JPH02241725A - Manufacture of thin-wall steel containing frp pipe - Google Patents

Abstract

PURPOSE:To obtain thin-wall steel containing FRP pipe excellent in water resistance, corrosion resistance and wear resistance by a method wherein fiber reinforced composite material line pipe, which is produced by lining fiber reinforced composite material on the inner peripheral surface of thin-wall steel pipe, is housed in an oven and heated and simultaneously vacuumized for hardening. CONSTITUTION:Under the state that thin-wall steel pipe 13 is seated on a pipe holding roll 14, prepreg, which is wound round a prepreg winding roll 11, is unwound from the prepreg winding roll 11 so as to press a press roll 17 against the holding roll 14 in such a manner that the unwound prepreg is pinched between the press roll and the pipe 13. Under the condition just mentioned above, the pipe holding roll 14 is rotated forward and backward through the predetermined angle so as to paste the prepreg to the bottom part of the inner peripheral surface of the pipe 13 in order to obtain a prepreg-lined pipe 19. Then, the prepreg-lined pipe 19 is removed from the press roll 17. After that, the prepreg-lined pipe 19 under the state being pinched between a small tube 23 and a large tube 25 is placed in a heating oven 27 so as to thermally harden the prepreg of the prepreg-linked pipe 19 by heating and simultaneously vacuumizing the heating oven 27.

Description

[Detailed description of the invention]

The present invention is directed to a fiber-reinforced composite material (Tsume F, simply referred to as FRP) produced using an m# reinforced composite material such as gomphite fiber or carbon fiber. The present invention relates to a method of manufacturing a pipe, and particularly to a method of manufacturing an FRP pipe with thin steel, in which thin steel is provided on the outer surface of the FRP pipe.

[χ Earth-Gumi LF Leap 14 In recent years, various MT-reinforced composite materials such as carbon fiber, graphite fiber, aerospace DF, land transportation, ships, construction and civil engineering 2 industrial parts, electrical g 9 equipment, a fishery It is widely used in various fields such as educational materials and sporting goods. These fiber-reinforced composite materials are used as materials with excellent strength, heat resistance, corrosion resistance, friction, electrical properties, lightness, etc., and using such W1 miscellaneous reinforced composite materials and resins, FRP pipes that are manufactured, for example prepreg molded into a pipe shape and then hardened, are used for construction, for example, in riverbeds.
RPJJ% It is sometimes used as a building, and sometimes used with polling when performing geological Bolin Zo. In such a case, the l"l'l F pipe used has resin exposed on the surface of the FRP vibe, so it has weather resistance, corrosion resistance, water resistance, etc. υ
Raw steel, stainless steel (-I7) has the disadvantage of being slightly inferior.For example, epoxy resin used for general-purpose prep sheets has poor water resistance, and FRP molded using this resin Babs have poor water resistance.Also, as shown in the series, the surface of the FRP pipe has exposed resin L7, so it is exposed to 1 wear. Scratches are also likely to occur.For example, in the case of FRP materials being washed on riverbeds as mentioned above, the surface of the FRP tape is abraded by the quicksand, leading to the problem of frequent pregnancies. In addition, when Fl'IP pipe is used as a poli/glue for filler polysogen, there is severe wear and erosion of the surface, and use 1.':
Sometimes I can't drink sake. ↑Note 12. i4% property and book resistance? tT'ri: t,
3-'#-6f':, ,'lr)! , The surface number of ζFRP pipe, how to apply the polish 7J, but in such a case, the method to proceed 1. For example, the layer thickness is R4! -2・- 1, 2, (-
It is possible to obtain sufficient wear resistance, and in addition, performing step 1 of this method means that the number of days required for application is 12, and the cost is low. )-1-1 No-tei is undesirable.
