Shield construction control system, control method and shield machine

Abstract

The present invention relates to a shield construction control system, a control method and a shield machine, wherein the shield construction control system includes a control component, including: at least two propulsion cylinder groups; at least two first control valve groups, connected to the at least two propulsion cylinder groups in a one-to-one correspondence; and a second control valve group, configured to operably allow hydraulic oil to enter the propulsion cylinder group, and at the same time adjust the pressure of the hydraulic oil entering the propulsion cylinder group; wherein the shield construction control system includes a push-to-pick step-by-step mode and a push-to-pick synchronization mode; in the push-to-pick step-by-step mode, at least two propulsion cylinder groups are configured to be all controlled by at least two first control valve groups; in the push-to-pick synchronization mode, at least two propulsion cylinder groups are configured to be controlled by the second control valve group for the first part of the propulsion cylinder group, and the second part of the propulsion cylinder group is controlled by the first control valve group in part of the at least two first control valve groups. The present invention can improve the efficiency of shield construction operations.

Description

Technical Field

[0001] The invention relates to the field of tunnel shield construction, and in particular to a shield construction control system, a control method and a shield machine. Background Art

[0002] During the shield construction process, the time spent on excavation and segment assembly accounts for more than half of the entire construction process, so it is urgent to improve the efficiency of excavation and assembly. At present, tunnel construction mostly adopts a serial mode of push-assembly-push-assembly sequence. During the normal construction of the shield machine, the propulsion system first excavates a ring distance, then assembles the segments, and then continues to excavate after the assembly is completed. This cycle continues. Both propulsion and assembly require the use of propulsion cylinders, and they are two serial processes, which is time-consuming and inefficient. Summary of the invention

[0003] Some embodiments of the present invention provide a shield construction control system, a control method and a shield machine, which are used to alleviate the problem of low efficiency of shield construction operations.

[0004] In one aspect of the present invention, a shield construction control system is provided, comprising a control component, wherein the control component comprises:

[0005] At least two propulsion cylinder groups;

[0006] at least two first control valve groups connected to the at least two propulsion cylinder groups in a one-to-one correspondence, the first control valve groups being configured to operably allow hydraulic oil to enter the corresponding propulsion cylinder groups; and

[0007] a second control valve group, connected to the at least two propulsion cylinder groups respectively, the second control valve group being configured to operably allow hydraulic oil to enter the propulsion cylinder group and simultaneously adjust the pressure of the hydraulic oil entering the propulsion cylinder group;

[0008] Wherein, the shield construction control system includes a push-and-splice step-by-step mode and a push-and-splice synchronous mode;

[0009] In the push-pushing step-by-step mode, the at least two propulsion cylinder groups are configured so that all oil inlet is controlled by the at least two first control valve groups;

[0010] In the push-and-spell synchronization mode, the at least two propulsion cylinder groups are configured so that the first part of the propulsion cylinder group is controlled by the second control valve group for oil inlet, and the second part of the propulsion cylinder group is controlled by part of the first control valve groups among the at least two first control valve groups for oil inlet.

[0011] In some embodiments, in the step-by-step assembly mode, the at least two first control valve groups are configured to operably allow hydraulic oil to enter the rodless chambers of the at least two propulsion cylinder groups so that the at least two propulsion cylinder groups can be extended to perform propulsion operations, or to operably allow hydraulic oil to enter the rod chambers of the at least two propulsion cylinder groups so that the at least two propulsion cylinder groups can be retracted to form a space for segment assembly operations.

[0012] In some embodiments, in the pushing-assembly synchronization mode, the second control valve group is configured to operably allow hydraulic oil to enter the rodless chamber of the first part of the propulsion cylinder group to extend the first part of the propulsion cylinder group to perform a propulsion operation, and some of the at least two first control valve groups are configured to operably allow hydraulic oil to enter the rod chamber of the second part of the propulsion cylinder group to retract the second part of the propulsion cylinder group to form a space for segment assembly operations.

[0013] In some embodiments, the second control valve group includes at least two pressure regulating valve groups, and the at least two pressure regulating valve groups are connected to the at least two propulsion cylinder groups in a one-to-one correspondence, and each pressure regulating valve group is configured to perform pressure regulation individually.

[0014] In some embodiments, the pressure regulating valve group includes a proportional pressure reducing valve and a reversing valve connected in series, the proportional pressure reducing valve is arranged upstream of the reversing valve, the reversing valve includes a first position and a second position, the reversing valve is located at the first position, and the oil circuit between the proportional pressure reducing valve and the propulsion cylinder group is disconnected, the reversing valve is located at the second position, and the oil circuit between the proportional pressure reducing valve and the propulsion cylinder group is connected.

[0015] In some embodiments, the control component also includes a pressure-stabilizing valve group, which is respectively connected to the at least two first control valve groups, and the pressure-stabilizing valve group is configured to stabilize the pressure of the hydraulic oil and then send it into the at least two thrust cylinder groups through the at least two first control valve groups.

[0016] In some embodiments, the shield construction control system further includes an oil source and a third control valve group, wherein the input end of the third control valve group is connected to the oil source, and the output end of the third control valve group is connected to the control component;

[0017] In the push-pushing step-by-step mode, the third control valve group is configured to deliver all the hydraulic oil provided by the oil source to the at least two first control valve groups in the control assembly;

[0018] In the pushing and pulling synchronization mode, the third control valve group is configured to deliver a portion of the hydraulic oil provided by the oil source to the at least two first control valve groups in the control assembly, and another portion of the hydraulic oil to the second control valve group in the control assembly.

[0019] In some embodiments, the third control valve group includes a first switching valve and a second switching valve;

[0020] In the push-pushing step-by-step mode, the first switching valve is in operation, and the second switching valve is inoperable, so that all the hydraulic oil provided by the oil source is delivered to the at least two first control valve groups in the control assembly;

[0021] In the pushing and pulling synchronization mode, both the first switching valve and the second switching valve work so that a part of the hydraulic oil provided by the oil source is sent to the at least two first control valve groups in the control assembly, and another part of the hydraulic oil is sent to the second control valve group in the control assembly.

[0022] In some embodiments, the first switching valve includes a first cartridge valve and a first reversing valve, the oil inlet of the first cartridge valve is connected to the oil source, the oil outlet of the first cartridge valve is connected to the at least two first control valve groups in the control component, and the first reversing valve includes a first working position and a second working position; when the first switching valve is not working, the first reversing valve is in the first working position, the oil circuit between the oil source and the spring control end of the first cartridge valve is connected, and the oil inlet and oil outlet of the first cartridge valve are disconnected; when the first switching valve is working, the first reversing valve is in the second working position, the oil circuit between the oil source and the spring control end of the first cartridge valve is disconnected, and the oil inlet and oil outlet of the first cartridge valve are connected.

[0023] In some embodiments, the second switching valve includes a second cartridge valve and a second reversing valve, the oil inlet of the second cartridge valve is connected to the oil source, the oil outlet of the second cartridge valve is connected to the second control valve group in the control assembly, the second reversing valve includes a first position and a second position, when the second switching valve is not working, the second reversing valve is in the first position, the oil circuit between the oil source and the spring control end of the second cartridge valve is connected, and the oil inlet and oil outlet of the second cartridge valve are disconnected; when the second switching valve is working, the second reversing valve is in the second position, the oil circuit between the oil source and the spring control end of the second cartridge valve is disconnected, and the oil inlet and oil outlet of the second cartridge valve are connected.

[0024] In some embodiments, the number of the control components is at least two sets, and the at least two sets of control components are configured to control shield construction operations in at least two partitions of the shield construction space.

[0025] In some embodiments, in the push-and-assemble step-by-step mode, at least two sets of control components are configured to perform a push operation simultaneously. After reaching a preset stroke of the push cylinder group, each set of control components is respectively configured to control the corresponding push cylinder group to retract in sequence to form a space for segment assembly operations.

