CN112761648A - Shield that possesses self-checking and safe redundancy impels hydraulic system - Google Patents
Shield that possesses self-checking and safe redundancy impels hydraulic system Download PDFInfo
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- CN112761648A CN112761648A CN202110032922.0A CN202110032922A CN112761648A CN 112761648 A CN112761648 A CN 112761648A CN 202110032922 A CN202110032922 A CN 202110032922A CN 112761648 A CN112761648 A CN 112761648A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/003—Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
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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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- 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
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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
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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
Abstract
The invention discloses a shield propelling hydraulic system with self-detection and safety redundancy, which comprises at least one set of tunneling system and a detection system connected with the tunneling system, wherein the tunneling system comprises two single-rod hydraulic cylinders, the two single-rod hydraulic cylinders are respectively provided with a displacement sensor, two oil cavities of the two single-rod hydraulic cylinders are respectively provided with a pressure sensor, and the oil cavities of the two single-rod hydraulic cylinders are connected with a hydraulic oil source through a tunneling one-way valve group and are connected with the detection system through a reversing valve group. The shield propelling device has the advantages that on the premise of realizing the shield propelling function, the shield propelling device has the functions of online detection of leakage in the hydraulic cylinder, online detection of friction force of the hydraulic cylinder and maintaining the propelling force under the condition that a propelling oil source system fails.
Description
Technical Field
The invention relates to a hydraulic system for a shield propulsion system, in particular to a shield propulsion hydraulic system with self-detection and safety redundancy.
Background
The shield tunneling machine is a large-scale complex device integrating a cutter head system, a propulsion system, a duct piece assembling system and a screw conveyor system, and is widely applied to the fields of urban rail transit construction, underground space development, railway tunnel construction, hydraulic engineering construction and the like. In order to ensure the stability of the front rock soil, the propelling force of the propelling system needs to be kept balanced with the water and soil pressure of the front soil body, and excavation and tunneling under support are realized. Due to the fact that the working condition environment is severe, the propulsion hydraulic cylinder and the propulsion oil source system are prone to failure, and huge challenges are brought to tunnel construction. The hydraulic system of the existing shield tunneling machine does not realize integrated self-detection and safety redundancy, and causes great trouble to troubleshooting and construction safety.
Disclosure of Invention
In order to overcome the problems, the invention integrates self-detection and safety redundancy, and the output is safe and stable. The technical proposal is that the method comprises the following steps,
the utility model provides a shield that possesses self-checking and safe redundancy advances hydraulic system, includes one set at least tunnelling system and the detecting system who is connected with it, tunnelling system includes two single pole pneumatic cylinders, two the single pole pneumatic cylinder that goes out all is equipped with displacement sensor, two oil pockets of single pole pneumatic cylinder all are equipped with pressure sensor, two the oil pocket of single pole pneumatic cylinder is connected with hydraulic oil source and detecting system through tunnelling check valve group, switching-over valves.
Furthermore, the detection system comprises a variable frequency motor and a constant delivery pump connected with the variable frequency motor, the constant delivery pump is respectively connected with a pressure reducing valve and a first pressure sensor through a high-pressure oil filter and a detection one-way valve, the first pressure sensor is connected with the variable frequency motor through a pressure controller, the pressure controller is respectively connected with the pressure reducing valve and a second pressure sensor, the pressure reducing valve is connected with the second pressure sensor and then connected with two single-rod hydraulic cylinders through a reversing valve group, and an energy accumulator is arranged between the first pressure sensor and the detection one-way valve.
Further, the tunneling check valve group comprises a first hydraulic control check valve, a second hydraulic control check valve, a third hydraulic control check valve and a fourth hydraulic control check valve; the reversing valve group comprises a first reversing valve, a second reversing valve, a third reversing valve, a fourth reversing valve, a fifth reversing valve, a sixth reversing valve, a seventh reversing valve, an eighth reversing valve and a ninth reversing valve.
Furthermore, two oil cavities of one single-rod hydraulic cylinder are respectively connected with a first hydraulic control one-way valve, a first reversing valve, a second hydraulic control one-way valve and a second reversing valve; two oil cavities of the other single-rod hydraulic cylinder are respectively connected with a third hydraulic control one-way valve, a third reversing valve, a fourth hydraulic control one-way valve and a fourth reversing valve; the first hydraulic control one-way valve is connected with the detection system through a seventh reversing valve, the second hydraulic control one-way valve is connected with the detection system through a sixth reversing valve, the third hydraulic control one-way valve is connected with the detection system through an eighth reversing valve, and the fourth hydraulic control one-way valve is connected with the detection system through a ninth reversing valve.
Furthermore, the first hydraulic control one-way valve is connected with the third hydraulic control one-way valve and is connected with an A port of a fifth reversing valve, the A port of the fifth reversing valve is connected with an oil tank through a first safety valve, the second hydraulic control one-way valve is connected with the fourth hydraulic control one-way valve and is connected with a B port of the fifth reversing valve, a C port of the fifth reversing valve is connected with a hydraulic oil source, a D port of the fifth reversing valve is connected with the oil tank, and a proportional speed regulating valve and a proportional overflow valve are arranged between the oil tank and the hydraulic oil source.
