Seal fan regulating valve fault control method and system driven by disk monitoring model

Abstract

The application discloses a sealed fan valve control method and system driven by a monitoring disk model, which comprises a first and module, a first or module, a first less than comparison module, a second and module, a first pulse module, a second or module, a first non-module, a second pulse module, a third pulse module, a third or module, a fourth pulse module, a first greater than comparison module, a third and module, a fourth or module, a fifth pulse module, a fourth and module, a sealed fan automatic start, a sealed fan stop permission and a sealed fan sequential control start. The application takes the joint start of B sealed fan and valve oscillation fault as the judgment criterion based on the valve sticking fault, and meets the needs of the operation personnel to strengthen the preventive measures and the special maintenance requirements of special equipment by regularly checking the model and timely processing the fault, so that the sealed fan valve fault can be effectively controlled, and the normal and smooth operation of the system can be ensured.

Description

Technical Field

[0001] This invention belongs to the field of intelligent control of thermal power plants, specifically relating to a fault control method and system for a sealed fan regulating valve driven by a monitoring panel model. Background Technology

[0002] The following are possible faults that may occur during the operation of the sealing fan control valve: unstable airflow regulation, where the airflow fails to adjust stably as expected when the valve opening changes; air leakage, where the valve does not close tightly or the seals are damaged, leading to gas leakage; abnormal noise, where the control valve emits abnormal noise during operation, possibly due to mechanical failure or airflow disturbance; and excessive vibration, where significant vibration of the control valve or its connecting components affects system stability. To address these issues, there is an urgent need to design a monitoring model-driven fault control method and system for sealing fan control valves to achieve real-time monitoring of equipment operating status and timely detection and handling of potential problems. Summary of the Invention

[0003] The purpose of this invention is to provide a fault control method and system for a sealing fan regulating valve driven by a monitoring model. This invention adopts the joint start of the B sealing fan based on the valve jamming fault and the joint start of the B sealing fan based on the valve oscillation fault as the judgment criteria. Through regular inspection and timely handling of faults by the model, it meets the needs of operators to strengthen preventive measures and special maintenance for special equipment. It can effectively control the faults of the sealing fan regulating valve and ensure the normal and stable operation of the system.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The fault control system for the sealing fan regulating valve driven by the monitoring model includes a first AND module, a first OR module, a first less than comparison module, a second AND module, a first pulse module, a second OR module, a first NOT module, a second pulse module, a third pulse module, a third OR module, a fourth pulse module, a first greater than comparison module, a third AND module, a fourth OR module, a fifth pulse module, a fourth AND module, automatic start of the sealing fan, sealing fan stop permission, and sequential start of the sealing fan;

[0006] The first less than comparison module is connected in sequence to the second AND module and the first pulse module; the first NOT module is connected to the second pulse module; the output terminals of the first pulse module and the second pulse module are both connected to the second OR module; the output terminal of the second OR module is connected to the first AND module; the output terminals of the third pulse module and the fourth pulse module are both connected to the third OR module; the output terminals of the first AND module and the third OR module are both connected to the first OR module; the output terminal of the first OR module is connected to the automatic start of the sealing fan.

[0007] The output of the first greater than comparison module is connected to the third AND module, the output of the third AND module is connected to the fourth OR module, and the output of the fourth OR module is connected to the sealing fan stop permission.

[0008] The output of the fifth pulse module is connected to the fourth and fourth modules, and the output of the fourth and fourth modules is connected to the sequential start of the sealing fan.

[0009] A further improvement of the present invention is that the backup input is connected to the first module.

[0010] A further improvement of the present invention is that the differential pressure between the sealing air and the primary air is respectively connected to the first less-than comparison module and the first greater-than comparison module.

[0011] A further improvement of the present invention is that the A sealing fan is connected to the second AND module, the first non-AND module and the third AND module respectively in the operating state.

[0012] A further improvement of this invention is that the valve jamming fault is connected to the B sealing fan via the third pulse module.

