CN217481198U - Hole drilling and expanding device - Google Patents

Abstract

The utility model discloses a drilling hole expanding device, which comprises a power rotating shaft and a cutter head expanding mechanism, wherein the bottom of the power rotating shaft is fixed with an inverted cone-shaped cutter head limiter, the cutter head expanding mechanism comprises a pair of longitudinal rods symmetrically arranged at two sides of the power rotating shaft, the bottom of each longitudinal rod is horizontally fixed with a cutter head bin, an expanding cutter head is in sliding fit in the cutter head bin, and an annular connecting spring is sleeved on the inverted cone-shaped cutter head limiter; a position adjusting mechanism is arranged between the vertical rod and the power rotating shaft. The longitudinal rod can adjust the relative height between the longitudinal rod and the inverted cone-shaped cutter head limiting device through the position adjusting mechanism, so that the position of the cutter head bin relative to the inverted cone-shaped cutter head limiting device is synchronously adjusted, under the action of the annular connecting spring, the diameter expanding cutter heads are in a state of being close to or far away from each other, and the cutting diameter of the diameter expanding cutter heads is changed. The utility model discloses a control hole enlargement blade disc forms pile foundation hole enlargement, can reduce the influence of crowded soil effect, is showing the bearing capacity that improves soft ground, improves the efficiency of construction.

Description

Hole drilling and expanding device

Technical Field

The utility model relates to an underground works field, concretely relates to drilling hole enlargement device can be used to pile foundation engineering well-formed bored concrete pile enlarges the diameter, increases pile foundation bearing capacity.

Background

A supporting disk pile is characterized by that at the target height position in the foundation soil, the extruding-expanding device of supporting disk machine is used to extrude and expand in proper soil layer to form the cast-in-place pile with supporting disk, and the expanding supporting disk is set to raise the bearing capacity of pile end, so that it can fully utilize the bearing capacity of pile end of soil body of every layer in the range of pile body to greatly raise the bearing capacity of single pile, reduce pile length of main pile body and reduce pile diameter or reduce pile number, therefore it can save cost or shorten construction period. Compared with the conventional common cast-in-place pile, the compressive bearing capacity and the uplift bearing capacity of the expanded diameter support disc pile are greatly improved, and because a part of load can be transmitted through the support disc, the method has the advantages of shortening the length of the pile, reducing the diameter of the pile or reducing the number of the piles to a certain extent under the condition of the same load, thereby realizing the engineering benefits of saving the manufacturing cost and shortening the construction period. As a novel expanding pile, the currently common construction method of an expanding support disc pile is to adopt a drilling machine to form a hole, and then adopt a special extruding and expanding device to expand outwards to form a support disc. Due to the complexity of the extruding and expanding process, for example, the extruding and expanding device cannot be molded at one time, and the target supporting disc effect can be achieved only by extruding and expanding for many times, so that the extruding and expanding efficiency is low, and the construction progress is seriously influenced. In addition, in the same building site, drilling disturbance or soil compaction effect of adjacent pile foundations can seriously affect the pile forming quality of the branch disc pile, so that the construction difficulty of the conventional expanding branch disc pile is high, and the application range is greatly limited.

Disclosure of Invention

The utility model provides a be not enough to prior art, the utility model aims at providing a drilling hole expanding device, the device adopt to cut the mode limit soon, adopt the mode formation rim plate of once cutting, avoid crowded each item problem that expands the complicacy of technology and lead to, can show improvement efficiency of construction, have obvious engineering benefit.

In order to achieve the above object, the utility model adopts the following technical scheme:

