CN109933052B - Fault diagnosis system, rotating speed rack with fault diagnosis function and monitoring system - Google Patents
Fault diagnosis system, rotating speed rack with fault diagnosis function and monitoring system Download PDFInfo
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- CN109933052B CN109933052B CN201910358706.8A CN201910358706A CN109933052B CN 109933052 B CN109933052 B CN 109933052B CN 201910358706 A CN201910358706 A CN 201910358706A CN 109933052 B CN109933052 B CN 109933052B
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Abstract
The application relates to a fault diagnosis system, a rotating speed rack with a fault diagnosis function and a monitoring system, wherein the fault diagnosis system comprises a signal switching device and a fault diagnosis device. The signal switching device comprises a rotating speed signal input end, a first rotating speed signal output end and a second rotating speed signal output end, the rotating speed signal input end is electrically connected with the output end of the main pump rotating speed detection system, and the signal switching device is used for switching the rotating speed signals input by the rotating speed signal input end into two paths and outputting the rotating speed signals through the first rotating speed signal output end and the second rotating speed signal output end. The fault diagnosis device comprises an original signal input end and a rack signal input end, wherein a first rotating speed signal output end of the original signal input end is electrically connected, and the fault diagnosis device is used for receiving a rotating speed signal input by the original signal input end and a rack signal input by the rack signal input end and diagnosing fault equipment causing abnormal rotating speed according to the rotating speed signal and the rack signal.
Description
Technical Field
The application relates to the field of nuclear power stations, in particular to a fault diagnosis system, a rotating speed rack with a fault diagnosis function and a monitoring system.
Background
The reactor coolant pump (called as main pump for short) is the most important equipment of a loop system in a pressurized water reactor nuclear power station. In order to monitor the operation condition of the main pump, the rotating speed of the main pump needs to be measured by a main pump rotating speed measuring device. The rotating speed frame is connected with the output end of the main pump rotating speed measuring device, is mainly used for detecting and displaying a main pump rotating speed signal, and meanwhile processes the main pump rotating speed signal, and outputs a logic signal with low rotating speed and low rotating speed, a current analog signal of 40mA-20mA, a display signal and the like. The output signal of the rotating speed frame is used for protecting the reactor.
In the actual use process, when the rotating speed signal of the main pump is monitored and processed through the rotating speed rack, the abnormal rotating speed phenomenon can occur due to equipment failure. For such occasional failures of the rotational speed abnormality, it is necessary to diagnose whether the cause of the failure is the rotational speed abnormality due to the main pump rotational speed detection system or the rotational speed abnormality due to the rotational speed frame.
Therefore, a fault diagnosis system needs to be designed to solve this problem.
Disclosure of Invention
In view of the above, it is desirable to provide a fault diagnosis system, a rotational speed frame having a fault diagnosis function, and a monitoring system.
A fault diagnosis system comprising:
the signal switching device is used for switching the rotating speed signal input by the rotating speed signal input end into two paths of rotating speed signals and outputting the two paths of rotating speed signals through the first rotating speed signal output end and the second rotating speed signal output end;
the fault diagnosis device is used for receiving the rotating speed signal input by the original signal input end and a rack signal input by the rack signal input end and diagnosing fault equipment causing abnormal rotating speed according to the rotating speed signal and the rack signal, wherein the fault equipment comprises at least one of a main pump rotating speed detection system and a rotating speed rack, and the rack signal refers to a signal output after the rotating speed signal is processed by the rotating speed rack.
In one embodiment, the failure diagnosis apparatus includes:
and the first diagnosis processing mechanism is electrically connected with the original signal input end and used for comparing the rotating speed signal with a first preset threshold value and judging whether the fault equipment causing abnormal rotating speed is the main pump rotating speed detection system or not.
In one embodiment, the failure diagnosis apparatus includes:
and the second diagnosis processing mechanism is electrically connected with the rack signal input end and used for comparing the rack signal with a second preset threshold value and judging whether the fault equipment causing the abnormal rotating speed is the rotating speed rack or not.
In one embodiment, the failure diagnosis apparatus includes:
the rack signal conversion mechanism is electrically connected with the rack signal input end and is used for converting the rack signal;
and the third diagnosis processing mechanism is electrically connected with the rack signal conversion mechanism and used for comparing the signal converted by the rack signal conversion mechanism with the rotating speed signal and judging whether the fault equipment causing the abnormal rotating speed is the rotating speed rack or not.
In one embodiment, the second rotational speed signal output is connected to an input of the rotational speed rack, and the rack signal input is electrically connected to an output of the rotational speed rack.
In one embodiment, the second rotational speed signal output end is connected to an input end of the rotational speed rack, the signal switching device further includes a rack signal switching end and a rack signal switching end, the rack signal switching end is electrically connected to an output end of the rotational speed rack, the rack signal switching end is electrically connected to the rack signal input end of the fault diagnosis device, and the signal switching device is further configured to switch the rack signal output by the rotational speed rack to the fault diagnosis device.
In one embodiment, the fault diagnosis device is a recorder.
In one embodiment, the rack signal includes a rotation speed logic signal, the rack signal output terminal includes a logic signal output terminal, and the signal switching apparatus further includes:
and the logic signal processing mechanism is electrically connected with the rack signal input end and the logic signal output end, and is used for processing the rotating speed logic signal in the rack signal and transmitting the rotating speed logic signal to the logic signal output end.
In one embodiment, the logic signal processing mechanism includes an ac/dc conversion module electrically connected to the rack signal input terminal and the logic signal output terminal, and configured to convert the rotation speed logic signal into a logic voltage signal.
In one embodiment, the rack signal includes a rotational speed analog signal, and the signal switching device further includes:
and the analog signal processing mechanism is electrically connected with the frame signal input end and the analog signal output end and is used for processing the rotating speed analog signal in the frame signal and transmitting the rotating speed analog signal to the analog signal output end.
