Winding equipment and forming process for large-volume high-pressure composite pressure vessels

Abstract

The present invention relates to the technical field of winding forming equipment, specifically to winding forming equipment for large-volume high-pressure resistant composite pressure vessels, including: a yarn box, a dipping component, a damping component, a yarn collection component, a tension detection component, a winding component, a mold and a main shaft; it also includes: a winding vehicle, which is arranged on one side of the mold, and the winding vehicle can move along the axial direction of the mold; a telescopic component, which is telescopically arranged on the winding vehicle, and the telescopic component can move along the radial direction of the mold; a winding head, which is arranged at the telescopic end of the telescopic component, and the winding head can swing arbitrarily toward the mold. At the same time, a winding forming process for a large-volume high-pressure resistant composite pressure vessel is also disclosed. By winding the resin-impregnated fibers around the outer wall of the mold to form an integral structure of the cylinder and other accessories, the high-pressure container not only improves the load-bearing capacity and reduces the weight, but also improves the corrosion resistance and fatigue resistance of the high-pressure container.

Description

Technical Field

[0001] The invention relates to the technical field of winding forming equipment, in particular to winding forming equipment and a forming process for a large-volume high-pressure resistant composite pressure vessel. Background Art

[0002] Large containers can be divided into four categories based on their structural form: the first category is all-metal containers; the second category is fully wound composite vertical storage tanks, which are the main form of large containers; the third category is metal-lined hoop-wound composite reinforced composite pressure vessels; the fourth category is plastic-lined fully wound composite reinforced composite pressure vessels.

[0003] Composite winding molding storage tanks are a common form of the above-mentioned large pressure vessels. In the related technology, the molding process of the storage tank is a two-dimensional fixed-length winding cylinder, in which the head, flange and other accessories are molded separately. The fiber tension is not controlled during the winding process of the cylinder, and the performance of the fiber cannot be fully exerted. Then the cylinder is connected with the head, flange, etc. to form a storage tank. This molding process is mainly easy to form a cylindrical shape. The tension of each layer cannot be controlled as required, the process error is large, it is not pressure-resistant, and the overall sealing has the defect of dripping. When the shape of the storage tank is complex, it needs to be molded and assembled multiple times. The existing technology makes it too energy-consuming, which not only increases the manufacturing cost of the high-pressure container, but also wastes natural resources too much. Summary of the invention

[0004] In order to solve the technical problems existing in the background technology, the present invention provides a winding molding equipment and a molding process for a large-volume high-pressure resistant composite pressure vessel, which forms an integral structure with a cylinder and other accessories by winding fibers impregnated with resin around the outer wall of a mold, so that the high-pressure container not only improves the carrying capacity and reduces the weight, but also improves the corrosion resistance and fatigue resistance of the high-pressure container.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] Winding equipment for large-volume high-pressure composite pressure vessels, including:

[0007] Yarn box, dipping assembly, damping assembly, yarn collection assembly, tension detection assembly, winding assembly, mold and main shaft;

[0008] Also includes:

[0009] The winding car is arranged on one side of the mold and can move along the axial direction of the mold;

[0010] A telescopic component is telescopically arranged on the winding vehicle, and the telescopic component can move along the radial direction of the mold;

[0011] The winding head is arranged at the telescopic end of the telescopic component, and the winding head can be swung arbitrarily toward the mold direction.

[0012] Further, the winding head comprises:

[0013] A base, fixedly arranged at the telescopic end of the telescopic assembly;

[0014] An outer rotating member is rotatably arranged on the base, and the outer rotating member is provided with an outer inclined arm;

[0015] A middle-layer rotating member is rotatably arranged on the outer-layer rotating member, and the middle-layer rotating member is provided with a middle-layer oblique arm;

[0016] The inner rotating member is rotatably arranged on the middle rotating member, and the inner rotating member is provided with an inner inclined arm;

[0017] The outer layer curved arm has one end rotatably connected to the outer layer inclined arm and the other end rotatably connected to the swing plate;

[0018] The middle layer curved arm has one end rotatably connected to the middle layer oblique arm and the other end rotatably connected to the swing plate;

[0019] One end of the inner layer curved arm is rotatably connected to the inner layer inclined arm, and the other end is rotatably connected to the swing plate.

[0020] Furthermore, an inner cylinder is arranged on the base, and the inner cylinder penetrates the inner rotating member.

[0021] Furthermore, the winding head also includes:

[0022] The inner driving member is arranged on the base, and the inner driving member and the inner rotating member are driven by a worm gear;

[0023] The outer driving member is arranged on the base, and the outer driving member and the outer rotating member are driven by a worm gear;

[0024] The middle-layer driving member is arranged on the base, and the middle-layer driving member and the middle-layer rotating member are driven by a worm gear.

[0025] Furthermore, a terminal assembly is arranged on the swing disk, and the terminal assembly is always oriented toward the winding direction of the fiber.

[0026] Furthermore, a deviation detection component is provided on the end component, and the deviation detection component includes:

[0027] An outer frame, fixedly arranged on the end assembly;

[0028] An inner frame, arranged inside the outer frame;

[0029] A connecting beam connects the outer frame and the inner frame;

[0030] Strain gauge, mounted on the connecting beam;

[0031] The guide hole is opened on the inner frame.

[0032] Furthermore, a winding roller is provided on the terminal assembly, and the winding roller comprises:

[0033] A rotating shaft is rotatably disposed on the end assembly;

[0034] A cylinder wall is arranged on the outer periphery of the rotating shaft;

[0035] A sliding sleeve, slidably mounted on the rotating shaft;

[0036] A connecting rod, one end of which is rotatably connected to the cylinder wall, and the other end of which is rotatably connected to the sliding sleeve;

[0037] The retaining ring is arranged between the sliding sleeve and the end component, and a pressure sensor is arranged on the retaining ring.

[0038] Furthermore, the rotating shaft is provided with an annular groove, and the cylinder wall is provided with an inserting plate, and the inserting plate can be slidably inserted in the annular groove.

[0039] Further, the pressure sensor is arranged between the retaining ring and the end assembly, the sliding sleeve is rotatably connected to the retaining ring through a first bearing, and the first bearing is a thrust bearing;

[0040] The rotating shaft is rotatably connected to the terminal assembly through a second bearing, and the second bearing is a deep groove ball bearing.

[0041] The winding process of a large-volume high-pressure resistant composite pressure vessel includes the following steps:

[0042] a. Lock and fix the spindle and the mold, and the mold as the basic liner is sandblasted and rust-removed on the surface for protection;

[0043] b. The fibers are dried and dehydrated and then installed on the yarn box, and finally introduced into the winding assembly through the dipping assembly, the damping assembly, the yarn collection assembly and the tension detection assembly;

[0044] c. Mix the epoxy resin according to the proportion and pour it into the dipping tank of the dipping component. The temperature of the dipping tank is set at 15℃-25℃;

[0045] d. Calculate relevant winding parameters according to the process plan, conduct computer simulation operation, and verify the consistency between the calculated parameters and the actual winding;

[0046] e. Based on the mold, the fibers soaked in the resin solution are wound and formed to form the inner lining layer and the structural layer of the high-pressure container respectively;

[0047] f. After winding is completed, the epoxy resin undergoes a curing reaction under heating conditions to form a three-dimensional network structure, forming an insoluble and infusible solid;

[0048] i. The surface of the high-pressure container formed by winding is polished to remove the glue nodules, and then a layer of weather-resistant gel coat is sprayed on the entire surface.

[0049] Beneficial effects of the present invention:

[0050] (1) By winding the fiber bundle impregnated with resin around the outer wall of the mold, the high-pressure container not only improves its load-bearing capacity and reduces its weight, but also improves its corrosion resistance and fatigue resistance, making it widely used in aerospace, shipbuilding, automobiles, energy storage and other fields.

[0051] (2) The winding head can rotate in multiple dimensions to wind products of various shapes. The winding head can always face the winding direction of the fiber, giving full play to the strength of the fiber in the direction of the principal stress, making the winding effect better and further improving the pressure resistance of the high-pressure container.

[0052] (3) The winding roller at the end can guide and detect tension at the same time, and can monitor the fiber winding tension more accurately, so as to effectively compensate for the tension fluctuations caused by factors such as changes in yarn ball diameter and yarn delivery speed in a timely manner, so that the fiber winding tension remains stable and the fiber winding reinforced composite material layer has sufficient stability.

[0053] (4) The offset detection component at the end can detect the offset of the fiber. When the fiber is offset relative to the winding head, that is, when the actual winding direction of the fiber does not match the simulated preset direction, it can be detected and prompted in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0055] Figure 1 It is the process principle diagram of the present invention;

[0056] Figure 2 It is a schematic diagram of the structure of the winding assembly;

[0057] Figure 3 This is the structure diagram of the winding head Figure 1 ;

[0058] Figure 4 This is the structure diagram of the winding head Figure 2 ;

[0059] Figure 5 is a partial cross-sectional view of the winding head;

[0060] Figure 6 This is a schematic diagram of the structure of the terminal component. Figure 1 ;

[0061] Figure 7 This is a schematic diagram of the structure of the terminal component. Figure 2 ;

[0062] Figure 8 yes Figure 6 A partial enlarged view of the position A in the middle;

[0063] Fig. 9 It is an exploded view of the winding roller;

[0064] Fig.10 is a cross-sectional view of the winding roller.

[0065] In the picture:

[0066] 1. Yarn box, 2. Dipping assembly, 3. Damping assembly, 4. Yarn collecting assembly, 5. Tension detection assembly, 6. Winding assembly, 7. Mold, 8. Spindle, 9. Winding car, 10. Telescopic assembly, 11. Winding head

[0067] 1101. base, 1102. inner layer rotating member, 1103. middle layer rotating member, 1104. outer layer rotating member, 1105. outer layer oblique arm, 1106. outer layer curved arm, 1107. middle layer oblique arm, 1108. middle layer curved arm, 1109. inner layer oblique arm, 1110. inner layer curved arm, 1111. swing plate, 1112. end assembly, 1113. inner layer driving member, 1114. outer layer driving member, 1115. middle layer driving member, 1116. inner cylinder, 1117. deviation detection assembly, 1118. winding roller

[0068] 11171. Outer frame, 11172. Connecting beam, 11173. Strain gauge, 11174. Inner frame, 11175. Guide hole

[0069] 11181. rotating shaft, 11182. cylinder wall, 11183. connecting rod, 11184. sliding sleeve, 11185. first bearing, 11186. retaining ring, 11187. second bearing, 11188. pressure sensor, 11189. ring groove, 11190. plug plate. DETAILED DESCRIPTION

[0070] The present invention is further described in detail below with reference to the accompanying drawings.

[0071] like Figure 1 As shown, the winding and forming equipment of the large-volume high-pressure resistant composite pressure vessel comprises: a yarn box 1, a dipping assembly 2, a damping assembly 3, a yarn collecting assembly 4, a tension detection assembly 5, a winding assembly 6, a mold 7 and a main shaft 8. The fiber coming out of the yarn box 1 passes through the dipping assembly 2, the damping assembly 3, the yarn collecting assembly 4 and the tension detection assembly 5 in sequence, and finally is wound around the mold 7 on the main shaft 8 through the winding assembly 6.

[0072] like Figure 2As shown, the winding forming equipment for a large-volume high-pressure resistant composite pressure vessel further includes a winding vehicle 9, which is arranged on one side of the mold 7 and can move along the axial direction of the mold 7. A telescopic component 10 is telescopically arranged on the winding vehicle 9 and can move along the radial direction of the mold 7. A winding head 11 is arranged at the telescopic end of the telescopic component 10 and can swing arbitrarily toward the mold 7.

[0073] like Figure 3 , 4 As shown in Figures 5 and 6, the specific structure of the winding head 11 includes a base 1101, which is fixedly arranged at the telescopic end of the telescopic assembly 10. An outer rotating member 1104 is rotatably arranged on the base 1101, and the outer rotating member 1104 is provided with an outer oblique arm 1105. A middle rotating member 1103 is rotatably arranged on the outer rotating member 1104, and the middle rotating member 1103 is provided with a middle oblique arm 1107. An inner rotating member 1102 is rotatably arranged on the middle rotating member 1103, and the inner rotating member 1102 is provided with an inner oblique arm 1109. The outer rotating member 1104, the middle rotating member 1103 and the inner rotating member 1102 are concentrically nested. The rotation centers of the outer rotating member 1104, the middle rotating member 1103 and the inner rotating member 1102 are coaxial.

[0074] One end of the outer layer curved arm 1106 is rotatably connected to the outer layer oblique arm 1105, and the other end of the outer layer curved arm 1106 is rotatably connected to the swing plate 1111. One end of the middle layer curved arm 1108 is rotatably connected to the middle layer oblique arm 1107, and the other end of the middle layer curved arm 1108 is rotatably connected to the swing plate 1111. One end of the inner layer curved arm 1110 is rotatably connected to the inner layer oblique arm 1109, and the other end of the inner layer curved arm 1110 is rotatably connected to the swing plate 1111. The outer layer curved arm 1106, the middle layer curved arm 1108 and the inner layer curved arm 1110 are all L-shaped structures. The three rotation connection points of the swing plate 1111 are evenly distributed on the circumference, that is, the interval between the rotation connection points is 120°.

[0075] An inner cylinder 1116 is disposed on the base 1101 and is fixed relative to the base 1101. The inner cylinder 1116 penetrates the inner rotating member 1102. The inner cylinder 1116 serves as a passage for conveying fibers, and the fibers pass through the inner cylinder 1116 and are connected to the terminal assembly 1112 from the front end of the inner cylinder 1116.

[0076] The specific structure of the winding head 11 also includes an inner layer driving member 1113, which is arranged on the base 1101. The inner layer driving member 1113 and the inner layer rotating member 1102 are driven by a worm gear. The outer layer driving member 1114 is arranged on the base 1101, and the outer layer driving member 1114 and the outer layer rotating member 1104 are driven by a worm gear. The middle layer driving member 1115 is arranged on the base 1101, and the middle layer driving member 1115 and the middle layer rotating member 1103 are driven by a worm gear. The worm gear transmission has the advantages of high bearing capacity, high reduction ratio and self-locking, which can make the inner layer rotating member 1102, the outer layer rotating member 1104 and the middle layer rotating member 1103 rotate more accurately and stably. And the inner layer driving member 1113, the outer layer driving member 1114 and the middle layer driving member 1115 all use servo motors to achieve more precise control. Even if the servomotor loses power, the worm gear transmission can keep the winding head 11 stable.

[0077] The swing plate 1111 is provided with an end assembly 1112 , and the end assembly 1112 can always face the winding direction of the fiber.

[0078] like Figure 6 , 8 As shown, the end component 1112 is provided with an offset detection component 1117, and the offset detection component 1117 is located at the center of the end component 1112. The specific structure of the offset detection component 1117 includes an outer frame 11171, and the outer frame 11171 is fixedly provided on the end component 1112. The inner frame 11174 is provided inside the outer frame 11171, and the inner frame 11174 is concentric with the outer frame 11171. The connecting beam 11172 connects the outer frame 11171 and the inner frame 11174, and the connecting beam 11172 is arc-shaped, and a plurality of connecting beams 11172 are evenly distributed around the circumference. The strain gauge 11173 is mounted on the connecting beam 11172. The guide hole 11175 is provided on the inner frame 11174. The fiber passes through the guide hole 11175. When the fiber is offset relative to the winding head 11, that is, the actual winding direction of the fiber is inconsistent with the simulated preset direction, the fiber will touch the side wall of the guide hole 11175, thereby causing the inner frame 11174 to be offset. The inner frame 11174 will cause the connecting beam 11172 to bend and deform, and the strain gauge 11173 can detect the bending deformation of the connecting beam 11172. The signal of the strain gauge 11173 can be used to determine whether the fiber is offset relative to the winding head 11, thereby having an offset warning function.

[0079] like Figure 7 As shown, a winding roller 1118 is provided on the end assembly 1112, and the fiber is wound on the winding roller 1118. The winding roller 1118 can guide the fiber, and the fiber passing through the front end of the inner cylinder 1116 passes through the winding roller 1118 and just passes through the center of the guide hole 11175.

[0080] like Fig. 9 , 10 As shown, the winding roller 1118 can also perform tension detection. The specific structure of the winding roller 1118 includes a rotating shaft 11181, and the rotating shaft 11181 is rotatably arranged on the end assembly 1112. A plurality of cylinder walls 11182 are evenly distributed on the outer periphery of the rotating shaft 11181, and a movable gap is left between adjacent cylinder walls 11182. The sliding sleeve 11184 is slidably sleeved on the rotating shaft 11181, and the sliding sleeve 11184 can slide axially relative to the rotating shaft 11181. One end of the connecting rod 11183 is rotatably connected to the cylinder wall 11182, and the other end of the connecting rod 11183 is rotatably connected to the sliding sleeve 11184. Two connecting rods 11183 are arranged on one sliding sleeve 11184, and the connection point between the connecting rod 11183 and the sliding sleeve 11184 is close to the center of the sliding sleeve 11184. The two connecting rods 11183 are arranged in an eight-shaped shape. Due to the existence of fiber tension, the fiber exerts pressure on the cylinder wall 11182, and the pressure exerted on the cylinder wall 11182 is converted into pressure exerted on the end assembly 1112 by the sleeve 11184 through the connecting rod 11183. And because the inclination angle of the connecting rod 11183 is close to horizontal, a force amplification effect can be produced, so that the pressure exerted on the end assembly 1112 by the sleeve 11184 is significantly greater than the pressure exerted on the cylinder wall 11182.

[0081] The retaining ring 11186 is arranged between the sliding sleeve 11184 and the terminal assembly 1112, and a pressure sensor 11188 is arranged on the retaining ring 11186. The pressure sensor 11188 on the retaining ring 11186 can detect the pressure of the sliding sleeve 11184 on the terminal assembly 1112, thereby indirectly detecting the pressure of the fiber on the cylinder wall 11182, thereby detecting the tension of the fiber. And due to the force amplification effect of the connecting rod 11183, the slight pressure on the cylinder wall 11182 can be amplified by the connecting rod 11183, so that the pressure sensor 11188 can detect it. And the winding roller 1118 is located at the very end of the fiber, and the fiber tension detected by it directly reflects the tension of the fiber winding on the mold 7. Therefore, the tension detection of the winding roller 1118 is more accurate, so that the tension fluctuation caused by factors such as the yarn ball diameter and the yarn output speed change can be effectively compensated in time through the damping component 3, etc., so that the winding tension of the fiber remains stable, and the fiber winding reinforced composite material layer has sufficient stability.

[0082] In order to make the cylinder wall 11182 move only along the radial direction of the rotating shaft 11181 , the rotating shaft 11181 is provided with an annular groove 11189 , and the cylinder wall 11182 is provided with an inserting plate 11190 , which is slidably inserted in the annular groove 11189 .

[0083] In order to prevent stress wear between components, the pressure sensor 11188 is arranged between the retaining ring 11186 and the end assembly 1112, and the sleeve 11184 is rotatably connected to the retaining ring 11186 through the first bearing 11185, and the first bearing 11185 is a thrust bearing. The rotating shaft 11181 is rotatably connected to the end assembly 1112 through the second bearing 11187, and the second bearing 11187 is a deep groove ball bearing.

[0084] The winding process of a large-volume high-pressure resistant composite pressure vessel includes the following steps:

[0085] a. The spindle 8 and the mold 7 are locked and fixed. The mold 7 is used as the basic inner tank and is protected by surface sandblasting and rust removal.

[0086] b. The used fibers are dried and dehydrated and then installed on the yarn box 1, passed through the dipping component 2, the damping component 3, the yarn collecting component 4 and the tension detection component 5, and finally introduced into the winding component 6.

[0087] c. Mix the epoxy resin according to the proportion and pour it into the dipping tank of the dipping component 2. The temperature of the dipping tank is set at 15℃-25℃.

[0088] d. Calculate relevant winding parameters according to the process plan, perform computer simulation and verify the consistency between the calculated parameters and the actual winding.

[0089] e. Based on the mold 7, the fibers soaked in the resin solution are wound and formed to form the inner lining layer and the structural layer of the high-pressure container.

[0090] f. After winding is completed, the epoxy resin undergoes a curing reaction under heating conditions to form a three-dimensional network structure, forming an insoluble and infusible solid.

[0091] i. The surface of the high-pressure container formed by winding is polished to remove the glue nodules, and then a layer of weather-resistant gel coat is sprayed on the entire surface.

[0092] The large-diameter 1.6m to 4m, pressure-resistant container with a volume of 50m³ to 200m³ and a compressive strength of up to 10Mpa can be produced by the manufacturing method provided in this application. The container can store water, compressed air, solvents and chemical liquids, etc., with high storage density and long storage period, and is free from geographical constraints. It can be applied to energy, energy storage, energy storage and other fields, and can be widely promoted and applied.

[0093] This application adopts a composite material multi-dimensional winding molding process, adopts high-precision fully closed-loop computer programming logic control, and uses servo motor equal tension or variable tension to control the tension of the winding yarn. After the input parameters are realized, all product lines are automatically generated, and the entire process can be simulated and run, automatically generated and completed in the computer, so that the entire product winding process can be completed in one go.

[0094] The manufacturing method of the present application is applicable to spheres, polar hole tanks of various sizes, various types of cones, cylinders, elliptical cylinders, square cylinders, polygonal cylinders, combinations, etc.

[0095] The reinforcing material selected for the winding method in the manufacturing method of the present application can be high-strength glass fiber plied yarn, carbon fiber yarn, glass fiber or carbon fiber warp knitted fabric or felt, and the selected resin is a rubber-modified high-performance epoxy resin specially used for winding.

[0096] The specific technical solutions adopted are as follows:

[0097] Under the control of the PLC control system, the winding equipment inputs relevant parameters of the container such as barrel diameter, barrel length, winding angle, pole hole diameter, pole hole height, number of tangent points, yarn width, tension, winding speed, number of winding layers and other winding parameters. Among them, the process parameters of winding angle, number of tangent points, yarn width, tension, winding speed and number of winding layers are obtained through design calculation, and all product line types are automatically generated. The entire process can be simulated and run to automatically generate and complete relevant process parameters in the computer.

[0098] The winding equipment includes a base, a winding machine spindle 8 installed on the base, and the mold 7 is tightened and straightened by a chuck installed on the spindle 8. When the spindle 8 rotates, the mold 7 is driven to rotate. Four wheels that can move are set under the base to meet the technical specifications of φ4000, L15000mm winding, and the actual production length can be adjusted according to requirements. The base is also equipped with a locking device, which can be locked at any position of the track to meet the winding of products of various lengths. The system accurately controls the movement of the winding vehicle 9, the extension and contraction of the winding head 11, the rotation of the winding head 11 and the rotation of the spindle 8 through computer processing, so as to wind products of various shapes.

[0099] The winding equipment includes a winding car 9, which is driven by a servo motor. The servo motor drives a high-precision gapless planetary reducer to rotate and drives a small gear to move. The movement of the winding car 9 is controlled by a computer. The winding car 9 moves back and forth between the two ends of a limited linear guide rail. The maximum running speed of the winding car 9 is 1.0m / s.

[0100] The horizontal movement repeat positioning accuracy of the winding vehicle 9 is ±0.1mm.

[0101] The winding device includes a boom assembly 10, which is mounted on the winding vehicle 9 and driven by a precision ball screw. The boom assembly 10 is positioned and guided by a precision rolling linear guide. The boom assembly 10 is driven by a motor. The movement axis of the boom assembly 10 is perpendicular to the axis of the spindle 8. The maximum movement stroke of the boom assembly 10 is 1300 mm. The maximum operating speed of the boom assembly 10 is 1 m / s. The repeatability positioning accuracy of the boom assembly 10 is ±0.1 mm.

[0102] The winding device comprises a winding head 11, which can perform telescopic and rotational movements. The maximum operating speed of the winding head 11 is 150rp. The rotation range of the winding head 11 is 0-360°.

[0103] The winding head 11 adopts a high-precision servo motor, a servo driver, a servo transformer, and a high-precision gapless planetary reducer with a speed ratio of 10 and is controlled by a computer. The winding head 11 is a component that can be easily removed and various linear windings can be performed according to work instructions.

[0104] The winding equipment includes a dipping assembly 2, and the dipping assembly 2 includes a glue tank. The glue tank is synchronously extended and retracted with the extension and retraction of the winding head 11. The advantage is that when winding products such as cones, tanks, spheres, and assemblies, if the winding head 11 is extended and retracted, the yarn behind the winding head 11 will be loosened. The synchronous glue tank can effectively pull the loose yarn back to the rear of the glue tank, thereby maintaining the stability of the tension, so that high-quality products can be made. A glue roller is provided on the glue tank, and when the fiber passes through the glue roller, it can be covered with resin for winding. A scraper is provided behind the glue tank, and the gap between the scraper and the glue roller can be adjusted from large to small steplessly to ensure that the resin meets the usage amount and is basically not wasted. At the same time, the fiber and the resin are very well infiltrated by the size of the glue roller wrap angle and the speed of the dipping, thereby ensuring the quality of the product. The dipping tank uses a water bath temperature controller to control the temperature of the glue tank, and the control temperature can be adjusted arbitrarily between 0 and 80°C to ensure the viscosity and good wettability of the epoxy resin wound, thereby ensuring the quality of the product.

[0105] The winding device includes a yarn box 1, which can meet the needs of winding 24-48 yarns together, and the tension of each yarn is accurately controlled by a servo motor. The maximum yarn output speed of the yarn box 1 is 60m / min. The maximum operating speed of the yarn box 1 is 1.0m / s.

[0106] The winding tension is controlled in a closed loop by the tension detection component 5, which can effectively compensate for the tension fluctuation caused by the change of the yarn ball diameter and the yarn output speed. Each yarn ball has a separate tension controller, which can be combined arbitrarily according to the needs and connected to the tension detection component 5.

[0107] The winding equipment includes a software system. The winding software is a multi-axis linkage, highly automated, and highly controlled winding program designed specifically for winding. The software has data input and processing functions. The software can directly generate the following core mold shapes: cylinder, sphere, ellipsoid, cone, and rectangular body of revolution.

[0108] The large-diameter high-pressure resistant container proposed in the present application is wound and formed based on the metal liner mold 7. Under the action of the control system, a winding machine is used to wind and form the fiber filaments impregnated with the resin solution based on the mold 7 to respectively produce the inner lining layer and the reinforcement material structure layer of the high-pressure container, thereby obtaining the high-pressure container.

[0109] The weight ratio of fiber filaments and resin solution is 3:1. Fiber filaments include glass fiber, S high-strength fiber, Kevlar fiber, carbon fiber, basalt fiber and fiber felt. By introducing fiber felt and fiber filaments, and adjusting the structure of the fiber units that make up the fiber filaments and the proportion of the resin solution, the compressive strength of the obtained high-pressure container is further improved. Compared with the high-pressure container in which the fiber felt is not introduced during the winding process, the introduction of fiber felt into the fiber improves the interlayer connection strength between the fiber layer and the metal liner, and can effectively improve the air tightness of the fiber layer, so that the compressive strength and air tightness of the high-pressure container are more than doubled.

[0110] The inner wall of the composite pressure vessel lining is in direct contact with the metal liner. Its main functions are airtightness, corrosion resistance, temperature resistance and pressure resistance. The lining material has excellent airtightness, corrosion resistance, temperature resistance, high strength and high toughness.

[0111] The main function of the fiber-wound reinforced composite material layer is to ensure that the pressure vessel has sufficient strength, rigidity and stability under stress. The fiber is the main load-bearing body, and the resin plays a role in bonding the fiber and distributing and transferring the load between the fibers. Therefore, selecting high-strength, high-elasticity reinforcing fibers and good-performance resins is an important measure to improve the structural bearing capacity.

[0112] In order to improve the composite pressure vessel's resistance to external load impact, several layers of high-strength glass fiber composite materials with good impact resistance are usually wrapped around the outer surface, and the outer coating surface protection treatment is performed at the same time.

[0113] In a specific embodiment, the mixing mass ratio of the two-component epoxy resin used is 1:1. In a specific embodiment, the resin is mixed in a precise ratio by a special fluid mixing device to ensure the uniformity and reliability of the glue configuration ratio. This ensures the performance consistency of the fiber-wound tank body, the density of the winding layer and the pore-free product structure, and can effectively improve the overall stiffness of the fiber-wound tank body.

[0114] The specific mixing process is to transport the two components A and B of the epoxy resin into a special storage tank through a self-priming pump, and accurately control the resin output through a precision flow meter when the resin is needed, and then make each component completely mixed through a static mixer, and then put the mixed resin into the glue tank of the winding machine.

[0115] The resin is mixed using a special multi-component fluid mixing device, which includes basic operating units such as the component delivery pump, flow meter, heating, cooling and stirring, vacuum defoaming function, mixing switch, pneumatic control valve, safety valve, liquid level control switch, temperature control device, vacuum device, etc. The equipment flow rate is 20 kg / min or customized as required, and the delivery pump is connected to the raw material storage tank through a special pressure-resistant hose, and the storage tank volume is 50m³.

[0116] The storage tank has a heating system, stirring and vacuuming functions. It automatically feeds when the liquid level is lower than the low level through PLC control, and then automatically heats to 60℃-65℃. The heating function reduces the viscosity of the resin, and the vacuuming device can remove bubbles mixed in the resin under the condition of low viscosity and easy degassing of the resin.

[0117] The ratio of multi-component resins can be adjusted arbitrarily within the range of 1:1-100:1 according to actual requirements. After the degassing operation of different component resins is completed, the resin temperature can be stabilized in the range of 20-25°C required by the process after the cooling system is operated. The output within 0-20 kg each time ensures that the resin is supplied on demand without causing resin waste.

[0118] When the epoxy resin to be mixed is to be mixed, the two component air valves are opened, and then the A and B components flow through the static mixer. Relying on its special structure and the movement of the fluid, the immiscible fluids are dispersed and mixed with each other to achieve a fully uniform mixing effect. Once the static mixer is blocked, it can be easily replaced.

[0119] The fiber tension is controlled during the product forming process. The servo-type closed-loop electronic tensioner on the tension detection component 5 is used to apply tension to the fiber, which can effectively compensate for the tension fluctuation caused by the change of the yarn ball's diameter and yarn delivery speed. Each yarn ball has a separate tension controller, which can be combined arbitrarily according to needs and connected to the tension detection component 5.

