CN210826235U - Bottom blowing device of steel-making furnace - Google Patents
Bottom blowing device of steel-making furnace Download PDFInfo
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- CN210826235U CN210826235U CN201921530232.2U CN201921530232U CN210826235U CN 210826235 U CN210826235 U CN 210826235U CN 201921530232 U CN201921530232 U CN 201921530232U CN 210826235 U CN210826235 U CN 210826235U
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Abstract
The utility model discloses a bottom blowing device of a steel-making furnace. The bottom blowing device of the steel making furnace comprises a main pipeline, a first branch gas bag, a plurality of branch pipelines and a plurality of gas regulators, wherein the main pipeline is communicated with a first gas source; the first gas distribution bag is provided with a gas inlet and a gas outlet, and the gas inlet is communicated with the main pipeline; one end of each branch pipeline is communicated with the gas outlet of the first gas-dividing bag, and the other end of each branch pipeline extends into the bottom of the steelmaking furnace to guide gas into the steelmaking furnace; each gas regulator is arranged on one branch pipeline and used for regulating the gas flow in each branch pipeline. Each branch pipeline is provided with a gas regulator to ensure that the gas flow in each branch pipeline is more stable, thereby ensuring that the gas pressure blown into the steelmaking furnace is more stable, reducing the splashing of molten steel in the furnace and improving the metal yield.
Description
Technical Field
The utility model relates to a steel-making furnace auxiliary assembly technical field, concretely relates to steel-making furnace bottom blowing device.
Background
In the existing converter or electric furnace, in order to stir molten iron uniformly or refine steel types of different types, molten steel is generally stirred by a bottom blowing system, namely, gas is blown into the converter from the bottom to stir the molten steel, but the flow rate of the gas blown into the steel making furnace is unstable in the existing bottom blowing system, so that the molten steel in the steel making furnace is splashed, and the yield of metal is influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, an object of the present invention is to provide a bottom blowing device for a steel making furnace, which aims to improve the problem of unstable air pressure of the bottom blowing device for the steel making furnace in order to influence the yield of steel making.
In order to achieve the above object, the utility model provides a steel-making furnace bottom blowing device, include:
the main pipeline is communicated with a first air source;
the first gas distribution bag is provided with a gas inlet and a gas outlet, and the gas inlet is communicated with the main pipeline;
one end of each branch pipeline is communicated with the gas outlet of the first gas distribution bag, and the other end of each branch pipeline extends into the bottom of the steelmaking furnace to guide gas into the steelmaking furnace; and the number of the first and second groups,
and each gas regulator is arranged on one branch pipeline and used for regulating the gas flow in each branch pipeline.
Optionally, each of the gas regulators comprises:
the first adjusting valve group comprises a valve block and a first constant flow valve connected with the valve block, and the inlet end of the first constant flow valve is communicated with the air outlet of the first air distribution bag; and the number of the first and second groups,
and the second adjusting valve group comprises a second constant flow valve, the inlet end of the second constant flow valve is communicated with the outlet end of the first constant flow valve, and the outlet end of the second constant flow valve is communicated with one of the branch pipelines.
Optionally, the first constant flow valve is provided with a plurality of, the valve block has a plurality of first inlet ports and a plurality of first ventholes, and is a plurality of the first constant flow valve corresponds a plurality of first inlet ports respectively one-to-one, and each the exit end of the first constant flow valve all is linked together with one the first venthole.
Optionally, the second constant flow valves are provided with a plurality of second constant flow valves, an inlet end of each second constant flow valve is communicated with at least one of the first air outlet holes, and outlet ends of the plurality of second constant flow valves are communicated with one of the branch pipes.
Optionally, the number of the second constant flow valves is greater than or equal to the number of the branch conduits.
Optionally, the apertures of the first air inlet holes are arranged differently.
Optionally, the apertures of the first air inlet holes are arranged in a consistent manner.
Optionally, the steel making furnace bottom blowing device further comprises a plurality of bypass pipelines, each bypass pipeline comprises a second gas distribution bag, the second gas distribution bag is communicated with a second gas source and a plurality of gas regulators, and each bypass pipeline is communicated with one branch pipeline.
