CN103423221A - Multi-oil-cylinder sequence telescopic hydraulic system and engineering machine - Google Patents
Multi-oil-cylinder sequence telescopic hydraulic system and engineering machine Download PDFInfo
- Publication number
- CN103423221A CN103423221A CN2013103137834A CN201310313783A CN103423221A CN 103423221 A CN103423221 A CN 103423221A CN 2013103137834 A CN2013103137834 A CN 2013103137834A CN 201310313783 A CN201310313783 A CN 201310313783A CN 103423221 A CN103423221 A CN 103423221A
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- oil cylinder
- switch valve
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention discloses a multi-oil-cylinder sequence telescopic hydraulic system and an engineering machine. The multi-oil-cylinder sequence telescopic hydraulic system comprises a main valve, a first oil cylinder, a second oil cylinder, a first switching valve, a second switching valve and a reversing valve, wherein a first working oil port and a second working oil port in the main valve are connected to a first oil port in the second switching valve and a first oil port in the first switching valve respectively. An oil inlet and an oil return port in the reversing valve are connected to a second oil port in the second switching valve and a second oil port in the first switching valve respectively. A first working oil port and a second working oil port in the reversing valve are connected to a rodless cavity in the second oil cylinder and a rodless cavity in the first oil cylinder respectively. A rod cavity in the first oil cylinder is connected to a rod cavity in the second oil cavity and connected to the first oil port in the first switching valve or the second working oil port in the main valve. The multi-oil-cylinder sequence telescopic hydraulic system is simple in structure and free of the adoption of a one-way sequence valve or a hydraulic lock and the like, reliability is ensured, and the overall cost is reduced at the same time.
Description
Technical field
The present invention relates to Multi-cylinder sequential control technology field, particularly a kind of Multi-cylinder sequential telescopic hydraulic system and engineering machinery.
Background technique
In order to increase span, improve stability, on the engineering machinery such as hoist, operated by rotary motion has at least two-stage telescopic outrigger (oil cylinder), for example can comprise horizontal support legs and vertical leg.When preparing lifting operation, need first horizontal support legs to be stretched out, then vertical leg is stretched out with ground and contacted, to form the stable support face of lifting operation.When the preparation transition is moved after operation completes, need again first vertical leg to be retracted, then horizontal support legs is retracted, to meet the requirement of transportation.
In order to realize the sequential telescopic of a plurality of support oil cylinders, existing hydraulic system adopts main valve (main reversing valve (as the patent No. is CN201120457409 and the disclosed scheme of CN201120320733), for controlling the oil inlet and oil return state), organize the realizations such as one way sequence valve and/or hydraulic lock more, wherein, one way sequence valve is for realizing sequence control, and hydraulic lock is for realizing the locking of oil cylinder rodless cavity or rod chamber.Yet the structure of this scheme is comparatively complicated, the overall cost of each hydraulic element is higher.
Therefore, how for the high shortcoming of complex structure, cost of existing Multi-cylinder sequence control mode, being improved, is those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
In view of this, one of purpose of the present invention is to provide a kind of Multi-cylinder sequential telescopic hydraulic system, to reduce structural complexity, to reduce financial cost.
Particularly, Multi-cylinder sequential telescopic hydraulic system of the present invention, comprise main valve, the first oil cylinder and the second oil cylinder, also comprise the first switch valve, second switch valve and selector valve, wherein: the first actuator port of described main valve and the second actuator port are connected to respectively the first hydraulic fluid port of described second switch valve and the first hydraulic fluid port of described the first switch valve; The filler opening of described selector valve and return opening are connected to respectively the second hydraulic fluid port of described second switch valve and the second hydraulic fluid port of described the first switch valve, and the first actuator port of described selector valve and the second actuator port are connected to respectively the rodless cavity of described the second oil cylinder and the rodless cavity of described the first oil cylinder; The rod chamber of described the first oil cylinder is connected to the rod chamber of described the second oil cylinder, and the rod chamber of described the first oil cylinder is connected to the first hydraulic fluid port of described the first switch valve or is connected to the second actuator port of described main valve.
Further, also comprise back pressure valve, described back pressure valve is arranged on the oil circuit between the first hydraulic fluid port of the second actuator port of described main valve and described the first switch valve.
Further, described selector valve is hydraulic control valve.
Further, the hydraulic control of described selector valve is terminated at the rodless cavity of described the first oil cylinder, under the initialization state, the filler opening of described selector valve is communicated in the first actuator port, return opening is communicated in the second actuator port, under another kind of working state, the filler opening of described selector valve is communicated in the second actuator port, and return opening is communicated in the first actuator port.
Further, described main valve is the three-position four-way valve that Median Function is Y type or H type.
Further, also comprise the 3rd oil cylinder and the 3rd switch valve; Described second switch valve and described the 3rd switch valve are two-position three-way valve; The 3rd hydraulic fluid port of described second switch valve is connected to the rodless cavity of described the 3rd oil cylinder, the rod chamber of described the 3rd oil cylinder is connected to the first hydraulic fluid port of described the 3rd switch valve, and the second hydraulic fluid port of described the 3rd switch valve and the 3rd hydraulic fluid port are connected to respectively the 3rd hydraulic fluid port of described second switch valve and the second actuator port of described main valve.
