CN201253441Y

CN201253441Y - Fire engine water-pump voltage-stabilization control system

Info

Publication number: CN201253441Y
Application number: CNU200820218030XU
Authority: CN
Inventors: 王殿生
Original assignee: Shenyang Jietong Fire Truck Co Ltd
Current assignee: Shenyang Jietong Fire Truck Co Ltd
Priority date: 2008-09-18
Filing date: 2008-09-18
Publication date: 2009-06-10
Anticipated expiration: 2018-09-18

Abstract

The utility model provides a water pump steady pressure control system for a fire-fighting vehicle, which comprises an engine gasoline throttle control device arranged on a chassis of the fire-fighting vehicle and a water pump, wherein the engine gasoline throttle control device is connected with a gasoline throttle of an engine of the fire-fighting vehicle, and the water pump is connected with the engine of the fire-fighting vehicle. The control system is characterized in that a control motor is connected on the engine gasoline throttle control device and is connected with a motor driving machine connected to a PLC; a pressure sensor is connected on the water pump and is connected to the PLC ; and an operation panel is also connected on the PLC. The water pump steady pressure control system for the fire-fighting vehicle has the advantages of simple and reasonable structure, high practicability, easy operation and installation, great increase of fire-fighting efficiency and enhanced safety of fire-fighting operating personnel and can be easily popularized and applied to the field of fire fighting.

Description

Fire fighting truck water pump voltage stabilizing control system

Technical field: the utility model relates to a kind of fire fighting truck water pump voltage stabilizing control system that is applied on the fire fighting truck.

Background technology: at present, in the fire fighting truck field in the process of implementing fire fighting or rescue, fire-fighting lance is connected with water pump usually, and water pump connects the water source, thereby water pump drives by engine and control the output pressure that engine speed is controlled water pump by the engine oil controlling device for doors; And run into the situation that needs a plurality of hydraulic giants to spray simultaneously through regular meeting in the actual work, and when a plurality of hydraulic giants used simultaneously, the increase of flow can make the water pump internal pressure diminish, and made the jet power of each hydraulic giant diminish, cause insufficient pressure, and then influence fire-fighting efficient; And when a plurality of hydraulic giants are used simultaneously, when turning off a plurality of hydraulic giant wherein suddenly, causing the water pump internal pressure to increase suddenly, the fire fighter who causes holding the hydraulic giant of not closing occurs dangerous under the impact of pressure; Situations such as fracture, water pump fault, flexible pipe come off occur at fire main in addition and also can cause the hydraulic pressure shakiness constantly, and guarantee the stable water pressure of fire main, adjust the problem that pressure becomes a needs solution in fire-fighting fire extinguishing field in time, exactly.

Summary of the invention:

Goal of the invention: the utility model provides a kind of fire fighting truck water pump voltage stabilizing control system, its objective is the hypodynamic problem of injection that solution unsafe problem of operating personnel that the increase suddenly of the loine pressure of fire main caused in the fire-fighting fire extinguishing process in the past and pressure reduce to cause.

Technical scheme: the utility model is achieved through the following technical solutions:

A kind of fire fighting truck water pump voltage stabilizing control system, comprise the engine oil controlling device for doors and the water pump that are arranged on the fire fighting truck chassis, the engine oil controlling device for doors is connected with the throttle of fire fighting truck engine, water pump is connected with the fire fighting truck engine, it is characterized in that: be connected with the control motor on the engine oil controlling device for doors, the control motor is connected with the motor-driven machine, and the motor-driven machine is connected to the PLC controller; Water pump is connected with pressure sensor (6), and pressure sensor is connected to the PLC controller; Also be connected with operation panel on the PLC controller.

Also be connected with speed probe by circuit on the PLC controller, speed probe is connected to automobile engine.