[0013] A further improvement of this invention is that the valve oscillation fault triggering B sealing fan is connected to the fourth pulse module.

[0014] A further improvement of the present invention is that all coal mills are stopped from connecting to the fourth or third module.

[0015] A further improvement of the present invention is that the APS trigger is connected to the fifth pulse module.

[0016] A further improvement of the present invention is that the device is connected to the fourth module at the working position.

[0017] A fault control method for a sealing fan valve driven by a monitoring model, wherein the fault control system for the sealing fan valve driven by the monitoring model includes:

[0018] If the standby input is 1, the A sealing fan is in operation status 1, and the differential pressure between the sealing air and the primary air meets the requirement of being less than the built-in constant 1.5 of the comparison module, then the sealing fan will automatically start as 1; if the A sealing fan is in operation status 0, or if the regulating valve is stuck and starts the B sealing fan as 1, or if the regulating valve is oscillating and starts the B sealing fan as 1, then the sealing fan will automatically start as 1 if any of the above three conditions are met.

[0019] When the operating status of sealing fan A is 1, and the differential pressure between sealing air and primary air meets the first requirement of being greater than the built-in constant 2 of the comparison module, then the sealing fan stop permission is 1; when all coal mills stop, then the sealing fan stop permission is 1.

[0020] When the APS trigger is 1 and the device is in the working position, the sequential start of the sealing fan is 1.

[0021] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0022] This invention provides a fault control method for a sealing fan control valve driven by a monitoring model. It employs data modeling and fault location methods. The model dynamically checks whether the valve is stuck or blocked; if so, the obstructed part needs to be cleaned or replaced. If the model does not find any obvious obstruction, the internal structure of the valve needs to be checked for damage, requiring repair or replacement.

[0023] This invention provides a fault control system for a sealing fan control valve driven by a monitoring model. It adopts a diagnostic system combined with a fault model to diagnose possible faults in the sealing fan control valve. By combining real-time monitoring data and historical fault records, the type and location of the fault can be quickly and accurately identified through the analysis of the fault model.

[0024] In summary, the fault control method and system for a sealing fan valve driven by a monitoring model described in this invention formulates corresponding control strategies based on the fault diagnosis results, including adjusting the valve opening, changing the system's operating mode, or activating the backup system, in order to minimize the impact of the fault on the system and meet the requirements for safe and stable operation. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 The schematic diagram of a fault control system for a sealing fan regulating valve driven by a monitoring model.

[0027] Figure 2 This is a rendering of an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 001. Standby activation; 002. Differential pressure between sealing air and primary air; 003. Operating status of sealing fan A; 004. Control valve jamming fault triggers sealing fan B; 005. Control valve oscillation fault triggers sealing fan B; 006. All coal mills stop; 007. APS triggered; 008. Equipment in working position; 009. First AND module; 010. First OR module; 011. First less than comparison module; 012. Second AND module; 013. First pulse. Module 014, Second OR Module, 015, First NOT Module, 016, Second Pulse Module, 017, Third Pulse Module, 018, Third OR Module, 019, Fourth Pulse Module, 020, First Greater Than Comparison Module, 021, Third AND Module, 022, Fourth OR Module, 023, Fifth Pulse Module, 024, Fourth AND Module, 025, Automatic Start of Sealing Fan, 026, Sealing Fan Stop Allowed, 027, Sequential Start of Sealing Fan. Detailed Implementation

[0030] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0036] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0037] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0038] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0039] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0040] The purpose of this invention is to provide a fault control method and system for a sealing fan regulating valve driven by a monitoring model. This invention adopts the joint start of the B sealing fan based on the valve jamming fault and the joint start of the B sealing fan based on the valve oscillation fault as the judgment criteria. Through regular inspection and timely handling of faults by the model, it meets the needs of operators to strengthen preventive measures and special maintenance for special equipment. It can effectively control the faults of the sealing fan regulating valve and ensure the normal and stable operation of the system.

[0041] Example 1

[0042] like Figure 1 As shown, the fault control system for the sealing fan regulating valve driven by the monitoring model provided by the present invention includes a first AND module 009, a first OR module 010, a first less than comparison module 011, a second AND module 012, a first pulse module 013, a second OR module 014, a first NOT module 015, a second pulse module 016, a third pulse module 017, a third OR module 018, a fourth pulse module 019, a first greater than comparison module 020, a third AND module 021, a fourth OR module 022, a fifth pulse module 023, a fourth AND module 024, an automatic start mechanism for the sealing fan 025, a stop permission mechanism for the sealing fan 026, and a sequential start mechanism for the sealing fan 027. The first less than comparison module 011 is sequentially connected to the second AND module 012 and the first pulse module 013, the first NOT module 015 is connected to the second pulse module 016, and the first pulse module 013... The output terminals of the second pulse module 016 and the second pulse module 016 are both connected to the second OR module 014, and the output terminal of the second OR module 014 is connected to the first AND module 009; the output terminals of the third pulse module 017 and the fourth pulse module 019 are both connected to the third OR module 018; the output terminals of the first AND module 009 and the third OR module 018 are both connected to the first OR module 010, and the output terminal of the first OR module 010 is connected to the automatic start 025 of the sealing fan; the output terminal of the first greater than comparison module 020 is connected to the third AND module 021, the output terminal of the third AND module 021 is connected to the fourth OR module 022, and the output terminal of the fourth OR module 022 is connected to the stop permission 026 of the sealing fan; the output terminal of the fifth pulse module 023 is connected to the fourth AND module 024, and the output terminal of the fourth AND module 024 is connected to the sequential start 027 of the sealing fan.

[0043] This invention implements complex logical judgment and decision-making functions through comparison modules (such as the first less than comparison module 011 and the first greater than comparison module 020) and logic modules (such as AND, OR, and NOT modules). This design enables the system to automatically adjust the output control signal according to changes in the input signal, thereby achieving intelligent control of valve malfunctions in the sealing fan.

[0044] This invention incorporates multiple pulse modules (such as the first pulse module 013, the second pulse module 016, etc.), which generate pulse signals to control the starting and stopping actions of the sealing fan. Pulse control offers advantages such as fast response speed and high control accuracy, meeting the need for rapid response to valve malfunctions in the sealing fan.

[0045] This invention achieves automatic detection and handling of valve malfunctions in sealing fans through logical judgment and pulse control. When a fault is detected, the system can automatically adjust the control strategy, such as starting a backup fan or issuing a fault alarm, to ensure the continuous and stable operation of the system.

[0046] In this embodiment, the backup input 001 is connected to the first AND module 009.

[0047] In this embodiment, the differential pressure 002 between the sealing air and the primary air is connected to the first less than comparison module 011 and the first greater than comparison module 020, respectively.

[0048] In this embodiment, the A sealing fan operating state 003 is connected to the second AND module 012, the first non-module 015 and the third AND module 021 respectively.

[0049] In this embodiment, the valve jamming fault triggers the B sealing fan 004 to be connected to the third pulse module 017.

[0050] In this embodiment, the valve oscillation fault triggers the B sealing fan 005, which is connected to the fourth pulse module 019.

[0051] In this embodiment, all coal mills are stopped (006) and connected to the fourth OR module (022).

[0052] In this embodiment, the APS trigger 007 is connected to the fifth pulse module 023.

[0053] In this embodiment, the device is connected to the fourth module 024 at workstation 008.

