CN213333098U - Pipeline and pipeline system - Google Patents

Abstract

The utility model provides a pipeline and pipe-line system, the pipeline include metal base member and inside lining in the anticorrosive coating of metal base member's internal surface, the anticorrosive coating includes anticorrosive coating intermediate part, anticorrosive coating first end and anticorrosive coating second end, anticorrosive coating first end has anticorrosive coating first end face, the thickness of anticorrosive coating first end face is greater than the thickness of anticorrosive coating intermediate part. The utility model provides a pipeline and pipe-line system can realize being the anticorrosive of the junction of the pipeline of inside lining anticorrosive coating.

Description

Pipeline and pipeline system

Technical Field

The utility model relates to a pipeline, in particular to pipeline of inside lining anticorrosive coating. The utility model discloses still relate to pipe-line system.

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, 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: the utility model provides a pipeline, include metal base and inside lining in the anticorrosive coating of metal base's internal surface, the anticorrosive coating includes anticorrosive coating intermediate part, anticorrosive coating first end and anticorrosive coating second end, anticorrosive coating first end has anticorrosive coating first terminal surface, the thickness of anticorrosive coating first terminal surface is greater than the thickness of anticorrosive coating intermediate part.

Preferably, the metal matrix comprises a metal matrix middle part, a metal matrix first end part and a metal matrix second end part, wherein the metal matrix first end part is provided with a metal matrix first end face, and the thickness of the metal matrix first end face is smaller than that of the metal matrix middle part.

Preferably, the sum of the average thicknesses of the middle part of the anticorrosion layer and the middle part of the metal matrix is D0, and the sum of the thicknesses of the first end surface of the anticorrosion layer and the first end surface of the metal matrix is D1, wherein 0.9X D0 is not less than D1 is not less than 1.1X D0.

Preferably, the inner surface of the first end of the metal matrix comprises a slope or a curve, and/or the inner surface of the first end of the corrosion protection layer comprises a slope or a curve.

Preferably, the thickness of the first end face of the anticorrosive layer is 0.8mm or more, or 1mm or more, or 1.2mm or more, or 1.5mm or more, or 2mm or more.

Preferably, the material of the anticorrosive layer is a high molecular organic material or an inorganic non-metallic material.

The utility model also provides a pipeline system, including the pipeline that two at least fundamental utility model provided, be first pipeline and second pipeline respectively, pipeline system still includes middle anticorrosive sealing layer, middle anticorrosive sealing layer is located the centre of first pipeline and second pipeline.

Preferably, the pipe system further comprises a first bonding anticorrosion sealing layer and a second bonding anticorrosion sealing layer, wherein the first bonding anticorrosion sealing layer is combined with the first end surface of the anticorrosion layer of the first pipe, the second bonding anticorrosion sealing layer is combined with the first end surface of the anticorrosion layer of the second pipe, and the middle anticorrosion sealing layer is positioned between the first bonding anticorrosion sealing layer and the second bonding anticorrosion sealing layer.

Preferably, the pipe system further comprises a connecting device for connecting the first pipe and the second pipe, the connecting device comprising a flange.

Preferably, the flange connects the first and second pipes by one or more of the following three ways:

1) the outer surface of the first pipeline is provided with a first clamping structure, the outer surface of the second pipeline is provided with a second clamping structure, and the first pipeline is connected with the second pipeline through the matching of the flange and the first clamping structure;

2) the flange is connected with the first pipeline and the second pipeline through threads, so that the first pipeline and the second pipeline are connected;

3) the flange is connected with the first pipeline and the second pipeline through fixing pieces, so that the first pipeline and the second pipeline are connected.

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 structural diagram of a first preferred embodiment of the pipeline provided by the present invention.

Fig. 2 is a schematic view of the structure of the metal matrix and corrosion protection layer of the pipe shown in fig. 1.

Fig. 3 is a schematic view of a connection structure of the pipes shown in fig. 1.

Fig. 4 is a schematic structural diagram of a second preferred embodiment of the pipeline provided by the present invention.

Fig. 5 is a schematic structural diagram of a third preferred embodiment of the pipeline provided by the present invention.

Fig. 6 is a schematic structural diagram of a fourth preferred embodiment of the pipeline provided by the present invention.

Fig. 7 is a schematic structural diagram of a fifth preferred embodiment of the pipeline provided by the present invention.

Detailed Description

Fig. 1 and 2 show a first preferred embodiment of the pipe provided by the present invention.

