Deep foundation pit pile foundation construction drilling device

Abstract

The invention relates to the technical field of foundation pit pile foundation construction, and discloses a deep foundation pit pile foundation construction drilling device which comprises a transport vehicle, and the transport vehicle is connected with a connecting mechanism through a lifting mechanism; the connecting mechanism comprises a second driving part, a first connecting part is fixedly installed on an output shaft of the second driving part, the second driving part drives the first connecting part to rotate along the axis of the output shaft of the second driving part, a cavity is formed in the first connecting part, and when the first driving part drives the drill bit to continue to descend, the second driving part drives the drill bit to descend. The drill bit cannot drill in due to the existence of rock, a piston block on a second connecting piece can extrude a cavity and a first spring for buffering so as to achieve the effect of preliminarily protecting the drill bit, a first tooth block and a second tooth block can be gradually separated along with continuous descending of a first connecting piece, and after the first tooth block and the second tooth block are separated, the first tooth block is separated from the second tooth block. And the first connecting piece idles and cannot continuously drive the second connecting piece to rotate, so that the drill bit does not rub with the rock any more, and the effect of protecting the drill bit is further achieved.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit pile foundation construction, and more specifically, to a drilling device for deep foundation pit pile foundation construction. Background Art

[0002] The foundation pit is an earth pit excavated at the foundation design location according to the base elevation and foundation plane dimensions. As the basic area for underground engineering construction, it is excavated on the ground. Its main purpose is to provide space for the foundation of the building.

[0003] Pile foundation is a ground treatment method that inserts reinforced concrete columns into the soil to enhance the bearing capacity of the foundation. Pile foundation consists of foundation piles and a cap connected to the top of the pile. If the pile body is completely buried in the soil and the bottom of the cap is in contact with the soil, it is called a low cap pile foundation; if the upper part of the pile body is exposed to the ground and the bottom of the cap is above the ground, it is called a high cap pile foundation. Building pile foundations are usually low cap pile foundations, which are widely used in high-rise buildings, bridges, high-speed railways and other projects.

[0004] A drilling device is required for pile foundation construction. The drill bit of the existing drilling device is prone to damage during long-term or high-frequency use. In particular, when the drill bit comes into contact with the rock during uniform drilling, the hard nature of the rock makes it difficult for the drill bit to continue to penetrate deeper, which accelerates the wear of the drill bit and even causes the drill bit to be damaged prematurely. This not only increases the frequency of drill bit replacement, but also increases the drilling cost. Summary of the invention

[0005] The present invention provides a deep foundation pit pile foundation construction drilling device, which solves the technical problem that the drill bit of the existing drilling device is easily damaged during long-term or high-frequency use, especially when the drill bit contacts the rock during the uniform speed drilling process, the hard nature of the rock will make it difficult for the drill bit to continue to penetrate deeper and accelerate the wear of the drill bit, and even cause the drill bit to be damaged prematurely, which not only increases the replacement frequency of the drill bit, but also increases the drilling cost.

[0006] The present invention provides a deep foundation pit pile foundation construction drilling device, comprising a transport vehicle, wherein the transport vehicle is connected to a connecting mechanism via a lifting mechanism; The connecting mechanism includes a second driving member, a first connecting member is fixedly mounted on the output shaft of the second driving member, the second driving member drives the first connecting member to rotate along the axis of its output shaft, a cavity is opened on the first connecting member, a second connecting member is slidably mounted in the cavity and is limited by a positioning assembly, the second connecting member is used to connect a drill rod or a drill bit, a piston block is arranged on the second connecting member, a first spring is fixedly mounted on the inner top wall of the cavity, the first spring is abutted against the piston block, the lifting mechanism drives the drill bit downward at a uniform speed, the drill bit contacts the rock, drives the second connecting member to move in the cavity, and cooperates with the air in the cavity and the first spring to buffer the drill bit.

[0007] As a further optimization solution of the present invention, the positioning assembly includes a slide cylinder slidably installed in the cavity, a first tooth block is fixed on the slide cylinder, and a second tooth block meshing with the first tooth block is fixedly installed on the second connecting member.

[0008] As a further optimization solution of the present invention, a plurality of through holes are provided on the first connecting member, and bolts threadedly connected to the second connecting member are arranged in the through holes.

[0009] As a further optimization scheme of the present invention, a slide groove is provided on the first tooth block, a clamping block is slidably installed in the slide groove, one end of the second spring is connected to the clamping block, and the other end of the second spring is fixedly connected to the inner wall of the slide groove.

