A boiler expansion measuring device

Abstract

The utility model relates to monitoring equipment technical field especially relates to a kind of boiler expansion measuring device to solve the problem that the real expansion of boiler cannot be measured stably and accurately in the existing technology in the expansion monitoring device of boiler. Base plate is fixedly installed on the support hanger of boiler. First direction measurement component includes multiple first measurement, and multiple first measurement is laid on base plate along first direction. Second direction measurement component includes multiple second measurement, and multiple second measurement is laid on base plate along second direction, and each first measurement and each second measurement are perpendicularly arranged on base plate. The utility model provides a kind of boiler expansion measuring device for measuring the expansion of boiler.

Description

Technical Field

[0001] This utility model relates to the field of monitoring equipment technology, and in particular to a boiler expansion measuring device. Background Technology

[0002] During boiler startup, operation, and shutdown, the boiler body and its components undergo significant thermal expansion due to uneven heating and temperature changes. If this expansion is hindered or exceeds the design range, it will lead to enormous thermal stress, potentially causing serious accidents such as equipment deformation, cracking, or even tube rupture. Therefore, real-time and accurate monitoring of the expansion of critical boiler components is a crucial aspect of ensuring safe boiler operation.

[0003] Currently, mechanical measuring devices are commonly used to monitor boiler expansion. These traditional devices typically consist of a pointer, a dial, and a simple sliding mechanism. The expansion displacement of the boiler body is directly transmitted to the pointer via a mechanical connection, and the operator obtains the expansion amount by reading the pointer's position change on the dial. However, due to the harsh environment of the boiler room, factors such as dust, moisture, and high temperatures can easily cause the sliding parts of the device to jam or corrode. Once jamming occurs, the measuring device cannot sensitively and accurately follow the expansion and contraction of the boiler, leading to distorted, delayed, or even completely ineffective measurement data. Operators cannot judge the true operating status of the boiler based on distorted data, thus failing to detect abnormalities such as obstructed expansion in a timely manner, creating serious safety hazards. Furthermore, traditional mechanical measuring devices are usually rudimentary in structure, have poor installation stability, and are prone to displacement or loosening under long-term vibration.

[0004] Therefore, how to solve the problem that existing boiler expansion monitoring devices cannot stably and accurately measure the actual expansion of boilers under harsh operating conditions is one of the important problems that urgently need to be solved in this field. Utility Model Content

[0005] In view of this, the present invention provides a boiler expansion measuring device to solve the problem that existing boiler expansion monitoring devices cannot stably and accurately measure the actual expansion of the boiler under harsh operating conditions.

[0006] According to one aspect of the present invention, a boiler expansion measuring device is provided, the boiler expansion measuring device comprising: The base plate is fixedly installed on the boiler's supports and hangers. A first direction measurement assembly, comprising a plurality of first measuring elements, wherein the plurality of first measuring elements are laid on a base plate along a first direction; The second direction measurement assembly includes a plurality of second measuring elements, which are laid on the base plate along the second direction, and each first measuring element and each second measuring element are disposed perpendicularly to each other on the base plate. The third-direction measuring component includes a support, a measuring component, and a first connecting component. One end of the support is fixedly installed on the outer wall of the boiler, and the other end of the support is fixedly connected to the first connecting component. The measuring component is slidably inserted through the first connecting component and has a scale line along the axial direction of the measuring component for measuring the expansion of the boiler in the third direction.

[0007] According to one aspect of the present invention, a boiler expansion measuring device is provided, wherein each first measuring element is laid at equal intervals along a first direction on a base plate, and each second measuring element is laid at equal intervals along a second direction on the base plate, and the plurality of first measuring elements and the plurality of second measuring elements form a measuring plane coordinate system.

[0008] According to one aspect of the present invention, a boiler expansion measuring device is provided at the end of the measuring component near the measuring plane coordinate system. The rotating component is embedded in the measuring component and cooperates with the measuring plane coordinate system to determine the expansion point of the boiler.

[0009] According to one aspect of the present invention, the diameter of the rotating part in the boiler expansion measuring device is 5mm-8mm.

[0010] According to one aspect of the present invention, the boiler expansion measuring device has a telescopic support member.

[0011] According to one aspect of the present invention, a boiler expansion measuring device includes a connecting member comprising multiple sub-rotating members, and multiple grooves are provided along the circumferential direction of the connecting member, with each sub-rotating member disposed in each groove.

