CN2893366Y

CN2893366Y - Sealed insulating joint

Info

Publication number: CN2893366Y
Application number: CN 200620113063
Authority: CN
Inventors: 钟约先; 李夏喜; 刘建辉; 段蔚
Original assignee: BEIJING YONGYISHUKE CORROSION-RESISTANT TECHNOLOGY Co Ltd
Current assignee: BEIJING YONGYISHUKE CORROSION-RESISTANT TECHNOLOGY Co Ltd
Priority date: 2006-04-25
Filing date: 2006-04-25
Publication date: 2007-04-25
Anticipated expiration: 2016-04-25

Abstract

The utility model relates to a sealing insulation joint, which comprises a small flange and a big flange which are relatively and coaxially provided, and a hook cover which is connected with the big flange and coated on the circle outer wall of the two flanges. The hook cover comprises a hook part and a cover part. A dielectric filling is arranged between the circle outer wall of the small flange and the circle inner wall of the hook part. A big insulating seal shim and a small insulating seal shim are respectively positioned on the end wall of the small flange directing to the big flange and between the inner end wall of the convex rim of the small flange and the inner end wall of the cover part of the hook cover. A cavity is arranged between the circle outer wall of the convex rim of the small flange and the circle inner wall of the cover part. The big insulating seal shim consists of an inner insulating shim, a seal ring and an outer insulating shim from inside to outside in turn. By the seal ring which is arranged between the outer and inner insulating shims, the utility model effectively prevents the leakage of the steel tube from the sealed insulation joints, and greatly increases liability of the seal insulating joints.

Description

Sealed insulated joint

Technical field

The utility model relates to a kind of pipe coupling, particularly relates to a kind of sealed insulated joint that is used for steel pipe.

Background technique

Development along with the urban modernization construction, it is more and more to be layed in underground steel pipe, because these pipelines are subjected to the corrosion of outside soil and interior media for a long time, therefore leakage accident takes place often, especially the electrochemical corrosion that pipeline is caused of the stray electrical current in the soil, shorten the working life of pipeline greatly, had a strong impact on the safe operation of pipeline.In order to avoid steel pipe generation security incident effectively, prolong its working life, effective method is that pipeline is taked cathode protection measure, and the seal of pipeline is one of topmost equipment in the cathodic protection system.The patent No. is that 02205391.3 Chinese utility model patent discloses a kind of integrated type insulating joint, as shown in Figure 1, it comprises flange I 21, flange II 22 and colludes cover 25, this colludes cover 25 has center hole for the bottom cup-shaped cover, the cup bottom sleeve of this cup-shaped cover is contained on the flange I 21, be provided with insulation filler 26 between the two, be provided with insulated enclosure pad I 27 between cup end inner face and the flange I 21, be provided with insulated enclosure pad II 28 and " O " type rubber seal 29 between flange I 21 and the flange II 22.Adopt reasons such as the pressurized gas that may flow in properties of materials etc. and the pipeline or liquid owing to insulated enclosure pad II 28, insulated enclosure pad II 28 can produce longitudinal cracks and make gas or leak of liquid in the pipeline.

The model utility content

The purpose of this utility model is to provide a kind of sealability sealed insulated joint more reliably.

Sealed insulated joint of the present utility model, comprise coaxial little flange that is oppositely arranged and big flange, and link to each other with described big flange and coat the cover that colludes of described two flange outer circumferential walls, the described cover that colludes comprises hook part and cover portion, the outer circumferential walls of described little flange flange inboard and described colluding between the circumferential inner wall that overlaps the hook part are provided with insulation filler, between the described little flange end wall relative with big flange and the inboard end wall of described little flange flange be respectively equipped with big insulated enclosure pad and little insulated enclosure pad with described colluding between the inboard end wall that overlaps the hook part, be provided with a cavity between the outer circumferential walls of described little flange flange and the described circumferential inner wall that colludes condom portion, described big insulated enclosure pad is by interior insulation spacer, seal ring and external insulation pad are formed from inside to outside successively.

The outer circumferential walls of the described little flange flange in the sealed insulated joint of the present utility model, wherein said cavity is provided with discharge tip.

Sealed insulated joint of the present utility model, be respectively equipped with a seal ring annular groove on the relevant position between insulation spacer and the external insulation pad on the wherein said little flange end wall relative with big flange in described, the two ends of described seal ring embed respectively in the described seal ring annular groove.

Sealed insulated joint of the present utility model, the two ends of wherein said seal ring are respectively equipped with the edge, described in the outer end of insulation spacer be inlaid in the annular groove that circumferential inner wall and both sides of the edge thereof by described seal ring form.

Sealed insulated joint of the present utility model is respectively equipped with first waterline and second waterline in the seal ring annular groove on wherein said little flange and the big flange end wall, and the outer wall of described seal ring both sides of the edge pressurized respectively embeds in described first waterline and second waterline.

Sealed insulated joint of the present utility model, wherein said little insulated enclosure pad, interior insulation spacer and external insulation pad are made by epoxy phenolic fabric swatch or epoxy laminate.

Sealed insulated joint of the present utility model, wherein said little flange links to each other with second pipe with first pipe respectively with the outside of big flange.

Sealed insulated joint of the present utility model, by between interior insulation spacer and external insulation pad, installing seal ring, intercepted effectively steel pipe from sealed insulated joint to external leakage, thereby increased the sealing reliability of sealed insulated joint greatly.

Description of drawings

Fig. 1 is the plan view of sealed insulated joint in the prior art;

Fig. 2 is the utility model sealed insulated joint one embodiment's a plan view.

Embodiment

With reference to figure 2, the embodiment of the utility model sealed insulated joint comprises coaxial little flange that is oppositely arranged 2 and big flange 12, and links to each other with big flange 12 and coat the cover that colludes of described two flange outer circumferential walls.Little flange 2 links to each other with second pipe 13 with first pipe 1 respectively with the outside of big flange 12.This colludes cover and comprises hook part 4 and cover portion 8, the outer circumferential walls of little flange 2 flange inner and collude between the circumferential inner wall of cover hook part 4 and be provided with insulation filler 3 is between the relative end wall of little flange 2 and big flange 12 and little flange 2 flange inner end walls and collude between the inboard end wall that overlaps hook part 4 and be respectively equipped with big insulated enclosure pad and little insulated enclosure pad 5.The outer circumferential walls of little flange 2 flanges and collude between the circumferential inner wall of condom portion 8 and be provided with a cavity 6, the outer circumferential walls of little flange 2 flanges is provided with two discharge tip 7 in the cavity 6.

Big insulated enclosure pad is made of from inside to outside successively interior insulation spacer 14, seal ring 10 and external insulation pad 9.On the relevant position between interior insulation spacer 14 and the external insulation pad 9, be respectively equipped with a seal ring annular groove on the relative end wall of little flange 2 and big flange 12, the two ends of seal ring 10 are respectively equipped with the edge, the sectional shape of seal ring 10 is " worker " font, the edge at described seal ring 10 two ends embeds respectively in the seal ring annular groove on little flange 2 and big flange 12 end walls, and the outer end of interior insulation spacer 14 then is inlaid in the annular groove that is formed by the circumferential inner wall of seal ring 10 and both sides of the edge thereof.Be respectively equipped with first waterline 15 and second waterline 11 in the seal ring annular groove on little flange 2 and big flange 12 end walls, the outer wall of seal ring 10 both sides of the edge pressurized respectively embeds in this first waterline 15 and second waterline 11, with further enhancing sealability.

Little insulated enclosure pad 5, interior insulation spacer 14 and external insulation pad 9 are made by epoxy laminate, and this material has vertically characteristics easy to crack.And adopted sealed insulated joint of the present utility model; when the gas of the high pressure that flows in the steel pipe of its protection or liquid; under the effect of pressure; interior insulation spacer 14 can produce crackle longitudinally; make gas or liquid in the pipeline produce leakage along crackle; but because the existence of seal ring 10; its with leakage interclude in interior insulation spacer 14; strengthened the sealing of sealed insulated joint, and first waterline 15 and second waterline 11 have more strengthened the sealing of seal ring 10 both sides of the edge and little flange 2 and big flange 12 end wall phase-contact surfaces.

Claims

1, a kind of sealed insulated joint, comprise coaxial little flange (2) that is oppositely arranged and big flange (12), and link to each other with described big flange (12) and coat the cover that colludes of described two flange outer circumferential walls, the described cover that colludes comprises hook part (4) and cover portion (8), the outer circumferential walls of described little flange (2) flange inner and described colluding between the circumferential inner wall that overlaps hook part (4) are provided with insulation filler (3), between described little flange (2) end wall relative with big flange (12) and described little flange (2) flange inner end wall be respectively equipped with big insulated enclosure pad and little insulated enclosure pad (5) with described colluding between the inboard end wall that overlaps hook part (4), be provided with a cavity (6) between the outer circumferential walls of described little flange (2) flange and the described circumferential inner wall that colludes condom portion (8), it is characterized in that: described big insulated enclosure pad is by interior insulation spacer (14), seal ring (10) and external insulation pad (9) are formed from inside to outside successively.

2, sealed insulated joint according to claim 1 is characterized in that: the outer circumferential walls of described little flange (2) flange in the described cavity (6) is provided with discharge tip (7).

3, sealed insulated joint according to claim 2, it is characterized in that: be positioned on described little flange (2) end wall relative with big flange (12) on the relevant position between described insulation spacer (14) and the external insulation pad (9) and be respectively equipped with a seal ring annular groove, the two ends of described seal ring (10) embed respectively in the described seal ring annular groove.

4, sealed insulated joint according to claim 3, it is characterized in that: the two ends of described seal ring (10) are respectively equipped with the edge, described in the outer end of insulation spacer (14) be inlaid in the annular groove that circumferential inner wall and both sides of the edge thereof by described seal ring (10) form.

5, sealed insulated joint according to claim 4, it is characterized in that: be respectively equipped with first waterline (15) and second waterline (11) in the seal ring annular groove on described little flange (2) and big flange (12) end wall, the outer wall of described seal ring (10) both sides of the edge pressurized respectively embeds in described first waterline (15) and second waterline (11).

6, sealed insulated joint according to claim 4 is characterized in that: described little insulated enclosure pad (5), interior insulation spacer (14) and external insulation pad (9) are made by epoxy phenolic fabric swatch or epoxy laminate.

7, according to any one described sealed insulated joint in the claim 1 to 6, it is characterized in that: described little flange (2) links to each other with second pipe (13) with first pipe (1) respectively with the outside of big flange (12).