; 6. Fastening screw; 7. Inserted main column; 8. Foundation steel pile. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0031] Example 1

[0032] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 This utility model provides a technical solution: a segmented pile leg sleeve sealing structure, including a supporting sealing body 1. The supporting sealing body 1 is arc-shaped, and several supporting sealing bodies 1 are evenly distributed circumferentially between the foundation steel pile 8 and the spigot main column 7. The annular structure formed by splicing several supporting sealing bodies 1 seals the space between the spigot main column 7 and the foundation steel pile 8. The several supporting sealing bodies 1 fit tightly together, so that it has a good sealing effect after being assembled between the foundation steel pile 8 and the spigot main column 7. The overall sealing structure adopts a modular design, which reduces the difficulty of processing and is more time-saving and labor-saving compared with the overall processing sealing structure. The modular design not only allows for horizontal or vertical installation in the factory or on-site, reducing the construction difficulty and the required personnel compared with the overall installation method, but also reduces the difficulty of transportation.

[0033] The supporting sealing body 1 is mainly composed of an airbag body 11 and a connecting frame 12. The airbag body 11 and the connecting frame 12 are manufactured by integral injection molding. The airbag body 11 can be made of high-quality rubber, polymer, metal and other raw materials, while the connecting frame 12 is made of metal materials, such as Q235 or Q345 or other types of stainless steel and hard non-metallic materials. Through the cooperation of the airbag body 11 and the connecting frame 12, the supporting sealing body 1 has the product characteristics of strong adhesion, corrosion resistance, impact resistance and strong destructive force. During the assembly process, the connecting frame 12 and the insert main post 7 are fixed by welding. Compared with the bolt connection fixation method of traditional fixation, the welding fixation can improve the fit between the airbag body 11 and the insert main post 7, avoid gaps between the airbag body 11 and the insert main post 7, and improve the overall sealing performance and overall strength of the structure after assembly.

[0034] like Figure 3 and Figure 4 As shown, the radial cross-section of the airbag body 11 facing the foundation steel pile 8 is triangular or rectangular. Similarly, the cross-section can also be wavy, circular, or other shapes. Here, we only use the more common triangular and rectangular shapes as examples. A support frame 2 is embedded in the side wall of the airbag body 11. The support frame 2 is also made of materials such as Q235 or Q345 or other types of stainless steel and hard non-metallic materials. The support frame 2 is embedded in the airbag body 11 during the injection molding process.

[0035] When the cross-section of the airbag body 11 is rectangular, materials such as cloth or wire can be used to replace rubber materials for molding. In this case, even if the support frame 2 is not set inside the airbag body 11, the airbag body 11 still has high hardness, which can reduce deformation during the sealing process and achieve a better sealing effect.

[0036] like Figure 3 As shown, the radial cross-section of the support frame 2 facing the foundation steel pile 8 is straight, which is adapted to the airbag body 11 with a triangular cross-section, and the upper end of the support frame 2 is curved.

[0037] like Figure 4 As shown, the radial cross-section of the support frame 2 facing the foundation steel pile 8 is L-shaped, which is adapted to the airbag body 11 with a rectangular cross-section. The two ends of the L-shaped support frame 2 are respectively curved.

[0038] Traditional sealing structures are made entirely of rubber. During the insertion of the main column 7 and subsequent grouting operations, the rubber in the sealing structure is prone to deformation, which affects the sealing effect between the main column 7 and the foundation steel pile 8. This causes cement grout to easily leak from the local deformation points, affecting the stability of the pressure between the main column 7 and the foundation steel pile 8, and affecting the fixing effect of the main column 7 within the foundation steel pile 8.

[0039] A support frame 2 is provided inside the airbag body 11. The support frame 2 can enhance the overall strength of the airbag body 11 and improve the pressure bearing capacity of the support sealing body 1. When it is assembled between the insert main column 7 and the foundation steel pile 8 for sealing, it is not easy to deform due to the insertion and grouting. It avoids the loss of cement grout from the local deformation position and improves the stability of the connection and fixation between the insert main column 7 and the foundation steel pile 8. At the same time, the end of the support frame 2 is curved to protect the airbag body 11 and prevent the support frame 2 from scratching the airbag body 11 during the insertion operation or when the insertion position is inaccurate and the pile needs to be pulled out, thereby affecting the sealing performance of the support sealing body 1.

