Hydraulic control system with effect of closed loop detection on actual situation of sealing of plunger type sludge pump

Abstract

A hydraulic control system with the effect of closed loop detection on the actual situation of sealing of a plunger type sludge pump comprises a first main oil cylinder, a second main oil cylinder, an oil supplementing device and a monitoring and control device, wherein a rod cavity of the first main oil cylinder and a rod cavity of the second main oil cylinder are in series connection to form a communicating cavity; the oil supplementing device comprises an oil supplementing box, a servo hydraulic cylinder, an oil feeding control valve, an oil return control valve, a hydraulic pump and a flow control valve; one end of the servo hydraulic cylinder is connected with the communicating cavity while the other end of the servo hydraulic cylinder is successively connected with the flow control valve, the oil feeding control valve, the hydraulic pump and the oil supplementing box to form an oil supplementing line; and the oil return control valve is respectively connected to the servo hydraulic cylinder, the oil supplementing box and the oil feeding control valve to form an oil return line. The hydraulic control system has the advantages that an oil supplementing process of the system is in a closed loop, is controllable, and is fed back in time, the actual situation of sealing in the plunger type sludge pump can be early warned, a sealing state of a pumping system is accurately detected and fed back, and efficient and reliable running of the pumping system is realized.

Description

technical field [0001] The invention relates to the technical field of sludge pumping hydraulics, in particular to a hydraulic control system capable of closed-loop detection of the sealing status of a plunger type sludge pump. Background technique [0002] The plunger sludge pumping system has been popularized in the field of sludge treatment and disposal due to its excellent performance such as large conveying capacity, long conveying distance, and good process airtightness. However, due to the high viscosity and strong corrosion characteristics of the conveying medium, the working environment of the hydraulic power source of the sludge pumping system is harsh and the work intensity is high. After the system has been working for a period of time, the sealing structure will be damaged to varying degrees and the resulting damage For different degrees of leakage, if the real-time monitoring of the sealing process is not implemented, the early warning function of the equipment...

AI Technical Summary

Problems solved by technology

However, due to the high viscosity and strong corrosion characteristics of the conveying medium, the working environment of the hydraulic power source of the sludge pumping system is harsh and the work intensity is high. After the system has been working for a period of time, the sealing structure will be damaged to varying degrees and the resulting Different degrees of leakage, if the real-time monitoring of the sealing process is not implemented, the early warning function of the equipment will not be implemented or even affect the normal operation of the equipment

[0003] Among the disclosed similar technologies, the Chinese patent document with the publication number CN201210243916 discloses a hydraulic oil replenishment system for the pumping mechanism of construction machinery, but the oil replenishment circuit involved in this patent has certain defects: when the pumping system is empty When running at full load or not at full load, the pressure in the rod chamber is higher than the pressure in the rodless chamber, resulting in the loss of the oil replenishment function; at the same time, the system lacks oil volume overfill control, which may easily cause the two cylinders to be out of sync; the oil replenishment process is extensive and cannot be effectively controlled Closed-loop monitoring of system sealing status

At the same time, there is no similar control technology for sealing monitoring in the hydraulic working process in the field of sludge pumping systems

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