阅读说明：本技术 一种桩靴结构 (Pile shoe structure ) 是由 刘炎 谢继伟 席江岳 郑泽林 李遥 王羽良 万正伟 李畅哲 于 2020-06-10 设计创作，主要内容包括：本发明提供了一种桩靴结构,包括桩靴本体和钻锥本体,所述桩靴本体内部设有放置腔；所述钻锥本体包括齿靴、第一连接件和设置在所述齿靴上的第二连接件；所述齿靴适于伸入所述放置腔中,所述第二连接件与所述放置腔的内壁抵接；所述第一连接件与所述桩靴本体拆卸式连接。本发明中,桩靴本体和钻锥本体是拆卸式的结构,通过可拆卸更换的方式使桩靴结构能够适应多种海洋底部的土层条件,扩宽了桩靴的适用海域,增强经济效益；同时,第二连接件与放置腔的内壁抵接,第二连接件与桩靴本体拆卸式连接,形成了内外两道固定,增强了螺旋钻锥工作时的稳定性与可靠性。(The invention provides a pile shoe structure which comprises a pile shoe body and a drill bit body, wherein a placing cavity is arranged in the pile shoe body; the drill bit body comprises a tooth shoe, a first connecting piece and a second connecting piece arranged on the tooth shoe; the tooth shoe is suitable for extending into the placing cavity, and the second connecting piece is abutted to the inner wall of the placing cavity; the first connecting piece is detachably connected with the pile shoe body. According to the invention, the pile shoe body and the drill bit body are detachable structures, and the pile shoe structure can adapt to various soil layer conditions of the ocean bottom in a detachable and replaceable manner, so that the applicable sea area of the pile shoe is widened, and the economic benefit is enhanced; meanwhile, the second connecting piece is abutted to the inner wall of the placing cavity and detachably connected with the pile shoe body, so that an inner fixing part and an outer fixing part are formed, and the stability and the reliability of the spiral drill bit during working are enhanced.)

1. A pile shoe construction, comprising:

the pile shoe comprises a pile shoe body (1), wherein a placing cavity (121) is formed inside the pile shoe body (1);

the drill bit comprises a drill bit body (2), wherein the drill bit body (2) comprises a tooth shoe (21), a first connecting piece (22) and a second connecting piece (23) arranged on the tooth shoe (21);

the tooth shoe (21) is suitable for extending into the placing cavity (121), and the second connecting piece (23) is abutted with the inner wall of the placing cavity (121); the first connecting piece (22) is detachably connected with the pile shoe body (1).

2. The pile shoe construction according to claim 1, characterized in that the second connecting member (23) is an elastic member, which is fitted over the tooth shoe (21); the elastic member is adapted to be compressed to change the size of the outer diameter so as to urge the tooth shoe (21) and the elastic member to protrude into the placement chamber (121).

3. The pile shoe construction of claim 2, characterized in that the resilient member is a ferrule made of resilient steel and that a displacement space (231) is provided between the circumferential ends of the resilient member; when the elastic member is deformed, the size of the displacement space (231) is changed.

4. The pile shoe structure of claim 3, characterized in that both circumferential ends of the elastic member are provided with a first stopper portion (232) and a second stopper portion (233), respectively; the first limiting part (232) and the second limiting part (233) are arranged in a staggered mode along the axial direction of the drill bit body (2); when the elastic piece deforms, the first limiting part (232) and the second limiting part (233) are suitable for contacting.

5. The shoe construction according to claim 1, characterized in that the first connecting piece (22) is a flange with a first hole structure (221), and that a second hole structure (131) is provided on the shoe body (1), and that the first hole structure (221) and the second hole structure (131) are adapted to be fixed by means of a connecting piece.

6. The pile shoe structure of claim 5, characterized in that the pile shoe body (1) comprises a shoe body (11) and a connecting seat (12), the lower end of the shoe body (11) is connected with the connecting seat (12), and the interior of the connecting seat (12) is provided with the placing cavity (121).

7. The pile shoe structure of claim 6, characterized in that the pile shoe body (1) further comprises a bottom plate (13), the bottom plate (13) is fixedly connected with the connecting seat (12), and the bottom plate (13) is provided with the second hole structure (131) matched with the first hole structure (221) and an inlet (132) for the tooth shoe (21) to extend into the placing cavity (121).

8. The pile shoe construction according to claim 1, characterized in that the drill cone body (2) further comprises an upper cone (24) and a lower cone (25), the upper cone (24) and the lower cone (25) being located in turn below the first connection member (22), and the upper cone (24) and the lower cone (25) being provided with an external thread construction.

9. The pile shoe construction of claim 8, characterized in that the upper cone (24) is of narrow-top-wide configuration and the lower cone (25) is of narrow-bottom-wide configuration in the vertical direction.

10. The pile shoe construction according to claim 1, characterized by further comprising an impact device (3), the impact device (3) being arranged in the placing cavity (121) for driving the bit body (2) into vibration.

Technical Field

The invention relates to the technical field of ocean engineering, in particular to a pile shoe structure.

Background

In the ocean exploration operation, an offshore wind power installation platform is usually required to be built, and a pile leg connecting pile shoe is inserted into a seabed foundation to bear the dead weight and load of the whole platform so as to ensure the stable and safe work of the platform. In order to facilitate the insertion of the pile shoe into the seabed foundation, an inverted cone drill bit is usually arranged at the bottom end of the pile shoe, the offshore wind power installation platform is in different operation areas, and the soil condition of the offshore bottom layer may change.

Disclosure of Invention

The invention solves the problem of how to improve the applicability of the pile shoe and meet the requirements of different ocean bottom soil textures.

To solve the above problems, the present invention provides a pile shoe structure including:

the pile shoe comprises a pile shoe body, wherein a placing cavity is arranged inside the pile shoe body;

the drill bit comprises a drill bit body, a first connecting piece and a second connecting piece, wherein the drill bit body comprises a tooth shoe, the first connecting piece and the second connecting piece arranged on the tooth shoe;

the tooth shoe is suitable for extending into the placing cavity, and the second connecting piece is abutted to the inner wall of the placing cavity; the first connecting piece is detachably connected with the pile shoe body.

Optionally, the second connecting piece is an elastic piece, and the elastic piece is sleeved on the tooth shoe; the resilient member is adapted to be compressed to change the size of the outer diameter to urge the tooth shoe and the resilient member into the placement cavity.

Optionally, the elastic member is a ferrule made of elastic steel, and a displacement space is arranged between two circumferential ends of the elastic member; when the elastic member is deformed, the size of the displacement space is changed.

Optionally, a first limiting part and a second limiting part are respectively arranged at two circumferential ends of the elastic part; the first limiting part and the second limiting part are arranged in a staggered mode along the axial direction of the drill bit body; when the elastic piece deforms, the first limiting part and the second limiting part are suitable for contacting.

Optionally, the first connecting member is a flange with a first hole structure, a second hole structure is arranged on the pile shoe body, and the first hole structure and the second hole structure are suitable for being fixed through the connecting member.

Optionally, the pile shoe body includes a shoe body and a connecting seat, the lower end of the shoe body is connected with the connecting seat, and the inside of the connecting seat is provided with the placing cavity.

Optionally, the pile shoe body further includes a bottom plate, the bottom plate is fixedly connected to the connecting seat, and the bottom plate is provided with a second hole structure matched with the first hole structure, and an inlet for the tooth shoe to extend into the placing cavity.

Optionally, the drill bit body further comprises an upper cone and a lower cone, the upper cone and the lower cone are sequentially located below the first connecting piece, and the upper cone and the lower cone are both provided with external thread structures.

Optionally, in the vertical direction, the upper cone is in a configuration of being narrow at the top and wide at the bottom, and the lower cone is in a configuration of being narrow at the bottom and wide at the top.

Optionally, the drill bit further comprises a percussion device arranged in the placing cavity and used for driving the drill bit body to vibrate.

Compared with the prior art, the invention has the following beneficial effects:

the pile shoe body and the drill bit body are detachable structures, the pile shoe structure can adapt to various soil layer conditions of the ocean bottom in a detachable and replaceable mode, the applicable sea area of the pile shoe is widened, and the economic benefit is enhanced; meanwhile, the second connecting piece is abutted to the inner wall of the placing cavity and detachably connected with the pile shoe body, so that an inner fixing part and an outer fixing part are formed, and the stability and the reliability of the spiral drill bit during working are enhanced.