In one embodiment, the analog signal processing mechanism includes a conversion resistor electrically connected to the rack signal input terminal and the analog signal output terminal, and configured to convert the rotation speed analog signal in the rack signal into an analog voltage signal.
In one embodiment, the resistance value of the conversion resistor is 250 Ω.
In one embodiment, the rack signal includes a rotational speed display signal, and the signal switching device further includes:
and the display mechanism is electrically connected with the signal transfer-in end of the rack and is used for displaying according to the rotating speed display signal.
In one embodiment, the signal transfer apparatus further includes:
and the remote testing mechanism is electrically connected with the rotating speed rack and is used for inputting a test signal to the rotating speed rack and receiving a processing result of the test signal output by the rotating speed rack so as to test and verify the function of the rotating speed rack.
In one embodiment, the remote testing mechanism comprises at least one of a panel display testing component, a low-speed signal testing component and a low-speed signal testing component, and the panel display testing component, the low-speed signal testing component and the low-speed signal testing component are all electrically connected with the rotating speed frame;
the panel display testing component is used for inputting a rotating speed display testing signal to the rotating speed rack and receiving the rotating speed display signal output after the rotating speed rack is processed so as to verify the display function of the rotating speed rack;
the rotating speed low signal testing component is used for inputting a rotating speed low testing signal to the rotating speed rack and receiving a rotating speed low signal triggering signal output after the rotating speed rack is processed so as to verify the processing function of the rotating speed rack on the rotating speed low signal;
the rotating speed low-low signal testing component is used for inputting a rotating speed low-low testing signal to the rotating speed rack and receiving a rotating speed low-low signal triggering signal output after the rotating speed rack is processed so as to verify the processing function of the rotating speed rack on the rotating speed low-low signal.
The fault diagnosis system provided by the embodiment of the application comprises the signal switching device and the fault diagnosis device. The fault diagnosis device includes the raw signal input and the rack signal input. The original signal input end is electrically connected with the first rotating speed signal output end of the signal switching device. The rack signal input end receives the rack signal obtained by the rotating speed rack processing. The fault diagnosis device processes the rotating speed signal and the rack signal, and can diagnose fault equipment causing abnormal rotating speed. The embodiment of the application provides fault diagnosis system can be fast effectual fix a position out and lead to the unusual faulty equipment of rotational speed be main pump rotational speed detecting system still rotational speed frame provides effective basis for subsequent maintenance and processing to guarantee reliable and stable to monitor and handle the main pump rotational speed. Meanwhile, the signal switching device realizes effective switching of the rotating speed signals, is convenient to carry out multiple processing on the rotating speed signals, reduces wiring and improves equipment integration level.
A rotational speed frame with fault diagnosis functionality, comprising:
the fault diagnosis system as described above;
the input end of the rotating speed frame is electrically connected with the second rotating speed signal output end, and the output end of the rotating speed frame is electrically connected with the frame signal input end.
The rotational speed frame with fault diagnosis function that this application embodiment provided not only can pass through the monitoring and the conversion treatment of main pump rotational speed are realized to the rotational speed frame, moreover when the rotational speed is unusual, through fault diagnosis device can be quick effectual the diagnosis result in rotational speed unusual fault equipment be main pump rotational speed detecting system still the rotational speed frame.
A main pump rotational speed monitoring system with a fault diagnosis function includes:
the rotating speed frame with the fault diagnosis function;
the output end of the main pump rotating speed detection system is electrically connected with the rotating speed signal input end and used for detecting a rotating speed signal of the main pump.
In this embodiment, the main pump rotational speed monitoring system with the fault diagnosis function can detect and process a main pump rotational speed signal, and meanwhile, when the rotational speed of the main pump rotational speed monitoring system with the fault diagnosis function is abnormal, whether a fault device causing the abnormal rotational speed is the main pump rotational speed monitoring system or the rotational speed rack can be quickly and effectively diagnosed through the fault diagnosis device. In addition, the main pump rotational speed monitoring system with fault diagnosis function that this application embodiment provided passes through signal switching device will rotational speed signal connects to fault diagnosis device with the rotational speed frame effectively reduces rotational speed detection device's setting to reduce the line, improved the integrated level of equipment, reduced the volume of equipment.
Drawings
FIG. 1 is a schematic diagram illustrating a system for detecting a rotational speed of a main pump according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram and a signal transmission diagram of a rotational speed rack according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a fault diagnosis system according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a signal transfer device according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a fault diagnosis device according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a fault diagnosis provided by an embodiment of the present application;
FIG. 7 is a schematic diagram of the structure and connections of a fault diagnosis system according to an embodiment of the present application;
FIG. 8 is a schematic diagram illustrating the structure and connections of a fault diagnosis system according to an embodiment of the present application;
FIG. 9 is a circuit diagram of a logic signal processing mechanism provided in one embodiment of the present application;
FIG. 10 is a circuit diagram of an analog signal processing mechanism and a display mechanism provided in one embodiment of the present application;
fig. 11 is a schematic view of a front panel of a signal adapter according to an embodiment of the present application;
FIG. 12 is a schematic diagram of a rear panel of a signal adapter according to an embodiment of the present application;
FIG. 13 is a schematic diagram of a signal adapter panel with a remote test mechanism according to an embodiment of the present application;
fig. 14 is a schematic structural diagram of a rotational speed rack with a fault diagnosis function and a rotational speed monitoring system of a main pump with a fault diagnosis function according to an embodiment of the present disclosure.
