CN213899452U - Concrete pump truck and parallel control stirring cleaning heat dissipation hydraulic system thereof - Google Patents
Concrete pump truck and parallel control stirring cleaning heat dissipation hydraulic system thereof Download PDFInfo
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- CN213899452U CN213899452U CN202121182974.8U CN202121182974U CN213899452U CN 213899452 U CN213899452 U CN 213899452U CN 202121182974 U CN202121182974 U CN 202121182974U CN 213899452 U CN213899452 U CN 213899452U
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Abstract
The utility model discloses a parallel control stirring washs heat dissipation hydraulic system, including the oil absorption filter, the oil-out of oil absorption filter and the oil inlet intercommunication of dual gear pump, dual gear pump includes coaxial driven first gear pump and second gear pump, the oil-out of first gear pump washs the combination valve through the stirring and gives stirring motor and water pump motor oil supply respectively, the fan motor oil supply of integrated temperature control valve hydraulic oil cooler is given to the oil-out of second gear pump, the stirring motor, get back to hydraulic tank after the radiator device heat dissipation of integrated temperature control valve hydraulic oil cooler behind the oil-out confluence of water pump motor and fan motor. The utility model discloses still disclose a concrete pump truck including above-mentioned parallel control stirring washing heat dissipation hydraulic system. The utility model provides a pair of concrete pump truck and parallel control stirring washs heat dissipation hydraulic system realizes the parallel independent control of stirring motor, water pump motor and fan motor, can overcome the interference defect of influencing mutually between the three.
Description
Technical Field
The utility model relates to a concrete pump truck and parallel control stirring washs heat dissipation hydraulic system thereof belongs to concrete pump truck and improves technical field.
Background
The concrete pump truck is high-efficiency concrete pumping equipment, and is widely applied to building construction due to the advantages of flexible distribution, easy factory transfer and the like. The stirring and cleaning heat dissipation hydraulic system is an important component of a hydraulic system of a concrete pump truck and assists in completing pumping construction operation of the concrete pump truck.
At present, a stirring cleaning and heat dissipating system for a concrete pump truck in the industry adopts a single gear pump to supply oil for the stirring cleaning and heat dissipating system, and a stirring motor, a water pump motor and a fan motor are sequentially connected in series in a loop to be controlled. The existing single-gear pump oil supply system controls a stirring motor, a water pump motor and a fan motor in a serial loop, influences and interferes mutually, and cannot work normally at the same time. Meanwhile, the pumping and swinging hydraulic systems of the concrete pump truck are high-pressure large-flow hydraulic systems, so that the heating value of a pumping loop during working is large, and the requirement on heat balance cannot be met, and therefore the concrete pump truck is additionally provided with corresponding heat dissipation devices and systems. Because the pumping and swing hydraulic system, instantaneous flow reaches higher level, aluminium system finned radiator and system can't increase to in pumping and swing system, and stirring cleaning system supplies oil for the gear pump, and the flow is stable, and pressure is lower, therefore current radiator device all sets up in stirring cleaning circuit. Because the existing serial stirring and cleaning systems are all single-gear pumps, the flow is small, the flow passing through the radiator device is low, the radiating power of the hydraulic system of the concrete pump truck is low, and particularly under the high-temperature strong sunshine environment, the temperature of hydraulic oil of the concrete pump truck can reach the warning level, and even the risk that the pumping shutdown cannot be constructed is caused.
At present, a single gear pump is adopted in a stirring, cleaning and heat dissipation hydraulic system of a concrete pump truck to supply oil to the stirring, cleaning and heat dissipation system, and an actuating element stirring motor, a water pump motor and a fan motor are sequentially connected in series in a loop. The existing stirring and cleaning heat dissipation hydraulic system has the following defects and risks: 1. stirring motor, water pump motor, fan motor can not normally work simultaneously: a single hydraulic return oil has more series execution elements, and the three execution elements mutually influence and interfere due to different working pressures (stirring motor, fan motor and water pump motor). In the actual work of the stirring motor, the water pump motor and the fan motor, at most two execution elements are selected to work, otherwise, the faults of weak stirring, insufficient water yield of the water pump and the like can be caused.
