Heading machine cutting head temperature monitoring device
By installing infrared and high-definition cameras on the cutting head of the tunneling machine, combined with wireless torsional strain gauges and current sensors, the cutting parameters can be monitored and adjusted in real time, solving the problem of high-temperature damage to the cutting head and improving mining efficiency and equipment reliability.
Patent Information
- Application Number
- CN202520412017.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-11
AI Technical Summary
In existing underground bauxite mining processes, when the cutting head of the tunneling machine encounters a bauxite layer with high hardness, it is prone to damage due to high temperature, resulting in the chipping teeth falling off and the machine stopping, which increases costs and reduces mining efficiency.
Infrared and high-definition cameras are used to monitor the temperature and tooth breakage of the tunneling machine's cutting head. Combined with wireless torsional stress strain gauges and current sensors, the temperature and torque changes of the cutting head are monitored in real time. Cooling is achieved through annular spray pipes, and cutting parameters are automatically adjusted to prevent high-temperature damage.
It enables precise temperature monitoring and parameter adjustment of the cutting head, preventing high-temperature damage, improving mining efficiency and equipment lifespan, and reducing maintenance costs.
Smart Images
Figure CN223827150U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of bauxite mining tunneling machines, specifically relating to a temperature monitoring device for the cutting head of a tunneling machine. Background Technology
[0002] In existing underground bauxite mining, cantilever tunneling machines are used. During the mining process, the cutting head is controlled to advance forward and then move up and down to one side for excavation. However, bauxite has a complex geological structure. When encountering bauxite layers with high hardness during tunneling, the cutting head's cutting teeth collide with the bauxite layer at high speed. Due to the sudden change in the hardness of the bauxite layer, the cutting teeth will be damaged by high temperature under the abrupt change, or even fall off and stop the machine. It is necessary to replace the cutting head, which increases costs and reduces mining efficiency. Utility Model Content
[0003] The purpose of this invention is to provide a temperature monitoring device for the cutting head of a tunneling machine, which can accurately monitor the temperature of the cutting head, promptly propose improvement solutions, prevent the cutting teeth from being damaged by high temperature, leading to detachment or machine shutdown, and ensure mining efficiency.
[0004] The technical solution adopted in this utility model is a temperature monitoring device for the cutting head of a tunneling machine, including an infrared camera and a high-definition camera. The infrared camera and the high-definition camera are mounted on the telescopic part through a hidden camera bracket. The infrared camera and the high-definition camera are used to detect the temperature of the cutting teeth and the condition of broken teeth of the cutting head, respectively. The telescopic part is rotatably connected to the connecting shaft of the cutting head.
[0005] Preferably, the camera bracket includes a camera mounting plate, a double-rod cylinder, and a second sealing cover. The camera mounting plate is fixedly connected to an infrared camera and a high-definition camera side by side. The camera mounting plate is fixedly connected to the mounting plate fixedly connected to the ends of the two cylinder rods of the double-rod cylinder through an L-shaped plate. The tail end of the cylinder seat of the double-rod cylinder is rotatably connected to a recessed cavity provided on the top surface of the telescopic part through a pitch shaft. The pitch shaft is connected to a pitch motor that drives its rotation. The pitch motor is installed in a motor slot on one side of the recessed cavity. The second sealing cover is closed on the recessed cavity.
[0006] Preferably, the sealing cover 2 is connected to four connecting columns by four tension springs. The four connecting columns are symmetrically fixed to the cylinder seat of the double-rod cylinder. The sealing cover 2 includes a first sealing cover and a second sealing cover. The length of the first sealing cover is greater than that of the second sealing cover. The first sealing cover is hinged to the second sealing cover. The second sealing cover is hinged to a cavity at the end away from the cutting head. After the double-rod cylinder rotates to the cavity, it can elastically pull the first sealing cover to the sealing step set at the cavity opening. The second sealing cover seals the cavity opening.
[0007] Preferably, the connecting shaft of the cutting head is rotatably connected to the telescopic part and the inner part, away from the end of the cutting head, is connected to the output shaft of the gearbox, and the end of the telescopic part away from the cutting head is connected to the gearbox.