[0010] As a further optimization solution of the present invention, a plurality of grooves are provided on the first tooth block, and balls are movably installed in the grooves.

[0011] As a further optimization solution of the present invention, the lifting mechanism includes a mounting frame fixedly mounted on the transport vehicle, and a lifting block driven by the first driving member to move radially on the mounting frame is slidably mounted on the mounting frame.

[0012] As a further optimization scheme of the present invention, an alarm component is provided on the first connecting member, a plurality of air holes connected to the cavity are opened on the first connecting member, a whistle is provided in each of the air holes, an annular groove is opened in the cavity, a sealing ring for sealing the air hole is slidably installed in the annular groove, and the inner diameter of the sealing ring is larger than the outer diameter of the piston block.

[0013] As a further optimization scheme of the present invention, an anti-seepage component is provided on the second tooth block, and the anti-seepage component includes a positioning rod fixedly mounted on the second tooth block, an anti-seepage ring is slidably mounted on the positioning rod, the anti-seepage ring is slidably connected to the second connecting member, one end of a third spring is connected to the anti-seepage ring, and the other end of the third spring is fixedly connected to the second tooth block.

[0014] As a further optimization solution of the present invention, a mounting groove is provided on the anti-seepage ring, and water-swellable glue is arranged in the mounting groove.

[0015] As a further optimization scheme of the present invention, an annular hole is opened in the anti-seepage ring, an air inlet channel connected to the annular hole is opened on the anti-seepage ring, and an air outlet channel connected to the annular hole is opened on the anti-seepage ring.

[0016] The beneficial effects of the present invention are: 1. In the present invention, when the first driving member drives the drill bit to continue to descend, the presence of the rock makes it impossible for the drill bit to drill, and the piston block on the second connecting member will squeeze the cavity and the first spring for buffering, so as to achieve the effect of preliminary protection of the drill bit.

[0017] 2. In the present invention, as the first connecting member continues to descend, the first tooth block and the second tooth block will gradually separate. After the first tooth block and the second tooth block are separated, the first connecting member will idle and cannot continue to drive the second connecting member to rotate, so that the drill bit will no longer rub against the rock, thereby further achieving the effect of protecting the drill bit.

[0018] 3. In order to prevent the first tooth block and the second tooth block from re-engaging when the drill bit is withdrawn from the pile foundation hole, the first spring will drive the second connecting rod to quickly reset, causing secondary damage to the drill bit due to collision with the rock, and the second spring will drive the blocking block to move in the slide groove and block the gap between the first tooth blocks, preventing the second tooth block from resetting and re-engaging with the first tooth block. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic structural diagram of the second driving member of the present invention; Figure 3 It is a structural schematic diagram of the connection mechanism of the present invention; Figure 4 It is a structural schematic diagram of the blocking ring of the present invention; Figure 5 It is a schematic diagram of the structure of the slide cylinder of the present invention; Figure 6 is a schematic structural diagram of a second connecting member of the present invention; Figure 7 is a schematic structural diagram of the first gear block of the present invention; Figure 8 It is a structural schematic diagram of the card block of the present invention; Fig. 9 It is a structural schematic diagram of the anti-seepage ring of the present invention.

[0020] In the figure: 10. Transport vehicle; 20. lifting mechanism; 21. mounting frame; 22. lifting block; 23. first driving member; 30. Connecting mechanism; 31. Second driving member; 32. First connecting member; 33. Cavity; 34. Second connecting member; 35. First spring; 40. Clamping assembly; 41. Slide; 42. First tooth block; 43. Second tooth block; 44. Bolt; 45. Slide; 46. Clamping block; 47. Second spring; 48. Ball; 49. Piston block; 50. Alarm assembly; 51. Air hole; 52. Whistle; 53. Blocking ring; 54. Annular groove; 60. Anti-seepage component; 61. Positioning rod; 62. Anti-seepage ring; 63. Third spring; 64. Mounting groove; 65. Water-swellable glue; 66. Annular hole; 67. Air inlet channel; 68. Air outlet channel. DETAILED DESCRIPTION

[0021] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0022] like Figures 1 to 6 As shown, a deep foundation pit pile foundation construction drilling device includes a transport vehicle 10, and a connecting mechanism 30 is connected to the transport vehicle 10 through a lifting mechanism 20; The connecting mechanism 30 includes a second driving member 31, on the output shaft of which a first connecting member 32 is fixedly mounted, the second driving member 31 drives the first connecting member 32 to rotate along the axis of its output shaft, a cavity 33 is provided on the first connecting member 32, a second connecting member 34 is slidably mounted in the cavity 33 and is limited in position in cooperation with a positioning assembly 40, the second connecting member 34 is used to connect a drill rod or a drill bit, a piston block 49 is provided on the second connecting member 34, a first spring 35 is fixedly mounted on the inner top wall of the cavity 33, the first spring 35 is abutted against the piston block 49, the lifting mechanism 20 drives the drill bit downward at a uniform speed, the drill bit contacts the rock, drives the second connecting member 34 to move in the cavity 33, and cooperates with the air in the cavity 33 and the first spring 35 to buffer the drill bit.

