CN114857104A - Shield constructs machine and thrust cylinder supports hydraulic system thereof - Google Patents
Shield constructs machine and thrust cylinder supports hydraulic system thereof Download PDFInfo
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- CN114857104A CN114857104A CN202210498756.8A CN202210498756A CN114857104A CN 114857104 A CN114857104 A CN 114857104A CN 202210498756 A CN202210498756 A CN 202210498756A CN 114857104 A CN114857104 A CN 114857104A
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- 230000005641 tunneling Effects 0.000 claims abstract description 24
- 239000003921 oil Substances 0.000 claims description 323
- 239000010720 hydraulic oil Substances 0.000 claims description 25
- 230000009471 action Effects 0.000 description 8
- 238000009412 basement excavation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000009467 reduction Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0621—Shield advancing devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a shield tunneling machine and a thrust cylinder supporting hydraulic system thereof, belonging to the technical field of hydraulic control and comprising a hydraulic pump, an oil tank and a pressure reducing valve, wherein an oil inlet of the hydraulic pump is connected with the oil tank, an oil inlet of the pressure reducing valve is connected with an oil outlet of the hydraulic pump, an oil outlet of the pressure reducing valve is respectively connected with a rodless cavity of each support cylinder, and the pressure reducing valve is used for adjusting the pressure of oil flowing to the rodless cavity of each support cylinder. By applying the shield tunneling machine and the propulsion oil cylinder supporting hydraulic system thereof provided by the invention, under a propulsion mode and a segment assembling mode, the adjustment of the oil supply pressure of the rodless cavity is realized through the pressure reducing valve, the low-pressure mode of the support oil cylinder extends out in the propulsion mode, and the high-pressure mode of the support oil cylinder extends out in the segment assembling mode. In addition, a first overflow valve can be connected between a third oil port of the second reversing valve and the oil tank, and the first overflow valve can prevent the support oil cylinder from being pressed back by the push oil cylinder when the engine is stopped.
Description
Technical Field
The invention relates to the technical field of hydraulic control, in particular to a shield tunneling machine and a thrust cylinder support hydraulic system thereof.
Background
The shield machine construction method is more and more widely applied to tunnel engineering construction in the fields of urban rail transit, railways, highways, municipal basic equipment and the like because of safety and high efficiency. The thrust cylinder is a key component of the shield machine, and the thrust, the attitude adjustment and the segment installation of the whole shield machine are all carried out by the thrust cylinder or are realized by the cooperation of the thrust cylinder.
In order to ensure that the axis of the thrust cylinder is parallel to the shield axis and coincides with the central line of the side edge of the duct piece, a protection device can be arranged aiming at the thrust cylinder, if a plurality of supporting cylinders are adopted to push the thrust cylinder, the thrust cylinder is protected from lateral force, and the purpose of avoiding damage is achieved.
The shield machine has different requirements on the supporting oil cylinder in different working modes, but the conventional supporting oil cylinder cannot meet the requirements in the conventional arrangement mode.
In summary, how to effectively solve the problem that the control of the support oil cylinder is difficult to satisfy different working modes of the shield tunneling machine is a problem to be solved by the technical personnel in the field at present.
Disclosure of Invention
In view of this, the present invention provides a shield tunneling machine and a thrust cylinder support hydraulic system thereof, and the shield tunneling machine and the thrust cylinder support hydraulic system thereof are structurally designed to effectively solve the problem that the control of the support cylinder is difficult to satisfy different working modes of the shield tunneling machine.
In order to achieve the purpose, the invention provides the following technical scheme:
the supporting hydraulic system of the thrust oil cylinder of the shield tunneling machine is used for controlling the supporting oil cylinder for supporting the thrust oil cylinder and comprises a hydraulic pump, an oil tank and a pressure reducing valve, wherein an oil inlet of the hydraulic pump is connected with the oil tank, an oil inlet of the pressure reducing valve is connected with an oil outlet of the hydraulic pump, an oil outlet of the pressure reducing valve is respectively connected with a rodless cavity of each supporting oil cylinder, and the pressure reducing valve is used for adjusting the oil pressure flowing to the rodless cavity of each supporting oil cylinder.
