阅读说明：本技术 矿井遗留锚杆开丝装置和方法 (Mine left-behind anchor rod wire-cutting device and method ) 是由 张源 胥振 万志军 他旭鹏 覃述兵 刘泗斐 郭源源 于 2021-08-02 设计创作，主要内容包括：本发明公开了一种矿井遗留锚杆开丝装置和方法,包括一个套丝筒和限位筒,限位筒套在套丝筒上近遗留锚杆的一端,套丝筒能够相对于限位筒在其轴向移动；套丝筒的近遗留锚杆的一端内设置有板牙,并通过紧固螺母固定,板牙中设置有板牙刀头,套丝筒的另一端设置有用于与液压锚杆钻机连接的套筒尾部接口；限位筒近遗留锚杆的一端连接有液压杆。本发明能够极大的方便井下的操作,提升遗留锚杆的改造速度。本发明能够充分利用井下原有设备,将井下原有液压锚杆钻机与套丝筒结合,方便快捷,成本低廉,可实现性较强。(The invention discloses a mine left-behind anchor rod threading device and a mine left-behind anchor rod threading method, wherein the mine left-behind anchor rod threading device comprises a threading barrel and a limiting barrel, the limiting barrel is sleeved on the threading barrel and is close to one end of a left-behind anchor rod, and the threading barrel can move in the axial direction of the limiting barrel relative to the limiting barrel; a threading die is arranged in one end of the threading cylinder close to the left anchor rod and is fixed through a fastening nut, a threading die tool bit is arranged in the threading die, and a sleeve tail interface for connecting with a hydraulic anchor rod drilling machine is arranged at the other end of the threading cylinder; one end of the limiting cylinder, which is close to the left anchor rod, is connected with a hydraulic rod. The invention can greatly facilitate the underground operation and improve the transformation speed of the left anchor rod. The invention can fully utilize the original underground equipment, combine the original underground hydraulic jumbolter with the mantle fiber cylinder, and has the advantages of convenience, rapidness, low cost and strong realizability.)

1. The utility model provides a stock device of opening silk is left over in mine which characterized in that: the anchor rod limiting device comprises a threading barrel (4) and a limiting barrel (9), wherein the limiting barrel (9) is sleeved at one end, close to a left anchor rod, of the threading barrel (4), and the threading barrel (4) can move in the axial direction of the limiting barrel (9); a threading die (1) is arranged in one end, close to a left anchor rod (13), of the threading cylinder (4) and fixed through a fastening nut (2), a threading die tool bit (3) is arranged in the threading die (1), and a sleeve tail interface (8) used for being connected with a hydraulic anchor rod drilling machine (12) is arranged at the other end of the threading cylinder (4); one end of the limiting cylinder (9) close to the left anchor rod is connected with a hydraulic rod (11).

2. The mine residual bolt threading device of claim 1, characterized in that: the external surface of the screw sleeving barrel (4) is provided with an external thread (5), the inner wall of the limiting barrel (9) is provided with an internal thread matched with the external thread (5), and the limiting barrel (9) is sleeved on the screw sleeving barrel (4) and is connected with the screw sleeving barrel through a thread.

3. The mine residual bolt threading device of claim 1, characterized in that: a rotating shaft (10) is arranged between the hydraulic rod (11) and the limiting cylinder (9), and the hydraulic rod (11) can rotate relative to the limiting cylinder (9) under the driving of the rotating shaft (10).

4. The mine residual bolt threading device of claim 1, characterized in that: the middle part of the mantle fiber tube (4) is provided with a discharge hole (6).

5. The mine residual bolt threading device of claim 1, characterized in that: two limiting columns (7) are arranged on the outer wall of the threading barrel (4) and are respectively positioned at the positions close to the two ends of the threading barrel (4).

