Boiler temperature measuring optical fiber protection kit

Abstract

The utility model discloses a kind of boiler temperature measuring optical fiber protection kits, boiler temperature measuring optical fiber protection kits is located at the temperature measuring through-hole of the water cooled wall of boiler, and boiler temperature measuring optical fiber protection kits includes: inner side, inner side is located at the inner side of water cooled wall, inner side is trumpet mouth shape, inner side is by temperature measuring through-hole to the radial outer side arc extension of water cooled wall inside and to inner side, the inner diameter of inner side gradually increases in the direction of temperature measuring through-hole to water cooled wall inside;Outer side, outer side is located at the outer side of water cooled wall, outer side is trumpet mouth shape, outer side is by temperature measuring through-hole to the radial outer side arc extension of water cooled wall outside and to outer side, the inner diameter of outer side gradually increases in the direction of temperature measuring through-hole to water cooled wall outside. Boiler temperature measuring optical fiber protection kits according to the utility model embodiment has the advantages that temperature measuring optical fiber abrasion is prevented, temperature measuring optical fiber is excessively bent, temperature measuring accuracy is improved etc.

Description

Technical Field

[0001] This utility model relates to the field of temperature measurement technology for circulating fluidized bed boilers, and more specifically, to a boiler temperature measurement fiber optic protection kit. Background Technology

[0002] During the operation of a circulating fluidized bed boiler, the bed temperature directly affects combustion efficiency, complete combustion, and the generation of pollutants. Excessively high or low bed temperatures may lead to problems such as coking or corrosion. Therefore, accurate measurement of the bed temperature is crucial for the operation of the boiler.

[0003] In boiler temperature measurement, fiber optic temperature measurement is more accurate than thermocouple temperature measurement. However, the stress generated by large-curvature bending of the fiber can easily affect the accuracy of temperature measurement and even cause the fiber to fail.

[0004] In related technologies, for applications using fiber optic temperature measuring devices to measure the temperature of circulating fluidized bed boilers, temperature measuring holes need to be opened on the fins so that the optical fiber can pass through the holes. Due to the influence of the fin width and the weld between the fin and the water-cooled wall tube, the diameter of the opening is limited. The part of the optical fiber in contact with the edge of the temperature measuring hole is prone to bending deformation and wear, which can lead to inaccurate optical fiber measurement or even failure. Utility Model Content

[0005] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a boiler temperature measuring fiber optic protection kit, which has the advantages of preventing wear and tear on the temperature measuring fiber, avoiding excessive bending of the temperature measuring fiber, and improving temperature measurement accuracy.

[0006] To achieve the above objectives, an embodiment of this utility model proposes a boiler temperature measurement fiber optic protection kit. The boiler temperature measurement fiber optic protection kit includes: an inner portion located on the inner side of the water-cooled wall, the inner portion being funnel-shaped and extending radially outward from the temperature measurement through-hole towards the inner side of the water-cooled wall, with the inner diameter of the inner portion gradually increasing in the direction from the temperature measurement through-hole towards the inner side of the water-cooled wall; and an outer portion located on the outer side of the water-cooled wall, the outer portion being funnel-shaped and extending radially outward from the temperature measurement through-hole towards the outer side of the water-cooled wall, with the inner diameter of the outer portion gradually increasing in the direction from the temperature measurement through-hole towards the outer side of the water-cooled wall.

[0007] The boiler temperature measuring fiber optic protection kit according to the present invention has the advantages of preventing wear of the temperature measuring fiber, avoiding excessive bending of the temperature measuring fiber, and improving the accuracy of temperature measurement.

[0008] In addition, the boiler temperature measurement fiber optic protection kit according to the above embodiments of this utility model may also have the following additional technical features:

[0009] According to one embodiment of the present invention, the bending radius at any point on the inner circumferential surface of the boiler temperature measuring fiber optic protection kit within the radial and axial cross sections passing through the kit is greater than or equal to 30 mm.

[0010] According to one embodiment of the present invention, the roughness Ra of the inner circumferential surface of the boiler temperature measuring fiber optic protection kit is 0.1-0.2 micrometers.

[0011] According to one embodiment of the present invention, the inner part is welded to the inner side of the water-cooled wall, and the outer part is welded to the outer side of the water-cooled wall.

[0012] According to one embodiment of the present invention, the coefficient of thermal expansion of the boiler temperature measuring fiber optic protection kit is 11 × 10⁻⁶. -6 / ℃-13×10 -6 / ℃.

[0013] According to one embodiment of the present invention, the axial length of the outer side is greater than the axial length of the inner side, the axial length of the outer side is 20-60 mm, and the axial length of the inner side is 10-30 mm.

[0014] According to one embodiment of the present invention, the boiler temperature measuring fiber optic protection kit is a heat-resistant material component that can withstand temperatures greater than or equal to 1250 degrees Celsius.

[0015] According to one embodiment of the present invention, a heat-resistant and wear-resistant material layer is provided on the inner side of the water-cooled wall, and the heat-resistant and wear-resistant material layer covers the inner side and the thickness of the layer from the inner side of the water-cooled wall is greater than the axial length of the inner side by 10-15 mm.

[0016] According to one embodiment of the present invention, the water-cooled wall includes water-cooled pipes and fins, and the boiler temperature measurement fiber optic protection kit is disposed on the fins.

[0017] According to one embodiment of the present invention, the boiler temperature measurement fiber optic protection kit is a circulating fluidized bed boiler temperature measurement fiber optic protection kit.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a cross-sectional view of a boiler temperature measurement fiber optic protection kit according to an embodiment of the present utility model.

[0021] Figure 2 This is a structural schematic diagram of a boiler temperature measurement fiber optic protection kit according to an embodiment of the present utility model.

[0022] Figure 3 This is a structural schematic diagram of a boiler temperature measurement fiber optic protection kit according to an embodiment of the present utility model.

[0023] Figure reference numerals: Boiler temperature measuring fiber optic protection kit 1, inner side 10, outer side 20, temperature measuring fiber optic 2, water-cooled wall 3, water-cooled pipe 4, fin 5, heat-resistant and wear-resistant material layer 6. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The following description, with reference to the accompanying drawings, describes a boiler temperature measurement fiber optic protection kit 1 according to an embodiment of the present invention.

[0028] like Figures 1-3 As shown, the boiler temperature measuring fiber optic protection kit 1 according to an embodiment of the present invention is installed at the temperature measuring through hole of the water-cooled wall 3 of the boiler. The boiler temperature measuring fiber optic protection kit 1 includes an inner part 10 and an outer part 20.

[0029] The inner part 10 is located on the inner side of the water-cooled wall 3 (the inner and outer directions of the water-cooled wall 3 are shown by the arrows in the figure). The inner part 10 is funnel-shaped and extends in an arc shape from the temperature measuring hole to the inner side of the water-cooled wall 3 and to the radial outer side of the inner part 10. The inner diameter of the inner part 10 gradually increases in the direction from the temperature measuring hole to the water-cooled wall 3.

[0030] The outer part 20 is located on the outside of the water-cooled wall 3. The outer part 20 is funnel-shaped and extends radially outward from the temperature measuring hole to the outside of the water-cooled wall 3. The inner diameter of the outer part 20 gradually increases in the direction from the temperature measuring hole to the outside of the water-cooled wall 3.

[0031] Specifically, the temperature-measuring optical fiber 2 is adapted to pass through the outer side 20, the temperature-measuring through hole and the inner side 10 and extend into the inner side of the water-cooled wall 3 for temperature measurement.

[0032] According to the embodiment of this utility model, the boiler temperature measuring fiber protection kit 1, by setting an inner part 10 and an outer part 20, extends the inner part 10 in an arc shape from the temperature measuring through hole to the inside of the water-cooled wall 3 and radially outward from the inner part 10, and the outer part 20 extends in an arc shape from the temperature measuring through hole to the outside of the water-cooled wall 3 and radially outward from the outer part 20. Compared with the related technology where the temperature measuring fiber is directly fitted into the temperature measuring through hole, the boiler temperature measuring fiber protection kit 1 can protect the temperature measuring fiber 2. On the one hand, the inner part 10 and the outer part 20 can form an arc-shaped contact surface with a large area, avoiding the temperature measuring fiber 2 from being easily worn due to the small and relatively sharp contact surface between the temperature measuring fiber 2 and the temperature measuring through hole. On the other hand, the inner part 10 and the outer part 20 can limit the bending degree of the temperature measuring fiber 2, avoiding the temperature measuring fiber 2 from being bent too much and failing, and avoiding stress concentration in the temperature measuring fiber 2 that affects the accuracy of temperature measurement.

[0033] Therefore, the boiler temperature measuring fiber protection kit 1 according to the present invention has the advantages of preventing wear of the temperature measuring fiber, avoiding excessive bending of the temperature measuring fiber, and improving the accuracy of temperature measurement.

[0034] The following description, with reference to the accompanying drawings, describes a specific embodiment of the boiler temperature measurement fiber optic protection kit 1 according to the present invention.

[0035] In some specific embodiments of this utility model, such as Figures 1-3As shown, the boiler temperature measuring fiber optic protection kit 1 according to an embodiment of the present invention includes an inner part 10 and an outer part 20.

[0036] Advantageously, the bending radius at any point on the inner circumference of the boiler temperature measuring fiber optic protection kit 1 within the radial and axial cross-sections is greater than or equal to 30 mm. This ensures that the bending radius of the portion of the temperature measuring fiber 2 constrained within the boiler temperature measuring fiber optic protection kit 1 is greater than or equal to 30 mm, preventing excessive bending of the temperature measuring fiber 2 due to an excessively small bending radius. This further limits the degree of bending of the temperature measuring fiber 2, preventing it from failing due to excessive bending and improving temperature measurement accuracy.

[0037] More advantageously, the surface roughness Ra of the inner circumferential surface of the boiler temperature measuring fiber protection kit 1 is 0.1-0.2 micrometers. This further reduces wear when the temperature measuring fiber 2 rubs against the inner circumferential surface of the boiler temperature measuring fiber protection kit 1, thus further improving the protection effect on the temperature measuring fiber 2.

[0038] Specifically, such as Figure 1 and Figure 2 As shown, the inner part 10 is welded to the inner side of the water-cooled wall 3, and the outer part 20 is welded to the outer side of the water-cooled wall 3. This improves the installation strength and reliability of the boiler temperature measurement fiber optic protection kit 1. Furthermore, the separate welding of the inner part 10 and the outer part 20 facilitates the installation of the boiler temperature measurement fiber optic protection kit 1, eliminating the need for the kit to pass through the temperature measurement through-hole, and making it easier to adapt to smaller temperature measurement through-holes.

[0039] More specifically, the coefficient of thermal expansion of the boiler temperature measurement fiber optic protection kit 1 is 11 × 10⁻⁶. -6 / ℃-13×10 -6 / ℃. This prevents the difference in thermal expansion coefficients between the boiler temperature measuring fiber optic protection kit 1 and the water-cooled wall 3 from being too large, which could affect the strength and reliability of the welding.

[0040] Figures 1-3 A boiler temperature measurement fiber optic protection kit 1, according to some examples of the present invention, is shown. For example... Figures 1-3 As shown, the axial length of the outer part 20 is greater than the axial length of the inner part 10. The axial length of the outer part 20 is 20-60 mm, and the axial length of the inner part 10 is 10-30 mm. This facilitates the installation of the temperature-sensing fiber 2 and allows it to extend along the inner side of the water-cooled wall 3.

[0041] Specifically, the boiler temperature measuring fiber optic protection kit 1 is made of heat-resistant material with a temperature resistance of 1250 degrees Celsius or higher. This ensures that the boiler temperature measuring fiber optic protection kit 1 has excellent heat resistance and prevents damage from the high temperature of the boiler.

