CN117988707B - Bridge pile foundation drilling device - Google Patents
Bridge pile foundation drilling device Download PDFInfo
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- CN117988707B CN117988707B CN202410396752.8A CN202410396752A CN117988707B CN 117988707 B CN117988707 B CN 117988707B CN 202410396752 A CN202410396752 A CN 202410396752A CN 117988707 B CN117988707 B CN 117988707B
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- 238000005553 drilling Methods 0.000 title claims abstract description 69
- 230000036346 tooth eruption Effects 0.000 claims abstract description 22
- 239000002002 slurry Substances 0.000 claims description 121
- 238000010992 reflux Methods 0.000 claims description 40
- 230000005484 gravity Effects 0.000 claims description 17
- 239000010720 hydraulic oil Substances 0.000 claims description 15
- 239000011268 mixed slurry Substances 0.000 claims description 10
- 238000004064 recycling Methods 0.000 claims description 7
- 239000003921 oil Substances 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 5
- 230000008602 contraction Effects 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 18
- 238000010276 construction Methods 0.000 abstract description 9
- 238000005299 abrasion Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 description 10
- 238000005086 pumping Methods 0.000 description 10
- 230000007423 decrease Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The invention relates to the technical field of bridge construction drilling piles, in particular to a bridge pile foundation drilling device which is used for solving the problem that the existing device influences the construction efficiency by frequently replacing drill bits aiming at different strata; the lower part of the drill cylinder is connected with two cutting plates, and cutting teeth are arranged on the two cutting plates; the two cutting plates can synchronously and reversely swing; when the included angle between the two cutting plates is increased, the cutting teeth eat stratum and the stratum volume is increased; when the included angle between the cutting plates is increased, the cutting plates eat the soil layer, so that the soil taking speed of the cutting plates is increased when the drilling barrel rotates, the cutting plates are suitable for drilling softer soil layers, otherwise, the soil eating amount of the cutting plates is reduced, the abrasion of the cutting teeth by harder strata is reduced, the drilling is carried out on the strata with different hardness, and the drilling efficiency is improved without frequently switching the drill bit in the drilling process.
Description
Technical Field
The invention relates to the technical field of bridge construction drilling piles, in particular to a bridge pile foundation drilling device.
Background
In bridge pile foundation construction, the drilling device is one of key construction equipment, the performance of the drilling device is directly related to the construction efficiency and quality, a traditional drilling device usually adopts a single cutting mode, the penetration stratum quantity of cutting teeth of the traditional drilling device is fixed, and the drilling device is difficult to adapt to stratum changes with different hardness.
Therefore, when the conventional drilling device is used for coping with different strata, the drill bit is frequently replaced or cutting parameters are adjusted, so that not only is the construction cost increased, but also the drilling efficiency is reduced, in addition, the construction progress and quality can be affected by frequent replacement of the drill bit, and the uncertainty of engineering is increased.
Disclosure of Invention
The invention provides a bridge pile foundation drilling device, which aims at solving the problem that the construction efficiency is affected by the fact that the drill bit needs to be frequently replaced aiming at different strata in the existing device.
In order to alleviate the technical problems, the technical scheme provided by the invention is as follows:
The bridge pile foundation drilling device comprises a drilling mechanism, wherein the drilling mechanism comprises a drill rod, and a drill cylinder is connected to the drill rod;
The lower part of the drill cylinder is connected with two cutting plates, and cutting teeth are arranged on the two cutting plates;
The two cutting plates can synchronously and reversely swing;
when the included angle between the two cutting plates is increased, the stratum eating amount of the cutting teeth is increased;
And when the included angle between the two cutting plates is reduced, the cutting teeth eat the stratum and the stratum is reduced.
Still further, the hydraulic control system further comprises a pressure control and flow change mechanism, wherein the pressure control and flow change mechanism comprises a pressure tank with hydraulic oil inside;
The middle part of the drill cylinder is coaxially connected with a fixedly arranged hydraulic rod, and the output end of the hydraulic rod is connected with a first rack with two teeth oppositely arranged;
The two cutting plates are connected with first gears, and the two first gears are respectively meshed with the two first racks;
An oil pipe is communicated between the hydraulic rod and the pressure box;
the pressure box applies pressure to the hydraulic rod so as to enable the hydraulic rod to extend, and therefore the included angle between the two cutting plates is in a maximum state;
When the drill rod moves downwards and enables the two cutting plates to be abutted against the hard stratum, the two cutting plates swing relatively and the included angle is reduced, so that the first gear rotates and pushes the first rack to move upwards, and the hydraulic rod overcomes the pressure shrinkage of the pressure box.
Furthermore, two protruding blocks are symmetrically arranged on the inner wall of the drill cylinder, and when the hydraulic rod stretches to the maximum length, the two cutting plates are respectively abutted against the two protruding blocks.
