Blast furnace blower operation state monitoring and early warning system

Abstract

The utility model provides a kind of blast furnace blower running state monitoring early warning system, including CPU module, first input module, second input module and output module, and the first fan shaft displacement sensor for monitoring fan running state, second fan shaft displacement sensor, first fan air inlet side shaft vibration sensor, second fan air inlet side shaft vibration sensor, first fan exhaust side shaft vibration sensor, second fan exhaust side shaft vibration sensor, fan air inlet side shaft temperature sensor, fan exhaust side shaft temperature sensor.The parameter monitored by the utility model covers blast fan shaft vibration, shaft displacement, temperature and other process parameters and the information that affects unit running state, is more comprehensive and accurate to the grasp of equipment running state, when blast fan state monitoring parameter deviates from process value or operating state appears abnormal, issue acoustic, light signal, the utility model can realize blast furnace blower running state monitoring and fault early warning, effectively curb fault loss.

Description

Technical Field

[0001] This utility model belongs to the field of instrumentation and automatic control technology, and relates to a blast furnace blower operation status monitoring and early warning system. Background Technology

[0002] The blast furnace blower is the most important power equipment in a blast furnace. It not only provides the oxygen needed for blast furnace smelting but also provides the gaseous power needed to overcome the resistance of the blast furnace charge. Stable air supply to modern large and medium-sized blast furnaces is a necessary condition for stable furnace temperature and gas flow, ensuring smooth operation. Its reliability directly affects the entire blast furnace production. An unexpected shutdown of the blast furnace blower can lead to serious safety accidents and cause huge losses to steel companies. Blower condition monitoring and fault early warning refers to using online monitoring instruments and various detection, monitoring, analysis, and judgment methods to assess abnormal conditions, defects, and performance deterioration of the blower equipment during operation (whether it is normal or abnormal), promptly issuing alarms for abnormal conditions, and providing information and data for further fault analysis and performance evaluation. This provides correct technical support for maintaining the normal operation and proper maintenance of the equipment. Therefore, from a safety perspective, monitoring the operating status and fault early warning of blast furnace blowers can effectively curb blower failure losses and equipment maintenance costs, and avoid, mitigate, and reduce the occurrence of major accidents. However, the monitoring of the operating status and fault early warning of high-risk equipment in large rotating machinery is currently a relatively weak link in condition monitoring and early warning technology. How to discover problems, improve equipment status, maintain optimal equipment performance, and achieve zero-fault safe operation of blast furnace blowers through reliable monitoring and fault early warning of blast furnace blower operating status is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0003] The purpose of this utility model is to address the problems existing in the prior art by providing a blast furnace blower operation status monitoring and early warning system. This system solves the problem that current systems for monitoring the operation status and providing early warning of faults for high-risk equipment such as large rotating machinery cannot effectively monitor the operation status of blast furnace blowers and provide early warning of faults, thus affecting the safe operation of blast furnace blowers.

[0004] Therefore, the present invention adopts the following technical solution:

[0005] A blast furnace blower operation status monitoring and early warning system includes a CPU module, a first input module, a second input module, and an output module, as well as a first blower shaft displacement sensor, a second blower shaft displacement sensor, a first blower inlet side shaft vibration sensor, a second blower inlet side shaft vibration sensor, a first blower exhaust side shaft vibration sensor, a second blower exhaust side shaft vibration sensor, a blower inlet side shaft temperature sensor, and a blower exhaust side shaft temperature sensor for monitoring the blower's operating status; wherein:

[0006] The first fan shaft displacement sensor is electrically connected to the first input module via a first fan shaft displacement preamplifier; the second fan shaft displacement sensor is electrically connected to the first input module via a second fan shaft displacement preamplifier; the first fan inlet side shaft vibration sensor is electrically connected to the first input module via a first fan inlet side shaft vibration preamplifier; the second fan inlet side shaft vibration sensor is electrically connected to the first input module via a second fan inlet side shaft vibration preamplifier; the first fan exhaust side shaft vibration sensor is electrically connected to the first input module via a first fan exhaust side shaft vibration preamplifier; the second fan exhaust side shaft vibration sensor is electrically connected to the first input module via a second fan exhaust side shaft vibration preamplifier; the fan inlet side shaft temperature sensor is electrically connected to the first input module via a fan inlet side shaft temperature transmitter; the fan exhaust side shaft temperature sensor is electrically connected to the first input module via a fan exhaust side shaft temperature transmitter.

[0007] Furthermore, it also includes a first speed increaser shaft temperature sensor, a second speed increaser shaft temperature sensor, a third speed increaser shaft temperature sensor, and a fourth speed increaser shaft temperature sensor for monitoring the operating status of the transmission; wherein:

[0008] The first speed increaser shaft temperature sensor is electrically connected to the second input module via a first speed increaser shaft temperature transmitter; the second speed increaser shaft temperature sensor is electrically connected to the second input module via a second speed increaser shaft temperature transmitter; the third speed increaser shaft temperature sensor is electrically connected to the second input module via a third speed increaser shaft temperature transmitter; and the fourth speed increaser shaft temperature sensor is electrically connected to the second input module via a fourth speed increaser shaft temperature transmitter.

[0009] Furthermore, it also includes a first motor shaft temperature sensor, a second motor shaft temperature sensor, a first motor stator temperature sensor, a second motor stator temperature sensor, and a third motor stator temperature sensor for monitoring the motor's operating status; wherein:

[0010] The first motor shaft temperature sensor is electrically connected to the second input module via a first motor shaft temperature transmitter; the second motor shaft temperature sensor is electrically connected to the second input module via a second motor shaft temperature transmitter; the first motor stator temperature sensor is electrically connected to the second input module via a first motor stator temperature transmitter; the second motor stator temperature sensor is electrically connected to the second input module via a second motor stator temperature transmitter; and the third motor stator temperature sensor is electrically connected to the second input module via a third motor stator temperature transmitter.

[0011] Furthermore, the output module is electrically connected to the alarm.

[0012] Furthermore, the CPU module is electrically connected to the monitor.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The parameters monitored during the use of this utility model cover information on the impact of process and operating parameters such as blower shaft vibration, shaft displacement and temperature on the unit's operating status. It provides a comprehensive and accurate grasp of the equipment's operating status, reduces the risk assessment and limitation of uncertainty, predicts faults and risks in a timely manner, and ensures the safe operation of the blast furnace blower with zero faults.

[0015] 2. This utility model uses the blast furnace blower operation status detection and fault early warning to achieve predictive maintenance based on the actual condition of the equipment, optimize maintenance and repair, and realize planned maintenance that increases efficiency and saves energy. Specifically, when the blower status monitoring parameters deviate from the process value or the operation status is abnormal, this utility model will immediately issue audible and visual signals to warn the on-duty personnel to make the correct judgment.

[0016] 3. To avoid unnecessary false alarms due to spurious signals, this utility model adopts multi-sensor control logic and defines a delay. When the early warning system receives a signal that exceeds the trip limit, at least two independent sensors simultaneously confirm the signal, and the limit is exceeded within a specified time before a danger alarm signal is issued. This can significantly reduce the number of false alarm shutdowns and reduce economic losses. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] In the diagram, 1-First fan shaft displacement sensor, 2-Second fan shaft displacement sensor, 3-First fan inlet side shaft vibration sensor, 4-Second fan inlet side shaft vibration sensor, 5-First fan exhaust side shaft vibration sensor, 6-Second fan exhaust side shaft vibration sensor, 7-Fan inlet side shaft temperature sensor, 8-Fan exhaust side shaft temperature sensor, 9-First speed increaser shaft temperature sensor, 10-Second speed increaser shaft temperature sensor, 11-Third speed increaser shaft temperature sensor, 12-Fourth speed increaser shaft temperature sensor, 13-First motor shaft temperature sensor, 14-First motor stator temperature sensor, 15-Second motor stator temperature sensor, 16-Third motor stator temperature sensor, 17-Second motor shaft temperature sensor, 18-Fan inlet side shaft temperature transmitter, 19-First fan shaft displacement preamplifier, 20-Second fan shaft displacement preamplifier, 21-First fan inlet side shaft temperature transmitter. Vibration preamplifier, 22-Second fan intake side shaft vibration preamplifier, 23-First fan exhaust side shaft vibration preamplifier, 24-Second fan exhaust side shaft vibration preamplifier, 25-Fan exhaust side shaft temperature transmitter, 26-First speed increaser shaft temperature transmitter, 27-Third speed increaser shaft temperature transmitter, 28-Second speed increaser shaft temperature transmitter, 29-Fourth speed increaser shaft temperature transmitter, 30-First motor shaft temperature transmitter, 31-First motor stator temperature transmitter, 32-Second motor stator temperature transmitter, 33-Third motor stator temperature transmitter, 34-Second motor shaft temperature transmitter, 35-First input module, 36-Second input module, 37-Output module, 38-CPU module, 39-Alarm module, 40-Monitor, 41-Electric bell, 42-Test button, 43-Confirm button, 44-Monitoring fan, 45-Gearbox, 46-Motor. Detailed Implementation

[0019] The technical solution of this utility model will be described below with reference to the accompanying drawings and implementation methods. Example

[0020] like Figure 1 As shown, a blast furnace blower operation status monitoring and early warning system includes a CPU module 38, a first input module 35, a second input module 36, and an output module 37.

[0021] And the following sensors for monitoring the operating status of fan 44: first fan shaft displacement sensor 1, second fan shaft displacement sensor 2, first fan inlet side shaft vibration sensor 3, second fan inlet side shaft vibration sensor 4, first fan exhaust side shaft vibration sensor 5, second fan exhaust side shaft vibration sensor 6, fan inlet side shaft temperature sensor 7, and fan exhaust side shaft temperature sensor 8; wherein:

[0022] The first fan shaft displacement sensor 1 is electrically connected to the first input module 35 via the first fan shaft displacement preamplifier 19; the second fan shaft displacement sensor 2 is electrically connected to the first input module 35 via the second fan shaft displacement preamplifier 20; the first fan intake side shaft vibration sensor 3 is electrically connected to the first input module 35 via the first fan intake side shaft vibration preamplifier 21; the second fan intake side shaft vibration sensor 4 is electrically connected to the first input module 35 via the second fan intake side shaft vibration preamplifier 22; the first fan exhaust side shaft vibration sensor 5 is electrically connected to the first input module 35 via the first fan exhaust side shaft vibration preamplifier 23; the second fan exhaust side shaft vibration sensor 6 is electrically connected to the first input module 35 via the second fan exhaust side shaft vibration preamplifier 24; the fan intake side shaft temperature sensor 7 is electrically connected to the first input module 35 via the fan intake side shaft temperature transmitter 18; and the fan exhaust side shaft temperature sensor 8 is electrically connected to the first input module 35 via the fan exhaust side shaft temperature transmitter 25.

[0023] Specifically, both the first fan shaft displacement preamplifier 19 and the second fan shaft displacement preamplifier 20 are equipped with eddy current displacement probes to monitor the rotor displacement relative to the bearing bush. They have isolated two-stage alarm relay (normally open) output terminals, allowing for the setting of warning alarm values ​​and danger alarm values. The two-stage relay outputs are fully isolated dry contact outputs with a relay contact capacity of 2A / 24V. They also feature a remote alarm reset function.

[0024] The first fan intake side shaft vibration preamplifier 21, the second fan intake side shaft vibration preamplifier 22, the first fan exhaust side shaft vibration preamplifier 23, and the second fan exhaust side shaft vibration preamplifier 24 are all equipped with eddy current shaft vibration probes to monitor the radial vibration of the fan intake and exhaust side shafts. The above shaft vibration preamplifiers use the same configuration and alarm point settings. The shaft vibration preamplifiers have isolated two-stage alarm relay (normally open) output terminals, which can set warning alarm values ​​and danger alarm values. The two-stage relay outputs are fully isolated dry contact outputs with a relay contact capacity of 2A / 24V and a remote alarm reset function.

