CN213333096U - Pipeline and pipeline system - Google Patents

Abstract

The utility model provides a pipeline and pipeline system, the pipeline include metal base member, inside lining in the anticorrosive coating of metal base member's internal surface and be fixed in metal base member's first ring flange, metal base member has the first terminal surface of metal base member, the anticorrosive coating has the first terminal surface of anticorrosive coating, first ring flange has first ring flange terminal surface, the pipeline still includes the anticorrosive sealing layer of bonding, the anticorrosive sealing layer of bonding in the first terminal surface of metal base member the first terminal surface of anticorrosive coating and first ring flange terminal surface, the anticorrosive sealing layer of bonding includes metal base member anticorrosive coating bonding portion and ring flange bonding portion, the thickness of ring flange bonding portion is less than the thickness of metal base member anticorrosive coating bonding portion. 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, includes metal matrix, inside lining in the anticorrosive coating of metal matrix's internal surface and being fixed in metal matrix's first ring flange, metal matrix has the first terminal surface of metal matrix, the anticorrosive coating has the first terminal surface of anticorrosive coating, first ring flange has first ring flange terminal surface, the pipeline is still including the anticorrosive sealing layer of bonding, the anticorrosive sealing layer of bonding in the first terminal surface of metal matrix the first terminal surface of anticorrosive coating and first ring flange terminal surface, the anticorrosive sealing layer of bonding includes metal matrix anticorrosive coating bonding portion and ring flange bonding portion, the thickness of ring flange bonding portion is less than the thickness of metal matrix anticorrosive coating bonding portion.

Preferably, the average thickness of the flange plate bonding part is D1, the average thickness of the metal matrix anticorrosive coating bonding part is D2, and D1 is less than half of D2.

Preferably, the first flange end surface axially exceeds the first end surface of the metal base body, so that the thickness of the flange bonding portion is smaller than that of the metal base body anticorrosive coating bonding portion.

Preferably, the first flange plate is provided with a first flange plate inner surface, the first flange plate inner surface is transited to the first flange plate end surface through an inclined surface, and the adhesion anticorrosion sealing layer is adhered to the inclined surface of the first flange plate.

Preferably, the material of the bonding anticorrosion sealing layer is an organic bonding anticorrosion material or an inorganic non-metal bonding anticorrosion material.

Preferably, the pipeline further comprises an intermediate anticorrosive sealing layer, and the intermediate anticorrosive sealing layer is fixed to the adhesive anticorrosive sealing layer through a fixing piece.

Preferably, the material of the intermediate anticorrosive sealing layer is a high-molecular anticorrosive material or an inorganic non-metal bonding anticorrosive material.

Preferably, the material of the adhesion anticorrosion sealing layer is an inorganic nonmetal adhesion anticorrosion material, and the material of the middle anticorrosion sealing layer is a polymer anticorrosion material.

Preferably, the metal matrix anticorrosive coating bonding part of the bonding anticorrosive sealing layer is internally provided with a wear-resistant filling part.

The utility model also provides a pipeline system, including two at least fundamental utility model provides a pipeline, be first pipeline and second pipeline respectively, the ring flange is realized through one or more in following two kinds of modes the first end of first pipeline and the connection of the first end of second pipeline:

1) 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 first end of the second pipeline, and the first pipeline and the second pipeline are connected through the matching of the flange and the first clamping structure and the second clamping structure;

2) the flange plate is connected to 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 an exploded view of the pipe shown in fig. 1.

Fig. 3 is a schematic structural view of an adhesive corrosion protective sealant of the pipe 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.

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 two ends of the metal base 100 are also fixedly connected with a first flange 310 and a second flange 320. The metal base 100 has a first metal base end surface 101 and a second metal base end surface 102, the corrosion protection layer 200 has a first corrosion protection layer end surface 201 and a second corrosion protection layer end surface 202, the first flange 310 has a first flange end surface 311, and the second flange 320 has a second flange end surface 321.

