JP4631363B2 - Plastic integrated piping - Google Patents

Description

The present invention relates to a resin integrated piping, more specifically, the flow path hardly affected by deterioration such as corrosion or material by the fluid flowing through the space saving by simplifying complex piping, lightweight resin capable Integrated It relates to piping .

  Conventionally, pipes having different thicknesses and lengths are arranged in a complicated manner vertically and horizontally in a mechanical apparatus having many pipes for circulating a fluid, such as an air conditioner or a refrigeration apparatus. For this reason, attaching various devices and parts such as sensors and control devices to these pipes has many space restrictions, and there are problems in terms of maintenance.

  In view of this, there has been proposed a metal integrated pipe that simplifies and downsizes a plurality of pipes as a unit (see, for example, Patent Document 1). In Patent Document 1, a concave portion having a predetermined shape for forming a flow path is formed on a pair of metal plates, and the integrated pipes are manufactured by brazing and joining the metal plates.

  In another proposal, a metal first plate in which a groove serving as a flow path is formed by pressing or precision casting, and a metal second plate in which a communication hole leading to a device to be attached is formed are welded. The integrated pipes are manufactured by joining them together (see Patent Document 2).

However, in both of these proposals, a metal plate is used as the base material of the integrated piping, and the portion that becomes the flow path is made of metal. When such metal integrated pipes are used in, for example, devices and equipment used in fuel cells, chemical plants, food production lines, semiconductor production lines, etc., they are corroded by the fluid flowing through the flow paths of the integrated pipes, or have chemical effects. (For example, metal ions in the flow path portion of the piping are eluted). For this reason, it becomes unusable in a short period of time, resulting in problems such as frequent replacement of the integrated piping and changes in the fluid component flowing through the flow path. In addition, there is a problem that the weight increases.
Japanese Patent Laid-Open No. 11-759 JP 2003-74519 A

An object of the present invention is to provide a resin integrated pipe that is not easily affected by corrosion or material alteration by a fluid flowing through a flow path, and that can simplify a complicated pipe to save space and weight.

In order to achieve the above object, the resin integrated pipe of the present invention is formed by laminating and joining one resin plate having a substantially uniform thickness and the other resin plate having a substantially uniform thickness. It is a resin integrated pipe that forms a flow path, and both plates have grooves, and by laminating and joining both plates by shifting the positions of the grooves, the grooves on one plate and the other plate The planar non-groove portion forms the flow path, and an external communication hole that communicates from the plate to the flow path is provided in the planar non-groove section .

Here, a resin reinforcing material may be mixed into the plate. The plate is made of, for example, polyolefin or fluororesin.

According to the resin integrated pipe of the present invention, one resin plate having a substantially uniform thickness and another resin plate having a substantially uniform thickness are laminated and joined, and a flow path is formed between the laminated plates. As a result , the portion that becomes the flow path is made of resin, and is less susceptible to corrosion, material deterioration, and the like by the fluid flowing through the flow path, and can be used for a long time. Since it is made of resin, it is possible to reduce the weight.

Simplify a complicated piping to the unit, space saving also becomes possible.

Hereinafter, the resin integrated piping of the present invention will be described based on the embodiments shown in the drawings. FIG. 1 is a plan view of a reference embodiment , FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is an assembly diagram showing a component configuration of the resin integrated pipe 1 in FIG. The resin integrated pipe 1 has a structure in which resin plates 2 are stacked and joined, and a flow path 5 is provided between the stacked plates 2a and 2b.

  In FIG. 2, the upper plate 2a has an external communication hole 6 penetrating from one surface to the other surface at a predetermined position, and has a planar shape with a substantially uniform thickness. The lower plate 2b has a groove portion 4 forming a channel 5 having a concave shape on one surface at a predetermined position, and has a substantially uniform thickness.

  As shown in FIG. 3, the surface of the lower plate 2b on which the concave groove 4 is provided faces the upper plate 2a and is laminated and joined so as to close the groove 4. A flow path 5 is formed surrounded by the upper plate 2a.

  At this time, the external communication hole 6 at a predetermined position of the upper plate 2a and the groove 4 (that is, the flow path 5) of the lower plate 2b are joined at a position where they communicate. The external communication hole 6 may be provided after the plates 2a and 2b are stacked.

  On the surface of the upper plate 2a of the resin integrated pipe 1 configured as described above, as shown in FIG. 1, extended tubes 8a and 8b, which are external devices, at the position of the external communication hole 6, sensors 8c, An electromagnetic valve 8 d is mounted, and these external devices 8 a to 8 d and the flow path 5 communicate with each other via the external communication hole 6.

As shown in FIG. 3, two independent plates 2a, not only stacked with 2b, folding the single plate 2 molded integrally to as reference embodiment shown in FIG. 4 laminate You may make it do. When the plate 2 is integrated, cost reduction in the molding and laminating process is possible.

