Distributed optical fiber temperature sensor detection device

Abstract

The invention relates to the technical field of temperature sensor detection, in particular to a distributed optical fiber temperature sensor detection device which comprises a shell, a detection cavity is formed in the shell, two guide openings communicated with the outside are symmetrically formed in the detection cavity, and two guide rollers are fixed to the outer wall of the shell. A temperature measuring optical fiber is inserted between the guide rollers, a heat insulation inner pipe is jointly inserted into the two guide openings, a temperature sensing contact is fixed to the inner wall of the heat insulation inner pipe, one end of the heat insulation inner pipe is fixed to the outer wall of the shell, and a heat insulation sleeve is rotationally connected to the outer wall of the heat insulation inner pipe; according to the invention, when the position of the temperature measurement optical fiber is adjusted, the temperature measurement optical fiber can be isolated, and the adverse effect of the external temperature on the internal temperature of the detection cavity is reduced.

Description

Technical Field

[0001] The present invention relates to the field of temperature sensor detection, and in particular to a distributed optical fiber temperature sensor detection device. Background Art

[0002] The temperature measuring optical fiber is the core sensing element of the optical fiber temperature sensor, which is used to sense temperature changes. It uses effects such as Raman scattering. Temperature changes will change the characteristics of the backscattered light generated in the optical fiber. Temperature information is obtained by analyzing these optical signal changes. For example, when monitoring the temperature of power cables, the temperature measuring optical fiber is laid along the cable to sense the temperature at various locations on the cable in real time.

[0003] The utility model patent with publication number CN221224038U discloses a temperature measuring optical fiber detection tool, including a heating box, which is arranged in a pair, and a plurality of heating tubes are arranged on the upper ends of the inner walls of the two heating boxes, and the two ends of the plurality of heating tubes are respectively fixedly connected to the heating box; fixed seats are symmetrically arranged in the heating box, and a locking roller is arranged between the two fixed seats, and a limiting groove is provided on the circumference of the middle position of the locking roller, and a driving motor is respectively arranged on one side of the two fixed seats.

[0004] In the prior art, during the process of testing the temperature measuring optical fiber, when the optical fiber enters or moves out of the testing device, the gas in the testing device will flow out from the entry position or the exit position. The outflow of gas causes the local temperature to drop, forming a temperature gradient in the testing device. This will cause different parts of the optical fiber to feel different temperatures, and the optical signal changes become complicated, interfering with the accurate judgment of the optical fiber performance. Especially for high-precision temperature detection requirements, the error caused by this temperature gradient may make the detection result meaningless. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a distributed optical fiber temperature sensor detection device.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: a distributed optical fiber temperature sensor detection device, including a shell, a detection cavity is provided inside the shell, two guide ports connected to the outside are symmetrically opened in the detection cavity, two guide rollers are fixed on the outer wall of the shell, a temperature measuring optical fiber is inserted between the guide rollers, a heat-insulating inner tube is inserted in the two guide ports, a temperature sensing contact is fixed on the inner wall of the heat-insulating inner tube, one end of the heat-insulating inner tube is fixed to the outer wall of the shell, an insulation sleeve is rotatably connected to the outer wall of the heat-insulating inner tube, and the heat-insulating inner tube is connected to the outer wall of the heat-insulating inner tube. Through holes are provided on the surfaces of the sleeve and the insulating inner tube, and a driving assembly is provided on the outer wall of the shell, and the driving assembly is used to drive the insulating sleeve to rotate forward so that the through holes on the insulating sleeve and the through holes on the insulating inner tube are staggered and closed. An equipment cavity is provided below the detection cavity, and a hot air blower is fixed on the inner wall of the equipment cavity. The air outlet of the hot air blower is connected with the interior of the detection cavity. An exhaust port is provided on the top of the detection cavity, and the exhaust port is connected with the interior of the equipment cavity through a pipeline. Both ends of the insulating inner tube are provided with sealing components for sealing the ports of the insulating inner 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 arranged below the thermal insulation sleeve, a guide groove running through from top to bottom is opened inside the guide block, and a plurality of air intake grooves are evenly opened 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, the partition divides the equipment cavity into a guide cavity and an installation cavity, the guide cavity is arranged above the installation cavity, a mounting hole is opened in the middle position 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, and the installation cavity is provided with an air inlet away from the air inlet position of the hot air blower.

[0009] Preferably, the through hole includes an air inlet hole and an exhaust hole, the number of the air inlet holes and the exhaust holes is the same, the exhaust hole is arranged above the air inlet hole, and a first adjustment groove and a second adjustment groove are opened on the outer wall of the insulation sleeve, and the driving assembly is also used to drive the insulation sleeve to rotate in the opposite direction, so that the first adjustment groove is connected with the exhaust hole of the insulation inner tube, and the second adjustment groove is connected with the air inlet hole of the insulation inner tube.

[0010] Preferably, a plurality of flexible baffles are provided inside the heat-insulating inner tube, and the flexible baffles are arranged above the corresponding air inlet holes. A concave guide surface is provided on the side of the flexible baffle close to the air inlet hole. A bracket is fixed inside the air inlet hole, and a connecting piece is provided between the bracket and the flexible baffle, and the connecting piece 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, and the connecting piece includes a sleeve, the top of the sleeve is fixed to the inner top surface of the flexible baffle, a support rod is inserted into the inside of the sleeve, the top end of the support rod passes through the flexible baffle and extends out, a plurality of arc rods are fixed on the top side wall of the support rod, the ends of the arc rods are hinged to the edge of the top surface of the flexible baffle, a rotating disk is fixed to 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, the spring is sleeved on the outside of the support rod, and a plurality of 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 jointly fixed with 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 insulating inner tube, the sealing airbag is ring-shaped and is sleeved on the outside of the temperature measuring optical fiber, the air pump is fixed on the inner wall of the insulating inner tube, and the air outlet end of the air pump is connected to the inside of the sealing airbag through a pipe.

[0014] Preferably, the suction end of the air pump is connected to the inside of the detection cavity through a pipe, and the sealed airbag includes a fixed part and an extrusion part, the fixed part is made of a hard material, and the fixed part is fixed to the heat-insulating inner tube, the extrusion part is made of a flexible material, and the extrusion part is in contact with the temperature measuring optical fiber, and a slot is provided at one end of the fixed part close to the inner side of the heat-insulating inner tube, and a regulating valve is fixed in the slot.

[0015] Preferably, the driving assembly includes a first gear, a second gear and a motor, the first gear is sleeved and fixed on the outside of the insulation sleeve, the motor is fixed on the outer wall of the shell, the output shaft of the motor is fixed to the second gear, and the second gear is meshed with the first gear.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. When adjusting the position of the temperature measuring optical fiber, the temperature measuring optical fiber can be isolated to reduce the adverse effect of the external temperature on the temperature inside the detection cavity. In addition, the heat-insulating sleeve and the heat-insulating inner tube are both 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. Therefore, even if the residual gas enters the detection cavity, the impact on the temperature inside the detection cavity is small.

[0017] Second, a flexible baffle is provided above the air inlet to block the incoming airflow, and a guiding surface is provided on the flexible baffle to guide and disperse the airflow, thereby preventing the airflow from directly impacting the surface of the temperature measuring optical fiber, resulting in uneven heating of the surface of the temperature measuring optical fiber. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

[0023] Figure 6 The cross-sectional structure of the heat-insulating inner tube and the heat-insulating sleeve of the present invention is shown in FIG. Figure 1 .

[0024] Figure 7 The cross-sectional structure of the heat-insulating inner tube and the heat-insulating sleeve of the present invention is shown in FIG. Figure 2 .

[0025] In the figure: 1, shell; 2, detection cavity; 3, guide port; 4, guide roller; 5, heat-insulating inner tube; 6, temperature sensing contact; 7, heat-insulating sleeve; 8, through hole; 9, equipment cavity; 10, hot air blower; 11, exhaust port; 12, guide block; 13, guide slot; 14, air intake slot; 15, partition; 16, guide cavity; 17, installation cavity; 18, installation hole; 19, guide block; 20, air intake; 21, air intake hole; 22, exhaust hole; 23, first Adjusting slot; 24, second adjusting slot; 25, flexible baffle; 26, guide surface; 27, guide strip; 28, electromagnet; 29, sleeve; 30, support rod; 31, arc rod; 32, rotating disk; 33, spring; 34, slide rod; 35, adsorption plate; 36, sealing airbag; 37, air pump; 38, fixing part; 39, extrusion part; 40, slot hole; 41, regulating valve; 42, first gear; 43, second gear; 44, motor; 45, bracket. DETAILED DESCRIPTION

[0026] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0027] like Figures 1 to 7 A distributed optical fiber temperature sensor detection device shown in the figure comprises a shell 1, a detection cavity 2 is provided inside the shell 1, two guide ports 3 communicating with the outside are symmetrically opened in the detection cavity 2, two guide rollers 4 are fixed on the outer wall of the shell 1, a temperature measuring optical fiber is inserted between the guide rollers 4, a heat-insulating inner tube 5 is inserted in 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 shell 1, a heat-insulating sleeve 7 is rotatably connected to the outer wall of the heat-insulating inner tube 5, and the surfaces of the heat-insulating sleeve 7 and the heat-insulating inner tube 5 are both opened. A through hole 8 is provided, and a driving component is provided on the outer wall of the shell 1. The driving component is used to drive the insulation sleeve 7 to rotate forward, so that the through hole 8 on the insulation sleeve 7 and the through hole 8 on the insulation inner tube 5 are staggered and closed. An equipment cavity 9 is provided below the detection cavity 2, and a hot air blower 10 is fixed on the inner wall of the equipment cavity 9. The air outlet end of the hot air blower 10 is connected with the inside of the detection cavity 2. An exhaust port 11 is provided on the top of the detection cavity 2. The exhaust port 11 is connected with the inside of the equipment cavity 9 through a pipeline. Both ends of the insulation inner tube 5 are provided with sealing components for sealing the ports of the insulation inner tube 5.

[0028] Specifically, the temperature measuring optical fiber is connected to the external temperature measuring device, and then the temperature measuring optical fiber is inserted from one end of the guide port 3, the temperature measuring optical fiber enters the detection cavity 2, and passes through the heat-insulating inner tube 5 and then is discharged from the other guide port 3. Guide rollers 4 are set at the positions of the two guide ports 3 to guide and support the temperature measuring optical fiber to prevent the temperature measuring optical fiber from bending during testing, thereby affecting the test results. During the insertion of the temperature measuring optical fiber, the through hole 8 on the heat-insulating sleeve 7 and the through hole 8 on the heat-insulating inner tube 5 are closed to each other, thereby preventing external gas from passing through the through hole 8 from the inside of the heat-insulating inner tube 5 into the detection cavity 2, resulting in heat loss in the detection cavity 2. When the position adjustment of the temperature measuring optical fiber is completed, the openings at both ends of the heat-insulating inner tube 5 are blocked by starting the blocking component, and then the heat-insulating sleeve 7 is driven to rotate in the opposite direction by the driving component, so that the through hole 8 on the heat-insulating sleeve 7 and the through hole 8 on the heat-insulating inner tube 5 are connected to each other, so that the heat-insulating inner tube 5 is connected to the inside of the detection cavity 2, and the hot air flow in the detection cavity 2 can enter the heat-insulating inner tube 5 through the through hole 8. 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 is the same as the second temperature value, it indicates that there is no abnormality in the position of the temperature measuring optical fiber. When the first temperature value is different from the second temperature value, it indicates that there is an abnormality in the position of the temperature measuring optical fiber. In this embodiment, when the position of the temperature measuring optical fiber is adjusted, the temperature measuring optical fiber can be isolated to reduce the adverse effect of the external temperature on the internal temperature of the detection cavity 2. The heat-insulating sleeve 7 and the heat-insulating inner tube 5 are both made of heat-insulating materials, 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, due to the small space in the heat-insulating inner tube 5, even if the residual gas enters the detection cavity 2, the effect on the internal temperature of the detection cavity 2 is small.