Further, the detection process of whether the tunneling system generates internal leakage is as follows:
s1, hydraulic rods of two single-rod hydraulic cylinders are in an extending motion state, a first reversing valve, a third reversing valve, a second reversing valve and a fourth reversing valve are in a right position, a first hydraulic control one-way valve, a second hydraulic control one-way valve, a third hydraulic control one-way valve and a fourth hydraulic control one-way valve are in a left position, and a fifth reversing valve is in a right position; pressure oil flowing out of the hydraulic oil source flows into rodless cavities of the two single-rod hydraulic cylinders through a fifth reversing valve, the first hydraulic control one-way valve and the third hydraulic control one-way valve, and the two single-rod hydraulic cylinders stretch out under the action of the pressure oil;
s2, when the hydraulic rod of the single-rod hydraulic cylinder is located at the maximum extending position, the fifth reversing valve is switched to be located at the middle position, the first hydraulic control one-way valve and the third hydraulic control one-way valve are closed, the first reversing valve and the third reversing valve are opened, pressure oil output by the detection system flows into the two single-rod hydraulic cylinders through the first reversing valve and the third reversing valve, when the hydraulic oil pressure in the rodless cavities of the two single-rod hydraulic cylinders reaches a preset value, the first reversing valve and the third reversing valve are closed, and the internal leakage amount of the two single-rod hydraulic rods can be calculated respectively through curves of the hydraulic oil pressure, recorded by pressure sensors connected with rod cavities of the two single-rod hydraulic cylinders, changing along with time.
Further, the two single-rod hydraulic cylinders are respectively a first single-rod hydraulic cylinder and a second single-rod hydraulic cylinder, and taking the detection of the starting friction force in the retraction direction of the hydraulic rod of the first single-rod hydraulic cylinder as an example, the specific process is that the hydraulic rod of the first single-rod hydraulic cylinder is in a completely extended state, the first reversing valve and the sixth reversing valve are located at the right position, the second reversing valve and the seventh reversing valve are located at the left position, and the fifth reversing valve is located at the middle position; the pressure of the hydraulic oil output by the proportional pressure reducing valve is gradually increased from zero by adjusting the proportional pressure reducing valve, the hydraulic oil output by the proportional pressure reducing valve flows into a rod cavity of the first single-rod hydraulic cylinder and a sixth pressure sensor connected with the rod cavity of the first single-rod hydraulic cylinder after passing through the second reversing valve respectively, the hydraulic oil flows into the first hydraulic control one-way valve after passing through the seventh reversing valve, the first hydraulic control one-way valve is in a conducting state, the hydraulic oil in the other oil cavity of the first single-rod hydraulic cylinder flows into an oil tank through the first hydraulic control one-way valve and the fifth reversing valve, and when the first single-rod hydraulic cylinder starts to start, the starting friction force of the first single-rod hydraulic cylinder in the retraction direction of the hydraulic rod can be detected according to the pressure sensor connected with the rod cavity of the first.
Furthermore, when the hydraulic oil source is powered off accidentally and the hydraulic oil source cannot continuously provide pressure oil, the fifth reversing valve is in a middle position; the first reversing valve, the sixth reversing valve, the third reversing valve and the ninth reversing valve are switched to a left position; the second reversing valve, the fourth reversing valve, the seventh reversing valve and the eighth reversing valve are switched to the right position; and hydraulic oil output by the proportional pressure reducing valve flows into the two single-rod hydraulic cylinders through the third reversing valve and the first reversing valve respectively, and hydraulic rods of the two single-rod hydraulic cylinders are kept in a stable state under the action of pressure oil in the rodless cavity.
Advantageous effects
1. The system is provided with a set of low-power oil source system and an accumulator group, can provide a high-pressure oil source for detection of a propulsion hydraulic system, and can be used as an emergency oil source under the condition that a propulsion main system fails.
2. The system is provided with a set of control oil circuit to realize the switching application of the main oil source and the auxiliary oil source.
3. The system realizes the functions of online detection of leakage in the shield propulsion hydraulic cylinder, online detection of hydraulic cylinder starting friction force and propulsion force maintenance under the condition of failure of a propulsion oil source system.
Drawings
FIG. 1 is a schematic diagram of the present application;
FIG. 2 is an original drawing of a first set of tunneling systems;
FIG. 3 is a schematic diagram of a detection system;
1-a third reversing valve; 2-a first displacement sensor, 3-a second reversing valve, 4-a first reversing valve and 5-a first single-rod hydraulic cylinder; 6-a fourth reversing valve, 7-a fifth pressure sensor, 8-a sixth pressure sensor, 9-a second displacement sensor, 10-a seventh reversing valve, 11-a first pilot-controlled check valve, 12-a second single-rod hydraulic cylinder, 13-a second pilot-controlled check valve, 14-a sixth reversing valve, 15-an eighth reversing valve, 16-a third pilot-controlled check valve, 17-a third pressure sensor, 18-a fourth pressure sensor, 19-a fourth pilot-controlled check valve, 20-a ninth reversing valve, 21-a first safety valve, 22-a fifth reversing valve, 23-a proportional overflow valve, 24-a proportional speed regulating valve, 25-a hydraulic oil source, 26-an oil tank, 27-a second pressure sensor, 28-a proportional pressure reducing valve, 29-a first pressure sensor, 30-detection one-way valve, 31-accumulator, 32-second safety valve, 33-high pressure oil filter, 34-one-way constant delivery pump, 35-low pressure oil filter, 36-variable frequency motor and 37-pressure controller.
