SU734472A1 - Flange connection and method of connecting flanges - Google Patents

Description

The invention relates to general engineering. The flange connection is known in the form of welded or overlapped flanges with round, oval or polygonal profiles. Regardless of the presence of connecting protrusions (spikes, grooves), as well as sealing gaskets, flanges are provided with round mounting holes for bolts or studs with rigid cores 1. The mounting holes of such a profile substantially weaken the flanges, reducing their rigidity, which is often the cause of loosening. The offset of the axes of the bolt or pin holes in the flanges is compensated by the difference between the diameters of the drills for making the holes and the core of the fastener or by improving the accuracy of marking and manufacturing. The uneven distribution of bolts or studs around the circumference of their axes, as well as the unevenness (prior or acquired during operation) of tightening, reduces the density of the joint surfaces. It is also known to have a flange joint containing flexible cores placed in the through holes of the flanges, each of which consists of a bundle of wires and has tensioning and locking threaded bushings and nuts at the ends, and a method of connecting the flanges, including the installation of cores in the holes of the flanges and tensioners. and locking the cores by tightening the sleeves and nuts 2. However, this connection also has disadvantages. Round openings for cores, the axes of which are distant from the outer perimeter of the flanges, reduce the rigidity of the latter. Simultaneous tensioning of all wires of a flexible core is difficult and requires the use of complex devices. Due to the different wire lengths, it is difficult to achieve uniform distribution of the tensile force in the wires. The considerable stiffness of the core, especially from thick wires, makes it difficult to pull it through the round holes of the flanges. The purpose of the invention is to increase reliability while ensuring uniform distribution of the load on the fastening means. This goal has been achieved due to the fact that the fastener is made in the form of one

continuous wire, which is consistently located in the through open peripheral grooves of the flanges and covers the outside areas of the flanges between the through openings, forming layers of winding, the number of which is mostly even, and the tension and stop devices are made, for example, in the form of two pairs of rods, each of which of two sections eccentric to each other, with one section of the rod placed in the socket, made on the flange, and on the other section fixed end of the wire.

The method of flange connection consists in fixing one end of the wire to the eccentric rods before mounting, then mounting the wire on the flanges, sequentially placing it in the open grooves of the flanges and surrounding the flanges between the grooves with simultaneous tension of the wire, and fixing the other the end of the wire on the other pair of rods, after which the wire is further tensioned and its ends are locked by twisting the rods.

FIG. 1 depicts the described connection with an even and odd number of grooves on the flanges; in fig. 2 — node A in FIG. one; in fig. 3 is a view B in FIG. 2. The flanges 1 are made with peripheral open grooves 2, the number of which can be even (see Fig. 1a) or odd (see Fig. 16).

The fastener-wire 3 is first fastened to a pair of rods 4 and 5, each of which has eccentric sections 6 and 7 installed in the grooves of the flanges.

Fastening the end of the wire can be accomplished by winding around the rods with a figure eight. Then the wire is mounted on the flanges, sequentially positioning it in the grooves of the flanges and covering the outside areas of the flanges between the grooves with simultaneous tension.

Thereafter, the other end of the wire is fixed to another pair of eccentric rods (not shown in the drawing} and additional tension and locking of the ends of the wire is performed by turning the eccentric rods.

By varying the tension of the layers of the wire winding, uniform crimping and better compaction in the working condition between the flanges are provided.

Claims (2)

Invention Formula L A flange connection comprising a wire fastener placed in the through openings of the flanges, a tension and a locking device, characterized in that, in order to increase reliability by ensuring uniform distribution of the load, the fastening means is made predominantly of continuous wire which is sequentially arranged in the through openings flanges and covers the outside areas of the flanges between the through openings, forming layers of winding, with the through openings of the flanges made in the form of open gear malarial slots 0 and the tensioning and locking means are arranged in the form of two pairs of rods, each of which consists of two sections, eccentric to each other, wherein one shaft portion is situated in the nest, taken in the flange and the second winding portion is fixed layer. 2. A method of connecting flanges, comprising mounting the wire on the flanges, tensioning and locking the wire, characterized in that one end of the wire is fixed in eccentric rods before mounting, then the wire is mounted on the flanges, sequentially positioning it in the open grooves of the flanges and covering the areas of the grooves between the grooves with simultaneous tension of the wire, and fix the other end of the wire on the second pair of eccentric rods, after which additional tension of the wire and the stopper are performed of its ends, by rotating the eccentric 0 rods. Sources of information taken into account in the examination 1. Voloshin A. A. and Grigoriev P. T. Calculation and design of flange connections. L., “Mechanical Engineering, 1972. S 2. USSR Author's Certificate No. 265618, cl. F 16 B 2/06, 1968 (prototype).