Metering control system, concrete spraying machine and metering control method

Abstract

The invention discloses a measure control system and a measure control method. The disclosed measure control system comprises a controller, a measure pump, a proportional flow valve and a hydraulic motor. The proportional flow value and the hydraulic motor are connected in a hydraulic oil path of a hydraulic system in series. The controller can control the hydraulic oil flux passing through the proportional flow valve according a preset rotate speed. A hydraulic motor output shaft is connected with the measure pump and can drive the measure pump to rotate. The disclosed measure control system also comprises a rotate speed sensor which is connected with the controller. The rotate speed sensor can outputs a rotate speed signal to the controller according to the rotate speed of the hydraulic motor. The controller can detect the actual rotate speed value of the hydraulic motor according to the rotate speed signal. The controller can judge whether the actual rotate speed value meets the preset requirement and changes the hydraulic oil flux passing through the proportional flow valve according to the judgement result. The measure control system and the measure control method provided by the invention are fit for the measure control towards liquid flux.

Description

technical field [0001] The invention relates to a metering control technology, in particular to a metering control system and a concrete wet spraying machine with the metering control system, and also to a metering control method. Background technique [0002] With the development of the current quantitative control technology, the metering control system has become a part of many equipment; for example, in the concrete wet spraying machine, there is a metering control system to control the flow of external additives. [0003] Concrete wet spraying machine is a construction equipment widely used in hydropower tunnels, underground powerhouses, subway engineering, railway tunnels, geotechnical engineering, military underground engineering and highway engineering. It generally includes a pumping system, an air compressor system, a metering control system, and a nozzle. The pumping system transports the ready-mixed concrete mixture in a certain proportion to the mixing chamber ...

AI Technical Summary

Problems solved by technology

[0006] Although the frequency conversion method can achieve the purpose of accurately controlling the flow rate of external additives, due to the use of frequency conversion method to control the flow rate, the above control system must be used in a working environment with AC power; it cannot be used in field operations or with only DC power. Although the DC power can be converted into AC power by means of inverter, this will undoubtedly increase the cost of the metering control system; in addition, due to the high cost of the frequency conversion instrument and the frequency conversion motor itself, the cost of the metering control system will be relatively high

Images