[0040] like Figure 7 As shown, the supporting sealing body 1 is evenly arranged in a circular pattern on the side wall of the insert main column 7 to form an annular sealing structure. The connecting frame 12 is welded and fixed to the side wall of the insert main column 7. Then, the insert main column 7 is inserted into the foundation steel pile 8. The annular sealing structure formed by the supporting sealing body 1 seals the insert main column 7 and the foundation steel pile 8. Since the supporting frame 2 is set in the airbag body 11, the overall strength of the sealing structure is increased, which reduces deformation during the sealing process, thereby increasing the sealing effect between the insert main column 7 and the foundation steel pile 8.

[0041] Example 2

[0042] Please see Figure 8 , Figure 9 , Figure 10 and Figure 11 The present invention provides a technical solution that differs from the technical solution in Embodiment 1 in that: one end of the supporting sealing body 1 is integrally formed with a male connector 13, and the other end of the supporting sealing body 1 is integrally formed with a female connector 14. The dimensions of the male connector 13 and the female connector 14 are compatible. When the supporting sealing body 1 is spliced ​​into a ring-shaped sealing structure, the male connector 13 can be inserted into the female connector 14, thereby improving the strength of the connection of the supporting sealing body 1.

[0043] Traditional split-type sealing structures are prone to cracking at the joints between their individual sealing units during installation and use, leading to deformation at the joints and affecting the overall support and sealing performance of the sealing structure. By using a male connector 13 and a female connector 14 in cooperation, the joints of the annular sealing structure composed of the supporting sealing body 1 can be supported, improving the strength of the joints and enhancing the sealing effect. This embodiment is suitable for sealing situations where the submarine spigot main column 7 and the foundation steel pile 8 are located in a relatively shallow position and are subjected to low grouting pressure.

[0044] Example 3

[0045] Please see Figure 12 The technical solution provided by this utility model differs from the technical solution in Embodiment 2 in that: an adhesive plate 3 is pasted and fixed at the connection of each supporting sealing body 1. The adhesive plate 3 is made of non-metallic material, such as rubber, polymer material, and carbon fiber material. After the supporting sealing bodies 1 form an annular sealing structure, by pasting the adhesive plate 3 at the connection of each supporting sealing body 1, the connection strength of the connection of the supporting sealing bodies 1 can be further strengthened, and the connection of the supporting sealing bodies 1 can be protected to avoid cracking at the connection of the supporting sealing bodies 1 during pile insertion and extraction. This embodiment is suitable for sealing situations where the submarine anchor column 7 and the foundation steel pile 8 are located at a middle depth and can withstand high grouting pressure.

[0046] Since the adhesive plate 3 is made of non-metallic material, it has a certain deformation capability. During use, it can deform along with the supporting sealing body 1. It is suitable for different types of airbag body 11 with radial cross-sections of triangle, rectangle, wave, circle, etc.

[0047] Example 4

[0048] Please see Figure 13 and Figure 14 The difference between the technical solution provided by this utility model and the technical solution in Embodiment 2 is that: a first reinforcing plate 4 is pasted and fixed on the inner side wall of the male connector 13, and a second reinforcing plate 5 is pasted and fixed on the outer side wall of the female connector 14. The positions of the first reinforcing plate 4 and the second reinforcing plate 5 are corresponding. After the male connector 13 is inserted into the defined position in the female connector 14, a fastening screw 6 is screwed into the side wall of the second reinforcing plate 5. When the cross-section of the airbag body 11 is triangular, the first reinforcing plate 4 and the second reinforcing plate 5 are installed on the side of the airbag body 11. When the cross-section of the airbag body 11 is rectangular, the first reinforcing plate 4 and the second reinforcing plate 5 are installed at the bottom of the airbag body 11 so as not to affect the sealing effect of the airbag body 11.

