CN111878476A - Support leg hydraulic control system and work vehicle - Google Patents
Support leg hydraulic control system and work vehicle Download PDFInfo
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- CN111878476A CN111878476A CN202010750396.7A CN202010750396A CN111878476A CN 111878476 A CN111878476 A CN 111878476A CN 202010750396 A CN202010750396 A CN 202010750396A CN 111878476 A CN111878476 A CN 111878476A
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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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C27/00—Fire-fighting land vehicles
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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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
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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
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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
- F15B21/08—Servomotor systems incorporating electrically operated control means
Abstract
The invention provides a support leg hydraulic control system and a working vehicle. Wherein, landing leg hydraulic control system includes: the oil inlet valve port of the first reversing valve is used for connecting an oil source; the two oil inlet valve ports of the second reversing valve are respectively connected with the two execution valve ports of the first reversing valve; two oil ports of the first hydraulic actuating element are respectively connected with a first group of actuating valve ports of the second reversing valve; two oil ports of the second hydraulic actuating element are respectively connected with a second group of actuating valve ports of the second reversing valve; and the controller is connected with the first reversing valve and the second reversing valve and is used for controlling the first reversing valve and the second reversing valve to switch. Compared with a supporting leg hydraulic control system in the related art, the two hydraulic execution elements are respectively connected in an oil way, cannot act simultaneously, reduce misoperation risks, optimize pipeline connection, facilitate later-stage operation and maintenance, and are simpler to troubleshoot.
Description
Technical Field
The invention belongs to the field of vehicles, and particularly relates to a support leg hydraulic control system and an operation vehicle.
Background
As shown in fig. 1, the leg hydraulic control system in the related art includes four direction valves 100 'and four leg cylinders 300', oil inlets of the four direction valves 100 'are respectively connected to an oil source 200', and oil outlets of the four direction valves 100 'are respectively connected to oil inlets of the four leg cylinders 300'. In the support leg hydraulic control system, hydraulic oil output by an oil source 200 'enters four support leg oil cylinders 300' through four reversing valves 100 ', and the four support leg oil cylinders 300' are all connected in an oil way, so that the malfunction risk is large.
Disclosure of Invention
The present invention is directed to solving one of the technical problems of the prior art or the related art.
To this end, a first aspect of the invention proposes a leg hydraulic control system.
A second aspect of the invention proposes a work vehicle.
In view of this, according to a first aspect of the present invention, there is provided a leg hydraulic control system including: the oil inlet valve port of the first reversing valve is used for connecting an oil source; the two oil inlet valve ports of the second reversing valve are respectively connected with the two execution valve ports of the first reversing valve; two oil ports of the first hydraulic actuating element are respectively connected with a first group of actuating valve ports of the second reversing valve; two oil ports of the second hydraulic actuating element are respectively connected with a second group of actuating valve ports of the second reversing valve; and the controller is connected with the first reversing valve and the second reversing valve and is used for controlling the switching action of the first reversing valve and the second reversing valve.
The support leg hydraulic control system provided by the invention controls the switching actions of the first reversing valve and the second reversing valve through the controller so as to respectively control the actions of the first hydraulic executive component and the second hydraulic executive component. The action of the first reversing valve is used for realizing that one executing valve port of the two executing valve ports of the first reversing valve is opened, and the other executing valve port of the first reversing valve is closed, so that hydraulic oil enters the second reversing valve through one oil inlet valve port of the second reversing valve or enters the second reversing valve through the other oil inlet valve port of the second reversing valve. The action of the second reversing valve is used for realizing that one of the first group of execution valve ports and the second group of execution valve ports of the second reversing valve is opened, and the other group of execution valve ports is closed, so that hydraulic oil enters the first hydraulic execution element through the first group of execution valve ports of the second reversing valve to realize the action of the first hydraulic execution element, or hydraulic oil enters the second hydraulic execution element through the second group of execution valve ports of the second reversing valve to realize the action of the second hydraulic execution element.
Compare in landing leg hydraulic control system among the correlation technique, this application passes through the switching action of first switching-over valve of controller control and second switching-over valve to control first hydraulic actuator and second hydraulic actuator action respectively, two hydraulic actuator connect respectively in the oil circuit, can not act simultaneously, reduce the malfunction risk, and two hydraulic actuator all are connected with the second switching-over valve, optimized the tube coupling, make things convenient for later stage operation to maintain, the troubleshooting trouble is simpler.
In addition, according to the leg hydraulic control system in the above technical solution provided by the present invention, the following additional technical features may also be provided:
in one possible design, the first reversing valve comprises: a first executing valve port and a second executing valve port; the second direction valve includes: the first oil inlet valve port is connected with the first execution valve port; and the second oil inlet valve port is connected with the second execution valve port.
