RU2570314C1 - Device to prevent ice formation on water surface - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: device comprises a vertical cylindrical body with through slots. An element generating water circulation is installed in the body. The element generating water circulation is dielectrically connected in insulated manner by electric links with a current source. The element that generates water circulation is made in the form of a spiral. The spiral is placed in a holder. The holder is made in the form of a truss and is connected by means of a cable rope and a manipulating device with an actuating mechanism. The actuating mechanism is placed on a hydraulic engineering structure.

EFFECT: prevention of ice formation on water surface near the structure and on water surface.

1 dwg

Description

The invention relates to the field of operation of hydraulic structures operating in ice conditions, and is intended to prevent icing of the underwater part of structures in water bodies.

One of the factors that reduce the reliability of offshore structures in ice operating conditions is icing of structures, which leads to surface damage and deformation of structures in ice impact areas as a result of the complex corrosion and mechanical action of ice in the marine environment. Icing can exert an excess impact on the design of marine objects located on the shelf freezing, and disable these objects, creating a threat to human life and health, and lead to accidental pollution of the marine environment. A device for preventing icing of the hull, afloat, implemented in the same method, including a mechanism for creating vibrations, made in the form of two eccentrics rotating in a vertical plane at the same speed, but in opposite directions. The mechanism is located in the double bottom space of the vessel (lighter). The drive of the mechanism receives energy from the shore or tug. When the mechanism generates vertical vibrations with a frequency that is a multiple of the frequency of oscillations of the hull, the underwater part is washed with deep, warmer water, which prevents the formation of ice on the hull (copyright certificate SU No. 1244882 A1, 02/10/2002 [1]). The disadvantages of this known device are the limited claimed application (to prevent icing of the hull of a ship afloat), the presence of mechanical rotating parts, the additional effect of vertical vibrations on the hull of the ship, which adversely affects the reliability of its auxiliary mechanisms.

It is also known a device for preventing the formation of ice on a water surface containing a venture type water pump (US patent No. 4247261, 01/27/1981 [2]), which when placed in the water column supplies warm water from depth to surface, keeping the surface free of ice. The known device comprises a vertical cylindrical body, open at the top and having through slots (holes) in the lower part. In the casing there is a water circulation generating element in the form of a venture type water pump, which is dielectric insulated by electrical connections to an AC source. A disadvantage of the known device is the insufficient orientation of its action on the structure protected from ice, i.e. the impossibility of uniform removal of ice from the surface of the structure located in the water area, which may serve as an additional factor for the occurrence of its mechanical and corrosion damage. In addition, the presence in the device of rotating parts operating in an aggressive environment, which is sea water, does not provide sufficient reliability, limiting its resource.

In the known technical solution (patent RU No. 2520339, 06/20/2014 [3]), the technical problem to which the claimed invention is directed is to create a device devoid of these drawbacks, namely, preventing the formation of ice on the surface of the water near the structure, reducing the corrosion rate, increasing device reliability.

In this case, the stated technical problem is achieved by the fact that in the known device for preventing the formation of ice on the water surface, containing a vertical cylindrical body, open at the top and having through slots in the lower part, in which a water circulation generating element is placed, which is dielectricly isolated electrically connected to the source electric current, in contrast to it, in the inventive device, the water circulation generating element is installed in the lower part of the vertical th housing and formed as a pair of electrodes - a cathode and an anode. The cathode is made in the form of a metal rod, which is placed inside this vertical cylindrical body along its entire length, coaxially with some distance from the inner surface of the body. The anode is located around the rod - cathode, and is insulated dielectricly mounted on the inner surface of this housing in its lower part and slightly above the through slots. Moreover, the anode itself is made of a water-insoluble electrically conductive material, the pairs of electrodes are electrically connected to a constant current source, and the electrical connection of the anode is located inside the housing. Such a design of the device is technologically justified when the rod - the cathode - is the structural element itself, in particular the pile element of the hydraulic structure.

Such a design of the device is also technologically justified when the anode is made of platinum titanium.

Such an embodiment of the device is expedient in which the vertical cylindrical body is made of a polymeric material, in particular of soft vinyl plastic. The claimed combination of distinctive and restrictive features ensures uniform circulation of water around the cathode, in particular, the structural element of the hydraulic structure - piles, which completely prevents icing and provides, in addition, additional protection of this structural element from corrosion.

The anode is made of platinum titanium, which prevents its rapid dissolution during electrolysis, provides a duration of action and does not contribute to environmental pollution.

For the manufacture of a vertical cylindrical body, it is possible to use any polymer elastic material, in the particular case this body is made of soft vinyl plastic.

The known device [3] provides cleaning from icing of the metal structure when applying to the electrodes a constant electric current through electrical connections. Under these conditions, water circulation in the vertical direction in the volume of the gap of the cylindrical body through its slots in the lower part is created due to the release of gas bubbles generated during the electrolysis of water. In addition, the absence in the inventive device of rotating parts contributes to its long-term operation, increases its reliability.

Thus, the achievement of the technical task is achieved - preventing icing of the hydraulic structure and, in addition, protecting it from corrosion, increasing the reliability of the device.

However, the known technical solution [3] is a stationary device and its positive effect is limited by its permanent installation location. In addition, the site of the structure, subject to icing, must be placed in a vertical cylindrical body, which can not always be done, especially if there are protruding structural elements on the site subject to icing.

The objective of the proposed technical solution is to expand the functionality while preventing icing of the hydraulic structure.

The problem is solved due to the fact that in the device for preventing the formation of ice on the water surface, containing a vertical cylindrical body, open at the top and having through slots, in which a water circulation generating element is placed, which is dielectric insulated by electrical connections with an electric current source generating circulation the water element is made in the form of a spiral placed in a mandrel made in the form of a truss and connected by a cable cable and a manipulating device with ADDITIONAL mechanism placed on the waterworks.

The inventive device is illustrated by the following drawing, which shows a General view of the device.

The claimed device is illustrated by an example of a device for preventing icing of pile elements of hydraulic engineering structures. The device comprises a vertical, for example, plastic — from soft vinyl-sheet plastic sheet, a cylindrical body 1 having through slots 2, in which a water circulation generating element 3 is placed, which is dielectricly isolated electrically connected to an electric current source 4. The water circulation generating element 3 is made in the form spiral, placed in the mandrel 5, made in the form of a truss and connected by a cable-rope 6 and a manipulating device 7 with the actuator 8, placed on the hydraulic 9.

The device is used as follows.

By means of a manipulating device 7, a vertical cylindrical hull is lowered overboard the vessel or the production platform at the icing site. An electric current is supplied to the water circulation generating element 3, as a result of which the seawater in the vertical cylindrical housing 1 will be heated, for example, to a temperature of 80-90 ° C. In this case, when a current of a certain density is applied, water is electrolyzed and a gas lift effect is created, gas bubbles released in this case will capture warm water and supply it from a predetermined depth (the installation location of the water circulation generating element 3) to the water surface, along the icy surface of the iced hydraulic element structures or hulls of the vessel.

In addition, when reaching a water surface, for example, covered with ice, heated water will pour onto the ice, heating and melting it. As a result, not only a decrease in the surface part of the formation in the impact zone is possible, but also an additional appearance of the overturning (under the influence of Archimedean forces) moment, which can cause the breaking of the sea part of the ice formation.

When this method is implemented, ice formation and construction are not soldered, therefore, when the hydrometeorological conditions change, the ice formation will be able to independently leave the platform area. This method does not require destruction of the ice formation.

Claims (1)

A device for preventing the formation of ice on a water surface, comprising a vertical cylindrical body open from above and having through slots in which a water circulation generating element is placed, which is dielectric insulated by electrical connections to an electric current source, characterized in that the water circulation generating element is made in the form a spiral placed in a mandrel made in the form of a truss and connected by a cable cable and a manipulating device with an actuator, displacements at the waterworks.

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