2. The output torque and the working allowance of the stirring motor are small, the power of the stirring blade is insufficient, and particularly, the clamping stagnation fault and the risk caused by the weakness of the stirring blade exist when poor concrete is pumped. Because the rated pressure and the working pressure of the stirring motor are the maximum, the hydraulic circuit is positioned in front of the water pump motor and the fan motor, the pressure of the three motors is continuously accumulated when the three motors work simultaneously, and the inlet pressure of the stirring motor can reach a higher level. The maximum working pressure of a gear pump applied in the industry is certain, so that the set pressure of an overflow valve in a system cannot be too high, the working allowance of a stirring motor is small, the effective output torque allowance is small, the clamping stagnation of stirring blades is caused, the phenomenon of frequent reversal occurs, and the pumping construction efficiency is seriously influenced.
3. The flow participating in heat dissipation in the heat dissipation system is small, and the heat dissipation power of the whole machine is low. In order to improve the reliability and the safety of the heat dissipation device, the radiators are arranged on the stirring cleaning loop. Because the existing serial stirring and cleaning system is a single-gear pump, the flow is small, the flow passing through the radiator device is low, the radiating power of the hydraulic system of the concrete pump truck is low, and particularly under the high-temperature strong sunshine environment, the temperature of hydraulic oil of the concrete pump truck can reach the warning level, and even the risk that the pumping shutdown cannot be constructed is caused.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art defect, provide one kind and realize stirring motor, water pump motor and the parallel independent control of fan motor, can overcome the concrete pump truck and the parallel control stirring of the interference defect of influencing each other between the three and wash heat dissipation hydraulic system.
In order to solve the technical problem, the utility model discloses a technical scheme does: the utility model provides a parallel control stirring washs heat dissipation hydraulic system, includes the oil absorption filter, the oil inlet and the hydraulic tank of oil absorption filter are connected, the oil-out of oil absorption filter and the oil inlet intercommunication of dual gear pump, dual gear pump includes coaxial driven first gear pump and second gear pump, the oil-out of first gear pump washs the combination valve through the stirring and gives stirring motor and water pump motor fuel feeding respectively, the oil-out of second gear pump gives integrated temperature control valve hydraulic cooler's fan motor fuel feeding, the oil-out of stirring motor, water pump motor and fan motor is passed through after the confluence get back to after integrated temperature control valve hydraulic cooler's the radiator device heat dissipation hydraulic tank.
The stirring and cleaning combined valve comprises a first electromagnetic directional valve and a second electromagnetic directional valve, an oil outlet of the first gear pump is connected with an oil inlet of the stirring motor through the first electromagnetic directional valve, an oil outlet of the stirring motor is connected with an oil inlet of the second electromagnetic directional valve through the first electromagnetic directional valve, one oil outlet of the second electromagnetic directional valve is connected with an oil inlet of the water pump motor, and the other oil outlet of the second electromagnetic directional valve is connected with the hydraulic oil tank.
And an oil inlet of the stirring motor is connected with a pressure switch, the pressure switch is connected with a controller, and the controller is connected with the first electromagnetic directional valve.
And an oil outlet of the first gear pump is connected with a pressure gauge.
An oil outlet of the first gear pump is connected with one end of a first overflow valve, and the other end of the first overflow valve is connected with an oil inlet of the second electromagnetic directional valve.
The oil inlet of the second electromagnetic directional valve is connected with one end of a second overflow valve, the other end of the second overflow valve is connected with the hydraulic oil tank, the integrated temperature control valve hydraulic oil cooler comprises a third electromagnetic directional valve, and two ends of the third electromagnetic directional valve are respectively connected with the oil inlet and the oil outlet of the fan motor.
A concrete pump truck comprises the parallel control stirring cleaning heat dissipation hydraulic system.
