Impact reducing structure of firer device

Abstract

The invention relates to an impact reduction structure of an initiating explosive device, and belongs to the technical field of spacecraft impact protection. The base is of a hollow cone structure which is vertically placed; the pressed piece is coaxially placed on the upper surface of the top of the base. The initiating explosive device is coaxially arranged on the lower surface of the top of the base; a threaded gasket is arranged between the flange of the firer device and the lower surface of the top of the base; the installation screws are evenly distributed on a flange of the firer device in the circumferential direction, and the firer device is connected with the top of the base through the installation screws. A spherical groove is formed in the center of the upper surface of the pressed part; the spherical pad is embedded in the spherical groove; the locking nut is arranged on the horizontal upper surface of the spherical pad; the pressing rod is vertically arranged, and the pressing rod sequentially penetrates through the locking nut and the spherical pad from top to bottom and is in threaded connection with the hot working device; the internal structure of the pyrotechnic device is not changed, the connection rigidity is not weakened, and the problem that the unlocking impact response of the pyrotechnic device is too large is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of spacecraft impact protection and relates to an impact reduction structure of a pyrotechnic device. Background Art

[0002] Pyrotechnic devices are commonly used to achieve the compression and release of spacecraft cabins and various payload equipment. They are related to the success or failure of the entire mission. As a key product of the spacecraft, they must have highly reliable connection and release characteristics. When the pyrotechnic device is unlocked, the high-pressure gas generated by the explosion of gunpowder provides the unlocking power to achieve the unlocking and release function. However, due to factors such as the violent explosion of gunpowder and the instantaneous release of the preload, when the pyrotechnic device is unlocked, it generally causes a very large high-frequency shock response, and its amplitude can reach more than 10,000g near the shock source. Even if the transmission path attenuates through the spacecraft structural plate, it will still far exceed the tolerance of high-precision payload equipment such as space cameras, laser communication payloads and other electronic equipment, resulting in damage. The poor unlocking shock response seriously threatens the safety of precision electronic equipment and is a major technical bottleneck for high-precision equipment to successfully complete its work tasks. Summary of the invention

[0003] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to propose an impact reduction structure for an pyrotechnic device, without changing the internal structure of the pyrotechnic device or weakening the connection stiffness, and to solve the problem of excessive impact response when the pyrotechnic device is unlocked.

[0004] The solution of the present invention is:

[0005] A pyrotechnic device impact reduction structure, comprising a pressed part, a base, a pyrotechnic device, a pressing rod, a locking nut, a spherical pad, a mounting screw and a threaded washer;

[0006] Among them, the base is a vertically placed hollow cone structure; the compressed part is coaxially placed on the top upper surface of the base; the pyrotechnic device is coaxially arranged on the top lower surface of the base; a threaded washer is arranged between the flange of the pyrotechnic device and the top lower surface of the base; the mounting screws are evenly distributed on the lower surface of the flange of the pyrotechnic device along the circumference, and the pyrotechnic device is connected to the top of the base by the mounting screws; a spherical groove is arranged at the center of the upper surface of the compressed part; the spherical pad is embedded in the spherical groove; the locking nut is arranged on the horizontal upper surface of the spherical pad; the clamping rod is arranged vertically, and the clamping rod passes through the locking nut and the spherical pad from top to bottom in sequence, and docks with the pyrotechnic device.

[0007] In the above-mentioned impact reduction structure of a pyrotechnic device, a through hole is arranged at the top center of the base; the top end of the pyrotechnic device extends upward into the through hole of the base; the outer wall of the pyrotechnic device and the inner wall of the through hole of the base are clearance-matched; the bottom end of the clamping rod extends downward into the through hole of the base to achieve docking with the top end of the pyrotechnic device.

[0008] In the above-mentioned impact reduction structure of a pyrotechnic device, a gap is left between the nut of the mounting screw and the lower surface of the flange of the pyrotechnic device; the gap between the nut of the mounting screw and the flange of the pyrotechnic device forms a sliding pair, enabling the flange of the pyrotechnic device to slide downward along the gap.

