Assembly tooling and assembly method for composite gas cylinders

Abstract

The present invention discloses an assembly tooling and an assembly method for a composite gas cylinder, comprising: a bench; at least a part of a fixed table is slidably arranged on the bench, a first rotating shaft, one end of the first rotating shaft is pivotally connected to one end of the fixed table, and the other end of the first rotating shaft is used for fixedly connecting with a first metal valve seat of the composite gas cylinder, and the first metal valve seat is used for connecting with one end of a plastic inner liner of the composite gas cylinder; a second rotating shaft, one end of the second rotating shaft is pivotally connected to the other end of the fixed table, and the other end of the second rotating shaft is used for fixedly connecting with a second metal valve seat of the composite gas cylinder, and the second metal valve seat is used for connecting with the other end of the plastic inner liner; a driving member, the driving member is arranged at an end of the fixed table and is used for pushing one end of the fixed table towards the other end of the fixed table to compress the first metal valve seat, the plastic inner liner and the second metal valve seat.

Description

Technical Field

[0001] The present invention relates to the technical field of gas cylinder processing, and in particular to an assembly tooling and an assembly method for a composite gas cylinder. Background Art

[0002] In related technologies, composite gas cylinders are used to store pressurized liquid gases (such as hydrogen). There are several common types: all-metal gas cylinders, metal inner-liner fiber-wound gas cylinders, metal inner-liner fiber fully-wound gas cylinders, and non-metal inner-liner fully-wound gas cylinders. Among them, the first and second types of gas cylinders are heavy and difficult to meet the requirements of hydrogen storage density per unit mass. The third type of gas cylinder has a high cost. Therefore, the fourth type of gas cylinder has a better application prospect.

[0003] However, the non-metal inner liner is generally processed from plastic materials. To ensure the airtightness of the non-metal inner liner, a metal valve seat needs to be provided at the port of the non-metal inner liner, and then a carbon fiber composite material layer is wound. The metal valve seat and the non-metal inner liner are assembled by bonding. After bonding, it needs to be cured for 24 hours, which will occupy the winding machine production line and reduce the production efficiency of composite gas cylinders. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the present invention is to provide an assembly tooling for a composite gas cylinder. The assembly tooling can separately realize the assembly of a plastic inner liner and a metal valve seat, decouple the production line, and the plastic inner liner and the metal valve seat do not need to be cured on the winding machine after assembly, which can improve the production efficiency.

[0005] The present invention further provides an assembly method applicable to the above-mentioned assembly tooling.

[0006] The assembly tooling for a composite gas cylinder according to an embodiment of the first aspect of the present invention includes: a bench; a fixed table, at least part of which is slidably arranged on the bench; a first rotating shaft, one end of the first rotating shaft is pivotally connected to one end of the fixed table, and the other end of the first rotating shaft is used to be fixedly connected to a first metal valve seat of the composite gas cylinder, and the first metal valve seat is used to be connected to one end of a plastic inner liner of the composite gas cylinder; a second rotating shaft, one end of the second rotating shaft is pivotally connected to the other end of the fixed table, and the other end of the second rotating shaft is used to be fixedly connected to a second metal valve seat of the composite gas cylinder, and the second metal valve seat is used to be connected to the other end of the plastic inner liner; a driving member, which is arranged at the end of the fixed table and is used to push one end of the fixed table towards the other end of the fixed table to compress the first metal valve seat, the plastic inner liner and the second metal valve seat.

[0007] According to the assembly tooling for a composite gas cylinder according to an embodiment of the present invention, by decoupling the composite gas cylinder production line, assembling a plastic inner liner and a metal valve seat (a first metal valve seat and a second metal valve seat) through the assembly tooling, and pressing the metal valve seat and the plastic inner liner by a driving member, the sealing performance of the composite gas cylinder can be improved, and when the assembled plastic inner liner and metal valve seat are stationary, they do not need to occupy the winding machine, which can avoid the winding machine from stopping, so as to improve the production efficiency of the composite gas cylinder.

[0008] According to some embodiments of the present invention, the fixed table includes: a fixed bracket and a movable bracket. The fixed bracket is fixed at one end of the table frame, the movable bracket is slidably arranged at the other end of the table frame, the fixed bracket is pivotally connected to one end of the first rotating shaft, and the movable bracket is pivotally connected to one end of the second rotating shaft.

[0009] In some embodiments, connection portions are provided at the ends of the first rotating shaft and the second rotating shaft facing away from each other, and rotating bearings are provided on both the fixed bracket and the movable bracket. The rotating shaft bearings are connected to the connection portions through first adapters.

[0010] Further, the first adapter includes: a first pipe body portion and a second pipe body portion fixedly connected. The first pipe body portion is fixedly connected to the adapter portion, and the first adapter is fixed by inserting the second pipe body portion into the inner pipe of the rotating bearing.

[0011] Further, the first pipe body portion is a prismatic structure with a groove for fixedly connecting with the adapter portion, the second pipe body portion is a prismatic structure, and one end of the second pipe body portion is fixedly connected to the bottom surface of the first pipe body portion.

[0012] In some embodiments, the ends of the first rotating shaft and the second rotating shaft facing each other are respectively connected to the first metal valve seat and the second metal valve seat, and the first rotating shaft and the first metal valve seat, and the second rotating shaft and the second metal valve seat are fixedly connected through second adapters.

[0013] Further, the second adapter includes: a first shaft section, a second shaft section, and a third shaft section with gradually decreasing shaft diameters in the direction away from the first rotating shaft. The first shaft section is threadedly connected to the first rotating shaft, the second shaft section is used to abut against the end face of the metal valve seat, and the third shaft section is used to be threadedly connected to the first metal valve seat and the second metal valve seat.

[0014] In some embodiments, a first support roller is provided between the fixed bracket and the metal valve seat; and / or a second support roller is further provided between the movable bracket and the plastic inner liner.

[0015] According to some embodiments of the present invention, the movable bracket is arranged on the sliding table, the bottom surface of the sliding table has a guide groove, and a guide rail matching with the guide groove is arranged on the bench.

[0016] A method for assembling a composite gas cylinder according to an embodiment of the second aspect of the present application, the assembling method is applicable to the assembling tooling described in the above embodiments; the assembling method includes the following steps: fixing a first metal valve seat and a second metal valve seat on a first rotating shaft and a second rotating shaft respectively; rotating the first rotating shaft and the second rotating shaft, and applying glue to the first metal valve seat and the second metal valve seat; inserting one end of the plastic inner liner into the first metal valve seat and the other end into the second metal valve seat; pressing the first metal valve seat, the plastic inner liner and the second metal valve seat through a driving member to seal between the plastic inner liner and the first metal valve seat and the second metal valve seat; standing still to cure the bonding and gluing parts between the first metal valve seat and the second metal valve seat and the plastic inner liner; transferring the assembled first metal valve seat, plastic inner liner, second metal valve seat, first rotating shaft and second rotating shaft to a winding tooling.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a schematic diagram of the cooperation between the assembling tooling, the plastic inner liner and the metal valve seat according to an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of the cooperation between the bench, the fixed bracket, the rotating bearing and the first adapter of the assembling tooling according to an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the cooperation between the rotating bearing and the first adapter of the assembling tooling according to an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of the cooperation between the bench, the first support roller and the first adapter of the assembling tooling according to an embodiment of the present invention;

[0023] Figure 5 is a schematic diagram of the cooperation between the fixed bracket, the rotating bearing, the first adapter, the first rotating shaft, the second adapter, the first metal valve seat and the plastic inner liner of the assembling tooling according to an embodiment of the present invention;

[0024] Figure 6Schematic diagram of the cooperation of the driving member, moving bracket, second supporting roller and second rotating shaft of the assembly tooling according to an embodiment of the present invention;

[0025] Figure 7 It is a flowchart of the assembly method according to an embodiment of the present invention.

[0026] Reference numerals:

[0027] Assembly tooling 100, plastic inner liner 200, first metal valve seat 300,

[0028] Bench 10, guide rail 11,

[0029] Fixed bracket 21, moving bracket 22, rotating bearing 23,

[0030] Driving member 30, first supporting roller 41, second supporting roller 42, sliding table 50, control valve 60, first rotating shaft 70, second rotating shaft 80, first adapter 91, first pipe body portion 911, second pipe body portion 912, second adapter 92, first shaft section 921, second shaft section 922, third shaft section 923. Detailed implementation manners

[0031] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0032] Below with reference to Figures 1-7 Describe the assembly tooling 100 and assembly method of the composite gas cylinder according to an embodiment of the present invention.

[0033] As Figure 1 shown, the assembly tooling 100 of the composite gas cylinder according to an embodiment of the present invention includes: a bench 10, a fixed table, a driving member 30, a first rotating shaft 70 and a second rotating shaft 80.

[0034] Among them, at least a part of the fixed table is slidably arranged on the bench 10; one end of the first rotating shaft 70 is pivotally connected to one end of the fixed table, and the other end of the first rotating shaft 70 is used for fixedly connecting with the first metal valve seat 300 of the composite gas cylinder, and the first metal valve seat 300 is used for connecting with one end of the plastic inner liner 200 of the composite gas cylinder; one end of the second rotating shaft 80 is pivotally connected to the other end of the fixed table, and the other end of the second rotating shaft 80 is used for fixing the second metal valve seat of the composite gas cylinder, and the second metal valve seat is used for connecting with the other end of the plastic inner liner 200. The driving member 30 is arranged at the end of the fixed table and is used for pushing one end of the fixed table towards the other end of the fixed table to compress the first metal valve seat 300, the plastic inner liner 200 and the second metal valve seat.

[0035] Specifically, the fixed table can define a clamping space. The first metal valve seat 300 and the second metal valve seat are respectively arranged at both ends of the plastic inner liner 200 in the length direction. The clamping space is used to accommodate the plastic inner liner 200, the first metal valve seat 300, and the second metal valve seat. The first rotating shaft 70 can drive the first metal valve seat located at one end of the plastic inner liner 200 to rotate to evenly coat glue, and the second rotating shaft 80 can drive the second metal valve seat located at the other end of the plastic inner liner 200 to rotate to evenly coat glue. Then, the driving member 30 presses the first metal valve seat 300 against the plastic inner liner 200 and the second metal valve seat to ensure that the three are tightly fitted to achieve bonding and fixation, thereby realizing the assembly of the first metal valve seat 30, the second metal valve seat and the plastic inner liner 200.

[0036] It should be noted that the assembly tooling 100 of the present invention is separately provided and used for the assembly of the plastic inner liner 200 with the first metal valve seat 300 and the second metal valve seat, and is decoupled from the winding machine. After the metal valve seat and the plastic inner liner 200 in the prior art are assembled on the winding machine, they are left standing for 24 hours, and after ensuring the stable connection between the metal valve seat and the plastic inner liner 200, the winding operation is carried out. However, in the present invention, the plastic inner liner 200 and the metal valve seat are assembled through the assembly tooling 100, which does not occupy the assembly space of the winding machine, that is, the plastic inner liner 200 and the metal valve seat are assembled offline, and the winding machine performs winding online. Through decoupling, the winding machine is prevented from being shut down and occupied.

[0037] According to the assembly tooling 100 of the composite gas cylinder according to the embodiment of the present invention, by decoupling the composite gas cylinder production line, the plastic inner liner 200 and the metal valve seat (the first metal valve seat 300 and the second metal valve seat) are assembled through the assembly tooling 100, and the driving member 30 presses the metal valve seat against the plastic inner liner 200, which can improve the sealing performance of the composite gas cylinder, and the assembled plastic inner liner 200 and the metal valve seat do not need to occupy the winding machine when standing, which can avoid the winding machine from shutting down, so as to improve the production efficiency of the composite gas cylinder.

[0038] As Figure 2 、 Figure 5 and Figure 6 shown, according to some embodiments of the present invention, the fixed table includes: a fixed bracket 21 and a moving bracket 22. The fixed bracket 21 is fixed at one end of the table frame 10, the moving bracket 22 is slidably arranged at the other end of the table frame 10. The fixed bracket 21 is pivotally connected to one end of the first rotating shaft 70, the moving bracket 22 is pivotally connected to one end of the second rotating shaft. The plastic inner liner 200 and the first metal valve seat 300 and the second metal valve seat located at both ends of the plastic inner liner 200 are clamped between the first rotating shaft 70 and the second rotating shaft 80.

[0039] That is to say, the fixed bracket 21 and the movable bracket 22 are arranged oppositely. The first rotating shaft 70 on the fixed bracket 21 and the second rotating shaft 80 on the movable bracket 22 respectively fix a metal valve seat and can clamp the plastic inner liner 200. When applying a special bonding glue, the rotation of the metal valve seat can be controlled to ensure the uniformity of the coating of the special bonding glue, reduce the workload during the bonding operation, and improve the assembly efficiency.

[0040] As Figure 3 shown, in some embodiments, connection parts are arranged at the ends of the first rotating shaft 70 and the second rotating shaft 80 facing away from each other. Rotating bearings 23 are arranged on both the fixed bracket 21 and the movable bracket 22, and the rotating bearings 23 are connected to the connection parts through first adapters 91.

[0041] Specifically, connection parts are arranged at the ends of the first rotating shaft 70 and the second rotating shaft 80 facing away from each other. The shape of the connection part is the same as the shape of the insertion hole of the first adapter 91 (for example: both are constructed as hexagons), and the two are inserted and matched. One end of the first adapter 91 facing the fixed table is used for rotational cooperation with the fixed table or rotational cooperation with the winding tooling. Thus, by arranging the first adapter 91 and the rotating bearing 23, the first rotating shaft 70 and the fixed bracket 21, and the second rotating shaft 80 and the movable bracket 22 are detachably matched, and the first rotating shaft 70, the metal valve seat, the second rotating shaft 80, and the plastic inner liner 200 can be transferred to the winding machine for winding operation together, which can further improve the production efficiency of the composite gas cylinder.

[0042] As Figure 3 and Figure 5 shown, the first adapter 91 includes: a first pipe body part 911 and a second pipe body part 912 that are fixedly connected. The first pipe body part 911 is fixedly connected to the connection part, and the second pipe body part 912 is inserted into the inner pipe of the rotating bearing 23 for fixation.

[0043] In this way, the disassembly and assembly convenience between the first rotating shaft 70 and the first adapter 91, the second rotating shaft 80 and the first adapter 91, and the rotating bearing 23 and the first adapter 91 is higher. Facilitating disassembly and assembly can also improve the assembly efficiency of the composite gas cylinder.

[0044] It can be understood that the inner pipe can be constructed as a non-circular pipe, and the part of the first adapter 91 inserted into the inner pipe can also be constructed as a corresponding non-circular shape to achieve anti-rotation cooperation. In some other embodiments, anti-rotation keys can also be arranged.

[0045] As Figure 5 and Figure 6As shown, the first tube body portion 911 is a prismatic structure with grooves for fixedly connecting to the adapter portion, and the second tube body portion 912 is a prismatic structure. One end of the second tube body portion 912 is fixedly connected to the bottom surface of the first tube body portion 911 to achieve anti-rotation limit through the first tube body portion 911 and the second tube body portion 912, thereby improving the convenience of glue application.

[0046] In some embodiments, both the first tube body portion 911 and the second tube body portion 912 are configured as non-circular tubes.

[0047] In this way, anti-rotation limit can be achieved through the first tube body portion 911 and the second tube body portion 912 configured as non-circular tubes. During the glue application process, it can ensure that the metal valve seat stops at the appropriate position and rotates when the position needs to be switched, improving the convenience of glue application and the convenience of assembly.

[0048] It can be understood that a stepping motor can also be provided on the bench 10, and the stepping motor is used to drive the first rotating shaft 70 or the second rotating shaft 80 to rotate.

[0049] In some embodiments, the ends of the first rotating shaft 70 and the second rotating shaft 80 facing each other are respectively connected to the first metal valve seat 300 and the second metal valve seat. The first rotating shaft 70 and the first metal valve seat 300, and the second rotating shaft 80 and the second metal valve seat are both fixedly connected through the second adapter 92.

[0050] Specifically, the second adapter 92 includes: a first shaft section 921, a second shaft section 922, and a third shaft section 923 whose shaft diameters decrease sequentially in the direction away from the first rotating shaft 70. The first shaft section 921 is threadedly connected to the first rotating shaft 70, the second shaft section 922 is used to abut against the end face of the first metal valve seat 300 or the second metal valve seat, and the third shaft section 923 is threadedly connected to the first metal valve seat thread 30 or the second metal valve seat thread.

[0051] In this way, the second shaft section 922 can press the metal valve seat to, after the glue application of the metal valve seat is completed, press the metal valve seat and the plastic inner liner 200, improving the bonding stability between the metal valve seat and the plastic inner liner 200. The third shaft section 923 extends into the metal valve seat and is threadedly connected to the metal valve seat to drive the metal valve seat to rotate synchronously, which can avoid relative movement of the metal valve seat during the glue application process, improving the glue application accuracy, and further improving the assembly accuracy and assembly quality of the plastic inner liner 200 and the metal valve seat.

[0052] In Figure 4 and Figure 6 In the specific embodiments shown, a first support roller 41 is provided between the fixed bracket 21 and the metal valve seat; and / or a second support roller is further provided between the movable bracket 22 and the plastic inner liner 200.

[0053] It can be understood that the first support roller 41 is used to support the first rotating shaft 70, and the second support roller 42 is used to support the second rotating shaft 80 to ensure that the first rotating shaft 70 and the second rotating shaft 80 are on the same axis, so as to ensure the coaxiality diagram when the metal valve seat is press-fitted with the plastic inner liner 200 and improve the assembly quality. A plurality of first support rollers 41 and second support rollers 42 can be respectively arranged in the length direction of the first rotating shaft 70 and the length direction of the second rotating shaft 80 to improve the support effect. The first support roller 41 and the second support roller 42 can be slidably arranged on the bench 10 to switch between suitable support positions. The first support roller 41 and the second support roller 42 can be slidably arranged on the bench through a sliding plate, and the rollers of the first support roller 41 and the second support roller 42 can rotate in a direction perpendicular to the axial direction of the first rotating shaft 70 and the second rotating shaft 80.

[0054] In Figure 4 In the specific embodiments shown, according to some embodiments of the present invention, the moving bracket 22 is arranged on the sliding table 50. The bottom surface of the sliding table 50 has a guide groove, and a guide rail 11 cooperating with the guide groove is arranged on the bench 10. In this way, through the cooperation of the guide groove and the guide rail 11, the moving stroke of the moving bracket 22 is defined, which not only facilitates the driving member 30 to drive the moving bracket 22 to move relative to the fixed bracket 21, but also makes the size of the clamping space of the fixed table adjustable, and can be applicable to plastic inner liners 200 with various different axial lengths, improving the applicable range of the assembly tooling 100 of the composite gas cylinder of the present invention.

[0055] In some embodiments, the driving member 30 is a driving cylinder, and a control valve 60 communicating with the driving cylinder is arranged on the bench 10. In this way, the movement stroke of the driving cylinder can be controlled through the control valve 60 to ensure that the pressing amount can be accurately controlled.

[0056] As Figure 7 shown, according to the assembly method of the composite gas cylinder in the second aspect embodiment of the present application, the assembly method is applicable to the assembly tooling 100 in the above embodiments; the assembly method includes the following steps:

[0057] Fix the first metal valve seat 300 and the second metal valve seat on the first rotating shaft 70 and the second rotating shaft 80 respectively;

[0058] Rotate the first rotating shaft 70 and the second rotating shaft 80, and apply glue to the first metal valve seat 300 and the second metal valve seat;

[0059] Insert one end of the plastic inner liner 200 into the first metal valve seat 300, and the other end into the second metal valve seat;

[0060] The driving member 30 presses the first metal valve seat 300, the plastic inner container 200, and the second metal valve seat, and after sealing the plastic inner container 200 with the first metal valve seat 300 and the second metal valve seat, it is left standing to cure the bonding joints between the first metal valve seat 300 and the second metal valve seat and the plastic inner container 200;

[0061] That is, after pressing the metal valve seat and the plastic inner container 200, it is left standing for the first period of time;

[0062] After leaving it standing for the first period of time, the assembled first metal valve seat 300, plastic inner container 200, second metal valve seat, first rotating shaft 70, and second rotating shaft 80 are transferred to the winding tooling.

[0063] Next, the assembly process of the assembly tooling 100 for the composite gas cylinder according to the embodiment of the present invention will be specifically described.

[0064] First, the first metal valve seat 300 and the second metal valve seat to be assembled are respectively fixed on the first rotating shaft 70 and the second rotating shaft 80 through two second adapters 92, and the other ends of the first rotating shaft 70 and the second rotating shaft 80 are respectively fixed on the fixed bracket 21 and the moving bracket 22 through the second adapters 92.

[0065] Furthermore, the metal valve seats on the first rotating shaft 70 and the second rotating shaft 80 are rotated to evenly apply a special bonding glue. After the bonding is completed, the metal valve seat and the plastic inner container 200 are pressed by the driving member 30. After standing for 24 hours to ensure stable bonding, the first rotating shaft 70, the second rotating shaft 80, the first adapter 91, the second adapter 92, the metal valve seat, and the plastic inner container 200 are removed together and transported to the winding machine for winding operation.

[0066] In this way, not only can the assembly accuracy and assembly reliability of the metal valve seat and the plastic inner container 200 be improved, but also during the assembly process, the winding machine will not be occupied, and the winding machine can be decoupled to improve production efficiency.

[0067] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are 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, and therefore should not be construed as a limitation to the present invention.

[0068] In the description of the present invention, the "first feature" and "second feature" may include one or more of such features.

[0069] In the description of the present invention, the meaning of "a plurality of" is two or more.

[0070] In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0071] In the description of the present invention, the first feature being "on", "above", and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0072] In the description of this specification, descriptions with reference to terms such as "an embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0073] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An assembly tooling for a composite gas cylinder, characterized in that, Comprising: A bench (10); A fixed table, at least part of which is slidably arranged on the bench (10); A first rotating shaft (70), one end of the first rotating shaft (70) is pivotally connected to one end of the fixed table, and the other end of the first rotating shaft (70) is used for fixedly connecting with the first metal valve seat (300) of the composite gas cylinder, and the first metal valve seat (300) is used for connecting with one end of the plastic inner liner (200) of the composite gas cylinder; A second rotating shaft (80), one end of the second rotating shaft (80) is pivotally connected to the other end of the fixed table, and the other end of the second rotating shaft (80) is used for fixedly connecting with the second metal valve seat of the composite gas cylinder, and the second metal valve seat is used for connecting with the other end of the plastic inner liner (200); A driving member (30), which is arranged at the end of the fixed table and is used for pushing one end of the fixed table towards the other end of the fixed table to press the first metal valve seat (300), the plastic inner liner (200) and the second metal valve seat; Wherein The fixed table includes: a fixed bracket (21) and a moving bracket (22), the fixed bracket (21) is fixed at one end of the bench (10), the moving bracket (22) is slidably arranged at the other end of the bench (10), the fixed bracket (21) is pivotally connected to one end of the first rotating shaft (70), and the moving bracket (22) is pivotally connected to one end of the second rotating shaft (80); Connection parts are arranged at the ends of the first rotating shaft (70) and the second rotating shaft (80) facing away from each other, and rotating bearings (23) are arranged on both the fixed bracket (21) and the moving bracket (22), and the rotating bearings (23) are connected to the connection parts through a first adapter (91); The first adapter (91) includes: a first pipe body part (911) and a second pipe body part (912) fixedly connected, the first pipe body part (911) is fixedly connected to the connection part, and the first adapter (91) is fixed by inserting the second pipe body part (912) into the inner pipe of the rotating bearing (23); A first support roller (41) is arranged between the fixed bracket (21) and the first metal valve seat (300); and / or a second support roller (42) is further arranged between the moving bracket (22) and the plastic inner liner (200).

2. The assembly tooling for the composite gas cylinder according to claim 1, characterized in that, The first pipe body part (911) is a prismatic structure with a groove, the groove is used for fixedly connecting with the connection part, the second pipe body part (912) is a prismatic structure, and one end of the second pipe body part (912) is fixedly connected to the bottom surface of the first pipe body part (911).

3. The assembly tooling for the composite gas cylinder according to claim 1 or 2, characterized in that, The ends of the first rotating shaft (70) and the second rotating shaft (80) facing each other are respectively connected to the first metal valve seat (300) and the second metal valve seat, and the first rotating shaft (70) is fixedly connected to the first metal valve seat (300), and the second rotating shaft (80) is fixedly connected to the second metal valve seat through a second adapter (92).

4. The assembly tooling for the composite gas cylinder according to claim 3, characterized in that, The second adapter (92) includes: a first shaft section (921), a second shaft section (922), and a third shaft section (923) with gradually decreasing shaft diameters in a direction away from the first rotating shaft (70). The first shaft section (921) is threadedly connected to the first rotating shaft (70). The second shaft section (922) is used to abut against the end face of the first metal valve seat (300) or the second metal valve seat. The third shaft section (923) is used to be threadedly connected to the first metal valve seat (300) or the second metal valve seat.

5. The assembly tooling for the composite gas cylinder according to claim 1, characterized in that The moving bracket (22) is arranged on the sliding table (50). The bottom surface of the sliding table (50) has a guide groove, and a guide rail (11) matching the guide groove is arranged on the table frame (10).

6. An assembly method for a composite gas cylinder, characterized in that, The assembly method is applicable to the assembly tooling (100) described in any one of claims 1 - 5. The assembly method includes the following steps: Fix the first metal valve seat (300) and the second metal valve seat on the first rotating shaft (70) and the second rotating shaft (80) respectively. Rotate the first rotating shaft (70) and the second rotating shaft (80), and apply glue to the first metal valve seat (300) and the second metal valve seat. Insert one end of the plastic inner liner (200) into the first metal valve seat (300), and the other end into the second metal valve seat. Press the first metal valve seat (300), the plastic inner liner (200), and the second metal valve seat through the driving member (30) to seal between the plastic inner liner (200) and the first metal valve seat (300) and the second metal valve seat. Let it stand still to cure the bonding and gluing parts between the first metal valve seat (300) and the second metal valve seat and the plastic inner liner (200). Transfer the assembled first metal valve seat (300), plastic inner liner (200), second metal valve seat, first rotating shaft (70), and second rotating shaft (80) to the winding tooling.

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