Drilling device for wharf construction and its rotary drilling bit

Abstract

The present application relates to a drilling device for wharf construction and its rotary drilling bit. The drilling device includes a rotary drilling bit, a guiding mechanism and a traction mechanism. The rotary drilling bit includes a mounting seat, a power driving assembly, a rotary drilling cylinder and a rotary drilling head. The traction mechanism guides the guiding mechanism to extend, so that the rotary drilling bit moves to the current drilling depth. The power source on the mounting seat is started to drive the transmission unit to drive the rotary drilling cylinder to rotate relative to the mounting seat through a transmission fitting, driving the rotary drilling head to rotate, so that the excavated soil and rock enter the rotary drilling cavity. Then, the traction mechanism guides the guiding mechanism to move and shorten, so that the rotary drilling bit is removed from the drill hole, and the rotary drilling head is opened to realize soil discharge. Since the power source is arranged on the rotary drilling cylinder through the mounting seat, the power transmission does not need to pass through the drill pipe. In soft soil layers, the drilling of the rotary drilling bit is more reliable and stable, and the stress on the hole wall will not be uneven due to the elastic deformation and torque attenuation of the drill pipe, ensuring the reliability of the drill hole.

Description

Technical Field

[0001] The present application relates to the technical field of wharf construction, and in particular to a drilling device for wharf construction and its rotary drilling bit. Background Art

[0002] For the wharf construction area, it is generally in the waterway interaction area, and the geological conditions are generally silt, silty soil, sand layer and clay layer, all of which belong to soft soil layers. Therefore, the stability of drilling construction on such soil is particularly important. The traditional drilling rig generally drives the drill pipe that is continuously extended in the drill hole to rotate through a ground operation machine, so as to drive the drill bit located at the end of the drill pipe to complete the drilling operation. Since the power needs to be transmitted through the continuously extended drill pipe, when it is transmitted to the drill bit position, with the increase of the drilling depth, the elastic deformation and torque attenuation of the drill pipe are significant. In soft soil layers, the deflection of the drill pipe will cause the drill bit to rotate eccentrically, exacerbating the uneven force on the hole wall and causing local hole enlargement or deviation. When the drilling axis deviates from the designed trajectory, if forced hole repair is carried out and the position of the drill bit is adjusted repeatedly, it will further disturb the surrounding soil and increase the risk of collapse.

[0003] In the prior art, Patent CN2926475Y discloses a hydraulic spherical impact drill rock machine with a spherical drill bit, which uses an internal power to drive the spherical drill bit to rotate. Although the problem of drill pipe transmission is solved, the spherical drill bit structure is prone to floating drill phenomenon in soft soil layers, and the impact mechanism will cause disturbance damage to the hole wall. Patent CN201250609Y discloses an internal power negative pressure circulation rotary impact combined drill bit, and the power motor is arranged in the power device sealing box on the drill bit. Its planetary drill bit structure is complex and it is difficult to form an effective cutting force in soft strata.

[0004] Therefore, the above prior art is difficult to be applicable to soft soil layers, with insufficient construction stability, and it is difficult to meet the requirements of hole formation quality and construction stability for wharf soft soil layer drilling construction. Summary of the Invention

[0005] Based on this, it is necessary to provide a drilling device for wharf construction and its rotary drilling bit that can improve the hole formation quality and construction stability of wharf drilling construction in view of the above problems.

[0006] A drilling device for wharf construction and its rotary drilling bit. The rotary drilling bit includes a mounting seat, a power drive assembly, a rotary drilling barrel and a rotary drilling head. The power drive assembly is arranged on the mounting seat, and the power drive assembly includes a power source and a transmission unit. A rotary drilling cavity is formed in the rotary drilling barrel. One end of the rotary drilling barrel is rotatably mounted on the mounting seat, and a transmission fitting is formed at one end of the rotary drilling barrel. The transmission fitting is in transmission cooperation with the transmission unit. The power source is used to drive the transmission unit to drive the rotary drilling barrel to rotate through the transmission fitting. The other end of the rotary drilling barrel is open to form a soil discharge port, and the rotary drilling head is coverably arranged on the soil discharge port.

[0007] In one embodiment, the mounting seat includes a mounting shell and a mounting plate located below the mounting shell. An installation cavity is formed in the mounting shell. The power source is arranged in the installation cavity. The transmission fitting includes an annular rack. The annular rack is arranged on the inner wall of one end of the rotary drilling barrel. The annular rack is installed between the mounting shell and the mounting plate. The transmission unit is arranged in the annular rack and between the mounting shell and the mounting plate. The transmission unit includes a driving gear and at least two driven gears. Each of the driven gears is arranged at intervals around the driving gear so that the driving gear meshes with the annular rack through each of the driven gears. The power source is used to drive the driving gear to rotate.

[0008] In one embodiment, the transmission fitting further includes a plurality of balls. The side of the annular rack facing the mounting shell and / or the side of the annular rack facing the mounting plate is provided with rolling grooves. The plurality of balls are arranged in the rolling grooves around the rotation axis of the rotary drilling barrel, and a part of the balls protrudes from the rolling grooves. The thickness of the annular rack is less than the gap between the mounting shell and the mounting plate.

