Portable valve flow characteristic online diagnosis device

Abstract

The utility model relates to a portable valve flow characteristic on-line diagnostic device, and belongs to the technical field of machine-network coordination and digital electro-hydraulic system. The device comprises a host, a host power button, a portable device shell, a data acquisition module, an on-line diagnosis module and an on-line monitor, the host is fixed in an internal frame of the portable device shell, and the host power button is integrated on the surface of the portable device shell. The data acquisition module comprises a wiring terminal board, a wiring terminal, a communication terminal, a communication cable, a data acquisition card and a data acquisition card holder, the data acquisition module is connected with the wiring terminal board through the communication cable, the wiring terminal board is provided with the wiring terminal and the communication terminal, and the data acquisition card is matched with the data acquisition card holder. The device is reasonable in structural design, safe and reliable, current valve flow characteristic monitoring is improved, the problem of machine-network coordination real-time performance adjustment caused by improvement of a unit operation mode by an operator is solved, and use requirements are met.

Description

Technical Field

[0001] This utility model relates to an online diagnostic device, and more particularly to a portable valve flow characteristic online diagnostic device, which belongs to the field of machine-network coordination and digital electro-hydraulic technology. Background Technology

[0002] The valve flow characteristics of a steam turbine affect power stability, valve throttling losses, and load stability. Its valve flow characteristics directly affect the coordinated regulation performance of the generator and the grid. This is mainly because as the maintenance and operation time of steam turbine valves increases, their flow characteristics will deviate from the ideal state. Secondly, different operating modes of the unit will also cause the valve flow to deviate from the ideal state, all of which will lead to the unit's load regulation performance deviating from the target state.

[0003] In response to these problems, experts and scholars have conducted extensive research on the optimization of generator-grid coordinated control, achieving fruitful results. However, these studies have all been conducted after the fact, without achieving online monitoring of valve regulation status. This has prevented timely correction and guidance for improving unit operation modes, and valve flow characteristics issues continue to plague unit operators. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings in the existing technology and provide a portable online valve flow characteristic diagnostic device with reasonable structural design, safety and reliability, to improve the current valve flow characteristic monitoring and solve the problem of real-time performance adjustment of machine-network coordination brought about by operators improving the unit operation mode.

[0005] The technical solution adopted by this utility model to solve the above problems is as follows: This portable valve flow characteristic online diagnostic device includes a main unit, a main unit power button, and a portable device shell. The main unit is fixed in the internal frame of the portable device shell, and the main unit power button is integrated on the surface of the portable device shell. The device is characterized by further including a data acquisition module, an online diagnostic module, and an online monitoring module connected in sequence. The data acquisition module includes a terminal block, terminals, communication terminals, a communication cable, a data acquisition card, and a data acquisition card holder. The data acquisition module is connected to the terminal block via a communication cable. The terminal block is provided with terminals and communication terminals, and the data acquisition card matches the data acquisition card holder.

[0006] Preferably, the present invention also includes a display screen, and the online monitoring system is equipped with a display screen.

[0007] Preferably, the present invention also includes a serial communication interface, wherein the terminal block and the data acquisition card adopt a serial communication interface to realize data acquisition.

[0008] Preferably, the present invention also includes a power terminal, which is integrated on the surface of the portable device housing.

[0009] Preferably, the present invention also includes a host locking pin, which is located on the side of the host and is fixed by mechanical locking.

[0010] Preferably, the data acquisition module of this utility model acquires the load increase execution process, the load decrease execution process, the integrated valve position, CV1, CV2, CV3 and CV4, and the actual load signal.

[0011] Preferably, the online diagnostic module of this utility model enables online diagnosis of valve flow "adjustment idle stroke" and "abnormal valve flow characteristics".

[0012] Preferably, the online monitoring and real-time display online diagnostic module of this utility model outputs "empty trip" and "abnormal flow characteristics" alarms and issues an audible alarm to remind the operation and monitoring personnel.

