CN102430533A - Engineering machinery and water washing system thereof - Google Patents
Engineering machinery and water washing system thereof Download PDFInfo
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- CN102430533A CN102430533A CN201110262386XA CN201110262386A CN102430533A CN 102430533 A CN102430533 A CN 102430533A CN 201110262386X A CN201110262386X A CN 201110262386XA CN 201110262386 A CN201110262386 A CN 201110262386A CN 102430533 A CN102430533 A CN 102430533A
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Abstract
The invention discloses engineering machinery and a water washing system thereof. The water washing system of the engineering system comprises a water circulation component and a pneumatic emptying component, wherein the water circulation component comprises a water pump driving device, a water pump and a water pipe; the water pump driving device drives the water pump to rotate; the water pipe is connected with the water pump; the pneumatic emptying component comprises a pneumatic pipe; one end of the pneumatic pipe is communicated with an air source, and the other end is communicated with the water circulation component; the water washing system also comprises a first processor and a detection device; the pneumatic pipe is connected in series with an air path control valve; the detection device is used for detecting the operation state of the water circulation component; and when the first processor judges that the water circulation component stops operation according to a detection signal of the detection device, the first processor can open the air path control valve. By adopting the water washing system, the pneumatic emptying component can discharge water held in the circulation component in time after the water washing is finished.
Description
Technical field
The present invention relates to a kind of water-washing technique of engineering machinery, particularly a kind of water wash system of engineering machinery also relates to the engineering machinery that comprises this water wash system.
Background technology
Current, utilize water wash system that engineering machinery such as concrete mixer, conveying machinery are cleaned usually, to avoid material such as concrete bonding, keep the effective utilization of engineering machinery.Water wash system generally comprises the water recirculation assembly, and the water recirculation assembly comprises the water pump drive unit of water tank, water pump, driving pump operation and suitable water pipe; The precalculated position that the water that can water pump be pumped through suitable water pipe is introduced engineering machinery is washed precalculated position and material thereof.
Under the lower working environment of temperature such as cold or winter,, need after water-washing process finishes, the water in the water recirculation assembly be discharged for the water in the anti-sealing recirculation assembly freezes and causes water pump or water pipe to damage.
For the water in the water recirculation assembly is discharged, water wash system can be provided with corresponding air pressure emptying assembly.Air pressure emptying assembly generally comprises pneumatic tube, and said pneumatic tube one end communicates with source of the gas, and the other end communicates with water pipe or other parts in the water recirculation assembly through check valve.Air pressure emptying assembly can be pressed into air in the water recirculation assembly through check valve, and the water that is detained in the water recirculation assembly is forced to discharge; Check valve can stop the aqueous reflux in the water recirculation assembly to be gone in the pneumatic tube.Current, though air pressure emptying assembly can be discharged the water in the water recirculation assembly, all need carry out independent manually-operated, the operational motion that depends on operating personnel starts; Therefore, in actual job,, and then can not in time the water in the water recirculation assembly be discharged, cause damage water recirculation assembly and water wash system often because operating personnel's negligence or artificial origin and do not start air pressure emptying assembly.
Therefore, how in time the water in the water recirculation assembly in time to be discharged, and then avoid because the damage that water freezes the water recirculation assembly is those skilled in the art's technical issues that need to address.
Summary of the invention
Therefore, the technical problem that the present invention will solve is, a kind of water wash system of engineering machinery is provided, and utilizes this water wash system, and after washing finished, its air pressure emptying assembly can in time in time be discharged the water in the water wash system.
Providing under the prerequisite of above-mentioned water wash system, the present invention also provides a kind of engineering machinery that comprises this water wash system.
For solving the problems of the technologies described above, the water wash system of engineering machinery provided by the invention comprises the empty assembly of the gentle pressure of water recirculation assembly; Said water recirculation assembly comprises water pump drive unit, water pump and water pipe; Said water pump drive unit drives said pump operation, and said water pipe links to each other with water pump; Said air pressure emptying assembly comprises pneumatic tube, and an end of said pneumatic tube communicates with source of the gas, and the other end communicates with the water recirculation assembly; Also comprise first processor and checkout gear; Be connected with gas path control valve on the said pneumatic tube; Said checkout gear is used to detect the operating condition of said water recirculation assembly; When said first processor judged that according to the detection signal of checkout gear the water recirculation assembly shuts down, this first processor can make said gas path control valve open.
