JPS5846281A - Assembly of overflow valve - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a double rupture disk autoflow assembly activated by an explosive charge disposed between the rupture disks and having improved low-destructive operation. More particularly, a central elongated selectively activatable explosive charge extends at least partially across the fluid conduit, and includes a pair of spaced apart frangible rupture disks. That is, it is placed between the diaphragms. This pulp assembly can be used extensively to protect spring reactors or other structures from major damage.

Various types of overflow assemblies have been used for many years in structures susceptible to major damage, such as fire extinguishers or chemical reactors. one or more ruptureable rupture disks or diaphragms disposed across the rupture disk, an explosive element being disposed in contact with or proximate the disks;
This element is operatively connected to a detonation and detection device. When the device detects a hazardous condition (eg, a critical change in pressure or temperature within the structure to be protected), a detonator is activated causing the element to explode and rupture the disk. As a result, the relief passage is opened and the structure to be protected can escape quickly and safely.

Although such oat-Flono Lube assemblies are widely available, they suffer from a number of problems. As one example, it has been difficult and/or impossible to effectively cool the overflow pulp unit when such assemblies are used in chemical reactor environments where the temperatures are relatively high.

Therefore, the disk deforms and its operating characteristics change. Moreover, if the explosive charge incorporated into the disk is in direct contact with the disk, the high temperatures will melt the charge and completely destroy the effectiveness of the assembly.

If the explosive charge comes into direct contact with the rupture disc, the impact of the explosion will cause the disc to open. This model starts with IJ
There is a tendency to create some uneven fractures in the flow path of the IJ-F conduit, thereby making accurate operational control of the entire pulp assembly difficult.

Also, in the past, cuts have been made in the rupture disc to weaken it. This large size cut forms a predetermined rupture nositer 7 in the disc. That is,
The disc is broken along the cut line. However, proper cuts to adequately weaken the disk, while not unduly sacrificing the structure of the disk, are problematic and generally costly. Accordingly, those skilled in the art have attempted to develop pulp assemblies without cuts in the diaphragm or disk.

The above-mentioned problems have been greatly ameliorated by the present invention which provides an improved controlled actuation pulp assembly. Roughly speaking, this assembly is an IJ, such as a chemical reactor, etc.
- an elongated fluid conduit connected to the structure to be accessed and first and second frangible members spaced opposite each other within the conduit to block material passing through the conduit; There is.

An elongated explosive element is disposed within the conduit and extends at least partially across the conduit and is disposed between each of the frangible members in spaced relation to the members. Means, such as a detonator, is operatively connected to the explosive element to selectively activate and detonate the element to rupture the frangible member and cause material to flow through the conduit.

In another embodiment of the invention, a cooling fluid inlet and an outlet are provided in communication with a portion of the conduit between the first and second frangible members, respectively, so that the cooling fluid, such as water, can flow to the disk. is introduced between the valves to cool the entire valve assembly.

In other embodiments, a knife is placed adjacent one or both of the frangible discs.

This makes the assembly more susceptible to destruction when Azenpuri is first started. In this case, each disk can be made flat, uneven, or any other shape depending on the design conditions. Additionally, one or both of the discs can be scored and the discs can be coated with a synthetic resin material such as Teflon to protect them from corrosive materials.

The explosive element preferably comprises an elongated cylindrical body extending across the conduit and is connected to a detonator located on the exterior of the conduit. Advantageously, the explosive charge consists of a central explosive part, an outer explosive part surrounding it, and a plastic sheath arranged around the outer explosive part. These explosive parts are E, 1. Preferably, it consists of a so-called "data code" sold by DuPont.

Hereinafter, nine embodiments of the present invention will be described in detail with reference to the drawings.

Referring to the drawings, an overflow valve assembly 10 is shown in FIGS. 1 and 2.

The assembly includes first and second spaced apart frangible diaphragm members 14 and an elongate conduit connected to the structure to be relieved, such as a chemical reactor.
16, an elongate explosive element 18, and an initiating unit 20 operatively connected to the element.

More specifically, the conduit has an elongated tubular member 22 which is connected to the structure to be connected to the IJ and has a flange 24 attached to its upper end (see FIG. 1). . A second tubular body 26 is provided and positioned on the flange 24. 1[[26 includes a pair of opposing openings 28 for receiving bushings in the explosive element 18.
is provided, and also.

