Buffer structure of ultra-large hydraulic hammer
By adopting a combination structure of buffer cylinder and buffer ring in the super-large hydraulic hammer, the problem of rebound energy cannot be effectively absorbed is solved, and better buffering effect and equipment stability are achieved, reducing the risk and cost of equipment damage.
Patent Information
- Application Number
- CN202422616054.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-28
AI Technical Summary
During the pile driving process, the rebound energy cannot be effectively absorbed, resulting in equipment damage and high cost. Common buffering methods are poor or easy to damage.
Multiple buffer cylinders are used as the first-stage buffer structure, and multiple buffer rings are combined as the second-stage buffer structure. The buffer ring has a metal frame and rubber material. The rebound energy is absorbed through the combination of the buffer cylinder and the buffer ring, and heat is discharged through the surface gap of the buffer ring.
Effectively absorb impact and rebound energy to improve equipment stability and service life, and reduce the damage risk and cost of buffer cylinders.
Smart Images
Figure CN223226597U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a buffer structure of an ultra-large hydraulic hammer. Background Art
[0002] The diameter of offshore wind turbine monopile foundations is currently increasing, placing increasing demands on the energy of the pile hammer. During the pile driving process, ultra-large hydraulic hammers collide elastically with the pile top through alternating impacts, generating significant energy when the hammer rebounds. This rebound requires proper management to prevent damage. The current common solution is to use multiple metal-framed rubber rings for cushioning, but this approach is ineffective, lacks heat dissipation, and cannot fully absorb the rebound energy. Using a more effective cushioning cylinder, on the other hand, is susceptible to damage and is costly. Utility Model Content
[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a buffer structure for an ultra-large hydraulic hammer, which can maximize the absorption of energy generated by the impact of the impact and the rebound force.
[0004] The purpose of the utility model is achieved as follows: a buffer structure of an ultra-large hydraulic hammer, comprising a pile cap, a replacement hammer and a hydraulic hammer; the pile cap comprises a sleeve sleeved on the top of the pile foundation, a top ring plate connected to the top of the sleeve and a truncated cone-shaped top plate connected to the inner end of the top ring plate, a retaining ring is provided in the middle of the inner wall of the sleeve of the pile cap; the replacement hammer is installed in the inner cavity of the pile cap and comprises a replacement hammer ring and a replacement hammer body; the axial cross-section of the replacement hammer ring is L-shaped and comprises a lower ring portion and an upper cylinder portion connected to the top surface of the lower ring portion, and the replacement hammer ring is installed on the retaining ring in the sleeve of the pile cap; the replacement hammer body is a truncated cone body adapted to the upper inner cavity of the pile cap, and the replacement hammer body is installed between the top plate of the pile cap and the lower ring portion of the replacement hammer ring; it is characterized in that the buffer structure also includes a plurality of buffer cylinders, anti-vibration washers and a plurality of buffer rings;
[0005] A shock absorbing cylinder with a top flange extends coaxially upward from the center of the top plate of the pile cap;
[0006] A plurality of buffer cylinders are mounted one by one in a plurality of through holes uniformly distributed around the circumference on the top ring plate of the pile cap, and the lower end surfaces of the piston rods of the plurality of buffer cylinders are in contact with the top surface of the upper cylindrical portion of the substituting ring;
[0007] The anti-vibration washer is installed at the lower end of the shock-absorbing cylinder of the pile cap, and the lower end surface of the anti-vibration washer is against the fixed top surface of the substituting body;
[0008] A plurality of buffer rings are stacked in the shock absorbing cylinder of the pile cap and are located between the anti-vibration washer and the top flange of the shock absorbing cylinder;
[0009] The hydraulic hammer includes a hammer case and a hammer core; the hammer case is connected to the top flange of the shock-absorbing cylinder of the pile cap through a bottom flange; the hammer core is arranged in the hammer case and inserted into multiple buffer rings and anti-vibration washers in the shock-absorbing cylinder of the pile cap, and the lower end surface of the hammer core is against the top surface of the substituting body.
[0010] In the above-mentioned buffer structure of the super-large hydraulic hammer, the anti-vibration washer is made of metal.
[0011] In the above-mentioned buffer structure of the super-large hydraulic hammer, a plurality of grooves are radially provided on the top surface and the bottom surface of the buffer ring.