Optional, said water recirculation assembly comprises the water inlet control valve that is connected in the pump sump mouth; Said checkout gear is for detecting the state detection sensor of said water inlet control valve state.
Optional, said water recirculation assembly also comprises the water pump controlling organization of controlling said water pump drive unit and second processor of controlling this water pump controlling organization; Said checkout gear is for detecting the detecting unit of the second processor control signal.
Optional, said first processor, second processor and detecting unit are integrated into a controller.
Optional, also comprise the water inlet control valve that is connected in the pump sump mouth; When said first processor judges that said water recirculation assembly shuts down, said water inlet control valve is closed.
Optional, said water pipe comprises water inlet pipe, said water inlet pipe is connected between the water sucking mouth of water inlet control valve and water pump; The other end of said pneumatic tube communicates with said water inlet pipe.
Optional, also comprise the outlet water control valve that links to each other with the said water pump pump mouth of a river; The scheduled time after said first processor is opened gas path control valve, this first processor can also make outlet water control valve close, and said water inlet control valve is opened.
Optional, also comprise the temperature detection sensor that water temperature or environment temperature to water tank detect; When said first processor judges that according to the detection signal of temperature detection sensor water temperature or the environment temperature of water tank are lower than predetermined value, judge according to the detection signal of checkout gear whether the water recirculation assembly shuts down again.
Optional, also comprise the forced drainage switch that links to each other with said first processor; When said forced drainage switch was in predetermined state, said first processor judged according to the detection signal of checkout gear whether the water recirculation assembly shuts down.
Optional, also comprise the level detection sensor and the warning device of the water level in the precalculated position that is used to detect said water recirculation assembly; Said first processor can send alarm signal to warning device according to predetermined control strategy; Said warning device can send predetermined caution according to alarm signal; Said predetermined control strategy comprises: the scheduled time after said gas path control valve is opened, and the water level in said water recirculation assembly precalculated position is when being higher than predetermined value, and said first processor sends alarm signal to warning device.
Engineering machinery provided by the invention comprises engineering machinery body and water wash system, and said water wash system is above-mentioned any water wash system, and the pump mouth of a river of said water pump communicates through the precalculated position of water pipe with the engineering machinery body.
Compared with prior art, the water wash system of engineering machinery provided by the invention comprises first processor and checkout gear; And be connected with gas path control valve on the said pneumatic tube; Said checkout gear is used to detect the operating condition of said water recirculation assembly; According to the detection signal of checkout gear, when said first processor judged that the water recirculation assembly shuts down, this first processor can make gas path control valve open.Like this, shut down at the water recirculation assembly, when promptly water-washing process finished, first processor can be opened gas path control valve automatically, made compressed air pass through air pressure emptying assembly and arrived in the water recirculation assembly, and the water of water recirculation assembly is forced to discharge; And then, utilize this water wash system, after washing finished, its air pressure emptying assembly can in time in time be discharged the water that is trapped in the recirculation assembly.
In further technical scheme, said water recirculation assembly comprises the water inlet control valve that is connected in the pump sump mouth; Said checkout gear is for detecting the state detection sensor of said water inlet control valve state.Like this,, just can start air pressure emptying assembly automatically, the water in the water recirculation assembly is in time discharged water-washing process being finished and water inlet control valve when closing.
In further technical scheme, said water recirculation assembly also comprises the water pump controlling organization of controlling said water pump drive unit and second processor of controlling this water pump controlling organization; Said checkout gear is for detecting the detecting unit of the second processor control signal.Can judge the operating condition of water circulation through detecting the second processor control signal, can improve the reliability of the detection signal of checkout gear so on the one hand, can improve the automaticity that air pressure emptying assembly starts in the water wash system on the other hand.
In further technical scheme, said first processor, second processor and detecting unit are integrated into a controller.The integrated level of water wash system be can improve like this, the installation and the assembling of water wash system made things convenient for.
In further technical scheme, also comprise the water inlet control valve that is connected in the pump sump mouth; When said first processor judges that said water recirculation assembly shuts down, said water inlet control valve is closed.Like this can be with the water inlet end sealing of water recirculation assembly; To realize to getting into the control of water recirculation assembly air flow direction; Compressed air is discharged from discharge outlet or other precalculated positions of water recirculation assembly, and then the water of water recirculation assembly is discharged along projected route.
In further technical scheme, said water pipe comprises water inlet pipe, and said water inlet pipe is connected between the water sucking mouth of water inlet control valve and water pump; The other end of said pneumatic tube communicates with said water inlet pipe through check valve.Can make compressed air pass through water pump like this water in the water recirculation assembly is discharged, and then the water in the water pump is forced to discharge, the water that will be trapped in as much as possible in the water recirculation assembly is discharged.
In further technical scheme, also comprise outlet water control valve; Said water pipe comprises outfall sewer, and said outfall sewer is connected between the pump mouth of a river of outlet water control valve and water pump; The scheduled time after said first processor is opened gas path control valve, this first processor can also make outlet water control valve close, and water inlet control valve is opened.Utilize this technical scheme, air pressure emptying operation can be divided into two stages: the phase I is that water inlet control valve is closed, and the water in the water recirculation assembly is discharged through outlet water control valve; Second stage is that outlet water control valve is closed, and water inlet control valve is opened, and remaining water is discharged through water inlet control valve.Like this can be with the water that is detained in water recirculation assembly row cleaner.
In further technical scheme, also comprise the temperature detection sensor that water temperature or environment temperature to water tank detect; When judging at the bottom of water temperature or the environment temperature of water tank according to the temperature detection sensor detection signal at said first processor, judge according to the detection signal of checkout gear whether the water recirculation assembly shuts down again in predetermined value.Like this, first processor just has two kinds of mode of operations, and a kind of mode of operation is the forced drainage pattern; Under this pattern, air pressure emptying assembly can start and forced drainage when the water recirculation assembly shuts down automatically.Another kind of pattern is a general modfel, and under this pattern, when the water recirculation assembly shut down, air pressure emptying assembly started no longer automatically, no longer carried out forced drainage.The pattern conversion is to confirm according to the detection signal of temperature detection sensor; Lower in temperature, when the water in the water circulation system may freeze, first processor was transformed into the forced drainage pattern according to the detection signal of temperature detection sensor; Higher in temperature, when the water in the water circulation system can not freeze, first processor was transformed into general modfel according to the detection signal of temperature detection sensor, no longer carried out the air pressure draining.This just makes this water wash system have stronger adaptability, and can reduce the energy consumption of water wash system.
In further technical scheme, water wash system also comprises level detection sensor and the warning device that is used to detect said water recirculation assembly precalculated position water level; Said first processor can be after gas path control valve be opened the scheduled time, and when judging that according to the detection signal of level detection sensor the water level in said water recirculation assembly precalculated position is higher than predetermined value, send alarm signal to warning device; Said warning device can send predetermined caution according to alarm signal.Like this,, can send corresponding caution, reminding operating personnel, and then improve the reliability of water wash system at air pressure emptying operation failure or when having bigger water not discharge.
Based on above-mentioned water wash system, the engineering machinery that comprises this water wash system that provides also has corresponding technique effect.
Description of drawings
Fig. 1 is the water wash system operation principle sketch map of the engineering machinery that provides of the embodiment of the invention one;
Fig. 2 is the operation principle sketch map of the water wash system of the engineering machinery that provides of the embodiment of the invention two.
The specific embodiment
Describe the present invention below in conjunction with accompanying drawing, the description of this part only is exemplary and explanatory, should not be regarded as the restriction to public technology content of the present invention.
Please refer to Fig. 1, this figure and be the operation principle sketch map of the water wash system of the engineering machinery that the embodiment of the invention one provides.
