CN114427552B - Shield pipeline extension mechanism pipe replacement hydraulic control system and shield machine - Google Patents
Shield pipeline extension mechanism pipe replacement hydraulic control system and shield machine Download PDFInfo
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- CN114427552B CN114427552B CN202210094374.9A CN202210094374A CN114427552B CN 114427552 B CN114427552 B CN 114427552B CN 202210094374 A CN202210094374 A CN 202210094374A CN 114427552 B CN114427552 B CN 114427552B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 77
- 239000003921 oil Substances 0.000 claims abstract description 141
- 239000010729 system oil Substances 0.000 claims abstract description 48
- 230000005641 tunneling Effects 0.000 claims description 39
- 230000001502 supplementing effect Effects 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 239000010720 hydraulic oil Substances 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
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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
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/025—Pressure reducing valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
本发明公开一种盾构管路延伸机构换管液压控制系统，包括驱动齿轮转动的液压马达和控制液压马达进油方向的换向阀，换向阀的进油口和回油口分别连接系统供油和系统回油，换向阀的两个工作油口分别连接液压马达的前进油口和后退油口，系统供油还通过控制阀单独连接液压马达的后退油口，盾构机换管时控制阀关闭，以阻断系统供油由控制阀进入后退油口，盾构机掘进时控制阀打开，以使系统供油经过控制阀进入后退油口。盾构机掘进时，管路延伸机构相对盾构机被动后退，结构简单维护方便，布置紧凑使用不受隧道转弯半径限制，且结构不受管路直径影响，布置不受隧道高度限制。本发明还公开一种包括上述液压控制系统的盾构机。
The present invention discloses a shield machine pipeline extension mechanism pipe replacement hydraulic control system, including a hydraulic motor for driving gear rotation and a reversing valve for controlling the oil inlet direction of the hydraulic motor, the oil inlet and the oil return port of the reversing valve are respectively connected to the system oil supply and the system oil return, the two working oil ports of the reversing valve are respectively connected to the forward oil port and the backward oil port of the hydraulic motor, the system oil supply is also separately connected to the backward oil port of the hydraulic motor through a control valve, when the shield machine pipe is replaced, the control valve is closed to block the system oil supply from entering the backward oil port through the control valve, and when the shield machine is excavating, the control valve is opened to allow the system oil supply to enter the backward oil port through the control valve. When the shield machine is excavating, the pipeline extension mechanism passively retreats relative to the shield machine, the structure is simple and easy to maintain, the layout is compact and is not limited by the tunnel turning radius, and the structure is not affected by the pipeline diameter, and the layout is not limited by the tunnel height. The present invention also discloses a shield machine including the above hydraulic control system.
Description
Technical Field
The invention relates to the field of shield equipment, in particular to a hydraulic control system for pipe replacement of a shield pipeline extension mechanism. In addition, the invention also relates to a shield tunneling machine comprising the hydraulic control system.
Background
The shield machine is widely applied to the field of tunnel excavation, and in recent years, the horizontal hose extension type slurry pipeline extension mechanism of the shield machine is increasingly widely applied by virtue of the advantages of compact structure, no limitation of turning radius of tunnel engineering, convenient and reliable action, simple structure, convenient maintenance and repair and the like. At present, the running gear drive of the horizontal hose extension type slurry pipeline extension mechanism is mainly realized in a gear rack mode, a rack rail is arranged on a main body trailer, a gear is arranged on the running gear, and the pipeline extension mechanism is enabled to advance or retreat on the rack rail through forward rotation and reverse rotation of a drive gear, so that pipeline extension is realized.
When the pipe of the shield machine is replaced, the shield machine is driven forwards for a certain stroke, the pipeline extending mechanism is driven backwards for the same stroke, the pipeline fixed on the pipeline extending mechanism is disconnected from the pipeline in the tunnel, the pipeline extending mechanism walks back to the initial position, namely the front end of the trailer, the pipeline fixed on the pipeline extending mechanism and the pipeline of the tunnel form a gap, and a new pipeline is connected into the gap to realize pipeline extension. If the pipe extending mechanism can not actively advance, a new pipe can not be connected, if the pipe extending mechanism can not actively advance and retreat, the joint clearance and the pipe length are required to be completely equal, the requirements on the tunneling stroke and the pipe length are too high, and the operation of connecting the new pipe is difficult.
