Corrosion-resistant pressure vessel liner structure made of composite material

Abstract

This utility model provides a composite material corrosion-resistant pressure vessel inner liner structure, relating to the technical field of pressure vessel inner liners. It includes: a pressure vessel inner liner body; a hydrogenated nitrile rubber outer layer at the outer end of the inner liner body; a polytetrafluoroethylene (PTFE) reinforcing layer bonded to the inner end face of the hydrogenated nitrile rubber outer layer via supporting ribs; a buffer filler layer between the hydrogenated nitrile rubber outer layer and the PTFE reinforcing layer; a stainless steel inner layer tightly fixed to the inner end face of the PTFE reinforcing layer; and a low-alloy steel inner layer composite-welded to the inner side of the stainless steel inner layer. This utility model solves the problem of easy cracking of container inner liners with high-density thermoplastic plastic layers under external impact in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of pressure vessel liner technology, specifically to a composite material corrosion-resistant pressure vessel liner structure. Background Technology

[0002] A pressure vessel is a sealed device that bears a certain pressure or contains flammable and explosive media. It is mainly used in industrial production processes such as gas and liquid storage, reaction, and heat transfer. The inner liner of a pressure vessel is the container part used to store or process fluid substances. The inner liner is usually made of metal, plastic, or other materials suitable for bearing pressure and has sealing performance and pressure resistance. According to the prior art (announcement number: CN202323157301.9), there is an inner liner structure of a pressure vessel for loading gas. The document describes "providing a composite material blank, which is sequentially formed by stacking a first high-density thermoplastic plastic, a second high-density thermoplastic plastic, a first adhesive layer, a gas barrier layer, a second adhesive layer, and a third high-density thermoplastic plastic". However, the inner liner of the container with the high-density thermoplastic plastic layer in the prior art is prone to cracking when subjected to external force impact. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, a composite material corrosion-resistant pressure vessel inner liner structure is provided to solve the problem that the inner liner of a container with a high-density thermoplastic layer is prone to cracking when subjected to external force impact.

[0004] To achieve the above objectives, a composite material corrosion-resistant pressure vessel liner structure is provided, comprising: a pressure vessel liner body, wherein a hydrogenated nitrile rubber outer layer is disposed at the outer end of the pressure vessel liner body.

[0005] The inner end face of the hydrogenated nitrile rubber outer layer is bonded with a polytetrafluoroethylene (PTFE) reinforcing layer through supporting ribs. A buffer filler layer is provided between the hydrogenated nitrile rubber outer layer and the PTFE reinforcing layer. A stainless steel inner layer is tightly fixed to the inner end face of the PTFE reinforcing layer. A low-alloy steel inner layer is composite welded to the inner side of the stainless steel inner layer.

[0006] Furthermore, the inner liner of the pressure vessel comprises, from the inside out, a low-alloy steel inner layer, a stainless steel inner layer, a polytetrafluoroethylene reinforcing layer, a buffer filler layer, and a hydrogenated nitrile rubber outer layer.

[0007] Furthermore, the inner liner of the pressure vessel is bonded to the outer wall of the pressure vessel via a hydrogenated nitrile rubber outer layer.

[0008] Furthermore, the surface of the polytetrafluoroethylene reinforcing layer is provided with convex support ribs; and the support ribs are evenly distributed around the circumference.

[0009] Furthermore, a buffer cavity is formed between the polytetrafluoroethylene reinforcing layer and the hydrogenated nitrile rubber outer layer, and the buffer cavity is filled with a buffer filler layer.

[0010] Furthermore, the hydrogenated nitrile rubber outer layer and the stainless steel inner layer are sealed and wrapped around the outer ends of the polytetrafluoroethylene reinforcing layer and the buffer filler layer.

[0011] Furthermore, the thickness of the low-alloy steel inner layer is 0.5-1.5 mm.

[0012] The beneficial effects of this utility model are as follows: the composite material corrosion-resistant pressure vessel inner liner structure of this utility model utilizes a buffer packing layer and a polytetrafluoroethylene reinforcing layer to form a composite buffer and reinforcing structure layer. By using D3O material as the buffer packing layer, which has strain rate sensitivity, it can absorb external impact and harden to form a protective layer when impacted. This facilitates efficient buffering and protection against impact deformation and damage to the pressure vessel inner liner structure, and enhances the overall pressure bearing capacity of the composite material pressure vessel inner liner structure. The stainless steel inner layer and low alloy steel inner layer serve as a corrosion-resistant double-layer structure for the pressure vessel inner liner, effectively resisting the corrosive media contained in the pressure vessel and improving the service life of the composite material corrosion-resistant pressure vessel inner liner structure. Attached Figure Description

[0013] Figure 1 This is a top view of the composite material corrosion-resistant pressure vessel inner liner structure according to an embodiment of the present invention.

[0014] Figure 2 This is a top cross-sectional view of the composite material corrosion-resistant pressure vessel inner liner structure according to an embodiment of the present invention.

[0015] Figure 3 This is a partial cross-sectional view of the composite material corrosion-resistant pressure vessel inner liner structure according to an embodiment of the present invention.

[0016] Figure 4 This is a partial cross-sectional view of the connection structure of an embodiment of the present utility model.

[0017] In the diagram: 1. Pressure vessel inner liner body; 2. Hydrogenated nitrile rubber outer layer; 3. Stainless steel inner layer; 4. Low alloy steel inner layer; 5. Buffer packing layer; 6. Polytetrafluoroethylene reinforcing layer; 61. Support ribs; 62. Buffer cavity. Detailed Implementation

[0018] Reference Figures 1 to 4 As shown, this utility model provides a composite material corrosion-resistant pressure vessel inner liner structure, including: a pressure vessel inner liner body 1, and a hydrogenated nitrile rubber outer layer 2 disposed at the outer end of the pressure vessel inner liner body 1.

[0019] A polytetrafluoroethylene (PTFE) reinforcing layer 6 is bonded to the inner end face of the hydrogenated nitrile rubber outer layer 2 via a support rib 61. A buffer filler layer 5 is provided between the hydrogenated nitrile rubber outer layer 2 and the PTFE reinforcing layer 6. A stainless steel inner layer 3 is tightly fixed to the inner end face of the PTFE reinforcing layer 6. A low alloy steel inner layer 4 is composite welded to the inner side of the stainless steel inner layer 3.

[0020] The inner liner of the pressure vessel 1 is composed of a composite buffer and reinforcement structure layer consisting of a buffer packing layer 5 and a polytetrafluoroethylene (PTFE) reinforcing layer 6. The buffer packing layer 5, made of D3O material, has strain rate sensitivity and can absorb external impact. When impacted, it hardens to form a protective layer, which facilitates efficient buffering and protection against impact deformation and damage to the inner liner structure of the pressure vessel. This enhances the overall pressure bearing capacity of the composite material inner liner structure. The inner stainless steel layer 3 and the inner low alloy steel layer 4 form a corrosion-resistant double-layer structure for the inner liner of the pressure vessel, which effectively resists the corrosive media contained in the pressure vessel and improves the service life of the composite material corrosion-resistant inner liner structure.

[0021] In this embodiment, the inner liner body 1 of the pressure vessel comprises, from the inside out, a low-alloy steel inner layer 4, a stainless steel inner layer 3, a polytetrafluoroethylene reinforcing layer 6, a buffer filler layer 5, and a hydrogenated nitrile rubber outer layer 2. The inner liner body 1 of the pressure vessel is bonded to the outer wall of the pressure vessel via the hydrogenated nitrile rubber outer layer 2.

[0022] In a preferred embodiment, the low-alloy steel inner layer 4, the stainless steel inner layer 3, the polytetrafluoroethylene reinforcing layer 6, the buffer filler layer 5, and the hydrogenated nitrile rubber outer layer 2 constitute a multi-layer composite structure of the pressure vessel inner liner body 1. This facilitates the enhancement of the overall strength of the pressure vessel inner liner body 1 while improving corrosion resistance and impact resistance. The hydrogenated nitrile rubber outer layer 2 possesses excellent high-temperature resistance, chemical corrosion resistance, and aging resistance, and can stably bond the pressure vessel inner liner body 1 to the pressure vessel outer wall, thereby improving the pressure-bearing capacity and durability of the pressure vessel.

[0023] In this embodiment, the surface of the polytetrafluoroethylene reinforcing layer 6 is provided with convex support ribs 61; and the support ribs 61 are evenly distributed around the circumference. A buffer cavity 62 is formed between the polytetrafluoroethylene reinforcing layer 6 and the hydrogenated nitrile rubber outer layer 2, and the buffer cavity 62 is filled with a buffer filler layer 5.

[0024] In a preferred embodiment, the PTFE reinforcing layer 6, through the buffer cavities 62 formed by the support ribs 61, and the buffer filler layer 5 made of D3O material filled into the buffer cavities 62, possesses strain rate sensitivity. Under normal conditions, it is soft and elastic; upon severe impact or compression, the molecules rapidly lock together to form a solid protective layer, effectively absorbing and dispersing impact energy. This facilitates efficient buffering and protection against impact deformation and damage to the pressure vessel liner structure, enhancing the overall pressure-bearing capacity of the composite material pressure vessel liner structure, and is also relatively lightweight. The PTFE reinforcing layer 6 also possesses excellent pressure resistance, further enhancing the pressure-bearing capacity of the pressure vessel liner body 1 and preventing damage to the liner due to excessive pressure of the medium contained within the pressure vessel liner body 1.

[0025] In this embodiment, the hydrogenated nitrile rubber outer layer 2 and the stainless steel inner layer 3 are sealed and wrapped around the outer ends of the polytetrafluoroethylene reinforcing layer 6 and the buffer filler layer 5. The low alloy steel inner layer 4 has a thickness of 0.5-1.5 mm.

[0026] In a preferred embodiment, the hydrogenated nitrile rubber outer layer 2 and the stainless steel inner layer 3 encase the polytetrafluoroethylene reinforcing layer 6 and the buffer filler layer 5, facilitating the daily welding of the pressure vessel cylinder, top surface, and bottom. The ultra-thin low-alloy steel inner layer 4 provides corrosion resistance while reducing the cost of the pressure vessel liner.

[0027] The composite material corrosion-resistant pressure vessel inner liner structure of this utility model can effectively solve the problem of easy cracking of the inner liner of the container with high-density thermoplastic layer in the prior art when subjected to external force impact. It can effectively buffer and protect the inner liner structure of the pressure vessel from deformation and damage caused by impact, enhance the overall pressure bearing capacity of the composite material pressure vessel inner liner structure, effectively resist the corrosive media contained in the pressure vessel, and improve the service life of the composite material corrosion-resistant pressure vessel inner liner structure. It is applicable to composite material corrosion-resistant pressure vessel inner liner structures.

Claims

1. A composite material corrosion-resistant pressure vessel inner liner structure, comprising: The pressure vessel inner liner body (1) has a hydrogenated nitrile rubber outer layer (2) at its outer end, characterized in that: The inner end face of the hydrogenated nitrile rubber outer layer (2) is bonded with a polytetrafluoroethylene reinforcing layer (6) by a support rib (61). A buffer filler layer (5) is provided between the hydrogenated nitrile rubber outer layer (2) and the polytetrafluoroethylene reinforcing layer (6). A stainless steel inner layer (3) is tightly fixed to the inner end face of the polytetrafluoroethylene reinforcing layer (6). A low alloy steel inner layer (4) is composite welded to the inner side of the stainless steel inner layer (3).

2. The corrosion-resistant inner container structure of a composite material pressure vessel according to claim 1, characterized in that, The inner body (1) of the pressure vessel contains, from the inside out, a low alloy steel inner layer (4), a stainless steel inner layer (3), a polytetrafluoroethylene reinforcing layer (6), a buffer filler layer (5), and a hydrogenated nitrile rubber outer layer (2).

3. The corrosion-resistant inner container structure of a composite material pressure vessel according to claim 1, characterized in that, The inner liner body (1) of the pressure vessel is bonded to the outer wall of the pressure vessel through a hydrogenated nitrile rubber outer layer (2).

4. The corrosion-resistant inner container structure of a composite material pressure vessel according to claim 1, characterized in that, The surface of the polytetrafluoroethylene reinforcing layer (6) is provided with outwardly protruding support ribs (61); and the support ribs (61) are evenly distributed around the circumference.

5. The corrosion-resistant inner container structure of a composite material pressure vessel according to claim 4, characterized in that, A buffer cavity (62) is formed between the polytetrafluoroethylene reinforcing layer (6) and the hydrogenated nitrile rubber outer layer (2), and the buffer cavity (62) is filled with a buffer filler layer (5).

6. The corrosion-resistant inner container structure of a composite material pressure vessel according to claim 1, characterized in that, The hydrogenated nitrile rubber outer layer (2) and stainless steel inner layer (3) are sealed and wrapped around the outer ends of the polytetrafluoroethylene reinforcing layer (6) and the buffer filler layer (5).

7. The corrosion-resistant inner container structure of a composite material pressure vessel according to claim 1, characterized in that, The thickness of the low alloy steel inner layer (4) is 0.5-1.5 mm.

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