Method and system for controlling valve adjusting fault of sealing fan driven by monitoring disk model

Abstract

The invention discloses a control method and system for valve adjusting faults of a sealed fan driven by a prison disk model. The system comprises a first AND module, a first OR module, a first smaller 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 larger comparison module, a third AND module, a fourth OR module, a fifth pulse module and a fourth AND module. And the sealing fan is automatically started, stopped and started in sequence. According to the method, the B sealing fan is started based on the valve-adjusting jamming fault and the valve-adjusting oscillation fault in a combined mode as judgment criteria, the faults are processed in time through regular model inspection, the requirements of operators for strengthening preventive measures and special maintenance for special equipment are met, the faults of the sealing fan valve adjusting can be effectively controlled, and the service life of the sealing fan valve adjusting is prolonged. And normal and stable operation of the system is ensured.

Description

Technical Field

[0001] The invention belongs to the field of intelligent control of thermal power plants, and in particular relates to a sealed fan regulating valve fault control method and system driven by a monitoring panel model. Background Art

[0002] The possible faults of the sealed fan valve during operation include the following: unstable air volume regulation, when the valve opening changes, the air volume fails to be stably regulated as expected; air leakage, the valve is not closed tightly or the seal is damaged, resulting in gas leakage; abnormal noise, the valve makes abnormal noise during operation, which may be caused by mechanical failure or air flow disorder; excessive vibration, the valve or its connecting parts vibrate significantly, affecting the stability of the system. In view of the above reasons, it is urgent to design a monitoring model-driven sealed fan valve fault control method and system to realize real-time monitoring of the equipment operation status and timely discover and deal with potential problems. Summary of the invention

[0003] The purpose of the present invention is to provide a method and system for controlling the failure of a sealed fan valve regulating valve driven by a monitoring model. The present invention adopts the method of starting the B sealed fan based on the failure of the regulating valve jamming and the method of starting the B sealed fan based on the failure of the regulating valve oscillation as the judgment basis. Through regular inspection and timely handling of faults by the model, the operating personnel can meet the needs of strengthening preventive measures and special maintenance for special equipment, which can effectively control the failure of the sealed fan valve regulating valve and ensure the normal and stable operation of the system.

[0004] In order to achieve the above object, the present invention adopts the following technical solution: The sealed fan valve regulating fault control system 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 sealed fan, stop permission of the sealed fan and sequential start of the sealed fan; The first less than comparison module is connected to the second AND module and the first pulse module in sequence, the first NOT module is connected to the second pulse module, the output end of the first pulse module and the output end of the second pulse module are both connected to the second OR module, and the output end of the second OR module is connected to the first AND module; the output end of the third pulse module and the output end of the fourth pulse module are both connected to the third OR module; the output end of the first AND module and the output end of the third OR module are both connected to the first OR module, and the output end of the first OR module is connected to the automatic start of the sealed fan; The output end of the first greater than comparison module is connected to the third AND module, the output end of the third AND module is connected to the fourth OR module, and the output end of the fourth OR module is connected to the sealing fan stop permission; The output end of the fifth pulse module is connected to the fourth AND module, and the output end of the fourth AND module is connected to the sealed fan sequential control start.

[0005] A further improvement of the present invention is that the standby input is connected to the first AND module.

[0006] A further improvement of the present invention is that the sealing air and primary air differential pressures are connected to a first less than comparison module and a first greater than comparison module respectively.

[0007] A further improvement of the present invention is that the A sealed fan is respectively connected to the second AND module, the first NON module and the third AND module in operating state.

[0008] A further improvement of the present invention is that a stuck fault of the regulating valve is linked to start the B sealed fan connected to the third pulse module.

[0009] A further improvement of the present invention is that the regulating valve oscillation failure links the B sealed fan to the fourth pulse module.

[0010] A further improvement of the present invention is that all coal mills are stopped connected to the fourth or module.

[0011] A further improvement of the present invention is that the APS trigger is connected to the fifth pulse module.

