Spiral rotary excavating drill bit

Abstract

The utility model provides a spiral rotary excavating drill bit, and belongs to the technical field of pile foundation construction equipment. Comprising a drill rod; a square head is welded to the top end of the drill rod. A heading head is arranged at the bottom of the drill rod. A spiral disc is welded to the peripheral face of the drill rod, a plurality of notches are formed in the peripheral face of the spiral disc at intervals, and a wear-resisting layer is welded in each notch. A plurality of cutting pick seats are obliquely welded at the lower part of the drill rod and at the bottom end of the spiral disc; and a plurality of cutting picks are mounted on each cutting pick seat. The utility model has the advantages of high operation efficiency, long service life and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of pile foundation construction equipment and relates to a spiral rotary drilling drill bit. Background Art

[0002] A rotary drilling rig is a construction machine suitable for drilling holes in foundation engineering. It is widely used in municipal construction, highway bridges, high-rise buildings, and other foundation construction projects. It boasts high installed power, high output torque, high axial pressure, maneuverability, and high construction efficiency. The rotary drilling rig outputs torque and pressure through the power unit, which are ultimately transmitted to the drill bit. Therefore, the drill bit is a crucial component in determining the rotary drilling rig's ability to adapt to complex strata and improve work efficiency.

[0003] A spiral drilling rig is generally used to drill holes in the soil layer. However, during the actual drilling operation, the soil layer may be mixed with relatively hard geological structures such as stones and shale, which may cause the spiral blades to wear or even be damaged. Therefore, the structure of the spiral drilling rig needs to be improved to make it more wear-resistant and extend its service life. Utility Model Content

[0004] The purpose of the utility model is to provide a spiral drilling drill bit to solve the above problems in the existing technology, so as to make the drilling operation more efficient.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a spiral drilling drill bit, characterized in that the drill bit includes a drill rod; a square head is welded on the top of the drill rod, and a tunneling head is provided at the bottom of the drill rod; a spiral disk is welded on the outer circumference of the drill rod, and a plurality of notches are provided at intervals on the outer circumference of the spiral disk, and a wear-resistant layer is welded in each notch; a plurality of tooth seats are welded obliquely to the bottom end of the spiral disk on the lower part of the drill rod, and a plurality of tooth seats are installed on each tooth seat.

[0006] Preferably, the lower part of the drill rod has a cavity opening downward, and the cavity is provided with a spring and a tunneling head in sequence from top to bottom; the tunneling head includes a tunneling head body and two baffles welded at intervals on the upper part of the tunneling head body, the outer diameters of the two baffles are consistent with the inner diameter of the cavity, and the lower end of the tunneling head is spike-shaped; the tunneling head body is formed by two steel plates welded in a "cross" shape; the lower end of the drill rod is detachably connected to an end plate, and the end plate is provided with a cross hole for the tunneling head body to pass through.

[0007] The utility model has the advantages:

[0008] 1. In this spiral drilling drill bit, a number of cutting teeth are installed at the bottom, a number of notches are opened on the outer circumference of the spiral disk, and a wear-resistant layer is welded in the notch, so that the rock can be cut and crushed during the rotary drilling process, thereby protecting the spiral disk from damage due to vertical resistance, extending its service life, and improving its operating efficiency.

[0009] 2. The spiral drilling drill bit is equipped with an elastic excavation head, which can provide a buffer for the drill bit when encountering hard geological conditions, further extending the service life of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a front view structural diagram of the drill bit.

[0011] Figure 2 It is a schematic diagram of the three-dimensional structure of the drill bit.

[0012] Figure 3 It is a schematic diagram of the cross-sectional structure of the drill bit.

[0013] In the figure, 1, drill rod; 2, square head; 3, spiral disk; 31, notch; 4, pick seat; 41, pick; 5, cavity; 6, spring; 71, boring head body; 72, baffle; 8, end plate; 81, cross hole. DETAILED DESCRIPTION

[0014] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0015] like Figure 1 、 Figure 2 and Figure 3 As shown, a spiral drilling drill bit includes a drill rod 1; a square head 2 is welded to the top of the drill rod 1, and a tunneling head is provided at the bottom of the drill rod 1; a spiral disk 3 is welded to the outer circumference of the drill rod 1, and a plurality of notches 31 are provided at intervals on the outer circumference of the spiral disk 3, and a wear-resistant layer is welded in each notch 31; a plurality of tooth seats 4 are welded obliquely to the bottom end of the spiral disk 3 at the lower part of the drill rod 1, and a plurality of teeth 41 are installed on each tooth seat 4.

[0016] In this spiral drilling drill bit, a number of cutting teeth 41 are installed at its bottom through the cutting tooth seat 4, so that it can "crush" hard objects such as rocks mixed in the soil, thereby effectively preventing the entire piece from contacting the spiral disk 3 and causing damage to the spiral. This can improve the efficiency of rotary drilling while extending the service life and maintenance cycle of the drill bit. Secondly, a number of notches 31 are opened on the outer circumference of the spiral disk 3, and a wear-resistant layer is welded inside the notches 31. The notches 31 cut and crush the rocks during the rotary drilling process, further protecting the spiral disk 3 from damage due to resistance from the vertical direction, thereby further improving its operating efficiency and extending its service life.

[0017] like Figure 1 、 Figure 2 and Figure 3 As shown, the lower part of the drill rod 1 has a cavity 5 with a downward opening, and the cavity 5 is provided with a spring 6 and a tunneling head in sequence from top to bottom; the tunneling head includes a tunneling head body 71 and two baffles 72 welded to the upper part of the tunneling head body 71 at intervals, the outer diameters of the two baffles 72 are consistent with the inner diameter of the cavity 5, and the lower end of the tunneling head is spike-shaped; the tunneling head body 71 is formed by two steel plates welded in a "cross" shape; the lower end of the drill rod 1 is detachably connected to an end plate 8, and the end plate 8 is provided with a cross hole 81 for the tunneling head body 71 to pass through.

[0018] Limited by the cross hole 81 in the end plate 8, the boring head can only slide up and down within the cavity 5. During rotary drilling, if the boring head encounters hard geology and is temporarily unable to break through, it will automatically retract as the drill bit continues to descend, causing spring 6 to accumulate force. This retraction process acts as a buffer for the entire drill bit, thereby protecting the spiral disk 3 from damage due to excessive force. After the boring head breaks through the rock, the restoring force of spring 6 causes it to rapidly advance downward, following the entire drill bit in its continued downward drilling operation. The presence of the elastic boring head allows it to automatically adjust its downward speed according to the hardness of the geology, thereby preventing damage to the spiral disk 3 due to excessive vertical resistance, further extending the service life of the drill bit.

[0019] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A spiral drilling drill bit, characterized in that: The drill bit comprises a drill rod; a square head (2) is welded to the top of the drill rod (1), and a tunneling head is provided at the bottom of the drill rod (1); a spiral disk (3) is welded to the outer peripheral surface of the drill rod (1), and a plurality of notches (31) are provided at intervals on the outer peripheral surface of the spiral disk (3), and a wear-resistant layer is welded in each notch (31); a plurality of pick seats (4) are welded obliquely to the bottom end of the spiral disk (3) at the lower part of the drill rod (1), and a plurality of picks (41) are installed on each pick seat (4).

2. The spiral drilling drill bit according to claim 1, characterized in that: The lower part of the drill rod (1) has a cavity (5) with an opening facing downward, and the cavity (5) is provided with a spring (6) and a tunneling head in sequence from top to bottom; the tunneling head comprises a tunneling head body (71) and two baffles (72) welded to the upper part of the tunneling head body (71) at intervals, the outer diameters of the two baffles (72) both match the inner diameter of the cavity (5), and the lower end of the tunneling head is spike-shaped; the tunneling head body (71) is formed by welding two steel plates in a "cross" shape; the lower end of the drill rod (1) is detachably connected to an end plate (8), and the end plate (8) is provided with a cross hole (81) for the tunneling head body (71) to pass through.

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