Single-shaft bidirectional cement mixing pile machine drill bit

Abstract

The utility model discloses a single-shaft two-way cement mixing pile machine drill bit which comprises a connecting sleeve, a drill bit body, a cutting edge and mixing blades, the lower portion of the connecting sleeve is in butt joint with the drill bit body, the connecting sleeve and the drill bit body are fastened and installed through a locking pin, the cutting edge is arranged at the bottom of the drill bit body, and the mixing blades are arranged on the drill bit body. Diamond blocks are arranged on the surfaces of the cutting edges, and a slurry outlet is formed in one side of the drill bit body. According to the single-shaft two-way cement mixing pile machine drill bit, the movable sleeve and the protective cover which are matched with each other are arranged on the outer sides of the locking pins at the joint of the connecting sleeve and the drill bit body, so that the multiple locking pins can be sealed, and the locking pins are prevented from being loosened due to continuous friction in the using process; the drill bit of the single-shaft bidirectional cement mixing pile machine is provided with the protective structure, and the assembled mixing blades can be limited through mutual cooperation of the butt joint block, the guide groove and the guide seat, so that the mixing blades can be conveniently limited and assembled.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling rig bits, in particular to a single-shaft bidirectional cement mixing pile machine drill bit. Background Art

[0002] The single-axis bidirectional cement mixing pile drilling rig is a foundation construction equipment specially used in civil engineering. It is mainly used to mix soil and concrete to form pile foundations or walls, which are used to support and reinforce soil structures. The drill bit of the single-axis bidirectional cement mixing pile rig is a very important component. The drill bit rotates during the construction process to fully mix the surrounding soil and cement slurry to form concrete piles.

[0003] When the single-axis bidirectional cement mixing pile machine drill bits currently on the market are used, the drill bit body and the connecting sleeve are locked and installed by means of locking pins. After the existing single-axis bidirectional cement mixing pile machine drill bits are installed, the locking pins are exposed to the outside. The exposed locking pins will become loose due to constant friction when the drill bit is operating. Therefore, improvements should be proposed to the current single-axis bidirectional cement mixing pile machine drill bits. Utility Model Content

[0004] The utility model aims to provide a single-axis bidirectional cement mixing pile machine drill bit to solve the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a single-axis bidirectional cement mixing pile machine drill bit, comprising a connecting sleeve, a drill bit body, a cutting edge and a stirring blade, the drill bit body is butt-jointed below the connecting sleeve, and the connecting sleeve and the drill bit body are fastened and installed by a locking pin, a cutting edge is arranged at the bottom of the drill bit body, and a diamond block is arranged on the surface of the cutting edge, a slurry outlet is opened on one side of the drill bit body, a mounting seat is arranged above the drill bit body near the slurry outlet, and stirring blades are arranged on both sides of the mounting seat.

[0006] Preferably, the locking pins are evenly arranged circumferentially, and adjacent locking pins are spaced at a preset angle.

[0007] Preferably, a fixing sleeve is provided above the drill bit body near the slurry outlet, and a limiting groove is provided on the inner wall of the fixing sleeve, and the inside of the limiting groove is connected to the limiting block.

[0008] Preferably, the limiting groove is a dovetail groove structure.

[0009] Preferably, a movable sleeve is inserted into the inner side of the fixed sleeve, and the outer wall of the movable sleeve is connected to the outer end of the limiting block, and a guide rod passes through the middle of the limiting block.

[0010] Preferably, a spring is sleeved on the outer side of the guide rod, and two ends of the spring are respectively connected to the limit block and the inner wall of the limit groove.

[0011] Preferably, a protective cover is provided on the upper outer side of the movable sleeve, and the protective cover is connected to the connecting sleeve, and a fastening pin connected to the movable sleeve penetrates the outer side of the protective cover.

[0012] Preferably, guide grooves are provided on both sides of the mounting seat, one end of the stirring blade is connected to the guide seat, and the guide seat is inserted into the guide groove.

[0013] Preferably, a docking block is inserted inside the guide seat, and an elastic sheet is commonly connected between the docking block and the guide seat, and a docking groove is formed on the inner side of the mounting seat close to the guide groove.

