JP2020109301A - Pipe joint adaptor - Google Patents

Abstract

To provide a piping method that does not need to bypass a narrow area.SOLUTION: An upstream side pipe joint 101 is disposed in an upstream side wide area K2 located on an upstream side of a narrow area K1, and a downstream side pipe joint 101 is disposed in a downstream side wide area K3 located on a downstream side of the narrow area K1. A plurality of divided pipes 103 having a nominal diameter smaller than that of a main pipe 100 connected to the pipe 101 is inserted in the narrow area K1. The plurality of divided pipe 103 is branched off from the main pipe 100 on the upstream side through one of a pair of pipe joint adaptors 11, and the plurality of divided pipes 103 is merged to the main pipe 100 on the down stream through the other pipe joint adaptor 11.SELECTED DRAWING: Figure 1

Description

The present invention relates to a pipe joint adapter used for performing piping through a narrow area.

On page 48 of Non-Patent Document 1, a cross-linked polyethylene pipe for supplying hot water and hot water is disclosed. The cross-linked polyethylene pipe is lined up with nominal diameters of "10", "13", "16", and "20" conforming to the JIS standard. A cross-linked polyethylene pipe having a nominal diameter of "16" and a cross-linked polyethylene pipe having a nominal diameter of "20" are often used as main pipes in, for example, pipes for supplying water and hot water for general households. A cross-linked polyethylene pipe having a nominal diameter of "10" and a cross-linked polyethylene pipe having a nominal diameter of "13" are often used as branch pipes connecting a main pipe and an end faucet, for example, in a water supply and hot water supply pipe of a general household. ..

Onda Mfg. Co., Ltd. "General Catalog 2018-2019", page 48

For example, in reforming a pipe for supplying hot water and hot water for a house in a condominium, there is a demand to use a space between a floorboard and a concrete slab, that is, an underfloor space for the pipe. In the underfloor space, there are many cases where there is a narrow region where the distance between the floorboard and the concrete slab is about 20 mm. In this case, the cross-linked polyethylene pipe having a nominal diameter of "10" has an outer diameter of 12.85 mm to 13.15 mm, and the cross-linked polyethylene pipe having a nominal diameter of "13" has an outer diameter of 16.85 mm to 17.15 mm. Therefore, problems are unlikely to occur in the arrangement using the narrow area.

However, the cross-linked polyethylene pipe having a nominal diameter of "16" has an outer diameter of 21.35 mm to 21.65 mm, and the cross-linked polyethylene pipe having a nominal diameter of "20" has an outer diameter of 26.85 mm to 27.15 mm. However, it is difficult to arrange in the narrow area. Therefore, there is a large restriction on the handling of the main pipe that needs to bypass the narrow area.

An object of the present invention is to provide an adapter for pipe fittings that does not need to bypass a narrow area.

In order to achieve the above object, the pipe joint adapter according to claim 1 comprises a plurality of pipe connecting portions and a pipe joint connecting portion that collects the plurality of pipe connecting portions into one, The connecting portion has a pipe shape that can be inserted and connected to another pipe joint, and the nominal diameter of the connecting portion for the pipe joint is any of the pipes connected to each of the plurality of pipe connecting portions. It is set larger than the diameter.

The top view of the main pipe in the underfloor space. FIG. 3 is a cross-sectional view of a narrow area in the underfloor space.

Hereinafter, the pipe joint adapter of the present invention will be described with reference to the drawings.
As shown in FIG. 2, in a condominium house, an underfloor space exists between a floor plate 201 and a concrete slab 202. In the underfloor space, there is a narrow region K1 in which the distance between the floor plate 201 and the concrete slab 202 is about 20 mm. In the reform of the pipe for supplying hot water and hot water in the house, the space under the floor is used for disposing the main pipe. In this case, when bypassing the narrow region K1, there is an inconvenience such as the lengthening of the main pipe. Therefore, the main pipe is arranged also using the narrow region K1 as follows.

As shown in FIG. 1, in the underfloor space, an upstream large area K2 located upstream of the narrow area K1 (upper side of FIG. 1) and under the floor downstream of the narrow area K1 (lower side of FIG. 1). The pipe joints 101 connected to the main pipes 100 are arranged in the large downstream regions K3 located. The pipe joint 101 is a socket type (straight type). The main pipe 100 is a cross-linked polyethylene pipe conforming to the JIS standard, for example, and has a nominal diameter of “16” or “20”, and thus an outer diameter of 21.35 mm to 21.65 mm or 26.85 mm to 27. It is 15 mm.

The pipe joint 101 includes a main pipe connecting portion 102 in which a well-known one-touch type lock/seal mechanism 102a is installed. The corresponding main pipe 100 is inserted and connected to the main pipe connecting portion 102.

The plurality of (two in the present embodiment) split pipes 103 are cross-linked polyethylene pipes conforming to the JIS standard, and have a smaller nominal diameter than each main pipe 100. For example, each split pipe 103 has a nominal diameter of "10" or "13", and thus an outer diameter of 12.85 mm to 13.15 mm or 16.85 mm to 17.15 mm. The plurality of divided pipes 103 are arranged in parallel with each other and reach the downstream wide area K3 from the upstream wide area K2 via the narrow area K1.

The operation of inserting the plurality of divided pipes 103 into the narrow region K1 may be performed individually one by one. Alternatively, the tips of the plurality of divided pipes 103 may be temporarily joined using a tape, a jig, or the like (not shown), the joined portions may be inserted into the narrow region K1, and then the joined may be released. ..

A pair of pipe joint adapters 11 is prepared, one pipe joint adapter 11 is arranged in the upstream wide region K2, and the other pipe joint adapter 11 is arranged in the downstream wide region K3. In the upstream wide area K2, the pipe joint adapter 11 branches the corresponding main pipe 100 into a plurality of divided pipes 103. In the downstream wide area K3, the pipe joint adapter 11 joins the plurality of pipes 103 with the corresponding main pipes 100.

The pipe joint adapter 11 includes a plurality (two in the present embodiment) of pipe connecting portions 22 and a pipe joint connecting portion 21 that collects the two pipe connecting portions 22 into one. The two pipe connecting portions 22 are arranged in parallel with each other. The axial center of the pipe joint connection portion 21 and the axial center of each pipe connection portion 22 are parallel to each other. Each pipe connecting portion 22 has a known one-touch type lock/seal mechanism 22a.

The pipe joint connection portion 21 has a pipe shape that can be inserted and connected to the main pipe connection portion 102 of the pipe joint 101. A groove 21a that engages with the lock/seal mechanism 102a of the main pipe connecting portion 102 is provided on the outer peripheral surface of the pipe joint connecting portion 21. An outer peripheral edge and an inner peripheral edge of the distal end portion 21b of the pipe joint connecting portion 21 are tapered, and the outer peripheral edge has a small diameter on the distal end side and the inner peripheral edge has a large diameter on the distal end side.

The nominal diameter of the pipe joint connection portion 21 is the nominal diameter “16” or the nominal diameter “20” so as to correspond to the main pipe connection portion 102 of the pipe joint 101. The pipe joint connection portion 21 is inserted into the main pipe connection portion 102 of the pipe joint 101, and the lock/seal mechanism 102a prevents the pipe joint connection portion 21 from coming off and ensures watertightness.

The corresponding size of each pipe connecting portion 22 is the nominal diameter “10” or the nominal diameter “13” so as to correspond to the split pipe 103. One end portion of the corresponding divided pipe 103 is inserted into each pipe connecting portion 22, and the lock/seal mechanism 22a prevents slipping and water-tightness.

Each pipe joint adapter 11 may be connected to the plurality of divided pipes 103 after inserting the plurality of divided pipes 103 into the narrow region K1. In addition, in a state where one of the pair of pipe joint adapters 11 is connected to the plurality of divided pipes 103, the plurality of divided pipes 103 are inserted into the narrow region K1, and after the insertion, a pair of pipe joints is formed. The other of the adapters 11 may be connected to the plurality of split pipes 103.

The following effects can be obtained in this embodiment.
The pipe joint adapter 11 arranged in the upstream large region K2 branches one main pipe connecting portion 102 into a plurality of pipe connecting portions 22. The pipe joint adapter 11 arranged in the downstream large area K3 joins the plurality of pipe connecting portions 22 into one main pipe connecting portion 102. Therefore, the nominal diameter of each divided pipe 103 is made smaller than the nominal diameter of the main pipe connecting portion 102, and the necessary flow rate (passing cross-sectional area) can be secured while effectively using the narrow region K1.

<Other example>
The present invention can be implemented in the following modes, for example.
The pipe joint adapter 11 is configured with one pipe joint connection portion 21 and three, four, five, six or seven pipe connection portions 22.

The pipe joint adapter 11 is configured by a plurality of pipe joint connection portions 21 and a larger number of pipe connection portions 22 than the pipe joint connection portions 21.

-Different nominal diameters of some of the split pipes 103 and the remaining split pipes 103 of the plurality of split pipes 103. For example, among the plurality of divided pipes 103, some of the divided pipes 103 have a nominal diameter of “10” and the remaining divided pipes 103 have a nominal diameter of “13”. Accordingly, in each of the pipe joint adapters 11, some of the plurality of pipe connecting portions 22 have different sizes from the rest. For example, in each pipe joint adapter 11, a part of the plurality of pipe connecting portions 22 has a size corresponding to the split pipe 103 of the nominal diameter “10”, and the rest are split pipes 103 of the nominal diameter “13”. Be compatible size.

○ As the narrow area, in addition to those existing in the underfloor space, there are areas existing in the ceiling space and those existing in the wall space.

11... Pipe joint adapter, 21... Pipe joint connection part, 22... Pipe connection part, 101... Pipe joint, 103... Split pipe as pipe, K1... Narrow region, K2... Upstream wide region, K3... Downstream Side vast area.

Claims (1)

A plurality of pipe connecting portions and a pipe joint connecting portion that collects the plurality of pipe connecting portions into one are provided, and the pipe joint connecting portion has a pipe shape that can be inserted and connected to another pipe joint. And, the nominal diameter of the pipe joint connection portion is set to be larger than any of the nominal diameters of the pipes connected to the plurality of pipe connection portions.

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