Anti-corrosion pipeline capable of being rapidly replaced

Abstract

The utility model discloses an anticorrosion pipeline capable of being quickly replaced, which comprises a steel pipe and a polytetrafluoroethylene pipe, one end of the steel pipe is provided with a first flange, the other end of the steel pipe is provided with a second flange, one end of the second flange far away from the steel pipe is provided with a third flange, and the polytetrafluoroethylene pipe is arranged in the steel pipe. The PTFE pipe comprises a PTFE pipe body and a flanging structure, one end of the PTFE pipe body penetrates through the steel pipe and then is located on the outer side of the first flange, and the other end of the PTFE pipe body penetrates through the steel pipe and then is located on the outer side of the third flange and is provided with a flanging structure. According to the utility model, the external seamless steel pipe can be repeatedly used, so that the cost is greatly saved; the PTFE pipe is high in replacement speed, and the pipeline manufacturing period is greatly shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of anticorrosive pipeline, and particularly relates to a replaceable anticorrosive pipeline. BACKGROUND

[0002] Four fluorine pipes are widely used in the anticorrosive field due to their excellent acid and alkali resistance, and steel-lining four fluorine composite pipes are obtained by lining four fluorine pipes in seamless steel pipes, which utilize the anticorrosive property of four fluorine pipes and the strength of seamless steel pipes, and are suitable for corrosive media with high temperature and pressure.

[0003] After being used for a certain period of time, the steel-lining four fluorine pipeline needs to be replaced due to blockage or leakage, and the old pipeline is generally scrapped. The steel-lining four fluorine pipeline is relatively expensive, and the cost is higher if it is completely scrapped. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a replaceable anticorrosive pipeline to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a replaceable anticorrosive pipeline, comprising a steel pipe and a four fluorine pipe, wherein one end of the steel pipe is provided with a first flange, the other end of the steel pipe is provided with a second flange, the second flange is provided with a third flange away from one end of the steel pipe, the steel pipe is provided with the four fluorine pipe, the four fluorine pipe comprises a four fluorine pipe body and a flange structure, one end of the four fluorine pipe body is provided with the flange structure outside the first flange after penetrating through the steel pipe, and the other end of the four fluorine pipe body is provided with the flange structure outside the third flange after penetrating through the steel pipe.

[0006] Preferably, the first flange is welded on the steel pipe, the second flange is welded on the steel pipe, and the first flange and the third flange are connected through bolts.

[0007] Preferably, the fourth flange and the third flange are locked through fastening bolts, and the flange structure is extruded on the third flange after locking.

[0008] Preferably, the fourth flange is provided with a connecting thread matched with the dismounting ring.

[0009] Preferably, the second flange is provided with a dismounting bolt hole and a first connecting bolt hole, the third flange is provided with a dismounting bolt hole and a second connecting bolt hole, and the fourth flange is provided with a third connecting bolt hole.

[0010] Compared with the prior art, the pipeline uses installation, the first flange is bolted with adjacent pipelines, one end of the double flange adopts a long bolt to pass through the second flange, the third flange and is connected with adjacent pipelines. When the tetrafluoro pipe needs to be replaced, the pipeline is first disassembled, at this time, the two flanges at the double flange end are in a separated state, two disassembly bolt holes (the number and size are determined according to requirements) are processed on the second flange and the third flange, M10x1.5 inner hexagonal bolts are used as disassembly bolts, the diameter of the hole processed on the third flange is greater than the diameter of the inner hexagonal head of the bolt by 2-3 mm, the bolt passes through the second flange, the third flange and is connected with the fourth flange, and the third flange and the fourth flange are used to compress the folded edge part of the tetrafluoro pipe on the third flange. When the old tetrafluoro pipe is disassembled, the first flange is fixed and the folded edge part of the tetrafluoro pipe on the end face is cleaned, the fourth flange is provided with a disassembly ring, the disassembly ring is connected with a traction device (such as a reversing chain, a winch or the like), and the old tetrafluoro pipe is pulled out of the steel pipe by using traction force. The external seamless steel pipe can be repeatedly used, and the cost is greatly saved; the tetrafluoro pipe is replaced quickly, and the pipeline manufacturing period is greatly shortened. BRIEF DESCRIPTION OF DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation to the present application. In the drawings:

[0012] Figure 1 is a structural schematic view of the present application;

[0013] Figure 2 is a structural schematic view of the fourth flange of the present application during installation;

[0014] Figure 3 is a structural schematic view of the second flange of the present application;

[0015] Figure 4 is a structural schematic view of the third flange of the present application;

[0016] Figure 5 is a structural schematic view of the fourth flange of the present application.

[0017] In the drawings: 1, first flange; 2, steel pipe; 3, tetrafluoro pipe; 4, second flange; 5, third flange; 6, fourth flange; 7, disassembly ring; 31, tetrafluoro pipe body; 32, folded edge structure; 41, disassembly bolt hole; 42, first connecting bolt hole; 51, second connecting bolt hole; 61, third connecting bolt hole; 62, connecting thread. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only to represent selected embodiments of the present application.