Further, a pressurizing block is connected in the pressure box in a sliding way, and the side wall of the pressurizing block is attached to the inner wall of the pressure box;
the pressurizing block divides the inner space of the pressure tank into a hydraulic oil accommodating cavity and a cavity, a spring is arranged in the cavity, and two ends of the spring are respectively connected with the pressurizing block and the pressure tank.
Further, the pressure control and flow change mechanism further comprises a first slurry accommodating groove, a second slurry accommodating groove, a mixed slurry recycling groove and a T-shaped pipe which are excavated on the ground;
the viscosity and the specific gravity of the slurry in the first slurry containing tank are higher than those of the slurry in the second slurry containing tank;
The mixed slurry recovery tank is used for recovering mixed slurry used in the first slurry containing tank and the second slurry containing tank;
Three ports of the T-shaped pipe are respectively connected with the first slurry accommodating groove, the second slurry accommodating groove and the pile hole drilled by the drill cylinder;
Valves are arranged on the parts, connected to the first slurry accommodating groove and the second slurry accommodating groove, of the T-shaped pipe;
when the included angle between the two cutting plates is reduced, a valve close to the first slurry containing groove is changed from a closed state to an open state;
When the included angle between the two cutting plates is continuously reduced, the opening of the valve close to the first slurry containing groove is gradually increased;
And when the opening of the valve close to the first slurry accommodating groove is increased to the maximum state and the included angle between the two cutting plates is continuously reduced, the opening of the valve close to the second slurry accommodating groove is gradually reduced.
Further, the pressurizing block is connected with a supporting rod, the supporting rod is connected with two second racks, and valve rods of the two valves are respectively connected with second gears matched with the two second racks;
When the included angle between the two cutting plates is reduced, the supporting rod axially slides to a direction approaching to the second gear;
When the support rod axially slides towards the direction close to the second gear, the second gear on the valve close to the first mud accommodating groove is meshed with the corresponding second rack first, and when the support rod keeps moving, the second gear on the valve close to the first mud accommodating groove is separated from the meshed state with the corresponding second rack, and the other second gear is meshed with the corresponding second rack.
Further, both of the valves are fixedly connected to the pressure tank;
And one section of the T-shaped pipe connected with the pile hole is fixedly connected with the pressure box.
Still further, the device also comprises a reflux control mechanism, wherein the reflux control mechanism comprises a first reflux groove connected with the pile hole and the mixed mud recovery groove and a second reflux groove connected with the pile hole and the second mud containing groove;
The first reflux groove and the second reflux groove are internally provided with a swingable baffle plate, and the first reflux groove or the second reflux groove can be closed when the baffle plate swings;
when the valve close to the first slurry containing groove is closed, the baffle in the first reflux groove is in a lower swinging state, and the baffle in the second reflux groove is in an upper swinging state, so that the first reflux groove is closed, and the second reflux groove is opened;
when the valve close to the first slurry containing groove is opened, the baffle in the first reflux groove is in an upper swinging state, and the baffle in the second reflux groove is in a lower swinging state, so that the first reflux groove is opened, and the second reflux groove is closed.
Further, the backflow control mechanism further comprises two brackets, and the two baffles are respectively hinged to the two brackets;
the two brackets are respectively erected on the upper parts of the first reflux groove and the second reflux groove.
Further, the backflow control mechanism further comprises two arc-shaped air cylinders, and two ends of each arc-shaped air cylinder are respectively connected with the corresponding bracket and the corresponding baffle;
The pressure box is connected with a piston cylinder, a piston plate is connected to the piston cylinder in a sliding manner, a piston rod is connected to the piston plate, the end part of the piston rod is connected with a sliding block, and a sliding groove matched with the sliding block is formed in the side wall of the supporting rod;
and the spaces in the piston cylinder, which are positioned on two sides of the piston plate, are respectively communicated with the two arc-shaped cylinders through air pipes.
The beneficial effects of the invention are analyzed as follows:
The bridge pile foundation drilling device comprises a drilling mechanism, wherein the drilling mechanism comprises a drill rod, and a drill cylinder is connected to the drill rod; the lower part of the drill cylinder is connected with two cutting plates, and cutting teeth are arranged on the two cutting plates; the two cutting plates can synchronously and reversely swing; when the included angle between the two cutting plates is increased, the cutting teeth eat stratum and the stratum volume is increased; when the included angle between the two cutting plates is reduced, the cutting teeth eat the stratum and the stratum is reduced.
