CN211925046U - Pipe system - Google Patents

Pipe system Download PDF

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Publication number
CN211925046U
CN211925046U CN201922278140.6U CN201922278140U CN211925046U CN 211925046 U CN211925046 U CN 211925046U CN 201922278140 U CN201922278140 U CN 201922278140U CN 211925046 U CN211925046 U CN 211925046U
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Prior art keywords
corrosion
pipeline
pipe
component
flange
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CN201922278140.6U
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Chinese (zh)
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刘海波
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Huageng New Material Technology Jiaxing Co ltd
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Huageng New Material Technology Jiaxing Co ltd
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Abstract

The utility model provides a pipeline system, which comprises a first pipeline and a second pipeline, wherein the first pipeline is provided with a first end part, the second pipeline is provided with a second end part, a first anti-corrosion component is welded on the end surface of the first end part, and the inner surface of the first pipeline is lined with a first anti-corrosion layer; a second anti-corrosion component is welded on the end face of the second end part, and a second anti-corrosion layer is lined on the inner surface of the second pipeline; the first end of the first conduit and the second end of the second conduit are directly or indirectly connected. The utility model provides a pipe-line system can realize the anticorrosive of the junction of the pipeline of inside lining anticorrosive coating.

Description

Pipe system
Technical Field
The utility model relates to a pipe-line system, in particular to pipe-line system of inside lining anticorrosive coating.
Background
The anti-corrosion steel pipe is a steel pipe which is processed by an anti-corrosion process and can effectively prevent or slow down the corrosion phenomenon caused by chemical or electrochemical reaction in the transportation and use processes. According to the statistical data of China, the direct economic loss of steel pipe corrosion in China is 2800 billion each year. Currently, the global annual loss of steel pipe corrosion is as high as $ 5000 billion. The anti-corrosion steel pipe can effectively prevent or slow down corrosion, prolong the service life of the steel pipe and reduce the operation cost of the steel pipe.
The lining of steel pipe with anticorrosive layer is a widely used technology, especially suitable for chemical and petroleum industry. At present, most of lining anticorrosive materials are high molecular materials, and a small amount of lining inorganic non-metallic materials such as ceramics or glass are reported. One of the major problems faced if lining the inside surface of steel pipes with ceramic or glass is the corrosion protection of the pipe end joints. According to the current process, the main drawbacks of lining the end of the pipe with a ceramic or glass layer are: the ceramic or glass layer is too thin and is prone to cracking during welding or stress, resulting in failure of the corrosion resistant layer. The defects are particularly prominent at the transition between the inner surface of the pipe and the end face of the pipe. The corrosion-resistant alloy pipe is welded on the end of the pipeline, and the corrosion-resistant alloy pipes of the two pipelines are welded together or connected together by connecting pieces such as flanges and the like during construction. The disadvantage of this approach is that the corrosion resistant alloy is particularly expensive and too costly.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defects of the prior art, the utility model provides a pipeline system, the technical problem that solve is the anticorrosive of the junction of the pipeline of inside lining anticorrosive coating.
In order to solve the above problem, the utility model discloses the technical scheme who takes is: a pipeline system comprises a first pipeline and a second pipeline, wherein the first pipeline is provided with a first end part, the second pipeline is provided with a second end part, a first anti-corrosion component is welded on the end face of the first end part, the first anti-corrosion component extends towards the inside of the first pipeline and exceeds the inner surface of the first end part, the inner surface of the first pipeline is lined with a first anti-corrosion layer, and the first anti-corrosion layer extends along the inner surface of the first pipeline and is tightly attached to the first anti-corrosion component; a second anti-corrosion component is welded on the end face of the second end portion, extends towards the inside of the second pipeline and exceeds the inner surface of the second end portion, a second anti-corrosion layer is lined on the inner surface of the second pipeline, and extends along the inner surface of the second pipeline and is tightly attached to the second anti-corrosion component; the first end of the first conduit and the second end of the second conduit are directly or indirectly connected.
