Percussion drill bit for sand layer drilling
By thickening the hammer body, hammer claws and hammer ears on the impact drill bit and setting a variety of hammer teeth angles, the problem of slow drilling speed in the sand layer by traditional punching pile machines is solved, and faster drilling and higher pile quality is achieved.
Patent Information
- Application Number
- CN202422432753.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-09
AI Technical Summary
When drilling into silt and sand layers, traditional punching pile machines have slow drilling speed and difficult pile formation, which affects the quality of pile formation and construction progress.
A sand-layer drilling impact drill bit is designed, using thickened hammer body, hammer claw and hammer ears, and an outer ring, middle ring and inner ring hammer teeth are installed on the lower end surface and connection of the hammer claw to increase the angle and torque of the hammer teeth and improve drilling efficiency.
It effectively improves the drilling speed, reduces the drilling cycle time, ensures the construction progress requirements, and ensures the pile quality of punched cast piles.
Smart Images
Figure CN223227319U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an impact drill bit for drilling in sand layers. Background Art
[0002] Perforated cast-in-place piles are a commonly used type of construction piles. They are made by using an impact drill to raise a heavy drill bit with a drill blade (also known as a hammer), relying on the impact force of free fall to cut the rock layer, discharge the debris to form a hole, and then place a steel cage and pour concrete into it.
[0003] However, when drilling into silt and sand layers, traditional punch pile driver drill bits have problems such as slow drilling speed and difficulty in pile formation, which affects the pile quality and construction progress. Therefore, to address the above problems, an impact drill bit for drilling into sand layers is proposed. Utility Model Content
[0004] The utility model aims to overcome the existing defects and provide an impact drill bit for drilling in sand layers, thereby increasing the drilling speed and ensuring the construction progress requirements.
[0005] The technical solution for achieving the above object is: a percussion drill bit for drilling in sand layers, comprising a hammer body and a plurality of hammer claws, wherein the plurality of hammer claws are connected to the circumferential side wall of the hammer body at equal distances; the lower end surfaces of the hammer body and the plurality of hammer claws are connected to hammer teeth;
[0006] The hammer teeth include an outer ring hammer tooth, a middle ring hammer tooth and an inner ring hammer tooth; the lower end surface of each hammer claw and the connection between the hammer claw and the hammer body are connected with the outer ring hammer teeth; the edge of the lower end surface of the hammer body is connected with the middle ring hammer teeth, and the center of the lower end surface of the hammer body is connected with the inner ring hammer teeth.
[0007] Preferably, the angle between the ends of the outer ring hammer teeth and the inner ring hammer teeth and the horizontal plane is 45-55°; at least two outer ring hammer teeth are arranged under each hammer claw; at least one outer ring hammer tooth is arranged under the connection between each hammer claw and the hammer body; and at least one inner ring hammer tooth is arranged at the center below the hammer body.
[0008] Preferably, the middle circle hammer teeth are round-headed, arranged forward and spread obliquely toward the circumference; the angle between the end of the round head and the horizontal plane is 45-55°; at least five middle circle hammer teeth are arranged on the edge of the lower end face of the hammer body.
[0009] Preferably, a hammer ear is provided at the upper end of the side wall of the hammer body.
[0010] Preferably, the hammer body, the plurality of hammer claws and the hammer ears are all thickened.
[0011] Preferably, the number of the hammer claws may be five.
[0012] Preferably, the hammer body is in the shape of an inverted cone.
[0013] The beneficial effects of the present invention are as follows: the impact drill bit for drilling in sand layers is configured such that the outer ring of hammer teeth are connected to the lower end face of each hammer claw and at the connection between the hammer claw and the hammer body; the edge of the lower end face of the hammer body is connected to the middle ring of hammer teeth, and the center of the lower end face of the hammer body is connected to the inner ring of hammer teeth; and the hammer body, multiple hammer claws, and hammer ears are all thickened. The angle of the hammer teeth is also increased, and the axis of the increased hammer teeth intersects the axis of the drill bit at a larger angle, providing a greater total torque and improving drilling efficiency. This solves the problems of slow drilling speed and difficulty in pile formation in drilling in sand layers caused by bored pile drivers, effectively increases drilling speed, successfully reduces drilling cycle time, ensures construction schedule requirements, and guarantees the quality of bored pile formation. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a front view of the impact drill bit for drilling in sand layers according to the utility model;
[0015] Figure 2 The utility model is a bottom view of the impact drill bit for drilling in sand layers.
[0016] In the figure: 1. Hammer body; 2. Hammer claw; 3. Hammer ear; 4. Hammer tooth; 41. Outer circle hammer tooth; 42. Middle circle hammer tooth; 43. Inner circle hammer tooth. DETAILED DESCRIPTION
[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," "outside," and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as limiting the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0018] The present invention will be further described below with reference to the accompanying drawings.
