Low-temperature internal pressure automatic loading control system
A control system, automatic loading technology, applied in electrical program control, program control in sequence/logic controllers, and testing material strength by applying stable tension/pressure, which can solve the problem of high risk factor, human reading error, control problems such as low accuracy, to achieve the effect of high safety factor, fast automatic and fast control, and high control accuracy
Active Publication Date: 2015-01-21
BEIJING INST OF STRUCTURE & ENVIRONMENT ENG +1
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Problems solved by technology
However, this method has disadvantages: (1) The flow rate of the pressurization process is controlled by manually opening and closing the valve, which will produce unavoidable artificial reading errors, which will easily cause control errors caused by under-adjustment and over-adjustment of the valve, and also That is, the control accuracy is relatively low; (2) the risk factor is relatively high
If manual loading equipment is used, when the pipeline blasts, the splash of cryogenic liquid will pose a great hidden danger to the safety of loading personnel
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[0024] The present invention will be further described below with reference to the drawings and embodiments.
[0025] Such as figure 1 As shown, the low-temperature internal pressure automatic loading control system of the present invention includes a main control computer C1, PLC, a liquid nitrogen tank C2, a pressurized storage tank C3, a high-pressure nitrogen cylinder P, connecting pipelines J1 to J4, and a control communication cable L1 to L7, flow sensor S1~S2, pressure sensor S3~S4, sensor excitation power supply box, manual valve F1~F4, solenoid valve D1~D2; main control computer C1 is connected to PLC through control communication cable L7, and PLC through control communication cable L1 Connect with solenoid valve D2, manual valve F3, and pressurized storage tank C3 in turn; the sensor excitation power supply box is connected with PLC; one end of flow sensor S2 is connected between solenoid valve D2 and manual valve F3, and the other end is connected with control communic...
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The invention belongs to the technical field of aerospace structural strength, and particularly relates to a low-temperature internal pressure automatic loading control system. A master control computer C1 is connected with a PLC through a control communication cable L7, and the PLC is sequentially connected with an electromagnetic valve D2, a hand valve F3 and a pressure boost storage tank C3 through a control communication cable L1; a sensor excitation power supply box is connected with the PLC; one end of a flow sensor S2 is connected between the electromagnetic valve D2 and the hand valve F3, and the other end of the flow sensor S2 is connected with the sensor excitation power supply box through a control communication cable L3; the pressure boost storage tank C3 is connected with a high pressure nitrogen gas cylinder P through a connecting pipe J4, and an electromagnetic valve D1 and a hand valve F1 are sequentially arranged on the connecting pipe J4; the PLC is connected with the electromagnetic valve D1 through a control communication cable L2; one end of a flow sensor S1 is connected between the pressure boost storage tank C3 and the electromagnetic valve D1, and the other end of the flow sensor S1 is connected with the sensor excitation power supply box through a control communication cable L4. By means of the low-temperature internal pressure automatic loading control system, the pressure boost process and the pressure relieving process of a low temperature liquid nitrogen pipe at the lower temperature of -196 DEG C can be achieved.
Description
Technical field [0001] The invention belongs to the technical field of aerospace structural strength, and specifically relates to a low-temperature internal pressure automatic loading control system. Background technique [0002] The fuel tank of the launch vehicle uses a large amount of liquid hydrogen and liquid oxygen fuel. Therefore, the strength of the tank and pipeline under low temperature and high pressure, and the pressure it can withstand are very important for the safety and launch of the rocket, and the tank needs to be filled and pressurized through the pipeline before launch. Therefore, the strength and pressure resistance of the low-temperature pipeline of the storage tank need to be verified by the low-temperature static pressurization test. [0003] Currently, the low-temperature static test generally adopts manual control for the pipeline gas pressurization process. By manually controlling the opening of the valve, the gas flow and pressure are controlled. The p...
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IPC IPC(8): G05B19/05G01N3/18
CPCG05B19/05
Inventor 陈昊丁文祺葛鹏顾海贝王鸿博杨蓉刘彦毛毛丽娜
Owner BEIJING INST OF STRUCTURE & ENVIRONMENT ENG