Multi-stage pump starting method, system and equipment

Abstract

The invention discloses a multi-stage pump starting method, system and equipment. The method comprises the steps that after a multi-stage pump is started and vacuumized, vacuum degree data at a formermoment and vacuum degree data at a later moment at the interval of a preset time period are collected; a difference value of collected vacuum degrees at the former moment and the later moment is compared with a preset threshold value, and the situation that the difference value of the vacuum degrees is smaller than the preset threshold value is recorded; and when the frequency of occurrence of the situation that the difference value of the vacuum degrees is smaller than the preset threshold value reaches a preset frequency, the multi-stage pump starts a water pump motor. According to the scheme, the real-time vacuum degree of a pump body is read mainly through a sensor, the vacuum degree at the former moment is continuously compared with the vacuum degree at the current moment in a programmable controller to judge whether the vacuum degree reaches the limit and meets the pump body starting condition or not, and therefore the phenomenon that water cannot be fed due to the misjudgment that the vacuum degree of the pump body meets the pump starting condition is effectively avoided; and meanwhile, the method is suitable for automatic control, errors caused by manual observation are avoided, manpower resources are liberated, and the labor cost of an enterprise is reduced.

Description

technical field [0001] The invention belongs to the technical field of coal mine production equipment control, and in particular relates to a multistage pump starting method, system and equipment thereof. Background technique [0002] In the drainage process of the mine pump room, the most commonly used is the multi-stage pump. Before starting the pump body, it is necessary to vacuumize the pump body to fill in the diversion water, so as to meet the conditions for starting the pump. The common methods for judging the conditions for starting the pump are as follows: (1) Manually observe the mechanical negative pressure gauge. If the pointer shakes rapidly, it means meeting the conditions for starting the pump, but it cannot be used in automatic control; (2) Check the water level of the water tank through the sensor. Measurement, calculate the dynamic vacuum degree in the program, measure the negative pressure of the pump body through the sensor, read the real-time vacuum degr...

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Problems solved by technology

The common methods for judging the conditions for starting the pump are as follows: (1) Manually observe the mechanical negative pressure gauge. When the pointer shakes rapidly, the condition for starting the pump is met, but it cannot be used in automatic control; (2) Check the water level of the water tank through the sensor. Measurement, calculate the dynamic vacuum degree in the program, measure the negative pressure of the pump body through the sensor, read the real-time vacuum degree of the pump body in the program, and judge whether the vacuum degree is based on the comparison between the calculated dynamic vacuum degree and the real-time vacuum degree The condition of starting the pump is met, but the disadvantage is that the calculated data is often misjudged under the interference of factors such as the fluctuation of the water level of the water tank and the large errors in the calculation process, and the phenomenon that the water cannot be supplied or the pump cannot be started.

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