A distributed fiber optic temperature sensor detection device

Abstract

The application relates to the technical field of temperature sensor detection, in particular to a distributed optical fiber temperature sensor detection device. The device comprises a shell, the inside of the shell is provided with a detection cavity, two guide openings which are symmetrical and communicate with the outside are arranged in the detection cavity, two guide rollers are fixed on the outer wall of the shell, a temperature measuring optical fiber is arranged between the guide rollers, a heat insulation inner tube is jointly arranged in the two guide openings, a temperature sensing contact is fixed on the inner wall of the heat insulation inner tube, one end of the heat insulation inner tube is fixed with the outer wall of the shell, a heat insulation sleeve is rotationally connected to the outer wall of the heat insulation inner tube, and through holes are arranged on the surfaces of the heat insulation sleeve and the heat insulation inner tube. When the position of the temperature measuring optical fiber is adjusted, the temperature measuring optical fiber can be isolated, and the adverse influence of external temperature on the temperature in the detection cavity is reduced.

Description

Technical Field

[0001] This invention relates to the field of temperature sensor detection, and more particularly to a distributed optical fiber temperature sensor detection device. Background Technology

[0002] Temperature-sensing optical fiber is the core sensing element of fiber optic temperature sensors, used to sense temperature changes. It utilizes effects such as Raman scattering, where temperature changes alter the characteristics of the backscattered light generated in the optical fiber. Temperature information is obtained by analyzing these changes in optical signals. For example, when monitoring the temperature of power cables, temperature-sensing optical fiber is laid along the cable to sense the temperature at various locations in real time.

[0003] Utility model patent with publication number CN221224038U discloses a testing tool for a temperature measuring optical fiber, including a heating box. The heating boxes are arranged in pairs, and several heating tubes are arranged on the upper part of the inner wall of each heating box. The two ends of the heating tubes are fixedly connected to the heating box respectively. Fixed seats are symmetrically arranged inside the heating box, and a locking roller is arranged between the two fixed seats. A limit groove is formed on the circumference of the middle position of the locking roller. A drive motor is arranged on one side of each of the two fixed seats.

[0004] In existing technologies, during the detection of temperature-measuring optical fibers, gas inside the detection equipment may flow out from the entry or exit point as the fiber enters or exits. This gas outflow causes a local temperature drop, creating a temperature gradient within the detection equipment. This results in different parts of the fiber experiencing different temperatures, complicating the changes in the optical signal and interfering with the accurate assessment of the fiber's performance. Especially for high-precision temperature detection requirements, the error caused by this temperature gradient may render the detection results meaningless. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a distributed fiber optic temperature sensor detection device.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a distributed optical fiber temperature sensor detection device, comprising a housing, an internal detection cavity, two symmetrically arranged guide ports communicating with the outside within the detection cavity, two guide rollers fixed on the outer wall of the housing, a temperature-sensing optical fiber inserted between the guide rollers, a heat-insulating inner tube inserted into both guide ports, a temperature-sensing contact fixed on the inner wall of the heat-insulating inner tube, one end of the heat-insulating inner tube fixed to the outer wall of the housing, and a heat-insulating sleeve rotatably connected to the outer wall of the heat-insulating inner tube. Both the outer casing and the inner insulating tube have through holes on their surfaces. A driving assembly is provided on the outer wall of the shell. The driving assembly is used to drive the heat insulation casing to rotate in the forward direction, so that the through holes on the heat insulation casing and the through holes on the inner insulating tube are closed alternately. An equipment cavity is provided below the detection cavity. A hot air fan is fixed on the inner wall of the equipment cavity. The air outlet of the hot air fan is connected to the inside of the detection cavity. An exhaust port is provided at the top of the detection cavity. The exhaust port is connected to the inside of the equipment cavity through a pipe. Both ends of the inner insulating tube are provided with sealing assemblies for sealing the ports of the inner insulating tube.

[0007] Preferably, the inner top surface of the detection cavity is arc-shaped, a guide block is fixed inside the detection cavity, the guide block is located below the heat insulation sleeve, a guide groove that runs vertically through the inside of the guide block, and multiple air inlet grooves are evenly formed on the top surface of the equipment cavity along the bottom edge of the guide groove.

