High-altitude large and small umbrella linkage opening and closing device

Abstract

The utility model relates to the field of high-altitude wind energy, in particular to a high-altitude large and small umbrella linkage opening and closing device which comprises a mooring rope. The center of the top of the umbrella body is connected to the mooring rope in a sleeving mode, the umbrella body comprises large umbrella cloth and small umbrella cloth, an opening is formed in the center of the large umbrella cloth, the large umbrella cloth is an annular umbrella, and the diameter of the small umbrella cloth is larger than the annular inner diameter of the large umbrella cloth; the problems that an acting umbrella is short in service life, short in acting time and high in manufacturing cost due to the fact that loads are large in the opening and closing process of an umbrella body are solved. The umbrella body is divided into different independent and controllable umbrella surfaces through the sleeving assembly form of the annular umbrella made of the large umbrella cloth and the circular umbrella made of the small umbrella cloth, so that the opening and closing difficulty of the whole umbrella body is reduced; the small umbrella cloth shuttles back and forth on the outer side or the inner side of the center opening of the large umbrella cloth, the effect that opening and closing of the small umbrella cloth drive opening and closing of the large umbrella cloth is achieved, and therefore the tension load generated by the acting umbrella is shared.

Description

Technical Field

[0001] This utility model relates to the field of high-altitude wind energy, and more specifically, to a high-altitude large and small umbrella linkage opening and closing device. Background Technology

[0002] The reserves of high-altitude wind resources are more than 100 times the global electricity consumption, and the power density of high-altitude winds is several to tens of times that of near-surface winds. Theoretically, the power generation time at high altitudes exceeds 95%, with an annual power generation time of over 6500 hours. The parachute-type land-based high-altitude wind power generation system includes an aerial parachute ladder device and a land-based power generation device. The parachute ladder includes a power awning, a stabilizing awning, and a helium balloon. The power awning is mainly used to collect wind energy and perform work; therefore, its design radius is usually very large. The design of the drive or ferrule disengagement device that controls its opening and closing is also very challenging. For example, a planar power awning with a radius of 40 meters can generate a tensile force of up to 70 tons, which increases the design pressure on the drive or ferrule.

[0003] How can we design an auxiliary scheme for the working umbrella to reduce the load pressure on the drive or clamp disengagement device during the opening and closing process, thereby extending the service life of the drive or clamp, increasing the working time of the working umbrella, and reducing the manufacturing cost of the working umbrella? Utility Model Content

[0004] This utility model aims to overcome at least one defect (deficiency) of the prior art and provides a high-altitude large and small umbrella linkage opening and closing device to solve the problems of large load during the opening and closing process of the umbrella, resulting in short service life, short working time and high manufacturing cost of the working umbrella.

[0005] The technical solution adopted by this utility model is to provide a high-altitude large and small umbrella linkage opening and closing device, which includes: a cable; an umbrella body with its top center sleeved on the cable, the umbrella body including a large umbrella cloth and a small umbrella cloth, the large umbrella cloth having an opening in the center, the large umbrella cloth being an annular umbrella, the diameter of the small umbrella cloth being larger than the annular inner diameter of the large umbrella cloth, the small umbrella cloth protruding outside the annular inner diameter of the large umbrella cloth when the umbrella body is closed, and the small umbrella cloth overlapping inside the annular inner diameter of the large umbrella cloth when the umbrella body is open.

[0006] By using a nested assembly of a large circular umbrella and a small circular umbrella, the umbrella body is divided into independently controllable different umbrella surfaces, thereby reducing the difficulty of opening and closing the overall umbrella body. By having the small umbrella shuttle outside or inside the central opening of the large umbrella, the opening and closing of the small umbrella drives the opening and closing of the large umbrella, thus sharing the tensile load generated by the working umbrella.

[0007] Furthermore, it also includes: a small parachute cord connected to the small parachute cloth, a large parachute cord connected to the large parachute cloth; an upper driver, located at the top center of the umbrella body and driving the large and small parachute cloths to move on the cables; and a lower driver, located below the umbrella cloth, connected to the small parachute cords and driving the small parachute cloths to move on the cables.

[0008] The movement of the upper actuator on the cable causes the small umbrella fabric to shuttle back and forth through the central opening of the large umbrella fabric. The movement of the lower actuator on the cable changes the tension between the small umbrella rope and the small umbrella fabric, thereby controlling the opening and closing of the small umbrella fabric.

[0009] Furthermore, it also includes a connecting rope, which is used to enable the small umbrella fabric to drive the opening and closing of the large umbrella fabric; the outer edge fixing point of the small umbrella fabric is connected to the small umbrella rope, the outer edge fixing point of the large umbrella fabric is connected to the large umbrella rope, and the outer edge fixing point of the small umbrella fabric and the outer edge fixing point of the large umbrella fabric are connected by the connecting rope.

[0010] The outer edges of the small umbrella fabric and the large umbrella fabric are connected together by a connecting rope, so that the small umbrella fabric and the large umbrella fabric pull each other. When the small umbrella fabric opens or closes first, the connecting rope can drive the large umbrella fabric to open or close together.

[0011] Furthermore, it also includes a ferrule, which is fixed to the cable and located below the lower actuator, and cooperates with the lower actuator to disengage or lock, thereby moving or fixing the small paracord on the cable.

[0012] The small paracord is locked by the locking mechanism of the lower actuator, which tightens the small paracord under the force of the wind after it has a fixed support point on the cable, thus opening the small paracord. The small paracord is released by the locking mechanism of the lower actuator, which causes the small paracord to lose its fixed support point on the cable and move upward under the force of the wind together with the lower actuator, thus closing the small paracord.

[0013] Furthermore, it also includes a rotating mechanism, fixed to the cable and located below the ferrule. The rotating mechanism is connected to the large umbrella rope and drives the large umbrella rope to rotate around the center of the cable to cooperate with the rotation of the large umbrella fabric.

[0014] The rotating mechanism allows the large parachute rope to rotate 360° around the center of the cable along with the large parachute fabric, adapting to the multi-directional wind energy collection of the large parachute fabric. The rotating mechanism is fixed to the cable, ensuring that the large parachute rope always has a fixed support point on the cable. The large parachute rope remains taut under the action of wind force, and the tension of the connecting rope on the outer edge of the large parachute fabric changes the opening and closing angle of the large parachute rope, thus affecting the opening and closing state of the large parachute fabric.

[0015] Furthermore, the large paracord includes at least four cords, which are centrally symmetrically connected to both sides of the rotating mechanism. The rotating mechanism includes at least four circumferential positions, which form a rotating position around the center of the cable, driving the large paracord to rotate around the center of the cable. The number of circumferential positions matches the number of large paracords.

[0016] By using circumferential positions, the large parachute ropes can rotate around the cable to collect wind energy in any direction in the air, thereby maintaining the stability of the large parachute on the cable; by using at least four large parachute ropes, the connection state between the large parachute and the large parachute is kept balanced, and by matching the number of circumferential positions with the number of large parachute ropes, the large parachute remains balanced when the wind direction changes.

[0017] Furthermore, the lower actuator is locked to the ferrule on the cable, the upper actuator is passively moved upward or stationary at the top center of the umbrella fabric, and the moving speed of the upper actuator is greater than or equal to the moving speed of the lower actuator.

[0018] The lower actuator is locked in place with the ferrule, thus fixing the lower actuator to the cable and providing a fixed fulcrum for the small parachute rope below the lower actuator. The lower actuator moves at a speed of 0. The upper actuator moves upward, causing the small parachute to open. The small parachute then causes the large parachute to open, until both the small and large parachute are fully open. At this point, the upper actuator is stationary at the top center of the parachute, and its movement speed is also 0, achieving the effect of the large and small parachute opening in tandem.

[0019] Furthermore, the lower actuator is disengaged from the ferrule on the cable and locked, the upper actuator is passively moved upward or remains stationary at the top center of the umbrella fabric, the lower actuator is passively moved upward and is affected by the wind speed pull, the greater the wind speed pull, the faster the upward movement speed.

[0020] The lower actuator engages with the locking sleeve to disengage, allowing the lower actuator to move above the locking sleeve. The upper actuator also moves along the cable, with the lower actuator moving faster than the upper actuator. This causes the small parachute cord to quickly change from taut to slack. As the small parachute folds and flips backward, the connecting rope drives the large parachute cord to fold. As the small parachute flips backward, the overall structure of the umbrella gradually loses the wind-receiving surface of the small parachute, creating increasingly larger air vents. The tension on the large parachute cord gradually decreases until the upper actuator drives the small parachute cord to a position outside the annular inner diameter of the large parachute cord and then comes to a stop. The lower actuator also comes to a stop on the cable, achieving the effect of the large and small parachute cords closing in tandem.

[0021] Furthermore, the length of the connecting rope is less than the difference between the length of the large umbrella rope and the length of the small umbrella rope; the length of the connecting rope is greater than the difference between the arc length of the large umbrella fabric and the arc length of the small umbrella fabric.

[0022] By controlling the length relationship between the connecting rope and the large and small umbrella ropes, the connecting rope can maintain traction between the small and large umbrella fabrics without tangling with the large or small umbrella ropes, thus preventing the umbrella from opening and closing.

[0023] Furthermore, the outer edge of the large umbrella fabric is provided with a floating ring, which is filled with helium gas.

[0024] The floating rings are placed on the outer edge of the large umbrella fabric to prevent the large umbrella fabric from remaining folded and drooping in the air, thus avoiding entanglement between the large umbrella fabric and the large umbrella lines; the buoyancy of the floating rings is enhanced by filling them with helium.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows: by using the nesting assembly of the large umbrella fabric ring umbrella and the small umbrella fabric round umbrella, the umbrella body is divided into different independently controllable umbrella surfaces, thereby reducing the difficulty of opening and closing the overall umbrella body; by the small umbrella fabric shuttling outside or inside the center opening of the large umbrella fabric, the opening and closing of the small umbrella fabric drives the opening and closing of the large umbrella fabric, thereby sharing the tensile load generated by the working umbrella. Attached Figure Description

[0026] Figure 1 This is a diagram showing the umbrella body of this utility model in its pre-opened state.

[0027] Figure 2 This is a diagram showing the umbrella of this utility model in its fully opened state.

[0028] Figure 3 This is a diagram showing the umbrella body in a pre-closed state according to the present invention.

[0029] Figure 4 This is a diagram showing the umbrella body of this utility model in a fully closed state.

[0030] Figure 5 This is a concentric top view of the large umbrella fabric and the small umbrella fabric of this utility model.

[0031] Explanation of reference numerals in the attached diagram: Upper driver 100, Lower driver B200, Sleeve 300, Rotating mechanism 400, Large umbrella fabric 500, Small umbrella fabric 600, Large umbrella rope 700, Small umbrella rope 800, Cable 900. Detailed Implementation

[0032] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this invention. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0033] Example

[0034] like Figure 1-5As shown, this embodiment provides a high-altitude large and small umbrella linkage opening and closing device, which includes: a cable 900; an umbrella body with its top center sleeved on the cable 900, the umbrella body including a large umbrella fabric 500 and a small umbrella fabric 600, the large umbrella fabric 500 having an opening at its center, the large umbrella fabric 500 being an annular umbrella, the small umbrella fabric 600 having a diameter larger than the annular inner diameter of the large umbrella fabric 500, the small umbrella fabric 600 protruding outside the annular inner diameter of the large umbrella fabric 500 when the umbrella body is closed, and the small umbrella fabric 600 overlapping inside the annular inner diameter of the large umbrella fabric 500 when the umbrella body is open.

[0035] In this embodiment, the top center of the umbrella body is sleeved on the cable 900. The umbrella body includes a large umbrella fabric 500 and a small umbrella fabric 600. When the large umbrella fabric 500 and the small umbrella fabric 600 are opened together, the small umbrella fabric 600 is located inside the large umbrella fabric 500, and the outer edge fixing point of the small umbrella fabric 600 is also located inside the large umbrella fabric 500. The large umbrella fabric 500 has an opening in the center, allowing the small umbrella fabric 600 to pass through the opening. The large umbrella fabric 500 is a ring umbrella with an outer diameter of 40 meters and an inner diameter of 20 meters. The small umbrella fabric 600 is a circular umbrella with a diameter of 22 meters. When the large umbrella fabric 500 and the small umbrella fabric 600 are opened together, the overlap area between the small umbrella fabric 600 and the large umbrella fabric 500 is [missing information]. The annular area of ​​the large umbrella fabric is 500. The area of ​​a circle with a diameter of 600 mm is... The overlapping area accounts for 7% of the annular area of ​​the large umbrella fabric (500mm) and 17.4% of the circular area of ​​the small umbrella fabric (600mm).

[0036] It also includes: a small parachute rope 800 connected to the small parachute 600, and a large parachute rope 700 connected to the large parachute 500; an upper driver 100, located at the top center of the umbrella body, which drives the large parachute 500 and the small parachute 600 to move on the cable 900; and a lower driver 200, located below the umbrella fabric, connected to the small parachute rope 800, which drives the small parachute 600 to move on the cable 900.

[0037] In this embodiment, one end of the small parachute cord 800 is fixed below the lower actuator 200 and connected to connection points m and n symmetrically opposite to both sides of the cable 900; the other end of the small parachute cord 800 is fixed to the outer edge fixing point of the small umbrella fabric 600, symmetrically opposite to g and f on both sides of the cable 900. The large parachute cord 700 is fixed to the outer edge fixing point of the large umbrella fabric 500, symmetrically opposite to h and e on both sides of the cable 900. Both the upper actuator 100 and the lower actuator 200 can move on the cable 900, and the upper actuator 100 drives the small umbrella fabric 600 to move, while the lower actuator 200 drives the small parachute cord 800 to move.

[0038] It also includes a connecting rope, which is used to enable the small umbrella fabric 600 to drive the large umbrella fabric 500 to open and close; the outer edge fixing point of the small umbrella fabric 600 is connected to the small umbrella rope 800, the outer edge fixing point of the large umbrella fabric 500 is connected to the large umbrella rope 700, and the outer edge fixing point of the small umbrella fabric 600 and the outer edge fixing point of the large umbrella fabric 500 are connected by the connecting rope.

[0039] In this embodiment, one end of the connecting rope is connected to the outer edge fixing point of the small umbrella fabric 600, and the other end is connected to the outer edge fixing point of the large umbrella fabric 500. When the umbrella is about to open, the large umbrella rope 700 on the outer edge fixing point of the large umbrella fabric 500 remains taut and partially open, while the small umbrella rope 800 on the outer edge fixing point of the small umbrella fabric 600 remains taut. The small umbrella fabric 600 moves upward in preparation for opening. The connecting rope transmits the upward opening force between the outer edge fixing points of the small umbrella fabric 600 and the large umbrella fabric 500, causing the small umbrella fabric 600 to open first and the large umbrella fabric 500 to open sequentially. When the umbrella is about to close, the large umbrella cord 700 at the outer edge fixing point of the large umbrella fabric 500 remains taut and open, while the small umbrella cord 800 at the outer edge fixing point of the small umbrella fabric 600 remains slack. The upward movement speed of the small umbrella fabric 600 is less than that of the small umbrella cord 800, causing the small umbrella fabric 600 to protrude beyond the central opening of the large umbrella fabric 500. The connecting cord also protrudes beyond the central opening of the large umbrella fabric 500 on the side of the outer edge fixing point of the small umbrella fabric 600, pulling the outer edge fixing point of the large umbrella fabric 500 towards the annular inner diameter of the large umbrella fabric 500.

[0040] It also includes a ferrule 300, which is fixed to the cable 900 and located below the lower actuator 200, and cooperates with the lower actuator 200 to disengage or lock, thereby moving or fixing the small paracord 800 on the cable 900.

[0041] In this embodiment, the retainer 300 engages with the lower actuator 200 to lock or disengage. When the umbrella is in a pre-opening or fully open state, the retainer 300 is locked with the lower actuator 200, one end of the small parachute rope 800 is fixed to the cable 900, and the other end is inside the annular inner diameter of the large umbrella fabric 500. When the umbrella is in a pre-closed or fully closed state, the retainer 300 disengages from the lower actuator 200, one end of the small parachute rope 800 moves on the cable 900, and the other end is outside the annular inner diameter of the large umbrella fabric 500.

[0042] It also includes a rotating mechanism 400, which is fixed to the cable 900 and located below the lower 200 ferrule 300. The rotating mechanism 400 is connected to the large umbrella rope 700 and drives the large umbrella rope 700 to rotate around the center of the cable 900 to cooperate with the rotation of the large umbrella fabric 500.

[0043] In this embodiment, the rotating mechanism 400 is fixed to the cable 900. The large umbrella rope 700 is fixed at one end by connecting to the rotating mechanism 400, while the other end is always above the rotating mechanism 400 due to wind force, thus keeping the large umbrella rope 700 taut. The rotating mechanism 400 can rotate 360° around the center of the cable 900, and the large umbrella rope 700 can also rotate 360° around the center of the cable 900 accordingly to adapt to wind direction collection by the large umbrella fabric 500 in all directions.

[0044] The large parachute rope 700 includes at least four ropes, which are centrally symmetrically connected to both sides of the rotating mechanism 400. The rotating mechanism 400 includes at least four circumferential positions, which form a rotating position around the center of the cable 900, thereby driving the large parachute rope 700 to rotate around the center of the cable 900. The number of circumferential positions matches the number of large parachute ropes 700.

[0045] In this embodiment, the large umbrella rope 700 includes two 2X ropes (X is an integer greater than or equal to 2), and the rotating mechanism 400 includes 2X (X is an integer) centrally symmetrical circumferential positions. The large umbrella rope 700 is correspondingly connected to the circumferential positions, and each circumferential position can rotate 360° around the center of the cable 900 to adapt to wind direction collection by the large umbrella fabric 500 in various directions. In this embodiment, X is 2, there are 4 large umbrella ropes 700, and there are 4 circumferential positions.

[0046] The lower actuator 200 is locked to the sleeve 300 on the cable 900, the upper actuator 100 is passively moved upward or stationary at the top center of the umbrella fabric, and the moving speed of the upper actuator 100 is greater than or equal to the moving speed of the lower actuator 200.

[0047] In this embodiment, when the umbrella is about to open, it transitions from a fully closed state. The lower actuator 200 remains locked to the retaining sleeve 300, and the lower actuator 200 moves at a speed of 0. The upper actuator 100 is passively moved upwards by the wind to the top center of the umbrella fabric, and the moving speed of the upper actuator 100 is greater than that of the lower actuator 200. When the umbrella is fully open, the lower actuator 200 is locked to the retaining sleeve 300, and the lower actuator 200 moves at a speed of 0. The upper actuator 100 remains stationary at the top center of the umbrella fabric, and its moving speed is also 0.

[0048] The lower actuator 200 is disengaged and locked from the sleeve 300 on the cable 900. The upper actuator 100 is passively moved upward or remains stationary at the top center of the umbrella fabric. The lower actuator 200 is passively moved upward and is affected by the wind speed pull. The greater the wind speed pull, the faster the upward movement speed.

[0049] In this embodiment, when the umbrella is about to close, it changes from a fully open state. The lower actuator 200 disengages from the locking sleeve 300, and the lower actuator 200 and the upper actuator 100 move upward together, with the lower actuator 200 moving upward at a faster speed. This causes the small umbrella cord 800 to quickly loosen, thereby causing the small umbrella fabric 600 to fold rapidly. During the folding and backward flipping of the small umbrella fabric, the connecting cord drives the large umbrella fabric to fold. As the small umbrella flips backward, the overall umbrella structure gradually loses the wind-receiving surface of the small umbrella, forming an increasingly larger air vent, and the tension on the large umbrella cord 700 gradually decreases. When the umbrella is fully closed, the lower actuator 200 and the upper actuator 100 are stationary relative to the cable 900, and their movement speeds are both 0.

[0050] The length of the connecting rope is less than the difference between the length of the large umbrella rope 700 and the length of the small umbrella rope 800; the length of the connecting rope is greater than the difference between the arc length of the large umbrella fabric 500 and the arc length of the small umbrella fabric 600.

[0051] In this embodiment, when the umbrella is fully open, both the large umbrella rope 700 and the small umbrella rope 800 remain taut, and the opening angles of the large umbrella rope 700 and the small umbrella rope 800 are the same, and they are parallel to each other. In order to enable the small umbrella cloth 600 to pull the large umbrella cloth 500 through the taut connecting rope when opening and closing, the length of the connecting rope is less than the difference between the lengths of the two, and the length of the connecting rope is greater than the difference between the arc length of the large umbrella cloth 500 and the arc length of the small umbrella cloth 600.

[0052] The outer edge of the large umbrella fabric 500 is provided with a floating ring, which is filled with helium.

[0053] In this embodiment, the outer edge of the umbrella may collapse during the opening and closing process. A floating ring is set on the outer edge of the large umbrella fabric 500 and filled with helium to keep the large umbrella fabric 500 floating, thereby keeping the large umbrella rope 700 taut.

[0054] In this embodiment, the opening and closing of the umbrella includes four cyclical states: fully open, ready to close, fully closed, and ready to open. When the umbrella is fully open, both the small umbrella cord 800 and the large umbrella cord 700 remain taut, pulling the small umbrella fabric 600 and the large umbrella fabric 500 taut respectively. Both the small umbrella fabric 600 and the large umbrella fabric 500 remain taut to collect wind power. The upper actuator 100 is located at the top center of the umbrella, and the lower actuator 200 is located at the locking sleeve 300 and remains locked. When the umbrella is in the pre-closed state, the lower actuator 200 disengages from the locking sleeve 300 and pops upward, causing the small parachute line 800 to slacken instantly. The upper actuator 100 moves upward, but at a slower speed than the lower actuator 200, causing the small parachute fabric 600 to fold out of the central opening of the large parachute fabric 500. After the small parachute fabric 600 folds, the connecting rope at the outer edge fixing point of the small parachute fabric 600 is pulled towards the cable 900, which in turn causes the outer edge fixing point of the large parachute fabric 500 to also move towards the cable 900. When the umbrella is fully closed, the lower actuator 200 and the upper actuator 100 continue to move upward, but both remain stationary relative to the cable 900, so that the outer edge fixing point of the small parachute fabric 600 is located outside the central opening of the large parachute fabric 500. After the small parachute fabric 600 folds, the outer edge fixing point of the large parachute fabric 500 is also completely folded towards the cable 900 due to the traction force of the connecting rope. When the umbrella is ready to open, the lower actuator 200 and the upper actuator 100 move downward together, and the outer edge fixing point of the small umbrella fabric 600 is moved to the inside of the center opening of the large umbrella fabric 500. The small umbrella fabric 600 retracts to the inside of the large umbrella fabric 500. The connecting rope connected to the outer edge fixing point of the small umbrella fabric 600 drives the large umbrella rope 700 to unfold in both directions of the cable 900, and the large umbrella fabric 500 is released. After the lower actuator 200 moves to the position of the retainer 300 and keeps it locked, the upper actuator 100 moves upward again, so that the small umbrella fabric 600 and the small umbrella rope 800 are tightened, thereby driving the large umbrella fabric 500 and the large umbrella rope 700 to tighten.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the technical solution of this utility model, and are not intended to limit the specific implementation of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A high-altitude large and small umbrella linkage opening and closing device, characterized in that, include: Cable; The umbrella body is fitted onto the cable at the top center. The umbrella body includes a large umbrella fabric and a small umbrella fabric. The large umbrella fabric has an opening at the center and is an annular umbrella. The diameter of the small umbrella fabric is larger than the inner diameter of the large umbrella fabric. When the umbrella body is closed, the small umbrella fabric protrudes outside the inner diameter of the large umbrella fabric. When the umbrella body is open, the small umbrella fabric overlaps inside the inner diameter of the large umbrella fabric.

2. The high-altitude large and small umbrella linkage opening and closing device according to claim 1, characterized in that, Also includes: Small parachute cords that connect to the small umbrella fabric, and large parachute cords that connect to the large umbrella fabric; The upper drive is located at the top center of the umbrella body and drives the large and small umbrella fabrics to move on the cable. The lower drive is located below the umbrella fabric, connected to the small umbrella cords, and drives the small umbrella fabric to move on the cable.

3. The high-altitude large and small umbrella linkage opening and closing device according to claim 2, characterized in that, It also includes a connecting rope, which is used to enable the small umbrella fabric to drive the opening and closing of the large umbrella fabric; the outer edge fixing point of the small umbrella fabric is connected to the small umbrella rope, the outer edge fixing point of the large umbrella fabric is connected to the large umbrella rope, and the outer edge fixing point of the small umbrella fabric and the outer edge fixing point of the large umbrella fabric are connected by the connecting rope.

4. The high-altitude large and small umbrella linkage opening and closing device according to claim 2, characterized in that, It also includes a ferrule, which is fixed to the cable and located below the lower actuator, and cooperates with the lower actuator to disengage or lock, thereby moving or fixing the small paracord on the cable.

5. The high-altitude large and small umbrella linkage opening and closing device according to claim 4, characterized in that, It also includes a rotating mechanism, which is fixed to the cable and located below the ferrule. The rotating mechanism is connected to the large umbrella rope and drives the large umbrella rope to rotate around the center of the cable to match the rotation of the large umbrella fabric.

6. The high-altitude large and small umbrella linkage opening and closing device according to claim 5, characterized in that, The large parachute rope includes at least four ropes, which are centrally symmetrically connected to both sides of the rotating mechanism. The rotating mechanism includes at least four circumferential positions, which form a rotating position around the center of the rope, driving the large parachute rope to rotate around the center of the rope. The number of circumferential positions matches the number of large parachute ropes.

7. The high-altitude large and small umbrella linkage opening and closing device according to claim 4, characterized in that, The lower actuator is locked to the ferrule on the cable, the upper actuator is passively moved upward or stationary at the top center of the umbrella fabric, and the moving speed of the upper actuator is greater than or equal to the moving speed of the lower actuator.

8. A high-altitude large and small umbrella linkage opening and closing device according to claim 4, characterized in that, The lower actuator is disengaged from the ferrule on the cable and locked. The upper actuator is passively moved upward or remains stationary at the top center of the umbrella fabric. The lower actuator is passively moved upward and is affected by the wind speed pull. The greater the wind speed pull, the faster the upward movement speed.

9. A high-altitude large and small umbrella linkage opening and closing device according to claim 3, characterized in that, The length of the connecting rope is less than the difference between the length of the large umbrella rope and the length of the small umbrella rope; the length of the connecting rope is greater than the difference between the arc length of the large umbrella fabric and the arc length of the small umbrella fabric.

10. A high-altitude large and small umbrella linkage opening and closing device according to claim 1, characterized in that, The outer edge of the large umbrella fabric is provided with a floating ring, which is filled with helium.

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