Fireproof and smoldering temperature monitoring alarm for railway maintenance workshop

Abstract

The utility model relates to the field of railway vehicle overhauling safety technology, concretely relates to a fireproof and smoldering temperature monitoring alarm for railway repair workshop. The monitoring alarm is directly adsorbed on the welding repair part of train body or the surface of heating boiler furnace body through magnetic attraction piece, utilizes the heat conduction seat to conduct heat to temperature sensor quickly, realizes the temperature monitoring of railway repair workshop operation without blind area, continuous and comprehensive, accurately captures the temperature dynamic change, sends out the early warning in the initial stage of smoldering, effectively avoids the fire accident, improves the fire hazard disposal efficiency, and provides efficient and reliable guarantee for the safety of railway train repair.

Description

Technical Field

[0001] This utility model relates to the field of railway vehicle maintenance safety technology, specifically to a fireproof and smoldering-proof temperature monitoring alarm for railway maintenance workshops. Background Technology

[0002] During railway train maintenance, welding operations (such as welding repairs to car body panels) and boiler firing tests are two operations with high safety hazards, as they are prone to causing hidden temperature anomalies and smoldering.

[0003] On the one hand, railway train bodies generally have a sandwich structure, with the sandwich filled with cold-proof and heat-insulating materials. These materials have poor thermal conductivity and low ignition point. After the welding operation is completed, the residual heat of the weld and surrounding area is easy to accumulate inside the sandwich. Even if the surface temperature of the car body is within a safe range in the short term, the internal heat-insulating material may still slowly smolder due to continuous heat absorption. Moreover, there is no obvious open flame or smoke in the early stage of this process, which is difficult to be directly identified by the naked eye.

[0004] On the other hand, after the heating boiler combustion test is completed, there is a risk of abnormal local temperature rise in the boiler body and boiler room. If it is not monitored and dealt with in time, it may also cause a fire accident.

[0005] To manage the aforementioned risks, existing railway maintenance workshops adopt a purely human-based approach of "manual timed temperature monitoring + manual handling" in accordance with the "Notice on Safety Control Requirements for Hot Work Operations in Maintenance Workshops." The specific control procedures are as follows: After welding repair work is completed, the operator must first spray water to cool the welded area and monitor it continuously for 5 minutes. After confirming initial safety, at 20 minutes and 40 minutes after the work is completed, use an infrared thermometer to sequentially monitor the exterior wall and floor beyond 50cm of the welded area to record the base temperature. Then, monitor the weld seams and the area 20cm outside the weld seams at all welded areas, record the highest temperature, and compare it with the non-welded areas. If the temperature difference exceeds 5℃, immediately spray water to cool it down. If the temperature continues to rise or abnormal temperatures occur in other locations, the supervisor must be notified and the interior wall panels must be removed for inspection. After the heating boiler is tested, the operator and foreman must also monitor the boiler body at the above time intervals and handling requirements.

[0006] However, this existing control model has significant flaws and cannot meet the needs of full-cycle, blind-spot-free safety monitoring: First, manual timed temperature checks have obvious time blind spots. Within 20-minute or 40-minute intervals, if the temperature of the vehicle body interlayer or boiler perimeter suddenly rises (such as accelerated smoldering of internal insulation materials), manual monitoring cannot capture this dynamic change in real time, easily missing the best opportunity for intervention. Second, infrared thermometers can only collect temperature at a single point and cannot continuously and comprehensively monitor the temperature of welds and surrounding critical areas, potentially missing potential localized heating points. Third, the entire monitoring process is highly dependent on the responsibility and operational standards of the operators and foremen, making it prone to human errors such as missed detections, temperature point location deviations, and data recording errors. Finally, when manual detection detects abnormal temperatures, internal smoldering has often already progressed to a certain extent, requiring the disassembly of internal wall panels and other structures for inspection, which is not only inefficient but may also cause additional damage to the vehicle body. Utility Model Content

[0007] In response to the work requirements and existing problems in the aforementioned background technology, the inventor has considered and innovated in order to provide a fireproof and smoldering-proof temperature monitoring and alarm device for railway maintenance workshops, which is used for continuous temperature monitoring and automatic abnormal alarm in railway maintenance workshop operations.

[0008] To solve the above problems and achieve the above objectives, the present invention adopts the following technical solution:

[0009] A fireproof and smoldering-proof temperature monitoring and alarm device for railway maintenance workshops, the temperature monitoring and alarm device comprising:

[0010] The outer casing is a hollow rectangular structure with open sides. The outer casing has openings that match the shape of the alarm and is used to protect the internal components.

