Alkali-free glass fiber cloth automatic winding process method

Abstract

The invention belongs to the field of low-temperature storage tanks of carrier rockets, and discloses an automatic alkali-free glass fiber cloth winding process method which comprises the following steps: S1, mounting storage tank rotating devices at the front bottom and the rear bottom of a low-temperature storage tank; s2, winding equipment is mounted on the AGV through threads; s3, the position of the AGV trolley is adjusted, so that the winding equipment meets the requirement of a winding station; s4, preparing pre-dipping glue; s5, the alkali-free glass fiber cloth roll is placed on a discharging mechanism of winding equipment; s6, winding alkali-free glass fiber cloth; s7, room-temperature curing or heating curing is conducted on the low-temperature storage box obtained after wet winding is completed; and S8, a storage box rotating device is started to rotate the storage box, and manufacturing of the protective layer is completed. The automatic winding machine can replace a traditional numerical control vertical or horizontal lathe type winding machine, is suitable for automatic winding of alkali-free glass fiber cloth of a large-length-diameter-ratio low-temperature storage box, and is high in construction efficiency, low in cost and good in winding quality.

Description

Technical Field

[0001] The invention belongs to the technical field of low-temperature storage tanks of launch vehicles, and in particular relates to an automatic winding process method for alkali-free glass fiber cloth. Background Art

[0002] Cryogenic launch vehicles all use liquid hydrogen / liquid oxygen, liquid oxygen / kerosene, and liquid oxygen / methane as propellants. Among them, the vaporization temperature of liquid oxygen is -183°C, the vaporization temperature of liquid hydrogen is -253°C, and the vaporization temperature of methane is -162°C. They are cryogenic propellants. In order to reduce evaporation and ensure the normal operation of the rocket engine, it is necessary to take insulation measures for the cryogenic tank to ensure that its temperature is within a certain range. After the construction of the insulation layer of the cryogenic tank in the prior art is completed, it is generally necessary to wet-wrap alkali-free glass fiber cloth on the outer surface of the insulation layer to improve the surface strength, insulation effect and service life of the insulation layer.

[0003] With the development of commercial aerospace, the size of cryogenic tanks is getting larger and larger, with a length generally exceeding tens of meters and a diameter generally exceeding 3 meters. The traditional horizontal or vertical lathe winding equipment is used to wind the alkali-free glass cloth, which requires a large investment in the equipment and is limited by the size of the winding equipment. It is not suitable for the winding of alkali-free glass fiber cloth for cryogenic tanks with a large aspect ratio. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an automatic winding process method for alkali-free glass fiber cloth, which has the advantages of high construction efficiency, low cost, good winding quality, etc. and is particularly suitable for the automatic winding of alkali-free glass fiber cloth for low-temperature storage tanks with a large aspect ratio.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An automatic winding process for alkali-free glass fiber cloth comprises the following steps:

[0007] S1, installing a tank rotating device at the front bottom and the rear bottom of the low-temperature tank; lifting the low-temperature tank horizontally and slowly lowering it so that the supporting rings of the tank rotating device installed at the front bottom and the rear bottom fall onto the supporting wheels of the active frame vehicle and the driven frame vehicle, and the supporting rings can be movably connected to the supporting wheels; the outer gear ring of the tank rotating device meshes with the driving gear of the active frame vehicle;

[0008] S2, install the wrapping equipment on the AGV trolley through threads, so that the wrapping working direction of the wrapping equipment is at a 90° angle to the traveling direction of the AGV trolley;

[0009] S3, adjust the position of the AGV trolley so that the winding equipment meets the requirements of the winding station. The horizontal distance between the winding equipment and the low-temperature storage tank is 1000-2000mm;

[0010] S4, preparing pre-impregnated adhesive, placing the low-temperature adhesive for winding in the adhesive tank of the winding equipment, and applying the adhesive to the winding tape;

[0011] S5, placing the alkali-free glass fiber cloth roll on the unwinding mechanism of the winding equipment, and passing the alkali-free glass fiber cloth tape through the guide roller, the tension control system, the dipping system and the squeezing system in sequence;

[0012] S6, winding alkali-free glass fiber cloth, starting from the starting point of the winding cloth belt, winding it three times, and then overlapping winding. At this time, the AGV trolley carrying the winding machine moves along the axis of the tank at a uniform speed. Every time the AGV trolley moves a certain distance, the tank rotates one circle along its circumference until the AGV trolley moves from the tank barrel section to the other end;

[0013] S7, curing the low-temperature storage box at room temperature or by heating after the wet winding is completed;

[0014] S8, during the curing process, the tank rotating device is turned on to rotate the tank to prevent the glue from flowing, thereby completing the manufacture of the protective layer.

