CN212338539U

CN212338539U - Thermal insulation corrugated expansion joint

Info

Publication number: CN212338539U
Application number: CN202020266098.6U
Authority: CN
Inventors: 顾劲华; 黄春林; 朱彪
Original assignee: Jiangsu Yoryuo New Pipes Co ltd
Current assignee: Jiangsu Yoryuo New Pipes Co ltd
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2021-01-12
Anticipated expiration: 2030-03-05

Abstract

The utility model provides a heat preservation ripple expansion joint, it includes bellows (7), the both ends sealing connection of bellows has takeover (1), paste stereoplasm insulating tile (2) of the semicircle ring of two sintering formation on the takeover, the outward appearance of stereoplasm insulating tile is equipped with staple bolt (3), the both ends of staple bolt have ear (9) of bending outward, bolt (10) pass the ear with stereoplasm insulating tile tighten on the takeover, the staple bolt has extension (11) that extend to bellows direction earlier on, the cover has a sleeve (8) on the extension, telescopic both ends radial extension has flange (4), telescopic surface coats and is stamped heat preservation (5), leave axial interval between sleeve and the ear. The corrugated expansion joint has the beneficial effects that the structure is simple, the corrugated expansion joint can stretch freely, the connecting pipe and the corrugated pipe are not in contact with a metal shell wrapped with a heat insulation material, a heat conduction channel is blocked, and the heat energy loss can be effectively avoided.

Description

Thermal insulation corrugated expansion joint

Technical Field

The invention relates to an expansion joint which is used for compensating expansion caused by heat and contraction caused by cold of a thermal pipeline.

Background

The thermal pipeline can change the axial size due to expansion with heat and contraction with cold, and the change of the axial size can be compensated by installing a corrugated expansion joint in the thermal pipeline; in order to prevent the heat of the heat distribution pipeline from diffusing through the corrugated expansion joint, a heat insulation material is arranged on the corrugated expansion joint. The heat insulation structure of the existing corrugated expansion joint is complex, a metal shell wrapping heat insulation materials is in contact with the corrugated expansion joint, the metal shell can still transfer heat, and improvement is needed.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a heat-preservation corrugated expansion joint which is simple in structure and can effectively reduce heat loss.

The invention has the technical scheme that the heat-insulation corrugated expansion joint comprises a corrugated pipe 7, wherein two ends of the corrugated pipe are hermetically connected with a connecting pipe 1, two semi-circular hard heat-insulation tiles 2 formed by sintering are adhered on the connecting pipe, the outer surface of each hard heat-insulation tile is provided with a hoop 3, two ends of each hoop are provided with outward-bent lugs 9, a bolt 10 penetrates through the lugs to tighten the hard heat-insulation tiles on the connecting pipe, each hoop is provided with an extension part 11 extending towards the corrugated pipe, a sleeve 8 is sleeved on each extension part, flanges 4 are extended from two ends of each sleeve in the radial direction, the outer surface of each sleeve is covered with a heat-insulation layer 5, and an axial distance is reserved between each sleeve and each lug.

The corrugated expansion joint has the beneficial effects that the structure is simple, the corrugated expansion joint can stretch freely, the connecting pipe and the corrugated pipe are not in contact with a metal shell wrapped with a heat insulation material, a heat conduction channel is blocked, and the heat energy loss can be effectively avoided.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a right side view of fig. 1.

The figures are numbered: 1-connecting pipe, 2-hard heat preservation tile, 3-hoop, 4-flange, 5-heat preservation layer, 6-temperature-resistant cloth, 7-corrugated pipe, 8-sleeve, 9-ear, 10-bolt and 11-extension part.

Detailed Description

The utility model provides a heat preservation ripple expansion joint, it includes bellows 7, the both ends sealing connection of bellows has takeover 1, the stereoplasm insulating tile 2 of the semicircle ring that two sintering formed is pasted on the takeover, the outward appearance of stereoplasm insulating tile is equipped with staple bolt 3, the both ends of staple bolt have the ear 9 of bending outward, bolt 10 passes the ear and tightens the stereoplasm insulating tile on the takeover, the staple bolt has extension 11 that extends to the bellows direction earlier on, the cover has a sleeve 8 on the extension, telescopic both ends radial extension has flange 4, cover heat preservation 5 on the telescopic surface, leave axial interval between sleeve and the ear.

During the use, the takeover is connected in thermal power pipeline, and when thermal power pipeline expend with heat, the bellows shrink, and during thermal power pipeline shrink, the bellows stretches, and the sleeve overlaps on the extension of staple bolt, and the sleeve can slide on the staple bolt, does not influence the flexible of bellows, and the ear can play limiting displacement to the sleeve, prevents that the sleeve from breaking away from the extension.

The hard heat-preservation tile and the heat-preservation layer 5 form a heat-insulation system, the hard heat-preservation tile is located between the hoop and the connecting pipe, the hoop, the connecting pipe and the corrugated pipe are not in contact, the sleeve is sleeved on the extending portion of the hoop and is not in contact with the corrugated pipe, and the connecting pipe, the corrugated pipe and the outside do not have heat conduction channels.

The heat preservation layer can be two semi-circular heat preservation barrels that sinter, and the semi-circular heat preservation barrels are tightened by the hoop (the hoop structure is basically the same as the hoop structure, the difference is that there is not extension portion, not drawn in the attached drawing), the heat preservation layer is made of flexible asbestos material, and the flexible asbestos material is wrapped with the high temperature cloth 6, and the flexible asbestos material is prevented from dropping.

Claims

1. The utility model provides a heat preservation ripple expansion joint, it includes bellows (7), the both ends sealing connection of bellows has takeover (1), characterized by, paste stereoplasm insulating tile (2) of the semicircle ring that two sintering formed on the takeover, the outward appearance of stereoplasm insulating tile is equipped with staple bolt (3), the both ends of staple bolt have ear (9) of bending outward, bolt (10) pass the ear with stereoplasm insulating tile tighten on the takeover, the staple bolt has extension (11) that extend to bellows direction earlier on, the cover has a sleeve (8) on the extension, telescopic both ends radial extension has flange (4), telescopic surface coats and is stamped heat preservation (5), leave axial interval between sleeve and the ear.

2. The thermal corrugated expansion joint of claim 1, wherein said thermal insulation layer is formed by two semi-circular thermal insulation cylinders which are sintered together and tightened by a hoop.

3. The thermal corrugated expansion joint as claimed in claim 1, wherein the thermal insulation layer is made of flexible asbestos material, and the flexible asbestos material is wrapped with high temperature cloth (6).