CN207470512U - The pressure repairing multi-way valve that a kind of band action judges - Google Patents

Abstract

The utility model provides the pressure repairing multi-way valve that a kind of band action judges, belongs to technical field of hydraulic pressure.It solves the problems, such as to cause stress loss during existing multi-way valve repairing.This multi-way valve includes valve body, commutation valve chamber and commutation valve rod, return oil pressure valve is set on the drainback passage one that oil-recovery tank is connected with oil return opening, Fill valve is set between oil-recovery tank and work oil groove one, there is reversal valve intracavitary oil return to control oil groove, oil return control valve is provided on the drainback passage two that oil-recovery tank is connected with oil return opening, when work oil groove one is connected with oil-feed tank, oil return control oil groove is connected with oil-recovery tank closes oil return control valve, the pressure of return oil pressure valve is overcome to connect oil return opening oil return by drainback passage one after the oil pressure raising in oil-recovery tank；When work oil groove one is connected with oil-recovery tank, oil return control oil groove opens oil return control valve with oil-recovery tank disconnection, and oil-recovery tank directly connects oil return opening oil return by drainback passage two.This multi-way valve reduces the pressure loss caused by setting counterbalance valve repairing.

Description

The pressure repairing multi-way valve that a kind of band action judges

Technical field

The utility model belongs to technical field of hydraulic pressure, is related to the pressure repairing multi-way valve that a kind of band action judges.

Background technology

Multi-way valve is a kind of common hydraulic control valve, is commonly used for control machinery movement and the action of executing agency.It should Cover farm machinery with range, for example, harvester, seeder etc.；Engineering machinery, for example, excavator, loading machine etc..In machinery When movement, particularly executing agency act, since executing agency's movement velocity is too fast, it is easy to cause working oil chamber hydraulic oil not Foot, leads to emptying phenomenon, causes cavitation so that hydraulic oil is easier stabilization that is rotten, and influencing executing agency's movement Property increases noise.

In order to reduce emptying phenomenon, in some multi-way valves, add and force repairing structure.For example, Chinese patent【Application number 201610928399.9；Application publication number CN 106351905A】Disclosed a kind of new type multipath reversal valve, including valve body, rotating bucket Connection, swing arm connection, unloading valve block etc..Rotating bucket connection leads to O-shaped slide valve function for three nine；Swing arm connection is four nine logical Q types slide valve functions； Two oil inlets are set on valve, it can be achieved that swing arm connection, rotating bucket connection work independently or both and to work at the same time；Double work mouth is set, just It installs and connects in pipeline；There is provided return oil pressure valve, it can be achieved that the back pressure of working hole A1, A2 oil return generation is to working hole B1, B2 Pressure repairing is carried out, and the first overload oil compensating valve is equipped on the first working hole of rotating bucket connection, second is set on the second working hole Overload oil compensating valve prevents from being emptied.

In another example the Chinese patent that the applicant once applied【Application number 201420359858.2；Authorization Notice No. CN204003710U】, a kind of load sensing multi-way valve for variable system, it includes valve body, oil inlet is set gradually in valve body Valve block, descending valve plate tilt valve block, accessory valve block and oil return valve block, be equipped in oil inlet valve block priority spool, overload overflow valve and DLS overflow valves；Oil return valve block is equipped with throttle valve and CF overload valves；It is set respectively in descending valve plate, inclination valve block and accessory valve block Valve rod, compensating spool, the second check valve, overload oil compensating valve, valve body is interior to be equipped with hydraulic fluid port and oil duct.

Above-mentioned multi-way valve is by setting counterbalance valve and Fill valve, will be in back oil road when working oil chamber is emptied Fluid introduces work oil ducts, carries out repairing to working oil chamber, avoids the emptying phenomenon in working oil chamber.But simple setting Counterbalance valve is resulted under the working environment for not needing to repairing, and counterbalance valve still can work to oil return circuit, cause stress damage It loses, is unfavorable for energy saving.

Invention content

The purpose of this utility model is in view of the above-mentioned problems existing in the prior art, it is proposed that a kind of band action judges strong How the technical issues of repairing multi-way valve processed, the utility model solves is so that multi-way valve can be to working oil under specific action Chamber carries out sufficient repairing, and oil return will not be impacted in normal work.

