A service condition self-detecting tool

Abstract

The utility model discloses a kind of service state self-detection cutters, it relates to the technical field of shield cutter, the service state self-detection cutter, including tool holder, tool holder is installed with tool body, tool body outside is fixed with cutter ring, cutter shaft is through the both ends of tool body, rotating sensor is installed on tool body near cutter shaft, temperature sensor is installed on tool body, temperature sensor is embedded to tool body inside, stress sensor is installed in tool body inside stress concentration area, simultaneously wear sensor is installed in cutter ring inside. The utility model passes through the collaborative work of multiple sensors, the key service state data such as rotation speed, temperature change, stress distribution and wear degree of cutter are acquired in real time, abnormal situation is found in time, avoid the safety accident caused by cutter failure, significantly improve the performance, safety and maintenance efficiency of shield cutter.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine cutterhead technology, and in particular to a self-detecting cutterhead in service status. Background Technology

[0002] During tunnel boring machine (TBM) construction, the cutterhead is a key component that directly participates in the cutting of the soil. Due to the complex and ever-changing construction environment, including the influence of various factors such as geological conditions and groundwater levels, the working condition of the cutterhead undergoes drastic changes.

[0003] Traditional hobbing cutters lack effective means of monitoring their service status and often rely on periodic inspections or repairs after a failure occurs. This not only increases maintenance costs but may also lead to safety accidents caused by hobbing cutter failure, affecting project progress and quality.

[0004] In view of this, a self-testing tool for service status is proposed to solve the above-mentioned problems. The tool is tested by installing multiple sensors on it. However, considering that these sensors are easily affected by mechanical vibration during use, a fixing mechanism is also needed to fix and protect the sensors. Utility Model Content

[0005] This utility model provides a self-testing cutting tool for service status, including a tool holder, a tool body installed in the tool holder, a tool ring fixed on the outside of the tool body, a tool shaft passing through both ends of the tool body, a rotation sensor installed on the tool body near the tool shaft, a temperature sensor installed on the tool body and embedded inside the tool body, a stress sensor installed in the stress concentration area inside the tool body, and a wear sensor installed inside the tool ring.

[0006] Preferably, the rotation sensor, temperature sensor, stress sensor, and wear sensor are all connected to the wireless acquisition module installed on the outside of the tunnel boring machine.

[0007] Preferably, the rotation sensor, temperature sensor, stress sensor, and wear sensor are all fixed by a fixing mechanism.

[0008] Preferably, the fixing mechanism includes a fixing frame that is bolted to the blade body, an extension sleeve that extends into the blade body, and one end of the rotation sensor is located within the fixing frame and the extension sleeve and extends into the area of ​​the blade body to be detected.

[0009] Preferably, one side of the fixing frame is provided with multiple sets of vibration dampers, one end of the vibration damper is connected to the front plate, and a fixing ring is fixedly installed on the rotation sensor. The fixing ring is connected to the front plate by bolts.

[0010] Preferably, the fixing ring has openings on both sides, and an inner plate is provided in the opening. The front plate has sliding holes on both sides, and a positioning plate is slidably arranged in the sliding holes. The positioning plate is fixed to the front plate by bolts.

[0011] Preferably, when fixed, the inner plate is located below the positioning plate.

[0012] Preferably, the front plate has an inner sleeve inside, which slides within the extension sleeve.

[0013] Preferably, the inner wall of the extension sleeve is connected to the lower end of the inner sleeve by an elastic element.

[0014] Preferably, a sealing ring is provided at the contact point between the rotation sensor and the front plate.

[0015] This utility model provides a self-detecting cutting tool for service status, which, compared with the prior art, offers the following advantages:

[0016] 1. This utility model uses multiple sensors to work together to acquire key service status data of the cutter in real time (such as rotation speed, temperature change, stress distribution and wear degree), promptly detect abnormalities, avoid safety accidents caused by cutter failure, and significantly improve the performance, safety and maintenance efficiency of the tunnel boring machine cutter.

