An online monitoring box for the fineness of pulverized coal in boilers

Abstract

This utility model relates to an online monitoring box for the fineness of pulverized coal in boilers, belonging to the field of process monitoring technology. It includes a cabinet housing, inside which a dual-redundant power supply module and a control component are connected via multiple guide rails. The control component is externally connected to a SIS system and electrically connected to the dual-redundant power supply module. The guide rails include a mounting base, with an H-shaped first guide rail slidably connected to the top of the mounting base. A second guide rail is detachably connected to the top of the first guide rail. Both the mounting base and the second guide rail have a U-shaped structure. The mounting base is detachably installed inside the cabinet housing, and straight first sliding grooves are provided on both sides of the mounting base. The first guide rail has a second sliding groove and two movable sliding rods arranged in layers. The second sliding groove has a horizontally arranged J-shaped structure. Two second sliding rods are provided inside the second guide rail, and the two second sliding rods are slidably engaged within the second sliding groove. This utility model enables rapid installation, disassembly, and maintenance, and the internal components support hot-swapping.

Description

Technical Field

[0001] This utility model relates to an online monitoring box for the fineness of pulverized coal in boilers, belonging to the field of process detection technology. Background Technology

[0002] Power plants mainly rely on the experience of operators to control the fineness of pulverized coal. The detection of pulverized coal fineness is mostly done offline. This method has a long time lag, large error, and poor working conditions. Operators cannot keep abreast of changes in pulverized coal fineness, which leads to adverse phenomena such as decreased combustion performance and water-cooled wall erosion and corrosion. This method is no longer suitable for the needs of power production under the information age.

[0003] To achieve online monitoring and optimization of pulverized coal fineness, existing monitoring methods typically include electrostatic methods, optical pulse methods, ultrasonic methods, and digital image processing. All of these methods involve installing sensors on the coal mill outlet pipe, measuring parameters such as the flow rate and concentration of the pulverized coal, and then indirectly calculating the fineness of the pulverized coal by combining this with pulverized coal sampling and analysis. The controller connects to the Safety Instrumented System (SIS) for online monitoring. The SIS is a control network used in power plants to achieve unit-level safety interlocks and advanced application management, avoiding the shortcomings of manual monitoring.

[0004] However, the existing monitoring methods involve cumbersome component installation and inconvenient maintenance. Maintenance requires shutdown, and disassembly and assembly are complex, with redundant structures. These factors significantly increase the difficulty of installation and maintenance, thus necessitating improvements. Utility Model Content

[0005] To overcome the shortcomings of existing monitoring devices, such as numerous components, complex installation, difficulty in quick disassembly and inspection, and inaccurate mechanical return, this utility model designs an online monitoring device for the fineness of boiler pulverized coal. This device requires no on-site installation and maintenance, and can achieve rapid installation, disassembly, and maintenance. Its internal components support hot-swappable extraction and ensure accurate return positioning.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A boiler pulverized coal fineness online monitoring box includes a cabinet, inside which a dual redundant power supply module and a control component are connected via guide rails. The control component is externally connected to a SIS system and is electrically connected to the dual redundant power supply module. The guide rail includes a mounting base, with an H-shaped first guide rail slidably connected to the top of the mounting base, and a second guide rail detachably connected to the top of the first guide rail; both the mounting base and the second guide rail are U-shaped and arranged opposite to each other; the mounting base can be detachably installed inside the cabinet, and straight first sliding grooves are provided on both sides of the mounting base; a second sliding groove is provided on the upper layer of the first guide rail, and a movable sliding rod is provided on the lower layer of the first guide rail; the second sliding groove is a horizontally arranged J-shaped structure, and the movable sliding rod is slidably engaged in the first sliding groove; a second sliding rod is provided at the bottom of the second guide rail, and the second sliding rod is slidably engaged in the second sliding groove; The control components and dual redundant power supply modules are respectively mounted on the top of the two second guide rails.

