CN201461582U - Multi-channel proportional flow rate distributing valve group for various variable output pump systems - Google Patents

Multi-channel proportional flow rate distributing valve group for various variable output pump systems Download PDF

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Publication number
CN201461582U
CN201461582U CN2009201234487U CN200920123448U CN201461582U CN 201461582 U CN201461582 U CN 201461582U CN 2009201234487 U CN2009201234487 U CN 2009201234487U CN 200920123448 U CN200920123448 U CN 200920123448U CN 201461582 U CN201461582 U CN 201461582U
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China
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valve
communicated
proportional reversing
group
recuperation
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CN2009201234487U
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卢宇
李新
刘富良
刘峰
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Abstract

The utility model discloses a multi-channel proportional flow rate distributing valve group for various variable output pump systems, comprising a first pressure pipeline and a second pressure pipeline which are communicated with an external oil pump, and an oil return pipeline which is communicated with external return oil; the first pressure pipeline is respectively communicated with a first spillover valve, a first three-way flow valve, a first proportional reversing valve and an oil inlet end of a second first proportional reversing valve; correspondingly, the second pressure pipeline is respectively communicated with a second spillover valve, a second three-way flow valve, a third proportional reversing valve and an oil inlet end of a fourth first proportional reversing valve, so as to greatly improve the operation performance and realize proportional stepless regulation of a plurality of actuating mechanisms under different loads; a main oil path is unloaded by the diverter valves, so as to effectively prevent the pressure impact and effectively slow down even eliminate the shaking of the mechanisms when the proportional speed regulation is carried out; a logic switch valve is connected in the middle in a transition way, when in operation, the two actions are non-interfering, so as to realize simultaneous working of multiple actions.

Description

Be suitable for the multi-channel proportional flow divider valve group of multiple variable pump systems
Technical field
The utility model relates to the technical field of hydrovalve, particularly a kind of multi-channel proportional flow divider valve group that is suitable for multiple variable pump systems.Be applicable to all kinds of hydraulic mobile crane variable pump systems in the engineering machinery, comprise get on the bus each operating mechanism of loop hydraulic system of tyre type, crawler crane, realize the ratio stepless speed regulation of several actuators under different load separately.
Background technique
Modern hydraulic construction machine; in the energy-efficient while of pursuing proportionality velocity modulation, ratio assignment of traffic; and the diesel engine output power that drives oil pump protected; prevent that overload is flame-out and shut down; the permanent power and variable pumping system of normal for this reason employing; and domestic and international valve post-compensation ratio flow divider valve group newly developed, it is only applicable to the load-sensitive variable pump systems, and using scope is restricted.
Summary of the invention
Technical problem to be solved in the utility model is the present situation at prior art, provide a kind of simple in structure, load convenient, handiness, hydraulic shock power is little and the independent non-interfering multi-channel proportional flow divider valve group that is suitable for multiple variable pump systems of action.The double-pump switching valve of load-sensitive logic is set between the loop of pump, and inner the realization automatically collaborated or shunting, and the reduction operation fatigue simplifies the operation.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: the multi-channel proportional flow divider valve group that is suitable for multiple variable pump systems, comprise first pressure piping, second pressure piping that outside oil pump is communicated with, and the return line that is communicated with outside oil return; First pressure piping and second pressure piping are communicated with first selector valve respectively, and this first selector valve is controlled the break-make of first pressure piping and second pressure piping; The spool drive end of first selector valve is communicated with second selector valve; First pressure piping is communicated with the oil inlet end of first relief valve, the first three-way flow metered valve and at least one proportional reversing valve respectively; And the oil revolving end of this first relief valve, the first three-way flow metered valve and proportional reversing valve all is communicated with return line; Correspondingly, second pressure piping is communicated with the oil inlet end of second relief valve, the second three-way flow metered valve and at least one proportional reversing valve respectively; And the oil revolving end of this second relief valve, the second three-way flow metered valve and proportional reversing valve all is communicated with return line; The first three-way flow metered valve flow-off is communicated with return line, and delivery outlet is communicated with the first load-sensitive loop, and correspondingly, the second three-way flow metered valve flow-off is communicated with return line, and delivery outlet is communicated with the second load-sensitive loop; The second load-sensitive loop all is communicated with described first selector valve with the first load-sensitive loop, and this first selector valve is also controlled the break-make in the second load-sensitive loop and the first load-sensitive loop.
The measure of taking also comprises:
The proportional reversing valve that the first above-mentioned pressure piping is communicated with is two, promptly is respectively first proportional reversing valve and second proportional reversing valve; Described first proportional reversing valve, one control mouth is communicated with an import and a spool drive end of first recuperation valve, this first recuperation valve, one outlet and another spool drive end and first load-sensitive circuit communication simultaneously; Correspondingly, above-mentioned second proportional reversing valve, one control mouth is communicated with an import and a spool drive end of second recuperation valve, this second recuperation valve, one outlet and another spool drive end and first load-sensitive circuit communication simultaneously.
