CN202349458U

CN202349458U - Large-deflection compensation joint

Info

Publication number: CN202349458U
Application number: CN2011204845827U
Authority: CN
Inventors: 魏新林; 彭劲松; 吴晓; 杨志鹏
Original assignee: BEIJING ZHONGHAIWEI ENVIRONMENT ENGINEERING Co Ltd XINGYANG MANUFACTURING BRANCH
Current assignee: Zhengzhou Zhonghai Environmental Protection Technology Co., Ltd.
Priority date: 2011-11-29
Filing date: 2011-11-29
Publication date: 2012-07-25
Anticipated expiration: 2021-11-29

Abstract

The utility model discloses a large-deflection compensation joint, comprising a tubular body and two short pipes which are inserted into the body at intervals; check rings which are sheathed on the short pipes are respectively supported between the body and the two short pipes; sealing rings which are sheathed on the short pipes are respectively arranged on the end faces of the outer ends of the check rings; glands which are in force fit with corresponding sealing rings are respectively sheathed on the short pipes; the glands are fixedly connected with a connection flange which is fixed in the middle of the outer wall of the body through bolts respectively; the check ring and the body are integrated; the end faces of the outer ends of the sealing rings are conical surfaces, the throats of which are back to the body; and the inner walls of the glands have conical surfaces which are in force fit with the end faces of the outer ends of corresponding sealing rings. When pressing force is applied to the glands through the bolts, continuous pre-tightening force is respectively applied to the short pipes and the check rings by the sealing rings, so that the sealing effect of the compensation joint is improved; and the connection flange of the body is used for fixing the middle position of the body, so that the mounting of the bolts is not influenced when the body is longer and the structure is simple.

Description

The large deflection compensating joint

Technical field

The utility model relates to a kind of compensation of pipeline device, is specifically related to a kind of large deflection compensating joint.

Background technique

Present pipe-line system such as gas pipe line, water supply line, oil transport pipeline etc. are in process of deployment; Often to consider serious owing to surface subsidence, vibrations are big, with a varied topography and seasonal variations, the day and night temperature difference influence that causes the pipeline deflection and expand with heat and contract with cold pipeline is produced greatly, to remedy the axial displacement and the amount of deflection of pipeline eccentric so compensation device must be set on the pipeline.

Chinese patent CN101694257A discloses a kind of large deflection loose tube compensation joint; The body that comprises tubular structure, body internal clearance are inserted with the short tube that two outer ends have mounting flange, support being provided with back-up ring between body and two short tubes respectively; Be top-loaded with the seal ring that is sheathed on the short tube respectively on the outer end end face of back-up ring; Be arranged with the gland with each self-corresponding seal ring compression fit on the said short tube respectively, offer on the inwall of gland and annular breach that seal ring coincide and cooperates, the short tube outer wall is produced lasting pretightening force in order to guarantee seal ring; On the inner end face of seal ring, offer annular groove; Be pressed with Stamping Steel Ribbon in the annular groove, on the outer wall of two short tubes, be fixed with limiting stopper near inner end positions separately, limiting stopper is used to prevent that short tube from pulling.The compensating joint of this structure need guarantee the pretightening force of seal ring to short tube by the active force of Stamping Steel Ribbon, and to reach better sealing effect, still need in seal ring, offer annular groove is used to install Stamping Steel Ribbon, troublesome poeration, and also structure is also complicated; In addition, back-up ring and body end face top dress in order to guarantee the sealing between body and the back-up ring, also will be provided with Stamping Steel Ribbon between the adpting flange of body and the gland, cause bolt can not regulate the impacting force that gland does not apply seal ring.

The model utility content

The purpose of the utility model provides a kind of good sealing effect and large deflection compensating joint simple in structure.

The utility model adopts following technological scheme: a kind of large deflection compensating joint; The body and the gap that comprise tubular structure are inserted in intrinsic two short tubes; The place, two ends that is positioned at body between said body and two short tubes supports respectively and is provided with the back-up ring that is sheathed on the short tube; Be top-loaded with the seal ring that is sheathed on the short tube respectively on the outer end end face of back-up ring; Be arranged with the gland with each self-corresponding seal ring compression fit on the said short tube respectively, said gland is connected through bolt and the adpting flange that is fixed on the neutral position of body outer wall respectively, and said back-up ring and body are wholely set; The outer end end face of said seal ring is the reducing conical surface of body dorsad, and the inwall of gland has the conical surface that coincide and be press-fitted with the outer end end face of corresponding seal ring separately.

The outer end end face of said back-up ring is the conical surface of reducing towards body, the conical surface of the inner end face of said seal ring for coincideing and be press-fitted with the outer end end face of corresponding back-up ring separately.

Adopt the large deflection compensating joint of said structure, back-up ring and body are wholely set, and therefore need not consider the sealing between body and the back-up ring; Because the outer end end face of seal ring is the reducing conical surface of body dorsad; The inwall of gland has and the identical conical surface that is press-fitted of the outer end end face of seal ring, and when through bolt gland being applied impacting force, seal ring has applied the pretightening force that continues respectively to short tube and back-up ring; Improved the sealing effect of compensating joint; And the adpting flange of body is one of the fixed body neutral position, do not influence the installation of body length bolt when big, and structure is also simple.

Description of drawings

Fig. 1 is the example structure schematic representation of the utility model.

Embodiment

The embodiment of the large deflection compensating joint of the utility model: as shown in Figure 1; The body 7 that comprises tubular structure; Be welded with adpting flange 6 on the neutral position of body 7 outer walls; Being inserted with two outer ends at body 7 internal clearances has on the tube wall of 2, two short tubes 2 of short tube of mounting flange 1 near inner end positions place separately and is fixed with limiting stopper 8.Support respectively between said body 7 and two short tubes 2 and be provided with the back-up ring 9 that is sheathed on the corresponding separately short tube 2; Two back-up rings 9 lay respectively at the place, two ends of body 7 and all are wholely set with body 7; Back-up ring 9 also can be fixing with body 7 welding; The outer end end face of back-up ring 9 is the conical surface of reducing towards body 7; In order to guarantee the sealing between short tube 2 and the back-up ring 9; Be top-loaded with the seal ring 4 that is sheathed on respectively on the corresponding separately short tube 2 on the outer end end face of back-up ring 9, the cross section of said seal ring 4 is interior big outer little trapezium structure, and what the inner end face of seal ring 4 was reducing towards body 7 is the reducing conical surface of body 7 dorsad with the conical surface, the outer end end face that is press-fitted that coincide of the conical surface of corresponding back-up ring 9 separately.Also be arranged with gland 3 on the short tube 2 respectively with seal ring 4 compression fit; Offer the conical surface that coincide and be press-fitted with the conical surface of corresponding seal ring 4 separately on the inwall of gland 3 respectively; Gland 3 is fixedly connected with adpting flange 6 through double threaded screw 5 respectively; Through regulating the nut that install at double threaded screw 5 two ends, the impacting force that can regulate 3 pairs of seal rings 4 of gland.

In other embodiments, two glands also can be connected through bolt.

When the foregoing description was specifically used, string was contained on the pipeline of pipe-line system, and was connected with pipeline through mounting flange 1, the axial displacement that short tube 2 moving axially in body 7 can extraction duct, and the angular displacement of short tube 2 can absorb the amount of deflection off-centre of several angle.Regulate 3 pairs on the glands impacting force of corresponding seal ring separately through double threaded screw 5; Rely on the cone match of cone match, seal ring 4 and the back-up ring 9 of seal ring 4 and gland 3 simultaneously; Make 4 pairs of short tubes of seal ring 2 and back-up ring 9 apply lasting pretightening force, thereby guarantee the sealing between body 7 and the short tube 2.

Claims

1. large deflection compensating joint; The body and the gap that comprise tubular structure are inserted in intrinsic two short tubes; The place, two ends that is positioned at body between said body and two short tubes supports respectively and is provided with the back-up ring that is sheathed on the short tube; Be top-loaded with the seal ring that is sheathed on the short tube respectively on the outer end end face of back-up ring; Be arranged with the gland with each self-corresponding seal ring compression fit on the said short tube respectively, it is characterized in that: said gland is connected through bolt and the adpting flange that is fixed on the neutral position of body outer wall respectively, and said back-up ring and body are wholely set; The outer end end face of said seal ring is the reducing conical surface of body dorsad, and the inwall of gland has the conical surface that coincide and be press-fitted with the outer end end face of corresponding seal ring separately.

2. large deflection compensating joint according to claim 1 is characterized in that: the outer end end face of said back-up ring is the conical surface of reducing towards body, the conical surface of the inner end face of said seal ring for coincideing and be press-fitted with the outer end end face of corresponding back-up ring separately.