[0025] This embodiment also includes a first speed increaser shaft temperature sensor 9, a second speed increaser shaft temperature sensor 10, a third speed increaser shaft temperature sensor 11, and a fourth speed increaser shaft temperature sensor 12 for monitoring the operating status of the transmission 45; wherein:

[0026] The first speed increaser shaft temperature sensor 9 is electrically connected to the second input module 36 via the first speed increaser shaft temperature transmitter 26; the second speed increaser shaft temperature sensor 10 is electrically connected to the second input module 36 via the second speed increaser shaft temperature transmitter 28; the third speed increaser shaft temperature sensor 11 is electrically connected to the second input module 36 via the third speed increaser shaft temperature transmitter 27; and the fourth speed increaser shaft temperature sensor 12 is electrically connected to the second input module 36 via the fourth speed increaser shaft temperature transmitter 29.

[0027] This embodiment also includes a first motor shaft temperature sensor 13, a second motor shaft temperature sensor 17, a first motor stator temperature sensor 14, a second motor stator temperature sensor 15, and a third motor stator temperature sensor 16 for monitoring the operating status of the motor 46; wherein:

[0028] The first motor shaft temperature sensor 13 is electrically connected to the second input module 36 via the first motor shaft temperature transmitter 30; the second motor shaft temperature sensor 17 is electrically connected to the second input module 36 via the second motor shaft temperature transmitter 34; the first motor stator temperature sensor 14 is electrically connected to the second input module 36 via the first motor stator temperature transmitter 31; the second motor stator temperature sensor 15 is electrically connected to the second input module 36 via the second motor stator temperature transmitter 32; and the third motor stator temperature sensor 16 is electrically connected to the second input module 36 via the third motor stator temperature transmitter 33.

[0029] Output module 37 is electrically connected to alarm 39; CPU module 38 is electrically connected to monitor 40.

[0030] The input terminals of the alarm 39 are connected to the alarm output channel of the output module 37, and the other terminals are electrically connected to the electric bell 41, the test button 42, and the confirmation button 43. When the alarm 39 is turned on, the electric bell 41 is also turned on. The alarm 39 emits a light source, and the electric bell 41 emits a sound, realizing an audible and visual alarm. When the test button 42 is closed, the alarm 39 is turned on, and when the confirmation button 43 is closed, the alarm 39 is turned off. The test button 42 and the confirmation button 43 are used to confirm whether the alarm 39 is working properly.

[0031] Specifically, the alarm 39 uses a low-power CMOS integrated circuit and an LED light-emitting matrix, which has the characteristics of strong anti-interference ability and high brightness. In addition, it adopts a unit structure, so the configuration is flexible and the system reliability is high. The parameters of the alarm 39 are: power supply 24V.DC±5%; input: electrical contact type, normally open, one unit is one channel; flashing frequency: 0.5 seconds / time; power consumption 4W.

[0032] The temperature sensors used in this embodiment are all dual-core resistance temperature detectors (RTDs), and the temperature transmitters are all dual-channel process quantity monitoring meters, used for online real-time measurement of blower bearing temperature, speed increaser bearing temperature, and motor bearing temperature.

[0033] In actual use, this embodiment uses shaft displacement and shaft vibration sensors for monitoring, and an automatic control system is used to control the two monitoring points. AND logic is implemented between the shaft displacement measurement points and the shaft vibration measurement points to increase the reliability of the system interlocking action. If the shaft displacement or shaft vibration value exceeds the trip limit, the fan will automatically stop, thereby enhancing the reliability of the system's early warning action and reducing the number of shutdowns.

[0034] In addition, to avoid unnecessary false trips due to spurious signals, it is necessary to employ a multi-sensor control logic and define a delay before the automatic system stops the fan. Therefore, when the system receives a signal exceeding the trip limit, at least two independent sensors must simultaneously confirm the signal, and the fan will only stop if the limit is exceeded within a specified time; generally, the delay time is set in the range of 1 to 3 seconds.

