CN114412880A - Hydraulic oil replacing system and method and fire fighting truck - Google Patents
Hydraulic oil replacing system and method and fire fighting truck Download PDFInfo
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- CN114412880A CN114412880A CN202111642160.2A CN202111642160A CN114412880A CN 114412880 A CN114412880 A CN 114412880A CN 202111642160 A CN202111642160 A CN 202111642160A CN 114412880 A CN114412880 A CN 114412880A
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- 239000010720 hydraulic oil Substances 0.000 title claims abstract description 281
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000003921 oil Substances 0.000 claims abstract description 538
- 238000007599 discharging Methods 0.000 claims abstract description 8
- 239000010724 circulating oil Substances 0.000 claims description 27
- 230000008569 process Effects 0.000 claims description 7
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/005—Filling or draining of fluid systems
Abstract
The invention provides a hydraulic oil replacing system, a hydraulic oil replacing method and a fire engine, wherein the hydraulic oil replacing system comprises at least two oil supply oil tanks and a controller, wherein the oil supply oil tanks supply oil to a hydraulic system and respectively contain hydraulic oil with different working temperatures; the controller is used for obtaining the current environment temperature, selecting an oil supply oil tank matched with the current environment temperature for supplying oil, and discharging original mixed hydraulic oil in the hydraulic system. The hydraulic oil replacing system can replace hydraulic oil automatically in summer and winter, and simultaneously automatically discharge mixed oil to the outside of the oil tank, thereby avoiding the influence of old hydraulic oil on the performance of new hydraulic oil and reducing the waste amount of hydraulic oil during replacing.
Description
Technical Field
The invention belongs to the technical field of mechanical equipment, and particularly relates to a hydraulic oil replacing system and method and a fire fighting truck.
Background
The fire engine is different along with the geographical position that uses, and the difference in temperature is great in summer and winter season, and along with the change of temperature, the viscidity of hydraulic oil changes greatly, seriously influences the normal use of hydraulic oil, reduces the availability factor of hydraulic oil pump, so need change the hydraulic oil and be applicable to the hydraulic oil under the corresponding operating temperature with hydraulic oil. In order to improve the working efficiency of a hydraulic oil pump, the whole box of hydraulic oil needs to be completely scrapped when the hydraulic oil is replaced, but the hydraulic oil still stays in the service life many times, so that the serious waste of the hydraulic oil is caused.
The fire engine is usually equipped with only one oil supply tank, the hydraulic oil in the oil supply tank automatically flows into the hydraulic oil pump under the negative pressure action of the hydraulic oil pump, then enters the hydraulic pipeline and the hydraulic oil cylinder, and then returns to the oil supply tank through an oil return port, and an oil discharge port is closed in the circulation process of the hydraulic oil; when hydraulic oil needs to be replaced, the oil discharge port is opened, and the hydraulic oil is discharged out of the oil supply tank. When hydraulic oil is replaced, the oil discharge ball valve needs to be opened manually, and oil in the oil supply oil tank is completely drained; the hydraulic oil in the oil supply tank can be drained completely, but the oil in the hydraulic oil pump, the hydraulic pipeline and the hydraulic oil cylinder cannot be drained completely, and when new hydraulic oil is introduced, the original hydraulic oil can flow back to the oil supply tank, so that the new hydraulic oil is polluted, and the performance of the hydraulic oil is influenced.
Disclosure of Invention
The invention mainly aims to provide a hydraulic oil replacing system, a hydraulic oil replacing method and a fire engine, and aims to solve the technical problem that when new hydraulic oil is replaced, old hydraulic oil cannot be completely discharged and pollutes the new hydraulic oil, so that the performance of the new hydraulic oil is influenced.
In order to achieve the above object, the present invention provides a hydraulic oil replacement system for a fire engine, the hydraulic oil replacement system including:
the hydraulic system comprises at least two oil supply tanks, a hydraulic oil tank and a control system, wherein the at least two oil supply tanks supply oil for the hydraulic system and respectively contain hydraulic oil with different working temperatures;
the oil return port of the collecting oil tank is connected with the execution element and used for collecting and discharging mixed hydraulic oil in the oil supply switching process; and
a controller configured to:
and acquiring the current environment temperature, selecting to select the oil supply tank matched with the current environment temperature for supplying oil, and simultaneously discharging mixed hydraulic oil in the hydraulic system in the oil supply switching process.
In an embodiment of the invention, the hydraulic oil replacement system further comprises a collection oil tank, and an oil return port of the collection oil tank is connected with the execution element and used for collecting and discharging mixed hydraulic oil in the oil supply switching process.
In the embodiment of the invention, each oil supply tank is provided with an oil suction port, each oil supply tank and each oil collection tank are provided with an oil return port and an oil discharge port, and each oil port is provided with a control valve for controlling the opening and closing of the corresponding oil port.