As shown in fig. 1 and 2, the pipe in this embodiment includes a metal base 100, specifically, a steel pipe, an inner surface of the metal base 100 is lined with a corrosion prevention layer 200, and the corrosion prevention layer 200 extends along the inner surface of the metal base 100. The metal matrix 100 includes a metal matrix middle portion 110, a metal matrix first end portion 120, and a metal matrix second end portion 130, wherein the metal matrix first end portion 120 has a metal matrix first end surface 121, and the metal matrix second end portion 130 has a metal matrix second end surface 131. The anticorrosive layer 200 includes an anticorrosive layer middle portion 210, an anticorrosive layer first end portion 220, and an anticorrosive layer second end portion 230, the anticorrosive layer first end portion 220 having an anticorrosive layer first end surface 221, and the anticorrosive layer second end portion 230 having an anticorrosive layer second end surface 231.

In this embodiment, the division of the metal base body and the intermediate and end portions of the corrosion protection layer is based on the thickness. As shown in fig. 2, the metal base gradually decreases in thickness as it transitions from the middle portion to the end portion (the inner surface of the end portion is a slope); the thickness of the corrosion protection layer gradually increases when the corrosion protection layer transits from the middle part to the end part. The overall thickness of the metal substrate and the anti-corrosion layer is uniform in view of the sum of the thicknesses of the metal substrate and the anti-corrosion layer, and of course, certain errors may be tolerated, for example, the sum of the average thicknesses of the middle portion of the anti-corrosion layer and the middle portion of the metal substrate is D0, and the sum of the thicknesses of the end portions of the anti-corrosion layer and the end portions of the metal substrate is D1, wherein 0.9D 0 ≦ D1 ≦ 1.1 × D0.

The utility model discloses a key lies in the thickness of the terminal surface of increase anticorrosive coating as far as possible to strengthen the corrosion resisting property of pipe connection department. As shown in fig. 2, the corrosion protection layer first end surface 221 and the corrosion protection layer second end surface 231 are thickest throughout the corrosion protection layer 200, and accordingly, the metal base first end surface 121 and the metal base second end surface 131 are thinnest throughout the metal base 100. The thickness of the first end surface 221 of the anticorrosive layer may be 0.8mm or more, or 1mm or more, or 1.2mm or more, or 1.5mm or more, or 2mm or more, as required. In addition, the first end surface 221 and the second end surface 231 of the corrosion protection layer, the first end surface 121 of the metal substrate and the second end surface 131 of the metal substrate are substantially planar, the first end surface 221 of the corrosion protection layer and the first end surface 121 of the metal substrate are in the same plane and are tightly connected, and the second end surface 231 of the corrosion protection layer and the second end surface 131 of the metal substrate are in the same plane and are tightly connected, so that the purpose of the arrangement is also to enhance the corrosion protection performance of the pipeline connection part.

The above describes a preferred embodiment of the pipe provided by the present invention, in which both ends of the pipe have a similar structure. As a modification of this embodiment, it is also possible to provide a duct having one end with the above-described structure and the other end with a different structure.

In terms of manufacturing process, a preferred embodiment is: providing a common steel pipe, processing two ends of the steel pipe to form the inclined plane structure, then providing a baffle plate, clinging to two end faces of the steel pipe, finally lining an anticorrosive coating and removing the baffle plate, and forming the structure at two ends of the anticorrosive coating. 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 lined on the inner surface of the steel pipe by a hot melting method; for the steel pipe lined with ceramic or glass, ceramic powder or glass powder may be sprayed or coated on the inner surface of the steel pipe, and then ceramic or glass may be lined on the inner surface of the steel pipe by a sintering method.

Fig. 1 and 3 also show the structure required for the pipe connection provided by the above-described embodiments.

As shown in fig. 1 and 3, the pipe provided by this embodiment may be connected using a flange 40. When connecting, the flanges 40 can be directly welded to the ends of the two pipes, and then the pipes can be connected by connecting members (e.g., bolts) through the through holes 41 of the flanges 40. 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 and 3, a clamping groove 101 is provided on the outer surface of the end of the pipe, and a clamping member 50 matching with the clamping groove 101 is provided, and the clamping member 50 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 clamping groove 101 during the construction. The detent 101 may also take a matching shape for a particular shaped snap member 50, for example, the detent 101 may be a continuous groove around the outer surface of the tubing or may be a plurality of individual dimples. During construction, the plurality of clamping components 50 are embedded into the clamping grooves 101, and then the clamping components 50 are welded with the flange 40, or other connection modes can be adopted, such as connection of connecting pieces; finally, the two pipes are connected by a flange 40.

