Drill burying prevention sand fishing bucket structure of rotary drilling rig

Abstract

The invention relates to the technical field of rotary drilling rigs, in particular to a drill burying prevention sand fishing bucket structure of a rotary drilling rig, which comprises a sand fishing bucket, a cover plate is hinged to the bottom of the sand fishing bucket, a driving shaft is fixedly connected to the top of the sand fishing bucket, a spiral blade is axially and slidably connected to the periphery of the driving shaft, and the spiral blade can synchronously rotate with the driving shaft. The spiral blade can convey collapsed soil into the sand fishing bucket through reverse rotation, meanwhile, a cover plate at the bottom of the sand fishing bucket is opened, the internal soil is discharged, soil obstruction is avoided, the sand fishing bucket can be taken out more conveniently, and the influence on well drilling is small. Compared with the prior art that a sand fishing bucket is abandoned or a large amount of manpower and material resources are consumed for taking out the sand, the working efficiency is greatly improved, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary drilling rigs, and particularly to an anti-buried drill sand bucket structure for a rotary drilling rig. Background Art

[0002] A rotary drilling rig is a construction machine suitable for hole-forming operations in building foundation engineering, mainly applicable to the construction of soil layers such as sandy soil, cohesive soil, and silty soil, and is widely used in various foundation construction projects such as cast-in-place piles, diaphragm walls, and foundation reinforcement. In the construction of roads and bridges, rotary drilling rigs are used for hole-forming operations of bored cast-in-place pile foundations, and they can quickly form holes in various strata such as clay, sandy soil, gravel layers, and weathered rock layers. By rotating the drill bit to cut the soil and bringing the soil chips out of the hole, the hole-forming efficiency is high, and the stability and perpendicularity of the hole wall can be ensured, providing good conditions for the subsequent lowering of the steel cage and concrete pouring. For example, in the construction of urban viaducts, rotary drilling rigs can quickly complete a large number of pile foundation hole-forming works, shortening the construction period of the bridge.

[0003] Chinese Patent CN117536554B discloses a sand bucket and a rotary drilling rig. The solution includes a bucket body and a vibration device arranged above the bucket body. The vibration device includes an upper bottom plate, a lower bottom plate, a second inner connecting square arranged on the upper surface of the upper bottom plate, a second outer connecting square arranged on the lower surface of the lower bottom plate, a vibration motor group symmetrically arranged on the upper surface of the lower bottom plate, a plurality of spring tension rod assemblies connecting the upper bottom plate and the lower bottom plate, and a bucket unlocking device passing through between the upper bottom plate and the lower bottom plate. This solution can break the crushing strength of the hard rock formation through the sand bucket and the rotary drilling rig, so as to break the hard rock bottom layer for drilling operations.

[0004] However, when the sand bucket of the above-mentioned rotary drilling rig is performing drilling work, the drilling hole may collapse, making it impossible to pull out the sand bucket. This not only requires time and effort to take out the sand bucket, but also the drilling hole at this place is damaged, seriously affecting the work efficiency. Summary of the Invention

[0005] Based on this, in view of the problem that the sand bucket of the current rotary drilling rig cannot be pulled out when the drilling hole collapses during the drilling process, thus affecting the work efficiency, it is necessary to provide an anti-buried drill sand bucket structure for a rotary drilling rig.

[0006] The above object is achieved by the following technical solutions: An anti-buried drill sand bucket structure for a rotary drilling rig, comprising: A sand bucket, a cover plate is hinged at the bottom of the sand bucket, a plurality of drill bits are arranged at the bottom end of the cover plate, and a drive shaft is coaxially and fixedly arranged at the top of the sand bucket; The spiral blade is axially slidably sleeved on the outer periphery of the drive shaft and is located above the sand dredging bucket. When the spiral blade is within a preset area of the drive shaft, it rotates synchronously with the drive shaft. The unlocking rod is axially slidably arranged at the top end of the sand dredging bucket and is located below the spiral blade. The unlocking rod is used to open or restrict the cover plate. The elastic member is located between the spiral blade and the sand dredging bucket. The elastic member can make the spiral blade tend to move away from the unlocking rod.

[0007] Furthermore, the outer periphery of the preset area of the drive shaft has axially arranged limiting keys, and the inner periphery of the spiral blade is provided with axially extending limiting grooves.

[0008] Furthermore, an adjusting assembly is arranged on the spiral blade. The adjusting assembly can adjust the pitch of the spiral blade, and the pitch of the spiral blade is positively correlated with the size of stones or soil clods in the soil.

[0009] Furthermore, the adjusting assembly includes a first adjusting ring and a second adjusting ring. The first adjusting ring and the second adjusting ring are both coaxially and slidably sleeved on the outer periphery of the drive shaft. The first adjusting ring and the second adjusting ring are respectively fixedly connected to the upper and lower parts of the inner ring of the spiral blade, and a plurality of adjusting bolts are arranged between the first adjusting ring and the second adjusting ring.

[0010] Furthermore, a plurality of dividing steel cables are arranged between the starting end and the ending end of the spiral blade.

