Automatic gluing device and method for plastic inner container and valve seat of IV-type hydrogen storage bottle

Abstract

The invention belongs to the technical field of hydrogen storage cylinder inner container forming, and aims to solve the problem that a perfect plastic inner container and metal valve seat cementing process is lacked at present. According to the automatic gluing device and method for the plastic inner container and the valve seat of the IV-type hydrogen storage bottle, uniform and efficient gluing is achieved through the adjustable gluing mechanism, the inner container is automatically aligned and effectively supported and fixed through the inner container supporting and rotating mechanism, and subsequent gluing and assembling work is facilitated; the valve seat connecting and pressing mechanism can achieve installation of the metal valve seat, under the cooperation of the whole machine frame and the guide column, assembly of the metal valve seat and the plastic inner container is achieved, constant and even pressure can be applied to the metal valve seat obtained after glue joint is completed in the circumferential direction, and glue is naturally solidified in the pressure maintaining environment. The gluing device can meet the gluing requirement of a complex connecting structure, can achieve efficient bonding of the plastic inner container and the metal valve seat, and has the advantages of being good in centering performance, high in integration degree and complete in function.

Description

Technical Field

[0001] The present invention belongs to the technical field of the inner liner forming of hydrogen storage cylinders, and particularly relates to an automatic glue coating device and method for a plastic inner liner and a valve seat of a type-IV hydrogen storage cylinder. Background Art

[0002] At present, the on-vehicle hydrogen storage technologies of hydrogen fuel cell vehicles mainly include high-pressure gaseous hydrogen storage, cryogenic liquid hydrogen storage, high-pressure cryogenic liquid hydrogen storage, metal hydride hydrogen storage, and organic liquid hydrogen storage. The type-IV plastic inner liner hydrogen storage cylinder has become the best choice for high-pressure on-vehicle hydrogen storage technology due to its advantages such as high hydrogen storage density, good fatigue characteristics, and low cost. The on-vehicle type-IV hydrogen storage cylinder refers to a refillable gas cylinder with a rated working pressure ≤ 70 MPa, a rated working temperature not lower than -40 °C and not higher than 85 °C, with a plastic inner liner as the inner liner of the high-pressure hydrogen storage container, and the outer layer is wound and coated with carbon fiber and fixed on a road vehicle as a fuel tank.

[0003] The forming process of the type-IV hydrogen storage cylinder is mainly divided into two major processes: inner liner forming and winding forming. During the inner liner forming process, the injection molding and welding split-type formed products have high precision, stable dimensions, excellent mechanical properties, are suitable for the forming of various bottle valve seat structures, and can be designed with a separate sealing structure. The injection molding of the inner liner is divided into integral injection molding of the inner liner and the valve seat and split injection molding. The process of the split injection molding process of the inner liner and the valve seat is: injection molding the inner liner - gluing the valve seat - welding the inner liner.

[0004] The structure at the connection between the inner liner and the valve seat of the type-IV hydrogen storage cylinder can be designed diversely to adapt to different plastic inner liner sizes. The connection structure is relatively complex, and in the gluing process, it is necessary to ensure the centering of the valve seat and the inner liner, uniform application of the glue layer, uniform curing, and high bonding efficiency, which poses a great challenge to the gluing process. Therefore, developing an automatic glue coating device for the plastic inner liner and the valve seat of the type-IV hydrogen storage cylinder to achieve automatic and uniform glue coating, uniform pressing, and efficient bonding of the inner liner and the valve seat, and forming a complete gluing method based on this equipment is of great significance for the forming of the type-IV hydrogen storage cylinder. Summary of the Invention

[0005] In order to solve at least one of the above technical problems existing in the prior art, the present invention provides an automatic glue coating device and method for a plastic inner liner and a valve seat of a type-IV hydrogen storage cylinder.

[0006] The present invention is implemented by the following technical solutions: An automatic glue - applying device for the plastic inner liner and valve seat of a type - IV hydrogen storage cylinder, comprising an integral frame, a movable platform, an inner - liner installation platform, a valve - seat connection and pressing mechanism, an inner - liner support and rotation mechanism, an adjustable glue - applying mechanism, and a glue storage tank; The movable platform is slidably connected to the upper inner side of the integral frame and can change its position through an electric cylinder. The valve - seat connection and pressing mechanism and the adjustable glue - applying mechanism are installed at the lower end of the movable platform; The valve - seat connection and pressing mechanism includes a valve - seat connection shaft and a valve - seat pressing mechanism. A vertical cylinder is connected to the upper end of the valve - seat connection shaft, and the vertical cylinder is used to drive the valve - seat connection and pressing mechanism to make an axial reciprocating motion; The lower end of the valve - seat connection shaft is used to connect a metal valve seat. The valve - seat connection shaft is installed on the pressing frame of the valve - seat pressing mechanism through a card strip, and there is an adjustment gap between the valve - seat connection shaft and the pressing frame. The valve - seat pressing mechanism is used to provide a pressing force towards the plastic inner - liner side for the metal valve seat; The inner - liner installation platform is fixedly arranged at the lower part of the integral frame, and the inner - liner support and rotation mechanism is installed on the inner - liner installation platform. The inner - liner support and rotation mechanism is used to support the plastic inner liner and drive the plastic inner liner to rotate; The adjustable glue - applying mechanism includes a glue - applying cylinder and an angle - adjusting mechanism. The angle - adjusting mechanism is used to adjust the orientation and position of the glue nozzle of the glue - applying cylinder to realize glue - applying at the connection between the metal valve seat and the plastic inner liner; The glue - inlet end of the glue - applying cylinder is connected to the glue storage tank through a glue - conveying pipeline, and the glue storage tank is installed at the lower part of the integral frame.

[0007] Preferably, the valve - seat pressing mechanism includes a pressing frame, pressing cylinders, pressing joints, and pressure sensors. Among them, multiple pressing cylinders are arranged at intervals and surrounded on the pressing frame. The pressing joints are installed at the lower ends of the pressing cylinders, and pressure sensors are arranged at the contact ends of the pressing joints with the metal valve seat.

[0008] Preferably, the upper end of the pressing frame has a hollow cylinder. The valve - seat connection shaft is movably inserted into the hollow cylinder. The side wall of the hollow cylinder has a limiting slot hole for cooperating with the card strip, and the hole height of the limiting slot hole is greater than the thickness of the card strip.

[0009] Preferably, the angle - adjusting mechanism includes a horizontal cylinder, a swing arm, and a swing motor. The number of angle - adjusting mechanisms is two groups. A cylinder mounting seat is installed at the lower end of the movable platform. The two groups of angle - adjusting mechanisms are symmetrically installed on both sides of the cylinder mounting seat. Among them, the bottom end of the cylinder of the horizontal cylinder is connected to the cylinder mounting seat, the top end of the cylinder of the horizontal cylinder is rotatably connected to the middle of the upper arm of the swing arm through a pin shaft. The upper end of the swing arm is rotatably connected to the movable platform through a pin shaft. The glue - applying cylinder is rotatably connected to the lower end of the swing arm through a swing motor, and a clamping part connected to the output end of the swing motor is arranged on the outer wall of the glue - applying cylinder.

[0010] Preferably, it further includes a glue discharging mechanism of the glue cartridge. The glue discharging mechanism includes a glue discharging motor, a glue cartridge support plate, a threaded rod, a glue discharging rod, a slider, and a slider-glue discharging rod connecting piece. The glue discharging motor is installed on the glue cartridge through the glue cartridge support plate. The output end of the glue discharging motor is connected with the threaded rod. The slider is slidably connected to the threaded rod, and the slider is connected to the end of the glue discharging rod through the slider-glue discharging rod connecting piece. The front pressing plate of the glue discharging rod is slidably arranged in the glue cartridge.

[0011] Preferably, the front end of the glue cartridge has a glue nozzle, and the glue nozzle is used to change the extrusion shape of the adhesive in the glue cartridge. The number of glue cartridges is two, and they are located on both sides of the metal valve seat. The shape of the glue nozzle of one glue cartridge is a hollow cylinder, and the shape of the glue nozzle of the other glue cartridge is flat and the outlet end is a long strip hole.

[0012] Preferably, the inner tank support and rotation mechanism includes a rotation mechanism and an inner tank support mechanism. The rotation mechanism includes a large slewing bearing, a rotation support frame, a rotation motor, and an inner tank tray. The rotation support frame is fixedly arranged at the lower end of the inner tank installation platform. The inner ring of the large slewing bearing is installed on the inner side of the rotation support frame, and the outer ring of the large slewing bearing is installed on the inner side of the rotation support frame. The inner ring of the large slewing bearing is bolted to the upper and lower parts of the inner tank tray. The inner tank support mechanism includes a driving large gear, a driving small gear, a support motor, a support housing, a support rotating shaft, a connecting rod, a support lever, and a connecting disc. The support housing is installed at the upper end of the lower part of the inner tank tray. The rotation motor is installed on the rotation support frame and the output end is connected to the bottom end of the support housing. The support rotating shaft is rotatably installed at the central position of the inner cavity of the support housing. The driving large gear and two connecting discs are key-connected to the support rotating shaft in sequence from bottom to top along the axial direction of the support rotating shaft. The support motor is installed at the lower end of the inner tank tray and the output end extends to the inner cavity of the support housing to be connected with the driving small gear. The driving small gear meshes with the driving large gear for transmission. At the position of the side wall of the support housing that is at the same height as the connecting disc, a plurality of notches are circumferentially spaced. A plurality of connecting rods are circumferentially spaced along the connecting disc and are rotatably connected to the connecting disc. One end of the connecting rod away from the connecting disc is hinged with a support lever. One support lever is rotatably connected at each notch of the support housing. The outer end of the support lever extends to the outside of the support housing to abut against the inner wall of the plastic inner tank.

[0013] Preferably, the whole machine frame, the movable platform, the inner tank installation platform, the valve seat connection and pressing mechanism, the inner tank support and rotation mechanism, and the adjustable glue discharging mechanism are all coaxially arranged. The movable platform is slidably connected to the slide rail inside the whole machine frame through a sliding block. A guiding column is arranged at the lower end of the movable platform, and the guiding column movably passes through the lower inner tank installation platform.

[0014] The present invention also provides an automatic glue coating method for the plastic inner tank and valve seat of a type-IV hydrogen storage bottle, including the following steps: S1: Set the plastic inner liner outside the support shell on the inner liner tray, and at the same time connect the metal valve seat to the lower end of the valve seat connecting shaft. S2: Operate the support motor to make the driving pinion drive the driving gear to rotate, thereby driving the support rotating shaft and the connecting disc connected thereto to rotate. The connecting disc drives the connecting rod and the support lever to act, so that the support lever supports the inner wall of the plastic inner liner and automatically centers the plastic inner liner. S3: Operate the electric cylinder to drive the movable platform to descend, and at the same time operate the vertical cylinder to drive the valve seat connection and pressing mechanism to descend to a preset position to avoid interference with the adjustable glue application mechanism. Operate the horizontal cylinder to adjust the swing arm to a preset position, and operate the swing motor to adjust the glue applicator to an angle suitable for glue discharge. S4: Operate the rotary motor to drive the large rotary bearing to rotate, thereby making the inner liner support mechanism and the plastic inner liner rotate synchronously. At the same time, operate the glue discharge motor to drive the glue discharge rod to act, so as to apply glue to the connection between the metal valve seat and the plastic inner liner. S5: After the glue application is completed, operate the vertical cylinder and the electric cylinder to drive the metal valve seat to continue to move downward, and at the same time operate the rotary motor to drive the plastic inner liner to rotate until the inner lining of the plastic inner liner and the toothed structure of the metal valve seat are aligned. After alignment, continue to operate the vertical cylinder to assemble the metal valve seat on the plastic inner liner. S6: Operate the pressing cylinder to drive the pressing joint to descend to 1 / 2 - 2 / 3 of the diameter of the metal valve seat, observe the values of the pressure sensors at the pressing joint, and make the values of multiple pressure sensors consistent. Cure the pressed metal valve seat and plastic inner liner at room temperature for a preset time. S7: After curing is completed, retract the pressing cylinder, operate the support motor to drive the support lever to retract, disconnect the connection between the metal valve seat and the valve seat connecting shaft, operate the electric cylinder to drive the valve seat connection and pressing mechanism to rise, and take out the bonded plastic inner liner and metal valve seat.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The automatic glue application and bonding device and method for the plastic inner liner and valve seat of the type-IV hydrogen storage bottle provided by the present invention design a general glue bonding device for the connection structures of inner liners and valve seats with different structural forms, overcome the influence of inner liner size and geometric factors, and can achieve uniform and efficient glue application through the adjustable glue application mechanism; the inner liner support mechanism can automatically align the center of the inner liner and effectively support and fix the inner liner, facilitating subsequent glue application and assembly work; the valve seat connection and pressing mechanism can realize the installation of the metal valve seat. With the cooperation of the whole machine frame and the guide columns, the assembly of the metal valve seat and the plastic inner liner can be realized and a constant and uniform pressure can be applied circumferentially to the glued metal valve seat, and it is naturally cured in a pressure-holding environment. This device can meet the glue application requirements of complex connection structures, can realize the high-efficiency bonding of the plastic inner liner and the metal valve seat, and has the advantages of good centering, high integration, and complete functions. Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 is the front view of the overall structure of the present invention; Figure 2 is the position schematic diagram of the overall structure during glue application of the present invention; Figure 3 is the position schematic diagram of the overall structure during curing of the present invention; Figure 4 is the side view of the adjustable glue application mechanism of the present invention; Figure 5 is the schematic diagram of the glue outlet mechanism of the present invention; Figure 6 is the cross-sectional view of the slewing mechanism of the present invention; Figure 7 is the top view of the inner tank support mechanism of the present invention; Figure 8 is the side view of the inner tank support mechanism of the present invention; Figure 9 is the schematic diagram of the valve seat connection and pressing mechanism of the present invention.

[0018] In the figures: 101 - integral machine frame; 102 - movable platform; 103 - inner tank installation platform; 104 - guide post; 201 - electric cylinder; 202 - vertical air cylinder; 301 - valve seat connection shaft; 302 - clamping strip; 303 - pressing frame; 304 - pressing air cylinder; 305 - pressing joint; 306 - pressure sensor; 307 - limit slot hole; 401 - glue application cylinder; 402 - horizontal air cylinder; 403 - swing arm; 404 - swing motor; 405 - air cylinder mounting seat; 5 - glue storage tank; 601 - glue outlet motor; 602 - glue cylinder support plate; 603 - threaded rod; 604 - glue application rod; 605 - slider; 606 - slider-glue application rod connecting piece; 701 - large slewing bearing; 702 - slewing support frame; 703 - slewing motor; 704 - inner tank tray; 705 - driving large gear; 706 - driving small gear; 707 - support housing; 708 - support rotating shaft; 709 - connecting rod; 710 - support lever; 711 - connecting disc; 712 - support motor; 8 - glue conveying pipeline; 9 - metal valve seat; 10 - plastic inner tank. Detailed Description of the Embodiments

[0019] In combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative work belong to the scope protected by the present invention.

[0020] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Therefore, they do not have technical substantial significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should fall within the scope that the technical content disclosed by the present invention can cover. It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0021] The present invention provides an embodiment: As Figures 1 to 9 shown, an automatic glue coating device for the plastic inner liner and valve seat of a type-IV hydrogen storage bottle includes an integral frame 101, a movable platform 102, an inner liner installation platform 103, a valve seat connection and pressing mechanism, an inner liner support and rotation mechanism, an adjustable glue application mechanism, and a glue storage tank 5; the movable platform 102 is slidably connected to the upper inner side of the integral frame 101 and can change its position through an electric cylinder 201, and the valve seat connection and pressing mechanism and the adjustable glue application mechanism are installed at the lower end of the movable platform 102; the integral frame 101, the movable platform 102, the inner liner installation platform 103, the valve seat connection and pressing mechanism, the inner liner support and rotation mechanism, and the adjustable glue application mechanism are all coaxially arranged; the movable platform 102 is slidably connected to the slide rail on the inner side of the integral frame 101 through a sliding block, and a guide post 104 is provided at the lower end of the movable platform 102, and the guide post 104 movably passes through the lower inner liner installation platform 103; The valve seat connection and pressing mechanism includes a valve seat connection shaft 301 and a valve seat pressing mechanism. The upper end of the valve seat connection shaft 301 is connected to a vertical cylinder 202, and the vertical cylinder 202 is used to drive the valve seat connection and pressing mechanism to perform axial reciprocating motion; the lower end of the valve seat connection shaft 301 is used to connect to the metal valve seat 9. The valve seat connection shaft 301 is installed on the pressing frame 303 of the valve seat pressing mechanism through a clamping strip 302, and there is an adjustment gap between the valve seat connection shaft 301 and the pressing frame 303. The valve seat pressing mechanism is used to provide a pressing force towards the plastic inner liner 10 on the side of the metal valve seat 9; the inner liner installation platform 103 is fixedly arranged at the lower part of the whole machine frame 101, and the inner liner support and rotation mechanism is installed on the inner liner installation platform 103. The inner liner support and rotation mechanism is used to support the plastic inner liner 10 and drive the plastic inner liner 10 to rotate; the adjustable glue application mechanism includes a glue application cylinder 401 and an angle adjustment mechanism. The angle adjustment mechanism is used to adjust the orientation and position of the glue nozzle of the glue application cylinder 401 to realize glue application at the connection between the metal valve seat 9 and the plastic inner liner 10; the glue inlet end of the glue application cylinder 401 is connected to the glue storage tank 5 through a glue conveying pipeline 8, and the glue storage tank 5 is installed at the lower part of the whole machine frame 101.

[0022] In this embodiment, the valve seat pressing mechanism includes a pressing frame 303, a pressing cylinder 304, a pressing joint 305 and a pressure sensor 306. Among them, multiple pressing cylinders 304 are arranged at intervals and surround the pressing frame 303. The pressing joint 305 is installed at the lower end of the pressing cylinder 304, and a pressure sensor 306 is arranged at the contact end of the pressing joint 305 and the metal valve seat 9. The upper end of the pressing frame 303 has a hollow cylinder, and the valve seat connection shaft 301 is movably inserted into the hollow cylinder. The side wall of the hollow cylinder has a limiting slot hole 307 that cooperates with the clamping strip 302, and the hole height of the limiting slot hole 307 is greater than the thickness of the clamping strip 302. The purpose of this design is to prevent interference of the overall structure and damage to rigidity caused by displacement of the adhesive due to extrusion during the pressing process. After the glue application operation is completed, under the drive of the vertical cylinder 202, the metal valve seat 9 and the valve seat connection and pressing mechanism will move downward as a whole to complete the assembly process of the metal valve seat 9 and the plastic inner liner 10. During the assembly stage, the upper end of the valve seat connection shaft 301 will reach the upper edge of the preset gap. When the pressing operation is performed, the adhesive will cause the metal valve seat 9 to drive the valve seat connection shaft 301 to move downward slightly by a certain distance due to extrusion. In order to ensure that the valve seat connection shaft 301 can smoothly complete this downward movement, this reserved stroke is added at the connection part.

[0023] The angle adjustment mechanism includes a horizontal cylinder 402, a swing arm 403 and a swing motor 404. The number of angle adjustment mechanisms is two groups. A cylinder mounting seat 405 is installed at the lower end of the movable platform 102. The two groups of angle adjustment mechanisms are symmetrically installed on both sides of the cylinder mounting seat 405. Among them, the bottom end of the cylinder of the horizontal cylinder 402 is connected to the cylinder mounting seat 405, and the top end of the cylinder of the horizontal cylinder 402 is rotationally connected to the middle of the upper arm of the swing arm 403 through a pin shaft. The upper end of the swing arm 403 is rotationally connected to the movable platform 102 through a pin shaft. The caulking gun 401 is rotationally connected to the lower end of the swing arm 403 through the swing motor 404. A clamping member connected to the output end of the swing motor 404 is provided on the outer wall of the caulking gun 401.

[0024] An adhesive dispensing mechanism is further provided on the caulking gun 401. The adhesive dispensing mechanism includes an adhesive dispensing motor 601, a cartridge support plate 602, a threaded rod 603, an adhesive dispensing rod 604, a slider 605 and a slider-adhesive dispensing rod connecting member 606. The adhesive dispensing motor 601 is installed on the caulking gun 401 through the cartridge support plate 602. The output end of the adhesive dispensing motor 601 is connected to the threaded rod 603. The slider 605 is slidably connected to the threaded rod 603 and the slider 605 is connected to the end of the adhesive dispensing rod 604 through the slider-adhesive dispensing rod connecting member 606. The front end pressing plate of the adhesive dispensing rod 604 is slidably arranged in the caulking gun 401.

[0025] The front end of the caulking cylinder 401 is provided with a caulking nozzle, which is used to change the extrusion shape of the adhesive in the caulking cylinder 401. The number of caulking cylinders 401 is two, and they are located on both sides of the metal valve seat 9. The shape of the caulking nozzle of one caulking cylinder 401 is a hollow cylinder, and the shape of the caulking nozzle of the other caulking cylinder 401 is flat with a long strip hole at the outlet end. According to the assembly characteristics of the plastic inner liner 10 and the metal valve seat 9, two types of caulking heads are designed to ensure the efficiency and accuracy of caulking, namely the hollow cylinder caulking nozzle and the flat caulking nozzle. In the caulking operation, the hollow cylinder caulking nozzle is specifically used to coat the toothed part in the assembly shape, while the flat caulking nozzle is responsible for caulking on the plane of the joint surface and also has a caulking scraping function, effectively preventing excessive accumulation of the adhesive. These toothed structures are evenly distributed on the circumference, with a total of 12. During the caulking process, the hollow cylinder caulking nozzle works in a jogging mode. A height sensor is installed on the hollow cylinder caulking nozzle. When the plastic inner liner 10 rotates, and the height sensor detects that the height is lower than the original height of the plastic inner liner 10, it indicates that the toothed part has been reached. At this time, the hollow cylinder caulking nozzle starts to be controlled to caulk. As the plastic inner liner 10 rotates one circle, the hollow cylinder caulking nozzle will continuously dot the glue 12 times, and each dotting is aimed at one toothed structure. At the same time, the flat caulking nozzle continuously performs the caulking operation at a height of 5 mm from the joint surface, and the length of each caulking is 30 mm. When the plastic inner liner 10 rotates one circle, the flat caulking nozzle feeds 30 mm in the direction of the center of the circle to cover the adhesive in the inner circle. The caulking operation of the toothed part can be completed in one circle, while the plane part needs to be caulked 3 to 4 circles to achieve the expected effect. The entire caulking process is completed after the plastic inner liner 10 rotates 3 to 4 circles, and then the caulking cylinder 401 is immediately reset to the initial position.

[0026] The inner liner support slewing mechanism includes a slewing mechanism and an inner liner support mechanism. The slewing mechanism includes a large slewing bearing 701, a slewing support frame 702, a slewing motor 703, and an inner liner tray 704. The slewing support frame 702 is fixedly arranged at the lower end of the inner liner installation platform 103. The outer ring of the large slewing bearing 701 is installed inside the slewing support frame 702, and the inner ring of the large slewing bearing 701 is bolted to the upper and lower parts of the inner liner tray 704. The inner tank support mechanism includes a driving large gear 705, a driving small gear 706, a support housing 707, a support rotating shaft 708, a connecting rod 709, a support lever 710, a connecting disc 711 and a support motor 712. The support housing 707 is installed at the upper end of the lower part of the inner tank tray 704. The rotary motor 703 is installed on the rotary support frame 702 and its output end is connected to the bottom end of the support housing 707. The support rotating shaft 708 is rotatably installed at the central position of the inner cavity of the support housing 707. The driving large gear 705 and two connecting discs 711 are key-connected to the support rotating shaft 708 in sequence from bottom to top along the axial direction of the support rotating shaft 708. The support motor 712 is installed at the lower end of the inner tank tray 704 and its output end extends to the inner cavity of the support housing 707 to be connected to the driving small gear 706. The driving small gear 706 meshes with the driving large gear 705 for transmission. At positions on the side wall of the support housing 707 that are at the same height as the connecting disc 711, a plurality of notches are circumferentially spaced. A plurality of connecting rods 709 are circumferentially spaced along the connecting disc 711 and are rotatably connected to the connecting disc 711. One end of the connecting rod 709 away from the connecting disc 711 is hinged with a support lever 710. One support lever 710 is rotatably connected at each notch of the support housing 707. The outer end of the support lever 710 extends to the outside of the support housing 707 to abut against the inner wall of the plastic inner tank 10.

[0027] The present invention also provides an automatic gluing method for the plastic inner tank and the valve seat of a type-IV hydrogen storage bottle, including the following steps: S1: The plastic inner tank 10 is sleeved on the outside of the support housing 707 on the inner tank tray 704. At the same time, the metal valve seat 9 is connected to the lower end of the valve seat connecting shaft 301. S2: Operate the support motor 712 so that the driving small gear 706 drives the driving large gear 705 to rotate, and then drives the support rotating shaft 708 and the connecting disc 711 connected thereto to rotate. The connecting disc 711 drives the connecting rod 709 and the support lever 710 to act, so that the support lever 710 supports the inner wall of the plastic inner tank 10 and automatically centers the plastic inner tank 10. S3: Operate the electric cylinder 201 to drive the movable platform 102 to descend. At the same time, operate the vertical cylinder 202 to drive the valve seat connection and pressing mechanism to descend to a preset position to avoid interference with the adjustable glue application mechanism. Operate the horizontal cylinder 402 so that the swing arm 403 is adjusted to a preset position. Operate the swing motor 404 so that the glue application cylinder 401 is adjusted to an angle suitable for glue output. S4: Operate the rotary motor 703 to drive the large rotary bearing 701 to rotate, and then make the inner tank support mechanism and the plastic inner tank 10 rotate synchronously. At the same time, operate the glue output motor 601 to drive the glue application rod 604 to act, so as to apply glue to the connection between the metal valve seat 9 and the plastic inner tank 10. S5: After the glue application is completed, operate the vertical cylinder 202 and the electric cylinder 201 to drive the metal valve seat 9 to continue moving downward. At the same time, operate the rotary motor 703 to drive the plastic inner liner 10 to rotate until the inner lining of the plastic inner liner 10 is aligned with the toothed structure of the metal valve seat 9. After alignment, continue to operate the vertical cylinder 202 to assemble the metal valve seat 9 on the plastic inner liner 10; S6: Operate the pressing cylinder 304 to drive the pressing joint 305 to descend to a position of 1 / 2 - 2 / 3 of the diameter of the metal valve seat 9. Observe the values of the pressure sensors 306 at the pressing joint 305 and make the values of the multiple pressure sensors 306 consistent. Cure the pressed metal valve seat 9 and the plastic inner liner 10 at room temperature for 48 h; S7: After the curing is completed, retract the pressing cylinder 304, operate the support motor 712 to drive the support lever 710 to retract, disconnect the connection between the metal valve seat 9 and the valve seat connecting shaft 301, operate the electric cylinder 201 to drive the valve seat connection and pressing mechanism to rise, and take out the bonded plastic inner liner 10 and the metal valve seat 9.

[0028] As described above, it is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any change or replacement that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An automatic glue - applying device for the plastic inner liner and valve seat of a type - IV hydrogen storage cylinder, characterized in that: It includes an integral machine frame (101), a movable platform (102), an inner - liner installation platform (103), a valve - seat connection and pressing mechanism, an inner - liner support and rotation mechanism, an adjustable glue - applying mechanism, and a glue storage tank (5); The movable platform (102) is slidably connected to the upper inner side of the integral machine frame (101) and can change its position through an electric cylinder (201). The valve - seat connection and pressing mechanism and the adjustable glue - applying mechanism are installed at the lower end of the movable platform (102); The valve - seat connection and pressing mechanism includes a valve - seat connection shaft (301) and a valve - seat pressing mechanism. The upper end of the valve - seat connection shaft (301) is connected to a vertical cylinder (202), and the vertical cylinder (202) is used to drive the valve - seat connection and pressing mechanism to make an axial reciprocating motion. The valve - seat pressing mechanism includes a pressing frame (303), pressing cylinders (304), pressing connectors (305), and pressure sensors (306). Among them, multiple pressing cylinders (304) are arranged at intervals around the pressing frame (303). The pressing connectors (305) are installed at the lower ends of the pressing cylinders (304), and pressure sensors (306) are arranged at the contact ends of the pressing connectors (305) with the metal valve seat (9). The lower end of the valve - seat connection shaft (301) is used to connect the metal valve seat (9). The valve - seat connection shaft (301) is installed on the pressing frame (303) of the valve - seat pressing mechanism through a clamping strip (302), and there is an adjustment gap between the valve - seat connection shaft (301) and the pressing frame (303). The valve - seat pressing mechanism is used to provide a pressing force on the metal valve seat (9) toward the side of the plastic inner liner (10); The inner - liner installation platform (103) is fixedly arranged at the lower part of the integral machine frame (101). The inner - liner support and rotation mechanism is installed on the inner - liner installation platform (103), and the inner - liner support and rotation mechanism is used to support the plastic inner liner (10) and drive the plastic inner liner (10) to rotate; The adjustable glue - applying mechanism includes a glue - applying cylinder (401) and an angle - adjusting mechanism. The angle - adjusting mechanism is used to adjust the orientation and position of the glue nozzle of the glue - applying cylinder (401) to realize glue - applying at the connection between the metal valve seat (9) and the plastic inner liner (10). The glue - inlet end of the glue - applying cylinder (401) is connected to the glue storage tank (5) through a glue - conveying pipeline (8), and the glue storage tank (5) is installed at the lower part of the integral machine frame (101).

2. The automatic glue coating device for the plastic inner liner and valve seat of a type-IV hydrogen storage cylinder according to claim 1, wherein: The upper end of the pressing frame (303) has a hollow cylinder. The valve - seat connection shaft (301) is movably inserted into the hollow cylinder. The side wall of the hollow cylinder has a limiting slot hole (307) that cooperates with the clamping strip (302), and the hole height of the limiting slot hole (307) is greater than the thickness of the clamping strip (302).

3. An automatic glue coating device for the plastic inner liner and valve seat of a type-IV hydrogen storage cylinder according to claim 1, characterized in that: The angle adjustment mechanism includes a horizontal cylinder (402), a swing arm (403) and a swing motor (404). There are two sets of angle adjustment mechanisms. A cylinder mounting seat (405) is installed at the lower end of the movable platform (102). The two sets of angle adjustment mechanisms are symmetrically installed on both sides of the cylinder mounting seat (405). The bottom end of the cylinder of the horizontal cylinder (402) is connected to the cylinder mounting seat (405). The top end of the cylinder of the horizontal cylinder (402) is rotatably connected to the middle part of the upper arm of the swing arm (403) through a pin shaft. The upper end of the swing arm (403) is rotatably connected to the movable platform (102) through a pin shaft. The caulking gun (401) is rotatably connected to the lower end of the swing arm (403) through the swing motor (404). A clamping member connected to the output end of the swing motor (404) is provided on the outer wall of the caulking gun (401).

4. An automatic glue coating device for the plastic inner liner and valve seat of a type-IV hydrogen storage bottle according to claim 3, characterized in that: It further includes a glue discharging mechanism for the caulking gun (401). The glue discharging mechanism includes a glue discharging motor (601), a glue barrel support plate (602), a threaded rod (603), a caulking rod (604), a slider (605) and a slider caulking rod connecting member (606); The glue discharging motor (601) is installed on the caulking gun (401) through the glue barrel support plate (602). The output end of the glue discharging motor (601) is connected to the threaded rod (603). The slider (605) is slidably connected to the threaded rod (603) and the slider (605) is connected to the end of the caulking rod (604) through the slider caulking rod connecting member (606). The front pressing plate of the caulking rod (604) is slidably arranged in the caulking gun (401).

5. The automatic glue coating device for the plastic inner liner and valve seat of a type-IV hydrogen storage bottle according to claim 4, characterized in that: The front end of the caulking gun (401) has a glue nozzle for changing the extrusion shape of the adhesive in the caulking gun (401). There are two caulking guns (401) located on both sides of the metal valve seat (9). The shape of the glue nozzle of one caulking gun (401) is a hollow cylinder, and the shape of the glue nozzle of the other caulking gun (401) is flat and the outlet end is a long strip hole.

6. A plastic inner liner and valve seat automatic gluing device for a type-IV hydrogen storage cylinder according to claim 4, characterized in that: The inner tank support slewing mechanism includes a slewing mechanism and an inner tank support mechanism; The slewing mechanism includes a large slewing bearing (701), a slewing support frame (702), a slewing motor (703) and an inner tank tray (704). The slewing support frame (702) is fixedly arranged at the lower end of the inner tank installation platform (103). The outer ring of the large slewing bearing (701) is installed inside the slewing support frame (702). The inner ring of the large slewing bearing (701) is bolted to the upper and lower parts of the inner tank tray (704); The inner container support mechanism includes a driving large gear (705), a driving small gear (706), a support housing (707), a support rotating shaft (708), a connecting rod (709), a support lever (710), a connecting disc (711), and a support motor (712). The support housing (707) is installed at the upper end of the lower part of the inner container tray (704), and the rotary motor (703) is installed on the rotary support frame (702) and the output end is connected to the bottom end of the support housing (707). The support rotating shaft (708) is rotatably installed at the central position of the inner cavity of the support housing (707). The driving large gear (705) and two connecting discs (711) are key-connected to the support rotating shaft (708) in sequence from bottom to top along the axial direction of the support rotating shaft (708). The support motor (712) is installed at the lower end of the inner container tray (704) and the output end extends to the inner cavity of the support housing (707) to be connected to the driving small gear (706). The driving small gear (706) is meshed with the driving large gear (705) for transmission. At the position where the side wall of the support housing (707) is at the same height as the connecting disc (711), a plurality of notches are circumferentially spaced. A plurality of connecting rods (709) are circumferentially spaced along the connecting disc (711) and are rotatably connected to the connecting disc (711). One end of the connecting rod (709) far from the connecting disc (711) is hinged with a support lever (710). One support lever (710) is rotatably connected at each notch of the support housing (707). The outer end of the support lever (710) extends to the outside of the support housing (707) to abut against the inner wall of the plastic inner container (10).

7. A plastic inner liner and valve seat automatic glue coating device for a type-IV hydrogen storage bottle according to claim 1, characterized in that: The whole machine frame (101), the movable platform (102), the inner container installation platform (103), the valve seat connection and pressing mechanism, the inner container support and rotation mechanism, and the adjustable sealant application mechanism are all coaxially arranged. The movable platform (102) is slidably connected to the slide rail inside the whole machine frame (101) through a sliding block. A guide post (104) is arranged at the lower end of the movable platform (102), and the guide post (104) movably passes through the lower inner container installation platform (103).

8. An automatic glue - applying method for the plastic inner liner and valve seat of a type - IV hydrogen storage bottle, relying on the automatic glue - applying device for the plastic inner liner and valve seat of a type - IV hydrogen storage bottle according to any one of claims 1 to 7, characterized in that, It includes the following steps: S1: The plastic inner container (10) is sleeved on the outside of the support housing (707) on the inner container tray (704), and at the same time, the metal valve seat (9) is connected to the lower end of the valve seat connecting shaft (301). S2: Operate the support motor (712) to make the driving small gear (706) drive the driving large gear (705) to rotate, and then drive the support rotating shaft (708) and the connecting disc (711) connected thereto to rotate. The connecting disc (711) drives the connecting rod (709) and the support lever (710) to act, so that the support lever (710) supports the inner wall of the plastic inner container (10) and automatically centers the plastic inner container (10). S3: Operate the electric cylinder (201) to drive the movable platform (102) to descend. At the same time, operate the vertical cylinder (202) to drive the valve seat connection and pressing mechanism to descend to a preset position to avoid interference with the adjustable sealant application mechanism. Operate the horizontal cylinder (402) to adjust the swing arm (403) to a preset position, and operate the swing motor (404) to adjust the sealant cartridge (401) to an angle suitable for sealant extrusion. S4: Operate the rotary motor (703) to drive the large rotary bearing (701) to rotate, thereby causing the inner liner support mechanism and the plastic inner liner (10) to rotate synchronously. At the same time, operate the sealant extrusion motor (601) to drive the sealant rod (604) to act, so as to apply sealant to the connection between the metal valve seat (9) and the plastic inner liner (10). S5: After the sealant application is completed, operate the vertical cylinder (202) and the electric cylinder (201) to drive the metal valve seat (9) to continue descending. At the same time, operate the rotary motor (703) to drive the plastic inner liner (10) to rotate until the lining of the plastic inner liner (10) is aligned with the toothed structure of the metal valve seat (9). After alignment, continue to operate the vertical cylinder (202) to assemble the metal valve seat (9) onto the plastic inner liner (10). S6: Operate the pressing cylinder (304) to drive the pressing joint (305) to descend to a position of 1 / 2 - 2 / 3 of the diameter of the metal valve seat (9). Observe the values of the pressure sensors (306) at the pressing joint (305) to make the values of multiple pressure sensors (306) consistent, and cure the pressed metal valve seat (9) and plastic inner liner (10) at room temperature for a preset time. S7: After curing is completed, retract the pressing cylinder (304), operate the support motor (712) to drive the support lever (710) to retract, disconnect the connection between the metal valve seat (9) and the valve seat connecting shaft (301), operate the electric cylinder (201) to drive the valve seat connection and pressing mechanism to rise, and take out the bonded plastic inner liner (10) and metal valve seat (9).

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