Mechanical rotary excavating expanded bore pile hole cleaning device

Abstract

The utility model provides a mechanical rotary excavating expanded bore pile hole cleaning device which comprises first hole cleaning petals, a plurality of first hole cleaning petals are movably connected to form a cylindrical hole cleaning structure, and a first scraper is arranged on the outer wall of the cylindrical hole cleaning structure. The multiple second hole cleaning petals are movably connected to form an inverted-cone-shaped hole cleaning structure arranged at the bottom of the cylindrical hole cleaning structure, and a second scraper is arranged on the outer wall of the inverted-cone-shaped hole cleaning structure; and the folding and unfolding assembly is located in the cylindrical hole cleaning structure and used for driving the first hole cleaning valve to fold and unfold in the radial direction of the cylindrical hole cleaning structure or driving the second hole cleaning valve to fold and unfold in the radial direction of the inverted-cone-shaped hole cleaning structure. According to the hole cleaning device, the cylindrical hole cleaning structure and the inverted-cone-shaped hole cleaning structure are folded and unfolded, so that muck in the expanded-diameter section in the expanded-base pile hole is cleaned, and the bearing capacity of a pile foundation in follow-up construction can be improved; and through the design of the folding and unfolding assembly, the linkage performance of the first hole cleaning valve and the second hole cleaning valve is enhanced, and the hole cleaning construction efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pile hole hole cleaning equipment technical field especially is a kind of mechanical rotary digging bottom expanding pile hole cleaning device. BACKGROUND

[0002] Mechanical rotary digging bottom expanding pile is a new type of pile foundation construction method, using rotary drilling rig to form hole in pile body, after reaching the designed pile foundation depth, replace rotary drill bit with bottom expanding drill bit, form pot bottom-shaped enlarged head at the bottom of pile body, finally carry out pile bottom slag removal work, complete the hole forming of pile foundation, then carry out steel reinforcement cage and concrete pouring operation, finally complete the construction of pile foundation. Compared with ordinary cast-in-place pile, rotary bottom expanding pile can effectively utilize the strength of pile body concrete, utilize the advantage of larger area of enlarged head, provide greater foundation bearing capacity, reduce pile length and save investment.

[0003] The thickness of sediment at the bottom of hole is the key point of quality control of mechanical rotary drilling cast-in-place pile, according to the regulation: before pouring concrete, the thickness of sediment at the bottom of hole should not be greater than 50mm for end bearing pile. For non-bottom expanding rotary drilling cast-in-place pile, generally use hole cleaner to clean hole after hole forming is completed, through several times of hole cleaning, make the sediment at the bottom of pile meet the design requirements. For rotary drilling bottom expanding pile, the traditional hole cleaner can only clean the sediment within the diameter of pile body, but cannot effectively clean the sediment at the enlarged head part, so that the thickness of sediment at the part outside the diameter of pile body in enlarged head is larger, which seriously affects the bearing capacity of pile foundation. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing mechanical rotary drilling bottom expanding pile hole cleaning device to solve the problems in the above background.

[0005] The utility model adopts the technical scheme: a kind of mechanical rotary drilling bottom expanding pile hole cleaning device, it includes:

[0006] Hole cleaning petal one, several hole cleaning petal one movably connect into cylindrical hole cleaning structure, the outer wall of the cylindrical hole cleaning structure is equipped with scraper one;

[0007] Hole cleaning petal two, several hole cleaning petal two movably connect into inverted conical hole cleaning structure arranged at the bottom of the cylindrical hole cleaning structure, the outer wall of the inverted conical hole cleaning structure is equipped with scraper two;

[0008] Retracting and expanding assembly, the retracting and expanding assembly is located inside the cylindrical hole cleaning structure, to drive the hole cleaning petal one along the radial direction of the cylindrical hole cleaning structure retracting and expanding, or drive the hole cleaning petal two along the radial direction of the inverted conical hole cleaning structure retracting and expanding.

