CN213808256U - Fire engine hydraulic system and fire engine - Google Patents
Fire engine hydraulic system and fire engine Download PDFInfo
- Publication number
- CN213808256U CN213808256U CN202022356039.0U CN202022356039U CN213808256U CN 213808256 U CN213808256 U CN 213808256U CN 202022356039 U CN202022356039 U CN 202022356039U CN 213808256 U CN213808256 U CN 213808256U
- Authority
- CN
- China
- Prior art keywords
- oil
- oil pump
- hydraulic system
- communication line
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The utility model provides a fire engine hydraulic system and fire engine, fire engine hydraulic system includes: an oil supply line; a main oil pump; the execution system is used for sequentially arranging the main oil pumps on the oil supply pipeline along the oil supply direction of the oil supply pipeline; and the control oil pump is communicated with the main oil pump and pumps the control oil into the main oil pump. The technical scheme of the utility model, under the main oil pump is in the non-working condition, for example when the fire engine is in the operating mode of fetching water, the main oil pump is in high-speed no-load rotating state, and the control oil pump can go into the control oil to the main oil pump, makes the main oil pump be in little discharge capacity state under this state always, has reduced the no-load discharge capacity output of main oil pump like this, reduces fire engine hydraulic system's calorific capacity to ensure that fire engine hydraulic system can work steadily.
Description
Technical Field
The utility model relates to a fire engine hydraulic control technical field particularly, relates to a fire engine hydraulic system and fire engine.
Background
At present, a main oil pump of a hydraulic system of a fire fighting truck is in a high-speed no-load rotation state when the fire fighting truck is in a water pumping working condition, effective oil flow and pressure are not output, and the heat productivity of the hydraulic system of the fire fighting truck is large. In the related art, a hydraulic system of the fire truck needs to be specially provided with a heat dissipation gear pump with large discharge capacity, and the heat dissipation gear pump absorbs oil from an oil tank and then conveys the oil to an air-cooled radiator for heat dissipation. However, the heat dissipation gear pump is high in manufacturing cost, and the main oil pump adopts the heat dissipation gear pump, so that the manufacturing and maintenance cost of the hydraulic system of the fire fighting truck is increased.
SUMMERY OF THE UTILITY MODEL
The present invention aims at least solving one of the technical problems existing in the prior art or the related art.
Therefore, the utility model discloses an aim at provides a fire engine hydraulic system.
Another object of the utility model is to provide a fire engine.
In order to achieve the above object, an embodiment of the utility model provides a fire engine hydraulic system, fire engine hydraulic system includes: an oil supply line; a main oil pump; the execution system is used for sequentially arranging the main oil pumps on the oil supply pipeline along the oil supply direction of the oil supply pipeline; and the control oil pump is communicated with the main oil pump and pumps the control oil into the main oil pump.
In this technical scheme, under the main oil pump is in non-operating mode, for example when the fire engine is in the operating mode of fetching water, the main oil pump is in high-speed no-load rotation state, and the control oil pump can pump into the control oil to the main oil pump, makes the main oil pump be in little discharge capacity state under this state always, has reduced the no-load discharge capacity output of main oil pump like this, reduces fire engine hydraulic system's calorific capacity to ensure that fire engine hydraulic system can work steadily. In addition, this application is through addding the control oil pump, and the mode that utilizes the control oil pump to make the main oil pump be in the small discharge capacity state under this state has reduced fire engine hydraulic system's calorific capacity, need not like among the correlation technique, need set up the great heat dissipation gear pump of row volume with the main oil pump to add the air-cooled radiator, absorb oil from the oil tank through the heat dissipation gear pump and carry the mode of air-cooled radiator with fluid after, practiced thrift fire engine hydraulic system's manufacturing and maintenance cost like this.
Additionally, the utility model provides a fire engine hydraulic system in above-mentioned embodiment can also have following additional technical characterstic:
in the above technical scheme, the main oil pump includes external oil port, and fire engine hydraulic system still includes first intercommunication pipeline, and control oil pump and external oil port set gradually on first intercommunication pipeline along the fuel feeding direction of first intercommunication pipeline.
In this technical scheme, first communication pipeline is with main oil pump and control oil pump intercommunication, guarantees like this that the control oil in the control oil pump can input the main oil pump in to ensure that the main oil pump is in little discharge capacity state under the high-speed unloaded rotation state always, and then reduced the unloaded discharge capacity output of main oil pump, reduced fire engine hydraulic system's calorific capacity, finally ensure that fire engine hydraulic system can work steadily.