Since it was made 5 times, so cr) f4's 1; 1:, FRP
Outer surface of the pipe (j1? Thin steel t = -C + durability, corrosion resistance and; 〜Meno6 1-4 The purpose is related to the present invention. D4 eave-forming composite material is applied to the inner circumferential surface of B steel vibrator through L2 through the breather R1 process of ip'. Accommodates fiber-reinforced composite material lined pipe 1,
7. To seal, vacuum 5. A step of sealing the pipe lined with the core fiber-reinforced composite material in the sealing means, heating the sealing means and evacuating the inside of the sealing means to a vacuum state, H steel material FR characterized by comprising a step of hardening the fiber-reinforced composite material of the fiber-reinforced composite material filling pipe in the sealing hand circle.
This is a method for manufacturing P pipe. Point 11 From now on, the present invention will be described based on one embodiment thereof with reference to the accompanying drawings. Referring to FIG. 1, there is shown a device 21to for carrying out the method for manufacturing an FRP pipe with thin steel according to the present invention, and a prepreg P is wound around and held in the center of the device 21to. A roll 11 is provided for winding the prepreg. In this prepreg winding, the roll 1 is formed to have a diameter of 30 mm and a length of about 1200 mm, for example.
This prepreg winding is done on the side and slightly below the roll 11.
Ibi to be pasted on the surface of prepreg P
*L-attached cover film I: Peel off 1a L-c S A film winding roll 12 is provided, and the direction of the device 10 is a thin-walled pipe 13 to which prepreg is pasted on the inner surface. There is a pipe holding roll 14 for holding the power distribution pipe. The roll 12 for winding up the I-1 cover film and the pipe retainer A'-rule 14 each have a diameter of 20 mm and a length τ of about 1200 mrn.
and 50 mm in diameter, 1. It is formed with a diameter of 1200mm. Further, the cover film take-up roll 12 is formed in a cylindrical shape, and the circumferential surface thereof has a diameter of, for example, 1 mm.
A large number of small holes of 50 m ah are drilled in the longitudinal direction at a pitch of 11 m, and the inside of the roll 12 is kept under suction using a vacuum pump or the like.
The cover phytom F4 allows suction to be applied to the roll 12 by negative pressure through its pores. Note that this thin-walled pipe 13 has considerable flexibility in the radial direction 1, and deformation in the radial direction is quite flexible. Auxiliary L1-rules 15 and 16 are disposed on both sides of one side of the luster-1, respectively, for holding the thin-walled vibrator 13 in cooperation with the vibrator holding roll 14. These pipe holding rolls 14, auxiliary rolls 15, and 16, which are formed to have a diameter of approximately 20 mrn and a length of approximately 1200 mm, are moved by a moving device (not shown), and are arranged vertically and horizontally. The position can be freely inspected.On the side facing the pipe holding roll 14, the thin-walled pipe 13 can be pushed against the pipe holding roll 14 while being in contact with this pipe holding roll 14. For this pressing, a roll 17 is disposed, and the surface of the roll 17 is coated with Teflon:1-ting.For this pressing, the roll 17 has a diameter of 1, for example, 20 mm in diameter and a length of about 1200 mm. l, -formed-
There is. One of the above-mentioned blips is wound with a roll of 11° force/
<-Film winding reroll 12, pipe holding port 1 and 14
．． The auxiliary roll 15.16 and the pressing roll 17 each have a diameter of 2.7. It has a rotation axis S that rotates integrally with the lJ-le of h et al. On both ends of these rotating shafts S, there are second
As will be understood with reference to the figure, bearing B
are arranged, and each roll is rotatably supported. Although each of these rolls may be driven to rotate by a knife, a power source such as a motor M is preferably provided to drive the pipe holding roll 14 to rotate. At this time, the prepreg winding roll 11, the auxiliary roll 15, 16, and the push/pull roll 17 are designed to rotate freely. A control device (not shown) is provided for winding the pipe in a suitable manner.The pipe holding roll 14 and the auxiliary roll 15.1
When holding a pipe 13 having a predetermined diameter in L of 6, the pipe holding roll 1 is placed on the bottom surface of this pipe 13.