The proportional reversing valve that the second above-mentioned pressure piping is communicated with also is two, i.e. the 3rd proportional reversing valve and the 4th proportional reversing valve; The 3rd proportional reversing valve one control mouth is communicated with an import and a spool drive end of the 3rd recuperation valve, the 3rd recuperation valve one outlet and another spool drive end and the described second load-sensitive circuit communication simultaneously; The 4th proportional reversing valve one control mouth is communicated with an import and a spool drive end of the 4th recuperation valve, the 4th recuperation valve one outlet and another spool drive end and the second load-sensitive circuit communication simultaneously.
The first above-mentioned proportional reversing valve is shaped on four controls mouthful, and two of other three controls mouthful are communicated with simultaneously with another outlet of first recuperation valve, and the 4th controls mouth is communicated with return line; The first above-mentioned proportional reversing valve is shaped on two delivery outlets, and these two delivery outlets are communicated with first group of working hole respectively; Also be communicated with first time the level relief valve on first group of working hole, correspondingly, also be communicated with the second subprime relief valve on first group of working hole, and the flow-off of this second subprime relief valve, first level relief valve all is communicated with return line.
The second above-mentioned proportional reversing valve is shaped on four controls mouthful, and two of other three controls mouthful are communicated with simultaneously with another outlet of second recuperation valve, and the 4th controls mouth is communicated with return line; The second above-mentioned proportional reversing valve is shaped on two delivery outlets, and these two delivery outlets are communicated with second group of working hole respectively; Also be communicated with for the third time the level relief valve on second group of working hole, correspondingly, also be communicated with the level relief valve on second group of working hole the 4th time, and the 4th level relief valve, the flow-off of level relief valve all is communicated with return line for the third time.
Above-mentioned first recuperation valve, one spool drive end also is communicated with one import of first shuttle valve, correspondingly, above-mentioned second recuperation valve, one spool drive end also is communicated with another import of first shuttle valve, and the central exit of this first shuttle valve is communicated with the spool drive end of second selector valve; Also be provided with first one-way valve between the first load-sensitive loop and first pressure piping.
The 3rd above-mentioned proportional reversing valve is shaped on four controls mouthful, and two of other three controls mouthful are communicated with simultaneously with another outlet of the 3rd recuperation valve, and the 4th controls mouth is communicated with return line; The 3rd above-mentioned proportional reversing valve is shaped on two delivery outlets, and these two delivery outlets are communicated with the 3rd group of working hole respectively; Also be communicated with the 6th time the level relief valve on the 3rd group of working hole, correspondingly, also be communicated with the 5th time the level relief valve on the 3rd group of working hole, and the flow-off of the 5th level relief valve, the 6th level relief valve all is communicated with return line.
The 4th above-mentioned proportional reversing valve is shaped on four controls mouthful, and two of other three controls mouthful are communicated with simultaneously with another outlet of the 4th recuperation valve, and the 4th controls mouth is communicated with return line; The 4th above-mentioned proportional reversing valve is shaped on two delivery outlets, and these two delivery outlets are communicated with the 4th group of working hole respectively; Also be communicated with the 8th time the level relief valve on the 4th group of working hole, correspondingly, also be communicated with the 7th time the level relief valve on the 4th group of working hole, and the flow-off of the 7th level relief valve, the 8th level relief valve all is communicated with return line.
Above-mentioned the 7th level relief valve, the 8th level relief valve are built-in with the repairing one-way valve; Above-mentioned the 3rd recuperation valve one spool drive end also is communicated with one import of second shuttle valve, correspondingly, above-mentioned the 4th recuperation valve one spool drive end also is communicated with another import of second shuttle valve, and the central exit of this second shuttle valve is communicated with a working hole of second selector valve; Also be provided with second one-way valve between the second load-sensitive loop and second pressure piping.
The first above-mentioned relief valve, the first three-way flow metered valve and first one-way valve all are installed on first pump side connection, and first pump side connection is shaped on the first remote control mouth and first pressure tap; Also be installed in parallel the first return oil pressure valve and the second return oil pressure valve on first pump side connection, and the filler opening of this first return oil pressure valve and the second return oil pressure valve is communicated with described return line, oil outlet corresponds to first group of return opening; Correspondingly, second relief valve, the second three-way flow metered valve and second one-way valve all are installed on second pump side connection, and second pump side connection is shaped on the second remote control mouth and second pressure tap; Also be installed in parallel the 3rd return oil pressure valve and the 4th return oil pressure valve on second pump side connection, and the filler opening of the 3rd return oil pressure valve and the 4th return oil pressure valve is communicated with return line, oil outlet correspond to second group of return opening.