Detailed Description
The following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application.
The utility model provides a shield that possesses self-checking and safe redundancy advances hydraulic system, includes one set at least driving system and the detecting system who is connected with it, driving system includes two single play pole pneumatic cylinders (first single play pole pneumatic cylinder 5 and second single play pole pneumatic cylinder 12), two single play pole pneumatic cylinder all is equipped with displacement sensor, two oil pockets of single play pole pneumatic cylinder all are equipped with pressure sensor, two the oil pocket of single play pole pneumatic cylinder is connected with hydraulic oil source 25, is connected with detecting system through the switching-over valves through the tunnelling check valve group. The detection system comprises a variable frequency motor 36 and a dosing pump connected with the variable frequency motor, the dosing pump is a one-way dosing pump 34, the dosing pump is respectively connected with a pressure reducing valve 28 and a first pressure sensor 29 through a high-pressure oil filter 33 and a detection one-way valve 30, the first pressure sensor 29 is connected with the variable frequency motor 36 through a pressure controller 37, the pressure controller 37 is respectively connected with a proportional pressure reducing valve 28 and a second pressure sensor 27, the proportional pressure reducing valve 28 and the second pressure sensor 27 are connected with two single-rod hydraulic cylinders through a reversing valve group, and an energy accumulator 31 is arranged between the first pressure sensor 29 and the detection one-way valve 30.
The tunneling check valve group comprises a first hydraulic control check valve 11, a second hydraulic control check valve 13, a third hydraulic control check valve 16 and a fourth hydraulic control check valve 19; the reversing valve group comprises a first reversing valve 4, a second reversing valve 3, a third reversing valve 1, a fourth reversing valve 6, a fifth reversing valve 22, a sixth reversing valve 14, a seventh reversing valve 10, an eighth reversing valve 15 and a ninth reversing valve 20.
The first reversing valve 4, the second reversing valve 3, the third reversing valve 1 and the fourth reversing valve 6 are two-position two-way electromagnetic one-way valves, and the sixth reversing valve 14, the seventh reversing valve 10, the eighth reversing valve 15 and the ninth reversing valve 20 are two-position three-way electromagnetic reversing valves; the fifth reversing valve 22 is a three-position four-way electromagnetic reversing valve;
when the fifth reversing valve 22 is in the right position, the port A and the port C are communicated, and the port B and the port D are communicated; the port A, the port B and the port D are communicated in the middle position; the port A and the port D are communicated with each other, and the port B and the port C are communicated with each other when the left position is reached; the port C is connected with a hydraulic oil source, and the port D is connected with an oil tank.
When the first reversing valve 4, the second reversing valve 3, the third reversing valve 1 and the fourth reversing valve 6 are in the right position, the port A and the port B are in a disconnected state; the port A is communicated with the port B in the left position.
When the sixth reversing valve 14, the seventh reversing valve 10, the eighth reversing valve 15 and the ninth reversing valve 20 are in the right position, the ports A and B are in a disconnected state; the port A is communicated with the port B in the left position.
In the following embodiment, two sets of tunneling systems and detection systems connected with the tunneling systems are used for detailed description, and the two sets of tunneling systems are respectively a first set of tunneling system and a second set of tunneling system, and the two sets of tunneling systems have the same structure.
The hydraulic oil source 25 provides power for the first set of tunneling system and the second set of tunneling system, and the specific connection relationship is as follows:
the hydraulic oil source 25 is connected with a port B of the proportional speed control valve 24, and a port A of the proportional speed control valve 24 is respectively connected with a port A of the proportional overflow valve 23, a port C of the fifth reversing valve 22 of the first tunneling system and a port C of the fifth reversing valve 22 of the second tunneling system; the oil tank 26 is respectively connected with a port B of the proportional overflow valve 23, a port B of the first safety valve 21 of the first tunneling system, a port D of the fifth reversing valve 22, a port B of the first safety valve 21 of the second tunneling system and a port D of the fifth reversing valve 22;
the connection relationship among the first set of tunneling system components is as follows:
the port A of the fifth reversing valve 22 is respectively connected with the port A of the first safety valve 21, the port B of the first pilot-controlled check valve 11 and the port B of the third pilot-controlled check valve 16; the port A of the first hydraulic control one-way valve 11 is respectively connected with the port B of the first reversing valve 4, the port A of the fifth pressure sensor 7 and the port A of the first single-rod hydraulic cylinder 5; the port A of the third hydraulic control one-way valve 16 is respectively connected with the port B of the third reversing valve 1, the port A of the third pressure sensor 17 and the port A of the second single-rod hydraulic cylinder 12; the port C of the first hydraulic control one-way valve 11 is connected with the port A of the seventh reversing valve 10; the port C of the third hydraulic control one-way valve 16 is connected with the port A of the eighth reversing valve 15; the port C of the seventh reversing valve 10 is connected with the oil tank 26; the port C of the eighth reversing valve 15 is connected with the oil tank 26; the port B of the fifth reversing valve 22 is respectively connected with the port B of the second hydraulic control one-way valve 13 and the port B of the fourth hydraulic control one-way valve 19; the port A of the second hydraulic control one-way valve 13 is respectively connected with the port B of the second reversing valve 3, the port A of the sixth pressure sensor 8 and the port B of the first single-rod hydraulic cylinder 5; the port A of the fourth hydraulic control one-way valve 19 is respectively connected with the port B of the fourth reversing valve 6, the port A of the fourth pressure sensor 18 and the port B of the second single-rod hydraulic cylinder 12; the port C of the second hydraulic control one-way valve 13 is connected with the port A of the sixth reversing valve 14; the port C of the fourth hydraulic control one-way valve 19 is connected with the port A of the ninth reversing valve 20; the port C of the sixth reversing valve 14 is connected with the oil tank 26; the port C of the ninth direction valve 20 is connected to the tank 26.
The connection relation between the detection system and the first set of tunneling system and the second set of tunneling system is as follows:
the port B of the oil filter 35 is connected with the oil tank 26, the port A of the oil filter 35 is connected with the port A of the one-way constant delivery pump 34, the port B of the one-way constant delivery pump 34 is connected with the port B of the oil filter 33, the port A of the oil filter 33 is respectively connected with the port A of the second safety valve 32 and the port B of the detection one-way valve 30, and the port A of the second safety valve 32 is connected with the oil tank 26; the port A of the detection check valve 30 is respectively connected with the port A of the accumulator 31, the port A of the first pressure sensor 29 and the port B of the proportional pressure reducing valve 28, the port C of the proportional pressure reducing valve 28 is connected with the oil tank 26, the port A of the proportional pressure reducing valve 28 is respectively connected with the port A of the second pressure sensor 27, the port A of the third reversing valve 1 of the first tunneling system, the port A of the second reversing valve 3, the port A of the first reversing valve 4, the port A of the fourth reversing valve 6, the port B of the seventh reversing valve 10, the port B of the sixth reversing valve 14, the port B of the eighth reversing valve 15 and the port B of the ninth reversing valve 20, and the port A of a third reversing valve 1, the port A of a second reversing valve 3, the port A of a first reversing valve 4, the port A of a fourth reversing valve 6, the port B of a seventh reversing valve 10, the port B of a sixth reversing valve 14, the port B of an eighth reversing valve 15 and the port B of a ninth reversing valve 20 of the second tunneling system are connected.
A system control loop: the second pressure sensor 27 is connected with a pressure controller 37 through a control line a; the first pressure sensor 29 is connected to the pressure controller 37 through a control line b; the pressure controller 37 is connected to the proportional pressure reducing valve 28 through a control line c; the pressure controller 37 is connected with the variable frequency motor 36 through a control line d.
The working process is as follows:
hydraulic oil source of the detection system: the variable frequency motor 36 rotates, low-pressure oil in the oil tank 26 enters the oil filter 35 through a port B of the oil filter 35, flows out from a port A of the oil filter 35 after passing through the oil filter 35, and flows into the one-way constant delivery pump 34 through the port A of the one-way constant delivery pump 34 and flows out from the port B of the one-way constant delivery pump 34 after being pressurized by the one-way constant delivery pump 34; the hydraulic oil flowing out of the B port of the one-way fixed displacement pump 34 flows into the oil filter 33 through the B port of the oil filter 33, passes through the oil filter 33, and then flows out of the a port of the oil filter 33; the hydraulic oil flowing out of the port A of the oil filter 33 flows into the detection check valve 30 through the port B of the detection check valve 30, and the hydraulic oil flows out of the port A after passing through the detection check valve 30; when the pressure of the hydraulic oil output from the port a of the oil strainer 33 exceeds the pressure preset by the second relief valve 32, the hydraulic oil flows into the second relief valve 32 through the port a of the second relief valve 32, and directly flows into the oil tank 26 through the port B of the second relief valve 32; the hydraulic oil flowing out from the port A of the check valve 30 is detected to flow into the accumulator 31 through the port A of the accumulator 31, flow into the pressure sensor 29 through the port A of the first pressure sensor 29 and flow into the proportional pressure reducing valve 28 through the port B of the proportional pressure reducing valve 28; hydraulic oil flows out from the port A after passing through the proportional pressure reducing valve 28, and part of the hydraulic oil flows into the oil tank 26 through the port C of the proportional pressure reducing valve 28; the second pressure sensor 27 transmits a pressure signal to the pressure controller 37 through a control line a, and the pressure controller 37 controls the proportional pressure reducing valve 28 through a control line c so that the hydraulic system is detected to output hydraulic oil with a set pressure; the first pressure sensor 29 transmits a pressure signal of the accumulator 31 to the pressure controller 37 through a control line b, when the pressure of the accumulator 31 is lower than the preset pressure of the hydraulic system, the pressure controller 38 starts the variable frequency motor 36 through a control line d to charge the accumulator 31, when the pressure of the accumulator 31 exceeds the preset pressure of the hydraulic system, the pressure controller 38 closes the variable frequency motor 36 through the control line d, and at the moment, the accumulator 31 releases high-pressure oil to maintain the pressure of the hydraulic oil required by the hydraulic system.