4 and the auxiliary roll 15, IG are moved by the moving device t so that these rolls are in contact with each other, but this pipe 13 has considerable flexibility in its radial direction,
Furthermore, as mentioned above, the pipe 13 is supported at three points on the bottom surface of the pipe 13 by the three openings of the pipe holding roll 14 and the auxiliary rolls 15 and +6.
By supporting the pipe 13 at three points, the bottom of the pipe 13 can be formed into a partially arcuate shape.
By rotating the pipe 13 5, the entire pipe 13 can be formed into a substantially perfect cylindrical shape with these three roll parts. Thus, by arranging the three rolls 1-1, the pipe holding roll 14, and the auxiliary rolls 15 and 16 at suitable intervals, the bottom of the pipe I3 can be partially shaped into a suitable circular arc. In addition, the arrangement interval of these holes can be changed by: - changing the arc shape of the bottom of the layered pipe 13; Suitable IJ to a certain degree: It has rigidity. Note that when supporting the bottom portions of pipes 13 having different diameters, by changing the arrangement interval of the pipe holding roll 14 and the auxiliary roll 15.1G described above, it is possible to
Depending on the diameter of the rubegi pipe 13, it can be made into a nearly perfect cylindrical state in the same manner as described above, and the arcuate shape of the bottom of the layered pipe 13 can be modified.1. It is possible to have a certain degree of rigidity S+. Note that when the pipe 13 is held by the pipe holding rolls 14 and the auxiliary rolls 15 and 16 and rotated, the pipe 13 may move from these holes during rotation, or In order to prevent the pipe from falling off, a vibe holding float 18 is installed to prevent the pipe from moving laterally.
Referring to FIG. 3, the operation of the embodiment of the present invention will be described below with reference to FIG. Now, when the production equipment N10 for thin steel IFIIP pipes is in operation, a -layer or multi-layer 1. ': Laminated l or soft prepreg P on one side and cover film F on one side.
Prepreg roll with the sheet remaining 1 piece roll 11
8. During this wrapping, the release paper on the other side of the prepreg P is removed, and the prepreg is wrapped with the side of the cover film F remaining on one side of the prepreg P inside. Wrap it around roll 11. That is, at the beginning of S wrapping, the cover film F is wound around the prepreg roll 11 so as to be in contact with the roll 11 (see FIG. 3C). At the beginning of the prepreg winding of the cover film F onto the roll lj, the film F and the prepreg winding are started by fixing the film F and the roll 11 using double-sided tape or the like. When the prepreg P is wrapped around the prepreg winding roll 11, it has flexibility in the radial direction. For example, a length of about 1000 mm formed of 5US304,
Thin steel pipe 13 with an outer diameter of 120 mm and a thickness of approximately 0.5 mm
on the pipe holding roll 14 #: a! ! This pipe holding roll 14. The auxiliary rolls 15 and 16 are moved down by one position using the moving device, and the arrangement position of the Jl. At that time, the bottom surface of the flexible pipe 13 in the direction of the radial force is supported at three points by these rolls], and this part is made into a nearly perfect cylindrical state, and a steel Hold the pipe 13 (see Fig. 3C). After that, the prepreg winding will take the prepreg wrapped around the roll 11, and the prepreg winding will move the film F from the prepreg P to the force of the unwrapped J from the roll 11. Peel it off, and wind the tip of the cover film F around the cover film take-up reroll 12. At this time, the cover film F is sucked through the hole provided in the take-up roll 12, so that the tip of the cover film F is removed from the roll 12 It is easy to attach it, but I am not sure about the first tape.Also, attach the tip of the prepreg P to the auxiliary T call 15" = force position it! ! [Pull out to If (Fig. 3C)
reference). When such a state occurs, the roll 174 is pressed to a position facing the pipe holding roll 14, that is, a predetermined position slightly spaced apart from the pipe holding roll 14 via the pipe 13, and the above-mentioned This pressing places the roll 17 at a predetermined position inside the pipe 13 so as to sandwich the pulled out prepreg with the pipe 13 (see FIG. 3C). This pressing is performed by lowering the roll 17, pinching the pulled out prepreg and pipe 13 with the pipe holding rod 14, and pressing them. After that, by rotating the pipe holding roll 14, the prepreg winding + 1 roll 11 with a hill marked on the bottom of the inner peripheral surface of the pipe 13, which is in a substantially perfect circular state formed by the pipe holding roll 14, the auxiliary roll 15, and the ISK. The tip of the prepreg P pulled out is pressed and fixed (see the third diagram). This push/pull is caused by the vibration 1 at the tip of the prepreg by the roll 17.
3 For pressing and fixing work on the inner peripheral surface, use roll 17 for pressing.
This is achieved by pressing the tip of the prepreg P against the bottom of the inner circumferential surface of the pipe 13. This will be further described with reference to the third diagram. 1. Part 1 holds the pipe l:t-
The inner peripheral surface of the pipe 13 held by the pipe 13 is held between the roll 17 and the pipe holding roll 14 while pressing the roll 17 against the prepreg P. By turning the pipe 13
First, the tip of the prepreg is attached to the bottom of the inner circumferential surface of the pipe 13 by a predetermined length by rotating and reversing a small angle, such as about 10 degrees, as shown in the direction. It is something that is pressed, attached, and fixed. At this time, when the pipe holding roll 14 is rotated, as described above, the auxiliary roll 15.16, Roll 17 for pressing
is driven to rotate. − becomes. A predetermined length of the tip of the prepreg P is attached to the inner peripheral surface of the pipe 13! After gluing, the push roller 17 is pushed against the pipe 13, and the pipe holding roller 14 is rotated and reversed by a predetermined angle. 13 is also rotated and reversely rotated, thereby making it possible to continuously bond the prepreg P supplied by the roll 17 for pressing and from the roll 11 for wrapping the prepreg while pressing it against the bottom of the inner peripheral surface of the pipe 13 ( (See Figure 3E). In other words, when uniformly pasting the prepreg P on the inner peripheral surface of the pipe by i1%, as can be understood by referring to the third diagram, pressing is performed by pressing the pipe holding roll 14 with the roll 17 at a predetermined distance. By rotating and reversing a predetermined angle. That is, due to the operation of the pipe holding roll 14, the pipe 13 moves two steps forward and one step backward, and moves in the direction of the arrow X.
As shown in the direction, the prepreg seeding is rotated five times and reversely, and the prepreg P supplied from the roll 11 is pasted on the bottom of the inner circumferential surface of the pipe 13. In addition, after fixing the tip part as shown in the third diagram, the pipe 13 should not be rotated two steps forward or one step back, nor should it be rotated in the reverse direction, but only slowly rotated in the forward direction and pasted continuously. Good too. At this time, the prepreg P is supplied from the roll 11 to the inner circumferential surface of the pipe for adhesion, and the pipe 13 is rotated to bring the prepreg P into contact with the inner circumferential surface of the pipe L3. When P is pulled, the required amount of prepreg is unwound from the roll 11 and the prepreg material is supplied. At that time, the prepreg is wrapped around the cover film F of the prepreg P supplied from the roll 11.
Take the cover film and peel it off from the prepreg P using the constant torque winding force of the roll 12.
The force exerted by the film F° is taken up on the cover film take-up reroll L2. 1/g P and cover film F may become slack, but as mentioned above, rotate the pipe 13 by a small suitable angle,
Since it is set to rotate in the opposite direction, the prepreg P is reliably stuck to the inner peripheral surface of the pipe 13 as a whole, and the cover film F peeled off from the prepreg P is transferred to the cover film take-up roll 12. The prepreg layer is attached to the inner peripheral surface of the pipe by moving the pipe 13 two steps forward and one step backward as the pipe 13 is wound up. At this time, the air in the Silipreg can also be discharged. Repeating the above steps, the required number of prepregs R are pasted in layers on the inner peripheral surface of the pipe 13 to form a prepreg layer of a predetermined thickness (see FIG. 3F). In this way, the prepreg white talking bar 19 with a predetermined number of sheets of prepreg pasted on the inner circumferential surface of the pipe 13 is pressed by removing the roller 17 from the installation position, and then pressing the pipe holding roll 14. Remove from auxiliary rolls 15, 16 (see Figure 3G). The prepreg protruding from both ends of the taken out prepreg-lined pipe 19 with a width of approximately 1000 mm is cut off with a knife or the like. On the inner peripheral surface of this approximately 1000 mm prepreg lined pipe 19, a length of approximately 1100 mm is attached.
