Pneumatic separation and unlocking device for non-pyrotechnic separation nut of carrier rocket

Abstract

The invention provides a non-pyrotechnic separation nut pneumatic separation unlocking device of a carrier rocket, which is characterized in that a shell is connected with a separation body, and a positioning hole is formed in the bottom surface of the shell in a penetrating manner; the separation nut is arranged in an inner cavity of the shell, internal threads are arranged on the inner wall of the separation nut, and a second limiting convex ring and a second containing cavity are formed in the outer wall of the separation nut; the laminated spring is arranged on the inner bottom face of the shell, the bottom face of the inner shell abuts against the laminated spring, and a first limiting protruding ring and a first containing cavity are formed in an inner cavity of the inner shell. The end cover is located above the inner shell, an elastic pressing piece is arranged on the bottom face of the end cover, the inflation end cover is detachably connected with the upper portion of the shell, an inflation opening is formed in the surface of the inflation end cover, the end of the locking bolt extends into an inner cavity of the separation nut, and external threads of the locking bolt are matched with internal threads of the locking bolt. According to the scheme, a pneumatic driving mode is matched with the pressing cover and the elastic pressing piece to achieve separation of the separation nut, the locking bolt is removed, separation of the separation body and the body is achieved, damage to parts is avoided, and repeated utilization can be achieved.

Description

Technical Field

[0001] This invention relates to the field of launch vehicle technology, and in particular to a non-pyrotechnic separation and unlocking device for a launch vehicle's separation nut. Background Technology

[0002] Separation and unlocking devices are key mechanisms in rockets, missiles, and spacecraft, responsible for connecting, unlocking, and separating components. They are an essential part of the spacecraft structure. Through programmed control, they jettison discarded components (such as boosters and fairings) to achieve safe separation, ensuring the separated parts reach a predetermined velocity without the risk of collision.

[0003] However, current pyrotechnic separation and unlocking devices generate a large impact force during separation, which can easily damage the separating components and the main body. Furthermore, the separation and unlocking device is damaged during separation and cannot be reused. Summary of the Invention

[0004] This invention provides a non-pyrotechnic separation and unlocking device for a launch vehicle's separation nut. The device uses a pneumatic drive in conjunction with a pressure cap and an elastic pressure component to separate the separation nut, thereby releasing the locking bolt and separating the separation body from the main body. This process does not damage the components and allows for reuse.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: A non-pyrotechnic separation and unlocking device for a launch vehicle's separation nut includes: The housing is connected to the separator, and a positioning hole is provided through the bottom surface of the housing, which corresponds to the through hole of the separator and the main body; A separation nut is disposed in the inner cavity of the housing. The separation nut is a hollow column structure formed by radially connecting multiple arc-shaped parts. The inner wall of the separation nut is provided with internal threads. The outer wall of the separation nut is formed with multiple second limiting protrusions and multiple second receiving cavities. The multiple second limiting protrusions and multiple second receiving cavities are alternately distributed along the axial direction of the separation nut. A stacked spring is disposed on the inner bottom surface of the housing, and the release nut passes through the stacked spring; The inner shell has a tubular structure and is disposed within the outer shell. The separating nut is located in the inner cavity of the inner shell. The bottom surface of the inner shell abuts against the stacked spring. The inner cavity of the inner shell is formed with multiple first limiting protrusions and multiple first receiving cavities. The multiple first limiting protrusions and multiple first receiving cavities are alternately distributed along the axial direction of the inner shell. The multiple first limiting protrusions are adapted to multiple second receiving cavities, and the multiple second limiting protrusions are adapted to multiple first receiving cavities. A pressure cover is located above the inner shell. An elastic pressure member is provided on the bottom surface of the pressure cover, and the pressure part of the elastic pressure member abuts against the upper end of the release nut. An inflatable end cap is detachably connected to the upper part of the housing. An inflation port is provided on the surface of the inflatable end cap, and the inflation port is connected to an air supply device through an air pipe. The locking bolt has its end passing through the through hole of the main body and the separating body, and the positioning hole in sequence. The end of the locking bolt extends into the inner cavity of the separating nut. The external thread of the locking bolt is adapted to the internal thread. When multiple first limiting protrusions correspond to multiple second limiting protrusions, the internal thread of the separating nut engages and locks with the external thread of the locking bolt.

