Boiler thermal expansion monitoring device

Abstract

The utility model provides a boiler thermal expansion monitoring device which comprises a monitoring mechanism. The monitoring mechanism comprises a protective cover, a light output window and a light input window are arranged on the face, facing the to-be-monitored object, of the protective cover, and a first collimating mirror and a second collimating mirror are arranged on the inner wall of the light output window and the inner wall of the light output window respectively. During use, the protective cover is arranged on the side face of the boiler, the light output window and the light input window are arranged on the protective cover, laser is emitted to the light output window through the laser emitting head to the outer surface of the boiler, and the laser is reflected on the outer surface of the boiler, passes through the light input window and then is emitted to the linear CCD matrix; according to an optical triangulation method, the signal processor calculates the expansion coefficient of the boiler according to different positions of reflected light received by the linear CCD matrix and transmits data to the outside in real time, and the real-time monitoring effect can be achieved.

Description

Technical Field

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

[0002] Large power plant boilers are generally designed with a fully suspended structure. This design ensures that each part of the boiler body has adequate space for thermal expansion and contraction. In order to make more accurate calculations of thermal expansion displacement, an expansion center that remains unchanged under various operating conditions is required. By setting up the boiler expansion center and guiding devices such as boiler rigid beams, it is hoped that expansion can be achieved from the expansion center in a predetermined direction.

[0003] To address the issue of thermal expansion detection in boiler pressurized components, power plants typically employ contact-type mechanical indicators. The principle is as follows: a two-dimensional scale is etched onto a metal plate to serve as the panel, and a pointer (usually a round steel bar with a sharp end) is attached to it. The panel and pointer sleeve are fixed to the expansion component and the boiler platform, respectively. The three-dimensional expansion displacement of the expansion component is determined by the relative displacement between the pointer and the sleeve, and the relative displacement between the pointer head and the panel. This allows for the detection of boiler safety based on the expansion caused by boiler wall temperature.

[0004] The above-mentioned detection device has the following defects during use: it can only obtain some intermittent expansion values ​​through manual recording, and cannot obtain real-time continuous boiler expansion information;

[0005] Because of the conflict between the time requirements for personnel movement and the time limit requirements for load changes, the manually recorded inflation values ​​are difficult to represent typical working conditions and have poor accuracy.

[0006] Therefore, this application proposes a boiler thermal expansion monitoring device to improve the convenience and accuracy of boiler expansion coefficient detection. Utility Model Content

[0007] In view of the shortcomings of the prior art mentioned above, the purpose of this utility model is to provide a boiler thermal expansion monitoring device to solve the problem of inconvenient detection of boiler expansion coefficient mentioned in the prior art.

[0008] To achieve the above and other related objectives, this utility model provides a boiler thermal expansion monitoring device, including a monitoring mechanism;

[0009] The monitoring mechanism includes a protective cover, on the side of the protective cover facing the object to be monitored, a light output window and a light input window are respectively provided, and a first collimating lens and a second collimating lens are respectively provided on the inner wall of the light output window and the light output window;

[0010] The protective cover is also equipped with a laser emitter, a linear CCD matrix, a laser generator and a signal processor. The laser emitter is used to emit laser light into the first collimating lens, and the linear CCD matrix is ​​used to receive the laser light focused by the second collimating lens.

[0011] The laser emitter is optically coupled to the laser generator, and the linear CCD matrix is ​​signal-interconnected to the signal processor.

[0012] Preferably, the protective cover is further provided with a junction box, and the laser generator and the signal processor are both connected to the junction box;

[0013] The protective cover has a wiring port on its back, which is compatible with the interface position on the wiring board.

[0014] Preferably, the light output window and the light input window are perpendicularly collinear, and the projected area of ​​the light input window is larger than the projected area of ​​the light output window;

[0015] The dimensions of the first collimating lens and the second collimating lens are adapted to the dimensions of the light output window and the light input window, respectively.

[0016] Preferably, the boiler thermal expansion monitoring device also includes a support mechanism for supporting the monitoring mechanism and improving the ease of installation of the monitoring mechanism.

[0017] Preferably, the support mechanism includes a horizontal support rod, and a fixing clamp is provided at the end of the horizontal support rod, and the fixing clamp is provided with a fixing hole;

[0018] The monitoring mechanism is horizontally mounted on top of the horizontal support rod.

[0019] Preferably, the top of the horizontal support rod is provided with a long strip-shaped support groove, and both sides of the horizontal support rod are provided with fixing grooves, which extend into the support groove.

[0020] The support groove is equipped with a connecting mechanism, and the monitoring mechanism is installed on the connecting mechanism.