In the embodiment of the invention, the oil return ports of the oil supply oil tanks and the oil collection oil tank are communicated with the main oil return path of the hydraulic system through pipelines, and the oil suction ports of the oil supply oil tanks are connected with the hydraulic oil pump.
In an embodiment of the invention, the control valve is a one-way valve.
In an embodiment of the present invention, a hydraulic oil replacing method is further provided, where the hydraulic oil replacing method is applied to the hydraulic oil replacing system described above, and the hydraulic oil replacing method includes:
acquiring the oil path conduction state of each oil tank, and judging the current hydraulic oil flowing mode of the hydraulic system according to the oil path conduction state of each oil tank;
acquiring the current environment temperature, and comparing the current environment temperature with a preset replacement temperature;
and switching the hydraulic oil flow mode of the hydraulic system into a hydraulic oil flow mode matched with the current environment temperature according to the comparison result.
In the embodiment of the invention, the number of the oil supply oil tanks is two, and the two oil supply oil tanks are respectively a normal-temperature oil tank for containing normal-temperature hydraulic oil and a low-temperature oil tank for containing low-temperature hydraulic oil; the step of obtaining the oil path conduction state of each oil tank and judging the current hydraulic oil flow mode of the hydraulic system according to the oil path conduction state of each oil tank comprises the following steps:
when the circulating oil way of the normal-temperature oil tank is conducted and the circulating oil way of the low-temperature oil tank and the oil return oil way of the collecting oil tank are disconnected, the current hydraulic oil flowing mode of the hydraulic system is a normal-temperature hydraulic oil flowing circulating mode;
and when the circulating oil way of the low-temperature oil tank is switched on and the circulating oil way of the normal-temperature oil tank and the oil return oil way of the collecting oil tank are both switched off, the current hydraulic oil flowing mode of the hydraulic system is the low-temperature hydraulic oil flowing circulating mode.
In an embodiment of the present invention, the step of switching the hydraulic oil flow mode of the hydraulic system to the hydraulic oil flow mode matched with the current ambient temperature according to the comparison result includes:
when the current environment temperature is higher than the preset replacement temperature, judging whether the current hydraulic oil flowing mode of the hydraulic system is a normal-temperature hydraulic oil flowing circulation mode or not;
if the current hydraulic oil flowing mode is not the normal-temperature hydraulic oil flowing circulation mode, the oil supply mode is changed into the normal-temperature hydraulic oil supply mode;
when the current environment temperature is lower than a preset replacement temperature, judging whether the current hydraulic oil flow mode of the hydraulic system is a low-temperature hydraulic oil flow circulation mode;
and if the current hydraulic oil flowing mode is not the low-temperature hydraulic oil flowing circulation mode, replacing the oil supply mode with the low-temperature hydraulic oil supply mode.
In an embodiment of the present invention, if the current hydraulic oil flow mode is not the normal temperature hydraulic oil flow circulation mode, the step of replacing the oil supply mode with the normal temperature hydraulic oil supply mode includes:
opening an oil supply oil path of the normal-temperature oil tank and an oil return oil path of the collecting oil tank, and closing a circulating oil path of the low-temperature oil tank and the normal-temperature oil tank and an oil discharge port of the collecting oil tank;
and acquiring an oil product signal in the collecting oil tank in real time, and controlling the working state of the collecting oil tank according to the oil product signal.
In an embodiment of the present invention, the step of acquiring an oil signal in the collection oil tank in real time and controlling the working state of the collection oil tank according to the oil signal includes:
when the oil in the collecting oil tank is pure, the circulating oil way of the normal-temperature oil tank and the oil discharge port of the collecting oil tank are opened, and the circulating oil way of the low-temperature oil tank and the oil return oil way of the collecting oil tank are closed.
In an embodiment of the present invention, if the current hydraulic oil flow mode is not the low-temperature hydraulic oil flow circulation mode, the step of replacing the oil supply mode with the low-temperature hydraulic oil supply mode includes:
opening an oil supply path of the low-temperature oil tank and an oil return path of the collecting oil tank, and closing a circulating oil path of the normal-temperature oil tank, an oil return path of the low-temperature oil tank and an oil discharge port of the collecting oil tank;
and acquiring an oil product signal in the collecting oil tank in real time, and controlling the working state of the collecting oil tank according to the oil product signal.
In an embodiment of the present invention, the step of acquiring the oil signal in the collection oil tank in real time and controlling the working state of the collection oil tank according to the oil signal includes:
when the oil product is pure, the circulating oil path of the low-temperature oil tank and the oil discharge port of the collecting oil tank are opened, and the circulating oil path of the normal-temperature oil tank and the oil return port of the collecting oil tank are closed.
In an embodiment of the present invention, the hydraulic oil replacement method further includes:
and when the service life of the hydraulic oil in the oil supply oil tank is reached, opening an oil discharge port of the oil supply oil tank for oil discharge.