The utility model discloses a key lies in sealed above-mentioned various terminal surfaces, including the first terminal surface 101 of metal base body and metal base body second terminal surface 102, the first terminal surface 201 of anticorrosive coating and anticorrosive coating second terminal surface 202, first ring flange terminal surface 311 and second ring flange terminal surface 321, in this embodiment, mainly realize the sealed of terminal surface through the anticorrosive sealing layer. As shown in fig. 2, the corrosion protection sealing layer includes a first adhesive corrosion protection sealing layer 410, a second adhesive corrosion protection sealing layer 420, a first intermediate corrosion protection sealing layer 510, and a second intermediate corrosion protection sealing layer 520. The first bonding anticorrosion sealing layer 410 is bonded to the first end face 101 of the metal base body, the first end face 201 of the anticorrosion layer and the first flange end face 311, so that the first end face 101 of the metal base body, the first end face 201 of the anticorrosion layer and the first flange end face 311 are sealed; the second bonding anticorrosion sealing layer 420 is bonded to the second end surface 102 of the metal substrate, the second end surface 202 of the anticorrosion layer and the second flange end surface 321, so that the second end surface 102 of the metal substrate, the second end surface 202 of the anticorrosion layer and the second flange end surface 321 are sealed.

As shown in fig. 1-3, in this embodiment, the thickness of the first adhesive corrosion protection sealant layer 410 and the second adhesive corrosion protection sealant layer 420 are not uniform. As shown in fig. 3, the first bonding anticorrosion sealing layer 410 comprises a metal matrix anticorrosion layer bonding part 412 and a flange bonding part 413, wherein the metal matrix anticorrosion layer bonding part 412 is used for bonding to the metal matrix first end surface 101 and the anticorrosion layer first end surface 201 and sealing the metal matrix first end surface 101 and the anticorrosion layer first end surface 201; the flange bonding portion 413 functions to bond to the first flange end surface 311 and seal the first flange end surface 311. Similarly, the second adhesive corrosion prevention sealing layer 420 includes a metal matrix corrosion prevention layer adhesive part and a flange adhesive part. As shown in FIG. 3, the flange bonding portion 413 has a thickness D1, the metal matrix anticorrosive coating bonding portion 412 has a thickness D2, and D2 is significantly larger than D1, i.e., the metal matrix anticorrosive coating bonding portion 412 is relatively thick and the flange bonding portion 413 is relatively thin. As shown in fig. 1, the first flange end surface 311 protrudes axially beyond the first end surface 101 of the metal base so that the thickness of the flange bonding portion 413 is smaller than the thickness of the anticorrosion layer bonding portion 412 of the metal base.

This is so arranged as derived from the unexpected findings of the applicant. The utility model discloses the people discovery, when connecting two pipeline fastening flanges, the bonding anticorrosive sealing layer of thickness homogeneous produces the crack easily after receiving the extrusion force, especially, when the material of bonding anticorrosive sealing layer is inorganic nonmetal bonding anticorrosive material, the crack produces more easily. In an experiment, because the size of flange is wrong for the thickness attenuation of ring flange bonding portion, the utility model discloses the people but finds unexpectedly, does not produce the crack after the anticorrosive sealing layer of bonding receives the same extrusion force. Therefore, the utility model discloses the people improves the connection of pipeline, thins the thickness attenuation of ring flange bonding portion. Further, through a series of experiments, the present inventors have found that a preferred embodiment is that the thickness D1 of the flange bonding portion is less than half the thickness D2 of the metal base anticorrosive layer bonding portion.

In addition, in this embodiment, as shown in fig. 1, the first flange 310 has a first flange inner surface that transitions to the first flange end surface 311 through an inclined surface, and the first adhesion corrosion protection seal layer 410 is adhered to the inclined surface of the first flange 310. This is done to enhance the adhesion of the first adhesive corrosion barrier seal 410 to the first flange 310. Similarly, the second flange 320 has a second flange inner surface that transitions to a second flange end surface 321 by a bevel, and the second adhesion corrosion protection seal 420 is adhered to the bevel of the second flange 320.

