CN204978596U - Electro -hydraulic control system and engineering vehicle of machineshop car landing leg - Google Patents
Electro -hydraulic control system and engineering vehicle of machineshop car landing leg Download PDFInfo
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- CN204978596U CN204978596U CN201520699025.5U CN201520699025U CN204978596U CN 204978596 U CN204978596 U CN 204978596U CN 201520699025 U CN201520699025 U CN 201520699025U CN 204978596 U CN204978596 U CN 204978596U
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Abstract
The utility model discloses an electro -hydraulic control system and engineering vehicle of machineshop car landing leg, the oil -out of the pilot valve module in the system links to each other with landing leg operating handle's oil inlet, and the oil -out of the automatically controlled valves of landing leg links to each other with the actuator port of switching -over valve, the actuator port of switching -over valve respectively with the no pole chamber of left branch leg revenue and expenditure hydro -cylinder with have the pole chamber to link to each other, the actuator port of switching -over valve respectively with the no pole chamber of right branch leg revenue and expenditure hydro -cylinder with have the pole chamber to link to each other, controlling means is connected with the automatically controlled valves of landing leg, pilot valve module electricity respectively. The utility model discloses an electro -hydraulic control system and engineering vehicle can make the machineshop car landing leg possess good fine motion nature and navigability when moving at a slow speed, and it is high to gather signal precision, judge to the accurate of operating condition of machineshop car that controllability is strong, can avoid operator's maloperation, has improved the security of whole car to can prolong the life of balanced valve, reduce repair time, reduce the incidence of high -risk accident.
Description
Technical field
The utility model relates to technical field of hydraulic, particularly relates to a kind of electrohydraulic control system and engineering truck of engineering vehicle's supporting legs.
Background technology
Engineering truck is a kind of purposes construction machinery and equipment widely, such as, have crane-car, dynamic compaction machinery etc.Different purposes and complicated operating mode determine the complexity of engineering truck hydraulic work system, and wherein the hydraulic pressure of supporting leg and the balance of electric-control system to car load play the important and pivotal role.Because supporting leg is to the vital function of engineering truck, so control system requires that supporting leg is simple to operate, safe and reliable, action response is fast, reduces the incidence of high-risk accident.But the fault of engineering vehicle's supporting legs hydraulic efficiency pressure system common is at present more hidden, easily occurs catastrophic failure, malfunction elimination relative difficulty, and maintenance time is long, and hydraulic component is short for service life, change frequent.In order to better address these problems, engineering vehicle's supporting legs is in the urgent need to a kind of safe and reliable electrohydraulic control and method for diagnosing faults.
Utility model content
In view of this, a technical matters to be solved in the utility model is to provide a kind of electrohydraulic control system and engineering truck of engineering vehicle's supporting legs, for controlling the flexible of left and right supporting leg.
An electrohydraulic control system for engineering vehicle's supporting legs, comprising: left branch leg revenue and expenditure oil cylinder, right supporting leg revenue and expenditure oil cylinder, supporting leg electrically-controlled valve group, change-over valve, priority valve module, supporting leg operating handle, working barrel and control setup; The oil outlet of described working barrel is connected with the oil inlet of described priority valve module; The oil outlet of described priority valve module is connected with the oil inlet of described supporting leg operating handle, and the first hydraulic fluid port of described supporting leg operating handle, the 3rd hydraulic fluid port are connected with the first oil inlet of described supporting leg electrically-controlled valve group, the second oil inlet respectively; Second hydraulic fluid port of described supporting leg operating handle, the 4th hydraulic fluid port are connected with the first control port of described change-over valve, the second control port respectively; First oil outlet of described supporting leg electrically-controlled valve group, the second oil outlet are connected with the first actuator port of described change-over valve, the second actuator port respectively; 3rd actuator port, the 4th actuator port of described change-over valve are connected with rod chamber with the rodless cavity of described left branch leg revenue and expenditure oil cylinder respectively; 5th actuator port, the 6th actuator port of described change-over valve are connected with rod chamber with the rodless cavity of described right supporting leg revenue and expenditure oil cylinder respectively; Described control setup is electrically connected with described supporting leg electrically-controlled valve group, priority valve module respectively.
According to an embodiment of the present utility model, further, also comprise: left branch leg balance cock and right supporting leg balance cock; Described left branch leg balance cock is arranged in the oil circuit between described change-over valve and described left branch leg revenue and expenditure oil cylinder, 3rd actuator port of described change-over valve, the 4th actuator port are connected with the first hydraulic fluid port of described left branch leg balance cock, the second hydraulic fluid port respectively, and the 3rd hydraulic fluid port, the 4th hydraulic fluid port of described left branch leg balance cock are connected with rod chamber with the rodless cavity of described left branch leg revenue and expenditure oil cylinder respectively; Described right supporting leg balance cock is arranged in the oil circuit between described change-over valve and described right supporting leg revenue and expenditure oil cylinder, 5th actuator port of described change-over valve, the 6th actuator port are connected with the first hydraulic fluid port of described right supporting leg balance cock, the second hydraulic fluid port respectively, and the 3rd hydraulic fluid port, the 4th hydraulic fluid port of described right supporting leg balance cock are connected with rod chamber with the rodless cavity of described right supporting leg revenue and expenditure oil cylinder respectively.
