CN216447218U - Hydraulic valve group, hydraulic drive system and working vehicle - Google Patents
Hydraulic valve group, hydraulic drive system and working vehicle Download PDFInfo
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- CN216447218U CN216447218U CN202123233181.7U CN202123233181U CN216447218U CN 216447218 U CN216447218 U CN 216447218U CN 202123233181 U CN202123233181 U CN 202123233181U CN 216447218 U CN216447218 U CN 216447218U
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Abstract
The utility model provides a hydraulic valve group, a hydraulic driving system and a working vehicle, wherein the hydraulic valve group comprises: a working valve; the first control valve group is connected with the working valve and used for controlling the working state of the working valve; and the second control valve group is connected with the working valve and used for controlling the working state of the working valve when the first control valve group breaks down. The hydraulic valve group of this application through on the basis of original valve group, has newly increased the second valve group again, is equivalent to emergency module, can be when original control valve breaks down, perhaps under the emergency situation, can operate equipment, makes the current operation of equipment completion, guarantees that the working process does not receive the influence. The hydraulic valve bank is good in universality, high in compatibility, strong in reliability and wide in applicability, and can be applied to various hydraulic systems and operating equipment.
Description
Technical Field
The utility model relates to the technical field of hydraulic engineering, in particular to a hydraulic valve group, a hydraulic driving system and an operating vehicle.
Background
At present, the main approach for solving the problem of failure of the reversing control function of the reversing valve group in the prior art is to arrange an additional set of electric emergency operation box or replace the electromagnetic valve by field service personnel on site to eliminate faults. But the electric emergency operation box cannot solve the faults caused by power failure, power failure and damage of the solenoid valve coil. And adopt on-spot troubleshooting to solve the trouble, not only need professional after-sales service personnel to go on, troubleshooting work is consuming time moreover, if can't make the switching-over valves resume work in the short time, causes economic losses such as material waste and equipment damage easily.
Therefore, how to design a hydraulic valve group with simple structure, reliable work, convenient operation and emergency work function is a problem to be solved urgently at present.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art or the related art.
It is therefore an object of the present invention to provide a hydraulic valve pack.
Another object of the present invention is to provide a hydraulic drive system including the above hydraulic valve block.
A third object of the present invention is to provide a work vehicle comprising the above-described hydraulic valve pack or hydraulic drive system.
In order to achieve the above object, the present invention provides a hydraulic valve set, including: a working valve; the first control valve group is connected with the working valve and used for controlling the working state of the working valve; and the second control valve group is connected with the working valve and used for controlling the working state of the working valve when the first control valve group breaks down.
The hydraulic valve group provided by the utility model comprises a working valve, a first control valve group and a second control valve group. Both ends of the working valve are provided with hydraulic control ports, so that the working state of the working valve can be controlled through the hydraulic control ports. The first control valve group is connected with the working valve and can control the working state of the working valve, the second control valve group is also connected with the working valve, and the working state of the working valve can be controlled when the first control valve group breaks down. This application is through on original valve unit's basis, newly increased the second valve unit again, is equivalent to emergency module, can be when original control valve breaks down, perhaps under the emergent condition, can also operate equipment, makes equipment accomplish the current operation, guarantees that the working process does not receive the influence, especially when the control valve unit is the electromagnetism valves control in hydraulic system, the effect of the hydraulic pressure valves that this application provided is very obvious. The hydraulic valve bank is good in universality, high in compatibility, strong in reliability and wide in applicability, and can be applied to various hydraulic systems and operating equipment.