[0049] The fastening screws 6, the first reinforcing plate 4, and the second reinforcing plate 5 form a more stable reinforcement structure, greatly improving the connection strength between the various supporting sealing bodies 1 and more effectively ensuring the connection stability of the supporting sealing bodies 1 during pile insertion and extraction. This embodiment is suitable for situations where the submarine anchor column 7 and the foundation steel pile 8 are located at a relatively deep position and are subjected to high-pressure grouting. When subjected to ultra-high grouting pressure, the connection can be reinforced by using the first reinforcing plate 4, the second reinforcing plate 5, the fastening screws 6, and the adhesive plate 3 in combination.

[0050] Example 5

[0051] Please see Figure 8 and Figure 9 The difference between the technical solution provided by this utility model and the technical solution in Embodiment 2 is that: a first balancing hole 15 is provided on the top of the male connector 13, and a second balancing hole 16 is provided on the top of the female connector 14. The size and opening position of the first balancing hole 15 and the second balancing hole 16 are matched. When the male connector 13 of one supporting sealing body 1 is inserted into the female connector 14 of another supporting sealing body 1, if the male connector 13 is assembled in place, the positions of the first balancing hole 15 and the second balancing hole 16 correspond. The first balancing hole 15 and the second balancing hole 16 have two functions:

[0052] Function 1: After the support sealing body 1 is connected, the assembly position of the support sealing body 1 is observed through the first balance hole 15 and the second balance hole 16. When the first balance hole 15 and the second balance hole 16 are connected, it indicates that the male connector 13 and the female connector 14 are inserted into place.

[0053] Secondly, because the male connector 13 and the female connector 14 are connected by an insertion method between the supporting sealing bodies 1, when the main column 7 is inserted into the foundation steel pile 8, the gas inside the supporting sealing body 1 is easily expanded when it is squeezed, causing the supporting sealing body 1 to deform and affecting the installation difficulty between the main column 7 and the foundation steel pile 8. By setting the first balance hole 15 and the second balance hole 16, after the supporting sealing body 1 is deformed and expanded, the excess gas inside can be discharged outward from the first balance hole 15 and the second balance hole 16. The supporting sealing body 1, after being squeezed and deformed, can still achieve the effect of support and sealing, while also reducing the installation difficulty and improving the installation efficiency.

Claims

1. A sealing structure for a segmented pile leg sleeve, characterized in that: It includes a support sealing body (1), which is disposed between the insert main column (7) and the foundation steel pile (8). Several support sealing bodies (1) form an annular sealing structure. The support sealing body (1) includes an integrally formed airbag body (11) and a connecting frame (12). The support frame (2) is embedded in the side wall of the airbag body (11).

2. A seal arrangement for a segmented pile leg sleeve as claimed in claim 1, characterised in that: The radial cross section of the airbag body (11) facing the foundation steel pile (8) is triangular or rectangular.

3. A seal arrangement for a segmented pile leg sleeve as claimed in claim 1, characterised in that: The radial section of the connecting frame (12) facing the foundation steel pile (8) is in the shape of a straight line or an L.

4. A seal arrangement for a segmented pile leg sleeve as claimed in claim 1, characterised in that: One end of the support sealing body (1) is integrally formed with a male connector (13), and the other end of the support sealing body (1) is integrally formed with a female connector (14).

5. A seal arrangement for a segmented pile leg sleeve as claimed in claim 4, characterised in that: An adhesive plate (3) is fixedly connected to the joint of each of the aforementioned support sealing bodies (1).

6. A seal arrangement for a segmented pile leg sleeve as claimed in claim 4, characterised in that: The inner wall of the male connector (13) is fixedly connected to a first fixing plate (4), and the outer wall of the female connector (14) is fixedly connected to a second fixing plate (5). The side wall of the second fixing plate (5) is fixedly connected to a fastening screw (6) that penetrates the first fixing plate (4).

7. A seal arrangement for a segmented pile leg sleeve as claimed in claim 4, characterised in that: The male connector (13) has a first balance hole (15) at its top, and the female connector (14) has a second balance hole (16) at its top.

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