According to an embodiment of the present utility model, further, also comprise: the first pressure sensor, the second pressure sensor; Described second pressure sensor, described first pressure sensor are connected with the first hydraulic fluid port of described left branch leg balance cock, the second hydraulic fluid port respectively; Described control setup is electrically connected with described second pressure sensor, described first pressure sensor respectively.
According to an embodiment of the present utility model, further, also comprise: the 3rd pressure sensor, the 4th pressure sensor; 3rd hydraulic fluid port, the 4th hydraulic fluid port of described left branch leg balance cock are connected with described 4th pressure sensor, described 3rd pressure sensor respectively; Described control setup is electrically connected with described 3rd pressure sensor, described 4th pressure sensor respectively.
According to an embodiment of the present utility model, further, also comprise: the 5th pressure sensor, the 6th pressure sensor; First hydraulic fluid port, second hydraulic fluid port of described right supporting leg balance cock are connected with described 6th pressure sensor, described 5th pressure sensor respectively; Described control setup is electrically connected with described 6th pressure sensor, described 5th pressure sensor respectively.
According to an embodiment of the present utility model, further, also comprise: the 7th pressure sensor, the 8th pressure sensor; 3rd hydraulic fluid port, the 4th hydraulic fluid port of described right supporting leg balance cock are connected with described 8th pressure sensor, described 7th pressure sensor respectively; Described control setup is electrically connected with described 7th pressure sensor, described 8th pressure sensor respectively.
According to an embodiment of the present utility model, further, also comprise: put in place pressure switch, right supporting leg of left branch leg puts in place pressure switch; Described left branch leg pressure switch, the described right supporting leg pressure switch that puts in place that puts in place is connected with the 3rd hydraulic fluid port of described left branch leg balance cock, the 3rd hydraulic fluid port of described right supporting leg balance cock respectively.
According to an embodiment of the present utility model, further, also comprise: hydraulic reservoir; The return opening of described priority valve module, the return opening of described supporting leg operating handle, the return opening of described change-over valve are connected with described hydraulic reservoir respectively.Also comprise: oil suction filter core; Described working barrel is connected with described hydraulic reservoir by described oil suction filter core.
According to an embodiment of the present utility model, further, also comprise read out instrument, described read out instrument is electrically connected with described control setup; Also be provided with control button on said display means.Comprise: indicator lamp; Described indicator lamp is electrically connected with described control setup.
A kind of engineering truck, comprising: the electrohydraulic control system of engineering vehicle's supporting legs as above.
The electrohydraulic control system of engineering vehicle's supporting legs of the present utility model and engineering truck, engineering vehicle's supporting legs can be made to possess good fine motion and manipulative capability when action at a slow speed, collection signal precision is high, to the accurate judgement of the actual condition of engineering truck, response is fast, can avoid operator's maloperation, improve the safety of car load, and the service life of balance cock can be extended, convenient for maintaining staff, reduce the incidence of high-risk accident.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of an embodiment of electrohydraulic control system according to engineering vehicle's supporting legs of the present utility model;
Fig. 2 is the deployment schematic diagram of the electric control element of an embodiment of electrohydraulic control system according to engineering vehicle's supporting legs of the present utility model;
Fig. 3 be an embodiment of electrohydraulic control system according to engineering vehicle's supporting legs of the present utility model electricly connect schematic diagram;
Fig. 4 is the schematic flow sheet of the control method of an embodiment of electrohydraulic control system according to engineering vehicle's supporting legs of the present utility model;
Fig. 5 to Fig. 6 is the schematic flow sheet of the control method of another embodiment of electrohydraulic control system according to engineering vehicle's supporting legs of the present utility model; Wherein Fig. 6 is the part run schematic diagram of Fig. 5;
Fig. 7 is the parts connection diagram for carrying out method of inspection of an embodiment of electrohydraulic control system according to engineering vehicle's supporting legs of the present utility model;
Fig. 8 to Figure 10 is according to the schematic flow sheet for detecting left branch leg balance cock in the method for inspection of the electrohydraulic control system of engineering vehicle's supporting legs of the present utility model; Wherein, Fig. 9 and Figure 10 is the part run schematic diagram in Fig. 8.
Detailed description of the invention
With reference to the accompanying drawings the utility model is described more fully, exemplary embodiment of the present utility model is wherein described.Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.Below in conjunction with each figure and embodiment, many-sided description is carried out to the technical solution of the utility model.
Hereafter convenient in order to describe, hereinafter alleged " first ", " second " etc. distinguish on describing, not other special implication.
As shown in Figures 1 to 3, the utility model provides a kind of electrohydraulic control system of engineering vehicle's supporting legs, comprising: left branch leg revenue and expenditure oil cylinder 7, right supporting leg revenue and expenditure oil cylinder 10, supporting leg electrically-controlled valve group 3, change-over valve 17, priority valve module 18, supporting leg operating handle 1, working barrel 19 and control setup.The oil outlet of working barrel 19 is connected with the oil inlet P 10 of priority valve module 18.
The oil outlet P12 of priority valve module 18 is connected with the oil inlet P 11 of supporting leg operating handle 1, and the first hydraulic fluid port V1, the 3rd hydraulic fluid port V3 of supporting leg operating handle 1 are connected with the first oil inlet B, the second oil inlet D of supporting leg electrically-controlled valve group 3 respectively.Second hydraulic fluid port V2, the 4th hydraulic fluid port V4 of supporting leg operating handle 1 are connected with the first control port V11, the second control port V13 of change-over valve 17 respectively.
