CN104019072A - Pilot type multiway valve system and hydraulic system - Google Patents
Pilot type multiway valve system and hydraulic system Download PDFInfo
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- CN104019072A CN104019072A CN201410257369.0A CN201410257369A CN104019072A CN 104019072 A CN104019072 A CN 104019072A CN 201410257369 A CN201410257369 A CN 201410257369A CN 104019072 A CN104019072 A CN 104019072A
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Abstract
The invention provides a pilot type multiway valve system and a hydraulic system. The multiway valve system comprises a first logic control valve, a first logic valve and a first flow control valve, wherein the first logic control valve comprises a first control end, a first main flow inlet end, a first auxiliary flow inlet end and a first flowing-out end; the first logic valve comprises a second control end, a second main flow inlet end and a second flowing-out end. The second control end is communicated with the first main flow inlet end, and the second main flow inlet end is communicated with the first auxiliary flow inlet end. The first flow control valve comprises a third control end, a third main flow inlet end and a third flowing-out end, wherein the third main flow inlet end is communicated with the second flowing-out end. The flow-controllable multiway valve system which is of a pilot type and has a maintaining function can be achieved through a simple structure, materials are saved, and faults are reduced.
Description
Technical field
The present invention relates to technical field of hydraulic, relate in particular to the hydraulic system of a kind of leading type multi-way valve system and this leading type multi-way valve system of use.
Background technique
Hydraulic system is to using the liquid such as fluid as working medium, utilizes the pressure of liquid the package unit of working by the operating hydraulically operated actuator of the annexes such as control valve.The quality of a hydraulic system depend on system rationality, system element performance quality, the aspects such as the pollution protection of system and processing.In hydraulic system, by power plant, drive liquid pump work that liquid pressure source is provided, by integrated package, hydrovalve etc., control the regulation and control of travel direction, pressure, flow, realize the various compulsory exercises of hydraulic system.
The advantage such as that hydraulic system has is lightweight, volume is little, motional inertia is little, reaction velocity is fast, and, the various elements of hydraulic system can arrange as required easily and flexibly, and therefore, hydraulic system is widely used in industrial manufacture, building and automation control area.
Should be noted that above the introduction of technical background is just carried out to clear, complete explanation for convenient to technological scheme of the present invention, and facilitate those skilled in the art's understanding to set forth.Can not only because of these schemes, in background technique of the present invention, partly carry out setting forth and thinking that technique scheme is conventionally known to one of skill in the art.
Summary of the invention
In hydraulic system, in the situation that realizing same function, the simple and little hydraulic control system of volume of project organization, is the trend of hydraulic system development.
The object of the embodiment of the present application is to provide a kind of leading type multi-way valve system and hydraulic system, can obtain leading type multi-way valve control system simple in structure, has both saved material, reduces again rate of fault.
For solving the problems of the technologies described above, a kind of leading type multi-way valve system that the embodiment of the present application provides is achieved in that
This leading type multi-way valve system comprises:
The first logic control valve, it comprises the first control end, the first main flow enters end, the first secondary flow enters end and the first outflow end, wherein, and when the pressure of described the first control end surpasses first threshold, described the first main flow enters end and is communicated with described the first outflow end, liquid enters end from described the first main flow and flows to described the first outflow end in described the first logic control valve, and when the pressure of described the first control end is less than described first threshold, described the first main flow enters end and enters to hold with described the first secondary flow and be communicated with;
The first logical valve, it comprises the second control end, the second main flow enters end and the second outflow end, wherein, described the second control end and described the first main flow enter end and are communicated with, and the second main flow enters end and enters to hold with described the first secondary flow and be communicated with, and, when the difference that enters end and the pressure of described the second control end when described the second main flow is greater than Second Threshold, liquid enters end from described the second main flow and flows to described the second outflow end in described the first logical valve;
First flow control valve, it comprises that the 3rd control end, the 3rd main flow enter end and the 3rd outflow end, wherein, described the 3rd main flow enters end and is communicated with described the second outflow end, and, when the pressure of described the 3rd control end is greater than the 3rd threshold value, liquid enters end from described the 3rd main flow and flows to described the 3rd outflow end in described first flow control valve.
A kind of hydraulic system that the embodiment of the present application provides is achieved in that
This hydraulic system comprises the leading type multi-way valve system described in hydraulic actuator and the embodiment of the present application, and wherein, described leading type multi-way valve system is controlled described hydraulic actuator motion.
