Thermally insulating protective sleeve

Patent metadata

Field	Value
Publication number	US-10526949-B2
Application number	US-201815878638-A
Country	US
Kind code	B2
Filing date	Jan 24, 2018
Priority date	Jan 24, 2017
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

A thermally insulating protective sleeve. The thermally insulating protective sleeve comprises a tubular shell and a thermally insulating liner located in the tubular shell and made of a thermally insulating soft material. The shell comprises two longitudinally separated half-parts, the two half-parts being detachably connected to each other. The thermally insulating liner defines a hollow opening in the shell, and an object to be thermally insulated can be received in the hollow opening in such a way that the thermally insulating liner is subjected to pressure in a radial direction.

First claim

The invention claimed is:

1. A thermally insulating protective sleeve ( 10 ) comprising an annular, hard tubular shell ( 11 ) and a thermally insulating two-part liner ( 12 ) located in the tubular shell, the shell being of a hardness greater than that of the thermally insulating liner, and the shell comprising two longitudinally separated half-parts, the two half-parts being detachably connected to each other, the thermally insulating liner defining a hollow opening ( 13 ) in the shell, wherein the liner is configured such that an object to be thermally insulated can be received in the hollow opening ( 13 ) in such a way that the thermally insulating liner ( 12 ) is subjected to an evenly distributed pressure in a radial direction, wherein a semi-annular sidewall is integrally formed at at least one longitudinal end of each half-part of the shell, a radial dimension of the sidewall being greater than a wall thickness of the shell but less than the thickness of the thermally insulating liner, and wherein the thermally insulating protective sleeve encloses a liquid discharge port and/or a connector at the liquid discharge port of a urea solution supply pump of a selective catalytic reduction after-treatment system.

2. A thermally insulating protective sleeve according to claim 1 , characterized in that the thermally insulating liner ( 12 ) is adhered to an inside wall of the shell ( 11 ).

3. A thermally insulating protective sleeve according to claim 1 , characterized in that the thermally insulating liner ( 12 ) comprises two longitudinally separated half-parts.

4. A thermally insulating protective sleeve according to claim 1 , characterized in that the shell ( 11 ) comprises a hinge part ( 11 a ) which pivotably connects the two half-parts to each other, and a fastening structure which locks the two half-parts together releasably, wherein when viewed from the direction of a cross section of the shell ( 11 ), the fastening structure is disposed diametrically opposite the hinge part.

5. A thermally insulating protective sleeve according to claim 4 , comprising multiple said hinge parts ( 11 a ), separated from each other longitudinally; and/or multiple said fastening structures, separated from each other longitudinally.

6. A thermally insulating protective sleeve according to claim 5 , characterized in that each fastening structure comprises a fastening ring part ( 15 a ) disposed on one half-part of the shell, and a protrusion ( 15 b ) disposed on the other half-part, the fastening ring part having an opening capable of mating with the protrusion.

7. A thermally insulating protective sleeve according to claim 6 , characterized in that the shell ( 11 ) is made of PA 66, and/or; the thermally insulating liner ( 12 ) is made of a PVC/NBR rubber/plastic blend, the shell being of a hardness greater than that of the thermally insulating liner.

8. A thermally insulating protective sleeve according to claim 7 , characterized in that the object to be thermally insulated is a liquid discharge port of a urea solution supply pump of a selective catalytic reduction after-treatment system, and/or a connector for connecting to the liquid discharge port.

9. A thermally insulating protective sleeve according to claim 2 , characterized in that the thermally insulating liner ( 12 ) comprises two longitudinally separated half-parts.

10. A thermally insulating protective sleeve according to claim 9 , characterized in that the shell ( 11 ) comprises a hinge part ( 11 a ) which pivotably connects the two half-parts to each other, and a fastening structure which locks the two half-parts together releasably, wherein when viewed from the direction of a cross section of the shell ( 11 ), the fastening structure is disposed diametrically opposite the hinge part.

11. A thermally insulating protective sleeve according to claim 10 , characterized in that there are multiple said hinge parts ( 11 a ), separated from each other longitudinally; and/or there are multiple said fastening structures, separated from each other longitudinally.

12. A thermally insulating protective sleeve according to claim 11 , characterized in that each fastening structure comprises a fastening ring part ( 15 a ) disposed on one half-part of the shell, and a protrusion ( 15 b ) disposed on the other half-part, the fastening ring part having an opening capable of mating with the protrusion.

13. A thermally insulating protective sleeve according to claim 12 , characterized in that the shell ( 11 ) is made of PA 66, and/or; the thermally insulating liner ( 12 ) is made of a PVC/NBR rubber/plastic blend, the shell being of a hardness greater than that of the thermally insulating liner.

14. A thermally insulating protective sleeve according to claim 13 , characterized in that the object to be thermally insulated is a liquid discharge port of a urea solution supply pump of a selective catalytic reduction after-treatment system, and/or a connector for connecting to the liquid discharge port.

Assignees

• Bosch Gmbh Robert

Inventors

• Zhu Xuejun
• Wang Pengbo

Classifications

• F01N2610/02

  the substance being ammonia or urea · CPC title

• F01N2610/1433

  Pumps · CPC title

• F01N13/14 Primary

  having thermal insulation {(exhaust manifolds F01N13/102)} · CPC title

• F28F13/14

  by endowing the walls of conduits with zones of different degrees of conduction of heat · CPC title

• F01N3/2066

  Selective catalytic reduction [SCR] · CPC title