In the design, the controller is used for controlling the switching action of the first reversing valve so as to respectively control the opening or closing of the first executing valve port and the second executing valve port, when the first reversing valve breaks down, the fault occurrence point can be timely checked and found, and the stable operation of the support leg hydraulic control system is ensured.
The first oil inlet valve port of the second reversing valve is connected with the first execution valve port of the first reversing valve, or the second oil inlet valve port of the second reversing valve is connected with the second execution valve port of the first reversing valve, and hydraulic oil can enter the second reversing valve from the first reversing valve. According to the action of the second reversing valve, hydraulic oil enters the first hydraulic execution element through the first group of execution valve ports or enters the second hydraulic execution element through the second group of execution valve ports, so that the two hydraulic execution elements are respectively connected in an oil way, the two hydraulic execution elements cannot act simultaneously, and the misoperation risk is reduced.
In one possible design, the first hydraulic actuator is a first hydraulic cylinder, the second hydraulic actuator is a second hydraulic cylinder, and the two oil ports are a rod cavity oil port and a rodless cavity oil port respectively.
In the design, the first hydraulic actuating element is set as a first hydraulic oil cylinder, a rod cavity oil port and a rodless cavity oil port of the first hydraulic oil cylinder are respectively connected with a first group of actuating valve ports of the second reversing valve, and then hydraulic oil enters the rod cavity or the rodless cavity of the first hydraulic oil cylinder through the second reversing valve, so that the action of the first hydraulic oil cylinder is controlled. And the second hydraulic actuating element is set as a second hydraulic cylinder, and a rod cavity oil port and a rodless cavity oil port of the second hydraulic cylinder are respectively connected with a second group of actuating valve ports of a second reversing valve, so that hydraulic oil enters the rod cavity or the rodless cavity of the second hydraulic cylinder through the second reversing valve, and the action of the second hydraulic cylinder is controlled. By adopting the arrangement, the two hydraulic oil cylinders are respectively connected in the oil circuit and cannot act simultaneously.
In one possible design, the first set of implement valve ports includes: the third execution valve port is communicated with the first rodless cavity oil port of the first hydraulic execution element; the fourth execution valve port is communicated with the first rod cavity oil port of the first hydraulic execution element; the second set of implement valve ports includes: the fifth execution valve port is communicated with a second rodless cavity oil port of the second hydraulic execution element; and the sixth execution valve port is communicated with the second rod cavity oil port of the second hydraulic execution element.
In the design, the four execution valve ports of the second reversing valve are respectively communicated with the first rodless cavity oil port of the first hydraulic execution element, the first rod cavity oil port of the first hydraulic execution element, the second rodless cavity oil port of the second hydraulic execution element and the second rod cavity oil port of the second hydraulic execution element, so that the actions of the first hydraulic execution element and the second hydraulic execution element are respectively controlled. When the second reversing valve breaks down, the fault occurrence point can be checked in time, and the stable operation of the support leg hydraulic control system is ensured.
In one possible design, the controller controls the second reversing valve to lose power, the first oil inlet valve port is communicated with the fourth execution valve port, and the second oil inlet valve port is communicated with the third execution valve port; the controller controls the second reversing valve to be electrified, the first oil inlet valve port is communicated with the sixth execution valve port, and the second oil inlet valve port is communicated with the fifth execution valve port.
In the design, the conduction relation between the first oil inlet valve port, the second oil inlet valve port and the execution valve port of the second reversing valve is changed through the action of the second reversing valve, so that the first hydraulic execution element and the second hydraulic execution element are respectively controlled. Compared with a supporting leg hydraulic control system in the related art, the supporting leg hydraulic control system can prevent two hydraulic execution elements from being connected in an oil way at the same time, reduce misoperation risks and optimize pipeline connection.
In one possible design, the controller controls the electromagnetic coil of the first reversing valve to be electrified and switched to the first working position, the second reversing valve is electrified, the first oil inlet valve port is communicated with the fourth execution valve port, and hydraulic oil is supplied to the first rod cavity oil port of the first hydraulic execution element through the fourth execution valve port; the controller controls the electromagnetic coil of the first reversing valve to be electrified and switched to a second working position, the second reversing valve is electrified, the second oil inlet valve port is communicated with the third execution valve port, and hydraulic oil is supplied to the first rodless cavity oil port of the first hydraulic execution element through the third execution valve port; the controller controls the electromagnetic coil of the first reversing valve to be electrified and switched to a first working position, the second reversing valve is electrified, the first oil inlet valve port is communicated with the sixth execution valve port, and hydraulic oil is supplied to the second rod cavity oil port of the second hydraulic execution element through the sixth execution valve port; the controller controls the electromagnetic coil of the first reversing valve to be electrified and switched to a second working position, the second reversing valve is electrified, the second oil inlet valve port is communicated with the fifth execution valve port, and hydraulic oil is supplied to the second rodless cavity oil port of the second hydraulic execution element through the fifth execution valve port.