[0014] Preferably, a docking groove is provided on the inner side of the mounting seat close to the guide groove.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: the single-axis bidirectional cement mixing pile machine drill bit can seal multiple locking pins by arranging mutually matching movable sleeves and protective covers on the outer side of the locking pin at the connection between the connecting sleeve and the drill bit body, thereby preventing the locking pins from loosening due to continuous friction during use, so that the single-axis bidirectional cement mixing pile machine drill bit has a protective structure, and the assembled mixing blades can be limited by the mutual cooperation between the docking block and the guide groove and the guide seat, which is convenient for the limited assembly of the mixing blades.

[0016] 1. The drill bit of the single-axis bidirectional cement mixing pile machine first pushes the movable sleeve downward to the limit position, at which time the positions of the movable sleeve and the fixed sleeve overlap, then the locking pin is passed through the connecting sleeve and the drill bit body and tightened by a tool, then the movable sleeve pushed downward is loosened and automatically reset upward to the initial position, and finally the fastening pin is passed through the outside of the protective cover and connected and tightened with the movable sleeve. By arranging the outer side of the locking pin at the connection between the connecting sleeve and the drill bit body with a matching movable sleeve and a protective cover, multiple locking pins can be sealed to prevent the locking pin from being loosened due to continuous friction during use, so that the drill bit of the single-axis bidirectional cement mixing pile machine has a protective structure;

[0017] 2. The single-axis bidirectional cement mixing pile machine drill bit first docks the guide seat at one end of the mixing blade with the upper part of the guide groove on the mounting seat and pushes the mixing blade downward. As the mixing blade moves downward, the inner wall of the guide groove will squeeze the docking block inserted on the inner side of the guide seat until the mixing blade is pushed down to the limit position, and then the bolt is passed through the mounting seat and the guide seat to lock them. The assembled mixing blade can be limited by the mutual cooperation between the automatically reset docking block and the guide groove and the guide seat, thereby facilitating the limited assembly of the mixing blade on the single-axis bidirectional cement mixing pile machine drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the combined structure of the fixed sleeve and the movable sleeve of the utility model;

[0020] Figure 3 This is a schematic diagram of the combined structure of the fixed sleeve, the movable sleeve and the protective cover of the utility model;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the mounting seat of the utility model viewed from above;

[0022] Figure 5 This is a schematic diagram of the main cutaway structure of the mounting base of the utility model.

[0023] In the figure: 1. connecting sleeve; 2. drill body; 3. locking pin; 4. cutting blade; 5. diamond block; 6. slurry outlet; 7. mounting seat; 8. stirring blade; 9. fixing sleeve; 10. limiting groove; 11. limiting block; 12. movable sleeve; 13. guide rod; 14. spring; 15. protective cover; 16. fastening pin; 17. guide groove; 18. guide seat; 19. docking block; 20. elastic sheet; 21. docking groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 , Figure 2 and Figure 3The utility model provides a technical solution: a single-axis bidirectional cement mixing pile machine drill bit, comprising a connecting sleeve 1, a drill bit body 2, a cutting edge 4 and a mixing blade 8, the drill bit body 2 is butt-jointed below the connecting sleeve 1, and the connecting sleeve 1 and the drill bit body 2 are fastened and installed by a locking pin 3, a cutting edge 4 is arranged at the bottom of the drill bit body 2, and a diamond block 5 is arranged on the surface of the cutting edge 4, a slurry outlet 6 is opened on one side of the drill bit body 2, a mounting seat 7 is arranged above the drill bit body 2 near the slurry outlet 6, and mixing blades 8 are arranged on both sides of the mounting seat 7.