The technological scheme being provided from above the embodiment of the present application, according to the application's technological scheme, can realize the flow-controllable multi-way valve system that leading type band keeps function with simple structure, has both saved material, reduces again fault.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, the accompanying drawing the following describes is only some embodiments that record in the application, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the composition schematic diagram of the leading type multi-way valve system of the embodiment of the present application 1;
Fig. 2 is the composition schematic diagram of the leading type multi-way valve system of the embodiment of the present application 2.
Embodiment
The embodiment of the present application provides a kind of leading type multi-way valve system and hydraulic system.
In order to make those skilled in the art person understand better the technological scheme in the application, below in conjunction with the accompanying drawing in the embodiment of the present application, technological scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only the application's part embodiment, rather than whole embodiments.Embodiment based in the application, those of ordinary skills, not making the every other embodiment who obtains under creative work prerequisite, should belong to the scope of protection of the invention.
Embodiment 1
The embodiment of the present application 1 provides a kind of leading type multi-way valve system, and Fig. 1 is the composition schematic diagram of the leading type multi-way valve system in embodiment 1, and as shown in Figure 1, leading type multi-way valve system 100 comprises:
The first logic control valve 1, it comprises the first control end C1, the first main flow enters to hold B1, the first secondary flow enters to hold D1 and the first outflow end A1, wherein, when the pressure of described the first control end C1 surpasses first threshold, described the first main flow enters to hold B1 to be communicated with described the first outflow end A1, liquid enters to hold B1 to flow to described the first outflow end A1 from described the first main flow in described the first logic control valve 1, when the pressure of described the first control end C1 is less than described first threshold, described the first main flow enters to hold B1 to enter to hold D1 to be communicated with described the first secondary flow;
The first logical valve 2, it comprises the second control end C2, the second main flow enters to hold B2 and the second outflow end A2, wherein, described the second control end C2 enters to hold B1 to be communicated with described the first main flow, and the second main flow enters to hold B2 to enter to hold D1 to be communicated with described the first secondary flow, and, when described the second main flow enters to hold the difference of the pressure of B2 and described the second control end C2 to be greater than Second Threshold, liquid enters to hold B2 to flow to described the second outflow end A2 from described the second main flow in described the first logical valve 2;
First flow control valve 3, it comprises that the 3rd control end C3, the 3rd main flow enter to hold B3 and the 3rd outflow end A3, wherein, described the 3rd main flow enters to hold B3 to be communicated with described the second outflow end A2, and, when the pressure of described the 3rd control end C3 is greater than the 3rd threshold value, liquid enters to hold B3 to flow to described the 3rd outflow end A3 from described the 3rd main flow in described first flow control valve 3.
In the embodiment of the present application, the liquid using in this leading type multi-way valve system can be fluid, mineral oil for example, but the application is not limited to this, can also be other liquid.
In the embodiment of the present application, the first logic control valve 1, the first logical valve 2 and first flow control valve 3 can have the structure that removable spool is set in cavity, pressure difference by removable spool both sides drives this removable spool to move to diverse location, thereby makes to form different connected states or blocking state between each end in the first logic control valve 1, the first logical valve 2 and first flow control valve 3.In addition, in the embodiment of the present application, one side of spool can linking springs or electromagnetic relay, by adjusting the elastic force of spring or the electromagnetic force of electromagnetic relay, adjust at least one in first threshold, Second Threshold and the 3rd threshold value, certainly, the embodiment of the present application is not limited to this, can also adopt other mode to adjust first threshold, Second Threshold and/or the 3rd threshold value.
In the present embodiment, each in the first logic control valve 1, the first logical valve 2 and first flow control valve 3 can be realized by single valve arrangement of the prior art, also can be realized by the combination of a plurality of valve arrangements, concrete implementation can be with reference to prior art, and the embodiment of the present application repeats no more.
In the embodiment of the present application, as shown in Figure 1, the first control end C1 and the 3rd control end C3 can be connected to identical pressure source, that is, and and pilot pressure source.Thus, the first control end C1 and the 3rd control end C3 are subject to identical pilot pressure Pia1, therefore, can simplify control logic.But the embodiment of the present application is not limited to this, also can, according to the needs of control logic, make the first control end C1 and the 3rd control end C3 be connected to different pressure sources.
In addition, in this application, the pressure of the pressure of the first control end C1 and the 3rd control end C3 can be air pressure, hydraulic pressure or by motor, electromagnetic force or the pressure that produces manually etc.