[0008] Preferably, the equipment cavity is cylindrical, and a partition is fixed in the middle of the equipment cavity, which divides the equipment cavity into a guide cavity and an installation cavity. The guide cavity is located above the installation cavity. An installation hole is opened in the middle of the top surface of the partition. A hemispherical guide block is fixed on the inner top surface of the guide cavity. The hot air blower is fixed on the inner wall of the installation cavity. The air outlet of the hot air blower is fixedly connected to the installation hole through a pipe. An air inlet is opened in the installation cavity at the air inlet position away from the hot air blower.

[0009] Preferably, the through hole includes an air inlet and an air outlet, the number of which are the same. The air outlet is located above the air inlet. A first adjustment groove and a second adjustment groove are provided on the outer wall of the heat insulation sleeve. The driving assembly is also used to drive the heat insulation sleeve to rotate in the opposite direction, so that the first adjustment groove is connected to the air outlet of the heat insulation inner tube, and the second adjustment groove is connected to the air inlet of the heat insulation inner tube.

[0010] Preferably, the inner heat-insulating tube is provided with a plurality of flexible baffles, which are positioned above the corresponding air inlets. The flexible baffles have a recessed guide surface on the side near the air inlet. A bracket is fixed inside the air inlet, and a connector is provided between the bracket and the flexible baffle. The connector is used to rotatably connect the flexible baffle to the bracket.

[0011] Preferably, a plurality of flexible guide strips are fixed on the guide surface, and the guide strips are in an inclined state.

[0012] Preferably, an electromagnet is fixed on the inner wall of the second adjusting groove. The connecting member includes a sleeve, the top of which is fixed to the inner top surface of the flexible baffle. A support rod is inserted inside the sleeve, the top end of which passes through the flexible baffle and extends outward. Multiple arc-shaped rods are fixed on the top side wall of the support rod, and the ends of the arc-shaped rods are hinged to the top edge of the flexible baffle. A rotating disk is fixed at the bottom end of the support rod, and the rotating disk is rotatably connected to the bracket. A spring is fixed between the sleeve and the rotating disk, and the spring is sleeved on the outside of the support rod. Multiple sliding rods are fixed on the outer wall of the sleeve, and the bottom ends of the sliding rods pass through the rotating disk and are collectively fixed to an adsorption plate.

[0013] Preferably, the sealing assembly includes a sealing airbag and an air pump. The sealing airbag is fixed on the inner wall of the heat-insulating inner tube, and the sealing airbag is annular and sleeved on the outside of the temperature-measuring optical fiber. The air pump is fixed on the inner wall of the heat-insulating inner tube, and the air outlet of the air pump is connected to the inside of the sealing airbag through a pipe.

[0014] Preferably, the air pump's suction end is connected to the inside of the detection chamber via a pipe. The sealing airbag includes a fixing part and a squeezing part. The fixing part is made of rigid material and is fixed to the heat-insulating inner tube. The squeezing part is made of flexible material and is in contact with the temperature-measuring optical fiber. A slot is provided at one end of the fixing part near the inner side of the heat-insulating inner tube, and an adjusting valve is fixed in the slot.

[0015] Preferably, the drive assembly includes a first gear, a second gear, and a motor. The first gear is sleeved and fixed on the outside of the heat insulation sleeve, the motor is fixed on the outer wall of the housing, the output shaft of the motor is fixed to the second gear, and the second gear meshes with the first gear.

[0016] Compared with the prior art, the present invention has the following beneficial effects: First, when adjusting the position of the temperature-sensing fiber, the fiber can be isolated to reduce the adverse effects of external temperature on the internal temperature of the detection chamber. Furthermore, both the heat-insulating sleeve and the heat-insulating inner tube are made of heat-insulating materials, which can also reduce heat loss. Although some external gas remains in the heat-insulating inner tube when the through hole is opened, the space inside the heat-insulating inner tube is small, so even if the residual gas enters the detection chamber, its impact on the internal temperature of the detection chamber is minimal.

[0017] Second, by setting a flexible baffle above the air inlet to block the incoming airflow, and setting a guide surface on the flexible baffle to guide and disperse the airflow, the airflow is prevented from directly impacting the surface of the temperature measuring fiber, thus avoiding uneven heating of the surface of the temperature measuring fiber. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention.

[0020] Figure 3 This is a cross-sectional structural diagram of the heat-insulating inner tube, heat-insulating sleeve, and guide block of the present invention.

[0021] Figure 4 This is a schematic diagram of the flexible baffle structure of the present invention.

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the flexible baffle of the present invention.

[0023] Figure 6 This is a schematic cross-sectional view of the heat-insulating inner tube and heat-insulating sleeve of the present invention. Figure 1 .

[0024] Figure 7 This is a schematic cross-sectional view of the heat-insulating inner tube and heat-insulating sleeve of the present invention. Figure 2 .

[0025] In the diagram: 1. Shell; 2. Detection chamber; 3. Guide port; 4. Guide roller; 5. Insulated inner tube; 6. Temperature sensor contact; 7. Insulated sleeve; 8. Through hole; 9. Equipment cavity; 10. Hot air blower; 11. Exhaust port; 12. Guide block; 13. Guide through groove; 14. Air inlet through groove; 15. Partition plate; 16. Guide cavity; 17. Mounting cavity; 18. Mounting hole; 19. Guide block; 20. Air inlet; 21. Air inlet hole; 22. Exhaust hole; 23. First 24. Adjusting groove; 25. Second adjusting groove; 26. Flexible baffle; 27. Guide surface; 28. Guide strip; 29. ​​Electromagnet; 30. Sleeve; 31. Support rod; 32. Arc rod; 33. Rotating disk; 34. Spring; 35. Slide rod; 36. Adsorption plate; 37. Sealing airbag; 38. Air pump; 39. Fixing part; 40. Extrusion part; 41. Slot; 42. Adjusting valve; 43. First gear; 44. Second gear; 45. Motor; 46. Bracket. Detailed Implementation

[0026] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0027] like Figures 1 to 7 The distributed fiber optic temperature sensor detection device shown includes a housing 1, with a detection cavity 2 inside the housing 1. Two guide ports 3, symmetrically arranged inside the detection cavity 2, communicate with the outside. Two guide rollers 4 are fixed to the outer wall of the housing 1, and a temperature-sensing fiber optic cable is inserted between the guide rollers 4. A heat-insulating inner tube 5 is inserted into both guide ports 3. A temperature-sensing contact 6 is fixed to the inner wall of the heat-insulating inner tube 5. One end of the heat-insulating inner tube 5 is fixed to the outer wall of the housing 1. A heat-insulating sleeve 7 is rotatably connected to the outer wall of the heat-insulating inner tube 5. Both the surface of the heat-insulating sleeve 7 and the heat-insulating inner tube 5 are open. The housing 1 has a through hole 8 and a drive assembly on its outer wall. The drive assembly is used to drive the heat insulation sleeve 7 to rotate in the forward direction, so that the through hole 8 on the heat insulation sleeve 7 and the through hole 8 on the heat insulation inner tube 5 are closed alternately. The detection chamber 2 is provided with an equipment chamber 9 below it. A hot air blower 10 is fixed on the inner wall of the equipment chamber 9. The air outlet of the hot air blower 10 is connected to the inside of the detection chamber 2. An exhaust port 11 is provided at the top of the detection chamber 2. The exhaust port 11 is connected to the inside of the equipment chamber 9 through a pipe. Both ends of the heat insulation inner tube 5 are provided with sealing assemblies for sealing the ports of the heat insulation inner tube 5.