  In the structure of the resin integrated pipe 1, since the flow path 5 is made of resin, it is possible to prevent material deterioration such as corrosion and metal ion elution caused by the fluid flowing through the flow path, which becomes a problem in the metal pipe. . Therefore, it is possible to deal with fluids that are difficult to circulate with metal piping, can be used for a long time, and can be reduced in weight by resin.

  Examples of the resin used for the plate 2 include polyolefins such as polyethylene, polypropylene, polybutene, and polymethylpentene, and polyamides such as nylon 6, nylon 66, nylon 610, nylon 612, nylon 11, nylon 12, nylon 46, and aromatic nylon. , Polytetrafluoroethylene, trifluoroethylene-perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-ethylene copolymer, polyvinylidene fluoride, polychlorotrifluoroethylene, etc. Fluororesin, Polybutylene terephthalate, Polyester such as polyethylene terephthalate, Polyvinyl chloride, Polyacetal, Polyphenylene ether, Polysulfone, Polyether Sulfone, can be used polyphenylene sulfide and the like.

  When the fluid flowing through the flow path 5 is a corrosive fluid such as a strong acid or strong alkali, it is preferable to use a polyolefin or a fluororesin excellent in corrosion resistance. Moreover, in the case of fluids for pure water or food / beverage applications, it is preferable to use polyolefin or fluororesin because low elution of the material components forming the flow path 5 is required.

Further, when the mechanical strength is insufficient with respect to the internal pressure of the flow path 5 or the like, the resin reinforcing material can be mixed into the resin used for the plate 2 to increase the strength. Examples of the resin reinforcing material in this case include glass fibers, carbon fibers, alumina fibers, aramid fibers, boron fibers, fibrous fillers such as PBO (poly-p-phenylenebenzobisoxazole) fibers, carbon, calcium carbonate, clay, Examples thereof include powdery fillers such as silica, flat fillers such as mica, talc and graphite, and spherical fillers such as glass balloons and shirasu balloons. When heat resistance (rigidity at high temperature) is required, the above fibrous filler is preferable.
Each of the plates 2a and 2b can be formed of a single layer of resin, but the multilayer structure may be a structure in which different types of resins, foamed resins, or the like are laminated.

With the structure shown in the above embodiment , complicated piping can be unitized and simplified, space saving and cost reduction can be achieved, and the integration degree of piping can be increased. By shortening the flow path 5, it is possible to prevent a decrease in fluid pressure due to the flow path 5.

  By providing the groove 4 in at least one of the plates 2, it is possible to manufacture the plate 2 by various methods. The external communication holes 6 are provided in one or both of the plates 2, and the external devices 8a to 8 8d can be mounted, and there is an effect that the layout of the external devices 8a to 8d is free.

  For example, in a fuel cell pipe, a fluid that elutes metal ions flows through the flow path 5, and weight reduction and downsizing are strongly demanded. Therefore, the resin integrated pipe 1 having the above effects is preferable. It is.

  The plate 2 can be manufactured by a general resin molding method such as injection molding, press molding, vacuum molding, pressure molding, etc., and the external communication holes 6 of the plate 2 can be formed together during resin molding or resin molding. It can also be formed later.

  By making the plate 2 have a substantially uniform thickness, further weight reduction and cost reduction can be achieved. In order to form the plate 2 having a substantially uniform thickness, vacuum forming, pressure forming, press forming, etc. are suitable. However, if vacuum forming or pressure forming is adopted, the investment in the mold is greatly increased compared to injection molding or press forming. The cost can be reduced significantly. As a result, it is possible to easily cope with small-lot and multi-product production and frequent design changes.

  On the other hand, when the plate 2 is manufactured by injection molding, press molding, or resin cutting, it is possible to cope with a complicated shape, so that the degree of integration of the pipes can be increased and the size can be further reduced.

If the groove part 4 which forms the flow path 5 is provided only in the lower plate 2b and the upper plate 2a is formed in a flat plate shape as in the above embodiment, the flat plate 2a can be easily formed and processed, and the cost is reduced. Can be suppressed. For example, if the plate 2a is manufactured by extruding a resin using extrusion molding and then cutting and drilling the external communication holes 6, the investment in the mold can be significantly reduced.

  Further, when the surface of the plate 2 to which the external devices 8a to 8d are mounted, that is, the surface of the plate 2 having the external communication holes 6 is planar, the external devices 8a to 8d can be easily and stably mounted, The assembly cost can be reduced.

As a modification of the reference form , a resin integrated pipe 1 having a vertical cross-sectional shape as shown in FIG. In this modification, the groove part 4 which forms the flow path 5 is provided only in the lower plate 2b, and the surfaces of both plates 2a and 2b are flat. As a result, the external communication holes 6 are provided in both the plates 2a and 2b, and the external devices 8a to 8d can be stably mounted.

