Jack shoe hydraulic control system and TBM (Tunnel Boring Machine) adopting same

Abstract

The utility model discloses a gripper shoe hydraulic control system and a TBM (Tunnel Boring Machine) adopting the same, the gripper shoe hydraulic control system can realize the functions of quick extension, quick retraction, high-pressure extension bracing, unloading, gripper shoe locking and the like of a gripper shoe, the function integration degree of the system is high, the system also has the advantages of simple structure and low cost, and in addition, the system can be widely applied to the field of TBMs (Tunnel Boring Machine). The left gripper oil cylinder on-off valve group and the right gripper oil cylinder on-off valve group are respectively arranged on rodless cavity oil ways of the left gripper oil cylinder and the right gripper oil cylinder, so that the independent action of the left gripper oil cylinder and the right gripper oil cylinder can be controlled, the stroke difference of the left gripper oil cylinder and the right gripper oil cylinder is favorably controlled within a required range, the tunneling posture of the TBM can be better controlled, and the tunneling efficiency of the TBM is improved. Therefore, the construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic control technology, and in particular, to a hydraulic control system for a support shoe. In addition, it also relates to a TBM using the above-mentioned hydraulic control system for a support shoe. Background Technology

[0002] Currently, many tunnels are constructed using tunnel boring machines (TBMs) for projects such as subways, highways, railways, and water diversion. During tunneling, the TBM relies on a hydraulic support system to control the support shoe cylinders, providing the TBM with the propulsion reaction force to advance the tunnel. This allows the propulsion cylinders to advance forward. Especially in areas with poor geological conditions requiring full-stroke support of the steel arch, fine-tuning of the support shoe cylinders is necessary to align the TBM with the steel arch trench for step-changing maneuvers. Therefore, the control of the support shoe hydraulic system is crucial for TBM construction. Existing support shoe hydraulic control systems only meet the requirement of simultaneous operation of the left and right support shoe cylinders. For example, Chinese patent application CN111637110A discloses a booster hydraulic system for TBM support shoes, which can simultaneously and rapidly extend and retract the left and right support shoe cylinders, and also achieve high-pressure tightening. However, when significant changes in tunnel excavation posture lead to large differences in the extension stroke of the left and right support shoe cylinders, or when the tunnel is constructed with closely spaced steel arches and the arches are irregular, requiring independent operation of the left and right support shoe cylinders, the existing support shoe hydraulic control system cannot achieve this independent operation. Furthermore, existing support shoe hydraulic control systems generally only enable rapid extension, rapid retraction, and high-pressure tightening of the support shoes; the system has low functional integration and suffers from structural complexity and high cost. Utility Model Content

[0003] This invention provides a hydraulic control system for the support shoe and a TBM using the same system. It improves system integration and allows for independent operation of the left and right support shoe cylinders, which helps reduce the stroke difference between the left and right support shoe cylinders, facilitates control of the TBM's tunneling posture, and improves construction efficiency.

[0004] According to one aspect of this utility model, a hydraulic control system for a support shoe is provided, comprising a first solenoid directional valve, a high-pressure tensioning valve group, a reset control valve group, a support shoe directional valve group, a support shoe locking valve group, a left support shoe cylinder on / off valve group, a right support shoe cylinder on / off valve group, a left support shoe cylinder, and a right support shoe cylinder. The reset control valve group is connected to a first oil source, the high-pressure tensioning valve group, the support shoe directional valve group, and the support shoe locking valve group, respectively, and is used to control the rapid extension and rapid retraction actions of the left and right support shoe cylinders. The high-pressure tensioning valve group is also connected to a second oil source, the first solenoid directional valve, the support shoe directional valve group, and the support shoe locking valve group, respectively, and is used to control the left and right support shoe cylinders. The high-pressure extension of the support shoe cylinder provides support and unloading. The support shoe directional valve assembly is also connected to the third oil source, the support shoe locking valve assembly, the rod chamber of the left support shoe cylinder, and the rod chamber of the right support shoe cylinder, respectively, to control the directional movement of the left and right support shoe cylinders. The support shoe locking valve assembly is also connected to the left and right support shoe cylinder on / off valve assemblies, respectively, to maintain the pressure of the oil in the rodless chambers of the left and right support shoe cylinders. The left support shoe cylinder on / off valve assembly is connected to the rodless chamber of the left support shoe cylinder to control the independent movement of the left support shoe cylinder. The right support shoe cylinder on / off valve assembly is connected to the rodless chamber of the right support shoe cylinder to control the independent movement of the right support shoe cylinder.

[0005] Furthermore, the left support shoe cylinder on / off valve assembly includes a first two-way insert, a first shuttle valve, and a first solenoid ball valve. The first solenoid ball valve is connected to the control oil port of the first shuttle valve and the first two-way insert, respectively. The first shuttle valve is used to provide control oil to the first two-way insert, and the first solenoid ball valve is used to control the opening or closing of the first two-way insert. The first two-way insert is connected to the rodless chamber of the left support shoe cylinder and the support shoe locking valve assembly, respectively, to control the oil flow in the rodless chamber of the left support shoe cylinder.

[0006] Furthermore, the right support shoe cylinder on / off valve assembly includes a second two-way insert, a second shuttle valve, and a second solenoid ball valve. The second solenoid ball valve is connected to the control oil port of the second shuttle valve and the second two-way insert, respectively. The second shuttle valve is used to provide control oil to the second two-way insert, and the second solenoid ball valve is used to control the opening or closing of the second two-way insert. The second two-way insert is connected to the rodless chamber of the right support shoe cylinder and the support shoe locking valve assembly, respectively, to control the oil flow in the rodless chamber of the right support shoe cylinder.

