CN203214468U - Combination valve block and hydraulic control system and excavator comprising same - Google Patents
Combination valve block and hydraulic control system and excavator comprising same Download PDFInfo
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- CN203214468U CN203214468U CN 201320194971 CN201320194971U CN203214468U CN 203214468 U CN203214468 U CN 203214468U CN 201320194971 CN201320194971 CN 201320194971 CN 201320194971 U CN201320194971 U CN 201320194971U CN 203214468 U CN203214468 U CN 203214468U
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- 239000010426 asphalt Substances 0.000 claims description 22
- 238000009530 blood pressure measurement Methods 0.000 claims description 22
- 230000009471 action Effects 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 6
- 239000000446 fuel Substances 0.000 claims description 6
- 239000003921 oil Substances 0.000 description 115
- 239000010720 hydraulic oil Substances 0.000 description 14
- 230000007246 mechanism Effects 0.000 description 12
- 238000005336 cracking Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000002828 fuel tank Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- Operation Control Of Excavators (AREA)
Abstract
The utility model provides a combination valve piece and contain hydraulic control system, excavator of this combination valve piece. The combined valve block comprises a buffer valve group, a shuttle valve, a first connecting channel communicated to a second side opposite to the first side from the first side of the combined valve block, a second connecting channel, a first comparison oil path channel and a second comparison oil path channel, wherein a first comparison end of the shuttle valve is connected to the first comparison oil path channel, a second comparison end of the shuttle valve is connected to the second comparison oil path channel, an outlet of the second comparison end of the shuttle valve extends to a shuttle valve connecting port of the combined valve block, the buffer valve group comprises a selector valve, a first one-way throttle valve and a second one-way throttle valve, the selector valve is a hydraulic control reversing valve, a first hydraulic control port of the selector valve is connected to an oil inlet end of the first connecting channel, and a second hydraulic control port of the selector valve is connected to an oil inlet end of the second connecting channel. According to the utility model discloses a combination valve piece can make combination valve piece compact structure on the basis that has multiple comprehensive functions, and occupation space is little, installs more simple and conveniently.
Description
Technical field
The utility model relates to excavator hydraulic control system field, in particular to a kind of combination valve block and comprise hydraulic control system, the excavator of this combination valve block.
Background technique
The excavator pilot system can reach the purpose of low pressure guide oil hydraulic control high-pressure work oil circuit processed, and is more laborsaving when making personnel operation, therefore can play a multiplier effect.
But when some operating mode (descending as swing arm), guide oil pressure raises suddenly, can cause greater impact, causes actuator's origination action of pilot system control too fast, cause vibration easily, generally cushion by on each control oil circuit, increasing throttle valve separately at present.
After connecting first rodding on request, excavator swing arm descends, and when dipper was carried out the discharging action, throttle valve can prevent that pilot pressure oil from jumping and directly act on main valve, the vibration that impacts, maintenance excavator stable operation.
Respectively control oil circuit but existing damping device is arranged separately in, cause assembling, inconvenient maintenance; Each control valve disperses to install, and it is bigger to take up space, and installs loaded down with trivial detailsly, and it is staggered easily that flexible pipe connects the back, seems in a jumble, attractive in appearance inadequately.
The model utility content
The utility model aims to provide a kind of combination valve block and comprises hydraulic control system, the excavator of this combination valve block, can make combination valve block have compact structure on the basis of multiple comprehensive function, and it is little to take up room, and installs more simple and convenient.
To achieve these goals, according to an aspect of the present utility model, a kind of combination valve block is provided, comprise the trimmer valve group, shuttle valve, be communicated to first connecting passage of second side relative with this first side from first side of combination valve block, second connecting passage, the first tournament oil path passage and the second tournament oil path passage, first of shuttle valve is relatively held and is connected to the first tournament oil path passage, second of shuttle valve is relatively held and is connected to the second tournament oil path passage, the outlet of shuttle valve extends to the shuttle valve connection mouth of combination valve block, the trimmer valve group comprises selector valve, be connected first one-way throttle valve on first connecting passage, and be connected second one-way throttle valve on second connecting passage, selector valve is pilot operated directional control valve, the first hydraulic control mouth of selector valve is connected the entrance point of first connecting passage, and the second hydraulic control mouth of selector valve is connected the entrance point of second connecting passage.
Further, selector valve also comprises first actuator port, second actuator port and return opening, first actuator port is connected on the asphalt channel of outlet end of first connecting passage, second actuator port is connected on the asphalt channel of outlet end of second connecting passage, and selector valve has first working position that first actuator port is communicated with return opening when the second connecting passage oil-feed and second working position that second actuator port is communicated with return opening when the first connecting passage oil-feed.
Further, selector valve is hydraulic control 3-position-3-way selector valve, and the first hydraulic control mouth of hydraulic control 3-position-3-way selector valve is connected to the entrance point of first connecting passage, and the second hydraulic control mouth of hydraulic control 3-position-3-way selector valve is connected to the entrance point of second connecting passage.
