CN206484009U - A kind of protection pipe being used in molten steel tapping process - Google Patents
A kind of protection pipe being used in molten steel tapping process Download PDFInfo
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- CN206484009U CN206484009U CN201720183472.4U CN201720183472U CN206484009U CN 206484009 U CN206484009 U CN 206484009U CN 201720183472 U CN201720183472 U CN 201720183472U CN 206484009 U CN206484009 U CN 206484009U
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- molten steel
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- sleeve pipe
- pipe
- connection member
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Abstract
The utility model discloses a kind of protection pipe being used in molten steel tapping process, belong to Ferrous Metallurgy steelmaking technical field.A kind of protection pipe being used in molten steel tapping process of the present utility model; including protection sleeve pipe and connection member; the internal diameter of the protection sleeve pipe is more than the diameter of tapping hole, has gap between the inwall of protection sleeve pipe when the steel stream is flowed through protection sleeve pipe, the connection member is used to be connected with tapping hole；The cannula inlet port end of described protection sleeve pipe is connected with connection member, and constitutes the protection pipe of insertion, and steel stream flow to protection sleeve pipe by tapping hole through connection member.Protection pipe of the present utility model sets up closed steel circulation road; molten steel and air contact can effectively be completely cut off; protected during being tapped to molten steel; greatly reduce adsorbance of the molten steel to pernicious gases such as nitrogen hydrogen; there is good heat insulation effect to molten steel; and molten steel heat loss is effectively reduced, the molten steel temperature drop produced in tapping process is reduced, and then improve the quality of molten steel.
Description
Technical field
The utility model is related to Ferrous Metallurgy steelmaking technical field, is tapped more specifically to one kind for molten steel
Protection pipe in journey.
Background technology
Steel-making principle is exactly under the high temperature conditions, with the oxide of oxygen or iron excessive carbon contained in the pig iron and its
Its impurity switchs to gas or clinker and removed.Molten steel after smelting tapping external refining and continuous casting process to oxygen in steel, nitrogen, hydrogen and
The control of temperature is very strict.But, helpless to protecting just about for molten steel in tapping process, molten steel is straight in tapping process
Connect and air contact, so as to cause the pernicious gases such as substantial amounts of nitrogen hydrogen to enter molten steel, be degrading the performance of steel, be the outer essence of follow-up stove
Refining and continuous casting belt carry out pressure, and considerably increase production cost, reduce product quality.
Nitrogen is the harmful element in general steel grade, and in tapping process, exposed steel stream is directly contacted with air, so as to increase
Nitrogen content in molten steel, typically increases 10-20ppm.Because containing certain humidity in air, molten steel hydrogenation, hydrogen will also result in
White point is easily produced in steel, steel is produced hydrogen induced cracking；Reduce product quality.It is badly in need of exploitation one kind and is specifically applied to tapping
During protection pipe so as to being protected in molten steel tapping process, it is to avoid molten steel is in absorption air during tapping
Objectionable impurities.
Influence to temperature is very big, and this process probably continues 4-6 minutes, in tapping process, and steel stream is because of heat radiation, right
Flow heat dissipation, deoxidation alloying, ladle liner heat absorption etc. cause liquid steel temperature to reduce.Therefore, using alloy heating, ladle in production
Temperature drop in baking and Optimized Operation etc., reduction tapping process.But, to the heat loss through radiation produced between steel stream and air and convection current
Any measure is not taken in radiating, causes molten steel radiating serious, so as to cause molten steel temperature drop to be difficult to effective control.
Find, in casting process, molten steel is protected using protection pipe, such as through retrieval：The title of innovation and creation
For：Compound molten-steel protection casing tube (the patent No.：ZL99229239.5, the applying date：1999-08-20), the title of innovation and creation
For：It is a kind of be used for pouring molten steel when anti-nitrogen pick-up protection pipe (number of patent application：ZL201520734792.5, the applying date：2015-
09-22).But this protection pipe is but difficult to protect molten steel in tapping process.
