A remote gas charging and discharging system for hydrogen-oxygen detonation driven two-stage light gas gun

Abstract

The application provides a remote gas charging and discharging system for a hydrogen-oxygen explosion driven two-stage light gas gun, which is used for remote gas charging and discharging of a combustion chamber and a pump pipe of the two-stage light gas gun, and comprises a valve assembly, an emergency exhaust branch and a gas injection branch, which are arranged in the combustion chamber and the pump pipe and are used for vacuumizing, gas injection, exhaust, pressure measurement and remote control of the combustion chamber and the pump pipe; and a control system, which realizes remote operation control of the gas injection process and the gas discharging process through a PLC controller and integrates gas injection pressure and vacuum degree display functions of each section. The system of the application can realize remote operation of hydrogen and oxygen gas injection in an experiment process, realizes remote gas discharging of hydrogen-oxygen mixed gas in the combustion chamber and hydrogen gas in the pump pipe in an emergency, thereby isolating experiment personnel from the gas charging and discharging site, and has important significance for improving personal safety of operators in an experiment process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of super-speed launching technology, and in particular to a remote gas charging and discharging system for a hydrogen-oxygen detonation driven two-stage light gas gun. BACKGROUND

[0002] The two-stage light gas gun is the most mature and widely used ground super-speed acceleration device. Currently, two-stage light gas guns at home and abroad generally use two driving methods, one is powder driving, and the other is high-pressure gas driving. For powder driving, because the molecular weight of powder gas is very large, about 25 times that of hydrogen, when driving the piston of the first-stage pump pipe, the energy consumed for accelerating the powder gas itself is comparable to the energy obtained by the acceleration of the piston, thereby causing the larger the charge, the lower the energy utilization rate, and the two-stage light gas gun using powder driving has a speed limit. In addition, the powder gas also has problems such as toxic products, limited transportation and storage, and difficult cleaning of the gun, low operation efficiency, and high test cost. For high-pressure gas driving, although the energy utilization rate is high, the total driving energy of high-pressure gas is very limited, and it is difficult to break through 7 km / s for launching a large mass projectile. In order to solve the shortcomings of the above two driving methods, in recent years, the use of reaction gas energy release as driving energy has been proposed in China. The first stage of the light gas gun driven by reaction gas uses the high-temperature and high-pressure products generated by the detonation of premixed hydrogen and oxygen in the closed space of the combustion chamber to drive the piston. This driving method can increase the pressure at the bottom of the piston and improve the average projectile bottom pressure during the launching process, thereby qualitatively improving the projectile speed. However, during the experiment, the hydrogen gas in the combustion chamber and the pump pipe needs to be manually opened and closed by personnel on site. Because the hydrogen-oxygen mixed gas is extremely easy to react under the action of static electricity or high temperature, the on-site operation of the experiment personnel has safety risks. At the same time, the two-stage light gas gun launching process may also have the extreme case of hydrogen-oxygen reaction ignition failure, at which time the hydrogen-oxygen mixed gas in the combustion chamber and the hydrogen gas in the pump pipe need to be discharged to the atmosphere, and the on-site manual operation of the experiment personnel also has safety risks. SUMMARY

[0003] The purpose of the present application is to solve the above problems, change the existing manual gas charging and discharging method of the reaction gas driven two-stage light gas gun, design a remote automatic control system, realize remote operation of hydrogen and oxygen charging during the experiment, and realize remote discharging of the hydrogen-oxygen mixed gas in the combustion chamber and the hydrogen gas in the pump pipe in emergency situations, thereby isolating the experiment personnel from the gas charging and discharging site, which is of great significance to improving the personal safety of the operating personnel during the experiment.

[0004] To achieve the above purpose, the present application adopts the following technical solutions:

[0005] The application provides a remote gas charging and discharging system for a hydrogen-oxygen explosion driven two-stage light gas gun, which is used for remote gas charging and discharging of a combustion chamber and a pump pipe of the two-stage light gas gun, and comprises the following:

[0006] A valve assembly is arranged in the combustion chamber and the pump pipe, and is used for vacuumizing, gas charging, gas discharging, pressure measurement and remote control of the combustion chamber and the pump pipe.

[0007] A control system is used for remote operation control of the gas charging process and the gas discharging process through a PLC controller, and is integrated with gas charging pressure and vacuum degree display functions.

[0008] In some embodiments, the application further comprises the following technical features:

[0009] The gas charging branch comprises a combustion chamber gas charging branch and a pump pipe gas charging branch, wherein the combustion chamber gas charging branch comprises a combustion chamber hydrogen gas charging branch and a combustion chamber oxygen gas and nitrogen gas charging branch, and the pump pipe gas charging branch is a pump pipe hydrogen gas charging branch; the emergency gas discharging branch comprises a combustion chamber emergency gas discharging branch and a pump pipe emergency gas discharging branch.

[0010] The combustion chamber hydrogen gas charging branch comprises a high-pressure stop valve, which is directly connected with a combustion chamber cavity and bears high pressure in the cavity; the combustion chamber oxygen gas charging branch comprises a conventional electromagnetic valve; and the combustion chamber emergency gas discharging branch comprises a high-pressure stop valve.

[0011] The combustion chamber hydrogen gas charging branch further comprises a high-pressure check valve, which works together with the high-pressure stop valve in the same branch to protect the gas control high-pressure stop valve from being damaged; a pressure monitoring device is arranged in the combustion chamber emergency gas discharging branch to monitor pressure change in the combustion chamber gas charging process, and no high-pressure check valve is arranged in the combustion chamber emergency gas discharging branch.

[0012] The combustion chamber hydrogen gas charging branch comprises a high-pressure hand valve, a high-pressure check valve, a gas control electric valve and a pressure reducing valve connected with a hydrogen source, and is used for hydrogen injection of the combustion chamber.

[0013] The combustion chamber oxygen gas and nitrogen gas charging branch comprises a high-pressure hand valve, a high-pressure check valve, an electromagnetic valve and a pressure reducing valve connected with a gas source, and is used for oxygen gas and nitrogen gas injection of the combustion chamber.

[0014] The combustion chamber emergency gas discharging branch further comprises a fire retardant device, and the branch is used for emergency gas discharging in abnormal conditions; the high-pressure stop valve of the combustion chamber emergency gas discharging branch comprises a high-pressure hand valve and a gas control electric valve.

[0015] In the combustion chamber emergency gas discharging branch, a vacuumizing branch is installed between the high-pressure hand valve and the gas control electric valve, the branch is connected to a pump pipe vacuumizing system through an electromagnetic valve and a bellows, and is used for vacuumizing of the combustion chamber; a pressure transmitter is further installed between the high-pressure hand valve and the gas control electric valve, and is used for remote gas charging pressure monitoring and automatic gas charging control.

[0016] The three branches of the combustion chamber hydrogen injection branch, the combustion chamber oxygen and nitrogen injection branch, and the combustion chamber emergency exhaust branch are provided with high-pressure manual valves on the side close to the combustion chamber, and the remote electric valves of the hydrogen injection pipeline and the emergency exhaust remote electric valve are gas-controlled electric valves.

[0017] The pump pipe hydrogen injection branch includes a high-pressure stop valve directly connected with the pump pipe cavity and bearing high pressure in the cavity.

[0018] The pump pipe hydrogen injection branch further includes a high-pressure check valve which works together with the high-pressure stop valve under the same branch to protect the gas-controlled high-pressure stop valve from being damaged.

[0019] The pump pipe hydrogen injection branch includes a high-pressure manual valve, a high-pressure check valve, a gas-controlled electric valve, and a pressure reducing valve connected with a hydrogen source.

[0020] The pump pipe emergency exhaust branch includes a high-pressure manual valve, a gas-controlled electric valve, and a flame arrestor for emergency exhaust in abnormal conditions and exhaust of combustion product gas after the experiment.

[0021] The two branches of the pump pipe hydrogen injection branch and the pump pipe emergency exhaust branch are provided with high-pressure manual valves on the side close to the pump pipe.

[0022] The beneficial effects of the present application are as follows:

[0023] The two-stage light gas gun hydrogen-oxygen remote charging and discharging system of the present application realizes remote operation of hydrogen and oxygen injection in the process of hydrogen-oxygen detonation driving the two-stage light gas gun experiment, and realizes remote discharging of hydrogen-oxygen mixed gas in the combustion chamber and pump pipe hydrogen in emergency conditions, thereby effectively isolating the experiment personnel from the charging and discharging site, which is of great significance to improving the personal safety of the operating personnel in the experiment process. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 FIG. 1 is a schematic diagram of the valve assembly installed in the hydrogen-oxygen combustion chamber in the embodiment of the present application.

[0025] Figure 2 FIG. 2 is a schematic diagram of the valve assembly installed in the pump pipe in the embodiment of the present application.

[0026] Figure 3 FIG. 3 is a remote display control integration diagram in the embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the technical solutions and advantages of the present application clearer, the technical solutions of the embodiments of the present application will be described in detail below in conjunction with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0028] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, in which the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0029] The two-stage light gas gun hydrogen-oxygen remote charging and discharging system of the present application is divided into two parts: (1) valve assembly, and (2) control system. The valve assembly is mainly arranged in the combustion chamber and the pump pipe, and is mainly used for vacuumizing, gas charging, gas discharging, pressure measurement and remote control. The valve assembly is connected through certain logical relationship, and is divided into a gas charging branch and an emergency gas discharging branch. The high-pressure stop valve in the hydrogen gas charging branch of the combustion chamber is directly connected with the combustion chamber and the pump pipe cavity, and bears high pressure in the cavity. The high-pressure check valve ensures that the gas only enters but does not exit during the gas charging process, and cooperates with the high-pressure stop valve to protect the gas control high-pressure stop valve from being damaged. There is no ignition risk in the oxygen gas charging branch of the combustion chamber, so the gas control high-pressure stop valve is replaced by a traditional electromagnetic valve. The high-pressure check valve is not arranged after the high-pressure stop valve in the emergency gas discharging branch of the combustion chamber, so as to ensure that the hydrogen-oxygen mixed gas can be discharged when the gas control high-pressure stop valve is opened. By arranging a pressure monitoring device, the pressure change during the charging process of the combustion chamber is monitored. The hydrogen gas charging branch and the emergency gas discharging branch of the pump pipe are arranged the same as the combustion chamber, and will not be described again. The control system realizes remote operation control of the gas charging process and the gas discharging process through a PLC controller, and integrates the gas charging pressure and the vacuum degree display function of each section. The control operation table is arranged in the control room, so as to realize remote operation.

[0030] The valve assembly of the combustion chamber is as shown in Figure 1As shown, it is mainly divided into 3 paths, respectively: (1) hydrogen injection branch, including high pressure manual valve, high pressure check valve, pneumatic electric valve and pressure reducing valve connected with hydrogen source, etc., for hydrogen injection of combustion chamber; (2) oxygen and nitrogen injection branch, including high pressure manual valve, high pressure check valve, solenoid valve and pressure reducing valve connected with gas source, etc., for oxygen and nitrogen injection of combustion chamber; (3) pressure measuring emergency discharge branch, including high pressure manual valve, pneumatic electric valve and flame arrestor, etc., for emergency exhaust in abnormal situation. A vacuum extraction branch is installed between the high pressure manual valve and the pneumatic electric valve, which is connected to the pump pipe vacuum extraction system through the solenoid valve and the bellows, and is used for vacuum extraction of the combustion chamber. A pressure transmitter is also installed between the high pressure manual valve and the pneumatic electric valve, which is used for remote injection pressure monitoring and automatic injection control. The pressure of the combustion chamber is very high after hydrogen-oxygen combustion, and the common electric valve is difficult to withstand such high pressure, so high pressure manual valves are needed on the side of the combustion chamber for the three branches. Hydrogen is a flammable gas, in order to reduce the risk of injection, the remote electric valve of the hydrogen injection pipeline and the emergency discharge remote electric valve are pneumatic high pressure electric valves.

[0031] The valve assembly installed on the pump pipe is as shown in Figure 2 As shown, it is mainly divided into 2 paths, respectively: (1) hydrogen injection branch, including high pressure manual valve, high pressure check valve, pneumatic electric valve and pressure reducing valve connected with hydrogen source, etc., a pressure transmitter is installed between the high pressure manual valve and the high pressure check valve, which is used for remote injection pressure monitoring and automatic injection control; (2) vacuum extraction, pressure measurement and discharge branch, including high pressure manual valve, pneumatic electric valve and flame arrestor, etc., for emergency exhaust in abnormal situation and discharge of combustion product gas after experiment. A vacuum extraction branch is installed between the high pressure manual valve and the pneumatic electric valve, which is provided with a solenoid valve, a resistance silicon, a combustion chamber vacuum extraction bellows and a vacuum extraction master control solenoid valve, and the vacuum extraction master control solenoid valve is connected to the vacuum pump through the bellows. During the experiment preparation process, after the vacuum extraction of the combustion chamber and the pump pipe is completed, the vacuum degree displayed by the resistance silicon is recorded after the vacuum extraction master control solenoid valve is closed, then the two solenoid valves at the ends of the combustion chamber and the pump pipe are closed, and then the injection operation is carried out. During the process of compressing hydrogen in the pump pipe by the piston, the pressure before and after the piston in the pump pipe is very high, so high pressure manual valves are also needed on the side of the pump pipe.

[0032] The high pressure manual stop valve of the three gas paths on the combustion chamber and the two gas paths on the pump pipe is a super high pressure manual needle valve of CIR-LOK, and the pressure rating is 413.7 MPa (60000 psi). The remote control valves of the hydrogen injection branch and the emergency discharge branch of the hydrogen-oxygen combustion chamber and the pump pipe are super high pressure pneumatic needle valves of CIR-LOK, which are provided with a set of pneumatic device on the basis of the aforementioned needle valve, and a gas pump is used for remote control switching. The oxygen and nitrogen injection branch of the combustion chamber and the nitrogen injection branch of the separation section of the separation chamber adopt anti-explosion solenoid valves of Chongqing Gangzheng, as shown in Figure 3The switch is controlled by remote PLC. The pressure transmitter is S20 pressure transmitter of WIKA, with a range of 25 MPa and an accuracy of 0.25%.

[0033] The gas injection process control, gas discharge control, gas injection pressure display and vacuum degree display of each section are integrated into the control console, which is arranged in the measurement and control room and remotely controlled by the PLC controller. The PLC controller is installed in the console, and the console panel is mainly divided into four areas:

[0034] (1) The vacuum degree display area is equipped with a vacuum degree digital display instrument connected with the vacuum silicon tube to display the vacuum degree of the combustion chamber and the pump pipe during the vacuum pumping process.

[0035] (2) The gas injection pressure display area is equipped with a pressure digital display instrument connected with the pressure transmitter to display the gas pressure of the combustion chamber, the pump pipe and the separation section during the gas injection process.

[0036] (3) The touch screen operation area is equipped with a touch display operation screen connected with the pressure transmitter and the remote electric control valve to realize remote control of the combustion chamber and the pump pipe vacuum pumping and remote control of the combustion chamber and the pump pipe gas injection, wherein the gas injection can be set in manual and automatic modes.

[0037] (4) The button area is provided with a combustion chamber emergency exhaust button and a pump pipe emergency exhaust button, and the emergency exhaust button is switched on and off by controlling the gas control high-pressure valve stop valve on the emergency exhaust gas path. The emergency stop button is used to stop the gas injection process in emergency. The button is provided with a protective cover and cannot be touched under normal circumstances.

[0038] The control display integrated principle and component schematic diagram are shown in Figure 3 The communication is the connection hub of the entire network, and the PLC control unit is the core part of the entire control system. The electric control valve is the object of operation, the pressure transmitter can display the gas pressure in the barrel at the remote end and provide pressure data for automatic gas injection control. The man-machine interface is connected with the PLC through industrial communication.

[0039] In the description of the present specification, the terms "one embodiment" and "example" and the like mean that the specific features, structures or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the relative embodiment or example in a suitable manner.

[0040] It must be pointed out that the above description of the embodiments is not used for limitation but only for the purpose of helping to understand the core idea of the present application. Any improvement made by those skilled in the art without departing from the principles of the present application and the equivalent alternatives of the present product also belong to the protection scope of the claims of the present application.

Claims

1. A remote gas charging and discharging system for hydrogen-oxygen detonation driven two-stage light gas gun, for remote gas charging and discharging of the combustion chamber and pump tube of the two-stage light gas gun, characterized in that, The utility model relates to a kind of vacuum injection system, including: Valve assembly, including gas injection branch and emergency exhaust branch, be arranged in combustion chamber and pump pipe, for its vacuumizing, gas injection, exhaust, pressure measurement and remote control; Control system, by PLC controller realizes the remote operation control of gas injection process, exhaust process, and integrates gas injection pressure and each stage vacuum degree display function; The gas injection branch includes combustion chamber gas injection branch and pump pipe gas injection branch, wherein the combustion chamber gas injection branch includes combustion chamber hydrogen gas injection branch and combustion chamber oxygen gas nitrogen injection branch, and the pump pipe gas injection branch is pump pipe hydrogen gas injection branch;The emergency exhaust branch includes combustion chamber emergency exhaust branch and pump pipe emergency exhaust branch; Combustion chamber hydrogen gas injection branch, including high-pressure manual valve, high-pressure check valve, pneumatic high-pressure stop valve and high-pressure pressure reducing valve connected with hydrogen source, for combustion chamber hydrogen injection;High-pressure manual valve is directly connected with combustion chamber cavity, and high pressure is borne in cavity;High-pressure check valve and high-pressure manual valve cooperate, and pneumatic high-pressure stop valve is protected from being damaged; Combustion chamber oxygen gas nitrogen injection branch, including high-pressure manual valve, high-pressure check valve, solenoid valve and high-pressure pressure reducing valve connected with gas source, for combustion chamber oxygen injection and nitrogen injection; Combustion chamber emergency exhaust branch further includes flame arrester, branch is used for abnormal situation emergency exhaust, and combustion chamber emergency exhaust branch includes high-pressure manual valve and pneumatic high-pressure stop valve;Pressure monitoring device is arranged in combustion chamber emergency exhaust branch, and pressure change in combustion chamber inflation process is monitored, and high-pressure check valve is not arranged in combustion chamber emergency exhaust branch;High-pressure manual valve and pneumatic high-pressure stop valve are installed between the high-pressure manual valve and the pneumatic high-pressure stop valve in combustion chamber emergency exhaust branch, and the branch is installed with vacuumizing branch, and solenoid valve and bellows are connected to pump pipe vacuumizing system, for combustion chamber vacuumizing;Pressure transmitter is further installed between the high-pressure manual valve and the pneumatic high-pressure stop valve, for remote gas injection pressure monitoring and automatic gas injection control; Pump pipe hydrogen gas injection branch, including high-pressure manual valve, high-pressure check valve, pneumatic high-pressure stop valve and high-pressure pressure reducing valve connected with hydrogen source, pressure transmitter is installed between high-pressure manual valve and high-pressure check valve, for remote gas injection pressure monitoring and automatic gas injection control;High-pressure manual valve is directly connected with pump pipe cavity, and high pressure is borne in cavity;High-pressure check valve and high-pressure manual valve cooperate, and pneumatic high-pressure stop valve is protected from being damaged; Pump pipe emergency exhaust branch, including high-pressure manual valve, pneumatic high-pressure stop valve and flame arrester, for abnormal situation emergency exhaust and experimental combustion product gas exhaust, vacuumizing branch is installed between high-pressure manual valve and pneumatic high-pressure stop valve, and solenoid valve, resistance silicon, combustion chamber vacuumizing bellows, vacuumizing master control solenoid valve are installed, and vacuumizing master control solenoid valve is connected to vacuum pump through bellows after; Pump pipe emergency exhaust branch does not set high-pressure check valve.

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