JPH0557055U - Double piping structure - Google Patents

Abstract

(57) [Summary] [Purpose] To make it possible to thaw the freezing inside the plastic pipe for water and hot water inserted in the sheath by heat exchange with the heated antifreeze liquid. [Structure] A double pipe consisting of a sheath pipe 1 and a plastic main pipe 2 for water supply and hot water inserted in the sheath pipe 1. The plastic main pipe 2 is vertically attached to the plastic main pipe 2. Then, the plastic sub-pipes 3, 4 (reciprocating double pipes) for circulating the antifreeze liquid are provided, and the heated antifreeze liquid can be circulated in the plastic sub-pipes 3, 4.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a double pipe structure for water and hot water supply that is laid under the floor of a house or building, in the ceiling, inside a partition wall, inside an outer wall, etc., and has been improved to thaw the freezing of water generated in a plastic pipe. It is a thing.

[0002]

[Prior Art]

 In indoor piping in cold regions where metal pipes are used for water and hot water supply, when the fluid inside the pipe freezes, electricity is applied to the exposed portion of the pipe, such as inside the outer wall, and the freezing is thawed by its electrothermal action. ..

[0003]

[Problems to be solved by the device]

 Recently, plastic pipes have been widely used for indoor piping for water and hot water supply.When laying this plastic pipe, a so-called double pipe that uses a plastic sheath that has been laid in advance as a guide member for the pipe is used. The construction method is adopted. Therefore, the method of thawing freezing by the electrothermal action as described above cannot be used, and a solution has been desired.

Therefore, the present invention solves the above problems by focusing on the fact that the freezing in the plastic pipe for water supply and hot water supply can be thawed by using the heated antifreeze liquid, and the purpose is to provide water supply and hot water supply. It is an object of the present invention to provide a double piping structure configured so that a heated antifreeze liquid is circulated along a plastic pipe for use and the freezing inside the plastic pipe can be easily melted by heat exchange with the antifreeze liquid.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a double piping structure which is a feature of the present invention is a double piping consisting of a sheath pipe and a plastic main pipe for water supply and hot water inserted in the sheath pipe. The above-mentioned plastic main pipe is provided with a plastic sub-pipe for vertically circulating the antifreeze liquid, which is vertically attached to the plastic main pipe.

[0006]

[Action]

 When the water in the plastic main pipe freezes, the antifreeze liquid flowing into the plastic sub-pipe is heated and circulated, whereby the freezing inside the plastic main pipe can be thawed by heat exchange with the antifreeze liquid.

[0007]

【Example】

 The present invention will be described below with reference to the drawings. Reference numeral 1 denotes a plastic sheath (for example, a corrugated pipe made of polyethylene), and a plastic main pipe for supplying water and hot water (for example, a corrugated pipe made of polyethylene). , Cross-linked polyethylene) 2 is inserted to form a double pipe.

The plastic main pipe 2 is provided with a pair of plastic sub-pipes (for example, made of cross-linked polyethylene) 3 and 4 which are vertically attached to the plastic main pipe 2 to form a reciprocating double pipe for circulating an antifreeze liquid. The plastic main pipe 2 and the plastic sub-pipes 3 and 4 are bound together by tape winding, and 5 is the tape winding layer.

During piping work, the base end portions (not shown) of the plastic sub-pipes 3 and 4 are connected to the boiler and extend to the faucet device (not shown) side. Both tips 3a and 4a are tightly connected in advance by a joint (not shown) in the length reaching the front part of the faucet device, and the plastic main 2 is inserted into the sheath 1 as usual. It is inserted and laid as a so-called double piping structure.

In place of the reciprocating double pipe structure of a pair of plastic sub-pipes 3 and 4, a single plastic sub-pipe for circulating antifreeze liquid may be vertically attached to the plastic pipe 2, but in this case, It takes time and effort to connect the plastic auxiliary pipe on the other double piping side on the stopper device side during piping work, and it is necessary to provide a work port for the connection work on the outer wall etc. A reciprocating double pipe structure is practically preferable.

[0011]

[Effect of the device]

 The present invention is as described above, and it is safe because it exchanges heat with the heated antifreeze liquid, and it can surely thaw the freezing inside the plastic tube. In addition, the plastic auxiliary pipe that circulates the antifreeze liquid is vertically attached to the original plastic main pipe for water supply and hot water supply, and can be inserted integrally into the sheath pipe, so piping work can be as easy as before. It has a working advantage and can promote the effect of using it on the water and hot water supply side in a double piping structure in winter and cold regions.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of the present invention.

FIG. 2 is a partial perspective view of a plastic main pipe side excluding the sheath pipe of FIG.

[Explanation of symbols]

1 sheath tube, 2 plastic main pipe, 3 and 4 plastic sub pipe

Claims (1)

[Scope of utility model registration request] 1. A double pipe comprising a sheath pipe and a plastic main pipe for water supply and hot water inserted in the sheath pipe, wherein the plastic main pipe is vertically attached to the plastic main pipe. A double piping structure characterized by being provided with a plastic auxiliary pipe for circulating antifreeze liquid.