The swing angle of the two cutting plates can be changed, the two cutting plates can reversely rotate at the same time by the same angle, so that the included angle between the two cutting plates can be changed when the two cutting plates swing, when the included angle between the cutting plates is increased, the distance that the cutting teeth on the cutting plates protrude out of the lower part of the mounting ring is increased, the soil taking speed of the cutting plates is increased when the drilling barrel rotates, the drilling barrel is suitable for drilling softer soil layers, otherwise, the soil taking speed of the cutting plates is reduced when the drilling barrel rotates, the abrasion of the cutting teeth by harder strata is reduced, drilling of strata with different hardness is avoided, and the drilling efficiency is improved without frequent switching of the drill bit in the drilling process.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the related art, the drawings that are required to be used in the description of the embodiments or the related art will be briefly described, and it is apparent that the drawings in the description below are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the whole structure of the present invention;
FIG. 3 is a schematic view of the structure of the drill barrel of the present invention;
FIG. 4 is a schematic view of the structure of the cutting plate of the present invention;
FIG. 5 is a schematic view of the structure of the hydraulic lever of the present invention;
FIG. 6 is a schematic view of the structure of the pressurizing block of the present invention;
FIG. 7 is a schematic view of the structure of the T-shaped pipe of the present invention;
Fig. 8 is a schematic view of the structure of the baffle plate of the present invention.
Icon:
100. A drilling mechanism; 110. a drill rod; 120. drilling a cylinder; 121. a bump; 130. a column; 140. a hydraulic rod; 141. a first rack; 150. a mounting ring; 160. a cutting plate; 161. a first gear; 162. a rotating shaft; 200. a pressure control and flow change mechanism; 210. a pressure tank; 220. an oil pipe; 230. pressurizing the block; 240. a spring; 250. a support rod; 260. a T-shaped tube; 270. a valve; 271. a second gear; 272. a second rack; 280. a first slurry accommodating tank; 281. a second slurry accommodating tank; 290. a mixed slurry recovery tank; 300. a reflux control mechanism; 310. a first reflow tank; 320. a second reflux groove; 330. a taper rod; 331. a bracket; 332. a baffle; 333. an arc-shaped cylinder; 340. a piston cylinder; 341. an air pipe; 350. a piston rod; 351. a piston plate; 352. a sliding block.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Examples
1-8, A bridge pile foundation drilling device comprises a drilling mechanism 100, wherein the drilling mechanism 100 comprises a drill rod 110, and a drill cylinder 120 is connected to the drill rod 110; the lower part of the drill cylinder 120 is connected with two cutting plates 160, and cutting teeth are arranged on the two cutting plates 160; the two cutting plates 160 may swing in opposite directions in synchronization; as the angle between the two cutting plates 160 increases, the cutter penetration increases; as the angle between the two cutting plates 160 decreases, the amount of cutter penetration into the formation decreases.
The working mechanism of the bridge pile foundation drilling device provided by the embodiment is as follows:
The drill rod 110 is connected to drilling equipment, the drilling equipment provides power for rotation and up-and-down movement, the drill pipe 120 is connected to the bottom end of the drill rod 110, the drill pipe 110 can drive the drill pipe 120 to drill the bottom layer to form a pile hole when rotating and moving downwards, two cutting plates 160 at the bottom of the drill pipe 120 cut the ground when the drill pipe 120 rotates, so that other substances such as bottom soil enter the drill pipe 120, after the soil in the drill pipe 120 is fully accommodated, the drill pipe 110 is lifted, the soil in the drill pipe 120 is discharged, and the drilling of bridge pile foundation is completed to form the pile hole in a circulating mode;
The bottom of the drill barrel 120 is also connected with a mounting ring 150, the mounting ring 150 is rotatably connected to the drilling end of the drill barrel 120, the cutting plate 160 is rotatably connected in the mounting ring 150 through a rotating shaft 162, the mounting ring 150 can swing relative to the drill barrel 120, so that the drill barrel 120 can be in a state of discharging internal substances and a drilling state, the mounting ring 150 firstly moves downwards relative to the drill barrel 120 before swinging relative to the drill barrel 120, then swings relative to the drill barrel 120, the relative axial movement and swinging between the mounting ring 150 and the drill barrel 120 are controlled by a hydraulic system of the device, and by arranging two hydraulic cylinders, one hydraulic cylinder controls the mounting ring 150 to move axially relative to the drill barrel 120, and then the other hydraulic rod 140 controls the mounting ring 150 to swing;
The swinging angle of the two cutting boards 160 can be changed, and the two cutting boards 160 can reversely rotate at the same time by the same angle, so that the included angle between the two cutting boards 160 can be changed when the two cutting boards 160 swing, when the included angle between the cutting boards 160 is increased, the distance that the cutting teeth on the cutting boards 160 protrude out of the lower part of the mounting ring 150 is increased, at the moment, the soil taking speed of the cutting boards 160 is increased when the drill cylinder 120 rotates, the drill cylinder is suitable for drilling softer soil layers, otherwise, the soil taking speed of the cutting boards 160 is reduced, and although the soil taking speed is reduced when the drill cylinder 120 rotates, the abrasion of the cutting teeth by harder strata is reduced, so that the drill cylinder can drill into the strata with different hardness, and the drill bit is not required to be frequently switched in the drilling process, thereby improving the drilling efficiency.
How the angle of the cutting plate 160 changes, specifically:
The hydraulic control system further comprises a pressure control and flow change mechanism 200, wherein the pressure control and flow change mechanism 200 comprises a pressure tank 210 with hydraulic oil arranged inside; the middle part of the drill cylinder 120 is coaxially connected with a fixedly arranged hydraulic rod 140, and the output end of the hydraulic rod 140 is connected with a first rack 141 with two teeth oppositely arranged; the two cutting plates 160 are connected with first gears 161, and the two first gears 161 are respectively meshed with the two first racks 141; an oil pipe 220 is communicated between the hydraulic rod 140 and the pressure tank 210; the pressure tank 210 applies pressure to the hydraulic rod 140 to elongate the hydraulic rod 140 so that an angle between the two cutting plates 160 is at a maximum state; when the drill rod 110 moves down and the two cutting plates 160 are abutted against the hard formation, the two cutting plates 160 swing relatively and the included angle is reduced, so that the first gear 161 rotates and pushes the first rack 141 up to cause the hydraulic rod 140 to contract against the pressure of the pressure tank 210.
The pressure tank 210 is communicated with the hydraulic rod 140 through the oil pipe 220, and enough pressure is provided in the pressure tank 210, so that when the cutting plates 160 do not contact with the stratum or the contacted stratum is softer, the pressure in the pressure tank 210 is transmitted into the hydraulic rod 140 through hydraulic oil, the hydraulic rod 140 is in an extending state, so that the first gear 161 on the cutting plates 160 is pushed by the first gear rack 141 at the output end of the hydraulic rod 140 in the state, the included angle between the two cutting plates 160 is in a maximum state, the drilling speed of the drill cylinder 120 can be improved, along with the rotation of the drill cylinder 120, when the cutting plates 160 contact with the hard stratum and the drill cylinder 120 is in a downward moving state, the cutting plates 160 are blocked by the hard stratum and swing, the included angle between the two cutting plates 160 is reduced, the abrasion speed of cutting teeth on the cutting plates 160 is reduced, and the continuous drilling effect can be achieved, when the two cutting plates 160 swing to reduce the included angle between the two cutting plates, the first gear 161 rotates along with the swing of the cutting plates 160, and at the moment, the rotating first gear 161 pushes the first gear rack 141 to move upwards, so that the hydraulic rod 140 is shortened, hydraulic oil in the hydraulic rod 140 enters the pressure tank 210 through the oil pipe 220, and as the drilling of the drilling barrel 120 continues, after the drilling barrel 120 drills into a softer stratum, the resistance of the stratum to the cutting plates 160 is reduced, so that the hydraulic oil in the pressure tank 210 is acted by pressure again and enters the hydraulic rod 140, at the moment, the included angle between the two cutting plates 160 is increased, so that the drilling speed of the drilling barrel 120 is improved, and the self-adaptive adjustment of the angle of the cutting plates 160 according to the stratum hardness is realized through the cooperation of the structures such as the pressure tank 210 and the hydraulic rod 140, namely, the drilling speed is ensured, and the abrasion of cutting teeth on the cutting plates 160 is reduced;
Column 130 is fixedly connected to the middle of drill cylinder 120 coaxially, and hydraulic rod 140 is fixedly connected to column 130, thereby ensuring stable engagement of first gear rack 141 with first gear 161.
Regarding how to limit the angle of the cutting plate 160, specifically:
Two protruding blocks 121 are symmetrically arranged on the inner wall of the drill cylinder 120, and when the hydraulic rod 140 extends to the maximum length, the two cutting plates 160 are respectively abutted against the two protruding blocks 121.
The bump 121 is connected to the inner wall of the drill barrel 120 and is disposed at the tilting end of the cutting plate 160, so as to limit the maximum included angle between the two cutting plates 160, and ensure that the distance of the cutting teeth of the cutting plate 160, which protrude out of the drill barrel 120, is limited, so that the abrasion speed of the cutting teeth is avoided, and meanwhile, the drilled soil and other substances are guided into the drill barrel 120.
In the alternative of this embodiment, it is preferable that:
A pressurizing block 230 is connected in a sliding manner in the pressure box 210, and the side wall of the pressurizing block 230 is attached to the inner wall of the pressure box 210; the pressurizing block 230 divides the inner space of the pressure tank 210 into a hydraulic oil accommodating chamber and a cavity, a spring 240 is provided in the cavity, and both ends of the spring 240 are connected to the pressurizing block 230 and the pressure tank 210, respectively.
