CN202707689U - Hinged hydraulic system and shield tunneling machine - Google Patents
Hinged hydraulic system and shield tunneling machine Download PDFInfo
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- CN202707689U CN202707689U CN 201220297699 CN201220297699U CN202707689U CN 202707689 U CN202707689 U CN 202707689U CN 201220297699 CN201220297699 CN 201220297699 CN 201220297699 U CN201220297699 U CN 201220297699U CN 202707689 U CN202707689 U CN 202707689U
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Abstract
The utility model relates to the technical field of machinery and discloses a hinged hydraulic system and a shield tunneling machine. The hinged hydraulic system comprises a main oil inlet circuit, a main oil return circuit, a main valve, a hydraulic lock, a hinged oil cylinder, an extension oil inlet circuit and an extension oil return circuit. The main oil inlet circuit and the main oil return circuit are connected with a cavity with a rod and a cavity without any rod of the hinged oil cylinder through the main valve and the hydraulic lock. The extension oil inlet circuit is communicated with the cavity without any rod and the extension oil return circuit is communicated with the cavity with the rod. The hinged hydraulic system can not only achieve positive extending of the hinged oil cylinder, but also achieve follow-up extending of the hinged oil cylinder and during the entire process, no exceeded pressure occurs to the cavity with the rod or the cavity without any rod. Thus, the service life of the hinged oil cylinder is prolonged. Besides, the hinged hydraulic system is further provided with a pressurizing oil circuit and a pressure control valve set.
Description
Technical field
The utility model relates to field of mechanical technique, particularly a kind of hinged hydraulic system and shield machine.
Background technique
Shield machine is one of most widely used equipment in the present tunnelling works, in order to improve the sensitivity of shield machine in work progress, when shield machine designs, need in the middle of the shield shell, add articulated mounting, be used for the correction of shield machine tunneling direction, with turning, the curve of finishing shield machine advance, attitude is controlled and be synchronized with the movement, and shield machine can be advanced along the route that sets in advance.
The articulated manner of shield machine is generally following two kinds: initiatively hinged and passive hinged.Passive hinging structure is simple, but very flexible; And initiatively hinging structure is complicated, and flexibility is good.At present, initiatively the control of articulated system generally is divided into four districts, upper and lower, left and right, and each district comprises four hinged oil cylinders, and by one group of identical circuit controls, this loop is generally the control loop that is comprised of solenoid valve and hydraulic lock etc.In the hinged hydraulic system of existing a kind of active, can only realize the servo-actuated retraction of hinged oil cylinder, can't realize the servo-actuated action of stretching out.
Therefore, how improving for existing hinged hydraulic system, use needs in order to more adapt to, is the technical barrier that those skilled in the art need to be resolved hurrily.
The model utility content
In view of this, the utility model aims to provide a kind of hinged hydraulic system and shield machine, can't realize servo-actuated problem of stretching out to solve existing hinged hydraulic system.
On the one hand, the utility model provides a kind of hinged hydraulic system, this hinged hydraulic system comprises main oil-feed oil circuit, main oil return circuit, main valve, hydraulic lock and hinged oil cylinder, described main oil-feed oil circuit links to each other with rodless cavity with the rod chamber of described hinged oil cylinder by described main valve, described hydraulic lock with described main oil return circuit, described hinged hydraulic system also comprises stretches out the oil-feed oil circuit and stretches out oil return circuit, the described oil-feed oil circuit that stretches out is connected with described rodless cavity, and the described oil return circuit that stretches out is connected with described rod chamber.
Further, the described oil-feed oil circuit that stretches out comprises the first one-way valve, and the outlet end of described the first one-way valve is connected with described rodless cavity, and the entry end of described the first one-way valve is connected with described main oil return circuit.
Further, the described oil return circuit that stretches out comprises the second one-way valve and the first switch valve, and the entry end of described the second one-way valve is connected with described rod chamber, and the outlet end of described the second one-way valve links to each other with fuel tank by described the first switch valve.
Further, described hinged hydraulic system also comprises retraction oil-feed oil circuit and retraction oil return circuit, and described retraction oil-feed oil circuit is connected with described rod chamber, and described retraction oil return circuit is connected with described rodless cavity.
Further, described retraction oil return circuit comprises the first Pilot operated check valve and back pressure valve, and the entry end of described the first Pilot operated check valve is connected with described rodless cavity, and the outlet end of described the first Pilot operated check valve links to each other with fuel tank by described back pressure valve; Described retraction oil-feed oil circuit comprises the second Pilot operated check valve, and the entry end of described the second Pilot operated check valve is connected with described rod chamber, and the outlet end of described the second Pilot operated check valve is connected with described main oil return circuit; Described hinged hydraulic system also comprises oil circuit control, and the control port of described the first Pilot operated check valve and described the second Pilot operated check valve is connected in described oil circuit control.
