A pointed hammerhead

Abstract

This application relates to the field of hole reaming equipment, and more particularly to a pointed hammer head, which includes a guide portion with one end forming a conical tip, and a retraction portion. One end of the retraction portion is connected to the end face of the guide portion away from the tip. A recovery ramp is provided on the side wall of the retraction portion near the guide portion, and the recovery ramp is inclined towards a centerline parallel to its own length direction. This application has the effect of improving the efficiency of hole reaming construction.

Description

Technical Field

[0001] This application relates to the technical field of drilling and reaming equipment, and in particular to a pointed hammer head. Background Technology

[0002] The column hammer perforation and enlargement drilling technique is a foundation treatment technology. It primarily involves using a column hammer (referred to as a column hammer) to lift it to a certain height using a crane or other specialized equipment, then dropping it to impact and create a hole in the foundation soil. This impact is repeated until the designed depth is reached. Layered filling and compaction are then carried out within the hole to form piles, while the soil between the piles is simultaneously densified to create a composite foundation.

[0003] As the name suggests, column hammers are mostly cylindrical in shape, with a lifting ring at one end for connection to lifting equipment. The cylindrical hammerhead has a large end face area, which is not conducive to forming pile holes in the ground during tamping. Therefore, some column hammers have a metal tip on the hammerhead to guide the hammer into the ground, facilitating the enlargement of the pile hole.

[0004] Setting a tip at the end of the plunger improves the efficiency of hole reaming to some extent, but as the hole depth increases, the resistance encountered by the plunger also gradually increases, resulting in slower progress in the later stages of hole reaming. Summary of the Invention

[0005] To improve the efficiency of borehole reaming construction, this application provides a pointed hammer head.

[0006] The technical solution for a pointed hammerhead provided in this application is as follows:

[0007] A pointed hammer head includes a guide portion, one end of which forms a conical tip, and a retractable portion, one end of which is connected to the end face of the guide portion away from the tip. A retraction ramp is provided on the side wall of the retractable portion near the guide portion, and the retraction ramp is inclined towards a centerline parallel to its own length direction.

[0008] By adopting the above technical solution, the setting of the guide part and the recovery slope makes the hammer head form a structure with the cross-sections of the two ends gradually decreasing. During the process of the hammer head being inserted into the pile hole, it contacts the side wall of the pile hole. Compared with the cylindrical structure of the hammer head in related technologies, the contact area between the hammer head and the pile hole is smaller, thereby reducing the resistance during the process of the hammer head entering and exiting the pile hole and achieving the effect of improving construction efficiency.

[0009] Optionally, the guide portion sidewall is provided with ribs, which are disposed in close contact with the guide portion sidewall.

[0010] By adopting the above technical solution, during the process of inserting the hammer into the pile hole, the ribs can cut the side wall of the pile hole, so that the overall diameter of the pile hole is larger than the hammer, which further facilitates the hammer's entry and exit from the pile hole and improves construction efficiency.

[0011] Optionally, multiple ribs are evenly spaced along the axial direction of the guide portion.

[0012] By adopting the above technical solution, the setting of multiple ribs improves the cutting effect of the ribs on the sidewall of the pile hole.

[0013] Optionally, a counterweight may be detachably connected to the retractable portion.

[0014] By adopting the above technical solution, in the actual construction process, hammers of different qualities can be selected according to different geological needs, and the weight of the hammers can be adjusted by installing counterweights, thereby expanding the applicable range of the hammers.

[0015] Optionally, the counterweight has a cylindrical structure, and a receiving groove is coaxially formed on the end face of the retracted part away from the guide part, and the counterweight slides in the receiving groove.

[0016] By adopting the above technical solution, the sliding counterweight can be detached from the receiving groove, realizing a detachable connection between the counterweight and the retractable part.

[0017] Optionally, the receiving groove is provided with a sealing assembly, which includes a cover plate for sealing the receiving groove and a limiting rod slidably connected to the cover plate along the sliding direction perpendicular to the counterweight. The side wall of the receiving groove is provided with a limiting groove for the insertion of the limiting rod.

[0018] By adopting the above technical solution, the sliding limit rod is inserted into the limit groove, thereby sealing the receiving groove with the sealing cover and improving the stability of the counterweight after installation.

[0019] Optionally, multiple limiting rods are evenly spaced along the circumference of the sealing cover.

[0020] By adopting the above technical solution, multiple limit rods improve the stability of the sealing cover's positioning.

[0021] Optionally, the sealing cap is threadedly connected to a drive rod, the drive rod is provided with a drive ramp, and the side of the limiting rod away from the limiting groove abuts against the drive ramp. Rotating the drive rod can drive the limiting rod closer to the limiting groove.

[0022] By adopting the above technical solution, the drive rod is rotated, and the characteristics of the thread drive the drive rod to move, which in turn drives the limit rod to move, thereby realizing the adjustment of the position of the limit rod. At the same time, the self-locking property of the thread can be used to limit the limit rod, improving the stability of the limit rod in limiting the sealing cover. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the overall structure of the second embodiment of this application.

[0025] Figure 3 This is the second embodiment of the present application. Figure 2 Enlarged view of section A.

[0026] Figure 4 This is a schematic diagram of the sealing component according to the second embodiment of this application.

[0027] Reference numerals: 11. Guide section; 12. Retraction section; 13. Retraction ramp; 14. Receiving groove; 2. Rib; 3. Hanging lug; 4. Counterweight; 5. Sealing assembly; 51. Sealing cover; 52. Limiting rod; 53. Sliding groove; 54. Limiting groove; 55. Drive cavity; 56. Drive rod; 57. Drive ramp; 58. Adjustment surface. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0029] This application discloses a pointed hammerhead.

[0030] Example 1

[0031] Reference Figure 1 A pointed hammer head includes a guide section 11 and a retractable section 12. The guide section 11 is a rotating structure, with its diameter gradually decreasing along its length to form a pointed tip. One end of the retractable section 12 is welded to the larger end of the guide section 11. The retractable section 12 is also a rotating structure. A recovery ramp 13 is provided near the guide section 11, and the recovery ramp 13 slopes along the length of the retractable section 12 from the side near the guide section 11 to the side away from the guide section 11, towards its own centerline. A lifting lug is welded to the end face of the retractable section 12 away from the guide section 11 to facilitate the lifting equipment to drive the hammer head movement. During the hammer head's impact on the ground, the guide section 11 inserts into the ground, guiding the hammer head into the ground. During the hammer head's insertion into the ground, there is line contact between the hammer head and the sidewall of the pile hole. Compared to a columnar hammer head completely fitting against the sidewall of the pile hole, this reduces the contact area between the hammer head and the pile hole, thereby reducing the resistance encountered by the hammer head during insertion into the ground and during extraction from the pile hole, thus improving construction efficiency.

[0032] Reference Figure 1The guide section 11 has ribs 2 on its sidewall. The ribs 2 are strip-shaped and conform to the sidewall of the guide section 11, extending axially along the guide section 11. During the hammer's reaming process, the ribs 2 form grooves on the sidewall of the pile hole that communicate with the outside of the pile hole. This facilitates the expulsion of air from the pile hole when the hammer enters, and as the hammer reciprocates, the ribs 2, by tracing the sidewall of the pile hole, can damage the structure of the pile hole to a certain depth, allowing the diameter of the pile hole to be larger than the diameter of the hammer to a certain extent. This facilitates the hammer's entry and exit from the pile hole, further improving the reaming efficiency. Multiple ribs 2 can be evenly spaced around the axis of the guide section 11; in this embodiment, eight are used.

[0033] Reference Figure 1 The lug 3 has a U-shaped structure, with its opening facing the retractable part 12 and both ends welded to the end face of the retractable part 12. Multiple lugs 3 are arranged parallel to each other; in this embodiment, two are used to improve the stability of the lifting equipment when hooking the hammerhead. A reinforcing plate is placed between the two lugs 3, and the reinforcing plate is welded to both lugs 3 simultaneously, forming an integral structure and reducing the possibility of deformation of the lugs 3.

[0034] The implementation principle of a pointed hammer head in this application embodiment is as follows: during the hammer head's tamping process, the connecting piece abuts against the side wall of the pile hole, reducing the contact area between the hammer head and the pile hole, thereby reducing the resistance of the hammer head in the later stage of drilling and enlarging the pile hole and improving the drilling and enlarging efficiency.

[0035] Example 2

[0036] Reference Figure 2 and Figure 3 The difference between this embodiment and Embodiment 1 is that in this embodiment, a cylindrical counterweight 4 is detachably provided on the retractable part 12. A cylindrical receiving groove 14 is formed on the end face of the retractable part 12 away from the guide part 11. The counterweight 4 is installed in the receiving groove 14, and sliding the counterweight 4 allows it to detach from the receiving groove 14 through the opening. Multiple counterweights 4 can be provided, and the mass of the hammer can be adjusted by setting the number of counterweights 4, making it easier for the hammer to adapt to different construction environments.

[0037] Reference Figure 2 and Figure 4The receiving groove 14 is also equipped with a sealing assembly 5, which includes a sealing cover 51 and a limiting rod 52. The sealing cover 51 is slidably fitted in the receiving groove 14 and can also be detached from the receiving groove 14. The sealing cover 51 abuts against the counterweight 4. A sliding groove 53 is provided on the side wall of the sealing cover 51, and the limiting rod 52 is slidably connected to the sliding groove 53 along the radial direction of the sealing cover 51. A limiting groove 54 is provided on the side wall of the receiving groove 14. The sliding limiting rod 52 can be inserted into the limiting groove 54 to limit the sealing cover 51, thereby limiting the counterweight 4 through the sealing cover 51 and improving the stability of the counterweight 4 after installation. Multiple limiting grooves 54 are provided at intervals along the length of the receiving groove 14, and the interval between two adjacent limiting grooves 54 is equal to the length of the counterweight 4.

[0038] Reference Figure 2 and Figure 4 In order to improve the limiting effect of the limiting rod 52 on the sealing cover 51, multiple limiting rods 52 can be evenly spaced along the circumference of the sealing cover 51. In this embodiment, four limiting rods 52 are set.

[0039] Reference Figure 2 and Figure 4 The sealing cap 51 also has a drive cavity 55 inside, which is connected to multiple sliding grooves 53. A drive rod 56 is installed inside the drive cavity 55. The drive rod 56 is a cylindrical rod-shaped structure, coaxially arranged with the sealing cap 51, threadedly connected to the sealing cap 51, and extending one end to the outside of the sealing cap 51. A drive ramp 57 is provided on the drive rod 56, which is inclined along the length of the drive rod 56 towards its own axis. The end of the limiting rod 52 near the axis of the sealing cap 51 abuts against the drive ramp 57. Rotating the drive rod 56 causes it to displace in a direction parallel to the axis of the sealing cap 51, thereby driving the limiting rod 52 to move under the action of the drive ramp 57. This adjusts the position of the limiting rod 52 and improves the stability of the limiting rod 52 when inserted into the limiting groove 54.

[0040] Reference Figure 2 and Figure 4 An adjustment surface 58 is provided on the side of the limiting rod 52 away from the counterweight 4, and the adjustment surface 58 is located near the limiting groove 54. The adjustment surface 58 is inclined from the side near the limiting groove 54 to the side away from the limiting groove 54 along the sliding direction of the limiting rod 52. The adjustment surface 58 abuts against the edge of the limiting groove 54. When the limiting rod 52 is inserted into the limiting groove 54, it can drive the sealing cover 51 closer to the counterweight 4, thereby making the sealing cover 51 press against the counterweight 4 and improving the stability of limiting the counterweight 4.

[0041] The implementation principle of a pointed hammer head in this application embodiment is as follows: In actual construction, different weights of hammers are selected according to different geological needs. Making multiple hammers separately is costly. The overall weight of the hammer head can be adjusted by a detachable counterweight block 4, which facilitates the improvement of the hammer head's applicability.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pointed hammerhead, comprising a guide portion (11), one end of which is formed into a tapered tip, characterized in that, It also includes a retraction section (12), one end of which is connected to the end face of the guide section (11) away from the tip. A retraction slope (13) is provided on the side wall of the retraction section (12) near the guide section (11). The retraction slope (13) is inclined towards the center line parallel to its own length direction.

2. The pointed hammerhead according to claim 1, characterized in that, The guide portion (11) has a rib (2) on its side wall, and the rib (2) is fitted to the side wall of the guide portion (11).

3. A pointed hammerhead according to claim 2, characterized in that, The ribs (2) are evenly spaced along the axial direction of the guide (11).

4. A pointed hammerhead according to claim 1, characterized in that, A counterweight (4) is detachably connected to the retractable part (12).

5. A pointed hammerhead according to claim 4, characterized in that, The counterweight (4) has a cylindrical structure. The retractable part (12) has a coaxial receiving groove (14) on the end face away from the guide part (11). The counterweight (4) is slidably fitted in the receiving groove (14).

6. A pointed hammerhead according to claim 5, characterized in that, The receiving groove (14) is provided with a sealing assembly (5), which includes a cover plate for sealing the receiving groove (14) and a limiting rod (52) slidably connected to the cover plate in a direction perpendicular to the sliding direction of the counterweight (4). The side wall of the receiving groove (14) is provided with a limiting groove (54) for the insertion of the limiting rod (52).

7. A pointed hammerhead according to claim 6, characterized in that, Multiple limiting rods (52) are evenly spaced along the circumference of the sealing cover (51).

8. A pointed hammerhead according to claim 7, characterized in that, The sealing cap (51) is threaded with a drive rod (56), and the drive rod (56) is provided with a drive ramp (57). The side of the limiting rod (52) away from the limiting groove (54) abuts against the drive ramp (57). Rotating the drive rod (56) can drive the limiting rod (52) closer to the limiting groove (54).

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