First oil outlet A, the second oil outlet C of supporting leg electrically-controlled valve group 3 are connected with the first actuator port V12, the second actuator port V14 of change-over valve 17 respectively.3rd actuator port A6, the 4th actuator port B6 oil content of change-over valve 17 are not connected with rod chamber with the rodless cavity of left branch leg revenue and expenditure oil cylinder 7.5th actuator port A7 of change-over valve 17, the rodless cavity of the right supporting leg revenue and expenditure oil cylinder 10 of the 6th actuator port B7 hydraulic fluid port difference are connected with rod chamber.Control setup is electrically connected with supporting leg electrically-controlled valve group 3, priority valve module 18 respectively.
In one embodiment, control setup can be implemented as various ways, and can be micro controller system, single board computer (SBC), PLC etc., such as, be electronic control unit 2.Control setup is also electrically connected with engine speed sensor, vehicle drivable position select switch, swing arm angular transducer, swing arm shrinkage limit bit switch respectively.Swing arm herein refers to the working arm that can stretch in engineering, and such as, engineering truck is crane-car, and swing arm is crane arm, and engineering truck is dynamic compaction machinery, and swing arm is the telescopic boom etc. of dynamic compaction machinery.
Left branch leg balance cock 22 is arranged in the oil circuit between change-over valve 17 and left branch leg revenue and expenditure oil cylinder 7,3rd actuator port A6 of change-over valve 17, the 4th actuator port B6 oil content are not connected with the first hydraulic fluid port D1 of left branch leg balance cock 22, the second hydraulic fluid port D2 hydraulic fluid port, and the 3rd hydraulic fluid port U1, the 4th hydraulic fluid port U2 of left branch leg balance cock 22 are connected with rod chamber with the rodless cavity of left branch leg revenue and expenditure oil cylinder 7 respectively.
Right supporting leg balance cock 23 is arranged in the oil circuit between change-over valve 17 and right supporting leg revenue and expenditure oil cylinder 10,5th actuator port A7, the 6th actuator port B7 hydraulic fluid port of change-over valve 17 are connected with the first hydraulic fluid port D3, the second hydraulic fluid port D4 of right supporting leg balance cock 23 respectively, and the 3rd hydraulic fluid port U5, the 4th hydraulic fluid port U6 of right supporting leg balance cock 23 are connected with rod chamber with the rodless cavity of right supporting leg revenue and expenditure oil cylinder 10 respectively.
In one embodiment, can arrange multiple pressure sensor, the second pressure sensor 9, first pressure sensor 8 is connected with the first hydraulic fluid port D1 of left branch leg balance cock 22, the second hydraulic fluid port D2 hydraulic fluid port respectively; Control setup is electrically connected with the second pressure sensor 9, first pressure sensor 8 respectively.3rd hydraulic fluid port U1, the 4th hydraulic fluid port U2 of left branch leg balance cock 22 are connected with the 4th pressure sensor 12, the 3rd pressure sensor 11 respectively.Control setup is connected with the 3rd pressure sensor 11, the 4th pressure sensor 12 respectively.
First hydraulic fluid port D3, the second hydraulic fluid port D4 of right supporting leg balance cock 23 are connected with the 6th pressure sensor 14, the 5th pressure sensor 13 respectively.Control setup is connected with the 6th pressure sensor 14, the 5th pressure sensor 13 respectively.3rd hydraulic fluid port U5, the 4th hydraulic fluid port U6 of right supporting leg balance cock 23 are connected with the 8th pressure sensor 16, the 7th pressure sensor 15 respectively.Control setup is connected with the 7th pressure sensor 15, the 8th pressure sensor 16 respectively.Left branch leg pressure switch 6, the right supporting leg pressure switch 24 that puts in place that puts in place is connected with the 3rd hydraulic fluid port U1 of left branch leg balance cock 22, the 3rd hydraulic fluid port U5 of right supporting leg balance cock 23 respectively.
The return opening of the oil return inlet T 10 of priority valve module 18, the oil return inlet T 11 of supporting leg operating handle 1, change-over valve 17 is connected with hydraulic reservoir 21 respectively.Working barrel 19 is connected with hydraulic reservoir 21 by oil suction filter core 20.Can arrange read out instrument 28, read out instrument 28 is electrically connected with control setup, and read out instrument 28 is also provided with control button, for arranging control command or carrying out system running state and malfunction coefficient.Multiple operation can be set and fault-indicating lamp 29 is electrically connected with control setup.
In one embodiment, the utility model provides a kind of engineering truck, comprises the hydraulic control system of engineering vehicle's supporting legs as above.
The electric control part of the hydraulic control system of engineering vehicle's supporting legs is divided and is comprised supporting leg operating handle 1, electronic control unit 2, supporting leg electrically-controlled valve group 3, swing arm angular transducer 4, swing arm shrinkage limit bit switch 5, left branch leg puts in place pressure switch 6, left branch leg revenue and expenditure oil cylinder 7, first pressure sensor 8, second pressure sensor 9, right supporting leg revenue and expenditure oil cylinder 10, 3rd pressure sensor 11, 4th pressure sensor 12, 5th pressure sensor 13, 6th pressure sensor 14, 7th pressure sensor 15, 8th pressure sensor 16, priority valve module 18, left branch leg balance cock 22, right supporting leg balance cock 23, right supporting leg puts in place pressure switch 24, automobile gear level select switch 25, left branch leg shrinkage limit bit switch 26, right supporting leg shrinkage limit bit switch 27.
