Intelligent pressure maintaining system for shield machine

Abstract

The application discloses a shield machine pneumatic intelligent pressure maintaining system, and relates to the technical field of shield equipment.The shield machine pneumatic intelligent pressure maintaining system comprises a general control device, a pressure maintaining bin, a first pressure maintaining circuit, a second pressure maintaining circuit, a double-gas-control reversing valve and a gas supply device.The pressure maintaining bin is connected with the general control device.The bin pressure setting assembly in the first pressure maintaining circuit is connected with the general control device and an adjusting operation device respectively, the air intake and exhaust adjusting assembly is connected with the pressure maintaining bin, the adjusting operation device is connected with the bin pressure setting assembly and the air intake and exhaust adjusting assembly respectively, and the air pressure pressure transmitting device is connected with the pressure maintaining bin, the adjusting operation device and the general control device respectively.The second pressure maintaining circuit is connected with the general control device and the pressure maintaining bin respectively.The double-gas-control reversing valve is connected with the first pressure maintaining circuit, the second pressure maintaining circuit and the general control device respectively.The gas supply device is connected with the double-gas-control reversing valve.The application improves the information intercommunication between the pressure maintaining circuit of the shield machine and the general control device and the automation degree of the shield machine pneumatic pressure maintaining system.

Description

Technical Field

[0001] This application relates to the field of tunnel boring machine (TBM) technology, and in particular to a pneumatic intelligent pressure-maintaining system for a TBM. Background Technology

[0002] In related technologies, the pressure-maintaining method of the main control unit of the tunnel boring machine pressure-maintaining system is as follows: the pressure inside the pressure chamber of the tunnel boring machine is transmitted to the central control room through an air-electric pressure transmitter. Under the monitoring of the central control room, the pressure inside the chamber is transmitted to the regulating calculator through an air-to-air pressure transmitter. The regulating calculator can set the pressure value inside the chamber locally, compare it with the actual chamber pressure, and then send the control pressure to the inlet regulating valve and the exhaust regulating valve to control the pressure inside the pressure chamber of the tunnel boring machine, and finally achieve the effect of regulating the pressure inside the pressure chamber.

[0003] However, in this type of tunnel boring machine pressure-maintaining system, the central control device can only monitor the pressure changes in the pressure chamber of the tunnel boring machine. If it is necessary to change its control pressure, it is necessary to manually operate it on-site, which cannot be controlled in a timely manner from the central control room. The central control room is also unable to make comprehensive and accurate judgments and responses due to the limited on-site monitoring information of the pressure-maintaining system. When a component of one of the pressure-maintaining circuits fails, it can only be manually switched to another pressure-maintaining circuit on-site, which is not timely or convenient. When switching between two pressure-maintaining circuits on-site, the air supply to different components must be cut off by opening and closing several sets of manual valves to make them lose or restore their functions, which is a cumbersome and error-prone process. Summary of the Invention

[0004] The intelligent pneumatic pressure-maintaining system for tunnel boring machines (TBMs) improves the information exchange between the pressure-maintaining circuit and the main control device, further enhancing the automation level of the TBM's pneumatic pressure-maintaining system.

[0005] This application provides a pneumatic intelligent pressure-maintaining system for tunnel boring machines, including: Central control unit; A pressure-holding chamber, which is connected to the central control device; The first pressure-holding circuit includes a chamber pressure setting component, an intake and exhaust regulating component, a regulating calculation device, and a pressure transmitter. The chamber pressure setting component is connected to the main control device and the regulating calculation device, respectively. The main control device controls the chamber pressure setting component to increase or decrease the preset chamber pressure value of the pressure-holding chamber. The intake and exhaust regulating component is connected to the pressure-holding chamber. The regulating calculation device is connected to the chamber pressure setting component and the intake and exhaust regulating component, respectively. The pressure transmitter is connected to the pressure-holding chamber, the regulating calculation device, and the main control device, respectively. The pressure transmitter determines the current pressure value of the pressure-holding chamber and outputs the current pressure value to the regulating calculation device and the main control device, so that the regulating calculation device controls the intake and exhaust regulating component to replenish or exhaust air from the pressure-holding chamber according to the current pressure value. The second pressure holding circuit is connected to the main control device and the pressure holding chamber respectively; A dual pneumatically controlled directional valve, wherein the dual pneumatically controlled directional valve is respectively connected to the first pressure holding circuit, the second pressure holding circuit, and the main control device; An air supply device is provided, which is connected to the dual air-controlled directional valve. The main control device is also used to control the air supply device to supply air to the first pressure-holding circuit through the dual air-controlled directional valve to drive the first pressure-holding circuit into a working state, or to control the air supply device to supply air to the second pressure-holding circuit through the dual air-controlled directional valve to drive the second pressure-holding circuit into a working state.

[0006] The pneumatic intelligent pressure-maintaining system for tunnel boring machines according to the embodiments of this application has at least the following beneficial effects: The main control device controls the pressure setting component to increase or decrease the preset pressure value of the pressure-maintaining chamber, thereby enabling the main control device to remotely set the preset pressure value; the air pressure transmitter is used to determine the current pressure value of the pressure-maintaining chamber and outputs the current pressure value to the regulating calculation device and the main control device respectively, so that the regulating calculation device controls the air intake and exhaust regulating components to replenish or exhaust air into the pressure-maintaining chamber according to the current pressure value; the air pressure transmitter is also used to transmit the pressure value of the pressure-maintaining chamber after replenishment or exhaust. The current pressure value is output to the central control unit, enabling the current pressure-holding circuit to maintain pressure in the pressure chamber. The central control unit also controls the air supply device to supply air to the first pressure-holding circuit via a dual-pneumatic directional valve, driving the first pressure-holding circuit into operation, or to supply air to the second pressure-holding circuit via the same dual-pneumatic directional valve, driving the second pressure-holding circuit into operation. The dual-pneumatic directional valve controls the air supply device to switch between main pipeline air supply and no air supply for the first and second pressure-holding circuits, thereby switching between the first and second pressure-holding circuits for maintaining pressure in the pressure chamber. This configuration improves information exchange between the tunnel boring machine's pressure-holding circuit and the central control unit, further enhancing the automation level of the tunnel boring machine's pneumatic pressure-holding system and reducing labor costs.

[0007] According to some embodiments of this application, the chamber pressure setting component includes a first pneumatic button, a second pneumatic button, a pulse pressure regulator, and a first pneumatic-electric pressure transmitter. One end of the pulse pressure regulator is connected to the first pneumatic button and the second pneumatic button, respectively, and the other end of the pulse pressure regulator is connected to the adjustment calculation device and the first pneumatic-electric pressure transmitter, respectively. The first pneumatic-electric pressure transmitter is connected to the main control device. The pulse pressure regulator is used to increase or decrease the preset value of the chamber pressure of the pressure-holding chamber to obtain the current chamber pressure setting value, and transmits the current chamber pressure setting value to the main control device through the first pneumatic-electric pressure transmitter.

[0008] According to some embodiments of this application, the chamber pressure setting component further includes a first electrical converter and a second electrical converter. The first electrical converter is connected to the pulse pressure regulator and the main control device, respectively. The second electrical converter is connected to the pulse pressure regulator and the main control device, respectively. The main control device is further configured to control the pulse pressure regulator to increase or decrease the chamber pressure preset value of the pressure holding chamber through the first electrical converter and the second electrical converter to obtain the current chamber pressure setting value, and to transmit the current chamber pressure setting value to the main control device through the first pneumatic and electrical pressure transmitter.

[0009] According to some embodiments of this application, the chamber pressure setting component further includes a multi-channel selection reversing component and a first pneumatic-electric converter. The first pneumatic-electric converter is connected to the multi-channel selection reversing component and the main control device, respectively. The multi-channel selection reversing component is selectively connected to the first pneumatic button, the second pneumatic button, the first electrical converter, and the second electrical converter, respectively. The multi-channel selection reversing component is used to select whether to drive the pulse pressure regulator to increase or decrease the chamber pressure preset value of the pressure holding chamber through the first pneumatic button and the second pneumatic button, or to select whether to drive the pulse pressure regulator to increase or decrease the chamber pressure preset value of the pressure holding chamber through the first electrical converter and the second electrical converter.

[0010] According to some embodiments of this application, the intake and exhaust regulating assembly includes an intake regulating mechanism and an exhaust regulating mechanism. The first pressure holding circuit further includes an air source input pipeline. The intake regulating mechanism is connected to the pressure holding chamber, the regulating calculation device, the dual air-controlled reversing valve, and the air source input pipeline, respectively. The exhaust regulating mechanism is connected to the pressure holding chamber, the regulating calculation device, and the dual air-controlled reversing valve, respectively.

[0011] According to some embodiments of this application, the first pressure holding circuit further includes a single-path pneumatic control directional valve and a setpoint pressure reducing valve. The single-path pneumatic control directional valve is selectively connected to the regulating calculation device and the setpoint pressure reducing valve, respectively. The single-path pneumatic control directional valve is also connected to the dual pneumatic control directional valve, the intake regulating mechanism, and the exhaust regulating mechanism, respectively.

[0012] According to some embodiments of this application, the shield machine pneumatic intelligent pressure-maintaining system further includes an alarm device. The first pressure-maintaining circuit further includes a pressure monitoring mechanism, a fault indicator light, an audible alarm, a third electrical converter, and a second pneumatic-electric converter. One end of the pressure monitoring mechanism is connected to the first pressure-maintaining circuit, and the other end of the pressure monitoring mechanism is connected to the alarm device. The alarm device is connected to the fault indicator light, the audible alarm, the second pneumatic-electric converter, and the third electrical converter, respectively. The second pneumatic-electric converter is also connected to the fault indicator light and the main control device, and the third electrical converter is also connected to the main control device.

[0013] According to some embodiments of this application, the tunnel boring machine pneumatic intelligent pressure-maintaining system further includes a third pneumatic button, which is connected to the alarm device and is used to turn off the warning signal of the audible alarm.