[0009] In one embodiment, the rotary drilling bit further includes a cleaning assembly. The cleaning assembly includes a cleaning member, a pressing rod and a reset elastic member. The cleaning member is arranged below the mounting plate. The outer wall of the cleaning member is in contact with the inner wall of the rotary drilling barrel. One end of the pressing rod is connected to the cleaning member, and the other end sequentially passes through the mounting plate, the gap between two adjacent driven gears and the mounting shell and extends out. The reset elastic member is arranged on the pressing rod. The reset elastic member is used to provide an upward reset elastic force for the pressing rod so that the cleaning member can cover the mounting plate.

[0010] In one embodiment, the cleaning member includes at least two cleaning blocks. There is a gap between each of the cleaning blocks, and adjacent two of the cleaning blocks are connected by the connecting member. The outer walls of each of the cleaning blocks are in contact with the inner wall of the rotary drilling cylinder. The cleaning block is an elastically deformable structure. A fold is formed on the lower surface of the cleaning block, and the upper surface of the cleaning block slopes downward along the direction towards the inner wall of the rotary drilling cylinder.

[0011] In one embodiment, the rotary head is rotatably arranged on the rotary drilling cylinder, and a clamping member is arranged on the rotary head. The rotary drill bit further includes a locking assembly, and the locking assembly includes a hook member, a rotating member, a locking and resetting member, and an unlocking driving member. The hook member is arranged on the rotating member. The rotating member is rotatably arranged in the rotary cavity through the locking and resetting member and is located near the soil discharge port, so that the hook member can be engaged with the clamping member. The unlocking driving member is movably arranged on the mounting seat, and one end of the unlocking driving member penetrates into the rotary cavity. The unlocking driving member can push the rotating member to rotate so that the hook member is disengaged from the clamping member.

[0012] In one embodiment, the pressure rod is hollow inside. The unlocking driving member includes an unlocking rod. The unlocking rod is arranged inside the pressure rod and can move inside the pressure rod. One end of the unlocking rod can extend out of the cleaning member, and the other end can extend out of the pressure rod.

[0013] In one embodiment, the rotating member includes a rotating portion and a pushing portion connected to the rotating portion. The hook member is connected to a position of the rotating portion far from the pushing portion. The surface of the pushing portion facing the hook member side is the first pushing surface, and the other opposite side surface is the second pushing surface. When the hook member is in the locked state, the first pushing surface slopes downward along the direction towards the hook member, and the inclination direction of the second pushing surface is the same as that of the first pushing surface.

[0014] A drilling device for wharf construction, the drilling device includes the rotary drill bit, a guiding mechanism, and a traction mechanism as described above. The guiding mechanism includes a plurality of sleeve rods. The plurality of sleeve rods are sleeved with each other and can move relatively. One end of the innermost sleeve rod is connected to the mounting seat. The traction mechanism is used to traction the innermost sleeve rod to move.

[0015] In one embodiment, the drilling device further includes a positioning mechanism. The positioning mechanism includes a positioning cylinder and a clamping assembly. A positioning hole is formed inside the positioning cylinder. The clamping assembly is arranged inside the positioning hole. The guiding mechanism is arranged inside the positioning hole. The clamping assembly can clamp the outermost sleeve rod. An annular limiting bottom plate is arranged at the bottom end of the positioning cylinder.

[0016] Compared with the prior art, the above-mentioned drilling device for wharf construction and its rotary drilling bit have at least the following beneficial effects: The traction mechanism pulls the innermost sleeve rod to move, so that the respective sleeve rods move relatively and extend, enabling the rotary drilling bit to move to the current drilling depth. The power source on the mounting base is started to drive the transmission unit to drive the rotary drilling cylinder to rotate relative to the mounting base through the transmission fitting, and then drive the rotary drilling head to rotate, so that the excavated soil and rock enter the rotary drilling cavity. When the rotary drilling cavity is filled with soil and rock, the traction mechanism pulls the respective sleeve rods to move relatively and shorten, so that the rotary drilling bit is removed from the drill hole, and by opening the rotary drilling head, the soil and rock are discharged through the soil discharge port. Since the power source is arranged on the rotary drilling cylinder through the mounting base, the transmission of power does not need to pass through the drill pipe. In the soft soil layer of the wharf construction area, the drilling of the rotary drilling bit is more reliable and stable, and problems such as uneven stress on the hole wall caused by the elastic deformation and torque attenuation of the drill pipe, resulting in local hole enlargement or deviation, will not occur, ensuring the reliability of the drill hole and reducing the risk of hole collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments and descriptions thereof of this application are used to explain this application and do not constitute an improper limitation of this application.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] In addition, the drawings are not drawn to a scale of 1:1, and the relative sizes of the respective elements are only drawn exemplarily in the drawings and not necessarily according to the actual scale.

[0020] Figure 1 It is a schematic structural diagram of a drilling device for wharf construction in an embodiment.