[0026] In the push-and-assemble synchronous mode, one of the at least two control components is configured to control the corresponding propulsion cylinder group to retract to form a space for segment assembly operations, while the other control components are configured to continue the propulsion operations.

[0027] In another aspect of the present invention, a control method of the shield construction control system is provided, wherein the control method of the control component in the push-and-splice step-by-step mode and the push-and-splice synchronous mode comprises the following steps:

[0028] In the push-and-assemble step-by-step mode, the at least two first control valve groups control the at least two propulsion oil cylinder groups to supply oil, so that the at least two propulsion oil cylinder groups extend to perform a propulsion operation. After reaching a preset stroke of the propulsion oil cylinder group, the at least two first control valve groups control the at least two propulsion oil cylinder groups to supply oil, so that the at least two propulsion oil cylinder groups retract to form a space for segment assembly operations.

[0029] In the pushing and splicing synchronous mode, the at least two first control valve groups control the oil supply to the at least two propulsion cylinder groups, so that the at least two propulsion cylinder groups extend to perform the pushing operation. When the stroke of the propulsion cylinder group is greater than or equal to the width of the pipe segment, the second control valve group controls the oil supply to the first part of the propulsion cylinder group, and the first part of the propulsion cylinder group continues to extend to perform the pushing operation, and the pressure of the hydraulic oil entering the first part of the propulsion cylinder group is adjusted by the second control valve group. At the same time, part of the first control valve group controls the oil supply to the second part of the propulsion cylinder group to retract the second part of the propulsion cylinder group to form a space for the pipe segment assembly operation.

[0030] In some embodiments, the number of the control components is at least two sets;

[0031] In the push-and-assemble step-by-step mode, at least two sets of control components are configured to perform push operations simultaneously. After reaching the preset stroke of the push cylinder group, each set of control components is configured to control the corresponding push cylinder group to retract in turn, forming a space for segment assembly operations;

[0032] In the push-and-assemble synchronous mode, one of the at least two control components is configured to control the corresponding propulsion cylinder group to retract to form a space for segment assembly operations, while the other control components are configured to continue the propulsion operations.

[0033] In another aspect of the present invention, a shield machine is provided, which includes the above-mentioned shield construction control system.

[0034] Based on the above technical solution, the present invention has at least the following beneficial effects:

[0035] In some embodiments, the shield construction control system includes a push-and-assemble step-by-step mode and a push-and-assemble synchronous mode. In the push-and-assemble synchronous mode, part of the propulsion cylinder group retracts to form a space for segment assembly operations to cooperate with the segment assembly operations. At the same time, the second control valve group controls the other part of the propulsion cylinder group to continue to extend for propulsion operations, and the pressure of the hydraulic oil entering the other part of the propulsion cylinder group is adjusted by the second control valve group to perform precise pressure control on each propulsion cylinder to ensure that after part of the propulsion cylinders are retracted, the posture of the shield remains unchanged, thereby improving construction efficiency and safety and ensuring construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0037] Figure 1 A schematic diagram of a shield construction control system provided according to some embodiments of the present invention;

[0038] Figure 2 A schematic diagram of a shield construction control system provided according to some other embodiments of the present invention;

[0039] Figure 3 A schematic diagram of a first control valve group provided according to some embodiments of the present invention;

[0040] Figure 4 A schematic diagram of a second control valve group provided according to some embodiments of the present invention;

[0041] Figure 5 A schematic diagram of a third control valve group provided according to some embodiments of the present invention;

[0042] Figure 6 A schematic diagram of a pressure-stabilizing valve group provided according to some embodiments of the present invention;

[0043] Figure 7 Schematic diagram of a pressure-stabilizing valve group provided according to some other embodiments of the present invention.

[0044] The reference numerals in the accompanying drawings are described as follows:

[0045] 100-control component;

[0046] 1-first control valve group; 11-fifth reversing valve; 12-fifth cartridge valve; 13-sixth reversing valve; 14-second check valve; 15-overflow valve; 16-seventh reversing valve; 17-hydraulic lock; 18-pressure sensor;

[0047] 2-second control valve group; 21-pressure regulating valve group; 211-proportional pressure reducing valve; 212-reversing valve;

[0048] 3-third control valve group; 31-first switching valve; 311-first cartridge valve; 312-first reversing valve; 32-second switching valve; 321-second cartridge valve; 322-second reversing valve;

[0049] 4- propulsion cylinder group;

[0050] 5-pressure stabilizing valve group; 51-third cartridge valve; 52-third reversing valve; 53-first proportional pressure reducing valve; 54-first check valve; 55-fourth cartridge valve; 56-fourth reversing valve; 57-proportional speed regulating valve; 58-overflow valve;

[0051] 6-Oil source.

[0052] It should be understood that the size of each part shown in the accompanying drawings is not drawn according to the actual proportional relationship. In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION

[0053] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, rather than as limitations.

[0054] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0055] In the present invention, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices but have an intermediate device.

[0056] All terms (including technical terms or scientific terms) used in the present invention have the same meanings as those understood by ordinary technicians in the field to which the present invention belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0057] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0058] Based on the problem that the current tunnel construction mostly adopts a series mode of push-assemble-push-assemble sequential operation, that is, the push system first advances a ring distance, and then assembles the segments, and continues to excavate after the segment assembly is completed, and so on, which is time-consuming and inefficient, some embodiments of the present invention provide a shield construction control system, a control method and a shield machine, which can realize the switching between the push-assemble step-by-step mode and the push-assemble synchronous mode during the shield construction operation, and in the push-assemble synchronous mode, the push and segment assembly can be carried out simultaneously, thereby improving the shield construction efficiency.

[0059] Among them, the pushing and assembling step-by-step mode refers to the serial working mode of the pushing-assembling-pushing-assembling sequential operations in the relevant technology, and the pushing and assembling synchronous mode refers to the working mode in which pushing and assembling the segments are carried out simultaneously.

[0060] refer to Figure 1 and Figure 2 In some embodiments, the shield construction control system includes a control component 100, and the control component 100 includes at least two propulsion cylinder groups 4, at least two first control valve groups 1 and second control valve groups 2.

[0061] For at least two propulsion cylinder groups 4, each of the propulsion cylinder groups 4 includes at least one propulsion cylinder. For example, each propulsion cylinder group 4 may include one propulsion cylinder, two propulsion cylinders, or more than three propulsion cylinders.

[0062] At least two first control valve groups 1 are connected to at least two propulsion cylinder groups 4 in a one-to-one correspondence, and the first control valve groups 1 are configured to operably allow hydraulic oil to enter the corresponding propulsion cylinder groups 4. Each first control valve group 1 is correspondingly connected to a propulsion cylinder group 4, and each first control valve group 1 controls the oil inlet of a propulsion cylinder group 4.

[0063] The second control valve group 2 is respectively connected to at least two propulsion cylinder groups 4 , and the second control valve group 2 is configured to operably allow hydraulic oil to enter the propulsion cylinder group 4 and adjust the pressure of the hydraulic oil entering the propulsion cylinder group 4 .

[0064] Among them, the shield construction control system includes a push-and-splice step-by-step mode and a push-and-splice synchronous mode.

[0065] In the push-pushing step-by-step mode, at least two propulsion cylinder groups 4 are configured so that the oil inlet is completely controlled by at least two first control valve groups 1 .

[0066] In the push-and-spin synchronization mode, at least two propulsion cylinder groups 4 are configured so that the first part of the propulsion cylinder group 4 is controlled by the second control valve group 2 for oil inlet, and the second part of the propulsion cylinder group 4 is controlled by part of the first control valve groups 1 in at least two first control valve groups 1 for oil inlet.

