Super-large-span high-pressure inflatable hangar system

Abstract

The ultra-large-span high-pressure inflatable hangar system is used for parking airplanes and comprises a hangar body, two eyelid type gates and tarpaulin, and the two eyelid type gates are located on the two sides of the hangar body respectively; the hangar main body comprises a plurality of vertical supporting air ribs which are arranged at intervals; the eyelid type gate comprises a plurality of inclined supporting air ribs arranged at intervals and a gate driving assembly, a hinge support is arranged at the bottoms of the inclined supporting air ribs, and the hinge support comprises a hinge support, a heightening seat and a second rack; opening and closing of the gate are achieved in the mode that the gate driving assembly drives the multiple inclined supporting air ribs to rotate, and when the gate is in a closed state, the inclined angles of the inclined supporting air ribs are different. The diameter of the air rib reaches 1700 mm and is far larger than that of an existing air rib in the prior art, and the building requirement of a large hangar can be met; meanwhile, the invention provides an air rib production process in a targeted manner, the process is advanced, and the production requirements of large-diameter air ribs can be met.

Description

Technical Field

[0001] The present invention relates to the field of hangars, and in particular to an ultra-large-span high-pressure inflatable hangar system. Background Art

[0002] Hangars can protect parked aircraft from the sun, rain, and snow, and can also serve as a shelter to conceal them. Fixed hangars can accommodate large aircraft, but they cannot accommodate maneuverable aircraft. Inflatable hangars exist in the prior art, but their small spans prevent them from accommodating large-wingspan aircraft. Furthermore, when their spans are increased, their strength also fails to meet operational requirements. Furthermore, hangar doors must function as a part of the hangar to ensure normal opening and closing, while also ensuring the integrity and safety of the ultra-large-span, high-pressure, inflatable hangar structure. However, the existing door structure design is difficult to meet performance and strength requirements for ultra-large-span, high-pressure, inflatable hangars due to their large size and weight. Summary of the Invention

[0003] The present invention aims to provide an ultra-large-span high-pressure inflatable hangar system, which makes the hangar system easy to maneuver and the hangar door can be opened and closed conveniently and stably. The entire hangar system has high strength, large span, and long service life, which can meet the parking needs of large-wingspan aircraft.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] An ultra-large-span, high-pressure, inflatable hangar system for parking aircraft, characterized by comprising a hangar body, eyelid-type doors, and a tarpaulin. The eyelid-type doors are two leaves, one located on either side of the hangar body; the tarpaulin is used to cover the hangar body and the eyelid-type doors; the hangar body includes a plurality of spaced-apart vertical support air ribs, each having a clamping fixture provided at its bottom, the vertical support air ribs being connected to a first frame via the clamping fixture;

[0006] The eyelid-type gate includes a plurality of spaced-apart oblique supporting air ribs and a gate drive assembly. The structure of the oblique supporting air ribs is the same as that of the vertical supporting air ribs. A hinged bracket is provided at the bottom of the oblique supporting air ribs. The hinged bracket includes a hinged support, a raised seat, and a second frame. The bottom of the oblique supporting air ribs is connected to the hinged support, the bottom of the hinged support is hinged to the raised seat, and the raised seat is fixed to the second frame.

[0007] The door is opened and closed by the door drive assembly driving the rotation of multiple inclined support air ribs. When the door is in the closed state, the inclined support air ribs have different inclination angles, and the hinged supports connected to the inclined support air ribs are in contact with the ground at the end away from the hangar body, which is used to support the inclined support air ribs.

[0008] The air ribs include the vertical supporting air ribs and the oblique supporting air ribs, and the air ribs are filled with high-pressure gas; an outer covering pipe is arranged outside the air ribs, and a plurality of connection nodes are arranged on the outer covering pipe.

[0009] Optionally, the different inclination angles of each inclined supporting air rib are achieved in the following manner, that is, the hinged support structure of each inclined supporting air rib is the same, but the height of each raised seat is different, and the height of each raised seat decreases successively from away from the hangar body to close to the hangar body.

[0010] Optionally, the different inclination angles of each inclined supporting air rib are achieved in the following manner, that is, the heights of the raising seats used for each inclined supporting air rib are the same, but the sizes of the articulated supports are different. When the articulated supports are tilted, the distance between one end of each articulated support supported on the ground and its hinge point increases successively from away from the hangar body to closer to the hangar body.

[0011] Optionally, the gate drive assembly reel and the bearing seats at both ends of the support reel are connected to connecting shafts at both ends of the reel, wherein the connecting shaft at one end is connected to a handwheel and is manually driven by the handwheel, and the connecting shaft at the other end is connected to a reducer and a motor and is electronically driven by the motor; a steel wire rope is wound around the reel, and a pulley group is provided on multiple vertical supporting air ribs and inclined supporting air ribs near the gate, and the pulley group is connected to the steel wire rope.

[0012] Optionally, wind-resistant cables are provided on both sides of each vertical supporting air rib and the oblique supporting air rib, and the wind-resistant cables are fixed to both sides of the hangar through an anchoring system, and the wind-resistant cables on both sides of the hangar form a mesh structure; the anchoring system includes spiral piles, expansion bolts or counterweights.

[0013] Optionally, the diameter of the air rib is 1700mm; multiple groups of transverse supporting air ribs are arranged between two adjacent vertical supporting air ribs, transverse supporting air rib outer wrapping tubes are arranged outside the transverse supporting air ribs, and multiple connection nodes are arranged on the transverse supporting air rib outer wrapping tubes. The transverse supporting air ribs are firmly connected to the vertical supporting air ribs through the connection nodes arranged on the transverse supporting air rib outer wrapping tubes and the vertical supporting air rib outer wrapping tubes; the diameter of the transverse supporting air ribs is 630mm.

[0014] Optionally, the air rib is composed of an external woven tube and an internal air-sealing membrane, and the external woven tube is made of polyethylene nanomaterial. The weaving process of the external woven tube includes: twisting multiple strands of polyethylene nanomaterial filaments and fixing them into a polyethylene nanomaterial thread, weaving with a square plain weave, 2 up and 2 down, based on the plain weave, and weaving with the weaving points extended along the warp and weft directions.

[0015] Optionally, the air-sealing membrane is made of TPU material, and the air rib laminating process includes: coating the outside of the internal air-sealing membrane with adhesive and then inserting it into the external woven tube, sealing the two ends of the internal air-sealing membrane and the external woven tube and filling them with steam, and the internal air-sealing membrane and the adhesive are bonded to the external woven tube under the action of high-temperature steam for lamination.

[0016] Optionally, the manufacturing process of the air rib includes: twisting → splicing → twisting → winding → spacer ring → threading the warp → threading the weft → test run → weaving → cutting → edge sealing → gluing → laminating; the specific steps are:

[0017] ① Twisting

[0018] After the 1600D yarn enters the workshop, it is checked for count and single-filament physical indicators are tested. Only after passing the test can it be put into production.

[0019] ②Splicing line

[0020] The warp and weft yarns have 11 strands in total, and the strands are evenly wound and distributed on the surface of the bobbin without overlapping, and the number of strands of yarn in the whole bobbin is consistent.

[0021] ③Twisting

[0022] The twist of the yarn used for the air rib structure is 30 to 500 Tml, and the yarn is twisted according to the twist requirements.

[0023] ④Spinning

[0024] Control the winding regulator's automatic tube changing mechanism and the end-break automatic stop mechanism to rewind the twisted weft yarn into a size that matches the circular loom shuttle, so as to be suitable for subsequent circular weaving production.

[0025] ⑤ Spacer ring

[0026] Install appropriate spacer rings according to the diameter of the air rib structure to be woven.

[0027] ⑥ Threading the warp

[0028] Place the semi-finished product from the previous step on the creel of the circular loom, and introduce the warp threads on the creel into the yarn collector through the porcelain holes on the rear support and the front support in parallel to avoid crossing, and then regularly pass through the guide, and then pass through the wire hole on the top of the jumper, and then alternately pass through the holes on the inner and outer wire palms, and finally pass through the channel ring and introduce into the sizing spacer ring; use a woven strip to roll onto the winding machine, pass one end through the traction roller, pull down all the warp threads between the sizing spacer rings and connect them to the strip head, adjust the tension so that all jumpers are in the same position.

[0029] ⑦ Weft threading

[0030] Spread the warp threads, install a pick in the shuttle, introduce the weft threads into the roller groove through the guide pin, hold the weft thread end, start the machine to rotate the shuttle 90° and then conduct the subsequent weaving test run.

[0031] ⑧Test run

[0032] Start the machine, make sure the shuttle is running normally, and start formal weaving after the jumper is in the right position.

[0033] ⑨Weaving

[0034] The weaving method of loop-holding and retracting needles is adopted, and a computer flat knitting machine is used for forming weaving. The three-dimensional geometric shape is unfolded into a two-dimensional graphic. The number of working needles and the retracting and retracting needle process of the weaving are accurately determined according to the unfolded two-dimensional graphic, so that the woven fabric completely conforms to the cylindrical shape; L-shaped and U-shaped tube weaving is adopted.

[0035] ⑩Cutting and edge banding

[0036] According to the size of the gas rib after overall forming, the fixed-length external woven tube is cut from the braiding machine, and the edges of the external woven tube are sealed with a webbing.

[0037] Optionally, the outer covering tube is processed into a tube shape using a high-strength base cloth, and a plurality of continuous reinforcing belts are provided on the outer covering tube; the external span of the hangar system is greater than 60m, and the height is greater than 25m. When the hangar is in the open state, the net length of the hangar is greater than 60m; the number of the vertical supporting air ribs is 15; the number of the oblique supporting air ribs on both sides of the gate is 3 respectively.

[0038] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0039] 1. The air rib of the present invention consists of an outer woven tube and an inner air-sealing membrane. The inner air-sealing membrane can be made by injection molding, and the outer woven tube is woven by a circular loom. The diameter of the air rib is 1700 mm and the length is 110 m. The largest three-dimensional weaving technology in the field of air ribs currently has a maximum diameter of 630 mm. The air rib production process of the present invention is ahead of the existing technology and can meet the production needs of ultra-long and ultra-large diameter air ribs. Compared with the existing technology, the present invention is also the only one that uses ultra-high molecular weight polyethylene material to weave the woven tube.

[0040] 2. The present invention designs an eyelid-type door, which is driven to open or close by electric or manual means, and is very convenient. At the same time, in order to adapt to the inclination angle requirements of different oblique support air ribs, a unique hinged bracket structure is designed. Through the differential design of the heightening seat or the hinged support, the hinged bracket can meet the different inclination requirements of the oblique support air ribs. After the door is closed, one end of the hinged support can be supported on the ground to bear part of the lateral force generated by the inclination of the oblique support air ribs, avoiding all lateral forces being borne by the wire rope and the cable, preventing stress concentration on the air ribs and increasing the service life of the air ribs. In addition, the support of the hinged support of the present invention can also improve the windproof performance and stability of the hangar system. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0042] Figure 1 This is a schematic diagram of the overall structure of the ultra-large span high-pressure inflatable hangar system;

[0043] Figure 2 Schematic diagram of the structure of the articulated bracket;

[0044] Figure 3 for Figure 1 An enlarged view of the structure at A in the middle (some parts are not shown);

[0045] Figure 4 It is a structural diagram of the connection between the first frame and the clamping fixture;

[0046] Figure 5 This is a schematic diagram of the structure of the gate drive assembly;

[0047] Figure 6 It is a structural diagram of the connection between the pulley block and the wire rope;

[0048] Figure 7 It is a schematic diagram of the knitting shape of an L-shaped tubular knitted fabric;

[0049] Figure 8 Schematic diagram of the yarn laying sequence of an L-shaped tubular knitted fabric, where (a) is an enlarged view of the narrowing position and (b) is an enlarged view of the widening position;

[0050] Figure 9 Schematic diagram of plain, twill and basket weave;

[0051] Figure 10 This is a schematic diagram of the external woven tube pattern;

[0052] Figure 11 This is the stress cloud diagram of 1700mm air rib (internal pressure 200kPa);

[0053] Figure 12 This is the strain cloud diagram of 1700mm air rib (internal pressure 200kPa);

[0054] Figure 13 This is the stress cloud diagram of 1700mm air rib (internal pressure 800kPa);

[0055] Figure 14 This is the strain cloud diagram of 1700mm air rib (internal pressure 800kPa); DETAILED DESCRIPTION

[0056] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0057] Example 1

[0058] like Figure 1-4 As shown, this embodiment provides an ultra-large span high-pressure inflatable hangar system for parking aircraft, including a hangar body 1, eyelid-type doors and a tarpaulin. The eyelid-type doors are two leaves, which are respectively located on both sides of the hangar body 1; the tarpaulin is used to cover the hangar body 1 and the eyelid-type doors, and the hangar body 1 includes multiple vertical supporting air ribs 2, preferably 15; the vertical supporting air ribs 2 are vertical supporting structures, and the bottom of the vertical supporting air ribs 2 is provided with a clamping fixture 3, and by using the clamping fixture 3, the bottom of the vertical supporting air ribs 2 can be connected to the first frame 4 fixed on the ground; multiple vertical supporting air ribs 2 are arranged at intervals to jointly build the hangar body 1 structure.

[0059] The eyelid-type gate includes a plurality of oblique supporting air ribs 5 arranged at intervals and a gate drive assembly 6. The structure of the oblique supporting air ribs 5 is the same as that of the vertical supporting air ribs 2. A hinged bracket 7 is provided at the bottom of the oblique supporting air ribs 5. The hinged bracket 7 includes a hinged support 71, an elevated seat 72 and a second frame 73. The bottom of the oblique supporting air ribs 5 is connected to the hinged support 71, and the bottom of the hinged support 71 is hinged to the elevated seat 72. The elevated seat 72 is fixed to the second frame 73 by bolts. In the specific implementation process, an outer sheathing tube is provided on the outside of the vertical supporting air ribs 2 and the oblique supporting air ribs 5, and a plurality of connection nodes are provided on the outer sheathing tube for realizing connection with other components. More specifically, the air ribs include vertical supporting air ribs 2 and oblique supporting air ribs 5, and the inside of the air ribs is filled with high-pressure gas, such as high-pressure air.