[0021] Preferably, the connecting mechanism includes a support slider, the monitoring mechanism is horizontally mounted on the support slider, the inner wall of the support slider is in contact with the inner wall of the support groove, and the length of the support slider is less than the length of the support groove.

[0022] The side of the support slider is provided with a through hole at the same height as the fixing groove, and a locking member passes through the through hole. The locking member cooperates with the horizontal support rod to fix the position of the support slider.

[0023] Preferably, the outer surface of the horizontal support rod is provided with anti-slip textures at equal intervals on the side of the fixing groove, and the locking member is provided with anti-loosening textures at the contact point with the outer surface of the horizontal support rod. The anti-slip textures and anti-loosening textures work together to increase the friction of the locking member.

[0024] Preferably, the top of the support slider is provided with a damping shaft connection hole, and a damping rotating shaft is provided inside the damping shaft connection hole. The upper end of the damping rotating shaft is connected to the bottom of the protective cover.

[0025] Preferably, the protective cover is eccentrically positioned at the top of the horizontal support rod, and both the light output window and the light input window are located at one end of the protective cover extending from the side of the horizontal support rod.

[0026] As described above, the boiler thermal expansion monitoring device of this utility model has the following beneficial effects:

[0027] 1. This utility model involves setting a protective cover on the side of the boiler, with a light output window and a light input window on the cover. A laser is emitted from the laser head to the outer surface of the boiler through the light output window. After being reflected on the outer surface of the boiler, the laser passes through the light input window and is directed to a linear CCD matrix. Based on the optical triangulation method, the signal processor calculates the boiler's expansion coefficient according to the different positions of the reflected light received by the linear CCD matrix, and transmits the data outward in real time. Compared with manual monitoring, this method can achieve real-time monitoring and high accuracy of monitoring data.

[0028] 2. This utility model supports the monitoring mechanism by setting up horizontal support rods and connects it to the boiler, water-cooled wall or boiler bracket through fixing clamps, thereby achieving the effect of convenient installation of the monitoring mechanism;

[0029] Meanwhile, provided that installation is convenient, multiple monitoring devices can be installed on multiple sides of the boiler to achieve three-dimensional monitoring of the boiler, further ensuring the accuracy of data and the timeliness of safety warnings.

[0030] 3. This utility model sets a support groove on a horizontal support rod and a support slider in the support groove, so that the support slider can slide and adjust the installation position in the support groove. A damping shaft is set on the support slider to support the monitoring mechanism. During installation, the position and angle of the monitoring mechanism can be adjusted to adapt to the installation requirements of different models and positions.

[0031] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value. Attached Figure Description

[0032] Figure 1 The diagram shown is a structural schematic of this utility model.

[0033] Figure 2 The diagram shown is a side view of the structure of this utility model.

[0034] Figure 3 The diagram shown is an exploded view of the structure of this utility model.

[0035] Figure 4 This utility model is shown. Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0036] Figure 5 The diagram shown is a structural schematic of the interior of the protective cover of this utility model.

[0037] Figure 6 The diagram shown illustrates the detection principle of this utility model.

[0038] Component designation explanation:

[0039] 1. Support mechanism; 101. Horizontal support rod; 102. Fixing clamp; 103. Fixing hole; 104. Support groove; 105. Fixing groove; 106. Anti-slip texture;

[0040] 2. Connecting mechanism; 201. Support slider; 202. Through hole; 203. Damping shaft connecting hole; 204. Locking element; 2041. Anti-loosening pattern; 205. Damping shaft;

[0041] 3. Monitoring mechanism; 301. Protective cover; 302. Light output window; 3021. First collimating lens; 303. Light input window; 3031. Second collimating lens; 304. Laser head; 305. Linear CCD matrix; 306. Laser generator; 307. Signal processor; 308. Terminal block; 309. Wiring port. Detailed Implementation

[0042] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0043] Please see Figures 1 to 6It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0044] like Figure 1 , Figure 5 and Figure 6 As shown, this utility model provides a boiler thermal expansion monitoring device, including a monitoring mechanism 3, which is disposed on the side of the object to be monitored. The monitoring mechanism 3 emits a laser beam onto the outer surface of the object to be monitored and determines the distance between the object and the monitoring mechanism 3 by observing the reflection point of the laser beam, thereby monitoring the expansion distance of the object. The principle of detecting boiler safety lies in establishing a database of the relationship between the boiler expansion coefficient and boiler safety by measuring the coefficient of thermal expansion of the boiler in advance. By comparing the measured data with the database, the safety of boiler operation can be determined.

