SU1578251A1 - Device for protection of water surface from ice formation - Google Patents

Abstract

The invention relates to hydraulic structures to maintain the water area in proper condition. The purpose of the invention is to increase the efficiency of the device and improve its performance. The device contains a compressor-heater connected through a distribution manifold and flexible elastic hoses with floating mats 4. Each mat 4 is provided with a gas collector 6 with openings 7 along the perimeter. The collector 6 communicates with the cavity of the mat 4 through a controlled pneumatic valve 9. With increasing pressure in the cavity of the mat 4, the pneumatic valve 9 opens and air exits through the openings 7 of the collector 6, aerating the water. The resultant power impulses at the air outlet through the openings 7 are directed in the direction opposite to the direction of the elastic force of the hose, therefore, with periodic air releases, each mat 4 performs periodic reciprocating movements, providing a mechanical effect on the water. 2 Il.

Description

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(21) 4437078 / 31-15

(22) 06/08/88

(46) 07.15.90. Bul No. 26

(71) Pskov branch of the Leningrad Polytechnic Institute named after MI Kalinin

(72) V.D.Glebov, A.M.Vetlitsyn, V.V.Mironchuk and V.M.Ivanova

(53) 627.7 (088.8)

(56) USSR Author's Certificate No. 1048040, cl. E 02 B 15/02, 1982.

(54) DEVICE TO PROTECT WATER SURFACE FROM ICE FORMATION

(57) The invention relates to hydraulic structures to maintain the water area in proper condition. The purpose of the invention is to increase the efficiency of the device and improve its performance. The device contains a compressor-heater connected through a distribution manifold and flexible elastic hoses with floating mats 4. Each mat 4 is provided with a gas collector 6 with openings 7 along the perimeter. The collector 6 communicates with the cavity of the mat 4 through a controlled pneumatic valve 9. With increasing pressure in the cavity of the mat 4, the pneumatic valve 9 opens and air exits through the openings 7 of the collector 6, aerating the water. The resultant power impulses at the air outlet through the openings 7 are directed in the direction opposite to the direction of the elastic force of the hose; therefore, with periodic air releases, each mat 4 performs periodic reciprocating movements, providing a mechanical effect on the water. 2 Il.

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FIG. 2

The invention relates to hydraulic structures, namely, devices for protecting the surface of open reservoirs from ice formation, and can be used in washing up dams, dams and other earthworks.

The purpose of the invention is to increase the efficiency of the device and improve its performance.

1 shows a device for protecting a water surface from ice formation, a general view; FIG. 2 shows a gas carrier with a gas collector and a wiring diagram.

The device for protection of the water surface from ice formation contains a compressor-heater 1 connected to the distribution manifold 2, by means of flexible elastic connections 3, heat-transfer mats 4 are attached by means of flexible elastic connections 3. Flexible elastic connections 3 can be made, for example, in the form of flexible elastic hoses, connecting the mats 4 with the distribution manifold 2 through the unions 5 of the cavity. The flexible elastic connections are made in such a way that by the force of their elasticity the unions pull the mats away from the distributor collector 2 (according to arrow A). Each mat is equipped with a gas collector 6, made in the form of a ring-shaped closed tubular frame with holes 7 around the perimeter. Gas manifold 6 is communicated by pneumatic line 8 through pneumatic valve 9 and fitting 5 with a cavity of mat 4. Pneumatic valve 9 is made with a spring-loaded spool, and its pneumatic control chamber 10 is in communication with receiver 11 and through an adjustable choke 12 with a cavity of mat 4.

The device operates as follows.

In the initial position (Fig. 1), the pre-inflated heat transfer mats 4 are placed on the water surface and connected by flexible elastic hoses to the distribution manifold 2. The elastic connections 3 are separated from the distribution manifold 2 (arrow A). Pneumatic valve 9 is closed.

When fed to the gas manifold 2 heated compressed air, entering through the hoses 3 into the cavity of each mat 4, increasing the pressure in it. At the same time, pressure increases in

the receiver 11 and in the control chamber 10 of the pneumatic valve 9, which communicate with the cavity through the throttle 12. With increasing pressure to a predetermined value, the pneumatic valve 9 opens and reports the cavity of the mat 4 with the gas manifold 6.

The air from the cavity of the mat 4 begins to flow into the water through the openings 7 of the gas manifold 6. The bore area of the pipeline 8 and the diameters of the openings 7 in the collector 6 are set so that air escapes through all the openings. The cross-sectional area of the through passage of the hoses 3 is smaller than the cross-sectional area of the throughput aperture of the pneumatic line 8 and pneumatic valve 9. When the pneumatic valve Qana 9 opens, the air flow rate from the cavity of the mat 4 to the collector 6 is greater than that from the compressor-calorific unit. The air outlet through the manifold 6 decreases the pressure in the cavity of the mat 4, therefore after a certain period of time the pressure in the control chamber 10 is also reduced and the pneumatic valve 9 is closed by a spring. The duration of the pulses of the airflow output-Q is set using adjustable throttles 12 in accordance with the operating conditions (ambient temperature). After increasing the pressure in the cavity of the mat 4, the discharge cycle is repeated. Air out through all the openings 7 of the gas manifold 6 provides an intensive aeration effect on the water. The holes 7 in the gas manifold 6 are located around the perimeter so that the resultant power pulses are directed in the direction opposite to the direction of the elastic force of the flexible link 3 5 (corresponds to arrow B in Fig. 1) when air is released from the holes. Therefore, when the air leaves, the mat 4 under the action of the resultant resultant power pulses moves towards the distribution manifold 2, Q (along arrow B), overcoming the elastic force of the elastic connection 3. After the termination of the air output, the mat 4 returns to initial position. Such periodic movements of each mat, 4 provide a high intensity of mechanical action, mixing the mat on the water. The efficiency of the mechanical action increases

due to the water-jet properties that arise when air displaces water from the gas manifold 6 through the openings 7.

i

Thus, the improvement of the efficiency and performance of the proposed device is achieved due to the intensification of aeration and mechanical effects on the surface of the water. The intensity of the aeration effect is increased by supplying the device with a gas manifold connected to the mat cavity through a controlled pneumatic valve. Air enters the water through all the holes located around the perimeter of the collector.

The intensity of the mechanical action is increased due to the periodic displacements of the mat due to its elastic coupling with the distribution manifold and the predetermined direction of the resultant power pulses when air passes through the gas collector holes of each mat.

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Claims (1)

Invention Formula A device for protecting the water surface from ice formation, comprising hollow floating mats with pneumatic distributors and a compressor calorifer installation connected to the mats via a distribution manifold and flexible hoses, in order to improve the efficiency of the device and improve its operational qualities, each mat is supplied with a tubular annular manifold placed along the perimeter of the mat with an adjustable throttle, receiver and pneumatic loudspeakers, the pneumatic distributor is equipped with a chamber connected 0 pneumatic lines with a receiver and through an adjustable choke - with a mat cavity, and you have a pneumatic distributor. fuller two-piece and connected by pnevmoline with pop mat and 5 with an annular manifold, whereby the flexible hoses are made elastic, and in the outer wall of the tubular collector on the side opposite to the elastic hose, holes are made. Rie.1