SK71999A3 - Safety device for damping or preventing the movements of a broken section of a piping system - Google Patents

Abstract

A safety device is disclosed for damping or preventing the movements of a broken section of a piping system (1). In a first embodiment, at least two stiff or deformable traction bars (5) bridge a possible breaking point (2) so as to prevent it from breaking. In another embodiment, a part of the piping system (1) is supported by a buttress (7) at a branch (6) or fitting housing so as to prevent it from breaking. The branch (6) is further joined to the buttress (7) by at least two deformable traction bars (5), in particular a deformable hoop (11).

Description

Pivotable fuse to dampen or prevent movement of a broken pipe section

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a pivotable fuse for damping or preventing movement of a broken pipe section.

BACKGROUND OF THE INVENTION

In industrial plants, for example also in power plants, pipelines are used through which the medium flows under high pressure. In the event that such a pipeline would burst, both parts of the pipeline could be thrown at a correspondingly high velocity apart at high velocity due to the rebound of the medium blasted at high speed. It would then be possible that parts of the pipeline would be damaged if they hit other pipelines and components.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a pivoting safety device which, upon rupture of a pipe, prevents parts of the pipe from impacting and damaging parts of the apparatus at high speed.

According to a first embodiment of the invention, the problem is solved by bridging at least two rigid or deformable tensile bars which connect the possible breakage points to the pipe on both sides.

This has the advantage that after the pipe rupture the pipe parts are held firmly by the drawn rods and / or the deformation of the drawn rods removes the kinetic energy of the pipe parts and thus the force in the drawn rods is limited. The dynamic load factor is clearly less than 2. The pipe parts move only slightly from the break point.

In most cases, it is sufficient for such pivoting fuses to be placed on known, particularly endangered pipe sections. For example, the drawn rods may be attached to portions that are welded to the pipe on both sides of a possible breaking point.

According to a particularly preferred embodiment of the example, the drawn rods are connected to the pipeline cardanically. This has the advantage that forces that do not act axially on the pipe section can also be damped. The pipeline parts can be stabilized in the axial position.

For example, the tensile bars are connected at least on one side of a possible breaking point to a rocker (e.g. cardanic) which is movably mounted on a cam, for example a circular cam, and is rotatable about it. The cam is firmly connected to the pipe. For example, it can be subsequently welded. The rocker arm is also mounted on the cam after the deflection, and even after the pipe breakage, always in balance. It also compensates for the different elongation of the engaging tensile bars.

The drawn rods are connected in particular to a pair of rocker arms, the rocker arms of which are mounted on the pipeline with respect to each other on separate cams. The drawn bars may be cardanically connected to one or both rocker arms. They can also be placed on both sides of a possible breaking point.

According to another example, the drawn rods are connected to a support which supports the pipe in the direction of a possible break point on the distributor member. Such a positioning is only possible if there is such a distribution member near the predicted breaking point.

According to a second embodiment, the object is solved in such a way that the part to be broken is supported on the distributor member or on the valve body and is connected to the support by at least two rigid or deformable drawn rods.

In this way, only two adjacent break points cannot be braked or even tightly restrained. A second equal fuse is required at the adjacent break point.

The drawn rods are disposed, for example, at an angle to the pipe sections extending from the distributor member or from the valve body. They can also be placed at an angle to the axis of the valve body. The advantage is achieved that the tension rods are damped force components in the direction of the axes of all these pipe sections and the valve body. Pipe bursts in each section are also handled.

For example, in the region of the manifold member or body of the armature, the part to be broken is surrounded by a rigid or deformable yoke, the arms of which are both rigid or deformable tensile bars. By this measure, no fixing means is required on this part of the pipe.

Deformable flexible tubes may be placed between the support and the duct. These elastic tubes, like deformable drawn rods, preferably receive kinetic energy. The flexible tubes may be parts of the sliding bearing used anyway.

There are articulated struts between the support and the building structure. Thus, in addition to the optimal way the forces can be placed on the structure of the building.

In particular, the pivoting fuse according to the invention achieves the advantage that the broken pieces remain in their original position after the pipe rupture. They cannot fly off as a result of kickback and cause further damage.

BRIEF DESCRIPTION OF THE DRAWINGS

The three variations of the pivoting lock according to the invention are explained in more detail below with reference to the drawings, in which:

Fig. 1 shows a pivot lock according to the invention in which the breaking point can be bridged;

Fig. 2 shows a pivoting safety device according to the invention, in which the breaking point can be bridged and part of the pipe is supported on the support;

Fig. 3 shows a pivot lock according to the invention according to which a portion of the pipe is surrounded by a deformable yoke and supported on a support.

DETAILED DESCRIPTION OF THE INVENTION

Fig. 1 shows the pipeline 1 with the break point 2. If the medium is contained in the pipeline 1 under high pressure and if there is a break of the pipeline 1, then at the break point 2 the medium is ejected at high speed. This would cause a stroke of part of the pipe 1 to be kicked back, whereby this could be plucked from its holders. In equipment with piping 1, the bursting of the pipeline may result in further fatal damage.

If there is a known location on the duct 1 where an average probability of breakage can occur, then it is preferable to place there a swinging fuse shown in FIG. Such a location may be, for example, a weld seam.

The rocker shown in FIG. 1 consists, inter alia, of a cam 2, for example a circular cam, which is designed on the pipe 1 above and below the breaking point 2. · Opposite each cam 3 shown there are two more cams (not shown) 2 4. The cam 2 engages in the rocker bore

4. There are usually four rocker arms 4 of which only two are visible. The pair of rocker arms 4, located on one side of the break point 2, is connected to a pair of rocker arms 4 on the other side of the break point 2 by means of two deformable pull bars 5. The two deformable pull bars 5 are opposite to each other. with a pair of rocker arms 4. connected cardanically.

Should the pipe 1 break between the two pairs of rocker arms 4, although the medium will be ejected from the pipe 1, the resulting kickback will not result in any consequential damage. In fact, the kinetic energy of the parts of the pipeline which is converted into a kickback causes plastic deformation of the deformable drawn rods 5, which at the same time hold the parts of the pipe in their original position, while limiting the forces in the drawn rods.

Fig. 2 shows a manifold member 6 of a pipe 1 from which a portion of the pipe extends upwards in the drawing and two pipe parts extend perpendicular to the drawing. On the upstream portions of the pipe corresponding to the upper part of FIG. 1, two cams 3, two rocker arms 4 and two deformable tension rods 5 are arranged. The tension rods 5 are connected to the rocker arms 4 in a completely cardanic manner, so that non-axial movements of the pipe 1 can also be damped. with a support 7. The support 7 is located below the manifold member 6 and supports the manifold member 6 and other piping.

Upon rupture of pipe 1 at the break point 2, the top of pipe 1, as in the embodiment of FIG. 1, held by deformable tensile bars 5. The lower part of the pipe 1 with the splitting member 6 is prevented by the support 7 from flying away due to the kickback. Between the support 7 and the manifold member 6 of the conduit 1, according to FIG. These flexible tubes 8 may be part of the plain bearing. The role of the flexible tube 8 in relation to the pivoting fuse is that after breaking of the pipe 1 the kinetic energy of the lower part of the pipe 1 compresses the flexible pipe 8 so that no greater movement of the bottom part is possible. Between the support 7 and the structure of the building 10, articulated struts 9 or rigid building elements or combinations of both can be placed on the structure of the building to absorb external forces.

The embodiment of the pivoting lock according to FIG. 2 is applicable in the region of the distributor member 6.

The mutually opposing forces acting upon the pipe interruption on both its parts are transmitted on the one hand by the drawn rods 5 and on the other by the flexible tubes 8 to the same support 7. The forces are limited by the plastic deformations of the drawn rods 5 and the flexible tubes 8. upstream, the forces transmitted from the support 7 to the structure of the building 10 are relatively small.

Fig. 3 shows another embodiment of the pivoting fuse according to the invention, which can be mounted on the distributor members but also on the valve bodies. Here, as shown in FIG. 2, a manifold member 6 or a valve body supported on the support 7. A flexible tube 8 is disposed between the support 7 and the manifold member 6 or the valve body. In addition, articulated struts 9 are disposed between the structure of the building 10 and the support 7.

A deformable yoke is disposed in the inner curvature of the distributor member 6 or the valve body

11. the arm of which extends approximately in the direction of the axis of the angle which grips the axes of the two portions of the pipe extending from the distributor member 6. The deformable yoke 11 corresponds in its properties to the deformable tensile bars 5. .

By means of the deformable yoke 11, the force components push the manifold member 6 or the valve body against the flexible tube 8 and thus against the support 7. Other force components prevent the manifold member 6 or the valve body from moving too far along the path in the drawing to the left. In this way the breaks up and to the right of the manifold member 6 or the valve body are managed.

In order to be able to handle breaks in the pipeline to the left of the manifold member 6 or the valve body, a second deformable caliper, not shown, would need to be mirror-symmetrically positioned on the caliper 11 shown, the plane of symmetry extending perpendicular to the drawing along the axis of the upward pipeline.

By means of the pivoting fuse according to the invention, the broken portions of the pressure line can be reliably locked in their original position.

Instead of deformable drawn rods 5, rigid drawn rods may also be used.

Claims (10)

1. A pivotable fuse for damping or preventing movement of a fractured part of a pipe (1), wherein the predicted possible breaking point (2) is bridged by a connecting element, characterized by the at least drawn bars (5) being located, and that . in that, as a connecting element, two rigid or deformable tensile bars (5) are cardanically connected to each other (2) A pivotable fuse for damping or preventing movement of a fractured part of a pipe (1), the predicted possible breaking point (2) being bridged by a connecting element, characterized in that at least two rigid or deformable drawn rods (5) are provided as connecting element; and that the drawn rods (5) are connected on one hand to the pipe (1) and on the other hand to a support (7) which supports the pipe (1) in the direction of the possible breaking point (2) on the distributor member (6). Pivotable fuse according to claim 2, characterized in that the drawn rods (5) are cardanically connected to the pipe (1). Pivotable fuse according to one of Claims 1 to 3, characterized in that the drawn rods (5) are connected to at least one rocker (4) which is movably mounted on a cam (3) which is fixedly connected to the pipe (1). ). 5. Pivotable fuse for damping or preventing movement of a broken pipe section (1), characterized by: 4 / characterized in that the part to be broken is supported on the distributor member (6) or on the valve body by a support (7) and connected to the support (7) by at least two rigid or deformable drawn rods. The pivotable fuse according to claim 5, characterized in that the drawn rods are disposed obliquely on the axis of the pipe sections extending from the manifold (6) or from the valve body. The pivotable fuse according to any one of claims 5 or 6, characterized in that the part of which the manifold member or the valve body is surrounded by a rigid or deformable yoke (11), the arms of which consist of both rigid or deformable drawn rods (5). Pivotable fuse according to one of Claims 2 to 7, characterized in that deformable flexible tubes (8) are arranged between the support (7) and the pipe (1). Pivotable fuse according to claim 8, characterized in that the flexible tubes (8) are parts of the plain bearing. Pivot lock according to one of Claims 2 to 9, characterized in that articulated struts (9) are arranged between the support (7) and the building structure (10).