SU1643675A1 - Percussive air tool for forming holes in soil - Google Patents

Abstract

The invention relates to construction and mining equipment, in particular, to percussion devices used, for example, for drilling wells in the ground. The goal is to simplify the design. The device includes a housing 1, inside which the hammer 2 with a window 3 and a cavity is placed with the possibility of reciprocating movement — in which is placed a cylindrical stepped nozzle (SP) 5. The latter is fixed to the housing 1 by means of an epastic cylindrical sleeve (B) 6, in which there are air passages 7 for exhausting compressed air. On the outer surface, B 6 has annular protrusions, the size of which in section corresponds to annular grooves 15, 16. In addition, B 6 is made with an annular cavity 20, which communicates with the axial channel 18 through the radial channel 17. Ring stops have a smaller diameter step 21, between which B 6 is placed. Each step of smaller diameter B 6 is made with an annular groove located at the end of the step of larger diameter. In operation, device B 6 is used as a shock absorber and reversal mechanism, which simplifies its design. 5 h. n. f-ly, 3 ill. (/

Description

1Z 16

14

17

FIG. I

Claims (6)

Claim 1. Pneumatic impact device for the formation of a well in the ground, including a housing, inside which a drummer with a window and a cavity in the rear part is mounted to move, to accommodate a step of a larger diameter cylindrical step pipe, installed with limited movement to change the operating mode of the device from direct stroke to the reverse stepped cylindrical pipe with stops on the steps of a smaller diameter and with an axial channel for connection to the air supply hose and an elastic sleeve with an air passage located between the casing and the step of the smaller diameter of the stepped pipe, characterized in that, in order to simplify the design, the sleeve is cylindrical with annular protrusions located on its spring surface and with an annular cavity located on its inner surface, and the casing is made with two groups of annular bores to accommodate the protrusions of the sleeve, the patrol being made with a radial channel for communicating the annular cavity of the sleeve with the axial channel of the pat cutting, and the stops on the nozzle are made circular, with the sleeve located between the stops of the nozzle, and the distance between the groups of annular bores on the housing along the longitudinal axis of the housing is equal to the amount of movement of the nozzle to change the operating mode of the device from direct to reverse. 2. The device pop. 1, characterized in that the annular protrusions of the sleeve are rectangular in cross section. 3. The device according to paragraphs. 1 and 2, characterized in that the sleeve is made stepped, while the step of a larger diameter is symmetrically between the steps of a smaller diameter, and the annular protrusions are located on the step of a larger diameter. 4. The device according to p. 3, I distinguish it by the fact that each step of a smaller diameter of the sleeve is made with an annular point located at the end of the step of a larger diameter. 5. The device pop. 1, characterized in that the side walls of the annular cavity of the sleeve are inclined to the bottom of the annular cavity and symmetrically with respect to the transverse axis of symmetry of the annular cavity. 6. The device according to claim 5, characterized in that the angle of inclination of the side wall 5 of the annular cavity to the bottom of the annular cavity is 45 °. 18 21 17 6 21 FIG. 7 20 17 FIG. 2 Compiled by A. Tostov Editor V. Bugrenkova Tehred M. Morgenthal Corrector M. Demchik Order 1224 Circulation 395 Subscription VNIIIPI of the State Committee for Inventions and Discoveries at the State Committee for Science and Technology 113035. Moscow, Zh-35, Raushskaya embankment, 4/5 Production and Publishing Plant Patent ”, Uzhgorod, 101 Gagarina St.