[0067] In some embodiments, in the step-by-step assembly mode, at least two propulsion cylinder groups 4 are configured to be all controlled by at least two first control valve groups 1 to control the oil supply, so that each propulsion cylinder group 4 is extended to perform propulsion operations, or each propulsion cylinder group 4 is retracted to form a space for segment assembly operations.

[0068] In some embodiments, in the pushing and splicing synchronization mode, at least two propulsion cylinder groups 4 are configured such that the first part of the propulsion cylinder group 4 is controlled by the second control valve group 2 to control the oil supply so that the first part of the propulsion cylinder group 4 is extended to perform the propulsion operation, and the second part of the propulsion cylinder group 4 is controlled by the part of the first control valve group 1 in at least two first control valve groups 1 to control the oil supply so that the second part of the propulsion cylinder group 4 is retracted to form a space for the pipe segment assembly operation.

[0069] In the push-to-splice synchronization mode, at least two propulsion cylinder groups 4 are divided into a first propulsion cylinder group 4 and a second propulsion cylinder group 4. During the shield construction process, which propulsion cylinder groups 4 are included in the first propulsion cylinder group 4 is not fixed, and similarly, which propulsion cylinder groups 4 are included in the second propulsion cylinder group 4 is not fixed.

[0070] The shield construction control system provided by the embodiment of the present disclosure includes two working modes. When the advancing speed is faster, the push-and-splice step-by-step mode can be adopted. When the advancing speed is slower, the push-and-splice synchronous mode can be adopted to integrate the segment assembly process into the advancing process.

[0071] In the push-and-segment synchronization mode, part of the first control valve group 1 controls the oil supply to the second part of the propulsion cylinder group 4 of at least two propulsion cylinder groups 4, so that the second part of the propulsion cylinder group 4 retracts to form a space for the segment assembly operation and cooperate with the segment assembly operation. At the same time, the second control valve group 2 controls the oil supply to the first part of the propulsion cylinder group 4 of at least two propulsion cylinder groups 4, and the first part of the propulsion cylinder group 4 continues to extend for the propulsion operation. Since part of the first control valve group 1 controls the retraction of the second part of the propulsion cylinder group 4 of at least two propulsion cylinder groups 4, the remaining propulsion cylinder group 4 (the first part of the propulsion cylinder group 4) needs to ensure that the propulsion force and the point of action remain unchanged. Therefore, the pressure of the hydraulic oil entering the first part of the propulsion cylinder group 4 is adjusted by the second control valve group 2, and the pressure of each remaining propulsion cylinder is precisely controlled to ensure that after the partial propulsion cylinders are retracted, the propulsion force and the point of action remain unchanged, and the posture of the shield remains unchanged, so as to improve construction efficiency and construction safety and ensure construction quality.

[0072] Therefore, the shield construction control system provided by the embodiment of the present disclosure can achieve synchronous excavation and assembly, and the pipe segments can be assembled during excavation, which greatly improves the construction efficiency and safety and ensures the construction quality.

[0073] In some embodiments, the first control valve group 1 is configured to operably allow hydraulic oil to enter the rodless chamber or the rod chamber of the corresponding propulsion cylinder group 4 to extend or retract the propulsion cylinder group 4 .

[0074] In some embodiments, the second control valve group 2 is configured to operably allow hydraulic oil to enter the rodless chamber of the propulsion cylinder group 4 to extend the propulsion cylinder group 4 .

[0075] In some embodiments, in the step-by-step assembly mode, at least two first control valve groups 1 are configured to operably allow hydraulic oil to enter the rodless chambers of at least two propulsion cylinder groups 4 so that the at least two propulsion cylinder groups 4 are extended to perform propulsion operations, or to operably allow hydraulic oil to enter the rod chambers of at least two propulsion cylinder groups 4 so that the at least two propulsion cylinder groups 4 are retracted to form a space for segment assembly operations.

[0076] In some embodiments, the cylinder barrel of each thrust cylinder in the thrust cylinder group 4 is connected to the shield main machine, and the cylinder rod is used to abut the pipe segment. When high-pressure oil is introduced into the thrust cylinder and the cylinder rod of the thrust cylinder is extended to push the pipe segment, the shield main machine performs a thrust operation. After reaching the preset stroke of the thrust cylinder, the cylinder rods of some thrust cylinders are retracted in sequence along the circumference of the shield construction space, and an assembly space for a pipe segment can be formed each time. Therefore, the pipe segments can be assembled one by one in sequence. After the pipe segments are assembled, the cylinder rod of the thrust cylinder can push the pipe segment to fix the pipe segment. At this time, the thrust cylinder contains low-pressure oil, and the cylinder rod of the thrust cylinder pushes the pipe segment with a relatively small force. After a ring of pipe segments in the shield construction space is assembled, when it is necessary to continue the thrust operation, high-pressure oil enters each thrust cylinder, and the cylinder rod of the thrust cylinder pushes the pipe segment, and the shield main machine continues to perform the thrust operation.

[0077] In some embodiments, in the pushing and splicing synchronization mode, the second control valve group 2 is configured to operably allow hydraulic oil to enter the rodless chamber of the first part of the propulsion cylinder group 4 of at least two propulsion cylinder groups 4, so that the first part of the propulsion cylinder group 4 is extended to perform the propulsion operation, and some of the first control valve groups 1 in the at least two first control valve groups 1 are configured to operably allow hydraulic oil to enter the rod chamber of the second part of the propulsion cylinder group 4 of the at least two propulsion cylinder groups 4, so that the second part of the propulsion cylinder group 4 is retracted to form a space for the pipe segment assembly operation.

[0078] In some embodiments, the cylinder barrel of each propulsion cylinder in the propulsion cylinder group 4 is connected to the shield main machine, and the cylinder rod is used to abut the pipe segment. When high-pressure oil is introduced into the propulsion cylinder and the cylinder rod of the propulsion cylinder is extended to push the pipe segment, the shield main machine performs a propulsion operation. When the propulsion distance is greater than or equal to the width of the pipe segment, part of the first control valve groups 1 in at least two first control valve groups 1 allow hydraulic oil to enter the rod cavity of the second part propulsion cylinder group 4 of at least two propulsion cylinder groups 4, so that the second part propulsion cylinder group 4 can be retracted to form a space for pipe segment assembly operations and cooperate in the pipe segment assembly. At the same time, the second control valve group 2 allows hydraulic oil to enter the rodless cavity of the first part propulsion cylinder group 4 of at least two propulsion cylinder groups 4, so that the first part propulsion cylinder group 4 can continue to extend for propulsion operations.

[0079] In some embodiments, the second control valve group 2 includes at least two pressure regulating valve groups 21, and the at least two pressure regulating valve groups 21 are connected to at least two propulsion cylinder groups 4 in a one-to-one correspondence, and each pressure regulating valve group 21 is configured to perform pressure regulation individually.

[0080] Each pressure regulating valve group 21 is connected to a corresponding propulsion cylinder group 4 , each pressure regulating valve group 21 controls the oil supply to a corresponding propulsion cylinder group 4 , and each pressure regulating valve group 21 can individually regulate the pressure of the hydraulic oil entering its corresponding propulsion cylinder group 4 .

[0081] In the synchronous pushing and assembling mode, part of the first control valve group 1 controls the retraction of the second part of the thrust cylinder group 4 of at least two thrust cylinder groups 4 to form a space for the segment assembly operation, and the remaining thrust cylinder group 4 (the first part of the thrust cylinder group 4) is controlled by the second control valve group 2 to continue to extend for the pushing operation, so the first part of the thrust cylinder group 4 needs to ensure that the thrust force and the point of action remain unchanged. Therefore, the pressure of the first part of the thrust cylinder group 4 is adjusted separately through each pressure regulating valve group 21, so as to achieve precise pressure control of each remaining thrust cylinder that has not been retracted, and ensure that after the partial thrust cylinders are retracted, the posture of the shield remains unchanged, so as to improve construction efficiency and construction safety and ensure construction quality.