[0021] Figure 2 For Figure 1 the structural schematic diagrams of the guiding mechanism, positioning mechanism and rotary drilling bit in

[0022] Figure 3 For Figure 2 the structural schematic diagram of the rotary drilling bit in the cleaning state in

[0023] Figure 4 For Figure 2 the structural schematic diagram of the rotary drilling bit in the rotary drilling state in

[0024] Figure 5 For Figure 4Cross-sectional view taken along line A-A in [the figure].

[0025] Figure 6 For Figure 4 Enlarged view at position B in [the figure].

[0026] Figure 7 For Figure 4 Bottom view of the cleaning assembly in [the figure].

[0027] Figure 8 For Figure 2 Enlarged view at position C in [the figure].

[0028] Explanation of reference numerals:

[0029] Drilling device 1; Rotary drilling bit 10; Mounting base 100; Mounting shell 110; Mounting cavity 112; Mounting plate 120; Power driving assembly 200; Power source 210; Transmission unit 220; Driving gear 222; Driven gear 224; Rotary drilling cylinder 300; Rotary drilling cavity 310; Transmission fitting 320; Ring rack 322; Ball 324; Rolling groove 326; Rotary drilling head 400; Clamping part 410; Cleaning assembly 500; Cleaning part 510; Cleaning block 512; Connecting part 514; Pressing rod 520; Reset elastic part 530; Locking component 600; Hook part 610; Rotating part 620; Rotating portion 622; Pushing portion 624; First pushing surface 625; Unlocking driving part 630; Guide mechanism 20; Sleeve rod 202; Traction mechanism 30; Positioning mechanism 40; Positioning cylinder 402; Positioning hole 4021; Avoidance hole 4022; Elastic extrusion part 4023; Ring-shaped limiting bottom plate 403; Clamping assembly 404; Clamping seat 4041; Claw 4042; Clamping reset part 4043; Hydraulic cavity 4044; Piston rod 4045; Piston body 4046. Detailed implementation manners

[0030] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0031] Refer to Figure 1 And Figure 2, the drilling device 1 for wharf construction in an embodiment of the present application can at least improve the hole forming quality of drilling and enhance the reliability of drilling in the wharf construction area. Specifically, the drilling device 1 for wharf construction includes a rotary drill bit 10, a guiding mechanism 20, and a traction mechanism 30. The rotary drill bit 10 is connected to the guiding mechanism 20, and the traction mechanism 30 pulls the guiding mechanism 20 to extend or shorten, so as to facilitate the lowering or removal of the rotary drill bit 10 in the drill hole.

[0032] Refer to together Figure 3 and Figure 4 , specifically, the rotary drill bit 10 includes a mounting seat 100, a power driving assembly 200, a rotary drum 300, and a rotary head 400. The power driving assembly 200 is arranged on the mounting seat 100. The power driving assembly 200 includes a power source 210 and a transmission unit 220. A rotary cavity 310 is formed in the rotary drum 300. One end of the rotary drum 300 is rotatably mounted on the mounting seat 100, and a transmission fitting 320 is formed at one end of the rotary drum 300. The transmission fitting 320 is in transmission cooperation with the transmission unit 220. The power source 210 is used to drive the transmission unit 220 to drive the rotary drum 300 to rotate through the transmission fitting 320. The other end of the rotary drum 300 is open to form a soil discharge port 330, and the rotary head 400 is coverably arranged on the soil discharge port 330.

[0033] In this embodiment, the guiding mechanism 20 includes a plurality of sleeve rods 202. The plurality of sleeve rods 202 are sleeved with each other and can move relatively up and down. One end of the innermost sleeve rod 202 is connected to the mounting seat 100, and the traction mechanism 30 is used to pull the innermost sleeve rod 202 to move.

[0034] During construction, the traction mechanism 30 pulls the innermost sleeve rod 202 to move, so that each sleeve rod 202 moves relatively and extends, enabling the rotary drilling bit 10 to move to the current drilling depth. The power source 210 on the mounting base 100 is started to drive the transmission unit 220 to drive the rotary drilling cylinder 300 to rotate relative to the mounting base 100 through the transmission fitting 320, and then drive the rotary drilling head 400 to rotate, so that the excavated soil and rock enter the rotary drilling cavity 310. When the rotary drilling cavity 310 is filled with soil and rock, the traction mechanism 30 pulls each sleeve rod 202 to move relatively and shorten, so that the rotary drilling bit 10 is removed from the drill hole, and by opening the rotary drilling head 400, the soil and rock are discharged through the soil discharge port 330. Since the power source 210 is arranged on the rotary drilling cylinder 300 through the mounting base 100, the transmission of power does not need to pass through the drill pipe. In the soft soil layer of the wharf construction area, the drilling of the rotary drilling bit 10 is more reliable and stable, and it will not cause uneven stress on the hole wall due to the elastic deformation and torque attenuation of the drill pipe, resulting in problems such as local hole enlargement or deviation, ensuring the reliability of the drill hole. When the stability of the drill hole can be guaranteed, the accuracy of the drill hole will also be correspondingly improved, thereby reducing the number of hole repair times, reducing the disturbance to the surrounding soil, and reducing the risk of hole collapse.

[0035] Refer to Figure 4 and Figure 5 In one embodiment, the mounting base 100 includes a mounting shell 110 and a mounting plate 120 located below the mounting shell 110. An installation cavity 112 is formed in the mounting shell 110, and the power source 210 is arranged in the installation cavity 112. The transmission fitting 320 includes an annular rack 322. The annular rack 322 is arranged on the inner wall of one end of the rotary drilling cylinder 300, and the annular rack 322 is installed between the mounting shell 110 and the mounting plate 120. The transmission unit 220 is arranged in the annular rack 322 and is located between the mounting shell 110 and the mounting plate 120. The transmission unit 220 includes a driving gear 222 and at least two driven gears 224. Each driven gear 224 is arranged at intervals around the driving gear 222, so that the driving gear 222 meshes with the annular rack 322 through each driven gear 224, and the power source 210 is used to drive the driving gear 222 to rotate. When drilling is required, the power source 210 is started. The power source 210 drives the driving gear 222 to drive the driven gears 224 to rotate, and then drives the rotary drilling cylinder 300 to rotate relative to the mounting base 100 through the annular rack 322. Since the annular rack 322 is arranged on the inner wall of the rotary drilling cylinder 300 and is located between the mounting shell 110 and the mounting plate 120, and the mounting plate 120 is connected to the mounting shell 110, the stable connection between the rotary drilling cylinder 300 and the mounting base 100 is realized.

[0036] In this embodiment, the power source 210 can be a hydraulic motor or an electric motor. In other embodiments, the power source 210 can also be other power components that can drive the driving gear 222 to rotate.

[0037] In this embodiment, the mounting plate 120 is mounted on the side of the ring rack 322 facing away from the mounting shell 110 on one side of the discharge port 330. The mounting shell 110 is a cylindrical shell, and a part of the mounting shell 110 is disposed in the rotary excavation cavity 310 of the rotary excavation cylinder 300. The outer wall of the mounting shell 110 is in sliding contact with the inner wall of the rotary excavation cylinder 300. The mounting shell 110 can provide support for the rotation of the rotary excavation cylinder 300 and improve the stability of the rotation of the rotary excavation cylinder 300.

[0038] In one embodiment, the transmission unit 220 further includes a fixed shaft 226. A first fixing hole is formed in the bottom wall of the mounting shell 110, and a second fixing hole is formed in the mounting plate 120. One end of the fixed shaft 226 sequentially passes through the first fixing hole, the driven gear 224, and the second fixing hole. Opposite ends of the fixed shaft 226 are respectively limited on the mounting shell 110 and the mounting plate 120. Specifically, limiting plates can be respectively provided at opposite ends of the fixed shaft 226. By providing the fixed shaft 226, not only can the driven gear 224 be fixed, but also the fixed connection between the mounting shell 110 and the mounting plate 120 can be realized. In other embodiments, the fixed shaft 226 can also be a screw, and the screw passes through the first fixing hole and the second fixing hole and is locked by a nut.

[0039] In this embodiment, the number of driven gears 224 is three, and the three driven gears 224 are arranged at intervals. The number of fixed shafts 226 is the same as the number of driven gears 224, and each driven gear 224 is connected by a fixed shaft 226.

[0040] In other embodiments, the transmission unit 220 can also be other structures capable of driving the rotary excavation cylinder 300 to rotate.

[0041] In one embodiment, the transmission fitting 320 further includes a plurality of balls 324. A rolling groove 326 is formed on one side of the ring rack 322 facing the mounting shell 110 and / or on one side of the ring rack 322 facing the mounting plate 120. The plurality of balls 324 are arranged in the rolling groove 326 around the rotation axis of the rotary excavation cylinder 300, and a part of the balls 324 protrudes from the rolling groove 326. The thickness of the ring rack 322 is less than the gap between the mounting shell 110 and the mounting plate 120. When the rotary excavation cylinder 300 rotates, by providing the plurality of balls 324, the rotation friction of the rotary excavation cylinder 300 can be reduced and the rotation efficiency can be improved.

[0042] In this embodiment, the rolling groove 326 is formed on the side of the annular rack 322 facing the mounting shell 110. Specifically, an annular mating groove is formed on the side of the mounting shell 110 facing the annular rack 322, and the ball 324 can roll in the annular mating groove. When the rotary drilling cylinder 300 rotates to drive the rotary drilling head 400 to perform drilling operations, the rotary drilling cylinder 300 is subjected to an upward thrust force. By arranging the ball 324 on the side of the annular rack 322 facing the mounting shell 110, the rotational friction of the rotary drilling cylinder 300 can be effectively reduced, and the rotational efficiency can be improved.

[0043] In one embodiment, an annular elastic shock-absorbing member (not shown in the figure) may be further provided on the bottom wall of the rolling groove 326. Under the action of the annular elastic shock-absorbing member, the ball 324 abuts against the bottom wall of the mounting shell 110. Since the rotary drill bit 10 is affected by vibration during drilling operations, by arranging the annular elastic shock-absorbing member, the seismic resistance of the rotary drilling cylinder 300 can be improved, and the drilling reliability can be further enhanced. For example, the annular elastic shock-absorbing member may include a shock-absorbing spring and an annular plate. The shock-absorbing spring is arranged on the side of the annular plate facing away from the ball 324, and the ball 324 is arranged on the annular plate. In other embodiments, shock-absorbing members with other structural forms may also be provided. Of course, the shock-absorbing member may also be omitted.

