Steel lining polytetrafluoroethylene pipeline

Abstract

The utility model relates to the technical field of pipelines, in particular to a steel lining polytetrafluoroethylene pipeline which comprises a steel lining pipe body and a polytetrafluoroethylene pipe body, the polytetrafluoroethylene pipe body is arranged in the steel lining pipe body, a noise reduction layer is arranged between the steel lining pipe body and the polytetrafluoroethylene pipe body, the two ends of the steel lining pipe body are connected with flange plates, and the flange plates are connected with the polytetrafluoroethylene pipe body. The flange plates of every two adjacent steel lining pipe bodies are connected through bolts, a first sealing assembly capable of automatically compensating a gap is arranged between the flange plates of every two adjacent steel lining pipe bodies, and the flange plates of every two adjacent steel lining pipe bodies are further wrapped with a second sealing assembly. The steel lining polytetrafluoroethylene pipe has the advantages that the problem that large noise is easily generated due to the fact that the flow speed of liquid conveyed by the steel lining polytetrafluoroethylene pipe is too high is solved, and the sealing performance of the joint of the two steel lining polytetrafluoroethylene pipes is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of pipeline technology, especially to a steel lining polytetrafluoroethylene pipeline. BACKGROUND

[0002] Chemical plant conveying pipeline generally uses steel lining polytetrafluoroethylene pipe to convey chemical liquid, and the steel lining polytetrafluoroethylene pipe is made of high-quality plunger extruded pipe, which is tightly combined with plastic pipe by special processing technology. The steel lining polytetrafluoroethylene pipe has excellent temperature resistance and corrosion resistance, and is an ideal conveying equipment for strong corrosive media such as nitric acid, sulfuric acid, hydrofluoric acid, phosgene, chlorine, aqua regia, mixed acid, bromide and other organic solvents.

[0003] The existing Chinese patent with publication number CN215243288U discloses a bulking polytetrafluoroethylene pipe, which includes a co-extruded bulking polytetrafluoroethylene layer and an anti-static layer. The center of the bulking polytetrafluoroethylene layer forms a lumen, and the anti-static layer is on the outside of the bulking polytetrafluoroethylene layer. The anti-static layer of the utility model is directly co-extruded with the bulking polytetrafluoroethylene layer, and both of them have undergone stretching and setting. As a result, the anti-static layer and the bulking polytetrafluoroethylene layer have very strong adhesive strength, and the anti-static layer will not fall off. The pipe has durable and stable anti-static performance and long service life.

[0004] When the steel lining polytetrafluoroethylene pipe is used to convey liquid in a chemical plant, it often produces a lot of noise due to the high flow rate. In addition, the sealing performance of the connection between two steel lining polytetrafluoroethylene pipes is poor, causing internal liquid leakage. Moreover, the conveyed liquid in a chemical plant has strong corrosiveness, which can damage the steel lining of the polytetrafluoroethylene pipe and the outer steel lining, reducing the protective performance and temperature resistance of the steel lining. UTILITY MODEL CONTENTS

[0005] To improve the problem of easy generation of a lot of noise due to the high flow rate of the steel lining polytetrafluoroethylene pipe when conveying liquid, and to improve the sealing performance of the connection between two steel lining polytetrafluoroethylene pipes, the present application provides a steel lining polytetrafluoroethylene pipeline.

[0006] The steel lining polytetrafluoroethylene pipeline provided by the present application adopts the following technical solution:

[0007] The utility model provides a kind of steel lining polytetrafluoroethylene pipeline, including steel lining pipe body and polytetrafluoroethylene pipe body, the polytetrafluoroethylene pipe body is arranged inside steel lining pipe body, noise reduction layer is arranged between steel lining pipe body and polytetrafluoroethylene pipe body, the both ends of steel lining pipe body are connected with flange, the flange between adjacent two steel lining pipe bodies is connected by bolt, the first sealing component that can automatically compensate gap is equipped between the flange between adjacent two steel lining pipe bodies, the outside of the flange of adjacent two steel lining pipe bodies is also wrapped with second sealing component.

[0008] Preferably, the noise reduction layer includes a glass fiber sleeve and a galvanized pipe, the galvanized pipe is sleeved outside the polytetrafluoroethylene pipe body, the galvanized pipe is arranged along the length direction of the polytetrafluoroethylene pipe body, the sound insulation hole is formed in the galvanized pipe, the sound insulation hole penetrates the pipe wall of the galvanized pipe, and a plurality of sound insulation holes are uniformly arranged along the pipe surface of the galvanized pipe.

