A kind of umbrella skirt for large parachute

Abstract

The invention provides an umbrella skirt for a large parachute, comprising a main umbrella canopy, an umbrella rope, an outer umbrella skirt, an inner umbrella skirt, a pull rope, a cutter and a controller. The main umbrella canopy is provided with a first round edge and a cutter, a circumferential closing rope is wrapped around the first round edge, n umbrella rope buckles are provided on the first round edge, n umbrella ropes are respectively passed through n umbrella rope buckles, a second round edge and a third round edge are provided on the outer umbrella skirt, the outer umbrella skirt is made of a breathable textile material, and 2n umbrella ropes are evenly distributed in the middle of the outer umbrella skirt. The outer umbrella skirt buckle loop and the inner umbrella skirt are of hemispherical structure. The bottom of the inner umbrella skirt is provided with a fourth circular edge, and n inner umbrella skirt buckle loops are evenly distributed on the fourth circular edge. The pull rope passes through all the umbrella rope buckle loops, all the outer umbrella skirt buckle loops and all the inner umbrella skirt buckle loops and goes around the circumference of the outer umbrella skirt, so that the pull rope is in the shape of petals. The cutter is in contact with the circumferential closing rope and the pull rope, which solves the problem of asynchronous parachute opening and enables a single parachute to be orderly unfolded and filled, thereby improving the synchronization of parachute opening of multiple parachutes.

Description

Technical Field

[0001] The invention belongs to the technical field of airdrop, and in particular relates to a parachute skirt for a large parachute. Background Art

[0002] Parachutes are an important component of airborne airdrop equipment. Airdrop refers to a technical means of using parachutes as pneumatic deceleration devices to airdrop supplies and equipment to a certain area. It is an important way to quickly or urgently supply supplies and equipment. Conventional airdrop systems are generally composed of system groups such as parachutes and material delivery platforms. Due to their ease of use and wide range of weight coverage, they have been widely used in civil, military, aerospace and other fields. Especially in areas with vast territory and complex natural and geographical conditions, emergency rescue and logistics supply tasks are frequent, which puts forward practical needs for the rapid supply of supplies and equipment and the development of corresponding airdrop systems.

[0003] In recent years, with the widespread use of large transport aircraft, the demand for airdrop missions of large and heavy materials and equipment has become more and more frequent. As the airdrop weight increases, the area of ​​the parachute required will also become larger and larger. When the airdrop weight exceeds a certain range, if a single parachute is used, its area will become very large. Too large an area will make it difficult to produce and use a parachute, and the manufacturing cost of a single parachute is expensive. Therefore, at present, a group parachute system composed of multiple large parachutes (more than 300 square meters) is generally used at home and abroad to achieve the delivery of large and heavy equipment.

[0004] However, since the cluster parachute system is composed of multiple parachutes, the initial states of the parachutes are inconsistent during use, and the parachutes are often opened asynchronously, resulting in a single or multiple fast-inflating parachutes being overloaded and damaged, or the slow-inflating parachutes being unable to be fully inflated, thereby reducing the drag characteristics of the cluster parachute, causing the airdropped material equipment to land at a high speed, which affects the safety of the airdropped material equipment. At present, large parachutes mainly use the bottom edge circumferential closing technology to control the parachute opening process. The circumferential closing can better solve the problem of excessive parachute opening overload caused by the parachute inflating too quickly by controlling the mass flow rate of the air inlet during the parachute opening process, but it is less effective in solving the problem of single or multiple parachutes being unable to be fully inflated. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a parachute skirt for a large parachute, which can solve the problem of asynchronous parachute opening, so that a single parachute can be unfolded and filled in an orderly manner, thereby improving the synchronization of parachute opening of a group of multiple parachutes.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A parachute skirt for a large parachute comprises a main parachute canopy, parachute ropes, an outer parachute skirt, an inner parachute skirt, a pull rope, a cutter and a controller, wherein the main parachute canopy is a hemispherical structure, the main parachute canopy is provided with a first round edge and a cutter, the circumferential closing rope is wrapped around the first round edge, the length of the circumferential closing rope is less than the circumference of the first round edge, the first round edge is provided with n parachute rope buckles, the n parachute ropes are respectively passed through the n parachute rope buckles, the outer parachute skirt is a circular ring structure, the outer parachute skirt is provided with a second round edge and a third round edge, the outer parachute skirt is made of a breathable textile material, 2n outer parachute skirt buckles are evenly distributed in the middle of the outer parachute skirt, the inner parachute skirt is a hemispherical structure, the top of the inner parachute skirt is provided with a top hole, the bottom of the inner parachute skirt is provided with a fourth round edge, and n inner parachute skirt buckles are evenly distributed on the fourth round edge, The outer umbrella skirt and the inner umbrella skirt are both arranged in the main parachute canopy, and the pull rope passes through an umbrella rope buckle loop, an outer umbrella skirt buckle loop, an inner umbrella skirt buckle loop in sequence, and then passes through another outer umbrella skirt buckle loop and another umbrella rope buckle loop, and repeats this process until it passes through all umbrella rope buckles, all outer umbrella skirt buckles and all inner umbrella skirt buckles and circles the outer umbrella skirt circumference, so that the pull rope is in the shape of petals, and the cutter is in contact with both the circumferential closing rope and the pull rope. When the main parachute canopy, the outer umbrella skirt and the inner umbrella skirt are released, the air quickly fills the inner umbrella skirt, and then the main parachute canopy is filled into a lantern shape through the outer umbrella skirt, the controller controls the cutter to work, and after the cutter cuts off the circumferential closing rope and the pull rope, the outer umbrella skirt and then the inner umbrella skirt automatically fall off, and the high-pressure airflow gathered by the inner umbrella skirt can quickly open the main parachute canopy, so that the airflow can quickly fill the entire main parachute canopy.

[0008] Furthermore, the second round edge and the third round edge on the outer umbrella skirt are both locked.

[0009] Furthermore, the fourth round edge on the inner umbrella skirt is locked.

[0010] Furthermore, the umbrella rope buckle loop, the outer umbrella skirt buckle loop and the inner umbrella skirt buckle loop are all rope rings.

[0011] Furthermore, the inner umbrella skirt has a plurality of reinforcement bands uniformly sewn along the circumferential direction.

[0012] Furthermore, the bottom of each reinforcement belt is surrounded to form an inner umbrella skirt buckle loop, and the number of the reinforcement belts is n.

[0013] Furthermore, let the diameter of the main parachute canopy after unfolding be D, let the diameter of the second side of the outer umbrella skirt be Dw, Dw=1 / 10~1 / 6D, let the diameter of the inner umbrella skirt after unfolding be Dn, Dn=1 / 3-2 / 3Dw, and the circumference of the top hole be Dd, Dd=1 / 8-1 / 6Dn, let the total length of the pull rope be L, L=n*(Dw-Dn)+1.

[0014] Furthermore, it also includes an air pressure sensor, which is used to sense the atmospheric pressure value in the main parachute canopy and convert the atmospheric pressure value into an electrical signal to transmit to the controller. The controller is used to receive the atmospheric pressure value electrical signal transmitted by the air pressure sensor. When the atmospheric pressure value electrical signal reaches a certain threshold, the controller outputs a control signal to the cutter, and the cutter cuts off the circumferential closing rope and the pull rope.

[0015] Furthermore, the drawstring is an elastic rope.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] (1) The present invention provides a shed for a large parachute to control the inflation process of the large parachute, so as to better solve the problem that a single or multiple parachutes cannot be filled with air during the group parachute opening process, thereby improving the inflation efficiency and opening synchronization of the parachutes during the group parachute opening process.

[0018] (2) The present invention provides a shed for a large parachute, which controls the total air intake through the shed at the initial stage of main parachute canopy opening, and enables all main parachute canopies to be and only be inflated into a lantern shape before the outer shed and the inner shed are released, thereby ensuring the consistency of the state of the group parachutes before they are opened and filled.

[0019] (3) The present invention provides a shed for a large parachute. After the outer shed and the inner shed are released, the high-pressure airflow gathered by the inner shed can quickly open the main parachute canopy, so that the airflow can quickly fill the entire main parachute canopy, so that the canopy of each main parachute in the group of parachutes can be well inflated. In addition, since it inflates quickly and the inflating time is fast, the consistency of the inflation state of the parachutes before the outer shed and the inner shed are also good. Therefore, the synchronization of the opening and inflating of the group of parachutes is also greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a top view of the inner and outer shed skirts after they are connected.

[0021] Figure 2 This is a top view of the outer umbrella skirt.

[0022] Figure 3 This is a top view of the inner umbrella skirt.

[0023] Figure 4 A schematic diagram of a draw cord passing through the inner shed buckle to connect the inner shed.

[0024] Figure 5 This is a schematic diagram of the pull rope passing through the parachute rope buckle and connecting with the first circular edge of the main parachute canopy.

[0025] Figure 6Schematic diagram of the pull rope connecting the inner shed, outer shed and main parachute canopy.

[0026] Figure 7 This is a schematic diagram of the initial inflation state of the parachute after the inner and outer shed skirts are installed.

[0027] In the figure, 1. main parachute canopy; 11. first round edge; 2. umbrella rope buckle; 3. circumferential closing rope; 4. umbrella rope; 5. cutter; 6. outer umbrella skirt; 61. second round edge; 62. third round edge; 7. inner umbrella skirt; 71. fourth round edge; 72. top hole; 8. pull rope; 9. outer umbrella skirt buckle; 10. inner umbrella skirt buckle; 11. reinforcement belt. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0030] A shed for a large parachute, such as Figure 1-Figure 7As shown, it includes a main parachute canopy 1, parachute ropes 4, outer parachute skirts 6, inner parachute skirts 7, pull ropes 8, cutters 5 and controllers. The main parachute canopy 1 is a hemispherical structure. The main parachute canopy 1 is provided with a first circular edge 11 and a cutter 5. The circumferential closing rope 3 is wrapped around the first circular edge 11. The length of the circumferential closing rope 3 is less than the circumference of the first circular edge 11. The first edge is provided with n parachute rope buckles 2. The n parachute ropes 4 are respectively passed through n parachute rope buckles 2. The outer parachute skirt 6 is annular. The outer umbrella skirt 6 is provided with a second round edge 61 and a third round edge 62, the outer umbrella skirt 6 is made of a breathable textile material, 2n outer umbrella skirt buckles 9 are evenly distributed in the middle of the outer umbrella skirt 6, the inner umbrella skirt 7 is a hemispherical structure, and a top hole 72 is provided on the top of the inner umbrella skirt 7. The top hole 72 is used to prevent the inner umbrella canopy from being damaged due to excessive pressure, and a fourth round edge 71 is provided at the bottom of the inner umbrella skirt 7. There are n inner umbrella skirt buckles 10 evenly distributed on the fourth round edge 71. The outer umbrella skirt 6 and the inner umbrella canopy are connected to each other. The skirt 7 is arranged in the main umbrella canopy 1, and the pull rope 8 passes through a rope buckle 2, an outer umbrella skirt buckle 9, an inner umbrella skirt buckle 10 in sequence, and then passes through another outer umbrella skirt buckle 9 and another rope buckle 2. Repeat this process until it passes through all the rope buckles 2, all the outer umbrella skirt buckles 9 and all the inner umbrella skirt buckles 10 and circles around the outer umbrella skirt 6, so that the pull rope 8 is in the shape of a petal. The cutter 5 contacts the circumferential closing rope 3 and the pull rope 8. When there is a After the main parachute canopy 1 of the outer parachute skirt 6 and the inner parachute skirt 7 is pulled out of the parachute bag, the air quickly fills the inner parachute skirt 7, and then the main parachute canopy 1 is inflated into a lantern shape through the outer parachute skirt 6. The controller controls the cutter 5 to work. After the cutter 5 cuts off the circumferential closing rope 3 and the pull rope 8, the outer parachute skirt 6 and then the inner parachute skirt 7 automatically fall off. The high-pressure airflow gathered by the inner parachute skirt 7 quickly opens the main parachute canopy 1, so that the airflow can quickly fill the entire main parachute canopy 1.

[0031] The present invention provides a shed for a large parachute to control the inflation process of the large parachute, so as to better solve the problem that a single or multiple parachutes cannot be filled with air during the group parachute opening process, thereby improving the parachute inflation efficiency and the opening synchronization during the group parachute opening process.

[0032] The outer umbrella skirt 6 of the present invention is made of a textile material with large air permeability, and the inner umbrella skirt 7 is made of an airtight textile material. The inner umbrella skirt 7 is used to control part of the high-pressure airflow to converge at the inner umbrella. The outer umbrella skirt 6 is breathable and is used to allow part of the airflow to enter at the initial stage of parachute opening. First, during the parachute opening process, before the outer umbrella skirt 6 and the inner umbrella skirt 7 are released from the main parachute canopy 1, a relatively closed space is formed between the outer umbrella skirt 6 and the inner umbrella skirt 7 and the parachute canopy. Since the outer umbrella skirt 6 has a large air permeability, it is equivalent to establishing a balance channel inside and outside the main parachute canopy 1 at the bottom of the main parachute canopy 1. When the intake air flow pressure is less than the internal air flow pressure of the main parachute canopy 1, the main parachute canopy 1 will not be able to continue to be inflated and unfolded, that is, the total air intake is controlled by the umbrella skirt at the initial stage of the main parachute canopy 1 opening. Therefore, before the outer umbrella skirt 6 and the inner umbrella skirt 7 are released, all the main parachute canopies 1 can be and can only be inflated into a lantern shape, thereby ensuring the consistency of the state before the group parachutes are fully opened.

[0033] Secondly, since the inner umbrella skirt 7 is basically airtight, that is, before the umbrella skirt is released at the initial stage of umbrella opening, since the inner umbrella skirt 7 is relatively small, the airflow will first quickly fill the inner umbrella skirt 7, and a large amount of high-pressure airflow will be concentrated on the inner umbrella skirt 7; after the outer umbrella skirt 6 and the inner umbrella skirt 7 are released, the high-pressure airflow gathered by the inner umbrella skirt 7 will quickly fill the entire main umbrella canopy 1, so that each main umbrella canopy 1 in the group umbrella can be well inflated, and because it is quickly inflated and the inflating time is fast, the consistency of the state before the outer umbrella skirt 6 and the inner umbrella skirt 7 are released is also good, therefore, the synchronization of the opening and inflating of the group umbrellas is also greatly improved.

[0034] Since currently large parachutes generally use the bottom edge circumferential closing control technology, the large parachute referred to in the present invention is a large parachute using the bottom edge circumferential closing control technology.

[0035] The second round edge 61 and the third round edge 62 on the outer umbrella skirt 6 are both locked, and the fourth round edge 71 on the inner umbrella skirt 7 is locked, so that the second round edge 61 and the third round edge of the outer umbrella skirt 6 and the fourth round edge 71 on the inner umbrella skirt 7 are strengthened.

[0036] Specifically, overlocking is a commonly used sewing method. Since the edges of the fabric are not smooth after cutting and the fibers are easily exposed, it is usually folded inward one to two layers, about 14-16mm wide, and then sewn, so that the edges will be strengthened.

[0037] like Figure 2-Figure 5 As shown, the umbrella rope buckle loop 2, the inner umbrella skirt buckle loop 10 and the inner umbrella skirt buckle loop 10 are all rope loops, which are convenient for passing the pull rope 8.

[0038] In the present invention, Figure 3 As shown, a plurality of reinforcing bands 11 are evenly sewn on the inner shed 7 along the circumferential direction to strengthen the inner shed 7 so that air can be stored in the inner shed 7 before the inner shed 7 and the outer shed 6 are released at the initial stage of opening the umbrella.

[0039] In one embodiment of the present invention, Figure 3 As shown, an inner umbrella skirt buckle loop 10 is formed around the bottom of the reinforcing belt 11, and the inner umbrella skirt buckle loop 10 is used to allow the draw cord 8 to pass through and connect with the outer umbrella skirt 6. The number of reinforcing belts 11 is consistent with the number of inner umbrella skirt buckle loops 10, and the number of reinforcing belts 11 is n.

[0040] In the present invention, before the outer umbrella skirts 6 and the inner umbrella skirts 7 are released, all the outer umbrella skirts 6 and the inner umbrella skirts 7 can be and can only be filled into a lantern shape, thereby ensuring the consistency of the state of the group umbrellas before they are opened and filled, and after the outer umbrella skirts 6 and the inner umbrella skirts 7 are released, the high-pressure airflow gathered by the inner umbrella skirts 7 will quickly fill the entire main umbrella canopy 1, so that each main umbrella canopy 1 in the group umbrella can be well opened, and the diameter of the main umbrella canopy 1 after being unfolded is D, the diameter of the second side of the outer umbrella skirts 6 is Dw, Dw=1 / 10~1 / 6D, the diameter of the inner umbrella skirts 7 after being unfolded is Dn, Dn=1 / 3-2 / 3Dw, the circumference of the top hole 72 is Dd, Dd=1 / 8-1 / 6Dn, and the total length of the pull rope 8 is L, L=n*(Dw-Dn)+1.

[0041] In the present invention, the pull cord 8 is an elastic cord to maintain the plane shape of the outer umbrella skirt 6 in the initial stage of the parachute opening.

[0042] The present invention also includes an air pressure sensor, which is used to sense the atmospheric pressure value in the main parachute canopy 1 and convert the atmospheric pressure value into an electrical signal and transmit it to the controller. The controller is used to receive the atmospheric pressure value electrical signal transmitted by the air pressure sensor. When the atmospheric pressure value electrical signal reaches a certain threshold, the controller outputs a control signal to the cutter 5, and the cutter 5 cuts off the circumferential closing rope 3 and the pull rope 8.

[0043] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A shed for a large parachute, characterized in that: The invention comprises a main parachute canopy, an umbrella rope, an outer umbrella skirt, an inner umbrella skirt, a pull rope, a cutter and a controller, wherein the main parachute canopy is a hemispherical structure, the main parachute canopy is provided with a first round edge and a cutter, a circumferential closing rope is wrapped around the first round edge, the length of the circumferential closing rope is less than the circumference of the first round edge, n umbrella rope buckles are provided on the first round edge, and n umbrella ropes are respectively passed through n umbrella rope buckles, the outer umbrella skirt is a circular ring structure, the outer umbrella skirt is provided with a second round edge and a third round edge, the outer umbrella skirt is made of a breathable textile material, 2n outer umbrella skirt buckles are evenly distributed in the middle of the outer umbrella skirt, the inner umbrella skirt is a hemispherical structure, the top of the inner umbrella skirt is provided with a top hole, the bottom of the inner umbrella skirt is provided with a fourth round edge, n inner umbrella skirt buckles are evenly distributed on the fourth round edge, the outer umbrella skirt and the The inner umbrella skirts are all arranged in the main parachute canopy, and the pull rope passes through an umbrella rope buckle loop, an outer umbrella skirt buckle loop, an inner umbrella skirt buckle loop in sequence, and then passes through another outer umbrella skirt buckle loop and another umbrella rope buckle loop, and repeats this process until it passes through all umbrella rope buckles, all outer umbrella skirt buckles and all inner umbrella skirt buckles and circles the outer umbrella skirt circumference, so that the pull rope is in the shape of petals, and the cutter is in contact with both the circumferential closing rope and the pull rope. When the main parachute canopy, the outer umbrella skirt and the inner umbrella skirt are released, the air quickly fills the inner umbrella skirt, and then the main parachute canopy is filled into a lantern shape through the outer umbrella skirt. The controller controls the cutter to work, and after the cutter cuts off the circumferential closing rope and the pull rope, the outer umbrella skirt and then the inner umbrella skirt automatically fall off, and the high-pressure airflow gathered by the inner umbrella skirt can quickly open the main parachute canopy, so that the airflow can quickly fill the entire main parachute canopy.

2. The shed for a large parachute according to claim 1, characterized in that: The second round edge and the third round edge on the outer umbrella skirt are both locked.

3. The shed for a large parachute according to claim 1, characterized in that: The fourth round edge on the inner umbrella skirt is locked.

4. The shed for a large parachute according to claim 1, characterized in that: The umbrella rope buckle loop, the outer umbrella skirt buckle loop and the inner umbrella skirt buckle loop are all rope rings.

5. The shed for a large parachute according to claim 1, characterized in that: The inner umbrella skirt is evenly sewn with a plurality of reinforcement belts along the circumferential direction.

6. The shed for a large parachute according to claim 5, characterized in that: The bottom of each reinforcement belt is surrounded to form an inner umbrella skirt buckle loop, and the number of the reinforcement belts is n.

7. The shed for a large parachute according to claim 1, characterized in that: Let the diameter of the main parachute canopy after unfolding be D, let the diameter of the second circular edge of the outer umbrella skirt be Dw, Dw=1 / 10D~1 / 6D, let the diameter of the inner umbrella skirt after unfolding be Dn, Dn=1 / 3Dw~2 / 3Dw, and the circumference of the top hole be Dd, Dd=1 / 8Dn~1 / 6Dn, let the total length of the pull rope be L, L=n×(Dw-Dn)+1.

8. The shed for a large parachute according to claim 1, characterized in that: It also includes an air pressure sensor, which is used to sense the atmospheric pressure value in the main parachute canopy and convert the atmospheric pressure value into an electrical signal to transmit to the controller. The controller is used to receive the atmospheric pressure value electrical signal transmitted by the air pressure sensor. When the atmospheric pressure value electrical signal reaches a certain threshold, the controller outputs a control signal to the cutter, and the cutter cuts off the circumferential closing rope and the pull rope.

9. The shed for a large parachute according to claim 1, characterized in that: The drawstring is an elastic rope.

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