[0007] In a preferred embodiment of this utility model, a dual magnetic levitation return module is also provided at the corresponding positions of the top of the mounting base and the bottom of the first guide rail. The dual magnetic levitation return module includes a fixed outer frame, a permanent magnet is sleeved in the inner ring of the fixed outer frame, and a plurality of positioning pins for insertion and fixing are provided on the fixed outer frame. Positioning grooves corresponding to the positioning pins are provided on both the mounting base and the first guide rail.

[0008] In a preferred embodiment of this utility model, the cabinet includes a cabinet body, a cover hinged to the front of the cabinet body, and an industrial touch screen for displaying the fineness of coal powder fixedly connected to the top of the cabinet body. The industrial touch screen is electrically connected to the control components.

[0009] In a preferred embodiment of the present invention, the control component includes a metal chassis with a front panel on the front side. The front panel has multiple ports and status indicator lights. The ports include an external screen port, a network port, a USB external port, an external system port, and a power port. The external screen jack is electrically connected to the industrial touchscreen via a dedicated video cable for real-time display of coal powder fineness monitoring data. The network jack is electrically connected to the power plant's internal LAN interface via a network cable, enabling data communication between the control components and the SIS and DCS systems, transmitting coal powder fineness calculation results, and receiving coal mill operating parameters. The USB external jack is electrically connected to an external storage device for exporting historical monitoring data and system logs, or importing update programs for the neural network soft measurement module. The external system jack is electrically connected to the SIS system via a dedicated communication cable, transmitting key safety signals (such as power failure alarms and abnormal coal powder fineness values) to the SIS system in real-time for interlocking protection. The power jack is electrically connected to the output of a dual redundant power supply module, providing power in parallel through internal redundant modules to ensure zero-interruption operation of the control components and industrial touchscreen during main / backup power switching. The status indicator lights include a power indicator, a running status indicator, and a fault indicator. The power indicator is normally solid green; when the main power fails, it flashes red, triggers the power failure alarm relay, illuminates the fault indicator, and triggers an alarm in the SIS system. The running status indicator flashes green periodically under normal conditions; when the neural network module crashes, the running status indicator turns off, and the fault indicator remains solid red, requiring a restart of the control components. The fault indicator is normally off; when communication with the industrial touchscreen is interrupted, the running status indicator flashes abnormally red, and the fault indicator flashes red, requiring a check of the external screen connector connection.

[0010] In a preferred embodiment of this utility model, the dual-redundant power supply module includes a housing, a main power supply module, and a backup power supply module. Two vertically distributed receiving slots are provided on one side of the housing, and the main power supply module and the backup power supply module are respectively inserted into the two receiving slots. Both the main power supply module and the backup power supply module are detachably connected to the housing. The output terminals of the main power supply module and the backup power supply module are connected in parallel through an internal redundancy module. One end of both the main power supply module and the backup power supply module is provided with a push-pull handle for removal. The surface of the housing is provided with several heat dissipation holes.

[0011] In a preferred embodiment of this utility model, the dual redundant power supply module is further provided with a power failure alarm relay. One end of the power failure alarm relay is electrically connected to the internal redundant module, and the other end of the power failure alarm relay is electrically connected to the SIS system.

[0012] Compared with the prior art, this utility model has the following features and beneficial effects: 1. All components of this utility model are installed inside the cabinet and socket, eliminating the need to install any sensors or samplers in the primary air duct or coal mill outlet, thus completely eliminating the need for on-site drilling, wiring, and maintenance; the structure is compact, easy to maintain and manage, and effectively saves space.

[0013] 2. The internal components of this utility model are fixedly installed by adopting quick sliding disassembly and assembly guide rails, which enables hot-swapping, improves component replacement efficiency, and reduces downtime.