The purpose of this utility model can be realized by following technical proposal：The pressure repairing multichannel that a kind of band action judges Valve, commutation valve chamber including valve body, in valve body and commutation valve rod have oil inlet and oil return opening on the valve body, described The valve chamber that commutates has oil-feed tank, oil-recovery tank, work oil groove one and work oil groove two, the oil return that the oil-recovery tank is connected with oil return opening Return oil pressure valve is provided on channel one, is provided with Fill valve between the oil-recovery tank and work oil groove one, which is characterized in that institute Stating reversal valve intracavitary, also there is oil return to control oil groove, and oil return is provided on the drainback passage two that the oil-recovery tank is connected with oil return opening Control valve, when the work oil groove one is connected with oil-feed tank, oil return control oil groove is connected with oil-recovery tank closes oil return control valve, The pressure of return oil pressure valve is overcome to connect oil return opening oil return by drainback passage one after oil pressure raising in oil-recovery tank；The work When oil groove one is connected with oil-recovery tank, oil return control oil groove opens oil return control valve with oil-recovery tank disconnection, and oil-recovery tank directly passes through Drainback passage two connects oil return opening oil return.

The pressure repairing multi-way valve that the action of this band judges works as working oil by the way that oil return control valve and oil return is set to control oil groove During one oil inlet of slot, oil return control valve is closed so that oil-recovery tank can only overcome the pressure of return oil pressure valve to return by drainback passage one Oil so that the oil pressure raising in oil-recovery tank；In work oil groove one during hydraulic pressure shortage of oil, Fill valve is opened, by the liquid in oil-recovery tank Pressure oil is filled into work oil groove one, avoids causing to be emptied.When work one oil return of oil groove when, oil return control valve is opened, in oil-recovery tank Directly by two oil return of drainback passage, reduce the pressure loss during oil return.The pressure repairing multichannel that the action of this band judges Valve controls the opening and closing of oil return control valve by the feedback under different action states so that energy during work one oil inlet of oil groove Enough by oil-recovery tank carry out repairing prevent from being emptied, work one oil return of oil groove when can keep relatively low return pressure again, reduce back Energy loss caused by oil.

In the pressure repairing multi-way valve judged in above-mentioned band action, the oil return control valve includes oil return and controls valve chamber, The oil return control valve intracavitary is provided with oil return control spool and oil return control spring, and one end of the oil return control spool is being returned Drainback passage two, the other end connection oil return control oil of the oil return control spool are blocked under the spring-force driven dual of oil control spring Slot.When oil return control oil groove is connected with oil-recovery tank, the both ends oil pressure of oil return control spool is equal, and oil return control spool blocks back Oily channel two；When oil return control oil groove is not connected with oil-recovery tank, since the spring force of oil return control spring is smaller, in oil-recovery tank Hydraulic oil easily open-top oil return control spool and two oil return of drainback passage, the pressure loss very little of oil return can be passed through.

In the pressure repairing multi-way valve judged in above-mentioned band action, the oil return control spool blocks oil-recovery tank and oil return One end of mouth has the oil-through-hole one through oil return control spool side.By setting oil-through-hole one that can improve drainback passage two Logical oil mass so that the oil return of drainback passage two is more smooth, reduce the pressure loss.

In the pressure repairing multi-way valve judged in above-mentioned band action, there is axially disposed length in the commutation valve rod Oilhole, the peripheral surface of the commutation valve rod have an oil guiding hole one and oil guiding hole two for connecting long oilhole, the commutation valve rod along When commutation valve chamber slip makes the work oil groove one be connected with oil-feed tank, the oil guiding hole one and oil return control opposite same of oil groove positions When oil guiding hole two it is opposite with oil return groove location, make oil return control oil groove connection oil-recovery tank.By processing long oil in commutation valve rod Hole, oil guiding hole one and oil guiding hole two, can according to position control oil-recovery tank and oil return the control oil groove of commutation valve rod connect and It disconnects, realizes feedback of the commutation valve rod operating position switching to oil return control valve.

In the pressure repairing multi-way valve judged in above-mentioned band action, the reversal valve intracavitary had oily oil groove, described There is the oil duct one connected with excessively oily oil groove, one He of oil duct can be connected when commutating valve stem slides by having in the valve body in valve body The oil duct two of work oil groove one, the valve body is interior to have the oil that oil duct one and the oil groove two that works can be connected when commutating valve stem slides Road three.By commutate valve rod along commutation valve chamber slide, enable to oil duct one connect oil duct two, work at this time oil groove one into Oil；Commutation valve rod to another direction along when sliding, and oil duct one connects oil duct three, then work two oil inlet of oil groove.

In the pressure repairing multi-way valve judged in above-mentioned band action, have on the commutation valve rod and corresponded to oily oil groove Throttle notch, and the commutation valve stem slides make oil duct one and work oil groove one when connecting, and the oil-feed tank is by commutating on valve rod Throttling notch connection oil duct one.Repairing is carried out from the enough hydraulic oil of oil-recovery tank since work oil groove one has at work, By setting throttle structure in the oil inlet position of work oil groove one, it is not using full flow in oil inlet, variable pump can be reduced Power, it is more energy saving.

In the pressure repairing multi-way valve judged in above-mentioned band action, be respectively arranged in the oil duct two and oil duct three into Oily check valve.By the way that in line check valve is set to prevent oil duct two and the hydraulic oil of oil duct three from flowing back.

Also have in the pressure repairing multi-way valve judged in above-mentioned band action, in the oil duct one by feed back oil circuit with The feedback oil groove of hydraulic fluid port connection is fed back, the pressure-compensated valve that can be connected oil duct one and feed back oil groove is provided in the oil duct one. Oil inlet oil circuit and feedback oil circuit are connected by pressure-compensated valve.

In the pressure repairing multi-way valve judged in above-mentioned band action, be provided on the feedback oil circuit feedback overflow valve and Feedback throttle valve.Overflow valve is fed back by setting and feedback throttle valve protection feeds back oil circuit.

In the pressure repairing multi-way valve judged in above-mentioned band action, actuator port one and work are additionally provided on the valve body Make hydraulic fluid port two, the work oil groove one is connected by working oil path one with actuator port one；The Fill valve includes valve seat and benefit Fuel tap core, the interior intercommunicating pore with connection working oil path one and oil-recovery tank of the valve body, the front end of the valve seat is embedded above-mentioned In the intercommunicating pore and front end of valve seat has oil-through hole, and the valve seat is threaded on valve body, has on the valve seat and connected The repairing hole of oilhole and oil-recovery tank, the oil recharging valve core are slidably connected in valve seat, and described oil recharging valve core one end, which has, is located at valve The closure part of seat front end surface, the other end is provided with spring base, repairing spring is provided between the spring base and valve seat, described Oil recharging valve core has the movement tendency towards valve seat rear end under the spring-force driven dual of repairing spring and blocks the mistake of valve seat front end Oilhole, the valve seat rear end have the oil-through-hole two of connection oil-recovery tank, and valve seat rear end end has also been connected through a screw thread spiral shell It is stifled.When the hydraulic pressure shortage of oil in the oil groove one that works, since the pressure in oil-recovery tank is much larger than the Opening pressure of Fill valve so that Oil recharging valve core overcomes the spring force of repairing spring to be displaced outwardly so that and the closure part of oil recharging valve core outer end is detached from valve seat front end, And then make the oil-through hole of valve seat front end completely open-minded, when enabling to the Fill valve to open by the structure of this reversed check valve Circulation bigger ensure that enough hydraulic oil can enter work oil groove one and carry out repairing.

In the pressure repairing multi-way valve judged in above-mentioned band action, it is provided on the outer wall of the valve seat front end with connecting The sealing ring one that hole inner wall is close to is provided with the junction of sealing ring two, the screw plug and valve seat between the valve seat and valve body It is provided with sealing ring three.Ensure the leakproofness that Fill valve is mounted on valve body.

In the pressure repairing multi-way valve judged in above-mentioned band action, the work oil groove two-way crosses working oil path two and work Make hydraulic fluid port two to connect, overload valve is connected separately in the working oil path one and working oil path two.Valve protection is overloaded by setting Working oil path one and working oil path two.

In the pressure repairing multi-way valve judged in above-mentioned band action, the quantity of the actuator port one and actuator port two It is two groups.Such structure causes multi-way valve crushing smaller under big flow.