Further, also comprise the Pilot operated check valve on the oil circuit be arranged between described second switch valve and described the 3rd oil cylinder, the free filler opening of described Pilot operated check valve is connected to the 3rd hydraulic fluid port of described second switch valve, the free oil outlet of described Pilot operated check valve is connected to the rodless cavity of described the 3rd oil cylinder, and the hydraulic control of described Pilot operated check valve is terminated at the first hydraulic fluid port of described the 3rd switch valve.
Further, also comprise one-way valve and relief valve on the oil circuit be arranged between described the 3rd switch valve and described the 3rd oil cylinder, the filler opening of described one-way valve and the oil outlet of described relief valve are connected to the first hydraulic fluid port of described the 3rd switch valve, and the oil outlet of described one-way valve and the filler opening of described relief valve are connected to the rod chamber of described the 3rd oil cylinder.
While adopting Multi-cylinder sequential telescopic hydraulic system of the present invention, by controlling the working state of the first switch valve, second switch valve, main valve and selector valve, the order that can realize the first oil cylinder and the second oil cylinder is stretched out and the order of the second oil cylinder and the first oil cylinder is retracted, and can realize the rod chamber of each oil cylinder or the safe lock of rodless cavity in this process, avoid each oil cylinder unexpected flexible phenomenon to occur under the effect of external force; Compared with prior art, Multi-cylinder sequential telescopic hydraulic system of the present invention can adopt the first switch valve simple in structure, second switch valve and selector valve, and, without adopting the complex structures such as one way sequence valve or hydraulic lock, hydraulic element that cost is higher, when guaranteeing reliability, reduced overall cost; In addition, if the rod chamber of the first oil cylinder is connected to the first hydraulic fluid port of the first switch valve, can also realize that the order of the first oil cylinder and the second oil cylinder is stretched out fast (differential stretching out), save stretching out the time of the first oil cylinder and the second oil cylinder, improve efficiency.
In a kind of optional scheme further, selector valve adopts hydraulic control valve, and the working state of this hydraulic control valve is controlled by the oil pressure size of the first oil cylinder rodless cavity, can make like this working state of selector valve in the course of the work without manual tune, but along with the oil pressure of the first oil cylinder rodless cavity is regulated automatically, to complete the sequential telescopic action.
In further a kind of possibility, Multi-cylinder sequential telescopic hydraulic system of the present invention also comprises the 3rd oil cylinder and the 3rd switch valve, second switch valve and the 3rd switch valve are two-position three-way valve, can realize that like this order of the first oil cylinder, the second oil cylinder and the 3rd oil cylinder stretches out, and the order that realizes the 3rd oil cylinder, the second oil cylinder and the first oil cylinder retracts, in addition, can also realize the stretching out fast of the 3rd oil cylinder (differential stretching out), approximately stretching out the time of the 3rd oil cylinder, improved efficiency.
In further a kind of possibility, be provided with Pilot operated check valve between second switch valve and the 3rd oil cylinder, be provided with one-way valve and relief valve between the 3rd switch valve and the 3rd oil cylinder, can guarantee the functional reliability of the 3rd oil cylinder like this, avoid the 3rd oil cylinder because of the effect of the external force flexible phenomenon that meets accident; In addition, relief valve can avoid the 3rd oil cylinder to damage because the oil temperature of rod chamber is too high.
Two of purpose of the present invention is to provide a kind of engineering machinery, and this project machinery is provided with the supporting leg hydraulic system, and this supporting leg hydraulic system is the described Multi-cylinder sequential telescopic of above-mentioned any one hydraulic system.
Further, this project machinery is hoist.
Because above-mentioned Multi-cylinder sequential telescopic hydraulic system has above-mentioned technique effect, therefore, engineering machinery of the present invention also has corresponding technique effect.
The accompanying drawing explanation
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention the present invention does not form inappropriate limitation of the present invention for explaining.In the accompanying drawings:
The principle schematic of a kind of Multi-cylinder sequential telescopic hydraulic system that Fig. 1 provides for the embodiment of the present invention;
The principle schematic that Fig. 2 is a kind of concrete application scenarios of Multi-cylinder sequential telescopic hydraulic system shown in Fig. 1.
The primary component symbol description:
1 first oil cylinder
2 second oil cylinders
3 the 3rd oil cylinders
4 main valves
5 back pressure valves
6 first switch valves
7 selector valves
8 second switch valves
9 the 3rd switch valves
10 one-way valves
11 relief valves
12 Pilot operated check valves
01 oil-feed oil circuit
02 oil return circuit
Embodiment
It should be pointed out that in this part, description and the description order to concrete structure is only the explanation to specific embodiment, should not be considered as that protection scope of the present invention is had to any restriction.In addition, under the situation of not conflicting, embodiment and the feature in embodiment in this part can combine mutually.
Please refer to Fig. 1 and Fig. 2, below in conjunction with accompanying drawing, the embodiment of the present invention is elaborated.
