IV-type hydrogen storage cylinder plastic liner hydrogen permeation resistance coating laying method and device

Abstract

The invention relates to the field of liner coating, in particular to an IV-type hydrogen storage cylinder plastic liner hydrogen permeation resistance coating laying method and device, and the device comprises a mounting rack, a fixed frame, a rotating assembly and the like; a fixing frame is rotationally connected to the mounting rack; a rotating shaft for driving the fixing frame to rotate is arranged on the mounting frame; a rotating assembly used for assisting in coating the inner container with paint is installed on the fixing frame. A plurality of limiting blocks are connected to the fixing frame in a sliding mode. The inner wall of the inner container is evenly coated with paint through the air bag, the drying mode is achieved, compared with the mode that brushing is conducted through a rolling roller in the prior art, the air bag can adapt to the inner containers of different shapes, the more convenient and better coating effect is achieved, and the coating efficiency is improved. And the dried coating on the surface of the air bag can be conveniently treated by follow-up manual work, the air bag can be controlled to be repeatedly expanded so that the dried coating on the surface of the air bag can rapidly fall off, rapid cleaning is achieved in cooperation with manual work, and the applicability and convenience of equipment in use are improved.

Description

Technical Field

[0001] This invention relates to the field of inner liner coating, and more particularly to a hydrogen permeation-resistant coating application and equipment for a type IV hydrogen storage bottle plastic inner liner. Background Technology

[0002] Because hydrogen molecules can easily permeate through the micropores of materials, a hydrogen permeation barrier layer is usually applied to the inner wall of the hydrogen storage tank to improve its sealing and storage efficiency. Current technology typically involves injecting liquid coating into the inner liner and then fixing it to a rotating device. Rotation distributes the liquid coating across the inner liner surface. However, the roughness of the inner liner surface affects the adhesion and uniformity of the coating, resulting in uneven coating application. Furthermore, after coating, the coating on the inner liner usually needs to be dried. Current technology typically involves placing the coated inner liner in a heating chamber for uniform heating or heating it during the rotational coating process. However, the coating in the inner liner is not fully cured and remains fluid, leading to coating drips on the inner wall during transfer drying or rotary drying, resulting in uneven coating thickness. Summary of the Invention

[0003] To overcome the drawback that the coating in the inner liner of a hydrogen storage bottle is not fully cured and remains fluid during the drying process after coating, resulting in coating dripping on the inner wall of the liner during transfer drying or rotary coating drying, and causing uneven coating thickness, this invention provides a hydrogen permeation barrier coating application and equipment for a type IV hydrogen storage bottle plastic inner liner.

[0004] The technical solution of this invention is as follows: a hydrogen permeation barrier coating application device for a type IV hydrogen storage cylinder plastic liner, comprising a mounting frame, a fixing frame, and a rotating assembly; the fixing frame is rotatably connected to the mounting frame; a rotating shaft for driving the fixing frame to rotate is provided on the mounting frame; a rotating assembly for assisting in coating the liner is installed on the fixing frame; several limiting blocks are slidably connected to the fixing frame; it also includes a first fixing block, a sleeve rod, a gas delivery pipe, a fixing rod, a second connecting block, and a gasbag; the first fixing block is provided on the fixing frame, and the first fixing block is provided with several first connecting blocks; the first fixing block has a receiving cavity. The first fixing block has an opening; a fixing rod is fixedly connected to the first fixing block; a sleeve rod is slidably connected to the fixing rod, and the sleeve rod is a hollow structure; a connecting pipe is provided on the sleeve rod, and the connecting pipe is connected to an external gas supply device; a second connecting block is fixedly connected to the sleeve rod, and the diameters of both the fixing rod and the second connecting block are smaller than the diameter of the inner liner bottle opening; a gas supply pipe for transmitting gas is slidably connected inside the sleeve rod; the right side of the second connecting block and the right end of the gas supply pipe are connected to an air bladder for coating; several air outlets are provided on the gas supply pipe; a limit plate is provided on the air bladder, and the limit plate is made of an elastic deformable material.