[0019] like Figure 1-2 As shown, a percussion drill bit for drilling in sand layers comprises a hammer body 1 and multiple hammer claws 2, each of which is equidistantly connected to the circumferential sidewall of the hammer body 1. A hammer lug 3 is provided at the upper end of the sidewall of the hammer body 1. The hammer body 1 is inverted conical in shape. The hammer body 1, multiple hammer claws 2, and hammer lug 3 are all thickened. The hammer claws 2 are fixedly connected to the hammer body 1 and extend radially outward. The hammer body 1, hammer claws 2, and hammer lug 3 are all thickened. Increasing the drill bit weight increases the forward pressure, which directly increases the vertical pressure of the hammer teeth 4, effectively increasing the drilling kinetic energy of the hammer teeth 4.
[0020] Specifically, the lower end surfaces of the hammer body 1 and multiple hammer claws 2 are connected to hammer teeth 4; the number of hammer claws 2 can be five. The hammer teeth 4 include an outer ring of hammer teeth 41, a middle ring of hammer teeth 42, and an inner ring of hammer teeth 43. The outer ring of hammer teeth 41 is connected to the lower end surface of each hammer claw 2 and the connection between the hammer claw 2 and the hammer body 1. The middle ring of hammer teeth 42 is connected to the edge of the lower end surface of the hammer body 1, and the inner ring of hammer teeth 43 is connected to the center of the lower end surface of the hammer body 1.
[0021] Specifically, the angle between the ends of the outer ring hammer teeth 41 and the inner ring hammer teeth 43 and the horizontal plane is 45-55 degrees; at least two outer ring hammer teeth 41 are arranged under each hammer claw 2; at least one outer ring hammer tooth 41 is arranged under each hammer claw 2 and the hammer body 1; at least one inner ring hammer tooth 43 is arranged at the center below the hammer body 1.
[0022] Specifically, the middle circle hammer teeth 42 are round-headed, arranged forward and spread obliquely toward the periphery; the angle between the end of the round head and the horizontal plane is 45-55 degrees; at least five middle circle hammer teeth 42 are provided on the edge of the lower end face of the hammer body 1.
[0023] In the embodiment, the angle of the hammer bit 4 is increased, and the axis of the increased hammer bit 4 intersects with the axis of the drill bit at a larger angle, providing a larger total torque and improving drilling efficiency.
[0024] This impact drill bit for drilling in sandy layers features an outer ring of hammer teeth 41 connected to the lower end face of each hammer claw 2 and at the junction between the hammer claw 2 and the hammer body 1. The edge of the lower end face of the hammer body 1 is connected to a middle ring of hammer teeth 42, and the center of the lower end face of the hammer body 1 is connected to an inner ring of hammer teeth 43. Furthermore, the hammer body 1, multiple hammer claws 2, and hammer ears 3 are all thickened. The angle of the hammer teeth 4 is also increased, and the axis of the added hammer teeth 4 intersects the axis of the drill bit at a larger angle, providing greater total torque and improving drilling efficiency. This solves the problems of slow drilling speed and difficulty in pile formation that exist with punch pile drivers when drilling in sandy layers, effectively increasing drilling speed and successfully reducing drilling cycle time, ensuring construction schedule requirements, and guaranteeing the quality of punch pile formation.
[0025] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A percussion drill bit for drilling in sand layers, characterized in that: The hammer body (1) comprises a hammer body (1) and a plurality of hammer claws (2), wherein the plurality of hammer claws (2) are connected to the circumferential side wall of the hammer body (1) at equal distances; the lower end surfaces of the hammer body (1) and the plurality of hammer claws (2) are connected to hammer teeth (4); The hammer teeth (4) include an outer ring hammer teeth (41), a middle ring hammer teeth (42) and an inner ring hammer teeth (43); the lower end surface of each hammer claw (2) and the connection between the hammer claw (2) and the hammer body (1) are connected with the outer ring hammer teeth (41); the edge of the lower end surface of the hammer body (1) is connected with the middle ring hammer teeth (42), and the center of the lower end surface of the hammer body (1) is connected with the inner ring hammer teeth (43); The angle between the ends of the outer ring hammer teeth (41) and the inner ring hammer teeth (43) and the horizontal plane is 45-55 degrees; at least two outer ring hammer teeth (41) are provided below each hammer claw (2); at least one outer ring hammer tooth (41) is provided below the connection between each hammer claw (2) and the hammer body (1); at least one inner ring hammer tooth (43) is provided at the center below the hammer body (1); The middle circle hammer teeth (42) are round-headed, arranged forward and spread obliquely toward the circumference; the angle between the end of the round head and the horizontal plane is 45-55 degrees; at least five middle circle hammer teeth (42) are arranged on the edge of the lower end face of the hammer body (1).
2. The impact drill bit for sand layer drilling according to claim 1, characterized in that: A hammer ear (3) is provided at the upper end of the side wall of the hammer body (1).
3. The impact drill bit for sand layer drilling according to claim 2, characterized in that: The hammer body (1), the plurality of hammer claws (2) and the hammer ears (3) are all thickened.
4. The impact drill bit for sand layer drilling according to claim 1, characterized in that: The number of the hammer claws (2) can be five.
5. The impact drill bit for sand layer drilling according to claim 1, characterized in that: The hammer body (1) is in an inverted cone shape.