FI88645C - Pipe connection, method of connecting the pipe connection with the container and tools for applying the method - Google Patents

Description

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Putkivhde. The present invention relates to a pipe connection connected to a pressure-resistant container of flexible material for conducting a pressurized gas or liquid to a container, wherein the edges of an opening in the container material are fitted with two flanges pressed against each other. the second flange is integral with the tube and the second flange is provided with 10 collar portions surrounding the tube. The invention also relates to a method of connecting a pipe connection to a pressure-resistant container of flexible material, wherein the edges of an opening in the container material are fitted between two flanges surrounding the pipe and the flanges are pressed towards each other, and using a pipe with one flange and a second collar. , which is pressed with the tube towards one flange. The invention further relates to a tool for connecting a pipe connection to a pressure-resistant container of flexible material.

A rotating drum washer in a pressurized state is used to wash or thicken the cellulosic fibrous slurry or the like. Prior to the point of disassembly of the pulp web, a sealing member can be used in the scrubber to separate the pressurized space inside the hood from the point of disassembly. As a sealing member; 25 may be a tubular bag made of a flexible material, e.g. a plastic film, filled with a pressurized liquid or gas. To introduce the pressurized gas into the bag, the bag is provided with pipe connections tightly connected to it.

: 30 The connectors are made of special acid-resistant metals.

In the past, the connection has been achieved by two rings arranged around the tube, against the annular protrusion at the end of the tube, between which the edges of the opening in the bag are arranged. There have been threads and rings on the outer surface of the pipe ... · 35 the annular protrusion of the pipe and against each other have been pressed against each other by means of a locknut with an internal thread on the pipe. However, machining threads into an acid-resistant material is difficult. In addition, under severe corrosion conditions, tightness has been a problem because mounting errors 383845 have damaged the base material when tightening the locknut. The materials are damaged so that the threads can no longer be opened later for bag replacement. Installation has required work on both sides of the material to be sealed.

The pipe connection according to the present invention is characterized in that the second flange is locked in place by welding its collar part to the pipe. The method according to the invention is characterized in that the collared flange is locked in place by welding its collar to the pipe. The tool according to the invention is characterized in that the tool comprises a body part to be fitted through the pipe joint, a abutment surface to be fitted against a flange integrally with the pipe joint, a tubular pusher to be fitted against the pipe flange 15 and a tightening member to push the pusher towards the abutment surface.

In the pipe connection according to the invention, ready-made standard pipe sections can be used without threaded connections. The one is suitable for use in situations where a short installation time and ease of installation are important. To replace the sealing bag, the connections are easily removed from the bag by opening the spot welded joints. The joint according to the invention is suitable for bag materials which cannot be welded or glued. If necessary, one can be mounted on the elastic material by working on only one side of the bag material. There are no installation parts in the pipe that impede the flow and reduce the cross-section of the pipe.

The invention and its details will be described in more detail below with reference to the accompanying drawings, in which Figure 1 shows a cross-section of a pressure washer, Figure 2 shows an enlarged detail of Figure 1, Figure 3 is an exploded perspective view showing the sealing element shown in Figure 2, Figure 4 shows a section of the invention. seal-35 te-element pipe connection, Fig. 5 shows a tool for installing a pipe connection according to the invention and Fig. 6 shows the tool of Fig. 5 fitted to a pipe connection.

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Figure 1 shows a pressure washer known per se. The washer tank 1 in the direction of arrow A rotary suodinrumpu 2. Pool the upper side is closed by a hood 3. The fiber slurry supplied to the surface of the drum 4. The feed portion of the hood within also Lella 5-3 prevailing overpressure to press the slurry through the liquid filter surface of the drum 2 interior of the drum from which filtrate is removed. The pulp track 6 is removed from the drum with a scraper 5.

In order to maintain a higher pressure in the space 20 inside the hood above the drum than in the ir-10 at the race point 5, a sealing element 8 is arranged between the wall 7 above the release point and the drum. The sealing element 8 is made of a flexible film, e.g. plastic film or plasticized fabric. a tubular member extending the entire length of the drum. The sealing element 15 or the sealing bag 8 is filled with a pressurized liquid and / or gas, the bag being pressed tightly against the surface of the drum, isolating the pressurized space 20 inside the hood 3 from the lower pressure pulp release point 5.