a hole drilling and expanding device comprises a power rotating shaft and a cutter head expanding mechanism, wherein an inverted cone-shaped cutter head limiter is fixed at the bottom of the power rotating shaft, and the central axes of the power rotating shaft and the inverted cone-shaped cutter head limiter are positioned on the same straight line; the cutter head expanding mechanism comprises a pair of longitudinal rods symmetrically arranged on two sides of the power rotating shaft, a cutter head bin is horizontally fixed at the bottom of each longitudinal rod, an expanding cutter head is placed in the cutter head bin, and the expanding cutter head penetrates through the cutter head bin and is in sliding fit with the cutter head bin; the diameter expanding cutter head comprises a cutter point part and a connecting part, and the cutter point part of the diameter expanding cutter head faces outwards; the inverted conical cutter head limiter is sleeved with an annular connecting spring, the connecting part of the expanding cutter head is connected with the annular connecting spring, and the connecting parts of the expanding cutter heads are always abutted against the side wall of the inverted conical cutter head limiter under the action of the annular connecting spring; be equipped with position control mechanism between vertical pole and the power pivot, vertical pole passes through position control mechanism can adjust its and the back taper blade disc stopper between the relative height to synchronous adjustment blade disc storehouse is for the position of back taper blade disc stopper. Under the action of the annular connecting spring, the expanding cutterheads are in a state of being close to or far away from each other, so that the cutting diameter of the expanding cutterheads is changed.

As a preferred technical scheme, the position adjusting mechanism comprises a longitudinal sliding mechanism arranged at the lower part of the power rotating shaft and a height adjusting mechanism arranged at the top of the power rotating shaft; the longitudinal rod can slide up and down in the vertical direction relative to the power rotating shaft through a longitudinal sliding mechanism; the height adjusting mechanism comprises a limiting rod vertically fixed at the top of the power rotating shaft, the middle part of the limiting rod is provided with a sliding groove along the axial direction of the limiting rod, a horizontal rod penetrates through the sliding groove, two ends of the horizontal rod are respectively rotatably connected with a pair of longitudinal rods at two sides of the power rotating shaft, and two ends of the horizontal rod are connected with locking nuts; the sliding groove comprises a plurality of limiting parts with arc-shaped longitudinal sections and connecting channels which are arranged at intervals in the vertical direction and are used for communicating the limiting parts, and the connecting channels are positioned between every two adjacent limiting parts; the middle part of the horizontal rod is provided with a clamping part which can rotate freely in the limiting part; the length of the long side of the longitudinal section of the clamping part is greater than the width of the channel of the connecting channel, and the length of the short side of the longitudinal section of the clamping part is less than the width of the channel of the connecting channel; the horizontal pole can make its joint portion be located not the spacing portion of co-altitude through the spout to reach the purpose of adjusting the vertical pole height. When the clamping portion is in a vertical state, the clamping portion can penetrate through the connecting channel.

In a further scheme, the longitudinal sliding mechanism comprises a sliding block fixed on the inner side of the longitudinal rod and a sliding rail fixedly connected with the power rotating shaft; the outer peripheral side of the power rotating shaft is fixedly connected with a connecting sleeve, and the sliding rail is fixedly connected with the power rotating shaft through the connecting sleeve. The sliding block is provided with a sliding groove with a square section, and the sliding block is in sliding fit with the sliding rail through the sliding groove; still be equipped with the anti-disengaging mechanism who prevents that the slider breaks away from the slide rail between slider and the slide rail. The anti-disengaging mechanism comprises anti-disengaging grooves symmetrically formed in a pair of opposite side walls of the sliding rail and anti-disengaging strips fixed on the inner wall of the sliding groove and matched with the anti-disengaging grooves. The anti-falling mechanism can ensure that the sliding block is always in a sliding connection state with the sliding rail, and the sliding block can be prevented from being separated from the sliding rail.

One disc of the conventional extruding and expanding device for forming the branch disc pile needs to be extruded and expanded for at least 8 times, and the construction efficiency is extremely low. In addition, only one disc can be formed at the same position, the increment of the transverse interface area is small, the axial bearing capacity of the pile foundation cannot be well improved, and the construction quality is not easy to control. In addition, due to the structural particularity and the non-uniformity of soil quality, the rotation angle is difficult to control, a plurality of branches are easily formed instead of forming a disc, and the support disc formed by extrusion of the existing support disc pile extrusion expanding device is irregular in shape. The device is provided with the expanding cutter head, the expanding supporting disc can be expanded in a rotary cutting mode, the cutter head is cut from the outside to the inside, the diameter of the supporting disc is accurately controlled, expanding construction efficiency is improved, and the application range of the supporting disc pile is expanded.

When a hard interlayer or a harder rock stratum is encountered in the conventional squeezing and expanding process, the squeezing and expanding are difficult, hole collapse is easy to occur, and the construction quality of the pile foundation is influenced and is difficult to control. In addition, the conventional squeezing and expanding process is easy to generate a serious soil squeezing effect, so that the pile forming quality is not ideal, and the problem of insufficient bearing capacity is caused. For example, small shoulders may form during the collapsibility and tend to collapse the hole. The device is provided with the expanding cutter head, the expanding support disc can be expanded in a rotary cutting mode, the cutter head is of a sharp structure, and the rotary cutting of a hard soil layer can be realized by matching with hydraulic power, so that the application range is expanded.

The utility model has the advantages that:

the utility model provides a drilling hole expanding device mainly is that the gesture of outside extension forms a dish when pore-forming construction pile foundation especially a dish pile, can form the pile foundation hole enlargement through control hole enlargement blade disc, reduces crowded native effect's influence, can protect crowded native destruction to newly forming cement pile body, is showing the bearing capacity that has improved soft ground, and the quick construction of being convenient for improves the efficiency of construction.

Drawings

Fig. 1 is a schematic structural view of a drilling hole expanding device provided by the present invention;

FIG. 2 is a schematic structural view of a longitudinal sliding mechanism;

FIG. 3 is a side view of the stop lever of FIG. 1;

FIG. 4 is a schematic view of a horizontal bar;

FIG. 5 is a side view of the clamping portion of FIG. 1 in a clamping position in the retainer portion;

FIG. 6 is a schematic view of the clamping portion of FIG. 5 rotated 90 degrees in the limiting portion;

reference numerals: 1-power rotating shaft, 2-inverted cone-shaped cutter head limiter, 3-longitudinal rod, 4-cutter head bin, 5-expanding cutter head, 51-cutter tip part, 52-connecting part, 6-annular connecting spring, 7-longitudinal sliding mechanism, 71-sliding block, 72-sliding rail, 73-sliding groove, 74-anti-falling groove, 75-anti-falling strip, 81-limiting rod, 82-sliding groove, 821-limiting part, 822-connecting channel, 83-horizontal rod, 84-locking nut, 85-clamping part and 9-connecting sleeve.

Detailed Description

The present invention will be further described with reference to the following examples and drawings so that those skilled in the art can better understand the present invention and can carry out the present invention, but the examples are not intended to limit the present invention.

In the present invention, "mounting", "fixed connection", "fixing", and the like mean that two parts connected to each other are fixed to each other, and are generally fixed to each other by welding or screws. "rotationally coupled," "slidably coupled," "slip fit," and the like refer to two components being coupled together and capable of relative movement. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It is to be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," and the like are used in the appended drawings to indicate orientations and positional relationships, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting.

Referring to fig. 1, a borehole expanding device comprises a power rotating shaft 1 and a cutter expanding mechanism, and during construction, the power rotating shaft 1 can rotate under the driving of an external hydraulic power device, so that the cutter expanding mechanism is driven to rotate to complete expanding construction. The bottom of the power rotating shaft is fixed with an inverted cone cutter head limiter 2, and the central axes of the power rotating shaft 1 and the inverted cone cutter head limiter 2 are positioned on the same straight line; the cutter head expanding mechanism comprises a pair of longitudinal rods 3 symmetrically arranged at two sides of the power rotating shaft 1, a cutter head bin 4 is horizontally fixed at the bottom of each longitudinal rod 3, an expanding cutter head 4 is placed in each cutter head bin 4, and the expanding cutter head 4 penetrates through the cutter head bin 4 and is in sliding fit with the cutter head bin 4; the expanding cutter head 5 comprises a cutter point part 51 and a connecting part 52, and the cutter point part 51 of the expanding cutter head faces outwards; the inverted cone-shaped cutter head limiter 2 is sleeved with an annular connecting spring 6, the connecting parts 52 of the expanding cutter heads are connected with the annular connecting spring 6, and under the action of the annular connecting spring 6, the connecting parts of the pair of expanding cutter heads are always abutted against the side wall of the inverted cone-shaped cutter head limiter; a position adjusting mechanism is arranged between the longitudinal rod 3 and the power rotating shaft 1, and the longitudinal rod 3 can adjust the relative height between the longitudinal rod and the inverted cone-shaped cutter head limiter 2 through the position adjusting mechanism, so that the position of the cutter head bin 4 relative to the inverted cone-shaped cutter head limiter 2 is synchronously adjusted. Under the action of the annular connecting spring 6, the diameter-expanding cutterheads 5 are in a state of being close to or far away from each other, so that the cutting diameter of the diameter-expanding cutterheads is changed.

Referring to fig. 2 to 6, the position adjusting mechanism includes a longitudinal sliding mechanism 2 disposed at a lower portion of the power rotating shaft 1 and a height adjusting mechanism disposed at a top portion of the power rotating shaft; wherein:

the structural schematic diagram of the longitudinal sliding mechanism 7 refers to fig. 2, which includes a sliding block 71 fixed inside the longitudinal rod and a sliding rail 72 fixedly connected with the power rotating shaft 1; the periphery of the power rotating shaft is fixedly connected with a connecting sleeve, and the sliding rail is fixedly connected with the power rotating shaft through the connecting sleeve. The sliding block 71 is provided with a sliding groove 73 with a square section, and the sliding block 71 is in sliding fit with the sliding rail 72 through the sliding groove 73; in order to prevent the sliding block 71 from separating from the sliding rail 72 in the vertical sliding process, an anti-separation mechanism for preventing the sliding block from separating from the sliding rail is further arranged between the sliding block 71 and the sliding rail 72. Preferably, the anti-slip mechanism comprises anti-slip grooves 74 symmetrically formed on a pair of opposite side walls of the slide rail and anti-slip strips 75 fixed on the inner wall of the slide groove and adapted to the anti-slip grooves. The longitudinal rod 3 can slide up and down in the vertical direction relative to the power rotating shaft 1 through a longitudinal sliding mechanism 7;

the height adjusting mechanism comprises a limiting rod 81 vertically fixed at the top of the power rotating shaft, the side view of the limiting rod 81 refers to fig. 3, a sliding groove 82 is formed in the middle of the limiting rod 81 along the axial direction of the limiting rod, and the sliding groove 82 comprises a plurality of limiting parts 821 with arc-shaped longitudinal sections and connecting channels 822 which are arranged between every two adjacent limiting parts and used for communicating the limiting parts; a horizontal rod 83 penetrates through the chute 82, the structural schematic diagram of the horizontal rod refers to fig. 4, two ends of the horizontal rod 83 are respectively connected with a pair of longitudinal rods 3 on two sides of the power rotating shaft in a rotating manner, two ends of the horizontal rod 83 are connected with lock nuts 84, the connection state between the horizontal rod and the longitudinal rods is adjusted through the lock nuts, and when the horizontal rod needs to be rotated, the nuts are screwed; when the horizontal rod and the vertical rod are required to be fixedly connected, the screw cap is screwed tightly; the middle part of the horizontal rod 83 is provided with a clamping part 85 which can rotate freely in the limiting part 821; the length of the long side of the longitudinal section of the clamping part 85 is greater than the width of the channel of the connecting channel, and the length of the short side of the longitudinal section of the clamping part is less than the width of the channel of the connecting channel; through this design, can guarantee that horizon bar 83 can make its joint portion be located not the spacing portion of co-altitude through spout 82 to reach the purpose of adjusting the vertical pole height. When the horizontal rod 83 needs to be stably clamped in a certain limit part 821 in the sliding groove 82, the lock nut 84 is screwed, the horizontal rod 83 is rotated to enable the clamping part in the horizontal rod to be placed in the state shown in fig. 5, then the lock nut 84 is screwed to prevent the horizontal rod from rotating, and at the moment, under the limit action of the limit part 821, the horizontal rod is clamped in the limit part 821. When the position of the horizontal rod 83 needs to be lifted or lowered, the lock nut 84 is firstly screwed, then the horizontal rod is rotated by 90 degrees, so that the placing state of the clamping part in the horizontal rod in the sliding groove is shown in fig. 6, at this time, the horizontal rod can be moved up or down through the connecting channel 822, then the placing state of the clamping part 85 in the horizontal rod is adjusted to the state shown in fig. 5, and then the lock nut 84 is screwed.

The utility model discloses a gag lever post 81 can control horizon bar 83 in the high position of difference to drive cutter head storehouse 4 for the position of back taper cutter head stopper 2 through vertical pole 3. Under the action of the annular connecting spring 6, the expanding cutterheads 5 are in a state of being close to or far away from each other, so that the cutting diameter of the expanding cutterheads 5 is changed. When construction is needed, the height of the horizontal rod 83 is lifted, under the expanding action of the inverted cone-shaped cutter head limiting device 2, the expanding cutter head 5 slides outwards along the cutter head bin 4, the cutter head part extends outwards, and cutting is carried out after the target expanding is reached. When the construction is finished, the height of the horizontal rod 83 is adjusted downwards, and the diameter expanding cutterheads 5 can be retracted inwards through the elasticity of the annular connecting spring 6.

It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims (5)

1. A borehole expanding device is characterized in that: the cutter head expanding mechanism comprises a power rotating shaft and a cutter head expanding mechanism, wherein an inverted cone-shaped cutter head limiter is fixed at the bottom of the power rotating shaft, and the central axes of the power rotating shaft and the inverted cone-shaped cutter head limiter are positioned on the same straight line; the cutter head expanding mechanism comprises a pair of longitudinal rods symmetrically arranged on two sides of the power rotating shaft, a cutter head bin is horizontally fixed at the bottom of each longitudinal rod, an expanding cutter head is placed in the cutter head bin, and the expanding cutter head penetrates through the cutter head bin and is in sliding fit with the cutter head bin; the diameter expanding cutter head comprises a cutter point part and a connecting part, and the cutter point part of the diameter expanding cutter head faces outwards; the inverted cone-shaped cutter head limiter is sleeved with an annular connecting spring, the connecting parts of the expanding cutter heads are connected with the annular connecting spring, and the connecting parts of the pair of expanding cutter heads are always abutted against the side wall of the inverted cone-shaped cutter head limiter under the action of the annular connecting spring; and a position adjusting mechanism is arranged between the longitudinal rod and the power rotating shaft, and the longitudinal rod can adjust the relative height between the longitudinal rod and the inverted cone-shaped cutter head limiting device through the position adjusting mechanism.

2. The borehole expanding device according to claim 1, wherein: the position adjusting mechanism comprises a longitudinal sliding mechanism arranged at the lower part of the power rotating shaft and a height adjusting mechanism arranged at the top of the power rotating shaft; the longitudinal rod can slide up and down in the vertical direction relative to the power rotating shaft through a longitudinal sliding mechanism; the height adjusting mechanism comprises a limiting rod vertically fixed at the top of the power rotating shaft, a sliding groove is formed in the middle of the limiting rod along the axial direction of the limiting rod, a horizontal rod penetrates through the sliding groove, two ends of the horizontal rod are respectively connected with a pair of longitudinal rods on two sides of the power rotating shaft in a rotating mode, and two ends of the horizontal rod are connected with locking nuts; the sliding groove comprises a plurality of limiting parts with arc-shaped longitudinal sections and connecting channels which are arranged at intervals in the vertical direction and are used for communicating the limiting parts, and the connecting channels are positioned between every two adjacent limiting parts; the middle part of the horizontal rod is provided with a clamping part which can rotate freely in the limiting part; the long side length of the longitudinal section of the clamping portion is larger than the channel width of the connecting channel, and the short side length of the longitudinal section of the clamping portion is smaller than the channel width of the connecting channel.

3. The borehole expanding device according to claim 2, wherein: the longitudinal sliding mechanism comprises a sliding block fixed on the inner side of the longitudinal rod and a sliding rail fixedly connected with the power rotating shaft; the sliding block is provided with a sliding groove with a square cross section, and the sliding block is in sliding fit with the sliding rail through the sliding groove; an anti-falling mechanism for preventing the sliding block from being separated from the sliding rail is further arranged between the sliding block and the sliding rail.

4. The borehole expanding apparatus according to claim 3, wherein: the anti-disengaging mechanism comprises anti-disengaging grooves symmetrically formed in a pair of opposite side walls of the sliding rail and anti-disengaging strips fixed on the inner wall of the sliding groove and matched with the anti-disengaging grooves.

5. The borehole expanding apparatus according to claim 3 or 4, wherein: the outer peripheral side of the power rotating shaft is fixedly connected with a connecting sleeve, and the sliding rail is fixedly connected with the power rotating shaft through the connecting sleeve.

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