[0007] Furthermore, the reset control valve assembly includes a second solenoid directional valve, a third two-way plug, a fourth two-way plug, a fifth two-way plug, and a sixth two-way plug. The second solenoid directional valve, the third two-way plug, and the fifth two-way plug are all connected to a first oil source. The third two-way plug and the fourth two-way plug are both connected to a support shoe locking valve assembly. The fifth two-way plug and the sixth two-way plug are both connected to a support shoe directional valve assembly. The fourth two-way plug and the sixth two-way plug are also connected to an oil tank. The second solenoid directional valve is connected to the control oil port of the third two-way plug, the fourth two-way plug, the fifth two-way plug, and the sixth two-way plug, and is used to control the reversing action of each two-way plug, thereby controlling the rapid extension and rapid retraction actions of the left support shoe cylinder and the right support shoe cylinder. The second solenoid directional valve is also connected to an oil tank.

[0008] Furthermore, the shoe-mounted directional valve assembly includes a third solenoid directional valve, a fourth solenoid directional valve, a first hydraulically controlled check valve, a second hydraulically controlled check valve, a first check valve, a third hydraulically controlled check valve, and a fourth hydraulically controlled check valve. The third solenoid directional valve is connected to the control ports of the third oil source, the third hydraulically controlled check valve, and the fourth hydraulically controlled check valve, respectively, and is used to control the oil circuits of the third hydraulically controlled check valve and the fourth hydraulically controlled check valve to open in reverse. The fourth solenoid directional valve is connected to the high-pressure tightening valve assembly, the first hydraulically controlled check valve, the second hydraulically controlled check valve, and the third hydraulically controlled check valve. A control check valve is connected to the oil tank and is used to control the reversing action of the left and right support shoe cylinders. The first hydraulic control check valve is connected to the rod chamber of the left support shoe cylinder, the second hydraulic control check valve is connected to the rod chamber of the right support shoe cylinder, the third hydraulic control check valve is connected to the reset control valve group, the rod chamber of the left support shoe cylinder and the first check valve, respectively. The first check valve is also connected to the high-pressure tensioning valve group, and the fourth hydraulic control check valve is connected to the reset control valve group, the rod chamber of the right support shoe cylinder and the first check valve, respectively.

[0009] Furthermore, the support shoe directional valve assembly also includes a first overflow valve and a second overflow valve. The first overflow valve is connected to the rod chamber of the left support shoe cylinder, the reset control valve assembly, and the first check valve, respectively, to prevent the pressure in the rod chamber of the left support shoe cylinder from exceeding the limit. The second overflow valve is connected to the rod chamber of the right support shoe cylinder, the reset control valve assembly, and the first check valve, respectively, to prevent the pressure in the rod chamber of the right support shoe cylinder from exceeding the limit.

[0010] Furthermore, the support shoe locking valve assembly includes a seventh two-way insert, a fifth hydraulically controlled check valve, and a third solenoid ball valve. The fifth hydraulically controlled check valve is connected to the high-pressure tensioning valve assembly, the left support shoe cylinder on / off valve assembly, the right support shoe cylinder on / off valve assembly, and the third solenoid ball valve, respectively, and is used to control the high-pressure extension, tensioning, and unloading of the left and right support shoe cylinders. The third solenoid ball valve is also connected to the control port of the seventh two-way insert, and is used to control the opening or closing of the seventh two-way insert. The seventh two-way insert is connected to the left and right support shoe cylinder on / off valve assemblies, respectively, and is used to control the flow of oil in the rodless chambers of the left and right support shoe cylinders.

[0011] Furthermore, it also includes a first pressure sensor, a second pressure sensor, a third pressure sensor, and a fourth pressure sensor. The first pressure sensor is used to detect the rod chamber pressure of the left support shoe cylinder, the second pressure sensor is used to detect the rodless chamber pressure of the left support shoe cylinder, the third pressure sensor is used to detect the rod chamber pressure of the right support shoe cylinder, and the fourth pressure sensor is used to detect the rodless chamber pressure of the right support shoe cylinder.

[0012] Furthermore, it also includes a first stroke sensor and a second stroke sensor. The first stroke sensor is used to detect the stroke of the left support shoe cylinder, and the second stroke sensor is used to detect the stroke of the right support shoe cylinder.

[0013] In addition, this utility model also provides a TBM that uses the hydraulic control system for the support shoe as described above.

[0014] This utility model has the following beneficial effects:

[0015] This utility model's hydraulic control system for the support shoe can control the rapid extension and retraction of the left and right support shoe cylinders via a reset control valve group. It can control the high-pressure extension, tightening, and unloading of the left and right support shoe cylinders via a first solenoid directional valve and a high-pressure tightening valve group. The system can control the directional movement of the left and right support shoe cylinders via a support shoe directional valve group. Finally, it can lock the support shoes via a support shoe locking valve group. This system enables rapid extension and retraction of the support shoes, high-pressure extension and tightening, unloading, and locking. The system has a high degree of functional integration and also boasts advantages such as simple structure and low cost. Furthermore, by separately installing left and right support shoe cylinder on / off valve groups on the rodless chamber oil circuits of the left and right support shoe cylinders, the individual movement of the left and right support shoe cylinders can be controlled. This helps to control the stroke difference between the left and right support shoe cylinders within the required range, allowing for better control of the TBM's tunneling posture and thus improving construction efficiency.

[0016] In addition, the TBM of this invention also has the above-mentioned advantages.

[0017] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of the hydraulic principle of the hydraulic control system for the support shoe according to a preferred embodiment of this application.