[0120] In order to reasonably control the winding tension, give full play to the high strength characteristics of fiber materials, increase the bearing capacity of products, and improve the fatigue resistance of products. If the tension is unstable during winding or the tension size is improperly selected, it may cause the strength loss of the wound product. Therefore, fiber winding is the main process for composite material molding. The stress during the winding process is the main control variable in the fiber winding process, which directly affects the quality of the wound product. The winding tension is controlled between 1-50N during the process.

[0121] The mixing mass ratio of two-component epoxy resin is 100:100. The reason for using epoxy resin is that it has abundant raw materials, strong bonding force, simple manufacturing process, moderate price, small shrinkage after curing, high hardness and good toughness. Epoxy resin and fiber are well combined, and epoxy resin can be operated for a long time under certain conditions. The active epoxy groups in it undergo cross-linking reactions with various curing agents to form a fiber-reinforced thermosetting plastic structure with excellent mechanical properties.

[0122] The epoxy resin used in this application is a rubber-modified formula epoxy resin. The toughening agent is well compatible with the epoxy resin. After curing, the toughening agent disperses to form an "island structure". Under the action of external force, it can induce the generation of silver streaks and shear bands and hinder crack propagation. After modification, the high and low temperature impact toughness of the resin is improved, that is, the high toughness of the rubber is retained and the high mechanical properties of the epoxy resin are exhibited.

[0123] Optionally, the viscosity is 800-1200 mPa.s.

[0124] Optionally, the bisphenol A modified epoxy resin, the curing agent is phthalic anhydride, the curing exothermic peak is ≤110°C, and the operating applicable period is up to 7-8 hours at 25°C.

[0125] Optionally, the elongation of the resin after curing is 3-8%.

[0126] Optionally, the resin curing process operation window is ≤90°C and ≤10 hours.

[0127] Optionally, the glass transition temperature of the resin after curing is 85-120°C.

[0128] Optionally, the resin has a Barcol hardness of ≥40 after curing.

[0129] The process of reinforcing the composite material layer of the composite pressure vessel of the present application includes: under certain controlled tension and predetermined winding line conditions, continuous fibers impregnated with resin glue are wound on the outer surface of the metal liner until the number of winding layers required by the design is reached. The strength of the fiber filaments in the principal stress direction is fully utilized, and the strength utilization rate, stress balance coefficient, tension control, polar hole change and number of tangent points of the fiber filaments in the circumferential and spiral directions are calculated, and then cured, inspected and the outer surface treated.

[0130] According to the different fiber winding line types, the basic winding line types can be divided into three types: circumferential winding, longitudinal winding and spiral winding. In the actual winding molding, the present application adopts a variety of line types for winding, so as to give full play to the anisotropic characteristics of the composite material, such as spiral plus circumferential winding, spiral plus longitudinal winding, etc.

[0131] Optionally, glass fiber yarn 1200tex or 2400tex is used, and the number of hoop winding layers is ≥15 layers.

[0132] Optionally, glass fiber yarn 1200tex or 2400tex is used, and the number of spirally wound layers is ≥12 layers.

[0133] Optionally, the total winding thickness is ≥24 mm.

[0134] The fibers wound in the present application are neither overlapped nor separated, and are evenly and continuously spread over the surface of the mold 7. The position of the fibers on the surface of the mold 7 is stable and does not slip. The fiber winding trajectory is wound along the geodesic line. At the same time, the fiber winding line type, winding angle, speed ratio, and tension curing system are process designed.

[0135] The pressure-resistant container produced by the manufacturing method provided in this application has a diameter of 1.6m to 4m, a volume of 50m³ to 200m³, a strength of up to 6.9Mpa working pressure, a water pressure test strength of 9.8Mpa, and a pressure-resistant burst strength of up to 15Mpa. During the manufacturing process, the container head, cylinder and pole hole are integrated into a single unit. The container can hold water, compressed air, solvents and chemical liquids, etc. It has a high storage density and a long storage period. It is free from geographical constraints and can be installed, processed and manufactured anywhere, and can be widely promoted and applied.

[0136] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. Winding equipment for large-volume high-pressure composite pressure vessels, including: Yarn box (1), dipping assembly (2), damping assembly (3), yarn collecting assembly (4), tension detection assembly (5), winding assembly (6), mold (7) and main shaft (8); It is characterized by further comprising: A winding vehicle (9) is arranged on one side of the mold (7), and the winding vehicle (9) can move along the axial direction of the mold (7); A telescopic component (10) is telescopically arranged on the winding vehicle (9), and the telescopic component (10) can move along the radial direction of the mold (7); A winding head (11) is arranged at the telescopic end of the telescopic component (10), and the winding head (11) can swing arbitrarily in the direction of the mold (7); The winding head (11) comprises: A base (1101) is fixedly arranged at the telescopic end of the telescopic assembly (10); An outer rotating member (1104) is rotatably disposed on the base (1101), and the outer rotating member (1104) is provided with an outer inclined arm (1105); A middle-layer rotating member (1103) is rotatably disposed on the outer-layer rotating member (1104), wherein the middle-layer rotating member (1103) is provided with a middle-layer inclined arm (1107); An inner rotating member (1102) is rotatably disposed on the middle rotating member (1103), wherein the inner rotating member (1102) is provided with an inner inclined arm (1109); An outer layer curved arm (1106), one end of which is rotatably connected to the outer layer inclined arm (1105), and the other end of which is rotatably connected to the swing plate (1111); A middle layer curved arm (1108), one end of which is rotatably connected to the middle layer inclined arm (1107), and the other end of which is rotatably connected to the swing plate (1111); The inner layer curved arm (1110) has one end rotatably connected to the inner layer inclined arm (1109) and the other end rotatably connected to the swing plate (1111).

2. The winding forming equipment for large-volume high-pressure resistant composite pressure vessels according to claim 1 is characterized in that: An inner cylinder (1116) is provided on the base (1101), and the inner cylinder (1116) passes through the inner rotating member (1102).

3. The winding forming equipment for large-volume high-pressure resistant composite pressure vessels according to claim 1 is characterized in that: The winding head (11) further comprises: An inner layer driving member (1113) is arranged on the base (1101), and the inner layer driving member (1113) and the inner layer rotating member (1102) are driven by a worm gear; An outer layer driving member (1114) is arranged on the base (1101), and the outer layer driving member (1114) and the outer layer rotating member (1104) are driven by a worm gear; The middle-layer driving member (1115) is arranged on the base (1101), and the middle-layer driving member (1115) and the middle-layer rotating member (1103) are driven by a worm gear.

4. The winding forming equipment for large-volume high-pressure resistant composite pressure vessels according to claim 1 is characterized in that: The swing disk (1111) is provided with an end assembly (1112), and the end assembly (1112) is always oriented toward the winding direction of the fibers.

5. The winding forming equipment for large-volume high-pressure resistant composite pressure vessels according to claim 4 is characterized in that: The end component (1112) is provided with a deviation detection component (1117), and the deviation detection component (1117) comprises: An outer frame (11171) is fixedly mounted on the end assembly (1112); An inner frame (11174) is arranged inside the outer frame (11171); A connecting beam (11172) connecting the outer frame (11171) and the inner frame (11174); A strain gauge (11173) mounted on the connecting beam (11172); The guide hole (11175) is opened on the inner frame (11174).

6. The winding forming equipment for large-volume high-pressure resistant composite pressure vessels according to claim 4 is characterized in that: The terminal assembly (1112) is provided with a winding roller (1118), and the winding roller (1118) comprises: A rotating shaft (11181) is rotatably disposed on the end assembly (1112); A cylinder wall (11182) is arranged on the outer periphery of the rotating shaft (11181); A sliding sleeve (11184) is slidably mounted on the rotating shaft (11181); A connecting rod (11183), one end of which is rotatably connected to the cylinder wall (11182), and the other end of which is rotatably connected to the sliding sleeve (11184); The retaining ring (11186) is arranged between the sliding sleeve (11184) and the end assembly (1112), and a pressure sensor (11188) is arranged on the retaining ring (11186).

7. The winding forming equipment for large-volume high-pressure resistant composite pressure vessels according to claim 6 is characterized in that: The rotating shaft (11181) is provided with an annular groove (11189), and the cylinder wall (11182) is provided with an inserting plate (11190), and the inserting plate (11190) is slidably inserted in the annular groove (11189).

8. The winding forming equipment for large-volume high-pressure resistant composite pressure vessels according to claim 6, characterized in that: The pressure sensor (11188) is arranged between the retaining ring (11186) and the end assembly (1112); the sliding sleeve (11184) is rotatably connected to the retaining ring (11186) via a first bearing (11185); and the first bearing (11185) is a thrust bearing; The rotating shaft (11181) is rotatably connected to the end assembly (1112) via a second bearing (11187), and the second bearing (11187) is a deep groove ball bearing.

9. A winding process for a large-volume high-pressure resistant composite pressure vessel, based on the winding equipment for a large-volume high-pressure resistant composite pressure vessel according to any one of claims 1 to 8, characterized in that: The steps include: a. The spindle (8) and the mold (7) are locked and fixed, and the mold (7) is used as the base liner and the surface is sandblasted and rust-removed for protection; b. The fibers are dried and dehydrated and then mounted on a yarn box (1), passed through a dipping assembly (2), a damping assembly (3), a yarn collection assembly (4) and a tension detection assembly (5), and finally introduced into a winding assembly (6); c. Mix the epoxy resin in proportion and pour it into the dipping tank of the dipping component (2), and set the temperature of the dipping tank at 15°C-25°C; d. Calculate relevant winding parameters according to the process plan, conduct computer simulation operation, and verify the consistency between the calculated parameters and the actual winding; e. Based on the mold (7), the fibers soaked in the resin solution are wound to form the inner lining layer and the structural layer of the high-pressure container; f. After winding is completed, the epoxy resin undergoes a curing reaction under heating conditions to form a three-dimensional network structure, forming an insoluble and infusible solid; i. The surface of the high-pressure container formed by winding is polished to remove the glue nodules, and then a layer of weather-resistant gel coat is sprayed on the entire surface.

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