Device and method for removing metal lining layer of composite material wrapped around gas cylinder

Abstract

The present application discloses a device and method for removing the metal lining layer of a composite material wrapped gas cylinder. The device comprises a first metal as the main metal component in the main body of the metal lining bottle as an anode component to generate an oxidation reaction; a second metal with lower activity than the first metal as a cathode component; an electroplating solution is contained in the metal lining layer, and the cathode component is arranged in the electroplating solution and does not contact the anode component; a battery assembly, the positive electrode of the battery assembly is electrically connected to the anode component, and the negative electrode of the battery assembly is electrically connected to the cathode component; the anode component, the cathode component, the electroplating solution and the battery assembly form a closed loop. The elimination method uses the device. The device constitutes a primary battery structure, and on the basis of not destroying the composite material layer, the main metal component of the main body of the metal lining bottle is cleverly removed to achieve the lightweight development of the gas cylinder.

Description

Technical Field

[0001] The present application relates to a device and a method for removing a metal lining layer of a composite material wrapped around a gas cylinder, and belongs to the technical field of high-pressure container preparation. Background Art

[0002] A gas cylinder is a hollow storage device. During the production process of the gas cylinder, fiber-reinforced composite materials are usually wrapped around the metal liner.

[0003] Among them, the fiber-reinforced composite material in the gas cylinder plays a leading role in the strength of the gas cylinder, and the metal lining layer mainly provides support during the fiber winding process, and contributes less to the strength of the gas cylinder. At the same time, the mass of the metal lining layer accounts for 20% to 40% of the mass of the entire gas cylinder. As a type of storage device, the composite gas cylinder without liner has significant advantages in weight and cost compared with the gas cylinder with metal liner. Therefore, how to make the gas cylinder structure lightweight and eliminate the metal liner is a research direction for personnel in this field. Summary of the invention

[0004] The present application provides a device and method for removing a metal lining layer of a composite material wrapped around a gas cylinder, so as to solve the problem of how to remove the metal lining layer so as to make the gas cylinder structure lighter.

[0005] The technical solution of this application is as follows:

[0006] According to one aspect of the present application, a device for removing a metal lining layer of a composite material wrapped gas cylinder is provided, wherein the composite material wrapped gas cylinder comprises at least a metal lining layer and a composite material layer wrapped around the outer surface of the metal lining layer, wherein the composite material layer is a non-metallic layer, wherein one end of the composite material wrapped gas cylinder is a sealed end, and the other end is an open end, wherein the metal lining layer sequentially comprises a bottle mouth, a bottle body, and a bottle bottom, wherein a non-metallic connecting portion is provided at a connection between the bottle mouth and the bottle body and at a connection between the bottle bottom and the bottle body, wherein a non-metallic coating is provided on one side of the bottle mouth and the bottle bottom away from the composite material layer, and wherein the bottle body of the metal lining layer comprises a main metal component, including:

[0007] an anode member, wherein the main metal component is a first metal, and the first metal is used as an anode material of the anode member to undergo an oxidation reaction;

[0008] A cathode member, wherein the cathode material of the cathode member is a second metal, the activity of the second metal is lower than that of the first metal, and the cathode member is used to deposit the first metal;

[0009] An electroplating solution, wherein the electroplating solution is contained in the metal lining layer, and the cathode member is disposed in the electroplating solution and is not in contact with the anode member;

[0010] A battery assembly, wherein the positive electrode of the battery assembly is electrically connected to the anode member, and the negative electrode of the battery assembly is electrically connected to the cathode member;

[0011] The anode component, cathode component, electroplating solution and battery assembly form a closed loop.

[0012] The material of the metal lining layer of the gas cylinder is usually a metal alloy, and there is a main metal component in the metal alloy, and its content basically exceeds 50% of the total mass of the metal alloy, which plays a dominant role. In this application, the main metal component of the metal lining layer is used as the anode component, and the plating solution is contained in the metal lining layer of the gas cylinder. A second metal with lower activity than the main metal component is set in the plating solution as the cathode component, and the positive electrode of the battery assembly is electrically connected to the anode component, and the negative electrode of the battery assembly is electrically connected to the cathode component, so that the anode component, the cathode component, the plating solution and the battery assembly form a closed loop to form a primary battery structure to achieve the purpose of sacrificial anode. On the basis of not destroying the composite material layer, the main metal component of the bottle body of the metal lining layer is cleverly removed. In the process of electrolysis reaction of the main metal component, the other metal components of the bottle body of the metal lining layer lose their support, and most of them will be integrated into the plating solution, thereby achieving the purpose of removing the entire bottle body of the metal lining layer. At the same time, in the entire electrolysis reaction process, due to the setting of the non-metallic connecting part and the non-metallic coating, the integrity of the bottle mouth and the bottom of the bottle of the metal lining layer can be retained respectively, and they do not participate in the electrolysis reaction.

[0013] Optionally, the material of the metal lining layer is selected from one of aluminum alloy and stainless steel;

[0014] The main metal component of the aluminum alloy is aluminum. When the first metal is aluminum, the second metal is one of zinc, iron and copper;

[0015] The main metal component of the stainless steel is iron. When the first metal is iron, the second metal is copper.

[0016] Optionally, the electroplating solution includes a metal salt of the first metal.

[0017] If the metal lining layer is an aluminum alloy, the main metal component in the aluminum alloy is aluminum, and the metal salt of aluminum can be aluminum chloride, aluminum sulfate, aluminum nitrate, or aluminum silicate;

[0018] If the metal lining layer is stainless steel, the main metal component of the stainless steel is iron, and the metal salt of iron can be ferric chloride, ferric sulfate, ferric nitrate, or ferric silicate.

[0019] Optionally, the electroplating solution in the metal lining layer is connected to a concentration adjustment component of the metal salt of the first metal, so that the concentration of the metal salt of the first metal is maintained within a certain range;

[0020] Preferably, the concentration adjustment component includes a liquid inlet component and a liquid pumping component, the liquid inlet component includes a first pump component, the first pump component is connected to a metal salt solution of a first metal with a first concentration, so that the metal salt solution of the first metal with the first concentration is pumped into the metal lining layer to form an electroplating solution; the liquid pumping component includes a second pump component, the second pump component is connected to a container, so that the electroplating solution in the metal lining layer is pumped into the container; the first concentration is not lower than the concentration of the metal salt of the first metal of the electrolyte in the metal lining layer.

[0021] Through the concentration regulating component, the metal salt solution of the first metal in the metal lining layer of the gas cylinder can be maintained within a certain range of concentration. As the anodic electrolysis process proceeds, the concentration of the metal ions of the first metal in the electrolyte will gradually decrease. This is because the metal ions of the first metal are reduced to metal atoms and electroplated and deposited on the cathode surface, thereby reducing the concentration of the metal ions of the first metal in the electroplating solution. The concentration of the metal ions of the first metal is related to the electroplating speed. During the electroplating process, the higher the concentration of the metal ions of the first metal in the electroplating solution, the faster the electroplating speed. This is because the reduction reaction rate of the metal ions of the first metal on the cathode surface depends on the concentration of the metal ions of the first metal. When the concentration of the metal ions of the first metal in the electroplating solution is low, the electroplating speed will slow down or even stop. Therefore, a concentration regulating component is set to maintain the metal salt of the first metal in a certain range of concentration to ensure that the electrolysis reaction proceeds normally.

[0022] Optionally, an interface layer is provided between the metal lining layer and the composite material layer; preferably, the interface layer is a plasma deposition layer. The plasma deposition layer is relatively dense, and the precursor of the plasma deposition layer can be a ceramic material, which does not react with the electroplating solution and has a good protective effect on the composite material layer, such as silicon nitride ceramics and silicon carbide ceramics.

[0023] Optionally, the elimination device further includes a slide, the slide has a groove, the groove is engaged with the open end of the composite material wrapped gas cylinder, so that the slide moves circumferentially along the open end; the slide has a through hole, the positive electrode of the battery assembly is connected to the anode member through the conductive wire passing through the through hole, so that the conductive wire is connected to different positions of the anode member as the slide moves. Since the metal lining layer is an annular curved surface structure, its anode material cannot react simultaneously during the electrolysis reaction. In order to ensure that all anode materials participate in the reaction, a slide is provided to allow the positive electrode of the battery assembly to contact different positions of the anode member.

[0024] According to another aspect of the present application, based on the above-mentioned elimination device, a method for eliminating a metal lining layer of a composite material wrapped around a gas cylinder is provided, and the elimination method comprises the following steps:

[0025] S1. The main metal component of the metal lining layer is limited to a first metal, the first metal is used as an anode member, and the anode member undergoes an oxidation reaction;

[0026] S2. Selecting a second metal having a lower activity than the first metal as a cathode member, the cathode member being used to deposit the first metal;

[0027] S3. Pour the plating solution into the metal liner layer, and place the cathode member in S2 in the plating solution without contacting the anode member;

[0028] S4. The positive electrode of the battery assembly is electrically connected to the anode component, and the negative electrode of the battery assembly is electrically connected to the cathode component, so that the anode component, the cathode component, the electroplating solution and the battery assembly form a closed loop.

[0029] Optionally, the electroplating solution includes a metal salt of the first metal.

[0030] Optionally, the material of the metal lining layer is selected from one of aluminum alloy and stainless steel;

[0031] The main metal component of the aluminum alloy is aluminum. When the first metal is aluminum, the second metal is one of zinc, iron and copper;

[0032] The main metal component of the stainless steel is iron. When the first metal is iron, the second metal is copper.

[0033] According to another aspect of the present application, a composite material wrapped gas cylinder is provided, which is prepared by any of the above elimination methods, wherein the composite material wrapped gas cylinder at least comprises a metal lining layer and a composite material layer wrapped around the outer surface of the metal lining layer, wherein the composite material layer is a non-metallic layer, one end of the composite material wrapped gas cylinder is a sealed end, and the other end is an open end, wherein the metal lining layer comprises a bottle mouth portion arranged inside the open end and a bottle bottom portion arranged inside the sealed end, wherein the bottle mouth portion is not connected to the bottle bottom portion, a non-contact surface between the bottle mouth portion and the composite material layer is provided with a non-metallic layer, and a non-contact surface between the bottle bottom portion and the composite material layer is also provided with a non-metallic layer;

[0034] Preferably, the non-metallic layer is a graphene material layer.

[0035] The beneficial effects of this application include but are not limited to:

[0036] 1. According to the device for removing the metal lining of the composite material wrapped gas cylinder of the present application, the main metal component of the metal lining layer is used as the anode component, and the electroplating solution is contained in the metal lining layer of the gas cylinder. A second metal with lower activity than the main metal component is set in the electroplating solution as the cathode component. The positive electrode of the battery assembly is electrically connected to the anode component, and the negative electrode of the battery assembly is electrically connected to the cathode component, so that the anode component, the cathode component, the electroplating solution and the battery assembly form a closed loop to form a primary battery structure to achieve the purpose of sacrificial anode. On the basis of not destroying the composite material layer, the main metal component of the bottle body of the metal lining layer is cleverly removed. In the process of electrolysis reaction of the main metal component, the other metal components of the bottle body of the metal lining layer lose their support, and most of them will be integrated into the electroplating solution, thereby achieving the purpose of removing the main part of the metal lining layer. At the same time, in the whole electrolysis reaction process, due to the setting of the non-metallic connecting part and the non-metallic coating, the integrity of the bottle mouth and the bottom of the bottle of the metal lining layer can be retained respectively, and they do not participate in the electrolysis reaction.

[0037] 2. According to the device for eliminating the metal lining layer of the composite material wrapped gas cylinder of the present application, by setting a concentration adjustment component, the metal salt solution of the first metal in the metal lining layer of the gas cylinder can be maintained within a certain range of concentration. As the anodic electrolysis process proceeds, the concentration of the metal ions of the first metal in the electrolyte will gradually decrease. The metal ions of the first metal are reduced to metal atoms and electroplated and deposited on the cathode surface, thereby reducing the metal ion concentration of the first metal in the electroplating solution. The concentration of the metal ions of the first metal is related to the electroplating speed. During the electroplating process, the higher the concentration of the metal ions of the first metal in the electroplating solution, the faster the electroplating speed. This is because the reduction reaction rate of the metal ions of the first metal on the cathode surface depends on the concentration of the metal ions of the first metal in the electroplating solution. When the concentration of the metal ions of the first metal in the electroplating solution is low, the electroplating speed will slow down or even stop. Therefore, a concentration adjustment component is set to maintain the metal salt of the first metal within a certain range of concentration to ensure the normal progress of the electrolysis reaction. At the same time, the concentration adjustment component can adjust the amount of the electroplating solution in the metal lining layer so as to observe the position of the unreacted anode material, so as to facilitate the adjustment of the position of the positive electrode of the battery component and the unreacted anode material.

[0038] 3. According to the device for eliminating the metal lining layer of the composite material wrapped around the gas cylinder of the present application, a slider is set, and the groove of the slider can enable the slider to move circumferentially along the open end of the gas cylinder. The perforations on the slider can adjust the positive electrode of the battery assembly to contact the anode material at different depths in the gas cylinder, so that the anode materials at different positions can obtain electrolysis reaction.

[0039] 4. According to the method for removing the metal lining layer of a composite material wrapped gas cylinder of the present application, the main metal component of the metal lining layer is used as the anode component, and a plating solution is contained in the metal lining layer of the gas cylinder. A second metal with lower activity than the main metal component is set in the plating solution as the cathode component. The positive electrode of the battery assembly is electrically connected to the anode component, and the negative electrode of the battery assembly is electrically connected to the cathode component, so that the anode component, the cathode component, the plating solution and the battery assembly form a closed loop to constitute a primary battery structure to achieve the purpose of a sacrificial anode. Without destroying the composite material layer, the main metal component of the bottle body of the metal lining layer is cleverly removed. In the process of the electrolysis reaction of the main metal component, the other metal components of the metal lining layer lose their support and most of them will be integrated into the plating solution, thereby achieving the purpose of removing the entire bottle body of the metal lining layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0041] Figure 1 This is a schematic diagram of the structure of a device for removing a metal lining layer according to an embodiment of the present application.

[0042] Figure 2 This is a schematic diagram of the structure of a composite material wrapped gas cylinder involved in an embodiment of the present application.

[0043] Figure 3 It is a schematic diagram of the structure of the sliding member involved in the embodiment of the present application.

[0044] Reference numerals:

[0045] 1. Gas cylinder, 11. Composite material layer, 12. Metal lining layer, 121. Bottle mouth, 122. Bottle body, 123. Bottle bottom, 124. Non-metallic connection part, 125. Non-metallic coating;

[0046] 2. Elimination device, 21. Anode component, 22. Cathode component, 23. Electroplating solution, 24. Battery assembly;

[0047] 31. Liquid inlet assembly, 311. First pump assembly, 32. Liquid extraction assembly, 321. Second pump assembly, 322. Container;

[0048] 4. Slide, 41. Groove, 42. Perforation. DETAILED DESCRIPTION

[0049] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0050] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0051] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0052] In addition, in the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0055] The embodiment of the present application discloses a device for removing the metal lining layer of a composite material wrapped around a gas cylinder, such as Figure 1 and Figure 2As shown, the composite material wrapped gas cylinder 1 at least includes a metal lining layer 12 and a composite material layer 11 wrapped around the outer surface of the metal lining layer 12, the composite material layer 11 is a non-metallic layer, one end of the composite material wrapped gas cylinder 1 is a sealed end, and the other end is an open end, the metal lining layer 12 includes a bottle mouth 121, a bottle body 122 and a bottle bottom 123 in sequence, and a non-metallic connecting portion 124 is provided at the connection between the bottle mouth 121 and the bottle body 122 and at the connection between the bottle bottom 123 and the bottle body 122, a non-metallic coating 125 is provided on the side of the bottle mouth 121 and the bottle bottom 123 away from the composite material layer 11, the bottle body 122 of the metal lining layer 12 includes a main metal component, and the elimination device 2 includes a closed loop consisting of an anode 21, a cathode 22, an electroplating solution 23 and a battery assembly 24. Furthermore, the main metal component is a first metal, and the first metal is used as the anode material of the anode component 21 to undergo an oxidation reaction; the cathode material of the cathode component 22 is a second metal, and the activity of the second metal is lower than that of the first metal, and the cathode component 22 is used to deposit the first metal; the electroplating solution 23 is contained in the metal lining layer 12, and the cathode component 22 is arranged in the electroplating solution 23 and does not contact the anode component 21; the positive electrode of the battery assembly 24 is electrically connected to the anode component 21, and the negative electrode of the battery assembly 24 is electrically connected to the cathode component 22; the anode component 21, the cathode component 22, the electroplating solution 23 and the battery assembly 24 form a closed loop.

[0056] As an implementation mode, the composite material wrapped gas cylinder 1 in the above embodiment can be a slender tubular gas cylinder, but is not limited to a slender tubular gas cylinder. The cathode component 22 can be directly placed on the central axis of the inner cavity surrounded by the metal lining layer 12 of the slender tubular gas cylinder 1, so that the longitudinal dimension from the cathode component 22 to the inner wall of the metal lining layer 12 remains consistent, so as to ensure that the anode material on the metal lining layer 12 reacts uniformly as much as possible.

[0057] As an implementation mode, the cathode component 22 in the above embodiment is a cylindrical structure, and a non-metallic support frame can be set at the bottom of the cathode component 22, which is fixed in the inner cavity surrounded by the metal lining layer 12 to avoid direct contact with the anode material.

[0058] The composite material mentioned in this application can be a single or mixed fiber with a thermosetting resin bonded to the surface; the mixed fiber can be but not limited to the following, such as carbon fiber, PBO fiber, aromatic polyamine fiber and ultra-high molecular weight polyethylene fiber. The composite material has excellent characteristics such as high strength, high modulus, high stiffness, excellent vibration damping, fatigue resistance and corrosion resistance.

[0059] The material of the metal lining layer 12 of the gas cylinder is usually a metal alloy, such as aluminum alloy and stainless steel. There is a main metal component in the metal alloy, and its content basically exceeds 50% of the total mass of the metal alloy, which plays a dominant role. In this application, the main metal component of the bottle body 122 of the metal lining layer 12 is used as the anode component 21, and the electroplating solution 23 is contained in the metal lining layer 12 of the gas cylinder 1. The second metal with lower activity than the main metal component is set in the electroplating solution 23 as the cathode component 22, the positive electrode of the battery assembly 24 is electrically connected to the anode component 21, and the negative electrode of the battery assembly 24 is electrically connected to the cathode component 22. The cathode component 22 is electrically connected, so that the anode component 21, the cathode component 22, the electroplating solution 23 and the battery assembly 24 form a closed loop to constitute a primary battery structure to achieve the purpose of a sacrificial anode. On the basis of not destroying the composite material layer 11, the main metal component of the bottle body 122 of the metal lining layer 12 is cleverly removed. In the process of the electrolysis reaction of the main metal component, the other metal components of the bottle body 122 of the metal lining layer 12 lose their support, and most of them will be integrated into the electroplating solution 23, thereby achieving the purpose of removing the entire main part of the metal lining layer 12. In addition, during the entire electrolytic reaction process, due to the arrangement of the non-metallic connection part 124 and the non-metallic coating 125, the integrity of the bottle mouth 121 and the bottle bottom 123 of the metal lining layer can be retained respectively, and they do not participate in the electrolytic reaction. The arrangement of the non-metallic connection part 124 makes it possible for the bottle mouth 121 and the bottle body 122, and for the bottle bottom 121 and the bottle body 122 to not directly contact each other. The non-metallic coating 125 can isolate the electroplating liquid from the bottle mouth 121 and the bottle bottom 123, thereby making the bottle mouth 121 and the bottle bottom 123 of the metal lining layer not participate in the electrolytic reaction. As an embodiment, the material of the metal lining layer 12 is selected from one of aluminum alloy and stainless steel; the main metal component of the aluminum alloy is aluminum, and when the first metal is aluminum, the second metal can be one of zinc, iron, and copper; the main metal component of the stainless steel is iron, and when the first metal is iron, the second metal can be copper.

[0060] As an embodiment, the electroplating solution 23 includes a metal salt of the first metal, and the metal salt is used to provide a metal ion source. When the first metal is aluminum, the metal salt of aluminum can be aluminum chloride, aluminum sulfate or aluminum nitrate. When the first metal is iron, the metal salt of iron can be ferric chloride, ferric sulfate or ferric nitrate. The electroplating solution 23 also includes a conductive salt, an acid, a buffer and an anode activator. The conductive salt can be a chloride of sodium, potassium or ammonium, which is used to reduce the consumption of electrical energy; the acid is used to adjust the pH of the solution; the buffer is used to stabilize the pH value of the solution, and can be a borate, acetate, or citrate. The anode activator promotes anode dissolution and increases anode current density, and can be an ammonium salt.

[0061] As an implementation method, refer to Figure 1, the electroplating solution 23 in the metal lining layer 12 is connected to a concentration adjustment component of the metal salt of the first metal, so that the metal salt of the first metal is maintained in a certain range of concentration. Further, the concentration adjustment component includes a liquid inlet component 31 and a liquid extraction component 32, the liquid inlet component 31 includes a first pump component 311, the first pump component 311 is connected to a metal salt solution of the first metal with a first concentration, so that the metal salt solution of the first metal with a first concentration is sucked into the metal lining layer 12; the liquid extraction component 32 includes a second pump component 321, the second pump component 321 is connected to a container 322, so that the electroplating solution 23 in the metal lining layer 12 is sucked into the container 322; the first concentration is not lower than the concentration of the metal salt of the first metal of the electrolyte in the metal lining layer 12. By setting a concentration regulating component, the metal salt solution of the first metal in the metal lining layer 12 of the gas cylinder 1 can be maintained within a certain range of concentration. As the anodic electrolysis process proceeds, the concentration of the metal ions of the first metal in the electrolyte will gradually decrease, and the metal ions of the first metal will be reduced to metal atoms and electroplated and deposited on the surface of the cathode 22, thereby reducing the concentration of the metal ions of the first metal in the electroplating solution. The concentration of the metal ions of the first metal is related to the electroplating speed. During the electroplating process, the higher the concentration of the metal ions of the first metal in the electroplating solution 23, the faster the electroplating speed. The reduction reaction rate of the metal ions of the first metal on the cathode surface depends on the concentration of the metal ions of the first metal in the electroplating solution 23. When the concentration of the metal ions of the first metal in the electroplating solution 23 is low, the electroplating speed will slow down or even stop. Therefore, a concentration regulating component is set to maintain the metal salt of the first metal within a certain range of concentration to ensure the normal progress of the electrolysis reaction. At the same time, the concentration adjustment component can adjust the amount of the electroplating solution 23 in the metal lining layer 12 so as to observe the position of the unreacted anode material, thereby facilitating the adjustment of the position of the positive electrode of the battery component 24 and the unreacted anode material.

[0062] As an embodiment, an interface layer is provided between the metal lining layer 12 and the composite material layer 11; preferably, the interface layer is a plasma deposition layer. The plasma deposition layer is relatively dense, and the precursor of the plasma deposition layer can be a ceramic material, which does not react with the electroplating solution 23 and has a good protective effect on the composite material layer 11. The ceramic material can be a ceramic that does not contain metal elements, such as silicon nitride ceramics and silicon carbide ceramics.

[0063] Since the metal lining layer 12 is a ring-shaped curved surface structure, the anode materials thereof cannot react completely at the same time during the electrolytic reaction. To ensure that all anode materials participate in the reaction, Figure 3The elimination device 2 also includes a slide 4, which is provided with a groove 41, and the groove 41 is embedded in the open end of the composite material wrapped gas cylinder 1, so that the slide 4 moves circumferentially along the open end; a through hole 42 is provided on the slide 4, and the positive electrode of the battery assembly 24 is connected to the anode member 21 through the conductive wire passing through the through hole 42, so that the conductive wire is connected to different positions of the anode member 21 as the slide 4 moves, thereby ensuring that all anode materials can participate in the reaction.

[0064] Furthermore, the slide 4 is made of rubber, the width of the opening of the groove 41 is not greater than the thickness of the side wall of the gas cylinder 1, and the rubber material has a slow elasticity, so that the groove 41 can fit the open end of the gas cylinder 1 without affecting the movement of the slide 4.

[0065] Another embodiment of the present application provides a method for removing a metal lining layer of a composite material wrapped around a gas cylinder based on the removal device provided in the above embodiment. The removal method comprises the following steps:

[0066] S1. The main metal component of the metal liner layer is limited to the first metal, the first metal is used as the anode member 21, and the anode member 21 undergoes an oxidation reaction;

[0067] S2. A second metal having a lower activity than the first metal is selected as the cathode member 22, and the first metal undergoes a reduction reaction at the anode member 21 to be deposited on the cathode member 22;

[0068] S3. Pour the plating solution 23 into the metal liner layer, and place the cathode member 22 in S2 in the plating solution 23 without contacting the anode member 21;

[0069] S4. The positive electrode of the battery assembly 24 is electrically connected to the anode component 21, and the negative electrode of the battery assembly 24 is electrically connected to the cathode component 22, so that the anode component 21, the cathode component 22, the electroplating solution 23 and the battery assembly 24 form a closed loop.

[0070] In steps S1 and S2, the material of the metal lining layer is selected from one of aluminum alloy and stainless steel; the main metal component in the aluminum alloy is aluminum, when the first metal is aluminum, the second metal can be one of zinc, iron, and copper; the main metal component in the stainless steel is iron, when the first metal is iron, the second metal can be copper.

[0071] In step S3, taking the example that the material of the metal lining layer is selected from stainless steel, the first metal is iron, and the electroplating solution 23 includes ferric chloride (metal salt of the first metal), sodium chloride (conductive salt), acid, buffer and anode activator, and their mass concentrations are respectively 120-250 g / L of ferric chloride, 60-120 g / L of sodium chloride, 20-60 g / L of buffer and 10-20 g / L of anode activator.

[0072] As an embodiment, the electroplating solution 23 in the metal lining layer 12 is connected to a concentration adjustment component of the metal salt of the first metal, so that the metal salt of the first metal is maintained in a certain range of concentration. Taking the material of the metal lining layer 12 selected from stainless steel as an example, the concentration range is 120-250 g / L. Further, the concentration adjustment component includes a liquid inlet component 31 and a liquid pumping component 32. The liquid inlet component 31 includes a first pump component 311. The first pump component 311 is connected to a metal salt solution of the first metal with a first concentration, so that the metal salt solution of the first metal with a first concentration is sucked into the metal lining layer 12; the liquid extraction component 32 includes a second pump component 321, and the second pump component 321 is connected to a container 322 so that the electroplating solution 23 in the metal lining layer 12 is sucked into the container 322; the first concentration is not lower than the concentration of the metal salt of the first metal in the electroplating solution 23 in the metal lining layer 12, wherein the first concentration can be 200-400g / L, and the metal salt solution of the first metal with the first concentration also includes sodium chloride (conductive salt), acid, buffer and anode active agent, and the concentration of these substances can be consistent with the concentration of the corresponding substances in the electroplating solution 23 in the metal lining layer 12. At the same time, the concentration adjustment component can adjust the amount of the electroplating solution 23 in the metal lining layer 12, so as to observe the position of the unreacted anode material, so as to facilitate the adjustment of the positive electrode of the battery component 24 and the position of the unreacted anode material.

[0073] Since the metal lining layer 12 is an annular curved surface structure, its anode materials cannot react completely at the same time during the electrolysis reaction. To ensure that all anode materials participate in the reaction, the slider 4 of the elimination device 2 can be adjusted so that the conductive wire is connected to different positions of the anode component 21 as the slider 4 moves, thereby ensuring that all anode materials can participate in the reaction.

[0074] After the electrolysis of the anode material in the metal lining layer 12 is completed, the closed circuit is disconnected, the electroplating liquid 23 in the metal lining layer 12 is sucked out through the concentration adjustment component, and the cathode component 22 is taken out, and then the inner cavity of the entire gas cylinder is dried. If other materials of the metal lining layer 12 are attached to the inner wall of the gas cylinder, they can be removed by post-processing, such as grinding.

[0075] The composite material wrapped gas cylinder obtained by the above elimination method greatly reduces the mass of the gas cylinder, and the first metal deposited on the cathode member 22 can be reused. The composite material wrapped gas cylinder 1 at least includes a metal lining layer 12 and a composite material layer 11 wrapped around the outer surface of the metal lining layer 12, the composite material layer 11 is a non-metallic layer, one end of the composite material wrapped gas cylinder is a sealed end, and the other end is an open end, the metal lining layer 12 includes a bottle mouth 121 arranged inside the open end and a bottle bottom 123 arranged inside the sealed end, the bottle mouth 121 is not connected to the bottle bottom 123, the non-contact surface of the bottle mouth 121 and the composite material layer is provided with a non-metallic layer, and the non-contact surface of the bottle bottom 123 and the composite material layer is also provided with a non-metallic layer. As an embodiment, the non-metallic layer is a graphene material layer, and the non-metallic layer includes a non-metallic connecting portion 124 and a non-metallic coating 125.

[0076] The above is only the embodiment of the present application, and the protection scope of the present application is not limited by these specific embodiments, but is determined by the claims of the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the technical ideas and principles of the present application should be included in the protection scope of the present application.

Claims

1. A device for removing the metal lining layer of a composite material wrapped around a gas cylinder, characterized in that: The composite material wrapped gas cylinder at least comprises a metal lining layer and a composite material layer wrapped around the outer surface of the metal lining layer, the composite material layer is a non-metal layer, one end of the composite material wrapped gas cylinder is a sealed end, and the other end is an open end, the metal lining layer comprises a bottle mouth, a bottle body and a bottle bottom in sequence, a non-metallic connecting portion is provided at the connection between the bottle mouth and the bottle body and at the connection between the bottle bottom and the bottle body, a non-metallic coating is provided on the side of the bottle mouth and the bottle bottom away from the composite material layer, and the bottle body of the metal lining layer comprises a main metal component, including: an anode member, wherein the main metal component is a first metal, and the first metal is used as an anode material of the anode member to undergo an oxidation reaction; A cathode member, wherein the cathode material of the cathode member is a second metal, the activity of the second metal is lower than that of the first metal, and the cathode member is used to deposit the first metal; An electroplating solution, wherein the electroplating solution is contained in the metal lining layer, and the cathode member is disposed in the electroplating solution and is not in contact with the anode member; A battery assembly, wherein the positive electrode of the battery assembly is electrically connected to the anode member, and the negative electrode of the battery assembly is electrically connected to the cathode member; The anode component, cathode component, electroplating solution and battery assembly form a closed loop; An interface layer is provided between the metal lining layer and the composite material layer, and the interface layer is a plasma deposition layer; The elimination device further comprises a slide, wherein the slide is provided with a groove, and the groove is engaged with the open end of the composite material wrapped around the gas cylinder, so that the slide moves circumferentially along the open end; The slide member is provided with a through hole, and the positive electrode of the battery assembly is connected to the anode member via a conductive wire passing through the through hole, so that the conductive wire is connected to different positions of the anode member as the slide member moves.

2. The elimination device according to claim 1, characterized in that: The material of the metal lining layer is selected from one of aluminum alloy and stainless steel; The main metal component of the aluminum alloy is aluminum. When the first metal is aluminum, the second metal is one of zinc, iron and copper; The main metal component of the stainless steel is iron. When the first metal is iron, the second metal is copper.

3. The elimination device according to claim 1, characterized in that: The electroplating solution includes a metal salt of the first metal.

4. The elimination device according to claim 3, characterized in that: The electroplating solution in the metal lining layer is connected to a concentration adjustment component of the metal salt of the first metal, so that the concentration of the metal salt of the first metal is maintained within a certain range; The concentration adjustment component includes a liquid inlet component and a liquid extraction component, wherein the liquid inlet component includes a first pump component, the first pump component is connected to a metal salt solution of a first metal with a first concentration, so that the metal salt solution of the first metal with the first concentration is sucked into the metal lining layer; the liquid extraction component includes a second pump component, the second pump component is connected to a container, so that the electroplating solution in the metal lining layer is sucked into the container; The first concentration is not lower than the concentration of the metal salt of the first metal in the electrolyte in the metal lining layer.

5. The elimination device according to claim 1, characterized in that: The non-metallic connecting portion and the non-metallic coating are both made of graphene material.

6. A method for removing the metal lining layer of a composite material wrapped around a gas cylinder, characterized in that: Using the elimination device described in any one of claims 1 to 5 comprises the following steps: S1. The main metal component of the metal lining layer is limited to a first metal, the first metal is used as an anode member, and the anode member undergoes an oxidation reaction; S2. Selecting a second metal having a lower activity than the first metal as a cathode member, the cathode member being used to deposit the first metal; S3. Pour the plating solution into the metal liner layer, and place the cathode member in S2 in the plating solution without contacting the anode member; S4. The positive electrode of the battery assembly is electrically connected to the anode component, and the negative electrode of the battery assembly is electrically connected to the cathode component, so that the anode component, the cathode component, the electroplating solution and the battery assembly form a closed loop.

7. The elimination method according to claim 6, characterized in that: The electroplating solution includes a metal salt of the first metal.

8. The elimination method according to claim 6, characterized in that: The material of the metal lining layer is selected from one of aluminum alloy and stainless steel; The main metal component of the aluminum alloy is aluminum. When the first metal is aluminum, the second metal is one of zinc, iron and copper; The main metal component of the stainless steel is iron. When the first metal is iron, the second metal is copper.

9. A composite material wrapped gas cylinder, characterized in that: Prepared by the elimination method described in any one of claims 6-8, the composite material wrapped gas cylinder at least comprises a metal lining layer and a composite material layer wrapped around the outer surface of the metal lining layer, the composite material layer is a non-metallic layer, one end of the composite material wrapped gas cylinder is a sealed end, and the other end is an open end, the metal lining layer comprises a bottle mouth portion arranged inside the open end and a bottle bottom portion arranged inside the sealed end, the bottle mouth portion is not connected to the bottle bottom portion, the non-contact surface between the bottle mouth portion and the composite material layer is provided with a non-metallic layer, and the non-contact surface between the bottle bottom portion and the composite material layer is also provided with a non-metallic layer; The non-metal layer is a graphene material layer.

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