A shock-absorbing spring damping protective sleeve for inner-rammed carrier pile construction

Abstract

The utility model discloses a shock absorbing spring damping protection sleeve for inner ramming carrier pile construction belongs to the inner ramming carrier pile construction technical field, solves the problem that current protection device cannot offset the radial force and axial force of protection sleeve simultaneously, it includes protection inner sleeve, protection outer sleeve and ball hinge rod subassembly. The utility model divides the protection sleeve in prior art into protection inner sleeve protection outer sleeve, and passes through ball hinge rod subassembly and connects protection inner sleeve protection outer sleeve, forms a floating type buffer system. After protection inner sleeve bears the multidirectional collision force of ramming, will impact transmission to ball hinge rod subassembly. Ball hinge rod subassembly utilizes the multidirectional freedom degree of its spherical articulation point, and can adaptively deflect and compress corresponding angle along with the impact direction, decomposes single radial or axial impact into multiple direction movement components, can offset the radial force and axial force of protection inner sleeve.

Description

Technical Field

[0001] This utility model relates to the field of internal compaction carrier pile construction technology, specifically to a shock-absorbing spring damping protective sleeve used in internal compaction carrier pile construction. Background Technology

[0002] In the construction of internally compacted piles, the violent collision between the compactor and the protective sleeve is a key challenge affecting the quality of pile formation. To reduce the lateral displacement of the sleeve caused by the collision, existing technologies often install tuned mass dampers (TMDs) around the protective sleeve. This approach absorbs and dissipates radial collision energy through the radial vibration of its internal spring-mass system (i.e., in the direction perpendicular to the sleeve axis), which plays a certain role in improving the radial displacement of the sleeve.

[0003] However, this technology has significant limitations. During actual compaction, the hammer does not always fall vertically; its friction against the inner wall of the casing generates significant axial friction. This axial force forms a 90° angle with the dominant direction of the internal spring of the tuned mass damper, making it difficult for the damper to respond effectively and dissipate energy. This not only prevents it from controlling the displacement caused by axial impact, but more seriously, the frequent axial forces directly act on the internal spring of the damper, easily causing lateral bending, fatigue damage, or even failure, thus introducing new equipment failure risks and increasing the complexity and cost of construction. Therefore, existing technology lacks a protective device that can simultaneously and effectively offset radial and axial impacts and is more adaptable to harsh actual construction conditions. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a shock-absorbing spring damping protective sleeve for internal compaction carrier pile construction, which solves the problem that existing protective devices cannot simultaneously counteract the radial and axial forces of the protective sleeve.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A shock-absorbing spring damping protective sleeve for internal compaction pile construction is provided, comprising: The protective inner sleeve is used to be fitted onto the ramming body; The protective outer sleeve is fitted over the outer protective inner sleeve. The top of the inner wall of the protective outer sleeve and the top of the outer wall of the protective inner sleeve are provided with multiple axial grooves arranged in a ring. Each axial groove is slidably provided with a hinge seat, and the two ends of the hinge seat are elastically connected to the two ends of the axial groove through elastic reset members. The ball joint assembly includes multiple first and second elastic ball joints arranged in a ring between the inner protective sleeve and the outer protective sleeve; each first elastic ball joint is in a pre-compressed state with one end hinged to the bottom of the inner wall of the outer protective sleeve, and the other end of each first elastic ball joint is inclined upward and hinged to the outer wall of the inner protective sleeve; each second elastic ball joint has its two ends hinged to two hinge seats located in the same radial direction.

[0006] The beneficial effects of this solution are as follows: The existing protective sleeve is divided into an inner protective sleeve and an outer protective sleeve, which are connected by a ball joint assembly to form a floating buffer system (elastic damping system). After the inner protective sleeve withstands the multi-directional impact force generated by the impact, it transmits the impact to the ball joint assembly. Utilizing the multi-directional degrees of freedom of its spherical hinge point, the ball joint assembly can adaptively deflect and compress at corresponding angles according to the impact direction, decomposing a single radial or axial impact into multiple directional motion components, thus offsetting the radial and axial forces on the inner protective sleeve. Simultaneously, the elastic properties of the first and second elastic ball joints provide multi-directional elastic restoring force, while the hinge seat efficiently dissipates impact energy, thereby collaboratively eliminating the displacement generated by the impact within the floating buffer system. The first elastic ball joint, specifically located at the bottom, also serves to support the inner protective sleeve, effectively maintaining its stable posture through the initial stiffness provided by the pre-compression state, ensuring the verticality of the pile.

[0007] Furthermore, the elastic reset element can be a limit spring, a pneumatic spring rod, a pneumatic damper, or a hydraulic damper. Different types of elastic reset elements can provide different damping characteristics. For example, limit springs are simple in structure and low in cost, while pneumatic or hydraulic dampers can provide more controllable buffering force, thereby optimizing the impact absorption effect and enhancing the adaptability and reliability of the device.

