Real-time temperature monitoring device for railway steel rail welding seam

Abstract

The utility model discloses a real-time temperature monitoring device for a railway steel rail welding seam, which belongs to the field of temperature monitoring devices and comprises steel rail bodies and a welding seam body formed by welding the steel rail bodies, and a temperature monitoring mechanism is arranged below the welding seam body. Through cooperation of a bidirectional adjusting threaded rod, a U-shaped movable plate and a clamping plate, the device can be rapidly and conveniently fixed to a steel rail body, and the problems that a traditional bolt fixing mode is tedious in operation, consumes time and labor and is difficult to install in a space limited position are solved; the sensor probe is fixedly connected with the temperature sensor body through a nut and abuts against the surface of the welding seam body after the temperature sensor body is installed, so that installation is stable, and replacement and maintenance are convenient. Meanwhile, a traditional mode of sticking the probe with heat-conducting glue is abandoned, and the problems that the measurement accuracy is influenced by unstable sticking caused by environmental factors and the maintenance cost and the workload are increased due to aging and falling of the heat-conducting glue are solved.

Description

Technical Field

[0001] This utility model relates to the field of temperature monitoring devices, and in particular to a real-time temperature monitoring device for railway rail welds. Background Technology

[0002] Subway rail welds refer to the joints formed in subway lines where individual rail sections are melted together to connect them into a continuous, complete track, ensuring safe and stable train operation. This is achieved through specific welding techniques (such as flash welding, gas pressure welding, and aluminothermic welding) to fuse the ends of adjacent rails together. In subway construction and operation, rails are typically not laid in long, single-section installations; they must be transported and laid in segments. The welds act as "bridges," connecting these rails, and their quality directly impacts the smoothness and safety of train operation, as well as the lifespan of the rails. Defective welds can lead to bumpy train operation, abnormal noise, and even serious accidents such as rail breakage.

[0003] During subway operation, frequent braking and starting of trains, as well as fluctuations in ambient temperature, all cause temperature changes at the weld joints. Excessively high temperatures reduce the strength and toughness of the weld metal, similar to how high temperatures soften metal, increasing the risk of weld fracture. Conversely, excessively low temperatures can cause stress from the thermal expansion and contraction of the rails, potentially leading to weld cracks and affecting track stability. Therefore, temperature monitoring devices are needed to monitor the temperature of railway rail weld joints in real time.

[0004] In current technologies, when using contact temperature sensors for static monitoring of railway rail weld temperatures, the sensors need to be fixed in place, with the sensor probe positioned at the weld seam for contact. However, most existing sensor fixing methods use bolts, which is cumbersome, requiring specialized tools for installation and removal. This is not only time-consuming and labor-intensive but also presents greater challenges in space-constrained installation locations. Furthermore, the sensor probes are often adhered to the weld surface using high-temperature thermally conductive adhesives (such as silicone-based thermally conductive adhesives with a temperature resistance ≥200℃). However, this method has limitations. Firstly, the adhesion of the thermally conductive adhesive is affected by environmental factors such as humidity and dust, potentially leading to weak adhesion and affecting the accuracy of temperature measurements. Secondly, over long-term use, the thermally conductive adhesive may age and detach, requiring regular maintenance and replacement, increasing maintenance costs and workload, and also impacting the monitoring effectiveness of the weld seam. Utility Model Content

[0005] The main objective of this invention is to provide a real-time temperature monitoring device for railway rail welds, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A real-time temperature monitoring device for railway rail welds includes a rail body and a weld body formed by welding the rail bodies together. A temperature monitoring mechanism is provided below the weld body, and the temperature monitoring mechanism includes a temperature sensor body, a sensor probe, a bidirectional adjusting threaded rod, a U-shaped movable plate, and a clamping plate. The sensor probe is fixedly connected to the top surface of the temperature sensor body by a nut, and the bidirectional adjusting threaded rod is movably connected between symmetrical fixed blocks on the bottom surface of the temperature sensor body by rotating rods at both ends. The two U-shaped movable plates are movably connected to the bidirectional adjusting threaded rod through threaded holes on the front end wall, and a set of symmetrical clamping plates is fixedly connected to the top surface of the U-shaped movable plates.

[0008] Preferably, a set of symmetrical threaded short rods are fixedly installed on the top surface of the temperature sensor body.

[0009] Preferably, the front and rear ends of the sensor probe are respectively fixedly mounted with mounting bases, and the top surface of the mounting base is provided with mounting holes. The threaded short rod passes through the mounting holes, and the nut is threadedly connected to the threaded short rod. The sensor probe and the temperature sensor body are electrically connected through a connecting wire.