As shown in the reference form, in addition to the structure in which the groove part 4 is provided only on one plate 2, the groove part 4 may be provided on both plates 2a and 2b as in the reference form shown in FIG. . In this reference form , both plates 2a and 2b having a substantially uniform thickness are laminated and joined with the groove portions 4 aligned to form the flow path 5. In the case of this structure, if the portion where the external communication hole 6 is provided is made flat, the external devices 8a to 8d can be attached stably and easily.

As a modification of this reference embodiment , the vertical cross-sectional shape can be the structure shown in FIG. In this modified embodiment, both plates 2 a and 2 b are laminated and joined while shifting the groove 4, and each plate 2 forms a flow path 5 between the grooves 4 of the other plate 2. According to this structure, the external communication hole 6 is provided in the planar portion between the groove portions 4, and the external devices 8a to 8d can be stably attached to both the plates 2a and 2b.

As a reference form as another modification, the longitudinal cross-sectional shape can be a structure shown in FIG. In this structure, one plate 2b has a substantially uniform thickness to reduce weight and cost, while the other plate 2a has a flat surface and is provided with an external communication hole 6, and external devices 8a to 8d are provided. It is easy to install stably.

  For the joining of the plates 2a and 2b, a general method of joining resins, for example, heat welding, adhesion with an adhesive, joining with a joining component, etc. can be used, but from the viewpoint of cost, curing time, joining strength, etc. Therefore, heat welding can be preferably used.

  As heat welding, laser welding and vibration welding can be used to reliably and firmly join. An example of a laser welding method using a general resin welding laser such as a YAG laser will be described with reference to FIG. The stacked plates 2a and 2b are placed on the installation base 9, and a laser transmitting plate that transmits laser light for laser welding such as the glass plate 3 is placed on the upper plate 2a, and both the plates 2a and 2b are pressed from above. Are joined by the laser welding machine 7.

  When the surface of the plate 2 is not flat, it is difficult to firmly press both the plates 2a and 2b, and a special jig for pressure bonding is required. However, at least the surface of one plate 2 is flat. In this case, both the plates 2a and 2b can be easily pressed by the glass plate 3 so that a special jig is not required, man-hours and costs can be reduced, and reliable and strong bonding is possible. It is still preferred that the surfaces of both plates 2a, 2b are planar. Accordingly, the resin integrated pipe 1 shown in FIG. 5 is also suitable for joining by laser welding because both plates 2a and 2b are easily crimped.

  Further, if the upper plate 2a on the laser irradiation side is a laser transmitting resin that transmits laser light for laser welding and the lower plate 2b is a laser absorbing resin that absorbs the laser light, the upper plate 2a is used. It is possible to melt the bonding surface of the lower plate 2b and melt the outer surface of the lower plate 2b and keep the appearance clean.

  The resin integrated pipe 1 of the present invention is not limited to a fuel cell, but is used in a chemical plant, a food production line, a semiconductor production line, etc. that need to circulate a fluid having a large chemical influence such as corrosion on metal. It can be used for various devices and devices.

It is a top view which shows the reference form of the resin integrated piping of this invention (state with which the external device is mounted | worn). It is AA sectional drawing of FIG. FIG. 2 is an assembly diagram illustrating an example of a component configuration and assembly of the resin integrated pipe in FIG. 1. It is an assembly drawing which shows the reference form used as another example of the components structure of the resin integrated piping in FIG. 1, and its assembly. It is a longitudinal cross-sectional view which shows the modification of the resin integrated piping in FIG. It is a longitudinal cross-sectional view which shows the reference form of the resin integrated piping of this invention. It is a longitudinal cross-sectional view which shows embodiment used as the modification of the resin integrated piping in FIG. It is a longitudinal cross-sectional view which shows the reference form used as the other modification of the resin integrated piping in FIG. It is explanatory drawing which shows an example of the manufacturing method of resin integrated piping.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Resin integrated piping 2, 2a, 2b Plate 3 Glass plate 4 Groove part 5 Flow path 6 External communication hole 7 Laser welding machine
8a, 8b Extension tube 8c Sensor, 8d Solenoid valve 9 Installation stand

Claims (3)

A resin integrated pipe in which one resin plate having a substantially uniform thickness and another resin plate having a substantially uniform thickness are laminated and joined, and a flow path is formed between the laminated plates,
Both plates have groove portions, and the flow path is formed by the groove portions of one plate and the planar non-groove portion of the other plate by shifting the positions of the groove portions and laminating and joining both plates. A resin integrated pipe characterized in that an external communication hole that is formed and communicates from the plate to the flow path is provided in the planar non-groove portion. The resin integrated piping according to claim 1 , wherein a resin reinforcing material is mixed into the plate. The resin integrated pipe according to claim 1 or 2 , wherein the plate is made of polyolefin or fluororesin.

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