In any one of the above technical solutions, the hydraulic system of the fire engine further includes a second communication pipeline and a first overflow valve disposed on the second communication pipeline, and a liquid outlet of the second communication pipeline is connected to a part of the pipeline between the main oil pump and the control oil pump of the first communication pipeline and forms a connection point.
In this technical scheme, first overflow valve can prevent that the oil pressure of first intercommunication pipeline from surpassing the overflow pressure value of predetermineeing on the first overflow valve, has avoided first intercommunication pipeline superpressure and has leaded to the problem that first intercommunication pipeline, main oil pump and control oil pump destroy like this to ensure that the control oil pump can be reliable and stable to main oil pump input control oil, and then ensure that fire engine hydraulic system can normally dispel the heat, work steadily.
In any of the above technical solutions, the hydraulic system of the fire fighting truck further includes a third communicating pipeline and an unloading valve disposed on the third communicating pipeline, and a liquid outlet of the third communicating pipeline is connected to the second communicating pipeline and located between the connection point and the first overflow valve.
In the technical scheme, when the main oil pump is in a working state, the unloading valve can completely unload the oil pressure of the first communication pipeline, so that the control oil output from the control oil pump cannot influence the normal work of the main oil pump, and the hydraulic system of the fire truck can normally work.
In any one of the above technical solutions, the hydraulic system of the fire fighting truck further includes a pressure reducing valve, and the pressure reducing valve is disposed on the first communication pipeline and located between the control oil pump and the external oil port.
In this technical scheme, the relief pressure valve can control the oil pressure of the fluid of control oil pump to the input of main oil pump, avoids the too big problem that causes first intercommunication pipeline, control oil pump and main oil pump superpressure to destroy of oil pressure to ensure that the control oil pump can be steadily and reliably to main oil pump input control oil, and then ensure that fire engine hydraulic system can normally dispel the heat, work steadily.
In any one of the above technical solutions, the hydraulic system of the fire engine further includes a second communication pipeline and a throttle valve disposed on the second communication pipeline, and a liquid outlet of the second communication pipeline is connected to a part of the pipeline between the pressure reducing valve of the first communication pipeline and the control oil pump and forms a connection point.
In this technical scheme, the choke valve has the throttle function, can adjust the pressure of first intercommunication pipeline, has avoided first intercommunication pipeline superpressure like this and has leaded to the problem of first intercommunication pipeline, main oil pump and control oil pump destruction to ensure that the control oil pump can be steadily and reliably to main oil pump input control oil, and then ensure that fire engine hydraulic system can normally dispel the heat, work steadily.
In any of the above technical solutions, the hydraulic system of the fire fighting truck further includes a third communicating pipeline and an unloading valve disposed on the third communicating pipeline, and a liquid outlet of the third communicating pipeline is connected to the second communicating pipeline and located between the connection point and the throttle valve.
In the technical scheme, when the main oil pump is in a working state, the unloading valve can completely unload the oil pressure of the first communication pipeline, so that the control oil output from the control oil pump cannot influence the normal work of the main oil pump, and the hydraulic system of the fire truck can normally work.
In any of the above technical solutions, the execution system includes: the oil inlet of the first reversing valve is connected with the oil supply pipeline; the first reversing pipeline is connected with a first working oil port of the first reversing valve, and the second reversing pipeline is connected with a second working oil port of the first reversing valve. And the execution assembly is arranged between the first reversing pipeline and the second reversing pipeline.
In the technical scheme, the first reversing valve can control the oil inlet direction of oil, namely, the first reversing valve can be enabled to become an oil supply oil way by utilizing the reversing function of the first reversing valve, the second reversing pipeline becomes an oil return oil way, or the first reversing valve becomes the oil return oil way, and the second reversing pipeline becomes the oil supply oil way.
In any of the above technical solutions, the execution component includes: the control pipeline comprises a first control oil path and a second control oil path, the first control oil path is connected to the first reversing pipeline, and the second control oil path is connected to the second reversing pipeline; the oil cylinder is provided with a first oil port and a second oil port, the first oil port is connected with a first execution oil port of the second reversing valve, the second oil port is connected with a second execution oil port of the second reversing valve, an oil inlet of the second reversing valve is connected with the first control oil way, and an oil return port of the second reversing valve is connected with the second control oil way.
