CN217783414U

CN217783414U - Cement mixing stake drill bit device and cement mixing stake

Info

Publication number: CN217783414U
Application number: CN202221011575.XU
Authority: CN
Inventors: 李涛; 张时涵; 梁旭清; 刁里鹏; 郑宇灏; 邓益才
Original assignee: No 7 Engineering Co ltd Of Cccc Fourth Navigation Bureau; CCCC Fourth Harbor Engineering Co Ltd
Current assignee: No 7 Engineering Co ltd Of Cccc Fourth Navigation Bureau; CCCC Fourth Harbor Engineering Co Ltd
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2022-11-11
Anticipated expiration: 2032-04-24

Abstract

The utility model relates to the technical field of foundation engineering, in particular to a cement mixing pile drill bit device, which comprises a drill rod, a plurality of groups of mixing blades and a drill bit; the drill rod is arranged in a hollow mode, and a slurry outlet communicated with the inner cavity of the drill rod is formed in the side wall of the drill rod; one end of each of the stirring blades is connected with the drill rod, and the other end of each of the stirring blades extends outwards along the radial direction; the outer end of the stirring blade is provided with a tunneling blade which is obliquely arranged; the drill bit is arranged at the lower end of the drill rod. The utility model discloses a setting of drill bit and stirring vane for the drill bit device has stronger cutting penetrability, thereby realizes carrying out effectual cutting, breakage and piercing through to hard intermediate layer such as sand, is favorable to improving and becomes stake efficiency and quality.

Description

Cement mixing stake drill bit device and cement mixing stake

Technical Field

The utility model relates to a foundation engineering technical field, concretely relates to cement mixing pile drill bit device and cement mixing pile.

Background

In the reinforcing construction of soft soil foundation, the cement-soil mixing pile is a main construction method, which uses cement as curing agent, and forcibly mixes the soft soil and cement in the foundation soil through the cement-soil mixing pile machine to make the cement and the soft soil react and solidify, thus forming the cement-soil pile with integrity, water stability and certain strength. However, due to the complex geological conditions of part of construction areas, the working strata of the cement-soil mixing pile can encounter hard interlayers such as medium coarse sand, fine sand and the like besides soft soil layers such as mucky soil, fine clay and the like, and the stirring cutting force of a common cement-soil mixing pile drill bit on the hard interlayers is insufficient, so that the hard interlayers cannot be normally and effectively penetrated, the pile forming time is longer, the using amount of cement paste is larger, the pile length cannot reach the design standard and the like, and the construction efficiency, the cost and the quality of a pile foundation are finally influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above shortcoming of prior art, the utility model aims at providing a cement mixing pile drill bit device, the device have stronger stirring cutting force, can carry out effectual cutting and pierce through to hard intermediate layers such as sand, are favorable to improving and become stake efficiency and quality.

Another object of the utility model is to provide a cement mixing stake that contains above-mentioned cement mixing stake drill bit device.

The utility model provides a technical scheme that its technical problem adopted is:

a drill bit device for a cement mixing pile comprises a drill rod, a plurality of groups of mixing blades and a drill bit; the drill rod is arranged in a hollow mode, and a slurry outlet communicated with the inner cavity of the drill rod is formed in the side wall of the drill rod; one end of each of the stirring blades is connected with the drill rod, and the other end of each of the stirring blades extends outwards along the radial direction; the outer end of the stirring blade is provided with a tunneling blade which is obliquely arranged; the drill bit is arranged at the lower end of the drill rod.

The working principle of the drill bit device for the cement mixing pile is as follows:

the during operation drives through the agitating unit of cement stirring stake the drilling rod is rotatory to drive gradually through elevating gear the utility model discloses a drill bit device feeds downwards, thereby realizes piercing through soil layer and hard interbedded cutting. In the construction process, cement grout is conveyed to a construction position through a grout outlet; the drill bit penetrates and crushes the hard sand layer so that the drill bit device can smoothly feed downwards; meanwhile, the stirring blades stir the crushed soil, the hard interlayer sandy soil and the cement slurry in the rotating process so as to enable the soil and the cement slurry to be more uniform; furthermore, a plurality of groups the tunneling blade on the outer end of the stirring blade generates a secondary cutting and crushing effect on the sand of the hard interlayer, and plays a role in uniformly stirring the soil and the cement slurry, thereby being beneficial to improving the uniformity of the soil and the cement slurry.

