JPS62127592A - Duct joint for connecting brittle material pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a pipe joint for connecting pipes made of brittle materials.

This pipe joint has two opposing pipe ends extending outward, and each pipe end is surrounded by a flange at a certain distance in the radial direction. On the other hand, the inside of the flange is made to match the shape of the flange, and the outside is enlarged. A resilient deformable insert is disposed between the tube end and a flange surrounding the tube end, the flanges being axially resiliently supported against each other, and the resilient deformable insert being axially and Loaded in radial direction.

Conventional technology In traditional glass device construction, for example, ceramics.

Stone Products 1 Conduit fittings of the first mentioned type in quartz equipment have been shown to be effective. This pipe fitting has two essential weaknesses:

(a) Prolonged operation, especially under the influence of field temperatures and contact pressures, can cause the elastic insert to adhere firmly to the tube end on the one hand and to the flange on the other hand. It becomes very difficult to remove the flange from the tube end during the sometimes necessary disassembly. Often too much force is applied and the tube breaks.

(b) Resilient inserts can only withstand up to a certain point, which is the fixation end of the seven-lunge. Insert 1 piece of material i
! The yielding due to fatigue and temperature effects of l is compensated by the automatic movement of the flanges due to the elastic support of the insert, which can be practically used by using springs and by using bolts. The flange expands under the influence of heat.

The expansion of the flange in the radial direction is greater than the expansion of the tube, especially when using metal materials or plastic books for the flange. It's different from that. The spring t under the bolt - compensates for the loosening caused by the different expansions of the flange and automatically presses the flange tightly again against the tube. If this process is often repeated sufficiently often, the strong contraction of the flange against the tube end during cooling may actually result in typical failure.

The object of the present invention is to avoid the possibility of slippage of the elastic insert and/or flange of the prior art line couplings, and at the same time to design a line coupling that can be easily removed.

The task is to increase the surface roughness on the inside of each 7 flange or on the outside of each tube end at least in the area of the resilient and deformable insert, which has at least a protrusion shape and at least a play shape and its roughness. This is achieved, for example, by engaging in frictional contact with an elastically deformable insert.

11 By increasing the coefficient of friction between the flange and/or tube end and the insert of the present invention, the permanent sliding of the flange is reduced by the elastic deformable f
When the il'i inserts are glued together, it is possible to avoid this by changing the temperature, as in the ideal case, which occurs due to the force transfer of the pipe joint for connecting pipes made of brittle materials.

The pipe joint according to the invention has the advantage, compared to this ideal case, that the joint can be removed more easily.

The surface roughness is increased by at least a circumferential stepped play on the flange and/or the tube end. In play, the resilient deformable insert is tightened as it supports the flange. The configuration of one or more circumferential stepped plays allows for irregular surface roughness.After the initial elastic insert has hardened, the flange can be removed again without problems by an in-tube impact. There is an advantage. If the steps are finely or coarsely stepped about it, any other slippage of the flange is absolutely prevented, and only then does the flange reach its final position. In contrast, elastic inserts have irregular surface roughness in which the non-planarity of the surface is determined, the insert hardens under the influence of time and temperature, and the 7-lunge can be removed again if necessary. − to become the United Nations. The connection can be easily removed, especially if the step-like play is substantially IF with respect to the tube end axis.
i+ti tH when it has a shape that extends directly and another face flares outward with respect to the tube end. The play on the other surface is in a circular shape (14 parts, 1
The preferred angle is approximately 4 degrees. The stepped play structure shown in A can be easily removed by pushing the flange in the opposite direction.

In order to facilitate removal, it is equally advantageous to provide a step-like play on the flange as well as on the tube end. Elasticity (IVi inserts are compressed when they are tightened with play, and like the flange, the pipe end reaches the final neck and does not loosen in the approaching direction.Removal. Even after the initial resilient insert has hardened, a simple blow is sufficient to remove the flange again.

In extreme cases, a firm adhesion of the insert may nevertheless occur under the influence of the temperature, but this effect can still be avoided. If other embodiments of the invention implement a solid, non-adhesive material 1 into the insert design, the cost is generally higher, but the cost-effective solution is The preferred result is often to equip the insert with a thin film that reduces adhesion on the side that is oriented, so that the desired result is sufficiently reduced.

Next, a practical example of the present invention will be explained in detail with reference to the drawings.

Pipe joints for connecting pipes made of brittle materials such as glass and ceramics 9 stoneware 1 quartz, ceramics, etc. Pipe joints are arranged in a line in the sleeve direction / V-shaped pipe end 1 and its end outwards. It faces out in a conical shape.

6 pipes *J: 1 is surrounded by a flange-shaped coaxial clamp ring 2. The inside of this crumbling ring 2 is finished in the shape of a circle 31L in accordance with the outside shape of the tube end 1, and the crumbling ring 2 is then likewise expanded outward. A trapezoidal annular space is created between the crumbling ring 2 (C surrounded by /v with a certain interval in the radial direction and the pipe end 1 connected to it), and the pipe end 1 ↓ The resilient, deformable inserts 3 are arranged in a conical ring.