[0012] According to one aspect of the present invention, the boiler expansion measuring device is further provided with an oil injection hole for adding lubricating oil, and the oil injection hole is equipped with a removable sealing plug, which is an elastic rubber sealing plug.

[0013] According to one aspect of the present invention, the boiler expansion measuring device further includes a second connector for connecting a base plate, and the base plate is provided with a mounting hole for the second connector to pass through.

[0014] According to one aspect of the present invention, the boiler expansion measuring device has a base plate coated with an anti-rust coating, which is a zinc plating layer or an epoxy resin coating.

[0015] According to one aspect of the present invention, in the boiler expansion measuring device, the fit between the measuring element and the first connecting element is a clearance fit.

[0016] The above-mentioned technical solution adopted in this embodiment of the utility model can achieve the following beneficial effects: In the above-mentioned boiler expansion measuring device, the base plate is fixedly installed on the boiler support, which can prevent loosening or displacement under high temperature vibration. Even in a long-term high temperature environment, the connection strength between the base plate and the support can remain stable, ensuring that the laying reference of the first direction measuring component and the second direction measuring component does not drift, reducing the measurement error caused by unstable reference from the source. Based on this, the first direction measuring component includes multiple first measuring components, which are laid on the base plate along the first direction. The second direction measuring component includes multiple second measuring components, which are laid on the base plate along the second direction. Both the first and second directions use multiple measuring components distributed along the direction. In a local harsh environment, single-point data may be distorted, but multi-point measurement can filter local interference through cross-verification of multiple sets of data, and more realistically reflect the overall expansion trend in that direction. On this basis, each first measuring component and each second measuring component are set perpendicularly to each other on the base plate. The design of the first and second directions being perpendicular to each other covers two independent dimensions on the horizontal plane. Under vibration conditions, the boiler may sway or twist in a non-unidirectional direction. Orthogonal measurement can distinguish between effective expansion displacement and vibration interference displacement, ensuring that the extracted amount is the true thermal expansion rather than environmental interference signal.

[0017] In addition, the third-direction measuring component includes a support, a measuring component, and a first connecting component. One end of the support is fixedly installed on the outer wall of the boiler, and the other end is fixedly connected to the first connecting component. The measuring component is slidably inserted through the first connecting component and has scale lines along its axial direction for measuring the boiler's expansion in the third direction. The third-direction measuring component can slide smoothly through the first connecting component, maintaining smooth sliding even under high temperature and vibration environments. Even if the boiler experiences frequent expansion and contraction due to temperature fluctuations, the measuring component and the connecting component will not form a rigid constraint, ensuring that the expansion action is fully transmitted to the measuring scale and avoiding underestimation of the measured value due to structural obstruction. At the same time, one end of the support is fixed to the outer wall of the boiler, ensuring that it does not loosen under high temperature deformation and vibration impact. This support design, which moves synchronously with the boiler, ensures that the first connecting component always maintains consistency with the boiler's expansion direction, avoiding measurement direction deviation caused by support displacement. Secondly, the axial scale lines of the measuring component are produced using high-temperature etching or laser marking technology, which is not easily blurred in dusty or humid environments, allowing operators to directly read the true displacement value and reducing reading errors caused by unclear scales. This effectively solves the problem that existing boiler expansion monitoring devices cannot stably and accurately measure the actual expansion of the boiler under harsh operating conditions. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a boiler expansion measuring device provided as an example of this utility model.

[0020] Figure label: 1-First direction measuring component, 101-First measuring element, 2-Second direction measuring component, 201-Second measuring element, 3-Base plate, 4-Third direction measuring component, 401-Measuring element, 402-First connecting element, 4021-Groove, 4022-Sub-rotating element, 403-Rotating element, 404-Supporting element, 5-Boiler, 6-Hanger bracket. Detailed Implementation

[0021] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0022] It should be understood that the steps described in the method embodiments of this utility model may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this utility model is not limited in this respect.

[0023] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0024] It should be noted that the terms "a" and "a plurality of" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0025] The names of the messages or information exchanged between the multiple devices in this embodiment of the invention are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0026] During boiler startup, operation, and shutdown, the boiler body and its components undergo significant thermal expansion due to uneven heating and temperature changes. If this expansion is hindered or exceeds the design range, it will lead to enormous thermal stress, potentially causing serious accidents such as equipment deformation, cracking, or even tube rupture. Therefore, real-time and accurate monitoring of the expansion of critical boiler components is a crucial aspect of ensuring safe boiler operation.

[0027] Currently, mechanical measuring devices are commonly used to monitor boiler expansion. These traditional devices typically consist of a pointer, a dial, and a simple sliding mechanism. The expansion displacement of the boiler body is directly transmitted to the pointer via a mechanical connection, and the operator obtains the expansion amount by reading the pointer's position change on the dial. However, due to the harsh environment of the boiler room, factors such as dust, moisture, and high temperatures can easily cause the sliding parts of the device to jam or corrode. Once jamming occurs, the measuring device cannot sensitively and accurately follow the expansion and contraction of the boiler, leading to distorted, delayed, or even completely ineffective measurement data. Operators cannot judge the true operating status of the boiler based on distorted data, thus failing to detect abnormalities such as obstructed expansion in a timely manner, creating serious safety hazards. Furthermore, traditional mechanical measuring devices are usually rudimentary in structure, have poor installation stability, and are prone to displacement or loosening under long-term vibration.

[0028] To address the aforementioned problems, an exemplary embodiment of this utility model provides a boiler expansion measuring device to solve the problem that existing boiler expansion monitoring devices cannot stably and accurately measure the actual expansion of the boiler under harsh operating conditions.

[0029] A boiler expansion measuring device according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0030] Figure 1 This is a schematic diagram of the boiler expansion measuring device provided as an example of the present invention. Figure 1As shown, the base plate 3 is fixedly installed on the boiler support 6. The first direction measuring assembly 1 includes a plurality of first measuring elements 101, which are laid on the base plate 3 along the first direction. The second direction measuring assembly 2 includes a plurality of second measuring elements 201, which are laid on the base plate 3 along the second direction, and each first measuring element 101 and each second measuring element 201 are arranged perpendicularly to each other on the base plate 3. The third direction measuring assembly 4 includes a support 404, a measuring element 401, and a first connecting element 402. One end of the support 404 is fixedly installed on the outer wall of the boiler 5, and the other end of the support 404 is fixedly connected to the first connecting element 402. The measuring element 401 is slidably inserted through the first connecting element 402, and a scale line is provided along the axial direction of the measuring element 401 for measuring the expansion of the boiler in the third direction.

[0031] In practical applications, such as Figure 1 As shown, the base plate 3 is fixedly installed on the boiler support 6, which can prevent loosening or displacement under high-temperature vibration. Even in long-term high-temperature environments, the connection strength between the base plate 3 and the support 6 remains stable, ensuring that the laying reference of the first direction measuring component 401 and the second direction measuring component 401 does not drift, reducing measurement errors caused by unstable references from the source. Based on this, the first direction measuring component 1 includes multiple first measuring components 101, which are laid along the first direction on the base plate 3. The second direction measuring component 2 includes multiple second measuring components 201, which are laid along the second direction on the base plate 3. Both the first and second directions use multiple measuring components 401 distributed along the direction. In harsh local environments, single-point data may be distorted, but multi-point measurements can filter local interference through cross-validation of multiple sets of data, more accurately reflecting the overall expansion trend in that direction. Based on this, each first measuring element 101 and each second measuring element 201 are arranged perpendicularly to each other on the base plate 3. The design of the first and second directions being perpendicular to each other covers two independent dimensions on the horizontal plane. Under vibration conditions, the boiler may produce swaying or torsion in a non-unidirectional direction. Orthogonal measurement can distinguish between effective expansion displacement and vibration interference displacement, ensuring that the extracted amount is the true thermal expansion rather than environmental interference signal.

[0032] In addition, the third-direction measuring component 4 includes a support 404, a measuring component 401, and a first connecting component 402. One end of the support 404 is fixedly installed on the outer wall of the boiler 5, and the other end of the support 404 is fixedly connected to the first connecting component 402. The measuring component 401 is slidably inserted through the first connecting component 402, and a scale line is provided along the axial direction of the measuring component 401 for measuring the expansion of the boiler in the third direction. The third-direction measuring component 401 can slide through the first connecting component 402 and can still maintain smooth sliding under high temperature and vibration environments. Even if the boiler frequently expands and contracts due to temperature fluctuations, the measuring component 401 and the connecting component will not form a rigid constraint, ensuring that the expansion action is fully transmitted to the measuring scale and avoiding underestimation of the measurement value due to structural obstruction. At the same time, one end of the support 404 is fixed to the outer wall of the boiler, ensuring that it does not loosen under high temperature deformation and vibration impact. This support design that moves synchronously with the boiler ensures that the first connecting component 402 is always consistent with the expansion direction of the boiler, avoiding deviation in the measurement direction caused by displacement of the support 404. Secondly, the axial scale lines of the measuring component 401 are produced using high-temperature etching or laser marking, which prevents them from becoming blurred in dusty or humid environments. Operators can directly read the true displacement value, reducing reading errors caused by unclear scales. This effectively solves the problem that existing boiler expansion monitoring devices cannot stably and accurately measure the true expansion of boilers under harsh operating conditions.

[0033] For example, such as Figure 1 As shown, each first measuring element 101 is laid at equal intervals along a first direction on the base plate 3, and each second measuring element 201 is laid at equal intervals along a second direction on the base plate 3. The multiple first measuring elements 101 and the multiple second measuring elements 201 form a measuring plane coordinate system. A rotating element 403 is also provided at the end of the measuring element 401 near the measuring plane coordinate system. The rotating element 403 is embedded within the measuring element 401, and it cooperates with the measuring plane coordinate system to determine the expansion point of the boiler.

[0034] In practical applications, such as Figure 1As shown, the base plate 3 serves as a rigid carrier, providing a stable installation foundation for the first measuring component 101 and the second measuring component 201, avoiding interference from the external environment on the reference. The first measuring component 101 is laid horizontally at fixed intervals, forming the vertical axis scale of the coordinate system. The second measuring component 201 is laid vertically with the same precision, forming the horizontal axis scale. The intersection of the two forms a grid node with clear coordinate values, providing a standardized position reference system for subsequent measurements. During boiler operation, the expansion force generated by high temperature will act on the end of the measuring component 401 in the corresponding direction. At this time, the rotating component 403 embedded in the measuring component 401, through its own rotatable characteristics, converts the linear expansion displacement of the boiler into a change in rotation angle. In addition, the rotation angle of the rotating component 403 can be directly read through the coordinate system grid. Combined with the spacing accuracy of the measuring component 401, the angle parameter is converted back into the actual expansion displacement. Based on the initial reference coordinates, the calculated displacement increment can be superimposed to determine the actual point coordinates of the boiler after expansion, realizing the quantitative positioning of the expansion position.

[0035] As can be seen from the above implementation process, equidistant grid laying ensures uniform coordinate system scale and controllable error, providing a directly readable scale for lateral and longitudinal expansion, avoiding the reference drift problem of traditional single-point measurement. Compared with single-direction measurement, orthogonal grid can simultaneously capture expansion data in both the first and second directions, fully reflecting the overall expansion trend of the boiler and providing comprehensive data support for structural safety analysis. The rotating component 403 transmits expansion force through rotation rather than rigid contact, avoiding deformation of the measuring component 401 or additional stress on the boiler caused by hard contact, thus protecting the equipment and reducing measurement errors caused by mechanical resistance. In addition, the rotating component 403 is embedded inside the measuring component 401, reducing the erosion of moving parts by the boiler operating environment such as high temperature, dust, and steam, ensuring smooth and uninterrupted rotation, and extending the service life of the equipment. Converting minute linear expansion into observable rotation angles reduces the technical difficulty of directly measuring minute displacements, making it particularly suitable for minute boiler expansion.

[0036] For example, such as Figure 1As shown, the diameter of the rotating component 403 is 5mm-8mm. With a smaller circumference, the rotating component 403 can rotate at a relatively larger angle when the boiler experiences minor expansion displacement. Furthermore, the 5mm-8mm diameter is considered a miniature component, allowing it to be easily embedded into the end of the measuring component 401. This avoids spatial interference with the boiler body, pipes, or other equipment due to the excessive size of the rotating component 403, ensuring installation feasibility under complex operating conditions. The smaller diameter rotating component 403 is also lighter, placing minimal pressure on the measuring component 401 and preventing slight deformation due to its own weight, thus ensuring the stability of the coordinate system reference. The smaller diameter rotating component 403 has a lower heat capacity, resulting in less overall deformation after heating. Furthermore, its embedding within the measuring component 401 shortens the heat conduction path, leading to a more uniform temperature distribution and reducing the risk of jamming or stuck due to localized overheating, ensuring smooth rotation even at high temperatures.

[0037] For example, such as Figure 1 As shown, the support 404 is a telescopic support. The telescopic support can adjust its length to correct the installation gap between the measuring element and the base plate 3 and the boiler body, ensuring that the coordinate system composed of multiple first measuring elements 101 and second measuring elements 201 maintains a strictly horizontal or vertical reference, avoiding initial measurement errors caused by installation deviations. During boiler operation, the base or equipment body may experience slight displacement due to vibration or temperature changes. The telescopic support 404 can absorb such displacement impacts through elastic expansion and contraction, preventing stress concentration under rigid support from causing deformation or breakage of the measuring element 401, or coordinate system reference shift, thus ensuring the structural stability of the measurement system. Furthermore, the telescopic support can be made of spring damping or elastic material, converting the high-frequency vibrations generated during boiler operation into small expansion and contraction movements of the support 404, reducing the direct impact of vibration on the measuring element 401 and rotating element 403, avoiding reading fluctuations or component loosening caused by vibration, and improving the stability of the measurement data. The support component 404 itself may change in length due to thermal expansion and contraction. The telescopic design can offset this deformation through adaptive expansion and contraction, avoiding bending or breakage of the support component 404 due to thermal stress under rigid support, and ensuring the spatial position stability of the measurement coordinate system.

[0038] For example, such as Figure 1 As shown, the connector includes multiple sub-rotating parts 4022, and multiple grooves 4021 are formed along the circumferential direction of the connector, with each sub-rotating part 4022 disposed in each groove 4021. The connector is also provided with an oil filling hole for adding lubricating oil, and the oil filling hole is equipped with a removable sealing plug, which is an elastic rubber sealing plug.

[0039] In practical applications, such as Figure 1As shown, the dimensions of the groove 4021 match those of the sub-rotating component 4022, providing both radial and axial constraints to prevent lateral sliding or axial detachment of the sub-rotating component 4022 under boiler vibration and expansion forces. This rigid positioning ensures that the sub-rotating component 4022 maintains a preset fit with the measurement plane coordinate system, avoiding measurement reference failure due to positional offset and directly guaranteeing the positioning accuracy of the expansion point. The inner wall of the groove 4021 serves as a guide surface for the rotating component 403, making the rotation trajectory of the sub-rotating component 4022 more regular and reducing angle measurement errors caused by eccentric rotation under unconstrained conditions. Especially in the high-frequency vibration environment of the boiler, the groove 4021 can buffer lateral impact forces, reduce the radial sway amplitude of the sub-rotating component 4022, and improve the stability of measurement data. In addition, during boiler operation, the contact between the sub-rotating component 4022 and the inner wall of the groove 4021 will generate friction due to high-frequency rotation. Long-term dry friction can easily lead to component wear, jamming, or even seizure. High-temperature lubricating oil can be periodically added to the oil injection hole to form an oil film between the sub-rotating part 4022 and the groove 4021, which converts sliding friction into rolling friction, significantly reduces the coefficient of friction, reduces component wear, and extends the service life of the sub-rotating part 4022 and the connecting part.

[0040] For example, such as Figure 1 As shown, the boiler expansion measuring device also includes a second connector for connecting the base plate 3, and the base plate 3 is provided with mounting holes for the second connector to pass through. The second connector can be a bolt, screw, or a special connector, which will not be described in detail here. The base plate 3 is fixed to the boiler body or a preset support structure through the mounting holes to form a rigid connection. This fixing method can prevent the base plate 3 from shifting or shaking due to vibration and expansion force impact during boiler operation, ensuring that the base plate 3, as the reference carrier of the measurement plane coordinate system, always maintains the preset position, providing a stable physical reference for the positioning of the first measuring component 101, the second measuring component 201, and the rotating component 403, reducing measurement errors caused by the offset of the base plate 3 from the source. At the same time, during boiler operation, the base plate 3 needs to bear the weight of components such as the measuring component 401 and the rotating component 403, and also bear the indirect force transmitted by the boiler expansion. The mounting holes and the second connector can evenly distribute the load to the base plate 3 and the supporting structure, avoiding excessive stress at a single point that could cause deformation or breakage of the base plate 3. Especially in high-temperature environments, this load-distribution design can improve the overall structural safety of the device and extend its service life.

[0041] For example, such as Figure 1As shown, the outer surface of the base plate 3 is coated with an anti-rust coating, which is either a galvanized layer or an epoxy resin coating. Boiler operating environments are complex, often accompanied by high temperatures, water vapor, dust, and trace amounts of corrosive gases, making the metal base plate 3 prone to oxidation and corrosion. The anti-rust coating forms a continuous physical barrier on the outer surface of the base plate 3, isolating the substrate from external corrosive media and fundamentally preventing corrosion. A layer of metallic zinc is formed on the surface of the base plate 3 through electroplating or hot-dip galvanizing. Even if the coating is partially damaged, the zinc will be preferentially corroded, thus protecting the substrate from corrosion, making it particularly suitable for humid or mildly corrosive environments. Furthermore, as a high-molecular organic coating, its dense molecular structure and strong chemical resistance effectively resist the penetration of water vapor, acid and alkali mists, and it has strong adhesion, making it difficult to peel off, suitable for high-temperature, dusty boiler environments. Severe corrosion of the base plate 3 may lead to a decrease in its strength, damage to its surface flatness, and even loosening of the fit with the measuring component 401 and connecting parts. The anti-rust coating inhibits corrosion, ensuring the structural integrity of the base plate 3 and preventing device malfunction due to corrosion.

[0042] For example, such as Figure 1 As shown, the fit between the measuring component 401 and the first connecting component 402 is a clearance fit. The clearance fit, by reserving a reasonable gap, allows the measuring component 401 to be easily installed into the connecting component without external force for forced fixation, fundamentally avoiding component deformation caused by assembly stress and ensuring that the original accuracy of the measuring component 401 is not affected. During boiler operation, the ambient temperature fluctuates significantly, and the measuring component 401 and the connecting component may have different coefficients of thermal expansion due to their different materials. If it were an interference fit, the different expansion amounts of the two components when the temperature rises might cause the clearance to disappear or even result in interference, leading to component jamming; conversely, it might loosen when the temperature drops. The clearance fit provides space to accommodate differences in thermal expansion, maintaining a certain margin of movement even under temperature fluctuations, avoiding jamming or loosening caused by thermal expansion and contraction, and ensuring the structural stability of the measuring component 401 under all operating conditions. The clearance fit eliminates forced constraints between the measuring component 401 and the connecting component, resulting in minimal frictional resistance during movement. This ensures that the measuring component 401 can follow the expansion component's movement in real time without lag, accurately transmitting displacement signals and guaranteeing the timeliness and accuracy of dynamic measurements.

[0043] The above description is merely an illustration of some embodiments of this utility model and the technical principles employed. Those skilled in the art should understand that the scope of this utility model is not limited to the specific combinations of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features of this utility model that have similar functions.

[0044] While specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A boiler expansion measuring device, characterized in that, The boiler expansion measuring device includes: A base plate, which is fixedly installed on the boiler's supports and hangers; A first direction measurement assembly, comprising a plurality of first measuring elements, wherein the plurality of first measuring elements are laid on the base plate along a first direction; The second direction measurement assembly includes a plurality of second measuring elements, which are laid on the base plate along a second direction, and each first measuring element and each second measuring element are disposed perpendicularly to each other on the base plate. The third-direction measuring component includes a support, a measuring component, and a first connecting component. One end of the support is fixedly installed on the outer wall of the boiler, and the other end of the support is fixedly connected to the first connecting component. The measuring component is slidably inserted through the first connecting component and has a scale line along the axial direction of the measuring component for measuring the expansion of the boiler in the third direction.

2. The boiler expansion measuring device according to claim 1, characterized in that, Each of the first measuring elements is laid at equal intervals along a first direction on the base plate, and each of the second measuring elements is laid at equal intervals along a second direction on the base plate, and the plurality of first measuring elements and the plurality of second measuring elements form a measuring plane coordinate system.

3. The boiler expansion measuring device according to claim 2, characterized in that, The measuring element is further provided with a rotating component at its end near the measuring plane coordinate system. The rotating component is embedded in the measuring element and cooperates with the measuring plane coordinate system to determine the expansion point of the boiler.

4. The boiler expansion measuring device according to claim 3, characterized in that, The diameter of the rotating component is 5mm-8mm.

5. The boiler expansion measuring device according to claim 1, characterized in that, The support is a retractable support.

6. The boiler expansion measuring device according to claim 1, characterized in that, The connector includes multiple sub-rotating components, and multiple grooves are formed along the circumferential direction of the connector, with each sub-rotating component disposed in each groove.

7. The boiler expansion measuring device according to claim 6, characterized in that, The connector is also provided with an oil injection hole for adding lubricating oil, and the oil injection hole is equipped with a removable sealing plug, which is an elastic rubber sealing plug.

8. The boiler expansion measuring device according to claim 1, characterized in that, The boiler expansion measuring device further includes a second connector for connecting the base plate, and the base plate is provided with a mounting hole for the second connector to pass through.

9. The boiler expansion measuring device according to claim 1, characterized in that, The outer surface of the base plate is coated with an anti-rust coating, which is either a zinc plating layer or an epoxy resin coating.

10. The boiler expansion measuring device according to claim 1, characterized in that, The fit between the measuring component and the first connecting component is a clearance fit.

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