In the technical scheme, the second reversing valve can switch the direction of control oil entering the oil cylinder, so that the piston of the oil cylinder can extend out or retract, the oil cylinder can work in two directions, the requirement of the oil cylinder of the hydraulic system of the fire fighting truck on two-way control is met, and the hydraulic system of the fire fighting truck can work normally.
The utility model discloses technical scheme of second aspect provides a fire engine, and the fire engine includes: a leg and/or arm support; according to the fire fighting truck hydraulic system in any one of the technical solutions of the first aspect, the actuating system of the fire fighting truck hydraulic system comprises a support leg cylinder and/or a boom cylinder, and the support leg cylinder and/or the boom cylinder are/is used for driving the support leg and/or the boom to extend or retract.
The utility model discloses the fire engine that technical scheme of second aspect provided, because of the fire engine hydraulic system who includes any one in the first aspect technical scheme, therefore have all beneficial effects that any one of the above-mentioned technical scheme had, no longer describe herein.
In the scheme, the hydraulic system of the fire truck can drive the supporting leg oil cylinder and/or the arm support oil cylinder to act so as to meet the action requirements of the vehicle, such as the rotation requirement of the vehicle arm support and the telescopic requirement of the supporting leg, so that the vehicle has an automatic control function, and the automatic control requirement of the vehicle is met.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic structural diagram of a hydraulic system of a fire fighting truck according to a first embodiment of the present invention;
fig. 2 shows a schematic structural diagram of a hydraulic system of a fire fighting truck according to a second embodiment of the present invention;
fig. 3 shows a schematic structural diagram of a hydraulic system of a fire fighting truck according to a third embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:
10. an oil supply line; 20. a main oil pump; 22. an external oil port; 30. an execution system; 32. a first direction changing valve; 322. an oil inlet; 324. a first working oil port; 326. a second working oil port; 34. a first reversing pipeline; 36. a second reversing pipeline; 38. an execution component; 382. a control pipeline; 3822. a first control oil passage; 3824. a second control oil passage; 384. an oil cylinder; 386. a second directional control valve; 3862. an oil inlet; 3864. an oil return port; 40. controlling an oil pump; 50. a first communicating pipe; 52. a connection point; 60. a second communication line; 62. a first overflow valve; 64. a throttle valve; 70. a third communication line; 72. an unloading valve; 80. a pressure reducing valve; 90. a second relief valve.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
It should be noted that the hydraulic system of the fire fighting truck in the present application is used for controlling the actions of the equipment on the fire fighting truck, such as the rotation of the boom on the fire fighting truck, the retraction of the vehicle legs, and the rotation of the winch.
A fire engine hydraulic system according to some embodiments of the present invention is described below with reference to fig. 1-3. The fire fighting truck hydraulic system comprises an oil supply line 10, a main oil pump 20, an execution system 30 and a control oil pump. Wherein, the main oil pump 20 and the execution system 30 are sequentially arranged on the oil supply pipeline 10 along the oil supply direction of the oil supply pipeline 10; and a control oil pump 40 communicating with the main oil pump 20, the control oil pump 40 being capable of pumping control oil into the main oil pump 20.
In the above arrangement, when the main oil pump 20 is in a non-working condition, for example, when the fire fighting truck is in a water pumping condition, the main oil pump 20 is in a high-speed no-load rotation state, and the control oil pump 40 can pump the control oil into the main oil pump 20, so that the main oil pump 20 is always in a small displacement state in this state, thereby reducing the no-load displacement output of the main oil pump 20, reducing the heat productivity of the fire fighting truck hydraulic system, and ensuring that the fire fighting truck hydraulic system can stably work. In addition, this application is through addding control oil pump 40, utilizes control oil pump 40 to make main oil pump 20 be in the mode of little discharge capacity state under this state always, has reduced fire engine hydraulic system's calorific capacity, need not like in the correlation technique, need set up main oil pump 20 into the great heat dissipation gear pump of discharge capacity to add the air-cooled radiator, carry the mode of air-cooled radiator with fluid after inhaling oil from the oil tank through the heat dissipation gear pump and dispel the heat, practiced thrift fire engine hydraulic system's manufacturing and maintenance cost like this.
It should be noted that, when the fire fighting truck is in the water pumping condition, the water pump is in the working state, and the main oil pump 20 is in the non-working state, because the main oil pump 20 and the water pump both obtain the driving force from the engine of the fire fighting truck, even if the main oil pump 20 is in the non-working state, the main oil pump 20 still rotates with the engine at a high speed in the idle state.
Example one
Specifically, as shown in fig. 1, in the first embodiment of the present invention, the main oil pump 20 has the external oil port 22, the fire fighting truck hydraulic system further includes the first communicating pipeline 50, and the control oil pump 40 and the external oil port 22 are sequentially disposed on the first communicating pipeline 50 along the oil supplying direction of the first communicating pipeline 50.
In the above arrangement, the first communication pipeline 50 communicates the main oil pump 20 with the control oil pump 40, so that the control oil in the control oil pump 40 can be input into the main oil pump 20, and thus the main oil pump 20 is ensured to be always in a small displacement state in a high-speed no-load rotation state, and further the no-load displacement output of the main oil pump 20 is reduced, the heat productivity of the fire fighting truck hydraulic system is reduced, and finally the fire fighting truck hydraulic system can be ensured to stably work.
Specifically, as shown in fig. 1, in the first embodiment of the present invention, the main oil pump 20 is an electric proportional control oil pump. This allows the displacement of the main oil pump 20 to be controlled to meet the control requirements of the fire fighting vehicle hydraulic system.
Specifically, as shown in fig. 1, in the first embodiment of the present invention, the fire fighting truck hydraulic system further includes a second communication pipeline 60 and a first overflow valve 62 disposed on the second communication pipeline 60, and a liquid outlet of the second communication pipeline 60 is connected to a part of pipelines between the main oil pump 20 and the control oil pump 40 of the first communication pipeline 50 and forms a connection point.
In the above arrangement, the first overflow valve 62 can prevent the oil pressure of the first communication pipeline 50 from exceeding the preset overflow pressure value of the first overflow valve 62, so that the problem that the first communication pipeline 50, the main oil pump 20 and the control oil pump 40 are damaged due to overpressure of the first communication pipeline 50 is avoided, and therefore the control oil pump 40 can stably and reliably input control oil to the main oil pump 20, and further the fire fighting truck hydraulic system can normally dissipate heat and stably work.
Specifically, as shown in fig. 1, in the first embodiment of the present invention, the fire fighting truck hydraulic system further includes a third communication pipeline 70 and an unloading valve 72 disposed on the third communication pipeline 70, and a liquid outlet of the third communication pipeline 70 is connected to the second communication pipeline 60 and is located between the connection point 52 and the first overflow valve 62.
In the above arrangement, the unloading valve 72 can completely unload the oil pressure of the first communication line 50 when the main oil pump 20 is in the operating state, which ensures that the control oil output from the control oil pump 40 does not affect the normal operation of the main oil pump 20, thereby ensuring that the fire fighting vehicle hydraulic system can operate normally.
Specifically, as shown in fig. 1, in the first embodiment of the present invention, the unloading valve 72 is an electromagnetic unloading valve, which facilitates the remote control of the working personnel, improves the control efficiency of the unloading valve 72, and reduces the work load of the working personnel.
Specifically, as shown in fig. 1, in the first embodiment of the present invention, the actuating system 30 includes a first direction valve 32, a first direction pipe 34, a second direction pipe 36, and an actuating assembly 38. Specifically, the oil inlet 322 of the first direction valve 32 is connected to the oil supply line 10, the first direction line 34 is connected to the first working oil port 324 of the first direction valve 32, the second direction line 36 is connected to the second working oil port 326 of the first direction valve 32, and the actuator assembly 38 is disposed between the first direction line 34 and the second direction line 36.
In the above arrangement, the first direction valve 32 can control the oil inlet direction of the oil, that is, the direction change function of the first direction valve 32 can be utilized to enable the first direction valve 32 to become an oil supply path and the second direction pipeline 36 to become an oil return path, or the first direction valve 32 becomes an oil return path and the second direction pipeline 36 becomes an oil supply path, so that the oil supply path can be switched by operating the first direction valve 32, thereby meeting the working requirement of the execution assembly 38 and further ensuring that the execution assembly 38 can normally work.
It should be noted that, a pressure relief structure is disposed on a part of the pipeline between the first direction valve 32 of the oil supply pipeline 10 and the main oil pump 20, and is used for discharging oil discharged by the main oil pump 20 in a high-speed no-load rotation state.
Specifically, as shown in fig. 1, in the first embodiment of the present invention, four sets of actuating assemblies 38 are connected in parallel between the first direction-changing pipeline 34 and the second direction-changing pipeline 36.