Compared with prior art, the advantages of pressure repairing multi-way valve that the action of this band judges, is：

1st, the pressure repairing multi-way valve setting oil return that the action of this band judges controls oil groove and oil return control valve, passes through oil return control The opening and closing of the feedback control oil return control valve of liquefaction slot so that can be carried out during work one oil inlet of oil groove by oil-recovery tank Repairing prevents from being emptied, work one oil return of oil groove when can keep relatively low return pressure again, reduce energy loss caused by oil return.

What the 2nd, the action of this band judged forces improvement of the repairing multi-way valve to oil return control valve arrangement, reduces oil return control valve Return pressure increases recirculating oil quantity, so as to reduce the pressure loss of oil return, plays energy-saving effect.

3rd, the pressure repairing multi-way valve that the action of this band judges on the in-line with repairing structure by setting throttle butterfly Structure can reduce the power of pump, further improve energy-saving effect.

Description of the drawings

Fig. 1 is hydraulic schematic diagram when forcing repairing multi-way valve applied to loading machine that the action of this band judges.

Fig. 2 is structure diagram when forcing repairing multi-way valve applied to loading machine that the action of this band judges.

Fig. 3 is the schematic cross-sectional view in A-A directions in Fig. 2.

Fig. 4 is the layout enlarged drawing at C in Fig. 3.

Fig. 5 is state diagram when annular valve rod is located at right position in Fig. 3.

Fig. 6 is state diagram when annular valve rod is located at left position in Fig. 3.

Fig. 7 is the schematic cross-sectional view in B-B directions in Fig. 2.

Fig. 8 is that the pressure repairing multi-way valve that the action of this band judges joins the hydraulic schematic diagram under use state in single control.

In figure, 1, valve body；1a, drainback passage one；1b, drainback passage two；1c, oil duct one；1c1, feedback oil groove；1e, oil Road two；1f, oil duct three；1g, working oil path one；1h, intercommunicating pore；1i, working oil path two；2nd, commutate valve chamber；2a, oil-feed tank； 2b, oil-recovery tank；2c, work oil groove one；2d, oil return control oil groove；2e, work oil groove two；2f, excessively oily oil groove；3rd, commutate valve rod； 3a, long oilhole；3b, oil guiding hole one；3c, oil guiding hole two；3d, throttling notch；4th, return oil pressure valve；5th, Fill valve；5a, valve seat； 5a1, oil-through hole；5a2, oil-through-hole two；5b, repairing hole；5c, oil recharging valve core；5c1, closure part；5d, spring base；5e, repairing bullet Spring；5f, screw plug；5g, sealing ring one；5h, sealing ring two；5i, sealing ring three；5j, clamp spring；6th, oil return control valve；6a, oil return control Valve chamber processed；6b, oil return control spool；6b1, oil-through-hole one；6c, oil return control spring；7th, in line check valve；8th, pressure compensation Valve；9th, overflow valve is fed back；10th, feedback throttle valve；11st, overload valve；12nd, rotating bucket joins；13rd, swing arm joins；P, oil inlet；T, oil return Mouthful；LS, feedback hydraulic fluid port；B, actuator port one；A, actuator port two.

Specific embodiment

It is specific embodiment of the utility model and with reference to attached drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these embodiments.

The pressure repairing multi-way valve that the action of this band judges includes valve body 1, commutation valve chamber 2, commutation valve rod 3, return oil pressure valve 4th, Fill valve 5, oil return control oil groove 2d and oil return control valve 6.

To be applied to the concrete structure that the example of loading machine introduces this pressure repairing multi-way valve in the present embodiment, such as Fig. 1 and Shown in Fig. 2, on valve body 1 there is oil inlet P, oil return inlet T, feedback hydraulic fluid port LS, be provided with two groups of reversal valves in valve body 1, respectively For the rotating bucket that rotating bucket is overturn to be controlled to join 12 and the swing arm connection 13 for swing arm to be controlled to lift.Correspond to rotating bucket on valve body 1 and join 12 Two A of one B of actuator port and actuator port is both provided with swing arm connection 13.

Specifically, as shown in Figures 2 and 3, rotating bucket connection 12 includes the commutation valve chamber 2 and commutation valve rod 3 in valve body 1, changes There is oil-feed tank 2a, oil-recovery tank 2b, one 2c of work oil groove, two 2e of work oil groove into valve chamber 2.Work one 2c of oil groove passes through work One 1g of oil circuit is connected with one B of actuator port, and work two 2e of oil groove is connected by two 1i of working oil path with two A of actuator port.Commutation Valve rod 3 can be such that one 2c of work oil groove connects with oil-feed tank 2a to work at the same time two 2e of oil groove and oil-recovery tank 2b along the commutation slip of valve chamber 2 Connection or work one 2c of oil groove are connected with oil-recovery tank 2b and are worked at the same time two 2e of oil groove and connected with oil-feed tank 2a.Oil-recovery tank 2b distinguishes Oil return inlet T is connected with two 1b of drainback passage by one 1a of drainback passage, the hydraulic oil in oil-recovery tank 2b is imported into work in order to realize Make to carry out repairing in one 2c of oil groove, work oil groove is prevented to be emptied, return oil pressure valve 4 is provided on one 1a of drainback passage, return Fill valve 5 is provided between one 2c of oil groove 2b and work oil groove, is connected separately on two 1i of one 1g of working oil path and working oil path Overload valve 11.

Preferably, the quantity of two A of one B of actuator port and actuator port is two groups, and such structure causes more Road valve crushing smaller under big flow.

As shown in figure 4, Fill valve 5 includes valve seat 5a and oil recharging valve core 5c, there is one 1g of connection working oil path in valve body 1 With the intercommunicating pore 1h of oil-recovery tank 2b.Valve seat 5a be threaded on valve body 1 and with oil-through hole 5a1 positions face, valve seat 5a front ends In embedded intercommunicating pore 1h, valve seat 5a front ends have oil-through hole 5a1.Have connection oil-through hole 5a1's and oil-recovery tank 2b on valve seat 5a Be slidably connected oil recharging valve core 5c on repairing hole 5b, valve seat 5a, and oil recharging valve core 5c one end has the envelope positioned at valve seat 5a front end surfaces Stifled portion 5c1, the other end are provided with spring base 5d, spring base 5d by clamp spring 5j axial limitings on oil recharging valve core 5c, spring base Repairing spring 5e, oil recharging valve core 5c are provided between 5d and valve seat 5a to be had under the spring-force driven dual of repairing spring 5e towards valve The movement tendency of seat 5a simultaneously blocks the oil-through hole 5a1 of valve seat 5a front ends, the oil-through-hole two on valve seat 5a with connection oil-recovery tank 2b 5a2, valve seat 5a outer end have also been connected through a screw thread screw plug 5f.In order to ensure leakproofness of the Fill valve 5 on valve body 1, valve One 5g of sealing ring being close to intercommunicating pore 1h inner walls is provided on the outer wall of seat 5a front ends, is provided between valve seat 5a and valve body 1 The junction of sealing ring two 5h, screw plug 5f and valve seat 5a are provided with three 5i of sealing ring.

Fill valve 5 is reversed check valve, and operation principle is：When the hydraulic pressure shortage of oil in one 2c of oil groove that works, due to returning Pressure in oil groove 2b is much larger than the Opening pressure of Fill valve 5 so that oil recharging valve core 5c overcome the spring force of repairing spring 5e to Outer movement so that the closure part 5c1 of oil recharging valve core 5c outer ends is detached from the front end of valve seat 5a so that the oil-through hole 5a1 of valve seat 5a It is completely open-minded.

