A precision irrigation pipeline pressure regulation and protection device

Abstract

The invention discloses a precision irrigation pipeline pressure regulation protection device. The device comprises a valve inlet pipeline, a throttle cavity, a pressure regulation box, a pipeline output piping, a check valve, a return spring and a throttle orifice plate; a flow drainage hole is formed in the valve inlet pipeline and communicated with the input side of the pressure regulation box through the pipeline output piping, and the pipeline output piping is provided with the check valve; the throttle cavity is formed in the valve inlet pipeline and is a closed cavity, the lower half part of the throttle cavity is provided with a through-flow hole, and the through-flow hole overlaps with an inner ring of the valve inlet pipeline; the throttle cavity is internally provided with the throttle orifice plate, and the return spring is arranged between the inner wall of the top of the throttle cavity and the top of the throttle orifice plate; the output side of the pressure regulation box is communicated with a water inlet of the throttle cavity through an operation input piping; the water hammer impact of a valve piping in an irrigation distribution pipe network can be transferred, the flow of water entering the valve pipeline can be controlled, the continuous generation of the water hammer impact is prevented, and the pressure regulation and protection of the valve piping are achieved.

Description

technical field [0001] The invention belongs to the field of agricultural irrigation equipment, and specifically relates to a precision irrigation pipeline pressure regulating protection device, which is suitable for irrigation water distribution valve pipelines with large irrigation area, 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. 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 the optimal a...

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 multi-user irrigation districts with complex terrain, there is a lack of corresponding theoretical guidance and production practice, which makes the design of pipelines for multi-user random distribution irrigation districts difficult. The method is not clear, and the decision-making and control methods of pipeline water distribution are not clear, which affects the optimal water distribution in multi-user irrigation areas; valves are key components in the process of irrigation water distribution, because the design of the irrigation area pipe network is mostly based on the terrain and number of users in the irrigation area, especially in mountainous and hilly areas. The layout of the irrigation area pipe network is irregular, and the randomness and uncertainty of multi-user water distribution require frequent opening and closing of the valve body in the irrigation water pipeline, which causes 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 closing optimization 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 large-flow single-user water distribution system, and the effect of reducing the water hammer impact of the multi-user water distribution pipeline valve body is still insufficient Unclear; 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, In order to prevent the occurrence of water hammer, 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 adjustments cannot quickly respond to water. Hammer impact; variable frequency intelligent valve electric device (2007100725415), the device mainly uses the variable frequency drive module to drive the asynchronous motor to adjust the closing speed of the valve, although the device can effectively eliminate the "water hammer" phenomenon, for multiple users 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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