A pair of opposing entrance and exit openings 3o are also provided. A ring 32 is located at the upper end of the tubular body 26 and has an upper flange 34 thereabove. A plurality of ports 66 and nuts 38 extend between the flanges 24, 34 to secure the structures described above together so that the parts cooperate with each other to form an elongated conduit.

The first diaphragm member 14 has a concave-convex shape as shown and includes a flat peripheral edge 40, which is connected to the tubular body 26.
It is disposed between the upper surface and the lower surface of the ring 32 and is gripped. The easily broken member 16 has a similar uneven shape and is provided with a flange 42, which is similar to the flange 2.
4 and the lower side of the tubular body 26 and is gripped. As shown, each of the members 14, 16 is disposed across the passageway formed by the conduit 12 to block fluid flow therethrough at any time.

Explosive element 18 is preferably a "data code."

It is in the form of an elongated cylinder 44 made of explosive material. The cylinder 44 extends at least partially, and more preferably entirely, across the passageway formed by the conduit 12 and is spaced between and with respect to both of the nine members 14,16. There is. A pair of conventional connector bushings 46 are provided at opposing openings 2 in the tubular body 26, respectively.
These bushings are located within the explosive elements 18.
It serves to maintain the above-mentioned arrangement between the breaking members 14 and 16. Additionally, a detonator 48 is located within the bushing 46 on the left side as viewed in FIG. The detonator is conventionally connected by a wire 50 to a detection device such as a pressure or monitoring unit within the structure. As will be readily apparent to those skilled in the art, any of a number of detection devices may be coupled to the detonator 48 to activate the detonator when the overflow valve indicates a hazardous condition within the structure to be relieved.

Referring to FIG. 2, tubular cooling fluid inlet push 52
It can be seen that is arranged within one opening 3o of the tubular body 26. A source of cooling fluid such as water is e.g.
4 to the bushing 52. Similarly, cooling fluid outlet push 5 with tubular connector 58
6 is disposed within the other opening 60 and its connector 58 is attached to a drain line or the like (not shown). It is apparent that each of the apertures 60 communicates with a portion of the conduit 12 between spaced apart frangible diaphragms 14,16. Therefore, cooling fluid can be continuously introduced into this region.

3 to 7 show other embodiments of the invention.

These embodiments are shown schematically and include a first
The same reference numerals are used for the same parts as in the embodiment of FIG. 2 and FIG. Referring first to FIG. 6, a pair of spaced apart diaphragms 60.degree. 62 are used, which diaphragms have a substantially flat shape compared to the irregular shape of members 14.about.16.

FIG. 4 shows a pair of opposing outwardly bent, concave and convex diaphragms 64,66. 1 more
A double-blade knife assembly 68 of conventional construction is disposed within the portion of conduit 12 adjacent and between each of the diaphragms 64, 66. Each of the assemblies 68 includes a plurality of knives that cleanly cut adjacent diaphragms when the diaphragms are cut.

FIG. 5 shows the use of a pair of concave and convex diaphragms 72,74 with a pair of knife assemblies 68. However, in this case each knife assembly is positioned above the diaphragm such that the upper knife assembly 68 is positioned outside the space between the diaphragms.

FIG. 6 shows a construction in which a pair of diaphragms 76, 78 are used with a corresponding knife assembly 68. In this case, the diaphragms 76 and 78 have an uneven shape, but are arranged in such a manner that they bulge toward each other.

Each knife assembly 68 is located outside the area between the diaphragms as shown. Furthermore, the diaphragms 76, 78 are pre-slit (see FIG. 8).

In particular, four orthogonal score lines 80 are provided on adjacent faces of the diaphragm to divide the diaphragm into four sections. The score line 80, along with the cooperating knife assembly 68, can be used to effectively cut the diaphragm 76, 78 upon actuation of the detonator.

FIG. 7 shows a construction substantially identical to that shown in FIG. 5, except that a synthetic resin coating 82 is provided on the lower face of the diaphragm 740 communicating with the tubular member 22. This coating 82 is preferably made of so-called Teflon, and is used when a corrosive material attacks the outer surface of the diaphragm.

FIG. 9 shows a particularly preferred explosive element 84 that can be used in the overflow valve assembly of the present invention. In detail, this element is the outer explosive part 8
8 as well as a central explosive portion 86. These explosive parts preferably consist of one data code material.

lastly.

A synthetic resin sheath 90 is placed around the outer explosive portion 880. Advantageously, the sheath 90 is constructed from a shrinkable polyvinyl chloride material and incorporates a composite structure of elements 84.

