CN217174767U - Diameter-variable sleeve for pile sinking - Google Patents
Diameter-variable sleeve for pile sinking Download PDFInfo
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- CN217174767U CN217174767U CN202220252283.9U CN202220252283U CN217174767U CN 217174767 U CN217174767 U CN 217174767U CN 202220252283 U CN202220252283 U CN 202220252283U CN 217174767 U CN217174767 U CN 217174767U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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Abstract
The utility model discloses a diameter-variable sleeve for pile sinking, which comprises an upper guide port, an upper guide port flange, an upper sleeve flange, a sleeve, a lower sleeve flange, a lower guide port and a guide cylinder; the upper guide opening is a conical pipe body with the outer diameter gradually reduced from top to bottom and the thickness of the pipe body unchanged, and is fixed on the upper side disc body of the flange of the upper guide opening to form an upper guide part; the upper sleeve flange, the sleeve and the lower sleeve flange are sequentially connected from top to bottom to form a sleeve part; the lower guide opening is a conical pipe body with the outer diameter gradually reduced from top to bottom and the thickness of the pipe body unchanged, and the lower guide opening and the guide cylinder are respectively fixed on the upper side and the lower side of the plate body of the lower guide opening flange to form lower guide parts; the variable-diameter sleeve for pile sinking can be used for realizing the multi-diameter steel pipe pile inserting guiding function and high adaptability only by changing the sizes of the guiding structure parts at two ends and carrying out replacement and assembly fixation according to different diameters of various engineering steel pipe piles on a construction site.
Description
Technical Field
The utility model relates to an offshore wind power construction pile sinking technical field, in particular to but reducing sleeve that pile sinking was used.
Background
The offshore wind power foundation construction is mainly characterized by being limited by sea conditions, complex working conditions, short construction window period and high difficulty, so that the guide sleeve with a reasonable structural form meets the engineering use requirements and must consider the construction efficiency, convenience and economy.
In the foundation construction project of the offshore wind power pile, the sleeve in the traditional structure form has the advantages of good structural reliability and mature construction technology, but has a plurality of limiting factors in practical use. The diameter-variable guide sleeve structure can realize smooth positioning pile insertion of the steel pipe pile on different designed pile diameter projects by replacing the guide port flange.
The domestic offshore wind power industry is developed rapidly in two years, 1.5-3.0MW wind turbines are used as main domestic offshore wind power statistics in 2017, 4.2-5.0MW is already used as a main machine of the domestic offshore wind power in 2019, and more than 6.0MW wind turbines are generally used in the south China sea area in 2020. As wind power projects continuously move to deep water, the application range of multi-pile multi-diameter steel pile foundations is continuously increased, pile diameters of pile group foundations are all used within the range of 2-5m to 5m, requirements on the application universality of pile sinking positioning frames are provided, the length of a positioning frame matched with each pile diameter is long when the positioning frame is manufactured independently, the manufacturing cost is high, the problem is not practical, the problem is well solved due to the appearance of the reducing guide sleeve, the offshore wind power pile group foundation construction efficiency is better met, and the market demand of construction cost is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a but, reducing sleeve that pile sinking was used that is suitable for multiple stake footpath steel-pipe pile sinking function.
