JP5610814B2 - Tubular composite and method for producing the same - Google Patents

Description

  The present invention relates to a tubular composite and a method for producing the same.

  Ceramics is excellent in wear resistance, corrosion resistance, and chemical resistance, and is therefore sometimes used as a piping material for transferring materials such as powders, slurries, and corrosive fluids. In recent years, since there is a demand for transferring a fluid in a state where metal contamination is suppressed, ceramics is increasingly used as a material inside the pipe.

  As such a pipe, for example, a plurality of ceramic tube members are prepared, these tube members are arranged and bonded together, and the outer periphery of the bonded portion is reinforced with fiber reinforced resin. Has been proposed (see Patent Document 1).

Japanese Patent Publication No. 4-2094

  However, in the tubular composite of Patent Document 1, when the pipe members are joined together and are to be reinforced with fiber reinforced resin, the pipe member rotates or there is a large gap between adjacent pipe members. There was a problem that it was difficult to assemble.

  Even when assembled, if the bonding strength between the tube members decreases for some reason, the tube members may rotate inside the fiber reinforced resin, and the shape of the tubular composite may not be stably maintained.

  Accordingly, there is a need for a tubular composite that is easy to assemble and that can stably retain its shape after assembly.

Therefore, a tubular composite according to an aspect of the present invention includes a plurality of continuously arranged tube members and a covering that fixes the positions of the plurality of tube members by covering the plurality of tube members. The plurality of tube members each have a flat portion or a concave portion on an outer surface thereof, and when viewed in plan, the plurality of flat portions or concave portions are arranged in a row, and are adjacent to each other. And at least one connecting member for connecting the pipe members to each other, and the connecting member is attached to the flat portion or the concave portion of the pipe member .

  The method for manufacturing a tubular composite according to one aspect of the present invention includes an arranging step of arranging a plurality of tube members each having a flat portion or a recess on an outer surface, and covering the plurality of tube members with a covering. A covering step for fixing the position of the pipe member. In the arranging step, the plurality of tube members are arranged in a state where the flat portions or the concave portions are in contact with a reference surface so that the flat portions or the concave portions are arranged in a line.

  According to the tubular composite of one embodiment of the present invention, assembly is easy and the shape can be stably maintained even after assembly.

According to the method for manufacturing a tubular composite according to one embodiment of the present invention, it is possible to manufacture a tubular composite that is easy to assemble and that can stably retain its shape after assembly.

In the tubular composite according to an embodiment of the present invention, a part of the covering covering the tubular member is represented in cross section for the covering, and a side face in a state where the covering is removed is represented for the tubular member. FIG. (A) is a side view of the pipe member which comprises the tubular composite_body | complex which concerns on one Embodiment of this invention, (b) is a front view. It is a perspective view of the tube member which constitutes the tubular composite concerning one embodiment of the present invention. It is a perspective view which shows the connection state of the several pipe member which comprises the tubular composite body concerning other embodiment of this invention.

Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a schematic view of a tubular composite according to an embodiment of the present invention. The composite tubular body 1 has a plurality of tube members 2 arranged in series and a covering body 3 that fixes the positions of the tube members 2 by covering the plurality of tube members 2. The plurality of tubular bodies 2 are covered and fixed by the covering body 3 except for the openings and the flange 4 portions. In FIG. 1, the plurality of tube members 2 represent side surfaces in a state where the covering body 3 is removed, and the covering body 3 is a cross section of a part of the covering body 3 covering the plurality of tube members 2. Represents. Actually, the portion where the plurality of pipe members 2 are visible is covered with the covering 3 except for the flange portion 4. Each of the plurality of tube members 2 has a flat portion 5 on the outer surface thereof, and when viewed in plan, the plurality of flat portions 5 are arranged in a row.

  In the tubular composite 1 according to the present embodiment, since the plurality of tube members 2 each have the flat portion 5, when the plurality of tube members 2 are covered with the covering body 3, the flat portion 5 is arbitrarily selected as a reference. It can be brought into contact with the surface. The arbitrary reference plane is, for example, a plane parallel to gravity. When the plurality of tube members 2 are covered with the covering 3, the relative positions of the plurality of tube members 2 are fixed by placing the flat portion 5 on the reference surface and arranging the plurality of tube members 2. The covering 3 can be covered in a state. Therefore, assembly of the tubular composite 1 is facilitated. Moreover, since the flat part 5 suppresses rotation of the covering 3, the relative positional change of both is suppressed, and the covering 3 can restrain the some pipe member 2 firmly. In particular, even when stress is applied to the tubular composite body 1, it is possible to suppress the covering 3 from being detached from the plurality of tube members 2 or from being displaced. Therefore, even after the tubular composite 1 is assembled, the shape can be stably maintained. The tube member 2 may have a recess instead of the flat portion 5. Even when the concave portion is formed, the same effect as when the flat portion 5 is formed can be obtained.

  The flat part 5 should just be formed in the outer surface of the pipe member 2 at least one. However, more preferably, as shown in FIGS. 2 and 3, the pair of flat portions 5 are formed so as to face each other through the through hole of the pipe member 2. Thus, when the pair of flat portions 5 are provided so as to face each other with the through hole of the pipe member 2 interposed therebetween, one of the pair of flat portions 5 is brought into contact with an arbitrary reference surface, and the other is The covering 3 can be covered in a state where the cover 3 is arranged to face the reference surface. In this case, the position of the plurality of tube members 2 can be stably fixed by the one flat portion 5, and the covering 3 is more firmly fixed to the tube member 2 by the other flat portion 5. be able to. Therefore, even when a strong stress is applied to the tubular composite body 1, it is possible to suppress a relative change in position between the plurality of tubular members 2, and stably hold the shape of the tubular composite body 1 even after assembly. can do.

  The tube member 2 is not limited to the pair of flat portions 5 and may be provided with three or more flat portions 5. Further, a plurality of pairs of flat portions 5 facing each other with the through hole of the tube member portion 2 interposed therebetween may be provided.

  Further, the arrangement method of the plurality of pipe members 2 is not limited to the arrangement form as shown in FIG. 1, and may be set to an arbitrary form so that the relative position change between the adjacent pipe members 2 does not easily occur. That's fine.

  Since the tubular composite 1 has a plurality of short tube members 2 arranged inside the covering 3, the shape design can be freely performed. For this reason, a large tubular composite, a long tubular composite, and a so-called elbow having a large curvature radius can be easily realized. Moreover, since the coating | coated body 3 can cover those pipe members 2 according to the shape comprised by the some pipe member 2, it does not restrict | limit the shape of the tubular composite body 1. FIG.

  According to the tubular composite 1 according to the present embodiment, the plurality of arranged tube members 2 are covered with the covering 3, and the relative position change between the plurality of tube members 2 can be suppressed. It is possible to suppress an outflow of an object, for example, a fluid that passes through the inside of the pipe member 2 from the joint between the two.

  Moreover, it is preferable that the tubular composite 1 has a structure (not shown) in which the end of one tube member 2 is fitted into the opening of the other tube member 2 among the adjacent tube members 2. Since this tubular composite 1 can narrow or eliminate the gap between adjacent tubular members 2, it is possible to suppress leakage of objects moving inside the tubular composite 1 from between the tubular members 2. Moreover, since the structure which fits the pipe members 2 can be employ | adopted, even when a strong stress is applied from the outside, it is suppressed that the tubular composite body 1 deform | transforms.

  In the tubular composite 1, it is preferable that a plurality of flat portions 5 are continuously arranged. When the plurality of flat portions 5 are continuously arranged, the plurality of tube members 2 can be positioned accurately and quickly in a state where the continuous flat portions 5 are in contact with an arbitrary reference surface. The relative positional accuracy between them improves. Further, when the plurality of flat portions 5 are continuously arranged, the covering body 3 is covered along the continuous flat portions 5, so that the plurality of tube members 2 are further firmly fixed by the covering body 3. . Therefore, the shape of the tubular composite 1 can be stably held even after assembly. Moreover, according to this structure, since the clearance gap between the adjacent pipe members 2 becomes small, what is called a joint becomes small, and it becomes a structure where an impurity does not mix easily into the thing which passes the inner side of the arranged tube members 2. FIG. Here, the phrase “the plurality of flat portions 5 are continuously arranged” means a state in which the adjacent flat portions 5 are connected to each other.

  The covering 3 is made of resin or a composite of resin and fiber, and fiber reinforced resin is particularly preferable. As the resin, an epoxy resin, a vinyl ester resin, a lipoxy resin, a urethane resin, a melamine resin, a phenol resin, an unsaturated polyester resin, or a silicon resin is preferable. The same resin can be selected for the composite of resin and fiber. As a fiber used for the composite of resin and fiber, carbon fiber, glass fiber, aramid fiber, and polyamide fiber are preferable. In particular, the composite of resin and fiber is preferably a fiber reinforced resin called CFRP (Cabon Fiber Reinforced Plastics) or GFRP (Glass fiber reinforced plastics).