Preferably, the first corrosion prevention part has an outer diameter not greater than that of the first pipe, and the second corrosion prevention part has an outer diameter not greater than that of the second pipe.
Preferably, the first end of the first pipe and the second end of the second pipe are connected by a connecting means, the connecting means comprising a flange.
Preferably, a first clamping structure is arranged on the outer surface of the first end of the first pipeline, a second clamping structure is arranged on the outer surface of the second end of the second pipeline, and the flange is matched with the first clamping structure and the second clamping structure to realize the connection of the first end and the second end.
Preferably, the first engaging structure includes a first engaging groove, and the second engaging structure includes a second engaging groove.
Preferably, the connecting device further comprises a first clamping component embedded in the first card slot, and a second clamping component embedded in the second card slot; the first portion of the flange is connected to the first engaging member, and the second portion of the flange is connected to the second engaging member.
Preferably, the pipe system further includes a first hot-melt anticorrosive sealing layer and a second hot-melt anticorrosive sealing layer, the first hot-melt anticorrosive sealing layer is combined to the end surface of the first anticorrosive component, and the second hot-melt anticorrosive sealing layer is combined to the end surface of the second anticorrosive component.
Preferably, the pipeline system further comprises an intermediate anti-corrosion sealing layer, and the intermediate anti-corrosion sealing layer is positioned between the first hot-melt anti-corrosion sealing layer and the second hot-melt anti-corrosion sealing layer.
The utility model has the advantages that: the utility model provides a pipe end's of pipeline corrosion resisting property is good, and installation construction is convenient, and is with low costs.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
Drawings
Fig. 1 is a schematic diagram of a first preferred embodiment of the piping system provided by the present invention.
Fig. 2 is a schematic diagram of a second preferred embodiment of the pipe system provided by the present invention.
Fig. 3 is a schematic diagram of a third preferred embodiment of the piping system provided by the present invention.
Detailed Description
Fig. 1 shows a first preferred embodiment of the pipe system provided by the present invention.
As shown in fig. 1, the base body of the pipe in this embodiment is a steel pipe, and includes a first pipe 110 and a second pipe 120. The first corrosion prevention part 120 is welded to an end surface of the first pipe 110, and the first corrosion prevention part 120 extends toward the inside of the first pipe 110 beyond the inner surface of the first pipe 110 to form a step with the inner surface of the first pipe 110. The inner surface of the first pipe 110 is lined with a first corrosion protection layer 130, and the first corrosion protection layer 130 extends along the inner surface of the first pipe 110 and is in close contact with the portion of the inner surface of the first corrosion protection part 120 extending beyond the end portion. A second corrosion prevention part 220 is welded to an end surface of the second pipe 210, and the second corrosion prevention part 220 extends toward the inside of the second pipe 210 beyond the inner surface of the second pipe 210 to form a step with the inner surface of the second pipe 210. The inner surface of the second pipe 210 is lined with a second corrosion protection layer 230, and the second corrosion protection layer 230 extends along the inner surface of the second pipe 210 and is in close contact with the portion of the inner surface of the second corrosion protection member 220 extending beyond the end portion.
The above-described steel pipe base body, anticorrosive member, and anticorrosive coating constitute a basic anticorrosive structure of the end portion of the pipe in this embodiment. Because the anticorrosive coating is closely attached to the anticorrosive component, the whole inner surface from the steel pipe substrate to the anticorrosive component is anticorrosive.
In terms of manufacturing process, a preferred embodiment is: firstly, the anti-corrosion component is welded to the end face of the steel pipe, and then the anti-corrosion layer is lined on the inner surface of the steel pipe and is tightly attached to the anti-corrosion component. The material of the corrosion protection layer may vary from application to application, and the lining process may vary accordingly. For example, for a plastic-lined steel pipe, powder plastic can be sprayed on the inner surface of the steel pipe, and then the plastic is tightly attached to the inner surface of the steel pipe and an anticorrosive component by a hot melting method; for the steel pipe lined with ceramic or glass, ceramic powder or glass powder can be sprayed or coated on the inner surface of the steel pipe, and then the ceramic or glass is tightly attached to the inner surface of the steel pipe and the anti-corrosion part by a sintering method.
