CN218062208U

CN218062208U - Core bit capable of preventing core from losing

Info

Publication number: CN218062208U
Application number: CN202220987720.1U
Authority: CN
Inventors: 肖起辉; 张开放; 陈洪恩; 严悦
Original assignee: Anhui University of Science and Technology
Current assignee: Anhui University of Science and Technology
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-12-16
Anticipated expiration: 2032-04-26

Abstract

The utility model relates to a core bit for preventing the core from losing, which comprises a cylindrical drill body, a diamond composite sheet cutting edge, a separation blade, a connecting lug, a bolt and a limiter; the cutting edge of the diamond composite sheet is positioned at the bottom of the cylindrical drill body, the baffle is positioned at the inner diameter change position inside the cylindrical drill body, the connecting lug and the cylindrical drill body are fixed through welding, the baffle and the connecting lug are connected through a bolt, the baffle can be rotated to a position vertical to the cylindrical drill body by water flowing in the core pipe by the coring drill bit capable of preventing the core from being lost, the stop piece can be limited by the stop piece tail end limiter to rotate to a negative angle, and meanwhile, the upward movement of the core which is just taken cannot be influenced; therefore, the problem that the rock core is lost during coring can be effectively solved through the action of the blocking piece, the rock stratum distribution condition of the cored rock can be completely reflected, and the measured rock mechanical property and the rock stratum analysis result are more accurate.

Description

Core bit capable of preventing core from losing

Technical Field

The utility model relates to a core bit technical field specifically is a prevent core bit that core lost.

Background

When the mechanical property of roadway (or tunnel) rock and the distribution condition of a top floor rock stratum are required to be measured, in-situ coring is usually required on site, when the rock core is required to be taken out from a rock core tube, silt and rock debris can be left in a hole due to downward drilling and coring, the rock core tube can be smoothly lifted by flushing away the silt and the rock debris with water flow at the moment, but because the drill bit is not blocked, the rock core in the rock core tube is likely to be flushed down by the water flow, so that the rock core is lost, and further the analysis result of the rock stratum can be influenced, and therefore, a coring drill bit for preventing the rock core from being lost is necessary to be designed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at improving the above-mentioned problem that prior art exists and the coring bit that prevents that the core from losing that proposes, the utility model discloses a characteristics are, have four in coring bit to lean on to rotate with drill bit wall vertically separation blade by with drill bit wall to can prevent that the core in the core tube from being washed away by rivers, for realizing above-mentioned purpose, the utility model discloses a following technical scheme:

a core bit for preventing a core from being lost comprises a cylindrical drill body, a diamond composite sheet cutting edge, a blocking sheet, a connecting lug, a bolt and a limiter; the diamond composite sheet cutting edge is located the cylinder bores the body bottom, the separation blade is located the internal diameter change department of the internal portion of cylinder brill, the engaging lug is located the internal diameter change department of the internal portion of cylinder brill, and the engaging lug is in same horizontal plane through welded fastening and all engaging lugs with the cylinder brill body, and separation blade and engaging lug pass through bolted connection.

As the further optimization of the technical scheme, the cylindrical drill body, the separation blades and the connecting lugs are made of steel, the rigidity of the separation blades is not too small, and the four separation blades are arranged at 90 degrees, so that the separation blades are stressed uniformly and can completely hold the rock core.

As a further optimization of the technical scheme, the stop piece is arranged at the tail end of the separation blade, and when the separation blade is impacted by water flow, the separation blade can be limited to rotate to be perpendicular to the cylindrical drill body at most, so that the rock core in the rock core pipe is prevented from dropping and the upward movement of the rock core is not influenced.

Compared with the prior art, the utility model, its beneficial effect embodies: the core bit capable of preventing the core from being lost can rotate the blocking piece to a position vertical to the cylindrical drill body through water flowing in the core pipe, and the limiting device at the tail end of the blocking piece can limit the blocking piece to rotate to a negative angle and cannot influence the upward movement of the core which is just taken; therefore, the problem that the rock core is lost during coring can be effectively solved through the action of the separation blade, the rock stratum distribution condition can be completely reflected by the obtained rock core, and the measured rock mechanical property and the rock stratum analysis result are more accurate.

Drawings

FIG. 1 is a top view of the core bit assembly of the present invention for preventing the core from being lost

FIG. 2 is a main body diagram of the core bit assembly for preventing the core from being lost

Figure 3 is a detail view of the internal baffle of the coring bit for preventing the core from losing

In the figure: 1 cylindrical drill body, 1-1 connecting lug, 2 diamond composite sheet cutting edge, 3 blocking sheets, 3-1 bolt and 3-2 limiting stopper

Detailed Description

The preferred embodiment of the present invention for a core bit to prevent core loss is described below with reference to the accompanying drawings.

With reference to fig. 1, 2 and 3, the coring bit for preventing the core from being lost comprises a cylindrical drill body 1, a diamond composite sheet cutting edge 2, a separation blade 3, a connecting lug 1-1, a bolt 3-1 and a limiter 3-2; the cutting edge 2 of the diamond composite sheet is positioned at the bottom of the cylindrical drill body 1, the separation blade 3 is positioned at the inner diameter change position inside the cylindrical drill body 1, the connecting lug 1-1 and the cylindrical drill body 1 are fixed through welding, all the connecting lugs 1-1 are positioned at the same level, and the separation blade 3 is connected with the connecting lugs 1-1 through bolts 3-1; the cylindrical drill body 1, the separation blade 3 and the connecting lug 1-1 are made of steel, the rigidity of the separation blade 3 is not too small, the four separation blades 3 are installed at 90 degrees, the separation blade 3 is evenly stressed and can completely hold a rock core, the end of the separation blade 3 is provided with the stopper 3-2, when the separation blade 3 is impacted by water flow, the separation blade 3 can be limited to rotate to be perpendicular to the cylindrical drill body 1 at most, the rock core in the rock core pipe is prevented from falling, and the upward movement of the rock core is not influenced.

Example 1:

at first with bolt 3-1 with four separation blades 3 and engaging lug 1-1 connection, will assemble again the utility model discloses core drill bit is installed on getting the core machine, will get the core machine and remove the core position of predetermined, then start and get the core machine and carry out the coring work, need wash by water in the core pipe in the in-process of getting the core in order to reach the effect of washing away silt and rock detritus and cooling the drill bit, the separation blade 3 of installing in cylindrical drill body 1 this moment can be washed to the position perpendicular with cylindrical drill body inner wall by rivers, owing to install stopper 3-2 at separation blade 3 end, can prevent that separation blade 3 from being washed the negative angle, four separation blades 3 combined action at this moment block the rock core in the core pipe, prevent that the rock core from dropping and causing the loss, mention the core pipe after the coring work stops, then slowly pour the rock core in the core pipe, at last serial number for the rock core according to the order, coring work finishes.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A core bit that prevents that core is lost which characterized in that: comprises a cylindrical drill body, a diamond composite sheet cutting edge, a separation blade, a connecting lug, a bolt and a limiter; the diamond composite sheet cutting edge is located the cylindrical bores the body bottom, the separation blade is located the inside internal diameter change department of the cylindrical body of boring, the engaging lug is located the inside internal diameter change department of the cylindrical body of boring, and the engaging lug is in same horizontal plane through welded fastening and all engaging lugs with the cylindrical body of boring, and separation blade and engaging lug pass through bolted connection.

2. A core drill bit for preventing loss of a core as set forth in claim 1, wherein: the cylindrical drill body, the separation blades and the connecting lugs are made of steel, the rigidity of the separation blades is not small, and the four separation blades are arranged at 90 degrees, so that the separation blades are stressed uniformly and can completely hold the rock core.

3. A core drill bit for preventing loss of a core as set forth in claim 1, wherein: the end of the separation blade is provided with the stopper, and when the separation blade is impacted by water flow, the separation blade can be limited to rotate to be perpendicular to the cylindrical drill body at most, so that the falling of the core in the core tube is prevented, and the upward movement of the core is not influenced.