SU857369A1 - Device for ensuring floating hull of dredge - Google Patents

Description

(54) DEVICE FOR ENSURING REPAIR OF PONTHON DRAGA TO SWIMMING

one

The invention relates to mining operations, in which Yiwu., Use structures for collecting and transporting soil, installed on floating bases, in particular, dredges for developing gold-bearing and diamond-bearing placers.

There is a known method of providing repair work for the suction dredger body, which allows to create a working ice chamber in the area of the defective place 1 by means of freezing works.

The disadvantages of such a frost chamber are a long period of time for its formation due to the natural layer-by-layer freezing and removal of the formed ice, as well as low reliability and the lack of a guarantee of safety during its use. In addition, the creation of such a camera is possible only in a period of significantly low temperatures in areas with stable winter.

Closest to the proposed technical entity is a device for repairing individual parts of the suction shells, which includes a camera with a housing and seals. The pre-timber chest is loaded with ballast, put under the bottom of the hull, then the ballast is gradually unloaded. By virtue of its buoyancy, the unloaded chest is pressed against the bottom of the hull, after which water is pumped out of it 2.

The disadvantages of this device include the fact that the use of a wooden (floating) cage is possible only with the elimination of defects in the bottom of the pontoon, but in practice the use of drags most often leaks occur in the vertical walls.

ig of the stern and frame slit of the pontoon. The purpose of the invention is to eliminate these disadvantages, increasing the reliability of repair work.

This goal is achieved by the fact that the sides of the chamber are equipped with freezing cops with the possibility of connecting them to a mobile refrigeration unit.

Moreover, on the inside of the pontoon along the contour of the chamber adjoining it, additional freezing elements are located.

On fng. 1 shows the aft part of the pontoon dredge with a camera for repair, a slit; in fig. 2 - the same plan view.

The device consists of a metal chamber 3 mounted on the stern of the pontoon 1 in the area of the defective bridge (holes). On the upper part of chamber 3 there are strut-like brackets 4 and 5, with the help of which it is hung on the channels 6 and 7 mounted on the upper part of the pontoon 1 , and fastened on them with screw clips 8 and 9.

On the sides of the open part of the chamber 3, adjacent to the pontoon 1, freezing elements 10 are fixed, and on the inner side of the pontoon 1, additional freezing elements 11 fixed by means of brackets 12 and 13 on channels 6 and 7 are installed along the contour of the sides of chamber 3. Freezing elements 10 and 11 allow a mobile refrigeration unit of a typical construction (not shown) to be connected to them. In this case, additional elements 11 are put into operation in the case of a relatively high ambient temperature to increase the intensification of freezing.

The device works as follows.

After connecting the freezing elements 10 and 11 to the refrigeration unit, they are put into operation, as a result of which between the wall of the pontoon 1 and the adjacent freezing elements 10 the ice layer is frozen, forming the necessary seal created by the hermetic connection of the chamber 3 with the pontoon 1. After that, the chamber 3 is pumped out water and it becomes ready for repair work on the elimination of the hole 2. In this process, the cooling unit with elements 10 and 11 can continue to work depending on the temperature environment.

The use of the invention on drags will allow in emergency situations associated with

with the occurrence in the pontoon dredge defects (holes, cracks, etc.), quickly, in a relatively short time, to discourage the repair of the pontoon afloat by creating in the defective area of the pontoon repair chamber with freezing elements along the sides adjacent to pontoon and freezing a layer of ice along the contour of the abutment, creating a sealed chamber connection

with a pontoon. This will reduce downtime drag and improve reliability and safety to ensure the repair work of the pontoon afloat. In addition, the proposed device can be used on other technical installations installed on a floating basis, requiring periodic repairs afloat.

Claims (2)

1. A device for providing afloat pontoon repair, comprising a chamber with a hull and a seal, characterized in that, in order to improve the reliability of repairs, the sides of the chamber are provided freezing elements with the possibility of their connection to a mobile refrigeration unit. 2. A device according to claim 1, characterized in that along the contour of the sides the chamber is provided with additional freezing elements. Sources of information taken into account in the examination 1.Shkundin B.M. Equipment of hydromechanization of earthworks. M., “Energie, 1970, p. 227. 2. In the same place 228.