CN210802067U - Graphite electrode protection system of high-temperature resistance furnace - Google Patents
Graphite electrode protection system of high-temperature resistance furnace Download PDFInfo
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- CN210802067U CN210802067U CN201921916190.6U CN201921916190U CN210802067U CN 210802067 U CN210802067 U CN 210802067U CN 201921916190 U CN201921916190 U CN 201921916190U CN 210802067 U CN210802067 U CN 210802067U
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Abstract
The utility model discloses a graphite electrode protection system of a high-temperature resistance furnace, which relates to the field of resistance electrodes and comprises a gas supply device and a reaction device; the reaction device comprises a closed high-temperature resistance furnace provided with a switch, the high-temperature resistance furnace is used for a container for graphite electrode reaction, and the high-temperature resistance furnace is connected with a vacuum device for extracting gas in a cavity of the high-temperature resistance furnace; gas supply installation includes gas station, solenoid valve, mass flow controller and check valve, the gas station is used for filling into protective gas, the solenoid valve is connected the gas station with between the high temperature resistance furnace, the solenoid valve with there is mass flow controller through the pipe connection between the high temperature resistance furnace, mass flow controller with be connected with the check valve between the high temperature resistance furnace. The protection system can effectively reduce the oxidation loss of the graphite electrode in a high-temperature environment and prolong the service life; meanwhile, the sealing requirement of the high-temperature resistance furnace is reduced, the power consumption of the system is reduced, and the stability of a temperature field is improved.
Description
Technical Field
The utility model relates to a resistance electrode field specifically is a high temperature resistance furnace graphite electrode protection system.
Background
The common graphite electrode starts to be oxidized at about 400 ℃, and large loss begins to appear after the temperature exceeds 800 ℃. Besides the oxidation resistance treatment of the graphite electrode, the high-temperature oxidation resistance of the graphite electrode is mainly achieved by a vacuumizing method at present. The high-temperature furnace body needs to form a sealed environment for vacuumizing, air is pumped out through a vacuum pump set and a vacuum state with certain negative pressure is kept, the air content in the furnace is reduced, and the oxidation degree of the graphite electrode is reduced. The vacuumizing method has a high requirement on the sealing performance of the high-temperature resistance furnace, high-temperature deformation air at a sealing part cannot be prevented from entering the furnace in the production process, most of protection modes such as a graphite electrode coating and the like almost fail after the temperature is 1800 ℃, the contact oxidation of the graphite electrode and the air is intensified, and the stable work of the graphite electrode is not facilitated; in addition, the vacuum pump set can take away part of heat when working all the time, thereby increasing the power consumption of the system and being not beneficial to achieving a stable temperature field; for some devices which are produced continuously for a long time and have complicated arrangement of graphite electrodes, frequent replacement is not possible.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a graphite electrode protection system of a high-temperature resistance furnace, which can effectively reduce the oxidation loss of the graphite electrode in a high-temperature environment and prolong the service life; meanwhile, the sealing requirement of the high-temperature resistance furnace is reduced, the power consumption of the system is reduced, and the stability of a temperature field is improved.
The purpose of the utility model is realized through the following technical scheme:
a graphite electrode protection system of a high-temperature resistance furnace comprises a gas supply device and a reaction device; the reaction device comprises a closed high-temperature resistance furnace provided with a switch, the high-temperature resistance furnace is used for a container for graphite electrode reaction, and the high-temperature resistance furnace is connected with a vacuum device for extracting gas in a cavity of the high-temperature resistance furnace; gas supply installation includes gas station, solenoid valve, mass flow controller and check valve, the gas station is used for filling into protective gas, the solenoid valve passes through the tube coupling the gas station with between the high temperature resistance furnace, the solenoid valve with there is mass flow controller through the tube coupling between the high temperature resistance furnace, mass flow controller with there is the check valve through the tube coupling between the high temperature resistance furnace, the high temperature resistance furnace still is connected with the vacuum apparatus who is used for extracting gaseous in the high temperature resistance furnace cavity.
By adopting the technical scheme, the reaction device in the protection system comprises a high-temperature resistance furnace serving as a container for graphite electrode reaction and a vacuum device for extracting gas in a cavity of the high-temperature resistance furnace; the gas station of the gas supply device fills inert gas into the high-temperature resistance furnace of the reaction device, the electromagnetic valve is used for controlling the inert gas filled from the gas station to enter a cavity of the high-temperature resistance furnace, and the mass flow controller and the electromagnetic valve are matched for use to form a closed-loop system for controlling the mass flow of the filled inert gas; through the check valve of tube coupling between mass flow controller and the high temperature resistance furnace, aim at prevents to fill the inert gas backward flow into the high temperature resistance furnace, lets form the pressure-fired in the cavity of high temperature resistance furnace, avoids outside air to enter into the high temperature resistance furnace in with graphite electrode takes place the reaction, effectively prevents that graphite electrode from being oxidized.
Preferably, a furnace mouth is arranged in the cavity of the high-temperature resistance furnace, and a graphite electrode for heating reaction is also arranged in the cavity of the high-temperature resistance furnace.
By adopting the technical scheme, the furnace mouth is used for conveniently putting materials required by graphite electrode reaction; graphite electrodes are used to heat the electrodes for the reaction.
Preferably, the outer wall of the high-temperature resistance furnace is provided with a pressure sensor for detecting the air pressure in the cavity of the high-temperature resistance furnace.
By adopting the technical scheme, the pressure sensor is used for detecting the air pressure in the high-temperature resistance furnace cavity, and the proper safe air pressure is conveniently controlled and adjusted.
Preferably, the vacuum device comprises a vacuum pump set, and the vacuum pump set is connected with the high-temperature resistance furnace through a pipeline.
By adopting the technical scheme, the vacuum pump set is connected with the high-temperature resistance furnace through the pipeline, and gas in the high-temperature resistance furnace cavity is extracted to ensure that the gas is ensured under a certain vacuum condition.
Preferably, a vacuum valve is connected between the vacuum pump set and the high-temperature resistance furnace through a pipeline, and a vacuum gauge is connected between the vacuum valve and the high-temperature resistance furnace through a pipeline.
By adopting the technical scheme, the vacuum valve is used for controlling the gas flow rate of the gas in the cavity of the high-temperature resistance furnace extracted by the vacuum pump set; the vacuum gauge is used for detecting the vacuum degree in the high-temperature resistance furnace cavity connected with the pipeline.
Preferably, the outer wall of the high-temperature resistance furnace is provided with a safety valve for exhausting gas.
By adopting the technical scheme, the safety valve is used for discharging gas which is filled in the high-temperature resistance furnace cavity and has increased pressure due to temperature rise and expansion.
The utility model has the advantages that:
1. the reaction device in the protection system comprises a high-temperature resistance furnace serving as a container for graphite electrode reaction and a vacuum device for extracting gas in a cavity of the high-temperature resistance furnace; the gas station of the gas supply device fills inert gas into the high-temperature resistance furnace of the reaction device, the electromagnetic valve is used for controlling the inert gas filled from the gas station to enter a cavity of the high-temperature resistance furnace, and the mass flow controller and the electromagnetic valve are matched for use to form a closed-loop system for controlling the mass flow of the filled inert gas; through the check valve of tube coupling between mass flow controller and the high temperature resistance furnace, aim at prevents to fill the inert gas backward flow into the high temperature resistance furnace, lets form the pressure-fired in the cavity of high temperature resistance furnace, avoids outside air to enter into the high temperature resistance furnace in with graphite electrode takes place the reaction, effectively prevents that graphite electrode from being oxidized.
2. The furnace mouth is used for conveniently putting materials required by graphite electrode reaction; the graphite electrode is used for heating the electrode of the reaction; the pressure sensor is used for detecting the air pressure in the high-temperature resistance furnace cavity, so that the proper safe air pressure can be conveniently controlled and adjusted; the vacuum pump set is connected with the high-temperature resistance furnace through a pipeline, and gas in a high-temperature resistance furnace cavity in the high-temperature resistance furnace cavity is extracted to ensure that the gas is in a certain vacuum condition; the vacuum valve is used for controlling the gas flow rate of the gas in the cavity of the high-temperature resistance furnace extracted by the vacuum pump set; the vacuum gauge is used for detecting the vacuum degree in the high-temperature resistance furnace cavity connected with the pipeline; the safety valve is used for discharging gas which is filled in the high-temperature resistance furnace cavity and has increased pressure due to temperature rise and expansion.
Drawings
FIG. 1 is a schematic structural view of a graphite electrode protection system of a high-temperature resistance furnace according to the present invention;
in the figure, 1-gas station, 2-electromagnetic valve, 3-mass flow controller, 4-check valve, 5-safety valve, 6-graphite electrode, 7-pressure sensor, 8-furnace mouth, 9-high temperature resistance furnace, 11-vacuum gauge, 12-vacuum valve, 13-vacuum pump group.
Detailed Description
The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.
The common electrode starts to be oxidized at about 400 ℃, and large loss begins to appear after the temperature exceeds 800 ℃. Besides the anti-oxidation treatment of the electrode, the high-temperature anti-oxidation of the electrode mainly adopts a vacuumizing method at present. The high-temperature furnace body needs to form a sealed environment for vacuumizing, air is pumped out through a vacuum pump set and is kept in a vacuum state with certain negative pressure, the air content in the furnace is reduced, and the oxidation degree of the electrode is reduced. The vacuum pumping method has high requirement on the sealing performance of the resistance furnace, high-temperature deformation air of a sealing part is difficult to avoid entering the furnace in the production process, most protection modes such as an electrode coating and the like are almost invalid after the temperature is 1800 ℃, the contact oxidation of an electrode and air is intensified, and the stable work of the electrode is not facilitated; in addition, the vacuum pump set mechanism always works to take away part of heat, so that the power consumption of the system is increased, and a stable temperature field is not easy to achieve; for some devices with long-time continuous production and complicated electrode arrangement, frequent replacement is not possible. In view of the above-mentioned problems, a graphite electrode protection system for a high-temperature resistance furnace, as shown in fig. 1, was devised.
A graphite electrode protection system of a high-temperature resistance furnace comprises a gas supply device and a reaction device; the reaction device comprises a closed high-temperature resistance furnace 9 provided with a switch, the high-temperature resistance furnace 9 is used for a container for graphite electrode reaction, and the high-temperature resistance furnace 9 is connected with a vacuum device for extracting gas in a cavity of the high-temperature resistance furnace 9; the gas supply device comprises a gas station 1, an electromagnetic valve 2, a mass flow controller 3 and a check valve 4, wherein the gas station 1 is used for charging protective gas, the electromagnetic valve 2 is connected between the gas station 1 and the high-temperature resistance furnace 9 through a pipeline, the electromagnetic valve 2 and the high-temperature resistance furnace 9 are connected through a pipeline to form the mass flow controller 3, the check valve 4 is connected between the mass flow controller 3 and the high-temperature resistance furnace 9 through a pipeline, and the high-temperature resistance furnace 9 is further connected with a vacuum device used for extracting gas in a cavity of the high-temperature resistance furnace 9. The reaction device in the protection system comprises a high-temperature resistance furnace 9 used as a container for the reaction of the graphite electrode 6 and a vacuum device used for extracting gas in a cavity of the high-temperature resistance furnace 9; the gas station 1 of the gas supply device fills inert gas into the high-temperature resistance furnace 9 of the reaction device, the electromagnetic valve 2 is used for controlling the inert gas filled from the gas station to enter a cavity of the high-temperature resistance furnace 9, and the mass flow controller 3 and the electromagnetic valve 2 are matched for use to form a closed-loop system for controlling the mass flow of the filled inert gas; check valve 4 through the tube coupling between mass flow controller 3 and the high temperature resistance furnace 9, aim at prevents to fill the inert gas backward flow to high temperature resistance furnace 9, lets form the pressure-fired in the cavity of high temperature resistance furnace 9, avoids outside air to enter into in the high temperature resistance furnace 9 and react with graphite electrode 6, prevents effectively that graphite electrode 6 from being by oxidation.
This protection system is when actually implementing, after the material that needs heating reaction is installed from the fire door 8 of high temperature resistance furnace 9, closes fire door 8 afterwards, inspects the airtight situation of fire door 8, confirms airtight indelible later under cold state operating mode start-up vacuum pump package 13, and the air vacuum apparatus in the extraction high temperature resistance furnace 9 cavity includes vacuum pump package 13, and vacuum pump package 13 passes through the pipeline and links to each other with high temperature resistance furnace 9, and vacuum pump package 13 takes out the air in the high temperature resistance furnace 9 cavity through the pipeline. The vacuum pump set 13 is connected with the high-temperature resistance furnace 9 through a pipeline, the vacuum valve 12 is connected with the high-temperature resistance furnace 9 through a pipeline, the vacuum gauge 11 is connected between the vacuum valve 12 and the high-temperature resistance furnace 9 through a pipeline, when air passes through the vacuum valve 12, the vacuum degree in the high-temperature resistance furnace 9 cavity is determined through the reading on the vacuum gauge 11, so that the flow rate of the air passing through the vacuum valve 12 can be controlled, and the vacuum degree required for heating reaction is achieved in the high-temperature resistance furnace 9 cavity. After the set value is reached, the graphite electrode 6 is controlled to start heating, the high-temperature resistance furnace 9 is provided with a temperature reading meter, the heating is slowly heated to about 380 ℃ of the temperature reading meter, meanwhile, the vacuum pump set 13 is kept to work normally, the high-temperature resistance furnace 9 is kept warm for a certain time, heating materials and volatile gas of the heat preservation layer on the inner wall of the high-temperature resistance furnace 9 are pumped out, heating and heat preservation are carried out according to the process subsequently, when the temperature reading meter reaches 1500 ℃, the vacuum pump set 13 and the vacuum valve 12 are closed, and then the gas supply device starts to be filled with inert.
Further, the charged inert gas is sent into the high-temperature resistance furnace 9 through a pipeline through the gas station 1. This protection system's air feeder still includes solenoid valve 2, and solenoid valve 2 passes through the tube coupling between gas station 1 and high temperature resistance furnace 9, has mass flow controller 3 through the tube coupling between solenoid valve 2 and the high temperature resistance furnace 9, has check valve 4 through the tube coupling between mass flow controller 3 and the high temperature resistance furnace 9. The inert gas filled from the outside is controlled by the gas station 1, then flows through the electromagnetic valve 2 through a pipeline, then passes through the mass flow controller 3 behind the electromagnetic valve 2, and finally enters the high-temperature resistance furnace 9 through the check valve 4 in an open state. When the inert gas passes through the whole gas supply device, the electromagnetic valve 2 of the gas supply device is used for controlling the inert gas filled from the gas station 1 to enter the cavity of the high-temperature resistance furnace 9, and when the inert gas in the cavity of the high-temperature resistance furnace 9 reaches a set value, the inert gas can be conveniently controlled to flow in; secondly, the mass flow controller 3 and the electromagnetic valve 2 are matched for control to form a closed-loop system for controlling the mass flow of the filled inert gas; and then the check valve 4 is connected between the mass flow controller 3 and the high-temperature resistance furnace 9 through a pipeline, so that the inert gas filled into the high-temperature resistance furnace 9 is prevented from flowing back to influence the oxidation effect of the graphite electrode 6 in the cavity of the high-temperature resistance furnace 9.
Further, as the amount of the inert gas charged increases in the cavity of the high temperature resistance furnace 9, the reading value set at the pressure sensor 7 is observed, so as to control the flow rate of the inert gas charged. The inert gas is added by the heat released by the reaction of the graphite electrode 6 in the cavity of the high-temperature resistance furnace 9, and the filled inert gas rises in pressure due to the temperature rise and expansion in the cavity of the high-temperature resistance furnace 9, so for the sake of safety, the outer wall of the high-temperature resistance furnace 9 is provided with a safety valve 5 for exhausting, and the inert gas expanded by temperature rise is automatically exhausted through the safety valve 5. At the moment, the reading of the pressure sensor 7 needs to be observed constantly so as to detect the pressure in the cavity of the high-temperature resistance furnace 9, so that pressure compensation and suspension can be carried out, micro-positive pressure is kept in the furnace, external air is prevented from entering the cavity of the high-temperature resistance furnace 9, the risk of shutdown loss caused by graphite electrode oxidation is effectively reduced, and a temperature field formed by the graphite electrode 6 in working is more stable; meanwhile, the sealing design requirement of the high-temperature resistance furnace 9 is lower than that of negative pressure vacuum sealing, and the vacuum pump set 13 does not need to work continuously in the production process, so that high-temperature gas cannot be taken away, and the reduction of system power consumption is facilitated.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (6)
1. A graphite electrode protection system of a high-temperature resistance furnace is characterized by comprising a gas supply device and a reaction device;
the reaction device comprises a closed high-temperature resistance furnace (9) provided with a switch, the high-temperature resistance furnace (9) is used for a container for graphite electrode reaction, and the high-temperature resistance furnace (9) is connected with a vacuum device for extracting gas in a cavity of the high-temperature resistance furnace (9);
gas supply installation includes gas station (1), solenoid valve (2), mass flow controller (3) and check valve (4), gas station (1) is used for filling protective gas, solenoid valve (2) are in through the tube coupling gas station (1) with between high temperature resistance furnace (9), solenoid valve (2) with there is mass flow controller (3) through the tube coupling between high temperature resistance furnace (9), mass flow controller (3) with there is check valve (4) through the tube coupling between high temperature resistance furnace (9), high temperature resistance furnace (9) still are connected with the vacuum apparatus who is used for extracting gaseous in high temperature resistance furnace (9) cavity.
2. A high-temperature resistance furnace graphite electrode protection system according to claim 1, characterized in that a furnace mouth (8) is arranged in the cavity of the high-temperature resistance furnace (9), and a graphite electrode (6) for heating reaction is further arranged in the cavity of the high-temperature resistance furnace (9).
3. A high temperature resistance furnace graphite electrode protection system according to claim 1, characterized in that the outer wall of the high temperature resistance furnace (9) is provided with a pressure sensor (7) for detecting the air pressure in the cavity of the high temperature resistance furnace (9).
4. A high temperature resistance furnace graphite electrode protection system according to claim 1, characterized in that the vacuum device comprises a vacuum pump set (13), the vacuum pump set (13) is connected with the high temperature resistance furnace (9) through a pipeline.
5. A high-temperature resistance furnace graphite electrode protection system according to claim 4, characterized in that a vacuum valve (12) is connected between the vacuum pump set (13) and the high-temperature resistance furnace (9) through a pipeline, and a vacuum gauge (11) is connected between the vacuum valve (12) and the high-temperature resistance furnace (9) through a pipeline.
6. A high temperature resistance furnace graphite electrode protection system according to claim 1, characterized in that the outer wall of the high temperature resistance furnace (9) is provided with a safety valve (5) for exhausting gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921916190.6U CN210802067U (en) | 2019-11-08 | 2019-11-08 | Graphite electrode protection system of high-temperature resistance furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921916190.6U CN210802067U (en) | 2019-11-08 | 2019-11-08 | Graphite electrode protection system of high-temperature resistance furnace |
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| Publication Number | Publication Date |
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| CN210802067U true CN210802067U (en) | 2020-06-19 |
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| CN201921916190.6U Active CN210802067U (en) | 2019-11-08 | 2019-11-08 | Graphite electrode protection system of high-temperature resistance furnace |
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