Further, combination valve block also comprises the heating asphalt channel, on the drainback passage that an end is connected to return opening is connected of heating asphalt channel.
Further, combination valve block comprises two trimmer valve groups, and the return opening of two trimmer valve groups is communicated with.
Further, combination valve block also comprises the pressure measurement piece, and the pressure measurement piece comprises first pressure tap, second pressure tap, the first pressure measurement connection mouth that is connected with first pressure tap and the second pressure measurement connection mouth that is connected with second pressure tap.
Further, shuttle valve, pressure measurement piece and trimmer valve group are removably combined.
According on the other hand of the present utility model, a kind of hydraulic control system is provided, comprise combination valve block, this combination valve block is above-mentioned combination valve block.
Further, hydraulic control system also comprises main pump, first pilot-actuated valve, second pilot-actuated valve and first pilot operated directional control valve, first connecting passage of combination valve block is connected between the first hydraulic control mouth of the first hydraulic control mouth of first pilot-actuated valve and first pilot operated directional control valve, second connecting passage is connected between the second hydraulic control mouth of the second hydraulic control mouth of second pilot-actuated valve and first pilot operated directional control valve, and main pump is the first pilot operated directional control valve fuel feeding.
Further, hydraulic control system also comprises the 3rd pilot-actuated valve, the 4th pilot-actuated valve, swirl gear selector valve and is used for the spool limited valve of the valve element position of control first pilot operated directional control valve, the first tournament oil path passage is connected between the first hydraulic control mouth of the first hydraulic control mouth of the 3rd pilot-actuated valve and swirl gear selector valve, and the second tournament oil path passage is connected between the second hydraulic control mouth of the second hydraulic control mouth of the 4th pilot-actuated valve and swirl gear selector valve; First pilot operated directional control valve (41) shares a main pump with the swirl gear selector valve, the outlet end of shuttle valve is connected to the spool limited valve, driving the spool that the spool limited valve limits first pilot operated directional control valve from the fluid of the 3rd pilot-actuated valve or the 4th pilot-actuated valve commutates to a side, when making swirl gear selector valve commutation action, main pump is swirl gear selector valve fuel feeding.
Provide a kind of excavator more on the one hand according to of the present utility model, comprised hydraulic control system, changing hydraulic control system is above-mentioned hydraulic control system.
Use the technical solution of the utility model, combination valve block comprises first connecting passage that is communicated to second side relative with this first side from first side of combination valve block, second connecting passage, the first tournament oil path passage, the second tournament oil path passage, trimmer valve group and shuttle valve, first of shuttle valve is relatively held and is connected to the first tournament oil path passage, second end of shuttle valve is connected to the second tournament oil path passage, the outlet of shuttle valve extends to the shuttle valve connection mouth of combination valve block, the trimmer valve group comprises first one-way throttle valve that is connected on first connecting passage, be connected second one-way throttle valve and selector valve on second connecting passage, the first hydraulic control mouth of selector valve is connected on first connecting passage, and the second hydraulic control mouth of selector valve is connected on second connecting passage.When combination valve block is worked, because combination valve block itself has the effect of trimmer valve and shuttle valve at least simultaneously, therefore can satisfy the various control needs of hydraulic system, comprise polytype valve in this combination valve block itself, reduced cost, make the compact structure of valve piece, volume is little, is convenient to the layout of hydraulic control system more.
Description of drawings
The accompanying drawing that constitutes a part of the present utility model is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not constitute improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the structural representation according to embodiment's of the present utility model combination valve block; And
Fig. 2 shows the structural representation according to embodiment's of the present utility model hydraulic control system.
Embodiment
Hereinafter will describe the utility model with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
In each following embodiment, all with the check valve inlet place end of first one-way throttle valve 11 entrance point as first one-way throttle valve 11, one-way valve with first one-way throttle valve 11 exports the place end as the outlet end of first one-way throttle valve 11, with the check valve inlet place end of second one-way throttle valve 12 entrance point as second one-way throttle valve 12, with the one-way valve outlet place end of second one-way throttle valve 12 outlet end as second one-way throttle valve 12.
As shown in Figure 1, according to embodiment of the present utility model, combination valve block comprises trimmer valve group 10, shuttle valve 30, is communicated to the first connecting passage AB, the second connecting passage CD, the first tournament oil path passage ac and the second tournament oil path passage bd of second side relative with this first side from first side of combination valve block, and the port of each above-mentioned passage is all for being connected with hydraulic pipe line.First of shuttle valve 30 is relatively held and is connected to the first tournament oil path passage ac, second of shuttle valve 30 is relatively held and is connected to the second tournament oil path passage bd, the outlet of shuttle valve 30 extends to the shuttle valve connection mouth of combination valve block, trimmer valve group 10 comprise first one-way throttle valve 11 that is connected on the first connecting passage AB, be connected second one-way throttle valve 12 on the second connecting passage CD and be connected the first connecting passage AB and the second connecting passage CD between selector valve 13.
Have connection mouth A at combination valve block, connection mouth B, connection mouth C, connection mouth D, and connection mouth T, combination valve block is connected by realization pipeline between above-mentioned each connection mouth and other hydraulic unit.The entrance point of first one-way throttle valve 11 is connected to the connection mouth A of the first connecting passage AB, and outlet end is connected to the connection mouth B of the first connecting passage AB.The entrance point of second one-way throttle valve 12 is connected to the connection mouth C of the second connecting passage CD, and outlet end is connected to the connection mouth D of the second connecting passage CD.The oil return inlet T 1 of selector valve 13 is connected to connection mouth T.In the present embodiment, selector valve 13 is pilot operated directional control valve, the first hydraulic control mouth of selector valve 13 is connected on the connection mouth A of the first connecting passage AB, the second hydraulic control mouth of selector valve 13 is connected on the connection mouth C of the second connecting passage CD, the oil return inlet T 1 of selector valve 13 connects drainback passage, is connected with heating asphalt channel 14 on the drainback passage.
The combination valve block of present embodiment is preferably used for being used with pilot operated directional control valve.When the pilot operated directional control valve of controlling when guide oil need be carried out the commutation action of both direction, generally be provided with the hydraulic control mouth at the two ends of pilot operated directional control valve, hydraulic system can be controlled the commutation of this pilot operated directional control valve by the mode that feeds hydraulic oil in the hydraulic control mouth.When the combination valve block of present embodiment is applied to guide's oil circuit, can control guide oil and be communicated with the first connecting passage AB or the second connecting passage CD, thus the working state of the pilot operated directional control valve that the adjustment guide oil is controlled.In the present embodiment, connection mouth B is connected with first control end of pilot operated directional control valve, and connection mouth D is connected with second control end of pilot operated directional control valve.
When the guide oil that comes from hydraulic oil source is connected with the connection mouth A of the first connecting passage AB, guide oil is logical oily to the hydraulic control mouth of the pilot operated directional control valve of required control by the throttle valve of first one-way throttle valve 11 earlier, when guide oil pressure arrives cracking pressure, guide oil promotes the one-way valve opens of first one-way throttle valve 11, make first control end of the pilot operated directional control valve that will control enter hydraulic oil, thereby the spool that promotes pilot operated directional control valve moves, meanwhile, the spool that hydraulic oil promotes selector valve 13 moves, make selector valve 13 be in second working position, this moment, the second actuator port B1 of selector valve 13 was communicated with oil return inlet T 1, and the guide oil in second control end of the selector valve that control flows back to fuel tank through the second actuator port B1.Because in the process that one-way valve is opened, fed hydraulic oil by throttle valve in first control end, one side of pilot operated directional control valve, therefore, can form buffering to guide's oil-feed of pilot operated directional control valve, prevent the pilot pressure sudden change and the pilot operated directional control valve of controlling is impacted and causes vibration.
When guide oil is connected with the connection mouth C of the second connecting passage CD, guide oil is logical oily to second control end of pilot operated directional control valve by the throttle valve of second one-way throttle valve 12 earlier, when guide oil pressure arrives cracking pressure, guide oil promotes the one-way valve opens of second one-way throttle valve 12, make the guide oil in second control end promote the spool action, meanwhile, the spool that hydraulic oil promotes selector valve 13 moves, make selector valve 13 be in first working position, this moment, the first actuator port A1 of selector valve was communicated with oil return inlet T 1, and the guide oil in first control end of pilot operated directional control valve flows back to fuel tank through the first actuator port A1.Therefore, when guide oil refluxes, all directly flow back to fuel tank by selector valve 13, and can be at first produce back pressure through throttle valve, effectively reduce the resistance of guide oil when refluxing, improved the working efficiency of hydraulic oil.
Preferably, an end of the heating asphalt channel 14 of this combination valve block inside is communicated with thermal source, and its other end is connected with oil return inlet T 1.This heating oil circuit connecting passage 14 is used under cold weather or other situation that need heat trimmer valve group 10, be connected with the heating oil circuit, deep fat is introduced in the trimmer valve group 10, oil sump tank after deep fat is flowed in trimmer valve group 10, thereby whole valve piece is heated up rapidly, make it arrive working oil temperature, excessive and trimmer valve the group 10 slow in one's movements or card valve phenomenons that cause of pressure loss when fluid is through the throttle orifice of the one-way throttle valve in the trimmer valve group 10 in the time of therefore can effectively preventing low temperature, the two ends of this heating oil circuit connecting passage 14 are communicated to connection mouth IN and the connection mouth T on the combination valve block respectively.
Preferably, in the present embodiment, selector valve 13 is hydraulic control 3-position-3-way selector valve, the first hydraulic control mouth of hydraulic control 3-position-3-way selector valve is connected on the entrance point asphalt channel of first one-way throttle valve 11, and the second hydraulic control mouth of hydraulic control 3-position-3-way selector valve is connected on the entrance point asphalt channel of second one-way throttle valve 12.This selector valve also can be the selector valve of other kind, and for example electromagnetism 3-position-3-way selector valve in such cases, then needs by controller etc. selector valve to be controlled, and makes it satisfy the needed control mode of the utility model.