[0011] Furthermore, a hook is hinged on the bottom side wall of the sand dredging bucket. The intersection of the hooked part and the connecting part of the hook is the hinge center. One end of the connecting part of the hook away from the hinge center is hinged to the bottom of the unlocking rod, and the hooked part of the hook hooks the cover plate.

[0012] Furthermore, the cover plate includes a hinged plate and a shielding plate. One end of the hinged plate is hinged on the bottom side wall of the sand dredging bucket. The other end of the hinged plate is clamped on the sand dredging bucket through the unlocking rod. The shielding plate is coaxially and rotatably arranged on the lower end face of the hinged plate. The shielding plate has the same shape as the hinged plate. A plurality of drill bits are arranged on the lower end face of the shielding plate. When the shielding plate coincides with the hinged plate, through holes are formed on both sides. When the shielding plate and the hinged plate are staggered, the bottom of the sand dredging bucket is blocked.

[0013] Furthermore, a stop strip is arranged on the side edge of the hinged plate, and the stop strip is perpendicular to the hinged plate.

[0014] Furthermore, a counterweight is fixedly arranged on the shielding plate, and the counterweight is far away from the hinged position of the hinged plate.

[0015] Further, a return spring is sleeved on the outer periphery of the unlocking rod extending out of the sand dredging bucket, and the return spring makes the unlocking rod tend to move upward.

[0016] The beneficial effects of the present invention are as follows: By arranging a spiral blade above the sand dredging bucket in the present invention, when the drilling hole collapses, the spiral blade can convey the collapsed soil into the sand dredging bucket by reverse rotation. At the same time, the bottom cover plate of the sand dredging bucket opens to discharge the internal soil, avoiding soil obstruction, making it more convenient to take out the sand dredging bucket, and having little impact on the drilling. Compared with the existing technology of discarding the sand dredging bucket or using a large amount of manpower and material resources to take it out, the working efficiency is greatly improved and the cost is reduced.

[0017] By arranging a limit key in a preset area of the drive shaft and a limit groove on the spiral blade in the present invention, when the spiral blade conveys too much soil and causes soil accumulation between it and the sand dredging bucket, the spiral blade will move upward, causing the limit groove to disengage from the limit key, thereby stopping rotation and avoiding continuous soil conveyance. After the accumulated soil enters the sand dredging bucket, the spiral blade resets and continues to work, effectively avoiding the phenomenon of soil accumulation.

[0018] By arranging an adjustment component on the spiral blade in the present invention, the pitch can be adjusted according to the size of stones or soil blocks in the soil. For example, when encountering larger soil blocks or stones, the pitch is increased to make the gap between the starting end and the ending end of the spiral blade larger for easy passage; when encountering smaller soil blocks or stones, the pitch is decreased. The adjustment component includes a first adjustment ring, a second adjustment ring, and an adjustment bolt, which is convenient to operate, can improve the adaptability of the sand dredging bucket to different soil environments, and can adjust the amount of soil blocks or stones passing through the spiral blade per unit time, reducing the possibility of soil extrusion.

[0019] By arranging a plurality of dividing steel cables between the starting end and the ending end of the spiral blade in the present invention, larger-sized stones or soil blocks can be cut to reduce their size, facilitating the entry and discharge of soil blocks or stones into and out of the sand dredging bucket. At the same time, one end of the dividing steel cable is fixed, and the other end is connected by a screw rod and a nut, which can adapt to the spiral blade with variable pitch and ensure its normal operation.

[0020] The cover plate of the present invention includes a hinge plate and a shielding plate. The hinge plate is hinged to the bottom side wall of the sand dredging bucket, and the shielding plate is rotatably connected to the hinge plate coaxially. When they are staggered, they block the bottom of the sand dredging bucket, and when they overlap, channels are formed on both sides for soil to enter. A stop bar is arranged on the side edge of the hinge plate to control the rotation angle of the shielding plate so that they stop after rotating a certain angle relative to each other, ensuring normal drilling and soil discharge. A counterweight is arranged on the shielding plate away from the hinge position. When the sand dredging bucket is pulled out during drilling hole collapse, it can drive the shielding plate to rotate to the position overlapping with the hinge plate, and can also weaken the tendency of the shielding plate to rotate relative to the hinge plate, avoiding affecting soil discharge.

