A triangular spiral long auger drill bit facilitating hole formation in a gravel layer

Abstract

This utility model discloses a triangular spiral long spiral drilling bit for facilitating hole formation in pebble layers. It includes: a drill rod with spiral blades welded to its outer side, and a first cutting tooth fixedly disposed on the edge of each spiral blade, the first cutting tooth being spirally arranged; and a drill bit structure fixedly disposed at the bottom of the drill rod, with side cutting teeth disposed on its outer side. The drill bit structure includes: a disc, a fixed column, and main cutting teeth. The disc is movably disposed at the bottom end of the drill rod, the fixed column is welded to the bottom of the disc, and a reinforcing plate is welded between the fixed column and the disc. The main cutting tooth is fixedly disposed at the bottom of the fixed column, and two sets of side cutting teeth are disposed on both sides of the main cutting tooth. The main cutting tooth and side cutting teeth of this utility model can work together, effectively enhancing the drilling efficiency in pebble layers, enabling successful hole formation in pebble layers, and achieving efficient drilling, greatly improving construction efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of long spiral drilling machine drill bits, and more specifically, it relates to a triangular spiral long spiral drilling machine drill bit that is convenient for drilling into pebble layers. Background Technology

[0002] In the field of foundation engineering construction, long spiral drilling rigs are widely used in various pile foundation constructions due to their advantages such as high efficiency and environmental friendliness. Traditional long spiral drilling rigs typically use a relatively conventional drill bit structure, which can effectively complete hole-forming operations and meet construction requirements when facing general geological conditions.

[0003] However, when encountering complex geological conditions such as pebble layers at the construction site, existing long spiral drilling rigs have the following technical problems and shortcomings: First, the drill bit structure of traditional long spiral drilling rigs is difficult to effectively cope with the obstruction of pebbles during drilling; Second, due to the lack of a targeted structure, the drill bit cannot smoothly break and remove pebbles during drilling, resulting in obstruction of the hole formation process, making it difficult to form regular holes and seriously affecting the hole quality; Third, during drilling, the drill bit frequently collides and rubs violently with the pebbles, which can easily cause damage to the drill bit, such as wear and breakage of the drill bit cutting teeth and deformation of the drill rod. This not only increases the cost of equipment maintenance and replacement but also hinders the construction progress. Utility Model Content

[0004] The purpose of this utility model is to provide a triangular spiral long spiral drill bit that facilitates drilling into pebble layers. It can solve the technical problem mentioned in the background that the drill bit cannot smoothly break and remove pebbles during drilling, which leads to obstruction of the drilling process and makes it difficult to smoothly form holes in pebble layers.

[0005] To achieve the above objectives, this utility model provides a triangular spiral long spiral drilling bit for facilitating hole formation in pebble layers, comprising: a drill rod, with spiral blades welded to the outer side of the drill rod, and a first cutting tooth fixedly provided on the edge of the spiral blade, the first cutting tooth being spirally arranged; a drill bit structure, the drill bit structure being fixedly provided at the bottom of the drill rod, and side cutting teeth provided on the outer side of the drill bit structure; wherein, the drill bit structure includes: a disc, a fixed column, and a main cutting tooth, the disc being movably disposed at the bottom end of the drill rod, the fixed column being welded to the bottom of the disc, and a rib being welded between the fixed column and the disc, the main cutting tooth being fixedly disposed at the bottom of the fixed column, and side cutting teeth being provided on both sides of the main cutting tooth, and two sets of side cutting teeth being provided.

[0006] In a preferred embodiment, a first adjustment component is fixedly provided on both sides of the bottom of the disc, and a second adjustment component is provided inside the first adjustment component. Both the first adjustment component and the second adjustment component are provided in two places. A flange is welded to the top of the drill rod. A connecting groove is opened inside the bottom side of the drill rod. A positioning groove is opened inside the bottom side of the drill rod, and the positioning groove communicates with the connecting groove. A connecting hole is opened inside the drill rod, and four sets of connecting holes are symmetrically opened.

[0007] In a preferred embodiment, the drill bit structure further includes: a connecting plate, a positioning plate, a connecting bolt, and a connecting nut. The connecting plate is welded to the top of the disc and is movably disposed inside the connecting groove. The positioning plate is welded between the connecting plate and the disc and is movably disposed inside the positioning groove. Mounting holes are provided inside both sides of the connecting plate. The connecting bolt is movably disposed between the mounting hole and the connecting hole. The connecting nut is threadedly disposed on the outside of the connecting bolt and fits against the outside of the drill rod.

