CN112783029B - Atmosphere control system and method and remote monitoring system - Google Patents
Atmosphere control system and method and remote monitoring system Download PDFInfo
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- CN112783029B CN112783029B CN202011606143.9A CN202011606143A CN112783029B CN 112783029 B CN112783029 B CN 112783029B CN 202011606143 A CN202011606143 A CN 202011606143A CN 112783029 B CN112783029 B CN 112783029B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24024—Safety, surveillance
Abstract
The invention discloses an atmosphere control system, an atmosphere control method and a remote monitoring system, wherein the atmosphere control system comprises a gas multi-element co-permeation furnace, an ammonia gas supply device connected with the gas multi-element co-permeation furnace, a permeation agent device connected with the gas multi-element co-permeation furnace and a control terminal respectively connected with the permeation agent device and the ammonia gas supply device; the impregnation agent device comprises an impregnation agent tank, an impregnation agent storage component, a heating component and an air distribution component. The atmosphere control system, the atmosphere control method and the remote monitoring system provided by the invention can realize the anticorrosive treatment of the workpiece in a pollution-free environment, replace some pollution-containing anticorrosive technologies (such as electroplating, hot galvanizing and the like) at present, can realize full-automatic work only by setting working parameters, record the parameters formed in the working process, and simultaneously can adjust the parameters in real time to improve the anticorrosive effect.
Description
Technical Field
The invention relates to the field of corrosion prevention, in particular to an atmosphere control system, an atmosphere control method and a remote monitoring system.
Background
It is known that metallic materials corrode at different rates in different natural environments. For example, in marine environments, steel materials corrode very rapidly. It is counted that the economic loss caused by the corrosion of metal materials accounts for about 4 percent of GDP every year in various countries. Therefore, the metal material corrosion prevention technology can generate great economic benefits. The gas multicomponent co-permeation anticorrosive technology is that the workpiece to be treated is heated in a special sealed apparatus to certain temperature and then ammonia gas and other element containing gas are introduced. Other elements adopt liquid penetrant, and the liquid penetrant is changed into gas by an atmosphere generating device and then enters the furnace body (the heating temperature and the types of introduced substances are determined according to the performance requirements of different parts). The gas multicomponent co-permeation is characterized by no environmental pollution. At the treatment temperature, the ammonia gas decomposes to generate N atoms, and the gas substance generated by the liquid penetrating agent decomposes to generate a plurality of active atoms to penetrate into the surface of the workpiece. Forming an intermetallic compound diffusion layer containing a plurality of elements on the surface of the workpiece. The infiltrated layer is fused with the matrix, and the infiltrated layer can not fall off. The composition and structure of the compound layer can be adjusted by adjusting the types and contents of elements in the substance and performing composite treatment, so that the requirements of different properties are met. Therefore, how to perform effective atmosphere control will determine the quality of the anticorrosion effect.
Disclosure of Invention
Aiming at the defects in the prior art, the atmosphere control system, the atmosphere control method and the remote monitoring system provided by the invention can effectively prevent the workpiece to be processed from being corroded.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
providing an atmosphere control system, which comprises a gas multi-element co-permeation furnace, an ammonia gas supply device connected with the gas multi-element co-permeation furnace, a permeation agent device connected with the gas multi-element co-permeation furnace, and a control terminal respectively connected with the permeation agent device and the ammonia gas supply device; the impregnation agent device comprises an impregnation agent tank, an impregnation agent storage component, a heating component and an air distribution component;
the control terminal comprises a gas mass flow control valve arranged between the air distribution part and the permeating agent tank, a temperature controller connected with the heating part, and a fourth valve arranged between the gas multi-element co-permeation furnace and the ammonia gas supply device; the fourth valve is connected with an ammonia flow controller, and the gas mass flow control valve is connected with an air flow controller; the ammonia flow controller, the air flow controller and the temperature controller are respectively connected with an industrial controller, and the industrial controller is connected with a display; the industrial control machine comprises an ammonia flow control module, an air flow control module and a temperature control module;
the ammonia flow control module is connected with the ammonia flow controller and used for setting and adjusting the ammonia flow;
the air flow control module is connected with the air flow controller and used for setting and adjusting the air flow;
and the temperature control module is connected with the temperature controller and is used for setting and adjusting the temperature in the permeating agent tank.
Furthermore, a material rack for placing a workpiece to be processed is arranged in the gas multi-element co-permeation furnace, a first heater and a fan are also arranged in the gas multi-element co-permeation furnace, and an exhaust pipe is also arranged on the gas multi-element co-permeation furnace; the fan is connected with a motor arranged outside the gas multi-element co-permeation furnace.
Further, the ammonia gas supply device comprises an ammonia gas bottle, and the ammonia gas bottle is connected with the gas multi-element co-permeation furnace through a first gas inlet pipe; the first air inlet pipe is sequentially provided with a third valve, a flow sensor, a fourth valve and a first valve; the flow sensor and the fourth valve are respectively connected with the ammonia flow controller.
Further, the permeating agent storage component comprises a storage tank, and the storage tank is connected with the permeating agent tank through a water pump; a float switch is arranged in the seeping agent tank, an output line of the float switch is connected with a live wire of a control coil of the relay in series, and a terminal connecting line of the relay is connected with a live wire of the water pump in series.
Further, the heating part comprises a second heater and an electric heating resistor which are arranged in the impregnation agent tank, the second heater is connected with a solid-state relay, and the solid-state relay and the electric heating resistor are respectively connected with a temperature controller.
Further, the air distribution part comprises an air compressor, and a pressure gauge and a fifth valve are sequentially arranged on a pipeline connecting the air compressor and the impregnation agent tank; and the gas mass flow control valve is arranged between the fifth valve and the permeating agent tank.
Further, the permeating agent tank is connected with the gas multi-element co-permeation furnace through a second gas inlet pipe; and a second valve is arranged on the second air inlet pipe.
There is provided an atmosphere control method comprising the steps of:
s1, setting the reaction temperature in the gas multi-element co-permeation furnace, the heat preservation time in the gas multi-element co-permeation furnace, the flow rate entering the gas multi-element co-permeation furnace, the ammonia gas flow rate and the temperature of the permeation agent, and setting the air flow rate according to the flow rate entering the gas multi-element co-permeation furnace and the temperature of the permeation agent;
s2, starting a water pump to add the penetrant into the penetrant tank, and monitoring the liquid level in the penetrant tank in real time through a float switch and a relay;
s3, starting a second heater to heat the penetrant in the penetrant tank, enabling the temperature of the penetrant to reach a preset value, simultaneously acquiring the temperature of the penetrant in real time through an electrothermal resistor, and controlling the heating progress of the second heater in real time through a temperature controller;
s4, adjusting the pressure of the gas provided by the fifth valve control air compressor, and simultaneously controlling the air flow in real time through the gas mass flow control valve and the air flow controller;
s5, opening a second valve to send the gas in the permeating agent tank into the gas multi-component co-permeation furnace; opening a first valve and a third valve to communicate an ammonia cylinder and a gas multi-element co-permeation furnace, obtaining the flow of ammonia gas in real time through a flow sensor, and controlling the flow of ammonia gas in real time through a fourth valve and an ammonia gas flow controller;
s6, starting a motor to drive a fan to mix ammonia gas and gas from a penetrant tank; starting a first heater to heat the temperature in the gas multi-element co-permeation furnace to a set temperature, and maintaining the temperature in the gas multi-element co-permeation furnace until the heat preservation time is finished;
and S7, judging whether to continue atmosphere control, if so, returning to the step S1, and if not, closing the fifth valve, the solid-state relay, the water pump, the second valve, the first valve, the fourth valve and the third valve to finish atmosphere control.
Further, the method for setting the air flow rate according to the flow rate entering the gas multi-component co-infiltration furnace and the temperature of the infiltration agent in the step S1 comprises the following steps:
according to the formula:
setting an air flow K; wherein W is the flow entering the gas multi-element cementation furnace; t is the temperature of the penetrant.
The mobile terminal is used for acquiring the working data of the air flow controller, the working data of the temperature controller and the working data of the ammonia flow controller in real time through the industrial controller, and setting the reaction temperature in the gas multi-element co-infiltration furnace, the heat preservation time in the gas multi-element co-infiltration furnace, the flow entering the gas multi-element co-infiltration furnace, the ammonia flow, the air flow and the temperature of an infiltration agent.
The invention has the beneficial effects that: the atmosphere control system, the atmosphere control method and the remote monitoring system provided by the invention can realize the anticorrosive treatment of the workpiece in a pollution-free environment, replace some pollution-free anticorrosive technologies (such as electroplating, hot galvanizing and the like) at present, realize full-automatic work only by setting working parameters, record the parameters formed in the working process, and simultaneously adjust the parameters in real time to improve the anticorrosive effect.
Drawings
FIG. 1 is a schematic view of the structure of the atmosphere control device;
FIG. 2 is an exemplary diagram of a remote monitoring system deployed on a factory floor;
FIG. 3 is a schematic diagram of an interface for data entry of a tablet computer;
fig. 4 and 5 are schematic interface diagrams of the mobile terminal.
Wherein: 1. a gas multi-component co-permeation furnace; 2. a material rack; 3. a workpiece to be processed; 4. a first heater; 5. a fan; 6. an exhaust pipe; 7. a first intake pipe; 8. a first valve; 9. a second intake pipe; 10. a second valve; 11. an ammonia bottle; 12. a third valve; 13. a flow sensor; 14. a fourth valve; 15. an ammonia gas flow controller; 16. an air compressor; 17. a pressure gauge; 18. a fifth valve; 19. a gas mass flow control valve; 20. an air flow controller; 21. a penetrant tank; 22. a second heater; 23. a float switch; 24. a relay; 25. a water pump; 26. storing the tank; 27. an electric resistance; 28. a solid state relay; 29. a temperature controller; 30. a display; 31. an industrial control machine; 32. an electric motor.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1, the atmosphere control system comprises a gas multi-element co-infiltration furnace 1, an ammonia gas supply device connected with the gas multi-element co-infiltration furnace 1, an infiltration agent device connected with the gas multi-element co-infiltration furnace 1, and a control terminal respectively connected with the infiltration agent device and the ammonia gas supply device; the permeating agent device comprises a permeating agent tank 21, a permeating agent storage component, a heating component and an air distribution component;
a control terminal comprising a gas mass flow control valve 19 arranged between the air distribution part and the impregnation agent tank 21, a temperature controller 29 connected with the heating part, and a fourth valve 14 arranged between the gas multi-element cementation furnace 1 and the ammonia gas supply device; the fourth valve 14 is connected with the ammonia flow controller 15, and the gas mass flow control valve 19 is connected with the air flow controller 20; the ammonia flow controller 15, the air flow controller 20 and the temperature controller 29 are respectively connected with an industrial controller 31, and the industrial controller 31 is connected with a display 30; the industrial controller 31 comprises an ammonia flow control module, an air flow control module and a temperature control module;
the ammonia flow control module is connected with the ammonia flow controller 15 and used for setting and adjusting the ammonia flow;
an air flow control module connected with the air flow controller 20 for setting and adjusting the air flow;
and the temperature control module is connected with the temperature controller 29 and is used for setting and adjusting the temperature in the impregnation agent tank 21.
A material rack 2 for placing a workpiece 3 to be processed is arranged in the gas multi-element co-permeation furnace 1, a first heater 4 and a fan 5 are also arranged in the gas multi-element co-permeation furnace 1, and an exhaust pipe 6 is also arranged on the gas multi-element co-permeation furnace 1; the fan 5 is connected with a motor 32 arranged outside the gas multicomponent cementation furnace 1.
The ammonia gas supply device comprises an ammonia gas bottle 11, and the ammonia gas bottle 11 is connected with the gas multi-component co-permeation furnace 1 through a first gas inlet pipe 7; the first air inlet pipe 7 is sequentially provided with a third valve 12, a flow sensor 13, a fourth valve 14 and a first valve 8; the flow sensor 13 and the fourth valve 14 are connected to an ammonia flow controller 15, respectively.
The permeating agent storage component comprises a storage tank 26, and the storage tank 26 is connected with the permeating agent tank 21 through a water pump 25; a float switch 23 is arranged in the seeping agent tank 21, an output line of the float switch 23 is connected with a live wire of a control coil of the relay 24 in series, and a terminal connecting line of the relay 24 is connected with a live wire of the water pump 25 in series.
The heating components comprise a second heater 22 and a heating resistor 27 which are arranged in the impregnation agent tank 21, the second heater 22 is connected with a solid-state relay 28, and the solid-state relay 28 and the heating resistor 27 are respectively connected with a temperature controller 29.
The air distribution component comprises an air compressor 16, and a pressure gauge 17 and a fifth valve 18 are sequentially arranged on a pipeline connecting the air compressor 16 and the impregnation agent tank 21; a gas mass flow control valve 19 is arranged between the fifth valve 18 and an impregnation agent tank 21.
The permeating agent tank 21 is connected with the gas multi-component co-permeation furnace 1 through a second gas inlet pipe 9; a second valve 10 is arranged in the second inlet pipe 9.
The atmosphere control method comprises the following steps:
s1, setting the reaction temperature in the gas multi-element co-infiltration furnace 1, the heat preservation time in the gas multi-element co-infiltration furnace 1, the flow rate entering the gas multi-element co-infiltration furnace 1, the ammonia gas flow rate and the temperature of the infiltration agent, and setting the air flow rate according to the flow rate entering the gas multi-element co-infiltration furnace 1 and the temperature of the infiltration agent;
s2, starting the water pump 25 to add the penetrant into the penetrant tank 21, and monitoring the liquid level in the penetrant tank 21 in real time through the float switch 23 and the relay 24;
s3, starting the second heater 22 to heat the penetrant in the penetrant tank 21 to enable the temperature of the penetrant to reach a preset value, and simultaneously acquiring the temperature of the penetrant in real time through the electric heating resistor 27 and controlling the heating progress of the second heater 22 in real time through the temperature controller 29;
s4, adjusting the fifth valve 18 to control the gas pressure provided by the air compressor 16, and simultaneously controlling the air flow in real time through the gas mass flow control valve 19 and the air flow controller 20;
s5, opening the second valve 10 to send the gas in the permeating agent tank 21 into the gas multi-component co-permeation furnace 1; opening a first valve 8 and a third valve 12 to communicate an ammonia bottle 11 and a gas multi-component co-permeation furnace 1, obtaining the flow of ammonia in real time through a flow sensor 13, and controlling the flow of ammonia in real time through a fourth valve 14 and an ammonia flow controller 15;
s6, starting the motor 32 to drive the fan 5 to mix the ammonia gas and the gas from the impregnation agent tank 21; starting a first heater 4 to heat the temperature in the gas multi-component cementation furnace 1 to a set temperature, and maintaining the temperature in the gas multi-component cementation furnace 1 until the heat preservation time is over;
and S7, judging whether to continue atmosphere control, if so, returning to the step S1, and if not, closing the fifth valve 18, the solid-state relay 28, the water pump 25, the second valve 10, the first valve 8, the fourth valve 14 and the third valve 12 to finish atmosphere control.
The method for setting the air flow according to the flow entering the gas multicomponent cementation furnace 1 and the cementation agent temperature in the step S1 comprises the following steps: according to the formula:
setting an air flow K; wherein W is the flow entering the gas multicomponent cementation furnace 1; t is the temperature of the penetrant.
The remote monitoring system comprises a mobile terminal connected with an industrial controller 31, wherein the mobile terminal is used for acquiring the working data of the air flow controller 20, the working data of the temperature controller 29 and the working data of the ammonia flow controller 15 in real time through the industrial controller 31, and setting the reaction temperature in the gas multi-element co-infiltration furnace 1, the heat preservation time in the gas multi-element co-infiltration furnace 1, the flow entering the gas multi-element co-infiltration furnace 1, the ammonia flow, the air flow and the temperature of an infiltration agent.
In one embodiment of the present invention, a temperature value is set in the temperature control module, the thermal resistor 27 measures the temperature of the liquid penetrant, and a signal is fed back to the temperature controller 29 and then fed back to the industrial controller 31, the actual temperature of the liquid is lower than the set temperature, the industrial controller 31 makes the solid relay 28 in a state of passage through software, the power supply supplies power to the second heater 22, and the second heater 22 heats the liquid. When the actual temperature of the liquid is higher than the set temperature, the solid-state relay 28 is in an open circuit state, and the power supply stops supplying power to the second heater 22, so that the automatic control of the liquid temperature is realized. A desired ammonia gas flow rate value is set in the industrial controller 31 by the ammonia gas flow rate control module, and the value is displayed in the display 30 and the ammonia gas flow rate controller 15. And opening a third valve 12 on an ammonia bottle 11, and allowing ammonia gas to enter the gas multi-element co-infiltration furnace 1 through a flow sensor 13 for measuring the flow of the ammonia gas, a fourth valve 14 for controlling the flow of the ammonia gas, the first gas inlet pipe 7 and the first valve 8. The actual flow rate is measured by the flow sensor 13, and a signal is transmitted to the ammonia gas flow controller 15 and the industrial controller 31. If the ammonia gas flow exceeds the set value, the industrial control machine 31 controls the ammonia gas flow controller 15 to further control the fourth valve 14, so that the valve is closed to reduce the ammonia gas amount entering the multi-element furnace. If the actual flow is measured to be smaller than the set value, the industrial control machine 31 controls the ammonia flow controller 15 to further control the fourth valve 14, so that the valve is opened greatly, and the ammonia amount entering the gas multicomponent cementation furnace 1 is increased. Until the set point is reached, the fourth valve 14 stops. The actual flow value is displayed in the display 30.
The desired air flow value is set in the industrial controller 31 by the air flow control module and is displayed on the display 30 and the air flow controller 20. The fifth valve 18 is used for controlling the gas pressure provided by the air compressor 16 to be a fixed value, the gas enters the permeating agent tank 21 through the gas mass flow control valve 19, meanwhile, the gas mass flow control valve 19 realizes automatic flow regulation, the required value is reached, and the actual flow value is displayed in the air flow controller 20 and the display 30, so that the automatic control of the gas flow is realized.
When the penetrant tank 21 is filled with penetrant, under the action of buoyancy, a floating ball on the float switch 23 floats on the liquid level and is at the upper end position, at the moment, an output line of the float switch 23 is in an open circuit state, the output line is connected in series with a live wire of a control coil of the relay 24, at the moment, a terminal of the relay 24 is disconnected, a connecting line of the terminal of the relay 24 is connected in series with a live wire of the water pump 25, and therefore the water pump 25 does not work. When the liquid penetrant is exhausted, the floating ball on the float switch 23 falls down to be at the lowest position. At this time, the output line of the float switch 23 is in a communication state, and at this time, the terminal of the relay 24 is closed, so that the water pump 25 starts to work, and the liquid penetrant in the storage tank 26 is pumped into the penetrant tank 21. When the liquid permeating agent is continuously increased, the floating ball on the float switch 23 continuously rises to reach the upper end position, and the relay 24 terminal disconnects the water pump 25 to stop working. The automatic supplement of the liquid penetrant after consumption is realized.
In the specific implementation process, the performance requirements of workpieces with different purposes are different, and the parameter setting of the gas multi-component co-permeation process has great influence on the production result; the field environment parameters and the personnel operation process in the production process have important influence on the production result. The remote monitoring system aims at: and a production manager can master the field real-time data at any time to ensure the stability of the production result. Meanwhile, the remote monitoring system can store the production complete data of different batches for a long time to form a database, provide a large amount of data for process research personnel, perform statistical analysis and process simulation, and further continuously optimize the process. The exhaust gas discharged from the exhaust pipe 6 can be subjected to combustion treatment, thereby reducing environmental pollution.
The data communication host of the remote monitoring system mainly comprises an industrial control computer and a data router group. The data router has a network cable interface and a wireless transmitting function, and a plurality of routers can build a production field local area network in a bridging mode. A plurality of monitoring instruments, controllers and cameras at different point positions are connected into a production field local area network through network cables or a wireless Wifi function, and bidirectional communication of data is achieved. The industrial personal computer uploads the monitoring data received in the local area network to a network server; and meanwhile, receiving control data such as process parameter setting and the like sent by a network server, and transmitting the control data to the controller through the local area network.
In addition, a tablet personal computer can be installed in a workshop, so that a production operator can directly fill in basic information such as the starting and ending time, the process parameters and the like of the production on software; and after the production is finished, the performance of the product is measured by a professional instrument, the performance of the product in the batch is filled, and a field photo related to the production process is shot and uploaded.
A plurality of security cameras can be installed in a production field, so that all areas of the field are in the security camera shooting range. The security camera collects the field video information in real time and uploads the field video information to the network server in a video plug-flow mode. And authorized personnel can directly view the video of the production site on the remote monitoring equipment. In addition, the video stream of each production process is transcoded into a video file and is stored in a network server for a long time. Even if a major safety accident occurs on the site, accident responsibility can be traced through the complete video in the network server.
All mobile terminals in the remote monitoring system need to input user names and passwords for login before use, and a server with successful login can issue a data key file with a term to a current user of the mobile terminal; when other mobile terminals perform data adding, deleting, checking and modifying operations, the current data key file needs to be uploaded at the same time, and the data operation can take effect only after the key verification is successful; once the data key file is expired, the user name and the password are required to be input again for logging in.
As shown in fig. 4 and 5, the relevant personnel can view single production data and multiple batches of statistical data on the mobile phone. The multi-batch statistical data is obtained by summarizing multiple single production data to form a statistical chart, such as a broken line chart related to process parameters and product performance data. The single production data contains the following data in one production run:
1-the process parameters set by the production, namely the theoretical parameters received by the controller.
And 2, checking the actual temperature and gas concentration data recorded at each point of the production line at fixed time intervals in the production according to a list or a time axis line graph.
And 3, field environment data of the production, namely the temperature, the humidity and the air quality of the field environment.
4-the production result is the product performance data reported by a production operator after being monitored by a professional instrument.
As shown in fig. 2, when a remote monitoring system is deployed in a four hundred square meter production plant, an industrial wireless lan router and a wireless lan bridge may be used to deploy a wireless lan in the production plant. The industrial wireless local area network router is placed in a machine room, is in wired connection with the data communication host, transmits and receives wireless signals, and creates a wireless local area network basic channel; according to the factory layout and the thickness of the partition wall, a plurality of wireless local area network bridges are arranged and placed for transferring and amplifying wireless signals. Therefore, all the devices in the deployment environment in the wireless network can carry out bidirectional data communication with the data communication host through the Wifi link.
As shown in fig. 3, the field operator may perform the following operations by moving the tablet computer:
1) in the production process, data and photos of key nodes (charging, ventilation, discharging and the like) are uploaded;
2) after the production is finished, uploading the parameter indexes of the product after being monitored by professional equipment.
In summary, the atmosphere control system, the atmosphere control method and the remote monitoring system provided by the invention can realize the anticorrosive treatment of the workpiece without polluting environment, replace some existing pollution-free anticorrosive technologies (such as electroplating, hot galvanizing and the like), can realize full-automatic work only by setting working parameters, record the parameters formed in the working process, and simultaneously can adjust the parameters in real time to improve the anticorrosive effect.
Claims (2)
1. An atmosphere control method, characterized in that,
the atmosphere control device for realizing the atmosphere control method comprises a gas multi-element co-permeation furnace (1), an ammonia gas supply device connected with the gas multi-element co-permeation furnace (1), a permeation agent device connected with the gas multi-element co-permeation furnace (1), and a control terminal respectively connected with the permeation agent device and the ammonia gas supply device; the impregnation agent device comprises an impregnation agent tank (21), an impregnation agent storage component, a heating component and an air distribution component;
the control terminal comprises a gas mass flow control valve (19) arranged between an air distribution part and an impregnation agent tank (21), a temperature controller (29) connected with the heating part, and a fourth valve (14) arranged between the gas multi-element co-impregnation furnace (1) and the ammonia gas supply device; the fourth valve (14) is connected with an ammonia flow controller (15), and the gas mass flow control valve (19) is connected with an air flow controller (20); the ammonia flow controller (15), the air flow controller (20) and the temperature controller (29) are respectively connected with an industrial controller (31), and the industrial controller (31) is connected with a display (30); the industrial control machine (31) comprises an ammonia flow control module, an air flow control module and a temperature control module;
the ammonia flow control module is connected with the ammonia flow controller (15) and is used for setting and adjusting the ammonia flow;
the air flow control module is connected with the air flow controller (20) and is used for setting and adjusting the air flow;
the temperature control module is connected with the temperature controller (29) and is used for setting and adjusting the temperature in the permeating agent tank (21);
the permeating agent storage component comprises a storage tank (26), and the storage tank (26) is connected with the permeating agent tank (21) through a water pump (25); a float switch (23) is arranged in the seeping agent tank (21), the output line of the float switch (23) is connected with the live wire of the control coil of the relay (24) in series, and the terminal connection of the relay (24) is connected with the live wire of the water pump (25) in series;
a material rack (2) for placing a workpiece (3) to be processed is arranged in the gas multi-element co-permeation furnace (1), a first heater (4) and a fan (5) are also arranged in the gas multi-element co-permeation furnace (1), and an exhaust pipe (6) is also arranged on the gas multi-element co-permeation furnace (1); the fan (5) is connected with a motor (32) arranged outside the gas multi-element co-permeation furnace (1);
the ammonia gas supply device comprises an ammonia gas bottle (11), and the ammonia gas bottle (11) is connected with the gas multi-component cementation furnace (1) through a first gas inlet pipe (7); a third valve (12), a flow sensor (13), a fourth valve (14) and a first valve (8) are sequentially arranged on the first air inlet pipe (7); the flow sensor (13) and the fourth valve (14) are respectively connected with an ammonia flow controller (15);
the heating component comprises a second heater (22) and an electrothermal resistor (27) which are arranged in the impregnation agent tank (21), the second heater (22) is connected with a solid-state relay (28), and the solid-state relay (28) and the electrothermal resistor (27) are respectively connected with a temperature controller (29);
the air distribution component comprises an air compressor (16), and a pressure gauge (17) and a fifth valve (18) are sequentially arranged on a pipeline connecting the air compressor (16) and the impregnation agent tank (21); the gas mass flow control valve (19) is arranged between the fifth valve (18) and the permeating agent tank (21);
the penetrant tank (21) is connected with the gas multi-element co-penetration furnace (1) through a second gas inlet pipe (9); a second valve (10) is arranged on the second air inlet pipe (9);
the atmosphere control method comprises the following steps:
s1, setting the reaction temperature in the gas multi-element co-infiltration furnace (1), the heat preservation time in the gas multi-element co-infiltration furnace (1), the flow rate entering the gas multi-element co-infiltration furnace (1), the ammonia flow rate and the temperature of the infiltration agent, and setting the air flow rate according to the flow rate entering the gas multi-element co-infiltration furnace (1) and the temperature of the infiltration agent;
s2, starting a water pump (25) to add the penetrant into the penetrant tank (21), and monitoring the liquid level in the penetrant tank (21) in real time through a float switch (23) and a relay (24);
s3, starting the second heater (22) to heat the penetrant in the penetrant tank (21) to enable the temperature of the penetrant to reach a preset value, and meanwhile, acquiring the temperature of the penetrant in real time through the electric heating resistor (27) and controlling the heating progress of the second heater (22) in real time through the temperature controller (29);
s4, adjusting a fifth valve (18) to control the gas pressure provided by the air compressor (16), and simultaneously controlling the air flow in real time through a gas mass flow control valve (19) and an air flow controller (20);
s5, opening a second valve (10) to send the gas in the impregnation agent tank (21) into the gas multi-element co-impregnation furnace (1); opening a first valve (8) and a third valve (12) to communicate an ammonia gas cylinder (11) and a gas multi-element co-permeation furnace (1), acquiring the flow of ammonia gas in real time through a flow sensor (13), and controlling the flow of ammonia gas in real time through a fourth valve (14) and an ammonia gas flow controller (15);
s6, starting a motor (32) to drive a fan (5) to mix ammonia gas and gas from a penetrant tank (21); starting a first heater (4) to heat the temperature in the gas multi-element co-infiltration furnace (1) to a set temperature, and maintaining the temperature in the gas multi-element co-infiltration furnace (1) until the heat preservation time is finished;
s7, judging whether to continue atmosphere control, if so, returning to the step S1, and if not, closing the fifth valve (18), the solid-state relay (28), the water pump (25), the second valve (10), the first valve (8), the fourth valve (14) and the third valve (12) to finish atmosphere control;
the method for setting the air flow according to the flow entering the gas multi-element co-infiltration furnace and the temperature of the infiltration agent in the step S1 comprises the following steps:
according to the formula:
setting an air flow K; wherein W is the flow entering the gas multicomponent cementation furnace; t is the temperature of the penetrant.
2. A remote monitoring system using the atmosphere control method according to claim 1, comprising a mobile terminal connected to an industrial controller (31), wherein the mobile terminal is configured to obtain the operation data of the air flow controller (20), the operation data of the temperature controller (29), and the operation data of the ammonia flow controller (15) in real time through the industrial controller (31), and set the reaction temperature in the gas multi-element co-infiltration furnace (1), the soak time in the gas multi-element co-infiltration furnace (1), the flow rate into the gas multi-element co-infiltration furnace, the ammonia flow rate, the air flow rate, and the temperature of the infiltration agent.
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| CN214032668U (en) * | 2020-12-28 | 2021-08-24 | 西南交通大学 | Atmosphere control system and remote monitoring system |
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| CN2729089Y (en) * | 2004-08-02 | 2005-09-28 | 西南交通大学材料科学与工程学院 | Gas multielement common disffusion control system |
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