The first above-mentioned proportional reversing valve, first recuperation valve, first level relief valve and second subprime relief valve all are installed on second valve connection; Second proportional reversing valve, second recuperation valve, level relief valve, the 4th level relief valve and first shuttle valve all are installed on the 3rd valve connection for the third time; The 3rd proportional reversing valve, the 3rd recuperation valve, the 5th level relief valve, the 6th level relief valve and second shuttle valve all are installed on the 5th valve connection; The 4th proportional reversing valve, the 4th recuperation valve, the 7th level relief valve and the 8th level relief valve all are installed on the 6th valve connection; Between the 5th valve connection and the 3rd valve connection also pad be provided with and switch connection, and first pump side connection, second valve connection, the 3rd valve connection, switch connection, the 5th valve connection, the 6th valve connection and second pump side connection and join through bolt seal stack subsides successively.
The first above-mentioned selector valve, second selector valve are all equipped with the switching connection; In the above-mentioned switching connection four safety valves are installed also, wherein the import of two safety valves all with the first load-sensitive circuit communication, correspondingly, the import of two other safety valve all with the second load-sensitive circuit communication, and the outlet of this safety valve all is communicated with return line.
Compared with prior art, the utility model comprises first pressure piping, second pressure piping that outside oil pump is communicated with, and the return line that is communicated with outside oil return; First pressure piping is communicated with the oil inlet end of first relief valve, the first three-way flow metered valve, first proportional reversing valve and second proportional reversing valve respectively; And the oil revolving end of this first relief valve, the first three-way flow metered valve, first proportional reversing valve and second proportional reversing valve all is communicated with return line; Correspondingly, second pressure piping is communicated with the oil inlet end of second relief valve, the second three-way flow metered valve, the 3rd proportional reversing valve and the 4th proportional reversing valve respectively; And the oil revolving end of this second relief valve, the second three-way flow metered valve, the 3rd proportional reversing valve and the 4th proportional reversing valve all is communicated with return line; The utility model advantage is: manoeuvring performance is significantly improved, can realize the ratio stepless speed regulation of several actuators under different load separately; Working connection unloads by diverter valve, can effectively prevent compression shock, effectively slows down when proportionality velocity modulation, even eliminates the shake of mechanism; The middle transition multi pack has the logic switch valve, and two actions are not disturbed mutually during manipulation, can realize that a plurality of actions work simultaneously.
Description of drawings
Fig. 1 is the utility model embodiment's a hydraulic principle schematic representation;
Fig. 2 is the external form schematic representation of the utility model embodiment when equipped;
Fig. 3 is the hydraulic principle schematic representation of the utility model embodiment first pump side connection;
Fig. 4 is the cross-sectional schematic of the utility model embodiment first pump side connection;
Fig. 5 is the hydraulic principle schematic representation that the utility model embodiment is switched connection;
Fig. 6 is the cross-sectional schematic that the utility model embodiment is switched connection.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Extremely shown in Figure 6 as Fig. 1, the utility model embodiment, the multi-channel proportional flow divider valve group of suitable multiple variable pump systems comprises the first pressure piping P1, the second pressure piping P2 that outside oil pump is communicated with, and the return line T that is communicated with outside oil return; The first pressure piping P1 and the second pressure piping P2 are communicated with the first selector valve V3 respectively, and this first selector valve V3 controls the break-make of the first pressure piping P1 and the second pressure piping P2; The spool drive end of the first selector valve V3 is communicated with the second selector valve V4; The first pressure piping P1 is communicated with the oil inlet end of the first relief valve R1, the first three-way flow metered valve PC1 and at least one proportional reversing valve respectively; And the oil revolving end of this first relief valve R1, the first three-way flow metered valve PC1 and proportional reversing valve all is communicated with described return line T; Correspondingly, the second pressure piping P2 is communicated with the oil inlet end of the second relief valve R2, the second three-way flow metered valve PC2 and at least one proportional reversing valve respectively; And the oil revolving end of this second relief valve R2, the second three-way flow metered valve PC2 and proportional reversing valve all is communicated with return line T; The first three-way flow metered valve PC1 flow-off is communicated with return line T, and delivery outlet is communicated with the first load-sensitive loop LS1, and correspondingly, the second three-way flow metered valve PC2 flow-off is communicated with return line T, and delivery outlet is communicated with the second load-sensitive loop LS2; The second load-sensitive loop LS2 all is communicated with the first selector valve V3 with the first load-sensitive loop LS1, and this first selector valve V3 also controls the break-make of the second load-sensitive loop LS2 and the first load-sensitive loop LS1.