[0026] A fixed sleeve 9 is arranged above the drill body 2 near the slurry outlet 6, specifically above the mounting seat 7. The fixed sleeve 9 is fixedly connected to the drill body 2, and a limiting groove 10 is provided on the inner wall of the fixed sleeve 9, and the inner part of the limiting groove 10 is connected to the limiting block 11; a movable sleeve 12 is inserted into the inner side of the fixed sleeve 9, and the outer wall of the movable sleeve 12 is connected to the outer end of the limiting block 11, specifically a fixed connection. A guide rod 13 runs through the middle of the limiting block 11; a spring 14 is sleeved on the outer side of the guide rod 13, and the two ends of the spring 14 are respectively connected to the limiting block 11 and the inner wall of the limiting groove 10, specifically the inner bottom wall; a protective cover 15 is sleeved on the upper outer side of the movable sleeve 12, and the protective cover 15 is connected to the connecting sleeve 1, specifically a fixed connection, such as seamless welding. A fastening pin 16 connected to the movable sleeve 12 runs through the outer side of the protective cover 15. The limit grooves 10 are set at equal angles. The cross-sectional dimensions of the limit block 11 match the cross-sectional dimensions of the limit grooves 10. The limit block 11 forms a telescopic structure between the spring 14 and the limit grooves 10. The outer wall of the movable sleeve 12 fits with the inner walls of the fixed sleeve 9 and the protective cover 15.

[0027] During specific implementation, the movable sleeve 12 and the fixed sleeve 9 are misaligned in the initial state, that is, they are misaligned along the axial direction of the connecting sleeve 1. When the connecting sleeve 1 and the drill body 2 need to be assembled, the movable sleeve 12 is first pushed downward, and the movable sleeve 12 pushed downward drives the connected limit block 11 to move downward along the guide rod 13 inside the limit groove 10, and the downward-moving limit block 11 squeezes the spring 14 sleeved on the outside of the guide rod 13 until the movable sleeve 12 is pushed to the limit position. At this time, the positions of the movable sleeve 12 and the fixed sleeve 9 overlap, that is, the movable sleeve 12 is accommodated in the fixed sleeve 9, thereby freeing up the operating space for connecting the connecting sleeve 1 and the drill body 2, and then the locking pin 3 is passed through the connecting sleeve 1 and the drill body 2 and tightened by a tool. After completing the fastening installation of the connecting sleeve 1 and the drill bit body 2, the movable sleeve 12 pushed downward is loosened. The loosened movable sleeve 12 can automatically reset to the initial position upward by the elastic force of the spring 14. At this time, the upper edge of the movable sleeve 12 is inside the protective cover 15. Finally, the fastening pin 16 passes through the outside of the protective cover 15 and is connected and tightened with the movable sleeve 12. By arranging the outer side of the locking pin 3 at the connection between the connecting sleeve 1 and the drill bit body 2 with the matching movable sleeve 12 and the protective cover 15, multiple locking pins 3 can be sealed to prevent the locking pin 3 from loosening during use, so that the single-axis bidirectional cement mixing pile machine drill bit has a protective structure.

[0028] See also Figure 1 , Figure 4 and Figure 5 Guide grooves 17 are provided on both sides of the mounting seat 7, one end of the stirring blade 8 is connected to a guide seat 18, and the guide seat 18 is inserted into the guide groove 17; a docking block 19 is inserted into the guide seat 18, and an elastic sheet 20 is connected between the docking block 19 and the guide seat 18, a docking groove 21 is provided on the inner side of the mounting seat 7 close to the guide groove 17, the cross-sectional size of the guide seat 18 matches the cross-sectional size of the guide groove 17, and the docking block 19 forms a telescopic structure between the elastic sheet 20 and the guide seat 18.

[0029] When the mixing blade 8 is assembled, the guide seat 18 at one end of the mixing blade 8 is first connected to the top of the guide groove 17 on the mounting seat 7, and the mixing blade 8 is pushed downward. As the mixing blade 8 moves downward, the inner wall of the guide groove 17 will squeeze the docking block 19 inserted on the inner side of the guide seat 18. The docking block 19 squeezed by the external force squeezes the elastic sheet 20 and moves toward the inside of the guide seat 18 until the mixing blade 8 is pushed down to the limit position, so that the position of the docking block 19 corresponds to the position of the docking groove 21. At this time, the docking block 19 that is not squeezed by the external force can be automatically reset outward and inserted into the inside of the docking groove 21 by the elastic force of the elastic sheet 20, and then the bolt is passed through the mounting seat 7 and the guide seat 18 for locking. The assembled mixing blade 8 can be limited by the mutual cooperation between the automatically reset docking block 19 and the guide groove 17 and the guide seat 18, thereby facilitating the limited assembly of the mixing blade 8 on the drill bit of the single-axis bidirectional cement mixing pile machine.

