Tension-shear combined quick-response pressure relief device and control method thereof

Abstract

The invention belongs to the technical field of impact tests, and discloses a tension-shear combined quick-response pressure relief device which comprises an ultrahigh-pressure gas generator, a shear ring, an emitter and an emission cylinder. One end of the pull rod is connected to the tail end of the emitter, the other end of the pull rod penetrates through the end face, away from the emitter, of the ultrahigh pressure gas generator and is connected with the pneumatic tension regulator, and a force measuring device is arranged on the pull rod and used for detecting the real-time working tension of the pull rod. The pneumatic tension regulator controls the working tension of the pull rod to be smaller than the ultimate breaking force of the pull rod all the time through differential pressure regulation; the working tension of the pull rod is larger than the difference between the limit shearing force upper limit and the limit shearing force lower limit of the shearing ring, the shearing ring and the pull rod jointly act on the emitter, and movement of the emitter is limited before the emitter is emitted. The invention further provides a control method. The device and the method are suitable for ultrahigh-pressure and ultrahigh-speed acceleration and can accurately control the pressure release process so as to accurately control the launching process.

Description

Technical Field

[0001] The invention belongs to the technical field of impact testing, and in particular relates to a tension-shear combination fast-response pressure-releasing device and a control method thereof. Background Art

[0002] High overload test is an important means to study the adaptability of D guns and the characteristics of D-track linkage. The actual D launch technology uses the instantaneous energy release of pyrotechnics and propellants to generate high-pressure airflow in the barrel or gun barrel to accelerate the D body and make it move at high speed, so as to achieve the required exit speed. This technology has the advantages of high reliability and direct effectiveness, but it has the disadvantages of high experimental cost, limited experimental environment, and the need for pyrotechnic qualifications. There are two types of test devices for high-speed impact tests: one is to use equipment based on pyrotechnics such as ballistic guns, which has high test efficiency, but because pyrotechnics are controlled products, they cannot be widely promoted and applied; the other is to use a multi-stage air cannon system for high-speed impact tests, and the high-pressure gas drives the acceleration of the impact test projectile. The acceleration speed of the impact test projectile can reach more than 700m / s; among them, the quick release device is one of the key components of the high-speed impact test. The use effect of the quick release valve directly determines the success rate of the high-speed impact test. However, the existing quick release device has a complex structure and the control effect is not ideal. Under ultra-high pressure conditions, the valve opening quick release device has very high requirements for valve body strength and control accuracy. At present, the flow diameter of ultra-high pressure valves is generally small, and the response time is long, which makes it difficult to meet the requirements of large-diameter and large-mass ejection impact tests. Diaphragm-type quick release devices generally work with valves, and also have technical problems such as instantaneous control, large mass flow (the diaphragm is difficult to fully open), and reliable sealing. Summary of the invention

[0003] In order to overcome the deficiencies and defects mentioned in the above background technology, the present invention provides a tension-shear combination fast response pressure release device suitable for ultra-high acceleration and capable of accurately controlling the pressure release process and a control method thereof. In order to solve the above technical problems, the technical solution proposed by the present invention is:

[0004] A pull-shear combination fast response pressure relief device, comprising an ultra-high pressure gas generator, a projectile and a launch tube, wherein a shear ring is arranged between the ultra-high pressure gas generator and the projectile; and further comprising:

[0005] A pull rod, one end of which is connected to the tail end of the projectile, and the other end of which passes through the end face of the ultra-high pressure gas generator away from the projectile through a dynamic seal, and is connected to a pneumatic tension regulator. A force measuring device is provided on the pull rod for detecting and monitoring the real-time working tension of the pull rod. The pneumatic tension regulator controls the working tension of the pull rod by pressure difference adjustment to always be less than the ultimate breaking force of the pull rod; and the working tension of the pull rod is greater than the difference between the ultimate shearing force upper limit and the ultimate shearing force lower limit of the shear ring. The shear ring and the pull rod act together on the projectile to limit the movement of the projectile before the projectile is launched;

[0006] During the pressurization process of the ultra-high pressure gas generator, when the pressure of the ultra-high pressure gas generator increases to a level greater than the upper limit of the shear force of the shear ring, the pneumatic tension regulator unloads the working tension of the pull rod on the projectile through air pressure control, the shear ring is quickly damaged, and the pull rod breaks quickly, and the gas of the ultra-high pressure gas generator is quickly released, pushing the projectile to accelerate in the launch tube.

[0007] In one embodiment, the pneumatic tension regulator includes: a pneumatic cylinder, a first piston is arranged in the pneumatic cylinder, the first piston is connected to a pull rod, a pressure relief pipe and an air charging pipe are connected to the wall of the cavity of the pneumatic cylinder located on the side of the first piston close to the pull rod, a control valve is arranged on the pressure relief pipe, and an accumulator is connected to the wall of the cavity of the pneumatic cylinder located on the side of the first piston away from the pull rod, and a second piston is arranged in the accumulator.

[0008] In one embodiment, the pneumatic cylinder is detachably connected to an end flange of the ultra-high pressure gas generator.

[0009] In one embodiment, one end of the pull rod is inserted into a bolt hole in the launch body to form a fastening connection, and the other end passes through the end flange of the ultra-high pressure gas generator to be connected to the first piston of the pneumatic tension regulator.

[0010] In one embodiment, a weakening groove is provided on the pull rod, a shear weakening groove is provided on the shear ring, and the working tension of the pull rod is greater than twice the difference between the upper limit shearing force and the lower limit shearing force of the shear ring.

[0011] In one embodiment, the pneumatic cylinder includes a pneumatic part and a hydraulic part. The pneumatic part is located on the side of the first piston close to the pull rod, and the hydraulic part is located on the side of the first piston away from the pull rod. The accumulator is divided into a hydraulic chamber and a pneumatic energy storage chamber by the second piston, and the hydraulic chamber is connected to the hydraulic part.

[0012] In one embodiment, a heating tube is provided in the ultra-high pressure gas generator for heating the gas source in the ultra-high pressure gas generator, and an injection tube is provided at the end of the ultra-high pressure gas generator for adding the gas source medium.

[0013] In one embodiment, the gas source medium is solid CO2 or liquid CO2, and the heating tube is an electric heating tube, which converts the solid CO2 or liquid CO2 into supercritical CO2 by constant volume, temperature and pressure increase through electric heating.

[0014] Based on the same inventive concept, a control method for the tension-shear combination fast response pressure release device as described above is also provided, comprising:

[0015] Adding gas source medium to the ultra-high pressure gas generator;

[0016] The pneumatic tension regulator enables the pull rod to provide working tension for the projectile, and together with the shear ring, limits the movement of the projectile;

[0017] The pressure of the ultra-high pressure gas generator is increased to a level greater than the upper limit of the ultimate shear force of the shear ring;

[0018] The pneumatic tension regulator controls the pull rod to unload the working tension acting on the projectile;

[0019] The gas from the ultra-high pressure gas generator quickly destroys the shear ring and the pull rod is quickly broken, thereby pushing the projectile to accelerate in the launch tube.

[0020] In one embodiment, it comprises:

[0021] Pre-filling the pneumatic cylinder with high-pressure gas pushes the first piston to move leftward so that the pull rod bears a working tension, the magnitude of which is determined by the pressure difference at both ends of the first piston; changing the pressure difference at both ends of the first piston so as to control the working tension in the pull rod to always be less than the ultimate breaking force of the pull rod;

[0022] After the pressure of the ultra-high pressure gas generator is increased to a level greater than the upper limit of the shear force of the shear ring, the control valve is opened. The compressed air in the accumulator pushes the second piston to move in the opposite direction, thereby pushing the first piston back to the right. The working tension on the pull rod is unloaded, that is, the working tension is zero. After the shear ring is quickly destroyed, the pull rod is quickly broken, thereby pushing the projectile to accelerate in the launch tube.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: in the prior art, the controlled launch is achieved by destroying the shear ring by high pressure pressure, and compared with the gunpowder launch method, there is no pyrotechnics, no residue after launch, and basically clean launch is achieved. The launch body in the form of a shear ring is simpler to achieve static sealing under ultra-high pressure conditions, and the gas flow area is large, which makes the acceleration overload of the launch body larger. Since the higher the launch high pressure of the ultra-high pressure gas generator, the higher the requirements for the device, and the greater the operating danger, the design launch high pressure is generally slightly greater than the limit pressure of the shear ring. However, due to the limitations of the shear ring material and processing accuracy, the shear force of the shear ring always has a certain amplitude deviation, such as the difference between the upper limit pressure of the shear ring and the lower limit pressure of the shear ring, which is about 10MPa (for example, it may actually be other numerical deviations), resulting in the theoretical design of the launch high pressure of the ultra-high pressure gas generator and the shear force of the shear ring are not one-to-one corresponding, and the launch time cannot be accurately controlled.

[0024] In the pull-shear combination quick response pressure release device and method of the present application, a shear ring is arranged between the ultra-high pressure gas generator and the projectile; one end of the pull rod is connected to the tail end of the projectile, and the other end passes through the end face of the ultra-high pressure gas generator away from the projectile; and is connected to the pneumatic tension regulator, and a force measuring device is arranged on the pull rod to detect the real-time working tension of the pull rod; the working tension of the pull rod is greater than the pressure difference between the upper limit of the ultimate shear force and the lower limit of the ultimate shear force of the shear ring, and the shear ring and the pull rod act together on the projectile to limit the movement of the projectile before the projectile is launched. During the pressure increase process of the ultra-high pressure gas generator, the pneumatic tension regulator controls the pull rod to share the pressure of the shear ring. When the pressure of the ultra-high pressure gas generator increases to a value greater than the upper limit of the ultimate shear force of the shear ring, the pneumatic tension regulator unloads the air pressure so that the pull rod cannot share the pressure of the shear ring, and the shear ring breaks quickly along the annular shear groove. At this time, the pull rod at the tail of the projectile that is carried alone is also quickly pulled off, and the gas of the ultra-high pressure gas generator is quickly released, pushing the projectile to accelerate in the launch tube. By flexibly controlling the pull rod, precise control of the projectile can be achieved. By using the device and method of the present application, the launch time of the projectile can be controlled within a time range of several milliseconds to tens of milliseconds, and the device and method of the present application can be applied in experimental conditions where the projectile has an ultra-high acceleration of 20,000 g and an ultra-high pressure of 250 MPa. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic structural diagram of a tension-shear combination fast-response pressure-releasing device according to one embodiment. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and meticulously below in conjunction with the accompanying drawings and preferred embodiments of the present invention, but the protection scope of the present invention is not limited to the following specific embodiments.

[0028] Unless otherwise defined, all professional terms used below have the same meanings as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention.

[0029] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0030] See also Figure 1 A tension-shear combination fast response pressure relief device comprises an ultra-high pressure gas generator 1, a projectile 2, a launch tube 3, a shear ring 4, a pull rod 5 and a pneumatic tension regulator 6. The ultra-high pressure gas generator 1 and the launch tube 3 are sealed and connected, the projectile 2 is arranged at one end of the launch tube 3 close to the ultra-high pressure gas generator 1, and the shear ring 4 is arranged between the ultra-high pressure gas generator 1 and the projectile 2. One end of the pull rod 5 is connected to the tail end of the projectile 2, and the other end passes through the end face of the ultra-high pressure gas generator 1 away from the projectile 2 through a dynamic seal, and is connected to the pneumatic tension regulator 6. A force measuring device is provided on the pull rod 5 for detecting and monitoring the real-time working tension of the pull rod 5. The pneumatic tension regulator 6 controls the working tension of the pull rod 5 to be less than the ultimate breaking force of the pull rod 5 through pressure difference adjustment; and the working tension of the pull rod 5 is greater than the difference between the ultimate shearing force upper limit and the ultimate shearing force lower limit of the shear ring 4. The shear ring 4 and the pull rod 5 act together on the projectile to limit the movement of the projectile 2 before the projectile 2 is launched; the ultra-high pressure gas generator 1 is used to detect and monitor the real-time working tension of the pull rod 5. The pneumatic tension regulator 6 controls the working tension of the pull rod 5 to be less than the ultimate breaking force of the pull rod 5 through pressure difference adjustment; and the working tension of the pull rod 5 is greater than the difference between the ultimate shearing force upper limit and the ultimate shearing force lower limit of the shear ring 4. The shear ring 4 and the pull rod 5 act on the projectile together to limit the movement of the projectile 2 before the projectile 2 is launched; During the pressurization process of the generator 1, when the pressure of the ultra-high pressure gas generator 1 increases to a level greater than the upper limit of the ultimate shear force of the shear ring 4, the pneumatic tension regulator 6 unloads the air pressure so that the working tension of the pull rod 5 is zero. At this time, part of the pressure originally shared by the pull rod 5 for the shear ring 4 acts on the shear ring 4. The pressure of the ultra-high pressure gas generator 1 is greater than the upper limit of the ultimate shear force of the shear ring 4 at this time, so the shear ring 4 is quickly damaged. When the shear ring 4 is damaged, the pull rod 5 will also break quickly under the action of the pressure of the ultra-high pressure gas generator 1, and the gas of the ultra-high pressure gas generator 1 is quickly released, pushing the launch body 2 to accelerate in the launch tube 3.

[0031] Among them, the shear force of the shear ring 4 always has a certain amplitude deviation, such as the difference between the upper and lower limits of the ultimate pressure bearing of the shear ring 4 is about 10MPa (for example, it may actually be other numerical deviations), resulting in the theoretical design of the ultra-high pressure gas generator's launch high pressure gas pressure and the ultimate shear force (area*pressure) of the shear ring 4 are not one-to-one corresponding, so the shear ring 4 corresponds to the upper and lower limits of the ultimate pressure bearing, and the shear ring 4 has an upper and lower limit of the ultimate shear force. The ultimate breaking force of the tie rod 5 is determined according to its material properties and structure, and has a known value.

[0032] The pull-shear combination fast response pressure release device and method of the present application can realize precise control of the projectile 2 through flexible control of the pull rod 5. The device and method of the present application can control the launch time of the projectile 2 within a time range of several milliseconds to tens of milliseconds, and the device and method of the present application can be applied to experimental conditions where the projectile has an ultra-high acceleration of 20,000g and an ultra-high pressure of 250 MPa. The fast in the present application refers to the corresponding action occurring within a time range of several milliseconds to tens of milliseconds.

[0033] Preferably, in one embodiment, the working tension of the pull rod 5 is greater than twice the difference between the upper limit of the ultimate shear force and the lower limit of the ultimate shear force of the shear ring 4, ensuring that when the pressure of the ultra-high pressure gas generator 1 increases to a level greater than the upper limit of the ultimate shear force of the shear ring 4, the projectile 2 can be restricted from moving through the supplementary effect of the pull rod 5, and when the working tension of the pull rod 5 is unloaded, the projectile 2 can be quickly launched.

[0034] Specifically, in one embodiment, the pneumatic tension regulator 6 includes: a pneumatic cylinder 60, a first piston 62 is provided in the pneumatic cylinder 60, the bottom of the first piston 62 is connected to the pull rod 5, and the wall surface of the pneumatic cylinder 60 located above the first piston 62 is connected to a pressure relief pipe and an air charging pipe for injecting high-pressure gas. A control valve 64 is provided on the pressure relief pipe, and an accumulator 65 is connected to the wall surface of the pneumatic cylinder 60 located below the first piston 62, and a second piston 66 is provided in the accumulator 65. More specifically, a piston rod 620 is provided on the first piston 62, and the piston rod 620 is fixedly connected to the pull rod 5.

[0035] Specifically, in one embodiment, the pneumatic cylinder 60 includes a pneumatic part 621 and a hydraulic part 622. The space above the first piston 62 of the pneumatic cylinder 60 is the pneumatic part 621, and the pressure relief pipe and the gas charging pipe are arranged on the wall of the pneumatic part 621. The space below the first piston 62 of the pneumatic cylinder 60 is the hydraulic part 622. The accumulator 65 is divided into a hydraulic chamber 660 and a pneumatic energy storage chamber 662 by the second piston 66, and the hydraulic chamber 660 is connected to the hydraulic part 622. The hydraulic part 622 and the hydraulic chamber 660 of the pneumatic cylinder 60 and the accumulator 65 are in hydraulic form, which can reduce the structural sealing requirements.

[0036] The working tension of the pull rod 5 is determined by the pneumatic tension regulator 6. Specifically, the working tension of the pull rod 5 is determined by the pressure difference on both sides of the first piston 62. In the initial state, the pneumatic cylinder 60 is pushed by the compressed air pressure of the air pressure storage chamber 662 of the accumulator 65, and the first piston 62 moves toward the projectile 2. At this time, the working tension of the pull rod 5 is zero. The air pressure part 621 is filled with high-pressure gas, the first piston 62 moves in the opposite direction, and the pull rod 5 is subjected to the working tension, which is the product of the pressure difference and the area at both ends of the first piston 62. Controlling the pressure difference allows the working tension of the pull rod 5 to share the impact force generated by the gas of the ultra-high pressure gas generator 1 for the shear ring 4, without breaking it (less than the ultimate breaking force of the pull rod 5). The real-time working tension of the pull rod 5 is read by the force measuring device on the pull rod 5, and the real-time working tension can be adjusted by controlling the amount of gas filled in the air pressure part 621 to meet the above requirements. The force measuring device may be a strain gauge, or may be other force measuring devices capable of measuring working tension.

[0037] Specifically, in one embodiment, one end of the pull rod 5 is inserted into the launch body 2 to form a fastening connection, for example, it can be fixed in the launch body by means of threads, slots, etc., and the other end passes through the end flange 12 of the ultra-high pressure gas generator 1 to be connected to the first piston 62 of the pneumatic tension regulator 6. Preferably, in one embodiment, the pneumatic cylinder 60 is detachably connected to the end flange 12 of the ultra-high pressure gas generator 1. After completing a launch, the pneumatic cylinder 60 is disassembled and a new pull rod 5 is replaced.

[0038] Specifically, in one embodiment, a weakening groove 50 is provided on the pull rod 5, and a shear weakening groove 40 is provided on the shear ring 4. The shear ring 4 and the pull rod 5 are both provided with weak positions, which is more conducive to rapid shearing or pulling.

[0039] Specifically, in one embodiment, the end of the ultra-high pressure gas generator 1 is sealed by an end flange 12 to form a sealed high pressure cavity 10, an injection pipe 14 is provided on the flange, and a gas source is added through the injection pipe. The ultra-high pressure gas generator 1 is built with a heating pipe 16 for heating the gas source in the ultra-high pressure gas generator 1. The bottom of the ultra-high pressure gas generator 1 is fixed to the ground through a base 7. A pressure ring is provided between the ultra-high pressure gas generator 1 and the shear ring 4 to compress the tail of the projectile 2, so as to facilitate the shear ring 4 to break in the expected direction and in the expected manner.

[0040] Preferably, the gas source can be solid CO2 or liquid CO2, which is heated by the electric heating tube 16 built into the ultra-high pressure gas generator 1, and the solid CO2 or liquid CO2 is converted into supercritical CO2 by constant volume, temperature and pressure by electric heating. The electric heating method is a physical process. There is no chemical reaction in the process of converting the CO2 medium from low pressure to ultra-high pressure. Compared with gunpowder or other chemical heating agents that easily produce high-temperature gas or corrosive substances, the use of electric heating can make the entire working process clean and pollution-free, which is beneficial to both prolonging the service life of the launch tube and the high-pressure container and reducing maintenance costs. In addition, it has the advantages of reusability and controllable energy output.

[0041] When the temperature and pressure of CO2 reach above the critical point (7.38MPa, 31.3℃), it will enter a supercritical state. At this time, CO2 is in a gaseous state, with a density close to that of a liquid, a viscosity close to that of a gas, and a diffusion coefficient between that of a gas and a liquid. The property of CO2 directly transforming from a solid or liquid state to a supercritical state can achieve greater power density energy storage, thereby reducing the space required for installation. In addition, the use of solid CO2 or liquid CO2 to maintain a normal pressure state during filling also improves operational safety during the filling process. Furthermore, the use of electric heating to transform CO2 from a solid or liquid state to a supercritical state has the characteristics of reusability, precise and controllable heat energy release, high safety, and good cleanliness of the launch medium compared to chemical exothermic agents (such as gunpowder).

[0042] In a specific embodiment, the device of the present application realizes a high acceleration process with a maximum overload of 20,000 g, a 90% maximum overload duration of 0.8 ms, and a 30% maximum overload duration of 4 ms. The corresponding ultra-high pressure gas generator release pressure is 250 MPa.

[0043] In one embodiment, the present invention provides a control method according to the tension-shear combination fast response pressure release device as described above, comprising:

[0044] S10, adding gas source medium to the ultra-high pressure gas generator 1;

[0045] S20, the pneumatic tension regulator 6 enables the pull rod 5 to provide working tension for the projectile 2, and together with the shear ring 4, restrict the movement of the projectile 2.

[0046] Specifically, in one embodiment, the air pressure part 621 of the pneumatic cylinder 60 is pre-filled with high-pressure gas to push the first piston 62 to move to the left so that the pull rod 5 is subjected to a working tension, and the magnitude of the working tension is determined by the pressure difference at both ends of the first piston 62; the value of the force measuring device is read to obtain the real-time working tension value, and the pressure difference at both ends of the first piston 62 is changed by the inflation amount to control the working tension in the pull rod 5 to always be less than the ultimate breaking force of the pull rod 5.

[0047] S30, increasing the pressure of the ultra-high pressure gas generator 1 to a level greater than the upper limit of the ultimate shear force of the shear ring 4.

[0048] S40, controlling the pull rod 5 to unload the working tension acting on the projectile 2 through the pneumatic tension regulator 6;

[0050] Specifically, in one embodiment, when the pressure of the ultra-high pressure gas generator 1 rises to a level greater than the upper limit of the shear force of the shear ring 4, the control valve 64 is opened, and the compressed air in the accumulator 65 pushes the second piston 66 to move in the opposite direction, thereby pushing the first piston 62 to move toward the projectile 2, and the working tension borne by the pull rod 5 is zero, that is, the working tension of the pull rod 5 acting on the projectile 2 is unloaded.

[0051] S50, the gas of the ultra-high pressure gas generator 1 quickly destroys the shear ring 4 and the rear pull rod 5 is quickly pulled off, thereby pushing the projectile to perform accelerated motion in the launch tube.

[0052] In the above control method, in the initial state, the air pressure part 621 of the pneumatic cylinder 60 is pre-charged with high-pressure gas, pushing the first piston 62 to move away from the projectile 2 so that the pull rod 5 bears the working tension; at the same time, the second piston 66 is pushed to move the air in the air pressure storage chamber 662 of the compressed accumulator 65, and at this time, the pull rod 5 and the shear ring 4 jointly limit the movement of the projectile 2. Then, the pressure of the ultra-high pressure gas generator 1 is increased to a limit greater than the upper limit of the ultimate shear force of the shear ring 4. When it is necessary to launch, the control valve 64 is opened, and the compressed air in the air pressure storage chamber 662 pushes the second piston 66 to move in the opposite direction, thereby pushing the first piston 62 back, and the working tension of the pull rod 5 is quickly unloaded, and the gas of the ultra-high pressure gas generator 1 is quickly released, destroying the shear ring 4 and causing the pull rod 5 to break, thereby pushing the projectile 2 to accelerate. The above control method is simple to operate, and can accurately control the launch time of the launch body 2 within a time range of several milliseconds to tens of milliseconds, and can be applied in experimental conditions with ultra-high acceleration up to 20,000g and ultra-high pressure up to 250 MPa.

Claims

1. A tension-shear combination quick response pressure release device, characterized in that: The invention comprises an ultra-high pressure gas generator, a projectile and a launch tube, wherein a shear ring is arranged between the ultra-high pressure gas generator and the projectile; and further comprises: A pull rod, one end of which is connected to the tail end of the projectile, and the other end of which passes through the end face of the ultra-high pressure gas generator away from the projectile through a dynamic seal, and is connected to a pneumatic tension regulator. A force measuring device is provided on the pull rod for detecting and monitoring the real-time working tension of the pull rod. The pneumatic tension regulator controls the working tension of the pull rod by pressure difference adjustment to always be less than the ultimate breaking force of the pull rod; and the working tension of the pull rod is greater than the difference between the ultimate shearing force upper limit and the ultimate shearing force lower limit of the shear ring. The shear ring and the pull rod act together on the projectile to limit the movement of the projectile before the projectile is launched; During the pressurization process of the ultra-high pressure gas generator, when the pressure of the ultra-high pressure gas generator increases to a level greater than the upper limit of the shear force of the shear ring, the pneumatic tension regulator unloads the working tension of the pull rod on the projectile through air pressure control, the shear ring is quickly damaged, and the pull rod breaks quickly, and the gas of the ultra-high pressure gas generator is quickly released, pushing the projectile to accelerate in the launch tube.

2. The tension-shear combination quick response pressure release device according to claim 1, characterized in that: The pneumatic tension regulator includes: a pneumatic cylinder, a first piston is arranged in the pneumatic cylinder, the first piston is connected to a pull rod, a pressure relief pipe and an air charging pipe are connected to the wall of the cavity of the pneumatic cylinder located on the side of the first piston close to the pull rod, a control valve is arranged on the pressure relief pipe, and an accumulator is connected to the wall of the cavity of the pneumatic cylinder located on the side of the first piston away from the pull rod, and a second piston is arranged in the accumulator.

3. The tension-shear combination quick response pressure release device according to claim 2, characterized in that: The pneumatic cylinder is detachably connected to the end flange of the ultra-high pressure gas generator.

4. The tension-shear combination quick response pressure release device according to claim 2, characterized in that: One end of the pull rod is inserted into the launch body to form a fastening connection, and the other end passes through the end flange of the ultra-high pressure gas generator to be connected with the first piston of the pneumatic tension regulator.

5. The tension-shear combination quick response pressure release device according to claim 4, characterized in that: A weakening groove is arranged on the pull rod, and an annular shear weakening groove is arranged on the shear ring. The working tension of the pull rod is greater than twice the difference between the upper limit of the ultimate shearing force and the lower limit of the ultimate shearing force of the shear ring.

6. The tension-shear combination quick response pressure release device according to claim 2, characterized in that: The pneumatic cylinder includes a pneumatic part and a hydraulic part. The pneumatic part is located on the side of the first piston close to the pull rod, and the hydraulic part is located on the side of the first piston away from the pull rod. The accumulator is divided into a hydraulic chamber and a pneumatic energy storage chamber by the second piston, and the hydraulic chamber is connected to the hydraulic part.

7. The tension-shear combination quick response pressure release device according to claim 1, characterized in that: A heating tube is provided in the ultra-high pressure gas generator for heating the gas source in the ultra-high pressure gas generator, and an injection tube is provided at the end of the ultra-high pressure gas generator for adding the gas source medium.

8. The tension-shear combination quick response pressure release device according to claim 7, characterized in that: The gas source medium is solid CO2 or liquid CO2, and the heating tube is an electric heating tube, which converts the solid CO2 or liquid CO2 into supercritical CO2 by constant volume, temperature and pressure increase through electric heating.

9. A control method for the tension-shear combination fast response pressure release device according to any one of claims 1 to 8, characterized in that: include: Adding gas source medium to the ultra-high pressure gas generator; The pneumatic tension regulator enables the pull rod to provide working tension for the projectile, and together with the shear ring, limits the movement of the projectile; The pressure of the ultra-high pressure gas generator is increased to a level greater than the upper limit of the ultimate shear force of the shear ring; The pneumatic tension regulator controls the pull rod to unload the working tension acting on the projectile; The gas from the ultra-high pressure gas generator quickly destroys the shear ring and the pull rod is quickly broken, thereby pushing the projectile to accelerate in the launch tube.

10. The control method according to claim 9, characterized in that: include: Pre-filling the pneumatic cylinder with high-pressure gas pushes the first piston to move leftward so that the pull rod bears a working tension, the magnitude of which is determined by the pressure difference at both ends of the first piston; changing the pressure difference at both ends of the first piston so as to control the working tension in the pull rod to always be less than the ultimate breaking force of the pull rod; After the pressure of the ultra-high pressure gas generator is increased to a level greater than the upper limit of the shearing force of the shear ring, the control valve is opened. The compressed air in the accumulator pushes the second piston to move in the opposite direction, thereby pushing the first piston back to the right. The working tension on the pull rod is unloaded, the shear ring is quickly destroyed, and the pull rod is quickly broken, thereby pushing the projectile to accelerate in the launch tube.

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