In the design, the controller controls the first reversing valve and the second reversing valve to be powered on or powered off, so that the two hydraulic actuators can respectively act, and compared with a support leg hydraulic control system in the related art, the support leg hydraulic control system provided by the embodiment has simpler electrical logic control.
In one possible design, the first reversing valve is a three-position, four-way solenoid valve and the second reversing valve is a two-position, six-way solenoid valve or two-position, three-way solenoid valves.
In the design, the first reversing valve is a three-position four-way electromagnetic valve which comprises an oil inlet valve port and two execution valve ports, and the controller is used for controlling the power-on or power-off of the electromagnetic coil so as to respectively control the opening or closing of the two execution valve ports. The second reversing valve is a two-position six-way electromagnetic valve which comprises two oil inlet valve ports and four execution valve ports, the two oil inlet valve ports of the two-position six-way electromagnetic valve are respectively connected with the two execution valve ports of the multi-way valve, and the controller controls the two-position six-way electromagnetic valve to be powered on or powered off so as to respectively control the conduction states between the two oil inlet valve ports and the four execution valve ports. Or the second reversing valve is two-position three-way electromagnetic valves, the principle is similar to that of the two-position six-way electromagnetic valve, each two-position three-way electromagnetic valve comprises an oil inlet valve port and two execution valve ports, and the controller controls the power-on or power-off of the two-position three-way electromagnetic valve so as to respectively control the conduction state between the oil inlet valve port and the two execution valve ports. Compared with a supporting leg hydraulic control system in the related art, the reversing valve is a four-position four-way electromagnetic valve, the cost of the four-position four-way electromagnetic valve is much higher than that of a three-position four-way electromagnetic valve, a two-position six-way electromagnetic valve and a two-position three-way electromagnetic valve, and the cost of the supporting leg hydraulic control system in the embodiment is greatly reduced.
In one possible design, the first reversing valve is provided with an emergency handle for manual or mechanical switching action.
In the design, an emergency handle is arranged on the first reversing valve for manual or mechanical switching action, so that the first reversing valve is switched to the first working position or the second working position. When the emergency handle is arranged for manual switching action, manual emergency operation in a non-electric state can be realized, and stable operation of the support leg hydraulic control system is guaranteed.
A second aspect of the invention proposes a work vehicle comprising: the hydraulic control system of the first support leg and the hydraulic control system of the second support leg are respectively the hydraulic control system of the support leg in any one of the technical schemes.
The working vehicle provided by the invention has the advantages of any one of the above technical schemes due to the hydraulic control system of the support leg, and thus the working vehicle is not described herein again.
In one possible design, a first hydraulic actuator of the first leg hydraulic control system is a telescopic oil cylinder and controls the extension and retraction of a first telescopic leg of the work vehicle, and a second hydraulic actuator of the first leg hydraulic control system is a support oil cylinder and controls the lower support and retraction of the first support leg of the work vehicle; the first hydraulic actuator of the second support leg hydraulic control system is a telescopic oil cylinder and controls the extension and retraction of a second telescopic support leg of the working vehicle, and the second hydraulic actuator of the second support leg hydraulic control system is a support oil cylinder and controls the lower support and retraction of a second support leg of the working vehicle.
In this design, the work vehicle can be fire engine or other work vehicles, first flexible landing leg and the first support landing leg through first landing leg hydraulic control system control vehicle, the second flexible landing leg and the second support landing leg through second landing leg hydraulic control system control vehicle, and two landing leg hydraulic control systems are connected with same oil supply, receive same controller control, like this, through the control of controller to four switching-over valves, can realize first flexible landing leg and the flexible landing leg synchronization action of second, first support landing leg and the second support landing leg synchronization action, compare in the landing leg hydraulic control system among the correlation technique, the electrical logic control of the landing leg hydraulic control system that this embodiment provided is simpler.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, 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 is a schematic structural view showing a leg hydraulic control system in the related art;
fig. 2 shows a schematic structural diagram of a leg hydraulic control system according to an embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:
100 ' reversing valve, 200 ' oil source and 300 ' supporting leg oil cylinder;
100 first directional control valve, 102 inlet port, 104 first implement port, 106 second implement port, 108 solenoid coil, 110 emergency handle, 112 first operating position, 114 second operating position, 200 second directional control valve, 202 first inlet port, 204 second inlet port, 206 third implement port, 208 fourth implement port, 210 fifth implement port, 212 sixth implement port, 300 oil source, 400 first hydraulic implement element, 402 first rodless cavity port, 404 first rod cavity port, 500 second hydraulic implement element, 502 second rodless cavity port, 504 second rod cavity port, 600 first leg hydraulic control system, 700 second leg hydraulic control system.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments 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.
A leg hydraulic control system and a work vehicle according to some embodiments of the present invention are described below with reference to fig. 2.
