CN203384517U - Double-containment welding joint provided with sealing medium pressing seal ring and used for steel plastic composite pipe - Google Patents
Double-containment welding joint provided with sealing medium pressing seal ring and used for steel plastic composite pipe Download PDFInfo
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- CN203384517U CN203384517U CN201320291576.9U CN201320291576U CN203384517U CN 203384517 U CN203384517 U CN 203384517U CN 201320291576 U CN201320291576 U CN 201320291576U CN 203384517 U CN203384517 U CN 203384517U
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Abstract
The utility model relates to a double-containment welding joint provided with a sealing medium pressing a seal ring and used for a steel plastic composite pipe. The welding joint comprises two joint bodies which are connected by welding, connecting end faces of the joint bodies are oppositely arranged, and are respectively provided with round holes in transition fit with the pipe in the centers, an annular sealing groove, an annular self-check groove and an annular heat insulation groove are concentrically formed in sequence on the circumferential connecting end face of the round hole of one joint body along the radial direction from the center of circle of the round hole, and a self-check hole is formed; an annular heat insulation groove and an annular self-check groove are correspondingly formed in the circumferential connecting end face of the round hole of the other joint body, a seal ring is arranged in the annular sealing groove, a heat insulation ring is arranged in the annular heat insulation groove, the joint is characterized in that a dovetail groove is formed in the contact surface of the sealing ring and the groove bottom of the annular sealing groove, a medium duct communicated with the surface of the joint body with the annular sealing groove is formed along the radial direction of the groove from the groove bottom of the annular sealing groove, in addition a pressing bolt screwed into the medium duct is arranged, and the sealing medium extruded by the pressing bolt is filled in the medium duct and the dovetail groove. The double-containment welding joint has the advantage that the sealing property is improved.
Description
Technical field
The utility model relates to a kind of pipe joint, relates in particular to a kind of steel-plastic composite pipe of the double-sealing by sealing medium pressurization sealing ring welded joint.
Background technique
Steel-plastic composite pipe is a kind of emerging composite pipe, is to be compounded to form by steel belt layer and high-density wear-resistant plastic layer, owing to having good pressure-bearing property and corrosion resistance, is widely used in oil, natural gas transport, work pipes for mining, water drinking tube, each field such as waste pipe.Yet, in engineering construction, the needs that tubing need to be arranged by on-the-spot pipeline are blocked again to be connected.For guaranteeing that sealing connects securely, traditional Placement adopts the linkage structure of mouth of pipe inner liner stainless steel, but because this Placement is that material to two kinds of unlike materials is placed on weld seam and is welded, will certainly produce very large internal stress, so this Placement is to on-the-spot welder, weather conditions and humidity of the air have the harsh technical requirements of being close to, and cause greatly having increased site operation difficulty and construction cost in when construction, and be difficult to guarantee its welding quality, sealing effect is poor, in addition, need to adopt whole pipe-line system to suppress the test sealing, the expense that wastes time and energy resource, therefore can't promote the use of always.In recent years, released in the industry a kind of steel-plastic composite pipe double seal welding joint, this welded joint comprises two joint bodies that the profile be welded to connect is identical and connecting end surface is oppositely arranged, above-mentioned two joint body connecting end surface central authorities be respectively equipped be connected it on the circular hole of pipe transition fit, wherein on the circular hole ring of joint body week connecting end surface, annular seal groove, annular self check groove and annular heat dam radially are set successively with one heart from the center of circle, and along annular self check groove radially be provided with by its bottom land and this joint body surperficial be communicated with from verify; On all connecting end surfaces of the circular hole ring of another joint body, annular heat dam and corresponding identical annular heat dam and the annular self check groove of arranging respectively of annular self check groove with aforementioned joint body, be provided with seal ring in annular seal groove, in annular heat dam, be provided with heat insulation ring.
Adopt above-mentioned double seal welding joint, formed by the double sealing structure of welded seal and seal ring sealing, significantly improved sealability, improved heat-shielding performance simultaneously, welding quality is improved, and reach utilize from verify suppress detect leak save time, laborsaving, the effect that economizes on resources, reduced construction cost.But adopt said structure still to have defect, due to the tight filling seal groove of seal ring, between two joint body connecting end surfaces, still have gap, " run, emit, drip, the leak " phenomenon that causes the pipeline of connection in use still to there will be, impact is use normally.
The model utility content
Main purpose of the present utility model is for the problems referred to above, on the existing architecture basics of double-sealing steel-plastic composite pipe with welded joint, improved, provide a kind of by the double-sealing steel-plastic composite pipe welded joint of sealing medium pressurization sealing ring, thereby reach the raising sealability, guarantee the effect of construction quality.
