Monitoring protection device

Abstract

The invention discloses a monitoring protection device which comprises a machine body, a plurality of module front panels clamped on the inner side of the machine body and a display screen arranged on the front surface of the machine body. The monitoring system comprises a measurement function module; a communication module; a relay module; a display module; according to the device, a modular design is adopted, and a plurality of measuring modules can be arranged and can be randomly matched according to actual requirements; two-out-of-three, one-out-of-two and other logic configurations of a plurality of relays can be realized without hardware wiring, so that the complexity and the maintenance cost of the system are reduced; a communication bus redundancy design is adopted, and when one bus is abnormal, the other bus is automatically switched, so that the system can stably operate under any condition, and the reliability of the system is improved; comprehensive electric parameters such as tile vibration, shaft vibration, shaft displacement, rotating speed, overspeed, key phase, hydraulic servo-motor, thermal expansion, differential expansion, eccentricity and temperature can be monitored on line.

Description

Technical Field

[0001] The invention belongs to the technical field of equipment monitoring, and in particular relates to a monitoring and protection device. Background Art

[0002] In the power, machinery and other industries, it is very important to monitor the operating status of various equipment in real time and accurately. Once a failure occurs, the loss caused is very serious. In the existing technology, the monitoring and protection of mechanical equipment mainly relies on traditional sensors and signal processing technologies. These traditional solutions usually have the following characteristics: different functional cards are fixed in specific slots, which are difficult to flexibly configure according to actual needs; the logical configuration of relay modules is often implemented through hardware wiring, which lacks sufficient flexibility and configurability; although the design of the communication bus takes into account a certain degree of redundancy, in the face of complex and changeable industrial environments, it is still possible that a single bus failure will cause the entire monitoring system to fail;

[0003] In addition, traditional monitoring and protection devices also have limitations in monitoring electrical parameters. They can often only monitor a few key parameters, such as vibration, rotation speed, etc., but cannot monitor in real time the electrical parameters that comprehensively reflect the operating status of mechanical equipment, such as bearing vibration, shaft vibration, shaft displacement, overspeed, key phase, oil motor, thermal expansion, expansion difference, eccentricity, temperature, etc. This limits the accuracy and timeliness of the monitoring and protection device in early warning and diagnosis of mechanical equipment faults to a certain extent. For this reason, the present invention proposes a monitoring and protection device. Summary of the invention

[0004] The object of the present invention is to provide a monitoring and protection device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a monitoring and protection device, comprising

[0006] A machine body, a plurality of module front panels mounted inside the machine body, a slot guide rail arranged inside the machine body for mounting the plurality of module front panels, and a display screen arranged on the front surface of the machine body, wherein a pull-out aid is also arranged on the surface of the module front panels;

[0007] And monitoring systems, including:

[0008] Measurement function module, used to measure and monitor various parameters;

[0009] A communication module, used for sending and receiving processing signals;

[0010] Relay module, used to distribute the relay logic of the measurement function module;

[0011] Display module, the measurement function module receives the external sensor signal, filters and detects the original signal, converts it into a voltage signal, enters the microcontroller for processing, and transmits the processed signal to the communication module, which transmits the received signal to the display screen for display.

[0012] Preferably, the measurement function module includes:

[0013] Key phase monitoring module, used to monitor the speed and phase information of rotating equipment to ensure that the equipment runs at the correct speed and phase;

[0014] Vibration monitoring module, used to monitor the vibration of rotating equipment, including bearing vibration and shaft vibration, to prevent equipment failure;

[0015] Temperature monitoring module, used to monitor the temperature of rotating equipment to ensure that the equipment operates within the appropriate temperature range;

[0016] Speed / zero speed / key phase monitoring module, used to monitor the speed, zero speed and phase information of rotating equipment, to ensure that the equipment runs at the correct speed and phase, and to avoid abnormal conditions such as overspeed or stall;

[0017] The axial displacement / differential expansion / eccentricity monitoring module is used to monitor the axial displacement, differential expansion and eccentricity of rotating equipment to prevent equipment damage.

[0018] Preferably, the measurement function module also includes a universal digital display monitoring module for displaying various monitoring parameters, such as pressure, flow, etc., and providing an intuitive monitoring interface.

[0019] Preferably, the measurement function module also includes a thermal expansion / tank oil level / hydraulic motor monitoring module, which is used to monitor the thermal expansion of the equipment, the tank oil level and the working status of the hydraulic motor to ensure the normal operation of the equipment.

[0020] Preferably, the measurement function module also includes an axial displacement / shaft vibration monitoring module, which comprehensively monitors the axial displacement and shaft vibration of the rotating equipment and provides comprehensive monitoring protection.

[0021] Preferably, the monitoring system further comprises a power supply module for converting alternating current into direct current required for operation of the measuring function module.

[0022] Preferably, two power modules are provided, and dual power supplies form the system working power supply in the form of split dual-path redundancy.

[0023] Preferably, the back of the measurement function module also has relay output electronics and 4-20mA output terminals.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. Flexible configuration and installation: This device adopts modular design. Multiple measurement modules can be equipped and can be freely matched according to actual needs. Module cards with different functions can be installed in different slots at will, which greatly improves the flexibility and scalability of the system.

[0026] 2. Flexible relay logic configuration: It can realize three-out-of-two, two-out-of-one and other logic configurations of multiple relays without hardware wiring, reducing the complexity and maintenance cost of the system.

[0027] 3. Communication bus redundant design: With communication bus redundant design, when one bus is abnormal, it will automatically switch to another bus to ensure that the system can run stably under any circumstances and improve the reliability of the system.

[0028] 4. Comprehensive real-time monitoring: The monitoring and protection device can implement online monitoring of comprehensive electrical parameters such as bearing vibration, shaft vibration, shaft displacement, speed, overspeed, key phase, oil motor, thermal expansion, expansion difference, eccentricity, temperature, etc., providing accurate and timely data support for mechanical equipment fault warning and diagnosis, effectively reducing equipment failure rate and extending equipment service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the appearance structure of the present invention;

[0030] Figure 2 It is a system framework diagram of the present invention;

[0031] Figure 3 It is the system framework of the test function module of the present invention;

[0032] Figure 4 This is a block diagram of the operating principle of the display screen of the present invention;

[0033] Figure 5 It is a block diagram of the operating principle of the current output of the present invention;

[0034] Figure 6 It is a block diagram of the operating principle of the relay output of the present invention;

[0035] Figure 7 It is a block diagram of the overall operation principle of the present invention;

[0036] In the figure: 1. body; 2. module front panel; 21. ejector; 3. slot guide; 4. display screen. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example

[0039] See also Figures 1 to 7 , is an embodiment of the present invention, which provides a technical solution: a monitoring and protection device, comprising

[0040] A machine body 1, a plurality of module front panels 2 mounted on the inner side of the machine body 1, a slot guide rail 3 arranged on the inner side of the machine body 1 for mounting the plurality of module front panels 2, a display screen 4 arranged on the front surface of the machine body 1, a pull-out aid 21 is also arranged on the surface of the module front panel 2, and module cards with different functions can be arbitrarily installed in different slots, which greatly improves the flexibility and scalability of the system;

[0041] And monitoring systems, including:

[0042] Measurement function module, used to measure and monitor various parameters;

[0043] A communication module, used for sending and receiving processing signals;

[0044] The relay module is used to allocate the relay logic of the measurement function module. The measurement function module sends the relay output logic processed by the internal single-chip microcomputer to the relay module. The relay module feeds back the control signal to the measurement function module. The measurement function module controls its own relay to close or open according to the feedback signal. For the operating principle, please refer to Figure 6 ;

[0045] Display module, the measurement function module receives the external sensor signal, filters the original signal, detects it and converts it into a voltage signal, enters the single-chip microcomputer for processing, and transmits the processed signal to the communication module. The communication module transmits the received signal to the display screen 4 for display. The operating principle is as follows Figure 4 shown.

