1. The spiral extrusion drilling barrel is characterized by comprising a drilling barrel body, wherein a rotary cutting part is arranged at the bottom end of the drilling barrel body, and a spiral extrusion belt is wound on the periphery of the drilling barrel body, so that when the drilling barrel body drives the rotary cutting part to rotate and cut soil materials, the spiral extrusion belt compacts backfill materials on the periphery of the drilling barrel body.

2. The screw extrusion drill bit of claim 1, further comprising a collection barrel disposed above the drill bit body and configured to collect drill soil, the collection barrel being provided with a riser connector.

3. The screw extrusion drill barrel of claim 2, wherein the collection cylinder is cylindrical and the drill barrel body is frustoconical with a diameter that tapers from top to bottom.

4. The screw extrusion drill barrel according to any one of claims 1 to 3, wherein the rotary cutting part is a rotary cutting tooth uniformly distributed along the circumference of the drill barrel body.

5. The screw extrusion drill bit of claim 4, wherein the rotary cutting teeth extend in an axial direction of the drill bit body.

6. The screw extrusion drill barrel according to claim 2, characterized in that the diameter of the collection cylinder is larger than the maximum value of the diameter of the drill barrel body and smaller than the maximum value of the outer diameter of the screw extrusion belt 3.

7. The screw extrusion drill barrel of claim 2 or 3, wherein the screw extrusion belt is arcuately bent in a direction from the drill barrel body to the collection barrel.

8. The screw extrusion drill barrel of claim 5, wherein the top width of the rotary cutting teeth is less than the root width thereof.

9. The screw extrusion drill barrel of claim 5, wherein the rotary cutting teeth are arranged to be inclined from a tooth root direction thereof toward a tooth tip direction thereof.

10. The screw extrusion drill barrel of claim 7, wherein the bottom of the drill barrel body is further provided with an openable and closable closing unit.

Background

In the traditional pile foundation construction process, adverse geological conditions such as a soft soil layer, a loose soil layer backfill area and the like are often met, and in order to ensure the construction quality of a pile foundation, a backfill cementing material (such as concrete and the like) is generally adopted, and after the solidification of the backfill cementing material reaches a certain strength, a drill cylinder is used for drilling construction. In the conventional process, the backfilling is carried out after the drilled hole is cleaned, and the risk of hole collapse exists in the period of cleaning the drilled hole and backfilling. In addition, the backfill needs to be drilled again after solidification, which not only causes great waste of the cementing material, but also prolongs the construction period.

Disclosure of Invention

The invention aims to provide a spiral extrusion drill cylinder which can improve the drilling and backfilling construction efficiency and reduce the construction cost.

In order to achieve the purpose, the invention provides a spiral extrusion drill barrel which comprises a drill barrel body, wherein the bottom end of the drill barrel body is provided with a rotary cutting part, and a spiral extrusion belt is wound on the periphery of the drill barrel body, so that when the drill barrel body drives the rotary cutting part to rotate and cut soil materials, the spiral extrusion belt compacts backfill materials on the periphery of the drill barrel body.

Optionally, the drilling device further comprises a collecting cylinder body arranged above the drilling cylinder body and used for collecting drilling soil, and the collecting cylinder body is provided with a vertical rod connector.

Optionally, the collecting cylinder is cylindrical, and the drilling cylinder body is in a circular truncated cone shape with a diameter gradually reduced from top to bottom.

Optionally, the rotary cutting part is rotary cutting teeth uniformly distributed along the circumferential direction of the drill barrel body.

Optionally, the rotary cutting teeth extend in an axial direction of the drill barrel body.

Optionally, the diameter of the collection cylinder is greater than the maximum value of the diameter of the drill cylinder body and less than the maximum value of the outer diameter of the spiral extrusion belt.

Optionally, the spiral extrusion belt is bent in an arc shape along the direction from the drill cylinder body to the collection cylinder body.

Optionally, the top width of the rotary cutting tooth is less than the root width thereof.

Alternatively, the rotary cutting teeth are arranged obliquely from a tooth root direction thereof toward a tooth tip direction thereof.

Optionally, the bottom of the drill barrel body is further provided with a closing unit which can be opened and closed.

Compared with the background technology, the spiral extrusion drill barrel provided by the invention comprises a rotary barrel body, a rotary cutting part arranged at the bottom end of the drill barrel body and a spiral extrusion belt arranged on the periphery of the drill barrel body; when the spiral extrusion belt is in left-hand rotation, the rotary cutting part rotates to cut soil materials by driving the drill cylinder body to rotate anticlockwise, and the soil materials enter the drill cylinder body to realize drilling and soil taking; meanwhile, backfill materials are conveyed to the periphery of the drill cylinder body, and the backfill materials are compacted while being conveyed to the lower portion of the drill hole by the spiral extrusion belt. And taking out the drilling barrel body after the soil material in the drilling barrel body is fully piled, and pouring the soil material to an appointed position. The synchronous drilling and soil taking and material backfilling are realized, the material backfilling is not needed after the drilling, the secondary drilling is carried out on the backfilled material, the backfilled material is saved, the construction cost is reduced, and the construction efficiency is obviously improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic view of a screw extrusion drill bit provided in accordance with an embodiment of the present invention;

FIG. 2 is a schematic diagram of the operation of the screw extrusion drill barrel;

fig. 3 is a bottom view of a screw extrusion drill bit according to another embodiment of the present invention.