Further, the entry end of described oil circuit control is connected with described main oil-feed oil circuit or described main oil return circuit by the first selector valve.
Further, described hinged hydraulic system also comprises safety circuit, described safety circuit comprises the 3rd one-way valve, the 4th one-way valve and the first relief valve, the entry end of described the 3rd one-way valve is connected with described rodless cavity, the entry end of described the 4th one-way valve is connected with described rod chamber, links to each other with described the first relief valve after the outlet end of described the 3rd one-way valve and described the 4th one-way valve links to each other.
Further, described hinged hydraulic system also comprises supercharging oil sources and Pressure Increasing Oil-Line, and an end of described Pressure Increasing Oil-Line links to each other with described rodless cavity, and the other end of described Pressure Increasing Oil-Line links to each other with the supercharging oil sources.
Further, described Pressure Increasing Oil-Line comprises the 5th one-way valve and second switch valve, and the outlet end of described the 5th one-way valve is connected with described rodless cavity, and the entry end of described the 5th one-way valve links to each other with described supercharging oil sources by described second switch valve.
Further, the pressure oil of described supercharging oil sources comes from described main oil-feed oil circuit.
Further, described hinged hydraulic system comprises the pressure controlled valve group that is arranged on the described main oil-feed oil circuit; Described pressure controlled valve group comprises the second relief valve, the second selector valve and the 3rd relief valve that links to each other with described the second relief valve by described the second selector valve; The filler opening of described the second relief valve is connected with described main oil-feed oil circuit, the oil outlet of described the second relief valve and described the 3rd relief valve all leads to fuel tank, described the second selector valve has three kinds of working staties, under the first working state, the filler opening of described the 3rd relief valve and oil outlet all lead to fuel tank, under the second working state, the spring side hydraulic fluid port of described the second relief valve, the filler opening of described the 3rd relief valve and oil outlet all lead to fuel tank, under the third working state, the spring side hydraulic fluid port of described the second relief valve is connected with the filler opening of described the 3rd relief valve.
Further, described hinged hydraulic system also comprises bleed-off circuit; Described bleed-off circuit comprises stop valve and the one-way speed-regulating valve that is connected in successively between described main oil-feed oil circuit and the fuel tank.
On the other hand, the utility model also provides a kind of shield machine, and described shield machine is provided with above-mentioned each described hinged hydraulic system.
A kind of hinged hydraulic system that the utility model provides, be connected with at the rodless cavity of its hinged oil cylinder and stretch out the oil-feed oil circuit, and rod chamber is connected with and stretches out oil return circuit, when hinged oil cylinder is in servo-actuated state, the piston rod of hinged oil cylinder stretches out under the effect of external force, at this moment, the rodless cavity of hinged oil cylinder can be from stretching out the oil suction of oil-feed oil circuit to realize repairing, and the pressure oil in the rod chamber of hinged oil cylinder stretches out oil return circuit with the flow direction, thereby realized that the servo-actuated of hinged oil cylinder stretch out, rod chamber or the excessive situation of rodless cavity oil pressure can not occur in the whole process, the working life of having improved hinged oil cylinder.In addition, in a kind of concrete scheme, this hinged hydraulic system also has retraction oil-feed oil circuit and retraction oil return circuit, and then has realized that simultaneously the servo-actuated of hinged oil cylinder stretch out and two kinds of actions of servo-actuated retraction, has improved flexibility.In another kind of concrete scheme, this hinged hydraulic system also has Pressure Increasing Oil-Line, and this Pressure Increasing Oil-Line can be pressurizeed in rodless cavity after hinged oil cylinder execution, to guarantee having enough pressure in the rodless cavity.In another concrete scheme, this hinged hydraulic system also has the pressure controlled valve group, can realize two kinds of overflows under the pressure condition, wherein a kind of is system's pressure maximum under the articulation pattern, another kind of for after the realization turning oil cylinder being carried out system's pressure maximum of pressure maintaining effect, so be provided with and help reduce energy loss.In another concrete scheme, this hinged hydraulic system also has bleed-off circuit, in order in time regulate as required the stretching speed of hinged oil cylinder.
A kind of shield machine that the utility model provides is provided with above-mentioned hinged hydraulic system, because above-mentioned hinged hydraulic system has above-mentioned technique effect, therefore, this shield machine also has corresponding technique effect.