The material of the corrosion-resistant component can be corrosion-resistant alloy, such as corrosion-resistant stainless steel or nickel-based corrosion-resistant alloy. The corrosion-resistant alloy is selected, so that the steel pipe can be connected with the corrosion-resistant alloy in a welding mode. The corrosion resistant alloy can be selected as required by those skilled in the art for different applications, and will not be described in detail herein.
In this embodiment, the corrosion prevention component can be regarded as a section of pipeline as a whole, and the outer diameter of the corrosion prevention component is substantially the same as that of the steel pipe (the outer diameter of the corrosion prevention component can also be set to be not larger than that of the steel pipe), so that after the corrosion prevention component is welded to the steel pipe, the pipeline is a continuous complete pipeline as seen from the outer surface of the steel pipe, and the arrangement has the advantage of facilitating further processing (for example, lining a corrosion prevention layer) and transportation of the pipeline. The inner diameter of the corrosion prevention part is smaller than that of the steel pipe, so that a step is formed between the corrosion prevention part and the steel pipe. The length of the corrosion-resistant member can be shortened as much as possible to save the use cost of the expensive corrosion-resistant alloy. It should be noted that, according to the principle provided by the specific embodiment, a person skilled in the art may modify the corrosion prevention member in various ways, for example, the corrosion prevention member does not necessarily form a distinct step with the inner surface of the steel pipe, and only the corrosion prevention member needs to extend into the steel pipe beyond the inner surface of the steel pipe.
Figure 1 also shows the structure required for the pipe connections provided by the above embodiments.
As shown in fig. 1, the pipe provided by this embodiment may be connected using a flange, which includes a first portion 140 and a second portion 240. When connecting, the two pipes can be directly welded to the ends of the two pipes by flanges, and then connected by connecting members (for example, bolts) through the through holes of the flanges. It should be noted that the use of such a joint is not suitable for some applications, for example, when the steel pipe is lined with glass and the thickness of the glass layer (corrosion-resistant layer) is small, the welding may easily cause the glass layer of the lining to crack, thereby causing the corrosion-resistant layer to fail. In this case, a more preferable connection mode is that the two pipes are connected by using the snap structure and the flange, so that a high-temperature environment caused by direct welding of the flange and the pipes is avoided.
As shown in fig. 1, a first engaging groove 111 is formed on an outer surface of an end portion of the first pipe, and a first engaging member 150 is provided to match with the first engaging groove 111, where the first engaging member 150 may be a plurality of strip-shaped, block-shaped, semi-annular, arc-shaped, or other shaped members as long as it can be inserted into the first engaging groove 111 during construction. For a particular shape of the first engaging member 150, the first engaging groove 111 may also be a matching shape, for example, the first engaging groove 111 may be a continuous groove around the outer surface of the pipe or may be a plurality of independent recesses. The outer surface of the end of the second pipe is provided with a second locking groove 211, and a second locking part 250 matched with the second locking groove 211 is additionally provided. During construction, the plurality of first clamping components 150 are embedded into the first clamping grooves 111, the plurality of second clamping components 250 are embedded into the second clamping grooves 211, then the first clamping components 150 are welded with the first part 140 of the flange, and the second clamping components 250 are welded with the second part 240 of the flange, or other connection modes, such as connection of connecting pieces, can be adopted; and finally, connecting the two pipelines through the flange.
The construction process for connecting the two pipelines is as follows:
(1) the outer surface of the first end part of a first pipeline in the two pipelines is provided with a first clamping groove, and the outer surface of the second end part of a second pipeline is provided with a second clamping groove;
(2) providing a first clamping part matched with the first clamping groove and providing a second clamping part matched with the second clamping groove; embedding a first clamping part into the first clamping groove and embedding a second clamping part into the second clamping groove;
(3) connecting a first part of the flange with the first clamping component, and connecting a second part of the flange with the second clamping component; connecting the first and second portions of the flange to thereby effect connection of the first and second ends.
It is noted that a preferred embodiment of the structural arrangement and construction method for connecting two pipes by means of a snap-fit structure has been described in detail above. Those skilled in the art can use the principle provided by this embodiment to realize the connection of two pipes by using other clamping structures, for example, the protruding structure of the outer surface of the pipe and the matching of the flange, which will not be described in detail herein.
In order to achieve a better sealing effect at the connection of the two pipes, in this embodiment a sealing member is also provided.
As shown in fig. 1, the sealing member includes a first heat-fusible anticorrosive sealing layer 160, a second heat-fusible anticorrosive sealing layer 260, and an intermediate anticorrosive sealing layer 70. The common characteristic of the two layers of sealing parts is that the sealing parts have a sealing function and are made of anticorrosive materials, so the sealing parts are called anticorrosive sealing layers. The hot-melt anti-corrosion sealing layer is different from the intermediate anti-corrosion sealing layer in that: the hot-melting anticorrosion sealing layer is made of a hot-melting anticorrosion material, and the compressible anticorrosion sealing layer is made of an anticorrosion material. When two pipelines are connected, the end faces of the two pipelines are combined with hot-melting anticorrosive sealing layers, and then the middle anticorrosive sealing layer is arranged at the joint of the two pipelines as a gasket.
The material for manufacturing the hot-melt anti-corrosion sealing layer can be high molecular material, such as PFA material or polytetrafluoroethylene material, and the hot-melt anti-corrosion material has the advantage that the hot-melt anti-corrosion sealing layer can be combined with the end face of the pipeline in a hot-melt mode. The material for making the compressible anticorrosion sealing layer can be graphite, expanded graphite, high polymer anticorrosion material or other suitable materials.
In this embodiment, when the flange is used in combination with one of the benefits of the sealing member, the size of the sealing member can be far larger than the outer diameter of the pipeline, so that the thickness of the anti-corrosion sealing layer in the radial direction of the pipeline is increased, and the anti-corrosion sealing performance of the pipeline joint is greatly improved.
Fig. 2 shows a second preferred embodiment of the pipe system provided by the present invention.
As shown in fig. 2, the pipe of this embodiment also includes a first pipe 110, a first corrosion prevention part 120 is welded to an end surface of the first pipe 110, and the first corrosion prevention part 120 extends to the inside of the first pipe 110 beyond the inner surface of the first pipe 110 to form a step with the inner surface of the first pipe 110, as in the first preferred embodiment. The inner surface of the first pipe 110 is lined with a first corrosion protection layer 130, and the first corrosion protection layer 130 extends along the inner surface of the first pipe 110 and is in close contact with the portion of the inner surface of the first corrosion protection part 120 extending beyond the end portion. Also, the outer surface of the end of the first pipe 110 is also provided with a first catching groove 111. The second duct adopts a similar structure to the first duct.
In contrast to the first preferred embodiment, the pipes in this embodiment are connected by means of clamps. During construction, the clamp can be directly sleeved on the clamping grooves at the end parts of the two pipelines and then connected. Similarly, in order to realize better sealing effect of the joint of the two pipelines, the end face of each pipeline is combined with a hot-melting anti-corrosion sealing layer, and an intermediate anti-corrosion sealing layer is arranged between the two pipelines.
Fig. 3 shows a third preferred embodiment of the pipe system provided by the present invention.
As shown in fig. 3, in the same manner as in the second preferred embodiment, a first corrosion prevention part 120 is welded to an end surface of the first pipe 110, and the first corrosion prevention part 120 extends toward the inside of the first pipe 110 beyond the inner surface of the first pipe 110 to form a step with the inner surface of the first pipe 110. The inner surface of the first pipe 110 is lined with a first corrosion protection layer 130, and the first corrosion protection layer 130 extends along the inner surface of the first pipe 110 and is in close contact with the portion of the inner surface of the first corrosion protection part 120 extending beyond the end portion.
In contrast to the second preferred embodiment, the pipes in this embodiment are connected by means of a thread. Thus, the outer surface of the end of the pipe is not provided with a catching groove, but with a first external thread 112. The second duct adopts a similar structure to the first duct. During construction, another connecting pipe with internal threads needs to be provided, and the two pipelines are respectively connected with the connecting pipe in a threaded connection mode. Similarly, in order to realize better sealing effect at the joint of the two pipelines, the end face of each pipeline is combined with a hot-melting anti-corrosion sealing layer, and an intermediate anti-corrosion sealing layer is arranged between the two pipelines.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims (8)

1. A pipeline system comprises a first pipeline and a second pipeline, wherein the first pipeline is provided with a first end part, the second pipeline is provided with a second end part, and the pipeline system is characterized in that a first anticorrosion part is welded on the end face of the first end part, extends towards the inside of the first pipeline and exceeds the inner surface of the first end part, a first anticorrosion layer is lined on the inner surface of the first pipeline, extends along the inner surface of the first pipeline and is tightly attached to the first anticorrosion part; a second anti-corrosion component is welded on the end face of the second end portion, extends towards the inside of the second pipeline and exceeds the inner surface of the second end portion, a second anti-corrosion layer is lined on the inner surface of the second pipeline, and extends along the inner surface of the second pipeline and is tightly attached to the second anti-corrosion component; the first end of the first conduit and the second end of the second conduit are directly or indirectly connected.
2. The piping system of claim 1, wherein the first corrosion protection component has an outer diameter no greater than an outer diameter of the first pipe and the second corrosion protection component has an outer diameter no greater than an outer diameter of the second pipe.
3. The piping system of claim 1, wherein the first end of the first pipe and the second end of the second pipe are connected by a connecting device, the connecting device comprising a flange.
4. A ducting system as claimed in claim 3 wherein the first end of the first duct is provided with a first snap-fit formation on an outer surface thereof and the second end of the second duct is provided with a second snap-fit formation on an outer surface thereof, the connection of the first and second ends being effected by engagement of the flange with the first and second snap-fit formations.
5. The conduit system of claim 4, wherein the first engagement structure comprises a first catch and the second engagement structure comprises a second catch.
6. The conduit system of claim 5, wherein the coupling device further comprises a first snap-fit component that fits into the first card slot, and a second snap-fit component that fits into the second card slot; the first portion of the flange is connected to the first engaging member, and the second portion of the flange is connected to the second engaging member.
7. A ductwork system according to claim 1, further comprising a first heat fusible anti-corrosion seal layer bonded to an end surface of the first anti-corrosion component, a second heat fusible anti-corrosion seal layer bonded to an end surface of the second anti-corrosion component.
8. A ducting system as claimed in claim 7 wherein the ducting system further comprises an intermediate corrosion resistant seal layer intermediate the first and second heat fusible corrosion resistant seal layers.
CN201922278140.6U 2019-12-19 2019-12-19 Pipe system Active CN211925046U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922278140.6U CN211925046U (en) 2019-12-19 2019-12-19 Pipe system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922278140.6U CN211925046U (en) 2019-12-19 2019-12-19 Pipe system

Publications (1)

Publication Number Publication Date
CN211925046U true CN211925046U (en) 2020-11-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201922278140.6U Active CN211925046U (en) 2019-12-19 2019-12-19 Pipe system

Country Status (1)

Country Link
CN (1) CN211925046U (en)

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