CN204692067U - Single water pump pressure changeable control system - Google Patents
Single water pump pressure changeable control system Download PDFInfo
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- CN204692067U CN204692067U CN201520195460.4U CN201520195460U CN204692067U CN 204692067 U CN204692067 U CN 204692067U CN 201520195460 U CN201520195460 U CN 201520195460U CN 204692067 U CN204692067 U CN 204692067U
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Abstract
The utility model discloses a kind of single water pump pressure changeable control system, comprise flow control valve, spray control valve, watering pump drive motor, watering pump; Pressure oil enters spray control valve after flow control valve metering, controls the uninterrupted of the pressure oil entering watering pump drive motor through spray control valve; Watering pump is driven to rotate by pump drive motor of sprinkling water and absorbs water from water tank, and water is entered sprinkler system; Sprinkler system realizes switching watering between high pressure water circuit and low pressure waterway.The theoretical foundation of design is the law of conservation of energy of working fluid, realizes the coupling of pressure versus flow by changing passage section.The manually ball valve commutation of this system, realizes high pressure watering loop and low pressure and to sprinkle water the switching in loop.High-low circuit, by changing cross-sectional flow area, alter pressure and flow velocity, realizes high low pressure pressure changeable and controls.This design cost is low, and reliability is high; The complexity of system can be reduced cleverly, improve working life and improving product stability.
Description
Technical field
The utility model relates to a kind of single water pump pressure changeable control system, belongs to spray control technical field.
Background technique
Pavement milling machine is the special mechanical equipment of highways and urban roads maintenance work, the excavation being mainly used in the asphalt concrete pavements such as highway, airport, harbour, parking lot is overhauled, the removing of the pavement diseases such as asphalt pavement rut, be full of cracks, carbuncle bag, pavement markers, the plucking of cement pavement and the milling equality operation of surface layer faulting of slab ends; Big-and-middle-sized milling machine is for meeting construction demand, and sprinkler system adopts high low pressure two to overlap sprinkler system.Low service system is for meeting the cooling dedusting of cutting operation, and high-pressure system is for cleaning complete machine.Traditional design proposal, adopt high low pressure two to overlap independent driving system, cost high control system is complicated, and rate of fault is corresponding higher.
Model utility content
For above-mentioned existing issue, the utility model provides a kind of single water pump pressure changeable control system, meets cooling dedusting and high pressure washing two kinds of function requirements, reduces design cost, reduces the fault point.
To achieve these goals, the technical solution adopted in the utility model is:
Single water pump pressure changeable control system, is characterized in that, comprises flow control valve, spray control valve, watering pump drive motor, watering pump;
Pressure oil enters spray control valve after described flow control valve metering, controls the uninterrupted of the pressure oil entering watering pump drive motor through spray control valve;
Described watering pump is driven by described watering pump drive motor and rotates, and absorbs water, and water is entered sprinkler system when described watering pump rotates from water tank;
Described sprinkler system realizes switching watering between high pressure water circuit and low pressure waterway.
Described low pressure waterway comprises the watering unloading valve of multiple Water spray nozzle and off-load protection.
Described high pressure water circuit comprises the watering unloading valve of a nozzle and off-load protection.
Described sprinkler system comprises high pressure water circuit and low pressure waterway, and described high pressure water circuit and low pressure waterway carry out gearshift by ball valve and switch.
Flow control valve is the flow control valve of pressure compensation type.
Spray control valve is the pressure compensated electronically controlled proportional valve of band.
Watering pump drive motor is hydraulic gerotor motor.
High pressure water circuit, low pressure waterway mate according to the pressure flow curve of fluid by nozzle, change jet pressure, and carry out off-load protecting control by water relief valve by changing nozzle quantity.
The beneficial effects of the utility model are:
(1) can realize product by this kind of design multi-functional, a system realizes two kinds of pressure circuits; (2) can be reduced the complexity of system greatly by this kind of design, especially the simplification effect of hydraulic system clearly, taking cost into account can reduce the cost of product to a great extent, and can reduce rate of fault; (3) flow control valve can well limit watering revolution speed, makes watering pump be unlikely to overload; (4) water route relief valve can ensure that water circuit system works under a steady pressure, is unlikely to because overpressure causes water pump to surpass moment of torsion.
Accompanying drawing explanation
Fig. 1 is single water pump pressure changeable control system schematic diagram;
Fig. 2 is the typical open circuit schematic diagram of Fig. 1 system.
Embodiment
As shown in Figure 1, single water pump pressure changeable control system of the present utility model, comprises flow control valve 1, spray control valve 2, watering pump drive motor 3, watering pump 4, water route switching ball valve 5, Water spray nozzle 6, watering unloading valve 7, water filter 8 and watering cutting ball valve 9.
Pressure oil (ensures that watering pump 4 operates not exceed the speed limit) metering-in control system after flow control valve 1 measures, by a spray control valve 2, carry out flow switch and size control, pressure oil drives watering pump drive motor 3 to rotate, thus drive watering pump 4 to rotate, watering pump 4 rotates and produces negative pressure, and then absorbs water from water tank 10, and water is entered sprinkler system.
Sprinkler system switches ball valve 5 by water route and selects watering high and low pressure water route, high and low pressure water route includes Water spray nozzle 6 and a watering unloading valve 7, and current, after Water spray nozzle, are injected on equipment, wherein low pressure waterway comprises multiple Water spray nozzle, and high pressure water circuit comprises single-nozzle.All on water route switches between ball valve 5 and Water spray nozzle 6 pipeline, the off-load pipeline that is communicated to water tank 10 is drawn in high pressure water circuit and low pressure waterway, off-load pipeline is arranged watering unloading valve 7, major control watering pressure, play the function of load protection, mainly prevent load shock or load abnormal from increasing, cause system pressure to raise, and then damage the pump housing; Simultaneously for preventing plug from blocking, build-up of pressure raises, and damages watering pump 4 housing.The basic reason that two water routes realize high and low pressure changeable is to control the quantity of Water spray nozzle and the throttling of Water spray nozzle size.Low pressure waterway can be used for spraying, and high pressure water circuit can be used for rinsing.
Water filter 8 is arranged on watering pump 4 with on the pipeline be connected between water tank 10, is namely arranged on the inlet pipeline of watering pump 4, plays filtration impurities in water, ensures that the water entering watering pump 4 has enough turbidity test, prevents impurity from entering watering pump 4, damages watering pump 4.
Watering cutting ball valve 9 is arranged on watering pump 4 with on the pipeline be connected between water tank 10, mainly contains two use, the first, after closing, cuts off water route and prevents from, because water level is higher than watering pump 4, causes the free channeling water of watering pump 4, causing leakage for sprinkler system; The second, during for changing water filter 8, the water in water tank 10 can not produce a large amount of leakage.
The theoretical foundation of the utility model design is the law of conservation of energy of working fluid, realizes the coupling of pressure versus flow by changing passage section.This system manually water route switches ball valve commutation, realizes high pressure watering loop and low pressure and to sprinkle water the switching in loop.High-low circuit, by changing cross-sectional flow area, alter pressure and flow velocity, realizes high low pressure pressure changeable and controls.This design cost is low, and reliability is high; The complexity of system can be reduced cleverly, improve working life and improving product stability.
Shown in composition graphs 2: this system is a typical open circuit, hydraulic system provides steady pressure to supply to flow control valve 1, flow control valve 1 is pressure compensation type, the driving hydraulic oil of the system of entering can be ensured, do not change with the fluctuation of load, spray control valve 2 is band pressure compensation electronically controlled proportional valve, can ensure that watering drives hydraulic fluid flow rate and electrical control signal linear correlation, thus make the strictly relevant to operating console rotary knob potentiometer by flow of spray control valve 2, and then realize the linearity control of watering amount.Watering pump drive motor 3 is hydraulic gerotor motor, by flow control valve 2 flow control, and drive watering pump 4, watering pump 4 is absorbed water from water tank 10, and be delivered to sprinkling system, sprinkling system switches ball valve 5 by manual water route, be distinguished into high pressure water circuit and low pressure waterway two overlaps subtense angle, low pressure waterway comprises multiple Water spray nozzle and a watering unloading valve 7, high pressure water circuit comprises single-nozzle and a watering unloading valve 7, high, low pressure waterway coupling Main Basis fluid is mated by the pressure flow curve of nozzle, jet pressure is changed by changing nozzle quantity, and carry out off-load protecting control by watering unloading valve 7.
Claims (7)
1. single water pump pressure changeable control system, is characterized in that, comprises flow control valve, spray control valve, watering pump drive motor, watering pump;
Pressure oil enters spray control valve after described flow control valve metering, controls the uninterrupted of the pressure oil entering watering pump drive motor through spray control valve;
Described watering pump is driven by described watering pump drive motor and rotates, and absorbs water, and water is entered sprinkler system when described watering pump rotates from water tank;
Described sprinkler system realizes switching watering between high pressure water circuit and low pressure waterway.
2. single water pump pressure changeable control system according to claim 1, is characterized in that, described low pressure waterway comprises the watering unloading valve of multiple Water spray nozzle and off-load protection.
3. single water pump pressure changeable control system according to claim 1, is characterized in that, described high pressure water circuit comprises the watering unloading valve of a nozzle and off-load protection.
4. single water pump pressure changeable control system according to claim 1, it is characterized in that, described sprinkler system comprises high pressure water circuit and low pressure waterway, and described high pressure water circuit and low pressure waterway carry out gearshift by ball valve and switch.
5. single water pump pressure changeable control system according to claim 1, it is characterized in that, flow control valve is the flow control valve of pressure compensation type.
6. single water pump pressure changeable control system according to claim 1, is characterized in that, spray control valve is the pressure compensated electronically controlled proportional valve of band.
7. single water pump pressure changeable control system according to claim 1, is characterized in that, watering pump drive motor is hydraulic gerotor motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520195460.4U CN204692067U (en) | 2015-04-02 | 2015-04-02 | Single water pump pressure changeable control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520195460.4U CN204692067U (en) | 2015-04-02 | 2015-04-02 | Single water pump pressure changeable control system |
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| CN204692067U true CN204692067U (en) | 2015-10-07 |
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| CN201520195460.4U Active CN204692067U (en) | 2015-04-02 | 2015-04-02 | Single water pump pressure changeable control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791230A (en) * | 2015-04-02 | 2015-07-22 | 徐州徐工筑路机械有限公司 | Control system for changing pressure of single water pump |
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2015
- 2015-04-02 CN CN201520195460.4U patent/CN204692067U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791230A (en) * | 2015-04-02 | 2015-07-22 | 徐州徐工筑路机械有限公司 | Control system for changing pressure of single water pump |
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