[0011] The rear cover matches the open surface of the outer shell and is detachably connected to the outer shell.

[0012] An alarm device is detachably connected to the housing and electrically connected to the digital temperature controller. The alarm device is used to receive signals from the digital temperature controller and issue an alarm signal.

[0013] A magnetic suction component is fixedly connected to the outside of the rear cover and is used to magnetically fix this temperature monitoring alarm.

[0014] A heat-conducting base is detachably connected to the outside of the rear cover. The heat-conducting base is used to conduct heat and fix the temperature sensor.

[0015] A temperature sensor is detachably connected to a heat-conducting base and electrically connected to a digital temperature controller. The temperature sensor is used to convert the collected temperature signal into an electrical signal and transmit it to the digital temperature controller.

[0016] A digital temperature controller, which is detachably connected to the inside of the housing;

[0017] A power supply compartment, which is detachably connected to the outer casing;

[0018] A power supply, which is detachably connected to the power supply compartment.

[0019] Preferably, the rear cover has four screw holes at its four corners, and the outer shell has four studs at its four corners that match the screw holes. The outer shell and the rear cover are detachably connected by bolts passing through the screw holes and studs.

[0020] Preferably, the alarm is fixedly connected to a fixing plate with several screw holes, and the outer shell has screw holes that match the shape of the screw holes on the fixing plate. The outer shell and the fixing plate are detachably connected by bolts. The power supply compartment has several screw holes, and the outer shell has screw holes that match the shape of the screw holes on the power supply compartment. The power supply compartment is detachably connected to the inner wall of the outer shell by bolts.

[0021] Preferably, the outer casing has an identification plate made by etching process, which is used to mark the alarm model, power supply voltage and warning information.

[0022] Preferably, the back cover has a magnetic base that matches the shape of the magnetic component. The magnetic base has a concave cavity structure, and the magnetic component is embedded in the concave cavity and then fixed by bonding with high-temperature resistant epoxy resin.

[0023] Preferably, the rear cover has a charging port, which is electrically connected to the power supply in the power compartment via a wire for charging the power supply.

[0024] Preferably, the heat-conducting base has at least four screw holes, and the rear cover has at least four corresponding studs. The rear cover has a mounting groove that matches the heat-conducting base. After the heat-conducting base is embedded in the mounting groove, it is detachably connected to the rear cover by bolts.

[0025] Preferably, the heat-conducting base has a slot and a socket that match the temperature sensor, and the temperature sensor passes through the socket and is electrically connected to the digital temperature controller.

[0026] Preferably, the magnetic attractor is a neodymium iron boron magnet and is cylindrical in shape.

[0027] Preferably, the heat-conducting base is made of copper alloy.

[0028] The working principle of this utility model is as follows:

[0029] The magnetic attachment of this invention allows the temperature monitoring alarm to be directly attached to the welded areas of the train body or the surface of the heating boiler. The heat-conducting base acts as a temperature transfer medium, quickly transferring residual heat accumulated in the insulation material within the train body or localized abnormal heat from the boiler to the temperature sensor. The temperature sensor collects the temperature transmitted by the heat-conducting base in real time and converts this temperature signal into an electrical signal, which is then transmitted to the digital temperature controller via a wire. The digital temperature controller receives the electrical signal from the temperature sensor, converts it into a digital temperature value, and displays it. Simultaneously, it continuously compares the temperature with the preset alarm trigger temperature T1. When the digital temperature controller determines that the real-time temperature has reached T1, it immediately sends a signal to the alarm, which then emits an alarm sound and a warning light to alert personnel to handle abnormal temperatures or smoldering risks. When the temperature drops back to T2, the digital temperature controller automatically disconnects the alarm circuit, and the alarm stops.

[0030] The beneficial effects of this utility model are:

[0031] 1. This utility model enables precise monitoring and early warning of maintenance workshop operations, significantly improving safety assurance capabilities. During welding repair operations, this utility model solves the problems of time blind spots and potential omissions caused by traditional manual timed temperature monitoring and single-point data collection by continuously and comprehensively monitoring the temperature of the weld and surrounding key areas. It can capture dynamic temperature changes in real time and issue early warnings at the initial stage of smoldering. At the same time, the automated temperature monitoring and alarm mechanism does not rely on manual operation, avoiding interference from human factors such as missed detections, temperature point location deviations, and data recording errors, ensuring accurate and reliable monitoring data, effectively preventing fire accidents, and providing strong protection for the safety of railway train maintenance.