6. A method for opening a wire of a mine left anchor rod is characterized by comprising the following steps: the method comprises the following steps:

s1, measuring the length of the left anchor rod exposed out of the end of the coal wall, determining the length of the left anchor rod to be reserved, and intercepting the redundant length of the left anchor rod by using hydraulic tongs;

s2, selecting a die suitable for the diameter of the left anchor rod, installing the die in the sleeve, and fixing the die through a fastening nut;

s3, connecting one end of the threading cylinder with a hydraulic jumbolter at the tail interface of the sleeve, and adjusting the height of the hydraulic jumbolter to keep the height of the threading cylinder consistent with that of the left anchor rod;

s4, moving the threading barrel to enable the left anchor rod to be located in the threading barrel, adjusting the position of the cutting head of the threading die by adjusting the fastening nut to enable the cutting head of the threading die to be in close contact with the left anchor rod, and tightening the fastening nut to reinforce;

s5, after fixing the left anchor rod and the threading die, adjusting a hydraulic rod of the limiting cylinder to be fixed on one side of the coal wall, and fixing the stabilizing sleeve by adjusting the pressure of the hydraulic rod;

s6, the left anchor rod is fixed on one side of the coal wall, a hydraulic anchor rod drilling machine is started, the drilling machine rotates to drive a threading barrel to rotate, the threading barrel rotates in a limiting barrel through threads and moves forward, a threading die cutter head inside the threading barrel rotates to generate friction with the left anchor rod, and then the threading of the left anchor rod is realized.

7. The mine residual bolt threading method according to claim 6, characterized in that: in the step S5, the limiting cylinder is rotated to the limiting column at the front end of the threading cylinder, the angle of the hydraulic rod is adjusted by adjusting the rotating shaft, the hydraulic rod is fixed on the coal wall, and the hydraulic rod is adjusted to keep the limiting cylinder fixed.

8. The mine residual bolt threading method according to claim 6, characterized in that: in the step S6, the scraps generated during the thread cutting process of the left anchor rod are discharged through the discharge port during the rotation of the threading cylinder.

9. The mine residual bolt threading method according to claim 6, characterized in that: in step S6, will leave over the stock and link with tray nut after the silk, realize leaving over the stock and reform transform into the crab-bolt structure, realize leaving over the multiplexing of stock.

Technical Field

The invention belongs to the technical field of anchor bolt support, and particularly relates to a wire cutting device and method for a retained anchor bolt in a gob-side entry driving coal pillar.

Background

In the underground coal mine, when a roadway is excavated along the air, anchor rods can be used for supporting narrow coal pillars, so that the supporting strength of the coal pillars is improved. After the mining of the adjacent coal face is finished, a goaf can be formed in the mining range. The coal face is away from the goaf, a stoping roadway of the face is excavated along the goaf, and a coal pillar is left at the moment. The anchor rods in the stoping roadway of the adjacent coal face can still be left in the coal pillars. When the coal face is driving into a stoping roadway, if the coal pillar is narrow, the anchor rods left in the coal pillar may be exposed. Now need cut out operation such as silk to these stocks, leave over stock length unanimity in making the coal pillar, can install nut after the silk is opened, reform transform the stock into the crab-bolt structure. Thereby realize the multiplexing of stock, be favorable to strengthening the strutting to the tunnel, promote the reuse of stock.

At present, a plurality of thread cutting devices are available in the market, but due to the special underground environment and high gas, an explosion-proof device needs to be installed on an electric threading machine, and the cost is high. And current electronic mantle fiber machine passes through fixed die, rotates the stock and realizes opening the silk function, but when multiplexing leaving over the stock, the stock is fixed unable rotation within the coal pillar, can not fine supporting use with current electronic mantle fiber machine, can't realize leaving over the opening the silk function of stock. If a manual threading device is adopted, the number of underground anchor rods is large, the efficiency is low, and the threading function cannot be well realized. The device can make full use of the underground device, greatly facilitates underground operation, and improves the transformation speed of the left anchor rod.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide a mine left anchor rod wire-cutting device and method, so that the wire-cutting function of the mine left anchor rod is realized, and the purpose of reusing the left anchor rod is achieved.