[0009] In the above-mentioned impact reduction structure of a pyrotechnic device, the bottom end of the clamping rod is threadedly connected to the inner hole of the pyrotechnic device, and the threaded section at the top of the clamping rod is tightened with the locking nut; a pre-tightening force is applied to the clamping rod through the locking nut; under the action of the pre-tightening force, the clamped part is pressed onto the base through the locking nut and the spherical pad.

[0010] In the above-mentioned impact reduction structure of a pyrotechnic device, the mounting screw passes through the flange of the pyrotechnic device and the threaded washer from bottom to top in sequence and is screwed to the top of the base; the mounting screw is squeezed and fitted to the base through the threaded washer.

[0011] In the above-mentioned impact reduction structure of a pyrotechnic device, the inner hole of the threaded washer is a threaded hole; the threaded washer is sleeved on the threaded section of the mounting screw, and the threaded washer is positioned by the back cutter groove of the mounting screw.

[0012] In the above-mentioned impact reduction structure of a pyrotechnic device, the working process of the impact reduction structure is as follows:

[0013] After the pyrotechnic device is detonated, the connection with the clamping rod is released; the preload in the clamping rod is released instantly; the pyrotechnic device and the clamping rod move away from each other; the pyrotechnic device slides downward along the mounting screw and separates from the base; the unlocking impact energy is converted into kinetic energy of the pyrotechnic device and released, thereby preventing the unlocking impact energy from being transferred from the pyrotechnic device to the base, thereby reducing the impact.

[0014] A pyrotechnic device impact reduction structure, comprising a pressed part, a base, a pyrotechnic device, a pressing rod, a locking nut, a spherical pad, a mounting screw, two washers and an aluminum honeycomb;

[0015] The base is a vertically placed hollow cone structure; the compressed part is coaxially placed on the top upper surface of the base; the pyrotechnic device is coaxially arranged on the top lower surface of the base; the flange of the pyrotechnic device is in contact with the top lower surface of the base; the first gasket is mounted on the outer wall of the pyrotechnic device, and the first gasket is attached to the lower surface of the flange of the pyrotechnic device; the aluminum honeycomb is mounted on the outer wall of the pyrotechnic device and is located at the bottom of the first gasket; the second gasket is mounted on the outer wall of the pyrotechnic device, and the first gasket is attached At the bottom of the aluminum honeycomb; the mounting screws are evenly distributed on the lower surface of the second gasket along the circumferential direction, and the mounting screws pass through the second gasket, the aluminum honeycomb, the first gasket, and the flange of the pyrotechnic device from bottom to top, and are connected to the top of the base; a spherical groove is provided at the center of the upper surface of the clamped part; the spherical pad is embedded in the spherical groove; the locking nut is provided on the horizontal upper surface of the spherical pad; the clamping rod is vertically provided, and the clamping rod passes through the locking nut and the spherical pad from top to bottom in sequence, and is docked with the pyrotechnic device.

[0016] In the above-mentioned impact reduction structure of a pyrotechnic device, the flange of the pyrotechnic device can only be pressed on the base by the pre-tightening force of the clamping rod; the aluminum honeycomb undergoes plastic deformation after being compressed to absorb the impact energy.

[0017] In the above-mentioned impact reduction structure of a pyrotechnic device, the working process of the impact reduction structure is as follows:

[0018] After the pyrotechnic device is unlocked, driven by the energy released instantly by the explosion of gunpowder and the pre-tightening force, the pyrotechnic device slides downward along the axial direction of the mounting screw to squeeze the aluminum honeycomb. After being compressed, the aluminum honeycomb undergoes plastic deformation to absorb the impact energy, thereby achieving energy absorption and shock reduction.

[0019] The beneficial effects of the present invention compared with the prior art are:

[0020] (1) The present invention proposes a shock reduction design method based on the sliding of the pyrotechnic device and the conversion of impact energy into kinetic energy for release and absorption. The method does not change the internal structure of the pyrotechnic device, has no adverse effect on the unlocking performance and reliability of the pyrotechnic device, and has a significant shock reduction effect.

