CN212761101U - Self-cooled early warning air brick - Google Patents
Self-cooled early warning air brick Download PDFInfo
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- CN212761101U CN212761101U CN202021382527.2U CN202021382527U CN212761101U CN 212761101 U CN212761101 U CN 212761101U CN 202021382527 U CN202021382527 U CN 202021382527U CN 212761101 U CN212761101 U CN 212761101U
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Abstract
A self-cooled early warning air brick belongs to the technical field of air bricks. Self-cooled early warning air brick, include the air brick body and set up in the end air supply system that blows of air brick body, end air supply system is including the intake pipe that communicates in proper order, air chamber and permeability cell, self-cooled early warning air brick still includes that the part is located the inside early warning pipe of air brick body and all is located the inside self-cooling pipe of air brick body, the early warning pipe is one end open-ended structure, the open end and the early warning air supply intercommunication of early warning pipe to the open end is provided with the flow monitoring structure, the blind end of early warning pipe with the setting is hugged closely to the permeability cell, the outside that the position was hugged closely to early warning pipe blind end and permeability cell is located to the self-cooling pipe. The self-cooling early warning air brick can effectively prompt or alarm when the residual thickness of the air brick reaches the set safe residual thickness.
Description
Technical Field
The utility model relates to an air brick technical field, in particular to self-cooling early warning air brick.
Background
In the smelting process of a steel converter, an electric furnace and a steel ladle, gas is fed to the bottom of the converter, the electric furnace or the steel ladle through a bottom-blowing air brick, the gas floats in molten steel to drive the molten steel to rise, so that the molten steel is stirred, the temperature and various components of the molten steel are quickly and fully stirred uniformly and reach balance, and the method is a combined blowing and refining technology which is very dependent on steel production. The bottom blowing gas of the air brick drives the molten steel to stir, so that the air brick bears the scouring of the high-temperature molten steel on the air brick, and the erosion rate of the material at the position is faster than that of the surrounding lining brick or ladle lining of the converter and the electric furnace. When the converter, electric furnace and ladle air brick are used, the thickness of the air brick part in a high-temperature use state can be measured by an infrared thickness gauge at present, and the measured thickness is actually the residual thickness of the air brick in the state and the total thickness of metallurgical slag and other residual matters covered on the surface of the air brick, and is not only the residual thickness of the air brick; some steel mills determine whether the outer surface temperature of the converter, the electric furnace and the ladle reaches the safe use limit or not by monitoring the outer surface temperature of the converter, the electric furnace and the ladle, the furnace shell temperature is greatly influenced by the continuity and the stability of the smelting process and the paroxysmal smelting operation, and the residual thickness of the air brick cannot be judged accurately. In general, converter, electric furnace or ladle gas permeable bricks are used continuously due to exceeding the safety limit, so that high-temperature molten steel is leaked, and safety or equipment accidents occur.
The erosion condition of the air brick in use is greatly influenced by the use environment, and a user most hopes to timely give an early warning and an alarm when the set safe residual thickness is reached. On converter, electric stove and ladle air brick, at present the most common early warning method is to add the warning pipe, seal the top of warning pipe through welding when producing the air brick promptly, lets in high-pressure gas but does not form the flow in the warning pipe during the use, when the air brick reaches the residual thickness of settlement, high temperature molten steel melts the top of warning pipe, and gas gets into the molten steel through the warning pipe, and automatic check out system sends out the police dispatch newspaper when appearing the flow. However, in the actual using process of the early warning method, because the temperature gradient exists in the body part of the gas permeable brick, the independent early warning pipe in the state of pressure and no flow is in a higher temperature as the body material, the material of the early warning pipe is basically 304 or 321 stainless steel, the performance of the independent early warning pipe changes when the temperature exceeds 800 ℃, the independent early warning pipe begins to soften when the temperature reaches about 1150 ℃, the independent early warning pipe begins to melt when the temperature exceeds 1400 ℃, the gas outlet end of the early warning pipe covered by the body material gradually goes through the softening and melting processes from the original state along with the gradual rise of the temperature, molten steel after melting flows down to the inner cavity of the softened metal pipe, the molten steel solidifies along with the reduction of the temperature, the early warning pipe is blocked by gas, and the gas cannot be blown away due to the gradual downward movement of the melting-softening-undisturbed distribution state along with the reduction of the erosion depth, and the blocked section of the outlet end cannot be removed to realize ventilation, the early warning method is not suitable for early warning in long-term use under a normal state.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that prior art exists, the utility model provides a self-cooling early warning air brick, it can indicate or report to the police effectively when the remaining thickness of air brick reaches the safe remaining thickness of settlement.
In order to realize the purpose, the technical scheme of the utility model is that:
a self-cooling early warning air brick comprises an air brick body and a bottom blowing air supply system arranged on the air brick body, wherein the bottom blowing air supply system comprises an air inlet pipe, an air chamber and an air permeable pipe which are sequentially communicated, and the self-cooling early warning air brick further comprises an early warning pipe partially positioned in the air brick body and a self-cooling pipe fully positioned in the air brick body;
the early warning pipe is of a structure with an opening at one end, the opening end of the early warning pipe is communicated with an early warning air source, and the opening end is provided with a flow monitoring structure; the closed end of the early warning pipe is closely attached to the vent pipe;
the self-cooling pipe is sleeved outside the close end of the early warning pipe and the position where the self-cooling pipe is tightly attached to the vent pipe.
Furthermore, the closed end of the early warning pipe is tightly attached to the ventilation pipe in a welding, bundling or bonding mode.
Furthermore, the height of the early warning pipe in the air brick body is equal to the safety residual thickness of the air brick.
Further, the early warning pipe passes through the air chamber, and the junction of early warning pipe and air chamber is sealed through argon arc welding and is kept apart.
Furthermore, one end of the self-cooling pipe close to the molten steel is flush with the end of the closed end of the early warning pipe.
Furthermore, the self-cooling pipe is connected with the closed end of the early warning pipe and part of the ventilation pipe inside the self-cooling pipe in a brazing or aluminum welding mode.
Preferably, the length of the self-cooling pipe is less than or equal to 500 mm.
Preferably, the self-cooling pipe is made of stainless steel or carbon steel.
Preferably, the flow monitoring structure adopts a flow meter, a flow display screen or a flow alarm.
Preferably, the air inlet pipe of the bottom blowing air supply system is communicated with a bottom blowing air source, the air chamber and the vent pipe are arranged in the air brick body, and the air of the bottom blowing air source enters the high-temperature molten steel through the air inlet pipe, the air chamber and the vent pipe in sequence.
The utility model has the advantages that:
1) the utility model relates to a bottom blowing air brick suitable for high temperature converter, electric stove, ladle in the high temperature metallurgy process, when the air brick was normally used, gas had always passed through in the permeability cell of bottom blowing air supply system, cool down early warning pipe, early warning pipe one end is sealed, only pressure has the flow in the early warning pipe after its open end was connected the early warning air supply, when the residual thickness of air brick reached setting safe residual thickness L2, molten steel fusing hugs closely the early warning pipe blind end, early warning pipe open end gas produced the flow, realize suggestion or warning, in time terminate high temperature service under the prerequisite of guaranteeing safe smelting;
2) the self-cooling pipe of the utility model is fixed with the early warning pipe and the vent pipe which are tightly attached together through brazing or other methods and filled to form a self-cooling structure, and the self-cooling pipe has good heat conductivity, so that the self-cooling pipe can avoid the deformation of the inner cavity of the vent pipe and the early warning pipe which are tightly attached together due to extrusion during high-pressure forming, and the air permeability is lost or reduced;
3) the utility model discloses a from condenser tube through brazing or other modes and permeability cell and early warning pipe welding or fixed back, increased with self-condenser tube area of contact, strengthened the cooling effect, make the early warning pipe furthest keep in the stainless steel material, performance under the low temperature state, avoid the stainless steel material to appear softening and melting under the high temperature state, only when the contact of early warning pipe blind end or expose in the molten steel, the molten steel melts the early warning pipe blind end, the early warning air supply could get into the molten steel.
Additional features and advantages of the invention will be set forth in part in the detailed description which follows.
Drawings
Fig. 1 is a schematic structural view of a self-cooling early warning air brick provided by an embodiment of the present invention;
fig. 2 is a sectional view a-a of fig. 1.
Reference numerals in the drawings of the specification include:
1-air inlet pipe, 2-air chamber, 3-vent pipe, 4-early warning pipe, 5-opening end, 6-closing end, 7-flow monitoring structure, 8-air brick body, 9-self-cooling pipe and 10-heat conducting filler.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In order to solve the problems in the prior art, as shown in fig. 1 and 2, the utility model provides a self-cooling early-warning air brick, which comprises an air brick body 8 and a bottom-blowing air supply system arranged on the air brick body 8, wherein the bottom-blowing air supply system comprises an air inlet pipe 1, an air chamber 2 and an air permeable pipe 3 which are sequentially communicated, and the self-cooling early-warning air brick further comprises an early-warning pipe 4 which is partially positioned inside the air brick body 8 and a self-cooling pipe 9 which is completely positioned inside the air brick body 8;
the early warning pipe 4 is of a structure with an opening at one end, the opening end 5 of the early warning pipe 4 is communicated with an early warning air source, and the opening end 5 is provided with a flow monitoring structure 7; the closed end 6 of the early warning pipe 4 is closely attached to the vent pipe 3;
the self-cooling pipe 9 is sleeved outside the close end 6 of the early warning pipe 4 and the position where the ventilation pipe 3 is tightly attached.
As shown in fig. 1, the gas permeable brick body 8 is made of refractory materials, such as magnesia carbon, corundum materials and the like; the outer part of the air brick can be in a structure of a cylinder, a cube, a circular truncated cone and the like, L1 is the actual thickness of the air brick, L2 is the safe residual thickness of the air brick, and L1-L2 are the using thickness of the air brick. The air inlet pipe 1 is communicated with a bottom blowing air source, the air chamber 2 and the vent pipe 3 are arranged inside the air brick body 8, and air of the bottom blowing air source enters high-temperature molten steel through the air inlet pipe 1, the air chamber 2 and the vent pipe 3 in sequence; the bottom blowing gas source and the early warning gas source are two independent gas sources and are respectively used for supplying gas to the gas supply system and the early warning pipe 4, and the gas of the gas sources can be selected according to actual work, such as argon and nitrogen; the air chamber 2 is arranged at the bottom end in the air brick body 8, and the air chamber 2 is a stainless steel closed space and is used for balancing pressure and providing stable pressure and airflow for the vent pipe 3; the permeability cell 3 is provided with a plurality ofly, and early warning pipe 4 is provided with one, and early warning pipe 4 hugs closely with one permeability cell 3 in a plurality of permeability cells 3 can. Early warning pipe 4 adopts stainless steel, and early warning pipe 4 specifically sets up to for one end open-ended structure: one end of the early warning pipe 4 is an open end 5 and is communicated with an early warning air source, the other end of the early warning pipe 4 is welded and sealed to form a closed end 6, the early warning pipe 4 only has pressure and no flow during normal use, and the early warning pipe 4 is arranged on the side face of the vent pipe 3 of the bottom blowing air supply system and closely attached to the vent pipe 3. The self-cooling pipe 9 is a metal pipe with one section of diameter being slightly larger than the sum of the diameters of the vent pipe 3 and the early-warning pipe 4, the close end 6 of the early-warning pipe 4 and the vent pipe 3 which are tightly attached together penetrate through the self-cooling pipe 9, the close end 6 of the early-warning pipe 4 and the vent pipe 3 are attached to each other and the cladding of the self-cooling pipe 9 is achieved, the bottom blowing gas of the vent pipe 3 can automatically cool the self-cooling pipe 9, the temperature of the close end 6 of the early-warning pipe 4 is reduced, the close end 6 of the early-warning pipe 4 is enabled to be at a temperature close to the vent pipe 3, the alarm pipe is not melted or softened, and the original state. When the body material of air brick erodees to the 9 tops of the self-cooling pipe of 6 tip parallel and level of the closed end of early warning pipe 4, 6 portions of the closed end of early warning pipe 4 are melted away, and the gas flow of early warning pipe 4 is monitored immediately to the flow monitoring structure 7 that the open end 5 of early warning pipe 4 set up, sends out the warning, realizes the early warning.
Preferably, the height of the early warning pipe 4 in the air brick body 8 is equal to the thickness of the safety residue of the air brick; the early warning pipe 4 penetrates through the air chamber 2, the joint of the early warning pipe 4 and the air chamber 2 is sealed and isolated through argon arc welding, because the bottom blowing air supply system and the early warning pipe 4 are mutually independent, one part of the early warning pipe 4 penetrates through the air chamber 2, the other part of the early warning pipe 4 is positioned in the air brick body 8, the closed end 6 of the early warning pipe 4 is tightly attached to the air permeable pipe 3 in a welding, bundling or bonding mode, and meanwhile, after the air permeable pipe penetrates through the cooling pipe, the hollow part is welded and fixed or filled by brazing or high-thermal-conductivity materials, so that the gas in the air permeable pipe 3 cools the early warning pipe 4, and in order to ensure the sealing performance of the air chamber 2, the joint of the early warning; the flow monitoring structure 7 positioned at the opening end 5 of the early warning pipe 4 adopts a flowmeter, a flow display screen or a flow alarm for monitoring the gas flow in the early warning pipe 4, and after the closed end 6 of the early warning pipe 4 is melted to enable the early warning pipe 4 to generate flow, the flow monitoring structure 7 monitors the gas flow and gives an alarm, and of course, the flow monitoring structure 7 can also adopt other structures as long as whether gas circulation exists in the early warning pipe 4 and the alarm can be carried out.
As shown in fig. 1 and 2, one end of the self-cooling pipe 9 close to the molten steel is flush with the end of the closed end 6 of the early warning pipe 4; the self-cooling pipe 9 is connected with the closed end 6 of the early warning pipe 4 and part of the vent pipes 3 in the self-cooling pipe 9 in a brazing or aluminum welding mode, and the heat-conducting filler 10 formed after the self-cooling pipe 9 is connected with the vent pipes 3 and the early warning pipe 4 in the self-cooling pipe in the brazing or aluminum welding mode can not only realize the fixation of the self-cooling pipe 9 and the vent pipes 3 and the early warning pipe 4, but also has good heat conductivity, and when the self-cooling pipe 9 is actually used, other modes with good heat conductivity can be adopted for welding or filling to realize the fixation and the heat conduction, and the self-cooling pipe 9 can avoid the deformation of inner cavities of the vent pipes 3 and the; the length of the self-cooling pipe 9 is less than or equal to 500mm, the self-cooling pipe 9 is made of stainless steel or carbon steel, the early warning pipe 4 and the vent pipe 3 are tightly attached together and are positioned in the self-cooling pipe 9, and the self-cooling pipe and the vent pipe are welded or filled through brazing or other high heat conduction materials.
The utility model discloses in, bottom blowing air supply system and early warning pipe 4 are two sets of systems of independently ventilating, and the bottom blowing air supply system is in the state that has pressure to have the flow always with the matching that the user required. In normal use, the bottom blowing gas supply system and the early warning pipe 4 are both supplied with gas through independent channels, wherein the gas in the bottom blowing gas supply system is supplied with high-temperature molten steel, for example, the flow rate of converter air bricks is 70Nm3Per hour, the flow rate of the air brick of the electric furnace is 1.8-3.0Nm3The continuous and continuous input gas has a cooling effect on the metal vent pipe 3 in use, the gas tightly covers the self-cooling structure formed by the vent pipe 3 and the cooling pipe of the early warning pipe 4, the temperature born by the early warning pipe 4 is close to the temperature of the vent pipe 3, the early warning pipe 4 is not melted or softened and can keep the original shape and performance of the stainless steel pipe as the vent pipe 3, the closed end 6 of the early warning pipe 4 in the state is in a welding and sealing state, the gas only has pressure and no flow, the gas in the early warning pipe 4 does not enter high-temperature molten steel, only the material of the vent brick body 8 is continuously washed and eroded by the molten steel, the gas in the early warning pipe 4 enters the molten steel after the closed end 6 of the early warning pipe 4 directly contacts the molten steel and is melted by the molten steel, the gas in the early warning gas source enters the molten steel, the flow appears in the early warning pipe 4, the flow monitoring structure 7 can prompt an alarm, and shows, high temperature service should be stopped as soon as possible.
The utility model provides a manufacturing method of self-cooled early warning air brick:
when the self-cooling early-warning air brick is manufactured, an air inlet pipe 1, an air chamber 2 and an air permeable pipe 3 of a bottom blowing air supply system are arranged in a refractory material body according to a normal production mode; and then the vent pipe 3 and the closed end 6 of the early warning pipe 4 are tightly attached together and then simultaneously penetrate through the self-cooling pipe 9, the hollow positions between the self-cooling pipe 9 and the vent pipe 3 and the early warning pipe 4 are filled and fixed by high-heat-conduction materials such as brazing and the like, the heights of the top of the self-cooling pipe 9, the end part of the closed end 6 of the early warning pipe 4 and one end of the safety residual thickness L2 close to molten steel are consistent, the early warning pipe 4 is hermetically connected with the air chamber 2, and the structure and the materials meet the requirements of the self-cooling early warning air brick after molding.
In the utility model, when the air brick is normally used, the bottom blowing air supply system has gas to pass through, the gas in the early warning pipe 4 has no flow only under pressure, the height of the end part of the closed end 6 of the early warning pipe 4 and the height of the top end of the self-cooling pipe 9 are the safe height of the air brick when in use, the early warning air source is mutually independent with the bottom blowing air source, the gas is introduced into the early warning pipe 4 from the early warning air source, the early warning pipe 4 and the air-permeable pipe 3 are positioned in the self-cooling pipe 9 and are clung to the self-cooling pipe 9, and the hollow part is filled and fixed by high-grade copper welding heat conduction materials so as to realize the; along with the air brick is gradually eroded, when the residual height reaches the safe residual thickness L2, the early warning pipe 4 is melted, the flow of the gas discharged from the closed end 6 of the early warning pipe 4 is changed from zero to flow through the flow monitoring structure 7, the air brick is prompted to reach the final service time, and the alarm is given out in a mode of manually observing the flow of the display of the flow monitoring structure 7 or the alarm of the flow monitoring structure 7.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A self-cooled early warning air brick comprises an air brick body and a bottom blowing air supply system arranged on the air brick body, wherein the bottom blowing air supply system comprises an air inlet pipe, an air chamber and an air permeable pipe which are sequentially communicated,
the self-cooling early warning air brick also comprises an early warning pipe partially positioned in the air brick body and a self-cooling pipe completely positioned in the air brick body;
the early warning pipe is of a structure with an opening at one end, the opening end of the early warning pipe is communicated with an early warning air source, and the opening end is provided with a flow monitoring structure; the closed end of the early warning pipe is closely attached to the vent pipe;
the self-cooling pipe is sleeved outside the close end of the early warning pipe and the position where the self-cooling pipe is tightly attached to the vent pipe.
2. The self-cooling early warning air brick as claimed in claim 1, wherein the closed end of the early warning pipe is closely attached to the air permeable pipe by welding, bundling or bonding.
3. The self-cooling early warning air brick as claimed in claim 1, wherein the early warning pipe is located in the air brick body at a height equal to the safety residue thickness of the air brick.
4. The self-cooling early warning air brick as claimed in claim 1, wherein the early warning pipe passes through the air chamber, and the joint of the early warning pipe and the air chamber is sealed and isolated by argon arc welding.
5. The self-cooling early warning air brick as claimed in claim 1, wherein one end of the self-cooling pipe close to the molten steel is flush with the end of the closed end of the early warning pipe.
6. The self-cooling early warning air brick as claimed in claim 1, wherein the self-cooling pipe is connected with the closed end of the early warning pipe and part of the air vent pipe inside the self-cooling pipe by brazing or aluminum welding.
7. The self-cooling early warning air brick as claimed in claim 1, wherein the length of the self-cooling pipe is less than or equal to 500 mm.
8. The self-cooling early warning air brick as claimed in claim 1, wherein the self-cooling pipe is made of stainless steel or carbon steel.
9. The self-cooling early warning air brick as claimed in claim 1, wherein the flow monitoring structure is a flow meter, a flow display screen or a flow alarm.
10. The self-cooling early warning air brick according to claim 1, wherein an air inlet pipe of the bottom blowing air supply system is communicated with a bottom blowing air source, the air chamber and the air vent pipe are arranged inside the air brick body, and air of the bottom blowing air source enters the high-temperature molten steel through the air inlet pipe, the air chamber and the air vent pipe in sequence.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021382527.2U CN212761101U (en) | 2020-07-14 | 2020-07-14 | Self-cooled early warning air brick |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021382527.2U CN212761101U (en) | 2020-07-14 | 2020-07-14 | Self-cooled early warning air brick |
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| CN212761101U true CN212761101U (en) | 2021-03-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114317895A (en) * | 2022-01-06 | 2022-04-12 | 山东钢铁股份有限公司 | RH furnace dip pipe erosion monitoring device and using method thereof |
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2020
- 2020-07-14 CN CN202021382527.2U patent/CN212761101U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114317895A (en) * | 2022-01-06 | 2022-04-12 | 山东钢铁股份有限公司 | RH furnace dip pipe erosion monitoring device and using method thereof |
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