In order to achieve the purpose, the invention adopts the technical scheme that:

a mine left anchor rod threading device comprises a threading barrel and a limiting barrel, wherein the limiting barrel is sleeved at one end, close to a left anchor rod, of the threading barrel, and the threading barrel can move in the axial direction of the limiting barrel relative to the limiting barrel; a threading die is arranged in one end of the threading cylinder close to the left anchor rod and is fixed through a fastening nut, a threading die tool bit is arranged in the threading die, and a sleeve tail interface for connecting with a hydraulic anchor rod drilling machine is arranged at the other end of the threading cylinder; one end of the limiting cylinder, which is close to the left anchor rod, is connected with a hydraulic rod.

The external surface of the threading barrel is provided with external threads, the inner wall of the limiting barrel is provided with internal threads matched with the external threads, and the limiting barrel is sleeved on the threading barrel and is connected with the threading barrel through threads.

A rotating shaft is arranged between the hydraulic rod and the limiting cylinder, and the hydraulic rod can rotate relative to the limiting cylinder under the driving of the rotating shaft.

The middle part of the mantle fiber tube is provided with a discharge hole.

Two limiting columns are arranged on the outer wall of the threading cylinder and are respectively positioned at the positions close to the two ends of the threading cylinder.

A method for opening a wire of a mine left anchor rod comprises the following steps:

s1, measuring the length of the left anchor rod exposed out of the end of the coal wall, determining the length of the left anchor rod to be reserved, and intercepting the redundant length of the left anchor rod by using hydraulic tongs;

s2, selecting a die suitable for the diameter of the left anchor rod, installing the die in the sleeve, and fixing the die through a fastening nut;

s3, connecting one end of the threading cylinder with a hydraulic jumbolter at the tail interface of the sleeve, and adjusting the height of the hydraulic jumbolter to keep the height of the threading cylinder consistent with that of the left anchor rod;

s4, moving the threading barrel to enable the left anchor rod to be located in the threading barrel, adjusting the position of the cutting head of the threading die by adjusting the fastening nut to enable the cutting head of the threading die to be in close contact with the left anchor rod, and tightening the fastening nut to reinforce;

s5, after fixing the left anchor rod and the threading die, adjusting a hydraulic rod of the limiting cylinder to be fixed on one side of the coal wall, and fixing the stabilizing sleeve by adjusting the pressure of the hydraulic rod;

s6, the left anchor rod is fixed on one side of the coal wall, a hydraulic anchor rod drilling machine is started, the drilling machine rotates to drive a threading barrel to rotate, the threading barrel rotates in a limiting barrel through threads and moves forward, a threading die cutter head inside the threading barrel rotates to generate friction with the left anchor rod, and then the threading of the left anchor rod is realized.

In the step S5, the limiting cylinder is rotated to the limiting column at the front end of the threading cylinder, the angle of the hydraulic rod is adjusted by adjusting the rotating shaft, the hydraulic rod is fixed on the coal wall, and the hydraulic rod is adjusted to keep the limiting cylinder fixed.

In the step S6, the scraps generated during the thread cutting process of the left anchor rod are discharged through the discharge port during the rotation of the threading cylinder.

In step S6, will leave over the stock and link with tray nut after the silk, realize leaving over the stock and reform transform into the crab-bolt structure, realize leaving over the multiplexing of stock.

Has the advantages that: the device and the method for opening the wire of the mine left anchor rod can greatly facilitate underground operation and improve the transformation speed of the left anchor rod. The invention can fully utilize the original underground equipment, combine the original underground hydraulic jumbolter with the mantle fiber cylinder, and has the advantages of convenience, rapidness, low cost and strong realizability.

Drawings

FIG. 1 is a front view of a mantle tube;

FIG. 2 is a side view of the mine residual bolt wire cutting device of the present invention

FIG. 3 is a schematic view of the method of using the mine residual bolt wire-cutting device of the present invention;

in the figure, 1-threading die, 2-fastening nut, 3-threading die tool bit, 4-threading barrel, 5-external thread, 6-discharge hole, 7-limiting column, 8-joint, 9-limiting barrel, 10-rotating shaft, 11-hydraulic rod, 12-hydraulic jumbolter, 13-left-over anchor rod and 14-coal wall.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1 to 3, the mine left-behind anchor rod threading device of the invention comprises a threading barrel 4 and a limiting barrel 9, wherein the limiting barrel 9 is sleeved on one end of the threading barrel 4 close to the left-behind anchor rod, and the threading barrel 4 can move in the axial direction relative to the limiting barrel 9; a threading die 1 is arranged in one end, close to a left anchor rod 13, of the threading cylinder 4 and is fixed through a fastening nut 2, a threading die tool bit 3 is arranged in the threading die 1, and a sleeve tail connector 8 used for being connected with a hydraulic anchor rod drilling machine 12 is arranged at the other end of the threading cylinder 4; one end of the limiting cylinder 9 close to the left anchor rod is connected with a hydraulic rod 11.

The external surface of the screw sleeve 4 is provided with an external thread 5, the inner wall of the limiting sleeve 9 is provided with an internal thread matched with the external thread 5, the limiting sleeve 9 is sleeved on the screw sleeve 4 and is connected with the screw sleeve 4 through a thread, and the screw sleeve 4 is axially moved relative to the limiting sleeve 9 by rotating the screw sleeve 4. Because the screw thread is opened on the surface of the mantle fiber section of thick bamboo 4 to can inject inside the spacing section of thick bamboo 9, guarantee the stability of mantle fiber section of thick bamboo 4.

A rotating shaft 10 is arranged between the hydraulic rod 11 and the limiting cylinder 9, and the hydraulic rod 11 can be driven by the rotating shaft 10 to rotate relative to the limiting cylinder 9.

The middle part of the threading barrel 4 is provided with a discharge hole 6 for discharging the fragments generated in the threading process of the left anchor rod.

Two limiting columns 7 are arranged on the outer wall of the threading barrel 4 and are respectively positioned at the positions close to the two ends of the threading barrel 4. The limiting column 7 is used for preventing the limiting cylinder 9 from falling off from the threading cylinder 4.

Based on the mine left anchor rod wire opening device, the invention provides a mine left anchor rod wire opening method, which comprises the following steps:

s1, measuring the length of the left anchor rod exposed out of the end of the coal wall, determining the length of the left anchor rod to be reserved, and intercepting the redundant length of the left anchor rod by using hydraulic tongs;

s2, selecting a die suitable for the diameter of the left anchor rod, installing the die in the sleeve, and fixing the die through a fastening nut;

s3, connecting one end of the threading cylinder with a hydraulic jumbolter at the tail interface of the sleeve, and adjusting the height of the hydraulic jumbolter to keep the height of the threading cylinder consistent with that of the left anchor rod;

s4, moving the threading barrel to enable the left anchor rod to be located in the threading barrel, adjusting the position of the cutting head of the threading die by adjusting the fastening nut to enable the cutting head of the threading die to be in close contact with the left anchor rod, and tightening the fastening nut to reinforce;

s5, after the left anchor rod and the threading die are fixed, rotating the limiting cylinder to the limiting column at the foremost end of the threading cylinder, adjusting the angle of the hydraulic rod by the rotating shaft, fixing the hydraulic rod on the coal wall, and adjusting the hydraulic rod to keep the limiting cylinder fixed, so that the stabilizing sleeve is fixed;

s6, fixing the left anchor rod on one side of the coal wall, starting a hydraulic anchor rod drilling machine, driving a threading cylinder to rotate by the rotation of the drilling machine, enabling the threading cylinder to rotate and advance in a limiting cylinder through threads, enabling a die cutter head in the threading cylinder to rotate to generate friction with the left anchor rod, further threading the left anchor rod, and discharging chips generated in the threading process of the left anchor rod through a discharge port in the rotation process of the threading cylinder; leave over the stock after will opening the silk and be linked with tray nut, realize leaving over the stock and reform transform into the crab-bolt structure, realize leaving over the multiplexing of stock.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.