RU2418220C1 - Shut-off electro-magnetic valve - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: shut-off electro-magnetic valve consists of direct-flow case with inlet and outlet orifices, of spring-loaded cap and of crosspiece. The crosspiece is fixed in the case and is equipped with an orifice for the rod of the cap. An internal cylinder boring is made in the case. The boring is conjugated with the inlet and outlet orifices along conic surfaces. The cap corresponds to a cylinder with similar conic tapers on ends. The coil of the electro-magnet is secured on external surface of the case. The cap is composed of two parts. A magnet-solid insertion is positioned between parts of the cap. A rod is attached to the part of the cap on the side of the inlet orifice. Together with a spring the rod passes through the orifice in the second part of the cap.

EFFECT: extended functionality of shut-off valve and reduced dimensions.

1 dwg

Description

The invention relates to means for automatically shutting off a gas supply when the pressure in the gas pipeline drops due to damage, as well as forcing a gas shutoff when gas leaks are detected by a gas analyzer.

Known shut-off valve containing a straight-through housing with inlet and outlet openings and located inside it is a spring-loaded plate and a cross member fixed in the housing and provided with an opening for the plate stem, and an inner cylindrical bore is made in the housing, paired with the inlet and outlet openings on conical surfaces, and the plate is made in the form of a cylinder with identical conical bevels at the ends (see patent RU 76412, class F16K 17/40, publ. September 20, 2008). The disadvantages of the known valve is that it only works when an emergency temperature increase occurs and does not provide the possibility of its forced opening and closing.

The objective of the invention is to remedy these disadvantages. The technical result consists in expanding the functionality of the shut-off valve and reducing its overall dimensions. The problem is solved, and the technical result is achieved by the fact that the shut-off solenoid valve comprises a direct-flow housing with inlet and outlet openings and located inside it is a spring loaded plate and a cross member fixed in the case and provided with an opening for the plate stock, and an inner cylindrical bore is made in the case, mating with the inlet and outlet openings on the conical surfaces, and the plate is made in the form of a cylinder with identical conical bevels at the ends, on the outer surface rhnosti housing fixed coil of the electromagnet, and Tarel made of two parts, between which the magnetically hard insert, wherein the rod is attached to a portion of a plate disposed on the input side, and together with the spring extends through an opening in the second part of a plate.

The drawing shows the proposed valve in the context.

The shut-off solenoid valve has a direct-flow housing 1 with inlet and outlet openings, in which an internal cylindrical bore is made, conjugated with the inlet and outlet openings on conical surfaces. Inside the housing 1 are located loaded with a spring 2 plate 3 and the cross member 4. The plate 3 is made in the form of a cylinder with the same conical bevels at the ends. The cross member 4 is fixed in the housing 1 and provided with an opening for the rod 5. An electromagnet coil 6 is fixed on the outer surface of the housing 1, and the plate 3 is made of two parts, between which there is a magnetically solid insert 7. The rod 5 is attached to the part of the plate located on the input side, and together with the spring 2 passes through the hole in the second part of the plate. The stem 5 has a head (stop) 8, which restricts the movement of the plate along the axis of the valve in the left direction.

The device operates as follows.

If the gas pipeline is operating normally, the shut-off valve is open (see drawing). Gas, bypassing the bore in the housing 1 plate 3, passes through the gas pipeline from left to right. When pressure drops due to damage to the pipeline causing gas leakage, an ultrafast flow occurs, and the valve closes due to the high aerodynamic drag of the plate, compressing the spring 2.

To open the valve after troubleshooting, the control current is supplied to the windings of coil 6. Under the influence of a magnetic field, the valve disc moves to the working position, overcoming the force of spring 2. Then the electromagnet is turned off.

The proposed device also provides the possibility of forced closure in case of detection of small leaks by a special analyzer. In this case, a reverse polarity current is supplied to the coil 6 and the valve is held in the closed position for the required time.

The presence of a hard magnetic insert and a control electromagnet provides the possibility of forced opening and closing of the valve. Attaching the stem to the back of the plate reduces the size of the valve.

Claims (1)

A shut-off solenoid valve comprising a direct-flow housing with inlet and outlet openings and located inside it is a spring-loaded plate and a cross-member fixed in the housing and provided with an opening for the plate stem, and an inner cylindrical bore is made in the housing, paired with the inlet and outlet openings on conical surfaces, and the plate is made in the form of a cylinder with identical conical bevels at the ends, characterized in that an electromagnet coil is fixed on the outer surface of the housing And Tarel made of two parts, between which the magnetically hard insert, wherein the rod is attached to a portion of a plate disposed on the input side, and together with the spring extends through an opening in the second part of a plate.