[0019] Please refer to Figures 1-5 In the embodiments of the present application, a replaceable corrosion-resistant pipeline comprises a steel pipe 2 and a Teflon pipe 3, one end of the steel pipe 2 is provided with a first flange 1, the other end of the steel pipe 2 is provided with a second flange 4, the second flange 4 is provided with a third flange 5 away from one end of the steel pipe 2, the first flange 1 is welded on the steel pipe 2, the second flange 4 is welded on the steel pipe 2, the first flange 1 and the third flange 5 are connected by bolts, the steel pipe 2 is provided with the Teflon pipe 3, the Teflon pipe 3 comprises a Teflon pipe body 31 and a flange structure 32, one end of the Teflon pipe body 31 is provided with the flange structure 32 outside the first flange 1 after penetrating through the steel pipe 2, the other end of the Teflon pipe body 31 is provided with the flange structure 32 outside the third flange 5 after penetrating through the steel pipe 2. One end of the pipeline adopts a double-flange structure, the inner second flange is welded together with the steel pipe, when lining the Teflon pipe, the second flange and the third flange are bolted together, the Teflon pipe is penetrated through the entire steel pipe and is flanged at the first flange and the third flange. When the pipeline is used and installed, the first flange is bolted with the adjacent pipeline, one end of the double-flange adopts a long bolt which is penetrated through the second flange and the third flange and is connected with the adjacent pipeline. When the Teflon pipe needs to be replaced, the pipeline is first disassembled, at this time, the two flanges of the double-flange end are in a separated state, two disassembly bolt holes (the number and size are determined according to the needs) are processed on the second flange and the third flange, an M10x1.5 inner hexagonal bolt is used as the disassembly bolt, the diameter of the hole processed on the third flange is 2-3mm larger than the diameter of the inner hexagonal head of the bolt, the bolt is penetrated through the second flange and the third flange and is connected with the fourth flange, the third flange and the fourth flange are used to compress the flanged part of the Teflon pipe on the third flange. When the old Teflon pipe is disassembled, the first flange is fixed and the flanged part of the Teflon pipe on the end surface is cleaned, the fourth flange is provided with a disassembly ring, the disassembly ring is connected with a traction device (such as a reversing chain, a winch, etc.), the old Teflon pipe is pulled out from the steel pipe by using the traction force. When the new Teflon pipe is lined, a small amount of appropriate lubricating grease is applied on the surface, so as to facilitate disassembly and assembly.

[0020] The fourth flange 6 is locked with the third flange 5 through fastening bolts, and the flanging structure 32 is pressed on the third flange 5 after locking; the fourth flange 6 is provided with a dismounting ring 7 at one end away from the third flange 5, and the fourth flange 6 is provided with a connecting thread 62 matched with the dismounting ring 7; the second flange 4 is provided with a dismounting bolt hole 41 and a first connecting bolt hole 42, the third flange 5 is provided with a dismounting bolt hole 41 and a second connecting bolt hole 51, and the fourth flange 6 is provided with a third connecting bolt hole 61.

[0021] The working principle of the utility model is as follows: one end of the pipeline adopts a double-flange structure, the inner second flange is welded with the steel pipe, the second flange and the third flange are connected together through bolts when lining the PTFE pipe, and the PTFE pipe is flanged at the first flange and the third flange after passing through the whole steel pipe. When the pipeline is used and installed, the first flange is bolted with the adjacent pipeline, and the double-flange one end is connected with the adjacent pipeline through long bolts passing through the second flange and the third flange. When the PTFE pipe needs to be replaced, the pipeline is first disassembled, at this time, the two flanges of the double-flange end are in a separated state, two dismounting bolt holes are respectively processed on the second flange and the third flange (the number and size are determined according to the requirement), M10x1.5 inner hexagonal bolts are used as the dismounting bolts, the diameter of the hole processed on the third flange is 2-3mm larger than the diameter of the inner hexagonal head of the bolt, the bolts pass through the second flange and the third flange and are connected with the fourth flange, and the third flange and the fourth flange are used to compress the flanged part of the PTFE pipe on the third flange. When the old PTFE pipe is dismounted, the first flange is fixed and the flanged part of the PTFE pipe on the end face is cleaned, the fourth flange is provided with a dismounting ring, the dismounting ring is connected with a traction device (such as a reversing chain, a winch or the like), and the old PTFE pipe is pulled out from the steel pipe by using the traction force. When lining the new PTFE pipe, a small amount of appropriate lubricating grease is applied on the surface, so as to facilitate dismounting and mounting.

[0022] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. A quick-change corrosion control pipe, characterized by: Including steel pipe (2) and four fluorine pipe (3), first flange (1) is installed to one end of steel pipe (2), second flange (4) is installed to the other end of steel pipe (2), third flange (5) is installed to the end of second flange (4) away from steel pipe (2), four fluorine pipe (3) is arranged in steel pipe (2), four fluorine pipe (3) includes four fluorine pipe body (31) and flanging structure (32), flanging structure (32) is arranged to the outside of first flange (1) after one end of four fluorine pipe body (31) penetrates steel pipe (2), flanging structure (32) is arranged to the outside of third flange (5) after the other end of four fluorine pipe body (31) penetrates steel pipe (2).

2. A quick-change corrosion-resistant pipe according to claim 1, characterized in that: First flange (1) is welded on steel pipe (2), second flange (4) is welded on steel pipe (2), first flange (1) and third flange (5) are connected by bolt.

3. A quick change corrosion resistant pipe as claimed in claim 1, wherein: It further includes fourth flange (6), fourth flange (6) and third flange (5) are locked by fastening bolt, after locking, flanging structure (32) is extruded on third flange (5).

4. A quick-change corrosion-resistant pipe according to claim 3, characterized in that: Fourth flange (6) is installed with dismounting ring (7) to the end away from third flange (5), fourth flange (6) is provided with connecting thread (62) matched with dismounting ring (7).

5. A quick-change corrosion-resistant pipe according to claim 3 or 4, characterized in that: Second flange (4) is provided with dismounting bolt hole (41) and first connecting bolt hole (42), third flange (5) is provided with dismounting bolt hole (41) and second connecting bolt hole (51), fourth flange (6) is provided with third connecting bolt hole (61).

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