A cable distributed online fire monitoring and break protection device
Patent Information
- Application Number
- CN202611133034.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-29
- Publication Date
- 2026-09-15
AI Technical Summary
[0003]目前现有技术包括沿线路布设的多个温度采集单元、信号传输模块、中央控制主机以及联动的断电执行机构，工作时由温度采集单元实时采集线缆周边温度数据，经信号传输模块上传至控制主机，当温度达到报警阈值时，主机发出告警信号，并在确认火情后远程控制断路器或脱扣机构完成线路断电，此类方案中，光纤感温式虽可实现长距离连续监测，但需配套昂贵的光信号解调设备，且光纤出现断点后监测功能随即失效，点式电子温感方案则需为每个监测点位配套供电与信号布线，施工部署成本高，还有一种机械式温感保护装置，常见结构多采用易熔合金作为感温触发元件，配合锁止机构与复位弹簧组装于壳体内部，当环境温度升高至易熔合金的熔点时，合金熔化失去锁止能力，弹簧释放带动执行机构完成单一动作，另有部分简易机械装置依靠单根弹簧的高温软化实现触发，通过弹簧弹力衰减直接释放锁止结构；
本装置投入使用时，通过安装装置将设备沿线缆均匀分布式布设，实现全线覆盖监测，常温初始状态下，普通黄铜材质的第二弹簧弹力充足，推动限位杆伸出限位筒内壁，镍基高温合金材质的第一弹簧处于压缩蓄能状态，其弹力经滑动块传递至运动杆，带动运动块抵靠在两侧限位杆的侧壁上，此时两侧限位杆形成横向限位约束，阻挡运动块与运动杆的轴向位移，预警块收纳于安装壳内部低位，装置保持稳定的待触发监测状态，当周边发生火灾、环境温度升高时，第一弹簧以及第二弹簧因材质差异呈现出显著不同的弹力衰减规律，普通黄铜材质的第二弹簧弹性系数随温度上升大幅下降，在形变量不变的前提下，其提供的限位推力显著减弱，而镍基高温合金材质的第一弹簧耐高温性能优异，弹性系数衰减幅度极小，弹力损失远低于第二弹簧，当温度达到设计触发阈值时，第一弹簧的弹力突破第二弹簧的限位阻力，推动滑动块沿轴向移动，带动运动块挤压两侧限位杆的圆弧接触面，迫使限位杆回缩至限位筒内部，限位约束随即解除，此后运动杆在第一弹簧的持续驱动下抬升，将顶端的预警块顶出至安装壳外，完成火灾预警触发，相较于传统电子式火灾监测方案，本装置无需外接供电系统与电子传感元件，仅依靠材料本身的物理特性即可实现无源式在线监测预警，运维人员仅通过直观观察预警块的伸出状态，即可快速判断对应点位是否发生火情，巡检便捷、可靠性强。
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Abstract
Description
Technical Field
[0001] This invention relates to the field of cable safety monitoring devices, specifically a distributed online fire monitoring and disconnection protection device for cables. Background Technology
[0002] With the rapid development of power systems and communication networks, cables are widely used in urban utility tunnels, traffic tunnels, industrial and mining enterprises, building power distribution and other scenarios. During long-term operation, cables are prone to fires due to overload, short circuit, insulation aging, external fire sources, etc., and the fire can spread rapidly along the cable insulation layer, causing large-scale power outages and secondary disasters.
