CN204385223U - For the folded heat shield cap of the combustion chamber of Cowper stove - Google Patents

Abstract

A kind of folded heat shield cap (1) of the combustion chamber for Cowper stove, comprises framework (2), actuator and thermal insulation layer (9).Framework comprises two or more section (4,5,6,7) and one or more hinge (19), and portion's section of framework is linked together by one or more hinge (19).Actuator folds and opens portion's section of thermal shield.Thermal insulation layer (9) is arranged on the surface away from hinge (19) of framework.

Description

For the folded heat shield cap of the combustion chamber of Cowper stove

The utility model relates to a kind of thermal shield, particularly, relates to a kind of for keeping in repair the thermal shield used in the method for the internal fired furnace of blast furnace hotblast stove.

Being used for preheating regularly needs internal maintenance work for the hotblast stove being ejected into the air in blast furnace due to its extreme operating environment.Maintenance work concentrates in ' combustion chamber ' of stove usually.

In order to implement necessary maintenance in tradition ' cold maintenance ' process, hotblast stove must cool several days lentamente, then can enter to allow to carry out maintenance work, and after maintenance work, lentamente stove must be heated to its service temperature again.The inside of stove is very responsive to thermograde, and if do not control carefully cooling and heating, so the inside of stove can be easy to impaired.Due to cooling and the heating interval of prolongation, this is tediously long process, and because stove operation is most important to blast furnace, so such maintenance is very expensive in expense due to the production loss of blast furnace.

In order to shorten the time of implementing needed for stove maintenance, ' heat maintaining ' of furnace interior becomes conventional means.But at present, this is only possible for ' external combustion type ' hotblast stove, because ' external combustion type ' hotblast stove uses large cylindrical combustion chamber usually, its diameter is less three times than the obtainable diameter entering branch.By maintenance area being isolated and keeping the high temperature of the remainder of stove, cool and significantly reduce heat-up time, and the Potential feasibility damaging furnace interior significantly reduces due to thermograde.

' internal combustion type ' hotblast stove has the horizontal section of usual lens shape, and has the room ' width ' larger than external furnace, and can't make the certain area heat isolation of internal fired furnace at present thus allow to implement maintenance work.

According to first aspect of the present utility model, the folded heat shield cap for the combustion chamber of Cowper stove comprises: framework, and this framework comprises two or more sections; One or more hinge, portion's section of framework is linked together by one or more hinge; Actuator, actuator is used for folding and opens portion's section of thermal shield; And thermal insulation layer, thermal insulation layer be positioned at framework away from the surface of hinge.

The utility model provides thermal shield, this thermal shield can be inserted through stove branch under the high temperature conditions foldedly and launch in following position subsequently, this position allow stove part thermal insulation simultaneously for heat-eliminating medium keep can pass in and out route, thus allow stove portion's section be cooled other sections are remained on the condition of high temperature simultaneously.

Preferably, thermal insulation layer cover framework and be constant thickness.

The layout of folding hinge guarantees that heat-insulating cover is constant thickness, and does not need to reduce thickness at hinge place.

Preferably, framework comprises central supporting thing and is attached to portion's section of central supporting thing.

Preferably, actuator comprises cable wire.

Cable wire can stand tension force effect thus folding shield cap.

Preferably, thermal shield also comprises adjustable support thing.

Preferably, adjustable support thing comprises the one in scissor-like jack or adjustable Steel Prop.

Preferably, thermal shield also comprises control cable, controls cable and is connected in controller and between thermal shield and adjustable support thing.

Preferably, framework also comprises a series of longitudinal strut and a series of transverse member.

In some embodiments, hinge is arranged in longitudinal supports, but preferably, hinge is arranged on transverse member.

Preferably, thermal insulation layer comprises multiple plate, and each plate is installed in the independently portion section of framework.

Preferably, upholder also comprises counterweight transport lever apparatus.

According to second aspect of the present utility model, a kind of method thermal shield being arranged at removedly the inner combustion chamber of the hotblast stove for blast furnace, comprises and is inserted in combustion chamber by the folding thermal shield according to first aspect via import; And inside combustion chamber, open thermal shield.

The folded heat shield cap design of multi-section section is enough compact with the branch making to be inserted through such as hot blast branch, but once thermal shield launches, so has enough large size to cover whole inner combustion chamber eyeglass tee section.

Preferably, import is the hot blast branch of hotblast stove, combustion air branch or combustion gases branch.

Preferably, thermal shield is inserted on upholder.

Preferably, upholder forms cooling flow channel in import.

Preferably, the method is also included in the thermal shield that burning indoor moving opens.

Preferably, thermal shield moves on adjustable support thing.

Preferably, moved by the control cable Long-distance Control being attached to thermal shield and adjustable support thing by the operator outside hotblast stove.

Preferably, according to the interior dimensions Selection Framework yardstick of combustion chamber.

According to the third aspect of the present utility model, a kind of method of the maintenance realized in hotblast stove inner combustion chamber comprises, and provides the thermal shield according to first aspect removedly; Make cooling flow pass through the cooling flow passage be formed in import to start to enter in the part below thermal shield of combustion chamber; This part is cooled to temperature required; And implement maintenance in the portion.

Preferably, the method stops cooled flow after being also included in and having implemented described maintenance and removes shield cap.

Fold mechanism allows thermal shield to fold back permission by entering the shape that branch carries out removing, and makes the part of keeping in repair of stove again can heat and can restart routine operation.

Preferably, the method also comprises provides temperature sensor or probe and in a combustion chamber by the temperature of measuring combustion chamber and by measured temperature and temperature requiredly compare monitoring temperature.

This allows operator to determine, and when this part has reached for implementing safety temperature needed for maintenance.

Preferably, the method is also included in maintenance and monitoring continuously temperature in heating phase process again.

Temperature sensor can be inserted through import, or is arranged on the surface away from thermal insulator of thermal shield.

Example according to thermal shield of the present utility model and using method thereof is now described with reference to the accompanying drawings, in the accompanying drawings:

Fig. 1 shows the part according to thermal shield of the present utility model;

Fig. 2 shows the thermal shield being launched into its extended position in Fig. 1, wherein, conceals some thermal insulators;

Fig. 3 shows the thermal shield risen inside the combustion chamber of inner combustion chamber's hotblast stove in Fig. 1;

Fig. 4 shows according to the example folded up for the thermal shield installed of the present utility model;

Fig. 5 is the alternative view of Fig. 4;

Fig. 6 shows according to the thermal shield opened completely of the present utility model;

Fig. 7 is the view from unilateral observation in Fig. 6;

Fig. 8 shows pistol grip handle;

Fig. 9 shows the example according to the folding thermal shield be inserted in the stove branch of hotblast stove of the present utility model; And

Figure 10 to Figure 14 shows the opening sequence of the thermal shield of Fig. 6.

With regard to the use in the heat maintaining of external furnace, folding thermal protection and adiabatic apparatus are inserted through the opening in stove combustion chamber (being generally hot blast branch) and open thus fill cylindrical chamber region to a great extent.Due at combustion chamber and the favourable size ratio entered between branch that uses, thermal shield has maximum two folding hinges usually.Thermal shield is coated with thermal insulation material thus high temperature and work area is below kept apart.Folding hinge usually folded position towards on; this simplify the expansion of shield cap; but because such hinge needs heat-insulating cover to carry out chamfering; once thermal shield launches; hinge is so made to expose; and need manually to insert other thermal insulators after the expansion, on the heating surface of shield cap, need to use large-scale PPE (personal protective device) equipment.Temperature barrier is roughly inserted in middle face in hot blast branch or height location place on the lower usually, and needs two-part lifting process that thermal shield is promoted to its normal operating position.

But typical internal combustion burns room stove and accessory very large combustion chamber width, and the hot blast size of branch similar to external furnace.This size increased needs to exceed current the more complicated temperature barrier and the insertion/expansion process that accept the ability of practice.

A part according to the thermal shield for internal fired furnace of the present utility model has been shown in Fig. 1.Framework 2 is provided with longitudinal strut 3 and transverse member 8 in the sub-portion section 4,5,6,7 of framework.Transverse member can form a part for linkage, or hinge 19 can be mounted to other parts of transverse member or framework 2.Thermal insulator 9 be arranged on framework away from the surface of hinge, thus protect-ing frame structure and hinge are not heated in use.Usually the size of Selection Framework is carried out based on the interior dimensions of the stove that need use framework.Framework needs mate the inner section of stove as far as possible closely thus have maximum validity in protection specified region are not heated, but closely cooperation can not can make to there is the risk that shield cap is blocked in a certain position in stove after the expansion.

As shown in Figure 2, thermal shield of the present utility model is installed by folding shield cap 1 is inserted through branch 10 via counterweight utensil 30.Upwards opened by thermal shield 1 by applying moment of torsion to axle 31, axle 31 is connected directly to the main hinge on thermal shield.By handling this axle, by means of gravity and cable auxiliary latch, all hinges can be locked in appropriate location.