[0005] Preferably, the rotating assembly includes a motor and a clamping mechanism; the motor is fixedly connected to the fixed frame; and the clamping mechanism is fixedly connected to the motor output shaft.

[0006] Preferably, it also includes support rods; a rubber ring is provided on the airbag; a first connecting ring is provided on the right end of the sleeve rod; several support rods are rotatably connected to the first connecting ring of the sleeve rod by a torsion spring, and the right side of each support rod is fixedly connected to the rubber ring; all support rods are located inside the airbag.

[0007] Preferably, it also includes a second fixing block, a connecting rod, and a compression ring; several connecting rods are slidably connected to the fixing rod; all connecting rods are fixedly connected to a compression ring for limiting the deployment of the support rod on the side near the airbag; a second fixing block is slidably connected to the sleeve rod, and the second fixing block is fixedly connected to all connecting rods.

[0008] Preferably, the system also includes a second connecting ring and a third connecting block; the air supply pipe has several protrusions; the sleeve has several grooves, and each protrusion is fitted into an adjacent groove; the air supply pipe has a sliding groove; several second connecting rings are slidably connected to the sliding groove; several third connecting blocks are fixed to each second connecting ring by an elastic rope; several thin surfaces are provided inside the airbag, and each third connecting block is fixed to an adjacent thin surface; the right end of the air supply pipe is rotatably connected to the limiting plate of the airbag.

[0009] Preferably, each second connecting ring is configured as an I-shaped ring.

[0010] Preferably, it also includes a suction pipe; a suction pipe for improving the debris cleaning effect is fixedly connected to the first fixing block, the suction pipe is connected to an external pump, and the suction pipe is connected to the storage cavity.

[0011] Preferably, it also includes a storage box; the storage box for collecting excess paint is rotatably connected to the first fixing block, and the storage box is connected to an external paint collection device; both the first fixing block and the storage box are provided with several interconnecting holes in opposite positions.

[0012] Preferably, the storage box and the first fixing block are configured as a damped rotational connection.

[0013] Preferably, the contact area between the first fixing block and the inner liner is provided with a rubber layer for sealing the bottle opening of the inner liner.

[0014] The beneficial effects of the present invention are as follows: The present invention realizes the method of uniformly coating the coating on the inner wall of the inner liner by means of an airbag and drying it. Compared with the existing technology of using a roller to brush the coating, the airbag can not only adapt to inner liners of different shapes and achieve a more convenient and better coating effect, but also facilitates the subsequent manual treatment of the dried coating on the surface of the airbag. The airbag can be controlled to expand repeatedly to make the dried coating on the surface of the airbag fall off quickly, and can be cleaned quickly by manual labor, thus improving the applicability and convenience of the equipment. By setting a rubber layer at the contact point between the first fixing block and the inner liner, the bottle opening of the inner liner is sealed, thereby preventing harmful gases from escaping to the outside and harming human health, and providing a safe and reliable working environment for the staff. By pulling the thin surface of the airbag with the third connecting block, some parts of the airbag are concave towards the center and stacked in a folded manner. When the airbag contracts, the solidified coating on the surface of the airbag is trapped and blocked by the adjacent folds, which minimizes the amount of coating debris remaining inside the inner liner and reduces the difficulty of subsequent manual cleaning. By setting the second connecting ring in an I-shape, and ensuring that the length of the second connecting ring is sufficient to accommodate four elastic ropes being wound together, the elastic ropes are limited to prevent them from slipping onto the air supply pipe, thus ensuring that the airbag is stably stored and folded. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the hydrogen permeation barrier coating application and equipment for the plastic inner liner of the Type IV hydrogen storage bottle of the present invention. Figure 2 This is a diagram showing the inflated state of the airbag of the present invention; Figure 3 This is a cross-sectional view of the airbag and inner liner assembly of the present invention; Figure 4 This is a three-dimensional structural diagram of the combination of the second connecting ring and the third connecting block of the present invention; Figure 5 This is a cross-sectional view of the first fixing block and storage box assembly of the present invention; Figure 6 This is a cross-sectional view of the combination of the fixing rod and the second connecting block of the present invention; Figure 7 This is a cross-sectional view of the sleeve rod of the present invention; Figure 8 This is a three-dimensional structural diagram of the sleeve rod and the second fixing block combination of the present invention; Figure 9 This is an inverted view of the airbag and inner bladder of the present invention; Figure 10 This is an exploded view of the first fixing block, sleeve, and airbag of the present invention; Figure 11 This is a diagram showing the sleeve, gas pipe, support rod, and compression ring of the present invention in their stored state.

[0016] Explanation of reference numerals in the attached drawings: 1-Mounting bracket, 1001-Rotating shaft, 2-Fixing frame, 2001-Limiting block, 3-First fixing block, 3001-First connecting block, 3002-Storage cavity, 4-Sleeve rod, 4001-Connecting pipe, 4002-First connecting ring, 4003-Groove, 5-Air supply pipe, 5001-Air outlet, 5002-Protrusion, 5003-Slide groove, 6-Airbag, 6001-Rubber ring, 6002-Limiting plate, 6003-Thin surface, 7-Inner liner, 101-Fixing rod, 102-Second connecting block, 103-Support rod, 201-Second fixing block, 202-Connecting rod, 203-Extrusion ring, 301-Second connecting ring, 302-Third connecting block, 401-Suction tube, 402-Storage box, 501-Motor, 502-Clamping mechanism. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Example 1 A type IV hydrogen storage cylinder plastic inner liner 7 hydrogen permeation barrier coating application and equipment, such as Figures 1-11 As shown, it includes a mounting frame 1, a fixed frame 2, and a rotating assembly; the fixed frame 2 is rotatably connected to the mounting frame 1; a rotating shaft 1001 is provided on the mounting frame 1; the rotating assembly is installed on the fixed frame 2; two limit blocks 2001 are slidably connected to the fixed frame 2. It also includes a first fixing block 3, a sleeve rod 4, an air supply pipe 5, a fixing rod 101, a second connecting block 102, and an airbag 6; the fixing frame 2 is provided with a first fixing block 3, and the first fixing block 3 is provided with two first connecting blocks 3001; the first fixing block 3 has a storage cavity 3002 and an opening; the fixing rod 101 is fixedly connected to the first fixing block 3; the sleeve rod 4 is slidably connected to the fixing rod 101, and the sleeve rod 4 is designed as a hollow structure; the sleeve rod 4 is provided with a connecting pipe 4001, and... The connecting pipe 4001 is connected to the external gas supply device; the right end of the sleeve 4 is fixedly connected to the second connecting block 102, and the diameters of the fixed rod 101 and the second connecting block 102 are both smaller than the diameter of the inner liner 7 bottle mouth; the gas supply pipe 5 is slidably connected inside the sleeve 4; the right side of the second connecting block 102 and the right end of the gas supply pipe 5 are connected to the airbag 6; the gas supply pipe 5 is provided with several air outlets 5001 inside the airbag 6; the right side of the airbag 6 is provided with a limiting plate 6002, and the limiting plate 6002 is made of elastic deformation material.

[0019] The rotating assembly includes a motor 501 and a clamping mechanism 502; the motor 501 is fixedly connected to the fixed frame 2; the output shaft of the motor 501 is fixedly connected to the clamping mechanism 502, which fixes and limits the inner liner 7, and controls the motor 501 to drive the clamping mechanism 502 and the inner liner 7 to rotate, so that the coating inside the inner liner 7 adheres to the inner wall of the inner liner 7 as the inner liner 7 rotates, thereby achieving the coating of the inner wall of the inner liner 7.

[0020] It also includes a support rod 103; a rubber ring 6001 is provided on the airbag 6; a first connecting ring 4002 is provided on the right end of the sleeve rod 4; several support rods 103 are rotatably connected to the first connecting ring 4002 of the sleeve rod 4 by a torsion spring, and the right side of each support rod 103 is fixedly connected to the rubber ring 6001; all support rods 103 are located inside the airbag 6.

[0021] It also includes a second fixing block 201, a connecting rod 202 and a compression ring 203; two connecting rods 202 are slidably connected to the fixing rod 101; all connecting rods 202 are fixedly connected to the compression ring 203 on the side near the airbag 6; the second fixing block 201 is slidably connected to the sleeve rod 4, and the second fixing block 201 is fixedly connected to all connecting rods 202.

[0022] It also includes a second connecting ring 301 and a third connecting block 302; the air supply pipe 5 is provided with several protrusions 5002; the sleeve rod 4 is provided with several grooves 4003, and each protrusion 5002 is fitted into an adjacent groove 4003; the air supply pipe 5 is provided with a sliding groove 5003; six second connecting rings 301 are slidably connected to the sliding groove 5003; four third connecting blocks 302 are fixedly connected to each second connecting ring 301 by an elastic rope; several thin surfaces 6003 are provided inside the airbag 6, and each third connecting block 302 is fixedly connected to an adjacent thin surface 6003; the right end of the air supply pipe 5 is rotatably connected to the limiting plate 6002 of the airbag 6.

[0023] Each second connecting ring 301 is designed in an I-shape to limit the elastic rope, preventing it from slipping onto the air supply pipe 5 and ensuring that the airbag 6 is stably stored and folded.

[0024] It also includes a suction tube 401; the suction tube 401 is fixedly connected to the first fixing block 3, the suction tube 401 is connected to the external pump, and the suction tube 401 is connected to the receiving cavity 3002.

[0025] It also includes a storage box 402; the storage box 402 is rotatably connected to the left side of the first fixing block 3, and the storage box 402 is connected to the external paint collection device; both the first fixing block 3 and the storage box 402 are provided with several interconnecting holes in opposite positions.

[0026] The storage box 402 and the first fixing block 3 are configured with a damped rotation connection to prevent misalignment between the first fixing block 3 and the connecting hole inside the storage box 402, which would affect the collection of excess paint.

[0027] A rubber layer is provided at the contact point between the first fixing block 3 and the inner liner 7 to prevent harmful gases from escaping to the outside during the drying process of the inner liner 7 and harming human health.

[0028] The working steps of this embodiment are as follows: First, a suitable amount of paint is manually poured into the inner liner 7. Then, the sleeve rod 4, the air supply tube 5, and the air bag 6 are inserted into the bottle opening of the inner liner 7 to the right until the placement port of the first fixing block 3 blocks the bottle opening of the inner liner 7. The inner liner 7 containing the paint is then fixed on the clamping mechanism 502. The first connecting block 3001 of the first fixing block 3 is supported on the limiting block 2001. At this time, the inner liner 7 is in a horizontal state, and the paint is piled up horizontally inside the inner liner 7. Then, the limiting block 2001 is manually pushed to the right until the limiting block 2001 locks the first connecting block 3001 onto the fixing frame 2, thereby completing the fixing of the first fixing block 3. At this time, the air supply tube 5 and the air bag 6 are both located inside the inner liner 7. It should be noted that in the initial state, the air bag 6 is in a contracted state.

[0029] After the first fixing block 3 is fixed, the motor 501 is started, causing the motor 501 to drive the clamping mechanism 502 and the inner liner 7 to rotate. The first fixing block 3 remains stationary. Since the inner liner 7 contains paint, the inner wall of the inner liner 7 will gradually be coated with paint due to the rotation. After rotating for a period of time, the inner wall of the inner liner 7 will be completely coated with paint. Then, using the front-to-back view as a reference, the rotating shaft 1001 is manually rotated 90 degrees counterclockwise, so that the rotating shaft 1001 drives the fixing frame 2 to face downwards. Figure 9As shown, at this time, the excess paint inside the inner liner 7 will slide down the bottle mouth due to gravity and be collected inside the storage cavity 3002 of the first fixing block 3. It will also fall into the storage box 402 through the connecting hole between the first fixing block 3 and the storage box 402. The excess paint will be collected by the external paint collection device to avoid paint waste. During the process of the excess paint inside the inner liner 7 sliding down the bottle mouth due to gravity, the paint will coat the bottle mouth. Then, the external gas supply device will supply hot air into the connecting pipe 4001. The hot air will be sprayed out from the air outlet 5001 through the sleeve rod 4 and the gas supply pipe 5 and enter the airbag 6. At this time, the airbag 6 will gradually inflate. When the airbag 6 is fully inflated, the internal structure of the airbag 6 is the same as that of the inner liner 7, but the size of the airbag 6 is smaller than that of the inner liner 7. At this time, the paint is located between the outer surface of the airbag 6 and the inner wall of the inner liner 7. As the inner liner 7 continues to rotate, the paint on the inner wall of the inner liner 7 will be coated. The coating is evenly applied to the inner wall of the inner liner 7 via the airbag 6 and gradually dried by the heat radiation effect of the hot air inside the airbag 6. After the airbag 6 expands and evenly coats the inner wall of the inner liner 7 for a period of time, the external air supply device is controlled to reverse and extract the gas inside the airbag 6, causing the airbag 6 to deflate and be reattached to the air supply pipe 5. Then, the sleeve 4, air supply pipe 5, and airbag 6 are manually removed from the inner liner 7. In this way, the method of evenly coating and drying the coating on the inner wall of the inner liner 7 using the airbag 6 is more convenient than the brushing method using a rolling roller in the prior art. The airbag 6 can not only adapt to inner liners 7 of different shapes and achieve a more convenient and better coating effect, but also facilitates the subsequent manual treatment of the dried coating on the surface of the airbag 6. The airbag 6 can be repeatedly expanded to make the dried coating on the surface of the airbag 6 fall off quickly, and manual cleaning can be achieved, improving the applicability and convenience of the equipment.

[0030] Meanwhile, in existing technologies, the coated inner liner 7 is usually placed in a heating chamber for uniform heating, or heated during the coating process by rotating the inner liner 7 using a rotating device. However, the coating in the inner liner 7 is not completely cured and still has fluidity, which causes the coating on the inner wall of the inner liner 7 to sag during the transfer drying or coating rotation drying process, resulting in uneven coating thickness on the inner liner 7. To solve the above problems, the present invention introduces hot air into the airbag 6 and uses thermal radiation to dry the inner wall of the inner liner 7 after coating and continuous rotation, thereby avoiding the sag phenomenon on the inner wall of the inner liner 7 and ensuring uniform coating thickness on the inner liner 7.

[0031] It should be noted that when the hot air inside the airbag 6 dries the inner liner 7, harmful gases will be generated during the coating drying process. By setting a rubber layer at the contact point between the first fixing block 3 and the inner liner 7, the bottle opening of the inner liner 7 is sealed, thereby preventing harmful gases from escaping to the outside and harming human health, and providing a safe and reliable working environment for the staff.

[0032] After the coating on the inner wall of the inner liner 7 has dried, when the airbag 6 needs to be removed from the inner liner 7, the inflated airbag 6 needs to be contracted first. However, since the outer surface of the airbag 6 also has coating adhering to it during the coating process, there is already cured coating on its surface. When the airbag 6 contracts, the cured coating will rupture, causing the broken coating fragments to fall into the inner liner 7, increasing the difficulty of subsequent manual cleaning.

[0033] To resolve the above situation, the external air supply device is controlled to slowly draw in the hot air inside the airbag 6, causing the airbag 6 to gradually contract. It should be noted that the inner liner 7 remains in an inverted position during this time. Figure 9 As shown, the sleeve rod 4 is then slowly rotated manually. The sleeve rod 4, through the groove 4003, drives the protrusion 5002 of the air supply pipe 5 to rotate together, thereby causing the air supply pipe 5 to drive the second connecting ring 301 to rotate together. The elastic rope is stretched and deformed until it can no longer deform. The elastic rope will gradually wrap around the adjacent second connecting ring 301 and pull the adjacent third connecting block 302 closer to the air supply pipe 5. Since the third connecting block 302 is fixed to the adjacent thin surface 6003 on the airbag 6, the thin surface 6003 will move closer to the air supply pipe 5 along with the third connecting block 302. Then, the sleeve rod 4 and the second connecting block 102 are slowly pushed upwards, thereby causing the lower side of the airbag 6 to move upwards. Gradually fold upwards until the airbag 6 is fully retracted. Finally, remove the first fixing block 3, sleeve rod 4, and airbag 6 from the inner liner 7 as a whole. During the gradual upward folding of the lower side of the airbag 6, the thin surface 6003 pushes the second connecting ring 301 to slide on the slide groove 5003 by the third connecting block 302. In this way, the third connecting block 302 pulls the thin surface 6003 on the airbag 6, causing part of the airbag 6 to be concave towards the center and folded. When the airbag 6 retracts, the solidified coating on the surface of the airbag 6 is trapped and blocked by the adjacent folds, minimizing the amount of coating debris remaining inside the inner liner 7 and reducing the difficulty of subsequent manual cleaning.

[0034] It should be noted that during the slow manual rotation of the lever 4, which causes the air supply pipe 5 to rotate together with the second connecting ring 301, the elastic rope gradually wraps around the adjacent second connecting ring 301. However, the elastic rope may slip off the adjacent second connecting ring 301 and wrap around the air supply pipe 5. This can cause the elastic rope to obstruct the sliding of the second connecting ring 301 on the slide groove 5003 during the subsequent manual pushing of the lever 4 to gradually fold the airbag 6 upwards. To avoid this situation, the second connecting ring 301 is designed in an I-shape, and its length is sufficient to accommodate four elastic ropes to wrap around together. This limits the elastic rope, prevents it from slipping onto the air supply pipe 5, and ensures the stable folding and folding of the airbag 6.

[0035] Since the airbag 6 has the same structure as the inner liner 7 after inflation but is different in size, when the sleeve rod 4 and the second connecting block 102 are pushed upwards manually, the part where the airbag 6 is connected to the second connecting block 102 will be concave inwards, causing the side of the airbag 6 to contract and fold in a concave state. This prevents the side of the airbag 6 from forming a wrinkle shape smoothly, thus affecting the coating debris encapsulation effect. To solve the above problem, the first connecting ring 4002 of the sleeve rod 4 drives the support rod 103 to move upwards together, and then the support rod 103 drives the rubber ring 6001 of the airbag 6 to move upwards together for storage. This allows the airbag 6 to be stored and folded upwards from the junction of the cylindrical and conical parts. Compared with storing and folding upwards from the conical part, this helps to ensure that the side of the airbag 6 can form a wrinkle shape smoothly, ensuring the coating debris encapsulation effect.

[0036] It should be noted that, in the initial state, since the airbag 6 is in a retracted state, to prevent the support rod 103 from forcing the airbag 6 to deploy and thus preventing the airbag 6 from being smoothly inserted into the inner liner 7, the support rod 103 and the first connecting ring 4002 are configured to be rotatably connected via a torsion spring, and the initial state of the support rod 103 is as follows: Figure 11 As shown, the compression ring 203 compresses and limits all the support rods 103, causing all the support rods 103 to retract toward the air supply pipe 5. This causes the support rods 103 to drive the rubber ring 6001 to contract, thereby preventing the support rods 103 from forcing the airbag 6 to unfold, which would prevent the airbag 6 from being inserted smoothly into the inner liner 7.

[0037] When the airbag 6 is inserted into the inner liner 7 and inflates, the inner liner 7 is in a vertically downward position, as shown below. Figure 9 As shown, manually pulling down the second fixing block 201 causes the connecting rod 202 and the compression ring 203 to slide downwards relative to the sleeve rod 4, thereby causing the compression ring 203 to gradually move away from the first connecting ring 4002. This prevents the compression ring 203 from further compressing and limiting the support rod 103. At this time, the support rod 103, through the torsion spring force, causes the rubber ring 6001 of the airbag 6 to gradually unfold, thus fully inflating the airbag 6. When the inner liner 7 is dried and the airbag 6 has contracted, manually pushing up the second fixing block 201 causes it to slide upwards relative to the sleeve rod 4, moving the connecting rod 202 and the compression ring 203 upwards together. The compression ring 203 gradually compresses the support rod 103, causing all the support rods 103 to rotate around the first connecting ring 4002 and gradually converge towards the sleeve rod 4. Figure 11 As shown, until all support rods 103 can be smoothly removed from the bottle neck of the inner liner 7.

[0038] Simultaneously, when the airbag 6 is folded and stored, the external pump is activated, and the suction tube 401 is used to suction the storage cavity 3002 of the first fixing block 3. This not only allows for the unified treatment of harmful gases, but also, since the storage cavity 3002 of the first fixing block 3 is connected to the inside of the inner liner 7, it can also generate suction force at the bottle opening of the inner liner 7. This causes the cured paint that has fallen off the surface of the airbag 6 to converge towards the bottle opening of the inner liner 7 and finally be collected in the storage cavity 3002, further improving the cleaning effect of the paint debris that has fallen off inside the inner liner 7.

[0039] It should be noted that before starting the external pump, the storage box 402 should be manually rotated so that the flow hole between the storage box 402 and the first fixing block 3 is no longer aligned and the storage box 402 is no longer connected to the first fixing block 3. This will prevent debris from passing through the flow hole and falling into the storage box 402, thus preventing contamination of the excess paint collected inside the storage box 402.

[0040] Finally, after the first fixing block 3, sleeve rod 4 and airbag 6 are removed from the inner liner 7 as a whole, with the front to back view as a reference, manually rotate the rotating shaft 1001 clockwise by 90 degrees to reset the inner liner 7 to be parallel to the ground, and remove the dried inner liner 7. Then fix the next uncoated inner liner 7 and repeat the above operation to complete the coating operation of the inner liner 7 in sequence.

[0041] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A hydrogen permeation barrier coating application and equipment for a type IV hydrogen storage cylinder plastic liner, comprising a mounting frame (1), a fixed frame (2), and a rotating assembly; the fixed frame (2) is rotatably connected to the mounting frame (1); a rotating shaft (1001) for driving the fixed frame (2) to rotate is provided on the mounting frame (1); a rotating assembly for assisting the coating application on the liner (7) is installed on the fixed frame (2); a plurality of limiting blocks (2001) are slidably connected to the fixed frame (2); characterized in that: It also includes a first fixing block (3), a sleeve rod (4), an air supply pipe (5), a fixing rod (101), a second connecting block (102), and an airbag (6); the fixing frame (2) is provided with a first fixing block (3), and the first fixing block (3) is provided with several first connecting blocks (3001); the first fixing block (3) has a storage cavity (3002) and an opening; the first fixing block (3) is fixedly connected to the first fixing block (3); the sleeve rod (4) is slidably connected to the fixing rod (101), and the sleeve rod (4) is a hollow structure; the sleeve rod (4) is provided with a connecting pipe (4001). ), and the connecting pipe (4001) is connected to the external gas supply device; a second connecting block (102) is fixed on the sleeve (4), and the diameters of the fixed rod (101) and the second connecting block (102) are both smaller than the diameter of the bottle mouth of the inner liner (7); a gas supply pipe (5) for transmitting gas is slidably connected inside the sleeve (4); the right side of the second connecting block (102) and the right end of the gas supply pipe (5) are connected together to an air bag (6) for coating; a number of air outlets (5001) are provided on the gas supply pipe (5); a limiting plate (6002) is provided on the air bag (6), and the limiting plate (6002) is made of elastic deformation material.

