Anti-buried drill sand scoop structure for rotary drilling rig

Abstract

The present invention relates to the technical field of rotary drilling rigs, and specifically provides an anti-buried drilling sand hopper structure for a rotary drilling rig, comprising a sand hopper, a cover plate hinged at the bottom of the sand hopper, a drive shaft fixedly connected to the top of the sand hopper, a spiral blade axially slidably connected to the outer periphery of the drive shaft, and the spiral blades capable of rotating synchronously with the drive shaft. When a hole collapses during drilling, the spiral blades can transport the collapsed soil into the sand hopper by reverse rotation. At the same time, the cover plate at the bottom of the sand hopper opens to discharge the internal soil, avoiding soil obstruction, making it more convenient to remove the sand hopper with less impact on drilling. Compared with the existing method of discarding the sand hopper or consuming a large amount of manpower and material resources to remove it, the work efficiency is greatly improved and the cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of rotary drilling rigs, in particular to an anti-buried drill sand scoop structure of a rotary drilling rig. Background Art

[0002] A rotary drilling rig is a type of construction machinery suitable for drilling holes in building foundation projects. It is primarily suitable for working in soil layers such as sand, clay, and silty soil, and is widely used in various foundation construction projects, including cast-in-place piles, continuous walls, and foundation reinforcement. In road and bridge construction, rotary drilling rigs are used for drilling holes for cast-in-place pile foundations. They can quickly drill holes in various strata, such as clay, sand, gravel, and weathered rock. The rotating drill bit cuts through the soil, removing debris from the hole. This results in high drilling efficiency and ensures the stability and verticality of the hole wall, creating excellent conditions for the subsequent lowering of the reinforcement cage and pouring of concrete. For example, in the construction of urban viaducts, rotary drilling rigs can quickly complete large amounts of pile foundation drilling work, shortening bridge construction schedules.

[0003] Chinese patent CN117536554B discloses a sand scoop and a rotary drilling rig, which includes a scoop body and a vibration device arranged above the scoop body. The vibration device includes an upper base plate, a lower base plate, a second inner connecting party arranged on the upper surface of the upper base plate, a second outer connecting party arranged on the lower surface of the lower base plate, a vibration motor group symmetrically arranged on the upper surface of the lower base plate, a plurality of spring pull rod assemblies connecting the upper base plate and the lower base plate, and a scoop body unlocker passing through the upper base plate and the lower base plate. The solution can increase the strength of the hard rock formation through the sand scoop and the rotary drilling rig, thereby breaking the hard rock bottom layer for drilling operations.

[0004] However, when the bailer of the rotary drilling rig is drilling, the well may collapse, making it impossible to remove the bailer. This not only takes time and effort to remove the bailer, but also damages the drill hole, seriously affecting work efficiency. Summary of the Invention

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

[0006] The above purpose is achieved through the following technical solutions:

[0007] A rotary drilling rig anti-buried drill sand scoop structure, comprising:

[0008] A sand scoop, wherein a cover plate is hingedly connected to the bottom of the sand scoop, a plurality of drill bits are provided on the bottom end of the cover plate, and a drive shaft is coaxially and fixedly provided on the top of the sand scoop;

[0009] A spiral blade, wherein the spiral blade is axially slidably sleeved on the outer periphery of the drive shaft and is located above the sand scoop, and the spiral blade rotates synchronously with the drive shaft when it is within a preset area of ​​the drive shaft;

[0010] An unlocking rod, the unlocking rod being axially slidably disposed at the top of the sand scoop and located below the spiral blade, the unlocking rod being used to open or restrict the cover plate;

[0011] An elastic member is located between the spiral blade and the sand scoop, and the elastic member can make the spiral blade tend to move away from the unlocking rod.

[0012] Furthermore, the outer periphery of the preset area of ​​the drive shaft has an axially arranged limit key, and the inner periphery of the spiral blade is provided with an axially extending limit groove.

[0013] Furthermore, the spiral blade is provided with an adjusting component, which can adjust the pitch of the spiral blade. The pitch of the spiral blade is positively correlated with the size of stones or clods in the soil.

[0014] Furthermore, the adjustment assembly includes a first adjustment ring and a second adjustment ring, the first adjustment ring and the second adjustment ring are coaxial and slidingly sleeved on the outer periphery of the drive shaft, the first adjustment ring and the second adjustment ring are respectively fixedly connected to the upper and lower parts of the inner ring of the spiral blade, and a plurality of adjustment bolts are arranged between the first adjustment ring and the second adjustment ring.

[0015] Furthermore, a plurality of split steel cables are provided between the starting end and the end end of the spiral blade.