In addition, innovation and creation is entitled：It is a kind of to prevent the method (patent application of molten steel nitrogen pick-up in converter tapping process
Number：201010588760.0, the applying date：2010-12-15), take before converter tapping and in tapping process, during control Argon
Between and argon flow amount, be divided to two sections or argon gas be uninterruptedly blown into ladle, until tapping terminate.So that in ladle
The argon gas discharge that air is blown into, prevents tapping from, to the molten steel and air contact in ladle, the molten steel in ladle is in all the time
Argon gas guard mode, the nitrogen pick-up for both having prevented molten steel from being caused with air contact, while making easily to adsorb in bubble surface in molten steel
[N] can be discharged and be removed with the floating of Argon Bubble.Although this method can prevent molten steel nitrogen pick-up to a certain extent,
It is but to be difficult in tapping process protect molten steel.
Utility model content
1. the utility model technical problem to be solved
The purpose of this utility model is to overcome to be difficult to protect steel stream in molten steel tapping process in the prior art, is carried
For a kind of protection pipe being used in molten steel tapping process, molten steel can be protected in tapping process, reduce molten steel to nitrogen
The adsorbance of the pernicious gases such as hydrogen；Further, while molten steel heat loss can be reduced.
2. technical scheme
To reach above-mentioned purpose, the technical scheme that the utility model is provided is：
A kind of protection pipe being used in molten steel tapping process of the present utility model, including protection sleeve pipe, the protection sleeve pipe
Internal diameter is more than the diameter of tapping hole, has gap between the inwall of protection sleeve pipe when the steel stream is flowed through protection sleeve pipe；Connecting portion
Part, the connection member is used to be connected with tapping hole；The cannula inlet port end of described protection sleeve pipe is connected with connection member, and constitutes
The protection pipe of insertion, steel stream flow to protection sleeve pipe by tapping hole through connection member.
Preferably, protection sleeve pipe is conical pipe, and the internal diameter at the cannula inlet port end of protection sleeve pipe is less than cannula exit end
Internal diameter, and the diameter of the internal diameter more than tapping hole at cannula inlet port end.
Preferably, accommodating chamber is offered in connection member, accommodating chamber is used for the outside for being sleeved on tapping hole.
Preferably, described accommodating chamber is cylindrical cavity, and the internal diameter of cylindrical cavity is more than the internal diameter at cannula inlet port end.
Preferably, the tube wall of described protection sleeve pipe sets gradually shell, thermal insulation layer and refractory masses from outside to inside.
Preferably, connection member is connected by the connecting bottom board of bottom with cannula inlet port end, is provided with the connecting bottom board
Pockets.
Preferably, in addition to positioning element, described positioning element is used to be connected with tapping hole；Described connection member with
Positioning element is detachably connected.
Preferably, positioning element includes positioning cylinder and assembling projection, and positioning cylinder is used for the outside for being sleeved on tapping hole；
Described assembling projection is arranged at the bottom of positioning cylinder.
Preferably, it is provided with mounting structure at the top of connection member, the component intrados of described mounting structure and positioning
Cylinder is engaged；Described mounting structure is provided with the fitting recess being engaged with assembling projection；Rotation mounting structure makes fitting recess
It is adapted to the assembling projection of positioning element, connection member is installed on positioning element.
Preferably, the bottom of the mounting structure of described connection member is provided with limiting plate, and the limiting plate is used to control to fill
Limit is moved down with projection.