Claims

1. A blast furnace blower operation status monitoring and early warning system, characterized in that, The system includes a CPU module (38), a first input module (35), a second input module (36), and an output module (37), as well as a first fan shaft displacement sensor (1), a second fan shaft displacement sensor (2), a first fan inlet side shaft vibration sensor (3), a second fan inlet side shaft vibration sensor (4), a first fan exhaust side shaft vibration sensor (5), a second fan exhaust side shaft vibration sensor (6), a fan inlet side shaft temperature sensor (7), and a fan exhaust side shaft temperature sensor (8) for monitoring the operating status of the fan (44); wherein: The first fan shaft displacement sensor (1) is electrically connected to the first input module (35) via the first fan shaft displacement preamplifier (19); the second fan shaft displacement sensor (2) is electrically connected to the first input module (35) via the second fan shaft displacement preamplifier (20); the first fan inlet side shaft vibration sensor (3) is electrically connected to the first input module (35) via the first fan inlet side shaft vibration preamplifier (21); the second fan inlet side shaft vibration sensor (4) is electrically connected to the first input module (35) via the second fan inlet side shaft vibration preamplifier (22); The first fan exhaust side shaft vibration sensor (5) is electrically connected to the first input module (35) through the first fan exhaust side shaft vibration preamplifier (23); the second fan exhaust side shaft vibration sensor (6) is electrically connected to the first input module (35) through the second fan exhaust side shaft vibration preamplifier (24); the fan intake side shaft temperature sensor (7) is electrically connected to the first input module (35) through the fan intake side shaft temperature transmitter (18); and the fan exhaust side shaft temperature sensor (8) is electrically connected to the first input module (35) through the fan exhaust side shaft temperature transmitter (25).

2. The blast furnace blower operation status monitoring and early warning system according to claim 1, characterized in that, It also includes a first speed increaser shaft temperature sensor (9), a second speed increaser shaft temperature sensor (10), a third speed increaser shaft temperature sensor (11), and a fourth speed increaser shaft temperature sensor (12) for monitoring the operating status of the transmission (45); wherein: The first speed increaser shaft temperature sensor (9) is electrically connected to the second input module (36) through the first speed increaser shaft temperature transmitter (26); the second speed increaser shaft temperature sensor (10) is electrically connected to the second input module (36) through the second speed increaser shaft temperature transmitter (28); the third speed increaser shaft temperature sensor (11) is electrically connected to the second input module (36) through the third speed increaser shaft temperature transmitter (27); and the fourth speed increaser shaft temperature sensor (12) is electrically connected to the second input module (36) through the fourth speed increaser shaft temperature transmitter (29).

3. The blast furnace blower operation status monitoring and early warning system according to claim 2, characterized in that, It also includes a first motor shaft temperature sensor (13), a second motor shaft temperature sensor (17), a first motor stator temperature sensor (14), a second motor stator temperature sensor (15), and a third motor stator temperature sensor (16) for monitoring the operating status of the motor (46); wherein: The first motor shaft temperature sensor (13) is electrically connected to the second input module (36) through the first motor shaft temperature transmitter (30); the second motor shaft temperature sensor (17) is electrically connected to the second input module (36) through the second motor shaft temperature transmitter (34); the first motor stator temperature sensor (14) is electrically connected to the second input module (36) through the first motor stator temperature transmitter (31); the second motor stator temperature sensor (15) is electrically connected to the second input module (36) through the second motor stator temperature transmitter (32); and the third motor stator temperature sensor (16) is electrically connected to the second input module (36) through the third motor stator temperature transmitter (33).

4. The blast furnace blower operation status monitoring and early warning system according to claim 1, characterized in that, The output module (37) is electrically connected to the alarm (39).

5. The blast furnace blower operation status monitoring and early warning system according to claim 1, characterized in that, The CPU module (38) is electrically connected to the monitor (40).

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