CN215910000U - Temperature measuring device of vacuum degassing furnace - Google Patents
Temperature measuring device of vacuum degassing furnace Download PDFInfo
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- CN215910000U CN215910000U CN202122559243.7U CN202122559243U CN215910000U CN 215910000 U CN215910000 U CN 215910000U CN 202122559243 U CN202122559243 U CN 202122559243U CN 215910000 U CN215910000 U CN 215910000U
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Abstract
The utility model relates to a temperature measuring device of vacuum degassing stove, it includes thermocouple, control end, installation component and constant temperature component, the installation component is used for connecting thermocouple and ladle lateral wall, the temperature sensing end of thermocouple extend to in the ladle with the temperature that detects molten steel and its one end that is located the ladle outside with control end electric connection, constant temperature component includes feed liquor pipe, constant temperature pipe and drain pipe, the constant temperature pipe box is established the thermocouple is located the ladle outer one and serves and its inner wall and the thermocouple outer wall forms the annular chamber that supplies the coolant liquid circulation, the feed liquor pipe with the drain pipe communicates respectively the both ends of constant temperature pipe. The application has the following effects: the constant temperature component can isolate the high temperature at the temperature sensing end of the thermocouple, reduce the influence of the high temperature on an electronic device at the other end of the thermocouple and prolong the service life of the thermocouple.
Description
Technical Field
The application relates to the field of vacuum degassing furnaces, in particular to a temperature measuring device of a vacuum degassing furnace.
Background
The gas in steel mainly contains hydrogen and nitrogen, which are dissolved in molten steel in the steel-making process and have great harm to the performance of steel. The defects of bubbles, white spots, hairlines, steel ingot rising and the like can be caused when hydrogen is separated out in the process of solidifying the molten steel. Hydrogen that is not evolved reduces the strength limit, reduction of area, elongation and impact toughness of the steel. Nitrogen causes aging embrittlement of the steel, reduces the impact toughness of the steel and causes cold embrittlement of the steel. The vacuum degassing furnace comprises a vacuum chamber, a rising pipe and a steel ladle, and can be used for removing hydrogen and nitrogen in molten steel under the vacuum condition.
The working principle of the vacuum degassing furnace is that molten steel is firstly sucked into a vacuum chamber, and then argon gas is blown into the molten steel through the side walls of two ascending pipes. The argon gas rapidly expands under the high temperature of the molten steel and the low pressure of the upper part of the vacuum chamber, so that the density of the mixture of the molten steel and the gas is continuously reduced along the height direction of the dip pipe, and the molten steel enters the vacuum chamber under the action of pressure difference generated by density difference. The gas is released from the mixture of the molten steel and the gas entering the vacuum chamber under the action of high vacuum, and meanwhile, the molten steel becomes molten steel droplets, and the molten steel droplets become smaller molten steel droplets in the process that the gas to be removed in the molten steel droplets is released into the vacuum under the action of the high vacuum, so that a very good degassing effect is achieved. The gas-released molten steel is returned to the ladle along the downcomer. After such a cycle of several times, the gas in the liquid steel can be reduced to a relatively low level.
Chinese utility model with application number CN201922026879.8 discloses a vacuum degassing furnace, which comprises a steel ladle, an argon gas inlet, a vacuum chamber, a vacuum pump, a sealing cover plate, a suction pipe, a discharge pipe, a high temperature resistant coating and a heat preservation layer, an observation hole, a heating device, an exhaust pipe and a vacuum chamber mobile device. The sealing cover plate is connected to the upper part of the steel ladle through a flange and used for sealing the steel ladle, ensuring the temperature in the steel ladle and preventing heat loss. The lower part of the vacuum chamber is connected with a suction pipe and a discharge pipe, and the suction pipe and the discharge pipe penetrate through the sealing cover plate and are inserted into molten steel in the ladle.
Generally, a vacuum degassing furnace is provided with a sensor for detecting the temperature of molten steel in a ladle, and the sensor is used for reflecting the temperature of the molten steel in real time so that an operator can degas the molten steel when the molten steel reaches a proper temperature, thereby improving the degassing efficiency of the molten steel.
In view of the above-mentioned related art, the inventors believe that electronic components in a detection piece that detects the temperature of molten steel are susceptible to high temperatures during heating of molten steel in a ladle due to the high temperature of molten steel, thereby reducing the service life of the detection piece.
SUMMERY OF THE UTILITY MODEL
In order to detect the temperature of molten steel and degas the molten steel at a proper temperature, so as to improve the degassing efficiency of the molten steel, the application provides a temperature measuring device of a vacuum degassing furnace.
The application provides a temperature measuring device of vacuum degassing stove adopts following technical scheme:
a temperature measuring device of a vacuum degassing furnace comprises a thermocouple, a monitoring end, a mounting assembly and a constant temperature assembly, wherein the mounting assembly is used for connecting the thermocouple and the side wall of a steel ladle, the temperature sensing end of the thermocouple extends into the steel ladle to detect the temperature of molten steel, one end of the thermocouple, which is positioned outside the steel ladle, is electrically connected with the monitoring end, the constant temperature assembly comprises a liquid inlet pipe, a constant temperature pipe and a liquid outlet pipe, the constant temperature pipe is sleeved on one end of the thermocouple, which is positioned outside the steel ladle, and an annular cavity for cooling liquid circulation is formed by the inner wall of the constant temperature pipe and the outer wall of the thermocouple, and the liquid inlet pipe and the liquid outlet pipe are respectively communicated with two ends of the constant temperature pipe.
By adopting the technical scheme, after the thermocouple is connected with the steel ladle through the mounting assembly, the temperature sensing end of the thermocouple can measure the temperature of molten steel in the steel ladle, after the thermocouple is sleeved with the constant temperature pipe, cooling liquid is conveyed to the constant temperature pipe from the liquid inlet pipe and then flows out of the liquid outlet pipe to form circulation of the cooling liquid, the high temperature of the temperature sensing end of the thermocouple can be isolated, the influence of the high temperature on an electronic device at the other end of the thermocouple is reduced, the service life of the thermocouple is prolonged, meanwhile, the precision in temperature detection can be improved, the thermocouple converts a temperature signal into a thermoelectromotive force signal and transmits the thermoelectromotive force signal to the monitoring end, an operator can observe the temperature of the molten steel at the monitoring end and degas the molten steel at a proper temperature, and therefore the degassing efficiency of the molten steel is improved.
Preferably, branch pipes are respectively arranged at two ends of the constant temperature pipe, the two branch pipes are respectively in threaded connection with the liquid inlet pipe and the liquid outlet pipe, the branch pipes are communicated with the liquid inlet pipe, the liquid outlet pipe and the annular cavity, and the liquid inlet pipe is connected with an infusion part.
Through adopting above-mentioned technical scheme, feed liquor pipe, drain pipe all can be through can dismantling with the realization and be connected with the constant temperature pipe with the threaded connection of branch pipe, and the infusion piece can be toward carrying the coolant liquid in the feed liquor pipe, and the coolant liquid is exported from the drain pipe after passing through the constant temperature pipe, can cool off the thermocouple and keep away from the one end of temperature-sensing end, has improved the flexibility when thermocouple is connected with the constant temperature subassembly simultaneously.
Preferably, the liquid inlet pipe and the liquid outlet pipe are both provided with flow valves.
By adopting the technical scheme, the flow of the cooling liquid in the liquid inlet pipe and the liquid outlet pipe can be adjusted by the flow valve, so that the temperature of one end of the thermocouple can be controlled by the constant-temperature pipe.
Preferably, the mounting assembly comprises a connecting pipe, the connecting pipe is in a circular pipe shape, first threads are arranged on the outer side wall of the connecting pipe, screw holes are formed in the side wall of the steel ladle, and the connecting pipe is in threaded connection with the steel ladle through the first threads and the screw holes.
By adopting the technical scheme, after one end of the thermocouple is inserted into the steel ladle, the outer side wall of the connecting pipe is provided with the first threads, and the thermocouple can be connected with the steel ladle threads through the first threads of the connecting pipe and the screw holes in the side wall of the steel ladle.
Preferably, the inner side wall of the connecting pipe is provided with second threads, the thermocouple is provided with third threads, and the connecting pipe is in threaded connection with the thermocouple through the second threads and the third threads.
Through adopting above-mentioned technical scheme, connecting pipe and thermocouple accessible second screw thread and third screw thread threaded connection, connecting pipe and thermocouple connected mode are simple, can make things convenient for the operator to connect both.
Preferably, the first thread, the second thread and the third thread are in the same direction as the thread of the screw hole.
By adopting the technical scheme, when the thermocouple is connected with the steel ladle, the connecting pipe can only be rotated and is in threaded connection with the thermocouple and the steel ladle together, so that the convenience of mounting the thermocouple is improved.
Preferably, a guide surface is arranged at one end of the connecting pipe, an included angle is formed between the guide surface and the side wall of the connecting pipe, and the guide surface inclines towards one side of the constant temperature pipe.
By adopting the technical scheme, when the connecting pipe is in threaded connection with the screw hole on the side wall of the steel ladle, the guide surface can play a role in guiding, and the convenience of the connecting pipe in connection with the steel ladle is improved.
Preferably, a rotating block is arranged at one end, far away from the thermocouple temperature sensing end, of the connecting pipe, and the rotating block is connected with the connecting pipe.
By adopting the technical scheme, when the connecting pipe is in threaded connection with the screw hole in the side wall of the steel ladle, an operator can use a tool to rotate the rotating block, so that the connecting pipe can be conveniently rotated into the screw hole, and the convenience of the connecting pipe in connection with the steel ladle is improved.
Preferably, one end of the connecting pipe, which is far away from the guide surface, is provided with a ring, the steel ladle is provided with a ring groove, the ring groove is coaxially distributed and communicated with the screw hole, one surface of the ring is connected with the rotating block, and the other surface of the ring is abutted to the ring groove.
Through adopting above-mentioned technical scheme, after connecting pipe and the complete threaded connection of ladle, the ring is pegged graft in the ring groove, and the leakproofness after connecting pipe and ladle are connected has been improved to ring and ladle lateral wall butt.
In summary, the present application includes at least one of the following beneficial technical effects:
1. after the constant temperature tube is sleeved on the thermocouple, cooling liquid is conveyed to the constant temperature tube from the liquid inlet tube and flows out from the liquid outlet tube to form circulation of the cooling liquid, so that the influence of high temperature on an electronic device at one end of the thermocouple far away from the temperature sensing end can be reduced, the service life of the thermocouple is prolonged, and the precision of temperature detection can be improved;
2. the operator can observe the temperature of the molten steel at the monitoring end and can degas the molten steel at a proper temperature, so that the degassing efficiency of the molten steel is improved;
3. the connecting pipe is rotated and is in threaded connection with the thermocouple and the steel ladle together, so that the convenience of the thermocouple in installation is improved.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.
Fig. 2 is a schematic diagram of an explosive structure according to an embodiment of the present application.
Fig. 3 is a partially enlarged schematic view at a in fig. 2.
Fig. 4 is a partial structural schematic diagram of an embodiment of the present application, mainly showing a connecting pipe.
Fig. 5 is a partially enlarged schematic view at B in fig. 2.
Description of reference numerals:
1. a ladle; 11. a screw hole; 12. a circular groove;
2. a thermocouple; 21. a third thread;
3. mounting the component; 31. a connecting pipe; 311. a first thread; 312. a second thread; 32. a guide surface; 33. rotating the block; 34. a circular ring;
4. a constant temperature component; 41. a liquid inlet pipe; 42. a thermostatic tube; 43. a liquid outlet pipe; 44. a branch pipe; 45. a flow valve;
5. and a monitoring end.
Detailed Description
The present application is described in further detail below with reference to the accompanying drawings.
The embodiment of the application discloses temperature measuring device of a vacuum degassing furnace. Referring to fig. 1 and 2, the temperature measuring device of the vacuum degassing furnace comprises a thermocouple 2, a mounting assembly 3 and a constant temperature assembly 4, wherein a temperature sensing end of the thermocouple 2 is inserted into molten steel in a steel ladle 1, the mounting assembly 3 is used for connecting the thermocouple 2 with the side wall of the steel ladle 1, the constant temperature assembly 4 can enable one end, far away from the temperature sensing end, of the thermocouple 2 to keep at a lower temperature, the high temperature of the temperature sensing end of the thermocouple 2 can be isolated, the influence of the high temperature on an electronic device of the thermocouple 2 is reduced, the service life of the thermocouple 2 can be prolonged, and meanwhile, the temperature measuring accuracy of the thermocouple 2 can be improved.
The thermocouple 2 is L-shaped, one end of the thermocouple is a temperature sensing end and extends into the steel ladle, the extension section is bent downwards and is used for being in contact with molten steel to measure temperature, and the other end of the thermocouple 2 is used for placing an electronic element and comprises a sending module. The thermocouple 2 can adopt a WRR-130 platinum rhodium sensor, the thermocouple 2 is electrically connected with a monitoring end 5, the monitoring end 5 is provided with a receiving module, the sending module and the receiving module can adopt 2.4G modules and the like, and wireless connection of the thermocouple 2 and the monitoring end 5 is realized. The thermocouple 2 detects the temperature of the molten steel and outputs a temperature signal, the temperature signal is transmitted to the monitoring end 5 through the sending module and the receiving module, and the monitoring end 5 can adopt a computer and the like and is used for collecting the temperature signal and displaying the temperature value. The operator can check the temperature of the molten steel from the monitoring terminal 5 so as to degas the molten steel at a proper temperature, thereby improving the degassing efficiency of the molten steel.
Referring to fig. 2 and 3, the constant temperature assembly 4 includes a constant temperature tube 42, a liquid inlet tube 41 and a liquid outlet tube 43, the constant temperature tube 42, the liquid inlet tube 41 and the liquid outlet tube 43 are all in a hollow round tube shape, the constant temperature tube 42 is located outside the ladle 1, the constant temperature tube 42 is sleeved on one end of the thermocouple 2 far away from the temperature sensing end and is welded and fixed with the thermocouple 2 in a sealing manner, and an annular cavity for cooling liquid circulation is formed between the inner wall of the constant temperature tube 42 and the outer wall of the thermocouple 2.
Referring to fig. 2 and 4, the mounting assembly 3 includes a connecting pipe 31, the connecting pipe 31 is in a hollow circular tube shape, the connecting pipe 31 is sleeved at one end of the thermocouple 2 far away from the temperature sensing end, a first thread 311 is arranged on the outer side wall of the connecting pipe 31, a second thread 312 is arranged on the inner side wall of the connecting pipe, a third thread 22 is arranged on the outer wall of the thermocouple 2, and the connecting pipe 31 is in threaded connection with the thermocouple 2 through the second thread 312 and the third thread 22. One end of the connecting pipe 31, which is positioned outside the ladle 1, is provided with a rotating block 33, the outer ring of the rotating block 33 is in a polygonal column shape, and the connecting pipe 31 and the rotating block 33 are coaxially distributed. One end of the connecting pipe 31 close to the rotating block 33 is provided with a circular ring 34, the inner side wall of the circular ring 34 is fixed with the outer side wall of the connecting pipe 31, the circular ring 34 is fixed with the rotating block 33, and the connecting pipe 31, the circular ring 34 and the rotating block 33 are integrally formed. The end of the connection tube 31 far from the rotation block 33 is provided with a guide surface 32, the guide surface 32 forms an included angle with the side wall of the connection tube 31, and the guide surface 32 is inclined towards the temperature sensing end of the thermocouple 2.
Referring to fig. 3 and 5, a screw hole 11 and an annular groove 12 are formed in the side wall of the ladle 1 (see fig. 1), the screw hole 11 and the annular groove 12 are coaxially distributed and communicated, and the screw directions of the first screw 311, the second screw 312 (see fig. 4), the third screw 21 and the screw hole 11 are all the same. One end of the connecting pipe 31, on which the guide surface 32 is distributed, penetrates through the circular groove 12 and is inserted into the screw hole 11, after the connecting pipe 31 is in threaded connection with the screw hole 11 through the first thread 311, the circular ring 34 is inserted into the circular groove 12, so that the sealing performance between the connecting pipe 31 and the steel ladle 1 is improved, an operator can rotate the rotating block 33 to rotate the connecting pipe 31 into the screw hole 11 to connect the thermocouple 2 and the steel ladle 1, and the installation convenience of the thermocouple 2 is improved.
The implementation principle of the temperature measuring device of the vacuum degassing furnace is as follows: an operator penetrates the temperature sensing end of the thermocouple 2 into the screw hole 11 of the ladle 1, the connecting pipe 31 is rotated into the screw hole 11 through the rotating block 33, the connecting pipe 31 is respectively in threaded connection with the thermocouple 2 and the ladle 1, the thermocouple 2 can detect the temperature of molten steel in the ladle 1, after the thermocouple 2 is sleeved with the constant temperature pipe 42, cooling liquid is conveyed to the constant temperature pipe 42 from the liquid inlet pipe 41 and then flows out from the liquid outlet pipe 43 to form circulation of the cooling liquid, the constant temperature at one end of the thermocouple 2 can improve the precision in temperature detection, meanwhile, the high temperature at the temperature sensing end of the thermocouple 2 can be isolated, the influence of the high temperature on an electronic device at the other end of the thermocouple 2 is reduced, the service life of the thermocouple 2 is prolonged, the thermocouple 2 transmits a temperature signal to the monitoring end 5 through the sending module and the receiving module, the operator can observe the temperature of the molten steel at the monitoring end 5 and degas the molten steel at a proper temperature, thereby improving the degassing efficiency of the molten steel.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. The utility model provides a temperature measuring device of vacuum degassing stove which characterized in that: the temperature control device comprises a thermocouple (2), a monitoring end (5), a mounting assembly (3) and a constant temperature assembly (4), wherein the mounting assembly (3) is used for connecting the thermocouple (2) and the side wall of a steel ladle (1), the temperature sensing end of the thermocouple (2) extends into the steel ladle (1) to detect the temperature of molten steel, one end of the thermocouple outside the steel ladle (1) is electrically connected with the monitoring end (5), the constant temperature assembly (4) comprises a liquid inlet pipe (41), a constant temperature pipe (42) and a liquid outlet pipe (43), the constant temperature pipe (42) is sleeved on one end of the thermocouple (2) outside the steel ladle (1), the inner wall of the constant temperature pipe and the outer wall of the thermocouple (2) form an annular cavity for circulation of cooling liquid, and the liquid inlet pipe (41) and the liquid outlet pipe (43) are respectively communicated with two ends of the constant temperature pipe (42).
2. The temperature measuring device of the vacuum degassing furnace according to claim 1, characterized in that: branch pipes (44) are respectively arranged at two ends of the constant temperature pipe (42), the branch pipes (44) are respectively in threaded connection with the liquid inlet pipe (41) and the liquid outlet pipe (43), the branch pipes (44) are communicated with the liquid inlet pipe (41) and the liquid outlet pipe (43) and the annular cavity, and the liquid inlet pipe (41) is connected with an infusion part.
3. The temperature measuring device of the vacuum degassing furnace according to claim 1, characterized in that: the liquid inlet pipe (41) and the liquid outlet pipe (43) are both provided with flow valves (45).
4. The temperature measuring device of the vacuum degassing furnace according to claim 1, characterized in that: the mounting assembly (3) comprises a connecting pipe (31), the connecting pipe (31) is in a circular pipe shape, first threads (311) are arranged on the outer side wall of the connecting pipe, screw holes (11) are formed in the side wall of the steel ladle (1), and the connecting pipe (31) is in threaded connection with the steel ladle (1) through the first threads (311) and the screw holes (11).
5. The temperature measuring device of the vacuum degassing furnace according to claim 4, wherein: the inner side wall of the connecting pipe (31) is provided with second threads (312), the thermocouple (2) is provided with third threads (21), and the connecting pipe (31) and the thermocouple (2) are in threaded connection with the third threads (21) through the second threads (312).
6. The temperature measuring device of the vacuum degassing furnace according to claim 5, characterized in that: the thread directions of the first thread (311), the second thread (312), the third thread (21) and the screw hole (11) are consistent.
7. The temperature measuring device of the vacuum degassing furnace according to claim 4, wherein: connecting pipe (31) one end is equipped with spigot surface (32), spigot surface (32) with connecting pipe (31) lateral wall is the contained angle, spigot surface (32) slope orientation is kept away from one side of constant temperature pipe (42).
8. The temperature measuring device of the vacuum degassing furnace according to claim 7, wherein: one end, far away from thermocouple (2) temperature sensing end, of connecting pipe (31) is equipped with turning block (33), turning block (33) with connecting pipe (31) are connected.
9. The temperature measuring device of the vacuum degassing furnace according to claim 8, wherein: one end, far away from the guide surface (32), of the connecting pipe (31) is provided with a circular ring (34), a circular ring groove (12) is formed in the steel ladle (1), the circular ring groove (12) and the screw hole (11) are coaxially distributed and communicated, one surface of the circular ring (34) is connected with the rotating block (33), and the other surface of the circular ring is abutted to the circular ring groove (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122559243.7U CN215910000U (en) | 2021-10-23 | 2021-10-23 | Temperature measuring device of vacuum degassing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122559243.7U CN215910000U (en) | 2021-10-23 | 2021-10-23 | Temperature measuring device of vacuum degassing furnace |
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| Publication Number | Publication Date |
|---|---|
| CN215910000U true CN215910000U (en) | 2022-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122559243.7U Active CN215910000U (en) | 2021-10-23 | 2021-10-23 | Temperature measuring device of vacuum degassing furnace |
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| CN (1) | CN215910000U (en) |
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2021
- 2021-10-23 CN CN202122559243.7U patent/CN215910000U/en active Active
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