Split anvil of hydraulic pile hammer

Abstract

The utility model relates to the technical field of hydraulic pile hammers, and discloses a split anvil of a hydraulic pile hammer, which comprises a main body and an expansion ring, the main body is a part hammered by a hammer core in the middle, and the main body is a conical shaft section or a shaft section with a step surface; the expansion ring is a circular ring with a step surface, or the cross section which is sectioned by the section cutting plane parallel to the central axis of the expansion ring is an arc surface, and the interior of the expansion ring is connected with the main body in an interference fit mode. After that, the temperature of the expansion ring is reduced, the expansion ring shrinks inwards and wraps the outer circle face of the main body, the main body and the expansion ring are tightly assembled together, and it is guaranteed that the overall performance and the energy transfer efficiency are not affected by a split structure.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pile hammers, in particular to a split anvil of a hydraulic pile hammer. Background Art

[0002] The hydraulic pile hammer is a device that uses the hammering principle to drive the offshore wind power pile foundation into the lower layer of the seabed. The anvil, as the core component of the hydraulic pile hammer, is mainly used to transfer energy. The anvil is located between the bottom of the hammer core and the steel pile. When the hydraulic pile hammer is working, the hammer core is lifted to a certain height under the action of hydraulic oil and then begins to fall. When the hammer core falls, it is subjected to the dual effects of downward pressure and its own gravity, generating energy to act on the anvil, and then the anvil transfers the energy to the steel pile, thus completing the piling.

[0003] At present, the latest and largest 22MW offshore wind turbine platform has been launched; it is predicted that by 2025, monopile foundations with pile top flange diameters of more than 12m and wind turbines with a single-shot capacity of 25MW will appear. As the core equipment for offshore wind power construction, the large-scale development of hydraulic pile hammers is an inevitable trend.

[0004] The large-scale development of hydraulic pile hammers does not only refer to the increase of striking energy, but also the weight and size of its core parts need to be continuously increased. However, the 7.5-meter diameter anvil is the maximum size for forging at home and abroad. Even if an in vitro forging tooling is developed, the largest integral anvil with a diameter of 8 meters can only be manufactured, which is far from meeting the large-scale development needs of offshore wind power. The manufacturing weight and size level of the anvil have become a bottleneck problem restricting the large-scale development of hydraulic pile hammers.

[0005] Therefore, it is necessary to design a split anvil of a hydraulic pile hammer to solve the above problems. Summary of the invention

[0006] The utility model aims to provide a split anvil for a hydraulic pile hammer to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: it includes a main body and an expansion ring, the main body is the middle part that is hammered by the hammer core, the main body is a tapered shaft segment or a shaft segment with a step surface, the expansion ring is a circular ring with a step surface or a circular arc surface in a cross-section parallel to the center axis of the expansion ring, and the interior of the expansion ring is connected to the main body by an interference fit.

[0008] Preferably, the main body and the expansion ring are respectively: main body A and expansion ring A, the bottom end of the main body A is provided with a drainage groove, the bottom end of the expansion ring A is provided with a drainage channel, and the drainage channel extends to the inside of the drainage groove.

[0009] Preferably, the main body A is an axis segment with a step surface, and a snap-in groove is provided at the bottom end of the main body A near the expansion ring A. A snap-in block is provided inside the expansion ring A, and the end face of the snap-in block is lower than the end face of the expansion ring A, and the snap-in groove is snap-connected with the snap-in block.

[0010] Preferably, the main body and the expansion ring are respectively: main body B and expansion ring B, the bottom end of the expansion ring B is provided with a drainage groove, the bottom end of the expansion ring B is provided with a plurality of drainage channels, and the drainage channels are connected with the drainage groove.

[0011] Preferably, the main body B is a tapered shaft segment, the expansion ring B is an arc surface when the cross section is cut with a cutting plane parallel to the central axis of the expansion ring, a through hole is opened at the top center of the expansion ring B, and the through hole is wide at the top and narrow at the bottom.

[0012] Preferably, the main body B is arranged inside the through hole.

[0013] Technical effects and advantages of the utility model:

[0014] 1. When installing the main body and the expansion ring of the utility model, the expansion ring is heated by heat installation. The expansion ring expands due to heat by utilizing the principle of thermal expansion and contraction, so that the main body can be easily installed inside the expansion ring. Afterwards, the expansion ring contracts inward when the temperature drops, so that the expansion ring covers the outer cylindrical surface of the main body, and the main body and the expansion ring are tightly assembled together to ensure that the overall performance and energy transfer efficiency are not affected by the split structure.

[0015] 2. The drainage trough of the utility model is correspondingly connected with the drainage channel, so that the utility model can be not affected by seawater during underwater piling, and the seawater can be discharged in time to avoid the seawater affecting the piling of the anvil.

[0016] 3. The utility model has a lifting hole on the side of the expansion ring, which is convenient for lifting as a single body, and can also be used for lifting the anvil as a whole, so as to facilitate the overall movement of the anvil. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the installation method of the utility model.

[0018] Figure 2 This is a schematic diagram of the structure of the expansion ring A of the utility model.

[0019] Figure 3 It is a schematic diagram of the structure of the main body A of the utility model.

[0020] Figure 4 It is a cross-sectional structural schematic diagram of the first installation method of the utility model.

[0021] Figure 5 This is a structural schematic diagram of the second installation method of the utility model.

[0022] Figure 6 This is a schematic diagram of the top structure of the second installation method of the utility model.

[0023] Figure 7 It is a schematic diagram of the bottom structure of the expansion ring B of the utility model.

[0024] Figure 8 It is a schematic diagram of the structure of the main body B of the utility model.

[0025] Figure 9 It is a cross-sectional structural schematic diagram of the second installation method of the utility model.

[0026] In the figure: 1. Main body A; 2. Expansion ring A; 3. Drainage groove; 4. Drainage channel; 5. Snap-in block; 6. Snap-in groove; 7. Main body B; 8. Expansion ring B. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] The large-scale development of hydraulic pile hammers does not only refer to the increase of striking energy, but also the weight and size of its core parts need to be continuously increased. However, the 7.5-meter diameter anvil is the maximum size for forging at home and abroad. Even if an in vitro forging tooling is developed, the largest integral anvil with a diameter of 8 meters can only be manufactured, which is far from meeting the large-scale development needs of offshore wind power. The manufacturing weight and size level of the anvil have become a bottleneck problem restricting the large-scale development of hydraulic pile hammers.

[0029] The utility model provides Figures 1 to 9 A split anvil of a hydraulic pile hammer is shown, comprising a main body and an expansion ring, wherein the main body is the middle part that is subjected to the hammering of the hammer core, the main body is a tapered shaft section or a shaft section with a step surface, the expansion ring is a circular ring with a step surface or a circular arc surface in a cross section with the cutting plane parallel to the center axis of the expansion ring, and the interior of the expansion ring is connected to the main body by an interference fit.

[0030] When in use, the main body and the expansion ring, the part in the middle of the anvil that is directly hammered by the hammer core is the main body, which is disassembled to become the shaft section, and the remaining part of the anvil is the expansion ring, and the two are connected by interference fit. There is a lifting hole on the side of the expansion ring, which is convenient for lifting as a single body, and can also be used as the lifting of the anvil as a whole.

[0031] Main body and expansion ring installation method 1

[0032] The main body and the expansion ring are respectively: a main body A1 and an expansion ring A2. A drainage groove 3 is opened at the bottom end of the main body A1, and a drainage channel 4 is opened at the bottom end of the expansion ring A2. The drainage channel 4 extends to the inside of the drainage groove 3.

[0033] When in use, the drainage groove 3 of the main body A1 is connected to the drainage channel 4 of the expansion ring A2 accordingly, so that it will not be affected by seawater during underwater piling, and the seawater can be discharged in time to avoid the seawater affecting the piling of the anvil.

[0034] The main body A1 is an axial section with a stepped surface. A snap-in groove 6 is provided at the bottom end of the main body A1 near the expansion ring A2. A snap-in block 5 is provided inside the expansion ring A2. The end face of the snap-in block 5 is lower than the end face of the expansion ring A2, and the snap-in groove 6 is snap-connected with the snap-in block 5.

[0035] When in use, the expansion ring A2 is heated, the expansion ring A2 is sleeved with the main body A1, the interior of the expansion ring A2 is sleeved with the main body A1, the clamping block 5 of the expansion ring A2 is connected to the clamping groove 6 of the main body A1, and the clamping block 5 and the clamping groove 6 are connected in a step-like manner.

[0036] Main body and expansion ring installation method 2

[0037] The main body and the expansion ring are respectively: a main body B7 and an expansion ring B8. A drainage groove 3 is opened at the bottom end of the expansion ring B8. A plurality of drainage channels 4 are opened at the bottom end of the expansion ring B8. The drainage channels 4 are connected to the drainage groove 3.

[0038] The main body B7 is a tapered shaft section, the expansion ring B8 is an arc surface when the cross section is cut with the cutting plane parallel to the central axis of the expansion ring, and a through hole is opened at the center of the top of the expansion ring B8, and the through hole is wide at the top and narrow at the bottom.

[0039] The main body B7 is disposed inside the through hole.

[0040] When in use, the expansion ring B8 is heated, and the tapered shaft end of the main body B7 is inserted into the interior of the expansion ring B8. The main body B7 is a tapered shaft section with a narrow upper end and a narrow lower end. The main body B7 is inserted into the through hole and is hammered with a hammer core to make the main body B7 connected to the expansion ring B8 by an interference fit.

[0041] In summary, when the main body and the expansion ring are installed, they are hot-installed and the expansion ring is heated. Using the principle of thermal expansion and contraction, the expansion ring expands due to the heat, making it easier to install the main body inside the expansion ring. Afterwards, the expansion ring contracts inward as the temperature drops, so that the expansion ring covers the outer cylindrical surface of the main body, and the main body and the expansion ring are tightly assembled together to ensure that the overall performance and energy transfer efficiency are not affected by the split structure.

[0042] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A split anvil for a hydraulic pile hammer, characterized in that: It includes a main body and an expansion ring, wherein the main body is the middle part that is hammered by the hammer core, the main body is a tapered shaft section or a shaft section with a step surface, the expansion ring is a circular ring with a step surface or a circular arc surface when the cross section is cut with the cutting plane parallel to the center axis of the expansion ring, and the interior of the expansion ring is connected to the main body by an interference fit.

2. The split anvil of a hydraulic pile hammer according to claim 1, wherein: The main body and the expansion ring are respectively: a main body A (1) and an expansion ring A (2); a drainage groove (3) is provided at the bottom end of the main body A (1); a drainage channel (4) is provided at the bottom end of the expansion ring A (2); and the drainage channel (4) extends into the interior of the drainage groove (3).

3. The split anvil of a hydraulic pile hammer according to claim 2, characterized in that: The main body A (1) is a shaft section with a stepped surface. A snap-fit ​​groove (6) is provided at a position near the expansion ring A (2) at the bottom end of the main body A (1). A snap-fit ​​block (5) is provided inside the expansion ring A (2). The end face of the snap-fit ​​block (5) is lower than the end face of the expansion ring A (2), and the snap-fit ​​groove (6) is snap-fitted with the snap-fit ​​block (5).

4. The split anvil of a hydraulic pile hammer according to claim 1, characterized in that: The main body and the expansion ring are respectively: a main body B (7) and an expansion ring B (8); a drainage groove (3) is provided at the bottom end of the expansion ring B (8); and a plurality of drainage channels (4) are provided at the bottom end of the expansion ring B (8); the drainage channels (4) are connected to the drainage groove (3).

5. A split anvil of a hydraulic pile hammer according to claim 4, characterized in that: The main body B (7) is a tapered shaft segment, the expansion ring B (8) is a circular arc surface when the cross section is cut with a section plane parallel to the central axis of the expansion ring, and a through hole is opened at the center of the top of the expansion ring B (8), and the through hole is wide at the top and narrow at the bottom.

6. The split anvil of a hydraulic pile hammer according to claim 5, characterized in that: The main body B (7) is arranged inside the through hole.

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