The water wash system that embodiment one provides comprises the empty assembly of the gentle pressure of water recirculation assembly.The water recirculation assembly comprises water pump controlling organization 10, water pump drive unit 11, water pump 12, outlet water control valve 13, water inlet control valve 14 and corresponding water pipe.Wherein, water pump controlling organization 10 control water pump drive units 11, water pump drive unit 11 can drive water pump 12 runnings, and water pump 12 can be absorbed water from water tank 15, and water is discharged from delivery port; Outlet water control valve 13 is connected between the pump mouth of a river and delivery port of water pump 12, and water inlet control valve 14 is connected between water pump 12 water sucking mouths and the water tank 15.In this example, water pipe comprises water inlet pipe 17 and outfall sewer 18, and water inlet pipe 17 is connected between the water sucking mouth of water inlet control valve 14 and water pump 12, and outfall sewer 18 is connected between the pump mouth of a river and outlet water control valve 13 of water pump 12.As shown in the figure; Water circulation system also comprises overflow valve 16 and check valve 17; Overflow valve 16 is connected between the pump mouth of a river and water tank 15 of water pump 12, and check valve 17 is connected between the gap and water tank 15 of overflow valve 16, and the water that overflows through overflow valve 16 can be back to water tank 15 through check valve 17; Simultaneously, check valve 17 can prevent that the water of water tank 15 from arriving stream.
In this example, water pump drive unit 11 is a hydraulic motor, and hydraulic motor drives water pump 12 runnings through the power transmission shaft that is fit to; Corresponding with hydraulic motor, water pump controlling organization 10 is three hydraulic control valves; As shown in the figure, when hydraulic control valve was positioned at position, a left side, the hydraulic oil of hydraulic oil source can arrive hydraulic motor through this hydraulic control valve, makes hydraulic slave motor run.The position of hydraulic control valve 10 is controlled by two coils, powers on and cuts off the power supply through the proper device control coil and can realize the conversion to the hydraulic control valve position.Certainly, water pump drive unit 11 is not limited to hydraulic motor, also can be existing other power sources, like motor, engine or the like; Corresponding with power source, water pump controlling organization 10 also can adopt the mechanism that is complementary with power source, with the control of realization to power source, and then the operating condition of control water pump 12.
Air pressure emptying assembly comprises pneumatic tube 20, and an end of pneumatic tube 20 communicates with the source of the gas that can provide compressed air or other to have predetermined pressed gas through gas path control valve 21, and the other end communicates with water inlet pipe 17 outside water pump 12 water sucking mouths through check valve 23; Check valve 23 fills perhaps that compressed air flow to water inlet pipe 17, but can stop aqueous reflux in the water inlet pipe 17 in pneumatic tube 20.In this example, gas path control valve 21 is the bi-bit bi-pass electrically-controlled valve, can change the position of gas path control valve through coil DT1, and then gas path control valve 21 is opened or closed.Coil DT1 forms the control end of gas path control valve 21.
In this example, water inlet control valve 14 is a switch valve.Water wash system also comprises first processor 31 and the state detection sensor 33 that detects water inlet control valve 14 states; State detection sensor 33 links to each other with an input of first processor 31, and the output of first processor 31 links to each other with the control end of gas path control valve 21.State detection sensor 33 can detect the state of water inlet control valve 14, and when water inlet control valve 14 stayed open and closes, state detection sensor 33 transmitted the different detection signal to first processor 31; And then whether the difference of first processor 31 detection signal that can transmit according to state detection sensor 33 judge the water recirculation assembly just in discharge water, judges promptly whether the water recirculation assembly turns round, and send predetermined command signal according to judged result.
In water-washing process, water inlet control valve 14 is opened, and gas path control valve 21 keeps shut, and outfall sewer 18 communicates through the delivery port of outlet water control valve 13 with the water recirculation assembly, keeps between source of the gas and the pneumatic tube 20 isolating; At this moment, water pump 12 runnings can absorb water from water tank 15, and water is flowed out from delivery port with predetermined flow velocity, realize the flushing to the engineering machinery precalculated position.After water-washing process finished, water pump 12 shut down, and closes water inlet control valve 14.