[0008] In a preferred embodiment, the first adjustment component includes: a fixed seat, an adjustment seat, an adjustment bolt, and a locking nut. The fixed seat is welded between the bottom of the disc and the fixed post. Adjustment holes are provided inside both sides of the fixed seat, and the adjustment holes are arranged in a straight line. The adjustment seat is movably disposed inside the fixed seat. The adjustment seat has a circular hole inside, and one set of adjustment seats has two sets of circular holes inside. The adjustment bolt is movably disposed between the adjustment hole and the circular hole. The locking nut is threadedly disposed on the outside of the adjustment bolt, and the outside of the locking nut is in contact with the outside of the fixed seat.

[0009] In a preferred embodiment, a threaded hole is provided inside one side of the adjusting seat, and the threaded holes are arranged in a ring array.

[0010] In a preferred embodiment, the second adjustment component includes: an adjustment shaft, a connecting column, an adjustment disc, and a control bolt. The adjustment shaft is rotatably disposed inside the adjustment seat. The connecting column is fixedly disposed outside the adjustment shaft, and a side cutting tooth is fixedly disposed at the end of the connecting column. The adjustment disc is fixedly disposed at the end of the adjustment shaft. The adjustment disc has auxiliary holes inside, and the auxiliary holes are arranged in a ring array. The number of auxiliary holes is the same as the number of threaded holes. The control bolt is movably disposed inside the auxiliary holes, and the control bolt is disposed inside the threaded holes through a threaded connection. The control bolt is arranged in a ring array.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. In this utility model, by setting a main cutting tooth at the bottom of the drill bit and rationally arranging side cutting teeth on both sides of the main cutting tooth, the main cutting tooth and the side cutting teeth can form a triangular helical structure together, enabling the main cutting tooth and the side cutting teeth to work together, effectively enhancing the crushing efficiency of the drill bit in the gravel layer, and enabling smooth hole formation in the gravel layer. At the same time, the helical blades welded to the outside of the drill rod cooperate with the first cutting tooth to form a good soil removal channel during drilling, significantly enhancing the soil removal capacity of the drill bit, and thus greatly increasing the hole formation speed. This utility model solves the technical problem that the drill bit cannot smoothly crush and remove gravel during drilling, resulting in obstruction of the hole formation process and making it difficult to smoothly form holes in the gravel layer.

[0012] 2. In this utility model, by adjusting the seat on the fixed seat and fixing the adjusting bolt and locking nut, the lateral position of the side cutting tooth can be initially adjusted. Then, by rotating the adjusting shaft and cooperating with the control bolt and threaded hole, the angle of the side cutting tooth can be adjusted. This allows for adjustment of the angle of the side cutting tooth and the distance between the side cutting tooth and the main cutting tooth, enabling the drill bit to flexibly adapt to different geological conditions. By adjusting the position and angle of the side cutting tooth, efficient drilling can be achieved, greatly improving the adaptability of construction.

[0013] 3. In this utility model, the disc and the drill rod are connected and fixed by connecting bolts and connecting nuts, which makes the installation and disassembly of the disc and the drill rod convenient and quick, greatly shortening the on-site preparation and replacement time and improving construction efficiency. At the same time, the main cutting teeth and the side cutting teeth are made of high-strength alloy materials, which can effectively resist wear and impact during the drilling process and reduce maintenance costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the lower surface structure of the drill rod of this utility model.

[0016] Figure 3 This is a schematic diagram of the upper surface structure of the disc of this utility model.

[0017] Figure 4 This is a schematic diagram of the lower surface structure of the disc of this utility model.

[0018] Figure 5 This is a schematic diagram of the connection structure between the first adjustment component and the second adjustment component of this utility model.

[0019] Figure 6 This is a schematic diagram of the disassembled structure of the second adjustment component of this utility model.