Combination valve block also can comprise two trimmer valve groups 10, and the oil return inlet T 1 of these two trimmer valve groups 10 is communicated with by a connection channel, and is connected to connection mouth T jointly, and an end of heating oil circuit connecting passage 14 is communicated with on this connecting passage.So, when then trimmer valve group 10 being heated, can realize two trimmer valve groups 10 are heated simultaneously.The quantity that arranges of trimmer valve group 10 herein is not limited to two, can determine according to the selector valve quantity of required use, so that the resistance of whole hydraulic control system can reduce guide's oil return the time, thereby improves the working efficiency of hydraulic oil on the whole.
Preferably, combination valve block also comprises pressure measurement piece 20, and pressure measurement piece 20 comprises the first pressure tap Px that is connected with high-pressure oil passage to be tested respectively and the second pressure tap Py and the first pressure measurement connection mouth X that is connected with the first pressure tap Px and the second pressure measurement connection mouth Y that is connected with the second pressure tap Py.
More preferably, above-mentioned shuttle valve 30, pressure measurement piece 20 and trimmer valve group 10 are removably combined.
Because above-mentioned several valves are combined and installed together, make the compact structure of valve piece, volume is little, is convenient to the layout of hydraulic control system more.And these several valves are removably combined, then make shuttle valve, pressure measurement piece and trimmer valve group be integrated in one, its inner oil duct is separate again, when wherein a part of valve body damages, only need to change corresponding valve body, and do not need whole combination valve block is changed, therefore can reduce maintenance cost.
In conjunction with referring to shown in Figure 2, according to embodiment of the present utility model, hydraulic control system comprises combination valve block, and this combination valve block is above-mentioned combination valve block.Preferably, in the present embodiment, combination valve block comprises two trimmer valve groups 10, in combination valve block, comprise the first connecting passage AB and the second connecting passage CD that first trimmer valve group 10 matches, and the 3rd connecting passage EF that matches with second trimmer valve group 10 and the 4th connecting passage GH, the set-up mode of the 3rd connecting passage EF and the 4th connecting passage GH and effect are identical with effect with the set-up mode of the first connecting passage AB and the second connecting passage CD.
Hydraulic control system also comprises main pump, first control mechanism 40 and first pilot operated directional control valve 41, first control mechanism 40 comprises dipper control device and revolution control device, wherein the dipper control device of first control mechanism 40 comprises the first pilot-actuated valve 40a and the second pilot-actuated valve 40b, and the revolution control device comprises the 3rd pilot-actuated valve 40c and the 4th pilot-actuated valve 40d.The connection mouth A of the entrance point asphalt channel of first one-way throttle valve 11 in first trimmer valve group 10 of the first pilot-actuated valve 40a and combination valve block is connected, the second pilot-actuated valve 40b is connected with the connection mouth C of the entrance point asphalt channel of second one-way throttle valve 12, the first hydraulic control mouth of first pilot operated directional control valve 41 is connected with the connection mouth B of the outlet end asphalt channel of first one-way throttle valve 11, the second hydraulic control mouth of first pilot operated directional control valve 41 is connected with the connection mouth D of the outlet end asphalt channel of second one-way throttle valve 12, and main pump is used to first pilot operated directional control valve, 41 fuel feeding.Wherein two actuator ports of first pilot operated directional control valve 41 are communicated with rod chamber and the rodless cavity of bucket arm cylinder 43 respectively.
This hydraulic control system also comprises swirl gear selector valve 44, the 3rd pilot-actuated valve 40c of the revolution control device of first control mechanism 40 is connected with the connection mouth a of first end of the first tournament oil path passage ac, the 4th pilot-actuated valve 40d is connected with the connection mouth b of first end of the second tournament oil path passage bd, second end of the first tournament oil path passage ac and the second tournament oil path passage bd is connected to the hydraulic control mouth at swirl gear selector valve 44 two ends respectively, can control the valve element position of swirl gear selector valve 44 according to the hydraulic fluid pressure size in the first tournament oil path passage ac and the second tournament oil path passage bd.Shuttle valve 30 is the first tournament oil path passage ac and the interior hydraulic fluid pressure of the second tournament oil path passage bd relatively, and the hydraulic oil that pressure is higher is through the outlet end output of shuttle valve 30.The connection mouth e of the outlet end asphalt channel of shuttle valve 30 is connected to spool limited valve 42, this spool limited valve 42 is connected in a side of first pilot operated directional control valve 41, can control the control end extrusion of spool limited valve according to the pressure size that comes from the hydraulic oil in the first tournament oil path passage ac or the second tournament oil path passage bd, controlling the valve element position of first pilot operated directional control valve 41, and then reach the purpose of the actuator port openings of sizes of control first pilot operated directional control valve 41.The spool that drives spool limited valve 42 restrictions first pilot operated directional control valve 41 from the high-voltage oil liquid of the 3rd pilot-actuated valve 40c or the 4th pilot-actuated valve 40d commutates to a side, when making the 44 commutation actions of swirl gear selector valve, main pump is mainly swirl gear selector valve 44 fuel feeding.