[0021] In the present invention, a return spring is sleeved on the part of the unlocking rod extending out of the sand dredging bucket. During normal drilling, the return spring moves the unlocking rod upward, and the hook tightly hooks the buckle on the hinged plate to fix the cover plate. When the drilling hole collapses, the collapsed soil falls on the spiral blade, causing the spiral blade to squeeze the elastic member and move downward, driving the unlocking rod downward, so that the hook disengages from the buckle of the hinged plate, automatically opening the bottom of the sand dredging bucket, which is convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. is a schematic structural diagram of an anti-buried drill sand dredging bucket of a rotary drilling rig provided by an embodiment of the present invention; Figure 2 is Figure 1 a partial enlarged view of part A of the anti-buried drill sand dredging bucket structure of a rotary drilling rig provided by an embodiment in; Figure 3 is Figure 1 a right view of the anti-buried drill sand dredging bucket structure of a rotary drilling rig provided by an embodiment in; Figure 4 is Figure 3 a sectional view along X-X of the anti-buried drill sand dredging bucket structure of a rotary drilling rig provided by an embodiment in; Figure 5 is Figure 4 a partial enlarged view of part B of the anti-buried drill sand dredging bucket structure of a rotary drilling rig provided by an embodiment in; Figure 6 is Figure 1 a top view of the anti-buried drill sand dredging bucket structure of a rotary drilling rig provided by an embodiment in; Figure 7 is Figure 6 a sectional view along Y-Y of the anti-buried drill sand dredging bucket structure of a rotary drilling rig provided by an embodiment in; Figure 8 is Figure 7 a partial enlarged view of part C of the anti-buried drill sand dredging bucket structure of a rotary drilling rig provided by an embodiment in; Figure 9 FIG. is a bottom open state diagram of the anti-buried drill sand dredging bucket structure of a rotary drilling rig provided by an embodiment of the present invention; Figure 10 FIG. is a bottom open state diagram of the anti-buried drill sand dredging bucket structure of a rotary drilling rig provided by an embodiment of the present invention from another angle.

[0023] Wherein: 100, sand dredging bucket; 110, opening; 120, connecting rib plate; 130, connecting sleeve; 140, pin; 150, hinged plate; 151, stop bar; 160, shielding plate; 161, counterweight; 170, drill bit; 180, drive shaft; 190, limit key; 200, spiral blade; 201, starting end; 202, terminal end; 210, elastic member; 220, first adjusting ring; 230, second adjusting ring; 240, limiting groove; 250, adjusting bolt; 260, dividing cable; 270, screw rod; 280, nut; 300, unlocking rod; 310, reset spring; 320, hook; 330, hooked portion; 340, connecting portion. Detailed implementation manner

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in the present invention, unless otherwise clearly defined and limited, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 invention.

[0026] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0027] Next, refer to Figures 1 - 10 to describe a structure of an anti-buried drill sand bucket for a rotary drilling rig provided by the present invention.

[0028] An anti-buried drill sand dredging bucket structure for a rotary drilling rig, including a sand dredging bucket 100. A cover plate is provided at the bottom of the sand dredging bucket 100, and the cover plate can block or open the bottom of the sand dredging bucket 100. A plurality of drill bits 170 are provided at the bottom of the cover plate, and the plurality of drill bits 170 are arranged in a row. A drive shaft 180 is coaxially and fixedly provided at the top of the sand dredging bucket 100. The drive shaft 180 is driven by a drive element (not shown in the figure). For example, a drive sleeve is provided on the robotic arm of a transport vehicle, and the drive sleeve is driven by a drive motor. The drive sleeve is connected to the drive shaft 180 to drive the drive shaft 180 to rotate. The drive shaft 180 drives the sand dredging bucket 100 to rotate around its own axis. The sand dredging bucket 100 drives the cover plate, and the cover plate drives the plurality of row-arranged drill bits 170 to start drilling.

[0029] A spiral blade 200 is axially slidably sleeved on the outer periphery of the drive shaft 180. The spiral blade 200 is located above the sand dredging bucket 100. The drive shaft 180 drives the spiral blade 200 to rotate synchronously. When the spiral blade 200 rotates, it can transport the soil in the drilling hole upward or downward. When a borehole collapse occurs in the drilling, the sand dredging bucket 100 and the drill bits 170 will be buried in the drilling and difficult to take out. At this time, the drive shaft 180 rotates in the reverse direction to drive the spiral blade 200 to rotate in the reverse direction synchronously. The spiral blade 200 transports the soil inside the drilling into the sand dredging bucket 100, that is, transports the soil downward. The robotic arm of the transport vehicle pulls the sand dredging bucket 100 upward. At the same time, the cover plate at the bottom of the sand dredging bucket 100 opens. When the sand dredging bucket 100 is pulled out of the collapsed borehole drilling, the soil inside it can be discharged from the sand dredging bucket 100, preventing the soil from hindering the sand dredging bucket 100 from being pulled out of the collapsed borehole drilling.

[0030] An unlocking rod 300 is axially slidably provided at the upper end of the sand dredging bucket 100. The unlocking rod 300 is located below the spiral blade 200. One end of the unlocking rod 300 can limit the cover plate, and the other end of the unlocking rod 300 extends out of the upper end of the sand dredging bucket 100. When the unlocking rod 300 moves downward along the axis of the sand dredging bucket 100, it can release the cover plate. The cover plate is no longer restricted by the unlocking rod 300, and the cover plate opens under the action of the gravity of the soil inside the sand dredging bucket 100, so that the soil inside the sand dredging bucket 100 can be discharged.

[0031] An elastic member 210 is provided between the spiral blade 200 and the sand dredging bucket 100. One end of the elastic member 210 abuts against the bottom end of the spiral blade 200, and the other end of the elastic member 210 abuts against the top end of the sand dredging bucket 100. The elastic member 210 can make the spiral blade 200 tend to move away from the unlocking rod 300. The elastic member 210 is a compression spring. When the drill bit 170 at the bottom of the sand dredging bucket 100 is drilling normally, the gravity of the spiral blade 200 itself can compress the elastic member 210, and the compression degree of the elastic member 210 is small. The distance between the bottom of the spiral blade 200 and the top of the unlocking rod 300 is far. When the drilling hole collapses, the inner wall of the drilling collapses. Since the spiral blade 200 is located above the sand dredging bucket 100, the soil on the inner wall of the drilling will fall on the spiral blade 200. The spiral blade 200 is pressed down by the gravity of the soil and further compresses the elastic member 210. When the spiral blade 200 compresses the elastic member 210, it will push the unlocking rod 300, so that the unlocking rod 300 moves downward, and the unlocking rod 300 releases the restriction on the cover plate.

[0032] It should be noted that in the prior art, when the drilling hole collapses, generally the sand dredging bucket 100 is abandoned or a large amount of manpower and material resources are used to dig out the sand dredging bucket 100 again. In the present invention, a spiral blade 200 is provided above the sand dredging bucket 100, so that when the drilling hole collapses, the reverse rotation of the spiral blade 200 can discharge the collapsed soil from the inside of the sand dredging bucket 100, so as to more conveniently take out the sand dredging bucket 100, and there is almost no influence on the drilling when taking out the sand dredging bucket 100.

[0033] In order to make the soil enter the sand dredging bucket 100 from the top of the sand dredging bucket 100, two openings 110 are provided at the bottom of the sand dredging bucket 100, and the two openings 110 can make the soil enter the sand dredging bucket 100 under the transportation of the spiral blade 200.

[0034] Specifically, in order to make the spiral blade 200 rotate synchronously with the driving shaft 180, a limit key 190 is fixedly provided on the outer circumference of a preset area of the driving shaft 180. The limit key 190 is arranged along the axial direction of the driving shaft 180. A limit groove 240 extending along the axial direction of the spiral blade 200 is formed in the inner circumference of the spiral blade 200. The limit key 190 is located in the limit groove 240. When the driving shaft 180 rotates, the spiral blade 200 is driven to rotate through the limit key 190 and the limit groove 240. At the same time, the spiral blade 200 can slide in the limit groove 240 through the limit key 190 so that the spiral blade 200 can move along the axial direction of the driving shaft 180. When the spiral blade 200 axially slides outside the preset area, that is, the limit groove 240 on the inner circumference of the spiral blade 200 disengages from the limit key 190, the spiral blade 200 no longer rotates synchronously with the driving shaft 180 at this time. The functions of such a setting are as follows: When the amount of soil conveyed by the spiral blade 200 is large, there is too much soil between the spiral blade 200 and the sand dredging bucket 100. Since the speed of soil entering the sand dredging bucket 100 is less than the conveying speed of the spiral blade 200, the soil between the spiral blade 200 and the sand dredging bucket 100 gradually increases, which pushes the spiral blade 200 to move upward on the drive shaft 180. When the soil reaches a certain amount, the limit groove 240 of the spiral blade 200 disengages from the limit key 190, that is, the spiral blade 200 disengages from the preset area. At this time, the spiral blade 200 no longer rotates synchronously with the drive shaft 180. Therefore, the spiral blade 200 stops conveying soil. When the soil between the spiral blade 200 and the sand dredging bucket 100 gradually enters the sand dredging bucket 100, the spiral blade 200 can gradually reset and then can continue to convey soil. By setting the limit key 190 in the preset area, the phenomenon of soil accumulation caused by the relatively fast conveying speed of the spiral blade 200 can be effectively avoided.

[0035] More specifically, as Figure 1 and Figure 3 shown, for the convenience of connecting the sand dredging bucket 100 and the drive shaft 180, four connecting rib plates 120 are fixedly arranged at the top of the sand dredging bucket 100. The four connecting rib plates 120 are vertically connected to the top end of the sand dredging bucket 100. The four connecting rib plates 120 do not block the two openings 110. The four connecting rib plates 120 are commonly connected with a connecting sleeve 130. Two first pin holes are arranged on the side wall of the connecting sleeve 130. Two second pin holes are formed on the drive shaft 180. When the connecting sleeve 130 is sleeved on the drive shaft 180 and the two first pin holes correspond to the two second pin holes, a connecting pin 140 is inserted into the first pin hole and the second pin hole to connect the sand dredging bucket 100 to the drive shaft 180.

[0036] In a further embodiment, an adjusting assembly is provided on the spiral blade 200 of the present invention. The adjusting assembly can adjust the pitch of the spiral blade 200. The pitch of the spiral blade 200 is positively correlated with the size of stones or soil clods in the soil.

