EP3332203B1 - Radiant tube with corrugated radiant tube back support - Google Patents
Radiant tube with corrugated radiant tube back support Download PDFInfo
- Publication number
- EP3332203B1 EP3332203B1 EP16745695.3A EP16745695A EP3332203B1 EP 3332203 B1 EP3332203 B1 EP 3332203B1 EP 16745695 A EP16745695 A EP 16745695A EP 3332203 B1 EP3332203 B1 EP 3332203B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- radiant tube
- back support
- furnace
- tube back
- radiant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000463 material Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 4
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 4
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 238000000576 coating method Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000013021 overheating Methods 0.000 description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- MEOSMFUUJVIIKB-UHFFFAOYSA-N [W].[C] Chemical compound [W].[C] MEOSMFUUJVIIKB-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D99/0033—Heating elements or systems using burners
- F27D99/0035—Heating indirectly through a radiant surface
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D99/0033—Heating elements or systems using burners
- F27D2099/0045—Radiant burner
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D2099/0061—Indirect heating
Definitions
- the present invention relates to a radiant tube with corrugated radiant tube back support.
- Furnaces for heat-treating sheets and other products made of steel and other materials comprising, for example, a variably shaped radiant tube, e.g. shaped as a "P", "S”, “I”, “double P", “M” or "double U".
- Said radiant tube is supported by the furnace walls, on one side by an attachment flange and on the other by a radiant tube back support which rests on a surface of a furnace socket fixed to the furnace wall.
- WO-2011/044599 describes a radiant tube with a radiant tube back support resting on a surface of a furnace socket fixed to the wall of a furnace by means of a replaceable sliding plane.
- US-4520789 shows a radiant tube with a flange having a cavity slidingly associated with a tubular arm fixed to the furnace wall.
- said tubular arm is coated with a thermal insulating material.
- WO-2014072839 describes a radiant tube with a radiant tube back support provided with anti-sticking means, such as rolling means, or a coating comprising a low-friction material, or a carbon tungsten or zirconium based thermally treated material, or any other material having a given roughness, or a hardening material.
- JP-8327263 describes a low-friction coefficient coating to be applied to the portions of a heat exchanger in contact with the support walls of a furnace so as to prevent sticking phenomena.
- US-7678465 describes an anti-sticking coating comprising zirconium oxide, for steel subject to high temperatures.
- WO-99/14400 describes a heat exchanger comprising a protective coating which envisages zirconium.
- WO-2014072839 also discloses a corrugation or bellow or compensator adapted to absorb at least part of the thrust of a radiant tube on a radiant tube support in case of sticking thereof with the furnace side wall support, allowing the radiant tube to be subjected to expansion, like a sort of "bellow” regardless of the adherence, over a given distance without damaging the radiant tube.
- a radiant tube for furnaces for heat-treating sheets and other products made of steel or other material comprising at least one conduit supported by a flange fixed to a lateral wall of the furnace which allows the inlet and the outlet of heating hot fluid into/from the radiant tube, and at least one radiant tube back support suitable to rest on a surface of a furnace socket fixed to another wall of the furnace, characterized in that said radiant tube back support is tubular and has an outer surface comprising an alternating series of protrusions and recesses in sequence along the direction of a sliding axis of said radiant tube back support orthogonal to said wall of the furnace, so that the radiant tube back support rests on the surface of the furnace socket only at peak points of the protrusions.
- a radiant tube 1 for furnaces for heat-treating sheets and other products made of steel or other material has a "double P" shape envisaging a central conduit 2 in communication with two lateral conduits 3 by means of two fittings 4, 5 ( figures 1-3 ).
- the first fitting 4 is placed at a first end of the radiant tube 1 and is fixed to a lateral wall (not shown in the figures) of the furnace by means of a flange 6 which lets the hot heating fluid in/out from the radiant tube 1.
- the radiant tube back support 7 has a corrugated outer surface 71, i.e. which was subjected to an operation of corrugation.
- Said outer surface 71 has an alternating series of protrusions 72 and recesses 73 in sequence along the direction of a sliding axis L of said radiant tube back support 7, said axis L coinciding with the axis of the tubular radiant tube back support 7 and being orthogonal with respect to said lateral wall of the furnace.
- said axis L represents the prevalent sliding direction of the radiant tube back support 7 on the surface 81 of the furnace socket 8, the radiant tube back support 7 being able to slide along further directions, although these are, in all cases, secondary with respect to that of axis L.
- the corrugation pitch i.e. the distance between two consecutive protrusions 72 or two consecutive recesses 73
- the depth of the recesses 73 is either greater than or equal to 1 mm, preferably comprised between 2.5 mm and 3.5 mm.
- the corrugation pitch (distance between two consecutive protrusions 72 or two consecutive recesses 73) is about 40 mm, and the depth of the recesses 73 (distance between the peak 721 of a protrusion 72 and the bottom 731 of a recess 73) is about 3 mm.
- the length of the radiant tube back support 7 is comprised between 250 mm and 350 mm.
- the radiant tube back support 7 about 300 mm long.
- the depth of the recesses 73 which must be either greater than or equal to 1 mm to allow the radiant tube back support 7 to rest on the surface 81 of the furnace socket 8 only at the peak points 721 of the protrusions 72: consequently, the contact is punctiform, thus avoiding sticking phenomena.
- the presence of the alternating series of protrusions 72 and recesses 73 means that the radiant tube back support 7 may slide, without sticking, on said surface 81 of the furnace socket 8, and in particular that said radiant tube back support 7 can slide prevalently along the direction of the sliding axis L. A shallower depth would not prevent the sticking at very high temperatures.
- the depth of the recesses makes it possible to have a sufficient space to contain possible slag inside the furnace.
- the radiant tube back support 7 envisages through holes 75 to allow the release of possible overheating which could otherwise be generated in a closed chamber; preferably, the radiant tube back support 7 comprises four through holes 75 at 90°.
- the radiant tube back support 7 does not have any coating: it is only corrugated during the step of manufacturing of the radiant tube 1.
- the radiant tube back support 7 In order to limit the overheating of the radiant tube back support 7, it can be coated with a thermal insulating substance which comprises zirconium oxide (in percentage by weight higher than 90%) and yttrium oxide (in percentage by weight lower than 10%).
- a thermal insulating substance which comprises zirconium oxide (in percentage by weight higher than 90%) and yttrium oxide (in percentage by weight lower than 10%).
- Said substance creates a thermal barrier between the radiant tube back support 7 and the surface 81 of the furnace socket 8.
- said substance comprises ZrO 2 at 92% by weight and Y 2 O 3 at 8% by weight.
- said substance has a porosity percentage (by weight) comprised between 10 and 15, a micro-hardness (HV 300 ) comprised between 500 and 600, a binding capacity higher than 8 MPa and confers a roughness (Ra) comprised between 7 and 8 ⁇ m to the sprayed surface.
- said substance increases the corrosion resistance of the radiant tube back support 7 at high temperatures.
- FIGS 6-10 show further embodiments of the radiant tube 1 according to the invention, shaped as a "P", “S”, “I”, “M” and “double U”, with one or more radiant tube back supports 7 as described in the claims.
- the radiant tube back support 7 may have a different shape: it may have a non-circular section, e.g. a square or triangular section, or be flat.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Gas Burners (AREA)
- Combustion Of Fluid Fuel (AREA)
Description
- The present invention relates to a radiant tube with corrugated radiant tube back support.
- Furnaces for heat-treating sheets and other products made of steel and other materials are known, comprising, for example, a variably shaped radiant tube, e.g. shaped as a "P", "S", "I", "double P", "M" or "double U".
- Said radiant tube is supported by the furnace walls, on one side by an attachment flange and on the other by a radiant tube back support which rests on a surface of a furnace socket fixed to the furnace wall.
- The interaction between the radiant tube back support and the surface of the furnace socket makes it possible to compensate for movements of the radiant tube caused by temperature variations.
- The high temperatures which are reached by the furnace, as average between 700°C and 1200°C, determine a problem of adhesion of the radiant tube back support to said surface, with consequent "sticking" of the radiant tube, which thus breaks.