Therefore, the utility model discloses technical scheme as follows:
a variable diameter sleeve for pile sinking comprising:
the upper guide opening is a conical pipe body with the outer diameter gradually reduced from top to bottom and the thickness of the pipe body unchanged, and the inner diameter of the bottom end of the pipe body is slightly larger than the outer diameter of the constructed steel pipe pile;
the upper guide port flange is composed of a first flange plate and a first reinforcing connecting plate group; the first flange plate is horizontally arranged below the upper guide port, so that the bottom end of the pipe body of the upper guide port is welded and fixed at the edge of the central through hole of the first flange plate; the first reinforcing connecting plate group is composed of a plurality of first reinforcing connecting plates which are radially and uniformly distributed in a mode of being vertical to the disc surface of the first flange disc along the circumferential direction, and each first reinforcing connecting plate is respectively fixed with the first flange disc and the outer wall of the upper guide opening;
the upper sleeve flange is composed of a second flange plate and a second reinforcing connecting plate group; the second flange plate is horizontally arranged below the upper guide opening flange and is detachably fixed with the first flange plate into a whole through a plurality of bolts uniformly distributed along the circumferential direction; the second reinforcing connecting plate group is composed of a plurality of second reinforcing connecting plates which are radially and uniformly distributed in a mode of being vertical to the disc surface of the second flange disc along the circumferential direction, and each second reinforcing connecting plate is fixed on the lower disc surface of the second flange disc;
the sleeve is composed of a cylinder body and a third reinforcing connecting plate group; the top end of the cylinder is fixed at the outer edge of the lower disc surface of the second flange disc, and the inner wall of the top end of the cylinder is fixed with the adjacent side of each second reinforced connecting plate; the third reinforced connecting plate group consists of a plurality of third reinforced connecting plates which are uniformly distributed and fixed on the inner wall of the cylinder body along the circumferential direction in a mode of being vertical to the inner wall of the cylinder body;
the lower sleeve flange is composed of a third flange disc and a fourth reinforcing connecting plate group; the third flange plate is horizontally arranged and fixed at the bottom end of the cylinder body; the fourth reinforcing connecting plate group is composed of a plurality of fourth reinforcing connecting plates which are radially and uniformly distributed in a mode of being vertical to the disc surface of the third flange disc along the circumferential direction, and each fourth reinforcing connecting plate is respectively fixed with the third flange disc and the inner wall of the cylinder body;
the lower guide opening flange is composed of a fourth flange plate and a fifth reinforcing connecting plate group; the fourth flange plate is horizontally arranged below the lower sleeve flange and is detachably fixed with the third flange plate into a whole through a plurality of bolts uniformly distributed along the circumferential direction; the fifth reinforcing connecting plate group is composed of a plurality of fifth reinforcing connecting plates which are radially and uniformly distributed in a mode of being vertical to the disc surface of the fourth flange disc along the circumferential direction, and each fifth reinforcing connecting plate is fixed on the upper disc body of the fourth flange disc;
the lower guide opening is a conical pipe body with the outer diameter gradually reduced from top to bottom and the thickness of the pipe body unchanged, and the inner diameter of the bottom end of the lower guide opening is slightly larger than the outer diameter of the constructed steel pipe pile; the bottom end of the lower guide opening is fixed at the inner edge of the upper disc surface of the fourth flange disc and is fixed with each fifth reinforcing connecting plate.
Furthermore, the sizes of the second flange plate, the sleeve and the third flange plate are adapted to the steel pipe pile with the pile diameter of 5 m; based on the outer diameter D of the constructed steel pipe pile, the inner diameter of the top end of the upper guide opening is D +0.8 m-D +1m, the inner diameter of the bottom end of the upper guide opening is D +0.01 m-D0 +0.03m, and the axial height of the upper guide opening is 0.3-0.6 m; the outer diameter of the first flange plate is matched with the size of the second flange plate, and the inner diameter of the central hole is consistent with the inner diameter of the bottom end of the upper guide port; the outer diameter of the fourth flange plate is matched with the size of the third flange plate, and the inner diameter of the central hole is consistent with the inner diameter of the bottom end of the upper guide opening; the top end inner diameter of the lower guide opening is D +0.3 m-D +0.5m, the bottom end inner diameter is consistent with the bottom end inner diameter of the upper guide opening, and the axial height is 0.3-0.6 m.
Furthermore, the diameter-variable sleeve for pile sinking also comprises a guide cylinder, wherein the guide cylinder is a cylindrical cylinder body of which the top end is fixed on the lower disc surface of the fourth flange plate; the upper inner wall of the guide cylinder is processed into a lower guide conical surface which has the same taper with the inner wall of the lower guide opening and can be jointed into a whole, the middle part of the guide cylinder is processed into a vertical transition section with the inner diameter slightly larger than the outer diameter of the construction steel pipe pile, and the lower inner wall of the guide cylinder is processed into a lower guide conical surface with the inner diameter gradually increasing from top to bottom.
Further, the inner diameter of the vertical transition section of the inner wall of the guide cylinder is consistent with the inner diameter of the bottom end of the upper guide opening.
Furthermore, an annular reinforcing plate is welded and fixed on the upper outer wall and the lower outer wall of the cylinder respectively.
