CN220667960U - Tightening shield hydraulic control system of small-diameter tunneling equipment - Google Patents
Tightening shield hydraulic control system of small-diameter tunneling equipment Download PDFInfo
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- CN220667960U CN220667960U CN202321717610.4U CN202321717610U CN220667960U CN 220667960 U CN220667960 U CN 220667960U CN 202321717610 U CN202321717610 U CN 202321717610U CN 220667960 U CN220667960 U CN 220667960U
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- 230000005641 tunneling Effects 0.000 title claims description 42
- 239000003381 stabilizer Substances 0.000 claims abstract description 115
- 239000003921 oil Substances 0.000 claims description 399
- 239000010720 hydraulic oil Substances 0.000 claims description 14
- 230000000694 effects Effects 0.000 abstract description 8
- 230000000630 rising effect Effects 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 6
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The tightening shield hydraulic control system comprises a tightening oil cylinder control loop and a stabilizer oil cylinder control loop, wherein the tightening oil cylinder control loop comprises an electrohydraulic reversing valve, a main reversing valve, a first electromagnetic ball valve, a second electromagnetic ball valve and a first proportional pressure reducing valve, the electrohydraulic reversing valve is used for controlling the reversing of the main reversing valve so as to control the stretching action of the tightening oil cylinder, and the first electromagnetic ball valve, the second electromagnetic ball valve and the first proportional pressure reducing valve are used for controlling the pressure rising and pressure releasing of the tightening oil cylinder; the stabilizer cylinder control loop comprises a stabilizer reversing valve, and the stabilizer reversing valve is used for controlling the telescoping action of the stabilizer cylinder. The design is not only provided with a stabilizer oil cylinder control loop, realizes auxiliary tightening of the tightening shield, has good tightening effect, but also realizes quick expansion of the tightening oil cylinder, and quick pressure rise after the tightening oil cylinder stretches out and quick pressure relief before the tightening oil cylinder retracts.
Description
Technical Field
The utility model relates to a hydraulic system, in particular to a tightening shield hydraulic control system of small-diameter tunneling equipment, which is particularly suitable for controlling the tightening shield of the small-diameter tunneling equipment.
Background
The heading machine is widely applied to tunnel construction of water conservancy and hydropower, rail transit and municipal engineering. The traditional heading machine applied to the soft rock stratum realizes the heading process by means of the reaction force obtained by the support of the thrust cylinder on the pipe piece in the heading process. However, small-diameter tunneling equipment for pumped storage or other engineering tunnels is usually used in a working environment of a hard rock stratum, the tunnel is not assembled with a segment in the working process, the small-diameter tunneling equipment is fixed by supporting a rock wall by virtue of a hydraulic supporting system arranged on the supporting shield, and therefore, the supporting shield of the small-diameter tunneling equipment needs to stably support the rock wall; meanwhile, a tightening oil cylinder of small-diameter tunneling equipment needs to be frequently stretched out, tightened and decompressed to retract so as to realize the step change of the shield machine, and in the process, when the tightening oil cylinder stretches, the tightening oil cylinder needs to act rapidly so as to reduce the action time; and when the tightening oil cylinder is retracted, the running stability of the hydraulic system is ensured as much as possible, and the noise and vibration of tunneling equipment caused by the change of the oil pressure in the tightening oil cylinder are avoided. The existing hydraulic control system of the tightening shield of the tunneling equipment does not involve auxiliary support and affects the tightening effect; meanwhile, in the existing tightening shield hydraulic control system, the stretching and retracting speed of the tightening oil cylinder is controlled by mostly depending on a one-way throttle valve in the stretching and retracting process of the supporting cylinder, the stretching speed of the tightening oil cylinder is low, noise and vibration are generated, and stability of tunneling equipment is affected. Therefore, there is a need for a hydraulic control system for a tightening shield for small diameter driving equipment that tightens the rock wall well, and has rapid tightening cylinder movement, low noise and vibration.
Disclosure of Invention
The utility model aims to solve the problems of poor tightening effect of a tightening shield and insufficient rapid action of a tightening oil cylinder and easy generation of noise and vibration in the prior art, and provides a tightening shield hydraulic control system of small-diameter tunneling equipment with good tightening effect, rapid action of the tightening oil cylinder and small noise and vibration.
In order to achieve the above object, the technical solution of the present utility model is:
the hydraulic control system of the tightening shield of the small-diameter tunneling equipment is characterized in that a tightening oil cylinder and a stabilizer oil cylinder are arranged on the tightening shield of the small-diameter tunneling equipment;
the hydraulic control system comprises a tightening oil cylinder control loop and a stabilizer oil cylinder control loop, wherein the tightening oil cylinder control loop comprises an electrohydraulic reversing valve, a main reversing valve, a first electromagnetic ball valve, a second electromagnetic ball valve and a first proportional pressure reducing valve, an oil inlet of the electrohydraulic reversing valve is communicated with a low-pressure oil source, an oil outlet of the electrohydraulic reversing valve is communicated with an oil drain pipeline, two working oil ports of the electrohydraulic reversing valve are respectively communicated with two control ports of the main reversing valve, an oil inlet of the main reversing valve is communicated with the low-pressure oil source, an oil outlet of the main reversing valve is communicated with an oil return pipeline, one working oil port of the main reversing valve is communicated with a rod cavity of the tightening oil cylinder, the other working oil port of the main reversing valve is communicated with a rodless cavity of the tightening oil cylinder, the rodless cavity of the tightening oil cylinder is simultaneously communicated with an oil inlet of the first electromagnetic ball valve and an oil outlet of the second electromagnetic ball valve, the oil inlet of the second electromagnetic ball valve is communicated with the oil drain pipeline, the oil inlet of the first proportional pressure reducing valve is communicated with the oil drain pipeline;
the stabilizer cylinder control loop comprises a stabilizer reversing valve, one working oil port of the stabilizer reversing valve is communicated with a rodless cavity of the stabilizer cylinder, the other working oil port of the stabilizer reversing valve is communicated with a rod cavity of the stabilizer cylinder, an oil outlet of the stabilizer reversing valve is communicated with an oil return pipeline, an oil inlet of the stabilizer reversing valve is communicated with an oil outlet of a second proportional pressure reducing valve, an oil inlet of the second proportional pressure reducing valve is communicated with a high-pressure oil source, and an oil drain port of the second proportional pressure reducing valve is communicated with an oil drain pipeline.
