RU2343265C1 - Rig for anchor bore drilling - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: invention refers to mining, particularly to drilling equipment and can be employed in rigs for anchor bores drilling in hard rocks The rig incorporates drill rod, its rotator, rest-feeder, air hammer, and bracket with control levers. The air hammer is assembled between the rotator and the rest-feeder coaxially with the drill rod, its rotator and the rest-feeder. The air hammer with its upper end is freely donned on guiding bushing of rotator case coaxial with it, while with its lower end it rests on an elastic shock bumper installed on the rest-feeder and fixed with the bushing put on the case of the air hammer and inserted into circular slot of an upper cover of the rest-feeder.

EFFECT: increased service life of rig and ensuring safe working conditions for mine workers due to eliminating vibrations from case of air hammer to rig structure.

2 dwg

Description

The technical solution relates to the mining industry, namely to drilling equipment, and can find application in machines for drilling anchor wells in solid rocks.

Known electric rotary hammer drill (see Alim O.D. and other Drilling machines. - Gosgortekhizdat.-1960 - P.197), including a rotator with a drill rod, a solenoid or pneumatic hammer mechanism and a frame with a hydraulic feed mechanism to the bottom of the rotator with a drill rod.

The disadvantages of the described drilling machine include the misalignment of the shock mechanism and the rotator of the drill rod with the hydraulic feed mechanism of the rotator with the drill rod, which contributes to the occurrence of a tipping moment from the reaction of the bottom hole and, as a result, leads to the loss of stability of the drilling machine during drilling.

The closest in technical essence and the set of essential features is a machine for drilling anchor wells (see RF patent No. 2298628, ЕВВ 3/02, ЕВВ 6/00, published in BI No. 13, 2007), including a drill rod, rotator drill rod, support-feeder, hammer and bracket with control levers. A pneumatic hammer is installed between the rotator of the drill rod and the support-feed, and the hammer, drill rod, its rotator and the support-feeder are installed coaxially.

Such a constructive solution of the machine ensures that the direction of the feed force of the support-feeder coincides with the axes of the drill rod, rotator of the drill rod and hammer, which, in turn, eliminates the possibility of a tipping moment during drilling and, as a result, ensures stable operation of the machine.

The disadvantage of this machine is that a hammer installed between the drill rod rotator and the support-feeder is attached to the housing of the drill rod rotator and transfers dynamic reactive loads arising during its operation to the entire machine structure, reducing its strength. In addition, the vibration of the machine structure that arose as a result of this is transmitted through the control handles to the hands of the miner, which is unacceptable according to safety rules when exceeding normative permissible values.

The technical task of the proposed solution is to increase the durability of the machine and ensure safe working conditions for the miner during its operation by eliminating the transmission of vibration from the hammer body to the machine structure.

This is achieved by the fact that in the machine for drilling anchor wells, including a drill rod, drill rod rotator, feed support, an arm with control handles and a hammer installed between the drill rod rotator and support support, coaxially with the drill rod, its rotator and support with the transmitter, according to the technical solution, the upper hammer is loosely mounted on the guide sleeve of the housing of the specified rotator, coaxial with it, and the lower one is supported by an elastic shock absorber mounted on the support-feeder, while The static shock absorber is fixed by a sleeve put on the hammer body and inserted into the ring groove of the upper cover of the support-feeder.

Such a constructive solution of the proposed machine eliminates the possibility of transferring dynamic dynamic loads to the design of the machine and, therefore, to the hands of the miner during his work. This is achieved by damping the vibration of the hammer body with an elastic shock absorber installed between the hammer and the upper cover of the support-feeder, which prevents extreme loads from occurring in the machine nodes and thereby increases the durability of the machine and safe working conditions for miners during its operation. The specified fixation of the elastic shock absorber will prevent unauthorized loss of the elastic shock absorber from under the hammer during operation, which will increase the reliability of the machine.

The essence of the technical solution is illustrated by an example of a specific design and by drawings (Figs. 1 and 2), in which Fig. 1 shows a general view of a machine for drilling anchor wells, and in Fig. 2 - view I on an enlarged scale with partial breaks.

The machine includes a drill rod 1 (hereinafter - rod 1), a rotator 2 of a drill rod 1 (hereinafter - rotator 2) mounted on the housing of the support-feeder 3 through an intermediate spacer 4 with longitudinal grooves 5. The longitudinal grooves 5 are used for installation between the housing of the support- the feeder 3 and the rotator 2 of the hammer 6 and securing the latter to the body of the rotator 2.

The air hammer 6 with its upper end loosely mounted on the guide sleeve 7 of the rotator housing 2, and the lower end is supported by an elastic shock absorber 8 mounted on the support-feeder 3.

The hammer 6, the drill rod 1, its rotator 2, the support-feeder 3 and the guide sleeve 7 are installed coaxially.

An elastic shock absorber 8 is fixed between the hammer 6 and the support-feeder 3 by means of a sleeve 9, put on the body of the hammer 6 and inserted into the annular groove 10 of the upper cover of the support-feeder 3.

The machine is controlled by control handles (not indicated) located on the bracket 11, pivotally attached to the rotator housing 2.

The work of the machine is carried out in the following sequence. The machine is installed on the working soil on the base of the support-feeder 3 and is held upright by the miner using the bracket 11. Then, a command is given to supply air to the piston cavities of the support-feeder 3. In this case, the rotator 2 together with the rod 1 moves to the bottom. After the rod 1 reaches the bottom, commands are given to the rotator 2 to rotate the rod 1 and simultaneously the hammer 6 to transmit axial dynamic loads to the rod 1. In this case, the axial dynamic loads from the pneumatic hammer 6 are transmitted directly through the hollow shaft of the rotator 2 to the rod 1, and the dynamic dynamic loads are absorbed by the elastic shock absorber 8 mounted on the support-feeder 3. Thus, the rotary-shock method of drilling anchor wells is carried out.

In the case of an anchor well sinking in a coal or rock mass with a strength of up to 6 units on the scale of prof. Protodyakonova M.M. drilling can be performed without the use of a hammer 6. In this case, the hammer 6 is either turned off or removed through the longitudinal grooves 5 of the spacer 4.

Claims (1)

An anchor drilling machine, including a drill rod, drill rod rotator, feed support, an arm with control handles and a hammer mounted between the drill rotator and feed support coaxially with the drill rod, its rotator and feed support, characterized in that the pneumatic hammer with its upper end loosely mounted on the guide sleeve of the housing of the specified rotator, coaxial with it, and the lower one is supported by an elastic shock absorber mounted on the support-feeder, while the elastic shock absorber is fixed in a sleeve put on a hammer body and inserted into the annular groove of the upper cover of the support-feeder.

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