Optical fiber temperature measuring probe for burner nozzle temperature measurement

Abstract

An optical fiber type temperature measuring probe for burner nozzle temperature measurement belongs to temperature measuring technical field, the utility model discloses in order to solve the problem that the existing optical fiber probe cable is easy to be broken or scratched. Including protection assembly, protection assembly includes protection cylinder, flange cover and cable joint, the front end of protection cylinder is equipped with the installation ring seat, photoelectric sensing processor is arranged in the protection cylinder, the side of protection cylinder is equipped with cable connector pipe, and the joint seat is connected with cable connector pipe, and the first internal thread hole for screwing cable joint is equipped on joint seat, the cable of photoelectric sensing processor passes through cable connector pipe and is fixed with joint seat through cable joint, and the rear end of flange cover is connected with installation ring seat, dust -free shell is connected with the front end of inner hose assembly through inner hose assembly, high temperature sensing lens is arranged in dust -free shell, and high temperature sensing lens is connected with photoelectric sensing processor through optical fiber bundle. The utility model discloses can protect the cable of photoelectric sensing processor and not be scratched broken.

Description

Technical Field

[0001] This utility model belongs to the field of temperature measurement technology, and in particular relates to an optical fiber temperature probe for measuring the temperature of a burner nozzle. Background Technology

[0002] A burner is a general term for a device that mixes and burns fuel and air in a specific manner. In the power generation field, burners are an indispensable and crucial piece of equipment in thermal power plants. Burner nozzle temperature, as an important indicator parameter for thermal power generation, also needs to be constantly monitored.

[0003] The ambient temperature at the burner nozzle is relatively high. Currently, the temperature of the burner nozzle is usually measured by non-contact temperature probes. For example, the utility model patent with announcement number CN201166586Y discloses an optical probe for a fiber optic infrared thermometer. However, the fiber optic probe is fixedly installed by a mounting bracket, and the cable of the fiber optic probe is directly exposed. The probe is easily damaged by bumps, and the cable is easily broken or scratched. Utility Model Content

[0004] The purpose of this invention is to provide a fiber optic temperature probe for measuring burner nozzle temperature, thereby solving the problems of existing fiber optic probes being easily damaged by impacts, and cables being easily broken or scratched. The technical solution adopted by this invention is as follows:

[0005] A fiber optic temperature probe for measuring the temperature of a burner nozzle includes a fiber optic assembly, an air supply assembly, an external hose assembly, and a protective assembly. The air supply assembly includes a connecting pipe with an air nozzle on one side. The rear end of the external hose assembly is connected to the front end of the connecting pipe.

[0006] The protective assembly includes a casing, a flange, and a cable connector. The front end of the casing is provided with a mounting ring seat, and the rear end of the casing is provided with a rear cover. The photoelectric sensor processor is installed inside the casing and is fixed to the mounting ring seat with a first locking nut. A cable connector is provided on one side of the casing, and a connector seat is connected to the cable connector. The connector seat has a first internal thread hole for screwing the cable connector. The cable of the photoelectric sensor processor passes through the cable connector and is fixed to the connector seat through the cable connector. The rear end of the flange is connected to the mounting ring seat.

[0007] The fiber optic assembly includes a high-temperature sensing lens, an inner flexible tube assembly, and a fiber optic bundle. The high-temperature sensing lens is housed inside a cleanroom enclosure, which is housed inside an outer flexible tube assembly. The front end of the inner flexible tube assembly is connected to the cleanroom enclosure, and the rear end of the inner flexible tube assembly passes through the outer flexible tube assembly and the air supply assembly in sequence, and is connected to the front end of the flange sleeve. The front end of the fiber optic bundle is connected to the high-temperature sensing lens, and the rear end of the fiber optic bundle passes through the inner flexible tube assembly and is connected to the photoelectric sensor processor.