[0037] Specifically, as Figure 2 、 Figure 3 and Figure 8As shown in the figure, the adjusting assembly includes a first adjusting ring 220 and a second adjusting ring 230. Both the first adjusting ring 220 and the second adjusting ring 230 are axially slidably arranged on the outer periphery of the driving shaft 180. The outer peripheries of the first adjusting ring 220 and the second adjusting ring 230 are respectively fixedly connected to the upper and lower parts of the inner periphery of the spiral blade 200. A plurality of adjusting bolts 250 are arranged between the first adjusting ring 220 and the second adjusting ring 230. The adjusting bolts 250 connect the first adjusting ring 220 and the second adjusting ring 230, and when the plurality of adjusting bolts 250 rotate around their own axes, the distance between the first adjusting ring 220 and the second adjusting ring 230 can be adjusted. When the distance between the first adjusting ring 220 and the second adjusting ring 230 changes, the pitch of the spiral blade 200 can be changed. When the first adjusting ring 220 and the second adjusting ring 230 are far apart, the pitch of the spiral blade 200 is larger, that is, the gap between the starting end 201 and the ending end 202 of the spiral blade 200 increases, so that the gap can accommodate larger soil blocks or stone blocks. When the first adjusting ring 220 and the second adjusting ring 230 are close to each other, the pitch of the spiral blade 200 is smaller, that is, the gap between the starting end 201 and the ending end 202 of the spiral blade 200 decreases, so that the size of the stone blocks or soil blocks accommodated in the gap decreases.

[0038] It should be noted that the inner ring of the spiral blade 200 in this embodiment is spiral. When the first adjusting ring 220 is fixedly connected to the upper part of the inner periphery of the spiral blade 200, the spiral upper part of the inner ring of the spiral blade 200 is fixedly connected to the outer periphery of the first adjusting ring 220. Similarly, when the second adjusting ring 230 is fixedly connected to the lower part of the inner periphery of the spiral blade 200, the spiral lower part of the inner ring of the spiral blade 200 is fixedly connected to the outer periphery of the second adjusting ring 230. The material of the spiral blade 200 is a rigid material. When the first adjusting ring 220 and the second adjusting ring 230 move away from or close to each other, the spiral upper and lower parts of the inner periphery of the spiral blade 200 can be driven to move closer to or away from each other, thereby changing the pitch of the spiral blade 200.

[0039] To facilitate the synchronous rotation of the first adjusting ring 220 and the second adjusting ring 230 with the driving shaft 180 and enable axial sliding on the driving shaft 180, the limiting grooves 240 in the present invention are respectively opened on the inner peripheries of the first adjusting ring 220 and the second adjusting ring 230. The limiting grooves 240 on the inner peripheries of the first adjusting ring 220 and the second adjusting ring 230 are slidably connected to the limiting keys 190 on the outer periphery of the driving shaft 180. The first adjusting ring 220 and the second adjusting ring 230 rotate synchronously with the driving shaft 180 and axially slide along the driving shaft 180 through the limiting grooves 240 and the limiting keys 190.

[0040] More specifically, in this embodiment, a dividing steel cable 260 is arranged at the gap of the spiral blade 200, that is, as Figure 7 and Figure 8A dividing cable 260 is connected between the starting end 201 and the ending end 202 of the spiral blade 200 shown. There are multiple dividing cables 260, and the multiple dividing cables 260 are evenly distributed between the starting end 201 and the ending end 202. The multiple dividing cables 260 can cut larger-sized stones or soil blocks, reducing the size of the large-sized stones or soil blocks and facilitating the entry and discharge of the soil blocks or stones into and out of the sand dredging bucket 100.

[0041] It should be noted that, in order to make the dividing cable 260 adapt to the spiral blade 200 with a variable pitch, one end of the two ends of the dividing cable 260 in this embodiment is fixedly arranged at the top of the spiral blade 200, and a screw rod 270 is fixedly arranged at the other end. The screw rod 270 passes through the bottom of the spiral blade 200, and a nut 280 is arranged at the bottom of the spiral blade 200. Through the arrangement of the nut 280 and the screw rod 270, it can adapt to the spiral blade 200 with a variable pitch.

[0042] Specifically, as Figure 4 and Figure 5 shown, a hook 320 is hinged on the side wall of the sand dredging bucket 100 in this embodiment. The hook 320 is used to realize the function of restricting or releasing the cover plate by the unlocking rod 300. The hook 320 has a hook part 330 and a connecting part 340. The intersection of the hook part 330 and the connecting part 340 of the hook 320 is hinged on the side wall at the bottom of the sand dredging bucket 100. The hook part 330 of the hook 320 contacts one end of the cover plate, and the connecting part 340 of the hook 320 is hinged to the bottom end of the unlocking rod 300. When the unlocking rod 300 moves along the axis of the sand dredging bucket 100, it can drive the hook 320 to rotate around the hinged position, so that the hook part 330 of the hook 320 can hook or release one end of the cover plate.