[0023] The positioning assembly 40 includes a slide cylinder 41 slidably mounted in the cavity 33 , a first tooth block 42 is fixed on the slide cylinder 41 , and a second tooth block 43 meshing with the first tooth block 42 is fixedly mounted on the second connecting member 34 .

[0024] The first connecting member 32 is provided with a plurality of through holes, each of which is provided with a bolt 44 threadedly connected to the second connecting member 34 ; the bolt 44 is used for quickly installing or removing the slide 41 for easy maintenance.

[0025] The lifting mechanism 20 includes a mounting frame 21 fixedly mounted on the transport vehicle 10 , and a lifting block 22 is slidably mounted on the mounting frame 21 and is driven by a first driving member 23 to move radially on the mounting frame 21 .

[0026] When drilling a hole in pile foundation construction, the present invention connects the drill bit or the drill rod with the drill bit installed to the second connecting member 34, then starts the first driving member 23 to drive the lifting block 22 to descend on the mounting frame 21, and the lifting block 22 descends with the second driving member 31, the first connecting member 32 and the second connecting member 34, and during the descent, the second driving member 31 drives the first connecting member 32 to rotate, and the first connecting member 32 drives the second connecting member 34 and the drill bit or drill rod installed thereon to rotate under the engagement of the first tooth block 42 and the second tooth block 43, and the drilling process is performed after the drill bit contacts the ground (the cavity 33 and the first spring 35 can provide sufficient pressure to enable the drill bit to drill through the soil); Since the underground rocks are difficult to be observed by personnel, as the drill bit continues to go deeper, the drill bit is easy to contact the rocks. When the drill bit touches the rocks, it is difficult to continue to descend. At this time, if the drill bit continues to drill into the rocks, it will cause irreversible damage to the drill bit. Therefore, when the first driving member 23 drives the drill bit to continue to descend, the presence of the rocks makes it impossible for the drill bit to drill. The piston block 49 on the second connecting member 34 will squeeze the cavity 33 and the first spring 35 for buffering, so as to achieve the effect of preliminary protection of the drill bit, and as the first connecting member 32 continues to descend, the first tooth block 42 and the second tooth block 43 will gradually separate. After the first tooth block 42 and the second tooth block 43 are separated, the first connecting member 32 is idling and cannot continue to drive the second connecting member 34 to rotate, so that the drill bit no longer rubs against the rock, thereby further achieving the effect of protecting the drill bit.

[0027] like Figure 8 As shown, a slide groove 45 is formed on the first tooth block 42, a clamping block 46 is slidably installed in the slide groove 45, one end of a second spring 47 is connected to the clamping block 46, and the other end of the second spring 47 is fixedly connected to the inner wall of the slide groove 45; In order to prevent the first tooth block 42 and the second tooth block 43 from re-engaging when the drill bit is withdrawn from the pile foundation hole, the first spring 35 will drive the second connecting rod to quickly reset, causing secondary damage to the drill bit by collision with the rock, and the second spring 47 will drive the blocking block 46 to move in the slide groove 45 and block the gap between the first tooth blocks 42 to prevent the second tooth block 43 from resetting and re-engaging with the first tooth block 42. After the drill bit is withdrawn from the pile foundation hole for inspection, the slide cylinder 41 is disassembled to reset the blocking block 46 so that the first tooth block 42 and the second tooth block 43 are re-engaged.

[0028] like Figure 7 As shown, a plurality of grooves are formed on the first tooth block 42 , and balls 48 are movably installed in the grooves. The arrangement of the balls 48 can facilitate the separation of the first tooth block 42 and the second tooth block 43 .