Description of drawings
The accompanying drawing that consists of a part of the present utility model is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
A kind of principle schematic that is applied to the hinged hydraulic system of shield machine that Fig. 1 provides for the utility model embodiment;
Fig. 2 is the principle schematic of pressure controlled valve group among Fig. 1;
Fig. 3 is the principle schematic of stretching out oil return circuit among Fig. 1;
Fig. 4 is the principle schematic of Pressure Increasing Oil-Line among Fig. 1.
Embodiment
Should be pointed out that in this part that to the description of concrete structure and description order only be explanation to specific embodiment, should not be considered as that protection domain of the present utility model is had any restriction.In addition, in the situation of not conflicting, embodiment and the feature among the embodiment in the utility model can make up mutually.
Please refer to Fig. 1, and simultaneously in conjunction with Fig. 2, Fig. 3 and Fig. 4, below in conjunction with the drawings and specific embodiments the utility model is elaborated.
As shown in the figure, this embodiment's hinged hydraulic system mainly comprise fuel tank 1, variable displacement pump 2, pressure controlled valve group, bleed-off circuit, main oil-feed oil circuit 001, main oil return circuit 002, main valve 11, hydraulic lock 12, hinged oil cylinder N0.1 and N0.2, stretch out oil return circuit, stretch out the oil-feed oil circuit, retraction oil return circuit, retraction oil-feed oil circuit and Pressure Increasing Oil-Line etc.
Wherein, variable displacement pump 2 can be selected axial piston pump, the filler opening of variable displacement pump 2 communicates with fuel tank 1, oil outlet links to each other with main oil-feed oil circuit 001 by one-way valve 3, the entry end of one-way valve 3 is connected with the oil outlet of variable displacement pump 2, outlet end is connected with main oil-feed oil circuit 001, and one-way valve 3 can prevent that the hydraulic oil of main oil-feed oil circuit 001 from flowing back in the variable displacement pump 2 and then to it and cause damage.
Main oil return circuit 002 leads to fuel tank 1, main oil-feed oil circuit 001 links to each other with rod chamber with the rodless cavity of hinged oil cylinder NO.2 by main valve 11, hydraulic lock 12 with main oil return circuit 002, and the rodless cavity of hinged oil cylinder NO.1 and hinged oil cylinder NO.2 and rod chamber are connected respectively; Main valve 11 is preferably the three position four-way electromagnetic valve that Median Function is the Y type (as shown in the figure situation), when main valve 11 is operated in a position (namely scheming left position), the pressure oil of main oil-feed oil circuit 001 leads to the rod chamber of each hinged oil cylinder behind the right Pilot operated check valve of main valve 11, hydraulic lock 12, meanwhile, pressure oil in the rodless cavity of each hinged oil cylinder will lead to main oil return circuit 002 behind the Pilot operated check valve of hydraulic lock 12, main valve 11, concrete structure, Placement and principle about hydraulic lock can referring to the associated description of prior art, not given unnecessary details hereby.
Being used for the servo-actuated oil-feed oil circuit that stretches out that stretches out under the state is connected with the rodless cavity of hinged oil cylinder N0.2, preferably, this stretches out the oil-feed oil circuit and comprises that the outlet end of the first one-way valve 26, the first one-way valves 26 is connected with the rodless cavity of hinged oil cylinder N0.2, and entry end is connected with main oil return circuit 002; Be connected with the rod chamber of hinged oil cylinder N0.2 and be used for the servo-actuated oil return circuit that stretches out that stretches out under the state, preferably, this stretches out oil return circuit and comprises the second one-way valve 25 and the first switch valve 24, the first switch valve 24 can be selected two-position two-way solenoid valve (as shown in Figure 3), the entry end of the second one-way valve 25 is connected with the rod chamber of hinged oil cylinder N0.2, outlet end links to each other with fuel tank by the first switch valve 24, and the first switch valve 24 is normally off; When system works under servo-actuated state, and when the piston rod of hinged oil cylinder stretches out under the effect of external force, controlling the first switch valve 24 gets electric, at this moment, the rodless cavity of hinged oil cylinder will be by the first one-way valve 26, main oil return circuit 002 oil suction from fuel tank 1, with the repairing of realization rodless cavity, and the hydraulic oil in the rod chamber of hinged oil cylinder will flow to fuel tank 1 by the second one-way valve 25, the first switch valve 24, thereby realize oil return.
The retraction oil return circuit that is used under the servo-actuated retracted mode is connected with the rodless cavity of hinged oil cylinder N0.2, preferably, this retraction oil return circuit comprises the first Pilot operated check valve 22A and back pressure valve 23, the entry end of the first Pilot operated check valve 22A is connected with the rodless cavity of hinged oil cylinder N0.2, and outlet end links to each other with fuel tank 1 by back pressure valve 23; The retraction oil-feed oil circuit that is used under the servo-actuated retracted mode is connected with the rod chamber of hinged oil cylinder N0.2, preferably, this retraction oil-feed oil circuit comprises the second Pilot operated check valve 22B, the entry end of the second Pilot operated check valve 22B is connected with the rod chamber of hinged oil cylinder N0.2, and outlet end is connected with main oil return circuit 002; The control port of the first Pilot operated check valve 22A and the second Pilot operated check valve 22B is connected on the oil circuit control 003, preferably, the entry end of oil circuit control 003 is connected with main oil-feed oil circuit 001 or main oil return circuit 002 by the first selector valve 21, the first selector valve 21 can be selected two-position three way magnetic valve, when the first selector valve 21 is operated in left position, oil circuit control 003 is connected with main oil return circuit 002, at this moment, the pressure oil of oil circuit control 003 will flow to fuel tank 1 by main oil return circuit 003, the first Pilot operated check valve 22A and the second Pilot operated check valve 22B are closed, when the first selector valve 21 is operated in right position, oil circuit control 003 is connected with main oil-feed oil circuit 001, the pressure oil of oil circuit control 003 will be to the control port topping up of the first Pilot operated check valve 22A and the second Pilot operated check valve 22B, the first Pilot operated check valve 22A and the second Pilot operated check valve 22B are opened, namely can change the on off state of the first Pilot operated check valve 22A and the second Pilot operated check valve 22B by the working position of controlling the first selector valve 21; When system works under servo-actuated state, and when the piston rod of hinged oil cylinder is retracted under the effect of external force, can control the first selector valve 21 gets electric, this moment, the first selector valve 21 was operated in right position, the first Pilot operated check valve 22A and the second Pilot operated check valve 22B are in open mode, pressure oil in the rodless cavity of hinged oil cylinder will flow to fuel tank by the first Pilot operated check valve 22A, back pressure valve 23, to realize oil return, and rod chamber will be by the second Pilot operated check valve 22B, main oil return circuit 002 oil suction from fuel tank 1, to realize repairing.
When oil pressure is excessive on the pipeline that safety circuit is used for rodless cavity or the rod chamber of hinged oil cylinder are connected, release too much pressure oil to fuel tank 1, preferably, safety circuit comprises the 3rd one-way valve 13A, the 4th one-way valve 13B and the first relief valve 14, wherein, the entry end of the 3rd one-way valve 13A is connected with the rodless cavity of hinged oil cylinder, the entry end of the 4th one-way valve 13B is connected with the rod chamber of hinged oil cylinder, after linking to each other, the outlet end of the 3rd one-way valve 13A and the 4th one-way valve 13B links to each other with the filler opening of the first relief valve 14, the oil outlet of the first relief valve 14 leads to fuel tank 1, in the course of the work, if the rodless cavity of hinged oil cylinder and with pipeline that rodless cavity is connected on oil pressure when excessive, pressure oil will be by the 3rd one-way valve 13A, the first relief valve 14 is let out to fuel tank 1, if the rod chamber of hinged oil cylinder or with pipeline that rod chamber is connected on oil pressure when excessive, pressure oil is by the 4th one-way valve 13B, the first relief valve 14 is let out to fuel tank 1.Link to each other with the first relief valve 14 by two one-way valves and to realize overflow, not only simple in structure, and also cost is lower.
Pressure Increasing Oil-Line is used for after hinged oil cylinder execution (stretch out or retracts) (namely after shield machine realization turning), to hinged oil cylinder pressurization, with the angle that guarantees that shield machine is turned, thereby guarantee that shield machine can accurately turn according to construction requirement, preferably, Pressure Increasing Oil-Line comprises the 5th one-way valve 20 and second switch valve 17, the outlet end of the 5th one-way valve 20 is connected with the rodless cavity of hinged oil cylinder, entry end links to each other with main oil-feed oil circuit 001 by second switch valve 17, second switch valve 17 can be selected two-position two-way solenoid valve, when second switch sends out 17 when being operated in left position (being under the normally off), Pressure Increasing Oil-Line and main oil-feed oil circuit 001 disconnect, when second switch valve 17 is operated in right position (namely getting under the electricity condition), Pressure Increasing Oil-Line is connected with main oil-feed oil circuit 001, thereby to the rodless cavity supply pressure oil of hinged oil cylinder, realize the pressurization to rodless cavity, namely the rodless cavity of hinged oil cylinder played pressure maintaining effect.
When hinged oil cylinder has the initiative flexible state, the flow of main oil-feed oil circuit 001 will affect the stretching speed of hinged oil cylinder, bleed-off circuit is used for main oil-feed oil circuit 001 is carried out throttling, so that the operator in time regulates the stretching speed of hinged oil cylinder according to the soil property situation at scene, preferably, bleed-off circuit comprises stop valve 9 and one-way speed-regulating valve 10, one of stop valve 9 is terminated at main oil-feed oil circuit 001, the other end links to each other with the P2 mouth of one-way speed-regulating valve 10, and the T2 mouth of one-way speed-regulating valve 10 leads to fuel tank 1.
The pressure controlled valve group is arranged on the main oil-feed oil circuit 001, can realize two kinds of overflows under the pressure, pressure maximum when wherein a kind of pressure is flexible corresponding to hinged oil cylinder on master's oil-feed oil circuit 001, another kind of pressure corresponding to after hinged oil cylinder execution (be shield machine finish turn after) rodless cavity of hinged oil cylinder is carried out the pressure maximum of pressure maintaining effect.Preferably, pressure controlled valve comprises the second relief valve 7, the second selector valve 6 and the 3rd relief valve 8 that links to each other with the second relief valve 7 by the second selector valve 6, the second selector valve 6 can be selected three position four-way electromagnetic valve (as shown in Figure 2), one of them hydraulic fluid port sealing, the filler opening of the second relief valve 7 is connected with main oil-feed oil circuit 001, the oil outlet of the second relief valve 7 and the 3rd relief valve 8 all leads to fuel tank 1, when the second selector valve 6 is operated in a position (being left position), the filler opening of the 3rd relief valve 8 and oil outlet all lead to fuel tank 1, when the second selector valve 6 is operated in meta, the spring side hydraulic fluid port of the second relief valve 7, the filler opening of the 3rd relief valve 8 and oil outlet all lead to fuel tank 1, at this moment, can carry out off-load to system, when the second selector valve 6 was operated in b position (being right position), the spring side hydraulic fluid port of the second relief valve 8 was connected with the filler opening of the 3rd relief valve 8.
The working principle of the hinged hydraulic system of above-described embodiment is as follows:
This hinged hydraulic system has articulation pattern and pressurize pattern.
Under articulation pattern, if hinged oil cylinder works in the state that initiatively stretches, work in a position or b position by control main valve 11, make the rod chamber oil return of hinged oil cylinder, rodless cavity oil-feed or make the rod chamber oil-feed of hinged oil cylinder, the rodless cavity oil return, can realize that the active of hinged oil cylinder stretches out or the action of retracting, if hinged oil cylinder works in the follow-up telescoping state, at this moment, main valve 11 works in meta, hydraulic lock locking working connection, when the piston rod of hinged oil cylinder is passive when stretching out, control the first switch valve 24 and get electric (namely working in right position), at this moment, pressure oil in the hinged cylinder rod chamber will lead to and stretch out oil return circuit and realize oil return, namely successively by the second one-way valve 25, lead to fuel tank behind the first switch valve 24, and will realize repairing by stretching out the oil-feed oil circuit in the rodless cavity, by the first one-way valve 26, main oil return circuit 002 is from fuel tank 1 oil suction, to realize repairing, when the passive retraction of the piston rod of hinged oil cylinder, control the first selector valve 21 and get electric (namely being operated in right position), at this moment, pressure oil in the hinged oil cylinder rodless cavity will lead to the retraction oil return circuit realizes oil return, namely by leading to fuel tank 1 behind the first Pilot operated check valve 22A and the back pressure valve 23, rod chamber will be realized repairing by retraction oil-feed oil circuit, namely by the second Pilot operated check valve 22B, main oil return circuit 002 is from fuel tank 1 oil suction, to realize repairing.
Under articulation pattern, in the pressure controlled valve group, the second selector valve 6 works in a position, the spring side hydraulic fluid port that communicates with its filler opening on the second relief valve 7 is in cut-off state, at this moment, the 3rd relief valve 8 is inoperative, the second relief valve 7 works separately, affect if the oil pressure on the main oil return circuit 002 is excessive when safe, too much pressure oil will be from 7 overflows of the second relief valve to fuel tank 1, this shows the pressure maximum the when pressure threshold of the second relief valve 7 is flexible corresponding to hinged oil cylinder on master's oil-feed oil circuit 001.
After if hinged oil cylinder is finished expanding-contracting action (no matter initiatively or passive), namely after shield machine is finished turning, hinged hydraulic work system is under the pressurize pattern, at this moment, main valve 11 works in meta, the first switch valve 24, the first selector valve 21 equal dead electricity, second switch valve 17 gets electric, the pressure oil of main oil-feed oil circuit 001 will lead to by Pressure Increasing Oil-Line the rodless cavity of hinged oil cylinder, and then the rodless cavity of hinged oil cylinder played pressure maintaining effect, guaranteeing the angle of turn of shield machine, thereby guarantee that shield machine can turn according to construction requirement exactly.
Under the pressurize pattern, control the second selector valve 6 and work in the b position, at this moment, the spring side hydraulic fluid port that communicates with its filler opening on the second relief valve 7 leads to outward in the filler opening of the 3rd relief valve 8, under this situation, the second relief valve 7 is inoperative, and the 3rd relief valve 8 works, affect if the oil pressure on the main oil return circuit 002 is excessive when safe, too much pressure oil will be from 8 overflows of the 3rd relief valve to fuel tank 1, this shows that the pressure threshold of the 3rd relief valve 8 is the pressure maximum on master's oil-feed oil circuit 001 when (be shield machine finish turn after) carries out pressure maintaining effect to the rodless cavity of hinged oil cylinder after hinged oil cylinder execution.
In above-described embodiment, in the specific implementation, can also do following decision design: the second relief valve 7, the second selector valve 6 and the 3rd relief valve 8 can be integrated on the valve piece A, and the filler opening of the second relief valve 7 links to each other in main oil-feed oil circuit 001 by the P1 mouth of valve piece A; Main valve 11, hydraulic lock 12, the first one-way valve 26, the 3rd one-way valve 13A, the 4th one-way valve 13B, the first Pilot operated check valve 22A and the second Pilot operated check valve 22B can be integrated on the valve piece B, second switch valve 17 can be integrated on the valve piece C, the first selector valve 21 can be integrated on the valve piece D, and the first switch valve 24 can be integrated on the valve piece E; The filler opening of main valve 11 links to each other with main oil return circuit 002 with main oil-feed oil circuit 001 with the T mouth by the P mouth on the valve piece B respectively with return opening, and the rodless cavity of hinged oil cylinder N0.2 links to each other with the B mouth respectively at the A mouth on the valve piece B with rod chamber; The control port of the first Pilot operated check valve 22A and the second Pilot operated check valve 22B links to each other with oil circuit control 003 by the B3 mouth on the valve piece B, the entry end of oil circuit control 003 links to each other with A3 mouth on the valve piece D, and the P3 mouth on the valve piece D links to each other with main oil return circuit 002 with main oil-feed oil circuit 001 respectively with the T3 mouth; The outlet end of the second one-way valve 25 links to each other with B2 mouth on the valve piece E, and the A2 mouth on the valve piece E leads to fuel tank 1; The entry end of the 5th one-way valve 20 links to each other with the B1 mouth of valve piece C, and the A1 mouth of valve piece C links to each other with main oil-feed oil circuit 001.
In above-described embodiment, can also do following decision design: for convenient for maintaining, can with the pipeline that valve piece B is connected stop valve 15A and 15B be set with rod chamber at the rodless cavity of hinged oil cylinder N0.2, also can stop valve 16A and 16B be set at the rodless cavity of hinged oil cylinder N0.1 and the opposite side interface of rod chamber.
In above-described embodiment, adopt a cover hydraulic system to drive two hinged oil cylinders, in other embodiments, also can drive as required one or two above hinged oil cylinders.
Among the above-mentioned various embodiment, the pressure oil of oil circuit control 003 obtains from main oil-feed oil circuit 001 by the first selector valve 21, and in other embodiments, the oil sources that also can pass through as required other obtains.
Among the above-mentioned various embodiment, the pressure oil of Pressure Increasing Oil-Line obtains from main oil-feed oil circuit 001 by second switch valve 17, in other embodiments, also can obtain by the supercharging oil sources of second switch valve 17 from other as required.
Among the above-mentioned various embodiment, stretch out the oil-feed oil circuit in conjunction with having provided shown in the figure, stretch out oil return circuit, the preferred embodiment of retraction oil-feed oil circuit and retraction oil return circuit, in other embodiments, these several oil circuits also can adopt other modes to realize, as long as can realize above-mentioned corresponding function.
Need to prove, in order to realize that hinged hydraulic system has function as much as possible, to guarantee the turn performance of shield machine, each optimal way of above-mentioned various embodiments improves and optimizates whole hinged hydraulic system from all angles, but and do not mean that other embodiments of the present utility model all comprise above-mentioned various optimal way, in other embodiments, under the situation of not conflicting, also can adopt as required wherein one or more.
A kind of hinged hydraulic system that the utility model embodiment provides, be connected with at the rodless cavity of its hinged oil cylinder and stretch out the oil-feed oil circuit, and rod chamber is connected with and stretches out oil return circuit, when hinged oil cylinder is in servo-actuated state, the piston rod of hinged oil cylinder stretches out under the effect of external force, at this moment, the rodless cavity of hinged oil cylinder can be from stretching out the oil suction of oil-feed oil circuit to realize repairing, and the pressure oil in the rod chamber of hinged oil cylinder stretches out oil return circuit with the flow direction, thereby realized that the servo-actuated of hinged oil cylinder stretch out, rod chamber or the excessive situation of rodless cavity oil pressure can not occur in the whole process, the working life of having improved hinged oil cylinder.In addition, this hinged hydraulic system also has retraction oil-feed oil circuit and retraction oil return circuit, and then has realized that simultaneously the servo-actuated of hinged oil cylinder stretch out and two kinds of actions of servo-actuated retraction, has improved flexibility.In addition, this hinged hydraulic system also has Pressure Increasing Oil-Line, and this Pressure Increasing Oil-Line can be pressurizeed in rodless cavity after hinged oil cylinder execution, to guarantee having enough pressure in the rodless cavity, guarantee the angle that shield machine is turned, thereby guarantee that shield machine can accurately turn according to construction requirement.In addition, this hinged hydraulic system also has the pressure controlled valve group, can realize two kinds of overflows under the pressure condition, and wherein a kind of is system's pressure maximum under the articulation pattern, another kind of for after the realization turning oil cylinder being carried out system's pressure maximum of pressure maintaining effect, so be provided with and help reduce energy loss.In addition, this hinged hydraulic system also has bleed-off circuit, so that operator in time regulate the stretching speed of hinged oil cylinder according to on-the-spot needs.
The utility model embodiment also provides a kind of shield machine, such as the described shield machine of above-mentioned embodiment, this shield machine is provided with above-mentioned hinged hydraulic system, because above-mentioned hinged hydraulic system has above-mentioned technique effect, therefore, this shield machine also should possess corresponding technique effect.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (13)
1. hinged hydraulic system, comprise main oil-feed oil circuit (001), main oil return circuit (002), main valve (11), hydraulic lock (12) and hinged oil cylinder, described main oil-feed oil circuit (001) links to each other with rodless cavity with the rod chamber of described hinged oil cylinder by described main valve (11), described hydraulic lock (12) with described main oil return circuit (002), it is characterized in that: described hinged hydraulic system also comprises stretches out the oil-feed oil circuit and stretches out oil return circuit, the described oil-feed oil circuit that stretches out is connected with described rodless cavity, and the described oil return circuit that stretches out is connected with described rod chamber.
2. hinged hydraulic system as claimed in claim 1, it is characterized in that: the described oil-feed oil circuit that stretches out comprises the first one-way valve (26), the outlet end of described the first one-way valve (26) is connected with described rodless cavity, and the entry end of described the first one-way valve (26) is connected with described main oil return circuit (002).
3. hinged hydraulic system as claimed in claim 1, it is characterized in that: the described oil return circuit that stretches out comprises the second one-way valve (25) and the first switch valve (24), the entry end of described the second one-way valve (25) is connected with described rod chamber, and the outlet end of described the second one-way valve (25) links to each other with fuel tank (1) by described the first switch valve (24).
4. hinged hydraulic system as claimed in claim 1, it is characterized in that: described hinged hydraulic system also comprises retraction oil-feed oil circuit and retraction oil return circuit, described retraction oil-feed oil circuit is connected with described rod chamber, and described retraction oil return circuit is connected with described rodless cavity.
5. hinged hydraulic system as claimed in claim 4 is characterized in that:
Described retraction oil return circuit comprises the first Pilot operated check valve (22A) and back pressure valve (23), the entry end of described the first Pilot operated check valve (22A) is connected with described rodless cavity, and the outlet end of described the first Pilot operated check valve (22A) links to each other with fuel tank (1) by described back pressure valve (23);
Described retraction oil-feed oil circuit comprises the second Pilot operated check valve (22B), and the entry end of described the second Pilot operated check valve (22B) is connected with described rod chamber, and the outlet end of described the second Pilot operated check valve (22B) is connected with described main oil return circuit (002);
Described hinged hydraulic system also comprises oil circuit control (003), and the control port of described the first Pilot operated check valve (22A) and described the second Pilot operated check valve (22B) is connected in described oil circuit control (003).
6. hinged hydraulic system as claimed in claim 5, it is characterized in that: the entry end of described oil circuit control (003) is connected with described main oil-feed oil circuit (001) or described main oil return circuit (002) by the first selector valve (21).
7. hinged hydraulic system as claimed in claim 1, it is characterized in that: described hinged hydraulic system also comprises safety circuit, described safety circuit comprises the 3rd one-way valve (13A), the 4th one-way valve (13B) and the first relief valve (14), the entry end of described the 3rd one-way valve (13A) is connected with described rodless cavity, the entry end of described the 4th one-way valve (13B) is connected with described rod chamber, links to each other with described the first relief valve (14) after the outlet end of described the 3rd one-way valve (13A) and described the 4th one-way valve (13B) links to each other.
8. such as each described hinged hydraulic system of claim 1 to 7, it is characterized in that: described hinged hydraulic system also comprises supercharging oil sources and Pressure Increasing Oil-Line, one end of described Pressure Increasing Oil-Line links to each other with described rodless cavity, and the other end of described Pressure Increasing Oil-Line links to each other with the supercharging oil sources.
9. hinged hydraulic system as claimed in claim 8, it is characterized in that: described Pressure Increasing Oil-Line comprises the 5th one-way valve (20) and second switch valve (17), the outlet end of described the 5th one-way valve (20) is connected with described rodless cavity, and the entry end of described the 5th one-way valve (20) links to each other with described supercharging oil sources by described second switch valve (17).
10. hinged hydraulic system as claimed in claim 8, it is characterized in that: the pressure oil of described supercharging oil sources comes from described main oil-feed oil circuit (001).
11. hinged hydraulic system as claimed in claim 10 is characterized in that:
Described hinged hydraulic system comprises the pressure controlled valve group that is arranged on the described main oil-feed oil circuit (001);
Described pressure controlled valve group comprises the second relief valve (7), the second selector valve (6) and the 3rd relief valve (8) that links to each other with described the second relief valve (7) by described the second selector valve (6);
The filler opening of described the second relief valve (7) is connected with described main oil-feed oil circuit (001), the oil outlet of described the second relief valve (7) and described the 3rd relief valve (8) all leads to fuel tank (1), described the second selector valve (6) has three kinds of working staties, under the first working state, the filler opening of described the 3rd relief valve (8) and oil outlet all lead to fuel tank (1), under the second working state, the spring side hydraulic fluid port of described the second relief valve (7), the filler opening of described the 3rd relief valve (8) and oil outlet all lead to fuel tank (1), under the third working state, the spring side hydraulic fluid port of described the second relief valve (7) is connected with the filler opening of described the 3rd relief valve (8).
12. such as each described hinged hydraulic system of claim 1 to 7, it is characterized in that:
Described hinged hydraulic system also comprises bleed-off circuit;
Described bleed-off circuit comprises stop valve (9) and the one-way speed-regulating valve (10) that is connected in successively between described main oil-feed oil circuit (001) and the fuel tank (1).
13. a shield machine is characterized in that: described shield machine is provided with each described hinged hydraulic system of claim 1 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220297699 CN202707689U (en) | 2012-06-25 | 2012-06-25 | Hinged hydraulic system and shield tunneling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220297699 CN202707689U (en) | 2012-06-25 | 2012-06-25 | Hinged hydraulic system and shield tunneling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202707689U true CN202707689U (en) | 2013-01-30 |
Family
ID=47587996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220297699 Expired - Fee Related CN202707689U (en) | 2012-06-25 | 2012-06-25 | Hinged hydraulic system and shield tunneling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202707689U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108661963A (en) * | 2018-08-15 | 2018-10-16 | 中铁工程装备集团有限公司 | A kind of globular hinge hydraulic system for small curve turning shield machine |
| CN110410374A (en) * | 2019-08-16 | 2019-11-05 | 中铁工程装备集团有限公司 | A kind of Thrust System of Shield Tunneling Machines supercharging device and its working method |
| CN111894938A (en) * | 2020-08-04 | 2020-11-06 | 中国铁建重工集团股份有限公司 | Active hinged hydraulic control system of heading machine and heading machine |
-
2012
- 2012-06-25 CN CN 201220297699 patent/CN202707689U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108661963A (en) * | 2018-08-15 | 2018-10-16 | 中铁工程装备集团有限公司 | A kind of globular hinge hydraulic system for small curve turning shield machine |
| CN108661963B (en) * | 2018-08-15 | 2024-02-02 | 中铁工程装备集团有限公司 | Spherical hinged hydraulic system for small-curve turning shield machine |
| CN110410374A (en) * | 2019-08-16 | 2019-11-05 | 中铁工程装备集团有限公司 | A kind of Thrust System of Shield Tunneling Machines supercharging device and its working method |
| CN110410374B (en) * | 2019-08-16 | 2024-06-28 | 中铁工程装备集团有限公司 | Pressurizing device of shield tunneling machine propulsion system and working method thereof |
| CN111894938A (en) * | 2020-08-04 | 2020-11-06 | 中国铁建重工集团股份有限公司 | Active hinged hydraulic control system of heading machine and heading machine |
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