CN201373189Y - Metal welding pipe joint - Google Patents
Metal welding pipe joint Download PDFInfo
- Publication number
- CN201373189Y CN201373189Y CN200920130034U CN200920130034U CN201373189Y CN 201373189 Y CN201373189 Y CN 201373189Y CN 200920130034 U CN200920130034 U CN 200920130034U CN 200920130034 U CN200920130034 U CN 200920130034U CN 201373189 Y CN201373189 Y CN 201373189Y
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- joint
- pipe
- welding
- socket
- bellmouth
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Abstract
The utility model discloses a metal welding pipe joint, which comprises a pipe body and a connecting pipe and is characterized in that a joint socket of the pipe body is equipped with a tapered section, the connecting pipe is inserted inside the joint socket of the pipe body to form socket lapping by butt weld forming. The socket and spigot overlap joint manner and the installing structure of the pipe joint provided by the metal welding pipe joint realize smooth welding crater with welding seam in butt welding and double-face formation, radically eliminate seam between socket barrels, simultaneously eliminate pipe end seams, and form a smooth welding pipe joint without any seam gap. The connection manner provided by the metal welding pipe joint realizes correct and fast joint connecting manner, brings convenience to operate, and leads installation to be simple and reliable. The metal welding pipe joint can be widely applied to socket and spigot joint of piping of building water supply, gas, steam, equipment, industrial fluid, food and drug fluid and the like.
Description
Technical field
It is pipe joint that the utility model relates to, and especially relates to a kind of metal welding pipe joint.
Background technique
Adopt the thin metallic tubd of argon arc welding, plasma welding, carbon dioxide arc welding to adopt joint socket lap welding method mostly in the existing pipe-line system.Thin metallic tubd inserts in the joint socket of pipe fitting as insertion tube during installation, in bellmouth end and pipe welding.Chinese patent CN2886275Y, CN2011Q3755Y disclose tipping and the welding scheme that solves thin-wall stainless steel respectively, and their common deficiency is to have produced corrosion and antihygienic problem, cause crevice corrosion, stress corrosion, heat color corrosion.There is the large size gap in its main cause between bellmouth inwall and socket outer wall cylindrical shell, and the slit of bellmouth transition position and socket end face and scrap (bridge) weld seam can produce following problem: 1) shielding gas can not enter in the slit, produce heat color, influence the corrosion resistance of pipeline; 2) crevice corrosion can be produced, system destruction can be caused; 3) easily deposit dirt in the slit, grow mushroom, influence the health of pipeline.In addition, the lap welding cooling is too fast, bath crystallization inequality, and crystal grain is thick, and welding stress is bigger.
The model utility content
A technical problem to be solved in the utility model is to remedy the defective that above-mentioned prior art exists, and proposes a kind of metal welding pipe joint.
Metal welding pipe joint technical problem of the present utility model is solved by the following technical programs.
This metal welding pipe joint comprises: pipe fitting and connecting tube.
The characteristics of this metal welding pipe joint are:
The joint bellmouth of described pipe fitting is provided with tapered section portion;
The interior socket joint that forms of joint bellmouth that described connecting tube is plugged on pipe fitting overlaps the butt welding moulding.
Metal welding pipe joint technical problem of the present utility model is solved by following further technological scheme.
The joint bellmouth effective length of socket joint overlap joint is 1.0～5.0 times of pipe fitting wall thickness d, and concrete length is under the condition that satisfies the plug-in mounting location, according to joint socket Transverse plane gap the filling magnitude of recruitment needs of material is decided.The gap is 0.03～0.50mm between the joint bellmouth inner diameter of pipe fitting and the connecting tube insertion mouthful external diameter of pipe; The concrete controlled quentity controlled variable in gap is to cause that according to pipe thickness the not roundness of pipe confirms, the gap should be the smaller the better under the plug-in mounting condition satisfying.
The transition reducing of described joint bellmouth is to the gap of leaving between the pipe end face of the internal surface of pipe fitting handing-over line and connecting tube less than 1.5d, and the welding weld bond is the butt welding structure, and meets the standard of butt joint silk filling welded tube.
Be provided with the reducing transition position between described joint bellmouth and the pipe fitting, form the circular cone of joint bellmouth and pipe fitting, its circular cone oblique angle a is 45 °～90 °, is confirmed by the gap value of control joint socket Transverse plane.According to the different bellmouth length of pipe fitting wall thickness d and the needs amount of filler of a angle preset clearance, by the length of calculation Design joint bellmouth.