As shown in Fig. 2, Fig. 3 and Fig. 7, in the valve chamber 2 that commutates also there is oil return to control oil groove 2d, set on two 1b of drainback passage There is oil return control valve 6.In the present embodiment, oil return control valve 6 includes oil return and controls valve chamber 6a, is provided in oil return control valve chamber 6a Oil return controls spool 6b and oil return control spring 6c, and one end of oil return control spool 6b controls the spring masterpiece of spring 6c in oil return With lower closure two 1b of drainback passage, the other end connection oil return control oil groove 2d of oil return control spool 6b.The valve rod 3 that commutates is interior to be had There is axially disposed long oilhole 3a, the peripheral surface of commutation valve rod 3 has one 3b of oil guiding hole and oil guiding hole for connecting long oilhole 3a Two 3c.During so that commutation valve rod 3 making one 2c of work oil groove be connected with oil-feed tank 2a along the commutation slip of valve chamber 2, one 3b of oil guiding hole Two 3c of oil guiding hole is opposite with oil-recovery tank 2b positions while opposite with oil return control oil groove 2d positions, makes oil return control oil groove 2d Oil-recovery tank 2b is connected, due to the oil pressure balance at oil return control spool 6b both ends, oil return control spool 6b blocks two 1b of drainback passage, Oil return control valve 6 is closed；When oil return control oil groove 2d is not connected with oil-recovery tank 2b, due to the spring force of oil return control spring 6c Smaller, the hydraulic oil in oil-recovery tank 2b easily open-top oil return can control spool 6b and pass through two 1b oil returns of drainback passage, at this time Return oil pressure valve 4 does not work.Preferably, oil return control spool 6b blocks oil-recovery tank 2b and one end tool of oil return inlet T There is one 6b1 of oil-through-hole through oil return control spool 6b sides.By setting one 6b1 of oil-through-hole that can improve drainback passage two The logical oil mass of 1b so that the oil return of two 1b of drainback passage is more smooth, reduces the pressure loss.

As shown in Figure 1, Figure 2 and Figure 3, the oil charging structure of work one 2c of oil groove and two 2e of oil groove that works are：Commutate valve chamber 2 It is interior that there is oily oil groove 2f, have in valve body 1 with one 1c of oil duct that oil oil groove 2f connect excessively, in the valve rod 3 that commutates in valve body 1 Two 1e of oil duct of one 1c of oil duct and one 2c of oil groove that works can be connected during slip, having in valve body 1 can connect when the valve rod 3 that commutates slides Three 1f of oil duct of two 2e of one 1c of oil canal and work oil groove.In line check valve is respectively arranged in three 1f of two 1e of oil duct and oil duct 7.In one 1c of oil duct also there is the feedback oil groove 1c1 connected by feeding back oil circuit with feeding back hydraulic fluid port LS, be provided in one 1c of oil duct One 1c of oil duct can be connected and feed back the pressure-compensated valve 8 of oil groove 1c1, feedback overflow valve 9 is provided on feedback oil circuit and feedback saves Flow valve 10.

Preferably, there is the throttling notch 3d for corresponding to oily oil groove 2f, commutation valve rod 3 slides on commutation valve rod 3 Make one 1c of oil duct with work one 2c of oil groove connect when, oil-feed tank 2a pass through commutate the throttling notch 3d on valve rod 3 connection oil duct one 1c.Repairing is carried out from hydraulic oil enough oil-recovery tank 2b since work one 2c of oil groove has at work, by work oil groove The oil inlet position setting throttle structure of one 2c, is not using full flow in oil inlet, can reduce the power of variable pump, more save Energy.

Rotating bucket connection 12 operation principle be：As shown in figure 3, when commutation valve rod 3 is located at middle position, work one 2c of oil groove and work Two 2e of oil groove is not connected with oil-feed tank 2a or oil-recovery tank 2b, and feedback oil groove 1c1 is also flowed into without hydraulic oil, oil supply system Variable pump is in idling mode, and executing agency is failure to actuate.

As shown in figure 5, when the valve rod 3 that commutates moves to right position, the hydraulic oil in oil-feed tank 2a is by commutating on valve rod 3 Throttling notch 3d entered oily oil groove 2f, enters back into one 1c of oil duct and the spring force of pressure-compensated valve 8 is overcome to enter two 1e of oil duct With feedback oil groove 1c1, the hydraulic oil in two 1e of oil duct is opened after in line check valve 7 by valve rod 3 and the valve chamber 2 that commutates of commutating Gap enters one 2c of work oil groove, works at the same time two 2e of oil groove connection oil-recovery tanks 2b.So that work one 2c oil inlets of oil groove, Work two 2e oil returns of oil groove, realizes the tipping bucket action of rotating bucket.

