Three-stage progressive jettisoning device

Abstract

This invention belongs to the field of underwater equipment jettisoning devices, specifically a three-stage progressive jettisoning device. It includes a fixed base, a jettison weight, a main connecting plate, a first-stage jettisoning mechanism, and two symmetrically arranged hydraulic jettisoning components. The first-stage jettisoning mechanism is located on the main connecting plate. During normal operation, the first-stage jettisoning mechanism holds the jettison weight against it. When jettisoning is required, an external power source drives the first-stage jettisoning mechanism to release the weight. The first-stage jettisoning mechanism releases the weight by releasing the swing arm constraint via a motor-driven internal valve core. This invention, through its three-stage jettisoning mechanism—namely, a motor-driven internal valve core releasing the swing arm constraint to release the weight, a jettisoning bolt breaking to release the jettisoning unit, and a jettisoning bolt pushing the jettisoning unit—has a relatively simple structure, high reliability, and ensures that deep-sea UUVs can achieve emergency ascent by jettisoning when out of control.

Description

Technical Field

[0001] This invention belongs to the field of underwater equipment jettisoning devices, specifically a three-stage progressive jettisoning device. Background Technology

[0002] During missions, deep-sea UUVs are at risk of sinking or being lost if they malfunction or become uncontrollable due to external factors, resulting in significant losses. A ballast jettisoning device is needed to quickly jettison ballast and allow the UUV to surface in case of malfunction, greatly reducing the risk of loss. However, existing jettisoning devices are relatively complex in structure, have poor reliability, and are prone to failure, rendering them ineffective. Summary of the Invention

[0003] To address the aforementioned problems, the present invention aims to provide a three-stage progressive load-release device.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A three-stage progressive throwing device includes a fixed base, a throwing weight, a main connecting plate, a first-stage throwing mechanism, and several sets of hydraulic throwing components. The first-stage throwing mechanism is disposed on the main connecting plate. When the first-stage throwing mechanism is working normally, it presses against the throwing weight. When it is necessary to throw the throwing weight, an external power source drives the first-stage throwing mechanism to move and release the throwing weight.

[0006] Each hydraulic ejection assembly includes a connecting end, ejection bolts, and a piston rod. The ejection bolts are axially divided from top to bottom into a connecting end connection, a fixed base connection, an axial breakage section, and a connecting thread section. The upper end of the connecting end has a concave piston rod movement channel. The upper opening of the piston rod movement channel connects to the connecting end. The piston rod is axially divided from top to bottom into a piston head and a push rod section. The piston head mates with the inner wall of the piston rod movement channel, and the push rod section extends to... The interior of the connecting threaded portion and the end face of the push rod portion abut against the interior of the connecting threaded portion, the fixed base connecting portion is connected to the fixed base, the connecting threaded portion is located above the thrown heavy block, the connecting threaded portion passes through the fixed base and the main connecting plate in sequence and is connected to a fixing nut, the fixing nut and the connecting end connecting portion clamp the fixed base and the main connecting plate, and the outer diameter of the axial fracture portion is smaller than the outer diameter of the connecting end connecting portion, the outer diameter of the fixed base connecting portion and the outer diameter of the connecting threaded portion, respectively;

[0007] Hydraulic oil is input into the space above the piston head in the piston rod movement channel through the connecting end. The hydraulic oil presses the piston head downward, and the push rod part presses the connecting thread part downward under the action of the piston head. The ejector bolt part breaks at the axial fracture part under the action of the input hydraulic oil.

[0008] The outer circumferential surface of the fixed base connection part is provided with an external thread, and the fixed base is provided with a threaded hole that matches the external thread of the fixed base connection part.

[0009] An annular groove is formed on the outer peripheral surface of the piston head, and a sealing ring is installed inside the annular groove.

[0010] The connecting end is connected to the upper opening of the piston rod movement channel via a thread.

[0011] The first-stage throwing mechanism includes a main shell, a rotary valve, and a swing arm. The upper part of the main shell is disposed on the main connecting plate, and the lower part extends into the inner side of the throwing weight. The rotary valve includes an outer connecting seat and an inner valve core. The outer connecting seat is connected to the main shell, and the inner valve core is rotatably disposed inside the outer connecting seat. The lower part of the inner valve core has a protrusion. The swing arm is mounted inside the main shell via a connecting shaft. One end of the swing arm abuts against the throwing weight, and the other end abuts against the outer surface of the protrusion. The upper part of the inner valve core is driven by an external power source. The protrusion is separated from the other end of the swing arm, and one end of the swing arm rotates and releases the throwing weight.

[0012] The main outer shell and the main connecting plate are an integral structure.

[0013] The upper part of the main body shell passes through the fixed base.

[0014] The external connector is connected to the main body shell by a thread.

[0015] The lower part of the main body shell is provided with a U-shaped groove, and one end of the swing rod passes through the U-shaped groove to abut against the throwing weight.

[0016] An adjustment hole is provided in the middle of the main body shell, and the other end of the swing rod passes through the adjustment hole and abuts against the protrusion.

[0017] The advantages and positive effects of this invention are as follows:

[0018] This invention employs a three-stage jettisoning method: the motor drives the inner valve core to release the rocker arm restriction and thus release the jettison weight; the jettison bolt breaks to release the jettisoning unit; and the jettison bolt pushes the jettisoning unit. The structure is relatively simple and highly reliable, ensuring that the deep-sea UUV can achieve emergency ascent by jettisoning when out of control. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a top view of the fixed base of the present invention.

[0021] Figure 3 This is a schematic diagram of the external structure of the hydraulic load-release assembly of the present invention;

[0022] Figure 4 This is a schematic diagram of the internal structure of the hydraulic ejection assembly of the present invention;

[0023] Figure 5 This is a schematic diagram of the connection structure between the first-stage throwing mechanism and the throwing weight of the present invention;

[0024] Figure 6 This is a three-dimensional structural diagram of the main connecting plate and the main body shell of the present invention.

[0025] In the diagram: 1 is the fixed base, 101 is the threaded hole, 2 is the load-bearing block, 3 is the main connecting plate, 4 is the connecting end, 5 is the load-bearing bolt, 501 is the connecting end connection part, 502 is the fixed base connection part, 503 is the axial fracture part, 504 is the connecting thread part, 505 is the piston rod movement channel, 6 is the piston rod, 601 is the piston head, 602 is the push rod part, 7 is the fixing nut, 8 is the main body shell, 801 is the U-shaped groove, 802 is the adjustment hole, 9 is the swing arm, 10 is the outer connecting seat, 11 is the inner valve core, 1101 is the protrusion, and 12 is the connecting shaft. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-6 The present invention will be described in further detail below.

[0027] A three-stage progressive ejection device, such as Figure 1-6 As shown, this embodiment includes a fixed base 1, a throwing weight 2, a main connecting plate 3, a first-stage throwing mechanism, and two sets of symmetrically arranged hydraulic throwing components. The first-stage throwing mechanism is mounted on the main connecting plate 3. When the first-stage throwing mechanism is working normally, it presses against the throwing weight 2. When it is necessary to throw the throwing weight 2, an external power source drives the first-stage throwing mechanism to move and release the throwing weight 2. In this embodiment, the fixed base 1 is mounted on the structural frame of the UUV, and the mounting method adopts existing technology; the throwing weight 2 is a ring-shaped structure.

[0028] like Figure 3 and Figure 4As shown, in this embodiment, each hydraulic ejection assembly includes a connecting end 4, an ejection bolt 5, and a piston rod 6. The ejection bolt 5 is divided into a connecting end connecting part 501, a fixed base connecting part 502, an axial fracture part 503, and a connecting thread part 504 along the axial direction from top to bottom. The upper end of the connecting end connecting part 501 is recessed with a piston rod movement channel 505. The upper opening of the piston rod movement channel 505 is connected to the connecting end 4. The piston rod 6 is divided into a piston head 601 and a push rod part 602 along the axial direction from top to bottom. The piston head 601 cooperates with the inner wall of the piston rod movement channel 505, and the push rod part 602 extends to the connecting thread part 504. The interior of 04 and the end face of the push rod portion 602 abuts against the interior of the connecting thread portion 504. The fixed base connecting portion 502 is connected to the fixed base 1. The connecting thread portion 504 is located above the thrown weight block 2. The connecting thread portion 504 passes through the fixed base 1 and the main connecting plate 3 in sequence and is connected to the fixing nut 7. The fixing nut 7 and the connecting end connecting portion 501 clamp the fixed base 1 and the main connecting plate 3. The outer diameter of the axial fracture portion 503 is smaller than the outer diameter of the connecting end connecting portion 501, the outer diameter of the fixed base connecting portion 502, and the outer diameter of the connecting thread portion 504. In this embodiment, the outer diameter of the fixed base connecting portion 502 and the outer diameter of the connecting thread portion 504 are the same. In this embodiment, the piston rod movement channel 505 is a stepped channel. The push rod portion 602 extends into the smaller diameter part of the piston rod movement channel 505, and the outer diameter of the push rod portion 602 matches the inner diameter of the smaller diameter part of the piston rod movement channel 505.