[0082] like Figure 4 As shown, in some embodiments, the pressure regulating valve group 21 includes a proportional pressure reducing valve 211 and a reversing valve 212 connected in series, the proportional pressure reducing valve 211 is arranged upstream of the reversing valve 212, the reversing valve 212 includes a first position and a second position, the reversing valve 212 is located in the first position, and the oil circuit between the proportional pressure reducing valve 211 and the propulsion cylinder group 4 is disconnected, the reversing valve 212 is located in the second position, and the oil circuit between the proportional pressure reducing valve 211 and the propulsion cylinder group 4 is connected.

[0083] In some embodiments, the pressure of each group of propulsion cylinders is controlled during the synchronous pushing and assembling of the shield through the second control valve group 2 to ensure that the combined force and posture of the shield meet the construction requirements. During the construction process, the power required for each remaining propulsion cylinder that has not been retracted can be dynamically calculated in real time through an algorithm, and then the pressure of each remaining propulsion cylinder is accurately controlled through the proportional pressure reducing valve 211 to ensure that the posture of the shield remains unchanged after some propulsion cylinders are retracted, thereby improving construction efficiency and construction safety and ensuring construction quality.

[0084] like Figure 1 and Figure 2 As shown, in some embodiments, the control component 100 also includes a pressure-stabilizing valve group 5, which is respectively connected to at least two first control valve groups 1. The pressure-stabilizing valve group 5 is configured to stabilize the pressure of the hydraulic oil and then send it to at least two propulsion cylinder groups 4 through at least two first control valve groups 1.

[0085] The pressure stabilizing valve group 5 is used to regulate the overall pressure of the hydraulic oil entering at least two first control valve groups 1. The pressure and function control of the first control valve group 1 is realized through the pressure stabilizing valve group 5 to perform normal excavation and assembly. The pressure stabilizing valve group 5 can have multiple implementation forms. Two embodiments of the pressure stabilizing valve group 5 are listed below.

[0086] like Figure 6As shown, in some embodiments, the pressure stabilizing valve group 5 includes a third cartridge valve 51 , a third reversing valve 52 , a first proportional pressure reducing valve 53 and a first check valve 54 .

[0087] The third reversing valve 52 is used to control the opening or closing of the third cartridge valve 51. When the third reversing valve 52 is energized, the third cartridge valve 51 is opened, and the hydraulic oil enters the first control valve group 1 through the third cartridge valve 51, and enters the first control valve group 1 through the first proportional pressure reducing valve 53 and the first non-return valve 54. When the third reversing valve 52 loses power, the third cartridge valve 51 is closed, and all the hydraulic oil enters the first control valve group 1 through the first proportional pressure reducing valve 53 and the first non-return valve 54. The first proportional pressure reducing valve 53 is used to regulate the pressure of the hydraulic oil so that the hydraulic oil pressure stabilizes before entering the first control valve group 1. The first non-return valve 54 is used to prevent the hydraulic oil of the first control valve group 1 from flowing back to the first proportional pressure reducing valve 53.

[0088] like Figure 7 As shown, in other embodiments, the pressure stabilizing valve group 5 includes a fourth cartridge valve 55 , a fourth reversing valve 56 , a proportional speed regulating valve 57 and a relief valve 58 .

[0089] The fourth reversing valve 56 is used to control the opening or closing of the fourth cartridge valve 55. For example, when the fourth reversing valve 56 is energized, the fourth cartridge valve 55 is opened, and the hydraulic oil enters the first control valve group 1 through the fourth cartridge valve 55, and enters the first control valve group 1 through the proportional speed regulating valve 57 and the relief valve 58. When the fourth reversing valve 56 is de-energized, the fourth cartridge valve 55 is closed, and all the hydraulic oil enters the first control valve group 1 through the proportional speed regulating valve 57 and the relief valve 58. The proportional speed regulating valve 57 and the relief valve 58 are used to regulate the pressure of the hydraulic oil so that the hydraulic oil enters the first control valve group 1 after the pressure is stabilized.

[0090] In some embodiments, the shield construction control system further includes an oil source 6 and a third control valve group 3 , wherein an input end of the third control valve group 3 is connected to the oil source 6 , and an output end of the third control valve group 3 is connected to the control component 100 .

[0091] In the push-pull step-by-step mode, the third control valve group 3 is configured to deliver all the hydraulic oil provided by the oil source 6 to at least two first control valve groups 1 in the control assembly 100 .

[0092] In the push-pushing synchronization mode, the third control valve group 3 is configured to deliver a portion of the hydraulic oil provided by the oil source 6 to at least two first control valve groups 1 in the control component 100, and another portion of the hydraulic oil to the second control valve group 2 in the control component 100.

[0093] The third control valve group 3 can be used to switch between the push-pushing step-by-step mode and the push-pushing synchronous mode.

[0094] In the push-pushing synchronous mode, although the third control valve group 3 sends a part of the hydraulic oil provided by the oil source 6 to at least two first control valve groups 1 in the control assembly 100, each first control valve group 1 can choose to send the hydraulic oil to the propulsion cylinder or not according to the setting. For example: some of the first control valve groups 1 work and send the hydraulic oil to the corresponding propulsion cylinder group 4, and some of the first control valve groups 1 do not work and do not send the hydraulic oil to the corresponding propulsion cylinder group 4.

[0095] like Figure 1 and Figure 2 As shown, in some embodiments, the third control valve group 3 includes a first switching valve 31 and a second switching valve 32 .

[0096] In the push-pushing step-by-step mode, the first switching valve 31 works and the second switching valve 32 does not work, so that all the hydraulic oil provided by the oil source 6 is delivered to at least two first control valve groups 1 in the control assembly 100 .

[0097] In the push-pushing synchronization mode, both the first switching valve 31 and the second switching valve 32 work so that a part of the hydraulic oil provided by the oil source 6 is sent to at least two first control valve groups 1 in the control component 100, and the other part of the hydraulic oil is sent to the second control valve group 2 in the control component 100.

[0098] like Figure 5 As shown, in some embodiments, the first switching valve 31 includes a first cartridge valve 311 and a first reversing valve 312, the oil inlet of the first cartridge valve 311 is connected to the oil source 6, the oil outlet of the first cartridge valve 311 is connected to at least two first control valve groups 1 in the control component 100, and the first reversing valve 312 includes a first position and a second position; when the first switching valve 31 is not working, the first reversing valve 312 is in the first position, the oil circuit between the oil source 6 and the spring control end of the first cartridge valve 311 is connected, and the oil inlet and the oil outlet of the first cartridge valve 311 are disconnected; when the first switching valve 31 is working, the first reversing valve 312 is in the second position, the oil circuit between the oil source 6 and the spring control end of the first cartridge valve 311 is disconnected, and the oil inlet and the oil outlet of the first cartridge valve 311 are connected.

[0099] like Figure 5As shown, in some embodiments, the second switching valve 32 includes a second cartridge valve 321 and a second reversing valve 322, the oil inlet of the second cartridge valve 321 is connected to the oil source 6, and the oil outlet of the second cartridge valve 321 is connected to the second control valve group 2 in the control component 100, and the second reversing valve 322 includes a first position and a second position. When the second switching valve 32 is not working, the second reversing valve 322 is in the first position, the oil circuit between the oil source 6 and the spring control end of the second cartridge valve 321 is connected, and the oil inlet and the oil outlet of the second cartridge valve 321 are disconnected; when the second switching valve 32 is working, the second reversing valve 322 is in the second position, the oil circuit between the oil source 6 and the spring control end of the second cartridge valve 321 is disconnected, and the oil inlet and the oil outlet of the second cartridge valve 321 are connected.

