CN218844240U

CN218844240U - Coal mine sampling drill rod

Info

Publication number: CN218844240U
Application number: CN202222829558.3U
Authority: CN
Inventors: 景向锋; 赵文亮; 王冠彪; 程军
Original assignee: Xiangcheng Weiye Intelligent Electromechanical Equipment Manufacturing Co ltd
Current assignee: Xiangcheng Weiye Intelligent Electromechanical Equipment Manufacturing Co ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-04-11
Anticipated expiration: 2032-10-26

Abstract

A coal mine sampling drill rod comprises a drill rod body, wherein a sampling tube is sleeved in a central hole of the drill rod body, the circumference of a tube body, close to a female head of the drill rod body, of the sampling tube is suspended and erected in the center of the central hole through a fixing piece, and the outer diameter of the sampling tube is smaller than the inner diameter of the central hole, so that a water passing gap is formed between the sampling tube and the inner wall of the drill rod body; one end of the sampling tube extends out of the male head of the drill rod body, and a sealing connecting end is formed at one end of the sampling tube extending out of the male head of the drill rod body; the other end of the sampling tube is parallel and level with the bottom end of the female head of the drill rod body, and the end of the sampling tube is provided with a sealing connecting hole matched with the sealing connecting end, so that after the male head and the female head between two adjacent drill rod bodies are in butt joint connection, the sealing connecting end is also in butt joint insertion into the sealing connecting hole to form sealing connection between two adjacent sampling tubes. The utility model discloses both realize the simple and easy of structure, satisfied the requirement to the leakproofness again, the effect is quite good.

Description

Coal mine sampling drill rod

Technical Field

The utility model relates to a colliery drilling rod technical field specifically is a colliery sample drilling rod.

Background

In the work of preventing and controlling coal and gas outburst disasters in China, the outburst danger of a coal bed is eliminated by widely adopting a gas pre-extraction mode, but because the length of a pre-extraction drill hole can reach more than one hundred meters, in the outburst prevention effect test, when the residual gas content of the coal bed after extraction is tested, a coal sample is often required to be directly sampled from a far coal deep part, then the gas content of the coal sample is tested by adopting a desorption method, and the gas content of a sampling position is estimated by calculation. According to the industrial standard, in the sampling process, because the coal body adsorbs a large amount of gas to be desorbed, the drilling depth is more than 20m, and the sampling time is not more than 10min. This has just provided very high requirement to the drilling rod of sample, especially the linking leakproofness between the sampling tube, and only the leakproofness has guaranteed, just can realize the big negative pressure suction in the sampling tube, just can and then reduce the sample time. Against this background, there are two main problems with the prior art drill rods with sampling tubes:

one is that after the drill rods are connected, the sealing of the connection position between sampling pipes in the drill rods cannot meet the preset requirement, and a larger negative pressure source cannot be applied to the sampling pipes;

secondly, the connection fixed knot between sampling tube and the drilling rod inside constructs comparatively complicatedly, has all caused the inconvenience to processing, the dress and the dismouting of sample drilling rod.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model aims at providing a colliery sample drilling rod has simplified the fixed connection mode between sampling tube and the drilling rod, has optimized the sealed linking structure between the sampling tube simultaneously, has both realized the simple and easy of structure, has satisfied the requirement to the leakproofness again, and the effect is quite good.

The utility model discloses a solve the technical scheme that above-mentioned problem was taken as follows:

a coal mine sampling drill rod comprises a drill rod body, wherein a sampling tube is sleeved in a central hole of the drill rod body, the circumference of a tube body, close to a female head of the drill rod body, of the sampling tube is suspended and erected in the center of the central hole through a fixing piece, and the outer diameter of the sampling tube is smaller than the inner diameter of the central hole, so that a water passing gap is formed between the sampling tube and the inner wall of the drill rod body;

one end of the sampling tube extends out of the male head of the drill rod body, and a sealing connecting end is formed at one end of the sampling tube extending out of the male head of the drill rod body; the other end of the sampling tube is parallel and level with the bottom end of the female head of the drill rod body, and the end of the sampling tube is provided with a sealing connecting hole matched with the sealing connecting end, so that after the male head and the female head between two adjacent drill rod bodies are in butt joint connection, the sealing connecting end is also in butt joint insertion into the sealing connecting hole to form sealing connection between two adjacent sampling tubes.

Preferably, the fixing part comprises a thread reinforcing sleeve and a positioning screw rod, a plurality of mounting holes are uniformly distributed on the circumference of the adjacent end part of the sampling tube in a closed mode, the thread reinforcing sleeve is vertically fixed in the mounting holes, positioning holes are formed in the side wall of the drill rod body corresponding to each mounting hole in a penetrating mode, after the positioning screw rod is inserted into the positioning holes, the bottom end of the positioning screw rod is in threaded connection with the thread reinforcing sleeve, the top end of the positioning screw rod is fixedly connected with the drill rod body, and the top end of the positioning screw rod is flush with the outer side wall of the drill rod body.