[0032] 2. This utility model offers flexible installation and convenient maintenance. The outer casing, rear cover, alarm, power supply compartment, and other components are all designed with detachable connections, facilitating installation, disassembly, and maintenance. The magnetic design allows this utility model to quickly adhere to various monitoring surfaces, adapting to complex maintenance environments. Attached Figure Description

[0033] Figure 1 This is one of the schematic diagrams showing the usage of this utility model at a welding repair site;

[0034] Figure 2 This is the second schematic diagram of the usage status of this utility model at a welding repair operation site;

[0035] Figure 3 This is a schematic diagram of the usage status of this utility model in a heating boiler;

[0036] Figure 4 This is a front view of the present invention;

[0037] Figure 5 This is one of the three-dimensional structural schematic diagrams of this utility model;

[0038] Figure 6 This is the second three-dimensional structural schematic diagram of this utility model;

[0039] Figure 7 This is one of the three-dimensional assembly drawings of this utility model;

[0040] Figure 8 This is the second three-dimensional assembly drawing of this utility model;

[0041] Figure 9 This is a schematic diagram of the circuit principle of this utility model in the embodiment;

[0042] Reference numerals: 1—Outer shell, 11—Identification plate; 2—Rear cover, 21—Magnetic base, 22—Charging port; 3—Alarm, 31—Fixing plate; 4—Magnetic component; 5—Heat-conducting base; 6—Temperature sensor; 7—Digital thermostat; 8—Power supply compartment; 9—Power supply; A—Train, A1—Welding part, A11—Weld seam, A2—Insulation layer; B—Heating boiler; C—Power indicator; D—Power switch; E—Relay module; F—Alarm switch. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0044] Example

[0045] In this embodiment, the outer shell 1, back cover 2, and power supply compartment 8 are manufactured using 3D printing; the alarm 3 is a DC12V-110 dB audible and visual alarm; the magnetic component 4 is a cylindrical neodymium iron boron strong magnet; the heat-conducting base 5 is made of 30mm*30mm copper alloy plate; the temperature sensor 6 is an NTC10K temperature sensor, cylindrical with a diameter of 4.5mm and a temperature head length of approximately 25mm; the digital temperature controller 7 is an XH-W1411 digital temperature controller; and the power supply 9 is a Delipu 12V lithium battery with a capacity of 3000mAh, battery dimensions of 23*55*65mm, weight of 169 grams, and a power display.

[0046] like Figure 1 — Figure 8 The illustrated temperature monitoring and alarm device for fire prevention and smoldering prevention in railway maintenance workshops includes:

[0047] The outer casing 1 is the core supporting structure of the temperature monitoring alarm. The outer casing 1 is a hollow rectangular structure with open sides. The outer casing 1 has openings that match the shape of the alarm 3. The outer casing 1 is used to protect the internal components. The outer casing 1 has an identification plate 11, which is made by etching process. It is used to mark the alarm model, power supply voltage and warning information to provide operators with basic equipment parameters and safety tips to avoid misoperation.

[0048] The rear cover 2 matches the open surface of the outer shell 1 and is detachably connected to the outer shell 1. The rear cover 2 has four screw holes at its four corners, and the outer shell 1 has four studs at corresponding corner positions that match the screw holes. The outer shell 1 and the rear cover 2 are detachably connected by bolts passing through the screw holes and studs. The rear cover 2 has a magnetic base 21 that matches the shape of the magnetic component 4. The magnetic base 21 has a concave cavity structure, and the magnetic component 4 is embedded in the concave cavity and then fixed by high-temperature resistant epoxy resin adhesive. The rear cover 2 has a charging port 22, which is electrically connected to the power supply 9 inside the power supply compartment 8 via a wire for charging the power supply 9.

[0049] Alarm 3 is detachably connected to the outer casing 1 and electrically connected to the digital temperature controller 7. Alarm 3 receives signals from the digital temperature controller 7 and emits an alarm signal. Alarm 3 is fixedly connected to a mounting plate 31 with several screw holes. The outer casing 1 has screw holes matching the shape of the screw holes on the mounting plate 31. The outer casing 1 and the mounting plate 31 are detachably connected by bolts. The power supply compartment 8 has several screw holes, and the outer casing 1 has screw holes matching the shape of the screw holes in the power supply compartment 8. The power supply compartment 8 is detachably connected to the inner wall of the outer casing 1 by bolts. Alarm 3 receives the switch control signal output by the digital temperature controller 7. When the temperature reaches a preset threshold T1, it turns on the power and releases an audible and visual alarm signal to alert maintenance personnel of abnormal temperature and the risk of smoldering.