Present embodiment is achieved in that the proportional reversing valve that the first pressure piping P1 is communicated with is two, promptly is respectively the first proportional reversing valve DV1 and the second proportional reversing valve DV2; The first proportional reversing valve DV1, one control mouth is communicated with an import and the spool drive end of the first recuperation valve SC1 simultaneously, and this first recuperation valve SC1 one outlet and another spool drive end are communicated with the first load-sensitive loop LS1; Correspondingly, the second proportional reversing valve DV2, one control mouth is communicated with an import and the spool drive end of the second recuperation valve SC2 simultaneously, and this second recuperation valve SC2 one outlet and another spool drive end are communicated with the first load-sensitive loop LS1; The proportional reversing valve that the second pressure piping P2 is communicated with also is two, i.e. the 3rd proportional reversing valve DV3 and the 4th proportional reversing valve DV4; The 3rd proportional reversing valve DV3 one control mouth is communicated with an import and the spool drive end of the 3rd recuperation valve SC3 simultaneously, and the 3rd recuperation valve SC3 one outlet and another spool drive end are communicated with the second load-sensitive loop LS2; The 4th proportional reversing valve DV4 one control mouth is communicated with an import and the spool drive end of the 4th recuperation valve SC4 simultaneously, and the 4th recuperation valve SC4 one outlet and another spool drive end are communicated with the second load-sensitive loop LS2.
The first proportional reversing valve DV1 is shaped on four controls mouthful, and two of other three controls mouthful are communicated with simultaneously with another outlet of the first recuperation valve SC1, and the 4th controls mouth is communicated with described return line T; The first proportional reversing valve DV1 is shaped on two delivery outlets, and these two delivery outlets are communicated with first group of working hole A1, B1 respectively; Also be communicated with level relief valve PR1 on first group of working hole A1 first time, correspondingly, also be communicated with second subprime relief valve PR2 on first group of working hole B1, and the flow-off of this second subprime relief valve PR2, first level relief valve PR1 is communicated with return line T all.
The second proportional reversing valve DV2 is shaped on four controls mouthful, and two of other three controls mouthful are communicated with simultaneously with another outlet of the second recuperation valve SC2, and the 4th controls mouth is communicated with return line T; The second proportional reversing valve DV2 is shaped on two delivery outlets, and these two delivery outlets are communicated with second group of working hole A2, B2 respectively; Also be communicated with level relief valve PR3 for the third time on second group of working hole A2, correspondingly, also be communicated with level relief valve PR4 on second group of working hole B2 the 4th time, and the 4th level relief valve PR4, the flow-off of level relief valve PR3 is communicated with return line T all for the third time.
The first recuperation valve SC1, one spool drive end also is communicated with the first shuttle valve SV1, one import, correspondingly, the second recuperation valve SC2, one spool drive end also is communicated with first another import of shuttle valve SV1, and the central exit of this first shuttle valve SV1 is communicated with the spool drive end of the second selector valve V4; Also be provided with the first one-way valve DF1 between the first load-sensitive loop LS1 and the first pressure piping P1.
The 3rd proportional reversing valve DV3 is shaped on four controls mouthful, and two of other three controls mouthful are communicated with simultaneously with another outlet of the 3rd recuperation valve SC3, and the 4th controls mouth is communicated with return line T; The 3rd proportional reversing valve DV3 is shaped on two delivery outlets, and these two delivery outlets are communicated with the 3rd group of working hole A3, B3 respectively; Also be communicated with the 6th time level relief valve PR6 on the 3rd group of working hole A3, correspondingly, also be communicated with the 5th time level relief valve PR5 on the 3rd group of working hole B3, and the flow-off of the 5th level relief valve PR5, the 6th level relief valve PR6 is communicated with return line T all.
The 4th proportional reversing valve DV4 is shaped on four controls mouthful, and two of other three controls mouthful are communicated with simultaneously with another outlet of the 4th recuperation valve SC4, and the 4th controls mouth is communicated with described return line T; The 4th proportional reversing valve DV4 is shaped on two delivery outlets, and these two delivery outlets are communicated with the 4th group of working hole A4, B4 respectively; Also be communicated with the 8th time level relief valve PR8 on the 4th group of working hole A4, correspondingly, also be communicated with the 7th time level relief valve PR7 on the 4th group of working hole B4, and the flow-off of the 7th level relief valve PR7, the 8th level relief valve PR8 is communicated with return line T all.
The 7th time level relief valve PR7, the 8th level relief valve PR8 are built-in with the repairing one-way valve; The 3rd recuperation valve SC3 one spool drive end also is communicated with the second shuttle valve SV2, one import, correspondingly, the 4th recuperation valve SC4 one spool drive end also is communicated with second another import of shuttle valve SV2, and the central exit of this second shuttle valve SV2 is communicated with the working hole of the second selector valve V4; Also be provided with the second one-way valve DF2. between the second load-sensitive loop LS2 and the second pressure piping P2
The first relief valve R1, the first three-way flow metered valve PC1 and the first one-way valve DF1 all are installed on first pump side connection 1, and first pump side connection 1 is shaped on the first remote control mouth V1 and the first pressure tap MP1; The first return oil pressure valve RB1 and the second return oil pressure valve RB2 also have been installed in parallel on first pump side connection 1, and the filler opening of this first return oil pressure valve RB1 and the second return oil pressure valve RB2 is communicated with return line T, and oil outlet corresponds to first group of oil return inlet T 1, T2; Correspondingly, the second relief valve R2, the second three-way flow metered valve PC2 and the second one-way valve DF2 all are installed on second pump side connection 7, and second pump side connection 7 is shaped on the second remote control mouth V2 and the second pressure tap MP2; The 3rd return oil pressure valve RB3 and the 4th return oil pressure valve RB4 also have been installed in parallel on second pump side connection 7, and the filler opening of the 3rd return oil pressure valve RB3 and the 4th return oil pressure valve RB4 is communicated with return line T, and oil outlet corresponds to second group of oil return inlet T 3, T4.