Fig. 4 is the schematic flow sheet of the control method of an embodiment of electrohydraulic control system according to engineering vehicle's supporting legs of the present utility model, as shown in Figure 4:
Step 101, the signal that control setup sends according to engine speed sensor, vehicle drivable position select switch, determines the gear positions of vehicle.
Step 102, the signal that control setup sends according to swing arm angular transducer, swing arm shrinkage limit bit switch, determines lifting angle and the retracted position of swing arm.
Step 103, control setup, based on gear positions, lifting angle and retracted position, transmits control signal to supporting leg electrically-controlled valve group, priority valve module.
In one embodiment, when control setup judges the gear positions of vehicle at neutral gear position, it is electric that control setup output control command makes priority valve module obtain.Control setup detects the angle signal that swing arm angular transducer sends.When judging that the lifting angle value of swing arm is less than or equal to default limited angular threshold value, it is electric that control setup output control command makes priority valve module obtain, and completes supporting leg operating handle fuel feeding.When judging that the lifting angle value of swing arm is greater than default limited angular threshold value, control setup exports control command and makes priority valve module dead electricity, cuts off supporting leg operating handle fuel feeding.
Control setup detects the on-off signal of swing arm shrinkage limit bit switch.When judging that swing arm is in the position of contracting, then control setup sends the control command allowing revenue and expenditure leg to supporting leg electrically-controlled valve group.When judging that swing arm is in extended position, then control setup sends the control command of forbidding revenue and expenditure leg to supporting leg electrically-controlled valve group.
When control setup judges the gear positions of vehicle not at neutral gear position, then control priority valve module dead electricity, make left branch leg revenue and expenditure oil cylinder and right supporting leg revenue and expenditure oil cylinder stop revenue and expenditure action.Control setup judges the position of left and right supporting leg according to left branch leg put in place the signal condition of pressure switch of pressure switch, right supporting leg that puts in place, when control setup judge left and right supporting leg be in condense put time, namely left and right supporting leg is contraction state and triggers left and right supporting leg to put in place pressure switch or limit switch, then export the control command allowing vehicle to travel, when judge left and right supporting leg be in stretch state time, namely do not trigger put in place pressure switch or limit switch of left and right supporting leg and then export the control command of forbidding that vehicle travels.
In one embodiment, gather tach signal as incoming signal by the mode of CAN communication from driving engine, be connected to supporting leg electronic control unit 2, judge system cloud gray model.Simultaneously from automobile gear level select switch 25 collection vehicle drivable position signal as incoming signal, be connected to electronic control unit 2, judge to draw system neutral signal.Swing arm condense the limit switch 5 put on-off signal as input connect electronic control unit 2, put when swing arm is in condense, electronic control unit 2 detectability bit switch signal condition, judges that swing arm is in the position of contracting, thus supporting leg electrically-controlled valve group 3 is sent to the control command allowing revenue and expenditure leg.When swing arm is in extended position, electronic control unit 2 detectability bit switch signal condition, judges swing arm not in the position of contracting, thus sends the control command of forbidding revenue and expenditure leg to supporting leg electrically-controlled valve group 3.
The analog signal of the angular transducer 4 of moved arm lifting connects electronic control unit 2 as input, electronic control unit 2 carries out data processing to the analog signal of angular transducer automatically, be converted into the digital quantity signal of angle value, judge the angle of moved arm lifting, when the angle value of moved arm lifting is less than or equal to the angle value of Pa systemic presupposition supporting leg limit movement, electronic control unit 2 export control command make priority valve module 18 electric, complete supporting leg operating handle fuel feeding.When the angle value of moved arm lifting is greater than Pa (angle value of systemic presupposition supporting leg limit movement), electronic control unit 2 exports control command and makes priority valve module 18 dead electricity, cuts off supporting leg operating handle fuel feeding.
In one embodiment, tach signal is gathered from driving engine by the mode of CAN communication, simultaneously from automobile gear level select switch 25 collection vehicle drivable position signal, gather the analog signal of moved arm lifting angular transducer 4 and the status signal of swing arm contracting position limit switch 5 in restriction supporting leg movement device, gather the status signal of left branch leg shrinkage limit bit switch 26, right supporting leg shrinkage limit bit switch 27, supporting leg electronic control unit 2 is connected to as input, as shown in Figure 5,6:
Step 201, electronic control unit 2 judges system cloud gray model according to engine of engineering vehicle tach signal, judges from automobile gear level select switch 25 gear signal that vehicle travels.
Step 202, determines whether that neutral gear travels, if yes then enter step 203.
Step 203, when vehicle running signal is at neutral gear position, operation supporting leg handle 1 revenue and expenditure leg, whether the angle value detecting moved arm lifting is less than or equal to Pa (angle value of systemic presupposition supporting leg limit movement), if, then enter step 204, electronic control unit 2 exports to obtain electric signal to priority valve module 18.
