RU2760403C1 - Gas shutoff valve with electromagnetic control - Google Patents

Abstract

FIELD: valves.

SUBSTANCE: invention relates to valve engineering, namely to apparatuses of automatic shutoff pipeline valves. The gas shutoff valve with electromagnetic control comprises a body made in the form of an integral multi-stage sleeve with a threaded inlet and outlet. Installed coaxially inside the sleeve is a slide valve made in the form of a streamlined body of rotation with a spherical base on one side and a blind hole on the other side, with four centering protrusions with a permanent magnet installed in the hole. An insert with a filter is installed in the body coaxially along the input thread so as to provide free movement for the slide valve and the magnet along the axis of the body. A membrane is coaxially installed in the body on the side of the outlet. An outlet nut is coaxially set on the sleeve. Rings made of a soft magnetic material are rigidly fixed on the outer surfaces of the largest and smallest diameters of the body. An annular magnet is fixed rigidly on the pusher. A solenoid is rigidly fixed on the body.

EFFECT: simplified manufacturing technology, increased strength and throughput capacity of the valve.

1 cl, 4 dwg

Description

The invention relates to valves, namely to devices for automatic shut-off pipeline valves, and is intended for use in the gas and chemical industries.

Various designs of automatic check valves are known.

There is a known electromagnetic gas valve (patent for a useful model of the Russian Federation No. 168188, publ. 23.01.2017), which includes: a housing made of non-magnetic metal, made in the form of a hollow cylinder, located coaxially with the controlled line; a nut in the form of a sleeve made of magnetic metal, threaded at one end of the housing coaxially with its longitudinal axis; a fitting in the form of a sleeve made of magnetic metal, threaded at the other end of the housing coaxially with its longitudinal axis; a spool made in the form of a glass made of a polymer material with external guide ribs facing the bottom towards the fitting; a sealing gasket fixed by a screw coaxially with the longitudinal axis of the body at the end of the spool; an armature made in the form of a thin-walled glass of magnetic metal, bottom facing towards the fitting, and located inside the spool coaxially with the longitudinal axis of the valve until it stops with the outer wall of its bottom against the inner wall of the spool bottom; a magnetic element made in the form of a sleeve located concentrically around the body; a bobbin made of non-magnetic electrically insulating material with a removable end wall, fixed to the housing concentrically around the magnetic element without the possibility of both movement along the housing and rotation around it; control winding wound around the bobbin.

The disadvantages of this model are the likelihood of violation of the body tightness due to unwinding during installation on the pipeline, high resistance to the flow of the working medium, since the spool is made in the form of a glass with a hole facing the flow, which at high flow rates will inevitably lead to the occurrence of zones of increased pressure in front of the spool, the presence of a hole in The spool under the screw for installing the gasket can also become a place of leakage if the contact between the screw and the gasket is broken.

Known is a gas shut-off valve with electromagnetic control (patent for invention of the Russian Federation No. 2638122, publ. 12/11/2017), which contains a cylindrical frame with a locking ring, a shut-off element made in the form of a shutter with a gasket, an inlet pipe and an outlet pipe with a saddle, made made of non-magnetic material, a control unit located in the casing over the frame and including at least one coil, a pusher, a magnet and a connector. Moreover, the coil and the magnet are located in relation to each other in such a way that when an electric pulse is applied, the magnetic flux created by the coil moves the magnet and the shutter towards the saddle, the shutter is pressed against the saddle of the outlet pipe, blocking the flow of the working medium. In this case, the fixing ring, coil, pusher and magnet are located coaxially with the frame on its outer surface and are separated from the controlled working environment, the casing with the control unit is made with the possibility of free rotation around the longitudinal axis of the valve. In turn, the pusher is made in the form of a cylinder with a protruding ring for manual control.

The disadvantages of this design are the presence of threaded connections that ensure tightness and low flow capacity of the valve.

An electromagnetic gas valve (patent for a useful model of the Russian Federation No. 168714, publ. 16.02.2017) contains: a body made of non-magnetic material, made in the form of a hollow cylinder, located coaxially with the controlled line; a nut in the form of a metal sleeve threaded at one end of the housing coaxially with its longitudinal axis; a fitting in the form of a sleeve made of magnetic metal, threaded at the other end of the housing coaxially with its longitudinal axis; a spool made of magnetic material and located inside the housing coaxially with its longitudinal axis; a sealing washer fixed at the end of the spool coaxially with the longitudinal axis of the body; a magnetic element in the form of a sleeve located around the body; a frame made of a non-magnetic electrical insulating material and a control winding placed on it, located around the magnetic element; a sleeve of non-magnetic material in the form of a sleeve located around the magnetic element; a plug made of non-magnetic material in the form of a sleeve located around the body, a retainer made of magnetic metal in the form of a flat annular washer located concentrically around the body. In this case, the end of the sleeve facing the nut has an inward flange, the end of the plug facing the fitting has a flange outward, and the cylindrical part of the plug is located in the space between the end of the magnetic element, the outer surface of the housing wall and the inner surface of the sleeve wall.

The disadvantage of this design is the lack of structural strength. Increased requirements are imposed on the strength of the shut-off valves, since after installation on the pipeline, the valve is an integral part of the pipeline and bears the mechanical load, which is transferred to it by the pipe section before and after the valve. All this load is applied to a greater extent on the thin-walled valve frame, made of non-magnetic material, to ensure the functioning of the electromagnetic actuation mechanism.

Also, a design drawback is the fact that the coaxial valve body, coaxially mounted on the pipeline, is made of three parts - a body, a nut and a threaded union. By itself, the thread in the pipelines is a vulnerable connection point that requires increased attention during installation work, and in this case, in addition to two threads for direct connection of the fittings to the pipes, two more threaded connections are added in the body of the device itself, violation of the integrity or loosening of which in the process installation on the pipeline will lead to an unacceptable violation of the tightness of the entire system.

Also disadvantageous is the fact that the spool must be made of magnetic material in order to provide a connection between the magnetic element and the spool. This connection is the greater, the closer the spool surface is to the magnetic element, thus it is necessary to increase the spool area in the cross-section of the housing, which inevitably entails a decrease in the throughput of the device.

An object of the present invention is to provide an automatic check valve that is reliable in operation.

The technical result of the claimed invention is to simplify the manufacturing technology, increase the strength and throughput of the valve.

The specified technical result is achieved due to the fact that a gas shut-off valve with electromagnetic control includes a body made in the form of a one-piece multistage bushing with inlet and outlet threaded holes, inside which a spool made in the form of a streamlined body of revolution is installed coaxially, with a spherical base on one side and a blind hole on the other with four projections for centering with a permanent magnet installed in the hole, an insert with a filter is installed in the body coaxially along the inlet thread so as to provide a slide valve with a magnet free movement along the body axis, a diaphragm is installed coaxially into the body from the outlet side of the body and is fixed by a sleeve along the outlet thread of the body, and the inner diameter of the membrane is much less than the inner diameters of the body and the sleeve, the outlet nut is coaxially put on the sleeve, so that the nut is free from movement along its own axis, but has the freedom to rotate around it, on the outside On the outer surfaces of the largest and smallest diameters of the body, rings made of soft magnetic material are fixedly installed so that they provide movement along their own axis of the pusher made of non-magnetic material, coaxially mounted on the body, a ring magnet is fixed on the pusher, so that the magnetic poles of the magnet on the pusher and of the magnet in the spool were directed mutually oppositely, the solenoid was fixedly mounted on the housing.

The claimed invention is illustrated by drawings.

(Fig. 1) - valve in longitudinal section,

(Fig. 2) - position of the spool "Valve open",

(Fig. 3) - position of the spool "Valve closed",

(Fig. 4) - spool valve.