[0028] Specifically, the temperature-sensing optical fiber is connected to an external temperature-sensing device. The fiber is then inserted from one end of the guide port 3, entering the detection chamber 2 and passing through the inner heat-insulating tube 5 before exiting from the other guide port 3. Guide rollers 4 are positioned at both guide ports 3 to guide and support the fiber, preventing bending during testing and ensuring accurate results. During fiber insertion, the through-holes 8 on the heat-insulating sleeve 7 and the inner heat-insulating tube 5 are closed to prevent external gas from entering the detection chamber 2 through the through-holes 8, thus preventing heat loss. After the fiber is positioned, the sealing assembly seals both ends of the inner heat-insulating tube 5. Then, the drive assembly rotates the heat-insulating sleeve 7 in the opposite direction, connecting the through-holes 8 on the sleeve and the inner heat-insulating tube 5. This allows the inner heat-insulating tube 5 to connect with the detection chamber 2, enabling the hot air from the detection chamber 2 to enter the inner heat-insulating tube 5 through the through-holes 8. Inside, the residual external gas is discharged, and the inside of the heat-insulating inner tube 5 is heated. During the process of the gas inside the heat-insulating inner tube 5 heating up, the temperature inside the heat-insulating inner tube 5 is monitored in real time by the temperature sensing contact 6 to obtain a first temperature value. When the temperature reaches the set value, the external temperature measuring device can detect the temperature inside the heat-insulating inner tube 5 through the temperature measuring optical fiber to obtain a second temperature value. When the first temperature value and the second temperature value are the same, it indicates that there is no abnormality in that section of the temperature measuring optical fiber. When the first temperature value and the second temperature value are different, it indicates that there is an abnormality in that section of the temperature measuring optical fiber. In this embodiment, when adjusting the position of the temperature measuring optical fiber, the temperature measuring optical fiber can be isolated, reducing the adverse effect of the external temperature on the internal temperature of the detection cavity 2. In addition, both the heat-insulating sleeve 7 and the heat-insulating inner tube 5 are made of heat-insulating material, which can also reduce heat loss. Although some external gas remains in the heat-insulating inner tube 5 when the through hole 8 is opened, the space inside the heat-insulating inner tube 5 is small. Therefore, even if the residual gas enters the detection cavity 2, the impact on the internal temperature of the detection cavity 2 is small.

[0029] As a further embodiment of the present invention, the inner top surface of the detection cavity 2 is arc-shaped, and a guide block 12 is fixed inside the detection cavity 2. The guide block 12 is located below the heat insulation sleeve 7. A guide groove 13 that runs vertically through the inside of the guide block 12 is provided. Multiple air inlet grooves 14 are evenly provided on the top surface of the equipment cavity 9 along the bottom edge of the guide groove 13.

[0030] Specifically, the hot airflow passes through the intake channel 14 and enters the guide channel 13. Since the intake channel 14 is evenly distributed along the bottom edge of the guide channel 13, the hot airflow can flow upwards along the inner wall of the guide channel 13. This layout allows the incoming hot airflow to be evenly dispersed around the bottom perimeter of the guide channel 13, preventing it from concentrating in one spot and ensuring the uniformity of its initial distribution. This lays the foundation for a stable and orderly flow later. Furthermore, the guide channel 13 has a structure that is wider at the bottom and narrower at the top, resembling a constricted channel. When the hot airflow enters from the larger opening at the bottom, as the channel gradually narrows, the hot airflow... With a smaller cross-sectional area, the flow velocity increases according to the principle of fluid continuity and is concentrated and guided to the smaller opening at the top, i.e., the through hole 8 at the bottom of the heat-insulating inner tube 5. This makes the hot air flow more directional and concentrated into the through hole 8, which helps to accelerate the discharge of residual external gas in the heat-insulating inner tube 5, accelerate the heating rate inside the heat-insulating inner tube 5, and thus accelerate the detection efficiency. Furthermore, after the heat-insulating inner tube 5 is heated, the temperature of the discharged gas will decrease. If it stays inside the detection chamber 2, it will affect the temperature inside the detection chamber 2. By setting the inner top surface of the detection chamber 2 to be arc-shaped, the airflow discharged from the heat-insulating inner tube 5 can also be guided to accelerate its outflow speed.

[0031] As a further embodiment of the present invention, the equipment cavity 9 is cylindrical, and a partition 15 is fixed in the middle of the equipment cavity 9. The partition 15 divides the equipment cavity 9 into a guide cavity 16 and an installation cavity 17. The guide cavity 16 is located above the installation cavity 17. An installation hole 18 is provided in the middle of the top surface of the partition 15. A hemispherical guide block 19 is fixed on the inner top surface of the guide cavity 16. The hot air blower 10 is fixed on the inner wall of the installation cavity 17. The air outlet of the hot air blower 10 is fixedly connected to the installation hole 18 through a pipe. An air inlet 20 is provided in the installation cavity 17 away from the air inlet of the hot air blower 10.

[0032] Specifically, the gas discharged from the exhaust port 11 still has some heat. It is guided to the air intake of the hot air blower 10 through the pipeline. The hot air blower 10 then reuses the gas to recover waste heat, which improves the energy efficiency of the entire system and conforms to the concept of sustainable development. Furthermore, setting the air intake 20 of the mounting cavity 17 away from the air intake of the hot air blower 10 also helps the hot air blower 10 to absorb the recovered hot air first, reducing heat loss. In addition, after the airflow blown out by the hot air blower 10 enters the guide cavity 16, it can flow along the surface of the guide block 19 to the air intake groove 14. By setting the guide block 19 to guide the airflow, the airflow can be evenly distributed to the air intake groove 14.

[0033] As a further embodiment of the present invention, the through hole 8 includes an air inlet 21 and an exhaust hole 22, the number of air inlets 21 and exhaust holes 22 are the same, the exhaust hole 22 is disposed above the air inlet 21, a first adjustment groove 23 and a second adjustment groove 24 are provided on the outer wall of the heat insulation sleeve 7, and the driving component is also used to drive the heat insulation sleeve 7 to rotate in the opposite direction, so that the first adjustment groove 23 is connected to the exhaust hole 22 of the heat insulation inner tube 5, and the second adjustment groove 24 is connected to the air inlet 21 of the heat insulation inner tube 5.

[0034] Specifically, in the initial stage of testing, the number of air inlets 21 and exhaust outlets 22 is the same to ensure that the airflow can quickly expel the residual material and external gas inside the heat insulation sleeve 7, thereby accelerating the internal heating rate. In the middle or later stage of testing, the heat insulation sleeve 7 is driven to rotate in the opposite direction by the drive component, so that the first adjustment groove 23 moves towards the exhaust outlet 22 of the heat insulation inner tube 5, and the second adjustment groove 24 moves towards the air inlet 21 of the heat insulation inner tube 5, until they are connected. Since the size of the first adjustment groove 23 is small, it will block most of the exhaust outlets 22, so that the number of exhaust outlets 22 is less than the number of air inlets 21, which slows down the exhaust speed of the hot airflow. This helps to increase the residence time of the gas inside the heat insulation inner tube 5, which helps the temperature measuring fiber to fully sense the temperature of the hot airflow, improves the accuracy and stability of the measurement, and reduces the possibility of misjudgment.

[0035] As a further embodiment of the present invention, the inner heat-insulating tube 5 is provided with a plurality of flexible baffles 25. The flexible baffles 25 are positioned above the corresponding air inlets 21. The side of the flexible baffle 25 near the air inlet 21 is provided with a recessed guide surface 26. A bracket 45 is fixed inside the air inlet 21. A connector is provided between the bracket 45 and the flexible baffle 25. The connector is used to rotatably connect the flexible baffle 25 to the bracket 45.

[0036] Specifically, under the guidance of the guide block 12, the airflow will concentrate and flow into the heat-insulating inner tube 5. The airflow directly impacts the surface of the temperature-sensing optical fiber, which may cause uneven heating of the surface of the temperature-sensing optical fiber, thereby affecting the accuracy of temperature measurement. In order to ensure that the surface of the temperature-sensing optical fiber is heated evenly, this embodiment sets a flexible baffle 25 above the air inlet 21 to block the incoming airflow, and sets a guide surface 26 on the flexible baffle 25 to guide and disperse the airflow, thereby avoiding the airflow directly impacting the surface of the temperature-sensing optical fiber and causing uneven heating of the surface of the temperature-sensing optical fiber.

[0037] As a further embodiment of the present invention, a plurality of flexible guide strips 27 are fixed on the guide surface 26, and the guide strips 27 are in an inclined state.

[0038] Specifically, by setting guide strips 27 on the guide surface 26, when the hot airflow impacts the guide surface 26, the original direction of the airflow will be deflected along the inclined direction of the guide strips 27 after encountering them. Since the forces are mutual and the flexible baffle 25 is rotatably connected to the bracket 45 through the connector, when the guide strips 27 apply a force to the airflow to change its direction, the airflow will simultaneously apply a reaction force of equal magnitude and opposite direction to the guide strips 27, thereby driving the flexible baffle 25 to rotate. Under the action of rotation, the dispersion of the hot airflow can be further promoted, further ensuring the uniformity of the hot airflow inside the heat insulation inner tube 5, and thus ensuring the uniformity of the temperature measuring optical fiber being heated.

[0039] As a further embodiment of the present invention, an electromagnet 28 is fixed on the inner wall of the second adjusting groove 24. The connecting member includes a sleeve 29. The top of the sleeve 29 is fixed to the inner top surface of the flexible baffle 25. A support rod 30 is inserted inside the sleeve 29. The top end of the support rod 30 passes through the flexible baffle 25 and extends outward. Multiple arc-shaped rods 31 are fixed on the top side wall of the support rod 30. The ends of the arc-shaped rods 31 are hinged to the top edge of the flexible baffle 25. A rotating disk 32 is fixed at the bottom end of the support rod 30. The rotating disk 32 is rotatably connected to the bracket 45. A spring 33 is fixed between the sleeve 29 and the rotating disk 32. The spring 33 is sleeved on the outside of the support rod 30. Multiple sliding rods 34 are fixed on the outer wall of the sleeve 29. The bottom ends of the sliding rods 34 pass through the rotating disk 32 and are jointly fixed to an adsorption plate 35.

[0040] Specifically, under the elastic force of spring 33, sleeve 29 tends to move away from the rotating disk 32, thereby pushing the middle of flexible baffle 25 to deform away from the air inlet 21, forming a concave guide surface 26. When the second adjusting groove 24 rotates to communicate with the air inlet 21, the airflow velocity in the heat insulation inner tube 5 slows down due to the increased difficulty of exhaust. Flexible baffle 25 may be difficult to rotate by the blowing force of airflow, thus affecting the dispersion effect of flexible baffle 25. In order to ensure the dispersion effect of flexible baffle 25, this embodiment sets an electromagnet 28 in the second adjusting groove 24. When the second adjusting groove 24 rotates to communicate with the air inlet 21, the electromagnet 28 is activated. Magnet 28 pulls down adsorption plate 35, which is made of ferromagnetic material. Adsorption plate 35 drives slide rod 34 and sleeve 29 to move downwards. Sleeve 29 then pulls the middle part of flexible baffle 25 downwards. The outer periphery of flexible baffle 25 is restricted by multiple arc rods 31, making it difficult to move up and down. As a result, flexible baffle 25 can only deform downwards from the middle, forming a convex shape facing air inlet 21. By changing the guiding shape of guide surface 26, the obstruction effect of flexible baffle 25 on hot airflow is reduced. After the airflow velocity is reduced, flexible baffle 25 can also rotate, ensuring the dispersion effect of hot airflow and thus ensuring the temperature uniformity inside heat insulation inner tube 5 during the test.

[0041] As a further embodiment of the present invention, the sealing assembly includes a sealing airbag 36 and an air pump 37. The sealing airbag 36 is fixed on the inner wall of the heat-insulating inner tube 5. The sealing airbag 36 is annular and sleeved on the outside of the temperature measuring optical fiber. The air pump 37 is fixed on the inner wall of the heat-insulating inner tube 5. The air outlet of the air pump 37 is connected to the inside of the sealing airbag 36 through a pipe.

[0042] Specifically, when it is necessary to seal both ends of the heat insulation inner tube 5, the air pump 37 can be started to inflate the sealing air bag 36, causing the sealing air bag 36 to expand and contact the temperature measuring optical fiber, filling the gap between the temperature measuring optical fiber and the heat insulation inner tube 5, and preventing external gas from entering the interior of the heat insulation inner tube 5 from both ends.

[0043] As a further embodiment of the present invention, the air pump 37 is connected to the inside of the detection chamber 2 through a pipe. The sealing airbag 36 includes a fixing part 38 and a squeezing part 39. The fixing part 38 is made of rigid material and is fixed to the heat insulation inner tube 5. The squeezing part 39 is made of flexible material and is in contact with the temperature measuring optical fiber. A slot 40 is provided at one end of the fixing part 38 near the inside of the heat insulation inner tube 5. An adjusting valve 41 is fixed in the slot 40.

[0044] Specifically, when adjusting the position of the temperature-sensing fiber, the sealing airbag 36 is depressurized by opening the regulating valve 41, thereby detaching the sealing airbag 36 from the temperature-sensing fiber. This prevents friction between the temperature-sensing fiber and the sealing airbag 36 during movement, avoiding wear on the extrusion part 39 and affecting subsequent extrusion sealing performance. During the depressurization process, the air pump 37 draws gas from the detection chamber 2 and delivers the gas into the sealing airbag 36. Since the regulating valve 41 is open, the hot air can be discharged from the regulating valve 41 and enter the interior of the heat-insulating inner tube 5. Because the heat-insulating inner tube 5 is isolated from the detection chamber 2 at this time, the discharged hot air will be continuously discharged from both ends of the heat-insulating inner tube 5. During the air discharge process, the entry of external gas can be reduced, which helps to reduce the adverse effects of external gas on the temperature inside the heat-insulating inner tube 5.

[0045] As a further embodiment of the present invention, the drive assembly includes a first gear 42, a second gear 43 and a motor 44. The first gear 42 is sleeved and fixed on the outside of the heat insulation sleeve 7, the motor 44 is fixed on the outer wall of the housing 1, the output shaft of the motor 44 is fixed to the second gear 43, and the second gear 43 meshes with the first gear 42.

[0046] Specifically, the motor 44 drives the second gear 43 to rotate, the second gear 43 drives the first gear 42 to rotate, and the first gear 42 drives the heat insulation sleeve 7 to rotate, thereby completing the driving function.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A distributed fiber optic temperature sensor detection device, comprising a housing (1), wherein the housing (1) has a detection cavity (2) inside, and two guide ports (3) symmetrically opened inside the detection cavity (2) communicating with the outside, characterized in that, Two guide rollers (4) are fixed on the outer wall of the housing (1). A temperature measuring optical fiber is inserted between the guide rollers (4). A heat-insulating inner tube (5) is inserted into the two guide ports (3). A temperature sensing contact (6) is fixed on the inner wall of the heat-insulating inner tube (5). One end of the heat-insulating inner tube (5) is fixed to the outer wall of the housing (1). A heat-insulating sleeve (7) is rotatably connected to the outer wall of the heat-insulating inner tube (5). Through holes (8) are opened on the surfaces of the heat-insulating sleeve (7) and the heat-insulating inner tube (5). A driving assembly is provided on the outer wall of the housing (1). The driving assembly is used to drive the heat-insulating sleeve (7) to rotate in the forward direction, so that the through holes (8) on the heat-insulating sleeve (7) and the through holes (8) on the heat-insulating inner tube (5) are closed alternately. Below the detection chamber (2) is a device chamber (9), and a hot air blower (10) is fixed on the inner wall of the device chamber (9). The air outlet of the hot air blower (10) is connected to the inside of the detection chamber (2). An exhaust port (11) is opened at the top of the detection chamber (2), and the exhaust port (11) is connected to the inside of the device chamber (9) through a pipe. Both ends of the heat-insulating inner tube (5) are provided with sealing components for sealing the ports of the heat-insulating inner tube (5); The heat insulation sleeve (7) is driven to rotate in the opposite direction by the drive component, so that the through hole (8) on the heat insulation sleeve (7) and the through hole (8) on the heat insulation inner tube (5) are connected to each other, thereby making the heat insulation inner tube (5) connected to the inside of the detection chamber (2). The hot air flow inside the detection chamber (2) can enter the inside of the heat insulation inner tube (5) through the through hole (8), discharge the residual external gas inside, and heat the inside of the heat insulation inner tube (5). The through hole (8) includes an air inlet (21) and an exhaust hole (22). The number of air inlets (21) and exhaust holes (22) is the same. The exhaust hole (22) is located above the air inlet (21). A first adjustment groove (23) and a second adjustment groove (24) are provided on the outer wall of the heat insulation sleeve (7). The driving assembly is also used to drive the heat insulation sleeve (7) to rotate in the opposite direction, so that the first adjustment groove (23) is connected to the exhaust hole (22) of the heat insulation inner tube (5), and the second adjustment groove (24) is connected to the air inlet (21) of the heat insulation inner tube (5).

2. The distributed optical fiber temperature sensor detection device according to claim 1, characterized in that, The inner top surface of the detection cavity (2) is arc-shaped. A guide block (12) is fixed inside the detection cavity (2). The guide block (12) is located below the heat insulation sleeve (7). A guide groove (13) that runs vertically through the inside of the guide block (12) is provided. Multiple air inlet grooves (14) are evenly provided on the top surface of the equipment cavity (9) along the bottom edge of the guide groove (13).

3. The distributed optical fiber temperature sensor detection device according to claim 2, characterized in that, The equipment cavity (9) is cylindrical. A partition (15) is fixed in the middle of the equipment cavity (9). The partition (15) divides the equipment cavity (9) into a guide cavity (16) and an installation cavity (17). The guide cavity (16) is located above the installation cavity (17). An installation hole (18) is provided in the middle of the top surface of the partition (15). A hemispherical guide block (19) is fixed on the inner top surface of the guide cavity (16). The hot air blower (10) is fixed on the inner wall of the installation cavity (17). The air outlet of the hot air blower (10) is fixedly connected to the installation hole (18) through a pipe. An air inlet (20) is provided in the installation cavity (17) away from the air inlet of the hot air blower (10).

4. The distributed optical fiber temperature sensor detection device according to claim 1, characterized in that, The inner heat-insulating tube (5) is provided with a plurality of flexible baffles (25). The flexible baffles (25) are positioned above the corresponding air inlets (21). The flexible baffles (25) have a recessed guide surface (26) on the side near the air inlets (21). A bracket (45) is fixed inside the air inlets (21). A connector is provided between the bracket (45) and the flexible baffles (25). The connector is used to rotatably connect the flexible baffles (25) to the bracket (45).

5. A distributed optical fiber temperature sensor detection device according to claim 4, characterized in that, Multiple flexible guide strips (27) are fixed on the guide surface (26), and the guide strips (27) are in an inclined state.

6. The distributed optical fiber temperature sensor detection device according to claim 4, characterized in that, An electromagnet (28) is fixed on the inner wall of the second adjusting groove (24). The connecting member includes a sleeve (29). The top of the sleeve (29) is fixed to the inner top surface of the flexible baffle (25). A support rod (30) is inserted inside the sleeve (29). The top end of the support rod (30) passes through the flexible baffle (25) and extends outward. Multiple arc-shaped rods (31) are fixed on the top side wall of the support rod (30). The ends of the arc-shaped rods (31) are connected to the flexible baffle (25). 5) The top edge of the support rod (30) is hinged together. The bottom end of the support rod (30) is fixed with a rotating disk (32). The rotating disk (32) is rotatably connected to the bracket (45). A spring (33) is fixed between the sleeve (29) and the rotating disk (32). The spring (33) is sleeved on the outside of the support rod (30). Multiple sliding rods (34) are fixed on the outer wall of the sleeve (29). The bottom end of the sliding rod (34) passes through the rotating disk (32) and is fixed with an adsorption plate (35).

7. The distributed optical fiber temperature sensor detection device according to claim 1, characterized in that, The sealing assembly includes a sealing airbag (36) and an air pump (37). The sealing airbag (36) is fixed on the inner wall of the heat-insulating inner tube (5). The sealing airbag (36) is annular and sleeved on the outside of the temperature measuring optical fiber. The air pump (37) is fixed on the inner wall of the heat-insulating inner tube (5). The air outlet of the air pump (37) is connected to the inside of the sealing airbag (36) through a pipe.

8. The distributed optical fiber temperature sensor detection device according to claim 7, characterized in that, The air pump (37) has its suction end connected to the inside of the detection chamber (2) through a pipe. The sealing airbag (36) includes a fixing part (38) and a squeezing part (39). The fixing part (38) is made of rigid material and is fixed to the heat insulation inner tube (5). The squeezing part (39) is made of flexible material and is in contact with the temperature measuring optical fiber. A slot (40) is provided at one end of the fixing part (38) near the inside of the heat insulation inner tube (5). A regulating valve (41) is fixed in the slot (40).

9. The distributed optical fiber temperature sensor detection device according to claim 1, characterized in that, The drive assembly includes a first gear (42), a second gear (43), and a motor (44). The first gear (42) is sleeved and fixed on the outside of the heat insulation sleeve (7). The motor (44) is fixed on the outer wall of the housing (1). The output shaft of the motor (44) is fixed to the second gear (43). The second gear (43) meshes with the first gear (42).

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