[0016] Furthermore, a hook is hinged on the bottom side wall of the sand scoop, the intersection of the hook portion and the connecting portion is the hinge center, the end of the connecting portion of the hook away from the hinge center is hinged to the bottom of the unlocking rod, and the hook portion of the hook hooks the cover plate.

[0017] Furthermore, the cover plate includes a hinged plate and a shielding plate, one end of the hinged plate is hinged to the bottom side wall of the sand hopper, and the other end of the hinged plate is engaged with the sand hopper through an unlocking rod, and the shielding plate is coaxially and rotatably arranged on the lower end surface of the hinged plate. The shielding plate has the same shape as the hinged plate, and multiple drill bits are arranged on the lower end surface of the shielding plate. When the shielding plate and the hinged plate overlap, through holes are formed on both sides, and when the shielding plate and the hinged plate are staggered, the bottom of the sand hopper is blocked.

[0018] Furthermore, a baffle is provided on the side of the hinge plate, and the baffle is perpendicular to the hinge plate.

[0019] Furthermore, the shielding plate is fixedly provided with a counterweight block, and the counterweight block is away from the hinge position of the hinge plate.

[0020] Furthermore, a return spring is provided on the outer periphery of the portion of the unlocking rod extending out of the sand scoop, and the return spring causes the unlocking rod to have a tendency to move upward.

[0021] The beneficial effects of the present invention are:

[0022] The present invention employs spiral blades positioned above the sand hopper. When a wellbore collapses, the spiral blades rotate in the opposite direction to transport the collapsed soil into the hopper. Simultaneously, the bottom cover of the hopper opens to allow the soil inside to drain, eliminating soil obstruction and making it easier to remove the hopper with minimal impact on drilling. Compared to existing methods that require discarding the hopper or requiring extensive labor and material resources to remove the hopper, this significantly improves work efficiency and reduces costs.

[0023] The present invention provides a limit key in a preset area of ​​the drive shaft and a limit groove on the spiral blade. When the spiral blade transports too much soil, causing soil to accumulate between it and the sand scoop, the spiral blade will move upward, causing the limit groove to disengage from the limit key, thereby stopping rotation and avoiding further soil transportation. After the accumulated soil enters the sand scoop, the spiral blade resets and continues to work, effectively avoiding soil accumulation.

[0024] The present invention provides an adjustment component on the spiral blade, which can adjust the pitch according to the size of the stones or clods in the soil. For example, when encountering larger clods or stones, the pitch is increased to enlarge the gap between the starting end and the end of the spiral blade to facilitate passage; when encountering smaller clods or stones, the pitch is reduced. The adjustment component includes a first adjustment ring, a second adjustment ring and an adjustment bolt, which is easy to operate, can improve the adaptability of the sand scoop to different soil environments, and can adjust the amount of clods or stones passing through the spiral blade per unit time, reducing the possibility of soil pushing.

[0025] The present invention arranges a plurality of split steel cables between the starting end and the end end of the spiral blade, thereby being able to cut larger stones or soil blocks and reduce their size, making it easier for the soil blocks or stones to enter and exit the sand hopper. At the same time, one end of the split steel cable is fixed, and the other end is connected by a screw and a nut, which can adapt to the spiral blade with a changing pitch and ensure its normal operation.

[0026] The cover plate of the present invention includes a hinged plate and a baffle plate. The hinged plate is hinged to the side wall of the bottom of the sand hopper, and the baffle plate is coaxially rotatably connected to the hinged plate. When the two are staggered, the bottom of the sand hopper is blocked. When they overlap, channels are formed on both sides to facilitate the entry of soil. A baffle bar is provided on the side of the hinged plate to control the rotation angle of the baffle plate so that the two stop after rotating relative to each other for a certain angle, thereby ensuring normal drilling and soil discharge. A counterweight block is provided on the baffle plate away from the hinged position. When the sand hopper of the drilling collapse hole is pulled out, the baffle plate can be driven to rotate to a position overlapping with the hinged plate. The tendency of the baffle plate to rotate relative to the hinged plate can also be weakened to avoid affecting soil discharge.