Step 205, detects swing arm and whether condenses the limit switch 5 put in contracting state, if so, then enter step 206, step 206, control supporting leg electrically-controlled valve group 3 electric, drive left branch leg revenue and expenditure oil cylinder 7 and right supporting leg revenue and expenditure oil cylinder 10 to make the action of revenue and expenditure leg.Detect swing arm and condense the limit switch 5 put in the state of stretching, control supporting leg electrically-controlled valve group 3 dead electricity, left branch leg revenue and expenditure oil cylinder 7 and right supporting leg revenue and expenditure oil cylinder 10 stop the action of revenue and expenditure leg, when the angle value of detection moved arm lifting is greater than Pa (angle value of systemic presupposition supporting leg limit movement), priority valve module 18 dead electricity, left branch leg revenue and expenditure oil cylinder 7 and right supporting leg revenue and expenditure oil cylinder 10 stop the action of revenue and expenditure leg.
Operation supporting leg handle 1 supporting leg, when the angle value of detection moved arm lifting is less than or equal to Pa (angle value of systemic presupposition supporting leg limit movement), electronic control unit 2 exports to obtain electric signal to priority valve module 18, left branch leg revenue and expenditure oil cylinder 7 and right supporting leg revenue and expenditure oil cylinder 10 is driven to make the action of a supporting leg, the angle value detecting moved arm lifting is greater than the angle value of Pa systemic presupposition supporting leg limit movement) time, priority valve module 18 dead electricity, left branch leg revenue and expenditure oil cylinder 7 and right supporting leg revenue and expenditure oil cylinder 10 stop the action of a supporting leg.
When vehicle running signal is not at neutral gear position, priority valve module 18 dead electricity, left branch leg revenue and expenditure oil cylinder 7 and right supporting leg revenue and expenditure oil cylinder 10 stop revenue and expenditure action.
Step 301, detects the signal condition of left branch leg shrinkage limit bit switch 26, right supporting leg shrinkage limit bit switch 27, judges that whether supporting leg is put condensing.
Step 302, electronic control unit 2 is judged that supporting leg is in condense and is put (position after contraction), exports the control command allowing vehicle to travel.
Step 303, if judge, supporting leg is in stretches (going out) state, and export and forbid the control command that vehicle travels, this function, mainly when operator's maloperation, avoids vehicle to occur the danger of tumbling, and avoids the safety improving car load.
The control method of the hydraulic control system based on engineering vehicle's supporting legs as above in above-described embodiment, the sensor signal precision gathered is high, through the data processing of high speed algorithm, to the accuracy of judgement of the actual condition of engineering truck, response is fast, error is little, and steerability is strong, and operator is simple to operate, the high-risk fault that operator's maloperation causes can be avoided, improve the safety of car load, reduce the fault rate of car load, decrease maintenance rate.
The utility model provides a kind of method of inspection of the hydraulic control system based on engineering vehicle's supporting legs as above, comprise: control setup receives the pressure signal into and out of hydraulic fluid port of left and right supporting leg balance cock that pressure sensor sends, according to pressure signal obtain left and right supporting leg balance cock into and out of hydraulic fluid port force value; Force value and the pressure threshold preset are compared, judges whether breaking down into and out of hydraulic fluid port of left and right supporting leg balance cock, if so, then export corresponding failure message.
In one embodiment, control setup receives the pressure signal of the first pressure sensor, the second pressure sensor, the 3rd pressure sensor, the 4th pressure sensor transmission.According to the force value of the first hydraulic fluid port of pressure signal determination left branch leg balance cock, the second hydraulic fluid port, the 3rd hydraulic fluid port, the 4th hydraulic fluid port.The force value of the first hydraulic fluid port of left branch leg balance cock, the second hydraulic fluid port, the 3rd hydraulic fluid port, the 4th hydraulic fluid port and the pressure threshold preset are compared, judge whether the first hydraulic fluid port of left branch leg balance cock, the second hydraulic fluid port, the 3rd hydraulic fluid port, the 4th hydraulic fluid port break down, if so, then corresponding failure message is exported.
Control setup receives the pressure signal of the 5th pressure sensor, the 6th pressure sensor, the 7th pressure sensor, the 8th pressure sensor transmission.The force value of the first hydraulic fluid port of right supporting leg balance cock, the second hydraulic fluid port, the 3rd hydraulic fluid port, the 4th hydraulic fluid port is determined according to pressure signal.The force value of the first hydraulic fluid port of right supporting leg balance cock, the second hydraulic fluid port, the 3rd hydraulic fluid port, the 4th hydraulic fluid port and the pressure threshold preset are compared, judge whether the first hydraulic fluid port of right supporting leg balance cock, the second hydraulic fluid port, the 3rd hydraulic fluid port, the 4th hydraulic fluid port break down, if so, then corresponding failure message is exported.
As shown in Fig. 7 to 10, the parts for carrying out detecting comprise the first pressure sensor 8, second pressure sensor 9, the 3rd pressure sensor 11, the 4th pressure sensor 12, the 5th pressure sensor 13, the 6th pressure sensor 14, the 7th pressure sensor 15, the 8th pressure sensor 16.
Parameter P1 is the force value that the first pressure sensor 8 detects, parameter P2 is the force value that the second pressure sensor 9 detects, parameter P3 is the force value that the 3rd pressure sensor 11 detects, parameter P4 is the force value that the 4th pressure sensor 12 detects, parameter P5 is the force value that the 5th pressure sensor 13 detects, parameter P6 is the force value that the 6th pressure sensor 14 detects, and parameter P7 is the force value that the 7th pressure sensor 15 detects, and parameter P8 is the force value that the 8th pressure sensor 16 detects.