Both clamping rings 2 are rigidly connected by fixing bolts 4, and a spring 6 is arranged between the nut 5 and the front area of the clamping rings 2 relative thereto.

The inserts 31 are elastically supported with each other and the crumbling 2
The outer side of the tube end 1 is tightened to hold the crumbling ring 2 on the tube end 1 after elastic deformation.

The minimum inner diameter of the crumbling ring 2 is minimally larger than the maximum outer diameter of the end 1. Crumbling 2
is mainly finished from metal material r1, but it can also be manufactured from synthetic resin. The example crumbling ring 2 shown here is finished as a one-piece construction. However, when externally finishing a cone with a very high slope, the insert 3 is finished as a two-part h5 structure because if I'7 <=J, it becomes weak against external pressure.

The wooden feature of the present invention is the play 7 which runs in the circumferential direction in a step-like manner on the outside of the pipe ψ;
is provided, into which the insert is pushed inward. This step-like release 7 is shown in FIG. It is expanded into a conical shape at an angle of about 4 degrees inward with respect to 1. The stepped play 7 creates a surface roughness on the outside of the tube end 1 and on the inside of the crumbling ring 2, which surface roughness prevents the insert 3 and/or the crumbling ring 2 from sliding down in the approach direction and Then, the crumbling ring 2 and the insert reach their final position. At the same time, the conical design of the surface 9 of the stepped play 7 makes it possible to push the insert 3 back and to easily remove the refrump ring 2.

To assemble the pipe fitting, first slide the clamping ring 2 over the tube end 1 and push the insert 3 into the clamping ring 2 and bring it forward. The clamping ring 2 is again tightened onto the tube end 1 with the insert 3 into a fixed position. There the crumbling rings 2 are supported against each other and the resilient inserts 3 have a play 7
Insert the tube end 1 and push the clamping ring 2 inward.
Let's go. After reaching this end-of-foot position, the insert 3 no longer loosens in the direction of contact.

The insert 3 is made of polytetrafluoroethylene (PT), for example.
It can be manufactured from a fluorine-containing polymer such as FE) and fluorocarbon, and a small It has a thin film made of Synthetic 81 fat that reduces stickiness.

The problem of the invention can be solved by providing a circumferentially rotating step-like play in the embodiment described here and shown in the drawings, since the advantages of the invention can only be achieved when the play is provided. be.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the pipe joint with the cut plane placed along the axis of the pipe end, and FIG. 2 is an enlarged view of the section A of the pipe end in FIG. 1...Tube end, 2...Flange (crumbling), 3...Insert, 4...Bolt, 5...Nut , 6... Spring, 7
...Play, 8...But, 9...
Another thing.

Claims (1)

[Claims] 1. The outside of the opposing tube ends is enlarged outwardly, and each tube end is surrounded by a radially spaced flange, and the inside of the flange is shaped like the tube end. a resiliently deformable insert is disposed between each said tube end and said surrounding flange, said flanges resiliently supporting each other in the axial direction; In a conduit fitting for connecting brittle material pipes, in which the elastic deformable insert is axially and radially loaded, each flange (2) is located on the inside thereof and/or the respective pipe end (1 ) has at least a resilient deformable insert (3) on its outside.
having an enhanced surface roughness in the region of at least a protrusion and/or a shape consisting of at least a play (7);
A pipe fitting, characterized in that it engages in frictional contact with said elastically deformable insert (3). 2. The increased surface roughness constitutes a step-like play (7) rotating in the circumferential direction, forming a resilient deformable insertion between the flange (2) and the tube end (1). Things (3)
) A conduit joint according to claim 1, characterized in that the pipe joint is tightened by: 3. said stepped play (7) has a surface (8) extending substantially perpendicular to the axis of said conduit (1) and another surface (9);
3. The pipe joint according to claim 2, wherein the pipe joint has a shape that expands outward with respect to the pipe line. 4. Another surface of the play (7) is configured in a conical shape,
4. Pipe coupling according to claim 3, characterized in that it is formed with respect to the axis of the pipe end (1) at an angle [alpha] of between 1 and 10 degrees. 5. The pipe joint according to claim 4, wherein the angle α is about 4 degrees. 6. Claim 1, characterized in that said increased surface roughness is provided only on the outside of said tube end (1).
A pipe joint according to any one of items 5 to 5. 7. Pipe joint according to claim 6, characterized in that each stepped play (7) is provided only on the pipe end (1). 8. Each stepped play (7) is substantially connected to the conduit (1).
) and the other surface (8) extending perpendicularly to the axis of
8. A conduit joint according to claim 7, characterized in that the tube end (9) has a shape expanded outwardly with respect to the tube end (1). 9. Pipe coupling according to any one of claims 1 to 8, characterized in that the insert (3) is made of a sturdy, non-adhesive material. 10. A tube according to any one of claims 1 to 9, characterized in that the insert has an adhesion-reducing membrane on one or both radially oriented sides. Road joint. 11. Pipe joint according to any one of claims 9 and 10, characterized in that the insert (3) or the adhesion-reducing thin film consists of or is produced from a fluoropolymer. .