[0027] The invention incorporates a return spring mounted on the unlocking lever extending from the sand hopper. During normal drilling, the return spring moves the unlocking lever upward, allowing the hook to tightly engage the buckle on the hinged plate, securing the cover. During a hole collapse, soil from the collapsed hole falls onto the spiral blades, forcing them to press the elastic member downward, driving the unlocking lever downward and releasing the hook from the buckle on the hinged plate, automatically opening the bottom of the sand hopper. This is a quick and convenient solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of an anti-buried drill and sand bailing hopper of a rotary drilling rig provided in one embodiment of the present invention;

[0029] Figure 2 for Figure 1 A partial enlarged view of part A of the anti-buried drill and sand scoop structure of a rotary drilling rig provided in one embodiment;

[0030] Figure 3 for Figure 1 A right side view of the anti-buried drill and sand scoop structure of a rotary drilling rig provided in one embodiment;

[0031] Figure 4 for Figure 3 A cross-sectional view of the anti-buried drill and sand bailing bucket structure of a rotary drilling rig provided in one embodiment along XX;

[0032] Figure 5 for Figure 4 A partial enlarged view of part B of the anti-buried drill and sand scoop structure of a rotary drilling rig provided in one embodiment;

[0033] Figure 6 for Figure 1 A top view of an anti-buried drill and sand bailing hopper structure of a rotary drilling rig provided in one embodiment;

[0034] Figure 7 for Figure 6 A cross-sectional view of the anti-buried drill and sand scoop structure of a rotary drilling rig provided in one embodiment along line YY;

[0035] Figure 8 for Figure 7A partial enlarged view of part C of the anti-buried drill and sand scoop structure of a rotary drilling rig provided in one embodiment;

[0036] Figure 9 A diagram showing the bottom of the anti-buried drilling and sand bailing hopper structure of a rotary drilling rig provided by one embodiment of the present invention is open;

[0037] Figure 10 This is a diagram showing the bottom of the anti-buried drill and sand bailing bucket structure of the rotary drilling rig provided by one embodiment of the present invention in an open state from another angle.

[0038] in:

[0039] 100, sand scoop; 110, opening; 120, connecting rib; 130, connecting sleeve; 140, pin; 150, hinge plate; 151, stop bar; 160, shielding plate; 161, counterweight; 170, drill bit; 180, drive shaft; 190, limit key;

[0040] 200, spiral blade; 201, starting end; 202, ending end; 210, elastic member; 220, first adjustment ring; 230, second adjustment ring; 240, limiting groove; 250, adjusting bolt; 260, splitting cable; 270, screw; 280, nut;

[0041] 300, unlocking lever; 310, return spring; 320, hook; 330, hook portion; 340, connecting portion. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, 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 intended to limit the present invention.

[0043] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0044] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0045] Refer to the following Figures 1-10 The following describes an anti-buried drill and sand bailing bucket structure of a rotary drilling rig provided by the present invention.

[0046] A rotary drilling rig anti-buried drilling sand hopper structure includes a sand hopper 100. A cover plate is provided at the bottom of the sand hopper 100, which can block or open the bottom of the sand hopper 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 on the top of the sand hopper 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 mechanical arm of a conveyor vehicle. 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 hopper 100 to rotate around its own axis. The sand hopper 100 drives the cover plate, and the cover plate drives the plurality of drill bits 170 in a row to start drilling.

[0047] The outer peripheral axial sliding sleeve of the drive shaft 180 is provided with a spiral blade 200, which is located above the sand hopper 100. The drive shaft 180 drives the spiral blade 200 to rotate synchronously. When the spiral blade 200 rotates, the soil in the borehole can be transported upward or downward. When the borehole collapses, the sand hopper 100 and the drill bit 170 will be buried in the borehole and difficult to remove. At this time, the drive shaft 180 rotates in the opposite direction to drive the spiral blade 200 to rotate in the opposite direction synchronously. The spiral blade 200 transports the soil inside the borehole to the inside of the sand hopper 100, that is, transports the soil downward. The mechanical arm of the conveying vehicle pulls the sand hopper 100 upward, and at the same time, the cover at the bottom of the sand hopper 100 is opened. When the sand hopper 100 is pulled out of the collapsed borehole, the soil inside it can be discharged from the sand hopper 100 to prevent the soil from hindering the sand hopper 100 from being pulled out of the collapsed borehole.

[0048] An unlocking rod 300 is axially slidably provided at the upper end of the sand hopper 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 hopper 100. When the unlocking rod 300 moves downward along the axial direction of the sand hopper 100, the cover plate can be released. The cover plate is no longer restricted by the unlocking rod 300. The cover plate opens under the action of the gravity of the soil inside the sand hopper 100, thereby discharging the soil inside the sand hopper 100.