[0006] Optionally, the bottom surface of the inflatable end cap is formed with a connecting ring, which is threadedly connected to the upper part of the inner cavity of the housing.

[0007] Optionally, the elastic pressure-applying element includes: A pressure block, the bottom surface of which abuts against the upper end of the release nut; A spring, the two ends of which abut against the pressure cover and the pressure block, respectively.

[0008] Optionally, the bottom surface of the pressure cover is formed with a fixing post, which is inserted into the upper end of the spring; The surface of the pressure block is formed with a groove, and the bottom end of the spring is inserted into the groove.

[0009] Optionally, the bottom surface of the pressure block is formed with a fourth guide cone surface; The upper end of the separating nut is formed with a third guide cone surface, which is adapted to the fourth guide cone surface to drive the separating nut to separate radially.

[0010] Optionally, multiple arc-shaped blocks are formed on the third guide cone surface. When the internal thread of the separating nut engages and locks with the external thread of the locking bolt, the multiple arc-shaped blocks abut against the outer wall of the pressure block.

[0011] Optionally, the non-pyrotechnic separation nut pneumatic release and unlocking device of the launch vehicle further includes: A first guide cone surface is formed on the inner bottom surface of the housing. The first guide cone surface is coaxially arranged with the positioning hole and is located inside the cavity of the stacked spring. A second guide cone surface is formed at the bottom end of the release nut, and the second guide cone surface is adapted to the first guide cone surface to drive the release nut to separate radially.

[0012] Optionally, the non-pyrotechnic separation nut pneumatic release and unlocking device of the launch vehicle further includes: A positioning ring is formed on the bottom surface of the pressure cover. The positioning ring is inserted into the upper end of the inner cavity of the inner shell and abuts against the inner wall of the inner shell.

[0013] Optionally, the non-pyrotechnic separation nut pneumatic release and unlocking device of the launch vehicle further includes: A first transmission cone surface formed on the surface of multiple first limiting protrusions; A second drive cone surface formed on the bottom surface of a plurality of second limiting protrusions, the second drive cone surface being adapted to the first drive cone surface, to drive the release nut radially away from the inner wall of the inner shell.

[0014] Optionally, the non-pyrotechnic separation nut pneumatic release and unlocking device of the launch vehicle further includes: Multiple sealing rings are embedded in an annular groove on the outer side of the inner shell, and the multiple sealing rings are in close contact with the inner wall of the shell.

[0015] The above-described solution of the present invention has at least the following beneficial effects: The above-described solution of the present invention uses a pneumatic drive in conjunction with a pressure cover and an elastic pressure member to separate the separating nut, thereby releasing the locking bolt and separating the separating body from the main body. This does not cause damage to the components and allows for reuse. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the locked state of the pneumatic separation and unlocking device for the non-pyrotechnic separation nut of a launch vehicle provided in an embodiment of the present invention; Figure 2 yes Figure 1 Enlarged schematic diagram of part A; Figure 3 This is a schematic diagram of the unlocking state of the pneumatic separation and unlocking device for the non-pyrotechnic separation nut of a launch vehicle provided in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Shell; 11. First guide cone surface; 12. Positioning hole; 2. Inflation end cap; 21. Inflation port; 22. Connecting ring; 3. Inner shell; 31. First limiting protrusion ring; 32. First receiving cavity; 33. Sealing ring; 34. First transmission cone surface; 4. Pressure cover; 41. Fixing post; 42. Positioning ring; 51. Spring; 52. Pressure block; 53. Groove; 54. Fourth guide cone surface; 6. Separation nut; 61. Second limiting protrusion ring; 62. Second receiving cavity; 63. Second guide cone surface; 64. Third guide cone surface; 65. Arc-shaped block; 66. Second transmission cone surface; 7. Locking bolt; 8. Stacked spring; 91. Separator; 92. Main body. Detailed Implementation

