Non-pyrotechnic separation nut rotation unlocking device of carrier rocket

Abstract

The invention provides a non-firework separation nut rotation unlocking device of a carrier rocket, which is characterized in that a shell is connected with a separation body, a separation nut is arranged in an inner cavity of the shell, and a plurality of convex blocks are uniformly arranged on the outer wall of the separation nut along the circumferential direction of the separation nut; the inner shell is arranged in the shell, a plurality of containing cavities are formed in the inner wall of the inner shell, and the containing cavities are matched with the protruding blocks; an elastic pressing piece is arranged on the bottom surface of the pressing cover, and a pressing part of the elastic pressing piece abuts against the upper end of the separation nut; the guide assembly is arranged between the shell and the inner shell, and when the pressing cover presses the inner shell to descend, the guide assembly drives the inner shell to rotate along the axis of the inner shell; and the external thread of the locking bolt is matched with the internal thread. According to the scheme, a pneumatic driving mode is matched with the pressing cover and the guide assembly to achieve rotation of the inner shell, limiting of the separation nut is relieved, the separation nut is separated through the elastic pressing piece, locking of the locking bolt is relieved, damage-free separation of the separation body and the body is conveniently achieved, and repeated utilization of parts 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 nut rotation unlocking device for launch vehicles. 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 nut rotation unlocking device for launch vehicles. The device uses a pneumatic drive to rotate the inner shell in conjunction with a pressure cover and a guide assembly to release the restriction on the separation nut. An elastic pressure member applies pressure to the separation nut, causing it to separate and releasing the locking bolt. This facilitates the non-damaging separation of the separation body from the main body and enables the reuse of the components.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: A non-pyrotechnic separation nut rotation unlocking device for a launch vehicle 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, and the outer wall of the separation nut is uniformly provided with multiple protrusions along its circumference. The inner shell has a tubular structure and is disposed inside the outer shell. The separating nut is located in the inner cavity of the inner shell. The inner wall of the inner shell is uniformly provided with multiple receiving cavities along its circumference, and the multiple receiving cavities are adapted to multiple protrusions. 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. A guide assembly is disposed between the outer shell and the inner shell. When the pressure cover applies pressure to the inner shell and it descends, the guide assembly drives the inner shell to rotate along its axis. An inflatable end cap is detachably connected to the upper part of the housing, and an inflation port is provided on the surface of the inflatable end cap. 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, and the external thread of the locking bolt is adapted to the internal thread.

[0006] Optionally, the guidance component includes: Multiple spiral grooves are provided through the outer wall of the housing; Multiple guide posts are provided, with the first end of each guide post fixedly disposed in multiple fixing holes on the outer wall of the inner shell, and the second end of each guide post slidingly engaging with multiple spiral grooves.

[0007] Optionally, the non-pyrotechnic separation nut rotation unlocking device of the launch vehicle further includes: A first guide cone surface is formed on the inner bottom surface of the housing, and the first guide cone surface is coaxially arranged with the positioning hole. 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.

[0008] 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.

