CN2791433Y - Large-diameter metal sealed loose flange - Google Patents
Large-diameter metal sealed loose flange Download PDFInfo
- Publication number
- CN2791433Y CN2791433Y CN 200520109264 CN200520109264U CN2791433Y CN 2791433 Y CN2791433 Y CN 2791433Y CN 200520109264 CN200520109264 CN 200520109264 CN 200520109264 U CN200520109264 U CN 200520109264U CN 2791433 Y CN2791433 Y CN 2791433Y
- Authority
- CN
- China
- Prior art keywords
- flange
- outer shroud
- kink
- ring
- inner chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Pressure Vessels And Lids Thereof (AREA)
Abstract
The utility model relates to a full metal sealed loose flange with large diameter (greater than 250mm), which is used for high vacuum sealed connection. The utility model controls the spacing thickness from the edge of an attachment bolt hole of a loose outer ring positioned on the lateral side of a sealed knife edge of a shoulder ring to an inner chamber within 1mm to 2mm, and keeps the gap between the inner circle of the inner chamber and the outer circle of the shoulder ring within 0.1mm to 0.3mm. The sealed knife edge of the sealed loose flange of the utility model is concave. The best spacing thickness from the edge of the attachment bolt hole of the loose outer ring positioned on the lateral side of the sealed knife edge of the shoulder ring to the inner chamber is 1.1mm, and the structure can obtain a best effect.
Description
Technical field
The utility model relates to a kind of heavy caliber (greater than 250mm) full-metallic sealing lap joint flange that high vacuum seal connects that is used for.The utility model is by the kink outer shroud that has the circumferential coupling bolt hole that is provided with in edge and place the flange shoulder ring that has the sealing edge of a knife that matches with the sealing filamentary silver of kink outer shroud inner chamber to form.Radially be provided with a tapped through hole at the kink outer shroud at least along it, in described through hole, be combined with jackscrew, be provided with the annular groove of an indent at the cylindrical of flange shoulder ring, one end of described jackscrew embeds in the interior concave ring groove set on the flange shoulder ring cylindrical when mated condition, make the outer interannular motion vertically of flange shoulder ring and kink restrained, and make the sealing edge of a knife face of flange shoulder ring be positioned at the inside of kink outer shroud sealing all the time in conjunction with end face.
Background technique
Lap joint flange is a kind of in the flange, for example Chinese utility model patent 03262490.5 disclosed small-bore (being less than or equal to 250mm) lap joint flange.The fastening flange of prior art and the lap joint flange edge of a knife identical (being called the CF flange) that matches mutually with it, be that flange shoulder ring and connected tube welding is fixing during use, the sealing edge of a knife of flange shoulder ring with the sealing edge of a knife of the fastening flange of pairing mutually between liner metal o-ring (being generally anaerobic copper band or aluminium circle), can be easy to kink outer shroud upper bolt hole is aimed at the fastening flange upper bolt hole by rotating kink, install with convenient.When reality is used, with the bolt of the fastening flange upper bolt hole that passes kink outer shroud upper bolt hole and correspondence and the nut that matches, the realization lap joint flange is connected with fastening flange, and the fastening force that utilizes bolt passes through the power transfer function of lap joint flange inner chamber bottom surface to the flange shoulder ring ear end face, the sealing edge of a knife of flange is pressed into metal packing washer, forms sealing.Diameter is greater than the sealing flange of 250mm in the prior art, and the edge of a knife of one end flange is protruding, and Pei Dui the other end flange edge of a knife is recessed with it, and the centre seals with filamentary silver.Present this major diameter flange does not also have the form of kink.An end of existing this major diameter flange can be made the kink form theoretically, but in actual the enforcement many technical problems that can't overcome be arranged.As the too small meeting in gap of deciding outer shroud and shoulder interannular makes flange shoulder ring and outer shroud locking because of the error of processing or welding, and this phenomenon is after shoulder ring and system welding are fixed, and is more outstanding.When the shoulder ring can't rotate the effect that has also just lost lap joint flange with the outer shroud locking; Though can overcome its deficiency by the mode that strengthens the gap between outer shroud inner chamber and shoulder ring cylindrical, but because the distance between the fixing bolt of flange seal effect and flange and the sealing edge of a knife has direct relation, its distance heals little sealing effect better theoretically, to make the distance between the sealing edge of a knife and fixing bolt become big if strengthen the gap of outer shroud and shoulder interannular, and make sealing effect become bad, simultaneously also can excesssive gap make the rigidity variation of its structure.By reducing the interval of attachment bolt bore edges and its inner chamber on the outer shroud, making the gap increasing between outer shroud inner chamber and shoulder ring cylindrical is to solve existing deficiency, but can produce because of the gap between outer shroud inner chamber and attachment bolt bore edges too small, cause bolt hole and outer shroud inner chamber to connect, cause seal break-off.How solving heavy caliber lap joint flange outer shroud not by locking, determine the geometrical relationship that lap joint flange is suitable, guarantee its sealing effect, is heavy caliber lap joint flange problem anxious to be solved.
Summary of the invention
The utility model provides a kind of prior art deficiency that overcomes, and is applicable to heavy caliber (diameter is greater than the 250 millimeters) lap joint flange of work under the high vacuum condition, and it can have better sealing effect simultaneously.
The utility model is that the attachment bolt bore edges that the kink outer shroud is positioned at the sealing edge of a knife side of shoulder ring is controlled at 1～2mm with the spacer thickness of its inner chamber, and makes in the inner chamber circle encircle the cylindrical gap with shoulder to remain on 0.1～0.3mm.
The sealing edge of a knife of heavy caliber metallic seal lap joint flange of the present utility model is a matrix.
According to the test of reality, kink outer shroud of the present utility model is positioned at the attachment bolt bore edges of the sealing edge of a knife side of takeing on ring and the optimal spacing thickness of its inner chamber is 1.1mm, and this structure can make it that best effect is arranged.
The structure that the utility model adopts shows that through test and actual application it can avoid issuable in the mill fixed bolt hole of flange and outer shroud inner chamber to connect, and is directed at the disadvantage of seal break-off under existing mechanical processing technique prerequisite; Can make simultaneously the sealing edge of a knife and fixing bolt on the shoulder ring keep minimum distance, to obtain the optimal seal effect.When the sealing edge of a knife of lap joint flange was matrix, its edge of a knife was not easy to be bruised when the kink outer shroud was made longitudinally-moving.
Description of drawings
Accompanying drawing 1 is the half section schematic representation of the utility model specific embodiment, and accompanying drawing 2 is the local enlarged diagram in A position in the accompanying drawing 1.Among the figure: 1 is the outer shroud of lap joint flange, set inner concave shape annular groove on the cylindrical of 2 shoulder rings, 3 are the shoulder ring, 4 for connecing the vacuum system that connects with the shoulder boxing, 5 is the bolt hole on the outer shroud, 6 go up the set sealing edge of a knife (this edge of a knife is a matrix as seen from the figure) for shoulder ring, the 7th, outer shroud is positioned at the attachment bolt bore edges and the interval of its inner chamber of the sealing edge of a knife side of shoulder ring, the 8th, in the inner chamber circle with take on the gap of encircling between the cylindrical.
Embodiment
The utility model is below in conjunction with description of drawings:
By accompanying drawing 1 as seen, lap joint flange design of the present utility model is at recessed flange end, constitute lap joint flange by shoulder ring 3 and the outer shroud 1 that is placed in outside it, shoulder ring 3 and vacuum system 4 are fixed together by welding manner, at state to be installed, match with the inner concave shape annular groove 2 that shoulder encircles on 3 with jackscrew (not expression in the accompanying drawing) on the outer shroud 1, make shoulder ring 3 its rotational relatively, so that set hole 5 is aimed at the corresponding aperture on the fastening flange on the outer shroud.In installment state, jackscrew is screwed out, pass set hole on hole 5 and the fastening flange with bolt, be mated with nut again, lap joint flange and fastening flange are fixed, by the effect of 1 pair of shoulder ring 3 of outer shroud, will place the stuffing box packing of the set edge of a knife on the edge of a knife 6 places and the fastening flange to compress generation deformation simultaneously, realize sealing.In the utility model, the gap 8 that shoulder ring 3 and outer shroud are 1 is 0.1～0.3mm, and the interval 7 of the attachment bolt bore edges of outer shroud and its inner chamber is 1～2mm, this structure both can guarantee to be used under the large-diameter flanged condition at the utility model, outer shroud 1 is at state to be installed, particularly the shoulder ring can not take place by the deficiency of locking after welding with system, can avoid simultaneously when adopting existing process equipment processing outer shroud inner chamber and coupling bolt hole yet, and generation connects the deficiency that lost efficacy.
Among the embodiment of the present utility model, used lap joint flange diameter is 450mm, and the thickness at interval 7 is 1.1mm in its structure, and the thickness in gap 8 is 0.3mm, when the filamentary silver of employing 2mm is the stuffing box packing of the edge of a knife between flange, through leak rate≤1 * 10 of actual measurement kink edge of a knife flange
-9Pa.l/s can guarantee vacuum system degree of vacuum≤10 fully
-10The designing requirement of Pa.
Claims (3)
1, heavy caliber metallic seal lap joint flange, to comprise the kink outer shroud that has coupling bolt hole, place the flange shoulder ring of the sealing edge of a knife that matches with sealing material having of kink outer shroud inner chamber, and the kink external loop diameter is to being provided with a tapped through hole at least, in described through hole, be combined with jackscrew, be provided with the annular groove of an indent at the cylindrical of flange shoulder ring, one end of described jackscrew embeds in the interior concave ring groove set on the flange shoulder ring cylindrical when mated condition, make the outer interannular motion vertically of flange shoulder ring and kink restrained, and the sealing edge of a knife face that makes flange shoulder ring all the time is positioned at the inside of kink outer shroud sealing in conjunction with end face, it is characterized in that the kink outer shroud is positioned at the attachment bolt bore edges of the sealing edge of a knife side of takeing on ring and the spacer thickness of its inner chamber is 1～2 millimeter, circle is 0.1～0.3 millimeter with takeing on ring cylindrical gap in the inner chamber.
2, heavy caliber metallic seal lap joint flange according to claim 1, it is characterized in that sealing the edge of a knife is matrix.
3, heavy caliber metallic seal lap joint flange according to claim 1 and 2 is characterized in that the kink outer shroud is positioned at the attachment bolt bore edges of the sealing edge of a knife side of takeing on ring and the spacer thickness of its inner chamber is 1.1 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520109264 CN2791433Y (en) | 2005-05-31 | 2005-05-31 | Large-diameter metal sealed loose flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520109264 CN2791433Y (en) | 2005-05-31 | 2005-05-31 | Large-diameter metal sealed loose flange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2791433Y true CN2791433Y (en) | 2006-06-28 |
Family
ID=36807503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520109264 Expired - Fee Related CN2791433Y (en) | 2005-05-31 | 2005-05-31 | Large-diameter metal sealed loose flange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2791433Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807531A (en) * | 2014-02-25 | 2014-05-21 | 中国科学院电子学研究所 | Lap joint metal sealing flange |
| CN108413149A (en) * | 2018-04-28 | 2018-08-17 | 建湖县博奥液压机械制造有限公司 | A kind of connection flange |
-
2005
- 2005-05-31 CN CN 200520109264 patent/CN2791433Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807531A (en) * | 2014-02-25 | 2014-05-21 | 中国科学院电子学研究所 | Lap joint metal sealing flange |
| CN108413149A (en) * | 2018-04-28 | 2018-08-17 | 建湖县博奥液压机械制造有限公司 | A kind of connection flange |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060628 Termination date: 20120531 |