[0021] (2) The present invention installs the buffer pad and the pyrotechnic device on the cabin structure by fastening screws. The buffer pad is located outside the force transmission path between the pyrotechnic device and the spacecraft structure, and does not need to bear the pre-tightening force of the pyrotechnic device, and will not reduce the rigidity of the connection surface;

[0022] (3) The present invention only requires the flange hole of the pyrotechnic device to slide and cooperate with the mounting screw to achieve the unlocking and impact reduction effect of the pyrotechnic device. The pyrotechnic device can be applied as long as it has an external flange, which is easy to implement and has strong versatility.

[0023] (4) The present invention adopts a pneumatic unlocking method to verify the impact reduction effect, accurately simulates the response conditions of the release of the preload force of the clamping rod, has good frequency domain and response amplitude simulation effects, the pressure required for the pneumatic unlocking of the pyrotechnic device is stable, the consistency of multiple pneumatic unlocking is good, the cost is low, and it is easy to carry out repetitive verification work. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the impact reduction structure of the pyrotechnic device without a buffer pad of the present invention;

[0025] Figure 2 It is a schematic diagram of the unlocked state of the impact reduction structure of the pyrotechnic device without a buffer pad of the present invention;

[0026] Figure 3 It is a schematic diagram of the impact reduction structure of the pyrotechnic device with a buffer pad of the present invention;

[0027] Figure 4 It is a schematic diagram of the unlocked state of the impact reduction structure of the pyrotechnic device with a buffer pad of the present invention;

[0028] Figure 5 It is a schematic diagram of the impact reduction test system of the pyrotechnic device of the present invention;

[0029] Figure 6 This is a diagram showing the impact reduction effect of the pyrotechnic device with a buffer pad according to the present invention. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the embodiments.

[0031] The present invention provides an impact reduction structure for a pyrotechnic device, which is a shock reduction design method based on the sliding of the pyrotechnic device and converting the impact energy into kinetic energy for release and absorption. The internal structure of the pyrotechnic device is not changed, and there is no adverse effect on the unlocking performance and reliability of the pyrotechnic device, and the impact reduction effect is significant.

[0032] Explosive device impact reduction structure, such as Figure 1As shown, it specifically includes a compressed part 1, a base 2, a pyrotechnic device 3, a clamping rod 4, a locking nut 5, a spherical pad 6, a mounting screw 7 and a threaded washer 8. Among them, the base 2 is a vertically placed hollow cone structure; the compressed part 1 is coaxially placed on the top upper surface of the base 2; the pyrotechnic device 3 is coaxially arranged on the top lower surface of the base 2; a threaded washer 8 is arranged between the flange of the pyrotechnic device 3 and the top lower surface of the base 2; the mounting screws 7 are evenly distributed on the lower surface of the flange of the pyrotechnic device 3 along the circumferential direction, and the pyrotechnic device 3 is connected to the top of the base 2 by the mounting screws 7; a spherical groove is arranged at the center of the upper surface of the compressed part 1; the spherical pad 6 is embedded in the spherical groove; the locking nut 5 is arranged on the horizontal upper surface of the spherical pad 6; the clamping rod 4 is arranged vertically, and the clamping rod 4 passes through the locking nut 5 and the spherical pad 6 from top to bottom in sequence, and docks with the pyrotechnic device 3.

[0033] A through hole is provided at the top center of the base 2; the top end of the pyrotechnic device 3 extends upward into the through hole of the base 2; the outer wall of the pyrotechnic device 3 and the inner wall of the through hole of the base 2 are clearance-matched; the bottom end of the clamping rod 4 extends downward into the through hole of the base 2 to achieve docking with the top end of the pyrotechnic device 3.

[0034] There is a gap between the nut of the mounting screw 7 and the lower surface of the flange of the pyrotechnic device 3; the gap between the nut of the mounting screw 7 and the flange of the pyrotechnic device 3 forms a sliding pair, enabling the flange of the pyrotechnic device 3 to slide downward along the gap.

[0035] The bottom end of the clamping rod 4 is threadedly connected to the inner hole of the pyrotechnic device 3, and the threaded section at the top end of the clamping rod 4 is tightened with the locking nut 5; a pre-tightening force is applied to the clamping rod 4 through the locking nut 5; under the action of the pre-tightening force, the clamped part 1 is pressed onto the base 2 through the locking nut 5 and the spherical pad 6.

