CN220019326U - Full-automatic multi-working-condition corrosion platform - Google Patents
Full-automatic multi-working-condition corrosion platform Download PDFInfo
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- CN220019326U CN220019326U CN202320806381.7U CN202320806381U CN220019326U CN 220019326 U CN220019326 U CN 220019326U CN 202320806381 U CN202320806381 U CN 202320806381U CN 220019326 U CN220019326 U CN 220019326U
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- 230000007797 corrosion Effects 0.000 title claims abstract description 25
- 238000005260 corrosion Methods 0.000 title claims abstract description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 191
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 96
- 238000012360 testing method Methods 0.000 claims abstract description 37
- 239000007789 gas Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims description 11
- 230000001276 controlling effect Effects 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000007613 environmental effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000009517 secondary packaging Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000006056 electrooxidation reaction Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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Abstract
The utility model discloses a full-automatic multi-working-condition corrosion platform which is composed of an air compressor, a cold dryer, a nitrogen generator, a concentration proportioner, a heater, a humidifier and a computer management system. The air compressor is used for generating high-pressure air and providing the high-pressure air for the cold dryer, the cold dryer dehumidifies and removes dust, the dehumidified and dedusted dry air is divided into two paths for supplying, one path is provided for the nitrogen generator, and the other path is provided for the concentration proportioner; the nitrogen generator generates high purity nitrogen and also sends the high purity nitrogen to the concentration proportioner. The concentration proportioner controls the flow of two paths of input gases and mixes the two paths of input gases into nitrogen with specified concentration. Wherein the feedback is formed by the measurement result of the nitrogen concentration analyzer. After passing through the proportioner, the nitrogen is heated to a specified temperature by a heater and enters a test box, a humidifier is arranged in the test box, and the humidity of the test box is controlled. The utility model can meet the corrosion simulation under different experimental environments and has important significance for evaluating the corrosion performance of the material.
Description
Technical Field
The utility model relates to the technical field of corrosion maintenance, in particular to a full-automatic multi-working-condition corrosion platform.
Background
The most extensive corrosion factor of the nuclear power station equipment can be attributed to the atmosphere with aggressive ions, a thin liquid film is formed on the surface of the metal material, and the most common electrochemical corrosion of the metal can be formed by adding oxygen to dissolve into the thin film, so that the metal equipment is slowly dissolved and destroyed. The metal equipment can be corroded and failed for a long time under the environment, so that economic loss is caused, and safety accidents are caused seriously.
From analysis of corrosion mechanism of the equipment, the main factor affecting corrosion of the equipment is the presence of oxygen and the formation condition of the electrolyte film. Equipment corrosion maintenance can be studied in two ways: on the one hand, the maintenance method by using dry wind, namely the maintenance principle is to reduce the relative humidity in the air, so that the surface of the equipment is dried, and an electrolyte layer which is subjected to electrochemical corrosion is not formed on the surface of the equipment, thereby reducing the corrosion rate of the equipment; on the other hand, the method is a nitrogen filling maintenance method, namely, the process of replacing oxygen by continuously introducing nitrogen in the environment where the equipment is located. In the atmosphere, the surface of the equipment is communicated with the atmosphere, oxygen is dissolved in a thin liquid film adsorbed on the surface of the equipment, oxygen absorption corrosion is formed, and a nitrogen protection method is an important means for inhibiting the oxygen absorption corrosion.
At present, in order to explore the effects of the two corrosion maintenance methods, an experimental platform is required to be built to study the corrosion behavior of common materials of the nuclear power plant equipment and evaluate the material maintenance effect, so that data support and theoretical basis are provided for the practical application of the maintenance of the nuclear power plant equipment.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides a full-automatic multi-working-condition corrosion platform.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
a full-automatic multi-working condition corrosion experiment platform comprises an air compressor, a cold dryer, a nitrogen generator, a concentration proportioner, a heater, a humidifier, a first controller, a second controller, an acquisition module and a test box;
the air compressor is communicated with a built-in cold dryer of the nitrogen generator, one output path of the cold dryer is connected with the nitrogen generator to produce nitrogen, and the other path of the cold dryer is connected with the concentration proportioner to regulate the concentration of the output nitrogen;
the concentration proportioner comprises a nitrogen flow controller and an air and flow controller; the nitrogen produced by the nitrogen generator and the air output by the cold dryer enter a corresponding nitrogen flow controller and air and flow controller to be mixed, the concentration of the nitrogen is regulated by a concentration proportioner, the nitrogen with the regulated concentration enters an air heater, and then enters a nitrogen analyzer in a test box; the nitrogen analyzer measures and outputs the nitrogen concentration, and the valve switch of the concentration proportioner is adjusted according to the concentration;
the first controller is respectively connected with the air compressor, the cold dryer, the nitrogen generator, the concentration proportioner, the nitrogen concentration meter and the air heater, and controls the opening and closing angle of the electric valve of the concentration regulator according to the set nitrogen concentration and the measured concentration difference value, and adjusts the input air quantity to keep the nitrogen concentration in the mixed gas at a certain value;
and (3) heating gas: the controller reads the value of the temperature sensor and adjusts the temperature of the output gas by controlling the air heater;
humidification of gas: the controller reads the humidity value of the temperature and humidity sensor, controls the humidifier and adjusts the humidity of the output gas;
further, the acquisition module comprises an upper computer interface, a control interface and a sensor interface; acquiring information of a sensor, acquiring system flow and temperature and humidity parameters, and transmitting the parameters to a host through an RS485 interface; meanwhile, the control command sent by the host can be received to control each module in the system; the start and stop of the nitrogen generator and the flow are controlled, the start and stop of the fan are controlled, and the heating temperature of the air heater is controlled.
Furthermore, the temperature and humidity sensor adopts an SHT30 temperature and humidity sensor, and the sensor converts acquired temperature and humidity signals into digital values and transmits the digital values to the MCU by adopting an I2C interface; when the sensor is used in a high humidity environment, the sensor is subjected to secondary packaging, and a waterproof shell is additionally arranged.
Further, the second controller is a test box environment controller, and the test box environment controller is arranged in the test box and controls the humidity of the test box; the environmental controller of the test box is provided with a Modbus RTU interface which can receive control parameters from a PC.
Further, the humidity of the test box adopts an ultrasonic atomizer to generate water vapor, and the atomized water vapor is blown into the test box by utilizing one path of gas branch to humidify the environment in the box; the working process of the ultrasonic atomizer is managed by a controller, and the controller drives a relay to control the on-off of the power supply of the ultrasonic atomizer.
The utility model has the technical effects and advantages that:
(1) The full-automatic multi-working-condition corrosion experimental platform can accurately control various experimental parameters of the environment of the test box, such as: the relative humidity, temperature and nitrogen concentration of the test chamber, the magnitude of which can be understood as the magnitude of the oxygen content of the test chamber, and the simulation of the aggressive ions can be configured by humidifying the solution. In conclusion, the experimental platform can meet the corrosion simulation under different experimental environments, and has important significance for corrosion performance evaluation of materials.
(2) According to the full-automatic multi-working-condition corrosion experiment platform, the environmental parameters of the experiment box are controlled through the PC software, and the software remote control system works, so that convenience is provided for experiment staff.
Drawings
FIG. 1 is a schematic diagram of the overall system architecture of the present utility model;
FIG. 2 is a schematic diagram of the humidity control of the test chamber;
FIG. 3 is a circuit diagram of humidity control;
FIG. 4 is a schematic diagram of nitrogen concentration control;
FIG. 5 is a schematic diagram of a flow controller circuit;
fig. 6 is a schematic diagram of a master control unit.
Detailed Description
The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Detailed description of the preferred embodiments
Summary of the principles:
as shown in fig. 1, the whole system is composed of an air compressor, a cold dryer, a nitrogen generator, a concentration proportioner, a heater, a humidifier and a computer management system. The air compressor is used for generating high-pressure air and providing the high-pressure air for the cold dryer, the cold dryer dehumidifies and removes dust, the dehumidified and dedusted dry air is divided into two paths for supplying, one path is provided for the nitrogen generator, and the other path is provided for the concentration proportioner; the nitrogen generator generates high purity nitrogen and also sends the high purity nitrogen to the concentration proportioner. The concentration proportioner controls the flow of two paths of input gases and mixes the two paths of input gases into nitrogen with specified concentration. Wherein the feedback is formed by the measurement result of the nitrogen concentration analyzer. After passing through the proportioner, the nitrogen is heated to a specified temperature by a heater and enters a test box, a humidifier is arranged in the test box, and the humidity of the test box is controlled.
Humidity control of test box
And the second controller, namely the environmental controller of the test box, is arranged in the test box and controls the humidity of the test box. The controller is provided with a Modbus RTU interface, and can receive control parameters from a PC to control the experimental process. The second principle of the controller is shown in fig. 2:
as shown in fig. 3, the humidity of the test chamber is generated by using an ultrasonic atomizer, and atomized steam is blown into the test chamber by using one gas branch to humidify the environment in the chamber. The working process of the ultrasonic atomizer is managed by a controller, and the controller drives a relay to control the on-off of the power supply of the ultrasonic atomizer.
Concentration ratio of nitrogen
As shown in fig. 4: the concentration ratio controller is responsible for controlling the concentration, flow and temperature of the nitrogen. And the MODBUS RTU protocol is adopted to communicate with the PC, and the workflow is remotely controlled. The concentration controller collects gas flow through two flow controllers, and then calculates the relation between the set concentration and the nitrogen and air flow according to an algorithm. And controlling the valve to output nitrogen with a certain concentration.
The flow controller reads the gas flow signal, converts the gas flow signal into a 0-5V analog signal, and sends the signal to an ADC interface of the MCU after the signal is processed by the sampling circuit. The input of the flow controller is 0-5V analog signal, the MCU generates 2 paths of analog signals through the double-channel DAC, and the amplified signals are used for controlling the flow. As shown in fig. 5.
Example two
Nitrogen concentration proportioning algorithm:
total nitrogen = Fn2 x T x cn2+ fairx 0.78 x T (3-2)
Total gas amount= (fn2+fairx T (3-3)
F＝Fn2+Fair (3-4)
In the formula:
nitrogen concentration ratio
Fn2- -nitrogen flow rate
T- -time
Cn2- -concentration of nitrogen
Fair air flow
F- -total flow
According to the design principle of the software for controlling the nitrogen concentration, the total flow F is known; the nitrogen concentration Cn2 is produced by a nitrogen generator and is also known;the set nitrogen concentration value is a known parameter. Thus, equations 3-6 can be derived:
as can be seen from the formulas 3-6, when the control algorithm is designed, the nitrogen concentration can be controlled only by controlling the flow of nitrogen through the nitrogen flow controller.
Example two
The air compressor generates high-pressure air and supplies the high-pressure air to the cold dryer, the cold dryer dehumidifies and removes dust from the air, the dehumidified and dedusted dry air is divided into two paths to be supplied, one path is supplied to the nitrogen making machine, and the other path is supplied to the concentration proportioner; the nitrogen making machine produces high purity nitrogen and sends the high purity nitrogen to the concentration proportioner. The concentration proportioner controls the flow of two paths of input gases and mixes the two paths of input gases into nitrogen with specified concentration. Wherein the feedback is formed by the measurement result of the nitrogen concentration analyzer. After passing through the proportioner, the nitrogen is heated to a specified temperature by a heater and enters a test box, a humidifier is arranged in the test box, and the humidity of the test box is controlled.
The specific working procedure is as follows:
compressed air of the air compressor enters a built-in cold dryer of the nitrogen generator, one path of output of the cold dryer is connected with the nitrogen generator to manufacture nitrogen, and the other path of output of the cold dryer enters a concentration proportioner to regulate the concentration of the output nitrogen.
The nitrogen produced by the nitrogen generator is mixed with air output by the cold dryer through a concentration proportioner, the concentration of the nitrogen is regulated through the concentration proportioner, and the nitrogen with the regulated concentration is output to enter a nitrogen analyzer. The nitrogen analyzer measures and outputs the nitrogen concentration, and the valve switch of the concentration proportioner is adjusted according to the concentration.
And the controller I controls the opening and closing angles of the electric valves of the concentration regulator according to the set nitrogen concentration and the measured concentration difference value, and adjusts the input air quantity to keep the nitrogen concentration in the mixed gas at a certain value.
And (3) heating gas: the controller reads the value of the temperature sensor and adjusts the temperature of the output gas by controlling the air heater.
Humidification of gas: the controller reads the humidity value of the temperature and humidity sensor, controls the humidifier and adjusts the humidity of the output gas.
The acquisition module consists of an upper computer interface, a control interface, a sensor interface and the like. The system mainly aims at acquiring information of a sensor, acquiring system flow and temperature and humidity parameters, and transmitting the parameters to a host through an RS485 interface. Meanwhile, the control command sent by the host can be received to control each module in the system. The start and stop of the nitrogen generator and the flow are controlled, the start and stop of the fan are controlled, and the heating temperature of the air heater is controlled.
And the computer runs the custom software, reads the collector data through the RS485 interface and stores the collector data to the local. The system is remotely controlled to work through software.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.
Claims (4)
1. A full-automatic multiplex condition corrodes platform, its characterized in that: the device comprises an air compressor, a cold dryer, a nitrogen generator, a concentration proportioner, a heater, a humidifier, a first controller, a second controller, a collection module and a test box;
the air compressor is communicated with a built-in cold dryer of the nitrogen generator, one output path of the cold dryer is connected with the nitrogen generator to produce nitrogen, and the other path of the cold dryer is connected with the concentration proportioner to regulate the concentration of the output nitrogen;
the concentration proportioner comprises a nitrogen flow controller and an air and flow controller; the nitrogen produced by the nitrogen generator and the air output by the cold dryer enter a corresponding nitrogen flow controller and air and flow controller to be mixed, the concentration of the nitrogen is regulated by a concentration proportioner, the nitrogen with the regulated concentration enters an air heater, and then enters a nitrogen analyzer in a test box; the nitrogen analyzer measures and outputs the nitrogen concentration, and the valve switch of the concentration proportioner is adjusted according to the concentration;
the first controller is respectively connected with the air compressor, the cold dryer, the nitrogen generator, the concentration proportioner, the nitrogen concentration meter and the air heater, and controls the opening and closing angle of the electric valve of the concentration regulator according to the set nitrogen concentration and the measured concentration difference value, and adjusts the input air quantity to keep the nitrogen concentration in the mixed gas at a certain value;
and (3) heating gas: the controller reads the value of the temperature sensor and adjusts the temperature of the output gas by controlling the air heater;
humidification of gas: the controller reads the humidity value of the temperature and humidity sensor, controls the humidifier and adjusts the humidity of the output gas;
the acquisition module comprises an upper computer interface, a control interface and a sensor interface; acquiring information of a sensor, acquiring system flow and temperature and humidity parameters, and transmitting the parameters to a host through an RS485 interface; meanwhile, the control command sent by the host can be received to control each module in the system; the start and stop of the nitrogen generator and the flow are controlled, the start and stop of the fan are controlled, and the heating temperature of the air heater is controlled.
2. The fully automated multi-operating corrosion platform of claim 1, wherein: the temperature and humidity sensor adopts an SHT30 temperature and humidity sensor, and the sensor converts acquired temperature and humidity signals into digital values and transmits the digital values to the MCU by adopting an I2C interface; when the sensor is used in a high humidity environment, the sensor is subjected to secondary packaging, and a waterproof shell is additionally arranged.
3. The fully automated multi-operating corrosion platform of claim 1, wherein: the second controller is a test box environment controller, and the test box environment controller is arranged in the test box and controls the humidity of the test box; the environmental controller of the test box is provided with a Modbus RTU interface which can receive control parameters from a PC.
4. The fully automated multi-operating corrosion platform of claim 1, wherein: the humidity of the test box adopts an ultrasonic atomizer to generate water vapor, and atomized water vapor is blown into the test box by utilizing one path of gas branch to humidify the environment in the box; the working process of the ultrasonic atomizer is managed by a controller, and the controller drives a relay to control the on-off of the power supply of the ultrasonic atomizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202320806381.7U CN220019326U (en) | 2023-04-12 | 2023-04-12 | Full-automatic multi-working-condition corrosion platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320806381.7U CN220019326U (en) | 2023-04-12 | 2023-04-12 | Full-automatic multi-working-condition corrosion platform |
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| CN220019326U true CN220019326U (en) | 2023-11-14 |
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| CN202320806381.7U Active CN220019326U (en) | 2023-04-12 | 2023-04-12 | Full-automatic multi-working-condition corrosion platform |
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