RU183522U1 - EJECTOR EARTH FILLING DEVICE - Google Patents

Abstract

The proposed utility model relates to hydromechanization, in particular, to technical means for extracting minerals from under water. The problem being solved by the proposed utility model is an increase in the efficiency devices by increasing the intensity of mass transfer in the mixing chamber between the working water and the sucked-in water-ground mixture. The technical result that can be obtained using the proposed technical solution is the creation of pressure pulsations in the jets of working water flowing from the ejection nozzles. The essence of the proposed utility model. The ejector dredger suction device comprises a suction tip 1, a mixing chamber 3, a working water supply channel 4, ejection nozzles 2, in front of which cavitation generators of pulsating pressure of working water 5, made in the form of a Venturi, are installed. In the process of soil intake, working water is supplied through channel 4 to the ejecting nozzles 2 from the pump. The jets of working water flowing from the ejection nozzles 2 at high speeds are mixed in the mixing chamber 3 with the suction flows of the water-soil mixture coming from the suction tip 1 and transfer kinetic energy to the suction flows as a result of mass transfer. In this case, the working water flowing out in the form of jets from nozzles 2 passes through cavitation pressure pulsation generators 5 in advance, in which the steady-state fluid flow is pulsating. The hydrodynamic interaction of pulsating jets with suction flows of the water-ground mixture significantly increases the intensity of mass transfer in mixing chamber 3 between the working water and the sucked-in water-ground mixture, since along with turbulent vortices, flow pulsations are involved in the mass transfer, causing both pressure changes and a change in the flow rate . Due to this, the efficiency is increased. ejector dredger suction device.

Description

The proposed utility model relates to hydromechanization, in particular, to technical means for extracting minerals from under water.

A suction dredger suction device is known, comprising a suction nozzle with a diffuser and a water supply manifold with ejection and erosion nozzles installed in front of the nozzle, which is equipped with a nozzle mounted coaxially on the suction nozzle (AS USSR No. 1146375, E02F 3/92, 1983). A disadvantage of the known device is the low efficiency of mixing and transferring energy from the working water to the water-soil mixture sucked from the tip, which reduces the efficiency devices. This is due to the fact that the jets of working water monotonously flow from the ejection nozzle and transfer the energy of the sucked-in water-soil mixture only due to turbulent vortices.

A suction device for an dredging projectile is known, including a suction tip with a mixing chamber and a grill and a collector with a washing and ejecting nozzles, which is equipped with a nozzle attached to the end of the mixing chamber from the inlet side, and a cowl mounted on the grill and located in front of the nozzle with the formation of an annular gap (USSR AS for invention No. 1308716 E02F 3/88, 05/28/1985). Due to the annular gap, an additional ejection jet is formed, which increases work efficiency. A disadvantage of the known device is the low efficiency of mixing and transferring energy to the water-soil mixture sucked from the tip from the working water flowing in the form of a jet from both the ejecting nozzle and an additional annular jet, which reduces the efficiency devices. This is due to the fact that the jets of working water flow monotonously from the ejection nozzle and from the annular gap and transmit the energy of the sucked-in water-soil mixture only due to turbulent vortices.

A suction device for an dredging projectile is known, including a suction tip with a mixing chamber and an ejector containing a collector located therein, connected to an ejector nozzle, and an ejector head with central ejector and erosion nozzles, connected by a water conduit to the collector, in which the collector is made in the form of a chamber with rings walls, and the ejector nozzle of the collector is made in the form of several nozzles, the longitudinal axes of which are focused on the longitudinal axis of the mixing chamber (A.S. etenie №1416617 E02F 3/88, 27.08.1986). Thanks to the ejector nozzle made in the form of several nozzles, an additional ejector stage is formed, which increases the efficiency of the device. A disadvantage of the known device is the low efficiency of mixing and transferring energy to the water-soil mixture sucked from the tip from the working water flowing in the form of jets from the central ejector nozzle and from additional nozzles, which reduces the efficiency devices. This is due to the fact that the jets of working water flow monotonously from the ejection nozzles of both stages and transmit the energy of the sucked-in water-soil mixture only due to turbulent vortices.

It is known and accepted as a prototype an ejector dredger suction device containing a suction tip, ejector nozzles, a mixing chamber, a working water supply channel (see Tseytlin F.D., Alyaev A.N. Hydromechanization of loading and unloading operations in river ports. - M. : Transport, 1977, p. 24, Fig. 9). A disadvantage of the known device is the low efficiency of mixing and transferring energy from the working water to the water-soil mixture sucked from the tip, which reduces the efficiency devices. This is due to the low intensity of mass transfer in the mixing chamber, since the jets of working water monotonously flow from the ejecting nozzles and transmit the energy of the sucked-in water-soil mixture in the mixing chamber only due to turbulent vortices.

The problem being solved by the proposed utility model is an increase in the efficiency devices by increasing the intensity of mass transfer in the mixing chamber between the working water and the sucked-in water-ground mixture.

The technical result that can be obtained using the proposed technical solution is the creation of pressure pulsations in the jets of working water flowing from the ejection nozzles.

To solve the problem with the achievement of the specified technical result in a known dredger suction device containing a suction nozzle, ejection nozzles, a mixing chamber, a working water supply channel, according to the proposed utility model, the suction device is equipped with cavitation generators of water pressure pulsations made in the form of a venturi installed in front of the ejection nozzles.

Additional options for the dredging device of the dredger are possible, in which it is advisable that:

- cavitation generators of pulsations of water pressure were connected with ejection nozzles;

- a cavitation generator of water pressure pulsations was installed in the working water supply channel.

The indicated advantages, as well as the features of the proposed utility model, are illustrated by the variants of its implementation with reference to the drawings: in FIG. 1 - ejector soil sampling device of the Central type with a pulsator installed in the channel for supplying working water; in FIG. 2 shows a central-type ejector intake device with a pulsator connected to an ejection nozzle; in FIG. 3 - ejector soil-intake device of the ring type with a pulsator installed in the channel for supplying working water; in FIG. 4 - ejector soil intake device of the jet-ring type with a pulsator installed in the channel for supplying working water; in FIG. 5 - ejector soil intake device of the jet-ring type with pulsators connected to the ejection nozzles; in FIG. 6 - ejector soil sampling device, in which the ejection nozzle is installed in front of the suction tip, with a pulsator installed in the channel for supplying working water; in FIG. 7 is an ejector suction device in which the ejection nozzle is installed in front of the suction tip, with a pulsator connected to the ejection nozzle.

The suction dredger suction device contains a suction tip 1, ejection nozzles 2, a mixing chamber 3, a working water supply channel 4, and also cavitation generators of water pressure pulsations 5 and 6, made in the form of a Venturi tube and installed in front of the ejection nozzles. Cavitation generators of pulsations of water pressure 5 are installed in the channel for supplying working water 4, and cavitation generators of pulsations of pressure of water 6 are connected to ejecting nozzles 2. The device can also be equipped with a collector of working water 7, nozzle 8 for soil erosion and a protective grill 9.

The ejector soil sampling device of the dredger operates as follows. In the process of soil intake, working water is supplied through channel 4 to the ejecting nozzles 2 from a pump (not shown). The jets of working water flowing from the ejection nozzles 2 at high speeds are mixed in the mixing chamber 3 with the suction flows of the water-soil mixture coming from the suction tip 1 and transfer kinetic energy to the suction flows as a result of mass transfer. In this case, the working water flowing out in the form of jets from nozzles 2 passes through cavitation pressure pulsation generators 5 or 6, made in the form of Venturi tubes, in which the stationary fluid flows into pulsating ones (see Pilipenko V.V. Cavitation self-oscillations. - Kiev: Science.Dumka, 1989, p. 5–79). The hydrodynamic interaction of pulsating jets with suction flows of the water-ground mixture significantly increases the intensity of mass transfer in mixing chamber 3 between the working water and the sucked-in water-ground mixture, since along with turbulent vortices, flow pulsations are involved in the mass transfer, causing both pressure changes and a change in the flow rate . Due to this, the efficiency is increased. ejector dredger suction device.

To increase the intensity of flow pulsations, cavitation generators of water pressure pulsations 6 can be connected to ejection nozzles 2. It should be noted that this will slightly increase the efficiency, but will complicate the design of the soil sampling device.

Claims (3)

1. An ejector dredger suction device containing a suction tip, ejection nozzles, a mixing chamber, a working water supply channel, characterized in that it is equipped with cavitation water pressure pulsation generators made in the form of a venturi installed in front of the ejection nozzles. 2. The ejector suction device of the dredger projectile according to claim 1, characterized in that the cavitation generator of pulsations of the water pressure is installed in the channel for supplying working water. 3. The ejector suction device of the dredger projectile according to claim 1, characterized in that the cavitation generators of the pulsations of the water pressure are connected to the ejection nozzles.

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