CN207921503U - A kind of corrosion-resistant thermal insulation composite square-tube - Google Patents

Abstract

The utility model discloses a kind of corrosion-resistant thermal insulation composite square-tubes, including square steel tube, it is built-in with anti-corrosion leak-proof pipe in square steel tube, the first insulating layer is filled between anti-corrosion leak-proof pipe and square steel tube, is connected as one by support link between anti-corrosion leak-proof pipe, the first insulating layer and the internal face of square steel tube；The second insulating layer is coated in the outside wall surface of square steel tube, being equidistantly bundled on the second insulating layer has ribs, and protection outer layer covers are compounded in the outside of the second insulating layer and ribs；The both ends of the square steel tube carry connecting flange；It is sealed using fluid sealant between the anti-corrosion leak-proof pipe and square steel tube of square tube end.The utility model prevents petroleum liquid from being in direct contact with square steel tube internal face, to effectively improve the anti-corrosive properties of square steel tube itself by the built-in multiple tube with anti-corrosion leak-proof function inside square steel tube；By the setting of insulating layer, the heat preservation and insulation of composite square-tube entirety is effectively improved, the influence for preventing ambient temperature variation from being generated to petroleum transportation in pipe.

Description

A kind of corrosion-resistant thermal insulation composite square-tube

Technical field

The utility model is related to petroleum transportation fields, more particularly to a kind of corrosion-resistant thermal insulation composite square-tube.

Background technology

Square tube is a kind of section light thin wall steel pipe of square hollow, also referred to as steel cold-forming shapes, it be with hot rolling or Cold-strip steel or roll bending are type of the base material after cold bend(ing) machine-shaping again through square cross-sectional shape size made of high-frequency welding Steel, for hot rolling spy's heavy wall square tube except wall thickness thickens outer situation, corner size and edge glacing flatness meet or exceed electric resistance welding The level of cold forming square tube, square tube comprehensive mechanical property is good, and weldability is cold, and hot-working character and corrosion resistance are good, have Good low-temperature flexibility.

Petrochemical industry often uses various square tubes, currently, the square tube that petrochemical industry uses has following lack Point：1. impermeable antiseptic property is poor, service life is short；2. do not have heat-insulating property or poor thermal insulation property, petroleum transportation situation by Weather influences big.

Utility model content

The utility model can solve existing stone mainly solving the technical problems that provide a kind of corrosion-resistant thermal insulation composite square-tube The above problem existing for oily transport square tube.

In order to solve the above technical problems, the technical solution that the utility model uses is：It is multiple to provide a kind of corrosion-resistant thermal insulation Square tube, including square steel tube are closed, anti-corrosion leak-proof pipe is built-in in the square steel tube, between the anti-corrosion leak-proof pipe and the square steel tube Filled with the first insulating layer, pass through the company of support between the anti-corrosion leak-proof pipe, the first insulating layer and the internal face of the square steel tube Bar is connected as one；It is coated with the second insulating layer in the outside wall surface of the square steel tube, is equidistantly bundled on second insulating layer There are ribs, the protection outer layer covers to be compounded in the outside of second insulating layer and ribs；The square steel tube and described The cross section of anti-corrosion leak-proof pipe is square structure；The both ends of the square steel tube carry connecting flange；Positioned at the square tube end It is sealed using fluid sealant between the anti-corrosion leak-proof pipe and square steel tube.

In one preferred embodiment of the utility model, the anti-corrosion leak-proof pipe is aluminium foil, polyethylene and polytetrafluoroethylene (PTFE) Multiple tube；Wherein, the polyethylene layer is conformed to inside and outside the aluminium foil, towards the described poly- of the square tube interior side The polytetrafluorethylecoatings coatings are coated on pvdf layer.

In one preferred embodiment of the utility model, first insulating layer is glue powder polyphenyl particle layer；Described second Insulating layer is foam polyurethane layer.

In one preferred embodiment of the utility model, the thickness of first insulating layer is second insulation layer thickness 1/3~1/2.

In one preferred embodiment of the utility model, the protection outer layer is wearing layer, and thickness is 12~15mm.

In one preferred embodiment of the utility model, the wearing layer is abrasive rubber layer.

