CN213835425U - RH dip pipe with cooling structure and RH furnace - Google Patents
RH dip pipe with cooling structure and RH furnace Download PDFInfo
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- CN213835425U CN213835425U CN202022321055.6U CN202022321055U CN213835425U CN 213835425 U CN213835425 U CN 213835425U CN 202022321055 U CN202022321055 U CN 202022321055U CN 213835425 U CN213835425 U CN 213835425U
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Abstract
The RH dip pipe with the cooling structure comprises a metal supporting pipe and a refractory material layer coated on the inner side and the outer side of the metal supporting pipe, wherein the metal supporting pipe is provided with a top side and a bottom side which are opposite in the self-axial direction, a flange used for connecting a furnace body is fixed on the top side of the metal supporting pipe, a heat dissipation section of which the outer wall is exposed to the refractory material layer is arranged below the flange of the metal supporting pipe, the periphery of the heat dissipation section is surrounded by a heat conduction piece to form a cooling channel, and a cooling medium inlet and a cooling medium outlet communicated with the cooling channel are formed in the heat conduction piece; the application still provides an RH stove, includes the furnace body and connects the RH dip pipe in the furnace body bottom, the RH dip pipe be two and all adopt take cooling structure's RH dip pipe. The application cooling structure can effectively cool the steel structure of the RH dip pipe, improves the use safety and prolongs the service life of the RH furnace.
Description
Technical Field
The application relates to the field of RH refining system equipment, in particular to an RH dip pipe with a cooling structure and an RH furnace thereof.
Background
The RH vacuum refining technology is a secondary refining technology which is simple to operate, economic and effective, has the characteristics of strong refining function, large treatment capacity, short treatment period, high cleanliness of treated molten steel and the like, and is widely applied to steel mills all over the world.
The dip pipe used by the RH furnace comprises an ascending RH dip pipe and a descending RH dip pipe, wherein the lower part of the ascending RH dip pipe is provided with an argon blowing guide pipe, the descending RH dip pipe is not provided with the argon blowing guide pipe generally, and the dip pipe consisting of the ascending RH dip pipe and the descending RH dip pipe is fixed at the lower end of the furnace body through a flange welded on the dip pipe. Because the dip pipe is soaked in molten steel for a long time, the inner wall of the dip pipe is washed by high-speed molten steel, the outer wall of the dip pipe is corroded by steel slag, the steel structure part of the dip pipe is easily deformed under the influence of high temperature, the steel structure of the dip pipe is deformed, the dip pipe and a furnace body connecting flange are easy to crack and leak gas, and the like, the bottom of the RH furnace is red, penetrates and leaks, and the like in serious cases, so that the whole service life of the RH furnace is influenced, and meanwhile, greater potential safety hazards exist, and the development of the RH vacuum smelting technology is restricted.
SUMMERY OF THE UTILITY MODEL
The application provides simple structure, simple to operate's RH dip pipe of taking cooling structure can effectively solve the dip pipe steel construction and receive the high temperature and the problem that warp.
The utility model provides a take cooling structure's RH dip pipe, include the metal support pipe and cover in the refractory material layer of the inside and outside both sides of metal support pipe, the metal support pipe has relative top side and bottom side in self axial, the top side of metal support pipe is fixed with the flange that is used for connecting the furnace body, the metal support pipe is in the below position of flange exposes the heat dissipation section on refractory material layer for the outer wall, the periphery of heat dissipation section encloses into cooling channel through heat-conducting piece, seted up on the heat-conducting piece with coolant import, the coolant export of cooling channel intercommunication.
Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.
Optionally, a pressing plate is fixed on the top surface of the refractory material layer outside the metal support tube.
Optionally, the top edge of the cross section of the cooling channel is the flange, the bottom edge of the cross section of the cooling channel is the pressing plate, the outer side of the cooling channel is the heat conducting member, and the inner side of the cooling channel is the heat dissipation section.
Optionally, the maximum height of the cross-section of the cooling channel is 95 mm.
Optionally, the cooling medium inlet and the cooling medium outlet are arranged adjacent to each other in the circumferential direction of the cooling channel.
Optionally, a baffle is disposed between the cooling medium inlet and the cooling medium outlet, and the cooling medium inlet and the cooling medium outlet are respectively located on two sides of the baffle.
Optionally, the cross-sectional area of the cooling medium inlet is larger than the cross-sectional area of the cooling medium outlet.
The application also provides an RH furnace, which comprises a furnace body and RH dip pipes connected to the bottom of the furnace body, wherein the RH dip pipes are two and adopt the RH dip pipes with the cooling structures;
one RH dip pipe is a rising RH dip pipe which is also communicated with an argon pipe, and the other RH dip pipe is a falling RH dip pipe.
Optionally, flanges of the ascending RH dip pipe and the descending RH dip pipe are respectively connected to the bottom of the furnace body by welding with a steel strip.
Optionally, the argon pipe passes through the heat conducting piece of the ascending RH dipping pipe and is communicated with the ascending RH dipping pipe after passing through the refractory material layer. The RH dip pipe of taking cooling structure of this application can effectively cool off the steel construction, prevents that the steel construction from warping and the flange joint department of dip pipe and furnace body from appearing the crack, improves the safety in utilization of RH dip pipe, prolongs the life of RH stove.
Drawings
FIG. 1 is a schematic structural view of an RH dip tube;
FIG. 2 is a partially enlarged schematic view of the RH dip tube;
FIG. 3 is a schematic view of a circumferential structure of a cooling channel;
FIG. 4 is a schematic structural view of an RH furnace;
FIG. 5 is a partially enlarged schematic view of the ascending RH dip tube;
fig. 6 is a partially enlarged schematic view of a descending RH dip tube.
The reference numerals in the figures are illustrated as follows:
1. a furnace body; 11. a bottom flange;
2. an RH dip pipe; 21. a metal support tube; 211. a heat dissipation section; 22. a layer of refractory material; 23. a flange; 24. pressing a plate; 25. a heat conductive member;
3. a cooling channel; 31. a cooling medium inlet; 32. a cooling medium outlet; 33. a baffle plate;
4. raising the RH dip pipe; 41. a flange; 411. a steel belt; 42. an argon pipe;
5. lowering the RH dip pipe; 51. a flange; 511. a steel strip.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, an RH dip pipe 2 with a cooling structure provided in an embodiment of the present application includes a metal support pipe 21 and a refractory material layer 22 coated on inner and outer sides of the metal support pipe, the metal support pipe 21 has opposite top and bottom sides in its own axial direction, a flange 23 for connecting with the furnace body 1 is fixed on the top side of the metal support pipe 21, a heat dissipation section 211 whose outer wall is exposed to the refractory material layer 22 is provided below the flange 23 of the metal support pipe 21, a cooling channel 3 is defined by the periphery of the heat dissipation section 211 through a heat conducting member 25, and a cooling medium inlet 31 and a cooling medium outlet 32 which are communicated with the cooling channel 3 are provided on the heat conducting member 25.
The RH dip pipe is an important component of the RH furnace, in order to prolong the service life of the RH dip pipe, a bracket of the RH dip pipe adopts a metal support pipe 21 which is usually a steel structure, a refractory material layer 22 on the outer side of the RH dip pipe is poured by adopting pouring materials, and the refractory material layer 22 on the inner side comprises refractory lining bricks; the RH dip pipe 2 is welded and hermetically connected with the bottom of the furnace body 1 by a flange 23, so that the RH furnace is prevented from air leakage.
In order to facilitate the welding of the top sides of the flange 23 and the metal supporting tube 21, the outer side of the heat dissipation section 211 is free of refractory materials, but the metal supporting tube 21 is easily deformed by the high temperature of molten steel, and in the serious case, the flange joint of the furnace body and the RH dip pipe is cracked to leak gas, in the embodiment, the periphery of the heat dissipation section 211 is provided with a cooling channel 3, a cooling medium is transmitted into the cooling channel 3 through a cooling medium inlet 31, the heat dissipation section 211 and even the metal supporting tube 21 are cooled due to heat exchange and heat conduction, and the cooling medium can be air, nitrogen, argon or water; the cooling medium flows around in the cooling channel 3 and exits from the cooling medium outlet 32.
In order to prevent the refractory material layer 22 outside the metal support tube 21 from leaking gas from the cooling passage 3 due to external damage, as shown in fig. 2, a pressing plate 24 is fixed to the top surface of the refractory material layer 22 outside the metal support tube 21. The pressing plate 24 is made of a steel plate material and can be hermetically welded with the bottom edge of the heat conducting member 25.
The top edge of the cross section of the cooling channel 3 is a flange 23, the bottom edge is a pressing plate 24, the outer side is a heat conducting piece 25, and the inner side is a heat dissipation section 211; the heat-conducting member 25 is a steel plate.
In order to avoid that the top surface of the cooling channel 3 is burned through during the welding of the RH dip tube 2 with the furnace body 1, the maximum height of the cross section of the cooling channel 3 is 95 mm. The cooling channel 3 is located below the flange 23, and can be directly installed without adjusting the steel structure of the RH dip pipe.
The heat-conducting member 25 surrounds the heat-radiating section 211 once, and in order to expand the cooling range, as shown in fig. 3, the cooling medium inlet 31 and the cooling medium outlet 32 are respectively arranged adjacently along the circumferential direction of the cooling passage 3.
The cooling device can input cooling medium into the cooling channel 3 from the cooling medium inlet 31, and the cooling medium takes away the heat of the metal support pipe 21 in the flowing process and flows out to the cooling medium outlet 32; in order to prevent the heat flow of the cooling medium outlet 32 from entering the cooling medium inlet 31 to affect the cooling effect, a baffle 33 is arranged between the cooling medium inlet 31 and the cooling medium outlet 32, and the cooling medium inlet 31 and the cooling medium outlet 32 are respectively positioned at two sides of the baffle 33. The height of the baffle 33 is the same as that of the cooling channel 3, and the material may be a metal plate with a certain thickness or a high temperature resistant heat insulating material.
To further enhance the cooling effect, the cross-sectional area of the cooling medium inlet 31 is larger than the cross-sectional area of the cooling medium outlet 32. The cooling medium inlet 31 and the cooling medium outlet 32 are respectively matched with the inlet pipe and the outlet pipe of the cooling device, and the pipe diameter of the outlet pipe is smaller than that of the inlet pipe, so that a certain pressure is formed at the tail end of the cooling medium outlet 32, and the cooling medium can flow out from the cooling medium outlet 32 only when reaching a certain pressure after entering, so that the detention time of the cooling medium in the cooling channel 3 can be effectively prolonged, and the cooling medium and the metal support pipe 21 can perform sufficient heat exchange.
As shown in fig. 4 to 6, the present application further provides an RH furnace, which includes a furnace body 1 and RH dip pipes connected to the bottom of the furnace body, where the RH dip pipes are two and both adopt RH dip pipes 2 with cooling structures;
one RH dip pipe is a rising RH dip pipe 4, the rising RH dip pipe 4 is also communicated with an argon pipe 42, and the other RH dip pipe is a falling RH dip pipe 5;
the furnace body 1 is provided with two groups of bottom flanges 11 which are respectively welded with the flanges 41 and the flanges 51 on the top sides of the ascending RH dip pipe 4 and the descending RH dip pipe 5 in a sealing way, so that the connection between the RH dip pipe and the furnace body 1 is realized.
In order to further seal the flange connection part of the bottom of the furnace body 1 and the RH dip pipe 2, in one embodiment, the flanges 41 and 51 of the ascending RH dip pipe 4 and the descending RH dip pipe 5 are respectively welded and connected with the bottom of the furnace body 1 through a steel belt 411 and a steel belt 511.
In the steelmaking process, the two RH dip pipes are inserted into molten steel, and after the furnace body 1 is vacuumized, the molten steel rises to the height with equal pressure difference in the two RH dip pipes; to circulate the molten steel, the argon gas pipe 42 passes through the heat conductive member 25 of the ascending RH dip pipe 4 and is communicated with the ascending RH dip after passing through the refractory material layer 22. In order to ensure the degassing effect, the number of the argon gas pipes is 12-16, and different blowing combinations are formed by adjusting the flow of the argon gas in the argon gas pipe 42 to control the flowing state of the molten steel in the vacuum process, so that the deep decarburization and the deep desulfurization of the molten steel are realized.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. The RH dip pipe with the cooling structure comprises a metal supporting pipe and refractory material layers coated on the inner side and the outer side of the metal supporting pipe, and is characterized in that the metal supporting pipe is provided with a top side and a bottom side which are opposite in the self axial direction, a flange used for connecting a furnace body is fixed on the top side of the metal supporting pipe, a heat dissipation section of which the outer wall is exposed to the refractory material layers is arranged below the flange of the metal supporting pipe, the periphery of the heat dissipation section is surrounded into a cooling channel through a heat conducting piece, and a cooling medium inlet and a cooling medium outlet which are communicated with the cooling channel are formed in the heat conducting piece.
2. The RH dip pipe with a cooling structure of claim 1, wherein a pressing plate is fixed to the top surface of the refractory material layer outside the metal support pipe.
3. The RH dip pipe with a cooling structure of claim 2, wherein a top edge of a cross section of the cooling channel is the flange, a bottom edge is the pressing plate, an outer side is the heat conducting member, and an inner side is the heat dissipating section.
4. The RH dip tube with cooling structure of claim 1, wherein a maximum height of a cross section of the cooling channel is 95 mm.
5. The RH dip pipe with a cooling structure according to claim 1, wherein the cooling medium inlet and the cooling medium outlet are arranged adjacent to each other in a circumferential direction of the cooling passage.
6. The RH dip pipe with a cooling structure according to claim 5, wherein a baffle is provided between the cooling medium inlet and the cooling medium outlet, and the cooling medium inlet and the cooling medium outlet are respectively located at two sides of the baffle.
7. The RH dip pipe with a cooling structure according to claim 5, wherein a sectional area of the cooling medium inlet is larger than a sectional area of the cooling medium outlet.
The RH furnace comprises a furnace body and RH dip pipes connected to the bottom of the furnace body, and is characterized in that the RH dip pipes are two and adopt the RH dip pipe with the cooling structure according to any one of claims 1-7;
one RH dip pipe is a rising RH dip pipe which is also communicated with an argon pipe, and the other RH dip pipe is a falling RH dip pipe.
9. The RH furnace as claimed in claim 8, wherein the flanges of the ascending RH dip pipe and the descending RH dip pipe are welded to the bottom of the furnace body by a steel band, respectively.
10. The RH furnace of claim 8, wherein the argon pipe passes through the heat-conducting member of the ascending RH dip tube and through the refractory layer to communicate with the ascending RH dip tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022321055.6U CN213835425U (en) | 2020-10-16 | 2020-10-16 | RH dip pipe with cooling structure and RH furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022321055.6U CN213835425U (en) | 2020-10-16 | 2020-10-16 | RH dip pipe with cooling structure and RH furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213835425U true CN213835425U (en) | 2021-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022321055.6U Active CN213835425U (en) | 2020-10-16 | 2020-10-16 | RH dip pipe with cooling structure and RH furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213835425U (en) |
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2020
- 2020-10-16 CN CN202022321055.6U patent/CN213835425U/en active Active
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