Damping assembly for a vibratory pile driver

Abstract

This invention discloses a damping assembly for a vibratory pile driver, comprising an upper component and a lower component respectively connected to a crane and the vibratory pile driver. The damping assembly includes an inner shell component and an outer shell component, with the inner shell component connected to the outer shell component. The lower component is connected to an internal component of the damping assembly. The inner shell component is connected to the outer shell component. Connected between the internal component and the inner shell component are relatively elastic damping components, which stretch to different degrees depending on the weight applied to the vibratory pile driver.

Description

Technical Field

[0001] The present invention relates generally to vibratory pile drivers, and more specifically to damping mechanisms for reducing swaying and vibration of vibratory pile drivers during operation. Background Technology

[0002] Some vibratory pile drivers exhibit swaying or vibration during operation, particularly during startup and initial work, but sometimes throughout the entire operation. This effect is undesirable for both the operator and the user of such pile drivers. Various attempts have been made to induce swaying / vibration in these pile drivers during operation. One known arrangement is a damper system using elastomers, such as that shown in U.S. Patent 5,263,544 granted to White. Such arrangements include multi-stage systems using various elastomers, all designed to eliminate swaying / vibration during pile driver operation. Another device for eliminating swaying is typically a damping or damping system. In this arrangement, a solid rubber barrel-shaped component connecting two opposing plates is arranged and operates under compression. This arrangement has a positive effect on reducing pile driver swaying. An alternative to this solid rubber device is the use of an elastomer component instead of the solid rubber component, but this also requires operation under compression, which has been considered ineffective. Furthermore, if the elastomer fails in this arrangement, the load will decrease.

[0003] Therefore, an effective damping system will be advantageous in piling technology. Summary of the Invention

[0004] Therefore, a damping assembly for a piling system for piling and / or piling extraction is disclosed, the damping assembly comprising: a lower connecting member for connection to a vibratory device portion of the piling system; an upper connecting member for connection to a crane assembly for the piling system, the upper connecting member being connected to a housing of the damping assembly; an inner assembly connected to the lower connecting member, the inner assembly including a safety pin extending through an opening in the housing, wherein the damping assembly includes an inner shell connected to the housing; and a relative elastomeric damping member connected between the inner assemblies and extending to the inner shell, wherein during operation, the weight on the damping assembly causes a corresponding stretching of the relative elastomeric member, thereby reducing vibration of the piling system during operation. Attached Figure Description

[0005] Figure 1 This is a perspective view of a vibratory pile driving system, showing the damping component of the present invention;

[0006] Figure 2 This is a partial cross-sectional view of the damping component of the present invention, wherein no force is applied to the damping component;

[0007] Figure 3It is a partial sectional view of the elevation of the damping component, in which a large weight is applied to the component;

[0008] Figure 4A This is a simplified front view showing the stretching of the elastomeric component in the damping assembly without any elastomer stretching.

[0009] Figure 4B This is a simplified front view showing the elastomeric component stretched to 4 inches;

[0010] Figure 4C This is a simplified front view showing the elastomer component stretched to 14 inches. Detailed Implementation

[0011] See now Figures 1-3 The vibratory pile driver system of this invention is generally designated as 10. The system includes a conventional construction crane 12 with an extended boom 14 and crane ropes as shown in 16. At the end of the crane ropes 16 is a crane hook 19, which is connected to the damping assembly 20 of this invention via a first shackle member 22. The first hook member 22 is bolted to the housing member 24 of the damping assembly 20 via assembly 23. A second hook member 26, positioned at 90 degrees to the first hook member 22, is connected to the vibratory pile driver, which operates on piles 32 in the soil 35. Figure 1 The arrangement (including damping assembly 20) is intended to reduce, or even significantly reduce, the transmission of vibration from the vibratory pile driver to the crane ropes 16 and boom 14. See also Figure 2 and Figure 3 The second hook 26 is connected via a bolt assembly 28 to an inner assembly 38 including a pin 40. The inner assembly 38 includes an inner shell 42, which is connected to an outer shell 24. Relative elastomeric damping components 44 and 46 include inner end plates bolted to the inner assembly 38 and extending to the inner shell 42, which are also bolted to outer end plates. Elastomeric components 44 and 46 are conventional and well-known in piling machine damping technology. During piling machine operation, the relative elastomeric components 44 and 46 extend together. For convenience, the damping assembly also includes a weight-measuring scale 50, but this is not necessary for the operation of the damping assembly. In the illustrated embodiment, the scale includes weights from zero to 45 tons in 15-ton increments; it should be understood that the scale may vary in terms of the specific weight measured.

[0012] During operation, when weight is applied, the elastomer operates under shear, which is significantly different from other available damping systems with elastomers that operate under compression. The shear operation of the elastomer is an important aspect of this invention. Figure 4A , Figure 4B and Figure 4CThe tensile state of the elastomer under three weight conditions is shown. In the arrangement shown, the distance between the inner and outer end plates of the elastomer is 12.25 inches, which can be varied. Figure 4A The elastomer is shown under static (weightless) conditions. Figure 4B This demonstrates, for example, an elastomer stretched to a length of 13 inches, resulting in 4.0 inches of relative motion between internal components weighing 8 tons, and... Figure 4C The tensile state of an elastomer with 14 inches of motion is shown, as well as the 18.6-inch elongation produced by a 30-ton weight. These conditions will vary depending on the applied weight.

[0013] It is important to recognize that, with the arrangement of the present invention, if the weight causes the elastomer to tear and fail, pin 40 will descend to its lowest position within the housing, as... Figure 1 As shown, it is able to maintain connection with the vibrator so that it can continue to operate, although swaying / vibration will occur due to the lack of damping protection.

[0014] It should also be recognized that different numbers of weights 52 can be attached to the exterior of the casing, which is only shown on one side.

[0015] Therefore, the damping assembly disclosed in this invention uses an elastomer in a shear arrangement to adjust or change the swaying / vibration during the operation of a vibratory pile driver.

[0016] Although the preferred arrangement of the invention has been disclosed to accompany the description, it should be understood that various changes, modifications and substitutions may be incorporated without departing from the spirit of the invention as defined by the appended claims.

Claims

1. A damping assembly for a piling system for piling and / or piling extraction, the damping assembly comprising: A lower connecting component for connecting to the suspended part of the piling system, the suspended part operating on the pile; The upper connecting component is used to connect to the crane assembly of the piling system, and the upper connecting component is connected to the housing of the damping assembly; An internal assembly connected to a lower connecting member, the internal assembly including a safety pin extending through an opening in the housing, wherein the damping assembly includes an inner shell connected to the housing; and The relative elastomeric damping component is connected between the internal components and extends into the inner shell, wherein during operation, the weight on the damping component causes corresponding stretching of the relative elastomeric component, thereby reducing the vibration of the piling system during operation.

2. The damping component according to claim 1, characterized in that: One end plate of the elastomer component is connected to the internal assembly, and the other end plate is connected to the inner shell.

3. The damping component according to claim 1, characterized in that: If the elastomeric component fails, the safety pin falls downwards to the lower end of the opening in the housing.

4. The damping component according to claim 1, characterized in that: It also includes selected weights applied to opposite sides of the casing.

5. The damping component according to claim 1, characterized in that: The lower connecting component is positioned at a 90-degree angle to the upper connecting component.

6. The damping component according to claim 1, characterized in that: The upper and lower connecting parts are hooks and loops.

7. The damping component according to claim 1, characterized in that: The suspended weight is a vibration device.

8. A damping assembly for a crane system subjected to vibration, the damping assembly comprising: A lower connecting component for connecting to the suspended part of the piling system, the suspended part operating on the pile; The upper connecting part is used to connect to the crane rope portion of the crane assembly, and the upper connecting part is connected to the housing of the damping assembly; Lower connecting component used to connect heavy objects; An internal assembly connected to a lower connecting member, the internal assembly including a safety pin extending through an opening in the housing, wherein the damping assembly includes an inner shell connected to the housing; and The relative elastomeric damping component is connected between the internal components and extends into the inner shell, wherein during operation, the weight attached to the damping component causes corresponding stretching of the relative elastomeric component, thereby reducing the vibration of the crane system during operation.

9. The damping component according to claim 8, characterized in that: One end plate of the elastomer component is connected to the internal assembly, and the other end plate is connected to the inner shell.

10. The damping component according to claim 8, characterized in that: If the elastomeric component fails, the safety pin falls downwards to the lower end of the opening in the housing.

11. The damping component according to claim 8, characterized in that: It also includes selected weights applied to opposite sides of the casing.

12. The damping component according to claim 8, characterized in that: The lower connecting component is positioned at a 90-degree angle to the upper connecting component.

13. The damping component according to claim 8, characterized in that: The upper and lower connecting parts are hooks and loops.

Images