JP2019046673A - Polymer porcelain tube and manufacturing method of polymer porcelain tube - Google Patents

Abstract

To obtain a polymer porcelain tube of which interfacial peeling of an adhesive layer is suppressed.SOLUTION: There is provided a polymer porcelain tube 20 having a flange metal fitting 2 having a cylindrical flange cylindrical part 21 and a flange part 22 expanding to an inner side and an outer side of the flange cylindrical part 21 from one terminal part of the flange cylindrical part 21, a fiber reinforced plastic tube 1 struck by the flange part 22 in an inner peripheral side of the flange cylindrical part 21, an adhesive layer 4 adhering the inner peripheral 23 of the flange cylindrical part 21 and an outer peripheral 1b of the fiber reinforced plastic tube 1, and an outer coating part 5 covering outer periphery parts of the fiber reinforced plastic tube 1 and the flange cylindrical part 21, and having a ceramic layer 3 formed the inner periphery 23 of the flange cylindrical part 21 at a part at least of a zone where the inner periphery 23 of the flange cylindrical part 21 and the outer periphery 1b of the fiber reinforced plastic tube 1 are adhered.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a polymer soot tube that supports a conductor passed through a through hole along an axial direction while insulating it from a partition wall, and a method for producing the polymer soot tube.

The use of polymer pipes with the outer peripheral surface of a fiber reinforced plastic (FRP) cylinder covered with a silicone sheath is lightweight and earthquake-resistant, and therefore is increasingly used. Hereinafter, the fiber reinforced plastic cylinder is referred to as a fiber reinforced plastic cylinder. The polymer soot tube is used for gas insulation equipment using sulfur hexafluoride (SF ₆ ) gas.

  A flange fitting is installed at the end of the polymer soot tube. The polymer pipe disclosed in Patent Document 1 performs lattice-like groove processing on the inner surface of a flange metal fitting, performs spiral groove processing on the outer periphery of a fiber-reinforced plastic cylinder, and applies an adhesive to the outer periphery of the fiber-reinforced plastic cylinder To do. In the polymer rod disclosed in Patent Document 1, a fiber reinforced plastic cylinder is press-fitted into an inner cylinder portion of a flange fitting, an adhesive is cured to form an adhesive layer, and the flange fitting and the fiber reinforced plastic cylinder are joined.

JP 11-329120 A

  However, in the polymer rod disclosed in Patent Document 1, when the degreasing of the inner surface of the flange fitting is insufficient or an oxide film is generated on the metal surface, the adhesive strength between the adhesive layer and the flange fitting decreases. End up. If the adhesive strength between the adhesive layer and the flange bracket decreases, the adhesive layer is likely to delaminate at the interface between the inner surface of the flange bracket and the adhesive layer due to thermal stress and mechanical stress during use. This was the cause of gas leaks in which sulfur hexafluoride gas leaked from the joint with the cylinder.

  This invention is made | formed in view of the above, Comprising: It aims at obtaining the polymer soot tube which suppressed interfacial peeling of the contact bonding layer.

  In order to solve the above-described problems and achieve the object, the present invention includes a cylindrical flange tube portion, and a flange portion projecting from one end of the flange tube portion to the inner peripheral side and the outer peripheral side of the flange tube portion. A flange metal fitting, a fiber reinforced plastic tube abutted against the flange portion on the inner peripheral side of the flange cylindrical portion, an adhesive layer for bonding the inner peripheral surface of the flange cylindrical portion and the outer peripheral surface of the fiber reinforced plastic tube, and fibers A polymer pipe having a reinforced plastic tube and a jacket portion covering the outer peripheral side of the flange tube portion. The present invention has a ceramic layer formed on the inner peripheral surface of the flange cylindrical portion in at least a part of the region where the inner peripheral surface of the flange cylindrical portion and the outer peripheral surface of the fiber reinforced plastic cylinder are bonded.

  According to the present invention, there is an effect that a polymer soot tube in which interfacial peeling of the adhesive layer is suppressed can be obtained.