The utility model has the advantages that: 1. the parallel independent control stirring, cleaning and heat dissipation system adopts the coaxial driving of the duplicate gear pump and supplies oil in parallel, and compared with two independent gear pumps, the parallel independent control stirring, cleaning and heat dissipation system is compact in structure and convenient to space layout and maintain. And meanwhile, the duplex gear pumps share the oil absorption, so that the system and the pipeline connection are simplified.
2. The double gear pump supplies oil for the stirring cleaning oil return and the heat dissipation loop in parallel, and the stirring motor, the water pump motor and the fan motor of the three executing elements are independently controlled in parallel, so that the independent control and work of stirring, cleaning and heat dissipation are realized. The stirring cleaning system is supplied with oil by one gear pump of the double gear pump, the stirring motor and the water pump motor are connected in series in the loop for series control, and the stirring motor is less influenced due to the smaller working pressure of the water pump motor and is not frequently used, so that the independent control of the stirring motor and the water pump motor can be realized. In the heat radiation system, the other gear pump of the double gear pump supplies oil, the operation of the fan motor and the fan is independently controlled, and the operation and the stirring and cleaning functions are independent and do not interfere with each other and influence each other.
3. In the stirring cleaning loop, because the water pump motor is not frequently used, the stirring motor is solely supplied with oil by the gear pump, and the accumulation of the working pressure between the executing elements does not exist in the loop, so that the stirring motor can obtain larger working pressure to output torque, the stirring power of the stirring shaft is improved, the concrete stirring is more uniform, the suction efficiency of the pumping equipment is improved, and the applicability of the pumping equipment is stronger.
4. The double gear pump supplies oil for the stirring cleaning heat dissipation system, the stirring cleaning loop and the return oil of the heat dissipation system loop are combined and enter the radiator device to dissipate heat, the heat dissipation flow of the radiator device is increased, the system heat dissipation efficiency is higher than that of the existing product, and the heat balance and stability of the hydraulic system of the whole machine are improved.
5. The working time of a fan motor of a heat dissipation system in pumping construction is large, the fan motor is controlled in a reverse control mode through an electromagnetic reversing valve for integrated control, the aging of elements is slowed down, and the service life of the electromagnetic reversing valve is prolonged. The fan motor control electromagnetic valve is reversely controlled, namely the coil is set to work when in a power-off state, and the coil is set to work when in a power-on state. When the pumping equipment is started, the hydraulic oil temperature is low, the fan motor controls the electromagnetic valve coil to be electrified at the moment, and because the oil temperature of the hydraulic system is low, heat generated by electrifying the electromagnetic valve coil is easily taken away by hydraulic oil with low temperature. Along with pumping equipment uses, the hydraulic oil temperature rises gradually, and when the hydraulic oil temperature reached the settlement temperature, the hydraulic oil temperature was higher this moment, and especially the heat that solenoid valve coil circular telegram produced was difficult to distribute or transmit away under the strong sunshine environment of high temperature, causes the solenoid valve to burn out or other trouble easily, and the coil outage sets up to the fan beginning work this moment of reverse control mode, improves solenoid valve component reliability, increase of service life.
Drawings
FIG. 1 is a schematic diagram of a connection structure of a parallel control stirring cleaning heat dissipation hydraulic system of the present invention;
fig. 2 and 3 are schematic views of alternative connection structures of the present invention;
the reference numbers in the figures are as follows: 1-an oil absorption filter; 2-double gear pump; 3-stirring and cleaning the combined valve; 4-a stirring motor; 5-water pump motor; 6-an integrated temperature control valve hydraulic oil cooler; 7-stirring a control valve; 8-cleaning the control valve; 21-a first gear pump; 22-a second gear pump; 31-a first electromagnetic directional valve; 32-a second electromagnetic directional valve; 33-a pressure switch; 34-a pressure gauge; 35-a first overflow valve; 36-a second relief valve; 61-a fan motor; 62-a heat sink device; 63-a third electromagnetic directional valve.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and the following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the utility model discloses a parallel control stirring washs heat dissipation hydraulic system, including oil absorption filter 1, oil absorption filter 1's oil inlet is connected with hydraulic tank, oil absorption filter 1's oil-out and duplicate gear pump 2's oil inlet intercommunication. The double gear pump 2 comprises a first gear pump 21 and a second gear pump 22 which are coaxially driven, the first gear pump 21 and the second gear pump 22 share one oil suction port, oil is sucked through the oil suction filter 1, and parallel oil supply is performed for the stirring and cleaning system.
The utility model discloses well stirring motor and control and fan motor and control set up respectively in two different return circuits. In the stirring cleaning loop, a stirring motor and a water pump motor are connected in series in the loop for control. Stirring and cleaning adopt an integrated control unit form, wherein a stirring motor and a control are arranged in front, and a water pump motor and a control are arranged behind. Specifically, the oil outlet of the first gear pump 21 supplies oil to the stirring motor 4 and the water pump motor 5 through the stirring and cleaning combination valve 3, and the stirring motor 4 and the water pump motor 5 are controlled to work, so that the functions of stirring concrete and cleaning are achieved. An oil outlet of the second gear pump 22 supplies oil to a fan motor 61 of the integrated temperature control valve hydraulic oil cooler 6 to drive the fan motor 61 to work, so that the heat dissipation function of the hydraulic system is achieved. The oil outlets of the stirring motor 4, the water pump motor 5 and the fan motor 61 are converged, and then the converged oil is cooled by a radiator device 62 of the integrated temperature control valve hydraulic oil cooler 6 and then returns to the hydraulic oil tank. The fan motor in the loop of the heat dissipation system supplies oil to the independent gear pump for driving, the return oil of the loop and the stirring cleaning loop are converged and enter the heat dissipation device for heat dissipation, and the return oil returns to the hydraulic oil tank to participate in the circulation of the hydraulic system after heat dissipation.
The stirring and cleaning combined valve 3 comprises a first electromagnetic directional valve 31, a second electromagnetic directional valve 32, a pressure switch 33 and a pressure gauge 34. An oil outlet of the first gear pump 21 is connected with an oil inlet of the stirring motor 4 through a first electromagnetic directional valve 31, and an oil outlet of the stirring motor 4 is connected with an oil inlet of a second electromagnetic directional valve 32 through the first electromagnetic directional valve 31. An oil inlet of the stirring motor 4 is connected with a pressure switch 33, the pressure switch 33 is connected with a controller, and the controller is connected with the first electromagnetic directional valve 31. First electromagnetic directional valve 31 control stirring motor 4 is just reversing, and opening of second electromagnetic directional valve 32 control water pump 5 stops, and oil feed pressure when pressure switch 33 detects stirring motor 4 corotation, manometer 34 sets up the oil-out at first gear pump 21 for test system pressure. One oil outlet of the second electromagnetic directional valve 32 is connected with the oil inlet of the water pump motor 5, and the other oil outlet is connected with the hydraulic oil tank.
The control principle of the stirring motor 4 is as follows: when the Y1 coil of the first electromagnetic directional valve 31 is energized, the agitation motor 4 rotates forward. When the stirring resistance increases, the oil pressure in the stirring motor 4 increases, and when the pressure reaches the set value P1, the pressure switch 33 is triggered and sends a signal to the controller. The controller controls the energization time T1 of the Y2 coil of the first electromagnetic directional valve 31 and controls the reverse rotation time T1 of the stirring motor 4; after the reverse rotation time T1, the controller controls the Y1 coil of the first electromagnetic directional valve 31 to be energized, and the agitator motor 4 resumes the normal rotation.
The control principle of the water pump motor 5 is as follows: the return oil of the stirring motor 4 enters the second electromagnetic directional valve 32 through the first electromagnetic directional valve 31, and the second electromagnetic directional valve 32 controls the water pump motor 5 to work. When the coil Y3 of the second electromagnetic directional valve 32 is energized, the water pump motor 5 operates to perform a washing function. The return oil from the water pump motor 5 enters the radiator device 62 to be radiated and then returns to the oil tank.