The first embodiment is as follows:
as shown in fig. 2, a leg hydraulic control system includes: the first reversing valve 100, wherein the oil inlet valve port 102 of the first reversing valve 100 is used for connecting an oil source 300; the two oil inlet ports of the second reversing valve 200 are respectively connected with the two execution ports of the first reversing valve 100; two oil ports of the first hydraulic actuator 400 are respectively connected with a first group of actuating valve ports of the second directional valve 200; two oil ports of the second hydraulic actuator 500 are respectively connected with a second group of actuating valve ports of the second directional valve 200; and a controller connected to the first direction valve 100 and the second direction valve 200 for controlling the switching operation of the first direction valve 100 and the second direction valve 200.
According to the support leg hydraulic control system provided by the invention, the oil inlet valve port 102 of the first reversing valve 100 is connected with the oil source 300, so that hydraulic oil output by the oil source 300 enters the first reversing valve through the oil inlet valve port 102. Two executing valve ports of the first direction valve 100 are respectively connected with two oil inlet valve ports of the second direction valve 200, so that hydraulic oil enters the second direction valve 200 through the first direction valve 100. Connecting two oil ports of the first hydraulic actuator 400 with a first set of actuator ports of the second directional valve 200 to realize that hydraulic oil enters the first hydraulic actuator 400 through the second directional valve 200; two oil ports of the second hydraulic actuator 500 are connected with the second set of actuator ports of the second directional valve 200, so that hydraulic oil enters the second hydraulic actuator 500 through the second directional valve 200.
The controller controls the switching operation of the first switching valve 100 and the second switching valve 200 to control the operation of the first hydraulic actuator 400 and the second hydraulic actuator 200, respectively. The action of the first directional valve 100 is to open one of the two executing valve ports of the first directional valve 100 and close the other executing valve port, so that hydraulic oil enters the second directional valve 200 through one of the oil inlet valve ports of the second directional valve 200 or enters the second directional valve 200 through the other oil inlet valve port of the second directional valve. The action of the second directional valve 200 is to open one of the first and second groups of implement valve ports of the second directional valve 200, and close the other group of implement valve ports, so that hydraulic oil enters the first hydraulic actuator 400 through the first group of implement valve ports of the second directional valve 200 to implement the action of the first hydraulic actuator 400, or hydraulic oil enters the second hydraulic actuator 500 through the second group of implement valve ports of the second directional valve 200 to implement the action of the second hydraulic actuator 500.
Compare in landing leg hydraulic control system among the correlation technique, this application passes through the switching action of first switching-over valve 100 of controller control and second switching-over valve 200, in order to control first hydraulic actuator 400 and the action of second hydraulic actuator 500 respectively, two hydraulic actuator connect respectively in the oil circuit, can not act simultaneously, reduce the malfunction risk, and two hydraulic actuator all are connected with second switching-over valve 200, the pipe connection has been optimized, the overall arrangement of being convenient for, make things convenient for later stage operation and maintenance, it is simpler to investigate the trouble.
Specifically, the oil source 300 is a main pump that outputs hydraulic oil to the first directional valve 100.
Example two:
on the basis of the first embodiment, the first direction valve 100 is further defined to include: a first implement port 104 and a second implement port 106; the second direction valve 200 includes: a first oil-in valve port 202, wherein the first oil-in valve port 202 is connected with the first execution valve port 104; a second oil-in valve port 204, wherein the second oil-in valve port 204 is connected with the second implement valve port 106.
In this embodiment, the controller controls the switching action of the first direction valve 100 to control the opening or closing of the first execution valve port 104 and the second execution valve port 106, so that when the first direction valve 100 fails, a failure occurrence point can be found in time, and the stable operation of the leg hydraulic control system is ensured.
The first oil inlet port 202 of the second direction valve 200 is connected with the first execution port 104 of the first direction valve 100, or the second oil inlet port 204 of the second direction valve 200 is connected with the second execution port 106 of the first direction valve 100, so that hydraulic oil can enter the second direction valve 200 from the first direction valve 100. The first group of execution valve ports are connected with the first hydraulic execution element 400, the second group of execution valve ports are connected with the second hydraulic execution element 500, and according to the action of the second reversing valve, hydraulic oil enters the first hydraulic execution element 400 through the first group of execution valve ports or enters the second hydraulic execution element 500 through the second group of execution valve ports, so that the two hydraulic execution elements are respectively connected in an oil way, the two hydraulic execution elements cannot act simultaneously, and the misoperation risk is reduced.
Example three:
on the basis of the second embodiment, the first hydraulic actuator 400 is further defined as a first hydraulic cylinder, the second hydraulic actuator 500 is further defined as a second hydraulic cylinder, and the two oil ports are a rod cavity oil port and a rodless cavity oil port respectively.