[0049] An elastic member 210 is provided between the spiral blade 200 and the sand hopper 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 hopper 100. The elastic member 210 can make the spiral blade 200 have a tendency 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 hopper 100 is drilling normally, the gravity of the spiral blade 200 itself can compress the elastic member 210. The degree of compression of the elastic member 210 is relatively high. The bottom of the spiral blade 200 is far away from the top of the unlocking rod 300. When the well collapses, the inner wall of the well collapses. Since the spiral blade 200 is located above the sand scoop 100, the soil on the inner wall of the well will fall on the spiral blade 200. The spiral blade 200 is pressed down by the gravity of the soil, thereby further compressing the elastic part 210. When the spiral blade 200 compresses the elastic part 210, it pushes the unlocking rod 300, thereby causing the unlocking rod 300 to move downward, so that the unlocking rod 300 releases the restriction on the cover plate.

[0050] It should be noted that, in the prior art, when a drilling hole collapses, the sand hopper 100 is generally discarded or a large amount of manpower and material resources are used to dig out the sand hopper 100 again. However, in the present invention, a spiral blade 200 is provided above the sand hopper 100, so that when the drilling hole collapses, the spiral blade 200 rotates in the opposite direction to discharge the collapsed soil from the inside of the sand hopper 100, thereby making it more convenient to remove the sand hopper 100, and removing the sand hopper 100 has almost no impact on the drilling.

[0051] In order to allow soil to enter the sand hopper 100 from the top of the present invention, two openings 110 are provided at the bottom of the sand hopper 100 . The two openings 110 enable soil to enter the sand hopper 100 under the transportation of the spiral blades 200 .

[0052] Specifically, in order to enable the spiral blade 200 to rotate synchronously with the drive shaft 180, a limit key 190 is fixedly provided on the outer periphery of the preset area of ​​the drive shaft 180. The limit key 190 is arranged along the axial direction of the drive shaft 180, and a limit groove 240 extending along the axial direction of the spiral blade 200 is opened on the inner periphery of the spiral blade 200. The limit key 190 is located in the limit groove 240. When the drive shaft 180 rotates, the spiral blade 200 is driven to rotate by 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 drive shaft 180. When the spiral blade 200 slides axially outside the preset area, that is, the limit groove 240 on the inner periphery of the spiral blade 200 is disengaged from the limit key 190, the spiral blade 200 no longer rotates synchronously with the drive shaft 180. The effect of such a setting is as follows:

[0053] When the spiral blade 200 transports a lot of soil, there will be too much soil between the spiral blade 200 and the sand hopper 100. Since the speed at which the soil enters the sand hopper 100 is lower than the transport speed of the spiral blade 200, the soil between the spiral blade 200 and the sand hopper 100 gradually increases, thereby pushing 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, so the spiral blade 200 stops transporting soil. When the soil between the spiral blade 200 and the sand hopper 100 gradually enters the sand hopper 100, the spiral blade 200 can gradually reset and then continue to transport soil. By setting the limit key 190 in the preset area, the soil accumulation caused by the fast speed of the spiral blade 200 transporting soil can be effectively avoided.

[0054] More specifically, Figure 1 and Figure 3 As shown, in order to facilitate the connection between the sand hopper 100 and the drive shaft 180, four connecting ribs 120 are fixedly provided on the top of the sand hopper 100. The four connecting ribs 120 are vertically connected to the top of the sand hopper 100. The four connecting ribs 120 do not block the two openings 110. The four connecting ribs 120 are commonly connected to a connecting sleeve 130. Two first pin holes are provided on the side wall of the connecting sleeve 130, and two second pin holes are provided 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, the connecting pins 140 are inserted into the first pin holes and the second pin holes to connect the sand hopper 100 to the drive shaft 180.

[0055] In a further embodiment, the spiral blade 200 of the present invention is provided with an adjustment component, which 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 clods in the soil.

[0056] Specifically, such as Figure 2 、 Figure 3 and Figure 8 As shown, the adjustment assembly includes a first adjustment ring 220 and a second adjustment ring 230. The first adjustment ring 220 and the second adjustment ring 230 are both axially slidably arranged on the outer periphery of the drive shaft 180. The outer peripheries of the first adjustment ring 220 and the second adjustment ring 230 are fixedly connected to the upper and lower parts of the inner periphery of the spiral blade 200 respectively. A plurality of adjustment bolts 250 are provided between the first adjustment ring 220 and the second adjustment ring 230. The adjustment bolts 250 connect the first adjustment ring 220 and the second adjustment ring 230, and the plurality of adjustment bolts 250 can adjust the distance between the first adjustment ring 220 and the second adjustment ring 230 when they rotate around their own axes. When the first adjustment ring 220 and the second adjustment ring 230 are rotated, the distance between the first adjustment ring 220 and the second adjustment ring 230 can be adjusted. When the distance between the adjustment ring 220 and the second adjustment ring 230 changes, the pitch of the spiral blade 200 can be changed. When the first adjustment ring 220 and the second adjustment 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 end 202 of the spiral blade 200 is increased, so that the gap can accommodate larger soil or stones. When the first adjustment ring 220 and the second adjustment 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 end 202 of the spiral blade 200 is reduced, so that the size of the stones or soil accommodated in the gap is reduced.

