CN202326479U - Hydraulic sequential control system and hydraulic control sequential telescoping mechanism - Google Patents
Hydraulic sequential control system and hydraulic control sequential telescoping mechanism Download PDFInfo
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- CN202326479U CN202326479U CN2011204574098U CN201120457409U CN202326479U CN 202326479 U CN202326479 U CN 202326479U CN 2011204574098 U CN2011204574098 U CN 2011204574098U CN 201120457409 U CN201120457409 U CN 201120457409U CN 202326479 U CN202326479 U CN 202326479U
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Abstract
A hydraulic sequential control system includes a reversing valve (1), a first hydraulic cylinder (10) and a second hydraulic cylinder (9), wherein the working sequence of the first hydraulic cylinder (10) and the second hydraulic cylinder (9) is controlled by a first one-way sequence valve and a second one-way sequence valve. Furthermore, the utility model also provides a hydraulic control sequential telescoping mechanism. The hydraulic sequential control system and the hydraulic control sequential telescoping mechanism can realize the sequential telescoping of telescoping parts; when only parts of the telescoping parts can extend out due to space limitation, the first and the second telescoping parts sequentially extend out, so as to enable the telescoping mechanism to be highly rigid, and the hydraulic control sequential telescoping mechanism is safe to use and reliable to work; furthermore, the utility model adopts two hydraulic cylinders, the working is safer and more reliable, the failure rate is low, and the use safety and the working reliability of the telescoping mechanism are further improved.
Description
Technical field
The utility model relates to a kind of hydraulic control system, particularly, relates to a kind of hydraulic pressure sequence control system.In addition, the utility model is a kind of hyraulic controlled type order extending means that adopts this hydraulic pressure sequence control system.
Background technique
Extensively there is extending means in the engineering machinery field, for example telescopic leg of the telescoping boom of hoist, telescopic outrigger, concrete mixer or the like.Because engineering mechanical device generally adopts hydraulic control system, so these extending meanss adopt hydraulic control system mostly.
Many occasions in the application of engineering machinery often require above-mentioned extending means realization flexible in proper order, for example for three joint telescoping booms; When lifting operation, usually require two joint arms to stretch out earlier, stretch out behind the three joint arms; And when regaining arm; Then fitness for purpose three joint arm withdrawals are earlier withdrawn behind the two joint arms, and this mainly is problems such as load-bearing rigidity of considering telescoping member in the engineering mechanical device operation process.
Generally speaking; The above-mentioned extending means that stretches in proper order through the realization of hydraulic control mode is called " hyraulic controlled type order extending means "; It comprises hydraulic pressure sequence control system, flexible benchmark piece and each telescoping member etc., and wherein said hydraulic pressure sequence control system is mainly used in that to control and drive each telescoping member through the hydraulic control mode flexible in proper order with realization.
Fig. 1 shows the schematic diagram of a kind of hyraulic controlled type order extending means commonly used in the existing technology, wherein clear this hyraulic controlled type order hydraulic pressure sequence control system that extending means adopted that shown.
Referring to shown in Figure 1, this hyraulic controlled type order extending means comprises hydraulic pressure sequence control system, flexible benchmark piece 13, first telescoping member 12 and second telescoping member 11.For the ease of describing, the P among Fig. 1 is called the oil-feed oil circuit, and T is called oil return circuit, and A is called first working oil path, and B is called second working oil path, and its actual hydraulic principle is consistent with being called corresponding hydraulic fluid port.
For example; For telescopic outrigger; Flexible benchmark piece 13 generally can be frame (the for example frame of concrete mixer); First telescoping member 12 can be the first box-shaped leg member, and second telescoping member 11 then generally is the second box-shaped leg member that is inserted into slidably in the said first box-shaped leg member.
In Fig. 1; Said hydraulic pressure sequence control system comprises a two-stage hydraulic cylinder 14 (being " the secondary cover cylinder " that those skilled in the art are commonly called as); Known ground; Two-stage hydraulic cylinder has the first order oil hydraulic cylinder and the second level oil hydraulic cylinder of suit, the cylinder body of the piston rod double as second level oil hydraulic cylinder of first order oil hydraulic cylinder wherein, and the piston rod of second level oil hydraulic cylinder is generally as external actuator.In hydraulic pressure sequence control system shown in Figure 1; The rodless cavity interface of the first order oil hydraulic cylinder of two-stage hydraulic cylinder 14 and rod chamber interface pass through working oil path A separately; B is connected in selector valve 2 (being specially a selector valve valve block of the multiple directional control valve among Fig. 1) via first Pilot operated check valve 3 and second Pilot operated check valve 4 respectively; This selector valve is connected in oil-feed oil circuit P and oil return circuit T; Wherein the hydraulic control interface of first Pilot operated check valve 3 is communicated with working oil path B, and the hydraulic control interface of second Pilot operated check valve 4 is communicated with working oil path B.