[0014] According to some embodiments of this application, the first pressure holding circuit further includes a fourth pneumatic button and a fourth electrical converter. One end of the fourth pneumatic button is connected to the dual pneumatic directional valve, and the other end of the fourth pneumatic button is connected to the main control device through the fourth electrical converter. The fourth pneumatic button is used to control whether the dual pneumatic directional valve is connected to the first pressure holding circuit.

[0015] According to some embodiments of this application, the shield machine pneumatic intelligent pressure-maintaining system further includes an integrated control cabinet, in which the main control device, the chamber pressure setting component, the air intake and exhaust regulating component, the regulating calculation device, the second pressure-maintaining circuit, the dual pneumatic reversing valve, and the air supply device are all located.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] Additional aspects and advantages of this application will become apparent and readily understood in conjunction with the following description of the embodiments, in which: Figure 1 A schematic diagram of the structure of the intelligent pneumatic pressure-maintaining system for tunnel boring machines provided in the embodiments of this application; Figure 2 A schematic diagram of the pressure-maintaining system for tunnel boring machines provided in the prior art; Figure 3 A front view of the integrated control cabinet provided for an embodiment of this application; Figure 4 A schematic diagram of the internal structure of the integrated control cabinet provided for an embodiment of this application; Figure 5 A side view of the integrated control cabinet provided for an embodiment of this application; Figure 6 This is a schematic diagram of another side of the integrated control cabinet provided for an embodiment of this application.

[0018] Figure label: Pressure holding chamber 110, main control device 111, air intake regulating mechanism 112, exhaust regulating mechanism 113, air source input pipeline 114, second air and electricity pressure transmitter 116, air source pressure reducing valve 117; Adjustment and calculation device 120, single-channel pneumatic control directional valve 121, fixed value pressure reducing valve 122, operation indicator 123, third pneumatic and electric pressure transmitter 124, pneumatic pressure transmitter 125; Pulse pressure regulator 130, first pneumatic button 131, second pneumatic button 132, first pneumatic-electric pressure transmitter 133, multi-channel selection reversing assembly 134, first pneumatic-electric converter 135, first electrical converter 136, second electrical converter 137; Operating status indicator light 140; Third pneumatic-electric converter 141; Dual pneumatic reversing valve 150, air supply device 151, fourth pneumatic button 152, fourth electrical converter 153; Alarm device 160, air pressure monitoring mechanism 161, fault indicator light 162, sound alarm component 163, third electrical converter 164, second pneumatic-electric converter 165, third pneumatic button 166; Integrated control cabinet 170, gas line interface 171. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0020] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0022] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0023] Reference Figure 2In the relevant technology, the pressure-maintaining method of the shield machine pressure-maintaining system main control unit 215 is as follows: an air intake regulating valve 211 and an exhaust regulating valve 212 are connected to the outside of the pressure-maintaining chamber 210. When the pressure inside the pressure-maintaining chamber 210 is lower than the set value, the air source replenishes the pressure-maintaining chamber 210 through the air intake regulating valve 211; when the pressure inside the pressure-maintaining chamber 210 is higher than the set value, the exhaust is discharged to the outside through the exhaust regulating valve 212. The pressure inside the shield machine pressure-maintaining chamber 210 is transmitted to the central control room 217 through the pneumatic-electric pressure transmitter 213. Under the monitoring of the central control room 217, the pressure inside the chamber is transmitted to the regulating calculator 216 through the pneumatic-pneumatic pressure transmitter 214. The regulating calculator 216 can set the pressure value inside the chamber locally, compare it with the actual chamber pressure, and then send the control pressure to the air intake regulating valve 211 and the exhaust regulating valve 212 to control the pressure inside the shield machine pressure-maintaining chamber 210, ultimately achieving the effect of regulating the pressure inside the pressure-maintaining chamber.

[0024] However, in this type of tunnel boring machine pressure-maintaining system, the central control device can only monitor the pressure changes in the pressure-maintaining chamber 210 of the tunnel boring machine. If it is necessary to change its control pressure, it is necessary to manually operate it on-site. It is impossible to control it in a timely manner from the central control room 217. The central control room 217 is also unable to make comprehensive and accurate judgments and responses due to the limited on-site monitoring information of the pressure-maintaining system. When a component of one of the pressure-maintaining circuits fails, it can only be manually switched to another pressure-maintaining circuit on-site, which is not timely or convenient. When switching between two pressure-maintaining circuits on-site, the air supply to different components must be cut off by opening and closing several sets of manual valves to make them lose or restore their functions. The process is cumbersome and prone to errors.

[0025] To address the aforementioned problems, this application proposes a pneumatic intelligent pressure-maintaining system for tunnel boring machines. The embodiments of this application will be further described below with reference to the accompanying drawings.

