RU2206814C2 - Device for liquidation of leakages - Google Patents

Abstract

FIELD: construction, applicable in repair pipe-lines and vessels. SUBSTANCE: a terminal groove accommodating on elastic sealing member is made in the cylindrical hollow body with ears and valve. The cylindrical body with an open valve is installed on the defective section of the pipe-line and secured on it by links attached to the ears. The valve is closed and the medium from the pipe-line through the defect is fed to the body cavity, pressing the seal thus improving the sealing. The defect area gets unloaded from the inner pressure, which prevents growth of the defect. EFFECT: eliminated growth of the defect at liquidation of leakage of product from a pressurized vessel. 1 dwg

Description

 The invention relates to techniques for repairing trunk pipelines and vessels under pressure, and is intended to eliminate product leaks resulting from the formation of cracks and other defects in pipes or vessels.

 A device for eliminating fistulas in pipelines is known, including a supporting element consisting of plane-parallel plates of magnetic cores and permanent magnets, and an elastic seal with a multi-screw clamp mechanism (see ed. Certificate of the USSR 983374, class F 16 L 55/18, 1982). This device is equipped with a housing located in the cavity of the carrier element, mounted with the possibility of angular movement relative to the carrier element. A diametrical groove for the thrust seal is made on the inner end of the housing.

 A device for eliminating leaks is known, comprising two coupling halves with a seal and a delivery mechanism made in the form of a power cylinder mounted on one of the coupling halves with a closed hydraulic cavity and a replaceable chamber having a membrane forming a cavity filled with glue, a discharge and exhaust valves installed in the cylinder cavity (see ed. certificate of the USSR 1576770, class F 16 L 55/18, 1990).

 However, the known device is difficult to manufacture and operation. When using them, the possibility of further development of the defect at the repair site, as the vessel or conduit is under pressure.

 Closest to the claimed invention is a device for eliminating a leak in the pipeline (see ed. Certificate. USSR 1516713, class F 16 L 55/18, 1989), consisting of a screw tension mechanism, on the lead screw of which the thrust block is pivotally mounted and a plate is mounted a nut with which the ends of the gripping element are kinematically connected with an elastic sealing gasket. The plate nut and the thrust block are interconnected by means of two double-arm levers symmetrically positioned relative to the lead screw with clamps mounted on the hinge axles for fastening the ends of the gripping element.

 The disadvantage of this method is the incomplete sealing of the defect area and the possibility of further growth of the defect, because the defect zone is loaded with internal pressure.

 EFFECT: elimination of the possibility of defect growth during elimination of product leakage from the vessel.

 The specified technical result in the implementation of the invention is achieved by the fact that in the known device for eliminating leaks, having a tension mechanism for fastening the sealing unit. According to the invention, the sealing assembly is made in the form of a cylindrical body equipped with a valve for relieving pressure, brackets for installing the tensioning mechanism and a trapezoidal elastic sealing element placed by means of a spring inside the housing, on the inner surface of which in the lower part at the base there is a diametrical groove for the sealing element and annular conical recess.

 When using the claimed invention, the growth of the defect in the vessel wall is prevented by unloading the defect zone from the influence of the pressure of the medium in the vessel. An elastic trapezoidal seal, fixed inside the device’s body using springs and a protrusion formed on one side by a diametrical groove, and on the other, by an annular conical recess made on the inner surface of the body, allows the device to be installed on the surface of the vessel in the defect zone without a gap. In this case, the pressure of the medium in the vessel and inside the device is equalized due to a partial discharge through the defective section of the vessel. As a result, the device is self-sealing, and the defect zone is unloaded.

 The analysis of the prior art by the applicant, including the search and identification of sources containing information about analogues of the claimed invention, made it possible to establish compliance with the latter patentability criterion of "novelty", as the applicant did not find an analogue characterized by features identical to all the essential features of the claimed device, and with respect to the prototype, as the closest analogue, revealed a set of essential for perceived by the applicant technical result distinctive features in the claimed decision set forth in the claims.

 Since the prior art determined by the applicant has not revealed the effect of the transformations provided for by the essential features of the claimed invention on the achievement of a technical result, the invention meets the criterion of "inventive step".

 The invention is illustrated in the drawing, which shows a General view of a device for eliminating leaks.

 The device comprises a tension mechanism and a sealing assembly. The sealing unit has a cylindrical body 1, on which a valve 2 is installed to relieve pressure and eyelets 3 are placed for fastening the rods 4 of the tension mechanism. Inside the housing 1 is placed an elastic sealing element 5 having a trapezoidal shape. Under the sealing element 5 on the inner surface of the housing 1 in the lower part at the base there is made a diametrical groove 6 and an annular conical recess 7, forming a protrusion 8, by means of which, as well as by means of springs 9, the sealing element 5 is fixed in the housing of the device.

 The work is as follows. The device using rods 4 connected through tension couplings with a flexible element (not shown) covering the vessel 10, is installed on the defective section 11 so that the defect is in the center of the contact line of the vessel surface with the device. When installing the device, valve 2 is in the open state. The medium located in the vessel under excessive pressure through the defective fistula 11 enters the housing 1 and then through the valve 2 into the atmosphere. After the device is installed and secured using a tensioning mechanism on the vessel 10, the valve 2 closes. The medium penetrating from the vessel into the housing 1 creates a pressure equal to the pressure in the vessel, thereby the seal 5 is pressed against the surface of the vessel 10. The gap between the housing 1 and the surface of the vessel 10 with the defect 11 is completely sealed, the leakage of the medium from the vessel into the atmosphere is completely stopped. The defect zone is unloaded from internal pressure, which eliminates the growth of the defect. Given the preservation of the tightness between the surface of the vessel and the device, it is possible to select in small quantities the contents of the vessel 10 through the valve 2.

Claims (1)

 A device for eliminating leaks, having a tension mechanism for fastening the sealing assembly, characterized in that the sealing assembly is made in the form of a cylindrical body equipped with a pressure relief valve, eyelets for installing the tensioning mechanism and a trapezoidal elastic sealing element placed by means of springs inside the housing on the inside the surface of which in the lower part at the base is made a diametrical groove and an annular conical recess.