HEATABLE MEDIA LINE

Abstract

A heatable media line is characterized by a connecting part (4), which establishes an electrical connection, and serves to introduce a heat conductor (14) into a media line section (5). A connection of the heat conductor (14) with contact-forming parts is set up in an end part (10), and the heat conductor (14) is tightly accommodated in boreholes (11, 12) of a coupling part (9) by means of two sealing bodies (15, 16) spaced apart from each other, as well as introduced into the media line section (5) by way of a supporting body (19) for purposes of heating a medium flowing in the latter. In order to produce a reliable seal intended to prevent the medium from penetrating into the end part (10), and associated herewith the potential generation of a short circuit between electrically conductive parts, it is provided that recesses (17, 18) in the walls of the coupling part (9) and an interruption of a creepage distance be set up between the sealing bodies (15, 16), by means of which the heat conductor (14) is directly connected with the surrounding atmosphere.

Claims

1. A heatable media line with a connecting link for a connecting part (4), which forms a media line section (5) and is set up as an electrical connection, for heat conductors (14) incorporated inside of the media line section (5), wherein the heat conductors (14) are tightly accommodated inside of the connecting part (4) in boreholes (11, 12) of a filler body, specifically tightly accommodated in at least two sealing bodies (15, 16) spaced apart from each other in their longitudinal direction, in the process leaving a free region of the heat conductors (14) between the facing ends of the sealing body (15, 16) not covered by the latter, characterized in that the free region of the heat conductors (14) is continuously connected with the surrounding atmosphere.

2. The media line according to claim 1, characterized in that the connecting part (4) consists of a connecting element (7) directly connected with the media line section (5), an end part (10) intended for accommodating elements that impart an electrical contact, and boreholes (10, 12) that connect the latter for accommodating the coupling piece (9) containing the sealing bodies (15, 16).

3. The media line according to claim 2, characterized in that the coupling piece (9) is inserted into the ends of the connecting element (7) and end part (10) that face the latter, thereby leaving a free section (13) between the latter, and otherwise forming a filler body inside the connecting element (7) and end part (10).

4. The media line according to claim 1, characterized in that the sealing bodies (15, 16) are profiled on the exterior side.

5. The media line according to claim 1, characterized in that the boreholes (11, 12) exhibit a tapering section on their ends facing the free region of the heat conductors (14).

6. The media line according to claim 2, characterized in that the coupling piece (9) is provided with at least two recesses (17, 18) for establishing a connection between the free region of the heat conductors (14) and the surrounding atmosphere.

7. The media line according to claim 6, characterized in that the ends of the boreholes (11, 12) that face the recesses (17, 18) each exhibit a section that tapers in the direction toward the latter, and that the exterior profiling of the sealing bodies (15, 16) is set up with the understanding that the sealing bodies (15, 16) can only be inserted into the boreholes (11, 12) in one direction.

8. The media line according to claim 1, characterized by a supporting body (19) that is situated in the transitional area from the connecting part (4) to the media line section (5) and meant to centrally guide the heat conductors (14).

9. The media line according to claim 8, characterized in that the supporting body (19) is dimensioned and inserted into the connecting part (4) with the understanding that the sealing body (15) is placed under a mechanical prestress in the direction toward the tapering section of the borehole (11).

10. The media line according to claim 2, characterized in that the sealing bodies (15, 16) are profiled on the exterior side.

11. The media line according to claim 3, characterized in that the sealing bodies (15, 16) are profiled on the exterior side.

12. The media line according to claim 2, characterized in that the boreholes (11, 12) exhibit a tapering section on their ends facing the free region of the heat conductors (14).

13. The media line according to claim 3, characterized in that the boreholes (11, 12) exhibit a tapering section on their ends facing the free region of the heat conductors (14).

14. The media line according to claim 4, characterized in that the boreholes (11, 12) exhibit a tapering section on their ends facing the free region of the heat conductors (14).

15. The media line according to claim 3, characterized in that the coupling piece (9) is provided with at least two recesses (17, 18) for establishing a connection between the free region of the heat conductors (14) and the surrounding atmosphere.

16. The media line according to claim 4, characterized in that the coupling piece (9) is provided with at least two recesses (17, 18) for establishing a connection between the free region of the heat conductors (14) and the surrounding atmosphere.

17. The media line according to claim 5, characterized in that the coupling piece (9) is provided with at least two recesses (17, 18) for establishing a connection between the free region of the heat conductors (14) and the surrounding atmosphere.

18. The media line according to claim 15, characterized in that the ends of the boreholes (11, 12) that face the recesses (17, 18) each exhibit a section that tapers in the direction toward the latter, and that the exterior profiling of the sealing bodies (15, 16) is set up with the understanding that the sealing bodies (15, 16) can only be inserted into the boreholes (11, 12) in one direction.

19. The media line according to claim 2, characterized by a supporting body (19) that is situated in the transitional area from the connecting part (4) to the media line section (5) and meant to centrally guide the heat conductors (14).

20. The media line according to claim 3, characterized by a supporting body (19) that is situated in the transitional area from the connecting part (4) to the media line section (5) and meant to centrally guide the heat conductors (14).

Description

[0017] The invention will be explained in more detail below with reference to the exemplary embodiment schematically depicted in the drawings. Shown on:

[0018] FIG. 1 is a perspective view of a line element according to the invention;

[0019] FIG. 2 is a perspective partial view of the line element according to FIG. 1;

[0020] FIG. 3 is a planar view of a line element according to the invention as seen from viewing direction III on FIG. 4;

[0021] FIG. 4 is a view of the line element according to a sectional plane IV-IV on FIG. 3.

[0022] Exemplarily marked 1 on FIG. 1 is a heatable, angled line element, which consists of coupling pieces 2, 3 on the end sides, a connecting part 4 intended to be connected with a voltage source, a straight media line section 5 and an elbow 6.

[0023] The coupling pieces 2, 3 are intended for use in a known manner for establishing a connection with adjoining line sections, but this will not be discussed in any more detail below.

[0024] The connecting part 4 serves to establish an electrical connection between an outer voltage source and a heat conductor (not depicted on FIGS. 1 and 2) guided inside the media line section 5 with the assistance of spacers, which can be arranged in the form of a closed loop. In the exemplary embodiment shown, the connecting part 4 can comprise a structural unit with the coupling piece 2.

[0025] The connections between the coupling pieces 2, 3, the connecting part 4 and the media line section 5 can be fabricated by welding.

[0026] FIGS. 2 to 4 show correspondingly labeled functional elements corresponding to those on FIG. 1, thus eliminating the need for a repeated description in this regard.

[0027] The connecting part 4 consists of a cylindrical connecting element 7, which branches from the media line 5 in the form of a T and is continuously connected with the media line 5 via a lower opening 8, a coupling piece 9 inserted into the end facing away from the media line 5, and an end part 10 that establishes an electrical interface.

[0028] The coupling piece 9 is provided with a first central borehole 11 that tapers in its upper section and extends parallel to the axis of the connecting element 7, and a central second borehole 12 that tapers in a lower section and extends coaxially to the borehole 11. The coupling piece 9 is inserted into the connecting element 7 and end part 10 with the understanding that it can be freely accessed at least partially from the outside in a roughly central section 13.

[0029] Marked 19 is a supporting body, which is supported on an interior, annular supporting surface 21 of the connecting element 7 by way of an annular flange 20, and on which rests the coupling piece 9. This supporting body 19 fixes the insertion position of the coupling piece 9 inside of the connecting element 7 axially in the direction toward the media line section 5.

[0030] A connection can be set up between the connecting element 7, the coupling piece 9 and the end part 10 in basically any manner familiar to the expert, thus eliminating the need for any more detailed explanations in this regard.

[0031] Marked 14 is a heat conductor, which starts from the end part 10, and extends through the coupling piece 9, in particular the boreholes 11, 12 as well as the supporting body 19, and into the media line section 5. The heat conductor 14 runs inside of the media line section 5, thereby forming a radially supported loop in a known manner. In addition, the supporting body 19 sets up a central guide for the heat conductor(s) 14 inside of the connecting element 7.

[0032] A sealing body 15 profiled on the exterior side is inserted into the borehole 11 from a lower side, tightly enveloping the heat conductor, and protrudes slightly from the borehole 11 in the area of section 13. A sealing body 16 profiled on the exterior side is inserted into the borehole 12 from an upper side, tightly enveloping the heat conductor, and protrudes slightly from the borehole 12 in the area of section 13.

[0033] The supporting body 19 is arranged in such a way as to abut against the facing side of the sealing body, thereby placing the latter under a mechanical prestress in the direction toward the tapering section of the borehole. In this way, the sealing effect of a stuffing box is established in addition to the exterior profiling of the sealing body 15.

[0034] The coupling piece 9 exhibits two recesses 17, 18 in the section 13, specifically in the region in which the ends of the sealing bodies 15, 16 lie opposite each other spaced a distance apart. Set up at this location is a free region of the heat conductor(s), which is not taken up by a sealing body 15, 16, and also not by parts of the coupling piece 9. As a consequence, this location has a continuous connection between the heat conductor 14/heat conductors 14 and the surrounding atmosphere.

[0035] Inside of the end part 10, the heat conductor 14 is connected in a known manner with contact-imparting elements, wherein elements of a plug connection are involved, for example, with which a connection to an external voltage source can be established.

[0036] As a consequence, should creepage of the medium take place in the media line section 5, defeating the supporting body 19 and sealing body 15 in the process, the recesses 17, 18 in contact with the surrounding atmosphere, which interrupt a creepage distance in the direction toward the internal space of the end part 10, ensures that the medium that advanced in the free region of the heat conductor 14 can be discharged via the recesses 17, 18, so that further creepage cannot take place over the adjoining sealing body 16 in the direction toward live electrical parts inside of the end part 10, thereby potentially triggering an electrical short circuit.

TABLE-US-00001 Reference List: 1. Line element 2. Coupling piece 3. Coupling piece 4. Connecting part 5. Media line section 6. Elbow 7. Connecting element 8. Opening 9. Coupling piece 10. End part 11. Borehole 12. Borehole 13. Section 14. Heat conductor 15. Sealing body 16. Sealing body 17. Recess 18. Recess 19. Supporting body 20. Annular flange 21. Supporting surface