Wherein:

1-collecting cylinder body, 2-drilling cylinder body, 3-spiral extrusion belt, 4-rotary cutting part, 5-vertical rod connector, 6-first sealing baffle, 7-second sealing baffle, 8-rotating shaft and 9-stopping part.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 3, fig. 1 is a schematic view of a screw extrusion drill cylinder according to an embodiment of the present invention, fig. 2 is a schematic view of a working principle of the screw extrusion drill cylinder, and fig. 3 is a bottom view of the screw extrusion drill cylinder according to another embodiment of the present invention.

The spiral extrusion drill cylinder comprises a rotary cylinder body, a rotary cutting part 4 and a spiral extrusion belt 3, wherein the rotary cutting part 4 is arranged at the bottom end of the drill cylinder body 2 and is used for cutting soil materials to form a drilled hole, the soil materials enter the drill cylinder body 2 through the bottom of the drill cylinder body 2, the spiral extrusion belt 3 is used for drilling downwards in the drill cylinder body 2 and rotating along with the drill cylinder body 2, and backfill materials are conveyed downwards.

For example, when the spiral extrusion belt 3 is left-handed, the rotary cutting part 4 rotates to cut earth materials by driving the drill cylinder body 2 to rotate counterclockwise, and the earth materials enter the drill cylinder body 2 to drill holes and take earth; meanwhile, the backfill material is conveyed to the periphery of the drill barrel body 2, and the backfill material is compacted while being conveyed to the lower part of the drill hole by the spiral extrusion belt 3. And taking out the drilling barrel body 2 after the soil material inside the drilling barrel body 2 is fully piled, and pouring the soil material to an appointed position. When the spiral extrusion belt 3 is right-handed, the drill barrel body 2 needs to be driven to rotate clockwise.

The screw extrusion drill cylinder realizes the synchronous operation of drilling soil taking and material backfilling, does not need to carry out material backfilling after drilling and carry out secondary drilling on backfilled materials, saves backfilled materials, reduces construction cost and obviously improves construction efficiency.

The present invention provides a screw extrusion drill bit, which is described in more detail below with reference to the accompanying drawings and embodiments.

The drill barrel body 2 of the spiral extrusion drill barrel is in a hollow round table shape, the diameter of the drill barrel body 2 is gradually increased from the bottom to the top, the rotary cutting part 4 is specifically a plurality of rotary cutting teeth arranged at the bottom end of the drill barrel body 2, and the spiral extrusion belt 3 is wound on the periphery of the drill barrel body 2. When the direction of the spiral extrusion belt 3 is left-handed (overlook), the rotation direction of the drill cylinder body 2 is anticlockwise when drilling and taking soil, as shown in figure 2; when the direction of the spiral extrusion belt 3 is dextrorotation, the rotation direction of the drill cylinder body 2 is clockwise when the soil is drilled and taken. The spiral extrusion belt 3 can convey the backfill material downwards when rotating along with the drill cylinder body 2, and can extrude the backfill material to enable the backfill material to be embedded into soil around a drill hole to form a protective wall. For the dado shaping with higher speed, this application optimizes the shape of spiral extrusion area 3 for spiral extrusion area 3 upwards is the arc and turns over. In this way, the normal direction of the belt tip of the spiral extrusion belt 3 is inclined downwards, and under the centrifugal force and the extrusion force of the rotary drive, the backfill material is accelerated to be conveyed downwards and simultaneously a wall protection layer is formed on the inner wall of the drilled hole.

In the above embodiment, the rotary cutting portion 4 specifically adopts multiple sets of rotary cutting teeth, the multiple sets of rotary cutting teeth are disposed at the bottom of the drill cylinder body 2 and are uniformly disposed along the circumferential direction of the bottom end of the drill cylinder body 2, and any one of the rotary cutting teeth extends along the axial direction of the drill cylinder body 2. When the drilling barrel body 2 rotates, all the rotary cutting teeth rotate and cut on the same circumference, soil is broken to form a drilled hole, the soil enters the drilling barrel body 2 from the bottom of the drilling barrel body 2, the drilling barrel body 2 is integrally taken out after the soil inside the drilling barrel body 2 is fully stored, and the drilled hole is continuously drilled after the soil is unloaded to a specified place.

In order to improve the drilling and soil crushing efficiency of the rotary cutting teeth, the rotary cutting teeth adopt sharp teeth with wide tooth roots and narrow tooth tops, and the rotary cutting teeth preferably adopt isosceles trapezoid teeth in consideration of abrasion of the rotary cutting teeth. In addition, in consideration of the consistency of the rotation direction of the drill barrel body 2, the rotary cutting direction of the rotary cutting teeth, and the extrusion direction of the screw extrusion belt 3, one side of the rotary cutting teeth is arranged obliquely from the tooth root to the tooth tip. That is to say when the spiral extrusion area 3 is the left side of overlooking the direction, the lower direction slope setting left from the dedendum to the addendum of the right flank of arbitrary rotary cutting tooth, and the rotary cutting tooth is preferred right trapezoid this moment, under the unanimous prerequisite of dedendum width, has increased the width of addendum and rotary cutting tooth's bulk strength and wear resistance.

Preferably, the screw extrusion drill cylinder further comprises a collecting cylinder body 1, and the collecting cylinder body 1 is arranged above the drill cylinder body 2 and is integrally formed with the drill cylinder body 2. The collecting cylinder 1 is preferably cylindrical, and the inner capacity of the screw extrusion drill cylinder is increased by means of the arrangement of the collecting cylinder 1, so that the drilling depth of the screw extrusion drill cylinder is increased when one soil taking is completed. The spiral extrusion belt 3 is usually only arranged on the periphery of the drill barrel body 2, and the diameter of the collecting barrel body 1 is usually larger than or equal to the maximum value of the diameter of the drill barrel body 2 and smaller than the maximum value of the diameter of the spiral extrusion belt 3. Of course, the spiral squeezing belt 3 can also be arranged at the periphery of the collecting cylinder 1 according to the requirement, and the description of the application is omitted. The top of the collecting cylinder 1 is provided with a vertical rod connector 5 so as to quickly connect the vertical rod of the drilling machine and conveniently replace the drilling cylinder.

In a further embodiment provided by the present invention, the bottom of the barrel body 2 of the screw extrusion barrel is further provided with a closing unit that can be opened and closed. In the process of drilling and taking soil, the sealing unit is opened, and soil materials which are rotary-cut by the rotary-cutting part 4 enter the drill cylinder body 2; when the drilling barrel body 2 and the collecting barrel body 1 are fully filled with soil, the spiral extrusion drilling barrel stops rotating, the bottom of the drilling barrel body 2 is sealed by the sealing unit, and rotary-cut soil is extracted from a drilled hole. Obviously, when the drill body 2 is a circular truncated cone-shaped cylinder with a large top and a small bottom, the soil can be extracted from the drilled hole even if the closing unit is not provided.

The arrangement of the sealing unit can refer to fig. 1, and the sealing unit comprises first sealing baffles 6, the first sealing baffles 6 are preferably arranged into two groups, the two groups of first sealing baffles 6 are connected to the bottom of the drill barrel body 2 in a central symmetry manner, a rotating shaft 8 is arranged in the middle of the two groups of first sealing baffles 6, and a second sealing baffle 7 is rotatably connected to the rotating shaft 8. The second sealing baffle 7 is arranged above the first sealing baffle 6, the bottom of the drill cylinder body 2 can be sealed by matching the first sealing baffle and the second sealing baffle, a stopping part 9 which extends vertically downwards is arranged on the lower end face of the second sealing baffle 7, and the stopping part 9 is a stopping column fixedly connected with the second sealing baffle 7.

When the drill cylinder rotates at a high speed, the second sealing baffle 7 rotates to the position above the first sealing baffle 6 under the action of inertia, the bottom of the drill cylinder body 2 is opened, the stopping part 9 is attached to the edge of the first side of the first sealing baffle 6, the rotary cutting part 4 carries out rotary cutting on the soil material, and the crushed soil material enters the drill cylinder body 2 from a gap between the first sealing baffles 6; when the drill barrel body 2 stops rotating, the second sealing baffle 7 rotates to the notch of the first sealing baffle 6 from the upper part of the first sealing baffle 6 under the action of inertia, and the stopping part 9 is attached to the edge of the second side of the first sealing baffle 6, so that the bottom of the drill barrel body 2 is sealed, and soil is conveyed out from a drilled hole.

Obviously, the opening and closing of the closing unit is not limited to the inertia driving, and a driving unit (such as a motor driving a baffle to rotate or a push rod driving a flap to turn) can be arranged to actively control the opening and closing of the bottom of the drill cylinder body 2 according to requirements, and the application is not described in detail again.

The spiral extrusion drill cylinder provided by the invention cuts soil materials through the rotary cutting part 4 at the bottom of the drill cylinder body 2, so that a soil layer at the bottom is crushed and loosened to enter the drill cylinder body 2, and along with the continuous penetration of the drill cylinder body 2, more and more soil materials in the drill cylinder body 2 enter the collecting cylinder body 1 for storage; while the drill cylinder body 2 rotates, the spiral extrusion belt 3 applies extrusion force deviating from the hollow part of the drill hole downwards to the backfill materials around, so that the backfill materials are conveyed downwards and embedded into the soil layer around the drill cylinder body 2 to form a circumferential retaining wall, the synchronous drilling and soil taking and material backfilling are realized, the construction efficiency is improved, and the construction cost is reduced.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The screw extrusion drill barrel provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.