The hydraulic control system further comprises a pressure maintaining loop, the pressure maintaining loop comprises an energy accumulator, a third overflow valve and a stop valve, an oil inlet and an oil outlet of the energy accumulator are simultaneously communicated with an oil inlet of the second electromagnetic ball valve, an oil inlet of the third overflow valve and an oil inlet of the stop valve, and an oil outlet of the third overflow valve and an oil outlet of the stop valve are both communicated with an oil return pipeline.
The hydraulic jack is characterized in that two tightening oil cylinders are arranged on the tightening shield of the small-diameter tunneling equipment, one working oil port of a main reversing valve in a control loop of the tightening oil cylinders is simultaneously communicated with rodless cavities of the two tightening oil cylinders, and the other working oil port of the main reversing valve is simultaneously communicated with rod cavities of the two tightening oil cylinders.
The hydraulic control system comprises two stabilizer cylinder control loops, and two working oil ports of a stabilizer reversing valve in each stabilizer cylinder control loop are respectively communicated with a rodless cavity and a rod cavity of one stabilizer cylinder.
The tightening oil cylinder control loop further comprises a first overflow valve, an oil inlet of the first overflow valve is communicated with a rod cavity of the tightening oil cylinder, and an oil outlet of the first overflow valve is communicated with an oil return pipeline.
The hydraulic control system comprises a hydraulic control cylinder, a hydraulic control cylinder control loop and a hydraulic control cylinder control loop.
The control loop of the tightening oil cylinder further comprises a throttle valve and a one-way valve, the throttle valve is arranged on a connecting pipeline between an oil outlet of the first electromagnetic ball valve and an oil return pipeline, the one-way valve is arranged on a connecting pipeline between the second electromagnetic ball valve and the first proportional pressure reducing valve, an oil inlet of the one-way valve is communicated with an oil outlet of the first proportional pressure reducing valve, and an oil outlet of the one-way valve is communicated with an oil inlet of the second electromagnetic ball valve.
The stabilizer cylinder control loop further comprises a hydraulic control one-way valve, a first one-way throttle valve and a second one-way throttle valve, an oil outlet of the hydraulic control one-way valve is communicated with a rodless cavity of the stabilizer cylinder, a control port of the hydraulic control one-way valve is communicated with a rod cavity of the stabilizer cylinder, an oil inlet of the hydraulic control one-way valve is communicated with one working oil port of the stabilizer reversing valve through the first one-way throttle valve, and the other working oil port of the stabilizer reversing valve is communicated with the rod cavity of the stabilizer cylinder through the second one-way throttle valve.
An oil outlet of the hydraulic control one-way valve is communicated with an oil inlet of the second overflow valve, and an oil outlet of the second overflow valve is communicated with an oil return pipeline.
The hydraulic control system further comprises a first pressure sensor, a second pressure sensor and a third pressure sensor, wherein the first pressure sensor is arranged on a pipeline communicated with the rodless cavity of the tightening oil cylinder, the second pressure sensor is arranged on a pipeline communicated with the rodless cavity of the stabilizer oil cylinder, and the third pressure sensor is arranged on a pipeline communicated with the oil inlet and outlet of the energy accumulator.
Compared with the prior art, the utility model has the beneficial effects that:
1. the hydraulic control system of the tightening shield of the small-diameter tunneling equipment comprises a tightening oil cylinder control loop, a stabilizer oil cylinder control loop and a pressure maintaining loop, wherein the tightening oil cylinder control loop is used for controlling the tightening oil cylinder to stretch and retract, so that a supporting shoe in the tightening shield can tighten a rock wall; meanwhile, the stabilizer cylinder control loop controls the stabilizer cylinder to assist in tightening the tightening shield, so that the tightening shield of the tunneling equipment can be more stably tightened and fixed on the rock wall, and the tightening effect is good; the pressure maintaining loop tightening shield achieves good pressure maintaining effect in the tightening state, so that tunneling equipment can safely operate. Therefore, the hydraulic control system of the tightening shield comprises a tightening oil cylinder control loop, a stabilizer oil cylinder control loop and a pressure maintaining loop, the tightening shield can be stably tightened and fixed on the rock wall, the pressure maintaining effect is good, and tunneling equipment can work safely.
2. According to the tightening shield hydraulic control system of the small-diameter tunneling equipment, a rodless cavity of a tightening cylinder is simultaneously communicated with an oil inlet of a first electromagnetic ball valve and an oil outlet of a second electromagnetic ball valve, the oil outlet of the first electromagnetic ball valve is communicated with an oil return pipeline, the oil inlet of the second electromagnetic ball valve is communicated with the oil outlet of a first proportional pressure reducing valve, the oil inlet of the first proportional pressure reducing valve is communicated with a high-pressure oil source, when the tightening shield needs to be tightened, the tightening cylinder stretches out, then the tightening cylinder is boosted, in the boosting process, the first electromagnetic ball valve is disconnected when the first electromagnetic ball valve is in power failure, the second electromagnetic ball valve is electrically conducted, hydraulic oil in the high-pressure oil source flows through the second electromagnetic ball valve after being depressurized by the first proportional pressure reducing valve and enters the rodless cavity of the tightening cylinder, and the oil pressure in the rodless cavity of the tightening cylinder rises; when a tunneling stroke is finished and the tightening shield needs to be moved to the next position, pressure relief is performed before the tightening oil cylinder is retracted, at the moment, the first electromagnetic ball valve is controlled to be electrically conducted, the second electromagnetic ball valve is disconnected when the power is lost, high-pressure oil in the rodless cavity of the tightening oil cylinder flows into an oil return pipeline through the first electromagnetic ball valve and the throttle valve, the pressure in the rodless cavity of the tightening oil cylinder does not change severely when the tightening oil cylinder acts, and noise and vibration generated when the tightening oil cylinder stretches are effectively reduced. Therefore, the quick boosting and pressure releasing control of the tightening oil cylinder is realized through the first electromagnetic ball valve and the second electromagnetic ball valve in the design, noise and vibration generated when the tightening oil cylinder stretches and contracts are reduced, and the system operates more stably.
3. The pressure maintaining loop in the tightening shield hydraulic control system of the small-diameter tunneling equipment comprises an energy accumulator, a third overflow valve and a stop valve, wherein an oil inlet and an oil outlet of the energy accumulator are simultaneously communicated with an oil inlet of a second electromagnetic ball valve, an oil inlet of the third overflow valve and an oil inlet of the stop valve, an oil outlet of the third overflow valve and an oil outlet of the stop valve are both communicated with an oil return pipeline, hydraulic oil in a high-pressure oil source enters the energy accumulator after being depressurized by a first proportional depressurization valve and compresses an energy accumulator diaphragm, and after the tightening oil cylinder is pressurized, the energy accumulator plays a role in maintaining pressure, so that the tightening shield can stably tighten the rock wall, and the tunneling equipment can safely operate. Therefore, the energy accumulator plays a role in maintaining pressure, the pressure in the rodless cavity of the tightening oil cylinder is stable after the tightening oil cylinder is boosted, the tightening shield can stably tighten the rock wall, and the tunneling equipment can safely operate.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
In the figure: the hydraulic control system comprises a tightening oil cylinder control loop 1, a tightening oil cylinder 10, an electro-hydraulic reversing valve 11, a main reversing valve 12, a first electromagnetic ball valve 13, a second electromagnetic ball valve 14, a first proportional pressure reducing valve 15, a first overflow valve 16, a double hydraulic control one-way valve 17, a throttle valve 18, a one-way valve 19, a stabilizer oil cylinder control loop 2, a stabilizer oil cylinder 20, a stabilizer reversing valve 21, a hydraulic control one-way valve 22, a first one-way throttle valve 23, a second one-way throttle valve 24, a pressure maintaining loop 3, an accumulator 31, a third overflow valve 32, a stop valve 33, a second proportional pressure reducing valve 4, a first pressure sensor 51, a second pressure sensor 52, a third pressure sensor 53, a high-pressure oil source P1, a low-pressure oil source P2, an oil return pipeline Q and a drain pipeline D.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings and detailed description.
Referring to fig. 1, a tightening shield hydraulic control system of small-diameter tunneling equipment is provided with a tightening cylinder 10 and a stabilizer cylinder 20;
the hydraulic control system comprises a tightening oil cylinder control loop 1 and a stabilizer oil cylinder control loop 2, wherein the tightening oil cylinder control loop 1 comprises an electrohydraulic reversing valve 11, a main reversing valve 12, a first electromagnetic ball valve 13, a second electromagnetic ball valve 14 and a first proportional pressure reducing valve 15, the electrohydraulic reversing valve 11 is a four-position three-way reversing valve with a Y-shaped median function, the main reversing valve 12 is a hydraulically controlled four-position three-way reversing valve with the Y-shaped median function, the four-position three-way reversing valve with the Y-shaped median function is stable in reversing, large in flushing quantity, capable of realizing floating and beneficial to system pressure maintaining.
The oil inlet of the electrohydraulic reversing valve 11 is communicated with a low-pressure oil source P2, the oil outlet of the electrohydraulic reversing valve 11 is communicated with an oil drain pipeline D, two working oil ports of the electrohydraulic reversing valve 11 are respectively communicated with two control ports of the main reversing valve 12, the oil inlet of the main reversing valve 12 is communicated with the low-pressure oil source P2, the oil outlet of the main reversing valve 12 is communicated with an oil return pipeline Q, two working oil ports of the main reversing valve 12 are respectively communicated with a rod cavity of the tightening oil cylinder 10 and a rodless cavity of the tightening oil cylinder 10, the rodless cavity of the tightening oil cylinder 10 is simultaneously communicated with the oil inlet of the first electromagnetic ball valve 13 and the oil outlet of the second electromagnetic ball valve 14, the oil outlet of the first electromagnetic ball valve 13 is communicated with the oil return pipeline Q, the oil inlet of the second electromagnetic ball valve 14 is communicated with the oil outlet of the first proportional pressure reducing valve 15, the oil inlet of the first proportional pressure reducing valve 15 is communicated with the high-pressure oil source P1, and the oil drain port of the first proportional pressure reducing valve 15 is communicated with the oil drain pipeline D. The first electromagnetic ball valve 13 and the second electromagnetic ball valve 14 are used for controlling the tightening oil cylinder 10 to boost and release pressure, and the first proportional pressure reducing valve 15 is used for ensuring that the final pressure in the rodless cavity of the tightening oil cylinder 10 after boosting is consistent with the set value of the first proportional pressure reducing valve 15. The tightening cylinder control loop 1 is used for controlling the tightening cylinder 10, and further controlling the tightening boots connected to the tightening cylinder 10 to tighten the rock wall in the tunnel.