[0012] In the above-mentioned buffer structure of the super-large hydraulic hammer, the buffer ring is a rubber ring with a metal skeleton.
[0013] The buffer structure of the super-large hydraulic hammer of the utility model has the following characteristics:
[0014] 1. Using multiple buffer cylinders as the primary buffer structure and multiple buffer rings as the secondary buffer structure, effectively reducing the rebound energy of the substitute hammer; at the same time, during the piling process, the heat generated can be discharged through the gaps between the surfaces of the buffer rings, which can effectively buffer the rebound after the heavy hammer hits, and can maximize the absorption of the energy generated by the impact of the hit and the rebound force, significantly improving the stability and service life of the entire hydraulic hammer.
[0015] 2. Compared with the use of a buffer ring alone, the utility model has a better buffering effect; it is more economical than the use of a buffer cylinder alone, and is less likely to damage the buffer cylinder. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a perspective view of a pile cap in the buffer structure of an ultra-large hydraulic hammer of the present invention;
[0017] Figure 2 This is a front view of the buffer structure of the super-large hydraulic hammer of the utility model;
[0018] Figure 3 yes Figure 2 AA view in the;
[0019] Figure 4 It is a plan view of a buffer ring in the buffer structure of an ultra-large hydraulic hammer of the present invention. DETAILED DESCRIPTION
[0020] The present invention will be further described below with reference to the accompanying drawings.
[0021] See also Figures 1 to 4The buffer structure of the super-large hydraulic hammer of the utility model includes a pile cap 1, a replacement hammer 2, a plurality of buffer cylinders 3, an anti-vibration washer 4, a plurality of buffer rings 5 and a hydraulic hammer 6.
[0022] The pile cap 1 comprises a sleeve 11 that fits over the top of the pile foundation, a top ring plate 12 connected to the top of the sleeve 11, and a frustoconical top plate 13 connected to the inner end of the top ring plate 12. A retaining ring 110 is provided in the middle of the inner wall of the sleeve 11. A shock-absorbing cylinder 14 with a top flange extends coaxially upward from the center of the top plate 13. A plurality of axial through holes are uniformly distributed on the top ring plate 12.
[0023] The substitute driving ring 2 is installed in the inner cavity of the pile cap 1 and includes a substitute driving ring 21 and a substitute driving body 22; wherein, the axial section of the substitute driving ring 21 is L-shaped and includes a lower ring portion and an upper cylindrical portion connected to the top surface of the lower ring portion; the outer diameter of the substitute driving ring 21 is adapted to the inner diameter of the sleeve 11 of the pile cap 1, and the substitute driving ring 21 is installed on the retaining ring 110 in the sleeve 11 of the pile cap 1; the substitute driving body 22 is a frustum adapted to the upper inner cavity of the pile cap 1, the bottom diameter of the substitute driving body 22 is adapted to the inner diameter of the upper cylindrical portion of the substitute driving ring 21 and is smaller than the inner diameter of the top ring plate 12 of the pile cap 1, and the substitute driving body 21 is installed between the top plate 12 of the pile cap 1 and the lower ring portion of the substitute driving ring 21.
[0024] The plurality of buffer cylinders 3 are mounted one by one in the plurality of through holes provided on the top ring plate 12 of the pile cap 1, and the lower end surfaces of the piston rods of the plurality of buffer cylinders 3 are in contact with the top surface of the vertical portion of the replacement ring 21;
[0025] The anti-vibration washer 4 is installed at the lower end of the shock-absorbing cylinder 14 of the pile cap 1, and the lower end surface of the anti-vibration washer 4 is against the top surface of the substituting body 22; the anti-vibration washer 4 is made of metal, and the axial section of the anti-vibration washer 4 is inverted L-shaped.
[0026] Multiple buffer rings 5 are stacked within the shock-absorbing cylinder 14 of the pile cap 1 and located between the anti-vibration washer 4 and the top flange of the shock-absorbing cylinder 14. The buffer rings 5 are rubber rings with a metal skeleton. Several radial grooves 50 are formed on the top and bottom surfaces of each buffer ring 5 to dissipate heat and exhaust.