The first proportional reversing valve DV1, the first recuperation valve SC1, first level relief valve PR1 and second subprime relief valve PR2 all are installed on second valve connection 2; The second proportional reversing valve DV2, the second recuperation valve SC2, level relief valve PR3, the 4th level relief valve PR4 and the first shuttle valve SV1 all are installed on the 3rd valve connection 3 for the third time; The 3rd proportional reversing valve DV3, the 3rd recuperation valve SC3, the 5th level relief valve PR5, the 6th level relief valve PR6 and the second shuttle valve SV2 all are installed on the 5th valve connection 5; The 4th proportional reversing valve DV4, the 4th recuperation valve SC4, the 7th level relief valve PR7 and the 8th level relief valve PR8 all are installed on the 6th valve connection 6; Between the 5th valve connection the 5 and the 3rd valve connection 3 also pad be provided with and switch connection 4, and first pump side connection, 1, second valve connection the 2, the 3rd valve connection 3, switch connection the 4, the 5th valve connection the 5, the 6th valve connection 6 and second pump side connection 7 and join through bolt seal stack subsides successively.
The first selector valve V3, the second selector valve V4 are all equipped with switching connection 4; Switch in the connection 4 four safety valve V5 also are installed, wherein the import of two safety valve V5 all is communicated with the first load-sensitive loop LS1, correspondingly, the import of two other safety valve V5 all is communicated with the second load-sensitive loop LS2, and the outlet of this safety valve V5 all is communicated with return line T.
Be illustrated in figure 1 as the utility model embodiment's hydraulic principle schematic representation, the Proportional valve that it indicated is four, and promptly the pairing Proportional valve of each pump is two.
The proportional reversing valve connection is illustrated in figure 2 as the utility model embodiment's external form schematic representation, adopts slice structure, so can be set up or reduce according to demand.
Fig. 3 and shown in Figure 4, hydraulic principle schematic representation and corresponding assembling cross-sectional schematic for first pump side connection 1 among the utility model embodiment, the structure of first pump side connection 1 in the utility model embodiment is identical with structure, the principle of second pump side connection 7, and existing is that example is discussed with first pump side connection 1; First pump side joins 1 diverter valve and forms by the first relief valve R1, the first three-way flow metered valve PC1, the first one-way valve DF1, the first return oil pressure valve RB1 and the second return oil pressure valve RB2 are equipped; The first pressure piping P1 mouth pressure will be higher than spring chamber pressure under the meta state, the first one-way valve DF1 is in closed condition, the first pressure piping P1 mouth pressure arrives the spool front end by damping, oppositely overcoming spring force promotion spool moves upward, have kidney type chute on the spool, flow now unloads to return line T cause for gossip from the first pressure piping P1 by chute; When mechanism works, induced pressure LS1 passes to the check valve spring chamber, but be less than the first pressure piping P1 mouth pressure all the time, the first one-way valve DF1 still keeps closed condition, LS1 adds that check valve spring tries hard to recommend movable valve plug the passage of the first pressure piping P1 and return line T mouth is turned down gradually, to realize the needed flow of load, along with the main variation of handling the spool aperture, the first pressure piping P1 also changes to the passage of return line T, to realize that flow changes with main valve plug aperture direct ratio; Return meta when handling spool, the check valve spring cavity pressure will be higher than the first pressure piping P1 mouth pressure, the first one-way valve DF1 opens, the check valve spring cavity pressure discharges, working connection unloads by diverter valve, this structure can effectively prevent compression shock, effectively slows down even eliminate the shake of mechanism when proportionality velocity modulation.
Fig. 5 and shown in Figure 6 is for switching the hydraulic principle schematic representation and the corresponding assembling cross-sectional schematic of connection 4 among the utility model embodiment; The first selector valve V3, the second selector valve V4 and four safety valve V5, the first load-sensitive loop LS1 is from second valve connection the 2 and the 3rd valve connection 3; The second load-sensitive loop LS2 is from the 5th valve connection the 5 and the 6th valve connection 6; Between second valve connection the 2 and the 3rd valve connection 3, the first load-sensitive loop LS1 that the first shuttle valve SV1 selects high pressure is housed, correspondingly, between the 5th valve connection the 5 and the 6th valve connection 6, the second load-sensitive loop LS2 that the second shuttle valve SV2 selects high pressure is housed; When second valve connection the 2 and the 3rd valve connection the 3 or the 5th valve connection the 5 and the 6th valve connection 6 is not worked, the second selector valve V4 is inoperative, the first selector valve V3, one end valve core is connected return line T mouth, and the first pressure piping P1, the second pressure piping P2 and the first load-sensitive loop LS1, the second load-sensitive loop LS2 are in the interflow state; When second valve connection the 2 and the 3rd valve connection the 3 or the 5th valve connection the 5 and the 6th valve connection 6 wherein when working simultaneously, second selector valve V4 output pushed at high pressure, the first selector valve V3, one end valve core overcomes the spring force motion, the first pressure piping P1, the second pressure piping P2 and the first load-sensitive loop LS1, the second load-sensitive loop LS2 are isolated when handling two actions and are not disturbed mutually, can realize that a plurality of actions work simultaneously.
The utility model embodiment is widely used in all kinds of hydraulic mobile crane variable pump systems in the engineering machinery, comprise get on the bus each operating mechanism of loop hydraulic system of tyre type, crawler crane, realize the ratio stepless scheduling of several actuators under different load separately; Can reach generalization to a greater extent, modification derives tandem product, increases new technology content and has broken the single situation of applicable object.
The utility model advantage is: manoeuvring performance is significantly improved, can realize the ratio stepless speed regulation of several actuators under different load separately; Working connection unloads by diverter valve, can effectively prevent compression shock, effectively slows down when proportionality velocity modulation, even eliminates the shake of mechanism; The middle transition multi pack has the logic switch valve, and two actions are not disturbed mutually during manipulation, can realize that a plurality of actions work simultaneously.
Most preferred embodiment of the present utility model is illustrated, and various variations or the remodeling made by those of ordinary skills can not break away from scope of the present utility model.

Claims (10)

1. be suitable for the multi-channel proportional flow divider valve group of multiple variable pump systems, comprise first pressure piping (P1), second pressure piping (P2) that outside oil pump is communicated with, and the return line (T) that is communicated with outside oil return; It is characterized in that: described first pressure piping (P1) is communicated with first selector valve (V3) respectively with second pressure piping (P2), and the break-make of this first selector valve (V3) control first pressure piping (P1) and second pressure piping (P2); The spool drive end of described first selector valve (V3) is communicated with second selector valve (V4);
Described first pressure piping (P1) is communicated with the oil inlet end of first relief valve (R1), the first three-way flow metered valve (PC1) and at least one proportional reversing valve respectively; And the oil revolving end of this first relief valve (R1), the first three-way flow metered valve (PC1) and proportional reversing valve all is communicated with described return line (T); Correspondingly, described second pressure piping (P2) is communicated with the oil inlet end of second relief valve (R2), the second three-way flow metered valve (PC2) and at least one proportional reversing valve respectively; And the oil revolving end of this second relief valve (R2), the second three-way flow metered valve (PC2) and proportional reversing valve all is communicated with described return line (T);
Described first three-way flow metered valve (PC1) flow-off is communicated with return line (T), delivery outlet is communicated with the first load-sensitive loop (LS1), correspondingly, described second three-way flow metered valve (PC2) flow-off is communicated with return line (T), and delivery outlet is communicated with the second load-sensitive loop (LS2); The described second load-sensitive loop (LS2) all is communicated with described first selector valve (V3) with the first load-sensitive loop (LS1), and this first selector valve (V3) is also controlled the break-make in the second load-sensitive loop (LS2) and the first load-sensitive loop (LS1).
2. the multi-channel proportional flow divider valve group that is suitable for multiple variable pump systems according to claim 1, it is characterized in that: the proportional reversing valve that described first pressure piping (P1) is communicated with is two, promptly is respectively first proportional reversing valve (DV1) and second proportional reversing valve (DV2); Described first proportional reversing valve (DV1) control mouth is communicated with an import and a spool drive end of first recuperation valve (SC1) simultaneously, and this first recuperation valve (SC1) outlet and another spool drive end are communicated with the described first load-sensitive loop (LS1); Correspondingly, described second proportional reversing valve (DV2) control mouth is communicated with an import and a spool drive end of second recuperation valve (SC2) simultaneously, and this second recuperation valve (SC2) outlet and another spool drive end are communicated with the described first load-sensitive loop (LS1);
The proportional reversing valve that described second pressure piping (P2) is communicated with also is two, i.e. the 3rd proportional reversing valve (DV3) and the 4th proportional reversing valve (DV4); Described the 3rd proportional reversing valve (DV3) control mouth is communicated with an import and a spool drive end of the 3rd recuperation valve (SC3) simultaneously, and the 3rd recuperation valve (SC3) outlet and another spool drive end are communicated with the described second load-sensitive loop (LS2); Described the 4th proportional reversing valve (DV4) control mouth is communicated with an import and a spool drive end of the 4th recuperation valve (SC4) simultaneously, and the 4th recuperation valve (SC4) outlet and another spool drive end are communicated with the described second load-sensitive loop (LS2).
3. the multi-channel proportional flow divider valve group that is suitable for multiple variable pump systems according to claim 2, it is characterized in that: described first proportional reversing valve (DV1) is shaped on four control mouths, two of other three controls mouthful are communicated with simultaneously with another outlet of first recuperation valve (SC1), and the 4th controls mouth is communicated with described return line (T); Described first proportional reversing valve (DV1) is shaped on two delivery outlets, and these two delivery outlets are communicated with first group of working hole (A1, B1) respectively; Also be communicated with first level relief valve (PR1) on described first group of working hole (A1), correspondingly, also be communicated with second subprime relief valve (PR2) on described first group of working hole (B1), and the flow-off of this second subprime relief valve (PR2), first level relief valve (PR1) is communicated with described return line (T) all.
4. the multi-channel proportional flow divider valve group that is suitable for multiple variable pump systems according to claim 2, it is characterized in that: described second proportional reversing valve (DV2) is shaped on four control mouths, two of other three controls mouthful are communicated with simultaneously with another outlet of second recuperation valve (SC2), and the 4th controls mouth is communicated with described return line (T); Described second proportional reversing valve (DV2) is shaped on two delivery outlets, and these two delivery outlets are communicated with second group of working hole (A2, B2) respectively; Also be communicated with level relief valve (PR3) for the third time on described second group of working hole (A2), correspondingly, also be communicated with the 4th level relief valve (PR4) on described second group of working hole (B2), and the 4th level relief valve (PR4), for the third time the level relief valve (PR3) flow-off all be communicated with described return line (T).
5. according to claim 3 or the 4 described multi-channel proportional flow divider valve groups that are suitable for multiple variable pump systems, it is characterized in that: described first recuperation valve (SC1) spool drive end also is communicated with first shuttle valve (SV1) import, correspondingly, described second recuperation valve (SC2) spool drive end also is communicated with another import of first shuttle valve (SV1), and the central exit of this first shuttle valve (SV1) is communicated with the spool drive end of described second selector valve (V4); Also be provided with first one-way valve (DF1) between described first load-sensitive loop (LS1) and first pressure piping (P1).
6. the multi-channel proportional flow divider valve group that is suitable for multiple variable pump systems according to claim 2, it is characterized in that: described the 3rd proportional reversing valve (DV3) is shaped on four control mouths, two of other three controls mouthful are communicated with simultaneously with another outlet of the 3rd recuperation valve (SC3), and the 4th controls mouth is communicated with described return line (T); Described the 3rd proportional reversing valve (DV3) is shaped on two delivery outlets, and these two delivery outlets are communicated with the 3rd group of working hole (A3, B3) respectively; Also be communicated with the 6th level relief valve (PR6) on described the 3rd group of working hole (A3), correspondingly, also be communicated with the 5th level relief valve (PR5) on described the 3rd group of working hole (B3), and the flow-off of the 5th level relief valve (PR5), the 6th level relief valve (PR6) is communicated with described return line (T) all.
7. the multi-channel proportional flow divider valve group that is suitable for multiple variable pump systems according to claim 2, it is characterized in that: described the 4th proportional reversing valve (DV4) is shaped on four control mouths, two of other three controls mouthful are communicated with simultaneously with another outlet of the 4th recuperation valve (SC4), and the 4th controls mouth is communicated with described return line (T); Described the 4th proportional reversing valve (DV4) is shaped on two delivery outlets, and these two delivery outlets are communicated with the 4th group of working hole (A4, B4) respectively; Also be communicated with the 8th level relief valve (PR8) on described the 4th group of working hole (A4), correspondingly, also be communicated with the 7th level relief valve (PR7) on described the 4th group of working hole (B4), and the flow-off of the 7th level relief valve (PR7), the 8th level relief valve (PR8) is communicated with described return line (T) all.
8. according to claim 6 or the 7 described multi-channel proportional flow divider valve groups that are suitable for multiple variable pump systems, it is characterized in that: described the 7th level relief valve (PR7), the 8th level relief valve (PR8) are built-in with the repairing one-way valve; Described the 3rd recuperation valve (SC3) spool drive end also is communicated with second shuttle valve (SV2) import, correspondingly, described the 4th recuperation valve (SC4) spool drive end also is communicated with another import of second shuttle valve (SV2), and the central exit of this second shuttle valve (SV2) is communicated with a working hole of described second selector valve (V4); Also be provided with second one-way valve (DF2) between described second load-sensitive loop (LS2) and second pressure piping (P2).