In this embodiment, the first hydraulic actuator 400 is configured as a first hydraulic cylinder, and a rod chamber oil port and a rodless chamber oil port of the first hydraulic cylinder are respectively connected to the first group of actuator valve ports of the second directional valve 200, so that hydraulic oil enters the rod chamber or the rodless chamber of the first hydraulic cylinder through the second directional valve 200, thereby controlling the operation of the first hydraulic cylinder. The second hydraulic actuator 500 is set as a second hydraulic cylinder, and a rod cavity oil port and a rodless cavity oil port of the second hydraulic cylinder are respectively connected with the second group of actuator valve ports of the second directional control valve 200, so that hydraulic oil enters the rod cavity or the rodless cavity of the second hydraulic cylinder through the second directional control valve 200, and the action of the second hydraulic cylinder is controlled. By adopting the arrangement, the two hydraulic oil cylinders are respectively connected in the oil circuit and cannot act simultaneously.
Example four:
on the basis of the third embodiment, further defining that the first group of implement valve ports comprises: a third implement port 206, the third implement port 206 being in communication with the first rod chamber port 402 of the first hydraulic actuator 400; a fourth implement port 208, the fourth implement port 208 being in communication with the first rod chamber port 404 of the first hydraulic actuator 400; the second set of implement valve ports includes: the fifth execution valve port 210, the fifth execution valve port 210 is communicated with the second rodless cavity oil port 502 of the second hydraulic execution element 500; the sixth implement valve port 212, the sixth implement valve port 212 is communicated with the second rod chamber oil port 504 of the second hydraulic implement 500.
In this embodiment, the third actuator port 206 of the first set of actuator ports is connected to the first rod chamber port 402 of the first hydraulic actuator 400, and when the third actuator port 206 is opened, hydraulic oil enters the first rod chamber port 402 of the first hydraulic actuator 400 and the first hydraulic actuator 400 is extended. The fourth actuation valve port 208 of the first set of actuation valve ports is communicated with the first rod chamber port 404 of the first hydraulic actuator 400, when the fourth actuation valve port 208 is opened, hydraulic oil enters the first rod chamber port 404 of the first hydraulic actuator 400, and the first hydraulic actuator 400 is retracted. The fifth execution valve port 210 in the second set of execution valve ports is communicated with the second rodless cavity oil port 502 of the second hydraulic execution element 500, when the fifth execution valve port 210 is opened, hydraulic oil enters the second rodless cavity oil port 502 of the second hydraulic execution element 500, and the second hydraulic execution element 500 extends out. The sixth implement valve port 212 is connected to the second rod chamber oil port 504 of the second hydraulic implement 500, and when the sixth implement valve port 212 is opened, hydraulic oil enters the second rod chamber oil port 504 of the second hydraulic implement 500, and the second hydraulic implement retracts.
The four actuating ports of the second directional valve 200 are respectively communicated with the first rodless cavity oil port 402 of the first hydraulic actuating element 400, the first rod cavity oil port 404 of the first hydraulic actuating element 400, the second rodless cavity oil port 502 of the second hydraulic actuating element 500 and the second rod cavity oil port 504 of the second hydraulic actuating element 500, so that the actions of the first hydraulic actuating element 400 and the second hydraulic actuating element 500 are respectively controlled. When the second reversing valve 200 breaks down, the fault occurrence point can be checked in time, and the stable operation of the support leg hydraulic control system is ensured.
Example five:
on the basis of the fourth embodiment, the controller is further limited to control the second directional valve 200 to lose power, the first oil-inlet port 202 is communicated with the fourth implement port 208, and the second oil-inlet port 204 is communicated with the third implement port 206; the controller controls the second directional valve 200 to be powered on, the first oil inlet port 202 is communicated with the sixth execution port 212, and the second oil inlet port 204 is communicated with the fifth execution port 210.
In this embodiment, when the second direction valve 200 is de-energized, the first oil inlet port 202 and the fourth execution port 208 are connected, the hydraulic oil enters the first rod chamber oil port 404 of the first hydraulic actuator 400, when the second direction valve 200 is energized, the first oil inlet port 202 and the sixth execution port 212 are connected, the hydraulic oil enters the second rod chamber oil port 504 of the second hydraulic actuator 500, and the path between the first oil inlet port 202 and the execution port of the second direction valve 200 is changed in different states of the direction valve 200. Similarly, when the second direction valve 200 is de-energized, the second oil inlet port 204 is connected to the third execute port 206, hydraulic oil enters the first rodless chamber port 402 of the first hydraulic actuator 400, when the second direction valve 200 is energized, the second oil inlet port 204 is connected to the fifth execute port 210, hydraulic oil enters the second rodless chamber port 502 of the second hydraulic actuator 500, and in different states of the direction valve 200, a path between the second oil inlet port 204 and the execute port of the second direction valve 200 is changed.