[0008] Furthermore, the first and second elastic ball joint rods have identical structures, both including an inner ball joint liner and an outer ball joint liner sleeved on the inner ball joint liner. The inner and outer ends of the outer and inner ball joint liners are fixedly connected by a connecting spring. By designing the ball joint rod as a combination of an inner ball joint liner, an outer ball joint liner, and a connecting spring, this structure allows the ball joint rod to undergo elastic deformation under multi-directional forces, effectively absorbing and dissipating impact energy. The ball joint connection method enhances the flexibility and adaptability of the rod, reduces stress concentration, extends service life, and simplifies the manufacturing and assembly process.

[0009] Furthermore, an expansion disc is fixed to the top of the protective outer sleeve. This expansion disc, fixed to the top of the protective outer sleeve, increases the support area, thereby preventing the sleeve from sinking or tilting during the compaction process and enhancing overall stability.

[0010] Furthermore, the outer diameter of the extended disc is 1.3 to 1.5 times the outer diameter of the protective outer sleeve. Setting the outer diameter of the extended disc to 1.3 to 1.5 times the outer diameter of the protective outer sleeve is an optimized range that ensures sufficient support to resist impact while avoiding construction inconvenience or material waste caused by an excessively large disc, thus achieving a balance between structural compactness and functionality.

[0011] Furthermore, the inner diameter of the protective outer sleeve is 1.2 to 1.5 times that of the inner protective inner sleeve. By setting the inner diameter of the outer sleeve to be 1.2 to 1.5 times that of the inner sleeve, sufficient clearance space is provided to ensure that the ball joint assembly and the hinge seat can move freely without interference, thereby ensuring the effective operation of the shock absorption mechanism while maintaining the rationality and stability of the overall structure.

[0012] Furthermore, the tilt angle of each first elastic ball joint is 30° to 45°. Setting the tilt angle to 30° to 45° optimizes the response efficiency of the members to radial and axial forces. Too small an angle may weaken the radial force absorption effect, while too large an angle may affect the axial force buffering. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the shock-absorbing spring damping protective sleeve; Figure 2 A wireframe diagram of a shock-absorbing spring damping protective sleeve; Figure 3 This is a schematic diagram of the elastic reset component. Figure 4 The wireframe diagram of the first elastic ball joint; Figure 5 The wireframe diagram of the second elastic ball joint; The components are: 1. Protective outer sleeve; 11. Extended disc; 2. Protective inner sleeve; 3. First elastic ball joint rod; 4. Second elastic ball joint rod; 41. Inner ball joint liner rod; 42. Outer ball joint liner rod; 5. Axial groove; 51. Elastic reset component. Detailed Implementation

[0014] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0015] refer to Figure 1 and Figure 2This embodiment provides a shock-absorbing spring damping protective sleeve for internal compaction carrier pile construction, including a protective outer sleeve 1, a protective inner sleeve 2, and a ball joint rod assembly.

[0016] The protective inner sleeve 2 is used to be fitted onto the ramming body.

[0017] The protective outer sleeve 1 is fitted onto the outside of the protective inner sleeve 2, and an expansion disc 11 is fixed to the top of the protective outer sleeve 1. Multiple axial grooves 5 arranged in a ring are provided on the top of the inner wall of the protective outer sleeve 1 and the top of the outer wall of the protective inner sleeve 2. A hinge seat is slidably disposed within each axial groove 5, and the two ends of the hinge seat are elastically connected to the two ends of the axial groove 5 via elastic reset members 51.

[0018] In this embodiment, reference Figure 3 The elastic reset element 51 can be a limit spring, a pneumatic spring rod, a pneumatic damper, or a hydraulic damper. A limit spring with a simple structure and low cost is preferred. Using two limit springs not only enables the hinge seat to have a centering reset function but also dissipates impact energy.

[0019] The ball joint assembly includes multiple first elastic ball joints 3 and second elastic ball joints 4, which are located between the inner protective sleeve 2 and the outer protective sleeve 1 and are distributed in a ring.

[0020] Each first elastic ball joint 3 is in a pre-compressed state and one end is hinged to the bottom of the inner wall of the protective outer sleeve 1. The other end of each first elastic ball joint 3 is inclined upward and hinged to the outer wall of the protective inner sleeve 2.

[0021] Each of the two ends of the second elastic ball joint 4 is hinged to two hinge seats located in the same radial direction.

