Protecting device for forward water hammer

Abstract

The invention discloses a protecting device for a forward water hammer, which comprises a main body device and an automatic control system, wherein the main body device comprises a straight pipe, a buffer pipe, a connection pipe, an air valve, a pressure fluctuation pre-stop valve, a drain pipe, an air supply pipe and an air supply gate valve; the two ends of the buffer pipe are sealed and blocked; the buffer pipe is above the straight pipe; a lateral wall at the middle part of the buffer pipe is connected with the lateral wall at the middle pipe of the straight pipe through a connection pipe; the air valve is arranged on the buffer pipe; the drain pipe is arranged on the lateral wall of the buffer pipe through the pressure fluctuation pre-stop valve; the air supply pipe is arranged on the lateral wall of the buffer pipe through the air supply gate valve; the automatic control system comprises a pressure transmitter, a control box, a control cable and a signal cable; the pressure transmitter is arranged at a water outlet end of the straight pipe, and the pressure transmitter and the pressure fluctuation pre-stop valve are respectively connected with the control box through the signal cable and the control cable. According to the protecting device for the forward water hammer, the forward water hammer is effectively protected or weakened; particularly, the protecting device forthe forward water hammer is suitable for a long-distance water pipeline, and has the characteristics of being effective in protection, simple in structure, easy in production, convenient in installation, safe and stable, small in floor area, less in investment and the like.

Description

technical field [0001] The invention belongs to the technical field of forward water hammer protection equipment for long-distance water delivery pipelines, and relates to a forward water hammer protection device, in particular to a forward water hammer protection device combining equipment, facilities and automatic control. Background technique [0002] The flow allocation problem of large-flow and long-distance water pipeline projects is very complicated. Various on-off valves or flow adjustment operations during operation often cause water hammer in the pipeline, which is mainly manifested in positive water hammer when the valve is closed: that is, when the valve is closed When it will cause the change of the flow rate, the pressure will fluctuate accordingly. The water hammer mainly comes from the fluctuation of the local resistance of the valve and the resistance along the pipeline, and the pressure fluctuation caused by it is the largest in the front section of the val...

AI Technical Summary

Problems solved by technology

The one-way supply water tank or surge tower is strictly limited by water pressure and engineering conditions due to its large area and high investment; the air pressure tank is used in a system with a large diameter due to its large volume. One-time investment and later operation costs; ordinary pressure relief valves are often used as the main tool for secondary protection, but a large number of practices have proved that when water hammer occurs and the pressure rises instantly, the reaction speed cannot keep up with the rapid pressure wave. It cannot be opened in time, resulting in the inability to effectively solve the water hammer; the pressure fluctuation check valve is superior to the ordinary pressure relief valve in protecting the positive water hammer, and the response is more sensitive, but it still has the same disadvantages as the ordinary pressure relief valve mentioned above

The above water hammer protection measures are effective in specific situations, but are often limited by water pressure requirements and engineering conditions due to their own characteristics

Images