A rotary drilling device for pile foundation construction

Abstract

The present application relates to pile hole mechanical equipment technical field, specifically disclose a rotary drilling device for pile foundation construction, including machine body, the drill pipe is set on the machine body, the power head is set on the machine body and the drill cylinder is set on the lower end of the drill pipe, the bottom end of the drill cylinder is provided with the bottom plate mechanism for sealing, the compaction mechanism includes the pressing plate set in the drill cylinder and the sleeve set on the pressing plate, the pressing plate is fixedly connected with the lower end of the drill pipe, the drill cylinder is sleeved on the sleeve, and the drill cylinder is slidably installed on the sleeve in the vertical direction, the pressing plate is provided with the clutch part one for locking the pressing plate and the drill cylinder, the sleeve is provided with the clutch part two for locking the sleeve and the pressing plate or the drill cylinder, the drill cylinder is provided with the clutch part three for locking the drill cylinder and the power head, after the drill cylinder is filled with soil, the pressing plate is disconnected with the drill cylinder, the soil in the sleeve and the drill cylinder is compacted by the pressing plate descending; the beneficial effects of the present application: the soil in the drill cylinder is compacted, so as to improve the efficiency of pile foundation construction.

Description

Technical Field

[0001] This invention relates to the field of pile drilling machinery and equipment, specifically to a rotary drilling device for pile foundation construction. Background Technology

[0002] A rotary drilling rig is a heavy-duty machine used for foundation pile hole construction. Its main function is to efficiently and precisely excavate soil or rock strata using a rotating drill bucket. The equipment consists of core components such as a power system, hydraulic system, drill rod, drill bucket, and mast structure. Hydraulic drive rotates and lowers the drill rod, causing the drill bucket to cut into the ground and extract soil and rock. A winch system then lifts the drill bucket to the surface for unloading, repeating the process until the designed depth of the pile hole is formed. Due to its fast drilling speed, wide adaptability to various geological formations, high degree of automation, and minimal impact on the surrounding environment, rotary drilling rigs have become a key technological tool for bored pile construction in modern large-scale projects such as buildings, bridges, and ports, significantly improving the efficiency and quality of foundation engineering construction.

[0003] Chinese patent document CN221742553U discloses a double-bottom sand dredging bucket, including a cylinder, a bottom door device, and a locking component. The bottom door device includes a first bottom door and a second bottom door. The cylinder includes a first mounting plate, and the first bottom door includes a second mounting plate. The first and second mounting plates are respectively provided with a plurality of protrusions. Each protrusion has a through hole of the same shape and size and corresponding position. The plurality of protrusions on the first mounting plate and the plurality of protrusions on the second mounting plate are alternately inserted and connected, and are fixed by bolts passing through the through holes and engaging with nuts. The second bottom door is also provided with a drilling mechanism for drilling and cutting. The locking component is located inside the cylinder and is used to lock the first bottom door to the cylinder. After the cylinder is raised to the ground, the locking component opens, allowing the double bottom door to rotate along the pin on the other side to complete the slag discharge.

[0004] During pile foundation construction, as the hole depth increases, the time it takes for the drill pipe to travel back and forth between the bottom of the hole and the ground also gradually increases. However, because the soil is broken up by the drill pipe, the space occupied by the soil increases, resulting in the actual load inside the drill pipe being less than the volume of the drill pipe. Consequently, the efficiency of pile foundation construction is reduced. Summary of the Invention

[0005] This invention provides a rotary drilling device for pile foundation construction, aiming to solve the problem in related technologies where the space occupied by the soil increases due to the breaking of the soil by the drill tube, resulting in the actual loading capacity inside the drill tube being less than the volume of the drill tube, thus reducing the efficiency of pile foundation construction.

[0006] A rotary drilling device for pile foundation construction includes a body, a drill rod mounted on the body, a power head mounted on the body, and a drill cylinder mounted at the lower end of the drill rod. A base plate mechanism is provided at the bottom end of the drill cylinder. The device also includes:

[0007] The compaction mechanism includes a sleeve passing through the drill barrel and a pressure plate passing through the sleeve. The pressure plate is fixedly connected to the lower end of the drill rod. The drill barrel is sleeved on the sleeve and slides vertically on the sleeve. The pressure plate is provided with a clutch component one for locking the pressure plate and the drill barrel. The sleeve is provided with a clutch component two for locking the sleeve and the pressure plate or the drill barrel. The drill barrel is provided with a clutch component three for locking the drill barrel and the power head.

[0008] After the drill barrel is filled with soil, the pressure plate is disconnected from the drill barrel. The pressure plate descends to compact the soil in the sleeve and drill barrel. Then the pressure plate is reset and locked with the drill barrel. The drill barrel continues to rotate and dig holes. When the drill barrel is unloading soil, the bottom plate mechanism opens, and the clutch locks the drill barrel and the power head. Then the pressure plate is disconnected from the sleeve, and the sleeve is locked with the drill barrel. At this time, the pressure plate descends to discharge the soil.

[0009] The effect is as follows: by setting a pressure plate and a sleeve inside the drill barrel, the drill rod can be lowered after the drill barrel is filled with soil, thereby compacting the soil inside the drill barrel. Since the pressure plate will drive the sleeve to fall together when it falls, the soil inside the drill barrel can be pressed into the sleeve and compacted. Therefore, after the pressure plate and sleeve are reset, the soil inside the drill barrel can be located in the upper part of the drill barrel, thereby reducing the soil on the upper side of the bottom plate mechanism. This prevents the soil from being unable to enter the drill barrel when the drill barrel rotates to dig soil later. Furthermore, since the soil is compacted, soil can continue to enter the drill barrel, thereby increasing the amount of soil excavated when the drill barrel is inserted into the pile foundation hole in a single operation, thus improving the efficiency of a single drilling operation.

[0010] Preferably, the clutch component includes a boss on the pressure plate, and a limiting groove is formed on the inner circumferential wall of the drill barrel. The limiting groove consists of a horizontal section and a vertical section, and the boss is slidably installed in the limiting groove.

[0011] Its effect is that it can use the reverse rotation of the drill rod to close the bottom plate mechanism, while separating the pressure plate and the drill barrel, so that the drill rod can drive the pressure plate to descend inside the drill barrel and compact the soil.

[0012] Preferably, the clutch component 2 includes an elastic telescopic block 1 disposed on the pressure plate, a pusher for retracting the elastic telescopic block 1 into the pressure plate, and a locking component 1 for locking the sleeve and the drill barrel. The elastic telescopic block 1 extends and retracts along the radial direction of the pressure plate. A groove is provided on the inner side wall of the sleeve. When the drill barrel unloads soil, the pusher pushes the elastic telescopic block 1 out of the groove.

[0013] Preferably, the pushing member includes a pressure rod passing through the sleeve, the upper end of the pressure rod extending beyond the upper end of the drill barrel, and a spiral groove formed on the pressure rod. The sleeve is provided with a protrusion that slides within the spiral groove. A push plate is provided on the pressure rod. An elastic element is provided between the pressure rod and the drill barrel to reset the pressure rod. When the drill barrel unloads soil, the power head descends, pushing the pressure rod down, thereby causing the push plate to rotate and push the elastic telescopic block out of the groove.

[0014] Its effect is that by opening a spiral groove on the pressure rod, and then using the process of the power head to lower the pressure rod, the pressure rod rotates, thereby pushing the elastic telescopic block out of the groove, thus achieving the separation of the pressure plate and the sleeve.

[0015] Preferably, the locking component one includes an annular platform one disposed at the upper end of the drill barrel and a limiting block two disposed on the pressure rod. The pressure rod passes through the annular platform one, and the limiting block two is located above the annular platform one. An obstacle hole one communicating with the groove is provided on the sleeve. The obstacle hole one is used to allow the push plate to pass through. An outer fan-shaped groove is provided on the outer circumferential wall of the pressure plate. A slider is slidably installed in the fan-shaped groove along the circumferential direction of the pressure plate. An elastic telescopic block one is disposed on the slider.

[0016] Its effect is that by opening a ring platform at the upper end of the drill barrel and a clearance hole communicating with the groove on the sleeve, the push plate can push the elastic telescopic block out of the groove when the pressure rod rotates, and then the push plate enters the groove, thereby locking the drill barrel and the sleeve. At this time, when the pressure plate descends, the compacted soil in the sleeve can be discharged.

[0017] Preferably, a limiting groove 2 is formed on the inner circumferential wall of the sleeve. The upper end of the limiting groove 2 is connected to the groove, and a baffle is provided at the lower end of the limiting groove 2. After the elastic telescopic block 1 exits from the groove, it slides vertically in the limiting groove 2.

[0018] Preferably, the clutch component three includes an elastic telescopic block two disposed on the power head, and a stop bar is disposed at the upper end of the drill barrel. When the drill barrel is unloading soil, the power head presses down to move the elastic telescopic block two below the stop bar and engage the elastic telescopic block two with the stop bar, thereby locking the drill barrel and the power head.

[0019] Preferably, the lower end of the sleeve is provided with a wedge-shaped surface.

[0020] Preferably, the drill barrel is further provided with a locking member two for locking the base plate mechanism and the drill barrel. When the pressure rod descends relative to the drill barrel, the base plate mechanism and the drill barrel are unlocked.

[0021] Preferably, the second locking component includes a connecting rod rotatably mounted on the lower end of the pressure rod and a first hook hinged to the drill barrel. The base plate mechanism is provided with a second hook for engaging with the first hook. The lower end of the connecting rod is slidably engaged with the first hook. When the pressure rod descends relative to the drill barrel, it pushes the first hook to rotate, thereby unlocking the first hook from the second hook.