[0030] To sum up, when using the single-axis bidirectional cement mixing pile drill bit, after the connecting sleeve 1 and the drill bit body 2 are tightened and installed through the locking pin 3, the connecting sleeve 1 is assembled with the single-axis bidirectional cement mixing pile drilling rig, and then the drilling rig is started to drive the connecting sleeve 1 and the drill bit body 2 to rotate synchronously and move the drill bit body 2 downward. At this time, the drill bit body 2 pushes the ground through the cutting blade 4 and the diamond block 5 at the bottom, and the cement slurry is discharged from the slurry outlet 6 through the connecting sleeve 1. At the same time, when the drill bit body 2 rotates, it drives the mixing blade 8 to stir the slurry, so that the surrounding soil and cement slurry are fully mixed to form a concrete pile. The contents not described in detail in this description belong to the existing technology known to professional and technical personnel in this field.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A single-axis bidirectional cement mixing pile driver drill bit, characterized in that: It comprises a connecting sleeve (1), a drill body (2), a cutting blade (4) and a stirring blade (8); wherein: A drill bit body (2) is butt-jointed at the bottom of the connecting sleeve (1), and the connecting sleeve (1) and the drill bit body (2) are fastened and installed via a locking pin (3); a cutting blade (4) is arranged at the bottom of the drill bit body (2), and a diamond block (5) is arranged on the surface of the cutting blade (4); a slurry outlet (6) is opened at one side of the drill bit body (2); a mounting seat (7) is arranged above the drill bit body (2) near the slurry outlet (6), and stirring blades (8) are arranged on both sides of the mounting seat (7).

2. A single-axis bidirectional cement mixing pile driver drill bit according to claim 1, characterized in that: The locking pins (3) are evenly arranged in the circumferential direction, and adjacent locking pins (3) are spaced at a preset angle.

3. The uniaxial bidirectional cement mixing pile driver drill bit according to claim 1, characterized in that: A fixing sleeve (9) is arranged above the drill bit body (2) near the slurry outlet (6), and a limiting groove (10) is provided on the inner wall of the fixing sleeve (9), and the inner part of the limiting groove (10) is connected to a limiting block (11).

4. A single-axis bidirectional cement mixing pile driver drill bit according to claim 3, characterized in that: The limiting groove (10) is a dovetail groove structure.

5. The uniaxial bidirectional cement mixing pile driver drill bit according to claim 3, characterized in that: A movable sleeve (12) is inserted into the inner side of the fixed sleeve (9), and the outer wall of the movable sleeve (12) is connected to the outer end of the limit block (11), and a guide rod (13) passes through the middle of the limit block (11).

6. A single-axis bidirectional cement mixing pile driver drill bit according to claim 5, characterized in that: A spring (14) is sleeved on the outer side of the guide rod (13), and two ends of the spring (14) are respectively connected to the limit block (11) and the inner wall of the limit groove (10).

7. A single-axis bidirectional cement mixing pile driver drill bit according to claim 6, characterized in that: A protective cover (15) is provided on the upper outer side of the movable sleeve (12), and the protective cover (15) is connected to the connecting sleeve (1). A fastening pin (16) connected to the movable sleeve (12) penetrates the outer side of the protective cover (15).

8. The single-axis bidirectional cement mixing pile driver drill bit according to claim 1, characterized in that: Guide grooves (17) are provided on both sides of the mounting seat (7); one end of the stirring blade (8) is connected to a guide seat (18), and the guide seat (18) is inserted into the guide groove (17).

9. The single-axis bidirectional cement mixing pile driver drill bit according to claim 8, characterized in that: A docking block (19) is inserted into the guide seat (18), and an elastic sheet (20) is commonly connected between the docking block (19) and the guide seat (18).

10. The single-axis bidirectional cement mixing pile driver drill bit according to claim 9, characterized in that: The mounting seat (7) is provided with a docking groove (21) on the inner side close to the guide groove (17).

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