[0012] A further improvement of the invention is that the device is connected to the fourth module at the working position.

[0013] A monitoring model-driven sealed fan valve fault control method, wherein the monitoring model-driven sealed fan valve fault control system comprises: When the standby input is 1, the operating state of sealed fan A is 1, and the differential pressure between the sealed air and the primary air satisfies the first condition that it is less than the built-in constant 1.5 of the comparison module, the sealed fan automatically starts and is 1; when the operating state of sealed fan A is 0, or the regulating valve is stuck and the sealed fan B is started and is 1, or the regulating valve oscillation fault and the sealed fan B is started and is 1, if any of the above three conditions are met, the sealed fan automatically starts and is 1; A sealed fan running state is 1, when the differential pressure between the sealed air and the primary air satisfies the first greater than the built-in constant 2 of the comparison module, the sealed fan stop permission is 1; when all coal mills stop is 1, the sealed fan stop permission is 1; When the APS trigger is 1 and the equipment is in the working position, the sealing fan sequence start is 1.

[0014] Compared with the prior art, the present invention has at least the following beneficial technical effects: The present invention provides a monitoring model driven sealed fan valve fault control method, which adopts data modeling and fault location methods. The model dynamically checks whether the air valve is stuck or blocked. If it is, it needs to be cleaned or replaced. If the model does not find obvious obstacles, it needs to check whether the internal structure of the air valve is damaged and needs to be repaired or replaced.

[0015] The present invention provides a monitoring model-driven sealed fan valve fault control system, which adopts a diagnostic system combined with a fault model to diagnose possible faults of the sealed fan valve, combines real-time monitoring data and historical fault records, and analyzes the fault model to quickly and accurately identify the type and location of the fault.

[0016] In summary, the sealed fan valve regulating fault control method and system driven by a monitoring model described in the present invention formulates corresponding control strategies according to the fault diagnosis results, including adjusting the opening of valves, changing the system operation mode or starting the backup system, etc., so as to minimize the impact of the fault on the system and meet the requirements of safe and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is the schematic diagram of the sealed fan valve fault control system driven by the monitoring model.

[0019] Figure 2 This is a rendering of an embodiment of the present invention.

[0020] Description of reference numerals: 001, standby input, 002, differential pressure between sealed air and primary air, 003, operating status of sealed fan A, 004, regulating valve stuck fault, start sealed fan B, 005, regulating valve oscillation fault, start sealed fan B, 006, all coal mills stop, 007, APS trigger, 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 sealed fan, 026, stop permission of sealed fan, 027, sequential start of sealed fan. DETAILED DESCRIPTION

[0021] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0026] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0027] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0028] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0029] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0030] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] The purpose of the present invention is to provide a method and system for controlling the failure of a sealed fan valve regulating valve driven by a monitoring model. The present invention adopts the method of starting the B sealed fan based on the failure of the regulating valve jamming and the method of starting the B sealed fan based on the failure of the regulating valve oscillation as the judgment basis. Through regular inspection and timely handling of faults by the model, the operating personnel can meet the needs of strengthening preventive measures and special maintenance for special equipment, which can effectively control the failure of the sealed fan valve regulating valve and ensure the normal and stable operation of the system.

[0032] Example 1 like Figure 1 As shown, the sealed fan valve regulating fault control system 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, a sealed fan automatic start 025, a sealed fan stop permission 026 and a sealed fan sequential control start 027; the first less than comparison module 011 is connected to the second AND module 012 and the first pulse module 013 in sequence, the first NOT module 015 is connected to the second pulse module 016, the first pulse module 013 The output end and the output end of the second pulse module 016 are both connected to the second OR module 014, and the output end of the second OR module 014 is connected to the first AND module 009; the output end of the third pulse module 017 and the output end of the fourth pulse module 019 are both connected to the third OR module 018; the output end of the first AND module 009 and the output end of the third OR module 018 are both connected to the first OR module 010, and the output end of the first OR module 010 is connected to the sealed fan automatic start 025; the output end of the first greater than comparison module 020 is connected to the third AND module 021, the output end of the third AND module 021 is connected to the fourth OR module 022, and the output end of the fourth OR module 022 is connected to the sealed fan stop permission 026; the output end of the fifth pulse module 023 is connected to the fourth AND module 024, and the output end of the fourth AND module 024 is connected to the sealed fan sequential control start 027.

[0033] The present invention realizes complex logic 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 the AND module, the OR module, and the NOT module). This design enables the system to automatically adjust the output control signal according to the change of the input signal, thereby realizing intelligent control of the sealing fan valve failure.

[0034] The present invention introduces multiple pulse modules (such as the first pulse module 013, the second pulse module 016, etc.), which can generate pulse signals for controlling the start and stop of the sealed fan. Pulse control has the advantages of fast response speed and high control accuracy, and can meet the demand for rapid response to the sealing fan valve failure.

[0035] The present invention realizes automatic detection and processing of sealing fan valve failure through logical judgment and pulse control. When a failure is detected, the system can automatically adjust the control strategy, such as starting a spare fan or issuing a failure alarm, to ensure continuous and stable operation of the system.

[0036] In this embodiment, the standby input 001 is connected to the first AND module 009 .

[0037] In this embodiment, the sealing air and primary air differential pressure 002 is connected to the first less than comparison module 011 and the first greater than comparison module 020 respectively.

[0038] In this embodiment, the A sealed fan operating state 003 is respectively connected to the second AND module 012, the first non-module 015 and the third AND module 021.

[0039] In this embodiment, the regulating valve stuck fault links the B sealed fan 004 to the third pulse module 017.

[0040] In this embodiment, the valve oscillation fault-linked B sealed fan 005 is connected to the fourth pulse module 019.

[0041] In this embodiment, the coal mill all stops 006 connected to the fourth or module 022.

[0042] In this embodiment, the APS trigger 007 is connected to the fifth pulse module 023 .

[0043] In this embodiment, the device is connected to the fourth AND module 024 in the working position 008 .

[0044] Example 2 like Figure 1As shown, the sealed fan valve regulating fault control system driven by the monitoring model provided by the present invention includes: standby input 001, differential pressure of sealed air and primary air 002, operating status of sealed fan A 003, joint start of sealed fan B due to valve jamming fault 004, joint start of sealed fan B due to valve oscillation fault 005, all coal mills stopped 006, APS triggered 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 sealed fan 025, stop permission of sealed fan 026 and sequential control start of sealed fan 027.

[0045] Among them, the sealed wind and primary air differential pressure 002 is connected to the first less than comparison module 011, the second and module 012, and the first pulse module 013 in sequence, the A sealed fan operation status 003 is connected to the second and module 012, the A sealed fan operation status 003 is connected to the first non-module 015 and the second pulse module 016 in sequence, the output end of the first pulse module 013 and the output end of the second pulse module 016 are both connected to the second or module 014, the output end of the second or module 014 and the standby input 001 are both connected to the first and module 009; the regulating valve stuck fault linked to start the B sealed fan 004 is connected to the third pulse module 017, the regulating valve oscillation fault linked to start the B sealed fan 005 is connected to the fourth pulse module 019, the output end of the third pulse module 017 and the output end of the fourth pulse module 019 are both connected to the third or module 018; the output end of the first and module 009 and the output end of the third or module 018 are both connected to the first or module 010, and the output end of the first or module 010 is connected to the sealed fan automatic start 025.

[0046] The sealed air and primary air differential pressure 002 is connected to the first greater than comparison module 020, the output end of the first greater than comparison module 020 and the A sealed fan operating status 003 are both connected to the third AND module 021, the output end of the third AND module 021 and the coal mill all stop 006 are both connected to the fourth OR module 022, and the output end of the fourth OR module 022 is connected to the sealed fan stop permission 026.