[0100] like Figure 1 and Figure 2 As shown, the first control valve group 1 is used to control the hydraulic oil to enter the rod chamber or rodless chamber of the propulsion cylinder group 4 and to control the pressure relief and oil return of the propulsion cylinder group 4. The first control valve group 1 can have multiple implementation forms, and a specific embodiment of the first control valve group 1 is listed below.

[0101] like Figure 3 As shown, the first control valve group 1 includes a fifth reversing valve 11 , a fifth cartridge valve 12 , a sixth reversing valve 13 , a second non-return valve 14 , a relief valve 15 , a seventh reversing valve 16 , a hydraulic lock 17 and a pressure sensor 18 .

[0102] The fifth reversing valve 11 is used to control the opening or closing of the fifth cartridge valve 12. When the fifth reversing valve 11 is energized, the fifth cartridge valve 12 is opened, and the oil return of the rodless chamber of the propulsion cylinder is realized. When the fifth reversing valve 11 is de-energized, the fifth cartridge valve 12 is closed. The sixth reversing valve 13 is used to control the hydraulic oil to enter the rod chamber or the rodless chamber of the propulsion cylinder. The second one-way valve 14 is used to prevent the hydraulic oil in the oil tank from being sucked back to the sixth reversing valve 13. The seventh reversing valve 16 is used to relieve the pressure of the rodless chamber of the propulsion cylinder. The hydraulic lock 17 is used to lock the state of the propulsion cylinder. The pressure sensor 8 is used to detect the pressure of the rodless chamber of the propulsion cylinder.

[0103] In some embodiments, the oil source 6 includes an oil tank and a hydraulic pump.

[0104] In some embodiments, the number of control components 100 is at least two, and the at least two control components 100 are configured to control shield construction operations in at least two partitions of the shield construction space.

[0105] In some embodiments, in the push-and-assemble step-by-step mode, at least two sets of control components 100 are configured to perform pushing operations simultaneously. After reaching the preset stroke of the pushing cylinder group 4, each set of control components 100 is configured in turn to control the corresponding pushing cylinder group 4 to retract, forming a space for the pipe segment assembly operation.

[0106] The preset stroke of the propulsion cylinder group 4 in the embodiment of the present disclosure may be a stroke greater than or equal to the width of the pipe segment. The preset stroke of the propulsion cylinder group 4 is less than or equal to the maximum stroke of the propulsion cylinder group 4.

[0107] In some embodiments, in the push-and-assemble synchronization mode, one of the at least two control components 100 is configured to control the corresponding propulsion cylinder group 4 to retract to form a space for segment assembly operations, while the other control components 100 are configured to continue the propulsion operations.

[0108] Some embodiments further provide a control method for the shield construction control system described above, wherein the control method for the control component 100 in the push-and-splice step-by-step mode and the push-and-splice synchronous mode comprises the following steps:

[0109] In the push-and-assemble step-by-step mode, at least two first control valve groups 1 control the oil supply of at least two propulsion oil cylinder groups 4, so that at least two propulsion oil cylinder groups 4 extend to perform a propulsion operation. After reaching a preset stroke of the propulsion oil cylinder group 4, at least two first control valve groups 1 control the oil supply of at least two propulsion oil cylinder groups 4, so that at least two propulsion oil cylinder groups 4 retract to form a space for segment assembly operations.

[0110] In the pushing and assembling synchronous mode, at least two first control valve groups 1 control the oil supply to at least two propulsion cylinder groups 4, so that at least two propulsion cylinder groups 4 are extended to perform the pushing operation. When the stroke of the propulsion cylinder group 4 is greater than or equal to the width of the pipe segment, the second control valve group 2 controls the oil supply to the first part of the propulsion cylinder group 4 of the at least two propulsion cylinder groups 4, and the first part of the propulsion cylinder group 4 continues to extend for the pushing operation, and the pressure of the hydraulic oil entering the first part of the propulsion cylinder group 4 is adjusted by the second control valve group 2. At the same time, part of the first control valve group 1 controls the oil supply to the second part of the propulsion cylinder group 4 of the at least two propulsion cylinder groups 4, so that the second part of the propulsion cylinder group 4 is retracted to form a space for the pipe segment assembly operation.

[0111] In some embodiments, the number of control components 100 is at least two sets; the control method of at least two sets of control components 100 in the push-pull step mode and the push-pull synchronization mode includes the following steps:

[0112] In the push-and-assemble step-by-step mode, at least two sets of control components 100 are configured to perform the pushing operation simultaneously. After reaching the preset stroke of the pushing cylinder group 4, each set of control components 100 is respectively configured to control the corresponding pushing cylinder group 4 to retract in turn, forming a space for the segment assembly operation;

[0113] In the push-and-assemble synchronous mode, one of the at least two control components 100 is configured to control the corresponding propulsion cylinder group 4 to retract to form a space for segment assembly operations, while the other control components 100 are configured to continue the propulsion operations.

[0114] The number of propulsion cylinder groups 4 in each set of control components 100 may be the same or different. For example, the number of propulsion cylinder groups 4 in one set of control components 100 is k, and the number of propulsion cylinder groups 4 in another set of control components 100 is m.

[0115] The shield construction space can be divided into multiple partitions, and each partition is controlled by a set of control components 100 for construction. For example, the shield construction space can be divided into four partitions: upper left, upper right, lower left and lower right. Correspondingly, four sets of control components 100 can be set up to control the shield construction operations in the four partitions: upper left, upper right, lower left and lower right.

[0116] Combine the following Figures 1 to 7 Two specific embodiments of the shield construction control system are described in detail.

[0117] like Figure 1 , Figures 3 to 6 As shown, in the first embodiment, the shield construction control system includes at least two control components 100, a third control valve group 3 and an oil source 6. The at least two control components 100 are used to control the shield construction operations of at least two partitions of the shield construction operation space, for example: Figure 1 Two control components 100 are shown, which respectively control the shield construction operations in area A and area B of the shield construction operation space. Each control component 100 includes at least two thrust cylinder groups 4, and the number of thrust cylinders in each thrust cylinder group 4 is at least one. Each control component 100 includes a first control valve group 1 and a second control valve group 2.

[0118] The shield construction control system includes push-and-splice step-by-step mode and push-and-splice synchronous mode. The specific workflow is as follows:

[0119] Push and pull step-by-step mode:

[0120] The high-pressure oil provided by the oil source 6 reaches the third control valve group 3, the first switching valve 31 works, the second switching valve 32 does not work, the first reversing valve 312 of the first switching valve 31 is energized in the second position, the oil circuit between the oil source 6 and the spring control end of the first cartridge valve 311 is disconnected, the first cartridge valve 311 is opened, and the oil inlet and oil outlet of the first cartridge valve 311 are connected. At this time, the high-pressure oil flows into the pressure-stabilizing valve group 5 of the control component 100 corresponding to each partition through the oil inlet and oil outlet of the first cartridge valve 311. After the pressure of the high-pressure oil is stabilized by the second proportional reducing valve 53 and the first check valve 54 of the pressure-stabilizing valve group 5, the high-pressure oil enters each first control valve group 1 respectively, and enters the rodless chamber of each propulsion cylinder group 4 through the sixth reversing valve 13 and the hydraulic lock 17 of the first control valve group 1, so that each propulsion cylinder group 4 is extended to perform propulsion operations.