[0046] Among them, the measurement function modules include:

[0047] The key phase monitoring module is used to monitor the speed and phase information of the rotating equipment to ensure that the equipment runs at the correct speed and phase. The implementation method is: the speed and phase signals are collected through external sensors, and converted into voltage signals after filtering and detection processing, and enter the single-chip microcomputer for processing. The single-chip microcomputer calculates the speed and phase according to the processed signals, and transmits the data to the display screen 4 through the communication module for display;

[0048] The vibration monitoring module is used to monitor the vibration of rotating equipment, including bearing vibration and shaft vibration, to prevent equipment failure. The implementation method is as follows: the vibration signal is collected by the acceleration sensor, and converted into a voltage signal after amplification and filtering. The signal is then processed by the single-chip microcomputer. The single-chip microcomputer calculates the vibration amplitude and frequency based on the processed signal, and transmits the data to the display screen through the communication module. When the vibration exceeds the preset threshold, an alarm signal is issued.

[0049] The temperature monitoring module is used to monitor the temperature of the rotating equipment to ensure that the equipment operates within the appropriate temperature range. The implementation method is: the temperature signal is collected by the temperature sensor, and converted into a voltage signal after amplification and filtering. The signal enters the single-chip microcomputer for processing. The single-chip microcomputer calculates the temperature value based on the processed signal and transmits the data to the display screen through the communication module. When the temperature exceeds the preset threshold, an alarm signal is issued;

[0050] The speed / zero speed / key phase monitoring module is used to monitor the speed, zero speed and phase information of rotating equipment to ensure that the equipment runs at the correct speed and phase to avoid abnormal conditions such as overspeed or stall. The implementation method is similar to the key phase monitoring module, but with the addition of a zero speed monitoring function. When the equipment speed is zero, the module will send out an alarm signal.

[0051] The axial displacement / differential expansion / eccentricity monitoring module is used to monitor the axial displacement, differential expansion and eccentricity of rotating equipment to prevent equipment damage. The implementation method is: the corresponding signals are collected through displacement sensors, differential expansion sensors and eccentricity sensors, and converted into voltage signals after processing. The signals enter the single-chip microcomputer for processing. The single-chip microcomputer calculates the axial displacement, differential expansion and eccentricity values ​​based on the processed signals, and transmits the data to the display screen through the communication module. When these parameters exceed the preset thresholds, an alarm signal is issued.

[0052] Among them, the measurement function module also includes a universal digital display monitoring module, which is used to display various monitoring parameters, such as pressure, flow, etc., and provide an intuitive monitoring interface. The implementation method is: the corresponding signal is collected through an external sensor, converted into a voltage signal after processing, and enters the single-chip microcomputer for processing. The single-chip microcomputer transmits the processed signal to the communication module, and then transmits it to the display screen 4 for display.

[0053] Among them, the measurement function module also includes a thermal expansion / tank oil level / oil motor monitoring module, which is used to monitor the thermal expansion of the equipment, the tank oil level and the working status of the oil motor to ensure the normal operation of the equipment. The implementation method is: the corresponding signals are collected through the thermal expansion sensor, the tank oil level sensor and the oil motor sensor, and converted into voltage signals after processing, and enter the single-chip microcomputer for processing. The single-chip microcomputer calculates the thermal expansion amount, the tank oil level and the oil motor status according to the processed signals, and transmits the data to the display screen 4 for display through the communication module.

[0054] Among them, the measurement function module also includes an axial displacement / shaft vibration monitoring module, which comprehensively monitors the axial displacement and shaft vibration of the rotating equipment and provides comprehensive monitoring protection. The implementation method is: combining the functions of the axial displacement monitoring module and the shaft vibration monitoring module, collecting signals through corresponding sensors, converting them into voltage signals after processing, and entering the single-chip microcomputer for processing. The single-chip microcomputer calculates the axial displacement and shaft vibration values ​​according to the processed signals, and transmits the data to the display screen 4 through the communication module for display.