In addition to the adhesive corrosion protection seal, in this embodiment, the corrosion protection seal also includes a first intermediate corrosion protection seal 510 and a second intermediate corrosion protection seal 520. The first intermediate anticorrosive sealing layer 510 is fixed to the first adhesive anticorrosive sealing layer 410 by a fixing member (not shown), and the second intermediate anticorrosive sealing layer 520 is fixed to the second adhesive anticorrosive sealing layer 410 by a fixing member (not shown). When two pipelines are connected, the fastening flange applies extrusion force, and the middle anticorrosive sealing layers of the two pipelines are tightly attached, so that the purpose of sealing is achieved.

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 anticorrosion sealing layer and the middle anticorrosion sealing layer are different from each other in that: the adhesion anticorrosion sealing layer is made of materials with adhesion performance, and the middle anticorrosion sealing layer is made of anticorrosion materials. The material for making the adhesion anticorrosion sealing layer can be organic adhesion anticorrosion material, such as PFA material or polytetrafluoroethylene material; inorganic non-metallic bonding corrosion-resistant materials such as oxidation and decarburization resistant coatings may also be used. The material for making the intermediate anticorrosion sealing layer can be graphite, expanded graphite, high polymer anticorrosion material (such as polytetrafluoroethylene material), or other suitable materials. When the material of the bonding anticorrosive sealing layer is an inorganic non-metal bonding anticorrosive material, the material of the middle anticorrosive sealing layer is preferably a high-molecular anticorrosive material, because the inorganic non-metal bonding anticorrosive material generally has no compressibility, and the high-molecular anticorrosive material has certain compressibility (elasticity), so that the sealing effect can be enhanced.

In addition, as shown in fig. 1, in this embodiment, the thickness of the end portion of the anticorrosive layer 200 is greater than the thickness of the middle portion of the anticorrosive layer 200. Accordingly, the end portions of the metal base 100 are provided with a slope (may also be a curved surface) so that the thickness of the end portions of the metal base 100 is smaller than the thickness of the middle portion of the metal base 100.

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.

Fig. 1 and 2 also show the structure required for the pipe connection provided by the above-described embodiments.

As shown in fig. 1 and 2, the embodiment provides a pipe connected by flanges. When connecting, the flanges can be welded directly to the ends of the two pipes and then connected by connecting members (e.g., bolts) through the through holes in 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 and 3, a first engaging groove 312 is provided on an outer surface of an end portion of the pipe, and a first engaging member 313 matching with the first engaging groove 312 is further provided, and the first engaging member 313 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 engaging groove 312 during the construction. For a specially shaped first engaging member 313, the first engaging groove 312 may also be a matching shape, for example, the first engaging groove 312 may be a continuous groove around the outer surface of the pipe or may be a plurality of independent recesses. During construction, the first engaging members 313 are first inserted into the first engaging slots 312, and then the first engaging members 313 are welded to the first flange 310, or other connecting methods, such as connecting members, may be used. Correspondingly, the same structure is provided, and the connection of the second flange 320 is also realized by the second clamping groove 322 and the second clamping component 323. And finally, connecting the two pipelines through the two flange plates.

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. After the lining anticorrosive coating is finished, the end of the pipe is cut or polished to form an end face, and then the flange is connected through the following steps:

(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; and embedding a first clamping part into the first clamping groove and embedding a second clamping part into the second clamping groove.

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.

After the flange plate is connected, the bonding anticorrosion sealing layer can be bonded on the end face of the metal base body, the end face of the anticorrosion layer and the end face of the flange plate. The bonding process may be slightly different for bonding the corrosion protection seal layers of different materials. For PFA adhesive materials, a hot melting process is required; for the anti-oxidation and anti-decarbonization coating, only coating and air drying treatment are needed. And finally, fixing the middle anticorrosive sealing layer on the adhesive anticorrosive sealing layer through a fixing piece.

