A drilling device for pile foundation construction in deep foundation pits

Abstract

The present invention relates to the technical field of foundation pit pile foundation construction, and discloses a drilling device for deep foundation pit pile foundation construction, including a transport vehicle, on which a connection mechanism is connected through a lifting mechanism; the connection mechanism includes a second driving member, and a first connecting member is fixedly installed 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 formed on the first connecting member. When the first driving member drives the drill bit to continue descending, the presence of rocks makes it impossible for the drill bit to penetrate. Then, the piston block on the second connecting member will squeeze the cavity and the first spring for buffering to achieve the effect of initially protecting the drill bit. And 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 rotates idly and cannot continue to drive the second connecting member to rotate, so that the drill bit no longer rubs against the rocks, thereby further achieving the effect of protecting the drill bit.

Description

Technical Field

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

[0002] A foundation pit is an earth pit excavated at the design position of the foundation according to the base elevation and the foundation plan dimensions. As the foundation area for underground engineering construction, it is excavated on the ground, and its main purpose is to provide a placement space for the foundation of the building.

[0003] A pile foundation is a foundation treatment method in which reinforced concrete cylindrical objects are inserted into the soil to enhance the bearing capacity of the foundation. The pile foundation is composed of foundation piles and a bearing platform connected to the top of the piles. If the entire pile body is buried in the soil and the bottom surface of the bearing platform contacts the soil mass, it is called a low-capacity pile foundation; if the upper part of the pile is exposed above the ground and the bottom of the bearing platform is above the ground, it is called a high-capacity pile foundation. Building pile foundations are usually low-capacity pile foundations and are widely used in projects such as high-rise buildings, bridges, and high-speed railways.

[0004] When constructing a pile foundation, a drilling device is required. The drill bit of the existing drilling device is prone to damage during long-term or high-frequency use. Especially when the drill bit contacts the rock during uniform drilling, the hard nature of the rock makes it difficult for the drill bit to continue to penetrate, which accelerates the wear of the drill bit and even causes premature damage to the drill bit. This not only increases the replacement frequency of the drill bit but also raises the drilling cost. Summary of the Invention

[0005] The present invention provides a drilling device for deep foundation pit pile foundation construction, which solves the technical problem that the drill bit of the existing drilling device is prone to damage during long-term or high-frequency use. Especially when the drill bit contacts the rock during uniform drilling, the hard nature of the rock makes it difficult for the drill bit to continue to penetrate, which accelerates the wear of the drill bit and even causes premature damage to the drill bit. This not only increases the replacement frequency of the drill bit but also raises the drilling cost.

[0006] The present invention provides a drilling device for deep foundation pit pile foundation construction, including a transport vehicle, and a connecting mechanism is connected to the transport vehicle through a lifting mechanism;

[0007] The connecting mechanism includes a second driving member, and a first connecting member is fixedly installed 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 formed in the first connecting member, and a second connecting member is slidably installed in the cavity and limited by a clamping component. The second connecting member is used to connect the drill pipe or the drill bit. A piston block is arranged on the second connecting member. A first spring is fixedly installed on the inner top wall of the cavity, and the first spring abuts against the piston block. The lifting mechanism drives the drill bit to descend at a constant speed. When the drill bit contacts the rock, it 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.

[0008] As a further optimized solution of the present invention, the clamping component includes a sliding cylinder slidably installed in the cavity. A first tooth block is fixed on the sliding cylinder, and a second tooth block meshing with the first tooth block is fixedly installed on the second connecting member.

[0009] As a further optimized solution of the present invention, a plurality of through holes are formed in the first connecting member, and bolts threadedly connected to the second connecting member are arranged in the through holes.

[0010] As a further optimized solution of the present invention, a sliding groove is formed in the first tooth block, and a clamping block is slidably installed in the sliding groove. One end of a 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 sliding groove.

[0011] As a further optimized solution of the present invention, a plurality of grooves are formed in the first tooth block, and balls are movably installed in the grooves.

[0012] As a further optimized solution of the present invention, the lifting mechanism includes a mounting frame fixedly installed on the transport vehicle, and a lifting block driven by a first driving member to move radially on the mounting frame is slidably installed on the mounting frame.