Positions in the illustrations indicate:

1 - case,

2 - spool,

3 - small magnet,

4 - insert with filter,

5 - membrane,

6 - bushing,

7 - nut,

8 - ring,

9 - ring,

10 - pusher,

11 - ring magnet,

12 - solenoid.

The inventive gas shut-off valve with electromagnetic control includes a housing 1 made in the form of a multi-stage one-piece bushing with inlet and outlet threaded holes, inside which a spool 2 is coaxially installed, having the shape of a streamlined body to reduce the resistance of the working medium of a body of rotation with a spherical base on one side and a blind hole on the other with four lugs for centering with a permanent magnet installed in the hole 3.

An insert with a filter 4 is installed in the body 1 coaxially along the inlet thread so as to provide the spool 2 with a small magnet 3 free movement along the axis of the body 1.

On the side of the outlet opening, the membrane 5 is coaxially installed in the body 1 and is fixed by the sleeve 6 along the outlet thread of the body 1, and the inner diameter of the membrane 5 is much less than the inner diameters of the body 1 and sleeve 6. The membrane simultaneously performs 2 functions: it ensures the tightness of the interface between body 1 and sleeve 6 and forms a seat for the spool in the closed position.

The output nut 7 is coaxially put on the sleeve 6, so that the nut is free from movement along its own axis, but has the freedom to rotate around it.

On the outer surfaces of the largest and smallest diameters of the housing 1, rings 8 and 9 of soft magnetic material are fixedly mounted so that they provide movement along their own axis of the pusher 10 of non-magnetic material coaxially mounted on the housing 1.

An annular magnet 11 is fixed on the pusher 10, so that the magnetic poles of the magnet 11 and the magnet 3 are mutually opposite.

Solenoid 12 is fixedly mounted on body 1.

The valve works as follows.

The valve is normally open. In this case: the spool 2 is in the extreme left position (Fig. 2), the pusher 10 is in the extreme right position inside the solenoid 12. The pusher is fixed in this position due to the mutual attraction of the ring magnet 11 and the ring 9. The working medium is supplied from the inlet housing holes 1.

When a control current pulse is applied to the solenoid 12, the resulting magnetic field pushes the pusher 10 with the ring magnet 11 all the way towards the ring 8. Since the poles of the magnetic fields of the ring 11 and the small 3 magnets are opposite, there is a mutual repulsion of the pusher 10 and the spool 2. The spool moves into the extreme right position and the conical surface mates with the inner surface of the membrane 5, blocking the flow of the working medium.

In the closed state, the pusher 10 is held by the mutual attraction of the ring magnet 11 and the ring 8.

To open the valve, it is necessary to manually move the pusher 10 to the extreme right position, while the spool 2 will move to the extreme left position, opening the flow of the working medium.

The valve can be closed manually. To do this, it is necessary to move the pusher 10 to the extreme left position, while the spool 2 will move to the extreme right position and cut off the flow of the working medium.

Claims (1)

A gas shut-off valve with electromagnetic control, including a body made in the form of a one-piece multistage bushing with inlet and outlet threaded holes, inside which a spool made in the form of a streamlined body of revolution is installed coaxially, with a spherical base on one side and a blind hole on the other with four lugs for centering with a permanent magnet installed in the hole, an insert with a filter is installed in the body coaxially along the inlet thread in such a way as to provide the spool with a magnet free movement along the body axis, a diaphragm is installed coaxially into the body from the outlet side and fixed by a sleeve along the outlet thread body, and the inner diameter of the membrane is much less than the inner diameters of the body and the sleeve, the output nut is coaxially put on the sleeve in such a way that the nut is free from movement along its own axis, but has the freedom to rotate around it, on the outer surfaces of the largest and smallest diameters of the body the whiskers are fixedly mounted rings made of soft magnetic material in such a way that they provide movement along their own axis of the pusher made of non-magnetic material coaxially mounted on the body, a ring magnet is fixedly fixed to the pusher so that the magnetic poles of the magnet on the pusher and the magnet in the spool are directed mutually opposite , a solenoid is fixedly mounted on the body.

Images