[0121] When the preset stroke of each propulsion cylinder group 4 is reached, the hydraulic pump switches, and the oil source 6 provides low-pressure oil. The low-pressure oil passes through the third control valve group 3 and enters the first control valve group 1 in the control assembly 100 corresponding to a certain area. The first control valve group 1 controls the rod chamber of the required propulsion cylinder group 4 to enter oil, and the required propulsion cylinder group 4 is retracted to assemble the pipe segment. For example, a certain area can be area A. If area A needs to be assembled, multiple propulsion cylinder groups 4 in the control assembly 100 corresponding to area A need to be retracted to meet the pipe segment assembly space.

[0122] In the above process, before retracting the multiple propulsion cylinder groups 4, it is necessary to first relieve the pressure on the multiple propulsion cylinder groups 4, the seventh reversing valve 16 corresponding to the multiple propulsion cylinder groups 4 is energized, and the rodless chamber of the propulsion cylinder group 4 is connected to the cylinder through the seventh reversing valve 6, so as to relieve the pressure on the rodless chamber of the propulsion cylinder group 4.

[0123] After the pressure relief is completed, the low-pressure oil enters the sixth reversing valve 13 through the first proportional pressure reducing valve 53 and the first non-return valve 54. At the same time, in order to ensure the rapid action of the large-flow cylinder, the third reversing valve 52 is energized, the third cartridge valve 51 is opened, and the low-pressure oil enters the sixth reversing valve 13 through the third cartridge valve 51, and enters the rod chamber of the propulsion cylinder group 4 through the sixth reversing valve 13. At the same time, the fifth reversing valve 11 is energized, the fifth cartridge valve 12 is opened, and the oil in the rodless chamber of the propulsion cylinder group 4 flows back to the oil tank through the fifth cartridge valve 12, and the retraction action of the propulsion cylinder group 4 is completed.

[0124] After the assembly of the pipe segments in area A is completed, the thrust cylinder group 4 corresponding to area A extends out at low pressure to stabilize the pipe segments. At this time, the low-pressure oil enters the rodless chamber of the thrust cylinder group 4 through the first proportional pressure reducing valve 53, the third cartridge valve 51, the sixth reversing valve 13 and the hydraulic lock 17. The thrust cylinder group 4 extends out at low pressure, and the low-pressure oil in the rod chamber of the thrust cylinder group 4 flows back to the oil tank through the fifth cartridge valve 12. The assembly of the pipe segments in area A is completed, and the assembly of the pipe segments in the next area is then carried out.

[0125] Push and pull synchronization mode:

[0126] The premise of synchronous pushing and splicing is that the extension of the propulsion cylinder group 4 exceeds the width of the pipe segment, so the principle of conventional pushing and splicing is consistent before synchronous pushing and splicing. When synchronous pushing and splicing is performed, for example, multiple propulsion cylinder groups 4 of the control assembly 100 corresponding to area A need to be assembled into pipe segments, the first switching valve 31 and the second switching valve 32 in the third control valve group 3 are both working, the first reversing valve 312 of the first switching valve 31 is energized in the second position, and the second reversing valve 322 of the second switching valve 32 is also energized in the second position, the first cartridge valve 311 of the first switching valve 31 is opened, and the oil inlet and oil outlet of the first cartridge valve 311 are connected, the second cartridge valve 322 of the second switching valve 32 is also opened, and the oil inlet and oil outlet of the second cartridge valve 322 are connected, and the high-pressure oil flows into the first control valve group 1 and the second control valve group 2 through the first switching valve 31 and the second switching valve 32 of the third control valve group 3.

[0127] Among them, for the multiple propulsion cylinder groups 4 that need to be assembled in the control component 100 corresponding to the A partition, the oil inlet is controlled by part of the first control valve group 1, and the sixth reversing valve 13 is energized to control the hydraulic oil to enter the propulsion cylinder group 3.

[0128] For the propulsion cylinder group 4 that does not need to be assembled, the corresponding sixth reversing valve 13 is powered off, and the hydraulic oil will not enter the propulsion cylinder group 4 through the sixth reversing valve 13. At the same time, the reversing valve 212 of the second control valve group 2 is energized, and the hydraulic oil enters the propulsion cylinder group 4 through the reversing valve 212 after the pressure is adjusted by the proportional pressure reducing valve 211, thereby completing the proportional control of the pressure of each group of propulsion cylinders in the propulsion state.

[0129] That is to say, except for the multiple propulsion cylinder groups 4 that need to be assembled in area A, the other propulsion cylinder groups 4 are all precisely controlled by the proportional pressure reducing valve 211 of the second control valve group 2 according to the algorithm to continue to complete the propulsion action, and the retraction and segment assembly of the multiple propulsion cylinder groups 4 that need to be assembled in area A are controlled according to the conventional propulsion cylinder groups 4. Therefore, it can be ensured that during the retraction of the multiple propulsion cylinder groups 4 that need to be assembled in area A and the process of cooperating in the assembly of segments, the propulsion resultant force and action point of the remaining other propulsion cylinder groups 4 remain unchanged, and the posture of the shield remains unchanged, ensuring the smooth progress of synchronous pushing and assembly.

[0130] like Figure 2 , Figures 3 to 5 and Figure 7 As shown, in the second embodiment, the shield construction control system includes at least two control components 100, a third control valve group 3 and an oil source 6. The at least two control components 100 are used to control the shield construction operations of at least two partitions of the shield construction operation space, for example: Figure 1Two control components 100 are shown in the figure, which respectively control the shield construction work in area A and area B of the shield construction work space. Each control component 100 includes at least two thrust cylinder groups 4, and the number of thrust cylinders 4 in each thrust cylinder group 4 is at least one. Each control component 100 includes a first control valve group 1 and a second control valve group 2.

[0131] The shield construction control system includes push-and-splice step-by-step mode and push-and-splice synchronous mode. The specific workflow is as follows:

[0132] Push and pull step-by-step mode:

[0133] The high-pressure oil provided by the oil source 6 reaches the third control valve group 3, the first switching valve 31 works, the second switching valve 32 does not work, the first reversing valve 312 of the first switching valve 31 is energized in the second position, the oil circuit between the oil source 6 and the spring control end of the first cartridge valve 311 is disconnected, the first cartridge valve 311 is opened, and the oil inlet and the oil outlet of the first cartridge valve 311 are connected. At this time, the high-pressure oil flows into the pressure-stabilizing valve group 5 of the control component 100 corresponding to each partition through the oil inlet and the oil outlet of the first cartridge valve 311. After the pressure of the high-pressure oil is stabilized by the proportional speed control valve 57 and the overflow valve 58 of the pressure-stabilizing valve group 5, the high-pressure oil enters each first control valve group 1 respectively, and enters the rodless chamber of each propulsion cylinder group 4 through the sixth reversing valve 13 and the hydraulic lock 17 of the first control valve group 1, so that each propulsion cylinder group 4 is extended to perform propulsion operations.

[0134] When the preset stroke of each propulsion cylinder group 4 is reached, the hydraulic pump switches, and the oil source 6 provides low-pressure oil. The low-pressure oil passes through the third control valve group 3 and enters the first control valve group 1 in the control assembly 100 corresponding to a certain area. The first control valve group 1 controls the rod chamber of the required propulsion cylinder group 4 to enter oil, and the required propulsion cylinder group 4 is retracted to assemble the pipe segment. For example, a certain area can be area A. If area A needs to be assembled, multiple propulsion cylinder groups 4 in the control assembly 100 corresponding to area A need to be retracted to meet the pipe segment assembly space.

[0135] In the above process, before retracting the multiple propulsion cylinder groups 4, it is necessary to first relieve the pressure on the multiple propulsion cylinder groups 4, the seventh reversing valve 16 corresponding to the multiple propulsion cylinder groups 4 is energized, and the rodless chamber of the propulsion cylinder group 4 is connected to the cylinder through the seventh reversing valve 6, so as to relieve the pressure on the rodless chamber of the propulsion cylinder group 4.

