JP2005030554A - Method of caulking crosslinking polyethylene hose for water stop connection - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection method for stopping water by inserting a metal telescopic joint into a crosslinking polyethylene hose having a hard and flat inner face to be used for supplying hot water and water and caulking its contact portion at the outer periphery of the hose together with the hard crosslinking polyethylene hose and the metal telescopic joint. <P>SOLUTION: One or more O-rings 8 exist in the valleys of a wavy protruded portion of the metal telescopic joint 4 which is laid for joining a connection fitting 1 to the composite inner face crosslinking polyethylene hose 6. The metal telescopic joint 4 is inserted into the composite inner face crosslinking polyethylene hose 6 and caulked at an outer periphery portion of a metal skirt 5. Since the one or more O-rings 8 exist in the valleys of the wavy protruded portion of the metal telescopic joint 4, the metal telescopic joint 4 and the composite inner face crosslinking polyethylene hose 6 have mutually closer contact for good water stop connection. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a method for stopping and connecting a composite internally cross-linked polyethylene hose.

When inserting and connecting metal bamboo shoots that intervene to connect the hose and connecting fittings to a conventional rubber hose, vinyl hose, elastomer material hose, soft PVC hose, etc., all hose surfaces are soft, so hose bands, etc. If the outer peripheral part connected is tightened with a strong force by using or crimping, the hose has a sealing property, so that water can be stopped.

However, when a metal bamboo shoot is inserted into a composite inner cross-linked polyethylene hose and crimped as usual, there is a possibility that water will leak without sealing because it is hard. It is not possible to stop the water by the method expected for the sealing performance on the hose side as in the past.

Therefore, an O-ring is interposed between the composite inner surface cross-linked polyethylene hose and the metal bamboo shoot, and the O-ring is deformed by pressure bonding of the composite inner surface cross-linked polyethylene hose and the metal bamboo shoot to stop water.

The metal bamboo shoot inserted into this composite inner surface cross-linked polyethylene hose has an annular groove formed on the circumference of the hose insertion side, and a rubber O-ring is inserted into the annular groove when the composite inner surface cross-linked polyethylene hose is inserted. As a sealing material, it protrudes from the upper end of the annular groove and is interposed.

However, the O-ring protruding from the upper end of the annular groove moves when the metal bamboo shoot is inserted into the composite inner surface cross-linked polyethylene hose while moving in the annular groove while being in close contact with the inner surface of the hose. It may come off and it may not be possible to stop the water sufficiently.

In addition, there is little tolerance between the inner diameter of the hose and the outer diameter of the corrugated protrusion of the metal bamboo shoot. The protruding O-ring is inserted with considerable deformation when the metal bamboo shoot is inserted into the hose, or the O-ring. Since there is a possibility of scratching itself, it is necessary to use a very technical one to insert the O-ring itself so that the water stop function of the O-ring itself is fully exhibited.

For this reason, when assembling a metal bamboo shoot into a composite inner surface cross-linked polyethylene hose, it is necessary to pay attention to the state of the O-ring and its position both before and after insertion.

The present invention has been conceived under the circumstances described above, and an object of the present invention is to provide a method capable of stopping and connecting water well and inexpensively based on a conventional method.

Therefore, one or a plurality of O-rings made of rubber are present in the valleys of the corrugated protrusions on the hose insertion side circumference of the metal bamboo shoots interposed in order to connect the composite inner surface cross-linked polyethylene hose and the connection fitting together.

The one or more rubber O-rings have a shape along the peak of the corrugated protrusion valley of the metal bamboo shoot, or an annular groove is formed on the circumference of the corrugated protrusion trough, And is projected from the upper end of the annular groove.

One or a plurality of O-rings present in any corrugated protrusion troughs may move because they are located lower than the corrugated protrusion peaks during assembly when a metal bamboo shoot is inserted into the composite internally cross-linked polyethylene hose. Never do.

In addition, one or more O-rings present in the corrugated protrusion troughs are located at a position lower than the corrugated protrusion peak of the metallic bamboo shoot when inserted into the composite inner cross-linked polyethylene hose together with the metal bamboo shoots. Although there is no sealing property, when a metal bamboo shoot is inserted into the composite inner surface cross-linked polyethylene hose and the contact portion is simultaneously crimped from the outer periphery of the composite inner surface cross-linked polyethylene hose, the corrugated protrusion valley of the metal bamboo shoot is By the presence of one or a plurality of O-rings, the metallic bamboo shoots and the composite inner surface cross-linked polyethylene hose can be in close contact with the corrugated projection valleys of the metallic bamboo shoots, and water can be satisfactorily stopped.

By having an O-ring in the corrugated protrusion valley of a metal bamboo shoot, there is no risk of twisting or scratching in the O-ring itself when it is inserted into a composite inner surface cross-linked polyethylene hose. There is no need to use it. Therefore, no technical items are required during assembly.

Moreover, by inserting a metal bamboo shoot into the composite inner surface cross-linked polyethylene hose, and simultaneously crimping the contact portion from the outer peripheral portion of the composite inner surface cross-linked polyethylene hose, one or more in the corrugated protrusion valley of the metal bamboo shoot The presence of the O-ring allows the composite inner surface cross-linked polyethylene hose to be in close contact with the corrugated protrusion valleys of the metal bamboo shoots and thus to stop water well, so that the water stop function is reliably improved.

In addition, since it is possible to reuse a metal bamboo shoot that has been used in the past, there is no cost for manufacturing a separate metal bamboo shoot. The same applies to equipment used for assembly.

From the above, it is possible to provide an inexpensive product having a stable water stop function equivalent to or higher than that of the conventional product as a whole.

The water stop / connection method of the composite inner surface cross-linked polyethylene hose according to the present invention will be described with reference to the drawings. 1 is mainly used for the product assembly procedure and product description, and FIG. 2 is used as a supplement to FIG.

The composite inner cross-linked polyethylene hose 6 here is wound around a hard and cross-linked polyethylene hose with a flat inner surface using polypropylene (PP) 2 in FIG. 2 as a reinforcing core, and the exterior is covered with an elastomer material 3 in FIG. ing. When the pressure is applied to the composite inner surface cross-linked polyethylene hose 6, the steel wire blade 7 is covered also with a pressure resistance.

The metal bamboo shoot 4 interposed to connect the connecting metal cap nut 1 for connecting to the other party (not shown) and the composite inner surface cross-linked polyethylene hose 6 has a corrugated protrusion on the hose insertion side circumference. One or a plurality of O-rings 8 made of rubber are present in the protruding valleys.

One or more rubber O-rings 8 present on the corrugated protrusions of the metal bamboo 4 are positioned lower than the corrugated protrusion crest when the metal bamboo 4 is inserted into the composite inner cross-linked polyethylene hose 6. Therefore, there is no movement from the set position, and there is no sealing property.

The metal skirt 5 is a thin-walled pipe and has substantially the same length as that of the metal bamboo shoot 4, and one side has an inner diameter enough to insert a composite inner cross-linked polyethylene hose 6 covered with a steel wire blade 7. Since the other side also serves to prevent the metal bamboo shoot 4 from coming off when crimped, it has a small hole diameter that allows the corrugated protrusions of the metal bamboo shoot 4 to pass through during assembly.

It is also known that the metal skirt 5 exists to prevent the steel wire blade 7 and the metal bamboo 4 from coming off when crimped.

A metal bamboo shooter 4 in which one or a plurality of O-rings 8 are present on the corrugated protrusions is incorporated into the connecting metal cap nut 1, and the small diameter of the metal skirt 5 is placed on the connecting metal bag nut 1 side. Insert into 4.

Next, the composite inner surface cross-linked polyethylene hose 6 covering the steel wire blade 7 is inserted into the metal skirt 5. At this time, the metal bamboo shoot 4 is simultaneously inserted into the composite inner surface cross-linked polyethylene hose 6.

After confirming that the composite inner surface cross-linked polyethylene hose 6 covering the steel wire blade 7 is completely inserted, it is caulked strongly from the outer peripheral portion of the metal skirt 5.

When one or more O-rings 8 are present in the corrugated troughs of the metal bamboo shoot 4 when strongly crimped from the outer periphery of the metal skirt 5, the metal bamboo shoot 4 and the composite inner surface bridge The polyethylene hose 6 can be adhered to the corrugated protrusion valley of the metal bamboo shoot and can be stopped and connected well.

Further, in the above embodiment, a cap nut is used as an example of the connection fitting. However, depending on the counterpart connection fitting, and for water stoppage and connection of the crosslinked polyethylene hose whose inner surface which is a water contact surface is hard, it deviates from the gist of the present invention. It can be configured in various forms with various modifications within the range not to be performed.

It is a product assembly procedure and a product explanatory diagram. It is a composite inner surface cross-linked polyethylene hose part enlarged sectional view.

Explanation of symbols

1 Cap nut 2 Rubber packing 3 Sheet packing 4 Bamboo shoot 5 Skirt 6 Composite internal cross-linked polyethylene hose 7 Steel wire blade 8 O-ring

Claims (3)

After inserting metal bamboo shoots into a cross-linked polyethylene hose with a hard and flat inner surface, and then tightening water from the outer periphery of the contact portion between the cross-linked polyethylene hose with a hard and flat inner surface and the metal bamboo shoot to stop and connect. One or more rubber O-rings of the corrugated protrusion trough of the metal bamboo shoot are shaped along the corrugated trough of the metal bamboo shoot, or an annular groove on the circumference of the corrugated protrusion trough The water stopping / connecting method according to claim 1, wherein the water stopping / connecting method is formed by being inserted into the groove and projecting from the upper end of the annular groove. Metal bamboo shoots intervening to connect the connecting metal fittings and the composite internal cross-linked polyethylene hose, whose inner surface is hard and flat, wrapped with polypropylene (PP) as a reinforcing core and whose exterior is covered with an elastomer material Insert a metal bamboo shoot having one or more rubber O-rings in the valleys of the corrugated protrusions on the hose insertion side circumference of the hose into a composite inner surface cross-linked polyethylene hose with a hard inner surface and a flat surface. The water stopping / connecting method according to claim 1, wherein the water is connected by crimping simultaneously from the outer periphery of the contact portion.