, 4@A release film 20 having a dimension of about 410 mm is attached. At this time, that is, when pasting the release film 20 on the inner surface 1' of the prepreg-lined pipe 19,
11112 film 20 in the inner circumferential direction.
are pasted so that they partially overlap (in this example, about 30 mm). The m-type film 20 protruding from both ends of the prepreg-lined pipe 19 is folded back at both ends to cover the outer surface of the prepreg-lined pipe 19 (see FIG. 3H). The # type film 20-H of the attached prepreg inner pipe 19 is coated with a film slightly ν smaller than the release film 20, for example, with a warp of about 1300 mm.
Freeta Floss 21 with dimensions of mm, width approximately 410 mm (7)
In the same manner as the #-shaped film 20, the bleeder cloth 21 protruding from both ends of the inner prepreg pipe 19 is folded back at both ends to cover the outer surface of the inner prepreg pipe 1<Eve 19. . CFigure 3 0
Tateho). On the other hand, with a vacuum film, for example, the length is 1300Xnm,
A small cylinder 23 with a diameter of about 130 mm is formed. At this time, the overlapping portion of the small cylinder 23 in the longitudinal direction, that is, the axial direction, is sealed with a sealant tape (see Fig. 3, 0). The small cylinder 23 formed in this way is inserted into the IJ 17.
Insert it inside the inner pipe 19 (see Figure 3).
. Furthermore, with a vacuum film, for example, a length of about 1300 mm
, a large cylinder 25 having a diameter of about 140 mm is shaped like I&-1-. At this time, the overlapping portion of the large cylinder 25 in the longitudinal direction, that is, the axial direction, is also sealed using a sealant tape, as in the case of the small cylinder (see the third diagram). Then, put the small circle @ 23 into the large cylinder 25 inside the prepreg inner paste/guive mentioned above, and put the pre/leg inner paste vibe 19 into the small cylinder 23 and the large one. and the cylinder 25 (FIG. 3, 0). In this state, the vacuum valve 26 can be accessed to the large cylinder 25 via a packing or the like Sd. This vacuum valve 26
is connected to a vacuum pump described later. Thousand one. Then, both #A parts of the small cylinder 23 and large cylinder 25 are minced.
Seal with 5-piece tape T. As a result, the prepreg inner vibe 19 is sandwiched between the small cylinder 23 and the large cylinder 25 in a sealed state (see FIG. 3, N1). (as shown in FIG. 3 N2 in detail). Thereafter, the prepreg-lined vibrator 19 sandwiched between the small cylinder 23 and the large cylinder 25 is placed in a heating furnace 27, and the prepreg-lined vibrator 19 is heated to a vacuum, . Vacuum pump 2 installed externally
8 and the lid of the heating furnace 27 is closed to seal the phase heating furnace 27. (Fig. 3, 0). By the way, is it a small cylinder? 3 and the large cylinder 25 is placed in the heating furnace 27, the small cylinder 23 may be foamed and filled with urethane as a filler. Into the small cylinder 23, foam the urethane.
Filling can be carried out by holding both ends of the prepreg-lined vibrator 19 with flat plates (flanges) and foaming urethane inside.This has the effect of further pressing the inner-lined prepreg onto the vibrator 19. It is something that can be brought about. In this state, the heating furnace 27 is activated to perform heating, and the vacuum pump 28 provided outside the heating furnace 27 is activated.