The utility model has the beneficial effects that：A kind of corrosion-resistant thermal insulation composite square-tube of the utility model, by square steel tube The built-in multiple tube with anti-corrosion leak-proof function in portion, prevents petroleum liquid from being in direct contact with square steel tube internal face, to effectively carry The high square steel tube anti-corrosive properties of itself, improve the service life of composite square-tube；By respectively setting one layer of heat preservation on square steel tube inside and outside wall Layer, effectively improves the heat preservation and insulation of composite square-tube entirety, prevents ambient temperature variation from being generated to petroleum transportation in pipe Influence.

Description of the drawings

Fig. 1 is a kind of cross-sectional view of one preferred embodiment of corrosion-resistant thermal insulation composite square-tube of the utility model；

Fig. 2 is the structural schematic diagram of shown anti-corrosion leak-proof pipe；

The label of each component is as follows in attached drawing：1. square steel tube, 2. anti-corrosion leak-proof pipes, 3. first insulating layers, 4. support links, 5. the second insulating layer, 6. ribs, 7. protection outer layers, 8. connecting flanges, 21. aluminium foils, 22. polyethylene layers, 23. polytetrafluoroethyl-nes Alkene.

Specific implementation mode

The preferred embodiment of the utility model is described in detail below in conjunction with the accompanying drawings, so that the advantages of the utility model It can be easier to be readily appreciated by one skilled in the art with feature, it is apparent clear to be made to the scope of protection of the utility model Define.

It please refers to Fig.1 and Fig. 2, the utility model embodiment includes：

Embodiment 1

A kind of corrosion-resistant thermal insulation composite square-tube, including square steel tube 1 are built-in with anti-corrosion leak-proof pipe 2 in the square steel tube 1, described The first insulating layer 3, the anti-corrosion leak-proof pipe 2, the first insulating layer 3 and institute are filled between anti-corrosion leak-proof pipe 2 and the square steel tube 1 It states and is connected as one by support link 4 between the internal face of square steel tube 1；It is coated with second in the outside wall surface of the square steel tube 1 Insulating layer 5, equidistantly bundle has ribs 6, the protection outer layer 7 to wrap up and be compounded in described second on second insulating layer 5 The outside of insulating layer 5 and ribs 6；The cross section of the square steel tube 1 and the anti-corrosion leak-proof pipe 2 is square structure；The side The both ends of steel pipe 1 carry connecting flange 8；Using close between the anti-corrosion leak-proof pipe 2 and square steel tube 1 of the square tube end Sealing 9 seals.

Specifically, the square steel tube is steel cold-forming shapes pipe, and section is square structure, and wall thickness is 0.5~3cm.

The anti-corrosion leak-proof pipe 2 is the multiple tube of aluminium foil 21, polyethylene layer 22 and polytetrafluoroethylene (PTFE) 23；Wherein, the aluminium The polyethylene layer 22 is conformed to inside and outside foil 21, towards the polyethylene layer 22 of the square tube interior side on coat 23 coating of the polytetrafluoroethylene (PTFE).The cross section of the anti-corrosion leak-proof pipe is also square structure.This seemingly anti-seepage pipe have prevent stone On the one hand the effect of oil infiltration can effectively obstruct oil and act on the contact corrosion of square steel tube 1, on the other hand, its own With excellent corrosion resistance, the service life of composite square-tube is improved.The internal diameter of the anti-corrosion leak-proof pipe 2 is the square steel tube The 1/6~1/4 of internal diameter.

First insulating layer 3 is glue powder polyphenyl particle layer, is bonded by glue powder polyphenyl particle and acrylic acid adhesive. First insulating layer 3 is tightly packed and the gap that is fitted between the anti-corrosion leak-proof pipe 2 and square steel tube 1 in, and pass through support Itself and anti-corrosion leak-proof pipe 2 and square steel tube 1 are fixed as one by connecting rod 4, wherein support link 4 is built in first insulating layer It is interior.

Second insulating layer 5 is foam polyurethane layer, is coated on the outer surface of the square steel tube 1, and set by interval The bundle of reinforcing rib 6 set is fixed.The thickness of second insulating layer 5 is 2~3 times of 3 thickness of the first insulating layer.It is kept the temperature by upper layer The design of layer can effectively improve the heat insulation effect of composite square-tube, and barrier ambient temperature variation is to square tube interior space temperature Influence, to improve oil, natural gas transmission performance stability.

