An adaptive irrigation system pipeline water hammer impact reduction device

Abstract

A self-adaptive irrigation system pipeline water hammer impact reducing device, comprising a valve inlet pipeline (1), a reducer (4), and a water hammer response channel. The reducer (4) and the outer wall of the valve inlet pipeline (1) form a closed annular cavity; the edges of an isolating reinforcement plate (21) are respectively connected to the inner wall of the reducer (4) and the outer wall of the valve inlet pipeline (1); a pressure relief action block (8) is attached to the inner wall of the reducer (4) and the outer wall of the pipeline, the isolating reinforcement plate (21) and a first end surface of the pressure relief action block (8) form a pressure relief cavity, a water discharging port is formed in the pressure relief cavity, the isolating reinforcement plate (21) and a second end surface of the pressure relief action block (8) form an action cavity, and the water hammer response channel is in communication with the action cavity and an inner cavity of the valve inlet pipeline (1); a pressure relief hole (11) and a pipeline hole (18) are completely staggered under a normal water conveying state, and the pressure relief hole (11) is in communication with the pipeline hole (18) under a pressure relief state. The water hammer impact reducing device can actively respond the water hammer impact of a valve in an irrigation water distribution pipe network, effectively reduce the water hammer impact, guarantee the safety of key components of the irrigation water distribution pipe network, and improve the stability of an irrigation water distribution system, and is applicable to a multi-user random irrigation water distribution pipe network working condition.

Description

technical field [0001] The invention belongs to the field of agricultural irrigation equipment, and specifically relates to an adaptive irrigation system pipeline water hammer impact reduction device, which is suitable for irrigation water distribution valve pipelines with large irrigation areas, multiple water intake users, and random water intake for each user. Background technique [0002] my country is a large agricultural country, and agricultural water consumption accounts for 80% of the total water consumption, and the vast majority of agricultural water consumption is used for crop irrigation. However, the irrigation equipment in our country is far behind that of developed countries. The shortage of water resources has seriously affected the healthy development of local industry and agriculture, and also affected the safety of domestic water in local cities. In recent years, with the development of the national economy and society, the overall development trend of th...

AI Technical Summary

Problems solved by technology

The pipe network design for single-user irrigation districts is relatively simple and relatively mature, but for the design and planning of water distribution pipelines for complex multi-user irrigation districts, there is a lack of corresponding theoretical guidance and production practice, making the pipeline design method for multi-user random water distribution irrigation districts unclear , and the decision-making and control methods of pipeline water distribution are unclear, which affects the optimal water distribution in multi-user irrigation areas; valves are key components in the process of irrigation water distribution. There are certain irregularities in the layout of the network, and the randomness and uncertainty of multi-user water distribution require frequent opening and closing of the valve body in the irrigation water pipeline, resulting in the water hammer effect of key components in the pipeline. The research on the water hammer effect in the multi-user water distribution pipeline is not yet clear, and further research is needed to ensure the safety of the water delivery pipeline in the multi-user irrigation area

[0004] At present, the relevant patents related to the reduction of water hammer in valve pipelines include: Valve Closure Optimal Control Method for Transition Process of Long-distance Large-flow Water Delivery System (2017100763425). At the same time, the trial algorithm is used to find the feasible region interval, and the optimal interval search method is used to obtain the optimal feasible region. However, this method is aimed at the water distribution system with large flow and single user, and it is not clear how to reduce the water hammer impact of multi-user valve bodies; A slow-speed electric valve control method and its control device (2012102812885), the device achieves the purpose of adjusting the motor speed of the electric valve and the running time of the switching process by installing a pulse time relay in the control box, so as to prevent water Hammer phenomenon, this method can avoid the burning of electric valves, but for multi-user irrigation systems, the randomness of irrigation water distribution system changes is relatively large, and electric valves with slow speed adjustment may not be able to meet the randomness of multi-user water distribution requirements; variable frequency intelligent valve electric device (2007100725415), the device mainly uses the variable frequency drive module to realize the drive of the asynchronous motor to adjust the closing speed of the valve, although the device can effectively eliminate the "water hammer" phenomenon, for multi-user As far as the complex water distribution system is concerned, the adaptability of the frequency conversion intelligent valve from the detection of water hammer impact to the realization of frequency conversion control is poor. , the use of this device increases the burden on agricultural production

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