[0022] Its effect is that by rotating the pressure rod and connecting rod together, the sleeve and pressure plate can be disconnected and the sleeve and drill barrel locked at the same time during the process of opening the base plate mechanism by lowering the power head.

[0023] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0024] By installing a pressure plate and a sleeve inside the drill barrel, the drill rod descends after the drill barrel is filled with soil, thus compacting the soil in the drill barrel. Because the descending pressure plate will drive the sleeve down with it, the downward movement of the pressure plate can squeeze the soil in the drill barrel into the sleeve and compact the soil in the sleeve. After the pressure plate and sleeve are reset, the soil in the drill barrel will be in the upper part of the drill barrel, which can reduce the soil on the upper side of the base plate mechanism. This can prevent the soil from being unable to enter the drill barrel when the drill barrel rotates to dig soil later. Since the soil has been compacted, the drill barrel can continue to advance soil, thereby increasing the amount of soil excavated by the drill barrel in a single extension into the pile foundation hole, improving the efficiency of a single drilling operation. Moreover, the above operation process is mostly based on the operation process of existing equipment, the equipment structure is simple, and the operation process is convenient. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 This is a schematic diagram of the drill barrel structure of the present invention.

[0027] Figure 3 This is a partial structural schematic diagram of the power head of the present invention.

[0028] Figure 4 This is a cross-sectional view of the compaction mechanism of the present invention.

[0029] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0030] Figure 6 This is a schematic diagram of the structure of the pressure plate and sleeve of the present invention.

[0031] Figure 7 This is a schematic diagram of the structure of the pressure plate and pressure rod of the present invention.

[0032] Figure 8 This is a cross-sectional view of the drill barrel of the present invention.

[0033] Figure 9 This is a cross-sectional view of the sleeve of the present invention.

[0034] Figure label:

[0035] 1. Machine body; 2. Drill rod; 3. Power head; 31. Fan-shaped plate; 32. Elastic telescopic block II; 4. Drill barrel; 41. Limiting groove I; 42. Ring platform I; 43. Stop bar; 5. Base plate mechanism; 51. First base plate; 52. Second base plate; 53. Locking component II; 531. Connecting rod; 532. Hook I; 533. Hook II; 6. Compacting mechanism; 61. Pressure plate; 62. Sleeve; 621. Groove; 622. Limiting groove II; 623. Baffle; 624. Protrusion; 625. Ring platform II; 626. Clearance hole I; 627. Clearance hole II; 63. Boss; 64. Elastic telescopic block I; 65. Pressure rod; 651. Push plate; 652. Elastic component I; 653. Spiral groove; 654. Limiting block II. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] like Figure 1 As shown in the figure, a rotary drilling device for pile foundation construction according to an embodiment of the present invention includes a body 1, a drill rod 2, a power head 3, a drill cylinder 4, a base plate mechanism 5, and a compaction mechanism 6. The drill rod 2 is mounted on the body 1, and the power head 3 is sleeved on the drill rod 2 and mounted on the body 1. The power head 3 is used to drive the drill rod 2 to rotate and apply downward pressure to the drill rod 2. The drill cylinder 4 is located at the lower end of the drill rod 2 and is used to break up the soil and collect it into the drill cylinder 4. The base plate mechanism 5 is located at the bottom end of the drill cylinder 4 and is used to seal the bottom end of the drill cylinder 4. The compaction mechanism 6 is located inside the drill cylinder 4 and is used to compact the soil inside the drill cylinder 4 after the drill cylinder 4 is filled with soil, so that the drill cylinder 4 can hold more soil.

[0038] During pile foundation construction, the power head 3 drives the drill rod 2 to rotate forward, and the drill rod 2 drives the drill cylinder 4 to rotate forward. At the same time, the power head 3 applies downward pressure to the drill rod 2, which causes the drill cylinder 4 to break up the soil at the construction site and gradually collect it into the drill cylinder 4. When the drill cylinder 4 is full of soil, the drill rod 2 reverses and drives the drill cylinder 4 to reverse, causing the bottom plate mechanism 5 to close the drill cylinder 4. Then, the compaction mechanism 6 compacts the broken soil in the drill cylinder 4, and the compacted soil in the drill cylinder 4 is located in the upper half of the drill cylinder 4, so that the bottom end of the drill cylinder 4 can smoothly enter the soil. Then the drill cylinder 4 continues to rotate forward to dig the hole. When the drill cylinder 4 is full of soil for the second time, the drill rod 2 drives the drill cylinder 4 to rise to the ground. Then, the power head 3 descends to open the bottom plate mechanism 5, and then the compaction mechanism 6 pushes the soil in the drill cylinder 4 downward.

[0039] like Figures 1-4As shown, the base plate mechanism 5 includes a first base plate 51, a second base plate 52, and a locking element 53. A hinge shaft is provided at the left end of the upper surface of the first base plate 51, and a hollow shaft is provided at the lower end of the drill barrel 4. The hinge shaft is rotatably installed inside the hollow shaft. A through-hole is provided at the center of the first base plate 51. An upwardly extending connecting shaft is provided at the center of the upper surface of the second base plate 52, and the connecting shaft is rotatably installed inside the through-hole. Two through-holes are provided on the first base plate 51, arranged in a circular array around the axis of the first base plate 51. Two through-holes are provided on the second base plate 52. Two mud inlet holes are arranged in a circular array around the axis of the second base plate 52. Multiple cutting teeth are provided on the hole walls of the two mud inlet holes, and the multiple cutting teeth are arranged in a radial direction along the second base plate 52. Locking member 2 53 is used to lock the first base plate 51 and the drill barrel 4. A limit block 1 is provided on the lower end surface of the first base plate 51. When the mud inlet hole 1 and the mud inlet hole 2 are connected, the hole wall of the mud inlet hole 2 abuts against the right end of the limit block 1. When the drill barrel 4 reverses, the second base plate 52 rotates clockwise relative to the first base plate 51 by the cutting teeth under the obstruction of the soil until the hole wall of the mud inlet hole 2 abuts against the left end of the limit block 1, at which point the mud inlet hole 1 is closed by the second base plate 52.

[0040] like Figures 1-5 As shown, the locking component 53 includes a connecting rod 531, a first hook 532, and a second hook 533. The connecting rod 531 is located inside the drill barrel 4. The first hook 532 is composed of a horizontal rod and a vertical rod. A through-hole 2 is provided at the connection between the horizontal rod and the vertical rod. A through-hole 4 is provided on the wall of the drill barrel 4. A hinge shaft 2 with its axis arranged in the front-back direction is provided in the installation hole. The hinge shaft 2 passes through the second hole. The horizontal rod of the first hook 532 is located inside the drill barrel 4. An inclined surface 1 and a horizontal surface 1 are provided on the vertical rod of the first hook 532. The inclined surface 1 is located below the horizontal surface 1. The second hook 533 is located on the upper end surface of the first base plate 51. An inclined surface 2 and a horizontal surface 2 are provided on the second hook 533. The inclined surface 2 is located above the horizontal surface 2. A groove is provided at the end of the horizontal rod of the first hook 532 away from the hinge shaft 2. The lower end of the connecting rod 531 is slidably installed in the groove in the left-right direction.

[0041] When the first base plate 51 is locked to the drill barrel 4, the second horizontal plane of hook 2 533 is above the first horizontal plane of hook 1 532, and the two are in contact with each other. When the drill barrel 4 unloads soil and the power head 3 descends, the connecting rod 531 moves downward, which in turn causes the connecting rod 531 to press hook 1 532 to rotate counterclockwise. The counterclockwise rotation of hook 1 532 causes the first horizontal plane on hook 1 532 to move to the lower right, thereby causing the first horizontal plane to disengage from the second horizontal plane, and thus unlocking hook 1 532 from hook 2 533. Then the first base plate 51 deflects downward, and at this time the lower end of the drill barrel 4 opens, and the soil slides out of the drill barrel 4 under the action of gravity.

[0042] like Figures 1-9 As shown, the compaction mechanism 6 includes a pressure plate 61 and a sleeve 62. The pressure plate 61 is fixedly installed at the lower end of the drill rod 2. The sleeve 62 is sleeved on the pressure plate 61. The drill cylinder 4 is sleeved on the sleeve 62 and is slidably installed on the sleeve 62 in the vertical direction. The pressure plate 61 is provided with a clutch component one that locks the pressure plate 61 and the drill cylinder 4. The sleeve 62 is provided with a clutch component two that locks the sleeve 62 and the pressure plate 61 or the drill cylinder 4. The drill cylinder 4 is provided with a clutch component three that locks the drill cylinder 4 and the power head 3. The upper end of the sleeve 62 is provided with a ring platform 625. The pressure plate 61 is located on the lower side of the ring platform 625. The lower end of the sleeve 62 is provided with a wedge-shaped surface for allowing the soil in the drill cylinder 4 to enter the sleeve 62.

