Abrégé

A combined multi-end-face sealing rotary compensator, comprising a rotary seat (3), a rotary core pipe (1), and a packing gland (2). Sealing packing is provided in a sealing cavity; an inner convex ring (32) is provided on the inner wall of the rotary seat (3), a step-shaped outer boss (11) is provided at the right end of the rotary core pipe (1), and an assembling gap between the outer boss (11) and the inner convex ring (32) is located in the middle of the bottom of the sealing cavity. The outer boss (11) of the rotary core tube (1) is provided with at least two steps, and an end face sealing ring (6) is embedded between the side face of each step and the inner convex ring (32). A multi-stage end face sealing ring is provided between the outer boss of the rotary core pipe and the inner convex ring of an outer sleeve, and the sealing ring has a positive correlation self-sealing effect along with the change of pressure of a medium in a pipeline, so that the sealing effect is enhanced. The compensator has strong high-temperature resistance and high-pressure resistance, a good sealing effect, a long service life, and convenience in mounting.

Classes IPC  ?

• F16L 51/00 - Compensation de la dilatation dans les canalisations
• F16L 27/08 - Raccords réglablesRaccords permettant un déplacement des parties raccordées permettant un réglage ou déplacement uniquement autour de l'axe de l'un des tuyaux

Abrégé

Provided is a metal-pressure-ring and sealing-packing composite device, comprising a metal ring (4) and a non-metal sealing packing (5), wherein the metal ring (4) comprises a closed metal ring or a C-shaped metal ring with an opening at one side; the metal ring (4) is formed by bending a metal hollow pipe, or a metal sheet with a semicircular, arc-shaped or V-shaped cross section; and the metal ring (4) is pressed by an external force such that the metal ring (4) is flattened, and expands and deforms in a radial direction, so as to enable edges of an inner side and an outer side of the metal ring (4) to be in a tight fit with side walls of a sealing cavity where the metal ring is located. Further provided is a manufacturing method for the metal-pressure-ring and sealing-packing composite device. The manufacturing method comprises: processing a plurality of metal rings; placing a first metal ring at the bottom of a sealing cavity; flattening, expanding and deforming the first metal ring through a special die; and placing a first non-metal sealing packing on the first metal ring, then placing a second metal ring thereon, and flattening, expanding and deforming the second metal ring. The device and the manufacturing method therefor have the advantages of strong high-temperature and high-pressure resistance, good sealing performance, high bearing strength and long service life, are especially suitable for high-temperature and high-pressure heat pipe networks, and are safe and reliable to use.

Classes IPC  ?

• F16L 27/12 - Raccords réglablesRaccords permettant un déplacement des parties raccordées permettant réglage ou déplacement sensiblement longitudinal

Abrégé

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).

Classes IPC  ?

• F16L 27/08 - Raccords réglablesRaccords permettant un déplacement des parties raccordées permettant un réglage ou déplacement uniquement autour de l'axe de l'un des tuyaux
• F16L 51/00 - Compensation de la dilatation dans les canalisations
• F16J 15/18 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par presse-étoupes pour garnitures élastiques ou plastiques
• F16J 15/20 - Matériaux pour ces garnitures
• F16J 15/28 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par presse-étoupes pour bagues d'étanchéité rigides les bagues d'étanchéité étant en métal