By the action of the second direction valve 200, the conduction relationship between the first oil inlet port 202, the second oil inlet port 204 and the execution ports of the second direction valve 200 is changed, so as to control the first hydraulic actuator 400 and the second hydraulic actuator 500 respectively. Compared with a supporting leg hydraulic control system in the related art, the supporting leg hydraulic control system can prevent two hydraulic execution elements from being connected in an oil way at the same time, reduce misoperation risks and optimize pipeline connection.
Example six:
on the basis of the fifth embodiment, further defining: the controller controls the solenoid coil 108 of the first directional control valve 100 to be switched to the first working position 112 when the second directional control valve 200 is de-energized, the first oil inlet port 202 is communicated with the fourth execution port 208, and the hydraulic oil is supplied to the first rod chamber oil port 404 of the first hydraulic execution element 400 through the fourth execution port 208. The controller controls the solenoid coil 108 of the first directional control valve 100 to be switched to the second working position 114 when the second directional control valve 200 is de-energized, the second oil inlet port 204 is communicated with the third execution port 206, and the hydraulic oil is supplied to the first rod chamber oil port 402 of the first hydraulic execution element 400 through the third execution port 206. The controller controls the solenoid coil 108 of the first directional control valve 100 to be powered on and switched to the first working position 112, and the second directional control valve 200 is powered on, the first oil inlet port 202 is communicated with the sixth execution port 212, and the hydraulic oil is supplied to the second rod chamber oil port 504 of the second hydraulic execution element 500 through the sixth execution port 212. The controller controls the solenoid coil 108 of the first directional valve 100 to be powered on and switched to the second working position 114, and the second directional valve 200 is powered on, the second oil inlet port 204 is communicated with the fifth execution port 210, and the hydraulic oil is supplied to the second rodless cavity oil port 502 of the second hydraulic execution element 500 through the fifth execution port 210.
In this embodiment, the controller controls the solenoid coil 108 of the first direction valve 100 to be electrically switched to the first working position 112 and the second direction valve 200 to be electrically de-energized, the first oil inlet port 202 is electrically connected to the fourth execution port 208, the hydraulic oil is supplied to the first rod chamber port 404 of the first hydraulic actuator 400 through the fourth execution port 208, and the first hydraulic actuator 400 is retracted. The controller controls the electromagnetic coil 108 of the first directional valve 100 to be switched to the second working position 114 when the power of the second directional valve 200 is lost, the second oil inlet port 204 is communicated with the third execution port 206, the hydraulic oil is supplied to the first rod chamber port 402 of the first hydraulic execution element 400 through the third execution port 206, and the first hydraulic execution element 400 extends out. The controller controls the electromagnetic coil 108 of the first directional valve 100 to be powered on and switched to the first working position 112, and the second directional valve 200 is powered on, the first oil inlet port 202 is communicated with the sixth execution port 212, the hydraulic oil is supplied to the second rod chamber oil port 504 of the second hydraulic actuator 500 through the sixth execution port 212, and the second hydraulic actuator 500 retracts. The controller controls the electromagnetic coil 108 of the first directional valve 100 to be powered on and switched to the second working position 114, and the second directional valve 200 is powered on, the second oil inlet port 204 is communicated with the fifth execution port 210, the hydraulic oil is supplied to the second rodless cavity oil port 502 of the second hydraulic execution element 500 through the fifth execution port 210, and the second hydraulic execution element 500 extends out.
The controller controls the first reversing valve 100 and the second reversing valve 200 to be powered on or powered off, so that the two hydraulic actuators can act respectively.
Further, the second direction valve 200 is disposed adjacent to the first hydraulic actuator 400 and the second hydraulic actuator 500.
The second direction valve 200 is arranged close to the first hydraulic actuator 400 and the second hydraulic actuator 500, so that the length of a connecting pipeline between an actuating valve port of the second direction valve 200 and the hydraulic actuators can be reduced, the cost can be saved, and meanwhile, the occupied space is small.
Example seven:
on the basis of any of the above embodiments, the first direction valve 100 is further limited to be a three-position four-way solenoid valve, and the second direction valve 200 is a two-position six-way solenoid valve or two-position three-way solenoid valves.
In this embodiment, the first direction valve 100 is a three-position four-way solenoid valve, the three-position four-way solenoid valve includes an oil inlet port and two execution ports, and the controller controls the two solenoids to be powered on or powered off to respectively control the two work positions of the direction valve to operate, so as to respectively control the two execution ports to be opened or closed. The second reversing valve 200 is a two-position six-way solenoid valve, the two-position six-way solenoid valve includes two oil inlet valve ports and four execution valve ports, the two oil inlet valve ports of the two-position six-way solenoid valve are respectively connected with the two execution valve ports of the multi-way valve, and the controller controls the two-position six-way solenoid valve to be powered on or powered off so as to respectively control the conduction states between the two oil inlet valve ports and the four execution valve ports. Or the second reversing valve 200 is two-position three-way electromagnetic valves, the principle is similar to that of the two-position six-way electromagnetic valve, each two-position three-way electromagnetic valve comprises an oil inlet valve port and two execution valve ports, and the controller controls the power-on or power-off of the two-position three-way electromagnetic valve so as to respectively control the conduction state between the oil inlet valve port and the two execution valve ports. Compared with the support leg hydraulic control system in the related art, as shown in fig. 1, the reversing valve 100' is a four-position four-way solenoid valve, the cost of the four-position four-way solenoid valve is higher than that of a multi-way valve, and the cost of the three-position four-way solenoid valve, that of a two-position six-way solenoid valve and that of a two-position three-way solenoid valve are higher than that of a multi-way valve.
Example eight:
the first directional valve 100 is provided with a panic handle 110 for manual or mechanical switching action.
In this embodiment, the emergency handle 110 is provided on the first direction valve 100 for manual or mechanical switching action to switch the first direction valve 100 to the first operating position 112 or to the second operating position 114. When the emergency handle 110 is used for manual switching, manual emergency operation in a non-power state can be realized, and stable operation of the support leg hydraulic control system is ensured.
Example nine:
a work vehicle comprising: the first leg hydraulic control system 600 and the second leg hydraulic control system 700, and the first leg hydraulic control system 600 and the second leg hydraulic control system 700 are leg hydraulic control systems in the above technical solutions, respectively.
The working vehicle provided by the invention has the advantages of any one of the above technical schemes due to the hydraulic control system of the support leg, and thus the working vehicle is not described herein again. Compared with a supporting leg hydraulic control system in the related art, as shown in fig. 1, four hydraulic actuators are controlled, eight oil inlet pipes are needed to be communicated with an oil source 200' in the supporting leg hydraulic control system in the related art, only four oil inlet pipes are needed to be communicated with the oil source 300 in the supporting leg hydraulic control system in the application, the number of pipelines is reduced by half, and the probability of misconnection is reduced. The first direction valve in the first leg hydraulic control system 600 and the first direction valve in the second leg hydraulic control system 700 may be integrated into one direction valve, and the second direction valve in the first leg hydraulic control system 600 and the second direction valve in the second leg hydraulic control system 700 may also be integrated into one direction valve. As shown in fig. 2, the first leg hydraulic control system 600 and the second leg hydraulic control system 700 may not be identical, for example, the connection relationship between the actuating valve port of the directional valve and the rod chamber oil port and the rodless chamber oil port of the hydraulic actuating element is changed, but the electrical control logic is the same and may be specifically set according to actual situations.
Example ten:
on the basis of the ninth embodiment, the first hydraulic actuator of the first leg hydraulic control system 600 is further limited to be a telescopic cylinder for controlling the extension and retraction of the first telescopic leg of the work vehicle, and the second hydraulic actuator of the first leg hydraulic control system 600 is a support cylinder for controlling the lower support and retraction of the first support leg of the work vehicle; the first hydraulic actuator of the second leg hydraulic control system 700 is a telescopic cylinder for controlling the extension and retraction of a second telescopic leg of the work vehicle, and the second hydraulic actuator of the second leg hydraulic control system 700 is a support cylinder for controlling the support and retraction of a second support leg of the work vehicle.
In this embodiment, the first telescopic leg and the first support leg of the work vehicle are controlled by the first leg hydraulic control system 600, the second telescopic leg and the second support leg of the work vehicle are controlled by the second leg hydraulic control system 700, and the two leg hydraulic control systems are connected to the same oil source 300 and controlled by the same controller. Compared with a supporting leg hydraulic control system in the related art, the supporting leg hydraulic control system provided by the embodiment has the advantages that the electrical logic control is simpler, the whole pipeline is convenient to arrange, and wrong connection is not easy to occur.
The work vehicle may be a fire truck or other work vehicle, such as a fire truck. The logic of the control of the support legs of the fire engine is as follows: the telescopic supporting legs extend out firstly and then support the supporting legs for supporting, and the two actions are in sequence and cannot be simultaneously carried out, so that the telescopic supporting legs and the supporting legs can be controlled by the same reversing valve. In particular, the telescoping legs may be replaced with swing legs.
In the present invention, the term "plurality" means two or more unless explicitly defined 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, 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 description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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 leg hydraulic control system, comprising:
the oil inlet valve port of the first reversing valve is used for connecting an oil source;
the two oil inlet valve ports of the second reversing valve are respectively connected with the two execution valve ports of the first reversing valve;
two oil ports of the first hydraulic actuating element are respectively connected with a first group of actuating valve ports of the second reversing valve;
two oil ports of the second hydraulic actuating element are respectively connected with a second group of actuating valve ports of the second reversing valve;
and the controller is connected with the first reversing valve and the second reversing valve and is used for controlling the first reversing valve and the second reversing valve to switch.
2. The leg hydraulic control system according to claim 1,
the first direction valve includes:
a first executing valve port and a second executing valve port;
the second direction valve includes:
the first oil inlet valve port is connected with the first execution valve port;
and the second oil inlet valve port is connected with the second execution valve port.
3. The leg hydraulic control system according to claim 2,
the first hydraulic execution element is a first hydraulic oil cylinder, the second hydraulic execution element is a second hydraulic oil cylinder, and the two oil ports are respectively a rod cavity oil port and a rodless cavity oil port.
4. The leg hydraulic control system according to claim 3,
the first set of implement valve ports comprises:
the third execution valve port is communicated with the first rodless cavity oil port of the first hydraulic execution element;
the fourth execution valve port is communicated with the first rod cavity oil port of the first hydraulic execution element;
the second set of implement valve ports comprises:
the fifth execution valve port is communicated with a second rodless cavity oil port of the second hydraulic execution element;
and the sixth execution valve port is communicated with the second rod cavity oil port of the second hydraulic execution element.
5. The leg hydraulic control system according to claim 4,
the controller controls the second reversing valve to lose power, the first oil inlet valve port is communicated with the fourth execution valve port, and the second oil inlet valve port is communicated with the third execution valve port;
the controller controls the second reversing valve to be electrified, the first oil inlet valve port is communicated with the sixth execution valve port, and the second oil inlet valve port is communicated with the fifth execution valve port.
6. The leg hydraulic control system according to claim 5,
the controller controls the electromagnetic coil of the first reversing valve to be electrified and switched to a first working position, the second reversing valve is electrified, the first oil inlet valve port is communicated with the fourth execution valve port, and hydraulic oil is supplied to the first rod cavity oil port of the first hydraulic execution element through the fourth execution valve port;
the controller controls the electromagnetic coil of the first reversing valve to be electrified and switched to a second working position, the second reversing valve is electrified, the second oil inlet valve port is communicated with the third execution valve port, and hydraulic oil is supplied to the first rodless cavity oil port of the first hydraulic execution element through the third execution valve port;
the controller controls the electromagnetic coil of the first reversing valve to be electrified and switched to a first working position, the second reversing valve is electrified, the first oil inlet valve port is communicated with the sixth execution valve port, and hydraulic oil is supplied to the second rod cavity oil port of the second hydraulic execution element through the sixth execution valve port;
the controller controls the electromagnetic coil of the first reversing valve to be electrified and switched to a second working position, the second reversing valve is electrified, the second oil inlet valve port is communicated with the fifth execution valve port, and hydraulic oil is supplied to the second rodless cavity oil port of the second hydraulic execution element through the fifth execution valve port.
7. The leg hydraulic control system according to any one of claims 1 to 6,
the first reversing valve is a three-position four-way electromagnetic valve,
the second reversing valve is a two-position six-way electromagnetic valve or two-position three-way electromagnetic valves.
8. The leg hydraulic control system according to any one of claims 1 to 6,
the first reversing valve is provided with an emergency handle for manual or mechanical switching action.
9. A work vehicle, characterized in that the work vehicle comprises:
a first leg hydraulic control system and a second leg hydraulic control system, each being a leg hydraulic control system as claimed in any one of claims 1 to 8.
10. The work vehicle according to claim 9,
the first hydraulic actuator of the first leg hydraulic control system is a telescopic oil cylinder and controls the extension and retraction of a first telescopic leg of the working vehicle, and the second hydraulic actuator of the first leg hydraulic control system is a support oil cylinder and controls the lower support and retraction of a first support leg of the working vehicle;
the first hydraulic execution element of the second supporting leg hydraulic control system is a telescopic oil cylinder and controls the extension and retraction of a second telescopic supporting leg of the working vehicle, and the second hydraulic execution element of the second supporting leg hydraulic control system is a supporting oil cylinder and controls the lower support and retraction of the second supporting leg of the working vehicle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010750396.7A CN111878476A (en) | 2020-07-30 | 2020-07-30 | Support leg hydraulic control system and work vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010750396.7A CN111878476A (en) | 2020-07-30 | 2020-07-30 | Support leg hydraulic control system and work vehicle |
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| CN111878476A true CN111878476A (en) | 2020-11-03 |
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| CN110985463A (en) * | 2019-12-26 | 2020-04-10 | 中联重科股份有限公司 | Control unit, hydraulic system and lifting operation platform |
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| CN102996553A (en) * | 2012-11-27 | 2013-03-27 | 三一重工股份有限公司 | Support leg hydraulic system and engineering machinery |
| CN103307050A (en) * | 2013-06-25 | 2013-09-18 | 中联重科股份有限公司 | Multistage landing leg hydraulic control system and control method of multistage landing leg hydraulic control system |
| US10106386B2 (en) * | 2015-05-14 | 2018-10-23 | Kabushiki Kaisha Toyota Jidoshokki | Hydraulic control device of a forklift truck |
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