[0013] As a further optimized solution of the present invention, an alarm component is arranged on the first connecting member. A plurality of air holes communicating with the cavity are formed in the first connecting member, and whistles are arranged in the air holes. An annular groove is formed in the cavity, and a blocking ring for blocking the air holes is slidably installed in the annular groove. The inner diameter of the blocking ring is larger than the outer diameter of the piston block.

[0014] As a further optimized solution of the present invention, an anti-seepage component is arranged on the second tooth block. The anti-seepage component includes a positioning rod fixedly installed on the second tooth block. An anti-seepage ring is slidably installed 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.

[0015] As a further optimized solution of the present invention, an installation groove is provided on the anti-seepage ring, and a water-swellable glue is arranged in the installation groove.

[0016] As a further optimized solution of the present invention, an annular hole is provided in the anti-seepage ring, an air inlet channel communicating with the annular hole is provided on the anti-seepage ring, and an air outlet channel communicating with the annular hole is provided on the anti-seepage ring.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. When the first driving member drives the drill bit to continue to descend in the present invention, the presence of the rock makes the drill bit unable to penetrate, and the piston block on the second connecting member will squeeze the cavity and the first spring for buffering to achieve the effect of initially protecting the drill bit.

[0019] 2. As the first connecting member continues to descend in the present invention, 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 rotates idly and cannot continue to drive the second connecting member to rotate, so that the drill bit no longer rubs against the rock, thereby further achieving the effect of protecting the drill bit.

[0020] 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 in the present invention, the first spring will drive the second connecting rod to quickly reset, resulting in the drill bit hitting the rock and causing secondary damage. The second spring will drive the block to move in the chute and block the gap between the first tooth blocks to prevent the second tooth block from resetting and re-engaging with the first tooth block. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0022] Figure 2 is a schematic structural diagram of the second driving member of the present invention;

[0023] Figure 3 is a schematic structural diagram of the connecting mechanism of the present invention;

[0024] Figure 4 is a schematic structural diagram of the plugging ring of the present invention;

[0025] Figure 5 is a schematic structural diagram of the sliding cylinder of the present invention;

[0026] Figure 6 is a schematic structural diagram of the second connecting member of the present invention;

[0027] Figure 7 is a schematic structural diagram of the first tooth block of the present invention;

[0028] Figure 8 is a schematic structural diagram of the block of the present invention;

[0029] Figure 9 It is a schematic structural diagram of the anti-seepage ring of the present invention.

[0030] In the figure:

[0031] 10. Transport vehicle;

[0032] 20. Lifting mechanism; 21. Mounting frame; 22. Lifting block; 23. First driving member;

[0033] 30. Connecting mechanism; 31. Second driving member; 32. First connecting member; 33. Cavity; 34. Second connecting member; 35. First spring;

[0034] 40. Positioning component; 41. Slide cylinder; 42. First tooth block; 43. Second tooth block; 44. Bolt; 45. Chute; 46. Block; 47. Second spring; 48. Ball; 49. Piston block;

[0035] 50. Alarm component; 51. Air hole; 52. Whistle; 53. Sealing ring; 54. Annular groove;

[0036] 60. Anti-seepage component; 61. Positioning rod; 62. Anti-seepage ring; 63. Third spring; 64. Installation groove; 65. Water-swellable glue; 66. Annular hole; 67. Air inlet channel; 68. Air outlet channel. Detailed implementation mode

[0037] Now, the subject matter described herein will be discussed with reference to exemplary embodiments. It should be understood that discussing these embodiments is only to enable those skilled in the art to better understand and thus implement the subject matter described herein. Without departing from the scope of protection of the content of this specification, changes can be made to the functions and arrangements of the elements discussed. Each example can omit, substitute, or add various processes or components as needed. Additionally, the features described relative to some examples can also be combined in other examples.

[0038] As Figures 1 to 6 shown, a drilling device for deep foundation pit pile foundation construction includes a transport vehicle 10, and a connecting mechanism 30 is connected to the transport vehicle 10 through a lifting mechanism 20;

[0039] The connecting mechanism 30 includes a second driving member 31. A first connecting member 32 is fixedly installed on the output shaft of the second driving member 31. The second driving member 31 drives the first connecting member 32 to rotate along the axis of its output shaft. A cavity 33 is formed in the first connecting member 32. A second connecting member 34 is slidably installed in the cavity 33 and is limited by a clamping component 40. The second connecting member 34 is used to connect the drill pipe or the drill bit. A piston block 49 is arranged on the second connecting member 34. A first spring 35 is fixedly installed on the inner top wall of the cavity 33. The first spring 35 abuts against the piston block 49. The lifting mechanism 20 drives the drill bit to descend at a constant speed. When the drill bit contacts the rock, it drives the second connecting member 34 to move in the cavity 33, and buffers the drill bit in cooperation with the air in the cavity 33 and the first spring 35.

[0040] The clamping component 40 includes a sliding cylinder 41 slidably installed in the cavity 33. A first tooth block 42 is fixed on the sliding cylinder 41. A second tooth block 43 meshing with the first tooth block 42 is fixedly installed on the second connecting member 34.

[0041] A plurality of through holes are formed in the first connecting member 32. Bolts 44 threadedly connected to the second connecting member 34 are arranged in the through holes; the bolts 44 are used for quickly installing or disassembling the sliding cylinder 41, which is convenient for maintenance.

[0042] The lifting mechanism 20 includes a mounting frame 21 fixedly installed on the transport vehicle 10. A lifting block 22 driven by a first driving member 23 to move radially on the mounting frame 21 is slidably installed on the mounting frame 21.

[0043] When the invention is used for pile foundation construction and drilling, the drill bit or the drill pipe equipped with the drill bit is connected to the second connecting member 34. Then, the first driving member 23 is started to drive the lifting block 22 to move downward on the mounting frame 21. The lifting block 22 drives the second driving member 31, the first connecting member 32 and the second connecting member 34 to descend together. During the descending process, the second driving member 31 drives the first connecting member 32 to rotate. The first connecting member 32 drives the second connecting member 34 and the drill bit or drill pipe installed thereon to rotate under the clamping cooperation of the first tooth block 42 and the second tooth block 43. After the drill bit contacts the ground, the drilling process is carried out (the cavity 33 and the first spring 35 can provide sufficient pressure to drill through the soil);

[0044] Since the underground rocks are difficult to be observed by personnel, as the drill bit continuously penetrates deeper, it is easy for the drill bit to come into contact with the rocks. When the drill bit touches the rocks, it is difficult to continue descending. At this time, if the drill bit continues to drill into the rocks downward, it will cause irreversible damage to the drill bit. Therefore, when the first driving member 23 drives the drill bit to continue descending, the presence of the rocks makes the drill bit unable to drill. The piston block 49 on the second connecting member 34 will squeeze the cavity 33 and the first spring 35 for buffering to achieve the effect of initially protecting the drill bit. And as the first connecting member 32 continuously descends, 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 rotates idly and cannot continue to drive the second connecting member 34 to rotate, so that the drill bit no longer rubs against the rocks, thereby further achieving the effect of protecting the drill bit.

[0045] As Figure 8 shown, a chute 45 is formed in the first tooth block 42, a clamping block 46 is slidably installed in the chute 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 chute 45;

[0046] 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, and the first spring 35 drives the second connecting rod to quickly reset, resulting in secondary damage to the drill bit due to the impact between the drill bit and the rocks, the second spring 47 will drive the clamping block 46 to move in the chute 45 and block the gap between the first tooth blocks 42, preventing 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 maintenance, the sliding cylinder 41 is disassembled to reset the clamping block 46 so that the first tooth block 42 and the second tooth block 43 are re-engaged.

[0047] As Figure 7 shown, a plurality of grooves are formed in 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.

[0048] As Figure 3 shown, an alarm assembly 50 is arranged on the first connecting member 32. A plurality of air holes 51 communicating with the cavity 33 are formed in the first connecting member 32, whistles 52 are arranged in the air holes 51, a ring groove 54 is formed in the cavity 33, and a blocking ring 53 for blocking the air holes 51 is slidably installed in the ring groove 54. The inner diameter of the blocking ring 53 is larger than the outer diameter of the piston block 49;

[0049] After the drill bit malfunctions, in order to alert the staff at the construction site, during the separation process of the first tooth block 42 and the second tooth block 43, the piston block 49 will contact the sealing ring 53, and after the separation of the first tooth block 42 and the second tooth block 43, it will drive the sealing ring 53 to release the blockage of the air hole 51. Immediately, the gas in the cavity 33 will be discharged along the air hole 51, and the airflow passing through the air hole 51 will cause the whistle 52 to sound, reminding the on-site staff that the working state of the drill bit is abnormal, so as to repair the drill bit in time.

[0050] As Figure 9 shown, an anti-seepage component 60 is provided on the second tooth block 43. The anti-seepage component 60 includes a positioning rod 61 fixedly installed on the second tooth block 43. An anti-seepage ring 62 is slidably installed on the positioning rod 61. The anti-seepage ring 62 is slidably connected to the second connecting member 34. 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;

[0051] In order to prevent the slurry for protecting the wall from seeping 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, achieving the effect of preventing the slurry for protecting the wall from entering the cavity 33.

[0052] An installation groove 64 is provided on the anti-seepage ring 62, and a water-swellable glue 65 is provided in the installation groove 64; when the slurry enters the gap between the anti-seepage ring 62 and the first connecting member 32, the water-swellable glue 65 absorbs water and swells, thereby further improving the sealing performance between the anti-seepage ring 62 and the first connecting member 32, and further preventing the slurry from entering the cavity 33.

[0053] 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; 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 dehydrates and shrinks, and then the water-swellable glue 65 can be reused.

[0054] Working principle: Connect the drill bit or the drill pipe equipped with the drill bit to the second connecting piece 34. Then, start the first driving piece 23 to drive the lifting block 22 to move downward on the mounting frame 21. The lifting block 22 drives the second driving piece 31, the first connecting piece 32 and the second connecting piece 34 to descend together. During the descent, the second driving piece 31 drives the first connecting piece 32 to rotate. The first connecting piece 32 drives the second connecting piece 34 and the drill bit or drill pipe mounted thereon to rotate under the engagement of the first tooth block 42 and the second tooth block 43. After the drill bit contacts the ground, the drilling process is carried out. When the first driving piece 23 drives the drill bit to continue descending and the presence of rocks causes the drill bit to be unable to penetrate, the piston block 49 on the second connecting piece 34 will squeeze the cavity 33 and the first spring 35 for buffering. And as the first connecting piece 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 piece 32 rotates idly and cannot continue to drive the second connecting piece 34 to rotate, so that the drill bit no longer rubs against the rocks. At the same time, the second spring 47 will drive the clamping block 46 to move in the sliding groove 45 and block the gap between the first tooth blocks 42 to prevent the second tooth block 43 from resetting and engaging with the first tooth block 42 again. After the drill bit is withdrawn from the pile foundation hole for maintenance, then disassemble the sliding cylinder 41 to reset the clamping block 46 so that the first tooth block 42 and the second tooth block 43 are engaged again. After the drill bit appears abnormal, in order to warn the staff at the construction site, when the first tooth block 42 and the second tooth block 43 are separated, the piston block 49 will contact the sealing ring 53, and drive the sealing ring 53 to release the sealing of the air hole 51 after the first tooth block 42 and the second tooth block 43 are separated. Then the gas in the cavity 33 will be discharged along the air hole 51, and the airflow passing through the air hole 51 will cause the whistle 52 to 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, achieving the effect of preventing the slurry for protecting the wall from entering the cavity 33. Input high-temperature gas 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 dehydrates and shrinks, enabling the water-swellable glue 65 to be reused.

[0055] The above describes the embodiments of the present invention, but the embodiments are not limited to the above specific implementation manners. The above specific implementation manners are only illustrative and not restrictive. Under the inspiration of this embodiment, those of ordinary skill in the art can also make many forms, all of which fall within the protection scope of 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 locking 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); 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); The anti-seepage ring (62) is provided with a mounting groove (64), and water-swellable glue (65) is arranged in the mounting groove (64); 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).

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).

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