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

Abstract

This invention belongs to the field of impact testing technology and discloses a combined tension-shear fast-response pressure relief device, including an ultra-high pressure gas generator, a shear ring, an emitter, and an emitter tube; it also includes a pull rod, one end of which is connected to the tail end of the emitter, and the other end passes through the end face of the ultra-high pressure gas generator away from the emitter and is connected to a pneumatic tension controller. A force measuring device is provided on the pull rod to detect the real-time working tension of the pull rod. The pneumatic tension controller controls the working tension of the pull rod to be less than, and always less than, the ultimate breaking force of the pull rod through differential pressure adjustment; and the working tension of the pull rod is greater than the difference between the upper limit and lower limit of the ultimate shear force of the shear ring. The shear ring and the pull rod work together to restrict the movement of the emitter before it is launched. A control method is also provided. This device and method are applicable to ultra-high pressure and ultra-high acceleration and can precisely control the pressure relief process to achieve precise control of the launch process.

Description

Technical Field

[0001] This invention belongs to the field of impact testing technology, and particularly relates to a tension-shear combined fast-response pressure relief device and its control method. Background Technology

[0002] There are two types of test apparatus for high-speed impact testing: one uses pyrotechnic devices such as ballistic guns, which have high testing efficiency, but their widespread application is limited due to the regulated nature of pyrotechnics; the other uses a multi-stage air cannon system, where high-pressure gas propels the impact test projectile to accelerate, reaching speeds exceeding 700 m / s. The rapid release device, a key component of high-speed impact testing, directly determines the success rate of the test. However, existing rapid release devices are complex in structure and have unsatisfactory control effects. Under ultra-high pressure conditions, open-valve rapid release devices require extremely high valve strength and control precision. Currently, ultra-high pressure valves generally have small flow diameters and long response times, making it difficult to meet the requirements of large-diameter, high-mass projectile impact tests. Diaphragm-type rapid release devices typically work in conjunction with valves, and also face technical challenges such as instantaneous control, large flow rates (due to the difficulty of fully opening the diaphragm), and reliable sealing. Summary of the Invention

[0003] To overcome the shortcomings and defects mentioned in the background art, this invention provides a tension-shear combined fast-response pressure relief device and its control method suitable for ultra-high acceleration and capable of precise control of the pressure relief process. To solve the above technical problems, the technical solution proposed by this invention is as follows:

[0004] A shear-shear combined fast-response pressure relief device includes an ultra-high pressure gas generator, an emitter, and an emitter tube, with a shear ring disposed between the ultra-high pressure gas generator and the emitter; it also includes:

[0005] The pull rod is connected at one end to the tail end of the launcher, and at the other end through a dynamic seal to the end face of the ultra-high pressure gas generator away from the launcher, and is connected to the pneumatic tension controller. The pull rod is equipped with a force measuring device to detect and monitor the real-time working tension of the pull rod. The pneumatic tension controller controls the working tension of the pull rod to always be less than the ultimate breaking force of the pull rod through differential pressure adjustment; and the working tension of the pull rod is greater than the difference between the upper limit and the lower limit of the ultimate shearing force of the shear ring. The shear ring and the pull rod work together to restrict the movement of the launcher before the launcher 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 shearing force of the shear ring, the pneumatic tension controller uses air pressure control to unload the working tension acting on the launcher by the tie rod. The shear ring breaks rapidly, and the tie rod breaks rapidly, causing the gas in the ultra-high pressure gas generator to be released rapidly, which propels the launcher to accelerate within the launch tube.

[0007] In one embodiment, the pneumatic tension controller includes: a pneumatic cylinder, a first piston inside the pneumatic cylinder, the first piston being connected to a pull rod, a pressure relief pipe and an air filling pipe connected to the wall of the cavity of the pneumatic cylinder located on the side of the first piston near the pull rod, a control valve being provided on the pressure relief pipe, and an accumulator connected to the wall of the cavity of the pneumatic cylinder located on the side of the first piston away from the pull rod, the accumulator containing a second piston.