-
WO-2011/044599 describes a radiant tube with a radiant tube back support resting on a surface of a furnace socket fixed to the wall of a furnace by means of a replaceable sliding plane. -
US-4520789 shows a radiant tube with a flange having a cavity slidingly associated with a tubular arm fixed to the furnace wall. In order to limit the overheating, said tubular arm is coated with a thermal insulating material. -
WO-2014072839 describes a radiant tube with a radiant tube back support provided with anti-sticking means, such as rolling means, or a coating comprising a low-friction material, or a carbon tungsten or zirconium based thermally treated material, or any other material having a given roughness, or a hardening material. -
JP-8327263 -
US-7678465 describes an anti-sticking coating comprising zirconium oxide, for steel subject to high temperatures. -
WO-99/14400 - Disadvantageously, the sliding plane described in
WO-2011/044599 is subject to wear and therefore must be replaced with consequent stopping of the furnace which must be cooled down and then heated again. A similar problem relates to the rolling means described inWO-2014072839 . -
WO-2014072839 also discloses a corrugation or bellow or compensator adapted to absorb at least part of the thrust of a radiant tube on a radiant tube support in case of sticking thereof with the furnace side wall support, allowing the radiant tube to be subjected to expansion, like a sort of "bellow" regardless of the adherence, over a given distance without damaging the radiant tube. - In the other, wide use is made of radiant tube back support coatings, which in all cases imply a supplementary work of application on the radiant tube back support and a further research expense for finding the right coating, which is, in all cases, subject to wear after a given number of working cycles.
- It is the object of the present invention to make a radiant tube for furnaces for heat-treating sheets and other products made of steel or other material, with a radiant tube back support which does not stick to the surface of the furnace socket fixed to the wall of the furnace, which is simple to make, not subject to wear and which makes it possible to obtain long working cycles without needing to extinguish the furnace.
- According to the invention, such an object is reached by a radiant tube for furnaces for heat-treating sheets and other products made of steel or other material, comprising at least one conduit supported by a flange fixed to a lateral wall of the furnace which allows the inlet and the outlet of heating hot fluid into/from the radiant tube, and at least one radiant tube back support suitable to rest on a surface of a furnace socket fixed to another wall of the furnace,
characterized in that said radiant tube back support is tubular and has an outer surface comprising an alternating series of protrusions and recesses in sequence along the direction of a sliding axis of said radiant tube back support orthogonal to said wall of the furnace, so that the radiant tube back support rests on the surface of the furnace socket only at peak points of the protrusions. - These and other features of the present invention will be further apparent from the following detailed description of its embodiments thereof, shown by way of non-limitative example in the accompanying drawings, in which:
-
figure 1 shows in a top plan view of a "double P" radiant tube with a partially sectioned radiant tube back support; -
figure 2 shows a side view of the radiant tube infigure 1 ; -
figure 3 is a frontal view of the radiant tube infigure 1 ; -
figure 4 shows an enlarged section view of the radiant tube back support taken along the line IV-IV infigure 3 , with a cavity of a support fixed to a wall of a furnace; -
figure 5 shows a section view taken along the line V-V infigure 4 ; -
figure 6 shows a top plan view of an "S" shaped radiant tube; -
figure 7 shows a top plan view of an "I" shaped radiant tube; -
figure 8 shows a top plan view of a "P" shaped radiant tube; -
figure 9 shows a top plan view of an "M" shaped radiant tube; -
figure 10 shows a top plan view of a "double U" shaped radiant tube". - A radiant tube 1 for furnaces for heat-treating sheets and other products made of steel or other material has a "double P" shape envisaging a central conduit 2 in communication with two
lateral conduits 3 by means of twofittings 4, 5 (figures 1-3 ). - The
first fitting 4 is placed at a first end of the radiant tube 1 and is fixed to a lateral wall (not shown in the figures) of the furnace by means of aflange 6 which lets the hot heating fluid in/out from the radiant tube 1. - A tubular radiant
tube back support 7, suitable to rest on a surface 81 of afurnace socket 8 fixed to a second lateral wall of the furnace, is externally fixed at the second fitting 5 (figure 4 ). - The radiant
tube back support 7 has a corrugatedouter surface 71, i.e. which was subjected to an operation of corrugation. - Said
outer surface 71 has an alternating series ofprotrusions 72 andrecesses 73 in sequence along the direction of a sliding axis L of said radianttube back support 7, said axis L coinciding with the axis of the tubular radianttube back support 7 and being orthogonal with respect to said lateral wall of the furnace. Particularly, said axis L represents the prevalent sliding direction of the radianttube back support 7 on the surface 81 of thefurnace socket 8, the radianttube back support 7 being able to slide along further directions, although these are, in all cases, secondary with respect to that of axis L. - Preferably, the corrugation pitch (i.e. the distance between two
consecutive protrusions 72 or two consecutive recesses 73) is comprised between 35 mm and 45 mm, and the depth of the recesses 73 (distance between thepeak 721 of aprotrusion 72 and thebottom 731 of a recess 73) is either greater than or equal to 1 mm, preferably comprised between 2.5 mm and 3.5 mm. - Even more preferably, the corrugation pitch (distance between two
consecutive protrusions 72 or two consecutive recesses 73) is about 40 mm, and the depth of the recesses 73 (distance between thepeak 721 of aprotrusion 72 and thebottom 731 of a recess 73) is about 3 mm. - Preferably, the length of the radiant
tube back support 7 is comprised between 250 mm and 350 mm. - Even more preferably, the radiant tube back support 7 about 300 mm long.
- Fundamentally important is the depth of the
recesses 73, which must be either greater than or equal to 1 mm to allow the radiant tube back support 7 to rest on the surface 81 of thefurnace socket 8 only at thepeak points 721 of the protrusions 72: consequently, the contact is punctiform, thus avoiding sticking phenomena. The presence of the alternating series ofprotrusions 72 andrecesses 73 means that the radianttube back support 7 may slide, without sticking, on said surface 81 of thefurnace socket 8, and in particular that said radianttube back support 7 can slide prevalently along the direction of the sliding axis L. A shallower depth would not prevent the sticking at very high temperatures. - Advantageously, the depth of the recesses makes it possible to have a sufficient space to contain possible slag inside the furnace. Furthermore, the radiant
tube back support 7 envisages throughholes 75 to allow the release of possible overheating which could otherwise be generated in a closed chamber; preferably, the radianttube back support 7 comprises four throughholes 75 at 90°. - In the embodiment shown above, the radiant
tube back support 7 does not have any coating: it is only corrugated during the step of manufacturing of the radiant tube 1. - In order to limit the overheating of the radiant
tube back support 7, it can be coated with a thermal insulating substance which comprises zirconium oxide (in percentage by weight higher than 90%) and yttrium oxide (in percentage by weight lower than 10%). - Said substance creates a thermal barrier between the radiant
tube back support 7 and the surface 81 of thefurnace socket 8. - In an embodiment, said substance comprises ZrO2 at 92% by weight and Y2O3 at 8% by weight.
- Advantageously, said substance has a porosity percentage (by weight) comprised between 10 and 15, a micro-hardness (HV300) comprised between 500 and 600, a binding capacity higher than 8 MPa and confers a roughness (Ra) comprised between 7 and 8 µm to the sprayed surface.
- Furthermore, said substance increases the corrosion resistance of the radiant tube back support 7 at high temperatures.
- Two reinforcing
flaps 10, mounted obliquely with respect to the axis of the radianttube back support 7, are provided in order to improve the solidity of the radianttube back support 7. -
Figures 6-10 show further embodiments of the radiant tube 1 according to the invention, shaped as a "P", "S", "I", "M" and "double U", with one or more radiant tube back supports 7 as described in the claims. - The radiant
tube back support 7 may have a different shape: it may have a non-circular section, e.g. a square or triangular section, or be flat.
Claims (9)
- A radiant tube (1) for furnaces for heat-treating sheets and other products made of steel or other material, comprising at least one conduit (2) supported by a flange (6) fixed to a lateral wall of the furnace which allows the inlet and the outlet of heating hot fluid into/from the radiant tube (1), and by at least one radiant tube back support (7) suitable to rest on a surface (81) of a furnace socket (8) fixed to another wall of the furnace,
characterized in that said radiant tube back support (7) is tubular and has an outer surface (71) comprising an alternating series of protrusions (72) and recesses (73) in sequence along the direction of a sliding axis (L) of said radiant tube back support (7) which is orthogonal to said wall of the furnace, so that the radiant tube back support (7) rests on the surface (81) of the furnace socket (8) only at peak points (721) of the protrusions (72). - A radiant tube (1) according to claim 1, characterized in that the depth of the recesses (73) is either greater than or equal to 1 mm.
- A radiant tube (1) according to any of the preceding claims, characterized in that the radiant tube back support (7) is coated by a thermal insulating substance suitable for breaking the thermal bridge, which comprises zirconium oxide and yttrium oxide.
- A radiant tube (1) according to claim 3, characterized in that the zirconium oxide is in percentage by weight greater than 90% and the yttrium oxide is in percentage by weight lower than 10%.
- A radiant tube (1) according to claim 4, characterized in that said substance comprises ZrO2 at 92% by weight and Y2O3 at 8% by weight.
- A radiant tube (1) according to any of the preceding claims, characterized in that it is provided with two reinforcing flaps (10) for the radiant tube back support (7), obliquely mounted with respect to the axis of the radiant tube back support (7).
- A radiant tube (1) according to any of the preceding claims, characterized in that it comprises a central conduit (2) communicating with two lateral conduits (3) by means of two fittings (4, 5), said radiant tube back support (7) being provided at one fitting (5).
- A radiant tube (1) according to any of claims 1-6, characterized in that it is alternatively shaped as a "P", "S", "I", "M" and "double U".
- A radiant tube (1) according to any of the preceding claims, characterized in that said radiant tube back support (7) is provided with through holes (75) for circulating gas inside the radiant tube back support (7) itself.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITUB2015A002984A ITUB20152984A1 (en) | 2015-08-07 | 2015-08-07 | Radiant tube with corrugated shank. |
PCT/EP2016/067939 WO2017025333A1 (en) | 2015-08-07 | 2016-07-27 | Radiant tube with corrugated radiant tube back support |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3332203A1 EP3332203A1 (en) | 2018-06-13 |
EP3332203B1 true EP3332203B1 (en) | 2020-03-04 |
Family
ID=54477161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16745695.3A Active EP3332203B1 (en) | 2015-08-07 | 2016-07-27 | Radiant tube with corrugated radiant tube back support |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3332203B1 (en) |
CN (1) | CN108027213A (en) |
ES (1) | ES2792987T3 (en) |
IT (1) | ITUB20152984A1 (en) |
WO (1) | WO2017025333A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201800006668A1 (en) * | 2018-06-26 | 2019-12-26 | Massimiliano Bisson | SUPPORT DEVICE FOR RADIANT TUBES |
US11524136B2 (en) * | 2018-12-24 | 2022-12-13 | Biosense Webster (Israel) Ltd. | Non-invasive measurement of the pitch of a braid |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08278001A (en) * | 1995-04-04 | 1996-10-22 | Nippon Steel Corp | Mounting structure of radiant tube |
JP3549981B2 (en) * | 1996-05-08 | 2004-08-04 | 新日本製鐵株式会社 | Furnace support structure of radiant tube with alternating heat storage |
JP3855369B2 (en) * | 1997-05-26 | 2006-12-06 | Jfeスチール株式会社 | Radiant tube support device |
JP3327204B2 (en) * | 1998-03-10 | 2002-09-24 | 住友金属工業株式会社 | Radiant tube support structure |
KR20050017781A (en) * | 2003-08-08 | 2005-02-23 | 주식회사 케너텍 | Radiant tube support in furnace |
JP2005241144A (en) * | 2004-02-26 | 2005-09-08 | Jfe Steel Kk | Radiant tube type heating device |
DE202008009065U1 (en) * | 2008-07-04 | 2008-10-09 | WS Wärmeprozesstechnik GmbH | Radiant heating arrangement with delay compensation |
KR101025615B1 (en) * | 2009-06-18 | 2011-03-30 | 주식회사 세창엔지니어링 | Radiant tube |
AT508368B1 (en) * | 2009-10-13 | 2011-01-15 | Ebner Ind Ofenbau | DEVICE FOR HEAT TREATMENT OF TAPE BANDS |
CN101724744B (en) * | 2009-12-18 | 2011-07-06 | 孙立彬 | Double-P type radiant tube and manufacture method thereof |
US10011887B2 (en) * | 2013-01-02 | 2018-07-03 | Massimiliano Bisson | Support device for radiant tubes |
-
2015
- 2015-08-07 IT ITUB2015A002984A patent/ITUB20152984A1/en unknown
-
2016
- 2016-07-27 WO PCT/EP2016/067939 patent/WO2017025333A1/en active Application Filing
- 2016-07-27 CN CN201680046379.7A patent/CN108027213A/en active Pending
- 2016-07-27 ES ES16745695T patent/ES2792987T3/en active Active
- 2016-07-27 EP EP16745695.3A patent/EP3332203B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2017025333A1 (en) | 2017-02-16 |
ES2792987T3 (en) | 2020-11-12 |
CN108027213A (en) | 2018-05-11 |
EP3332203A1 (en) | 2018-06-13 |
ITUB20152984A1 (en) | 2017-02-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2818816B9 (en) | Multilayer cooling panel and electric arc furnace | |
EP2825831B2 (en) | Support device for radiant tubes | |
EP3332203B1 (en) | Radiant tube with corrugated radiant tube back support | |
US8257645B2 (en) | Insulation brick | |
US20160208374A1 (en) | Imc evaporator boat-thermal insulation cartridge assembly | |
CA3012536C (en) | Wall system with refractory bricks | |
CN206974175U (en) | A kind of energy saving temperature controlling industrial furnace | |
KR20160015545A (en) | Method and Apparatus for Drying Refractory of Boiler | |
JP6428692B2 (en) | Refractory structure | |
BRPI0418945A (en) | refractory composition and method of forming a monolithic refractory lining over a metallurgical vessel | |
JP2020106172A (en) | Heat insulation method for facility | |
RU2818427C1 (en) | Radiant heating element with free end | |
CN207702995U (en) | A kind of stove water cooling ceramic welding rifle | |
CN208391233U (en) | A kind of plasma transferred arc built-up welding incubator | |
CN209818540U (en) | Hollow guide rail structure capable of controlling temperature | |
JP7450628B2 (en) | Method and apparatus for extending the product life of stabilizers for coating lines | |
CN205014842U (en) | Prefab that heating furnace was used | |
EP0469230A1 (en) | Heat resistant alloy foil lining for kilns and method of lining kiln | |
CN106123018A (en) | Gas fired-boiler abnormity water wall structure | |
CN105605920A (en) | Resistance furnace | |
JPH0459366B2 (en) | ||
KR20120079543A (en) | High temperature refractories holder | |
JPH04138570U (en) | Immersion tube for metal melting |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20180305 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20190930 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 1240862 Country of ref document: AT Kind code of ref document: T Effective date: 20200315 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602016031088 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: E. BLUM AND CO. AG PATENT- UND MARKENANWAELTE , CH |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: FP |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200604 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200605 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200604 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200729 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200704 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2792987 Country of ref document: ES Kind code of ref document: T3 Effective date: 20201112 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602016031088 Country of ref document: DE |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 |
|
26N | No opposition filed |
Effective date: 20201207 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: UEP Ref document number: 1240862 Country of ref document: AT Kind code of ref document: T Effective date: 20200304 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200727 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200727 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20220621 Year of fee payment: 7 Ref country code: GB Payment date: 20220616 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: TR Payment date: 20220616 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20220801 Year of fee payment: 7 Ref country code: AT Payment date: 20220721 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20220801 Year of fee payment: 7 |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230421 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20230619 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20230621 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20230623 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20230927 Year of fee payment: 8 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MM Effective date: 20230801 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 1240862 Country of ref document: AT Kind code of ref document: T Effective date: 20230727 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20230727 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20230801 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20230727 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20230801 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20230727 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20230727 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20230731 |