[0009] Further, the retractable assembly comprises a telescopic device, a movable guide rod and a sliding sleeve, the telescopic device is arranged at the top of the cylindrical hole cleaning structure; the movable guide rod is coaxially arranged in the cylindrical hole cleaning structure, and the top end is connected with the telescopic device; the sliding sleeve is sleeved on the bottom end of the movable guide rod; the hole cleaning flap one and the hole cleaning flap two are connected with the movable guide rod and the sliding sleeve through movable connecting rods.

[0010] Further, the movable connecting rod three is a telescopic rod, and the top end of the hole cleaning flap two is rotationally connected with the bottom end of the hole cleaning flap one.

[0011] The movable connecting rod one is rotationally connected with the movable guide rod and the hole cleaning flap one at both ends;

[0012] The movable connecting rod two is rotationally connected with the hole cleaning flap one and the sliding sleeve at both ends;

[0013] The movable connecting rod three is rotationally connected with the sliding sleeve and the hole cleaning flap two at both ends.

[0014] Further, the movable connecting rod three is a telescopic rod, and the top end of the hole cleaning flap two is rotationally connected with the bottom end of the hole cleaning flap one.

[0015] Further, the top end of the cylindrical hole cleaning structure is provided with a mounting seat, and the retractable assembly is arranged on the mounting seat; the top end of the hole cleaning flap one is rotationally connected with the bottom end of the mounting seat.

[0016] Further, the mounting seat is provided with a connecting block, and the connecting block is detachably connected with a rotary drilling rod.

[0017] Further, the scraper one is distributed along the circumference of the cylindrical hole cleaning structure, and the end portion, away from the hole cleaning flap one, extends along the tangent direction of the cylindrical hole cleaning structure.

[0018] Further, the scraper two is distributed along the circumference of the inverted conical hole cleaning structure, and the end portion, away from the hole cleaning flap two, extends along the tangent direction of the inverted conical hole cleaning structure.

[0019] Further, the hole cleaning flap two is provided with a slag collecting hole, and the two ends of the slag collecting hole are respectively communicated with the inner side and the outer side of the inverted conical hole cleaning structure.

[0020] The utility model has the beneficial effects that: through the retractable cylindrical hole cleaning structure and the inverted conical hole cleaning structure, the slag soil cleaning of the diameter expansion section of the under-reaming pile hole is implemented, and the bearing capacity of the subsequent pile foundation construction can be improved; through the special design of the retractable assembly, the linkage of the hole cleaning flap one and the hole cleaning flap two is enhanced, the operation difficulty of the hole cleaning device can be reduced, and the hole cleaning construction efficiency is improved; through the arrangement of the retractable assembly and the movable connecting rod three, the hole cleaning device can clean the holes of rotary drilling under-reaming piles with different diameters, and the universality of the device is improved. Attached Figure Description

[0021] Figure 1 This is an overall structural diagram of an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram illustrating the unfolding process of the cylindrical hole-cleaning structure and the inverted conical hole-cleaning structure in the embodiments of this utility model;

[0023] Figure 3 This is a schematic diagram of the shrinkage process of the cylindrical hole-cleaning structure and the inverted conical hole-cleaning structure in the embodiments of this utility model;

[0024] Figure 4 This is a top view schematic diagram of the cylindrical hole-clearing structure in an embodiment of this utility model;

[0025] Figure 5 This is a top view schematic diagram of the inverted conical hole clearing structure in an embodiment of this utility model;

[0026] Figure 6 This is an appendix to the embodiments of this utility model. Figure 5 Schematic diagram of the cross section of AA';

[0027] Figure 7 This is an appendix to the embodiments of this utility model. Figure 6 Schematic diagram of the cross section of BB'.

[0028] In the picture:

[0029] 1. Cylindrical cleaning structure; 11. One cleaning flap; 12. One scraper;

[0030] 2. Inverted conical cleaning hole structure; 21. Two cleaning hole flaps; 22. Two scrapers; 23. Slag collection hole;

[0031] 3. Retraction and extension components; 31. Telescopic device; 32. Movable guide rod; 33. Sliding sleeve; 34. Movable link one; 35. Movable link two; 36. Movable link three;

[0032] 4. Mounting bracket;

[0033] 5. Connecting block. Detailed Implementation

[0034] The technical solutions of the embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0035] In the description of the embodiments of the utility model, it is understood that the orientation or position relationship indicated by the terms "top", "bottom" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In the description of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] Reference drawings Figures 1-7 The utility model embodiment provides a kind of mechanical rotary digging and expanding bottom pile hole cleaning device, it includes: hole cleaning petal one 11, hole cleaning petal two 21, scraper one 12, scraper two 22, retraction and expansion component 3, mounting seat 4 and connecting block 5, hole cleaning petal one 11 and hole cleaning petal two 21 are respectively arranged with several, the top end of hole cleaning petal one 11 is rotatably connected the bottom end of mounting seat 4, several hole cleaning petal one 11 is surrounded and is set into cylindrical hole cleaning structure 1 in the bottom of mounting seat 4, scraper one 12 is arranged on the outer wall of cylindrical hole cleaning structure 1;The top end of hole cleaning petal two 21 is rotatably connected the bottom end of hole cleaning petal one 11, several hole cleaning petal two 21 is surrounded and is set into inverted conical hole cleaning structure 2 in the bottom of cylindrical hole cleaning structure 1, scraper two 22 is arranged on the outer wall of inverted conical hole cleaning structure 2, in addition, hole cleaning petal two 21 is further provided with residue collection hole 23, and the both ends of residue collection hole 23 are communicated with the inner side and the outer side of inverted conical hole cleaning structure 2 respectively;Retraction and expansion component 3 is partially arranged on mounting seat 4, and part is inserted into cylindrical hole cleaning structure 1, for driving hole cleaning petal one 11 along the radial direction of cylindrical hole cleaning structure 1 retraction and expansion, or driving hole cleaning petal two 21 along the radial direction of inverted conical hole cleaning structure 2 retraction and expansion;Connecting block 5 is located at the top of mounting seat 4, and is detachably connected with rotary digging machine drill rod, and the specific structure shape can be selected by the person skilled in the art, not more specific limitation is made here, for example, the structure shape for connecting rotary digging machine drill rod on rotary digging machine drill bit can be referred to to design connecting block 5 in the embodiment.

[0037] When the hole cleaning device is used for hole cleaning construction of the expanded base pile hole, the connecting block 5 is first connected with the rotary drilling rod, and the hole cleaning device is lowered into the expanded base pile hole by the rotary drilling rod. The hole cleaning device first passes through the constant diameter section of the expanded base pile hole. At this time, the hole cleaning device is rotated by the rotary drilling rod, and the cutter 1 on the outer wall of the cylindrical hole cleaning structure 1 is used to remove the spoil in the constant diameter section. Then, the hole cleaning device is continuously lowered to the diameter expansion section of the expanded base pile hole, the expansion and contraction assembly 3 is started to drive the hole cleaning petal 1 to expand along the radial direction of the cylindrical hole cleaning structure 1 and drive the hole cleaning petal 2 to expand along the radial direction of the inverted conical hole cleaning structure 2. At this time, the hole cleaning device is rotated by the rotary drilling rod, the cutter 1 on the outer wall of the cylindrical hole cleaning structure 1 is used to remove the spoil in the diameter expansion section, and the cutter 2 on the outer wall of the inverted conical hole cleaning structure 2 is used to remove the spoil at the bottom of the pile hole. The spoil falling into the bottom of the pile and originally in the bottom of the pile is removed through the spoil collecting hole 3 in the hole cleaning petal 2 and enters the inside of the inverted conical hole cleaning structure 2. Finally, the expansion and contraction assembly 3 is started to drive the hole cleaning petal 1 to contract along the radial direction of the cylindrical hole cleaning structure 1 and return to the original position, and drive the hole cleaning petal 2 to contract along the radial direction of the inverted conical hole cleaning structure 2 and return to the original position, so as to leave the spoil in the hole cleaning device. The hole cleaning device is lifted out of the expanded base pile hole by the rotary drilling rod. After the spoil is removed, the above-mentioned actions are repeated until the hole cleaning operation is completed.

[0038] By using the above-mentioned device, the spoil in the diameter expansion section of the expanded base pile hole can be removed by expanding and contracting the cylindrical hole cleaning structure 1 and the inverted conical hole cleaning structure 2, so as to improve the bearing capacity of the pile foundation in subsequent construction.

[0039] Reference is made to the accompanying drawings Figures 2-3 The expansion and contraction assembly 3 includes a telescopic device 31, a movable guide rod 32 and a sliding sleeve 33. The telescopic device 31 is arranged at the top of the cylindrical hole cleaning structure 1, and the telescopic end thereof faces the inside of the cylindrical hole cleaning structure 1. The movable guide rod 32 is coaxially arranged in the inside of the cylindrical hole cleaning structure 1, and the top end thereof is connected with the telescopic device 31. The sliding sleeve 33 is sleeved with the bottom end of the movable guide rod 32. The hole cleaning petal 1 and the hole cleaning petal 2 are connected with the movable guide rod 32 and the sliding sleeve 33 through movable connecting rods. The expansion and contraction actions of the hole cleaning petal 1 and the hole cleaning petal 2 are driven by the telescopic action of the telescopic device 31.

[0040] More specifically, the movable connecting rods include a movable connecting rod 1 34, a movable connecting rod 2 35 and a movable connecting rod 3 36. The two ends of the movable connecting rod 1 34 are respectively rotationally connected with the movable guide rod 32 and the hole cleaning petal 1. The two ends of the movable connecting rod 2 35 are respectively rotationally connected with the hole cleaning petal 1 and the sliding sleeve 33. The two ends of the movable connecting rod 3 36 are respectively rotationally connected with the sliding sleeve 33 and the hole cleaning petal 2. Reference is made to the accompanying drawings Figures 2-3In some preferable technical solutions, the top end of the movable connecting rod one 34 is directed towards the movable guide rod 32, the top end of the movable connecting rod two 35 is directed towards the hole cleaning valve one 11, and the top end of the movable connecting rod three 36 is directed towards the sliding sleeve 33, and the movable connecting rod three 36 is preferably a telescopic rod. When it is necessary to retract and expand the hole cleaning valve one 11 and the hole cleaning valve two 21, the telescopic device 31 and the movable connecting rod three 36 are preferably linked in a way that the telescopic device 31 and the movable connecting rod three 36 are elongated, which respectively drives the movable guide rod 32 to move downwards, drives the sliding sleeve 33 to move upwards, and drives the hole cleaning valve two 21 to move radially outwards along the inverted conical hole structure 2. Under the cooperation of the movable guide rod 32 and the sliding sleeve 33, the top end of the movable connecting rod one 34 moves downwards, the bottom end of the movable connecting rod two 35 moves upwards, and the hole cleaning valve one 11 is further driven to move radially outwards along the cylindrical hole structure 1, so as to realize the expansion of the hole cleaning valve one 11 and the hole cleaning valve two 21. The retraction of the hole cleaning valve one 11 and the hole cleaning valve two 21 is opposite to the above process, and details are not described herein.

[0041] In order to realize the linkage control of the telescopic device 31 and the movable connecting rod three 36, the telescopic device 31 can be selected as a hydraulic cylinder or the like, and the movable connecting rod three 36 can be selected as an electric telescopic rod or the like, and automatic control can be realized through a solenoid valve, a programmable system controller or the like.

[0042] Reference is made to the accompanying drawings Figures 4-7 The scraper one 12 is distributed along the circumference of the cylindrical hole structure 1, and the end thereof away from the hole cleaning valve one 11 extends along the tangent direction of the cylindrical hole structure 1. The scraper two 22 is distributed along the circumference of the inverted conical hole structure 2, and the end thereof away from the hole cleaning valve two 21 extends along the tangent direction of the inverted conical hole structure 2, so as to efficiently and high-quality clean the muck in the pile hole.

[0043] Compared with the prior art, the beneficial effects of the utility model lie in that the muck in the diameter expansion section of the expanded base pile hole is cleaned through the retraction and expansion of the cylindrical hole structure 1 and the inverted conical hole structure 2, which can improve the bearing capacity of the pile foundation in subsequent construction. Through the special design of the retraction and expansion assembly 3, the linkage of the hole cleaning valve one 11 and the hole cleaning valve two 21 is enhanced, which can reduce the operation difficulty of the hole cleaning device and improve the efficiency of the hole cleaning construction. Through the arrangement of the retraction and expansion assembly 3 and the movable connecting rod three 36, the hole cleaning device can clean the hole of the rotary digging expanded base pile with different diameters, which improves the universality of the device.

[0044] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

[0045] The above is the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, under the premise that a number of improvements and refinements can be made, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A mechanical rotary dig and under-ream pile hole cleaning device, characterized by, The utility model relates to a kind of rotary drilling machine, including: Clearing hole flap one, several described clearing hole flap one movably connect into cylindrical clear hole structure, the outer wall of the cylindrical clear hole structure is equipped with scraper one; Clearing hole flap two, several described clearing hole flap two movably connect into the inverted conical clear hole structure arranged at the bottom of the cylindrical clear hole structure, the outer wall of the inverted conical clear hole structure is equipped with scraper two; Retracting and expanding assembly, the retracting and expanding assembly is located inside the cylindrical clear hole structure, to drive the clearing hole flap one along the radial direction of the cylindrical clear hole structure retracting and expanding, or drive the clearing hole flap two along the radial direction of the inverted conical clear hole structure retracting and expanding.

2. The mechanical auger pile hole cleaning device of claim 1, wherein, The retracting and expanding assembly includes telescopic device, movable guide rod and sliding sleeve, the telescopic device is arranged at the top of the cylindrical clear hole structure;The movable guide rod is coaxially arranged inside the cylindrical clear hole structure, and top end is connected with the telescopic device;The sliding sleeve is sleeved on the bottom end of the movable guide rod;The clearing hole flap one and the clearing hole flap two are connected with the movable guide rod and the sliding sleeve by movable connecting rod.

3. The mechanical auger pile hole cleaning device of claim 2, wherein, The movable connecting rod includes: Movable connecting rod one, both ends of the movable connecting rod one are rotatably connected with the movable guide rod and the clearing hole flap one respectively; Movable connecting rod two, both ends of the movable connecting rod two are rotatably connected with the clearing hole flap one and the sliding sleeve respectively; Movable connecting rod three, both ends of the movable connecting rod three are rotatably connected with the sliding sleeve and the clearing hole flap two respectively.

4. The mechanical auger pile hole cleaning device of claim 3, wherein, The movable connecting rod three is telescopic rod, and the top end of the clearing hole flap two is rotatably connected with the bottom end of the clearing hole flap one.

5. The mechanical hole cleaning device according to any one of claims 1 to 4, wherein, The top end of the cylindrical clear hole structure is provided with mounting seat, and part of the retracting and expanding assembly is arranged on the mounting seat, and the top end of the clearing hole flap one is rotatably connected with the bottom end of the mounting seat.

6. The mechanical auger pile hole cleaning device of claim 5, wherein, The mounting seat is provided with connecting block, and the connecting block can be detachably connected with rotary drilling machine drill rod.

7. The mechanical auger pile hole cleaning device according to any one of claims 1-4, 6, wherein, The scraper one is distributed with several along the circumferential direction of the cylindrical clear hole structure, and the end portion away from the clearing hole flap one extends along the tangent direction of the cylindrical clear hole structure.

8. The mechanical auger pile hole cleaning device of claim 7, wherein, The scraper two is distributed with several along the circumferential direction of the inverted conical clear hole structure, and the end portion away from the clearing hole flap two extends along the tangent direction of the inverted conical clear hole structure.

9. The mechanical rotary excavating and under-reaming pile hole cleaning device according to any one of claims 1-4, 6, 8, wherein, The clearing hole flap two is provided with slag collecting hole, and both ends of the slag collecting hole are respectively communicated with the inside and outside of the inverted conical clear hole structure.

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