Shown in Fig. 1, this embodiment's Multi-cylinder sequential telescopic hydraulic system comprises the first oil cylinder 1, the second oil cylinder 2, the 3rd oil cylinder 3, main valve 4, back pressure valve 5, the first switch valve 6, selector valve 7, second switch valve 8, the 3rd switch valve 9, one-way valve 10, relief valve 11 and Pilot operated check valve 12.
In the present embodiment, the first switch valve 6 is preferably the 2/2-way valve, between the first hydraulic fluid port of the first switch valve 6 and the second hydraulic fluid port, can be communicated with or disconnect; Second switch valve 8 and the 3rd switch valve 9 all are preferably two-position three-way valve, and the first hydraulic fluid port of second switch valve 8/ the 3rd switch valve 9 can be optionally be communicated with in its second hydraulic fluid port and the 3rd hydraulic fluid port one; Back pressure valve 5 is preferably one-way valve.
In the present embodiment, main valve 4 is preferably the three-position four-way valve that Median Function is the Y type, i.e. under the first working state (shown in Fig. 1, being left position), the oil inlet P of main valve 4 is communicated in the second actuator port B, oil return inlet T is communicated in the first actuator port A, under the second working state (being right position shown in Fig. 1), the oil inlet P of main valve 4 is communicated in the first actuator port A, oil return inlet T is communicated in the second actuator port B, under the 3rd working state (being meta shown in Fig. 1), the oil inlet P cut-off of main valve 4, the first actuator port A, the second actuator port B and oil return inlet T communicate.The first actuator port A of main valve 4 and the second actuator port B are connected to respectively the first hydraulic fluid port of second switch valve 8 and the filler opening of back pressure valve 5, and the oil outlet of back pressure valve 5 is connected to the first hydraulic fluid port of the first switch valve 6.
In the present embodiment, selector valve 7 is preferably hydraulic control valve, and under the initialization state (being left position shown in Fig. 1), the oil inlet P of selector valve 7 is communicated in the first actuator port A, oil return inlet T is communicated in the second actuator port B, under another kind of working state (being right position shown in Fig. 1), the oil inlet P of selector valve 7 is communicated in the second actuator port B, and oil return inlet T is communicated in the first actuator port A; The oil inlet P of selector valve 7 and oil return inlet T are connected to respectively the second hydraulic fluid port of second switch valve 8 and the second hydraulic fluid port of the first switch valve 6, the first actuator port A of selector valve 7 and the second actuator port B are connected to respectively the rodless cavity of the second oil cylinder 2 and the rodless cavity of the first oil cylinder 1, and the hydraulic control of selector valve 7 is terminated at the rodless cavity of the first oil cylinder 1.The rod chamber of the first oil cylinder 1 is connected to the rod chamber of the second oil cylinder 2, and the rod chamber of the first oil cylinder 1 is connected to the first hydraulic fluid port of the first switch valve 6.
The 3rd hydraulic fluid port of second switch valve 8 is connected to the free filler opening of Pilot operated check valve 12, and the free oil outlet of Pilot operated check valve 12 is connected to the rodless cavity of the 3rd oil cylinder 3, and the hydraulic control of Pilot operated check valve 12 is terminated at the first hydraulic fluid port of the 3rd switch valve 3.The oil outlet of the filler opening of one-way valve 10 and relief valve 11 all is connected to the first hydraulic fluid port of the 3rd switch valve 9, and the filler opening of the oil outlet of one-way valve 10 and relief valve 11 is connected to the rod chamber of the 3rd oil cylinder 3.The second hydraulic fluid port of the 3rd switch valve 9 and the 3rd hydraulic fluid port are connected to respectively the 3rd hydraulic fluid port and the main valve 4 second actuator port B of second switch valve 8.
Below in conjunction with concrete application scenarios shown in Fig. 2, the working principle of the Multi-cylinder sequential telescopic hydraulic system of above-described embodiment once is described, in addition, for convenience of explanation, main valve 4, the first switch valve 6, second switch valve 8 and the 3rd switch valve 9 are solenoid valve, be that main valve 4 has electromagnetic coil DT1 and DT2, the first switch valve 6 has electromagnetic coil DT3, second switch valve 8 has electromagnetic coil DT4, the 3rd switch valve has electromagnetic coil DT5, each solenoid valve working position corresponding to power failure state is shown in Figure 1.Take and be applied to hoist as example, hoist is provided with four groups of support oil cylinders, every group of support oil cylinder includes the first cross cylinder (corresponding to the first oil cylinder 1), the second cross cylinder (corresponding to the second oil cylinder 2) and Vertical Cylinders (corresponding to the 3rd oil cylinder 3), the hydraulic system of every group of support oil cylinder all adopts above-mentioned Multi-cylinder sequential telescopic hydraulic system, the oil inlet P of each main valve 4 is connected to the oil outlet of oil-feed oil circuit 01(as oil pump), oil return inlet T is connected to oil return circuit 02(as fuel tank).The sequential telescopic course of action of the first oil cylinder 1, the second oil cylinder 2 and the 3rd oil cylinder 3 is as follows:
One, the first oil cylinder 1, the second oil cylinder 2 and the 3rd oil cylinder 3 orders are stretched out.
1, control electromagnetic coil DT1, DT3 and DT5 obtain electric, electromagnetic coil DT4 dead electricity, main valve 4 works in left position, the first switch valve 6 and the 3rd switch valve 9 work in right position, second switch valve 8 works in left position, selector valve 7 is operated in left position (initialization state).Pressure oil from oil-feed oil circuit 01 enters from the P mouth of main valve 4, from the B mouth, flows out, and after the T mouth and B mouth of back pressure valve 5, the first switch valve 6 and selector valve 7, enters in the rodless cavity of the first oil cylinder 1 successively, and the first oil cylinder 1 is stretched out to the right; Because the rod chamber of the rod chamber of the first oil cylinder 1 and the second oil cylinder 2 is communicated with, and second switch valve 8(is in left position) by the rodless cavity locking of the second oil cylinder 2, the oil return of the rod chamber of the first oil cylinder 1 will enter in the rodless cavity of the first oil cylinder 1 through T mouth and the B mouth of the first switch valve 6, selector valve 7, thereby realizes the stretching out fast of the first oil cylinder 1 (differential stretching out).
2, when the first oil cylinder 1 extend out to low order end, the oil pressure of its rodless cavity raises, the oil pressure of selector valve 7 hydraulic control ends increases, the spool that promotes selector valve 7 is pushed into the work of right position, the rodless cavity of such the first oil cylinder 1 will be by second switch valve 4(in left position) locking, and pressure oil enters the rodless cavity of the second oil cylinder 2 through the T of selector valve 7 mouth and A mouth, the second oil cylinder 2 is stretched out left, the oil return of the rod chamber of the second oil cylinder 2 is through the rod chamber of the first oil cylinder 1, the first switch valve 6, the T mouth of selector valve 7 and A mouth enter in the rodless cavity of the second oil cylinder 2, thereby realize the stretching out fast of the second oil cylinder 2 (differential stretching out).After stretching out end, control electromagnetic coil DT1 and DT3 dead electricity, main valve 1 is in meta, the first switch valve 6 is in left position (disconnections), from the pressure of oil-feed oil circuit 01, disconnects, and selector valve 7 returns to initialization state (left) under the effect of self spring, now, the rodless cavity of the first oil cylinder 1 is by the first switch valve 6 lockings, and the rodless cavity of the second oil cylinder 2 is by second switch valve 8 lockings, and the rod chamber of the first oil cylinder 1 and the second oil cylinder 2 is by the first switch valve 6 and back pressure valve 5 lockings.
3, controlling electromagnetic coil DT2 obtains electric, main valve 4 is operated in right position, from oil-feed oil circuit 01 pressure oil successively through the P of main valve 4 mouth and A mouth, second switch valve 8(in left position) and Pilot operated check valve 12 after, enter in the rodless cavity of the 3rd oil cylinder 3, the 3rd oil cylinder 3 is stretched out, and the oil return of the 3rd oil cylinder 3 rod chambers is after the pressure that overcomes relief valve 11, through selector valve 8(in right position), Pilot operated check valve 12 enters in the rodless cavity of the 3rd oil cylinder 3, thereby realize the stretching out fast of the 3rd oil cylinder 3 (differential stretching out); If control in advance electromagnetic coil DT5 dead electricity, though the 3rd switch valve 9 in left position, the oil return through the 3rd switch valve 9 will flow into oil return circuit from B mouth and the T mouth of main valve 4, thereby realize normally stretching out of the 3rd oil cylinder 3.
Two, the 3rd oil cylinder 3, the second oil cylinder 2 and the first oil cylinder 1 order are retracted.
4, control electromagnetic coil DT2 dead electricity, DT1 obtains electric, electromagnetic coil DT5 dead electricity, (referring to above, electromagnetic coil DT3 and DT4 also remain on power failure state), main valve 4 is operated in left position, second switch valve 8 and the 3rd switch valve 9 all are operated in left position, from the pressure oil of oil-feed oil circuit 01 successively through the P of main valve 4 mouth and B mouth, the 3rd switch valve 9, one-way valve 10 enters in the rod chamber of the 3rd oil cylinder 3, open Pilot operated check valve 12 simultaneously, the oil return of the 3rd oil cylinder 3 rodless cavities is through Pilot operated check valve 12, second switch valve 8, enter oil return circuit 02 after the A mouth of main valve 4 and T mouth, thereby realize the retract action of the 3rd oil cylinder 3, in this process, the pressure oil that is entered the rod chamber of the first oil cylinder 1 by main valve 4 through back pressure valve 2 can drive the first oil cylinder 1 or the second oil cylinder 2, but because of the rodless cavity of the first oil cylinder 1 and the second oil cylinder 2 respectively by the first switch valve 3 and second switch valve 4 lockings, therefore the first oil cylinder 1 and the second oil cylinder 2 attonity.
5, after the 3rd oil cylinder 3 is retracted, controlling electromagnetic coil DT4 and DT5 obtains electric, (electromagnetic coil DT3 continues to keep power failure state), second switch valve 8 and the 3rd switch valve 9 all are operated in right position, from the pressure oil of oil-feed oil circuit 01 through the P of main valve 4 mouth and B mouth, after back pressure valve 5, enter the rod chamber kind of the first oil cylinder 1 and the second oil cylinder 2, due to the rodless cavity of the first oil cylinder 1 by the first switch valve 6 lockings, so the first oil cylinder 1 attonity, and the rodless cavity oil return of the second oil cylinder 1 is through the A of selector valve 7 mouth and P mouth, second switch valve 8(is in right position), after the A mouth of main valve 4 and T mouth, enter in oil return circuit 02, thereby realize the retraction of the second oil cylinder 2.
6, after the second oil cylinder 2 is all retracted, the rodless cavity oil pressure of the first oil cylinder 1 will raise, the oil pressure of selector valve 7 hydraulic control ends increases, and then overcome self spring force and promote spool and be operated in right position, thereby make the rodless cavity of the second oil cylinder 2 by the first switch valve 6 lockings, and the B mouth of the rodless cavity oil return of the first oil cylinder 1 by selector valve 7 and P mouth, second switch valve 8(are in right position), A mouth and the T mouth of main valve 4 enter in oil return circuit 02, thereby realize the retraction of the first oil cylinder 1.After the first oil cylinder 1 is retracted and is put in place, control electromagnetic coil DT1 dead electricity, main valve 4 is in meta, from the pressure of oil-feed oil circuit 01, disappears, and selector valve 7 returns to initialization state (left position) under the effect of self spring; Owing to inputting without pressure, back pressure valve 5 can locking the first oil cylinder 1 and the rod chamber of the second oil cylinder 2, avoid the action (for example, avoiding the first oil cylinder 1 or the second oil cylinder 2 slowly to stretch out) that meets accident of the first oil cylinder 1 and the second oil cylinder 2 under the effect of inertial force in the Vehicle Driving Cycle process.
From the foregoing, compared with prior art, the Multi-cylinder sequential telescopic hydraulic system of the embodiment of the present invention is by adopting three switch valves and selector valve 7 can realize the sequential telescopic action of three oil cylinders, layout and simple in structure, without using the complex structures such as many group one way sequence valves or hydraulic lock, hydraulic element that cost is higher, thereby complexity and General Implementing cost have been reduced; Secondly, can also realize the stretching out fast of each oil cylinder (differential stretching out), save stretching out the time of each oil cylinder, improve efficiency; Moreover, in the process of sequential telescopic and after sequential telescopic completes, each oil cylinder all can obtain corresponding locking, avoided unexpected flexible situation occurring, thereby reliability is high.In addition, selector valve 7 adopts hydraulic control valve, and its status adjustment depends on the rod chamber oil pressure of the first oil cylinder 1, without manual tune, is swift in response, and efficiency is high.In addition, relief valve 11 can avoid the 3rd oil cylinder 3 to be damaged because the oil temperature of rod chamber is too high.
It should be noted that, in above-described embodiment, Pilot operated check valve 12, relief valve 11 and one-way valve 10 etc. are set on the oil inlet and oil return oil circuit of the 3rd oil cylinder 3, contribute to improve the Reliability of Microprocessor of the 3rd oil cylinder 3, but in other embodiments, and do not mean that and must so arrange, as long as can realize the sequential telescopic of three oil cylinders.
It should be noted that, in above-mentioned various embodiments, the first switch valve 6 adopts the 2/2-way valve, second switch valve 8 and the 3rd switch valve 9 adopt two-position three-way valve, but in other embodiments, each switch valve also can adopt other forms, as long as can realize the sequential telescopic of each oil cylinder.
It should be noted that, in above-mentioned various embodiment, can realize the sequential telescopic of three oil cylinders simultaneously, but in other embodiments, also can only realize the sequential telescopic of two oil cylinders, for example, the 3rd oil cylinder 3 and relevant hydraulic element (as the 3rd switch valve 9, Pilot operated check valve 12, relief valve 11 and one-way valve 10) thereof can be omitted, the scheme formed like this can realize the sequential telescopic control of the first oil cylinder 1 and the second oil cylinder 2, and can guarantee reliability.
It should be noted that, in above-mentioned various embodiment, selector valve 7 preferably adopts two four-way hydraulic control valve, it is condition controlled in the rodless cavity oil pressure of the first oil cylinder 1, but in other embodiments, selector valve 7 also can adopt other forms, and be not limited to the hydraulic control mode, as long as can realize the alternately commutation of the first oil cylinder 1 rodless cavity and the second oil cylinder 2 rodless cavities, so also can realize function of the present invention.
It should be noted that, in above-mentioned various embodiments, the three-position four-way valve that the preferred Median Function of main valve 4 is the Y type, but in other embodiments, can also adopt other forms, the three-position four-way valve that for example Median Function is the H type, as long as can realize function of the present invention.
Other embodiments of the invention also provide a kind of engineering machinery, hoist for example, and this project machinery is provided with the supporting leg hydraulic system, and this supporting leg hydraulic system adopts the described Multi-cylinder sequential telescopic of above-described embodiment hydraulic system.Because above-mentioned Multi-cylinder sequential telescopic hydraulic system has above-mentioned technique effect, therefore, this project machinery also should possess corresponding technique effect, the specific implementation process of its appropriate section is similar to the above embodiments, the specific implementation process of other parts can, referring to the associated description of prior art, hereby not repeat.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a Multi-cylinder sequential telescopic hydraulic system, comprise main valve (4), the first oil cylinder (1) and the second oil cylinder (2), it is characterized in that, also comprises the first switch valve (6), second switch valve (8) and selector valve (7), wherein:
The first actuator port of described main valve (4) and the second actuator port are connected to respectively the first hydraulic fluid port of described second switch valve (8) and the first hydraulic fluid port of described the first switch valve (6);
The filler opening of described selector valve (7) and return opening are connected to respectively the second hydraulic fluid port of described second switch valve (8) and the second hydraulic fluid port of described the first switch valve (6), and the first actuator port of described selector valve (7) and the second actuator port are connected to respectively the rodless cavity of described the second oil cylinder (2) and the rodless cavity of described the first oil cylinder (1);
The rod chamber of described the first oil cylinder (1) is connected to the rod chamber of described the second oil cylinder (2), and the rod chamber of described the first oil cylinder (1) is connected to the first hydraulic fluid port of described the first switch valve (6) or is connected to the second actuator port of described main valve (4).
2. Multi-cylinder sequential telescopic hydraulic system as claimed in claim 1, it is characterized in that, also comprise back pressure valve (5), described back pressure valve (5) is arranged on the oil circuit between the first hydraulic fluid port of the second actuator port of described main valve (4) and described the first switch valve (6).
3. Multi-cylinder sequential telescopic hydraulic system as claimed in claim 1, is characterized in that, described selector valve (7) is hydraulic control valve.
4. Multi-cylinder sequential telescopic hydraulic system as claimed in claim 3, it is characterized in that, the hydraulic control of described selector valve (7) is terminated at the rodless cavity of described the first oil cylinder (1), under the initialization state, the filler opening of described selector valve (7) is communicated in the first actuator port, and return opening is communicated in the second actuator port, under another kind of working state, the filler opening of described selector valve (7) is communicated in the second actuator port, and return opening is communicated in the first actuator port.
5. Multi-cylinder sequential telescopic hydraulic system as claimed in claim 1, is characterized in that, the three-position four-way valve that described main valve (4) is Y type or H type for Median Function.
6. Multi-cylinder sequential telescopic hydraulic system as described as claim 1 to 5 any one, is characterized in that, also comprises the 3rd oil cylinder (3) and the 3rd switch valve (9); Described second switch valve (8) and described the 3rd switch valve (9) are two-position three-way valve; The 3rd hydraulic fluid port of described second switch valve (8) is connected to the rodless cavity of described the 3rd oil cylinder (3), the rod chamber of described the 3rd oil cylinder (3) is connected to the first hydraulic fluid port of described the 3rd switch valve (9), and the second hydraulic fluid port of described the 3rd switch valve (9) and the 3rd hydraulic fluid port are connected to respectively the 3rd hydraulic fluid port of described second switch valve (8) and the second actuator port of described main valve (4).
7. Multi-cylinder sequential telescopic hydraulic system as claimed in claim 6, it is characterized in that, also comprise the Pilot operated check valve (12) on the oil circuit be arranged between described second switch valve (8) and described the 3rd oil cylinder (3), the free filler opening of described Pilot operated check valve (12) is connected to the 3rd hydraulic fluid port of described second switch valve (8), the free oil outlet of described Pilot operated check valve (12) is connected to the rodless cavity of described the 3rd oil cylinder (3), and the hydraulic control of described Pilot operated check valve (12) is terminated at the first hydraulic fluid port of described the 3rd switch valve (9).
8. Multi-cylinder sequential telescopic hydraulic system as claimed in claim 7, it is characterized in that, also comprise one-way valve (10) and relief valve (11) on the oil circuit be arranged between described the 3rd switch valve (9) and described the 3rd oil cylinder (3), the oil outlet of the filler opening of described one-way valve (10) and described relief valve (11) is connected to the first hydraulic fluid port of described the 3rd switch valve (9), and the filler opening of the oil outlet of described one-way valve (10) and described relief valve (11) is connected to the rod chamber of described the 3rd oil cylinder (3).
9. an engineering machinery, be provided with the supporting leg hydraulic system, it is characterized in that, described supporting leg hydraulic system is the described Multi-cylinder sequential telescopic of claim 1 to 8 any one hydraulic system.