Preferably, the stirring blade is provided with an upper tunneling tooth, and the upper tunneling tooth is arranged at the top of the stirring blade.

Preferably, the stirring blade is provided with a lower tunneling tooth, and the lower tunneling tooth is arranged at the bottom of the stirring blade.

Preferably, the upper ripping tooth and the lower ripping tooth are arranged in a staggered manner.

Preferably, the stirring blades are provided with a plurality of groups, and the plurality of groups of stirring blades are arranged in a staggered manner.

Preferably, the stirring blades are arranged in two groups, and the two groups of stirring blades are staggered by 90 degrees.

Preferably, the two stirring blades of the same group are arranged on the same diameter extension line of the drill rod.

Preferably, the slurry outlet is arranged between the two groups of stirring blades.

Preferably, the top of the drill rod is provided with a flange interface.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a setting of drill bit and stirring vane for the drill bit device has stronger cutting penetrability, thereby realizes carrying out effectual cutting, breakage and piercing through to hard intermediate layers such as sand, is favorable to improving and becomes stake efficiency and quality.

2. The cement mixing pile drill bit device has simple structure, saves time and labor when dealing with the hard sand interlayer, ensures that the sand layer is easier to cut and easy to penetrate, has even mixing and safe and reliable operation; compared with the common drill bit device, the pile forming efficiency is effectively improved, the cement paste waste is reduced, and the pile forming quality is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a perspective view of one embodiment of the drill bit device for cement mixing piles of the present invention.

Wherein:

1-a drill rod, 2-a stirring blade, 3-a tunneling blade, 4-an upper tunneling tooth, 5-a flange interface, 6-a lower tunneling tooth, 7-a drill bit and 8-a grout outlet.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in detail with reference to the accompanying drawings and the detailed description. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, and the described embodiments are merely some embodiments, rather than all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Example 1

As shown in fig. 1, the cement mixing pile drill bit device of the embodiment includes a drill rod 1, a plurality of sets of mixing blades 2, and a drill bit 7; the drill rod 1 is arranged in a hollow manner, and a slurry outlet 8 communicated with the inner cavity of the drill rod 1 is formed in the side wall of the drill rod 1; one end of each of the stirring blades 2 is connected with the drill rod 1, and the other end of each of the stirring blades extends outwards along the radial direction; the outer end of the stirring blade 2 is provided with a tunneling blade 3, and the tunneling blade 3 is obliquely arranged; the drill bit 7 is arranged at the lower end of the drill rod 1. In this embodiment, the tunneling blade 3 is inclined outward, the upper end of the tunneling blade 3 is relatively arranged close to the inside, and the lower end of the tunneling blade 3 is relatively arranged close to the outside.

As shown in fig. 1, the stirring blade 2 is provided with an upper ripping tooth 4, and the upper ripping tooth 4 is arranged on the top of the stirring blade 2. And the stirring blade 2 is also provided with a lower tunneling tooth 6, and the lower tunneling tooth 6 is arranged at the bottom of the stirring blade 2. Through the setting of last driving tooth 4 and lower driving tooth 6, be favorable to promoting the drill bit device and drilling down and promote the rotatory cutting penetrability of process to be favorable to carrying out effectual breakthrough breakage to the soil layer, and make the stirring of earth and cement thick liquid more even.

As shown in figure 1, in this embodiment the upper ripping tooth 4 and the lower ripping tooth 6 are staggered. Specifically, with the drill rod 1 as a center, the installation radius of the upper tunneling tooth 4 and the lower tunneling tooth 6 on the same stirring blade 2 is different, in this embodiment, the installation radius of the upper tunneling tooth 4 is larger than that of the lower tunneling tooth 6, and one upper tunneling tooth 4 and one lower tunneling tooth 6 are both provided; of course, a greater number of upper and lower ripping

teeth

4 and 6 may be provided to improve the down-drilling and lifting capabilities of the drill head apparatus of the present embodiment.

As shown in fig. 1, in the present embodiment, two sets of the stirring blades 2 are provided, and the two sets of the stirring blades 2 are staggered by 90 degrees. Further, two stirring blades 2 of the same group are arranged on the same diameter extension line of the drill rod 1. Particularly, by arranging the stirring blade 2, the stirring uniformity is favorably improved, the crushing capacity of a hard interlayer is favorably improved, and the pile forming quality is improved. Of course, the number of the stirring blades 2 in the embodiment may be increased according to different situations; alternatively, two stirring blades 2 of the same group may be disposed at different angles.

As shown in fig. 1, the slurry outlet 8 is disposed between two sets of the stirring blades 2. With the setting of grout outlet 8 between two sets of stirring vane 2 for can mix more easily with the earth after the breakage after the cement thick liquid blowout, thereby make cement thick liquid and earth even mixing more easily.

As shown in fig. 1, the top of the drill rod 1 is provided with a flange joint 5. Through the setting of flange interface 5 to be connected with agitating unit or the hoisting device of cement mixing pile, simple structure, convenient to use.

As shown in fig. 1, the working principle of the cement mixing pile drill bit device of the embodiment is as follows:

the during operation drives through the agitating unit of cement stirring stake drilling rod 1 is rotatory to drive gradually through elevating gear the utility model discloses a drill bit device feeds downwards, thereby realizes piercing through soil layer and hard interbedded cutting. In the construction process, cement grout is conveyed to a construction position through an inner cavity of the drill rod 1 and the grout outlet 8; the drill bit 7 penetrates and crushes the hard sand layer so that the drill bit device smoothly feeds downwards; meanwhile, the two groups of stirring blades 2 stir and disturb the crushed soil, the hard interlayer sandy soil and the cement slurry in the rotating process so as to enable the soil and the cement slurry to be more uniform; furthermore, the tunneling blades 3 at the outer ends of the stirring blades 2 cut and crush soil bodies on two sides, secondary cutting and crushing effects are generated on sand of the hard interlayer, and the effect of uniformly stirring the soil and cement slurry is achieved, so that the improvement of the uniformity of the soil and cement slurry is facilitated. When promoting the action, last tunnelling tooth 4 on the stirring vane 2 cuts the breakage to the soil layer and pierces through for earth crushing effect is better, and stirs earth and cement thick liquid once more, makes earth and cement thick liquid more even.

This embodiment still discloses a cement mixing stake, include cement mixing stake drill bit means, be used for the drive the rotatory agitating unit of cement mixing stake drill bit means and drive the elevating gear that cement mixing stake drill bit means goes up and down.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made by the technical essence of the present invention to the above embodiments do not depart from the technical solution of the present invention, and still fall within the scope of the technical solution of the present invention.

Claims

1. A drill bit device for a cement mixing pile is characterized by comprising a drill rod, a plurality of groups of mixing blades and a drill bit; the drill rod is arranged in a hollow mode, and a slurry outlet communicated with the inner cavity of the drill rod is formed in the side wall of the drill rod; one end of each of the stirring blades is connected with the drill rod, and the other end of each of the stirring blades extends outwards along the radial direction; the outer end of the stirring blade is provided with a tunneling blade which is obliquely arranged; the drill bit is arranged at the lower end of the drill rod.

2. The cement mixing pile drill bit device as claimed in claim 1, wherein the mixing blade is provided with an upper ripping tooth, and the upper ripping tooth is arranged on the top of the mixing blade.

3. The cement mixing pile drill bit device as recited in claim 2, wherein the mixing blade is provided with a lower ripping tooth, and the lower ripping tooth is provided at a bottom of the mixing blade.

4. The cement mixing pile drill bit assembly as recited in claim 3, wherein the upper ripping tooth and the lower ripping tooth are staggered.

5. The cement mixing pile drill bit device as recited in claim 1, wherein said mixing blades are provided in a plurality of sets, and said sets of mixing blades are staggered with respect to each other.

6. The cement mixing pile drill bit device as recited in claim 5, wherein there are two sets of mixing blades, and the two sets of mixing blades are staggered by 90 degrees.

7. Cement mixing pile bit assembly according to any of claims 1-6, characterized in that two mixing blades of the same set are arranged on the same diameter extension of the drill rod.

8. Cement mixing pile bit arrangement according to claim 6, characterised in that the grout outlet is arranged between two sets of mixing blades.

9. The cement mixing pile drill bit assembly as recited in claim 1, wherein a flanged joint is provided at a top portion of the drill stem.

10. A cement mixing pile, characterized by comprising the cement mixing pile drill bit device of any one of claims 1-9, a mixing device for driving the cement mixing pile drill bit device to rotate, and a lifting device for driving the cement mixing pile drill bit device to lift.