Specifically, if when using the hydraulic valve group of this application on concrete pump truck, because the pump sending hydraulic system realizes two drive cylinder's reversal in turn through the switching-over valve that surges in the switching-over valve group (be the working valve in this application) to drive two delivery cylinders and realize continuous defeated material, the switching-over function of switching-over valve group liquid accuse directional valve is through setting up two way guide's working oil branch that lead the solenoid directional valve (be the first control valve in this application) in the main valve piece do not act on liquid accuse directional valve case both ends and realize. The pilot electromagnetic directional valve realizes the change of the liquid flow direction by electrifying or cutting off the electromagnet through an electric signal, but in the actual work, the failure rate of the reversing control function of the reversing valve group caused by the faults and the power failure of an electric control system, the power failure and the damage of the electromagnetic valve coil is relatively high. Switching-over valves switching-over control function inefficacy can influence the transport of concrete material, and when this function can't resume in the short time, can lead to remaining concrete and the concrete that stops in pump truck conveying system to solidify, cause economic losses such as concrete waste and equipment damage, thereby the hydraulic pressure valves that this application provided, through extra increase the second control valves again, also can control its switching-over valve that surges when leading the electromagnetism switching-over valve to damage earlier and carry out work, the instant transport of concrete material has been guaranteed.
In addition, the technical scheme provided by the application can also have the following additional technical characteristics:
in the above technical scheme, the first control valve group comprises two control oil paths, each control oil path comprises a first control valve and a first oil path, and the first control valve is communicated with the hydraulic control port of the working valve through the first oil path.
In this technical scheme, first valve unit includes two control oil circuit, and every control oil circuit all includes first control valve and first oil circuit, and every first control valve all communicates through the liquid accuse mouth of first oil circuit with the working valve to can be through controlling the oil circuit state between first control valve and the working valve liquid accuse mouth, and then the operating condition of control working valve, change the direction of the output oil of working valve.
The first control valve can be an electromagnetic valve, so that the first control valve can be controlled more conveniently, and the working valve can be a hydraulic reversing valve and the like.
Further, the first control valve is a two-position four-way electromagnetic directional valve.
In the technical scheme, the working valve is internally provided with the oil inlet channel and the oil return channel, and the working valve controls the oil inlet direction and the oil return direction through the oil inlet channel and the oil return channel.
In the technical scheme, an oil inlet channel and an oil return channel are arranged in the working valve, and the working valve controls the oil inlet direction and the oil return direction through the oil inlet channel and the oil return channel. It can be understood that one end of the working valve is connected with the load and controls the load to work, and the other end of the working valve is connected with the oil tank, and oil in the oil tank is conveyed to the load through the working valve to ensure that the load can work normally.
In the above technical solution, the second control valve group includes: and the emergency valve is internally provided with an oil passage, one end of the oil passage is communicated with the hydraulic control port of the working valve and is used for supplying oil and returning oil to the hydraulic control port and connecting or disconnecting the first oil way when the first control valve group breaks down, and one end of the oil passage is communicated with the oil tank.
In this technical scheme, the second valve unit includes emergency valve, is provided with the oily passageway in the emergency valve, crosses the one end of oily passageway and the liquid accuse mouth intercommunication of working valve, can be when first valve unit breaks down, for liquid accuse mouth fuel feeding and oil return to guarantee the maneuverability of working valve, cross the one end and the oil tank intercommunication of oily passageway simultaneously, thereby fluid in the oil tank can carry to the liquid accuse mouth of working valve, and then control the working valve. Meanwhile, the emergency valve can directly control the emergency valve to disconnect the first oil way when the first control valve group breaks down, and simultaneously communicate the oil passing channel of the emergency valve with the hydraulic control port of the working valve, so that the working state of the working valve is controlled.
In the above technical solution, the emergency valve includes a manual directional valve and/or an automatic directional valve.
In this technical scheme, emergency valve can be the hand-operated directional control valve, and when first valve unit broke down, the operator can direct manually operation emergency valve, and then breaks off first oil circuit, and the pilot operated mouth of intercommunication emergency valve and working valve is applicable to when needing artificial judgement operating condition more. Of course, the emergency valve may also be an automatic reversing valve, and when the system determines that the first control valve group is out of order, the emergency valve is automatically controlled to work correspondingly.
In the above technical solution, the second control valve group includes: the second control valve is internally provided with an oil passage; and the second oil path is used for communicating one end of the oil passing channel with the hydraulic control port of the working valve and supplying oil and returning oil to the hydraulic control port when the first control valve group fails, and one end of the oil passing channel is communicated with the oil tank.