[0003] Current technologies include multiple temperature acquisition units deployed along the line, a signal transmission module, a central control host, and a linked power-off actuator. During operation, the temperature acquisition unit collects real-time temperature data around the cable and uploads it to the control host via the signal transmission module. When the temperature reaches the alarm threshold, the host issues an alarm signal and remotely controls the circuit breaker or tripping mechanism to cut off the power to the line after confirming the fire. In this type of solution, although fiber optic temperature sensing can achieve long-distance continuous monitoring, it requires expensive optical signal demodulation equipment, and the monitoring function will fail immediately after the fiber optic cable breaks. Point-type electronic temperature sensing solutions require power supply and signal wiring for each monitoring point, resulting in high construction and deployment costs. There is also a mechanical temperature sensing protection device. Common structures often use fusible alloy as the temperature-sensing trigger element, which is assembled inside the housing with a locking mechanism and a reset spring. When the ambient temperature rises to the melting point of the fusible alloy, the alloy melts and loses its locking ability. The spring releases and drives the actuator to complete a single action. Some simple mechanical devices rely on the high temperature softening of a single spring to achieve triggering, and the locking structure is directly released by the spring force attenuation. Electronic devices are highly dependent on external power supplies and electronic components. During a fire, the high temperatures can easily burn out power lines, sensors, and control circuits, leading to complete failure of monitoring and protection functions. Furthermore, strong electromagnetic interference in high-voltage cable environments can cause abnormal temperature data, resulting in false alarms and missed alarms. Fusible alloy mechanical devices can only be triggered once at the alloy's melting point, with a fixed and unadjustable trigger temperature. Moreover, they cannot automatically reset after melting at high temperatures, and long-term storage can lead to alloy aging, poor contact, and other problems, causing trigger reliability to decrease with use. Therefore, those skilled in the art have provided a cable-distributed online fire monitoring and disconnection protection device to address the problems mentioned in the background. Summary of the Invention
[0004] The purpose of this invention is to provide a cable distributed online fire monitoring and disconnection protection device to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: A cable-distributed online fire monitoring and disconnection protection device includes two sets of installation devices, a monitoring device, and a disconnection device. The two sides of the monitoring device are fixedly connected to the opposite sides of the two sets of installation devices, and the two sets of installation devices are symmetrically arranged. The relatively distant side of the disconnection device is fixedly connected to the inside side of the monitoring device. The monitoring device includes a mounting shell, a mounting cylinder, a mounting block, a first spring, a moving rod, and two limiting components for the moving block. The mounting cylinder is fixedly connected inside the mounting shell, and both sides of the mounting shell are fixedly connected to the opposite sides of the two sets of mounting devices. The mounting block is fixedly connected inside the mounting cylinder. One end of the first spring is fixedly connected inside the mounting block. A sliding block is slidably connected inside the mounting block, and one side of the sliding block is fixedly connected to the end of the first spring away from the mounting block. One end of the moving rod is fixedly connected to the side of the sliding block away from the first spring. The moving block is fixedly connected to the outer wall of the moving rod. The two limiting components are fixedly connected inside the side wall of the mounting cylinder, and the outer wall of the moving block is in contact with the opposite sides of the two limiting components. A warning block is fixedly connected to the end of the moving rod away from the moving block. The opposite sides of the disconnection device are fixedly connected to the opposite sides of the bottom of the mounting shell.
[0006] As a further embodiment of the present invention: the limiting component includes a limiting cylinder, a second spring, a moving block, and a limiting rod. The limiting cylinder is fixedly connected to the side wall of the mounting cylinder. One end of the second spring is fixedly connected to the bottom of the limiting cylinder, and the other end of the second spring is fixedly connected to one side of the moving block. The moving block is slidably connected to the limiting cylinder. The side of the moving block away from the second spring is fixedly connected to one end of the limiting rod. The outer side wall of the end of the limiting rod away from the moving block is in contact with the outer side wall of the moving block.
[0007] As a further embodiment of the present invention: the first spring material is a nickel-based high-temperature alloy, the second spring material is ordinary brass, and the outer wall of the moving block and the outer wall of the moving block are both arc-shaped.
[0008] As a further embodiment of the present invention: the disconnection device includes two placement cylinders, two third springs, two connecting blocks, and two cutting blades. The relatively distant ends of the two placement cylinders are respectively fixedly connected to the opposite sides of the bottom of the mounting housing. One end of each of the two third springs is respectively fixedly connected to the bottom of the two placement cylinders. The opposite sides of the two third springs are respectively fixedly connected to one side of each of the two connecting blocks. The two connecting blocks are respectively slidably connected to the two placement cylinders. The opposite sides of each of the two connecting blocks are respectively fixedly connected to one side of each of the two cutting blades. A top rod is fixedly connected to the side of each of the two connecting blocks near the sliding block. Positioning rods are fixedly connected to both sides of each connecting block near the two top rods. The relatively distant sides of the two positioning rods are respectively abutted against the opposite sides of the two top rods.
[0009] As a further embodiment of the present invention: the mounting device includes an upper fixing frame, a lower fixing frame, a snap hook, a locking block, and a fixing component. One side of the upper fixing frame is fixedly connected to one side of the mounting shell, and one side of the upper fixing frame is fitted against one side of the lower fixing frame. One side of the snap hook is fixedly connected to the outer wall of the upper fixing frame, and one side of the locking block is fixedly connected to the outer wall of the lower fixing frame. The locking block has a snap groove on the side near the snap hook, and an installation groove is formed on the side wall of the snap groove. A fourth spring is fixedly connected to the bottom of the installation groove, and a locking rod is fixedly connected to the bottom of the fourth spring away from the installation groove. The snap hook extends into the snap groove, and the locking rod extends into the snap hook. The fixing component is fixedly connected to the opposite sides of the upper fixing frame and the lower fixing frame.
[0010] As a further embodiment of the present invention: the fixing component includes multiple telescopic rods and multiple fixing wheels. One end of each of the multiple telescopic rods is fixedly connected to the opposite side of the upper fixing frame and the lower fixing frame, and the multiple fixing wheels are fixedly connected to the ends of the multiple telescopic rods away from the upper fixing frame and the lower fixing frame, and the outer sidewalls of the multiple fixing wheels are provided with fitting grooves.
[0011] As a further embodiment of the present invention: a through groove is provided on the side wall of the mounting groove, and a toggle rod is fixedly connected to the side of the locking rod near the through groove. The toggle rod is slidably connected to the through groove, and the opposite sides of the locking rod and the engaging hook are both arranged in an arc shape.
[0012] As a further embodiment of the present invention: a base plate is fixedly connected to the bottom of the two lower fixed frames, and a counterweight is fixedly connected to the side of the base plate away from the two lower fixed frames, with the counterweight located at the center of the base plate.
[0013] Compared with the prior art, the beneficial effects of the present invention are: When this device is put into use, it is evenly distributed along the cable using the installation device to achieve full-line coverage monitoring. In the initial state at room temperature, the second spring, made of ordinary brass, has sufficient elasticity, pushing the limit rod out of the inner wall of the limit cylinder. The first spring, made of nickel-based high-temperature alloy, is in a compressed, energy-storing state, and its elasticity is transmitted to the moving rod via the sliding block, causing the moving block to abut against the side walls of the two limit rods. At this time, the two limit rods form a lateral limiting constraint, preventing axial displacement of the moving block and the moving rod. The warning block is stored in a low position inside the mounting housing, and the device maintains a stable, ready-to-be-triggered monitoring state. When a fire occurs nearby or the ambient temperature rises, the first and second springs exhibit significantly different elasticity decay patterns due to their different materials. The elastic coefficient of the second spring, made of ordinary brass, decreases significantly with increasing temperature. Under the premise of constant deformation, the limiting thrust it provides is significantly reduced. The first spring, made of nickel-based high-temperature alloy, has excellent high-temperature resistance and minimal elastic coefficient decay, resulting in a much lower elastic force loss than the second spring. When the temperature reaches the designed trigger threshold, the elastic force of the first spring breaks through the limiting resistance of the second spring, pushing the sliding block to move axially. This causes the moving block to press against the arc contact surfaces of the limiting rods on both sides, forcing the limiting rods to retract into the limiting cylinder, thus releasing the limiting constraint. Subsequently, the moving rod rises under the continuous drive of the first spring, pushing the warning block at the top out of the mounting housing, completing the fire warning trigger. Compared to traditional electronic fire monitoring solutions, this device does not require an external power supply system or electronic sensing elements. It can achieve passive online monitoring and warning solely based on the physical properties of the material itself. Maintenance personnel can quickly determine whether a fire has occurred at the corresponding location simply by visually observing the extension status of the warning block. This makes inspection convenient and highly reliable. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of a cable-distributed online fire monitoring and disconnection protection device. Figure 2 This is a split diagram of the installation device in a cable-distributed online fire monitoring and disconnection protection device. Figure 3 This is a schematic diagram of one side of the upper fixed frame in a cable-distributed online fire monitoring and disconnection protection device. Figure 4 A sectional view of one side of the mounting housing in a cable-distributed online fire monitoring and disconnection protection device; Figure 5 This is a sectional view of one side of the limiting cylinder in a cable distributed online fire monitoring and disconnection protection device; Figure 6 This is a sectional view of one side of the mounting block in a cable-distributed online fire monitoring and disconnection protection device.
[0015] In the diagram: 1. Mounting device; 101. Upper fixing frame; 102. Lower fixing frame; 103. Engaging hook; 104. Locking block; 105. Engaging groove; 106. Mounting groove; 107. Fourth spring; 108. Locking rod; 2. Monitoring device; 201. Mounting shell; 202. Mounting cylinder; 203. Mounting block; 204. First spring; 205. Moving rod; 206. Moving block; 207. Sliding block; 208. Warning block; 3. Disconnection device; 301. Placement cylinder; 302. Third spring; 303. Connecting block; 304. Cutting blade; 305. Top rod; 306. Positioning rod; 4. Limiting assembly; 401. Limiting cylinder; 402. Second spring; 403. Moving block; 404. Limiting rod; 5. Fixing assembly; 501. Telescopic rod; 502. Fixed wheel; 503. Adaptor groove; 6. Through groove; 7. Actuating rod; 8. Base plate; 9. Counterweight. Detailed Implementation
[0016] Please see Figures 1-6 In this embodiment of the invention, a cable distributed online fire monitoring and disconnection protection device includes two sets of installation devices 1, a monitoring device 2, and a disconnection device 3. The two sides of the monitoring device 2 are fixedly connected to the opposite sides of the two sets of installation devices 1, and the two sets of installation devices 1 are symmetrically arranged. The relatively far side of the disconnection device 3 is fixedly connected to one side inside the monitoring device 2. The monitoring device 2 includes a mounting shell 201, a mounting cylinder 202, a mounting block 203, a first spring 204, a moving rod 205, and two limiting components 4: a mounting housing 201, a mounting cylinder 202, a mounting block 203, a first spring 204, a moving rod 205, and two limiting components 4: a moving rod 206 and a moving rod 205. The mounting cylinder 202 is fixedly connected inside the mounting shell 201, with both sides of the mounting shell 201 fixedly connected to the opposite sides of the two sets of mounting devices 1. The mounting block 203 is fixedly connected inside the mounting cylinder 202. One end of the first spring 204 is fixedly connected inside the mounting block 203. A sliding block 207 is slidably connected inside the mounting block 203, with one side of the sliding block 207 fixedly connected to the end of the first spring 204 away from the mounting block 203. One end of the moving rod 205 is fixedly connected to the side of the sliding block 207 away from the first spring 204. The moving block 206 is fixedly connected to the outer wall of the moving rod 205. The two limiting components 4 are fixedly connected to the side walls of the mounting cylinder 202, with the outer wall of the moving block 206 abutting against the opposite sides of the two limiting components 4. 05 The end away from the moving block 206 is fixedly connected to the warning block 208. The relatively distant side of the disconnection device 3 is fixedly connected to the bottom opposite side of the mounting shell 201. The limiting component 4 includes a limiting cylinder 401, a second spring 402, a moving block 403 and a limiting rod 404. The limiting cylinder 401 is fixedly connected to the side wall of the mounting cylinder 202. One end of the second spring 402 is fixedly connected to the bottom of the limiting cylinder 401. The other end of the second spring 402 is fixedly connected to one side of the moving block 403. The moving block 403 is slidably connected to the limiting cylinder 401. The side of the moving block 403 away from the second spring 402 is fixedly connected to one end of the limiting rod 404. The outer side wall of the end of the limiting rod 404 away from the moving block 403 is in contact with the outer side wall of the moving block 206. The material of the first spring 204 is nickel-based high-temperature alloy, the material of the second spring 402 is ordinary brass, and the outer side wall of the moving block 403 and the outer side wall of the moving block 206 are both arc-shaped.