  The plurality of pipe members 2 are preferably made of ceramics, and the covering 3 is preferably made of a resin or a composite of resin and fibers. When the inside of the tubular composite 1 is made of ceramics, the tubular composite 1 has a characteristic excellent in wear resistance against powder and the like. In particular, when it is necessary to prevent metal from being mixed into an object transported inside the tubular composite 1, the tube member 2 constituting the inside of the tubular composite 1 is more preferably made of ceramics.

  The ceramic is preferably composed mainly of at least one of alumina, zirconia, ZTA (zirconia-dispersed alumina), silicon nitride, and silicon carbide. When the ceramic is mainly composed of zirconia, ZTA (zirconia reinforced alumina), or silicon nitride, the strength of the ceramic is high, so that the tube member 2 is hardly damaged. When the pipe member 2 is made of zirconia, even if the flange 4 is made of metal, the difference in coefficient of thermal expansion between the pipe member 2 and the flange 4 can be reduced. It is possible to obtain a tubular composite 1 having a pipe member 2 that can suppress cracks and has very good wear resistance.

(Second Embodiment)
FIG. 4 is a perspective view showing a connected state (a state in which a covering body is removed) of a plurality of tube members constituting a tubular composite according to the second embodiment of the present invention. The tubular composite 1 has at least one connecting member 6 that connects adjacent tube members 2 to each other. The connecting member 6 is preferably attached to the flat portion or the recessed portion 5 of the tube member 2. According to this tubular composite body 1, first, the relative positions of the plurality of tube members 2 can be positioned more accurately. Therefore, the covering 3 can be covered in a state where the plurality of pipe members 2 are stably arranged. Further, since the connecting member 6 effectively suppresses the displacement of the covering 3, the plurality of tube members 2 are more firmly fixed by the covering 3. Moreover, in the flat part 5, since the coating | coated body 3 and the pipe member 2 are joined more firmly, peeling of the coating | coated body 3 can be suppressed especially. Further, since the adjacent tube members 2 are connected to each other by the connecting member 6, each tube member 2 becomes more difficult to rotate. Therefore, after assembling the tubular composite 1, the rotation direction of the tube axis of the tube member 2 Even if stress is applied to the tube member 2, the tube member 2 is difficult to rotate, and the shape of the tubular composite 1 can be held more stably.

  The end face of each pipe member 2 may be at a predetermined angle with respect to the flat part 5 as well as when it is perpendicular to the flat part 5. Specifically, when the end surface of the tube member 2 is perpendicular to the flat portion 5 and the angle of the end surface of the tube member 2 with respect to the flat portion 5 is 90 degrees, the end surface of the tube member 2 is flat. 20 degrees or more and 160 degrees or less should just be sufficient with respect to the part 5, More preferably, it is good in it being 70 degrees or more and 110 degrees or less.

  Next, a method for manufacturing the tubular composite 1 will be described. The method for manufacturing the tubular composite 1 includes an arranging step of arranging a plurality of tube members 2 each having a flat portion 5 on the outer surface, and a covering step of covering and fixing the plurality of tube members 2 with a covering 3. In this arrangement step, the plurality of pipe members 2 are arranged in a state where the flat portion 5 is in contact with the reference surface. As described above, when the plurality of pipe members 2 are arranged by bringing the flat portion 5 into contact with an arbitrary reference surface, the positions of the plurality of pipe members 2 are stably fixed, and the covering member 3 is covered on the pipe members 2. Therefore, the arrangement positions of the plurality of tube members 2 are substantially maintained even after the covering 3 is coated. As a result, the tubular composite body 1 in which the relative position accuracy between the plurality of tube members 2 is good and the plurality of tube members 2 are firmly restrained by the covering 3 can be manufactured.

  When the plurality of arranged tube members 2 are viewed in plan, the flat portions 5 are arranged in a row. For this reason, when manufacturing the tubular composite body 1, the tube member 2 does not rotate and can be assembled with the flat portion 5 as a reference surface. Thereby, the adjacent pipe member 2 can be arranged and the tubular composite body 1 of a desired shape can be assembled. According to this manufacturing method, it can manufacture, with the clearance gap between adjacent pipe members 2 small.

When setting the angle which the end surface of the tube member 2 makes with the flat part 5, it is preferable to grind and manufacture the end surface of each tube member 2. Thereby, the clearance gap between the end surfaces of the adjacent pipe members 2 can be substantially eliminated or reduced. The tubular composite body 1 manufactured by grinding the end surface of the pipe member 2 has a very small step on the outer surface between the adjacent pipe members 2.