[0014] 3. This utility model directly displays the fineness of coal powder and the health index of grinding rollers through an industrial touch screen installed on the top of the cabinet, allowing operators to adjust the blending and combustion strategies locally without logging into the backend.

[0015] 4. This utility model connects to the SIS system through a dual redundant power supply module and a power failure alarm relay, which quickly sends power failure information to the DCS system, avoiding blind spots in neural network soft measurement; the redundant power supply design and power failure alarm function ensure stable system operation and improve safety.

[0016] 5. This utility model uses a dual magnetic levitation return module for low-resistance sliding. The permanent magnets with the same poles opposite each other generate a certain air gap for levitation, which reduces mechanical contact friction between the sliding groove and the sliding rod. This allows internal components to be pulled out or pushed in with a small force. The principle of repulsion between like poles also provides a damping effect when pulling out or pushing in. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram illustrating the disassembly of the industrial touchscreen of this utility model; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a utility model Figure 1 A magnified view of a portion at point A; Figure 4 This is a three-dimensional structural diagram of the dual redundant power supply module of this utility model; Figure 5 This is a schematic diagram of the three-dimensional structure of the guide rail of this utility model; Figure 6 This is a front view of the guide rail of this utility model; Figure 7 This is a schematic diagram of the structure of the dual magnetic levitation return module of this utility model.

[0018] The attached diagrams are labeled as follows: 1. Cabinet enclosure; 2. Dual redundant power supply module; 3. Control component; 4. Guide rail; 5. Dual magnetic levitation return module; 11. Cabinet; 12. Cabinet cover; 13. Industrial touch screen; 21. Outer shell; 22. Main power supply module; 23. Backup power supply module; 24. Ventilation holes; 31. Metal chassis; 32. Front panel; 33. Interface; 34. Status indicator light; 41. Mounting base; 42. First guide rail ; 43. Second guide rail; 51. Fixed outer frame; 52. Permanent magnet; 53. Positioning pin; 54. Positioning groove; 211. Receiving groove; 221. Push-pull handle; 331. External screen socket; 332. Network socket; 333. USB external socket; 334. External system socket; 335. Power socket; 411. First sliding groove; 421. Second sliding groove; 422. Movable sliding rod; 431. Second sliding rod. Detailed Implementation

[0019] The present invention will now be described in more detail with reference to the embodiments.

[0020] like Figures 1 to 2 and Figures 5 to 6 As shown, the boiler pulverized coal fineness online monitoring box of this embodiment includes a cabinet box 1. Inside the cabinet box 1, a dual redundant power supply module 2 and a control component 3 are connected via a guide rail 4. The control component 3 is externally connected to the SIS system, and the control component 3 is electrically connected to the dual redundant power supply module 2. The guide rail 4 includes a mounting base 41, with an H-shaped first guide rail 42 slidably connected to the top of the mounting base 41, and a second guide rail 43 detachably connected to the top of the first guide rail 42; both the mounting base 41 and the second guide rail 43 are U-shaped and arranged opposite to each other; the mounting base 41 is detachably installed inside the cabinet socket 1, and straight first sliding grooves 411 are provided on both sides of the mounting base 41; a second sliding groove 421 is provided on the upper layer of the first guide rail 42, and a movable sliding rod 422 is provided on the lower layer of the first guide rail 42; the second sliding groove 421 is generally arranged in a horizontal J-shaped structure, and the movable sliding rod 422 is slidably engaged in the first sliding groove 411; a second sliding rod 431 is provided at the bottom of the second guide rail 43, and the second sliding rod 431 is slidably engaged in the second sliding groove 421. The control component 3 and the dual redundant power supply module 2 are respectively mounted on the top of the two second guide rails 43.

