SU1668674A1 - Reamer for stepped drilling of raises - Google Patents

Abstract

The invention relates to the mining industry and m. used in the drilling of rising workings of large diameter. The goal is to increase the reliability of work when drilling in a top-down manner. The expander consists of drill heads (BG) 2-4, placed on the drive rod 1, and the fixation mechanism of the BG relative to the rod 1. The mechanism consists of abutments (Y) 13 and 14 that are spring-loaded against each other and placed on the rod 1 with the possibility of limited axial movement . In the smaller diameter BG 2, there are blind vertical grooves (P) 17, and in BG 3 and 4, deaf P 21 and 25 and through P 20 and 24 are made. BG 2 - 4 have grooves 16, 18, 19, 22 and 23 communicated with P 17, 21 and 25. Sequentially fixing V 13 with P 17, 21 and 25, step-up drilling is carried out. Translation 13 and 14 from one BG to another BG produced through P 20 and 24. 9 Il.

Description

WITH

with

The invention relates to the mining industry and can be used in the drilling of large diameter uphole openings.

The purpose of the invention is to increase the reliability of operation when drilling from top to bottom.

Figure 1 shows a longitudinal section of the expander; figure 2 - section aa in figure 1; on fig.Z - section BB in figure 1; figure 4 is a section bb In figure 1; figure 5 is a section of GG in figure 1; 6 to 9 show the positions of the mechanism for sequential fixation of drill heads.

Along the drive rod 1, the reamer for the stepped drilling of the rising workings is installed with the possibility

axial movement of drill heads 2-4 with cones. On the slots 8 of the rod 1 between the ring 9 and the thrust collar 10, bushings 11 and 12 of the main and additional stops 13 and 14 are installed. A spring 15 is placed between the bushings. A groove 16 and blind vertical grooves 17 are made under the stops 13 in the case of a smaller diameter drilling head 2. sleeves 11. In the case of the drill head 3 there are made grooves 18 and 19 interconnected through vertical grooves 20, and there are deaf vertical grooves 21 under the stops 14. In the case of the drill head 4 there are grooves 22 and 23 interconnected through vertical grooves 24,and there are deaf grooves 25 prp stops 13. The springs 13 and 14 sprung between each other form

ABOUT

about

00 CN VJ

-N

the mechanism of sequential fixation of the drill heads relative to the drive rod.

A reamer for stepwise drilling of raised workings works as follows.

By drilling with the cones 5, the stops 13 are located in the slots 17 of the body of the drill head 2 (FIG. 1). Giving the drive rod 1 down to the drill bit creates the necessary force and torque for drilling. In this case, the pressure force is transmitted by the stop shoulder 10 to the sleeve 12, which is in contact with the sleeve 11, and through the stops 13 entering the grooves 17, is transferred to the body 2, and the torque is transmitted by the stops 13 of the sleeve 11 connected by splines 8 to the driving bar one.

At the end of the drilling of the ascending drilling head 2, the driving rod 1 is pushed along the rest to lie on the bottom of the drilling head 2 upward until the contacting of the stops 14 in the end of the groove 18 of the housing of the drilling head 3. Compressing the ring 9 with the sleeve 9 and the sleeve 11 barbell. 1 is rotated (Fig. 6). In this case, the stops 14, moving along the face of the grooves 18 of the drill head 3 fixed to the bottom of the body, are set against the through grooves 20 and enter into them under the action of the spring 15. The drive rod 1 serves up to the contact of the lugs 14 in the end of the groove 22 of the housing of the drilling head 4 (Fig.7). Turning the lugs 13 of the drive rod 1 at a certain angle relative to the through grooves 20 (Fig. 8), the drive rod 1 is fed downward, pressing the stops 13 against the end of the groove 19 of the housing of the drill head 3. When the drive rod 1 rotates, spring 15 t in the grooves 21 (Fig.9). Drilling of the drilling head 6 that revolves with the cones 6 is made. Then the driving rod 1 is fed along the rest to lie on the sides of the drilling heads 2 and 3 upwards and the stops 13 m 14 are pulled out through the slots 24 into the bore 23 of the drill head 4.

with respect to the slots 24 at a certain angle, the stops 13 are pressed against the end of the groove 23 and, by rotating the driving rod 1, under the action of the spring 15, they are inserted into the grooves 25, after which the lifting head 7 of the drilling head 7 that is rising up with cones 7 is drilled. , the output from the grooves 25 stops 13, and, turning them at a certain angle, pressed against the end of the groove 23, turned against the through grooves 24, into which they fall under the action of the spring 15. Through the grooves 24, the stops 13 and 14 are fed into the grooves 19 and 22 from where the same way through the grooves 23 o and provided to the bore 16 and 18. Clamps 13 stops to end the bore 16 and rotating the drive rod 1 is introduced into the stops 13 in the grooves 17 of the drill head body 2, after which drilling resumes rebelling dissolved in previously described sequences. The height of the grooves 16,18,19 and 22, providing the possibility of rotation of the sleeves 11 and 12 with the stops 13 and 14 relative to the stationary drilling heads, must be at least the height of these sleeves.

Claims (1)

DETAILED DESCRIPTION OF THE INVENTION An extender for step boring of raised workings, including a driving rod, drilling heads with blind and through grooves on the inner surface mounted on a driving rod, and a fixing mechanism of drilling heads relative to the driving rod with stops mounted on the driving rod with the possibility of interfacing with vertical grooves , characterized in that, in order to increase the reliability of operation when drilling from top to bottom, the grooves are made in the heads, communicated with blind grooves, and The fixation mechanism is provided with additional stops, spring-loaded with respect to the main ones, the main and additional stops are located on the drive rod with the possibility of limited axial movement, and only deaf vertical grooves are made on the smaller diameter of the drill head. -s G  c 66 C 20 21 18 Shg5 Fy 15 12 SN is four "Si I four go P 24 ; / FIG. 7 15 73 77 FIG. eight 2 / 20 0US.9