In an embodiment of the invention, the invention further provides a fire fighting truck, and the hydraulic oil in a hydraulic system of the fire fighting truck is replaced by the hydraulic oil replacing method.
Through the technical scheme, the hydraulic oil replacing system and the hydraulic oil replacing method for the fire fighting truck provided by the embodiment of the invention have the following beneficial effects that:
in the hydraulic system, at least two oil supply oil tanks are adopted to supply oil to the hydraulic system, and a plurality of oil supply oil tanks are filled with hydraulic oil with different working temperatures; when hydraulic oil needs to be replaced, the controller acquires current temperature information, selects an oil supply oil tank matched with the current environment temperature according to the current temperature information for supplying oil, and other oil supply oil tanks are in a closed state; when the replaced oil supply tank pumps new hydraulic oil, residual hydraulic oil in pipelines and execution elements of the hydraulic system is collected and discharged, so that old hydraulic oil is discharged completely, and the performance of the new hydraulic oil is prevented from being influenced.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide an understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic structural view of a hydraulic oil replacement system according to the present invention;
FIG. 2 is a schematic flow diagram of a hydraulic oil change method of the present invention;
fig. 3 is a logic control diagram of one embodiment of the hydraulic oil replacement method of the present invention.
Description of the reference numerals
| Reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | Normal |
24 | |
| 11 | First oil return opening | 25 | |
| 12 | First |
26 | Eighth control valve |
| 13 | A first |
30 | Collecting |
| 14 | |
31 | Third |
| 15 | |
32 | Third |
| 16 | Seventh control valve | 33 | |
| 20 | Low- |
34 | |
| 21 | Second |
40 | |
| 22 | Second oil suction port | L1 | Main |
| 23 | Second |
50 | Actuator element |
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.
The hydraulic oil changing system, method and fire fighting truck according to the invention are described below with reference to the accompanying drawings.
As shown in fig. 1, in an embodiment of the present invention, there is provided a hydraulic oil replacement system including:
the hydraulic system comprises at least two oil supply tanks, a hydraulic oil tank and a control system, wherein the at least two oil supply tanks supply oil for the hydraulic system and respectively contain hydraulic oil with different working temperatures; and
a controller configured to:
and acquiring the current environment temperature, selecting an oil supply oil tank matched with the current environment temperature for supplying oil, and simultaneously discharging mixed hydraulic oil in the hydraulic system in the oil supply switching process.
When collecting the original mixed hydraulic oil in the hydraulic system, an external container may be used for collection and discharge, or a collection oil tank 30 provided on the vehicle may be used for collection, and an oil return port of the collection oil tank 30 is connected to the actuator 50 and used for collecting the mixed hydraulic oil in the oil supply switching process and discharging the mixed hydraulic oil.
In the hydraulic system, at least two oil supply oil tanks are adopted to supply oil to the hydraulic system, and a plurality of oil supply oil tanks are filled with hydraulic oil with different working temperatures; when hydraulic oil needs to be replaced, the controller acquires current temperature information, selects an oil supply oil tank matched with the current environment temperature according to the current temperature information for supplying oil, and other oil supply oil tanks are in a closed state; while the replaced oil supply tank pumps new hydraulic oil, the collecting tank 30 collects and discharges residual hydraulic oil in the pipes of the hydraulic system and the actuator 50, so that the old hydraulic oil is discharged completely, and the performance of the new hydraulic oil is prevented from being affected. The hydraulic oil replacing system can replace hydraulic oil automatically in summer and winter, original hydraulic oil in the hydraulic oil pump 40, the hydraulic oil pipe and the hydraulic oil cylinder is discharged into the collecting oil tank 30, the purity of the input hydraulic oil is detected, if the original hydraulic oil is pure, oil delivery to the collecting oil tank 30 is automatically stopped, and meanwhile, mixed oil is automatically discharged to the outside of the oil tank, so that the waste amount of the hydraulic oil during replacement is reduced, and the cost for replacing the hydraulic oil is reduced; moreover, when the hydraulic oil is replaced, the oil products in the hydraulic oil tanks cannot be polluted mutually, the purity of the oil products is maintained, the normal service cycle of the hydraulic oil is ensured, the hydraulic oil is replaced after the service life is reached, the waste of the hydraulic oil is reduced, and the maintenance cost is reduced; in addition, the hydraulic system uses proper hydraulic oil in different temperature environments, so that the service lives of the hydraulic oil pump 40, the hydraulic oil pipe and the hydraulic oil cylinder can be prolonged, the working efficiency of the hydraulic system is improved, and the maintenance cost is reduced.
In the embodiment of the present invention, each oil supply tank is provided with an oil suction port, each oil supply tank and the collecting oil tank 30 are provided with an oil return port and an oil discharge port, and each oil port is provided with a control valve for controlling the opening and closing of the corresponding oil port.
