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Safety control method for preventing water hammer of synchronous multistage valve positioning large-diameter pipeline system

A large-diameter pipeline and valve positioning technology, which is applied in the direction of pump control, pipe components, pipes/pipe joints/fittings, etc., can solve the problems of water hammer pressure wave reduction and increase the complexity of the process, to save layout space, reduce costs, The effect of reducing losses

Active Publication Date: 2018-09-07
CHINA TIANCHEN ENG +1
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Problems solved by technology

When indirect water hammer occurs, the reduction and increase process of water hammer pressure wave is very complicated

Method used

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  • Safety control method for preventing water hammer of synchronous multistage valve positioning large-diameter pipeline system
  • Safety control method for preventing water hammer of synchronous multistage valve positioning large-diameter pipeline system
  • Safety control method for preventing water hammer of synchronous multistage valve positioning large-diameter pipeline system

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Embodiment Construction

[0060] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0061] The present invention proposes to control the water hammer by setting interlocking slow-closing valves at different positions (sensitive points of the piping system found through software simulation) and adjusting their working conditions. Through AFT software simulation calculation verification, it is found that reducing water hammer is feasible and effective. The generalization of the two-level interlocking method can be extended to a kind of safety control method for large-diameter pipeline system water hammer that analyzes, simulates, tests, locates, interlocks, and checks the system. Through process systematization, expand to use water hammer theory to predict and conduct preliminary engineering analysis, and use AFT-Impulse software to simulate and calculate, set up several interlocking slow-clo...

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Abstract

The invention discloses a safety control method for preventing a water hammer of a synchronous multistage valve positioning large-diameter pipeline system. The water hammer theory is utilized to conduct pre-judging and primary engineering analysis; a system model is built through AFT-Impulse software simulation; single-line simulation analysis or multiline simulation analysis is conducted, and a second-stage interlocking slow-closure type valve and multiple stages of interlocking slow-closure type valve are positioned according to the working condition; and the positioning and closing conditions are verified and corrected according to a calculation report, and specific measures are adopted. According to the safety control method, the large-diameter pipeline system is adopted as a researchobject, the engineering application value of the large-diameter pipeline system is embodied by combining the water hammer theory and AFT software simulation, and finally, a set of feasible preventative measures is established according to the simulated calculation result; and a method for solving the problem of sharp overpressure of a pump-stopping water hammer of a single-pump large-diameter pipeline system is provided, effective control over the water hammer under the situations of pump stopping of the single line in multiple pumps and simultaneous pump stopping of the multiple pumps is achieved, and one-key pump stopping in the accidental state is achieved.

Description

technical field [0001] The invention belongs to the field of industrial water hammer protection, in particular to a safety control method based on AFT-impulse simulation for synchronous multi-stage valve positioning of large-diameter pipeline system water hammer. . Background technique [0002] In the transportation system composed of pumping station pipelines, the unsteady flow process that occurs from a stable hydraulic state to another stable hydraulic state is called the hydraulic transition process of the pipeline system, that is, the water hammer phenomenon. A brief moment of water hammer can have serious consequences. In particular, the water hammer when the pump is stopped is very harmful, which will cause damage to the pipe fittings. In serious cases, the factory will be forced to stop production, the facilities will be washed away, and the equipment will be damaged by the water hammer pressure, resulting in economic losses and even accidents that endanger personal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/045F04B49/10G06F17/50
CPCF04B49/10F16L55/045G06F30/17
Inventor 王龙温鹏震欧阳帅
Owner CHINA TIANCHEN ENG
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