When the valve rod 3 that commutates is located at right position, the oil return control oil groove 2d of annular plate valve intracavitary is connected with oil-recovery tank 2b so that Oil return control valve 6 is closed, and under the action of return oil pressure valve 4, the oil pressure in oil-recovery tank 2b rises.In this course, if Since the reversal rate of rotating bucket is too fast, lead to the hydraulic pressure shortage of oil in one 2c of work oil groove, Fill valve 5 will be opened so that return Hydraulic oil in oil groove 2b can be added to timely in one 2c of work oil groove, prevent one 2c of work oil groove from emptying phenomenon occurs.

As shown in fig. 6, when the valve rod 3 that commutates moves to left position, the hydraulic oil in oil-feed tank 2a is through one 1c of oil channel and oil Three 1f of road, and enter two 2e of work oil groove from the gap of commutation valve rod 3 and the valve chamber 2 that commutates, it works at the same time one 2c of oil groove and connects back Oil groove 2b.So that work two 2e oil inlets of oil groove, work one 2c oil returns of oil groove, realizes the receipts bucket action of rotating bucket.In this mistake Cheng Zhong, oil return control oil groove 2d are not connected with oil-recovery tank 2b, and oil return control valve 6 is opened, and hydraulic oil directly passes through oil return control valve 6, from the direct oil returns of two 1b of drainback passage, avoid pressure loss during oil return.

As shown in Figure 1, the swing arm in the present embodiment joins 13 structures and rotating bucket connection 12 is essentially identical, which is not described herein again.Area Part is not, swing arm connection 13 increases floating bit, by oil inlet P slot, oil-recovery tank 2b, work one 2c of oil groove and work oil groove two 2e is connected, by executing agency from the position of recanalization swing arm.

What the action of this band judged forces repairing multi-way valve to pass through the feedback under different action states, control oil return control valve 6 Opening and closing so that work one 2c oil inlets of oil groove when can by oil-recovery tank 2b carry out repairing prevent from being emptied, work oil groove Relatively low return pressure can be kept during one 2c oil returns again, reduces energy loss caused by oil return.

The pressure repairing multi-way valve that the action of this band judges can also be answered in addition to can be applied in the structure of two groups of reversal valves In structure for single reversal valve, such as structure shown in fig. 8.

The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute Described specific embodiment can be done various modifications or additions or using similar by belonging to those skilled in the art Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.

Claims (10)

1. the pressure repairing multi-way valve that a kind of action of band judges, commutation valve chamber (2) including valve body (1), in valve body (1) and Commutate valve rod (3), has oil inlet (P) and oil return opening (T) on the valve body (1), and the commutation valve chamber (2) has oil-feed tank (2a), oil-recovery tank (2b), work oil groove one (2c) and work oil groove two (2e), the oil-recovery tank (2b) connect with oil return opening (T) Drainback passage one (1a) on be provided with return oil pressure valve (4), set between the oil-recovery tank (2b) and work oil groove one (2c) There is Fill valve (5), which is characterized in that also there is oil return control oil groove (2d), the oil-recovery tank (2b) in the commutation valve chamber (2) Oil return control valve (6), the work oil groove one (2c) and oil inlet are provided on the drainback passage two (1b) connected with oil return opening (T) When slot (2a) connects, oil return control oil groove (2d) is connected with oil-recovery tank (2b) closes oil return control valve (6), in oil-recovery tank (2b) Oil pressure raising after overcome return oil pressure valve (4) pressure pass through drainback passage one (1a) connect oil return opening (T) oil return；The work When making oil groove one (2c) and being connected with oil-recovery tank (2b), oil return control oil groove (2d) makes oil return control valve with oil-recovery tank (2b) disconnection (6) it opens, oil-recovery tank (2b) directly connects oil return opening (T) oil return by drainback passage two (1b).

2. the pressure repairing multi-way valve that band action according to claim 1 judges, which is characterized in that the oil return control valve (6) including oil return control valve chamber (6a), the oil return control valve chamber (6a) is interior to be provided with oil return control spool (6b) and oil return control Spring (6c) processed, one end of the oil return control spool (6b) block oil return under the spring-force driven dual of oil return control spring (6c) Channel two (1b), the other end connection oil return control oil groove (2d) of the oil return control spool (6b).

