Cylinder wear detection equipment

Abstract

The utility model relates to equipment for detecting wear of a cylinder. The equipment comprises a sensor assembly, a shield tunneling machine cylinder, a lining plate, a signal receiver and a cloud server, the lining plate is arranged in the shield tunneling machine barrel, the sensor assembly is in transmission connection with the interior of the shield tunneling machine barrel through threads, and the end, close to the interior of the shield tunneling machine barrel, of the sensor assembly extends into the lining plate through transmission connection of the threads and is flush with the abrasion face of the lining plate. Data collected by the sensor assembly are transmitted to the signal receiver through wireless signals, the data are transmitted in real time through the sensor assembly, abrasion signs can be found earlier through the cloud server, prevention measures can be taken in time, equipment faults are prevented, and the labor cost and the labor intensity are reduced. The advanced sensor technology and data processing enable the detection precision to be remarkably improved, which is particularly important for the wear detection of the shield tunneling machine barrel.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine cylinder wear detection technology, specifically to a cylinder wear detection device. Background Technology

[0002] A tunnel boring machine (TBM) is a type of tunnel excavator that uses the shield tunneling method. It is widely used in the construction of underground projects such as subways, railways, highways, and water conservancy. It can construct a shield that supports the pit wall while excavating an underground tunnel, thereby achieving the one-time formation of the tunnel. TBMs have advantages such as high construction efficiency, good safety, and strong applicability. Especially under complex geological conditions, TBM construction can better demonstrate its unique advantages.

[0003] With the widespread application of tunnel boring machines (TBMs) in various underground engineering projects, the wear problem of the TBM cylinder has become increasingly prominent. During use, the TBM cylinder is subjected to friction and wear from various media such as underground rocks and soil. After prolonged use, the wear of the cylinder will gradually increase, which will not only reduce the tunneling efficiency of the TBM, but may also threaten the safety of tunnel construction. Therefore, regular inspection of the wear condition of the TBM cylinder and timely understanding of the wear degree are important links to ensure the normal operation of the TBM and construction safety.

[0004] Traditional inspection methods have many limitations in detecting wear on tunnel boring machine (TBM) cylinders. Manual periodic inspections often rely on experience-based judgment, making it difficult to accurately measure the degree and location of wear, and are inefficient. They consume a lot of valuable time during TBM shutdown inspections, affecting project progress. Some conventional non-destructive testing methods, such as simple visual inspections or local sampling inspections, cannot accurately, comprehensively, and in real time grasp the wear condition of the cylinder. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a cylinder wear detection device to overcome the shortcomings of the prior art.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A device for detecting wear of a tunnel boring machine (TBM) cylinder includes a sensor assembly, a TBM cylinder, a liner, a signal receiver, and a cloud server; the liner is disposed inside the TBM cylinder, the sensor assembly is connected to the inside of the TBM cylinder via a threaded connection, one end of the sensor assembly near the inside of the TBM cylinder extends into the inside of the liner via a threaded connection and is flush with the wear surface of the liner, the sensor assembly is provided with a signal transmitter, the data collected by the sensor assembly is transmitted wirelessly to the signal receiver via the signal transmitter, the signal receiver transmits the received signal data to the cloud server via a network cable, and the cloud server processes the received data and then stores and displays the data.

[0007] The beneficial effects of this invention are: by transmitting data in real time through the sensor components and displaying it on the cloud server, wear signs can be detected earlier, which helps to take preventive measures in a timely manner, prevent equipment failure, and reduce labor costs and labor intensity. In addition, advanced sensor component technology and data processing significantly improve detection accuracy, which is especially important for the wear detection of tunnel boring machine cylinders.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the number of sensor components is several and they are evenly distributed on the outside of the tunnel boring machine cylinder.

[0010] Furthermore, the sensor assembly includes a connector, a thrust pad, a male connector, and a thickness measuring circuit strip. The outer side of the connector is fixed to the tunnel boring machine body via a threaded connection. The thickness measuring circuit strip is located inside the connector and its bottom is flush with the bottom of the connector. A metal base is threadedly connected to the outer side of the connector. The thrust pad is fixedly installed at the bottom of the metal base. A female connector is fixedly installed inside the metal base. A metal top cover is threadedly connected to the outer side of the metal base. A nylon cover is threadedly connected to the outer side of the metal top cover. A battery fixing plate is provided on the top of the inner wall of the metal top cover. A circuit control board is provided on the top of the metal top cover. A signal transmitter is connected to the top of the circuit control board. The battery mounting plate is fixed to the left and right sides of the circuit control board with bolts and a metal cover. A battery is fixedly installed at the bottom of the battery mounting plate. A signal transmission wire is electrically connected to the bottom of the circuit control board. The other end of the signal transmission wire is fixed to the top of the female connector. A sealing ring is fixedly installed between the metal base and the metal cover. The male connector is located below the female connector and its bottom is aligned with the top of the thickness measuring circuit strip. The female connector and the male connector are aligned by a spring positioning pin. A first washer is fixedly installed between the metal base and the connector. A second washer is fixedly installed between the metal base and the metal cover. Attached Figure Description