[0060] When the eyelid-type door is closed, the inclined support air ribs 5 rotate and tilt towards the side away from the hangar main body 1. After the door reaches the closed position, the inclination angles of the multiple inclined support air ribs 5 are different, and the near-ground ends of each hinge support 71 can be supported on the ground to realize the support and positioning of the connected inclined support air ribs 5. Specifically, to make the inclination angles of the multiple inclined air ribs different, the sizes of the multiple heightening seats 72 can be designed differently. That is, the hinge supports 71 of each inclined support air rib 5 have the same structure, but the heights of each heightening seat 72 are different. In specific implementation, in the direction from away from the hangar main body 1 to close to the hangar main body 1, the heights of the heightening seats 72 decrease in sequence. Another implementation manner (not shown in the figure) can also be adopted, that is, the heights of the heightening seats 72 for each inclined support air rib 5 are the same, but the sizes of the hinge supports 71 are different. When the hinge supports 71 tilt, in the direction from away from the hangar main body 1 to close to the hangar main body 1, the distances from the ends of each hinge support 71 supported on the ground to their hinge points increase in sequence.

[0061] The following takes three inclined support air ribs 5 as an example for specific illustration. The first heightening seat 721, the second heightening seat 722, and the third heightening seat 723 are arranged away from the hangar main body 1 in sequence. The first hinge support 711, the second hinge support 712, and the third hinge support 713 have the same structure. The height of the first heightening seat 721 is H1, the height of the second heightening seat 722 is H2, and the height of the third heightening seat 723 is H3, and H1 < H2 < H3. When the door is closed, the right sides of the first to third hinge supports are all supported on the ground to realize the support and positioning of each inclined support air rib 5.

[0062] As Figure 5 shown, in order to provide multiple driving mode selections, the driving modes of the door driving component 6 include electric control and manual forms. The door driving component 6 includes a reel 61 and bearing seats 62 supporting both ends of the reel 61. Both ends of the reel 61 are connected with connecting shafts 63. One of the connecting shafts 63 is connected with a handwheel 64 and is manually driven by the handwheel 64. The other connecting shaft 63 is connected with a reducer and a motor 65 and is electrically controlled and driven by the motor 65. To keep the door driving component 6 stable, the door driving component 6 is fixedly installed on the mounting frame and is connected with the first rack 4 of the hangar main body 1 in a bolted form. A steel wire rope is wound on the reel 61. Multiple vertical support air ribs 2 and inclined support air ribs 5 close to the door are provided with a pulley block composed of multiple pulleys 8, and the pulley block is connected with the steel wire rope 9 as Figure 6As shown, the specific configuration of the pulley assembly and wire rope 9 belongs to the prior art and will not be repeated here. Driven by the motor 65 or handwheel 64, the reel 61 drives the wire rope 9, which in turn drives the inclined support air rib 5 to rotate around the rotating shaft on the raised seat 72, changing from an inclined state to an upright state, completing the opening of the gate. Similarly, when the motor 65 or handwheel 64 is reversed, the inclined support air rib 5, under the action of its own weight, changes from an upright state to an inclined state, completing the closing of the gate. During the process of opening or closing the gate, the pulleys on the multiple vertical support air ribs 2 near the gate distribute the force generated by the closing or opening of the gate, thereby reducing the reaction force borne by the outermost vertical support air rib 2 and increasing the service life of the outermost vertical support air rib 2.

[0063] like Figure 1 As shown, in order to further enhance the wind resistance of the overall structure of the hangar, wind-resistant cables 10 are set on both sides of each vertical supporting air rib 2 and the oblique supporting air rib 5. The wind-resistant cables 10 are fixed to both sides of the hangar through an anchoring system. The wind-resistant cables 10 are made of stainless steel wire ropes. The wind-resistant cables 10 on both sides of the hangar form a mesh structure; the anchoring system includes spiral piles, expansion bolts or counterweights.

[0064] It needs to be further explained that, Figure 1 As shown, multiple groups of transverse supporting air ribs 11 are arranged between two adjacent vertical supporting air ribs 2, preferably 5 groups; the transverse supporting air ribs 11 are made of air ribs with a diameter of 630 mm, and a transverse supporting air rib 11 outer wrapping tube is arranged on the outside of the transverse supporting air rib 11, and multiple connection nodes are arranged on the transverse supporting air rib 11 outer wrapping tube. The transverse supporting air rib 11 and the vertical supporting air rib 2 are firmly connected by the connection nodes arranged on the transverse supporting air rib 11 outer wrapping tube and the vertical supporting air rib 2 outer wrapping tube, which can reduce the rollover force between the vertical supporting air ribs 2, thereby improving the stability of the overall supporting structure.

[0065] Example 2

[0066] On the basis of Example 1, this embodiment further designs and explains the structure and process of the air rib. The vertical support air rib 2 and the oblique support air rib 5 are made of the same material and process. Specifically, the air rib is composed of an external woven tube and an internal air-sealing membrane, and the external woven tube and the internal air-sealing membrane are compounded together to form a high-pressure air rib. More specifically, the external woven tube material of the commonly used air rib is mainly polyester filament fiber, which cannot meet the design requirements of the ultra-large span hangar air rib of the present invention. After material comparison, lightweight and high-strength polyethylene nanomaterials are selected for weaving the external woven tube; the external woven tube is woven on a circular loom, and the silk threads are woven into cylindrical woven tubes of various diameters by means of the circular loom using the warp and weft to cross-weave each other; the diameter of the high-pressure air rib in the present invention can reach 1700mm, and the hangar is an arched structure after forming. The weaving shape of the external woven tube is required to be similar to the L-type and U-type. The three-dimensional diagram and two-dimensional unfolding diagram (front needle bed weaving part) of the L-shaped tubular knitted fabric are shown in the figure. Figure 7 As shown in the figure; when knitting L-shaped tubular fabrics, if there is no retractable needle, the yarn guide is usually used to alternately pad the yarn on the front and rear needle beds, that is, the padding order is front, back, front, back, and so on, forming a closed straight fabric. When knitting the loop-type retractable needle bend, it should be noted that the padding order should be front, back, back, front, as shown in the figure. Figure 8 As shown, the loops are repeated sequentially, resulting in the front and back pieces of the fabric being connected only on one side, leaving them unconnected at the receiving and releasing needles. This ensures that the tubular shape can be smoothly formed at the receiving and releasing needles. The knitting principle for a U-shaped tubular knitted fabric is similar to that for an L-shaped fabric. After completing the above L-shaped fabric, another section of the fabric is knitted in the same direction as the L-shaped corner to complete the U-shaped tubular fabric.

[0067] It should be pointed out that the maximum fineness of mature silk products is 178tex polyethylene nanomaterial filament, and its breaking strength is 498.3N. The filament of this fineness cannot meet the use requirements and needs to be processed by twisting process, that is, multiple strands of commonly used polyethylene nanomaterial filaments are twisted and fixed into a stronger polyethylene nanomaterial thread, which is used as the material of the outer woven tube of the air rib of the present invention; according to the requirements of the diameter, warp and weft density, strength, etc. of the air rib, combined with the fineness of the air rib base cloth fiber, a square weave (2 up and 2 down) is adopted, such as Figure 9 As shown. Based on the plain weave, the weaving points are extended along the warp and weft directions. If the traditional plain weave is used, although the wear resistance is good, the density of the woven tube cannot meet the design strength requirements. 2 up 2 down can increase the density of the warp and weft to meet the design strength requirements. The external woven tube texture is as follows Figure 10 shown.

[0068] The operating environment temperature of the hangar system of the present invention spans a wide range from subzero to above zero. The air-sealing membrane inside the air rib needs to meet the requirement of normal use at relatively low temperatures. At the same time, the pressure retention of the air rib mainly depends on the airtightness of the internal air-sealing membrane. Therefore, the material of the air-sealing membrane needs to have good low-temperature resistance and good airtightness. TPU material has a small diffusion coefficient and a relatively small permeability coefficient, is resistant to low temperatures, and has high elasticity and can withstand certain tensile loads. The present invention uses TPU as the air-sealing membrane of the air rib; more specifically, the airtightness of the air rib depends on the internal air-sealing membrane and the laminating technology of the air rib. The present invention adopts the method of coating the external surface of the internal air-sealing membrane with adhesive and then inserting it into the external woven tube. The internal air-sealing membrane and the external woven tube are sealed and filled with steam at both ends. Under the action of high-temperature steam, the internal air-sealing membrane and the adhesive are bonded to the external woven tube for lamination.

[0069] It should be further explained that the production process of air ribs includes: twisting → splicing → twisting → winding → spacer ring → threading the warp → threading the weft → test run → weaving → cutting → edge sealing → gluing → laminating; the specific steps are:

[0070] ① Twisting

[0071] After the 1600D yarn enters the workshop, the quality inspector will check its count and test the physical indicators of the single yarn. Only after passing the test can it be put into production, 17750m / spool.

[0072] ②Splicing line

[0073] The warp and weft yarns are generally 11 strands in total, and the strands are required to be evenly wound and distributed crosswise on the surface of the bobbin without overlapping, and the number of strands of yarn in the entire bobbin is consistent.

[0074] ③Twisting

[0075] The twist of the ply yarn used in the air rib structure is 30~500Tml. It is twisted according to the twist requirements. During the twisting process, attention must be paid to checking the operating status of the feeding mechanism, the end-break automatic stop device and the tension device.

[0076] ④Spinning

[0077] It mainly controls the automatic tube changing mechanism of the winding regulator and the end-break automatic stop mechanism to rewind the twisted weft yarn into a size that matches the shuttle of the circular loom, so as to be suitable for subsequent circular weaving production.

[0078] ⑤ Spacer ring

[0079] Install appropriate spacer rings according to the diameter of the air rib structure to be woven.