3. beneficial effect
The technical scheme provided using the utility model, compared with existing known technology, with following remarkable result：
(1) a kind of protection pipe being used in molten steel tapping process of the present utility model, the internal diameter of protection sleeve pipe is more than tapping
Mouthful diameter, there is gap, the cannula inlet port of protection sleeve pipe between the inwall of protection sleeve pipe when the steel stream is flowed through protection sleeve pipe
End is connected with connection member, and steel stream flow to protection sleeve pipe by tapping hole through connection member, enters during being tapped to molten steel
Row protection, reduces adsorbance of the molten steel to pernicious gases such as nitrogen hydrogen in air；
(2) a kind of protection pipe being used in molten steel tapping process of the present utility model, the internal diameter of protection sleeve pipe is more than tapping
Mouthful diameter, have gap between the inwall of protection sleeve pipe when the steel stream is flowed through protection sleeve pipe, during tapping, molten steel with
The space of protection sleeve pipe inwall forms good insulation void layer, has good heat insulation effect to molten steel, reduces molten steel
Heat loss, and molten steel directly washing away to protection sleeve pipe inwall is avoided, so as to substantially increase service life；
(3) a kind of protection pipe being used in molten steel tapping process of the present utility model, the tube wall of protection sleeve pipe is from outside to inside
Shell, thermal insulation layer and refractory masses are set gradually, the heat-barrier material of thermal insulation layer can effectively limit molten steel in protection sleeve pipe
Heat to protection sleeve pipe external cooling, reduce the temperature loss in tapping process, and then tapping temperature can be reduced, save
Make steel energy consumption；
(4) a kind of protection pipe being used in molten steel tapping process of the present utility model, is provided between shell and thermal insulation layer
Void layer, void layer changes the heat transfer condition of protection sleeve pipe, and limiting molten steel in protection sleeve pipe, to external heat transfer, reduces steel
Thermal loss in water tapping process；
(5) it is provided with receiving on a kind of protection pipe being used in molten steel tapping process of the present utility model, connecting bottom board recessed
Groove, the pockets are arranged at the circumferential edges position of connecting bottom board, and tapping hole filler goes out in the splash in tapping hole pipeline
When, tapping hole filler will be injected in the pockets of connecting bottom board, reduces the quality that tapping hole filler is fallen into ladle tank,
Influence of the tapping hole filler to steel quality can be avoided, the smelting quality of molten steel is improved；
(6) a kind of protection pipe being used in molten steel tapping process of the present utility model, positioning element is used for and tapping hole phase
Even, connection member is detachably connected with positioning element, in the case where protection sleeve pipe is damaged, the protection pipe that can more renew in time；
(7) dress is provided with the top of a kind of protection pipe being used in molten steel tapping process of the present utility model, connection member
With component, mounting structure is provided with the fitting recess being engaged with assembling projection, and rotation mounting structure makes fitting recess and positioning element
Assembling projection adaptation, connection member can be sleeved on to the outside of positioning cylinder, then rotating engagement makes the dress of connection member
It is interspersed, i.e., mounting structure is connected on the assembling projection of positioning element with assembling projection with groove, so that by connection member
It is installed on positioning element, is conveniently replaceable and installs；
(8) under a kind of protection pipe being used in molten steel tapping process of the present utility model, the mounting structure of connection member
Portion is provided with limiting plate, and limiting plate moves down limit for control assembling projection, limits gas and occur convection current in steel flow table face,
Gas violent flow in protection sleeve pipe is inhibited, and then limits the pernicious gas in air and is spread into molten steel, is effectively subtracted
Lack molten steel heat loss, reduce the molten steel temperature drop produced in tapping process.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present utility model；
Fig. 2 is the structural representation of protection sleeve pipe of the present utility model；
Fig. 3 is the structural representation of pockets of the present utility model；
Fig. 4 is the assembling structure schematic diagram of positioning element of the present utility model and connection member；
Fig. 5 is the structural representation that connection member of the present utility model assembles projection；
Fig. 6 is the structural representation of positioning element of the present utility model；
Fig. 7 is the cross-sectional view of connection member of the present utility model.
Label declaration in schematic diagram：
100th, protection sleeve pipe；101st, refractory masses；102nd, thermal insulation layer；103rd, void layer；104th, shell；110th, sleeve pipe enters
Mouth end；120th, cannula exit end；
200th, connection member；210th, accommodating chamber；220th, connecting bottom board；221st, pockets；222nd, groove slant face；230、
Mounting structure；231st, fitting recess；232nd, component intrados；240th, limiting plate；
300th, positioning element；310th, cylinder is positioned；320th, projection is assembled；321st, projection extrados.
Embodiment
Hereafter the detailed description to exemplary embodiment of the present utility model with reference to accompanying drawing, and the one of accompanying drawing formation description
Part, shows the enforceable exemplary embodiment of the utility model as example in the figure.Although these exemplary realities
Apply example to be described in sufficient detail to enable those skilled in the art to implement the utility model, it is to be understood that it can be realized
His embodiment and can various changes can be made to the utility model in the case where not departing from spirit and scope of the present utility model.Hereafter
More detailed description to embodiment of the present utility model is not limited to required scope of the present utility model, and only
In order to be illustrated and do not limit the characteristics of to the utility model and feature description, it is of the present utility model to propose to perform
Best mode, and be sufficient so that those skilled in the art and can implement the utility model.Therefore, scope of the present utility model only by
Appended claims are limited.
Hereafter detailed description of the present utility model and example embodiment can be more fully understood with reference to accompanying drawing, wherein this reality
Identified with new element and feature by reference.
Embodiment 1
With reference to shown in Fig. 1, a kind of protection pipe being used in molten steel tapping process of the present utility model, including protection sleeve pipe
100 and connection member 200, the internal diameter of described protection sleeve pipe 100 is more than the diameter of tapping hole, steel stream is flowed through protection sleeve pipe
There is gap between the inwall of protection sleeve pipe 100 when 100；Connection member 200 is used to be connected with tapping hole, and connection member 200
Accommodating chamber 210 is inside offered, the accommodating chamber 210 is used for the outside for being sleeved on tapping hole.Moreover, described accommodating chamber 210 is circle
Cylindrical cavity, the internal diameter of cylindrical cavity is more than the internal diameter at cannula inlet port end 110.
The cannula inlet port end 110 of the protection sleeve pipe 100 of the present embodiment is connected with connection member 200, and constitutes the guarantor of insertion
Pillar, when connection member 200 is sleeved on outside tapping hole, protection sleeve pipe 100 keeps coaxial with tapping hole, i.e. protection sleeve pipe
100 axle center and the axle center of tapping hole are on same straight line.Open after tapping hole, under gravity, steel stream is by going out for molten steel
Steel mouthful flow to protection sleeve pipe 100 through connection member 200, and the internal diameter of protection sleeve pipe 100 flows through steel stream more than the diameter of tapping hole
There is gap between the inwall of protection sleeve pipe 100 during protection sleeve pipe 100 so that inwall of the molten steel not with protection sleeve pipe 100 is contacted,
Or inwall of the molten steel not exclusively with protection sleeve pipe 100 is contacted, the inwall of protection sleeve pipe 100 is washed away so as to reduce molten steel,
Improve service life.
Under the guiding of prior art inertial thinking, often directed thinking thinks existing technical staff, in the mistake of tapping
It need not be protected in journey, even if having paid close attention to the protection in tapping process, it is also difficult to imagine using protection pipe to tapping
During molten steel protected, therefore the utility model proposes tapping process in protection pipe broken the skill of prior art
Art prejudice, with significant progressive.Even so, even if there is technical staff to pay close attention to the molten steel protection in tapping process, that
In order to improve the protecting effect in tapping process, molten steel and air contact are prevented, existing technical staff often will protection
Sleeve pipe 100 and tapping hole be set to it is isometrical, so as to avoid between the molten steel in protection sleeve pipe 100 and the inwall of protection sleeve pipe 100
Space is produced, because there is space to make molten steel and air contact, therefore in order to obtain preferable protecting effect, prior art
Technical staff necessarily protection sleeve pipe 100 and tapping hole are set to it is isometrical；But, so design but greatly reduces protective case
The service life of pipe 100, preferable protecting effect is not reached not only, production cost is added on the contrary.The utility model proposes
The internal diameter of protection sleeve pipe 100 is more than the diameter of tapping hole, inwall when making the steel stream flow through protection sleeve pipe 100 with protection sleeve pipe 100
Between have gap, during tapping, it is to avoid molten steel directly washing away to protection sleeve pipe 100 inwall, so as to greatly improve
Service life.At the same time, the space of molten steel and the inwall of protection sleeve pipe 100 forms good insulation space, and it has good
Heat insulation effect, reduce the heat loss of molten steel.
Protection sleeve pipe 100 is conical pipe (as shown in Figure 1), and the internal diameter at the cannula inlet port end 110 of protection sleeve pipe 100 is less than
The internal diameter at cannula exit end 120, and the diameter of the internal diameter more than tapping hole at cannula inlet port end 110；The present embodiment middle sleeve entrance
The internal diameter at end 110 is the diameter of 1.5 times of tapping hole；The internal diameter at cannula exit end 120 is the diameter of 3.0 times of tapping hole.Set
The internal diameter that the internal diameter at tube inlet end 110 is less than cannula exit end 120 effectively limit cross-ventilation, prevent air in protective case
Violent flow in pipe 100, so that the pernicious gas limited in air spreads into molten steel, and the less feelings of cross-ventilation
Under condition, only the air in protection sleeve pipe 100 can't produce influence to steel quality.
At the same time, steel-making is in tapping process because molten steel exposes in atmosphere, and steel stream causes because of heat radiation, heat loss through convection
Molten steel produces larger temperature drop during tapping, by taking electric furnace as an example, molten steel temperature drop is even up to during electric furnace steel tapping
50-80℃.The design of protection sleeve pipe 100 limits convection heat transfer' heat-transfer by convection of the air in steel flow table face in the present embodiment, reduces molten steel
Dropped in the temperature of protection sleeve pipe 100.Molten steel by tapping hole after being flowed out, due to the reduction of molten steel pressure itself so that molten steel exists
It can be spread when flowing in ladle tank, that is, flow to diameter of the diameter of steel stream when in ladle tank more than steel stream at tapping hole, set
The internal diameter at tube inlet end 110 be less than cannula exit end 120 internal diameter can also keep simultaneously molten steel when flowing to bottom still
Space is kept with the inwall of protection sleeve pipe 100, so as to improve the service life of protection sleeve pipe 100, being formed again has good insulation
The space heat-insulation layer of effect, therefore with significant progressive.
Embodiment 2
The substance be the same as Example 1 of the present embodiment, difference is：The tube wall of protection sleeve pipe 100 from outside to inside according to
Secondary setting shell 104, thermal insulation layer 102 and refractory masses 101 (as shown in Figure 2)；Described shell 104 is with higher machinery
The steel construction of intensity is made, and described thermal insulation layer 102 is made up of heat-barrier material, and wherein heat-barrier material is glass fibre, asbestos, rock
Cotton or silicate, or combinations of the above；The heat-barrier material of thermal insulation layer 102 can effectively limit molten steel in protection sleeve pipe 100
Heat to the external cooling of protection sleeve pipe 100, reduce the temperature loss in tapping process, and then can reduce tapping temperature,
Save steel-making energy consumption.Described refractory masses 101 are arranged at the inwall of protection sleeve pipe 100, and refractory masses 101 have fire proofed wood
Material is made, and can effectively resist washing away and corroding for molten steel.Described thermal insulation layer 102 is arranged at shell 104 and refractory masses
Between 101.
Embodiment 3
The substance be the same as Example 2 of the present embodiment, difference is：Also set up between shell 104 and thermal insulation layer 102
Have and space is provided between void layer 103 (as shown in Figure 2), i.e. shell 104 and thermal insulation layer 102, and constitute void layer 103, should
Void layer 103 can be vacuum condition, can also will be filled with the void layer 103 of arbitrary gas, the void layer of the present embodiment
Filled with air in 103.Void layer 103 between shell 104 and thermal insulation layer 102 changes the heat transfer condition of protection sleeve pipe 100, from
And limiting molten steel in protection sleeve pipe 100, to external heat transfer, reduces the thermal loss in molten steel tapping process.
Embodiment 4
The substance be the same as Example 1 of the present embodiment, difference is：The connection bottom that connection member 200 passes through bottom
Plate 220 is connected with cannula inlet port end 110, and through hole is provided with connecting bottom board 220, and the through hole is corresponding with cannula inlet port end 110 to be set
Put, the accommodating chamber 210 of connection member 200 passes through above-mentioned through hole and the insertion of protection sleeve pipe 100 so that molten steel can be by tapping hole through holding
Chamber 210 of receiving is flow in protection sleeve pipe 100, and realizes protective effect to molten steel.Pockets 221 are provided with connecting bottom board 220,
The pockets 221 are arranged at the circumferential edges position (as shown in Figure 3) of connecting bottom board 220.
In the eccentric bottom tapping method (EBT) of electric furnace, electric furnace is before tapping, to prevent molten steel from flowing directly to invade on supporting plate
Supporting plate is lost, generally filling tapping hole is filled out inside tapping hole (described tapping hole the is eccentric bottom tapping mouthful) pipe on supporting plate top
Material, these tapping hole fillers extract supporting plate out between supporting plate and molten steel on the pipeline from tapping hole, open tapping hole
Afterwards under molten steel Action of Gravity Field, tapping hole filler can be extruded splash by tapping hole and gone out by molten steel, splash and the tapping hole that goes out is filled out
Material is eventually fallen into ladle tank, is then melted in high-temperature molten steel.But, due to containing substantial amounts of impurity in tapping hole filler,
Fusing into the tapping hole filler of high-temperature molten steel will cause harmful element to enter in molten steel, be degrading the performance of steel, be the outer essence of follow-up stove
Refining brings pressure；Therefore, for the steelmaking process of electric furnace, the protection pipe of electric furnace steel making tapping is devised, its connecting bottom board
Pockets 221 are provided with 220, the pockets 221 are arranged at the circumferential edges position of connecting bottom board 220, tapping hole is filled out
Material is when the splash in tapping hole pipeline goes out, and its spray regime is radial, and tapping hole filler will be injected in connecting bottom board 220
Pockets 221 in so that part tapping hole filler will not fall into ladle tank, reduce tapping hole filler to molten steel matter
The influence of amount, improves the smelting quality of molten steel, reduces smelting cost, with significant progressive.
Embodiment 5
The substance be the same as Example 4 of the present embodiment, difference is：The medial surface of pockets 221 inclines for groove
Inclined-plane 222, the angle of inclination in the groove slant face 222 is 45 °, and groove slant face 222 causes in tapping hole filler along putting
Penetrate shape it is spouting when, tapping hole filler is more easy to fall into pockets 221, further reduces tapping hole filler and falls into steel
Bao Zhong, and then the smelting quality of molten steel is improved, reduce smelting cost.
Embodiment 6
The substance be the same as Example 1 of the present embodiment, difference is：Also include positioning element 300, described positioning
Part 300 is used to be connected with tapping hole, and the positioning element 300 is hollow cannula-like, and positioning element 300 can be sleeved on tapping
The outside of mouth, it is possible to the bottom of tapping hole is arranged on by welding or other attachments；Described connection member 200
It is detachably connected (as shown in Figure 4) with positioning element 300, described is detachably connected as threaded connection or clamping.
The specific structure of clamping of the present embodiment is：Positioning element 300 includes positioning cylinder 310 and assembling projection 320, fixed
Circle of position cylinder 310 is used for the outside for being sleeved on tapping hole, and positioning cylinder 310 is hollow cannula-like；Described assembling projection 320 is set
It is placed in the bottom (as shown in Figure 6) of positioning cylinder 310.
The top of connection member 200 is provided with mounting structure 230, and mounting structure 230 is provided with through hole, the circular arc of the through hole
Face is component intrados 232, and the component intrados 232 of described mounting structure 230 is engaged with positioning cylinder 310, assembles structure
Part 230 can be sleeved on the outside of positioning cylinder 310；And mounting structure 230 is provided with the assembling being engaged with assembling projection 320
Groove 231 (as shown in figure 5 and figure 7)；Rotation mounting structure 230 fits the assembling projection 320 of fitting recess 231 and positioning element 300
Match somebody with somebody, connection member 200 can be sleeved on to the outside of positioning cylinder 310, then rotating engagement 200, make connection member 200
Fitting recess 231 is interspersed with assembling projection 320, i.e., mounting structure 230 is connected to the assembling projection 320 of positioning element 300
On, so that connection member 200 is installed on positioning element 300.Installation process is simple and convenient, if moreover, protection sleeve pipe 100
Damage, the protection pipe that can more renew in time.
Embodiment 7
The substance be the same as Example 1 of the present embodiment, difference is：Under the mounting structure 230 of connection member 200
Portion is provided with limiting plate 240, and limiting plate 240 is provided centrally with through hole, and limiting plate 240 is provided centrally with through hole, the through hole it is interior
Footpath is between the internal diameter and external diameter of tapping hole, i.e. the internal diameter of tapping hole<The internal diameter of through hole<The external diameter of tapping hole, so that
Limiting plate 240 can limit the limit that moves down of tapping hole, and normal tapping is can guarantee that again.
Tapping hole is engaged (as shown in Figure 7) with the through hole at the center of limiting plate 240.Molten steel is flowed out by tapping hole, and steel is flowed through
The inflow protection sleeve pipe 100 at the center of limiting plate 240；The limiting plate 240 moves down limit for control assembling projection 320, it is to avoid
The depth of the loading of positioning element 300 connection member 200 is too deep during assembling, while improving efficiency of assembling, it is to avoid
Connection member 200 and the damaged in collision of positioning element 300.
At the same time, steel outflow steel during, steel stream flows to protection sleeve pipe 100 by tapping hole, due to steel stream with
There is gap, steel flow table face can drive air body to flow between accommodating chamber 210 in protection sleeve pipe 100 and connection member 200, and
So that in steel flow table face convection current occurs for gas.The limiting plate 240 is spacing while to the accommodating chamber 210 in connection member 200
Split, accommodating chamber 210 is divided into 2 independent spaces, limited gas and occur convection current in steel flow table face, it is suppressed that gas
Body violent flow in protection sleeve pipe 100, and then limit the pernicious gas in air and spread into molten steel；At the same time, also
Convection heat transfer' heat-transfer by convection of the air in steel flow table face is limited, the temperature for reducing molten steel in protection sleeve pipe 100 drops, and reduces tapping process
In energy consumption.
Embodiment 8
The substance be the same as Example 1 of the present embodiment, difference is：The external diameter and accommodating chamber of projection extrados 321
210 internal diameter is identical (as shown in Figure 6), and projection extrados 321, which can coordinate, to be installed in inside accommodating chamber 210, it is to avoid location division
Part 300 and connection member 200 are mutually slided in the horizontal direction, so as to improve efficiency of assembling, also improve tapping hole axis
With the centering degree of the axis of protection sleeve pipe 100.
It is of the present utility model it is a kind of be used for molten steel tapping process in protection pipe, in production by the present apparatus be installed on electric furnace with
Between ladle, closed steel circulation road is set up, molten steel and air contact have effectively been completely cut off using physical method, steel is greatly reduced
Water effectively reduces molten steel heat loss to the adsorbances of the pernicious gases such as nitrogen hydrogen, reduces the steel produced in tapping process
Water temperature drops.The quality of molten steel is improved, and by reducing tapping process temperature drop, can further reduce tapping temperature, save significantly
About electric furnace production cost.Certain device can be used for other converters, for the molten steel protection in its tapping process.
The utility model is described in detail above in conjunction with specific exemplary embodiment.It is understood, however, that can be
Various modifications and variations are carried out in the case of not departing from the scope of the present utility model being defined by the following claims.Detailed retouches
State should be to be considered only as with accompanying drawing it is illustrative and not restrictive, if there is any such modifications and variations, then
They are fallen within the range of the utility model described here.In addition, background technology is intended to illustrate grinding for this technology
It was found that shape and meaning, it is no intended to limit the utility model or the application and application field of the present utility model.
More specifically, although exemplary embodiment of the present utility model has been described herein, the utility model is simultaneously
These embodiments are not limited to, but are repaiied including the process that those skilled in the art can be appreciated that according to detailed description above
Change, omit, any and whole embodiments of (such as between each embodiment) combination, adaptive change and/or replacement.Power
Restriction during profit is required can widely be explained according to the language used in claim, and be not limited to retouch in detail foregoing
The example stated or described during this application is implemented, these examples are considered as nonexcludability.For example, new in this practicality
In type, term " preferably " not exclusively, here it means that " preferably, but be not restricted to that ".It is in office where method
Or any step enumerated in process claims can in any order perform and be not limited to propose in claim it is suitable
Sequence.Therefore, scope of the present utility model should be determined only by appended claims and its legal equivalents, rather than by above
The explanation and example that provide is determined.
Claims (10)
1. a kind of protection pipe being used in molten steel tapping process, it is characterised in that：Including
Protection sleeve pipe (100), the internal diameter of the protection sleeve pipe (100) is more than the diameter of tapping hole, steel stream is flowed through protection sleeve pipe
(100) there is gap when between the inwall of protection sleeve pipe (100)；
Connection member (200), the connection member (200) is used to be connected with tapping hole；
The cannula inlet port end (110) of described protection sleeve pipe (100) is connected with connection member (200), and constitutes the protection of insertion
Pipe, steel stream flow to protection sleeve pipe (100) by tapping hole through connection member (200).
2. a kind of protection pipe being used in molten steel tapping process according to claim 1, it is characterised in that：Protection sleeve pipe
(100) it is conical pipe, and the internal diameter at the cannula inlet port end (110) of protection sleeve pipe (100) is less than the interior of cannula exit end (120)
Footpath, and the diameter of the internal diameter more than tapping hole of cannula inlet port end (110).
3. a kind of protection pipe being used in molten steel tapping process according to claim 1, it is characterised in that：Connection member
(200) accommodating chamber (210) is offered in, accommodating chamber (210) is used for the outside for being sleeved on tapping hole.
4. a kind of protection pipe being used in molten steel tapping process according to claim 3, it is characterised in that：Described receiving
Chamber (210) is cylindrical cavity, and the internal diameter of cylindrical cavity is more than the internal diameter of cannula inlet port end (110).
5. a kind of protection pipe being used in molten steel tapping process according to claim 4, it is characterised in that：Described protection
The tube wall of sleeve pipe (100) sets gradually shell (104), thermal insulation layer (102) and refractory masses (101) from outside to inside.
6. a kind of protection pipe being used in molten steel tapping process according to claim 5, it is characterised in that：Connection member
(200) it is connected by the connecting bottom board (220) of bottom with cannula inlet port end (110), receiving is provided with the connecting bottom board (220)
Groove (221).
7. a kind of protection pipe being used in molten steel tapping process according to claim any one of 1-6, it is characterised in that：Also
Including positioning element (300), described positioning element (300) is used to be connected with tapping hole；Described connection member (200) is with determining
Position part (300) is detachably connected.
8. a kind of protection pipe being used in molten steel tapping process according to claim 7, it is characterised in that：Positioning element
(300) positioning cylinder (310) and assembling projection (320) are included, positioning cylinder (310) is used for the outside for being sleeved on tapping hole；Institute
The assembling projection (320) stated is arranged at the bottom of positioning cylinder (310).
9. a kind of protection pipe being used in molten steel tapping process according to claim 8, it is characterised in that：Connection member
(200) it is provided with mounting structure (230) at the top of, the component intrados (232) and positioning cylinder of described mounting structure (230)
(310) it is engaged；
Described mounting structure (230) is provided with the fitting recess (231) being engaged with assembling projection (320)；Rotate mounting structure
(230) fitting recess (231) is made to be adapted to the assembling projection (320) of positioning element (300), it is fixed that connection member (200) is installed on
On position part (300).
10. a kind of protection pipe being used in molten steel tapping process according to claim 9, it is characterised in that：Described company
The bottom of the mounting structure (230) of relay part (200) is provided with limiting plate (240), and the limiting plate (240) is used to control assembling convex
Block (320) moves down limit.
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| CN201720183472.4U CN206484009U (en) | 2017-02-28 | 2017-02-28 | A kind of protection pipe being used in molten steel tapping process |
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| CN201720183472.4U CN206484009U (en) | 2017-02-28 | 2017-02-28 | A kind of protection pipe being used in molten steel tapping process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108115120A (en) * | 2017-02-28 | 2018-06-05 | 安徽工业大学 | A kind of protection pipe in molten steel tapping process |
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2017
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108115120A (en) * | 2017-02-28 | 2018-06-05 | 安徽工业大学 | A kind of protection pipe in molten steel tapping process |
| CN108115120B (en) * | 2017-02-28 | 2024-01-30 | 安徽工业大学 | Protective tube for molten steel tapping process |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170912 Termination date: 20180228 |