Advantage and effect: the utility model provides a kind of fire fighting truck water pump voltage stabilizing control system, it has increased pressure sensor and speed probe on the basis of original water pump and engine oil controlling device for doors, pressure sensor is arranged on the water pump, its inductive probe puts in water pump, it adopts inside to be provided with the form of deformable membrane, gathers the information that pressure changes according to the variation of the diaphragm that variation caused of pressure; Speed probe is arranged on the engine; Pressure sensor is gathered the information that the water pump internal pressure changes intuitively, and speed probe then changes the variation Information Monitoring indirectly of the engine speed that is caused by water-aspirator pressure; Work by two sensors is given the PLC controller with the feedback information that the pressure in the water pump changes, export by information again, utilize motor-driven machine and control motor to adjust the revolution that the engine oil controlling device for doors is controlled engine according to the variation of hydraulic pressure, and then the pressure of adjustment water pump, thereby make the pressure in the water pump keep stable normally the carrying out of fire-fighting fire extinguishing work that guarantee.

This fire fighting truck water pump voltage stabilizing control system, reasonable, practical, operation simple installation simple for structure improves the efficient of fire-fighting fire extinguishing greatly, increases fire-fighting operation personnel's safety coefficient, is beneficial in the fire-fighting fire extinguishing field and applies.

Description of drawings:

Fig. 1 is an overall structure schematic diagram of the present utility model;

Fig. 2 is a structured flowchart of the present utility model;

Fig. 3 is for showing the block diagram of PLC controller internal hardware structure of the present utility model.

The specific embodiment: the utility model is done nearly step explanation below in conjunction with accompanying drawing:

As shown in Figure 1, the utility model provides a kind of fire fighting truck water steady pump pressure control system, comprise the engine oil controlling device for doors 4 and the water pump 5 that are arranged on the fire fighting truck chassis, engine oil controlling device for doors 4 is connected with the throttle of fire fighting truck engine, by the revolution of engine throttle control, thus control water pump 5; Water pump 5 is connected with the fire fighting truck engine, is connected with control motor 3 on the engine oil controlling device for doors 4, and control motor 3 is adjusted the variation of engine oil controlling device for doors 4; Control motor 3 is connected with motor-driven machine 2, and motor-driven machine 2 drives 3 runnings of control motor; Motor-driven machine 2 is connected to PLC controller 1 by circuit; Water pump 5 is provided with pressure sensor 6, the probe of pressure sensor 6 puts in the water pump inner chamber with detected pressures, its operation principle is existing diaphragm type pressure sensor, promptly be provided with deformable diaphragm in the probe, the variation of pressure can cause the protrusion of diaphragm or recessed distortion, thereby obtains the information that pressure changes; Pressure sensor 6 is connected to PLC controller 1 by circuit; Also be connected with operation panel 7 on the PLC controller 1; Operation panel 7 comprises the button that switch is set, automatic mode is set, pressure is set and manual mode is set, and it is responsible for the startup of device and closes and change under various patterns; On engine, also be connected with speed probe 8, speed probe 8 is by detecting the revolution of engine, and then the pressure that detects indirectly in the water pump 5 changes, the pressure that speed probe 8 and pressure sensor 6 are monitored water pump simultaneously changes, speed probe 8 is indirect detection, and pressure sensor 6 is direct detections; Its benefit is that another sensor can guarantee the normal operation of whole system when any one faulty sensor wherein.

Operation panel 7, pressure sensor 6, speed probe 8 all are connected to the input port of PLC controller 1, and motor-driven machine 2 is connected to the output port of PLC controller 1.

As shown in Figure 3, include input port, output port, CPU, power supply, I/O expansion interface in the PLC controller, and parts such as external apparatus interface, memory.

When needs use fire fighting truck water pump voltage stabilizing control system of the present utility model, the fire fighting truck engine is switched to the fire-fighting work state from the driving duty, the gear of fire fighting truck is hung to neutral gear, start this fire fighting truck water pump voltage stabilizing control system then, after powering on, this system at first PLC controller 1 is carried out an initialization, comprise hardware initialization, the I/O block configuration checks that the power failure hold in range is set and other initialization process.

Water pump 5 is connected to fire fighting truck water pot or external water source, allow engine drive water pump 5 runnings then, when water pump 5 runnings, the duty of this used in fire-fighting pump pressure control system detection system pressure and water pump 5, under water pump 5 situation working properly, be sent in the PLC controller 1 by pressure sensor 2 or speed probe 8 sampling current pressure values or revolution value and store; When water pump 5 water flows change, for example: when needing to increase spray gun, intrasystem pressure no doubt can diminish in moment, at this moment, pressure sensor 6 or speed probe 8 will be counted ground soon and give PLC controller 1 with the feedback information that pressure diminishes, PLC controller 1 is controlled motor driver 2 according to the revolution value of previous sampling and pressure of setting or engine by output port, make motor driver 2 drive 3 work of control motor, thereby allow control motor 3 order about engine oil controlling device for doors 4 and increase the revolution of engine with the increase of control water pump 5 internal pressures, pressure sensor 6 or speed probe 8 can momentarily gather pressure or the revolution value is passed PLC controller 1 back in increasing the process of pressure, when the pressure of gathering or revolution value and the value of storing in advance reach when equating, stop to increase pressure, it is certain that engine revolution keeps, thereby guarantee the pressure balance in the water pump 5, make the pressure of system keep certain; And system also can reduce the revolution of engine automatically by PLC controller 1 when needing to reduce spray gun, thereby makes the pressure of water pump 5 diminish, and then guarantees the pressure balance of whole system; And when water pipe fracture, water pump fault, flexible pipe occurring and situation such as come off, pressure sensor 6 can convey to PLC controller 1 with pressure changing, PLC controller 1 will be adjusted the revolution of engine, for example makes it become idling mode, in order to avoid cause equipment and personnel's injury; More than process maximal regulated time of each adjustment only be 3 seconds, quick, accurately; This fire fighting truck water pump voltage stabilizing control system can preestablish force value in addition, and whole system is moved according to pre-set pressure then, and remains on pre-set force value according to the pressure that whole system is in time adjusted in the variation of pressure; This fire fighting truck water pump voltage stabilizing control system can adopt manual operation mode and automatic operation mode, start the button of manual mode when selecting manual operation mode, device enters manual mode, at this moment, pressure-button by rotary manipulation plate 7 is constantly to the change information of PLC controller 1 input pressure as required, just utilize the size of manually adjusting pressure, when the manual value with pressure is little by little transferred when big, PLC controller 1 can be followed manual adjustments and synchronously be utilized engine oil controlling device for doors 4 that engine revolution is become big, increase pressure, in like manner, when the value of pressure was little by little turned down, device can synchronously diminish engine revolution gradually, reduces pressure, its principle is analogous to the control accelerator pedal of automobile, and promptly can adjust the revolution of engine along with the operation that increases or reduce throttle; And when turning off the manual mode button and withdrawing from manual mode, PLC controller 1 can be adjusted to idling with engine revolution; When starting automatic mode, whether PLC controller 1 is normal according to the automatic detected pressures of force value of gathering in advance or setting by pressure sensor 2 and speed probe 8, if pressure is undesired, PLC controller 1 can be adjusted the pressure of whole system to constant by motor-driven machine 2, control motor 3 and engine oil controlling device for doors 4 automatic adjusting engine revolutions according to predefined force value.

This fire fighting truck water pump voltage stabilizing control system, reasonable, practical, operation simple installation simple for structure, good reliability improves the efficient of fire-fighting fire extinguishing greatly, increases fire-fighting operation personnel's safety coefficient, is beneficial in the fire-fighting fire extinguishing field and applies.

Claims

1, a kind of fire fighting truck water pump voltage stabilizing control system, comprise the engine oil controlling device for doors (4) and the water pump (5) that are arranged on the fire fighting truck chassis, engine oil controlling device for doors (4) is connected with the throttle of fire fighting truck engine, water pump (5) is connected with the fire fighting truck engine, it is characterized in that: be connected with control motor (3) on the engine oil controlling device for doors (4), control motor (3) is connected with motor-driven machine (2), and motor-driven machine (2) is connected to PLC controller (1); Water pump (5) is connected with pressure sensor (6), and pressure sensor (6) is connected to PLC controller (1); Also be connected with operation panel (7) on the PLC controller (1).

2, fire fighting truck water pump voltage stabilizing control system according to claim 1, it is characterized in that: also be connected with speed probe (8) by circuit on the PLC controller (1), speed probe (8) is connected to automobile engine.