JPS6344998B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a joint for simultaneously connecting a plurality of pipes that are provided symmetrically and close to each other with respect to the center, the joint having a pair of bushes and a bush at the ends of the pipes to be connected. A plug-in part is provided, and these bushings and plug-in parts relate to such a joint that, when pressed into each other, they are made gas-tight by means of two loose flanges that can be tightened together with a conical gas-tight surface.

A plurality of pipes located in an extremely narrow space must be connected remotely using this type of pipe joint. Such connections are particularly found in so-called radioactive material handling rooms of nuclear installations, where a large number of pipes have to be connected to various miscellaneous vessels.

The known multiple joints are very expensive and require the use of auxiliary hoists and manipulators.

The object of the invention is to make a pipe coupling of the type described above so that it can be handled remotely as easily as possible. In this case, the aim is to make the pipe joint as compact as possible so that it can be handled even between pipe bundles that are close to each other. Furthermore, all of the coupling elements can be replaced by remote control, and of course the aim is to improve the airtightness between the ends of the pipes to be connected.

According to the invention, this object is achieved by: (a) each flange having a longitudinally segmented structure, and (b) each of these flanges consisting of a pressure plate with play and a centering plate with play. (c) the pressure plate has an opening on its circumference that opens toward the circumference corresponding to the number and arrangement of the pipes, and the centering plate similarly has an opening corresponding to the number and arrangement of the pipes; (d) the bush and the insert each have an annular band; (e) the diameter of the annular band is greater than the diameter of the opening in the pressure plate; (f) the centering plate; (g) the centering plate is inserted onto the bushing or insert from the pipe end or the center of the fitting; screwed onto a pressure plate which can be inserted from the pipe side onto the pipe through an opening, in which case the pressure plate abuts the annular band when viewed from the center of the joint, and (h) the pressure plate and the centering plate are The flange of the formed split structure is adapted to be tightened to the extension by rotating a connecting bolt provided at the center or central axis between the pipes, and (i) the connecting bolt is The end opposite to the extension has a male thread corresponding to the central female thread of the pressure plate, and this male thread is followed in the direction of the extension by a cut-out recess of a small diameter and a step of a large diameter. It is achieved by doing so.

The pipe joint according to the present invention has the advantage that three or more pipes can be simultaneously connected to each other in an airtight manner. The construction of the pipe coupling according to the invention is then made up of structural parts that are inexpensive to produce, simple components, and whose interchangeability is always guaranteed. The inventive fitting, which operates without special packing, can be employed in any medium and can be made from a wide variety of materials. A further advantage of the invention is that individual pipes can be prefabricated and fitted without being hindered by flange parts.

The present invention will be described in detail below based on embodiments shown in the drawings.

Three or more pipes 6 arranged concentrically around the central axis 5 must be connected to each other by joints. At each end of the pipe 6 which abuts against each other, a corresponding bush or conical receptacle 7 and a conical insert 8 are provided in a gas-tight manner. The conical receptacle 7 and the conical insert 8 are pressed together and are sealed to each other by their conical surfaces or similar sealing surfaces 9. Each of the conical receptacles 7 and the conical inserts 8 is fitted with an annular band 12, which is applied with a clamping force in order to make it airtight.

The tightening is performed by tightening the two flanges 10, 11 together. Each of these flanges 10, 11 is divided in the axial direction and therefore consists of two flange halves. One flange 10 has a conical socket 7
The other flange 11 consists of a pressure plate 2 and a centering plate 4 for the conical insert 8. The pressure plate 1 is screwed to the centering plate 3 by bolts 13, the pressure plate 1 and the centering plate 3 being centered with respect to each other by means of a collar 14. The other pressure plate 2
is mirror-symmetrical with respect to the pressure plate 1, and is similarly centered and screwed to the centering plate 4 by bolts 15 and collars 16.

Each of the pressure plates 1, 2 together with their associated centering plates 3, 4 grip the annular band 12, so that each annular band 12 has a radial play in its flanges 10, 11. , is restrained against axial movement. This restraint is achieved by providing approximately semicircular openings 17 on the circumferences of the pressure plates 1 and 2. These openings 17 correspond to the number and arrangement of the pipes 6, and their diameter 18 is somewhat smaller than the diameter of the annular band 12 (see FIG. 2). The diameter and thickness of the pressure plates 1, 2 are determined in such a way that the pressure plates 1, 2 can be inserted between the pipes 6 and then turned over and placed in a position perpendicular to the pipes 6. From the other side, the annular band 12 is inserted through the hole 19 and fixed by a collar 20 on the side of the pipe end.

Both flanges 10, 11 are tightened together by a connecting bolt 21.
has a head 22 which can be driven by a manipulator at one rear end of the extension 32 and a screw 23 at the other end. A cutting recess 24 is provided between this screw 23 and the shaft portion 32 of the connecting bolt. The cut recess 24 ends at a step 25 relative to the shaft 32.

