CN110701119A - Partitioned control shield tunneling machine propelling hydraulic system - Google Patents
Partitioned control shield tunneling machine propelling hydraulic system Download PDFInfo
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- CN110701119A CN110701119A CN201910889990.1A CN201910889990A CN110701119A CN 110701119 A CN110701119 A CN 110701119A CN 201910889990 A CN201910889990 A CN 201910889990A CN 110701119 A CN110701119 A CN 110701119A
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- 230000005641 tunneling Effects 0.000 title claims description 28
- 230000001105 regulatory effect Effects 0.000 claims description 51
- 238000005192 partition Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 187
- 238000010521 absorption reaction Methods 0.000 description 7
- 239000010720 hydraulic oil Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 239000010729 system oil Substances 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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
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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
- 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
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
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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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/855—Testing of fluid pressure systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Chemical & Material Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic system, which aims to solve the problems that the control configuration of a hydraulic system is too complex and the pressure maintaining performance of a hydraulic control one-way valve is unstable when a thrust oil cylinder of a shield machine in the prior art works, and provides a partitioned control shield machine thrust hydraulic system, which comprises an oil tank, an oil pump, a control valve group, an oil cylinder, a hydraulic source and at least one partitioned control loop, wherein the partitioned control loop comprises a proportional pressure reducing valve, a pressure sensor and a two-stage pressure maintaining loop, and the two-stage pressure maintaining loop comprises a first one-way valve, a second one-way valve, a first electromagnetic valve, a logic valve and a hydraulic control one-way valve; the proportional pressure reducing valve, the logic valve and the hydraulic control one-way valve are sequentially connected to an oil path between the port A of the control valve group and the rodless cavity of the oil cylinder.
Description
Technical Field
The invention relates to the field of shield machines, in particular to a partitioned control shield machine propelling hydraulic system.
Background
The shield machine is a large-scale engineering mechanical device used for underground tunnel tunneling construction, wherein the shield machine propelling hydraulic system is used for tunneling and segment splicing of a tunnel. At present, a hydraulic system of a shield machine is provided with a proportional pressure reducing valve for each thrust cylinder to carry out pressure regulation, but in actual construction, the thrust pressure of the cylinders is generally controlled according to the arrangement area of the thrust cylinders. This design configuration is too complex and the system manufacturing cost is too high. In addition, the pressure maintaining mode of the existing propulsion oil cylinder adopts a hydraulic control one-way valve for pressure maintaining, and the design has extremely high requirement on the reliability of the hydraulic control one-way valve. Once the pilot operated check valve fails, the system will have no remedial action.
Disclosure of Invention
Aiming at the problems, the invention provides a shield machine propelling hydraulic system with a zone control function, and mainly solves the problems that the control configuration of a hydraulic system is too complex and the pressure maintaining performance of a hydraulic control one-way valve is unstable when a shield machine propelling oil cylinder works in the prior art. The invention adopts the configuration of the hydraulic system simplified by the subarea pressure control loop, so that the system control is simpler. The two-stage pressure maintaining loop is adopted to greatly improve the pressure maintaining reliability of the system, the three-stage pressure regulating valve group is adopted to enable the system to meet the pressure requirements of different working conditions, the service efficiency of the system is improved, the energy consumption of the system is reduced, the two-stage pressure regulating loop is adopted, the reversing impact of a propulsion hydraulic system can be effectively avoided when the propulsion oil cylinder retracts, the stability of the system is improved, and the service life of components is prolonged.
The invention provides a partitioned control shield tunneling machine propelling hydraulic system, which comprises an oil tank, an oil pump, a control valve group, an oil cylinder and a hydraulic source, wherein the oil pump is connected with the oil tank; the oil tank is connected with an oil inlet of the oil pump, an oil outlet of the oil pump is connected with a port P of the control valve group, a port A of the control valve group is connected with a rodless cavity of the oil cylinder, a rod cavity of the oil cylinder is connected with a port B of the control valve group, a port T of the control valve group is connected with the oil tank, an oil path between the port A and the port T of the control valve group is provided with a two-stage pressure regulating loop, and an oil path between the oil outlet of the oil pump and the port T of the control valve group is;
the propulsion oil cylinder is divided into a plurality of subareas according to requirements, and at least one propulsion oil cylinder in each subarea is provided with a stroke sensor. Each subarea is provided with a proportional pressure reducing valve which is connected with the rodless cavities of all the propelling cylinders of the subarea and is used for controlling the propelling pressure of the subarea propelling cylinder. The system comprises at least one zone control loop, wherein the zone control loop comprises a proportional pressure reducing valve, a pressure sensor and two-stage pressure maintaining loops, the zone control loop is formed by connecting the proportional pressure reducing valve and the two-stage pressure maintaining loops in series, the two-stage pressure maintaining loops of each propulsion oil cylinder are the same, and the two-stage pressure maintaining loops of the propulsion oil cylinders in the same zone are mutually connected in parallel. Meanwhile, each group of the propulsion oil cylinders at least comprises one propulsion oil cylinder, and can also be an oil cylinder group formed by connecting two or more propulsion oil cylinders in parallel.