[0021] like Figures 5 to 7 As shown, a dual magnetic levitation return module 5 is also provided at the corresponding positions of the top of the mounting base 41 and the bottom of the first guide rail 42. The dual magnetic levitation return module 5 includes a fixed outer frame 51, and a permanent magnet 52 is sleeved in the inner circle of the fixed outer frame 51. A plurality of positioning pins 53 for insertion and fixing are provided on the fixed outer frame 51. Positioning grooves 54 corresponding to the positioning pins 53 are provided on both the mounting base 41 and the first guide rail 42.

[0022] like Figures 1 to 2 As shown, the cabinet box 1 includes a box body 11, with a cover 12 hinged to the front of the box body 11. An industrial touch screen 13 for displaying the fineness of coal powder is fixedly connected to the top of the box body 11, and the industrial touch screen 13 is electrically connected to the control component 3.

[0023] like Figures 1 to 3 As shown, the control component 3 includes a metal chassis 31, with a front panel 32 on the front of the metal chassis 31. The front panel 32 has multiple ports 33 and status indicator lights 34. The ports 33 include an external screen port 331, a network port 332, a USB external port 333, an external system port 334, and a power port 335. The external screen port 331 is electrically connected to the industrial touch screen 13. The status indicator lights 34 include a power indicator light, a running status indicator light, and a fault indicator light.

[0024] like Figure 4As shown, the dual-redundant power supply module 2 includes a housing 21, a main power supply module 22, and a backup power supply module 23. Two vertically distributed receiving slots 211 are provided on one side of the housing 21. The main power supply module 22 and the backup power supply module 23 are respectively inserted into the two receiving slots 211, and both the main power supply module 22 and the backup power supply module 23 are detachably connected to the housing 21. The output terminals of the main power supply module 22 and the backup power supply module 23 are connected in parallel through internal redundancy modules. One end of both the main power supply module 22 and the backup power supply module 23 is provided with a push-pull handle 221 for removal. Several heat dissipation holes 24 are provided on the surface of the housing 21.

[0025] like Figure 4 As shown, the dual redundant power supply module 2 is also equipped with a power failure alarm relay. One end of the power failure alarm relay is electrically connected to the internal redundant module, and the other end of the power failure alarm relay is electrically connected to the SIS system.

[0026] The working principle of this utility model is as follows: The cabinet box 1 is the main body, and the control component 3 and the dual redundant power supply module 2 are connected inside by guide rail 4, so that no sensors or samplers need to be installed and maintained on site; the internal components are connected by guide rail 4, so that the internal components can be pulled out or pushed in during the operation of the equipment without removing the cables, ensuring the continuous operation of the SIS system and control component 3.

[0027] The control component 3 is electrically connected to external devices via multiple connectors 33 to enable data transmission and interaction. The external screen connector 331 connects to the industrial touchscreen 13, displaying real-time monitoring data such as coal powder fineness, allowing operators to intuitively understand the coal powder status. The network connector 332 communicates with the SIS and DCS systems via the power plant's internal LAN, transmitting not only the calculation results of coal powder fineness but also receiving operating parameters from the coal mill, achieving bidirectional information flow. The USB external connector 333 facilitates the export of historical monitoring data, system logs, or the import of update programs, enhancing the maintainability and scalability of the equipment.

[0028] In terms of power management, the design of the dual redundant power supply module 2 ensures zero-interruption operation of the control component 3 and the industrial touch screen 13 during main and backup power switching, greatly improving the stability and reliability of the system. When the main power supply module 22 fails, the backup power supply module 23 starts immediately, and the power failure alarm relay activates, quickly uploading the power failure signal to the SIS system, further triggering the corresponding protection measures of the DCS system, effectively avoiding system downtime or data loss due to power problems.

[0029] Furthermore, this invention achieves rapid assembly / disassembly and precise return of components through a dual magnetic levitation return module 5. This module utilizes the air gap levitation effect generated by the opposing poles of permanent magnets 52 to reduce mechanical contact friction between the sliding groove and the sliding rod, making the component easier and less strenuous to pull out or push in. Simultaneously, the principle of repulsion between like poles provides good damping during component extraction or insertion, ensuring the component remains stably in the designated position.

[0030] In the description of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.

[0032] Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. An online monitoring box for the fineness of pulverized coal in a boiler, characterized in that: Includes a cabinet (1), inside which a dual redundant power supply module (2) and a control component (3) are connected via guide rails (4). The control component (3) is externally connected to the SIS system and is electrically connected to the dual redundant power supply module (2). The guide rail (4) includes a mounting base (41), the top of which is slidably connected to a first guide rail (42) of H-shape, and the top of the first guide rail (42) is detachably connected to a second guide rail (43); the mounting base (41) and the second guide rail (43) are both U-shaped and arranged opposite to each other; the mounting base (41) can be detachably installed inside the cabinet socket (1); the mounting base (41) is provided with straight first sliding grooves (411) on both sides; the first guide rail (42) is provided with a second sliding groove (421) on the upper layer, and a movable sliding rod (422) is provided on the lower layer of the first guide rail (42); the second sliding groove (421) is generally arranged in a horizontal J-shape, and the movable sliding rod (422) is slidably locked in the first sliding groove (411); the second guide rail (43) is provided with a second sliding rod (431) at the bottom end, and the second sliding rod (431) is slidably locked in the second sliding groove (421); The control component (3) and the dual redundant power supply module (2) are respectively mounted on the top of the two second rails (43).

2. The boiler pulverized coal fineness online monitoring box according to claim 1, characterized in that: The top of the mounting base (41) and the bottom of the first guide rail (42) are each provided with a dual magnetic levitation return module (5). The dual magnetic levitation return module (5) includes a fixed outer frame (51). A permanent magnet (52) is sleeved in the inner ring of the fixed outer frame (51). The fixed outer frame (51) is provided with a plurality of positioning pins (53) for insertion and fixing. The mounting base (41) and the first guide rail (42) are each provided with positioning grooves (54) corresponding to the positioning pins (53).

3. The boiler pulverized coal fineness online monitoring box according to claim 1, characterized in that: The cabinet (1) includes a cabinet (11), with a hinged cover (12) on the front of the cabinet (11), and an industrial touch screen (13) for displaying the fineness of coal powder is fixedly connected to the top of the cabinet (11). The industrial touch screen (13) is electrically connected to the control component (3).

4. The boiler pulverized coal fineness online monitoring box according to claim 1, characterized in that: The control component (3) includes a metal chassis (31), and a front panel (32) is provided on the front of the metal chassis (31). The front panel (32) is provided with multiple plug-in interfaces (33) and status indicator lights (34). The plug-in interfaces (33) include an external screen socket (331), a network socket (332), a USB external socket (333), an external system socket (334), and a power socket (335). The external screen socket (331) is electrically connected to the industrial touch screen (13). The status indicator lights (34) include a power indicator light, a running status indicator light, and a fault indicator light.

5. The boiler pulverized coal fineness online monitoring box according to claim 3, characterized in that: The dual redundant power supply module (2) includes a housing (21), a main power supply module (22), and a backup power supply module (23). The housing (21) has two vertically distributed receiving slots (211) on one side. The main power supply module (22) and the backup power supply module (23) are respectively inserted into the two receiving slots (211). The main power supply module (22) and the backup power supply module (23) are detachably connected to the housing (21). The output terminals of the main power supply module (22) and the backup power supply module (23) are connected in parallel through internal redundant modules. One end of the main power supply module (22) and the backup power supply module (23) is provided with a push-pull handle (221) for removal. The surface of the housing (21) is provided with several heat dissipation holes (24).

6. The boiler pulverized coal fineness online monitoring box according to claim 5, characterized in that: The dual redundant power supply module (2) is also equipped with a power failure alarm relay. One end of the power failure alarm relay is electrically connected to the internal redundant module, and the other end of the power failure alarm relay is electrically connected to the SIS system.

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