The protection outer layer 7 is wearing layer, specially abrasive rubber layer, and thickness is 12~15mm, and tight is the The outer surface of two insulating layers 5 and reinforcing rib 6, can improve the wear-resisting property of composite square-tube, especially improve on the outside of composite square-tube The second insulating layer wear-resisting property, ensure that the heat preservation property of composite square-tube is stable, persistently, that improves composite square-tube uses the longevity Life.

At the both ends of each section composite square-tube, square steel tube 1 and anti-corrosion leak-proof pipe 2 are sealed with fluid sealant, it is compound to ensure The structure of square tube and the stability of performance.In addition, for the composite square-tube used as long distance transmission channel, it usually needs will More piece composite square-tube connects, in order to improve the convenience of connection, in the both ends outer wall of the square steel tube of each section composite square-tube Connecting flange is welded on face, to improve the convenience of connection.

The corrosion-resistant thermal insulation composite square-tube of the utility model passes through built-in the answering with anti-corrosion leak-proof function inside square steel tube Pipe is closed, petroleum liquid is prevented to be in direct contact with square steel tube internal face, to effectively improve the anti-corrosive properties of square steel tube itself, is improved multiple Close the service life of square tube；By respectively setting one layer of heat preservation layer on square steel tube inside and outside wall, effectively improve composite square-tube it is whole every Hot heat-insulating property, the influence for preventing ambient temperature variation from being generated to petroleum transportation in pipe.

In addition, the composite square-tube of the utility model can also be used to transmit other liquid or gas, including it is corrosive or It is noncorrosive.

In the description of the present invention, it should be noted that term "upper", "lower", "left", "right", "inner", "outside" etc. The orientation or positional relationship of instruction be based on the orientation or positional relationship shown in the drawings or the utility model product use when The orientation or positional relationship usually put, is merely for convenience of describing the present invention and simplifying the description, rather than instruction or dark Show that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as pair The limitation of the utility model.The above description is only the embodiments of the present invention, is not intended to limit the patent of the utility model Range, equivalent structure or equivalent flow shift made by using the description of the utility model and the drawings, or directly or Other related technical areas are used in indirectly, are equally included in the patent within the scope of the utility model.

Claims (6)

1. a kind of corrosion-resistant thermal insulation composite square-tube, which is characterized in that including square steel tube, anti-corrosion leak-proof is built-in in the square steel tube Pipe, between the anti-corrosion leak-proof pipe and the square steel tube be filled with the first insulating layer, the anti-corrosion leak-proof pipe, the first insulating layer and It is connected as one by support link between the internal face of the square steel tube；The second guarantor is coated in the outside wall surface of the square steel tube Warm layer, equidistantly bundle has ribs, protection outer layer covers to be compounded in second insulating layer and add on second insulating layer The outside of strong rib；The cross section of the square steel tube and the anti-corrosion leak-proof pipe is square structure；The both ends of the square steel tube carry Connecting flange；It is sealed using fluid sealant between the anti-corrosion leak-proof pipe and square steel tube of the square tube end.

2. corrosion-resistant thermal insulation composite square-tube according to claim 1, which is characterized in that the anti-corrosion leak-proof pipe is aluminium foil, gathers Ethylene and polyfluortetraethylecomposite composite pipe；Wherein, the polyethylene layer is conformed to inside and outside the aluminium foil, towards the square tube The polytetrafluorethylecoatings coatings are coated on the polyethylene layer of interior side.

3. corrosion-resistant thermal insulation composite square-tube according to claim 1, which is characterized in that first insulating layer is adhesive polystyrene Stratum granulosum；Second insulating layer is foam polyurethane layer.

4. corrosion-resistant thermal insulation composite square-tube according to claim 1 or 3, which is characterized in that the thickness of first insulating layer It is the 1/3~1/2 of second insulation layer thickness.

5. corrosion-resistant thermal insulation composite square-tube according to claim 1, which is characterized in that the protection outer layer is wearing layer, Thickness is 12~15mm.

6. corrosion-resistant thermal insulation composite square-tube according to claim 5, which is characterized in that the wearing layer is abrasive rubber layer.