The analog signal parameter value P1 of left branch leg balance cock 22 and right supporting leg balance cock 23 detected pressures sensor, P2, P3, P4, P5, P6, P7, P8, electronic control unit 2 is connected to as input, electronic control unit 2 passes through self-check program, judge sensor component fault Error1, Error2, Error3, Error4, Error5, Error6, Error7, Error8, electronic control unit 2 carries out data processing to the analog signal of these inputs automatically by algorithm simultaneously, and be converted into the digital quantity signal of force value, judgement is compared respectively with the force value of systemic presupposition balance cock fault, thus draw left branch leg balance cock 22 fault Error9, Error10, Error11, Error12, Error13, Error14 and right supporting leg balance cock 23 fault Error15, Error16, Error17, Error18, Error19, Error20.
Sensor component fault Error1, Error2, Error3, Error4, Error5, Error6, Error7, Error8 and supporting leg balance cock fault Error9, Error10, Error11, Error12, Error13, Error14, Error15, Error16, Error17, Error18, Error19, Error20 are the defeated out of order program parameter values of electronic control unit 2.First pressure sensor 8, second pressure sensor 9, the 3rd pressure sensor 11, the 4th pressure sensor 12 are comprised to the parts of the detection that left branch leg balance cock 22 carries out.
Step 401, after system electrification, the analog signal parameter value P1 of left branch leg balance cock 22 pressure sensor, P2, P3, P4, electronic control unit 2 is connected to as input, electronic control unit 2 passes through self-check program, judge the whether short circuit of external pressure transducer devices, open circuit, output transducer device fault Error1, Error2, Error3, Error4.
Step 402,403, after first pressure sensor 8, second pressure sensor 9, the 3rd pressure sensor 11, the 4th pressure sensor 12 units test trouble free, electronic control unit 2 carries out data processing to pressure sensor analog signal P1, P2, P3, P4 automatically by algorithm, is converted into the digital quantity signal of force value.
Step 404,405, when pressure sensor analog signal parameter value P3 force value is greater than the establishment of Pmax_L (the U2 hydraulic fluid port maximum safety pressure force value of systemic presupposition left branch leg balance cock 22) condition, electronic control unit 2 automatically monitoring exports left branch leg balance cock 22 fault Error9, condition is false, and trouble free exports.
When pressure sensor analog signal parameter value P2 force value is greater than P2 ' (the D1 hydraulic fluid port systemic presupposition force value of left branch leg balance cock 22) and pressure sensor analog signal parameter value P1 force value is greater than the establishment of P1 ' (the D2 hydraulic fluid port systemic presupposition force value of left branch leg balance cock 22) condition, electronic control unit 2 automatically monitoring exports left branch leg balance cock 22 fault Error14, condition is false, and trouble free exports.
Step 501, when pressure sensor analog signal parameter value P1 force value is greater than P1 ' (the D2 hydraulic fluid port systemic presupposition force value of left branch leg balance cock 22) and pressure sensor analog signal parameter value P2 force value carry out step 502 under being less than P2 ' (the D1 hydraulic fluid port systemic presupposition force value of left branch leg balance cock 22) condition.
Step 502, judge that the difference of pressure of pressure sensor analog signal parameter value P1 and pressure sensor analog signal parameter value P3 is compared with Pr1 (left branch leg balance cock 22 systemic presupposition 1 force value), when being greater than Pr1 (left branch leg balance cock 22 systemic presupposition 1 force value), carry out step 504, electronic control unit 2 exports left branch leg balance cock 22 fault Error10; When being less than or equal to Pr1 (left branch leg balance cock 22 systemic presupposition 1 force value), left branch leg balance cock 22 trouble free;
Step 503, judge that pressure sensor analog signal parameter value P4 and P4 ' (the U1 hydraulic fluid port systemic presupposition force value of left branch leg balance cock 22) compares simultaneously, when being less than or equal to P4 ' (the U1 hydraulic fluid port systemic presupposition force value of left branch leg balance cock 22), carry out step 505.
Step 505, electronic control unit 2 exports left branch leg balance cock 22 fault Error11, when being greater than P4 ' (the U1 hydraulic fluid port systemic presupposition force value of left branch leg balance cock 22), left branch leg balance cock 22 trouble free.
Step 601, under pressure sensor analog signal parameter value P2 force value is greater than P2 ' (the D1 hydraulic fluid port systemic presupposition force value of left branch leg balance cock 22) and pressure sensor P1 force value is less than P1 ' (the D2 hydraulic fluid port systemic presupposition force value of left branch leg balance cock 22) condition, carry out step 602.
Step 602, judge that the difference of pressure of pressure sensor analog signal parameter value P2 and pressure sensor analog signal parameter value P4 is compared with Pr2 (left branch leg balance cock 22 systemic presupposition 2 force value), when being greater than Pr2 (left branch leg balance cock 22 systemic presupposition 2 force value), carry out step 604.
Step 604, electronic control unit 2 exports left branch leg balance cock 22 fault Error12, is less than or equal to Pr2 (left branch leg balance cock 22 systemic presupposition 2 force value), left branch leg balance cock 22 trouble free.
Step 603, judge that pressure sensor analog signal parameter value P3 and P3 ' (the U2 hydraulic fluid port systemic presupposition force value of left branch leg balance cock 22) compares simultaneously, when being less than or equal to P3 ' (the U2 hydraulic fluid port systemic presupposition force value of left branch leg balance cock 22), enter step 605.
Step 605, electronic control unit 2 exports left branch leg balance cock 22 fault Error13, when being greater than P3 ' (the U2 hydraulic fluid port systemic presupposition force value of left branch leg balance cock 22), left branch leg balance cock 22 trouble free.
In one embodiment, right supporting leg balance cock 23 comprises the 5th pressure sensor 13, the 6th pressure sensor 14, the 7th pressure sensor 15, the 8th pressure sensor 16 for the parts detected; Judgment mode method is identical with left branch leg balance cock 22 trouble diagnosing, electronic control unit 2 automatic diagnosis can export corresponding pressure sensor component fault Error5, Error6, Error7, Error8, right supporting leg balance cock 23 fault Error15, right supporting leg balance cock 23 fault Error16, right supporting leg balance cock 23 fault Error17, right supporting leg balance cock 23 fault Error18, right supporting leg balance cock 23 fault Error19, right supporting leg balance cock 23 fault Error20, the two judgment mode method is identical.
Wherein, Pmax_R (the U6 hydraulic fluid port maximum safety pressure force value of systemic presupposition right supporting leg balance cock 23), P5 ' (the D4 hydraulic fluid port systemic presupposition force value of right supporting leg balance cock 23), P6 ' (the D3 hydraulic fluid port systemic presupposition force value of right supporting leg balance cock 23), P7 ' (the U6 hydraulic fluid port systemic presupposition force value of right supporting leg balance cock 23), P8 ' (the U5 hydraulic fluid port systemic presupposition force value of right supporting leg balance cock 23), Pr3 (right supporting leg balance cock 23 systemic presupposition 3 force value), Pr4 (right supporting leg balance cock 23 systemic presupposition 4 force value).
The method of inspection of the hydraulic control system based on engineering vehicle's supporting legs as above in above-described embodiment, the sensor signal precision gathered is high, through high speed algorithm process, to the real work situation accuracy of judgement of supporting leg balance cock, response is fast, error is little, and steerability is strong, can extend the service life of balance cock, convenient for maintaining staff, reduce the repair time, reduce the incidence of high-risk accident, improve the safety of system.
The electrohydraulic control system of the engineering vehicle's supporting legs provided in above-described embodiment and engineering truck, engineering vehicle's supporting legs can be made to possess good fine motion and manipulative capability when action at a slow speed, and the sensor signal precision of collection is high, after treatment, to the accurate judgement of the actual condition of engineering truck, response is fast, and error is little, steerability is strong, operator is simple to operate, can avoid operator's maloperation, improves the safety of car load, reduce the fault rate of car load, decrease maintenance rate; And the service life of balance cock can be extended, convenient for maintaining staff, reduce the repair time, reduce the incidence of high-risk accident, improve the safety of control system.
Method and system of the present utility model may be realized in many ways.Such as, any combination by software, hardware, firmware or software, hardware, firmware realizes method and system of the present utility model.Said sequence for the step of method is only to be described, and the step of method of the present utility model is not limited to above specifically described order, unless specifically stated otherwise.In addition, in certain embodiments, also the utility model can be embodied as record program in the recording medium, these programs comprise the machine readable instructions for realizing according to method of the present utility model.Thus, the utility model also covers the recording medium stored for performing the program according to method of the present utility model.
Description of the present utility model provides for the purpose of example and description, and is not exhaustively or by the utility model be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present utility model and practical application are better described, and enables those of ordinary skill in the art understand the utility model thus design the various embodiments with various amendment being suitable for special-purpose.
Claims (10)
1. an electrohydraulic control system for engineering vehicle's supporting legs, is characterized in that, comprising:
Left branch leg revenue and expenditure oil cylinder, right supporting leg revenue and expenditure oil cylinder, supporting leg electrically-controlled valve group, change-over valve, priority valve module, supporting leg operating handle, working barrel and control setup;
The oil outlet of described working barrel is connected with the oil inlet of described priority valve module; The oil outlet of described priority valve module is connected with the oil inlet of described supporting leg operating handle, and the first hydraulic fluid port of described supporting leg operating handle, the 3rd hydraulic fluid port are connected with the first oil inlet of described supporting leg electrically-controlled valve group, the second oil inlet respectively; Second hydraulic fluid port of described supporting leg operating handle, the 4th hydraulic fluid port are connected with the first control port of described change-over valve, the second control port respectively; First oil outlet of described supporting leg electrically-controlled valve group, the second oil outlet are connected with the first actuator port of described change-over valve, the second actuator port respectively; 3rd actuator port, the 4th actuator port of described change-over valve are connected with rod chamber with the rodless cavity of described left branch leg revenue and expenditure oil cylinder respectively; 5th actuator port, the 6th actuator port of described change-over valve are connected with rod chamber with the rodless cavity of described right supporting leg revenue and expenditure oil cylinder respectively;
Described control setup is electrically connected with described supporting leg electrically-controlled valve group, described priority valve module respectively.
2. electrohydraulic control system as claimed in claim 1, is characterized in that:
Also comprise: left branch leg balance cock and right supporting leg balance cock;
Described left branch leg balance cock is arranged in the oil circuit between described change-over valve and described left branch leg revenue and expenditure oil cylinder, 3rd actuator port of described change-over valve, the 4th actuator port are connected with the first hydraulic fluid port of described left branch leg balance cock, the second hydraulic fluid port respectively, and the 3rd hydraulic fluid port, the 4th hydraulic fluid port of described left branch leg balance cock are connected with rod chamber with the rodless cavity of described left branch leg revenue and expenditure oil cylinder respectively; Described right supporting leg balance cock is arranged in the oil circuit between described change-over valve and described right supporting leg revenue and expenditure oil cylinder, 5th actuator port of described change-over valve, the 6th actuator port are connected with the first hydraulic fluid port of described right supporting leg balance cock, the second hydraulic fluid port respectively, and the 3rd hydraulic fluid port, the 4th hydraulic fluid port of described right supporting leg balance cock are connected with rod chamber with the rodless cavity of described right supporting leg revenue and expenditure oil cylinder respectively.
3. electrohydraulic control system as claimed in claim 2, is characterized in that, also comprise:
First pressure sensor, the second pressure sensor; Described second pressure sensor, described first pressure sensor are connected with the first hydraulic fluid port of described left branch leg balance cock, the second hydraulic fluid port respectively; Described control setup is electrically connected with described second pressure sensor, described first pressure sensor respectively.
4. electrohydraulic control system as claimed in claim 3, is characterized in that, also comprise:
3rd pressure sensor, the 4th pressure sensor; 3rd hydraulic fluid port, the 4th hydraulic fluid port of described left branch leg balance cock are connected with described 4th pressure sensor, described 3rd pressure sensor respectively; Described control setup is electrically connected with described 3rd pressure sensor, described 4th pressure sensor respectively.
5. electrohydraulic control system as claimed in claim 4, is characterized in that, also comprise:
5th pressure sensor, the 6th pressure sensor; First hydraulic fluid port, second hydraulic fluid port of described right supporting leg balance cock are connected with described 6th pressure sensor, described 5th pressure sensor respectively; Described control setup is electrically connected with described 6th pressure sensor, described 5th pressure sensor respectively.
6. electrohydraulic control system as claimed in claim 5, is characterized in that, also comprise:
7th pressure sensor, the 8th pressure sensor; 3rd hydraulic fluid port, the 4th hydraulic fluid port of described right supporting leg balance cock are connected with described 8th pressure sensor, described 7th pressure sensor respectively; Described control setup is electrically connected with described 7th pressure sensor, described 8th pressure sensor respectively.
7. electrohydraulic control system as claimed in claim 6, is characterized in that, also comprise:
Put in place pressure switch, right supporting leg of left branch leg puts in place pressure switch; Described left branch leg pressure switch, the described right supporting leg pressure switch that puts in place that puts in place is connected with the 3rd hydraulic fluid port of described left branch leg balance cock, the 3rd hydraulic fluid port of described right supporting leg balance cock respectively.
8. electrohydraulic control system as claimed in claim 7, is characterized in that:
Also comprise: hydraulic reservoir, oil suction filter core;
The return opening of described priority valve module, the return opening of described supporting leg operating handle, the return opening of described change-over valve are connected with described hydraulic reservoir respectively; Described working barrel is connected with described hydraulic reservoir by described oil suction filter core.
9. electrohydraulic control system as claimed in claim 1, is characterized in that:
Also comprise: read out instrument, indicator lamp;
Described read out instrument is electrically connected with described control setup; Also be provided with control button on said display means; Described indicator lamp is electrically connected with described control setup.
10. an engineering truck, is characterized in that, comprising:
The electrohydraulic control system of the engineering vehicle's supporting legs as described in claim 1 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520699025.5U CN204978596U (en) | 2015-09-10 | 2015-09-10 | Electro -hydraulic control system and engineering vehicle of machineshop car landing leg |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520699025.5U CN204978596U (en) | 2015-09-10 | 2015-09-10 | Electro -hydraulic control system and engineering vehicle of machineshop car landing leg |
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| Publication Number | Publication Date |
|---|---|
| CN204978596U true CN204978596U (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520699025.5U Withdrawn - After Issue CN204978596U (en) | 2015-09-10 | 2015-09-10 | Electro -hydraulic control system and engineering vehicle of machineshop car landing leg |
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| Country | Link |
|---|---|
| CN (1) | CN204978596U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105035041A (en) * | 2015-09-10 | 2015-11-11 | 徐工集团工程机械股份有限公司科技分公司 | Engineering truck support leg electrohydraulic control system, method, detection method and engineering truck |
-
2015
- 2015-09-10 CN CN201520699025.5U patent/CN204978596U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105035041A (en) * | 2015-09-10 | 2015-11-11 | 徐工集团工程机械股份有限公司科技分公司 | Engineering truck support leg electrohydraulic control system, method, detection method and engineering truck |
| CN105035041B (en) * | 2015-09-10 | 2017-06-06 | 徐工集团工程机械股份有限公司科技分公司 | The electrohydraulic control system of engineering vehicle's supporting legs, method, detection method and engineering truck |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160120 Effective date of abandoning: 20170606 |
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| AV01 | Patent right actively abandoned |