The oil return ports of the oil supply tanks and the oil collection tank 30 are all communicated with a main oil return path L1 of the hydraulic system through a pipeline, and the oil suction ports of the oil supply tanks are all connected with the hydraulic oil pump 40. The hydraulic oil thus output from the main oil return passage L1 can flow into the respective oil supply tanks and the collecting tank 30 through the oil return ports via the pipes.
Preferably, the control valve is a check valve so that the oil path flow direction of the oil return port or the oil suction port is always maintained in one direction.
In an embodiment of the present invention, a hydraulic oil replacing method is further provided, where the hydraulic oil replacing method is applied to the hydraulic oil replacing system as described above, and as shown in fig. 2, the hydraulic oil replacing method includes:
step S10: acquiring the oil path conduction state of each oil tank, and judging the current hydraulic oil flowing mode of the hydraulic system according to the oil path conduction state of each oil tank;
step S20: acquiring the current environment temperature, and comparing the current environment temperature with a preset replacement temperature;
step S30: and switching the hydraulic oil flow mode of the hydraulic system into a hydraulic oil flow mode matched with the current environment temperature according to the comparison result.
An ambient temperature sensor is adopted to detect and acquire the current ambient temperature of the current hydraulic system in real time and feed back the current ambient temperature to a temperature signal related to a controller, when the controller receives a feedback signal of the environment temperature sensor, the system automatically identifies the hydraulic oil flowing mode (normal temperature hydraulic oil flowing circulation mode or low temperature hydraulic oil flowing circulation mode) of the hydraulic system according to the oil circuit conduction state of each oil tank, after the key replacement permission of an operator is obtained, the hydraulic oil flow mode of the hydraulic system is automatically switched to the hydraulic oil flow mode matched with the current environment temperature, meanwhile, the original old hydraulic oil in the hydraulic oil pump 40, the hydraulic oil pipe and the hydraulic oil cylinder is collected and discharged into the collecting oil tank 30 and finally discharged out of the collecting oil tank 30, therefore, all residual original hydraulic oil can be emptied, and pollution to the replaced hydraulic oil is prevented.
The switching temperature of the normal temperature oil tank 10 and the low temperature oil tank 20 can be set in the controller according to the performance of the used hydraulic oil.
In one embodiment, as shown in fig. 1, the number of the oil supply tanks is two, and the two oil supply tanks are a normal-temperature oil tank 10 containing normal-temperature hydraulic oil and a low-temperature oil tank 20 containing low-temperature hydraulic oil respectively; a first oil suction port 12 and a first oil return port 11 are respectively arranged on the normal-temperature oil tank 10, the first oil suction port 12 is connected with the hydraulic oil pump 40 to achieve the purpose of supplying oil to the hydraulic system, and the first oil return port 11 is connected with a main oil return line L1 through a first branch line; the low-temperature oil tank 20 is provided with a second oil suction port 22 and a second oil return port 21, the second oil suction port 22 is also connected to the hydraulic oil pump 40 to supply oil to the hydraulic system, and the second oil return port 21 is connected to the main oil return path L1 through a second branch line. The collecting oil tank 30 is provided with a third drain port 32 and a third return port 31, and the third return port 31 is connected to a main return oil passage L1 through a third branch line. In order to realize the automatic opening or closing of each oil port, each oil port is provided with a control valve for correspondingly controlling the opening or closing of the oil port; specifically, a first control valve 14 is correspondingly installed at the first oil suction port 12, a second control valve 24 is correspondingly installed at the second oil suction port 22, a fourth control valve 15 is correspondingly installed at the first oil return port 11, a fifth control valve 25 is correspondingly installed at the second oil return port 21, a third control valve 33 is correspondingly installed at the third oil return port 31, and a sixth control valve 34 is correspondingly installed at the third oil discharge port 32.
Further, the step of obtaining the oil passage conduction state of each oil tank and determining the current hydraulic oil flow mode of the hydraulic system according to the oil passage conduction state of each oil tank includes:
step S11: when the circulating oil path of the normal-temperature oil tank 10 is connected and the circulating oil path of the low-temperature oil tank 20 and the oil return oil path of the collecting oil tank 30 are both disconnected, the current hydraulic oil flowing mode of the hydraulic system is a normal-temperature hydraulic oil flowing circulating mode;
step S12: when the circulation oil path of the low-temperature oil tank 20 is on and the circulation oil path of the normal-temperature oil tank 10 and the return oil path of the collection oil tank 30 are both off, the current hydraulic oil flowing mode of the hydraulic system is the low-temperature hydraulic oil flowing circulation mode.