In order further to expand function of the present utility model, hydraulic control system can also comprise second control mechanism 50 and second pilot operated directional control valve 51, second control mechanism 50 comprises scraper bowl control device and swing arm control device, the swing arm control device comprises that the 5th pilot-actuated valve 50a and the 6th pilot-actuated valve 50b all control by 10 pairs of second pilot operated directional control valves 51 of second trimmer valve group in the combination valve block for the 5th pilot-actuated valve 50a and the 6th pilot-actuated valve 50b of 51 commutations of control second pilot operated directional control valve.The 5th pilot-actuated valve 50a is connected with the connection mouth E of the entrance point asphalt channel of first one-way throttle valve 11, the 6th pilot-actuated valve 50b is connected with the connection mouth G of the entrance point asphalt channel of second one-way throttle valve 12, the first hydraulic control mouth of second pilot operated directional control valve 51 is connected with the connection mouth F of the outlet end asphalt channel of first one-way throttle valve 11, and the second hydraulic control mouth of second pilot operated directional control valve 51 is connected with the connection mouth H of the outlet end asphalt channel of second one-way throttle valve 12.Wherein two actuator ports of second pilot operated directional control valve 51 are communicated with rod chamber and the rodless cavity of boom cylinder 52 respectively.
The first pressure measurement connection mouth X of the pressure measurement piece of combination valve block is connected to first pressure switch 61, the second pressure measurement connection mouth Y is connected to second pressure switch 62, the first pressure tap Px is connected to the first pressure measurement connection mouth X by first inner passage, the second pressure tap Py is connected to the second pressure measurement connection mouth Y by second inner passage, and first inner passage is not communicated with mutually with second inner passage.The first pressure tap Px and the second pressure tap Py all are connected to other high-pressure oil passages, when getting on the bus or getting off action, the pressure at the first pressure tap Px of pressure measurement piece or the second pressure tap Py place raises, control corresponding pressure switch closure, automatical control system obtains signal, the automatical control system of this hydraulic system can be controlled other equipments according to this signal, carries out corresponding control action.
Working procedure to hydraulic control system is illustrated below.
When second control mechanism 50 rises by the 5th pilot-actuated valve 50a control swing arm, pilot pressure oil enters the connection mouth E of combination valve block through oil sources P, the 5th pilot-actuated valve 50a, and act on the first hydraulic control mouth of the hydraulic control 3-position-3-way selector valve of second trimmer valve group 10, the spool that promotes the hydraulic control 3-position-3-way selector valve in this trimmer valve group 10 moves to left, and the right position of hydraulic control 3-position-3-way selector valve is connected.Hydraulic oil acts on second pilot operated directional control valve 51 by first one-way throttle valve 11 of second trimmer valve group 10 simultaneously, when guide oil pressure reaches the predetermined cracking pressure value (this force value for example is 10bar) of the one-way valve of this first one-way throttle valve 11, guide oil is opened the one-way valve of this first one-way throttle valve 11 and is acted on the hydraulic control mouth of second pilot operated directional control valve 51, the spool that promotes second pilot operated directional control valve 51 moves to right, the position, a left side of second pilot operated directional control valve 51 is connected, working connection pressure oil enters the big chamber of rodless cavity of boom cylinder 52, swing arm stretches out, reach swing arm and promote purpose, the right position guide oil of second pilot operated directional control valve 51 is by the right position oil sump tank of the hydraulic control 3-position-3-way selector valve of second trimmer valve group 10.
When second control mechanism, 50 control swing arms descend, pilot pressure oil enters the connection mouth G of combination valve block through oil sources P, the 6th pilot-actuated valve 50b, act on the second hydraulic control mouth of the hydraulic control 3-position-3-way selector valve of second trimmer valve group 10, the spool that promotes the hydraulic control 3-position-3-way selector valve in this trimmer valve group 10 moves to right, and the position, a left side of hydraulic control 3-position-3-way selector valve is connected.Hydraulic oil acts on second pilot operated directional control valve 51 by the throttle valve of second one-way throttle valve 12 of second trimmer valve group 10 simultaneously, when guide oil pressure reaches the predetermined cracking pressure value (this force value for example is 10bar) of the one-way valve of this second one-way throttle valve 12, the one-way valve that guide oil promotes this second one-way throttle valve 12 again acts on second pilot operated directional control valve 51, the spool that promotes second pilot operated directional control valve 51 moves to left, the right position of second pilot operated directional control valve 51 is connected, working connection pressure oil enters the rod chamber loculus of boom cylinder 52, swing arm shrinks, reach the purpose that swing arm descends, second pilot operated directional control valve, 51 left side guide oil are by position, the left side oil sump tank of the hydraulic control 3-position-3-way selector valve of second trimmer valve group 10.
When first control mechanism 40 reclaims by second pilot-actuated valve 40b control dipper, pilot pressure oil enters the connection mouth A of combination valve block through oil sources P, the first pilot-actuated valve 40a, act on the first hydraulic control mouth of first trimmer valve group 10, the spool that promotes the hydraulic control 3-position-3-way selector valve in this trimmer valve group 10 moves to left, and the right position of hydraulic control 3-position-3-way selector valve is connected.Hydraulic oil acts on the first hydraulic control mouth of first pilot operated directional control valve 41 by first one-way throttle valve 11 of first trimmer valve group 10 simultaneously, when guide oil pressure reaches the predetermined cracking pressure value of one-way valve (this force value for example is 10bar) of this first one-way throttle valve 11, guide oil is opened the one-way valve of this first one-way throttle valve 11 and is acted on first pilot operated directional control valve 41, the spool that promotes first pilot operated directional control valve 41 moves to left, the right position of first pilot operated directional control valve 41 is connected, working connection pressure oil enters the big chamber of rodless cavity of bucket arm cylinder 43, the piston rod of bucket arm cylinder 43 stretches out, the drive dipper reclaims, reach the purpose that dipper excavates, position, the left side guide oil of first pilot operated directional control valve 41 is by the right position oil sump tank of the hydraulic control 3-position-3-way selector valve of first trimmer valve group 10.
When first control mechanism 40 stretches out by second pilot-actuated valve 40b control dipper, pilot pressure oil enters the connection mouth C of combination valve block, act on the second hydraulic control mouth of first trimmer valve group 10, the spool that promotes the hydraulic control 3-position-3-way selector valve in this trimmer valve group 10 moves to right, and the position, a left side of hydraulic control 3-position-3-way selector valve is connected.Hydraulic oil acts on first pilot operated directional control valve 41 by second one-way throttle valve 12 of first trimmer valve group 10 simultaneously, when guide oil pressure reaches the predetermined cracking pressure value of one-way valve (this force value for example is 10bar) of this second one-way throttle valve 12, guide oil is opened the one-way valve of this second one-way throttle valve 12 and is acted on the second hydraulic control mouth of first pilot operated directional control valve 41, the spool that promotes first pilot operated directional control valve 41 moves to right, the position, a left side of first pilot operated directional control valve 41 is connected, working connection pressure oil enters the rod chamber loculus of bucket arm cylinder 43, the piston rod retraction of bucket arm cylinder 43, the drive dipper stretches out, reach the purpose of dipper discharging, first pilot operated directional control valve, 41 a right guide oil are by position, the left side oil sump tank of the hydraulic control 3-position-3-way selector valve of first trimmer valve group 10.
When swing arm and dipper action, guide oil acts on the spool of main valve (selector valve of control such as first pilot operated directional control valve 41 and second pilot operated directional control valve 51 actuator action) through throttle valve earlier, has effectively prevented from causing main valve plug to open suddenly owing to hydraulic fluid pressure raises suddenly.When leading the predetermined cracking pressure value that pressure oil reaches one-way valve in the ban, guide oil is pushed one-way valve again open and is acted on the main valve plug, increases pilot pressure, guarantees that main valve plug is pushed.Whole process guide oil pressure steadily rises, and makes main valve plug steadily mobile, has prevented that flow from increasing suddenly, has avoided impacting and has caused car load to shake.
When first control mechanism 40 is controlled swirl gear to right-hand rotation by the 3rd pilot-actuated valve 40c, pilot pressure oil enters the connection mouth a of combination valve block, act on the first hydraulic control mouth of swirl gear selector valve 44, the spool that promotes swirl gear selector valve 44 moves to right, the high-voltage oil liquid of main pump enters the rotary motor (not shown) by swirl gear selector valve 44, reach motor right-hand rotation purpose, simultaneously the connection mouth e of pilot pressure oil by shuttle valve 30 outlet end acts on the spool limited valve 42 on first pilot operated directional control valve 41, standard-sized sheet when making spool limited valve 42 stop first pilot operated directional control valve 41 to be positioned at position, a left side, reduce to offer the oil mass of bucket arm cylinder 43, guarantee the most of supply of the pressure oil rotary motor of main pump, make rotary motor obtain enough flows, have precedence over the purpose that dipper reclaims thereby reach the motor right-hand rotation.
When first control mechanism 40 turns round left by the 4th pilot-actuated valve 40d control swirl gear, pilot pressure oil enters the connection mouth b of combination valve block, act on the second hydraulic control mouth of swirl gear selector valve 44, the spool that promotes swirl gear selector valve 44 moves to left, reach left side revolution purpose, simultaneously the connection mouth e of pilot pressure oil by shuttle valve 30 outlet end acts on the spool limited valve 42 on first pilot operated directional control valve 41, spool standard-sized sheet when making spool limited valve 42 stop first pilot operated directional control valve 41 to be positioned at position, a left side, reduce to offer the oil mass of bucket arm cylinder 43, guarantee that rotary motor obtains enough flows, reach left side revolution and have precedence over the moving purpose that reclaims of dipper.Spool limited valve 42 in the process of work, a spool that only is used for control first pilot operated directional control valve 41 position that moves to left, and the spool that does not limit first pilot operated directional control valve 41 position that moves to right.
