JP5419156B2 - Liner for production test of composite container and production test method - Google Patents

Description

  The present invention relates to a liner for manufacturing test of a composite container obtained by winding and reinforcing a fiber material on a liner forming a container, and a manufacturing test method.

In order to store and transport gas such as hydrogen at high pressure, a composite container formed by reinforcing a metal liner with a fiber material is used as a high-pressure cylinder. For manufacturing such a composite container, a FW (filament winding) method is used. After the fiber material is impregnated with a resin, the fiber material is wound around a metal liner that forms the container with an appropriate tension (Patent Literature). 1).
Under the present circumstances, although the intensity | strength of a composite container determines with the conditions of winding, the defect | deletion part which air entered may arise in the reinforcement layer which consists of a fiber material and resin depending on the said conditions.

Since such a defective part causes damage when high-pressure gas is sealed, it is desirable to reduce it as much as possible.
For this reason, in the winding, various factors such as the type and properties of the fiber, the type and properties of the resin, the temperature and tension of the winding must be considered. The relationship between these factors and the defect is first grasped by numerous manufacturing tests.

JP 2007-190697 A

In the manufacturing test described above, manufacturing is performed by changing the winding conditions, the reinforcing layer made of the fiber material and the resin is cut, and the cross section is observed to confirm the defect portion. Therefore, every time the reinforcing layer is cut, the metal liner must be cut.
Therefore, in addition to the difficulty of cutting the metal, the liner had to be discarded for each test, and improvements were required in terms of environment and cost.

  In view of such a situation, it is an object of the present invention to make a liner used for a production test of a composite container recyclable.

In order to solve the above problems, the present invention is a liner used in a production test of a composite container in which a fiber material is wound around a liner forming a container and reinforced, and can be divided and bonded in a predetermined cross section. A production test liner having a split portion is provided and used for a production test of a composite container.
In the method for manufacturing and testing a composite container according to the present invention, at least two divided parts are detachably coupled to form a liner that forms the container, and a fiber material is wound around the liner to be reinforced. Thus, after forming the composite container, the reinforcing layer of the fiber material is cut at the joining position of the divided bodies, and the divided bodies are separated to expose the cut surfaces.

  According to the present invention, if a production test is performed using a liner for production test having a division part that can be divided at a predetermined cross section, the reinforcing layer is cut at the cross section, and the liner is divided. The cross section of the layer can be observed. And this liner can be used for a manufacturing test any number of times by recombining. Further, the composite container manufacturing test method of the present invention has the same effect.

The principal part expanded sectional view of the composite container illustrated about the composite container made into the object of this invention The block diagram of the liner for manufacturing tests which shows 1st Embodiment of this invention FIG. 2 is a cross-sectional view of a composite container formed by winding a fiber material around the production test liner of FIG. Sectional drawing in the division | segmentation part of FIG. 3 (i) or (ii) The perspective view of the liner for manufacture tests which shows a 2nd embodiment of the present invention. The block diagram of the liner for manufacturing tests which shows 3rd Embodiment of this invention The block diagram of the liner for manufacturing tests which shows 4th Embodiment of this invention

Hereinafter, embodiments of the present invention will be described in detail.
The composite container which is the subject of the present invention is such that a fiber material is wound around a metal liner so that it can withstand high-pressure gas inside. More specifically, a metal liner forming the container is provided. The fiber material and resin wound around this are reinforced.
As the fiber to be used, carbon fiber is preferable. In order to wind such a carbon fiber around a liner, it is common to wind the carbon fiber by a FW (filament winding) method.

  The FW method is a method in which a constant tension is applied to the fiber while rotating the liner, and the fiber is wound around a necessary portion. In the wet method, carbon fiber is immersed in a molten resin bath, wound around a liner, and then heated and solidified in a curing furnace. In the case of the dry method, a material called a tow prepreg obtained by impregnating a resin into carbon fiber in advance and semi-solidifying the resin is wound, and then heated and solidified in a curing furnace.

Here, the resin to be used is a curable resin. For example, a thermosetting resin such as an epoxy resin or a photocurable resin is generally used.
The resin and fibers wound in this way form a reinforcing layer 2 around the liner 1 as shown in FIG. The thickness is appropriately changed depending on the purpose of use, the pressure of the gas to be sealed, the size of the liner, the type of reinforcing fiber or resin, etc., but it is preferably about 1 to 10 times the thickness of the liner.

The composite container which is the subject of the present invention can withstand high pressure by the reinforcing layer. However, since such a reinforcing layer is formed of fibers impregnated with a resin, if there is a defect in the resin, the defect becomes a breaking point and may cause destruction when gas is sealed.
FIG. 1 shows an example in which a defect (void) is generated inside the resin of the reinforcing layer 2 including reinforcing fibers around the liner 1.

For this reason, a manufacturing test is performed. That is, in the winding, various factors such as the type and properties of the fiber, the type and properties of the resin, the temperature and tension of the winding are changed, and the reinforcing layer made of the fiber material and the resin is cut. By observing the cross section, the presence or state of the defect portion is examined, and the optimum winding condition is obtained.
The present invention provides a recyclable production test liner so that the metal liner does not have to be cut and discarded in such a production test.

2A and 2B are configuration diagrams of the production test liner according to the first embodiment of the present invention, in which FIG. 2A shows a combined state and FIG. 2B shows a divided state.
The liner 1 is made of metal (for example, aluminum) and has a cylindrical shape in which both ends are rounded and closed in a dome shape. And the base parts 31 and 32 are provided in the dome part of the both ends of the liner 1 main body. The base portions 31 and 32 also serve as a rotating shaft portion for winding the fiber material while rotating the liner 1 main body, and at least one of them is formed by a pipe member and serves as an inlet / outlet of stored gas. .

  Here, the liner 1 has a divided portion S that can be divided and joined in a predetermined cross section, for example, a cross section in the central portion in the axial direction. Specifically, it is divided into two divided bodies 11 and 12 at the central portion in the axial direction, so that one divided body 11 and the other divided body 12 can be attached and detached with each other fitting portions 11a and 12a. It is designed to fit. That is, in this example, the division part S is comprised as fitting part 11a, 12a which fits the division body 11, 12 of the liner 1 so that attachment or detachment is possible. In this example, the fitting portion 11a is a fitting concave portion, and the fitting portion 12a is a fitting convex portion.

FIG. 3 is a cross-sectional view of a composite container in which a reinforcing layer 2 is formed by winding a fiber material around the production test liner 1 of FIG. FIG. 3 shows the detailed shapes of the fitting portions 11a and 12a, and (i) and (ii) are different shapes as different examples. FIG. 4 is a cross-sectional view of the divided portion of FIG. 3 (i) or (ii).
The detailed shape of the fitting portion will be described. For example, in FIG. 3I, the annular member 13 is fixed to the inner peripheral portion of the right divided body 12, and the annular member 13 projects toward the left divided body 11. I'm allowed. Then, the projecting portion of the annular member 13 is used as a fitting convex portion 12a, and is fitted into the fitting concave portion 11a which is the inner peripheral portion of the left divided body 11, whereby the two divided bodies 11 and 12 are coupled to each other.

Further, for example, in FIG. 3 (ii), a fitting recess 11a having a diameter larger than the inner diameter of the liner is formed in the inner peripheral portion of the divided portion of the left divided body 11, and the outer diameter of the liner is formed in the inner peripheral portion of the divided portion of the right divided body 12. A small-diameter fitting convex portion 12a is formed, and the two divided bodies 11 and 12 are joined by fitting the convex portion 12a of the right divided body 12 into the concave portion 11a of the left divided body 11.
Therefore, according to this embodiment, the liner 1 is formed by detachably fitting the one divided body 11 and the other divided body 12, and the reinforcing material is formed by winding the fiber material around the liner 1. By forming 2, a composite container can be manufactured on a trial basis.

  And after manufacture of a composite container, in the fitting position of the division bodies 11 and 12, the reinforcement layer 2 can be cut | disconnected, the division bodies 11 and 12 can be isolate | separated, and a cut surface can be exposed, thereby strengthening The cross section of the layer 2 can be observed and analyzed. And since this liner 1 is only separated into the two divided bodies 11 and 12 without being broken by cutting or the like, it can be used for a manufacturing test any number of times by recombining. .

In particular, according to the present embodiment, since the dividing portion S is provided at the central portion in the axial direction of the cylindrical liner 1, it is possible to observe and analyze a cross section of a portion where the winding state is most easily grasped. become able to. However, it goes without saying that the position where the dividing portion is provided is not limited to this.
In particular, according to the present embodiment, since the divided portion S is configured as a fitting portion that detachably fits the divided bodies 11 and 12 of the liner 1, attachment / detachment is easy and handling is facilitated. However, it goes without saying that the present invention is not limited to the fitting type.

FIG. 5 is a perspective view of a production test liner showing a second embodiment of the present invention.
In the liner of FIG. 5, the dividing portion S is configured as screwing portions 11 b and 12 b that detachably engage the dividing bodies 11 and 12 of the liner 1.
That is, the threaded portion 11b is formed on the outer periphery of the end portion of one divided body 11, and the female screw portion 12b is formed on the inner periphery of the end portion of the other divided body. Of course, it can be separated by operating in the opposite direction. Even if such a screwing means is used, the same effect can be obtained.

In particular, according to the present embodiment, since the dividing portion S is configured as a threaded portion that detachably engages the divided bodies 11 and 12 of the liner 1, there is an advantage that the coupling becomes more reliable. However, it goes without saying that the present invention is not limited to the screw type, and various temporary fixing means can be used.
6A and 6B are configuration diagrams of a production test liner showing a third embodiment of the present invention, in which FIG. 6A shows a combined state and FIG. 6B shows a divided state.

  The liner of FIG. 6 has divided portions S1 and S2 that can be divided and joined in a predetermined cross section, for example, two cross sections in the axial direction. Specifically, by dividing at two locations in the axial direction, it is divided into three divided bodies 21, 22, and 23 so that the three divided bodies 21, 22, and 23 can be attached and detached at each other's fitting portions. It is designed to fit. In this example, fitting convex portions 22 a and 22 a are provided at both ends of the central divided body 22, and these are fitted into fitting concave portions 21 a and 23 a of the left and right divided bodies 21 and 22. In addition, although 21a, 22a, 23a was demonstrated as a fitting part here, it is good also as a screwing part by a screw | thread. Of course, other temporary fixing means may be used.

In particular, according to the present embodiment, since the divided portions S are provided at a plurality of positions in the axial direction of the cylindrical liner 1, it is possible to confirm the state of the defect with more cross sections. However, the number and position of the divided portions are not limited to this, and may be three or more divided portions, or may be provided in the dome portion.
FIG. 7 is a block diagram of a production test liner showing a fourth embodiment of the present invention.

In the liner of FIG. 7, the dividing portion S is provided between the liner 1 main body and the base portion 31 (and 32) at the end thereof. That is, the base part 31 can be separated from the liner 1 body by removably fitting the base part 31 to the liner 1 body by fitting or screwing.
Therefore, by cutting the reinforcing layer in the vicinity of the base part 31 and removing the base part 31, it is possible to examine the state of the missing part in the cross section.

In particular, according to the present embodiment, since the dividing portion S is provided between the liner 1 main body and the base portion 31 (and 32) at the end thereof, the winding state in the vicinity of the base portion where pressure concentration easily occurs. Can be observed and analyzed. Of course, the present invention is not limited to this, and it is only necessary to be able to divide at a part where it is required to observe the state of winding.
Although several embodiments of the present invention have been described above with reference to the drawings, the illustrated embodiments are merely illustrative of the present invention, and the present invention is directly illustrated by the described embodiments. In addition to the above, it goes without saying that various modifications and changes made by those skilled in the art within the scope of the claims (for example, a surface of a metal liner is peeled off or a sheet is stretched) are included.

  The present invention provides a production test liner having a divided portion, and can be used repeatedly without discarding the liner for each test, and is excellent in terms of environment and cost. Is great.

DESCRIPTION OF SYMBOLS 1 Liner 2 Reinforcement layer S, S1, S2 Split part 11, 12 Split body 11a, 12a Fitting part 11b, 12b Screwing part 13 Annular member 21, 22, 23 Split body 21a, 22a, 23a Fitting part (or screw) Joint)
31, 32 Base part

Claims (7)

A liner used for a production test of a composite container in which a fiber material is wound around a liner forming a container and reinforced,
A liner for manufacturing test of a composite container, characterized in that it has a divided portion that can be divided and joined in a predetermined cross section.   The said division part is a liner for a manufacturing test of the composite container of Claim 1 provided in the axial direction center part of a cylindrical liner.   The said division part is a liner for a manufacture test of the composite container of Claim 1 provided in the multiple places of the axial direction of a cylindrical liner.   The liner for manufacturing test of a composite container according to claim 1, wherein the divided portion is provided between a liner main body and a cap portion at an end thereof.   The said division | segmentation part is a liner for a manufacturing test of the composite container as described in any one of Claims 1-4 which is a fitting part which fits the division body of a liner so that attachment or detachment is possible.   The said division | segmentation part is a liner for a manufacturing test of the composite container of any one of Claims 1-4 which is a screwing part which detachably screws the division body of a liner. Releasably connecting at least two divided pieces to form a liner that forms a container;
After manufacturing a composite container by winding and reinforcing fiber material around this liner,
A method for manufacturing and testing a composite container, comprising: cutting a reinforcing layer of the fiber material at a joining position of the divided bodies, separating the divided bodies, and exposing a cut surface.

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