In the embodiment of the present application, when the pressure of the 3rd control end C3 is greater than the 3rd threshold value, thereby when liquid is flowed in first flow control valve 3, can make the spool of first flow control valve 3 and the opening area of valve body change with the pressure size of the 3rd control end C3, thus, can control from the 3rd main flow and enter to hold B3 to flow to the flow of the liquid of the 3rd outflow end by the pressure of the 3rd control end C3.
In addition, in the embodiment of the present application, the liquid flowing out from the first outflow end A1 can flow to the drain tap T of this leading type multi-way valve system 100, and by this drain tap, liquid is reclaimed.
Below, with reference to figure 1, the working procedure of the leading type multi-way valve system 100 of the embodiment of the present application 1 is described.
When pilot pressure Pia1 surpasses first threshold and the 3rd threshold value, under the effect of pilot pressure Pia1, the spool of the first logic control valve 1 is promoted to move to right, the first primary input end B1 is communicated with the first output terminals A 1, thereby first primary input end B1 and first output terminals A 1 of the second control end C2 of spring side that makes to be positioned at the first logical valve 2 by logic control valve 1 is communicated with drain tap T, now, the pressure of the second control end C2 levels off to 0;
In the situation that the second main flow enters to hold the pressure P 1 of B2 and the pressure difference of the second control end C2 to be greater than Second Threshold, logical valve 2 is opened, the spool of flow control valve 3 is promoted to move to right under the effect of pilot control Pia1 pressure simultaneously, make liquid enter to hold B2 to flow through first flow control valve 3 from the second main flow, and flow out the 3rd main outflow end A3, wherein, the uninterrupted passing through can be controlled by the size of pilot pressure Pia1.
When pilot pressure Pia1 is less than first threshold, the spool of the first logic control valve 1 is shifted left side onto under the effect of spring, the first primary input end B1 and the first secondary input end D1 are communicated with, thus, the the second control end C2 that is positioned at the spring side of the first logical valve 2 is communicated with the second primary input end B2 mouth by the first primary input end B1 and the first secondary input end D1, therefore, the total pressure of the spring side of the first logical valve 2 is B2 end pressure and spring pressure sum, all the time be greater than the first logical valve 2 without the pressure of spring side, , the difference of the pressure of the pressure of B2 end and C2 end is less than Second Threshold, therefore, the first logical valve 2 is in closed condition, oil circuit between B2 end and A2 end cuts off, play maintenance function.
In the embodiment of the present application, when pilot pressure Pia1 is greater than first threshold and the 3rd threshold value, can control from the second main flow and enter to hold B2 to flow to the fluid flow of the 3rd main outflow end A3 by the size of pilot pressure Pia1, when pilot pressure is less than first threshold, can cut off the second main flow enters to hold B2 to flow to the circulation path of the 3rd main outflow end A3, thereby maintenance effect, thus, can realize the flow-controllable multi-way valve system that leading type band keeps function with simple structure, both save material, reduced again fault.
Embodiment 2
The embodiment of the present application 2 provides a kind of leading type multi-way valve system, on the basis of embodiment 1 leading type multi-way valve system 100, has further increased new valve cell.
Fig. 2 is the composition schematic diagram of the leading type multi-way valve system in embodiment 2, and as shown in Figure 2, embodiment 2 leading type multi-way valve system 200, except comprising embodiment 1 leading type multi-way valve system 100, also comprises:
One-way valve 4, it comprises that the 4th main flow enters to hold B4 and the 4th outflow end A4, described the 4th outflow end A4 enters to hold B2 to be communicated with described the second main flow, and 4, described one-way valve allows liquid to enter to hold B4 to flow to described the 4th outflow end A4 from described the 4th main flow;
Second control valve 5, it comprises that the 5th control end C5, the 5th main flow enter to hold B5 and the 5th outflow end A5, wherein, described the 5th outflow end A5 enters to hold B4 to be communicated with described the 4th main flow, and, when the pressure of described the 5th control end C5 is greater than the 5th threshold value, liquid enters to hold B5 to flow to described the 5th outflow end A5 from described the 5th main flow in described second control valve C5;
The second logical valve 6, it comprises the 6th control end C6, the 6th main flow enters to hold B6 and the 6th outflow end A6, wherein, described the 6th outflow end A6 enters to hold B5 to be communicated with described the 5th main flow, when described the 6th main flow enters to hold the difference of the pressure of B6 and described the 6th control end C6 to be greater than the 6th threshold value, liquid enters to hold B6 to flow to described the 6th outflow end A6 from described the 6th main flow in described the second logical valve 6;
The 3rd logic control valve 7, it comprises the 7th control end C7, the 7th main flow enters to hold B7, the second secondary flow enters to hold D2 and the 7th outflow end A7, wherein, described the 7th main flow enters to hold B7 to be communicated with described the 6th control end C6, described the second secondary flow enters to hold D2 to enter to hold B6 to be communicated with described the 6th main flow, when the pressure of described the 7th control end C7 surpasses the 7th threshold value, described the 7th main flow enters to hold B7 to be communicated with described the 7th outflow end A7, liquid enters to hold B7 to flow to described the 7th outflow end A7 from described the 7th main flow in described the second logic control valve 7, when the pressure of described the 7th control end C7 is less than described the 7th threshold value, described the 7th main flow enters to hold B7 to enter to hold D2 to be communicated with described the second secondary flow.
In the embodiment of the present application, to the explanation of the second logic control valve 7, the second logical valve 6 and second control valve 5 can reference example 1 in explanation to the first logic control valve 1, the first logical valve 2 and first flow control valve 3, repeat no more herein.
In the embodiment of the present application, the structure of one-way valve 4 can be with reference to prior art, and the embodiment of the present application repeats no more.
In the embodiment of the present application, as shown in Figure 2, the 5th control end C5 and the 7th control end C7 can be connected to identical pressure source, that is, and and pilot pressure source.Thus, the 5th control end C5 and the 7th control end C7 can be subject to identical pilot pressure Pia2, therefore, can simplify control logic.But the embodiment of the present application is not limited to this, also can, according to the needs of control logic, make the 5th control end C5 and the 7th control end C7 be connected to different pressure sources.
In addition, in this application, the pressure of the pressure of the 5th control end C5 and the 7th control end C7 can be air pressure, hydraulic pressure or by motor, electromagnetic force or the pressure that produces manually etc.
In the embodiment of the present application, when the pressure of the 5th control end C5 is greater than the 5th threshold value, thereby when liquid is flowed in second control valve 5, can make the spool of second control valve 5 and the opening area of valve body change with the pressure size of the 5th control end C5, thus, can control from the 5th main flow and enter to hold B5 to flow to the flow of the liquid of the 5th outflow end A5 by the pressure of the 5th control end C5.
In the embodiment of the present application, described leading type multi-way valve system 200 can also comprise relief valve 8, described relief valve 8 comprises that the 8th main flow enters to hold B8 and the 8th outflow end A8, wherein, the 8th main flow enters to hold B8 to enter to hold B6 to be communicated with the 6th main flow, when described the 8th main flow enters to hold the fluid pressure of B8 to be greater than the 4th threshold value, liquid enters to hold B8 to flow to the 8th outflow end A8 from described the 8th main flow in described relief valve 8.In the present embodiment, also can regulate the 4th threshold value by spring or electromagnetic relay.About the structure of this relief valve 8, can be with reference to prior art, the embodiment of the present application repeats no more.
In addition, in the embodiment of the present application, from the 7th outflow end A7 and from the liquid of the 8th outflow end A8 outflow, can flow to the drain tap T of this leading type multi-way valve system 200, and by this drain tap, liquid be reclaimed.
Below, with reference to figure 2, the working procedure of the leading type multi-way valve system 200 of the embodiment of the present application 2 is described, wherein, about the explanation of the working procedure of leading type multi-way valve system 100, please refer to embodiment 1, the present embodiment no longer illustrates.
When pilot pressure Pia2 surpasses the 5th threshold value and the 7th threshold value, under the effect of pilot pressure Pia2, the spool of the second logic control valve 7 is promoted to move to left, the 7th primary input end B7 is communicated with the 7th output terminals A 7, thereby seven primary input end B7 and seven output terminals A 7 of the 6th control end C6 of spring side that makes to be positioned at the second logical valve 6 by logic control valve 7 is communicated with drain tap T, now, the pressure of the 6th control end C6 levels off to 0;
In the situation that the 6th main flow enters to hold the pressure P 2 of B6 and the pressure difference of the 6th control end C6 to be greater than the 6th threshold value, the second logical valve 6 is opened, the spool of second control valve 5 is promoted to move to left under the effect of pilot control Pia2 pressure simultaneously, make liquid enter to hold B5 to flow through second control valve 5 from the 5th main flow, and by one-way valve 4, flow to the second main flow and enter to hold B2, wherein, the uninterrupted passing through can be controlled by the size of pilot pressure Pia2; And when the 6th main flow enters to hold the pressure P 2 of B6 to surpass the 4th threshold value of relief valve 8 settings, relief valve 8 is opened, fluid flows to drain tap T by the 8th main flow entrance B8 and the 8th outflow opening A8 of relief valve 8.
When pilot pressure Pia2 is less than the 7th threshold value, the spool of the second logic control valve 7 is shifted right side onto under the effect of spring, the 7th primary input end B7 and the second secondary input end D2 are communicated with, thus, the 6th control end C6 that is positioned at the spring side of the second logical valve 6 is communicated with the 6th primary input end B6 by the 7th primary input end B7 and the second secondary input end D2, therefore, the total pressure of the spring side of the second logical valve 6 is B6 end pressure and spring pressure sum, all the time be greater than the second logical valve 6 without the pressure of spring side, , the difference of the pressure of the pressure of B6 end and C6 end is less than the 6th threshold value, therefore, the second logical valve 6 is in closed condition, oil circuit between B6 end and A6 end cuts off, play maintenance function.
In the embodiment of the present application, when pilot pressure Pia1 is greater than first threshold and the 3rd threshold value, can control from the second main flow and enter to hold B2 to flow to the fluid flow of the 3rd main outflow end A3 by the size of pilot pressure Pia1, when pilot pressure is less than first threshold, can play maintenance effect; And, when pilot pressure Pia2 is greater than the 5th threshold value and the 7th threshold value, can control from the 6th main flow and enter to hold B6 to flow to the fluid flow of the 5th main outflow end A5 by the size of pilot pressure Pia2, when pilot pressure is less than the 7th threshold value, can play maintenance effect thus, can realize the flow-controllable multi-way valve system that leading type band keeps function with simple structure, both save material, reduce again fault; And, by the control to the size of pilot pressure Pia1 and Pia2 and sequential, can make leading type multi-way valve system 200 complete more complicated control operation, thus, improved the flexibility of this leading type multi-way valve system 200.
Embodiment 3
The embodiment of the present application 3 provides a kind of hydraulic system, comprises the leading type multi-way valve system described in embodiment 1 or embodiment 2, and hydraulic actuator, and wherein, described leading type multi-way valve system is controlled described hydraulic actuator motion.
In the present embodiment, about the explanation of leading type multi-way valve system, please refer to embodiment 1 and embodiment 2, repeat no more herein.
In the application's embodiment, the 3rd outflow end A3 of described leading type multi-way valve system is communicated with the execution cavity of described hydraulic actuator, and, described in the liquid driven flowing out from the 3rd outflow end A3 of described leading type multi-way valve system, carry out the movable member motion in cavity, to control described hydraulic actuator motion.
In the present embodiment, the explanation about hydraulic actuator can, with reference to prior art, repeat no more herein.
According to the application's embodiment 3, can, with simple structure control hydraulic actuator, thus, simplify hydraulic system; And, can the driving force of regulating and controlling to hydraulic actuator, and can make this hydraulic system possess maintenance function.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, between each embodiment identical similar part mutually referring to, each embodiment stresses is the difference with other embodiments.Especially, for system embodiment, because it is substantially similar in appearance to embodiment of the method, so description is fairly simple, relevant part is referring to the part explanation of embodiment of the method.
Invention has been described for the concrete mode of execution of above combination, but it will be apparent to those skilled in the art that these descriptions are all exemplary, is not limiting the scope of the invention.Those skilled in the art can make various variants and modifications to the present invention according to spirit of the present invention and principle, and these variants and modifications also within the scope of the invention.
Claims (10)
1. a leading type multi-way valve system, is characterized in that, this leading type multi-way valve system comprises:
The first logic control valve, it comprises the first control end, the first main flow enters end, the first secondary flow enters end and the first outflow end, wherein, and when the pressure of described the first control end surpasses first threshold, described the first main flow enters end and is communicated with described the first outflow end, liquid enters end from described the first main flow and flows to described the first outflow end in described the first logic control valve, and when the pressure of described the first control end is less than described first threshold, described the first main flow enters end and enters to hold with described the first secondary flow and be communicated with;
The first logical valve, it comprises the second control end, the second main flow enters end and the second outflow end, wherein, described the second control end and described the first main flow enter end and are communicated with, and the second main flow enters end and enters to hold with described the first secondary flow and be communicated with, and, when the difference that enters end and the pressure of described the second control end when described the second main flow is greater than Second Threshold, liquid enters end from described the second main flow and flows to described the second outflow end in described the first logical valve;
First flow control valve, it comprises that the 3rd control end, the 3rd main flow enter end and the 3rd outflow end, wherein, described the 3rd main flow enters end and is communicated with described the second outflow end, and, when the pressure of described the 3rd control end is greater than the 3rd threshold value, liquid enters end from described the 3rd main flow and flows to described the 3rd outflow end in described first flow control valve.
2. leading type multi-way valve system as claimed in claim 1, is characterized in that, this leading type multi-way valve system also comprises:
One-way valve, it comprises that the 4th main flow enters end and the 4th outflow end, described the 4th outflow end enters end with described the second main flow and is communicated with, and described one-way valve only allows liquid to enter end from described the 4th main flow and flows to described the 4th outflow end;
Second control valve, it comprises that the 5th control end, the 5th main flow enter end and the 5th outflow end, wherein, described the 5th outflow end enters end with described the 4th main flow and is communicated with, and, when the pressure of described the 5th control end is greater than the 5th threshold value, liquid enters end from described the 5th main flow and flows to described the 5th outflow end in described second control valve;
The second logical valve, it comprises the 6th control end, the 6th main flow enters end and the 6th outflow end, wherein, described the 6th outflow end enters end with described the 5th main flow and is communicated with, when the difference that described the 6th main flow enters end and the pressure of described the 6th control end is greater than the 6th threshold value, liquid enters end from described the 6th main flow and flows to described the 6th outflow end in described the second logical valve;
The 3rd logic control valve, it comprises the 7th control end, the 7th main flow enters end, the second secondary flow enters end and the 7th outflow end, wherein, described the 7th main flow enters end and is communicated with described the 6th control end, described the second secondary flow enters end and enters to hold with described the 6th main flow and be communicated with, when the pressure of described the 7th control end surpasses the 7th threshold value, described the 7th main flow enters end and is communicated with described the 7th outflow end, liquid enters end from described the 7th main flow and flows to described the 7th outflow end in described the second logic control valve, when the pressure of described the 7th control end is less than described the 7th threshold value, described the 7th main flow enters end and enters to hold with described the second secondary flow and be communicated with.
3. leading type multi-way valve system as claimed in claim 1, is characterized in that, the pressure of the pressure of described the first control end and described the 3rd control end equates.
4. leading type multi-way valve system as claimed in claim 2, is characterized in that, the pressure of the pressure of described the 5th control end and described the 7th control end equates.
5. leading type multi-way valve system as claimed in claim 1, is characterized in that, when liquid flows in described first flow control valve, the pressure of described the 3rd control end is controlled the flow of liquid.
6. leading type multi-way valve system as claimed in claim 2, is characterized in that, when liquid flows in described second control valve, the pressure of described the 5th control end is controlled the flow of liquid.
7. leading type multi-way valve system as claimed in claim 2, it is characterized in that, described leading type multi-way valve system also comprises relief valve, described relief valve comprises that the 8th main flow enters end and the 8th outflow end, wherein, the 8th main flow enters end and enters end with the 6th main flow and is communicated with, and when the fluid pressure that enters to hold when described the 8th main flow is greater than the 4th threshold value, liquid enters to hold from described the 8th main flow and flows to the 8th outflow end in described relief valve.
8. leading type multi-way valve system as claimed in claim 7, is characterized in that, in described leading type multi-way valve system, by spring or electromagnetic relay, regulates at least one in described first threshold to the seven threshold values.
9. a hydraulic system, comprises hydraulic actuator and the leading type multi-way valve system as described in any one in claim 1-8, and wherein, described leading type multi-way valve system is controlled described hydraulic actuator motion.
10. hydraulic system as claimed in claim 9, wherein,
The 3rd outflow end of described leading type multi-way valve system is communicated with the execution cavity of described hydraulic actuator, and, described in the liquid driven flowing out from the 3rd outflow end of described leading type multi-way valve system, carry out the movable member motion in cavity, to control described hydraulic actuator motion.
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| CN201410257369.0A CN104019072A (en) | 2014-06-11 | 2014-06-11 | Pilot type multiway valve system and hydraulic system |
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| CN201410257369.0A CN104019072A (en) | 2014-06-11 | 2014-06-11 | Pilot type multiway valve system and hydraulic system |
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Application publication date: 20140903 |
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