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.

As a variation of this embodiment, the flange is also connected to the first pipe and the second pipe by means of a thread, so as to enable the connection of the first end of the first pipe and the first end of the second pipe; the flange can also be connected with the first pipeline and the second pipeline through fixing pieces, so that the first end of the first pipeline is connected with the first end of the second pipeline. Other suitable connections may be used by those skilled in the art in accordance with the principles provided in this particular embodiment and 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 and 3, the sealing member includes an adhesive corrosion prevention sealing layer 60 and an intermediate corrosion prevention 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 adhesive corrosion protective sealant 60 and the intermediate corrosion protective sealant 70 are different in that: the adhesive corrosion-resistant sealing layer 60 is made of a material having adhesive properties, and the intermediate corrosion-resistant sealing layer 70 is made of a corrosion-resistant material. When the two pipelines are connected, the end faces of the two pipelines are combined with the bonding anticorrosion sealing layer 60, and then the middle anticorrosion sealing layer 70 is arranged at the joint of the two pipelines as a gasket.

The material for making the adhesion anticorrosion sealing layer 60 can be selected from high molecular materials, such as PFA materials or teflon materials, or can be hot-melt anticorrosion materials, and the hot-melt anticorrosion materials have the advantage that the adhesion anticorrosion sealing layer 60 can be combined with the end face of the pipeline in a hot-melt mode. The intermediate corrosion-resistant sealing layer 70 may be made of graphite, expanded graphite, polymer corrosion-resistant material or other suitable materials.

Fig. 4 shows a second preferred embodiment of the end of the pipe as provided by the present invention.

As shown in fig. 4, the pipe of this embodiment also includes a metal base 100, specifically a steel pipe, the inner surface of the metal base 100 is lined with a corrosion protection layer 200, and the corrosion protection layer 200 extends along the inner surface of the metal base 100, as in the first preferred embodiment. Wherein the metal matrix 100 comprises a metal matrix middle portion 110, a metal matrix first end portion 120, and a metal matrix second end portion 130; the anticorrosive layer 200 includes an anticorrosive layer middle portion 210, an anticorrosive layer first end portion 220, and an anticorrosive layer second end portion 230, the anticorrosive layer first end portion 220 having an anticorrosive layer first end surface 221, and the anticorrosive layer second end portion 230 having an anticorrosive layer second end surface 231. The manufacturing process of the pipe is also similar to that of the first embodiment. Likewise, the pipes in this embodiment are connected by means of flanges. The arrangement of the connecting structure and the flange is similar to that of the first embodiment. Similarly, in order to realize better sealing effect at the joint of the two pipelines, the end face of each pipeline is combined with an adhesive anticorrosion sealing layer, and a middle anticorrosion sealing layer is arranged between the two pipelines.

Unlike the first preferred embodiment, the inner surfaces of the metal matrix first end 120 and the metal matrix second end 130 of the tube in this embodiment are curved. Accordingly, the respective faces of the corrosion protection layer first end 220 and the corrosion protection layer second end 230 are also mating curved surfaces.

Fig. 5 shows a third preferred embodiment of the end of a pipe as provided by the present invention.

As shown in fig. 5, the pipe in this embodiment also includes a metal base 100, specifically a steel pipe, and the inner surface of the metal base 100 is lined with a corrosion protection layer 200, and the corrosion protection layer 200 extends along the inner surface of the metal base 100, as in the second preferred embodiment. Wherein the metal matrix 100 comprises a metal matrix middle portion 110, a metal matrix first end portion 120, and a metal matrix second end portion 130; the anticorrosive layer 200 includes an anticorrosive layer middle portion 210, an anticorrosive layer first end portion 220, and an anticorrosive layer second end portion 230, the anticorrosive layer first end portion 220 having an anticorrosive layer first end surface 221, and the anticorrosive layer second end portion 230 having an anticorrosive layer second end surface 231. The manufacturing process of the pipe is also similar to that of the first embodiment. Likewise, the pipes in this embodiment are connected by means of flanges. The arrangement of the connecting structure and the flange is similar to that of the first embodiment. Similarly, in order to realize better sealing effect at the joint of the two pipelines, the end face of each pipeline is combined with an adhesive anticorrosion sealing layer, and a middle anticorrosion sealing layer is arranged between the two pipelines. In addition, the inner surfaces of the first metal base end 120 and the second metal base end 130 of the pipe in this embodiment are also curved.