[0011] Figure 1 This is a connection diagram of the device of this utility model;

[0012] Figure 2 This is a cross-sectional view of the present invention installed on a tunnel boring machine;

[0013] Figure 3 This is a schematic diagram of the internal structure of the sensor assembly of this utility model;

[0014] Figure 4 This is a flowchart of the process of this utility model.

[0015] Figure 5 This is the internal circuit diagram of the thickness measuring circuit strip of this utility model;

[0016] Figure 6 This is the detection circuit diagram of the sensor assembly of this utility model.

[0017] The attached diagram lists the components represented by each number as follows:

[0018] 001. Sensor assembly; 002. Tunnel boring machine body; 003. Liner; 004. Signal receiver; 005. Cloud server; 1. Connector; 2. Thrust pad; 3. Metal base; 4. Female connector; 5. Metal top cover; 6. Nylon cover; 7. Battery fixing plate; 8. Circuit control board; 9. Signal transmitter; 10. Bolt; 11. Battery; 12. Signal transmission wire; 13. Sealing ring; 14. Spring positioning pin; 15. First washer; 16. Second washer; 17. Male connector; 18. Thickness measuring circuit strip. Detailed Implementation

[0019] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0020] Example 1, such as Figures 1-6 As shown, a device for detecting tunnel boring machine (TBM) cylinder wear includes a sensor assembly 001, a signal transmitter 9, a TBM cylinder 002, a liner 003, a signal receiver 004, and a cloud server 005. The liner 003 is disposed inside the TBM cylinder 002. The sensor assembly 001 is connected to the inside of the TBM cylinder 002 via a threaded connection. One end of the sensor assembly 001, near the inside of the TBM cylinder 002, extends into the inside of the liner 003 via a threaded connection and is flush with the wear surface of the liner 003. The sensor assembly 001 contains a signal transmitter 9. Data collected by the sensor assembly is transmitted wirelessly to the signal receiver 004 via the signal transmitter 9. The signal receiver 004 transmits the received signal data to the cloud server 005 via a network cable. The cloud server 005 processes the received data and then stores and displays the data.

[0021] The data collected by sensor assembly 001 is crucial for assessing the working status of tunnel boring machine cylinder 002 and predicting potential failures. Sensor assembly 001 collects data in real time during use and then transmits it to signal receiver 004 via wireless signal. Wireless transmission avoids the difficulty of laying cables in complex underground environments and ensures that data can be transmitted efficiently and stably.

[0022] The signal receiver 004 is responsible for receiving wireless signals from the signal transmitter 9 inside the sensor assembly 001 and converting these signals into processable data. It is usually installed in a location that facilitates signal reception to ensure the reliability of data transmission.

[0023] The cloud server 005 receives and stores the data transmitted from the signal receiver 004. Through data analysis and processing, it can monitor and provide early warning analysis of the working status of the tunnel boring machine cylinder 002 in real time. The cloud server 005 is also equipped with an early warning mechanism and provides decision support for maintenance and operation, so as to realize comprehensive and real-time monitoring of the tunnel boring machine cylinder and ensure the safety and efficiency of the construction process.

[0024] Explanation of the early warning mechanism: First, after the sensor assembly 001 is installed and debugged, the initial values ​​of the sensor assembly 001 are collected and recorded when the shield machine cylinder 002 is unworn.

[0025] Let the initial value of sensor component 001 be V0. This value represents the reference signal fed back by the sensor when the tunnel boring machine cylinder 002 is brand new or unworn (taking voltage as an example, in volts).

[0026] Under normal circumstances, the value of V0 is 5v, indicating that the tunnel boring machine cylinder 002 is in good condition. The wear level can be divided into three levels, namely the light wear warning threshold: when the sensor component 001 detects a value V1 that is 0.5v lower than the initial value V0, i.e. (V1 = V0 – 0.5v = 4.5v), it is judged as light wear. At this time, after receiving the signal, the control system can display "Light wear on the cylinder, please pay attention" on the operation interface and record the warning information, including time, wear level and other data.

