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CN-114829839-B - Radiant heating element with free end

CN114829839BCN 114829839 BCN114829839 BCN 114829839BCN-114829839-B

Abstract

A radiant element (1) for a heating oven (200), comprising-a first end (7), -a second free end (8), -a radiant structure (2) located between the first end (7) and the second end (8), -a conduit (5) for supplying energy to the interior of the radiant structure (2), -a first fastening leg (20) for mechanically coupling the radiant structure (2) to a support (3), the first coupling means (25) comprising a first portion (25 a) arranged to be fastened to the support (3) and a second portion (25 b) fixed to the first leg (20), wherein the first portion (25 a) and the second portion (25 b) are mechanically coupled by a first interface (25 c) such that a relative displacement between the first portion (25 a) and the second portion (25 b) is enabled.

Inventors

  • Wan Long Hou ang
  • Alexander Lhost
  • Olivier Pansis

Assignees

  • 德勒沃国际公司

Dates

Publication Date
20260505
Application Date
20201209
Priority Date
20191210

Claims (16)

  1. 1. A radiant element (1) for being arranged on a vertical first wall (71) of an oven (200) and comprising: -a first end (7) located at a first side (501) of the radiating element (1); -a second end (8) located at a second side (502) of the radiating element (1), the second side (502) being opposite to the first side (501); -a radiant structure (2) for heating inside the oven (200) and located between the first end (7) and the second end (8); -a duct (5) for the energy supply inside the radiating structure (2), the duct (5) being located at the first side (501) of the radiating element (1); A first attachment leg (20) for mechanically coupling the radiating structure (2) to a support (3) on the first wall (71), the first attachment leg (20) being located on the first side (501) of the radiating element (1), and -First coupling means (25) for mechanically coupling the first attachment leg (20) to the support (3); characterized in that the second end (8) is free, and The first coupling means (25) comprises: A first portion (25 a) arranged stationary with respect to the support (3), and -A second portion (25 b) stationary with respect to the first attachment leg (20), the first portion (25 a) and the second portion (25 b) being mechanically coupled by a first interface (25 c), the first interface (25 c) being located entirely within the oven (200) and enabling relative displacement between the first portion (25 a) and the second portion (25 b) in one or more directions.
  2. 2. The radiant element (1) according to claim 1, arranged such that the temperature of the first interface (25 c) is lower than the temperature of the interior of the oven (200).
  3. 3. The radiant element (1) according to claim 2, comprising a heat insulator (73) arranged to form a heat insulation between the interior of the radiant structure (2) and/or the oven (200) on the one hand and the first interface (25 c) on the other hand.
  4. 4. A radiating element (1) according to any one of claims 1 to 3, characterized in that the first attachment leg (20) is arranged to be supported on the support (3) or to be pulled on the support by the first coupling means (25).
  5. 5. A radiant element (1) according to any one of claims 1 to 3, characterized in that the first coupling means (25) enable a relative displacement between the first attachment leg (20) and the support (3) parallel to the first wall (71).
  6. 6. A radiant element (1) according to any one of claims 1 to 3, characterized in that the first interface (25 c) enables sliding and/or rolling of the second portion (25 b) with respect to the first portion (25 a).
  7. 7. A radiating element (1) according to any one of claims 1-3, characterized in that the first attachment leg (20) comprises a first leg wall (202 a;202 b) between the radiating structure (2) and the first coupling means (25) in a manner that extends the radiating structure (2) and/or in a manner that forms an envelope of at least part of the radiating structure (2).
  8. 8. A radiating element (1) according to any one of claims 1 to 3, characterized in that the second portion (25 b) of the first coupling means (25) comprises a vertical first leg end plate (209).
  9. 9. A radiating element (1) according to any one of claims 1 to 3, characterized in that it comprises a second attachment leg (10) for mechanically coupling the radiating structure (2) to the support (3), and a second coupling means (15) for mechanically coupling the second attachment leg (10) to the support (3); The second attachment leg (10) is positioned around the pipe (5) or on a different side of the pipe (5) than the first attachment leg (20); the second coupling device (15) comprises: a first portion (15 a) arranged stationary with respect to the support (3), and -A second portion (15 b) stationary with respect to the second attachment leg (10), the first portion (15 a) and the second portion (15 b) being mechanically coupled by a second interface (15 c) to enable relative displacement between the first portion (15 a) and the second portion (15 b).
  10. 10. The radiating element (1) according to claim 9, characterized in that at least one of the first attachment leg (20) and the second attachment leg (10) comprises at least one opening (51, 52, 53).
  11. 11. The radiating element (1) according to claim 9, characterized in that the second attachment leg (10) comprises a second leg wall (102 a;102 b) between the radiating structure (2) and the second coupling means (15) in such a way that it extends the radiating structure (2) and/or forms an envelope of at least part of the radiating structure (2).
  12. 12. A kiln section (100) of a kiln (200) comprising a vertical first wall (71) of the kiln and a radiant element (1) according to any of claims 1 to 11, the support (3) of the radiant element (1) being located only on the first wall (71) of the kiln.
  13. 13. The oven segment (100) according to claim 12, characterized in, that the first attachment leg (20) is positioned lower than the duct (5).
  14. 14. The oven segment (100) according to claim 12, characterized in that the support (3) of the radiating element (1) is attached only to the first wall (71) of the oven.
  15. 15. An oven (200) comprising a plurality of radiant elements (1) according to any one of claims 1 to 11, or a plurality of oven sections (100) according to any one of claims 12 to 14.
  16. 16. A method for attaching a radiating element (1) to a vertical first wall (71) of an oven (200) for heat treating a product (99), the method comprising the steps of: a. -providing a radiating element (1), comprising: -a first end (7) located at a first side (501) of the radiating element (1); -a second end (8) located at a second side (502) of the radiating element (1), the second side (502) being opposite to the first side (501); -a radiant structure (2) for heating inside the oven (200) and located between the first end (7) and the second end (8); -a duct (5) for the energy supply inside the radiating structure (2), the duct (5) being located at the first side (501) of the radiating element (1); A first attachment leg (20) at the first side (501) of the radiating element (1), and -First coupling means (25) comprising: A first part (25 a), and -A second portion (25 b) stationary with respect to the first attachment leg (20), the first portion (25 a) and the second portion (25 b) being adapted to be mechanically coupled by a first interface (25 c) to enable relative displacement between the first portion (25 a) and the second portion (25 b); b. -arranging the radiating element (1) on the first wall (71) such that: The second end (8) is free; -the first attachment leg (20) mechanically couples the radiating structure (2) to a support (3) on the first wall (71); -said first coupling means (25) mechanically coupling said first attachment leg (20) to said support (3); The first portion (25 a) of the first coupling means (25) being stationary with respect to the support (3), and The second portion (25 b) of the first coupling means (25) is mechanically coupled to the first portion (25 a) by the first interface (25 c) to enable relative displacement between the first portion (25 a) and the second portion (25 b).

Description

Radiant heating element with free end Technical Field The present invention relates to a radiant heating element for heat treating a product, more particularly a metal product. The invention also relates to a method for attaching a radiant heating element in an oven for heat treating a product, more particularly a metal product. Background Ovens for the heat treatment of metal products in strip form generally comprise a series of radiant-heating pipes arranged in vertical and/or horizontal columns one above the other and/or adjacent to each other. Typically, the product to be treated is transported vertically and/or horizontally in front of and/or between the radiant-heating pipes from which heat is radiated. Each radiant-heating pipe comprises a heat source, which may for example be in the form of a burner having at least one inlet for a combustible product, at least one inlet for an oxidizing agent and at least one outlet for the combustion product, so that, whether or not there is a heat recovery system, the burner, by being fed with the combustible product and the oxidizing agent, generates a flame in the radiant element from which heat is then radiated towards the metal product to be treated. The radiant-heating pipes used for heating a metal product over its entire width and depth are generally elongated elements delimited by two ends and supported by each of the two ends of the elongated element between two walls of the oven. In practice, the radiant-heating pipe has a first means for attachment to a first wall of the oven at a first end of the radiant-heating pipe, the first wall comprising a supply for a heat source, and a second means for attachment at a second end of the radiant-heating pipe. A known problem with radiant-heating pipes of this type is their limited service life. In fact, this support mode associated with high temperatures can cause seizing and structural deformations in the radiant-heating pipe, which can aggravate the ageing of the radiant-heating pipe after the creep phenomenon. Indeed, it is generally observed that relaxation of the harvest is closely related to an increase in deformation. This increase causes an eccentricity which results in an increase in the convergence. One known solution aimed at limiting the structural convergence and deformation in radiant-heating pipes is to have the second attachment means with one or more degrees of freedom at the wall of the oven opposite the heat supply. An advantage of having the second attachment means with one or more degrees of freedom is that some thermo-mechanical constrictions are reduced. This is especially the case for radiant-heating pipes as described in documents US1001188782 and JP2001330209 a. In addition, it is desirable to simplify maintenance of ovens comprising radiant-heating pipes, especially since the structural convergence is still high, and the heating pipes must be replaced regularly. Still other radiant-heating pipes are designed to be attached below a horizontal wall. A radiant tube of this type is described in document JP 2005069595A. Disclosure of Invention It is an object of the present invention to provide a radiant heating element for being arranged on a vertical wall and enabling reduced maintenance and particularly easy maintenance. To this end, the inventors propose a radiant element for being arranged on a vertical first wall of a kiln and comprising: -a first end portion located at a first side of the radiating element; -a second end located on a second side of the radiating element, the second side being opposite to the first side; -a radiating structure for heating inside the oven and located between the first end and the second end; -a duct for energy supply to the interior of the radiating structure, the duct being located on a first side of the radiating element; A first attachment leg for mechanically coupling the radiating structure to a support on the first wall, the first leg being on a first side of the radiating element, and -First coupling means for mechanically coupling the first leg to the support; characterized in that the second end is free, and The first coupling device includes: -a first portion arranged stationary with respect to the support, and -A second part stationary relative to the first leg, the first and second parts being mechanically coupled by a first interface to enable relative displacement between the first and second parts. The first coupling means enable a relative displacement between the first leg and the support. This enables to reduce or eliminate the pinching caused by the deformation of the radiating element (e.g. due to thermal expansion/contraction). The invention makes it possible to mechanically couple the radiating structure to a support (which is itself located on the vertical wall) on only one side of the first end of the radiating element. The invention thus differs from the known system in which the radiating element is attached by its two ends to