[0045] Specifically, the monitoring mechanism 3 includes a protective cover 301. The side of the protective cover 301 facing the object to be monitored has a light output window 302 and a light input window 303. Laser rays are emitted from the light output window 302 to the outer surface of the boiler, then reflected by the boiler before entering the interior of the protective cover 301 through the light input window 303. A first collimating lens 3021 and a second collimating lens 3031 are respectively installed on the inner walls of the light output window 302 and the protective cover 3031. Both the first collimating lens 3021 and the second collimating lens 3031 are used to focus the light source into parallel light. The emitted laser light, through the first collimating lens 3021, forms a relatively concentrated parallel beam that hits the outer surface of the boiler, making the position and angle of the reflected light more concentrated, facilitating its entry into the interior of the protective cover 301 through the light input window 303. The light emitted to the outer surface of the boiler has a slight tilt angle, allowing the light to form a reflection angle on the boiler's outer surface. The second collimating lens 3031 concentrates the reflected laser light onto the detection equipment, improving the accuracy of the monitoring data.

[0046] The protective cover 301 also houses a laser emitter 304, a linear CCD matrix 305, a laser generator 306, and a signal processor 307. The laser emitter 304 emits laser light into the first collimating lens 3021, and the linear CCD matrix 305 receives the focused laser light from the second collimating lens 3031. The laser emitter 304 is optically coupled to the laser generator 306, and the linear CCD matrix 305 is signal-interconnected to the signal processor 307. When the laser generator 306 is powered on, it generates a laser beam, which is transmitted through an optical fiber to the laser emitter 304 and emitted into the first collimating lens 3021. After being focused and calibrated by the first collimating lens 3021, the laser beam is directed onto the outer surface of the boiler. Upon receiving the light, the boiler reflects it back to the light input window 303. The reflected light is then focused and calibrated by the second collimating lens 3031 and projected onto the linear CCD matrix 305. The linear CCD matrix 305 transmits different position signals to the signal processor 307 based on the different positions of the projected light. The signal processor 307 calculates the distance between the sensor and the object being measured using optical triangulation, and calculates the boiler's expansion coefficient based on the initial position, thereby determining the boiler's operational safety.

[0047] This detection method enables non-contact monitoring, long measurement distance, and fast measurement speed, thus improving safety. Furthermore, lasers offer strong resistance to light and electromagnetic interference, resulting in high data accuracy.

[0048] like Figure 5 As shown, in some embodiments, the protective cover 301 of this utility model also includes a junction box 308 inside, which has a power supply interface and a data transmission interface. When the junction box 308 is connected to an external power source and data source, it can supply power to the devices inside the protective cover 301 and facilitate data exchange. The laser generator 306 and the signal processor 307 are both connected to the junction box 308, which facilitates power supply to each device. At the same time, the laser generator 306 and the signal processor 307 can be remotely controlled and exchanged data. The back of the protective cover 301 has a wiring port 309, which is adapted to the interface position on the junction box 308 to facilitate the connection of external power cables and data cables to the junction box 308. This allows the junction box 308 to be connected to a PC, enabling real-time control and observation of the detection process through the PC, and generating a curve of the boiler expansion shape.

[0049] like Figure 1 and Figure 3As shown, in some embodiments, the light output window 302 and the light input window 303 of this invention are perpendicularly collinear. The laser emitted from the light output window 302 is reflected back to the light input window 303 after being reflected by the outer surface of the boiler. Because the reflected light is affected by the expansion of the boiler, its projection angle changes. Therefore, the projected area of ​​the light input window 303 is larger than that of the light output window 302, increasing the light-receiving area of ​​the light input window 303. The dimensions of the first collimating lens 3021 and the second collimating lens 3031 are respectively adapted to the dimensions of the light output window 302 and the light input window 303, so that both the first collimating lens 3021 and the second collimating lens 3031 can completely focus and calibrate the emitted and reflected light.

[0050] like Figure 1 , Figure 2 As shown in some embodiments, the boiler thermal expansion monitoring device of this utility model further includes a support mechanism 1 for supporting the monitoring mechanism 3 and improving the ease of installation of the monitoring mechanism 3. During installation, the monitoring mechanism 3 can be fixed to the boiler outer wall, water-cooled wall pipes, boiler support frame, etc. by bolts cooperating with the support mechanism 1, thereby improving the adaptability of the installation position.

[0051] like Figure 3 As shown, in some embodiments, the support mechanism 1 of this utility model includes a horizontal support rod 101, and a fixing clamp 102 is provided at the end of the horizontal support rod 101. The fixing clamp 102 is provided with a fixing hole 103. When fixing the horizontal support rod 101, it is clamped or wrapped on the fixing surface by the fixing clamp 102, and then pressure is applied to the fixing surface by bolts passing through the fixing hole 103, thereby fixing the horizontal support rod 101. The monitoring mechanism 3 is horizontally arranged on the top of the horizontal support rod 101 and is supported and fixed.

[0052] like Figure 3 As shown, in some embodiments, the top of the horizontal support rod 101 of this utility model is provided with a long strip-shaped support groove 104, and both sides of the horizontal support rod 101 are provided with fixing grooves 105, which extend into the support groove 104. A connecting mechanism 2 is provided inside the support groove 104, and the monitoring mechanism 3 is installed on the connecting mechanism 2. When multiple monitoring mechanisms 3 need to be installed for synchronous monitoring, the distance between each monitoring mechanism 3 and the boiler may be different. When debugging the initial data, it is necessary to set it individually for each monitoring mechanism 3. At this time, by adjusting the installation of the monitoring mechanism 3 in the support groove 104, the distance between all monitoring mechanisms 3 and the boiler is made to be basically the same, thereby improving the convenience of debugging during equipment installation.

[0053] like Figure 2 and Figure 3As shown, in some embodiments, the connecting mechanism 2 of this utility model includes a support slider 201, and a monitoring mechanism 3 is horizontally mounted on the support slider 201. The inner wall of the support slider 201 is in contact with the inner wall of the support groove 104, thereby preventing the support slider 201 from shaking. Furthermore, the length of the support slider 201 is less than the length of the support groove 104, allowing the support slider 201 to slide horizontally within the support groove 104 to adjust its installation position.

[0054] The side of the support slider 201 is provided with a through hole 202 at the same height as the fixing groove 105. A locking member 204 passes through the through hole 202. The locking member 204 cooperates with the horizontal support rod 101 to fix the position of the support slider 201. The locking member 204 can be a bolt and a nut. By tightening the bolt and nut together, pressure is applied to the outer surface of the horizontal support rod 101, and the support slider 201 is positioned and fixed under the action of friction.

[0055] like Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the outer surface of the horizontal support rod 101 of this invention is provided with anti-slip textures 106 at equal intervals on the side of the fixing groove 105. Anti-loosening textures 2041 are provided at the contact point between the locking member 204 and the outer surface of the horizontal support rod 101. The anti-slip textures 106 and 2041 work together to increase the friction of the locking member 204, thereby further improving the stability of fixing the support slider 201.

[0056] like Figure 3 As shown, in some embodiments, the top of the support slider 201 of this utility model is provided with a damping shaft connecting hole 203, and a damping rotating shaft 205 is provided inside the damping shaft connecting hole 203. The upper end of the damping rotating shaft 205 is connected to the bottom of the protective cover 301. During installation, the angle of the monitoring mechanism 3 can be adjusted by rotating the damping rotating shaft 205 to adapt to more usage scenarios. The damping rotating shaft 205 is preferably equipped with a locking mechanism to prevent the damping rotating shaft 205 from rotating on its own.

[0057] like Figure 1 and Figure 2 As shown, in some embodiments, the protective cover 301 of this invention is eccentrically positioned at the top of the horizontal support rod 101, and the light output window 302 and the light input window 303 are both located at one end of the protective cover 301 extending from the side of the horizontal support rod 101. When the fixing clamp 102 is fixed to a vertical object, the laser beam can be emitted from the side of the horizontal support rod 101, reducing the possibility of the fixing surface blocking the light output window 302 and the light input window 303.

[0058] In summary, the boiler thermal expansion monitoring device of this utility model uses a protective cover 301 installed on the side of the boiler, with a light output window 302 and a light input window 303 respectively set on the protective cover 301. A laser head 304 emits a laser beam through the light output window 302 to the outer surface of the boiler. After the laser beam is reflected on the outer surface of the boiler, it passes through the light input window 303 and is then directed to the linear CCD matrix 305. Based on the optical triangulation method, the signal processor 307 calculates the boiler expansion coefficient according to the different positions of the reflected light received by the linear CCD matrix 305, and transmits the data out in real time. Compared with manual monitoring, this device can achieve real-time monitoring and high accuracy of monitoring data.

[0059] This utility model supports the monitoring mechanism 3 by setting a horizontal support rod 101 and connects it to the boiler, water-cooled wall or boiler bracket through a fixing clamp 102, thereby achieving the effect of easy installation of the monitoring mechanism 3;

[0060] Meanwhile, provided that installation is convenient, multiple monitoring devices 3 can be installed on multiple sides of the boiler to achieve three-dimensional monitoring of the boiler, further ensuring the accuracy of data and the timeliness of safety warnings.