[0057] It should be noted that the inner ring of the spiral blade 200 in this embodiment is spiral. When the first adjustment ring 220 is fixedly connected to the upper part of the inner circumference of the spiral blade 200, the spiral upper part of the inner ring of the spiral blade 200 is fixedly connected to the outer circumference of the first adjustment ring 220. Similarly, when the second adjustment ring 230 is fixedly connected to the lower part of the inner circumference of the spiral blade 200, the spiral lower part of the inner ring of the spiral blade 200 is fixedly connected to the outer circumference of the second adjustment ring 230. The material of the spiral blade 200 is a rigid material. When the first adjustment ring 220 and the second adjustment ring 230 move away from or close to each other, they can drive the upper and lower spiral parts of the inner circumference of the spiral blade 200 to move closer or away from each other, thereby changing the pitch of the spiral blade 200.

[0058] In order to facilitate the first adjustment ring 220 and the second adjustment ring 230 to rotate synchronously with the drive shaft 180 and to be able to slide axially on the drive shaft 180, the limiting grooves 240 in the present invention are respectively opened on the inner circumference of the first adjustment ring 220 and the second adjustment ring 230, and the limiting grooves 240 on the inner circumference of the first adjustment ring 220 and the second adjustment ring 230 are slidingly connected with the limiting keys 190 on the outer circumference of the drive shaft 180. The first adjustment ring 220 and the second adjustment ring 230 rotate synchronously with the drive shaft 180 through the limiting grooves 240 and the limiting keys 190 and slide axially along the drive shaft 180.

[0059] More specifically, in this embodiment, a splitting steel cable 260 is provided at the gap between the spiral blades 200, that is, Figure 7 and Figure 8 A splitting steel cable 260 is connected between the starting end 201 and the end 202 of the spiral blade 200 shown. There are multiple splitting steel cables 260, and the multiple splitting steel cables 260 are evenly distributed between the starting end 201 and the end 202. The multiple splitting steel cables 260 can cut larger stones or soil blocks, so that the size of the large-sized stones or soil blocks is reduced, which facilitates the soil blocks or stones to enter and discharge from the sand hopper 100.

[0060] It should be noted that in order to make the dividing steel cable 260 adapt to the spiral blade 200 with a variable pitch, one of the two ends of the dividing steel cable 260 in this embodiment is fixedly set on the top of the spiral blade 200, and a screw 270 is fixed on the other end. The screw 270 passes through the bottom of the spiral blade 200, and a nut 280 is set at the bottom of the spiral blade 200. The setting of the nut 280 and the screw 270 can adapt to the spiral blade 200 with a variable pitch.

[0061] Specifically, such as Figure 4 and Figure 5 As shown, a hook 320 is hinged on the side wall of the sand hopper 100 in this embodiment, and the hook 320 is used to realize the function of the unlocking rod 300 to limit or release the cover plate. The hook 320 has a hook portion 330 and a connecting portion 340. The intersection of the hook portion 330 and the connecting portion 340 of the hook 320 is hinged on the side wall of the bottom of the sand hopper 100. The hook portion 330 of the hook 320 contacts one end of the cover plate, and the connecting portion 340 of the hook 320 is hinged to the bottom end of the unlocking rod 300. When the unlocking rod 300 moves axially along the sand hopper 100, it can drive the hook 320 to rotate around the hinge position, so that the hook portion 330 of the hook 320 can hook one end of the cover plate or release one end of the cover plate.