When the shield machine is driven, the pipeline fixed on the pipeline extending mechanism is connected with the pipeline fixed on the tunnel to finish slag discharging, and the relative tunnel cannot have any movement trend. However, when the shield machine is driven, the rack track fixed on the trailer moves along with the driving direction, the gear of the traveling device passively rotates, and the whole pipeline extension device generates a movement trend relative to the tunnel. It is easy to see that when the shield tunneling machine is tunneling, the movement trend of the pipeline extending mechanism relative to the tunnel is contradicted with the construction requirement.
Therefore, how to provide a hydraulic control system for changing the pipe of the shield pipeline extension mechanism, which overcomes the above problems, is a technical problem that needs to be solved by those skilled in the art at present.
Disclosure of Invention
The invention aims to provide a hydraulic control system for pipe replacement of a shield pipeline extension mechanism, which realizes the active forward and backward movement of the pipeline extension mechanism by switching the working position of a reversing valve when a shield machine is used for pipe replacement, and enables the pipeline extension mechanism to passively backward relative to the shield machine by supplementing oil to a motor and providing certain back pressure when the shield machine is used for tunneling. The invention further aims to provide a shield tunneling machine comprising the hydraulic control system.
In order to solve the technical problems, the invention provides a pipe changing hydraulic control system of a shield pipeline extension mechanism, which comprises a hydraulic motor for driving a gear to rotate and a reversing valve for controlling the oil inlet direction of the hydraulic motor, wherein an oil inlet and an oil return port of the reversing valve are respectively connected with a system oil supply and a system oil return port, two working oil ports of the reversing valve are respectively connected with a front oil inlet and a back oil outlet of the hydraulic motor, the system oil supply is also independently connected with the back oil outlet of the hydraulic motor through a control valve, the control valve is closed when a shield machine is used for changing a pipe so as to prevent the system oil supply from entering the back oil outlet through the control valve, and the control valve is opened when the shield machine is driven so as to enable the system oil supply to enter the back oil outlet through the control valve.
Preferably, the reversing valve is specifically a three-position four-way electromagnetic reversing valve, and the three-position four-way electromagnetic reversing valve is positioned at a first working position or a second working position when the shield tunneling machine is used for changing a pipe, so that an oil inlet of the three-position four-way electromagnetic reversing valve is communicated with one of two working oil ports, and an oil return port of the three-position four-way electromagnetic reversing valve is communicated with the other one of the two working oil ports.
Preferably, the median function of the three-position four-way electromagnetic directional valve is Y-shaped, the three-position four-way electromagnetic directional valve is in the median position when the shield tunneling machine is in tunneling, and two working oil ports of the three-position four-way electromagnetic directional valve are communicated with an oil return port.
Preferably, a speed regulating valve is arranged between the system oil supply and the reversing valve.
Preferably, an active pressure reducing valve is arranged between the speed regulating valve and the reversing valve.
Preferably, the control valve is specifically an electromagnetic ball valve.
Preferably, a balancing valve is arranged between the reversing valve and the hydraulic motor.
Preferably, an oil supplementing and reducing valve is arranged between the system oil supply and the control valve, the front oil inlet of the hydraulic motor is also connected with the system oil return through an overflow valve, and the opening pressure of the oil supplementing and reducing valve is equal to that of the overflow valve.
Preferably, two oil ports of the overflow valve are respectively and directly connected with a front oil inlet of the hydraulic motor and a working oil port of the reversing valve.
The invention provides a shield tunneling machine, which comprises the hydraulic control system for pipe replacement of the shield pipeline extension mechanism.
The invention provides a pipe changing hydraulic control system of a shield pipeline extension mechanism, which comprises a hydraulic motor for driving a gear to rotate and a reversing valve for controlling the oil inlet direction of the hydraulic motor, wherein an oil inlet and an oil return port of the reversing valve are respectively connected with a system oil supply and a system oil return, two working oil ports of the reversing valve are respectively connected with a front oil inlet and a back oil outlet of the hydraulic motor, the system oil supply is also independently connected with the back oil outlet of the hydraulic motor through a control valve, the control valve is closed when a shield machine is used for changing a pipe so as to prevent the system oil supply from entering the back oil outlet through the control valve, and the control valve is opened when the shield machine is driven so as to enable the system oil supply to enter the back oil outlet through the control valve.
In the working process, when the shield tunneling machine is used for pipe replacement, the control valve is closed, the oil circuit where the control valve is located is isolated from the oil return port of the system oil supply and the hydraulic motor, the system oil supply is connected with the oil inlet of the reversing valve, the system oil supply is blocked from entering the oil return port through the control valve, the system oil return is connected with the oil return port of the reversing valve, the reversing valve enables the front oil inlet of the hydraulic motor to be communicated with the system oil supply through switching the working position, then the hydraulic motor drives the gear to rotate positively, the pipeline extending mechanism actively advances relative to the rack rail of the trailer, or enables the oil return port of the hydraulic motor to be communicated with the system oil supply, and then the hydraulic motor drives the gear to rotate reversely, and the pipeline extending mechanism actively retreats relative to the rack rail of the trailer.
When the shield tunneling machine is tunneling, the reversing valve is at a stop position, the hydraulic motor is not influenced, the control valve is opened, the system oil supply and the backward oil outlet of the hydraulic motor are communicated on an oil way where the control valve is located, the system oil supply enters the backward oil outlet through the control valve, the trailer moves forwards along with the shield tunneling machine, the gear of the pipeline extending mechanism can also passively rotate under the influence of a rack track of the trailer, at the moment, the hydraulic motor can also be driven by the gear to passively rotate, the system oil supply supplements oil to the backward oil outlet of the hydraulic motor, meanwhile, the oil return back pressure is provided through the overflow valve, the pipeline extending mechanism is guaranteed to be stationary relative to a tunnel, and the pipeline extending mechanism passively moves backwards relative to the shield tunneling machine.
The pipeline extending mechanism controlled by the hydraulic control system has the advantages of simple structure, convenient maintenance, compact arrangement, no limitation on the turning radius of a tunnel, no influence on the structure by the diameter of the pipeline, and no limitation on the arrangement height of the tunnel.
The invention also provides a shield tunneling machine comprising the hydraulic control system, and the shield tunneling machine has the same technical effects as the hydraulic control system.
Drawings
FIG. 1 is a hydraulic schematic diagram of an embodiment of a hydraulic control system for pipe replacement of a shield pipeline extension mechanism provided by the invention;
Fig. 2 is a schematic structural diagram of an embodiment of a hydraulic control system for pipe replacement of a shield pipeline extension mechanism provided by the invention.
Detailed Description
The invention aims to provide a hydraulic control system for pipe replacement of a shield pipeline extension mechanism, which realizes the active forward and backward movement of the pipeline extension mechanism by switching the working position of a reversing valve when a shield machine is used for pipe replacement, and enables the pipeline extension mechanism to passively backward relative to the shield machine by supplementing oil to a motor and providing certain back pressure when the shield machine is used for tunneling. The invention further provides a shield tunneling machine comprising the hydraulic control system.
In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Referring to fig. 1 and 2, fig. 1 is a hydraulic schematic diagram of an embodiment of a hydraulic control system for changing a pipe of a shield pipeline extension mechanism provided by the invention, and fig. 2 is a schematic structural diagram of an embodiment of a hydraulic control system for changing a pipe of a shield pipeline extension mechanism provided by the invention.
The invention provides a pipe-changing hydraulic control system of a shield pipeline extending mechanism, which comprises a hydraulic motor 1, a reversing valve and a control valve 3, wherein a gear 9 is driven by the hydraulic motor 1 to rotate so as to control the oil inlet direction of the hydraulic motor 1, an oil inlet and an oil return port of the reversing valve are respectively connected with a system oil supply and a system oil return, two working oil ports of the reversing valve are respectively connected with a front oil inlet A and a rear oil inlet B of the hydraulic motor 1, when the front oil inlet A is used for oil inlet, the rear oil inlet B is used for oil outlet, the gear 9 is driven by the hydraulic motor 1 to rotate positively, the drive pipeline extending mechanism is driven to move forward actively, otherwise, when the rear oil inlet B is used for oil inlet, the front oil inlet A is used for oil outlet, the gear 9 is driven by the hydraulic motor 1 to rotate reversely, and the drive pipeline extending mechanism is driven to move backward actively. The system oil supply is also independently connected with a backward oil port B of the hydraulic motor 1 through a control valve 3, the control valve 3 is closed when the shield machine is in pipe replacement so as to prevent the system oil supply from entering the backward oil port B through the control valve 3, and the control valve 3 is opened when the shield machine is in tunneling so as to enable the system oil supply to enter the backward oil port B through the control valve 3.
In the working process, when the shield tunneling machine is used for pipe replacement, the control valve 3 is closed, the oil supply of the system and the backward oil port B of the hydraulic motor 1 are isolated on an oil way where the control valve 3 is positioned, the oil supply of the system is blocked from entering the backward oil port B through the control valve 3, the oil supply of the system is connected with an oil inlet of the reversing valve, the oil return of the system is connected with an oil return port of the reversing valve, the reversing valve is used for switching a working position, the front oil inlet A of the hydraulic motor 1 is communicated with the oil supply of the system, the hydraulic motor 1 drives the gear 9 to rotate positively, the pipeline extending mechanism actively advances relative to the rack track 10 of the trailer, or the backward oil port B of the hydraulic motor 1 is communicated with the oil supply of the system, the hydraulic motor 1 drives the gear 9 to rotate reversely, and the pipeline extending mechanism actively retreats relative to the rack track 10 of the trailer.
When the shield tunneling machine is tunneling, the reversing valve is at a stop position, the hydraulic motor 1 is not influenced, the control valve 3 is opened, the system oil supply and the backward oil outlet B of the hydraulic motor 1 are communicated on an oil way where the control valve 3 is positioned, the system oil supply enters the backward oil outlet B through the control valve 3, the trailer moves forwards along with the shield tunneling machine, the gear 9 of the pipeline extending mechanism can also passively rotate under the influence of the rack track 10 of the trailer, at the moment, the hydraulic motor 1 can also be driven by the gear 9 to passively rotate, the system oil supply supplements oil to the backward oil outlet B of the hydraulic motor 1, meanwhile, the oil return back pressure is provided through the overflow valve 8, the pipeline extending mechanism is ensured to be stationary relative to a tunnel, and the pipeline extending mechanism passively moves backwards relative to the shield tunneling machine.
When the pipe of the shield machine is replaced, the shield machine is driven forwards for a certain stroke, the pipeline extending mechanism is driven backwards for the same stroke, the pipeline fixed on the pipeline extending mechanism is disconnected from the pipeline in the tunnel, the pipeline extending mechanism walks back to the initial position, namely the front end of the trailer, the pipeline fixed on the pipeline extending mechanism and the pipeline of the tunnel form a gap, and a new pipeline is connected into the gap to realize pipeline extension. If the pipe extending mechanism can not actively advance, a new pipe can not be connected, if the pipe extending mechanism can not actively advance and retreat, the joint clearance and the pipe length are required to be completely equal, the requirements on the tunneling stroke and the pipe length are too high, and the operation of connecting the new pipe is difficult.
When the shield machine is driven, the pipeline fixed on the pipeline extending mechanism is connected with the pipeline fixed on the tunnel to finish slag discharging, and the relative tunnel cannot have any movement trend. However, when the shield machine is driven, the rack track fixed on the trailer moves along with the driving direction, the gear of the traveling device passively rotates, and the whole pipeline extension device generates a movement trend relative to the tunnel. It is easy to see that when the shield tunneling machine is tunneling, the movement trend of the pipeline extending mechanism relative to the tunnel is contradicted with the construction requirement.
The system can lead the pipeline extending mechanism to actively advance and retreat through the cooperation of the valves, thereby realizing the rapid and safe pipeline extension, and also lead the pipeline extending mechanism to passively retreat through the cooperation of the valves, thereby meeting the construction requirement. Furthermore, compared with the traditional mechanism, the pipeline extension mechanism controlled by the hydraulic control system is simple in structure, convenient to maintain, compact in arrangement and use, free of limitation of the turning radius of a tunnel, free of influence of the diameter of the pipeline, and free of limitation of the height of the tunnel.
Specifically, the reversing valve is specifically a three-position four-way electromagnetic reversing valve 2, when the shield tunneling machine is used for pipe replacement, the three-position four-way electromagnetic reversing valve 2 is positioned at a first working position or a second working position, so that an oil inlet of the three-position four-way electromagnetic reversing valve 2 is communicated with one of two working oil ports, an oil return port of the three-position four-way electromagnetic reversing valve 2 is communicated with the other one of the two working oil ports, and further, the system is communicated with a front oil inlet A or a back oil port B of the hydraulic motor 1, the forward and reverse rotation of the hydraulic motor 1 is realized, or the connection mode of the oil ports and the communication partition control mode of the valve are both within the protection scope of the invention.
Further, the middle position function of the three-position four-way electromagnetic directional valve 2 is Y-shaped, the three-position four-way electromagnetic directional valve 2 is in the middle position when the shield tunneling machine is in tunneling, and two working oil ports of the three-position four-way electromagnetic directional valve 2 are communicated with an oil return port, so that the work of the hydraulic motor 1 is not affected.
In the pipe-changing hydraulic control system of the shield pipeline extension mechanism provided by the specific embodiment of the invention, a speed regulating valve 4 is arranged between the system oil supply and the reversing valve, and is used for controlling the flow of hydraulic oil fed by the system oil supply into the hydraulic motor 1 and regulating the rotation speed of the hydraulic motor 1, namely the speed of the pipeline extension mechanism for actively advancing and retreating, or adopting other types of valves with the function of regulating the flow of the hydraulic oil, so that the system oil supply and the reversing valve are all within the protection scope of the invention.
An active pressure reducing valve 5 is arranged between the speed regulating valve 4 and the reversing valve to limit the pressure of the hydraulic motor 1 when the pipeline extending mechanism actively advances and retreats. The control valve 3 is specifically an electromagnetic ball valve, the type and the connection mode of each valve can be adjusted according to the situation, and various schemes with a valve with a switching function can be adopted, and all the schemes are within the protection scope of the invention.
Preferably, a balance valve 6 is further arranged between the reversing valve and the hydraulic motor 1, and comprises two valve groups respectively arranged on two oil paths between the reversing valve and the hydraulic motor 1, each valve group comprises a one-way valve channel and an overflow valve channel, meanwhile, the overflow valve channels of the two valve groups are also connected and controlled mutually, the pressure of a front oil inlet A and a back oil outlet B of the hydraulic motor 1 is locked, the pressure on two sides is limited to be too high, and the balance valve 6 can be replaced by a hydraulic lock.