For the cold start state, the controller first determines the valve states of the control valves, and if it is detected that the first control valve 14 and the fourth control valve 15 are in the open states, that is: when the circulation oil path of the normal temperature oil tank 10 is open and the second control valve 24, the third control valve 33, the fifth control valve 25, and the sixth control valve 34 are closed, that is: the circulating oil path of the low-temperature oil tank 20 and the oil return oil path of the collecting oil tank 30 are both disconnected, and at this time, the current hydraulic oil flowing mode of the whole hydraulic system is a normal-temperature hydraulic oil flowing circulating mode;
if the second control valve 24 and the fifth control valve 25 are detected to be in the open state, the following steps are carried out: when the circulation oil path of the low-temperature oil tank 20 is open and the first control valve 14, the third control valve 33, the fourth control valve 15, and the sixth control valve 34 are closed, that is: and the circulating oil path of the normal-temperature oil tank 10 and the oil return path of the collecting oil tank 30 are both disconnected, and at this time, the current hydraulic oil flowing mode of the whole hydraulic system is judged to be the low-temperature hydraulic oil flowing circulating mode.
In an embodiment of the present invention, the step of switching the hydraulic oil flow mode of the hydraulic system to the hydraulic oil flow mode matched with the current ambient temperature according to the comparison result includes:
step S31: when the current environment temperature is higher than the preset replacement temperature, judging whether the current hydraulic oil flowing mode of the hydraulic system is a normal-temperature hydraulic oil flowing circulation mode or not;
step S32: if the current hydraulic oil flowing mode is not the normal-temperature hydraulic oil flowing circulation mode, the oil supply mode is changed into the normal-temperature hydraulic oil supply mode;
step S33: when the current environment temperature is lower than the preset replacement temperature, judging whether the current hydraulic oil flow mode of the hydraulic system is a low-temperature hydraulic oil flow circulation mode;
step S34: and if the current hydraulic oil flowing mode is not the low-temperature hydraulic oil flowing circulation mode, replacing the oil supply mode with the low-temperature hydraulic oil supply mode.
Preferably, in an embodiment, the preset replacement temperature is-10 ℃, when the ambient temperature sensor detects that the current ambient temperature is higher than-10 ℃ in the cold start state, and the controller determines that the whole hydraulic system does not form a normal-temperature hydraulic oil flow circulation mode, the normal-temperature hydraulic oil needs to be replaced and used, the normal-temperature oil tank 10 is started to supply oil to the hydraulic system, and the low-temperature oil tank 20 is forbidden;
when the cold machine is started, the ambient temperature sensor detects that the current ambient temperature is lower than-10 ℃, and the controller judges that the whole hydraulic system does not form a low-temperature hydraulic oil flowing circulation mode, the low-temperature hydraulic oil needs to be replaced and used, the low-temperature oil tank 20 is started to supply oil to the hydraulic system, and the normal-temperature oil tank 10 is forbidden to be used.
In addition, in other embodiments, the preset replacement temperature may be set manually according to the actual situation of the hydraulic oil, and is not limited to the temperature given in the embodiments of the present application.
In an embodiment of the present invention, if the current hydraulic oil flow mode is not the normal temperature hydraulic oil flow circulation mode, the step of replacing the oil supply mode with the normal temperature hydraulic oil supply mode includes:
step S321: opening an oil supply oil path of the normal-temperature oil tank 10 and an oil return oil path of the collecting oil tank 30, and closing a circulating oil path of the low-temperature oil tank 20 and the normal-temperature oil tank 10 and an oil discharge port of the collecting oil tank 30;
step S322: and acquiring an oil product signal in the collecting oil tank 30 in real time, and controlling the working state of the collecting oil tank 30 according to the oil product signal.
When the controller receives a feedback signal of the ambient temperature sensor and gives a prompt that the hydraulic oil tank needs to be replaced, after the replacement permission of an operator is obtained, the controller controls and automatically opens the first control valve 14 and the third control valve 33 so as to open an oil supply line of the normal-temperature oil tank 10 and an oil return line of the collection oil tank 30, and closes the second control valve 24, the fourth control valve 15, the fifth control valve 25 and the sixth control valve 34 so as to close a circulating oil line of the low-temperature oil tank 20 and the normal-temperature oil tank 10 and an oil discharge port of the collection oil tank 30; thus, the normal temperature oil tank 10 starts to pump hydraulic oil to the hydraulic pipeline and the like, and the original low temperature hydraulic oil in the hydraulic oil pump 40, the hydraulic oil pipe and the hydraulic oil cylinder is discharged into the collection oil tank 30 along with the pipeline. Collect oil tank 30 and collect original low temperature hydraulic oil always, install oil detection sensor in collecting oil tank 30, oil detection sensor real-time detection collects whether pure of oil in the oil tank 30 to whether open according to the oil drain port of oil signal control collection oil tank 30 and arrange the oil.
