JP2009108990A - Residential plumbing method and prefabricated piping member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem in which in the past, a pipe member is wasted because plumbing is performed at a job site for plumbing and connecting, and a joint member and a pipe jointed and connected to the joint member cannot be heated, melted and fused because they are turned into crosslinked polyethylene by reactive processing of crosslinking immediately after molding, as a result, an indirect method is performed for fusing a joint connection by covering a required part with heatable and meltable polyethylene. <P>SOLUTION: Plumbing design drawings illustrating from a header to each terminal faucet are prepared, and a pipe 1 molded from a silane grafted resin is cut to each size corresponding to the plumbing design drawings. After the cut pipes are fused to the joint member such as the header 2 and formed into a prefabricated piping member, the prefabricated piping member is subjected to the reactive processing of crosslinking and plumbed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a water plumbing method for residential use when a new house such as a detached house or an apartment house is built or renovated, and a prefabricated piping member used therefor.

  Conventionally, pipes around residential water are piped from tap water intakes and water heaters to headers such as washrooms, kitchens, bathrooms, etc., as described in Patent Document 1, for example. The required quantity is roughly selected and transported to the site, and the piping design is performed by measuring the laying piping distance at the construction site. The piping members have been adjusted.

  The conventional method of performing all the adjustments of the dimensions, etc., from the piping design to the construction site at the construction site is wasteful in the use of pipes and other piping materials, and unlike the factory, the working environment is not prepared and is extremely non-functional. Because it was an efficient situation, as described in Patent Document 2, the CAD design was made in advance based on the floor plan and the foundation plan of the site. Prefabricated piping to pack has been proposed.

  In addition, for the joint fusion between the joint and the piping pipe at the construction site, as described in Patent Document 3, a heating wire is embedded in the inner peripheral surface of the joint in order to fuse the inner surface of the joint body to the outer surface of the resin pipe, A terminal pin connected to both ends of the heating wire is erected on the outer surface of the main body and electrically heated through the terminal pin to be fused to the joint inner surface and the resin pipe outer surface.

However, for the electric fusion joint as in Patent Document 3, the material constituting the joint and the basic body of the pipe is a heat-resistant crosslinked polyethylene and does not melt by heating. In general, a conventional polyethylene in which a crystal part and an amorphous part melted by heating and a cross-linked resin constituting a basic body are molded into a two-layer structure so that heat fusion is performed in the polyethylene part.
JP 2002-161560 A JP 2002-327858 A JP-A-2-30517 JP 2006-289857 A

  In the systems for the above-mentioned conventional prefabricated piping in Patent Documents 1 and 2, the pipe and the header or joint must be joined at the construction site, and the mechanical joint for joining the pipe and the header or joint at the site is used. Many operations such as operation are required.

  Moreover, the operation | work which joins a pipe on-site with a joint member must bear many risks, such as the water leakage of the joint part by unskilled work. In addition, if the number of joints increases, it is aesthetically inferior to piping without joints, and a joint member must be formed and manufactured separately from the pipes, which is disadvantageous in terms of cost.

  Furthermore, about the method of electrically welding the joint member and piping pipe or piping pipes in patent documents 1 and 2 on-site, the material which comprises the joint and the basic body of a pipe is heat-resistant crosslinked polyethylene, and by heating Is not melted, ordinary polyethylene that is melted by heating is coated on the surface of the cross-linked resin to form two layers so that the polyethylene part is fused.

  However, polyethylene that melts by heating begins to soften at about 80 ° C (60 ° C or less for safety in handling), so when used in hot water pipes, etc., when it is used at a high temperature, There is a problem with the risk of disengagement when the load is applied.

  Furthermore, conventionally, the cross-linking reaction processing for a long polyethylene pipe can be performed only in a coiled state due to space and movement handling. However, since polyethylene has shape memory performance due to a cross-linking reaction, it is difficult to perform straight line construction when the pipe is curled, and there is a problem that extra labor is required to straighten the pipe.

