A distributed optical fiber on-line temperature monitoring system

Abstract

The utility model relates to a kind of distributed optical fiber on-line temperature monitoring system, it is related to the field of belt feeder optical fiber detection, it includes temperature measuring mechanism, the temperature measuring mechanism includes temperature measuring optical fiber, multiple fixed components and temperature monitoring terminal, the fixed component includes fixed plate, the fixed plate is fixedly installed in the temperature position to be measured, through-hole is set up on the fixed plate, the temperature measuring optical fiber is arranged in the through-hole of the fixed plate, the temperature measuring optical fiber is signal connected with the temperature monitoring terminal. The utility model can monitor the temperature distribution of long distance belt feeder in real time.

Description

Technical Field

[0001] This utility model relates to the technical field of fiber optic detection for belt conveyors, and in particular to a distributed fiber optic online temperature monitoring system. Background Technology

[0002] With the development of the mining industry, belt conveyors, as crucial equipment for material transportation, are increasingly widely used in mining, coal, and other related sectors. However, due to prolonged operation and environmental factors, belt conveyors are prone to localized overheating during operation. These overheated spots can not only damage the conveyor but also potentially cause fires, posing a serious threat to production safety. Therefore, effective temperature monitoring of belt conveyors is of paramount importance.

[0003] Traditional temperature monitoring methods mainly include point sensor monitoring and infrared thermometer detection. While point sensors can directly measure the temperature at a specific location, their coverage is limited, making comprehensive monitoring difficult, and they are also complex to install and costly to maintain. Infrared thermometers can provide non-contact temperature measurement, but they are limited by line-of-sight requirements, cannot effectively adapt to complex industrial environments, and their accuracy is easily affected by external environmental factors.

[0004] Furthermore, neither of the above two methods can effectively monitor the overall temperature distribution of long-distance belt conveyors in real time, making it impossible to detect potential safety hazards in a timely manner.

[0005] Therefore, there is an urgent need for a temperature detection device suitable for use in long-distance transportation lines in mining areas at specific locations to solve the above-mentioned technical problems. Utility Model Content

[0006] In order to monitor the temperature distribution of long-distance belt conveyors in real time, this utility model provides a distributed fiber optic online temperature monitoring system.

[0007] This utility model provides a distributed optical fiber online temperature monitoring system, which adopts the following technical solution:

[0008] A distributed optical fiber online temperature monitoring system includes a temperature measuring mechanism, which includes a temperature measuring optical fiber, multiple fixed components, and a temperature monitoring terminal. Each fixed component includes a fixed plate, which is fixedly installed at the temperature to be measured. The fixed plate has a through hole, and the temperature measuring optical fiber passes through the through hole of the fixed plate. The temperature measuring optical fiber is signal-connected to the temperature monitoring terminal.

[0009] Preferably, the temperature measurement location includes at least the mounting brackets for the drive wheel and the driven wheel in the belt conveyor equipment.

[0010] Preferably, the temperature measurement location also includes the side position of the brake plate of the belt-driven braking device and / or the bottom position of the brake plate.

[0011] Preferably, the fixing component further includes a buffer pad disposed within the through hole of the fixing plate.

[0012] Preferably, the fixing plate is further provided with a flared opening, which communicates with the through hole.

[0013] Preferably, the temperature measuring mechanism further includes a guide assembly, which includes a guide frame and a guide roller. The guide frame is fixedly installed at the temperature to be measured position, and the two guide rollers are rotatably installed on the guide frame. A guide groove is formed on the roller surface of one of the guide rollers, and the temperature measuring optical fiber passes through the guide groove.

[0014] Preferably, the guide assembly further includes a locking rod and a locking nut. The first end of the locking rod is fixedly mounted on the guide frame, and the second end of the locking rod passes through the guide frame and is threadedly connected to the locking nut. The guide roller is rotatably sleeved on the locking rod, and an anti-slip soft layer is also provided on the roller surface of the guide roller.

[0015] Preferably, the temperature-measuring optical fiber includes a fiber core, and a buffer layer, a tensile layer, and a metal armor layer that are sequentially wrapped around the fiber core from the inside out.