3. the pressure repairing multi-way valve that band action according to claim 2 judges, which is characterized in that the oil return control valve Core (6b), which blocks oil-recovery tank (2b) and one end of oil return opening (T), has the oil-through-hole one through oil return control spool (6b) side (6b1)。

4. the pressure repairing multi-way valve that the band action according to claims 1 or 2 or 3 judges, which is characterized in that the commutation There is axially disposed long oilhole (3a), the peripheral surface of the commutation valve rod (3), which has, connects long oilhole (3a) in valve rod (3) Oil guiding hole one (3b) and oil guiding hole two (3c), it is described commutation valve rod (3) along commutation valve chamber (2) slide make work oil groove one When (2c) is connected with oil-feed tank (2a), the oil guiding hole while oil guiding hole one (3b) is opposite with oil return control oil groove (2d) position Two (3c) are opposite with oil-recovery tank (2b) position, make oil return that oil groove (2d) be controlled to connect oil-recovery tank (2b).

5. the pressure repairing multi-way valve that the band action according to claims 1 or 2 or 3 judges, which is characterized in that the commutation In valve chamber (2) there is oily oil groove (2f), there is the oil duct one (1c) connected with excessively oily oil groove (2f), institute in the valve body (1) State the oil duct two for having in valve body (1) and oil duct one (1c) and the oil groove one (2c) that works being connected when the valve rod (3) that commutates slides (1e), the valve body (1) is interior to have the oil that oil duct one (1c) and the oil groove two (2e) that works can be connected when the valve rod (3) that commutates slides Road three (1f).

6. the pressure repairing multi-way valve that band action according to claim 5 judges, which is characterized in that the commutation valve rod (3) there is the throttling notch (3d) for corresponding to oily oil groove (2f), the commutation valve rod (3), which is slided, makes oil duct one (1c) and work on When oil groove one (2c) connects, the oil-feed tank (2a) connects oil duct one (1c) by the throttling notch (3d) on the valve rod that commutates (3).

7. the pressure repairing multi-way valve that band action according to claim 5 judges, which is characterized in that the oil duct one (1c) Inside also there is the feedback oil groove (1c1) connected by feeding back oil circuit with feeding back hydraulic fluid port (LS), be provided in the oil duct one (1c) Oil duct one (1c) can be connected and feed back the pressure-compensated valve (8) of oil groove (1c1).

8. the pressure repairing multi-way valve that the band action according to claims 1 or 2 or 3 judges, which is characterized in that the valve body (1) actuator port one (B) and actuator port two (A) are additionally provided on, the work oil groove one (2c) passes through working oil path one (1g) is connected with actuator port one (B)；The Fill valve (5) includes valve seat (5a) and oil recharging valve core (5c), and the valve body (1) is interior Intercommunicating pore (1h) with connection working oil path one (1g) and oil-recovery tank (2b), the front end of the valve seat (5a) is embedded in above-mentioned company In through-hole (1h) and the front end of valve seat (5a) has oil-through hole (5a1), and the valve seat (5a) is threaded on valve body (1), institute Stating has the repairing hole (5b) of connection oil-through hole (5a1) and oil-recovery tank (2b) on valve seat (5a), the oil recharging valve core (5c) is slided It is connected in valve seat (5a), described oil recharging valve core (5c) one end has the closure part (5c1) for being located at valve seat (5a) front end surface, separately One end is provided with spring base (5d), and repairing spring (5e), the repairing are provided between the spring base (5d) and valve seat (5a) Spool (5c) has the movement tendency towards valve seat (5a) rear end under the spring-force driven dual of repairing spring (5e) and blocks valve seat The oil-through hole (5a1) of (5a) front end, valve seat (5a) rear end has the oil-through-hole two (5a2) of connection oil-recovery tank (2b), described Valve seat (5a) rear end end has also been connected through a screw thread screw plug (5f).

9. the pressure repairing multi-way valve that band action according to claim 8 judges, which is characterized in that the work oil groove two (2e) is connected by working oil path two (1i) with actuator port two (A), the working oil path one (1g) and working oil path two (1i) On be connected separately with overload valve (11).

10. the pressure repairing multi-way valve that band action according to claim 8 judges, which is characterized in that the actuator port The quantity of one (B) and actuator port two (A) is two groups.