CN210770830U - Connecting structure of metal corrugated pipe compensator - Google Patents
Connecting structure of metal corrugated pipe compensator Download PDFInfo
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- CN210770830U CN210770830U CN201921454425.4U CN201921454425U CN210770830U CN 210770830 U CN210770830 U CN 210770830U CN 201921454425 U CN201921454425 U CN 201921454425U CN 210770830 U CN210770830 U CN 210770830U
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- corrugated pipe
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Abstract
A connecting structure of a metal corrugated pipe compensator belongs to the technical field of blast furnace pipeline equipment and is used for prolonging the service life of the metal corrugated pipe compensator. The technical scheme is as follows: the end faces of the carbon steel pipes at the two ends of the compensator are respectively and vertically welded with carbon steel pipe annular flanges, the front end of a stainless steel corrugated pipe in the middle of the compensator vertically extends to the center to form an annular connecting end face, the annular connecting end face is opposite to the carbon steel pipe annular flanges welded on the end faces of the carbon steel pipes, the inner side annular flanges of the corrugated pipe are respectively placed on the inner sides of the two ends of the stainless steel corrugated pipe, and a connecting bolt penetrates through a connecting screw hole to tightly connect the carbon steel pipe annular flanges, the annular connecting end face and the inner side annular. The utility model discloses change the carbon steel pipe of current corrugated metal pipe compensator and stainless steel bellows's welded connection into with flange joint, will seal to change flange joint into and seal the material sealedly, fundamentally has stopped the corruption of high corrosive liquids to material hot melt degeneration behind the welding to the life of compensator has been prolonged.
Description
Technical Field
The utility model relates to a connection structure for prolonging the service life of a metal corrugated pipe compensator, which belongs to the technical field of blast furnace pipeline equipment.
Background
In recent years, with the rapid improvement of steel yield in China, the scale of a blast furnace is continuously increased, the use proportion of external ores in furnace materials is increased, the content of corrosive components in blast furnace gas is increased due to the fact that the external ores are in contact with seawater rich in CI ions in the process of marine transportation, CaCl2 is added in a sintering process, and new process technologies of full-dry dedusting and coal injection are adopted, the corrosivity of a metal corrugated pipe compensator in a gas pipe network is greatly improved, and the metal corrugated pipe compensator is often required to be replaced due to corrosion damage after the operation of about one year or even several months. A large number of metal corrugated pipe compensators are corroded and leaked in batches, thereby seriously influencing the safe operation of equipment and the economic benefit of enterprises and becoming a prominent problem to be solved urgently by various iron and steel plants.
The failure of the metal bellows compensator during operation is mainly manifested in two forms of corrosion leakage and instability deformation, wherein corrosion failure is the most. The anatomical analysis of the corrosion failure metal corrugated pipe shows that the corrosion failure usually comprises point corrosion perforation and stress corrosion cracking, the stress corrosion cracking accounts for about 80% in the corrosion failure of the whole metal corrugated pipe compensator according to relevant statistics, and according to the on-site disassembly, most corrosion occurs at the connecting part of stainless steel materials and a carbon steel pipe of the metal corrugated pipe.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a connection structure of corrugated metal pipe compensator is provided, this kind of connection structure can change corrugated metal pipe and carbon steel pipe connected mode, stops high corrosive solution and corrodes dissimilar material welding flesh, avoids the corrugated metal pipe compensator to reveal the occurence of failure.
The technical scheme for solving the technical problems is as follows:
a connecting structure of a metal corrugated pipe compensator comprises carbon steel pipes at two ends of the compensator and a stainless steel corrugated pipe in the middle, the improvement is that the end faces of the carbon steel pipes at the two ends of the compensator are respectively and vertically welded with carbon steel pipe annular flanges, the front end of the stainless steel corrugated pipe in the middle of the compensator vertically extends to the center to form an annular connecting end face, the annular connecting end face of the stainless steel corrugated pipe is opposite to the carbon steel pipe annular flanges welded on the end faces of the carbon steel pipes, the inner side of the stainless steel corrugated pipe is respectively provided with an inner side annular flange of the corrugated pipe, the shape of the inner side annular flange of the corrugated pipe is matched with that of the annular flange of the carbon steel pipe, and the carbon steel pipe annular flange, the annular connecting end face and the annular flange on the inner side of the corrugated pipe are respectively provided with a connecting screw hole corresponding to each other, and a connecting bolt penetrates through the connecting screw holes to fixedly connect the carbon steel pipe annular flange, the annular connecting end face and the annular flange on the inner side of the corrugated pipe.
According to the connecting structure of the metal corrugated pipe compensator, sealing materials are respectively placed between the carbon steel pipe annular flange and the annular connecting end face and between the annular connecting end face and the annular flange on the inner side of the corrugated pipe, and the connecting bolts penetrate through the sealing materials to tightly connect the carbon steel pipe annular flange, the annular connecting end face and the annular flange on the inner side of the corrugated pipe.
The utility model has the advantages that:
the utility model discloses a perpendicular welding carbon steel pipe ring flange respectively on the terminal surface of the carbon steel pipe at compensator both ends, the front end of the stainless steel bellows in the middle of the compensator extends perpendicularly to the center and connects the terminal surface for the annular, places the inboard ring flange of bellows respectively in stainless steel bellows both ends inboard, and connecting bolt passes and connects screw and sealing material and connect terminal surface and the inboard ring flange fastening connection of bellows with carbon steel pipe ring flange, annular.
The utility model discloses change the carbon steel pipe of current corrugated metal pipe compensator and stainless steel bellows's welded connection into with flange joint, change the welded seal form into flange joint and seal the material and seal, fundamentally stops the corruption of high corrosive liquid to material hot melt degeneration behind the welding to the life of compensator has been prolonged.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The figures are labeled as follows: the gas compensator comprises a carbon steel pipe 1, a carbon steel pipe annular flange 2, a stainless steel corrugated pipe 3, an annular connecting end face 4, a corrugated pipe inner side annular flange 5, a connecting bolt 6, a sealing material 7 and a gas compensator guide plate 8.
Detailed Description
The utility model discloses constitute by carbon steel pipe 1, carbon steel pipe ring flange 2, nonrust corrugated steel pipe 3, annular connection terminal surface 4, the inboard ring flange of bellows 5, connecting bolt 6, sealing material 7, gas compensator guide plate 8.
The figure shows that carbon steel pipe annular flanges 2 are respectively and vertically welded on the end surfaces of carbon steel pipes 1 at two ends of the compensator, and the welding connection of the carbon steel pipes and the stainless steel corrugated pipes of the existing metal corrugated pipe compensator is changed into flange connection.
The figure shows that the front end of the original stainless steel corrugated pipe 3 in the middle of the compensator vertically extends to the center to form an annular connecting end surface 4, and the annular connecting end surface 4 of the stainless steel corrugated pipe 3 is opposite to the carbon steel pipe annular flange 2 welded on the end surface of the carbon steel pipe 1 and used for flange connection.
The figure shows that the inner side annular flanges 5 of the corrugated pipe are respectively arranged on the inner sides of two ends of the stainless steel corrugated pipe 3, and the shape of the inner side annular flanges 5 of the corrugated pipe is matched with that of the annular flanges 2 of the carbon steel pipe.
The figure shows that the carbon steel pipe annular flange 2, the annular connecting end face 4 and the corrugated pipe inner side annular flange 5 are respectively provided with connecting screw holes corresponding to each other, and the connecting bolt 6 penetrates through the connecting screw holes to tightly connect the carbon steel pipe annular flange 2, the annular connecting end face 4 and the corrugated pipe inner side annular flange 5.
The figure shows that sealing materials 7 are respectively arranged between the carbon steel pipe annular flange 2 and the annular connecting end face 4 and between the annular connecting end face 4 and the annular flange 5 on the inner side of the corrugated pipe, so that good sealing performance is effectively guaranteed. The connecting bolts 6 penetrate through the sealing material 7 to tightly connect the carbon steel pipe annular flange 2, the annular connecting end face 4 and the corrugated pipe inner side annular flange 5.
The figure shows that the backflow device at the inner side of the compensator does not need to be adjusted, and the gas compensator backflow plate 8 and the carbon steel pipe 1 adopt a free state connection mode that one end is welded and the other end is welded at the other end of the carbon steel pipe 1 according to the direction of gas flow, namely, the other end is in a free state.
The utility model discloses a reform transform former compensator nonrust corrugated steel pipe 3 and the welding mode of compensator carbon steel pipe 1, eliminated original xenogenesis material welding back, change organizational structure, easily suffer high corrosion material and corrode, take place the gas leakage condition.
The utility model discloses an embodiment as follows:
the outer diameter of the carbon steel pipe annular flange 2 is 2580mm, and the diameter of an inner hole is 2230 mm;
the inner bore diameter of the annular connection end face 4 is 2210 mm;
the outer diameter of the annular flange 5 on the inner side of the corrugated pipe is 2580mm, and the diameter of an inner hole is 2230 mm;
the diameter of the connecting bolt 6 is 14mm, and the length is 60 mm;
the sealing material 7 is a polytetrafluoroethylene material.
Claims (2)
1. The utility model provides a connection structure of metal bellows compensator, it includes carbon steel pipe (1) and middle stainless steel bellows (3) at compensator both ends, its characterized in that: the end surfaces of the carbon steel pipes (1) at the two ends of the compensator are respectively and vertically welded with carbon steel pipe annular flanges (2), the front end of a stainless steel corrugated pipe (3) in the middle of the compensator vertically extends to the center to form an annular connecting end surface (4), the annular connecting end surface (4) of the stainless steel corrugated pipe (3) is opposite to the carbon steel pipe annular flange (2) welded on the end surface of the carbon steel pipe, the inner side of both ends of the stainless steel corrugated pipe (3) is respectively provided with an inner side annular flange (5) of the corrugated pipe, the shape of the inner side annular flange (5) of the corrugated pipe is matched with that of the annular flange (2) of the carbon steel pipe, connecting screw holes are formed in the carbon steel pipe annular flange (2), the annular connecting end face (4) and the corrugated pipe inner side annular flange (5) respectively and correspond to each other, and connecting bolts (6) penetrate through the connecting screw holes to fixedly connect the carbon steel pipe annular flange (2), the annular connecting end face (4) and the corrugated pipe inner side annular flange (5).
2. The connection structure of the metal bellows compensator according to claim 1, wherein: sealing materials (7) are respectively placed between the carbon steel pipe annular flange (2) and the annular connecting end face (4) and between the annular connecting end face (4) and the corrugated pipe inner side annular flange (5), and the connecting bolts (6) penetrate through the sealing materials (7) to fixedly connect the carbon steel pipe annular flange (2), the annular connecting end face (4) and the corrugated pipe inner side annular flange (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921454425.4U CN210770830U (en) | 2019-09-03 | 2019-09-03 | Connecting structure of metal corrugated pipe compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921454425.4U CN210770830U (en) | 2019-09-03 | 2019-09-03 | Connecting structure of metal corrugated pipe compensator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210770830U true CN210770830U (en) | 2020-06-16 |
Family
ID=71045112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921454425.4U Active CN210770830U (en) | 2019-09-03 | 2019-09-03 | Connecting structure of metal corrugated pipe compensator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210770830U (en) |
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2019
- 2019-09-03 CN CN201921454425.4U patent/CN210770830U/en active Active
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