The longitudinal cross-sectional view of the gas bushing which applied the polymer soot pipe concerning Embodiment 1 of this invention The flowchart which shows the manufacture procedure of the polymer soot pipe which concerns on Embodiment 1. FIG. The figure which shows the structure of the junction part of the ceramic layer and fiber reinforced plastic cylinder of the polymer pipe concerning Embodiment 1 The longitudinal cross-sectional view of the gas bushing which applied the polymer soot pipe concerning Embodiment 2 of this invention The longitudinal cross-sectional view of the gas bushing which applied the polymer soot pipe concerning Embodiment 3 of this invention

  Below, the manufacturing method of the polymer soot pipe and the polymer soot pipe concerning embodiment of this invention is demonstrated in detail based on drawing. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a longitudinal sectional view of a gas bushing to which a polymer soot tube according to Embodiment 1 of the present invention is applied. As shown in FIG. 1, the gas bushing 10 is configured by arranging a conductor 6, which is a current-carrying part, in a polymer soot tube 20 filled with an insulating gas. Here, the insulating gas is an insulating gas containing sulfur hexafluoride gas or sulfur hexafluoride gas. In addition, the gas bushing 10 shows an example of application of the polymer soot tube 20, and the polymer soot tube 20 can be similarly applied to other gas insulating devices.

  As shown in FIG. 1, the polymer rod 20 is made of metal provided on the outer peripheral side of both ends of the fiber reinforced plastic cylinder 1 and the fiber reinforced plastic cylinder 1 in the axial direction. And a jacket portion 5 made of a polymer resin that covers the outer peripheral side of the fiber reinforced plastic cylinder 1 and the flange fitting 2.

  The fiber-reinforced plastic cylinder 1 is provided with a taper on the outer peripheral surface 1b of the end portion 1a on the side abutted against the flange fitting 2. Therefore, the outer diameter of the fiber reinforced plastic cylinder 1 is smaller at the end portion 1a. On the inner peripheral surface of the fiber reinforced plastic cylinder 1, a barrier layer (not shown) having a blocking effect on the insulating gas is formed.

  The flange fitting 2 includes a hollow shaft-shaped flange tube portion 21 and a flange portion 22 formed at the end of the flange tube portion 21. The flange portion 22 includes an inner flange portion 22 a that protrudes toward the center axis of the flange tube portion 21 and an outer flange portion 22 b that protrudes away from the center axis of the flange tube portion 21.

  The inner peripheral surface 23 of the flange cylindrical portion 21 is provided with a taper at the end on the flange portion 22 side. Therefore, the flange cylinder portion 21 has an inner diameter that is smaller toward the end at the end portion on the flange portion 22 side. The taper of the inner peripheral surface 23 is the same as the taper of the outer peripheral surface 1 b of the end 1 a of the fiber reinforced plastic cylinder 1.

  The end 1a of the fiber reinforced plastic cylinder 1 is abutted against the inner flange portion 22a. When the fiber reinforced plastic cylinder 1 is inserted into the flange fitting 2, the fiber reinforced plastic cylinder 1 is positioned by abutting the tapered surfaces.

  The ceramic layer 3 is formed on the inner peripheral surface 23 of the flange cylindrical portion 21. In the first embodiment, the ceramic layer 3 is made of alumina. However, the ceramic constituting the ceramic layer 3 is not limited to alumina.

  An adhesive layer 4 is formed between the ceramic layer 3 and the outer peripheral surface 1 b of the fiber reinforced plastic cylinder 1. Therefore, the ceramic layer 3 and the fiber reinforced plastic cylinder 1 are joined via the adhesive layer 4. In the first embodiment, the adhesive layer 4 is composed of an epoxy adhesive. However, the adhesive constituting the adhesive layer 4 is not limited to the epoxy adhesive.

  The jacket portion 5 is formed of a polymer resin. A plurality of pleats 5a are formed on the surface of the jacket portion 5, and a creeping distance is secured. In the first embodiment, the polymer resin that constitutes the jacket portion 5 is a silicone resin. However, the polymer resin constituting the outer cover portion 5 is not limited to the silicone resin. FIG. 1 is a schematic diagram, and the aspect ratio of the polymer rod 10 is set according to the actual product. Moreover, although the pleats 5a of the jacket portion 5 are illustrated with a shape with a sharp tip, they may have a smooth shape without an edge.

  Next, a method for manufacturing the polymer soot tube 20 according to Embodiment 1 will be described. FIG. 2 is a flowchart showing a procedure for manufacturing the polymer soot tube according to the first embodiment. FIG. 3 is a view showing a structure of a joint portion between the ceramic layer of the polymer soot tube and the fiber-reinforced plastic cylinder according to the first embodiment. In step S <b> 1, sand blasting is performed on the inner peripheral surface 23 of the flange cylindrical portion 21. By performing sandblasting, the inner peripheral surface 23 of the flange cylindrical portion 21 is roughened, and the surface area becomes larger than before sandblasting. Further, the oil and fat adhering to the inner peripheral surface 23 of the flange cylindrical portion 21 and the oxide film on the inner peripheral surface 23 of the flange cylindrical portion 21 are removed by sandblasting, and the inner peripheral surface 23 of the flange cylindrical portion 21 is in a clean state. Become.

  In step S1, cleaning after sandblasting can be simplified by performing sandblasting using the same kind of particles as the thermal spraying that forms the ceramic layer 3 in step S2 described later. As an example, only the removal of particles by air blow can be used. When sandblasting is performed with the same kind of particles as the thermal spraying, even if particles used for sandblasting remain on the inner peripheral surface 23 of the flange cylindrical portion 21, they are taken into the ceramic layer 3 and do not cause defects.

  In step S <b> 2, ceramic spraying is performed on the inner peripheral surface 23 of the flange cylindrical portion 21 to form the ceramic layer 3. Since the inner peripheral surface 23 of the flange metal fitting 2 is roughened by sandblasting, the sprayed ceramic enters a microscopic recess in the inner peripheral surface 23 of the flange cylindrical portion 21. In addition, since the ceramic layer 3 is formed by a thermal spraying method in which particles in a molten state are sprayed, the ceramic layer 3 becomes a rough surface on which irregularities are formed along the inner peripheral surface 23 of the flange cylindrical portion 21 that is a base.

  In step S <b> 3, an adhesive is applied to the inner peripheral surface 31 of the ceramic layer 3 that becomes the inner peripheral surface of the flange cylindrical portion 21. The adhesive enters a microscopic depression on the inner peripheral surface 31 of the ceramic layer 3.

  In step S4, the fiber-reinforced plastic cylinder 1 is inserted into the flange cylinder portion 21 on which the ceramic layer 3 is formed and the adhesive is applied.

  In step S <b> 5, the adhesive is cured to form the adhesive layer 4, and the flange fitting 2 in which the ceramic layer 3 is formed on the inner peripheral surface 23 of the flange cylindrical portion 21 and the fiber reinforced plastic cylinder 1 are interposed via the adhesive layer 4. And join.

  In step S6, the jacket portion 5 is formed.

  Since no oxide film is formed on the inner peripheral surface 31 of the ceramic layer 3, the polymer soot tube 20 according to the first embodiment has the inner peripheral surface of the ceramic layer 3 even if there is a time interval between step S2 and step S3. No interfacial peeling between 31 and the adhesive layer 4 occurs. Moreover, in the polymer soot pipe 20 which concerns on Embodiment 1, the internal peripheral surface 31 of the ceramic layer 3 is a rough surface, and its surface area is larger than the case where it is a smooth surface. Therefore, the adhesive strength is improved as compared with the case where the adhesive layer is formed by applying an adhesive to the inner peripheral surface 23 of the flange cylindrical portion 21 which is a smooth surface. Moreover, since the microscopic unevenness | corrugation of the internal peripheral surface 31 of the ceramic layer 3 is complicated with the contact bonding layer 4, adhesive strength improves by an anchor effect.

  The polymer soot tube 20 according to the first embodiment includes a ceramic layer 3 formed on the inner peripheral surface 23 of the flange cylindrical portion 21 in a region where the inner peripheral surface 23 of the flange cylindrical portion 21 and the fiber reinforced plastic cylinder 1 are bonded. Have Therefore, the polymer soot tube 20 according to Embodiment 1 can increase the adhesive strength between the ceramic layer 3 and the adhesive layer 4, and can suppress interface peeling of the adhesive layer 4.

Embodiment 2. FIG.
FIG. 4 is a longitudinal sectional view of a gas bushing to which a polymer soot tube according to Embodiment 2 of the present invention is applied. In the polymer soot tube 20 of the gas bushing 10 according to the second embodiment, the groove 24 is formed on the inner peripheral surface 23 of the flange cylindrical portion 21, and the ceramic layer 3 is partially formed on the groove 24. The groove 24 is formed in a spiral shape or a lattice shape. The adhesive layer 4 is formed across the inner peripheral surface 31 of the ceramic layer 3 that is the inner peripheral surface of the flange cylindrical portion 21 and the inner peripheral surface 23 of the flange cylindrical portion 21. The rest is the same as that of the polymer soot tube 20 according to the first embodiment.

  In the polymer pipe 20 according to the second embodiment, the inner peripheral surface 23 of the flange cylindrical portion 21 includes a portion where the ceramic layer 3 is formed and a portion where the ceramic layer 3 is not formed. Therefore, a portion where the ceramic layer 3 is formed becomes a convex portion, a portion where the ceramic layer 3 is not formed becomes a concave portion, and macroscopic unevenness is formed on the inner peripheral side of the flange cylindrical portion 21.

  Due to the spike effect caused by the convex portion where the ceramic layer 3 is formed bite into the adhesive layer 4 and the adhesive layer 4 bite into the concave portion where the ceramic layer 3 is not formed, the inner peripheral surface 23 of the flange cylindrical portion 21 and the ceramic layer 3 is prevented from peeling off at the interface between the adhesive layer 4 and the adhesive layer 4.

  The polymer rod 20 according to the second embodiment is a ceramic formed on the inner peripheral surface 23 of the flange cylindrical portion 21 in a part of the region where the inner peripheral surface 23 of the flange cylindrical portion 21 and the fiber reinforced plastic cylinder 1 are bonded. Layer 3 is included. Therefore, the polymer soot tube 20 according to Embodiment 2 can increase the adhesive strength between the ceramic layer 3 and the adhesive layer 4, and can suppress interface peeling of the adhesive layer 4.

Embodiment 3 FIG.
FIG. 5 is a longitudinal sectional view of a gas bushing to which a polymer soot tube according to Embodiment 3 of the present invention is applied. The polymer soot tube 20 of the gas bushing 10 according to Embodiment 3 is different from the polymer soot tube 20 according to Embodiment 1 in that the flange fitting 2 has an inner cylinder portion 25. The inner cylinder part 25 rises in parallel with the flange cylinder part 21 from the inner flange part 22a. The length h2 of the inner cylinder portion 25 is longer than the length h1 of the portion where the taper of the inner peripheral surface 23 is formed.

  The polymer soot tube 20 according to the third embodiment has a contact between the inner peripheral surface 11 of the fiber-reinforced plastic cylinder 1 and the outer peripheral surface 25a of the inner cylindrical portion 25, so that the flange cylindrical portion 21 and the inner cylindrical portion 25 are interposed between each other. Since the fiber reinforced plastic cylinder 1 is sandwiched and positioned, the fiber reinforced plastic cylinder 1 and the flange fitting 2 can be joined smoothly and accurately.

  At the time of manufacturing the polymer tubular tube 20 according to the third embodiment, a nozzle that is thinner than the gap between the flange tube portion 21 and the inner tube portion 25 is inserted between the flange tube portion 21 and the inner tube portion 25 to form the flange tube portion. The ceramic layer 3 is formed on the inner peripheral surface 23 of 21. The ceramic layer 3 may not be formed on a portion of the inner peripheral surface 23 of the flange tube portion 21 near the flange portion 22.

  In the portion where the inner peripheral surface 23 of the flange cylinder portion 21 is tapered, when an axial force is applied to the fiber reinforced plastic cylinder 1, the adhesive layer 4 is perpendicular to the inner peripheral surface 31 of the ceramic layer 3. The power of the ingredient works. Therefore, the adhesive layer 4 is more easily peeled off at the portion where the taper is formed on the inner peripheral surface 23 of the flange tube portion 21 than at the portion where the taper is not formed. Since the polymer hose pipe 20 according to the third embodiment has a length h2 of the inner cylinder portion 25 that is longer than a length h1 of the tapered portion of the inner peripheral surface 23 of the flange cylinder portion 21, the ceramic hose pipe 20 is ceramic. The area where the component force in the direction perpendicular to the inner peripheral surface 31 of the layer 3 does not act on the adhesive layer 4 is enlarged, and the occurrence of gas leak can be suppressed.

  In addition to the anchor effect at the inner peripheral surface 31 of the ceramic layer 3, the polymer soot tube 20 according to the third embodiment has the inner cylinder portion 25 that restricts the movement of the fiber reinforced plastic cylinder 1, and thus the inner circumference of the ceramic layer 3. The effect of suppressing interface peeling between the surface 31 and the adhesive layer 4 can be enhanced.

  The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

  DESCRIPTION OF SYMBOLS 1 Fiber reinforced plastic cylinder, 1a edge part, 1b outer peripheral surface, 2 flange metal fittings, 3 ceramic layer, 4 adhesion layer, 5 jacket part, 5a pleat, 6 conductor, 10 gas bushing, 11, 23, 31 inner peripheral surface, 20 polymer pipe, 21 flange cylinder, 22 flange, 22a inner flange, 22b outer flange, 24 groove, 25 inner cylinder, 25a outer peripheral surface.

Claims (6)

A flange metal fitting having a cylindrical flange tube portion, and a flange portion projecting from one end of the flange tube portion to the inner periphery side and the outer periphery side of the flange tube portion;
A fiber reinforced plastic cylinder abutted against the flange on the inner peripheral side of the flange cylinder,
An adhesive layer for bonding the inner peripheral surface of the flange tube portion and the outer peripheral surface of the fiber-reinforced plastic tube;
A polymer pipe having a jacket portion covering an outer peripheral side of the fiber reinforced plastic tube and the flange tube portion,
A polymer having a ceramic layer formed on the inner peripheral surface of the flange cylindrical portion in at least a part of a region where the inner peripheral surface of the flange cylindrical portion and the outer peripheral surface of the fiber reinforced plastic cylinder are bonded.碍 管. A groove is formed on the inner peripheral surface of the flange tube portion,
The polymer ceramic tube according to claim 1, wherein the ceramic layer is formed in the groove.   The said flange metal fitting has an inner cylinder part extended in parallel with the said flange cylinder part from the said flange part, and the said fiber reinforced plastic cylinder is arrange | positioned between the said flange cylinder parts. The polymer soot tube described in 1. A taper is provided on the outer peripheral surface of the end portion of the fiber-reinforced plastic cylinder that is abutted against the flange fitting, and the inner peripheral surface of the flange fitting end of the flange fitting,
The length of the said inner cylinder part is longer than the length of the part in which the taper of the said internal peripheral surface of the said flange metal fitting was formed, The polymer soot pipe of Claim 3 characterized by the above-mentioned. Sand blasting is applied to the inner peripheral surface of the flange cylindrical portion of the flange fitting having a cylindrical flange cylindrical portion and a flange portion projecting from one end of the flange cylindrical portion to the inner peripheral side and the outer peripheral side of the flange cylindrical portion. A process of performing;
Forming a ceramic layer by thermal spraying on the inner peripheral surface of the flange cylindrical portion;
Applying an adhesive to the inner peripheral surface of the flange tube portion;
Inserting a fiber reinforced plastic cylinder into the flange cylinder and abutting against the flange; and
Curing the adhesive and bonding the inner peripheral surface of the flange tube and the outer peripheral surface of the fiber-reinforced plastic tube;
Forming a jacket portion covering the outer peripheral side of the fiber reinforced plastic tube and the flange tube portion.   The said sandblasting is performed using the same kind of particle | grains as the process of forming the said ceramic layer, The manufacturing method of the polymer soot pipe of Claim 5 characterized by the above-mentioned.

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