CN109737255B - High-pressure sealing structure for rubber lining pipe fitting - Google Patents

High-pressure sealing structure for rubber lining pipe fitting Download PDF

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Publication number
CN109737255B
CN109737255B CN201910073736.4A CN201910073736A CN109737255B CN 109737255 B CN109737255 B CN 109737255B CN 201910073736 A CN201910073736 A CN 201910073736A CN 109737255 B CN109737255 B CN 109737255B
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China
Prior art keywords
flange
gasket
groove
pipe fitting
ring
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CN201910073736.4A
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CN109737255A (en
Inventor
魏新林
吴晓
范国杰
董高辉
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Zhengzhou Zhonghaiwei Environmental Protection Technology Co ltd
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Zhengzhou Zhonghaiwei Environmental Protection Technology Co ltd
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Priority to CN201910073736.4A priority Critical patent/CN109737255B/en
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Abstract

The invention relates to a high-pressure sealing structure of a rubber lining pipe fitting, which comprises a straight pipe, wherein a flange is arranged at the end part of the straight pipe, a rubber lining is arranged on the inner wall of the straight pipe, the flanges are connected through bolts, a first groove is formed in the outer side of the flange, a second groove is formed in the inner side sealing surface of the flange, a gasket is arranged between adjacent straight pipes, the gasket is a circular metal winding gasket, the gasket comprises an inner ring, a filling layer and an outer ring, and positioning rings are respectively arranged on two sides of the outer ring; the invention has the advantages of reasonable structure, convenient use, good sealing performance and long service life.