[0015] Preferably, in S1, the cryogenic storage tank is driven by an AC servo reduction motor driving gear to perform uniform rotational motion along its circumference, with a rotation speed of 0.1-1 rpm.

[0016] Preferably, in S1, the thickness of the outer gear ring is 40-60 mm, and the thickness of the support ring is 20-40 mm.

[0017] Preferably, in S2, the cloth tape winding width of the winding equipment is 200-500 mm, the winding tension is 5-50 kg, the winding angle is -10° to 10°, and the deviation correction accuracy is ±0.5 mm.

[0018] Preferably, in S2, the AGV trolley moves in the axial direction of the low-temperature storage tank, and the AGV trolley carries the winding equipment to achieve uniform linear motion along the axial direction, with a running speed of 80 to 400 mm / min, a linear walking accuracy of ±5 mm, a climbing ability of ≥3.5°, and a power interface for the winding equipment is provided on the AGV trolley.

[0019] Preferably, in S4, the low-temperature glue is DW-3 glue, the operating temperature range is -269 to +60°C, and the shear strength is greater than 20MPa.

[0020] Preferably, in S6, the width of the alkali-free glass fiber cloth tape is in the range of 450 to 500 mm, the overlap distance is 20 to 30 mm, the winding tension is controlled at 10 to 30 kg, and the winding angle α=arctan[(L-L1) / πD], wherein L is the cloth tape width, L1 is the overlap distance, and D is the diameter of the tank.

[0021] Preferably, in S7, the room temperature curing conditions are a temperature not lower than 10° C., a relative humidity less than 75%, and curing for 48 hours.

[0022] Preferably, in S7, the heating and curing conditions are 60° C. for 8 hours, 100° C. for 2 hours, or 130° C. for 1 hour.

[0023] Preferably, in S8, the tank rotating device rotates at a speed of 0.2-0.5 rpm.

[0024] The present invention has the following advantages:

[0025] (1) The automatic winding process of alkali-free glass cloth for low-temperature storage tanks provided by the present invention uses a frame car to support the product to perform uniform circumferential motion + an AGV trolley to carry the winding equipment to perform uniform axial motion, which can replace the traditional CNC vertical or horizontal lathe-type winding machine. It can not only adapt to large-sized and large-aspect-ratio low-temperature storage tanks, but also avoid large equipment investment, and has the advantages of high construction efficiency and low cost.

[0026] (2) The present invention provides a method for automatically winding the alkali-free glass cloth for low-temperature storage tanks. When the alkali-free glass cloth is automatically wound by wet method, the tension is uniform and controllable and monitored in real time. After the winding is formed, there are no gaps or wrinkles, thereby improving the winding quality.

[0027] (3) The automatic winding process of the alkali-free glass cloth for the low-temperature storage tank provided by the present invention can realize the rotational solidification of the low-temperature storage tank with a large aspect ratio, and can ensure the uniformity of the DW-3 glue liquid, making its surface smooth and flat without the phenomenon of glue aggregation, glue deficiency, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the active frame vehicle of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the driven frame vehicle of the present invention;

[0031] Figure 4 It is a structural schematic diagram of the tank rotating device of the present invention;

[0032] Figure 5 It is a structural schematic diagram of the winding device of the present invention;

[0033] In the figure, 1, active frame; 11, frame; 12, wheel; 13, wheel fixing block; 14, weighing sensor; 15, support frame; 16, support seat; 17, support wheel; 18, handle; 19, driving mechanism; 191, AC servo reduction motor; 192, universal coupling; 193, driving gear; 194, screw lifting mechanism; 2, driven frame; 21, driven frame body; 22, driven frame wheel; 23, driven frame Wheel fixing block; 24, driven frame weighing sensor; 25, driven frame support frame; 26, driven frame support seat; 27, driven frame support wheel; 3, storage tank rotating device; 31, outer gear ring; 32, first support plate ring; 33, second support plate ring; 4, winding equipment; 41, unloading mechanism; 42, magnetic powder brake; 43, tension control sensor; 44, glue dipping mechanism; 45, glue squeezing mechanism; 5, AGV trolley 6, storage tank. DETAILED DESCRIPTION

[0034] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] Example 1

[0037] See also Figure 1 As shown: an automatic winding device for low-temperature tank alkali-free glass fiber cloth, comprising an active frame 1, a driven frame 2, a tank rotating device 3, a winding device 4, and an AGV trolley 5. The tank 6 is fixed to the active frame 1 and the driven frame 2 through the tank rotating device 3, and the winding device 4 is fixed to the AGV trolley 5. The AC servo reduction motor of the active frame 1 drives the tank rotating device 3 to realize the uniform rotation of the tank 6 along the circumferential direction, and the AGV trolley 5 carries the winding device 4 to make uniform linear motion along the axial direction of the tank, and together completes the winding of the alkali-free glass cloth.

[0038] See also Figure 2As shown: a wheel 12 is installed under the body 11 of the active frame vehicle 1, and the wheel is placed on the guide rail on the ground. The wheel 12 is fixed by a wheel fixing block 13 to prevent the vehicle body from sliding. A weighing sensor 14 is located between the vehicle body 11 and the support frame 15, and is used to weigh the weight of the protective layer. A support seat 16 is installed on the support frame 15 by bolts, and a support wheel 17 is installed on the support seat 16. The screw drive is driven by rotating the handle 18 to achieve horizontal position movement to meet the needs of tanks with different diameters. A driving mechanism 19 is installed between the vehicle body 11 and the support frame 15. The driving mechanism 19 includes an AC servo reduction motor 191, a universal coupling 192, a driving gear 193, and a screw lifting mechanism 194. The AC servo reduction motor 191, the universal coupling 192, and the driving gear 193 are connected in sequence, and the up and down movement of the driving mechanism is achieved through the screw lifting mechanism 194.

[0039] See also Figure 3 As shown: a wheel 22 is installed under the body 21 of the driven frame vehicle 2, the wheel is placed on a guide rail on the ground, the wheel 22 is fixed by a wheel fixing block 23, a weighing sensor 24 is located between the body 21 and the support frame 25, a support seat 26 is installed on the support frame 25 by bolts, a support wheel 27 is installed on the support seat 26, and a screw drive is driven by rotating a handle 28 to achieve horizontal position movement to meet the needs of tanks with different diameters.

[0040] See also Figure 4 As shown, the tank rotating device 3 includes an outer gear ring 31, a first support plate ring 32 and a second support plate ring 33. The outer gear ring 31 is installed on the first support plate ring 32 by screws. The first support plate ring 32 is installed on the front bottom end frame of the tank 6 by bolt connection. The second support plate ring 33 is installed on the rear bottom end frame of the tank 6 by bolt connection. The outer gear ring 31 of the tank rotating device 3 is meshed with the driving gear 193 of the active frame vehicle 1. The first support plate ring 32 is supported on the support wheel 17 of the active frame vehicle 1, and the second support plate ring 33 is supported on the support wheel 27 of the driven frame vehicle 2, so that the tank 6 can rotate at a uniform speed along its circumferential direction through the driving mechanism 19.

[0041] See also Figure 5 As shown: the winding device 4 includes a feeding mechanism 41, a magnetic powder brake 42, a tension control sensor 43, a glue dipping mechanism 44, and a glue squeezing mechanism 45. The feeding mechanism 41 on the winding device is used to place the material roll, the magnetic powder brake 42 is installed at one end of the feeding mechanism 41, the tension control sensor 43 is installed on the guide roller, the glue dipping mechanism 44 is used to dip DW-3 glue, and the glue squeezing mechanism 45 is used to control the thickness of the glue layer; the winding device 4 is installed on the AGV trolley 5 by bolt connection, and the AGV trolley 5 carries the winding device 4 to perform uniform linear motion along the axial direction of the tank.

[0042] In this embodiment, the tank 6 is driven by the tank rotating device 3 to perform uniform rotational motion along its circumferential direction, and the rotational motion speed is controlled within a range of 0.1 to 1 rpm.