Description of the reference numerals
Rotating speed frame 1 with fault diagnosis function
First rotational speed signal output terminal 120
Second rotational speed signal output terminal 130
Rack signal transfer terminal 140
Rack signal output terminal 150
Logic signal output terminal 151
Analog signal output terminal 152
Logic signal processing mechanism 160
AC-DC conversion module 161
Analog signal processing means 170
First diagnostic processing means 230
Second diagnostic processing means 240
Rack signal conversion mechanism 250
Third diagnostic processing means 260
Main pump rotational speed detecting system 20
Main probe signal receiving module 31
Spare probe signal receiving module 32
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below by way of embodiments and with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
One embodiment of the present application provides a fault diagnosis system 10. The fault diagnosis system 10 is used in the process of detecting the rotating speed of the main pump of the pressurized water reactor nuclear power station, when the abnormal rotating speed is detected, the equipment causing the abnormality is diagnosed, and whether the equipment causing the abnormal rotating speed is the main pump rotating speed detection system 20 or the rotating speed rack 30 is determined. The monitoring of the main pump rotation speed may be achieved by the main pump rotation speed detection system 20. The specific structure of the main pump rotating speed detection system 20 is not limited in the present application, and can be selected according to actual requirements as long as the detection of the main pump rotating speed can be realized.
Referring to fig. 1, in one embodiment, the main pump speed detection system 20 may include a speed probe 21 and a speed probe 22. The tachometer probe 22 may be a variable reluctance sensor (also known as a self-inductance sensor). The speed probe 21 is mounted on the main pump shaft 40 of the main pump. The revolution speed probe 21 rotates in accordance with the rotation of the main pump rotary shaft 40. The rotating speed probe 21 passes through the rotating speed probe 22 once every time the rotating speed probe rotates once, and the rotating speed probe 22 forms a section of spike pulse. As the rotation speed of the rotation speed probe 21 increases, the induced electromotive force increases, and the period of the waveform formed by the rotation speed probe 22 also becomes shorter. That is, the amplitude and frequency of the output signal of the speed probe 22 vary with the main pump speed. In the detection of the main pump rotation speed, one main pump rotation speed detection system 20 may be provided, or a plurality of main pump rotation speed detection systems 20 may be provided. In one embodiment, the number of the main pump speed detection systems 20 is 2. For simplicity, 2 of the main pump speed detection systems 20 are referred to as a main probe and a backup probe, respectively.
Referring to fig. 2, in one embodiment, the tachometer housing 30 includes a primary probe signal receiving module 31, a backup probe signal receiving module 32, a selection module 33, and a processing module 34. The main probe signal receiving module 31 is configured to receive a rotation speed detection signal output by the main probe. The spare probe signal receiving module 32 is configured to receive a rotation speed detection signal output by the spare probe. The input end of the selection module 33 is connected to the main probe signal receiving module 31 and the backup probe signal receiving module 32, respectively. The output of the selection module 33 is connected to the processing module 34.
The selection module is used for selecting and controlling the connection of the main probe signal receiving module 31 and/or the standby probe signal receiving module 32 with the processing module. The processing module 34 is configured to process the rotation speed signal transmitted by the main probe signal receiving module 31 or the spare probe signal receiving module 32, and output a rotation speed logic signal of a rotation speed low signal or a rotation speed low signal, a 4mA-20mA current rotation speed analog signal, and a rotation speed display signal. The rotating speed low signal, the 4mA-20mA current signal and the display signal can be used for protecting the reactor.
Referring to fig. 3, in one embodiment, a fault diagnosis system 10 is provided, which includes a signal transfer device 100 and a fault diagnosis device 200.
The signal adapter 100 includes a rotational speed signal input terminal 110, a first rotational speed signal output terminal 120, and a second rotational speed signal output terminal 130. The fault diagnosis device 200 includes a raw signal input 210 and a rack signal input 220.
The rotational speed signal input terminal 110 is electrically connected with an output terminal of the main pump rotational speed detection system 20. The first rotational speed signal output terminal 120 is electrically connected to the original signal input terminal 210. The housing signal input 220 is configured to receive the signal processed by the rotational speed housing 30. The signal processed by the rotating speed rack 30 is defined as a rack signal.
The signal switching device 100 is configured to convert the rotation speed signal input by the rotation speed signal input terminal 110 into two rotation speed signals, and output the two rotation speed signals through the first rotation speed signal output terminal 120 and the second rotation speed signal output terminal 130, respectively. The signal adapting device 100 can implement signal adapting through a signal adapting board, a cable connecting wire or a signal adapter, etc. The rotating speed signal refers to a signal parameter representing the rotating speed of the main pump. It is understood that the rotation speed signal can be a voltage value, a rotation speed value or a frequency value according to requirements.
The rotation speed signal output by the first rotation speed signal output terminal 120 is transmitted to the fault diagnosis device 200. The raw signal input 210 of the fault diagnosis device 200 receives the rotation speed signal. The fault diagnosis device 200 is used for diagnosing fault equipment causing abnormal rotating speed according to the rotating speed signal and the rack signal. The fault device includes at least one of the main pump speed detection system 20 and the speed frame 30. The fault diagnosis device 200 may include a storage module and a processing module. The storage module is used for storing the received rotating speed signal, the received rack signal and the like. The processing module is used for processing the rotating speed signal and the rack signal. The processing module can realize the processing of the rotating speed signal and the rack signal through a hardware circuit, and can also realize the processing of the original rotating speed signal and the rack signal through a chip or a processor and a software program. The fault diagnosis apparatus 200 may be implemented by a separately designed hardware device and a software program, or by setting a software program for a computer device, a recorder, an upper computer, or a Programmable Logic Controller (PLC). The present application is not limited to this, as long as the functions thereof can be realized.
The principle of the failure diagnosis apparatus 200 diagnosing the failure device causing the abnormal rotation speed based on the rotation speed signal and the rack signal is as follows:
when the abnormal rotating speed is monitored, the fault diagnosis device 200 compares the received rotating speed signal with a pre-stored first preset threshold value, and determines whether the fault is caused by the main pump rotating speed detection system 20. The first preset threshold may be a pre-stored rotation speed value of the main pump rotation speed detection system 20 during normal operation. The failure diagnosis device 200 may compare the received rotation speed signal with the rotation speed signal stored in history, and determine whether the failure is caused by the main pump rotation speed detection system 20.
Meanwhile, the fault diagnosis device 200 may also compare the received rotation speed signal with a second preset threshold value, and determine whether the rotation speed signal is a fault caused by the rotation speed rack 30. The second preset threshold may be a rotation speed value of the rotation speed rack 30 during normal operation, which is pre-stored. The failure diagnosis device 200 may compare the received rack signal with the rack signal stored in history, and determine whether the rack signal is a failure caused by the rotation speed rack 30.
In addition, the fault diagnosis device 200 may also compare the form of converting the received rack signal into the rotation speed signal with the rotation speed signal received by the original signal input end 210, determine whether the rotation speed rack 30 works normally, and if the rotation speed rack 30 works normally, it indicates that the faulty device is the main pump rotation speed detection system 20.
It should be noted that, the above are only several embodiments of the fault diagnosis device 200 for diagnosing the fault equipment according to the rotation speed signal and the rack signal, and no limitation is made to the structure and function of the fault diagnosis device 200.
In this embodiment, the fault diagnosis system 10 includes the signal relay apparatus 100 and the fault diagnosis apparatus 200. The fault diagnosis device 200 includes the raw signal input 210 and the rack signal input 220. The original signal input terminal 210 is electrically connected to the first rotational speed signal output terminal 120 of the signal adapter 100. The rack signal input 220 receives the rack signal processed by the rotational speed rack 30. The failure diagnosis apparatus 200 processes the rotational speed signal and the rack signal, and can diagnose a failure device causing an abnormal rotational speed. The fault diagnosis system 10 provided by this embodiment can quickly and effectively locate whether the fault equipment causing the abnormal rotating speed is the main pump rotating speed detection system 20 or the rotating speed rack 30, so as to provide an effective basis for subsequent maintenance and processing, thereby ensuring stable and reliable monitoring and processing of the rotating speed of the main pump. Meanwhile, the signal switching device 100 realizes effective switching of the rotating speed signal, is convenient for performing multiple processing on the rotating speed signal, reduces wiring and improves equipment integration level.
Referring to fig. 4, in an embodiment, the signal transfer apparatus 100 may transfer the rotation speed signal through a cable and a connection interface. It will be appreciated that the signal transfer device 100 may also include 2 sets of cables and connection interfaces as shown in fig. 4 to enable the transfer of 2-way signals to the primary and back-up probes. Through the signal switching device 100, effective switching of the rotating speed signals can be realized, multiple paths of rotating speed signals can be obtained through one set of the main pump rotating speed detection system 20, and the rotating speed signals can be conveniently and subsequently processed in multiple ways. The fault diagnosis system 10 provided by the embodiment reduces equipment investment and equipment connection lines, and improves equipment integration level.
Referring to fig. 5 and 6, in one embodiment, the fault diagnosis apparatus 200 includes a first diagnosis processing unit 230. The first diagnostic processing means 230 is electrically connected to the raw signal input 210. The first diagnosis processing means 230 is configured to compare the rotation speed signal with the first preset threshold value, so as to determine whether the faulty equipment causing the abnormal rotation speed is the main pump rotation speed detection system 20. The first diagnostic processing means 230 may be a circuit unit, or may be a processing chip including a computer program, or the like. It is understood that the first preset threshold may be set to a certain error range, and the first preset threshold may be a numerical range. When the rotating speed signal falls within the first preset threshold range, it indicates that the rotating speed signal detected by the main pump rotating speed detecting system 20 is normal, and the faulty equipment causing abnormal rotating speed is not the main pump rotating speed detecting system 20; otherwise, the main pump rotational speed detection system 20 is a malfunctioning device.
In one embodiment, the fault diagnosis apparatus 200 may further include a second diagnosis processing means 240. The second diagnostic processing means 240 is electrically connected to the rack signal input 220. The second diagnosing and processing unit 240 is configured to compare the rack signal with the second preset threshold, and determine whether a faulty device causing the abnormal rotating speed is the rotating speed rack 30. The second diagnosis processing means 240 may be a circuit unit, or may be a processing chip including a computer program, or the like. It is understood that the second preset threshold may be set to a certain error range, and the second preset threshold may be a numerical range. When the rack signal falls within the second preset threshold range, it indicates that the rotating speed rack 30 processes the rotating speed signal normally, and the fault equipment causing the abnormal rotating speed is not the rotating speed rack 30; otherwise, the rotating speed frame 30 is a faulty device.
In one embodiment, the fault diagnosis apparatus 200 further includes a rack signal conversion mechanism 250 and a third diagnostic processing mechanism 260. The rack signal conversion mechanism 250 is electrically connected to the rack signal input 220. The third diagnostic processing means 260 is electrically connected to the rack signal conversion means 250. The rack signal conversion mechanism 250 is used for converting the rack signal into a rotating speed signal form. For example, the frame signal conversion mechanism 250 converts the rotation speed logic signal of the rotation speed low signal and the rotation speed low signal into a form of a rotation speed signal. The third diagnosing and processing unit 260 is configured to compare the signal converted by the rack signal converting unit with the rotation speed signal received by the original signal input end 210, and determine whether a faulty device causing a rotation speed abnormality is the rotation speed rack 30. When the signal converted by the rack signal conversion mechanism is consistent with the rotating speed signal received by the original signal input end 210, it indicates that the rotating speed rack 30 processes the rotating speed signal normally, and the fault equipment causing abnormal rotating speed is not the rotating speed rack 30; otherwise, the rotating speed frame 30 is a faulty device.
Referring to fig. 7, in one embodiment, the second speed signal output terminal 130 is connected to an input terminal of the speed frame 30. The housing signal input 220 is electrically connected to the output of the rotational speed housing 30. The signal switching device 100 switches the rotation speed signal into two paths of rotation speed signals to be output. One input is input to the fault diagnosis device 200, and the other input is input to the rotational speed frame 30. The rotational speed rack 30 processes the rotational speed signal and outputs the processed rotational speed signal to the fault diagnosis device 200. In this embodiment, both the input end and the output end of the rotational speed rack 30 may be directly connected to the fault diagnosis system 10, so that the number of connecting wires is reduced, and the equipment integration level is improved.
Referring to fig. 8, in one embodiment, the second speed signal output terminal 130 is connected to an input terminal of the speed frame 30. The signal relay device 100 further includes a rack signal relay-in terminal 140 and a rack signal relay-out terminal 150. The rack signal input end 140 is electrically connected to the output end of the rotational speed rack 30. The rack signal output terminal 150 is electrically connected to the rack signal input terminal of the fault diagnosis apparatus 200. The signal switching device 100 is also used for switching the rack signal to the fault diagnosis device 200.
The signal switching device 100 switches the rotation speed signal into two paths of rotation speed signals to be output. One input is input to the fault diagnosis device 200, and the other input is input to the rotational speed frame 30. The rotation speed rack 30 processes the rotation speed signal and transmits the output switching signal to the signal switching device 100. The signal switching device 100 further switches the rack signal to the fault diagnosis device 200 for processing. The signal switching device 100 can switch the rack signal through a cable and an adapter. In this embodiment, the signal adapter 100 is used to transfer the rack signal output by the rotating speed rack 30 to the fault diagnosis device 200, so that the number of connections of the fault diagnosis device 200 can be reduced, an input interface matched with the output end of the rotating speed rack 30 does not need to be separately provided for the fault diagnosis device 200, and the universality and the practicability of the fault diagnosis device 200 are enhanced.
In one embodiment, the fault diagnosis device 200 is a recorder. The type, structure and the like of the recorder are not limited and can be selected according to actual requirements. Through the recorder, not only can the function of fault equipment diagnosis be realized, but also the real-time monitoring, recording, displaying and the like of the rotating speed signal can be realized, and the practicability of the fault diagnosis system 10 is further enhanced.
As in the previous embodiment, the rack signal includes the rotational speed logic signal, the rotational speed analog signal, and the rotational speed display signal. The speed logic signal comprises a speed low signal and a speed low signal. The rotating speed analog signal is a 4mA-20mA current signal.
In one embodiment, the rack signal output terminal 150 includes a logic signal output terminal 151 and an analog signal output terminal 152. The corresponding rack signal inputs 220 include logic signal inputs and analog signal outputs. In one embodiment, the interfaces of the logic signal output terminal 151 and the analog signal output terminal 152 are general interfaces for communication of a computer device, a recorder, an upper computer or a PLC, so as to facilitate connection with the reliability monitoring device 200, thereby improving the universality and the practicability.
The signal relay device 100 further comprises a logic signal processing mechanism 160. An input terminal of the logic signal processing mechanism 160 is electrically connected to the rack signal input terminal 140. The output terminal of the logic signal processing unit 160 is electrically connected to the logic signal output terminal 151. The logic signal processing mechanism 160 is configured to convert the rotation speed logic signal in the rack signal, output the rotation speed logic signal to the logic signal output terminal 151, and further output the rotation speed logic signal to the fault diagnosis device 200. The logic signal processing unit 160 can design and select different circuits according to different signal requirements of the logic signal output terminal 151. In this embodiment, the logic signal processing mechanism 160 converts the rotation speed logic signal in the rack signal to meet the requirements of different forms of the rotation speed logic signal, so as to increase the versatility of the signal switching device 100.
Referring to fig. 9, in one embodiment, the logic signal processing mechanism 160 includes an AC/DC conversion module 161. The ac-dc conversion module 161 is electrically connected to the rack signal input terminal 140 and the logic signal output terminal 151. The ac-dc conversion module 161 receives the rack signal and converts the rotation speed logic signal in the rack signal into a logic voltage signal. The type of the ac-dc conversion module 161 can be selected according to actual requirements. As shown in fig. 9, the ac/dc conversion module 161 may further connect diodes D1 and D2, an indicator light, load resistors R1 and R2, a power supply fuse FU, a power supply switch SH, and the like. The logic signal processing mechanism 160 is configured to convert 220V ac power into 5.1V dc voltage, convert the rotation speed logic signal into a logic voltage signal, and output the logic voltage signal to the fault diagnosis device 200 through the logic signal output terminal 151. When the low-speed, low-speed signal in the rack signal triggers, the loop of the logic signal processing mechanism 160 is closed. The logic signal processing mechanism 160 converts the 220V ac power into a 5.1V dc voltage, and converts the rotation speed logic signal into the logic voltage signal. The fault diagnosis device 200 can detect a change in voltage of 5.1VDC through the logic signal transfer terminal 151. By monitoring the output voltage of the logic signal output terminal 151, it is determined whether the rotation speed is low or not and whether the rotation speed low signal is normally triggered or not. In this embodiment, the ac/dc conversion module 161 and the peripheral circuit are used to convert the rotation speed logic signal in the rack signal into a logic voltage signal, so as to facilitate further detection and diagnosis of the fault diagnosis device 200.
Referring to fig. 10, in one embodiment, the signal adapter 100 further includes an analog signal processing mechanism 170. The analog signal processing mechanism 170 is electrically connected to the rack signal input terminal 140 and the analog signal output terminal 152. The analog signal processing mechanism 170 is configured to process the rotation speed analog signal in the rack signal, output the rotation speed analog signal to the analog signal output end 152, and further output the rotation speed analog signal to the fault diagnosis device 200. The analog signal processing unit 170 may be designed and selected according to different signal requirements of the analog signal output terminal 152. In this embodiment, the analog signal processing mechanism 170 converts the rotating speed analog signal in the rack signal to meet the requirements of different forms of rotating speed analog signals, so as to increase the versatility of the signal switching device 100.
In one embodiment, the analog signal processing mechanism 170 includes a transfer resistor 171. The converting resistor 171 is electrically connected to the rack signal input terminal 140 and the analog signal output terminal 152. The converting resistor 171 is configured to convert the rotation speed analog signal in the rack signal into an analog voltage signal. That is, the converting resistor 171 converts the 4mA to 20mA current signal into the analog voltage signal, and further transmits it to the fault diagnosing apparatus 200. Meanwhile, the analog signal processing mechanism 170 may be further provided with a switch SH. In a specific embodiment, the converting resistor 171 is a 250 Ω precision resistor, so as to convert a 4mA-20mA current signal into a 1V-5VDC analog voltage signal for transmission to the fault diagnosis device 200, thereby facilitating detection and diagnosis of the fault diagnosis device 200.
With continued reference to fig. 10, in one embodiment, the signal transfer device 100 further includes a display mechanism 180. The display mechanism 180 is electrically connected to the rack signal input terminal 140. The display mechanism 180 is configured to display according to the rotation speed display signal. The display mechanism 180 may be a nixie tube, or may be an LED display screen or other device capable of displaying data. The display mechanism 180 displays the rotating speed of the main pump, so that workers can conveniently check and monitor the rotating speed.
Referring to fig. 11, in one embodiment, the front panel of the signal adapter 100 is shown in fig. 11. The front panel of the signal adapter 100 may be provided with a power indicator 101, a nixie tube 102, a channel selection switch 103, a USB interface 104, the first rotational speed signal output end 120, the second rotational speed signal output end 130, the logic signal output end 151, and the analog signal output end 152. The first rotation speed signal output end 120 includes 2 interfaces, which are a rotation speed signal output port of the main probe and a rotation speed signal output port of the backup probe, respectively. The second rotation speed signal output end 130 includes 2 interfaces, which are the rotation speed signal output port of the main probe and the rotation speed signal output port of the backup probe, respectively. The power indicator 101 is used to indicate the power supply status of the signal adapter 100. The USB interface 104 is used to connect with the signal adapter 100, so as to facilitate data import or export. The channel selection switch 103 is used for selectively switching on the main probe or the backup probe.
Referring to fig. 12, in one embodiment, the back panel of the signal adapter 100 is shown in fig. 12. The rear panel of the signal adapter device 100 may be provided with a power interface 105, a power switch 106, the rotational speed signal input terminal 110, and the rack signal adapter terminal 140. The rotation speed signal input end 110 may include 2 interfaces, which are an input port of the rotation speed signal of the main probe and an input port of the rotation speed signal of the backup probe, respectively. The rack signal ingress port 140 may include 2 interfaces, namely a rack signal ingress port of the main probe and a rack signal ingress port of the backup probe.
In one embodiment, the rotational speed signal input terminal 110, the first rotational speed signal output terminal 120, the second rotational speed signal output terminal 130, the rack signal input terminal 140, the rack signal output terminal 150, the logic signal output terminal 151, the analog signal output terminal 152, the raw signal input terminal 210 and the rack signal input terminal 220 all adopt standard interfaces, so as to facilitate connection with a probe cable, a rotational speed rack, a recorder and the like. The present embodiment provides the fault diagnosis system 10 with improved practicality and versatility.
In one embodiment, the signal relay device 100 further comprises a remote testing mechanism. The remote testing mechanism is electrically connected to the speed frame 30. The remote testing mechanism is configured to input a test signal to the rotational speed rack 30, and receive a processing result of the test signal output by the rotational speed rack 30, so as to test and verify a function of the rotational speed rack 30. The remote test mechanism may include circuitry that generates a corresponding test signal, i.e., test signal generation circuitry. The panel of the housing of the signal adapter 100 may be correspondingly provided with a switch or a button for controlling the test signal generating circuit. The output end of the test signal generating circuit is electrically connected with the rotating speed rack 30, and outputs the corresponding test signal to the rotating speed rack 30. The module corresponding to the rotating speed rack 30 processes the test signal and outputs and feeds back the processed result to the remote testing mechanism. The remote testing mechanism may be electrically connected to the display mechanism 180, and a corresponding indicator light may be correspondingly disposed on a housing panel of the signal adapter 100 to display a processing result fed back by the rotating speed rack 30. When a user needs to remotely test and verify the function of the rotating speed rack 30, the test signal generating circuit can generate a corresponding test signal by turning on a switch or a key of the test signal generating circuit. Then, the user obtains a processing result of the test signal by observing the indicator light on the panel of the housing of the signal transfer device 100 or the result of the display mechanism 180, and determines whether the function of the rotating speed rack 30 is normal according to the processing result.
In this embodiment, the remote testing mechanism is used to implement remote testing and verification of the rotating speed rack 30, further verify and determine the function and stability of the rotating speed rack 30, and improve the accuracy of fault diagnosis of the rotating speed rack 30. Meanwhile, the remote testing mechanism is arranged on the signal switching device 100, so that remote testing verification is realized, and the operation is simple and convenient.
Referring to fig. 13, in one embodiment, the remote testing mechanism includes at least one of a panel display testing assembly, a low speed signal testing assembly and a low speed signal testing assembly. The panel display testing assembly, the rotating speed low signal testing assembly and the rotating speed low signal testing assembly are all electrically connected with the rotating speed rack 30.
The output of the panel test assembly is connected to the input of the panel processing circuit of the speed frame 30. The panel testing component is used for generating a rotating speed display testing signal and inputting the rotating speed display testing signal to the panel processing circuit of the rotating speed rack 30. The panel processing circuit of the rotational speed rack 30 processes the rotational speed display test signal and outputs the rotational speed display signal to the panel test assembly. The panel test assembly may be electrically connected to the display mechanism 180. The panel testing component further transmits the rotation speed display signal to the display mechanism 180 for display. The user verifies whether the display function of the rotating speed rack 30 is normal according to the signal output by the display mechanism 180. In this embodiment, the panel display test module realizes remote test of the panel display function of the rotating speed rack 20, and improves the accuracy of panel processing and display function fault diagnosis of the rotating speed rack 30.
The output end of the rotating speed low signal testing component is connected with the input end of the rotating speed low signal processing circuit of the rotating speed rack 30. The rotational speed low signal test component is configured to input a rotational speed low test signal, i.e., a load shedding threshold test signal, to the rotational speed rack 30. The low-speed signal processing circuit of the speed frame 30 processes the low-speed test signal and feeds a low-speed signal trigger signal back to the low-speed signal test component. The panel of the signal conversion apparatus 100 may be provided with an indicator light for indicating whether the test state and the test result are normal. And if the user controls the rotating speed low signal testing assembly to perform rotating speed low signal testing through a switch or a key, the testing indicator lamp is turned on. When the rotating speed low signal trigger signal fed back by the rotating speed frame 30 is normal, the corresponding normal indicator light is on. When the rotating speed low signal trigger signal fed back by the rotating speed frame 30 is abnormal, the corresponding load shedding alarm lamp is turned on. In this embodiment, the rotational speed low signal testing component is used to remotely test and verify the processing function of the rotational speed low signal of the rotational speed rack 30, so as to improve the accuracy of the functional fault diagnosis of the rotational speed low signal processing circuit of the rotational speed rack 30.
The output end of the rotating speed low-low signal testing component is connected with the input end of the rotating speed low-low signal processing circuit of the rotating speed rack 30. The rotational speed low-low signal testing component is used for inputting a rotational speed low-low testing signal, namely a trip threshold testing signal, to the rotational speed rack 30. The low-speed signal processing circuit of the speed frame 30 processes the low-speed test signal and feeds a low-speed signal trigger signal back to the low-speed signal test component. The panel of the signal conversion apparatus 100 may be provided with an indicator light for indicating whether the test state and the test result are normal. And if the user controls the rotating speed low-signal testing assembly to perform rotating speed low-signal testing through a switch or a key, the testing indicator lamp is turned on. When the rotating speed low signal trigger signal fed back by the rotating speed frame 30 is normal, the corresponding normal indicator light is on. When the rotating speed low signal trigger signal fed back by the rotating speed frame 30 is abnormal, the corresponding load shedding alarm lamp is turned on. In this embodiment, the rotational speed low-low signal testing component is used to remotely test and verify the processing function of the rotational speed low-low signal of the rotational speed rack 30, so as to improve the accuracy of the functional fault diagnosis of the rotational speed low-low signal processing circuit of the rotational speed rack 30.
Referring to fig. 14, an embodiment of the present application provides a tachometer housing 1 having a fault diagnosis function. The rotational speed rack 1 with the fault diagnosis function comprises the fault diagnosis system 10 and the rotational speed rack 30. The input end of the rotational speed rack 30 is electrically connected to the second rotational speed signal output end 130 of the signal adapter 100. The output of the tachometer housing 30 is electrically connected to the housing signal input 220 of the fault diagnostic device 200. The speed frame 1 with the fault diagnosis function provided by the embodiment not only can realize monitoring and conversion processing of the rotating speed of the main pump through the speed frame 30, but also can quickly and effectively diagnose whether a fault device causing the rotating speed abnormality is the main pump rotating speed detection system 20 or the speed frame 30 through the fault diagnosis device 200 when the rotating speed is abnormal.
With continued reference to fig. 14, an embodiment of the present application provides a main pump rotational speed monitoring system with fault diagnosis function, which includes the rotational speed frame 1 with fault diagnosis function and the main pump rotational speed detection system 20. The output end of the main pump rotating speed detecting system 20 is electrically connected with the rotating speed signal input end 110 of the signal conversion device 100. The main pump rotating speed detection system 20 is used for detecting a rotating speed signal of a main pump. The specific structure and implementation principle of the main pump detection system 20 are referred to the above embodiments, and are not described in detail herein. In this embodiment, the system for monitoring the rotating speed of the main pump with the fault diagnosis function can detect and process the rotating speed signal of the main pump, and meanwhile, when the rotating speed of the system for monitoring the rotating speed of the main pump with the fault diagnosis function is abnormal, whether the fault equipment causing the abnormal rotating speed is the system for detecting the rotating speed of the main pump 20 or the rotating speed rack 30 can be quickly and effectively diagnosed through the fault diagnosis device 200. In addition, the main pump rotational speed monitoring system with fault diagnosis function provided in this embodiment transfers the rotational speed signal to the fault diagnosis device 200 through the signal transfer device 100 to connect with the rotational speed rack 30, so as to effectively reduce the setting of the rotational speed detection device, reduce the number of connecting wires, improve the integration level of the equipment, and reduce the volume of the equipment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (15)
1. A fault diagnosis system, comprising:
the signal switching device (100) comprises a rotating speed signal input end (110), a first rotating speed signal output end (120) and a second rotating speed signal output end (130), wherein the rotating speed signal input end (110) is electrically connected with the output end of the main pump rotating speed detection system (20), and the signal switching device (100) is used for switching the rotating speed signal input by the rotating speed signal input end (110) into two paths of rotating speed signals and outputting the two paths of rotating speed signals through the first rotating speed signal output end (120) and the second rotating speed signal output end (130);
the fault diagnosis device (200) comprises an original signal input end (210) and a rack signal input end (220), wherein the original signal input end (210) is electrically connected with the first rotating speed signal output end (120), the fault diagnosis device (200) is used for receiving the rotating speed signal input by the original signal input end (210) and a rack signal input by the rack signal input end (220) and diagnosing fault equipment causing abnormal rotating speed according to the rotating speed signal and the rack signal, the fault equipment comprises at least one of a main pump rotating speed detection system (20) and a rotating speed rack (30), and the rack signal refers to a signal output after the rotating speed signal is processed by the rotating speed rack (30);
wherein the failure diagnosis device (200) includes:
the first diagnosis processing mechanism (230) is electrically connected with the original signal input end (210) and is used for comparing the rotating speed signal with a first preset threshold value and judging whether a fault device causing abnormal rotating speed is the main pump rotating speed detection system (20) or not;
and the second diagnosis processing mechanism (240) is electrically connected with the rack signal input end (220) and is used for comparing the rack signal with a second preset threshold value and judging whether the fault equipment causing the abnormal rotating speed is the rotating speed rack (30).
