Fluid level control measuring systems used for gas dynamic type pulse fluidic jet pump and method thereof
A liquid level control and liquid jet technology, applied in liquid level control, control/regulation system, non-electric variable control, etc., can solve problems such as liquid overflow and piston cylinder entry, and achieve the effect of avoiding personal injury
Inactive Publication Date: 2009-07-29
TSINGHUA UNIV
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Problems solved by technology
[0004] In the above working process of the pneumatic pulse liquid jet pump, if the operation is improper, high-pressure gas may be pressed into the follow-up unit during pressing, and the liquid may overflow the piston barrel and enter the top gas pipeline during suction, which is dangerous when transporting fluid. sexual situations, especially radioactive ones, could have very serious consequences
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[0043] The first liquid level control measurement system proposed by the present invention, such as figure 2 As shown, the liquid level control measurement system includes a piston barrel 3, a low level liquid level limit measurement and control tube 8 arranged in the piston barrel, a low level differential pressure sensor 9, a D / A converter 11, a data collection system 12 and a user terminal workstation 13 The low-level liquid level limit measurement and control tube 8 is connected to the high-pressure end of the low-level differential pressure sensor 9, and the low-pressure end of the low-level differential pressure sensor is connected to the top of the piston barrel; the signal of the low-level differential pressure sensor The output is connected to the A / D data collection system 12 through a signal line; the top of the piston cylinder 3 is respectively connected to a high-pressure air circuit 16 and an air discharge circuit 17 through an outlet, and a first solenoid valve ...
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A liquid level control and measurement system and method used in a pneumatic pulsed liquid jet pump. The system comprises a piston cylinder, a high liquid level limit and a low liquid level limit measurement and control tube, a low level and a high level differential pressure sensor, a D / A converter, a data collection system, and a user terminal workstation. When a differential pressure signal between the low liquid level limit measurement and control tube and the piston cylinder generates a V-type step, the low liquid level limit is reached; when the differential pressure signal between the high liquid level limit measurement and control tube and the piston cylinder generates a step signal from zero, the high liquid level limit is reached, and the practical liquid level in the piston cylinder is calculated according to the differential pressure signals between the low liquid level measurement and control tube and the piston cylinder. The liquid level control and measurement system of the invention is not provided with mechanic moving parts and can realize remote control and well satisfies the control requirements of the high liquid level limit and the low liquid level limit in the piston cylinder of the pneumatic pulsed liquid jet pump, thereby sufficiently reducing the repair need in dangerous circumstances, and ensuring the safety of the repair staff and the operation staff.
Description
technical field [0001] A liquid level control system and method for a pneumatic pulse liquid jet pump belongs to the technical field of fluid delivery, liquid level measurement and monitoring, and can be used for liquid level limit control and liquid level height when transporting corrosive, toxic, radioactive and other dangerous fluids measurement and monitoring. Background technique [0002] In chemical, energy, mining and other industrial production, it often involves the transportation of corrosive, toxic and dangerous fluids. For ordinary mechanical fluid pumping equipment, due to the existence of movable parts, the equipment will have to be regularly repaired and replaced after long-term operation. In the case of transporting fluids that are harmful to people, such operations are inevitable. It will bring danger to operation and maintenance personnel. This problem is especially acute in the field of nuclear energy production due to the ubiquitous radioactivity of the...
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IPC IPC(8): G05D9/12
Inventor 徐聪景山吴秋林
Owner TSINGHUA UNIV