[0029] As a further implementation scheme of the present invention, the inner top surface of the detection chamber 2 is arc-shaped, and a guide block 12 is fixed inside the detection chamber 2. The guide block 12 is arranged below the thermal insulation sleeve 7. A guide groove 13 that passes through the guide block 12 from top to bottom is opened inside, and a plurality of air intake grooves 14 are evenly opened on the top surface of the equipment cavity 9 along the bottom edge of the guide groove 13.

[0030] Specifically, the hot air flow can enter the guide groove 13 after passing through the air intake groove 14. Since the air intake groove 14 is evenly arranged along the bottom edge of the guide groove 13, the hot air flow can flow upward along the inner wall of the guide groove 13. This layout feature allows the incoming hot air flow to be evenly dispersed around the bottom of the guide groove 13, avoiding the hot air flow from concentrating at a certain point to enter, ensuring the uniformity of the hot air flow distribution in the initial stage, and laying the foundation for the subsequent stable and orderly flow. In addition, the guide groove 13 has a structure with a large lower end and a small top end, similar to a closed channel. When the hot air flow enters from the larger opening at the lower end, as the channel gradually narrows, the hot air flow is The cross-sectional area is reduced. According to the principle of fluid continuity, the flow rate will be accelerated and concentrated to the smaller opening at the top, that is, the through hole 8 at the bottom of the thermal insulation inner tube 5, so that the hot air flow can flow into the through hole 8 in a more direction and concentrated manner, which is beneficial to accelerate the discharge of residual external gas in the thermal insulation inner tube 5, accelerate the temperature rise rate in the thermal insulation inner tube 5, and thus accelerate the detection efficiency. Furthermore, after the temperature in the thermal insulation inner tube 5 is raised, the temperature of the discharged gas will decrease. If it stays in the detection cavity 2, it will affect the temperature in the detection cavity 2. By setting the inner top surface of the detection cavity 2 to an arc shape, the airflow discharged from the thermal insulation inner tube 5 can also be guided to accelerate its outflow rate.

[0031] As a further implementation scheme 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 arranged above the installation cavity 17. A mounting hole 18 is opened in the middle position of the top surface of the partition 15, and 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, and the air outlet of the hot air blower 10 is fixedly connected to the installation hole 18 through a pipe. The installation cavity 17 is provided with an air inlet 20 away from the air inlet position of the hot air blower 10.

[0032] Specifically, the gas exhausted from the exhaust port 11 still has some heat, which is guided to the air inlet position of the hot air blower 10 through a pipe, and is reused by the hot air blower 10 to recover the waste heat, thereby improving the energy utilization efficiency of the entire system and complying with the concept of sustainable development. In addition, the air inlet 20 of the installation cavity 17 is arranged away from the air inlet position of the hot air blower 10, which is also beneficial for the hot air blower 10 to first absorb the recovered hot air flow and reduce heat loss. Furthermore, 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 inlet groove 14. By setting the guide block 19 to guide the airflow, the airflow can be evenly dispersed to the air inlet groove 14.

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

[0034] Specifically, in the initial stage of the test, the number of the air inlet holes 21 and the air outlet holes 22 are the same, ensuring that the airflow can quickly discharge the residual external gas in the insulation sleeve 7, thereby accelerating the internal heating rate. In the middle or late stage of the test, the insulation sleeve 7 is driven to rotate in the opposite direction by the driving component, so that the first adjustment groove 23 moves toward the exhaust hole 22 of the insulation inner tube 5, and the second adjustment groove 24 moves toward the air inlet hole 21 of the insulation inner tube 5 until they are connected to each other. Since the first adjustment groove 23 is relatively small in size, it will block most of the exhaust holes 22, so that the number of exhaust holes 22 is less than the number of air inlet holes 21, which slows down the discharge speed of the hot air flow, which is beneficial to increase the residence time of the gas inside the insulation inner tube 5, which is beneficial for the temperature measuring optical fiber to fully feel the temperature of the hot air flow, improve the accuracy and stability of the measurement, and reduce the possibility of misjudgment.

[0035] As a further implementation scheme of the present invention, a plurality of flexible baffles 25 are arranged inside the heat-insulating inner tube 5. The flexible baffles 25 are arranged above the corresponding air inlet holes 21. A recessed guide surface 26 is provided on the side of the flexible baffle 25 close to the air inlet hole 21. A bracket 45 is fixed inside the air inlet hole 21. A connecting piece is provided between the bracket 45 and the flexible baffle 25. The connecting piece 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 on flowing toward the inside of the heat-insulating inner tube 5, and the airflow will directly impact the surface of the temperature measuring optical fiber, which may cause uneven heating of the surface of the temperature measuring optical fiber, thereby affecting the accuracy of temperature measurement. In order to ensure that the surface of the temperature measuring optical fiber is heated evenly, this embodiment provides a flexible baffle 25 above the air inlet 21 to block the incoming airflow, and provides a guide surface 26 on the flexible baffle 25 to guide and disperse the airflow, thereby preventing the airflow from directly impacting the surface of the temperature measuring optical fiber, resulting in uneven heating of the surface of the temperature measuring 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 providing a guide bar 27 on the guide surface 26, when the hot air flow hits the guide surface 26, under the blocking effect of the guide bar 27, the original movement direction of the air flow will be deflected along the inclination direction of the guide bar 27 after encountering the guide bar 27. Since the force is mutual, and the flexible baffle 25 is rotatably connected to the bracket 45 through a connecting piece, when the guide bar 27 applies a force to the air flow to change its direction, the air flow will also apply a reaction force of equal magnitude and opposite direction to the guide bar 27, thereby driving the flexible baffle 25 to rotate. Under the action of rotation, the dispersion of the hot air flow can be further promoted, further ensuring the uniformity of the hot air flow inside the thermal insulation inner tube 5, and further ensuring the uniformity of heating of the temperature measuring optical fiber.

[0039] As a further implementation scheme of the present invention, an electromagnet 28 is fixed on the inner wall of the second adjustment groove 24, and the connecting part 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 into the inside of the sleeve 29. The top end of the support rod 30 passes through the flexible baffle 25 and extends out. A plurality of arc rods 31 are fixed on the top side wall of the support rod 30. The ends of the arc rods 31 are hinged to the edge of the top surface of the flexible baffle 25. A rotating disk 32 is fixed to 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. A plurality of 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 with an adsorption plate 35.

[0040] Specifically, under the elastic force of the spring 33, the sleeve 29 has a tendency to move away from the rotating disk 32, so that the middle part of the flexible baffle 25 is pushed by the sleeve 29 to deform toward the side away from the air inlet 21, forming a concave guide surface 26. When the second adjusting groove 24 is rotated to be connected with the air inlet 21, the exhaust difficulty increases, resulting in a slower flow rate of the airflow in the heat-insulating inner tube 5. The flexible baffle 25 may be difficult to rotate by the blowing force of the airflow, thereby affecting the dispersion effect of the flexible baffle 25. In order to ensure the dispersion effect of the flexible baffle 25, this embodiment provides an electromagnet 28 in the second adjusting groove 24. When the second adjusting groove 24 is rotated to be connected with the air inlet 21, the electromagnet 28 is started. The magnet 28 attracts the adsorption plate 35 downward, and the adsorption plate 35 is made of ferromagnetic material, so that the adsorption plate 35 drives the slide bar 34 and the sleeve 29 to move downward, thereby pulling the middle part of the flexible baffle 25 downward through the sleeve 29, and the outer periphery of the flexible baffle 25 is restricted by multiple arc rods 31, making it difficult to move up and down, so that the flexible baffle 25 can only deform downward from the middle to form a state of bulging toward the air inlet 21. By changing the guiding shape of the guide surface 26, the blocking effect of the flexible baffle 25 on the hot air flow is reduced, so that after the flow rate of the air flow is reduced, the flexible baffle 25 can also rotate to ensure the dispersion effect of the hot air flow, thereby ensuring the uniformity of the temperature in the heat-insulating inner tube 5 during the test.

[0041] As a further embodiment of the present invention, the sealing component includes a sealing airbag 36 and an air pump 37. The sealing airbag 36 is fixed on the inner wall of the insulating inner tube 5. The sealing airbag 36 is annular and is sleeved on the outside of the temperature measuring optical fiber. The air pump 37 is fixed on the inner wall of the insulating inner tube 5. The air outlet end 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 the two ends of the thermal insulation inner tube 5, the air pump 37 can be started to inflate the interior of the sealing airbag 36, so that the sealing airbag 36 expands and contacts the temperature measuring optical fiber, thereby filling the gap between the temperature measuring optical fiber and the thermal insulation inner tube 5, and preventing external gas from entering the interior of the thermal insulation inner tube 5 from the two ends of the thermal insulation inner tube 5.

[0043] As a further implementation scheme of the present invention, the suction end of the air pump 37 is connected to the interior of the detection chamber 2 through a pipeline, and the sealing airbag 36 includes a fixed part 38 and an extrusion part 39. The fixed part 38 is made of a hard material and is fixed to the heat-insulating inner tube 5. The extrusion part 39 is made of a flexible material and is in contact with the temperature measuring optical fiber. A slot 40 is provided at one end of the fixed part 38 close to the inner side of the heat-insulating inner tube 5, and a regulating valve 41 is fixed in the slot 40.

[0044] Specifically, when adjusting the position of the temperature measuring optical fiber, the sealing airbag 36 is deflated by opening the regulating valve 41, so that the sealing airbag 36 is separated from the temperature measuring optical fiber, so as to avoid friction between the temperature measuring optical fiber and the sealing airbag 36 during the movement, thereby causing wear to the extrusion part 39 and affecting the subsequent extrusion sealing performance. In the process of deflation, the gas inside the detection cavity 2 is extracted by the air pump 37, and the gas is transported to the inside of the sealing airbag 36. Since the regulating valve 41 is in an open state, the hot air flow can be discharged from the regulating valve 41 and enter the inside of the insulating inner tube 5. Since the insulating inner tube 5 and the detection cavity 2 are in an isolated state at this time, the discharged hot air flow will be directly discharged from both ends of the insulating inner tube 5. In the process of air flow discharge, the entry of external gas can be reduced, which is conducive to reducing the adverse effects of external gas on the temperature inside the insulating inner tube 5.

[0045] As a further embodiment of the present invention, the driving 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 insulation sleeve 7, the motor 44 is fixed on the outer wall of the shell 1, and the output shaft of the motor 44 is fixed to the second gear 43, and the second gear 43 is meshed with the first gear 42.

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

[0047] The above shows and describes 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, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A distributed optical fiber temperature sensor detection device, comprising a housing (1), wherein the housing (1) has a detection cavity (2) inside, wherein the detection cavity (2) has two guide ports (3) symmetrically arranged inside the detection cavity and communicating with the outside, characterized in that: Two guide rollers (4) are fixed on the outer wall of the shell (1), a temperature measuring optical fiber is inserted between the guide rollers (4), a heat-insulating inner tube (5) is inserted inside 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 shell (1), a heat-insulating sleeve (7) is rotatably connected to the outer wall of the heat-insulating inner tube (5), the surfaces of the heat-insulating sleeve (7) and the heat-insulating inner tube (5) are both provided with through holes (8), and a driving component is provided on the outer wall of the shell (1), the driving component is used to drive the heat-insulating sleeve (7) to rotate in a 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 staggered and closed; An equipment chamber (9) is provided below the detection chamber (2); a hot air blower (10) is fixed on the inner wall of the equipment chamber (9); an air outlet of the hot air blower (10) is connected to the interior of the detection chamber (2); an exhaust port (11) is provided at the top of the detection chamber (2); and the exhaust port (11) is connected to the interior of the equipment chamber (9) through a pipeline; Both ends of the thermal insulation inner tube (5) are provided with sealing components for sealing the ports of the thermal insulation inner tube (5).