[0055] The monitoring system also includes a power supply module, which converts alternating current into direct current required for the measurement function module to work.

[0056] Among them, there are two power supply modules, and the dual power supplies form the system working power supply in the form of split dual-path redundancy. Each power supply module can supply power to the entire chassis independently. If any power supply fails, it can ensure that the operation of the device will not be interrupted.

[0057] Among them, there are relay output electronics and 4-20mA output terminals on the back of the measurement function module, which can output switch quantity and 4-20mA current. The PWM wave output by the timer of the single-chip microcomputer inside the measurement function module is converted into current output through the circuit of the measurement function module. The output terminal is at the rear terminal of the measurement function module. The operating principle is as follows Figure 5 shown.

[0058] Although embodiments of the present invention have been shown and described (see the above detailed description for details), it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A monitoring and protection device, characterized in that: include A machine body (1), a plurality of module front panels (2) mounted on the inner side of the machine body (1), a slot guide rail (3) arranged on the inner side of the machine body (1) for mounting the plurality of module front panels (2), and a display screen (4) arranged on the front surface of the machine body (1); a pull-out aid (21) is also arranged on the surface of the module front panels (2); And monitoring systems, including: Measurement function module, used to measure and monitor various parameters; A communication module, used for sending and receiving processing signals; Relay module, used to distribute the relay logic of the measurement function module; The display module and the measurement function module receive the external sensor signal, filter and detect the original signal, and convert it into a voltage signal, which enters the single-chip microcomputer for processing and transmits the processed signal to the communication module. The communication module transmits the received signal to the display screen (4) for display.

2. A monitoring and protection device according to claim 1, characterized in that: The measurement function module includes: Key phase monitoring module, used to monitor the speed and phase information of rotating equipment to ensure that the equipment runs at the correct speed and phase; Vibration monitoring module, used to monitor the vibration of rotating equipment, including bearing vibration and shaft vibration, to prevent equipment failure; Temperature monitoring module, used to monitor the temperature of rotating equipment to ensure that the equipment operates within the appropriate temperature range; Speed / zero speed / key phase monitoring module, used to monitor the speed, zero speed and phase information of rotating equipment, to ensure that the equipment runs at the correct speed and phase, and to avoid abnormal conditions such as overspeed or stall; The axial displacement / differential expansion / eccentricity monitoring module is used to monitor the axial displacement, differential expansion and eccentricity of rotating equipment to prevent equipment damage.

3. A monitoring and protection device according to claim 2, characterized in that: The measurement function module also includes a universal digital display monitoring module for displaying various monitoring parameters, such as pressure, flow, etc., and providing an intuitive monitoring interface.

4. A monitoring and protection device according to claim 3, characterized in that: The measurement function module also includes a thermal expansion / oil tank oil level / hydraulic motor monitoring module, which is used to monitor the thermal expansion of the equipment, the oil tank oil level and the working status of the hydraulic motor to ensure the normal operation of the equipment.

5. A monitoring and protection device according to claim 4, characterized in that: The measurement function module also includes an axial displacement / shaft vibration monitoring module, which comprehensively monitors the axial displacement and shaft vibration of the rotating equipment and provides comprehensive monitoring protection.

6. A monitoring and protection device according to claim 1, characterized in that: The monitoring system also includes a power supply module for converting alternating current into direct current required for the measurement function module to work.

7. A monitoring and protection device according to claim 6, characterized in that: The power supply module is equipped with two pieces, and the dual power supplies form the system working power supply in the form of split dual-path redundancy.

8. A monitoring and protection device according to claim 1, characterized in that: The back of the measurement function module also has relay output electronics and 4-20mA output terminals.

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