The utility model solves the technological scheme that its technical problem adopts:
A kind of by the double-sealing steel-plastic composite pipe welded joint of sealing medium pressurization sealing ring, comprise two joint bodies that the profile be welded to connect is identical and connecting end surface is oppositely arranged, described two joint body connecting end surface central authorities be respectively equipped be connected it on the circular hole of pipe transition fit, wherein on the circular hole ring of joint body week connecting end surface, annular seal groove, annular self check groove and annular heat dam radially are set successively with one heart from the center of circle, and along annular self check groove radially be provided with by its bottom land and this joint body surperficial be communicated with from verify, on all connecting end surfaces of the circular hole ring of another joint body, annular heat dam and corresponding identical annular heat dam and the annular self check groove of arranging respectively of annular self check groove with described joint body, be provided with seal ring in annular seal groove, be provided with heat insulation ring in annular heat dam, it is characterized in that being provided with dovetail groove on the surface of contact of described seal ring and annular seal groove bottom land, radially be provided with the medium duct be communicated with the joint body surface at annular seal groove place along groove from the annular seal groove bottom land, and setting can be screwed into the pressurization bolt in described medium duct, the sealing medium of being clamp-oned by described pressurization bolt is filled in the dovetail groove of medium duct and seal ring.
The gap that there is 0.2-1mm between described two joint body connecting end surfaces.
Described annular heat dam quantity is the 1-4 road.
Described annular seal groove quantity is the 1-2 road.
Described sealing medium is sealer, water or air.
Being shaped as of described joint body is circular or square.
The beneficial effects of the utility model are: the double-sealing steel-plastic composite pipe welded joint that passes through the sealing medium pressurization sealing ring that adopts the utility model to provide, at connecting pipe and after carrying out welding and sealing, by pressurization bolt, sealing medium is squeezed into to seal groove along the medium duct, under the pressure of pressurization bolt, sealing medium struts dovetail groove the connecting end surface that makes the tight top densification of seal ring sealing groove cell wall and relative joint body, gap between the connecting end surface of two joint bodies is blocked, reach excellent sealing effect.With existing common real core O-ring seal ratio, sealability significantly improves, and effectively prevents pipe leakage.Simultaneously, with the double seal performance of the welded seal of double seal welding joint and seal ring sealing for existing steel-plastic composite pipe, utilize the good heat-shielding performance of heat dam and utilize and suppress from verify that the detection leakage saves time, laborsaving, the effect that economizes on resources.The utility model is convenient to site operation, and construction cost is low, guarantees construction quality, is suitable for popularization.
The accompanying drawing explanation
Fig. 1 is structure of the present utility model and assembling application schematic diagram;
Fig. 2 is the connecting end surface schematic diagram of Fig. 1 middle joint body A;
Fig. 3 is the connecting end surface schematic diagram of Fig. 1 middle joint body B;
Fig. 4 is the I enlarged view in Fig. 1.
In figure: A, B joint body, 1 annular seal groove, 2 pressurization bolt, 3 medium ducts, 4 from verify, 5 annular self check grooves, 6 annular heat dams, 61 heat insulation cushion rubbers, 7 seal rings, 71 dovetail grooves, 8 pipes, 9 welding beads, 10 circular holes, 11 sealing mediums.
Below in conjunction with accompanying drawing and preferred embodiment, the utility model is described in detail.
Embodiment
Fig. 1～Fig. 4 illustrates a kind of by the double-sealing steel-plastic composite pipe welded joint of sealing medium pressurization sealing ring, comprise two joint body A that the profile be welded to connect is identical and connecting end surface is oppositely arranged, B, described two joint body A, B connecting end surface central authorities be respectively equipped be connected it on the circular hole 10 of pipe 8 transition fit, wherein on the circular hole ring of joint body B week connecting end surface, annular seal groove 1 radially is set successively with one heart from the center of circle, annular self check groove 5 and annular heat dam 6, and along annular self check groove radially be provided with its bottom land and this joint body surface are communicated with from verify 4.In actual fabrication, two the joint body A that are welded to connect, the gaps between the B connecting end surface are set to 0.2-1mm, the shape of joint body can be circular or square, annular heat dam quantity is the 1-4 road, annular seal groove quantity is the 1-2 road, the present embodiment middle joint body A, B are shaped as circle, are provided with 1 road annular heat dam and 1 road annular seal groove.On all connecting end surfaces of the circular hole ring of joint body A, annular heat dam 6 and corresponding identical annular heat dam 6 and the annular self check groove 5 of arranging respectively of annular self check groove 5 with above-mentioned joint body B, be provided with seal ring 7 in annular seal groove 1, be provided with heat insulation ring 61 in annular heat dam, of the present utility model being characterised in that on the surface of contact of above-mentioned seal ring 7 and annular seal groove bottom land is provided with dovetail groove 71, radially be provided with the medium duct 3 be communicated with the joint body surface at annular seal groove place along groove from the annular seal groove bottom land, and setting can be screwed into the pressurization bolt 2 in this medium duct 3, the sealing medium 11 be squeezed into by pressurization bolt 2 is filled in the dovetail groove 71 of medium duct 3 and seal ring.Sealing medium can adopt sealer, water or air.In this example, seal ring 7 has adopted silica gel sealing ring, and heat insulation ring 61 has adopted the rock wool heat insulation ring and the two annular heat dams 6 that are filled in by joint body A, B close up in the annular heat-insulation chamber formed.