[0018] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0019] like Figures 1 to 3 As shown, an embodiment of the present invention proposes a pneumatic separation and unlocking device for a non-pyrotechnic separation nut of a launch vehicle, comprising: The housing 1 is connected to the separator 91. A positioning hole 12 is provided through the bottom surface of the housing 1, and the positioning hole 12 corresponds to the through hole of the separator 91 and the main body 92. The separation nut 6 is disposed in the inner cavity of the housing 1. The separation nut 6 is a hollow column structure formed by multiple arc-shaped parts joined together radially. The inner wall of the separation nut 6 is provided with internal threads. The outer wall of the separation nut 6 is formed with multiple second limiting protrusions 61 and multiple second receiving cavities 62. The multiple second limiting protrusions 61 and multiple second receiving cavities 62 are alternately distributed along the axial direction of the separation nut 6. A stacked spring 8 is disposed on the bottom surface of the inner casing 1, and a release nut 6 passes through the stacked spring 8. The inner shell 3 has a tubular structure and is set inside the shell 1. The release nut 6 is located in the inner cavity of the inner shell 3. The bottom surface of the inner shell 3 abuts against the stacked spring 8. The inner cavity of the inner shell 3 is formed with multiple first limiting protrusions 31 and multiple first receiving cavities 32. The multiple first limiting protrusions 31 and multiple first receiving cavities 32 are alternately distributed along the axial direction of the inner shell 3. The multiple first limiting protrusions 31 are adapted to multiple second receiving cavities 62. The multiple second limiting protrusions 61 are adapted to multiple first receiving cavities 32. Pressure cover 4 is located above inner shell 3. The bottom surface of pressure cover 4 is provided with an elastic pressure member. The pressure part of the elastic pressure member abuts against the upper end of release nut 6. Inflatable end cap 2 is detachably connected to the upper part of housing 1. Inflatable end cap 2 has an inflation port 21 on its surface, and the inflation port 21 is connected to the air supply device through an air pipe. The locking bolt 7 has its end passing through the through hole and positioning hole 12 of the body 92 and the separator 91 in sequence, and the end of the locking bolt 7 extends into the inner cavity of the separator nut 6. The external thread of the locking bolt 7 is adapted to the internal thread. When the multiple first limiting protrusions 31 correspond to the multiple second limiting protrusions 61, the internal thread of the separator nut 6 engages and locks with the external thread of the locking bolt 7.

[0020] In this embodiment, during connection, the separating body 91 and the main body 92 are abutted together, with their through holes coaxially corresponding. The end of the locking bolt 7 is sequentially passed through the through holes of the separating body 91 and the main body 92, allowing the end of the locking bolt 7 to enter the inner cavity of the housing 1, and the screwing end of the locking bolt 7 is in close contact with the main body 92. The stacked spring 8 is placed in the inner cavity of the housing 1, with the end of the locking bolt 7 passing through the inner cavity of the stacked spring 8. The separating nut 6 is placed inside the inner shell 3, so that the separating nut 6 is in a separated state, and multiple second limiting protrusions 61 enter multiple first receiving cavities 32, and multiple first limiting protrusions 31 enter multiple second receiving cavities 62. The inner shell 3 is placed in the inner cavity of the housing 1, with the bottom surface of the inner shell 3 abutting against the stacked spring 8, and the end of the locking bolt 7 entering the separating nut 6. Inside, the inner shell 3 is pressed down, causing the stacked spring 8 to contract. The release nut 6 accurately aligns with the locking bolt 7, moving the release nut 6 radially toward the locking bolt 7. This causes the internal thread of the release nut 6 to engage with the external thread of the locking bolt 7, locking it in place. The pressure on the inner shell 3 is released, and the elastic force of the stacked spring 8 drives the inner shell 3 to move until multiple first limiting protrusions 31 correspond to and abut with multiple second limiting protrusions 61, thereby limiting and fixing the release nut 6. This locks the release nut 6 and the locking bolt 7, thus connecting the separator 91 to the main body 92. The pressure cover 4 is placed inside the shell 1, so that the pressure part of the elastic pressure member abuts against the upper end of the release nut 6. The pressure cover 4 abuts against the inner shell 3. The inflation end cap 2 is connected to the upper part of the shell 1. Figure 1 As shown, the inflation port 21 is connected to the air supply device through an air pipe; When separation of the separator 91 from the main body 92 is required, the solenoid valve of the air supply device opens, injecting gas with a preset pressure value into the housing 1 through the air pipe and the air inlet 21. The gas pressure applies pressure to the pressure cover 4, which in turn applies pressure to the inner housing 3, overcoming the elastic force of the stacked spring 8. The pressure cover 4 and the inner housing 3 move within the housing 1 and away from the air inlet cap 2. Simultaneously, the elastic pressure member applies pressure to the separation nut 6. As the inner housing 3 moves, when multiple first limiting protrusions 31 correspond to multiple second receiving cavities 62, and vice versa, under the pressure of the elastic pressure member, the separation nut 6 separates along its radial direction. Figure 3 As shown, the internal thread of the separating nut 6 completely disengages from the external thread of the locking bolt 7, releasing the locking bolt 7. After the separating nut 6 is completely separated, the elastic pressure member will contact the end of the locking bolt 7. Under the pressure of the elastic pressure member, the locking bolt 7 will disengage from the through hole of the separating body 91 and the main body 92, thereby releasing the connection between the separating body 91 and the main body 92 and realizing the separation of the separating body 91 and the main body 92. The separation nut 6 is separated by pneumatic drive in conjunction with the pressure cover 4 and the elastic pressure component, thereby releasing the locking bolt 7 and separating the separation body 91 from the main body 92. This process does not cause damage to the components and allows for reuse.

[0021] In this embodiment, the main body 92 is the main body of the launch vehicle, and the separation body 91 can be a booster, fairing, etc.; the gas supply device is installed on the main body 92.

[0022] This embodiment uses high-pressure gas controlled by a solenoid valve or an electro-explosive valve as a power source for separation and unlocking. In specific applications, the power source may include, but is not limited to, chemical energy generated by a gas generator, mechanical energy generated by a shape memory alloy, and high-pressure gas controlled by a solenoid valve or an electro-explosive valve. For example, the power source may be chemical energy generated by a gas generator. The gas generator is connected to the inflation port 21, and the chemical energy generated by the gas generator acts on the pressure cover 4 to achieve the separation and unlocking process. Alternatively, the power source may be mechanical energy generated by a shape memory alloy. The mechanical energy output end of the shape memory alloy device is inserted into the inflation port 21, and the mechanical energy output end abuts against the pressure cover 4. The mechanical energy of the shape memory alloy device acts on the pressure cover 4 to achieve the separation and unlocking process.

[0023] like Figure 1 As shown, in an optional embodiment of the present invention, the bottom surface of the inflatable end cap 2 is formed with a connecting ring 22, and the connecting ring 22 is threadedly connected to the upper part of the inner cavity of the housing 1.

[0024] In this embodiment, the connecting ring 22 is threadedly connected to the inner cavity of the housing 1, which facilitates the detachable connection between the inflatable end cap 2 and the housing 1.

[0025] like Figure 1 and Figure 3 As shown, in an optional embodiment of the present invention, the elastic pressure-applying member includes: Pressure block 52, the bottom surface of pressure block 52 abuts against the upper end of release nut 6; Spring 51, with its two ends abutting against pressure cover 4 and pressure block 52 respectively.

[0026] In this embodiment, the spring force of the spring 51 is used to make the pressure block 52 abut against the upper end of the separation nut 6. During the separation and unlocking process, the spring 51 and the pressure block 52 are used to apply pressure to the separation nut 6 to achieve complete separation of the separation nut 6.

[0027] like Figure 1 As shown, in an optional embodiment of the present invention, a fixing post 41 is formed on the bottom surface of the pressure cover 4, and the fixing post 41 is inserted into the upper end of the spring 51. The surface of the pressure block 52 is formed with a groove 53, and the bottom end of the spring 51 is inserted into the groove 53.

[0028] In this embodiment, the upper end of the spring 51 is fixed by inserting the fixing post 41 into the upper end of the spring 51; the bottom end of the spring 51 is fixed to the pressure block 52 by the groove 53, ensuring that the spring 51 can accurately apply pressure to the pressure block 52, thereby ensuring the uniformity and stability of the pressure applied by the pressure block 52 to the separation nut 6.

[0029] like Figure 2 As shown, in an optional embodiment of the present invention, the bottom surface of the pressure block 52 is formed with a fourth guide cone surface 54; The upper end of the release nut 6 is formed with a third guide cone surface 64, which is adapted to the fourth guide cone surface 54 to drive the release nut 6 to separate radially.

[0030] In this embodiment, the third guide cone surface 64 and the fourth guide cone surface 54 cooperate to guide the release nut 6, so that the pressure block 52 applies a force to the release nut 6 in the axial and radial directions, ensuring that the release nut 6 is accurately and fully separated under the pressure of the pressure block 52.

[0031] like Figure 2 As shown, in an optional embodiment of the present invention, a plurality of arc-shaped blocks 65 are formed on the third guide cone surface 64. When the internal thread of the separating nut 6 engages and locks with the external thread of the locking bolt 7, the plurality of arc-shaped blocks 65 abut against the outer wall of the pressure block 52.

[0032] In this embodiment, the pressure block 52 is positioned by multiple arc-shaped blocks 65 abutting against the outer wall of the pressure block 52, ensuring that the pressure block 52 is coaxial with the release nut 6, thereby ensuring the accuracy of the force applied by the pressure block 52 to the release nut 6.

[0033] like Figure 1 As shown, in an optional embodiment of the present invention, the pneumatic separation and unlocking device for the non-pyrotechnic separation nut of the launch vehicle further includes: The first guide cone surface 11 is formed on the inner bottom surface of the housing 1. The first guide cone surface 11 is coaxially arranged with the positioning hole 12 and is located in the inner cavity of the stacked spring 8. The second guide cone surface 63 is formed at the bottom of the release nut 6. The second guide cone surface 63 is adapted to the first guide cone surface 11 to drive the release nut 6 to separate radially.

[0034] In this embodiment, the first guide cone 11 and the second guide cone 63 guide the separating nut 6 so that the separating nut 6 bears a force along its radial direction. When the pressure block 52 applies pressure to the separating nut 6, it helps the separating nut 6 to separate accurately and fully, thereby releasing the locking bolt 7.

[0035] like Figure 1As shown, in an optional embodiment of the present invention, the pneumatic separation and unlocking device for the non-pyrotechnic separation nut of the launch vehicle further includes: Positioning ring 42 is formed on the bottom surface of pressure cover 4. Positioning ring 42 is inserted into the upper end of the inner cavity of inner shell 3 and abuts against the inner wall of inner shell 3.

[0036] In this embodiment, the positioning ring 42 is inserted into the inner cavity of the inner shell 3 to achieve the positioning of the pressure cover 4 and the inner shell 3, ensuring that the pressure cover 4 can fully and evenly transmit the gas pressure to the inner shell 3, thus ensuring the smooth realization of separation and unlocking.

[0037] like Figure 1 As shown, in an optional embodiment of the present invention, the pneumatic separation and unlocking device for the non-pyrotechnic separation nut of the launch vehicle further includes: A first transmission cone surface 34 formed on the surface of a plurality of first limiting protrusions 31; A second transmission cone surface 66 is formed on the bottom surface of a plurality of second limiting protrusions 61. The second transmission cone surface 66 is adapted to the first transmission cone surface 34 to drive the release nut 6 radially away from the inner wall of the inner shell 3.

[0038] In this embodiment, during installation, the separating nut 6 is placed inside the inner shell 3, so that the separating nut 6 is in a separated state, and multiple second limiting protrusions 61 enter multiple first receiving cavities 32, and multiple first limiting protrusions 31 enter multiple second receiving cavities 62; the inner shell 3 is placed in the inner cavity of the shell 1, the bottom surface of the inner shell 3 abuts against the stacked spring 8, the end of the locking bolt 7 enters the interior of the separating nut 6, the inner shell 3 is pressed down, causing the stacked spring 8 to contract, the separating nut 6 accurately corresponds to the locking bolt 7, so that the separating nut 6 moves towards the locking bolt 7 in its radial direction, so that the internal thread of the separating nut 6 engages and locks with the external thread of the locking bolt 7, releasing the pressure on the inner shell 3, and using the elastic force of the stacked spring 8 to drive the inner shell 3 to move, the inner shell 3 moves relative to the separating nut 6, and through the first transmission cone surface 34 and the second transmission cone surface 66, the inner shell 3 can apply a radial force to the separating nut 6, which helps the separating nut 6 move towards the locking bolt 7 in its radial direction, so that the internal thread of the separating nut 6 engages and locks with the external thread of the locking bolt 7.

[0039] like Figure 1 As shown, in an optional embodiment of the present invention, the pneumatic separation and unlocking device for the non-pyrotechnic separation nut of the launch vehicle further includes: Multiple sealing rings 33 are embedded in the annular groove on the outer side of the inner shell 3, and the multiple sealing rings 33 are in close contact with the inner wall of the shell 1.

[0040] In this embodiment, by embedding multiple sealing rings 33 on the outside of the inner shell 3, the sealing between the inner shell 3 and the outer shell 1 can be improved, preventing air leakage, ensuring the pressure effect of the gas on the pressure cover 4, and ensuring smooth separation and unlocking.

[0041] The non-pyrotechnic separation nut pneumatic unlocking device for launch vehicles provided in the above embodiments of the present invention, through the opening of the solenoid valve of the gas supply device, injects gas with a preset pressure value into the housing 1 through the gas pipe and the inflation port 21. The gas pressure applies pressure to the pressure cover 4, which in turn applies pressure to the inner housing 3, overcoming the elastic force of the stacked spring 8. The pressure cover 4 and the inner housing 3 move within the housing 1 and away from the inflation end cover 2. Simultaneously, the spring 51 and the pressure block 52 apply pressure to the separation nut 6. As the inner housing 3 moves, when multiple first limiting protrusions 31 correspond to multiple second receiving cavities 62, and multiple second limiting protrusions 61 correspond to multiple first receiving cavities 32, under the pressure of the spring 51 and the pressure block 52, guided by the third guide cone surface 64 and the fourth guide cone surface 54, and guided by the first guide cone surface 11 and the second guide cone surface 63, the separation nut 6 separates along its radial direction. Figure 3 As shown, the internal thread of the release nut 6 completely disengages from the external thread of the locking bolt 7, releasing the locking bolt 7. After the release nut 6 is completely separated, the pressure block 52 will contact the end of the locking bolt 7. Under the pressure of the spring 51 and the pressure block 52, the locking bolt 7 will disengage from the through hole of the separating body 91 and the main body 92, thereby releasing the connection between the separating body 91 and the main body 92, facilitating the separation of the separating body 91 and the main body 92. The separation of the release nut 6 is achieved by pneumatic drive in conjunction with the pressure cover 4 and the elastic pressure component, releasing the locking bolt 7. The separation of the separator 91 from the main body 92 is achieved without damaging the components, allowing for reuse. Sealant is applied to the threaded connection between the connecting ring 22 and the inner cavity of the housing 1 to ensure the airtight connection between the inflation end cap 2 and the housing 1. Multiple sealing rings 33 enhance the sealing between the inner shell 3 and the housing 1, thus forming a sealed cavity inside the pneumatic separation and unlocking device of the launch vehicle's non-pyrotechnic separation nut. Only one power source inlet, the inflation port 21, ensures that the power source can accurately and fully act on the pressure cover 4, guaranteeing a smooth separation and unlocking process.

[0042] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A pneumatic separation and unlocking device for a non-pyrotechnic separation nut of a launch vehicle, characterized in that, include: The housing (1) is connected to the separator (91), and a positioning hole (12) is provided through the bottom surface of the housing (1). The positioning hole (12) corresponds to the through hole of the separator (91) and the main body (92). A separation nut (6) is disposed in the inner cavity of the housing (1). The separation nut (6) is a hollow column structure formed by multiple arc-shaped parts joined together radially. The inner wall of the separation nut (6) is provided with internal threads. The outer wall of the separation nut (6) is formed with multiple second limiting protrusions (61) and multiple second receiving cavities (62). The multiple second limiting protrusions (61) and multiple second receiving cavities (62) are alternately distributed along the axial direction of the separation nut (6). A stacked spring (8) is disposed on the inner bottom surface of the housing (1), and the release nut (6) passes through the stacked spring (8). The inner shell (3) has a tubular structure and is disposed inside the shell (1). The separation nut (6) is located in the inner cavity of the inner shell (3). The bottom surface of the inner shell (3) abuts against the stacked spring (8). The inner cavity of the inner shell (3) is formed with multiple first limiting protrusions (31) and multiple first receiving cavities (32). The multiple first limiting protrusions (31) and multiple first receiving cavities (32) are alternately distributed along the axial direction of the inner shell (3). The multiple first limiting protrusions (31) are adapted to multiple second receiving cavities (62). The multiple second limiting protrusions (61) are adapted to multiple first receiving cavities (32). Pressure cover (4), the pressure cover (4) is located above the inner shell (3), the bottom surface of the pressure cover (4) is provided with an elastic pressure member, the pressure part of the elastic pressure member abuts against the upper end of the separation nut (6); An inflatable end cap (2) is detachably connected to the upper part of the housing (1). An inflation port (21) is provided on the surface of the inflatable end cap (2). The inflation port (21) is connected to the air supply device through an air pipe. The locking bolt (7) has its end passing through the through hole of the body (92) and the separation body (91) and the positioning hole (12) in sequence, and the end of the locking bolt (7) extends into the inner cavity of the separation nut (6). The external thread of the locking bolt (7) is adapted to the internal thread. When multiple first limiting protrusions (31) correspond to multiple second limiting protrusions (61), the internal thread of the separation nut (6) engages and locks with the external thread of the locking bolt (7).

2. The pneumatic separation and unlocking device for the non-pyrotechnic separation nut of a launch vehicle according to claim 1, characterized in that, The bottom surface of the inflatable end cap (2) is formed with a connecting ring (22), which is threaded to the upper part of the inner cavity of the housing (1).

3. The pneumatic separation and unlocking device for the non-pyrotechnic separation nut of a launch vehicle according to claim 1, characterized in that, The elastic pressure-applying component includes: The bottom surface of the pressure block (52) abuts against the upper end of the release nut (6); Spring (51), the two ends of which abut against the pressure cover (4) and the pressure block (52) respectively.

4. The pneumatic separation and unlocking device for the non-pyrotechnic separation nut of a launch vehicle according to claim 3, characterized in that, The bottom surface of the pressure cover (4) is formed with a fixing post (41), and the fixing post (41) is inserted into the upper end of the spring (51); The surface of the pressure block (52) is formed with a groove (53), and the bottom end of the spring (51) is inserted into the groove (53).

5. The pneumatic separation and unlocking device for the non-pyrotechnic separation nut of a launch vehicle according to claim 3, characterized in that, The bottom surface of the pressure block (52) is formed with a fourth guide cone surface (54); The upper end of the separating nut (6) is formed with a third guide cone surface (64), which is adapted to the fourth guide cone surface (54) to drive the separating nut (6) to separate radially.

6. The pneumatic separation and unlocking device for the non-pyrotechnic separation nut of a launch vehicle according to claim 5, characterized in that, Multiple arc-shaped blocks (65) are formed on the third guide cone surface (64). When the internal thread of the separation nut (6) engages and clamps with the external thread of the locking bolt (7), the multiple arc-shaped blocks (65) abut against the outer wall of the pressure block (52).

7. The pneumatic separation and unlocking device for the non-pyrotechnic separation nut of a launch vehicle according to claim 1, characterized in that, Also includes: The first guide cone surface (11) is formed on the inner bottom surface of the housing (1). The first guide cone surface (11) is coaxially arranged with the positioning hole (12). The first guide cone surface (11) is located in the inner cavity of the stacked spring (8). The second guide cone (63) is formed at the bottom of the release nut (6) and is adapted to the first guide cone (11) to drive the release nut (6) to separate radially.

8. The pneumatic separation and unlocking device for the non-pyrotechnic separation nut of a launch vehicle according to claim 1, characterized in that, Also includes: Positioning ring (42) is formed on the bottom surface of the pressure cover (4). The positioning ring (42) is inserted into the upper end of the inner cavity of the inner shell (3) and abuts against the inner wall of the inner shell (3).

9. The pneumatic separation and unlocking device for the non-pyrotechnic separation nut of a launch vehicle according to claim 1, characterized in that, Also includes: The first transmission cone surface (34) is formed on the surface of multiple first limiting protrusions (31); A second drive cone (66) is formed on the bottom surface of a plurality of second limiting protrusions (61), the second drive cone (66) being adapted to the first drive cone (34) to drive the release nut (6) radially away from the inner wall of the inner shell (3).

10. The pneumatic separation and unlocking device for the non-pyrotechnic separation nut of a launch vehicle according to claim 1, characterized in that, Also includes: Multiple sealing rings (33) are embedded in an annular groove on the outer side of the inner shell (3), and the multiple sealing rings (33) are in close contact with the inner wall of the shell (1).

Images