Hydraulic oil source of the tunneling system: hydraulic oil output by the hydraulic oil source 25 flows into the proportional speed control valve 24 through the port B of the proportional speed control valve 24, the hydraulic oil flows out of the port A of the proportional speed control valve 24 after flowing through the proportional speed control valve 24, and the flow of the hydraulic oil flowing out of the port A of the proportional speed control valve 24 is regulated by the proportional speed control valve 24 in real time; when the pressure of the hydraulic oil output from the port a of the proportional speed control valve 24 exceeds the preset pressure of the proportional relief valve 23, the hydraulic oil flows into the proportional relief valve 23 through the port a of the proportional relief valve 23, flows out from the port B of the proportional relief valve 23 through the proportional relief valve 23, and directly flows into the oil tank 26, and the pressure of the hydraulic oil output from the port a of the proportional speed control valve 24 is controlled by the proportional relief valve 23 in real time.
Detecting whether the hydraulic system has internal leakage or not, taking the first set of tunneling system as an example,
the third reversing valve 1, the second reversing valve 3, the first reversing valve 4 and the fourth reversing valve 6 are all positioned at the right position, and the fifth reversing valve 22 is positioned at the right position; the seventh reversing valve 10 and the eighth reversing valve 15 are located at the left position, so that the first pilot-controlled check valve 11 and the third pilot-controlled check valve 16 are in an open state; the sixth reversing valve 14 and the ninth reversing valve 20 are in the left position, so that the second hydraulic control one-way valve 13 and the fourth hydraulic control one-way valve 19 are in an open state; hydraulic oil at the hydraulic oil source 25 flows into the fifth directional control valve 22 through the port C of the fifth directional control valve 22 and then flows out through the port a; the hydraulic oil flowing out of the port a of the fifth reversing valve 22 flows into the first check valve 11 through the port B of the first pilot-controlled check valve 11 and flows into the third check valve 16 through the port B of the third pilot-controlled check valve 16; hydraulic oil flows out from the port A after passing through the first hydraulic control one-way valve 11; the hydraulic oil flowing out of the port A of the first check valve 11 flows into a fifth pressure sensor 7 and a 5-1 oil cavity (rodless cavity) of the first single-rod hydraulic cylinder 5 respectively; hydraulic oil flows out from the port A after passing through the third hydraulic control one-way valve 16; the hydraulic oil flowing out of the port a of the third hydraulic control check valve 16 flows into a third pressure sensor 17 and a 12-1 oil chamber (rodless chamber) of the second single-rod hydraulic cylinder 12 respectively; under the action of hydraulic oil, the first single-rod hydraulic cylinder 5 and the second single-rod hydraulic cylinder 12 move rightwards, and the positions of the first single-rod hydraulic cylinder and the second single-rod hydraulic cylinder are recorded by the first displacement sensor 2 and the second displacement sensor 9 respectively; the hydraulic oil in the 5-2 oil chamber (rod chamber) of the first single-rod hydraulic cylinder 5 flows out from the port B, and respectively flows into the ports A of the sixth pressure sensor 8 and the second hydraulic control one-way valve 13, the hydraulic pressure in the 12-2 oil chamber (rod chamber) of the second single-rod hydraulic cylinder 12 flows out from the port B, and respectively flows into the fourth pressure sensor 18 and the fourth hydraulic control one-way valve 19, the hydraulic oil flows out from the port B after passing through the second one-way valve 13, and the hydraulic oil flows out from the port B of the fourth hydraulic control one-way valve 19; the hydraulic oil flowing out of the port B of the second hydraulic control check valve 13 and the hydraulic oil flowing out of the port B of the fourth hydraulic control check valve 19 flow into the fifth reversing valve 22 from the port B of the fifth reversing valve 22, and the hydraulic oil flows into the oil tank 26 from the port D of the fifth reversing valve 22; when the hydraulic rod of the first single-rod hydraulic cylinder 5 and the hydraulic rod of the second single-rod hydraulic cylinder 12 are at the rightmost end (fully extended), the fifth directional control valve 22 is switched to the middle position, the seventh directional control valve 10 and the eighth directional control valve 15 are switched to the right position, so that the first pilot-controlled check valve 11 and the third pilot-controlled check valve 16 are in the closed state, and the sixth directional control valve 14 and the ninth directional control valve 20 are kept at the left position, so that the second pilot-controlled check valve 13 and the fourth pilot-controlled check valve 19 are in the open state; the third reversing valve 1 and the first reversing valve 4 are switched to the left position; the second direction valve 3 and the fourth direction valve 6 are kept in the right position; the proportional pressure reducing valve 28 is adjusted to enable the port A of the proportional pressure reducing valve to output 30Mpa of hydraulic oil, the 30Mpa of hydraulic oil respectively flows into the third reversing valve 1 through the port A of the third reversing valve 1 and flows into the first reversing valve 4 through the port A of the first reversing valve 4; the hydraulic oil flows out from the port B of the third reversing valve 1 after passing through the third reversing valve 1, and the hydraulic oil flowing out from the port B of the third reversing valve 1 flows into a third pressure sensor 17 and an oil cavity 12-1 of the second single-rod hydraulic cylinder 12 respectively; the hydraulic oil flows out of the port B of the first reversing valve 4 after passing through the first reversing valve, and the hydraulic oil flowing out of the port B of the first reversing valve 4 flows into a fifth pressure sensor 7 and an oil cavity 5-1 of the first single-rod hydraulic cylinder 5 respectively; when the pressures of the 12-1 oil chamber and the 5-1 oil chamber reach the set pressure of 30MPa, the third reversing valve 1 and the first reversing valve 4 are switched to the right position; the pressure values of the fifth pressure sensor 7 and the third pressure sensor 17 are recorded, a descending curve of the pressure along with the change of time is drawn, and the internal leakage amount of the first single-rod hydraulic rod 5 and the second single-rod hydraulic rod 12 can be respectively calculated.
