CN202628633U - Hydraulic system applied in engineering machinery and communicating valve set thereof - Google Patents
Hydraulic system applied in engineering machinery and communicating valve set thereof Download PDFInfo
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- CN202628633U CN202628633U CN 201120530810 CN201120530810U CN202628633U CN 202628633 U CN202628633 U CN 202628633U CN 201120530810 CN201120530810 CN 201120530810 CN 201120530810 U CN201120530810 U CN 201120530810U CN 202628633 U CN202628633 U CN 202628633U
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Abstract
The utility model discloses a hydraulic system applied in engineering machinery and a communicating valve set thereof. The communicating valve set is arranged on a rodless chamber of a main cylinder of the hydraulic system. The main cylinder comprises a first rodless chamber and a second rodless chamber. The communicating valve set comprises a valve body having a chamber defined therein; and a logical valve insert core arranged inside the chamber and having a first passage, a second passage and a control passage respectively arranged on the bottom, the side wall and the top. One of the first passage and the second passage is communicated with the first rodless chamber while the other is communicated with the second rodless chamber. The control passage is connected with the control channel of an integrated valve set. The communicating valve set further comprises a logical valve cover plate which is arranged on the surface of the valve body and corresponding to the logical valve insert core. The communicating valve set provided in the utility model has the advantages of small volume, high integration level, simple structure and low cost.
Description
Technical field
The utility model relates to the engineering machinery design field, relates in particular to a kind of hydraulic system and connecting valve group thereof that is used for engineering machinery.
Background technique
The hydraulic system that present merchant's mixing device is used is the electro-hydraulic reversing valve of 32 latus rectums (DN32) and accomplishes the master cylinder switching-over, and the electro-hydraulic reversing valve of 16 latus rectums is accomplished the switching-over of oscillating oil cylinder, and the high low pressure of automatically controlled high low pressure switching valve (DN32) completion pumping system switches.
Each function module dispersion, space use size big in this traditional system, and system layout is complicated.Simultaneously, the spool-type valves through-current capability of using in the tradition is little, accuracy of manufacturing is high, the spool size is big, turn around time is long, reversing impact is big, and along with the development trend of the big flow of merchant's mixing device system high pressure, the drawback of this system is also more and more obvious.
The model utility content
The utility model is intended to solve at least one of technical problem that exists in the existing technology.For this reason, the utility model purpose is to propose a kind of connecting valve group that is used for construction machinery hydraulic system.
Another purpose of the utility model is to propose a kind of hydraulic system with above-mentioned connecting valve group.
The connecting valve group that is used for construction machinery hydraulic system according to the utility model first aspect; Be located on the master cylinder rodless cavity of said hydraulic system; Said master cylinder comprises first and second rodless cavities, and said connecting valve group comprises: valve body limits chamber in the said valve body; The logical valve lock pin; Said logical valve lock pin is located in the said chamber; And said logical valve lock pin has first path that is located at its bottom, the alternate path that is located at its sidewall and in the control access at top; In wherein said first path and the alternate path one of them is communicated with said first rodless cavity and another is communicated with said second rodless cavity, and said control access links to each other with the control channel of said integrated valve group; With the logical valve cover plate, said logical valve cover plate is located on the surface of said valve body and is corresponding with said logical valve lock pin.
According to the connecting valve group of the utility model, volume is little, and level of integration is high, and cost simple in structure is low.
Alternatively, said first path is communicated with said first rodless cavity, and said alternate path is communicated with said second rodless cavity.
The hydraulic system that is used for engineering machinery according to the utility model second aspect; Comprise: master cylinder; Be divided into rod chamber and rodless cavity through piston in the said master cylinder, said rod chamber comprises first and second rod chambers, and said rodless cavity comprises first and second rodless cavities; Oscillating oil cylinder; The pump group, said pump group provides power oil to system, and said pump group comprises main pump, constant pressure pump and gear pump; The integrated valve group, said integrated valve group comprises: body, said body are located at said master cylinder top, and are formed with control channel in the said body; A plurality of cartridge valve assemblies, thus said a plurality of cartridge valve assembly is integrated on the said body and link to each other with said many oil pipe roads respectively and select the high pressure pumping of pumping system and the switching-over of low pressure pumping, high low pressure pumping switching and oscillating oil cylinder with the break-make of controlling said oil pipe road; Constant pressure pump outlet valve group, said constant pressure pump outlet valve group is connected to protect said constant pressure pump etc. with said constant pressure pump; The connecting valve group that is used for construction machinery hydraulic system according to claim 1 and 2; Said connecting valve group is located on the said rodless cavity; Said connecting valve group is configured to said first and second rodless cavities sealing when said pumping system is the high pressure pumping, and said pumping system when being the low pressure pumping said first and second rodless cavities be communicated with; Move back the concrete solenoid valve; And accumulator, said accumulator be connected to said constant pressure pump outlet valve group when absorbing the oscillating oil cylinder switching-over hydraulic shock and can be used as the interim oil sources of oscillating oil cylinder when commutating fast.