[0020] Explanation of reference numerals in the attached figures

[0021] 1. First solenoid directional valve; 2. High-pressure tensioning valve assembly; 3. Reset control valve assembly; 4. Support shoe directional valve assembly; 5. Support shoe locking valve assembly; 6. Left support shoe cylinder on / off valve assembly; 7. Right support shoe cylinder on / off valve assembly; 8. Left support shoe cylinder; 9. Right support shoe cylinder; 10. First pressure sensor; 11. Second pressure sensor; 12. Third pressure sensor; 13. Fourth pressure sensor; 14. First stroke sensor; 15. Second stroke sensor; 61. First two-way insert; 62. First shuttle valve; 63. First solenoid ball valve; 71. Second two-way insert; 7 2. Second shuttle valve; 73. Second solenoid ball valve; 31. Second solenoid directional valve; 32. Third two-way insert; 33. Fourth two-way insert; 34. Fifth two-way insert; 35. Sixth two-way insert; 41. Third solenoid directional valve; 42. Fourth solenoid directional valve; 43. First hydraulically controlled check valve; 44. Second hydraulically controlled check valve; 45. First check valve; 46. Third hydraulically controlled check valve; 47. Fourth hydraulically controlled check valve; 48. First relief valve; 49. Second relief valve; 51. Seventh two-way insert; 52. Fifth hydraulically controlled check valve; 53. Third solenoid ball valve. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] Reference Figure 1A preferred embodiment of this application provides a hydraulic control system for support shoes, applicable to TBMs, especially open-type TBMs. It includes a first solenoid directional valve 1, a high-pressure tensioning valve group 2, a reset control valve group 3, a support shoe directional valve group 4, a support shoe locking valve group 5, a left support shoe cylinder on / off valve group 6, a right support shoe cylinder on / off valve group 7, a left support shoe cylinder 8, and a right support shoe cylinder 9. The reset control valve group 3 is connected to a first oil source P1, the high-pressure tensioning valve group 2, the support shoe directional valve group 4, and the support shoe locking valve group 5, respectively, and is used to control the rapid extension and retraction actions of the left and right support shoe cylinders 8 and 9. The first oil source P1 is the main oil source, and the switching between rapid extension and retraction actions of the left and right support shoe cylinders 8 and 9 can be achieved through the directional control of the reset control valve group 3. The high-pressure tensioning valve assembly 2 is also connected to the second oil source P2, the first solenoid directional valve 1, the support shoe directional valve assembly 4, and the support shoe locking valve assembly 5, respectively, for controlling the high-pressure extension tensioning and unloading of the left support shoe cylinder 8 and the right support shoe cylinder 9. The second oil source P2 is an auxiliary oil source; the switching between high-pressure extension tensioning and unloading of the left support shoe cylinder 8 and the right support shoe cylinder 9 can be achieved through the switching control of the first solenoid directional valve 1. The support shoe directional valve assembly 4 is also connected to the third oil source P3, the support shoe locking valve assembly 5, and the rod chambers of the left and right support shoe cylinders, respectively, for controlling the directional movement of the left and right support shoe cylinders. The third oil source P3 is a control oil source; the directional control of the support shoe directional valve assembly 4 can adjust the pressure in the rod chamber of either the left or right support shoe cylinder 8, thereby controlling the directional movement of the left and right support shoe cylinders. The support shoe locking valve assembly 5 is also connected to the left support shoe cylinder on / off valve assembly 6 and the right support shoe cylinder on / off valve assembly 7, respectively, for maintaining pressure on the rodless chamber oil of the left support shoe cylinder 8 and the right support shoe cylinder 9. The pressure maintenance of the rodless chamber oil of the left support shoe cylinder 8 and the right support shoe cylinder 9 can be achieved by controlling the reversing of the support shoe locking valve assembly 5, thereby realizing support shoe locking. The left support shoe cylinder on / off valve assembly 6 is connected to the rodless chamber of the left support shoe cylinder 8 and is used to control the independent action of the left support shoe cylinder 8. The right support shoe cylinder on / off valve assembly 7 is connected to the rodless chamber of the right support shoe cylinder 9 and is used to control the independent action of the right support shoe cylinder 9. When it is necessary to control the left support shoe cylinder 8 to act independently, the left support shoe cylinder on / off valve assembly 6 is opened and the right support shoe cylinder on / off valve assembly 7 is closed. When it is necessary to control the right support shoe cylinder 9 to act independently, the left support shoe cylinder on / off valve assembly 6 is closed and the right support shoe cylinder on / off valve assembly 7 is opened, thereby realizing the independent control of the left support shoe cylinder 8 and the right support shoe cylinder 9.

[0024] It is understood that the hydraulic control system for the support shoe in this embodiment can control the rapid extension and retraction of the left support shoe cylinder 8 and the right support shoe cylinder 9 through the reset control valve group 3; it can control the high-pressure extension, tightening, and unloading of the left support shoe cylinder 8 and the right support shoe cylinder 9 through the first solenoid reversing valve 1 and the high-pressure tightening valve group 2; it can control the directional movement of the left support shoe cylinder 8 and the right support shoe cylinder 9 through the support shoe directional valve group 4; and it can lock the support shoe through the support shoe locking valve group 5. It can realize the functions of rapid extension, rapid retraction, high-pressure extension and tightening, unloading, and support shoe locking. The system has a high degree of functional integration and also has the advantages of simple structure and low cost. Furthermore, by setting the left support shoe cylinder on / off valve group 6 and the right support shoe cylinder on / off valve group 7 respectively in the rodless chamber oil circuit of the left support shoe cylinder 8 and the right support shoe cylinder 9, the individual actions of the left support shoe cylinder 8 and the right support shoe cylinder 9 can be controlled. This helps to control the stroke difference between the left and right support shoe cylinders within the required range, and can better control the tunneling posture of the TBM, thereby improving construction efficiency.

[0025] It is understood that the hydraulic oil supplied by the second oil source P2 enters the high-pressure tensioning valve group 2 through the AP0 port, and then splits into two paths. One path is delivered to the shoe directional valve group 4 through the AP2 port, and the other path is delivered to the P port of the first solenoid directional valve 1 through the AP1 port. The A port of the first solenoid directional valve 1 is connected to the AA1 port of the high-pressure tensioning valve group 2. The AA1 port is connected to the BA1 port. The B port of the first solenoid directional valve 1 is connected to the AB1 port of the high-pressure tensioning valve group 2. The AB1 port is connected to the BB1 ​​port. Both the BA1 port and the BB1 ​​port are connected to the shoe locking valve group 5. The T port of the first solenoid directional valve 1 is connected to the AT1 port of the high-pressure tensioning valve group 2. The AT1 port is connected to the BT1 port. The BT1 port is connected to the oil tank.

[0026] The reset control valve assembly 3 includes a second solenoid directional valve 31, a third two-way valve insert 32, a fourth two-way valve insert 33, a fifth two-way valve insert 34, and a sixth two-way valve insert 35. The P port of the second solenoid directional valve 31, and the A ports of the third two-way valve insert 32 and the fifth two-way valve insert 34 are all connected to a first oil source. The B ports of the third two-way valve insert 32 and the fourth two-way valve insert 33 are both connected to the shoe locking valve assembly 5 via the FA1 port. The B ports of the fifth two-way valve insert 34 and the sixth two-way valve insert 35 are both connected to the shoe adjusting valve assembly 4 via the FB1 port. Furthermore, the A ports of the fourth two-way plug 33 and the sixth two-way plug 35 are also connected to the oil tank via the BT0 port. The A port of the second electromagnetic reversing valve 31 is connected to the control oil ports of the third two-way plug 32 and the sixth two-way plug 35, and the B port of the second electromagnetic reversing valve 31 is connected to the control oil ports of the fourth two-way plug 33 and the fifth two-way plug 34. These are used to control the reversing action of each two-way plug, thereby controlling the rapid extension and retraction actions of the left support shoe cylinder 8 and the right support shoe cylinder 9. The second electromagnetic reversing valve 31 is also connected to the oil tank. When the TCV003 of the second solenoid directional valve 31 is energized, the second solenoid directional valve 31 switches to the left position, and the oil enters the control oil ports of the fourth two-way plug 33 and the fifth two-way plug 34, controlling the fourth two-way plug 33 and the fifth two-way plug 34 to close, while the third two-way plug 32 and the sixth two-way plug 35 open. The pressure oil of the main oil circuit is delivered to the rodless chamber of the left support shoe cylinder 8 and the right support shoe cylinder 9 through the third two-way plug 32, the CA2 port and the FA1 port, driving the left support shoe cylinder 8 and the right support shoe cylinder 9 to extend rapidly at the same time. When the TCV004 of the second solenoid directional valve 31 is energized, the second solenoid directional valve 31 switches to the right position, and the oil enters the control oil ports of the third two-way plug 32 and the sixth two-way plug 35, controlling the third two-way plug 32 and the sixth two-way plug 35 to close, while the fourth two-way plug 33 and the fifth two-way plug 34 open. The pressure oil of the main oil circuit is delivered to the rod chamber of the left support shoe cylinder 8 and the right support shoe cylinder 9 through the fifth two-way plug 34, port CB3 and port FB1, driving the left support shoe cylinder 8 and the right support shoe cylinder 9 to retract rapidly at the same time.

[0027] Additionally, the support shoe directional valve assembly 4 includes a third solenoid directional valve 41, a fourth solenoid directional valve 42, a first hydraulically controlled check valve 43, a second hydraulically controlled check valve 44, a first check valve 45, a third hydraulically controlled check valve 46, and a fourth hydraulically controlled check valve 47. The third solenoid directional valve 41 is connected to the control ports of the third oil source P3, the third hydraulically controlled check valve 46, and the fourth hydraulically controlled check valve 47, respectively, and is used to control the reverse opening of the oil circuits of the third hydraulically controlled check valve 46 and the fourth hydraulically controlled check valve 47. The fourth solenoid directional valve 42 is connected to the AP2 port of the high-pressure tensioning valve assembly 2, the first hydraulically controlled check valve 43, the second hydraulically controlled check valve 44, and the oil tank, respectively, and is used to control the directional movement of the left support shoe cylinder 8 and the right support shoe cylinder 9. The first hydraulic check valve 43 is connected to the rod chamber of the left support shoe cylinder 8, the second hydraulic check valve 44 is connected to the rod chamber of the right support shoe cylinder 9, the third hydraulic check valve 46 is connected to the FB1 port of the reset control valve group 3, the rod chamber of the left support shoe cylinder 8 and the first check valve 45 respectively, the first check valve 45 is also connected to the BB1 ​​port of the high pressure tightening valve group 2, and the fourth hydraulic check valve 47 is connected to the FB1 port of the reset control valve group 3, the rod chamber of the right support shoe cylinder 9 and the first check valve 45 respectively. When the TCV031 of the third solenoid directional valve 41 is energized, the third solenoid directional valve 41 switches to the active position, and the control oil is delivered through the B port of the third solenoid directional valve 41 to the control oil port of the third hydraulic control check valve 46 and the fourth hydraulic control check valve 47, thereby controlling the reverse oil circuit of the third hydraulic control check valve 46 and the fourth hydraulic control check valve 47 to realize the return oil in the rod chamber of the left support shoe cylinder 8 and the right support shoe cylinder 9.

[0028] Optionally, the support shoe directional valve group 4 further includes a first overflow valve 48 and a second overflow valve 49. The first overflow valve 48 is connected to the rod chamber of the left support shoe cylinder 8, the reset control valve group 3, and the first check valve 45, respectively, to prevent the pressure in the rod chamber of the left support shoe cylinder 8 from exceeding the limit. The second overflow valve 49 is connected to the rod chamber of the right support shoe cylinder 9, the reset control valve group 3, and the first check valve 45, respectively, to prevent the pressure in the rod chamber of the right support shoe cylinder 9 from exceeding the limit.

[0029] Additionally, the support shoe locking valve assembly 5 includes a seventh two-way insert 51, a fifth hydraulically controlled check valve 52, and a third solenoid ball valve 53. The fifth hydraulically controlled check valve 52 is connected to the AA1 port of the high-pressure tensioning valve assembly 2, the left support shoe cylinder on / off valve assembly 6, the right support shoe cylinder on / off valve assembly 7, and the third solenoid ball valve 53. The control port of the fifth hydraulically controlled check valve 52 is connected to the AB1 port of the high-pressure tensioning valve assembly 2, used to control the high-pressure extension, tensioning, and unloading of the left support shoe cylinder 8 and the right support shoe cylinder 9. The third solenoid ball valve 53 is also connected to the control port of the seventh two-way insert 51, used to control the opening or closing of the seventh two-way insert 51. The seventh two-way insert 51 is connected to the left support shoe cylinder on / off valve assembly 6 and the right support shoe cylinder on / off valve assembly 7, used to control the flow of oil in the rodless chambers of the left support shoe cylinder 8 and the right support shoe cylinder 9.

[0030] In addition, the left support shoe cylinder on / off valve group 6 includes a first two-way insert 61, a first shuttle valve 62, and a first solenoid ball valve 63. The first solenoid ball valve 63 is connected to the control oil port of the first shuttle valve 62 and the first two-way insert 61 respectively. The first shuttle valve 62 is used to provide control oil to the first two-way insert 61. The first solenoid ball valve 63 is used to control the opening or closing of the first two-way insert 61. The first two-way insert 61 is connected to the rodless chamber of the left support shoe cylinder 8 and the support shoe locking valve group 5 respectively, and is used to control the oil flow in the rodless chamber of the left support shoe cylinder 8. The right support shoe cylinder on / off valve assembly 7 includes a second two-way insert 71, a second shuttle valve 72, and a second solenoid ball valve 73. The second solenoid ball valve 73 is connected to the control oil ports of the second shuttle valve 72 and the second two-way insert 71, respectively. The second shuttle valve 72 is used to provide control oil to the second two-way insert 71, and the second solenoid ball valve 73 is used to control the opening or closing of the second two-way insert 71. The second two-way insert 71 is connected to the rodless chamber of the right support shoe cylinder 9 and the support shoe locking valve assembly 5, respectively, and is used to control the oil flow in the rodless chamber of the right support shoe cylinder 9.

[0031] It can be understood that the extension action principle of the left support shoe cylinder 8 and the right support shoe cylinder 9 is as follows: When the high-pressure hydraulic oil supplied by the first oil source P1 flows into the valve group through the BP0 oil port of the reset control valve group 3, it is divided into two paths, flowing into the control oil circuit of CP0 and the main channel oil circuit of CP2 inside the valve group, respectively. When the TCV003 signal of the second solenoid directional valve 31 is energized, the left position oil circuit of the second solenoid directional valve 31 is opened, and the high-pressure control oil entering CP0 flows into CP1 and then into CB1 through the second solenoid directional valve 31 to control the fourth two-way plug 33 and the fifth two-way plug 34 to close; at the same time, the low-pressure control oil of the third two-way plug 32 and the sixth two-way plug 35 flows from the CA1 port through the second solenoid directional valve 31 into the CT1 port, then into the CL1 oil passage and then into the FL1 port, then through the UL0 port and into the UL1 oil passage before returning to the oil tank. At this time, the third two-way plug 32 and the sixth two-way plug 35 are opened. The main oil entering the CP2 oil circuit flows into the CA2 oil passage through the third two-way insert 32 and then into the FA1 oil port. The low-pressure return oil flows into the CB3 oil passage through the FB1 port, and then returns to the oil tank through the sixth two-way insert 35, the CT3 oil passage of the reset control valve group 3, and the BT0 port. When the TCV021 signal of the third solenoid ball valve 53 is energized, the third solenoid ball valve 53 is in the left position, and the oil passage of the seventh two-way insert 51 is opened. At this time, the high-pressure oil flowing into the FA1 port flows into the HA1 and HA2 oil ports through the HP0 oil port of the support shoe locking valve group 5 and the seventh two-way insert 51. High-pressure hydraulic oil from port HA1 flows into port SP1 of the left support shoe cylinder on / off valve group 6. When the TCV031 of the first solenoid ball valve 63 is energized, the valve core moves to the left position, controlling the first two-way insert 61 to open. The high-pressure hydraulic oil from port SP1 flows into port SA1 through the first two-way insert 61. The high-pressure hydraulic oil from port SA1 flows into port YA1 of the rodless chamber of the left support shoe cylinder 8. At the same time, high-pressure hydraulic oil from port HA2 flows into port SP2 of the right support shoe cylinder on / off valve group 7. When the TCV032 of the second solenoid ball valve 73 is energized, the valve core moves to the left position, controlling the second two-way insert 71 to open. The high-pressure hydraulic oil from port SP2 flows into port SA2 through the second two-way insert 71. The high-pressure hydraulic oil from port SA2 flows into port YA2 of the rodless chamber of the right support shoe cylinder 9. Low-pressure oil in the rod chamber of the left support shoe cylinder 8 flows into the UB1 port of the support shoe directional valve group 4 through YB1. When the control oil supplied by the third oil source P3 flows into the UP3 port of the support shoe directional valve group 4, and the third solenoid directional valve 41 is energized, the valve core of the third solenoid directional valve 41 is in the left position. At this time, the oil in UP3 flows into UP1 and then into UB1 through the third solenoid directional valve 41, causing the third hydraulic control check valve 46 and the fourth hydraulic control check valve 47 to open in reverse. The low-pressure oil in the low-pressure return oil circuit UB1 flows into the UB0 port through the third hydraulic control check valve 46, and then flows into FB1 and CB3 through the CT3 port of the sixth two-way insert 35 and returns to the oil tank through BT0. At this time, the left support shoe cylinder 8 performs a rapid extension action.Similarly, the low-pressure oil in the rod chamber of the right support shoe cylinder 9 flows into the UB2 port of the support shoe directional valve group 4 through YB2. The low-pressure oil in the low-pressure return main oil circuit UB2 flows into UB0 through the fourth hydraulic control check valve 47, and then flows into FB1 and CB3 through UB0 and returns to the oil tank through the CT3 port of the sixth two-way plug 35 via BT0. At this time, the right support shoe cylinder 9 performs a rapid extension action.