Optionally, the hydraulic system supported by the propulsion cylinder further comprises a first reversing valve, the pressure reducing valve comprises a first pressure reducing valve and a second pressure reducing valve, an oil inlet of the first reducing valve and an oil inlet of the second reducing valve are respectively connected with an oil outlet of the hydraulic pump, a first working oil port of the first reversing valve is connected with an oil outlet of the second reducing valve, a second working oil port of the first reversing valve is connected with a rodless cavity of each supporting oil cylinder, the third working oil port of the first reversing valve is connected with the oil outlet of the first reducing valve, when the first reversing valve is arranged at the first position, the second working oil port of the first reversing valve is communicated with the third working oil port, when the first reversing valve is arranged at the second position, and a second working oil port of the first reversing valve is communicated with a first working oil port, and the pressure of an oil outlet of the first reducing valve is smaller than that of the oil outlet of the second reducing valve.
Optionally, the hydraulic system supported by the propulsion oil cylinder further comprises a second reversing valve, a first working oil port of the second reversing valve is connected with a second working oil port of the first reversing valve, a second working oil port of the second reversing valve is connected with the rodless cavity of each supporting oil cylinder, a third working oil port of the second reversing valve is connected with the oil tank, when the second reversing valve is placed in the first position, the second working oil port of the second reversing valve is communicated with the third working oil port, and when the second reversing valve is placed in the second position, the second working oil port of the second reversing valve is communicated with the first working oil port.
Optionally, in the hydraulic system supported by the propulsion cylinder, a first overflow valve is connected between a third oil port of the second directional valve and the oil tank, and the first overflow valve is used for preventing the propulsion cylinder from pressing back the support cylinder when the engine is stopped.
Optionally, the hydraulic system supported by the propulsion cylinder further includes electromagnetic ball valves and first check valves, which are arranged in one-to-one correspondence with the rodless cavities of the support cylinders, two ends of each electromagnetic ball valve are respectively connected to the second working oil port of the second reversing valve and the corresponding rodless cavity of the support cylinder, and two ends of each first check valve are respectively connected to two ends of the corresponding electromagnetic ball valve, so as to control hydraulic oil to flow from the rodless cavity of the support cylinder to the second working oil port of the second reversing valve.
Optionally, in the above propulsion cylinder supporting hydraulic system, a second check valve is connected between an oil outlet of the hydraulic pump and the pressure reducing valve, and the second check valve is configured to control hydraulic oil to flow from the hydraulic pump to the pressure reducing valve only.
Optionally, in the above propulsion cylinder supporting hydraulic system, a second overflow valve is connected between an oil outlet of the hydraulic pump and the oil tank.
Optionally, in the hydraulic system supported by the propulsion cylinder, the pressure reducing valve is a proportional pressure reducing valve, and the pressure of an oil outlet of the proportional pressure reducing valve is adjustable.
Optionally, the hydraulic system supported by the propulsion oil cylinder further comprises a reversing valve, a first working oil port of the reversing valve is connected with an oil outlet of the proportional pressure reducing valve, a second working oil port of the reversing valve is connected with a rodless cavity of each support oil cylinder, a third working oil port of the reversing valve is connected with the oil tank, when the second reversing valve is arranged at a first position, a second working oil port of the second reversing valve is communicated with the third working oil port, and when the second reversing valve is arranged at a second position, a second working oil port of the second reversing valve is communicated with the first working oil port.
The invention provides a hydraulic system for supporting a propulsion oil cylinder. An oil inlet of the hydraulic pump is connected with the oil tank, and an oil outlet of the hydraulic pump is connected with an oil inlet of the pressure reducing valve; the oil outlets of the pressure reducing valves are respectively connected with the rodless cavities of the supporting oil cylinders, and the pressure reducing valves are used for adjusting the pressure of oil flowing to the rodless cavities of the supporting oil cylinders.