[0050] Magnetic suction component 4 is fixedly connected to the outside of the rear cover 2. Magnetic suction component 4 is used to magnetically fix this temperature monitoring alarm.

[0051] A heat-conducting base 5 is detachably connected to the outside of the rear cover 2. The heat-conducting base 5 conducts heat and secures the temperature sensor 6. The heat-conducting base 5 has a slot and a socket that match the temperature sensor 6. The temperature sensor 6 passes through the socket and is electrically connected to the digital temperature controller 7. The heat-conducting base 5 has at least four screw holes, and the rear cover 2 has at least four corresponding studs. The rear cover 2 has a mounting groove that matches the heat-conducting base 5. After the heat-conducting base 5 is embedded in the mounting groove, it is detachably connected to the rear cover 2 by bolts. The heat-conducting base 5 directly contacts the surface of the monitored object, transferring heat to the temperature sensor 6.

[0052] Temperature sensor 6 is detachably connected to heat-conducting base 5 and electrically connected to digital temperature controller 7. Temperature sensor 6 is used to convert the collected temperature signal into an electrical signal and transmit it to digital temperature controller 7.

[0053] Digital temperature controller 7, which is detachably connected to the inside of housing 1;

[0054] The power supply compartment 8 is detachably connected to the outer shell 1, and the power supply 9 is detachably connected inside the power supply compartment 8.

[0055] The specific usage process of this utility model is as follows:

[0056] This utility model is based on Figure 5 — Figure 8 The assembly is complete as shown; the circuit principle is as follows. Figure 9 As shown.

[0057] After retrieving the utility model from the warehouse, the operator first checks the battery level of battery 9 via the power display, ensuring that the power is sufficient for a single monitoring cycle (e.g., continuous monitoring for more than 6 hours after welding repair). Then, the operator presses the "Start" button on the digital temperature controller 7 and observes whether the digital display shows the temperature value correctly.

[0058] like Figure 1 , Figure 2 As shown, 20 minutes after the train body welding repair work is completed, this utility model is magnetically attracted to the welding part A1 of train A using the magnetic suction component 4. The number of units is determined according to the weld length (1 unit for short welds ≤ 50cm, 2-3 units for medium-long welds 50-150cm, 1 unit for every 50cm for extra-long welds > 150cm, plus 1 unit for splicing seams, and 3 units for corner welds). First, this utility model is attached to the non-welded part of train A to measure the temperature. Then, the digital temperature controller 7 is uniformly set to the temperature control threshold (T2 value in the car body welding repair work scenario is the temperature of train A at the non-welded part, and T1 value is set to be 5℃ higher than T2 value). After starting the equipment, the temperature monitoring of welding part A1 is entered. If the temperature of any device reaches T1, the alarm 3 triggers an audible and visual alarm. The staff immediately locates the alarm device, checks the temperature at welding part A1, removes the target alarm device, and sprays water to cool the corresponding area. After the monitoring cycle ends (generally 6 hours), this utility model is retrieved in sequence.

[0059] like Figure 3 As shown, when used for boiler monitoring, a single unit of this utility model is magnetically attached to the boiler body B of the heating boiler using magnetic attachment 4. Then, the digital temperature controller 7 is uniformly set with temperature control thresholds. Based on the normal waste heat temperature characteristics of the boiler, the alarm trigger temperature T1=60℃ and the alarm stop temperature T2=50℃ are set. If the alarm is triggered, the staff must arrive at the scene within 5 minutes, locate the device using sound and light signals, and check the temperature peak of the digital temperature controller 7. According to the temperature situation, safe cooling measures are taken (for mild heat accumulation of 60-65℃, open the ventilation window for natural ventilation; for moderate heat accumulation of 65-75℃, use an industrial fan for air cooling; for severe heat accumulation exceeding 75℃, immediately stop the surrounding work, spray flame-retardant cooling agent for cooling, and report to the supervisor dispatcher). After the temperature drops below T2, the alarm 3 automatically stops. Monitoring continues until the end of the monitoring cycle, and finally, this utility model is retrieved.