[0008] Compared with the prior art, the beneficial effect of this utility model is that it uses an infrared temperature camera to effectively monitor the cutting head, detects cutting teeth with excessively high temperatures, and uses the camera for secondary calibration to check whether the cutting teeth of the cutting head are damaged. In this way, it proposes an effective improvement method to prevent excessive damage to the cutting head during continuous construction and ensure mining efficiency. Attached Figure Description
[0009] Figure 1 This is an assembly diagram of the temperature monitoring device for the cutting head of a tunneling machine;
[0010] Figure 2 This is a side view diagram of the camera installation structure;
[0011] Figure 3 This is a schematic diagram of the camera installation structure viewed from below;
[0012] Figure 4 This is a schematic diagram of the rotating bracket installation structure;
[0013] Figure 5 This is a top view of the installation structure of the linear torsional stress strain gauge testing module;
[0014] Figure 6 This is a side view of the installation structure of the linear torsional stress strain gauge testing module. Detailed Implementation
[0015] The present invention will be further explained below with reference to the accompanying drawings to enable those skilled in the art to better understand it.
[0016] Example 1
[0017] like Figure 1-4As shown, the cutting head temperature monitoring device for a tunneling machine includes an infrared camera 3 and a high-definition camera 4. The infrared camera 3 and the high-definition camera 4 are mounted on the telescopic part 6 via a concealed camera bracket 8. The cutting head 5 is mounted on the cantilevered tunneling machine body 1. The connecting shaft 401 of the cutting head 5 is rotatably connected to the telescopic part 6, and the end of the telescopic part 6 furthest from the cutting head 5 is connected to the output shaft of the gearbox 7. The telescopic part 6 is connected to the gearbox 7 at the end furthest from the cutting head 5. The infrared camera 3 and the high-definition camera 4 are mounted on the telescopic part 6 via the concealed camera bracket 8. The infrared camera 3 and the high-definition camera 4 are used to detect the temperature of the cutting teeth and the condition of broken teeth of the cutting head, respectively. The infrared temperature camera effectively monitors the cutting head, detects cutting teeth with excessively high temperatures, and performs secondary calibration using the camera to check whether there is any damage to the cutting teeth of the cutting head. Then, effective improvement methods are proposed to prevent excessive damage to the cutting head during continuous construction and to ensure mining efficiency.
[0018] To facilitate camera concealment and enhance protection, the camera bracket 8 comprises a camera mounting plate 801, a dual-rod cylinder 802, and a sealing cover 803. The camera mounting plate 801 is fixedly connected side-by-side to the infrared camera 3 and the high-definition camera 4. The camera mounting plate 801 is fixedly connected to the mounting plate 805, which is fixedly connected to the ends of the two cylinder rods of the dual-rod cylinder 802, via an L-shaped plate 804. The tail end of the cylinder seat of the dual-rod cylinder 802 is rotatably connected to a recess 807 on the top surface of the telescopic part 4 via a pitch axis 806. The tilt axis 806 is connected to a tilt motor 808 that drives its rotation. The tilt motor 808 is installed in a motor slot 809 on one side of the cavity 807. The sealing cover 803 covers the cavity 807, hiding the camera in the cavity. This effectively protects the camera and prevents damage to the camera from flying stones during the use of the cutting head, thus improving safety. The camera is driven by a cylinder telescopic mechanism, which facilitates height control and allows for coverage of different shooting ranges. The tilt motor controls the tilt angle, thereby achieving optimal tilt angle control.
[0019] To facilitate sealing of the cavity, the second sealing cover 803 is connected to four connecting posts 811 via four tension springs 810. The four connecting posts 811 are symmetrically fixed to the cylinder seat of the double-rod cylinder 802. The second sealing cover 803 includes a first sealing cover 812 and a second sealing cover 813. The length of the first sealing cover 812 is greater than that of the second sealing cover 813. The first sealing cover 812 is hinged to the second sealing cover 813, and the second sealing cover 813 is hinged to the cavity at the end away from the cutting head. In cavity 807, after the double-rod cylinder 802 rotates and is located in the concave cavity 807, it can elastically pull the first sealing cover 812 onto the sealing step 814 set at the cavity opening of the concave cavity 807. The second sealing cover 813 seals the cavity opening. A sponge layer 815 is set at the bottom of the concave cavity 807. The two-stage sealing cover, combined with four tension springs and connecting columns, can achieve rapid and reliable sealing of the cavity, avoid interference, and achieve automatic opening and closing during the rotation of the hydraulic cylinder, reducing power equipment, lowering costs, and saving energy.
[0020] Example 2
[0021] like Figures 1-6 As shown, a tunneling machine, in addition to the structure of Embodiment 1, also includes an annular spray pipe 9. Two annular spray pipes 9 of different sizes are fixedly connected to a rotating support 10 and arranged in a trumpet shape outside the telescopic part 6. The rotating support 10 is rotatably connected to the outer surface of the telescopic part 6 and is driven to rotate back and forth within 180 degrees by a drive mechanism 12. Multiple spray heads 11 are arranged in annularly and alternately on the annular spray pipe 9, and the multiple spray heads 11 face the cutting teeth of the cutting head 4. This utility model sets up two annular spray pipes and staggered spray heads, which work together with the back and forth rotation of the rotating support to spray, effectively reducing dust and water consumption, and avoiding reliance on water pressure to achieve large-area spraying, thus achieving better energy saving and environmental protection.
[0022] The drive mechanism 12 includes a ring gear 1201, a drive gear 1202, and a swing drive motor 1203. The ring gear 1201 is fixedly connected to the rotating bracket 10 and located at one end of the cutting head. The drive gear 1202 meshes with the ring gear 1201 and is fixedly connected to the motor shaft of the swing drive motor 1203. The swing drive motor 1203 is fixedly connected to the telescopic part 6 via a motor frame 1204. The rotating bracket 10 is rotatably connected to the telescopic part 6 via a bearing 1205. The swing drive motor drives the rotating bracket to rotate within 180 degrees, providing rapid and stable operation. The 10 includes an inner ring 1001 and multiple bent pipes 1002. The inner ring 1001 is rotatably connected to the telescopic part 6 via a bearing 1205. The multiple bent pipes 1002 are uniformly fixedly connected to the inner ring 1001 in a circumferential direction and are bent towards the cutting head. The multiple bent pipes 1002 are fixedly connected to two annular spray pipes 9, and the top bent pipe 1002 serves as a water inlet pipe connected to the two annular spray pipes 9. The bent pipe 1002 is connected to the pumped water supply hose. The support is stable and reliable, and it also serves as a water inlet pipe, reducing the complexity of the equipment and reducing costs. Moreover, it can rotate within a 180° range without affecting the arrangement of the water supply pipe.
[0023] A wireless torsional stress-strain gauge testing module 2 for detecting torsional stress is installed on the connecting shaft 401 of the cutting head 4. To facilitate installation and accurate testing, the module includes two strain gauges 201, which are cross-attached to a groove 203 on the connecting shaft 401 and arranged at a 45° angle to the axis of the connecting shaft 401. The two strain gauges 201 are connected to a control circuit board 202, which is fixedly connected within the groove 203. The groove 203 is sealed with a sealing cap 204. The control circuit board 202 is connected to the thermoelectric generator module 13 via cable 205. A sealing cover 204 is installed where it passes through cable 205. Two stress strain gauges are used to test the torque, which can improve the test accuracy and facilitate installation. In addition, by setting a groove, the surface is avoided from being occupied and affecting the use of the connecting shaft. The sealing cover is used to avoid external influences, which can also improve the test stability and reliability. The control circuit board 202 is fixedly connected in the groove 203 by screws and spring washers. The spring washers are placed between the control circuit board and the groove and maintain a certain elasticity, which can play a role in vibration damping of the control circuit board.
[0024] To facilitate power supply to the wireless torsional stress-strain gauge module, the wireless torsional stress-strain gauge module 2 is connected to a thermoelectric generator module 13. The thermoelectric generator module is connected inside the cutting head 5. The wireless torsional stress-strain gauge module 2 is installed on the connecting shaft 401 located inside the cutting head 5. By setting up the thermoelectric generator module to supply power to the wireless torsional stress-strain gauge module, the heat generated by the cutting head is used to generate electricity to power the gauge module. This avoids interference caused by the power supply to the rotating cutting head and also saves energy. The thermoelectric generator can also meet the power supply requirements. High temperatures are generated during the cutting process of the cutting head, and the thermoelectric generator module is arranged using this high temperature to meet the power supply requirements, thereby reducing energy consumption and simplifying the wiring structure.
[0025] To achieve more accurate torque calibration, a current sensor for the drive motor of the drive gearbox 7 is also included. The current sensor is used to monitor changes in the torsional torque of the cutting head. Torque, temperature, and camera correction temperature monitoring are integrated to further improve detection accuracy.