The starting frictional force in the retraction direction of the hydraulic rod of the first single-rod hydraulic cylinder 5 is detected:
the hydraulic rod of the first single-rod hydraulic cylinder 5 is at the rightmost end (fully extended state); the first reversing valve 4 is positioned at the right position; the second reversing valve 3 is positioned at the left position; the fifth directional valve 22 is in the neutral position; the seventh reversing valve 10 is located at the left position, and the first hydraulic control one-way valve 11 is in an open state; the sixth reversing valve 14 is located at the right position, and the second hydraulic control one-way valve 13 is in a closed state; the pressure of the hydraulic oil output from the port A of the proportional pressure reducing valve 28 is gradually increased from 0 by adjusting the proportional pressure reducing valve; the hydraulic oil output from the port A of the proportional pressure reducing valve 28 flows into the second reversing valve 3 through the port A of the second reversing valve 3, flows out of the port B of the second reversing valve 3 after passing through the second reversing valve 3, and flows into the sixth pressure sensor 8 and the oil cavity 5-2 of the first single-rod hydraulic cylinder respectively; high-pressure oil flowing out of the proportional pressure reducing valve 28 flows into the first hydraulic control one-way valve 11 from the port C of the first hydraulic control one-way valve 11 after passing through the seventh reversing valve 10, so that the first hydraulic control one-way valve 11 is in a conducting state, hydraulic oil in the oil cavity 5-1 of the first single-rod hydraulic cylinder 5 flows out from the port a of the first single-rod hydraulic cylinder 5, hydraulic oil flowing out of the port a of the first single-rod hydraulic cylinder 5 flows into the fifth pressure sensor 7 through the port a of the fifth pressure sensor 7, flows into the first one-way valve 11 through the port a of the first one-way valve 11 and flows out from the port B thereof, and hydraulic oil flowing out of the port B of the first one-way valve 11 flows into the fifth reversing valve 22 through the port a of the fifth reversing valve 22; the hydraulic oil directly flows into the oil tank 26 from the port D after passing through the fifth reversing valve 22; when the first single-rod hydraulic cylinder 5 starts to start, the starting friction force of the first single-rod hydraulic cylinder 5 in the hydraulic rod retraction direction can be detected according to the sixth pressure sensor 8.
Detection of the actuation frictional force in the hydraulic-rod retracting direction of the second single-rod hydraulic cylinder 12:
the hydraulic rod of the second single-rod hydraulic cylinder 12 is at the rightmost end (completely extended state), the fourth reversing valve 6 is located at the left position, the third reversing valve 1 is located at the right position, the fifth reversing valve 22 is located at the middle position, the eighth reversing valve 15 is located at the left position, the third hydraulic control one-way valve 16 is in an open state, the ninth reversing valve 20 is located at the right position, the fourth hydraulic control one-way valve 19 is in a closed state, and the proportional pressure reducing valve 28 is adjusted to enable the pressure of the hydraulic oil output from the port A to be gradually increased from 0; high-pressure oil output from the port A of the proportional pressure reducing valve 28 flows into the fourth reversing valve 6 through the port A of the fourth reversing valve 6, and hydraulic oil flows out from the port B of the fourth reversing valve 6 after passing through the fourth reversing valve 6 and flows into the fourth pressure sensor 18 and the oil cavity 12-2 of the second single-rod hydraulic cylinder 12 respectively; the hydraulic oil in the oil cavity 12-1 of the second single-outlet rod hydraulic cylinder 12 flows out through the port A, the hydraulic oil flowing out from the port A of the second single-outlet rod hydraulic cylinder flows into the third pressure sensor 17 through the port A of the third pressure sensor 17 and flows into the third hydraulic control one-way valve 16 through the port A of the third hydraulic control one-way valve 16, the high-pressure oil flowing out from the proportional pressure reducing valve 28 flows into the third hydraulic control one-way valve 16 through the port C of the third hydraulic control one-way valve 16 after passing through the eighth reversing valve 15, so that the third hydraulic control one-way valve 16 is in a conducting state, the hydraulic oil flowing out from the port A of the second single-outlet rod hydraulic cylinder 12 flows out through the port B of the third hydraulic control one-way valve 16, the hydraulic oil flowing out from the port B of the third hydraulic control one-way valve 16 flows into the fifth reversing valve 22 through the port A of the fifth reversing valve 22 and flows out from the port D of the fifth reversing valve; when the second single-rod hydraulic cylinder 12 starts to start, the starting friction force of the second single-rod hydraulic cylinder 12 in the hydraulic rod retraction direction can be detected according to the fourth pressure sensor 18.
When the hydraulic oil source system is powered off accidentally, the hydraulic oil source 25 cannot continuously provide pressure oil; at the moment, the cutter head stops rotating, the spiral conveyor stops rotating, and the shield tunneling machine stops tunneling; the same parts of the first set of tunneling system and the second set of tunneling system perform the same operation, which specifically comprises the following steps:
the fifth reversing valve 22 is switched to the middle position, the third reversing valve 1 and the first reversing valve 4 are switched to the left position, the second reversing valve 3 and the fourth reversing valve 6 are switched to the right position, the seventh reversing valve 10 is switched to the right position, the first hydraulic control one-way valve 11 is in a closed state, the eighth reversing valve 15 is switched to the right position, the third hydraulic control one-way valve 16 is in a closed state, the sixth reversing valve 14 is switched to the left position, and the second hydraulic control one-way valve 13 is in an open state; the ninth direction valve 20 is switched to the left position and the fourth pilot operated check valve 19 is in the open state.
The pressure reducing valve 28 is adjusted, hydraulic oil output from the port A of the pressure reducing valve 28 respectively flows into the third reversing valve 1 and the first reversing valve 4 through the port A of the third reversing valve 1 and the port A of the first reversing valve 4, and hydraulic oil flowing out of the port B of the third reversing valve 1 respectively flows into the third pressure sensor 17 and the oil cavity 12-1 of the second single-rod hydraulic cylinder 12; hydraulic oil flowing out of the port B of the first reversing valve 4 flows into a fifth pressure sensor 7 through a port A of the fifth pressure sensor 7 and flows into a 5-1 oil cavity through a port A of the first single-rod hydraulic cylinder 5; the hydraulic rod of the first single-rod hydraulic cylinder 5 is kept in a stable state under the action of pressure oil in the 5-1 oil cavity; the hydraulic rod of the second single-rod hydraulic cylinder 12 is kept in a stable state under the action of pressure oil in the 12-1 oil cavity, so that the backward movement of a propulsion system is avoided, and the danger caused by instability of a tunneling surface is prevented.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. The utility model provides a shield that possesses self-checking and safe redundancy advances hydraulic system, its characterized in that, includes one set at least tunnelling system and the detecting system who is connected with it, tunnelling system includes two single pole pneumatic cylinders, two the single pole pneumatic cylinder that goes out all is equipped with displacement sensor, two oil pockets of single pole pneumatic cylinder all are equipped with pressure sensor, two the oil pocket of single pole pneumatic cylinder is connected with hydraulic oil source and detecting system through tunnelling check valve group, switching-over valves.
2. The shield tunneling hydraulic system with the self-detection and the safety redundancy functions as claimed in claim 1, wherein the detection system comprises a variable frequency motor and a fixed displacement pump connected with the variable frequency motor, the fixed displacement pump is respectively connected with a proportional pressure reducing valve and a first pressure sensor through a detection check valve, the first pressure sensor is connected with the variable frequency motor through a pressure controller, the pressure controller is respectively connected with the proportional pressure reducing valve and a second pressure sensor, the proportional pressure reducing valve and the second pressure sensor are connected with two single-rod hydraulic cylinders through a reversing valve group, and an energy accumulator is arranged between the first pressure sensor and the detection check valve.
3. The shield tunneling hydraulic system with self-detection and safety redundancy of claim 1, wherein the tunneling check valve set comprises a first hydraulic control check valve, a second hydraulic control check valve, a third hydraulic control check valve and a fourth hydraulic control check valve; the reversing valve group comprises a first reversing valve, a second reversing valve, a third reversing valve, a fourth reversing valve, a fifth reversing valve, a sixth reversing valve, a seventh reversing valve, an eighth reversing valve and a ninth reversing valve.
4. The shield propulsion hydraulic system with self-detection and safety redundancy as claimed in claim 3, wherein the two oil chambers of the first single-rod hydraulic cylinder are connected with a first hydraulic control check valve and a first reversing valve, and a second hydraulic control check valve and a second reversing valve respectively; two oil chambers of the second single-rod hydraulic cylinder are respectively connected with a third hydraulic control one-way valve and a third reversing valve, and a fourth hydraulic control one-way valve and a fourth reversing valve; the first hydraulic control one-way valve is connected with the detection system through a seventh reversing valve, the second hydraulic control one-way valve is connected with the detection system through a sixth reversing valve, the third hydraulic control one-way valve is connected with the detection system through an eighth reversing valve, and the fourth hydraulic control one-way valve is connected with the detection system through a ninth reversing valve.
