Locking device for emergency shutoff of the pipeline

 

The invention relates to a valve and is designed to prevent losses of the working medium in the pipeline break. Locking device for emergency shutoff of the pipeline includes a housing, an input choke filter, the output fitting and the bolt. The shutter is made in the form of a spring-loaded diaphragm valve, provided with an axial hole, and a sealing element located at the end of the output fitting. The output nozzle is adjacent to the valve, provided with a spring and is arranged to move in the axial direction. The invention is directed to improving the reliability of the overlap of the pipeline when it is broken. 5 C.p. f-crystals, 1 Il.

The invention relates to a device for preventing loss of the working environment at break of the pipeline and reduce fire hazard due to possible leakage of the combustible fluid through the rupture of the pipeline.

A device for protection of the pipeline from losses at the end of a pipeline, comprising a housing with inlet and outlet fittings and movable hollow piston located lower part of the housing bore and is connected to the inlet, and in the upper part of the side surface of the openings is it part of the piston and the annular ledge above it, the hole in the casing and attached to the body of the ring, covering the piston (see RF patent 2064098 C1, 20.07.1996).

The disadvantage of this device is the lack of reliability of the overlap of the pipeline because the pipeline overlap is due to the hydrodynamic movement of the piston.

Known locking devices for emergency shutoff of the pipeline closest to the essential features is the shut-off device comprising a housing, inlet fitting with filter, the output fitting and the bolt with an aerodynamic valve and the sealing element (see RF patent 2096146 C1, 20.11.1997).

The disadvantage of this locking device is the lack of reliability of the overlap of the pipeline when the gap due to the use of aerodynamic paddles with rubber ball sealing element, which works due to the lifting force and requires vertical positioning of the device. In case of deviation from the vertical position value of the lifting force is reduced, and the reliability of the overlap of the pipeline is reduced.

The objective of the invention is to provide a locking device having high reliability overlap of the pipeline.

The decree of the filter, the output fitting and bolt, including the valve and the sealing element. The valve is made in the form of spring-loaded diaphragm valve, provided with axial and radial openings, and a sealing element located at the output end of the fitting adjacent to the valve. The execution of the shutter in the form of a spring-loaded diaphragm valve, provided with an axial hole, and a sealing element located at the output end of the fitting adjacent to the valve, provides a secure pipe is closed due to the pressure drop that occurs on the membrane at break of the pipeline.

It is advisable that the output nozzle was equipped with a spring and was made with the possibility of moving in the axial direction. This embodiment of the output fitting ensures a reliable seal when the rupture and the possibility of multiple valve opening after the removal of the accident.

It is advisable that the axial hole in the valve was performed stepwise, and the ratio of hole diameter from the inlet fitting to the diameter of the hole from the side of the sealing element ranged from 0.1 to 0.5. The presence of stepped holes with the specified ratio creates the need for C is user was equipped with a handle, posted on rails, to ensure its axial movement. The presence of arms, placed on the rails, allows for repeated opening of the valve after removing the accident.

It is advisable that the output nozzle was supplied with o-ring seal made of elastic material. Have the seals allows for axial movement of the fitting, ensuring tightness.

It is advisable that the valve was provided with annular stop limiting the axial travel of the valve, and the magnitude of the axial movement of the valve was less than the value of the axial movement of the output fitting. The presence of the stop and the ratio of the axial movements of the valve and the output valve provides a guaranteed opening of the valve by the handle after removing the accident.

It is advisable to inlet port was equipped with a coupling nut for attachment to a container of flammable liquid.

It is advisable that the sealing element is made of elastic material such as rubber, Teflon, etc.,

The analysis of the prior art showed that the claimed set of essential features set forth in the claims, is unknown. This allows you to make "inventive step" conducted an additional search of known technical solutions in order to identify signs, match the distinctive features of the prototype of the characteristics of the claimed technical solution. Found that the claimed technical solution is not obvious from the prior art. Therefore, the claimed invention meets the criterion of "inventive step".

The invention is illustrated in the drawing and a description of the operation of the claimed device.

The drawing shows an axial slit declared locking device.

The locking device includes a housing 9 to the inlet 1, with locking nut 2 and the outlet fitting 12 with a handle 11. In the cavity of the housing 9 are the filter 3, the membrane 4 with a valve 5 and a spring 6, the sealing element 7 is placed on the output end of the fitting 12. The output socket is provided with a spring 8, and the sealing ring 10, and the guide 13. The locking device 5 provided with a stepped bore 14, 15 and annular stop 16.

The device operates as follows. During normal operation, the valve 5 is opened by matching the force of the spring 6 and the differential pressure in the cavities a and B. the Liquid through the fitting 12 is supplied to consumers. With a sharp increase in consumption, which corresponds to the rupture of the consumer, the small hole 15 no time of propylene between cameras a and B. The specified differential overcomes the force of the spring 6, the locking device 5 is moved and reaches the sealing element 7, providing an overlap of the output channel. When breakdown fitting 12 of the handle 11 is discharged in the axial direction and held to equalize the pressures in chambers a and B. Under the action of the force of the spring 6 valve moves to the left and opens a channel for passage of liquid. After releasing the handle 11, the valve remains open.

Based on the above we can conclude that the stated closing device can be implemented with the achievement of the claimed technical result, i.e., it meets the criterion of "industrial applicability".

Claims

1. Locking device for emergency shutoff of the pipeline, comprising a housing, inlet fitting with filter, the output fitting and bolt, including the valve and the sealing element, wherein the shutter is made in the form of a spring-loaded diaphragm valve, provided with an axial hole, and a sealing element located at the output end of the fitting adjacent to the valve, whereby the output socket is provided with a spring and moved possibility is being stepped, the ratio of hole diameter from the inlet fitting to the diameter of the hole from the side of the sealing element is from 0.1 to 0.2.

3. The locking device according to p. 1, characterized in that the output of the adapter is provided with a handle placed on the guides.

4. The locking device according to p. 1, characterized in that the output of the adapter is provided with a ring seal made of elastic material.

5. The locking device according to p. 1, characterized in that the valve is provided with an annular stop limiting the axial travel of the valve.

6. The locking device according to p. 5, characterized in that the axial movement of the valve is less than the amount of the axial movement of the output fitting.

 

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