Compared with the prior art, the diameter-variable sleeve for pile sinking is suitable for pile inserting guiding of foundation steel pipe piles with multiple projects and different diameters, can be put into use immediately on a construction site according to different diameters of the engineering steel pipe piles by only changing the sizes of the guiding structure parts at the two ends and carrying out replacement, assembly and fixation, achieves pile inserting guiding of the steel pipe piles with multiple diameters, is high in adaptability, and is particularly suitable for wind power foundation construction of the piles in south China sea.
Drawings
Fig. 1 is a schematic structural view of a variable diameter sleeve for pile sinking of the present invention;
fig. 2 is a top view of the variable diameter sleeve for pile sinking of the present invention;
fig. 3 is a bottom view of the variable diameter sleeve for pile sinking of the present invention;
fig. 4 is a partial enlarged view of the connection mode between the upper guide port and the upper guide port flange of the variable diameter sleeve for pile sinking of the present invention;
fig. 5 is a partial enlarged view of the connection mode among the lower guide port, the lower guide port flange and the guide cylinder of the variable diameter sleeve for pile sinking of the present invention;
fig. 6 is a schematic structural view of the upper sleeve flange, the sleeve and the lower sleeve flange of the variable-diameter sleeve for pile sinking of the present invention.
Detailed Description
The present invention will be further described with reference to the following drawings and specific examples, but the following examples are by no means limiting the present invention.
Example 1
As shown in fig. 1, the variable diameter sleeve for pile sinking comprises an upper guide port 1, an upper guide port flange 2, an upper sleeve flange 3, a sleeve 4, a lower sleeve flange 5, a lower guide port flange 6, a lower guide port 7 and a guide cylinder 8; wherein the content of the first and second substances,
the upper guide opening 1 is a conical pipe body with the outer diameter gradually reduced from top to bottom and the thickness of the pipe body unchanged; specifically, the inner diameter of the top end of the conical pipe body is 5m, the inner diameter of the bottom end of the conical pipe body is 4.02m, and the axial length of the conical pipe body is 0.6 m;
as shown in fig. 2, the upper guiding port flange 2 is composed of a first flange plate 201 and a first reinforcing connecting plate group; specifically, the first flange 201 is a flange with an outer diameter of 5.44m and a central hole with an inner diameter of 4.02m, and is horizontally arranged, so that the bottom end of the pipe body of the upper guide port 1 is welded and fixed at the edge of the central through hole of the first flange 201, and the first flange 201 and the first flange are connected into a whole; the first reinforcing connecting plate group is composed of sixteen first reinforcing connecting plates 202 which are radially and uniformly distributed in a mode of being perpendicular to the disc surface of the first flange plate 201 along the circumferential direction, the bottom surface of each first reinforcing connecting plate 202 is welded and fixed on the upper disc surface of the first flange plate 201, a single-side groove is arranged on the side adjacent to the upper guide opening 1 in a communicated mode and is welded and fixed on the outer wall of the upper guide opening 1, and as shown in fig. 4, the connecting strength between the upper guide opening 1 and the upper guide opening flange 2 is enhanced;
the upper sleeve flange 3 is composed of a second flange plate 301 and a second reinforcing connecting plate group; specifically, the second flange plate 301 is a flange plate with an outer diameter of 5.44m and an inner diameter of 5.04m, is horizontally arranged, and is detachably fixed with the first flange plate 201 into a whole through a plurality of bolts uniformly distributed along the circumferential direction; the second reinforcing connecting plate group is composed of sixteen second reinforcing connecting plates 302 which are radially and uniformly distributed in a manner of being perpendicular to the disc surface on one side of the second flange plate 301 along the circumferential direction, and the top surface of each second reinforcing connecting plate 302 is welded and fixed at the outer edge of the lower disc surface of the second flange plate 301;