[0009] Preferably, the first sealing component includes an extrusion gasket and a polytetrafluoroethylene sealing ring, the extrusion gasket and the polytetrafluoroethylene sealing ring are both arranged in a circular ring shape, the sealing groove is formed in the flange, the sealing groove is arranged along the circumferential direction of the flange, the sealing grooves can be spliced with each other when the two flanges are butted, the extrusion gasket is clamped in the two sealing grooves, the embedding groove is formed in the extrusion gasket, the embedding groove is arranged along the circumferential direction of the extrusion gasket, the polytetrafluoroethylene sealing ring is clamped in the embedding groove, and the polytetrafluoroethylene sealing ring is located on the inner side of the extrusion gasket.

[0010] Preferably, the second sealing component includes a first hoop ring and a second hoop ring, the cross section of the first hoop ring and the second hoop ring is arranged in a "N" shape, the first hoop ring and the second hoop ring are wrapped outside the two flanges, the first hoop ring and the second hoop ring can be spliced into a whole circular ring, the first connecting plate is connected to the first hoop ring, one first connecting plate is arranged at each end of the first hoop ring, the second connecting plate is connected to the second hoop ring, one second connecting plate is arranged at each end of the second hoop ring, and the adjacent first connecting plate and second connecting plate are connected by bolts.

[0011] Preferably, the surface of the steel lining pipe body and the end of the polytetrafluoroethylene pipe body are both treated by plastic spraying.

[0012] Preferably, the surface of the flange is treated by plastic spraying.

[0013] In summary, the present application has the following beneficial technical effects:

[0014] The utility model provides a kind of steel lining polytetrafluoroethylene pipeline, by setting noise reduction layer between steel lining pipe body and polytetrafluoroethylene pipe body, utilize noise reduction layer to weaken and absorb sound energy, reach the effect of reducing noise, and first sealing assembly and second sealing assembly are set between the flange plate of steel lining pipe body, improve the sealing between two by first sealing assembly being set in two flange plate interiors, improve the overall sealing performance by second sealing assembly being wrapped in the exterior of two flange plate, to reach the problem of improving steel lining polytetrafluoroethylene pipe conveying liquid because flow rate is too fast to easily produce larger noise, and improve the effect of the sealing of two steel lining polytetrafluoroethylene pipe connecting place. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure schematic diagram of steel lining polytetrafluoroethylene pipeline in the embodiment of the application;

[0016] Figure 2 It is the schematic diagram for embodying the internal structure of steel lining polytetrafluoroethylene pipeline in the embodiment of the application;

[0017] Figure 3 It is Figure 2 Enlarged view of A in

[0018] Reference signs: 1, steel lining pipe body;2, polytetrafluoroethylene pipe body;3, noise reduction layer;31, glass fiber sleeve;32, galvanized pipe;321, sound insulation hole;4, flange plate;5, first sealing assembly;51, extrusion gasket;52, polytetrafluoroethylene sealing ring;6, second sealing assembly;61, first hoop;611, first connecting plate;62, second hoop;621, second connecting plate. DETAILED DESCRIPTION

[0019] In order to make the personnel of the prior art better understand the utility model scheme, below will combine the scheme in the embodiment of the utility model with the drawings to be described clearly and completely, obviously, the described embodiment is only a part of the embodiment of the utility model, not all, based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without doing creative work should belong to the scope of the protection of the utility model.

[0020] In the description of the utility model, it is necessary to explain that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation based on the drawing shown, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance, and in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0021] The utility model discloses a kind of steel lining polytetrafluoroethylene pipelines. Refer to Figure 1 、 Figure 2 And Figure 3 , steel lining polytetrafluoroethylene pipeline includes steel lining pipe body 1 and polytetrafluoroethylene pipe body 2, polytetrafluoroethylene pipe body 2 is arranged inside steel lining pipe body 1, noise reduction layer 3 is arranged between steel lining pipe body 1 and polytetrafluoroethylene pipe body 2, the flange plate 4 of both ends of steel lining pipe body 1 is connected, the flange plate 4 between adjacent two steel lining pipe body 1 is connected by bolt, the first sealing assembly 5 that can automatically compensate gap is equipped between the flange plate 4 between adjacent two steel lining pipe body 1, the outside of the flange plate 4 of adjacent two steel lining pipe body 1 is also wrapped with second sealing assembly 6.

[0022] By being arranged between steel lining pipe body 1 and polytetrafluoroethylene pipe body 2 noise reduction layer 3, utilize noise reduction layer 3 to weaken and absorb sound energy, reach the effect of reducing noise, and first sealing assembly 5 and second sealing assembly 6 are arranged between the flange plate 4 of steel lining pipe body 1, the sealing between two flange plates 4 is improved by being arranged inside two flange plates 4 by first sealing assembly 5, and the overall sealing performance is improved by being wrapped in the outside of two flange plates 4 by second sealing assembly 6.

[0023] The noise reduction layer 3 comprises a glass fiber sleeve 31 and a galvanized pipe 32, the galvanized pipe 32 is sleeved outside the polytetrafluoroethylene pipe body 2, the galvanized pipe 32 is arranged along the length direction of the polytetrafluoroethylene pipe body 2, the galvanized pipe 32 is provided with sound insulation holes 321, the sound insulation holes 321 penetrate the pipe wall of the galvanized pipe 32, the sound insulation holes 321 are uniformly arranged on the pipe surface of the galvanized pipe 32, the glass fiber sleeve 31 is sleeved outside the galvanized pipe 32, the glass fiber sleeve 31 is arranged along the length direction of the galvanized pipe 32, when the noise reaches the galvanized pipe 32, the noise is blocked by the sound insulation holes 321 on the galvanized pipe 32, the direct transmission of the sound is reduced, part of the sound energy is absorbed, when the noise reaches the glass fiber sleeve 31, due to the complex fiber structure and a large number of pores inside the glass fiber sleeve 31, the sound is reflected, refracted and scattered for many times, the sound wave energy is weakened.

[0024] The first sealing assembly 5 comprises an extrusion gasket 51 and a polytetrafluoroethylene sealing ring 52, the extrusion gasket 51 and the polytetrafluoroethylene sealing ring 52 are both arranged in a circular ring shape, the flange plate 4 is provided with a sealing groove, the sealing groove is arranged along the circumferential direction of the flange plate 4, the two flange plates 4 can be spliced with each other when they are butted, the extrusion gasket 51 is clamped in the two sealing grooves, the extrusion gasket 51 is provided with an embedding groove, the embedding groove is arranged along the circumferential direction of the extrusion gasket 51, the polytetrafluoroethylene sealing ring 52 is clamped in the embedding groove, the polytetrafluoroethylene sealing ring 52 is located on the inner side of the extrusion gasket 51, when the flange plates 4 are connected, the extrusion gasket 51 and the polytetrafluoroethylene sealing ring 52 are clamped in the sealing groove, the extrusion gasket 51 is in an extrusion state, so that it can automatically compensate the gap between the flange plates 4 due to thermal expansion and cold shrinkage, and the pressure generated by the extrusion of the extrusion gasket 51 can push the polytetrafluoroethylene sealing ring 52 to tightly contact the sealing groove, so as to ensure the sealing performance of the sealing groove, and the corrosion resistance of the polytetrafluoroethylene sealing ring 52 can protect the extrusion gasket 51.

[0025] The second sealing assembly 6 comprises a first hoop ring 61 and a second hoop ring 62, the cross sections of the first hoop ring 61 and the second hoop ring 62 are both arranged in a “N” shape, the first hoop ring 61 and the second hoop ring 62 are both wrapped outside the two flange plates 4, the first hoop ring 61 and the second hoop ring 62 can be spliced into a whole circular ring, the first hoop ring 61 is connected with a first connecting plate 611, the first connecting plate 611 is provided with one at each end of the first hoop ring 61, the second hoop ring 62 is connected with a second connecting plate 621, the second connecting plate 621 is provided with one at each end of the second hoop ring 62, the adjacent first connecting plates 611 and the second connecting plates 621 are connected through bolts, the first hoop ring 61 and the second hoop ring 62 can further clamp the two flange plates 4, and block the gap between the two flange plates 4, which is conducive to improving the overall sealing performance.

[0026] The surface of the steel lining pipe body 1 and the end of the polytetrafluoroethylene pipe body 2 are both subjected to plastic spraying treatment, so that the corrosion resistance and wear resistance of the surface of the steel lining pipe body 1 and the end of the polytetrafluoroethylene pipe body 2 are improved, the steel lining pipe body 1 and the polytetrafluoroethylene pipe body 2 are prevented from being damaged after liquid leakage, and the service life of the steel lining pipe body 1 and the polytetrafluoroethylene pipe body 2 is ensured.

[0027] The surface of the flange plate 4 is also subjected to plastic spraying treatment, so that the flange plate 4 is prevented from being damaged after liquid leakage, and the service life of the flange plate 4 is ensured

[0028] It should be noted that: the above description is only preferred embodiments of the present application, the protection scope of the present application is not limited to the above-mentioned embodiments, any technical solutions falling within the scope of the present application are within the protection scope of the present application. It should be noted that, for ordinary skilled in the art, some improvements and decorations without departing from the principles of the present application, these improvements and decorations should also be considered as the protection scope of the present application.

Claims

1. A polytetrafluoroethylene lined steel pipe comprising a steel pipe body (1) and a polytetrafluoroethylene pipe body (2) disposed inside the steel pipe body (1), characterized in that: The steel lining pipe body (1) and the polytetrafluoroethylene pipe body (2) are provided with a noise reduction layer (3), both ends of the steel lining pipe body (1) are connected with flanges (4), the flanges (4) of adjacent two steel lining pipe bodies (1) are connected through bolts, the flanges (4) of adjacent two steel lining pipe bodies (1) are provided with a first sealing assembly (5) capable of automatically compensating the gap, and the outside of the flanges (4) of adjacent two steel lining pipe bodies (1) is further wrapped with a second sealing assembly (6).

2. A steel lined polytetrafluoroethylene pipe according to claim 1, characterized in that: The noise reduction layer (3) comprises a glass fiber sleeve (31) and a galvanized pipe (32), the galvanized pipe (32) is sleeved outside the polytetrafluoroethylene pipe body (2), the galvanized pipe (32) is arranged along the length direction of the polytetrafluoroethylene pipe body (2), sound insulation holes (321) are formed in the galvanized pipe (32), the sound insulation holes (321) penetrate the pipe wall of the galvanized pipe (32), a plurality of sound insulation holes (321) are uniformly arranged along the pipe surface of the galvanized pipe (32), and the glass fiber sleeve (31) is sleeved outside the galvanized pipe (32) and arranged along the length direction of the galvanized pipe (32).

3. A steel lined polytetrafluoroethylene pipe according to claim 1, characterized in that: The first sealing assembly (5) comprises an extrusion gasket (51) and a polytetrafluoroethylene sealing ring (52), the extrusion gasket (51) and the polytetrafluoroethylene sealing ring (52) are both arranged in a circular ring shape, sealing grooves are formed in the flanges (4) and arranged along the circumferential direction of the flanges (4), the sealing grooves can be spliced with each other when the two flanges (4) are butted, the extrusion gasket (51) is clamped in the two sealing grooves, a recess is formed in the extrusion gasket (51) and arranged along the circumferential direction of the extrusion gasket (51), and the polytetrafluoroethylene sealing ring (52) is clamped in the recess and located on the inner side of the extrusion gasket (51).

4. A steel lined polytetrafluoroethylene pipe according to claim 1, characterized in that: The second sealing assembly (6) comprises a first hoop ring (61) and a second hoop ring (62), the cross sections of the first hoop ring (61) and the second hoop ring (62) are both arranged in a "U" shape, the first hoop ring (61) and the second hoop ring (62) are both wrapped outside the two flanges (4), the first hoop ring (61) and the second hoop ring (62) can be spliced into a whole circular ring, the first hoop ring (61) is connected with a first connecting plate (611), the first connecting plate (611) is provided with one at each end of the first hoop ring (61), the second hoop ring (62) is connected with a second connecting plate (621), the second connecting plate (621) is provided with one at each end of the second hoop ring (62), and adjacent first connecting plates (611) and second connecting plates (621) are connected through bolts.

5. A steel lined polytetrafluoroethylene pipe according to claim 1, characterized in that: The surface of the steel lining pipe body (1) and the end of the polytetrafluoroethylene pipe body (2) are both subjected to plastic spraying treatment.

6. A steel lined polytetrafluoroethylene pipe according to claim 1, characterized in that: The surface of the flange (4) is subjected to plastic spraying treatment.

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