[0027] The hydraulic hammer 6 includes a hammer case 61 and a hammer core 62; wherein the hammer case 61 is connected to the top flange of the shock-absorbing cylinder 14 of the pile cap 1 through a bottom flange; the hammer core 62 is arranged in the hammer case 61 and inserted into multiple buffer rings 5 and anti-vibration washers 4 in the shock-absorbing cylinder 14 of the pile cap 1, and the lower end surface of the hammer core 62 is against the top surface of the substitute hitting body 22.
[0028] The buffer structure of the super-large hydraulic hammer of the present invention adopts a two-stage buffer structure, with multiple buffer cylinders 3 serving as the first-stage buffer structure; multiple stacked buffer rings 5 serving as the second-stage buffer structure, which also play a major buffering role. During use, the rebound force of the substitute hammer 2 is first transmitted to the multiple buffer cylinders 3 of the first-stage buffer structure through the substitute hammer ring 21, causing the piston rods of the multiple buffer cylinders 3 to be compressed and absorbing part of the energy. Subsequently, the rebound force of the substitute hammer 2 is transmitted to the anti-vibration washer 4 through the substitute hammer body 22, and the anti-vibration washer 4 is transmitted to the multiple buffer rings 5 of the second-stage buffer structure. Since the buffer ring 5 is made of rubber and has a large equivalent elastic coefficient, the buffering compression amount is small, which can greatly reduce the rebound energy of the substitute hammer and avoid the hammer shell 61 from being subjected to a large counter-vibration, thereby increasing the service life of the equipment. The second-stage buffer structure also limits the compression amount of the buffer cylinder 3, indirectly protecting the buffer cylinder 3. The buffer cylinder 3 can be directly disassembled and replaced from the outside of the pile cap 1.
[0029] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by the claims.
Claims
1. A buffer structure of an ultra-large hydraulic hammer, comprising a pile cap, a replacement hammer and a hydraulic hammer; the pile cap comprises a sleeve sleeved on the top of the pile foundation, a top ring plate connected to the top of the sleeve and a truncated cone-shaped top plate connected to the inner end of the top ring plate, a retaining ring is provided in the middle of the inner wall of the sleeve of the pile cap; the replacement hammer is installed in the inner cavity of the pile cap and comprises a replacement hammer ring and a replacement hammer body; the axial cross-section of the replacement hammer ring is L-shaped and comprises a lower ring portion and an upper cylinder portion connected to the top surface of the lower ring portion, and the replacement hammer ring is installed on the retaining ring in the sleeve of the pile cap; the replacement hammer body is a truncated cone body adapted to the upper inner cavity of the pile cap, and the replacement hammer body is installed between the top plate of the pile cap and the lower ring portion of the replacement hammer ring; it is characterized in that The buffer structure further includes a plurality of buffer cylinders, anti-vibration washers and a plurality of buffer rings; A shock absorbing cylinder with a top flange extends coaxially upward from the center of the top plate of the pile cap; A plurality of buffer cylinders are mounted one by one in a plurality of through holes uniformly distributed around the circumference on the top ring plate of the pile cap, and the lower end surfaces of the piston rods of the plurality of buffer cylinders are in contact with the top surface of the upper cylindrical portion of the substituting ring; The anti-vibration washer is installed at the lower end of the shock-absorbing cylinder of the pile cap, and the lower end surface of the anti-vibration washer is against the fixed top surface of the substituting body; A plurality of buffer rings are stacked in the shock absorbing cylinder of the pile cap and are located between the anti-vibration washer and the top flange of the shock absorbing cylinder; The hydraulic hammer includes a hammer case and a hammer core; the hammer case is connected to the top flange of the shock-absorbing cylinder of the pile cap through a bottom flange; the hammer core is arranged in the hammer case and inserted into multiple buffer rings and anti-vibration washers in the shock-absorbing cylinder of the pile cap, and the lower end surface of the hammer core is against the top surface of the substituting body.
2. The buffer structure of the super-large hydraulic hammer according to claim 1, characterized in that: The anti-vibration washer is made of metal.
3. The buffer structure of the super-large hydraulic hammer according to claim 1, characterized in that: A plurality of grooves are radially formed on the top surface and the bottom surface of the buffer ring.
4. The buffer structure of the super-large hydraulic hammer according to claim 1 or 3, characterized in that: The buffer ring is a rubber ring with a metal skeleton.