[0054] Example 2

[0055] like Figure 1As shown, the fault control system for the sealing fan regulating valve driven by the monitoring model provided by the present invention includes: standby activation 001, differential pressure between sealing air and primary air 002, operating status of sealing fan A 003, valve jamming fault triggering of sealing fan B 004, valve oscillation fault triggering of sealing fan B 005, all coal mills stopped 006, APS triggering 007, equipment in working position 008, first AND module 009, first OR module 010, first less than comparison module 011, second AND module 012, first pulse module 013, second OR module 014, first NOT module 015, second pulse module 016, third pulse module 017, third OR module 018, fourth pulse module 019, first greater than comparison module 020, third AND module 021, fourth OR module 022, fifth pulse module 023, fourth AND module 024, automatic start of sealing fan 025, sealing fan stop permission 026, and sequential start of sealing fan 027.

[0056] Specifically, the differential pressure between the sealing air and the primary air 002 is sequentially connected to the first less than comparison module 011, the second AND module 012, and the first pulse module 013; the A sealing fan operating status 003 is connected to the second AND module 012; the A sealing fan operating status 003 is sequentially connected to the first NOT module 015 and the second pulse module 016; the output terminals of the first pulse module 013 and the second pulse module 016 are both connected to the second OR module 014; the output terminal of the second OR module 014 and the standby input 001 are both connected to the first AND module 009; the valve jamming fault triggering B sealing fan 004 is connected to the third pulse module 017; the valve oscillation fault triggering B sealing fan 005 is connected to the fourth pulse module 019; the output terminals of the third pulse module 017 and the fourth pulse module 019 are both connected to the third OR module 018; the output terminals of the first AND module 009 and the third OR module 018 are both connected to the first OR module 010; the output terminal of the first OR module 010 is connected to the sealing fan automatic start 025.

[0057] The differential pressure between the sealing air and the primary air 002 is connected to the first greater than comparison module 020. The output of the first greater than comparison module 020 and the A sealing fan running status 003 are both connected to the third AND module 021. The output of the third AND module 021 and the coal mill all stopped 006 are both connected to the fourth OR module 022. The output of the fourth OR module 022 is connected to the sealing fan stop permission 026.

[0058] APS trigger 007 is connected to the fifth pulse module 023. The output of the fifth pulse module 023 and the device in the working position 008 are both connected to the fourth AND module 024. The output of the fourth AND module 024 is connected to the sealing fan sequential start 027.

[0059] Example 3

[0060] like Figure 1 As shown, the fault control method for the regulating valve of a sealing fan driven by a monitoring model provided by the present invention includes:

[0061] 1) When the standby input 001 is 1, the A sealing fan operating status 003 is 1, and the differential pressure 002 between the sealing air and the primary air meets the first condition of being less than the built-in constant 1.5 of the comparison module 011, then the sealing fan automatically starts 025. When the A sealing fan operating status 003 is 0, or the valve jamming fault triggers the B sealing fan 004 to start, or the valve oscillation fault triggers the B sealing fan 005 to start, and any one of the above three conditions is met, then the sealing fan automatically starts 025.

[0062] 2) When the operating status of the sealing fan 003 is 1, and the differential pressure between the sealing air and the primary air 002 satisfies the first greater than the built-in constant 2 of the comparison module 020, then the sealing fan stop permission 026 is 1; when all coal mills stop 006 is 1, then the sealing fan stop permission 026 is 1.

[0063] 3) When APS trigger 007 is 1 and the equipment is in the working position 008 is 1, the sealing fan sequentially starts 027 and is 1.

[0064] Example 4

[0065] like Figure 2 As shown, through the implementation and application of the technology of this invention in a simulation environment, within the valve control range of 0-100%, the valve opening state under various operating conditions is simulated. This effectively allows for the early detection of the required valve control method under various flow rate changes. Simulation results demonstrate that the valve opening degree can be predicted with high consistency, assisting production operators in monitoring operations. Reasonable and effective operating methods can help avoid various unsafe factors, while also improving the unit's production efficiency.

