CN1227470C - Small flange connection fittings for high pressure stainless steel tube - Google Patents
Small flange connection fittings for high pressure stainless steel tube Download PDFInfo
- Publication number
- CN1227470C CN1227470C CN 03117217 CN03117217A CN1227470C CN 1227470 C CN1227470 C CN 1227470C CN 03117217 CN03117217 CN 03117217 CN 03117217 A CN03117217 A CN 03117217A CN 1227470 C CN1227470 C CN 1227470C
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- Prior art keywords
- flange
- sealed
- stainless steel
- steel tube
- tubes
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Abstract
The present invention relates to a connection of thin-wall stainless steel tubes. Two steel tubes which are connected with each other are respectively arranged in two flange inner holes. The present invention has one kind that two ends are welded with a flange, and an open slot on one end surface of the flange is as a slot of an embedded sealed ring. The present invention has the other kind that the ends of the two steel tubes are turned with vertical edges, full-stainless inner expanding sealed sleeves are arranged among the ends, and the full-stainless inner expanding sealed sleeves are composed of left and right tapered sealed tubes and sealed seats with double sealed rings in the middle part. Because the flange is welded on a port in a sleeve welding mode before installing, so the former basically ensures the strength and the circular degree of the port. The latter is provided with the inner expanding sealed sleeve, the strength and the circular degree of the ports of the thin-wall steel tubes can be guaranteed when the thin-wall steel tubes are impacted by external force because the sealed sleeve enhances the strength of the ports of the tubes, and thereby, the sealed effect is guaranteed, and the sealed effect is guaranteed above 10MPA through a water pressure test. When high-grade silicone rubber is selected as sealed material, the sealed service life of the former tubes can reach more than 50 years, and the latter can reach more than 30 years. The weight of the small flange is one fourth to two third of that of the traditional flange, so the cost is reduced. The thin-wall steel tubes are easy to install and disassemble. The present invention can be used for passage way systems for water supply, air transmission, etc.
Description
(1) technical field: the present invention connects the book wall Stainless Steel Tube pipeline system of connections that pressure-bearing delivers fluid with what, belongs to pipe joint or pipe fitting (F16L) in the what engineering element.
(2) background technique: make pipelines such as pressure-bearing water supply, gas transmission with Stainless Steel Tube, its performance is best, and adopting the attenuating wall thickness then is to reduce the effective means (can save 2/3 stainless steel material) that the stainless steel cost is met the need of market.What follow appearance is the problem of optimal design of the book wall stainless steel joint for pipeline that uses or pipe fitting of matching with it.Use book wall Stainless Steel Tube in industries such as petrochemical industry, often suffer from because of the port insufficient strength, port circularity is subjected to outside destroy, and makes seal failure.This also is the weak link of unique book of book wall stainless steel pipeline.
The Chinese patent name is called ' book wall pipe assembly parts ' and (CN2251064Y) discloses a kind of structure, establishes the lining of public band omoplate at two steel pipe port endoporus, and two seal rings are located at respectively between lining inclined-plane and the oblique flange of two steel pipe enlargings.Though this lining is played a role to increasing the joint rigidity, but the sealing that this structure forms is fragile, therefore plants the sealing configuration that oblique flange sheet is not opened seal groove, when steel pipe heat expansion axial force is enclosed as easy as rolling off a log damage O shape, and also be difficult to during shrinkage recover, influence sealability.
(3) summary of the invention:
The present invention solves above-mentioned existing book wall Stainless Steel Tube exactly in connection place port intensity and corresponding sealing reliability problem.Its technological scheme is as follows:
The little flange connection pipe fitting of a kind of high pressure Stainless Steel Tube, connected two Stainless Steel Tube 1a, 1b puts what two flange 2a, in the 2b endoporus, two flange place circumference are established and are connected nut 4 and the nut 5 that compresses, and it is characterized in that being welded to connect with steel tube head and flange between steel pipe two ends and two flanges, flange adopts the small circle ring flange, is 1/4～2/3 of same model flange weight; An end face of flange has closure gasket groove 2.1 therein, is provided with the seal ring 3 that matches with it in it, and the seal ring cross section is an O shape or trapezoidal, and the matching relationship of seal ring and closure gasket groove is: V
2.1=(1.02-1.15) V
3, H
3=(1.2-1.4) H
2.1V wherein
2.1, H
2.1Be respectively the volume and the degree of depth of closure gasket groove 2.1; V
3, H
3Be respectively the volume and the height of seal ring 3.
The little flange connection pipe fitting of a kind of high pressure Stainless Steel Tube, connected two Stainless Steel Tube 1a, 1b put what two flange 2a, in the 2b endoporus, two flange place circumference are established and are connected nut 4 and the nut 5 that compresses, and it is characterized in that being provided with vertical flange 1 in the steel pipe two ends between steel pipe two ends and two flanges
1a, 1
1b, establish the internal expansion type stuffing box gland 7 or 8 that all steel is made between two flange and flange, the left and right Taper Pipe 7.1 that it is cooperated with cover in the flange mouth by two ends or 8.1 is formed with the sealing seat 7.2 or 8.2 that is connected and fixed two Taper Pipes and lays double density seal 6; Double density seal cross section is rectangle or O shape; Groove 7.3 on double density seal and the sealing seat or 8.3 matching relationship are: V
7.3=(1.02-1.15) V
6, H
6=(1.2-1.4) H
7.3, V wherein
7.3, H
7.3Be respectively the volume and the degree of depth of groove 7.3 or 8.3; V
6, H
6Be respectively the volume and the height of seal ring 6; Flange adopts the small circle ring flange, is 1/4～2/3 of same model flange weight.
