A Y-shaped packer

Abstract

This invention discloses a Y-shaped packer, relating to the field of marine jacket installation technology. The Y-shaped packer is disposed within the annular gap between the outer and inner cylinders. The packer includes: a support portion, which has an annular structure and is fixedly sleeved on the outer wall of the inner cylinder; a sealing portion, also annular, with its inner end connected to the outer wall of the support portion and its outer end inclined upwards to form an acute angle between the sealing portion and the support portion; and an expansion seal, also annular, connected to the support portion and located above the sealing portion. This invention, through the combination of the inclined support portion and the expansion seal positioned above it, achieves a secondary sealing effect on the gap between the outer and inner cylinders.

Description

Technical Field

[0001] This invention relates to the field of marine jacket installation technology, and more specifically to a Y-shaped packer. Background Technology

[0002] In the offshore wind power sector, the pile foundation fixing method is adopted. First, steel pipe piles (outer cylinder) are driven into the seabed for fixing. Then, the jacket (inner cylinder) is lifted, and the end of the jacket support leg is inserted into the port of the steel pipe pile. The jacket is then placed, leveled, and grouted. Cement grout is used to bond the steel pipe pile and the jacket support leg together. The packer mainly seals the gap between the steel pipe pile and the support leg before the cement grout solidifies, preventing the cement grout from flowing out, which would lead to poor bonding and waste of cement grout and other materials.

[0003] Currently, the main method for setting up the packer's support structure is to weld a horizontal annular plate perpendicular to the inner cylinder to the outside of the inner cylinder. The load-bearing capacity of the support structure mainly relies on the welding strength between the annular plate and the inner cylinder. For pile foundations with a small gap between the outer and inner cylinders, the support force can be guaranteed. However, when the gap between the outer and inner cylinders is too large, the amount of cement grout will also increase, causing the horizontal annular plate to yield and deform. This leads to a gap between the support plate and the inner wall of the outer cylinder, resulting in cement grout leakage and ultimately causing the support structure to fail. Furthermore, existing technologies only seal the gap between the outer and inner cylinders through the support structure, resulting in poor sealing and easy leakage of cement grout from the gap between the support structure and the inner wall of the outer cylinder, causing the packer to fail.

[0004] Therefore, how to provide a packer that can improve the support strength of the support member in the annular gap between the outer cylinder and the inner cylinder, while preventing cement slurry from leaking from the gap between the support member and the inner wall of the outer cylinder, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a Y-shaped packer, which aims to solve one of the problems in the above-mentioned background art, improve the strength of the support member and improve the sealing performance of the gap between the outer cylinder and the inner cylinder.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A Y-shaped packer, wherein the Y-shaped packer is disposed within the annular gap between the outer cylinder and the inner cylinder, the Y-shaped packer comprising:

[0008] The support part has a ring structure and is fixedly sleeved on the outer wall of the inner cylinder;

[0009] The sealing part is also ring-shaped. The inner end of the sealing part is connected to the outer wall of the support part, and the outer end of the sealing part is inclined upward so that the angle between the sealing part and the support part is acute.

[0010] An expansion seal is provided, the expansion seal having an annular structure, the expansion seal being connected to the support portion, and the expansion seal being located above the sealing portion.

[0011] Furthermore, the outer wall of the support portion has a connecting plate, and the inner end of the sealing portion is connected to the connecting plate.

[0012] Furthermore, the inner end of the sealing part has a slot, which engages with the connecting plate.

[0013] Furthermore, the outer dimensions of the sealing part are slightly larger than the outer dimensions of the outer cylinder.

[0014] Furthermore, the support part is an annular structure formed by sequentially splicing multiple support blocks, and each support block has an arc-shaped groove on its inner wall that is adapted to the inner cylinder.

[0015] Furthermore, the sealing part is a ring structure composed of multiple sealing blocks spliced ​​together in sequence, and the multiple sealing blocks are connected one-to-one with the multiple support blocks.

[0016] Furthermore, the expansion seal includes a bladder and a water-swellable core, the water-swellable core being disposed within the bladder, and the bladder being fixedly connected to the support portion.

[0017] Furthermore, the outer wall of the capsule has an annular connecting section, which is integrally formed with the capsule. The annular connecting section has a series of through holes spaced apart along its circumference. The support portion has threaded holes corresponding to the through holes. The capsule is pressed onto the support portion by a pressure plate with mounting holes.

[0018] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a Y-shaped packer. By setting the sealing part to form an acute angle with the support part, the two ends of the sealing part form support between the outer wall of the inner cylinder and the inner wall of the outer cylinder, respectively, changing the direction of the supporting force of the sealing part relative to the traditional support structure, thereby increasing the load-bearing capacity of the sealing part; at the same time, by combining the inclined support part with the expansion seal set above the support part, the effect of secondary sealing of the gap between the outer cylinder and the inner cylinder can be achieved. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 A cross-sectional view of the connection structure of the packer, outer cylinder and inner cylinder provided by the present invention;

[0021] Figure 2 Provided by the present invention Figure 1 A magnified view of part C;

[0022] Figure 3 A schematic diagram of the connection structure between the support part and the sealing part provided by the present invention;

[0023] Figure 4 A schematic diagram of the connection between the support and the sealing part provided by the present invention from another perspective;

[0024] Figure 5 This is a schematic diagram of the structure of the expansion seal provided by the present invention;

[0025] Figure 6 Provided by the present invention Figure 5 A cross-sectional view along the AA direction;

[0026] Figure 7 This is a schematic diagram of the structure of the support block provided by the present invention;

[0027] Figure 8 This is a schematic diagram of the sealing block provided by the present invention.

[0028] Wherein: 1 is the outer cylinder; 2 is the inner cylinder; 3 is the support part; 4 is the sealing part; 5 is the connecting plate; 6 is the slot; 7 is the pressure plate; 8 is the support block; 9 is the sealing block; 10 is the expansion seal; 101 is the bladder body; 102 is the water-swellable core; 11 is the annular connecting section. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] See Figure 1-8This invention discloses a Y-shaped packer, which is disposed in the annular gap between the outer cylinder 1 and the inner cylinder 2. The Y-shaped packer includes:

[0031] Support part 3 has a ring structure and is fixedly sleeved on the outer wall of inner cylinder 2;

[0032] The sealing part 4 is also in the form of a ring structure. The inner end of the sealing part 4 is connected to the outer wall of the support part 3. The outer end of the sealing part 4 is inclined upward so that the angle between the sealing part 4 and the support part 3 is acute.

[0033] The expansion seal 10 has an annular structure, is connected to the support part 3, and is located above the sealing part 4.

[0034] The inner cylinder 2 has a closed, blind-end structure at its bottom. The inner cylinder 2 and outer cylinder 1 are coaxially arranged. In offshore wind power, when constructing pile foundations, the outer cylinder 1 is a steel pipe pile, and the support part 3 is made of steel. The support part 3 is fixedly connected to the inner cylinder 2 by welding. The sealing part 4 is made of elastic material, and its end near the inner cylinder 2 is fixedly connected to the support part 3. When the inner cylinder 2 is installed inside the outer cylinder 1, the outer end of the sealing part 4 contacts the inner wall of the outer cylinder 1, changing the direction of the supporting force of the sealing part 4 relative to the traditional support structure. This increases the load-bearing capacity of the sealing part 4, enabling the support part 3 and the sealing part 4 to seal the gap between the inner cylinder 2 and the outer cylinder 1. This allows for the pouring of cement grout within the gap between the outer cylinder 1 and the inner cylinder 2, while preventing the cement grout from being poured into the gap. In addition to preventing leakage, an expansion seal 10 is provided above the sealing part 4. When the expansion seal 10 comes into contact with the seawater in the outer cylinder 1, it expands. The expanded expansion seal 10 is stretched in the annular gap between the outer cylinder 1 and the inner cylinder 2, thus achieving a seal between the inner wall of the outer cylinder 1 and the outer wall of the inner cylinder 2. This prevents cement slurry from flowing into the seabed from the gap between the outer cylinder 1 and the inner cylinder 2. In other words, the expansion seal 10 achieves a sealing function. Even if a small amount of cement slurry flows through the gap between the expansion seal 10 and the inner wall of the outer cylinder 1 or the outer wall of the inner cylinder 2, this part of the cement slurry will be blocked by the sealing part 4. The sealing part 4 achieves a secondary seal. By combining the expansion seal 10 and the Y-shaped support, a secondary seal can be achieved between the annular gap between the outer cylinder 1 and the inner cylinder 2.

[0035] In this embodiment, specifically, the expansion seal 10 includes a bladder 101 and a water-swellable core 102. The water-swellable core 102 is disposed inside the bladder 101. The bladder 101 is fixedly connected to the support part 3. The bladder 101 is flexible and water-permeable. The specific material of the bladder 101 can be a woven fabric with small pores, a woven mesh, a textile mesh, a non-woven fabric, or other water-permeable materials. The water-swellable core 102 has a high expansion coefficient in seawater. The water-swellable core 102 can be water-swellable rubber or other water-swellable materials. After expansion, it has a certain strength. After full expansion, it supports the bladder 101 and can ensure a certain strength. The bladder 101 also has a certain... The strength is such that when seawater enters the bladder 101, the seawater comes into contact with the water-swellable core 102, causing the water-swellable core 102 to expand, thereby supporting the bladder 101. The supported bladder 101 is located above the sealing part 4, and the inner side of the supported bladder 101 contacts the outer wall of the inner cylinder 2, while the outer side of the supported bladder 101 contacts the inner wall of the outer cylinder 1. This achieves the sealing of the gap between the outer cylinder 1 and the inner cylinder 2 by the expansion seal 10. After the gap between the outer cylinder 1 and the inner cylinder 2 is sealed, cement grout is poured into the gap between the outer cylinder 1 and the inner cylinder 2, so that the poured cement grout will not flow out from the gap between the outer cylinder 1 and the inner cylinder 2.

