RU901U1 - Chamber mixer of heavy aerosol water mixtures - Google Patents

Abstract

A chamber mixer for heavy aerosol water mixtures containing a paint tank, to which a compressed air supply pipe is connected, a mixing chamber, a liquid supply pipe to the chamber and a mixture discharge pipe, characterized in that the cylindrical wave mixing chamber is hollow, its opposite end planes are perpendicular to rectilinear geometric axis of the chamber, the length of the chamber along its geometric axis is equal to the length of the hydraulic half-wave of the apparatus, compressed air is supplied through the longitudinal axis of the geometric axis of the chamber is longitudinal; the fluid was supplied into the chamber by a pipeline into the zone of intersection of the axis of the pipeline with the geometric axis of the chamber at a quarter of the length of the hydraulic wave equidistant from the end reflective planes.

Description

Chamber mixer of heavy aerosol water mixtures

The utility model relates to the field of metallurgy, construction, chemistry, and in particular, to foundry, for coating foundry molds with heavy paints. A device is known using a mixing chamber mounted on a pipe between the spray gun and the paint tank. This device is the closest to the proposed technical solution, but has the following disadvantages:

- the mixing chamber does not have an autonomous supply of compressed air, which, when a fluid is supplied into the chamber and an intense hydraulic wave arises at the same time, leads to a loss of system operability, as the high pressure zone created by the hydraulic wave, using short pneumatic connections, cuts off the reservoir from the compressed air line, and therefore the subsequent impulse to supply liquid to the chamber will not take place;

- due to the fact that the geometric parameters of the structural elements of the known device do not have wave coupling of the aspect ratio to the wave, the beam of energetically moss waves, including sound, pneumatic, hydraulic and their overtones, do not interact in order, do not enter into resonance, wave energy is not used ;

-in a known device uses the kinematic energy of the mass of a moving stream of compressed air, but because air mass is insignificant; the mixing process is at a low energy level - mixtures are inactive, inactive, non-sprayable, do not have dispersion - process; turns into mechanical spraying with poor results; - used in the known technical solution, in order to create a swirl of the drip, the transverse supply of compressed air into the mixing chamber can hardly be carried out, because The longitudinal kinetic physical wave that arose during this process, creating zones of increased pressure relative to the nominal value, crosses the passage openings of the fluid supply. Under these conditions, the use of special high-pressure equipment for feeding liquid into the chamber or a significant reduction in pressure in the chamber is inevitable, due to a decrease in the flow rate and thereby the process energy. The technical effect in the utility model is to increase the productivity of the mixing chamber and to obtain oversaturated, self-dispersing, mobile, abrasive-neutral, finely divided multiphase mixtures consisting of water, air and solid particles. The indicated effect is achieved by the fact that the described apparatus, which is technically universal for water mixtures and with a solution, has a pneumohydraulic, impulse system, open circulation in combined pneumatic and hydraulic flows and feedback on a given input and output signal using the energy of high-frequency vibration arising from amplitude resonance the main wave in the flow of compressed air and the same wave in liquids as well as resonant phenomena that occur in the pneumohydraulic circuit of the apparatus that produces stepwise saturation 2

water flows, breaks the material pass into tiny particles, surrounds them with an air gap, as a result of which the material loses viscosity and abrasion - the mixture, as a result of replacing friction-sliding, friction-rolling, acquires mobility. The working body (energy carrier) of the system is the main compressed air. The working fluid of the hydraulic part of the machine is a certain amount of material intended to create aerosols. The working object of the pneumohydraulic system is the deaerated-consumed working fluid, which is introduced into the stream of compressed air, moves and pulsates according to the laws of hydrodynamics, is saturated in the chamber with compressed air and discharged

through the idle exhaust air throttle to the mixture line and to the atmosphere. An aerosol mixture oversaturated with compressed air, flying at a speed of 12-14 m / s, a distance of 0.5-0.7 m from the nozzle exit of the line, explodes, creating a spray effect.

In FIG. I shows a general view of the mixer, in Fig. 2, the wave mixing chamber is II, in Fig. 3 is a sequence diagram of the pressure pulse in the zone (P) of the chamber. In Fig. 4 is a schematic representation of the mixing chamber II in the wave ratio.

In a static state, the device has the following structural and communication elements:

dual-purpose pre-saturation chamber I (FIGL): according to pneumatic parameters, this is a membrane-free pneumatic absorber with impulse charging; according to hydraulic parameters, it is a container for tens or hundreds of working fluid letters, equipped with an autonomous supply of compressed air

under the liquid layer through pipeline 2, manual throttle 3 and shut-off valve 4. Pressure is released through pipeline 5, shut-off valve 7, pressure is locked with a pressure gauge b, the chamber is charged through loading hatch B, the remaining liquid is drained through a closed drain hole screw plug 9.

The weakly air-saturated liquid is supplied from the pre-saturation chamber I through a pipe 10 to the wave mixing chamber II connected to the chamber I.

The wave mixing chamber is a flowing cylindrical cavity with a rectilinear geometric axis, its end opposite planes are perpendicular to the axis of the chamber. Compressed air was supplied to the chamber by a pipe 12 through a manual control pneumatic throttle 13, a shut-off valve 14 was provided with a longitudinally rectilinear geometric axis of the chamber, and liquid was supplied to the middle zone of the chamber, equidistant from the end planes. The chamber is equipped with an inspection hole for measuring the level of the working fluid in chamber I, which is closed by a threaded plug 15 (section AA). The wave mixing chamber II serves as the second stage of the saturation of the liquid with compressed air, as well as the control element for the preliminary saturation chamber I and is in communication with the rubber pipe 16 of the mixture, designed for a pressure drop of p -0.01 MPa from the compressed air source to the mixing chamber equipped with a passage , an unregulated cylindrical pneumatic throttle like a removable washer 17 and a locking device 18. Fig. 3 shows a sequence diagram of the pressure pulse in the zone (p) of the tidal wave, and c - the calculated pressure drop Ap «0,0 $ mpn L output. Beginning of air traffic. The formation of a kinetic wave, sun - wave pressure drop in the zone (P) ac - pressure drop in the tank - supply of the hydraulic component. The formation of a hydraulic wave. (C- is the formation of the resonant wave. The wave pressure rise in the zone (P). The end of the hydraulic component supply. JpCl is the moan of the camera. The air flow is stopped. The kinetic wave is attenuated. C fy is the attenuation of the resonant wave, the wave / pressure drop the beginning of the movement of the air flow, the formation of a kinetic wave, by selection, into the line of the aerosol mixture, Fig. 4 shows a wave mixing chamber II with geometric dimensions in relation to the length of the working hydraulic wave and the beam involved Yesterday, before the start of the operation, the reservoir I is filled 2/3 of the volume with paint, the loading hatch 8, the shut-off valves 4,7,14,18 are closed. By opening the shut-off valve 14 (input signal), the system enters the pre-start state. pressure 0.6 MPa through a shut-off valve 14, through a manual regulating air regulator 13, always open with a set flow area, fills the pipeline 12. Mixing chamber II, syesi line 16, the dome space of the tank I- are filled with compressed air through a paint layer: the pressure gauge records a pressure of 0.06 MPa. &

The system is in a state of equilibrium (point a, the sequence diagram of FIG. 3). In the volume of the apparatus filled with compressed air, the main pneumatic wave I (Fig. 4) of length “----, where c is the speed of the sound wave in the air, / 0 the frequency of the periods of sound water specified by the turbocompressor acts through the open fittings. and her overtones, in particular her mock 1st 1st overtone 2

(FIG. 4) with a wavelength of 71 4 4g-per}. . The device is in operation

is introduced by opening the shut-off valve 4 and the shut-off device 18, the mixture output line. The dome space of the tank I / through an open shut-off valve 4 and always open with a set cross-section, a manual control pneumatic throttle 3 is connected to the compressed air line. When the shut-off device 18 (output signal) is opened, the system adjusts its output to the atmosphere, as a result of which the pressure difference mixing chamber II, in the zone P p "0.01 MPa) AB - (Fig.Z). The differential pressure in the system causes movement; motion excites a physical kinetic wave. Having a transmitted kinetic wave, the camera becomes a generator of natural vibrations with a wavelength,

equal to twice the length of the chamber /) - ЈС where Ufizicheskaya, adjustable (input-ode signal) air flow velocity, automatically set pulsation frequency of the chamber generator (for the proposed heavy system 1 10 //) and lying in shape -6 (i№ Л at where the wave node is located in the middle part of the chamber, equidistant from the end reflective planes, which determines the wave drop

v Z & "pressure -vc (figZ) at point P of the privateer. The reservoir I, using the physical pressure drop - AB (Fig. 3) and 0.01 MPa and the wave pressure - all the pressure, delivers, losing its own pressure - x b (fcg.Z) through line 10 to caper II to zone P hydraulic component. Having assessed the habitat zone no more rigid, the main pneumatic water acquires a significantly greater speed and intensity changes the wavelength and becomes the main working hydraulic wave 3 (Fig. 4) with a wavelength of JlVе where is the speed of the sound wave in water, /,. - the frequency of the periods of the sound wave specified by the turbocompressor. The main hydraulic wave has overtones, in particular I and overtone 4 (FIG. 4) with an aqueous length of s38-tЈ- at s and the 11th overtone 5 (FIG. 4) with a wavelength of // 4 / i. In connection with the fact that the ratio of the speed of a sound wave from one source in water to the speed of the same wave in air is / - 4, then A.. This wave equality causes significant interference of the main pneumatic and Hth Burton hydraulic waves and their interaction in acute resonance. An energetically powerful wave of the 11th overtone hydraulic, having a frequency of periods // Ch-4ffit swings the wave system to the parameters of the lower limit of the high frequency, the resonance of the wave system causes high-frequency vibration of the medium and the physical effect determined by the technical effect of the utility model. The resonant wave 7 that arose during the resonance of a beam of water leads to (Fig. 4)

causes a rise in pressure (Fig.Z) s zone of the Pn chamber, the quenching of the kinetic water - fitf stop pulse of a privateer.

In this section, the high-frequency vibration crushes the hydraulic component in a hurry with the air, the mixture approaches the gas component in its properties, the hydraulic water loses its water support and intensity, the resonant wave attenuates, the wave pressure drops and ff, the air motion pulsed, the caper pulsation, the formation of the kinetic wave . Since the high-frequency sound wave did not burn substances, the whole resonance energy of the sound wave beam is spent on creating high-frequency vibration, crushing and mixing the medium. The kinetic water generator of the chamber, having a low frequency, does not have the energy of high-frequency resonance, therefore it cannot split and mix the substance, but using the kinetic energy of the wave motion it can mix the substance and, thereby, working in antiphase with a resonant sound wave, ventilates the chamber.

Compiled by / A. V. Kruglova

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Claims (1)

A chamber mixer for heavy aerosol water mixtures containing a paint tank, to which a compressed air supply pipe is connected, a mixing chamber, a liquid supply pipe to the chamber and a mixture discharge pipe, characterized in that the cylindrical wave mixing chamber is hollow, its opposite end planes are perpendicular to rectilinear geometric axis of the chamber, the length of the chamber along its geometric axis is equal to the length of the hydraulic half-wave of the apparatus, compressed air is supplied through the longitudinal axis of the geometric axis of the chamber is longitudinal; the fluid was supplied into the chamber by a pipeline into the zone of intersection of the axis of the pipeline with the geometric axis of the chamber at a quarter of the length of the hydraulic wave equidistant from the end reflective planes.