[0044] Refer to Figure 3 、 Figure 4 、 Figure 6 and Figure 7 As shown in

[0045] In one embodiment, the rotary drill bit 10 further includes a cleaning assembly 500. The cleaning assembly 500 includes a cleaning member 510, a pressing rod 520, and a reset elastic member 530. The cleaning member 510 is arranged below the mounting plate 120. The outer wall of the cleaning member 510 is in contact with the inner wall of the rotary drilling cylinder 300. One end of the pressing rod 520 is connected to the cleaning member 510, and the other end sequentially passes through the mounting plate 120, the gap between two adjacent driven gears 224, and the mounting shell 110 and extends out. The reset elastic member 530 is arranged on the pressing rod 520. The reset elastic member 530 is used to provide an upward reset elastic force for the pressing rod 520 so that the cleaning member 510 can cover the mounting plate 120. Specifically, the reset elastic member 530 is located inside the mounting shell 110. Since the rotary drill bit 10 is used in a dock construction area where there is a lot of silt soil, when discharging the muck in the rotary cavity 310, the phenomenon of soil sticking to the wall is likely to occur. During the process of lifting the rotary drill bit 10, the pressing rod 520 is pressed, so that the cleaning member 510 moves downward along the inner wall of the rotary cavity 310 in the rotary drilling cylinder 300, facilitating scraping the soil on the inner wall of the rotary cavity 310 and ensuring the subsequent drilling efficiency. At the same time, when the cleaning member 510 is reset and covers the mounting plate 120, it can cover the connection seam between the mounting plate 120 and the inner wall of the rotary drilling cylinder 300, preventing soil from entering between the mounting plate 120 and the mounting shell 110 during the drilling process.Specifically, the cleaning member 510 includes at least two cleaning blocks 512. There is a gap between each of the cleaning blocks 512 and they are connected by a connecting member 514. Moreover, the outer walls of each of the cleaning blocks 512 are in contact with the inner wall of the rotary drilling cylinder 300. By providing at least two cleaning blocks 512, it is convenient to form a gap for the soil above the cleaning blocks 512 to fall. Further, the cleaning block 512 is in an arc-shaped block structure.

[0046] In this embodiment, the cleaning block 512 is a structure that can elastically deform. Wrinkles are formed on the lower surface of the cleaning block 512. When it is necessary to clean the inner wall of the rotary drilling cavity 310, the cleaning block 512 moves downward. Under the action of the upward frictional force, the lower surface of the cleaning block 512 can be unfolded to improve the cleaning effect on the inner wall of the rotary drilling cylinder 300. For example, the elastic deformation amount of the cleaning block 512 is greater than or equal to 1 cm.

[0047] In this embodiment, the upper surface of the cleaning block 512 slopes downward along the direction towards the inner wall of the rotary drilling cylinder 300, reducing the possibility of soil piling up on the upper surface of the cleaning block 512. Moreover, when the cleaning block 512 moves upward to reset, under the action of the downward frictional force, the possibility of the cleaning block 512 bringing soil to the upper surface of the cleaning block 512 is reduced.

[0048] In this embodiment, the number of the pressure rods 520 is three. Each pressure rod 520 can pass through two adjacent driven gears 224, and the respective pressure rods 520 are arranged at intervals around the rotation axis of the rotary drilling cylinder 300.

[0049] Refer to Figure 3 、 Figure 4 and Figure 8 In one embodiment, the rotary head 400 is rotatably provided on the rotary drilling cylinder 300, and a clamping member 410 is provided on the rotary head 400. The rotary drill bit 10 further includes a locking assembly 600. The locking assembly 600 includes a hook member 610, a rotating member 620, a locking and resetting member (not shown in the figure), and an unlocking driving member 630. The hook member 610 is provided on the rotating member 620. The rotating member 620 is rotatably provided in the rotary drilling cavity 310 by the locking and resetting member and is located near the soil discharge port 330, so that the hook member 610 can be clamped with the clamping member 410. The unlocking driving member 630 is movably provided on the mounting base 100, and one end of the unlocking driving member 630 penetrates into the rotary drilling cavity 310. The unlocking driving member 630 can push the rotating member 620 to rotate so that the hook member 610 is disengaged from the clamping member 410.

[0050] During the drilling process, the unlocking driving member 630 does not act on the rotating member 620. Under the action of the locking reset member, the hook member 610 remains engaged with the engaging member 410, thereby keeping the rotary drilling head 400 stably covering the rotary drilling cylinder 300. When soil discharge is required, the unlocking driving member 630 is driven to push the rotating member 620 to rotate so that the hook member 610 is disengaged from the engaging member 410. Under the action of the gravity of the soil in the rotary drilling cylinder 300, the rotary drilling head 400 is opened to achieve soil discharge.

