SU909393A1 - Locking device - Google Patents

Description

one

The invention relates to valves for shutting off pipelines, and in particular to shut-off devices for one-time operation, ensuring the shutdown of pipelines under high gas pressure using an explosive actuator.

A device operating from a squib and consisting of a body with a pipeline that has a weakened section and a slide with a knife 1 is known.

The drawbacks of the device are the non-parallel arrangement of the cut planes of the cut thinned pipeline section and the sealing surfaces of the cut, which creates a contact pressure that is different around the perimeter and reduces the reliability of the sealing.

The closest in technical essence to the present invention is a device comprising a housing with a pipeline, a movable closure member

With sealing conical surface, located in the housing bore and in contact with the pipeline, and the actuator 2j.

The drawback of the device is the presence of a weakened cross section, which significantly reduces the carrying capacity of the pipeline and prevents the use of this design for pipelines under high gas pressure, on the order of 1.5-2 thousand kgf / cm.

The purpose of the invention is to increase the reliability of sealing of the high pressure pipeline before and after the shutdown.

The goal is achieved by the fact that the opening in the housing in which the locking member is located corresponds to the shape of the locking member, in

Claims (2)

The latter is radial grooves on the side of the pipeline, and a through hole is made parallel to the pipeline, in which a liner of plastic material is installed, the distance between the axis of the opening and the pipeline being given by the ratio 1 S where 1 is the distance between the axis of the opening and the pipeline; S is the stroke of the locking organ; D is the diameter of the pipeline. FIG. 1 shows the locking device, section, general view; in FIG. 2, section A-A in FIG. one; in fig. 3 - the porous device after triggering in FIG. k is a section BB in FIG. 1. The locking device consists of a body 1 with a pipe 2 installed in it. considering the stroke of the locking member 4. Expansion 7 of the grooves 6 ensures optimal distribution of the material during the transmission of the pressure pulse of the locking member k through the self-sealing cuff 8 from the actuator 9. The groove 10 ensures the fixation of the pipeline 2 relative to Lock the orgay 4. In the hole 11 is installed liner 12, made of plastic material with a negative coefficient of thermal expansion, such as fluoroplastic-4. There are flats on the locking organ. The device operates as follows. When the igniter 9 is triggered, a force is developed from the pressure of powder gases, which act on the self-sealing cuff 8, transferring pressure to the locking organ k. When moving, the locking body closes the cavities formed by the grooves 6, and its cutting edges cut out part of the pipeline 2. When the cavities 6 are closed, the parts of the locking body form not a circle, but a figure of four sectors, while there are gaps that destroy the tightness of the overlap. For the elimination of the negative effect of these gaps, flats 13 are made. The liner material is preferably taken with a negative coefficient of thermal expansion. This results after triggering and cooling. to an increase in the volume of the liner material and its flowing into the cavity of the eubbing, which ensures reliable sealing of the overlap. During operation of the proposed device, a high tightness of the overlapping of the duct of the pipeline under high gas pressure is ensured. Shock overloads are reduced due to smooth movement when the cavities formed by the grooves are closed. Claims: cones. a chested surface located in the housing bore and in contact with the pipeline, and pyroprovod, characterized in that, in order to increase the reliability of the sealing of the pipeline before and after closing, the opening in the housing in which the locking member is located corresponds to radial grooves are made in the pipeline, and a through hole is made parallel to the pipeline, in which a liner of plastic material is installed, the distance between the axes of the opening and the pipeline being set 1-I ratio where 1 is the distance between the axis of the hole and the pipeline; stroke of the locking organ; diameter of the pipeline. Sources of information taken into account in the examination 1. US patent number 3332 32, cl. F 16 K 13/06, 1967. 2. USSR author's certificate number 537212, cl. F 16 K 13/06, 197. Y-A Vus.2 B-6 I ° iZ. V