Device and method for comprehensively controlling and protecting pump set of diesel engine

Abstract

The invention relates to a device and a method for comprehensively controlling and protecting a pump set of a diesel engine, which are applied to the comprehensive control and protection of the pump set of the emergency / fire-fighting diesel engine. The device comprises a core operation unit, a signal output unit, a signal input and processing unit and a communication protocol conversion unit; a first single chip machine is connected with the diesel engine, a host computer and an LCD screen; and the first singlechip is also connected with a second singlechip. The method orderly comprises the following steps of self-test, start, process control of the operation of the machine set, state check in the operation of the machine set, control of shutdown of the machine set and completion. The control system has the advantages of high accuracy, strong emergency treatment capability for timely alarm control, low cost, high cost-performance ratio, small volume, simple structure, convenient use and high degree of automation; and the control and protection method can timely and accurately judge various faults occurring during the operation of the machine set and alarm, and make the automatic and accurate control, and the control program is reasonable, simple and reliable.

Description

technical field [0001] The invention relates to a comprehensive control and protection device and a control and protection method of a diesel engine water pump unit, belonging to the technical field of control in an electric system, and is particularly suitable for the comprehensive control and protection of an emergency / fire-fighting diesel engine water pump unit using an electric injection diesel engine. Background technique [0002] The existing control and protection system of diesel engine water pump unit, especially the control and protection system of emergency / fire fighting diesel engine water pump unit, all use small programmable logic controller (PLC) as the core control unit, external diesel engine lubricating oil pressure signal, water temperature signal, speed Signal, water pump bearing temperature signal and other detection signals, as well as operation mode selection, unit start, unit stop, fault reset and other knob operation signals are connected to the PLC, ...

AI Technical Summary

Problems solved by technology

[0003] The existing diesel engine water pump unit control system does not have the function of communicating with the EFI diesel engine’s own controller. The control and protection methods cannot read the parameters and codes related to the diesel engine’s operating status and fault diagnosis information in the EFI diesel engine’s own controller. Therefore, the existing control system cannot accurately control the diesel engine water pump unit, and cannot accurately and timely judge various faults and alarms that occur during the operation of the unit. Diagnose after reading the information in the computer, the whole process is time-consuming and laborious, and even causes large property losses

[0004] Since the existing brand PLCs are standardized products produced in batches, when the external input signal does not conform to the format of the PLC input template, it must be converted by other devices before it can be connected to the PLC input template. In the control of the existing diesel engine water pump unit In the system, it is necessary to use a special diesel engine speed signal conversion device, a low battery voltage alarm device, etc., which increases the cost

[0005] In addition, the existing control cabinet for the diesel engine water pump unit is relatively large and cannot be conveniently placed on the body of the diesel engine water pump unit, thus making the unit occupy a large area at the site of use

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