Safety valve with rupture element

FIELD: machine building.

SUBSTANCE: invention is related to machine building and refers to protection of technological equipment. Safety valve with rupture element comprises valve body, heat-insulating and rupture elements. Valve additionally comprises lined weight lock, which closes opening in body of protected object. In upper cylindrical part of valve body there is a heat-insulating element installed, as well as sealing membrane. Membrane is pressed to valve body by means of cover. Cover is hingedly joined to lever. Lever interacts with bump stop. Unit of rupture element fixation is fixed with its upper part on lever, and with its lower part - to upper cylindrical part of valve. Rupture element consists of wire, stop bolt, fork, valve cover lever, nut, two drums. The latter are arranged accordingly in fork of valve cover lever and fork of upper cylindrical part of valve body. Ends of wire are inserted into holes of drums and then are wound on them. Clearance between forks makes around 1.53 of wire diametre. Parametres of valve are in the following optimal ranges of values: c=H/Dn=2.53.0, where Dn is diametre of upper cylindrical part of valve body, equal to maximum size of protected object body hole; H is height of assembled valve.

EFFECT: increased efficiency of technological equipment protection against explosions by improved performance and reliability of rupture element actuation.

2 dwg

 

The invention relates to mechanical engineering and can be used to usuriously technological equipment.

The closest technical solution to the stated object is an explosive valve SU 1820124 A1, F16K 17/16, 1993 (prototype)containing the valve body, a heat insulating and discontinuous elements.

A disadvantage of the known solutions is relatively low reliability of the operation of the bursting disc.

The technical result - increase of efficiency of protection of the equipment against explosions by increasing the speed and reliability of operation of the discontinuous element.

This is achieved in that the pressure relief valve with bursting element that contains the body of the valve shutter, heat insulating and discontinuous elements, additionally contains lined cargo shutter blocking the hole in the body of the protected object, and in the upper cylindrical part of the valve body is placed insulating element and the sealing membrane presses the valve body by means of a cover, pivotally connected to a lever that interacts with the bumper, mount the rupture element is attached to its upper part on the lever, and the lower to the upper cylindrical part of the valve body, the bursting element consists of a wire, retainer bolt, fork lever valve cover, nuts, two drums, which are located respectively in the fork of the lever of the valve cover and plug in the upper cylindrical part of the valve body at the ends of the wire are inserted into the holes of the drums and then reeled up on them, the gap h between the forks is about (1,53) from the wire diameter and the valve are located in the following optimal intervals of values: C=N/Dy=2,53,0, where Dy is the diameter of the upper cylindrical part of the valve body is equal to the maximum size of the openings in the protected object; H - height of the valve Assembly.

1 shows a frontal section explosion-proof valve, figure 2 - attachment site of the rupture element.

Safety valve with bursting element is mounted on the housing 1 of the protected object and contains lined cargo shutter, made in the form of two layers: the lining layer 10 overlying the hole diameter of Dy in the housing 1 of the protected object, and bulk cargo layer 2 in the form of crushed stone, gravel or sand. The valve body 3 is made in the form of a conical bottom and top of the cylindrical part, in which the insulating element 4 and the sealing membrane 5, presses the valve body by means of a cover 6, pivotally connected to the lever 8, which interacts with the bump 7. Node 9 mounting the rupture element (wire) is attached to the Oia upper part of the lever 8, and the lower to the upper cylindrical part of the body 3 of the valve. Attachment site of the rupture element consists of a wire 16, the locking bolt 11, a plug 12, the arm 13 of the valve cover, the nuts 14 and two drums 15 are located respectively in the plug 12 of the lever 13 of the valve cover and plug in the upper cylindrical part of the body 3 of the valve. The ends of the wire 16 are inserted into the holes of the drums 15 and then reeled up on them when they spin an ordinary wrench. After sufficient tension wire drums 15 are fixed locking bolts 11. It is important to note that the pressure depends only on the strength of the wire 16 and does not depend on the strength of its pull. So the valve was not preceded by large plastic deformation of the wire, its length, and hence the gap h should be minimal. The gap h must be of the order of (l,53)d, where d is the wire diameter. To the fastening end of the wire was reliable and did not allow them pulling out of the holes in the drum, it must be wound at least three turns. Hinged lid 6 through the lever 8 is held in the closed position when the discontinuous element 9, this role is performed by wire calibrated section. For complete sealing of the valve is used, the membrane 5 made of aluminium foil or of a polymeric material. Under pressure to protect the apparatus, the membrane is pressed against the cover and thus through the lever 8, all the force from the pressure transmitted to the hinge arm and breaking the wire 9. The membrane is almost completely unloaded and the pressure valve (wire breakage 9) not have a significant impact. In this sense, the membrane is not calculated element: design of the explosive valve.

If the protected device 1 occurs technological processes at high temperatures, thermal protection of the membrane 5 and other parts of the valve there are two levels of insulation. The first one is a cargo gate 2, lined with refractory material, and the second mineral wool, asbestos powder or other heat-resistant porous material 4 placed in the basket from metal rods or strips. To obtain the greatest efficiency usuriously production equipment explosion-proof valve has settings that are found in the following optimal intervals of values: C=H/Dy=2,53,0,

where Dy is the diameter of the upper cylindrical part of the valve body is equal to the maximum size of the hole of the housing 1 of the protected object; H - height of the valve Assembly.

Safety valve with bursting element is as follows.

The pressure in the protected apparatus affects the cover 6, as the shutter 2 overlaps the inlet negerlein and with the rapid increase of pressure he can lift what I and the insulating layer 4 of porous. When the valve cap 6 is dropped all the way into the bump stops 7, backfilling 2 and the insulating element 4 by the gas stream emitted from the cavity of the valve.

After the end of the gas discharge stopper and the lid down and close the discharge hole of the valve. While the tightness of the valve is not fully restored, however, the intense suction of air from the atmosphere into the cavity of the protected apparatus, which can cause a secondary explosion in the equipment, is excluded.

After actuation of the valve and eliminate the causes of the explosion in the equipment, the valve must be restored, i.e. it is necessary in the basket to lay insulating layer.

For chemical and other allied industries whose products and valuable, and extremely harmful to the environment, the condition of complete integrity should be considered as a priority, largely determines the scope of possible applications.

Safety valve with bursting element that contains the body of the valve shutter, heat insulating and discontinuous elements, characterized in that it further contains lined cargo shutter blocking the hole in the body of the protected object, and in the upper cylindrical part of the valve body is placed insulating element and g is rotisery membrane, presses the valve body by means of a cover, pivotally connected to a lever that interacts with the bump stop and the attachment site of the rupture element is attached to its upper part on the lever, and the lower to the upper cylindrical part of the valve body, and a bursting element consists of a wire, retainer bolt, fork, arm valve cover, nut, two drums, which are located respectively in the fork of the lever of the valve cover and plug in the upper cylindrical part of the valve body at the ends of the wire are inserted into the holes of the drums and then reeled up on them, and the gap h between the forks is about (1,53) from the wire diameter and the valve are located in the following optimal intervals of values: c=H/Dy=2,53,0,
where Dy is the diameter of the upper cylindrical part of the valve body is equal to the maximum size of the openings in the protected object; H - height of the valve Assembly.



 

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