In the above arrangement, the multiple groups of executing assemblies 38 can realize multiple functions, so that the control capability of the hydraulic system of the fire fighting truck is enhanced, and the multifunctional control requirement of the hydraulic system of the fire fighting truck is met. Of course, other numbers of sets of execution components 38 may be provided, as appropriate.
Specifically, as shown in fig. 1, in the first embodiment of the present invention, a second overflow valve 90 is further disposed between the first direction-changing pipeline 34 and the second direction-changing pipeline 36.
In the above arrangement, the second relief valve 90 can avoid the problem that the first and second direction changing lines 34 and 36 or other hydraulic components connected to the first and second direction changing lines 34 and 36 are damaged due to overpressure of oil pressure in the first and second direction changing lines 34 and 36, thereby ensuring stable and reliable operation of the actuator assembly 38.
Specifically, as shown in fig. 1, in the first embodiment of the present invention, the actuating assembly 38 includes a control line 382, a cylinder 384 and a second directional valve 386. The control line 382 includes a first control oil path 3822 and a second control oil path 3824, the first control oil path 3822 is connected to the first direction changing line 34, and the second control oil path 3824 is connected to the second direction changing line 36. The oil cylinder 384 is provided with a first oil port and a second oil port, the first oil port is connected with a first execution oil port of the second reversing valve 386, the second oil port is connected with a second execution oil port of the second reversing valve 386, an oil inlet 3862 of the second reversing valve 386 is connected with the first control oil path 3822, and an oil return port 3864 of the second reversing valve 386 is connected with the second control oil path 3824.
In the above arrangement, the second direction change valve 386 can switch the direction of the control oil entering the cylinder 384, so that the piston of the cylinder 384 can extend or retract, i.e., the cylinder 384 can work bidirectionally, thereby satisfying the bidirectional control requirement of the cylinder 384 of the fire fighting truck hydraulic system, and further ensuring the fire fighting truck hydraulic system to work normally.
Example two
The second embodiment has the following differences from the first embodiment:
specifically, as shown in fig. 2, in the second embodiment of the present invention, the fire fighting truck hydraulic system further includes a pressure reducing valve 80, the pressure reducing valve 80 is disposed on the first communicating pipeline 50 and located between the control oil pump 40 and the external oil port 22.
In the above arrangement, the pressure reducing valve 80 can control the oil pressure of the oil input from the control oil pump 40 to the main oil pump 20, and avoid the problem of overpressure damage to the first communication pipeline 50, the control oil pump 40 and the main oil pump 20 due to excessive oil pressure, so as to ensure that the control oil pump 40 can stably and reliably input the control oil to the main oil pump 20, and further ensure that the fire fighting truck hydraulic system can normally dissipate heat and stably work.
Specifically, as shown in fig. 2, in the second embodiment of the present invention, the fire fighting truck hydraulic system further includes a second communication pipeline 60 and a throttle valve 64 disposed on the second communication pipeline 60, and a liquid outlet of the second communication pipeline 60 is connected to the first communication pipeline 50 between the main oil pump 20 and the control oil pump 40 and forms a connection point 52.
In the above arrangement, the throttle valve 64 has a throttling function, and can adjust the pressure of the first communication pipeline 50, so as to avoid the problem that the first communication pipeline 50, the main oil pump 20 and the control oil pump 40 are damaged due to overpressure of the first communication pipeline 50, thereby ensuring that the control oil pump 40 can stably and reliably input control oil to the main oil pump 20, and further ensuring that the fire fighting truck hydraulic system can normally dissipate heat and stably work.
The other structures of the second embodiment are the same as those of the first embodiment, and are not described herein again.
EXAMPLE III
The third embodiment has the following differences from the second embodiment:
specifically, as shown in fig. 3, in the third embodiment of the present invention, the hydraulic system of the fire fighting truck further includes a third communicating pipeline 70 and an unloading valve 72 disposed on the third communicating pipeline 70, and a liquid outlet of the third communicating pipeline 70 is connected to the second communicating pipeline 60 and is located between the connection point 52 and the throttle valve 64.
In the above arrangement, the unloading valve 72 can completely unload the oil pressure of the first communication line 50 when the main oil pump 20 is in the operating state, which ensures that the control oil output from the control oil pump 40 does not affect the normal operation of the main oil pump 20, thereby ensuring that the fire fighting vehicle hydraulic system can operate normally.
The utility model discloses a fire engine is provided to the embodiment of the utility model, fire engine include as arbitrary fire engine hydraulic system, landing leg and/or cantilever crane in the embodiment of the first aspect. The actuating system 30 of the hydraulic system of the fire fighting truck comprises a support leg cylinder and/or a boom cylinder, and is used for driving the support leg and/or the boom to extend or retract.
In the above arrangement, the hydraulic system of the fire truck can drive the support oil cylinder and/or the boom oil cylinder to act so as to meet the action requirements of the vehicle, such as the rotation requirement of the vehicle boom and the telescopic requirement of the support, so that the vehicle has an automatic control function, and the automatic control requirement of the vehicle is met.
The utility model discloses the fire engine that technical scheme of second aspect provided, because of the fire engine hydraulic system who includes any one in the first aspect embodiment, therefore have all beneficial effects that any above-mentioned embodiment had, no longer describe herein.
It should be noted that, in the present application, the control oil pump 40 is provided to supply the control oil, so that the output flow of the main oil pump 20 in the operating condition is reduced to the minimum displacement, and the heat generation is fundamentally reduced. The control oil pump 40 has small specification discharge capacity and small self-heating, and is provided with the electromagnetic unloading valve, so that the output flow of the control oil pump 40 can be completely unloaded under the non-pumping working condition, and the normal work of the main oil pump 20 is not influenced.
From the above description, it can be seen that, when the main oil pump 20 is in a non-operating condition, for example, when the fire fighting truck is in a water pumping condition, the main oil pump 20 is in a high-speed no-load rotation state, and the control oil pump 40 can pump the control oil into the main oil pump 20, so that the main oil pump 20 is always in a small displacement state in this state, which reduces the no-load displacement output of the main oil pump 20, reduces the heat productivity of the fire fighting truck hydraulic system, and ensures that the fire fighting truck hydraulic system can stably operate. In addition, this application has reduced fire engine hydraulic system's calorific capacity through addding control oil pump 40, utilizes control oil pump 40 to make main oil pump 20 be in the mode of the little discharge capacity state under this state always, need not like in the correlation technique, need set up the great heat dissipation gear pump of row volume with main oil pump 20 to add the air-cooled radiator, carry the mode of air-cooled radiator with fluid after inhaling oil from the oil tank through the heat dissipation gear pump and dispel the heat, practiced thrift fire engine hydraulic system's manufacturing and maintenance cost like this.
In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 do not necessarily 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.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A fire engine hydraulic system, comprising:
an oil supply line (10);
a main oil pump (20);
the main oil pump (20) and the execution system (30) are sequentially arranged on the oil supply pipeline (10) along the oil supply direction of the oil supply pipeline (10);
and the control oil pump (40) is communicated with the main oil pump (20), and the control oil pump (40) pumps control oil into the main oil pump (20).
2. A fire fighting truck hydraulic system according to claim 1, wherein the main oil pump (20) includes an external oil port (22), the fire fighting truck hydraulic system further includes a first communication line (50), and the control oil pump (40) and the external oil port (22) are sequentially provided on the first communication line (50) along an oil supply direction of the first communication line (50).
3. A fire fighting vehicle hydraulic system as defined in claim 2, further comprising a second communication line (60) and a first relief valve (62) provided on the second communication line (60), a liquid outlet of the second communication line (60) being connected to a portion of the first communication line (50) between the main oil pump (20) and the control oil pump (40) and forming a connection point (52).
4. A fire fighting vehicle hydraulic system as defined in claim 3, further comprising a third communication line (70) and an unloading valve (72) provided on the third communication line (70), a liquid outlet of the third communication line (70) being connected to the second communication line (60) and being located between the connection point (52) and the first spill valve (62).
5. A fire fighting vehicle hydraulic system as defined in claim 2, further comprising a pressure reducing valve (80), the pressure reducing valve (80) being disposed on the first communication line (50) and between the control oil pump (40) and the external oil port (22).
6. A fire fighting vehicle hydraulic system as claimed in claim 5, characterized in that the fire fighting vehicle hydraulic system further comprises a second communication line (60) and a throttle valve (64) provided on the second communication line (60), the outlet of the second communication line (60) being connected to a portion of the line between the pressure reducing valve (80) of the first communication line (50) and the control oil pump (40) and forming a connection point (52).