When getting on the bus or having got off action, the pressure of the first pressure tap Px, the second pressure tap Py raises, this moment combination valve block the pressure switch closure at corresponding connection mouth place, automatical control system obtains signal, control actuator carries out action.
When machine just starts, be in the hot car stage, elder generation's deep fat enters in the combination valve block by the heating oil circuit connecting passage 14 on the combination valve block, oil sump tank after deep fat flows in combination valve block, thereby whole valve piece is heated up rapidly, reach working oil temperature, when having prevented low temperature, guide oil is excessive and cause phenomenon slow in one's movements or the card valve through the throttle orifice pressure loss.
According to embodiment of the present utility model, excavator comprises hydraulic control system, and this hydraulic control system is above-mentioned hydraulic control system.
From above description, as can be seen, the utility model the above embodiments have realized following technique effect: combination valve block comprises first connecting passage that is communicated to second side relative with this first side from first side of combination valve block, second connecting passage, the first tournament oil path passage, the second tournament oil path passage, trimmer valve group and shuttle valve, first of shuttle valve is relatively held and is connected to the first tournament oil path passage, second of shuttle valve is relatively held and is connected to the second tournament oil path passage, the outlet of shuttle valve extends to the shuttle valve connection mouth of combination valve block, the trimmer valve group comprises selector valve, be connected first one-way throttle valve on first connecting passage, and be connected second one-way throttle valve on second connecting passage, the first hydraulic control mouth of selector valve is connected on first connecting passage, the second hydraulic control mouth of selector valve is connected on second connecting passage, the return opening of selector valve is connected with drainback passage, is connected with the heating asphalt channel on the drainback passage.When combination valve block is worked, because combination valve block itself has the effect of trimmer valve and shuttle valve at least simultaneously, therefore can satisfy the various control needs of hydraulic system, comprise polytype valve in this combination valve block itself, make the compact structure of valve piece, volume is little, is convenient to the layout of hydraulic control system more.
Be preferred embodiment of the present utility model only below, be not limited to the utility model, for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (11)
1. combination valve block, it is characterized in that, comprise trimmer valve group (10), shuttle valve (30), be communicated to first connecting passage of second side relative with this first side from first side of described combination valve block, second connecting passage, the first tournament oil path passage and the second tournament oil path passage, first of described shuttle valve (30) is relatively held and is connected to the described first tournament oil path passage, second of described shuttle valve (30) is relatively held and is connected to the described second tournament oil path passage, the outlet of described shuttle valve (30) extends to the shuttle valve connection mouth of described combination valve block, described trimmer valve group (10) comprises selector valve (13), be connected first one-way throttle valve (11) on described first connecting passage, and be connected second one-way throttle valve (12) on described second connecting passage, described selector valve is pilot operated directional control valve, the first hydraulic control mouth of described selector valve (13) is connected the entrance point of described first connecting passage, and the second hydraulic control mouth of described selector valve (13) is connected the entrance point of described second connecting passage.
2. combination valve block according to claim 1, it is characterized in that, described selector valve (13) also comprises first actuator port, second actuator port and return opening, described first actuator port is connected on the asphalt channel of outlet end of described first connecting passage, described second actuator port is connected on the asphalt channel of outlet end of described second connecting passage, and described selector valve (13) has described first actuator port is communicated with described return opening when the described second connecting passage oil-feed first working position and described second actuator port is communicated with described return opening when the described first connecting passage oil-feed second working position.
3. combination valve block according to claim 1, it is characterized in that, described selector valve (13) is hydraulic control 3-position-3-way selector valve, the first hydraulic control mouth of described hydraulic control 3-position-3-way selector valve is connected to the entrance point of described first connecting passage, and the second hydraulic control mouth of described hydraulic control 3-position-3-way selector valve is connected to the entrance point of described second connecting passage.
4. combination valve block according to claim 2 is characterized in that, described combination valve block also comprises heating asphalt channel (14), and an end of described heating asphalt channel (14) is connected on the drainback passage that is connected with described return opening.
5. combination valve block according to claim 4 is characterized in that, described combination valve block comprises two described trimmer valve groups (10), and the described return opening of two described trimmer valve groups (10) is communicated with.
6. combination valve block according to claim 1, it is characterized in that, described combination valve block also comprises pressure measurement piece (20), and described pressure measurement piece (20) comprises first pressure tap, second pressure tap, the first pressure measurement connection mouth that is connected with described first pressure tap and the second pressure measurement connection mouth that is connected with described second pressure tap.
7. combination valve block according to claim 6 is characterized in that, described shuttle valve (30), described pressure measurement piece (20) and described trimmer valve group (10) are removably combined.
8. a hydraulic control system comprises combination valve block, it is characterized in that, described combination valve block is each described combination valve block in the claim 1 to 7.
9. hydraulic control system according to claim 8, it is characterized in that, described hydraulic control system also comprises main pump, first pilot-actuated valve (40a), second pilot-actuated valve (40b) and first pilot operated directional control valve (41), first connecting passage of described combination valve block is connected between the first hydraulic control mouth of the first hydraulic control mouth of described first pilot-actuated valve (40a) and described first pilot operated directional control valve (41), described second connecting passage is connected between the second hydraulic control mouth of the second hydraulic control mouth of described second pilot-actuated valve (40b) and described first pilot operated directional control valve (41), and described main pump is first pilot operated directional control valve (41) fuel feeding.
10. hydraulic control system according to claim 8, it is characterized in that, described hydraulic control system also comprises the 3rd pilot-actuated valve (40c), the 4th pilot-actuated valve (40d), swirl gear selector valve (44) and be used for the spool limited valve (42) of the valve element position of described first pilot operated directional control valve of control (41), the described first tournament oil path passage is connected between the first hydraulic control mouth of the first hydraulic control mouth of described the 3rd pilot-actuated valve (40c) and described swirl gear selector valve (44), and the described second tournament oil path passage is connected between the second hydraulic control mouth of the second hydraulic control mouth of described the 4th pilot-actuated valve (40d) and described swirl gear selector valve (44); Described first pilot operated directional control valve (41) shares a main pump with described swirl gear selector valve (44), the outlet end of described shuttle valve (30) is connected to described spool limited valve (42), the spool that drives described spool limited valve (42) described first pilot operated directional control valve of restriction (41) from the fluid of described the 3rd pilot-actuated valve (40c) or the 4th pilot-actuated valve (40d) commutates to a side, when making described swirl gear selector valve (44) commutation action, described main pump is described swirl gear selector valve (44) fuel feeding.
11. an excavator comprises hydraulic control system, it is characterized in that, described hydraulic control system is each described hydraulic control system in the claim 8 to 10.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320194971 CN203214468U (en) | 2013-04-16 | 2013-04-16 | Combination valve block and hydraulic control system and excavator comprising same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320194971 CN203214468U (en) | 2013-04-16 | 2013-04-16 | Combination valve block and hydraulic control system and excavator comprising same |
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| CN203214468U true CN203214468U (en) | 2013-09-25 |
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| CN 201320194971 Expired - Lifetime CN203214468U (en) | 2013-04-16 | 2013-04-16 | Combination valve block and hydraulic control system and excavator comprising same |
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| CN (1) | CN203214468U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234103A (en) * | 2014-03-07 | 2014-12-24 | 贵州詹阳动力重工有限公司 | Hydraulic excavator movable arm priority hydraulic oil way and system vibration damping hydraulic loop |
| CN107288958A (en) * | 2017-08-22 | 2017-10-24 | 徐州徐工挖掘机械有限公司 | A kind of hydraulic crawler excavator guide hydraulic pressure pre-heating system and pre-heating mean |
| CN110486345A (en) * | 2019-08-20 | 2019-11-22 | 江苏柳工机械有限公司 | Combined hydraulic valve |
| CN110939619A (en) * | 2019-12-27 | 2020-03-31 | 恒天九五重工有限公司 | Pile machine power head hydraulic system based on excavator multi-way valve |
| CN111886415A (en) * | 2018-03-05 | 2020-11-03 | 奥卡普有限公司 | Hydraulic distributor |
-
2013
- 2013-04-16 CN CN 201320194971 patent/CN203214468U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104234103A (en) * | 2014-03-07 | 2014-12-24 | 贵州詹阳动力重工有限公司 | Hydraulic excavator movable arm priority hydraulic oil way and system vibration damping hydraulic loop |
| CN104234103B (en) * | 2014-03-07 | 2017-02-01 | 贵州詹阳动力重工有限公司 | Hydraulic excavator movable arm priority hydraulic oil way and system vibration damping hydraulic loop |
| CN107288958A (en) * | 2017-08-22 | 2017-10-24 | 徐州徐工挖掘机械有限公司 | A kind of hydraulic crawler excavator guide hydraulic pressure pre-heating system and pre-heating mean |
| CN111886415A (en) * | 2018-03-05 | 2020-11-03 | 奥卡普有限公司 | Hydraulic distributor |
| CN111886415B (en) * | 2018-03-05 | 2023-11-07 | 奥卡普有限公司 | Hydraulic distributor |
| CN110486345A (en) * | 2019-08-20 | 2019-11-22 | 江苏柳工机械有限公司 | Combined hydraulic valve |
| CN110939619A (en) * | 2019-12-27 | 2020-03-31 | 恒天九五重工有限公司 | Pile machine power head hydraulic system based on excavator multi-way valve |
| CN110939619B (en) * | 2019-12-27 | 2024-05-03 | 恒天九五重工有限公司 | Pile machine power head hydraulic system based on digger multi-way valve |
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| C14 | Grant of patent or utility model | ||
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