[0027] Medium wear warning threshold: When the sensor component 001 detects a value of V1 = V0 – 1.5v = 3.5v, it means that the tunnel boring machine cylinder 002 has entered the medium wear stage. At this time, a yellow warning message will be given on the operation interface, such as "Cylinder medium wear, inspection and maintenance recommended".

[0028] Severe wear warning threshold: Once the detection value of sensor component 001 drops to V1=V0-2.5v=2.5v, it indicates that the tunnel boring machine cylinder 002 is in a state of severe wear, posing a significant safety hazard. At this time, the operation interface displays a conspicuous red alarm message, such as "Cylinder severely worn, please repair immediately".

[0029] Workers will stop operation and conduct maintenance based on alarms indicating severe wear and location of the tunnel boring machine (TBM) cylinder 002. During the operation of the TBM cylinder 002, sensor assembly 001 continuously monitors in real time. Due to the inherent error of the sensors or the influence of environmental factors, the sensors are automatically calibrated every certain period of time (e.g., every 100 hours of operation). The current value is compared with the initial value V0. If the deviation exceeds the allowable range (e.g., ±0.1V), a calibration operation is performed to ensure the accuracy of the early warning mechanism.

[0030] Example 2 is a further improvement based on Example 1, and it is as follows: the number of sensor assemblies 001 is several and they are evenly distributed on the outside of the tunnel boring machine cylinder 002.

[0031] Multiple sensor components 001 can better detect the wear degree of the tunnel boring machine cylinder 002, thereby improving the accuracy of wear degree detection.

[0032] Example 3 is a further improvement on Example 1, specifically as follows: The sensor assembly 001 includes a connector 1, a thrust pad 2, a male connector 17, and a thickness measuring circuit strip 18. The outer side of the connector 1 is fixedly connected to the tunnel boring machine body 002 via a threaded connection. The thickness measuring circuit strip 18 is located inside the connector 1 and its bottom is flush with the bottom of the connector 1. A metal base 3 is threadedly connected to the outer side of the connector 1. The thrust pad 2 is fixedly installed at the bottom of the metal base 3. A female connector 4 is fixedly installed inside the metal base 3. A metal top cover 5 is threadedly connected to the outer side of the metal base 3. A nylon cover 6 is threadedly connected to the outer side of the metal top cover 5. A battery fixing plate 7 is provided on the top of the inner wall of the metal top cover 5. A circuit control board 8 is provided, with a signal transmitter 9 connected to the top of the circuit control board 8. The battery fixing plate 7 is fixed to the left and right sides of the circuit control board 8 by bolts 10 and the metal cover 5. A battery 11 is fixedly installed at the bottom of the battery fixing plate 7. A signal transmission wire 12 is electrically connected to the bottom of the circuit control board 8. The other end of the signal transmission wire 12 is fixed to the top of the female connector 4. A sealing ring 13 is fixedly installed between the metal base 3 and the metal cover 5. The male connector 17 is located below the female connector 4 and its bottom is connected to the top of the thickness measuring circuit strip 18. The female connector 4 and the male connector 17 are connected by a spring positioning pin 14. A first washer 15 is fixedly installed between the metal base 3 and the connector 1. A second washer 16 is fixedly installed between the metal base 3 and the metal cover 5.

[0033] The thrust pad 2 prevents the internal components of the wear detection sensor assembly 001 from directly contacting the metal base 3 during operation, reducing wear and providing a certain shock absorption effect; the thickness measuring circuit strip 18, as the core component of the sensor assembly 001, is responsible for detecting changes in the thickness of the object and converting these changes into electrical signals; the spring positioning pin 14 is used to ensure the correct mating of the male connector 17 and the female connector 4, improving assembly accuracy; the first washer 15 and the second washer 16 can also be used at the bolt 10 connection to help distribute pressure and protect the connected surfaces from damage.

[0034] Before the tunnel boring machine starts working, the sensor assembly 001 is installed on the tunnel boring machine cylinder instead of the bolts fixing the liner plate, and the bottom surface of the sensor assembly 001 is flush with the wear surface of the liner plate 003. When the tunnel boring machine starts working, the sensor assembly 001 and the thickness measuring circuit strip 18 inside the sensor assembly 001 are worn synchronously with the liner plate 003.

[0035] When the thickness measuring circuit strip 18 is worn, its length becomes shorter, the number of resistors inside the thickness measuring circuit strip 18 decreases, and the resistance value of the equivalent resistance changes. Therefore, the electrical signal collected by the circuit control board 8 inside the sensor assembly 001 changes.

[0036] The circuit control board 8 sends the received electrical signal to the external signal receiver 004 through the signal transmitter 9 inside the sensor assembly 001. The signal receiver 004 transmits the received signal to the cloud server 005 through the network cable. The cloud server 005 calculates the number of worn parallel resistors in the thickness measuring circuit strip 18 based on the received signal, and finally calculates the wear amount of the liner 003 and displays it on the cloud server 005.

[0037] The thickness measuring circuit strip 18 is composed of NA parallel resistors that are equidistant and each has a resistance of RY. The equivalent resistance of the parallel circuit is RA. At the same time, a measuring resistor RB is provided on the sensor circuit board in series with this circuit. They are connected to each other by wires.

[0038] When the tunnel boring machine is working, the thickness measuring circuit strip 18 and the liner 003 are worn down simultaneously. The resistors in the parallel circuit of the thickness measuring circuit strip 18 are continuously worn down. Each time a resistor is worn down, the total resistance RA of the parallel circuit will change, thereby changing the voltages VAD1 and VAD2 across RB. The circuit control board 8 can measure the voltage across RB and calculate the number of resistors worn down in the thickness measuring circuit strip 18 according to the relationship between voltage and resistance in the series circuit. Finally, the wear amount of the thickness measuring circuit strip 18 is calculated by multiplying the number of worn resistors by the distance between the resistors, and then the wear amount of the liner 003 is obtained.

[0039] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A barrel wear detection apparatus comprising: Including sensor assembly (001), signal transmitter (9), shield machine cylinder (002), lining plate (003), signal receiver (004) and cloud server (005); The lining plate (003) is arranged in the inside of the shield machine cylinder (002), the sensor assembly (001) is connected by screw drive in the inside of the shield machine cylinder (002), the sensor assembly (001) is extended to the inside of the lining plate (003) by screw drive connection near the end of the inside of the shield machine cylinder (002), and is flush with the wear surface of the lining plate (003), signal transmitter (9) is arranged in the sensor assembly (001), the data collected by the sensor assembly is sent to signal receiver (004) by signal transmitter (9) with wireless signal transmission, the signal data received by signal receiver (004) is transmitted to cloud server (005) by network cable, and the received data is stored and displayed after processing by cloud server (005); The sensor assembly (001) includes connecting piece (1), thrust pad (2), connecting male head (17) and thickness measuring circuit strip (18), the outer side of connecting piece (1) is fixed by screw drive connection with shield machine cylinder (002), thickness measuring circuit strip (18) is located in the inside of connecting piece (1) and the bottom is flush with the bottom of connecting piece (1), the outer side of connecting piece (1) is connected by screw drive connection with metal base (3), thrust pad (2) is fixedly installed at the bottom of metal base (3), connecting female head (4) is fixedly installed in the inside of metal base (3), the outer side of metal upper cover (5) is connected by screw drive connection with nylon cover (6), battery fixing plate (7) is arranged on the inner wall top of metal upper cover (5), circuit control board (8) is arranged on the top of metal upper cover (5), signal transmitter (9) is connected on the top of circuit control board (8), the left and right sides of battery fixing plate (7) and circuit control board (8) are fixed with metal upper cover (5) by bolt (10), battery (11) is fixedly installed at the bottom of battery fixing plate (7), signal transmission wire (12) is electrically connected to the bottom of circuit control board (8), the other end of signal transmission wire (12) is fixed with the top of connecting female head (4), sealing ring (13) is fixedly installed between metal base (3) and metal upper cover (5), connecting male head (17) is located below connecting female head (4) and the bottom is butted with the top of thickness measuring circuit strip (18), connecting female head (4) and connecting male head (17) are butted by spring positioning pin (14), first gasket (15) is fixedly installed between metal base (3) and connecting piece (1), second gasket (16) is fixedly installed between metal base (3) and metal upper cover (5).

2. A barrel wear detection apparatus as claimed in claim 1, wherein, The number of the sensor assembly (001) is several and is uniformly distributed on the outside of the shield machine cylinder (002).

3. A barrel wear detection apparatus as claimed in claim 1, wherein, The circuit control board (8) sends the received electrical signal to the external signal receiver (004) through the signal transmitter (9) inside the sensor assembly (001), and the signal receiver (004) transmits the received signal to the cloud server (005) through a network cable, and the cloud server (005) calculates the number of parallel resistors worn in the thickness measuring circuit strip (18) according to the received signal, and finally calculates the wear of the lining plate (003) and displays it on the cloud server (005).

4. A barrel wear detection apparatus as claimed in claim 3, wherein, The thickness measuring circuit strip (18) is composed of NA equally spaced parallel resistors with a resistance of RY, and the equivalent resistance of the parallel circuit is RA. A measuring resistor RB is provided in series with the circuit on the circuit board of the sensor, and they are connected through wires.

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