SU479494A1 - Jetting nozzle - Google Patents

Description

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BACKGROUND OF THE INVENTION The invention relates to impulse devices for the destruction of rocks and materials.

The nozzle of the jetting machine is known, comprising two coaxially arranged branch pipes (outer and inner) with channels and a bottom, forming between them an annular channel, a stepped valve, an elastic element, an adapter and a wave tube.

The proposed nozzle of the jetting machine differs from the one known for the fact that at a smaller internal cylindrical valve stage there is an annular groove, and in the wave tube there are channels connected with the annular groove. This increases the efficiency and stability of the nozzle.

Pa drawing shows the proposed nozzle.

Pasadka includes nozzles 1 with a central nozzle 2, an external nozzle 3 with an external nozzle 4, an internal nozzle 5 with channels 6 and a bottom 7, an intermediate nozzle 8, a valve 9 with an annular groove 10 on the inside smaller cylindrical stuni and channels 11 in the wall a larger step, a wave tube 12 with channels 13 communicated with an annular groove 10, an adapter 14 with channels 15, a shaft 16 of a jetting machine, a valve spring 17 placed in an annular deadlock of an intermediate branch pipe 8. The intermediate branch pipe 8 prevents the spring 17 from being accelerated th jet. In addition, it allows the use of a long and long-lasting spring, without breaking, without increasing the length of the valve 9. An annular channel 18 is formed between the forward spreaded section of the hydromonitor shaft 16 and the wave tube 12.

Water under pressure flows into the nozzle through the barrel 16 of the jetting machine, the annular channel 18, the channels 15 and further through the annular gap between the nozzles 3 and 8 and the outer nozzles 4 and is thrown onto the object of destruction. Under the action of a velocity head acting on the right end of the valve 9 and bristle-shaped annular grooves on its surface, the valve 9 is carried forward (left on the drawing), removing the spring 17. When the valve 9 has reached a protrusion in the socket 3, the outflow of water through the outer nozzles 4, the cavity is interrupted central nozzle 5 and nozzle

2 through the channels 6 communicate with the annular groove 10 and through the channels 13 - with the cavity of the wave tube 12. Since the total cross-section of the outer nozzles 4 is several times larger than the central nozzle 2, when it overlaps

a valve 9 in the barrel 16 of the jet monitor creates a hydraulic shock transmitted to the wave tube 12. When the pressure increases, there is an enhanced release (shot) of the fluid through the central nozzle 2. After the pressure phase with hydraulic hammer in the barrel 16 of the jet monitor, the reduced pressure phase occurs, equal in duration to the first . During this period, the spring 17 returns the clan 9 to its original position, opening the outer nozzles 4 and closing the channels 6. The outflow of water through the central nozzle 2 stops and resumes through the outer nozzles 4. The cycle repeats.

Subject invention

Jet attachment including two coaxially arranged nozzles (outer

and internal) with channels and bottom, forming between them an annular channel, a stepped valve, an elastic element, an adapter and a wave tube, characterized in that, in order to increase the efficiency and

the stability of its work, on a smaller internal cylindrical valve tread, an annular groove is made, and channels connected to the annular groove are made in the wave tube.

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