The utility model discloses in, the oil-out of first gear pump 21 even has the one end of first overflow valve 35, and the other end and the 32 oil inlets of second electromagnetic directional valve of first overflow valve 35 are connected, and first overflow valve 35 is used for protecting for agitator motor 4. An oil inlet of the second electromagnetic directional valve 32 is connected with one end of a second overflow valve 36, and the other end of the second overflow valve 36 is connected with a hydraulic oil tank for protecting the water pump motor 5.
The integrated temperature control valve hydraulic oil cooler 6 comprises a third electromagnetic directional valve 63, and two ends of the third electromagnetic directional valve 63 are respectively connected to an oil inlet and an oil outlet of the fan motor 61. The third electromagnetic directional valve 63 is in a reverse control mode, that is, the coil is set to be in a power-off state in which the fan motor operates, and the coil is set to be in a power-on state in which the fan motor does not operate.
The working principle of the fan motor 6 is as follows: the second gear pump 22 supplies oil to the fan motor 61 of the heat radiation system. The third electromagnetic directional valve 63 controls the start and stop of the fan motor 61, so that the heat dissipation of the hydraulic system is realized. The hydraulic oil enters the radiator device 62 for heat radiation through the stirring and cleaning combination valve 3 and the return oil in the stirring motor and water pump motor loop. When the hydraulic system is started, the hydraulic oil temperature is lower than a set value, the controller controls the electromagnetic directional valve coil Y4 to be electrified, the hydraulic oil bypasses through the electromagnetic directional valve, and the fan motor 61 does not work. Because the power of the hydraulic system is high, the hydraulic oil temperature can quickly reach a set value, the controller controls the electromagnetic directional valve coil Y4 to be powered off, and the fan motor 61 works.
In the above circuit, the double gear pump 2 is coaxially driven, and the first gear pump 21 and the second gear pump 22 share the oil suction port for supplying oil, thereby realizing the parallel control of the system. In stirring, water pump motor return circuit, stirring motor 4 long-term work, 5 operating pressure of water pump motor are lower and use often not, therefore water pump motor 5 is less to stirring motor 4 and system's influence, and stirring motor 4 concatenates water pump motor 5 and realizes stirring motor and water pump motor's independent control. In the heat dissipation loop, the heat dissipation time of the hydraulic system is large, the working time of the fan motor 61 is long, the work of the fan motor 61 is controlled in a power-off reverse control mode of the electromagnetic directional valve, the heat generated by a coil of the electromagnetic directional valve is less, and the risk of burning the coil is reduced. In the heat dissipation system, the amount of heat dissipation hydraulic oil is increased, the heat dissipation efficiency of the hydraulic system is improved, and the risk of high shutdown of oil temperature in a high-temperature strong-sunlight environment is reduced.
As shown in fig. 2, in the agitation cleaning circuit, the agitation motor 4 and the water pump motor 5 are controlled in series in the circuit. The stirring and cleaning integrated control unit has separated functions, the stirring motor and the water pump motor are respectively controlled by an independent control unit, and the stirring motor 4 is controlled by a stirring control valve 7; the water pump motor 5 is controlled by a purge control valve 8. The stirring motor 4 and the stirring control valve 7 are in front, and the water pump motor 5 and the cleaning control valve 8 are in back. The fan motor loop supplies oil to the single gear pump, and the return oil of the fan motor loop and the stirring cleaning loop are converged and enter the radiator device for heat dissipation.
As shown in fig. 3, the heat dissipation and the agitation are respectively in two circuits, the heat dissipation fan motor 61 and the water pump motor 5 are in one circuit, and the agitation motor 4 is solely in the other circuit. The fan motor 61 and the water pump motor 5 are connected in series in a loop, the fan motor 61 is controlled at the front, and the water pump motor 5 is controlled at the back. The stirring motor 4 is independently arranged in a loop, and the return oil of the stirring loop and the return oil of the fan stirring motor loop are merged and enter the radiator device for heat dissipation.
The utility model also discloses a concrete pump truck, including above-mentioned parallel control stirring washing heat dissipation hydraulic system.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (8)
1. The utility model provides a parallel control stirring washs heat dissipation hydraulic system which characterized in that: including oil absorption filter (1), the oil inlet and the hydraulic tank of oil absorption filter (1) are connected, the oil-out of oil absorption filter (1) and the oil inlet intercommunication of double gear pump (2), double gear pump (2) are including coaxial driven first gear pump (21) and second gear pump (22), the oil-out of first gear pump (21) is washd combination valve (3) through the stirring and is given stirring motor (4) and water pump motor (5) fuel feeding respectively, the oil-out of second gear pump (22) is given fan motor (61) fuel feeding of integrated temperature control valve hydraulic oil cooler (6), the oil-out of stirring motor (4), water pump motor (5) and fan motor (61) is the warp behind the confluence the heat dissipation of radiator device (62) of integrated temperature control valve hydraulic oil cooler (6) get back to hydraulic tank.
2. The parallel control stirring cleaning radiating hydraulic system according to claim 1, wherein: the stirring and cleaning combined valve (3) comprises a first electromagnetic directional valve (31) and a second electromagnetic directional valve (32), an oil outlet of the first gear pump (21) passes through the first electromagnetic directional valve (31) to be connected with an oil inlet of the stirring motor (4), an oil outlet of the stirring motor (4) passes through the first electromagnetic directional valve (31) to be connected with an oil inlet of the second electromagnetic directional valve (32), an oil outlet of the second electromagnetic directional valve (32) is connected with an oil inlet of the water pump motor (5), and the other oil outlet is connected with the hydraulic oil tank.
3. The parallel control stirring cleaning radiating hydraulic system according to claim 2, characterized in that: an oil inlet of the stirring motor (4) is connected with a pressure switch (33), the pressure switch (33) is connected with a controller, and the controller is connected with the first electromagnetic directional valve (31).
4. The parallel control stirring cleaning radiating hydraulic system according to claim 2, characterized in that: an oil outlet of the first gear pump (21) is connected with a pressure gauge (34).
5. The parallel control stirring cleaning radiating hydraulic system according to claim 2, characterized in that: an oil outlet of the first gear pump (21) is connected with one end of a first overflow valve (35), and the other end of the first overflow valve (35) is connected with an oil inlet of the second electromagnetic directional valve (32).
6. The parallel control stirring cleaning radiating hydraulic system according to claim 2, characterized in that: an oil inlet of the second electromagnetic directional valve (32) is connected with one end of a second overflow valve (36), and the other end of the second overflow valve (36) is connected with the hydraulic oil tank.
7. The parallel control stirring cleaning radiating hydraulic system according to claim 1, wherein: the integrated temperature control valve hydraulic oil cooler (6) comprises a third electromagnetic directional valve (63), and two ends of the third electromagnetic directional valve (63) are respectively connected to an oil inlet and an oil outlet of the fan motor (61).
8. A concrete pump truck is characterized in that: comprising a parallel control agitation cleaning thermal hydraulic system according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121182974.8U CN213899452U (en) | 2021-05-31 | 2021-05-31 | Concrete pump truck and parallel control stirring cleaning heat dissipation hydraulic system thereof |
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| CN202121182974.8U CN213899452U (en) | 2021-05-31 | 2021-05-31 | Concrete pump truck and parallel control stirring cleaning heat dissipation hydraulic system thereof |
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| CN213899452U true CN213899452U (en) | 2021-08-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113894935A (en) * | 2021-10-28 | 2022-01-07 | 中国重汽集团青岛重工有限公司 | Electric control hydraulic intelligent pump mixer truck and control method thereof |
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2021
- 2021-05-31 CN CN202121182974.8U patent/CN213899452U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113894935A (en) * | 2021-10-28 | 2022-01-07 | 中国重汽集团青岛重工有限公司 | Electric control hydraulic intelligent pump mixer truck and control method thereof |
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