Distributed optical fiber temperature sensing device for preventing fire

Abstract

The utility model discloses a distributed optical fiber temperature sensing device for fire prevention. The distributed optical fiber temperature sensing device comprises an optical fiber temperature sensing host. A temperature sensing optical fiber is arranged on the rear side of the optical fiber temperature sensing host, a metal seat is movably clamped on the outer arc surface of the temperature sensing optical fiber, a fixing shell is movably clamped at the upper end of the metal seat, a rubber pressing strip is arranged on the upper side wall of the fixing shell and located on the upper side of the temperature sensing optical fiber, and rubber seats are arranged at the left end and the right end of the metal seat; the distributed optical fiber temperature sensing device comprises an optical fiber temperature sensing host and a fire alarm controller, the fire alarm controller is located on the right side of the optical fiber temperature sensing host, and the output end of the optical fiber temperature sensing host is electrically connected with the input end of the fire alarm controller. The distributed optical fiber temperature sensing device can be in close contact with a temperature measurement position and has a good heat conduction effect, so that the temperature detection is accurate and rapid, and the distributed optical fiber temperature sensing device has a good prediction effect on fire prevention.

Description

Technical Field

[0001] This utility model relates to the field of fire prevention technology, specifically a distributed fiber optic temperature sensing device for fire prevention. Background Technology

[0002] As we all know, fire poses a huge threat to human life. Effective preventive measures can significantly reduce the probability of fires, thereby protecting people's lives, preventing injuries or deaths, and reducing grief for families and society. Distributed fiber optic temperature sensing devices are used in fire prevention and are widely used in rail transit, urban integrated pipe corridors, tunnels, steel, power, and petrochemical industries. Existing distributed fiber optic temperature sensing devices generally consist of a fiber optic temperature sensing host and a temperature-sensing fiber. The temperature-sensing fiber has a relatively long length. The fiber optic temperature sensing host uses optical time-domain reflectometry and the temperature-sensitive characteristics of Raman spectroscopy scattered light to detect temperature changes at different locations along the fiber, achieving distributed measurement. The temperature-sensing fiber is usually bundled to the cable to be detected with cable ties. Excessive bundling can easily cause the temperature-sensing fiber to break. When the bundling force is too small, the contact area between the temperature-sensing fiber and the cable is small, and the cable conducts heat to the temperature-sensing fiber through the air, resulting in poor heat conduction. Consequently, the temperature detection speed is slow and the accuracy is not high, thus affecting the effectiveness of fire prevention. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a distributed fiber optic temperature sensing device for fire prevention. The temperature sensing fiber is fixed by a metal shell, which can make close contact with the temperature measuring position and has good thermal conductivity, thus enabling accurate and rapid temperature detection. The distributed fiber optic temperature sensing device has a good predictive effect for fire prevention and can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a distributed fiber optic temperature sensing device for fire prevention, comprising a fiber optic temperature sensing host;

[0005] Fiber optic temperature sensing host: A temperature sensing fiber is provided on its rear side. A metal seat is movably attached to the outer arc surface of the temperature sensing fiber. A fixed shell is movably attached to the upper end of the metal seat. A rubber pressure strip is provided on the upper side wall of the fixed shell. The rubber pressure strip is located on the upper side of the temperature sensing fiber. Rubber seats are provided at both ends of the metal seat. A positioning groove is opened in the middle of the front and rear inner side walls of the fixed shell.

[0006] The system also includes a fire alarm controller, which is located to the right of the fiber optic temperature sensing unit. The output end of the fiber optic temperature sensing unit is electrically connected to the input end of the fire alarm controller, and the input end of the fiber optic temperature sensing unit is electrically connected to an external electrical connection. The temperature sensing fiber is fixed by a metal shell, which allows for close contact with the temperature measurement location and provides good thermal conductivity, resulting in accurate and rapid temperature detection. The system also provides good fixation for the temperature sensing fiber. The distributed fiber optic temperature sensing device has a good predictive effect for fire prevention.

[0007] Furthermore, the upper surface of the rubber strip has uniformly distributed strip-shaped openings at both ends, and the lower ends of the two rubber seats have uniformly distributed strip-shaped openings to increase elasticity.