[0013] Compared with the prior art, this utility model has the following advantages and effects: the overall structure is reasonably designed and safe and reliable. It is a portable valve flow characteristic online monitoring device developed in the real-time operation of steam turbines in thermal power plants. This application takes into account the real-time flow characteristics of valve operation, diagnoses the operating status online, and automatically issues an alarm when abnormal regulation is detected. It can also diagnose and monitor valve flow characteristics in real time, thus meeting the usage requirements. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model. Figure 1 .

[0015] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present utility model. Figure 2 .

[0016] Figure 3 This is a schematic diagram of the overall structure of an embodiment of the present utility model. Figure 3 .

[0017] Figure 4 This is a schematic diagram of an embodiment of the present invention.

[0018] In the diagram: Data acquisition module S, online diagnostic module Z, online monitoring L; terminal block 1, terminal block 2, communication terminal 3, communication cable 4, data acquisition card 5, power terminal 6, internal power cable 7, data acquisition card slot 8, host 9, host card pin 10, host power button 11, portable device casing 12, display screen 13, serial communication interface 14. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0020] Example.

[0021] See Figures 1 to 4 The portable valve flow characteristic online diagnostic device in this embodiment includes a main unit 9, a main unit power button 11, a portable device housing 12, a data acquisition module S, an online diagnostic module Z, and an online monitoring module L, which are connected in sequence.

[0022] In this embodiment, the data acquisition module S includes a terminal block 1, a terminal block 2, a communication terminal 3, a communication cable 4, a data acquisition card 5, and a data acquisition card holder 8. The data acquisition module S is connected to the terminal block 1 through the communication cable 4. The terminal block 1 is provided with a terminal block 2 and a communication terminal 3. The data acquisition card 5 is matched with the data acquisition card holder 8.

[0023] In this embodiment, a display screen 13 is installed inside the online monitoring L.

[0024] In this embodiment, the terminal block 1 and the data acquisition card 5 use a serial communication interface 14 to achieve data acquisition.

[0025] In this embodiment, the data acquisition module S acquires the load increase execution process, the load decrease execution process, the integrated valve position, CV1, CV2, CV3 and CV4, and the actual load signal.

[0026] In this embodiment, the online diagnostic module Z realizes online diagnosis of valve flow "adjustment idle stroke" and "abnormal valve flow characteristics".

[0027] In this embodiment, the online monitoring L displays the "empty trip" and "abnormal flow characteristics" alarms output by the online diagnostic module Z in real time, and issues an audible alarm to remind the operation and monitoring personnel.

[0028] In this embodiment, the portable device housing 12 is the main structure of the device, used to fix and protect the internal components.

[0029] In this embodiment, the power terminal 6 and the host power button 11 are integrated on the surface of the portable device shell 12, and the host 9 and the data acquisition card slot 8 are fixed in the internal frame of the portable device shell 12.

[0030] In this embodiment, the power terminal 6 is located at the power interface of the housing, which is responsible for external power input and supports types such as quick-connect terminals or cold-pressed terminals.

[0031] In this embodiment, the internal power cable 7 extends from the power terminal 6 to the power module of the host 9, and is connected to the power supply interface of the data acquisition card slot 8 via a splitter.

[0032] In this embodiment, the data acquisition card slot 8 is fixed in the motherboard expansion slot area of ​​the host 9 and is used to insert the data acquisition card 5.

[0033] In this embodiment, the main unit locking pin 10 is located on the side of the main unit 9 and is fixed by mechanical locking to prevent loosening.

[0034] In this embodiment, the host power button 11 is integrated into the panel (such as the top or front) of the portable device housing 12 and is connected to the host power control module through an internal cable; it triggers the host power on / off and ensures operational safety through an anti-accidental touch design.

[0035] The working principle of the entire device in this embodiment is as follows: First, signals such as the load increase execution process, the load decrease execution process, the integrated valve position, CV1, CV2, CV3 and CV4, and the actual load are connected to the wiring terminals to achieve data acquisition. Then, based on the acquired parameters, the flow characteristic status of the turbine valves is analyzed online to diagnose the unit's load regulation performance, identifying operating states such as "regulation idle stroke" and "abnormal flow characteristics," thus resolving abnormal load regulation performance issues. The specific control process is as follows:

[0036] Step 1: Run the application based on the LabVIEW platform.

[0037] Step 2: Collect signals such as load increase execution process, load decrease execution process, integrated valve position, CV1, CV2, CV3 and CV4, and actual load.

[0038] Step 3: Online real-time diagnosis of turbine valve flow characteristic regulation status, real-time identification of unit "upward empty stroke, downward empty stroke" and "abnormal valve flow characteristics".

[0039] (1) Diagnosis of saturation state, the criteria are: ① "x≤Comprehensive valve position≤100%", then report "upward empty stroke", where x is the comprehensive valve position that makes the last regulating valve at the empty stroke critical point. This parameter is set according to the actual operating state. ② "x+5%≤Comprehensive valve position≤100%", then report "upward empty stroke" and "downward empty stroke", which are combined into "regulation saturation" alarm.

[0040] (2) “Abnormal flow characteristics”, the criterion is “comprehensive valve position ≤ x-5%”. During the load increase or load decrease process, and the valve positions of CV1-CV4 are all less than y, where y is the valve’s empty stroke critical value. Within a certain period of time, if the absolute value of the load change rate is less than the speed setting value (according to the standard setting), then “abnormal valve flow characteristics” will be reported.

[0041] Step 4: The portable online monitoring device CRT displays the unit's "upward empty stroke, downward empty stroke" and "abnormal valve flow characteristics" information in real time, and stores historical trends for easy access.

[0042] Based on the above description, those skilled in the art are already able to implement it.

[0043] Furthermore, it should be noted that the specific embodiments described in this specification may differ in the shape and name of their components. The above description is merely illustrative of the structure of this utility model. All equivalent or simple variations made based on the structure, features, and principles described in this utility model patent concept are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, all of which should fall within the protection scope of this utility model.

Claims

1. A portable valve flow characteristic online diagnostic device, comprising a main unit (9), a main unit power button (11), and a portable device housing (12), wherein the main unit (9) is fixed in the internal frame of the portable device housing (12), and the main unit power button (11) is integrated on the surface of the portable device housing (12), characterized in that: It also includes a data acquisition module (S), an online diagnostic module (Z), and an online monitoring module (L) connected in sequence. The data acquisition module (S) includes a terminal block (1), a terminal block (2), a communication terminal (3), a communication cable (4), a data acquisition card (5), and a data acquisition card holder (8). The data acquisition module (S) is connected to the terminal block (1) through the communication cable (4). The terminal block (1) is provided with a terminal block (2) and a communication terminal (3). The data acquisition card (5) is matched with the data acquisition card holder (8).

2. The portable valve flow characteristic online diagnostic device according to claim 1, characterized in that: It also includes a display screen (13), which is installed inside the online monitor (L).

3. The portable valve flow characteristic online diagnostic device according to claim 1, characterized in that: It also includes a serial communication interface (14), and the terminal block (1) and the data acquisition card (5) use the serial communication interface (14) to realize data acquisition.

4. The portable valve flow characteristic online diagnostic device according to claim 1, characterized in that: It also includes a power terminal (6), which is integrated on the surface of the portable device housing (12).

5. The portable valve flow characteristic online diagnostic device according to claim 1, characterized in that: It also includes a host card pin (10), which is located on the side of the host (9) and is fixed by mechanical locking.

6. The portable valve flow characteristic online diagnostic device according to claim 1, characterized in that: The data acquisition module (S) acquires the load increase execution process, the load decrease execution process, the integrated valve position, CV1, CV2, CV3 and CV4, and the actual load signal.

7. The portable valve flow characteristic online diagnostic device according to claim 1, characterized in that: The online diagnostic module (Z) enables online diagnosis of valve flow "adjustment idle stroke" and "abnormal valve flow characteristics".

8. The portable valve flow characteristic online diagnostic device according to claim 1, characterized in that: The online monitoring (L) displays the "empty trip" and "abnormal flow characteristics" alarms output by the online diagnostic module (Z) in real time, and issues an audible alarm to remind the operation and monitoring personnel.

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