A Surface Treatment Device and Usage Method for the Plastic Inner Liner of a Type-IV Gas Cylinder

Abstract

The present invention discloses a surface treatment device and a usage method for the plastic inner liner of a type-IV gas cylinder, which comprise: a driving device, a flame treatment device and a resin coating device. The driving device includes a station conversion component and a tooling component. The tooling component includes two tooling parts, and the tooling parts are used for horizontally clamping the inner liner. The tooling component is provided with a rotating mechanism for driving the inner liner to rotate. The station conversion component drives the two tooling parts to synchronously rotate around the vertical axis between the two, so that the tooling parts have a flame treatment position and a resin coating position which are oppositely arranged. The flame treatment device includes a flame processor located at the flame treatment position, and the resin coating device includes a resin tank and a coating mechanism located at the bottom of the resin coating position. The process cost is low, which avoids the high equipment and consumable costs brought by surface treatment. The operation is simple, the production efficiency is high, the flame treatment and the surface protection of the inner liner can be carried out simultaneously, and it meets the requirements of rapid industrial production and management.

Description

Technical Field

[0001] The invention relates to the technical field of product manufacturing, and in particular to a surface treatment device for a plastic liner of a type IV gas cylinder and a use method thereof. Background Art

[0002] Hydrogen fuel cell vehicles have the advantages of zero emissions, high energy density, long driving range, and short hydrogen refueling time, and have attracted the attention of the new energy vehicle industry at home and abroad. Hydrogen energy vehicles use high-pressure hydrogen storage cylinders to store hydrogen. Currently, the pressure of hydrogen storage cylinders for hydrogen energy vehicles mainly includes 35MPa and 70MPa. Common metal hydrogen storage cylinder materials include aluminum alloy, titanium alloy, magnesium alloy and steel. However, metal hydrogen storage cylinders have cost issues, hydrogen embrittlement and hydrogen leakage, which can easily lead to hydrogen leakage and safety risks. Therefore, in recent years, some manufacturers have begun to develop hydrogen storage cylinders with polymer liners. The selection of polymer materials for cylinder liners should comprehensively consider issues such as hydrogen permeation, fatigue, strength, and use environment. Currently, the commonly used cylinder liners are HDPE and PA.

[0003] HDPE and PA that have not been surface treated have relatively low surface energy due to the molecular weight, molecular arrangement, polarity and crystallinity of the material itself, and have low interaction ability with the surrounding environment. Therefore, the bonding performance with the resin is generally not strong. After fiber winding and curing, the polymer liner and the winding layer are prone to stratification. This stratification defect will affect the overall quality of the hydrogen storage cylinder and pose a hidden danger to safe use. Surface treatment of the cylinder liner can effectively improve the adhesion of the cylinder liner material, thereby improving the overall quality of the fully wrapped hydrogen storage cylinder.

[0004] The existing technology generally uses flame treatment technology. Since the temperature of the flame is generally around 1200°C, it can break the chemical bonds of most polymers and introduce new or increase the content of existing oxygen-containing polar groups through violent oxidation reactions. These effects of flame treatment on the polymer liner help to improve the adhesion between the liner surface and the epoxy resin. Although the flame treatment has a long time effect and the modification effect is stable, in actual production, in order to avoid secondary pollution and wear, it is necessary to carry out winding and curing as soon as possible or coat the cylinder surface with winding resin and cure it. The existing flame treatment and resin coating winding processes are difficult to carry out synchronously, the processing efficiency is low, and the flame treatment effects at various places on the liner surface are inconsistent. Summary of the invention

[0005] The purpose of the present invention is to provide a surface treatment device and a method for using the plastic liner of a Type IV gas cylinder to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0006] The technical solutions adopted to solve the above technical problems are:

[0007] First, the present invention provides a surface treatment device for a plastic liner of a type IV gas cylinder, which comprises: a driving device, a flame treatment device and a resin coating device. The driving device comprises a station conversion component and a tooling component. The tooling component comprises two tooling parts which are arranged oppositely in a transverse direction. The tooling parts are used to clamp the liner in a transverse direction. The tooling component is provided with a rotating mechanism for driving the liner to rotate. The station conversion component drives the two tooling parts to rotate synchronously around a vertical axis therebetween, so that the tooling parts have a flame treatment position and a resin coating position which are arranged oppositely. The flame treatment device comprises a flame processor located at the flame treatment position, and the spraying direction of the flame processor is toward the outer periphery of the liner. The resin coating device comprises a resin tank located at the bottom of the resin coating position, and a coating mechanism located at the resin coating position and capable of controlling the distance between the resin tank and the outer periphery of the liner.

[0008] The beneficial effects of the surface treatment device for the plastic liner of type IV gas cylinders are as follows: when in use, the liner is clamped on the tooling part laterally, and the two tooling parts are synchronously driven to rotate around the vertical axis by the workstation conversion assembly, so that the two tooling parts can be rotated to the flame treatment position and the resin coating position respectively, and the flame treatment device at the flame treatment position performs flame treatment on the outer periphery of the liner, while the resin tank at the resin coating position performs resin coating on the outer periphery of the liner, so that the resin coating and the flame treatment can be performed synchronously, and during operation, the flame-treated liner is directly rotated to the resin coating position, and the coated liner is taken out Next, reinstall the new liner for flame treatment, thereby quickly realizing the processing link from flame treatment to resin coating to avoid secondary pollution and wear. When the liner is flame treated in the flame treatment position, the rotating mechanism drives the liner to rotate around its own axis, and cooperates with the flame processor to perform all-round flame treatment on the surface of the liner. When the liner is resin coated in the resin coating position, the rotating mechanism drives the liner to rotate around its own axis, and the resin in the resin tank is evenly coated on the surface of the liner. The resin thickness is controlled by adjusting the distance between the coating mechanism and the surface of the liner, and the excess resin falls back into the resin tank below.

[0009] As a further improvement of the above technical solution, the tooling part includes a chuck transmission-connected to the rotating mechanism and a tooling shaft with one end laterally detachably connected to the chuck.

[0010] In this solution, the inner liner is loaded through a tooling shaft, which is screwed into the thread at the head or tail end of the polymer inner liner to be processed, and one end of the tooling shaft is clamped by a chuck to provide support and rotation for the inner liner.

[0011] As a further improvement of the above technical solution, the rotating mechanism is transmission-connected to the chuck.

[0012] In the present solution, the rotation mechanism drives the inner tank to rotate by driving the chuck to rotate. The rotation mechanism may include two motors. The spindle ends of the two motors are respectively connected to the cylindrical or short conical structure on the back of the chuck through flanges. Through the flanges, the motors drive the chuck to rotate, thereby driving the tooling shaft and the inner tank to rotate. In this way, the control of individual rotation speeds can be achieved to meet the processing requirements of flame treatment and resin coating.

[0013] As a further improvement of the above technical solution, the station conversion assembly includes a rotating base and a rotation driving member for driving the rotating base to rotate around the vertical axis, and the tooling part is installed on the rotating base.

[0014] In this solution, the rotation driving member drives the rotating base to rotate, and the rotating base can drive the two tooling parts installed thereon to rotate.

[0015] As a further improvement of the above technical solution, the flame processor includes a horizontally arranged guide rail frame and a plurality of flame nozzles that are horizontally adjustable on the guide rail frame, and the orientation of the flame nozzles is adjustable.

[0016] In this solution, according to the length of the inner tank, the position of the flame nozzles on the guide rail frame and the orientation of the flame nozzles can be adjusted, so that the flame acts on the inner tank evenly in all directions.

[0017] As a further improvement of the above technical solution, the flame treatment device further includes a fire and wind shield arranged on the opposite side of the flame processor. The fire and wind shield is used to prevent the instability of the flame caused by air flow and to limit the range of the flame heat flow.

[0018] As a further improvement of the above technical solution, the resin tank is connected with a first lifting assembly for adjusting the height of the resin tank. The first lifting assembly is used to drive the resin tank to lift and control the contact area between the resin liquid surface in the resin tank and the inner tank.

[0019] As a further improvement of the above technical solution, the coating mechanism uses a telescopic brush. In this solution, the resin thickness can be directly controlled by controlling the distance between the telescopic brush and the surface of the inner tank. The excessive resin is brushed off by the brush and drips into the resin tank below.

[0020] As a further improvement of the above technical solution, the resin tank is provided with a heating element. Before coating, the resin in the resin tank is heated by the heating element so that the resin has good fluidity but does not solidify.

[0021] In addition, the present invention also provides a usage method for the surface treatment device of the type-IV gas cylinder plastic inner tank applicable to the above, and the specific steps are as follows:

[0022] S1. Horizontally clamp the inner tank to be processed on the tooling part in the flame treatment position;

[0023] S2. The rotating mechanism drives the inner tank to rotate self - sufficiently, and at the same time, the flame processor performs flame treatment on the outer periphery of the inner tank;

[0024] S3. After the flame treatment is completed, the station conversion component drives the two tooling parts to rotate synchronously, so that the inner tank after flame treatment rotates to the resin coating position, while the other tooling part rotates to the flame treatment position;

[0025] S4. Clamp a new inner tank to be processed on the other tooling part, perform S2. At the same time, the inner tank after flame treatment rotates self - sufficiently in the resin tank for resin coating, and adjust the distance between the coating mechanism and the outer periphery of the inner tank to control the thickness of the resin;

[0026] S5. Remove the inner tank coated with resin;

[0027] S6. Repeat the above S3 to S5.

[0028] The beneficial effects of the present invention are as follows: (1) Good process stability, which can ensure that the flame treatment effects on various parts of the plastic inner tank surface are at the same level and can be maintained for a long time.

[0029] (2) Low process cost, avoiding high equipment and consumable costs brought by surface treatment.

[0030] (3) Simple operation and high production efficiency. Flame treatment and inner tank surface protection can be carried out simultaneously, meeting the needs of rapid industrial production and management.

[0031] (4) Strong applicability. The inner tanks to be processed can be used in dry - winding, wet - winding and semi - dry - winding processes.

[0032] (5) Environment - friendly process, hardly causing harm to the environment and operators. Description of the Drawings

[0033] The following further describes the present invention with reference to the drawings and embodiments;

[0034] Figure 1 It is the front view of the surface treatment device for the plastic inner tank of the type - Ⅳ gas cylinder provided by the present invention, showing one embodiment;

[0035] Figure 2 It is the top view of the surface treatment device for the plastic inner tank of the type - Ⅳ gas cylinder provided by the present invention when the inner tank is undergoing flame treatment, showing one embodiment;

[0036] Figure 3 It is the top view of the surface treatment device for the plastic inner tank of the type - Ⅳ gas cylinder provided by the present invention when the inner tank after flame treatment is transferred to the resin coating position, showing one embodiment;

[0037] Figure 4It is a surface treatment device for the plastic inner liner of a type-IV gas cylinder provided by the present invention. The following is a top view when flame treatment and resin coating are simultaneously carried out on two inner liners in one embodiment. Detailed implementation manners

[0038] This part will describe the specific embodiments of the present invention in detail. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention. However, it should not be construed as a limitation on the protection scope of the present invention.

[0039] In the description of the present invention, it should be understood that for orientation descriptions, such as the orientations or positional relationships indicated by up, down, front, back, left, right, etc., are based on the orientations or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present invention.

[0040] In the description of the present invention, if there are descriptions with words such as "several", its meaning is one or more, and the meaning of multiple is more than two. Understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number.

[0041] In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0042] Refer to Figures 1 to 4 , the following embodiments are made for the surface treatment device of the plastic inner liner of the type-IV gas cylinder of the present invention:

[0043] The surface treatment device of the plastic inner liner of the type-IV gas cylinder in this embodiment includes a driving device 100, a flame treatment device, and a resin coating device.

[0044] Among them, the driving device 100 includes a station conversion component 110 and a tooling component. The tooling component in this embodiment includes two tooling parts, and the two tooling parts are arranged oppositely in the horizontal direction. As Figure 1 shown, the two tooling parts are respectively arranged facing left and right. The tooling part is used to horizontally clamp the inner liner. Specifically: the tooling part in this embodiment includes a chuck 140 and a tooling shaft 150. The chuck 140 faces outward, and the axis of the chuck 140 extends horizontally. The two chucks 140 are coaxially arranged. In this embodiment, a three-jaw chuck 140 is adopted. When in use, the tooling shaft 150 is screwed into the head or tail of the inner liner and the head inner thread, and then one end of the tooling shaft 150 is clamped on the chuck 140.

[0045] In other embodiments, the tooling part can adopt other structures to clamp the inner liner so that the surface of the inner liner is exposed. In this embodiment, a tooling shaft 150 is adopted, mainly for the inner liner with heads at both ends.

[0046] Clamping one end of the tooling shaft 150 by the chuck 140 can provide support and rotation for the inner liner.

[0047] The tooling component of this embodiment is also provided with a rotating mechanism 160, and the rotating mechanism 160 is used to drive the inner liner on the tooling part to rotate self - sufficiently. Specifically: the rotating mechanism 160 of this embodiment is in transmission connection with the chuck 140, and the rotating mechanism 160 drives the inner liner to rotate self - sufficiently by driving the chuck 140 to rotate. Among them, the rotating mechanism 160 can include two motors, and the main shaft ends of the two motors are respectively connected to the cylindrical or short - conical structure on the back of the chuck 140 through flanges. Through the flanges, the motors drive the chuck 140 to rotate, driving the tooling shaft 150 and the inner liner to rotate. In this way, the control of the individual rotation speed can be realized to meet the processing requirements of flame treatment and resin coating.

[0048] The station conversion component 110 drives the above - mentioned two tooling parts to rotate synchronously around the vertical axis between the two, so that the tooling part has a flame treatment position 120 and a resin coating position 130 on the rotation track. As Figure 1 shown, the flame treatment position 120 and the resin coating position 130 are arranged left and right.

[0049] The station conversion component 110 of this embodiment includes a rotating base 111 and a rotation driving part 112. Among them, the rotation driving part 112 drives the rotating base 111 to rotate around the vertical axis. The rotating mechanism 160 is installed on the top of the rotating base 111, and the rotation driving part 112 can adopt a servo motor. In this embodiment, the rotation driving part 112 drives the rotating base 111 to rotate, and the rotating base 111 can drive the two tooling parts installed thereon to rotate.

[0050] The flame treatment device is arranged at the flame treatment position 120. The flame treatment device includes a flame processor 200 arranged at the flame treatment position 120. The spraying direction of the flame processor 200 is set to face the outer circumference of the inner liner. The flame processor 200 of this embodiment includes a guide rail frame 210 and a plurality of flame nozzles 220. The guide rail frame 210 is arranged horizontally, and the plurality of flame nozzles 220 are horizontally adjustable and installed on the guide rail frame 210. And the orientation of the flame nozzles 220 is adjustable. The installation structure with adjustable orientation of the flame nozzles 220 is prior art and will not be elaborated here. According to the length of the inner liner, the position of the flame nozzles 220 on the guide rail frame 210 and the orientation of the flame nozzles 220 can be adjusted so that the flame acts on the inner liner evenly in all directions.

[0051] When in use, the gas bottle is connected to the flame nozzle 220 through a gas pipe. The flame treatment gas in this embodiment is butane. The gas flow rate of each flame nozzle 220 is 3L / min, and the flame just touches the surface of the inner tank. The flame treatment time for the same area is 4s to 5s.

[0052] Furthermore, if Figure 1 and Figure 2 As shown, the flame treatment device also includes a fireproof and windproof plate 230 arranged on the opposite side of the flame processor 200. The fireproof and windproof plate 230 is used to prevent air flow from causing flame instability and to limit the range of flame heat flow. That is to say, the flame processor 200 and the fireproof and windproof plate 230 are arranged relative to each other front and back. In order not to hinder the transfer of the inner liner, the flame processor 200 in this embodiment is connected to a second lifting assembly, and the second lifting assembly can drive the guide frame 210 to move up and down. When the inner liner in the flame treatment position 120 needs to be transferred to the resin coating position 130, the second lifting assembly drives the guide frame 210 to move downward to make room for the transfer of the inner liner. After the transfer, the second lifting assembly drives the guide frame 210 to move upward to its original position.

[0053] The resin coating device includes a resin tank 300 and a coating mechanism 400 arranged at the bottom of the resin coating position 130. The coating mechanism 400 is arranged on the outer peripheral side of the inner tank on the resin coating position 130. The distance between the coating mechanism 400 and the outer periphery of the inner tank is adjustable. When in use, resin is poured into the resin tank 300 in advance, and the coating mechanism 400 is used to scrape the resin on the outer periphery of the inner tank to control the resin thickness on the outer periphery of the inner tank.

[0054] The coating mechanism 400 of this embodiment is a telescopic brush, which includes a laterally extending brush and a telescopic rod that drives the brush to move forward and backward. The fixed end of the telescopic rod is fixed on the frame. The resin thickness can be directly controlled by controlling the distance between the telescopic brush and the surface of the inner tank. Excess resin is brushed off by the brush and drips into the resin tank 300 below. The resin coating thickness is 0.2mm to 0.3mm.

[0055] Furthermore, the resin tank 300 is equipped with a heating element, and the resin in the resin tank 300 is heated by the heating element before glue coating, so that the resin has better fluidity but is not solidified.

[0056] In addition, the resin tank 300 is connected to a first lifting assembly 310 for adjusting the height of the resin tank 300 . The first lifting assembly 310 is used to drive the resin tank 300 to move up and down to control the contact area between the resin liquid level in the resin tank 300 and the inner tank.

[0057] The first lifting assembly 310 and the second lifting assembly can both adopt telescopic motors, or lifting drive structures such as electric push rods and hydraulic cylinders.

[0058] The resin coated in this embodiment is the same epoxy resin system used for winding. If it is not the resin of the same brand, it is necessary to ensure that the glass transition temperature Tg of the coated resin is lower than or close to the Tg of the epoxy resin system used for fiber winding, and to ensure the consistency of the curing shrinkage rate and the coefficient of thermal expansion.

[0059] The thickness of the coated resin is jointly determined by the contact area between the inner liner and the resin in the resin tank 300, the rotation speed of the inner liner, and the gap between the telescopic brush and the inner liner.

[0060] After the rotation speed of the chuck 140 and the temperature of the resin tank 300 are determined, the thickness of the coated resin is controlled by the area of contact between the resin liquid surface in the resin tank 300 and the inner liner and the distance between the telescopic brush and the inner liner surface.

[0061] The beneficial effects of this technology are as follows:

[0062] (1) Good process stability, which can ensure that the flame treatment effects at all parts of the plastic inner liner surface are at the same level and can be maintained for a long time.

[0063] (2) Low process cost, avoiding the high equipment and consumable costs brought by surface treatment.

[0064] (3) Simple operation and high production efficiency. Flame treatment and inner liner surface protection can be carried out simultaneously, meeting the needs of rapid industrial production and management.

[0065] (4) Strong applicability. The inner liner to be treated can be used in dry winding, wet winding, and semi-dry winding processes.

[0066] (5) Environmentally friendly process, hardly causing harm to the environment and operators.

[0067] This embodiment also provides a usage method for the surface treatment device of the type-IV gas cylinder plastic inner liner applicable to the above, and the specific method steps are as follows:

[0068] S1. Screw the tooling shaft 150 into the thread at the head or tail end of the polymer inner liner to be treated, and clamp one end of the tooling shaft 150 by the chuck 140 located at the flame treatment position 120.

[0069] S2. The rotation mechanism 160 drives the chuck 140 and the tooling shaft 150 to rotate, so as to drive the inner liner to rotate at a constant speed, and cooperate with the flame sprayed by the flame processor 200 to perform flame treatment on the surface of the inner liner.

[0070] S3. After the flame treatment is completed, start the station conversion component 110, drive the two tooling parts to rotate synchronously, so that the inner liner that has undergone flame treatment rotates to the resin coating position 130, and the other tooling part rotates to the flame treatment position 120.

[0071] S4. At this time, the new inner liner and the tooling shaft 150 can be screwed into each other and clamped in the chuck 140 at the flame treatment position 120 for flame treatment. Meanwhile, the inner liner in the resin coating position rotates self-driven by the rotating mechanism 160 in the resin tank 300 for resin coating. Before coating, the temperature is increased through the control system so that the resin has good fluidity but does not solidify. During coating, the height of the resin tank 300 is adjusted through the control system so that the resin liquid level in the resin tank 300 contacts the inner liner. The inner liner is driven by the chuck 140 to rotate to evenly coat the resin on the surface of the inner liner. The distance between the telescopic brush and the surface of the inner liner can directly control the resin thickness, and the excessive resin is brushed off by the brush and drips into the resin tank 300 below;

[0072] S5. Remove the coated inner liner;

[0073] S6. Repeat the above steps S3 to S5.

[0074] This embodiment also provides a specific processing technology for the gas cylinder inner liner, and the specific process is as follows:

[0075] Screw the tooling shaft 150 into the thread of one of the two end heads of the plastic inner liner, then insert the tooling shaft 150 into the chuck 140 at the flame treatment position 120, and tighten the chuck 140 to fix the gas cylinder;

[0076] Start the rotating mechanism 160 so that the chuck 140 drives the tooling shaft 150 and then drives the inner liner to rotate, and the rotation speed is controlled at 12 - 15 r / min. Open the gas cylinder valve, adjust the nozzle flow rate to 3 L / min, start the flame processor 200, adjust the flame position so that the middle flame of the flame just contacts the surface of the inner liner, and make the flame act evenly on the surface of the inner liner through the rotational movement of the gas cylinder inner liner. Each gas cylinder inner liner can be evenly treated by the flame in all directions for three circles.

[0077] The number and orientation angle of the flame nozzles 220 can be adjusted according to the sizes of gas cylinders with different volumes to determine the acting area of each flame nozzle 220, and ensure that the acting areas of the flame nozzles 220 just meet but do not overlap.

[0078] After the flame treatment is completed, start the station conversion component 110 to move the inner liner to the resin coating position 130. At this time, a new gas cylinder inner liner and the tooling shaft 150 can be screwed into the chuck 140 at the flame treatment position 120 for flame treatment;

[0079] Start the rotating mechanism 160 so that the chuck 140 at the resin coating position 130 drives the tooling shaft 150 and then drives the inner liner to rotate, and the rotation speed is controlled at 6 r / min. Adjust the distance between the telescopic brush and the inner liner so that it just contacts the surface of the inner liner;

[0080] The coated resin is the same type of resin used for winding. The heating temperature of the resin tank 300 is set at 60°C according to the resin properties, so that the resin has good fluidity and is not easily cured in a short time.

[0081] An optional resin formula is EpoTech4251A4 / B2 = 100 / 90, and the mass ratio of resin to curing agent is 100:90. After mixing the resin and the curing agent evenly, pour them into the resin tank 300. Adjust the height of the resin tank 300 so that the resin in the resin tank 300 can contact the inner liner surface. As the inner liner rotates, the resin in the resin tank 300 is smeared on the entire outer surface of the inner liner. As the resin flows, the barrel shoulder will also be smeared. The telescopic brush can control the thickness of the resin to a certain extent and block the excess resin to make it drip back into the lower resin tank 300.

[0082] The thickness of the resin is mainly controlled by the rotation speed of the chuck 140 at the resin coating position 130, the depth of contact between the inner liner and the resin, and the distance between the telescopic brush and the inner liner. In this case, the resin thickness is controlled within 0.1 - 0.2 mm, and different resin thicknesses can be controlled by adjusting the combination of the three according to requirements.

[0083] After the inner liner is evenly coated with resin, lower the height of the resin tank 300 to separate the inner liner from the resin in the resin tank 300, and retract the telescopic brush. As the rotation proceeds, the resin is further evenly distributed on the surface of the inner liner, and the excess resin drips back into the resin tank 300. After stabilization, turn off the chuck 140 at the resin coating position 130 and remove the tooling shaft 150;

[0084] Move the inner liner that has been flame-treated and completely coated with resin to the chuck in the curing furnace. The rotation speed of the chuck in the curing chamber shall not be lower than 6 r / min when coating the resin. The resin coated on the outer surface of the inner liner can be cured in 5 hours at 100°C. The inner liner can also be rotated continuously at the resin coating position 130 or other rotating equipment. After the temperature drops, the resin viscosity increases. After gelation, the motor can be turned off, and the inner liner can be removed and placed on the shelf. Thus, the flame treatment on the surface of a type-IV hydrogen storage cylinder inner liner is completed.

[0085] After using this device, it can ensure that the surface energy of the plastic inner liner can maintain a uniform and obvious treatment effect for a long time. At the same time, it improves work efficiency, can perform flame treatment and resin coating simultaneously, reduces production costs, avoids health damage to operators, and meets the needs of industrial large-scale high-efficiency production.

[0086] The above has specifically described the preferred embodiments of the present invention. However, the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A surface treatment device for the plastic inner liner of a type-IV gas cylinder, characterized in that: It includes: A driving device (100) comprising a workstation conversion assembly (110) and a tooling assembly, wherein the tooling assembly comprises two tooling parts that are disposed in opposite directions in a transverse direction, the tooling parts being used to clamp an inner liner in a transverse direction, the tooling assembly being provided with a rotating mechanism (160) for driving the inner liner to rotate, the workstation conversion assembly (110) driving the two tooling parts to rotate synchronously around a vertical axis therebetween, so that the tooling parts have a flame treatment position (120) and a resin coating position (130) that are disposed in opposite directions; A flame processing device, comprising a flame processor (200) located at the flame processing position (120), wherein the spraying direction of the flame processor (200) is toward the outer periphery of the inner container; A resin coating device, comprising a resin tank (300) located at the bottom of the resin coating position (130), and a coating mechanism (400) located at the resin coating position (130) and capable of controlling the distance between the coating mechanism and the outer periphery of the inner container; The tooling part comprises a chuck (140) drivingly connected to the rotating mechanism (160), and a tooling shaft (150) having one end laterally detachably connected to the chuck (140); The rotating mechanism (160) is transmission-connected to the chuck (140); The workstation conversion assembly (110) comprises a rotating seat (111) and a rotating driving member (112) for driving the rotating seat (111) to rotate around the vertical axis, and the tooling portion is mounted on the rotating seat (111); The flame processor (200) comprises a transversely arranged guide rail frame (210), and a plurality of flame spray heads (220) transversely adjustably arranged on the guide rail frame (210), wherein the flame spray heads (220) are arranged in an adjustable direction.

2. A surface treatment device for a plastic liner of a Type IV gas cylinder according to claim 1, characterized in that: The flame processing device further comprises a fire and wind shielding plate (230) arranged on the opposite side of the flame processor (200).

3. A surface treatment device for a plastic liner of a Type IV gas cylinder according to claim 1, characterized in that: The resin tank (300) is connected to a first lifting assembly (310) for adjusting the height of the resin tank (300).

4. A surface treatment device for a plastic liner of a Type IV gas cylinder according to claim 1, characterized in that: The coating mechanism (400) adopts a telescopic brush.

5. A surface treatment device for a plastic liner of a Type IV gas cylinder according to claim 1, characterized in that: The resin tank (300) is provided with a heating element.

6. A method for using a surface treatment device for the plastic inner liner of a type-IV gas cylinder as described in any one of claims 1 to 5, characterized in that: The specific steps are as follows: S1, clamping the inner container to be processed transversely on the tooling part located at the flame processing position (120); S2, the rotating mechanism (160) drives the inner container to rotate, and at the same time the flame processor (200) performs flame processing on the outer periphery of the inner container; S3, after the flame treatment is completed, the station conversion assembly (110) drives the two tooling parts to rotate synchronously, so that the inner liner after the flame treatment is rotated to the resin coating position (130), and the other tooling part is rotated to the flame treatment position (120); S4. Clamp the new inner container to be processed on another tooling part, and perform S2. At the same time, the inner container after flame treatment rotates in the resin tank (300) for resin coating, and adjust the distance between the coating mechanism (400) and the outer periphery of the inner container to control the thickness of the resin; S5. Remove the inner container coated with resin; S6. Repeat the above S3 to S5.

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