[0026] Reference Figure 1This application provides a pneumatic intelligent pressure-maintaining system for a tunnel boring machine, including a central control unit 111, a pressure-maintaining chamber 110, a first pressure-maintaining circuit, a second pressure-maintaining circuit, a dual pneumatic control directional valve 150, and an air supply device 151. The pressure-maintaining chamber 110 is connected to the central control unit 111. The first pressure-maintaining circuit includes a chamber pressure setting component, an air intake and exhaust regulating component, a regulating calculation device 120, and a pressure transmitter 125. The chamber pressure setting component is connected to the central control unit 111 and the regulating calculation device 120, respectively. The central control unit 111 is used to control the chamber pressure setting component to increase or decrease the preset pressure value of the pressure-maintaining chamber 110. The air intake and exhaust regulating component is connected to the pressure-maintaining chamber 110. The regulating calculation device 120 is connected to the chamber pressure setting component and the air intake and exhaust regulating component, respectively. The pressure transmitter 125 is connected to the pressure-maintaining chamber 110, the regulating calculation device 120, and the central control unit 111, respectively. Next, the air pressure transmitter 125 is used to determine the current pressure value of the pressure holding chamber 110, and outputs the current pressure value to the regulating calculation device 120 and the main control device 111 respectively, so that the regulating calculation device 120 controls the air intake and exhaust regulating components to replenish air or exhaust air to the pressure holding chamber 110 according to the current pressure value; the second pressure holding circuit is connected to the main control device 111 and the pressure holding chamber 110 respectively; the dual air-controlled directional valve 150 is connected to the first pressure holding circuit, the second pressure holding circuit and the main control device 111 respectively; the air supply device 151 is connected to the dual air-controlled directional valve 150, and the main control device 111 is also used to control the air supply device 151 to supply air to the first pressure holding circuit through the dual air-controlled directional valve 150 to drive the first pressure holding circuit into the working state, or to control the air supply device 151 to supply air to the second pressure holding circuit through the dual air-controlled directional valve 150 to drive the second pressure holding circuit into the working state.

[0027] In some embodiments, the first pressure holding circuit further includes a second pneumatic pressure transmitter 116 and a third pneumatic pressure transmitter 124. One end of the second pneumatic pressure transmitter 116 is connected to the pressure holding chamber 110, and the other end of the second pneumatic pressure transmitter 116 is connected to the main control device 111. One end of the third pneumatic pressure transmitter 124 is connected to the pneumatic pressure transmitter 125 and the regulating calculation device 120, respectively, and the other end of the third pneumatic pressure transmitter 124 is connected to the main control device 111.

[0028] It should be noted that the pneumatic intelligent pressure-maintaining system for tunnel boring machines (TBMs) of this application is applied to slurry TBMs; in other embodiments, the pneumatic intelligent pressure-maintaining system for TBMs can also be applied to other TBMs, and this application does not limit the application in this regard.

[0029] It should be noted that there are two pressure holding circuits, namely the first pressure holding circuit and the second pressure holding circuit. The two pressure holding circuits are symmetrically arranged on both sides of the air supply device 151 and the alarm device 160. The number of the pressure setting component, the air intake and exhaust adjustment component, the adjustment calculation device 120 and the air pressure transmitter 125 corresponds to the number of pressure holding circuits.

[0030] Compared with related technologies, this application adds the connection between the central control device 111 and the first and second pressure-holding circuits without reducing the original information points between the central control room and the pressure-holding system. This allows the first and second pressure-holding circuits to be remotely controlled by the central control device 111, providing the central control device 111 with more information and enhancing the automation level and ease of operation of the tunnel boring machine pneumatic intelligent pressure-holding system.

[0031] It should be noted that the air pressure transmitter 125 is a pneumatic-to-pneumatic pressure transmitter, and the central control device 111 is the central control room. The air pressure transmitter 125 detects the current pressure value in the pressure holding chamber 110 and transmits the current pressure value to the regulating calculation device 120. The regulating calculation device 120 receives the current pressure value and performs proportional-integral calculation based on the current pressure value and the chamber pressure preset value to generate a command control signal. The command control signal is then sent to the air intake and exhaust regulating component. The air intake and exhaust regulating component receives the command control signal and performs air replenishment or exhaust operations on the pressure holding chamber 110 according to the command control signal to achieve automatic pressure holding of the pressure holding chamber 110. The air pressure transmitter transmits the transmitted current pressure value to the central control device 111.

[0032] It should be noted that the warehouse pressure setting component can be set locally and the status information of the first pressure holding circuit can be fed back to the main control device 111. Alternatively, the warehouse pressure setting component can also be remotely sent to the warehouse pressure setting component via the main control device 111. The warehouse pressure setting component will then increase or decrease the preset warehouse pressure value according to the warehouse pressure setting command, and send the modified preset warehouse pressure value to the adjustment calculation device 120.

[0033] It should be noted that the main control device 111 sends a circuit switching command to the dual pneumatic reversing valve 150. The dual pneumatic reversing valve 150 controls the air supply device 151 to supply air to the first pressure holding circuit or the second pressure holding circuit according to the circuit switching command, so as to drive the first pressure holding circuit to enter the working state and the second pressure holding circuit to stop supplying air and enter the standby state; or drive to stop supplying air to the first pressure holding circuit and switch to supplying air to the second pressure holding circuit, so that the second pressure holding circuit enters the working state and maintains pressure in the pressure holding chamber 110.