[0008] Furthermore, the metal base has arc-shaped protrusions on both the front and rear sides of the middle section, which are movably engaged with the fixed shell to facilitate the fixing of the fixed shell.

[0009] Furthermore, the metal base has positioning strips in the middle of the front and rear sides at the upper end, and the positioning strips are movably inserted into the vertically corresponding positioning grooves to facilitate the lateral positioning of the metal base and the fixed shell.

[0010] Furthermore, flat grooves are provided on both the front and rear sides of the lower end of the fixed shell to facilitate the prying up and opening of the fixed shell.

[0011] Furthermore, the lower surface of the fixed shell is provided with a silicone thermal pad, which has a certain elasticity to reduce the gap between the contact surfaces.

[0012] Furthermore, a lifting ring is provided in the middle of the upper surface of the fixed shell, and cable tie grooves are provided at both the left and right ends of the upper surface of the fixed shell. Fixed feet are provided on both the front and rear sides of the fixed shell to facilitate the fixing of the metal base.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This distributed fiber optic temperature sensing device for fire prevention has the following advantages:

[0014] 1. Its temperature-sensing optical fiber is fixed by a metal shell, which can make close contact with the temperature measurement position and has good thermal conductivity, thus making the temperature detection accurate and fast. The distributed optical fiber temperature sensing device has a good predictive effect for fire prevention.

[0015] 2. The temperature-sensing optical fiber is fixed by the shell structure, and the upper side and both ends of the shell are positioned with the help of flexible rubber, which can avoid pressure damage when fixing the temperature-sensing optical fiber. The cable tie groove can position the cable tie to prevent slippage. The distributed optical fiber temperature sensing device is easy to fix and convenient to use. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is an enlarged structural diagram of point A in this utility model;

[0018] Figure 3 This is a cross-sectional view of the fixing shell of this utility model.

[0019] In the diagram: 1. Fiber optic temperature sensing host, 2. Temperature sensing fiber, 3. Fire alarm controller, 4. Metal base, 5. Fixing shell, 6. Rubber pressure strip, 7. Silicone heat-conducting pad, 8. Fixing foot, 9. Strip opening one, 10. Rubber base, 11. Strip opening two, 12. Positioning groove, 13. Positioning strip, 14. Arc-shaped protrusion, 15. Lifting ring, 16. Cable tie groove, 17. Flat groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-3 This embodiment provides a technical solution: a distributed fiber optic temperature sensing device for fire prevention, including a fiber optic temperature sensing host 1;

[0022] Fiber optic temperature sensing unit 1: It has a temperature-sensing fiber 2 at its rear, with a length of less than 10 kilometers. The fiber optic cable 2 acts as a sensing element. When the temperature changes, its internal physical properties (such as refractive index and light scattering) change. These changes alter the transmission characteristics of the optical signal (such as light intensity, phase, and wavelength) within the fiber optic cable 2. By detecting these changes in the optical signal, the fiber optic temperature sensing unit 1 can deduce the amount of temperature change, thus achieving temperature measurement. The fiber optic temperature sensing unit 1 detects temperature changes at different locations along the fiber optic cable 2, enabling distributed measurement. When an abnormal temperature is detected, the fiber optic temperature sensing unit 1 sends an electrical signal to the backend server, facilitating timely troubleshooting by maintenance personnel. A metal base 4 is movably attached to the outer arc surface of the temperature-sensing optical fiber 2. A fixing shell 5 is movably attached to the upper end of the metal base 4. A rubber strip 6 is provided on the upper side wall of the fixing shell 5. The rubber strip 6 is located on the upper side of the temperature-sensing optical fiber 2. The temperature-sensing optical fiber 2 is deployed to the location where temperature measurement is required. During deployment, the temperature-sensing optical fiber 2 is inserted into the interior of the metal base 4 according to the usage requirements. Then, the fixing shell 5 is inserted into the upper end of the metal base 4. The rubber strip 6 compresses the temperature-sensing optical fiber 2, and the outer arc surface of the temperature-sensing optical fiber 2 contacts the inner arc wall of the metal base 4. The metal base 4 is a copper or aluminum alloy base with good thermal conductivity, which facilitates heat transfer and ensures fast and accurate temperature measurement. Rubber seats 10 are provided at both ends of the metal base 4. The rubber seats 10 have good elasticity and can prevent excessive bending of the temperature-sensing optical fiber 2. Cable ties are used to bundle the cable, metal base 4, and fixing shell 5. During bundling, the cable ties pass through the cable tie groove 16, which positions the cable ties to ensure a secure fixation. The upper surface of the rubber pressure strip 6 has evenly distributed strip-shaped openings 9 at both ends, facilitating the elastic deformation of the rubber pressure strip 6. The lower ends of the two rubber bases 10 have evenly distributed strip-shaped openings 11, facilitating the elastic deformation of the rubber bases 10. The metal base 4 has arc-shaped protrusions 14 at both ends of its front and rear sides, which are movably engaged with the fixing shell 5, facilitating the vertical fixation of the fixing shell 5. Positioning strips 13 are located in the middle of the front and rear sides of the upper end of the metal base 4. The fixing shell 5 has positioning strips 13 in the middle of its front and rear inner walls. Each part is provided with a positioning groove 12, and the positioning strips 13 are movably inserted into the vertically corresponding positioning grooves 12. The positioning strips 13 and positioning grooves 12 facilitate the lateral positioning of the metal base 4 and the fixed shell 5. Flat grooves 17 are provided on both the front and rear sides of the lower end of the fixed shell 5. The flat grooves 17 facilitate the prying and opening of the fixed shell 5. A silicone thermal pad 7 is provided on the lower surface of the fixed shell 5. The silicone thermal pad 7 on the lower surface of the metal base 4 is in close contact with the temperature measuring position. The silicone thermal pad 7 has a certain elasticity and good thermal conductivity, which can reduce contact gaps and improve the heat conduction effect. A lifting ring 15 is provided in the middle of the upper surface of the fixed shell 5. Cable ties can be passed through the lifting ring 15 to connect to the fixed position, which can suspend the temperature sensing fiber optic 2. Cable tie grooves 16 are provided on both the left and right ends of the upper surface of the fixed shell 5.The front and rear sides of the mounting housing 5 are equipped with mounting feet 8, which are connected to the housing at the temperature measuring position using screws passing through the round holes of the mounting feet 8.

[0023] It also includes a fire alarm controller 3, which is located to the right of the fiber optic temperature sensing host 1. The output end of the fiber optic temperature sensing host 1 is electrically connected to the input end of the fire alarm controller 3, and the input end of the fiber optic temperature sensing host 1 is electrically connected to an external electrical connection to send an electrical signal to the fire alarm controller 3. The fire alarm controller 3 then alarms and controls the fire extinguishing device to work, thereby achieving fire prevention.

[0024] The working principle of the distributed fiber optic temperature sensing device for fire prevention provided by this utility model is as follows: In use, the temperature-sensing fiber 2 is laid out at the location where temperature measurement is required. During installation, the temperature-sensing fiber 2 is inserted into the metal base 4 according to the usage requirements. Then, the fixing shell 5 is inserted into the upper end of the metal base 4. The rubber strip 6 compresses the temperature-sensing fiber 2, causing the outer arc surface of the temperature-sensing fiber 2 to contact the inner arc wall of the metal base 4. Then, the silicone thermal pad 7 on the lower surface of the metal base 4 is in close contact with the temperature measurement position. The metal base 4 is made of copper or aluminum alloy, which has good thermal conductivity, facilitating heat transfer and ensuring fast and accurate temperature measurement. The metal base 4 is then fixed. Cable ties can be used to bundle the cable, metal base 4, and fixing shell 5. When bundling, the cable ties pass through the cable tie groove 16 to ensure a secure fixation. Alternatively, screws can be used to connect the fixing feet 8 through the round holes to the shell at the temperature measurement position. When no contact is needed, cable ties can be used to pass through the lifting ring 1. 5. Connected to a fixed location, the temperature-sensing fiber optic cable 2 can be hoisted. The length of the temperature-sensing fiber optic cable 2 is within 10 kilometers. As a sensing element, when the temperature of the temperature-sensing fiber optic cable 2 is affected by temperature changes, its internal physical properties (such as refractive index, light scattering, etc.) will change. These changes will cause changes in the transmission characteristics of the light signal in the temperature-sensing fiber optic cable 2 (such as light intensity, phase, wavelength, etc.). By detecting these changes in light signals, the fiber optic temperature sensing host 1 can deduce the amount of temperature change, thereby realizing temperature measurement. The fiber optic temperature sensing host 1 detects temperature changes at different locations along the temperature-sensing fiber optic cable 2, realizing distributed measurement. When an abnormal temperature is detected, the fiber optic temperature sensing host 1 sends an electrical signal to the back-end server, which facilitates timely troubleshooting by maintenance personnel. When an excessively high temperature is detected, an electrical signal is sent to the fire alarm controller 3, which then alarms and controls the fire extinguishing device to operate, thereby achieving fire prevention.

[0025] It is worth noting that the fiber optic temperature sensing host 1 and the fire alarm controller 3 disclosed in the above embodiments can be freely configured according to the actual application scenario. The fiber optic temperature sensing host 1 can be a fiber optic temperature sensing host of model XD-DTS-101M, and the fire alarm controller 3 can be a fire alarm controller of model JB-QB-GST200H-S. The fiber optic temperature sensing host 1 controls the operation of the temperature sensing fiber 2 and the fire alarm controller 3 using methods commonly used in the prior art.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A distributed fiber optic temperature sensing device for fire prevention, characterized in that: Including fiber optic temperature sensing unit (1); Fiber optic temperature sensing host (1): A temperature sensing fiber (2) is provided on its rear side. A metal seat (4) is movably attached to the outer arc surface of the temperature sensing fiber (2). A fixed shell (5) is movably attached to the upper end of the metal seat (4). A rubber strip (6) is provided on the upper side wall of the fixed shell (5). The rubber strip (6) is located on the upper side of the temperature sensing fiber (2). Rubber seats (10) are provided on both the left and right ends of the metal seat (4). Cable tie grooves (16) are provided on both the left and right ends of the upper surface of the fixed shell (5). Among them, it also includes a fire alarm controller (3), which is located on the right side of the fiber optic temperature sensing host (1). The output end of the fiber optic temperature sensing host (1) is electrically connected to the input end of the fire alarm controller (3), and the input end of the fiber optic temperature sensing host (1) is electrically connected to an external electrical connection.

2. A distributed fiber optic temperature sensing device for fire prevention according to claim 1, characterized in that: The upper surface of the rubber strip (6) has uniformly distributed strip-shaped openings (9) at both ends, and the lower ends of the two rubber seats (10) have uniformly distributed strip-shaped openings (11).

3. A distributed fiber optic temperature sensing device for fire prevention according to claim 1, characterized in that: The metal base (4) has arc-shaped protrusions (14) on both the front and rear sides of the middle, and the arc-shaped protrusions (14) are movably engaged with the fixed shell (5).

4. A distributed fiber optic temperature sensing device for fire prevention according to claim 1, characterized in that: The metal base (4) has a positioning strip (13) in the middle of the front and rear sides at the top, and the fixing shell (5) has a positioning groove (12) in the middle of the front and rear inner walls. The positioning strip (13) is movably inserted into the vertically corresponding positioning groove (12).

5. A distributed fiber optic temperature sensing device for fire prevention according to claim 1, characterized in that: Flat grooves (17) are provided on both the front and rear sides of the lower end of the fixed shell (5).

6. A distributed fiber optic temperature sensing device for fire prevention according to claim 1, characterized in that: The lower surface of the fixed shell (5) is provided with a silicone thermal pad (7).

7. A distributed fiber optic temperature sensing device for fire prevention according to claim 1, characterized in that: The upper surface of the fixed shell (5) is provided with a lifting ring (15) in the middle, and the front and rear sides of the fixed shell (5) are provided with fixing feet (8).

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