The connecting bolt 21 has its male thread 23 screwed into female threads 26 and 27 provided at the center of the pressure plates 1 and 2, and is passed through the center through hole 30 of the pressure plates.
Therefore, the connecting bolt 21 remains in the thread 26 of one pressure plate 1 , and the other pressure plate 2 is located above the cut-out recess 24 and in contact with the step 25 . Therefore, when fixing the pressure plates 1, 2 or the flanges 10, 11, they are tightened together until the conical air-tight surfaces 9 are pressed against each other and are sufficiently air-tight. A short index pin 28 and a long index pin 29 are then used for precise positioning of the joint parts (see FIG. 3).

Assembly of the joint is carried out as follows.

First, the pressure plate 1 and the centering plate 3 are each inserted onto the annular band 12 of one pipe bundle from the side of the pipe 6 or from the side of the joint center 31. This takes place despite the large diameter of the annular band 12. This is because the opening 17 is not a hole but a slit facing outward (second
figure). After that, the pressure plate 1 and the centering plate 3 are attached with bolts 13.
are screwed to each other in this manner to form a rigid annular band 12.
can be attached to. The same thing is then done with the pressure plate 2 and the centering plate 4 of the other pipe bundle, which produces the flanges to be replaced, which are not shown in detail. Then both flanges 10, 11, each consisting of parts 1, 3 or 2, 4,
The conical insert 8 and the conical receptacle 7 are placed opposite each other until they protrude and are mutually centered. Finally, the back bolt 21 is screwed in from one side or from the appropriate side by means of internal threads 26 and 27 until a sufficient tightness is achieved with the screw to provide the desired pressing force.

The tightness of the conical sealing surface is then ensured by the following measures.

Unavoidable dimensional deviations in the axial direction are compensated for by the three-point arrangement itself, so that all connections produce the same pressing force.

The conical surface of the pipe end provides a possibility of movement in the radial direction, resulting in a self-centering effect.

The conical insert 8 ends with a conical surface that is steeper by 2° than the conical receptacle 7.

In order to prevent the connection bolts 21 from coming off, a set screw is provided on the pressure plate on each bolt side.
With this set screw, the connecting bolt 21 can also be used to release the connection. For this purpose, an intermediate plate is placed in the joint center 31 between the two flanges 10, 11 in front of the central hole.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a pipe joint according to the present invention, and FIG.
The figure is a sectional view taken along line A-B in Figure 1,
The figure is a sectional view taken along line CD in FIG. 2. 1, 2... Pressure plate, 3, 4... Centering plate, 5...
...Central axis, 6...Piping, 7...Conical socket, 8...Conical insert part, 10,
11... Flange, 12... Annular band, 17... Opening, 21... Connection bolt, 22... Bolt head,
23... Male thread, 24... Cutting recess, 25... Step, 26, 27... Female thread, 31... Joint center.

Claims (1)

[Claims] 1. A joint for simultaneously connecting a plurality of pipes that are arranged symmetrically and close to each other with respect to the center, wherein a pair of bushes and an insert part are provided at the ends of the pipes to be connected. and these bushings and inserts, when pressed together, are made airtight by two loose flanges that can be tightened together with a conical airtight surface, (a) each flange 10, 11 is (b) Each of these flanges 10, 11 has a pressure plate 1, 2 with play and a centering plate 3, 4 with play.
(c) The pressure plates 1 and 2 have openings 17 on their circumferences that are open toward the circumference in accordance with the number of pipes 6 and the pipe structure, and the centering plates 3 , 4 likewise have holes 19 corresponding to the number and arrangement of the pipes 6, (d) the bushing 7 and the insert 8 each have an annular strip 12, and (e) the diameter of the annular strip 12. is the opening 17 of the pressure plates 1 and 2.
(f) The hole 19 in the centering plates 3, 4 serves as a stop for the annular band 12 of the bush 7 and the insert 8, and the collar 2 is oriented towards the pipe side.
(g) The centering plates 3 and 4 are located at the end of the pipe or at the center of the joint 3.
1 onto the bush 7 or insert part 8, and an opening 17 is inserted from the piping side onto the piping 6.
(h) centering with the pressure plates 1, 2; The flanges 10 and 11 of the split structure formed from the plates 3 and 4 are tightened to the extension portion 32 by rotating the connecting bolt 21 provided at the center between the pipes or at the center of the central axis 5. (i) The connecting bolt 21 has a male thread 23 at the end opposite to the extension part 32, which corresponds to the female threads 26 and 27 at the center of the pressure plates 1 and 2, and this male thread 23 has an extension part. A pipe joint for simultaneously connecting a plurality of pipes that are close to each other, characterized in that a small-diameter cut-out recess 24 and a large-diameter step 25 continue in the direction of 32.