By applying the propelling oil cylinder supporting hydraulic system provided by the invention, hydraulic oil in the oil tank enters the rodless cavity of the supporting oil cylinder through the hydraulic pump and the pressure reducing valve. Under the shield machine propulsion mode, in the normal excavation process of the shield machine, the direction of the propulsion oil cylinder needs to be adjusted, so the propulsion oil cylinder needs low-pressure support, and the support oil cylinder can float along with the deflection of the propulsion oil cylinder at the moment, thereby achieving the purpose of protecting the propulsion oil cylinder. Under the segment assembling mode, the shield tunneling machine does not perform excavation operation, and the propulsion oil cylinder needs to be fixed in the segment assembling process, so that the propulsion oil cylinder needs to be supported at high pressure, and the support oil cylinder presses the propulsion oil cylinder in the circumferential direction under the high-pressure mode, so that the purpose of protecting the propulsion oil cylinder is achieved. Therefore, under the propulsion mode and the segment assembling mode, the adjustment of the oil supply pressure of the rodless cavity is realized through the pressure reducing valve, so that the support oil cylinder extends out in the low-pressure mode under the propulsion mode and extends out in the high-pressure mode under the segment assembling mode. In conclusion, the thrust oil cylinder is adopted to support the hydraulic system, so that the support oil cylinder can act in different modes of the shield machine, and different pressures required by the support oil cylinder in different modes of the shield machine can be met.
In a preferred embodiment, the propulsion cylinder support hydraulic system comprises a first directional valve and the pressure relief valve comprises a first pressure relief valve and a second pressure relief valve. In the pushing mode, the first reversing valve is arranged at the first position, the second working oil port of the first reversing valve is communicated with the third working oil port of the first reversing valve, and then hydraulic oil in the oil tank enters the rodless cavity of the supporting oil cylinder through the hydraulic pump, the first pressure reducing valve and a passage from the third working oil port of the first reversing valve to the second working oil port, and the supporting oil cylinder stretches out in the low-pressure mode.
And under the segment assembling mode, the first reversing valve is arranged at the second position, the second working oil port of the first reversing valve is communicated with the first working oil port of the first reversing valve, so that hydraulic oil in the oil tank enters the rodless cavity of the supporting oil cylinder through the hydraulic pump, the second pressure reducing valve and a passage from the first working oil port of the first reversing valve to the second working oil port, and the supporting oil cylinder stretches out in the high-pressure mode. In conclusion, the thrust oil cylinder is adopted to support the hydraulic system, and the first reversing valve is matched with the first pressure reducing valve and the second pressure reducing valve with different pressures to switch the pressures, so that the support oil cylinder acts in different modes of the shield tunneling machine, and different pressures required by the support oil cylinder in different modes of the shield tunneling machine are met.
In another embodiment, the pressure reducing valve is a proportional pressure reducing valve, and the outlet pressure of the proportional pressure reducing valve is adjustable. In a shield tunneling machine propulsion mode or a segment assembling mode, hydraulic oil in the oil tank enters a rodless cavity of the support oil cylinder through the hydraulic pump and the proportional pressure reducing valve, and pressure adjustment of the rodless cavity of the support oil cylinder can be achieved by adjusting pressure of an oil outlet of the proportional pressure reducing valve, so that actions of the support oil cylinder in different modes of the shield tunneling machine are achieved.
In order to achieve the aim, the invention also provides a shield machine which comprises any one of the thrust cylinder support hydraulic systems. Because the thrust cylinder supporting hydraulic system has the technical effects, the shield machine with the thrust cylinder supporting hydraulic system also has corresponding technical effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a thrust cylinder support hydraulic system of a shield tunneling machine according to an embodiment of the present invention.
The drawings are numbered as follows:
the hydraulic control system comprises a motor 1, a coupler 2, a hydraulic pump 3, a second overflow valve 4, a second one-way valve 5, a first overflow valve 6, a first pressure reducing valve 7, a second pressure reducing valve 8, a first reversing valve 9, a second reversing valve 10, an electromagnetic ball valve 11, a first one-way valve 12, a supporting oil cylinder 13 and an oil tank 14.
Detailed Description
The embodiment of the invention discloses a shield machine and a thrust cylinder supporting hydraulic system thereof, which are used for realizing the actions of a supporting cylinder in different modes of the shield machine.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a hydraulic system for supporting a propulsion oil cylinder. An oil inlet of the hydraulic pump is connected with the oil tank, and an oil outlet of the hydraulic pump is connected with an oil inlet of the pressure reducing valve; the oil outlets of the pressure reducing valves are respectively connected with the rodless cavities of the supporting oil cylinders, and the pressure reducing valves are used for adjusting the pressure of oil flowing to the rodless cavities of the supporting oil cylinders. The hydraulic pump is used for providing an oil source for a hydraulic system of the support cylinder, and the pressure reducing valve is used for adjusting the pressure of the hydraulic system.
By applying the propelling oil cylinder supporting hydraulic system provided by the invention, hydraulic oil in the oil tank enters the rodless cavity of the supporting oil cylinder through the hydraulic pump and the pressure reducing valve. Under the shield machine propulsion mode, in the normal excavation process of the shield machine, the direction of the propulsion oil cylinder needs to be adjusted, so the propulsion oil cylinder needs low-pressure support, and the support oil cylinder can float along with the deflection of the propulsion oil cylinder at the moment, thereby achieving the purpose of protecting the propulsion oil cylinder. In the segment assembling mode, the shield tunneling machine does not perform excavation operation, the propulsion oil cylinder needs to be fixed in the segment assembling process, so that the propulsion oil cylinder needs to be supported at high pressure, and the support oil cylinder presses the propulsion oil cylinder in the circumferential direction in the high-pressure mode, so that the purpose of protecting the propulsion oil cylinder is achieved. Therefore, under the propulsion mode and the segment assembling mode, the adjustment of the oil supply pressure of the rodless cavity is realized through the pressure reducing valve, so that the support oil cylinder extends out in the low-pressure mode under the propulsion mode and extends out in the high-pressure mode under the segment assembling mode. In conclusion, the thrust oil cylinder is adopted to support the hydraulic system, so that the support oil cylinder can act in different modes of the shield machine, and different pressures required by the support oil cylinder in different modes of the shield machine are met.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a thrust cylinder support hydraulic system of a shield tunneling machine according to an embodiment of the present invention.
In one embodiment, the present invention provides a propulsion cylinder support hydraulic system including a hydraulic pump 3, a tank 14, a first pressure reducing valve 7, a second pressure reducing valve 8, and a first directional valve 9.
An oil inlet of the hydraulic pump 3 is connected with the oil tank 14, and an oil outlet of the hydraulic pump 3 is respectively connected with an oil inlet of the first reducing valve 7 and an oil inlet of the second reducing valve 8. The hydraulic pump 3 is used for providing an oil source for a hydraulic system of the support cylinder 13, and the hydraulic pump 3 is particularly connected with the motor 1, such as connected with the motor 1 through a coupling 2. The motor 1 provides power for the hydraulic pump 3, and the coupling 2 transmits the power of the motor 1 to the hydraulic pump 3, so as to drive the hydraulic pump 3 to work.
The first pressure reducing valve 7 and the second pressure reducing valve 8 are respectively used for adjusting the pressure of the hydraulic system, the oil outlet pressure of the first pressure reducing valve 7 is smaller than that of the second pressure reducing valve 8, namely the first pressure reducing valve 7 corresponds to a low-pressure mode, and the second pressure reducing valve 8 corresponds to a high-pressure mode. The oil liquid is pumped by the hydraulic pump 3 to flow into an oil inlet of the first reducing valve 7 or an oil inlet of the second reducing valve 8, and flows out of an oil outlet of the first reducing valve 7 or an oil outlet of the second reducing valve 8 after being subjected to pressure reduction action of the first reducing valve 7 or the second reducing valve 8.
A first working oil port of the first reversing valve 9 is connected with an oil outlet of the second reducing valve 8, a second working oil port of the first reversing valve 9 is connected with a rodless cavity of each supporting oil cylinder 13, and a third working oil port of the first reversing valve 9 is connected with an oil outlet of the first reducing valve 7. When the first reversing valve 9 is arranged at the first position, the second working oil port of the first reversing valve 9 is communicated with the third working oil port of the first reversing valve 9, so that the oil is pumped by the hydraulic pump 3 to flow into the oil inlet of the first pressure reducing valve 7, flows out of the oil outlet of the first pressure reducing valve 7 after the pressure reduction action of the first pressure reducing valve 7, and flows into the rodless cavity of the support oil cylinder 13 through a passage between the third working oil port and the second working oil port of the first reversing valve 9.
When the first reversing valve 9 is arranged at the second position, the second working oil port of the first reversing valve 9 is communicated with the first working oil port of the first reversing valve 9, so that the oil is pumped by the hydraulic pump 3 to flow into the oil inlet of the second reducing valve 8, flows out of the oil outlet of the second reducing valve 8 after being subjected to the pressure reduction action of the second reducing valve 8, and flows into the rodless cavity of the support oil cylinder 13 through a passage between the first working oil port and the second working oil port of the first reversing valve 9.
By applying the thrust cylinder support hydraulic system provided by the invention, in a thrust mode of the shield tunneling machine, the thrust cylinder needs low-pressure support because the thrust cylinder needs to adjust the direction in the normal excavation process of the shield tunneling machine, and the support cylinder 13 can float along with the deflection of the thrust cylinder, so that the aim of protecting the thrust cylinder is fulfilled. In the mode, the first reversing valve 9 is arranged at the first position, the second working oil port of the first reversing valve 9 is communicated with the third working oil port of the first reversing valve 9, so that hydraulic oil in the oil tank 14 enters the rodless cavity of the support oil cylinder 13 from the second working oil port to the second working oil port channel through the hydraulic pump 3, the first reducing valve 7 and the third working oil port of the first reversing valve 9, and the support oil cylinder 13 extends in the low-pressure mode. In the segment assembling mode, the shield tunneling machine does not perform excavation operation, and in the segment assembling process, the propulsion oil cylinder needs to be fixed, so that the propulsion oil cylinder needs to be supported at high pressure, and the support oil cylinder 13 presses the propulsion oil cylinder in the circumferential direction in the high-pressure mode, so that the purpose of protecting the propulsion oil cylinder is achieved. In this mode, the first directional valve 9 is disposed at the second position, the second working oil port of the first directional valve 9 is communicated with the first working oil port of the first directional valve 9, so that the hydraulic oil in the oil tank 14 enters the rodless cavity of the support oil cylinder 13 through the hydraulic pump 3, the second pressure reducing valve 8, and the passage from the first working oil port of the first directional valve 9 to the second working oil port, and the support oil cylinder 13 extends in the high-pressure mode. In summary, the thrust cylinder support hydraulic system is adopted, and the first reversing valve 9 is matched with the first pressure reducing valve 7 and the second pressure reducing valve 8 with different pressures to perform pressure switching, so that the action of the support cylinder 13 in different modes of the shield tunneling machine is realized, and different pressures required by the support cylinder 13 in different modes of the shield tunneling machine are met.
In one embodiment, the hydraulic control system further comprises a second reversing valve 10, wherein a first working oil port of the second reversing valve 10 is connected with a second working oil port of the first reversing valve 9, a second working oil port of the second reversing valve 10 is connected with a rodless cavity of each support cylinder 13, and a third working oil port of the second reversing valve 10 is connected with an oil tank 14. When the second direction valve 10 is placed at the first position, the second working oil port of the second direction valve 10 is communicated with the third working oil port of the second direction valve 10, and the rodless cavity of each support cylinder 13 is connected with the oil tank 14. When the second reversing valve 10 is arranged at the second position, the second working oil port of the second reversing valve 10 is communicated with the first working oil port of the second reversing valve 10, and then the rodless cavity of the support oil cylinder 13 passes through the first reversing valve 9 and then is connected with the hydraulic pump 3 through the first pressure reducing valve 7 or the second pressure reducing valve 8. I.e. by means of the second direction valve 10, to switch whether or not the support cylinder 13 is supplied with oil. The second reversing valve 10 is placed in the second position in the thrust mode and the segment make-up mode, and the second reversing valve 10 is placed in the first position in the shutdown mode.
In one embodiment, a first overflow valve 6 is connected between the third port of the second direction valve 10 and the oil tank 14. The first overflow valve 6 is used for preventing the support oil cylinder 13 from being pressed back by the propulsion oil cylinder when the engine is stopped, and the support oil cylinder 13 is protected. When the engine is stopped, the second directional control valve 10 is set to the first position, and the hydraulic oil in the rodless cavity of each support cylinder 13 is led to the first overflow valve 6 through the passage from the second port to the third port of the second directional control valve 10 and then passes through the first overflow valve 6 to provide a certain back pressure.
In one embodiment, the hydraulic control system further comprises electromagnetic ball valves 11 and first check valves 12 which are arranged in one-to-one correspondence to the rodless cavities of the support cylinders 13, two ends of each electromagnetic ball valve 11 are respectively connected with the second working oil port of the second reversing valve 10 and the corresponding rodless cavity of the support cylinder 13, and two ends of each first check valve 12 are respectively connected with two ends of the corresponding electromagnetic ball valve 11, so as to control hydraulic oil to flow from the rodless cavity of the support cylinder 13 to the second working oil port of the second reversing valve 10. Specifically, a first end of each electromagnetic ball valve 11 is connected to a second working oil port of the second reversing valve 10, a second end of each electromagnetic ball valve 11 is connected to a rodless cavity of each support cylinder 13, a first end of each first check valve 12 is connected to a first end of the corresponding electromagnetic ball valve 11, a second end of each first check valve 12 is connected to a second end of the corresponding electromagnetic ball valve 11, and the first check valve 12 is used for controlling hydraulic oil to flow from the second end to the first end. The first check valve 12 is used for draining the oil of the support oil cylinder 13 to the first overflow valve 6 when the engine is stopped. The electromagnetic ball valve 11 is used for controlling whether the support oil cylinder 13 is in effect. Therefore, when the engine is stopped, the electromagnetic ball valves 11 are closed, the second reversing valve 10 is arranged at the first position, and the hydraulic oil in the rodless cavity of each support oil cylinder 13 is led to the first overflow valve 6 through the channel from the second oil port to the third oil port of the second reversing valve 10 under the drainage action of the first check valve 12, and then passes through the first overflow valve 6 to provide a certain back pressure.
In one embodiment, a second check valve is connected between the oil outlet of the hydraulic pump 3 and the pressure reducing valve, and in the case that the pressure reducing valve includes a first pressure reducing valve 7 and a second pressure reducing valve 8, a second check valve 5 is connected between the oil outlet of the hydraulic pump 3 and the first pressure reducing valve 7 and the second pressure reducing valve 8, and the second check valve 5 is used for controlling hydraulic oil to flow from the hydraulic pump 3 to the first pressure reducing valve 7 or the second pressure reducing valve 8 only. Specifically, the oil outlet of the hydraulic pump 3 and the first pressure reducing valve 7 are connected with a second check valve 5, and a second pressure reducing valve 8 is also located between the oil outlet of the hydraulic pump 3 and the second pressure reducing valve 8. The second check valve 5 is used for preventing hydraulic oil from flowing back to the hydraulic pump 3. In the propulsion mode, the hydraulic oil in the oil tank 14 flows to the first pressure reducing valve 7 or the second pressure reducing valve 8 through the hydraulic pump 3, the second check valve 5. Two second check valves 5 may also be provided, connected between the oil outlet of the hydraulic pump 3 and the first and second pressure reducing valves 7 and 8, respectively, as required.
In one embodiment, a second overflow valve 4 is connected between the oil outlet of the hydraulic pump 3 and the oil tank 14. The second overflow valve 4 is used for limiting the system pressure, and when the system pressure is higher than the preset pressure, the second overflow valve 4 is started, and the hydraulic oil flows back to the oil tank 14 through the second overflow valve 4.
The first direction valve 9 and the second direction valve 10 may be electromagnetic direction valves for automatic control. In one embodiment, the first direction valve 9, the second direction valve 10 and the electromagnetic ball valve 11 are in the normal state as shown in fig. 1. In the push mode, the first direction valve 9 is not powered, the second direction valve 10 is powered, and the electromagnetic ball valve 11 is powered. Hydraulic oil in the oil tank 14 enters a rodless cavity of the support oil cylinder 13 through a passage from a third working oil port to a second working oil port of the hydraulic pump 3, the second check valve 5, the first pressure reducing valve 7 and the first reversing valve 9, a passage from the first working oil port to the second working oil port of the second reversing valve 10 and the electromagnetic ball valve 11, and the support oil cylinder 13 extends in a low-pressure mode. In the segment assembling mode, the first reversing valve 9 is electrified, the second reversing valve 10 is electrified, and the electromagnetic ball valve 11 is electrified. Hydraulic oil in the oil tank 14 enters a rodless cavity of the support oil cylinder 13 through the hydraulic pump 3, the second check valve 5, the second pressure reducing valve 8, a passage from the first working oil port to the second working oil port of the first reversing valve 9, a passage from the first working oil port to the second working oil port of the second reversing valve 10 and the electromagnetic ball valve 11, and the support oil cylinder 13 extends in a high-pressure mode. In the shutdown mode, the electromagnetic ball valve 11 is not powered and the second direction valve 10 is not powered. The first overflow valve 6 protects the support cylinder 13. At this time, the first direction valve 9, the second direction valve 10 and the electromagnetic ball valve 11 are not powered. The hydraulic oil in the rodless cavity of the support oil cylinder 13 passes through the first check valve 12 and a channel from the second working oil port of the second reversing valve 10 to the first working oil port and is led to the first overflow valve 6.
The invention also provides a hydraulic system for supporting the propulsion oil cylinder, which comprises a hydraulic pump 3, an oil tank 14 and a proportional pressure reducing valve. An oil inlet of the hydraulic pump 3 is connected with the oil tank 14, an oil inlet of the proportional pressure reducing valve is connected with an oil outlet of the hydraulic pump 3, an oil outlet of the proportional pressure reducing valve is respectively connected with the rodless cavities of the support oil cylinders 13, and the pressure of the oil outlet of the proportional pressure reducing valve is adjustable.
This embodiment differs from the above-described embodiment in that a proportional pressure reducer is used instead of the first pressure reducing valve 7 and the second pressure reducing valve 8 in the above-described embodiment, and accordingly, the provision of the first direction changing valve 9 is not required. The switching between the low-pressure mode and the high-pressure mode can be realized by adjusting the pressure of an oil outlet of the proportional pressure reducing valve. The proportional pressure reducing valve may be controlled by an external PLC to adjust its pressure reduction value. The arrangement of other elements in this embodiment can refer to the arrangement related to the above embodiments, and is not described herein again.
By applying the thrust cylinder support hydraulic system provided by the invention, under a thrust mode or a segment assembling mode of a shield machine, hydraulic oil in the oil tank 14 enters the rodless cavity of the support cylinder 13 through the hydraulic pump 3 and the proportional pressure reducing valve, and the pressure adjustment of the rodless cavity of the support cylinder 13 can be realized by adjusting the pressure of the oil outlet of the proportional pressure reducing valve, so that the actions of the support cylinder 13 under different modes of the shield machine are realized.
In one embodiment, the hydraulic control system further comprises a reversing valve, wherein a first working oil port of the reversing valve is connected with an oil outlet of the proportional pressure reducing valve, a second working oil port of the reversing valve is connected with a rodless cavity of each support oil cylinder 13, a third working oil port of the reversing valve is connected with an oil tank 14, when the second reversing valve 10 is placed in a first position, the second working oil port of the second reversing valve 10 is communicated with the third working oil port, and when the second reversing valve 10 is placed in a second position, the second working oil port of the second reversing valve 10 is communicated with the first working oil port. The change-over valve may in particular correspond to the second change-over valve in the embodiment shown in fig. 1 described above.
In one embodiment, a first overflow valve 6 is connected between the third oil port of the reversing valve and the oil tank 14.
In one embodiment, the hydraulic control system further comprises electromagnetic ball valves 11 and first check valves 12 which are arranged in one-to-one correspondence to the rodless cavities of the support cylinders 13, two ends of each electromagnetic ball valve 11 are respectively connected with the second working oil port of the second reversing valve 10 and the corresponding rodless cavity of the support cylinder 13, and two ends of each first check valve 12 are respectively connected with two ends of the corresponding electromagnetic ball valve 11, so as to control hydraulic oil to flow from the rodless cavity of the support cylinder 13 to the second working oil port of the second reversing valve 10.
In one embodiment, a second check valve 5 is connected between the oil outlet of the hydraulic pump 3 and the proportional pressure reducing valve, and the second check valve 5 is used for controlling hydraulic oil to flow to the proportional pressure reducing valve from the hydraulic pump 3 only.
In one embodiment, a second overflow valve 4 is connected between the oil outlet of the hydraulic pump 3 and the oil tank 14.
Based on the thrust cylinder supporting hydraulic system provided in the above embodiment, the invention also provides a shield tunneling machine, which comprises any one of the thrust cylinder supporting hydraulic systems provided in the above embodiments. Because the shield machine adopts the thrust cylinder support hydraulic system in the embodiment, please refer to the embodiment for the beneficial effects of the shield machine.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The supporting hydraulic system of the thrust oil cylinder of the shield tunneling machine is used for controlling the supporting oil cylinder for supporting the thrust oil cylinder and is characterized by comprising a hydraulic pump, an oil tank and a pressure reducing valve, wherein an oil inlet of the hydraulic pump is connected with the oil tank, an oil inlet of the pressure reducing valve is connected with an oil outlet of the hydraulic pump, an oil outlet of the pressure reducing valve is respectively connected with a rodless cavity of each supporting oil cylinder, and the pressure reducing valve is used for adjusting the oil pressure flowing to the rodless cavity of each supporting oil cylinder.
2. The propulsion cylinder supporting hydraulic system according to claim 1, further comprising a first directional valve, wherein the pressure reducing valve includes a first pressure reducing valve and a second pressure reducing valve, an oil inlet of the first pressure reducing valve and an oil inlet of the second pressure reducing valve are respectively connected to an oil outlet of the hydraulic pump, a first working oil port of the first directional valve is connected to an oil outlet of the second pressure reducing valve, a second working oil port of the first directional valve is connected to the rodless chamber of each of the supporting cylinders, a third working oil port of the first directional valve is connected to an oil outlet of the first pressure reducing valve, when the first directional valve is placed at a first position, the second working oil port of the first directional valve is communicated with the third working oil port, when the first directional valve is placed at a second position, the second working oil port of the first directional valve is communicated with the first working oil port, the oil outlet pressure of the first reducing valve is smaller than that of the second reducing valve.
3. The hydraulic system for supporting the propulsion cylinders according to claim 2, further comprising a second directional valve, wherein a first working oil port of the second directional valve is connected with a second working oil port of the first directional valve, a second working oil port of the second directional valve is connected with the rodless cavity of each supporting cylinder, a third working oil port of the second directional valve is connected with the oil tank, when the second directional valve is placed at a first position, the second working oil port of the second directional valve is communicated with the third working oil port, and when the second directional valve is placed at a second position, the second working oil port of the second directional valve is communicated with the first working oil port.
4. The hydraulic system for supporting a propulsion cylinder as claimed in claim 3, wherein a first overflow valve is connected between the third oil port of the second directional valve and the oil tank, and the first overflow valve is used for preventing the propulsion cylinder from pressing the support cylinder back when the engine is stopped.
5. The propulsion cylinder supporting hydraulic system according to claim 4, further comprising electromagnetic ball valves and first check valves, the electromagnetic ball valves and the first check valves are arranged in one-to-one correspondence with the rodless cavities of the supporting cylinders, two ends of each electromagnetic ball valve are respectively connected with the second working oil port of the second reversing valve and the corresponding rodless cavity of the supporting cylinder, and two ends of each first check valve are respectively connected with two ends of the corresponding electromagnetic ball valves, so that hydraulic oil can only flow from the rodless cavities of the supporting cylinders to the second working oil port of the second reversing valve.
6. The propulsion cylinder supporting hydraulic system according to any one of claims 1 to 5, characterized in that a second check valve is connected between an oil outlet of the hydraulic pump and the pressure reducing valve, the second check valve being configured to control hydraulic oil to flow only from the hydraulic pump to the pressure reducing valve.
7. The propulsion cylinder supported hydraulic system of any one of claims 1 to 5, wherein a second overflow valve is connected between an oil outlet of the hydraulic pump and the oil tank.
8. The ram support hydraulic system of claim 1, wherein the pressure relief valve is a proportional pressure relief valve and an outlet pressure of the proportional pressure relief valve is adjustable.
9. The hydraulic system for supporting the propulsion cylinder according to claim 8, further comprising a reversing valve, wherein a first working oil port of the reversing valve is connected to an oil outlet of the proportional pressure reducing valve, a second working oil port of the reversing valve is connected to a rodless cavity of each supporting cylinder, a third working oil port of the reversing valve is connected to the oil tank, when the second reversing valve is placed in a first position, a second working oil port of the second reversing valve is communicated with the third working oil port, and when the second reversing valve is placed in a second position, a second working oil port of the second reversing valve is communicated with the first working oil port.
10. A shield tunneling machine comprising the thrust cylinder support hydraulic system according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210498756.8A CN114857104A (en) | 2022-05-09 | 2022-05-09 | Shield constructs machine and thrust cylinder supports hydraulic system thereof |
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| CN202210498756.8A CN114857104A (en) | 2022-05-09 | 2022-05-09 | Shield constructs machine and thrust cylinder supports hydraulic system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115972664A (en) * | 2022-12-19 | 2023-04-18 | 山东泰丰智能控制股份有限公司 | Angle modulation device control system |
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- 2022-05-09 CN CN202210498756.8A patent/CN114857104A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115972664A (en) * | 2022-12-19 | 2023-04-18 | 山东泰丰智能控制股份有限公司 | Angle modulation device control system |
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