阅读说明：本技术 一种反循环粉尘取样钻头 (Reverse circulation dust sampling drill bit ) 是由 王琨 王海峰 王刚 于 2019-10-27 设计创作，主要内容包括：本发明内容主要提供了一种反循环粉尘取样钻头,其主要主要用于对于粉尘监测过程中的取样测量,对于煤粉瓦斯含量及定点粉尘取样的前期钻进及后期反循环抽样,由外壁钻体、切削片、内反循环管三大部分组成,通过将外壁钻体加工有含钻翼形状的刀体,在其内部放置有内反循环管,并在外壁钻体上镶嵌有切削片,通过切削片对钻孔进行切削钻进从而达到长距离开孔打钻的目的,在外壁钻体与内反循环管之间形成环形空间通道,从而保证冷却及反循环用介质在此流出,并将钻渣通过内反循环管进行排出。(The invention mainly provides a reverse circulation dust sampling drill bit which is mainly used for sampling and measuring in a dust monitoring process, and for early-stage drilling and later-stage reverse circulation sampling of coal dust gas content and fixed-point dust sampling.)

1. A reverse circulation dust sampling drill bit is characterized by comprising an outer wall drill body, cutting blades and an inner reverse circulation pipe, wherein the outer wall drill body is processed into a cutter body with a drill wing shape, the inner reverse circulation pipe is placed in the outer wall drill body, the cutting blades are embedded in the outer wall drill body, and a drill hole is drilled through the cutting blades.

2. The reverse circulation dust sampling drill according to claim 1, wherein one end of the outer wall body is a wing cutting shape having more than one wing, and cutting portions of the wings are formed with cutting insert grooves in which cutting blades are seated, and cooling holes are formed between two adjacent wings, and a reverse circulation collecting hole is formed at a top portion centered on the wings.

Technical Field

The invention mainly relates to a reverse circulation dust sampling drill bit which is mainly used for sampling and measuring in a dust monitoring process, and performing early drilling and later reverse circulation sampling on coal dust gas content and fixed-point dust sampling.

Background

In the fields of geological exploration and mining, stratum sampling is carried out, the content and the performance of different stratums are analyzed, the method is an indispensable link, in recent years, in the aspect of preventing and controlling coal and gas outburst, special treatment is carried out to different degrees, and outburst danger of a coal roadway working face is generally predicted through a drilling cutting index method, a composite index method and an R value index method.

The original sampling and measuring mode is that a drilling machine drilling tool is used for drilling, after the drilling is carried out to reach a specified position, the core taking pipe is used for sampling to a final hole position one by one, the core taking pipe is removed one by one after the sampling is finished, and finally the collected coal sample is taken out for detection.

Disclosure of Invention

The invention provides a reverse circulation dust sampling drill bit, which is mainly used for cutting drilling and dust collection of a drill hole in a fixed-point sampling operation and a pulverized coal sampling process.

A dust sampling drill bit with reverse circulation is composed of an external wall drill body, cutting blades and an internal reverse circulation tube.

One end of an outer wall drill body in a reverse circulation dust sampling drill bit is in a drill wing cutting shape with more than one blade, an embedded groove capable of placing a cutting blade is processed at the cutting part of the drill wing, a cooling hole is processed between two adjacent drill wings, a reverse circulation collecting hole is processed at the top with the drill wings as the center, and a thread or a plug-in connection mechanism for connection is processed at the other end of the outer wall drill body.

An inner reverse circulation pipe in a reverse circulation dust sampling drill bit is of a cylindrical inner through pipe structure, the inner reverse circulation pipe is fixedly connected with an outer wall drill body through a set screw, and an inner through hole of the inner reverse circulation pipe is communicated with a reverse circulation collecting hole in the outer wall drill body.

Description of the drawings:

FIG. 1 is a cross-sectional view of a reverse circulation dust sampling drill bit;

FIG. 2 is a top view of a reverse circulation dust sampling drill bit;

The device comprises a drill body, an outer wall, a set screw, a cooling hole, a cutting blade, a reverse circulation collecting hole, a protective wing, an inner reverse circulation pipe, an annular channel and a connecting mechanism, wherein the drill body comprises 1 part of the outer wall, 2 parts of the set screw, 3 parts of the cooling hole, 4 parts of the cutting blade, 5 parts of the reverse circulation collecting hole, 6 parts of the protective wing, 7 parts of the inner reverse.

Detailed Description

According to the figure, the top of an outer wall drill body 1 of a reverse circulation dust sampling drill bit is provided with a drill wing, a cutting blade 4 is arranged on the drill wing, the top of the outer wall drill body 1 with the drill wing as the center is provided with a reverse circulation collecting hole 5, the other end of the outer wall drill body 1 is provided with a connecting mechanism 9, a cooling hole 3 is arranged between two adjacent drill wings, the outer side of each drill wing of the outer wall drill body 1 is provided with a protective wing 6 which is distributed in an equal row, an inner reverse circulation pipe 7 which is concentrically arranged is arranged in the outer wall drill body 1 and is fixed by a fastening screw 2, and an annular channel 8 is formed between the inner reverse circulation pipe and the outer wall drill body 1.

Any structural changes made under the teaching of the present invention, which are similar or similar to the technical solutions of the present invention, fall within the protection scope of the present invention.

the techniques, shapes, and configurations not described in detail in the present invention are all known techniques.