Fig. 4 shows a second embodiment of the connection of the pipes provided by the present invention.

As shown in fig. 4, the structural arrangement of this embodiment is substantially the same as that of the first embodiment, except that a first wear-resistant filling portion 415 is provided inside the metal matrix anticorrosive layer bonding portion of the first adhesive anticorrosive sealing layer 410, and a second wear-resistant filling portion 425 is provided inside the metal matrix anticorrosive layer bonding portion of the second adhesive anticorrosive sealing layer 420. The main function of the first wear-resistant filling portion 415 and the second wear-resistant filling portion 425 is wear resistance, and can be made of wear-resistant materials, such as ceramics, glass, and the like. When the fluid in the conduit contains a large amount of particulate flushes, the first and second wear resistant filler portions 415, 425 can resist the impact of the particulate flushes.

Fig. 5 shows a third embodiment of the connection of the pipes provided by the present invention.

As shown in fig. 5, the pipe provided in this embodiment is also flanged, as in the first embodiment. Unlike the first more specific embodiment, the flange is connected to the pipe by fasteners 80 (e.g., rivets).

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, includes metal matrix, inside lining in the anticorrosive coating of metal matrix's internal surface and being fixed in metal matrix's first ring flange, metal matrix has the first terminal surface of metal matrix, the anticorrosive coating has the first terminal surface of anticorrosive coating, first ring flange has first ring flange terminal surface, a serial communication port, the pipeline is still including the anticorrosive sealing layer of bonding, the anticorrosive sealing layer of bonding bond in the first terminal surface of metal matrix the first terminal surface of anticorrosive coating and first ring flange terminal surface, the anticorrosive sealing layer of bonding includes metal matrix anticorrosive coating bonding portion and ring flange bonding portion, the thickness of ring flange bonding portion is less than the thickness of metal matrix anticorrosive coating bonding portion.

2. The pipe of claim 1 wherein the flange bond has an average thickness of D1, the metal matrix corrosion protection layer bond has an average thickness of D2, and D1 is less than half of D2.

3. The pipe according to claim 1, wherein the first flange end surface axially extends beyond the metal base first end surface such that the thickness of the flange bond is less than the thickness of the metal base corrosion protection layer bond.

4. A duct according to claim 3, wherein said first flange has a first flange inner surface, said first flange inner surface transitioning to said first flange end surface by a chamfer, said adhesion corrosion protective seal layer adhered to said chamfer of said first flange.

5. The pipe according to claim 1, wherein the material of the bonding anticorrosion sealing layer is an organic bonding anticorrosion material or an inorganic non-metallic bonding anticorrosion material.

6. A pipe as claimed in claim 5 further comprising an intermediate corrosion resistant seal layer secured to said adhesive corrosion resistant seal layer by fasteners.

7. The pipeline as claimed in claim 6, wherein the material of the intermediate anticorrosion sealing layer is a high molecular anticorrosion material or an inorganic non-metallic bonding anticorrosion material.

8. The pipeline as claimed in claim 6, wherein the material of the bonding anticorrosion sealing layer is an inorganic non-metal bonding anticorrosion material, and the material of the middle anticorrosion sealing layer is a polymer anticorrosion material.

9. The pipe according to claim 1, wherein the metal matrix corrosion protection layer bonding portion of the bonding corrosion protection sealing layer is internally provided with a wear-resistant filling portion.

10. A pipe system comprising at least two pipes according to claim 1, a first pipe and a second pipe, respectively, wherein the flange is adapted to connect the first end of the first pipe to the first end of the second pipe by one or more of:

1) 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 first end of the second pipeline, and the first pipeline and the second pipeline are connected through the matching of the flange and the first clamping structure and the second clamping structure;

2) the flange plate is connected to the first pipeline and the second pipeline through fixing pieces, so that the first pipeline and the second pipeline are connected.

Images