2. A distributed optical fiber temperature sensor detection device according to claim 1, characterized in that: The inner top surface of the detection cavity (2) is in an arc shape. A guide block (12) is fixed inside the detection cavity (2). The guide block (12) is arranged below the heat-insulating sleeve (7). A guide groove (13) extending vertically through the guide block (12) is provided inside the guide block (12). A plurality of air intake grooves (14) are evenly provided on the top surface of the device cavity (9) along the bottom edge of the guide groove (13).

3. A distributed optical fiber temperature sensor detection device according to claim 2, characterized in that: The device cavity (9) is cylindrical, a partition (15) is fixed in the middle of the device cavity (9), the partition (15) divides the device cavity (9) into a guide cavity (16) and a mounting cavity (17), the guide cavity (16) is arranged above the mounting cavity (17), a mounting 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 mounting cavity (17), the air outlet of the hot air blower (10) is fixedly connected to the mounting hole (18) through a pipeline, and an air inlet (20) is provided in the mounting cavity (17) away from the air inlet position of the hot air blower (10).

4. A distributed optical fiber temperature sensor detection device according to claim 1, characterized in that: The through hole (8) comprises an air inlet hole (21) and an air outlet hole (22), the number of the air inlet holes (21) and the number of the air outlet holes (22) being the same, the air outlet holes (22) being arranged above the air inlet holes (21), the outer wall of the heat insulating sleeve (7) being provided with a first adjustment groove (23) and a second adjustment groove (24), the driving assembly being further used to drive the heat insulating sleeve (7) to rotate in the opposite direction, so that the first adjustment groove (23) is communicated with the air outlet hole (22) of the heat insulating inner tube (5), and the second adjustment groove (24) is communicated with the air inlet hole (21) of the heat insulating inner tube (5).

5. A distributed optical fiber temperature sensor detection device according to claim 4, characterized in that: A plurality of flexible baffles (25) are arranged inside the heat-insulating inner tube (5), and the flexible baffles (25) are arranged above the corresponding air inlet holes (21). A concave guide surface (26) is arranged on one side of the flexible baffles (25) close to the air inlet holes (21). A bracket (45) is fixed inside the air inlet holes (21), and a connecting piece is arranged between the bracket (45) and the flexible baffles (25), and the connecting piece is used to rotatably connect the flexible baffles (25) to the bracket (45).

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

7. A distributed optical fiber temperature sensor detection device according to claim 5, characterized in that: An electromagnet (28) is fixed on the inner wall of the second adjustment groove (24); the connecting member comprises 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 into the interior of the sleeve (29); the top end of the support rod (30) penetrates the flexible baffle (25) and extends out; a plurality of arc-shaped rods (31) are fixed to the side wall of the top end of the support rod (30); the ends of the arc-shaped rods (31) are fixed to the flexible baffle (25); 5), 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), a plurality of sliding rods (34) are fixed on the outer wall of the sleeve (29), and the bottom ends of the sliding rods (34) penetrate the rotating disk (32) and are jointly fixed with an adsorption plate (35).

8. A distributed optical fiber temperature sensor detection device according to claim 1, characterized in that: The plugging component comprises 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 is sleeved on the outer side of the temperature measuring optical fiber; the air pump (37) is fixed on the inner wall of the heat-insulating inner tube (5); and the air outlet end of the air pump (37) is connected to the inside of the sealing airbag (36) through a pipeline.

9. A distributed optical fiber temperature sensor detection device according to claim 8, characterized in that: The air suction end of the air pump (37) is connected to the inside of the detection chamber (2) through a pipeline. The sealed airbag (36) includes a fixed part (38) and an extrusion part (39). The fixed part (38) is made of a hard material and is fixed to the heat-insulating inner tube (5). The extrusion part (39) is made of a flexible material and is in contact with the temperature measuring optical fiber. A slot (40) is provided at one end of the fixed part (38) close to the inner side of the heat-insulating inner tube (5). A regulating valve (41) is fixed in the slot (40).

10. A distributed optical fiber temperature sensor detection device according to claim 1, characterized in that: The driving assembly comprises 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-insulating 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) is meshed with the first gear (42).

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