SU1739112A1 - Seal flange joint - Google Patents

Abstract

Use: for connecting pipelines by means of flanges. The essence of the invention is to expand the functionality of the sealed flange connections by providing uncoupling of the flanges without depressurization of the joint. In this case, means are used to increase the degree of sealing against the initial tightness of the joint. Such means are - a rim of elasticity of the material, covering the outer cylindrical surfaces of the flanges, fixed with a tight collar, sealing sleeves with tightening bolts, made of elastic material with closed pores, an annular elastic cord, sealing cord, sealing the mutually inverted flange surfaces. The expansion of the flanges is ensured by supplying the pressure of the medium from an external source through channels made in fastening flange bolts into which the release screws are articulated with expansion spacers securing a given amount of expansion of the flanges. 3 з п. Ф-лы, 1 silt, (Л С

Description

Sealed connection of flanges with threaded fasteners in the form of bolts installed in coaxial holes and means for sealing the joint, including an elastic gasket placed in an annular gap between mutually facing surfaces of the flanges on their inner diameter.

The proposed device contains elastic rims 1, clamped clamp 2, of elastic material with closed pores near-bottom washers 3, annular elastic cord mounting bolts 5 with fitting 6 and channel 7, expansion nut 8 coupled to the thread of the bolt 5, with a tapered shank release screw 9 and with him

an articulated spacer 10 placed in the channel of the bolt 5, a pipe 11 is connected to the fitting 6 of the bolt 5 for supplying a pressurized medium to the interflange gap from an external source.

The tight connection of the flanges is characterized by the following initial position. The elastic rim 1 with tension encompasses the outer cylindrical surfaces of the flanges, which is tightly fastened with a tight clamp 2. The fastening bolts seal the washers 3 of elastic material with closed pores including the three bolts from the external pressure source pipe 11

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An annular cord 4 of elastic material is installed in a bore made in flanges around the perimeter of an elastic gasket placed in an annular gap between the flange surfaces, on the side of their internal diameter.

The release screw 9 and the spacer 10 are articulated with the bolt 5 in a free state.

The pressure of the medium from an external source through the tube 11 through the nozzle 6 and the channel 7 of the bolt 5 is supplied to the interflange gap; under pressure in the specified gap, the sealing structural elements of an elastic material provide sealing of the flange joint. With the starting position with the supply of pressure from an external source, the flanges are expanded.

As the flanges are released by the squeezing screw 9, the spacer 10 is displaced and, when the set value is reached, the pressure is fixed by the spacer 10. other fittings and fittings installed in engineering communications. In addition, the functional possibilities of the NOSI and hermetic joining of the flanges are extended, in particular, to Control pressing of engineering communications during their operation. For this, the expansion of the flanges is brought to a state in which the annular elastic cord 4 loses its self-sealing properties, and the applied pressure will propagate through the unsealed elastic gasket to the test pressure-tested section of engineering communications. With such a functional purpose of the proposed device, the annular elastic cord 4 is laid down taking into account its depressurizing properties at threshold deformations.

Claims (4)

1. Hermetic flange connection containing threaded fasteners installed in coaxial holes of the flanges elements in the form of bolts with nuts and means for sealing the joint, including those placed in the annular gap between mutually reversed flange surfaces on the side of their internal diameter Elastic gasket, characterized in that, in order to extend the functionality by providing expansion of the flanges without depressurization of the joint, sealing means are additionally are provided with an elastic rim enclosing the outer cylindrical surfaces of the flanges, mounted on the last with a tension straps, elastic washers located between the supporting fastener surfaces and mating surfaces of the respective flanges and an annular elastic cord installed in a bore formed in the flanges around the perimeter of the aforementioned elastic gaskets, wherein at least one of the fastening bolts is provided with a channel connected to the pressure source for supplying a pressurized medium to the joint zone. 2.Connection pop, 1, about tl and ch and ya ee- so that the bolt is made with the channel for supplying the medium, from the side of the second end is made with an axially deaf threaded hole, mating with a radial through hole made in said bolt, the axis of which is located in the plane of flange butt, with a squeezing screw with a tapered shank located in said axial hole, and in radial - expansion One of its ends is in contact with the tapered shank of the screw. 3. Connection on PP. 1 and 2, about tl and h a torn, e e with the fact that uniformly around the circumference There are three bolts with flanges for supplying the medium and holes for squeezing bolts and squeezers. 4. Connection on PP. 1-3, characterized in that said elastic washers made of elastic material with closed pairs. /// /// ///} h /// ////////////////// / S 11  ///// SffS 7  // s / ss / s / ss / / / / / 13