Tapered valve, tapered siphon breaking valve and control method of valves

A gradual change and destruction valve technology, which is applied in the direction of valve lift, valve detail, valve device, etc., can solve the problems of unit vibration rate and pump shaft displacement exceeding, long distance, large water level drop, etc.

Pending Publication Date: 2018-05-15
SHANGHAI SHENGJIANG MECHANICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to geographical limitations of some large pumping stations, the distance between the hump point of the siphon pipe and the main engine of the water pump is too long, and the water level drop is relatively large. Huge water hammer phenomenon...

Method used

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  • Tapered valve, tapered siphon breaking valve and control method of valves
  • Tapered valve, tapered siphon breaking valve and control method of valves
  • Tapered valve, tapered siphon breaking valve and control method of valves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 9

[0080] In Embodiment 9, a control method of a gradual siphon breaker valve includes the steps of:

[0081] S100, monitoring the air pressure value in the water chamber;

[0082] S200, judging whether the air pressure value is within a preset range;

[0083] When the air pressure value is within the preset range value, perform the steps:

[0084] S210, the electromagnetic transmission component does not move;

[0085] When the air pressure value exceeds the preset range value, perform steps:

[0086] S220, the electromagnetic transmission component controls the second valve to connect the water cavity and the air cavity.

[0087] In this embodiment, it is mainly used to monitor the vacuum degree in the pipeline when the pump set is shut down (that is, in the non-operating state). It can be real-time monitoring or interval monitoring, and the PLC control system is used to control the conduction or sealing of the electromagnetic transmission components. Between the cavity or ...

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Abstract

The invention discloses a tapered valve, a tapered siphon breaking valve and a control method of the valves. The tapered valve comprises a normally open valve, a first valve and a selection mechanism,an air cavity of the siphon breaking valve is communicated with an atmospheric environment through the normally open valve, and the selection mechanism controls the working state of the first valve to adjust ventilation capacity between the air cavity and the atmospheric environment. The working state of the tapered valve can be automatically adjusted according to the working state of a pump unit, so that the requirements of the pump unit in different working states are met, the working states of the pump unit are optimized, the running efficiency of the pump unit is improved, running stability of the pump unit is improved, running noise of the pump unit is reduced, the service life of the pump unit is prolonged, and the tapered valve has good practicability, applicability and market prospect.

Description

technical field [0001] The invention relates to the technical field of siphon breaking, in particular to a gradual change valve, a gradual change siphon breaking valve and a control method thereof. Background technique [0002] When the water pump units using siphon pipelines such as hydropower stations, dock pump stations, urban drainage pump stations, sewage discharge pump stations, and thermal power stations are shut down in normal operation or in an accident, the siphon breaker valve is used to destroy the siphon phenomenon in the pipeline. The water in the pipeline is diverted and retreated, so that the main unit can stop in time and smoothly. If the siphon breaking valve cannot automatically open the valve in time to break the siphon phenomenon when it is shut down, the high water level water will flow back and the pump unit will reverse at a high speed, and even cause the impeller to fly away. Therefore, the siphon breaking valve is one of the important equipment to p...

Claims

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Application Information

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IPC IPC(8): F16K1/00F16K31/06F16K31/11
CPCF16K1/00F16K31/0655F16K31/0675F16K31/10
Inventor 李孙龙李公望
Owner SHANGHAI SHENGJIANG MECHANICAL EQUIP
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