[0026] To achieve reliable and accurate results through comprehensive automatic analysis, a monitoring and analysis module is also included. This module integrates the detection data from the current detection module, the wireless torsional stress strain gauge test module 2, the infrared camera 3, and the high-definition camera 4 to determine the operating status of the cutting head. By automatically integrating current, torque, temperature, and camera data, the monitoring and analysis module improves the accuracy and reliability of the judgment and increases the efficiency of the assessment.
[0027] Working principle of the tunneling machine: During the transverse cutting process, if the current sensor of the motor driving the cutting head 5 and the wireless torsional strain gauge testing module 2 arranged on the connecting shaft detect abrupt inflection points in the current curve and torque respectively, the feed rate of the cutting head 5 is halved, the rotation speed is increased by 20%, and the annular spray pipe is controlled to rotate back and forth, spraying water to cool the cutting teeth. If the current value and the torque of the cutting head are still twice the normal cutting value and maintained for a set time, the feed rate of the cutting head 5 is further reduced by one-third, the rotation speed is increased by 10%, and the current sensor and the wireless torsional strain gauge testing module 2 continue to detect the magnitude of the current and torque. The spray pipe operates under spraying and reciprocating conditions. When the current and torque meet the set range, the speed and feed rate are controlled for cutting. If the current and torque do not meet the set range, the cutting depth is reduced to one-third. The annular spray pipe operates under spraying and reciprocating conditions. If the current and torque meet the corresponding set range, the cutting is maintained. If not, the cutting is stopped, and the cutting head is rotated slowly. Infrared camera 3 is used to detect the temperature of the cutting head and cutting teeth, and high-definition camera is used to collect images of the cutting head. If the collected temperature is higher than the set value, and the images taken by the high-definition camera are compared to confirm whether there are broken teeth, the tunneling machine is stopped, and the cutting teeth are repaired or the cutting head 5 is replaced.
[0028] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from its design spirit and principles should fall within the protection scope defined by the claims of the present invention.
Claims
1. A temperature monitoring device for the cutting head of a tunneling machine, characterized in that, It includes an infrared camera (3) and a high-definition camera (4). The infrared camera (3) and the high-definition camera (4) are mounted on the telescopic part (6) by a hidden camera bracket (8). The infrared camera (3) and the high-definition camera (4) are used to detect the cutting tooth temperature and tooth breakage of the cutting head (5) respectively. The telescopic part (6) is rotatably connected to the connecting shaft (401) of the cutting head (5).
2. The temperature monitoring device for the cutting head of a tunneling machine according to claim 1, characterized in that, The camera bracket (8) includes a camera mounting plate (801), a double-rod cylinder (802), and a second sealing cover (803). The camera mounting plate (801) is fixedly connected to an infrared camera (3) and a high-definition camera (4) side by side. The camera mounting plate (801) is fixedly connected to the mounting plate (805) on which the ends of the two cylinder rods of the double-rod cylinder (802) are fixedly connected through an L-shaped plate (804). The tail end of the cylinder seat of the double-rod cylinder (802) is rotatably connected to the cavity (807) provided on the top surface of the telescopic part (6) through a pitch shaft (806). The pitch shaft (806) is connected to a pitch motor (808) that drives its rotation. The pitch motor (808) is installed in the motor slot (809) on one side of the cavity (807). The second sealing cover (803) covers the cavity (807).
3. The temperature monitoring device for the cutting head of a tunneling machine according to claim 2, characterized in that, The sealing cover 2 (803) is connected to four connecting columns (811) by four tension springs (810). The four connecting columns (811) are symmetrically fixed to the cylinder seat of the double-rod cylinder (802). The sealing cover 2 (803) includes a first sealing cover (812) and a second sealing cover (813). The length of the first sealing cover (812) is greater than that of the second sealing cover (813). The first sealing cover (812) is hinged to the second sealing cover (813). The second sealing cover (813) is hinged to the cavity (807) at the end away from the cutting head. After the double-rod cylinder (802) rotates to the cavity (807), it can elastically pull the first sealing cover (812) onto the sealing step (814) set at the cavity opening of the cavity (807). The second sealing cover (813) is sealed at the cavity opening.
4. The temperature monitoring device for the cutting head of a tunneling machine according to claim 1, characterized in that, The connecting shaft (401) of the cutting head (5) is rotatably connected to the telescopic part (6) and the end of the telescopic part (6) away from the cutting head (5) is connected to the output shaft of the gearbox (7). The end of the telescopic part (6) away from the cutting head (5) is connected to the gearbox (7).