[0008] Furthermore, the dust-free housing includes a lens barrel, a dustproof lens, and a clamping ring. The front end of the lens barrel is provided with a stepped recess. The clamping ring is threadedly connected to the stepped recess and presses the dustproof lens onto the bottom surface of the stepped recess. The two end faces of the dustproof lens are sealed and abutted against the bottom surfaces of the clamping ring and the stepped recess respectively through sealing rings. The connecting nut of the union joint connects and seals the rear end of the lens barrel.

[0009] Furthermore, the connecting nut is provided with a set screw hole, and the anti-reverse set screw is threadedly connected to the set screw hole. After the connecting nut is tightened with the lens tube, the lens tube is tightened by the anti-reverse set screw.

[0010] Furthermore, the inner hose assembly includes a small-diameter metal braided hose and an inner tube connector. The rear end of the small-diameter metal braided hose is connected to the front end of the inner tube connector. The front end of the small-diameter metal braided hose is connected to the inner sleeve of the union joint. The rear end of the inner tube connector is provided with an external thread structure. The front end of the flange sleeve is provided with a second internal thread hole. The inner optical cable connector is connected to the second internal thread hole through the external thread structure and is locked by a second locking nut.

[0011] Furthermore, the inner wall of the lens barrel is provided with an internal thread structure, and the high-temperature sensing lens is screwed and fixed inside the lens barrel through the internal thread structure.

[0012] Furthermore, the outer hose assembly includes a stop ring, a first outer tube section, a large-diameter metal braided hose, a second outer tube section, and several support claws. The first outer tube section, the large-diameter metal braided hose, and the second outer tube section are connected sequentially from front to back. The stop ring is located at the front end of the inner hole of the first outer tube section. A wear-resistant spring is sleeved on the outer periphery of the large-diameter metal braided hose, and the coils of the wear-resistant spring are sequentially joined together. Several support claws are arranged circumferentially on the inner wall of the first outer tube section. A limiting flange is provided on the outer periphery of the lens tube. The outer periphery of the lens tube respectively cooperates with the inner side of several support claws for limiting, and the several support claws respectively cooperate with the limiting flange front and rear for limiting.

[0013] Furthermore, the front end of the connecting pipe is provided with a third internal threaded hole, and the rear end of the second outer pipe section is provided with an external threaded structure. The second outer pipe section is connected to the second internal threaded hole through the external threaded structure and is locked by a third locking nut.

[0014] Furthermore, a seat flange is provided at the rear end of the connecting pipe, and a sealing flange is connected to the seat flange. A pipe sleeve structure is provided on the rear end face of the sealing flange. A stop screw is threaded onto the pipe sleeve structure. The inner pipe connector passes through the pipe sleeve structure, and the stop screw tightens the inner pipe connector.

[0015] Furthermore, the rear cover is provided with a stop screw hole, and the protective sleeve is provided with a stop light hole. The rear cover and the protective sleeve are sealed together, and the stop screw hole and the stop light hole are connected by screws.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model incorporates a protective component on the exterior of the photoelectric sensor processor. The output cable of the photoelectric sensor processor is fixed and protected via a cable connector, preventing damage from impacts and protecting the cable from scratches and breaks. This ensures both flexibility in circuit installation and absolute safety of critical wire and cable channels, significantly enhancing the safety of the temperature probe for power plant burners and other applications.

[0018] 2. The first outer pipe section and the large-diameter metal braided hose need to extend into the burner nozzle. The large-diameter metal braided hose is easily scratched by the sharp edges inside the furnace. A high-temperature resistant and wear-resistant spring is fitted around the outer perimeter of the large-diameter metal braided hose. Because the wear-resistant spring has good bending performance, high hardness, and good wear resistance and impact resistance, it can effectively protect the large-diameter metal braided hose, preventing it from hitting sharp edges and avoiding scratches and bumps, thereby increasing the service life of the metal hose.

[0019] 3. The protective components of the photoelectric sensor processor have an ingenious structure. The cable connector directly corresponds to the cable of the photoelectric sensor processor, and the arrangement can be completed in a very small space, which is safe, reliable and easy to operate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the protective components;

[0022] Figure 3 This is a schematic diagram showing the connection between the fiber optic assembly and the photoelectric sensor processor.