It is emphasized that in Fig. 1 that at this above-mentioned selector valve only is a selector valve valve block in the multiple directional control valve.As everyone knows, multiple directional control valve is made up of a plurality of selector valves.But; For the described hydraulic pressure sequence control system of the utility model; The switching-over that this hydraulic pressure sequence control system in fact only needs to use one of them selector valve to realize the oil hydraulic cylinder bi-directional drive gets final product; Need not use whole multiple directional control valve, should not think that therefore multiple directional control valve constitutes the necessary component of the described hydraulic pressure sequence control system of the utility model, otherwise can dwindle the protection domain of the utility model inadequately.In fact, said hydraulic pressure sequence control system can be suitable for independent selector valve fully, and needn't use multiple directional control valve shown in Figure 1.Likewise; In fact only played the effect of pressurized overflow for the oil-feed unit 1 of multiple directional control valve shown in Figure 1; With regard to the essence design of said hydraulic pressure sequence control system; Only need mention that it comprises oil-feed oil circuit P and oil return circuit T, those skilled in the art can expect conventional structures such as oil hydraulic pump, fuel tank, relief valve naturally.In addition; Realize the oil hydraulic cylinder bi-directional drive for the selector valve of realizing stretching for being used to, exist multiplely in the practical application that the most frequently used is adopts three position four-way directional control valve; The utility model does not limit this; As long as it can realize the effect of oil hydraulic cylinder bi-directional drive to realize stretching, selector valve for example employed in figure 1 is exactly a kind of unconventional three six-way transfer valves, and this mainly is to consider the problem of the oil-feed oil circuit of multiple directional control valve to each Reversing valve plate fuel feeding.
In above-mentioned hyraulic controlled type order extending means; The outer cylinder body of two-stage hydraulic cylinder is fixedly connected with flexible benchmark piece 13 (for example frame); The second level hydraulic cylinder piston rod of two-stage hydraulic cylinder is fixedly connected with second telescoping member 11 (the for example second box-shaped leg member); Second telescoping member 11 is inserted into first telescoping member 12 (the for example first box-shaped leg member) also can be at 12 kinds of moving linearlies of this first telescoping member; When second telescoping member 11 moves to desired location, drive this first telescoping member 12 moving linearly together through the block that is arranged on first telescoping member 12, but first telescoping member, 12 sleeves moving linearly also in flexible benchmark piece 13.
Below the simple operating process of describing hyraulic controlled type order extending means shown in Figure 1
First; Stretch out process: when reversing valve operated 2 upper to Fig. 1; Pressure oil gets into selector valve 2 and gets into the first working oil path A through the one-way valve in the oil-feed unit 1; Get into the rodless cavity of two-stage hydraulic cylinder then through first Pilot operated check valve 3, pressure oil is opened second Pilot operated check valve 4 through control oil channel simultaneously, and the oil return of the rod chamber of two-stage hydraulic cylinder is passed through second Pilot operated check valve 4 via the second working oil path B; And via selector valve valve block 2 entering oil return circuit T; Thereby flow back to fuel tank, the piston rod (cylinder body of the piston rod double as second level oil hydraulic cylinder of this first order oil hydraulic cylinder) and the piston rod of second level oil hydraulic cylinder that pressure oil promotes the first order oil hydraulic cylinder of two-stage hydraulic cylinder stretch out together, when the piston rod of first order oil hydraulic cylinder stretch out put in place after; The internal oil passages of the piston rod of second level oil hydraulic cylinder through said two-stage hydraulic cylinder continues to stretch out and puts in place; In the process that this stretches out, the piston rod of this second level oil hydraulic cylinder promotes second telescoping member 11 moving linearly together, when second telescoping member 11 moves to desired location; Block through being arranged on first telescoping member 12 drives this first telescoping member moving linearly together, up to accomplishing the whole process of stretching out.
Second; Withdrawal process: when reversing valve operated 2 when the next; Pressure oil gets into selector valve and flows to second working oil path through the one-way valve in the oil-feed unit 1; Get into the rod chamber of the first order oil hydraulic cylinder of two-stage hydraulic cylinder then through second Pilot operated check valve 4; Pressure oil is opened first Pilot operated check valve 3 through control oil channel simultaneously, and the oil return of the rodless cavity of the first order oil hydraulic cylinder of two-stage hydraulic cylinder is connected oil return circuit T through first Pilot operated check valve 3 and the first working oil path A via selector valve 2, thereby flows back to fuel tank.Pressure oil at first promotes the piston rod withdrawal of the second level oil hydraulic cylinder of two-stage hydraulic cylinder through internal oil passages; After withdrawal puts in place; The piston rod of piston rod of first order oil hydraulic cylinder (cylinder body of the piston rod double as second level oil hydraulic cylinder of this first order oil hydraulic cylinder) and second level oil hydraulic cylinder continues to regain together to put in place; In the process of this withdrawal, the piston rod of second level oil hydraulic cylinder drives second telescoping member 11 moving linearly together, when second telescoping member 11 moves to desired location; Through being arranged on block drivening piece first telescoping member 12 moving linearly together on first telescoping member 12, up to accomplishing whole withdrawal process.
The hydraulic pressure sequence control system of above-mentioned existing technology and hyraulic controlled type order extending means thereof have following shortcoming:
The first, in the process of stretching out, can only stretch out second telescoping member 11 earlier; Just can stretch out first telescoping member 12 then,, often can only stretch out second telescoping member when receiving place restriction can only the extension telescoping member time; Because second telescoping member, 11 general sleeves are in first telescoping member 12, so cross section is less, the rigidity of extending means is usually not enough; When load is heavier, often cause the permanent deformation of second telescoping member 11, thereby cause scrapping of whole order extending means.