The stabilizer cylinder control loop 2 comprises a stabilizer reversing valve 21, two working oil ports of the stabilizer reversing valve 21 are respectively communicated with a rodless cavity and a rod cavity of the stabilizer cylinder 20, an oil outlet of the stabilizer reversing valve 21 is communicated with an oil return pipeline Q, an oil inlet of the stabilizer reversing valve 21 is communicated with an oil outlet of a second proportional pressure reducing valve 4, an oil inlet of the second proportional pressure reducing valve 4 is communicated with a high-pressure oil source P1, and an oil drain port of the second proportional pressure reducing valve 4 is communicated with an oil drain pipeline D. The stabilizer cylinder control loop 2 is used for controlling the stabilizer cylinder 20, and the stabilizer cylinder 20 provides auxiliary support for the tightening shield in the tightening shield tightening state (namely in the state that the tightening shield is tightened by the tightening shoe), so that the tightening shield can be more reliably tightened.
The high-pressure oil source P1 provides high-pressure small-flow input for the hydraulic system, and the low-pressure oil source P2 provides low-pressure large-flow input for the hydraulic system. And the hydraulic system can extend out in a low-pressure state, retract in a high-pressure state and retract in a pressure release state of the tightening oil cylinder 10, and the tightening oil cylinder 10 runs stably and stretches out and draws back to generate low noise and vibration. The oil return pipeline Q is used for returning system working oil, and is large in flow and thick in pipe diameter; the oil leakage pipeline D is used for guaranteeing the pressure of a control cavity of the valve body, and is small in internal flow and small in pipe diameter.
The hydraulic control system further comprises a pressure maintaining loop 3, the pressure maintaining loop 3 comprises an energy accumulator 31, a third overflow valve 32 and a stop valve 33, an oil inlet and an oil outlet of the energy accumulator 31 are simultaneously communicated with an oil inlet of the second electromagnetic ball valve 14, an oil inlet of the third overflow valve 32 and an oil inlet of the stop valve 33, and an oil outlet of the third overflow valve 32 and an oil outlet of the stop valve 33 are both communicated with an oil return pipeline Q. The pressure maintaining loop 3 can ensure that the pressure in the rodless cavity of the tightening oil cylinder is stable after the pressure is increased, so that the tightening shield can stably tighten the rock wall, and the tunneling equipment can safely operate.
Two tightening oil cylinders 10 are arranged on the tightening shield of the small-diameter tunneling device, one working oil port of a main reversing valve 12 in the tightening oil cylinder control loop 1 is simultaneously communicated with rodless cavities of the two tightening oil cylinders 10, and the other working oil port of the main reversing valve 12 is simultaneously communicated with rod cavities of the two tightening oil cylinders 10. The multiple tightening cylinders 10 can support the design of split type supporting shoes of small-diameter tunneling equipment, and each tightening cylinder 10 can control the telescopic action of a group of supporting shoes.
The hydraulic control system comprises two stabilizer cylinder control loops 2 which are in one-to-one correspondence with the stabilizer cylinders 20, and two working oil ports of a stabilizer reversing valve 21 in each stabilizer cylinder control loop 2 are respectively communicated with a rodless cavity and a rod cavity of a corresponding one of the stabilizer cylinders 20. The design of the two stabilizer cylinders 20 can further assist in tightening the shield to tighten the rock wall, and the tightening effect is good. And, two stabilizer cylinders 20 are controlled by a stabilizer cylinder control loop 2 respectively, and the two stabilizer cylinders 20 can independently act to ensure the control flexibility of the stabilizer under the auxiliary tightening or special conditions.
The tightening oil cylinder control loop 1 further comprises a first overflow valve 16, an oil inlet of the first overflow valve 16 is communicated with a rod cavity of the tightening oil cylinder 10, and an oil outlet of the first overflow valve 16 is communicated with an oil return pipeline Q. The first relief valve 16 serves to prevent overpressure in the system.
The two working oil ports of the main reversing valve 12 are communicated with the rod cavities of the two tightening oil cylinders 10 and the rodless cavities of the two tightening oil cylinders 10 through double-pilot-operated check valves 17, one working oil port (B port) of the main reversing valve 12 is communicated with the first oil inlet of the double-pilot-operated check valve 17, the first oil outlet of the double-pilot-operated check valve 17 is communicated with the rodless cavities of the two tightening oil cylinders 10, the second oil inlet of the double-pilot-operated check valve 17 is communicated with the other working oil port (A port) of the main reversing valve 12, and the second oil outlet of the double-pilot-operated check valve 17 is communicated with the rod cavities of the two tightening oil cylinders 10.