[0016] Preferably, the temperature-measuring optical fiber further includes a waterproof coating, which is disposed between the fiber core and the buffer layer.

[0017] Preferably, the temperature-measuring optical fiber further includes a metal sealing layer and an outer protective layer, the metal sealing layer being disposed between the buffer layer and the tensile layer, and the outer protective layer being sleeved on the metal armor layer.

[0018] In summary, this utility model has at least one of the following beneficial technical effects:

[0019] 1. Utilizing the Raman scattering effect of the temperature-sensing optical fiber, the temperature at the measurement location is detected and fed back to the temperature monitoring terminal. The terminal determines whether the temperature at the measurement location is within the normal range. If the temperature is abnormal, it uploads an alarm message or issues an alert, allowing for timely shutdown or maintenance. This enables continuous spatial temperature measurement, timely capture of instantaneous temperature rises, and real-time monitoring of the overall temperature distribution of long-distance conveyor belts.

[0020] 2. Monitor the temperature of the friction pads on the brake plate. If the temperature is too high, reduce the belt speed or apply full braking in time to reduce the occurrence of belt friction fire, reduce the probability of brake failure or runaway accidents due to overheating, improve the operational safety of the belt conveyor, and make the temperature monitoring range of the device more comprehensive. Monitor the temperature at the bottom of the brake plate to compensate for the accuracy of side temperature monitoring and reduce the possibility that the temperature monitoring accuracy may be affected by the deposition of mineral powder on the side.

[0021] 3. When laying temperature-sensing optical fibers, workers can sequentially thread the fibers through multiple guide slots. The fibers are then installed over long distances on a conveyor belt using rotating guide rollers. This facilitates installation, improves installation efficiency, and allows for support from guide frames and rollers, reducing the possibility of fiber breakage during installation and enhancing safety.

[0022] 4. The fiber core can be made of germanium-doped quartz glass to improve optical signal transmission and Raman scattering. The buffer layer can be made of high-temperature resistant silicone rubber to absorb a certain amount of mechanical shock. The tensile layer can be made of aramid fiber bundles to further improve tensile strength. A metal armor layer is wrapped around the temperature-sensing fiber. The metal armor layer can be made of steel corrugated tube to improve the temperature-sensing fiber's resistance to compression, impact, and bending, thereby improving the safety of the temperature-sensing fiber. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the wiring of the temperature measuring mechanism according to an embodiment of the present utility model;

[0024] Figure 2 This is a schematic diagram of a fixed component installed on a braking device;

[0025] Figure 3 This is a cross-sectional view of the inside of the fixing plate;

[0026] Figure 4 This is a partial schematic diagram showing the location of the guide components;

[0027] Figure 5 This is a schematic diagram of the installation of guide components and fixing components on braking equipment;

[0028] Figure 6 This is a schematic diagram of installing fixed components on a conveying device;

[0029] Figure 7 This is a schematic diagram of the internal structure of the temperature-sensing optical fiber;

[0030] Figure 8 This is a partial schematic diagram of the temperature measurement fiber optic distribution network.

[0031] Explanation of reference numerals in the attached drawings: 100, Temperature measuring mechanism; 110, Temperature measuring optical fiber; 111, Fiber core; 112, Buffer layer; 113, Tensile layer; 114, Metal armor layer; 115, Waterproof coating; 116, Metal sealing layer; 117, Outer protective layer; 120, Fixing component; 121, Fixing plate; 122, Through hole; 123, Buffer pad; 124, Flared opening; 130, Temperature monitoring terminal; 140, Guide component; 141, Guide frame; 142, Guide roller; 143, Locking rod; 144, Locking nut; 145, Anti-slip soft layer; 146, Guide groove; 150, Temperature to be measured position; 151, Mounting bracket; 152, Braking plate. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1 To be continued Figure 8 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0033] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0034] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0037] This utility model discloses a distributed fiber optic online temperature monitoring system. (Refer to...) Figures 1 to 8 A distributed optical fiber online temperature monitoring system mainly includes a temperature measuring mechanism 100, which includes a temperature measuring optical fiber 110, multiple fixing components 120, and a temperature monitoring terminal 130. The fixing component 120 includes a fixing plate 121, which is fixedly installed at the temperature to be measured position 150. The fixing plate 121 has a through hole 122, and the temperature measuring optical fiber 110 passes through the through hole 122 of the fixing plate 121. The temperature measuring optical fiber 110 is connected to the temperature monitoring terminal 130 via signal.

[0038] Utilizing the Raman scattering effect of the temperature-sensing optical fiber 110, the temperature at the measurement location 150 is detected, and the temperature information is fed back to the temperature monitoring terminal 130. The temperature monitoring terminal 130 determines whether the temperature at the measurement location is within the normal range. If the temperature is abnormal, it uploads an alarm message or issues an alarm to promptly shut down or perform maintenance. Mechanical anchoring of the optical fiber is achieved through the through-holes 122 in the fixing plate 121, avoiding the loosening risk of traditional bundled installations. Multiple optical fibers run through all monitoring points, solving the blind spot problem of point sensors. Pure optical signal transmission meets the safety production requirements of mining areas. Continuous spatial temperature measurement is achieved, enabling timely capture of instantaneous temperature rises and real-time monitoring of the overall temperature distribution of long-distance conveyor belts.

[0039] Reference Figures 1 to 6 In some embodiments, the temperature measurement location 150 includes at least a mounting bracket 151 for the drive pulley and a mounting bracket 151 for the driven pulley in the belt conveyor. Since the drive pulley or driven pulley occupies a high-fault location on the belt conveyor, the bearings of the drive pulley or driven pulley have a high overheating rate, requiring targeted monitoring to improve the effectiveness of temperature monitoring.

[0040] Reference Figures 1 to 6In some embodiments, the temperature measurement location 150 also includes the side and / or bottom of the brake plate 152 of the belt conveyor brake. Temperature monitoring of the brake plate 152 of the belt conveyor brake enables early warning of brake failure. Monitoring the temperature of the friction pads on the side of the brake plate 152 allows for the reduction of belt speed or timely application of full braking when the temperature is too high, reducing the likelihood of belt friction-induced fires and the probability of brake failure or runaway accidents due to overheating, thus improving the operational safety of the belt conveyor and making the temperature monitoring range of the device more comprehensive. Temperature monitoring of the bottom of the brake plate 152 compensates for the accuracy of side temperature monitoring, reducing the possibility that mineral powder deposits on the side may affect the accuracy of temperature monitoring.

[0041] Reference Figure 3 In some embodiments, the fixing assembly 120 further includes a buffer pad 123 disposed within the through hole 122 of the fixing plate 121. The buffer pad 123 may be a silicone pad, used to absorb vibrations of the belt conveyor, reduce the possibility of signal attenuation or damage to the temperature measuring fiber 110 due to direct friction within the through hole 122, and improve the reliability of temperature monitoring.

[0042] Reference Figure 3 In some embodiments, the fixing plate 121 is further provided with a flared opening 124, which communicates with the through hole 122. The flared opening 124 is designed to prevent mineral powder from clogging the through hole 122, and at the same time, it makes it easier for workers to insert the temperature measuring optical fiber 110, facilitating the installation of the temperature measuring optical fiber 110. Increasing the contact area between the optical fiber and the air reduces the risk of local overheating.

[0043] Reference Figure 4 and Figure 5 In some embodiments, the temperature measuring mechanism 100 further includes a guide assembly 140, which includes a guide frame 141 and guide rollers 142. The guide frame 141 is fixedly installed at the temperature measurement position 150, and two guide rollers 142 are rotatably mounted on the guide frame 141. One of the guide rollers 142 has a guide groove 146 on its surface, and the temperature measuring optical fiber 110 passes through the guide groove 146. When laying the temperature measuring optical fiber 110, the worker can sequentially pass the temperature measuring optical fiber 110 through multiple guide grooves 146. The temperature measuring optical fiber 110 is installed over a long distance on the conveyor belt using the rotating guide rollers 142, which facilitates the installation of the temperature measuring optical fiber 110, improves the installation effect, and at the same time, the guide frame 141 and guide rollers 142 can support the temperature measuring optical fiber 110, reducing the possibility of breakage of the temperature measuring optical fiber 110 during installation and improving the safety of the installation process.

[0044] Reference Figure 4In some embodiments, the guide assembly 140 further includes a locking rod 143 and a locking nut 144. The first end of the locking rod 143 is fixedly mounted on the guide frame 141, and the second end of the locking rod 143 passes through the guide frame 141 and is threadedly connected to the locking nut 144. The guide roller 142 is rotatably sleeved on the locking rod 143, and an anti-slip soft layer 145 is also provided on the roller surface of the guide roller 142.

[0045] The anti-slip soft layer 145 provides a certain buffering protection for the temperature measuring fiber 110. When the temperature measuring fiber 110 is installed or needs temporary fixation, the operator rotates the locking nut 144, causing the guide frames 141 at both ends to clamp the guide roller 142, stopping the guide roller 142 from rotating. Under the action of the anti-slip soft layer 145, the temperature measuring fiber 110 is locked onto the guide roller 142, thus fixing the temperature measuring fiber 110. This reduces the possibility of slippage of the temperature measuring fiber 110 during use, especially in special installation environments such as tilting or turning of the conveyor belt, improving the protection effect of the temperature measuring fiber 110, extending the service life of the temperature measuring equipment, reducing the probability of maintenance, and ultimately reducing the operating cost of the equipment.

[0046] Reference Figure 7 In some embodiments, the temperature-sensing optical fiber 110 includes a fiber core 111, and a buffer layer 112, a tensile layer 113, and a metal armor layer 114 sequentially wrapped around the fiber core 111 from the inside out. The fiber core 111 can be made of germanium-doped silica glass to improve optical signal transmission and Raman scattering. The buffer layer 112 can be made of high-temperature resistant silicone rubber to absorb a certain amount of mechanical impact. The tensile layer 113 can be made of aramid fiber bundles to further improve tensile strength. A metal armor layer 114 is applied to the outer layer of the temperature-sensing optical fiber 110. The metal armor layer 114 can be made of steel corrugated tubing to improve the temperature-sensing optical fiber 110's resistance to compression, impact, and bending, thereby improving the safety of the temperature-sensing optical fiber 110 in use.

[0047] Reference Figure 7 In some embodiments, the temperature-sensing optical fiber 110 further includes a waterproof coating 115 disposed between the fiber core 111 and the buffer layer 112. The waterproof coating 115 can be made of acrylic resin to provide waterproofing and resistance to micro-bending loss.

[0048] Reference Figure 7In some embodiments, the temperature-sensing optical fiber 110 further includes a metal sealing layer 116 and an outer protective layer 117. The metal sealing layer 116 is disposed between the buffer layer 112 and the tensile layer 113, and the outer protective layer 117 is sleeved on the metal armor layer 114. The metal sealing layer 116 can be made of a copper or aluminum foil composite film to block hydrogen permeation, and the outer protective layer 117 can be made of flame-retardant polyurethane to improve its resistance to acid and alkaline mineral mud water, while also allowing for better contact with the anti-slip soft layer 145 and improving the locking effect.

[0049] The implementation principle of the distributed optical fiber online temperature monitoring system according to this utility model embodiment is as follows:

[0050] Reference Figure 8 By utilizing the Raman scattering effect of the temperature-sensing optical fiber 110, which is installed on the braking and conveying equipment of the belt conveyor, real-time and continuous spatial temperature measurement of the overall temperature distribution of the long-distance belt conveyor can be achieved. It can also promptly capture instantaneous temperature rises. When abnormal temperatures are detected, the system can automatically issue alarm messages or upload data for remote monitoring, ensuring timely shutdown or maintenance. Furthermore, for temperature monitoring of the friction plates on the brake plate 152, the system can automatically reduce the belt speed or apply full braking when the temperature is too high, effectively preventing brake failure or runaway accidents due to overheating and improving equipment operational safety. To enhance temperature monitoring accuracy, especially to avoid the influence of mineral powder deposits on the sides, a bottom temperature monitoring compensation mechanism is specifically designed. In terms of installation design, the long-distance laying process of the temperature-sensing optical fiber 110 is simplified by using guide grooves 146 and rotating guide rollers 142, while improving installation safety and effectiveness. The temperature-measuring optical fiber 110 adopts a multi-layer structure design consisting of a germanium-doped quartz glass fiber core 111, a high-temperature resistant silicone rubber buffer layer 112, an aramid fiber bundle braided tensile layer 113, and a steel corrugated tube metal armor layer 114, which significantly improves the mechanical strength and environmental adaptability of the optical fiber and ensures the stability and reliability of the system.

[0051] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A distributed optical fiber online temperature monitoring system, characterized in that: The device includes a temperature measuring mechanism (100), which includes a temperature measuring fiber (110), multiple fixing components (120), and a temperature monitoring terminal (130). The fixing component (120) includes a fixing plate (121), which is fixedly installed at the temperature to be measured position (150). The fixing plate (121) has a through hole (122), and the temperature measuring fiber (110) passes through the through hole (122) of the fixing plate (121). The temperature measuring fiber (110) is connected to the temperature monitoring terminal (130) via a signal.

2. The distributed optical fiber online temperature monitoring system according to claim 1, characterized in that: The temperature measurement location (150) includes at least the mounting bracket (151) of the driving wheel and the mounting bracket (151) of the driven wheel in the belt conveyor equipment.

3. The distributed optical fiber online temperature monitoring system according to claim 2, characterized in that: The temperature measurement location (150) also includes the side position and / or the bottom position of the brake plate (152) of the belt-driven braking equipment.

4. The distributed optical fiber online temperature monitoring system according to claim 1, characterized in that: The fixing component (120) also includes a buffer pad (123), which is disposed within the through hole (122) of the fixing plate (121).

5. The distributed optical fiber online temperature monitoring system according to claim 4, characterized in that: The fixing plate (121) is also provided with a flared opening (124), which is connected to the through hole (122).

6. The distributed optical fiber online temperature monitoring system according to any one of claims 1-5, characterized in that: The temperature measuring mechanism (100) further includes a guide assembly (140), which includes a guide frame (141) and a guide roller (142). The guide frame (141) is fixedly installed at the temperature to be measured position (150). The two guide rollers (142) are rotatably installed on the guide frame (141), and a guide groove (146) is provided on the roller surface of one of the guide rollers (142). The temperature measuring optical fiber (110) passes through the guide groove (146).

7. The distributed optical fiber online temperature monitoring system according to claim 6, characterized in that: The guide assembly (140) further includes a locking rod (143) and a locking nut (144). The first end of the locking rod (143) is fixedly installed on the guide frame (141), and the second end of the locking rod (143) passes through the guide frame (141) and is threadedly connected to the locking nut (144). The guide roller (142) is rotatably sleeved on the locking rod (143), and an anti-slip soft layer (145) is also provided on the roller surface of the guide roller (142).

8. The distributed optical fiber online temperature monitoring system according to claim 6, characterized in that: The temperature-measuring optical fiber (110) includes a fiber core (111), and a buffer layer (112), a tensile layer (113), and a metal armor layer (114) that are wrapped around the fiber core (111) from the inside out.

9. The distributed optical fiber online temperature monitoring system according to claim 8, characterized in that: The temperature-measuring optical fiber (110) also includes a waterproof coating (115), which is disposed between the fiber core (111) and the buffer layer (112).

10. The distributed optical fiber online temperature monitoring system according to claim 9, characterized in that: The temperature measuring optical fiber (110) also includes a metal sealing layer (116) and an outer protective layer (117). The metal sealing layer (116) is disposed between the buffer layer (112) and the tensile layer (113), and the outer protective layer (117) is sleeved on the metal armor layer (114).

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