The second, stretching out in the process of two-stage hydraulic cylinder, first order oil hydraulic cylinder is stretched out in designing requirement earlier; After stretch out second level oil hydraulic cylinder; But inaccuracy of in practical application, controlling owing to oil pressure and internal oil passages is unreasonable, often causes stretching out earlier second level oil hydraulic cylinder, and this moment, blocking phenomenon might appear in the rod chamber oil circuit of first order oil hydraulic cylinder; Cause first order oil hydraulic cylinder not stretch out smoothly; So the hydraulic fluid pressure in the rodless cavity of first order oil hydraulic cylinder further raises, because the rodless cavity active area of first oil hydraulic cylinder is the several times of rod chamber active area, thereby the rod chamber of first oil hydraulic cylinder is because of pressurization; Rod chamber pressure also is the several times of rodless cavity pressure; The rapid rising of rod chamber pressure causes the cylinder body of first order oil hydraulic cylinder to rise big and is out of shape, and the cylinder body of first order oil hydraulic cylinder is scrapped, and whole two-stage hydraulic cylinder need be reprocessed replacing.In fact, be used to realize that for above-mentioned for secondary or the three grades of flexible extending meanss, not only cost is higher to adopt the too complicated two-stage hydraulic cylinder of this structure, and breaks down easily, this there is no need fully.
Because the above-mentioned defective of existing technology, the hyraulic controlled type order extending means that needs a kind of new type hydraulic sequence control system of design and control by this hydraulic pressure sequence control system.
The model utility content
The utility model technical problem to be solved provides a kind of hydraulic pressure sequence control system; This hydraulic pressure sequence control system can be effectively applied to hyraulic controlled type order extending means, makes this hyraulic controlled type order extending means have the functional reliability and the Security of remarkable improvement.
On this basis, the further technical problem to be solved of the utility model provides a kind of hyraulic controlled type order extending means, and this hyraulic controlled type order extending means has the functional reliability and the safety in utilization of remarkable improvement.
In order to solve the problems of the technologies described above; The utility model provides a kind of hydraulic pressure sequence control system; Comprise the selector valve that is connected in oil-feed oil circuit and oil return circuit; This hydraulic pressure sequence control system comprises that also cylinder body connection fixed to one another and piston rod are parallel to each other and stretch out first oil hydraulic cylinder in the opposite direction and second oil hydraulic cylinder; The rodless cavity interface of said first oil hydraulic cylinder is connected in said selector valve via first one way sequence valve and first Pilot operated check valve successively; The rod chamber interface of said second oil hydraulic cylinder is connected in said selector valve via second one way sequence valve and second Pilot operated check valve successively; The rod chamber interface of said first oil hydraulic cylinder is connected in the oil circuit between said second one way sequence valve and second Pilot operated check valve; The rodless cavity interface of said second oil hydraulic cylinder is connected in the oil circuit between said first one way sequence valve and first Pilot operated check valve, and the hydraulic control interface of said first Pilot operated check valve is communicated with the inlet of said second Pilot operated check valve, and the hydraulic control interface of said second Pilot operated check valve is communicated with the inlet of said first Pilot operated check valve.
Selectively, said selector valve is a selector valve valve block in the multiple directional control valve.
Specifically selectively, said selector valve is three position four-way directional control valve or three six-way transfer valves.
Selectively, said first Pilot operated check valve and said second Pilot operated check valve form whole double hydraulic control one-way valve valve.
Particularly, said first one way sequence valve comprises first sequence valve and first one-way valve of parallel connection, and said second one way sequence valve comprises second sequence valve and second one-way valve of parallel connection.
Particularly, the filler opening of said first sequence valve is communicated with the reverse hydraulic fluid port of said first one-way valve, and the oil outlet of this first sequence valve is communicated with the forward hydraulic fluid port of said first one-way valve; The filler opening of said second sequence valve is communicated with the reverse hydraulic fluid port of said second one-way valve, and the oil outlet of this second sequence valve is communicated with the forward hydraulic fluid port of said first one-way valve.
Specifically; The oil outlet of first sequence valve in said first one way sequence valve is communicated with the rodless cavity interface of said first oil hydraulic cylinder; Filler opening is communicated with the reverse hydraulic fluid port of said first Pilot operated check valve, and the forward hydraulic fluid port of this first Pilot operated check valve is connected in said selector valve; The oil outlet of second sequence valve in said second one way sequence valve is communicated with the rod chamber interface of said second oil hydraulic cylinder, and filler opening is communicated with the reverse hydraulic fluid port of said second Pilot operated check valve, and the forward hydraulic fluid port of this second Pilot operated check valve is connected in said selector valve.
Selectively, first and second sequence valves in said first one way sequence valve and second one way sequence valve are direct-acting type sequence valve or guide type sequence valve.
Preferably, said first one way sequence valve and second one way sequence valve form whole one way sequence valve valve respectively.
On the basis of above-mentioned hydraulic control sequence control system technological scheme; The utility model provides a kind of hyraulic controlled type order extending means; Comprise the hydraulic pressure sequence control system, along the flexible benchmark piece of flexible direction fixed-site and first telescoping member and second telescoping member that can move along flexible direction straight line; Wherein, The hydraulic pressure sequence control system that said hydraulic pressure sequence control system is the above-mentioned arbitrary technological scheme of the utility model; The piston rod of wherein said second oil hydraulic cylinder is connected in said flexible benchmark piece, and the piston rod of said first oil hydraulic cylinder is connected in said second telescoping member, and the cylinder body of the cylinder body of said second oil hydraulic cylinder and/said first oil hydraulic cylinder is connected in said first telescoping member.
Preferably, said second telescoping member can straight line movably sleeve in said first telescoping member, said first telescoping member can straight line movably sleeve in said flexible benchmark piece.
Specifically selectively, said hyraulic controlled type order extending means is the hyraulic controlled type telescopic arm of crane, and said flexible benchmark piece is a basic arm, and said first telescoping member is the secondary arm, and said second telescoping member is three grades of arms.
Specifically selectively, said hyraulic controlled type order extending means is the hyraulic controlled type telescopic outrigger, and said flexible benchmark piece is a frame, and said first telescoping member is the first box-shaped leg member, and said second telescoping member is the second box-shaped leg member.
Pass through technique scheme; The utility model hydraulic pressure sequence control system and hyraulic controlled type order extending means can realize that the order of each telescoping member is flexible; In the process of stretching out, can stretch out first telescoping member earlier, and then elongator second telescoping member; In the withdrawal process; Can regain second telescoping member earlier, and then regain part first telescoping member, therefore receive spatial limitation can only the extension telescoping member time at the extending means of the utility model; Stretch out second telescoping member again and make said extending means can have better rigidity through stretching out first telescoping member, thereby improved the utility model hyraulic controlled type order extending means safety in utilization and functional reliability; In addition, the utility model adopts two oil hydraulic cylinders, and its processing is simpler than two-stage hydraulic cylinder; It is more safe and reliable to work; Rate of fault is low, even one of them oil hydraulic cylinder breaks down, also only needs this oil hydraulic cylinder of maintenance; Thereby reduced cost, further improved the safety in utilization and the functional reliability of the utility model extending means.
Other feature and advantage of the utility model will partly specify in embodiment subsequently.
Description of drawings
Attached drawings is used to provide the further understanding to the utility model; And constitute the part of specification; It is used to explain the utility model with following embodiment, but the protection domain of the utility model is not limited to following accompanying drawing and embodiment.In the accompanying drawings:
Fig. 1 is the principle schematic of the hyraulic controlled type order extending means of existing technology, has wherein shown this hyraulic controlled type order hydraulic pressure sequence control system that extending means adopted.
Fig. 2 is the principle schematic of the hyraulic controlled type order extending means of the utility model embodiment, has wherein shown the hyraulic controlled type order hydraulic pressure sequence control system that extending means adopted of this embodiment.
Description of reference numerals:
1 oil-feed unit; 2 selector valves;
3 first Pilot operated check valves; 4 second Pilot operated check valves;
5 first sequence valves; 6 first one-way valves;
7 second sequence valves; 8 second one-way valves;
9 second oil hydraulic cylinders; 10 first oil hydraulic cylinders;
11 second telescoping member; 12 first telescoping member;
13 flexible benchmark pieces; 14 two-stage hydraulic cylinders;
A first working oil path; B second working oil path;
P oil-feed oil circuit; The T oil return circuit.
Embodiment
Be elaborated below in conjunction with the embodiment of accompanying drawing to the utility model; Should be understood that; Embodiment described herein only is used for explanation and explains the utility model, and the protection domain of the utility model is not limited to following embodiment.
At first need to prove; The hydraulic pressure sequence control system of the utility model belongs to Hydraulic Field; For the technician in this field; The substantive technical conceive of hydraulic system is the hydraulic pressure annexation, and and does not lie in its concrete mechanical structure, the for example concrete structure of employed valve in said hydraulic pressure sequence control system.Certainly; For the hyraulic controlled type order extending means of the utility model; Because it relates to the layout annexation of each telescoping member, so the annexation of the oil hydraulic cylinder of these telescoping member and said hydraulic pressure sequence control system will be as far as explaining in the utility model description hereinafter.In addition; For the utility model flexible benchmark piece 13, first telescoping member 12 and second telescoping member 11 hereinafter described, when the hyraulic controlled type order extending means of the utility model was applied to different occasions, it possibly have different structural forms; For example when being used for crane arm; Flexible benchmark piece 13 is generally basic arm, and first telescoping member 12 is the secondary arm, and second telescoping member 11 is three grades of arms; For another example when being used for the box-shaped telescopic outrigger, flexible benchmark piece 13 generally can be frame (specifically can for being formed on the frame upper box), and first flexible enough members 12 are the first box-shaped leg member, and second telescoping member 11 is the second box-shaped leg member.In a word; The hyraulic controlled type order extending means of the utility model can be applied on the different concrete expansion devices; Corresponding flexible benchmark piece 13, first telescoping member 12 and second telescoping member 11 also have different structural forms and title; But no matter how it uses, as long as it belongs to the technical conceive of the utility model, all can not break away from the protection domain of the utility model.Annotatedly be; Above-mentioned flexible benchmark piece 13, first telescoping member 12 and second telescoping member 11 generally adopt the annexation of suit successively when practical application; But this not necessarily; In some applications, flexible benchmark piece 13, first telescoping member 12 and second telescoping member 11 also not necessarily form nested relationship, and the utility model does not limit this.
In addition; As stated; Although the hydraulic pressure sequence control system of the utility model has adopted a selector valve valve block in the multiple directional control valve in the illustrated embodiment, said hydraulic pressure sequence control system can be suitable for independent selector valve fully, and needn't use illustrated multiple directional control valve.Likewise; In fact only played the effect of pressurized overflow for the oil-feed unit 1 of illustrated multiple directional control valve; In said hydraulic pressure sequence control system; Only need mention that it comprises oil-feed oil circuit P and oil return circuit T, those skilled in the art can expect conventional structures such as oil hydraulic pump, fuel tank, relief valve naturally, and need not to give unnecessary details.
The following embodiment of describing the utility model hydraulic control sequence control system and hyraulic controlled type order extending means with reference to Fig. 2.
As shown in Figure 2, the hyraulic controlled type order extending means of this embodiment comprises hydraulic control sequence control system and telescoping member, and particularly, said telescoping member comprises flexible benchmark piece 13, first telescoping member 12 and second telescoping member 11.
Hydraulic pressure sequence control system shown in Figure 2 comprises first oil hydraulic cylinder 10 and second oil hydraulic cylinder 9; This first oil hydraulic cylinder 10 is connected with the cylinder body of second oil hydraulic cylinder 9 is fixed to one another; And the piston rod of the piston rod of first oil hydraulic cylinder 10 and second oil hydraulic cylinder 9 is parallel to each other and stretches out in the opposite direction; Wherein the rodless cavity interface of first oil hydraulic cylinder 10 is connected in selector valve 1 through the first working oil path A via first one way sequence valve and first Pilot operated check valve 3; The rod chamber interface of second oil hydraulic cylinder 9 is connected in selector valve 1 through the second working oil path B via second one way sequence valve and second Pilot operated check valve 4; And the rod chamber interface of first oil hydraulic cylinder 10 is connected on the second working oil path B between second one way sequence valve and second Pilot operated check valve 4; The rodless cavity interface of second oil hydraulic cylinder 9 is connected on the first working oil path A between first one way sequence valve and first Pilot operated check valve 3; Wherein, the hydraulic control interface of said first Pilot operated check valve 3 is communicated with the inlet of said second Pilot operated check valve 4, and the hydraulic control interface of said second Pilot operated check valve 4 is communicated with the inlet of said first Pilot operated check valve 3., said selector valve 1 is connected in oil-feed oil circuit P and oil return circuit T.
In the hydraulic pressure sequence control system of the utility model; Selector valve 1 preferably can be a selector valve valve block in the multiple directional control valve; This mainly is to consider in the hydraulic system of engineering mechanical device to be provided with multiple directional control valve mostly; Therefore the hydraulic pressure sequence control system of the utility model can be used one of them selector valve valve block easily, and need not to be provided with separately selector valve.What selector valve 1 was used always is three position four-way directional control valve; But the utility model does not limit this; The switching-over of the oil-feed oil return when as long as it can realize the oil hydraulic cylinder expanding-contracting action; Selector valve for example employed in figure 2 is exactly a kind of unconventional three six-way transfer valves, and this mainly is to consider the problem of the oil-feed oil circuit of multiple directional control valve to each Reversing valve plate fuel feeding.In addition, about the corresponding annexation of each working interface with the corresponding oil circuit of selector valve 1, this knows to those skilled in the art, repeats no more at this.
In addition, first one way sequence valve among Fig. 2 is formed in parallel by first sequence valve 5 and first one-way valve 6, and second one way sequence valve is formed in parallel by second sequence valve 7 and second one-way valve 8; This is apparently, known ground, and one way sequence valve is formed in parallel by sequence valve and one-way valve exactly; As long as therefore mention one way sequence valve or one way sequence valve; Those skilled in the art can know its concrete element composition naturally, and known ground is in first one way sequence valve; The filler opening of said first sequence valve 5 is communicated with the reverse hydraulic fluid port of said first one-way valve 6, and the oil outlet of this first sequence valve 5 is communicated with the forward hydraulic fluid port of said first one-way valve 6; In second one way sequence valve, the filler opening of said second sequence valve 7 is communicated with the reverse hydraulic fluid port of said second one-way valve 8, and the oil outlet of this second sequence valve 7 is communicated with the forward hydraulic fluid port of said first one-way valve 8.Annotatedly be; The function that one-way valve has forward conduction knownly, oppositely ends; The forward hydraulic fluid port is the technical characteristics of knowing with reverse hydraulic fluid port to those skilled in the art; The hydraulic oil that wherein has enough pressure gets into one-way valve from the forward hydraulic fluid port can conducting, and getting into one-way valve from reverse hydraulic fluid port then can't conducting.Preferably; Said first sequence valve 5 and second sequence valve 7 can be direct-acting type sequence valve or guide type sequence valve; Wherein, If employing guide type sequence valve; The hydraulic control interface of this guide type sequence valve generally can be connected to corresponding hydraulic control oil circuit in the hydraulic system of the engineering mechanical device that the hydraulic pressure sequence control system of the utility model connected (for example the hydraulic oil exported of oil hydraulic pump is via the formed hydraulic control oil circuit in reduction valve decompression back), and in addition, first sequence valve 5 and first one-way valve 6 can form integrally-built one way sequence valve valve, and second sequence valve 7 and second one-way valve 8 also can form integrally-built one way sequence valve valve.Simultaneously; Need to prove that be configured as a whole valve if having two Pilot operated check valves of hydraulic pressure annexation shown in Figure 2, those skilled in the art are referred to as " double hydraulic control one-way valve "; But its essential hydraulic pressure annexation is identical; That is to say that the hydraulic control interface of said first Pilot operated check valve 3 is communicated with the inlet of said second Pilot operated check valve 4, the hydraulic control interface of said second Pilot operated check valve 4 is communicated with the inlet of said first Pilot operated check valve 3.
In addition; Hydraulic fluid port annexation in the technique scheme; The hydraulic fluid port annexation of respective valves gets final product according to oil-feed, the connection of oil return direction of working oil path basically to those skilled in the art, and particularly, the oil outlet of first sequence valve 5 in said first one way sequence valve is communicated with the rodless cavity interface of said first oil hydraulic cylinder 10; Filler opening is communicated with the reverse hydraulic fluid port of said first Pilot operated check valve 3, and the forward hydraulic fluid port of this first Pilot operated check valve 3 is connected in said selector valve; The oil outlet of second sequence valve 7 in said second one way sequence valve is communicated with the rod chamber interface of said second oil hydraulic cylinder 9; Filler opening is communicated with the reverse hydraulic fluid port of said second Pilot operated check valve 4, and the forward hydraulic fluid port of this second Pilot operated check valve 4 is connected in said selector valve.
As stated; The hyraulic controlled type order extending means of the utility model comprises above-mentioned hydraulic pressure sequence control system and corresponding telescoping member; Wherein there are annexation in first oil hydraulic cylinder 10 of this hydraulic pressure sequence control system and second oil hydraulic cylinder 9 with corresponding telescoping member; Particularly; The cylinder body that the piston rod of second oil hydraulic cylinder 9 is connected in flexible benchmark piece 13, the second oil hydraulic cylinders 9 is connected in first telescoping member 12, because the cylinder body of first oil hydraulic cylinder 10 and the cylinder body of second oil hydraulic cylinder 9 are fixedly connected; Therefore also with regard to respective fixation (cylinder body of the cylinder body of certain second oil hydraulic cylinder 9 and/or said first oil hydraulic cylinder 10 simultaneously or be linked optionally with said first telescoping member 12 also be fine), the piston rod of first oil hydraulic cylinder 10 is connected in second telescoping member 11 to the cylinder body of first oil hydraulic cylinder 10 with respect to the position of first telescoping member 12.In addition, routinely, second telescoping member, 11 sleeves are in first telescoping member 12 and can moving linearly, and first telescoping member, 12 sleeves also can moving linearly in flexible benchmark piece 13.
The telescopic process of the operating process of the following hydraulic pressure sequence control system of simply describing the utility model with reference to Fig. 1 and said hyraulic controlled type order extending means.
First; Stretch out process: when reversing valve operated 2 upper to Fig. 2; Pressure oil gets into selector valve 2 through oil-feed oil circuit P; Get into the rodless cavity of second oil hydraulic cylinder 9 through first Pilot operated check valve 3 along the first working oil path A via selector valve 2; Pressure oil is opened second Pilot operated check valve 4 through control oil channel simultaneously, and (first sequence valve 5 in first one way sequence valve is not in closed condition owing to pressure reaches cracking pressure at this moment) is because the piston rod of second oil hydraulic cylinder 9 is connected with flexible benchmark piece 13; Flexible benchmark piece 13 can not move along the position relative fixed of flexible direction; Therefore the pressure oil in the rodless cavity of second oil hydraulic cylinder 9 promotes the cylinder body of second oil hydraulic cylinder 9 and drives first telescoping member 12 to stretch out left together, and the hydraulic oil in the rod chamber of second oil hydraulic cylinder 9 gets into selector valves 2 via the second working oil path B through second one-way valve 8 and second Pilot operated check valve 4, thereby and connect oil return circuit T through selector valve and flow back to fuel tank; After the stretching out stroke and accomplish of second oil hydraulic cylinder 9; Because the continuous oil-feed of oil-feed oil circuit P, so the rising of pressure oil pressure, thereby open first sequence valve 5 in first one way sequence valve; Pressure oil gets into the rodless cavity of first oil hydraulic cylinder 10 through first sequence valve 5; Because the cylinder body of first oil hydraulic cylinder 10 and the cylinder body of second oil hydraulic cylinder 9 interfix, pressure oil promotes the piston rod and second telescoping member 11 of first oil hydraulic cylinder 10 and stretches out left together, and the hydraulic oil in the rod chamber of first oil hydraulic cylinder 10 flows back to fuel tank with selector valve 2 via oil return circuit T through second Pilot operated check valve 4.
As stated; The stretching out of extending means of hyraulic controlled type order of the utility model is accomplished, and in actual use, also can only accomplish the cylinder body of second oil hydraulic cylinder 9 and the process of stretching out of first telescoping member 12 as required; Promptly the cylinder body of second oil hydraulic cylinder 9 and first telescoping member 12 stretch out put in place after; Selector valve 2 is switched to meta, and fuel cut-off makes second oil hydraulic cylinder 9 realize self-locking.
Second; Withdrawal process: when reversing valve operated 2 when the next; Pressure oil gets into the second working oil path B through the oil-feed oil circuit via selector valve 2; Pressure oil gets into the rod chamber of first oil hydraulic cylinder 10 through second Pilot operated check valve 4; Pressure oil is opened first Pilot operated check valve 3 through control oil channel simultaneously; (second sequence valve 7 in second one way sequence valve is not in closed condition owing to oil pressure reaches cracking pressure at this moment); Therefore get into the piston rod and second telescoping member 11 that pressure oil in the rod chamber of first oil hydraulic cylinder 10 promotes first oil hydraulic cylinder 10 and regain to the right together, the hydraulic oil in the rodless cavity of first oil hydraulic cylinder 10 gets into selector valves 2 through part first one-way valve 6 and first Pilot operated check valve 3, and flows back to fuel tank through selector valve 2 connection oil return circuit T; After the withdrawal stroke of first oil hydraulic cylinder 10 is accomplished; Pressure oil pressure raises and opens second sequence valve 7 in second one way sequence valve, and pressure oil is through the rod chamber of second sequence valve, 7 entering, second oil hydraulic cylinder 9, because the piston rod of second oil hydraulic cylinder 9 is with relatively-stationary flexible reference key 13 is connected and can not moves along flexible direction position; Pressure oil promotes the cylinder body and first telescoping member 12 of second oil hydraulic cylinder 9 and regains to the right together, flows back to fuel tank thereby the hydraulic oil in the rodless cavity of second oil hydraulic cylinder 9 gets into oil return circuit T with selector valve 2 via selector valve 2 through first Pilot operated check valve 3.
Through above description, the main technical points of hydraulic pressure sequence control system of the utility model and hyraulic controlled type order extending means is: the first, realized that the order of each telescoping member is flexible; In the process of stretching out; Stretch out first telescoping member 12 earlier, and then stretch out second telescoping member 11, in the withdrawal process; Regain second telescoping member earlier, and then regain first telescoping member; The second, when the extending means of the utility model receives spatial limitation can only the extension telescoping member time, stretch out first telescoping member ratio and stretch out second telescoping member and make said extending means have better rigidity, thereby improved the Security of using.The 3rd, adopt sequence valve to control the sequence of movement of first oil hydraulic cylinder and second oil hydraulic cylinder.
Can find out that by last description the utility model hydraulic pressure sequence control system and hyraulic controlled type order extending means advantage are: the first, realized that the order of each telescoping member is flexible; In the process of stretching out, stretch out first telescoping member earlier, and then elongator second telescoping member; In the withdrawal process; Regain earlier second telescoping member, and then regain first telescoping member, when the extending means of the utility model receives spatial limitation can only the extension telescoping member time; Stretch out first telescoping member and stretch out second telescoping member again and make said extending means have better rigidity, thereby improved the utility model hyraulic controlled type order extending means safety in utilization and functional reliability; The second, the utility model adopts two oil hydraulic cylinders, and its processing is simpler than two-stage hydraulic cylinder; It is more safe and reliable to work; Rate of fault is low, even one of them oil hydraulic cylinder breaks down, also only needs this oil hydraulic cylinder of maintenance; Thereby reduced cost, further improved the safety in utilization and the functional reliability of the utility model extending means.
More than combine accompanying drawing to describe the preferred implementation of the utility model in detail; But; The utility model is not limited to the detail in the above-mentioned mode of execution; In the technical conceive scope of the utility model, can carry out multiple simple variant to the technological scheme of the utility model, these simple variant all belong to the protection domain of the utility model.For example, can first Pilot operated check valve 3 that connect in the hydraulic control system shown in Figure 2 and second Pilot operated check valve be changed into integrated type double hydraulic control one-way valve valve.In addition; Need annotatedly be; In the description of the utility model embodiment, from knowing that purpose of description used " first ", " second " sequencer of etc.ing, but this does not represent the difference of the existence substance structure between the respective members; And majority only is to it will be apparent to those skilled in the art that the utility model in order more clearly to help, so it should not constitute the restriction to the utility model protection domain.
Need to prove that in addition each the concrete technical characteristics described in above-mentioned embodiment under reconcilable situation, can make up through any suitable manner.For fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between the various mode of execution of the utility model, as long as its thought without prejudice to the utility model, it should be regarded as content disclosed in the utility model equally.
Claims (13)
1. hydraulic pressure sequence control system; Comprise the selector valve (1) that is connected in oil-feed oil circuit (P) and oil return circuit (T); It is characterized in that; This hydraulic pressure sequence control system comprises that also cylinder body connection fixed to one another and piston rod are parallel to each other and stretch out first oil hydraulic cylinder (10) in the opposite direction and second oil hydraulic cylinder (9)
The rodless cavity interface of said first oil hydraulic cylinder (10) is connected in said selector valve (1) via first one way sequence valve and first Pilot operated check valve (3) successively; The rod chamber interface of said second oil hydraulic cylinder (9) is connected in said selector valve (1) via second one way sequence valve and second Pilot operated check valve (4) successively; The rod chamber interface of said first oil hydraulic cylinder (10) is connected in the oil circuit between said second one way sequence valve and second Pilot operated check valve (4); The rodless cavity interface of said second oil hydraulic cylinder (9) is connected in the oil circuit between said first one way sequence valve and first Pilot operated check valve (3); The hydraulic control interface of said first Pilot operated check valve (3) is communicated with the inlet of said second Pilot operated check valve (4), and the hydraulic control interface of said second Pilot operated check valve (4) is communicated with the inlet of said first Pilot operated check valve (3).
2. hydraulic pressure sequence control system according to claim 1 is characterized in that, said selector valve (2) is a selector valve valve block in the multiple directional control valve.
3. hydraulic pressure sequence control system according to claim 1 is characterized in that, said selector valve (2) is three position four-way directional control valve or three six-way transfer valves.
4. hydraulic pressure sequence control system according to claim 1 is characterized in that, said first Pilot operated check valve (3) and said second Pilot operated check valve (4) form whole double hydraulic control one-way valve valve.
5. hydraulic pressure sequence control system according to claim 1; It is characterized in that; Said first one way sequence valve comprises first sequence valve (5) and first one-way valve (6) of parallel connection, and said second one way sequence valve comprises second sequence valve (7) and second one-way valve (8) of parallel connection.
6. hydraulic pressure sequence control system according to claim 5; It is characterized in that; The filler opening of said first sequence valve (5) is communicated with the reverse hydraulic fluid port of said first one-way valve (6), and the oil outlet of this first sequence valve (5) is communicated with the forward hydraulic fluid port of said first one-way valve (6); The filler opening of said second sequence valve (7) is communicated with the reverse hydraulic fluid port of said second one-way valve (8), and the oil outlet of this second sequence valve (7) is communicated with the forward hydraulic fluid port of said first one-way valve (8).
7. hydraulic pressure sequence control system according to claim 5; It is characterized in that; The oil outlet of first sequence valve (5) in said first one way sequence valve is communicated with the rodless cavity interface of said first oil hydraulic cylinder (10); Filler opening is communicated with the reverse hydraulic fluid port of said first Pilot operated check valve (3), and the forward hydraulic fluid port of this first Pilot operated check valve (3) is connected in said selector valve; The oil outlet of second sequence valve (7) in said second one way sequence valve is communicated with the rod chamber interface of said second oil hydraulic cylinder (9); Filler opening is communicated with the reverse hydraulic fluid port of said second Pilot operated check valve (4), and the forward hydraulic fluid port of this second Pilot operated check valve (4) is connected in said selector valve.
8. hydraulic pressure sequence control system according to claim 5 is characterized in that, first and second sequence valves (5,7) in said first one way sequence valve and second one way sequence valve are direct-acting type sequence valve or guide type sequence valve.
9. hydraulic pressure sequence control system according to claim 1 is characterized in that, said first one way sequence valve and second one way sequence valve form whole one way sequence valve valve respectively.
10. hyraulic controlled type order extending means; Comprise the hydraulic pressure sequence control system, along the flexible benchmark piece (13) of flexible direction fixed-site and first telescoping member (12) and second telescoping member (11) that can move along flexible direction straight line; It is characterized in that; Said hydraulic pressure sequence control system is according to each described hydraulic pressure sequence control system in the claim 1 to 9; The piston rod of wherein said second oil hydraulic cylinder (9) is connected in said flexible benchmark piece (13); The piston rod of said first oil hydraulic cylinder (10) is connected in said second telescoping member (11), and the cylinder body of the cylinder body of said second oil hydraulic cylinder (9) and/said first oil hydraulic cylinder (10) is connected in said first telescoping member (12).
11. hyraulic controlled type order extending means according to claim 10; It is characterized in that; Said second telescoping member (11) can straight line movably sleeve in said first telescoping member (12), said first telescoping member can straight line movably sleeve in said flexible benchmark piece (13).
12. hyraulic controlled type order extending means according to claim 11; It is characterized in that; Said hyraulic controlled type order extending means is the hyraulic controlled type telescopic arm of crane; Said flexible benchmark piece (13) is a basic arm, and said first telescoping member (12) is the secondary arm, and said second telescoping member (11) is three grades of arms.
13. hyraulic controlled type order extending means according to claim 11; It is characterized in that; Said hyraulic controlled type order extending means is the hyraulic controlled type telescopic outrigger; Said flexible benchmark piece (13) is a frame, and said first telescoping member (12) is the first box-shaped leg member, and said second telescoping member (11) is the second box-shaped leg member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204574098U CN202326479U (en) | 2011-11-17 | 2011-11-17 | Hydraulic sequential control system and hydraulic control sequential telescoping mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204574098U CN202326479U (en) | 2011-11-17 | 2011-11-17 | Hydraulic sequential control system and hydraulic control sequential telescoping mechanism |
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| Publication Number | Publication Date |
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| CN202326479U true CN202326479U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204574098U Expired - Fee Related CN202326479U (en) | 2011-11-17 | 2011-11-17 | Hydraulic sequential control system and hydraulic control sequential telescoping mechanism |
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| CN (1) | CN202326479U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423221A (en) * | 2013-07-24 | 2013-12-04 | 三一汽车起重机械有限公司 | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machine |
| CN104088837A (en) * | 2014-07-02 | 2014-10-08 | 徐州重型机械有限公司 | Oil cylinder sequential action hydraulic control system and engineering machinery device |
| CN110762072A (en) * | 2019-11-05 | 2020-02-07 | 徐州徐工矿业机械有限公司 | Hydraulic system and method for realizing sequential action of engineering vehicle mechanism and engineering vehicle |
| JP2020128819A (en) * | 2016-09-27 | 2020-08-27 | 株式会社クボタ | Hydraulic system of work machine |
| CN113944663A (en) * | 2021-10-28 | 2022-01-18 | 江苏汇智高端工程机械创新中心有限公司 | Work connection valve body structure, work connection and control method and mining hydraulic excavator |
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2011
- 2011-11-17 CN CN2011204574098U patent/CN202326479U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423221A (en) * | 2013-07-24 | 2013-12-04 | 三一汽车起重机械有限公司 | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machine |
| CN103423221B (en) * | 2013-07-24 | 2015-10-28 | 三一汽车起重机械有限公司 | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machinery |
| CN104088837A (en) * | 2014-07-02 | 2014-10-08 | 徐州重型机械有限公司 | Oil cylinder sequential action hydraulic control system and engineering machinery device |
| JP2020128819A (en) * | 2016-09-27 | 2020-08-27 | 株式会社クボタ | Hydraulic system of work machine |
| CN110762072A (en) * | 2019-11-05 | 2020-02-07 | 徐州徐工矿业机械有限公司 | Hydraulic system and method for realizing sequential action of engineering vehicle mechanism and engineering vehicle |
| CN110762072B (en) * | 2019-11-05 | 2022-02-15 | 徐州徐工矿业机械有限公司 | Hydraulic system and method for realizing sequential action of engineering vehicle mechanism and engineering vehicle |
| CN113944663A (en) * | 2021-10-28 | 2022-01-18 | 江苏汇智高端工程机械创新中心有限公司 | Work connection valve body structure, work connection and control method and mining hydraulic excavator |
| CN113944663B (en) * | 2021-10-28 | 2024-04-02 | 江苏汇智高端工程机械创新中心有限公司 | Working link valve body structure, working link, control method and mining hydraulic excavator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20171117 |
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| CF01 | Termination of patent right due to non-payment of annual fee |