Self-tapping drilling tool for expansion self-compaction compaction pile

Abstract

The utility model discloses a self-tapping drilling tool for expanding a self-compacting compaction pile, which belongs to the technical field of civil construction and comprises a rod body, a mounting groove is arranged at the top of the rod body, a mounting block is mounted in the mounting groove through a screw and fixedly connected with the end of an output shaft of a spiral drilling machine, and a pointed cone is mounted at the lower end of the rod body. A packing cavity is formed in the rod body, a motor is installed in the rod body, an output shaft of the motor is in transmission connection with a threaded rod, the outer ring of the threaded rod is in threaded connection with a movable sleeve rod, the end of the movable sleeve rod is fixedly connected with the pointed cone, and a scraper is fixedly connected to the outer wall of the movable sleeve rod and moves in the packing cavity. The threaded rod and the movable sleeve rod are connected in an anti-disengaging mode through a limiting assembly. The rotary self-tapping device is drilled into a soil layer in a rotary self-tapping mode, filler attached to the inner wall of the filler cavity is cleaned through the scraper blade when expansion materials are injected, the attachment degree of the filler is reduced, and the construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to civil engineering construction technical field relates to a kind of self-tapping drill for expansion self-real extrusion pile. BACKGROUND

[0002] Self-tapping screw is the core component in expansion self-real extrusion pile construction, and it is drilled into soil layer by rotating self-tapping mode, while injecting expansion material around pile, and it compacts surrounding soil body by using material expansion pressure, to form high-density pile structure.

[0003] The patent with publication number CN116289953A discloses a hole-in helical filler ramming pile-forming method and pile-driving drill implementing the method, and the advancing helix is installed in a hollow channel to store pile body material for pouring; the filler is prone to be retained in the hollow channel. The expanded filler is prone to be adhered to metal after solidification, which is difficult to remove, increases friction and reduces construction efficiency. SUMMARY

[0004] To solve the above problems, the utility model provides a kind of self-tapping drill for expansion self-real extrusion pile, by rotating self-tapping hole-forming, the filler adhered to the inner wall of filler cavity is cleaned by scraper when injecting expansion material, to reduce the adhesion degree of filler and improve construction efficiency.

[0005] The utility model discloses a kind of self-tapping drill for expansion self-real extrusion pile, including stem, the top of the stem is provided with mounting slot, the inside of the mounting slot is installed with mounting block by screw, the mounting block is fixedly connected with the output shaft end of spiral drill, the lower end of the stem is installed with sharp cone, the inside of the stem is provided with filler cavity, the inside of the stem is embedded with motor, the output shaft of the motor is connected with threaded rod in transmission, the outer circle of the threaded rod is connected with movable sleeve rod in thread, the end of movable sleeve rod is fixedly connected with sharp cone, the outer wall of movable sleeve rod is fixedly connected with scraper, scraper moves in the inside of filler cavity, the threaded rod and movable sleeve rod are prevented from being connected by limiting component.

[0006] Further, the inner wall of the filler cavity is in contact with the outer wall of the scraper, and can slide up and down relative to each other, the scraper has an arc chamfer, which matches the arc chamfer of the filler cavity; the inside of the filler cavity is provided with a feed port, which is located below the initial state position of the scraper.

[0007] Further, the inside of the movable sleeve rod is reserved with a threaded groove with an open top, and the threaded groove is threadedly connected with the threaded rod.

[0008] Further, the limiting component includes an annular groove pre-set in the inside of the threaded rod, the annular groove is rotatably connected with an annular block in the inside, and there is a gap between the outer annular wall of the annular block and the inner wall of the threaded groove reserved in the inner circle of the movable sleeve rod.

[0009] Further, the limiting assembly further comprises two limiting blocks fixedly connected to the outer wall of the annular block, the two limiting blocks are symmetrically arranged about the central axis of the annular block, the inner wall of the movable sleeve rod is provided with two symmetric vertical grooves, the limiting blocks extend into the vertical grooves, and the vertical grooves are in communication with the threaded grooves reserved in the interior of the movable sleeve rod.

[0010] Further, the lower end of the vertical groove is flush with the lower end of the threaded groove, and the upper end of the vertical groove is closed.

[0011] Further, the top of the sharp cone body is fixedly connected with a vertical rod, and the vertical rod is movably connected with the reserved groove in the interior of the rod body.

[0012] The utility model discloses the beneficial effect is:

[0013] The utility model discloses the operation of spiral drill rig makes the rod body rotate and self -tapping hole, and subsequently lifts the rod body, and the motor is driven to rotate the threaded rod, and the movable sleeve rod and the scraper move down, at this time, the sharp cone body and the movable sleeve rod are synchronous and move down and produce the clearance with the lower end portion of the rod body, and the filler cavity inside expands and leaks and injects into the hole, simultaneously, the synchronous movable sleeve rod of scraper can clean the filler adhered to the inner wall of the filler cavity, and the adhesion and waste of filler are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, and obviously, the drawing in the following description is only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

[0015] Figure 1 It is the overall structure perspective drawing of the utility model.

[0016] Figure 2 It is the overall structure explosion drawing of the utility model.

[0017] Figure 3 It is the internal structure perspective drawing of the rod body (partially cut state) of the utility model.

[0018] Figure 4 It is the internal structure extension state perspective drawing of the rod body (partially cut state) of the utility model.

[0019] Figure 5 It is the limiting assembly connecting structure explosion drawing of the utility model.

[0020] The attached figures are labeled as follows: 1. Rod; 2. Mounting groove; 3. Mounting block; 4. Screw; 5. Cone; 6. Filler cavity; 7. Motor; 8. Threaded rod; 9. Movable sleeve rod; 10. Scraper; 11. Limiting assembly; 111. Annular groove; 112. Annular block; 113. Limiting block; 114. Vertical groove; 12. Upright rod; 13. Channel. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example: A self-tapping drill bit for expanding self-compacting piles, such as... Figures 1-2 As shown, the rod includes a rod body 1, with a mounting groove 2 at the top. A mounting block 3 is installed inside the mounting groove 2 by screws 4. The mounting block 3 is fixedly connected to the end of the output shaft of the auger drill. A pointed cone 5 is installed at the lower end of the rod body 1.

[0023] The rod body 1 has a filling chamber 6 inside, and a motor 7 is installed inside the rod body 1. A sealed chamber and a heat conduction channel can be installed outside the motor 7. The output shaft of the motor 7 is connected to the upper end of the threaded rod 8. The outer ring of the threaded rod 8 is threadedly connected to a movable sleeve rod 9. The end of the movable sleeve rod 9 is fixedly connected to the pointed cone 5. A scraper 10 is fixedly connected to the outer wall of the movable sleeve rod 9. The scraper 10 moves inside the filling chamber 6. The threaded rod 8 and the movable sleeve rod 9 are connected to each other through a limiting component 11 to prevent detachment.

[0024] like Figure 4 As shown, a vertical rod 12 is fixedly connected to the top of the pointed cone 5. The vertical rod 12 is movably connected to the groove 13 reserved inside the rod body 1. A ball bearing guide or wear-resistant bushing can be installed in the groove 13 to improve stability.

[0025] In some embodiments, the inner wall of the packing cavity 6 is in contact with the outer wall of the scraper 10 and slides up and down. The scraper 10 has an arc-shaped chamfer that matches the arc-shaped chamfer of the packing cavity 6. The scraper 10 has a rubber edge to enhance the fit, making the square scraper 10 clean the inside of the packing cavity 6 more smoothly and reducing cleaning dead corners. At the same time, the square packing cavity 6 limits the square scraper 10, so that the movable sleeve 9, which is threaded to the threaded rod 8, can only move vertically when the threaded rod 8 rotates. The rod body 1 and the movable sleeve 9 are made of high-strength alloy steel (such as 42CrMo), and the scraper 10 is made of wear-resistant polyurethane composite material.

[0026] The inside of the filler cavity 6 is provided with a feeding port below the initial position of the scraper 10, which can be referred to Figure 3 At this time, the bottom of the rod body 1 is in close connection with the pointed cone block 5. Specifically, the two sets of sealing rings arranged between the top end of the pointed cone body 5 and the bottom of the rod body 1 are in close contact, which ensures the sealing of the bottom of the rod body 1 and prevents the filler from being exposed due to vibration during drilling. After the filling is completed, the filler port is closed. During use, the rod body 1 is processed into a hole through the operation of the auger machine, and then the rod body 1 is lifted up. The motor 7 drives the threaded rod 8 to rotate, and the movable sleeve rod 9 connected with the threaded rod 8 moves in position under the restriction of the scraper 10 and the square filler cavity 6. At this time, the pointed cone body 5 moves synchronously with the movable sleeve rod 9 and generates a gap with the lower end of the rod body 1 (refer to Figure 4 ), the filler cavity 6 expands and the filler leaks and is injected into the hole. The expanded filler (such as expanded concrete) expands and compacts in the pile hole due to gravity and external soil pressure, forming a pile body. The scraper 10 moves up and down with the movable sleeve rod 9 to clean the filler adhered to the inner wall of the filler cavity 6, reducing the adhesion of the filler. After shutdown, the inside of the screw rod can be flushed with high-pressure water or compressed air for further cleaning. The cleaning of the scraper 10 during construction can reduce the difficulty of cleaning after shutdown and improve the cleaning effect.

[0027] As shown in Figure 5 , the limiting component 11 includes an annular groove 111 prearranged inside the lower end of the threaded rod 8, and the annular groove 111 is rotatably connected with an annular block 112 (which can be rotatably connected through a bearing). The inside of the movable sleeve rod 9 is prearranged with a threaded groove with an open top, and the threaded groove is threadedly connected with the threaded rod 8. There is a gap between the annular outer wall of the annular block 112 and the inner wall of the threaded groove prearranged in the movable sleeve rod 9, so that the threaded connection between the movable sleeve rod 9 and the threaded rod 8 is not affected. The outer wall of the annular block 112 is provided with two limiting blocks 113, which are symmetrically arranged about the central axis of the annular block 112. The inner wall of the movable sleeve rod 9 is provided with two symmetrical vertical grooves 114, and the limiting blocks 113 extend into the vertical grooves 114. The vertical grooves 114 are in communication with the threaded groove prearranged in the inside of the movable sleeve rod 9, and the lower end of the vertical groove 114 is flush with the lower end of the threaded groove. The upper end of the vertical groove 114 is closed. During use, the motor 7 drives the threaded rod 8 to rotate, and the threaded rod 8 moves up and down with the movable sleeve rod 9. The limiting blocks 113 move in the vertical grooves 114. The limiting blocks 113 and the vertical grooves 114 can be made of self-lubricating materials. When the top end of the vertical groove 114 abuts against the limiting block 113, there is no movement space between the threaded rod 8 and the movable sleeve rod 9, preventing the threaded rod 8 and the movable sleeve rod 9 from falling off.

[0028] The various embodiments in the specification are described in a related manner, and the same and similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments.

[0029] The above only describes the preferred embodiments of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application is included in the protection scope of the present application.

Claims

1. A self-tapping drill for expanding self-compact extruded piles, comprising a shaft (1), characterized in that: The top of the rod body (1) is provided with a mounting groove (2), the inside of the mounting groove (2) is provided with a mounting block (3) through a screw (4), the mounting block (3) is fixedly connected with the output shaft end of the auger, the lower end of the rod body (1) is provided with a sharp cone body (5), the inside of the rod body (1) is provided with a filler cavity (6), the inside of the rod body (1) is provided with a motor (7), the output shaft of the motor (7) is drivingly connected with a threaded rod (8), the outer ring of the threaded rod (8) is threadedly connected with a movable sleeve rod (9), the end of the movable sleeve rod (9) is fixedly connected with the sharp cone body (5), the outer wall of the movable sleeve rod (9) is fixedly connected with a scraper (10), the scraper (10) is movable in the filler cavity (6), the threaded rod (8) and the movable sleeve rod (9) are preventively connected through a limiting assembly (11).

2. The self-tapping drill for expanding self-consolidating pile according to claim 1, wherein: The inner wall of the filler cavity (6) is attached with the outer wall of the scraper (10) and can slide up and down, the scraper (10) has an arc chamfer which is matched with the arc chamfer of the filler cavity (6); the inside of the filler cavity (6) is provided with an inlet, the inlet is below the initial position of the scraper (10).

3. The self-tapping drill for expanding self-consolidating pile according to claim 1, wherein: The inside of the movable sleeve rod (9) is reserved with a threaded groove which is open at the top, the threaded groove is threadedly connected with the threaded rod (8).

4. The self-tapping drill for expanding self-consolidating pile according to claim 1, wherein: The limiting assembly (11) comprises an annular groove (111) which is pre-set in the inside of the threaded rod (8), the inside of the annular groove (111) is rotatably connected with an annular block (112), the gap exists between the outer ring annular outer wall of the annular block (112) and the inner wall of the threaded groove which is reserved in the inner ring of the movable sleeve rod (9).

5. The self-tapping drill for expanding self-consolidating pile according to claim 4, wherein: The limiting assembly (11) further comprises two limiting blocks (113) which are fixedly connected with the outer wall of the annular block (112), the two limiting blocks (113) are symmetrically arranged about the central axis of the annular block (112), the inner wall of the movable sleeve rod (9) is provided with two symmetric vertical grooves (114), the limiting blocks (113) extend into the vertical grooves (114), the vertical grooves (114) are communicated with the threaded groove which is reserved in the inside of the movable sleeve rod (9).

6. The self-tapping drill for expanding self-consolidating piles according to claim 5, characterized in that: The lower end of the vertical groove (114) is flush with the lower end of the threaded groove, the upper end of the vertical groove (114) is closed.

7. The self-tapping drill for expanding self-consolidating pile according to claim 1, wherein: The top of the sharp cone body (5) is fixedly connected with a vertical rod (12), the vertical rod (12) is movably connected with a groove (13) which is reserved in the inside of the rod body (1).

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