SU889855A1 - Water gun jet nozzle - Google Patents

Description

one

The invention relates to the mining industry, in particular to hydro-impulse devices, and can be used for hydraulic destruction of rocks, coal and other materials,

Known nozzle jetting,. comprising three coaxially disposed connections — external and internal with channels and a bottom and intermediate, located between them, a stepped valve, an elastic element, an adapter, and a wave tube, in which there is a smaller internal cylindrical one. the valve stages are filled with an annular groove, and the channels in the wave tube are in communication with the annular groove l.

The disadvantage of this nozzle is the lack of a means for adjusting the preload of the valve spring.

The nozzle of a jetting device is also known, including a pulsed nozzle,

external, internal and intermediate branch pipes, a stepped valve with a spring, channels in the internal branch pipe, ke, as well as annular channels between the external and intermediate branch pipes 2.

The disadvantages of this nozzle are a significant return (on the body) of the reactive power of a pulsed jet, as well as a low operational reliability of the mechanism.

The purpose of the invention is to increase operational reliability and reduce the impact of a pulsed jet.

The goal is achieved by the fact that in the intermediate pipe there are outer and inner annular grooves connected by radial channels that communicate with the channels of the internal pipe and a pulse nozzle, while the internal pipe has the possibility of axial movement relative to the intermediate one due to the interaction with the valve spring. the valve has longitudinal and radial channels with the possibility of communication with the channels of the intermediate and internal nozzles. FIG. 1 shows a jet nozzle, a longitudinal section; in fig. 2 - the same, front view. The nozzle of the jetting machine consists of a movable sleeve 1 with a nozzle 2, an external nozzle 3 with an exhaust nozzle 4, an internal nozzle 5 with channels 6, a cavity 7 and a bottom 8, about an intermediate nozzle 9, a stepped channel 10, a valve spring 11 located inside the valve 10 between the bottom 8 of the inner nozzle 5. and the inner annular protrusion 12 of the valve 10, the adapter 13. The sleeve is made in the form of a cross, at the ends 14 of which there are holes 15 for the fingers 16 that enter the sockets 17 of the external nozzle 3. The finger 16 enters through the hole 15 the end of 14 chairs They are attached to one of the sockets 17 of the external nozzle 3 and secured with a pin 18. The screw or vtchivaya sleeve increases or decreases the preload and, consequently, the force of the spring 11 on the valve 10. The external annular groove 19, the internal annular groove 20 and the radial channels 21 connecting these grooves, which are permanently connected to the channels 6 and the cavity 7 of the internal nozzle 5 and the pulse nozzle 2. The internal nozzle 5 is placed in the intermediate nozzle 9 with the possibility of axial displacement and rested its 8 into the valve spring 11. The steps of the valve 10 are successively made through a single diameter of different diameter, and in the head stage of the valve 10 there are made channels 22 and additional radial channels 23, and in the body of the steps of a large diameter valve 10, which are in axial contact with the external branch pipe 3, longitudinal channels 24 and 25 are completed. At that, additional radial channels 23 of valve 10 in the period of its extreme front position are connected to channels 19-21 of intermediate pipe 9, channels 6 and internal pipe 5 and pulsed The nozzle 2. The nozzle of the jetting machine is screwed onto the shock pipeline (not shown) of a given length with its adapter 13, which is connected with the compensator - resonator (not shown) with the second end. After adjusting the nozzle to the specified mode of operation, water under pressure passes from the impact pipe through the cavity of the adapter 13, channels 25 and 24, and annular gaps between the valve 10 and the external nozzle 3 and is discharged through the exhaust nozzle 4 to the atmosphere or is discharged in a circular pattern back to the pump tank . Under the action of the velocity head, the valve 10 compresses the spring 11. When the valve 10 reaches the protrusion in the pipe 3, the outflow of water through the exhaust nozzle 4 is interrupted. The nozzle 2 through the cavity 7 of the internal pipe 5, channels 6, 20, 21, 19 and 23, annular gaps with valve 10 and the external pipe 3 and the longitudinal channels 24 and 25 communicate with the valve valve and the impact pipe. Since the cross section of exhaust valve 4 is several times larger than the cross section of nozzle 2, when the valve 10 closes the exhaust nipple in the impact pipe, a hydraulic shock is created, which is accompanied by an increase in pressure and throws a portion of the liquid through the impulse nozzle 2 onto the object of destruction. After the phase of increased pressure with a hydraulic shock, a phase of pressure decrease occurs, equal in duration to the first one. During this period, the spring 11 returns the valve 10 to its original position, opening the exhaust nipple 4 and shutting down the channels 23. The outflow of water through the pulse nozzle 2 stops and resumes through the exhaust nipple 4. The cycle repeats. The reaction force from the impulse of the impulse jet, acting on the bottom 8 of the internal nozzle 5, moves it back for a certain distance, compressing the spring 11, thereby reducing the return of the jetting nozzle back (to the housing) and facilitating better spring opening of the valve 10, which ultimately the result leads to increased operational reliability of the mechanism. In addition, with this design, a reduction in the dimensions of the mechanism is achieved, both in diameter and in length. This design of a stepped valve with longitudinal channels and annular protrusions of a larger diameter creates an increased undulating velocity flow of water as it passes through.

Claims (1)

The claims and A hydraulic monitor nozzle including a pulse nozzle, an external inner and intermediate nozzles, a stepped valve with a spring, a valve in the internal> 0 nozzle, and also annular channels - * between the external and intermediate nozzles, characterized in that, in order to increase operational reliability and reducing the recoil of the pulsed jet, in the intermediate nozzle, the outer and inner annular grooves are connected by radial channels that communicate with the channels of the inner nozzle and the pulse nozzle, while the inner the tubes has the possibility of axial movement relative to the intermediate due to interaction with the valve spring, and longitudinal and radial channels are made in the valve with the possibility of communication with the channels of the intermediate and internal pipes.