The tightening oil cylinder control loop 1 further comprises a throttle valve 18 and a one-way valve 19, wherein the throttle valve 18 is arranged on a connecting pipeline between an oil outlet of the first electromagnetic ball valve 13 and the oil return pipeline Q, the throttle valve 18 controls the pressure release speed of the tightening oil cylinder 10, the one-way valve 19 is arranged on a connecting pipeline between the second electromagnetic ball valve 14 and the first proportional pressure reducing valve 15, an oil inlet of the one-way valve 19 is communicated with an oil outlet of the first proportional pressure reducing valve 15, and an oil outlet of the one-way valve 19 is communicated with an oil inlet of the second electromagnetic ball valve 14.
The rodless cavity of the stabilizer cylinder 20 is communicated with the oil outlet of the hydraulic control one-way valve 22, the control port of the hydraulic control one-way valve 22 is communicated with the rod cavity of the stabilizer cylinder 20, the oil inlet of the hydraulic control one-way valve 22 is communicated with one working oil port of the stabilizer reversing valve 21 through a first one-way throttle valve 23, the other working oil port of the stabilizer reversing valve 21 is communicated with the rod cavity of the stabilizer cylinder 20 through a second one-way throttle valve 24, and the first one-way throttle valve 23 and the second one-way throttle valve 24 are used for controlling the expansion speed of the stabilizer cylinder 20.
The oil outlet of the hydraulic control one-way valve 22 is communicated with the oil inlet of the second overflow valve 25, the oil outlet of the second overflow valve 25 is communicated with the oil return pipeline Q, and the second overflow valve 25 prevents the system from being over-pressurized.
The hydraulic control system further comprises a first pressure sensor 51, a second pressure sensor 52 and a third pressure sensor 53, wherein the first pressure sensor 51 is arranged on a pipeline communicated with the rodless cavity of the tightening cylinder 10, the second pressure sensor 52 is arranged on a pipeline communicated with the rodless cavity of the stabilizer cylinder 20, and the third pressure sensor 53 is arranged on a pipeline communicated with the oil inlet and outlet of the accumulator 31. The first pressure sensor 51, the second pressure sensor 52, and the third pressure sensor 53 are used to monitor the system pressure.
The principle of the utility model is explained as follows:
the tunneling equipment can be TBM (tunnel boring machine), namely Tunnel Boring Machine), and when the small-diameter tunneling equipment works, the tightening shield hydraulic control system can realize the actions of stretching the tightening cylinder 10, boosting the tightening cylinder 10, decompressing the tightening cylinder 10, retracting the tightening cylinder 10, stretching the stabilizer cylinder 20 and retracting the stabilizer cylinder 20.
Wherein, prop up tight hydro-cylinder 10 and stretch out the action: the first electromagnetic ball valve 13 is controlled to be in power-off state, the second electromagnetic ball valve 14 is controlled to be in power-off state, the left-position work of the electro-hydraulic reversing valve 11 is controlled, low-pressure hydraulic oil in the low-pressure oil source P2 flows into a control port on the right side of the main reversing valve 12, the right-position work of the main reversing valve 12 is controlled, the low-pressure hydraulic oil in the low-pressure oil source P2 sequentially passes through the main reversing valve 12 and the double-hydraulic control one-way valve 17 and flows into a rodless cavity of the tightening oil cylinder 10, and the hydraulic oil in a rod cavity of the tightening oil cylinder 10 sequentially flows back to the oil return pipeline Q through the double-hydraulic control one-way valve 17 and the main reversing valve 12, so that the tightening oil cylinder 10 stretches out.
Boosting action of the tightening cylinder 10: after the tightening cylinder 10 stretches out, the first electromagnetic ball valve 13 is controlled to be powered off, the second electromagnetic ball valve 14 is controlled to be electrically conducted, high-pressure hydraulic oil in the high-pressure oil source P1 is depressurized by the first proportional pressure reducing valve 15 and then is communicated with a rodless cavity of the tightening cylinder 10 through the one-way valve 19 and the second electromagnetic ball valve 14, at the moment, the oil pressure in the tightening cylinder 10 rises until the pressure of the rodless cavity of the tightening cylinder 10 is consistent with a set value of the first proportional pressure reducing valve 15, the pressure in the tightening cylinder is stable, and the tightening cylinder 10 is pressurized. The high-pressure hydraulic oil in the high-pressure oil source P1 flows into the accumulator 31 through the one-way valve 19 after being depressurized by the first proportional depressurization valve 15 while the pressure of the tightening oil cylinder 10 is increased, the diaphragm of the accumulator 31 is compressed, the accumulator 31 plays a role in keeping the pressure of the rodless cavity of the tightening oil cylinder 10 after the pressure of the tightening oil cylinder 10 is increased, and at the moment, the tightening oil cylinder 10 compresses the tightening shoe on the rock wall and tightens the tightening shield.
The pressure release action of the tightening oil cylinder 10: after the tightening shield is tightened, when a tunneling stroke is finished and the tightening shield needs to be moved to the next position, pressure is released before the tightening cylinder 10 is retracted. When the tightening oil cylinder 10 is depressurized, the first electromagnetic ball valve 13 is controlled to be electrically conducted, the second electromagnetic ball valve 14 is controlled to be electrically disconnected, hydraulic oil in a rodless cavity of the tightening oil cylinder is sequentially communicated with the oil return pipeline Q through the first electromagnetic ball valve 13 and the throttle valve 18, at the moment, the oil pressure in the rodless cavity of the tightening oil cylinder 10 is reduced, and the tightening oil cylinder 10 is depressurized.
