Adjustable net bag pressing and releasing device

Abstract

The present invention is an adjustable net bag compression and release device. It includes a net bag, an inner liner, a compression cloth, a bow-shaped locking rod made of soft metal, a locking nut, a rope cutter, a set screw, a rope cutter base and a compression rod with a circular through hole in the middle; the net bag is set outside the inner liner, the outside of the net bag is compressed by the compression cloth, compression rods are provided at both ends of the compression cloth, the net bag is provided with a rope cutter base at the opening of the compression cloth, and a rope cutter is provided on the rope cutter base; the bow-shaped locking rod is composed of a middle bare rod section, arc-shaped transition sections on both sides of the bare rod section, and threaded sections outside the two arc-shaped transition sections, the bow-shaped locking rod bare rod section is located in the rope cutter, and the two sides of the bow-shaped locking rod respectively pass through the circular through holes of the compression rod and are threadedly matched with the hexagonal locking nut, and a set screw is provided on the side of the locking nut. The present invention realizes the rigid compression and release of the net bag through the metal bow-shaped locking rod and the locking nut, and solves the problems of easy breakage and failure existing in the spring and tether tightening method.

Description

Technical Field

[0001] The invention belongs to the field of space debris removal, and in particular relates to an adjustable net bag pressing and releasing device. Background Art

[0002] Due to the increasing number of space debris in orbit, the operational safety of spacecraft and space stations in orbit is currently under serious threat. The active removal methods of space debris mainly include rigid capture and flexible capture. Rope net capture, as a flexible capture method with small size, light weight and large capture range, has been widely studied. However, in the harsh environment of space launch vibration, if the rope net bag is not compressed before launch, the rope net will be thrown out of the net bag and scattered, and the capture task cannot be completed. Before the launch of the rope net, the compressed net bag needs to be released, otherwise the rope net withdrawal resistance is too large, which will lead to poor deployment of the rope net. The commonly used net bag compression method is to compress it by rope and spring. However, after the rope net is stored in orbit for a period of time, the rope and spring will undergo stress creep, which makes the rope easy to break and the spring easy to lose elasticity. Therefore, a highly reliable net bag compression and release device is urgently needed. Summary of the invention

[0003] The purpose of the present invention is to provide an adjustable net bag compression and release device to solve the problem that the rope net bag needs to be compressed during storage and released in advance before launch in the current rope net capture method for space debris.

[0004] The technical solution for achieving the purpose of the present invention is: an adjustable net bag pressing and releasing device, comprising a net bag, an inner liner, a pressing cloth, a bow-shaped locking rod made of soft metal, a locking nut, a rope cutter, a set screw, a rope cutter base and a pressing rod with a circular through hole in the middle;

[0005] The net bag is arranged outside the inner lining tube, and the outside of the net bag is compressed by a compression cloth. Compression rods are provided at both ends of the compression cloth. A rope cutter base is provided at the opening of the compression cloth of the net bag, and a rope cutter is provided on the rope cutter base. The bow-shaped locking rod is composed of a middle bare rod section, arc-shaped transition sections on both sides of the bare rod section, and threaded sections outside the two arc-shaped transition sections. The bare rod section of the bow-shaped locking rod is located in the rope cutter, and both sides of the bow-shaped locking rod respectively pass through the circular through holes of the compression rod and cooperate with the hexagonal locking nut threads. A set screw is provided on the side of the locking nut for tightening the locking nut and the bow-shaped locking rod.

[0006] Furthermore, the bow-shaped locking rod is made of 2A12 aluminum alloy.

[0007] Furthermore, the inner lining tube is a metal lining component used to support the mesh bag. The main body is cylindrical and has a flange at the bottom. The cylindrical main body is provided with waist-shaped weight-reducing holes, and the bottom flange is provided with weight-reducing holes. The mesh bag is arranged on the outer periphery of the inner lining tube and the bottom is connected to the bottom flange through a connecting rope.

[0008] Furthermore, the pressing cloth is an annular open cloth with cylindrical holes sewn at both ends of the pressing cloth. After the pressing rod is placed in the cylindrical hole, the upper and lower ends of the cylindrical hole are closed and sewn to prevent the pressing rod from falling; a circular through hole is provided at a position on the cylindrical hole corresponding to the circular through hole of the pressing rod.

[0009] Furthermore, the length of the locking nut is not less than half the length of the threaded section of the bow-shaped locking rod; an arc-shaped rope threading hole is opened on the side wall of the locking nut, and the connecting rope passes through the rope threading hole to connect the locking nut to the compression cloth.

[0010] Furthermore, the rope cutter base is provided with a rope threading hole and is connected to the net bag via a connecting rope.

[0011] Furthermore, the rope cutter is detachably arranged on the rope cutter base. The rope cutter is a pyrotechnic rope cutting device. After power is supplied, the igniter inside the rope cutter ignites the gunpowder. The gunpowder gas generated by the burning of the gunpowder pushes the internal cutter to cut off the bow-shaped locking rod.

[0012] Furthermore, the compression cloth is connected to the net bag at a position relative to the opening end through a connecting rope.

[0013] Furthermore, the pressing rod is a cylindrical rod, and the diameter of the middle through hole is larger than the diameter of the bow-shaped locking rod.

[0014] Compared with the prior art, the present invention has the following significant advantages:

[0015] The present invention adopts a rigid method of a bow-shaped locking rod and a locking nut to compress the net bag used to store the rope net; compared with flexible compression methods such as ropes, the rope is connected to the compression rod by a knot, and the knot has the risk of loosening during vibration; in comparison, the rigid method of the bow-shaped locking rod and the locking nut is more reliable.

[0016] The bow-shaped locking rod method is used. Compared with ropes and springs that will experience creep, atomic oxygen corrosion and elasticity loss after long-term storage, the material properties of metal rods will not change drastically after long-term storage, and they have higher reliability.

[0017] The locking nut and the bow-shaped locking rod are used for compression. The tightness of the net bag can be adjusted by adjusting the position of the locking nut relative to the starting end of the thread of the bow-shaped locking rod, making it more convenient to adjust the tightness of the net bag and more reliable for compression. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the adjustable net bag pressing and releasing device of the present invention.

[0019] Figure 2 This is the net bag bundling and fixing method of the present invention.

[0020] Figure 3 This is the bundling and fixing method of the compression cloth of the present invention.

[0021] Figure 4 This is the structural shape of the inner liner of the present invention.

[0022] Figure 5 This is the structural appearance of the bow-shaped locking rod of the present invention.

[0023] Figure 6 This is the structural appearance of the locking nut of the present invention.

[0024] Description of reference numerals:

[0025] 1-net bag, 2-inner lining tube, 3-pressing cloth, 4-bow locking rod, 5-locking nut, 6-rope cutter, 7-setting screw, 8-rope cutter base, 9-pressing rod, 10-connecting rope. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0027] like Figure 1-6 As shown, an adjustable net bag compression and release device. The device is used for compression and release of a space rope net bag, and comprises a net bag 1, an inner liner 2, a compression cloth 3, a bow-shaped locking rod 4, a locking nut 5, a rope cutter 6, an adjustment screw 7, a rope cutter base 8, a compression rod 9 and a connecting rope 10.

[0028] The net bag 1 is a storage device for the rope net, which is mostly an annular barrel shape; the inner liner 2 is a metal lining part of the net bag 1, which is used to support the net bag 1 and prevent the net bag 1 from collapsing. The wall of the liner 2 has multiple waist-shaped grooves to reduce weight. The bottom of the inner liner 2 is a flange plate with a rope hole. The net bag 1 and the inner liner 2 are connected by a connecting rope 10 to prevent the net bag 1 from axially moving along the inner liner 2; the pressing cloth 3 is an annular open cloth, and cylindrical holes are sewn at both ends of the pressing cloth 3. After the pressing rod 9 is placed in the cylindrical hole, the upper and lower ends of the cylindrical hole are closed and sewn to prevent the pressing rod from 9 falls; the overall shape of the bow-shaped locking rod 4 is a bow-shaped rod, the middle part is a bare rod, passing through the rope cutter 6 hole, the two side parts are provided with external threads and pass through the center hole of the clamping rod 9, the external threads of the two side parts are used to install the locking screws, the bow-shaped locking rod 4 is made of soft metal (such as 2A12 aluminum alloy, and its diameter and other dimensional parameters need to be adjusted accordingly in combination with the cutting force of the rope cutter to facilitate cutting; the cross section of the locking nut 5 is hexagonal, with a threaded hole in the middle, and the length of the locking nut 5 is about half the length of the threaded section of the bow-shaped locking rod 4, so as to achieve a larger The friction force prevents the locking nut 5 from loosening. The side wall of the locking nut 5 is provided with an arc-shaped rope threading hole for threading the rope and fixing it with the compression cloth 3 to ensure that after the net bag 1 is unlocked, the locking nut 5 and the cut bow-shaped locking rod 4 are still connected to the compression cloth 3 to prevent it from becoming a new space debris; the rope cutter 6 is a pyrotechnic rope cutting device. After power is supplied, the igniter inside it ignites the gunpowder, and the gunpowder gas generated by the combustion of the gunpowder pushes the internal cutter to cut off the bow-shaped locking rod 4; the adjusting set screw 7 is a standard product, which is installed after the locking nut 5 is installed in place. The circumferential threaded holes of the locking nut 5 play a further anti-loosening role; the rope cutter base 8 is used to install and fix the rope cutter 6, and has threaded holes on it for installing the rope cutter 6. The four corner points of the rope cutter base 8 are provided with rope holes for connecting and fixing the net bag 1 through the connecting rope 10; the clamping rod 9 is a cylindrical rod, and a circular hole with a diameter slightly larger than the bow-shaped locking rod 4 is opened in the center; the connecting rope 10 is used to connect the rope cutter base 8 and the net bag 1, the clamping cloth 3 is connected to the net bag 1, the net bag 1 is connected to the inner lining tube 2, and the locking nut 5 is connected to the clamping cloth 3.

[0029] The compression and release principle is as follows:

[0030] After the rope net is gathered, the net bag 1 is put on the inner liner 2 from top to bottom, the bottom surface of the net bag 1 is fitted with the upper surface of the flange of the inner liner 2, and the bottom of the net bag 1 is connected and fixed to the inner liner 2 through the connecting rope 10. Then, the opening end of the pressing cloth 3 is connected and fixed to the net bag 1 through the connecting rope 10, and the four corners of the rope cutter base 8 are fixed to the net bag 1 through the connecting rope 10. The rope cutter 6 is screwed and installed on the rope cutter base 8 to ensure that the rope cutting hole of the rope cutter 6 is roughly located in the middle layer of the net bag 1. Then, the bow-shaped locking rod 4 is passed through the central circular hole of the cylindrical hole of the pressing cloth 3, the central circular hole of the pressing rod 9, and the rope cutting hole of the rope cutter 6 in sequence. Then, the locking nut 5 is installed on the bow-shaped locking rod 4, and the compression of the net bag 1 is adjusted by adjusting the position of the locking nut 5. After the adjustment is completed, the adjusting set screw 7 is installed to further prevent loosening. Before the rope net is launched, the rope cutter 6 is powered, and the rope cutter 6 cuts off the bow-shaped locking rod 4. At this time, the locking nut 5 and the cut bow-shaped locking rod 4 are still connected to the pressing cloth 3 to prevent them from becoming new space debris.

Claims

1. An adjustable net bag pressing and releasing device, characterized in that: It comprises a net bag (1), an inner lining tube (2), a pressing cloth (3), a bow-shaped locking rod (4) made of soft metal, a locking nut (5), a rope cutter (6), a set screw (7), a rope cutter base (8) and a pressing rod (9) with a circular through hole in the middle; The net bag (1) is sleeved outside the inner liner (2), and the outside of the net bag (1) is compressed by a compression cloth (3). Compression rods (9) are provided at both ends of the compression cloth (3). A rope cutter base (8) is provided at the opening of the compression cloth on the net bag (1), and a rope cutter (6) is provided on the rope cutter base (8); the bow-shaped locking rod (4) is composed of a middle bare rod section, arc-shaped transition sections on both sides of the bare rod section, and threaded sections outside the two arc-shaped transition sections. The bare rod section of the bow-shaped locking rod (4) is located inside the rope cutter (6). Both sides of the bow-shaped locking rod (4) respectively pass through the circular through holes of the compression rod (9) and are threadedly matched with a hexagonal locking nut (5). A set screw (7) is provided on the side of the locking nut (5) for fastening the locking nut and the bow-shaped locking rod; The inner lining cylinder (2) is a metal inner lining member used to support the net bag (1), the main body is cylindrical, a flange is provided at the bottom, waist-shaped weight-reducing holes are provided on the cylindrical main body, and a weight-reducing hole is provided on the bottom flange. After the net bag (1) is sleeved on the outer periphery of the inner lining cylinder, the bottom is connected to the bottom flange through a connecting rope (10); The pressing cloth (3) is an annular open cloth, and cylindrical holes are sewn at both ends of the pressing cloth (3). After the pressing rod (9) is placed in the cylindrical hole, the upper and lower ends of the cylindrical hole are closed and sewn to prevent the pressing rod (9) from falling off; a circular through hole is provided on the cylindrical hole at a position corresponding to the circular through hole of the pressing rod (9).

2. The device according to claim 1, characterized in that The material of the bow-shaped locking rod (4) is 2A12 aluminum alloy.

3. The device according to claim 2, characterized in that The length of the locking nut (5) is not less than half the length of the threaded section of the bow-shaped locking rod (4); an arc-shaped rope threading hole is formed on the side wall of the locking nut (5), and the connecting rope passes through the rope threading hole to connect the locking nut (5) to the pressing cloth (3).

4. The device according to claim 1, characterized in that The rope cutter base (8) is provided with a rope threading hole and is connected to the net bag (1) via a connecting rope (10).

5. The device according to claim 1, characterized in that The rope cutter (6) is detachably arranged on a rope cutter base (8). The rope cutter (6) is a pyrotechnic rope cutting device. After power is supplied, an igniter inside the rope cutter (6) ignites gunpowder, and gunpowder gas generated by the combustion of gunpowder pushes the internal cutter to cut off the bow-shaped locking rod (4).

6. The device according to claim 1, characterized in that The compression cloth (3) is connected to the net bag (1) at a position relative to the opening end via a connecting rope (10).

7. The device according to claim 1, characterized in that The pressing rod (9) is a cylindrical rod, and the diameter of the through hole in the middle is larger than the diameter of the bow-shaped locking rod (4).

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