[0043] When the drill barrel 4 is filled with soil for the first time, the drill rod 2 drives the pressure plate 61 to reverse. At this time, the clutch disengages the pressure plate 61 from the drill barrel 4. The pressure plate 61 reverses first, then the drill rod 2 drives the pressure plate 61 to descend and the sleeve 62 to descend, pressing the soil in the drill barrel 4 into the sleeve 62 and compacting the soil. After that, the drill rod 2 drives the pressure plate 61 to rise and reset. Then, after the drill rod 2 drives the pressure plate 61 to rotate forward, the clutch locks the pressure plate 61 from the drill barrel 4. The drill barrel 4 continues to rotate and dig. When the drill barrel 4 unloads soil, the power head 3 descends and causes the connecting rod 531 to descend. At the same time, the clutch assembly locks the drill barrel 4 and the power head 3. After the clutch assembly locks the sleeve 62 to the drill barrel 4, it disconnects the sleeve 62 from the pressure plate 61. The connecting rod 531 descends and pushes the first hook 532 to rotate counterclockwise, causing the first hook 532 to disengage from the second hook 533. The first base plate 51 deflects downward under the action of gravity. At this time, the loose soil in the drill barrel 4 slides down under the action of gravity. Then, the drill rod 2 drives the pressure plate 61 to descend, pushing the compacted soil in the sleeve 62 out of the sleeve 62. Since the inner diameter of the drill barrel 4 is larger than the inner diameter of the sleeve 62, the compacted soil can slide directly down from the drill barrel 4 after being pushed out of the sleeve 62.

[0044] After the soil in the drill barrel 4 is unloaded, the drill rod 2 moves upward, causing the pressure plate 61 to reset in the sleeve 62. Then, when the drill rod 2 rotates forward, clutch one locks the pressure plate 61 to the drill barrel 4. Then, the power head 3 rises and resets, causing clutch three to disconnect the drill barrel 4 from the power head 3. At the same time, clutch two locks the pressure plate 61 to the sleeve 62 and then disconnects the sleeve 62 from the drill barrel 4.

[0045] like Figures 3-9As shown, the clutch component includes two bosses 63 on the outer circumferential wall of the pressure plate 61. The two bosses 63 are arranged in a circular array around the axis of the pressure plate 61. Two limiting grooves 41 are opened on the inner circumferential wall of the drill barrel 4. The two limiting grooves 41 are arranged in a circular array around the axis of the drill barrel 4. The limiting grooves 41 are composed of a horizontal section and a vertical section. The two bosses 63 are slidably installed in the two limiting grooves 41 respectively. Two clearance holes 627 are opened on the sleeve 62. The clearance holes 627 are used to allow the bosses 63 to pass through the sleeve 62 and then insert into the limiting grooves 41.

[0046] When the drill barrel 4 is drilling, the boss 63 is at the end of the horizontal section away from the vertical section. When the drill rod 2 drives the pressure plate 61 to rotate clockwise, the pressure plate 61 drives the drill barrel 4 to rotate clockwise through the boss 63. When the power head 3 applies downward pressure to the drill rod 2, the drill rod 2 applies downward pressure to the drill barrel 4 through the boss 63 on the pressure plate 61. When the drill barrel 4 is filled with soil for the first time, the drill rod 2 drives the pressure plate 61 to rotate counterclockwise. At this time, the boss 63 moves from the horizontal section of the limiting groove 41 to the vertical section, and then... The drill rod 2 continues to drive the pressure plate 61 to rotate in the opposite direction, and drives the drill barrel 4 to rotate in the opposite direction through the boss 63, so that the first bottom plate 51 rotates in the opposite direction relative to the second bottom plate 52. At this time, the second bottom plate 52 blocks the mud inlet hole on the first bottom plate 51. Then the drill rod 2 moves downward and drives the pressure plate 61 to move downward. Since the clutch 2 locks the sleeve 62 and the pressure plate 61 at this time, the pressure plate 61 moves downward and drives the sleeve 62 to move downward, thereby compacting the soil in the sleeve 62 and the drill barrel 4.

[0047] Then, drill rod 2 rises and drives pressure plate 61 to rise. When pressure plate 61 rises, it drives sleeve 62 to rise and reset. When sleeve 62 rises, it can drive the compacted soil inside sleeve 62 to rise, thereby reducing the soil above mud inlet hole 1. When sleeve 62 resets, drill rod 2 rotates clockwise. When pressure plate 61 drives boss 63 to move to the end away from vertical section in horizontal section, pressure plate 61 drives drill barrel 4 to rotate clockwise together. When drill barrel 4 rotates clockwise, the first bottom plate 51 rotates clockwise relative to the second bottom plate 52, thereby opening mud inlet hole 1. At this time, as drill barrel 4 rotates clockwise, the soil is broken by the cutting teeth and enters drill barrel 4 through mud inlet hole 1.