7. A fire fighting vehicle hydraulic system as defined in claim 6, further comprising a third communication line (70) and an unloading valve (72) provided on the third communication line (70), an outlet port of the third communication line (70) being connected to the second communication line (60) and being located between the connection point (52) and the throttle valve (64).
8. A fire fighting vehicle hydraulic system as defined in any of claims 1 to 7, characterized in that the implement system (30) comprises:
a first direction valve (32), wherein an oil inlet (322) of the first direction valve (32) is connected with the oil supply pipeline (10);
the hydraulic control system comprises a first reversing pipeline (34) and a second reversing pipeline (36), wherein the first reversing pipeline (34) is connected with a first working oil port (324) of the first reversing valve (32), and the second reversing pipeline (36) is connected with a second working oil port (326) of the first reversing valve (32);
an actuator assembly (38) disposed between the first and second diverting conduits (34, 36).
9. A fire engine hydraulic system as set forth in claim 8, wherein the implement assembly (38) comprises:
a control line (382) including a first control oil passage (3822) and a second control oil passage (3824), the first control oil passage (3822) being connected to the first direction changing line (34), the second control oil passage (3824) being connected to the second direction changing line (36);
the oil cylinder (384) is provided with a first oil port and a second oil port, the first oil port is connected with a first execution oil port of the second reversing valve (386), the second oil port is connected with a second execution oil port of the second reversing valve (386), an oil inlet (3862) of the second reversing valve (386) is connected with the first control oil way (3822), and an oil return port (3864) of the second reversing valve (386) is connected with the second control oil way (3824).
10. A fire fighting vehicle, characterized in that the fire fighting vehicle comprises:
a leg and/or arm support;
the fire fighting truck hydraulic system of any one of claims 1 to 9, an implement system (30) of the fire fighting truck hydraulic system comprising a leg cylinder and/or a boom cylinder for driving the leg and/or the boom to extend or retract.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022356039.0U CN213808256U (en) | 2020-10-21 | 2020-10-21 | Fire engine hydraulic system and fire engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022356039.0U CN213808256U (en) | 2020-10-21 | 2020-10-21 | Fire engine hydraulic system and fire engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213808256U true CN213808256U (en) | 2021-07-27 |
Family
ID=76960528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022356039.0U Active CN213808256U (en) | 2020-10-21 | 2020-10-21 | Fire engine hydraulic system and fire engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213808256U (en) |
-
2020
- 2020-10-21 CN CN202022356039.0U patent/CN213808256U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201851432U (en) | Hydraulic system | |
| US20170159678A1 (en) | System having combinable transmission and implement circuits | |
| CN201647855U (en) | Crane and hydraulic control system for single-cylinder bolt type telescopic mechanism thereof | |
| CN103321811B (en) | Engineering machinery and engine starting ignition system thereof | |
| CN113669312A (en) | Closed hydraulic control system and engineering machinery | |
| CN102167261B (en) | Crane and hydraulic control system of single-cylinder bolt type telescopic mechanism of crane | |
| CN103303801A (en) | Hydraulic confluence control system for truck crane | |
| CN211423044U (en) | Closed loop system of differential cylinder | |
| CN103899588A (en) | Lorry-mounted crane multi-way reversing device and straight arm lorry-mounted crane | |
| CN213808256U (en) | Fire engine hydraulic system and fire engine | |
| CN205035044U (en) | Energy -saving fork truck hydraulic system in double pump confluence | |
| CN108179781A (en) | Loader hydraulic control system | |
| CN200961671Y (en) | Hydraulic transmission, work device of loader | |
| CN202946463U (en) | Hydraulic system and crawler crane | |
| CN110307199B (en) | Hydraulic control system | |
| CN200971517Y (en) | Hydraulic device of full hydraulic loader | |
| CN217708618U (en) | Hydraulic power system and working machine | |
| CN203717509U (en) | Lorry-mounted crane multi-way reversing device and straight-arm lorry-mounted crane | |
| CN207905007U (en) | Loader hydraulic control system | |
| CN216199342U (en) | Closed hydraulic control system and engineering machinery | |
| CN113357210B (en) | Cylinder arm pin hydraulic control system with flow compensation function and working machine | |
| CN1908467A (en) | Hydraulic drive and working device for loader | |
| CN113928981A (en) | Engineering vehicle and hydraulic driving system thereof | |
| CN108483264B (en) | The hydraulic control system and hoisting machinery of hoisting machinery | |
| CN110578726B (en) | Quantitative system variable hydraulic system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |