Sodium-cooled fast reactor main pump vibration monitoring device and method

Abstract

The invention belongs to the technical field of instruments and control, and particularly relates to a sodium-cooled fast reactor main pump vibration monitoring device and method. Comprising a signal acquisition module, a signal conversion module, a communication conversion module, a power supply and power supply conversion module, a signal processing module, a signal output module, a guide rail, a fixing device and a box body. The main pump vibration monitoring system has the beneficial effects that the main pump vibration monitoring system is simplified, the system interface is simplified, the operation reliability and stability are improved, and the operation and maintenance cost is reduced. According to the invention, a plurality of interfaces are reserved for signals acquired and processed by the main pump vibration monitoring system, so that maintenance and acquisition, processing and research of the signals are facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of instrumentation and control, and in particular relates to a vibration monitoring device and method for a main pump of a sodium-cooled fast reactor. Background Art

[0002] The vibration detectors used in the main pumps of the primary and secondary circuits of the sodium-cooled fast reactor frequently show vibration values ​​that are higher than the actual measured values ​​on site. In addition, the signals transmitted by the communication protocol used are attenuated due to the limitation of transmission distance. The addition of signal relay stations has made the transmission path of the entire monitoring system complicated. The signals are transferred many times and use multiple communication protocols. In order to realize the vibration monitoring function of the main pump independently and reliably, domestic vibration monitoring probes are used as replacements, and the vibration monitoring scheme is modified simultaneously. This scheme uses domestic vibration probes, which are converted into 4-20mA standard signals through signal conversion cards, and then converted into communication signals through signal protocol conversion cards. The existing cables in the Russian-supplied secondary instrument cabinet are used to send the signals to the Russian-supplied control cabinet, and then forwarded to the DCS. This scheme has been verified on the sodium-cooled fast reactor, and the vibration signal monitoring of the main pump is normal, realizing the localization of Russian-supplied equipment and achieving the goal of independent control of the equipment. Summary of the invention

[0003] The purpose of the present invention is to provide a sodium-cooled fast reactor main pump vibration monitoring device and method, which can realize the vibration monitoring of the sodium-cooled fast reactor main pump.

[0004] The technical solution of the present invention is as follows: a sodium-cooled fast reactor main pump vibration monitoring device, including a signal acquisition module, a signal conversion module, a communication conversion module, a power supply and power conversion module, a signal processing module, a signal output module, a guide rail and a fixing device and a box.

[0005] The signal acquisition module performs secondary processing on the acquired main pump vibration monitoring signal.

[0006] The signal conversion module converts the velocity sensor or acceleration sensor signal collected by the acquisition module into a standard 4-20mA signal, and copies, collects, amplifies, isolates and outputs the signal.

[0007] The power supply and power conversion module provides an interface and includes a voltage-stabilizing power supply module to convert 220VAC power into a stable 12-36VDC standard DC power supply.

[0008] The communication conversion module connects the output signal of the signal conversion module to the 485 converter.

[0009] The signal processing module includes a PLC main control module, which processes the signal output by the acquisition module and converts the input signal into a standard 4-20mA signal or a 1-5VDC signal. The output of the module is a copied mV signal and an amplified 1-5V standard voltage signal, as well as a 4-20mA standard current signal.

[0010] The box has an outer dimension of 600mm*600mm*300mm metal cube, and includes 1 power input point, 1 input opening and 1 output opening at the bottom of the box. Two rows of guide rails are arranged inside the box. The upper row of guide rails is used to fix the power conversion module, the main control module and the signal processing module, and the lower row of guide rails is used to fix the input module, the output module, the signal conversion module and the communication conversion module. The modules have their own input and output terminals.

[0011] A method for monitoring the vibration of a main pump of a sodium-cooled fast reactor comprises the following steps: a data acquisition card acquires an original main pump vibration signal; a signal conversion module converts a velocity sensor or an acceleration sensor signal acquired by the acquisition module into a standard 4-20mA signal, and copies, acquires, amplifies, isolates and outputs the signal; and a communication conversion module connects the output signal of the 4-20mA standard signal conversion module to a 485 converter.

[0012] The beneficial effects of the present invention are as follows: the present invention simplifies the main pump vibration monitoring system, simplifies the system interface, improves the reliability and stability of operation, and reduces the operation and maintenance costs. The present invention retains more interfaces for the signals collected and processed by the main pump vibration monitoring system, which is convenient for maintenance and signal collection, processing and research. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Electrical schematic diagram for vibration monitoring of main pump;

[0014] Figure 2 This is a schematic diagram of a sodium-cooled fast reactor main pump vibration monitoring device provided by the present invention. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] A sodium-cooled fast reactor main pump vibration monitoring device collects vibration signals of the sodium-cooled fast reactor main pump through a vibration monitoring probe. The device includes a signal acquisition module, a signal conversion module, a communication conversion module, a power supply and power conversion module, a signal processing module, a guide rail and a fixing device, and an external box.

[0017] The signal acquisition module performs secondary processing on the collected vibration monitoring signal of the main pump, which can be a velocity sensor or an acceleration sensor. After the signal is collected, it is sent to the signal processing module.

[0018] The signal conversion module converts the velocity sensor or acceleration sensor signal collected by the acquisition module into a standard 4-20mA signal. In addition, the signal can be copied, collected, amplified, and isolated for output. Its front-end design has modules for copying, collecting, and amplifying the velocity sensor or acceleration sensor signal, and provides a query voltage for the module.

[0019] The power supply and power conversion module provides an interface, including a voltage-stabilized power supply module, which converts 220VAC power into a stable 12-36VDC standard DC power supply. If the external system provides a stable 24VDC power supply, this module can be bypassed and the 24VDC power supply can be directly connected.

[0020] The communication conversion module connects the output signal of the signal conversion module to the 485 converter (4-20mA to 485), and (depending on the needs of the site) every 3 or more signals are connected to a 485 converter. Each pump has 9 vibration signals, and (depending on the needs of the site) three or more 485 converters can be configured as needed, as shown in the figure. Use the power supply and power conversion module to power the 485 converter. Connect the three 485 converters in a bus-type connection and configure the terminal resistor. The terminal resistor is connected to both ends of the transmission bus, and its resistance is required to be equal to the characteristic impedance of the transmission cable, generally 120Ω (adjustable). The communication address (slave address) of the 485 device can be flexibly configured.

[0021] The signal processing module includes a set of PLC main control modules, which can process the signal output by the acquisition module, and convert the input signal into a standard 4-20mA signal or 1-5VDC signal through an internal algorithm. The output of the module is a copied mV signal, an amplified 1-5V standard voltage signal, and a 4-20mA standard current signal. The signal can be output to the rear processing module, or it can be directly output to a third-party data processing system after isolation.

[0022] The signal processing module is a mature module that can directly collect and process signals after being packaged, such as the signal processor of Siemens PLC system and the signal CPU module / main control module of domestic DCS control system.

[0023] The box has an outer dimension of 600mm*600mm*300mm metal (stainless steel) cube. The box must meet the IP65 grade, and the EMC shielding requirements must be considered. The equipment must consider the requirements of high temperature resistance and radiation resistance. The bottom of the box includes 1 power input point, 1 input opening and 1 output opening. Two rows of guide rails are set inside the box. The upper row of guide rails is used to fix the power conversion module, the main control module, and the signal processing module. The lower row of guide rails is used to fix the input module (including the signal acquisition and replication module, the isolation amplification module), the output module, the signal conversion module, and the communication conversion module. The module has its own input and output terminals.

[0024] A method for monitoring vibration of a main pump of a sodium-cooled fast reactor comprises the following steps:

[0025] The data acquisition card collects the original main pump vibration signal, which is generally a speed signal mm / s or an acceleration signal mm / s^2. The signal conversion module converts the speed sensor or acceleration sensor signal collected by the acquisition module into a standard 4-20mA signal, and copies, collects, amplifies, isolates and outputs the signal. The communication conversion module connects the output signal of the 4-20mA standard signal conversion module to the 485 converter (4-20mA to 485). (Depending on site needs) Every 3 or more signals are connected to a 485 converter, and each pump has 9 vibration signals. (Depending on site needs) Three or more 485 converters can be configured as needed, such as Figure 1 . Connect three 485 converters in bus connection and configure terminal resistors. The terminal resistors are connected to both ends of the transmission bus, and their resistance is required to be equal to the characteristic impedance of the transmission cable, generally 120Ω (adjustable). The communication address (slave address) of the 485 device can be flexibly configured.

[0026] The characteristics of the present invention are as follows:

[0027] 1) The appearance and internal module design of the main pump vibration monitoring device for sodium-cooled fast reactor.

[0028] 2) Signal acquisition, replication, isolation, amplification, signal conversion, communication architecture design, and signal output processing of the sodium-cooled fast reactor main pump vibration monitoring device.

[0029] 3) Signal processing algorithm for the vibration monitoring device of the main pump of the sodium-cooled fast reactor.

[0030] The above descriptions are only preferred implementation modes of the present invention. As long as the technical solutions for the purpose of the present invention are achieved by substantially the same means, they are all within the protection scope of the present invention.

[0031] Obviously, the described embodiments are only some embodiments of the present invention, but not all 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.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sodium-cooled fast reactor main pump vibration monitoring device, characterized in that: It includes a signal acquisition module, a signal conversion module, a communication conversion module, a power supply and power conversion module, a signal processing module, a signal output module, a guide rail and a fixing device and a box.

2. A sodium-cooled fast reactor main pump vibration monitoring device as claimed in claim 1, characterized in that: The signal acquisition module performs secondary processing on the acquired main pump vibration monitoring signal.

3. A sodium-cooled fast reactor main pump vibration monitoring device as claimed in claim 1, characterized in that: The signal conversion module converts the velocity sensor or acceleration sensor signal collected by the acquisition module into a standard 4-20mA signal, and copies, collects, amplifies, isolates and outputs the signal.

4. A sodium-cooled fast reactor main pump vibration monitoring device as claimed in claim 1, characterized in that: The power supply and power conversion module provides an interface and includes a voltage-stabilizing power supply module to convert 220VAC power into a stable 12-36VDC standard DC power supply.

5. A sodium-cooled fast reactor main pump vibration monitoring device as claimed in claim 1, characterized in that: The communication conversion module connects the output signal of the signal conversion module to the 485 converter.

6. A sodium-cooled fast reactor main pump vibration monitoring device as claimed in claim 1, characterized in that: The signal processing module includes a PLC main control module, which processes the signal output by the acquisition module and converts the input signal into a standard 4-20mA signal or a 1-5VDC signal. The output of the module is a copied mV signal and an amplified 1-5V standard voltage signal, as well as a 4-20mA standard current signal.

7. A sodium-cooled fast reactor main pump vibration monitoring device as claimed in claim 1, characterized in that: The box has an outer dimension of 600mm*600mm*300mm metal cube, and includes 1 power input point, 1 input opening and 1 output opening at the bottom of the box. Two rows of guide rails are arranged inside the box. The upper row of guide rails is used to fix the power conversion module, the main control module and the signal processing module, and the lower row of guide rails is used to fix the input module, the output module, the signal conversion module and the communication conversion module. The modules have their own input and output terminals.

8. A method for monitoring vibration of a main pump of a sodium-cooled fast reactor, characterized in that: The method comprises the following steps: a data acquisition card acquires the original main pump vibration signal; a signal conversion module converts the velocity sensor or acceleration sensor signal acquired by the acquisition module into a standard 4-20mA signal, and copies, acquires, amplifies, isolates and outputs the signal; a communication conversion module converts the output signal of the 4-20mA standard signal conversion module and connects it to a 485 converter.

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