Rotary excavating drill bit with reaming function

Abstract

The utility model provides a rotary excavating drill bit with a reaming function, and belongs to the technical field of logistics scanning equipment. Comprising a drill cylinder, a top plate and a square head, an openable bottom plate is arranged at the bottom of the drill cylinder, and the top plate is welded to the top end of the drill cylinder; a plurality of first feeding ports are formed in the top plate, a plurality of reinforcing plates are welded between the top plate and the square head, and each first feeding port is located between the two reinforcing plates; a plurality of scrapers are hinged to the upper surface of the top plate and located at the edge of the first feeding port, and all the scrapers are hinged to the top plate through bolts; each scraping blade is bent towards one side of the corresponding first feeding hole, and when each scraping blade is unfolded outwards, each reinforcing plate can block the adjacent scraping blade so as to prevent each scraping blade from continuously expanding outwards and rotating; a plurality of second feeding ports are distributed in the bottom plate, and cutting teeth are arranged at the positions, at the feeding ports, of the bottom plate. The drill bit has the advantage that pile foundation holes with different hole diameters can be drilled without replacing the drill bit.

Description

Technical Field

[0001] The utility model belongs to the technical field of pile foundation construction equipment and relates to a rotary drilling bit with a self-expanding hole function. Background Art

[0002] During pile foundation drilling, different diameters of pile holes are required due to different pile foundation construction requirements. The current practice is to replace drill bits of different diameters to perform drilling operations, which is time-consuming and labor-intensive, and difficult to improve operational efficiency. Therefore, we have designed a drill bit that can simultaneously expand the hole while drilling, allowing pile holes of different diameters to be drilled according to pile foundation construction requirements without replacing the drill bit. Utility Model Content

[0003] The purpose of the utility model is to address the above-mentioned problems existing in the existing technology and to provide a rotary drilling drill bit with a self-expanding function, so that it can expand the hole at the same time as drilling, and thus can drill two pile foundation holes with different hole diameters without changing the drill bit.

[0004] The purpose of the utility model can be achieved through the following technical solutions: a rotary drilling bit with a built-in hole expansion function, characterized in that the drill bit includes a drill barrel, a top plate and a square head, the bottom of the drill barrel is provided with an openable and closable bottom plate, and the top plate is welded to the top of the drill barrel; a plurality of first feed ports are provided on the top plate, and a plurality of reinforcing plates are welded between the top plate and the square head, and each first feed port is located between the two reinforcing plates; a plurality of scrapers are hinged on the upper surface of the top plate at the edge of the first feed port, and each scraper is hinged to the top plate by a bolt; each scraper is bent toward the corresponding first feed port, and when each scraper is expanded outward, each reinforcing plate can block the adjacent scraper to prevent each scraper from continuing to expand and rotate outward; a plurality of second feed ports are distributed on the bottom plate, and a cutting tooth is provided at each feed port on the bottom plate.

[0005] Preferably, each of the bolts is sleeved with a pair of washers, both washers are located above the scraper, and a spring is provided between the two washers.

[0006] The utility model has the advantages:

[0007] The top of the rotary drilling drill bit is provided with a plurality of scrapers that can be expanded or retracted, so that the drilling operation of pile foundation holes of different diameters can be achieved without replacing the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the three-dimensional structure of the rotary drilling drill bit.

[0009] Figure 2 It is a schematic diagram of the three-dimensional structure of the rotary drilling bit from another perspective.

[0010] Figure 3 yes Figure 1 Enlarged view of part A in the middle.

[0011] In the figure, 1, drill barrel; 2, top plate; 21, first feed port; 3, square head; 4, bottom plate; 41, second feed port; 42, pick; 5, reinforcement plate; 6, scraper; 61, bolt; 62, washer; 63, spring. DETAILED DESCRIPTION

[0012] 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.

[0013] like Figure 1 、 Figure 2 and Figure 3 As shown, a rotary drilling bit with a built-in hole expansion function includes a drill barrel 1, a top plate 2 and a square head 3. The bottom of the drill barrel 1 is provided with an openable bottom plate 4, and the top plate 2 is welded to the top of the drill barrel 1; a plurality of first feed ports 21 are provided on the top plate 2, and a plurality of reinforcing plates 5 are welded between the top plate 2 and the square head 3, and each first feed port 21 is located between the two reinforcing plates 5; a plurality of scrapers 6 are hinged on the upper surface of the top plate 2 at the edge of the first feed port 21, and each scraper 6 is hinged to the top plate 2 by a bolt 61; each scraper 6 is bent toward the side of the corresponding first feed port 21; each scraper 6 can be completely retracted into the arc surface where the drill barrel 1 is located, and when each scraper 6 is expanded outward, each reinforcing plate 5 can block the adjacent scraper 6 to prevent each scraper 6 from continuing to expand and rotate outward; a plurality of second feed ports 41 are distributed on the bottom plate 4, and a cutting tooth 42 is provided at each feed port on the bottom plate 4.

[0014] Working Principle: Each scraper blade 6 is hinged to the top of the rotary drill bit, so we can expand or retract each scraper blade 6 according to the required hole diameter. For example, if the outer diameter of this rotary drill bit is 1 meter and its scraper blade 6 is 0.1 meter long, then when the scraper blade 6 is retracted, a pile foundation hole with a diameter of 1 meter can be opened in the ground. When a pile foundation hole with a diameter of 1.2 meters is required, the scraper blades 6 can be expanded until they are blocked by the reinforcing plates 5 and cannot be further expanded. At this time, the pick teeth 42 will work first, opening a hole with a diameter of 1 meter in the ground. At the same time, the pick teeth 42 can guide soil into the drill barrel 1. However, as the rotary drill bit continues to rotate, the scraper blades 6 begin to contact the ground and continue to dig around the previously opened hole, expanding its diameter to 1.2 meters. Furthermore, since each scraper 6 is bent toward the first feed port 21 , during the rotary drilling process, it can guide the excavated soil into the box and eventually drop it into the drill tube 1 through each first feed port 21 .

[0015] like Figure 1 and Figure 2Each bolt 61 is fitted with a pair of washers 62, both located above the scraper blade 6. A spring 63 is positioned between the two washers 62. The spring 63 acts as a buffer for the scraper blade 6. When the scraper blade 6 encounters rocky terrain, making it difficult to dig, the spring 63 can be moved to temporarily avoid the rock. When the rock becomes loose during further excavation, it can be removed. This protects the scraper blade 6 and extends the drill bit's service life and maintenance cycle. The washers at each end of the spring 63 prevent the scraper blade 6 from rotating and damaging the spring 63.

[0016] 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 rotary drilling bit with self-expanding function, characterized in that: The drill bit comprises a drill tube (1), a top plate (2) and a square head (3); the bottom of the drill tube (1) is provided with an openable bottom plate (4), and the top plate (2) is welded to the top of the drill tube (1); a plurality of first feed ports (21) are provided on the top plate (2); a plurality of reinforcing plates (5) are welded between the top plate (2) and the square head (3); each first feed port (21) is located between two reinforcing plates (5); the upper surface of the top plate (2) is hinged at the edge of the first feed port (21) A plurality of scrapers (6) are connected, and each scraper (6) is hinged to the top plate (2) by a bolt (61); each scraper (6) is bent toward the corresponding first feed port (21), and when each scraper (6) is expanded outward, each reinforcing plate (5) can block the adjacent scraper (6) to prevent each scraper (6) from continuing to expand and rotate outward; a plurality of second feed ports (41) are distributed on the bottom plate (4), and a cutting tooth (42) is provided at each feed port on the bottom plate (4).

2. The rotary drilling bit with self-expanding function according to claim 1, characterized in that: A pair of washers (62) is sleeved on each of the bolts (61), the two washers (62) are both located above the scraper (6), and a spring (63) is provided between the two washers (62).

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