Unlike the second preferred embodiment, the inner surfaces of the anticorrosive layer first end 220 and the anticorrosive layer second end 230 of the anticorrosive layer 200 include a curved surface (or a slope). Such a cambered (or beveled) structure may be formed in some cases by the erosion protection layer first end 220 and the erosion protection layer second end 230 of the erosion protection layer 200 during lining of the erosion protection layer 200. It should be noted that even though the inner surfaces of the first and second end portions 220 and 230 of the anticorrosion layer 200 include a cambered surface (or a slant surface), the thicknesses of the first and second end surfaces 221 and 231 of the anticorrosion layer are still greater than the thickness of the middle portion 210 of the anticorrosion layer.

Fig. 6 shows a fourth embodiment of the connection of the pipes provided by the present invention.

As shown in fig. 6, the same as the first embodiment, the pipe provided by this embodiment is also connected using a flange 40. In contrast to the first embodiment, the flange is connected to the pipe by means of a thread. The corrosion protection seal layer includes only the intermediate corrosion protection seal layer 70.

Fig. 7 shows a fifth embodiment of the connection of the pipes provided by the present invention.

As shown in fig. 7, the same as the first embodiment, the pipe provided by this embodiment is also connected using a flange 40. Unlike the first more specific embodiment, the flange is connected to the pipe by fasteners 80 (e.g., rivets). The corrosion protection seal layer includes only the intermediate corrosion protection seal layer 70.

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 (10)

1. The utility model provides a pipeline, include metal base and inside lining in the anticorrosive coating of metal base's internal surface, the anticorrosive coating includes anticorrosive coating intermediate part, anticorrosive coating first end and anticorrosive coating second end, anticorrosive coating first end has the first terminal surface of anticorrosive coating, its characterized in that, the thickness of anticorrosive coating first end surface is greater than the thickness of anticorrosive coating intermediate part.

2. The conduit according to claim 1, wherein the metal matrix comprises a metal matrix middle portion, a metal matrix first end portion, and a metal matrix second end portion, the metal matrix first end portion having a metal matrix first end face, the metal matrix first end face having a thickness less than a thickness of the metal matrix middle portion.

3. The pipe of claim 2 wherein the sum of the average thicknesses of the intermediate portion of the corrosion protection layer and the intermediate portion of the metal matrix is D0 and the sum of the thicknesses of the first end surface of the corrosion protection layer and the first end surface of the metal matrix is D1, wherein 0.9 x D0 x D1 x 1.1 x D0.

4. The pipe of claim 2, wherein the inner surface of the first end of the metal matrix comprises a chamfer or a curve and/or the inner surface of the first end of the corrosion protection layer comprises a chamfer or a curve.

5. The pipe according to claim 1, wherein the thickness of the first end surface of the corrosion protection layer is 0.8mm or more, or 1mm or more, or 1.2mm or more, or 1.5mm or more, or 2mm or more.

6. The pipeline of claim 1, wherein the corrosion protection layer is made of a polymeric organic material or an inorganic non-metallic material.

7. A pipe system comprising at least two pipes according to claim 1, a first pipe and a second pipe, respectively, wherein the pipe system further comprises an intermediate corrosion resistant seal layer positioned intermediate the first pipe and the second pipe.

8. The piping system of claim 7, further comprising a first adhesive corrosion barrier seal layer bonded to the first end surface of the corrosion barrier of the first pipe, a second adhesive corrosion barrier seal layer bonded to the first end surface of the corrosion barrier of the second pipe, and the intermediate corrosion barrier layer between the first and second adhesive corrosion barrier seal layers.

9. The piping system of claim 7, further comprising a coupling device for coupling said first pipe and said second pipe, said coupling device comprising a flange.

10. The piping system of claim 9, wherein said flange provides for connection of said first and second pipes by one or more of the following three means:

1) the outer surface of the first pipeline is provided with a first clamping structure, the outer surface of the second pipeline is provided with a second clamping structure, and the first pipeline is connected with the second pipeline through the matching of the flange and the first clamping structure;

2) the flange is connected with the first pipeline and the second pipeline through threads, so that the first pipeline and the second pipeline are connected;

3) the flange is connected with the first pipeline and the second pipeline through fixing pieces, so that the first pipeline and the second pipeline are connected.

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