[0080] ⑥ Threading the warp

[0081] The semi-finished product from the previous process is placed on the creel of the circular loom. The warp threads on the creel are then introduced into the yarn collector through the porcelain holes on the rear and front supports in parallel, avoiding crossover. The warp threads are then regularly threaded into the guide, passed through the wire holes at the top of the jumper, and then alternately through the holes in the inner and outer wire ropes. Finally, they are passed through the channel ring and into the sizing spacer rings. A woven strip is wound onto the winder, one end of which is passed through the pull roller. The warp threads between the sizing spacer rings are pulled down and connected to the strip head. The tension should be adjusted to ensure that all jumpers are in the same position.

[0082] ⑦ Weft threading

[0083] Spread the warp threads, install a brazing rod (weft tube) in the shuttle, introduce the weft threads into the roller groove through the guide pin, hold the weft thread end, start the machine to rotate the shuttle 90° and then conduct the subsequent weaving test run.

[0084] ⑧Test run

[0085] Start the machine, make sure the shuttle is running normally, and start formal weaving after the jumper is in the right position.

[0086] ⑨Weaving

[0087] The invention employs a loop-type retractable and retractable knitting method, using a computerized flat knitting machine for shaping. Three-dimensional geometric shapes are unfolded into two-dimensional patterns. The number of working needles and the retractable and retractable knitting process are accurately determined based on the unfolded two-dimensional pattern, ensuring that the woven fabric conforms perfectly to the cylindrical shape. The air ribs of the invention are formed into an arched structural support. The knitting shape is required to be similar to an L- or U-shaped shape, so L- and U-shaped tubular materials are used for weaving.

[0088] ⑩Cutting and edge banding

[0089] According to the size of the air rib after overall forming, the fixed-length external woven tube is cut from the braiding machine. The cut edges will be fuzzy and unthreaded, so the edges of the external woven tube are sealed with webbing.

[0090] Glue coating

[0091] Apply adhesive to the outside of the air-sealing membrane of the air rib.

[0092] Lamination

[0093] The airtight film coated with adhesive on the outside is put into the outer woven tube, the inner film and both ends of the woven tube are sealed and filled with steam, and the inner film and adhesive are bonded to the outer woven tube under the action of high-temperature steam to perform the lamination process.

[0094] The hangar in the present invention has an external span greater than 60 meters and a height greater than 25 meters. When the hangar is in the open state, the net length of the hangar is greater than 60 meters. This large hangar has high requirements for the overall structural strength of the air ribs. To further verify and illustrate that the air ribs manufactured using the materials and processes of the present invention can meet the use requirements of the ultra-large span high-pressure inflatable hangar of the present invention, finite element simulation analysis and verification of the air ribs are performed below.

[0095] Specifically, a finite element simulation model was established based on the arch structure size of the air rib. The air rib simulation model was established in ANSYS. The boundary conditions were set as the air rib clamp fixed. The operating pressure safety factor of the wrinkling moment of the single air rib was required to be no less than 4. Therefore, under the action of internal pressures of 200kPa and 800kPa respectively, a three-point bending load method was used to apply the lifting force at three points, and the load was gradually applied for simulation analysis. Figure 11-12 As shown in Figure 1, the internal pressure of the air rib is 200 kPa, the load weight of a single node is 756 kg, the total load weight is 2268 kg, the maximum stress of the air rib supporting member is 141.8 MPa, and the maximum strain is 288.4 mm. The maximum stress is concentrated at the clamping foot, and the maximum strain is at the arch crown, which meets the strength requirements. Figure 13-14 As shown in the figure, when the pressure applied inside the air rib becomes 800 kPa, the maximum stress of the air rib support member is 215.2 MPa, the maximum strain is 366.2 mm, the maximum stress is concentrated at the clamping foot, and the maximum strain occurs on both sides of the arch, meeting the strength requirements.

[0096] Example 3

[0097] Building on Example 1, this example further designs and illustrates the structure and process of the air rib's outer tube. The outer tube is fabricated from a high-strength base fabric into a tubular shape. The air ribs are incorporated into the outer tube, increasing the wear resistance of the air ribs and ensuring the integrity of the outer tube, thereby improving the reliability of the air ribs. To ensure the overall tensile strength of the outer tube, six continuous reinforcing webbing strips are installed on the outer tube to strengthen it. The connection nodes provided on the outer tube also connect to the tarpaulin and wind-resistant cables 10.

[0098] Example 4

[0099] On the basis of Example 1, this example specifically explains and illustrates the structure of the clamping fixture 3 of the vertical supporting air rib 2. The vertical supporting air rib 2 has a certain rigidity after being filled with high-pressure gas. In order to firmly fix the two ends of the vertical supporting air rib 2 on the ground, it is necessary to install the vertical supporting air rib 2 on a rigid structure, and then fix the rigid structure to the ground. Therefore, the present invention designs a clamping fixture 3, installs the two ends of the vertical supporting air rib 2 on the clamping fixture 3, and then fixes the clamping fixture 3 to the first frame 4 by bolts. The first frame 4 is then fixed to the ground, thereby fixing the vertical supporting air rib 2 to the ground to form a stable support structure. The clamping fixture 3 of the vertical supporting air rib 2 is composed of two plywoods, which are connected to the feet of the vertical supporting air rib 2 in a clamping manner and then fixed by high-strength bolts. The outer dimensions of the plywood fixture are 2800mm (length) × 125mm (height). It is made of thickened plate and has a total weight of approximately 130kg.

[0100] Example 5

[0101] Based on Example 4, this example specifically explains and illustrates the structure of the first frame 4 for vertically supporting the gas rib 2. The first frame 4 is welded from hollow cold-bent square tubes, and a fixed baffle for fixing the clamping fixture 3 is provided in the middle of the first frame 4. Since the column feet on both sides of the vertically supporting gas rib 2 are heavy and long, in order to facilitate the operation and installation of the staff while ensuring stability, the middle fixed baffle is made into a single-sided form, and the fixed baffles at both ends are double-sided, such as Figure 4 shown.

[0102] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An ultra-large-span high-pressure inflatable hangar system for parking aircraft, characterized by: The invention comprises a hangar body (1), an eyelid-type door and a tarpaulin, wherein the eyelid-type door is two leaves, respectively located on both sides of the hangar body (1); the tarpaulin is used to cover the hangar body (1) and the eyelid-type door; the hangar body (1) comprises a plurality of vertical supporting air ribs (2) arranged at intervals; a clamping tool (3) is provided at the bottom of the vertical supporting air ribs (2); the vertical supporting air ribs (2) are connected to a first frame (4) through the clamping tool (3); and the first frame (4) is fixedly connected to the ground; The eyelid-type gate comprises a plurality of oblique supporting air ribs (5) arranged at intervals and a gate drive assembly (6); the structure of the oblique supporting air ribs (5) is the same as that of the vertical supporting air ribs (2); a hinged bracket (7) is provided at the bottom of the oblique supporting air ribs (5); the hinged bracket (7) comprises a hinged support (71), an elevated seat (72) and a second frame (73); the bottom of the oblique supporting air ribs (5) is connected to the hinged support (71); the bottom of the hinged support (71) is hinged to the elevated seat (72); and the elevated seat (72) is fixed to the second frame (73); The door is opened and closed by a door drive assembly (6) driving a plurality of inclined supporting air ribs (5) to rotate. When the door is in a closed state, the inclined angles of the inclined supporting air ribs (5) are different, and the hinged supports (71) connected to the inclined supporting air ribs (5) are all in contact with the ground at one end away from the hangar body (1) to support the inclined inclined supporting air ribs (5). The air ribs include the vertical supporting air ribs (2) and the oblique supporting air ribs (5), and the interior of the air ribs is filled with high-pressure gas; an outer covering pipe is provided outside the air ribs, and a plurality of connection nodes are provided on the outer covering pipe.

2. The ultra-large span high-pressure inflatable hangar system according to claim 1 is characterized in that: The different inclination angles of the inclined supporting air ribs (5) are achieved in the following manner: the hinged supports (71) of the inclined supporting air ribs (5) have the same structure, but the heights of the raised seats (72) are different, and the heights of the raised seats (72) decrease in sequence from away from the hangar body (1) to closer to the hangar body (1).

3. The ultra-large-span high-pressure inflatable hangar system according to claim 1 is characterized in that: The different inclination angles of the inclined supporting air ribs (5) are achieved in the following manner: the heights of the raised seats (72) for the inclined supporting air ribs (5) are the same, but the sizes of the hinged supports (71) are different. When the hinged supports (71) are tilted, the distance between the end of each hinged support (71) supported on the ground and its hinge point increases in sequence from the direction away from the hangar body (1) to the direction close to the hangar body (1).

4. The ultra-large-span high-pressure inflatable hangar system according to claim 1 is characterized in that: The gate drive assembly (6) comprises a reel (61) and bearing seats (62) supporting both ends of the reel (61); both ends of the reel (61) are connected to a connecting shaft (63); the connecting shaft (63) at one end is connected to a hand wheel (64) and is manually driven by the hand wheel (64); the connecting shaft (63) at the other end is connected to a reducer and a motor (65) and is electrically driven by the motor (65); a steel wire rope is wound around the reel (61); a pulley block is provided on a plurality of vertical supporting air ribs (2) and an inclined supporting air rib (5) near the gate, and the pulley block is connected to the steel wire rope.

5. The ultra-large span high-pressure inflatable hangar system according to claim 1 is characterized in that: Wind-resistant cables (10) are arranged on both sides of each vertical supporting air rib (2) and the oblique supporting air rib (5), and the wind-resistant cables (10) are fixed to both sides of the hangar through an anchoring system, and the wind-resistant cables (10) on both sides of the hangar form a mesh structure; the anchoring system includes screw piles, expansion bolts or counterweights.

6. The ultra-large span high-pressure inflatable hangar system according to claim 1, characterized in that: The diameter of the air rib is 1700 mm; a plurality of groups of transverse supporting air ribs (11) are arranged between two adjacent vertical supporting air ribs (2); a transverse supporting air rib (11) outer wrapping tube is arranged outside the transverse supporting air rib (11); a plurality of connection nodes are arranged on the transverse supporting air rib (11) outer wrapping tube; the transverse supporting air rib (11) and the vertical supporting air rib (2) are firmly connected by the connection nodes arranged on the transverse supporting air rib (11) outer wrapping tube and the vertical supporting air rib (2) outer wrapping tube; the diameter of the transverse supporting air rib (11) is 630 mm.

7. The ultra-large span high-pressure inflatable hangar system according to claim 1, characterized in that: The air rib is composed of an external woven tube and an internal air-sealing membrane. The external woven tube is made of polyethylene nanomaterial. The weaving process of the external woven tube includes: twisting multiple strands of polyethylene nanomaterial filaments and fixing them into a polyethylene nanomaterial thread, weaving with a square weave, 2 up and 2 down, based on the plain weave, and weaving with the weaving points extended along the warp and weft directions.

8. The ultra-large-span high-pressure inflatable hangar system according to claim 7, characterized in that: The air-sealing membrane is made of TPU material, and the air rib laminating process includes: coating the outer surface of the inner air-sealing membrane with adhesive and then inserting it into the outer woven tube, sealing the inner air-sealing membrane and the outer woven tube at both ends and filling them with steam, and the inner air-sealing membrane and the adhesive are bonded to the outer woven tube under the action of high-temperature steam for lamination.

9. The ultra-large span high-pressure inflatable hangar system according to claim 1, characterized in that: The production process of air ribs includes: twisting → splicing → twisting → winding → spacer ring → threading the warp → threading the weft → test run → weaving → cutting → edge sealing → gluing → laminating; the specific steps are: ① Twisting After the 1600D yarn enters the workshop, it is inspected for count and single-filament physical index, and only those that pass the inspection are put into production; ②Splicing line The number of warp and weft yarns combined is 11, and the yarns are evenly wound and distributed on the surface of the bobbin without overlapping, and the number of yarns in the whole bobbin is consistent; ③Twisting The twist of the yarn used for the air rib structure is 30~500Tml, and the twist is added according to the twist requirements; ④Spinning Control the winding regulator's automatic tube changing mechanism and the end-breakage automatic stop mechanism to rewind the twisted weft yarn into a size that matches the circular loom shuttle, so as to be suitable for subsequent circular weaving production; ⑤ Spacer ring Install appropriate spacer rings according to the diameter of the air rib structure to be woven; ⑥ Threading the warp Place the semi-finished product from the previous step on the creel of the circular loom, and introduce the warp threads on the creel into the yarn collector through the porcelain holes on the rear support and the front support in parallel to avoid crossing. Then, regularly pass through the guide, and then pass through the wire hole on the top of the jumper, and then alternately pass through the holes on the inner and outer steel wire ropes, and finally pass through the channel ring to introduce it into the sizing spacer ring; Use a woven strip to roll onto the winder, pass one end through the traction roller, pull down all the warp threads between the sizing spacer rings and connect them to the strip head, and adjust the tension so that all jumpers are in the same position; ⑦ Weft threading Spread the warp threads, insert a pick into the shuttle, lead the weft threads into the roller groove through the guide pin, hold the weft thread end, start the machine to rotate the shuttle 90 degrees and then conduct the subsequent weaving test run; ⑧Test run Start the machine, make sure the shuttle is running normally, and start formal weaving after the jumper is in the right position; ⑨Weaving The knitting method adopts a loop-type needle-retracting and needle-retracting knitting method, and uses a computerized flat knitting machine for forming knitting. The three-dimensional geometric shape is unfolded into a two-dimensional figure. The number of knitting working needles and the needle-retracting and needle-retracting process are accurately determined according to the unfolded two-dimensional figure, so that the knitted fabric fully conforms to the cylindrical shape; L-shaped and U-shaped tubes are used for weaving; ⑩Cutting and edge banding According to the size of the gas rib after overall forming, the fixed length of the external woven tube is cut from the braiding machine, and the edge of the external woven tube is sealed with a webbing; Glue coating Apply adhesive to the outside of the air-sealing membrane of the air rib; Lamination The airtight film coated with adhesive on the outside is put into the outer woven tube, the inner film and both ends of the woven tube are sealed and filled with steam, and the inner film and adhesive are bonded to the outer woven tube under the action of high-temperature steam to perform the lamination process.

10. The ultra-large span high-pressure inflatable hangar system according to claim 1, characterized in that: The outer covering pipe is made of high-strength base fabric processed into a tubular shape, and a plurality of continuous reinforcing belts are arranged on the outer covering pipe; the outer span of the hangar system is greater than 60m, the height is greater than 25m, and when the hangar is in an open state, the net length of the hangar is greater than 60m; the number of the vertical supporting air ribs (2) is 15; the number of the oblique supporting air ribs (5) on both sides of the gate is 3 respectively.

Images