[0051] In this embodiment, the pressure rod 520 is hollow inside. The unlocking driving member 630 includes an unlocking rod that is inserted into the pressure rod 520 and can move within the pressure rod 520. One end of the unlocking rod can extend out of the cleaning member 510, and the other end can extend out of the pressure rod 520. By inserting the unlocking rod into the pressure rod 520, the occupation of the installation space inside the rotary drilling cylinder 300 can be reduced. When the pressure rod 520 is pressed down to clean the inner wall of the rotary drilling cylinder 300, the unlocking rod can be simultaneously pressed down to unlock the hook member 610 and the engaging member 410, so that the rotary drilling head 400 is opened, achieving the opening of the rotary drilling head 400 while cleaning the cylinder wall to more stably discharge the soil in the rotary drilling cylinder 300.

[0052] Furthermore, the unlocking driving member 630 further includes an unlocking return spring. The unlocking return spring is disposed on the unlocking rod and is used to provide an upward elastic force for the unlocking rod. When not driven by an external force, the unlocking rod does not act on the rotating member 620, ensuring that the rotating member 620 drives the hook member 610 to remain engaged with the engaging member 410.

[0053] In one embodiment, the rotating member 620 includes a rotating portion 622 and a pushing portion 624 connected to the rotating portion 622. The hook member 610 is connected to a position of the rotating portion 622 away from the pushing portion 624. The surface of the pushing portion 624 facing the hook member 610 is the first pushing surface 625, and the other opposite side surface is the second pushing surface 626. When the hook member 610 is in the locked state, the first pushing surface 625 is inclined downward in the direction towards the hook member 610, and the inclination direction of the second pushing surface 626 is the same as that of the first pushing surface 625. During the drilling process, the soil will gradually enter the rotary drilling cavity 310 from one side of the second pushing surface 626. Then, the soil will push against the second pushing surface 626 during continuous rotary drilling, which can ensure that the rotating member 620 does not rotate during the rotary drilling process of drilling, ensuring the reliability of the locking coverage of the rotary drilling head 400. In one implementation state, during the rotary drilling process, the soil will also push the unlocking rod upward, so that the unlocking rod located in the rotary drilling cavity 310 will not affect the rotary drilling. When the rotary drilling head 400 needs to be opened, the unlocking rod abuts against the first pushing surface 625 and pushes the rotating member 620 to rotate, realizing the unlocking of the hook member 610 and the engaging member 410.

[0054] In this embodiment, a drilling hole is formed in the rotary drilling head 400, and the drilling hole communicates with the rotary drilling cavity 310. The soil generated by drilling can enter the rotary drilling cavity 310 through the drilling hole. Specifically, the drilling hole is located on one side of the second pushing surface 626, and the soil drilled through the drilling hole can be pushed against the second pushing surface 626 to maintain the stable engagement between the engaging member 610 and the engaging part 410.

[0055] In this embodiment, the engaging member 610 and the connecting member 514 are integrally formed structures, which improves the structural stability. In other embodiments, the engaging member 610 and the connecting member 514 are split structures.

[0056] Refer to Figure 1 、 Figure 2 and Figure 8 In one embodiment, the drilling device 1 further includes a positioning mechanism 40. The positioning mechanism 40 includes a positioning cylinder 402. A positioning hole 4021 is formed in the positioning cylinder 402. The guiding mechanism 20 is inserted into the positioning hole 4021. An annular limiting bottom plate 403 is provided at the bottom end of the positioning cylinder 402. During drilling, the annular limiting bottom plate 403 of the positioning cylinder 402 positions the position of the drilling area to ensure the verticality of drilling. When the guiding mechanism 20 pulls the rotary drilling bit 10 up to below the annular limiting bottom plate 403, the pressing rod 520 can abut against the annular limiting bottom plate 403. By using the annular limiting bottom plate 403 to abut against the pressing rod 520, the cleaning member 510 is further pushed to move within the rotary drilling cylinder 300. At the same time, the annular limiting bottom plate 403 can further press against the unlocking rod to realize the unlocking between the engaging member 610 and the engaging part 410.

[0057] In one embodiment, an avoidance hole 4022 is formed at the bottom end of the positioning cylinder 402. An elastic pressing member 4023 is arranged in the avoidance hole 4022. The unlocking rod can be inserted into the avoidance hole 4022 and abut against the elastic pressing member 4023. When the pressing rod 520 abuts against the annular limiting bottom plate 403, the unlocking rod is inserted into the avoidance hole 4022 and abuts against the elastic pressing member 4023. Under the action of the elastic pressing member 4023, the unlocking rod pushes the engaging member 610 to rotate to complete the unlocking. As Figure 3 shown, at this time, the rotary drilling bit 10 continues to move up, the pressing rod 520 pushes the cleaning member 510 to continue to move down, and at this time, the unlocking rod continuously presses against the elastic pressing member 4023.

[0058] Refer to Figure 1 In one embodiment, the positioning mechanism 40 further includes a clamping assembly 404. The clamping assembly 404 is arranged in the positioning hole 4021. The clamping assembly 404 can clamp the outermost sleeve rod 202. By providing the clamping assembly 404, the guiding stability of the guiding mechanism 20 can be improved, and thus the drilling accuracy can be improved.