The hydraulic system that is used for engineering machinery according to the utility model; Through the duty valve piece being integrated with the master cylinder switching-over that realizes pumping system and high low pressure pumping switching etc.; The electro-hydraulic reversing valve of simultaneously distribution system being used, one-way valve etc. are integrated on the duty valve piece, and volume is little, and level of integration is high; System layout is simple and clear; Overcome the weakness that big latus rectum spool-type valves through-current capability is little, accuracy of manufacturing is high, the spool size is big, turn around time is long, reversing impact is big thus, be particularly suitable for discussing vehicle structure compactness, the characteristics that the pressure high flow capacity is big of mixing.
Additional aspect of the utility model and advantage part in the following description provide, and part will become obviously from the following description, or recognize through the practice of the utility model.
Description of drawings
Above-mentioned and/or additional aspect of the utility model and advantage obviously with are easily understood becoming embodiment's the description from combining figs, wherein:
Fig. 1 is the schematic representation that has according to the hydraulic system that is used for engineering machinery of the utility model second aspect;
Fig. 2 is the enlarged diagram that Fig. 1 centre circle shows I portion;
Fig. 3 is the principle schematic of the hydraulic system shown in Fig. 1;
Fig. 4 is any schematic representation in first to the tenth lock pin in the group of integrated valve shown in Fig. 3;
Fig. 5 is the plan view of the integrated valve group shown in Fig. 2;
Fig. 6 is the left view of the integrated valve group shown in Fig. 2;
Fig. 7 is the right elevation of the integrated valve group shown in Fig. 2;
Fig. 8 is the plan view of the integrated valve group shown in Fig. 2;
Fig. 9 is the worm's eye view of the integrated valve group shown in Fig. 2;
Figure 10 is the schematic representation according to the connecting valve group of the utility model;
Figure 11 is the fundamental diagram of the hydraulic system shown in Fig. 1, and wherein pumping system is in the initialization state;
Figure 12 is the fundamental diagram of the hydraulic system shown in Fig. 1, and wherein pumping system is in high pressure pumping state, the second rodless cavity oil-feed and the first rodless cavity oil return;
Figure 13 is the fundamental diagram of the hydraulic system shown in Fig. 1, and wherein pumping system is in high pressure pumping state, the first rodless cavity oil-feed and the second rodless cavity oil return;
Figure 14 is the fundamental diagram of the hydraulic system shown in Fig. 1, and wherein pumping system is in low pressure pumping state, the second rod chamber oil-feed and the first rod chamber oil return; And
Figure 15 is the fundamental diagram of the hydraulic system shown in Fig. 1, and wherein pumping system is in low pressure pumping state, the first rod chamber oil-feed and the second rod chamber oil return.
Reference character:
01.1-0.1.4,02.1-02.4 first to fourth lock pin and first to fourth cover plate;
01.5-01.8,02.5-02.8 the 5th to the 8th lock pin lock pin and the 5th to the 8th cover plate;
01.9,02.9 the 9th lock pin and the 9th cover plate;
03.1 high pressure pumping electricity consumption magnetic selector valve;
03.2 low pressure pumping electricity consumption magnetic selector valve;
03.3 main pump solenoid directional control valve;
04.1,04.2 one-way valve;
05 high low pressure switches uses solenoid directional control valve;
06,07 the tenth lock pin and cover plate;
08 accumulator energy storage Solenoid ball valve;
09 distribution system is used relief valve;
10 distribution systems are used electro-hydraulic reversing valve;
11 move back the concrete Solenoid ball valve;
13.1,13.2,13.3,13.4,13.5,13.6 pressure measuring tie-ins;
14.1-14.2 pressure gauge line;
15.1-15.2 pressure gauge
16 one-way valves;
420, the logical valve lock pin of 430 connecting valve groups and logical valve cover plate;
600 accumulators;
PA, PB tilt cylinder oil inlet pipe
Embodiment
Describe the embodiment of the utility model below in detail, said embodiment's example is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment who is described with reference to the drawings below, only be used to explain the utility model, and can not be interpreted as restriction the utility model.
In the description of the utility model; It will be appreciated that; The orientation of indications such as term " " center ", " vertically ", " laterally ", " on ", D score, " preceding ", " back ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward " or position relation are for based on orientation shown in the drawings or position relation; only be to describe with simplifying for the ease of describing the utility model; rather than the device or the element of indication or hint indication must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction to the utility model.In addition, term " first ", " second " only are used to describe purpose, and can not be interpreted as indication or hint relative importance.In addition, in the description of the utility model, except as otherwise noted, the implication of " a plurality of " is two or more.
In the description of the utility model, need to prove that only if clear and definite regulation and qualification are arranged in addition, term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be to be fixedly connected, also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can link to each other indirectly through intermediary, can be the connection of two element internals.For those of ordinary skill in the art, can concrete condition understand the concrete implication of above-mentioned term in the utility model.
At first the hydraulic system that is used for engineering machinery according to the connecting valve group of the utility model is described below with reference to figure 1-Figure 15.
As depicted in figs. 1 and 2, the hydraulic system according to the utility model comprises: master cylinder 100, oscillating oil cylinder, pump group, integrated valve group 200, constant pressure pump outlet valve group 300, connecting valve group 400, move back concrete solenoid valve 500 and accumulator 600.
As depicted in figs. 1 and 2; Be divided into rod chamber and rodless cavity through piston in the master cylinder 100; Rod chamber comprises first rod chamber 110 and second rod chamber 120; Rodless cavity comprises first rodless cavity 130 and second rodless cavity 140, and wherein first rod chamber 110 is through the first rod chamber oil inlet pipe A12 fuel feeding, and second rod chamber 120 is through the second rod chamber oil inlet pipe B12 fuel feeding; First rodless cavity 130 is through the first rodless cavity oil inlet pipe A11 fuel feeding, and second rodless cavity 140 is through the second rodless cavity oil inlet pipe B11 fuel feeding.
The pump group is that system provides pressure oil and pump group to comprise main pump, constant pressure pump and gear pump (scheming not shown).
Constant pressure pump outlet valve group 300 is connected with constant pressure pump.Constant pressure pump outlet valve group 300 comprises the valve piece and is integrated in embedded one-way valve, relief valve and the Solenoid ball valve on the valve piece, can realize the energy storage and the off-load of hydraulic system, and prevents that fluid from flowing backwards, the protection constant pressure pump; Safety protection function makes system works pressure be no more than setting value.
Connecting valve group 400 is located on the rodless cavity, and connecting valve group 400 is configured to when the pump group is the high pressure pumping first rodless cavity 130 and 140 sealings of second rodless cavity, and pump group first rodless cavity 130 and 140 connections of second rodless cavity when being the low pressure pumping.
The oil inlet pipe M that moves back concrete solenoid valve 500 links to each other with MP2 outlet on the constant pressure pump outlet valve group 300.Move back concrete solenoid valve 500 and can prevent that the accident of master cylinder small piston from pulling out.When keeping in repair like this, open and move back concrete solenoid valve 500, can piston be pulled out from master cylinder.
The hydraulic system that is used for engineering machinery according to the utility model; Through the duty valve piece being integrated with the master cylinder switching-over that realizes pumping system and high low pressure pumping switching etc.; The electro-hydraulic reversing valve of simultaneously distribution system being used, one-way valve etc. are integrated on the duty valve piece, and volume is little, and level of integration is high; System layout is simple and clear; Overcome the weakness that big latus rectum spool-type valves through-current capability is little, accuracy of manufacturing is high, the spool size is big, turn around time is long, reversing impact is big thus, be particularly suitable for discussing vehicle structure compactness, the characteristics that the pressure high flow capacity is big of mixing.
In an embodiment of the utility model; A plurality of cartridge valve assemblies comprise: first to the 9th lock pin 01.1-01.9 and first to the 9th cover plate 02.1-02.9; As shown in Figure 3; First to the 9th lock pin 01.1-01.9 is integrated in the body 210; First to the 9th cover plate 02.1-02.9 is located on the surface of body 210 and is corresponding one by one with first to the 9th lock pin 01.1-01.9 respectively, and wherein first to fourth lock pin 01.1-01.4 is used for the low pressure pumping and the 5th to the 8th lock pin 01.5-01.8 is used for the high pressure pumping, and the 9th lock pin 01.9 is used to control the break-make of rod chamber.
Further; Integrated valve group 200 comprises main pump electromagnetic relief valve 230; Main pump electromagnetic relief valve 230 is integrated on the body 210; And comprise that the tenth lock pin 06 and the tenth cover plate 07, the ten lock pin are integrated in the body 210, the tenth cover plate is located on the surface of body 210 and is corresponding one by one with the tenth lock pin 06 respectively.
As shown in Figure 3; In the further embodiment of the utility model, integrated valve group 200 also can integrally be provided with: be used for main pump boost with the main pump solenoid directional control valve 03.3 of off-load, can provide the control oil of elevated pressures first one-way valve 04.1 and second one-way valve 04.2, be used for the electro-hydraulic reversing valve 10 of distribution system and be used to realize that high pressure pumping solenoid directional control valve 03.1, low pressure pumping solenoid directional control valve 03.2, the high low pressure of pumping system work switch with selector valve 05.
Particularly; As shown in Figure 4, each in first to the tenth lock pin includes: valve pocket 221, spool 222, door 223 and spring 224, wherein; Valve pocket 221 inside limit the columniform chamber coaxial with it; The bottom of chamber and side are formed with the first working connection port and the second working connection port respectively, and wherein the first working connection port connects first chamber, and the first working connection port connects second chamber; Clear in order to describe, first chamber and second chamber are indicated by A chamber and B chamber respectively.Spool 222 is located in the chamber and the inner core chamber that limits open-top.Door 223 is located at valve pocket 221 tops and is provided with the control oil channel port X that runs through it along the vertical direction, and control oil channel port X is suitable for connecting control oil channel to control the connection of the first working connection port and the second working connection port.Spring 224 is located in the core chamber and the upper end props up door 223.That is to say that spool 222 is controlled in the valve pocket 221 by control oil channel port X and moves, make A chamber and B chamber to be communicated with thus through moving of spool 222.And wherein the cracking pressure of spool 222 is determined by spring 224.
It should be noted that those skilled in the art are appreciated that " cartridge valve " mentioned in the utility model is identical with the structure of " logical valve ", just adopt different term descriptions in order to describe clear.
In some embodiments of the utility model, shown in Fig. 5-Fig. 9, first to the tenth lock pin is connected by following structure:
First, second communicates with the first working connection port of the 9th lock pin 01.1,01.2,01.9 and is communicated with the second rod chamber oil inlet pipe B 12; That is to say that the A chamber of first lock pin 01.1, second lock pin 01.2 and the 9th lock pin 01.9 communicates with each other and all is communicated with second rod chamber 120.
The first working connection port of third and fourth lock pin 01.3,01.4 communicates and communicates with the second working connection port and the first rod chamber oil inlet pipe A12 of the 9th lock pin 01.9; That is to say that the A chamber of the 3rd lock pin 01.3 and the 4th lock pin 01.4 communicates with each other and all communicates with first rod chamber 110.
The first working connection port of the 5th and the 6th lock pin 01.5,01.6 communicates and communicates with the second rodless cavity oil inlet pipe B11, that is to say, the A chamber of the 5th lock pin 01.5 and the 6th lock pin 01.6 communicates with each other and all communicates with second rodless cavity 140.
The first working connection port of the 7th and the 8th lock pin 01.7,01.8 communicates and is communicated with the first rodless cavity oil inlet pipe A11, that is to say, the A chamber of the 7th lock pin 01.7 and the 8th lock pin 01.8 communicates with each other and all is communicated with first rodless cavity 130.
The first, the second working connection port of the 3rd, the 5th and the 7th lock pin communicates with the oil outlet of main pump, that is to say, the B chamber of first lock pin 01.1, the 3rd lock pin 01.3, the 5th lock pin 01.5 and the 7th lock pin 01.7 is communicated with the oil outlet P1 of main pump.The second, the second working connection port of the 4th, the 6th, the 8th lock pin communicates with the oil return inlet T 1 of integrated valve group; That is to say that the B chamber of second lock pin 01.2, the 4th lock pin 01.4, the 6th lock pin 01.6 and the 8th lock pin 01.8 communicates with the oil return inlet T 1 of integrated valve group.
The first working connection port of the tenth lock pin 06 communicates with the oil inlet P 1 of main pump; And the second working connection port communicates with the oil return inlet T 1 of integrated valve group; That is to say that the A chamber of the tenth lock pin 06 communicates with the oil outlet P1 of main pump, and the B chamber communicates with the oil return inlet T 1 of integrated valve group.
First to the tenth lock pin 01.1-01.9,06 control oil channel port X all with body 210 in control channel L link to each other; Can control the break-make in the A chamber and the B chamber of corresponding lock pin thus respectively through control oil channel port X; Thereby control main pump under the corresponding situation oil outlet P1, integrated valve group oil return inlet T 1 respectively and the break-make between first rodless cavity 130, second rodless cavity 140, first rod chamber 110 or second rod chamber 120, and then the switching of high pressure pumping, low pressure pumping and the high low pressure pumping of control pumping system.In the embodiment of the utility model, the control oil in the control channel L is got back in the fuel tank through controlling oily return tube Y.
Shown in figure 10; Connecting valve group 400 according to the utility model comprises: valve body 410, logical valve lock pin 420 and logical valve cover plate 430; Limit chamber in the valve body 410; Logical valve lock pin 420 is located in the chamber, and logical valve lock pin 420 has first path 421 that is located at its bottom, is located at the alternate path 422 of its sidewall and in the control access 423 at top, and wherein one of them in first path 421 and the alternate path 422 is communicated with first rodless cavity 130 and another is communicated with second rodless cavity 140; Control access 423 links to each other with the oily ABX11 of control, links to each other with the control channel L of integrated valve group 200 and control oily ABX11.Logical valve cover plate 430 is located on the surface of valve body 410 and is corresponding with logical valve lock pin 420.Alternatively, first path 421 is communicated with first rodless cavity 130 through the first rodless cavity oil inlet pipe A11, and alternate path 422 is communicated with second rodless cavity 140 through the second rodless cavity oil inlet pipe B11.
Particularly; When the high pressure pumping, under the effect of the oily ABX11 of control, first path 421 and alternate path 422 sealings in the logical valve lock pin 420; Promptly seal between A chamber among the figure and the B chamber, the first rodless cavity oil inlet pipe A11 and the second rodless cavity oil inlet pipe B11 are obstructed thus.When the low pressure pumping, control the logical oil of oily ABX11, first path 421 is communicated with alternate path 422 in the logical valve lock pin 420, promptly is communicated with between the A chamber among the figure and the B chamber, and the first rodless cavity oil inlet pipe A11 is communicated with the second rodless cavity oil inlet pipe B11.
Below with reference to the working principle of Figure 11-Figure 16 description according to the hydraulic system of the connecting valve group of the utility model, wherein DT1-DT7 is an electromagnet among Figure 11-Figure 16.For describing conveniently, in the explanation below, first to the 9th lock pin will be abbreviated as label, i.e. 01.1-01.9.
Shown in figure 11 is the initialization state of hydraulic system, DT1 wherein, and DT2, DT3, DT4, DT5, DT6, DT7 is no electric circuit, and first to the 9th lock pin 01.1-01.9 and lock pin 420 all seal, and open pump and do not have the pressure off-load.
Shown in figure 12, pumping system is in high pressure pumping state.
The DT1 energising, system boosts, and remains "on" position.DT2 switches on all the time, the DT3 outage, and then 420 sealings of the lock pin in the connecting valve group 400,01.9 opens, at this moment, first rodless cavity 130 and 140 sealings of second rodless cavity, and first rod chamber 110 and 120 connections of second rod chamber.
DT6, DT7 cuts off the power supply all the time, the 01.1--01.4 sealing, DT4, DT5 energising-outage conversion, this moment, master cylinder was in high pressure pumping working state.
The DT4 energising; 01.6,01.7 sealing, 01.5,01.8 opens, main pump comes oil to open lock pin 01.5 to get in second rodless cavity 140; Through first rod chamber 110 and second rod chamber 120, hydraulic oil is got back in the fuel tank through oil return inlet T 1 through 01.8 from first rodless cavity 130 at last.
Shown in figure 13, pumping system is in high pressure pumping state.
The DT1 energising, system boosts, and remains "on" position.DT2 switches on all the time, DT3 outage, and then 420 sealings of the lock pin in the connecting valve group 400,01.9 opens, at this moment, first rodless cavity 130 and 140 sealings of second rodless cavity, and first rod chamber 110 passes through 01.9 connection with second rod chamber 120.
DT6, DT7 cuts off the power supply all the time, the 01.1--01.4 sealing, DT4, DT5 energising-outage conversion, this moment, master cylinder was in high pressure pumping working state.The DT5 energising; 01.5,01.8 sealing, 01.6,01.7 opens, main pump comes oil to open lock pin 01.7 to get in first rodless cavity 130; Through first rod chamber 110 and second rod chamber 120, hydraulic oil is got back in the fuel tank through oil return inlet T 1 through 01.6 from second rodless cavity 140 at last.
Shown in figure 14, pumping system is in low pressure pumping state.
The DT1 energising, system boosts, and remains "on" position.DT3 switches on all the time, DT2 outage, then 01.9 sealing, the lock pin 420 in the connecting valve group 400 is opened, this moment first rod chamber 110 with 120 sealings of second rod chamber, and first rodless cavity 130 passes through lock pin 420 with second rodless cavity 140 and seals.
DT4, DT5 cuts off the power supply all the time, the 01.5--01.8 sealing, DT6, DT7 energising-outage conversion, this moment, oil cylinder was in low pressure pumping working state.The DT6 energising; 01.2,01.3 sealing, 01.101.4 opens, main pump comes oil to open lock pin 01.1 to get in second rod chamber 120; Through first rodless cavity 130 and second rodless cavity 140, hydraulic oil passes through in oil return inlet T 1 oil sump tank through 01.4 from first rod chamber 110 at last.
Shown in figure 15, pumping system is in low pressure pumping state.
The DT1 energising, system boosts, and remains "on" position.DT3 switches on all the time, DT2 outage, then 01.9 sealing, the lock pin 420 in the connecting valve group 400 is opened, this moment first rod chamber 110 with 120 sealings of second rod chamber, and first rodless cavity 130 passes through lock pin 420 with second rodless cavity 140 and seals.
DT4, DT5 cuts off the power supply all the time, the 01.5--01.8 sealing, DT6, DT7 energising-outage conversion, this moment, oil cylinder was in low pressure pumping working state.The DT7 energising; 01.1,01.4 sealing, 01.2,01.3 opens, main pump comes oil to open lock pin 01.3 to get in first rod chamber 110; Through first rodless cavity 130 and second rodless cavity 140, hydraulic oil passes through oil return inlet T 1 oil sump tank through 01.2 from second rod chamber 120 at last.
According to the hydraulic system that is used for engineering machinery of the utility model, owing to adopted cartridge valve, make to leak to only occur between control oil channel port X and the B chamber, so the system leak amount is little, total leakage rate approximately is 10% of traditional plate valve.In addition, can control the time of opening and closing as required, this meaning can be optimized control to hydraulic oil mobile; And because not covering amount of cartridge valve, so particularly rapid to the pressure peak reaction, can make that thus the pressure peak of hydraulic oil is low in the system; Simultaneously; Because the quality of cartridge valve is less, and not covering amount in the stroke, so the time of opening and closing is shorter; Promptly obtained higher switch speed, its turn around time shorten to traditional plate valve turn around time 1/3rd.The 3rd, through avoiding pressure peak, can eliminate a maximum reason that causes noise.Because the volume of control loop is less,, therefore, make according to the noise of the hydraulic system of the utility model low so the emission area of vibrations is also less.At last, the maintenance of native system and service are convenient.When breaking down, it is just enough in most cases only to need to change discrete component, and need not change whole valve.Make in this way, can reduce the cost of overhaul of whole system.And the quantity of primary element is few, and the stock is simple for the meaning acknowledgment copy, and administration expenses can reduce significantly.
For example constitute master cylinder, oscillating oil cylinder, fuel tank and pumping system etc. and operation all is known according to other of the hydraulic system of the utility model for those of ordinary skills, be not described in detail here.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means the concrete characteristic, structure, material or the characteristics that combine this embodiment or example to describe and is contained among at least one embodiment or example of the utility model.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete characteristic, structure, material or the characteristics of description can combine with suitable manner in any one or more embodiments or example.
Although illustrated and described the embodiment of the utility model; Those having ordinary skill in the art will appreciate that: under the situation of principle that does not break away from the utility model and aim, can carry out multiple variation, modification, replacement and modification to these embodiments, the scope of the utility model is limited claim and equivalent thereof.
Claims (3)
1. a connecting valve group that is used for construction machinery hydraulic system is characterized in that, said connecting valve group is located on the master cylinder rodless cavity of said hydraulic system, and said master cylinder comprises first and second rodless cavities, and said connecting valve group comprises:
Valve body limits chamber in the said valve body;
The logical valve lock pin; Said logical valve lock pin is located in the said chamber; And said logical valve lock pin has first path that is located at its bottom, the alternate path that is located at its sidewall and in the control access at top; In wherein said first path and the alternate path one of them is communicated with said first rodless cavity and another is communicated with said second rodless cavity, and said control access links to each other with the control channel of said integrated valve group; With
Logical valve cover plate, said logical valve cover plate are located on the surface of said valve body and are corresponding with said logical valve lock pin.
2. the connecting valve group that is used for construction machinery hydraulic system according to claim 1 is characterized in that, said first path is communicated with said first rodless cavity, and said alternate path is communicated with said second rodless cavity.
3. a hydraulic system that is used for engineering machinery is characterized in that, comprising:
Be divided into rod chamber and rodless cavity through piston in the master cylinder, said master cylinder, said rod chamber comprises first and second rod chambers, and said rodless cavity comprises first and second rodless cavities;
Oscillating oil cylinder;
Pump group, said pump group are that system provides pressure oil, and said pump group comprises main pump, constant pressure pump and gear pump;
The integrated valve group, said integrated valve group comprises:
Body, said body are located at said master cylinder top, and are formed with control channel in the said body;
A plurality of cartridge valve assemblies, thus said a plurality of cartridge valve assembly is integrated on the said body and link to each other with said many oil pipe roads respectively and select the high pressure pumping of pumping system and the switching-over of low pressure pumping, high low pressure pumping switching and oscillating oil cylinder with the break-make of controlling said oil pipe road;
Constant pressure pump outlet valve group, said constant pressure pump outlet valve group is connected with said constant pressure pump;
The connecting valve group that is used for construction machinery hydraulic system according to claim 1 and 2; Said connecting valve group is located on the said rodless cavity; Said connecting valve group is configured to said first and second rodless cavities sealing when said pumping system is the high pressure pumping, and said pumping system when being the low pressure pumping said first and second rodless cavities be communicated with;
Move back the concrete solenoid valve; And
Accumulator, said accumulator be connected to said constant pressure pump outlet valve group when absorbing the oscillating oil cylinder braking hydraulic shock and can be used as the interim oil sources of oscillating oil cylinder when commutating fast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120530810 CN202628633U (en) | 2011-12-16 | 2011-12-16 | Hydraulic system applied in engineering machinery and communicating valve set thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120530810 CN202628633U (en) | 2011-12-16 | 2011-12-16 | Hydraulic system applied in engineering machinery and communicating valve set thereof |
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| CN202628633U true CN202628633U (en) | 2012-12-26 |
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| CN 201120530810 Expired - Fee Related CN202628633U (en) | 2011-12-16 | 2011-12-16 | Hydraulic system applied in engineering machinery and communicating valve set thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196809A (en) * | 2014-08-19 | 2014-12-10 | 合肥长源液压股份有限公司 | Pile-up valve for recovering and reusing energy of excavator |
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2011
- 2011-12-16 CN CN 201120530810 patent/CN202628633U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196809A (en) * | 2014-08-19 | 2014-12-10 | 合肥长源液压股份有限公司 | Pile-up valve for recovering and reusing energy of excavator |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20191216 |
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| CF01 | Termination of patent right due to non-payment of annual fee |