9. the multi-channel proportional flow divider valve group that is suitable for multiple variable pump systems according to claim 2, it is characterized in that: described first relief valve (R1), the first three-way flow metered valve (PC1) and first one-way valve (DF1) all are installed on first pump side connection (1), and described first pump side connection (1) is shaped on the first remote control mouth (V1) and first pressure tap (MP1); The first return oil pressure valve (RB1) and the second return oil pressure valve (RB2) also have been installed in parallel on described first pump side connection (1), and the filler opening of this first return oil pressure valve (RB1) and the second return oil pressure valve (RB2) is communicated with described return line (T), and oil outlet corresponds to first group of return opening (T1, T2); Correspondingly, described second relief valve (R2), the second three-way flow metered valve (PC2) and second one-way valve (DF2) all are installed on second pump side connection (7), and described second pump side connection (7) is shaped on the second remote control mouth (V2) and second pressure tap (MP2); The 3rd return oil pressure valve (RB3) and the 4th return oil pressure valve (RB4) also have been installed in parallel on described second pump side connection (7), and the filler opening of the 3rd return oil pressure valve (RB3) and the 4th return oil pressure valve (RB4) is communicated with described return line (T), and oil outlet corresponds to second group of return opening (T3, T4).
10. the multi-channel proportional flow divider valve group that is suitable for multiple variable pump systems according to claim 2 is characterized in that: described first proportional reversing valve (DV1), first recuperation valve (SC1), first level relief valve (PR1) and second subprime relief valve (PR2) all are installed on second valve connection (2); Described second proportional reversing valve (DV2), second recuperation valve (SC2), level relief valve (PR3), the 4th level relief valve (PR4) and first shuttle valve (SV1) all are installed on the 3rd valve connection (3) for the third time; Described the 3rd proportional reversing valve (DV3), the 3rd recuperation valve (SC3), the 5th level relief valve (PR5), the 6th level relief valve (PR6) and second shuttle valve (SV2) all are installed on the 5th valve connection (5); Described the 4th proportional reversing valve (DV4), the 4th recuperation valve (SC4), the 7th level relief valve (PR7) and the 8th level relief valve (PR8) all are installed on the 6th valve connection (6); Between described the 5th valve connection (5) and the 3rd valve connection (3) also pad be provided with and switch connection (4), and described first pump side connection (1), second valve connection (2), the 3rd valve connection (3), switch connection (4), the 5th valve connection (5), the 6th valve connection (6) and second pump side connection (7) and join through bolt seal stack subsides successively;
Described first selector valve (V3), second selector valve (V4) are all equipped with switching connection (4); In the described switching connection (4) four safety valves (V5) are installed also, wherein the import of two safety valves (V5) all is communicated with the described first load-sensitive loop (LS1), correspondingly, the import of two other safety valve (V5) all is communicated with the described second load-sensitive loop (LS2), and the outlet of this safety valve (V5) all is communicated with described return line (T).
CN2009201234487U 2009-06-25 2009-06-25 Multi-channel proportional flow rate distributing valve group for various variable output pump systems Expired - Lifetime CN201461582U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101603551B (en) * 2009-06-25 2012-08-08 卢宇 Multi-channel proportional flow distribution valve bank applicable to various variable pump systems
CN103089729A (en) * 2012-12-29 2013-05-08 柳州柳工液压件有限公司 Quantified system load sensitive multi-way reversing valve
CN103671335A (en) * 2013-12-19 2014-03-26 杭叉集团股份有限公司 Load-sensitive electric proportional multi-loop valve
CN108698713A (en) * 2016-02-19 2018-10-23 费森尤斯卡比德国有限公司 Valve cell for the equipment for producing medical preparation
CN108730251A (en) * 2018-05-30 2018-11-02 重庆宝钢汽车钢材部件有限公司 Integrated speed-regulating hydraulic valve group
CN109441903A (en) * 2018-12-10 2019-03-08 中联重科股份有限公司 Load-sensitive multiple directional control valve

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101603551B (en) * 2009-06-25 2012-08-08 卢宇 Multi-channel proportional flow distribution valve bank applicable to various variable pump systems
CN103089729A (en) * 2012-12-29 2013-05-08 柳州柳工液压件有限公司 Quantified system load sensitive multi-way reversing valve
CN103089729B (en) * 2012-12-29 2015-09-02 柳州柳工液压件有限公司 Quantitative system load-sensitive multiple directional control valve
CN103671335A (en) * 2013-12-19 2014-03-26 杭叉集团股份有限公司 Load-sensitive electric proportional multi-loop valve
CN108698713A (en) * 2016-02-19 2018-10-23 费森尤斯卡比德国有限公司 Valve cell for the equipment for producing medical preparation
CN108730251A (en) * 2018-05-30 2018-11-02 重庆宝钢汽车钢材部件有限公司 Integrated speed-regulating hydraulic valve group
CN109441903A (en) * 2018-12-10 2019-03-08 中联重科股份有限公司 Load-sensitive multiple directional control valve

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