Hammer head of percussion drill

Abstract

The utility model relates to a percussion drill hammerhead which comprises a hammer cap and a hammer core, the hammer cap is fixed on the upper plane of the hammer core, the diameters of circumferential walls between the hammer cap and the hammer core are equal, a lifting hole is formed in the hammer cap, and a lifting assembly used for lifting the percussion drill hammerhead is installed in the lifting hole. Octagonal prism wedge-shaped teeth and octagonal prism wedge-shaped side tooth blocks are fixed to the bottom plane of the hammer core in a partial penetration welding mode, the multiple octagonal prism wedge-shaped side tooth blocks are arranged in pairs and distributed on the circumferential wall of the hammer core at equal intervals, and the multiple octagonal prism wedge-shaped teeth are arranged in the center of the hammer core; according to the utility model, the wear resistance and durability of the impact teeth and the hammer head are improved, the frequency of maintaining and replacing the impact teeth and the hammer head is reduced, the work efficiency of impact hole forming is improved, consumables and other costs are reduced, and the economical efficiency is improved; and the maintenance and replacement frequency is reduced, and smoke and light pollution generated by welding are also reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to engineering pile foundation construction technical field especially relates to a percussion drill hammer head. BACKGROUND

[0002] For hard conglomerate, granite and boulder geological conditions, large diameter rock-socketed cast-in-place pile construction, commonly used simple mechanical, low cost, high efficiency, wide application range of percussion hole filling pile construction technology, the technology adopts percussion drill hammer head to hammer hard rock to form a pile hole, commonly used high strength alloy steel percussion drill hammer head has cross shape (for general large diameter pile 0.6-2m) or star type hammer (for 2-3m super large diameter pile), the larger the pile diameter, the larger the hammer head size, the greater the weight. Due to the noise vibration generated during the impact process, due to environmental protection requirements, low stroke high frequency impact hole forming is now used. The bottom of the hammer head is commonly used high manganese high chromium alloy impact tooth, the hammer tooth adopts conical tooth, triangular prism tooth and wedge tooth, when impacting hard rock, the rock penetration depth and rock breaking effect of the three kinds of teeth decrease in turn, and the wear degree of the three kinds of teeth also decreases in turn, the first two teeth wear the most, the wedge tooth is relatively durable, and triangular prism tooth and wedge tooth are commonly used in construction to balance between durability, economy and efficiency, and the welding of impact tooth and hammer bottom is commonly used J506 electrode. When impacting rock to form a hole, the impact tooth and the hammer head are severely worn, and the frequent replacement and repair of the impact tooth reduce the construction efficiency and increase the economic cost. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at overcoming the defects of prior art, and provides a percussion drill hammer head with reduced frequency of maintenance and replacement of impact tooth and hammer head and improved impact hole forming efficiency.

[0004] The utility model discloses a percussion drill hammer head that overcomes the defects of the prior art and reduces the frequency of maintenance and replacement of impact tooth and hammer head and improves the impact hole forming efficiency.

[0005] The utility model discloses an advantageous effect is: compared with prior art, the traditional wedge is improved to octagonal prism wedge, and octagonal prism increases the impact edge number, impact rock breaking effect and impact resistance, wear resistance effect;The welding of tooth and hammer head bottom becomes the combination weld of partial penetration from the fillet weld of wedge tooth, and the welding quality is more reliable, and the impact resistance and wear resistance can be suitable for hard conglomerate, granite and various rocks and boulder geology condition, impact hole forming large diameter rock -socketed pile foundation construction;Rock breaking effect of impact hard rock is improved;The wear resistance and durability of impact tooth and hammer head are improved, the frequency of maintenance and replacement of impact tooth and hammer head is reduced, the impact hole forming work efficiency is improved, the consumption and other cost are reduced, and the economy is improved;The frequency of maintenance and replacement is reduced, and the smoke and light pollution generated by welding are also reduced.

[0006] As preferred, the circumferential wall of the hammer core is provided with four hammer grooves with arc-shaped cross sections arranged along the axial direction of the hammer core, the four hammer grooves are distributed in a cross shape along the axial core of the hammer core, and the circumferential wall between adjacent hammer grooves is formed into a hammer lobe, and the four hammer lobes are distributed in a cross shape along the axial core of the hammer core; through the arrangement of the above structure, a small amount of soil return is smoother during the impact drill hammer head construction, so that the impact hole forming effect is better.

[0007] As preferred, the octagonal prism wedge-shaped edge tooth block is arranged on the bottom plane and the circumferential wall of the hammer lobe of the hammer core, the octagonal prism wedge-shaped edge tooth block comprises an octagonal prism wedge-shaped edge tooth and a side blade tooth, the octagonal prism wedge-shaped edge tooth is fixed on the bottom plane of the hammer lobe of the hammer core, and the side blade tooth is fixed on the side edge of the octagonal prism wedge-shaped edge tooth and extends to the circumferential wall of the hammer lobe of the hammer core and is fixed; through the arrangement of the above structure, the combination of the octagonal prism wedge-shaped edge tooth and the side blade tooth together increases the impact and cutting pile hole wall rock effect, and reduces the wear and protection of the hammer lobe during impact.

[0008] As preferred, one side of the octagonal prism wedge-shaped edge tooth is provided with a tooth, the bottom surface of the tooth is flush with the bottom surface of the side blade tooth, one side surface of the tooth is fixed with the side blade tooth, and the other side surface of the tooth is an inclined surface close to the side blade tooth; the tooth is arranged, the impact working surface is increased during impact work, and the wear and protection of the hammer lobe during impact are further reduced.

[0009] As preferred, both ends of the octagonal prism wedge-shaped edge tooth are provided with inwardly inclined cutting edges, and the cutting edges are located on the side of the bottom plane of the hammer core; through the arrangement of the cutting edges, not only the partial penetration between the octagonal prism wedge-shaped edge tooth and the bottom plane of the hammer core is facilitated, but also the octagonal prism wedge-shaped edge tooth is facilitated to be dissected by external tools and replaced when the octagonal prism wedge-shaped edge tooth is worn to a certain degree.

[0010] Preferably, the hammer blade is provided with a lifting lug on its circumferential wall, and a ring-shaped safety wire rope is inserted and fixed on the lifting lug; when the working wire rope breaks and the hammer falls off, the hammer head can be easily retrieved by the above structure.

[0011] Preferably, at least two threaded steel bars are provided on the circumferential wall of the hammer blade, and the threaded steel bars are distributed in a spiral shape along the circumference of the hammer core; during the impact drilling rotation process, the hammer head can increase the cutting of rock chips from the borehole wall and protect the hammer blade from wear.

[0012] Preferably, the octagonal wedge teeth are arranged in a cross pattern at the center of the hammer core, and both ends of the octagonal wedge teeth are provided with inwardly inclined cut edges, which are located on the bottom plane side of the hammer core. By providing cut edges, it is not only convenient to partially weld the octagonal wedge teeth to the bottom plane of the hammer core, but also convenient to dissect and replace the octagonal wedge teeth with external tools when they are worn to a certain extent.

[0013] Preferably, the hoisting assembly includes a working wire rope and a wire rope sleeve. The working wire rope passes through an insertion hole provided in the center of the hammer cap, and one end of the working wire rope is fixed to the wire rope sleeve. The other end of the working wire rope is connected to an external impact hoisting device. When the impact drill hammer is working, the wire rope sleeve abuts against the wall of the hoisting hole on the hammer cap. The above structure facilitates the assembly and disassembly of the working wire rope. Attached Figure Description

[0014] Fig. 1 This is a three-dimensional structural diagram of the impact drill hammer head of this utility model.

[0015] Fig. 2 This is a three-dimensional structural diagram of the impact drill hammer head of this utility model.

[0016] Fig. 3 This is a schematic diagram of the three-dimensional structure of the octagonal prism wedge-shaped teeth of this utility model.

[0017] Fig. 4 This is a schematic diagram of the three-dimensional structure of the octagonal prism wedge-shaped edge tooth block of this utility model.

[0018] The labels in the attached diagram are as follows: 1. Hammer cap; 2. Hammer core; 3. Lifting assembly; 4. Octagonal wedge-shaped tooth; 5. Octagonal wedge-shaped edge tooth block; 6. Threaded steel bar; 7. Cut edge; 11. Lifting hole; 21. Hammer groove; 22. Hammer disc; 23. Lifting lug; 31. Working wire rope; 32. Wire rope sleeve; 51. Octagonal wedge-shaped edge tooth; 52. Side cutting tooth; 53. Tooth; 54. Inclined surface. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings: as shown in the drawings Figs. 1 to 4 As shown, this utility model includes a hammer cap 1 and a hammer core 2. The hammer core 2 is a frustum structure with a bottom plane area larger than the top plane area and an arc-shaped circumferential wall. The hammer cap 1 is fixed on the top plane of the hammer core 2, and the diameters of the circumferential walls between the two are equal. The hammer cap 1 is provided with a lifting hole 11, and a lifting assembly 3 for lifting the impact drill hammer head is installed in the lifting hole 11. On the bottom plane of the hammer core 2, octagonal wedge teeth 4 and octagonal wedge edge teeth blocks 5 are fixed by partial welding. Several octagonal wedge edge teeth blocks 5 are provided and arranged in pairs, and are distributed at equal intervals on the circumferential wall of the hammer core 2. Several octagonal wedge teeth 4 are provided and are located at the center of the hammer core 2.

[0020] The circumferential wall of the hammer core 2 is provided with four arc-shaped hammer grooves 21 arranged along the axial direction of the hammer core 2. The four hammer grooves 21 are arranged in a cross shape along the axis of the hammer core 2, and the circumferential wall between adjacent hammer grooves 21 forms hammer petals 22. The four hammer petals 22 are arranged in a cross shape along the axis of the hammer core 2.

[0021] An octagonal wedge-shaped edge tooth block 5 is disposed on the bottom plane and circumferential wall of the hammer petal 22 of the hammer core 2. The octagonal wedge-shaped edge tooth block 5 includes an octagonal wedge-shaped edge tooth 51 and a side cutting tooth 52. The octagonal wedge-shaped edge tooth 51 is fixed on the bottom plane of the hammer petal 22 of the hammer core 2, and the side cutting tooth 52 is fixed on the side of the octagonal wedge-shaped edge tooth 51 and extends to the circumferential wall of the hammer petal 22 of the hammer core 2 and is fixed thereon.

[0022] One side of the octagonal wedge-shaped edge tooth 51 is provided with a tooth 53. The bottom surface of the tooth 53 is flush with the bottom surface of the side cutting tooth 52. One side of the tooth 53 is fixed to the side cutting tooth 52, and the other side of the tooth 53 is an inclined surface 54 that approaches the side cutting tooth 52.

[0023] The two ends of the octagonal wedge-shaped edge teeth 51 are provided with inwardly inclined cutting edges 7, and the cutting edges 7 are located on the bottom plane side of the hammer core 2.

[0024] The hammer 22 is provided with a lifting lug 23 on its circumferential wall, and a ring-shaped safety steel wire rope is inserted and fixed on the lifting lug 23.

[0025] At least two threaded steel bars 6 are provided on the circumferential wall of the hammer 22, and the threaded steel bars 6 are distributed in a spiral shape along the circumference of the hammer core 2.

[0026] Octagonal wedge-shaped teeth 4 are arranged in a cross pattern at the center of the hammer core 2, and the two ends of the octagonal wedge-shaped teeth 4 are provided with inwardly inclined cutting edges 7, and the cutting edges 7 are located on the bottom plane side of the hammer core 2.

[0027] The hoisting assembly 3 includes a working wire rope 31 and a wire rope sleeve 32. The working wire rope 31 passes through the insertion hole provided in the center of the hammer cap 1, and one end of the working wire rope 31 is fixed to the wire rope sleeve 32. The other end of the working wire rope 31 is connected to the external impact hoisting equipment. When the impact drill hammer is working, the wire rope sleeve 32 abuts against the wall of the hoisting hole on the hammer cap 1.

[0028] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An impact drill hammer head, comprising a hammer cap (1) and a hammer core (2), characterized in that: The hammer core (2) is a frustum structure with a bottom plane area larger than the top plane area and an arc-shaped circumferential wall. The hammer cap (1) is fixed on the top plane of the hammer core (2) and the diameters of the circumferential walls between the two are equal. The hammer cap (1) is provided with a lifting hole (11). A lifting assembly (3) for lifting the impact drill hammer head is installed in the lifting hole (11). On the bottom plane of the hammer core (2), an octagonal wedge tooth (4) and an octagonal wedge edge tooth block (5) are fixed by partial welding. The octagonal wedge edge tooth block (5) is provided in several pieces and is arranged in pairs and is distributed at equal intervals on the circumferential wall of the hammer core (2). The octagonal wedge tooth (4) is provided in several pieces and is located at the center of the hammer core (2).

2. The impact drill hammer head according to claim 1, characterized in that: The circumferential wall of the hammer core (2) is provided with four arc-shaped hammer grooves (21) arranged along the axial direction of the hammer core (2). The four hammer grooves (21) are arranged in a cross shape along the axis of the hammer core (2), and the circumferential wall of the hammer core between adjacent hammer grooves (21) forms hammer petals (22). The four hammer petals (22) are arranged in a cross shape along the axis of the hammer core (2).

3. The impact drill hammer head according to claim 2, characterized in that: The octagonal wedge-shaped edge tooth block (5) is disposed on the bottom plane and circumferential wall of the hammer petal (22) of the hammer core (2). The octagonal wedge-shaped edge tooth block (5) includes octagonal wedge-shaped edge teeth (51) and side cutting teeth (52). The octagonal wedge-shaped edge teeth (51) are fixed on the bottom plane of the hammer petal (22) of the hammer core (2). The side cutting teeth (52) are fixed on the side of the octagonal wedge-shaped edge teeth (51) and extend to the circumferential wall of the hammer petal (22) of the hammer core (2) and are fixed thereon.

4. The impact drill hammer head according to claim 3, characterized in that: One side of the octagonal wedge-shaped edge tooth (51) is provided with a tooth (53), the bottom surface of the tooth (53) is flush with the bottom surface of the side cutting tooth (52), one side of the tooth (53) is fixed to the side cutting tooth (52), and the other side of the tooth (53) is an inclined surface (54) that approaches the side cutting tooth (52).

5. The impact drill hammer head according to claim 3, characterized in that: The two ends of the octagonal wedge-shaped edge teeth (51) are provided with inwardly inclined cutting edges (7), and the cutting edges (7) are located on the bottom plane side of the hammer core (2).

6. The impact drill hammer head according to claim 3, characterized in that: The hammer (22) is provided with a lifting lug (23) on its circumferential wall, and a ring-shaped safety wire rope is inserted and fixed on the lifting lug (23).

7. The impact drill hammer head according to claim 2, characterized in that: At least two threaded steel bars (6) are provided on the circumferential wall of the hammer (22), and the threaded steel bars (6) are spirally distributed along the circumference of the hammer core (2).

8. The impact drill hammer head according to claim 1, characterized in that: The octagonal wedge teeth (4) are arranged in a cross pattern on the center of the hammer core (2), and the two ends of the octagonal wedge teeth (4) are provided with inwardly inclined cut edges (7), and the cut edges (7) are located on the bottom plane side of the hammer core (2).

9. The impact drill hammer head according to claim 1, characterized in that: The hoisting assembly (3) includes a working wire rope (31) and a wire rope sleeve (32). The working wire rope (31) passes through the insertion hole provided in the center of the hammer cap (1), and one end of the working wire rope (31) is fixed to the wire rope sleeve (32). The other end of the working wire rope (31) is connected to an external impact hoisting device. When the impact drill hammer is working, the wire rope sleeve (32) abuts against the wall of the hoisting hole on the hammer cap (1).

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