[0017] It should be noted that this device forms a distributed online monitoring system by evenly spacing the mounting devices 1 on both sides along the cable axis, achieving full-length temperature coverage without blind spots. In the initial standby state at room temperature, the second spring 402, made of ordinary brass, is in a pre-compressed state. Relying on its own elastic restoring force, it pushes the moving block 403 to slide outward along the axial direction of the limiting cylinder 401, thereby continuously pushing the limiting rod 404 into the internal cavity of the mounting cylinder 202. At the same time, the first spring 204, made of nickel-based high-temperature alloy, is also in a pre-compressed energy storage state. Its elastic restoring force acts on the sliding block 207 along the axial direction, driving the moving rod 205 and the moving block fixed to the rod body. 206 generates an axial upward movement tendency. At this time, the outer arc surface of the moving block 206 is tightly fitted with the end arc surfaces of the two limiting rods 404. The radial limiting force provided by the second spring 402 is transformed into a reverse resistance that hinders the axial displacement of the moving block 206 through the force decomposition effect of the arc contact surface. This forms a stable force balance with the axial driving force of the first spring 204, so that the moving block 206 and the moving rod 205 are constrained in the preset low position within the mounting cylinder 202. The warning block 208 is then stored inside the mounting shell 201, and the device maintains a stable ready-to-trigger monitoring state. When a fire occurs around the cable or the ambient temperature continues to rise, the shear modulus of both types of springs increases accordingly. While the elastic modulus decreases with increasing temperature, the rate of decrease varies significantly due to differences in the intrinsic properties of the materials. Ordinary brass has a large temperature coefficient of elastic modulus, and its elastic modulus decreases rapidly and significantly with increasing temperature. Since the relative position of the limiting rod 404 and the moving block 206 remains unchanged, the compression deformation of the second spring 402 remains constant. According to Hooke's Law F=kx, the radial limiting thrust it provides will significantly weaken synchronously with the decrease in the elastic modulus. In contrast, nickel-based high-temperature alloys have stronger interatomic bonding and excellent high-temperature stability, and their elastic modulus decreases much less with temperature than that of ordinary brass. Under the same temperature rise conditions, the axial driving force of the first spring 204... With minimal loss, it can still maintain elastic recovery force close to room temperature. When the ambient temperature rises to the preset trigger threshold, the limiting force of the second spring 402 decays to the critical value. The radial component of the axial driving force of the first spring 204, converted through the arc contact surface, is greater than the maximum limiting resistance that the second spring 402 can provide. The force balance is broken, and the moving block 206, pushed by the first spring 204, squeezes the limiting rods 404 on both sides, pushing the moving block 403 to further compress the second spring 402, causing the limiting rods 404 to continuously retract into the limiting cylinder 401 until they completely exit the axial movement path of the moving block 206, and the axial limiting constraint is completely released.Subsequently, the first spring 204 continuously pushes the sliding block 207 to slide axially along the inner wall of the mounting block 203, causing the moving rod 205 to rise synchronously, and finally pushing the warning block 208 at the top out to the outside of the mounting shell 201, forming an intuitive visual warning signal, and completing the fire warning triggering at the monitoring point. Compared with the traditional electronic fire monitoring device 2, this solution relies entirely on the inherent physical properties of metal materials to realize temperature sensing and triggering action, without the need for external power supply, electronic sensors and control circuits, fundamentally avoiding monitoring failure problems caused by high temperature burning, electromagnetic interference and power interruption. It has stronger operational reliability and environmental adaptability. When maintenance personnel inspect along the line, they only need to intuitively observe the extension status of the warning blocks 208 at each point to quickly locate the fire location. The inspection efficiency is high and the maintenance cost is low. It is especially suitable for cable distributed fire monitoring scenarios in complex environments such as long-distance transmission lines, underground pipe corridors, and tunnels. Moreover, the warning block 208 can be printed with fireproof coating on the outer wall, making it easier to observe.
[0018] The disconnection device 3 includes two placement cylinders 301, two third springs 302, two connecting blocks 303, and two cutting blades 304. The relatively far ends of the two placement cylinders 301 are fixedly connected to the opposite sides of the bottom of the mounting shell 201. One end of each of the two third springs 302 is fixedly connected to the bottom of the two placement cylinders 301. The opposite sides of the two third springs 302 are fixedly connected to one side of each of the two connecting blocks 303. The two connecting blocks 303 are slidably connected to the two placement cylinders 301. The side of each connecting block 303 away from the two third springs 302 is fixedly connected to one side of each of the two cutting blades 304. A top rod 305 is fixedly connected to the side of each connecting block 303 near the sliding block 207. A positioning rod 306 is fixedly connected to both sides of each connecting block 303 near the two top rods 305. The relatively far sides of the two positioning rods 306 are respectively attached to the opposite sides of the two top rods 305.
[0019] It should be noted that, in the initial state of use, the two positioning rods 306 are respectively attached to the opposite sides of the two top rods 305, which are kept stationary by the two positioning rods 306. When a fire occurs, the first spring 204 presses the sliding block 207 to rise, and the two positioning rods 306 move synchronously. The two positioning rods 306 will not lock the two top rods 305. At this time, the two third springs 302 provide elastic force to pop out the cutting blade 304. The cutting blade 304 can cut the cable at the fire location, completing the disconnection protection. The above device still does not require a power system. When the device is in use, it can be synchronized with the occurrence of the warning and can accurately cut the cable at the fire location.
[0020] The mounting device 1 includes an upper fixing frame 101, a lower fixing frame 102, a locking hook 103, a locking block 104, and a fixing component 5. One side of the upper fixing frame 101 is fixedly connected to one side of the mounting shell 201. One side of the upper fixing frame 101 is fitted to one side of the lower fixing frame 102. One side of the locking hook 103 is fixedly connected to the outer wall of the upper fixing frame 101. One side of the locking block 104 is fixedly connected to the outer wall of the lower fixing frame 102. The locking block 104 has a locking groove 105 on the side near the locking hook 103. The side wall of the locking groove 105 has an installation groove 106. A fourth spring 107 is fixedly connected to the bottom of the installation groove 106. A locking rod 108 is fixedly connected to the bottom of the fourth spring 107 away from the installation groove 106. The locking hook 103 extends into the interior of the locking groove 105. The locking rod 108 extends into the interior of the locking hook 103. The fixing component 5 is fixedly connected to the opposite sides of the upper fixing frame 101 and the lower fixing frame 102.
[0021] It should be noted that when using the above device, during the installation of device 1, the upper fixing frame 101 is aligned with the lower fixing frame 102, so that the locking hook 103 enters the locking groove 105. At this time, the locking hook 103 will press the locking rod 108, causing the fourth spring 107 to be in a compressed state. The locking rod 108 will enter the mounting groove 106. When the locking hook 103 is fully inserted into the locking groove 105, the fourth spring 107 provides elasticity, causing the locking rod 108 to pop out and enter the locking hook 103, so that the locking hook 103 can be locked in the locking groove 105. At this time, the upper fixing frame 101 and the lower fixing frame 102 are fixedly installed, making the device easier to install, increasing the practicality of the device, and increasing the efficiency of the device.
[0022] The fixing component 5 includes multiple telescopic rods 501 and multiple fixing wheels 502. One end of each telescopic rod 501 is fixedly connected to the opposite side of the upper fixing frame 101 and the lower fixing frame 102, respectively. The multiple fixing wheels 502 are fixedly connected to the ends of the multiple telescopic rods 501 away from the upper fixing frame 101 and the lower fixing frame 102, respectively. The outer side wall of each of the multiple fixing wheels 502 is provided with an adapter groove 503.
[0023] It should be noted that in the above device, during the installation of the upper fixed frame 101 and the lower fixed frame 102, the cable will squeeze the outer walls of multiple fixed wheels 502, causing multiple telescopic rods 501 to deform. After the upper fixed frame 101 and the lower fixed frame 102 are connected, the multiple telescopic rods 501 and multiple fixed wheels 502 can be stably fixed to the outer wall of the cable. Through the adapter groove 503, the adapter groove 503 allows the fixed wheels 502 to fit more closely to the outer wall of the cable, making the installation more secure and increasing the safety and stability of the device.
[0024] The mounting groove 106 has a through groove 6 on its side wall. The locking rod 108 is fixedly connected to a toggle rod 7 on the side near the through groove 6. The toggle rod 7 is slidably connected to the through groove 6. The locking rod 108 and the locking hook 103 are both arc-shaped on opposite sides. The bottom of the two lower fixing frames 102 is fixedly connected to a base plate 8. The side of the base plate 8 away from the two lower fixing frames 102 is fixedly connected to a counterweight 9. The counterweight 9 is located at the center of the base plate 8.