[0036] The mounting screw 7 passes through the flange and threaded washer 8 of the pyrotechnic device 3 from bottom to top, and is screwed to the top of the base 2 ; the mounting screw 7 is squeezed and fitted to the base 2 through the threaded washer 8 .

[0037] The inner hole of the threaded washer 8 is a threaded hole; the threaded washer 8 is sleeved on the screw of the mounting screw 7.

[0038] The working process of the impact reduction structure is:

[0039] After the pyrotechnic device 3 is detonated, the connection with the clamping rod 4 is released; the preload in the clamping rod 4 is released instantly; the pyrotechnic device 3 and the clamping rod 4 move away from each other; the pyrotechnic device 3 slides downward along the mounting screw 7 and separates from the base 2, as shown in FIG. Figure 2 The unlocking impact energy is converted into the kinetic energy of the pyrotechnic device 3 for release, so as to prevent the unlocking impact energy from being transmitted from the pyrotechnic device 3 to the base 2, thereby playing the role of reducing the impact.

[0040] The center of the top of the base 2 is a through hole, and the outer circle of the pyrotechnic device 3 is a clearance fit with the through hole. One end of the clamping rod 4 is threadedly connected to the inner hole of the pyrotechnic device 3, and the threaded section of the other end is tightened with the locking nut 5. The locking nut 5 can apply a pre-tightening force to the clamping rod 4, and under the action of the pre-tightening force, the clamped part 1 is tightened and pressed on the base 2 through the locking nut 5 and the spherical pad 6. The flange of the pyrotechnic device 3 fits tightly with the base 2. Several mounting screws 7 pass through the through holes and threaded washers 8 on the flange of the pyrotechnic device 3 in turn and are connected to the base 2. The inner hole of the threaded washer 8 is a threaded hole, which is installed on the threaded section of the mounting screw 7, and the threaded washer 8 is positioned by the backing groove of the mounting screw 7. The mounting screw 7 and the flange of the pyrotechnic device 3 form a sliding pair, and the flange of the pyrotechnic device 3 can slide along the mounting screw 7. The mounting screw 7 is squeezed and fitted with the base 2 through the threaded washer 8. As an existing mature technology product, the pyrotechnic device 3 can release the connection with the clamping rod 4 about 10ms after the internal gunpowder is detonated. At this time, the preload in the clamping rod 4 is released instantly. Based on the principle of conservation of momentum, the pyrotechnic device 3 and the clamping rod 4 tend to separate from each other at the moment of unlocking. Then the pyrotechnic device 3 slides downward along the mounting screw 7 and separates from the base 2. The unlocking impact energy is converted into the kinetic energy release of the pyrotechnic device 3, avoiding the transmission of the unlocking impact energy from the pyrotechnic device 3 to the base 2, thereby playing a role in reducing the impact. Figure 2 The figure shows the unlocked state.

[0041] In the above-mentioned installation method of the pyrotechnic device 3, the mounting screws 7 do not exert a squeezing force on the flange of the pyrotechnic device 3. Therefore, the flange of the pyrotechnic device 3 can only be pressed on the base 2 by the pre-tightening force of the clamping rod 4, which is suitable for application scenarios where the pre-tightening force margin of the clamping rod 4 is relatively large. Furthermore, a buffer pad can be installed at the flange of the pyrotechnic device 3, which can absorb energy and reduce shock, and enable the mounting screws 7 to exert sufficient squeezing force on the pyrotechnic device 3.

[0042] Another pyrotechnic device impact reduction structure, such as Figure 3As shown, it specifically includes a compressed part 1, a base 2, a pyrotechnic device 3, a compression rod 4, a locking nut 5, a spherical pad 6, a mounting screw 7, two gaskets 9 and an aluminum honeycomb 10. Among them, the base 2 is a vertically placed hollow cone structure; the compressed part 1 is coaxially placed on the top upper surface of the base 2; the pyrotechnic device 3 is coaxially arranged on the top lower surface of the base 2; the flange of the pyrotechnic device 3 is in contact with the top lower surface of the base 2; the first gasket 9 is sleeved on the outer wall of the pyrotechnic device 3, and the first gasket 9 is attached to the lower surface of the flange of the pyrotechnic device 3; the aluminum honeycomb 10 is sleeved on the outer wall of the pyrotechnic device 3, and is located at the bottom of the first gasket 9; the second gasket 9 is sleeved on the outer wall of the pyrotechnic device 3, and the first gasket 9 is attached to The bottom of the aluminum honeycomb 10; the mounting screws 7 are evenly distributed on the lower surface of the second gasket 9 along the circumferential direction, and the mounting screws 7 pass through the second gasket 9, the aluminum honeycomb 10, the first gasket 9, and the flange of the pyrotechnic device 3 from bottom to top, and are connected to the top of the base 2; a spherical groove is provided at the center of the upper surface of the clamped part 1; the spherical pad 6 is embedded in the spherical groove; the locking nut 5 is provided on the horizontal upper surface of the spherical pad 6; the clamping rod 4 is vertically arranged, and the clamping rod 4 passes through the locking nut 5 and the spherical pad 6 from top to bottom in turn, and is connected to the pyrotechnic device 3.

[0043] like Figure 3 As shown, the buffer pad is composed of upper and lower gaskets 9 and an aluminum honeycomb 10 in the middle. The upper and lower gaskets 9 of the buffer pad clamp the aluminum honeycomb 10 inside. There are several through holes on the buffer pad for inserting the mounting screws 7. The aluminum honeycomb 10 can undergo plastic deformation after being compressed to absorb impact energy. The aluminum honeycomb 10 needs to have sufficient bearing capacity and energy absorption margin. The mounting screws 7 first pass through the buffer pad and then through the flange of the pyrotechnic device 3, and are fastened to the threaded holes of the base 2, so that the buffer pad and the pyrotechnic device 3 are pressed together to the base 2. The buffer pad only needs to bear the tightening force of the mounting screws 7, and does not bear the preload between the pyrotechnic device 3 and the base 2. The pyrotechnic device 3 is still tightly connected to the structure of the base 2, and the two are in direct contact.

[0044] The flange of the pyrotechnic device 3 can only be pressed on the base 2 by the pre-tightening force of the pressing rod 4; the aluminum honeycomb 10 undergoes plastic deformation after being pressed to absorb the impact energy.

[0045] The working process of the impact reduction structure is:

[0046] After the pyrotechnic device 3 is unlocked, driven by the energy released by the explosive detonation and the instantaneous preload, the pyrotechnic device 3 slides downward along the mounting screw 7 to squeeze the aluminum honeycomb 10. The aluminum honeycomb 10 undergoes plastic deformation under pressure to absorb the impact energy, thus achieving energy absorption and shock reduction. Figure 4 shown.

[0047] like Figure 5As shown, the test system consists of a simulation wall, a data measurement system, and a gas source pipeline system. Before the test, the pyrotechnic device 3 of the test piece to be tested is removed and replaced with a pyrotechnic simulation piece. The pyrotechnic simulation piece is obtained by modifying the real pyrotechnic device 3. The only difference is that it does not contain the detonating gunpowder part of the real pyrotechnic device 3. The rest of the composition and structure are completely the same. The pyrotechnic simulation piece can be unlocked by high-pressure gas. Pneumatic unlocking is a mature technology. The data measurement system includes an impact sensor and a data acquisition device. The gas source pipeline system includes a high-pressure gas source, a control valve, and a pipeline. The high-pressure gas source provides the high-pressure gas required for the test, which is transported to the pyrotechnic simulation piece through the pipeline and valve. Before the test, the clamping rod 4 is connected to the pyrotechnic simulation piece, and the preload force is applied as required. The test piece is installed behind the simulation wall, and the impact sensor is attached to the concerned part, and connected to the data acquisition equipment for signal acquisition and processing. The impact sensor should be arranged near and far-field of the test piece, respectively, to synchronously measure and compare the unlocking impact data of the near field and far field. The pipeline is sealed and connected to the pyrotechnic simulation piece. After the test begins, the air pressure delivered to the pyrotechnic simulation is gradually increased by adjusting the control valve. When the air pressure reaches a level sufficient to overcome the unlocking resistance inside the pyrotechnic simulation, the unlocking can be achieved and the clamping rod 4 can be released instantly, thereby truly simulating the impact environment of preload release. The impact spectrum and amplitude are consistent with the pyrotechnic impact. After each pneumatic unlocking, the pyrotechnic simulation can be manually reset, and repeatable verification can be carried out again.

[0048] like Figure 6 The figure shows the impact reduction effect of a pyrotechnic device with a cushion, where the black part is the impact response envelope curve without cushioning measures (peak value 4588g / 3350Hz), and the red part is the impact response envelope curve with cushioning aluminum honeycomb (peak value 1428g / 3758Hz). For the high-frequency impact response above 1000Hz that is sensitive to precision equipment, the impact reduction method has a significant attenuation effect, with the peak value reduced by about 60%.

[0049] The present invention proposes a shock reduction design method based on the sliding of the pyrotechnic device and converting the impact energy into kinetic energy for release and absorption. The method does not change the internal structure of the pyrotechnic device, has no adverse effect on the unlocking performance and reliability of the pyrotechnic device, and has a significant shock reduction effect.

[0050] The present invention installs the buffer pad and the pyrotechnic device on the cabin structure by fastening screws. The buffer pad is located outside the force transmission path between the pyrotechnic device and the spacecraft structure, does not need to bear the pre-tightening force of the pyrotechnic device, and will not reduce the rigidity of the connection surface.

[0051] The present invention only requires the pyrotechnic device flange hole and the mounting screw to slide and cooperate, so as to achieve the unlocking and impact reduction effect of the pyrotechnic device. The pyrotechnic device can be applied as long as it has an external flange, is easy to implement, and has strong versatility.

[0052] The present invention adopts a pneumatic unlocking method to verify the impact reduction effect and accurately simulates the response conditions of the release of the preload force of the clamping rod. The frequency domain and response amplitude simulation effects are good. The pressure required for the pneumatic unlocking of the pyrotechnic device is stable. The consistency of multiple pneumatic unlocking is good. The cost is low and it is easy to carry out repeated verification work.

[0053] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A shock reduction structure for an explosive device, characterized in that: It comprises a pressed part (1), a base (2), a pyrotechnic device (3), a pressing rod (4), a locking nut (5), a spherical pad (6), a mounting screw (7) and a threaded washer (8); The base (2) is a hollow cone structure placed vertically; the compressed part (1) is coaxially placed on the top upper surface of the base (2); the pyrotechnic device (3) is coaxially arranged on the top lower surface of the base (2); a threaded washer (8) is arranged between the flange of the pyrotechnic device (3) and the top lower surface of the base (2); the mounting screws (7) are evenly distributed on the lower surface of the flange of the pyrotechnic device (3) along the circumferential direction, and the pyrotechnic device (3) is connected to the top of the base (2) by the mounting screws (7); a spherical groove is arranged at the center of the upper surface of the compressed part (1); the spherical pad (6) is embedded in the spherical groove; the locking nut (5) is arranged on the horizontal upper surface of the spherical pad (6); the clamping rod (4) is arranged vertically, and the clamping rod (4) passes through the locking nut (5) and the spherical pad (6) from top to bottom in sequence to dock with the pyrotechnic device (3).

2. The impact reduction structure of an explosive device according to claim 1, characterized in that: A through hole is provided at the center of the top of the base (2); the top end of the pyrotechnic device (3) extends upward into the through hole of the base (2); the outer wall of the pyrotechnic device (3) and the inner wall of the through hole of the base (2) are clearance-matched; the bottom end of the clamping rod (4) extends downward into the through hole of the base (2) to achieve docking with the top end of the pyrotechnic device (3).

3. The impact reduction structure of an explosive device according to claim 1, characterized in that: A gap is left between the nut of the mounting screw (7) and the lower surface of the flange of the pyrotechnic device (3); the gap between the nut of the mounting screw (7) and the flange of the pyrotechnic device (3) forms a sliding pair, which enables the flange of the pyrotechnic device (3) to slide downward along the gap.

4. The impact reduction structure of an explosive device according to claim 1, characterized in that: The bottom end of the clamping rod (4) is threadedly connected to the inner hole of the pyrotechnic device (3), and the threaded section at the top end of the clamping rod (4) is screwed to the locking nut (5); a pre-tightening force is applied to the clamping rod (4) through the locking nut (5); under the action of the pre-tightening force, the clamped part (1) is pressed onto the base (2) through the locking nut (5) and the spherical pad (6).

5. The impact reduction structure of an explosive device according to claim 1, characterized in that: The mounting screw (7) passes through the flange and threaded washer (8) of the pyrotechnic device (3) from bottom to top, and is screwed to the top of the base (2); the mounting screw (7) is pressed and fitted to the base (2) through the threaded washer (8).

6. The impact reduction structure of an explosive device according to claim 5, characterized in that: The inner hole of the threaded washer (8) is a threaded hole; the threaded washer (8) is sleeved on the threaded section of the mounting screw (7), and the threaded washer (8) is positioned by the back cutter groove of the mounting screw (7).

7. The impact reduction structure of an explosive device according to claim 3, characterized in that: The working process of the impact reduction structure is: After the pyrotechnic device (3) is detonated, the connection with the clamping rod (4) is released; the pre-tightening force in the clamping rod (4) is released instantly; the pyrotechnic device (3) and the clamping rod (4) move to separate from each other; the pyrotechnic device (3) slides downward along the mounting screw (7) and separates from the base (2); the unlocking impact energy is converted into kinetic energy of the pyrotechnic device (3) and released, thereby preventing the unlocking impact energy from being transmitted from the pyrotechnic device (3) to the base (2), thereby playing a role in reducing the impact.

8. A shock reduction structure for an explosive device, characterized in that: It comprises a pressed part (1), a base (2), a pyrotechnic device (3), a pressing rod (4), a locking nut (5), a spherical pad (6), a mounting screw (7), two washers (9) and an aluminum honeycomb (10); The base (2) is a vertically placed hollow cone structure; the compressed part (1) is coaxially placed on the top upper surface of the base (2); the pyrotechnic device (3) is coaxially arranged on the top lower surface of the base (2); the flange of the pyrotechnic device (3) is in contact with the top lower surface of the base (2); the first gasket (9) is mounted on the outer wall of the pyrotechnic device (3), and the first gasket (9) is attached to the lower surface of the flange of the pyrotechnic device (3); the aluminum honeycomb (10) is mounted on the outer wall of the pyrotechnic device (3) and is located at the bottom of the first gasket (9); the second gasket (9) is mounted on the outer wall of the pyrotechnic device (3), and the first gasket (9) is attached to the aluminum honeycomb (10); The bottom of the honeycomb (10); the mounting screws (7) are evenly distributed on the lower surface of the second gasket (9) along the circumferential direction, and the mounting screws (7) pass through the second gasket (9), the aluminum honeycomb (10), the first gasket (9), and the flange of the pyrotechnic device (3) from bottom to top, and are connected to the top of the base (2); a spherical groove is provided at the center of the upper surface of the pressed part (1); the spherical gasket (6) is embedded in the spherical groove; the locking nut (5) is provided on the horizontal upper surface of the spherical gasket (6); the pressing rod (4) is vertically arranged, and the pressing rod (4) passes through the locking nut (5) and the spherical gasket (6) from top to bottom in sequence, and is connected to the pyrotechnic device (3).

9. The impact reduction structure of an explosive device according to claim 8, characterized in that: The flange of the pyrotechnic device (3) can only be pressed onto the base (2) by the pre-tightening force of the pressing rod (4); the aluminum honeycomb (10) undergoes plastic deformation after being pressed to absorb the impact energy.

10. The impact reduction structure of an explosive device according to claim 9, characterized in that: The working process of the impact reduction structure is: After the pyrotechnic device (3) is unlocked, driven by the energy of the explosive detonation and the instantaneous release of the pre-tightening force, the pyrotechnic device (3) slides downward along the axial direction of the mounting screw (7) to extrude the aluminum honeycomb (10), and the aluminum honeycomb (10) undergoes plastic deformation after being compressed to absorb the impact energy, thereby achieving energy absorption and shock reduction.

Images