The pressure in the pressure tank 210 is realized by pushing the pressurizing block 230, the pressurizing block 230 is always pushed by the spring 240 to have a trend of moving towards the hydraulic oil accommodating cavity inside the pressurizing block, so that the included angle between the two cutting plates 160 is always in a trend of becoming larger, and the drilling barrel 120 drills the stratum vertically downwards, so that when the cutting plates 160 contact the hard stratum, the two cutting plates 160 are blocked to swing to be in a state that the included angle is reduced, and the cutting plates 160 can adaptively change the angle along with the hardness of the stratum;
The pressure environment in the pressure tank 210 may be implemented in other manners, such as injecting excessive hydraulic oil or making the pressure tank 210 of an elastic material, so that the pressure tank 210 has a tendency to shrink after being filled with hydraulic oil.
Regarding how to adapt to the viscosity and specific gravity of the slurry when the stratum with different hardness is drilled, in particular:
The pressure control and flow change mechanism 200 further comprises a first slurry accommodating groove 280, a second slurry accommodating groove 281, a mixed slurry recovering groove 290 and a T-shaped pipe 260 which are excavated on the ground; the viscosity and specific gravity of the slurry in the first slurry tank 280 are higher than those of the slurry in the second slurry tank 281; the mixed mud recycling tank 290 is used for recycling the mixed mud used in the first mud containing tank 280 and the second mud containing tank 281; three ports of the T-shaped pipe 260 are respectively connected with the first slurry accommodating groove 280, the second slurry accommodating groove 281 and the pile hole drilled by the drill cylinder 120; the T-pipe 260 is provided with valves 270 at portions connected to the first slurry receiving tank 280 and the second slurry receiving tank 281; when the included angle between the two cutting plates 160 is reduced, the valve 270 close to the first mud-holding tank 280 is changed from closed to open; as the angle between the two cutting plates 160 continues to decrease, the opening of the valve 270 near the first mud-holding tank 280 gradually increases; when the opening of the valve 270 near the first mud-holding tank 280 increases to the maximum state and the angle between the two cutting plates 160 continues to decrease, the opening of the valve 270 near the second mud-holding tank 281 gradually decreases.
When the stratum is drilled, slurry is required to be injected into the pile hole to keep the stability of the hole wall, prevent collapse and ensure smooth drilling process, and when the stratum with different hardness is drilled, the specific gravity and viscosity of the slurry are required to be changed;
When drilling hard rock, the strength of the hard rock is high, the stability is good, but the friction and impact force between the drill bit and the rock are large in the drilling process, so that a large amount of heat is easy to generate, at the moment, the viscosity of the slurry is increased, drill slag can be effectively carried and removed, better lubrication and cooling effects are provided, and the abrasion and heat accumulation of the drill bit are reduced;
When the soft soil is drilled, the soft soil stratum is usually loose and poor in stability, collapse and shrinkage cavity are easy to occur, at the moment, the side pressure on the hole wall can be reduced by reducing the specific gravity of the slurry, the collapse risk is reduced, meanwhile, the disturbance of the slurry on the soil layer can be reduced by the lower specific gravity, and the stability of the hole wall is maintained;
In this embodiment, the viscosity and specific gravity of the slurry in the first slurry tank 280 are higher than those of the slurry in the second slurry tank 281, and in the initial drilling state, the formation hardness near the earth surface is generally lower, so that the slurry in the second slurry tank 281 is pumped into the pile hole in the initial drilling state, and when the formation hardness is gradually increased, the slurry in the first slurry tank 280 and the slurry in the second slurry tank 281 can be mixed into the pile hole, at this time, the viscosity and specific gravity of the slurry entering into the pile hole are both increased, and then, as the formation hardness continues to be increased, the pumping amount of the slurry in the first slurry tank 280 is gradually increased, so that the viscosity and specific gravity of the slurry pumped into the pile hole are further increased, and when the formation hardness continues to be increased, the pumping amount of the slurry in the second slurry tank 281 is reduced, and the pumping amount of the slurry in the first slurry tank 280 is unchanged, so that the viscosity and specific gravity of the slurry can be further improved, and efficiency can be improved according to the change in the hardness of the drilled formation.
In the alternative of this embodiment, it is preferable that:
The pressurizing block 230 is connected with a supporting rod 250, the supporting rod 250 is connected with two second racks 272, and valve rods of the two valves 270 are respectively connected with second gears 271 matched with the two second racks 272; when the included angle between the two cutting plates 160 is reduced, the supporting rod 250 axially slides in a direction approaching the second gear 271; when the rod 250 axially slides in a direction approaching the second gear 271, the second gear 271 on the valve 270 approaching the first mud-holding tank 280 is first engaged with the corresponding second rack 272, and when the rod 250 is kept moving, the second gear 271 on the valve 270 approaching the first mud-holding tank 280 is disengaged from the engagement with the corresponding second rack 272, and the other second gear 271 is engaged with the corresponding second rack 272.
As the depth of drilling increases, the hardness of the formation may increase, the angle between the two cutting plates 160 becomes smaller, so that hydraulic oil enters the pressure tank 210, the pressurizing block 230 moves away from the hydraulic oil accommodating cavity, the pressurizing block 230 drives the strut 250 to move synchronously, the second rack 272 on the strut 250 near the first slurry accommodating groove 280 engages with and drives the second gear 271 on the valve 270 for controlling the slurry pumping in the first slurry accommodating groove 280 to rotate, the valve 270 for controlling the slurry pumping in the first slurry accommodating groove 280 is opened, and the angle between the two cutting plates 160 decreases as the hardness of the formation increases, accordingly, when the angle between the two cutting plates 160 decreases, the farther the pressurizing block 230 slides away from the hydraulic oil accommodating cavity, the larger the opening of the valve 270 for controlling the slurry pumping in the first slurry accommodating groove 280 increases, so that the viscosity and specific gravity of the slurry are increased, and the slurry is suitable for drilling on the hard formation;
And as the included angle between the two cutting plates 160 is further reduced, after the opening of the valve 270 controlling the pumping of the slurry in the first slurry accommodating groove 280 reaches the maximum, the second rack 272 controlling the valve 270 is separated from the engagement state with the second gear 271, while the second rack 272 of the valve 270 controlling the pumping of the slurry in the second slurry accommodating groove 281 is engaged with the second gear 271 on the valve 270, at this time, the continuous movement of the strut 250 will reduce the opening of the valve 270 controlling the pumping of the slurry in the second slurry accommodating groove 281 until closing, so that the pumping amount of the slurry with low specific gravity and viscosity in the second slurry accommodating groove 281 is reduced until disappearing, and the specific gravity and viscosity of the slurry pumped into the pile hole are further improved.
In the alternative of this embodiment, it is preferable that:
both valves 270 are fixedly connected to the pressure tank 210; a section of the T-pipe 260 connected to the pile hole is fixedly connected to the pressure tank 210.
Through with two valves 270 fixed connection on pressure box 210, guarantee the stable meshing of second rack 272 and second gear 271, the one end that T type pipe 260 connected the stake hole is the pump-out section of mud, with this section and pressure box 210 fixed connection to after fixing pressure box 210 subaerial, can guarantee that the pump-out end of T type pipe 260 steadily faces the stake hole, the port of the pump-out section of T type pipe 260 moves down along with boring the degree of depth in addition, guarantees that the mud impurity volume in bored concrete stake hole bottommost is minimum, promotes the effect of boring.
As to how to recover the mixed slurry, in particular:
Also included is a backflow control mechanism 300, the backflow control mechanism 300 comprising a first backflow groove 310 connected to the pile hole and the mixed mud recovery groove 290 and a second backflow groove 320 connected to the pile hole and the second mud containing groove 281; a swingable baffle 332 is arranged in each of the first reflux groove 310 and the second reflux groove 320, and the baffle 332 can close the first reflux groove 310 or the second reflux groove 320 when swinging; when the valve 270 close to the first mud containing groove 280 is closed, the baffle 332 in the first recirculation groove 310 is in a lower swing state, and the baffle 332 in the second recirculation groove 320 is in an upper swing state, so that the first recirculation groove 310 is closed and the second recirculation groove 320 is opened; when the valve 270 close to the first mud holding tank 280 is opened, the baffle 332 in the first recirculation tank 310 is in an up-swinging state, and the baffle 332 in the second recirculation tank 320 is in a down-swinging state, so that the first recirculation tank 310 is opened and the second recirculation tank 320 is closed.
After the slurry in the first slurry accommodating groove 280 and the second slurry accommodating groove 281 is pumped into the pile hole after being mixed, as the specific gravity and viscosity of the slurry after being mixed are changed, the slurry after being mixed needs to be recovered independently, when the slurry in the first slurry accommodating groove 280 and the second slurry accommodating groove 281 is not pumped into the pile hole, only the slurry in the second slurry accommodating groove 281 is pumped into the pile hole, at this time, the baffle 332 in the second slurry accommodating groove 320 swings upwards to open the second slurry accommodating groove 320, the baffle 332 in the first slurry circulating groove 310 swings downwards to close the first slurry circulating groove 310, so that the slurry in the pile hole flows back into the second slurry accommodating groove 281 through the second slurry circulating groove 320 for recycling, and when the slurry in the first slurry accommodating groove 280 and the second slurry accommodating groove 281 is mixed and injected into the pile hole, the baffle 332 in the second slurry circulating groove 320 swings downwards to close the second slurry circulating groove 320, the baffle 332 in the first slurry circulating groove 310 swings upwards to open the first slurry circulating groove 310, and the mixed slurry enters the first slurry circulating groove 310 to enter the second slurry circulating groove 281, so that the mixed slurry is prevented from being mixed, and the specific gravity of the slurry is not changed, and the slurry in the second slurry accommodating groove 281 is prevented from being recovered.
In the alternative of this embodiment, it is preferable that:
The backflow control mechanism 300 further comprises two brackets 331, and two baffles 332 are respectively hinged to the two brackets 331; the two brackets 331 are respectively erected on the upper parts of the first reflux groove 310 and the second reflux groove 320.
The two baffles 332 are connected by the support 331, the support 331 is connected with the conical rod 330, and the conical rod 330 pierces the ground to enable the baffles 332 to be fixedly installed.
In the alternative of this embodiment, it is preferable that:
The backflow control mechanism 300 further comprises two arc-shaped air cylinders 333, and two ends of the two arc-shaped air cylinders 333 are respectively connected with the corresponding bracket 331 and the baffle 332; the pressure box 210 is connected with a piston cylinder 340, the piston cylinder 340 is connected with a piston plate 351 in a sliding way, the piston plate 351 is connected with a piston rod 350, the end part of the piston rod 350 is connected with a sliding block 352, and the side wall of the supporting rod 250 is provided with a sliding groove matched with the sliding block 352; the spaces inside the piston cylinder 340 at both sides of the piston plate 351 are respectively communicated with the two arc cylinders 333 through air pipes 341.
When the strut 250 extends out of the pressure tank 210, mud in the first mud accommodating groove 280 and the second mud accommodating groove 281 is mixed and injected into pile holes, the strut 250 stretches, the inner wall of a chute on the strut 250 contacts with the sliding block 352, at the same time, the strut 250 drives the piston plate 351 to move, so that the piston cylinder 340 injects air to the arc-shaped air cylinder 333 on the second backflow groove 320 through the air pipe 341, the arc-shaped air cylinder 333 stretches, the corresponding baffle 332 is pushed to swing downwards so as to enable the second backflow groove 320 to be closed, meanwhile, the piston cylinder 340 extracts air in the arc-shaped air cylinder 333 on the first backflow groove 310 through the air pipe 341, the arc-shaped air cylinder 333 shortens so as to drive the corresponding baffle 332 to swing upwards, and the first backflow groove 310 is opened;
Since the pile hole has a depth, the amount of the slurry to be subsequently returned after the mixed slurry is injected into the pile hole is large and both viscosity and specific gravity are changed, therefore, when the strut 250 is contracted, the inner wall of the chute on the strut 250 is not in contact with the slider 352, so that the piston plate 351 does not slide relative to the piston cylinder 340, and further the first return groove 310 is maintained to be opened, and the second return groove 320 is maintained to be closed, thereby ensuring that the changed slurry is not returned into the second slurry accommodating groove 281.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limited thereto; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features can be replaced with equivalents; such modifications and substitutions do not depart from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. The bridge pile foundation drilling device comprises a drilling mechanism (100), wherein the drilling mechanism (100) comprises a drill rod (110), and a drill cylinder (120) is connected to the drill rod (110), and is characterized in that;
The lower part of the drill cylinder (120) is connected with two cutting plates (160), and cutting teeth are arranged on the two cutting plates (160);
the two cutting plates (160) can synchronously and reversely swing;
When the included angle between the two cutting plates (160) is increased, the cutting teeth eat into the stratum and increase;
when the included angle between the two cutting plates (160) is reduced, the cutting teeth eat into the stratum and the stratum is reduced;
the hydraulic control system further comprises a pressure control and flow change mechanism (200), wherein the pressure control and flow change mechanism (200) comprises a pressure tank (210) with hydraulic oil arranged inside;
The middle part of the drill cylinder (120) is coaxially connected with a fixedly arranged hydraulic rod (140), and the output end of the hydraulic rod (140) is connected with a first rack (141) with two teeth oppositely arranged;
The two cutting plates (160) are connected with first gears (161), and the two first gears (161) are respectively meshed with the two first racks (141);
An oil pipe (220) is communicated between the hydraulic rod (140) and the pressure box (210);
the pressure tank (210) applies pressure to the hydraulic rod (140) to elongate the hydraulic rod (140) so that an angle between the two cutting plates (160) is at a maximum state;
When the drill rod (110) moves downwards and enables the two cutting plates (160) to be abutted against a hard stratum, the two cutting plates (160) swing relatively and the included angle is reduced, so that the first gear (161) rotates and pushes the first rack (141) to move upwards, and the hydraulic rod (140) overcomes the pressure contraction of the pressure tank (210);
Two protruding blocks (121) are symmetrically arranged on the inner wall of the drill cylinder (120), and when the hydraulic rod (140) stretches to the maximum length, the two cutting plates (160) are respectively abutted against the two protruding blocks (121);
a pressurizing block (230) is connected in a sliding manner in the pressure box (210), and the side wall of the pressurizing block (230) is attached to the inner wall of the pressure box (210);
the pressurizing block (230) divides the internal space of the pressure tank (210) into a hydraulic oil accommodating cavity and a cavity, a spring (240) is arranged in the cavity, and two ends of the spring (240) are respectively connected with the pressurizing block (230) and the pressure tank (210);
the pressure control and flow change mechanism (200) further comprises a first slurry accommodating groove (280), a second slurry accommodating groove (281), a mixed slurry recycling groove (290) and a T-shaped pipe (260) which are excavated on the ground;
the viscosity and specific gravity of the slurry in the first slurry holding tank (280) are higher than those of the slurry in the second slurry holding tank (281);
the mixed mud recycling tank (290) is used for recycling mixed mud used in the first mud containing tank (280) and the second mud containing tank (281);
Three ports of the T-shaped pipe (260) are respectively connected with the first slurry accommodating groove (280), the second slurry accommodating groove (281) and a pile hole drilled by the drill cylinder (120);
the parts of the T-shaped pipe (260) connected with the first slurry accommodating groove (280) and the second slurry accommodating groove (281) are provided with valves (270);
When the included angle between the two cutting plates (160) is reduced, a valve (270) close to the first slurry accommodating groove (280) is changed from a closed state to an open state;
When the included angle between the two cutting plates (160) is continuously reduced, the opening of the valve (270) close to the first slurry accommodating groove (280) is gradually increased;
when the opening of the valve (270) close to the first slurry accommodating groove (280) is increased to a maximum state and the included angle between the two cutting plates (160) is continuously reduced, the opening of the valve (270) close to the second slurry accommodating groove (281) is gradually reduced;
The pressurizing block (230) is connected with a supporting rod (250), the supporting rod (250) is connected with two second racks (272), and valve rods of the two valves (270) are respectively connected with second gears (271) matched with the two second racks (272);
when the included angle between the two cutting plates (160) is reduced, the supporting rod (250) axially slides towards the direction approaching the second gear (271);
When the strut (250) axially slides in a direction approaching the second gear (271), the second gear (271) on the valve (270) approaching the first mud accommodating groove (280) is first engaged with the corresponding second rack (272), and when the strut (250) maintains moving, the second gear (271) on the valve (270) approaching the first mud accommodating groove (280) is disengaged from the engaged state with the corresponding second rack (272), and the other second gear (271) is engaged with the corresponding second rack (272).
2. The bridge pile foundation drilling device of claim 1, wherein;
Both valves (270) are fixedly connected to the pressure tank (210);
and a section of the T-shaped pipe (260) connected with the pile hole is fixedly connected with the pressure box (210).
3. The bridge pile foundation drilling device of claim 2, wherein;
Further comprising a backflow control mechanism (300), the backflow control mechanism (300) comprising a first backflow groove (310) connected to the pile hole and the mixed mud recovery groove (290) and a second backflow groove (320) connected to the pile hole and the second mud containing groove (281);
A swingable baffle plate (332) is arranged in each of the first reflux groove (310) and the second reflux groove (320), and the first reflux groove (310) or the second reflux groove (320) can be closed when the baffle plate (332) swings;
When the valve (270) close to the first slurry containing groove (280) is closed, the baffle (332) in the first reflux groove (310) is in a lower swinging state, and the baffle (332) in the second reflux groove (320) is in an upper swinging state, so that the first reflux groove (310) is closed, and the second reflux groove (320) is opened;
When the valve (270) close to the first slurry accommodating groove (280) is opened, the baffle (332) in the first reflux groove (310) is in a swinging state, and the baffle (332) in the second reflux groove (320) is in a swinging state, so that the first reflux groove (310) is opened, and the second reflux groove (320) is closed.
4. A bridge pile foundation drilling device according to claim 3, characterised in that;
the backflow control mechanism (300) further comprises two brackets (331), and the two baffles (332) are respectively hinged to the two brackets (331);
The two brackets (331) are respectively arranged at the upper parts of the first reflux groove (310) and the second reflux groove (320).
5. The bridge pile foundation drilling apparatus of claim 4, wherein;
the backflow control mechanism (300) further comprises two arc-shaped air cylinders (333), and two ends of the two arc-shaped air cylinders (333) are respectively connected with the corresponding bracket (331) and the baffle plate (332);
The pressure box (210) is connected with a piston cylinder (340), a piston plate (351) is connected in a sliding manner in the piston cylinder (340), a piston rod (350) is connected to the piston plate (351), a sliding block (352) is connected to the end part of the piston rod (350), and a sliding groove matched with the sliding block (352) is formed in the side wall of the supporting rod (250);
The spaces in the piston cylinder (340) at two sides of the piston plate (351) are respectively communicated with the two arc-shaped cylinders (333) through air pipes (341).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410396752.8A CN117988707B (en) | 2024-04-03 | Bridge pile foundation drilling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410396752.8A CN117988707B (en) | 2024-04-03 | Bridge pile foundation drilling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117988707A CN117988707A (en) | 2024-05-07 |
| CN117988707B true CN117988707B (en) | 2024-06-07 |
Family
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