[0032] Furthermore, the retraction principle of the left support shoe cylinder 8 and the right support shoe cylinder 9 is as follows: When the TCV004 signal of the second solenoid directional valve 31 is energized, the right position oil circuit of the second solenoid directional valve 31 is opened. The high-pressure control oil entering CP0 flows into CP1, passes through the second solenoid directional valve 31, and then flows into CA1 to control the closing of the third two-way plug 32 and the sixth two-way plug 35. At the same time, the low-pressure control oil of the fourth two-way plug 33 and the fifth two-way plug 34 flows from CB1 through the second solenoid directional valve 31 into CT1, then into the CL1 oil passage, then into FL1, then through UL0, then into the UL1 oil passage, and then back to the oil tank. At this time, the fourth two-way plug 33 and the fifth two-way plug 34 are opened. The main oil circuit oil entering the CP3 oil circuit flows through the fifth two-way plug 34 into the CB3 oil passage and then into the FB1 oil port. The low-pressure return oil flows from FA1 into CA2, passes through the fourth two-way plug 33, and returns to the oil tank via the BT0 of the reset control valve group 3. The high-pressure hydraulic fluid flowing into the main oil circuit from the FB1 port of the reset directional valve group 3 is divided into two paths via the UB0 port of the support shoe directional valve group 4. One path flows through the third hydraulic control check valve 46, through the UB1 port, into the YB1 port of the rod chamber of the left support shoe cylinder 8. The other path flows through the fourth hydraulic control check valve 47, through the UB2 port, into the YB2 port of the rod chamber of the right support shoe cylinder 9. The low-pressure hydraulic fluid in the rodless chamber of the left support shoe cylinder 8 flows through the YA1 port into the SA1 port of the left support shoe cylinder on / off valve group 6. When the TCV031 of the first solenoid ball valve 63 is energized, the valve core moves to the left position, controlling the opening of the first two-way insert 61. The low-pressure hydraulic fluid in the SA1 oil passage flows through the first two-way insert 61 into the SP1 port. The low-pressure hydraulic fluid in the SP1 port flows into the HA1 port of the support shoe locking valve group 5. When the TCV021 signal of the third solenoid ball valve 53 is energized, the third solenoid ball valve 53 is in the left position, controlling the oil passage of the seventh two-way insert 51 to open. At this time, the low-pressure oil flowing into HA1 flows into the HP0 oil port through the seventh two-way insert 51 of the support shoe locking valve group 5. The low-pressure oil in the rodless chamber of the right support shoe cylinder 9 flows into the SA2 oil port of the right support shoe cylinder on / off valve group 7 through YA2. When the TCV032 of the second solenoid ball valve 73 is energized, the valve core moves to the left position, controlling the second two-way insert 71 to open. The low-pressure oil in the SA2 oil passage flows into the SP2 oil port through the second two-way insert 71. The low-pressure oil in the SP2 oil port flows into the HA2 oil port of the support shoe locking valve group 5. When the TCV021 signal of the third solenoid ball valve 53 is energized, the third solenoid ball valve 53 is in the left position, controlling the oil passage of the seventh two-way insert 51 to open. At this time, the low-pressure oil flowing into HA2 flows into the HP0 oil port through the seventh two-way insert 51. The low-pressure return oil flowing into HP0 flows into the FA1 oil port of the reset valve group 3 and into the CA2 oil passage, then flows into the CT2 oil passage through the fourth two-way insert 33 and returns to the oil tank via BT0. At this time, the left support shoe cylinder 8 and the right support shoe cylinder 9 simultaneously perform a rapid retraction action.

[0033] In addition, the working principle of high-pressure extension, tensioning and unloading of the left support shoe cylinder 8 and the right support shoe cylinder 9 is as follows: When the TCV001 of the first solenoid directional valve 1 is energized, the first solenoid directional valve 1 switches to the left position, and the hydraulic oil is delivered through the B port of the first solenoid directional valve 1 and the AB1 port of the high-pressure tensioning valve group 2 to the control oil port of the fifth hydraulic control check valve 52 of the support shoe locking valve group 5, thereby controlling the reverse oil circuit of the fifth hydraulic control check valve 52 to be opened, thereby realizing the unloading of the left support shoe cylinder 8 and the right support shoe cylinder 9. When the TCV002 of the first solenoid directional valve 1 is energized, the first solenoid directional valve 1 switches to the right position. The hydraulic oil is delivered through port A of the first solenoid directional valve 1 and port AA1 of the high-pressure tensioning valve group 2 to the fifth hydraulic control check valve 52 of the support shoe locking valve group 5, and then delivered to the rodless chambers of the left support shoe cylinder 8 and the right support shoe cylinder 9, increasing the oil supply pressure of the rodless chamber, thereby realizing the high-pressure extension and tensioning of the left support shoe cylinder 8 and the right support shoe cylinder 9.

[0034] Furthermore, the working principle of the left support shoe cylinder 8 and the right support shoe cylinder 9 reversing direction is as follows: During the process of controlling the extension of the left support shoe cylinder 8 and the right support shoe cylinder 9, when the TCV005 of the fourth solenoid directional valve 42 is energized, the fourth solenoid directional valve 42 switches to the left position. The pressure oil provided by the second oil source P2 is delivered to the return oil circuit of the rod chamber of the right support shoe cylinder 9 through the second hydraulic control check valve 44, thereby increasing the return oil back pressure of the rod chamber of the right support shoe cylinder 9, so that the left support shoe cylinder... The extension strokes of the left support shoe cylinder 8 and the right support shoe cylinder 9 are different to achieve the reversing action; when the TCV006 of the fourth solenoid directional valve 42 is energized, the fourth solenoid directional valve 42 switches to the right position, and the pressure oil provided by the second oil source P2 is delivered to the return oil circuit of the rod chamber of the left support shoe cylinder 8 through the second hydraulic control check valve 44, thereby increasing the return oil back pressure of the rod chamber of the left support shoe cylinder 8, so that the extension strokes of the left support shoe cylinder 8 and the right support shoe cylinder 9 are different to achieve the reversing action.

[0035] In addition, the working principle of the left support shoe cylinder 8 and the right support shoe cylinder 9 for locking is as follows: when the left support shoe cylinder 8 and the right support shoe cylinder 9 are extended to their positions, the third solenoid ball valve 53 is de-energized, thereby controlling the seventh two-way insert 51 to close. At the same time, the reverse oil circuit of the fifth hydraulic check valve 52 is not connected, thereby maintaining the oil pressure in the rodless chamber of the left support shoe cylinder 8 and the right support shoe cylinder 9, and realizing the support shoe locking function.

[0036] Furthermore, the working principle of the independent operation of the left support shoe cylinder 8 and the right support shoe cylinder 9 is as follows: When the first solenoid ball valve 63 is de-energized, the first two-way plug 61 is closed, and at the same time, the second solenoid ball valve 73 is energized, causing the second two-way plug 71 to conduct. At this time, the oil circuit of the rodless chamber of the left support shoe cylinder 8 is disconnected, and the oil circuit of the rodless chamber of the right support shoe cylinder 9 is conducted, thereby realizing the independent operation of the right support shoe cylinder 9. When the first solenoid ball valve 63 is energized, the first two-way plug 61 is opened, and at the same time, the second solenoid ball valve 73 is de-energized, causing the second two-way plug 71 to close. At this time, the oil circuit of the rodless chamber of the left support shoe cylinder 8 is conducted, and the oil circuit of the rodless chamber of the right support shoe cylinder 9 is disconnected, thereby realizing the independent operation of the left support shoe cylinder 8.

[0037] Optionally, the hydraulic control system for the support shoe further includes a first pressure sensor 10, a second pressure sensor 11, a third pressure sensor 12, and a fourth pressure sensor 13. The first pressure sensor 10 detects the pressure in the rod chamber of the left support shoe cylinder 8, the second pressure sensor 11 detects the pressure in the rodless chamber of the left support shoe cylinder 8, the third pressure sensor 12 detects the pressure in the rod chamber of the right support shoe cylinder 9, and the fourth pressure sensor 13 detects the pressure in the rodless chamber of the right support shoe cylinder 9. Additionally, the hydraulic control system for the support shoe further includes a first stroke sensor 14 and a second stroke sensor 15. The first stroke sensor 14 detects the stroke of the left support shoe cylinder 8, and the second stroke sensor 15 detects the stroke of the right support shoe cylinder 9. Furthermore, the hydraulic control system for the support shoe further includes a remote control for controlling the individual movements of the left and right support shoe cylinders 8 and 9 on-site, facilitating on-site adjustment of the support shoe cylinder movements and avoiding information transmission delays and operational inconvenience caused by operations in the main control room. For example, when the stroke difference between the left support shoe cylinder 8 and the right support shoe cylinder 9 meets a preset condition, and the rod-side and rodless-side pressures of both cylinders also meet preset conditions, then the left support shoe cylinder 8 and the right support shoe cylinder 9 can be controlled individually by a remote control to perform their respective actions. Of course, in other embodiments, permission conditions and emergency stop conditions can also be considered as necessary conditions for on-site control using a remote control. The specific condition settings are prior art and will not be elaborated upon here.

[0038] In addition, another embodiment of this utility model provides a TBM, preferably employing the hydraulic control system for the support shoe as described above. The TBM is preferably an open-type TBM.

[0039] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0040] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hydraulic control system for a boot support, characterized in that, The system includes a first solenoid directional valve (1), a high-pressure tensioning valve group (2), a reset control valve group (3), a support shoe directional valve group (4), a support shoe locking valve group (5), a left support shoe cylinder on / off valve group (6), a right support shoe cylinder on / off valve group (7), a left support shoe cylinder (8), and a right support shoe cylinder (9). The reset control valve group (3) is connected to the first oil source, the high-pressure tensioning valve group (2), the support shoe directional valve group (4), and the support shoe locking valve group (5) respectively, and is used to control the rapid extension and rapid retraction of the left support shoe cylinder (8) and the right support shoe cylinder (9). The high-pressure tensioning valve group (2) is also connected to the second oil source, the first solenoid directional valve (1), the support shoe directional valve group (4), and the support shoe locking valve group (5) respectively, and is used to control the high-pressure extension of the left support shoe cylinder (8) and the right support shoe cylinder (9). In addition to tightening and unloading, the support shoe directional valve group (4) is also connected to the third oil source, the support shoe locking valve group (5), the rod chamber of the left support shoe cylinder (8), and the rod chamber of the right support shoe cylinder (9), respectively, to control the directional action of the left support shoe cylinder (8) and the right support shoe cylinder (9). The support shoe locking valve group (5) is also connected to the left support shoe cylinder on / off valve group (6) and the right support shoe cylinder on / off valve group (7), respectively, to maintain the pressure of the oil in the rodless chamber of the left support shoe cylinder (8) and the right support shoe cylinder (9). The left support shoe cylinder on / off valve group (6) is connected to the rodless chamber of the left support shoe cylinder (8), to control the individual action of the left support shoe cylinder (8). The right support shoe cylinder on / off valve group (7) is connected to the rodless chamber of the right support shoe cylinder (9), to control the individual action of the right support shoe cylinder (9).

2. The hydraulic control system for the support shoe as described in claim 1, characterized in that, The left support shoe cylinder on / off valve group (6) includes a first two-way insert (61), a first shuttle valve (62) and a first solenoid ball valve (63). The first solenoid ball valve (63) is connected to the control oil port of the first shuttle valve (62) and the first two-way insert (61) respectively. The first shuttle valve (62) is used to provide control oil to the first two-way insert (61). The first solenoid ball valve (63) is used to control the opening or closing of the first two-way insert (61). The first two-way insert (61) is connected to the rodless chamber of the left support shoe cylinder (8) and the support shoe locking valve group (5) respectively, and is used to control the oil flow in the rodless chamber of the left support shoe cylinder (8).

3. The hydraulic control system for the support shoe as described in claim 1, characterized in that, The right support shoe cylinder on / off valve group (7) includes a second two-way insert (71), a second shuttle valve (72), and a second solenoid ball valve (73). The second solenoid ball valve (73) is connected to the control oil port of the second shuttle valve (72) and the second two-way insert (71), respectively. The second shuttle valve (72) is used to provide control oil to the second two-way insert (71). The second solenoid ball valve (73) is used to control the opening or closing of the second two-way insert (71). The second two-way insert (71) is connected to the rodless chamber of the right support shoe cylinder (9) and the support shoe locking valve group (5), respectively, and is used to control the oil flow in the rodless chamber of the right support shoe cylinder (9).

4. The hydraulic control system for the support shoe as described in claim 1, characterized in that, The reset control valve assembly (3) includes a second solenoid directional valve (31), a third two-way valve insert (32), a fourth two-way valve insert (33), a fifth two-way valve insert (34), and a sixth two-way valve insert (35). The second solenoid directional valve (31), the third two-way valve insert (32), and the fifth two-way valve insert (34) are all connected to the first oil source. The third two-way valve insert (32) and the fourth two-way valve insert (33) are both connected to the support shoe locking valve assembly (5). The fifth two-way valve insert (34) and the sixth two-way valve insert (35) are both connected to the support shoe adjusting valve assembly (5). The valve assembly (4) is connected to the valve group. The fourth two-way plug (33) and the sixth two-way plug (35) are also connected to the oil tank. The second electromagnetic reversing valve (31) is connected to the control oil port of the third two-way plug (32), the fourth two-way plug (33), the fifth two-way plug (34) and the sixth two-way plug (35) to control the reversing action of each two-way plug, thereby controlling the rapid extension and rapid retraction action of the left support shoe cylinder (8) and the right support shoe cylinder (9). The second electromagnetic reversing valve (31) is also connected to the oil tank.

5. The hydraulic control system for the support shoe as described in claim 1, characterized in that, The shoe-support directional valve assembly (4) includes a third solenoid directional valve (41), a fourth solenoid directional valve (42), a first hydraulically controlled check valve (43), a second hydraulically controlled check valve (44), a first check valve (45), a third hydraulically controlled check valve (46), and a fourth hydraulically controlled check valve (47). The third solenoid directional valve (41) is connected to the control ports of the third oil source, the third hydraulically controlled check valve (46), and the fourth hydraulically controlled check valve (47) respectively, and is used to control the oil circuits of the third hydraulically controlled check valve (46) and the fourth hydraulically controlled check valve (47) to open in reverse. The fourth solenoid directional valve (42) is connected to the high-pressure support valve assembly (2), the first hydraulically controlled check valve (43), the second hydraulically controlled check valve (44), the first hydraulically controlled check valve (45), the third hydraulically controlled check valve (46), and the fourth hydraulically controlled check valve (47) respectively. A check valve (44) is connected to the oil tank and is used to control the reversing action of the left support shoe cylinder (8) and the right support shoe cylinder (9). The first hydraulic check valve (43) is connected to the rod chamber of the left support shoe cylinder (8). The second hydraulic check valve (44) is connected to the rod chamber of the right support shoe cylinder (9). The third hydraulic check valve (46) is connected to the reset control valve group (3), the rod chamber of the left support shoe cylinder (8), and the first check valve (45) respectively. The first check valve (45) is also connected to the high pressure tightening valve group (2). The fourth hydraulic check valve (47) is connected to the reset control valve group (3), the rod chamber of the right support shoe cylinder (9), and the first check valve (45) respectively.

6. The hydraulic control system for the support shoe as described in claim 5, characterized in that, The support shoe directional valve group (4) further includes a first overflow valve (48) and a second overflow valve (49). The first overflow valve (48) is connected to the rod chamber of the left support shoe cylinder (8), the reset control valve group (3), and the first check valve (45) respectively, and is used to prevent the pressure of the rod chamber of the left support shoe cylinder (8) from exceeding the limit. The second overflow valve (49) is connected to the rod chamber of the right support shoe cylinder (9), the reset control valve group (3), and the first check valve (45) respectively, and is used to prevent the pressure of the rod chamber of the right support shoe cylinder (9) from exceeding the limit.

7. The hydraulic control system for the support shoe as described in claim 1, characterized in that, The support shoe locking valve group (5) includes a seventh two-way plug (51), a fifth hydraulic control check valve (52) and a third solenoid ball valve (53). The fifth hydraulic control check valve (52) is connected to the high-pressure tensioning valve group (2), the left support shoe cylinder on / off valve group (6), the right support shoe cylinder on / off valve group (7) and the third solenoid ball valve (53) respectively, and is used to control the high-pressure extension tensioning and unloading of the left support shoe cylinder (8) and the right support shoe cylinder (9). The third solenoid ball valve (53) is also connected to the control port of the seventh two-way plug (51) and is used to control the opening or closing of the seventh two-way plug (51). The seventh two-way plug (51) is connected to the left support shoe cylinder on / off valve group (6) and the right support shoe cylinder on / off valve group (7) respectively, and is used to control the flow of oil in the rodless chamber of the left support shoe cylinder (8) and the right support shoe cylinder (9).

8. The hydraulic control system for the support shoe as described in claim 1, characterized in that, It also includes a first pressure sensor (10), a second pressure sensor (11), a third pressure sensor (12) and a fourth pressure sensor (13). The first pressure sensor (10) is used to detect the rod chamber pressure of the left support shoe cylinder (8), the second pressure sensor (11) is used to detect the rodless chamber pressure of the left support shoe cylinder (8), the third pressure sensor (12) is used to detect the rod chamber pressure of the right support shoe cylinder (9), and the fourth pressure sensor (13) is used to detect the rodless chamber pressure of the right support shoe cylinder (9).

9. The hydraulic control system for the support shoe as described in claim 1, characterized in that, It also includes a first stroke sensor (14) and a second stroke sensor (15). The first stroke sensor (14) is used to detect the stroke of the left support shoe cylinder (8), and the second stroke sensor (15) is used to detect the stroke of the right support shoe cylinder (9).

10. A TBM, characterized in that, The hydraulic control system for the support shoe as described in any one of claims 1 to 9 is adopted.

Images