Holding device for a heating element, and heater

Abstract

A holding device for a heating element and a heater with at least one such holding device. The holding device is produced from a refractory metal or from an alloy on the basis of refractory metal, has at least two holding elements which are arranged perpendicularly or at least substantially perpendicularly to each other. A first holding element is at least partially arranged in an opening of a second holding element.

Claims

1. A holding device for a heating element, the holding device comprising: a refractory metal or an alloy based on refractory metal; at least two holding elements including a first holding element and a second holding element arranged perpendicularly or substantially perpendicularly to one another; said first holding element being at least partially arranged in an opening formed in said second holding element; and said first holding element includes a deformation fastening said first holding element to said second holding element.

2. The holding device according to claim 1, wherein said deformation is a cold deformation.

3. The holding device according to claim 1, wherein said first and second holding elements are not welded to each other.

4. The holding device according to claim 1, wherein the holding device is a current-conduction element.

5. The holding device according to claim 4 configured to form a current connection for a heating element that is fastenable to the holding device.

6. The holding device according to claim 1, wherein at least one of said holding elements is formed as a single part.

7. The holding device according to claim 6, wherein said single part has a form selected from the group consisting of a bar, a square profile and a polygonal profile.

8. The holding device according to claim 1, wherein said first holding element is configured for fastening the holding device in a furnace chamber.

9. The holding device according to claim 1, which further comprises a third holding element fastened to said second holding element.

10. The holding device according to claim 9, wherein said second and third holding elements are connected to one another by way of a form-locking and/or force-fitting connection.

11. The holding device according to claim 10, wherein said second and third holding elements are not connected to one another in an integrally bonded manner.

12. The holding device according to claim 9, wherein said second holding element or said third holding element is configured to fasten a heating element suspended therefrom.

13. The holding device according to claim 12, wherein said heating element suspended from said second or third holding element is at least one meshwork, at least one plate, and/or a multiplicity of wires.

14. The holding device according to claim 1, formed of tungsten or of an alloy based on tungsten.

15. A heater, comprising: at least one holding device according to claim 1 and at least one heating element connected to one other in a current-conductive manner.

16. The holding device according to claim 1, wherein said first holding element is held on one side of said second holding element, said deformation of said first holding element is a portion of said first holding element that protrudes from an opposite side of said second holding element and that is cold-deformed to fasten said first holding element to said second holding element.

17. The holding device according to claim 1, which further comprises a third holding element fastened to said second holding element, said third holding element configured to fasten a heating element suspended therefrom.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

(1) An embodiment of the invention is explained in more detail with reference to the figures, in which:

(2) FIGS. 1a-b show perspective views of a holding device,

(3) FIG. 2 shows an exploded view of the holding device of FIGS. 1a-b, and

(4) FIGS. 3a-c show side views and a top view of the holding device from FIGS. 1a-b.

DESCRIPTION OF THE INVENTION

(5) FIGS. 1a-b show perspective views of a holding device 2 according to a preferred refinement. The holding device 2 is formed from a first, second and third holding element 4, 6, 8, which holding elements are connected to one another and are produced from a refractory metal or an alloy on the basis of refractory metal, for example tungsten or molybdenum. The holding device 2 is current-conductive and is used for the current supply of a heating element 18 (or more than one heating element 18), which heating elements can be fastened to the holding device 2 (in a suspended manner). The heating element 18 which is illustrated in sketched form in FIG. 1a is formed, for example, from a tungsten net, a plate or a multiplicity of wires (running vertically).

(6) When the holding device 2 is used, the holding device is fastened in a furnace chamber (not illustrated), by fastening of the first holding element 4 or of the support in the furnace chamber, for example, by means of a clamping connection or by means of screws. That is to say, after the installation, the holding device 2 or the heating element 18 is arranged in the furnace chamber in a suspended manner (on the first holding element 4). The heating element 18 is fastened to the third holding element 8, for example by means of a clamping connection and/or welded joint, in order to ensure good electrical contact.

(7) FIG. 2 shows an exploded view of the holding device 2 from FIG. 1 in order to illustrate the connection of the three holding elements 4, 6, 8. The holding elements 4, 6, 8 are produced from solid material or are produced not by bevelling plates. The first holding element 4 has, at one end, a pin 12 which is inserted into a correspondingly designed opening 10 in the second holding element 6. The pin 12 is subsequently deformed by means of cold deformation, such as, for example, tumbling, and therefore the first and second holding elements 4, 6 are securely connected to each other.

(8) After the connection of the first and second holding elements 4, 6, the third holding element 8 is connected to the second holding element 6 by means of four rivets 16a-d.

(9) That is to say, in this refinement of the holding device 2, the individual elements do not need to be welded, and therefore the disadvantages of welding (microcrack formation, structural embrittlement) can be circumvented.

(10) Two bevels 14a-b can optionally be arranged on the first holding element 4, said bevels, after the plugging together, lying adjacent to the second holding element 6. The bevels 14a-b can receive a weld seam in order additionally to secure the connection between the two holding elements 4, 6, wherein the location of the weld seam lies outside or substantially outside the location of the mechanical loading during the use of the holding device. That is to say, the weld seam or weld seams are sufficiently spaced apart from the connection (opening 10/pin 12) between first and second holding elements, and therefore the welding does not have any negative effect on the connection.

(11) FIGS. 3a-c show side views and a top view of the above-described holding device 2. The exemplary holding device 2 is designed for use in a cylindrical furnace chamber; in particular, three of the depicted holding devices 2 are required in order therefore to heat a cylindrical furnace chamber by means of the corresponding heating elements 18. For this purpose, at least the third holding element 8 or the heating element support is produced from a bent plate, the curvature of which is matched to the dimensions of the furnace chamber.

(12) A furnace chamber can have any cross section, for example rectangular, oval, etc. The third holding element 8 can correspondingly be matched to the different dimensions of the furnace chamber and of the heating elements. That is to say, during the production of the holding device, first of all units consisting of the first and second holding elements can be produced, for example, before actually being required. The holding device is matched to the corresponding dimensions of a furnace chamber and of a heating element only with the fastening of the correspondingly dimensioned third holding element, i.e. the third holding element has, for example, a certain curvature and a certain length. Since the third holding element 8 can be connected in a simple and rapid manner to the second holding element 6 by means of rivets 16a-d, holding devices 2 can thereby be adapted according to the modular principle rapidly and simply to the respective use.

(13) According to an alternative refinement which is not illustrated here, the holding device is only produced from a first and second holding element, wherein the second holding element is designed or has corresponding dimensions for the fastening of a heating element 18 thereto.

LIST OF REFERENCE NUMBERS

(14) 2 Holding device 4 First holding element 6 Second holding element 8 Third holding element 10 Opening 12 Pin 14a-b Bevel 16a-d Rivet 18 Heating element