Pipe connection for conducting a fluid that is under pressure

Patent metadata

Field	Value
Publication number	US-10514116-B2
Application number	US-201314435160-A
Country	US
Kind code	B2
Filing date	Oct 8, 2013
Priority date	Oct 15, 2012
Publication date	Dec 24, 2019
Grant date	Dec 24, 2019

Abstract

A pipe connection for conducting a fluid that is under pressure is provided, having two tubular connection parts for a conical clamping connection, which are screwed together by a union nut while one is inserted in the other, wherein each connection part has a conical sealing surface that contacts the other in a sealing manner and wherein an annular groove is provided in one of the sealing surfaces. In order to enable the pipe connection also to conduct a fluid having cycling or varying temperature, the inner of the two connection parts has thermal insulation on the inside of the pipe at least in the axial segment of the sealing surface of the connection part, wherein the thermal insulation tube has a cam or a collar on the outer surface, which engages in a recess, which is axially bounded by the two connection parts.

First claim

The invention claimed is:

1. A pipe connection for conducting a fluid that is under pressure, comprising
two pipes which are screwed together by means of a union nut, being plugged one into the other in a cone clamping connection,
wherein each pipe has a conical sealing face which respectively bears against the other of the two sealing faces,
wherein an inner one of the pipes has, at least in an axial section of a sealing face, a thermal barrier pipe inside the inner one of the pipes with an interspace between the thermal barrier pipe and the inner one of the pipes along the axial section,
wherein the thermal barrier pipe has, on a lateral surface, a protuberance or a collar which engages in a recess which is delimited axially by the two pipes.

2. The pipe connection as claimed in claim 1 ,
wherein at least one end of the thermal barrier pipe is formed as a close sliding fit.

3. The pipe connection as claimed in claim 2 ,
wherein both ends are formed as close sliding fits.

4. The pipe connection as claimed in claim 1 ,
wherein the union nut is prevented from coming loose.

5. The pipe connection as claimed in claim 4 ,
wherein the union nut is locked.

6. The pipe connection as claimed in claim 1 , further comprising
a graphite-containing seal arranged in an annular groove in one of the two sealing faces.

7. A method of using a pipe connection as claimed in claim 1 , comprising
conducting a fluid with a varying temperature or whose temperature deviates, at least briefly, from the temperature of the pipe connection by more than 100 K.

8. A pipe connection comprising:
two pipe sections joined by a cone clamping connection to define a passage for a fluid;
a first of the pipe sections comprising an outward-oriented conical sealing face and a second of the pipe sections comprising an inward-oriented conical sealing face, the respective sealing faces urged against each other along an axial section of the passage forming the cone clamping connection; and
a thermal barrier effective to slow a transfer of heat disposed between the passage and the first of the pipe sections along the axial section of the passage;
wherein the thermal barrier comprises a thermal barrier pipe; and
further comprising an interspace between the thermal barrier pipe and the first of the pipe sections along the axial section of the passage.

9. The pipe connection of claim 8 , further comprising a collar on an outer surface of the thermal barrier pipe which is axially fixed between the two pipe sections.

10. The pipe connection of claim 8 , further comprising a close sliding fit formed at opposed axial ends of the thermal barrier pipe to limit ingress of the fluid into the interspace.

11. The pipe connection of claim 8 , further comprising an annular groove formed in at least one of the conical sealing faces.

12. The pipe connection of claim 11 , further comprising a sealing element disposed in the annular groove.

13. The pipe connection of claim 12 , wherein the sealing element comprises graphite.

14. A pipe connection comprising:
two pipe connection pieces joined by a cone clamping arrangement to define a passage for a fluid;
a first of the pipe connection pieces comprising an outward-oriented conical sealing face and a second of the pipe connection pieces comprising an inward-oriented conical sealing face, the respective sealing faces urged against each other along an axial section of the passage by the cone clamping arrangement;
a thermal barrier pipe disposed within the passage and separated from the first of the pipe connection pieces by an interspace along the axial section of the passage; and
a radial widening of the thermal barrier pipe formed proximate at least one end of the thermal barrier pipe effective to establish a contact between the thermal barrier pipe and the first of the pipe connection pieces.

15. The pipe connection of claim 14 , further comprising a collar on a surface of the thermal barrier pipe which is axially delimited between the two pipe connection pieces.

Assignees

• Siemens Ag

Inventors

• Bottcher Andreas
• Dumler Hartwig
• Hesse Werner
• Kock Boris Ferdinand
• Lapp Patrick
• Otte Lars
• Seidel Falk
• Stapper Philipp
• Staring Sascha
• Weber Gerd

Classifications

• F16L59/18

  adapted for joints · CPC title

• F16L59/00

  Thermal insulation in general · CPC title

• F16L59/181 Primary

  Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts · CPC title

• F16L19/00 Primary

  Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts (F16L17/00 takes precedence; if using bolts or equivalent connecting means F16L23/00; connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics F16L47/00 {; specially adapted for pipes of brittle material F16L49/06}) · CPC title

• F16L19/005

  comprising locking means for the threaded member · CPC title