On the basis of the pipe changing hydraulic control system of the shield pipeline extension mechanism provided by the specific embodiments, an oil supplementing and reducing valve 7 is arranged between the system oil supply and the control valve 3, so that the oil supplementing pressure of the hydraulic motor 1 is limited when the pipeline extension mechanism passively backs up, the front oil inlet A of the hydraulic motor 1 is also connected with the system oil return through an overflow valve 8, the oil return back pressure of the hydraulic motor 1 is limited when the pipeline extension mechanism passively backs up, the opening pressures of the oil supplementing and reducing valve 7 and the overflow valve 8 are equal, and further the absolute static state of the pipeline extension mechanism is ensured, and the pipeline extension mechanism moves backwards relative to a trailer. The opening pressures of the oil supplementing pressure reducing valve 7 and the overflow valve 8 are basically consistent, the phase difference range can be below 1bar, and meanwhile, specific values are related to the delay pressure loss and the local pressure loss, and the opening pressures are within a reasonable range according to actual conditions. Or the backward oil outlet B of the hydraulic motor 1 is basically consistent with the backward oil back pressure of the hydraulic motor 1.
Specifically, two oil ports of the overflow valve 8 are respectively and directly connected with the front oil inlet a of the hydraulic motor 1 and one working oil port of the reversing valve 2. When the shield tunneling machine is tunneling, the control valve 3 is opened, hydraulic oil which is supplied and output by the system sequentially passes through the oil supplementing pressure reducing valve 7 and the control valve 3 to enter the backward oil port B of the hydraulic motor 1, then the hydraulic oil is output by the front oil inlet A and sequentially flows back to the system through the overflow valve 8 and the reversing valve to return oil, the overflow valve 8 is connected with the balance valve 6 in parallel, the hydraulic oil cannot be influenced by the balance valve 6, only the overflow valve 8 flows, and likewise, when the shield tunneling machine is in pipe replacement, the hydraulic oil cannot be influenced by the overflow valve 8, and only the balance valve 6 flows.
In addition to the above-mentioned shield pipeline extension mechanism tube replacement hydraulic control system, the specific embodiment of the invention also provides a shield machine comprising the above-mentioned shield pipeline extension mechanism tube replacement hydraulic control system, and the structure of other parts of the shield machine is referred to the prior art, and will not be described herein.
The pipe changing hydraulic control system of the shield pipeline extension mechanism and the shield machine provided by the invention are described in detail. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (7)
1. The hydraulic control system for the pipe replacement of the shield pipeline extension mechanism is characterized by comprising a hydraulic motor (1) for driving a gear to rotate and a reversing valve for controlling the oil inlet direction of the hydraulic motor (1), wherein an oil inlet and an oil return port of the reversing valve are respectively connected with a system oil supply port and a system oil return port, two working oil ports of the reversing valve are respectively connected with a front oil inlet (A) and a back oil port (B) of the hydraulic motor (1), the system oil supply port is also independently connected with the back oil port (B) of the hydraulic motor (1) through a control valve (3), the control valve (3) is closed when a shield machine is used for pipe replacement, so that the system oil supply is blocked from entering the back oil port (B) through the control valve (3), and the control valve (3) is opened when the shield machine is driven, so that the system oil supply enters the back oil port (B) through the control valve (3);
A balance valve (6) is arranged between the reversing valve and the hydraulic motor (1), the balance valve (6) comprises two valve groups respectively arranged on two oil paths between the reversing valve and the hydraulic motor (1), each valve group comprises a one-way valve channel and an overflow valve channel, and meanwhile, the overflow valve channels of the two valve groups are connected and controlled mutually;
an oil supplementing and reducing valve (7) is arranged between the system oil supply and the control valve (3) and used for limiting the oil supplementing pressure of the hydraulic motor (1) when the shield pipeline extending mechanism is in passive retreating, a front oil inlet (A) of the hydraulic motor (1) is also connected with system oil return through an overflow valve (8) and used for limiting the oil return back pressure of the hydraulic motor (1) when the shield pipeline extending mechanism is in passive retreating, and the opening pressures of the oil supplementing and reducing valve (7) and the overflow valve (8) are equal and used for ensuring that the shield pipeline extending mechanism is in absolute static state and moves backwards relative to a trailer;
two oil ports of the overflow valve (8) are respectively and directly connected with a front oil inlet (A) of the hydraulic motor (1) and a working oil port of the reversing valve, the overflow valve (8) is connected with the balance valve (6) in parallel, and hydraulic oil only flows through the overflow valve (8) when the shield tunneling machine is tunneling.
2. The hydraulic control system for pipe changing of the shield pipeline extension mechanism according to claim 1, wherein the reversing valve is specifically a three-position four-way electromagnetic reversing valve (2), the three-position four-way electromagnetic reversing valve (2) is in a first working position or a second working position when a shield machine is used for pipe changing, so that an oil inlet of the three-position four-way electromagnetic reversing valve (2) is communicated with one of two working oil ports, and an oil return port of the three-position four-way electromagnetic reversing valve (2) is communicated with the other one of the two working oil ports.
3. The hydraulic control system for pipe changing of the shield pipeline extension mechanism according to claim 2, wherein the median function of the three-position four-way electromagnetic directional valve (2) is Y-shaped, the three-position four-way electromagnetic directional valve (2) is in the median position during tunneling of the shield tunneling machine, and two working oil ports of the three-position four-way electromagnetic directional valve (2) are communicated with an oil return port.
4. A shield pipeline extension mechanism tube changing hydraulic control system according to claim 3, characterized in that a speed regulating valve (4) is arranged between the system oil supply and the reversing valve.
5. The hydraulic control system for pipe changing of the shield pipeline extension mechanism according to claim 4, wherein an active pressure reducing valve (5) is arranged between the speed regulating valve (4) and the reversing valve.
6. The shield pipeline extension mechanism pipe changing hydraulic control system according to claim 5, wherein the control valve (3) is specifically an electromagnetic ball valve.
7. A shield tunneling machine comprising the shield piping extension mechanism pipe changing hydraulic control system according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210094374.9A CN114427552B (en) | 2022-01-26 | 2022-01-26 | Shield pipeline extension mechanism pipe replacement hydraulic control system and shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210094374.9A CN114427552B (en) | 2022-01-26 | 2022-01-26 | Shield pipeline extension mechanism pipe replacement hydraulic control system and shield machine |
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| Publication Number | Publication Date |
|---|---|
| CN114427552A CN114427552A (en) | 2022-05-03 |
| CN114427552B true CN114427552B (en) | 2025-01-21 |
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| CN202210094374.9A Active CN114427552B (en) | 2022-01-26 | 2022-01-26 | Shield pipeline extension mechanism pipe replacement hydraulic control system and shield machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209740572U (en) * | 2019-04-19 | 2019-12-06 | 三一汽车制造有限公司 | Hydraulic winch and hydraulic control system thereof |
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| DE4402580B4 (en) * | 1994-01-28 | 2006-12-14 | Linde Ag | Hydraulic drive system |
| CN1300472C (en) * | 2004-06-16 | 2007-02-14 | 浙江大学 | Shielding spiral conveyor hydraulic system with proportional feedback control and accumulator oil supplementary |
| JP2007046368A (en) * | 2005-08-11 | 2007-02-22 | Ishikawajima Harima Heavy Ind Co Ltd | Back bogie of shield machine |
| CN102705288B (en) * | 2012-06-19 | 2015-01-07 | 常德中联重科液压有限公司 | Anti-shaking balance valve, telescopic control loop of hydraulic cylinder and hydraulic device |
| CN103122894B (en) * | 2012-10-26 | 2015-04-15 | 中联重科股份有限公司 | Hydraulic system for controlling boom rotation, its control method, and concrete pumping equipment |
| CN104632729B (en) * | 2015-02-05 | 2017-02-22 | 长安大学 | Rotary drilling rig main winch hydraulic system |
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2022
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| CN209740572U (en) * | 2019-04-19 | 2019-12-06 | 三一汽车制造有限公司 | Hydraulic winch and hydraulic control system thereof |
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| 《泥水平衡盾构机管路延伸装置分析与应用》;熊晨君;《中国高新科技》;20191231(58);55-57 * |
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