10. engineering machinery as claimed in claim 9, is characterized in that, described engineering machinery is hoist.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310313783.4A CN103423221B (en) | 2013-07-24 | 2013-07-24 | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310313783.4A CN103423221B (en) | 2013-07-24 | 2013-07-24 | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103423221A true CN103423221A (en) | 2013-12-04 |
| CN103423221B CN103423221B (en) | 2015-10-28 |
Family
ID=49648445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310313783.4A Active CN103423221B (en) | 2013-07-24 | 2013-07-24 | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103423221B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801428A (en) * | 2014-01-27 | 2014-05-21 | 徐州徐工施维英机械有限公司 | Flat hammer hoisting device and crawler type crusher |
| CN103896155A (en) * | 2014-01-27 | 2014-07-02 | 徐州徐工随车起重机有限公司 | Hydraulic control system for controlling double cylinders to telescope sequentially, suspension arm mechanism and crane |
| CN104405293A (en) * | 2014-11-25 | 2015-03-11 | 中国石油天然气集团公司 | Automatic leveling system for hydraulic legs of drilling machine, use method and micro-controller thereof |
| CN106246632A (en) * | 2016-09-18 | 2016-12-21 | 上海衡拓船舶设备有限公司 | The spud leg fast lifting hydraulic circuit of hydraulic bolt formula jacking system |
| CN107461375A (en) * | 2017-08-31 | 2017-12-12 | 江苏凯宫隧道机械有限公司 | Complete-section tunnel boring machine is hinged hydraulic system |
| CN108317114A (en) * | 2018-03-28 | 2018-07-24 | 徐工集团工程机械有限公司 | A kind of automobile-used feeding equipment control system of sand throwing fire extinguishing |
| CN109396538A (en) * | 2018-11-15 | 2019-03-01 | 长沙思胜智能设备有限公司 | Horizontal broaching machine and its slide unit hydraulic system |
| CN110552926A (en) * | 2019-09-26 | 2019-12-10 | 长沙远大住宅工业集团股份有限公司 | hydraulic drive system |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3022591A1 (en) * | 1980-06-16 | 1982-03-04 | Heilmeier & Weinlein Fabrik für Oel-Hydraulik GmbH & Co KG, 8000 München | Adjustable stroke limiter for hydraulic crane rams - uses pressure sensitive or position dependent limit valve to operate slide control valve |
| CN2219284Y (en) * | 1995-04-17 | 1996-02-07 | 安徽省三色照明总公司 | Truck crane capable of sequentially telescoping telescopic gib arm |
| JP2001294393A (en) * | 2000-04-07 | 2001-10-23 | Tadano Ltd | Crane hook suspension length holding device |
| CN2601238Y (en) * | 2003-01-13 | 2004-01-28 | 安徽省三色照明股份有限公司 | Hydraulic controller for crane level supporting and upright support sequential extension action |
| JP2007223377A (en) * | 2006-02-21 | 2007-09-06 | Kobelco Cranes Co Ltd | Multi-shaft type vehicle |
| CN201818571U (en) * | 2010-09-27 | 2011-05-04 | 武桥重工集团股份有限公司 | Hydraulic system controlling two oil cylinders to sequentially telescope |
| CN102134044A (en) * | 2010-12-20 | 2011-07-27 | 长治清华机械厂 | Suspension arm sequential stretching/retracting hydraulic system |
| CN202326479U (en) * | 2011-11-17 | 2012-07-11 | 湖南特力液压有限公司 | Hydraulic sequential control system and hydraulic control sequential telescoping mechanism |
| CN102717844A (en) * | 2012-07-05 | 2012-10-10 | 中联重科股份有限公司渭南分公司 | Hydraulic crawler tensioning device, crawler tensioning method and crawler engineering machinery |
| CN103010976A (en) * | 2012-12-17 | 2013-04-03 | 中联重科股份有限公司 | Hydraulic system for controlling oil cylinder to stretch out and draw back in sequence, horizontal supporting leg system and engineering machinery |
-
2013
- 2013-07-24 CN CN201310313783.4A patent/CN103423221B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3022591A1 (en) * | 1980-06-16 | 1982-03-04 | Heilmeier & Weinlein Fabrik für Oel-Hydraulik GmbH & Co KG, 8000 München | Adjustable stroke limiter for hydraulic crane rams - uses pressure sensitive or position dependent limit valve to operate slide control valve |
| CN2219284Y (en) * | 1995-04-17 | 1996-02-07 | 安徽省三色照明总公司 | Truck crane capable of sequentially telescoping telescopic gib arm |
| JP2001294393A (en) * | 2000-04-07 | 2001-10-23 | Tadano Ltd | Crane hook suspension length holding device |
| CN2601238Y (en) * | 2003-01-13 | 2004-01-28 | 安徽省三色照明股份有限公司 | Hydraulic controller for crane level supporting and upright support sequential extension action |
| JP2007223377A (en) * | 2006-02-21 | 2007-09-06 | Kobelco Cranes Co Ltd | Multi-shaft type vehicle |
| CN201818571U (en) * | 2010-09-27 | 2011-05-04 | 武桥重工集团股份有限公司 | Hydraulic system controlling two oil cylinders to sequentially telescope |
| CN102134044A (en) * | 2010-12-20 | 2011-07-27 | 长治清华机械厂 | Suspension arm sequential stretching/retracting hydraulic system |
| CN202326479U (en) * | 2011-11-17 | 2012-07-11 | 湖南特力液压有限公司 | Hydraulic sequential control system and hydraulic control sequential telescoping mechanism |
| CN102717844A (en) * | 2012-07-05 | 2012-10-10 | 中联重科股份有限公司渭南分公司 | Hydraulic crawler tensioning device, crawler tensioning method and crawler engineering machinery |
| CN103010976A (en) * | 2012-12-17 | 2013-04-03 | 中联重科股份有限公司 | Hydraulic system for controlling oil cylinder to stretch out and draw back in sequence, horizontal supporting leg system and engineering machinery |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801428A (en) * | 2014-01-27 | 2014-05-21 | 徐州徐工施维英机械有限公司 | Flat hammer hoisting device and crawler type crusher |
| CN103896155A (en) * | 2014-01-27 | 2014-07-02 | 徐州徐工随车起重机有限公司 | Hydraulic control system for controlling double cylinders to telescope sequentially, suspension arm mechanism and crane |
| CN103801428B (en) * | 2014-01-27 | 2016-03-02 | 徐州徐工施维英机械有限公司 | Boards hammer lifting device and crawler type disintegrating machine |
| CN104405293A (en) * | 2014-11-25 | 2015-03-11 | 中国石油天然气集团公司 | Automatic leveling system for hydraulic legs of drilling machine, use method and micro-controller thereof |
| CN106246632A (en) * | 2016-09-18 | 2016-12-21 | 上海衡拓船舶设备有限公司 | The spud leg fast lifting hydraulic circuit of hydraulic bolt formula jacking system |
| CN106246632B (en) * | 2016-09-18 | 2017-12-15 | 上海衡拓船舶设备有限公司 | The spud leg fast lifting hydraulic circuit of hydraulic bolt formula jacking system |
| CN107461375A (en) * | 2017-08-31 | 2017-12-12 | 江苏凯宫隧道机械有限公司 | Complete-section tunnel boring machine is hinged hydraulic system |
| CN107461375B (en) * | 2017-08-31 | 2023-09-22 | 江苏凯宫隧道机械有限公司 | Full-face tunnel boring machine articulated hydraulic system |
| CN108317114A (en) * | 2018-03-28 | 2018-07-24 | 徐工集团工程机械有限公司 | A kind of automobile-used feeding equipment control system of sand throwing fire extinguishing |
| CN108317114B (en) * | 2018-03-28 | 2023-11-03 | 江苏徐工工程机械研究院有限公司 | Feeding device control system for sand throwing fire extinguishing vehicle |
| CN109396538A (en) * | 2018-11-15 | 2019-03-01 | 长沙思胜智能设备有限公司 | Horizontal broaching machine and its slide unit hydraulic system |
| CN110552926A (en) * | 2019-09-26 | 2019-12-10 | 长沙远大住宅工业集团股份有限公司 | hydraulic drive system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103423221B (en) | 2015-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103423221B (en) | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machinery | |
| CN102996553B (en) | Support leg hydraulic system and engineering machinery | |
| CN102673639B (en) | Hydraulic steering control system and crane with system | |
| CN102705275B (en) | Hydraulic control system for bolt and engineering machinery | |
| WO2013091425A1 (en) | Bolt mechanism control system and crane | |
| CN104088837A (en) | Oil cylinder sequential action hydraulic control system and engineering machinery device | |
| CN102303813B (en) | Crane support leg, support leg hydraulic system and crane | |
| CN102619805B (en) | Hydraulic cylinder suitable for controlling plurality of hydraulic cylinders to extend sequentially | |
| CN102425582B (en) | Hydraulic control valve and getting-off support leg control system of firefighting vehicle with hydraulic control valve | |
| CN105351279A (en) | Pumping device and pumping hydraulic system thereof | |
| CN104444866B (en) | The control system of telescoping mechanism and there is its crane | |
| CN104591014A (en) | Telescopic cylinder, landing leg control system and crane | |
| CN204003700U (en) | Oil cylinder sequentially-operating hydraulic control system and engineering mechanical device | |
| CN104389830A (en) | Intelligent synchronous type hydraulic hoist | |
| CN202326479U (en) | Hydraulic sequential control system and hydraulic control sequential telescoping mechanism | |
| CN104061199A (en) | Crane, single-cylinder bolt type telescopic boom and bolt mechanism hydraulic system thereof | |
| CN202418066U (en) | Hydraulic system and concrete equipment | |
| CN104481944B (en) | Depressurizing system and engineering machinery | |
| CN103552597A (en) | Hydraulic steering system and road roller | |
| CN103030065B (en) | Hydraulic locking control system, hydraulic assembly of crane, and crane | |
| CN202988589U (en) | Closed type hydraulic system using changeover valve set | |
| CN206054411U (en) | The hydraulic control system and single-cylinder bolt type telescopic boom of single-cylinder bolt type telescopic boom | |
| CN205260466U (en) | Fork sword action hydraulic system and fork truck | |
| CN204003684U (en) | Hoist, single-cylinder bolt type telescopic boom and bolt mechanism hydraulic system thereof | |
| CN204113775U (en) | A kind of lifting machine fluid pressure drive device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |