CN212867419U

CN212867419U - Rotary drilling bit

Info

Publication number: CN212867419U
Application number: CN202021343488.5U
Authority: CN
Inventors: 徐冠玉; 刘自兵; 杨雁彬; 陈钰博; 衣艳敏
Original assignee: China Railway Construction Engineering Group Co Ltd; China Railway Construction Engineering Group Guangdong Co Ltd
Current assignee: China Railway Construction Engineering Group Co Ltd; China Railway Construction Engineering Group Guangdong Co Ltd
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2021-04-02
Anticipated expiration: 2030-07-09

Abstract

A rotary drill bit, comprising: outer barrel, interior barrel and a plurality of tooth, interior barrel is used for being the inner tube terminal surface with the terminal surface of ground contact, and outer barrel is used for being the urceolus terminal surface with the terminal surface of ground contact, and inner tube terminal surface and urceolus terminal surface all are equipped with tooth, and outer barrel cover is established on interior barrel, and interior barrel sets up with the axle center with outer barrel, and it is external that the urceolus is stretched out to the one end that is close to ground of interior barrel, and a plurality of tooth are including being used for being two kinds of at least tooth of different shapes with the terminal surface of ground contact, and at least one of them tooth of installing two kinds at. According to the rotary drilling bit of the embodiment, due to the fact that the teeth with different end face shapes are combined, the rotary drilling bit can adapt to mudstone strata and various different geological mixed complex strata by adjusting the types of the teeth installed on the rotary drilling bit, construction efficiency can be improved, loss of the rotary drilling bit can be reduced, construction cost is reduced, and economic benefits are improved.

Description

Rotary drilling bit

Technical Field

The utility model belongs to the building engineering field, more specifically say, relate to a dig drill bit soon.

Background

With the rapid development of economy in China and the rapid rise of the building industry, the construction of the pile foundation becomes more and more important, and rotary drilling is concerned more and more in the construction of the pile foundation. The principle of the rotary drilling construction pile foundation technology is to utilize the continuous rotation and sinking of a drill rod and a drill bit to take earth. Because dig soon and bore hole-forming pile bearing capacity is strong in the work progress, and it is of high quality to become a stake, and the work efficiency is swift, characteristics such as environmental protection performance is superior are prepared with construction enterprise's favor to it is more and more common to dig soon to bore construction pile foundation. However, when the rotary drilling construction pile foundation meets a special stratum, the problems of construction efficiency and construction quality are also a great difficulty.

When the mudstone stratum is constructed, the conventional cutting bit is slow in footage, the work efficiency is extremely low, and if the roller bit is adopted for construction, mudstone particles easily enter a roller of the roller, the internal structure of the roller is damaged, the efficiency is not improved, and the construction cost is greatly improved (the roller is the tooth with the highest cost in the teeth for the drill bit at the current stage).

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a dig drill bit soon to solve the technical problem who improves the efficiency of punching and the construction cost in complicated stratum.

In order to achieve the above object, the utility model adopts the following technical scheme: provided is a rotary drill bit, comprising: outer barrel, interior barrel and a plurality of tooth, interior barrel is used for being the inner tube terminal surface with the terminal surface of ground contact, outer barrel is used for being the urceolus terminal surface with the terminal surface of ground contact, the inner tube terminal surface with the urceolus terminal surface all is equipped with tooth, outer barrel cover is established on the interior barrel, interior barrel with the coaxial center setting of outer barrel, the one end that is close to ground of interior barrel stretches out the urceolus is external, a plurality of tooth are including being used for two kinds at least tooth that are different shapes with the terminal surface of ground contact, outer barrel with at least one of them installs two kinds at least differences of interior barrel tooth.

Furthermore, the tooth with outer barrel and interior barrel are all detachable to be connected.

Further, a plurality of teeth are arranged on the circumference of the end face, used for contacting with the ground, of the outer cylinder body and the inner cylinder body in an equidistant and symmetrical mode.

Furthermore, the teeth comprise conical teeth with conical end surfaces, flat teeth with plane end surfaces and/or spherical teeth with spherical end surfaces.

Furthermore, one or more teeth are installed on the outer cylinder body, and one or more teeth are installed on the inner cylinder body.

Furthermore, one kind of teeth are installed on the outer cylinder body, and at least two kinds of teeth are installed on the inner cylinder body; or at least two kinds of teeth are arranged on the outer cylinder body, and one kind of teeth is arranged on the inner cylinder body; or the outer cylinder body and the inner cylinder body are both provided with at least two kinds of teeth.

Furthermore, the outer cylinder body is provided with the flat teeth or the bevel teeth or the spherical teeth, and the inner cylinder body is provided with the flat teeth and the bevel teeth.

Furthermore, wear-resistant strips are formed on the outer surfaces of the outer cylinder body and the inner cylinder body, and the wear-resistant strips are arranged spirally.

According to the rotary drilling bit of the embodiment, due to the fact that the teeth with different end face shapes are combined, the machining efficiency of each tooth to different geological strata is different, the rotary drilling bit can adapt to different geological strata, rock strata, mud strata, mudstone strata and various different geological mixed complex strata by adjusting the type of the tooth mounted on the rotary drilling bit, the construction efficiency can be improved, the loss of the drill bit can be reduced, the construction cost is reduced, and the economic benefit is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic view of a rotary drilling bit provided in an embodiment of the present invention;

fig. 2 is a schematic view of the rotary drilling bit provided by the embodiment of the present invention for assembling different teeth;

fig. 3 is the embodiment of the utility model provides a dig the construction of drill bit soon and have the schematic diagram of the geology of karst cave.

Wherein, in the figures, the respective reference numerals:

1-inner cylinder; 2-outer cylinder; 3-teeth; 4-wear resistant strips.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

Referring to fig. 1 to 3, the rotary drilling bit of the present invention will now be described.

Outer barrel 2, interior barrel 1 and a plurality of tooth 3, interior barrel 1 be used for being the inner tube terminal surface with the terminal surface of ground contact, and outer barrel 1 is used for being the urceolus terminal surface with the terminal surface of ground contact, and inner tube terminal surface and urceolus terminal surface all are equipped with

tooth

3, 2 covers of outer barrel are established on interior barrel 1, and interior barrel 1 and outer barrel 2 set up with the axle center, and outside barrel 2 was stretched out to the one end that is close to ground of interior barrel 1, a plurality of tooth 3 were including being used for being two kinds of at least tooth 3 of different shapes with the terminal surface of ground contact, and outer barrel 2 and interior barrel 1 at least one of them install tooth 3 of two kinds at least differences.

According to the rotary drilling bit of the embodiment, due to the fact that the teeth with different end face shapes are combined, the machining efficiency of each tooth to different geological strata is different, the rotary drilling bit can adapt to different geological strata, rock strata, mud strata, mudstone strata and various different geological mixed complex strata by adjusting the type of the tooth mounted on the rotary drilling bit, the construction efficiency can be improved, the loss of the drill bit can be reduced, the construction cost is reduced, and the economic benefit is improved. By adopting the drill bit structure of the inner and outer cylinders 2, if the stratum of the construction area contains more karst caves, when the short drill bit is constructed to the rock surface, because the space of the karst cave cavity is larger, the drill bit cylinder is easy to generate large-range shaking to cause the hole deviation problem of the bored pile construction when the inside of the karst cave is contacted with the rock surface at the lower part. Therefore, when a stratum containing more karst caves is constructed, the problem of hole deviation is solved by adopting a mode of lengthening the outer cylinder body 2, specifically, the length of the outer cylinder body 2 is larger than the height of the karst caves by 1m, the deviation rectifying effect is good, and the scheme is simple and easy to implement.

Further, referring to fig. 1 to 3, the teeth 3 are detachably connected to both the outer cylinder 2 and the inner cylinder 1. Because the drill bit can take place the loss in the use, and 3 parts of tooth are the main part of atress and wearing and tearing, consequently, with 3 detachable installations of tooth on the drill bit, can change at any time after the wearing and tearing, and need not to change whole drill bit, reduce cost effectively, simultaneously, when punching in the stratum of different geology, only need install corresponding tooth 3 combination can, need not to prepare a plurality of drill bits, greatly made things convenient for construction tool's transportation.

Further, referring to fig. 1 to 3, a plurality of teeth 33 are symmetrically arranged at equal intervals on the circumference of the end surfaces of the outer cylinder 2 and the inner cylinder 1 for contacting with the ground. The symmetrical arrangement can ensure that all teeth are stressed uniformly, thereby being beneficial to improving the drilling stability of the drill bit and prolonging the service life of the product.

Further, referring to fig. 1 to 3, the plurality of teeth 3 include tapered teeth having a tapered end surface, flat teeth having a flat end surface, and/or spherical teeth having a spherical end surface. The awl tooth mainly is applicable to the drilling in general rock geological formation, and the flat tooth mainly is applicable to earth geological formation and punches, and the ball tooth is applicable to the stratum that intensity exceeds 70Mpa, and when meetting complicated stratum, then has more the rock stratum characteristic and selects the drill bit that multiple tooth was loaded in mixture and punches, selects the drill bit that uses flat tooth and awl tooth or ball tooth to load in mixture when the layer was punched like the mudstone mixture. The preparation customization drill bit can cause construction cost to increase, compares with the loss that adopts conventional drill bit to cause because of the inefficiency of construction, and the independent assortment customization drill bit of this application has more economic benefits, and the time limit for a project cost that not only can reduce construction period to cause in the long run can also reduce relevant cost such as material.

Optionally, as an assembly scheme of the teeth on the drill bit, one of the teeth 3 is installed on the outer cylinder 2, and at least two of the teeth 3 are installed on the inner cylinder 1; or at least two kinds of teeth 3 are arranged on the outer cylinder body 2, and one kind of teeth 3 is arranged on the inner cylinder body 1; or the outer cylinder body 2 and the inner cylinder body 1 are both provided with at least two kinds of teeth 3.

Optionally, as an assembly scheme of the teeth 3 on the drill bit, the outer cylinder 2 is provided with flat teeth and tapered teeth, and the inner cylinder 1 is provided with flat teeth, tapered teeth or spherical teeth.

Optionally, as an assembly scheme of the teeth 3 on the drill bit, the outer cylinder 2 is provided with flat teeth or tapered teeth, and the inner cylinder 1 is provided with flat teeth and tapered teeth.

Further, referring to fig. 1 to 3, wear strips 4 are formed on the outer surfaces of the outer cylinder 2 and the inner cylinder 1, and the wear strips 4 are spirally arranged. The hardness of wear-resisting strip 4 for the barrel is higher, and it is between barrel and ground layer pore wall, plays the effect of protection section of thick bamboo wall, and simultaneously, the wear-resisting strip 4 of heliciform setting still can form the thread groove, is favorable to the discharge of the disintegrating slag that punches.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A rotary drill bit, comprising: outer barrel, interior barrel and a plurality of tooth, interior barrel is used for being the inner tube terminal surface with the terminal surface of ground contact, outer barrel is used for being the urceolus terminal surface with the terminal surface of ground contact, the inner tube terminal surface with the urceolus terminal surface all is equipped with tooth, outer barrel cover is established on the interior barrel, interior barrel with the coaxial center setting of outer barrel, the one end that is close to ground of interior barrel stretches out the urceolus is external, a plurality of tooth are including being used for two kinds at least tooth that are different shapes with the terminal surface of ground contact, outer barrel with at least one of them installs two kinds at least differences of interior barrel tooth.

2. The rotary drill bit of claim 1, wherein: the tooth with outer barrel and interior barrel are all detachable to be connected.

3. The rotary drill bit of claim 1, wherein: the teeth are symmetrically arranged on the circumference of the end face of the outer barrel at equal intervals; and/or a plurality of teeth are symmetrically arranged on the circumference of the end surface of the inner cylinder at equal intervals.

4. The rotary drill bit of claim 1, wherein: the teeth comprise tapered teeth with conical end surfaces, flat teeth with plane end surfaces and/or spherical teeth with spherical end surfaces.

5. The rotary drill bit according to any one of claims 1 to 4, characterized in that: one or more of the teeth are arranged on the outer cylinder body, and one or more of the teeth are arranged on the inner cylinder body.

6. The rotary excavating drill bit according to claim 4, characterized in that: one of the teeth is arranged on the outer cylinder body, and at least two of the teeth are arranged on the inner cylinder body; or at least two kinds of teeth are arranged on the outer cylinder body, and one kind of teeth is arranged on the inner cylinder body; or the outer cylinder body and the inner cylinder body are both provided with at least two kinds of teeth.

7. The rotary excavating drill bit according to claim 4, characterized in that: the outer cylinder body is provided with the flat teeth or the bevel teeth or the spherical teeth, and the inner cylinder body is provided with the flat teeth and the bevel teeth.

8. The rotary drill bit of claim 1, wherein: wear-resistant strips are formed on the outer surfaces of the outer cylinder body and the inner cylinder body, and the wear-resistant strips are arranged spirally.