Optionally, the first gas source comprises a nitrogen or argon gas component source.
Optionally, the second gas source comprises an air bleed source.
The utility model provides an among the bottom blowing device of steel-making furnace, a plurality of lateral conduits are in order to be used for leading-in to the steelmaking stove of gas, each all be provided with gas regulator on the lateral conduit to adjust and flow into each gas flow in the lateral conduit, so that each gas flow in the lateral conduit is more stable, thereby makes the gas pressure that blows in the steelmaking stove more stable, in order to reduce the splash of interior molten steel of stove, improves the metal yield.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of an embodiment of the bottom blowing apparatus for steelmaking according to the present invention;
FIG. 2 is a schematic flow diagram of the steelmaking bottom blowing apparatus of FIG. 1;
FIG. 3 is a schematic diagram of the gas regulator of FIG. 1;
FIG. 4 is a schematic structural view of the valve block of FIG. 1;
fig. 5 is a schematic view of another perspective of the valve block of fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | |
411a | A first |
| 2 | The first |
411b | A |
| 3 | Second |
412 | First |
| 4 | |
42 | Second regulating |
| 41 | First regulating |
421 | Second |
| 411 | Valve |
5 | Branch pipe |
The object of the present invention is to provide a novel and advantageous solution for the above mentioned problems.
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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if the present invention relates to a directional indication, the directional indication is only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, and if the specific posture is changed, the directional indication is changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
In the existing converter or electric furnace, in order to stir molten iron uniformly or refine steel types of different types, molten steel is generally stirred by a bottom blowing system, namely, gas is blown into the converter from the bottom to stir the molten steel, but the flow rate of the gas blown into the steel making furnace is unstable in the existing bottom blowing system, so that the molten steel in the steel making furnace is splashed, and the yield of metal is influenced.
In view of this, the utility model provides a steel-making furnace bottom-blowing device, fig. 1 to 5 are the utility model provides an embodiment of a steel-making furnace bottom-blowing device.
Referring to fig. 1 to 3, in the present embodiment, the steel making furnace bottom blowing device includes a main pipe 1, a first gas distribution bag 2, a plurality of branch pipes 5 and a plurality of gas regulators 4, wherein the main pipe 1 is communicated with a first gas source; the first gas distribution bag 2 is provided with a gas inlet and a gas outlet, and the gas inlet is communicated with the main pipeline 1; one end of each branch pipeline 5 is communicated with the gas outlet of the first gas distribution bag 2, and the other end of each branch pipeline 5 extends into the bottom of the steelmaking furnace to introduce gas into the steelmaking furnace so as to blow and stir molten steel in the steelmaking furnace; and each gas regulator 4 is disposed on one of the branch pipes 5 for regulating the gas flow rate in each branch pipe 5 so as to make the gas flow rate flowing into each branch pipe 5 uniform.
It should be noted that the main pipeline 1 is provided with a pipeline control or detection device designed with a pressure, flow, temperature detection, a pressure control valve, a filter, a check valve and other common devices, the gas in the main pipeline 1 passes through the filter to introduce the roughly filtered gas into the first gas-dividing bag 2, and the gas in the general bottom blowing device is mainly inert gas such as nitrogen or argon.
The utility model provides an among the steelmaking stove bottom blowing device, a plurality of lateral conduits 5 are in order to be used for leading-in gas to the steelmaking stove first minute gas package 2's gas outlet and a plurality of be provided with a plurality ofly between the lateral conduit 5 gas regulator 4 is followed in order to adjust first minute gas package 2 flows in each gas flow in the lateral conduit 5 is provided with one on each lateral conduit 5 gas regulator 4 to make each gas flow in the lateral conduit 5 is more stable, thereby makes the gas pressure of blowing in the steelmaking stove more stable, with the splash that reduces interior molten steel of stove, improves the metal yield.
In the present application, each gas regulator 4 includes a first regulating valve group 41 and a second regulating valve group 42, the first regulating valve group 41 includes a valve block 411 and a valve block 411, and an inlet end of the first constant flow valve 412 is communicated with an outlet of the first gas distribution bag 2; the second regulating valve group 42 is disposed between the first regulating valve group 41 and the plurality of branch pipes 5, and includes a second constant flow valve 421, an inlet end of the second constant flow valve 421 is communicated with an outlet end of the first constant flow valve 412, an outlet end of the second constant flow valve 421 is communicated with one of the branch pipes 5, so that the first constant flow valve 412 and the second constant flow valve 421 are connected in series to perform constant flow regulation twice, and the pressure of the gas flowing out through the second constant flow valve 421 is more stable.
It should be noted that the constant flow valve is an existing regulating valve, is a regulating valve with a constant flow function, is a valve formed by combining a self-operated differential pressure control device and a flow regulating device, and has the working principle that: the pressure difference control device is used for controlling and stabilizing the pressure difference between the front and the back of the flow regulating device, so that the flow passing through the valve is not changed along with the pressure difference between the front and the back of the valve after the pressure difference between the front and the back of the valve is larger than a constant flow starting value, the flow passing through a certain opening of the valve can be automatically kept constant within the range of pressure difference control, and the change of the flow can be realized only by regulating the opening of the valve and is irrelevant to the pressure difference between the front and the back.
Further, in this embodiment, referring to fig. 4 and 5, a plurality of first constant flow valves 412 are provided, the valve block 411 has a plurality of first air inlet holes 411a and a plurality of first air outlet holes 411b, the plurality of first constant flow valves 412 are respectively provided in one-to-one correspondence to the plurality of first air inlet holes 411a, an outlet end of each of the first constant flow valves 412 is communicated with one of the first air inlet holes 411a, each of the first constant flow valves 412 has a valve, the valve can open and close the first constant flow valve 412, so as to control opening and closing of each of the first air inlet holes 411a, and the plurality of first constant flow valves 412 are respectively provided in correspondence to the plurality of first air inlet holes 411 a; in this application, the opening and closing of the valve of each of the first constant flow valves 412 may be controlled by a controller, the controller is electrically connected to the plurality of valves of the first constant flow valves 412 to control the opening and closing degree of the plurality of valves of the first constant flow valves 412, and the controller controls the opening and closing of the valves, which belongs to the prior art and is not described in detail herein, but may be configured to be manually opened and closed. The first regulating valve group 41 is set to be in the form of a valve block 411, so that the manufacturing is convenient, the complex connection of pipelines can be reduced, one air inlet hole corresponds to one first constant flow valve 412, the air flow is convenient to control, the correspondence is clear, and the manual checking and the overhaul are also convenient.
In this embodiment, a plurality of first air inlet holes 411a are formed in the valve block 411, so that a first constant flow valve 412 is disposed at each air inlet hole to control the flow of air entering each first air inlet hole 411a, and the flow of air entering the first air inlet holes 411a is adjusted by adjusting the valve of the first constant flow valve 412. Obviously, the flow rates of all the first intake holes 411a may be set to be different, and may also be set to be the same. Each of the first constant flow valves 412 may control the opening degree of the valve by the controller to adjust the flow rate of the gas. Because the constant-flow valve has a constant-flow structure which is a high-precision pure mechanical structure, is not influenced by an external working air source and an electric signal, does not depend on the characteristics of an external instrument and the like, after the constant-flow valve is combined with the valve block 411 type constant-flow valve, each first air inlet can correspond to the constant-flow valve with different flow rates, and can be controlled by combination in a coding mode or manually controlled, so that the precise flow regulation in a larger range is realized, and the bottom blowing requirement of the steel-making furnace is completely met.
In this application, second constant flow valve 421 is provided with a plurality ofly, each the entrance end of second constant flow valve 421 respectively with each first venthole 411b is the intercommunication setting that corresponds, can set up to the one-to-one, one promptly venthole department is provided with a second constant flow valve 421, the quantity of second constant flow valve 421 also can be more than first venthole 411b, so that one first venthole 411b can with a plurality of second constant flow valve 421 is linked together, and is a plurality of the exit end of second constant flow valve 421 and one of them branch pipeline 5 is linked together, and is a plurality of second constant flow valve 421 can set up multiple flow in order to correspond, will first constant flow valve 412 with second constant flow valve 421 all is provided with a plurality ofly to the mode of accessible combination can realize the flow control of different scopes. For example, the flow rate of the gas flowing out from one of the first constant flow valves 412 is 1Mpa to flow into two of the second constant flow valves 421, and the flow rates of the two second constant flow valves 421 can be respectively set to be 0.2Mpa and 0.8Mpa, or 0.3Mpa and 0.7Mpa, or 0.4Mpa and 0.6Mpa, so that the regulation range of the pressure in each of the branch pipes 5 can be more precise, and different gas pressure values can be obtained by opening any two of the second constant flow valves 421, and the combination is diversified, so that the regulation range is wider.
And a gas pressure display panel is arranged on the pipeline close to the outlet end of the second constant flow valves 421, and each second constant flow valve 421 can be provided with an adjusting valve to adjust the opening and closing degree of the valve to adjust the gas flow, so that the gas pressure value in the pipeline can be observed more visually through the display panel.
Further, the number of the second constant flow valves 421 is not less than the number of the branch pipes 5, so that the regulation capability from the second constant flow valves 421 is stronger, and the larger the number of the second constant flow valves 421 is, the better is certain, to be more precise, but the manufacturing cost is increased. In this embodiment, the number of the branch pipes 5 is 6 to be evenly distributed at the bottom of the steel making furnace, and the number of the second constant flow valves 421 is at least 6 to meet the requirement of bottom blowing adjustment.
In an embodiment of the present application, the apertures of the first air inlet holes 411a are arranged in different sizes, that is, the air with different flow rates can pass through the apertures, so as to adjust the air flow rate.
Of course, in another embodiment, the sizes of the first air inlet holes 411a can be set in a consistent manner, so as to facilitate the adjustment in a unified manner, and the sizes of the first air inlet holes 411a can be set according to actual needs.
In this embodiment, the bottom blowing device of the steel making furnace further comprises a plurality of bypass pipelines, each bypass pipeline comprises a second gas distribution bag 3, the second gas distribution bag 3 is communicated with a second gas source and a plurality of gas regulators 4, and the plurality of bypass pipelines are respectively communicated with the plurality of branch pipelines 5. In the smelting process, each branch pipe 5 is likely to be blocked, and if the branch pipes are not conducted in time, accidents such as pipe explosion and the like are likely to occur, so that a bypass pipe is communicated with each branch pipe 5, the second gas distribution bag 3 is generally used for containing air, and in the normal smelting process, before any branch pipe 5 is detected to be possibly blocked, the bypass pipe can be opened to blow and conduct air in the branch pipe 5.
In this application, all install manual valve on every branch road pipeline to influence normal production (like outage etc. suddenly) under the condition that the accident appears in the production process.
In this application, the first gas source includes a nitrogen sub-gas source or an argon sub-gas source, so that it may be set according to the kind of steel. The second air source comprises an air distribution source and is mainly used for blowing in during detection ventilation or blowing when the branch pipeline 5 is blocked when the pipeline is erected.
Specifically, in this embodiment, six branch pipes 5 are taken as an example for explanation, and the whole operation principle of the steelmaking furnace bottom blowing device is as follows: nitrogen and argon are sent to a bottom blowing valve station (namely an air source), the design of a pipeline meets the switching requirement of nitrogen/argon, three (nitrogen, argon and compressed air) control main pipelines and six branch pipelines are arranged in the valve station, and each main pipeline is provided with a pressure, flow and temperature detection valve, a pressure control valve, a filter and a check valve. The main pipeline is connected with the first gas distribution bag 2 and the second gas distribution bag 3, the first gas distribution bag 2 and the second gas distribution bag 3 are connected with six branch pipes, and each branch pipe 5 is provided with a pressure, flow and digital constant-flow control valve and a bypass valve. The pipeline from the valve station is sent to the air brick at the bottom of the furnace through the rotary joint of the steel furnace. Each of the branch pipes 5 is communicated with the gas regulator 4 to regulate the gas of different flow rates through the serial communication of the first constant flow valve 412 and the second constant flow valve 421. In order to distinguish the influence of different gases on the flow meter, the flow measurement of the nitrogen or argon not only adopts an imported mass flow meter, but also carries out pressure regulating density calculation on the process, so that the control precision reaches the design requirement. The system designs the bypass branch at the same time, and an operator confirms that a certain branch pipeline 5 is blocked through system prompt and manually or automatically opens the bypass valve for purging.
The above is only the optional embodiment of the present invention, and not therefore the limit to the patent scope of the present invention, all the equivalent structures made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the patent protection scope of the present invention.
Claims (10)
1. A bottom blowing device of a steel making furnace is characterized by comprising:
the main pipeline is communicated with a first air source;
the first gas distribution bag is provided with a gas inlet and a gas outlet, and the gas inlet is communicated with the main pipeline;
one end of each branch pipeline is communicated with the gas outlet of the first gas distribution bag, and the other end of each branch pipeline extends into the bottom of the steelmaking furnace to guide gas into the steelmaking furnace; and the number of the first and second groups,
and each gas regulator is arranged on one branch pipeline and used for regulating the gas flow in each branch pipeline.
2. The steel furnace bottom blowing apparatus of claim 1, wherein each of the gas regulators comprises:
the first adjusting valve group comprises a valve block and a first constant flow valve connected with the valve block, and the inlet end of the first constant flow valve is communicated with the air outlet of the first air distribution bag; and the number of the first and second groups,
and the second adjusting valve group comprises a second constant flow valve, the inlet end of the second constant flow valve is communicated with the outlet end of the first constant flow valve, and the outlet end of the second constant flow valve is communicated with one of the branch pipelines.
3. The steel making furnace bottom blowing device according to claim 2, wherein a plurality of the first constant flow valves are provided, the valve block has a plurality of first air inlet holes and a plurality of first air outlet holes, the plurality of first constant flow valves are respectively provided in one-to-one correspondence with the plurality of first air inlet holes, and an outlet end of each of the first constant flow valves is communicated with one of the first air outlet holes.
4. The steelmaking bottom blowing apparatus as claimed in claim 3, wherein said second constant flow valves are provided in plural, an inlet end of each of said second constant flow valves being disposed in communication with at least one of said first gas outlet holes, and outlet ends of a plurality of said second constant flow valves being in communication with one of said branch pipes.
5. The steelmaking bottom blowing apparatus as set forth in claim 4, wherein the number of said second constant flow valves is greater than or equal to the number of said branch pipes.
6. The steelmaking bottom blowing apparatus as claimed in claim 3, wherein the apertures of said first inlet holes are arranged differently.
7. The steelmaking bottom blowing apparatus as claimed in claim 3, wherein the apertures of said first inlet holes are uniformly arranged.
8. The steel making furnace bottom blowing apparatus of claim 1, further comprising a plurality of bypass lines, each of the bypass lines including a second gas distribution drum communicating a second gas source and a plurality of the gas regulators, and each of the bypass lines communicating with one of the branch pipes.
9. The steel making furnace bottom blowing apparatus of claim 1, wherein the first gas source comprises a nitrogen partial gas source or an argon partial gas source.
10. The steelmaking bottom blowing apparatus of claim 8, wherein said second source of gas includes a source of separate air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921530232.2U CN210826235U (en) | 2019-09-12 | 2019-09-12 | Bottom blowing device of steel-making furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921530232.2U CN210826235U (en) | 2019-09-12 | 2019-09-12 | Bottom blowing device of steel-making furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210826235U true CN210826235U (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921530232.2U Active CN210826235U (en) | 2019-09-12 | 2019-09-12 | Bottom blowing device of steel-making furnace |
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|---|---|
| CN (1) | CN210826235U (en) |
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- 2019-09-12 CN CN201921530232.2U patent/CN210826235U/en active Active
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