[0010] Preferably, guide strips are fixedly installed on the left and right side walls of the temperature sensor body, and a set of symmetrical fixing blocks are fixedly installed on the bottom surface of the temperature sensor body, with a rotation hole opened on the front wall of the fixing blocks.

[0011] Preferably, a rotating rod is fixedly installed at both ends of the bidirectional adjusting threaded rod, and the rotating rod is movably installed in the rotating hole. A knob is also fixedly installed on the end wall of the front rotating rod.

[0012] Preferably, the front end wall of the U-shaped movable plate is provided with a threaded hole and is threadedly connected to the bidirectional adjusting threaded rod through the threaded hole. The inner side walls of the U-shaped movable plate are respectively provided with guide grooves corresponding to the guide strip. The top two sides of the U-shaped movable plate are respectively fixedly installed with clamping plates, and the inner side wall of the clamping plates is provided with a clamping opening that matches the shape of the rail body.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In this invention, the temperature monitoring mechanism, through the cooperation of a bidirectional adjusting threaded rod, a U-shaped movable plate, and a clamping plate, can quickly and conveniently fix the device to the rail body, avoiding the problems of cumbersome operation, time-consuming and labor-intensive operation, and difficulty in installation in space-constrained locations associated with traditional bolt fixing methods. The sensor probe is fixedly connected to the temperature sensor body with a nut, and after the temperature sensor body is installed, it is pressed against the surface of the weld body, making the installation stable and easy to replace and maintain. At the same time, it abandons the traditional method of pasting the probe with thermally conductive adhesive, avoiding the problems of poor adhesion due to environmental factors affecting measurement accuracy and the increase in maintenance costs and workload due to the aging and falling off of thermally conductive adhesive. This ensures the accuracy, stability, and reliability of temperature monitoring of railway rail welds, which is conducive to timely detection of abnormal weld temperatures, ensuring train operation safety, and extending the service life of the rails. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a side view of the overall structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the overall structure of the temperature sensor body of this utility model;

[0018] Figure 4 This is a schematic diagram of the overall structure of the sensor probe of this utility model;

[0019] Figure 5 This is a structural breakdown diagram of the temperature monitoring mechanism of this utility model.

[0020] In the diagram: 1. Rail body; 2. Weld body; 3. Temperature monitoring mechanism; 4. Temperature sensor body; 5. Threaded short rod; 6. Guide bar; 7. Fixing block; 8. Rotating hole; 9. Sensor probe; 10. Mounting base; 11. Mounting hole; 12. Nut; 13. Bidirectional adjusting threaded rod; 14. Rotating rod; 15. Knob; 16. U-shaped movable plate; 17. Threaded hole; 18. Guide groove; 19. Clamping plate; 20. Clamping port. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below through specific embodiments. Example

[0022] like Figure 1 - Figure 5As shown, a real-time temperature monitoring device for railway rail welds includes a rail body 1 and a weld body 2 formed by welding between the rail bodies 1. A temperature monitoring mechanism 3 is provided below the weld body 2. The temperature monitoring mechanism 3 includes a temperature sensor body 4, a sensor probe 9, a bidirectional adjusting threaded rod 13, a U-shaped movable plate 16, and a clamping plate 19. The sensor probe 9 is fixedly connected to the top surface of the temperature sensor body 4 by a nut 12. The bidirectional adjusting threaded rod 13 is movably connected to the symmetrical fixed blocks 7 on the bottom surface of the temperature sensor body 4 by rotating rods 14 at both ends. The two U-shaped movable plates 16 are movably connected to the bidirectional adjusting threaded rod 13 by threaded holes 17 on the front end wall. A set of symmetrical clamping plates 19 are also fixedly connected to the top surface of the U-shaped movable plates 16.

[0023] like Figure 3 As shown, a set of symmetrical threaded short rods 5 are fixedly installed on the top surface of the temperature sensor body 4. The symmetrical threaded short rods 5 are pre-designed and fixedly installed on the temperature sensor body 4. The thread structure of the threaded short rods 5 has self-locking and fastening characteristics, providing a stable fixed foundation for the subsequent installation of the sensor probe 9.

[0024] like Figure 4 As shown, mounting bases 10 are fixedly installed at the front and rear ends of the sensor probe 9, and mounting holes 11 are opened on the top surface of the mounting base 10. The threaded short rod 5 passes through the mounting hole 11, and the nut 12 is threadedly connected to the threaded short rod 5. The sensor probe 9 and the temperature sensor body 4 are electrically connected through a connecting wire. The sensor probe 9 is fitted onto the threaded short rod 5 on the top surface of the temperature sensor body 4 through the mounting holes 11 on the mounting bases 10 fixed at its front and rear ends. Then, the nut 12 is screwed onto the threaded short rod 5. Through the interaction of the threads, the nut 12 is gradually tightened, and the sensor probe 9 is tightly fixed to the temperature sensor body 4. At the same time, the sensor probe 9 and the temperature sensor body 4 are electrically connected through a connecting wire. The temperature signal collected by the sensor probe 9 can be accurately transmitted to the temperature sensor body 4 for processing and analysis through the connecting wire. This installation method is simple and reliable, and can effectively ensure the stable connection between the sensor probe 9 and the temperature sensor body 4. In actual operation, this installation method can reduce the contact problems caused by vibration and other factors, thereby improving the accuracy and stability of temperature measurement.

[0025] like Figure 3 As shown, guide strips 6 are fixedly installed on the left and right side walls of the temperature sensor body 4, which can cooperate with the guide grooves 18 of the subsequent components to realize the guiding movement of the U-shaped movable plate 16. A set of symmetrical fixing blocks 7 are fixedly installed on the bottom surface of the temperature sensor body 4. A rotating hole 8 is opened on the front wall of the fixing block 7. The rotating hole 8 opened on the side wall of the fixing block 7 is used to cooperate with the rotating rod 14 to realize the rotation operation.

[0026] like Figure 5 As shown, rotating rods 14 are fixedly installed at the front and rear ends of the bidirectional adjusting threaded rod 13, and the rotating rods 14 are movably installed in the rotating hole 8. A knob 15 is also fixedly installed on the end wall of the front rotating rod 14. Rotating the knob 15 can drive the bidirectional adjusting threaded rod 13 to rotate through the rotating rod 14.

[0027] like Figure 5 As shown, the front wall of the U-shaped movable plate 16 has a threaded hole 17, which is threaded to the bidirectional adjusting threaded rod 13. The inner side walls of the U-shaped movable plate 16 have guide grooves 18 corresponding to the guide bar 6. Clamping plates 19 are fixedly installed on the top two sides of the U-shaped movable plate 16, and the inner side wall of the clamping plates 19 has a clamping opening 20 that matches the shape of the rail body 1. When the bidirectional adjusting threaded rod 13 rotates, the U-shaped movable plate 16 will move along the... As the bidirectional adjusting threaded rod 13 moves axially, the guide grooves 18 on the inner side walls of the U-shaped movable plate 16 cooperate with the guide strips 6 on the left and right side walls of the temperature sensor body 4, ensuring the stability and accuracy of the U-shaped movable plate 16 during movement and preventing it from shifting. The clamping plates 19 fixedly installed at the top of both sides of the U-shaped movable plate 16 cooperate with the rail body 1 through the clamping holes 20 on their inner side walls, fixing the temperature sensor body 4 on the rail body 1 and making the sensor probe 9 close to the bottom surface of the weld body 2. Example

[0028] The specific operating principle of temperature monitoring agency 3 for railway rail welds is as follows:

[0029] The sensor probe 9 is pre-installed on the top surface of the temperature sensor body 4, and the symmetrical threaded short rods 5 installed on the top surface of the temperature sensor body 4 pass through the mounting holes 11 opened on the top surface of the mounting bases 10 installed at the front and rear ends of the sensor probe 9. After screwing the nut 12 into the threaded short rods 5 and connecting them with the thread, the sensor probe 9 is fixed to the bottom surface of the rail body 1 by the nut 12. Then, the sensor probe 9 and the temperature sensor body 4 are connected together by a connecting line. Locate the weld body 2 formed after welding the rail bodies 1. After placing the temperature sensor body 4 below the weld body 2, move the temperature sensor body 4 upward until the sensor probe 9 installed on the top surface of the temperature sensor body 4 is close to the bottom surface of the weld body 2. Then, turn the knob 15 located below the temperature sensor body 4. The knob 15 will drive the rotating rod. 14. Rotate within the rotating hole 8 on the front wall of the symmetrical fixing block 7 installed on the bottom surface of the temperature sensor body 4. The rotating rod 14 will drive the bidirectional adjusting threaded rod 13 to rotate, so that the symmetrical U-shaped movable plates 16 will move relative to each other through the threaded hole 17 on the front wall along the bidirectional adjusting threaded rod 13. The U-shaped movable plates 16 will also move along the guide strips 6 installed on the two side walls of the temperature sensor body 4 through the guide grooves 18 on both sides of the inner wall of the recess until the clamping plate 19 installed on the U-shaped movable plate 16 is clamped onto the rail body 1 through the clamping port 20, and the knob 15 can no longer be rotated. The temperature monitoring mechanism 3 can then be installed and fixed on the rail body 1. At the same time, it ensures the tight contact between the sensor probe 9 and the weld body 2, thereby facilitating the reinstallation of the temperature monitoring mechanism 3.

[0030] The sensor probe 9 is crucial for temperature sensing. It directly contacts the bottom surface of the weld body 2 and uses contact measurement. Its built-in platinum resistance thermometer or thermocouple element can respond to temperature changes. If it is a resistance thermometer, when the temperature of the weld body 2 changes, heat is conducted to the probe, and the resistance value increases or decreases with the temperature rise and fall, thus being converted into an electrical signal. If it is a thermocouple, the temperature difference between its two ends will generate a thermoelectric potential, and its change is also converted into an electrical signal output. The collected temperature signal is transmitted in real time to the processing circuit inside the temperature sensor body 4 via the connecting wire for signal processing. The resistance thermometer signal is converted into a voltage signal by circuits such as a Wheatstone bridge, and then amplified and filtered. The quality of the thermocouple signal is improved; cold junction temperature compensation is performed to eliminate cold junction temperature interference. The processed signal is converted into a digital signal for easy subsequent operation. The digital temperature signal is transmitted to the host computer or monitoring equipment through the communication interface. The host computer displays the weld temperature in real time and can preset thresholds. Once the temperature exceeds or falls below the threshold, the system immediately issues an alarm. This early warning mechanism can promptly detect abnormalities in the weld body 2. For example, excessively high temperature may indicate stress concentration or excessive heat accumulation, prompting staff to take measures such as inspection and maintenance to avoid safety accidents such as weld body 2 fracture and ensure the safe operation of the railway. This achieves accurate monitoring of the temperature of the weld body 2.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A real-time temperature monitoring device for railway rail welds, comprising a rail body (1) and a weld body (2) formed by welding between the rail bodies (1), characterized in that: A temperature monitoring mechanism (3) is provided below the weld body (2), and the temperature monitoring mechanism (3) includes a temperature sensor body (4), a sensor probe (9), a bidirectional adjusting threaded rod (13), a U-shaped movable plate (16) and a clamping plate (19). The sensor probe (9) is fixedly connected to the top surface of the temperature sensor body (4) by a nut (12), and the bidirectional adjusting threaded rod (13) is movably connected between the symmetrical fixed blocks (7) on the bottom surface of the temperature sensor body (4) by rotating rods (14) at both ends. The two U-shaped movable plates (16) are movably connected to the bidirectional adjusting threaded rod (13) through threaded holes (17) on the front end wall, and a set of symmetrical clamping plates (19) are also fixedly connected to the top surface of the U-shaped movable plate (16).

2. The real-time temperature monitoring device for railway rail welds according to claim 1, characterized in that: A set of symmetrical threaded short rods (5) are fixedly installed on the top surface of the temperature sensor body (4).

3. The real-time temperature monitoring device for railway rail welds according to claim 2, characterized in that: The front and rear ends of the sensor probe (9) are respectively fixedly installed with mounting bases (10), and the top surface of the mounting base (10) is provided with mounting holes (11). The threaded short rod (5) passes through the mounting hole (11), and the nut (12) is threadedly connected to the threaded short rod (5). The sensor probe (9) and the temperature sensor body (4) are electrically connected through a connecting wire.

4. The real-time temperature monitoring device for railway rail welds according to claim 3, characterized in that: Guide strips (6) are fixedly installed on the left and right side walls of the temperature sensor body (4), and a set of symmetrical fixing blocks (7) are fixedly installed on the bottom surface of the temperature sensor body (4). A rotating hole (8) is opened on the front wall of the fixing block (7).

5. A real-time temperature monitoring device for railway rail welds according to claim 4, characterized in that: The front and rear ends of the bidirectional adjusting threaded rod (13) are respectively fixedly installed with rotating rods (14), and the rotating rods (14) are movably installed in the rotating hole (8). A knob (15) is also fixedly installed on the end wall of the front end of the rotating rod (14).

6. A real-time temperature monitoring device for railway rail welds according to claim 5, characterized in that: The front wall of the U-shaped movable plate (16) is provided with a threaded hole (17) and is threadedly connected to the bidirectional adjusting threaded rod (13) through the threaded hole (17). The inner side walls of the U-shaped movable plate (16) are respectively provided with guide grooves (18) corresponding to the guide bar (6). The top two sides of the U-shaped movable plate (16) are respectively fixedly installed with clamping plates (19), and the inner side wall of the clamping plate (19) is provided with a clamping opening (20) that matches the shape of the rail body (1).

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