[0025] It should be noted that when the above device is in use, if it needs to be disassembled, simply move the lever 7 to move the locking lever 108 out of the locking hook 103 to complete the disassembly of the upper fixing frame 101 and the lower fixing frame 102, thus completing the disassembly of the device. The counterweight 9 makes the device more stable after installation and will not shake when the wind blows in the environment, further increasing the stability and safety of the device.
[0026] The working principle of this invention is: The device is evenly distributed along the cable using the installation device 1 to achieve full-line coverage monitoring. In the initial state at room temperature, the second spring 402, made of ordinary brass, has sufficient elasticity, pushing the limit rod 404 out of the inner wall of the limit cylinder 401. The first spring 204, made of nickel-based high-temperature alloy, is in a compressed, energy-storing state. Its elasticity is transmitted to the moving rod 205 via the sliding block 207, causing the moving block 206 to abut against the side walls of the limit rods 404 on both sides. At this time, the limit rods 404 on both sides form a lateral limiting constraint, preventing the axial displacement of the moving block 206 and the moving rod 205. The warning block 208 is stored in a low position inside the mounting housing 201, and the device maintains a stable, ready-to-be-triggered monitoring state. When a fire occurs nearby or the ambient temperature rises, the first spring 204 and the second spring 402 exhibit significantly different elasticity decays due to their different materials. According to the law of reduction, the elastic coefficient of the second spring 402, made of ordinary brass, decreases significantly with increasing temperature. Under the premise of constant deformation, the limiting thrust it provides is significantly weakened. On the other hand, the first spring 204, made of nickel-based high-temperature alloy, has excellent high-temperature resistance and its elastic coefficient decreases by a very small margin. Its elastic force loss is much lower than that of the second spring 402. When the temperature reaches the design trigger threshold, the elastic force of the first spring 204 breaks through the limiting resistance of the second spring 402, pushing the sliding block 207 to move axially. This causes the moving block 206 to squeeze the arc contact surfaces of the limiting rods 404 on both sides, forcing the limiting rods 404 to retract into the limiting cylinder 401. The limiting constraint is then released. Subsequently, the moving rod 205 is raised under the continuous drive of the first spring 204, pushing the warning block 208 at the top out of the mounting shell 201, thus completing the fire warning trigger.
[0027] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A cable distributed online fire monitoring and disconnection protection device, comprising two sets of installation devices (1), a monitoring device (2), and a disconnection device (3), characterized in that, The two sides of the monitoring device (2) are fixedly connected to the opposite sides of the two sets of installation devices (1), and the two sets of installation devices (1) are symmetrically arranged. The relatively far side of the disconnection device (3) is fixedly connected to the inside side of the monitoring device (2). The monitoring device (2) includes a mounting shell (201), a mounting cylinder (202), a mounting block (203), a first spring (204), a moving rod (205), and two limiting components (4) including a moving block (206). The mounting cylinder (202) is fixedly connected inside the mounting shell (201). The two sides of the mounting shell (201) are fixedly connected to the opposite sides of the two sets of mounting devices (1). The mounting block (203) is fixedly connected inside the mounting cylinder (202). One end of the first spring (204) is fixedly connected inside the mounting block (203). A sliding block (207) is slidably connected inside the mounting block (203). One side of the sliding block (207) is connected to the first spring. (204) One end of the moving rod (205) is fixedly connected to the side of the sliding block (207) away from the first spring (204). The moving block (206) is fixedly connected to the outer wall of the moving rod (205). The two limiting components (4) are fixedly connected to the side wall of the mounting cylinder (202). The outer wall of the moving block (206) is in contact with the opposite side of the two limiting components (4). The end of the moving rod (205) away from the moving block (206) is fixedly connected to a warning block (208). The opposite side of the disconnection device (3) is fixedly connected to the bottom opposite side of the mounting shell (201).
2. The cable distributed online fire monitoring and disconnection protection device according to claim 1, characterized in that, The limiting component (4) includes a limiting cylinder (401), a second spring (402), a moving block (403), and a limiting rod (404). The limiting cylinder (401) is fixedly connected to the side wall of the mounting cylinder (202). One end of the second spring (402) is fixedly connected to the bottom of the limiting cylinder (401), and the other end of the second spring (402) is fixedly connected to one side of the moving block (403). The moving block (403) is slidably connected to the limiting cylinder (401). The side of the moving block (403) away from the second spring (402) is fixedly connected to one end of the limiting rod (404). The outer side wall of the end of the limiting rod (404) away from the moving block (403) is in contact with the outer side wall of the moving block (206).
3. The cable distributed online fire monitoring and disconnection protection device according to claim 2, characterized in that, The first spring (204) is made of nickel-based high-temperature alloy, the second spring (402) is made of ordinary brass, and the outer wall of the moving block (403) and the outer wall of the moving block (206) are both arc-shaped.
4. The cable distributed online fire monitoring and disconnection protection device according to claim 3, characterized in that, The disconnection device (3) includes two placement cylinders (301), two third springs (302), two connecting blocks (303), and two cutting blades (304). The relatively far ends of the two placement cylinders (301) are respectively fixedly connected to the opposite sides of the bottom of the mounting shell (201). One end of each of the two third springs (302) is fixedly connected to the bottom of the two placement cylinders (301). The opposite sides of each of the two third springs (302) are respectively fixedly connected to one side of each of the two connecting blocks (303). The two connecting blocks (303) are respectively... The two connecting blocks (303) are slidably connected to the two placement cylinders (301). The side of the two connecting blocks (303) away from the two third springs (302) is fixedly connected to the side of the two cutting blades (304). The side of the two connecting blocks (303) near the sliding block (207) is fixedly connected to the top rod (305). The two sides of the connecting blocks (303) near the two top rods (305) are fixedly connected to the positioning rods (306). The relatively distant side of the two positioning rods (306) is respectively attached to the opposite side of the two top rods (305).
5. A cable distributed online fire monitoring and disconnection protection device according to claim 4, characterized in that, The mounting device (1) includes an upper fixing frame (101), a lower fixing frame (102), a locking hook (103), a locking block (104), and a fixing assembly (5). One side of the upper fixing frame (101) is fixedly connected to one side of the mounting shell (201), and one side of the upper fixing frame (101) is fitted against one side of the lower fixing frame (102). One side of the locking hook (103) is fixedly connected to the outer wall of the upper fixing frame (101), and one side of the locking block (104) is fixedly connected to the outer wall of the lower fixing frame (102). The locking block (104) is close to the locking hook. A locking groove (105) is provided on one side of the hook (103), and an installation groove (106) is provided on the side wall of the locking groove (105). A fourth spring (107) is fixedly connected to the bottom of the installation groove (106), and a locking rod (108) is fixedly connected to the bottom of the fourth spring (107) away from the installation groove (106). The locking hook (103) extends into the interior of the locking groove (105), and the locking rod (108) extends into the interior of the locking hook (103). The fixing component (5) is fixedly connected to the opposite side of the upper fixing frame (101) and the lower fixing frame (102).
6. The cable distributed online fire monitoring and disconnection protection device according to claim 5, characterized in that, The fixing component (5) includes multiple telescopic rods (501) and multiple fixed wheels (502). One end of each of the multiple telescopic rods (501) is fixedly connected to the opposite side of the upper fixing frame (101) and the lower fixing frame (102). The multiple fixed wheels (502) are fixedly connected to the ends of the multiple telescopic rods (501) away from the upper fixing frame (101) and the lower fixing frame (102). The outer side walls of the multiple fixed wheels (502) are provided with adapter grooves (503).
7. A cable distributed online fire monitoring and disconnection protection device according to claim 6, characterized in that, The mounting groove (106) has a through groove (6) on its side wall. The locking rod (108) is fixedly connected to a toggle rod (7) on the side near the through groove (6). The toggle rod (7) is slidably connected to the through groove (6). The locking rod (108) and the locking hook (103) are both arc-shaped on opposite sides.
8. The cable distributed online fire monitoring and disconnection protection device according to claim 7, characterized in that, A base plate (8) is fixedly connected to the bottom of the two lower fixed frames (102). A counterweight (9) is fixedly connected to the side of the base plate (8) away from the two lower fixed frames (102). The counterweight (9) is located at the center of the base plate (8).