  It supplements about the preferable manufacturing method of the tubular composite 1. FIG.

  When manufacturing using the ceramics as the pipe member 2, the ceramic is preferably any of alumina, zirconia ceramics, ZTA (zirconia dispersed alumina), silicon nitride ceramics, and silicon carbide ceramics. Any ceramic can produce the tubular composite 1 using a known material.

  When the tubular composite 1 such as a so-called elbow or vent pipe has a bent shape in the longitudinal direction, it is preferable to manufacture the tubular composite 1 as follows. A pipe member 2 having a flat portion 5 formed on the outer peripheral portion is prepared. The flat part 5 is placed in contact with a reference surface having a surface parallel to the direction of gravity. Next, the prepared pipe member 2 is placed in contact with the end face of the pipe member 2 that has already been placed, and the flat portions 5 thereof are flush or substantially flush. The tube members 2 are sequentially placed and arranged. The angle formed by the tube axis directions of the tube members adjacent to each other can be set in a range of −160 ° to 160 °. Preferably, it is in the range of −20 ° to 20 °. As a result, the tubular composite 1 in which the angles formed by the tube axes of the tube members 2 positioned at one end and the other end of the entire tubular composite 1 are, for example, 30 °, 45 °, 60 °, and 90 ° is manufactured. can do.

  When connecting the connection member 6 to the flat part 5, it is preferable to carry out as follows. The connecting member 6 is, for example, a reinforcing band, has a block shape, and is fixed to the tube member 2 with a bolt or the like. Moreover, the connection member 6 may use a tape-shaped thing, and may fix each pipe member 2 so that it may tap and wind. When the connecting member 6 is made of a material that can be elastically deformed, when the tubular member 2 is covered with the covering 3, it is difficult to form a gap between the connecting member 6 and the covering 3, and both the tubular member 2 and the connecting member 6 are used. Can be firmly fixed, which is preferable. The connecting member 6 may be manufactured so as to be further formed in a portion other than the flat portion 5.

After fixing the plurality of tube members 2 with the connection members 6, a covering 3 having a predetermined thickness is coated on the outside of the tube member 2. As the covering 3, those described above can be used. In particular, so-called tow sheets including FRP (fiber reinforced plastics), CFRP or GFRP are used.
Is more preferable. In the case of GFRP, a mat-shaped or sheet-shaped covering 3 can also be used. In this case, it is more preferable that the covering body 3 has adhesiveness because the fixing of the tube members 2 and the covering with the covering body 3 can be performed simultaneously.

  Further, the cover 3 may be formed on the opening side at the end of the pipe member 2 and a metal flange 4 may be attached. More preferably, the flange 4 is covered with the covering 3 after being joined to the pipe member 2.

  Furthermore, after that, the outer periphery of the covering 3 can be further coated to a predetermined thickness using a handlay-up method or a spray-up method. It is preferable to use the handlay-up method or spray-up method, which does not require large-scale equipment, and it is relatively easy to produce a tubular composite regardless of the pipe diameter, pipe length, and curvature. Because it can.

1: Tubular composite 2: Tube member 3: Cover body 4: Flange 5: Flat portion or recess 6: Connection member

Claims (6)

A tubular composite having a plurality of continuously arranged tube members and a covering for fixing the positions of the plurality of tube members by covering the plurality of tube members, wherein the plurality of tube members are: Each of the outer surfaces has flat portions or recesses, and when viewed in plan, a plurality of the flat portions or recesses are arranged in a row ,
A tubular composite having at least one connecting member for connecting adjacent tube members, the connecting member being attached to the flat portion or the recess of the tube member .   The tubular composite body according to claim 1, wherein the plurality of tube members are made of ceramics, and the covering body is made of a resin or a composite of resin and fibers.   The tubular composite according to claim 1 or 2, wherein the plurality of flat portions or recesses are continuously arranged. The tubular composite according to any one of claims 1 to 3 , wherein the plurality of tube members are provided on an outer surface thereof and each have a plurality of flat portions or recesses facing each other with a through hole of the tube member interposed therebetween. body. The adjacent pipe member is a tubular composite according to any one of claims 1 to 4 , wherein an end of one of the pipe members is fitted into an opening of the other pipe member. An arraying step of arranging a plurality of tube members each having a flat portion or a recess on an outer surface; and a covering step of covering the plurality of tube members with a covering and fixing the positions of the plurality of tube members, In the arranging step, a method of manufacturing a tubular composite in which the plurality of tube members are arranged in a state where the flat portions or the concave portions are in contact with a reference surface so that the flat portions or the concave portions are arranged in a line.

Images