[0009] Optionally, the non-pyrotechnic separation nut rotation unlocking device of the launch vehicle further includes: A first positioning ring is formed at the upper end of the inner shell; The second positioning ring is formed on the bottom surface of the pressure cover and is inserted into the first positioning ring.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] Optionally, the non-pyrotechnic separation nut rotation 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-mentioned solution of the present invention uses a pneumatic drive to rotate the inner shell in conjunction with the pressure cover and guide assembly to release the restriction on the separation nut. The separation nut is then separated by the elastic pressure member, releasing the locking bolt. This facilitates the non-damaging separation of the separator from the main body and enables the reuse of the components. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the non-pyrotechnic separation nut rotation unlocking device of the launch vehicle in the locked state according to an embodiment of the present invention; Figure 2 yes Figure 1 Enlarged schematic diagram of part A; Figure 3 This is a top sectional view of the housing of the non-pyrotechnic separation nut rotation unlocking device of the launch vehicle in the locked state, as provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the unlocked state of the non-pyrotechnic separation nut rotation unlocking device for a launch vehicle provided in an embodiment of the present invention; Figure 5 This is a top sectional view of the housing of the non-pyrotechnic separation nut rotation unlocking device of the launch vehicle provided in an embodiment of the present invention in the unlocked state; Figure 6 This is a three-dimensional structural diagram of the housing in the non-pyrotechnic separation nut rotation unlocking device of the 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; 13. Spiral groove; 2. Inflation end cap; 21. Inflation port; 22. Connecting ring; 3. Inner shell; 31. First positioning ring; 32. Sealing ring; 33. Guide post; 34. Fixing hole; 35. Receiving cavity; 4. Pressure cover; 41. Second positioning ring; 42. Fixing post; 5. Separating nut; 51. Second guide cone surface; 52. Third guide cone surface; 53. Arc block; 54. Protrusion; 6. Locking bolt; 7. Separating body; 8. Main body; 91. Spring; 92. Pressure block; 93. Groove; 94. Fourth guide cone surface. 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 6 As shown, an embodiment of the present invention provides a non-pyrotechnic separation nut rotation unlocking device for a launch vehicle, comprising: The housing 1 is connected to the separator 7. 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 7 and the main body 8. The separation nut 5 is located in the inner cavity of the housing 1. The separation nut 5 is a hollow column structure formed by multiple arc-shaped parts joined together radially. The inner wall of the separation nut 5 is provided with internal threads, and the outer wall of the separation nut 5 is uniformly provided with multiple protrusions 54 along its circumference. The inner shell 3 has a tubular structure and is set inside the shell 1. The separation nut 5 is located in the inner cavity of the inner shell 3. The inner wall of the inner shell 3 is uniformly provided with multiple receiving cavities 35 along its circumference. The multiple receiving cavities 35 are adapted to multiple protrusions 54. 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 5. The guide assembly is located between the housing 1 and the inner housing 3. When the pressure cover 4 applies pressure to the inner housing 3 and it descends, the guide assembly drives the inner housing 3 to rotate along its axis. Inflatable end cap 2 is detachably connected to the upper part of the housing 1, and an inflation port 21 is provided on the surface of the inflatable end cap 2. The locking bolt 6 has its end passing through the through hole and positioning hole 12 of the body 8 and the separator 7 in sequence, and the end of the locking bolt 6 extends into the inner cavity of the separator nut 5. The external thread of the locking bolt 6 is compatible with the internal thread.

[0020] In this embodiment, during connection, the separating body 7 abuts against the main body 8, with their through holes coaxially corresponding. The end of the locking bolt 6 passes through the through holes of both the main body 8 and the separating body 7 in sequence, allowing the end of the locking bolt 6 to enter the inner cavity of the housing 1, and the screwing end of the locking bolt 6 to be in close contact with the main body 8. The separating nut 5 is placed inside the inner shell 3, in a separated state, and multiple protrusions 54 enter multiple receiving cavities 35 respectively. The inner shell 3 is placed inside the inner cavity of the housing 1, and the guide assembly is connected between the inner shell 3 and the housing 1. The separating nut 5 is moved radially toward the locking bolt 6. The release nut 5 is brought together, and its internal thread engages with the external thread of the locking bolt 6. The inner shell 3 is rotated, causing the multiple receiving cavities 35 and multiple protrusions 54 to be staggered, and the inner wall of the inner shell 3 to fully contact the sides of the multiple protrusions 54. This limits and fixes the release nut 5, placing it in a locked state with the locking bolt 6, thus connecting the release body 7 to the main body 8. The pressure cap 4 is placed inside the shell, abutting against the inner shell 3, and the pressure-applying part of the elastic pressure-applying component abuts against the upper end of the release nut 5. 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 7 from the main body 8 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, causing the inner housing 3 to descend relative to the housing 1. The guide assembly drives the inner housing 3 to rotate along its axis. Simultaneously, the elastic pressure component applies pressure to the separation nut 5. As the inner housing 3 rotates, when the multiple receiving cavities 35 correspond to the multiple protrusions 54, the limiting fixation of the multiple separation nuts 5 is released. Under the pressure of the elastic pressure component, the separation nuts 5 separate radially, and the separation nuts 5 are completely separated. The multiple protrusions 54 enter the multiple receiving cavities 35, as... Figure 4 and Figure 5 As shown; the internal thread of the separating nut 5 is completely disengaged from the external thread of the locking bolt 6, releasing the locking and fixing of the locking bolt 6. The pressure part of the elastic pressure member contacts the locking bolt 6 and applies pressure to the locking bolt 6, causing the locking bolt 6 to disengage from the through hole of the separating body 7 and the body 8, thereby contacting the connection between the separating body 7 and the body 8 and realizing the separation of the separating body 7 and the body 8. The inner shell 3 is rotated by pneumatic drive in conjunction with the pressure cover 4 and the guide assembly to release the limit on the separation nut 5. The separation nut 5 is then separated by the elastic pressure member, releasing the locking bolt 6. This facilitates the separation of the separation body 7 from the main body 8 without damage and enables the reuse of the parts.

[0021] In this embodiment, the main body 8 is the main body of the launch vehicle, and the separation body 7 can be a booster, fairing, etc.; the gas supply device is installed on the main body 8.

[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 3 and Figure 6 As shown, in an optional embodiment of the present invention, the guiding component includes: Multiple spiral grooves 13 are provided through the outer wall of the housing 1; Multiple guide posts 33, the first ends of which are fixedly disposed in multiple fixing holes 34 on the outer wall of the inner shell 3, and the second ends of which are respectively slidably engaged with multiple spiral grooves 13.

[0024] In this embodiment, the second ends of the multiple guide posts 33 are slidably engaged with the multiple spiral grooves 13. When the pressure cover 4 applies pressure to make the inner shell 3 descend relative to the shell 1, the inner shell 3 rotates along its axis under the guidance of the multiple guide posts 33 and the multiple spiral grooves 13. Specifically, the connection between the first end of the multiple guide posts 33 and the multiple fixing holes 34 can be a detachable connection method such as threaded connection, while ensuring the stability of the multiple guide posts 33. In the specific connection, the inner shell 3 is placed inside the outer shell 1, so that the multiple fixing holes 34 correspond to the multiple spiral grooves 13. The first ends of the multiple guide posts 33 pass through the multiple spiral grooves 13 and are connected in the multiple fixing holes 34, thereby realizing the connection between the multiple guide posts 33 and the inner shell 3. The second ends of the multiple guide posts 33 slide with the multiple spiral grooves 13, thereby guiding the inner shell 3 to rotate along its axis through the cooperation of the multiple guide posts 33 and the multiple spiral grooves 13.

[0025] like Figure 1 As shown, in an optional embodiment of the present invention, the non-pyrotechnic separation nut rotation unlocking device for the launch vehicle further includes: The first guide cone surface 11 is formed on the inner bottom surface of the housing 1, and the first guide cone surface 11 is coaxially arranged with the positioning hole 12. The second guide cone surface 51 is formed at the bottom of the release nut 5. The second guide cone surface 51 is adapted to the first guide cone surface 11 to drive the release nut 5 to separate radially.

[0026] In this embodiment, the first guide cone 11 and the second guide cone 51 cooperate to guide the separating nut 5, so that the separating nut 5 bears the force in its radial direction. When the elastic pressure member applies pressure to the upper end of the separating nut 5, it helps the separating nut 5 to separate accurately and fully, and release the locking bolt 6.

[0027] 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.

[0028] In this embodiment, the threaded connection between the connecting ring 22 and the inner cavity of the housing 1 facilitates the detachable connection between the inflatable end cap 2 and the housing 1. Specifically, sealant is applied to the threaded connection between the connecting ring 22 and the inner cavity of the housing 1 to ensure a sealed connection.

[0029] like Figure 1 As shown, in an optional embodiment of the present invention, the non-pyrotechnic separation nut rotation unlocking device for the launch vehicle further includes: The first positioning ring 31 is formed on the upper end of the inner shell 3; The second positioning ring 41 is formed on the bottom surface of the pressure cover 4, and the second positioning ring 41 is inserted and engaged with the first positioning ring 31.

[0030] In this embodiment, the positioning between the pressure cover 4 and the inner shell 3 is achieved by the cooperation of the first positioning ring 31 and the second positioning ring 41, ensuring the accuracy and stability of the pressure applied by the pressure cover 4 to the inner shell 3, and ensuring the smooth realization of separation and unlocking.

[0031] like Figure 2 As shown, in an optional embodiment of the present invention, the elastic pressure-applying member includes: Pressure block 92, the bottom surface of pressure block 92 abuts against the upper end of release nut 5; Spring 91, with its two ends abutting against pressure cover 4 and pressure block 92 respectively.

[0032] In this embodiment, the spring force of the spring 91 is used to make the pressure block 92 abut against the upper end of the separation nut 5. During the separation and unlocking process, the spring 91 and the pressure block 92 are used to apply pressure to the separation nut 5 to achieve complete separation of the separation nut 5.

[0033] like Figure 2 As shown, in an optional embodiment of the present invention, a fixing post 42 is formed on the bottom surface of the pressure cover 4, and the fixing post 42 is inserted into the upper end of the spring 91. The surface of the pressure block 92 is formed with a groove 93, and the bottom end of the spring 91 is inserted into the groove 93.

[0034] In this embodiment, the upper end of the spring 91 is fixed by inserting the fixing post 42 into the upper end of the spring 91; the bottom end of the spring 91 is fixed to the pressure block 92 by the groove 93, ensuring that the spring 91 can accurately apply pressure to the pressure block 92, thereby ensuring the uniformity and stability of the pressure applied by the pressure block 92 to the separation nut 5.

[0035] like Figure 2 As shown, in an optional embodiment of the present invention, the bottom surface of the pressure block 92 is formed with a fourth guide cone surface 94; The upper end of the release nut 5 is formed with a third guide cone surface 52, which is adapted to the fourth guide cone surface 94 to drive the release nut 5 to separate radially.

[0036] In this embodiment, the third guide cone surface 52 and the fourth guide cone surface 94 cooperate to guide the nut, so that the pressure block 92 applies a force to the separating nut 5 in the axial and radial directions, ensuring that the separating nut 5 is accurately and fully separated under the pressure of the pressure block 92.

[0037] like Figure 2 As shown, in an optional embodiment of the present invention, a plurality of arc-shaped blocks 53 are formed on the third guide cone surface 52. When the internal thread of the separating nut 5 engages and locks with the external thread of the locking bolt 6, the plurality of arc-shaped blocks 53 abut against the outer wall of the pressure block 92.

[0038] In this embodiment, the pressure block 92 is positioned by multiple arc-shaped blocks 53 abutting against the outer wall of the pressure block 92, ensuring that the pressure block 92 is coaxial with the separating nut 5, thereby ensuring the accuracy and uniformity of the force applied by the pressure block 92 to the separating nut 5.

[0039] like Figure 1 As shown, in an optional embodiment of the present invention, the non-pyrotechnic separation nut rotation unlocking device for the launch vehicle further includes: Multiple sealing rings 32 are embedded in an annular groove on the outer side of the inner shell 3, and the multiple sealing rings 32 are in close contact with the inner wall of the shell 1.

[0040] In this embodiment, by embedding multiple sealing rings 32 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 rotation 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 shell 1 through the gas pipe and the gas inlet 21. The pressure of the gas is used to pressurize the pressure cover 4, which in turn pressurizes the inner shell 3, causing the inner shell 3 to descend relative to the shell 1. The inner shell 3 is driven to rotate along its axis by the guide assembly, while the elastic pressure member presses the separation nut 5. As the inner shell 3 rotates, when the multiple receiving cavities 35 correspond to the multiple protrusions 54, the limiting fixation of the multiple separation nuts 5 is released. Under the pressure of the elastic pressure member, the separation nuts 5 separate in their radial direction. The separation nuts 5 are completely separated, and the multiple protrusions 54 enter the multiple receiving cavities 35, such as... Figure 4 and Figure 5 As shown; the internal thread of the separating nut 5 completely disengages from the external thread of the locking bolt 6, releasing the locking bolt 6. The pressure part of the elastic pressure member contacts the locking bolt 6 and applies pressure to the locking bolt 6, causing the locking bolt 6 to disengage from the through hole of the separating body 7 and the main body 8, thereby reconnecting the separating body 7 and the main body 8 and achieving the separation of the separating body 7 from the main body 8; the inner shell 3 is rotated by pneumatic drive in conjunction with the pressure cover 4 and the guide assembly to release the limiting position of the separating nut 5. The elastic pressure member applies pressure to the separating nut 5, causing the separating nut 5 to separate and release the locking bolt 6. Tightening the locking bolt 6 facilitates the non-damaging separation of the separator 7 from the main body 8, enabling the reuse of components. 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 32 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. With only one power source inlet (inflation port 21), the power source can accurately and fully act on the pressure cover 4, ensuring 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 non-pyrotechnic separation nut rotation unlocking device for a launch vehicle, characterized in that, include: The housing (1) is connected to the separator (7). The bottom surface of the housing (1) is provided with a positioning hole (12), which corresponds to the through hole of the separator (7) and the main body (8). Separating nut (5), the separating nut (5) is disposed in the inner cavity of the housing (1), the separating nut (5) is a hollow column structure formed by multiple arc-shaped parts joined together radially, the inner wall of the separating nut (5) is provided with internal thread, and the outer wall of the separating nut (5) is uniformly provided with multiple protrusions (54) along its circumference. The inner shell (3) has a tubular structure and is located inside the shell (1). The separation nut (5) is located in the inner cavity of the inner shell (3). The inner wall of the inner shell (3) is uniformly provided with multiple receiving cavities (35) along its circumferential direction. The multiple receiving cavities (35) are adapted to multiple protrusions (54). 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 (5); A guide assembly is disposed between the housing (1) and the inner housing (3). When the pressure cover (4) applies pressure to the inner housing (3) to descend, the guide assembly drives the inner housing (3) to rotate along its axis. An inflatable end cap (2) is detachably connected to the upper part of the housing (1), and an inflation port (21) is provided on the surface of the inflatable end cap (2). The locking bolt (6) has its end passing through the through hole of the body (8) and the separation body (7) and the positioning hole (12) in sequence, and the end of the locking bolt (6) extends into the inner cavity of the separation nut (5). The external thread of the locking bolt (6) is adapted to the internal thread.

2. The non-pyrotechnic separation nut rotation unlocking device for a launch vehicle according to claim 1, wherein the guiding assembly comprises: Multiple spiral grooves (13) are provided through the outer wall of the housing (1); Multiple guide posts (33) are provided. The first end of the multiple guide posts (33) is fixedly disposed in multiple fixing holes (34) on the outer wall of the inner shell (3). The second end of the multiple guide posts (33) is slidably engaged with multiple spiral grooves (13).

3. The non-pyrotechnic separation nut rotation unlocking device for 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), and the first guide cone surface (11) is coaxially arranged with the positioning hole (12); The second guide cone (51) is formed at the bottom of the separating nut (5) and is adapted to the first guide cone (11) to drive the separating nut (5) to separate radially.

4. The non-pyrotechnic separation nut rotation unlocking device for 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).

5. The non-pyrotechnic separation nut rotation unlocking device for a launch vehicle according to claim 1, characterized in that, Also includes: The first positioning ring (31) is formed at the upper end of the inner shell (3); The second positioning ring (41) is formed on the bottom surface of the pressure cover (4) and is inserted into the first positioning ring (31).

6. The non-pyrotechnic separation nut rotation unlocking device for a launch vehicle according to claim 1, characterized in that, The elastic pressure-applying component includes: The bottom surface of the pressure block (92) abuts against the upper end of the release nut (5); Spring (91), the two ends of which abut against the pressure cover (4) and the pressure block (92) respectively.

7. The non-pyrotechnic separation nut rotation unlocking device for a launch vehicle according to claim 6, characterized in that, The bottom surface of the pressure cover (4) is formed with a fixing post (42), which is inserted into the upper end of the spring (91); The surface of the pressure block (92) is formed with a groove (93), and the bottom end of the spring (91) is inserted into the groove (93).

8. The non-pyrotechnic separation nut rotation unlocking device for a launch vehicle according to claim 6, characterized in that, The bottom surface of the pressure block (92) is formed with a fourth guide cone surface (94). The upper end of the separating nut (5) is formed with a third guide cone surface (52), which is adapted to the fourth guide cone surface (94) to drive the separating nut (5) to separate radially.

9. The non-pyrotechnic separation nut rotation unlocking device for a launch vehicle according to claim 8, characterized in that, Multiple arc-shaped blocks (53) are formed on the third guide cone surface (52). When the internal thread of the separation nut (5) engages and clamps with the external thread of the locking bolt (6), the multiple arc-shaped blocks (53) abut against the outer wall of the pressure block (92).

10. The non-pyrotechnic separation nut rotation unlocking device for a launch vehicle according to claim 1, characterized in that, Also includes: Multiple sealing rings (32) are embedded in an annular groove on the outer side of the inner shell (3), and the multiple sealing rings (32) are in close contact with the inner wall of the shell (1).

Images