When closing water inlet control valve 14, state detection sensor 33 changes to the detection signal that first processor 31 transmits.According to the variation that state detection sensor 33 transmits detection signal, first processor 31 can judge whether the water recirculation assembly shuts down; When first processor 31 judged that the water recirculation assembly shuts down, first processor 31 transmitted control signal to gas path control valve 21, changes the electric current of coil DT1, and gas path control valve 21 is opened; At this moment; Keep communicating between source of the gas and the pneumatic tube 20; The compressed air that source of the gas provides arrives in the water inlet pipe 17 of water circulation system through gas path control valve 21, pneumatic tube 20 and check valve 23, and the water that is trapped in water inlet pipe 17, water pump 12 and outfall sewer 18 is discharged through outlet water control valve 13.Like this, shut down at the water recirculation assembly, when promptly water-washing process finished, first processor 31 can be opened gas path control valve 21 automatically, made compressed air pass through air pressure emptying assembly automatically and arrived in the water recirculation assembly, and the water that the water recirculation assembly is detained is forced to discharge.And then, utilize this water wash system, after washing finished, its air pressure emptying assembly can in time in time be discharged the water in the water wash system.
According to actual conditions, the concrete connection arrangement of the particular type of gas path control valve 21, water pipe and pneumatic tube 20 can be selected suitable manner according to actual needs, is not limited to above-mentioned concrete mode.In this example, the other end of pneumatic tube 20 communicates with water inlet pipe 17 through check valve 23, and in air pressure emptying operation, water inlet control valve 14 is closed; Can make compressed air pass through water pump 12 like this, and then the water that is detained in the water pump 12 is forced to discharge, the water with the water recirculation assembly drains only as much as possible.Certainly, according to actual needs, the other end of pneumatic tube 20 is communicated with other parts of water recirculation assembly, as directly communicating with the precalculated position of water pump 12 or communicate or the like with outfall sewer 18.Because gas path control valve 21 is set, the sealing that can keep pneumatic tube 20 1 ends through gas path control valve 21, and then can avoid water to flowing in the source of the gas, therefore, also can check valve 23 be saved.
In air pressure emptying operating process, the water in the water recirculation assembly is not limited to discharge through delivery port, also can water be discharged in the water tank 15, to improve the cyclic utilization rate of water.In this example, outlet water control valve 13 is a triple valve, and the water inlet a of this triple valve communicates with the pump mouth of a river of water pump 12, and a delivery port b communicates with the delivery port of water circulation system, and another delivery port c passes through with water tank 15 through check valve 17 mutually; Like this, in air pressure emptying operating process, can change the state of outlet water control valve 13 according to actual needs, water inlet a is communicated with delivery port b, at this moment, the water of delay is discharged from delivery port, and water inlet a is communicated with delivery port c; At this moment, shown in arrow among the figure, water is back in the water tank 15 through check valve 17.
In this example, water wash system also comprises the temperature detection sensor 34 that the water temperature to water tank 15 detects, and this temperature detection sensor 34 links to each other with an input of first processor 31, can send detection signal to first processor 31.When first processor 31 judges according to the detection signal of temperature detection sensor 34 whether the water temperature of water tank 15 is lower than predetermined value; Water temperature at water tank 15 is lower than predetermined value, and when water possibly freeze, first processor 31 judged according to the detection signal of state detection sensor 33 whether the water recirculation assembly shuts down again, determines whether gas path control valve 21 is opened according to aforesaid way again; Water temperature at water tank 15 is not less than predetermined value; When water can not freeze; First processor 31 no longer judges according to the detection signal of state detection sensor 33 whether the water recirculation assembly shuts down; Also just no longer determine whether gas path control valve 21 is opened, and then no longer carry out air pressure emptying operation according to aforesaid way.
Like this, first processor 31 just has two kinds of mode of operations: a kind of mode of operation is the forced drainage pattern, under this pattern, air pressure emptying assembly can be started and forced drainage automatically when the water recirculation assembly shuts down.Another kind of pattern is a general modfel, and under this pattern, when the water recirculation assembly shut down, air pressure emptying assembly was not restarted, and no longer carried out forced drainage.The pattern conversion is confirmed according to temperature detection sensor 34 detection signals; The temperature of water is lower in water tank 15, and when the water that water circulation system is detained may freeze, first processor 31 was transformed into the forced drainage pattern according to the detection signal of temperature detection sensor 34; The temperature of water is higher in water tank 15, and when the water that water circulation system is detained can not freeze, first processor 31 was transformed into general modfel according to the detection signal of temperature detection sensor 34, no longer carries out the air pressure draining.This just makes this water wash system have stronger adaptability, and reduces the energy consumption of water wash system.Certainly, temperature detection sensor 34 is not limited to detect the water temperature of water tank 15, also can the testing environment temperature, and to carry out the pattern conversion.Above-mentioned predetermined value can be selected according to actual needs, with when guaranteeing that occluded water can not freeze, selects general modfel can not cause the damage to water circulation system.
In addition, also the forced drainage switch can be set, as shown in the figure, water wash system also comprises the forced drainage switch 32 that links to each other with first processor 31; Judge that at first processor 31 forced drainage switch 32 is in predetermined state (like open mode); And when judging that according to the detection signal of state detection sensor 33 the water recirculation assembly shuts down; Gas path control valve 21 is opened, carried out air pressure emptying operation in the above described manner; Judge that at first processor 31 forced drainage switch 32 is in other states (like closed condition); Even when judging that according to the detection signal of state detection sensor 33 the water recirculation assembly shuts down; Gas path control valve 21 is opened, no longer carried out air pressure emptying operation.Like this, first processor 31 is changed between forced drainage pattern and general modfel, realized specific purpose through forced drainage switch 32.
As shown in the figure; In this example; Water wash system also comprises the level detection sensor 35 and warning device 36 that is used to detect said water recirculation assembly extreme lower position water level, and level detection sensor 35 links to each other with an output with an input of first processor 31 respectively with warning device 36.At this moment; First processor 31 can be opened the back to gas path control valve 21 and carry out timing the time (timing can be sent to gas path control valve 21 according to first processor 31 and started in the signals; Also can otherwise carry out), and can judge whether the water level of water recirculation assembly extreme lower position is higher than predetermined value according to the detection signal of level detection sensor 35.And then first processor 31 can send alarm signal to warning device 36 according to predetermined strategy; Said warning device 36 can send predetermined caution according to alarm signal.Said predetermined control strategy can comprise: the scheduled time after gas path control valve 21 is opened, and the water level of the extreme lower position of water recirculation assembly is when being higher than predetermined value, and first processor 31 sends alarm signals to warning device 36.The scheduled time can be confirmed according to the water wash system concrete condition, accomplish to guarantee air pressure emptying operating process; After air pressure emptying behaviour process is done to accomplish, if the water level of water recirculation assembly extreme lower position still is higher than predetermined value, explain that other parts of air pressure emptying assembly or water wash system break down, the water that is detained is not discharged, or more occluded water is still arranged; At this moment, first processor 31 sends warning device 36 and recruits alert signal, can remind operating personnel to note, to improve the reliability of water wash system.
The particular location that level detection sensor 35 detects can be selected according to actual needs, can select position, water sucking mouth or other precalculated positions of water pump 12.Warning device 36 can be the warning caution that can send sound, light or other signals.
For the automaticity of further raising air pressure emptying operation start, the present invention also provides the water wash system of another kind of structure.
Please refer to Fig. 2, this figure is the operation principle sketch map of the water wash system of the engineering machinery that provides of the embodiment of the invention two.
Compare with embodiment one, the difference of the water wash system that embodiment two provides comprises: the water recirculation assembly also comprises second processor 19 of control water pump controlling organization 10; The output of second processor 19 links to each other with the control end of water pump controlling organization 10; Like this, second processor 19 can send different control signals to water pump controlling organization 10, changes the state of water pump controlling organization 10, and then passes through the operating condition of water pump drive unit 11 control water pumps 12, changes the operating condition of water recirculation assembly.In addition, the checkout gear that checkout gear detects the operating condition of water recirculation assembly is a detecting unit 37, and detecting unit 37 links to each other with first processor 31 with second processor 19 respectively; Like this; Detecting unit 37 just can transmit control signal through detecting second processor 19, transmits the different detection signal to first processor 31, and then first processor 31 can be confirmed the operating condition of water recirculation assembly according to the difference that detecting unit 37 transmits detection signal; The identical mode of basis and embodiment one again; When judging that the water recirculation assembly shuts down, this first processor 31 is opened gas path control valve 21, carries out air pressure emptying operation.Like this, when water-washing process is finished, just can start air pressure emptying assembly automatically, the water in the water recirculation assembly is in time discharged; No longer the state variation according to water inlet control valve 14 judges whether to start air pressure emptying assembly; That is to say: utilize this water wash system, after water-washing process finishes, do not need any operational motion of operating personnel, just can carry out air pressure emptying operation, improve the automaticity that water wash system air pressure emptying assembly starts.In this example, detect the operating condition that second processor, 19 control signals are judged the water recirculation assembly, can improve the reliability of the detection signal of checkout gear through detecting unit 37.
In this example, in order to improve the integrated level of water wash system, make things convenient for the installation and the assembling of water wash system, first processor 31, second processor 19 and detecting unit 37 can be integrated into a controller 200.
In air pressure emptying operating process, in order to control the draining water (flow) direction more accurately, in this example, water inlet control valve 14 is the bi-bit bi-pass electrically operated valve, and the control end of this water inlet control valve 14 links to each other with an output of first processor 31.Like this, when first processor 31 judges that the water recirculation assembly shuts down, water inlet control valve 14 is closed; And then can the water inlet end sealing of water recirculation assembly be made compressed air discharge from discharge outlet or other precalculated positions of water recirculation assembly, and then the water of water recirculation assembly is discharged along projected route.Reduce compressed-air actuated outlet quantity, can also keep under the constant situation of compressed air pressure, make the more thorough of water deduction in the water recirculation assembly.
On embodiment two bases, can also outlet water control valve 13 be set to electrically-controlled valve, and the control end of this outlet water control valve 13 is linked to each other with an output of first processor 31.And make the state of first processor 31 according to predetermined policy control outlet water control valve 13, and its predetermined strategy can be: the scheduled time after gas path control valve 21 is opened, and outlet water control valve is closed, water inlet control valve 15 is opened.Utilize this technical scheme, can be divided into two stages in air pressure emptying operating process: the phase I is that water inlet control valve 14 is closed, and the water in the water recirculation assembly is discharged through outlet water control valve 13; Second stage is that outlet water control valve 13 is closed, and water inlet control valve 14 is opened, and the water in the water recirculation assembly is discharged through water inlet control valve 14.Like this can be with the water of water recirculation assembly row cleaner.
According to foregoing description; Be appreciated that; The mode of confirming water recirculation assembly duty is not limited to aforesaid way, also other checkout gears can be set, and confirms the duty of water recirculation assembly through detecting water recirculation assembly corresponding work parameter; And then judge whether the water recirculation assembly shuts down; Such as, checkout gear can be a press detection sensor, the pressure of the rotating speed through detecting hydraulic slave motor run state, water pump, the pressure of water pipe or hydraulic oil pipe is confirmed the duty of water recirculation assembly.
Providing on the basis of above-mentioned water wash system; The present invention also provides a kind of engineering machinery that comprises this water wash system; This project machinery comprises engineering machinery body and water wash system; Said water wash system is above-mentioned each water wash system, and the pump mouth of a river of water pump 12 communicates through the precalculated position of water pipe with the engineering machinery body.Engineering machinery can be concrete mixer, concrete conveyer or the like.
Used concrete example among this paper technical scheme provided by the invention is set forth, the explanation of above embodiment just is used for helping to understand technical scheme provided by the invention.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (11)
1. the water wash system of an engineering machinery comprises the empty assembly of the gentle pressure of water recirculation assembly; Said water recirculation assembly comprises water pump drive unit (11), water pump (12) and water pipe; Said water pump drive unit (11) drives said water pump (12) running, and said water pipe links to each other with water pump (12); Said air pressure emptying assembly comprises pneumatic tube (20), and an end of said pneumatic tube (20) communicates with source of the gas, and the other end communicates with the water recirculation assembly; It is characterized in that,
Also comprise first processor (31) and checkout gear (33,37); Be connected with gas path control valve (21) on the said pneumatic tube (20); Said checkout gear (33,37) is used to detect the operating condition of said water recirculation assembly; When said first processor (31) judged that according to the detection signal of checkout gear (33,37) the water recirculation assembly shuts down, this first processor (31) can make said gas path control valve (21) open.