[0043] In this embodiment, the thickness of the outer gear ring 31 of the tank rotating device 3 is in the range of 30-40 mm, and the thickness of the supporting plate ring is in the range of 30-40 mm.

[0044] In this embodiment, the winding equipment can realize the winding of cloth tape with a width of 200 to 500 mm, the winding tension control range is 5 to 50 kg, the winding angle control range is -10° to 10°, and the correction accuracy is ±0.5 mm.

[0045] In this embodiment, the moving direction of the AGV trolley 5 is the axial direction of the low-temperature storage tank. The AGV trolley 5 carries the winding equipment 4 to achieve uniform linear motion along the axial direction. The running speed is controlled at 80-400 mm / min, the linear walking accuracy is ±5 mm, the climbing ability is ≥3.5°, and there is a power interface for the winding equipment 4 on the AGV trolley 5.

[0046] Example 2

[0047] The following will refer to Figure 1-Figure 5 The process of the present invention is described in detail with an automatic winding device for alkali-free glass fiber cloth for a low-temperature storage tank.

[0048] An automatic winding process for alkali-free glass fiber cloth comprises the following steps:

[0049] Step S1, installing a support ring 22 and an outer gear ring 21 on the front bottom of the cryogenic storage tank, installing a support ring 23 on the rear bottom, lifting the cryogenic storage tank horizontally, and slowly lowering it, so that the support ring 22 installed on the front bottom falls onto the support wheel 113 of the master vehicle 11, and the support ring 23 installed on the rear bottom falls onto the support wheel 121 of the slave vehicle 12, and ensuring that the outer gear ring 21 installed on the front bottom support ring 22 is meshed with the driving gear 112 of the master vehicle 11;

[0050] Install the tank rotating device 3 at the front bottom and the rear bottom of the low-temperature tank 6, lift the low-temperature tank horizontally, and slowly lower it so that the supporting rings 32 of the tank rotating device installed at the front bottom and the rear bottom both fall onto the supporting wheels 17 of the active frame 1 and the supporting wheels 27 of the driven frame 2, and ensure that the outer gear ring 31 of the tank rotating device at the front bottom of the low-temperature tank is meshed with the driving gear 193 of the active frame;

[0051] Step S2, the winding device 4 is installed on the AGV trolley 5 by means of threads, so that the winding working direction of the winding device 4 forms an angle of 90° with the traveling direction of the AGV trolley 5;

[0052] Step S3, adjust the position of the AGV trolley 5 so that the winding device 4 meets the requirements of the winding station, and the distance between the winding device and the low-temperature storage tank is 1500mm;

[0053] Step S4, preparing pre-impregnated adhesive, placing the low-temperature adhesive DW-3 for winding in the impregnation mechanism 44 of the winding equipment for impregnation of the winding tape;

[0054] Step S5, placing the alkali-free glass fiber cloth roll on the unloading mechanism 41 of the winding device 4, and passing the alkali-free glass fiber cloth tape through the tension control system 43, the dipping system 44 and the glue squeezing mechanism 45 in sequence, the width range of the winding cloth tape is 450 mm, the overlap distance is 30 mm, the winding tension control range is 25 kg, the winding angle is set to 2°, and the calculation formula is: α=arctan[(L-L1) / πD]=arctan[(450-30) / (3.14×3800)]=2°;

[0055] Step S6, winding the alkali-free glass cloth, starting from the starting position of the winding cloth tape and winding three times, and then performing overlapping winding, the AGV trolley 5 carrying the winding device 4 performs uniform linear motion along the axial direction of the tank, and the operating speed is 84mm / min. Every time the AGV trolley 5 moves a certain distance, the tank rotates one circle along its circumference, and the rotation speed is 0.2rpm, until the AGV trolley 5 moves from the tank barrel section to the other end;

[0056] Step S7, placing the low-temperature storage box 6 after wet winding at room temperature for curing. The room temperature curing conditions are that the temperature is not less than 10° C., the relative humidity is less than 75%, and the curing takes 24 hours.

[0057] Step S8, during the curing process, the tank rotating device 3 is turned on and the rotating speed is controlled to be 0.3 rpm to prevent the glue from flowing, thereby completing the manufacture of the protective layer.

[0058] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An automatic winding process for alkali-free glass fiber cloth, characterized in that: The following steps are involved: S1, installing a tank rotating device at the front bottom and the rear bottom of the low-temperature tank; lifting the low-temperature tank horizontally and slowly lowering it so that the supporting rings of the tank rotating device installed at the front bottom and the rear bottom fall onto the supporting wheels of the active frame vehicle and the driven frame vehicle, and the supporting rings can be movably connected to the supporting wheels; the outer gear ring of the tank rotating device meshes with the driving gear of the active frame vehicle; S2, install the wrapping equipment on the AGV trolley through threads, so that the wrapping working direction of the wrapping equipment is at a 90° angle to the traveling direction of the AGV trolley; S3, adjust the position of the AGV trolley so that the winding equipment meets the requirements of the winding station. The horizontal distance between the winding equipment and the low-temperature storage tank is 1000-2000mm; S4, preparing pre-impregnated adhesive, placing the low-temperature adhesive for winding in the adhesive tank of the winding equipment, and applying the adhesive to the winding tape; S5, placing the alkali-free glass fiber cloth roll on the unwinding mechanism of the winding equipment, and passing the alkali-free glass fiber cloth tape through the guide roller, the tension control system, the dipping system and the squeezing system in sequence; S6, winding alkali-free glass fiber cloth, starting from the starting point of the winding cloth belt, winding it three times, and then overlapping winding. At this time, the AGV trolley carrying the winding machine moves along the axis of the tank at a uniform speed. Every time the AGV trolley moves a certain distance, the tank rotates one circle along its circumference until the AGV trolley moves from the tank barrel section to the other end; S7, curing the low-temperature storage box at room temperature or by heating after the wet winding is completed; S8, during the curing process, the tank rotating device is turned on to rotate the tank to prevent the glue from flowing, thereby completing the manufacture of the protective layer.

2. The automatic winding process of alkali-free glass fiber cloth according to claim 1 is characterized in that: In S1, the cryogenic storage tank is driven by the AC servo reduction motor driving gear to perform uniform rotational motion along its circumference, with a rotation speed of 0.1-1 rpm.

3. The automatic winding process of alkali-free glass fiber cloth according to claim 2 is characterized in that: In S1, the thickness of the outer gear ring is 40-60 mm, and the thickness of the support ring is 20-40 mm.

4. The automatic winding process of alkali-free glass fiber cloth according to claim 1 is characterized in that: In S2, the cloth tape winding width of the winding equipment is 200-500 mm, the winding tension is 5-50 kg, the winding angle is -10° to 10°, and the deviation correction accuracy is ±0.5 mm.

5. The automatic winding process of alkali-free glass fiber cloth according to claim 1 is characterized in that: In S2, the AGV trolley moves in the axial direction of the low-temperature storage tank. The AGV trolley carries the winding equipment to achieve uniform linear motion along the axial direction. The operating speed is 80-400mm / min, the linear walking accuracy is ±5mm, the climbing ability is ≥3.5°, and there is a power supply interface for the winding equipment on the AGV trolley.

6. The automatic winding process of alkali-free glass fiber cloth according to claim 1 is characterized in that: In S4, the low-temperature glue is DW-3 glue, the operating temperature range is -269 to +60°C, and the shear strength is greater than 20MPa.

7. The automatic winding process of alkali-free glass fiber cloth according to claim 1 is characterized in that: In S6, the width of the alkali-free glass fiber tape is in the range of 450 to 500 mm, the overlap distance is 20 to 30 mm, the winding tension is controlled at 10 to 30 kg, and the winding angle α=arctan[(L-L1) / πD], where L is the tape width, L1 is the overlap distance, and D is the diameter of the tank.

8. The automatic winding process of alkali-free glass fiber cloth according to claim 1 is characterized in that: In S7, the room temperature curing conditions are a temperature not lower than 10° C., a relative humidity lower than 75%, and curing for 48 hours.

9. The automatic winding process of alkali-free glass fiber cloth according to claim 1 is characterized in that: In S7, the heating and curing conditions are: curing at 60°C for 8 hours, curing at 100°C for 2 hours, or curing at 130°C for 1 hour.

10. The automatic winding process of alkali-free glass fiber cloth according to claim 1, characterized in that: In S8, the tank rotating device rotates at a speed of 0.2-0.5 rpm.

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