5. The shield tunneling hydraulic system with self-detection and safety redundancy according to any one of claims 2-4, wherein the first hydraulic control check valve and the third hydraulic control check valve are connected to the port A of the fifth reversing valve, the port A of the fifth reversing valve is connected to the oil tank through the first safety valve, the second hydraulic control check valve and the fourth hydraulic control check valve are connected to the port B of the fifth reversing valve, the port C of the fifth reversing valve is connected to the port A of the proportional overflow valve and the port A of the proportional speed control valve respectively, the port D of the fifth reversing valve is connected to the port B of the proportional overflow valve and the oil tank respectively, and the port B of the proportional speed control valve is connected to the oil source.
6. A shield propulsion hydraulic system with self-detection and safety redundancy according to claim 5, characterized in that the detection process of whether the tunneling system has internal leakage is as follows:
s1, hydraulic rods of two single-rod hydraulic cylinders are in an extending motion state, a first reversing valve, a third reversing valve, a second reversing valve and a fourth reversing valve are in a right position, a first hydraulic control one-way valve, a second hydraulic control one-way valve, a third hydraulic control one-way valve and a fourth hydraulic control one-way valve are in a left position, and a fifth reversing valve is in a right position; pressure oil flowing out of the hydraulic oil source flows into the rodless cavities of the two single-rod hydraulic cylinders through the fifth reversing valve, the first hydraulic control one-way valve and the third hydraulic control one-way valve, and the two single-rod hydraulic cylinders stretch out under the action of the high-pressure oil;
s2, when the hydraulic rod of the single-rod hydraulic cylinder is located at the maximum extending position, the fifth reversing valve is switched to be located at the middle position, the first hydraulic control one-way valve and the third hydraulic control one-way valve are closed, the first reversing valve and the third reversing valve are opened, pressure oil output by the detection system flows into the two rodless cavities of the single-rod hydraulic cylinder through the first reversing valve and the third reversing valve, when the pressure of the hydraulic oil in the rodless cavities of the two single-rod hydraulic cylinders reaches a preset value, the first reversing valve and the third reversing valve are closed, and the internal leakage amount of the two single-rod hydraulic rods can be respectively calculated through curves of the pressure of the hydraulic oil, recorded by pressure sensors connected with the rodless cavities of the two single-rod hydraulic cylinders, changing along with time.
7. The shield tunneling hydraulic system with self-detection and safety redundancy according to claim 5, wherein the two single-rod hydraulic cylinders are respectively a first single-rod hydraulic cylinder and a second single-rod hydraulic cylinder, and taking the detection of the starting friction force in the retraction direction of the hydraulic rod of the first single-rod hydraulic cylinder as an example, the specific process is that the hydraulic rod of the first single-rod hydraulic cylinder is in a fully extended state, the first reversing valve and the sixth reversing valve are in the right position, the second reversing valve and the seventh reversing valve are in the left position, and the fifth reversing valve is in the middle position; the pressure of the hydraulic oil output by the proportional pressure reducing valve is gradually increased from zero by adjusting the proportional pressure reducing valve, the high-pressure hydraulic oil output by the proportional pressure reducing valve flows into a rod cavity of the first single-rod hydraulic cylinder and a pressure sensor connected with the rod cavity of the first single-rod hydraulic cylinder after passing through the second reversing valve, the high-pressure hydraulic oil output by the proportional pressure reducing valve flows into the first hydraulic control one-way valve after passing through the seventh reversing valve, the first hydraulic control one-way valve is in a conducting state, the hydraulic oil in the rodless cavity of the first single-rod hydraulic cylinder flows into an oil tank through the first hydraulic control one-way valve and the fifth reversing valve, and when the first single-rod hydraulic cylinder starts to start, the starting friction force of the first single-rod hydraulic cylinder in the retraction direction of the hydraulic rod can be detected according to the pressure sensor connected with.
8. The shield propulsion hydraulic system with self-detection and safety redundancy of claim 5, wherein the fifth reversing valve is in a neutral position when the hydraulic oil source is unexpectedly powered off and cannot continue to provide pressure oil; the first reversing valve, the sixth reversing valve, the third reversing valve and the ninth reversing valve are switched to a left position; the second reversing valve, the fourth reversing valve, the seventh reversing valve and the eighth reversing valve are switched to the right position; and adjusting the proportional pressure reducing valve, wherein hydraulic oil output by the proportional pressure reducing valve flows into rodless cavities of the two single-rod hydraulic cylinders through the third reversing valve and the first reversing valve respectively, and the two single-rod hydraulic cylinders are kept in a stable state under the action of pressure oil in the rodless cavities.
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| CN202110032922.0A CN112761648B (en) | 2021-01-12 | 2021-01-12 | Shield that possesses self-checking and safe redundancy impels hydraulic system |
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| CN113606199A (en) * | 2021-08-04 | 2021-11-05 | 盾构及掘进技术国家重点实验室 | Rigidity and damp variable hydraulic control system for shield passive hinged oil cylinder |
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| CN112761648B (en) | 2023-03-21 |
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