Retraction of the tightening cylinder 10: after the tensioning cylinder 10 is depressurized, the first electromagnetic ball valve 13 is controlled to be in power-off state, the second electromagnetic ball valve 14 is controlled to be in power-off state, the right-position work of the electro-hydraulic reversing valve 11 is controlled, low-pressure hydraulic oil in the low-pressure oil source P2 flows into a control port on the left side of the main reversing valve 12, the left-position work of the main reversing valve 12 is carried out, the low-pressure hydraulic oil in the low-pressure oil source P2 flows into a rod cavity of the tensioning cylinder 10 after sequentially passing through the main reversing valve 12 and the double-hydraulic one-way valve 17, and the hydraulic oil in a rodless cavity of the tensioning cylinder 10 sequentially flows back to the oil return pipeline Q after sequentially passing through the double-hydraulic one-way valve 17 and the main reversing valve 12, and at the moment, the tensioning cylinder 10 is retracted.
Stabilizer cylinder 20 extension action: the right position of the stabilizer reversing valve 21 is controlled to work, and high-pressure oil in the high-pressure oil source P1 is decompressed by the second proportional decompression valve 4 and then sequentially enters a rodless cavity of the stabilizer cylinder 20 through the stabilizer reversing valve 21, the first one-way throttle valve 23 and the hydraulic control one-way valve 22; meanwhile, hydraulic oil in the rod cavity of the stabilizer cylinder 20 sequentially flows back to the oil return pipeline Q through the second one-way throttle valve 24 and the stabilizer reversing valve 21, and the stabilizer cylinder 20 stretches out.
Stabilizer cylinder 20 retraction action: the left position of the stabilizer reversing valve 21 is controlled to work, and high-pressure oil in the high-pressure oil source P1 is decompressed by the second proportional decompression valve 4 and then flows into a rod cavity of the stabilizer cylinder 20 through the stabilizer reversing valve 21 and the second one-way throttle valve 24 in sequence; meanwhile, hydraulic oil in the rodless cavity of the stabilizer cylinder 20 flows back to the oil return pipeline Q through the hydraulic control one-way valve 22, the first one-way throttle valve 23 and the stabilizer reversing valve 21 in sequence.
Example 1:
a tightening oil cylinder 10 and a stabilizer oil cylinder 20 are arranged on a tightening shield of the tightening device of the small-diameter tunneling equipment;
the hydraulic control system comprises a tightening cylinder control loop 1 and a stabilizer cylinder control loop 2, wherein the tightening cylinder control loop 1 comprises an electrohydraulic reversing valve 11, a main reversing valve 12, a first electromagnetic ball valve 13, a second electromagnetic ball valve 14 and a first proportional pressure reducing valve 15, an oil inlet of the electrohydraulic reversing valve 11 is communicated with a low-pressure oil source P2, an oil outlet of the electrohydraulic reversing valve 11 is communicated with an oil drain pipeline D, two working oil ports of the electrohydraulic reversing valve 11 are respectively communicated with two control ports of the main reversing valve 12, an oil inlet of the main reversing valve 12 is communicated with a low-pressure oil source P2, an oil outlet of the main reversing valve 12 is communicated with an oil return pipeline Q, two working oil ports of the main reversing valve 12 are respectively communicated with a rod cavity of the tightening cylinder 10 and a rodless cavity of the tightening cylinder 10, the rodless cavity of the tightening cylinder 10 is simultaneously communicated with an oil inlet of the first electromagnetic ball valve 13 and an oil outlet of the second electromagnetic ball valve 14, an oil outlet of the first electromagnetic ball valve 13 is communicated with an oil outlet of the high-pressure reducing valve 15, and an oil outlet of the first proportional pressure reducing valve 15 is communicated with the oil outlet of the first electromagnetic ball valve 1; the stabilizer cylinder control loop 2 comprises a stabilizer reversing valve 21, two working oil ports of the stabilizer reversing valve 21 are respectively communicated with a rodless cavity and a rod cavity of the stabilizer cylinder 20, an oil outlet of the stabilizer reversing valve 21 is communicated with an oil return pipeline Q, an oil inlet of the stabilizer reversing valve 21 is communicated with an oil outlet of a second proportional pressure reducing valve 4, and an oil inlet of the second proportional pressure reducing valve 4 is communicated with a high-pressure oil source P1; the hydraulic control system further comprises a pressure maintaining loop 3, the pressure maintaining loop 3 comprises an energy accumulator 31, a third overflow valve 32 and a stop valve 33, an oil inlet and an oil outlet of the energy accumulator 31 are simultaneously communicated with an oil inlet of the second electromagnetic ball valve 14, an oil inlet of the third overflow valve 32 and an oil inlet of the stop valve 33, and an oil outlet of the third overflow valve 32 and an oil outlet of the stop valve 33 are both communicated with an oil return pipeline Q; two tightening oil cylinders 10 are arranged in the tightening device of the small-diameter tunneling equipment, one working oil port of a main reversing valve 12 in the tightening oil cylinder control loop 1 is simultaneously communicated with rodless cavities of the two tightening oil cylinders 10, and the other working oil port of the main reversing valve 12 is simultaneously communicated with rod cavities of the two tightening oil cylinders 10; the small-diameter tunneling equipment tightening device is internally provided with two stabilizer cylinders 20, the hydraulic control system comprises two stabilizer cylinder control loops 2, and two working oil ports of a stabilizer reversing valve 21 in each stabilizer cylinder control loop 2 are respectively communicated with a rodless cavity and a rod cavity of one stabilizer cylinder 20.