[0062] In a further embodiment, Figure 9 and Figure 10As 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 bottom side wall of the sand hopper 100. A buckle is provided on the other end of the hinged plate 150. The buckle can contact the hook portion 330 of the hook 320 to be engaged with the bottom of the sand hopper 100. The shielding plate 160 is coaxial with the hinged plate 150 and is rotatably connected. The shielding plate 160 can rotate a certain angle relative to the hinged plate 150. The multiple drill bits 170 of the present invention are fixedly arranged at the bottom of the shielding plate 160. Figure 10 As shown, the shielding plate 160 and the hinged plate 150 have the same shape, and both the shielding plate 160 and the hinged plate 150 are in the shape of a number 8 or an hourglass. When the shielding plate 160 and the hinged plate 150 are staggered, they can form a complete circle, thereby completely blocking the bottom of the sand hopper 100. When the shielding plate 160 and the hinged plate 150 overlap, the bottom of the sand hopper 100 is no longer blocked but can allow the drilled soil to enter the sand hopper 100. When the sand hopper 100 is full of soil, drilling is stopped and the drive shaft 180 rotates in the opposite direction to drive the sand hopper 100 to stop drilling. The movable hinge plate 150 rotates relative to the baffle plate 160. When the hinge plate 150 and the baffle plate 160 are in a staggered state, the hinge plate 150 and the baffle plate 160 block the bottom of the sand hopper 100. The sand hopper 100 is then taken out of the well. After being taken out, the restriction of the hook 320 on the hinge plate 150 is released, the bottom of the sand hopper 100 is opened, and the soil inside the sand hopper 100 is discharged. After the soil is discharged, the hinge plate 150 is restricted again, and the sand hopper 100 is put into the well to continue drilling. This reciprocating process is repeated until the drilling is completed.

[0063] It should be noted that, in order to enable the hinge plate 150 and the shielding plate 160 to stop rotating after rotating relative to each other at a certain angle, Figure 10 As shown, in this embodiment, a blocking bar 151 is provided on the side of the hinge plate 150. The blocking bar 151 is perpendicular to the hinge plate 150. When the shielding plate 160 rotates to contact the blocking bar 151 on the side of the hinge plate 150, it cannot continue to rotate, so that the shielding plate 160 and the hinge plate 150 overlap. When the shielding plate 160 and the hinge plate 150 overlap, there will be channels on both sides. Such a structural setting allows soil to enter the sand hopper 100 during the drilling process. When the sand hopper 100 is driven to rotate by the drive shaft 180, due to the hinge The connecting plate 150 is hinged to the bottom side wall of the sand scoop 100, so the hinged plate 150 rotates synchronously with the sand scoop 100, and the drill bit 170 at the bottom of the shielding plate 160 contacts the drilling soil. The unlocked shielding plate 160 will rotate in the opposite direction relative to the hinged plate 150. At this time, the shielding plate 160 contacts the baffle bar 151 on the side wall of the hinged plate 150 and then rotates synchronously. The drill bit 170 at the bottom of the shielding plate 160 rotates synchronously with the shielding plate 160, the hinged plate 150 and the sand scoop 100, so that the drill bit 170 can drill.

[0064] It should also be noted that when the soil inside the sand hopper 100 is filled, the hinged plate 150 and the baffle plate 160 need to be staggered to block the sand hopper 100, and the soil inside the sand hopper 100 is brought out when the sand hopper 100 leaves the drilling well. When the sand hopper 100 is drilling normally, the hinged plate 150 and the baffle plate 160 at the bottom of the sand hopper 100 are in an overlapping state, so it is necessary to drive the sand hopper 100 in the reverse direction. The reverse rotation of the sand hopper 100 drives the hinged plate 150 to rotate in the reverse direction relative to the baffle plate 160 so that the side of the baffle plate 160 contacts the other side of the baffle bar 151. At this time, the hinged plate 150 and the baffle plate 160 are in a staggered state, so that the soil inside the sand hopper 100 can be brought out.

[0065] In a further embodiment, a counterweight 161 is fixedly provided on the shielding plate 160, and the counterweight 161 is specifically located at a position on the shielding plate 160 away from the hinged position of the hinged plate 150. The setting of the counterweight 161 makes it possible for the shielding plate 160 and the hinged plate 150 to overlap when the sand hopper 100 is pulled out during the drilling collapse. Since the position of the counterweight 161 is away from the hinged position, the counterweight 161 can drive the shielding plate 160 to rotate to a position overlapping with the hinged plate 150 under the action of gravity, and the counterweight 161 can reduce the tendency of the shielding plate 160 to rotate relative to the hinged plate 150 to a certain extent, thereby preventing the shielding plate 160 and the hinged plate 150 from affecting the discharge of soil inside the sand hopper 100.

[0066] More specifically, in this embodiment, the unlocking rod 300 extending out of the sand scoop 100 is provided with a return spring 310 on the outer periphery thereof. 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 of the sand scoop 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, thereby causing the unlocking rod 300 to pull the connecting portion 340 of the hook 320 to have a tendency to rotate upward, which also causes the hook 320 to rotate upward. The hook portion 330 of 320 tightly hooks the buckle on the hinge plate 150. When the drilling hole collapses, the soil in the collapsed hole falls on the spiral blade 200, and 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 of the unlocking rod 300, it drives the unlocking rod 300 to move downward as a whole, so that the hook portion 330 of the hook 320 is separated from the buckle of the hinge plate 150, and the hinge plate 150 is rotated around the hinge position to open the sand hopper 100.

[0067] The specific working process of the anti-buried drill sand scoop structure of the rotary drilling rig provided by the present invention is described in combination with the above embodiments:

[0068] adjust:

[0069] Before starting drilling, the soil conditions of the drilling area are first obtained, and the average size of the soil blocks or stones in the soil is obtained. The pitch of the spiral blade 200 is adjusted according to the obtained data, that is, the distance between the first adjustment ring 220 and the second adjustment ring 230 is adjusted so that the gap between the upper and lower ends of the spiral blade 200 can pass through soil blocks or stones of an appropriate size. At the same time, the dividing steel cable 260 between the upper and lower ends of the spiral blade 200 is adjusted so that the dividing steel cable 260 adapts to the distance between the upper and lower ends of the spiral blade 200, thereby ensuring that the dividing steel cable 260 is in a tensioned state.

[0070] Drilling:

[0071] The operator drives the transport vehicle, and the mechanical arm on the transport vehicle makes the buckle of the hinged plate 150 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 bucket 100 to rotate synchronously. The mechanical arm of the transport vehicle aligns the sand bucket 100 with the drilling position and presses it down. When the sand bucket 100 rotates, the hinged plate 150 at the bottom is driven to rotate synchronously. The shielding plate 160 rotatably connected to the hinged plate 150 rotates relative to the hinged plate 150. When the shielding plate When the shielding plate 160 rotates to contact the bar 151 on the side of the hinged plate 150, the shielding plate 160 and the hinged plate 150 are relatively stationary, and the shielding plate 160 overlaps with the hinged plate 150. A channel is formed on both sides of the hinged plate 150 and the shielding plate 160. When the sand hopper 100 rotates, the drill bit 170 at the bottom of the shielding plate 160 starts drilling. The drilled soil enters the sand hopper 100 through the channel at the bottom of the sand hopper 100. When the soil inside the sand hopper 100 is filled, the driving shaft 1 80 degrees in the opposite direction, the shielding plate 160 rotates in the opposite direction relative to the hinge plate 150, so that the shielding plate 160 and the hinge plate 150 are staggered. At this time, the shielding plate 160 and the hinge plate 150 block the bottom of the sand hopper 100. Then the operator controls the mechanical arm of the conveying vehicle to remove the sand hopper 100 from the drilling well. After removing the sand hopper 100, the operator presses the unlocking lever 300, so that the unlocking lever 300 pushes the hook 320 to rotate, and the hook 320 no longer restricts the hinge plate 15 0, the hinged plate 150 rotates around the hinged position under the action of gravity, thereby opening the bottom of the sand hopper 100 and discharging the soil inside the sand hopper 100. After the soil is discharged, the buckle of the hinged plate 150 is re-engaged with the hook portion 330 of the hook 320, and the sand hopper 100 is placed in the drill well. The driving shaft 180 drives the sand hopper 100 to rotate again to drill the soil. The sand hopper 100 is filled with soil again and then taken out again. This cycle is repeated until the drilling is completed.

[0072] Drilling hole collapse:

[0073] If the well collapses, the sand scoop 100, the spiral blade 200 and the drill bit 170 will all be buried in the well, and the soil in the well will fall on 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 hinged position, so that the hook portion 330 of the hook 320 releases the restriction on the hinged plate 150. The operator controls the mechanical arm of the conveying vehicle to pull the sand scoop 100 and reversely drive the sand scoop 100 to rotate. The spiral blade 200 on the drive shaft 180 rotates synchronously in the opposite direction to start The soil on the spiral blade 200 is transported downward, and the soil is further crushed after passing through the dividing steel cable 260 between the starting end 201 and the end end 202 of the spiral blade 200. The soil enters the sand hopper 100, and the soil pushes the hinged plate 150 to rotate around the hinged position to open the bottom of the sand hopper 100. When the sand hopper 100 moves upward and under the action of the counterweight 161, the shielding plate 160 rotates around the rotation center to a position overlapping with the hinged plate 150. In the process of the sand hopper 100 being pulled out, the counterweight 161 can reduce the rotation angle of the shielding plate 160 relative to the hinged plate 150, preventing the shielding plate 160 and the hinged plate 150 from being stuck in the drilled well when the shielding plate 160 rotates a large angle.

