CN2176480Y

CN2176480Y - Expansion joint with direction fixing support and position limiting and flow guide sleeve

Info

Publication number: CN2176480Y
Application number: CN 93229864
Authority: CN
Inventors: 卢秉刚
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-12-07
Filing date: 1993-12-07
Publication date: 1994-09-07
Anticipated expiration: 2003-12-07

Abstract

The utility model relates to an expansion joint with a direction fixing support and a position limiting flow guide sleeve, which comprises a short connecting pipe, a long connecting pipe, a corrugated pipe, an outer shell, an outer shell support plate and a flow guide sleeve, wherein, one end of the flow guide sleeve is fixedly connected with the short connecting pipe; interstice exists between the other end of the flow guide sleeve and the radial direction of the long connecting pipe; the outer diameter of the end of the flow guide sleeve and the inner diameter of the end part of the long connecting pipe are respectively fixedly connected with an outer ring and an inner ring which are limited. The utility model has the advantages that the flow guide sleeve has the supporting and direction fixing functions and the axial limiting function; a limiting draw rod of original structure is cancelled; the structure is simple; the laying of the insulating layer is convenient; the installing requirements of 4D and 14D are cancelled; the number of supporting bases is reduced, and the cost is decreased. When the expansion joint is arranged, even if the pipelines of both sides doesn't have preferable centering, the utility model can still normally work.

Description

Expansion joint with direction fixing support and position limiting and flow guide sleeve

The utility model belongs to a kind of heat distribution pipeline compensation device, particularly a kind of expansion joint that supports directed and spacing water conservancy diversion cover that has.

The axialmode corrugated expansion joint that is used for all types of industries pipe thermal compensation at present, because fluid is when the bellows of expansion joint, local resistance is bigger, and in the easy deposit dirt in bellows place, therefore at the bellows place of expansion joint the water conservancy diversion cover is set, to reduce the pressure loss and the dirt deposition of bringing owing to eddy current.Water conservancy diversion cover in the existing expansion joint only has guide functions, does not support orientating function, need observe the requirement of 4D and 14D when expansion joint is installed; Because expansion joint elongates or shortens in the axial direction, in order to prevent during bellows in working order by draw ring, so structurally be provided with pull bar, and elongate or shorten disalignment in considering to avoid in working order, thereby between outer cover and bellows, support plate is housed, it is coated that structure more complicated, external shape are not easy to thermal insulation layer.

The purpose of this utility model provides a kind of improved bellows expansion joint, water conservancy diversion cover in it has the orientation of support and position-limiting action, simple in structure, the cancellation limit pull rod is convenient to insulation, cancel the 4D of first guiding trestle and the 14D installation requirement of second guiding trestle, reduce bearing quantity, reduction expense, and loose installation requirement, expansion joint both sides pipeline does not have better centering when promptly installing, still can proper functioning.

The purpose of this utility model is achieved in that it comprises nipple, long pipe, bellows, outer cover, outer cover support plate and water conservancy diversion cover, improved technological scheme main points are: water conservancy diversion overlap an end and nipple affixed, the other end and long pipe are gapped between radially, and this end external diameter of water conservancy diversion cover and long pipe inner end diameter be affixed spacing outer ring and inner ring respectively.

The utility model has the advantages that: outer ring and inner ring on water conservancy diversion cover and the long pipe, both had the support directing effect, have the axial limiting effect again, cancelled the limit pull rod of original structure, simple in structure, be convenient to laying of thermal insulation layer again; Cancelled the installation requirement of 4D and 14D, reduced bearing quantity, the reduction expense when expansion joint is installed, does not have better centering as the both sides pipeline, still can proper functioning.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is a structural representation of the present utility model.

See Fig. 1, concrete structure is as follows: be set with outer cover support plate 3 on long pipe 10 and the nipple 1, welding outer cover 7 on the outer cover support plate 3.1 welded bellows 5 of long pipe 10 and nipple has retaining ring 4 at weld.Water conservancy diversion overlaps 6 one ends and inner support tube 2 and nipple 1 welding, and the other end and long pipe 10 have radial clearance, this end external diameter welding outer ring 9 of water conservancy diversion cover 6, the inner end diameter welding inner ring 8 of long pipe 10.

Claims

1, a kind of expansion joint that supports directed and spacing water conservancy diversion cover that has, comprise nipple, long pipe, bellows, outer cover, outer cover support plate and water conservancy diversion cover, it is characterized in that: water conservancy diversion overlap an end and nipple affixed, the other end and long pipe are gapped between radially, and this end external diameter of water conservancy diversion cover and long pipe inner end diameter be affixed spacing outer ring and inner ring respectively.