Adjustable core underreaming drill bit

Abstract

The utility model relates to the technical field of building foundation construction equipment, and discloses an adjustable core underreaming drill bit which comprises a drill barrel, an anti-torsion stand column and two underreaming drill rods which are symmetrically distributed, an inverted-U-shaped base is fixedly installed at the upper end of the drill barrel, the anti-torsion stand column sequentially penetrates through the inverted-U-shaped base and the top of the drill barrel in a sliding mode from top to bottom, and the anti-torsion stand column is fixedly installed at the upper end of the drill barrel. A plurality of transverse screw holes are formed in the side portion of the anti-torsion stand column at intervals, a check block shaped like a Chinese character'hui 'is slidably connected to the portion, located above the inverted-U-shaped base, outside the anti-torsion stand column in a sleeved mode, the side portion of the check block shaped like the Chinese character'hui' is connected with a positioning stud in a penetrating and threaded mode, and the positioning stud is matched with the transverse screw holes. A longitudinal check block is fixedly connected to the portion, located in the drilling barrel, of the outer portion of the torsion-resistant stand column in a sleeved mode, and a transverse guide seat is fixedly connected to the interior of the drilling barrel. According to the reaming drill rod, the reaming drill rod can stretch out to the needed position in the operation state, so that the diameter specification of a reamed bottom hole can be adjusted, and different reaming operation requirements can be conveniently met.

Description

Technical Field

[0001] The utility model relates to the technical field of building foundation construction equipment, and more specifically, to an adjustable core bottom enlarging drill bit. Background Art

[0002] The foundation is the ground that supports the building and can also withstand the construction of the entire house. It plays a very important role in the durability of the building. In the construction process of modern building foundations, the foundation piles drilled by rotary drilling bits are not strong enough to withstand pressure. In order to meet the construction requirements, core drilling bits are used to expand the holes.

[0003] When the existing core bottom expanding drill bit is used for expanding holes, since the extended position of the reaming drill rod is fixed in the operating state, it can only expand a bottom hole of a single diameter specification, which makes it difficult to meet the needs of different reaming operations and has a relatively limited scope of application. Based on this, the utility model designs an adjustable core bottom expanding drill bit to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide an adjustable core bottom enlarging drill bit to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The top end of the drill string is fixedly mounted on the U-shaped seat, and the bottom end of the drill string is fixedly mounted on the U-shaped seat.

[0007] As a preferred technical solution of the present invention, two transverse stoppers are fixedly sleeved on the outside of the transverse guide seat at intervals, and the two transverse stoppers are symmetrically distributed.

[0008] As a preferred technical solution of the present invention, a reinforcement screw groove is provided on the inner side of the circular stopper, and the positioning stud is adapted to the reinforcement screw groove.

[0009] As a preferred technical solution of the present invention, the end of the positioning stud is fixedly connected to a knob block, and the cross-section of the knob block is a regular hexagon.

[0010] As a preferred technical solution of the present invention, the upper end of the anti-torsion column is fixedly connected to a square box, a mounting groove is provided on the surface of the square box, and a connecting pin hole communicating with the mounting groove is provided on the side of the square box.

[0011] As a preferred technical solution of the present invention, two reinforcing ribs are fixedly connected between the reaming drill rod and the side seat, and the two reinforcing ribs are symmetrically distributed.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] The utility model discloses a method for drilling hole expansion, wherein the hole expansion is carried out in a predetermined manner and the drilling rod is driven to drill the hole in a predetermined direction, thereby reducing the drilling time and the drilling rod being drilled. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic cross-sectional view of the adjustable core reaming drill bit of the utility model when the reaming drill rod is extended;

[0015] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A;

[0016] Figure 3 This is a schematic cross-sectional view of the adjustable core reaming drill bit of the utility model after the reaming drill rod is retracted;

[0017] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of part B.

[0018] In the figure: 1. drill barrel; 101. transverse guide seat; 102. through port; 103. transverse stopper; 2. reaming drill rod; 3. inverted U-shaped seat; 4. anti-torsion column; 401. transverse screw hole; 402. circular stopper; 4021. positioning stud; 4022. reinforcement screw groove; 4023. knob block; 403. first connecting piece; 404. longitudinal stopper; 5. square box; 501. mounting slot; 502. connecting pin hole; 6. side seat; 601. second connecting piece; 7. transmission rod; 8. reinforcement rib. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figures 1 to 4 As shown, the utility model provides an adjustable core bottom expansion drill bit, including a drill barrel 1, an anti-torsion column 4 and two symmetrically distributed reaming drill rods 2, the upper end of the drill barrel 1 is fixedly installed with an inverted U-shaped seat 3, the anti-torsion column 4 slides from top to bottom in sequence through the inverted U-shaped seat 3 and the top of the drill barrel 1, a plurality of transverse screw holes 401 are spaced apart on the side of the anti-torsion column 4, a circular stopper 402 is slidably sleeved on the top of the inverted U-shaped seat 3 outside the anti-torsion column 4, and a positioning stud 4021 is threadedly connected to the side of the circular stopper 402, which is adapted to the transverse screw hole 401, and the circular stopper 402 can be slid along the anti-torsion column 4 to a desired height position, and the positioning stud 4021 is threadedly connected to the corresponding transverse screw hole 401, so that the circular stopper 402 can be slid to a desired height position along the anti-torsion column 4, and the positioning stud 4021 is threadedly connected to the corresponding transverse screw hole 401, so that the circular stopper 402 can be slid to a desired height position along the anti-torsion column 4 The column 4 is tightened, and the descent of the circular stopper 402 is blocked by the inverted U-shaped seat 3, thereby limiting the descending range of the anti-torsion column 4 along the drill barrel 1. The outside of the anti-torsion column 4 is located in the drill barrel 1 and is fixedly sleeved with a longitudinal stopper 404. The inside of the drill barrel 1 is fixedly connected to a transverse guide seat 101. One end of the reaming drill rod 2 is fixedly connected to a side seat 6. The side seat 6 is slidably sleeved on the outside of the transverse guide seat 101. The anti-torsion column 4 is symmetrically hinged to two transmission rods 7 through a first connecting member 403. The side seat 6 is movably hinged to the bottom end of the transmission rod 7 through a second connecting member 601. A through opening 102 is opened at the side of the drill barrel 1 and the corresponding position of the reaming drill rod 2, so that the anti-torsion column 4 can be lifted and lowered along the drill barrel 1 to drive the reaming drill rod 2 to extend and retract through the through opening 102.

[0021] Among them, Figure 4 As shown, two transverse blocks 103 are fixedly sleeved on the outside of the transverse guide seat 101 at intervals. The two transverse blocks 103 are symmetrically distributed. If the anti-torsion column 4 rises to the highest point along the drill barrel 1, the transverse block 103 can be used to block the side seat 6, and at the same time, the longitudinal block 404 can block the anti-torsion column 4, so that the reaming drill rod 2 is retracted into the drill barrel 1.

[0022] Among them, Figure 2As shown, a reinforcement groove 4022 is opened on the inner side of the circular stopper 402, and the positioning stud 4021 is adapted to the reinforcement groove 4022. One end of the positioning stud 4021 can be threadedly connected to the reinforcement groove 4022, which can have a good reinforcement effect on the positioning stud 4021.

[0023] Among them, Figure 2 As shown, the end of the positioning stud 4021 is fixedly connected to a knob block 4023 , and the cross-section of the knob block 4023 is a regular hexagon. The knob block 4023 is used to facilitate the screwing and rotation of the positioning stud 4021 .

[0024] Among them, Figure 3 As shown, the upper end of the anti-torsion column 4 is fixedly connected to a square box 5, the surface of the square box 5 is provided with a mounting groove 501, and the side of the square box 5 is provided with a connecting pin hole 502 connected to the mounting groove 501, through which the square box 5 can be assembled with the driving end of the rotary drilling equipment.

[0025] Among them, Figure 3 As shown, two reinforcing ribs 8 are fixedly connected between the reaming drill rod 2 and the side seat 6. The two reinforcing ribs 8 are symmetrically distributed, thereby achieving the purpose of improving the structural strength of the connection between the reaming drill rod 2 and the side seat 6.

[0026] The working principle of this utility model:

[0027] When using the core bottom reaming drill bit, if it is necessary to adjust the diameter of the expanded bottom hole according to the requirements of the reaming operation, loosen the positioning screw 4021, slide the circular stopper 402 along the anti-torsion column 4 to the required height position, and the positioning screw 4021 is threadedly connected to the corresponding transverse screw hole 401, so that the circular stopper 402 is fastened to the anti-torsion column 4, and the downward movement of the circular stopper 402 is blocked by the inverted U-shaped seat 3, thereby limiting the downward movement of the anti-torsion column 4 along the drill barrel 1. The drill pipe 1 is inserted into the bottom of the hole, and the anti-torsion column 4 is driven to descend along the drill pipe 1 by the rotary drilling equipment, which can drive the reaming drill rod 2 to extend to the required position in the working state, so as to expand the bottom hole of the corresponding diameter specification. After the reaming operation is completed, the anti-torsion column 4 is driven to rise to the highest point along the drill pipe 1 by the rotary drilling equipment, and the side seat 6 can be blocked by the horizontal block 103. At the same time, the longitudinal block 404 can block the anti-torsion column 4, and the reaming drill rod 2 can be retracted into the drill pipe 1.

[0028] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable core bottom drill bit, characterized by: It comprises a drill tube (1), an anti-torsion column (4) and two symmetrically distributed reaming drill rods (2); The upper end of the drill tube (1) is fixedly mounted with an inverted U-shaped seat (3), and the anti-torsion column (4) slides through the inverted U-shaped seat (3) and the top of the drill tube (1) from top to bottom in sequence. A plurality of transverse screw holes (401) are spaced apart on the side of the anti-torsion column (4). The anti-torsion column (4) is located above the inverted U-shaped seat (3) and is slidably sleeved with a circular stopper (402). The side of the circular stopper (402) is threadedly connected with a positioning stud (4021), and the positioning stud (4021) is adapted to the transverse screw hole (401). The outside of the anti-torsion column (4) is located in the drill tube (1) and is fixedly sleeved with a longitudinal stopper (404). The interior of the drill barrel (1) is fixedly connected to a transverse guide seat (101), one end of the reaming drill rod (2) is fixedly connected to a side seat (6), and the side seat (6) is slidably sleeved on the outside of the transverse guide seat (101). The anti-torsion column (4) is symmetrically hinged to two transmission rods (7) through a first connecting member (403), and the side seat (6) is hinged to the bottom end of the transmission rod (7) through a second connecting member (601). A through opening (102) is opened at a position corresponding to the side of the drill barrel (1) and the reaming drill rod (2).

2. The adjustable core bottom enlargement drill bit according to claim 1, characterized in that: Two transverse stoppers (103) are fixedly sleeved on the outside of the transverse guide seat (101) at intervals, and the two transverse stoppers (103) are symmetrically distributed.

3. The adjustable core bottom enlargement drill bit according to claim 1, characterized in that: A reinforcement screw groove (4022) is provided on the inner side of the circular stopper (402), and the positioning screw bolt (4021) is adapted to the reinforcement screw groove (4022).

4. The adjustable core bottom enlargement drill bit according to claim 3, characterized in that: The end of the positioning stud (4021) is fixedly connected to a knob block (4023), and the cross-sectional shape of the knob block (4023) is a regular hexagon.

5. The adjustable core bottom enlargement drill bit according to claim 1, characterized in that: The upper end of the anti-torsion column (4) is fixedly connected to a square box (5), a surface of the square box (5) is provided with a mounting groove (501), and a side of the square box (5) is provided with a connecting pin hole (502) connected to the mounting groove (501).

6. The adjustable core bottom enlargement drill bit according to claim 1, characterized in that: Two reinforcing ribs (8) are fixedly connected between the reaming drill rod (2) and the side seat (6), and the two reinforcing ribs (8) are symmetrically distributed.

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