Example 2:
example 2 is substantially the same as example 1 except that:
the tightening oil cylinder control loop 1 further comprises a first overflow valve 16, an oil inlet of the first overflow valve 16 is communicated with a rod cavity of the tightening oil cylinder 10, and an oil outlet of the first overflow valve 16 is communicated with an oil return pipeline Q; the two working oil ports of the main reversing valve 12 are communicated with rod cavities of the two tightening oil cylinders 10 and rodless cavities of the two tightening oil cylinders 10 through double-pilot-operated check valves 17, one working oil port of the main reversing valve 12 is communicated with a first oil inlet of the double-pilot-operated check valve 17, a first oil outlet of the double-pilot-operated check valve 17 is communicated with the rodless cavities of the two tightening oil cylinders 10, a second oil inlet of the double-pilot-operated check valve 17 is communicated with the other working oil port of the main reversing valve 12, and a second oil outlet of the double-pilot-operated check valve 17 is communicated with the rod cavities of the two tightening oil cylinders 10; the tightening oil cylinder control loop 1 further comprises a throttle valve 18 and a one-way valve 19, wherein the throttle valve 18 is arranged on a connecting pipeline between an oil outlet of the first electromagnetic ball valve 13 and the oil return pipeline Q, the one-way valve 19 is arranged on a connecting pipeline between the second electromagnetic ball valve 14 and the first proportional reducing valve 15, an oil inlet of the one-way valve 19 is communicated with an oil outlet of the first proportional reducing valve 15, and an oil outlet of the one-way valve 19 is communicated with an oil inlet of the second electromagnetic ball valve 14.
Example 3:
example 3 is substantially the same as example 2 except that:
the rodless cavity of the stabilizer cylinder 20 is communicated with the oil outlet of the hydraulic control one-way valve 22, the control port of the hydraulic control one-way valve 22 is communicated with the rod cavity of the stabilizer cylinder 20, the oil inlet of the hydraulic control one-way valve 22 is communicated with one working oil port of the stabilizer reversing valve 21 through a first one-way throttle valve 23, and the other working oil port of the stabilizer reversing valve 21 is communicated with the rod cavity of the stabilizer cylinder 20 through a second one-way throttle valve 24; an oil outlet of the hydraulic control one-way valve 22 is communicated with an oil inlet of the second overflow valve 25, and an oil outlet of the second overflow valve 25 is communicated with an oil return pipeline Q; the hydraulic control system further comprises a first pressure sensor 51, a second pressure sensor 52 and a third pressure sensor 53, wherein the first pressure sensor 51 is arranged on a pipeline communicated with the rodless cavity of the tightening cylinder 10, the second pressure sensor 52 is arranged on a pipeline communicated with the rodless cavity of the stabilizer cylinder 20, and the third pressure sensor 53 is arranged on a pipeline communicated with the oil inlet and outlet of the accumulator 31.
The above description is merely of preferred embodiments of the present utility model, and the scope of the present utility model is not limited to the above embodiments, but all equivalent modifications or variations according to the present disclosure will be within the scope of the claims.
Claims (10)
1. The utility model provides a tight shield hydraulic control system of propping of minor diameter tunneling equipment which characterized in that:
the hydraulic control system comprises a tightening oil cylinder control loop (1) and a stabilizer oil cylinder control loop (2), wherein the tightening oil cylinder control loop (1) comprises an electrohydraulic reversing valve (11), a main reversing valve (12), a first electromagnetic ball valve (13), a second electromagnetic ball valve (14) and a first proportional reducing valve (15), an oil inlet of the electrohydraulic reversing valve (11) is communicated with a low-pressure oil source (P2), an oil outlet of the electrohydraulic reversing valve (11) is communicated with an oil drain pipeline (D), two working oil ports of the electrohydraulic reversing valve (11) are respectively communicated with two control ports of a main reversing valve (12), an oil inlet of the main reversing valve (12) is communicated with the low-pressure oil source (P2), an oil outlet of the main reversing valve (12) is communicated with an oil return pipeline (Q), one working port of the main reversing valve (12) is communicated with a rod cavity of the tightening oil cylinder (10), an oil outlet of the other working port of the main reversing valve (12) is communicated with a ball valve (13) of the tightening oil cylinder (10) and is communicated with the first electromagnetic ball valve (13) of the oil return pipeline (Q), an oil inlet of the second electromagnetic ball valve (14) is communicated with an oil outlet of the first proportional pressure reducing valve (15), and an oil inlet of the first proportional pressure reducing valve (15) is communicated with a high-pressure oil source (P1);
the stabilizer oil cylinder control loop (2) comprises a stabilizer reversing valve (21), one working oil port of the stabilizer reversing valve (21) is communicated with a rodless cavity of the stabilizer oil cylinder (20), the other working oil port of the stabilizer reversing valve (21) is communicated with a rod cavity of the stabilizer oil cylinder (20), an oil outlet of the stabilizer reversing valve (21) is communicated with an oil return pipeline (Q), an oil inlet of the stabilizer reversing valve (21) is communicated with an oil outlet of a second proportional pressure reducing valve (4), and an oil inlet of the second proportional pressure reducing valve (4) is communicated with a high-pressure oil source (P1).