The two-stage pressure maintaining loop comprises a first one-way valve, a second one-way valve, a first electromagnetic valve, a logic valve and a hydraulic control one-way valve;
the oil circuit between the port A of the control valve group and the rodless cavity of the oil cylinder is sequentially connected with the proportional pressure reducing valve, the logic valve and the hydraulic control one-way valve; the oil outlet of the proportional pressure reducing valve is connected with the oil port end of the pressure sensor, the electrical end of the pressure sensor 17 is connected with the controller, an oil path between the oil inlet of the logic valve and the pilot port is sequentially connected with a first one-way valve and a first electromagnetic valve in series, the oil outlet of the logic valve and the oil inlet of the first electromagnetic valve are connected with a second one-way valve in series, the hydraulic control end of the hydraulic control one-way valve is connected with a hydraulic source, and the oil drainage ports of the hydraulic control one-way valve, the proportional pressure reducing valve and.
The three-stage pressure regulating loop comprises a first pilot type overflow valve, a second solenoid valve, a third solenoid valve and a first overflow valve, the first pilot type overflow valve is connected between an oil outlet of the oil pump and a T port of the control valve group in series, the second solenoid valve is connected between a pilot port of the first pilot type overflow valve and the oil outlet in series, and the third solenoid valve and the first overflow valve are sequentially connected between the pilot port of the first pilot type overflow valve and the oil outlet in series.
Further, the two-stage pressure regulating loop comprises a second pilot-operated overflow valve, a fourth electromagnetic valve and a second overflow valve, the second pilot-operated overflow valve is connected in series between the port A and the port T of the control valve group, a pilot port of the second pilot-operated overflow valve is connected with a first working oil port of the fourth electromagnetic valve, a second working oil port of the fourth electromagnetic valve is connected with an oil outlet of the second pilot-operated overflow valve, a third working oil port of the fourth electromagnetic valve is connected with an oil inlet of the second overflow valve, and an oil outlet of the overflow valve is connected with an oil outlet of the second pilot-operated overflow valve.
Furthermore, the number of the two-stage pressure maintaining loops is at least more than one, and the number of the two-stage pressure maintaining loops is equal to that of the oil cylinders.
Furthermore, a fifth electromagnetic valve is connected in series on an oil way connecting a hydraulic control end of the hydraulic control one-way valve and a hydraulic source.
Furthermore, the controller is a PLC controller, and the control valve group is an electro-hydraulic reversing valve.
Furthermore, the power input end of the oil pump is connected with the output end of the motor, an oil path between an oil inlet of the oil pump and the oil tank is connected with the oil absorption filter in series, a third check valve and a filter are sequentially connected on the oil path between an oil outlet of the oil pump and a P port of the control valve group in series, a loop between a T port of the control valve group and the oil tank is sequentially connected with a cooler and an oil return filter in series, a third overflow valve is connected between a B port of the control valve group and the T port in series.
The invention has the beneficial effects that:
1. the two-stage pressure maintaining design is adopted, so that the pressure maintaining reliability of the system is greatly improved. A rodless cavity of each group of the propulsion oil cylinders is provided with a two-stage pressure maintaining loop in which a hydraulic control one-way valve and a logic valve are connected in series, so that the propulsion oil cylinders are locked and maintained in one direction, and the propulsion oil cylinders are prevented from retracting accidentally under the pressure maintaining state.
2. The two-stage pressure maintaining loop has a double locking pressure maintaining function on the propulsion oil cylinder, and when the hydraulic control one-way valve fails accidentally, the logic valve can replace the hydraulic control one-way valve to continue to maintain pressure for the propulsion oil cylinder, so that the pressure maintaining performance of the hydraulic system is improved.
3. The three-level pressure regulating valve group is adopted, so that the system can meet the pressure requirements of different working conditions, the service efficiency of the system is improved, and the energy consumption of the system is reduced. A three-stage pressure regulating loop is adopted in an oil inlet pipeline of the propulsion system, and when the three-stage pressure regulating loop is switched into a high-pressure loop, the pressure of the system is in a high-pressure state at the moment, so that the requirement of the maximum pressure in the tunneling process can be met. When the thrust cylinder is assembled and the duct piece extends out, the three-stage pressure regulating loop is switched to a low-pressure loop, so that the condition that the duct piece is damaged or the assembling quality of the duct piece is influenced due to overhigh pressure when the thrust cylinder is used for tightly pushing the duct piece is ensured.
4. By adopting the two-stage pressure regulating loop, the reversing impact of the propulsion hydraulic system can be effectively avoided when the propulsion oil cylinder retracts, the stability of the system is improved, and the service life of components is prolonged. The two-stage pressure regulating loop is switched to a high pressure loop to carry out pressure limiting protection on the rod cavity of the propulsion oil cylinder in the propulsion process, and when the propulsion oil cylinder retracts, the two-stage pressure regulating loop is switched to a low pressure loop to unload the propulsion oil cylinder before reversing, so that the impact phenomenon is avoided when the propulsion oil cylinder reverses and retracts.
5. And a third overflow valve is connected to a port B of the control valve group to perform pressure limiting protection on a rod cavity of the propulsion oil cylinder.
6. The adoption of the zone pressure control loop simplifies the system configuration, simplifies the system control, and realizes the independent control of the extension of the propulsion oil cylinder.
Drawings
FIG. 1 is a schematic view of a partitioned arrangement of a propulsion cylinder according to the present invention;
FIG. 2 is a hydraulic schematic diagram of a partitioned control shield tunneling machine propulsion hydraulic system of the present invention;
FIG. 3 is a partition control loop diagram of the present invention;
FIG. 4 is a three stage voltage regulation loop of the present invention;
fig. 5 is a diagram of a two-stage voltage regulation loop of the present invention.
Wherein: 1-oil absorption filter, 2-oil pump, 3-third check valve, 4-filter, 5-first pilot overflow valve, 6-second electromagnetic valve, 7-third electromagnetic valve, 8-first overflow valve, 9-cooler, 10-oil return filter, 11-third overflow valve, 12-control valve group, 13-second pilot overflow valve, 14-fourth electromagnetic valve, 15-second overflow valve, 16-proportional pressure reducing valve, 17-pressure sensor, 18-first check valve, 19-first electromagnetic valve, 20-hydraulic control check valve, 21-second check valve, 22-logic valve, 23-fifth electromagnetic valve, 24-hydraulic source, 25-oil tank and 26-oil pump motor.
Detailed Description
In order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, so to speak, as communicating between the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
According to the embodiment shown in fig. 1-5, the shield tunneling machine propelling hydraulic system with the partition control is provided. In principle the invention can be applied to a propulsion system with any number of propulsion cylinders, but in order to more specifically illustrate the connection and the functioning of the propulsion hydraulic system, a propulsion hydraulic system with 16 propulsion cylinders is described in detail below. Fig. 1 is one of the partition arrangement modes for applying 16 thrust oil cylinders, where three oil cylinders S16, S1, and S2 installed at the top of the shield tunneling machine are first partitions (upper partitions), four oil cylinders S3, S4, S5, and S6 installed at the right side of the shield tunneling machine are second partitions (right partitions), five oil cylinders S7, S8, S9, S10, and S11 installed at the bottom of the shield tunneling machine are third partitions (lower partitions), four oil cylinders S12, S13, S14, and S15 installed at the left side of the shield tunneling machine are fourth partitions (left partitions), and where the oil cylinders S1, S5, S9, and S13 are oil cylinders with stroke sensors.