In this technical scheme, the second control valve group includes second control valve and second oil circuit. Be provided with the oil passage in the second control valve, the second oil circuit will cross the one end of oil passage and the liquid accuse mouth intercommunication of working valve, can be when first valve unit breaks down, for liquid accuse mouth fuel feeding and oil return to guarantee the maneuverability of working valve, cross the one end and the oil tank intercommunication of oil passage simultaneously, thereby fluid in the oil tank can be carried to the liquid accuse mouth of working valve through second oil circuit, second control valve, and then control the working valve.
In the above technical scheme, a cut-off switch is arranged on the first oil path and used for connecting or disconnecting the first oil path.
In the technical scheme, a cut-off switch is arranged on the first oil way and can be used for connecting or disconnecting the first oil way. When the first control valve breaks down, power failure or coil damage and the like are realized, so that the first control valve becomes inoperable, and therefore, if the first oil way is in an oil communicating state with the working valve before the first control valve is damaged, the first oil way still can keep in the oil communicating state with the working valve after the first control valve is damaged, so that the load is always in the same working state, and accidents are likely to happen. Of course, in the normal functional state, the cut-off switch connects the first oil passage.
In the above technical solution, each of the two control oil passages further includes a third oil passage correspondingly communicated with the first control valve; one of the two third oil passages is used for oil supply, and the other of the two third oil passages is used for oil return.
In this technical scheme, two control oil circuit all still include the third oil circuit that corresponds the intercommunication with first control valve, and one in two third oil circuit is used for the fuel feeding, and another in two third oil circuit is used for the oil return. It will be appreciated that the third passage is a conduit communicating with the first control valve and is capable of delivering oil to the first control valve or returning oil returned through the first control valve to the tank via the third passage.
In the above technical scheme, the hydraulic valve group further comprises a valve body and an overflow valve, and the working valve, the first control valve group, the second control valve group, the emergency valve and the like can be arranged in the valve body.
In the technical scheme, the working valve, the first control valve group, the second control valve group, the emergency valve and the like are arranged in the valve body. Make the hydraulic pressure valves integrated level of this application high, compact structure, with emergency module integration in the main valve body, reduced hydraulic pressure pipe connection, the effectual hydraulic system that has simplified.
In the technical scheme, the valve body is provided with an oil inlet, an oil return port, an oil drainage port, a plurality of external oil ports and a working oil port, the oil inlet and the oil return port are communicated with the working valve, the oil drainage port is communicated with the first control valve group through a third oil path, the external oil ports are communicated with the second control valve group through a second oil path, the external oil ports are communicated with the first control valve through the third oil path, the oil inlet is communicated with the first control valve through the third oil path, and the working oil port is communicated with the working valve.
And further, a shuttle valve is arranged on a third oil path where the oil inlet and the external oil port are communicated with the first control valve. The oil inlet and the external oil port selectively supply oil to the first control valve through the shuttle valve.
The technical scheme of the second aspect of the utility model provides a hydraulic driving system, which comprises the hydraulic valve bank of the technical scheme of the first aspect. And the load is communicated with the working valve of the hydraulic valve group and can work under the action of the working valve.
According to the hydraulic drive system provided by the utility model, the hydraulic valve group provided by the technical scheme of the first aspect is included. Therefore, the hydraulic drive system provided by the utility model has all the beneficial effects of the hydraulic valve bank provided by the technical scheme of the first aspect, and details are not repeated herein.
A third aspect of the present invention provides a work vehicle, including the hydraulic valve group according to the first aspect; or the hydraulic drive system according to the second aspect.
According to the work vehicle provided by the utility model, the hydraulic valve group provided by the first aspect or the hydraulic driving system provided by the second aspect is included. Therefore, the work vehicle provided by the present invention has all the advantages of the hydraulic valve group provided by the first aspect or the hydraulic drive system provided by the second aspect, which are not described herein again.
In the technical scheme, the operation vehicle can be a concrete pump truck, a heading machine, a road roller and the like.
When the working vehicle is a concrete pump vehicle, an external oil port of the hydraulic valve group can be connected with an energy accumulator arranged in a hydraulic system of the pump truck through a pipeline, an oil inlet can be connected with a hydraulic pump in the hydraulic system of the pump truck through a pipeline, and the energy accumulator and pressure oil of the hydraulic pump provide stable control oil for the first control valve group after being selected through a shuttle valve; the oil return port and the oil drain port can be connected with a hydraulic oil tank arranged in a hydraulic system of the pump truck through pipelines; the two working oil ports can be respectively connected with two driving oil cylinders arranged in a hydraulic system of the pump truck through pipelines.
Additional aspects and advantages of the utility model 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 utility model.
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 diagram of a hydraulic valve group provided by an embodiment of the utility model in normal operation;
fig. 2 is a schematic structural diagram of a hydraulic valve group provided by an embodiment of the utility model when a fault occurs.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:
1 valve body, 10 working valves, 11 first control valves, 12 emergency valves, 13 first oil ways, 14 second oil ways, 15 third oil ways, 16 hydraulic control ports, 2 oil inlets, 3 oil return ports, 4 oil drain ports, 5 working oil ports, 6 external oil ports, 7 shuttle valves and 8 overflow valves.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the utility model, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. 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.
Example one
As shown in fig. 1 and 2, a first embodiment of the present invention provides a hydraulic valve block. The hydraulic valve group comprises a working valve 10, a first control valve group and a second control valve group. The first control valve set is connected to the working valve 10 for controlling the working state of the working valve 10. The second control valve group is connected to the working valve 10, and is used to control the working state of the working valve 10 when the first control valve group fails.
The hydraulic valve group provided by the utility model comprises a working valve 10, a first control valve group and a second control valve group. Both ends of the working valve 10 are provided with pilot ports 16 so that the operating state of the working valve 10 can be controlled through the pilot ports 16. The first control valve group is connected with the working valve 10 to control the working state of the working valve 10, and the second control valve group is also connected with the working valve 10 to control the working state of the working valve 10 when the first control valve group fails. This application is through on original valve unit's basis, newly increased the second valve unit again, is equivalent to emergency module, can be when original control valve breaks down, perhaps under the emergency situation, can also operate equipment, makes the equipment accomplish current operation, guarantees that the working process does not receive the influence. The hydraulic valve bank is high in integration level and compact in structure, the emergency module is integrated in the main valve body 1, hydraulic pipeline connection is reduced, and a hydraulic system is effectively simplified. The hydraulic valve bank is good in universality, high in compatibility, strong in reliability and wide in applicability, and can be applied to various hydraulic systems and operating equipment.
Specifically, if when the hydraulic valve group of this application is used on the concrete pump truck, because the pumping hydraulic system realizes the alternate switching-over of two drive oil cylinders through the hydraulic change-over valve (namely the working valve 10 in this application) in the change-over valve group to drive two delivery cylinders to realize continuous material conveying, the switching-over function of the hydraulic control directional valve of the change-over valve group is realized through two way pilot working oil of the pilot electromagnetic change-over valve (namely the first control valve 11 in this application) that set up in the main valve block respectively acting on two ends of the valve core of the hydraulic control directional valve. The pilot electromagnetic directional valve realizes the change of the liquid flow direction by electrifying or powering off the electromagnet through an electric signal, but in the actual work, the failure rate of the directional control function of the directional valve bank caused by the failure, the outage and the damage of the electromagnetic valve coil of an electric control system is relatively high. Switching-over valves switching-over control function inefficacy can influence the transport of concrete material, and when this function can't resume in the short time, can lead to remaining concrete and the concrete that stops in pump truck conveying system to solidify, cause economic losses such as concrete waste and equipment damage, thereby the hydraulic pressure valves that this application provided, through extra increase the second control valves again, also can control its switching-over valve that surges when leading the electromagnetism switching-over valve to damage earlier and carry out work, the instant transport of concrete material has been guaranteed.