Drawings

FIG. 1 is a schematic structural view of a pile shoe body according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a bit body according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of another perspective view of the drill bit body according to the embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a second connecting member according to an embodiment of the present invention;

FIG. 5 is a partial cross-sectional view of a connector housing in accordance with an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a bottom plate in an embodiment of the invention.

Description of reference numerals:

1-a pile shoe body, 2-a drill cone body and 3-an impact device;

11-boot body, 12-connecting seat, 13-bottom plate, 21-tooth boot, 22-first connecting piece, 23-second connecting piece, 24-upper cone and 25-lower cone;

121-placement cavity, 131-second hole structure, 132-inlet, 221-first hole structure, 231-displacement space, 232-first limiting part, 233-second limiting part.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be understood that the forward direction of "X" in the drawings represents the front, and correspondingly, the reverse direction of "X" represents the rear; the forward direction of "Z" represents the upward direction, and correspondingly, the reverse direction of "Z" represents the downward direction, and the terms "X", "Z", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings of the specification, and are only for convenience of describing and simplifying the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The transverse dimension of the pile shoe is larger than that of the pile leg, the pile shoe can drive the pile leg to enter a soil layer so as to prevent a pile head from being damaged and a pile body from being inclined, and the pile shoe can well enter a bearing layer so as to ensure the stable and safe work of the platform. In order to facilitate the insertion of the pile shoe into the seabed foundation, an inverted cone drill bit is usually arranged at the bottom end of the pile shoe, the offshore wind power installation platform is in different operation areas, and the soil condition of the offshore bottom layer may change.

As shown in fig. 1, an embodiment of the present invention provides a pile shoe structure, which includes a pile shoe body 1 and a drill bit body 2, where a placing cavity 121 is provided inside the pile shoe body 1; the drill bit body 2 comprises a tooth shoe 21, a first connecting piece 22 and a second connecting piece 23 arranged on the tooth shoe 21; the tooth shoe 21 is suitable for extending into the placing cavity 121, and the second connecting piece 23 is abutted with the inner wall of the placing cavity 121; the first connecting member 22 is detachably connected to the shoe body 1.

After the pile shoe structure is adopted, the pile shoe body 1 and the drill bit body 2 are detachable structures, the pile shoe structure can adapt to soil layer conditions of various ocean bottoms in a detachable and replaceable mode, the applicable sea area of the pile shoe is widened, and economic benefits are enhanced; meanwhile, the second connecting piece 23 is abutted to the inner wall of the placing cavity 121, and the second connecting piece 23 is detachably connected with the pile shoe body 1, so that an inner fixing part and an outer fixing part are formed, and the stability and the reliability of the spiral drill bit during working are enhanced.

As shown in fig. 1, the bit body 2 is provided with one, and since the bottom end surface of the shoe body 1 is circular, the bit body 2 is provided at the center position of the shoe body 1. Therefore, when the pile shoe is inserted into a seabed foundation, the drill bit body 2 at the central position can be more convenient for the pile shoe body 1 to perform plugging and unplugging operation.

Specifically, the second connecting member 23 is an elastic member, and the elastic member is sleeved on the tooth shoe 21; the resilient member is adapted to be compressed to change the size of the outer diameter to urge the tooth shoe 21 and the resilient member into the placement cavity 121. Therefore, in the stretching state of the elastic element, the outer diameter dimension of the elastic element is larger than the inner diameter of the placing cavity 121; when the elastic member is urged to enter the placing cavity 121, the outer circumference of the elastic member is subjected to inward pressing force, and the outer diameter of the elastic member is reduced according to the pressing force of the placing cavity 121, so that the tooth shoe 21 and the elastic member extend into the placing cavity 121, and the fixing with the placing cavity 121 is realized by the expansion force and the friction force of the elastic member.

Specifically, the elastic member is a ferrule made of elastic steel, and a displacement space 231 is arranged between two circumferential ends of the elastic member; when the elastic member is deformed, the size of the displacement space 231 is changed. In one embodiment, the elastic member is adapted to change the size of the outer diameter through the displacement space 231. From this, both ends in the cutting ferrule circumference have the space of shifting 231, and it provides the space that the cutting ferrule warp, and when the cutting ferrule receives the extrusion, both ends in the cutting ferrule circumference are close gradually, and the space of shifting 231 reduces gradually.

Further, a first limiting part 232 and a second limiting part 233 are respectively arranged at two circumferential ends of the elastic part; the first limiting part 232 and the second limiting part 233 are arranged in a staggered manner along the axial direction of the drill bit body 2; when the elastic member deforms, the first limiting portion 232 and the second limiting portion 233 are suitable for contacting. In one embodiment, when the outer diameter of the elastic member is changed, the first limiting portion 232 and the second limiting portion 233 are in contact with each other, so that the two ends of the elastic member in the circumferential direction are not greatly displaced, and the outer diameter of the elastic member is stably reduced.

In this embodiment, the axial direction of the bit body 2 refers to: as shown in fig. 2, the direction in which the centerline α lies; when the drill bit body 2 works, the axial direction of the drill bit body is parallel to the vertical direction.

In this embodiment, the two ends of the elastic member in the circumferential direction refer to: as shown in fig. 3, the broken lines β and γ are located at the cross section, and a displacement space 231 is located between the broken lines β and γ.

First spacing portion 232 and second spacing portion 233 are made as an organic whole with the cutting ferrule, can regard as cutting ferrule circumference both ends to extend and form, as shown in fig. 4, first spacing portion 232 and second spacing portion 233 all include horizontal limit and vertical limit, and when the cutting ferrule external diameter reduced, horizontal limit between them contacted, until vertical limit between them respectively with the cutting ferrule when contacting, the external diameter of cutting ferrule can not reduce again.

Alternatively, as shown in fig. 3, the first connecting member 22 is a flange with a first hole structure 221, a second hole structure 131 is arranged on the pile shoe body 1, and the first hole structure 221 and the second hole structure 131 are suitable for being fixed through the connecting member. Therefore, the connection strength between the drill bit body 2 and the pile shoe body 1 can be enhanced in a mode of fixedly connecting the flange and the connecting piece.

In this embodiment, the first hole structure 221 and the second hole structure 131 may be through holes or threaded holes; the connecting piece is a bolt with a nut, the bolt passes through the first hole structure 221 and the second hole structure 131 and then is locked through the nut, and the first hole structure 221 and the second hole structure 131 are threaded holes in consideration of stability.

In this embodiment, the first hole structures 221 on the flange are multiple, as shown in fig. 3, multiple first hole structures 221 are provided on three concentric circumferences of the flange from inside to outside, the first hole structures 221 on each circumference are uniformly arranged, and the first hole structures 221 on different circumferences are continuously arranged in a radial direction. Therefore, the first hole structures 221 are distributed reasonably, and the connection strength between the drill bit body 2 and the pile shoe body 1 can be enhanced.

In this embodiment, as shown in fig. 2, the flange is located below the tooth shoe 21, the tooth shoe 21 is located at the center of the flange, and the first hole structure 221 is formed around the bottom of the tooth shoe 21. Meanwhile, the lower end face of the clamping sleeve is in contact with the flange. Therefore, the flange not only plays a role in connection, but also can limit the displacement of the clamping sleeve in the vertical direction.

Optionally, the pile shoe body 1 includes a shoe body 11 and a connecting seat 12, a lower end of the shoe body 11 is connected to the connecting seat 12, and the placing cavity 121 is disposed inside the connecting seat 12. Therefore, the connecting seat 12 is arranged to fix the drill bit body 2, the structure of the boot body 11 is not damaged, and the strength of the boot body 11 is prevented from being weakened.

As shown in fig. 1, an attachment socket 12 is provided at a central position of a lower end surface of the shaft 11, which is detachably attached or welded to the shaft 11, and the shaft 11 and the attachment socket 12 are welded to each other for strength. During production, the boot body 11 and the connecting seat 12 are produced separately and are fixed together finally. Therefore, the pile shoe without the drill bit can be directly improved, namely, the connecting seat 12 is welded at the center of the pile shoe, so that different drill bits can be adapted, and the cost is saved.

Optionally, as shown in fig. 1 and 6, the pile shoe body 1 further includes a bottom plate 13, the bottom plate 13 is fixedly connected to the connecting seat 12, and the bottom plate 13 is provided with the second hole structure 131 matched with the first hole structure 221, and an inlet 132 for the tooth shoe 21 to extend into the placing cavity 121. The bottom plate 13 is thereby provided to facilitate connection with the bit body 2.

In this embodiment, bottom plate 13 and connecting section 12 are welded together, and the outer edge of bottom plate 13 is convex relative to the outer edge of the lower end of connecting section 12; it can be explained that the projection of the lower end face of connecting seat 12 on the vertical plane is positioned in the projection of bottom plate 13 on the vertical plane. The second hole structure 131 on the bottom plate 13 cooperates with the first hole structure 221 on the first connector 22 to facilitate a fixed connection of the shoe body 1 and the cone body 2.

Further, as shown in fig. 2, the drill bit body 2 further includes an upper cone 24 and a lower cone 25, the upper cone 24 and the lower cone 25 are sequentially located below the first connecting member 22, and the upper cone 24 and the lower cone 25 are both provided with an external thread structure. Therefore, when the pile inserting working condition is met, the external thread structure of the lower cone 25 enables the pile shoe to reduce the resistance to soil penetration, the soil drilling capability is excellent, the problem of pile inserting side displacement is reduced, after a certain depth is reached, the pile shoe can be stably and vertically embedded into a seabed soil layer, and the stable and safe working condition of the platform is provided. During pile pulling working conditions, the external thread structure of the upper cone body 24 enables the pile shoe to reduce resistance of a seabed soil layer to the pile shoe, pile pulling speed is higher, a pile pulling process is more stable, and efficiency is higher.

In this embodiment, the lower cone 25 is located below the upper cone 24 when the shoe construction is in operation, as shown in fig. 2, with a certain distance between them.

Specifically, in the vertical direction, the upper cone 24 has a configuration that is narrow at the top and wide at the bottom, and the lower cone 25 has a configuration that is narrow at the bottom and wide at the top. Thus, the upper cone 24 has a structure with a narrow top and a wide bottom, and the resistance of the seabed soil layer to the pile shoe during pile extraction is further reduced. The lower cone 25 is narrow at the bottom and wide at the top, further reducing the penetration resistance of the pile shoe during pile insertion.

Optionally, as shown in fig. 5, a percussion device 3 is further included, and the percussion device 3 is disposed in the placing cavity 121 and is used for driving the drill bit body 2 to generate vibration. Therefore, the drill bit body 2 vibrates, so that the clamping sleeve and the placing cavity 121 can be promoted to generate relative displacement, and the drill bit body 2 is convenient to disassemble.

Specifically, the impact device 3 includes a base and a pneumatic impactor, the base is fixed on the upper end surface of the placing cavity 121, the pneumatic impactor is fixed on the base, and the air outlet of the pneumatic impactor is opposite to the upper end surface of the tooth shoe 21, so that when the impactor works, the sprayed air medium impacts the upper end surface of the tooth shoe 21, and the drill bit body 2 is enabled to vibrate.

In other embodiments, the impact device 3 has one end fixedly connected to the placing cavity 121 and the other end adapted to abut against the bit body 2, and when the impact device 3 is operated, the telescopic end thereof intermittently abuts against the bit body 2, so as to apply an impact force to the bit body 2, and the bit body 2 is caused to vibrate due to the abutting relationship between the two.

In this embodiment, the impact device 3 is disposed in the placing cavity 121, so as to achieve a good protection effect, and the impact device 3 is provided with an electric control switch, so that the working state of the impact device 3 can be switched by closing and cutting the electric control switch.

When offshore wind power mounting platform changes to different sea areas, need dismantle when changing drill bit body 2, its step is: firstly, the bolts on the flange and the bottom plate 13 are dismounted, the fixing relation between the flange and the bottom plate is released, secondly, the drill bit body 2 is vibrated, the clamping sleeve and the placing cavity 121 are enabled to generate relative displacement, the drill bit body 2 is pulled out of the connecting seat 12, finally, the drill bit bodies 2 with different shapes are replaced, and after replacement, the drill bit bodies 2 are connected and fixed again according to the connection relation, and then the drill bit can be used.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.