2. The fault diagnosis system according to claim 1, wherein the fault diagnosis device (200) comprises:
a rack signal conversion mechanism (250) electrically connected to the rack signal input (220) for converting the rack signal;
and the third diagnosis processing mechanism (260) is electrically connected with the rack signal conversion mechanism (250) and is used for comparing the signal converted by the rack signal conversion mechanism (250) with the rotating speed signal and judging whether the fault equipment causing the rotating speed abnormity is the rotating speed rack (30).
3. The fault diagnosis system according to claim 1, characterized in that the second rotational speed signal output (130) is connected to an input of the rotational speed rack (30), and the rack signal input (220) is electrically connected to an output of the rotational speed rack (30).
4. The fault diagnosis system of claim 1, wherein the second rotational speed signal output terminal (130) is connected to an input terminal of the rotational speed rack (30), the signal transfer device (100) further comprises a rack signal transfer terminal (140) and a rack signal transfer terminal (150), the rack signal transfer terminal (140) is electrically connected to an output terminal of the rotational speed rack (30), the rack signal transfer terminal (150) is electrically connected to the rack signal input terminal (220) of the fault diagnosis device (200), and the signal transfer device (100) is further configured to transfer the rack signal output by the rotational speed rack (30) to the fault diagnosis device (200).
5. The fault diagnosis system according to claim 4, characterized in that the fault diagnosis device (200) is a recorder.
6. The fault diagnosis system according to claim 4 or 5, wherein the rack signal comprises a rotational speed logic signal, the rack signal output terminal (150) comprises a logic signal output terminal (151), and the signal transfer device (100) further comprises:
and the logic signal processing mechanism (160) is electrically connected with the rack signal input end (140) and the logic signal output end (151), and is used for processing the rotating speed logic signal in the rack signal and transmitting the rotating speed logic signal to the logic signal output end (151).
7. The fault diagnosis system according to claim 6, wherein the logic signal processing mechanism (160) comprises an ac/dc conversion module (161) electrically connected to the rack signal input terminal (140) and the logic signal output terminal (151) for converting the rotation speed logic signal into a logic voltage signal.
8. The fault diagnostic system of claim 4, wherein the rack signal comprises a speed analog signal, the signal relay device (100) further comprising:
and the analog signal processing mechanism (170) is electrically connected with the rack signal input end (140) and the analog signal output end (152), and is used for processing the rotating speed analog signal in the rack signal and transmitting the rotating speed analog signal to the analog signal output end (152).
9. The fault diagnosis system according to claim 8, wherein the analog signal processing means (170) comprises a conversion resistor (171) electrically connected to the rack signal input terminal (140) and the analog signal output terminal (152) for converting the rotation speed analog signal in the rack signal into an analog voltage signal.
10. The fault diagnosis system according to claim 9, characterized in that the resistance value of the conversion resistor (171) is 250 Ω.
11. The fault diagnostic system of claim 4, wherein the rack signal comprises a rotational speed display signal, the signal relay device (100) further comprising:
and the display mechanism (180) is electrically connected with the rack signal input end (140) and is used for displaying according to the rotating speed display signal.
12. The fault diagnosis system according to claim 1, wherein the signal relay device (100) further comprises:
and the remote testing mechanism is electrically connected with the rotating speed rack (30) and is used for inputting a test signal to the rotating speed rack (30) and receiving a processing result of the test signal output by the rotating speed rack (30) so as to test and verify the function of the rotating speed rack (30).
13. The fault diagnosis system of claim 12, wherein the remote testing mechanism comprises at least one of a panel display testing assembly, a low speed signal testing assembly and a low speed signal testing assembly, the panel display testing assembly, the low speed signal testing assembly and the low speed signal testing assembly all being electrically connected to the rotational speed rack (30);
the panel display testing component is used for inputting a rotating speed display testing signal to the rotating speed rack (30) and receiving the rotating speed display signal output after the rotating speed rack (30) is processed so as to verify the display function of the rotating speed rack (30);
the rotating speed low signal testing component is used for inputting a rotating speed low testing signal to the rotating speed rack (30) and receiving a rotating speed low signal triggering signal output after the rotating speed rack (30) is processed so as to verify the processing function of the rotating speed rack (30) on the rotating speed low signal;
the rotating speed low-low signal testing component is used for inputting a rotating speed low-low testing signal to the rotating speed rack (30) and receiving a rotating speed low-low signal triggering signal output after the rotating speed rack (30) is processed so as to verify the processing function of the rotating speed rack (30) on the rotating speed low-low signal.
14. A rotating speed frame with fault diagnosis function, comprising:
the fault diagnosis system (10) of any one of claims 1-13;
the input end of the rotating speed frame (30) is electrically connected with the second rotating speed signal output end (130), and the output end of the rotating speed frame (30) is electrically connected with the frame signal input end (220).
15. A main pump rotational speed monitoring system with a fault diagnosis function, characterized by comprising:
a tacho housing (1) with fault diagnosis functionality according to claim 14;
the output end of the main pump rotating speed detection system (20) is electrically connected with the rotating speed signal input end (110) and used for detecting a rotating speed signal of the main pump.
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