[0136] After the pressure relief is completed, the low-pressure oil enters the sixth reversing valve 13 through the proportional speed control valve 57 and the relief valve 58. At the same time, in order to ensure the rapid action of the large-flow cylinder, the third reversing valve 52 is energized, the third cartridge valve 51 is opened, and the low-pressure oil enters the sixth reversing valve 13 through the third cartridge valve 51, and enters the rod chamber of the propulsion cylinder group 4 through the sixth reversing valve 13. At the same time, the fifth reversing valve 11 is energized, the fifth cartridge valve 12 is opened, and the oil in the rodless chamber of the propulsion cylinder group 4 flows back to the oil tank through the fifth cartridge valve 12, and the retraction action of the propulsion cylinder group 4 is completed.

[0137] After the segment assembly in area A is completed, the thrust cylinder group 4 corresponding to area A extends out at low pressure to stabilize the segment. At this time, the low-pressure oil passes through the proportional speed control valve 57, the overflow valve 58, the sixth reversing valve 13 and the hydraulic lock 17 to thrust the rodless chamber of the thrust cylinder group 4, and the thrust cylinder group 4 extends out at low pressure. The low-pressure oil in the rod chamber of the thrust cylinder group 4 flows back to the oil tank through the fifth cartridge valve 12. The segment assembly in area A is completed, and the segment assembly in the next area is then carried out.

[0138] Push and pull synchronization mode:

[0139] The premise of synchronous pushing and splicing is that the extension of the propulsion cylinder group 4 exceeds the width of the pipe segment, so the principle of conventional pushing and splicing is consistent before synchronous pushing and splicing. When synchronous pushing and splicing is performed, for example, multiple propulsion cylinder groups 4 of the control assembly 100 corresponding to area A need to be assembled into pipe segments, the first switching valve 31 and the second switching valve 32 in the third control valve group 3 are both working, the first reversing valve 312 of the first switching valve 31 is energized in the second position, and the second reversing valve 322 of the second switching valve 32 is also energized in the second position, the first cartridge valve 311 of the first switching valve 31 is opened, and the oil inlet and oil outlet of the first cartridge valve 311 are connected, the second cartridge valve 322 of the second switching valve 32 is also opened, and the oil inlet and oil outlet of the second cartridge valve 322 are connected, and the high-pressure oil flows into the first control valve group 1 and the second control valve group 2 through the first switching valve 31 and the second switching valve 32 of the third control valve group 3.

[0140] Among them, for the multiple propulsion cylinder groups 4 that need to be assembled in the control component 100 corresponding to the A partition, the oil inlet is controlled by at least part of the first control valve group 1, and the sixth reversing valve 13 is energized to control the hydraulic oil to enter the propulsion cylinder group 3.

[0141] For the propulsion cylinder group 4 that does not need to be assembled, the corresponding sixth reversing valve 13 is powered off, and the hydraulic oil will not enter the propulsion cylinder group 4 through the sixth reversing valve 13. At the same time, the reversing valve 212 of the second control valve group 2 is energized, and the hydraulic oil enters the propulsion cylinder group 4 through the reversing valve 212 after the pressure is adjusted by the proportional pressure reducing valve 211, thereby completing the proportional control of the pressure of each group of propulsion cylinders in the propulsion state.

[0142] That is to say, except for the multiple propulsion cylinder groups 4 that need to be assembled in area A, the other propulsion cylinder groups 4 are all precisely controlled by the proportional pressure reducing valve 211 of the second control valve group 2 according to the algorithm to continue to complete the propulsion action, and the retraction and segment assembly of the multiple propulsion cylinder groups 4 that need to be assembled in area A are controlled according to the conventional propulsion cylinder groups 4. Therefore, it can be ensured that during the retraction of the multiple propulsion cylinder groups 4 that need to be assembled in area A and the process of cooperating in the assembly of segments, the propulsion resultant force and action point of the remaining other propulsion cylinder groups 4 remain unchanged, and the posture of the shield remains unchanged, ensuring the smooth progress of synchronous pushing and assembly.

[0143] In summary, the shield construction control system provided by the embodiment of the present disclosure includes a push-and-assemble step-by-step mode and a push-and-assemble synchronous mode. The push-and-assemble step-by-step mode can be used when the advancement speed is high, and the push-and-assemble synchronous mode can be used when the advancement speed is low. The assembly process is integrated into the advancement process to improve construction efficiency.

[0144] The propulsion system in the related art generally also needs to be provided with a first control valve group 1 and an oil source 6. The embodiment of the present disclosure can add a second control valve group 2 to the propulsion system in the related art, so as to realize the function of synchronous pushing and pulling, and have a dual-mode propulsion effect, without requiring a major change to the original hydraulic system, and has high compatibility with the propulsion hydraulic system in the related art, facilitating the transformation of the propulsion hydraulic system in the related art into a dual-mode propulsion hydraulic system, so that it also has the function of synchronous pushing and pulling. At the same time, a third control valve group 3 can be added to the propulsion system in the related art to realize the switching of the two working modes.

[0145] Some embodiments further provide a shield machine, which includes the shield construction control system of any of the above embodiments.

[0146] The shield machine provided by the embodiment of the present disclosure includes the shield construction control system provided by the embodiment of the present disclosure, and correspondingly has the beneficial effects of the shield construction control system.

[0147] Based on the above-mentioned embodiments of the present invention, in the absence of explicit negation or conflict, the technical features of one embodiment may be beneficially combined with one or more other embodiments.

[0148] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A shield construction control system, characterized in that: The invention comprises a control component (100), wherein the control component (100) comprises: at least two propulsion cylinder groups (4); At least two first control valve groups (1) are connected to the at least two propulsion cylinder groups (4) in a one-to-one correspondence, and the first control valve groups (1) are configured to be operable to allow hydraulic oil to enter the corresponding propulsion cylinder groups (4); and a second control valve group (2), connected to each of the at least two propulsion cylinder groups (4), the second control valve group (2) being configured to operably allow hydraulic oil to enter the propulsion cylinder group (4) and to adjust the pressure of the hydraulic oil entering the propulsion cylinder group (4); Wherein, the shield construction control system includes a push-and-splice step-by-step mode and a push-and-splice synchronous mode; In the push-and-assemble step-by-step mode, the at least two propulsion cylinder groups (4) are configured so that the oil inlet is controlled by the at least two first control valve groups (1) so that each propulsion cylinder group (4) is extended to perform a propulsion operation, or each propulsion cylinder group (4) is retracted to form a space for segment assembly operations; In the push-and-segment synchronous mode, the at least two propulsion cylinder groups (4) are configured such that the first propulsion cylinder group (4) is controlled to flow oil by the second control valve group (2), and the pressure of each propulsion cylinder of the first propulsion cylinder group (4) is controlled by the second control valve group (2) so that the first propulsion cylinder group (4) is extended to perform a propulsion operation, and the second propulsion cylinder group (4) is controlled to flow oil by some of the first control valve groups (1) in the at least two first control valve groups (1) so that the second propulsion cylinder group (4) is retracted to form a space for segment assembly operations.

2. The shield construction control system according to claim 1, characterized in that: In the push-and-assemble step-by-step mode, the at least two first control valve groups (1) are configured to operably allow hydraulic oil to enter the rodless chambers of the at least two propulsion cylinder groups (4) so ​​that the at least two propulsion cylinder groups (4) extend to perform a propulsion operation, or to operably allow hydraulic oil to enter the rod chambers of the at least two propulsion cylinder groups (4) so ​​that the at least two propulsion cylinder groups (4) retract to form a space for performing segment assembly operations.

3. The shield construction control system according to claim 1 or 2, characterized in that: In the push-and-segment synchronization mode, the second control valve group (2) is configured to operably allow hydraulic oil to enter the rodless chamber of the first part of the propulsion cylinder group (4) so ​​that the first part of the propulsion cylinder group (4) is extended to perform a propulsion operation, and some of the first control valve groups (1) in the at least two first control valve groups (1) are configured to operably allow hydraulic oil to enter the rod chamber of the second part of the propulsion cylinder group (4) so ​​that the second part of the propulsion cylinder group (4) is retracted to form a space for performing segment assembly operations.

4. The shield construction control system according to claim 1, characterized in that: The second control valve group (2) comprises at least two pressure regulating valve groups (21), the at least two pressure regulating valve groups (21) being connected to the at least two propulsion cylinder groups (4) in a one-to-one correspondence, and each pressure regulating valve group (21) being configured to perform pressure regulation individually.

5. The shield construction control system according to claim 4, characterized in that: The pressure regulating valve group (21) comprises a proportional pressure reducing valve (211) and a reversing valve (212) connected in series, the proportional pressure reducing valve (211) being arranged upstream of the reversing valve (212), the reversing valve (212) comprising a first position and a second position, the reversing valve (212) being located at the first position, the oil circuit between the proportional pressure reducing valve (211) and the propulsion oil cylinder group (4) being disconnected, and the reversing valve (212) being located at the second position, the oil circuit between the proportional pressure reducing valve (211) and the propulsion oil cylinder group (4) being connected.

6. The shield construction control system according to claim 1, characterized in that: The control component (100) further comprises a pressure stabilizing valve group (5), wherein the pressure stabilizing valve group (5) is respectively connected to the at least two first control valve groups (1), and the pressure stabilizing valve group (5) is configured to regulate the pressure of the hydraulic oil to be stable and then send the pressure of the hydraulic oil to the at least two propulsion cylinder groups (4) through the at least two first control valve groups (1).

7. The shield construction control system according to claim 1, characterized in that: It also comprises an oil source (6) and a third control valve group (3), wherein an input end of the third control valve group (3) is connected to the oil source (6), and an output end of the third control valve group (3) is connected to the control component (100); In the push-pushing step-by-step mode, the third control valve group (3) is configured to deliver all the hydraulic oil provided by the oil source (6) to the at least two first control valve groups (1) in the control assembly (100); In the push-pushing synchronization mode, the third control valve group (3) is configured to deliver a portion of the hydraulic oil provided by the oil source (6) to the at least two first control valve groups (1) in the control component (100), and another portion of the hydraulic oil to the second control valve group (2) in the control component (100).

8. The shield construction control system according to claim 7, characterized in that: The third control valve group (3) comprises a first switching valve (31) and a second switching valve (32); In the push-pushing step-by-step mode, the first switching valve (31) is in operation, and the second switching valve (32) is in operation, so that all the hydraulic oil provided by the oil source (6) is delivered to the at least two first control valve groups (1) in the control assembly (100); In the push-pushing synchronous mode, both the first switching valve (31) and the second switching valve (32) operate so that a portion of the hydraulic oil provided by the oil source (6) is delivered to the at least two first control valve groups (1) in the control component (100), and another portion of the hydraulic oil is delivered to the second control valve group (2) in the control component (100).

9. The shield construction control system according to claim 8, characterized in that: The first switching valve (31) comprises a first cartridge valve (311) and a first reversing valve (312); the oil inlet of the first cartridge valve (311) is connected to the oil source (6); the oil outlet of the first cartridge valve (311) is connected to the at least two first control valve groups (1) in the control assembly (100); the first reversing valve (312) comprises a first working position and a second working position; when the first switching valve (31) is not working, the first reversing valve (312) is in the first working position, the oil path between the oil source (6) and the spring control end of the first cartridge valve (311) is connected, and the oil inlet and the oil outlet of the first cartridge valve (311) are disconnected; when the first switching valve (31) is working, the first reversing valve (312) is in the second working position, the oil path between the oil source (6) and the spring control end of the first cartridge valve (311) is disconnected, and the oil inlet and the oil outlet of the first cartridge valve (311) are connected.

10. The shield construction control system according to claim 8 or 9, characterized in that: The second switching valve (32) comprises a second cartridge valve (321) and a second reversing valve (322); the oil inlet of the second cartridge valve (321) is connected to the oil source (6); the oil outlet of the second cartridge valve (321) is connected to the second control valve group (2) in the control assembly (100); the second reversing valve (322) comprises a first working position and a second working position; when the second switching valve (32) is not working, the second reversing valve (322) is in the first working position, the oil path between the oil source (6) and the spring control end of the second cartridge valve (321) is connected, and the oil inlet and the oil outlet of the second cartridge valve (321) are disconnected; when the second switching valve (32) is working, the second reversing valve (322) is in the second working position, the oil path between the oil source (6) and the spring control end of the second cartridge valve (321) is disconnected, and the oil inlet and the oil outlet of the second cartridge valve (321) are connected.

11. The shield construction control system according to claim 1, characterized in that: The number of the control components (100) is at least two sets, and the at least two sets of control components (100) are configured to control shield construction operations in at least two partitions of the shield construction space.

12. The shield construction control system according to claim 11, characterized in that: In the push-and-assemble step-by-step mode, at least two sets of control components (100) are configured to simultaneously perform a push operation, and after reaching a preset stroke of the push cylinder group (4), each set of control components (100) is respectively and sequentially configured to control the corresponding push cylinder group (4) to retract, thereby forming a space for performing segment assembly operations; In the push-and-assemble synchronous mode, one of the at least two control assemblies (100) is configured to control the corresponding propulsion cylinder group (4) to retract, thereby forming a space for segment assembly operations, while the other control assemblies (100) are configured to continue the propulsion operations.

13. A control method for a shield construction control system as claimed in claim 1, characterized in that: The control method of the control component (100) in the push-pull step mode and the push-pull synchronization mode comprises the following steps: In the push-and-assemble step-by-step mode, the at least two first control valve groups (1) control the at least two propulsion oil cylinder groups (4) to supply oil, so that the at least two propulsion oil cylinder groups (4) extend to perform a propulsion operation; after reaching a preset stroke of the propulsion oil cylinder groups (4), the at least two first control valve groups (1) control the at least two propulsion oil cylinder groups (4) to supply oil, so that the at least two propulsion oil cylinder groups (4) retract to form a space for segment assembly operations; In the push-and-assemble synchronous mode, the at least two first control valve groups (1) control the oil supply of the at least two propulsion cylinder groups (4) so ​​that the at least two propulsion cylinder groups (4) extend to perform a push operation. When the stroke of the propulsion cylinder group (4) is greater than or equal to the width of the segment, the second control valve group (2) controls the oil supply of the first part of the propulsion cylinder group (4), so that the first part of the propulsion cylinder group (4) continues to extend to perform a push operation, and the pressure of the hydraulic oil entering the first part of the propulsion cylinder group (4) is adjusted by the second control valve group (2). At the same time, part of the first control valve group (1) controls the oil supply of the second part of the propulsion cylinder group (4) so ​​that the second part of the propulsion cylinder group (4) retracts to form a space for performing segment assembly operations.

14. The control method of the shield construction control system according to claim 13, characterized in that: The number of the control components (100) is at least two sets; In the push-and-assemble step-by-step mode, at least two sets of control components (100) are configured to simultaneously perform a push operation, and after reaching a preset stroke of the push cylinder group (4), each set of control components (100) is respectively and sequentially configured to control the corresponding push cylinder group (4) to retract, thereby forming a space for performing segment assembly operations; In the push-and-assemble synchronous mode, one of the at least two control assemblies (100) is configured to control the corresponding propulsion cylinder group (4) to retract, thereby forming a space for segment assembly operations, while the other control assemblies (100) are configured to continue the propulsion operations.

15. A shield machine, characterized in that: It comprises a shield construction control system as described in any one of claims 1 to 12.

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