SU103814A1 - Drilling rig - Google Patents

Description

The subject matter of the invention is an electric rotary percussion drilling rig.

The proposed drilling rig, in contrast to the known projectiles of a similar kind, provides simultaneous rotation of the tool and the creation of a shock effect on the rock through the drilling tool. This is achieved due to the use in the projectile mechanism of a spring-loaded wavy washer receiving rotation from the drive shaft. At the moments of running waves on the support rollers, the firing pin of the POLT is slowed down, and when the waves run down from the support washer, the firing pin produces a blow. This provides high-frequency shocks during the backward movement of the striker and with simultaneous rotation of the drill bit.

FIG. 1 shows a general view of the proposed projectile; in fig. 2 is a longitudinal section of its shock-rotation mechanism.

The drilling rig (Fig. 1) consists of a tubular bar 1, a rotary percussion mechanism 2, and an electric motor 3 mounted on a plate. It is suspended from the mast 4 of the drilling rig and, in the course of its operation, moves along guides; under the action of its own weight.

The shock-rotary mechanism (Fig. 2) is mounted in a steel cylinder 6, which includes the end of the motor shaft 7, connected to the drive shaft 8 by a friction clutch 9. The shaft 8 in the upper part is equipped with a radial roller bearing 10 and passes through a thrust nut P screwed into the walls of the cylinder 6. A thrust ball bearing 12 rests on this nut, which contacts the stop disk 13 mounted on the shaft 8. The cylinder of the stop disk 13 has an external cut on which the stop nut 14 is screwed to adjust the outer 15 and inner it has 16 springs causing strikes of the striker 17. Nut 14, sonrikas smiling with stubborn fingers 18, presses on the springs 15 and 16, ensuring their initial compression. The die 17 is associated with a wave washer 19 supported on the support rollers 20 and received from the shaft 8. The wave washer 19 has four waves that roll onto the four support rollers 20 mounted in a steel cylinder 6.

The transitional bushing sleeve 21 ends with a hardened steel tip 22, which strikes the top of the drill bit.

The transitional tulka 2G of the striker has a square cross-section and enters a square socket in the head of the drill rod.

When the motor 7 is rotated, the square shank of the shaft 8 rotates the striker 17 and the drill rod 23. Simultaneously, as a result of the spring-loaded wavy washer 19, rolling over the support rollers 20, it strikes the striker, frequent strikes of the striker on the drill rod 23 occur.

Subject invention

Claims (2)

1. Drilling projectile of rotary percussion drilling with an electric drive, distinguished by the fact that in order to communicate the striker strikes while simultaneously rotating the drilling projectile, a spring-loaded wavy washer was applied, resting on the support rollers with waves and receiving rotation from the drive shaft. 2. The shape of the drill string according to claim I, characterized in that for transmitting high-frequency strikes from the washer, the striker head is connected to the inner surface of the washer by a transition sleeve.