DE1233221B - High pressure flange connection with clamp-like clamping segments - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

F161

German KL: 47 F-7/20

Number: 1233 221

File number: L 44128 XII / 47 f

Filing date: February 14, 1963

Opened on: January 26, 1967

The invention relates to a flange connection for high pressure pipes or pressure vessel lids, in which the two flanges to be connected by means of the flanges penetrating connecting screws and clamp-like clamping segments held together are.

The object of the invention is to design a flange connection of this type so that it is once at relatively light structure has only a small footprint and is still suitable for high To be able to absorb and transmit pressures and large bending and axial forces in a sealing manner. aside from that it should be possible to get easy access to the individual parts of the connection and The connection can be made quickly and easily without any major difficulties, even with complex systems to be able to solve and restore.

Flange connections on pipelines are known, in which as connecting elements with Radial projections in corresponding radial grooves on the face of the pipe flanges engaging clamps are provided. The connection is only sealed between the clamping hammers and the pipe flanges, since the pipe ends or the flanges themselves do not have a sealing contact enter into each other. Despite a sliding sleeve encompassing the flanges and the clamps if this connection is not suitable because of the clearance between the pipe ends, sealingly high To absorb pressures, large axial forces and, above all, high bending loads. This sleeve not only makes it difficult to access the clamps, but it also possibly leaves them on the brackets do not recognize any damage.

Furthermore, a flange connection is known in which tension clamps and tension screws together Find use, wherein the clamps are flange-like extensions or beads of the to be connected include flanged parts from the outside and by additional radially extending clamping screws be clamped on these approaches. Since the mentioned approaches or beads in this case on the the connecting flanges must be arranged on the opposite side of the parts to be connected It is not possible to use it on pipe sections or pressure vessel covers, quite apart from that from the fact that it is difficult or practically impossible to establish a tight connection between the two of each other to achieve opposite flanges. A particular disadvantage, however, is the inaccessibility too the tension clamps, the awkwardness of assembling and loosening the parts and the impossible high-pressure flange connection with clamp-like clamping segments

Applicant:

Lummus Nederland N.V., The Hague

Representative:

Dr.-Ing. H. Fincke, Dipl.-Ing. H. Bohr
and Dipl.-Ing. S. Staeger, patent attorneys,
Munich 5, Müllerstr. 31

Named as inventor:

Djin Kian Oey, Rijswijk (Netherlands)

Claimed priority:

Netherlands of February 16, 1962 (274 936) - -

to be able to easily recognize the possibility of damage, breaks and the like on the clamps.

As far as one can already use the Brackets divided into segments, there are again the disadvantages that when relatively entangled structure of the connection of screw flanges and wedge-like clamps high axial and bending loads are not guaranteed, especially since the connecting screws have the usual relatively large radial distance from the pipe axis.

In contrast, the invention now proposes that in the flange connection mentioned at the outset each of the two flanges in a manner known per se on the face side from the flange circumference to over the connecting screw holes In addition, an annular recess extending radially inwards with a flat base and one adjacent to this base Has annular groove in its otherwise cylindrical inner wall, so that the recesses when abutting Flanges together form an annular space with a U-shaped cross-section, in the segments of a clamp ring of accordingly U-shaped cross-section and at least one through hole for erne the flange connection screws are inserted appropriately in each segment.

This avoids the disadvantages of the known embodiments listed above, since the segments of the clamp ring are free of play within the pitch circle of the connecting

609 759/200

Claims (1)