[0029] Hydraulic oil is input into the space above the piston head 601 in the piston rod movement channel 505 through the connecting end 4. The hydraulic oil presses the piston head 601 downward, and the push rod 602, driven by the piston head 601, presses the connecting thread 501 downward. The ejection bolt 5 breaks at the axial fracture point 503 under the action of the input hydraulic oil, thereby realizing the overall ejection of the ejection unit (the ejection unit is an integral part consisting of the ejection weight 2, the main connecting plate 3, the first-stage ejection mechanism, and the broken ejection bolt 5) on the lower side of the fixed base 1. In this embodiment, the material of the axial fracture point 503 is solution-treated martensitic stainless steel; the connecting end 4 is connected to the hydraulic oil source on the structural frame of the UUV, and the connection method adopts existing technology.

[0030] Specifically, in this embodiment, the outer peripheral surface of the fixed base connecting part 502 is provided with external threads, and the fixed base 1 is provided with a threaded hole 101 that matches the external threads of the fixed base connecting part 502. The threaded connection method facilitates disassembly and assembly.

[0031] Specifically, in this embodiment, an annular groove is formed on the outer peripheral surface of the piston head 601, and a sealing ring is installed inside the annular groove. The sealing ring serves to seal and prevent hydraulic oil from entering the lower space of the piston head 601. In this embodiment, a commercially available rubber sealing ring is used.

[0032] Specifically, in this embodiment, the connecting end 4 is connected to the upper opening of the piston rod movement channel 505 by a thread, and the threaded connection method facilitates disassembly and assembly.

[0033] Specifically, such as Figure 5 and Figure 6 As shown, in this embodiment, the first-stage throwing mechanism includes a main shell 8, a rotary valve, and a swing rod 9. The upper part of the main shell 8 is disposed on the main connecting plate 3, and the lower part extends into the inner side of the throwing weight 2. The rotary valve includes an outer connecting seat 10 and an inner valve core 11. The outer connecting seat 10 is threadedly connected to the main shell 8. The inner valve core 11 is rotatably disposed inside the outer connecting seat 10. The lower part of the inner valve core 11 is provided with a protrusion 1101. The swing rod 9 is installed inside the main shell 8 through a connecting shaft 12. One end of the swing rod 9 abuts against the throwing weight 2, and the other end abuts against the outer surface of the protrusion 1101. The upper part of the inner valve core 11 is driven by an external power source. The protrusion 1101 separates from the other end of the swing rod 9, and one end of the swing rod 11 rotates and releases the throwing weight 2. In this embodiment, the external power source is the jetting motor assembly on the UUV structural frame. The jetting motor assembly is a prior art structure. The inner valve core 11 is connected to the output end of the jetting motor assembly through a coupling. When the jetting unit is completely detached, the inner valve core 11 separates from the coupling.

[0034] Specifically, in this embodiment, the main shell 8 and the main connecting plate 3 are an integral structure, and the upper part of the main shell 8 passes through the fixed base 1. The structure is simple and the positioning is reliable.

[0035] Specifically, in this embodiment, a U-shaped groove 801 is provided at the lower part of the main body shell 8, one end of the swing rod 9 passes through the U-shaped groove 801 and abuts against the load block 2, and an adjustment hole 802 is provided in the middle of the main body shell 8, and the other end of the swing rod 9 passes through the adjustment hole 802 and abuts against the protrusion 1101, so as to make full use of the space.

[0036] Working principle:

[0037] When the deep-sea UUV does not require an emergency ascent, the protrusion 1101 of the inner valve core 11 is tangent to the swing arm 9, and the swing arm 9 cannot move. When the deep-sea UUV needs to ascend urgently, the emergency ascent is achieved by jettisoning the ballast in the following three ways:

[0038] 1) The motor drives the internal valve core to release the rocker arm restriction, thereby releasing the thrown weight.

[0039] This is the normal release method for the thrown weight 2. After the inner valve core 11 is driven to rotate by the throwing motor assembly, the swing arm 9 rotates around the connecting shaft 12, thereby realizing the release of the thrown weight 2.

[0040] 2) Load release unit with broken bolt components

[0041] If the jettison motor assembly malfunctions and the swing arm 9 fails to release, causing the jettison weight 2 to fail to sink, the UUV system detects that the UUV has failed to release the jettison weight 2 (i.e., the UUV has failed to rise quickly). Then, the second-stage jettisoning action is initiated. High-pressure oil is injected into the jettison bolt 5 to push the piston rod 6 to move. When the strength limit of the fracture surface of the axial fracture section 503 is exceeded, the jettison bolt 5 breaks from the axial fracture section 503 at the unthreaded part in the middle, thereby realizing the overall jettisoning of the jettisoning unit.

[0042] 3) The ejection bolt component pushes the ejection unit.

[0043] If the UUV system detects that the release of the jettison block has not been successfully achieved in the first two situations (i.e., the UUV has not achieved rapid ascent), then this third solution will be adopted in time. High-pressure oil will continue to be injected into the jettison bolt 5 to achieve the continued descent of the jettison bolt 5 after it breaks. The bottom of the connecting thread 504 will contact the jettison block 2, and high-pressure oil will continue to be injected to push the jettison block 2 until the jettison block 2 is released.

Claims

1. A three-stage progressive load-release device, characterized in that: It includes a fixed base (1), a throwing weight (2), a main connecting plate (3), a first-stage throwing mechanism and several sets of hydraulic throwing components. The first-stage throwing mechanism is set on the main connecting plate (3). When the first-stage throwing mechanism is working normally, it presses against the throwing weight (2). When it is necessary to throw the throwing weight (2), an external power source drives the first-stage throwing mechanism to move and release the throwing weight (2). Each hydraulic ejection assembly includes a connecting end (4), an ejection bolt (5), and a piston rod (6). The ejection bolt (5) is divided into a connecting end connecting part (501), a fixed base connecting part (502), an axial fracture part (503), and a connecting thread part (504) along the axial direction from top to bottom. The upper end of the connecting end connecting part (501) is recessed with a piston rod movement channel (505). The upper opening of the piston rod movement channel (505) is connected to the connecting end (4). The piston rod (6) is divided into a piston head (601) and a push rod part (602) along the axial direction from top to bottom. The piston head (601) cooperates with the inner wall of the piston rod movement channel (505). The push rod part (602) extends to... The inside of the connecting threaded part (504) and the end face of the push rod part (602) abut against the inside of the connecting threaded part (504), the fixed base connecting part (502) is connected to the fixed base (1), the connecting threaded part (504) is located above the thrown heavy block (2), the connecting threaded part (504) passes through the fixed base (1) and the main connecting plate (3) in sequence and is connected to a fixing nut (7), the fixing nut (7) and the connecting end connecting part (501) clamp the fixed base (1) and the main connecting plate (3), the outer diameter of the axial fracture part (503) is smaller than the outer diameter of the connecting end connecting part (501), the outer diameter of the fixed base connecting part (502) and the outer diameter of the connecting threaded part (504); Hydraulic oil is input into the space above the piston head (601) in the piston rod movement channel (505) through the connecting end (4). The hydraulic oil presses the piston head (601) downward. The push rod (602) presses the connecting thread (504) downward under the action of the piston head (601). The ejector bolt (5) breaks at the axial fracture part (503) under the action of the input hydraulic oil.

2. The three-stage progressive load-release device according to claim 1, characterized in that: The outer circumferential surface of the fixed base connecting part (502) is provided with an external thread, and the fixed base (1) is provided with a threaded hole (101) that matches the external thread of the fixed base connecting part (502).

3. The three-stage progressive load-dropping device according to claim 1, characterized in that: An annular groove is provided on the outer peripheral surface of the piston head (601), and a sealing ring is installed inside the annular groove.

4. The three-stage progressive load-release device according to claim 1, characterized in that: The connecting end (4) is connected to the upper opening of the piston rod movement channel (505) by means of a thread.

5. The three-stage progressive load-release device according to claim 1, characterized in that: The first-stage throwing mechanism includes a main shell (8), a rotary valve, and a swing arm (9). The upper part of the main shell (8) is disposed on the main connecting plate (3), and the lower part extends into the inner side of the throwing weight (2). The rotary valve includes an outer connecting seat (10) and an inner valve core (11). The outer connecting seat (10) is connected to the main shell (8), and the inner valve core (11) is rotatably disposed inside the outer connecting seat (10). The lower part of the inner valve core (11) The protrusion (1101) is provided, and the swing rod (9) is installed inside the main body shell (8) through the connecting shaft (12). One end of the swing rod (9) abuts against the throwing weight (2), and the other end abuts against the outer surface of the protrusion (1101). The upper part of the inner valve core (11) is driven by an external power source. The protrusion (1101) is separated from the other end of the swing rod (9), and one end of the swing rod (9) rotates and releases the throwing weight (2).

6. The three-stage progressive load-release device according to claim 5, characterized in that: The main shell (8) and the main connecting plate (3) are an integral structure.

7. The three-stage progressive load-dropping device according to claim 6, characterized in that: The upper part of the main body shell (8) passes through the fixed base (1).

8. The three-stage progressive load-dropping device according to claim 5, characterized in that: The outer connector (10) is connected to the main body shell (8) by a thread.

9. The three-stage progressive load-dropping device according to claim 5, characterized in that: The lower part of the main body shell (8) is provided with a U-shaped groove (801), and one end of the swing rod (9) passes through the U-shaped groove (801) and abuts against the throwing weight (2).

10. The three-stage progressive load-dropping device according to claim 5, characterized in that: An adjustment hole (802) is provided in the middle of the main body shell (8), and the other end of the swing rod (9) passes through the adjustment hole (802) and abuts against the protrusion (1101).

Images