2. The method and equipment for applying a hydrogen permeation-resistant coating to the plastic inner liner of a Type IV hydrogen storage cylinder according to claim 1, characterized in that: The rotating assembly includes a motor (501) and a clamping mechanism (502); the motor (501) is fixedly connected to the fixed frame (2); the output shaft of the motor (501) is fixedly connected to the clamping mechanism (502).

3. The method and equipment for applying a hydrogen permeation-resistant coating to the plastic inner liner of a Type IV hydrogen storage cylinder according to claim 1, characterized in that: It also includes support rods (103); rubber rings (6001) are provided on the airbag (6); a first connecting ring (4002) is provided on the right end of the sleeve rod (4); several support rods (103) are rotatably connected to the first connecting ring (4002) of the sleeve rod (4) by a torsion spring, and each support rod (103) is fixed to the right side of the rubber ring (6001); all support rods (103) are located inside the airbag (6).

4. The hydrogen permeation barrier coating application and equipment for a type IV hydrogen storage cylinder plastic liner according to claim 3, characterized in that: It also includes a second fixing block (201), a connecting rod (202) and a compression ring (203); a number of connecting rods (202) are slidably connected to the fixing rod (101); all connecting rods (202) are fixedly connected to a compression ring (203) for limiting the deployment of the support rod (103) on the side near the airbag (6); the second fixing block (201) is slidably connected to the sleeve rod (4), and the second fixing block (201) is fixedly connected to all connecting rods (202).

5. The method and equipment for applying a hydrogen permeation-resistant coating to the plastic inner liner of a Type IV hydrogen storage cylinder according to claim 4, characterized in that: It also includes a second connecting ring (301) and a third connecting block (302); the air supply pipe (5) is provided with several protrusions (5002); the sleeve rod (4) is provided with several grooves (4003), and each protrusion (5002) is fitted into the adjacent groove (4003); the air supply pipe (5) is provided with a sliding groove (5003); several second connecting rings (301) are slidably connected to the sliding groove (5003); several third connecting blocks (302) are fixedly connected to each second connecting ring (301) by an elastic rope; several thin surfaces (6003) are provided inside the airbag (6), and each third connecting block (302) is fixedly connected to the adjacent thin surface (6003); the right end of the air supply pipe (5) is rotatably connected to the limiting plate (6002) of the airbag (6).

6. The method and equipment for applying a hydrogen permeation-resistant coating to the plastic inner liner of a Type IV hydrogen storage cylinder according to claim 5, characterized in that: Each second connecting ring (301) is configured as an I-shaped ring.

7. The method and equipment for applying a hydrogen permeation-resistant coating to the plastic inner liner of a Type IV hydrogen storage cylinder according to claim 1, characterized in that: It also includes a suction pipe (401); a suction pipe (401) for improving the debris cleaning effect is fixedly connected to the first fixed block (3), the suction pipe (401) is connected to an external pump, and the suction pipe (401) is connected to the receiving cavity (3002).

8. The method and equipment for applying a hydrogen permeation-resistant coating to the plastic inner liner of a Type IV hydrogen storage cylinder according to claim 7, characterized in that: It also includes a storage box (402); the first fixing block (3) is rotatably connected to a storage box (402) for collecting excess paint, and the storage box (402) is connected to an external paint collection device; both the first fixing block (3) and the storage box (402) are provided with several interconnecting holes in opposite positions.

9. The method and equipment for applying a hydrogen permeation-resistant coating to the plastic inner liner of a Type IV hydrogen storage cylinder according to claim 8, characterized in that: The storage box (402) and the first fixing block (3) are configured as a damped rotational connection.

10. The method and equipment for applying a hydrogen permeation-resistant coating to the plastic inner liner of a Type IV hydrogen storage cylinder according to claim 1, characterized in that: The first fixing block (3) has a rubber layer at the contact point with the inner liner (7) for sealing the bottle mouth of the inner liner (7).

Images