In order to conduct the liquid and gas into the sealing bag, the bag 20 is provided with metal pipe pairs 9 and 10 arranged along its entire length.

Figure 4 shows a method according to the invention for connecting pipe joints 9 or 10 to a sealing bag 8. The extension of the pipe 9 or 10 is a flange 11 in one piece with the pipe. The second flange 12 is provided with a cylindrical collar 19 with an inner diameter corresponding to the pipe 9. or 10 outer diameters. Thus, the flange 12 can be arranged around the pipe 9, on top of the flange 11. The edges of the opening in the sealing bag 8 are arranged between the flanges 11 and 12 together. 30 with vist rings 13. The flanges are pressed tightly against each other and the flange 12 is locked in place by welding the collar 19 to the outer surface of the tube 9, 10 by spot welding 14 '.

Figures 5 and 6 show a tool by means of which the pipe connection according to the invention can be easily manufactured. The tool bone includes a bolt 14 having threaded nuts 15, 15 'at each end, two abutment rings 16, 16' and a tubular portion 17 therebetween having a notch 18 at one end.

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A tube 9 or 10 with flanges 11 and seals 13 is fitted to the abutment surface 16 at the lower end of the bolt 14. The bolt is inserted through the opening of the bag 8 and the collared flange 12 is placed on the tube 9 or 10. The tubular part 17 of the tool is then fitted against the upper edge of the flange 12 . A stop ring 16 'is placed on the tubular part 17 and the flange 12 can be pressed with sufficient compressive force towards the flange 11 by tightening the bolt 15'. The collar 19 of the flange 12 is locked to the pipe 9, 10 by spot welds 14 'through the notches 18. There are, for example, 3 notches (120 ° pitch), so welding can be done during the same tightening-fixing phase without removing the tool.

The invention is not limited to the above application, but may vary in various ways within the scope of claims 15. The sealing ring 13 is not necessary if the material of the bag 8 is thick and flexible enough to act as a seal. The clamping force during installation can be provided in any other way than with the tool of Figures 5 and 6. If the tool is provided with e.g. kiilakiristyksel-20 groups can be a conduit connected to the substrate only on one side of the working.

Claims (6)

5,886,445 Patent applications A pipe connection (9, 10) connected to a pressure-resistant container (8) of flexible material for conducting a pressurized gas or liquid to the container, the edges of an opening in the container material being fitted with two flanges (11, 12) pressed towards each other. the second flange (11) being integral with the tube (9, 10) and the second flange (12) being provided with a collar portion (19) surrounding the tube, characterized in that the second flange (12) is locked in place by welding its collar portion ( 19) into the pipe. Pipe connection according to Claim 1, characterized in that the pipe (9, 10) with its flanges (11) and the second flange (12) with its collars are made of acid-resistant metal. Pipe connection according to Claim 1 or 2, characterized in that the container (8) is intended for use as a sealing element in the direction of the drum axis, which can be fitted to the drum (2) of a pressurized drum washer between the pressurized space (20) and the pulp track discharge point (5). A method of connecting a pipe connection (9, 10) to a pressure-resistant container (8) of flexible material, wherein the edges of an opening in the container material are fitted between two flanges (11, 12) surrounding the pipe and the flanges are pressed towards each other, and the pipe (9) is used. 10) with which the second flange (11) is integral, and a second flange with a collar (19) is fitted to the tube (9, 10), which is pressed towards the flange (11) integral with the tube, characterized in that the collared flange (12) is locked in place by welding its collar (19) to 30 tubes. A tool for connecting a pipe connection (9, 10) to a pressure-resistant container (8) of flexible material, characterized in that the tool comprises a body part (14) to be fitted through the pipe connection, a abutment surface (16) to be fitted against the flange 35 in one piece with the pipe connection ), a tubular pusher (17) and a clamping member (15 ') to be fitted against the edge of the collar (19) of the second flange (11) for pushing the pusher (17) towards the abutment surface (16). 6 88645