as shown in fig. 6, the sleeve 4 is composed of a cylinder 401 and a third reinforcing connecting plate group; specifically, the cylinder 401 is a cylindrical cylinder with an outer diameter of 5.5m and an inner diameter of 5.2m, the top surface of the cylindrical cylinder is welded at the outer edge of the lower disc surface of the second flange 301, and meanwhile, the inner wall of the top end of the cylindrical cylinder is welded and fixed with the adjacent sides of the sixteen second reinforcing connecting plates 302 into a whole, so that the connecting strength between the upper sleeve flange 3 and the sleeve 4 is enhanced; the third reinforcing connecting plate group is composed of sixteen third reinforcing connecting plates 402 which are uniformly distributed along the circumferential direction in a mode of being perpendicular to the inner wall of the cylinder 401, and one side of each third reinforcing connecting plate 402 is welded and fixed on the inner wall of the cylinder 401; the radial width of the third reinforcing connecting plate 302 is 0.16m, so that the inner diameter of an annular structure formed by the sixteen third reinforcing connecting plates 402 is at least 5.04 m; in addition, in order to prevent the inner size of the cylinder 401 from changing due to the deformation of the side wall in the construction process, an annular reinforcing plate is welded and fixed on the upper outer wall and the lower outer wall of the cylinder 401 respectively;
the lower sleeve flange 5 is composed of a third flange plate 501 and a fourth reinforcing connecting plate group; specifically, the third flange plate 501 is a flange plate with an outer diameter of 5.44m and an inner diameter of 5.04m, is horizontally arranged, and is welded and fixed with the bottom end of the cylinder (401) at the outer edge thereof into a whole; the fourth reinforcing connecting plate group is composed of sixteen fourth reinforcing connecting plates 502 which are radially and uniformly distributed in a mode of being perpendicular to one disc surface of the third flange plate 501 along the circumferential direction, and the bottom surface of each fourth reinforcing connecting plate 502 is welded and fixed on the upper disc surface of the third flange plate 501 and the side adjacent to the inner wall of the cylinder 401 is welded and fixed on the inner wall of the cylinder 401;
as shown in fig. 3, the lower guiding opening flange 6 is composed of a fourth flange 601 and a fifth reinforcing connecting plate group; specifically, the fourth flange 601 is a flange with an outer diameter of 5.44m and an inner diameter of a central hole of 4.02m, is horizontally arranged, and is detachably fixed with the third flange 501 into a whole through a plurality of bolts uniformly distributed along the circumferential direction; the fifth reinforcing connecting plate group is composed of sixteen fifth reinforcing connecting plates 602 which are radially and uniformly distributed in a manner of being perpendicular to the disc surface on one side of the fourth flange 601 along the circumferential direction, and the bottom surface of each fifth reinforcing connecting plate 602 is welded and fixed at the position of the fourth flange 601;
as shown in fig. 1, the lower guiding opening 7 is a tapered tube body with gradually reduced outer diameter from top to bottom and constant tube body thickness; specifically, the inner diameter of the top end of the conical pipe body is 4.5m, the inner diameter of the bottom end of the conical pipe body is 4.02m, and the axial length of the conical pipe body is 0.3 m; the lower guiding port 7 is arranged above the fourth flange 601, the bottom end of the lower guiding port is welded and fixed at the inner edge of the upper disc surface of the fourth flange 601, and meanwhile, the outer wall of the lower guiding port is welded and fixed with single-side grooves arranged at the adjacent sides of the fifth reinforcing connecting plates 602 into a whole, as shown in fig. 5, so that the connecting strength between the lower guiding port 7 and the lower guiding port flange 6 is enhanced;
as shown in fig. 1, the guide cylinder 8 is a cylindrical cylinder with an outer diameter of 5.5m, the top end of the guide cylinder is welded and fixed on the lower disc surface of the fourth flange plate 601, the inner wall of the upper part of the guide cylinder 8 is processed into a vertical transition section with an inner diameter of 4.02m, and the inner wall of the lower part of the guide cylinder is processed into a lower guide conical surface with an inner diameter gradually increasing from top to bottom, so as to facilitate pile insertion.
The diameter-variable sleeve for pile sinking can be widely applied to construction of steel pipe piles with 5m pile diameters and 4m pile diameters, and the diameter of a flange of a guide opening can be adjusted according to different diameters of various engineering steel pipe piles. When the pile is used for 5m pile diameter construction, the upper sleeve flange 3, the sleeve 4 and the lower sleeve flange 5 are assembled, welded and fixed, and then the pile can be put into use; when the device is used for construction with a pile diameter of 4m, the device can be put into use after the upper guide port 1, the upper guide port flange 2, the upper sleeve flange 3, the sleeve 4, the lower sleeve flange 5, the lower guide port flange 6, the lower guide port 7 and the guide cylinder 8 are assembled and welded and fixed.
As a preferable technical solution of this embodiment, on the basis of the above embodiment, according to the construction requirement, a set of upper guiding opening 1, upper guiding opening flange 2, lower guiding opening flange 6, lower guiding opening 7 and guiding cylinder 8 suitable for the construction of the steel pipe pile switched to 4m pile diameter may be configured, so that the size tool for matching the diameter-variable sleeve for pile sinking with the steel pipe pile of the current pile diameter (5m pile diameter, 4m pile diameter or 3m pile diameter) at any time according to the requirement in the construction site can be realized; specifically, for a steel pipe pile with a pile diameter of 3m, the structures of the upper guiding port 1, the upper guiding port flange 2, the lower guiding port flange 6, the lower guiding port 7 and the guiding cylinder 8 which are adapted to the steel pipe pile are unchanged, but the sizes of the steel pipe pile need to be adjusted correspondingly, which is specifically as follows: the inner diameter of the top end of the conical pipe body of the upper guide opening 1 is 5m, the inner diameter of the bottom end of the conical pipe body is 3.02m, and the axial length of the conical pipe body is 0.6 m; the first flange plate 201 of the upper guiding opening flange 2 and the fourth flange plate 601 of the lower guiding opening flange 6 are both flange plates with the diameter of 5.44m and the inner diameter of a central hole of 3.02 m; the inner diameter of the top end of the conical pipe body of the lower guide opening 7 is 4.5m, the inner diameter of the bottom end of the conical pipe body is 3.02m, and the axial length of the conical pipe body is 0.3 m; the intermediate section of the guide cylinder 8 has an inner diameter of 3.02 m.
In the embodiment, each welding position adopts a deep fusion welding mode, and is polished to be smooth; meanwhile, the upper guide port flange 2 and the upper sleeve flange 3 and the lower sleeve flange 5 and the lower guide port flange 6 are connected by adopting corrosion-resistant, shear-resistant and high-strength bolts, and are screwed in place through three steps of screwing, re-screwing and final screwing at intervals.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention all still fall within the scope of the technical solution of the present invention.
Claims (5)
1. A variable diameter sleeve for pile sinking, comprising:
the upper guide opening (1) is a conical pipe body with the outer diameter gradually reduced from top to bottom and the thickness of the pipe body unchanged, and the inner diameter of the bottom end of the conical pipe body is larger than the outer diameter of the constructed steel pipe pile;
the upper guide port flange (2) is composed of a first flange plate (201) and a first reinforcing connecting plate group; the first flange plate (201) is horizontally arranged below the upper guide port (1), so that the bottom end of the pipe body of the upper guide port (1) is fixedly welded at the edge of the central through hole of the first flange plate (201); the first reinforcing connecting plate group is composed of a plurality of first reinforcing connecting plates (202), the first reinforcing connecting plates are radially and uniformly distributed in a mode of being vertical to the disc surface of the first flange plate (201) along the circumferential direction, and each first reinforcing connecting plate (202) is fixed with the upper disc surface of the first flange plate (201) and the outer wall of the upper guide opening (1) respectively;
the upper sleeve flange (3) is composed of a second flange plate (301) and a second reinforcing connecting plate group; the second flange plate (301) is horizontally arranged below the upper guide opening flange (2) and is detachably fixed with the first flange plate (201) into a whole through a plurality of bolts uniformly distributed along the circumferential direction; the second reinforcing connecting plate group is composed of a plurality of second reinforcing connecting plates (302), the second reinforcing connecting plates are radially and uniformly distributed in a mode of being vertical to the disk surface of the second flange plate (301) along the circumferential direction, and each second reinforcing connecting plate (302) is fixed on the lower disk surface of the second flange plate (301);
a sleeve (4) which is composed of a cylinder (401) and a third reinforcing connecting plate group; the top end of the cylinder (401) is fixed at the outer edge of the lower disc surface of the second flange disc (301), and the inner wall of the top end of the cylinder is fixed with the adjacent side of each second reinforcing connecting plate (302); the third reinforcing connecting plate group is composed of a plurality of third reinforcing connecting plates (402), which are uniformly distributed and fixed on the inner wall of the cylinder (401) along the circumferential direction in a manner of being vertical to the inner wall of the cylinder (401);
the lower sleeve flange (5) is composed of a third flange plate (501) and a fourth reinforcing connecting plate group; the third flange plate (501) is horizontally arranged and fixed at the bottom end of the cylinder body (401); the fourth reinforcing connecting plate group is composed of a plurality of fourth reinforcing connecting plates (502), the fourth reinforcing connecting plates are radially and uniformly distributed in a mode of being perpendicular to the disc surface of the third flange disc (501) along the circumferential direction, and each fourth reinforcing connecting plate (502) is fixed with the third flange disc (501) and the inner wall of the cylinder body (401) respectively;
the lower guide opening flange (6) is composed of a fourth flange plate (601) and a fifth reinforcing connecting plate group; the fourth flange plate (601) is horizontally arranged below the lower sleeve flange (5) and is detachably fixed with the third flange plate (501) into a whole through a plurality of bolts uniformly distributed along the circumferential direction; the fifth reinforcing connecting plate group is composed of a plurality of fifth reinforcing connecting plates (602), the fifth reinforcing connecting plates are radially and uniformly distributed in a mode of being vertical to the disc surface of the fourth flange plate (601) along the circumferential direction, and each fifth reinforcing connecting plate (602) is fixed on the upper disc surface of the fourth flange plate (601);
the lower guide opening (7) is a conical pipe body with the outer diameter gradually reduced from top to bottom and the thickness of the pipe body unchanged, and the inner diameter of the bottom end of the lower guide opening is larger than the outer diameter of the constructed steel pipe pile; the bottom end of the lower guide opening (7) is fixed at the inner edge of the upper disc surface of the fourth flange disc (601) and is fixed with each fifth reinforcing connecting plate (602).
2. The variable diameter sleeve for pile sinking according to claim 1, wherein the second flange (301), the sleeve (4) and the third flange (501) are sized to fit a steel pipe pile with a pile diameter of 5 m; based on the outer diameter D of the constructed steel pipe pile, the inner diameter of the top end of the upper guide opening (1) is D +0.8 m-D +1m, the inner diameter of the bottom end of the upper guide opening is D +0.01 m-D0 +0.03m, and the axial height of the upper guide opening is 0.3-0.6 m; the outer diameter of the first flange plate (201) is matched with the size of the second flange plate (301), and the inner diameter of a central hole is consistent with the inner diameter of the bottom end of the upper guide opening (1); the outer diameter of the fourth flange plate (601) is matched with the size of the third flange plate (501), and the inner diameter of a central hole is consistent with the inner diameter of the bottom end of the upper guide opening (1); the top end inner diameter of the lower guide opening (7) is D +0.3 m-D +0.5m, the bottom end inner diameter is consistent with the bottom end inner diameter of the upper guide opening (1), and the axial height is 0.3-0.6 m.
3. A sleeve of variable diameter for pile sinking according to claim 1, further comprising a guide cylinder (8) which is a cylindrical cylinder having a top end fixed to a lower disc surface of the fourth flange (601); the upper inner wall of the guide cylinder (8) is processed into a lower guide conical surface which has the same taper with the inner wall of the lower guide opening (7) and can be jointed into a whole, the middle part of the guide cylinder is processed into a vertical transition section with the inner diameter larger than the outer diameter of the construction steel pipe pile, and the lower inner wall of the guide cylinder is processed into a lower guide conical surface with the inner diameter gradually increasing from top to bottom.
4. A sleeve of variable diameter for pile sinking according to claim 1, wherein the inner diameter of the vertical transition of the inner wall of the guide cylinder (8) coincides with the inner diameter of the bottom end of the upper pilot port (1).
5. A variable diameter sleeve for pile sinking according to claim 1, wherein an annular reinforcing plate is welded to each of the upper and lower outer walls of the cylindrical body (401).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220252283.9U CN217174767U (en) | 2022-02-08 | 2022-02-08 | Diameter-variable sleeve for pile sinking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220252283.9U CN217174767U (en) | 2022-02-08 | 2022-02-08 | Diameter-variable sleeve for pile sinking |
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| Publication Number | Publication Date |
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| CN217174767U true CN217174767U (en) | 2022-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220252283.9U Active CN217174767U (en) | 2022-02-08 | 2022-02-08 | Diameter-variable sleeve for pile sinking |
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| Country | Link |
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| CN (1) | CN217174767U (en) |
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2022
- 2022-02-08 CN CN202220252283.9U patent/CN217174767U/en active Active
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