In the above embodiment, as shown in fig. 1 and 2, the first pilot valve group includes two pilot oil passages, each of which includes the first pilot valve 11 and the first oil passage 13, and the first pilot valve 11 communicates with the pilot port 16 of the working valve 10 through the first oil passage 13.
In this embodiment, the first pilot valve group includes two pilot oil passages, each of which includes the first pilot valve 11 and the first oil passage 13, and each of the first pilot valves 11 communicates with the pilot port 16 of the working valve 10 through the first oil passage 13, so that the direction of the output oil of the working valve 10 can be changed by controlling the state of the oil passages between the first pilot valve 11 and the pilot port 16 of the working valve 10 to control the operating state of the working valve 10.
Wherein the first control valve 11 may be an electromagnetic valve, so that the first control valve 11 can be controlled more conveniently.
Further, the first control valve 11 is a two-position four-way electromagnetic directional valve.
In the above embodiment, the working valve 10 is provided with the oil inlet passage and the oil return passage, and the working valve 10 controls the oil inlet direction and the oil return direction of the load through the oil inlet passage and the oil return passage.
In this embodiment, an oil inlet passage and an oil return passage are provided in the working valve 10, and the working valve 10 controls an oil inlet direction and an oil return direction of the load through the oil inlet passage and the oil return passage. It will be appreciated that the working valve 10 is connected to the load at one end and controls the load to operate, and is connected to the tank at the other end, and oil in the tank is delivered to the load through the working valve 10 to ensure that the load can operate normally.
In the above embodiment, the second control valve group includes: the second control valve is internally provided with an oil passage; and the second oil path 14 is used for communicating one end of the oil passing channel with the hydraulic control port 16 of the working valve 10 and supplying oil and returning oil to the hydraulic control port 16 when the first control valve group fails, and one end of the oil passing channel is communicated with the oil tank.
In this embodiment, the second control valve group includes a second control valve and a second oil passage 14. Be provided with the oil passage in the second control valve, second oil circuit 14 will cross the one end of oil passage and the hydraulic control mouth 16 intercommunication of working valve 10, can be when first valve unit breaks down, for 16 fuel feeding and oil return of hydraulic control mouth, thereby guarantee the maneuverability of working valve 10, cross the one end and the oil tank intercommunication of oil passage simultaneously, thereby fluid in the oil tank can be carried to the hydraulic control mouth 16 of working valve 10 through second oil circuit 14, second control valve, and then control working valve 10.
In the above embodiment, the first oil passage 13 is provided with a cut-off switch for connecting or disconnecting the first oil passage 13.
In this embodiment, the first oil passage 13 is provided with a cut-off switch that can turn on or off the first oil passage 13. When the first control valve 11 fails, the first control valve 11 is disabled due to power failure or coil damage, and therefore, if the first oil path 13 is in an oil communication state with the working valve 10 before the first control valve 11 is damaged, the first oil path 13 is still in an oil communication state with the working valve 10 after the first control valve 11 is damaged, which may cause the load to be always in the same working state, and thus an accident may occur, and therefore, by providing the cut-off switch on the first oil path 13, the first oil path 13 can be cut off in an emergency, so that the load stops working, and further, a guarantee is provided for the stability of the hydraulic valve bank. Of course, in the normal functional state, the cut-off switch connects the first oil passage 13.
In the above embodiment, the second control valve group includes: an oil passage is arranged in the emergency valve 12, one end of the oil passage is communicated with a hydraulic control port 16 of the working valve 10, and is used for supplying oil and returning oil to the hydraulic control port 16 when the first control valve group breaks down, the first oil passage 13 is communicated or disconnected, and one end of the oil passage is communicated with an oil tank.
In this embodiment, the second valve unit includes emergency valve 12, is provided with the oily passageway in the emergency valve 12, and the one end of crossing the oily passageway communicates with the hydraulic control mouth 16 of working valve 10, can be when first valve unit breaks down, for the 16 fuel feeding of hydraulic control mouth and oil return to guarantee the maneuverability of working valve 10, the one end and the oil tank intercommunication of the oily passageway of crossing simultaneously, thereby fluid in the oil tank can be carried to the hydraulic control mouth 16 of working valve 10, and then control working valve 10. Meanwhile, the emergency valve 12 can directly control the emergency valve 12 to disconnect the first oil path 13 when the first control valve group fails, and simultaneously communicate the oil passage of the emergency valve 12 with the hydraulic control port 16 of the working valve 10, so as to control the working state of the working valve 10.