[0023] Figure 4 This is a schematic diagram of the dust-free shell structure;

[0024] Figure 5 This is a structural schematic diagram of the inner hose assembly;

[0025] Figure 6 This is a structural schematic diagram of the external flexible hose assembly;

[0026] Figure 7 yes Figure 6 Enlarged view of point B;

[0027] Figure 8 yes Figure 1 AA section view;

[0028] Figure 9 This is a structural diagram of the air supply component.

[0029] In the diagram, 1. Outer flexible hose assembly, 2. Fiber optic assembly, 3. Third locking nut, 4. Air supply assembly, 5. Sealing flange, 6. Set screw, 7. Second locking nut, 8. Photoelectric sensor processor, 9. Protective assembly, 10. First locking nut, 11. Second internal threaded hole, 12. Flange sleeve, 13. Mounting ring seat, 14. Protective sleeve, 15. Rear cover, 16. Set screw hole, 17. Cable connector, 18. First internal threaded hole, 19. Connector seat, 20. Compression ring, 21. Dustproof lens, 22. Sealing ring, 23. Lens tube, 24. Set screw hole, 25. Connecting nut, 26. Inner sleeve, 27. Small-diameter metal braided flexible hose, 28. Inner tube connector, 29. Fiber optic bundle, 30. Inner flexible hose assembly, 31. High-temperature sensor lens, 32. 33. Stop ring, 34. Support claw, 35. First outer pipe section, 36. Second outer pipe section, 37. Large diameter metal braided hose, 38. Wear-resistant spring, 39. Third internal threaded hole, 40. Air nozzle, 41. Seat flange, 42. Cable connector, 43. Connecting pipe, 44. Dust-free shell, 45. Union joint. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the present utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0031] The connections mentioned in this utility model are divided into fixed connections and detachable connections. Fixed connections, also known as non-detachable connections, include but are not limited to conventional fixed connection methods such as folded connections, riveted connections, adhesive connections, and welded connections. Detachable connections include but are not limited to conventional disassembly methods such as bolt connections, snap-fit ​​connections, pin connections, and hinge connections. When a specific connection method is not explicitly defined, it is assumed that at least one existing connection method can be found to achieve this function, and those skilled in the art can choose according to their needs. For example, a welded connection can be chosen for a fixed connection, and a bolted connection can be chosen for a detachable connection.

[0032] The present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0033] Example: Figures 1-9 As shown, a fiber optic temperature probe for measuring the temperature of a burner nozzle includes a fiber optic assembly 2, an air supply assembly 4, an external hose assembly 1, and a protective assembly 9. The air supply assembly 4 includes a connecting pipe 42, and an air supply nozzle 39 is provided on one side of the connecting pipe 42. The rear end of the external hose assembly 1 is connected to the front end of the connecting pipe 42.

[0034] The protective assembly 9 includes a protective sleeve 14, a flange sleeve 12, and a cable connector 41. The front end of the protective sleeve 14 is provided with a mounting ring seat 13, and the rear end of the protective sleeve 14 is provided with a rear cover 15. A photoelectric sensor processor 8 is disposed inside the protective sleeve 14 and fixed to the mounting ring seat 13 by a first locking nut 10. Specifically, one end of the photoelectric sensor processor 8 has an external threaded connection section, which passes through the inner hole of the mounting ring seat 13 and is threadedly connected to the first locking nut 10. When the first locking nut 10 is tightened, the first locking nut 10 and the photoelectric sensor... The processor 8 can be clamped on both sides of the mounting ring seat 13. A cable connector 17 is provided on one side of the sleeve 14. The connector seat 19 is connected to the cable connector 17. The connector seat 19 is provided with a first internal thread hole 18 for screwing the cable connector 41. When the photoelectric sensor processor 8 is fixed on the mounting ring seat 13, the position of the cable of the photoelectric sensor processor 8 is matched with that of the cable connector 17. The cable of the photoelectric sensor processor 8 passes through the cable connector 17 and is fixed to the connector seat 19 through the cable connector 41. The rear end of the flange sleeve 12 is connected to the mounting ring seat 13.

[0035] The fiber optic assembly 2 includes a high-temperature sensing lens 31, an inner flexible tube assembly 30, and a fiber bundle 29. The high-temperature sensing lens 31 is housed inside a cleanroom enclosure 43, which is housed inside an outer flexible tube assembly 1. The front end of the inner flexible tube assembly 30 is connected to the cleanroom enclosure 43, and the rear end of the inner flexible tube assembly 30 passes through the outer flexible tube assembly 1 and the air supply assembly 4 in sequence, and is connected to the front end of the flange sleeve 12. The front end of the fiber bundle 29 is connected to the high-temperature sensing lens 31, and the rear end of the fiber bundle 29 passes through the inner flexible tube assembly 30 and is connected to the photoelectric sensor processor 8.

[0036] The dust-free housing 43 includes a lens barrel 23, a dustproof lens 21, and a clamping ring 20. The front end of the lens barrel 23 is provided with a stepped recess. The clamping ring 20 is threadedly connected to the stepped recess and presses the dustproof lens 21 on the bottom surface of the stepped recess. The two end faces of the dustproof lens 21 are sealed and abutted against the clamping ring 20 and the bottom surface of the stepped recess respectively by sealing rings 22. The connecting nut 25 of the union joint 44 connects to and seals the rear end of the lens barrel 23.

[0037] The connecting nut 25 is provided with a set screw hole 24. The anti-reverse set screw is threadedly connected to the set screw hole 24. After the connecting nut 25 is tightened with the lens tube 23, the lens tube 23 is tightened by the anti-reverse set screw.

[0038] The inner hose assembly 30 includes a small-diameter metal braided hose 27 and an inner tube connector 28. The rear end of the small-diameter metal braided hose 27 is connected to the front end of the inner tube connector 28. The front end of the small-diameter metal braided hose 27 is connected to the inner sleeve 26 of the union connector 44. The rear end of the inner tube connector 28 is provided with an external thread structure. The front end of the flange sleeve 12 is provided with a second internal thread hole 11. The inner tube connector 28 is connected to the second internal thread hole 11 through the external thread structure and is locked by the second locking nut 7.

[0039] The inner wall of the lens barrel 23 is provided with an internal thread structure, and the high temperature sensing lens 31 is screwed and fixed inside the lens barrel 23 through the internal thread structure.

[0040] The outer hose assembly 1 includes a stop ring 32, a first outer tube section 34, a large-diameter metal braided hose 36, a second outer tube section 35, and several support claws 33. The first outer tube section 34, the large-diameter metal braided hose 36, and the second outer tube section 35 are connected sequentially from front to back. The stop ring 32 is located at the front end of the inner hole of the first outer tube section 34. A wear-resistant spring 37 is sleeved on the outer periphery of the large-diameter metal braided hose 36, and the coils of the wear-resistant spring 37 are sequentially joined together. Several support claws 33 are arranged circumferentially on the inner wall of the first outer tube section 34. A limiting flange is provided on the outer periphery of the lens tube 23. The outer periphery of the lens tube 23 is respectively engaged with the inner side of several support claws 33 for limiting, and the several support claws 33 are respectively engaged with the limiting flange for limiting.

[0041] The front end of the connecting pipe 42 is provided with a third internal threaded hole 38, and the rear end of the second outer pipe section 35 is provided with an external thread structure. The second outer pipe section 35 is connected to the second internal threaded hole 11 through the external thread structure and is locked by the third locking nut 3.

[0042] The rear end of the connecting pipe 42 is provided with a seat flange 40, and the sealing flange 5 is connected to the seat flange 40. The rear end face of the sealing flange 5 is provided with a pipe sleeve structure, and a stop screw 6 is threadedly connected to the pipe sleeve structure. The inner pipe connector 28 passes through the pipe sleeve structure, and the stop screw 6 tightens the inner pipe connector 28.

[0043] The rear cover 15 is provided with a stop screw hole 16, and the protective sleeve 14 is provided with a stop light hole. The rear cover 15 and the protective sleeve 14 are sealed together, and the stop screw hole 16 and the stop light hole are connected by screws.

[0044] The present invention has the following advantages:

[0045] 1. This utility model includes a protective component 9 on the outside of the photoelectric sensor processor 8. The output cable of the photoelectric sensor processor 8 is fixed and protected through a cable connector 41, which can prevent the photoelectric sensor processor 8 from being damaged by impacts and also protect the cable of the photoelectric sensor processor 8 from being scratched or broken. This ensures both flexibility in circuit installation and absolute safety of important wire and cable channels, greatly guaranteeing the safety protection of the temperature probe for power plant burners and other application sites.

[0046] 2. The first outer pipe section 34 and the large-diameter metal braided hose 36 need to extend into the burner nozzle. The large-diameter metal braided hose 36 is easily scratched by sharp edges inside the furnace. A high-temperature resistant and wear-resistant spring 37 is fitted around the outer periphery of the large-diameter metal braided hose 36. Because the wear-resistant spring 37 has good bending performance, high hardness, and good wear resistance and impact resistance, it can effectively protect the large-diameter metal braided hose 36, preventing it from hitting sharp edges and preventing scratches and bumps, thereby increasing the service life of the metal hose.

[0047] 3. The protective components of the photoelectric sensor processor have an ingenious structure. The cable connector 17 corresponds directly to the cable of the photoelectric sensor processor, and the arrangement is completed in a very small space, which is safe, reliable and easy to operate.

[0048] The above embodiments are merely illustrative examples of the present utility model and do not limit its scope of protection. Those skilled in the art can make partial changes to it, as long as they do not exceed the spirit and essence of the present utility model, they are all within the scope of protection of the present utility model.

Claims

1. A fiber optic temperature probe for measuring the temperature of a burner nozzle, characterized in that: It includes an optical fiber assembly (2), an air supply assembly (4), an external hose assembly (1) and a protective assembly (9). The air supply assembly (4) includes a connecting pipe (42), and an air supply nozzle (39) is provided on one side of the connecting pipe (42). The rear end of the external hose assembly (1) is connected to the front end of the connecting pipe (42). The protective assembly (9) includes a protective sleeve (14), a flange sleeve (12), and a cable connector (41). The front end of the protective sleeve (14) is provided with a mounting ring seat (13), and the rear end of the protective sleeve (14) is provided with a rear cover (15). The photoelectric sensor processor (8) is located inside the protective sleeve (14) and is fixed to the mounting ring seat (13) by a first locking nut (10). A cable connector (17) is provided on one side of the protective sleeve (14). A connector seat (19) is connected to the cable connector (17). The connector seat (19) is provided with a first internal thread hole (18) for screwing the cable connector (41). The cable of the photoelectric sensor processor (8) passes through the cable connector (17) and is fixed to the connector seat (19) through the cable connector (41). The rear end of the flange sleeve (12) is connected to the mounting ring seat (13). The fiber optic assembly (2) includes a high-temperature sensing lens (31), an inner flexible tube assembly (30), and a fiber bundle (29). The high-temperature sensing lens (31) is located inside a cleanroom enclosure (43), which is located inside an outer flexible tube assembly (1). The front end of the inner flexible tube assembly (30) is connected to the cleanroom enclosure (43), and the rear end of the inner flexible tube assembly (30) passes through the outer flexible tube assembly (1) and the air supply assembly (4) in sequence, and is connected to the front end of the flange sleeve (12). The front end of the fiber bundle (29) is connected to the high-temperature sensing lens (31), and the rear end of the fiber bundle (29) passes through the inner flexible tube assembly (30) and is connected to the photoelectric sensing processor (8).

2. The fiber optic temperature probe for measuring burner nozzle temperature according to claim 1, characterized in that: The dust-free housing (43) includes a lens barrel (23), a dustproof lens (21), and a clamping ring (20). The front end of the lens barrel (23) is provided with a stepped recess. The clamping ring (20) is threadedly connected to the stepped recess and presses the dustproof lens (21) on the bottom surface of the stepped recess. The two end faces of the dustproof lens (21) are sealed and abutted against the clamping ring (20) and the bottom surface of the stepped recess respectively by sealing rings (22). The connecting nut (25) of the union joint (44) connects to and seals the rear end of the lens barrel (23).

3. The fiber optic temperature probe for measuring burner nozzle temperature according to claim 2, characterized in that: The connecting nut (25) is provided with a set screw hole (24). The anti-reverse set screw is threadedly connected to the set screw hole (24). After the connecting nut (25) is tightened with the lens tube (23), the lens tube (23) is tightened by the anti-reverse set screw.

4. The fiber optic temperature probe for measuring burner nozzle temperature according to claim 2, characterized in that: The inner hose assembly (30) includes a small-diameter metal braided hose (27) and an inner tube connector (28). The rear end of the small-diameter metal braided hose (27) is connected to the front end of the inner tube connector (28). The front end of the small-diameter metal braided hose (27) is connected to the inner sleeve (26) of the union connector (44). The rear end of the inner tube connector (28) is provided with an external thread structure. The front end of the flange sleeve (12) is provided with a second internal thread hole (11). The inner optical cable connector (17) is connected to the second internal thread hole (11) through the external thread structure and is locked by the second locking nut (7).

5. The fiber optic temperature probe for measuring burner nozzle temperature according to claim 2, characterized in that: The inner wall of the lens tube (23) is provided with an internal thread structure, and the high temperature sensing lens (31) is screwed and fixed inside the lens tube (23) through the internal thread structure.

6. The fiber optic temperature probe for measuring burner nozzle temperature according to claim 4, characterized in that: The outer hose assembly (1) includes a stop ring (32), a first outer tube section (34), a large-diameter metal braided hose (36), a second outer tube section (35), and several support claws (33). The first outer tube section (34), the large-diameter metal braided hose (36), and the second outer tube section (35) are connected sequentially from front to back. The stop ring (32) is located at the front end of the inner hole of the first outer tube section (34). A wear-resistant spring (37) is sleeved on the outer periphery of the large-diameter metal braided hose (36). The coils of the wear-resistant spring (37) are sequentially joined together. Several support claws (33) are arranged on the circumference of the inner wall of the first outer tube section (34). A limiting flange is provided on the outer periphery of the lens tube (23). The outer periphery of the lens tube (23) is respectively matched with the inner side of several support claws (33) for limiting. Several support claws (33) are respectively matched with the limiting flange for limiting.

7. The fiber optic temperature probe for measuring burner nozzle temperature according to claim 6, characterized in that: The front end of the connecting pipe (42) is provided with a third internal thread hole (38), and the rear end of the second outer pipe section (35) is provided with an external thread structure. The second outer pipe section (35) is connected to the second internal thread hole (11) through the external thread structure and is locked by the third locking nut (3).

8. The fiber optic temperature probe for measuring burner nozzle temperature according to claim 7, characterized in that: The rear end of the connecting pipe (42) is provided with a seat flange (40), and the sealing flange (5) is connected to the seat flange (40). The rear end face of the sealing flange (5) is provided with a pipe sleeve structure, and a stop screw (6) is threadedly connected to the pipe sleeve structure. The inner pipe connector (28) passes through the pipe sleeve structure, and the stop screw (6) tightens the inner pipe connector (28).

9. A fiber optic temperature probe for measuring burner nozzle temperature according to any one of claims 1-8, characterized in that: The rear cover (15) is provided with a stop screw hole (16), and the protective sleeve (14) is provided with a stop light hole. The rear cover (15) and the protective sleeve (14) are sealed together, and the stop screw hole (16) and the stop light hole are connected by screws.

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