[0074] If there is a lot of soil between the spiral blade 200 and the sand hopper 100, it will push the spiral blade 200 to move upward on the drive shaft 180. When the soil reaches a certain level, the mechanical arm of the conveying vehicle can no longer pull the sand hopper 100. At this time, when the spiral blade 200 moves upward until the limit groove 240 on the inner circumference of the first adjustment ring 220 and the second adjustment ring 230 disengages from the limit key 190, the spiral blade 200 stops rotating and stops conveying soil. The operator drives the drive shaft 180 through the mechanical arm to repeatedly switch the rotation direction, so that the soil between the spiral blade 200 and the sand hopper 100 gradually enters the sand hopper 100. When the soil decreases, the spiral blade 200 will gradually reset, thereby preventing excessive soil from accumulating between the spiral blade 200 and the sand hopper 100.

[0075] When the spiral blade 200 is reset, the soil is continued to be transported, and the mechanical arm of the transport vehicle continues to pull the drive shaft 180 to move upward, and the drive shaft 180 drives the sand scoop 100 to move upward to escape from the collapsed borehole.

[0076] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0077] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A rotary drilling rig anti-buried drill sand hopper structure, characterized in that: include: A sand scoop, wherein a cover plate is hingedly connected to the bottom of the sand scoop, a plurality of drill bits are provided on the bottom end of the cover plate, and a drive shaft is coaxially and fixedly provided on the top of the sand scoop; A spiral blade is axially and slidably sleeved on the outer periphery of the drive shaft and located above the sand scoop. When the spiral blade is within a preset area of ​​the drive shaft, it rotates synchronously with the drive shaft. When the drilling hole collapses, the spiral blade rotates in the opposite direction to transport the collapsed soil into the sand scoop. An unlocking rod, the unlocking rod being axially slidably disposed at the top of the sand scoop and located below the spiral blade, the unlocking rod being used to open or restrict the cover plate; A hook is hinged on the side wall of the bottom of the sand scoop, the intersection of the hook portion and the connecting portion of the hook is the hinge center, the end of the connecting portion of the hook away from the hinge center is hinged to the bottom of the unlocking rod, and the hook portion of the hook hooks the cover plate; an elastic member, the elastic member being located between the spiral blade and the sand scoop, and the elastic member being capable of causing the spiral blade to tend to move away from the unlocking rod; The outer periphery of the unlocking rod extending out of the sand hopper is provided with a return spring, and the return spring makes the unlocking rod tend to move upward. During normal drilling, the return spring makes the unlocking rod move upward, and fixes the cover plate through the hook. When the hole collapses during drilling, the soil in the collapsed hole falls on the spiral blade, causing the spiral blade to squeeze the elastic part and move downward, driving the unlocking rod downward, causing the hook to detach from the cover plate, and automatically opening the bottom of the sand hopper.

2. The anti-buried drill sand hopper structure of the rotary drilling rig according to claim 1, characterized in that: The outer periphery of the preset area of ​​the drive shaft is provided with an axially arranged limiting key, and the inner periphery of the spiral blade is provided with an axially extending limiting groove.

3. The anti-buried drill sand hopper structure of the rotary drilling rig according to claim 1, characterized in that: The spiral blade is provided with an adjustment component, which can adjust the pitch of the spiral blade. The pitch of the spiral blade is positively correlated with the size of stones or clods in the soil.

4. The anti-buried drill sand hopper structure of the rotary drilling rig according to claim 3, characterized in that: The adjustment assembly includes a first adjustment ring and a second adjustment ring. The first adjustment ring and the second adjustment ring are coaxial and slidably sleeved on the outer circumference of the drive shaft. The first adjustment ring and the second adjustment ring are respectively fixedly connected to the upper and lower parts of the inner ring of the spiral blade. A plurality of adjustment bolts are arranged between the first adjustment ring and the second adjustment ring.

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

6. The anti-buried drill sand hopper structure of the rotary drilling rig according to claim 1, characterized in that: The cover plate includes a hinged plate and a shielding plate. One end of the hinged plate is hinged to the bottom side wall of the sand hopper, and the other end of the hinged plate is engaged with the sand hopper through an unlocking rod. The shielding plate is coaxially and rotatably arranged on the lower end surface of the hinged plate. The shielding plate has the same shape as the hinged plate, and multiple drill bits are arranged on the lower end surface of the shielding plate. When the shielding plate and the hinged plate overlap, through holes are formed on both sides. When the shielding plate and the hinged plate are staggered, the bottom of the sand hopper is blocked.

7. The anti-buried drill sand hopper structure of the rotary drilling rig according to claim 6, characterized in that: A blocking bar is provided on the side of the hinge plate, and the blocking bar is perpendicular to the hinge plate.

8. The anti-buried drill sand hopper structure of the rotary drilling rig according to claim 7, characterized in that: The shielding plate is fixedly provided with a counterweight block, and the counterweight block is away from the hinge position of the hinge plate.

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