The beneficial effect that the utility model is compared with the prior art is:
The joint socket overlapping mode that metal welding pipe joint of the present utility model is provided, the attaching structure of pipe joint, realize that weld seam is the level and smooth soldering opening of butt welding double-faced forming, fundamentally eliminated the existence of crack between the joint socket cylindrical shell, eliminate the tube opening slit simultaneously, formed a kind of level and smooth welded stub connection that does not have any crack gap.
The attaching mode that metal welding pipe joint of the present utility model is provided has realized attaching joint style quickly and accurately, is convenient to operation, and simple installation is reliable.Can be widely used in the socket joint attaching of pipe arrangements such as building water supply, gas, vapour, equipment, industrial fluids, food medical fluid.
The joint socket physical dimension structure of metal welding pipe joint of the present utility model, the technical requirements parameter, the welded pipe joint that plug-in mounting is welded into just can be eliminated the narrow peak-to-peak crack of causing because of the plug-in mounting weldering, fundamentally eliminate problems such as the issuable corrosion in gap is unhygienic, the possibility that eliminates stress and corrode has been got rid of the parasitic possibility of corroding ion.
Metal welding pipe joint of the present utility model wherein to the big control in gap between the joint socket interior edge face, provides the quantitative relationship of appearance of weld condition and weld seam height Richness and bellmouth length, and the quantitative basis of implementing is provided.
Description of drawings
Fig. 1 is the state profile after the metal welding pipe joint joint socket of the utility model embodiment overlaps plug-in mounting;
Fig. 2 is a joint socket butt welding access node structure sectional drawing behind Fig. 1 plug-in mounting;
Fig. 3 is the partial enlarged drawing of A among Fig. 1;
Fig. 4 is a gas shiled device location sectional drawing in Fig. 1 weld bond position;
Fig. 5 is that the joint socket tie point welds temporary fixed sectional drawing behind Fig. 1 plug-in mounting.
Embodiment
A kind of metal welding pipe joint of the hot and cold water that supplies water, adopt welded pipe joint specification DN20, pipe thickness 0.6mm, joint thickness 0.6mm, material is SUS316L or SUS304 austenite stainless steel, also be applicable to SUS444 Ferritic Stainless Steel and other metallic material, characteristics are: thin-wall metal pipe, pipe fitting interface are the socket joint overlap joints, the butt welding moulding.
Fig. 1 is the state profile after the metal welding pipe joint joint socket of the utility model embodiment overlaps plug-in mounting.Take over 4 in the joint bellmouth 1 interpolation load of pipe fitting 3 and form pipe joint.Pipe fitting 3 and connecting tube 4 are that stainless steel material forms by the OCr19Ni9 with anti-corrosive properties.The joint bellmouth 1 of pipe fitting 3 forms the minimum diameter part by moulding means such as expander shapings, less than the hole enlargement tapered section portion 2 of connecting tube 4 external diameters, connecting tube 4 is inserted joint bellmouth 1 taper ends of pipe fitting 3.Pipe fitting 3 reducings carry out the transition to joint bellmouth 1 hole enlargement tapered section portion 2, in the time of in the inner peripheral surface 1b of the bellmouth wide diameter portion 1a of enlarged-diameter, by with the spacing position, rear end of the hole enlargement tapered section portion 2 of affiliated taper fixed position 2a, insert the state of placing restrictions on and keep connecting tube 4 to limit as connecting tube 4.
Leave the gap 6 less than 1.5d between the pipe end face 5 of joint bellmouth 13 internal surface handing-over line 3a and connecting tube 4 to the transition reducing to pipe fitting, the state of placing restrictions on that inserts that limits is set, fixed position 2a and internal surface join the spacing of line 3a.Pipe end face 5 is planaperturates or to have the outer groove of pipe be 30 °～60 ° groove.
The crack is 0～0.1mm between the inner peripheral surface 1b of joint bellmouth 1 and the connecting tube of the insertion 4 peripheral surface 4a.The length of the bellmouth wide diameter portion 1a of joint bellmouth 1 is 1.0～5.0d.
Fig. 2 is a joint socket butt welding access node structure sectional drawing behind Fig. 1 pipe fitting 3 and connecting tube 4 plug-in mountings.The face of weld 7a of the main body weld seam 7 of described butt joint moulding all exceeds the peripheral surface 4a of parent outer circumferential face 3b and connecting tube 4, and pipe fitting 3 and connecting tube 4 butt welding are connected into are structure as a whole; And the weld seam internal surface 7b of joint slightly exceeds the inner peripheral surface 4b weld seam of parent inner peripheral surface 3c and connecting tube 4, and the level and smooth parent that carries out the transition to.
Fig. 3 is the partial enlarged drawing of A among Fig. 1.The welded pipe joint of this embodiment carries out the transition to pipe fitting 3 at joint bellmouth 1 hole enlargement tapered section portion 2 reducings of pipe fitting 3, forms the bellmouth pipe box of pipe fitting 3, becomes the accurate connecting body of insertion positioning limit of connecting tube 4.At joint bellmouth 1 inner peripheral surface 1b to the fixed position 2a of changeover portion reducing limited part as connecting tube 4,4 axial conical surface degree angle a are 45 °～90 ° to the internal surface of changeover portion reducing face and pipe fitting 3 handing-over line 3a and connecting tube, after plug-in mounting is finished, the crack is 0～0.1mm between the socket outer circumferential face 4a of the inner peripheral surface 1b plug-in mounting connecting tube 4 of joint bellmouth 1, and the bellmouth length of the bellmouth wide diameter portion 1a of enlarged-diameter is 1.0～5.0d.Gap 6 between the pipe end face 5 of pipe fitting 3 internal surfaces handing-over line 3a and connecting tube 4 is the easiest welding of 0.2～1.0d.
Fig. 4 is a gas shiled device location sectional drawing in Fig. 1 weld bond position.Preceding elasticity airtight plate 9 among the figure is linked to be a combination by some strut-type connecting rods 11 with back elasticity airtight plate 10, and the central position of back airtight plate 10 is fixed with connectivity trachea 12, connects source of the gas outside pipe.Elasticity airtight plate 9 before the inner peripheral surface 3c of the pipe fitting 3 of the both sides in plug-in mounting gap 6 pipe joint is provided with, the inner peripheral surface 4b that is temporarily fixed at the connecting tube 4 of pipe joint is provided with back elasticity airtight plate 10, can in pipe, slide, the inflation body cavity symmetry that forms by connecting rod 11 be located at 6 both sides, plug-in mounting gap, two plate washers distance is greater than 40mm.Forward and backward elasticity airtight plate the 9, the 10th, heat-resisting silicone rubber or rubber asbestos product.Connecting rod 11 is the metallic rod that comprise steel.Breathing pipe 12 is copper pipe, steel pipe or rubber plastic pipe.
Fig. 5 is that the joint socket tie point welds temporary fixed sectional drawing behind Fig. 1 plug-in mounting.Adopt some somes spot welding immovable point 8 fixed positions of argon arc welding symmetry, joint bellmouth 1 end face of pipe fitting 3 and the outer circumferential face 4a spot welding of connecting tube 4 are fixed into one temporarily.Open welding machine,, joint bellmouth 1 is all dissolved within the gap 6 as the weldering underfill material, form welding forming weld seam 7 good welding gun.
Its assembling and welding process has following steps successively: 1) pretreatment and pre-configured; 2) insert interior gas shiled device; 3) socket joint overlap joint pipe fitting interface puts in place; 4) temporary fixed; 5) butt welding moulding.Locate down by the state in the joint bellmouth 1 that connecting tube 4 is inserted into thin-wall stainless steel pipe fitting body 3, adopt butt joint filler welding process method pipe fitting 3 and connecting tube 4 electric welding moulding.
Step 3) socket joint overlap joint pipe fitting interface puts in place, is connecting tube 4 is inserted in the bellmouth wide diameter portion 1a of pipe fitting 3 to joint bellmouth 1 position to fixed position 2a place.Gap 6 between the internal surface handing-over line 3a of pipe fitting 3 and the pipe end face 5 of connecting tube 4 is 0.48mm, is about 0.8d.D is the pipe thickness of pipe fitting 3, and is as follows.Crack 0.2mm between the outer circumferential face 4a of the inner peripheral surface 1b of adapter body bellmouth and the socket of connecting tube 4 is 0.01mm to the bellmouth undergauge to crack between the outer circumferential face 4a of bellmouth inner peripheral surface 1b and socket by extruding.The bellmouth effective length is 2.0d=1.2mm.
Step 4) is temporary fixed, is after satisfying the plug-in mounting technical specifications, carries out symmetrical spot welding 8 between the outer circumferential face 4a with the joint bellmouth 1 end face 1a of pipe fitting 1 and connecting tube 4, by spot welding 8 with pipe fitting 3 and connecting tube 4 temporary fixed being integral.The protection argon gas is opened argon arc welding machine in feeding, and to good welding gun, joint bellmouth 1 is all dissolved in formation weld seam 7 within the gap 6 as welding filling material.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field; under the prerequisite that does not break away from the utility model design, make some alternative or obvious modification that are equal to; and performance or purposes are identical, then should be considered as belonging to the protection domain that the utility model is determined by claims of being submitted to.
Claims (4)
1. metal welding pipe joint, comprising: pipe fitting and connecting tube is characterized in that:
The joint bellmouth of described pipe fitting is provided with tapered section portion;
The interior socket joint that forms of joint bellmouth that described connecting tube is plugged on pipe fitting overlaps the butt welding moulding.
2. metal welding pipe joint according to claim 1 is characterized in that:
The joint bellmouth effective length of socket joint overlap joint is 1.0～5.0 times of pipe fitting wall thickness d;
The gap is 0.03～0.50mm between the joint bellmouth inner diameter of pipe fitting and the connecting tube insertion mouthful external diameter of pipe;
The transition reducing of joint bellmouth is to the gap of leaving between the pipe end face of the internal surface of pipe fitting handing-over line and connecting tube less than 1.5d, and the welding weld bond is the butt welding structure, and meets the standard of butt joint silk filling welded tube.
3. metal welding pipe joint according to claim 1 and 2 is characterized in that:
Be provided with the cone transitional section of reducing between described joint bellmouth and the pipe fitting.
4, metal welding pipe joint according to claim 3 is characterized in that:
The circular cone oblique angle a of described cone transitional section is 45 °～90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920130034U CN201373189Y (en) | 2009-02-17 | 2009-02-17 | Metal welding pipe joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920130034U CN201373189Y (en) | 2009-02-17 | 2009-02-17 | Metal welding pipe joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201373189Y true CN201373189Y (en) | 2009-12-30 |
Family
ID=41499271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920130034U Expired - Fee Related CN201373189Y (en) | 2009-02-17 | 2009-02-17 | Metal welding pipe joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201373189Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216688A (en) * | 2013-05-03 | 2013-07-24 | 周跃飞 | Welding method of metal pipe fitting |
| CN104295853A (en) * | 2014-09-26 | 2015-01-21 | 天津钢管集团股份有限公司 | Blocking end plug for external pressure gas sealing test of pipes |
| CN114101953A (en) * | 2021-11-15 | 2022-03-01 | 芜湖三花制冷配件有限公司 | Connecting process of multi-structural piece |
-
2009
- 2009-02-17 CN CN200920130034U patent/CN201373189Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216688A (en) * | 2013-05-03 | 2013-07-24 | 周跃飞 | Welding method of metal pipe fitting |
| CN104295853A (en) * | 2014-09-26 | 2015-01-21 | 天津钢管集团股份有限公司 | Blocking end plug for external pressure gas sealing test of pipes |
| CN104295853B (en) * | 2014-09-26 | 2016-04-06 | 天津钢管集团股份有限公司 | The shutoff end plug of tubing external pressure hermetic seal test |
| CN114101953A (en) * | 2021-11-15 | 2022-03-01 | 芜湖三花制冷配件有限公司 | Connecting process of multi-structural piece |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN YACHANG TUBES CO., LTD. Free format text: FORMER NAME: SHENZHEN ARTWAY PIPING CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 518000 Longgang City, Shenzhen province Bantian District, Liuzhou City Industrial Zone, building 17, building 4, building Patentee after: SHENZHEN ARTWAY PIPING CO., LTD. Address before: 518000, the first floor of 5 Dragon Wall Industrial City, Bantian village, Longgang District, Guangdong, Shenzhen Patentee before: Shenzhen Artway Piping Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091230 Termination date: 20180217 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |