A linear separation device suitable for underwater separation

Abstract

The application discloses a line type separation device suitable for underwater use, which comprises a flexible detonating cord, a separation ring shell, a sealing shell, a protective cover, an initiator seat, an initiating joint, an adapter pipe and an initiator. The initiator is used for transmitting the explosion of the flexible detonating cord, the flexible detonating cord is installed in a flexible detonating cord installation slot on the protective cover, the protective cover is inserted into the separation ring shell, the sealing shell is sleeved outside the protective cover and the separation ring shell, a sealing ring installation slot is arranged on the end face of one end of the sealing shell, and a sealing ring is installed between the end face of the sealing shell and an annular retaining ring arranged on the outer wall of the separation ring shell. The initiator is installed on the adapter pipe, the adapter pipe is installed on the initiating joint, and the initiating joint is installed on the inner wall of the protective cover through the initiator seat. The application has the advantages of reducing the underwater separation pressure and providing a good separation environment for aircraft equipment.

Description

Technical Field

[0001] This invention belongs to the field of aircraft structure technology and relates to an underwater linear separation device. Background Technology

[0002] The primary function of linear separation devices in aircraft is to rapidly sever the connection between the supporting hulls upon receiving a separation sequence command. Pyrotechnic linear separation devices such as flexible detonating cords, shaped charge cutting cords, and expansion tube-grooved plates offer advantages such as avoiding concentrated connection loads, light weight, and reliable separation. However, the increasing demand for underwater separation in recent years has highlighted the significant challenges of the underwater pressure environment, which hinders the realization of linear separation functions. Water pressure acting on the separation hull inhibits deformation after the detonating cord is activated, leading to reduced separation margins or even separation failure. Summary of the Invention

[0003] The technical problem to be solved by this invention is: addressing the drawback that underwater separation pressure acting on the separation shell inhibits the deformation of the separation shell after the detonating cord is activated, this invention discloses a linear separation device adapted for underwater separation, which has the advantage of reducing underwater separation pressure and can provide a good separation environment for aircraft equipment.

[0004] The technical solution adopted in this invention is: a linear separation device suitable for underwater use, comprising: a flexible detonating cord, a separation ring shell, a sealing shell, a protective cover, a detonator seat, a detonating connector, a transfer pipe, and a detonator;

[0005] The detonator is used to transmit the detonation of the flexible detonating cord, which is installed in the flexible detonating cord mounting groove on the protective cover. The protective cover is inserted into the separation ring housing, and the sealing housing is fitted over the outer side of the protective cover and the separation ring housing. A sealing ring mounting groove is provided on one end face of the sealing housing, and a sealing ring is installed between the end face of the sealing housing and the annular retaining ring provided on the outer wall of the separation ring housing. The detonator is installed on the transfer pipe, which is installed on the detonation connector. The detonation connector is installed on the inner wall of the protective cover through the detonator seat.

[0006] Furthermore, the linear separation device is equipped with two detonators for functional redundancy.

[0007] Furthermore, the separation ring housing is cylindrical, with several mounting holes arranged circumferentially at one end for mounting screws connected to the protective cover, and an annular retaining ring on the outer wall and an annular protrusion structure on the inner wall for limiting the position of the protective cover at the other end.

[0008] Furthermore, the sealing housing includes two annular structures with different diameters, which are connected at the joint by a stepped structure, and the small end of the sealing housing is provided with several connecting holes along the circumference.

[0009] Furthermore, the separation ring housing, sealing housing, and protective cover are all made of 2A14 aluminum alloy.

[0010] Furthermore, the detonator base and the protective cover are connected by high-temperature alloy bolts.

[0011] Furthermore, the materials of the detonator base, detonation connector, and transfer pipe are all 0Cr13Ni8Mo2Al.

[0012] Furthermore, several annular grooves are provided on the side wall of the separation ring housing, and after installation, the position of the annular grooves corresponds to the position of the flexible detonating cord.

[0013] Furthermore, the linear separation device detonates the flexible detonating cord via an initiator, which breaks the separation ring housing at the annular groove position, thus completing the separation.

[0014] The advantages of this invention compared to the prior art are:

[0015] (1) The present invention addresses the drawback that underwater separation water pressure acting on the separation shell will inhibit the deformation of the separation shell after the detonating cord is activated, without changing the structure of the ignition device itself, and therefore does not affect the separation reliability;

[0016] (2) The present invention has the advantages of reducing underwater separation pressure, is easy to install, can adapt to underwater pressure environment, and can provide a good separation environment for linear separation structure. Attached Figure Description

[0017] Figure 1 This is an external view of the underwater separation device.

[0018] Figure 2 This is a diagram of the outer shape of the separation ring housing.

[0019] Figure 3 This is a diagram of the outer shape of the sealed housing.

[0020] Figure 4 This is a diagram of the protective cover's outline.

[0021] Figure 5 This is a diagram of the detonator base.

[0022] Figure 6 This is a diagram of the detonation connector.

[0023] Figure 7 This is a diagram of the external shape of the transfer pipe.

[0024] Figure 8 This is a diagram of the detonator's external shape. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 As shown, the present invention discloses a linear separation device suitable for underwater use, comprising: a flexible detonating cord 1, a separation ring housing 2, a sealing housing 3, a protective cover 4, a detonator seat 5, a detonating connector 12, a transfer pipe 13, and a detonator 8.

[0027] This separation device has two redundant detonators 8 for transmitting the flexible detonating cord. The flexible detonating cord 1 is a pyrotechnic component for cutting the separation ring shell, and its length and curvature can be adjusted as needed. The flexible detonating cord 1 is installed in the pyrotechnic component mounting groove 9 of the protective cover. After installation, the protective cover 4 is inserted into the separation ring shell 2, and screws are used to connect the protective cover 4 to the separation ring shell 2. The sealing shell 3 has a sealing ring mounting groove 10 for sealing the underwater separation ring shell. After the sealing ring 9 is installed on the sealing shell 3, the sealing shell 3 is fitted over the protective cover 4 and the outer side of the separation ring shell 2. The end face of the sealing shell 3 aligns with the annular retaining ring on the outer wall of the separation ring shell 2. The sealing shell 3 and the protective cover 4 are connected with screws. The detonator seat 5 is installed, the detonation connector 12 and the adapter pipe 13 are connected, and finally the detonator 8 is installed.

[0028] like Figure 2 As shown, the separation ring housing 2 is cylindrical, with several mounting holes arranged circumferentially at one end for mounting screws connected to the protective cover 4, and an annular retaining ring on the outer wall and an annular protrusion structure on the inner wall for limiting the position of the protective cover 4.

[0029] like Figure 3 As shown, the sealing housing 3 includes two annular structures with different diameters. The two annular structures with different diameters are connected by a stepped structure at the connection point. Several connecting holes 7 are provided circumferentially at the small end of the sealing housing 3.

[0030] The underwater linear cutting and separating device of the present invention, including the separation ring shell 2, the sealing shell 3, and the protective cover 4, are all made of high-strength forgings of 2A14 aluminum alloy.

[0031] like Figure 4 As shown, the flexible detonating cord 1 is installed in the mounting slot of the protective cover 4.

[0032] like Figures 5-8 As shown, two detonators 8 are respectively installed on two transfer pipes 13.

[0033] Two adapter pipes 13 are respectively installed on two detonation connectors 12.

[0034] The detonator base 5 and the protective cover 4 are connected by four M12mm high-temperature alloy bolts.

[0035] The materials of the detonator base 5, detonator connector 12 and transfer pipe 13 are all 0Cr13Ni8Mo2Al.

[0036] The separation surface thickness of the separation ring shell 2 is 3mm, and the linear density of the flexible detonating cord 1 is 3g / m.

[0037] The linear separation device detonates the flexible detonating cord 1 via the detonator 8. The flexible detonating cord 1 breaks the separation ring housing 2 at the annular groove position, completing the separation. After operation, the cut surface of the separation surface is neat, and the upper and lower stages separate smoothly, with a separation time of less than 5ms.

[0038] The parts of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A linear separation device suitable for underwater applications, characterized in that, include: Flexible detonating cord (1), separation ring housing (2), sealing housing (3), protective cover (4), detonator seat (5), detonation connector (12), transfer pipe (13) and detonator (8); The detonator (8) is used to transmit the detonating flexible detonating cord (1). The flexible detonating cord (1) is installed in the flexible detonating cord mounting groove (11) on the protective cover (4). The protective cover (4) is inserted into the separation ring housing (2). The sealing housing (3) is sleeved on the outside of the protective cover (4) and the separation ring housing (2). A sealing ring mounting groove (10) is provided on one end face of the sealing housing (3). A sealing ring (9) is installed between the end face of the sealing housing (3) and the annular retaining ring provided on the outer wall of the separation ring housing (2). The detonator (8) is installed on the transfer pipe (13). The transfer pipe (13) is installed on the detonation connector (12). The detonation connector (12) is installed on the inner wall of the protective cover (4) through the detonator seat (5).

2. The linear separation device suitable for underwater applications according to claim 1, characterized in that, The linear separation device is equipped with two detonators (8) for functional redundancy.

3. A linear separation device suitable for underwater applications according to claim 1, characterized in that, The separation ring housing (2) is cylindrical, with several mounting holes arranged circumferentially at one end for mounting screws connected to the protective cover (4), and an annular retaining ring on the outer wall and an annular protrusion structure on the inner wall for limiting the protective cover (4).

4. A linear separation device suitable for underwater applications according to claim 1, characterized in that, The sealing housing (3) includes two annular structures with different diameters. The two annular structures with different diameters are connected by a stepped structure at the connection point. Several connecting holes (7) are provided at the small end of the sealing housing (3) along the circumferential direction.

5. A linear separation device suitable for underwater applications according to claim 1, characterized in that, The separation ring housing (2), sealing housing (3), and protective cover (4) are all made of 2A14 aluminum alloy.

6. A linear separation device suitable for underwater applications according to claim 1, characterized in that, The detonator base (5) and the protective cover (4) are respectively connected by high-temperature alloy bolts.

7. A linear separation device suitable for underwater applications according to claim 1, characterized in that, The material of the detonator base (5) is 0Cr13Ni8Mo2Al.

8. A linear separation device suitable for underwater applications according to claim 1, characterized in that, The materials of the detonation connector (12) and the transfer pipe (13) are both 0Cr13Ni8Mo2Al.

9. A linear separation device suitable for underwater applications according to claim 1, characterized in that, The separation ring housing (2) has several annular grooves on its side wall. After installation, the position of the annular grooves corresponds to the position of the flexible detonating cord (1).

10. A linear separation device suitable for underwater applications according to claim 9, characterized in that, The linear separation device detonates the flexible detonating cord (1) through the detonator (8), and the flexible detonating cord (1) breaks the separation ring shell (2) from the annular groove position, thus completing the separation.

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