[0034] It should be noted that during the tunnel boring machine's (TBM) excavation process, changes in the distance between the excavation face and the ground, as well as variations in soil conditions, cause pressure changes at the excavation face. To prevent ground collapse or roof fall, the pressure in the pressure-maintaining chamber 110 needs to adjust in real time to balance the pressure at the excavation face. Therefore, the pressure-maintaining system is a crucial component of the TBM and a vital factor in ensuring its normal operation. Consequently, the pressure-maintaining system contains two sets of pressure-maintaining component circuits, one for backup and one for standby. When one circuit fails, it must quickly switch to the other circuit to ensure uninterrupted operation of the TBM and facilitate maintenance and repair.

[0035] In this application, the main control device 111 controls the pressure setting component to increase or decrease the preset pressure value of the pressure holding chamber 110, thereby enabling the main control device 111 to remotely set the preset pressure value. The air pressure transmitter 125 is used to determine the current pressure value of the pressure holding chamber 110 and outputs the current pressure value to the regulating calculation device 120 and the main control device 111 respectively, so that the regulating calculation device 120 controls the air intake and exhaust regulating components to replenish or exhaust air into the pressure holding chamber 110 according to the current pressure value. The air pressure transmitter 125 is also used to output the current pressure value of the pressure holding chamber 110 after replenishment or exhaust to the main control device. 111 enables the current pressure-holding circuit to maintain pressure in the pressure chamber 110. The main control device 111 also controls the air supply device 151 to supply air to the first pressure-holding circuit via a dual pneumatic directional valve 150 to drive the first pressure-holding circuit into operation, or to supply air to the second pressure-holding circuit via the dual pneumatic directional valve 150 to drive the second pressure-holding circuit into operation. The dual pneumatic directional valve 150 controls the air supply device 151 to switch between main pipeline air supply and no air supply for the first and second pressure-holding circuits, thereby switching between the first and second pressure-holding circuits for maintaining pressure in the pressure chamber 110. This configuration improves information exchange between the tunnel boring machine's pressure-holding circuit and the main control device 111, further enhancing the automation level of the tunnel boring machine's pneumatic pressure-holding system and reducing labor costs.

[0036] Reference Figure 1 , Figures 3 to 4 It is understood that the chamber pressure setting component includes a first pneumatic button 131, a second pneumatic button 132, a pulse pressure regulator 130, and a first pneumatic-electric pressure transmitter 133. One end of the pulse pressure regulator 130 is connected to the first pneumatic button 131 and the second pneumatic button 132 respectively, and the other end of the pulse pressure regulator 130 is connected to the adjustment calculation device 120 and the first pneumatic-electric pressure transmitter 133 respectively. The first pneumatic-electric pressure transmitter 133 is connected to the main control device 111. The pulse pressure regulator 130 is used to increase or decrease the chamber pressure preset value of the pressure holding chamber 110 to obtain the current chamber pressure setting value, and transmits the current chamber pressure setting value to the main control device 111 through the first pneumatic-electric pressure transmitter 133.

[0037] It should be noted that by pressing the first pneumatic button 131 and the second pneumatic button 132, the pulse pressure regulator 130 is controlled to increase or decrease the preset value of the pressure holding chamber 110 to obtain the current pressure setting value. The current pressure setting value is then sent to the adjustment calculation device 120 and transmitted to the main control device 111 through the first pneumatic pressure transmitter 133, thereby realizing the local setting of the preset value of the pressure holding chamber 110.

[0038] Reference Figure 1 and Figure 4 It is understood that the pressure setting component also includes a first electrical converter 136 and a second electrical converter 137. The first electrical converter 136 is connected to the pulse pressure regulator 130 and the main control device 111, respectively. The second electrical converter 137 is connected to the pulse pressure regulator 130 and the main control device 111, respectively. The main control device 111 is also used to control the pulse pressure regulator 130 to increase or decrease the preset pressure value of the pressure holding chamber 110 through the first electrical converter 136 and the second electrical converter 137 to obtain the current pressure setting value, and to transmit the current pressure setting value to the main control device 111 through the first pneumatic and electrical pressure transmitter 133.

[0039] It should be noted that the main control device 111 remotely sends a pressure setting command to the pulse pressure regulator 130 via the first electrical converter 136 and the second electrical converter 137. The pulse pressure regulator 130 increases or decreases the preset pressure value of the pressure holding chamber 110 according to the pressure setting command to obtain the current pressure setting value, and transmits the current pressure setting value to the adjustment calculation device 120, and transmits it to the main control device 111 via the first pneumatic and electrical pressure transmitter 133, so as to realize the setting of the preset pressure value of the pressure holding chamber 110 remotely by the main control device 111.

[0040] Reference Figure 1 It is understood that the pressure setting component also includes a multi-channel selection reversing component 134 and a first pneumatic-electric converter 135. The first pneumatic-electric converter 135 is connected to the multi-channel selection reversing component 134 and the main control device 111. The multi-channel selection reversing component 134 is selectively connected to the first pneumatic button 131, the second pneumatic button 132, the first electrical converter 136, and the second electrical converter 137. The multi-channel selection reversing component 134 is used to select whether to increase or decrease the pressure preset value of the pressure holding chamber 110 by driving the pulse pressure regulator 130 through the first pneumatic button 131 and the second pneumatic button 132, or to select whether to increase or decrease the pressure preset value of the pressure holding chamber 110 by driving the pulse pressure regulator 130 through the first electrical converter 136 and the second electrical converter 137.

[0041] It should be noted that the preset value of the chamber pressure can be set locally or remotely through the central control device 111 by setting the multi-channel selection reversing component 134, and the status information of the current circuit is fed back to the central control device 111 through the first gas-electric converter 135.

[0042] Reference Figure 1 It is understood that the intake and exhaust regulating components include an intake regulating mechanism 112 and an exhaust regulating mechanism 113. The first pressure holding circuit also includes an air source input pipeline 114. The intake regulating mechanism 112 is connected to the pressure holding chamber 110, the regulating calculation device 120, the dual air-controlled reversing valve 150, and the air source input pipeline 114, respectively. The exhaust regulating mechanism 113 is connected to the pressure holding chamber 110, the regulating calculation device 120, and the dual air-controlled reversing valve 150, respectively.

[0043] It should be noted that an air pressure reducing valve 117 is installed on the air source input pipeline 114. The air source replenishes the pressure holding chamber 110 through the air intake regulating mechanism 112. When the current pressure value in the pressure holding chamber 110 is higher than the set value, the air is exhausted to the outside through the exhaust regulating mechanism 113.

[0044] Reference Figure 1 , Figure 4 It is understandable that the first pressure holding circuit also includes a single-path pneumatic control directional valve 121 and a fixed-value pressure reducing valve 122. The single-path pneumatic control directional valve is selectively connected to the regulating calculation device 120 and the fixed-value pressure reducing valve 122 respectively. The single-path pneumatic control directional valve is also connected to the dual pneumatic control directional valve 150, the intake regulating mechanism 112, and the exhaust regulating mechanism 113 respectively.

[0045] It should be noted that when the first pressure holding circuit is in operation, the single-path pneumatic control directional valve 121 switches the pneumatic path to the output of the regulating calculation device 120; otherwise, it switches to the output of the set value pressure reducing valve 122.

[0046] It should be noted that when the pressure holding operation of the pressure holding chamber 110 is switched to the first pressure holding circuit, the working status indicator light 140 of the first pressure holding circuit is lit, and the working status of the first pressure holding circuit is sent to the main control device 111 via the third pneumatic-electric converter 141. At the same time, the single-path pneumatic control directional valve 121 switches the air path to the output port of the regulating calculation device 120, and the single-path pneumatic control directional valve 121 of the second pressure holding circuit switches the air path to the output port of the set value pressure reducing valve 122. At this time, the signals of the intake regulating mechanism 112 and the exhaust regulating mechanism 113 of the second pressure holding circuit are determined by the set value pressure reducing valve 122 to ensure that the valves are all in the closed state, thereby realizing one-button switching.

[0047] Reference Figure 1 , Figures 3 to 4It is understandable that the shield machine's pneumatic intelligent pressure-maintaining system also includes an alarm device 160. The first pressure-maintaining circuit also includes a pressure monitoring mechanism 161, a fault indicator light 162, an audible alarm 163, a third electrical converter 164, and a second pneumatic-electric converter 165. One end of the pressure monitoring mechanism 161 is connected to the first pressure-maintaining circuit, and the other end of the pressure monitoring mechanism 161 is connected to the alarm device 160. The alarm device 160 is connected to the fault indicator light 162, the audible alarm 163, the second pneumatic-electric converter 165, and the third electrical converter 164. The second pneumatic-electric converter 165 is also connected to the fault indicator light 162 and the main control device 111, and the third electrical converter 164 is also connected to the main control device 111.

[0048] It should be noted that the air pressure monitoring mechanism 161 monitors the air source pressure of the first pressure holding circuit in real time. When the air source pressure is too low, the alarm device 160 illuminates the fault indicator light 162 of the first pressure holding circuit and sends an alarm message to the central control device 111 through the second gas-electric converter 165. The sound alarm device 163 provides an audible alarm indication on site. When the alarm occurs, the sound alarm can be cleared by receiving the instruction from the central control device 111 through the third electrical converter 164, which facilitates on-site personnel to troubleshoot the fault.

[0049] Reference Figure 1 and Figure 3 It is understandable that the tunnel boring machine pneumatic intelligent pressure maintenance system also includes a third pneumatic button 166, which is connected to the alarm device 160. The third pneumatic button 166 is used to turn off the warning signal of the audible alarm device 163.

[0050] It should be noted that by setting the third pneumatic button 166, staff can clear the audible alarm on-site, making it easier for on-site personnel to troubleshoot the fault.

[0051] Reference Figure 1 , Figures 3 to 4 It is understood that the first pressure holding circuit also includes a fourth pneumatic button 152 and a fourth electrical converter 153. One end of the fourth pneumatic button 152 is connected to the dual pneumatic directional valve 150, and the other end of the fourth pneumatic button 152 is connected to the main control device 111 through the fourth electrical converter 153. The fourth pneumatic button 152 is used to control whether the dual pneumatic directional valve 150 is connected to the first pressure holding circuit.

[0052] It should be noted that by pressing the fourth pneumatic button 152, the first pressure holding circuit can be put into working state and the second pressure holding circuit can be put into standby state locally. The pulse signal of the representative circuit switching command from the main control device 111 is received by the fourth electrical converter 153 and sent to the dual pneumatic reversing valve 150 to realize the remote switching of the pressure holding circuit.

[0053] Reference Figure 1 , Figures 3 to 6 It is understandable that the shield machine pneumatic intelligent pressure holding system also includes an integrated control cabinet 170, in which the main control device 111, pressure setting component, air intake and exhaust adjustment component, adjustment calculation device 120, second pressure holding circuit, dual pneumatic control reversing valve 150 and air supply device 151 are all located.

[0054] It should be noted that the first pressure holding circuit also includes an operation indicator 123. One end of the operation indicator 123 is connected to the regulating calculation device 120 and the gas pressure transmitter, respectively, and the other end of the operation indicator 123 is connected to the pulse pressure regulator 130. The operation indicator 123 is used to display the current chamber pressure preset value and the actual current pressure value.

[0055] It should be noted that there are two pressure holding circuits: a first pressure holding circuit and a second pressure holding circuit. The number of the following components corresponds to the number of pressure holding circuits: adjustment and calculation device 120, first pneumatic button 131, second pneumatic button 132, pulse pressure regulator 130, first pneumatic-electric pressure transmitter 133, first electrical converter 136, second electrical converter 137, multi-channel selection reversing assembly 134, first pneumatic-electric converter 135, single-channel pneumatic control reversing valve 121, setpoint pressure reducing valve 122, air pressure monitoring mechanism 161, fault indicator light 162, audible alarm 163, third electrical converter 164, second pneumatic-electric converter 165, fourth pneumatic button 152, fourth electrical converter 153, air pressure transmitter 125, intake regulating mechanism 112, exhaust regulating mechanism 113, air source pressure reducing valve 117, and air source input pipeline 114.

[0056] Specifically, the system includes a dual pneumatic directional valve 150, a pneumatic supply device 151, an alarm device 160, a third pneumatic button 166, a regulating and calculating device 120 in the first pressure-holding circuit, a first pneumatic button 131, a second pneumatic button 132, a pulse pressure regulator 130, a first pneumatic-electric pressure transmitter 133, a first electrical converter 136, a second electrical converter 137, a multi-channel selection directional assembly 134, a first pneumatic-electric converter 135, a single-channel pneumatic directional valve 121, and a setpoint pressure reducing valve 122. The air pressure monitoring mechanism 161, fault indicator light 162, audible alarm 163, third electrical converter 164, second pneumatic-electric converter 165, fourth pneumatic button 152, fourth electrical converter 153, and the devices in the second pressure holding circuit corresponding to the first pressure holding circuit are integrated into an integrated control cabinet 170. The external air circuit and electrical air circuit interface 171 are uniformly set at the bottom of the integrated control cabinet 170 (bottom inlet and bottom outlet) to achieve intelligent pressure holding and facilitate on-site installation and operation.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

[0059] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A pneumatic intelligent pressure-maintaining system for a tunnel boring machine, characterized in that, include: Central control unit; A pressure-holding chamber, which is connected to the central control device; The first pressure-holding circuit includes a chamber pressure setting component, an intake and exhaust regulating component, a regulating calculation device, and a pressure transmitter. The chamber pressure setting component is connected to the main control device and the regulating calculation device, respectively. The main control device controls the chamber pressure setting component to increase or decrease the preset chamber pressure value of the pressure-holding chamber. The intake and exhaust regulating component is connected to the pressure-holding chamber. The regulating calculation device is connected to the chamber pressure setting component and the intake and exhaust regulating component, respectively. The pressure transmitter is connected to the pressure-holding chamber, the regulating calculation device, and the main control device, respectively. The pressure transmitter determines the current pressure value of the pressure-holding chamber and outputs the current pressure value to the regulating calculation device and the main control device, so that the regulating calculation device controls the intake and exhaust regulating component to replenish or exhaust air from the pressure-holding chamber according to the current pressure value. The second pressure holding circuit is connected to the main control device and the pressure holding chamber respectively; A dual pneumatically controlled directional valve, wherein the dual pneumatically controlled directional valve is respectively connected to the first pressure holding circuit, the second pressure holding circuit, and the main control device; An air supply device is connected to the dual air-controlled reversing valve. The main control device is also used to control the air supply device to supply air to the first pressure-holding circuit through the dual air-controlled reversing valve to drive the first pressure-holding circuit into a working state, or to control the air supply device to supply air to the second pressure-holding circuit through the dual air-controlled reversing valve to drive the second pressure-holding circuit into a working state. The intake and exhaust regulating assembly includes an intake regulating mechanism and an exhaust regulating mechanism. The first pressure holding circuit also includes an air source input pipeline. The intake regulating mechanism is connected to the pressure holding chamber, the regulating calculation device, the dual air-controlled reversing valve, and the air source input pipeline, respectively. The exhaust regulating mechanism is connected to the pressure holding chamber, the regulating calculation device, and the dual air-controlled reversing valve, respectively. The first pressure holding circuit also includes a single-path pneumatic control directional valve and a setpoint pressure reducing valve. The single-path pneumatic control directional valve is selectively connected to the regulating calculation device and the setpoint pressure reducing valve, respectively. The single-path pneumatic control directional valve is also connected to the dual pneumatic control directional valve, the intake regulating mechanism, and the exhaust regulating mechanism, respectively.

2. The pneumatic intelligent pressure-maintaining system for tunnel boring machines according to claim 1, characterized in that, The chamber pressure setting component includes a first pneumatic button, a second pneumatic button, a pulse pressure regulator, and a first pneumatic-electric pressure transmitter. One end of the pulse pressure regulator is connected to the first pneumatic button and the second pneumatic button, respectively, and the other end of the pulse pressure regulator is connected to the adjustment calculation device and the first pneumatic-electric pressure transmitter, respectively. The first pneumatic-electric pressure transmitter is connected to the main control device. The pulse pressure regulator is used to increase or decrease the preset value of the chamber pressure of the pressure holding chamber to obtain the current chamber pressure setting value, and transmits the current chamber pressure setting value to the main control device through the first pneumatic-electric pressure transmitter.

3. The pneumatic intelligent pressure-maintaining system for tunnel boring machines according to claim 2, characterized in that, The pressure setting component further includes a first electrical converter and a second electrical converter. The first electrical converter is connected to the pulse pressure regulator and the main control device, respectively. The second electrical converter is connected to the pulse pressure regulator and the main control device, respectively. The main control device is also used to control the pulse pressure regulator to increase or decrease the preset pressure value of the pressure holding chamber through the first electrical converter and the second electrical converter to obtain the current pressure setting value, and to transmit the current pressure setting value to the main control device through the first pneumatic and electrical pressure transmitter.

4. The pneumatic intelligent pressure-maintaining system for tunnel boring machines according to claim 3, characterized in that, The chamber pressure setting component further includes a multi-channel selection reversing component and a first pneumatic-electric converter. The first pneumatic-electric converter is connected to the multi-channel selection reversing component and the main control device. The multi-channel selection reversing component is selectively connected to the first pneumatic button, the second pneumatic button, the first electrical converter, and the second electrical converter. The multi-channel selection reversing component is used to select whether to increase or decrease the chamber pressure preset value by driving the pulse pressure regulator through the first pneumatic button and the second pneumatic button, or to select whether to increase or decrease the chamber pressure preset value by driving the pulse pressure regulator through the first electrical converter and the second electrical converter.

5. The pneumatic intelligent pressure-maintaining system for tunnel boring machines according to claim 1, characterized in that, The shield machine pneumatic intelligent pressure-maintaining system also includes an alarm device. The first pressure-maintaining circuit further includes a pressure monitoring mechanism, a fault indicator light, an audible alarm, a third electrical converter, and a second pneumatic-electric converter. One end of the pressure monitoring mechanism is connected to the first pressure-maintaining circuit, and the other end of the pressure monitoring mechanism is connected to the alarm device. The alarm device is connected to the fault indicator light, the audible alarm, the second pneumatic-electric converter, and the third electrical converter, respectively. The second pneumatic-electric converter is also connected to the fault indicator light and the main control device, and the third electrical converter is also connected to the main control device.

6. The pneumatic intelligent pressure-maintaining system for tunnel boring machines according to claim 5, characterized in that, The tunnel boring machine pneumatic intelligent pressure-maintaining system also includes a third pneumatic button, which is connected to the alarm device and is used to turn off the warning signal of the audible alarm.

7. The pneumatic intelligent pressure-maintaining system for tunnel boring machines according to claim 1, characterized in that, The first pressure holding circuit also includes a fourth pneumatic button and a fourth electrical converter. One end of the fourth pneumatic button is connected to the dual pneumatic directional valve, and the other end of the fourth pneumatic button is connected to the main control device through the fourth electrical converter. The fourth pneumatic button is used to control whether the dual pneumatic directional valve is connected to the first pressure holding circuit.

8. The pneumatic intelligent pressure-maintaining system for tunnel boring machines according to any one of claims 1 to 7, characterized in that, The shield machine pneumatic intelligent pressure-maintaining system also includes an integrated control cabinet, in which the pressure setting component, the adjustment and calculation device, the second pressure-maintaining circuit, the dual pneumatic control reversing valve, and the air supply device are all located.

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