[0017] 2. This utility model uses a fixing mechanism to fix the sensor and buffers the vibration generated during the operation of the hobbing cutter. Combined with the use of vibration dampers and elastic elements, it effectively absorbs these vibrations, protects the sensor from physical damage, and mitigates the influence of the external environment on the sensor, enabling the sensor to work stably for a long time under more demanding working conditions, thereby improving the durability and reliability of the overall system. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the sensor mounting structure according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the fixing mechanism structure according to an embodiment of the present utility model;

[0022] Figure 4This is a schematic diagram showing the disassembled structure of the fixing mechanism according to an embodiment of the present utility model;

[0023] Figure 5 This is an embodiment of the present utility model. Figure 4 A schematic diagram of the structure at point A;

[0024] Figure 6 This is a schematic diagram of the fixing ring structure according to an embodiment of the present utility model;

[0025] Figure 7 This is a schematic diagram of the vibration damper structure according to an embodiment of the present utility model;

[0026] Figure 8 This is a cross-sectional schematic diagram of the fixing mechanism structure according to an embodiment of the present utility model.

[0027] Figure label:

[0028] 1. Tool holder; 2. Tool body; 3. Tool ring; 4. Tool shaft; 5. Rotation sensor; 6. Temperature sensor; 7. Stress sensor; 8. Wear sensor; 9. Fixing bracket; 10. Extension sleeve; 11. Front plate; 12. Inner sleeve; 13. Sliding hole; 14. Positioning plate; 15. Vibration damper; 16. Fixing ring; 17. Opening; 18. Inner plate; 19. Elastic element. Detailed Implementation

[0029] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] Please refer to Figures 1-8 This utility model embodiment provides a self-testing cutting tool for service status, including a tool holder 1, a tool body 2 installed inside the tool holder 1, a tool ring 3 fixed on the outside of the tool body 2, and a tool shaft 4 passing through both ends of the tool body 2. The above structure combination constitutes a hobbing cutting tool.

[0031] To inspect the cutting tools in service, a rotation sensor 5 is installed on the cutter body 2 near the cutter shaft 4. The rotation sensor 5 uses a low-frequency electromagnetic detection method with alternating positive and negative magnetic poles to detect the rotation of the hob under low signal-to-noise ratio conditions. A temperature sensor 6 is installed on the cutter body 2, embedded inside the cutter body 2, especially near the cutting edge, to accurately measure the heat generated by the cutter during operation. The temperature sensor 6 uses the thermoelectric effect to detect the temperature of the cutter body 2. A stress sensor 7 is installed in the stress concentration area inside the cutter body 2 to detect the pressure borne by the hob during tunneling. At the same time, a wear sensor 8 is installed on the inner side of the cutter ring 3, near the cutting edge, to indirectly determine the wear degree of the cutter ring 3 by monitoring changes in the cutter ring 3.

[0032] Rotation sensor 5, temperature sensor 6, stress sensor 7, and wear sensor 8 are all connected to the wireless acquisition module installed on the outside of the tunnel boring machine for data exchange.

[0033] In addition, to ensure that the sensors are not affected by the external environment during use, the rotation sensor 5, temperature sensor 6, stress sensor 7 and wear sensor 8 are all fixed by a fixing mechanism.

[0034] Specifically, the fixing mechanism includes a fixing frame 9 bolted to the cutter body 2. An extension sleeve 10 is provided inside the fixing frame 9, extending into the cutter body 2. One end of the rotation sensor 5 is located inside the fixing frame 9 and the extension sleeve 10 and extends to the area of ​​the cutter body 2 to be detected. Multiple sets of vibration dampers 15 are provided on one side of the fixing frame 9. One end of the vibration damper 15 is connected to the front plate 11. A fixing ring 16 is fixedly installed on the rotation sensor 5. The fixing ring 16 is connected to the front plate 11 by bolts. This not only installs the sensor, but also buffers the vibration generated during machine operation through the use of the vibration damper 15, preventing the vibration from impacting the sensor.

[0035] Furthermore, openings 17 are provided on both sides of the fixing ring 16, and an inner plate 18 is provided in the opening 17. Sliding holes 13 are provided on both sides of the front plate 11, and a positioning plate 14 is slidably arranged in the sliding holes 13. When the fixing ring 16 is in contact with the front plate 11, the positioning plate 14 can be slid into the sliding hole 13. At this time, the inner plate 18 is located under the positioning plate 14. The positioning plate 14 is then fixed to the front plate 11 with bolts to enhance the stability of the sensor.

