CN-121986235-A - Pressure vessel and method for manufacturing pressure vessel

Abstract

A pressure vessel is provided with a liner layer (2) comprising a cylindrical trunk portion (21), a head portion (23) provided with a joint (3), and a shoulder portion (22) provided between the trunk portion (21) and the head portion (23) and reduced in diameter toward the head portion (23), and a reinforcing layer (4) formed by winding resin-impregnated fibers around the outer peripheral surface of the liner layer (2), wherein a groove portion (25) is formed in at least one of a first boundary portion (24) that is a boundary between the head portion (23) and the shoulder portion (22) and a second boundary portion (26) that is a boundary between the trunk portion (21) and the shoulder portion (22), and resin oozing from the reinforcing layer (4) enters the groove portion (25).

Inventors

• KAMIYA KEN

Assignees

• 八千代工业株式会社

Dates

Publication Date

20260505

Application Date

20241011

Priority Date

20231115

Claims (3)

1. 1. A pressure vessel, comprising: a lining layer comprising a cylindrical body portion, a head portion provided with a joint, and a shoulder portion provided between the body portion and the head portion and reduced in diameter toward the head portion, and A reinforcing layer formed by winding a fiber impregnated with a resin around the outer circumferential surface of the backing layer, A groove is formed in at least one of a first boundary portion that is a boundary between the head portion and the shoulder portion and a second boundary portion that is a boundary between the trunk portion and the shoulder portion, Resin oozing from the reinforcement layer enters the groove.
2. 2. A pressure vessel as in claim 1 wherein, A thick wall part or a protruding part with a thickness larger than other parts is formed at the first boundary part, The groove is formed on the thick portion or the protruding portion.
3. 3. A method of manufacturing a pressure vessel, comprising: A lining forming step of forming a lining including a cylindrical body portion, a head portion provided with a joint, and a shoulder portion provided between the body portion and the head portion and tapered toward the head portion; A groove forming step of forming a groove in at least one of a first boundary portion that is a boundary between the head portion and the shoulder portion and a second boundary portion that is a boundary between the trunk portion and the shoulder portion; a reinforcing layer forming step of winding the resin-impregnated fiber around the outer peripheral surface of the liner layer to form a reinforcing layer, and And a resin impregnation step of allowing the impregnated resin to enter the groove.

Description

Pressure vessel and method for manufacturing pressure vessel Technical Field The present invention relates to a pressure vessel and a method for manufacturing the pressure vessel. Background A pressure vessel is known which includes a hollow liner layer and a reinforcing layer formed by winding resin-impregnated fibers around the outer peripheral surface of the liner layer (patent document 1). The lining layer includes a cylindrical body portion, a head portion provided with a joint, and a shoulder portion provided between the body portion and the head portion and tapered toward the head portion. The reinforcing layer is formed by winding filaments of a fiber-reinforced resin including a fiber bundle impregnated with the resin around the outer peripheral surface of the backing layer. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2012-246962 Disclosure of Invention Problems to be solved by the invention Since the shoulder portion of the liner layer is formed to be reduced in diameter toward the head portion, there is a problem in that the position of the fiber-reinforced resin is shifted. Particularly, positional displacement tends to occur between the boundary portion between the trunk portion and the shoulder portion and the head portion. The present invention has been made in view of the above, and an object of the present invention is to provide a pressure vessel and a method for manufacturing the pressure vessel, which can prevent a fiber-reinforced resin from deviating from a predetermined position. Technical means for solving the problems The present invention is characterized by comprising a lining layer comprising a cylindrical trunk portion, a head portion provided with a joint, and a shoulder portion provided between the trunk portion and the head portion and tapered toward the head portion, and a reinforcing layer formed by winding a fiber impregnated with a resin around the outer peripheral surface of the lining layer, wherein a groove portion is formed in at least one of a first boundary portion that is a boundary between the head portion and the shoulder portion and a second boundary portion that is a boundary between the trunk portion and the shoulder portion, and the resin oozing from the reinforcing layer enters the groove portion. The present invention is characterized by comprising a lining forming step of forming a lining including a cylindrical body portion, a head portion provided with a joint, and a shoulder portion provided between the body portion and the head portion and tapered toward the head portion, a groove forming step of forming a groove in at least one of a first boundary portion that is a boundary between the head portion and the shoulder portion and a second boundary portion that is a boundary between the body portion and the shoulder portion, a reinforcing layer forming step of winding fibers impregnated with a resin around an outer peripheral surface of the lining to form a reinforcing layer, and a resin impregnating step of allowing the impregnated resin to enter the groove. According to the present invention, the resin oozed out from the reinforcing layer enters the groove portion and is cured, and therefore the reinforcing layer can be fixed to the liner layer. This can prevent positional displacement of the fiber reinforced resin with a simple structure. In addition, it is preferable that a thick portion or a protruding portion having a thickness larger than other portions is formed at the first boundary portion, and the groove portion is formed at the thick portion or the protruding portion. According to the present invention, the strength of the pressure vessel can be prevented from being lowered while preventing the positional deviation of the fiber-reinforced resin. ADVANTAGEOUS EFFECTS OF INVENTION According to the pressure vessel of the present invention, it is possible to provide a pressure vessel and a method for manufacturing a pressure vessel, which can prevent the fiber-reinforced resin from deviating from a predetermined position. Drawings Fig. 1 is a side sectional view of a pressure vessel according to a first embodiment of the present invention. Fig. 2 is an enlarged side sectional view of the periphery of the joint according to the first embodiment. Fig. 3 is an enlarged side sectional view of the periphery of the groove portion according to the first embodiment. Fig. 4 is an enlarged side cross-sectional view of modification 1 of the groove portion of the first embodiment. Fig. 5 is an enlarged side cross-sectional view of modification 2 of the groove portion of the first embodiment. Fig. 6 is an enlarged side cross-sectional view of modification 3 of the groove portion of the first embodiment. Fig. 7 is an enlarged side cross-sectional view of modification 4 of the groove portion of the first embodiment. Fig. 8 is an enlarged side cross-sectional view of modification 5 of the groove portion of th