2. The tight shield hydraulic control system of small diameter tunneling apparatus according to claim 1, wherein:
the hydraulic control system further comprises a pressure maintaining loop (3), the pressure maintaining loop (3) comprises an energy accumulator (31), a third overflow valve (32) and a stop valve (33), an oil inlet and an oil outlet of the energy accumulator (31) are simultaneously communicated with an oil inlet of the second electromagnetic ball valve (14), an oil inlet of the third overflow valve (32) and an oil inlet of the stop valve (33), and an oil outlet of the third overflow valve (32) and an oil outlet of the stop valve (33) are both communicated with an oil return pipeline (Q).
3. The tight shield hydraulic control system of small diameter tunneling apparatus according to claim 2, wherein:
two tightening oil cylinders (10) are arranged on the tightening shield of the small-diameter tunneling device, one working oil port of the main reversing valve (12) is simultaneously communicated with rodless cavities of the two tightening oil cylinders (10), and the other working oil port of the main reversing valve (12) is simultaneously communicated with rod cavities of the two tightening oil cylinders (10).
4. A compact shield hydraulic control system for small diameter tunnelling equipment as claimed in claim 3, wherein:
the hydraulic control system comprises two stabilizer oil cylinder control loops (2), and two working oil ports of each stabilizer reversing valve (21) are respectively communicated with a rodless cavity and a rod cavity of one stabilizer oil cylinder (20).
5. A tightening shield hydraulic control system of small diameter tunnelling equipment as claimed in any one of claims 1 to 4, wherein:
the tightening oil cylinder control loop (1) further comprises a first overflow valve (16), an oil inlet of the first overflow valve (16) is communicated with a rod cavity of the tightening oil cylinder (10), and an oil outlet of the first overflow valve (16) is communicated with an oil return pipeline (Q).
6. The tight shield hydraulic control system of small diameter tunneling apparatus according to claim 5, wherein:
the hydraulic control system is characterized in that the tightening oil cylinder control loop (1) further comprises a double hydraulic control one-way valve (17), one working oil port of the main reversing valve (12) is communicated with a first oil inlet of the double hydraulic control one-way valve (17), a first oil outlet of the double hydraulic control one-way valve (17) is communicated with a rod cavity of the tightening oil cylinder (10), a second oil inlet of the double hydraulic control one-way valve (17) is communicated with the other working oil port of the main reversing valve (12), and a second oil outlet of the double hydraulic control one-way valve (17) is communicated with a rodless cavity of the tightening oil cylinder (10).
7. The tight shield hydraulic control system of small diameter tunneling apparatus of claim 6, wherein:
the hydraulic oil cylinder control loop (1) is characterized by further comprising a throttle valve (18) and a one-way valve (19), wherein the throttle valve (18) is arranged on a connecting pipeline between an oil outlet of the first electromagnetic ball valve (13) and an oil return pipeline (Q), the one-way valve (19) is arranged on a connecting pipeline between the second electromagnetic ball valve (14) and the first proportional pressure reducing valve (15), an oil inlet of the one-way valve (19) is communicated with an oil outlet of the first proportional pressure reducing valve (15), and an oil outlet of the one-way valve (19) is communicated with an oil inlet of the second electromagnetic ball valve (14).
8. A tightening shield hydraulic control system of small diameter tunnelling equipment as claimed in any one of claims 2 to 4, wherein:
the stabilizer cylinder control loop (2) further comprises a hydraulic control one-way valve (22), a first one-way throttle valve (23) and a second one-way throttle valve (24), an oil outlet of the hydraulic control one-way valve (22) is communicated with a rodless cavity of the stabilizer cylinder (20), a control port of the hydraulic control one-way valve (22) is communicated with a rod cavity of the stabilizer cylinder (20), an oil inlet of the hydraulic control one-way valve (22) is communicated with one working oil port of the stabilizer reversing valve (21) through the first one-way throttle valve (23), and the other working oil port of the stabilizer reversing valve (21) is communicated with the rod cavity of the stabilizer cylinder (20) through the second one-way throttle valve (24).
9. The tight shield hydraulic control system of small diameter tunneling apparatus according to claim 8, wherein:
an oil outlet of the hydraulic control one-way valve (22) is communicated with an oil inlet of the second overflow valve (25), and an oil outlet of the second overflow valve (25) is communicated with an oil return pipeline (Q).
10. The tight shield hydraulic control system of small diameter tunneling apparatus of claim 9, wherein:
a first pressure sensor (51) is arranged on a pipeline communicated with the rodless cavity of the tightening oil cylinder (10), a second pressure sensor (52) is arranged on a pipeline communicated with the rodless cavity of the stabilizer oil cylinder (20), and a third pressure sensor (53) is arranged on a pipeline communicated with the oil inlet and outlet of the energy accumulator (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321717610.4U CN220667960U (en) | 2023-07-03 | 2023-07-03 | Tightening shield hydraulic control system of small-diameter tunneling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321717610.4U CN220667960U (en) | 2023-07-03 | 2023-07-03 | Tightening shield hydraulic control system of small-diameter tunneling equipment |
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| Publication Number | Publication Date |
|---|---|
| CN220667960U true CN220667960U (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321717610.4U Active CN220667960U (en) | 2023-07-03 | 2023-07-03 | Tightening shield hydraulic control system of small-diameter tunneling equipment |
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| Country | Link |
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| CN (1) | CN220667960U (en) |
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2023
- 2023-07-03 CN CN202321717610.4U patent/CN220667960U/en active Active
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