JP7052015B2 - A tank with an inner container and an outer sleeve and a method for manufacturing the tank. - Google Patents

Description

Background Technique A tank with an inner container and an outer sleeve is proposed. The inner container encloses and / or forms the inner chamber of the tank, the inner container is made of a first material, the outer sleeve encloses the inner container in whole or in part, and the outer sleeve is a second. Consists of materials. In addition, a method of manufacturing a tank is proposed.

Tanks, especially gas tanks for automobiles, are known in the art. Such tanks often have a powder paint coating to avoid corrosion. In order for such tanks to be continuously available to the vehicle, the tanks must be inspected at regular maintenance intervals, which prevents pressure tank failures and may require replacement or additional processing. Will be.

German Patent Application Publication No. 102014003587, as the most similar prior art document, discloses a gas tank for an automobile, which is used as a gaseous fuel under normal conditions. This gas tank has a tank casing used to contain the fuel and at least one safety valve located in the tank casing, through which the fuel can be discharged from the tank, in which case the safety valve , Electrically operable, in which case at least one thermal battery connected to a safety valve is located on the outer surface of the tank casing.

Disclosure of the Invention Within the scope of the present invention, there is proposed a tank provided with an inner container and an outer sleeve, which has the characteristics of claim 1. Further, a method for manufacturing a tank having the characteristics of claim 14 is proposed. An advantageous and / or preferred embodiment of the invention is evident from the dependent claims, the following description and the accompanying drawings.

According to the present invention, a tank including an inner container and an outer sleeve is proposed. The tank is preferably a gas tank, for example a compressed gas tank, and instead the tank is a liquid tank. Among other things, the tank is a tank for natural gas, hydrogen or other fuels. Preferably, the tank is an automotive tank. The tank preferably has a storage volume of more than 10 liters, especially more than 30 liters.

The inner container surrounds and / or forms the inner chamber of the tank. For example, the inner container is formed in a rectangular parallelepiped shape, and instead, the inner container is formed in a cylindrical shape or optionally formed. The inner container is formed and / or made of the first material. The inner container may be uniformly made of one material, and instead the inner container is made of a plurality of materials and / or a composite material. In particular, the inner container has a predetermined wall thickness, and the wall thickness of the inner container is preferably larger than 1 mm, particularly greater than 2 mm. The inner chamber of the tank preferably determines the storage capacity of the tank. In particular, the inner container has an opening that can be closed.

The outer sleeve encloses the inner container entirely and / or partially. In particular, the outer sleeve forms the covering of the inner container. In addition, the outer sleeve is considered the cover of the outer surface of the inner container. The outer sleeve is preferably placed with a slight clearance dimension around the inner container, in which case the clearance dimension is particularly less than 1 millimeter, especially less than 100 micrometers. For example, the inner container is configured as a cylinder, in which case the outer sleeve forms a cylindrical covering surface around the cylindrical inner container.

An intermediate region is located, at least in part, between the inner container and the outer sleeve, in which case the intermediate region is at least partially, preferably completely, provided with a corrosion inhibitor, especially a corrosion inhibitor. It is filled. The corrosion inhibitor may be placed, among other things, completely in the contact area between the outer sleeve and the inner container. Corrosion inhibitors are used specifically to avoid surface corrosion, depression corrosion, hole corrosion and / or gap corrosion. The corrosion inhibitor in the intermediate region preferably has a barrier effect and may additionally have an activating effect by supplying the corrosion inhibitor, in which case the corrosion inhibitor is particularly an inhibitor. Preferably, the intermediate layer is formed from a fluid, such as oil, or a crosslinked film, such as paint, or a crosslinked resin or wax. Particularly preferably, the corrosion inhibitor is a dissolved or solid-bonded inhibitor suitable for the substrate and conditions of use, such as, but not limited to, benzotriazoles, triltriazoles, dicyclohexyls, but not limited to these substances. Includes ammonium / nitrite and dicyclohexylammonium carbonate.

The present invention is based on the idea of providing a tank that minimizes the concentration of maintenance and / or extends the maintenance interval of the tank. In particular, it is considered to provide a tank that eliminates the need for tank replacement within a predetermined operating period of the tank and / or vehicle.

Particularly preferably, the corrosion inhibitor in the intermediate region forms the intermediate layer. The intermediate layer is configured as a liquid film, and in particular, a liquid film is continuously formed. The liquid film consists of, for example, paraffin or mineral oil.

In particular, the intermediate layer made of a liquid film is a liquid film at the operating temperature. In particular, the intermediate layer may be formed as a solid film by cross-linking.

The intermediate region may be configured as a gap in particular. The gap has a predetermined gap dimension. The clearance size is particularly less than 2 millimeters, preferably less than 1 millimeter, especially less than 100 micrometers. The gap has a gap opening in the edge region of the tank or in a supply provided by design. The gap opening is preferably a region where the gap opens to the periphery, for example to the air. Gap openings are used to supply corrosion inhibitors. For example, a liquid anti-corrosion agent is donated to the gap opening, where the anti-corrosion agent is sucked into or flows into the intermediate region, for example by the capillary force generated by surface tension. Such a configuration provides a tank that reduces the potential for corrosion of the inner vessel by closing the openings of the inner vessel that can cause contact with peripheral media such as corrosive and / or moist air. It is based on the idea of doing.

Optionally, it is envisioned that the corrosion inhibitor in the middle layer is bound and / or partially bound by the outer sleeve. For example, the corrosion inhibitor and / or the intermediate layer is adsorbed by the outer sleeve and / or bonded to the outer sleeve by adhesive force. In this case, it is envisioned that the bound corrosion inhibitor will be released, especially if the outer sleeve is deformed and / or damaged. In this case, in particular, it is envisioned that the corrosion inhibitor and / or the intermediate layer will be locally released to the surface of the tank inner chamber in the area near where the outer sleeve is deformed and / or damaged. Such a configuration is based on the idea of providing a tank that reliably blocks corrosion with a corrosion inhibitor in areas where increased corrosion is expected when the outer sleeve is damaged.

Particularly preferably, the intermediate layer is an intermediate layer that is supplied into the gap and / or between the inner container and the outer sleeve, especially by utilizing the capillary force generated due to surface tension. In addition, the capillary force holds the intermediate layer in the gap or in the gap opening, even in the liquid state.

Particularly preferably, the second material is an impact resistant material. Impact resistance is understood to be, in particular, a material having the ability to absorb impact energy. For example, impact resistant materials are elastic and / or deformable materials. In particular, impact resistance can be determined and / or set as Izod impact strength, Charpy impact strength and / or notch impact strength. For example, a second impact resistant material has an Izod impact strength of more than 90 kilojoules per square meter at 23 ° C and a Charpy impact strength of more than 150 kilojoules per square meter at 23 ° C. And / or have a Charpy notch impact strength of more than 50 kilojoules per square meter at 23 ° C. Impact strength is determined specifically on the basis of ISO179. For example, the second material is impact resistant polycarbonate or impact resistant styrene acrylonitrile copolymer. Such a configuration is based on the idea of providing a tank that can reduce the concentration of maintenance by providing an impact-resistant and corrosion-resistant tank with an improved service life. ing. In particular, such tanks, when used in automobiles, can compensate for the impact of stones and / or gravel rolled up during driving without accelerating corrosion of the inner vessel.

Particularly preferably, the second material is a thick layer paint. Alternatively and / or supplementally, the second material is a plastic, especially an elastomer. Further, it may be assumed that the second material is a resin-impregnated cloth. Similarly, as the second material, a knitted fabric made of, for example, plastic may be used.

Optionally, it is assumed that the second material is a foam and / or has a foam portion. In particular, the foaming material is a closed-cell foaming material. Alternatively, the foam material is an open cell foam material, a foam material in which they are mixed, or an integral foam.

Preferably, the foam is a polystyrene-based, polyisocyanate-based, polystyrene and / or polyurethane-based foam.

Particularly preferably, the second material is a metallic material. In this case, in particular, the second material is a soft, deformable metal. Alternatively, the second material is a soft and / or deformable metal alloy. For example, the second material is aluminum. In particular, the metal material may be a metal mesh.

Particularly preferably, the first material is a metal. In particular, the first material may be stainless steel or low alloy heat treated steel. In particular, the first material is an acid resistant and / or basic resistant metal material. In particular, the first material is a flexible metal material. For example, the tank consists of a metal inner container, a corrosion-resistant intermediate layer, and an outer sleeve of plastic and / or foam. Such a configuration is based on the idea of manufacturing a low cost tank that allows for a long service life.

Optionally, the first material is a metal material having a first electrochemical potential, the second material is also a metal, and the second material has a second electrochemical potential. In this case, it is assumed that the first electrochemical potential is larger than the second electrochemical potential. In other words, the first material is a metal that is less likely to corrode than the second material. Such a configuration is based on the idea of providing an exceptionally corrosion resistant tank by preventing the corrosive action of the inner vessel due to contact corrosion.

Particularly preferably, the corrosion inhibitor is colored to make the damage to the outer sleeve visible. For example, corrosion inhibitors include dyes. In particular, the dye may be configured to be visible in normal light, and instead the dye is visible and / or excitable in ultraviolet radiation. For example, if the outer sleeve is damaged, the dye will flow to the damaged area, where the colored corrosion inhibitor will be visible from the outside.

Optionally, it is envisioned that the corrosion inhibitor can occlude and / or seal the damaged portion of the outer sleeve. In this case, for example, a liquid corrosion inhibitor can flow into the damaged portion, where the corrosion inhibitor, for example, comes into contact with air and hardens at the damaged portion, blocking it. Alternatively, the corrosion inhibitor can flow into the damaged portion of the outer sleeve and may be expected to adhere to the damaged portion, eg, repel water.

The method of manufacturing a tank as described above is another object of the present invention. In this case, an outer sleeve made of an impact resistant second material is arranged around the inner container. An intermediate layer as a corrosion inhibitor is placed between the inner container and the outer sleeve. In particular, the intermediate layer is introduced to close the gap between the outer sleeve and the inner container.

Particularly preferably, within the range of the method, an intermediate layer is formed, preferably by immersion of a liquid or gas in the corrosion inhibitor or pouring of the corrosion inhibitor. Also particularly preferably, the corrosion inhibitor and / or the intermediate layer is introduced into the gap and / or between the inner container and the outer sleeve based on the capillary force. Such a configuration is based on the idea of providing a particularly simple way of supplying a corrosion inhibitor between the material of the inner container and the outer sleeve.

Another feature, advantage and action of the invention is evident from the following description of preferred embodiments of the invention.

A tank as an embodiment of the present invention is shown.

FIG. 1 shows a tank 1 as an embodiment of the present invention. The tank 1 has an inner container 2, an outer sleeve 3, and an intermediate layer 4, and the intermediate layer 4 is arranged between the inner container 2 and the outer sleeve 3. The tank 1 is configured to store gaseous or liquid substances, especially compressed gases. The tank 1 is formed, for example, in a cylindrical shape and is tapered in the end region. Attachment 5 is located in the tapered end region, in particular a gas outlet, a safety valve and a pressure sensor. The attachment 5 is used, for example, to allow gas to be released when the positive pressure is excessively high.

The edge region 6 is particularly located in the region where the attachment 5 is arranged. A gap opening is arranged in the edge region 6, and in this case, the gap opening is understood as an opening in the gap between the outer sleeve 3 and the inner container 2 or a filling tube piece. The anti-corrosion agent supplied to the intermediate region particularly closes the gap between the outer sleeve 3 and the inner container 2 and is a layer of anti-corrosion solid against the inner container 2 (eg after cross-linking the resin as paint). ) Or a layer of liquid (eg, an inhibitory liquid film, eg, anticorrosion oil). The intermediate layer 4 has a thickness corresponding to the gap dimension of the gap between the outer sleeve 3 and the inner container 2, in particular. The intermediate layer 4 is, for example, an oily, preferably viscous, oily film between the outer sleeve 3 and the inner container 2.

The outer sleeve 3 is made of a second material, in which case the second material is preferably an impact resistant material. The impact-resistant outer sleeve 3 is elastically deformable and / or is configured to absorb impact energy and disperse the impact energy in the width direction without transmitting it in dots to the inner container 2. There is. The outer sleeve 3 preferably has a thickness greater than 1 millimeter.

The inner container 2 is made of a first material, in which case the first material is a metallic material. Preferably, the first material is a low alloy heat treated steel or aluminum. The first material and / or inner container 2 is particularly airtight to, for example, hydrogen and / or natural gas.

Claims (14)

A tank (1) provided with an inner container (2) and an outer sleeve (3).
The inner container (2) surrounds and / or forms the inner chamber of the tank, and the inner container (2) is made of a first material.
The outer sleeve (3) encloses the inner container (2) in whole or in part, and the outer sleeve (3) is made of a second material.
In tank (1)
An intermediate region is arranged between the inner container (2) and the outer sleeve (3), and the intermediate region is filled with a corrosion inhibitor.
The corrosion inhibitor has the property of blocking damage to the outer sleeve (3).
The tank (1) is characterized in that the corrosion inhibitor is configured to cure the damaged portion of the outer sleeve (3) by coming into contact with air to close the damaged portion. .. The tank (1) according to claim 1, wherein the intermediate region has a gap opening or a separate filling tube piece for supplying the corrosion inhibitor in the edge region (6). The tank according to claim 1 or 2, wherein the corrosion inhibitor forms an intermediate layer (4) in the intermediate region, and the intermediate layer (4) is formed as a liquid film. 1). The corrosion inhibitor of the intermediate layer (4) is provided by the outer sleeve (3) so that when the outer sleeve (3) is deformed and / or damaged, the corrosion inhibitor is locally released. The tank (1) according to claim 3, wherein the tank is coupled. The intermediate layer (4) is characterized in that it is supplied or held between the inner container (2) and the outer sleeve (3) based on the wetting effect, especially based on capillarity. The tank (1) according to claim 3 or 4. The tank (1) according to any one of claims 1 to 5, wherein the second material has impact resistance. The tank (1) according to any one of claims 1 to 6, wherein the second material is a thick layer paint, a plastic and / or an elastomer. The tank (1) according to any one of claims 1 to 7, wherein the second material is a foam material or a fiber net. The tank (1) according to any one of claims 1 to 8, wherein the second material is a metal. The tank (1) according to any one of claims 1 to 9, wherein the first material is a metal or a metal composite fiber. The first material has a first electrochemical potential, the second material has a second electrochemical potential, and the first electrochemical potential is the second electrochemical potential. 10. The tank (1) according to claim 10, which is characterized by being larger than. The tank (1) according to any one of claims 1 to 11, wherein the corrosion inhibitor is colored so that damage to the outer sleeve (3) can be visually recognized. The method for manufacturing the tank (1) according to any one of claims 1 to 12.
An outer sleeve (3) made of a second material is arranged around the inner container (2), and an intermediate layer (as a corrosion inhibitor) as a corrosion inhibitor is placed between the inner container (2) and the outer sleeve (3). 4) The method of arranging. 13. The method of claim 13, wherein the intermediate layer (4) is introduced by pouring and / or by capillary force between the inner container (2) and the outer sleeve (3).

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