[0022] For details, please refer to Figures 3-5 The first elastic ball joint rod 3 and the second elastic ball joint rod 4 have the same structure, both including an inner ball joint rod 41 and an outer ball joint rod 42 sleeved on the inner ball joint rod 41. The inner ends of the outer ball joint rod 42 and the inner ball joint rod 41 are fixedly connected by a connecting spring. By designing the ball joint rod as a combination of the inner ball joint rod 41, the outer ball joint rod 42, and the connecting spring, this structure allows the ball joint rod to undergo elastic deformation under multi-directional forces, effectively absorbing and dissipating impact energy. The ball joint connection method enhances the flexibility and adaptability of the rod, reduces stress concentration, extends service life, and simplifies the manufacturing and assembly process.

[0023] In this embodiment, the outer diameter of the extended disk 11 is 1.3 to 1.5 times the outer diameter of the protective outer sleeve 1. The inner diameter of the protective outer sleeve 1 is 1.2 to 1.5 times the inner diameter of the protective inner sleeve 2. The inclination angle of each first elastic ball joint 3 is 30° to 45°.

[0024] In summary, the beneficial effects of this solution are as follows: This solution divides the existing protective sleeve into an inner protective sleeve 2 and an outer protective sleeve 1, and connects the inner protective sleeve 2 and the outer protective sleeve 1 through a ball joint assembly to form a floating buffer system (elastic damping system). After the inner protective sleeve 2 withstands the multi-directional impact force generated by the impact, it transmits the impact to the ball joint assembly. The ball joint assembly utilizes the multi-directional degrees of freedom of its spherical hinge point to adaptively generate corresponding angles of deflection and compression according to the impact direction, decomposing a single radial or axial impact into multiple directional motion components. At the same time, the elastic properties of the first elastic ball joint 3 and the second elastic ball joint 4 provide multi-directional elastic restoring force, while the hinge seat efficiently dissipates the impact energy, thereby synergistically eliminating the displacement generated by the impact within the floating buffer system. The first elastic ball joint 3, specially set at the bottom, also serves to support the inner protective sleeve 2, providing pre-support force through a pre-compression state to form a stable "elastic base," dynamically maintaining the verticality and stability of the inner protective sleeve during the impact process, fundamentally suppressing the accumulation of displacement.

[0025] Although specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this solution. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this solution.

Claims

1. A shock-absorbing spring damping protective sleeve for internal compaction pile construction, characterized in that, include: The protective inner sleeve (2) is used to be fitted onto the ramming body; The protective outer sleeve (1) is fitted on the outside of the protective inner sleeve (2). The top of the inner wall of the protective outer sleeve (1) and the top of the outer wall of the protective inner sleeve (2) are provided with a plurality of axial grooves (5) arranged in a ring. Each axial groove (5) is slidably provided with a hinge seat, and the two ends of the hinge seat are elastically connected to the two ends of the axial groove (5) through an elastic reset member (51). The ball joint assembly includes multiple first elastic ball joints (3) and second elastic ball joints (4) located between the inner protective sleeve (2) and the outer protective sleeve (1) and arranged in a ring. Each first elastic ball joint (3) is in a pre-compressed state and one end is hinged to the bottom of the inner wall of the outer protective sleeve (1). The other end of each first elastic ball joint (3) is inclined upward and hinged to the outer wall of the inner protective sleeve (2). Both ends of each second elastic ball joint (4) are respectively hinged to two hinge seats located in the same radial direction.

2. The shock-absorbing spring damping protective sleeve for internal compaction carrier pile construction according to claim 1, characterized in that, The elastic reset component (51) is a limit spring, a pneumatic spring rod, a pneumatic buffer, or a hydraulic buffer.

3. The shock-absorbing spring damping protective sleeve for internal compaction carrier pile construction according to claim 1, characterized in that, The first elastic ball joint rod (3) and the second elastic ball joint rod (4) have the same structure, both including a ball joint inner liner rod (41) and a ball joint outer liner rod (42) sleeved on the ball joint inner liner rod (41). The two ends of the ball joint outer liner rod (42) and the ball joint inner liner rod (41) are fixedly connected by a connecting spring.

4. The shock-absorbing spring damping protective sleeve for internal compaction carrier pile construction according to claim 1, characterized in that, An extended disc (11) is fixed to the top of the protective outer sleeve (1).

5. The shock-absorbing spring damping protective sleeve for internal compaction carrier pile construction according to claim 4, characterized in that, The outer diameter of the extended disk (11) is 1.3 to 1.5 times the outer diameter of the protective outer sleeve (1).

6. The shock-absorbing spring damping protective sleeve for internal compaction carrier pile construction according to claim 1, characterized in that, The inner diameter of the outer protective sleeve (1) is 1.2 to 1.5 times the inner diameter of the inner protective sleeve (2).

7. The shock-absorbing spring damping protective sleeve for internal compaction carrier pile construction according to claim 1, characterized in that, The tilt angle of each of the first elastic ball joints (3) is 30°~45°.

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