[0036] Furthermore, an inner sleeve 12 is provided inside the front panel 11. The inner sleeve 12 slides inside the extension sleeve 10. The sensor is inside the inner sleeve 12. An elastic element 19 is connected between the inner wall of the extension sleeve 10 and the lower end of the inner sleeve 12. The elastic element 19 can be a shock absorber or a shock-absorbing spring to enhance the shock absorption effect.

[0037] A sealing ring is provided at the contact point between the rotation sensor 5 and the front plate 11 to prevent oil, dust, and other contaminants from entering the interior and affecting the detection end of the rotation sensor 5.

[0038] The installation methods of the above sensors are all the same as those of the rotation sensor 5, so they will not be described in detail here.

[0039] In summary, the working principle of the self-monitoring cutter in service status according to this utility model embodiment is as follows: by installing rotation, temperature, stress, and wear sensors on the cutter body 2, the rotation state, temperature change, stress distribution, and wear condition of the cutter ring 3 are monitored respectively. The sensors are connected to the wireless acquisition module on the outside of the tunnel boring machine to achieve real-time data transmission. The fixing mechanism includes a fixing frame 9, an extension sleeve 10, a vibration damper 15, and an elastic element 19 to ensure stable installation of the sensors and reduce the impact of vibration.

[0040] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A self-detecting tool in service condition, comprising a tool holder (1), characterized in that: The tool holder (1) is equipped with a tool body (2), and a tool ring (3) is fixed on the outside of the tool body (2). The tool shaft (4) passes through both ends of the tool body (2). A rotation sensor (5) is installed on the tool body (2) near the tool shaft (4). A temperature sensor (6) is installed on the tool body (2). The temperature sensor (6) is embedded inside the tool body (2). A stress sensor (7) is installed in the stress concentration area inside the tool body (2). At the same time, a wear sensor (8) is installed inside the tool ring (3).

2. The self-inspection cutting tool for service status according to claim 1, characterized in that: The rotation sensor (5), temperature sensor (6), stress sensor (7) and wear sensor (8) are all connected to the wireless acquisition module installed on the outside of the tunnel boring machine.

3. The self-inspection tool for service status according to claim 2, characterized in that: The rotation sensor (5), temperature sensor (6), stress sensor (7) and wear sensor (8) are all fixed by a fixing mechanism.

4. The self-inspection tool for service status according to claim 3, characterized in that: The fixing mechanism includes a fixing frame (9) that is bolted to the blade body (2). An extension sleeve (10) is provided inside the fixing frame (9). The extension sleeve (10) extends into the blade body (2). One end of the rotation sensor (5) is located inside the fixing frame (9) and the extension sleeve (10) and extends into the area of ​​the blade body (2) to be detected.

5. The self-inspection cutting tool for service status according to claim 4, characterized in that: Multiple sets of shock absorbers (15) are provided on one side of the fixed frame (9). One end of the shock absorber (15) is connected to the front plate (11). A fixing ring (16) is fixedly installed on the rotation sensor (5). The fixing ring (16) is connected to the front plate (11) by bolts.

6. The self-inspection tool for service status according to claim 5, characterized in that: The fixing ring (16) has openings (17) on both sides, and an inner plate (18) is provided in the opening (17). The front plate (11) has sliding holes (13) on both sides, and a positioning plate (14) is slidably provided in the sliding holes (13). The positioning plate (14) is fixed to the front plate (11) by bolts.

7. The self-inspection cutting tool for service status according to claim 6, characterized in that: When fixed, the inner plate (18) is located below the positioning plate (14).

8. The self-inspection cutting tool for service status according to claim 7, characterized in that: The front plate (11) is provided with an inner sleeve (12), which slides inside the extension sleeve (10).

9. The self-inspection cutting tool for service status according to claim 8, characterized in that: The inner wall of the extension sleeve (10) is connected to the lower end of the inner sleeve (12) by an elastic element (19).

10. The self-inspection cutting tool for service status according to claim 5, characterized in that: A sealing ring is provided at the contact point between the rotary sensor (5) and the front plate (11).

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