3 4 screws are located. The radial spacing of these at least three such segments is provided from the central axis of the pipeline to enable the assembly of the flange connection or the pressure vessel is therefore less than that in the following way:
Radius of the pitch circle. The flanges are therefore first of all exposed to the two flanges 3, 4 under a lower bending load. Also 5 interposition of the sealing ring 12 with their forehead need the connecting screws no longer the surfaces 11 placed against one another. Then the bolts will absorb high operating pressure. The entire binding 14 is carried out through the holes 13 and the courage binding can be tightened so that it is smaller and lighter than the tern 14 '. Thereafter, one of the bolts 14 will be, and fewer or thinner connections can be removed and one of the segments 15 binding screws can be used at this point. In addition, the flanges 3, 4 are introduced radially into the U-shaped annular space between the two which form the entire U-shaped annular space. Thereafter, the clamp bolt 14 filling between the two flanges is again inserted into the associated Schraumer rings with the flanges of a compact bending hole and its nuts 14 'become a rigid block. dressed. In the same way, the rest of the Finally, since the segments of the clamp ring 15 segments 15 are inserted one after the other into the annular space between the flanges 3, 4 inserted from the outer circumference of the connection and used against a radial one, there is a slight shift together by the respective bolts 14 set or disassembled Connection secure. During operation, the are on the flange distributors. At all times, even for high pressures under all axial forces acting on the binding, a good seal is taken up on the segments LS, essentially by operating conditions. The screws 14 junction ensured. serve mainly to the sealing ring 12 during In the schematic drawings, two parts of the assembly of the coupling are to be put together. exemplary embodiments of the invention shown. It shows pressing and then a radial shifting of the F i g. 1 to prevent a flange connection segments 15 according to the invention. Number and diameter in radial section, 25 of the screws 15 therefore only need to be F i g. 2 on a reduced scale, a cross-section would take the resulting small to be dimensioned according to claims by the connection according to FIG. Another Line H-II, and reducing the number or diameter of the Fig. 3 a radial section through a further screw is possible if for the assembly Embodiment of the flange 30 according to the invention press the flanges when assembling the segments link. Screw clamps that can be placed on the side of the flanges The F i g. 1 and 2 show a flange connection can be used. of two sections 1 and 2 of a high pressure pipe F i g. 3 shows a flange piping according to the invention. Each of these sections has a connection for attaching a cover to one welded flange 3 or 4, each with a 35 pressure vessel. The pressure vessel 22 is with a annular, end face provided from the flange circumference to flange 23, which has an end face ring over Connecting screw holes 13 also have a radially shaped recess with a flat, extending from inwardly reaching recesses are provided. Flange circumference beyond tapped holes 25 Adjacent to the flat base surfaces 5 and 6, the base surface 5 extends radially inward on this Recesses are each an annular groove 7 or 8 40 has. Adjacent to this base area 5 runs a provided of rectangular cross-section. In addition to the annular groove 7, so that on the flange 23 a radially vorRingnuten 7 and 8 respectively remain ring-shaped and standing edge section 9 remains. The decradial outwardly protruding edge portions 9 angle 24 is with a corresponding recess or 10 of the flanges. The two flanges 3, 4 of a flat base 6, annular groove 8 and edge and their recesses are sized exactly the same. 45 section 10 provided. In the one between the reason-ifs According to FIG. 1, the two flanges 3, 4 with surfaces 5 and 6 enclosed U-shaped rings end-face annular surfaces 11 lie against one another, space is in turn a number of ring segments then form the two recesses of the 15 arranged, which with their inwardly protruding Flanges 3, 4 together engage in cross-section edge portions 16 in the grooves 7 and 8 U-shaped annular space, which to the peripheral surface 50 and the flange 23 with the cover 24 in one place both flanges 3.4 is open. Hold in the ring, in which the sealing ring 12 between surfaces 11 are annular grooves for receiving one of the adjacent end face parts of common sealing ring 12 is provided. The flange 23 and cover 24 are held pressed together Flanges 3, 4 are through eight connecting bolts. In the threaded bores 25 are connecting 14 connected with nuts 14 '. 55 screws 26 inserted. These occur through the One of eight identical segments 15 through holes in the segments 15 and in the existing clamp ring of the said ring flange portion of the cover 24 and carry space-corresponding U-cross section fits in nuts 26 '. The flange connection according to FIG. 3, the annular space between the flanges 3, 4 a, is produced in the same way as it is set up, with each individual ring segment 15 au 60 starting radially towards its two outer sides for the example according to FIGS. 1 and 2 has been explained inside,
has standing edge portions 16 and with a claim:
Through hole 17 is provided for each one of the screws 14. The edge sections 16 of the segments 15 flange connection for high-pressure pipes or engage with a snug fit in the annular grooves 7 and 8, such as 65 pressure vessel cover, in which the two to verdass each segment 15 exactly between the end-side binding flanges by means of the flanges through the base surfaces 5 and 6 of the flange recesses Connecting screws and clamp is fitted. To form the clamp ring, similar clamping segments should be held together,