Terminatory valve

 

(57) Abstract:

The invention relates to household and industrial gas units and is designed to protect the gas supply systems in emergency situations, such as off gas in case of fire. Terminatory valve includes a housing. In the cavity of the body is placed a transverse sprocket. The outer rim sprocket is fixed in the housing retaining ring connected by spokes to the hub. The latter provided with a guide rod spring-loaded locking element. In one of the spokes are made through the longitudinal channel. It from the side of the rim is set to the pressure screw and posted by the movable pin. The latter acts on the ball stopper that is located in the groove of the rod and locking it in the open position. Between the pressure screw and a movable pin posted by fuse. Fuse made in the form of thermosensitive cylinder. In the walls of the spokes in the area of thermosensitive cylinder holes. These holes are perpendicular to the axis of the cylinder. The result is increased reliability of operation thermoshaping valve by increasing the stability of the valve opening temperature and Lisitsa to domestic and industrial gas units and is designed to protect the gas supply systems in emergency situations, for example, the off gas in case of fire.

Known automatic terminatory valve, comprising a housing, a cavity which is opposite the bore hole has the locking element is spring-loaded and is equipped with a stopper and a fusible link, the stopper is made in the form of a washer with distantierului legs with one hand and restrictive feet on the other side, and fuse in the form of a Cup with two diametrically spaced grooves, which are placed in the wall section of the washer, the internal cavity of the glass filled with fusible substance, and through its open end withdrawn fixing the locking element of the rod, and the locking element is designed in the form of a ball (see patent RU 2149303, IPC 7 F 16 TO 17/40, 20.05.2000).

However, this terminatory valve does not ensure the required stability of operation at a given temperature, which limits the scope of its use.

Closest to the invention to the technical essence and the achieved result is terminatory valve, comprising a housing, a cavity which is placed a transverse sprocket, outer rim which is fixed in the housing retaining ring connected by spokes to the hub, where the longitudinal channel, which side of the rim is set to the pressure screw and posted by the movable pin acting on the ball stopper that is located in the groove of the rod and locking it in the open position, the pressure between the screw and the movable pin posted by fuse (see catalog company AZ INDUSTRIETECHNICK GmbH, DE, 20.06.2001, S. 3. Termorazdelitelnymi valve TGSA).

This valve ensures its automatic operation, however, this valve has a number of disadvantages that are associated with those that do not provide stable triggering a fuse temperature depending on the load, is not achieved, the stability of the load on the ball stopper depending on the deviation of the radius of the notches on the stem of the locking element, the valve has a relatively large hydraulic resistance (large pressure loss) due to sudden changes in flow area.

Task to be solved by the present invention is directed, is to increase the reliability of operation thermoshaping valve by increasing the stability of the valve opening temperature, reducing the hydraulic resistance of the flow channel of the valve and increase the stability of the load on the ball stopper. This stated sprocket, the outer rim which is fixed in the housing retaining ring connected by spokes to the hub, provided with a guide rod spring-loaded locking element, and in one of the spokes are made through the longitudinal channel, the sides of the rim is set to the pressure screw and holds the movable pin acting on the ball stopper that is located in the groove of the rod and locking it in the open position, the pressure between the screw and the movable pin posted by fuse, the latter made in the form of thermosensitive cylinder, and in the wall of the spokes, in the area of thermosensitive cylinder, with holes, perpendicular to the axis of the cylinder.

In addition, the side wall of the groove in the stem of the locking element from its free end may be made inclined, and the output end face of the locking element is equipped with a fairing with decreasing cross-section.

Analysis of timosaponin valves showed that a significant effect on the stability of the valve has a design of a structural element that hosts the fuse, as well as the design of the fuse block. Performing in the wall of the spokes in sanitarios thermosensitive cylinder when it is triggered, that dramatically increases the speed of operation of the valve in emergency situations by reducing the inertia of the valve associated with the process of increasing the pressure inside the channel, which has a thermosensitive cylinder. Design thermoshaping valve allows you to use as a fuse sensing cylinders, which produced industrial and manufacturing technology which has been well developed, which also contributes to increasing the reliability of operation thermoshaping valve. Additional opportunities for improving the reliability of valve operation gives the execution a side wall of the groove from the side of the free end of the rod, which cooperates with ball stopper, inclined, i.e., formed by a conical surface. As a result of contact of the ball with the side of the inclined wall of the groove of the reaction support is always perpendicular to the generatrix of the conical surface, regardless of the location of the ball of the stopper relative to the grooves, which also increases the stability of the actuation of the valve by reducing the requirements to precision grooves or ball stopper. The execution of the locking element with the fairing with decreasing cross-section of postvisit the seat face of the locking element to form the surface of the housing, that provides the opportunity to further reduce the hydraulic losses in the flow area of the valve.

Thus, achieved the goals set forth in the invention problems - increased reliability thermoshaping valve.

In Fig.1 shows a longitudinal section thermoshaping valve, and Fig.2 shows in an enlarged size of the structural element of the valve in the place of installation of thermosensitive cylinder.

Terminatory valve includes a housing 1, in the cavity of which is placed a transverse sprocket 2, the outer rim 3 which is fixed in the housing 1 retaining ring 4 and is connected by a 5 spokes with the hub 6, provided with a guide rod 7 8 is loaded by a spring 9 of the locking element 10. In one of the spokes 5 are through the longitudinal channel 11, which side of the rim 3 has a pressure screw 12 and in which is placed a movable pin 13 acting on the ball stopper 14, which is located in the groove 15 of the rod 8 and locking it in the open position. Between the pressure screw 12 and a movable pin 13 posted by fuse 16. Fuse 16 in the form of thermosensitive cylinder, and in the wall of the spokes 5, in the area of thermosensitive cylinder, with holes 17th end made inclined. The output end of the locking element 10 is equipped with a fairing 19 with decreasing cross-section.

In the initial position terminatory valve is in the open position. This spring 9 located between the locking element 10 and the sprocket 2 is compressed and held in this condition by means of a ball stopper 14. In emergency situations, for example when the temperature in the valve or around it, the fuse is melted. As a result, the force of the adjusting screw 12 is no longer transmitted to the movable pin 13 and the latter no longer holds the ball stopper 14 in the groove 15. When the rod is released and under the action of the spring 9 shut-off element 11 by moving to the extreme right position, blocks the flow area of the housing 1 by putting the valve in closed position.

The present invention can be used wherever you want to automatically shut off the flow area of the pipeline, in particular gas in emergency situations, such as fires.

1. Terminatory valve, comprising a housing, a cavity which is placed a transverse sprocket, outer rim which is fixed in the housing retaining ring and connect the th of spokes are arranged end-to-end longitudinal channel, which side of the rim is set to the pressure screw and holds the movable pin acting on the ball stopper that is located in the groove of the rod and locking it in the open position, the pressure between the screw and the movable pin posted by fuse, wherein the fuse is made in the form of thermosensitive cylinder, and in the wall of the spokes, in the area of thermosensitive cylinder, with holes perpendicular to the axis of the cylinder.

2. Terminatory valve under item 1, characterized in that the side wall of the groove in the stem of the locking element from its free end is made inclined.

3. Terminatory valve under item 1, characterized in that the output end face of the locking element is equipped with a fairing with decreasing cross-section.

 

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