Sealing device for recovering rocket at sea and method of using the same

Abstract

The present invention belongs to the field of rocket recovery, and in particular to a sealing device for recovering rockets at sea and a method of using the same. The following scheme is proposed, which includes a rocket sealing and transporting mechanism movably mounted on an offshore landing platform, a rotating platform with a rotating drive mechanism is rotatably sleeved on the top of the outer wall of the offshore landing platform, a rocket sealing and transporting mechanism is movably mounted on one side of the rotating platform through two fixed blocks and a locking latch, and a counterweight box is mounted on the other side of the rotating platform; the rocket sealing and transporting mechanism includes a loading cylinder with a sealing gate at one opening, and an auxiliary fixing mechanism with multiple clamping mechanisms is installed inside the loading cylinder. This device can quickly assist in clamping and fixing a rocket that has landed at any landing point on the offshore landing platform, and then load it into the loading cylinder for transportation, so that the problem of rocket tipping will not occur on the way back to the port when the recovered rocket platform is recovered, and the transportation safety is high.

Description

Technical Field

[0001] The present invention relates to the field of rocket recovery technology, and in particular to a sealing device for recovering rockets at sea and a method of using the same. Background Art

[0002] Rocket recovery technology is a shining pearl in the field of aerospace technology and a comprehensive reflection of the strength of aerospace technology. Therefore, it has also received great attention from major aerospace powers.

[0003] During the landing process, the recoverable section of the rocket will unfold its own landing legs to cushion the impact of landing on the recovery platform and provide temporary support, and will be fixed to the offshore landing platform through a rocket sealing device, and then transported by dragging the offshore landing platform. The Chinese patent with patent number CN115265290B discloses a sealing device for recovering rockets at sea, which can be quickly put into place after the rocket lands on the recovery deck to complete the sealing operation of the rocket; wireless remote control is used throughout the process to fix the rocket body that has landed on the recovery platform, and the rocket body is fixed to facilitate subsequent series of operations, greatly improving the safety of recovering rockets and greatly reducing the risk of rocket tipping accidents on the way back to the port of the recovery platform. This vertical transportation method is also prone to the risk of rocket tipping during transportation, and the overall handling and transportation intensity of the landing platform and the rocket is large, and the transportation speed is slow. For this reason, we propose a sealing device for recovering rockets at sea and a method for using the same. Summary of the invention

[0004] The invention provides a sealing device for recovering a rocket at sea and a method for using the same, which solves the problem of a rocket dumping accident occurring when a recovering rocket platform is returning to a port as mentioned in the background art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A sealing device for recovering rockets at sea, comprising a rocket sealing and transporting mechanism movably mounted on an offshore landing platform, wherein the bottom end of the offshore landing platform is connected to a gravity anchor via a plurality of anchor chains, a rotating platform with a rotating driving mechanism is rotatably sleeved on the top of the outer wall of the offshore landing platform, the rocket sealing and transporting mechanism is movably mounted on one side of the rotating platform via two fixing blocks and a locking latch, and a counterweight box is mounted on the other side of the rotating platform;

[0007] The rocket sealing and transporting mechanism comprises a loading cylinder with a sealing gate at an opening on one side, and an auxiliary fixing mechanism with multiple clamping mechanisms is installed inside the loading cylinder.

[0008] As a preferred embodiment, the auxiliary fixing mechanism 1 includes a support frame slidably connected to the inside of the loading cylinder and a fixed seat near the opening of the loading cylinder, a motor 2 is installed on one side of the support frame, the output shaft of the motor 2 is connected to a screw rod rotatably connected to the inside of the support frame, the screw rod is spirally connected to the fixed seat, a swing frame is hinged on one side of the support frame, a plurality of telescopic rods 3 are hinged between the swing frame and the support frame, a plurality of clamping mechanisms are installed on the side wall of the swing frame, and a plurality of support pulleys are installed on the bottom end of one side of the support frame that moves out of the loading cylinder.

[0009] As a preferred embodiment, grooves are provided on both sides of the bottom end of the loading cylinder, buoyancy chambers are provided in the grooves, an extension portion is provided in the middle position of the bottom end of the loading cylinder, two mounting holes are provided on the extension portion, and a telescopic rod five is hinged between each mounting hole and the two buoyancy chambers.

[0010] As a preferred embodiment, through holes are opened on both sides of the buoyancy chamber, and buoyancy cylinders are slidably connected in the through holes. A double-headed telescopic rod is installed inside the buoyancy chamber, and the output shaft of the double-headed telescopic rod is connected to the buoyancy cylinder.

[0011] As a preferred embodiment, sliding blocks are installed on both sides of the support frame, and sliding rails cooperating with the sliding blocks are installed on both sides of the inner wall of the loading cylinder.

[0012] As a preferred embodiment, it also includes an auxiliary positioning mechanism installed on the rotating platform, the auxiliary positioning mechanism includes two symmetrically arranged guide limit plates, one end of the guide limit plate is fixedly connected to the rotating platform, two U-shaped limit frames are slidably inserted between the two guide limit plates, a cross bar is connected between the two limit frames, and a telescopic rod is installed between the cross bar and the guide limit plate.

[0013] As a preferred embodiment, the rotating drive mechanism includes an electric motor 1 installed at the edge of the offshore landing platform, the output shaft of the electric motor 1 is connected to a driving gear, and a ring-shaped tooth mouth is provided at the bottom end extension of the rotating platform, and the tooth mouth is meshed with the driving gear.

[0014] As a preferred embodiment, the clamping mechanism includes a U-shaped fixed frame, a T-shaped sliding member is slidably inserted on the side wall of the fixed frame, two tension springs are connected between the T-shaped sliding member and the outer wall of the fixed frame, the other end of the T-shaped sliding member is fixedly connected to a movable plate slidably connected to the inside of the fixed frame, two springs are connected between the movable plate and the fixed frame, two symmetrically arranged clamping claws are hinged on the other side wall of the movable plate, and four telescopic rods are hinged between the clamping claws and the movable plate.

[0015] As a preferred embodiment, an auxiliary sealing mechanism 2 is installed on the counterweight box, and the structure of the auxiliary sealing mechanism 2 is the same as that of the auxiliary fixing mechanism 1.

[0016] The method for using the above-mentioned sealing device for recovering a rocket at sea comprises the following steps:

[0017] S1: The rocket sealing and transporting mechanism is mounted on the rotating platform through a fixing block and a locking pin, and then the rocket sealing and transporting mechanism is further positioned and fixed through an auxiliary positioning mechanism;

[0018] S2: The auxiliary sealing mechanism 2 and the auxiliary fixing mechanism 1 on the rocket sealing and transport mechanism are both unfolded, and the swing frames thereon are erected and then moved to the edge position to wait for the rocket to land;

[0019] S3: After the rocket successfully lands on the offshore landing platform, the rotary drive mechanism drives the rotating platform and the components thereon to rotate, so that the rocket, the auxiliary sealing mechanism 2 and the rocket sealing and transport mechanism are located on the same vertical plane;

[0020] S4: The clamping mechanisms on the auxiliary sealing mechanism 2 and the auxiliary fixing mechanism 1 are close to the rocket and clamp it. After clamping, the rocket is flipped to a horizontal state by using the action of the telescopic rod 3.

[0021] S5: The clamping mechanism on the auxiliary sealing mechanism 2 releases the rocket and returns to its original position, and the auxiliary fixing mechanism 1 drags the rocket into the loading cylinder on the rocket sealing and transporting mechanism and seals it through the sealing gate;

[0022] S501: When the auxiliary fixing mechanism drags the rocket into the loading tube on the rocket sealing and transporting mechanism, water is simultaneously injected into the counterweight box to increase the weight, so as to maintain the balance stability of both sides of the offshore landing platform when the rocket moves horizontally to one side;

[0023] S6: Pull out the locking pin from the fixing block, and the auxiliary positioning mechanism no longer supports and fixes the rocket sealing and transporting mechanism, so that the rocket sealing and transporting mechanism is separated from the rotating platform;

[0024] S7: Control the two buoyancy chambers at the bottom of the rocket sealing and transporting mechanism to unfold under the action of the telescopic rod 5, and at the same time, the buoyancy tube is extended under the action of the double-headed telescopic rod, and then the rocket sealing and transporting mechanism can be dragged and transported through the hull.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention proposes a sealing device for recovering a rocket at sea. By setting a rotating platform, an offshore landing platform, and a rotating drive mechanism, after the rocket lands on the offshore landing platform, the rocket sealing and transporting mechanism can be quickly rotated to the side of the rocket, and the rocket can be auxiliary clamped and fixed to prevent it from tipping over on the offshore landing platform. The rocket can be quickly clamped and fixed at any landing point on the offshore landing platform.

[0027] 2. The present invention proposes a sealing device for recovering rockets at sea. By setting a rocket sealing and transporting mechanism, the rocket can be laid down horizontally, loaded into a sealed loading tube, and then transported horizontally. By adopting the horizontal transportation method, the rocket will not fall over, collide or be damaged, and the rocket transportation safety is high;

[0028] At the same time, the rocket sealing and transporting mechanism can be unfolded into a trimaran design during transportation. At the same time, through the setting of the buoyancy cylinder, the device has high stability during sea transportation and is not easily overturned by waves.

[0029] By setting up two sets of auxiliary sealing mechanisms, the stability of the rocket during the horizontal lowering process can be further improved.

[0030] This device can quickly assist in clamping and fixing a rocket that has landed at any landing point on the offshore landing platform, and then load it into a loading tube for transportation. There will be no problem of the rocket tipping over on the way back to the port when the rocket recovery platform is recovered, and the transportation safety is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of Embodiment 1 of a sealing device for recovering a rocket at sea proposed by the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of a rotating platform, a driving gear, a motor and a tooth opening of a sealing device for recovering a rocket at sea proposed by the present invention;

[0033] Figure 3 This is a schematic structural diagram of a rotating platform and an auxiliary positioning mechanism of a sealing device for recovering rockets at sea proposed by the present invention;

[0034] Figure 4 A schematic diagram of the structure of a rocket sealing mechanism of a sealing device for recovering a rocket at sea proposed by the present invention;

[0035] Figure 5 for Figure 4 Schematic diagram of the internal structure;

[0036] Figure 6 This is a schematic structural diagram of a rocket sealing mechanism of a rocket sealing device for recovering a rocket at sea proposed by the present invention when loaded with a rocket for transportation;

[0037] Figure 7 for Figure 6 Schematic diagram of the bottom view;

[0038] Figure 8 This is a schematic structural diagram of a clamping mechanism of a sealing device for recovering a rocket at sea proposed by the present invention;

[0039] Fig. 9This is a schematic structural diagram of Example 2 of a sealing device for recovering a rocket at sea proposed by the present invention.

[0040] In the figure: 1. Gravity anchor; 2. Anchor chain; 3. Counterweight box; 4. Rotating platform; 401. Tooth; 402. Driving gear; 403. Motor 1; 5. Offshore landing platform; 6. Auxiliary positioning mechanism; 601. Guide limit plate; 602. Telescopic rod 1; 603. Limit frame; 604. Cross bar; 7. Rocket sealing and transportation mechanism; 701. Loading cylinder; 702. Buoyancy cabin; 703. Telescopic rod 2; 704. Fixed block; 705. Support frame; 706. Sealing gate; 707. Connector; 708 , telescopic rod three; 709, swing frame; 710, clamping mechanism; 7101, clamping claw; 7102, telescopic rod four; 7103, movable plate; 7104, fixed frame; 7105, spring; 7106, T-shaped sliding member; 7107, tension spring; 711, extension part; 712, mounting hole; 713, telescopic rod five; 714, buoyancy cylinder; 715, supporting pulley; 716, screw rod; 717, fixed seat; 718, motor two; 719, slider; 720, slide rail; 8, auxiliary sealing mechanism two. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] Example 1: Reference Figure 1-7 , a sealing device for recovering rockets at sea, comprising a rocket sealing and transporting mechanism 7 movably mounted on an offshore landing platform 5, wherein the bottom end of the offshore landing platform 5 is connected to a gravity anchor 1 through a plurality of anchor chains 2, a rotating platform 4 with a rotating driving mechanism is rotatably sleeved on the top of the outer wall of the offshore landing platform 5, a rocket sealing and transporting mechanism 7 is movably mounted on one side of the rotating platform 4 through two fixing blocks 704 and a locking latch, a counterweight box 3 is mounted on the other side of the rotating platform 4, a water inlet valve and a water pump are mounted on the counterweight box 3, the weight of the counterweight box 3 is increased by opening the water inlet valve, and the weight of the counterweight box 3 is reduced by the water pump;

[0043] The rocket sealing and transportation mechanism 7 includes a loading cylinder 701 with a sealing gate plate 706 at an opening on one side, a telescopic rod 2 703 is fixed to the top of the loading cylinder 701, the output shaft of the telescopic rod 2 703 is connected to the sealing gate plate 706 through a connecting piece 707, the sealing gate plate 706 slides up and down and is sealed and connected to the opening of the loading cylinder 701, and an auxiliary fixing mechanism 1 with multiple clamping mechanisms 710 is installed inside the loading cylinder 701.

[0044] The auxiliary fixing mechanism 1 includes a support frame 705 slidably connected to the inside of the loading cylinder 701 and a fixed seat 717 near the opening of the loading cylinder 701, a motor 2 718 is installed on one side of the support frame 705, the output shaft of the motor 2 718 is connected to a screw rod 716 rotatably connected to the inside of the support frame 705, the screw rod 716 is spirally connected to the fixed seat 717, a swing frame 709 is hinged on one side of the support frame 705, a plurality of telescopic rods 3 708 are hinged between the swing frame 709 and the support frame 705, a plurality of clamping mechanisms 710 are installed on the side wall of the swing frame 709, and a plurality of supporting pulleys 715 are installed on the bottom end of one side of the support frame 705 moving out of the loading cylinder 701.

[0045] The bottom of the loading cylinder 701 is provided with grooves on both sides, and buoyancy chambers 702 are provided in the grooves. An extension portion 711 is provided in the middle of the bottom of the loading cylinder 701, and two mounting holes 712 are provided on the extension portion 711. A telescopic rod 713 is hinged between each mounting hole 712 and the two buoyancy chambers 702.

[0046] Through holes are opened on both sides of the buoyancy chamber 702, and buoyancy tubes 714 are slidably connected in the through holes. A double-headed telescopic rod is installed inside the buoyancy chamber 702, and the output shaft of the double-headed telescopic rod is connected to the buoyancy tube 714.

[0047] In order to further ensure the stability of the support frame 705 in the movement inside the loading cylinder 701, sliders 719 are installed on both sides of the support frame 705, and slide rails 720 that cooperate with the sliders 719 are installed on both sides of the inner wall of the loading cylinder 701.

[0048] It also includes an auxiliary positioning mechanism 6 installed on the rotating platform 4, and the auxiliary positioning mechanism 6 includes two symmetrically arranged guide limit plates 601. One end of the guide limit plate 601 is inclined to facilitate the rocket sealing and transportation mechanism 7 to enter the interior of the auxiliary positioning mechanism 6 through the two guide limit plates 601. One end of the guide limit plate 601 is fixedly connected to the rotating platform 4, and two U-shaped limit frames 603 are slidably inserted between the two guide limit plates 601. A cross bar 604 is connected between the two limit frames 603, and a telescopic rod 602 is installed between the cross bar 604 and the guide limit plate 601. Through the action of the telescopic rod 602, the cross bar 604 drives the limit frame 603 to move upward, and the rocket sealing and transportation mechanism 7 is lifted and fixed upward to ensure that the rocket sealing and transportation mechanism 7 will not be offset up and down from the rotating platform 4 during the process of loading the rocket.

[0049] The rotating drive mechanism includes a motor 403 installed at the edge of the offshore landing platform 5, the output shaft of the motor 403 is connected to the driving gear 402, and a ring-shaped tooth mouth 401 is provided at the bottom end extension of the rotating platform 4, and the tooth mouth 401 and the driving gear 402 are meshed with each other.

[0050] The method for using the above-mentioned sealing device for recovering a rocket at sea comprises the following steps:

[0051] S1: The rocket sealing and transporting mechanism 7 is mounted on the rotating platform 4 through the fixing block 704 and the locking pin, and then the rocket sealing and transporting mechanism 7 is further positioned and fixed through the auxiliary positioning mechanism 6;

[0052] S2: The auxiliary fixing mechanism on the rocket sealing and transporting mechanism 7 is unfolded, and the swing frame 709 on it is erected and then moved to the edge position to wait for the rocket to land;

[0053] S3: After the rocket successfully lands on the offshore landing platform 5, the rotary drive mechanism drives the rotating platform 4 and the components thereon to rotate, so that the rocket, the counterweight box 3 and the rocket sealing and transporting mechanism 7 are located on the same vertical plane;

[0054] S4: The clamping mechanisms 710 on the auxiliary fixing mechanism 1 are close to the rocket and clamp it. After clamping, the rocket is flipped to a horizontal state by using the action of the telescopic rod 3 708;

[0055] S5: The auxiliary fixing mechanism 1 drags the rocket into the loading cylinder 701 on the rocket sealing and transporting mechanism 7 and seals it through the sealing gate 706;

[0056] S501: When the auxiliary fixing mechanism 1 drags the rocket into the loading cylinder 701 on the rocket sealing and transporting mechanism 7, water is simultaneously injected into the counterweight box 3 to increase the weight, so as to maintain the balance stability of both sides of the offshore landing platform 5 when the rocket moves horizontally to one side;

[0057] S6: Pull out the locking pin from the fixing block 704, and at the same time, the auxiliary positioning mechanism 6 no longer supports and fixes the rocket sealing and transporting mechanism 7, so that the rocket sealing and transporting mechanism 7 is separated from the rotating platform 4;

[0058] S7: Control the two buoyancy chambers 702 at the bottom of the rocket sealing and transporting mechanism 7 to unfold under the action of the telescopic rod 5 713, and at the same time, the buoyancy tube 714 is extended under the action of the double-headed telescopic rod, and then the rocket sealing and transporting mechanism 7 can be dragged and transported through the hull.

[0059] like Figure 8As shown, in order to enhance the cushioning performance of the rocket during transportation, the clamping mechanism 710 includes a U-shaped fixed frame 7104, a T-shaped sliding member 7106 is slidably inserted on the side wall of the fixed frame 7104, two tension springs 7107 are connected between the T-shaped sliding member 7106 and the outer wall of the fixed frame 7104, the other end of the T-shaped sliding member 7106 is fixedly connected to a movable plate 7103 slidably connected to the inside of the fixed frame 7104, two springs 7105 are connected between the movable plate 7103 and the fixed frame 7104, and the movable plate 7103 is connected to the fixed frame 7104. Two symmetrically arranged clamping claws 7101 are hinged on the other side wall of 103, and telescopic rods 7102 are hinged between the clamping claws 7101 and the movable plate 7103. After the telescopic rods 7102 control the clamping claws 7101 to clamp and fix the rocket, during horizontal transportation, when the device vibrates up and down, the movable plate 7103 slides up and down in the fixed frame 7104, compressing the spring 7105. At the same time, the T-shaped sliding member 7106 further realizes the buffering effect of the clamping claw 7101 through the elastic force of the tension spring 7107.

[0060] Example 2, reference Fig. 9 , which is different from Example 1, in order to further enhance the stability of the rocket during the horizontal laying process, an auxiliary sealing mechanism 2 8 is installed on the counterweight box 3, and the auxiliary sealing mechanism 2 8 has the same structure as the auxiliary fixing mechanism 1.

[0061] The method for using the above-mentioned sealing device for recovering a rocket at sea comprises the following steps:

[0062] S1: The rocket sealing and transporting mechanism 7 is mounted on the rotating platform 4 through the fixing block 704 and the locking pin, and then the rocket sealing and transporting mechanism 7 is further positioned and fixed through the auxiliary positioning mechanism 6;

[0063] S2: The auxiliary sealing mechanism 2 8 and the auxiliary fixing mechanism 1 on the rocket sealing and transporting mechanism 7 are both unfolded, and the swing frame 709 thereon is erected and then moved to the edge position to wait for the rocket to land;

[0064] S3: After the rocket successfully lands on the offshore landing platform 5, the rotary drive mechanism drives the rotating platform 4 and the components thereon to rotate, so that the rocket, the auxiliary sealing mechanism 2 8 and the rocket sealing and transporting mechanism 7 are located on the same vertical plane;

[0065] S4: The auxiliary sealing mechanism 2 8 and the clamping mechanism 710 on the auxiliary fixing mechanism 1 are close to the rocket and clamp it. After clamping, the rocket is turned over to a horizontal state by using the action of the telescopic rod 3 708;

[0066] S5: The clamping mechanism 710 on the auxiliary sealing mechanism 2 8 releases the rocket and returns to its original position, and the auxiliary fixing mechanism 1 drags the rocket into the loading cylinder 701 on the rocket sealing and transporting mechanism 7 and seals it through the sealing gate 706;

[0067] S501: When the auxiliary fixing mechanism 1 drags the rocket into the loading cylinder 701 on the rocket sealing and transporting mechanism 7, water is simultaneously injected into the counterweight box 3 to increase the weight, so as to maintain the balance stability of both sides of the offshore landing platform 5 when the rocket moves horizontally to one side;

[0068] S6: Pull out the locking pin from the fixing block 704, and at the same time, the auxiliary positioning mechanism 6 no longer supports and fixes the rocket sealing and transporting mechanism 7, so that the rocket sealing and transporting mechanism 7 is separated from the rotating platform 4;

[0069] S7: Control the two buoyancy chambers 702 at the bottom of the rocket sealing and transporting mechanism 7 to unfold under the action of the telescopic rod 5 713, and at the same time, the buoyancy tube 714 is extended under the action of the double-headed telescopic rod, and then the rocket sealing and transporting mechanism 7 can be dragged and transported through the hull.

[0070] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sealing device for recovering a rocket at sea, comprising a rocket sealing and transporting mechanism (7) movably mounted on an offshore landing platform (5), characterized in that: The bottom end of the offshore landing platform (5) is connected to a gravity anchor (1) via a plurality of anchor chains (2); a rotating platform (4) having a rotating drive mechanism is rotatably sleeved on the top of the outer wall of the offshore landing platform (5); a rocket sealing and transporting mechanism (7) is movably mounted on one side of the rotating platform (4) via two fixing blocks (704) and a locking latch; and a counterweight box (3) is mounted on the other side of the rotating platform (4); The rocket sealing and transporting mechanism (7) comprises a loading cylinder (701) having a sealing gate (706) at one opening, and an auxiliary fixing mechanism (1) having a plurality of clamping mechanisms (710) is installed inside the loading cylinder (701); The auxiliary fixing mechanism 1 comprises a support frame (705) slidably connected to the inside of the loading cylinder (701) and a fixing seat (717) near the opening of the loading cylinder (701); a second motor (718) is installed on one side of the support frame (705); the output shaft of the second motor (718) is connected to a screw rod (716) rotatably connected to the inside of the support frame (705); the screw rod (716) is connected to the fixing seat (717) by a spiral transmission; a swing frame (709) is hingedly connected to one side of the support frame (705); a plurality of telescopic rods (708) are hingedly connected between the swing frame (709) and the support frame (705); a plurality of clamping mechanisms (710) are installed on the side wall of the swing frame (709); and a plurality of supporting pulleys (715) are installed on the bottom end of one side of the support frame (705) moving out of the loading cylinder (701); Grooves are provided on both sides of the bottom end of the loading cylinder (701), buoyancy chambers (702) are provided in the grooves, an extension portion (711) is provided in the middle of the bottom end of the loading cylinder (701), two mounting holes (712) are provided on the extension portion (711), and a telescopic rod (713) is hinged between each mounting hole (712) and the two buoyancy chambers (702).

2. The sealing device for recovering a rocket at sea according to claim 1, characterized in that: Through holes are opened on both sides of the buoyancy chamber (702), and buoyancy tubes (714) are slidably connected in the through holes. A double-headed telescopic rod is installed inside the buoyancy chamber (702), and the output shaft of the double-headed telescopic rod is connected to the buoyancy tube (714).

3. The sealing device for recovering rockets at sea according to claim 1, characterized in that: Slide blocks (719) are installed on both sides of the support frame (705), and slide rails (720) that cooperate with the slide blocks (719) are installed on both sides of the inner wall of the loading cylinder (701).

4. The sealing device for recovering a rocket at sea according to claim 1, characterized in that: The invention also comprises an auxiliary positioning mechanism (6) mounted on the rotating platform (4), the auxiliary positioning mechanism (6) comprising two symmetrically arranged guide limit plates (601), one end of the guide limit plate (601) being fixedly connected to the rotating platform (4), two U-shaped limit frames (603) being slidably inserted between the two guide limit plates (601), a cross bar (604) being connected between the two limit frames (603), and a telescopic rod (602) being installed between the cross bar (604) and the guide limit plate (601).

5. The sealing device for recovering rocket at sea according to claim 1, characterized in that: The rotary drive mechanism comprises a motor 1 (403) installed at the edge of the offshore landing platform (5); the output shaft of the motor 1 (403) is connected to a driving gear (402); a ring-shaped tooth opening (401) is provided at an extension of the bottom end of the rotating platform (4); the tooth opening (401) and the driving gear (402) are meshed with each other.

6. The sealing device for recovering rocket at sea according to claim 1, characterized in that: The clamping mechanism (710) comprises a U-shaped fixed frame (7104), a T-shaped sliding member (7106) is slidably inserted on the side wall of the fixed frame (7104), two tension springs (7107) are connected between the T-shaped sliding member (7106) and the outer wall of the fixed frame (7104), the other end of the T-shaped sliding member (7106) is fixedly connected to a movable plate (7103) slidably connected to the inside of the fixed frame (7104), two springs (7105) are connected between the movable plate (7103) and the fixed frame (7104), two symmetrically arranged clamping claws (7101) are hinged on the other side wall of the movable plate (7103), and a telescopic rod four (7102) is hinged between the clamping claws (7101) and the movable plate (7103).

7. The sealing device for recovering a rocket at sea according to claim 2, characterized in that: The counterweight box (3) is provided with an auxiliary sealing mechanism 2 (8), and the auxiliary sealing mechanism 2 (8) has the same structure as the auxiliary fixing mechanism 1.

8. A method for using the sealing device for recovering a rocket at sea as claimed in claim 7, characterized in that: The following steps are involved: S1: The rocket sealing and transporting mechanism (7) is mounted on the rotating platform (4) via a fixing block (704) and a locking pin, and then the rocket sealing and transporting mechanism (7) is further positioned and fixed via an auxiliary positioning mechanism (6); S2: The auxiliary sealing mechanism 2 (8) and the auxiliary fixing mechanism 1 on the rocket sealing and transporting mechanism (7) are both unfolded, and the swing frame (709) thereon is erected and then moved to the edge position to wait for the rocket to land; S3: After the rocket successfully lands on the offshore landing platform (5), the rotary drive mechanism drives the rotating platform (4) and the components thereon to rotate, so that the rocket, the auxiliary sealing mechanism 2 (8) and the rocket sealing and transport mechanism (7) are located on the same vertical plane; S4: The auxiliary sealing mechanism 2 (8) and the clamping mechanism (710) on the auxiliary fixing mechanism 1 are both close to the rocket and clamp it to fix it. After clamping and fixing, the action of the telescopic rod 3 (708) is used to turn the rocket to a horizontal state; S5: the clamping mechanism (710) on the auxiliary sealing mechanism 2 (8) releases the rocket and returns it to its original position, and the auxiliary fixing mechanism 1 drags the rocket into the loading cylinder (701) on the rocket sealing and transporting mechanism (7), and seals it through the sealing gate (706); S501: while the auxiliary fixing mechanism 1 drags the rocket into the loading cylinder (701) on the rocket sealing and transporting mechanism (7), water is simultaneously injected into the counterweight box (3) to increase the weight, so as to maintain the balance stability of both sides of the offshore landing platform (5) when the rocket moves horizontally to one side; S6: pulling the locking pin out from the fixing block (704), and at the same time the auxiliary positioning mechanism (6) no longer supports and fixes the rocket sealing and transporting mechanism (7), thereby achieving separation of the rocket sealing and transporting mechanism (7) from the rotating platform (4); S7: Control the two buoyancy chambers (702) at the bottom of the rocket sealing and transporting mechanism (7) to unfold under the action of the telescopic rod five (713), and at the same time, the buoyancy tube (714) is extended under the action of the double-headed telescopic rod, and then the rocket sealing and transporting mechanism (7) can be dragged and transported through the hull.

Images