JP3011265U - Plumbing equipment - Google Patents

Abstract

(57) [Summary] [Purpose] If flexibility is required in the connection pipe between the thermoplastic resin pipe and the piping accessory, the flexible pipe that serves as the pipe can be easily connected to the thermoplastic resin pipe. Eliminate the risk of leaks and separations. [Structure] A sleeve-like joint fitting (5) is fixed to one end of the flexible pipe (1), and the joint fitting (5)
A sleeve-shaped thermoplastic resin receiving port (13) into which a thermoplastic resin pipe is inserted is integrally formed at the end of the receiving port (1).
Conductive wire (15) for heating and melting the joint surface by energization to the peripheral wall (14) of 3) for fusion with the thermoplastic resin pipe.
To bury.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water supply and sewerage system or a gas piping system. More specifically, it is used when flexibility is required in a connection line between a pipe made of a thermoplastic resin pipe and pipe accessories (valves, meters, etc.). Plumbing equipment.

[0002]

[Prior art]

 Conventionally, flexible pipes have been used in places where it is difficult to use rigid pipes, and joint fittings are attached to both ends so that they can be connected to rigid pipes and pipe accessories.

[0003]

[Problems to be solved by the device]

 When inserting a conventional flexible pipe between a thermoplastic resin pipe and a flowmeter, for example, the flexible pipe and the flowmeter can be easily connected with each other by metal, but the flexible pipe and the thermoplastic resin pipe can be connected together. The connection could be made because the connection is made of different materials, metal and resin.However, the structure of the joint metal fittings is complicated to prevent leakage and separation, high precision is required, and complicated sealing is required. There is a problem that a device is required, the cost is high, and the connection work is troublesome.

In the present invention, when flexibility is required in the connection conduit between the thermoplastic resin pipe and the piping accessory, the flexible pipe serving as the conduit and the thermoplastic resin pipe can be easily connected to prevent leakage. The purpose is to provide a piping device that does not pose a risk of separation.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, in the piping device of the present invention, a sleeve-like joint fitting (5) is fixed to one end of the flexible pipe (1), and a thermoplastic resin is attached to the end of the joint fitting (5). The sleeve-shaped thermoplastic resin receiving port (13) into which the pipe is inserted is integrally formed, and the peripheral surface (14) of the receiving port (13) is heated and melted at the joint surface by energization to melt the thermoplastic resin pipe. It is formed by embedding a conductive wire (15) for fusing.

[0006]

[Work]

 With the thermoplastic resin tube inserted into the sleeve-shaped thermoplastic resin inlet at one end of the flexible pipe, the conductive wire is energized to heat and melt the joint surface, and the thermoplastic resin inlet and thermoplastic resin The joint surface with the pipe is fused and the flexible pipe and the thermoplastic resin pipe are connected (joined).

[0007]

【Example】

 An embodiment will be described with reference to the drawings. In the flexible tube (1), a metal flexible tube (2) (hereinafter referred to as a flexible tube) in which tube walls other than both ends (2a) and (2b) are formed into a bellows shape. ), A knitting blade (3) on the outer surface of the flexible tube (2), and a cover rubber (4), for connecting and connecting a thermoplastic resin tube (not shown) to one end of the flexible tube (1). The sleeve-shaped joint fitting (5) is provided at the other end of the flexible pipe (1) with the sleeve-like joint fitting (6) for connecting and connecting piping accessories (not shown) such as valves and meters. Each is fitted and fixed.

The joint fittings (5) and (6) are fitted on the outer sides of both ends (2a) and (2b) of the flexible tube (2), and the braided braid is attached to the outer surface of the joint fittings (5) and (6). (3) and the end of the cover rubber (4) are covered.

A ring groove (7) is provided on the outer peripheral surface of each joint fitting (5) (6), and a ring-shaped metallic blade retainer (8) that fits into each ring groove (7) is provided. The end of the upper blade (3) is held by the ring groove (7) on the outer surface of the joint fitting (5) (6) via the blade retainer (8).

The cover rubber (4) is fitted into the joint fittings (5) and (6) beyond the ring groove (7), and both ends of the cover rubber (4) protruded from both ends of the knitting blade (3). Due to this elastic force, the parts are brought into close contact with the outer peripheral surfaces of the joint fittings (5) and (6).

At the end of the joint fitting (6) for connecting the piping accessory, a nut (9) for connecting to the other end of the screw-in type pipe joint (not shown) for connecting one to the piping product of the piping accessory. ) Is attached and the isotropic (10) is a connecting ring of the nut (9). The tip of the end (2b) of the flexible tube (2) fitted inside the joint fitting (6) is bent at a right angle to the outside along the end face of the joint fitting (6).

The O-ring groove (11) is provided on the inner peripheral surface of the joint metal fitting (5) for connecting the thermoplastic resin pipes, and the O-ring (12) fitted in the groove (11) is provided. The ring (12) into the groove (11) of the inner peripheral surface of the joint fitting (5) and the groove (11) at the end (2a) of the flexible tube (2) fitted inside the joint fitting (5). By closely contacting the corresponding outer peripheral surface, the airtight (water) is kept tight at the joint surface between the flexible tube (2) and the joint fitting (11).

A sleeve-shaped receiving port (13) into which the thermoplastic resin tube is fitted is formed integrally with the end of the joint fitting (5). A conductive wire (15) for fusing is embedded in the peripheral wall (14) of the receiving port (13). A pair of shaft holes (16) are provided on the end surface of the receiving port (14), and terminal pins (17) connected to each end of the conductive wire (15) are provided with holes (from the bottom surface of each shaft hole (16)). 16) It is fixed by protruding inside. In addition, a shaft hole (18) for an indicator that extends from the conducting wire (15) to the outer surface of the receiving port (13) is provided.

The fusion of the receiving port (14) and the tube is performed by connecting the connector of the fusion welding power supply control device (not shown) to both terminal pins (in the state in which the end of the pipe is inserted into the receiving port (14)). 17), and the conductive wire (15) is energized to heat and melt the joint surface between the receiving port (15) and the pipe.

The power supply to the conductive wire (15) is appropriately continued or interrupted by visually confirming the molten state of the molten resin flowing out from the indicator shaft hole (18) provided in the receiving port (13).

Here, the receiving port (13) is a thermoplastic resin molded product, and the molding material that is melted by heat in the injection cylinder and fluidized is tightly closed by an injection plunger or an injection screw. It is molded by press-fitting into a mold. In this molding, the joint metal fitting (5) and the conductive wire (15) (both terminal pins (17) are located at the same end in advance in the mold. The conductive wire folded in two is wound in a coil shape along the cylindrical surface and held in the shape of a sleeve). By inserting (inserting) the socket (13) into the joint fitting (5) Is integrally molded at the end of the, and the conductive wire (15) is embedded in the peripheral wall (14) of the receiving port (13).

A ring groove (19) is formed on the outer peripheral surface of the joint fitting (5) to form an uneven portion on the joint surface with the receiving opening (13), and the receiving opening (13) for the joint fitting (5) is formed. The joint metal fitting (5) is provided with a discontinuous groove (20) on the end surface of the joint metal fitting (5) for forming an uneven portion on the joint surface with the receptacle (13), and Stops the mouth (13) from turning.

[0018]

[Effect of device]

 As is apparent from the above embodiments, according to the present invention, a sleeve-like joint fitting (5) is fixed to one end of the flexible pipe (1), and a thermoplastic resin pipe is fitted to the end of the joint fitting (5). The sleeve-shaped thermoplastic resin receiving port (13) to be inserted is integrally molded, and the peripheral surface (14) of the receiving port (13) is heated and melted at the joint surface by energization to fuse with the thermoplastic resin pipe. Since the conductive wire (15) for this purpose is buried, the flexible pipe (1) and the thermoplastic resin pipe can be easily connected without the risk of leakage or separation.

The structure of the joint fitting (5) between the flexible pipe (1) and the thermoplastic resin pipe is simplified, does not require very high precision, does not require a complicated sealing device, and can reduce the cost. Connection work becomes easy.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a piping device.

[Explanation of symbols]

 (1) Flexible pipe (5) Joint fitting (13) Receptacle (15) Conductive wire

Claims (1)

[Scope of utility model registration request] 1. A sleeve-shaped thermoplastic resin in which a sleeve-shaped joint metal fitting (5) is fixed to one end of the flexible pipe (1) and a thermoplastic resin pipe is inserted into the end of the joint metal fitting (5). The receiving port (13) is integrally molded, and the peripheral wall (14) of the receiving port (13) is provided with a conductive wire (15) for heating and melting the joint surface by energization to fuse with the thermoplastic resin pipe. A piping device that is embedded.