SU750074A1 - Hydraulic monitor tip - Google Patents

Description

The invention is intended for the destruction of rocks and other materials and relates, in particular, to jetters used in the mining and other industries. The nozzle of the jetting machine is known, including two coaxially disposed connecting pipes (external and internal) with channels and a bottom, of which the internal service, valve is stepped with echelon-shaped annular projections on the outer surface of the thickened middle part and with radial channels in the tail part; spring element, adapter; however, these two nozzles form an annular channel 1 between them. The main disadvantage of this nozzle is that the valve spring is located in the head part in front of the valve, and the inlet channels supplying the delivery liquid to the nozzle are located in the tail end of the nozzle, in which also made radial channels. All this increases the length of the nozzle body, as well as complicates it, which ultimately reduces the reliability of the mechanism in operation. The closest technical solution is a hydromonitor, which includes a platform, a turning mechanism, a barrel with a double pickup pipeline, two branches of which are counter-mounted in a branch pipe, a pulse-hydropercussion nozzle 2. The disadvantage of this technical solution is that the opposite branches of the pickup pipeline are connected to an additional a nozzle fixed in the tail part of the nozzle, which significantly increases the dimensions of the nozzle in length and does not eliminate additional channels in the tail part of the nozzle and, complicating its manufacture and reducing the reliability of the mechanism in operation. The purpose of the invention is to reduce the size and increase the operational reliability of the mechanism. This is achieved by the fact that the oppositely directed power supply nozzles are mounted on the external pipe in the area between the radially shaped annular projections and the radial channels of the internal pipe. In this case, the tail end of the inner pipe is placed outside and on it is located a valve spring.

FIG. 1 shows the nozzle gi: 1 monitor; in fig. 2 - a nozzle with a double distillation pipe and a compensator.

The proposed jetting nozzle includes a housing 1 with a pulse nozzle 2, a modular external connection 3 with channels 4, an exhaust nozzle 5 and two oppositely directed water supply nozzles 6; placed with the possibility of axial movement in the external pipe 3 and the internal pipe 7 serving as a valve with radial channels 8, a cusp-shaped annular protrusions 9 and a tail end 10 m on which the valve spring 12 is fixed between the external pipe 3 and the nut 11. The tail end 10 drilled along the longitudinal axis of the hole 13 into which, at a given preload (adjustment) of the valve spring 12, a pin 14 is sequentially inserted to protect the nut 11 from self-twisting.

The water supply system located opposite in the same plane is the iupers 6 located on the section of the external nozzle 3 between the circular annular projections 9 and the radial channels 8 of the internal nozzle 7.

By means of fittings 6, the nozzle is connected to the two oppositely directed branches of the distillation line 16 by means of cap nuts 15 (FIG. 2). The second ends of these branches are connected to the co.ampener 17, having an HH water supply connector 18. The censor 17 serves to repel the shock waves of the water hammer that forms in the legs of the pickup pipe 16..

Jet attachment works with; 1 following way.

Water under pressure enters through compensator 8 into compensator 17 and further along branches of expansion pipe 16 and connectors 7 enters the cavity of external nozzle 3 of nozzle and through annular gap between external and internal pipe 7 and further through exhaust nozzle 5 is thrown out or out. A hose (not shown) connected to the tube 5 is retracted to the pump reservoir.

A knee-shaped nozzle with an exhaust nozzle directed parallel to the pulsed soil 2 can be attached to the nozzle 5. In this case, the exhaust jet is used for useful work (hydraulic fracturing, hydraulic washing, hydro-irrigation, etc.) under the action of the velocity head acting on the worm-like annular projections 9 , the internal nozzle 7 is carried away with the front (to the left of the drawing), compressing the spring 12. When reaching the internal nozzle 7

the protrusion in the outer pipe 3 interrupts the outflow of water through the exhaust pipe 5 and opens the radial channels 8 through which the cavity of the external pipe 7 communicates with the pulse nozzle 2. Since

the area of the exhaust nozzle 5 is several (10-20) times larger than the cross section of the pulse nozzle 2, when it overlaps the internal nozzle 7 in the cavity of the external nozzle 3 and branch X of the accelerating pipe GB, a hydraulic

a blow that was amplified almost twice due to the collision in the cavity of the external pipe 3 of two streams of water moving in opposite directions in the corresponding branches of the striper 16.

As a result of water hammer pressure

increases several times in comparison with the initial (supplied) pressure of the ox, under the action of which there is an enhanced release (shot) of water through the 1-; pulse nozzle.

After an overpressure phase with a hydraulic shock, the phase of the lowered pressure occurs in the cavity of the external nozzle 3 and the legs of the distillation pipe 16 is equal in duration to the first phase. During this period, the spring 12 returns the inner nozzle 7 to the initial position shown in FIG. 1, opening the exhaust nozzle 5 and closing the radial channels 8. The outflow of water through the impulse nozzle 2 stops and resumes through the exhaust nozzle 5. Next, the described process is repeated.

Claims (2)

1. Nurok G. А. Hydromechanization of open-cast mining. M, Nedra, 1970, p. 172. 2. USSR author's certificate number 241367. class. E 21 C 25/60, 1967.