[0020] Explanation of reference numerals in the attached figures: 1. Drill rod; 101. Flange; 102. Spiral blade; 103. First cutting tooth; 104. Connecting groove; 105. Positioning groove; 106. Connecting hole; 2. Drill bit structure; 201. Disc; 202. Connecting plate; 203. Positioning plate; 204. Mounting hole; 205. Connecting bolt; 206. Connecting nut; 207. Fixing column; 208. Main cutting tooth; 3. Side cutting tooth; 4. First adjusting assembly; 401. Fixing seat; 402. Adjusting hole; 403. Adjusting seat; 404. Round hole; 405. Adjusting bolt; 406. Locking nut; 407. Threaded hole; 5. Second adjusting assembly; 501. Adjusting shaft; 502. Connecting column; 503. Adjusting disc; 504. Auxiliary hole; 505. Control bolt. Detailed Implementation

[0021] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0022] Example 1: As attached Figure 1 To be continued Figure 6 As shown, this utility model provides a triangular spiral long spiral drill bit for facilitating drilling through pebble layers. It includes a drill rod 1 and a drill bit structure 2. Spiral blades 102 are welded to the outer side of the drill rod 1, and first cutting teeth 103 are fixedly arranged on the edge of the spiral blades 102 in a spiral configuration. The drill bit structure 2 is fixedly arranged at the bottom of the drill rod 1, and side cutting teeth 3 are provided on the outer side of the drill bit structure 2.

[0023] The drill bit structure 2 includes: a disc 201, a fixed post 207, and a main cutting tooth 208. The disc 201 is movably disposed at the bottom end of the drill rod 1. The fixed post 207 is welded to the bottom of the disc 201, and a stiffener is welded between the fixed post 207 and the disc 201. The main cutting tooth 208 is fixedly disposed at the bottom of the fixed post 207, and side cutting teeth 3 are provided on both sides of the main cutting tooth 208. There are two sets of side cutting teeth 3. The first cutting tooth 103, the main cutting tooth 208, and the side cutting teeth 3 are all made of high-strength alloy material. By setting a main cutting tooth 208 at the bottom of the drill bit structure and rationally arranging side cutting teeth 3 on both sides of the main cutting tooth 208, the main cutting tooth 208 and the side cutting teeth 3 can form a triangular helical structure together, enabling the main cutting tooth 208 and the side cutting teeth 3 to work together, effectively enhancing the breaking efficiency of the drill bit in the gravel layer, and enabling smooth hole formation in the gravel layer. At the same time, the helical blade 102 welded to the outside of the drill rod 1 cooperates with the first cutting tooth 103 to form a good soil removal channel during drilling, significantly enhancing the soil removal capacity of the drill bit.

[0024] In this embodiment, a first adjusting component 4 is fixedly installed on both sides of the bottom of the disc 201, and a second adjusting component 5 is installed inside the first adjusting component 4. Both the first adjusting component 4 and the second adjusting component 5 are provided in two places. A flange 101 is welded to the top of the drill rod 1, and a connecting groove 104 is opened inside the bottom side of the drill rod 1; a positioning groove 105 is also opened inside the bottom side of the drill rod 1, and the positioning groove 105 communicates with the connecting groove 104; a connecting hole 106 is opened inside the drill rod 1, and four sets of connecting holes 106 are symmetrically arranged. The drill bit structure 2 also includes: a connecting plate 202, a positioning plate 203, a connecting bolt 205, and a connecting nut 206. The connecting plate 202 is welded to the top of the disc 201 and is movably disposed inside the connecting groove 104. The positioning plate 203 is welded between the connecting plate 202 and the disc 201 and is movably disposed inside the positioning groove 105. The mounting holes 204 are opened inside both sides of the connecting plate 202. The connecting bolt 205 is movably disposed between the mounting hole 204 and the connecting hole 106. The connecting nut 206 is threadedly disposed on the outside of the connecting bolt 205 and the outside of the connecting nut 206 is in contact with the outside of the drill rod 1.

[0025] Example 2: As attached Figure 4 With appendix Figure 5 As shown, based on Embodiment 1, the first adjusting component 4 includes: a fixed base 401, an adjusting base 403, an adjusting bolt 405, and a locking nut 406. The fixed base 401 is welded between the bottom of the disc 201 and the fixed post 207. Adjusting holes 402 are opened inside both sides of the fixed base 401 and are arranged in a straight line. The adjusting base 403 is movably disposed inside the fixed base 401, and round holes 404 are opened inside the adjusting base 403. Two sets of round holes 404 are opened inside one set of adjusting bases 403. The adjusting bolt 405 is movably disposed between the adjusting holes 402 and the round holes 404. The locking nut 406 is threadedly connected to the outside of the adjusting bolt 405, and the outside of the locking nut 406 is in contact with the outside of the fixed base 401. Threaded holes 407 are opened inside one side of the adjusting base 403 and are arranged in a ring array. By moving the adjusting seat 403 on the fixed seat 401 and fixing the adjusting bolt 405 and the locking nut 406, the lateral position of the side cutting tooth 3 can be initially adjusted, thereby enabling the adjustment of the distance between the side cutting tooth 3 and the main cutting tooth 208.