[0008] In one embodiment, the pneumatic cylinder is detachably connected to the 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 launcher to form a fastening connection, and the other end passes through the end flange of the ultra-high pressure gas generator and is connected to the first piston of the pneumatic tension controller.

[0010] In one embodiment, the tie rod is provided with a weakening groove, and the shear ring is provided with a shear weakening groove. The working tensile force of the tie rod is greater than twice the difference between the upper limit and the lower limit of the ultimate shear force of the shear ring.

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

[0012] In one embodiment, the ultra-high pressure gas generator is provided with a heating tube for heating the gas source inside 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 solid CO2 or liquid CO2 into supercritical CO2 by constant volume heating and pressure increase through electric heating.

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

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

[0016] The pneumatic tension controller enables the pull rod to provide working tension to the launcher, and together with the shear ring, it restricts the movement of the launcher.

[0017] Increase the pressure of the ultra-high pressure gas generator to a level greater than the upper limit of the shearing force of the shear ring;

[0018] The working tension acting on the launcher is unloaded by controlling the pull rod through a pneumatic tension regulator;

[0019] The gas from the ultra-high pressure gas generator rapidly destroys the shear ring, causing the pull rod to snap quickly, which in turn propels the launcher to accelerate inside the launch tube.

[0020] In one embodiment, it includes:

[0021] The pneumatic cylinder is pre-charged with high-pressure gas, which pushes the first piston to move to the left, thereby causing the pull rod to bear the working tension. The magnitude of the working tension is determined by the pressure difference between the two ends of the first piston. By changing the pressure difference between the two ends of the first piston, the working tension in the pull rod is always controlled to 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 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 to retract to the right. The working tension borne by the tie rod is unloaded, that is, the working tension is zero. After the shear ring is quickly destroyed, the tie rod is quickly pulled off, which in turn pushes the launcher to accelerate inside the launch tube.

[0023] Compared with existing technologies, the advantages of this invention are as follows: Existing technologies achieve controllable launch by destroying the shear ring under high pressure, which eliminates the need for pyrotechnics and leaves no residue after launch, essentially achieving clean launch. The shear ring design makes static sealing under ultra-high pressure conditions simpler and allows for a larger gas flow area, resulting in greater acceleration overload. Since higher launch pressures in ultra-high pressure gas generators place higher demands on the equipment and increase operational risks, the design launch pressure is generally set slightly higher than the shear ring's ultimate bearing pressure. However, due to limitations in shear ring material and processing precision, the shearing force of the shear ring always exhibits a certain degree of deviation, such as a fluctuation of approximately 10 MPa between the upper and lower limits of the shear ring's ultimate bearing pressure (this is just an example; actual deviations may vary). This results in a non-one-to-one correspondence between the theoretically designed launch pressure of the ultra-high pressure gas generator and the shear ring's shearing force, and makes precise control of launch time impossible.

[0024] In the pull-shear combined fast-response pressure relief device and method of this application, a shear ring is provided between the ultra-high pressure gas generator and the launcher; one end of the pull rod is connected to the tail end of the launcher, and the other end passes through the end face of the ultra-high pressure gas generator away from the launcher; and it is connected to a pneumatic tension controller. A force measuring device is provided 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 and lower limit of the ultimate shear force of the shear ring. The shear ring and the pull rod work together to restrict the movement of the launcher before it is launched. During the pressurization process of the ultra-high pressure gas generator, the pneumatic tension controller 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 level greater than the upper limit of the ultimate shear force of the shear ring, the pneumatic tension controller unloads the pressure through air pressure, causing the pull rod to be unable to share the pressure of the shear ring. The shear ring breaks rapidly along the annular shear groove. At this time, the pull rod at the tail end of the launcher, which is solely supported, also breaks rapidly. The gas from the ultra-high pressure gas generator is released rapidly, propelling the launcher to accelerate within the launch tube. By flexibly controlling the lever, precise control of the launcher can be achieved. Using the device and method of this application, the launch time of the launcher can be controlled within the range of several milliseconds to tens of milliseconds, and the device and method of this application can be applied to experimental conditions where the launcher experiences ultra-high acceleration of up to 20,000g and ultra-high pressure of up to 250 MPa. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a tension-shear combination fast-response pressure relief device according to one embodiment. Detailed Implementation

[0027] To facilitate understanding of the present invention, the present invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of protection of the present invention is not limited to the following specific embodiments.

[0028] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of the invention.

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

[0030] Please see Figure 1 A combination shear and pressure relief device with rapid response includes an ultra-high pressure gas generator 1, an emitter 2 and an emitter tube 3, a shear ring 4, a pull rod 5, and a pneumatic tension controller 6. The ultra-high pressure gas generator 1 and the emitter tube 3 are sealed together. The emitter 2 is located at one end of the emitter tube 3 near the ultra-high pressure gas generator 1, and the shear ring 4 is located between the ultra-high pressure gas generator 1 and the emitter 2. One end of the pull rod 5 is connected to the tail end of the launcher 2, and the other end passes through the end face of the ultra-high pressure gas generator 1 away from the launcher 2 via a dynamic seal, and is connected to the pneumatic tension controller 6. The pull rod 5 is equipped with a force measuring device to detect and monitor the real-time working tension of the pull rod 5. The pneumatic tension controller 6 controls the working tension of the pull rod 5 to be less than, and always less than, the ultimate breaking force of the pull rod 5 through differential pressure adjustment. Furthermore, the working tension of the pull rod 5 is greater than the difference between the upper and lower limits of the ultimate shearing force of the shear ring 4. The shear ring 4 and the pull rod 5 work together to restrict the movement of the launcher 2 before it is launched. During the pressurization process of generator 1, when the pressure of ultra-high pressure gas generator 1 increases to a level greater than the upper limit of the shearing force of shear ring 4, the pneumatic tension controller 6 unloads the pressure through air pressure, making the working tension of the pull rod 5 zero. At this time, the pressure originally shared by the pull rod 5 is applied to the shear ring 4. Since the pressure of ultra-high pressure gas generator 1 is greater than the upper limit of the shearing force of shear ring 4, the shear ring 4 breaks rapidly. At the same time as the shear ring 4 breaks, the pull rod 5 will also break rapidly under the pressure of ultra-high pressure gas generator 1. The gas in ultra-high pressure gas generator 1 is released rapidly, pushing the launcher 2 to accelerate within the launch tube 3.

[0031] Among them, the shearing force of shear ring 4 always has a certain deviation, such as the difference between the upper limit and the lower limit of the ultimate bearing pressure of shear ring 4 being about 10 MPa (for example, in reality it may be other numerical deviations). This causes the theoretically designed ultra-high pressure gas generator to have a high-pressure output pressure and the ultimate shearing force (area) of shear ring 4 to fluctuate. The pressure values ​​are not one-to-one; therefore, shear ring 4 has an upper limit and a lower limit of ultimate bearing pressure, and shear ring 4 also has an upper limit and a lower limit of ultimate shear force. The ultimate tensile force of tie rod 5 is determined by its material properties and structure, and has a known value.

[0032] The pull-shear combined fast-response pressure relief device and method of this application can achieve precise control of the launcher 2 through the flexible control of the pull rod 5. Using the device and method of this application, the launch time of the launcher 2 can be controlled within the range of several milliseconds to tens of milliseconds, and the device and method of this application can be applied to experimental conditions with ultra-high acceleration of up to 20,000g and ultra-high pressure of up to 250 MPa. The fast response refers to the action occurring within the 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 and the lower limit of the ultimate shear force of the shear ring 4, so as to ensure 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 pull rod 5 can be used to prevent the launcher 2 from moving. When the working tension of the pull rod 5 is unloaded, the launcher 2 can be launched quickly.

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

[0035] Specifically, in one embodiment, the pneumatic cylinder 60 includes a pneumatic section 621 and a hydraulic section 622. The pneumatic section 621 is located in the space above the first piston 62, and a pressure relief pipe and an inflation pipe are disposed on the wall of the pneumatic section 621. The hydraulic section 622 is located in the space below the first piston 62, and the accumulator 65 is divided into a hydraulic chamber 660 and a pneumatic accumulator chamber 662 by a second piston 66. The hydraulic chamber 660 is connected to the hydraulic section 622. The hydraulic section 622 and the hydraulic chamber 660 of the pneumatic cylinder 60 and the accumulator 65 are hydraulically powered, which can reduce the structural sealing requirements.

[0036] The working pulling force of the pull rod 5 is determined by the pneumatic pulling force controller 6. Specifically, the working pulling force 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 in the pneumatic energy storage chamber 662 of the accumulator 65, and the first piston 62 moves towards the launcher 2, at which point the working pulling force of the pull rod 5 is zero. When high-pressure gas is introduced into the pneumatic pressure section 621, the first piston 62 moves in the opposite direction, and the pull rod 5 bears the working pulling force, which is the product of the pressure difference and the area on both sides of the first piston 62. This pressure difference is controlled so that the working pulling force borne by the pull rod 5 can share the impact force generated by the gas from the ultra-high pressure gas generator 1 with the shear ring 4, without causing it to break (less than the ultimate breaking force of the pull rod 5). The real-time working pulling force of the pull rod 5 is read by the force measuring device on the pull rod 5, and the real-time working pulling force can be adjusted by controlling the amount of gas introduced into the pneumatic pressure section 621 to meet the above requirements. The force measuring device can be a strain gauge, or any other force measuring device capable of measuring working tensile force.

[0037] Specifically, in one embodiment, one end of the pull rod 5 is inserted into the launcher 2 to form a secure connection, for example, by means of threads, slots, etc., and the other end passes through the end flange 12 of the ultra-high pressure gas generator 1 and is connected to the first piston 62 of the pneumatic tension controller 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 one launch is completed, the pneumatic cylinder 60 is removed and a new pull rod 5 is replaced.

[0038] Specifically, in one embodiment, the tie rod 5 is provided with a weakening groove 50, and the shear ring 4 is provided with a shear weakening groove 40. Both the shear ring 4 and the tie rod 5 are provided with weak points, which is more conducive to rapid shearing or pulling apart.

[0039] Specifically, in one embodiment, the end of the ultra-high pressure gas generator 1 is sealed by an end flange 12, forming a sealed high-pressure chamber 10. An injection pipe 14 is provided on the flange, through which a gas source is introduced. The ultra-high pressure gas generator 1 has a built-in heating pipe 16 for heating the gas source inside. The bottom of the ultra-high pressure gas generator 1 is fixed to the ground by a base 7. A pressure ring is provided between the ultra-high pressure gas generator 1 and the shear ring 4 to press the tail of the emitter 2, facilitating the shear ring 4 to rupture in the desired direction and manner.

[0040] Preferably, the gas source can be solid CO2 or liquid CO2, which is heated by an electric heating tube 16 built into the ultra-high pressure gas generator 1. The solid or liquid CO2 is converted into supercritical CO2 through constant-volume temperature and pressure increase using electric heating. Electric heating is a physical process; no chemical reaction occurs during the process of increasing the CO2 medium from low pressure to ultra-high pressure. Compared to gunpowder or other chemical exothermic agents, which easily produce high-temperature gases or corrosive substances, electric heating makes the entire process clean and pollution-free. This not only improves the service life of the launch tube and high-pressure container but also reduces maintenance costs. Furthermore, it has the advantages of reusability and controllable energy output.

[0041] Once CO2 reaches its critical point (7.38 MPa, 31.3 °C) and its pressure exceeds this point, it enters a supercritical state. In this state, CO2 is gaseous, 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 ability of CO2 to directly transform from a solid or liquid state to a supercritical state allows for higher power density energy storage, thus reducing the space required for installation. Furthermore, using solid or liquid CO2 at atmospheric pressure during filling improves operational safety. Moreover, using electric heating to transform CO2 from a solid or liquid state to a supercritical state offers advantages over chemical exothermic agents (such as gunpowder) including reusability, precise and controllable heat release, high safety, and a cleaner emission medium.

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

[0043] In one embodiment, the present invention provides a control method for a fast-response pressure relief device based on the tension-shear combination as described above, comprising:

[0044] S10. Add gas source medium to ultra-high pressure gas generator 1;

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

[0046] Specifically, in one embodiment, high-pressure gas is pre-charged into the pneumatic cylinder 60's pneumatic section 621 to push the first piston 62 to move to the left, thereby causing the pull rod 5 to bear the working tension. The magnitude of the working tension is determined by the pressure difference between the two ends of the first piston 62. The value of the force measuring device is read to obtain the real-time working tension value. By changing the pressure difference between the two ends of the first piston 62 through the amount of gas filling, the working tension in the pull rod 5 is controlled to always be less than the ultimate breaking force of the pull rod 5.

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

[0048] S40. The working tension acting on the launcher 2 is unloaded by controlling the pull rod 5 through the pneumatic tension regulator 6.

[0049] 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 shearing force of the shear ring 4, the control valve 64 is opened, and the compressed air of the accumulator 65 pushes the second piston 66 to move in the opposite direction, thereby pushing the first piston 62 to move towards the launcher 2. The working tension of the pull rod 5 is zero, that is, the working tension of the pull rod 5 acting on the launcher 2 is unloaded.

[0050] S50, the gas of the ultra-high pressure gas generator 1 quickly breaks the shear ring 4 and the pull rod 5 is quickly pulled off, thereby pushing the launcher to accelerate inside the launch tube.

[0051] In the above control method, in the initial state, high-pressure gas is pre-charged into the pneumatic cylinder 60's pneumatic section 621, pushing the first piston 62 to move away from the launcher 2, causing the pull rod 5 to bear the working tension; at the same time, the second piston 66 is pushed to move and compress the air in the pneumatic energy storage chamber 662 of the accumulator 65. At this time, the pull rod 5 and the shear ring 4 together restrict the movement of the launcher 2. Then, the pressure of the ultra-high pressure gas generator 1 is increased to a level greater than the upper limit of the shearing force of the shear ring 4. When launch is required, the control valve 64 is opened, and the compressed air in the pneumatic energy storage chamber 662 pushes the second piston 66 to move in the opposite direction, thereby pushing the first piston 62 to retract. The working tension of the pull rod 5 is quickly unloaded, and the gas in 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 launcher 2 to accelerate. The above control method is simple to operate and can accurately control the launch time of the launcher 2 within the range of several milliseconds to tens of milliseconds. It can also be applied to experimental conditions with ultra-high acceleration of up to 20,000g and ultra-high pressure of up to 250 MPa.

Claims

1. A tensile-shear combined quick response pressure relief device, characterized by, The application relates to a high-pressure gas generator, a projectile and a launching barrel, a shear ring is arranged between the high-pressure gas generator and the projectile; the application further relates to A pull rod is connected at one end to the tail end of the projectile and at the other end passes through the end face of the high-pressure gas generator away from the projectile in a dynamic sealing mode and is connected to a pneumatic tension regulator; a force measuring device is arranged 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 through differential pressure regulation and ensures that the working tension of the pull rod is always less than the limit breaking tension of the pull rod; the working tension of the pull rod is greater than the difference between the upper limit and the lower limit of the limit shearing force of the shear ring; the shear ring and the pull rod jointly act on the projectile and limit the movement of the projectile before the projectile is launched; During the pressure increasing process of the high-pressure gas generator, when the pressure of the high-pressure gas generator is increased to be greater than the upper limit of the limit shearing force of the shear ring, the pneumatic tension regulator controls the working tension of the pull rod acting on the projectile to be unloaded through air pressure control, the shear ring is quickly damaged, the pull rod is quickly broken, the gas of the high-pressure gas generator is quickly released, and the projectile is pushed to do accelerated motion in the launching barrel.

2. The pull-shear combination quick response pressure relief device according to claim 1, wherein The pneumatic tension regulator comprises a pneumatic cylinder, a first piston is arranged in the pneumatic cylinder, the first piston is connected to the pull rod, a pressure relief pipe and an inflation pipe are connected to the wall surface of the cavity of the pneumatic cylinder on the side close to the first piston, a control valve is arranged on the pressure relief pipe, an energy accumulator is communicated with the wall surface of the cavity of the pneumatic cylinder on the side away from the first piston, and a second piston is arranged in the energy accumulator.

3. The pull-shear combination quick response pressure-relief device according to claim 2, wherein The pneumatic cylinder is detachably connected to the end flange of the high-pressure gas generator.

4. The pull-shear combination quick response pressure-relief device according to claim 2, wherein One end of the pull rod is inserted into the projectile to form a fastening connection, and the other end is connected to the first piston of the pneumatic tension regulator through the end flange of the high-pressure gas generator.

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

6. The pull-shear combination quick response pressure-relief device according to claim 2, wherein The pneumatic cylinder comprises a gas pressure part and a hydraulic part, the side close to the first piston of the pneumatic cylinder is the gas pressure part, the side away from the first piston of the pneumatic cylinder is the hydraulic part, the energy accumulator is divided into a hydraulic chamber and a gas pressure energy storage chamber through the second piston, and the hydraulic chamber is communicated with the hydraulic part.

7. The pull-shear combination quick response pressure-relief device according to claim 1, wherein A heating pipe is arranged in the high-pressure gas generator and used for heating the gas source in the high-pressure gas generator, and an injection pipe is arranged in the end of the high-pressure gas generator and used for adding a gas source medium.

8. The pull-shear combination quick response pressure-relief device according to claim 7, wherein The gas source medium is solid CO2 or liquid CO2, the heating pipe is an electric heating pipe, and the solid CO2 or liquid CO2 is converted into supercritical CO2 through electric heating mode constant volume temperature rising and pressure increasing.

9. A control method of the pull-shear combined quick response pressure relief device according to any one of claims 2 to 6, characterized by, The application relates to a high-pressure gas generator, a projectile and a launching barrel, a shear ring is arranged between the high-pressure gas generator and the projectile; the application further relates to A gas source medium is added to the high-pressure gas generator; The pull rod provides working tension for the projectile through the pneumatic tension regulator and jointly limits the movement of the projectile with the shear ring; The pressure of the high-pressure gas generator is increased to be greater than the upper limit of the limit shearing force of the shear ring; The working tension of the pull rod acting on the projectile is unloaded through the pneumatic tension regulator; The gas quick breaking shear ring of the superhigh pressure gas generator is pulled to break quickly, and then the launching body is accelerated in the launching cylinder.

10. The control method according to claim 9, characterized by The application relates to a high-pressure gas generator and a launching device. The high-pressure gas generator is precharged with high-pressure gas, the first piston is pushed to move leftwards, the pull rod bears working tension, and the working tension is determined by the pressure difference between the two ends of the first piston; the pressure difference between the two ends of the first piston is changed to control the working tension in the pull rod to be always less than the limit breaking force of the pull rod; After the pressure of the superhigh pressure gas generator is increased to be greater than the upper limit of the limit breaking force of the shear ring, the control valve is opened, the compressed air of the energy accumulator pushes the second piston to move reversely, the first piston is pushed to move rightwards, the working tension borne by the pull rod is unloaded, the shear ring is broken quickly, the pull rod is pulled to break quickly, and then the launching body is accelerated in the launching cylinder.

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