When the is activated and vacuum is drawn through the heating furnace 27 and the vacuum valve 26, the space between the small cylinder z3 and the large cylinder 25 becomes a vacuum state; Therefore, air bubbles existing in the prepreg P can be removed, and since heating is performed in the heating furnace 27, the prepreg in the prepreg lined pipe 19 is heated and hardened. The heating conditions in the heating furnace 27 vary depending on the type of prepreg, that is, the #jIl fiber-reinforced composite material, but in this example, for example, λ of about 130
By heating at °C for about 2 hours, thin steel pipe 1
The prepreg P applied to the inner circumferential surface of the vibrator 13 is cured by heating, and is reliably attached to the vibrator 13, that is, coated. Also, in the small cylinder 23, 1/tan is filled with filler and 1. 11. When the prepreg inner vibrator 19 is filled with the prepreg, this filling material prevents deformation such as distortion of the prepreg inner vibe 19 even after the vacuuming process. can do. Thus, when the prepreg P cured prepreg L/grey speaking vibe 19 is taken out of the heating furnace z7, 5F 11 N
'3 Pipe, that is, a FiIP vibe with thin steel coated on the outer peripheral surface of a fiber-reinforced composite material pipe can be obtained6 1-By going through the steps described above, it becomes homogeneous! Thin steel material F with liIm attached to the outer surface of prepreg E
RP pipe can be manufactured, and BtR pipe can be manufactured.
When attaching the pre-211/g to the inner circumferential surface of the tube (in other words, when coating the prepreg pipe with thin steel), the self-contact R ability of the prepreg is utilized, so a special adhesive is used. There is no rumor that you need FRP.
It is possible to obtain an FRP pipe with thin steel having excellent water resistance, corrosion resistance, and abrasion resistance by coating the outer surface of the vibrator with thin steel. Moreover, 1-11. When manufacturing a thin steel FRP vibrator like this, even if the diameter is relatively small and the diameter is 2', it is easy to manufacture a thin steel FRP vibrator as in the embodiment described above.
Pipes can be manufactured. Complete,” J-Mimihi theory [! 1. As mentioned above, the i-steel FRP of the present invention
According to the manufacturing method of paiz, it is made to adhere homogeneously (, wrinkles,
FIIP pipe with thin steel coated with mir thin steel on the outer surface of prepreg without air bubbles, that is, thin steel+jFRi'' pipe with excellent water resistance, corrosion resistance, and wear resistance is manufactured.7.
- I can do it. With the manufacturing method of #1llll+tFRp pipe of the present invention, it is also possible to manufacture a relatively small diameter and long S steel ÷ f FRP pipe. In addition, it is possible to manufacture pipes with a light diameter because FRP can be attached to the inside of the pipes made of relatively thin steel. Furthermore, according to the present invention, (1) IR RP with thin steel
With the pipe, the surface treatment on the outer surface 1nj can be easily done, for example, 6t on the outer surface! This hard float (-
・When applied to the outer surface, corrosion resistance and abrasion resistance can be improved.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view of an apparatus 1' for manufacturing S steel 41F RP pipe according to the present invention. FIG. 2 is a schematic cross-sectional side view of FIG. 1. FIG. 3 is a flowchart showing each T-culm for manufacturing the FRP vibrator with thin steel according to the present invention. lI Nibbly preg winding + f eyeball 12 Two force bar film winding reroll 13: Thin steel pipe 14: Pipe holding roll 15.16: Auxiliary roll 17; Pressing roll I8: Pressing roller 19; Prepreg inner lined pipe 20: Release Mold film 21; Bleeder cloth 23: Small cylinder 25: Large cylinder 26:

Claims (1)

[Claims] 1) A step of coating the inner peripheral surface of the thin copper pipe with the fiber reinforced composite material through a predetermined process; and a step of coating the inner peripheral surface of the thin copper pipe with the fiber reinforced composite material. encapsulating a means to be evacuated within the sealing means to accommodate and seal the fiber-reinforced composite-lined pipe; and heating the sealing means that sealed the fiber-reinforced composite-lined pipe. and the step of evacuating the inside of the sealing means to a vacuum state to harden the fiber reinforced composite material of the fiber reinforced composite material lined pipe within the sealing means. Method of manufacturing reinforced composite pipe.