[0047] The APS trigger 007 is connected to the fifth pulse module 023, the output end of the fifth pulse module 023 and the device in the working position 008 are connected to the fourth AND module 024, and the output end of the fourth AND module 024 is connected to the sealed fan sequential control start 027.

[0048] Example 3 like Figure 1 As shown, the sealing fan valve regulating fault control method driven by the monitoring model provided by the present invention includes: 1) When the standby input 001 is 1, the operating state of sealed fan A 003 is 1, and the differential pressure 002 between the sealed air and the primary air satisfies the first value less than the built-in constant 1.5 of the comparison module 011, the sealed fan automatically starts 025 and the operating state 003 of sealed fan A is 1; when the operating state 003 of sealed fan A is 0, or the regulating valve stuck fault links to start sealed fan B 004 and the regulating valve oscillation fault links to start sealed fan B 005 and the regulating valve oscillation fault links to start sealed fan B 005 and the sealing fan automatically starts 02 ...

[0049] 2) When the A sealed fan operating state 003 is 1 and the differential pressure 002 between the sealed air and the primary air satisfies the first greater than the built-in constant 2 of the comparison module 020, the sealed fan stop permission 026 is 1; when all coal mills stop 006 is 1, the sealed fan stop permission 026 is 1.

[0050] 3) When APS trigger 007 is 1 and the equipment is in the working position 008 is 1, the sealing fan sequential control start 027 is 1.

[0051] Example 4 like Figure 2 As shown, by implementing and applying the technology of the present invention in a simulation environment, within the range of 0-100% valve control, the valve opening state under various types of working conditions is simulated, and the control method required for valve adjustment under various flow changes can be effectively perceived in advance. The simulation results show that the valve opening can be predicted and a high consistency is achieved, which provides assistance for the monitoring operation of production operators. Through reasonable and effective operation methods, various types of unsafe factors can be avoided, and at the same time, the production and operation efficiency of the unit is also improved.

[0052] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0053] In addition, it should be understood that although this specification is described in accordance with the implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution according to the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

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

2. The sealed fan valve fault control system driven by the monitoring model according to claim 1 is characterized in that: The standby input (001) is connected to the first AND module (009).

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

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

5. The sealed fan valve regulating fault control system driven by the monitoring model according to claim 4 is characterized in that: The jamming of the regulating valve causes the B sealing fan (004) to be connected to the third pulse module (017).

6. The sealed fan valve regulating fault control system driven by the monitoring model according to claim 5 is characterized in that: The valve oscillation fault causes the B sealing fan (005) to be connected to the fourth pulse module (019).

7. The sealed fan valve regulating fault control system driven by the monitoring model according to claim 6 is characterized in that: All coal mills stop (006) connected to the fourth or module (022).

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

9. The sealed fan valve regulating fault control system driven by the monitoring model according to claim 8 is characterized in that: The device is connected to the fourth module (024) at the working position (008).

10. A sealed fan valve fault control method driven by a monitoring model, characterized in that: The method is based on the sealed fan valve regulating fault control system driven by the monitoring model described in claim 9, and comprises: When the standby input (001) is 1, the A sealed fan operation state (003) is 1, and the differential pressure (002) between the sealed air and the primary air satisfies the first less than the built-in constant 1.5 of the comparison module (011), the sealed fan automatic start (025) is 1; the A sealed fan operation state (003) is 0, or the regulating valve stuck fault linked to the B sealed fan (004) is 1, or the regulating valve oscillation fault linked to the B sealed fan (005) is 1, when any of the above three conditions is met, the sealed fan automatic start (025) is 1; A. When the operating state of the sealed fan (003) is 1 and the differential pressure (002) between the sealed air and the primary air satisfies the first greater than the built-in constant 2 of the comparison module (020), the sealed fan stop permission (026) is 1; when the coal mill stops completely (006) is 1, the sealed fan stop permission (026) is 1; When APS Trigger (007) is 1 and the Equipment in Working Position (008) is 1, the Seal Fan Sequential Start (027) is 1.

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