[0066] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0067] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A fault control system for a sealing fan regulating valve driven by a monitoring model, characterized in that, Includes a first AND module (009), a first OR module (010), a first less than comparison module (011), a second AND module (012), a first pulse module (013), a second OR module (014), a first NOT module (015), a second pulse module (016), a third pulse module (017), a third OR module (018), a fourth pulse module (019), a first greater than comparison module (020), a third AND module (021), a fourth OR module (022), a fifth pulse module (023), a fourth AND module (024), an automatic start of the sealing fan (025), a stop permission for the sealing fan (026), and a sequential start of the sealing fan (027). The first less than comparison module (011) is connected in sequence to the second AND module (012) and the first pulse module (013), the first NOT module (015) is connected to the second pulse module (016), the output terminals of the first pulse module (013) and the second pulse module (016) are both connected to the second OR module (014), and the output terminal of the second OR module (014) is connected to the first AND module (009); the output terminals of the third pulse module (017) and the fourth pulse module (019) are both connected to the third OR module (018); the output terminals of the first AND module (009) and the third OR module (018) are both connected to the first OR module (010), and the output terminal of the first OR module (010) is connected to the automatic start of the sealing fan (025); The output of the first greater than comparison module (020) is connected to the third AND module (021), the output of the third AND module (021) is connected to the fourth OR module (022), and the output of the fourth OR module (022) is connected to the sealing fan stop allow (026). The output of the fifth pulse module (023) is connected to the fourth AND module (024), and the output of the fourth AND module (024) is connected to the sequential start of the sealing fan (027).

2. The fault control system for the sealing fan regulating valve driven by the monitoring model according to claim 1, characterized in that, The backup input (001) is connected to the first AND module (009).

3. The fault control system for the sealing fan regulating valve driven by the monitoring model according to claim 2, characterized in that, The differential pressure between the sealing air and the primary air (002) is connected to the first less than comparison module (011) and the first greater than comparison module (020), respectively.

4. The fault control system for the sealing fan regulating valve driven by the monitoring model according to claim 3, characterized in that, A sealing fan operating state (003) is connected to the second AND module (012), the first non-AND module (015) and the third AND module (021) respectively.

5. The fault control system for the sealing fan regulating valve driven by the monitoring model according to claim 4, characterized in that, When the valve jams, the B sealing fan (004) is connected to the third pulse module (017).

6. The fault control system for the sealing fan regulating valve driven by the monitoring model according to claim 5, characterized in that, The valve oscillation fault triggers the B sealing fan (005) to connect to the fourth pulse module (019).

7. The fault control system for a sealing fan regulating valve driven by a monitoring model according to claim 6, characterized in that, All coal mills are stopped (006) and connected to the fourth or module (022).

8. The fault control system for a sealing fan regulating valve driven by a monitoring model according to claim 7, characterized in that, The APS trigger (007) is connected to the fifth pulse module (023).

9. The fault control system for a sealing fan regulating valve driven by a monitoring model according to claim 8, characterized in that, The device is connected to the fourth module (024) at the workstation (008).

10. A fault control method for a sealing fan regulating valve driven by a monitoring model, characterized in that, This method, based on the monitoring model-driven fault control system for sealing fan valves as described in claim 9, includes: When the standby input (001) is 1, the A sealing fan operation status (003) is 1, and the differential pressure between the sealing air and the primary air (002) satisfies the first condition of being less than the built-in constant 1.5 of the comparison module (011), then the sealing fan automatically starts (025) is 1; when the A sealing fan operation status (003) is 0, or the valve jamming fault triggers the B sealing fan (004) to start (1), or the valve oscillation fault triggers the B sealing fan (005) to start (1), and any one of the above three conditions is met, then the sealing fan automatically starts (025) is 1. When the operating status (003) of the sealing fan is 1, and the differential pressure (002) between the sealing air and the primary air satisfies the first condition greater than the built-in constant 2 of the comparison module (020), then the sealing fan stop permission (026) is 1; when all coal mills stop (006) is 1, then the sealing fan stop permission (026) is 1. When APS trigger (007) is 1 and the device is in the working position (008) is 1, the sealing fan sequential start (027) is 1.

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