As shown in Figure 1, the utility model, when application, at first is prefabricated in the factory, and joint body A, the B of steel is socketed in respectively to pipe 8 ports the welding be attached thereto by circular hole 10, pipe is drawn from joint body A, the B outside respectively, then carry out coated lining and mould technique and make finished product; Product is transported to job site, during laying, that joint body A, B connecting end surface is relative, adopts the counterpart machine that it is aligned, and compresses, and general gap is 0.2-1mm, is directly encircled the week welding and get final product, the welding bead 9 shown in formation Fig. 1.Then by pressurization bolt 2, sealing medium 11 is squeezed into to seal groove 1 along medium duct 3; Sealing medium can adopt sealer, water or air, now, sealing medium is filled in the dovetail groove 71 of medium duct 3 and seal ring, under the pressure in pressurization bolt 2, sealing medium struts dovetail groove the connecting end surface that makes the tight top densification sealing groove cell wall of seal ring 7 and joint body A, gap between the connecting end surface of joint body A, B is blocked, reach excellent sealing effect.Finally, utilize and suppress to by two annular self check grooves 5, closing up water filling in the annular housing formed from verify 4, the working pressure table detects, and whether can detect pipe joint, two ends has leakage.
The above, be only preferred embodiment of the present utility model, not structure of the present utility model done to any pro forma restriction.Any simple modification, equivalent variations and modification that every foundation technical spirit of the present utility model is done above embodiment, all still belong in the scope of the technical solution of the utility model.
Claims (6)
1. one kind is passed through the double-sealing steel-plastic composite pipe welded joint of sealing medium pressurization sealing ring, comprise two joint bodies that the profile be welded to connect is identical and connecting end surface is oppositely arranged, described two joint body connecting end surface central authorities be respectively equipped be connected it on the circular hole of pipe transition fit, wherein on the circular hole ring of joint body week connecting end surface, annular seal groove, annular self check groove and annular heat dam radially are set successively with one heart from the center of circle, and along annular self check groove radially be provided with by its bottom land and this joint body surperficial be communicated with from verify, on all connecting end surfaces of the circular hole ring of another joint body, annular heat dam and corresponding identical annular heat dam and the annular self check groove of arranging respectively of annular self check groove with described joint body, be provided with seal ring in annular seal groove, be provided with heat insulation ring in annular heat dam, it is characterized in that being provided with dovetail groove on the surface of contact of described seal ring and annular seal groove bottom land, radially be provided with the medium duct be communicated with the joint body surface at annular seal groove place along groove from the annular seal groove bottom land, and setting can be screwed into the pressurization bolt in described medium duct, the sealing medium of being clamp-oned by described pressurization bolt is filled in the dovetail groove of medium duct and seal ring.
2. according to claim 1 by the double-sealing steel-plastic composite pipe welded joint of sealing medium pressurization sealing ring, it is characterized in that having between described two joint body connecting end surfaces the gap of 0.2-1mm.
3. according to claim 1 and 2 by the double-sealing steel-plastic composite pipe welded joint of sealing medium pressurization sealing ring, it is characterized in that described annular heat dam quantity is the 1-4 road.
4. according to claim 3 by the double-sealing steel-plastic composite pipe welded joint of sealing medium pressurization sealing ring, it is characterized in that described annular seal groove quantity is the 1-2 road.
5. according to claim 1 and 2 by the double-sealing steel-plastic composite pipe welded joint of sealing medium pressurization sealing ring, it is characterized in that described sealing medium is sealer, water or air.
6. according to claim 1 and 2 by the double-sealing steel-plastic composite pipe welded joint of sealing medium pressurization sealing ring, it is characterized in that being shaped as of described joint body is circular or square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320291576.9U CN203384517U (en) | 2013-05-24 | 2013-05-24 | Double-containment welding joint provided with sealing medium pressing seal ring and used for steel plastic composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320291576.9U CN203384517U (en) | 2013-05-24 | 2013-05-24 | Double-containment welding joint provided with sealing medium pressing seal ring and used for steel plastic composite pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203384517U true CN203384517U (en) | 2014-01-08 |
Family
ID=49873005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320291576.9U Expired - Fee Related CN203384517U (en) | 2013-05-24 | 2013-05-24 | Double-containment welding joint provided with sealing medium pressing seal ring and used for steel plastic composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203384517U (en) |
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2013
- 2013-05-24 CN CN201320291576.9U patent/CN203384517U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160113 Address after: The 300000 Tianjin Economic Development Zone Jinghai City Department of Hokkaido Patentee after: Tianjin Zhongke Yongda Composited Tube Industry Co., Ltd. Address before: 301600, Jinghai County, Tianjin Lan Lan District 9-2-301 Patentee before: Liu Yanyun |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20190524 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |