Gas cylinder heating device and method for using same

Abstract

The present invention relates to the technical field of gas cylinder machining. Disclosed are a gas cylinder heating device and a method for using same. A rotary heating device capable of driving inner containers to rotate and heating cavities of the inner containers is arranged in the axial direction of the inner containers arranged on a gantry frame, and the rotary heating device comprises winding fixture bodies; the ends of the winding fixture bodies extend into the inner containers and are fixedly connected to openings of the inner containers; air inlet flow channels and air outlet flow channels are formed in the winding fixture bodies and are respectively communicated with the cavities of the inner containers; the gantry frame is provided with a heating trolley located outside the inner containers; the heating trolley comprises a support; the support is connected to the gantry frame by means of a slide groove and a sliding block; the slide groove is parallel to the axis of the inner containers; heating heads are provided on the support; and the motion trajectory of the heating heads is consistent with a doffing point of a yarn piece on a gas cylinder. Thus, the temperature difference between a yarn piece to be bonded and the outer surface of an inner container and / or a yarn piece bonded to the outer surface of the inner container is reduced, and the wettability of resins to fibers and the shear strength between composite layers are improved.

Description

Gas cylinder heating device and use method thereof Technical Field

[0001] The present invention relates to the technical field of gas cylinder processing, and in particular to a gas cylinder heating device and a use method thereof. Background Art

[0002] Winding is a common method for forming resin-based composite materials. It involves winding continuous fibers (or tapes, prepregs) impregnated with resin glue onto a core mold in a specific pattern. The resulting product is then cured and demolded. Dry winding is a trending technology for the future due to its excellent batch quality stability, fast winding speed, long room-temperature resin pot life, and favorable operating environment.

[0003] In dry winding, the resin's poor fluidity at room temperature results in poor fiber wettability, resulting in low interlaminar shear strength in the composite layer. The magnitude of this interlaminar shear strength directly affects the fiber strength utilization rate. This is one of the key technologies that need to be overcome in the dry winding process. Existing technologies, such as utility model patent application number 201820403056.5 and invention patent application number 201310411000.6, first heat the insulation material with a heating device and then wrap it around the inner liner. Since the heated insulation material gradually cools during the winding process, the fiber wettability and interlaminar bonding performance of the cylinder resin produced by this winding method need to be further improved.

[0004] Therefore, how to design a gas cylinder heating device and its use method to improve the resin's wettability to the fiber and enhance the shear strength between the composite layers is a technical problem that needs to be solved urgently in this field.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to address the defects and shortcomings of the prior art and provide a gas cylinder heating device and a method of use to improve the wettability of the resin to the fiber and enhance the shear strength between the composite layers.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] The present invention provides a gas cylinder heating device, comprising a rotary heating device disposed along the axial direction of an inner liner mounted on a gantry frame, which can both drive the inner liner to rotate and heat the inner liner cavity. The rotary heating device comprises a winding tool body capable of self-rotation, the distal end of which extends into and is fixedly connected to the bottle mouth of the inner liner. An inlet and an outlet flow channel are disposed within the winding tool body, the inlet and outlet flow channels being respectively connected to the cavity of the inner liner.

[0009] The gantry is also provided with a heating trolley located outside the inner liner, the heating trolley includes a bracket that can move along the axial direction of the inner liner, the bracket and the gantry are connected by a slide groove and a slider, the slide groove is parallel to the axis of the inner liner, and the bracket is provided with a heating head, the movement trajectory of the heating head is consistent with the yarn drop point on the gas cylinder;

[0010] Preferably, an air pipe capable of extending into the inner cavity of the liner is provided at one end of the inlet flow channel, a cavity connected to the inlet flow channel is provided inside the air pipe, the length of the air pipe is adapted to the length of the cavity of the liner, and the other end of the inlet flow channel is connected to the heat source through a hot air duct; an air outlet is provided on the winding tool body, one end of the outlet flow channel is connected to the air outlet, and the other end of the outlet flow channel is connected to the cavity of the liner;

[0011] Preferably, the winding tool body is further provided with an air inlet connected to the inlet flow channel, and bearings are respectively provided on both axial sides of the air inlet, the inner ring of the bearing is fixedly connected to the winding tool body, and the outer ring of the bearing is fixedly connected to the outer ring, and the outer ring is connected to the heat source through the hot air duct;

[0012] Preferably, the outer ring is provided with a through hole connected to the air inlet, the side wall of the through hole is provided with an internal thread, and the hot air duct is provided with an external thread used in conjunction with the internal thread;

[0013] Preferably, each bearing is provided with a skeleton oil seal on a side away from the air inlet for sealing the gap between the outer ring and the winding tooling body, and retaining springs are provided at both axial ends of the bearing;

[0014] Preferably, a shaft shoulder and a retaining ring are respectively provided on the winding tool body, wherein one of the skeleton oil seals is tightly fitted with the shaft shoulder, and the other skeleton oil seal is tightly fitted with the retaining ring;

[0015] Preferably, the gantry comprises two oppositely arranged uprights and a crossbeam connecting the two uprights, wherein one of the uprights is provided with a tail top, and the other upright is provided with a chuck, the chuck clamps the winding tool body, one end of the inner liner is threadedly connected to the winding tool body, and the other end of the inner liner is rotatably connected to the tail top; the heating trolley is provided on one side of the gantry, and a winding trolley is provided on the other side opposite to the heating trolley, the heating trolley and the winding trolley are respectively slidably connected to the crossbeam, and the movement trajectory of the winding trolley is parallel to the movement trajectory of the heating trolley;

[0016] Preferably, the heating trolley is provided with a support frame capable of moving up and down, the support frame is rotatably connected to the support via a connecting rod, and the support is fixedly connected to the heating head;

[0017] The present invention also provides a method for using the gas cylinder heating device, comprising the following contents:

[0018] S1. Preheat the winding tooling body and the liner, and heat the winding tooling body and the liner in an oven at 100°C for two hours;

[0019] S2. Assemble the components. Connect the hot air duct and air pipe to the heated winding tooling body. Insert the assembled air pipe into the liner cavity. Thread the winding tooling body into the liner. Clamp one end of the winding tooling body with the gantry chuck. Connect the other end of the liner to the tailpiece.

[0020] S3. Wrap the gas cylinder. Start the driving devices for rotating the winding tool body and moving the heating trolley and the winding trolley respectively. While the gas cylinder rotates, the winding trolley and the heating trolley move along the axial and radial directions of the gas cylinder to complete the winding of the liner. While winding, turn on the heat source connected to the hot air duct and the heating head to heat the liner from the inside and outside respectively.

[0021] Compared with the prior art, the present invention has achieved the following technical effects:

[0022] 1. The present invention provides an inlet air flow channel and an outlet air flow channel on the winding tool body, so that when the winding tool body drives the inner liner to rotate, heat can flow into the cavity of the inner liner through the inlet air flow channel to heat the inner liner, thereby increasing the temperature of the outer surface of the inner liner and the yarn sheet already adhered to the outer surface of the inner liner. In addition, the heating trolley moves along the axial direction of the inner liner to heat the yarn sheet falling on the outer surface of the inner liner, thereby reducing the temperature difference between the yarn sheet to be pasted and the outer surface of the inner liner and / or the yarn sheet already adhered to the outer surface of the inner liner, promoting the flow of resin glue on the yarn sheet, improving the wettability of the resin glue to the fiber, improving the shear strength between the composite layers, and improving the strength of the fibers wound on the outer surface of the inner liner, thereby achieving the effect of reducing fiber usage and saving production costs.

[0023] 2. The present invention connects the heat source and the winding tooling body through a bearing, so that when the winding tooling body rotates following the main shaft of the winding machine, the outer ring and the hot air duct can be fixed at a certain position to provide continuous hot air to the inside of the inner liner, which solves the problem that the general winding tooling cannot continuously heat the rotating inner liner. In conjunction with the reciprocating motion of the heating trolley on the Y axis and the telescopic motion on the Z axis, the purpose of continuously winding the fiber yarn sheets around the inner liner is achieved while heating the inside and outside, thereby improving the production efficiency of the device.

[0024] 3. The present invention can adapt to inner liner of different sizes by changing the length of the air tube, and has a wide range of adaptability. The length of the air tube is adapted to the length of the inner liner, so that heat can be evenly distributed to various parts of the inner liner, thereby improving the uniformity of the outer surface temperature of the inner liner and improving the quality of the gas cylinder formed after winding.

[0025] 4. The present invention seals the heat in the enclosed space formed by the outer ring and the winding tool body through the sealing effect of the skeleton oil seal, the inner and outer tapered threads and the inner liner bottle mouth sealing structure, and then heats the inner liner through the air circulation inside the winding tool body, thereby reducing the amount of heat leakage and improving the heating efficiency of the inner liner. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] FIG1 is a schematic structural diagram of a rotary heating device;

[0028] Figure 2 is a schematic diagram of the overall structure of the gas cylinder heating device;

[0029] FIG3 is a schematic diagram of the overall structure of the gas cylinder heating device from another angle;

[0030] FIG4 is a schematic structural diagram of a hot air duct;

[0031] Figure 5 is an enlarged structural diagram of point A;

[0032] Figure 6 is an enlarged structural diagram of point B;

[0033] FIG7 is an enlarged structural diagram of point C. FIG.

[0034] Among them, 1. Gantry; 2. Inner liner; 3. Winding tool body; 4. Inlet air duct; 5. Outlet air duct; 6. Heating trolley; 7. Bracket; 8. Heating head; 9. Air pipe; 10. Bearing; 11. Air outlet; 12. Air inlet; 13. Outer ring; 14. Hot air duct; 15. Slot; 16. Skeleton oil seal; 17. Shoulder; 18. Retaining ring; 19. Column; 20. Beam; 21. Winding trolley; 22. Support frame; 23. Support. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] As shown in Figures 1 to 6, the present invention provides a gas cylinder heating device, comprising an inner liner 2 arranged on a gantry 1, and a rotating heating device is provided along the axial direction of the inner liner 2, which can both drive the inner liner 2 to rotate and heat the cavity of the inner liner 2, and the rotating heating device includes a winding tool body 3 that can rotate, and the end of the winding tool body 3 extends into and is fixedly connected to the bottle mouth of the inner liner 2, and the interior of the winding tool body 3 is provided with an inlet air flow channel 4 and an outlet air flow channel 5, which are respectively connected to the cavity of the inner liner 2; the gantry 1 is also provided with a heating trolley 6 located outside the inner liner 2, and the heating trolley 6 includes a bracket 7 that can move along the axial direction of the inner liner 2, and the bracket 7 and the gantry 1 are connected by a slide groove and a slider structure, and the slide groove is parallel to the axis of the inner liner 2, and a heating head 8 is provided on the bracket 7, and the movement trajectory of the heating head 8 is consistent with the yarn dropping point of the yarn sheet on the inner liner 2.

[0038] When the winding tooling body 3 drives the inner liner 2 to rotate, heat flows into the cavity of the inner liner 2 through the air inlet duct 4, heating the side wall of the inner liner 2, and increasing the temperature of the outer surface of the inner liner 2 and the gauze sheets that have been adhered to the outer surface of the inner liner 2. In addition, when the inner liner 2 rotates, the heating trolley 6 moves along the axial direction of the inner liner 2, heating the gauze sheets that fall on the outer surface of the inner liner 2, reducing the temperature difference between the gauze sheets to be pasted and the outer surface of the inner liner 2 and / or the gauze sheets that have been adhered to the outer surface of the inner liner 2, promoting the flow of resin glue on the gauze sheets, improving the wettability of the resin glue on the fibers, improving the shear strength between the composite layers, and improving the strength of the fibers wrapped around the outer surface of the inner liner 2; it can also reduce the amount of fiber used and save production costs.

[0039] One end of the inlet flow channel 4 is provided with an air pipe 9 that can extend into the internal cavity of the liner 2, and the inside of the air pipe 9 is provided with a cavity connected to the inlet flow channel 4, the length of the air pipe 9 is adapted to the length of the cavity of the liner 2, and the other end of the inlet flow channel 4 is connected to the heat source through the hot air duct 14; an air outlet 11 is provided on the winding tool body 3, one end of the outlet flow channel 4 is connected to the air outlet 11, and the other end of the outlet flow channel 5 is connected to the cavity of the liner 2; the length of the air pipe 9 is adapted to the length of the cavity of the liner 2, which can evenly heat the liner 2 and avoid uneven heat distribution inside the liner 2 due to the distance between the air pipe 9 outlet and the bottom of the liner 2 being too far; it can be evenly distributed along the length direction of the air pipe 9 A number of small holes are evenly opened, and heat flows along the air pipe 9 while flowing into the cavity of the inner liner 2 through the small holes, so as to achieve the purpose of uniform heating of various parts of the inner liner 2. The above-mentioned small holes can also be omitted, and the heat only flows out through the outlet at the end of the air pipe 9, and then diffuses to other parts of the cavity of the inner liner 2. In order to facilitate the flow of gas, a gap is provided between the end of the air pipe 9 and the cavity of the inner liner 2; the connection method of the air pipe 9 and the inlet flow channel 4 can be welding, bonding, screwing, etc. In order to facilitate disassembly and replacement, the present invention preferably uses a threaded connection between the air pipe 9 and the inlet flow channel 4; in order to prevent the discharged hot gas from scalding the operator, the air outlet 11 needs to be set as far away from the bottle mouth of the inner liner 2 as possible.

[0040] The winding tooling body 3 is also provided with an air inlet 12 connected to the inlet air duct 4, and bearings 10 are respectively provided on both axial sides of the air inlet 12. The inner ring of the bearing 10 is fixedly connected to the winding tooling body 3, and the outer ring of the bearing 10 is fixedly connected to the outer ring 13. The outer ring 13 is connected to the heat source through the hot air duct 14; specifically, an internal threaded hole is provided on the outer ring 13, and a corresponding external thread is provided on the hot air duct 14. The outer ring 13 is threadedly connected to the hot air duct 14. In order to improve the sealing performance of the connection between the outer ring 13 and the hot air duct 14, the external thread on the hot air duct 14 and the internal thread on the outer ring 13 are tapered threads that can play a sealing role. The heat source is a hot air gun. The hot air duct 14 can be connected to the hot air gun directly or via a flexible high-temperature air duct. In the present invention, the end of the hot air duct 14 away from the outer ring 13 is preferably connected to the hot air gun via the flexible high-temperature air duct. The ends of the flexible high-temperature air duct are clamped with clamps to respectively clamp the hot air duct 14 and the hot air gun. The hot air duct 14 is also provided with a clamping slot 15 for securing the hot air duct 14 via a rope.

[0041] Each bearing 10 is provided with a skeleton oil seal 16 on the side away from the air inlet 12 for sealing the gap between the outer ring and the winding tooling body 3, and a retaining spring is provided at both axial ends of the bearing 10; a shaft shoulder 17 and a retaining ring 18 are respectively provided on the winding tooling body 3, one of the skeleton oil seals 16 is tightly fitted with the shaft shoulder 17, and the other skeleton oil seal 16 is tightly fitted with the retaining ring 18, and the skeleton oil seal 16 is limited and fixed by the shaft shoulder 17 and the retaining ring 18.

[0042] To improve the smoothness of rotation, the surface roughness of the contact position between the inner surface of the outer ring 13 and the bearing 10 and the skeleton oil seal 16, as well as the contact position between the outer surface of the winding tool body 3 and the bearing 10 and the skeleton oil seal 16 are both less than 1.6.

[0043] The sealing effect of the skeleton oil seal 16, the inner and outer tapered threads and the bottle mouth sealing structure of the inner liner 2 can seal the heat in the enclosed space formed by the outer ring 13 and the winding tool body 3, and heat the inner liner 2 through the air circulation inside the winding tool body 3, thereby reducing heat leakage and improving the heating efficiency of the inner liner 2.

[0044] The gantry 1 includes two oppositely arranged columns 19 and a crossbeam 20 connecting the two columns 19, wherein a tail top is provided on one of the columns 19, and a chuck is provided on the other column 19, the chuck clamps the winding tool body 3, the bottle mouth of the liner 2 is threadedly connected to the winding tool body 3, and the bottle bottom of the liner 2 is rotatably connected to the tail top. When working, the driving mechanism drives the winding tool body 3 to rotate, and the winding tool body 3 drives the liner 2 to rotate; a heating trolley 6 is provided on one side of the gantry 1, and a winding trolley 21 is provided on the other side opposite to the heating trolley 6. The heating trolley 6 and the winding trolley 21 are respectively slidably connected to the crossbeam 20, and the movement trajectory of the winding trolley 21 is the same as that of the heating trolley 6. The movement trajectory of the heating trolley 6 is parallel to that of the heating trolley 6; similar to the structure of the heating trolley 6, the winding trolley 21 also has a bracket 7, and the top of the bracket 7 of the heating trolley 6 and the winding trolley 21 are respectively provided with a slide groove, and the two slide grooves are connected mouth to mouth, and the total length of the two slide grooves connected together is adapted to the width of the crossbeam 20 of the gantry 1. The crossbeam 20 of the gantry 1 is parallel to the axis of the inner tank 2. The movement path of the heating trolley 6 and the winding trolley 21 is limited by the cooperation of the slide groove and the crossbeam 20. The heating trolley 6 and the winding trolley 21 are respectively arranged on both sides of the gantry 1 to prevent the heating trolley 6 and the winding trolley 21 from conflicting in their travel ranges during the winding process.

[0045] The bracket 7 of the heating trolley 6 is provided with a support frame 22 that can move up and down. The support frame 22 is connected to the bracket 7 through a slide structure. The support frame 22 is rotatably connected to the support 23 through a connecting rod. The support 23 is fixedly connected to the heating head 8. The heating head 8 includes but is not limited to hot air heating, infrared heating and the like. The Y-direction position of the heating head 8 is adjusted by the movement of the bracket 7 along the beam 20. The Z-direction and up and down positions of the heating head 8 can be adjusted by adjusting the angle of the support 23 by the up and down movement of the support frame 22 and / or rotating the connecting rod, so as to achieve the purpose of the heating head 8 being able to heat the entire gas cylinder in real time.

[0046] The present invention also provides a method for using the gas cylinder heating device, comprising the following contents:

[0047] S1 preheating tooling body 3 and the inner liner 2, the tooling body 3 and the inner liner 2 is placed in an oven at 100 ℃ for two hours;

[0048] By preheating the winding tool body 3 and the inner liner 2 , the time for heating the inner liner 2 can be saved.

[0049] S2. Assemble the components, connect the hot air duct 14 and the air pipe 9 to the preheated winding tooling body 3, and after assembly, extend the air pipe 9 into the cavity of the liner 2. Thread the winding tooling body 3 and the liner 2 together. Clamp the gantry chuck to one end of the winding tooling body, and connect the other end of the liner 2 to the tail top 21.

[0050] Specifically, when winding, first screw the hot air duct 14 into the inner thread on the outer ring 13, and connect the hot air duct 14 to the hot air gun through a flexible high-temperature air duct. The two ends of the flexible high-temperature air duct are clamped with clamps to respectively clamp the hot air duct 14 and the hot air gun. The hot air duct 14 is fixed by the card slot 15 on the hot air duct 14, so that the outer ring 13 can be fixed at the same time. Then screw the air pipe 9 into the winding tool body 3, and connect the winding tool body 3 to the bottle mouth of the liner 2 by threading. The bottom of the bottle of the liner 2 is connected to the tail top 21 to complete the assembly between the components.

[0051] S3. Wrap the gas cylinder, start the driving devices for driving the winding tool body 3 to rotate and the heating trolley 6 and the winding trolley 21 to move respectively. While the gas cylinder rotates, the winding trolley 21 and the heating trolley 6 move along the axial and radial directions of the gas cylinder to complete the winding of the inner liner 2; while winding, turn on the heat source connected to the hot air duct 14 and the heating head 8 to heat the inner liner 2 from the inside and outside respectively.

[0052] Specifically, the hot air gun is turned on, and hot air enters the outer ring 13 through the flexible high-temperature air duct and hot air pipe 14. Two air paths within the winding tool body 3 form a hot air circulation system, heating the inner liner 2. While the rotating heating winding tool is in operation, the heating trolley 6, integrated into the winding machine gantry 1, is turned on. The machine code is edited to ensure that the movement trajectory of the heating trolley 6 is as consistent as possible with the yarn drop point on the cylinder during winding. This coordinates the reciprocating motion of the heating trolley 6 on the Y axis and the telescopic motion of the heating trolley 6 on the Z axis to achieve real-time heating of the entire cylinder. If the vertical position of the heating component needs to be adjusted, this can be achieved by moving the support frame 22 up and down, rotating the connecting rod to adjust the angle of the support 23, and coordinating the telescopic motion of the heating trolley 6 on the Z axis. When operations such as yarn splicing and yarn cutting are required, the machine code is interrupted and the heating trolley 6 is moved to the side of the gantry 1 for operation. During the winding process, the cylinder surface temperature can be monitored in real time using a temperature measuring gun or other means, and the heating temperature can be adjusted by adjusting the output parameters of the hot air gun and heating trolley 6 on the rotating heating winding tool.

[0053] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention, and any reference signs in the claims should not be construed as limiting the claims to which they relate.

Claims

1. A gas cylinder heating device, characterized in that: A rotary heating device is provided along the axial direction of the inner liner arranged on the gantry, which can drive the inner liner to rotate and heat the inner liner cavity. The rotary heating device includes a winding tool body that can rotate, and the end of the winding tool body extends into and is fixedly connected to the bottle mouth of the inner liner. An inlet air flow channel and an outlet air flow channel are provided inside the winding tool body, and the inlet air flow channel and the outlet air flow channel are respectively connected to the cavity of the inner liner; The gantry is also provided with a heating trolley located outside the inner liner, the heating trolley includes a bracket that can move along the axial direction of the inner liner, the bracket and the gantry are connected through a slide groove and a slider, the slide groove is parallel to the axis of the inner liner, and the bracket is provided with a heating head, and the movement trajectory of the heating head is consistent with the yarn falling point of the yarn piece on the gas cylinder.

2. The gas cylinder heating device according to claim 1, characterized in that: An air pipe capable of extending into the inner cavity of the liner is provided at one end of the inlet air flow channel, a cavity connected to the inlet air flow channel is provided inside the air pipe, the length of the air pipe is adapted to the length of the cavity of the liner, and the other end of the inlet air flow channel is connected to a heat source through a hot air duct; an air outlet is provided on the winding tooling body, one end of the outlet air flow channel is connected to the air outlet, and the other end of the outlet air flow channel is connected to the cavity of the liner.

3. The gas cylinder heating device according to claim 2, characterized in that: The winding tool body is also provided with an air inlet connected to the inlet air duct, and bearings are respectively provided on both axial sides of the air inlet. The inner ring of the bearing is fixedly connected to the winding tool body, and the outer ring of the bearing is fixedly connected to the outer ring. The outer ring is connected to the heat source through the hot air duct.

4. The gas cylinder heating device according to claim 3, characterized in that: The outer ring is provided with a through hole connected with the air inlet, the side wall of the through hole is provided with an internal thread, and the hot air duct is provided with an external thread used in conjunction with the internal thread.

5. The gas cylinder heating device according to claim 3, characterized in that: A skeleton oil seal for sealing the gap between the outer ring and the winding tooling body is provided on one side of each bearing away from the air inlet, and retaining springs are provided at both axial ends of the bearing.

6. The gas cylinder heating device according to claim 5, characterized in that: A shaft shoulder and a retaining ring are respectively provided on the winding tool body, wherein one of the skeleton oil seals is tightly fitted with the shaft shoulder, and the other skeleton oil seal is tightly fitted with the retaining ring.

7. The gas cylinder heating device according to claim 1, characterized in that: The gantry includes two oppositely arranged columns and a crossbeam connecting the two columns, wherein one of the columns is provided with a tail top, and the other column is provided with a chuck, the chuck clamps the winding tooling body, one end of the inner liner is threadedly connected to the winding tooling body, and the other end of the inner liner is rotatably connected to the tail top; the heating trolley is provided on one side of the gantry, and a winding trolley is provided on the other side opposite to the heating trolley, the heating trolley and the winding trolley are respectively slidably connected to the crossbeam, and the movement trajectory of the winding trolley is parallel to the movement trajectory of the heating trolley.

8. The gas cylinder heating device according to claim 7, characterized in that: The heating trolley is provided with a support frame which can move up and down. The support frame is rotatably connected to a support seat through a connecting rod, and the support seat is fixedly connected to the heating head.

9. A method for using a gas cylinder heating device, characterized in that: Includes the following: S1. Preheat the winding tooling body and the liner, and heat the winding tooling body and the liner in an oven at 100°C for two hours; S2. Assemble the components, connect the hot air duct and the air pipe to the heated winding tooling body, extend the assembled air pipe into the cavity of the liner, and connect the winding tooling body to the liner with threads, clamp one end of the winding tooling body with the gantry chuck, and connect the other end of the liner to the tail top; S3. Wrap the gas cylinder, start the driving devices for driving the winding tool body to rotate and the heating trolley and the winding trolley to move respectively. While the gas cylinder rotates, the winding trolley and the heating trolley move along the axial and radial directions of the gas cylinder to complete the winding of the inner liner; while winding, turn on the heat source connected to the hot air duct and the heating head to heat the inner liner from the inside and outside respectively.

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