In the above embodiments, the contingency valve 12 comprises a manual directional valve and/or an automatic directional valve.
In this embodiment, the emergency valve 12 may be a manual directional valve, and when the first control valve group fails, an operator may directly manually operate the emergency valve 12, so as to disconnect the first oil path 13 and communicate the second control valve with the hydraulic control port 16 of the working valve 10, which is more suitable for the time when the working state needs to be manually determined. Of course, the emergency valve 12 may also be an automatic reversing valve, and when the system determines that the first control valve group is faulty, the emergency valve 12 is automatically controlled to perform corresponding work.
Further, when the emergency valve 12 is a manual reversing valve, the emergency valve 12 can be limited, so that an operator can directly operate the emergency valve 12 without paying attention to the force and angle problems of operation, and the operator can control the emergency valve 12 more conveniently.
In the above embodiment, each of the two control oil passages further includes the third oil passage 15 that communicates correspondingly with the first control valve 11; one of the two third oil passages 15 is used for oil supply, and the other of the two third oil passages 15 is used for oil return.
In this embodiment, each of the two control oil passages further includes a third oil passage 15 that communicates correspondingly with the first control valve 11, one of the two third oil passages 15 being for oil supply, and the other of the two third oil passages 15 being for oil return. It will be appreciated that the third passage 15 is a conduit communicating with the first control valve 11 and is capable of supplying oil to the first control valve 11 or returning oil returned through the first control valve 11 to the tank via the third passage 15.
In the above embodiment, the hydraulic valve group further includes a valve body 1 and an overflow valve 8, and the working valve 10, the first control valve group, the second control valve group, the emergency valve 12, and the like are all disposed in the valve body 1.
In the above embodiment, the valve body 1 is provided with the oil inlet 2, the oil return port 3, the oil drain port 4, the plurality of external oil ports 6 and the working oil port 5, the oil inlet 2 and the oil return port 3 are communicated with the working valve 10, the oil drain port 4 is communicated with the first control valve group through the third oil path 15, the external oil ports 6 are communicated with the second control valve group through the second oil path 14, the external oil ports 6 are communicated with the first control valve 11 through the third oil path 15, the oil inlet 2 is communicated with the first control valve 11 through the third oil path 15, and the working oil port 5 is communicated with the working valve 10.
Further, a shuttle valve 7 is arranged on a third oil path 15 where the oil inlet 2 and the external oil port 6 are communicated with the first control valve 11. The oil inlet 2 and the external oil port 6 selectively supply oil to the first control valve 11 through the shuttle valve 7.
Further, the external oil port 6 and the like can be set to be of a quick oil insertion port structure.
Specifically, in an embodiment of the present application, a specific working principle of the embodiment of the present application can be described with reference to fig. 1 and fig. 2, when the first control valve is an electromagnetic valve, the hydraulic system is in a normal working mode, the emergency valve 12 is in a left position, at this time, the two electromagnetic valves are alternately powered under the action of the electrical control system, so that the control pressure oil from the working port of the shuttle valve respectively and alternately passes through the two electromagnetic valves, and alternately acts on the left and right hydraulic control ports of the working valve, so that the hydraulic valve group realizes a reversing function. Under the normal working mode, the reversing function of the hydraulic valve group is realized by controlling the electrification or the outage of the electromagnets of the two electromagnetic valves through electric signals.
When faults such as power failure, power failure and damage of an electromagnetic valve coil occur, the emergency valve on the hydraulic valve group can be communicated and operated to be kept at the right position under the action of the operating handle limiting device, the control oil way where the two electromagnetic valves are located is in a cut-off state, external emergency control oil can be rapidly fed into the hydraulic valve group through the external oil ports on the main valve group, the external emergency control oil alternately acts on the left hydraulic control port and the right hydraulic control port of the working valve, and the hydraulic valve group is enabled to achieve an emergency reversing function. Under the emergency working mode, the reversing function of the hydraulic valve group is realized by the alternative emergency control oil accessed by the external oil port. The external emergency control oil can be pressure oil which is connected into a hydraulic system of a pump truck or a manual pump in different forms.
An embodiment of a second aspect of the present invention provides a hydraulic drive system, including the hydraulic valve group of the first aspect of the embodiment; and a load which is communicated with the working valve 10 of the hydraulic valve group and can work under the action of the working valve 10.
According to the hydraulic drive system provided by the utility model, the hydraulic valve group provided by the embodiment of the first aspect is included. Therefore, the hydraulic drive system provided by the present invention has all the beneficial effects of the hydraulic valve set provided by the embodiment of the first aspect, which are not described herein again.
An embodiment of a third aspect of the utility model provides a work vehicle comprising the hydraulic valve pack of the embodiment of the first aspect described above; or the hydraulic drive system of the embodiment of the second aspect described above.
According to the utility model, the work vehicle is provided, because the work vehicle comprises the hydraulic valve group provided by the embodiment of the first aspect or the hydraulic driving system provided by the embodiment of the second aspect. Therefore, the work vehicle provided by the present invention has all the advantages of the hydraulic valve group provided by the embodiment of the first aspect or the hydraulic drive system provided by the embodiment of the second aspect, which are not described herein again.
In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. 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 of the present specification, it is to be understood that the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or unit must have a specific direction, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
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 utility model. 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 hydraulic valve block, comprising:
a working valve;
the first control valve group is connected with the working valve and used for controlling the working state of the working valve;
and the second control valve group is connected with the working valve and used for controlling the working state of the working valve when the first control valve group breaks down.
2. Hydraulic valve group according to claim 1,
the first control valve group comprises two control oil ways, each control oil way comprises a first control valve and a first oil way, and the first control valve is communicated with a hydraulic control port of the working valve through the first oil way.
3. Hydraulic valve group according to claim 2,
and an oil inlet channel and an oil return channel are arranged in the working valve, and the working valve controls the oil inlet direction and the oil return direction through the oil inlet channel and the oil return channel.
4. The hydraulic valve block of claim 2, wherein the second control valve block comprises:
the emergency valve is provided with an oil passing channel, one end of the oil passing channel is communicated with the hydraulic control port of the working valve, the emergency valve is used for supplying oil and returning oil to the hydraulic control port when the first control valve group breaks down, the first oil way is communicated or disconnected, and one end of the oil passing channel is communicated with the oil tank.
5. Hydraulic valve group according to claim 4,
the emergency valve comprises a manual reversing valve and/or an automatic reversing valve.
6. The hydraulic valve block of claim 1, wherein the second control valve block comprises:
the second control valve is internally provided with an oil passage;
and the second oil path is communicated with one end of the oil passing channel and a hydraulic control port of the working valve and is used for supplying oil and returning oil to the hydraulic control port when the first control valve group breaks down, and one end of the oil passing channel is communicated with the oil tank.
7. Hydraulic valve group according to claim 2,
and a cut-off switch is arranged on the first oil way and is used for connecting or disconnecting the first oil way.
8. Hydraulic valve group according to claim 2,
the two control oil passages also respectively comprise a third oil passage correspondingly communicated with the first control valve;
one of the two third oil passages is used for oil supply, and the other of the two third oil passages is used for oil return.
9. A hydraulic drive system, comprising: a hydraulic valve block as claimed in any one of claims 1 to 8.
10. A work vehicle comprising a hydraulic valve pack according to any one of claims 1 to 8, or a hydraulic drive system according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123233181.7U CN216447218U (en) | 2021-12-21 | 2021-12-21 | Hydraulic valve group, hydraulic drive system and working vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123233181.7U CN216447218U (en) | 2021-12-21 | 2021-12-21 | Hydraulic valve group, hydraulic drive system and working vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216447218U true CN216447218U (en) | 2022-05-06 |
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