[0029] like Figure 3 As shown, the first connecting member 32 is provided with an alarm component 50, the first connecting member 32 is provided with a plurality of air holes 51 communicating with the cavity 33, each of the air holes 51 is provided with a whistle 52, the cavity 33 is provided with an annular groove 54, a blocking ring 53 for blocking the air hole 51 is slidably installed in the annular groove 54, and the inner diameter of the blocking ring 53 is larger than the outer diameter of the piston block 49; When an abnormality occurs in the drill bit, in order to warn the workers on the construction site, the piston block 49 will contact the sealing ring 53 during the separation of the first tooth block 42 and the second tooth block 43, and drive the sealing ring 53 to release the blockage of the air hole 51 after the separation of the first tooth block 42 and the second tooth block 43, and then the gas in the cavity 33 will be discharged along the air hole 51. The airflow passing through the air hole 51 will make the whistle 52 sound, reminding the on-site workers that the working state of the drill bit is abnormal so that the drill bit can be inspected and repaired in time.

[0030] like Fig. 9 As shown, the second tooth block 43 is provided with an anti-seepage component 60, and the anti-seepage component 60 includes a positioning rod 61 fixedly mounted on the second tooth block 43, an anti-seepage ring 62 is slidably mounted on the positioning rod 61, and the anti-seepage ring 62 is slidably connected to the second connecting member 34, and one end of a third spring 63 is connected to the anti-seepage ring 62, and the other end of the third spring 63 is fixedly connected to the second tooth block 43; In order to prevent the wall protection slurry from penetrating into the cavity 33 and affecting the normal use of its internal components, when the first connecting member 32 slides in the cavity 33, the third spring 63 can make the anti-seepage ring 62 abut against the lower end of the first connecting member 32, thereby preventing the wall protection slurry from entering the cavity 33.

[0031] The anti-seepage ring 62 is provided with an installation groove 64, and a water-swellable glue 65 is arranged in the installation groove 64; when slurry enters the gap between the anti-seepage ring 62 and the first connecting member 32, the water-swellable glue 65 absorbs moisture and expands, thereby further improving the sealing between the anti-seepage ring 62 and the first connecting member 32, and further preventing slurry from entering the cavity 33.

[0032] An annular hole 66 is provided in the anti-seepage ring 62, an air inlet channel 67 connected to the annular hole 66 is provided on the anti-seepage ring 62, and an air outlet channel 68 connected to the annular hole 66 is provided on the anti-seepage ring 62; high-temperature gas can be input into the annular hole 66 along the air inlet channel 67 to heat the anti-seepage ring 62, so that the water-swellable glue 65 can be dehydrated and shrunk, and the water-swellable glue 65 can be reused.

[0033] Working principle: Connect the drill bit or the drill rod with the drill bit installed with the second connecting member 34, then start the first driving member 23 to drive the lifting block 22 to descend on the mounting frame 21, and the lifting block 22 descends with the second driving member 31, the first connecting member 32 and the second connecting member 34, and during the descent, the second driving member 31 drives the first connecting member 32 to rotate, and the first connecting member 32 drives the second connecting member 34 and the drill bit or drill rod installed thereon to rotate under the engagement of the first tooth block 42 and the second tooth block 43, and the drill bit contacts the ground. After the drilling process is carried out, when the first driving member 23 drives the drill bit to continue to descend, if the drill bit cannot drill due to the presence of the rock, the piston block 49 on the second connecting member 34 will squeeze the cavity 33 and the first spring 35 for buffering, and as the first connecting member 32 continues to descend, the first tooth block 42 and the second tooth block 43 will gradually separate. After the first tooth block 42 and the second tooth block 43 are separated, the first connecting member 32 will idle and cannot continue to drive the second connecting member 34 to rotate, so that the drill bit no longer rubs against the rock. At the same time, the second spring 47 will bring The movable block 46 moves in the slide groove 45 and blocks the gap between the first tooth block 42 to prevent the second tooth block 43 from resetting and re-engaging with the first tooth block 42. After the drill bit is withdrawn from the pile foundation hole for inspection, the slide cylinder 41 is disassembled to reset the block 46 so that the first tooth block 42 and the second tooth block 43 are re-engaged. When the drill bit is abnormal, in order to warn the staff on the construction site, the piston block 49 will contact the blocking ring 53 during the separation of the first tooth block 42 and the second tooth block 43, and drive the blocking ring after the separation of the first tooth block 42 and the second tooth block 43. 53 releases the blockage of the air hole 51, and then the gas in the cavity 33 is discharged along the air hole 51. The air flow passing through the air hole 51 will make the whistle 52 make a sound. When the first connecting piece 32 slides in the cavity 33, the third spring 63 can make the anti-seepage ring 62 abut against the lower end of the first connecting piece 32, so as to prevent the wall protection slurry from entering the cavity 33. High-temperature gas is input into the annular hole 66 along the air inlet channel 67 to heat the anti-seepage ring 62, so that the water-swellable glue 65 is dehydrated and shrunk, so that the water-swellable glue 65 can be reused.

[0034] The above describes an embodiment of the present invention, but this embodiment is not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Under the guidance of this embodiment, ordinary technicians in this field can also make many forms, all of which are protected by this embodiment.

Claims

1. A deep foundation pit pile foundation construction drilling device, comprising a transport vehicle (10), characterized in that: The transport vehicle (10) is connected to a connecting mechanism (30) via a lifting mechanism (20); The connecting mechanism (30) comprises a second driving member (31), a first connecting member (32) being fixedly mounted on an output shaft of the second driving member (31), the second driving member (31) driving the first connecting member (32) to rotate along the axis of the output shaft thereof, a cavity (33) being provided on the first connecting member (32), a second connecting member (34) being slidably mounted in the cavity (33) and being limited in position by cooperating with a positioning assembly (40), the second connecting member (34) being used to connect a drill rod or a drill bit, a piston block (49) being provided on the second connecting member (34), a first spring (35) being fixedly mounted on an inner top wall of the cavity (33), the first spring (35) being abutted against the piston block (49), the lifting mechanism (20) driving the drill bit downward at a uniform speed, the drill bit being in contact with the rock, driving the second connecting member (34) to move in the cavity (33), and cooperating with the air in the cavity (33) and the first spring (35) to buffer the drill bit; The positioning assembly (40) comprises a slide cylinder (41) slidably mounted in the cavity (33), a first tooth block (42) being fixed on the slide cylinder (41), and a second tooth block (43) meshing with the first tooth block (42) being fixedly mounted on the second connecting member (34).

2. A deep foundation pit pile foundation construction drilling device according to claim 1, characterized in that: The first connecting member (32) is provided with a plurality of through holes, each of which is provided with a bolt (44) threadedly connected to the second connecting member (34).

3. A deep foundation pit pile foundation construction drilling device according to claim 2, characterized in that: The first tooth block (42) is provided with a slide groove (45), a clamping block (46) is slidably mounted in the slide groove (45), one end of a second spring (47) is connected to the clamping block (46), and the other end of the second spring (47) is fixedly connected to the inner wall of the slide groove (45).

4. A deep foundation pit pile foundation construction drilling device according to claim 3, characterized in that: The first tooth block (42) is provided with a plurality of grooves, in which balls (48) are movably mounted.

5. A deep foundation pit pile foundation construction drilling device according to claim 4, characterized in that: The lifting mechanism (20) comprises a mounting frame (21) fixedly mounted on the transport vehicle (10), and a lifting block (22) is slidably mounted on the mounting frame (21) and is driven by a first driving member (23) to move radially on the mounting frame (21).

6. A deep foundation pit pile foundation construction drilling device according to claim 5, characterized in that: The first connecting member (32) is provided with an alarm component (50), the first connecting member (32) is provided with a plurality of air holes (51) in communication with the cavity (33), each of the air holes (51) is provided with a whistle (52), the cavity (33) is provided with an annular groove (54), a sealing ring (53) for sealing the air hole (51) is slidably mounted in the annular groove (54), and the inner diameter of the sealing ring (53) is greater than the outer diameter of the piston block (49).

7. A deep foundation pit pile foundation construction drilling device according to claim 6, characterized in that: The second tooth block (43) is provided with an anti-seepage component (60), the anti-seepage component (60) comprising a positioning rod (61) fixedly mounted on the second tooth block (43), an anti-seepage ring (62) slidably mounted on the positioning rod (61), the anti-seepage ring (62) being slidably connected to the second connecting member (34), one end of a third spring (63) being connected to the anti-seepage ring (62), the other end of the third spring (63) being fixedly connected to the second tooth block (43).

8. A deep foundation pit pile foundation construction drilling device according to claim 7, characterized in that: The anti-seepage ring (62) is provided with a mounting groove (64), and water-swellable glue (65) is arranged in the mounting groove (64).

9. A deep foundation pit pile foundation construction drilling device according to claim 8, characterized in that: An annular hole (66) is provided in the anti-seepage ring (62), an air inlet channel (67) communicating with the annular hole (66) is provided on the anti-seepage ring (62), and an air outlet channel (68) communicating with the annular hole (66) is provided on the anti-seepage ring (62).

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