Claims

1. A fireproof and smoldering-proof temperature monitoring and alarm device for railway maintenance workshops, characterized in that, The temperature monitoring alarm includes: The outer shell (1) is a hollow rectangular structure with open sides. The outer shell (1) has openings that match the shape of the alarm (3). The outer shell (1) is used to protect the internal components. The rear cover (2) matches the open surface of the outer shell (1) and is detachably connected to the outer shell (1); Alarm (3), the alarm (3) is detachably connected to the outer shell (1) and electrically connected to the digital temperature controller (7). The alarm (3) is used to receive the signal from the digital temperature controller (7) and issue an alarm signal. Magnetic suction component (4), the magnetic suction component (4) is fixedly connected to the outside of the back cover (2), and the magnetic suction component (4) is used to magnetically fix this temperature monitoring alarm; Heat-conducting seat (5), which is detachably connected to the outside of the back cover (2), is used to conduct heat and fix the temperature sensor (6). Temperature sensor (6), the temperature sensor (6) is detachably connected to the heat-conducting base (5) and electrically connected to the digital temperature controller (7). The temperature sensor (6) is used to convert the collected temperature signal into an electrical signal and transmit it to the digital temperature controller (7). A digital temperature controller (7) is detachably connected to the inside of the outer casing (1); Power supply compartment (8), which is detachably connected to the outer shell (1); Power supply (9), which is detachably connected to the power supply compartment (8).

2. The fireproof and smoldering-proof temperature monitoring and alarm device for railway maintenance workshops according to claim 1, characterized in that, The back cover (2) has four screw holes at its four corners, and the outer shell (1) has four studs that match the screw holes at its four corners. The outer shell (1) and the back cover (2) are detachably connected by bolts passing through the screw holes and studs.

3. A fireproof and smoldering-proof temperature monitoring and alarm device for railway maintenance workshops according to claim 1, characterized in that, The alarm (3) is fixedly connected to a fixing plate (31), which has several screw holes. The outer shell (1) has screw holes that match the shape of the screw holes on the fixing plate (31). The outer shell (1) and the fixing plate (31) are detachably connected by bolts. The power supply compartment (8) has several screw holes, and the outer shell (1) has screw holes that match the shape of the screw holes on the power supply compartment (8). The power supply compartment (8) is detachably connected to the inner wall of the outer shell (1) by bolts.

4. A fireproof and smoldering-proof temperature monitoring and alarm device for railway maintenance workshops according to claim 1, characterized in that, The outer casing (1) has an identification plate (11), which is made by etching process and is used to mark the alarm model, power supply voltage and warning information.

5. A fireproof and smoldering-proof temperature monitoring and alarm device for railway maintenance workshops according to claim 1, characterized in that, The back cover (2) has a magnetic base (21) that matches the shape of the magnetic component (4). The magnetic base (21) is a concave cavity structure. The magnetic component (4) is embedded in the concave cavity and then fixed by bonding with high temperature resistant epoxy resin.

6. A fireproof and smoldering-proof temperature monitoring and alarm device for railway maintenance workshops according to claim 1, characterized in that, The rear cover (2) has a charging port (22), which is electrically connected to the power supply (9) in the power supply compartment (8) via a wire, for charging the power supply (9).

7. A fireproof and smoldering-proof temperature monitoring and alarm device for railway maintenance workshops according to claim 1, characterized in that, The heat-conducting seat (5) has at least four screw holes, and the back cover (2) has at least four corresponding studs. The back cover (2) has an installation groove that matches the heat-conducting seat (5). After the heat-conducting seat (5) is embedded in the installation groove, it is detachably connected to the back cover (2) by bolts.

8. A fireproof and smoldering-proof temperature monitoring and alarm device for railway maintenance workshops according to claim 1, characterized in that, The heat-conducting base (5) has a slot and a socket that match the temperature sensor (6). The temperature sensor (6) passes through the socket and is electrically connected to the digital temperature controller (7).

9. A fireproof and smoldering-proof temperature monitoring and alarm device for railway maintenance workshops according to claim 1, characterized in that, The magnetic attractor (4) is a neodymium iron boron strong magnet, and its shape is cylindrical.

10. A fireproof and smoldering-proof temperature monitoring and alarm device for railway maintenance workshops according to claim 1, characterized in that, The heat-conducting base (5) is made of copper alloy.

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