Title:
PIPELINE COMPENSATOR USING COMBINED SEALING STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2021/047671
Kind Code:
A1
Abstract:
A pipeline compensator using a combined sealing structure, comprising an outer sleeve (3), a rotary core pipe (6), and a packing gland (5). A sealing cavity is provided with a sealing packing. The sealing packing comprises pressure variable metal rings (1) and non-metallic flexible packings (4). The pressure variable metal ring (1) is radially expanded and deformed under the action of the external force, so that inner and outer sides of the pressure variable metal ring (1) closely match a side wall of the sealing cavity. The pressure variable metal ring (1) is tightly combined with the non-metallic flexible packing (4). The pressure variable metal ring (1) is formed by bending a metallic hollow pipe, or is formed by bending a metal piece having a semi-circular, arc-shaped, or V-shaped cross-section. A linear metal sealing ring (2) is embedded between the step side surface of a step-shaped outer flange (61) of the rotary core pipe (6), and an opposite surface of an inner convex ring (31) of the outer sleeve (3).
Inventors:
PAN WENHAO (CN)
Application Number:
PCT/CN2020/115049
Publication Date:
March 18, 2021
Filing Date:
September 14, 2020
Export Citation:
Assignee:
JIANGSU YONGLI PIPELINE CO LTD (CN)
International Classes:
F16L27/08; F16J15/18; F16J15/20; F16J15/28; F16L51/00
Foreign References:
| CN110671557A | 2020-01-10 | |||
| CN107270001A | 2017-10-20 | |||
| CN209278709U | 2019-08-20 | |||
| CN109707945A | 2019-05-03 | |||
| CN206600545U | 2017-10-31 | |||
| CN105221887A | 2016-01-06 | |||
| US3936079A | 1976-02-03 |
Attorney, Agent or Firm:
KEYCOM PARTNERS, P.C. (CN)
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