2. the water wash system of engineering machinery according to claim 1 is characterized in that, said water recirculation assembly comprises the water inlet control valve (14) that is connected in water pump (12) water sucking mouth; Said checkout gear (33,37) is for detecting the state detection sensor (33) of said water inlet control valve (14) state.
3. the water wash system of engineering machinery according to claim 1 is characterized in that, said water recirculation assembly also comprises the water pump controlling organization (10) of the said water pump drive unit of control (11) and second processor (19) of this water pump controlling organization (10) of control; Said checkout gear (33,37) is for detecting the detecting unit (37) of second processor (19) control signal.
4. the water wash system of engineering machinery according to claim 3 is characterized in that, said first processor (31), second processor (19) and detecting unit (37) are integrated into a controller (200).
5. the water wash system of engineering machinery according to claim 3 is characterized in that, also comprises the water inlet control valve (14) that is connected in water pump (12) water sucking mouth; When said first processor (31) judges that said water recirculation assembly shuts down, said water inlet control valve (14) is closed.
6. the water wash system of engineering machinery according to claim 5 is characterized in that, said water pipe comprises water inlet pipe (17), and said water inlet pipe (17) is connected between the water sucking mouth of water inlet control valve (14) and water pump (12); The other end of said pneumatic tube (20) communicates with said water inlet pipe (17).
7. the water wash system of engineering machinery according to claim 6 is characterized in that, also comprises the outlet water control valve (13) that links to each other with said water pump (12) the pump mouth of a river; Make the scheduled time after gas path control valve (21) is opened at said first processor (31), this first processor (31) can also make outlet water control valve (13) close, and said water inlet control valve (14) is opened.
8. according to the water wash system of each described engineering machinery of claim 1-7, it is characterized in that, also comprise the temperature detection sensor (34) that water temperature or environment temperature to water tank (15) detect; When said first processor (31) judges that according to the detection signal of temperature detection sensor (34) water temperature or the environment temperature of water tank (15) are lower than predetermined value, judge according to the detection signal of checkout gear (33,37) whether the water recirculation assembly shuts down again.
9. the water wash system of engineering machinery according to claim 8 is characterized in that, also comprises the forced drainage switch (32) that links to each other with said first processor (31); When said forced drainage switch (32) was in open mode or closed condition, said first processor (31) judged according to the detection signal of checkout gear (33,37) whether the water recirculation assembly shuts down.
10. according to the water wash system of each described engineering machinery of claim 1-7, it is characterized in that, also comprise the level detection sensor (35) and the warning device (36) of the water level in the precalculated position that is used to detect said water recirculation assembly;
Said first processor (31) can send alarm signal to warning device (36) according to predetermined control strategy; Said warning device (36) can send predetermined caution according to alarm signal; Said predetermined control strategy comprises: the scheduled time after said gas path control valve (21) is opened, and the water level in said water recirculation assembly precalculated position is when being higher than predetermined value, and said first processor (31) sends alarm signal to warning device (36).
11. an engineering machinery comprises engineering machinery body and water wash system, it is characterized in that, said water wash system is each described water wash system of claim 1-10, and the pump mouth of a river of said water pump (12) communicates through the precalculated position of water pipe with the engineering machinery body.
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| CN201110262386.XA CN102430533B (en) | 2011-09-06 | 2011-09-06 | Engineering machinery and water washing system thereof |
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| CN201110262386.XA CN102430533B (en) | 2011-09-06 | 2011-09-06 | Engineering machinery and water washing system thereof |
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| CN102430533B CN102430533B (en) | 2014-05-28 |
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| Publication number | Publication date |
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| CN102430533B (en) | 2014-05-28 |
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