Pile hammer stabilizer

Abstract

This utility model discloses a pile clamping and stabilizing device for a pile driver, comprising a pile clamping cylinder. At least two fixed wedges are installed on the inner wall of the cylinder, and a pile clamping slider is slidably supported on each fixed wedge. The sliding contact surfaces of the fixed wedges and the pile clamping slider are inclined. A slider driving device is hinged to the pile clamping slider. Two to four fixed wedges are installed on the inner wall of the cylinder. T-slots are provided on the sliding surfaces of the fixed wedges, and T-shaped guide blocks are fixedly installed on the pile clamping slider, slidingly engaging the T-slots of the fixed wedges. Clamping inserts are embedded on the clamping surface of the pile clamping slider. The slider driving device includes a hydraulic cylinder and a compression spring. This pile clamping and stabilizing device not only eliminates the need for a hammer frame during construction but also effectively stabilizes the pile head for accurate hammering of the pile, making it particularly suitable for pile foundation construction in ports, bridges, docks, and marine engineering projects.

Description

Technical Field

[0001] This utility model relates to a pile driving hammer for building pile foundation construction, and more particularly to a device installed at the lower end of the pile driving hammer for clamping piles. Background Technology

[0002] Pile foundation construction is a crucial step in building foundations, bridge foundations, marine engineering, port and wharf construction, and offshore wind power projects. The pile driver is used to drive piles into the ground to ensure they reach a predetermined depth and enhance the soil's bearing capacity. Typically, the pile driver relies on a pile frame for support during pile driving. The pile frame not only supports the pile driver but also guides the pile's direction and adjusts its position. Therefore, in current construction practices, the pile driver cannot function without the support of the pile frame.

[0003] However, in specific locations such as ports, bridges, docks, and marine engineering projects, the lack of stable locations for installing pile driving frames often makes it difficult to install them, or the installation cost of the hammer frame is too high, making it impossible to use pile driving hammers for pile driving operations at these sites. Therefore, in recent years, suspended pile driving hammers have emerged. These hammers use an extended crane boom to lift the hammer from the top and place it on top of the pile for driving. However, because these hammers lack the support and guidance of a pile frame, they often cannot drive stably along the centerline of the pile, resulting in deviated impacts. This not only prevents accurate pile insertion into the foundation, leading to pile tilting, but also increases the risk of pile head bursting and reduced pile driving efficiency. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a pile driver clamping and stabilizing device that not only eliminates the need for a hammer frame for construction work, but also effectively stabilizes the pile head to accurately hammer the pile body.

[0005] To solve the above-mentioned technical problems, the present invention provides a pile clamping and stabilizing device for a pile driving hammer, comprising a pile clamping cylinder, wherein at least two fixed wedges are installed on the inner wall of the pile clamping cylinder, and a pile clamping slider is slidably supported on each of the fixed wedges, and the sliding contact surfaces of the fixed wedges and the pile clamping slider are inclined; a slider driving device is hinged on the pile clamping slider.

[0006] With the above structure, a wedge-clamping slider pair, consisting of a fixed wedge and a clamping slider, is installed on the inner wall of the pile clamping device. When the slider driving device drives the clamping slider to slide downwards, the clamping slider clamps the head of the pile extending into the pile clamping device, thus stably fixing the pile hammer, which is fixedly installed at the top of the pile clamping hammer device, to the pile head position. This provides support and stability for the pile hammer, allowing the pile driving operation to be completed without relying on a pile frame. This simplifies the structure of the pile driver and is more suitable for hoisting operations without a pile frame. When pile driving is finished, the slider driving device drives the clamping slider to slide upwards, and the wedge-clamping slider pair, consisting of the fixed wedge and the clamping slider, releases from the pile head. The pile hammer can then detach from the pile, and the pile can be hoisted to another pile for repeated pile driving operations.

[0007] In a preferred embodiment of this invention, 2-4 fixing wedges are installed on the inner wall of the pile clamping device. A T-groove is provided on the sliding surface of each fixing wedge, and a T-shaped guide block is fixedly installed on the pile clamping slider. The T-shaped guide block is slidably engaged in the T-groove of the fixing wedge. A clamping insert is embedded on the pile clamping surface of the pile clamping slider. The structure is simple and reasonable, easy to install and maintain, and beneficial for protecting the pile body.

[0008] In a preferred embodiment of this invention, the slider driving device includes a hydraulic cylinder and a clamping spring. The cylinder body of the hydraulic cylinder is hinged to the cylinder body of the pile clamping device, and the piston rod end of the hydraulic cylinder is hinged to the pile clamping slider. The clamping spring, fitted onto the cylinder body of the hydraulic cylinder, presses against the piston rod end of the hydraulic cylinder. The clamping spring is a cylindrical helical compression spring, pressed between the cylinder body of the hydraulic cylinder and the piston rod end. In this structure, the clamping force of the compression spring is used to achieve a stable clamping of the pile, which is beneficial to the stability of the clamping force. The hydraulic cylinder only operates when the pile is released.

[0009] In another preferred embodiment of this invention, the slider driving device is a cylinder or an electric push rod. This allows for adaptation to various power sources for slider driving.

[0010] In a preferred embodiment of this invention, the inclination angle α between the sliding contact surface of the fixed wedge and the pile clamping slider and the center line of the pile clamping device cylinder is 3°–8°. This provides a stable self-locking function.

[0011] In a preferred embodiment of this invention, a top plate and a bottom plate are fixedly installed at the upper and lower ends of the pile clamping device cylinder, respectively. A central through hole is provided at the center of both the top and bottom plates. A replacement block is movably installed at the central through hole of the top plate, and a guide cylinder is fixedly installed at the central through hole of the bottom plate. This facilitates the smooth entry of the pile into the clamping cylinder, while the replacement block protects the pile head. Attached Figure Description

[0012] The present invention, a pile driver clamping and stabilizing device, will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is an installation structure diagram of this utility model;

[0014] Figure 2 yes Figure 1 A sectional view;

[0015] Figure 3 This is a structural diagram of a specific embodiment of the utility model pile driver clamping and stabilizing device;

[0016] Figure 4 yes Figure 3 Structural diagram of section A-A;

[0017] Figure 5 yes Figure 3 Assembly drawing of the fixed wedge block and the clamping block slider;

[0018] Figure 6 yes Figure 5 B-B cross-section view.

[0019] In the diagram, 1—bottom plate of the cylinder, 2—fixed wedge, 3—cylinder body of the pile clamp, 4—pile clamping slider, 5—T-shaped guide block, 6—slider hinge support, 7—hydraulic cylinder, 8—compression spring, 9—hydraulic cylinder hinge support, 10—top plate of the cylinder, 11—guide cylinder, 12—clamping insert, 13—cylinder mounting lug, 14—pile clamping device mounting beam, 15—guide rod, 16—replacement block, 17—lower crossbeam of the pile hammer, 18—hammer core, 19—pile hammer hydraulic cylinder, 20—pile hammer hydraulic cylinder.

[0020] —Pile hammer on the crossbeam. Detailed Implementation

[0021] like Figure 1 , Figure 2As shown, the pile driving hammer is a guide rod type hydraulic pile driving hammer, which includes a lower crossbeam 17, an upper crossbeam 20, and guide rods 15. The upper crossbeam 20 is fixedly installed on the upper ends of two parallel guide rods 15, while the lower crossbeam 17 is fixedly installed in the middle of the two guide rods 15. The two guide rods 15 extend downwards, and a pile clamping device mounting beam 14 is fixed at the lower end of the two guide rods 15. A pile hammer hydraulic cylinder 19 is also fixedly installed below the upper crossbeam 20. The hammer core 18, connected to the piston rod end of the pile hammer hydraulic cylinder 19, is located between the upper crossbeam 20 and the lower crossbeam 17 of the pile hammer. The pile clamping device cylinder 3 is fixedly installed on the guide rod between the lower beam 17 of the pile hammer and the pile clamping device mounting beam 14 through the cylinder mounting lug 13 (the seat part of the mounting lug is shown in the figure). A replacement block 16 is movably arranged above the pile clamping device cylinder 3. During pile driving, the replacement block 16 is positioned at the top of the pile body, and the hammer core 18 strikes the pile head through the replacement block 16 to achieve pile driving.

[0022] like Figure 3 , Figure 4 The pile driver clamping and stabilizing device shown includes a clamping cylinder 3. A top plate 10 is fixedly installed at the upper end of the clamping cylinder 3, and a central through hole is provided at the center of the top plate 10. The replacement block 6 is movably placed in the central hole of the top plate. A bottom plate 1 is fixedly installed at the lower end of the clamping cylinder 3, and a central through hole is also provided at the center of the bottom plate 1. A trumpet-shaped guide cylinder 11 is welded to the lower side of the bottom plate 1, and the tube of the guide cylinder 11 corresponds to the central hole of the bottom plate 1.

[0023] Three fixing wedges 2 are evenly distributed along the circumference of the inner wall of the pile clamping device cylinder 3 in the lower half of the inner wall. All three fixing wedges 2 are fixedly installed on the inner wall of the pile clamping device cylinder 3. The surface of the fixing wedges 2 facing the center of the cylinder is inclined, and a T-slot is provided on this inclined surface. A pile clamping slider 4 is slidably mounted on the inclined surface of the fixing wedges 2. The inclined surface of the pile clamping slider 4 slides in contact with the inclined surface of the fixing wedges 2 to form a sliding contact inclined surface. The inclination angle α between this sliding contact surface and the centerline of the pile clamping device cylinder 3 is 4.5°, preferably α = 3°–8°. Two T-shaped guide blocks 5 are fixedly installed on the inclined surface of the pile clamping slider 4 by bolts. The two T-shaped guide blocks 5 are slidably clamped in the T-shaped groove of the fixed wedge block 2. Several clamping inserts 12 are embedded on the pile clamping surface of the pile clamping slider 4 facing the core of the cylinder. The clamping inserts 12 are made of high polymer materials such as rubber, nylon, and high-strength plastic. The clamping inserts 12 can protect the pile body from being pinched and can also improve the friction between the clamping inserts 12 and the pile body.

[0024] Above each pile clamping slider 4, a hydraulic cylinder 7 and a compression spring 8 are provided. The upper end of the hydraulic cylinder 7 is hinged to the pile clamping device cylinder 3 and the top plate 10 of the cylinder through a hydraulic cylinder hinge support 9. A slider hinge support 6 is fixedly installed at the piston rod end of the hydraulic cylinder 7. The slider hinge support 6 is also hinged to the pile clamping slider 4. A compression spring 8 is installed between the hydraulic cylinder hinge support 9 and the slider hinge support 6. The compression spring 8 is a helical compression spring.

[0025] When the hydraulic cylinder 7 is working, the hydraulic cylinder 7 lifts the pile clamping slider 4 upward, causing the pile clamping slider 4 to leave the surface of the pile body, and the pile clamping hammer stabilizer separates from the pile body, so that the pile clamping hammer stabilizer is lifted off the pile body or put on the head of the pile body.

[0026] When hydraulic cylinder 7 is not in operation, under the action of clamping spring 8, the piston rod of hydraulic cylinder 7 extends outward and drives the clamping sliding contact surface to slide downward, causing the clamping slider 4 to press against the pile head of the pile body. The pile clamping and stabilizing hammer device and the pile body are in a stable clamping and stabilizing hammer state. In this way, the pile hammer installed on the pile clamping and stabilizing hammer device is stably supported on the top of the pile body, and starting the pile hammer can complete the hammering and driving of the pile body.

[0027] The aforementioned pile hammer can be a hydraulic pile hammer, a diesel pile hammer, or a vibratory hammer. A hydraulic cylinder, pneumatic cylinder, or electric push rod is directly hinged between the pile clamping slider 4 and the pile clamping cylinder 3. These driving devices drive the pile clamping slider 4 to slide up and down along the inclined plane, thereby clamping or separating the pile.

[0028] The above are some preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make improvements and substitutions to the technical solutions described in the foregoing embodiments. Such substitutions and improvements that do not violate the spirit and principles of the present invention all fall within the protection scope of the present invention.

Claims

1. A pile driver clamping and stabilizing device, comprising a clamping device cylinder (3), characterized in that: At least two fixed wedges (2) are installed on the inner wall of the pile clamping device cylinder (3). A pile clamping slider (4) is slidably supported on each fixed wedge (2). The sliding contact surfaces of the fixed wedges (2) and the pile clamping slider (4) are inclined. A slider driving device is hinged on the pile clamping slider (4).

2. The pile driver clamping and stabilizing device according to claim 1, characterized in that: Two to four fixing wedges (2) are installed on the inner wall of the pile clamping device cylinder (3).

3. The pile driver clamping and stabilizing device according to claim 2, characterized in that: The sliding surface of the fixed wedge (2) is provided with a T-shaped groove, and a T-shaped guide block (5) is fixedly installed on the pile clamping slider (4). The T-shaped guide block (5) is slidably clamped in the T-shaped groove of the fixed wedge (2).

4. The pile driver clamping and stabilizing device according to claim 1, characterized in that: The clamping block (4) is fitted with a clamping insert (12) on its clamping surface.

5. The pile driver clamping and stabilizing device according to any one of claims 1-4, characterized in that: The slider driving device includes a hydraulic cylinder (7) and a clamping spring (8). The cylinder body of the hydraulic cylinder (7) is hinged on the cylinder body (3) of the pile clamping device. The piston rod end of the hydraulic cylinder (7) is hinged to the pile clamping slider (4). The clamping spring (8) fitted on the cylinder body of the hydraulic cylinder (7) presses against the piston rod end of the hydraulic cylinder (7).

6. The pile driver clamping and stabilizing device according to claim 5, characterized in that: The compression spring (8) is a cylindrical helical compression spring, which is press-fitted between the cylinder body and the piston rod end of the hydraulic cylinder (7).

7. The pile driver clamping and stabilizing device according to any one of claims 1-4, characterized in that: The slider driving device is a cylinder or an electric push rod.

8. The pile driver clamping and stabilizing device according to claim 1, characterized in that: The inclination angle α between the sliding contact surface of the fixed wedge (2) and the pile clamping slider (4) and the center line of the pile clamping device cylinder (3) is 3°-8°.

9. The pile driver clamping and stabilizing device according to claim 1, characterized in that: The top plate (10) and bottom plate (1) of the pile clamping device cylinder (3) are fixedly installed at the upper and lower ends respectively. The top plate (10) and bottom plate (1) of the cylinder are provided with a central through hole at the center position.

10. The pile driver clamping and stabilizing device according to claim 9, characterized in that: A replacement block (16) is movably installed at the center through hole of the top plate (10) of the cylinder, and a guide cylinder (11) is fixedly installed at the center through hole of the bottom plate (1) of the cylinder.

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