[0026] Example 3: As attached Figure 5 With appendix Figure 6As shown, based on Embodiments 1 and 2, the second adjustment component 5 includes: an adjustment shaft 501, a connecting column 502, an adjustment disc 503, and a control bolt 505. The adjustment shaft 501 is rotatably disposed inside the adjustment seat 403. The connecting column 502 is fixedly disposed outside the adjustment shaft 501, and a side cutting tooth 3 is fixedly disposed at the end of the connecting column 502. The adjustment disc 503 is fixedly disposed at the end of the adjustment shaft 501. An auxiliary hole 504 is opened inside the adjustment disc 503, and the auxiliary holes 504 are arranged in a ring array. The number of auxiliary holes 504 is the same as the number of threaded holes 407. The control bolt 505 is movably disposed inside the auxiliary hole 504, and the control bolt 505 is threadedly connected to the threaded hole 407. The control bolt 505 is arranged in a ring array. By rotating the adjustment shaft 501, combined with the cooperation of the control bolt 505 and the threaded hole 407, the angle of the side cutting tooth 3 can be adjusted.

[0027] Example 4: The specific usage method of this utility model is described below: In use, the connecting plate 202 is aligned with the connecting groove 104, ensuring that the connecting plate 202 is fully inserted into the connecting groove 104. Simultaneously, the positioning plate 203 is ensured to accurately enter the positioning groove 105, serving both positioning and auxiliary fixing functions. The connecting bolts 205 are passed sequentially through the mounting holes 204 on both sides of the connecting plate 202 and the connecting holes 106 inside the drill rod 1. Then, the connecting nut 206 is fitted onto the outside of the connecting bolts 205, and a suitable tool is used to tighten the connecting nut 206, ensuring a tight fit between the outside of the connecting nut 206 and the outside of the drill rod 1, guaranteeing a stable connection between the drill bit structure 2 and the drill rod 1. Depending on the geological conditions, if a layer of large-diameter pebbles is encountered, the adjusting seat 403 is moved outwards inside the fixed seat 401, causing the side cutting teeth 3 to expand outwards; if a layer of small-diameter pebbles is encountered, the adjusting seat 403 is moved inwards, causing the side cutting teeth 3 to contract inwards. After adjusting the position of the adjusting seat 403, pass the adjusting bolt 405 through the adjusting hole 402 on the fixed seat 401 and the round hole 404 on the adjusting seat 403, and then tighten the locking nut 406 to ensure that the adjusting seat 403 is firmly fixed. According to the hardness and crushing difficulty of the geological surface, rotate the adjusting disc 503. The adjusting disc 503 drives the adjusting shaft 501 to rotate, which in turn drives the side cutting tooth 3 to rotate through the connecting column 502, adjusting the angle of the side cutting tooth 3. Adjust the side cutting tooth 3 to an angle that is more conducive to cutting into the pebble surface. After adjusting the angle of the side cutting tooth 3, pass the control bolt 505 through the auxiliary hole 504 on the adjusting disc 503 and screw it into the threaded hole 407 on the adjusting seat 403 to ensure that the control bolt 505 is tightened, so that the angle of the side cutting tooth 3 is fixed.

[0028] The main cutting tooth 208 and the side cutting tooth 3 together form a triangular helical structure. Then, the flange 101 at the top of the drill rod 1 is firmly connected to the power output end of the drilling rig using appropriate bolts and nuts. Start the long spiral drilling rig, and slowly rotate and descend the drill bit to begin drilling. During the drilling process, the first cutting tooth 103 on the outer spiral blade 102 of the drill rod 1 will initially break up the soil, while the spiral blade 102 will transport the broken drill cuttings upwards and discharge them.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A triangular spiral long spiral drill bit for facilitating drilling through pebble layers, characterized in that, include: The drill rod (1) has a spiral blade (102) welded to its outer side, and a first cutting tooth (103) is fixedly provided on the edge of the spiral blade (102), and the first cutting tooth (103) is spirally arranged. The drill bit structure (2) is fixedly installed at the bottom of the drill rod (1), and the drill bit structure (2) is provided with side cutting teeth (3) on the outside. The drill bit structure (2) includes a disc (201), a fixed column (207), and a main cutting tooth (208). The disc (201) is movably disposed at the bottom end of the drill rod (1). The fixed column (207) is welded to the bottom of the disc (201), and a reinforcing plate is welded between the fixed column (207) and the disc (201). The main cutting tooth (208) is fixedly disposed at the bottom of the fixed column (207), and side cutting teeth (3) are provided on both sides of the main cutting tooth (208), and two sets of side cutting teeth (3) are provided.

2. The triangular spiral long spiral drill bit for facilitating hole formation in pebble layers according to claim 1, characterized in that: The disc (201) is fixedly provided with a first adjustment component (4) on both sides of the bottom, and a second adjustment component (5) is provided inside the first adjustment component (4). Both the first adjustment component (4) and the second adjustment component (5) are provided in two places. The top of the drill rod (1) is welded with a flange (101). A connecting groove (104) is opened inside the bottom side of the drill rod (1). A positioning groove (105) is opened inside the bottom side of the drill rod (1). The positioning groove (105) communicates with the connecting groove (104). A connecting hole (106) is opened inside the drill rod (1). The connecting holes (106) are symmetrically arranged in four sets.

3. The triangular spiral long spiral drill bit for facilitating hole formation in pebble layers according to claim 2, characterized in that: The drill bit structure (2) further includes: a connecting plate (202), a positioning plate (203), a connecting bolt (205), and a connecting nut (206). The connecting plate (202) is welded to the top of the disc (201) and is movably disposed inside the connecting groove (104). The positioning plate (203) is welded between the connecting plate (202) and the disc (201) and is movably disposed inside the positioning groove (105). The connecting plate (202) has mounting holes (204) on both sides. The connecting bolt (205) is movably disposed between the mounting hole (204) and the connecting hole (106). The connecting nut (206) is threaded and disposed on the outside of the connecting bolt (205), and the outside of the connecting nut (206) is in contact with the outside of the drill rod (1).

4. The triangular spiral long spiral drill bit for facilitating hole formation in pebble layers according to claim 2, characterized in that: The first adjustment component (4) includes: a fixed seat (401), an adjustment seat (403), an adjustment bolt (405), and a locking nut (406). The fixed seat (401) is welded between the bottom of the disc (201) and the fixed column (207). Adjustment holes (402) are provided inside both sides of the fixed seat (401), and the adjustment holes (402) are arranged in a straight line. The adjustment seat (403) is movably disposed inside the fixed seat (401). A round hole (404) is provided inside the adjustment seat (403), and two sets of round holes (404) are provided inside one set of adjustment seats (403). The adjustment bolt (405) is movably disposed between the adjustment hole (402) and the round hole (404). The locking nut (406) is provided outside the adjustment bolt (405) by threaded connection, and the outside of the locking nut (406) is in contact with the outside of the fixed seat (401).

5. The triangular spiral long spiral drill bit for facilitating hole formation in pebble layers according to claim 4, characterized in that: The adjusting seat (403) has a threaded hole (407) inside one side, and the threaded hole (407) is arranged in a ring array.

6. The triangular spiral long spiral drill bit for facilitating hole formation in pebble layers according to claim 5, characterized in that: The second adjustment component (5) includes: an adjustment shaft (501), a connecting column (502), an adjustment plate (503), and a control bolt (505). The adjustment shaft (501) is rotatably disposed inside the adjustment seat (403). The connecting column (502) is fixedly disposed outside the adjustment shaft (501), and a side cutting tooth (3) is fixedly disposed at the end of the connecting column (502). The adjustment plate (503) is fixedly disposed at the end of the adjustment shaft (501). An auxiliary hole (504) is opened inside the adjustment plate (503), and the auxiliary holes (504) are arranged in a ring array. The number of auxiliary holes (504) is the same as the number of threaded holes (407). The control bolt (505) is movably disposed inside the auxiliary hole (504), and the control bolt (505) is disposed inside the threaded hole (407) through a threaded connection. The control bolt (505) is arranged in a ring array.

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