Preferably, the thread reinforcing sleeve is welded and fixed with the mounting hole, the bottom end of the thread reinforcing sleeve is flush with the inner wall of the through hole of the sampling tube, the top end of the thread reinforcing sleeve extends out of the mounting hole, and a gap is formed between the top end of the thread reinforcing sleeve and the inner wall of the central hole of the drill rod body.

Preferably, a plurality of O-shaped grooves for assembling the sealing rings are uniformly arranged on the circumference of the pipe body of the sealing connecting end at intervals.

Preferably, the outer diameter of the sealing connection end is smaller than the outer diameter of the sampling tube, and the inner diameter of the sealing connection hole is larger than the inner diameter of the through hole of the sampling tube.

Compared with the prior art, the utility model discloses following beneficial effect has:

the sampling drill rod is used as a negative pressure transmission channel of a sampling coal briquette, on one hand, the connection mode between the sampling pipe and the drill rod body is simplified, a complex connection structure is abandoned, only the connection form of the thread reinforcing sleeve and the positioning screw rod is adopted, the sampling pipe is provided with the thread reinforcing sleeves, the suspended fixation of the sampling pipe in the central hole of the drill rod body is realized by matching the positioning screw rod, the fixation can be completed only by drilling and welding during processing, the investment of machining is simplified, and the working efficiency is improved; on the other hand, the public female head structure of cooperation drilling rod body, sampling tube one end extends out and forms and insert the end, also be sealing connection end, the inserted hole is then seted up to one end, also be sealing connection hole, after public female head assembly, also just form between the sampling tube and insert and close the connection, and simultaneously, cooperation multichannel O type sealing washer, can realize simple and easy sealing connection between the sampling tube, though the structure is simple and easy, nevertheless insert the structure cooperation O type sealing washer that closes the connection, sealing performance can accomplish very well, compare the sealed mode that fills up of threaded connection cooperation, the leakproofness will improve by a short time.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the sampling tube;

FIG. 3 is a schematic view of the connected sampling drill rods.

The mark in the figure is: 1. the drilling rod body, 2, centre bore, 3, sampling tube, 31, sealing connection end, 32, sealing connection hole, 33, O type groove, 4, water clearance, 5, screw thread reinforcement cover, 6, positioning screw.

Detailed Description

The following description will specifically explain embodiments of the present invention with reference to the drawings.

As shown in the figures, the utility model discloses a coal mine sampling drill rod, including the drill rod body 1, the centre bore 2 endotheca of drill rod body 1 is equipped with the sampling tube 3, the body circumference that the sampling tube 3 is close to the female head of drill rod body 1 is unsettled through the mounting and is erect in the center of centre bore 2, and the external diameter of sampling tube 3 is less than the internal diameter of centre bore 2, so that water clearance 4 is formed between sampling tube 3 and the inner wall of drill rod body 1;

one end of the sampling tube 3 extends out of the male end of the drill rod body 1, and one end of the sampling tube extending out of the male end of the drill rod body 1 forms a sealing connecting end 31; the other end of the sampling tube 3 is flush with the bottom end of the female head of the drill rod body 1, and the end of the sampling tube 3 is provided with a sealing connecting hole 32 matched with the sealing connecting end 31, so that after the male head and the female head between two adjacent drill rod bodies 1 are in butt joint connection, the sealing connecting end 31 is also in butt joint insertion into the sealing connecting hole 32 to form sealing connection between two adjacent sampling tubes 3.

In this embodiment, the external diameter of seal connection end 31 is less than the external diameter of sampling tube 3, the internal diameter of seal connection hole 32 is greater than the through-hole internal diameter of sampling tube 3, specifically, 2 internal diameters of centre bore of drilling rod body 1 are 47mm, wall thickness 13mm, the external diameter of sampling tube 3 is 42mm, it is 2.5mm just to cross water clearance 4, the external diameter at the seal connection end 31 of 3 tip of sampling tube is 40mm, form the thick step of 1mm between it and the sampling tube 3, it is corresponding, the internal diameter of the seal connection hole 32 of the 3 other end of sampling tube also is 40mm, therefore, cooperation O type sealing washer can realize the high leakproofness between the sampling tube 3 and connect.

Further, in this embodiment, the mounting includes screw thread reinforcement sleeve 5 and positioning screw 6, a plurality of mounting holes have evenly been laid on closing the circumference of the adjacent tip of sampling tube 3, screw thread reinforcement sleeve 5 vertical fixation is in the mounting hole, it is provided with the locating hole all to link up corresponding every mounting hole on the lateral wall of drilling rod body 1, after positioning screw 6 inserted the locating hole, positioning screw 6's bottom with 5 threaded connection of screw thread reinforcement sleeve, the top with fixed connection between the drilling rod body 1, and positioning screw 6's top with the lateral wall parallel and level of drilling rod body 1.