In use of pulp assembly 10, the assembly is placed in operative communication with a structure to be protected, such as a high temperature chemical reactor used to process synthetic resin polymers. The tubular member 22 is placed in operative communication with the interior of the reactor, but the diaphragms 14, 16 at all times prevent the flow of material exiting the reactor through the conduit.

Appropriate sensing equipment is provided which selectively monitors hazardous indicating conditions such as temperature and pressure within the reactor.

When a hazardous condition is detected within the reactor, detonator 48 is activated to cause element 18 to explode. A shock wave is then generated in the area between the diaphragms 14 and 16, essentially severing or destroying the double flap diaphragm. This relieves the reactor by passing fluid from the reactor into conduit 12. Important in this regard is that assembly 10 operates in the manner described above without pre-scoring the respective discs. Furthermore, no special structure is required to secure the disks to their actuators. This is an advantage compared to conventional overflow valve units which require special structure to hold the disc in place and prevent excessive rupture.

If the pulp assembly is used for high temperature processes, the pulp can be cooled by continuously circulating a cooling fluid, such as water, through the portion of the pulp between each diaphragm 14,16. As mentioned above, this means connecting the water population and exit lines to the respective connectors 54 and 58.
This is easily achieved by connecting via . Using this type of cooling fluid can prevent diaphragm distortion and/or melting of explosive material.

The operation of the embodiments of FIGS. 3-7 is the same in all respects as described above, except that the different shape and placement of the diaphragm in each embodiment affects the rate and/or type of rupture. be. For example, in the case of FIG. 4, the initiator first causes each diaphragm 64, 66 to bulge outward and then the diaphragms are moved in opposite directions toward each other.

During this movement, it abuts the knife assembly 6'8 and is cut without rupture as described above.

This same operation occurs with the embodiment of FIG. 5, in which the diaphragms 72, 74 first bulge downward;
It then moves upwardly and hits knife assembly 68 .

In FIG. 6, the opposing diaphragms 76 and 78 bulge outwardly upon explosion of the cylinder 44, causing the knife assembly 6 to explode.
8. Those skilled in the art will recognize that a wide variety of other embodiments can be used in addition to those described above. In general, a particular diaphragm shape can be selected according to design requirements.

The overflow pulp assembly according to the invention can also be moved according to the pressure increase within the structure to be protected without activating the detonator.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing the structure of a double-disc overflow valve assembly according to the present invention. FIG. 2 is a similar view of FIG. 3 is a schematic vertical cross-sectional view showing another embodiment of the present invention, FIG. 4 is a schematic vertical cross-sectional view showing another embodiment of the present invention using a member-piercing knife unit, and FIG. 6 is a schematic vertical sectional view showing another embodiment of the invention; FIG. 7 is a schematic vertical sectional view showing another embodiment of the invention; FIG. 8 is a schematic vertical sectional view showing another embodiment of the invention. 6 is a sectional view taken along the line 8-8, and FIG. 9 is an enlarged vertical sectional view showing the structure of a preferred explosive element used in the present invention. 10...Pulp assembly 12...
・Conduit 14.16...Diaphragm 18...
...Explosive element 20...Detonation unit patent applicant Fiku Metal Products Corporation (17)

Claims (1)

What is claimed is: means connected to the structure to be relieved to form a conduit for the flow of material; first and second frangible members; means for mounting within the conduit so as to be spaced apart from one another and to block the flow of material through the conduit; an elongate explosive element; means for attaching it so as to extend across the surface;
means operatively connected to said explosive element and adapted to selectively activate and detonate said first and second frangible members to cause material to flow through said conduit; A double rupture disc overflow pulp assembly, wherein an element is spaced between and relative to the first and second frangible members. 2. The assembly of claim 1, wherein the conduit has a cooling fluid inlet and a cooling fluid outlet communicating with a portion of the conduit between the first and second members. (31) The assembly of claim 1, wherein knife means is disposed adjacent to at least one of the first and second members for passing through the member. (4) The first and second members. (5) At least one of the first and second members has a concave shape. (6) The assembly according to claim 1, wherein at least one of the first and second members has a convex shape. (7) The first and second members (8) An assembly according to claim 1, in which at least one of the first and second members has a cut that weakens it. (8) An assembly in which at least one of the first and second members is coated with a synthetic resin material (9) The assembly of claim 1 in which the explosive element is offset by an elongated cylindrical body disposed transversely to the longitudinal axis of the conduit. 10. The assembly of claim 9 comprising an outer explosive section disposed about said central explosive section and a plastic sheath disposed about said outer explosive section.