[0059] Specifically, the clamping assembly 404 includes a clamping seat 4041, a clamping driving member (not shown in the figure), at least two clamping jaws 4042 and at least two clamping reset members 4043. The clamping seat 4041 is disposed on the inner upper part of the positioning cylinder 402. A clamping space is formed in the clamping seat 4041. Each clamping jaw 4042 is arranged at intervals around the axis of the positioning cylinder 402 on the inner wall of the clamping space and is movable relative to the clamping seat 4041. The clamping reset member 4043 is used to provide a reset force for the clamping jaw 4042 to move away from the guiding mechanism 20. The clamping driving member is disposed on the positioning cylinder 402 and is used to provide a thrust for the clamping jaw 4042 to move in the direction of the guiding mechanism 20.

[0060] In one embodiment, a hydraulic cavity 4044 is further formed in the clamping seat 4041. A piston rod 4045 is connected to one end of each clamping jaw 4042 facing away from the clamping space. A piston body 4046 is connected to one end of the piston rod 4045 facing away from the clamping jaw 4042. The piston body 4046 is movably disposed in the hydraulic cavity 4044. The piston body 4046 is in sealed contact with the inner wall of the hydraulic cavity 4044. The clamping reset member 4043 is sleeved on the piston rod 4045 and is used to provide an elastic force for the piston body 4046 in the direction away from the guiding mechanism 20. The clamping driving member is used to input or output pressure liquid into the hydraulic cavity 4044.

[0061] In other embodiments, the clamping assembly 404 may also be other structures capable of clamping the guiding mechanism 20.

[0062] For the drilling device 1 for wharf construction described above, during drilling construction, the traction mechanism 30 traction the innermost sleeve rod 202 to move, so that the sleeve rods 202 move and extend relative to each other, enabling the rotary drilling bit 10 to move to the current drilling depth. The power source 210 on the mounting base 100 is started to drive the transmission unit 220 to drive the rotary drilling cylinder 300 to rotate relative to the mounting base 100 through the transmission fitting 320, and then drive the rotary drilling head 400 to rotate, so that the excavated soil and rock enter the rotary drilling cavity 310.

[0063] After the rotary drilling cavity 310 is filled with muck, the traction mechanism 30 pulls each sleeve rod 202 to shorten relative to the movement, so that the rotary drilling bit 10 is moved out of the drilling hole. The traction mechanism 30 pulls and guides the guiding mechanism 20 to drive the rotary drilling bit 10 to continue to move, so that the unlocking rod is inserted into the avoidance hole 4022 and abuts against the elastic extrusion member 4023, and the pressing rod 520 abuts against the annular limiting bottom plate 403 on the positioning cylinder 402. Continuing to move, under the action of the elastic extrusion member 4023, the unlocking rod pushes the hook member 610 to unlock from the clamping member 410, the rotary drilling head 400 is opened, and the pressing rod 520 pushes the cleaning member 510 to move downward in the rotary drilling cylinder 300 to clean the cylinder wall. When the rotary drilling bit 10 is far away from the positioning cylinder 402, under the action of the locking and resetting member, the hook member 610 and the clamping member 410 are locked and reset, and under the action of the reset elastic member 530, the cleaning member 510 is reset. The above drilling device 1 can effectively adapt to the soft soil layer in the wharf area and can effectively improve the drill bit efficiency and drilling accuracy.

[0064] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0065] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, if there is a term "plurality", the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0066] In the present application, unless otherwise clearly specified and limited, if there are terms such as "install", "connect", "install", "fix", etc., these terms should be understood in a broad sense. For example, it can be a fixed installation, a detachable installation, or integrated; it can be a mechanical installation or an electrical installation; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0067] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0068] The above-described embodiments only express several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A rotary drilling bit for a drilling device used in wharf construction, characterized in that, Comprising: A mounting base, including a mounting shell and a mounting plate located below the mounting shell, with a mounting cavity formed inside the mounting shell; A power driving assembly, including a power source and a transmission unit, the power source being arranged inside the mounting cavity; A rotary drilling cylinder, with a rotary drilling cavity formed inside, and a transmission fitting formed at one end of the rotary drilling cylinder. The transmission fitting includes an annular rack arranged on the inner wall of one end of the rotary drilling cylinder. The annular rack is installed between the mounting shell and the mounting plate. The transmission unit is arranged inside the annular rack and between the mounting shell and the mounting plate. The transmission unit includes a driving gear and at least two driven gears arranged at intervals around the driving gear. The driving gear meshes with the annular rack through each driven gear. The power source is used to drive the driving gear to rotate so as to drive the rotary drilling cylinder to rotate; A rotary drilling head. The other end of the rotary drilling cylinder is open to form a soil discharge port. The rotary drilling head is rotatably arranged on the rotary drilling cylinder. A clamping member is arranged on the rotary drilling head. The rotary drilling bit further includes a locking assembly. The locking assembly includes a hook member, a rotating member, a locking and resetting member, and an unlocking driving member. The rotating member is rotatably arranged inside the rotary drilling cavity through the locking and resetting member and is located near the soil discharge port; The rotating member includes a rotating portion and a pushing portion connected to the rotating portion. The hook member is connected to the position of the rotating portion away from the pushing portion. The surface of the pushing portion facing the hook member side is the first pushing surface, and the other opposite side surface is the second pushing surface; The hook member is clamped with the clamping member in the locked state. The first pushing surface slopes downward in the direction towards the hook member, and the inclination direction of the second pushing surface is the same as that of the first pushing surface; The unlocking driving member is movably arranged on the mounting base, and one end of the unlocking driving member penetrates into the rotary drilling cavity. The unlocking driving member can push the rotating member to rotate so that the hook member is disengaged from the clamping member; And A cleaning assembly, including a cleaning member, a pressing rod, and a reset elastic member. The cleaning member is arranged below the mounting plate. The outer wall of the cleaning member is attached to the inner wall of the rotary drilling cylinder. One end of the pressing rod is connected to the cleaning member, and the other end sequentially passes through the mounting plate, the gap between two adjacent driven gears, and the mounting shell and extends out. The reset elastic member is arranged on the pressing rod. The reset elastic member is used to provide an upward reset elastic force for the pressing rod so that the cleaning member can cover the mounting plate.

2. The rotary drilling bit according to claim 1, characterized in that, The transmission fitting further includes a plurality of balls. A rolling groove is formed on the side of the annular rack facing the mounting shell and / or a rolling groove is formed on the side of the annular rack facing the mounting plate. The plurality of balls are arranged in the rolling groove around the rotation axis of the rotary drilling cylinder, and a part of the balls protrudes from the rolling groove. The thickness of the annular rack is less than the gap between the mounting shell and the mounting plate.

3. The rotary drilling bit according to claim 1, characterized in that, The number of the pressing rods is three. Each pressing rod correspondingly passes through two adjacent driven gears, and the respective pressing rods are arranged at intervals around the rotation axis of the rotary drilling cylinder.

4. The rotary drilling bit according to claim 1, characterized in that, The cleaning member includes at least two cleaning blocks. There is a gap between the respective cleaning blocks, and two adjacent cleaning blocks are connected by a connecting member. The outer walls of the respective cleaning blocks are in contact with the inner wall of the rotary drilling cylinder; The cleaning block is an elastically deformable structure. Wrinkles are formed on the lower surface of the cleaning block, and the upper surface of the cleaning block slopes downward in the direction towards the inner wall of the rotary drilling cylinder.

5. The rotary drilling bit according to claim 1, characterized in that, The rotary drilling head is provided with a drilling hole which communicates with the rotary drilling cavity and is located on one side of the second pushing surface, and the soil drilled through the drilling hole can push against the second pushing surface.

6. The rotary drilling bit according to claim 5, wherein, The pressure rod is hollow inside, and the unlocking driving member includes an unlocking rod which is inserted into the pressure rod and can move inside the pressure rod, and one end of the unlocking rod can extend out of the cleaning member, and the other end can extend out of the pressure rod.

7. A drilling device for wharf construction, characterized in that, The drilling device includes: The rotary drilling bit according to any one of claims 1-6; A guiding mechanism, the guiding mechanism includes a plurality of sleeve rods which are sleeved with each other and can move relative to each other, and one end of the innermost sleeve rod is connected to the mounting seat; and A traction mechanism for traction the innermost sleeve rod to move.

8. The drilling device for wharf construction according to claim 7, characterized in that, The drilling device further includes a positioning mechanism, the positioning mechanism includes a positioning cylinder and a clamping assembly, a positioning hole is formed in the positioning cylinder, the clamping assembly is arranged in the positioning hole, the guiding mechanism is inserted into the positioning hole, the clamping assembly can clamp the outermost sleeve rod, and an annular limiting bottom plate is arranged at the bottom end of the positioning cylinder.

9. The drilling device for wharf construction according to claim 8, characterized in that, The clamping assembly includes a clamping seat, a clamping driving member, at least two clamping claws and at least two clamping resetting members, the clamping seat is arranged on the inner upper part of the positioning cylinder, a clamping space is formed in the clamping seat, each clamping claw is arranged at intervals around the axis of the positioning cylinder on the inner wall of the clamping space and is movable relative to the clamping seat, the clamping resetting member is used to provide a resetting force for the clamping claw to move away from the guiding mechanism, and the clamping driving member is arranged on the positioning cylinder and is used to provide a pushing force for the clamping claw to move towards the guiding mechanism.

10. The drilling device for wharf construction according to claim 9, characterized in that, A hydraulic cavity is further formed in the clamping seat, a piston rod is connected to one end of each clamping claw facing away from the clamping space, a piston body is connected to the end of the piston rod facing away from the clamping claw, the piston body is movably arranged in the hydraulic cavity, the piston body is in sealed contact with the inner wall of the hydraulic cavity, the clamping resetting member is sleeved on the piston rod and is used to provide an elastic force for the piston body along the direction away from the guiding mechanism; the clamping driving member is used to input or output pressure liquid into the hydraulic cavity.

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