SU1733853A1 - Device for protecting gas discharge tube from atmospheric precipitate penetration - Google Patents

Abstract

Use: in devices to prevent precipitation from falling into waste pipe-candles. The invention: the device comprises a central screen made in the form of a disk 1, a conical and cylindrical shells 2, 3, fastened together by means of rods. Under the pressure of the gas discharged through the safety valves, the device moves along the pipe 5 to a fixed upper position. When gas discharge is stopped, the device returns to its original position. The upper position is fixed by stoppers rigidly fixed outside the pipe 5 at its shear. 1 h. item f-ly, 2 ill. Yu

Description

The invention relates to gas, chemical, petrochemical, and petroleum refining industries and relates to devices for preventing precipitation from falling into waste pipe-candles.

Devices are known in which the end of the candle bends in a semicircle — goose necks — in order to avoid clogging and rain and snow.

Also known purge plugs from safety valves, the tip of which is made in the form of a T-shaped structure or in the form of tapered caps fixed above sections of discharge pipes.

A device is known that communicates with the atmosphere in which the cover is provided

bent down paws. With increasing pressure in the chamber, air is released into the atmosphere, but due to the design of the lid, the air flow is directed downwards.

The disadvantage of these devices is their insecurity during operation, due to the fact that the gas from the tip is either thrown down or horizontally, as a result of which the gaseous area is much larger than when the gas is ejected upwards and the explosive cloud easily reaches nearby sources of fire and ignite is.

As a prototype of the selected device containing a cone, facing a large base up, shell, mouth VJ

with

CJ 00

ate

Gj

new on the gas pipe, with an annular gap and a central screen.

The disadvantage of this device is that the cone shell is rigidly mounted on the pipe without movement, the central screen is made in the form of an overturned cone embedded inside the shell, which may be acceptable for ventilation systems, but not for candles, as it will create additional - against gas release when safety valves are triggered.

The aim of the invention is to increase safety when safety valves are triggered. The goal is achieved by the fact that the device is provided with a cylindrical shell bonded to the cone shell installed with the possibility of reciprocating movement on the waste pipe, and the central screen is made in the form of a disk, with the disk, the conical and cylindrical shell attached together by means of rods.

The invention provides not only reliable protection against precipitation, but also the direction of the flow of waste gases upward due to the presence of a conical shell rigidly connected to the central screen.

The presence of a cylindrical shell provides a reciprocating movement of the device along the waste pipe, and the stops rigidly mounted on the pipe at its cut-off serve to limit the movement of the device and prevent its discharge from the pipe under the action of the gas flow,

Fig, 1 shows the proposed device; FIG. 2 is the same, top view,

The device contains a central screen made in the form of a disk 1, a conical shell 2, a cylindrical shell 3, fastening the cores 4 of the shells.

To the pipe 5, at its cut, stops 6 are rigidly attached outside.

The device works as follows.

In the normal state, the central screen 1 is resting on the cut of pipe 5 in such a way that precipitation cannot get inside the pipe. When a safety valve is triggered by a gas flow, the central screen 1 rises through pipe 5 with the help of cylindrical shell 3 until it stops 6. Through a gap formed between the cut of pipe 5 and central screen 1, gas rushes to the sides, but encountering a conical shell on its way 2, deflects upwards. When the valve is closed, the device lowers through the pipe and closes its cut with its central screen 1.

The advantages of the proposed device over the prototype are as follows:

in the normal state, the pipe cut is completely closed, which completely excludes precipitation from it;

when gas is discharged, the device rises freely above the cut and does not prevent the outflow of gas;

when gas discharge is stopped, the device returns to its original position.

Claims (2)

1. A device to prevent precipitation from entering the waste gas pipe containing a cone shell mounted on the latter and fixed to each other, with an annular gap relative to the pipe and facing upwards with a large base, and with a view to increasing the safety of work , it is provided with a cylindrical shell, bonded with a conical shell and installed with the possibility of reciprocating movement on the waste pipe, and the central screen is made in the form of a disk. 2. Device pop. 1, characterized in that the disk, the conical and cylindrical shells are fastened together by means of rods. 2