Composite material pressure vessel

Abstract

The utility model relates to the technical field of pressure containers, in particular to a composite material pressure container, a composite layer is wound on the outer wall of an inner container, connecting pipes are fixedly connected to the two ends of the inner container, and mounting flanges are fixedly connected to the end faces of the connecting pipes. By arranging the composite layer and the reinforcing layer, the container not only has the characteristics of good machinability, air tightness, corrosion resistance, high strength, high toughness and the like of the metal lining, but also integrates the advantages of light weight, good safety, high specific strength, good designability and the like of a composite material; the composite pressure vessel has the advantages of high loading capacity, long fatigue life, light weight, corrosion resistance and the like, the weight of the composite pressure vessel is reduced by 1 / 3-2 / 3 compared with that of a steel pressure vessel under the condition of the same volume and pressure, dangerous fragments cannot be generated when the composite material is damaged by impact or high-speed impact, and the service life of the composite pressure vessel is prolonged. Compared with a traditional metal pressure vessel, the pressure vessel has better use safety.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure vessels, and more specifically to a composite material pressure vessel. Background Art

[0002] Pressure vessels, as equipment that can store or transmit gas or liquid and maintain a pressure higher than atmospheric pressure inside, have many types due to differences in design characteristics, use conditions and pressure levels. This equipment is widely used in many industries such as chemical, petroleum, pharmaceutical, food processing, energy, etc. Traditional pressure vessels are mainly made of metal and assembled by welding high-pressure resistant and thick plates. However, the all-metal structure is not only heavy, but also has the problems of heavy weight, large processing equipment and high cost. In contrast, some wrapped pressure vessels only use fibers for circumferential winding on the barrel section of the metal liner. Although this design is innovative, due to the inconsistent bearing capacity of the barrel section and the head, it will eventually lead to the problem of insufficient overall bearing capacity. Secondly, the pressure vessel is usually connected to the pipeline through a flange, and the flanges are sealed by a sealing ring. After a period of use, the sealing ring will age, resulting in leakage between the flanges. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the utility model provides a composite material pressure vessel to solve the problems existing in the above-mentioned background technology.

[0004] The utility model provides the following technical solution: a composite material pressure vessel, comprising an inner liner, characterized in that: the outer wall of the inner liner is wrapped with a composite layer, both ends of the inner liner are fixedly connected with connecting pipes, and the end surface of the connecting pipe is fixedly connected with a mounting flange;

[0005] A through hole connected to the interior of the connecting pipe is provided at the inner center of the mounting flange, an airbag is fixedly installed inside the mounting flange, a silicone sealing plate is fixedly connected to the surface of the airbag, a sealing cavity is provided inside the mounting flange, a sliding plate is sealingly and slidably connected to the interior of the sealing cavity, a sliding cylinder is fixedly connected to the surface of the sliding plate, a connecting pipe is fixedly connected to the interior of the mounting flange, and a spring is movably installed inside the sealing cavity.

[0006] Furthermore, the composite layer is any one of glass fiber, S high-strength fiber, carbon fiber and basalt fiber, the composite layer is fixedly connected to the outer surface of the liner by epoxy resin impregnation, and a reinforcement layer is wrapped around the outside of the composite layer.

[0007] Furthermore, the interior of the sealing cavity is connected to the interior of the airbag through a connecting pipe, the surface of the airbag extends to the outer surface of the mounting flange, and the airbag and the silicone sealing plate are both annular.

[0008] Furthermore, the spring pushes the sliding plate to move, so that the interior of the airbag is in a normal pressure state in the initial state.

[0009] Furthermore, a sealing ring is fixedly mounted on the side of the sliding plate.

[0010] Technical effects and advantages of the utility model:

[0011] 1. The utility model provides a composite layer and a reinforcement layer, so that the container not only takes into account the good processability, air tightness, corrosion resistance, high strength and high toughness of the metal liner, but also combines the advantages of the composite material such as light weight, good safety, high specific strength and good designability, so that it has excellent properties such as high pressure bearing capacity, high fatigue life, light weight and corrosion resistance. Under the same volume and pressure conditions, the weight of the composite pressure vessel is 1 / 3-2 / 3 lighter than that of the steel pressure vessel. At the same time, when the composite material is damaged by impact or high-speed impact, no dangerous fragments will be generated, thereby reducing or avoiding harm to personnel. The composite pressure vessel has better safety in use than the metal pressure vessel.

[0012] 2. The utility model sets a silicone sealing plate. When the cooler is fixed on the positioning flange through the mounting flange, the mounting flange fits with the positioning flange, and the sliding plate can be driven to slide inside the sealing cavity through the sliding cylinder, and the airbag can be pressurized, thereby enhancing the sealing between the positioning flange and the mounting flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a longitudinal sectional view of the utility model;

[0015] Figure 3 It is a three-dimensional structural schematic diagram of the mounting flange in the utility model;

[0016] Figure 4 It is a longitudinal sectional view of the mounting flange in the utility model.

[0017] The figures are marked as follows: 1. liner; 2. composite layer; 3. reinforcement layer; 101. connecting pipe; 102. mounting flange; 103. through hole; 104. airbag; 105. silicone sealing plate; 106. sealing chamber; 107. sliding plate; 108. sliding cylinder; 109. connecting pipe; 110. spring. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with specific embodiments. However, people familiar with the art should understand that the detailed description given here in conjunction with the drawings is for better explanation, and the structure of the present invention necessarily exceeds these limited embodiments. For some equivalent replacement schemes or common means, they are no longer described in detail herein, but still fall within the scope of protection of the present application.

[0019] Figure 1-Figure 4 It is the best embodiment of the utility model, and the following Figure 1-Figure 4 The utility model is further described.

[0020] See attached Figure 1-Figure 4 Specifically, a composite pressure vessel includes an inner liner 1, an outer wall of the inner liner 1 is wrapped with a composite layer 2, both ends of the inner liner 1 are fixedly connected with connecting pipes 101, and the end face of the connecting pipe 101 is fixedly connected with a mounting flange 102, wherein the inner liner 1 is Q345 steel, with an elastic modulus of 210 GPa, a Poisson's ratio of 0.3, a yield strength of 345 MPa, a thickness of ≥16 mm, and a tensile strength of 1300 MPa and a modulus of 70 GPa for the composite layer 2.

[0021] The yarn width of the composite layer 2 is 100 mm, and the longitudinal winding angle of the composite layer 2 on the inner liner 1 is 12°. A reinforcing layer 3 is wound around the outside of the composite layer 2. The inner layer of the reinforcing layer 3 is any one of carbon fiber felt or glass fiber. The middle layer of the reinforcing layer 3 is a mixture of any one or more of glass fiber, S high-strength fiber, carbon fiber and basalt fiber. The outer layer of the reinforcing layer 3 is a polyurethane protective coating.

[0022] In this embodiment, by providing a composite layer 2 and a reinforcement layer 3, the container not only takes into account the good processability, air tightness, corrosion resistance, high strength and high toughness of the metal lining, but also combines the advantages of composite materials such as light weight, good safety, high specific strength and good designability, so that it has excellent properties such as high pressure bearing capacity, high fatigue life, light weight and corrosion resistance. Under the same volume and pressure conditions, the weight of the composite pressure vessel is 1 / 3-2 / 3 lighter than that of a steel pressure vessel. At the same time, when the composite material is damaged by impact or high-speed impact, no dangerous fragments will be produced, thereby reducing or avoiding harm to personnel. The composite pressure vessel has better safety in use than metal pressure vessels.

[0023] Specifically, the composite layer 2 is fixedly connected to the outer surface of the inner liner 1 by epoxy resin impregnation, and the composite layer 2 is any one of glass fiber, S high-strength fiber, carbon fiber and basalt fiber.

[0024] In this embodiment, by impregnating the composite layer 2 with epoxy resin, the composite layer 2 can be firmly adhered to the outer surface of the inner liner 1 through the viscosity of the epoxy resin impregnation.

[0025] Specifically, a through hole 103 connected to the interior of the connecting pipe 101 is opened at the inner center of the mounting flange 102, an airbag 104 is fixedly installed inside the mounting flange 102, a silicone sealing plate 105 is fixedly connected to the surface of the airbag 104, a sealing cavity 106 is opened inside the mounting flange 102, the interior of the sealing cavity 106 is sealingly and slidingly connected to a sliding plate 107, the surface of the sliding plate 107 is fixedly connected to a sliding cylinder 108, a connecting pipe 109 is fixedly connected to the interior of the mounting flange 102, and a spring 110 is movably installed inside the sealing cavity 106.

[0026] In this embodiment, a silicone sealing plate 105 is provided. When the pressure vessel is fixedly mounted on the positioning flange through the mounting flange 102, the mounting flange 102 and the positioning flange are fitted together. The sliding plate 107 can be driven to slide inside the sealing cavity 106 through the sliding cylinder 108, and the airbag 104 can be pressurized, thereby strengthening the sealing between the positioning flange and the mounting flange 102.

[0027] Specifically, the interior of the sealing cavity 106 is connected to the interior of the airbag 104 through the connecting pipe 109 , the surface of the airbag 104 extends to the outer surface of the mounting flange 102 , and both the airbag 104 and the silicone sealing plate 105 are annular.

[0028] In this embodiment, by providing the connecting pipe 109 , it is possible to ensure that the pressure inside the sealed cavity 106 is equal to that inside the airbag 104 .

[0029] Specifically, the spring 110 pushes the sliding plate 107 to move, so that the interior of the airbag 104 is in a normal pressure state in the initial state.

[0030] In this embodiment, by providing a spring 110, the airbag 104 and the silicone sealing plate 105 can be retracted to a position close to the mounting flange 102 when not installed. Therefore, when the mounting flange 102 and the positioning flange just come into contact, the silicone sealing plate 105 will not directly contact the positioning flange, thereby reducing the wear on the surface of the silicone sealing plate 105 and extending the service life of the silicone sealing plate 105.

[0031] Specifically, a sealing ring is fixedly installed on the side of the sliding plate 107, and the connecting pipe 109 is "L"-shaped.

[0032] In this embodiment, by providing a sealing ring, the sealing performance inside the sealing cavity 106 can be ensured.

[0033] The working principle and use process of the utility model are as follows: when installing, the container is placed in the specified position as a whole, and then the mounting flange 102 is fitted with the positioning flange, and the tension bolts are installed through the mounting bolts. By tightening the nuts on the tension bolts, the surface of the positioning flange is fitted with the surface of the mounting flange 102. At the same time, the sliding plate 107 can be driven to slide inside the sealing chamber 106 through the sliding cylinder 108, and the inside of the sealing chamber 106 is pressurized. At this time, the strong pressure inside the sealing chamber 106 enters the airbag 104 through the connecting pipe 109, causing the airbag 104 to expand, and the surface of the silicone sealing plate 105 is pressed against the surface of the positioning flange, which can enhance the sealing between the positioning flange and the mounting flange 102. When in use, due to the arrangement of the composite layer 2 and the reinforcement layer 3, the container not only takes into account the good processability, air tightness, corrosion resistance, high strength and high toughness of the metal liner, but also combines the advantages of the composite material such as light weight, good safety, high specific strength and good designability, so that it has excellent properties such as high pressure bearing capacity, high fatigue life, light weight and corrosion resistance. Under the same volume and pressure conditions, the weight of the composite pressure vessel is 1 / 3-2 / 3 lighter than that of the steel pressure vessel. At the same time, when the composite material is damaged by impact or high-speed impact, no dangerous fragments will be generated, thereby reducing or avoiding harm to personnel. The composite pressure vessel has better safety in use than the metal pressure vessel.

[0034] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A composite pressure vessel, comprising an inner liner (1), characterized in that: The outer wall of the inner liner (1) is wrapped with a composite layer (2), both ends of the inner liner (1) are fixedly connected to connecting pipes (101), and the end surface of the connecting pipe (101) is fixedly connected to a mounting flange (102); A through hole (103) communicating with the interior of the connecting pipe (101) is provided at the center of the interior of the mounting flange (102); an airbag (104) is fixedly installed inside the mounting flange (102); a silicone sealing plate (105) is fixedly connected to the surface of the airbag (104); a sealing cavity (106) is provided inside the mounting flange (102); a sliding plate (107) is sealingly and slidably connected to the interior of the sealing cavity (106); a sliding cylinder (108) is fixedly connected to the surface of the sliding plate (107); a connecting pipe (109) is fixedly connected to the interior of the mounting flange (102); and a spring (110) is movably installed inside the sealing cavity (106).

2. A composite pressure vessel according to claim 1, characterized in that: The composite layer (2) is any one of glass fiber, S high-strength fiber, carbon fiber and basalt fiber; the composite layer (2) is fixedly connected to the outer surface of the liner (1) by epoxy resin impregnation; and a reinforcement layer (3) is wound around the outside of the composite layer (2).

3. A composite pressure vessel according to claim 1, characterized in that: The interior of the sealing cavity (106) is connected to the interior of the airbag (104) via a connecting pipe (109); the surface of the airbag (104) extends to the outer surface of the mounting flange (102); and the airbag (104) and the silicone sealing plate (105) are both annular.

4. A composite pressure vessel according to claim 1, characterized in that: The spring (110) pushes the sliding plate (107) to move, so that the interior of the airbag (104) is in a normal pressure state in the initial state.

5. A composite pressure vessel according to claim 1, characterized in that: A sealing ring is fixedly mounted on the side of the sliding plate (107).

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