Plastic-coated steel pipe with port anti-corrosion function

Abstract

The utility model relates to the technical field of a plastic-coated steel pipe with a port anti-corrosion function, and discloses a plastic-coated steel pipe with a port anti-corrosion function, which comprises a steel pipe, an anti-corrosion component is arranged on the axial side wall of the steel pipe, and the anti-corrosion component comprises a polyurethane coating layer bonded on the inner wall of the steel pipe. The inner wall of the steel pipe is coated with the polyurethane coating layer, the polyethylene coating layer is bonded on the side wall of the polyurethane coating layer, firstly, the polyurethane coating layer is coated on the inner wall of the steel pipe, the phenomenon that the coating falls off is avoided, then the polyethylene coating layer is coated on the polyurethane coating layer, and the phenomenon that the inner wall of the port of the steel pipe is corroded can be avoided. The polyurethane coating layer can also prevent the polyethylene coating layer from falling off, the outer wall of the steel pipe is coated with the epoxy resin layer, the end opening of the steel pipe can be prevented from being corroded, the service life of the end opening of the steel pipe is prolonged, and air or rainwater is prevented from entering under the cooperation of the steel pipe, the socket pipe, the sealing rubber ring and the installation groove. And the pipeline is prevented from being corroded by acidity of rainwater and acidic substances in air.

Description

TECHNICAL FIELD

[0001] The utility model relates to port anticorrosion plastic coated steel pipe technical field, specifically is a kind of plastic coated steel pipe with port anticorrosion function. BACKGROUND

[0002] Plastic coated steel pipe, also known as plastic coated pipe, steel-plastic composite pipe and plastic coated steel pipe, is a steel-plastic composite pipe with a plastic anticorrosive layer fused on the inner surface of the steel pipe (base pipe) through spraying, rolling, dipping or absorbing process. Plastic coated steel pipe has excellent corrosion resistance and small frictional resistance. Epoxy resin plastic coated steel pipe is suitable for conveying water, seawater, warm water, oil and gas media, and polyvinyl chloride plastic coated steel pipe is suitable for conveying water, seawater, oil and gas media.

[0003] The port of the existing plastic coated steel pipe is in contact with the external environment for a long time when connected. Acidic substances in the air can react with the iron element of the port of the plastic coated steel pipe, causing the port of the plastic coated steel pipe to be corroded and reducing the service life of the port of the plastic coated steel pipe.

[0004] Therefore, we propose a plastic coated steel pipe with port anticorrosion function to solve the problems mentioned above. SUMMARY

[0005] The utility model aims to provide a plastic coated steel pipe with port anticorrosion function to solve the problem of long-time contact with the external environment when connected, which causes the port of the plastic coated steel pipe to be corroded and reduces the service life of the port of the plastic coated steel pipe.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a steel pipe is provided with an anticorrosive assembly on the axial side wall, the anticorrosive assembly includes a polyurethane coating layer bonded to the inner wall of the steel pipe, a polyethylene coating layer bonded to the side wall of the polyurethane coating layer, an epoxy resin layer bonded to the outer wall of the steel pipe, a connecting pipe fixedly installed at one end of the steel pipe, a socket pipe fixedly installed at one end of the connecting pipe, an isolation glue bonded to one end of the socket pipe, and a sealing assembly provided on the inner wall of the socket pipe.

[0007] Preferably, the sealing assembly includes a fixed disc fixedly installed on the inner wall of the socket pipe, an installation slot is formed in the fixed disc, a sealing rubber ring is connected to one end of the steel pipe, and a displacement assembly is provided on the fixed disc.

[0008] Preferably, the displacement assembly comprises a chamber one and a chamber two, the trapezoidal block one is slidably arranged on the chamber two, the spring one is arranged between the trapezoidal block one and the chamber two, and one end of the steel pipe is provided with the socket assembly.

[0009] Preferably, the socket assembly comprises a fixed block, the chamber three is arranged on the fixed block, the trapezoidal block two is slidably arranged on the chamber three, the two limiting plates are fixedly arranged on the side walls of the two trapezoidal blocks two, and the spring two is arranged between the limiting plate and the chamber three.

[0010] Preferably, the thickness of the epoxy resin layer is 0.35 mm.

[0011] Preferably, the thickness of the polyethylene coating layer is 0.6 mm.

[0012] Preferably, the thickness of the polyurethane coating layer is 0.3 mm.

[0013] Preferably, the size of the chamber one is matched with the size of the fixed block.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] 1. The polyurethane coating layer is first coated on the inner wall of the steel pipe to avoid the coating from falling off, then the polyethylene coating layer is coated on the polyurethane coating layer to avoid the corrosion of the inner wall of the steel pipe port, the polyurethane coating layer can prevent the polyethylene coating layer from falling off, the epoxy resin layer is coated on the outer wall of the steel pipe to avoid the corrosion of the steel pipe port, and the service life of the steel pipe port is prolonged.

[0016] 2. When another steel pipe enters the socket pipe, the trapezoidal block two, the trapezoidal block one, the chamber three, the chamber two, the spring one and the spring two are matched to smoothly insert the steel pipe into the socket pipe, so that the two steel pipes are connected together, the connection of the steel pipe is reinforced, and uneven settlement is avoided to cause damage to the steel pipe port. DRAWINGS

[0017] Figure 1 It is a whole three-dimensional structure schematic view of the utility model;

[0018] Figure 2 It is a three-dimensional structure schematic view of the anti-corrosion assembly of the utility model;

[0019] Figure 3 It is a sectional view of the sealing assembly of the utility model;

[0020] Figure 4The displacement assembly sectional view of the utility model;

[0021] Figure 5 The socket assembly sectional view of the utility model Figure 4 The A place enlarged view of the utility model;

[0022] Figure 6 The socket assembly sectional view of the utility model

[0023] Figure 7 The socket assembly sectional view of the utility model Figure 6 The B place enlarged view of the utility model.

[0024] In the drawing: 1, steel pipe; 2, anticorrosive assembly; 21, polyurethane coating layer; 22, polyethylene coating layer; 23, epoxy resin layer; 24, connecting pipe; 25, socket pipe; 26, isolation glue; 3, sealing assembly; 31, fixed disc; 32, mounting groove; 33, sealing rubber ring; 4, displacement assembly; 41, chamber one; 42, chamber two; 43, trapezoidal block one; 44, spring one; 5, socket assembly; 51, fixed block; 52, chamber three; 53, trapezoidal block two; 54, limiting plate; 55, spring two. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] Embodiment one: please refer to Figures 1-3 , including steel pipe 1, the axial side wall of steel pipe 1 is provided with anticorrosive anticorrosive assembly 2, anticorrosive assembly 2 includes polyurethane coating layer 21 bonded on the inner wall of steel pipe 1, the side wall of polyurethane coating layer 21 is bonded with polyethylene coating layer 22, the outer wall of steel pipe 1 is bonded with epoxy resin layer 23, one end of steel pipe 1 is fixedly installed with connecting pipe 24, one end of connecting pipe 24 is fixedly installed with socket pipe 25, one end of socket pipe 25 is bonded with isolation glue 26, the inner wall of socket pipe 25 is provided with sealing assembly 3.

[0027] Socket assembly 5 includes fixedly installed in fixed block 51, the cavity three 52 is set up on fixed block 51, the trapezoidal block two 53 is slidably installed on cavity three 52, two limiting plates 54 are fixedly installed on the side wall of two trapezoidal block two 53, spring two 55 is arranged between limiting plate 54 and cavity three 52.

[0028] The thickness of the epoxy resin layer 23 is 0.35mm, and the epoxy resin layer 23 has excellent adhesion, chemical corrosion resistance, good alkali resistance, and hard coating, and is suitable for being applied on the outer wall of the pipe.

[0029] The thickness of the polyethylene coating layer 22 is 0.6mm, and the polyethylene coating layer 22 has strong corrosion resistance and sealing property, high mechanical strength, strong waterproof property, stable quality, convenient construction, good applicability, and no environmental pollution.

[0030] The thickness of the polyurethane coating layer 21 is 0.3mm, and the polyurethane coating layer 21 has good corrosion resistance, good adhesion, toughness, wear resistance, elasticity, and resistance to acid, alkali, salt, oil, petroleum products, benzene solvents, water, boiling water, seawater, and chemical atmosphere.

[0031] In the embodiment, the polyurethane coating layer 21 is first applied on the inner wall of the steel pipe 1, and the polyurethane coating layer 21 has good adhesion and can prevent the coating from falling off; then the polyethylene coating layer 22 is applied on the polyurethane coating layer 21, and the polyethylene coating layer 22 has strong corrosion resistance and sealing property, high mechanical strength, and strong waterproof property, and can prevent the inner wall of the port of the steel pipe 1 from being corroded; the polyurethane coating layer 21 can also prevent the polyethylene coating layer 22 from falling off, thereby affecting the corrosion resistance; finally, the epoxy resin layer 23 is applied on the outer wall of the steel pipe 1, and the epoxy resin layer 23 has excellent adhesion and chemical corrosion resistance, and can prevent the outer wall of the port of the steel pipe 1 from being corroded due to long-term contact with air, so that some substances in the air can corrode the port of the steel pipe 1; when the second steel pipe 1 is inserted into the socket pipe 25, the sealing rubber ring 33 at the other end of the steel pipe 1 enters the installation groove 32, so that the entire pipe is sealed, air or rainwater is prevented from entering, and the acidity of rainwater and acidic substances in the air can corrode the pipe.

[0032] Embodiment two: the embodiment is improved on the basis of embodiment one, and details are shown in Figures 4-7 The sealing assembly 3 comprises a fixed disc 31 fixedly installed on the inner wall of the socket pipe 25, the fixed disc 31 is provided with an installation groove 32, one end of the steel pipe 1 is connected with a sealing rubber ring 33, and the fixed disc 31 is provided with a displacement assembly 4.

[0033] The displacement assembly 4 comprises a cavity one 41 and a cavity two 42 formed in the fixed disc 31, the cavity two 42 is slidably installed with a trapezoidal block one 43, the trapezoidal block one 43 and the cavity two 42 are provided with a spring one 44, and one end of the steel pipe 1 is provided with a socket assembly 5.

[0034] The size of the cavity one 41 matches the size of the fixed block 51, and the fixed block 51 can smoothly enter the cavity one 41.

[0035] In the embodiment, when another section steel pipe 1 enters the socket pipe 25, the trapezoidal block two 53 and the trapezoidal block one 43 are in contact, the trapezoidal block two 53 enters the chamber three 52, the trapezoidal block one 43 enters the chamber two 42, then the trapezoidal block one 43 is extended out of the chamber two 42 by the action of the spring one 44, the trapezoidal block two 53 is extended out of the chamber three 52 by the action of the spring two 55, at this time, the steel pipe 1 is smoothly inserted into the socket pipe 25, the two steel pipes 1 are connected together, the connection of the steel pipe 1 is reinforced, uneven settlement is avoided, and damage of the steel pipe 1 port is caused.

[0036] The contents not described in detail in the specification belong to the prior art known by the person skilled in the art.

[0037] Although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, the technical scheme recorded in the foregoing embodiments can be modified, or part of the technical features can be replaced equivalently, 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 plastic coated steel pipe having a port corrosion prevention function, comprising a steel pipe (1), characterized in that: The anticorrosion assembly (2) is arranged on the axial side wall of the steel pipe (1), the anticorrosion assembly (2) comprises a polyurethane coating layer (21) adhered to the inner wall of the steel pipe (1), the side wall of the polyurethane coating layer (21) is adhered with a polyethylene coating layer (22), the outer wall of the steel pipe (1) is adhered with an epoxy resin layer (23), one end of the steel pipe (1) is fixedly installed with a connecting pipe (24), one end of the connecting pipe (24) is fixedly installed with a socket pipe (25), one end of the socket pipe (25) is adhered with a separation glue (26), and the inner wall of the socket pipe (25) is provided with a sealing assembly (3). The sealing assembly (3) comprises a fixed disc (31) fixedly installed on the inner wall of the socket pipe (25), the fixed disc (31) is provided with a displacement assembly (4), and the fixed disc (31) is provided with a mounting groove (32).

2. The plastic coated steel pipe with port anti-corrosion function according to claim 1, characterized in that: The displacement assembly (4) comprises chamber one (41) and chamber two (42) formed in the fixed disc (31), the trapezoidal block one (43) is slidably installed on the chamber two (42), the spring one (44) is arranged between the trapezoidal block one (43) and the chamber two (42), and the socket assembly (5) is arranged at one end of the steel pipe (1).

3. The plastic coated steel pipe with port anti-corrosion function according to claim 2, characterized in that: The socket assembly (5) comprises a fixed block (51) fixedly installed, the fixed block (51) is provided with a displacement assembly (4), and the fixed block (51) is provided with a chamber three (52).

4. The plastic coated steel pipe with port anti-corrosion function according to claim 3, characterized in that: The thickness of the epoxy resin layer (23) is 0.35mm.

5. The plastic coated steel pipe with port anti-corrosion function according to claim 4, characterized in that: The thickness of the polyethylene coating layer (22) is 0.6mm.

6. The plastic coated steel pipe with port anti-corrosion function according to claim 5, characterized in that: The thickness of the polyurethane coating layer (21) is 0.3mm.

7. The plastic coated steel pipe with port anti-corrosion function according to claim 6, characterized in that: The size of the chamber one (41) is matched with the size of the fixed block (51).

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