As shown in fig. 2, the propulsion hydraulic system is connected in the following way: an oil inlet of an oil pump 2 is connected with an oil absorption filter 1, the oil absorption filter 1 is installed in an oil tank 25, an oil outlet of the oil pump 2 is connected with an oil inlet of a third check valve 3, an oil outlet of the third check valve 3 is connected with an oil inlet of a filter 4 and a P port of a third-stage pressure regulating loop, a T port of the third-stage pressure regulating loop is connected with an oil inlet of a cooler 9, an oil outlet of the cooler 9 is connected with an oil inlet of an oil return filter 10, an oil return port of the oil return filter 10 is connected with the oil tank, an oil outlet of the filter 4 is connected with the P port of a control valve group 12, a T port of the control valve group 12 is connected with an oil inlet of the cooler 9, an A port of the control valve group 12 is connected with an A port of each zone control loop, an S port of each zone control loop is connected with a rodless cavity of a propulsion oil cylinder, a Y port of each zone control, a second working oil port of the fifth electromagnetic valve 23 is directly connected with an oil tank, a port P of the two-stage pressure regulating loop is connected with a port a of the control valve group 12, a port T of the two-stage pressure regulating loop is connected with a port T of the control valve group 12, a port B of the control valve group 12 is connected with rod cavities of all the thrust cylinders, an oil inlet of the third overflow valve 11 is connected with a port B of the control valve group 12, and an oil outlet of the third overflow valve 11 is connected with a port T of the control valve group 12.
As shown in fig. 4, the specific connections of the three-stage voltage regulation loop are as follows: an oil inlet of the first pilot overflow valve 5 is a P port of a three-level pressure regulating loop, an oil outlet of the first pilot overflow valve 5 is a T port of the three-level pressure regulating loop, a first working oil port of the second electromagnetic valve 6 is connected with a pilot port of the first pilot overflow valve 5, a second working oil port of the second electromagnetic valve 6 is connected with an oil outlet of the first pilot overflow valve 5, a first working oil port of the third electromagnetic valve 7 is connected with a pilot port of the first pilot overflow valve 5, a second working oil port of the third electromagnetic valve 7 is connected with an oil inlet of the first overflow valve 8, and an oil outlet of the first overflow valve 8 is connected with an oil outlet of the first pilot overflow valve 5.
As shown in fig. 3, the partitioned control loop is composed of a partitioned proportional pressure reducing valve and a cylinder two-stage pressure maintaining loop connected in series, the two-stage pressure maintaining loops of each propulsion cylinder are the same, and the two-stage pressure maintaining loops of the propulsion cylinder in the same partition are connected in parallel, taking the first partitioned control loop as an example, the composition form is as follows: the primary pressure side of the proportional pressure reducing valve 16 is used as a partition control loop A port, the secondary pressure side of the proportional pressure reducing valve 16 is connected with the first working oil port of the two-stage pressure maintaining loop of each propulsion oil cylinder, the oil drainage port of the proportional pressure reducing valve 16 is used as a partition control loop Y port, the oil port end of the pressure sensor 17 is connected with the secondary pressure side of the proportional pressure reducing valve, the electrical end of the pressure sensor 17 is connected with a PLC (programmable logic controller), the second working oil port of the two-stage pressure maintaining loop is used as a partition control loop S port, the two-stage pressure maintaining loop control oil ports are mutually connected to be used as a partition control loop X port, the first oil drainage port of the two-stage pressure maintaining loop is connected.
The two-stage pressure maintaining loop comprises the following components: the first working oil port of the logic valve 22 is a first working oil port of a two-stage pressure maintaining loop, the oil inlet of the first check valve 18 is connected with the first working oil port of the logic valve 22, the oil outlet of the first check valve 18 is connected with the first working oil port of the first electromagnetic valve 19, the third working oil port of the first electromagnetic valve 19 is connected with the pilot port of the logic valve 22, the second working oil port of the first electromagnetic valve 19 is used as a first oil drainage port of the two-stage pressure regulating loop, the second working oil port of the logic valve 22 is connected with the first working oil port of the pilot operated check valve 20, the second working oil port of the pilot operated check valve 20 is a second working oil port of the two-stage pressure maintaining loop, the control oil port of the pilot operated check valve 20 is a control oil port of the two-stage pressure maintaining loop, the oil drainage port of the pilot operated check valve 20 is a second oil drainage port of the two-stage pressure maintaining loop, the oil.
As shown in fig. 5, the two-stage voltage regulation loop is formed as follows: an oil inlet of the second pilot-operated overflow valve 13 is a P port of the two-stage pressure regulating loop, an oil outlet of the second pilot-operated overflow valve 13 is a T port of the two-stage pressure regulating loop, a pilot oil port of the second pilot-operated overflow valve 13 is connected with a first working oil port of a fourth electromagnetic valve 14, a second working oil port of the fourth electromagnetic valve 14 is connected with an oil outlet of the second pilot-operated overflow valve 13, a third working oil port of the fourth electromagnetic valve 14 is connected with an oil inlet of the second overflow valve 15, and an oil outlet of the second overflow valve 15 is connected with an oil outlet of the second pilot-operated overflow valve 13.
The invention has different implementation modes in the tunneling and assembling processes of the shield tunneling machine, the following description is divided into a tunneling mode and an assembling mode, and the first partition propulsion oil cylinder S16 is taken as an example for specific description.
TABLE 1 Propulsion System control Table
Wherein: DTI controls the third solenoid valve 7, DT2 controls the second solenoid valve 6, DT3, DT4 controls the control valve group 12, DT5 controls the fourth solenoid valve 14, DT6 controls the fifth solenoid valve 23, SP controls the proportional pressure reducing valve 16, SJ controls the first solenoid valve 19.
And (3) tunneling mode: starting an oil pump motor 26, selecting a propulsion oil cylinder S16 to extend, electrifying three-stage pressure regulating loop electromagnets DT2 and DT1, electrifying a three-stage pressure regulating loop electromagnet P1, electrifying a two-stage pressure regulating loop electromagnet DT5, electrifying a two-stage pressure regulating loop electromagnet P4, electrifying an electromagnet DT3, electrifying a proportional electromagnet SP1, electrifying an electromagnet SJ16, electrifying a third overflow valve 11, and electrifying hydraulic oil from an oil tank through an oil absorption filter 1, the oil pump 2, a third one-way valve 3, a filter 4, a control valve group 12, a proportional pressure reducing valve 16, a logic valve 22 and a hydraulic control one-way valve 20 to enter a rodless cavity of the propulsion oil cylinder S16 to push a piston rod of the propulsion oil cylinder S16 to extend outwards, and meanwhile, leading hydraulic oil of a rod cavity of the propulsion oil cylinder S.
In the tunneling mode, the thrust of the propulsion cylinder can be adjusted in real time through the proportional pressure reducing valve 16, and meanwhile, the thrust value of the feedback propulsion cylinder can be monitored in real time through the pressure sensor 17.
An assembling mode: starting an oil pump motor 26, selecting a propulsion oil cylinder S16 to extend, electrifying a three-level pressure regulating loop electromagnet DT2, electrifying a three-level pressure regulating loop, setting pressure of the three-level pressure regulating loop to be P2, electrifying a two-level pressure regulating loop electromagnet DT5, setting pressure of the two-level pressure regulating loop to be P4, electrifying an electromagnet DT3, electrifying a proportional electromagnet SP1, electrifying an electromagnet SJ16, setting pressure of a third overflow valve 11 to be P3, allowing hydraulic oil to enter a rodless cavity of the propulsion oil cylinder S16 from an oil tank through an oil absorption filter 1, a hydraulic control oil pump 2, a third one-way valve 3, a filter 4, a control valve group 12, a proportional pressure reducing valve 16, a logic valve 22 and a one-way valve 20 to push a piston rod of the propulsion oil cylinder S16 to extend outwards, and allowing a rod cavity of the.
When the propulsion oil cylinder S16 is selected to be contracted, firstly the electromagnet DT6 is electrified, the two-stage pressure regulating loop DT5 is electrified for a period of time, the pressure of the two-stage pressure regulating loop is set to be P5, then the two-stage pressure regulating loop DT5 is de-energized, the pressure set by the two-stage pressure regulating loop is P4, then the electromagnets DT1 and DT2 of the three-stage pressure regulating loop are energized, the pressure set by the three-stage pressure regulating loop is P1, the electromagnet DT4 is energized, the proportional electromagnet SP1 is energized, the electromagnet SJ16 is energized, the pressure set by the third overflow valve 11 is P3, at this time, the hydraulic oil enters the propulsion oil cylinder S16 from the oil tank through the oil absorption filter 1, the oil pump 2, the third one-way valve 3, the filter 4 and the control valve group 12, the piston rod cavity of the propulsion oil cylinder S16 is pushed to retract inwards, meanwhile, the hydraulic oil in the rodless cavity of the propulsion oil cylinder S16 returns to the oil tank through the hydraulic control one-way valve 20, the logic valve 22, the proportional pressure reducing valve 16, the control valve group 12, the cooler 9 and the oil return filter 10.
Adopt tertiary pressure regulating circuit at propulsion system oil inlet pipeline, before the hydro-cylinder action after propulsion system starts, tertiary pressure regulating circuit is in the off-load return circuit, the hydraulic oil of oil pump 2 output passes through tertiary pressure regulating circuit and directly returns the oil tank this moment, when propulsion cylinder is at the tunnelling in-process and when assembling the process hydro-cylinder and retract, tertiary pressure regulating circuit switches into high-pressure return circuit, system pressure is in the high-pressure state this moment and can satisfy tunnelling in-process maximum pressure required, when propulsion cylinder is assembling the section of jurisdiction and stretching out, tertiary pressure regulating circuit switches into the low pressure return circuit, guaranteed that propulsion cylinder can not damage the section of jurisdiction or influence the section of jurisdiction and assemble the quality because of the pressure is too high. The two-stage pressure regulating loop is switched to a high pressure loop to carry out pressure limiting protection on the rod cavity of the propulsion oil cylinder in the propulsion process, and when the propulsion oil cylinder retracts, the two-stage pressure regulating loop is switched to a low pressure loop to unload the propulsion oil cylinder before reversing, so that the impact phenomenon is avoided when the propulsion oil cylinder reverses and retracts. And an overflow valve is connected to a port B of the control valve group to perform pressure limiting protection on a rod cavity of the propulsion oil cylinder.
The above-described embodiments are merely illustrative of the embodiments of the present invention, and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and all of them should fall into the protection scope of the present invention.
Claims (8)
1. A partition-controlled shield tunneling machine propelling hydraulic system comprises an oil tank, an oil pump, a control valve group, an oil cylinder and a hydraulic source, and is characterized in that the oil cylinder is divided into at least one partition, at least one oil cylinder with a stroke sensor is configured in each partition, a proportional pressure reducing valve connected with a rodless cavity of the oil cylinder is configured in each partition, and the proportional pressure reducing valve is used for controlling propelling pressure of the oil cylinder in each partition; a rodless cavity oil way of the oil cylinder is provided with a two-stage pressure maintaining loop, and the two-stage pressure maintaining loop is used for carrying out one-way locking and pressure maintaining on the oil cylinder and preventing the oil cylinder from accidentally retracting in a pressure maintaining state; an oil inlet pipeline of the propulsion hydraulic system is provided with a three-stage pressure regulating loop, and the three-stage pressure regulating loop is used for meeting the maximum pressure in the tunneling process of the shield tunneling machine and the splicing of segments of the shield tunneling machine; the oil cylinder rodless cavity main oil supply loop is provided with a two-stage pressure regulating loop, and the two-stage pressure regulating loop is used for pressure limiting protection of a rod cavity of the oil cylinder, so that the phenomenon of reversing impact of the oil cylinder is avoided.
2. The thrust hydraulic system of the zone control shield tunneling machine according to claim 1, wherein the oil tank is connected with an oil inlet of an oil pump, an oil outlet of the oil pump is connected with a port P of a control valve group, a port A of the control valve group is connected with a rodless cavity of an oil cylinder, a rod cavity of the oil cylinder is connected with a port B of the control valve group, a port T of the control valve group is connected with the oil tank, an oil path between the port A and the port T of the control valve group is provided with a two-stage pressure regulating loop, and an oil path between the oil outlet of the oil pump and the port T of the control valve group is provided with a three-stage pressure regulating;
the hydraulic control system is characterized by further comprising at least one zone control loop, wherein the zone control loop comprises a proportional pressure reducing valve, a pressure sensor and a two-stage pressure maintaining loop, and the two-stage pressure maintaining loop comprises a first one-way valve (18), a second one-way valve (21), a first electromagnetic valve (19), a logic valve and a hydraulic control one-way valve;
the oil circuit between the port A of the control valve group and the rodless cavity of the oil cylinder is sequentially connected with the proportional pressure reducing valve, the logic valve and the hydraulic control one-way valve; the oil outlet of the proportional pressure reducing valve is connected with the oil port end of the pressure sensor, the electrical end of the pressure sensor is connected with the controller, an oil path between the oil inlet of the logic valve and the pilot port is sequentially connected with a first one-way valve (18) and a first electromagnetic valve (19) in series, the oil outlet of the logic valve and the oil inlet of the first electromagnetic valve (19) are connected with a second one-way valve (21) in series, the hydraulic control end of the hydraulic control one-way valve (20) is connected with a hydraulic source, and the oil drainage ports of the hydraulic control one-way valve, the proportional pressure reducing valve and the first electromagnetic valve (19.
3. The partitioned control shield tunneling machine propelling hydraulic system according to claim 1, wherein the three-stage pressure regulating loop comprises a first pilot overflow valve (5), a second solenoid valve (6), a third solenoid valve (7) and a first overflow valve (8), the first pilot overflow valve (5) is connected in series between an oil outlet of the oil pump and a T port of the control valve group, the second solenoid valve (6) is connected in series between a pilot port and an oil outlet of the first pilot overflow valve (5), and the third solenoid valve (7) and the first overflow valve (8) are sequentially connected in series between the pilot port and the oil outlet of the first pilot overflow valve (5).
4. The zone-control shield tunneling machine propelling hydraulic system according to claim 1, wherein the two-stage pressure regulating loop comprises a second pilot-operated overflow valve (13), a fourth electromagnetic valve (14) and a second overflow valve (15), the second pilot-operated overflow valve (13) is connected in series between an A port and a T port of the control valve group, a pilot port of the second pilot-operated overflow valve (13) is connected with a first working oil port of the fourth electromagnetic valve (14), a second working oil port of the fourth electromagnetic valve (14) is connected with an oil outlet of the second pilot-operated overflow valve (13), a third working oil port of the fourth electromagnetic valve (14) is connected with an oil inlet of the second overflow valve (15), and an oil outlet of the overflow valve is connected with an oil outlet of the second pilot-operated overflow valve (13).
5. The propelling hydraulic system of a zone control shield tunneling machine according to claim 1, wherein the number of the two-stage pressure maintaining circuits is at least one, and the number of the two-stage pressure maintaining circuits is equal to the number of the oil cylinders.
6. The thrust hydraulic system of the zone-controlled shield tunneling machine according to claim 1, wherein a fifth electromagnetic valve (23) is connected in series on an oil path connecting a hydraulic control end of the hydraulic control check valve and a hydraulic source.
7. The thrust hydraulic system of a zone-controlled shield tunneling machine according to claim 1, wherein the controller is a PLC controller, and the control valve set is an electro-hydraulic directional valve.
8. The thrust hydraulic system of the zone-controlled shield tunneling machine according to any one of claims 1-7, wherein a power input end of the oil pump is connected with an output end of a motor, an oil path between an oil inlet of the oil pump and an oil tank is connected with an oil suction filter (1) in series, an oil path between an oil outlet of the oil pump and a port P of the control valve group is connected with a third check valve (3) and a filter (4) in series in sequence, a loop between a port T of the control valve group and the oil tank is connected with a cooler (9) and an oil return filter (10) in sequence, and a third overflow valve (11) is connected between a port B and a port.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910889990.1A CN110701119A (en) | 2019-09-20 | 2019-09-20 | Partitioned control shield tunneling machine propelling hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910889990.1A CN110701119A (en) | 2019-09-20 | 2019-09-20 | Partitioned control shield tunneling machine propelling hydraulic system |
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| CN201910889990.1A Withdrawn CN110701119A (en) | 2019-09-20 | 2019-09-20 | Partitioned control shield tunneling machine propelling hydraulic system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550465A (en) * | 2020-05-15 | 2020-08-18 | 北京林克富华技术开发有限公司 | Control valve group |
| CN112814692A (en) * | 2021-01-19 | 2021-05-18 | 中铁工程装备集团有限公司 | Shield machine and posture deviation rectifying system thereof |
| CN112943733A (en) * | 2021-03-23 | 2021-06-11 | 中铁工程装备集团有限公司 | Heading machine propulsion system and control method thereof |
-
2019
- 2019-09-20 CN CN201910889990.1A patent/CN110701119A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550465A (en) * | 2020-05-15 | 2020-08-18 | 北京林克富华技术开发有限公司 | Control valve group |
| CN112814692A (en) * | 2021-01-19 | 2021-05-18 | 中铁工程装备集团有限公司 | Shield machine and posture deviation rectifying system thereof |
| CN112943733A (en) * | 2021-03-23 | 2021-06-11 | 中铁工程装备集团有限公司 | Heading machine propulsion system and control method thereof |
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