CN113945126B

CN113945126B - Underwater multi-body cutting and separating device

Info

Publication number: CN113945126B
Application number: CN202111125353.0A
Authority: CN
Inventors: 明付仁; 王嘉捷; 张阿漫; 张晓龙; 刘文韬
Original assignee: Harbin Engineering University
Current assignee: Harbin Engineering University
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-07-08
Anticipated expiration: 2041-09-23
Also published as: CN113945126A

Abstract

The invention provides an underwater multi-body cutting and separating device, wherein a porous impact isolation ring of the separating device is welded below an upper structure, an impedance mismatch layer is welded below the porous impact isolation ring, the upper structure and the lower structure are welded by adopting steel plates, and cutting surfaces, expansion pipes and detonation medicine cores are sequentially arranged in the areas surrounded by the steel plates, the upper structure and the lower structure from outside to inside; the explosive of the explosive core generates huge energy to rapidly increase the volume of the expanding agent in the expansion pipe, the energy is transferred to a cutting surface, the cutting surface generates huge pressure on the steel plate, the steel plate is cut off, and the solid and multi-body structure is effectively separated. The device solves the technical problems of back empty boundary setting and large-scale structure movement, the structure of the device and the installation between the device and a test model are simple, the model can be processed on the shore in advance, a porous shock isolation ring and an impedance mismatch layer are welded, a flux core is arranged to be filled with a refractory material expanding agent, and then the whole device is placed under water to separate underwater explosion multi-body structures.

Description

Underwater multi-body cutting and separating device

Technical Field

The invention relates to an underwater multi-body cutting and separating device, and belongs to the technical field of explosion application.

Background

Unmanned Underwater Vehicles (UUVs) have come to the rapid development stage, and UUVs are diversified in order to undertake various tasks, such as a primary and secondary separated underwater vehicle consisting of a plurality of UUVs. To achieve separation of the submersible vehicle, explosive separation methods may be used, but care should be taken to protect the submersible vehicle when using this method. In addition, the underwater weapon multi-body structure can also be separated by adopting the method, for example, a cross-medium weapon needs wings to balance stability during air flight, the existence of the wings in water can greatly increase resistance and reduce speed, and in order to improve the problem, the wings can be separated by adopting an explosion separation method.

Disclosure of Invention

The invention provides an underwater multi-body cutting and separating device which comprises a porous shock isolation ring, an impedance mismatching layer, a steel plate, a cutting surface, an expansion pipe and a detonation flux core,

the porous impact isolation ring is welded below the upper structure, the impedance mismatch layer is welded below the porous impact isolation ring, and the lower structure is similarly connected with the porous impact isolation ring and the impedance mismatch layer in sequence; the upper structure and the lower structure are welded by adopting steel plates, the steel plates are welded at the front, the back, the left and the right when the upper structure and the lower structure are connected, the whole device is a closed device, and cutting surfaces, expansion pipes and detonation medicine cores are sequentially arranged in the areas surrounded by the steel plates, the upper structure and the lower structure from outside to inside; the explosive of the detonation explosive core generates huge energy to rapidly increase the volume of the expanding agent in the expansion pipe, the energy is transferred to a cutting surface, the cutting surface generates huge pressure on the steel plate, the steel plate is cut off, and the effective separation of the upper structure and the lower structure is realized.

Preferably, the middle part of the porous impact isolation ring is provided with a plurality of oval openings, and the periphery of the porous impact isolation ring is provided with a semicircular unloading groove.

Preferably, the middle part of the porous impact isolating ring is provided with 3 oval openings which are distributed in a triangular shape.

Preferably, the major axis of the elliptical opening is disposed in the longitudinal direction.

Preferably, the impedance mismatch layer comprises three layers of materials, the upper layer and the lower layer are both barrier layers, and the middle layer is an energy absorption layer.

Preferably, the barrier layer is made of fiber resin reinforced composite material.

Preferably, the energy absorption layer is made of porous materials.

Preferably, the interior of the expansion pipe is filled with a refractory expanding agent.

Preferably, the cutting surface is provided with triangular prism-shaped protrusions at left and right sides.

Preferably, the steel plate is provided with a circular groove on the inner side, and the triangular prism-shaped protrusion with the cutting surface is positioned in the circular groove of the steel plate.

The underwater multi-body cutting and separating device has the beneficial effects that:

1. when the explosive unlocking is carried out, the structure is easy to be seriously damaged, and an impedance mismatch layer and a porous shock isolation ring are sequentially arranged between the structure and the medicine core to protect the structure. The impedance mismatch layer can effectively weaken and absorb shock waves generated by explosion and block fragments generated by explosion. The perforated shock isolating ring will further attenuate the shock wave and avoid damage to the structure from high stress areas.

2. The invention effectively avoids the harm caused by stress concentration by arranging the oval hole with the long shaft along the stress direction and the semicircular unloading grooves at the left side and the right side.

3. The device has the advantages that the structure of the device and the installation between the device and a test model are simple, the model can be processed on the shore in advance, the porous shock isolation ring and the impedance mismatch layer are welded, the flux core is filled with the refractory material expanding agent, and then the whole device is placed under water to separate the underwater explosion multi-body structure.

Drawings

In the drawings:

FIG. 1 is a schematic structural section view of an underwater multi-body cutting and separating device according to the present invention;

FIG. 2 is an enlarged partial cross-sectional isometric view of the present invention;

FIG. 3 is a schematic view of a cut surface;

the device comprises a base, a bottom, an upper structure, a lower structure, an expansion pipe, an explosion medicine core, an impedance mismatch layer, a steel plate.

Detailed Description

The present embodiment is explained with reference to fig. 1 to 3. The underwater multi-body cutting and separating device comprises a porous shock isolation ring 2, an impedance mismatching layer 3, a steel plate 4, a cutting surface 6, an expansion pipe 7 and a detonation flux core 8,

the porous shock isolating ring 2 is welded below the upper structure 1, the impedance mismatch layer 3 is welded below the porous shock isolating ring 2, and the lower structure 5 is connected with the porous shock isolating ring and the impedance mismatch layer in sequence in the same way; the upper structure 1 and the lower structure 5 are welded by adopting steel plates 4, and the cutting surfaces 6, the expansion pipes 7 and the medicine cores 8 are sequentially arranged in the areas surrounded by the steel plates 4 and the upper structure 1 and the lower structure 5 from outside to inside.

The primary-secondary structure is composed of an upper structure 1 and a lower structure 5, explosion is used for separating multi-body structures such as the primary-secondary structure, and the multi-body structures are simplified by the upper structure 1 and the lower structure 5.

The middle part of the porous impact isolation ring 2 is provided with a plurality of oval openings 9, and the periphery is provided with a semicircular unloading groove 10.

The middle part of the porous impact isolation ring 2 is provided with 3 oval openings 9 which are distributed in a triangular shape. The major axis of the oval opening 9 is arranged in the longitudinal direction.

The invention takes the case that the square structure 1 is connected with a corresponding protective structure. As shown in figure 1, a porous shock isolating ring 2 is welded on an upper structure 1, then an impedance mismatch layer 3 is welded on the upper structure, an elliptical opening 9 is formed in the middle of the porous shock isolating ring 2, the long axis of an ellipse is parallel to the stress direction, and semicircular unloading grooves 10 are formed in two sides of the ellipse. The elliptical openings 9 are arranged in a triangular shape, the structural boundary is streamline, the stress concentration coefficient can be reduced to the maximum extent, and the semicircular unloading grooves 10 can also effectively reduce the stress concentration.

The porous isolation impact ring 2 below welding impedance mismatch layer 3, the impedance mismatch layer 3 is hollow structure, and three layers of materials are laid inside: the upper layer and the lower layer are barrier layers 11, and the fiber resin reinforced composite material with better energy absorption effect and higher strength is adopted, so that the structure can be effectively prevented from being damaged by fragments and shock waves generated by explosion; the middle layer is an energy absorption layer 12, a porous material is selected for the energy absorption layer, and the shock wave energy is effectively absorbed through the deformation of the porous material.

The left side and the right side of the cutting surface 6 are provided with triangular prism-shaped bulges. A circular groove is formed in the inner side of the steel plate 4, and the triangular prism-shaped protrusions with cutting surfaces 6 are located in the circular groove of the steel plate 4.

The connection of upper structure 1 and lower structure 5 is realized through welding steel sheet 4, and steel sheet 4 inboard is opened there is semicircle type recess, and the corresponding position is the triangular prism of cutting plane 6 and is protruding. The semicircular groove is formed in the inner side of the steel plate 4 to reduce stress concentration and prevent the concave part from being broken during normal operation; the cutting surface 6 adopts the triangular prism protrusion to fully utilize stress concentration, increase the pressure intensity when the cutting surface acts on, and can quickly and effectively cut off the steel plate 4, thereby realizing effective separation of underwater multi-body structures. An expansion pipe 7 and a flux core 8 are respectively arranged in the cutting surface 6, and a refractory material expanding agent is filled in the expansion pipe 7.

In order to realize the separation of underwater multi-body structures, the explosive core 8 is detonated, huge energy is generated by explosion, so that the volume of the expanding agent in the expansion pipe 7 is rapidly increased, the energy is transferred to the cutting surface 6, the triangular prism protrusions generate huge pressure on the steel plate 4, the steel plate 4 is cut off, and the effective separation of the upper structure 1 and the lower structure 5 is realized. Meanwhile, through the arrangement of the impedance mismatch layer 3 and the porous shock isolation ring 2, the influence of shock waves and fragments on the structure is reduced, and the original function of the structure is guaranteed not to be damaged.

The above-mentioned embodiments further illustrate the objects, technical solutions and advantages of the present invention in detail. It should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the present invention, and that the reasonable combination of the features described in the above-mentioned embodiments can be made, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An underwater multi-body cutting and separating device is characterized by comprising a porous shock isolation ring (2), an impedance mismatch layer (3), a steel plate (4), a cutting surface (6), an expansion pipe (7) and a detonation cartridge core (8),

the porous shock isolation ring (2) is welded below the upper structure (1), the impedance mismatch layer (3) is welded below the porous shock isolation ring (2), the upper structure (1) and the lower structure (5) are welded by adopting steel plates (4), and cutting surfaces (6), expansion pipes (7) and detonation medicine cores (8) are sequentially arranged in the areas surrounded by the steel plates (4) and the upper structure (1) and the lower structure (5) from outside to inside; the detonation explosive core (8) explodes to generate huge energy, so that the volume of the expanding agent in the expansion pipe (7) is rapidly increased, the energy is transferred to the cutting surface (6), the cutting surface (6) generates huge pressure on the steel plate (4), the steel plate (4) is cut off, and the upper structure (1) and the lower structure (5) are effectively separated;

the middle part of the porous impact isolation ring (2) is provided with a plurality of oval openings (9), and the periphery of the porous impact isolation ring is provided with a semicircular unloading groove (10);

the impedance mismatch layer (3) comprises three layers of materials, the upper layer and the lower layer are both barrier layers (11), and the middle layer is an energy absorption layer (12).

2. Underwater multi-body cutting and separating device according to claim 1, wherein the middle part of the porous impact isolating ring (2) is provided with 3 oval openings (9) which are distributed in a triangular shape.

3. An underwater multi-body cutting and separating device as claimed in claim 1, wherein the major axis of the oval opening (9) is arranged in the longitudinal direction.

4. An underwater multi-body cutting and separating device as claimed in claim 1, wherein the barrier layer (11) is made of a fiber resin reinforced composite material.

5. Underwater multi-body cutting and separating device according to claim 1, wherein the energy absorbing layer (12) is made of a porous material.

6. An underwater multi-body cutting and separating device according to claim 1, characterized in that the expansion pipe (7) is internally filled with a refractory material expanding agent.

7. Underwater multi-body cutting and separating device according to claim 1, wherein the cutting surface (6) is provided with triangular prism-shaped protrusions at both left and right sides.

8. Underwater multi-body cutting and separating device according to claim 7, wherein the steel plate (4) is provided with circular grooves on the inside, and the triangular prism-shaped protrusions of the cutting surfaces (6) are located in the circular grooves of the steel plate (4).