CZ2004383A3 - Device for closing pipeline - Google Patents

Abstract

In the present invention, there is disclosed a Device for closing a pipeline consisting of a closure body (1) adapted for screwing on a valve to be repaired or a flap within a pipeline to be repaired. A steel tube (2) housing inside a pull rod (3) having at its one end inserted between two pressure disks (5) a spacing sealing cylinder (4) is inserted in an opening performed in said closure body (1) axis. Said pull rod (3) projecting from the steel tube (2) at the opposite end thereof is provided here with thread serving for screwing thereon a tightening nut (8) with a metal ring (7) placed thereunder. Both ends of the pull rod (3) are provided with end tips (6) of non-sparking material. A through threaded hole is performed in the bottom of said closure body (1). An adjusting screw (9) is screwed in said threaded hole at one end thereof, while a connecting screw (10) of a grounding system is screwed in the threaded hole at its other end. Said closure body (1) bottom is usually provided with a sealing system with a union nut (13).

Description

Pipe closing devices

Technical field

The invention relates to the construction of a device for temporary or emergency closing of pipelines with gaseous and liquid media including flammable gases, liquids and aggressive substances such as acids, alkalis and the like.

BACKGROUND OF THE INVENTION

Up to now, in case of need for repairs or replacement of valve closures, whether through ones, which are built-in / installed on distribution pipes, or end valve closures closing eg discharge openings on tanks, railway or road tanks, reactors in the chemical industry, etc. Before disassembling them, pump the stored media into spare reservoirs, drain the media from the entire piping system and, after repairing or replacing the valve caps, perform backward manipulation. These operations are not only technically and technologically, but also time-consuming and inefficient.

rodstata invention

Disadvantages of the prior art are largely eliminated by the pipe closure device of the present invention, the principle of which is to close the pipe with an expanding sealing cylinder of resilient material which is inserted through the faulty / repaired or replaced / shut-off valve closure into the pipe and mechanically fixed in the functional position. The design of the pipe closure device according to the present invention enables, after its fixing in the pipe in the functional position, a trouble-free dismantling of the faulty valve closure, its repair in the workshop or its replacement with non-valves, its re-assembly without the need

-2filled media or discharged from the manifold system, allowing full recovery in a short time.

The pipe closure device according to the invention consists of a closure body whose open side is provided with an external or internal thread having a diameter corresponding to the diameter of the internal or external thread of the shut-off valve to be repaired or replaced and to which the closure body is to be screwed. The closure is provided with an opening in the bottom, formed in the axis of the closure body, through which the steel tube passes tightly, inside which a rod is inserted freely, which protrudes at both ends from the steel tube. At the end of the rod facing inwardly of the closure body, an expanding sealing cylinder made of flexible material is placed between the rear and front thrust discs whose diameter in the inoperative rest position is slightly smaller than the inner diameter of the pipeline to be closed. made of non-sparking metal material. On the other end of the rod protruding from the steel tube is loosely threaded a metal ring, the outer diameter of which is equal to or slightly larger than the outer diameter of the steel tube, and the male thread provided with the end of the rod is screwed tightening nut and end tip of non-sparking metal .

In some applications, particularly for working with aggressive media, it is preferred that the steel tube passing through the opening in the bottom of the closure body is sealed by a cap nut system.

Furthermore, an internal threaded bore is provided in the bottom of the closure body, perpendicular to the axis of the closure body, into which a set screw is screwed on one side to stabilize the position of the steel tube and the grounding system is fastened in it.

which provides zero electrical potential between the pipe shut-off device and the manifold, storage tank, tank or reactor.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view of an exemplary embodiment of a pipe closure device in which the closure body is provided with an internal thread on the open side for screwing onto the external thread of a faulty shutoff valve; system with union nut.

1 is a schematic cross-sectional view of an exemplary embodiment of a pipe closure device in which the open side of the closure body is provided with an external thread to be screwed onto the internal thread of a faulty valve.

An embodiment of the invention

The pipe closure device shown in FIG. 1 consists of a closure body 1, the open side of which is provided with an internal thread which is screwed onto the external thread of the faulty shut-off valve. Further comprising a steel tube 2 through an opening formed in the bottom of the closure body 1 and to which a loosely inserted rod 2 ^»at one end projecting from the steel pipe 2 and body 1 facing the inside of the closure is threaded spacer sealing roller 4 of an elastic material. To both sides of the expanding sealing cylinder 4 abut the pressure metal discs whose diameter is at most equal to the diameter of the expanding sealing cylinder 4 in the inoperative rest position. The position of the expanding sealing cylinder 4 on the rod 2 is fixed by screwing the tip out of the shaft.

-4 sparkling metal material.

A metal ring 7 is loosely threaded onto the other end of the rod, a tightening nut 8 and a tip of a non-sparking metal material are screwed on.

The bottom of the closure body 1 has a through-hole with an internal thread perpendicular to the axis of the closure body 1. In this case, a set screw is screwed in from one side to secure the position of the steel tube 2 and from the other side lanka 11.

The steel tube 8 passing through the opening in the bottom of the closure body 1 is sealed by a sealing ring 12 inserted into the opening in the bottom of the closure body 1 and by an additional sealing system with a cap nut 13.

FIG. 2 is a schematic cross-sectional view of a pipe closure device, the closure body 1 of which is provided with an external thread on the open side for screwing onto the internal thread of a defective shut-off valve; 1 of the closure is sealed only by the sealing ring 12.

The handling of the pipe closure device of the present invention can be described as follows: after a safe preparation of the workstation where the pipe closure device is to be used, it is fastened by screwing the closure body 1 to the thread of the faulty valve and consistently connecting the earthing system through the earthing cable 11 conductively connected to a connecting screw 10 with a manifold or reservoir. At this stage, the spacer sealing cylinder is inserted inside the closure body 1 and the other components are extended outside the closure body 1.

Upon complete tightening of the closure body 1, the faulty valve is fully opened, thereby allowing the expanding sealing cylinder 4 to be ejected through the faulty shut-off valve into the closure duct, since the expanding sealing cylinder 4 forms a unit with the other components. of the closure body 1 towards the pipe to be closed.

In the next stage, by tightening the tightening nut 8, the expanding sealing cylinder 4 is compressed between the thrust discs 5, thereby increasing its diameter, so that it perfectly seals the pipe into which it is inserted.

In the subsequent phase, it is possible to safely remove the closure body 1 and subsequently the faulty valve. The pipe is completely sealed by the spacing sealing cylinder 4 and the steel pipe 2 and the projecting end of the rod 2 ^{with the} metal ring 7, the tightening nut 8 and the tip 6 protrude from the end of the pipe.

After the repair or replacement of the shut-off valve, the procedure is reversed.

Industrial applicability

The pipe stopping device of the present invention is widely applicable in all industries.

Claims (2)

PATENT CLAIMS A pipe closure device, characterized in that it consists of a closure body (1), the open side of which has an external or internal thread having a diameter corresponding to the internal or external thread diameter of the shut-off valve to be repaired or replaced and to the closure body (1) is screwed on and the other side of the closure body (1) is through an opening in the bottom of the closure body (1) formed in the closure body axis (1) through which the steel tube (2) passes (2) projecting, a rod (3), one end of which is directed towards the inside of the closure body (1), is provided between the rear and front thrust discs (5) with an expanding sealing cylinder (4) of resilient material. slightly smaller than the inner diameter of the pipe to be closed and which is fixed at the end of the rod (3) screwed on a metal ring (7) whose outer diameter is equal to or slightly larger than the outer diameter of the steel tube (2) is loosely threaded through the tip (6) of a non-sparking metal material and the other end of the rod (3) facing out of the closure body (1). and a tightening nut (8) and a tip (6) of non-sparking material are screwed in, the cap body (1) having a through-hole with an internal thread in the bottom of the cap body (1), perpendicular to its axis. On the other hand it fastens the set screw (9) and on the other side fastens the connecting screw (10) of the grounding system. Pipe closing device according to claim 1, characterized in that the bottom of the closure body (1) is provided with a sealing system with a cap nut (13).