CN201050652Y - Self-tightening type flange - Google Patents
Self-tightening type flange Download PDFInfo
- Publication number
- CN201050652Y CN201050652Y CNU2007200797832U CN200720079783U CN201050652Y CN 201050652 Y CN201050652 Y CN 201050652Y CN U2007200797832 U CNU2007200797832 U CN U2007200797832U CN 200720079783 U CN200720079783 U CN 200720079783U CN 201050652 Y CN201050652 Y CN 201050652Y
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- utility
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Abstract
The utility model relates to a self-fastening flange, which comprises hubs, a clamp ring, a T-shaped seal ring, and connection bolts. The utility model is characterized in that the two shoulder parts of the seal ring are all designed to the structure of a single angular surface, the leg of the T-shaped ring is positioned between the two hubs, the two shoulder parts are in conical contact with the hubs, thereby forming lip seal, and the middle part of the clamp ring is symmetrically provided with stress detecting grooves. The utility model has the advantage that the seal ring is in conical contact with the end surface of the flange to form elastic contact, the higher the pressure is, the better the self-fastening tightness is. The utility model greatly increases the flange functions of tension resistance, compressive resistance, bending resistance, and impact resistance, and has the advantages that the structure is simple, the processing and the maintenance are convenient, and can very conveniently detect and set the initial pre-tightening force through the detecting grooves.
Description
Technical field
The utility model relates to a kind of self tightening flange, particularly a kind of self tightening flange that is widely used in oil, chemical industry, Aero-Space, the connection of composite processing and other fields pipeline.
Background technique
The conventional flange sealing is by the tension that is threaded, and flange itself can bear bigger moment of flexure, is with when pressing operation, and the interior pressure of medium will make potted line lax vertically in the pipe, thereby reduce the joint sealability, will strengthen the pretightening force of bolt when installing for this reason.When pipeline pressure increased, the moment of flexure that flange bears increased thereupon, and obdurability reduces, and caused the flange arrangement size to strengthen, and weight increases, but flange sealability in working order is still than low under the pretension state.Because the connecting bolt parallel axes is in the pipeline axial setting, the pipe-line system additional load that is produced under running state will directly be born by connecting bolt, can influence sealability equally.Seal ring adopts German-style metal lensring usually, contacts with the flange end upper thread, and its surface of contact is narrow, and required sealing load is big, does not have from close effect, and sealability is relatively poor.Adopt after the T type sealing structure circle, can improve sealability preferably, but owing to consider the elastic deformation amount of diverse location, its shoulder inclined design of T type sealing structure circle that adopts is a double inclined plane now, cause processed complex, required pretightening force is bigger, and what generally be higher than calculated value could satisfy the initial sealing requirement more than 20%.Initial pretightening force causes the seal ring amount of deformation big greatly again, has correspondingly shortened its working life.
The model utility content
The purpose of this utility model is to provide a kind of self tightening flange, and to reach the sealability height, obdurability is good, and volume is little, and is simple in structure, mounting or dismounting and purpose easy to maintenance.
Solution of the present utility model is that this kind self tightening flange comprises joint cover, clamp ring, T RunddichtringO, connecting bolt, it is characterized in that described seal ring two shoulders all are designed to monocline face structure, the shin pin of T type ring is between two joint covers, two shoulders contact with the joint cover conical surface, form lip seal, and have stress detection groove in clamp ring middle part symmetry.
Above-mentioned connecting bolt axis normal is in the pipeline axial setting.
Advantage of the present utility model is that T RunddichtringO two shoulders all are designed to monocline face structure, easy to process, make simple, because design has stress to detect groove, can measure initial pretightening force by detecting groove easily, can set required pretightening force exactly as required, thereby reduce the seal ring amount of deformation, prolong working life.And because seal ring contacts by the conical surface with end face of flange, form a kind of Elastic Contact, can self-tightening sealing when pressurized, also played simultaneously the effect of reinforcing, pressure is high more, and the self-tightening sealing performance is good more, has greatly improved tension, resistance to compression, counter-bending, the shock resistance of flange, and have simple in structure, processing and advantage easy to maintenance.Because this structure connecting bolt perpendicular to the pipeline setting, only needs initial pretightening force to tighten, and has reduced the moment of flexure that flange itself bears.
Description of drawings
Accompanying drawing 1 is the utility model plan view;
Accompanying drawing 2 is left views of accompanying drawing 1.
Among the figure: 1, seal ring; 2, clamp ring; 3, double-screw bolt; 4, joint cover; 5, detect groove; 6, nut.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is further described.
With the ZYDN100 type is the example explanation: 300 ℃ of design temperatures, and design pressure 25MPa, seal ring 1 adopts high temperature resistant high nichrome A638GR660 to make, double-screw bolt 3 and nut 6 adopt 35 chrome molybdenum A to make, clamp ring 2 and joint cover 4 adopt 20 manganese to make, and detect groove 5 width 9mm, degree of depth 5mm.
During installation, will save cover 4 location earlier, and use the material of no grinding to remove lubricant oil and seal ring 1 surface of saving on cover 4 sealing surfaces, joint cover 4 sealing surfaces of then seal ring 1 being packed into keep seal ring 1 shoulder and joint cover 4 end faces that certain clearance is arranged.Entangle joint cover 4 with clamp ring 2, coat oiling agent in the clamp ring 2 and the contact segment of joint cover 4, to reduce friction.In the screw of clamp ring 2, insert double-screw bolt 3, put fastening nut 6, determine initial pretightening force by detecting groove 5, fastening nut 6 then, make the groove of bolt and clamp ring 2 be criss-crossing, the bolt that exposes at two part about equally, the end faces of two joint covers 4 should closely contact with the flank of seal ring 1 after the installation.
Claims (2)
1. self tightening flange, comprise joint cover, clamp ring, T RunddichtringO, connecting bolt, it is characterized in that described seal ring two shoulders all are designed to monocline face structure, the shin pin of T type ring is between two joint covers, two shoulders contact with the joint cover conical surface, form lip seal, and have stress detection groove in clamp ring middle part symmetry.
2. self tightening flange according to claim 1 is characterized in that described connecting bolt axis normal is in the pipeline axial setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200797832U CN201050652Y (en) | 2007-06-01 | 2007-06-01 | Self-tightening type flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200797832U CN201050652Y (en) | 2007-06-01 | 2007-06-01 | Self-tightening type flange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201050652Y true CN201050652Y (en) | 2008-04-23 |
Family
ID=39337139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200797832U Expired - Lifetime CN201050652Y (en) | 2007-06-01 | 2007-06-01 | Self-tightening type flange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201050652Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847981A (en) * | 2015-06-12 | 2015-08-19 | 上海中船三井造船柴油机有限公司 | Connecting apparatus of dual-wall high-pressure gas pipelines |
| CN105114297A (en) * | 2015-09-10 | 2015-12-02 | 珠海格力电器股份有限公司 | Seal structure of diaphragm pump head cover |
| CN105782605A (en) * | 2016-05-12 | 2016-07-20 | 陕西建工安装集团有限公司 | Pressure resisting type air pipe air leakage preventing structure of ventilation air conditioner system and air pipe joint machining method |
| CN105889670A (en) * | 2016-05-24 | 2016-08-24 | 无锡市华尔泰机械制造有限公司 | Anti-fatigue alternating high-pressure self-tightening flange and application method thereof |
| CN106337982A (en) * | 2016-11-24 | 2017-01-18 | 成都植源机械科技有限公司 | High-pressure self-tightening flange |
| CN107781548A (en) * | 2017-11-29 | 2018-03-09 | 无锡市华尔泰机械制造有限公司 | A kind of high pressure self-tightening flange flushed with internal diameter of the pipeline |
| CN108278433A (en) * | 2017-12-28 | 2018-07-13 | 上海中船三井造船柴油机有限公司 | A kind of attachment device of double wall high-pressure gas pipelines |
-
2007
- 2007-06-01 CN CNU2007200797832U patent/CN201050652Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847981A (en) * | 2015-06-12 | 2015-08-19 | 上海中船三井造船柴油机有限公司 | Connecting apparatus of dual-wall high-pressure gas pipelines |
| CN105114297A (en) * | 2015-09-10 | 2015-12-02 | 珠海格力电器股份有限公司 | Seal structure of diaphragm pump head cover |
| CN105782605A (en) * | 2016-05-12 | 2016-07-20 | 陕西建工安装集团有限公司 | Pressure resisting type air pipe air leakage preventing structure of ventilation air conditioner system and air pipe joint machining method |
| CN105889670A (en) * | 2016-05-24 | 2016-08-24 | 无锡市华尔泰机械制造有限公司 | Anti-fatigue alternating high-pressure self-tightening flange and application method thereof |
| CN106337982A (en) * | 2016-11-24 | 2017-01-18 | 成都植源机械科技有限公司 | High-pressure self-tightening flange |
| CN107781548A (en) * | 2017-11-29 | 2018-03-09 | 无锡市华尔泰机械制造有限公司 | A kind of high pressure self-tightening flange flushed with internal diameter of the pipeline |
| CN107781548B (en) * | 2017-11-29 | 2023-10-31 | 无锡市华尔泰机械制造有限公司 | High-pressure self-tightening flange flush with inner diameter of pipeline |
| CN108278433A (en) * | 2017-12-28 | 2018-07-13 | 上海中船三井造船柴油机有限公司 | A kind of attachment device of double wall high-pressure gas pipelines |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080423 |
|
| CX01 | Expiry of patent term |