[0042] Advantageously, such as Figure 3 As shown, a heat-resistant and wear-resistant material layer 6 is provided on the inner side of the water-cooled wall 3. The heat-resistant and wear-resistant material layer 6 covers the inner part 10, and its thickness from the inner side of the water-cooled wall 3 is greater than the axial length of the inner part 10 by 10-15 mm. Specifically, the difference between the thickness of the heat-resistant and wear-resistant material layer 6 from the inner side of the water-cooled wall 3 and the axial length of the inner part 10 is shown as h in the figure; in other words, h is 10-15 mm. This can improve the heat resistance of the boiler temperature measuring fiber protection kit 1, prevent damage from the high temperature of the boiler, and further prevent wear of the temperature measuring fiber 2.

[0043] More specifically, such as Figures 1-3 As shown, the water-cooled wall 3 includes water-cooled pipes 4 and fins 5, and the boiler temperature measuring fiber optic protection kit 1 is mounted on the fins 5. This facilitates the setting of the temperature measuring through-holes and the welding connection of the boiler temperature measuring fiber optic protection kit 1.

[0044] Optionally, the boiler temperature measurement fiber optic protection kit 1 is a circulating fluidized bed boiler temperature measurement fiber optic protection kit. This can improve the accuracy and reliability of temperature measurement in circulating fluidized bed boilers, help improve combustion efficiency and completeness, reduce pollutant generation, and prevent problems such as coking and corrosion caused by inaccurate temperature measurement.

[0045] Other components and operations of the boiler temperature measurement fiber optic protection kit 1 according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A boiler temperature measurement fiber optic protection kit, characterized in that, The boiler temperature measurement fiber optic protection kit is installed at the temperature measurement through-hole of the boiler's water-cooled wall, and the boiler temperature measurement fiber optic protection kit includes: The inner side is located on the inner side of the water-cooled wall. The inner side is funnel-shaped and extends radially outward from the temperature measuring hole towards the inner side of the water-cooled wall. The inner diameter of the inner side gradually increases in the direction from the temperature measuring hole towards the inner side of the water-cooled wall. The outer portion is located on the outside of the water-cooled wall. The outer portion is funnel-shaped and extends radially outward from the temperature measuring hole to the outside of the water-cooled wall. The inner diameter of the outer portion gradually increases in the direction from the temperature measuring hole to the outside of the water-cooled wall.

2. The boiler temperature measurement fiber optic protection kit according to claim 1, characterized in that, The bending radius at any point on the inner circumferential surface of the boiler temperature measuring fiber optic protection kit within the radial and axial sections passing through the kit is greater than or equal to 30 mm.

3. The boiler temperature measurement fiber optic protection kit according to claim 1, characterized in that, The surface roughness Ra of the inner circumferential surface of the boiler temperature measuring fiber optic protection kit is 0.1-0.2 micrometers.

4. The boiler temperature measurement fiber optic protection kit according to claim 1, characterized in that, The inner part is welded to the inner side of the water-cooled wall, and the outer part is welded to the outer side of the water-cooled wall.

5. The boiler temperature measurement fiber optic protection kit according to claim 1, characterized in that, The thermal expansion coefficient of the boiler temperature measurement fiber optic protection kit is 11×10⁻⁶. -6 / ℃-13×10 -6 / ℃.

6. The boiler temperature measurement fiber optic protection kit according to claim 1, characterized in that, The axial length of the outer part is greater than the axial length of the inner part. The axial length of the outer part is 20-60 mm, and the axial length of the inner part is 10-30 mm.

7. The boiler temperature measurement fiber optic protection kit according to claim 1, characterized in that, The boiler temperature measurement fiber optic protection kit is made of heat-resistant material that can withstand temperatures of 1250 degrees Celsius or higher.

8. The boiler temperature measurement fiber optic protection kit according to claim 1, characterized in that, The inner side of the water-cooled wall is provided with a heat-resistant and wear-resistant material layer, which covers the inner side and has a thickness at a distance from the inner side of the water-cooled wall that is 10-15 mm greater than the axial length of the inner side.

9. The boiler temperature measurement fiber optic protection kit according to claim 1, characterized in that, The water-cooled wall includes water-cooled pipes and fins, and the boiler temperature measurement fiber optic protection kit is installed on the fins.

10. The boiler temperature measurement fiber optic protection kit according to claim 1, characterized in that, The boiler temperature measurement fiber optic protection kit is a circulating fluidized bed boiler temperature measurement fiber optic protection kit.

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