[0036] In the above embodiment, preferably, the outer wall of the bladder 101 has an annular connecting section 11, which is integrally formed with the bladder 101. The annular connecting section 11 has a series of through holes spaced at intervals along its circumference. The support portion 3 has threaded holes corresponding to the through holes. The bladder 101 is pressed onto the support portion 3 by a pressure plate 7 with mounting holes. By pressing the annular connecting section 11 onto the support portion 3 using the pressure plate 7, the connection strength between the expansion seal 10 and the support portion 3 can be ensured. Simultaneously, it also serves to position the expansion seal 10, preventing it from tilting during expansion and causing uneven sealing around the gap between the inner cylinder 2 and the outer cylinder 1.

[0037] According to some embodiments of the present invention, the outer wall of the support part 3 has a connecting plate 5, and the inner end of the sealing part 4 is connected to the connecting plate 5. Preferably, the support part 3 is composed of a vertical plate and a connecting plate 5, and the vertical plate and the connecting plate 5 are integrally formed. The vertical plate is welded to the outer wall of the inner cylinder 2. The connecting plate 5 and the vertical plate are at a certain inclination angle, which is the included angle between the sealing part 4 and the support part 3. The connecting plate 5 serves as a guide for the sealing part 4, and the sealing part 4 and the connecting plate 5 can be directly connected by bolts.

[0038] In the above embodiments, preferably, the inner end of the sealing part 4 has a slot 6, which engages with the connecting plate 5. By setting the slot 6 and the connecting plate 5, the sealing part 4 can be quickly engaged with the connecting plate 5, simplifying the connection process between the sealing part 4 and the connecting plate 5. In other embodiments, the support part 3 and the sealing part 4 can also be integrally formed.

[0039] According to some embodiments of the present invention, preferably, the outer perimeter of the sealing part 4 is slightly larger than the outer perimeter of the outer cylinder 1. This structure allows the edge of the sealing part 4 to bend upwards after the inner cylinder 2 is inserted into the outer cylinder 1, thereby ensuring that the outer edge of the sealing part 4 is in full contact with the inner wall of the outer cylinder 1, thus achieving a seal between the outer cylinder 1 and the inner cylinder 2.

[0040] In the above embodiment, the support part 3 is an annular structure formed by sequentially splicing multiple support blocks 8, and each support block 8 has an arc-shaped groove on its inner wall that is adapted to the inner cylinder 2; the sealing part 4 is an annular structure formed by sequentially splicing multiple sealing blocks 9, and the multiple sealing blocks 9 are connected one-to-one with the multiple support blocks 8. By setting both the support part 3 and the sealing part 4 to be spliced ​​from multiple units, when the inner edge of the sealing part 4 has a slot 6, it is convenient to install the sealing part 4 on the support part 3.

[0041] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A Y-shaped packer, wherein the Y-shaped packer is disposed within the annular gap between an outer cylinder and an inner cylinder, characterized in that, The Y-shaped packer includes: The support part has a ring structure and is fixedly sleeved on the outer wall of the inner cylinder; The sealing part is also ring-shaped. The inner end of the sealing part is connected to the outer wall of the support part, and the outer end of the sealing part is inclined upward so that the angle between the sealing part and the support part is acute. An expansion seal, wherein the expansion seal has an annular structure, the expansion seal is connected to the support portion, and the expansion seal is located above the sealing portion; The outer wall of the support part has a connecting plate, and the inner end of the sealing part is connected to the connecting plate. The support part is composed of a vertical plate and a connecting plate, and the vertical plate and the connecting plate are integrally formed. The vertical plate is welded to the outer wall of the inner cylinder. The connecting plate and the vertical plate are at a certain inclination angle, and the end of the connecting plate away from the support part is inclined upward.

2. The Y-shaped packer according to claim 1, characterized in that, The inner end of the sealing part has a slot, which engages with the connecting plate.

3. The Y-shaped packer according to claim 1, characterized in that, The outer dimensions of the sealing part are slightly larger than the outer dimensions of the outer cylinder.

4. The Y-shaped packer according to claim 1, characterized in that, The support part is a ring structure composed of multiple support blocks spliced ​​together in sequence, and each support block has an arc-shaped groove on its inner wall that is adapted to the inner cylinder.

5. The Y-shaped packer according to claim 4, characterized in that, The sealing part is a ring structure composed of multiple sealing blocks spliced ​​together in sequence, and the multiple sealing blocks are connected to the multiple support blocks one by one.

6. The Y-shaped packer according to claim 1, characterized in that, The expansion seal includes a bladder and a water-swellable core, the water-swellable core being disposed within the bladder, and the bladder being fixedly connected to the support portion.

7. The Y-shaped packer according to claim 6, characterized in that, The outer wall of the capsule has an annular connecting section, which is integrally formed with the capsule. The annular connecting section has a series of through holes spaced around its circumference. The support part has threaded holes corresponding to the through holes. The capsule is pressed onto the support part by a pressure plate with mounting holes.

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