Description

High-pressure sealing structure for rubber lining pipe fitting
Technical Field
The invention belongs to the technical field of pipe fitting connection, and particularly relates to a high-pressure sealing structure of a rubber lining pipe fitting.
Background
When the straight pipes with the rubber liners are connected, the flanges are generally adopted for connection, the rubber liners are generally arranged in two ways, one way is that the rubber liners are turned up to the sealing surface of the flanges, the width of the sealing surface of the flanges is reduced, high-pressure conveying cannot be born, and the leakage risk is high; the other is that the rubber is not turned over, and the inner wall of the straight pipe is easy to be scoured by slurry to degum, so that the pipeline is corroded to reduce the service life; therefore, it is necessary to provide a high-pressure sealing structure for rubber lining pipe fittings, which has reasonable structure, convenient use, good sealing performance and long service life.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the high-pressure sealing structure of the rubber lining pipe fitting, which has the advantages of reasonable structure, convenience in use, good sealing performance and long service life.
The purpose of the invention is realized in the following way: the utility model provides a rubber lining pipe fitting high pressure seal structure, it includes the straight tube, the tip of straight tube be provided with the flange, the inner wall of straight tube be provided with the rubber lining, the flange be connected through the bolt, the outside of flange be provided with first recess, the inboard sealed face of flange be provided with the second recess, adjacent straight tube between be provided with the gasket, the gasket be annular metal winding gasket, the gasket include inner ring, filling layer, outer ring, the both sides of outer ring be provided with the holding ring respectively.
The bolt is a full-thread bolt.
The inner ring is a stainless steel inner ring.
The inner ring is a 304 stainless steel winding wire inner ring.
The filling layer is flexible graphite.
The outer ring is a galvanized carbon steel winding wire outer ring.
The positioning ring is a galvanized carbon steel positioning ring.
The section of the second groove is L-shaped.
The flange of the rubber lining is flush with the sealing surface of the flange after filling the second groove of the flange.
The invention has the beneficial effects that: the inner side of the flange is provided with the second groove, the rubber lining is stuck to the inner wall of the straight pipes when being arranged, the flange is embedded into the second groove, and then the gasket is placed between the two straight pipes; the invention has the following advantages: (1) the flange with the rubber lining is embedded into the second groove, so that the sealing width is increased, and the sealing effect is good; (2) the gasket, the gasket inner ring, the gasket filling layer and the gasket outer ring are adopted to achieve high-pressure sealing strength and can bear fluid conveying pressure of 15 MPa; (3) the flange is embedded into the second groove by adopting the rubber lining flanging, so that the flange can be prevented from being corroded, and the service life is prolonged; the invention has the advantages of reasonable structure, convenient use, good sealing performance and long service life.
Drawings
FIG. 1 is a schematic view of a high pressure seal structure for a rubber lined pipe fitting according to the present invention.
Fig. 2 is a schematic view of a part of a high-pressure sealing structure of a rubber-lined pipe fitting according to the present invention.
Fig. 3 is a schematic diagram showing a part of a high-pressure sealing structure of a rubber-lined pipe fitting according to the present invention.
Fig. 4 is a schematic structural view of a gasket of a high-pressure sealing structure for rubber-lined pipe fittings according to the present invention.
In the figure: 1. rubber lining 2, straight tube 3, flange 4, nut 5, gasket 6, first recess 7, bolt 8, outer loop 9, holding ring 10, filling layer 11, inner ring 12, second recess.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1-4, a high-pressure sealing structure of a rubber lining pipe fitting comprises a straight pipe 2, wherein a flange 3 is arranged at the end part of the straight pipe 2, a rubber lining 1 is arranged on the inner wall of the straight pipe 2, the flange 3 is connected through bolts 7, a first groove 6 is arranged on the outer side of the flange 3, a second groove 12 is arranged on the inner side sealing surface of the flange 3, a gasket 5 is arranged between the adjacent straight pipes 2, the gasket 5 is a circular metal winding gasket, the gasket 5 comprises an inner ring 11, a filling layer 10 and an outer ring 8, positioning rings 9 are respectively arranged on two sides of the outer ring 8, and the flange 1 is turned up to fill the second groove 12 of the flange 3 and then is flush with the sealing surface of the flange 3.
The inner side of the flange 3 is provided with the second groove 12, the rubber lining 1 is stuck on the inner wall of the straight pipe when in arrangement, the flanging is embedded into the second groove 12, then the gasket 5 is placed between the two straight pipes 2, and as the gasket 5 is provided with the positioning ring 9, the outer side of the flange 3 is provided with the groove 6, and the positioning ring 9 is matched with the groove 6, so that the gasket 5 is positioned accurately; the invention has the following advantages: (1) the flange of the rubber lining 1 is embedded into the second groove 12, so that the sealing width is increased, and the sealing effect is good; (2) the gasket 5 is adopted, and the gasket 5 comprises an inner ring 11, a filling layer 10 and an outer ring 8, so that high-pressure sealing strength is achieved, and the fluid conveying pressure of 15MPa can be born; (3) the flange 3 can be prevented from being corroded by embedding the flange of the rubber lining 1 into the second groove 12, so that the service life is prolonged; the invention has the advantages of reasonable structure, convenient use, good sealing performance and long service life.
Example 2
As shown in fig. 1-4, a high-pressure sealing structure of a rubber lining pipe fitting comprises a straight pipe 2, a flange 3 is arranged at the end part of the straight pipe 2, a rubber lining 1 is arranged on the inner wall of the straight pipe 2, the flange 3 is connected through bolts 7, a first groove 6 is arranged on the outer side of the flange 3, a second groove 12 is arranged on the lower side sealing surface of the flange 3, a gasket 5 is arranged between the adjacent straight pipes 2, the gasket 5 is a circular metal winding gasket, the gasket 5 comprises an inner ring 11, a filling layer 10 and an outer ring 8, and positioning rings 9 are respectively arranged on two sides of the outer ring 8.
For better effect, the bolt 7 is a full-thread bolt, and the tightness of connection and installation is convenient by adopting the full-thread bolt.
For better effect, the inner ring 11 is a stainless steel inner ring, has higher strength and has good anti-corrosion effect.
For better effect, the inner ring 11 is a 304 stainless steel winding wire inner ring.
For better effect, the filling layer 10 is flexible graphite, so that the sealing performance of the connection is improved.
For better effect, the outer ring 8 is a galvanized carbon steel wound wire outer ring.
For better effect, the positioning ring 9 is a galvanized carbon steel positioning ring.
For better effect, the section of the second groove is L-shaped.
For better effect, the flanging of the rubber lining 1 is flush with the sealing surface of the flange 3 after filling the second groove 12 of the flange 3.
The inner side of the flange 3 is provided with the second groove 12, the rubber lining 1 is stuck on the inner wall of the straight pipe when in arrangement, the flanging is embedded into the second groove 12, then the gasket 5 is placed between the two straight pipes 2, and as the gasket 5 is provided with the positioning ring 9, the outer side of the flange 3 is provided with the groove 6, and the positioning ring 9 is matched with the groove 6, so that the gasket 5 is positioned accurately; the invention has the following advantages: (1) the flange of the rubber lining 1 is embedded into the second groove 12, so that the sealing width is increased, and the sealing effect is good; (2) the gasket 5 is adopted, and the gasket 5 comprises an inner ring 11, a filling layer 10 and an outer ring 8, so that high-pressure sealing strength is achieved, and the fluid conveying pressure of 15MPa can be born; (3) the flange 3 can be prevented from being corroded by embedding the flange of the rubber lining 1 into the second groove 12, so that the service life is prolonged; the invention has the advantages of reasonable structure, convenient use, good sealing performance and long service life.

Claims (7)

1. The utility model provides a rubber lining pipe fitting high pressure seal structure, it includes straight tube, its characterized in that: the end part of the straight pipe is provided with a flange, the inner wall of the straight pipe is provided with a rubber lining, the flanges are connected through bolts, the outer side of the flange is provided with a first groove, the inner side sealing surface of the flange is provided with a second groove, a gasket is arranged between adjacent straight pipes, the gasket is a circular metal winding gasket, the gasket comprises an inner ring, a filling layer and an outer ring, and positioning rings are respectively arranged on two sides of the outer ring; the section of the second groove is L-shaped; the flange of the rubber lining is flush with the sealing surface of the flange after filling the second groove of the flange.
2. A high pressure seal for rubber lined pipe fitting as defined in claim 1, wherein: the bolt is a full-thread bolt.
3. A high pressure seal for rubber lined pipe fitting as defined in claim 1, wherein: the inner ring is a stainless steel inner ring.
4. A high pressure seal for rubber lined pipe fittings as defined in claim 3, wherein: the inner ring is a 304 stainless steel winding wire inner ring.
5. A high pressure seal for rubber lined pipe fitting as defined in claim 1, wherein: the filling layer is flexible graphite.
6. A high pressure seal for rubber lined pipe fitting as defined in claim 1, wherein: the outer ring is a galvanized carbon steel winding wire outer ring.
7. A high pressure seal for rubber lined pipe fitting as defined in claim 1, wherein: the positioning ring is a galvanized carbon steel positioning ring.
CN201910073736.4A 2019-01-25 2019-01-25 High-pressure sealing structure for rubber lining pipe fitting Active CN109737255B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910073736.4A CN109737255B (en) 2019-01-25 2019-01-25 High-pressure sealing structure for rubber lining pipe fitting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910073736.4A CN109737255B (en) 2019-01-25 2019-01-25 High-pressure sealing structure for rubber lining pipe fitting

Publications (2)

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CN109737255A CN109737255A (en) 2019-05-10
CN109737255B true CN109737255B (en) 2023-12-19

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127287A (en) * 1975-12-17 1978-11-28 Le Carbone (Great Britain) Limited Pipe joints
US5876070A (en) * 1996-12-11 1999-03-02 Kennecott Holdings Corporation Pipe flange connection for pressure retaining, abrasive/corrosive service
CN202274096U (en) * 2011-09-23 2012-06-13 浙江国泰密封材料股份有限公司 Embedded type graphite metal gasket
CN106884985A (en) * 2017-03-03 2017-06-23 慈溪市高新密封材料有限公司 A kind of SW with outside ring
CN107061894A (en) * 2017-03-03 2017-08-18 慈溪市高新密封材料有限公司 A kind of spirotallic gasket
CN206572108U (en) * 2017-03-03 2017-10-20 慈溪市高新密封材料有限公司 Corrosion resistant type spirotallic gasket
CN209725530U (en) * 2019-01-25 2019-12-03 郑州中海威环保科技有限公司 A kind of rubber lining pipe fitting high pressure seal structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127287A (en) * 1975-12-17 1978-11-28 Le Carbone (Great Britain) Limited Pipe joints
US5876070A (en) * 1996-12-11 1999-03-02 Kennecott Holdings Corporation Pipe flange connection for pressure retaining, abrasive/corrosive service
CN202274096U (en) * 2011-09-23 2012-06-13 浙江国泰密封材料股份有限公司 Embedded type graphite metal gasket
CN106884985A (en) * 2017-03-03 2017-06-23 慈溪市高新密封材料有限公司 A kind of SW with outside ring
CN107061894A (en) * 2017-03-03 2017-08-18 慈溪市高新密封材料有限公司 A kind of spirotallic gasket
CN206572108U (en) * 2017-03-03 2017-10-20 慈溪市高新密封材料有限公司 Corrosion resistant type spirotallic gasket
CN209725530U (en) * 2019-01-25 2019-12-03 郑州中海威环保科技有限公司 A kind of rubber lining pipe fitting high pressure seal structure

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