Above-mentioned seal ring 3 and double density seal 6 all can adopt silicone rubber or nitrile rubber to make, and can add carbon fiber or metal or nonmetal backing member in this rubber.Two steel pipes that above-mentioned internal expansion type stuffing box gland connects are isometrical, then adopt isometrical internal expansion type stuffing box gland 7, if the reducing steel pipe then adopts reducing internal expansion type stuffing box gland 8.Difference d≤5 of left and right sides Taper Pipe 7.1 or 8.1 maximum outside diameter and the end steel tube inner hole that matches thread.
Beneficial effect of the present invention: (1) is to first kind of pipe fitting: both both were fixed with little flange welding what book wall Stainless Steel Tube port, and guaranteed the intensity and the circularity at book steel pipe two ends fully.Adopting little flange and O type or trapezoidal seal ring embedded groove inner structure, can make little flange thickness subtract book again, reduce expensive stainless steel material consumption, reduce cost greatly.Adopt totally-enclosed oxygen barrier formula sealing, increased the working life of sealing material and Sealing.Detect through hydraulic pressure, caliber DN100, DN125, three kinds of pipe fitting bearing capacities of DN150 all reach more than the 10Mpa, and the life-span reaches 50 years.(2) to secundal viae spare: book wall Stainless Steel Tube is after vertical flange and circularity adjustment, and port intensity is guaranteed; After being provided with the internal expansion type stuffing box gland again, the circularity of steel pipe port is guaranteed, under this double action, even be subjected to external impacts also can guarantee the circularity and the intensity of port accidentally, and then has guaranteed sealing effect.Its water pressure resistance ability all reaches more than the 10MPA.Adopt totally-enclosed oxygen barrier formula sealing, also increased the working life of sealing material and Sealing.(3) adopt little flange, in light weight, cost is low and easy installation and removal.(4) use embedding pressure type sealing means, the silicone rubber seal material, can reach more than 30 years working life.(5) first kinds of pipe fittings reach medical pipe fitting GMP standard.
(4) description of drawings:
Fig. 1 embodiment of the invention 1 structural drawing
Fig. 2 Fig. 1 item 3 shape of cross section figure
Fig. 3 embodiment of the invention 2 structural drawing
Fig. 4 embodiment of the invention 3 structural drawing
Fig. 5 Fig. 4 discipline 7 enlarged views
Fig. 6 embodiment of the invention 4 structural drawing
Fig. 7 Fig. 6 discipline 8 enlarged views
(5) embodiment:
Embodiment 1: see Fig. 1, Fig. 2
Connected two Stainless Steel Tube 1a and 1b put respectively in what two little flange 2a, the 2b endoporus, and steel tube head and flange are welded to connect; Two flange thicknesses can be different.The flange cylindrical has tension nut 4 and nut 5, and thick flange 2b end face is opened closure gasket groove 2.1, dress O V-shaped ring 3.1 or trapezoidal seal ring 3.2 in it, and its available silicon rubber is made, and also can make of other sealing material.Seal ring and closure gasket groove matching relationship are as follows: V
2.1=(1.02-1.15) V
3H
3=(1.2-1.4) H
2.1V wherein
2.1, H
2.1Be respectively the volume and the degree of depth of closure gasket groove 2.1; V
3, H
3Be respectively the volume and the height of seal ring 3.Under pressure, behind the silicone rubber compression 20%-40%, just in time all imbed in the groove, to form totally-enclosed oxygen barrier formula sealing.
Embodiment 2: see Fig. 3
By connecting two steel pipes is reducing, then with minor-diameter steel-tube termination 1
aAfter the reaming, weld with flange again.All the other structures are identical with embodiment 1.
Embodiment 3: see Fig. 4, Fig. 5
Between two flange and two flanges, establish the isometrical internal expanding stuffing box gland of making of stainless steel 7, it forms integrative-structure by identical left and right Taper Pipe 7.1 and sealing seat 7.2.Silicone rubber O RunddichtringO 6 is housed between sealing seat and flange, and Taper Pipe maximum dimension D 7 is 5 with the maximum difference of pipe diameter D1.O-ring seals 6 is as follows with internal expanding stuffing box gland 7 grooves on two sides 7.3 matching relationships: V
7.3=(1.02-1.15) V
6H
6=(1.2-1.4) H
7.3V wherein
7.3, H
7.3Be respectively the volume and the degree of depth of groove 7.3; V
6, H
6Be respectively the volume and the height of seal ring 6.Under pressure, after the silicone rubber compression 20%～40%, just in time all imbed in the groove, to form totally-enclosed oxygen barrier formula sealing.See Fig. 4, connected two Stainless Steel Tube 1a and 1b put respectively in what two little flange 2a, the 2b endoporus, and the flange cylindrical has tension nut 4 and nut 5.
Embodiment 4: see Fig. 6, Fig. 7
Be connected two diameter of steel tube D
1aAnd d
1bUnequal, reducing internal expanding stuffing box gland 8 then is set, it is made up of the left and right Taper Pipe 8.1a of reducing and 8.1b (forming 8.1) and sealing seat 8.2, sealing seat 8.2 bi-side and flange cooperation position recessing 8.3, embed reducing silicone rubber O-ring seals 6a, 6b, groove 8.3 and O-ring seals 6a, 6b matching relationship are identical with internal expanding stuffing box gland 7.Two Taper Pipe maximum outside diameter D8a, D8b respectively with the two pipe diameter D that cooperate
1a, D
1bPoor, all be chosen as within 5.All the other structures are identical with embodiment 3.
Claims (6)
1. the little flange connection pipe fitting of high pressure Stainless Steel Tube, connected two Stainless Steel Tubes (1a), (1b) put what two flanges (2a), (2b) in the endoporus, two flange place circumference are established and are connected nut (4) and the nut (5) that compresses, and it is characterized in that being welded to connect with steel tube head and flange between steel pipe two ends and two flanges, flange adopts the small circle ring flange, is 1/4～2/3 of same model flange weight; An end face of flange has closure gasket groove (2.1) therein, is provided with the seal ring (3) that matches with it in it, and the seal ring cross section is an O shape or trapezoidal, and the matching relationship of seal ring and closure gasket groove is: V
2.1=(1.02-1.15) V
3, H
3=(1.2-1.4) H
2.1, V wherein
2.1, H
2.1Be respectively the volume and the degree of depth of closure gasket groove (2.1); V
3, H
3Be respectively the volume and the height of seal ring (3).
2. by the described pipe fitting of claim 1, it is characterized in that seal ring (3) adopts silicone rubber or nitrile rubber to make.
3. the little flange connection pipe fitting of high pressure Stainless Steel Tube, connected two Stainless Steel Tubes (1a), (1b) put what two flanges (2a), (2b) in the endoporus, two flange place circumference are established and are connected nut (4) and the nut (5) that compresses, it is characterized in that between steel pipe two ends and two flanges, establish vertical flange (11a) in the steel pipe two ends, (11b), establish internal expansion type stuffing box gland (7) or (8) that all steel is made between two flange and flange, the left side that it is cooperated with cover in the flange mouth by two ends, right Taper Pipe (7.1) or (8.1) and be connected and fixed two Taper Pipes and lay sealing seat (7.2) or (8.2) composition of double density seal (6); Double density seal cross section is rectangle or O shape; The matching relationship of the groove on double density seal and the sealing seat (7.3) or (8.3) is: V
7.3=(1.02-1.15) V
6, H
6=(1.2-1.4) H
7.3, V wherein
7.3, H
7.3Be respectively the volume and the degree of depth of groove (7.3) or (8.3), V
6, H
6Be respectively the volume and the height of seal ring (6); Flange adopts the small circle ring flange, is 1/4～2/3 of same model flange weight.
4. by the described pipe fitting of claim 3, it is characterized in that double density seal employing silicone rubber or nitrile rubber making.
5. by claim 2 or 4 described pipe fittings, it is characterized in that to add in this rubber carbon fiber or metal or nonmetal backing member.
6. by the described pipe fitting of claim 3, maximum outside diameter that it is characterized in that left and right Taper Pipe (7.1) or (8.1) and difference d≤5 thread of matching and holding steel tube inner hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117217 CN1227470C (en) | 2003-01-23 | 2003-01-23 | Small flange connection fittings for high pressure stainless steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117217 CN1227470C (en) | 2003-01-23 | 2003-01-23 | Small flange connection fittings for high pressure stainless steel tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1431419A CN1431419A (en) | 2003-07-23 |
| CN1227470C true CN1227470C (en) | 2005-11-16 |
Family
ID=4790701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03117217 Expired - Fee Related CN1227470C (en) | 2003-01-23 | 2003-01-23 | Small flange connection fittings for high pressure stainless steel tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1227470C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454843A (en) * | 2010-10-18 | 2012-05-16 | 肖功宽 | Embedded-method anti-leakage technology for high-pressure water and gas conveyance |
| CN103148289B (en) * | 2013-03-08 | 2016-06-29 | 湖北中澳复合制品有限公司 | The preparation method of dredging large-diameter wearproof composite material tube |
| CN104728544A (en) * | 2015-03-19 | 2015-06-24 | 赵景宬 | Connecting pipe joint |
| CN106979396A (en) * | 2016-03-14 | 2017-07-25 | 江阴市诺普得机械有限公司 | Socket welding flange |
| CN109882672B (en) * | 2019-04-18 | 2021-04-06 | 四川民生管业有限责任公司 | Flexible high-pressure-resistant short-arm flange |
-
2003
- 2003-01-23 CN CN 03117217 patent/CN1227470C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1431419A (en) | 2003-07-23 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051116 Termination date: 20210123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |