RU2340836C1 - Automatic air damping system - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: system is comprised of pneumatic injectors, pipeline network intended for supplying water and compressed air, and control unit for pneumatic injectors' operation control. Besides, it is additionally includes membrane packless valve with electromagnetic control acting also as downstream pressure controller being actuator in air humidity control diagram. System also includes filter and automatics including humidity sensor with controller, while membrane packless valve contains coil and auxiliary valve connected with the main valve by means of membrane unit. Injectors are represented with acoustic injectors. Each injector contains housing with acoustic generator within US frequency in the shape of nozzle and circular volume vibrator.

EFFECT: increase of pneumatic water spraying effectiveness and reliability.

2 cl, 3 dwg

Description

The invention relates to techniques for air conditioning and can be used to create comfortable microclimate conditions in industrial premises, in particular as local dampening systems.

The closest technical solution to the claimed object is a system according to the patent of the Russian Federation No. 2067730, class. F24F 3/06 of 10/10/96 containing a spray gun and a control unit.

Its disadvantage is the relatively low efficiency of the pneumatic spraying process.

The technical result is an increase in the efficiency and reliability of the process of pneumatic spraying of water.

This is achieved by the fact that in the system of automatic humidification of air, consisting of pneumatic nozzles, piping networks used to supply water and compressed air to them, and a control unit for pneumatic nozzles, moreover, it additionally includes a membrane sealless valve with electromagnetic control, which simultaneously plays the role of “after yourself” pressure regulator and which is the actuator in the air humidity control circuit, as well as a filter and an automation system including a humid sensor with a regulator, and a diaphragm sealless valve with electromagnetic control contains a coil and an auxiliary valve connected to the main one through the membrane unit, and the electro-pneumatic pressure regulator is made with the following size ratios of its main elements, which are in the optimal range of values: H / D = 1, 3 ... 1,5, where N is the height of the pressure regulator housing assembly, D is the diameter of the membrane assembly, nozzles are made in the form of acoustic nozzles, each of which contains a housing with three generators of sound vibrations of the ultrasonic frequency range in the form of a nozzle and an annular volume resonator, the case being made in the form of a vertically arranged cylindrical sleeve, in the upper part of which there is a tube for supplying air, and perpendicular to its axis there is a tube for supplying liquid, inside the case it is rigidly aligned a sleeve with upper and lower flanges is fixed, and the lower flange is rigidly fixed in a groove made in the housing, an annular volumetric coaxially located inside the sleeve the resonator is made in the form of a cup with a conical surface, and the cup is pressed onto the rod with a diameter d of the resonator, and in its rear part there are fixing discs made in the form of elastic petals interacting with the inner surface of the sleeve, and at least located in the lower flange one nozzle at an angle to the axis of the resonator, the value of which lies in the following range of values: 20–40 °, while the continuation of the axis of the nozzle lies on a circle located in the middle of the conical surface of the resonator.

Figure 1 presents the control unit for the operation of pneumatic nozzles, figure 2 is a frontal section of an electro-pneumatic pressure regulator of the humidification system, figure 3 is a General view of a pneumatic acoustic nozzle.

The automatic humidification system is designed to supply water directly from the network for cases when the water pressure in the system is not enough to supply it to the supply tank, which is under overpressure. The system of automatic humidification contains a diaphragm sealless valve with electromagnetic control (figure 2), which at the same time acts as a pressure regulator "after itself" and is an actuator in the air humidity control circuit.

The automatic control circuit of the humidification installation shown in Fig. 1 consists of water pipelines 1 and compressed air 2, acoustic pneumatic nozzles (Fig. 3), a pressure regulator 4, a filter 3, and an automation system. Compressed air, cleaned of oil and dust, is supplied to the nozzles, as well as through an additional filter 3 Ф-2, to the upper part of the electro-pneumatic pressure regulator 4 of the electronic pressure regulator (FIG. 2). Water from the water supply enters the lower part of the pressure regulator 4 and can only reach the humidifying nozzles if there is pressure in the upper part of the regulator that is sufficient to open the valve to supply water through the pressure reducer. The electro-pneumatic pressure regulator is made with the following size ratios of its main elements, which is in the optimal range of values: H / D = 1.3 ... 1.5, where N is the height of the pressure regulator housing assembly, D is the diameter of the membrane unit.

The acoustic nozzle (figure 3) for spraying liquids comprises a housing 10 with an ultrasonic frequency range sound generator located in the form of a nozzle 12 and an annular volume resonator 14. The housing 10 is made in the form of a vertically arranged cylindrical sleeve, in the upper part of which there is a tube 16 for air supply, and perpendicular to its axis is a tube 17 for supplying fluid. Inside the housing 10, a sleeve 23 is rigidly fixed coaxially with the upper 11 and lower 15 flanges, and the lower flange 15 is rigidly fixed in the groove made in the housing 10.

Inside the sleeve 23, an annular volume resonator 14 is arranged coaxially with it, made in the form of a cup 18 with a conical surface 20. The cup 18 is pressed onto a rod with a diameter d of the resonator 14, and fixing discs 21 and 22 made in the form of elastic petals are located in its tail part 13 interacting with the inner surface of the sleeve 23. At least one nozzle 19 is located in the lower flange 15 at an angle to the axis of the resonator 14, the value of which lies in the following range of values: 20 ÷ 40 °, and the continuation of the axis of the nozzle 19 lies on a circle, finding eysya in the middle part of the conical surface 20. The inner surface of the sleeve 23 are coaxial conical 24 and cylindrical 25 opening.

For optimal operation of the nozzle, the following ratios of its parameters must be observed.

The ratio of the height h _{1 of the} annular cavity resonator 14 to the distance h between the upper base of the conical surface 20 and the lower end surface of the housing 10 lies in the optimal range of values: h ₁ / h = 1 ÷ 3.

The ratio of the inner diameter d _{1 of the} cup 18 of the resonator 14 to the diameter d _{2 of} its outer cylindrical surface lies in the optimal range of values: d ₁ / d ₂ = 0.7 ÷ 0.9.

The ratio of the inner diameter d _{1 of the} cup 18 of the resonator 14 to the diameter d _{2 of} its rod lies in the optimal range of values: d ₁ / d ₂ = 0.7 ÷ 0.9.

The ratio of the inner diameter d _{1 of the} cup 18 of the resonator 14 to the height h _{1 of the} annular volume resonator 14 lies in the optimal range of values: d ₁ / h ₂ = 1 ÷ 2.

The system of automatic humidification works as follows.

If the pressures of compressed air (above the membrane) and water (under the membrane) are equal, the opening of the valve 1 passing water to the nozzles stops. Thus, a constant water pressure with very small fluctuations, not exceeding the pressure of compressed air, is maintained behind the valve and at the nozzles. When the pressure of compressed air decreases, the regulator valve is released and reduces the flow of water to the nozzles.

The acoustic nozzle for spraying liquids works as follows.

A spraying agent, for example air, is supplied through a tube 16, where it encounters an annular volume resonator 14. In the latter, as a result of the passage of the resonator 14 by a spraying agent (for example, air), pressure pulsations arise in the latter, creating acoustic vibrations, the frequency of which depends on the parameters of the resonator. The acoustic vibrations of the spraying agent contribute to a finer atomization of the liquid supplied through the tube 17 to the nozzles 19, from where it enters the circle located in the middle of the conical surface 20 of the resonator 14, then crushes under the influence of acoustic air vibrations into small droplets, resulting in a torch sprayed solution with air, the root angle of which is determined by the angle of inclination of the conical surface 20 of the resonator 14.

The acoustic nozzles used for gas purification of exhaust air consume 0.6 ... 0.8 m ³ / min of compressed air and 1.5 ... 2.2 l / min of water. The water torch they create allows them to be installed in ducts with a diameter of up to 600 mm. Lower working pressures of media: water - 1.5 atm; compressed air 1.5 ... 2 atm (0.15 ... 0.2 MPa).

When the supply of compressed air stops, the flow of water to the nozzles is completely stopped. In the regulation scheme of the humidification system (Fig. 1), in addition to the ESWD, there is a 5 EHF humidity sensor with regulator 6 SPR-104. The controller sensor is installed at a characteristic point in the workshop. When the air humidity is above a predetermined value, the SPR-104 regulator gives a command pulse to the coil 7 of the EPRD controller (Fig. 2), the auxiliary valve 8 opens, and the space above the membrane communicates with the atmosphere, which is connected to the main 9 through a membrane unit consisting of cavities A and B.

The air pressure in this space drops, the valve 9 closes and reduces the access of water to the nozzles.

When the air humidity is lower than the specified regulator 6 SPR-104 removes power from the coil 7 of the EPPR regulator, the pressure above the valve membrane begins to increase. Valve 9 opens and the nozzles start working again.

The electronic throttle control regulator 4 is mounted at any height available for maintenance, but always below the nozzle plume level. This height determines the air pressure above the membrane, which usually does not exceed 2 ... 3 N / cm ² . Pressure control is carried out by a manometer on the water line after the valve. The pressure of the compressed air supplied to the nozzles should not exceed 10 ... 11 N / cm ² (1.0 ... 1.1 atm).

Claims (2)

1. The system of automatic humidification of air, consisting of pneumatic nozzles, piping networks used to supply water and compressed air to them, and a control unit for the operation of pneumatic nozzles, and it additionally includes a diaphragm sealless valve with electromagnetic control, simultaneously acting as a pressure regulator “after itself ”and which is the actuator in the air humidity control circuit, as well as a filter and an automation system, including a humidity sensor with a regulator, and a meme the wound glandless valve with electromagnetic control contains a coil and an auxiliary valve connected to the main one through a membrane unit, and the electro-pneumatic pressure regulator is made with the following size ratios of its main elements, which are in the optimal range of values: H / D = 1.3 ... 1 ,5; where H is the height of the pressure regulator housing assembly, D is the diameter of the membrane assembly, characterized in that the nozzles are made in the form of acoustic nozzles, each of which contains a housing with an ultrasonic frequency range sound generator in the form of a nozzle and an annular volume resonator, the housing is made in the form of a vertically arranged cylindrical sleeve, in the upper part of which there is a tube for supplying air, and perpendicular to its axis there is a tube for supplying liquid, inside of the housing coaxially with it, a sleeve with upper and lower flanges is rigidly fixed, and the lower flange is rigidly fixed in the groove made in the housing, inside the sleeve coaxially located is an annular volume resonator made in the form of a cup with a conical surface, and the cup is pressed onto a rod with a diameter of the resonator, and in its rear part there are fixing discs made in the form of elastic petals interacting with the inner surface of the sleeve, and at least one nozzle is located in the lower flange at an angle to and the resonator, the value of which lies in the following range of values: 20 ÷ 40 °, while the continuation of the axis of the nozzle lies on a circle located in the middle of the conical surface of the resonator. 2. The automatic air humidification system according to claim 1, characterized in that in the nozzle the ratio of the height h _{1 of the} annular volume resonator to the distance h between the upper base of the conical surface and the lower end surface of the housing lies in the optimal range of values: h ₁ / h = 1 ÷ 3; the ratio of the inner diameter d _{1 of the} resonator cup to the diameter d _{2 of} its outer cylindrical surface lies in the optimal range of values: d ₁ / d ₂ = 0.7 ÷ 0.9; the ratio of the inner diameter d _{1 of the} resonator cup to the diameter d of its rod lies in the optimal range of values: d ₁ / d = 1 ÷ 3; the ratio of the inner diameter d _{1 of the} resonator cup to the height h _{1 of the} annular volume resonator lies in the optimal range of values: d ₁ / h ₁ = 1 ÷ 2.

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