[0061] This utility model provides a support groove 104 on a horizontal support rod 101 and a support slider 201 in the support groove 104, allowing the support slider 201 to slide and adjust its installation position within the support groove 104. A damping shaft 205 is provided on the support slider 201 to support the monitoring mechanism 3. During installation, the position and angle of the monitoring mechanism 3 can be adjusted to adapt to the installation requirements of different models and positions.

[0062] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0063] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A boiler thermal expansion monitoring apparatus, characterised in that, Including monitoring agencies (3); The monitoring mechanism (3) includes a protective cover (301). The protective cover (301) has a light output window (302) and a light input window (303) on the side facing the object to be monitored. The inner walls of the light output window (302) and the light output window (302) are respectively provided with a first collimating lens (3021) and a second collimating lens (3031). The protective cover (301) is also equipped with a laser head (304), a linear CCD matrix (305), a laser generator (306), and a signal processor (307). The laser head (304) is used to emit laser light into the first collimating lens (3021), and the linear CCD matrix (305) is used to receive the laser light focused by the second collimating lens (3031). The laser emitter (304) is optically coupled to the laser generator (306), and the linear CCD matrix (305) is signal interconnected with the signal processor (307).

2. A boiler thermal expansion monitoring apparatus according to claim 1, characterised in that: The protective cover (301) is also equipped with a junction box (308), and the laser generator (306) and the signal processor (307) are both connected to the junction box (308); The protective cover (301) has a wiring port (309) on its back, which is adapted to the interface position on the wiring board (308).

3. The boiler thermal expansion monitoring apparatus of claim 1, wherein: The light output window (302) and the light input window (303) are perpendicular and collinear, and the projected area of ​​the light input window (303) is larger than the projected area of ​​the light output window (302). The dimensions of the first collimating lens (3021) and the second collimating lens (3031) are adapted to the dimensions of the light output window (302) and the light input window (303), respectively.

4. The boiler thermal expansion monitoring apparatus of claim 1, wherein: It also includes a support structure (1) for supporting the monitoring agency (3) and improving the ease of installation of the monitoring agency (3).

5. A boiler thermal expansion monitoring apparatus according to claim 4, characterised in that: The support mechanism (1) includes a horizontal support rod (101), and a fixing clamp (102) is provided at the end of the horizontal support rod (101), and a fixing hole (103) is provided on the fixing clamp (102); The monitoring mechanism (3) is horizontally positioned on top of the horizontal support rod (101).

6. A boiler thermal expansion monitoring apparatus according to claim 5, characterised in that: The top of the horizontal support rod (101) is provided with a long strip support groove (104), and both sides of the horizontal support rod (101) are provided with fixing grooves (105), and the fixing grooves (105) penetrate into the support grooves (104). The support groove (104) is provided with a connecting mechanism (2), and the monitoring mechanism (3) is installed on the connecting mechanism (2).

7. A boiler thermal expansion monitoring apparatus according to claim 6, characterised in that: The connecting mechanism (2) includes a support slider (201), the monitoring mechanism (3) is horizontally installed on the support slider (201), the inner wall of the support slider (201) is in contact with the inner wall of the support groove (104), and the length of the support slider (201) is less than the length of the support groove (104). The side of the support slider (201) is provided with a through hole (202) at the same height as the fixing groove (105). A locking member (204) passes through the through hole (202). The locking member (204) cooperates with the horizontal support rod (101) to fix the position of the support slider (201).

8. A boiler thermal expansion monitoring apparatus according to claim 7, characterised in that: The outer surface of the horizontal support rod (101) is provided with anti-slip textures (106) at equal intervals on the side of the fixing groove (105). The locking member (204) is provided with anti-loosening textures (2041) at the contact point with the outer surface of the horizontal support rod (101). The anti-slip textures (106) and anti-loosening textures (2041) work together to increase the friction of the locking member (204).

9. A boiler thermal expansion monitoring apparatus according to claim 8, characterised in that: The top of the support slider (201) is provided with a damping shaft connection hole (203), and a damping shaft (205) is provided inside the damping shaft connection hole (203). The upper end of the damping shaft (205) is connected to the bottom of the protective cover (301).

10. A boiler thermal expansion monitoring apparatus according to any of claims 4 to 9, wherein: The protective cover (301) is eccentrically positioned at the top of the horizontal support rod (101), and the light output window (302) and the light input window (303) are both located at one end of the protective cover (301) extending out of the side of the horizontal support rod (101).

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