CN218378073U

CN218378073U - Carbon steel pipe assembly structure with ceramic-lined external plastic coating and alloy pipe welded

Info

Publication number: CN218378073U
Application number: CN202123192607.9U
Authority: CN
Inventors: 刘海波; 郭子钰; 何广东; 贾瓦德
Original assignee: Jiangsu Fengci New Material Technology Co ltd
Current assignee: Jiangsu Fengci New Material Technology Co ltd
Priority date: 2021-12-19
Filing date: 2021-12-19
Publication date: 2023-01-24
Anticipated expiration: 2031-12-19

Abstract

The utility model provides a carbon steel pipe assembly structure of inside lining pottery external application plastics and welding alloy pipe, including a plurality of carbon steel pipeline, it is a plurality of carbon steel pipeline both ends all form carbon steel alloy pipe weld zone with alloy pipe welding, the plastic protection layer has been laid in the carbon steel pipeline outside, the inboard sintering of carbon steel pipeline is provided with the ceramic inner liner, the outstanding ceramic inner liner of terminal surface and the plastic protection layer terminal surface of alloy pipe form the welding heat influence district, adjacent carbon steel pipeline welded fastening forms alloy pipe weld zone between the alloy pipe, the utility model discloses a welding terminal surface of carbon steel alloy pipe weld zone and alloy pipe weld zone all obtains effective protection, avoids inside and outside both sides because with the inside liquid of pipeline or outside gas contact and the corrosion phenomenon that leads to, cost and pipeline assembly degree of difficulty greatly reduced simultaneously, in addition through the inseparable combination of sealed rubber ring with the external screw thread, has realized the encapsulation structure of the imitative waterline in sealed area, has further improved the corrosion resisting property of encapsulation pipeline.

Description

Carbon steel pipe assembly structure with ceramic-lined external plastic coating and alloy pipe welded

Technical Field

The utility model relates to a pipeline connection technical field specifically is a carbon steel pipe assembly structure of inside lining pottery external application plastics and welding alloy pipe.

Background

At present, the pipelines commonly used in the chemical industry comprise carbon steel pipelines (fluorine lining, plastic lining, porcelain lining and the like), stainless steel pipelines, PP pipelines and the like, and the following defects generally exist in the use of the pipelines:

1. although the carbon steel pipeline (fluorine-lined, plastic-lined, porcelain-lined and the like) has a wide application range, the carbon steel pipeline is high in cost, heavy in weight, high in field operation and maintenance cost and not suitable for welding and assembly, welding deformation, welding stress and other welding defects can be generated in the welding process, and the risk of generating cracks or brittle fracture of the structure exists;

2. the stainless steel pipeline is simple to use, but the material cost is higher;

3. the PP plastic pipeline material has low cost, but the use environment is strictly limited.

A connection sealing structure of steel pipe lining plastic pipe with publication number 'CN 2573835' in the prior art belongs to the field of oil pipeline engineering, and mainly comprises a steel pipe and a lining plastic pipe of an oil pipeline, wherein the shape of the end part of a joint of the two sections of butted steel pipes has an expanded diameter, the inner wall of the steel pipe is provided with a sawtooth sealing groove, a tubular inner layer core sleeve is respectively extruded at the inner wall of the plastic pipe, and the outer edge of the lining plastic pipe is embedded into the sawtooth sealing groove on the inner wall of the peripheral steel pipe to be sealed, so that the structure has good sealing performance, high temperature resistance and corrosion resistance, the service life of the steel pipe is prolonged to 20-50 years from 5-10 years at present, the repairing period is short, and the structure is economical and practical.

Although the above-mentioned device and the relevant product among the prior art adopt the compound pipeline form equally, but its mode through inside lining plastic tubing does not solve the outside and weld end face perishable problem of steel pipe, consequently the utility model aims at designing an inside and outside corrosion resistance all obtain showing the inside and outside ceramic lining external application plastics that promote and the welding point obtained effective protection and weld the carbon steel pipe assembly structure of alloy pipe.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a carbon steel pipe assembly structure of inside lining pottery external application plastics and welding alloy pipe to solve the problem that provides in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a carbon steel pipe assembly structure of ceramic-lined external application plastics and welding alloy pipe, includes a plurality of carbon steel pipeline, and is a plurality of carbon steel pipeline both ends all form carbon steel alloy pipe weld zone with the alloy pipe welding, the plastic protection layer has been laid in the carbon steel pipeline outside, the inboard sintering of carbon steel pipeline is provided with the ceramic inner liner, attached in the inside and outside both sides of alloy pipe respectively in the outstanding carbon steel alloy pipe weld zone of ceramic inner liner and plastic protection layer, the outstanding ceramic inner liner of terminal surface and the plastic protection layer terminal surface of alloy pipe form the welding heat influence district, adjacent carbon steel pipeline welded fastening forms alloy pipe weld zone between the alloy pipe.

Preferably, external threads are formed on one side, located in the welding heat affected zone, of each alloy pipe at two ends, an alloy thread packaging ring is sleeved on the external threads of the alloy pipes at one side, and the alloy thread packaging rings are used for covering welding zones of the alloy pipes at two sides.

Preferably, the alloy pipe or the alloy thread packaging ring is a stainless steel pipe.

Preferably, the plastic protective layer is a PP plastic protective layer.

Preferably, sealing rubber ring grooves are further formed in the two sides of the alloy thread packaging ring, and sealing rubber rings are arranged in the sealing rubber ring grooves.

Preferably, both ends of the alloy thread packaging ring are welded and fixed with the alloy pipe.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the welding area of the carbon steel alloy pipe and the welding end surface of the welding area of the alloy pipe are effectively protected, so that the corrosion phenomenon caused by the contact of the inner side and the outer side of the pipe with liquid inside the pipe or external gas is avoided, and the service life of the pipe is effectively prolonged;

2. the utility model adopts the carbon steel pipeline as the main body, the ceramic inner liner is arranged at the inner side, and the joint adopts the mode of welding the alloy pipe, compared with the setting of the PTFE inner liner, the cost is greatly reduced, and the welding position adopts the mode of combining the alloy pipe, thereby effectively avoiding the problems of difficult welding and assembling of the carbon steel pipe, and greatly reducing the assembling difficulty;

3. the utility model discloses a set up the mode of sealed rubber ring in alloy thread encapsulation intra-annular, not only realized the cover to the alloy pipe weld area, still through the inseparable combination of sealed rubber ring and the outside external screw thread of alloy pipe, realized the encapsulation structure of the imitative water line in sealing area, further prevent that outside humid hot gas from getting into the alloy pipe weld area.

The utility model discloses a carbon steel alloy pipe weld area and alloy pipe weld area's welding terminal surface all effectively protects, avoids inside and outside both sides because with the inside liquid of pipeline or the corrosion phenomenon that outside gas contact leads to, cost and pipeline assembly degree of difficulty greatly reduced simultaneously, in addition through the inseparable combination of sealed rubber ring and external screw thread, has realized the encapsulation structure of the imitative water line of sealing area, has further improved the corrosion resisting property of encapsulation pipeline.

Drawings

FIG. 1 is a schematic sectional view of the overall structure of the present invention;

FIG. 2 is an enlarged schematic view of the area A of the present invention;

FIG. 3 is a schematic view of the enlarged structure of the area B of the present invention;

fig. 4 is a schematic view of the overall structure of the present invention.

In the figure: the welding method comprises the following steps of 1 carbon steel pipeline, 2 alloy pipe, 3 sealing rubber ring, 4 carbon steel alloy pipe welding area, 5 plastic protection layer, 6 ceramic lining layer, 7 welding heat affected area, 8 alloy pipe welding area, 9 alloy thread packaging ring and 10 sealing rubber ring groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment is as follows:

referring to fig. 1-4, the present invention provides a technical solution:

the first embodiment is as follows:

the utility model provides a lining pottery external application plastics and welding alloy pipe's carbon steel pipe assembly structure, including a plurality of carbon steel pipelines 1, a plurality of carbon steel pipelines 1 both ends all weld with alloy pipe 2 and form carbon steel alloy pipe weld zone 4, carbon steel pipeline 1 outside is laid and is equipped with plastic protection layer 5, carbon steel pipeline 1 inboard sintering is provided with ceramic inside liner 6, ceramic inside liner 6 and plastic protection layer 5 outstanding carbon steel alloy pipe weld zone 4 attach respectively in the inside and outside both sides of alloy pipe 2, the terminal surface of alloy pipe 2 is outstanding ceramic inside liner 6 and the 5 terminal surfaces of plastic protection layer form welding heat affected zone 7, welding fixed formation alloy pipe weld zone 8 between the alloy pipe 2 of adjacent carbon steel pipeline 1.

In this embodiment, the pipeline body adopts a carbon steel pipeline 1 structure, a plastic protection layer 5 is laid on the outer side of the carbon steel pipeline 1 to protect the outer side of the carbon steel pipeline 1, meanwhile, a ceramic lining layer 6 is arranged on the inner side of the carbon steel pipeline 1 to effectively protect the inner side of the carbon steel pipeline, alloy pipes 2 are welded on two sides of the carbon steel pipeline 1, welding between the alloy pipes 2 on two sides and adjacent alloy pipes 2 is utilized, so that the problems of poor welding assembly and the like of the carbon steel pipeline 1 are effectively avoided, meanwhile, the ceramic carbon steel lining layer 6 and the plastic protection layer 5 protrude out of a welding zone 4 of the alloy pipes, so that welding strips on the inner side and the outer side are protected, the carbon steel alloy pipes 4 are protected from corrosion of the inner environment and the outer environment, the end surfaces of the alloy pipes 2 protrude out of the ceramic lining layer 6 and the end surfaces of the plastic protection layer 5, high temperature can be generated due to welding between pipelines, and the protruding welding heat affected zones 7 are arranged at two ends of the alloy pipes 2, so that thermal damage and damage to the ceramic lining layer 6 and the plastic protection layer 5 can not be generated in the welding process.

Example two:

in this embodiment, the alloy pipes 2 at two ends are both provided with external threads on one side of the welding heat affected zone 7, the external threads of the alloy pipe 2 on one side are sleeved with alloy thread packaging rings 9, the alloy thread packaging rings 9 are used for covering the alloy pipe welding zones 8 on two sides, the alloy pipe welding zones 8 are formed by welding the adjacent alloy pipes 2, after welding is completed, the alloy thread packaging rings 9 on one side are rotated to enable the alloy pipe to cross the alloy pipe welding zones 8 to be in threaded fit with the external threads arranged on the outer side of the alloy pipe 2 on the other side, and at this time, the alloy thread packaging rings 9 effectively protect the alloy pipe welding zones 8 and prevent the alloy pipe from being corroded by the external environment.

Example three:

in this embodiment, the alloy pipe 2 or the alloy thread sealing ring 9 is a stainless steel pipe, preferably a bidirectional stainless steel pipe is used as the alloy pipe 2, and the bidirectional stainless steel pipe has good welding performance, so that the bonding strength and the welding quality between the pipelines are improved.

Example four:

in the embodiment, the plastic protective layer 5 is a PP plastic protective layer, and the PP pipe has the advantages of moderate price, stable performance, heat resistance, heat preservation, high corrosion resistance, long service life and the like.

Example five:

in this embodiment, sealing rubber ring grooves 10 are further formed in the two sides of the alloy threaded packaging ring 9, sealing rubber rings 3 are arranged in the sealing rubber ring grooves 10 and abut against the outside of the alloy pipe 2 through the sealing rubber rings 3, so that the alloy pipe welding area 8 is further isolated from the external environment, and in the rotation process of the alloy threaded packaging ring 9, the sealing rubber rings 3 can be matched with external threads arranged on the outer side of the alloy pipe 2, so that a water-wave-like packaging structure is formed, and the sealing performance is fully guaranteed.

Example six:

in the embodiment, two ends of the alloy thread packaging ring 9 are welded and fixed with the alloy pipe 2, and when the alloy thread packaging ring 9 rotates to the outer side of the alloy pipe welding area 8, the alloy thread packaging ring 9 is further fixed with the alloy pipe 2 in a welding mode, so that the alloy thread packaging ring 9 is not displaced, and the sealing effect is ensured.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a carbon steel pipe assembly structure of ceramic-lined external application plastics and welding alloy pipe, includes a plurality of carbon steel pipelines (1), its characterized in that: the carbon steel pipeline welding method is characterized in that two ends of the carbon steel pipeline (1) are welded with alloy pipes (2) to form a carbon steel alloy pipe welding area (4), plastic protection layers (5) are laid on the outer sides of the carbon steel pipeline (1), ceramic lining layers (6) are arranged on the inner sides of the carbon steel pipeline (1) in a sintering mode, the ceramic lining layers (6) and the plastic protection layers (5) protrude out of the carbon steel alloy pipe welding area (4) and are attached to the inner side and the outer side of the alloy pipes (2) respectively, the end faces of the alloy pipes (2) protrude out of the ceramic lining layers (6) and the end faces of the plastic protection layers (5) to form a welding heat affected area (7), and the alloy pipes (2) of adjacent carbon steel pipelines (1) are fixedly welded to form an alloy pipe welding area (8).

2. The carbon steel tube assembly structure lined with ceramic and externally coated with plastic and welded with an alloy tube as claimed in claim 1, wherein: the alloy pipe welding structure is characterized in that external threads are formed in one side, located in a welding heat affected zone (7), of each alloy pipe (2) at two ends, an alloy thread packaging ring (9) is sleeved on the external threads of the alloy pipe (2) at one side, and the alloy thread packaging rings (9) are used for covering alloy pipe welding zones (8) at two sides.

3. The carbon steel tube assembly structure lined with ceramic and coated with plastic and welded with an alloy tube as claimed in claim 1 or 2, wherein: the alloy pipe (2) or the alloy thread packaging ring (9) is a stainless steel pipe.

4. The assembly structure of the carbon steel tube lined with the ceramic and coated with the plastic and welded with the alloy tube as claimed in claim 3, wherein: the plastic protective layer (5) is a PP plastic protective layer.

5. The assembly structure of the carbon steel tube lined with the ceramic and coated with the plastic and welded with the alloy tube as claimed in claim 3, wherein: sealing rubber ring grooves (10) are further formed in the two sides of the alloy thread packaging ring (9), and sealing rubber rings (3) are arranged in the sealing rubber ring grooves (10).

6. The assembly structure of the carbon steel pipe lined with the ceramic and externally coated with the plastic and welded with the alloy pipe as claimed in claim 3, wherein: and two ends of the alloy thread packaging ring (9) are welded and fixed with the alloy pipe (2).