Fig. 3 illustrates once thermal shield launches, thermal shield how in combustion chamber on rise thus the refractory materials that can keep in repair above branch 10.Usually launched by hot blast branch, but also can be launched by the air branch of the bottom on stove or gas branch.Insert water-cooled guide rail 32, water-cooled guide rail 32 bolt is bonded to stove branch 10 (being generally hot blast branch), for support.Upholder 11 (such as scissor-like jack, scaffolding or Acrow (ball is flourish) pillar) allows to be risen in stove by thermal shield for the guide rail 22 supported by using.Shield cap once coordinate, then provides the protection away from radiant heat 14 in the region 15 remaining on the condition of high temperature.Multiple gap can be provided with thus allow to have for installing through thermal shield thus the space of the burner of temperature in retaining zone 15 in thermal shield.The upholder on counterweight utensil 30 of thermal shield also forms the path of the cooling flow 12 for being provided by stove branch 10, makes protected region 13 to be cooled to safe working temperature.In order to clear, the installation of the thermal shield launched shown in Fig. 3 illustrate only the part of the heat-resisting thermal insulator in portion's section 7, but in use, all portions section 4,5,6,7 is all provided with thermal insulator.Hinge 19 permission portion section 4,5,6 is folded up around central section 7, as shown in Figures 4 and 5.The weight of thermal shield 1 can be transported bar utensil 30 from counterweight and to be delivered to scissor-like jack 11 thus to allow thermal shield to raise, thus can keep in repair hot blast branch heat-stable material, because the heat resisting brick in hot blast branch is easy to damage.Possible structure for transmitting this load comprises pistol grip handle 33 or similar designs.

As described with reference to fig. 1, the cable wire used under tension may be used for thermal shield to be closed into its folded state and discharges thus allow shield cap to stretch again and puts in place.This can be controlled by operator or automatically be controlled by controller outside hotblast stove.Thermal insulator 9 is arranged across total, but, in order to clear, in Fig. 1 to Fig. 3, illustrate only limited portion's section.Be have multiple hinge 19 at each transverse member 8 place in this example, thus make shield cap folding fully downwards thus be coupled in stove branch 10 to insert.Hinge is below thermal insulator and the therefore protected impact from main radiant heat source 14.

Preferably; thermal insulator in each section of framework is provided with flexibility and compressible top layer independently; make when shield cap folds; this shield cap fits through as far as possible compactly and to arrive in hotblast stove 18 and when shield cap is raised inside stove, the vertical movement that flexible materials provides necessity protection avoiding being heated to allow against impaired wall simultaneously.Thermal shield structural framing is designed to lightweight and firm at elevated temperatures, and major function is that to support retaining zone 13 be cold and retaining zone 15 is hot required thermal insulator.If needed, a burner or multiple burner can be located through a hole in thermal shield thus provide heat to region 15.Hinge is the simple designs with wide arc gap cooperation, if make thermal shield impaired, so still thermal shield can be folded up and removed from stove by thermal shield.Fig. 6 and Fig. 7 shows the view of the stereographic map when thermal shield launches and the forward observation from thermal shield.The shield cap 1 opened has the effective continuous thermal insulating layer 9 in portion's section 4,5,6,7 on a surface, and protects the hinge 19 be arranged on another surface of framework 2 from radiant heat.The plate that hinge 19a, 19b, 19c support for them carrys out dimensioning, so less hinge 19a is used in the end of thermal shield, and for central hinge 19c, supports maximum heat-insulating shield.

Described example describes the design folding towards central authorities and open away from central authorities.Although shield cap can be attached to upholder at one end and shield cap is opened from this end, only have when entering stove by non-central fascicle (such as combustion gases or air branch), this is only applicatory.Although describe example based on the hinge 19 being mounted to transverse member, but, if shield cap by different mode of entrance (for the stove of same shape, in fact at a right angle with the direction of insertion illustrated) be inserted in hotblast stove, so, hinge be mounted to longitudinal supports and will the shield cap being opened into the same shape coordinating stove be generated along length instead of cross width matching board.Therefore, the shape that accurate shape and configuration can be suitable for stove and the direction entered, this does not depart from the utility model.

Fig. 8 is shown and transports bar 30 and being connected by the example of pistol grip handle 33 in this case between thermal shield in counterweight, and Fig. 8 shows transport bar and can how to be connected in thermal shield central hump section 7.Fig. 9 shows folding thermal shield and how to be inserted in stove branch.Thermal shield 1 transports bar 30 by counterweight and is thus lifted in stove branch.This allows safety to be inserted in hot stove, and thermal shield can launch outside stove safely by moment of torsion being applied to axle 34, simultaneously hinge and lockout mechanism always protected and from the strong radiant heat from furnace roof.Thermal shield is risen from transport bar 30 by scaffolding or scissor-like jack or other devices in combustion chamber.Once thermal shield has been inserted into inside stove, so transports bar and can be bonded to stove branch for support by bolt.In order to open thermal shield, by applying moment of torsion via lifting-jack or lifting machine, axle 34 is rotated.The initial rotation of axle allows thermal shield partly to open, as shown in Figure 10.Moment of torsion on release shaft 34 allows thermal shield to hang, as shown in Figure 11.Figure 12 shows the lockout mechanism of the downside at thermal shield, by pulling stainless steel cable outside stove, can lock this hinge 35, as shown in Figure 13.Again moment of torsion being applied to axle 34 can hinge-opening, and as shown in Figure 14, and once launch completely, axle is just locked in appropriate location via lockout mechanism thus makes thermal shield remain on unfolded position according to Fig. 7.

In the utility model, thermal shield can be supported on counterweight by pistol grip handle and to transport on bar and thermal shield can be many hinge types thermal shield.Counterweight is transported lever apparatus and is allowed thermal shield to insert inside stove and allow thermal shield to launch not limiting the At The Height of cooling flow through branch and below thermal shield, and before thermal shield is raised to its normal operating position, provide the thermal insulator of improvement.Using counterweight to transport bar allows thermal shield to insert at the top place of branch, and wherein, thermal insulator is positioned at top side, and this protects the impact from main heating source of thermal shield hinge, structure and lockout mechanism from above.Once thermal shield launches in stove, so pistol grip handle upholder 33 makes it possible to be delivered to from transporting the load of bar in stove scissor-like jack or Acrow pillar, and allows thermal shield to rise to further on combustion chamber thus can keep in repair hot blast branch.Thermal shield can launch outside stove and scissor-like jack also can launch outside stove.

Thermal shield can be such thermal shield, its open or be launched into all hinges to be protected in folding heat-insulating shield and thermal insulator towards radiant heat source.The position of folding hinge, away from main thermal shield and always by thermal insulator and frame protection, this reduces the possibility of thermal damage.Keep all hinges to face down or towards interior and away from main heat source for launching thermal shield provide the more time in hinge heating, distortion and before blocking, and guarantee heat-insulating cover once launch just to remain on above hinge.

The thermal shield position be inserted in branch contributes to the general area reducing to cool.The thermal shield being in raised position is inserted in branch the maximum region guaranteeing that allowance heat-eliminating medium enters/leaves.The closing organ folded on itself by device allows to be taken out by stove branch.Closing organ allows device to fold up in the mode that can be removed by stove branch.If do not have this mechanism, thermal shield, once launch, removes being difficult to.

Use multiple folding parts sections to allow large combustion to burn chamber shape be filled the maximum space that is simultaneously provided for thermal insulation material and need minimumly to enter region.Can more in the cardsly than before begin to cool down more quickly by using thermal shield of the present utility model, this has the economic advantages of shorter servicing time, is also provided to the tributary circuit on the downside of thermal shield thus the expansion simply on the downside of permission thermal shield, locking and cooling simultaneously.

Burner can be inserted through thermal shield thus keep the temperature above thermal shield.Combustion air is supplied to burner and may be used for keeping burner to feel nice and cool.Thermal insulator can expand and selectively, the combustion air being supplied to burner expands for keeping inflatable thermal insulator.Thermal insulator can use together with reflective top surface thus reflected radiation is hot.

Claims (11)

1. for a folded heat shield cap for the combustion chamber of Cowper stove, it is characterized in that, comprising: framework, described framework comprises two or more sections; One or more hinge, the described portion section of described framework is linked together by described one or more hinge; Actuator, described actuator is used for the described portion section folding and open described thermal shield; And thermal insulation layer, described thermal insulation layer is positioned on the surface away from described hinge of described framework.

2. folded heat shield cap according to claim 1, is characterized in that, described thermal insulation layer covers described framework and is constant thickness.

3. according to folded heat shield cap according to claim 1 or claim 2, it is characterized in that, described framework comprises central supporting thing and is attached to portion's section of described central supporting thing.

4. according to folded heat shield cap according to claim 1 or claim 2, it is characterized in that, described actuator comprises cable wire.

5. folded heat shield cap according to claim 1, is characterized in that, described thermal shield also comprises adjustable support thing.

6. folded heat shield cap according to claim 5, is characterized in that, described adjustable support thing comprises the one in scissor-like jack or adjustable Steel Prop.

7. according to claim 5 or folded heat shield cap according to claim 6, it is characterized in that, described thermal shield also comprises control cable, and described control cable is connected in controller and between described thermal shield and described adjustable support thing.

8. according to folded heat shield cap according to claim 1 or claim 2, it is characterized in that, described framework also comprises a series of longitudinal strut and a series of transverse member.

9. folded heat shield cap according to claim 8, is characterized in that, described hinge is arranged on described transverse member.

10. according to folded heat shield cap according to claim 1 or claim 2, it is characterized in that, described thermal insulation layer comprises multiple plate, and each plate is arranged in the independently portion section of described framework.

11. folded heat shield caps according to claim 3, is characterized in that, described central supporting thing also comprises counterweight and transports lever apparatus.