[0048] like Figures 3-9As shown, the clutch element 2 is provided in two sets, arranged in a circumferential array around the axis of the sleeve 62. The clutch element 2 includes an elastic telescopic block 64 disposed on the pressure plate 61, a pusher for retracting the elastic telescopic block 64 into the pressure plate 61, and a locking element 1 for locking the sleeve 62 and the drill barrel 4. The elastic telescopic block 64 extends and retracts along the radial direction of the pressure plate 61. A groove 621 is provided on the inner circumferential wall of the sleeve 62. When the sleeve 62 is locked with the pressure plate 61, the elastic telescopic block 64 extends outward and inserts into the groove. When the drill barrel 4 unloads soil inside the groove 621, the pusher pushes the elastic telescopic block 64 out of the groove 621. A limiting groove 622 is opened on the inner circumferential wall of the sleeve 62. The upper end of the limiting groove 622 is connected to the groove 621, and a baffle 623 is provided at the lower end of the limiting groove 622. After the elastic telescopic block 64 exits from the groove 621, it slides vertically in the limiting groove 622. The limiting groove 622 is used to ensure that the elastic limiting block 64 is always located directly below the groove 621 after it is disengaged from the groove 621.

[0049] like Figures 3-9 As shown, the pushing component includes a pressure rod 65 passing through the sleeve 62. The upper end of the pressure rod 65 extends beyond the upper end of the drill barrel 4, and a spiral groove 653 is provided on the pressure rod 65. A protrusion 624 that slides within the spiral groove 653 is provided on the sleeve 62. A push plate 651 is provided on the pressure rod 65. An elastic element 652, which resets the pressure rod 65, is provided between the pressure rod 65 and the drill barrel 4. The elastic element 652 is a compression spring. When the drill barrel 4 unloads soil, the power head 3 descends, pushing the pressure rod 65 down. At the same time, the compression spring is compressed and stores force. When the pressure rod 65 descends, it rotates under the action of the spiral groove 653 and the protrusion 624. When the pressure rod 65 rotates, it causes the push plate 651 to rotate and pushes the elastic telescopic block 64 out of the groove 621. At the same time, the locking element locks the sleeve 62 and the drill barrel 4. When the power head 3 moves upward away from the drill barrel 4, the compression spring is released, causing the pressure rod 65 to move upward and reset.

[0050] like Figures 3-9 As shown, the locking component includes an annular platform 42 disposed on the upper end of the drill barrel 4 and a limiting block 654 disposed on the pressure rod 65. The pressure rod 65 passes through the annular platform 42, and the limiting block 654 is located above the annular platform 42. The sleeve 62 is provided with a clearance hole 626 communicating with the groove 621. Two fan-shaped grooves with outer through-holes are provided on the outer circumferential wall of the pressure plate 61. The two fan-shaped grooves are arranged in a circumferential array around the axis of the pressure plate 61. A slider is slidably installed in the fan-shaped groove along the circumferential direction of the pressure plate 61. An elastic telescopic block 64 is disposed on the slider. One of the pressure rods 65 is coaxially disposed with the connecting rod 531, and the lower end of the pressure rod 65 is rotatably connected to the upper end of the connecting rod 531 along the circumferential direction of the pressure rod 65.

[0051] When the pressure rod 65 moves downward under the push of the power head 3, the pressure rod 65 drives the connecting rod 531 to move downward together. When the pressure rod 65 rotates, causing the push plate 651 to rotate and push the elastic telescopic block 64 out of the groove 621, the lower end face of the limiting block 654 abuts against the upper end face of the ring platform 42. At the same time, the push plate 651 moves from the clearance hole 626 into the groove 621. When the drill rod 2 drives the pressure plate 61 to descend, the elastic telescopic block 64 slides downward along the limiting groove 622. Meanwhile, the sleeve 62 moves downward under the action of gravity until the upper end face of the push plate 651 abuts against the upper end face of the inner side of the groove 621. Since the pressure rod 65 is simultaneously installed on the ring platform 42 and the sleeve 62, after the pressure plate 61 reverses, it drives the drill barrel 4 to reverse, so that the second bottom plate 52 seals the mud inlet hole. At this time, when the pressure plate 61 rotates, it can separate from the mud in the sleeve 62, preventing the mud in the sleeve 62 from adhering to the pressure plate 61.

[0052] like Figures 2-4 As shown, the clutch component 3 includes two elastic telescopic blocks 32. The lower end of the power head 3 extends downward with two fan-shaped plates 31. The two elastic telescopic blocks 32 are respectively disposed on the two fan-shaped plates 31, and both elastic telescopic blocks 32 extend and retract along the radial direction of the power head 3. The ends of the two elastic telescopic blocks 32 that are close to each other are provided with arc surfaces. The upper end face of the drill barrel 4 is provided with two stop rods 43. The stop rods 43 are composed of two vertical rods extending upward from the upper end face of the drill barrel 4 and a horizontal rod disposed at the upper end of the two vertical rods.

[0053] When the drill barrel 4 is unloading soil, the power head 3 presses down. After the arc surface of the second elastic telescopic block 32 abuts against the crossbar, as the power head 3 continues to descend, the two elastic telescopic blocks 32 move away from each other and retract into the fan-shaped plate 31. When the second elastic telescopic block 32 moves to the bottom of the crossbar, the two elastic telescopic blocks 32 extend out from the fan-shaped plate 31 and abut against the lower end face of the crossbar, thereby locking the drill barrel 4 and the power head 3.

[0054] The implementation principle of the rotary drilling device for pile foundation construction of the present invention is as follows:

[0055] During pile foundation construction, the power head 3 first drives the drill rod 2 to rotate forward. When the drill rod 2 rotates forward, the boss 63 on the pressure plate 61 is at the end furthest from the vertical section within the horizontal section of the limiting groove 41. Therefore, the pressure plate 61 drives the drill cylinder 4 to rotate forward through the boss 63. At the same time, the power head 3 applies downward pressure to the drill rod 2, which causes the drill cylinder 4 to break up the soil at the construction site and gradually collect it into the drill cylinder 4. When the drill cylinder 4 is full of soil, the drill rod 2 rotates in reverse. At this time, the boss 63 is in the limiting groove 41. The drill rod 2 moves from the horizontal section to the vertical section, then continues to drive the pressure plate 61 to rotate in the opposite direction, and drives the drill cylinder 4 to rotate in the opposite direction through the boss 63. When the drill cylinder 4 rotates in the opposite direction, the second bottom plate 52 is fixed and does not rotate due to the resistance between the cutting teeth and the soil below. At this time, the first bottom plate 51 rotates in the opposite direction relative to the second bottom plate 52 until the wall of the second mud inlet hole abuts against the left end of the first limiting block. The first mud inlet hole is then closed by the second bottom plate 52. Then the drill rod 2 moves downward and drives the pressure plate 61 to move downward. The push plate 651 on the pressure rod 65 is located inside the clearance hole 626, and the elastic telescopic block 64 on the pressure plate 61 is inserted into the groove 621. Therefore, when the pressure plate 61 moves downward, it drives the sleeve 62 downward through the elastic telescopic block 64, thereby pressing the soil in the drill barrel 4 into the sleeve 62 and compacting the soil. Then, the drill rod 2 moves upward and drives the sleeve 62 upward through the pressure plate 61. When the sleeve 62 moves upward, it drives the compacted soil in the sleeve 62 upward, thereby reducing the impact of the pressure plate 65. Reduce the amount of soil above the first mud inlet hole to allow soil to enter smoothly. After the sleeve 62 is reset, the drill rod 2 rotates clockwise and drives the pressure plate 61 to rotate clockwise. When the pressure plate 61 drives the boss 63 to move to the end away from the vertical section in the horizontal section, the pressure plate 61 drives the drill barrel 4 to rotate clockwise together. When the drill barrel 4 rotates clockwise, the first bottom plate 51 rotates clockwise relative to the second bottom plate 52, thereby opening the first mud inlet hole. At this time, as the drill barrel 4 rotates clockwise, the soil is broken by the cutting teeth and enters the drill barrel 4 through the first mud inlet hole.

[0056] After the drill barrel 4 is filled with soil for the second time, the drill rod 2 first reverses and drives the drill barrel 4 to reverse through the pressure plate 61, causing the second bottom plate 52 to seal the mud inlet hole. Then, the drill rod 2 rises and drives the drill barrel 4 to rise to the ground through the pressure plate 61. After that, the power head 3 descends and pushes the pressure rod 65 downward. When the elastic telescopic block 32 abuts against the lower end face of the crossbar on the stop rod 43, the drill barrel 4 and the power head 3 lock. When the pressure rod 65 descends, it drives the connecting rod 531 to move downward together, thereby causing the first hook 532 and the second hook 53 to move downward. 3. Unlock, and then the first base plate 51 deflects downward. At this time, the lower end of the drill barrel 4 opens, and the soil slides out of the drill barrel 4 under the action of gravity. When the pressure rod 65 descends, the pressure rod 65 rotates under the action of the spiral groove 653 and the protrusion 624. When the pressure rod 65 rotates, it causes the push plate 651 to rotate and pushes the elastic telescopic block 64 out of the groove 621. Then the drill rod 2 drives the pressure plate 61 to move downward, pushing the soil in the sleeve 62 downward, so that the soil in the sleeve 62 and the drill barrel 4 are discharged from the lower end of the drill barrel 4.

[0057] After the drill barrel 4 has finished unloading the soil, the power head 3 and the drill rod 2 descend synchronously, causing the first base plate 51 to flip upward and reset. Then the power head 3 rises and resets, causing the elastic telescopic block 32 to disengage from the stop bar 43 on the drill barrel 4. After that, the compression spring is released, which drives the pressure rod 65 to move upward and reset. When the pressure rod 65 resets, the push plate 651 enters the clearance hole 626. Finally, the drill rod 2 drives the pressure plate 61 to move upward to complete the reset.

[0058] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A rotary drilling device for pile foundation construction, comprising a body, a drill rod mounted on the body, a power head mounted on the body, and a drill cylinder mounted at the lower end of the drill rod, wherein a base plate mechanism is provided at the bottom end of the drill cylinder, characterized in that, Also includes: The compaction mechanism includes a sleeve passing through the drill barrel and a pressure plate passing through the sleeve. The pressure plate is fixedly connected to the lower end of the drill rod. The drill barrel is sleeved on the sleeve and slides vertically on the sleeve. The pressure plate is provided with a clutch component one for locking the pressure plate and the drill barrel. The sleeve is provided with a clutch component two for locking the sleeve and the pressure plate or the drill barrel. The drill barrel is provided with a clutch component three for locking the drill barrel and the power head. After the drill barrel is filled with soil, the pressure plate is disconnected from the drill barrel. The pressure plate descends to compact the soil in the sleeve and drill barrel. Then the pressure plate is reset and locked with the drill barrel. The drill barrel continues to rotate and dig holes. When the drill barrel is unloading soil, the bottom plate mechanism is opened, and the clutch locks the drill barrel and the power head. Then the pressure plate is disconnected from the sleeve, and the sleeve is locked with the drill barrel. After that, the pressure plate descends to discharge the soil. The clutch component includes a boss on the pressure plate and a limiting groove on the inner circumferential wall of the drill barrel. The limiting groove consists of a horizontal section and a vertical section, and the boss is slidably installed in the limiting groove.

2. The rotary drilling device for pile foundation construction according to claim 1, characterized in that, The clutch component 2 includes an elastic telescopic block 1 set on the pressure plate, a pusher for retracting the elastic telescopic block 1 into the pressure plate, and a locking component 1 for locking the sleeve and the drill barrel. The elastic telescopic block 1 extends and retracts along the radial direction of the pressure plate. A groove is provided on the inner side wall of the sleeve. When the drill barrel unloads soil, the pusher pushes the elastic telescopic block 1 out of the groove.

3. The rotary drilling device for pile foundation construction according to claim 2, characterized in that, The pushing component includes a pressure rod passing through the sleeve, the upper end of the pressure rod extending beyond the upper end of the drill barrel, and a spiral groove formed on the pressure rod. A protrusion slidingly fitted in the spiral groove is provided on the sleeve. A push plate is provided on the pressure rod. An elastic element is provided between the pressure rod and the drill barrel to reset the pressure rod. When the drill barrel unloads soil, the power head descends, pushing the pressure rod down, thereby causing the push plate to rotate and push the elastic telescopic block out of the groove.

4. The rotary drilling device for pile foundation construction according to claim 3, characterized in that, The locking component includes a ring platform at the upper end of the drill barrel and a limiting block on the pressure rod. The pressure rod passes through the ring platform and the limiting block is located above the ring platform. A clearance hole communicating with the groove is provided on the sleeve. The clearance hole is used to allow the push plate to pass through. A sector-shaped groove penetrating the outer side is provided on the outer circumferential wall of the pressure plate. A slider is slidably installed in the sector-shaped groove along the circumferential direction of the pressure plate. An elastic telescopic block is provided on the slider.

5. A rotary drilling device for pile foundation construction according to claim 2, characterized in that, The inner circumferential wall of the sleeve is provided with a limiting groove 2. The upper end of the limiting groove 2 is connected to the groove, and the lower end of the limiting groove 2 is provided with a baffle. After the elastic telescopic block 1 exits from the groove, it slides vertically in the limiting groove 2.

6. The rotary drilling device for pile foundation construction according to claim 1, characterized in that, The clutch component three includes an elastic telescopic block two installed on the power head, and a stop bar installed at the upper end of the drill barrel. When the drill barrel is unloading soil, the power head presses down to move the elastic telescopic block two below the stop bar and engage the elastic telescopic block two with the stop bar, thereby locking the drill barrel and the power head.

7. The rotary drilling device for pile foundation construction according to claim 1, characterized in that, The lower end of the sleeve is provided with a wedge-shaped surface.

8. A rotary drilling device for pile foundation construction according to claim 4, characterized in that, The drill barrel is also provided with a second locking component for locking the base plate mechanism to the drill barrel. When the pressure rod descends relative to the drill barrel, the base plate mechanism is unlocked from the drill barrel.

9. A rotary drilling device for pile foundation construction according to claim 8, characterized in that, The second locking component includes a connecting rod rotatably mounted on the lower end of the pressure rod and a first hook hinged to the drill barrel. The base plate mechanism is provided with a second hook for engaging with the first hook. The lower end of the connecting rod is slidably engaged with the first hook. When the pressure rod descends relative to the drill barrel, it pushes the first hook to rotate, thereby unlocking the first hook from the second hook.

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