JPH058800A - Offshore recovery apparatus - Google Patents

Abstract

PURPOSE:To reduce aerodynamic drag when falling, to damp any shock when a splashdown and to prevent a recovering object from being soaked due to switch-back waves by mounting a splashdown device at the bottom of the recovering object from the space and the splashdown comprising a foldable main portion capable of unfolding in a cone-shape, etc. CONSTITUTION:When a recovering object 1 from the space or the like falls with a parachute 2 and reaches a given height and falling speed, an altimeter 17 confirms it and drawing members are released from the recovering object 1 to separate a cover 15 and draw a splashdown device 10. Simultaneously, gas pressure is injected from an accumulator 16b in the splashdown device 10 into a bunch-shaped member 12 and a landing damper 13 to unfold a main portion 11. The splashdown device 10 thereby forms a shallow circular cone shape itself to result in aerodynaically stable falling. Moreover, when splashdown on the sea surface 30, falling energy extends shock cords 14 and the main portion 11 to form deep shape, thereby damping any shock when the splashdown and preventing the recovering object from being soaked due to switch-back waves caused by the splashdown.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marine (including water) recovery device for a recovering body in the aerospace field, and in particular, it is capable of mitigating impact during recovery at sea and preventing the recovering body from getting wet with seawater or the like. The present invention relates to a marine recovery device.

[0002]

2. Description of the Related Art Generally, when recovering an object to be recovered from space, after decelerating by the earth's atmosphere, it is finally decelerated and descended by a parachute or the like to land on the ground or land on the sea surface.

When landing on the sea surface, as shown in FIG. 9, a large number of buoyant bodies 1 in addition to the parachute 2 are provided in the recovery body 1.
a is attached, and the buoyancy body 1a is inflated to collect the body 1.
However, the recovery body 1 is in a submerged state as shown in FIG. In addition, even if it is submerged in water, the part floating above the sea surface often gets wet with water due to waves. Reference numeral 30 indicates the water surface.

When the recovery unit is to be reused because it gets wet with seawater or water, it is necessary to carry out reassembly and function inspection after disassembling and cleaning, and the cost for reuse is new. Since this is equivalent to the case of production, this point was a bottleneck in constructing a system for collection and reuse.

In order to deal with this point, the recovery body 1 is seawater (water).
Attempts have been made to make the collection body water resistant in order to prevent it from being contaminated with water, but for that purpose it is necessary to have a sealed structure made of a material that is corrosion resistant to seawater (water). However, there is a problem in that the system as a whole loses its viability.

[0006]

As described above, in the conventional marine recovery system, it is necessary to impart water resistance to the recovery body itself in order to prevent the recovery body from being contaminated with seawater.

On the other hand, it can be easily assumed that the weight of the collecting body can be reduced if the collecting body can be collected without getting wet at the time of landing, but in that case, the impact at the time of landing can be alleviated, and after landing. However, unless it has sufficient buoyancy, it cannot be put to practical use.

The present invention is intended to provide a marine recovery device capable of satisfying the above-mentioned demands. Prior to water landing, a conical water landing device is discharged and deployed in front of the recovery body so as to land on water. It is also an object of the present invention to provide a marine recovery device that alleviates the impact of, and prevents the recovery body from directly contacting water.

[0009]

In order to achieve the above object, the marine recovery device of the present invention comprises a water landing device mounted on the bottom surface of a recovery body, and the water landing device can be deployed in a mortar shape. With a main body of a foldable thin film structure, a shock cord capable of holding the main body in a folded state, and a tuft formed of an annular airtight bag attached to an upper peripheral portion of the main body,
It is characterized in that it is composed of an air accumulator that stores the pressure gas supplied to the tufted body prior to landing of the recovery body.

[0010]

In the above-mentioned marine recovery device of the present invention, the main part of the water landing device constituted by the thin film structure is attached to the upper peripheral portion thereof, and the entire water landing device is operated by the action of the tuft state in which it is expanded by the pressure gas. It keeps the shape almost like a mortar and secures buoyancy on the water surface.

At the time of landing, the shock cord is extended by the falling energy to form a deep cone shape in the main body, so that the landing impact is alleviated and the collecting body is prevented from getting wet by water due to the switching action of the waves. Further, the shock cord is broken at a certain elongation to absorb the falling energy, prevent the water from unnecessarily penetrating into the water, and prevent the vertical movement thereafter.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A marine recovery device as an embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 (a) and 1 (b) are side views, FIG. 2 is a perspective view of a water landing device, and FIG. 2 is a schematic cross-sectional view of part A, FIG. 4 is a schematic cross-sectional view when landing, FIG. 5 is a schematic cross-sectional view of a burst valve, FIG. 6 is a side view when landing, and FIG. 7 is a side view of a modified example. 8 is a plan view of the same.

As shown in FIG. 1 (a), a parachute 2 is attached to the upper end surface of the collecting body 1, and a water landing device 10 is attached to the bottom surface of the collecting body 1, so that the collecting body 1 is descending. Due to the action of the parachute 2, the parachute 2 goes up and the water landing device 10 goes down to the posture shown in FIG. 1 (a).

The water landing device 10 is a tufted body 12 composed of a main body 11 having a thin film structure formed in a mortar shape as a whole, and a two-layer annular airtight bag attached to an upper peripheral portion of the main body 11. The landing buffer body 13 is formed on the inner bottom portion of the main body portion 11 by the diaphragm 20.

The main body 11 of the water landing device 10 is normally folded, and the folded state is a large number of shock cords 14.
Is attached to the bottom surface of the collecting body 1 while being held by being adhered to the fold portion, and is normally covered with the cap 15.

The water landing device 10 is further provided with air accumulators 16a and 16b. The air accumulator 16a stores the pressure gas (gas) that is supplied to the airtight bag forming the tuft 12 and expands the tuft 12, and the air accumulator 16b is supplied to the landing buffer tuft 13. A pressure gas (gas) for expanding the landing buffer body 13 is stored.

1 (a) and 1 (b), reference numeral 17 is a radio altimeter and reference numeral 18 is a drogue.

Reference numeral 19 in FIG. 4 denotes a burst valve, which is formed by covering a small hole 21 formed in the diaphragm 20 forming the landing buffer 13 with the burst film 22. (See Figure 5).

With the above-mentioned structure, the recovery body 1 falls from the sky in the posture shown in FIG. 1 (a) by the action of the parachute 2. Then, when it is confirmed by the radio altimeter 17 that the altitude and the falling velocity are preset,
The drogue 18 is released from the collecting body 1 and is thereby covered.
The stripping of 15 and the withdrawal of the water landing device 10 are performed, and at the same time, the gas pressure is injected from the air accumulators 16a and 16b into the tuft 12 and the landing buffer 13 to deploy the main body 11 of the water landing device 10. ..
Since the deployed landing gear has a shallow conical shape, it will drop aerodynamically and stably.

At the time of landing on the water surface 30, the shock cord 14 is expanded by the falling energy and the main body 11 of the water landing device 10 is expanded to form a deep conical shape. As shown in FIG. 6, it is possible to prevent the recovery body 1 from getting wet with water due to the return action of the waves 31 caused by landing. Further, since the fall energy is absorbed by the shock cord 14 breaking at a constant elongation, it is possible to prevent the shock cord 14 from unnecessarily penetrating into the water and to prevent the vertical movement of the water landing device 10 thereafter.

The water landing device 10 has a thin film structure,
The tufted body 12 attached to the upper peripheral portion thereof expands by the gas pressure to maintain the shape of the entire water landing device 10, and at the same time acts to secure the buoyancy on the water surface. Therefore, it is possible to hold the water landing device 10 in a state of floating on the water surface in the posture of being accommodated in.

The gas pressure at the time of expanding the main body portion 11 of the water landing device 10 is held in the air accumulators 16a and 16b, and this is stored in the tufts 12 and the landing buffer of the water landing device 10. In order to flow into the body 13, when the drogue 18 is discharged and the landing gear 10 is pulled out, a wire cord (not shown) is used to store the air accumulators 16a, 16a.
By arranging to open the valve (not shown) of b, the water landing device can be deployed without requiring a special control device. Further, in the case of landing on land, when the internal pressure of the landing cushioning chamber 13 increases due to landing, the burst film 22 is broken and the gas pressure in the landing cushioning chamber 13 is released to provide a buffering action.

Incidentally, the landing buffer body 13 may be omitted if it is intended only for landing.

Next, a modified example will be described with reference to FIGS.

In this modification, in addition to the above, the water landing device
The top 10 of the water landing device 10 is attached by using the phenomenon that the bottom surface of the water landing device 10 is deformed when landing. That is, in FIG. 7 and FIG. 8, an annular storage bag 23 is attached to the outside of the tuft 12 so that the storage membrane 25 can be stored in a folded state. The top membrane 25 is divided into two sheets each having an area capable of covering the upper surface of the annular portion formed by the tufted body 12 by approximately half (accurately, partially polymerized) when unfolded, and the storage bag 23 It is folded and stored in, and one end of a pullout rope 24 for pulling out the sky membrane 25 is attached to the bottom surface of the water landing attachment 10.

Upon landing, the recovery body 1 sinks deeper than the water surface 30 (reference numeral 1'in FIG. 7 shows this state), and the bottom surface shape of the main body 11 of the water landing attachment 10 is deformed. Due to this deformation, the pull-out cord 24 is pulled (reference numeral 24 'in FIG. 7 shows that state), and the sky membrane 25 stored in the storage bag 23 is shown.
Is drawn out, and the top film 25 thus drawn covers the upper surface of the collecting body 1 (see FIG. 8), so that it is possible to prevent the collecting body 1 from being wet by waves after landing.

As described above, in the marine recovery apparatus of this embodiment, the water impact when the recovery body 1 is recovered at the water surface 30 can be reduced by the energy absorption due to the breakage of the shock cord 14, and further, at the time of the water contact. It is possible to prevent scattering of the waves to the recovery body by diverting the waves generated in the surroundings. Furthermore, in the case of adopting a configuration in which the ceiling film 25 is developed by utilizing the penetration operation of the collecting body 1 into water, it is possible to prevent the collecting body 1 from getting wet due to the influence of waves after landing.

Since the drop speed decreases due to an increase in air resistance due to the deployment of the water landing device, there is an effect that the parachute becomes unnecessary when the initial drop speed is relatively low.

[0029]

As described in detail above, according to the marine recovery apparatus of the present invention, the following effects and advantages can be obtained. (1) A tuft that is attached to the upper peripheral part of the main body and expands by pressure gas when landing holds the main body of the water landing device in a substantially mortar-like shape containing a recovery body inside and Since the recovery device can be maintained in a substantially submerged state on the water surface by the buoyancy of the shaped body, the recovery body can be prevented from getting wet. (2) Since the water landing device has a thin film structure and is composed of a foldable main body and a shrinkable tuft, it is lightweight and compact, and is advantageous in application to a recovery body in the aerospace field. .. (3) Since the main body part is held in a folded state, a large cushioning force can be obtained due to the expansion and breakage of the shock cord, and a marine recovery device having a large cushioning force as a whole can be obtained.

[Brief description of drawings]

1A and 1B are schematic side views of a marine recovery device as an embodiment of the present invention.

FIG. 2 is a perspective view of the water landing device.

FIG. 3 is a schematic cross-sectional view of part A of FIG.

FIG. 4 is a schematic cross-sectional view at the time of landing.

FIG. 5 is a schematic sectional view of the burst valve.

FIG. 6 is a side view at the time of landing.

FIG. 7 is a side view of the modification.

8 is a plan view of that of FIG. 7. FIG.

FIG. 9 is a side view of a conventional marine recovery device.

FIG. 10 is a schematic side view at the time of landing.

[Explanation of symbols] 1 recovery body 2 parachute 10 water landing device 11 main body 12 tufted body 14 shock cord 15 caps 16a, 16b air accumulator 17 radio altimeter 18 drogue 19 burst valve 20 diaphragm 30 water surface

Claims (1)

Claim: What is claimed is: 1. A marine recovery device, comprising a water landing device mounted on the bottom surface of a collecting body, the water landing device being a mortar-like deployable main part of a foldable thin film structure. A shock cord capable of holding the main body portion in a folded state, a tuft formed of an annular airtight bag attached to an upper peripheral portion of the main body portion, and the tuft described above prior to landing of the recovery body. A marine recovery device comprising a gas accumulator that stores pressurized gas supplied to the sheet.