[0043] In a further embodiment, as Figure 9 and Figure 10 shown, the cover plate of the present invention includes a hinged plate 150 and a shielding plate 160. One end of the hinged plate 150 is hinged to the side wall at the bottom of the sand dredging bucket 100, and a buckle is arranged at the other end of the hinged plate 150. The buckle can contact the hook part 330 of the hook 320 and thus be clamped at the bottom of the sand dredging bucket 100. The shielding plate 160 is coaxially and rotatably connected to the hinged plate 150. The shielding plate 160 can rotate a certain angle relative to the hinged plate 150. Multiple drill bits 170 of the present invention are fixedly arranged at the bottom of the shielding plate 160, as Figure 10As shown, the baffle plate 160 and the hinge plate 150 have the same shape. Both the baffle plate 160 and the hinge plate 150 are in the shape of the number 8 or an hourglass. When the baffle plate 160 and the hinge plate 150 are staggered, they can form a complete circle to completely block the bottom of the sand dredging bucket 100. When the baffle plate 160 and the hinge plate 150 overlap, the bottom of the sand dredging bucket 100 is no longer blocked but allows the drilled soil to enter the sand dredging bucket 100. When the sand dredging bucket 100 is filled with soil, the drilling stops. The drive shaft 180 rotates in the reverse direction to drive the hinge plate 150 to rotate relative to the baffle plate 160. When the hinge plate 150 and the baffle plate 160 are in the staggered state, the hinge plate 150 and the baffle plate 160 block the bottom of the sand dredging bucket 100. Then, the sand dredging bucket 100 is taken out of the drilling hole. After taking it out, the restriction of the hook 320 on the hinge plate 150 is released, the bottom of the sand dredging bucket 100 is opened, and the soil inside the sand dredging bucket 100 is discharged. After discharging the soil, the hinge plate 150 is restricted again, and the sand dredging bucket 100 is put back into the drilling hole to continue drilling. This process is repeated until the drilling is completed.

[0044] It should be noted that in order to enable the hinge plate 150 and the baffle plate 160 to stop rotating after rotating a certain angle relative to each other, as Figure 10 shown, in this embodiment, a stop strip 151 is provided on the side edge of the hinge plate 150. The stop strip 151 is perpendicular to the hinge plate 150. When the baffle plate 160 rotates to contact the stop strip 151 on the side edge of the hinge plate 150, it cannot continue to rotate, so that the baffle plate 160 and the hinge plate 150 overlap. There will be channels on both sides when the baffle plate 160 and the hinge plate 150 overlap. Such a structural setting enables the soil to enter the sand dredging bucket 100 during the drilling process. When the sand dredging bucket 100 is driven by the drive shaft 180 to rotate, since the hinge plate 150 is hinged to the bottom side wall of the sand dredging bucket 100, the hinge plate 150 rotates synchronously with the sand dredging bucket 100. The drill bit 170 at the bottom of the baffle plate 160 contacts the soil in the drilling hole. When the baffle plate 160 is unlocked, it rotates in the reverse direction relative to the hinge plate 150. At this time, the baffle plate 160 contacts the stop strip 151 on the side wall of the hinge plate 150 and then rotates synchronously. The drill bit 170 at the bottom of the baffle plate 160 rotates synchronously with the baffle plate 160, the hinge plate 150 and the sand dredging bucket 100, so that the drill bit 170 can drill the hole.

[0045] It should also be noted that when the soil inside the sand dredging bucket 100 is filled, the hinge plate 150 and the baffle plate 160 need to be staggered to block the sand dredging bucket 100. When the sand dredging bucket 100 leaves the drilling well, the soil inside is taken out. When the sand dredging bucket 100 is drilling normally, the hinge plate 150 and the baffle plate 160 at the bottom of the sand dredging bucket 100 are in a coincident state. Therefore, it is necessary to drive the sand dredging bucket 100 in the reverse direction. The reverse rotation of the sand dredging bucket 100 drives the hinge plate 150 to rotate relative to the baffle plate 160 in the reverse direction, so that the side of the baffle plate 160 contacts the other side of the stop bar 151. At this time, the hinge plate 150 and the baffle plate 160 are in a staggered state, so that the soil inside the sand dredging bucket 100 can be taken out.

[0046] In a further embodiment, a counterweight block 161 is fixedly arranged on the baffle plate 160. The counterweight block 161 is specifically located at a position on the baffle plate 160 far from the hinge of the hinge plate 150. The setting of the counterweight block 161 enables the baffle plate 160 and the hinge plate 150 to coincide when the sand dredging bucket 100 is pulled out during the collapse of the drilling well. Since the position of the counterweight block 161 is far from the hinge position, the counterweight block 161 can drive the baffle plate 160 to rotate to the position coinciding with the hinge plate 150 under the action of gravity, and the counterweight block 161 can weaken the tendency of the baffle plate 160 to rotate relative to the hinge plate 150 to a certain extent, so as to prevent the baffle plate 160 and the hinge plate 150 from affecting the discharge of the soil inside the sand dredging bucket 100.

[0047] More specifically, a return spring 310 is sleeved on the outer periphery of the part of the unlocking rod 300 extending out of the sand dredging bucket 100. One end of the return spring 310 is connected to the outer periphery of the unlocking rod 300, and the other end of the return spring 310 abuts against the top end of the sand dredging bucket 100. The return spring 310 is a compression spring. The return spring 310 pushes the unlocking rod 300 so that the unlocking rod 300 has a tendency to move upward, so that the unlocking rod 300 pulls the connecting part 340 of the hook 320 to have a tendency to rotate upward, that is, the hook part 330 of the hook 320 tightly hooks the buckle on the hinge plate 150. When the drilling well collapses, when the collapsed soil falls on the spiral blade 200, the weight of the soil itself forces the spiral blade 200 to squeeze the elastic member 210 and move downward. After the lower end surface of the spiral blade 200 contacts the top end of the unlocking rod 300, it drives the unlocking rod 300 to move downward as a whole, so that the hook part 330 of the hook 320 disengages from the buckle of the hinge plate 150, that is, the hinge plate 150 rotates around the hinge position to open the sand dredging bucket 100.

[0048] Combined with the above embodiments, the specific working process of an anti-buried drill sand dredging bucket structure of a rotary drilling rig provided by the present invention is described as follows: Adjustment: Before starting drilling, obtain the soil conditions in the drilling area, obtain the average size of soil clods or stones in the soil, and adjust the pitch of the spiral blade 200 according to the obtained data, that is, adjust the distance between the first adjusting ring 220 and the second adjusting ring 230, so that the gap between the upper and lower ends of the spiral blade 200 can pass through the soil clods or stones of the appropriate size. At the same time, adjust the dividing cable 260 between the upper and lower ends of the spiral blade 200 so that the dividing cable 260 adapts to the distance between the upper and lower ends of the spiral blade 200, thereby ensuring that the dividing cable 260 is in a tensioned state.

[0049] Drilling: The operator drives the transport vehicle, and the robotic arm on the transport vehicle causes the buckle of the hinge plate 150 to be hooked by the hook portion 330 of the hook 320. The drive shaft 180 rotates to drive the spiral blade 200 and the sand dredging bucket 100 to rotate synchronously. The robotic arm of the transport vehicle presses the sand dredging bucket 100 against the drilling position. When the sand dredging bucket 100 rotates, it drives the hinge plate 150 hinged at the bottom to rotate synchronously. The baffle plate 160 rotatably connected to the hinge plate 150 rotates relative to the hinge plate 150. When the baffle plate 160 rotates to contact the stop strip 151 on the side of the hinge plate 150, the baffle plate 160 and the hinge plate 150 are relatively stationary, and the baffle plate 160 coincides with the hinge plate 150. Channels are formed on both sides of the hinge plate 150 and the baffle plate 160. When the sand dredging bucket 100 rotates, it drives the drill bit 170 at the bottom of the baffle plate 160 to start drilling. The drilled soil enters the inside of the sand dredging bucket 100 through the channel at the bottom of the sand dredging bucket 100. When the inside of the sand dredging bucket 100 is filled with soil, the drive shaft 180 rotates in the reverse direction by a certain angle so that the baffle plate 160 rotates in the reverse direction relative to the hinge plate 150, thereby causing the baffle plate 160 and the hinge plate 150 to stagger. At this time, the baffle plate 160 and the hinge plate 150 block the bottom of the sand dredging bucket 100. Subsequently, the operator controls the robotic arm of the transport vehicle to take out the sand dredging bucket 100 from the drilling. After taking out the sand dredging bucket 100, press the unlocking lever 300, so that the unlocking lever 300 pushes the hook 320 to rotate, and the hook 320 no longer restricts the buckle of the hinge plate 150. The hinge plate 150 rotates around the hinge position under the action of gravity to open the bottom of the sand dredging bucket 100, and the soil inside the sand dredging bucket 100 is discharged. After the soil is discharged, the buckle of the hinge plate 150 is re-fastened to the hook portion 330 of the hook 320, and then the sand dredging bucket 100 is placed into the drilling. The drive shaft 180 drives the sand dredging bucket 100 to rotate again to drill the soil until the inside of the sand dredging bucket 100 is filled with soil again and then taken out again, and so on in a cycle until the drilling is completed.

[0050] Drilling hole collapse: If the drilling hole collapses, the sand bucket 100, the spiral blade 200, and the drill bit 170 will all be buried in the drilling hole. The soil in the drilling hole will fall above the spiral blade 200. The weight of the soil will cause the spiral blade 200 to compress the elastic member 210 and move downward. The bottom of the spiral blade 200 contacts the top of the unlocking rod 300 and drives the unlocking rod 300 to move downward. The unlocking rod 300 pushes the connecting portion 340 of the hook 320 to rotate around the hinge position, so that the hook portion 330 of the hook 320 releases the restriction on the hinge plate 150. The operator controls the robotic arm of the transport vehicle to pull the sand bucket 100 and drive the sand bucket 100 to rotate in the reverse direction. The spiral blade 200 on the drive shaft 180 rotates synchronously in the reverse direction to start conveying the soil located on the spiral blade 200 downward. The soil is further broken after passing through the dividing cable 260 between the starting end 201 and the ending end 202 of the spiral blade 200. The soil enters the interior of the sand bucket 100. The soil pushes the hinge plate 150 to rotate around the hinge position to open the bottom of the sand bucket 100. When the sand bucket 100 moves upward and under the action of the counterweight 161, the shielding plate 160 rotates around the rotation center to a position coinciding with the hinge plate 150. During the process of pulling out the sand bucket 100, the counterweight 161 can reduce the rotation angle of the shielding plate 160 relative to the hinge plate 150, preventing the shielding plate 160 and the hinge plate 150 from being stuck in the drilling hole when the shielding plate 160 rotates by a large angle.

[0051] If there is a large amount of soil between the spiral blade 200 and the sand bucket 100, it will push the spiral blade 200 to move upward on the drive shaft 180. When the amount of soil reaches a certain level, the robotic arm of the transport vehicle cannot continue to pull the sand bucket 100. At this time, when the spiral blade 200 moves upward until the limiting groove 240 on the inner circumference of the first adjusting ring 220 and the second adjusting ring 230 disengages from the limiting key 190, the spiral blade 200 stops rotating and stops conveying the soil. The operator drives the drive shaft 180 to repeatedly switch the rotation direction through the robotic arm, so that the soil between the spiral blade 200 and the sand bucket 100 gradually enters the sand bucket 100. As the amount of soil decreases, the spiral blade 200 will also gradually reset, thereby preventing excessive soil accumulation between the spiral blade 200 and the sand bucket 100.

[0052] After the spiral blade 200 is reset, continue to convey the soil. The robotic arm of the transport vehicle continues to pull the drive shaft 180 upward, and the drive shaft 180 drives the sand bucket 100 to move upward to disengage from the collapsed drilling hole.

[0053] The technical features of the above 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 to be within the scope described in this specification.

[0054] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. The sand dredging bucket structure for preventing drill pipe burial of a rotary drilling rig, characterized in that Comprising: A sand dredging bucket, a cover plate is hinged at the bottom of the sand dredging bucket, a plurality of drill bits are arranged at the bottom end of the cover plate, and a driving shaft is coaxially and fixedly arranged at the top of the sand dredging bucket; A spiral blade, the spiral blade is axially slidably sleeved on the outer periphery of the driving shaft and is located above the sand dredging bucket, and the spiral blade rotates synchronously with the driving shaft when it is in a preset area of the driving shaft; An unlocking rod, the unlocking rod is axially slidably arranged at the top end of the sand dredging bucket and is located below the spiral blade, and the unlocking rod is used to open or restrict the cover plate; An elastic member, the elastic member is located between the spiral blade and the sand dredging bucket, and the elastic member can make the spiral blade have a tendency to move away from the unlocking rod.

2. The anti-buried drill sand dredging bucket structure of the rotary drilling rig according to claim 1, wherein, An axially arranged limiting key is provided on the outer periphery of the preset area of the driving shaft, and an axially extending limiting groove is opened in the inner periphery of the spiral blade.

3. The anti-buried drill sand dredging bucket structure of the rotary drilling rig according to claim 1, characterized in that, An adjusting assembly is arranged on the spiral blade, the adjusting assembly can adjust the pitch of the spiral blade, and the pitch of the spiral blade is positively correlated with the size of stones or soil blocks in the soil.

4. The anti-buried drill sand bucket structure of the rotary drilling rig according to claim 3, characterized in that, The adjusting assembly includes a first adjusting ring and a second adjusting ring, both the first adjusting ring and the second adjusting ring are coaxially and slidably sleeved on the outer periphery of the driving shaft, the first adjusting ring and the second adjusting ring are respectively fixedly connected to the upper and lower parts of the inner ring of the spiral blade, and a plurality of adjusting bolts are arranged between the first adjusting ring and the second adjusting ring.

5. The anti-buried drill sand dredging bucket structure of the rotary drilling rig according to claim 1, characterized in that, A plurality of dividing steel cables are arranged between the starting end and the ending end of the spiral blade.

6. The anti-buried drill sand bucket structure of the rotary drilling rig according to claim 1, characterized in that A hook is hinged on the side wall of the bottom of the sand dredging bucket, the intersection of the hook part and the connecting part of the hook is the hinge center, one end of the connecting part of the hook away from the hinge center is hinged to the bottom of the unlocking rod, and the hook part of the hook hooks the cover plate.

7. The anti-buried drill sand dredging bucket structure of the rotary drilling rig according to claim 6, characterized in that, The cover plate includes a hinged plate and a shielding plate, one end of the hinged plate is hinged on the side wall of the bottom of the sand dredging bucket, the other end of the hinged plate is clamped on the sand dredging bucket through the unlocking rod, the shielding plate is coaxially and rotatably arranged on the lower end face of the hinged plate, the shielding plate has the same shape as the hinged plate, a plurality of drill bits are arranged on the lower end face of the shielding plate, through holes are formed on both sides when the shielding plate coincides with the hinged plate, and the bottom of the sand dredging bucket is blocked when the shielding plate and the hinged plate are staggered.

8. The anti-buried drill sand bucket structure of the rotary drilling rig according to claim 7, characterized in that, A stop strip is arranged on the side edge of the hinged plate, and the stop strip is perpendicular to the hinged plate.

9. The anti-buried drill sand bucket structure of the rotary drilling rig according to claim 7, characterized in that, A counterweight block is fixedly arranged on the shielding plate, and the counterweight block is far away from the hinged position of the hinged plate.

10. The anti-buried drill sand dredging bucket structure of the rotary drilling rig according to claim 6, characterized in that, A return spring is sleeved on the outer periphery of the part of the unlocking rod extending out of the sand dredging bucket, and the return spring makes the unlocking rod have a tendency to move upward.

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