As shown in fig. 3, when the oil in the collection oil tank 30 is pure, the circulation oil path of the normal temperature oil tank 10 and the oil discharge port of the collection oil tank 30 are opened, and the circulation oil path of the low temperature oil tank 20 and the oil return path of the collection oil tank 30 are closed.
It can be understood that, when the oil detection sensor in the collection oil tank 30 detects that the oil is pure, the controller receives a feedback signal from the oil detection sensor, and automatically opens the first control valve 14, the fourth control valve 15, and the sixth control valve 34, so as to open the circulation oil path of the normal temperature oil tank 10 and the oil discharge port of the collection oil tank 30, and simultaneously closes the second control valve 24, the third control valve 33, and the fifth control valve 25, so as to close the circulation oil path of the low temperature oil tank 20 and the oil return path of the collection oil tank 30; at this time, the fourth control valve 15 is opened, so that the normal temperature hydraulic oil can flow in a circulation manner in the hydraulic circuit formed by the normal temperature oil tank 10, the hydraulic oil pump 40, the hydraulic oil pipe, and the hydraulic oil cylinder, and meanwhile, the low temperature and normal temperature mixed hydraulic oil is not input into the collecting oil tank 30 any more, and the sixth control valve 34 of the third oil discharge port 32 of the collecting oil tank 30 is opened, so that the mixed hydraulic oil is discharged out of the collecting oil tank 30.
In an embodiment of the present invention, if the current hydraulic oil flow mode is not the low-temperature hydraulic oil flow circulation mode, the step of replacing the oil supply mode with the low-temperature hydraulic oil supply mode includes:
step S341: opening an oil supply path of the low-temperature oil tank 20 and an oil return path of the collecting oil tank 30, and closing a circulating oil path of the normal-temperature oil tank 10, an oil return path of the low-temperature oil tank 20 and an oil discharge port of the collecting oil tank 30;
step S342: and acquiring an oil product signal in the collecting oil tank 30 in real time, and controlling the working state of the collecting oil tank 30 according to the oil product signal.
It can be understood that the controller receives the feedback signal of the ambient temperature sensor, and gives a prompt to replace the hydraulic oil tank, and after the permission of the operator is obtained, the controller automatically opens the second control valve 24 and the third control valve 33 to open the oil supply path of the low-temperature oil tank 20 and the oil return path of the collection oil tank 30, and closes the first control valve 14, the fourth control valve 15, the fifth control valve 25 and the sixth control valve 34 to open the oil circulation path of the normal-temperature oil tank 10, the oil return path of the low-temperature oil tank 20 and the oil discharge port of the collection oil tank 30; then, the low-temperature oil tank 20 starts to supply hydraulic oil to the hydraulic pipelines and the like, and the original normal-temperature hydraulic oil in the hydraulic oil pump 40, the hydraulic oil pipes and the hydraulic oil cylinders is discharged into the collecting oil tank 30 along with the pipelines. Collect oil tank 30 and collect original normal atmospheric temperature hydraulic oil always, install oil detection sensor in collecting oil tank 30, oil detection sensor real-time detection collects whether pure of oil in the oil tank 30 to whether open according to the oil drain port of oil signal control collection oil tank 30 and arrange the oil.
As shown in fig. 3, when the oil is pure, the oil circulation path of the low temperature oil tank 20 and the oil discharge port of the collection oil tank 30 are opened, and the oil circulation path of the normal temperature oil tank 10 and the oil return port of the collection oil tank 30 are closed.
That is, when the oil detection sensor in the oil collection tank 30 detects that the oil is pure, the controller receives a feedback signal from the oil detection sensor, and automatically opens the second control valve 24, the fifth control valve 25, and the sixth control valve 34 to open the oil circulation path of the low temperature oil tank 20 and the oil discharge port of the oil collection tank 30, and simultaneously closes the first control valve 14, the third control valve 33, and the fourth control valve 15 to close the oil circulation path of the normal temperature oil tank 10 and the oil return port of the oil collection tank 30; at this time, the fifth control valve 25 is opened to circulate the hydraulic oil in the hydraulic circuit formed by the low-temperature oil tank 20, the hydraulic oil pump 40, the hydraulic oil pipe, and the hydraulic cylinder, and the mixed hydraulic oil is not inputted to the collection oil tank 30 any more, and the sixth control valve 34 at the third oil discharge port 32 of the collection oil tank 30 is opened to discharge the mixed hydraulic oil to the outside of the oil tank.
In addition, each oil supply tank is provided with an oil discharge port for discharging hydraulic oil, specifically, the normal temperature oil tank 10 is provided with a first oil discharge port 13, the low temperature oil tank 20 is provided with a second oil discharge port 23, the first oil discharge port 13 is provided with a seventh control valve 16 for controlling the first oil discharge port 13 to be opened or closed, and the second oil discharge port 23 is provided with an eighth control valve 26 for controlling the second oil discharge port 23 to be opened or closed. When the service life of the hydraulic oil in the oil supply oil tank is reached, the control valve corresponding to the control oil discharge port is opened, so that the oil discharge port of the oil supply oil tank is opened and oil is discharged.
When the service life of the hydraulic oil in the oil supply oil tank is up, and the hydraulic oil needs to be replaced, the control valve can be opened through one key of the controller, and the hydraulic oil is discharged out of the oil supply oil tank; need not the manual work and look for the hydraulic oil discharge port and manually open the ball valve to the bottom of fire engine, convenient and fast.
In the embodiment of the invention, the invention also provides a fire fighting truck, and the hydraulic oil in the hydraulic system of the fire fighting truck is replaced by the hydraulic oil replacing method. A fire engine is equipped with 3 hydraulic tank, including normal atmospheric temperature oil tank 10, low temperature oil tank 20 and collection oil tank 30, through the mating reaction of three hydraulic tank for remaining old hydraulic oil in discharge line and the executive component 50 when changing hydraulic oil prevents that old hydraulic oil from polluting new hydraulic oil after mixing with new hydraulic oil, has further improved fire engine's hydraulic system's life.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (14)
1. The hydraulic oil replacement system is characterized by comprising:
the hydraulic system comprises at least two oil supply tanks, a hydraulic oil tank and a control system, wherein the at least two oil supply tanks supply oil for the hydraulic system and respectively contain hydraulic oil with different working temperatures; and
a controller configured to:
and acquiring the current environment temperature, selecting to select the oil supply tank matched with the current environment temperature for supplying oil, and simultaneously discharging mixed hydraulic oil in the hydraulic system in the oil supply switching process.
2. The hydraulic oil replacement system according to claim 1, further comprising a collection tank (30), wherein an oil return port of the collection tank (30) is connected to the actuator (50) and is configured to collect and discharge mixed hydraulic oil during oil supply switching.
3. The hydraulic oil replacement system according to claim 2, wherein each of the oil supply tanks is provided with an oil suction port, each of the oil supply tanks and the collection tank (30) is provided with an oil return port and an oil discharge port, and each of the oil return ports is provided with a control valve for controlling the opening and closing of the corresponding oil port.
4. Hydraulic oil replacement system according to claim 3, characterized in that the oil return ports of each of the supply oil tank and the collection oil tank (30) are communicated with a main oil return path (L1) of the hydraulic system through a pipe, and the oil suction port of each of the supply oil tank is connected with a hydraulic oil pump (40).
5. The hydraulic oil replacement system according to claim 3, wherein the control valve is a check valve.
6. A hydraulic oil replacement method that is applied to the hydraulic oil replacement system according to any one of claims 1 to 5, the hydraulic oil replacement method comprising:
acquiring the oil path conduction state of each oil tank, and judging the current hydraulic oil flowing mode of the hydraulic system according to the oil path conduction state of each oil tank;
acquiring the current environment temperature, and comparing the current environment temperature with a preset replacement temperature;
and switching the hydraulic oil flow mode of the hydraulic system into a hydraulic oil flow mode matched with the current environment temperature according to the comparison result.
7. The hydraulic oil replacement method according to claim 6, wherein the number of the oil supply tanks is two and is respectively a normal-temperature oil tank (10) containing normal-temperature hydraulic oil and a low-temperature oil tank (20) containing low-temperature hydraulic oil; the step of obtaining the oil path conduction state of each oil tank and judging the current hydraulic oil flow mode of the hydraulic system according to the oil path conduction state of each oil tank comprises the following steps:
when the circulating oil way of the normal-temperature oil tank (10) is conducted and the circulating oil way of the low-temperature oil tank (20) and the oil return oil way of the collecting oil tank (30) are disconnected, the current hydraulic oil flowing mode of the hydraulic system is a normal-temperature hydraulic oil flowing circulating mode;
and when the circulating oil way of the low-temperature oil tank (20) is conducted and the circulating oil way of the normal-temperature oil tank (10) and the oil return oil way of the collecting oil tank (30) are disconnected, the current hydraulic oil flowing mode of the hydraulic system is a low-temperature hydraulic oil flowing circulating mode.
8. The hydraulic oil replacing method according to claim 6, wherein the step of switching the hydraulic oil flow mode of the hydraulic system to the hydraulic oil flow mode matched with the current ambient temperature according to the comparison result comprises:
when the current environment temperature is higher than the preset replacement temperature, judging whether the current hydraulic oil flowing mode of the hydraulic system is a normal-temperature hydraulic oil flowing circulation mode or not;
if the current hydraulic oil flowing mode is not the normal-temperature hydraulic oil flowing circulation mode, the oil supply mode is changed into the normal-temperature hydraulic oil supply mode;
when the current environment temperature is lower than a preset replacement temperature, judging whether the current hydraulic oil flow mode of the hydraulic system is a low-temperature hydraulic oil flow circulation mode;
and if the current hydraulic oil flowing mode is not the low-temperature hydraulic oil flowing circulation mode, replacing the oil supply mode with the low-temperature hydraulic oil supply mode.
9. The hydraulic oil replacement method according to claim 8, wherein if the current hydraulic oil flow mode is not the normal-temperature hydraulic oil flow circulation mode, the step of replacing the oil supply mode with the normal-temperature hydraulic oil supply mode includes:
opening an oil supply oil path of the normal-temperature oil tank (10) and an oil return oil path of the collecting oil tank (30), and closing a circulating oil path of the low-temperature oil tank (20), the normal-temperature oil tank (10) and an oil discharge port of the collecting oil tank (30);
and acquiring the oil product signal in the collecting oil tank (30) in real time, and controlling the working state of the collecting oil tank (30) according to the oil product signal.
10. The hydraulic oil replacement method according to claim 9, wherein the step of acquiring the oil signal in the collection oil tank (30) in real time and controlling the working state of the collection oil tank (30) according to the oil signal comprises:
when the oil in the collection oil tank (30) is pure, the circulating oil way of the normal-temperature oil tank (10) and the oil discharge port of the collection oil tank (30) are opened, and the circulating oil way of the low-temperature oil tank (20) and the oil return oil way of the collection oil tank (30) are closed.
11. The hydraulic oil replacement method according to claim 8, wherein the step of replacing the oil supply mode with the low-temperature hydraulic oil supply mode if the current hydraulic oil flow mode is not the low-temperature hydraulic oil flow circulation mode comprises:
opening an oil supply oil path of the low-temperature oil tank (20) and an oil return oil path of the collecting oil tank (30), and closing a circulating oil path of the normal-temperature oil tank (10), the oil return oil path of the low-temperature oil tank (20) and an oil discharge port of the collecting oil tank (30);
and acquiring an oil product signal in the collecting oil tank (30) in real time, and controlling the working state of the collecting oil tank (30) according to the oil product signal.
12. The hydraulic oil replacement method according to claim 11, wherein the step of acquiring the oil signal in the collection oil tank (30) in real time and controlling the working state of the collection oil tank (30) according to the oil signal comprises:
when the oil product is pure, the circulating oil path of the low-temperature oil tank (20) and the oil discharge port of the collecting oil tank (30) are opened, and the circulating oil path of the normal-temperature oil tank (10) and the oil return port of the collecting oil tank (30) are closed.
13. The hydraulic oil replacement method according to any one of claims 6 to 12, further comprising:
and when the service life of the hydraulic oil in the oil supply oil tank is reached, opening an oil discharge port of the oil supply oil tank for oil discharge.
14. A fire fighting truck characterized in that the hydraulic oil in the hydraulic system of the fire fighting truck is replaced by the hydraulic oil replacement method according to any one of claims 6 to 13.
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| CN202111642160.2A CN114412880B (en) | 2021-12-29 | 2021-12-29 | Hydraulic oil replacement method and fire truck |
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| CN202111642160.2A CN114412880B (en) | 2021-12-29 | 2021-12-29 | Hydraulic oil replacement method and fire truck |
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| JPH08281760A (en) * | 1995-04-14 | 1996-10-29 | Japan Steel Works Ltd:The | Method for controlling temperature of operation oil of oil pressure circuit of injection molding machine |
| JP2005289431A (en) * | 2004-03-31 | 2005-10-20 | Mk Seiko Co Ltd | Oil exchange apparatus |
| CN109113902A (en) * | 2018-08-13 | 2019-01-01 | 湖北赛恩斯科技股份有限公司 | A kind of different labels oil tank fuel switching device and method |
| CN111256770A (en) * | 2020-01-22 | 2020-06-09 | 哈尔滨东安实业发展有限公司 | Multi-oil product displacement lubricating oil flow and pressurizing tester |
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2021
- 2021-12-29 CN CN202111642160.2A patent/CN114412880B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08281760A (en) * | 1995-04-14 | 1996-10-29 | Japan Steel Works Ltd:The | Method for controlling temperature of operation oil of oil pressure circuit of injection molding machine |
| JP2005289431A (en) * | 2004-03-31 | 2005-10-20 | Mk Seiko Co Ltd | Oil exchange apparatus |
| CN109113902A (en) * | 2018-08-13 | 2019-01-01 | 湖北赛恩斯科技股份有限公司 | A kind of different labels oil tank fuel switching device and method |
| CN111256770A (en) * | 2020-01-22 | 2020-06-09 | 哈尔滨东安实业发展有限公司 | Multi-oil product displacement lubricating oil flow and pressurizing tester |
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| CN114412880B (en) | 2024-02-27 |
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