  The present invention intends to cope with the above-described problems, and uses a floor plan and a foundation plan that have already been created by a construction company, and performs piping design by CAD design based on this. In addition to eliminating the waste of the piping construction company measuring the laying piping distance at the construction site again, it is necessary for on-site piping as a prefabricated product that grasps the required quantity and dimensions of piping members in advance and performs molding and crosslinking reaction processing at the factory Only things can be transported to the site.

  In addition, pipes molded with silane-grafted resin by adjusting the dimensions of the parts at each site in a factory with a good work environment based on the required quantity and dimensions of the pipe members ascertained in advance. After cutting into dimensions and fusing to a joint member such as a header by silane-grafted resin molding using a welding tool, etc., forming a prefabricated piping member, carrying out a cross-linking reaction process and transporting the piping to the site I tried to do it.

  That is, raw material resin obtained by reacting polyethylene with peroxide as a catalyst and reacting with trimethoxysilane to form a silane graft is molded into a pipe with a heat extruder, or used for a branch part with an injection molding line, such as a header, cheese, etc. When molded into joints, a silane-grafted polyethylene molded product is produced.

  At this stage, since no cross-linking reaction processing is performed, there is no heat resistance and thermoplasticity, so the molded pipe is cut to the design standard dimensions based on the piping design, and the cut surface and header The joint portion of the equal joints is melted and welded by a heating means such as a hot plate contact to constitute a prefabricated piping member corresponding to the piping design.

  The prefabricated piping member configured in this way is immersed in hot water or a steam bath, or passed through a pipe to perform cross-linking reaction processing, imparting heat aging resistance to the molded piping member, and fixing as a molded product having no thermoplasticity. I tried to do it.

  By bending the prefabricated piping member molded and fixed by cross-linking reaction processing into a shape that is easy to transport, packing the unit according to the piping design and transporting it to the site, it is possible to connect with water supply sources such as tap water intakes and water heaters at the site. It was made possible to perform extremely efficient piping work by working mainly on joints with basic joints such as headers.

  In other words, the present invention completes product processing as a prefabricated piping member by fusing and cutting piping pipes and backbone joints at the stage of molding with thermoplastic silane-grafted polyethylene, which is easy to process. In addition, heat aging resistance is imparted and fixed by cross-linking reaction processing.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is a piping pipe, and there are two types, a water supply pipe 1a and a hot water supply pipe 1b, which are piped around the water based on the piping design of a residence as shown in FIG. .

  For piping design, create a piping design drawing that combines the floor plan and foundation plan provided by the contractor, and input CAD information from the basic plan to launch the CAD design piping design diagram. It is done. The CAD design piping design drawing shows the dimensions including the curve point, and the piping design drawing shows the information on the length of the required hot water and hot water supply piping members, the fixed points, and the necessary members. Is done.

  The necessary piping members are prepared based on these information. First, the raw material resin grafted by reacting trimexisilane with polyethylene as a catalyst is melted and heated. The pipes are molded with a heating extruder, and the joints such as headers and cheese used for the branch parts are molded with an injection molding machine.

  Furthermore, the dimensions of the hot water and hot water pipes are adjusted for each site based on the CAD design and piping design drawing information, and the silane-grafted raw material resin pipe is cut to the length determined by the dimensions adjustment, The ends of the pipes cut to a length corresponding to the design are fused to the secondary side water inlets of the main joints such as the header and cheese that are injection-molded in the mold.

  This fusion can be performed by using a fusion tool with a handle in the shape of a hand bowl as a heating body that can be sandwiched and inserted, or by pressing the end of a pipe against a heated hot plate and melting it at the same time. Join and fuse to the side water inlet. Corresponding pipes are fused to the basic joints required by the piping design information, and the formation of the prefabricated piping member is completed.

  As described above, the forming and fusing process is performed on the basis of the information on the CAD design piping design drawing as described above for the water supply distribution header 2a, the hot water supply distribution header 2b, and the water supply pipe 1a and the hot water supply pipe 1b joined thereto. Each pipe is designed and processed into a predetermined shape with a silane-grafted resin, but the pipe to be welded is cut to a predetermined length by the pipe design, and the length is about 2 to 15 meters. Therefore, the processing can be performed without winding in a coil shape during the cross-linking reaction processing.

  The cross-linking reaction processing for the prefabricated piping member that has been molded is performed by immersing the product that has been molded and fusing the required part in hot water or a steam bath, or passing the product through a fusion pipe. The ambient temperature is 90 ° C. or higher, and heating is performed for about 10 to 15 hours.

  By cross-linking reaction processing, amorphous portions of the chain structure molecules of polyethylene silane-grafted as a raw material resin are bonded to each other to form an ultrahigh molecular weight three-dimensional network structure. When the cross-linking reaction is completed, shape fixing as cross-linked polyethylene is performed, and heat resistance and creep performance are improved.

  Prefabricated piping members that have been fixed in shape by cross-linking reaction processing are packed together with other necessary members based on piping design information, transported to the site, and curve points and rises displayed on the CAD design piping design drawings on site. The piping members are laid and piped based on the laying fixing points such as.

  The piping design of FIG. 1 will be described as an example. First, the water supply distribution header 2a and the hot water distribution header 2b are set and fixed at predetermined positions displayed in the piping design drawing, and the primary side water inlet 21 of the water supply distribution header 2a is melted. The water supply pipe 1a that has been welded and joined is joined to the tap water intake main pipe X, and the hot water supply pipe 1b that is fusion-joined to the primary water inlet 21 of the hot water distribution header 2b is joined to the heated water heater Y.

  Next, the pipes fused and joined to the distribution branch joint ports 22 of the distribution headers 2a and 2b of the hot and cold water supply are respectively joined to the respective terminal faucets, but for kitchens and bathrooms where water and hot water are required. Both water supply and hot water supply are piped, only a water supply pipe 1a is provided for toilets and washing machines that only need water supply, and only a hot water supply pipe 1b is provided for a dishwasher that requires only hot water supply.

  The above is the case where the dimensions of the water supply and hot water supply pipes are adjusted for each site based on the information on the CAD design piping design drawing. The basic piping around the residential water is constructed as a general prefabricated piping, and the piping according to the present invention. By using the member manufacturing method, it is possible to avoid the waste of fusing the joint and the pipe by covering the surface layer of the cross-linked polyethylene core-shaped member as in the case of the conventional electric fusion joint, Prefabricated piping members that can withstand high temperatures and tensile loads can be manufactured.

  Since the present invention is configured as described above, the polyethylene in the fusion bonded part of the joint and the pipe is also cross-linked, so that a stable piping line can be configured against high temperature and tensile load, and the necessary amount of piping suitable for each site. Since the material is delivered to the construction site and piped according to the CAD design piping plan, the cut parts and extra parts of the material that have to be cleaned later are not left on the site. This saves a lot of work and accessories.

The partial enlarged view of the piping design drawing which shows an example of the water piping line by the prefabricated piping member by the Example of this invention Similarly, a plan view of the distribution header embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Piping pipe 1a Water supply pipe 1b Hot water supply pipe 2 Header 2a Water supply distribution header 2b Hot water distribution header 21 Header primary side water inlet 22 Header branch joint port 23 Joint joint mechanism with terminal faucet X Tap water intake Y Heating hot water vessel

Claims (4)

  Check the position of tap water intake, water heater and each terminal faucet based on the house construction basic drawing etc., create a piping design drawing from the header to each terminal faucet, pipes molded with silane grafted resin Cut to the corresponding dimensions in the piping diagram, and fuse it to a joint member such as a header by silane-grafted resin molding using a welding tool etc. Dwelling plumbing method for residential use, characterized in that   A piping pipe and a connecting joint member for connecting and joining the same are formed with a silane-grafted resin, and the piping pipe is inserted into a required portion of the connecting joint member, and is fused and bonded using a welding tool or the like. A method for producing a prefabricated piping member, characterized by performing a cross-linking reaction process after forming the piping member   After the pipe formed from the silane-grafted resin was fused and joined to a joint member such as a header by silane-grafted resin molding using a fusing tool, etc., a cross-linking reaction process was performed Prefabricated piping member characterized by   The measurement cut and fusion bonding of a pipe and header joint member such as a silane-grafted resin are performed based on a piping design drawing or a required standard so as to correspond to a piping design at a specific site. 3. Prefabricated piping member according to 3

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