Simultaneously, the thread reinforcing sleeve 5 with welded fastening between the mounting hole, the bottom of thread reinforcing sleeve 5 with the through-hole inner wall parallel and level of sampling tube 3, the top extends the mounting hole sets up, and the top of thread reinforcing sleeve 5 with the clearance has before the central hole inner wall of drilling rod body 1.

The internal diameter of mounting hole is unanimous with the external diameter of screw thread reinforcement sleeve 5, inserts 5 bottoms of screw thread reinforcement sleeve in the mounting hole after welded fastening, and 5 tops of screw thread reinforcement sleeve extend about mounting hole surface 1.8mm, and the requirement is not done here to specific size, must be less than the size of water clearance 4, mainly is for the convenience of the installation of inserting of sampling tube 3.

The length of positioning screw 6 can set up than longer at the initial installation stage, after inserting in the locating hole on drilling rod body 1 in its bottom, with 5 threaded connection of screw thread reinforcement cover, the top then can welded fastening with linking department between the drilling rod body 1, then the cutting off positioning screw 6 of unnecessary length, it can to polish the level and smooth again.

In order to ensure the sealing performance between the sampling tubes 3, in this embodiment, a plurality of O-shaped grooves 33 for assembling sealing rings are uniformly arranged at intervals on the circumference of the tube body of the sealing connection end 31, and the O-shaped sealing rings are assembled in the O-shaped grooves 33 to complete the insertion assembly.

Under operating condition, through the equipment of public female first screw thread between two sample drilling rods, at this in-process, sealed link 31 on two sampling tubes 3 can insert simultaneously in sealed connecting hole 32, treats public female first assembly and accomplishes, and sealed link 31 also inserts the bottom of sealed connecting hole 32 in step, accomplishes to insert to close to connect, can ensure under the effect of O type sealing washer in step and insert the leakproofness of closing the connection.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a coal mine sample drilling rod, includes drilling rod body (1), its characterized in that: a sampling pipe (3) is sleeved in the central hole (2) of the drill rod body (1), the circumference of the pipe body, close to the female head of the drill rod body (1), of the sampling pipe (3) is suspended and erected in the center of the central hole (2) through a fixing piece, and the outer diameter of the sampling pipe (3) is smaller than the inner diameter of the central hole (2), so that a water passing gap (4) is formed between the sampling pipe (3) and the inner wall of the drill rod body (1);

one end of the sampling tube (3) extends out of the male end of the drill rod body (1) and forms a sealing connecting end (31) with the end extending out of the male end of the drill rod body (1); the other end of the sampling tube (3) is flush with the bottom end of the female head of the drill rod body (1), the end of the sampling tube (3) is provided with a sealing connecting hole (32) matched with the sealing connecting end (31), so that after the male head and the female head between two adjacent drill rod bodies (1) are in butt joint connection, the sealing connecting end (31) is also in butt joint insertion into the sealing connecting hole (32) to form sealing connection between two adjacent sampling tubes (3).

2. A coal mine sampling drill rod as defined in claim 1, wherein: the mounting includes screw thread reinforcement cover (5) and positioning screw (6), evenly laid a plurality of mounting holes on the circumference of the adjacent tip of sampling tube (3) is closed, screw thread reinforcement cover (5) vertical fixation is in the mounting hole, it is provided with the locating hole all to link up to correspond every mounting hole on the lateral wall of drilling rod body (1), after positioning screw (6) inserted the locating hole, the bottom of positioning screw (6) with screw thread reinforcement cover (5) threaded connection, the top with fixed connection between drilling rod body (1), and the top of positioning screw (6) with the lateral wall parallel and level of drilling rod body (1).

3. A coal mine sampling drill rod as claimed in claim 2, wherein: the drill rod comprises a drill rod body (1) and a thread reinforcing sleeve (5), wherein the thread reinforcing sleeve (5) is welded and fixed with the mounting holes, the bottom end of the thread reinforcing sleeve (5) is flush with the inner wall of the through hole of the sampling tube (3), the top end of the thread reinforcing sleeve extends out of the mounting holes, and a gap is formed between the top end of the thread reinforcing sleeve (5) and the inner wall of the central hole of the drill rod body (1).

4. A coal mine sampling drill rod as defined in claim 1, wherein: and a plurality of O-shaped grooves (33) for assembling sealing rings are uniformly arranged on the circumference of the pipe body of the sealing connection end (31) at intervals.

5. A coal mine sampling drill rod as defined in claim 1, wherein: the external diameter of sealing connection end (31) is less than the external diameter of sampling tube (3), the internal diameter of sealing connection hole (32) is greater than the through-hole internal diameter of sampling tube (3).