CN215215101U

CN215215101U - Seawater pipe cabin penetrating structure with plastic-coated inner wall

Info

Publication number: CN215215101U
Application number: CN202120840260.5U
Authority: CN
Inventors: 戴明城; 郑荣; 韩方林; 陈继军; 徐怀亚; 段文利
Original assignee: 708th Research Institute of CSIC
Current assignee: 708th Research Institute of CSIC
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2021-12-17
Anticipated expiration: 2031-04-22

Abstract

The utility model discloses an inner wall plastic-coated seawater pipe cabin penetrating structure, which is characterized by comprising two seawater pipes which are connected in sequence, wherein the joint of the two seawater pipes is connected through an outer protection pipe, and the outer side of the protection pipe is connected with a watertight bulkhead; the inner wall of the seawater pipe is provided with a plastic coating layer. The utility model discloses a cabin structure of wearing of inner wall plastic-coated sea water pipe, simple structure has improved the corrosion resisting property of wearing the cabin structure, has avoided the anticorrosive plastic-coated layer of welding high temperature destruction, improves this reliability of wearing the cabin structure.

Description

Seawater pipe cabin penetrating structure with plastic-coated inner wall

Technical Field

The utility model relates to a watertight structure that cabin was worn to boats and ships inner wall plastic-coated sea water pipe belongs to the boats and ships pipeline and wears cabin technical field.

Background

Pipeline penetration is very common during the construction of ships. The conventional pipeline cabin penetrating structure is in a web plate type, a sleeve pipe type and a sleeve pipe and web plate type, and the pipeline cabin penetrating structure needs to be welded and fixed on the cabin wall in order to meet the requirements of fire prevention, water tightness and structural strength among the cabin walls. However, the paint layer, the zinc coating or the plastic coating on the inner surface of the pipeline can be damaged at extremely high temperature generated in the welding process, so that the anticorrosion effect of the pipeline is lost, and microcracks are easily generated in the welding process, so that the service life of the pipeline is influenced. Because seawater has corrosivity, such as the damage of an anticorrosion protective layer and the welding defects of micro cracks, the seawater pipe is likely to be corroded and leaked in a short time, and potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: anticorrosive structures such as paint layers, zinc coatings or plastic coatings on the inner surfaces of cabin-penetrating pipelines are easy to damage during high-temperature welding, so that cabin-penetrating structural members are not resistant to seawater corrosion, and the service life of the cabin-penetrating structural members is influenced.

In order to solve the technical problem, the technical scheme of the utility model is to provide a seawater pipe cabin penetrating structure with a plastic-coated inner wall, which is characterized by comprising two seawater pipes connected in sequence, wherein the joint of the two seawater pipes is connected through an outer protection pipe, and the outer side of the protection pipe is connected with a watertight bulkhead; the inner wall of the seawater pipe is provided with a plastic coating layer.

Preferably, one end of each of the two sea water pipes is connected with each other, and the other end of each of the two sea water pipes is provided with a flange.

Preferably, the outer wall of the end part of the seawater pipe between the two sleeves is also provided with a plastic coating.

Preferably, the outer sides of the two sea water pipes are respectively sleeved with a sleeve, and two sides of the protection pipe are respectively connected with the outer sides of the two sleeves.

More preferably, two sides of the protection tube are respectively overlapped with the two sleeve parts, and a cavity is formed between the connection part of the protection tube and the two seawater tubes and between the two sleeve parts.

Further, the cavity is an annular radial gap.

Furthermore, an anti-corrosion epoxy resin filler layer is filled in the cavity.

Furthermore, the thickness of the anticorrosive epoxy resin filler layer is 2-4 mm smaller than that of the sleeve; and a radial gap of 2.5-5.5 mm is arranged between the protection tube and the anticorrosive epoxy resin packing layer. The radial gap of 2.5-5.5 mm forms an air heat insulation layer when the protection pipe is welded so as to prevent the epoxy resin from being melted by heating. The flange and the protection tube should have enough space to ensure that enough axial moving space does not influence the construction of the anti-corrosion epoxy resin after the protection tube is sleeved. The length of the protection tube should consider the adverse effect of high temperature of a welding point on the anticorrosion epoxy resin when the protection tube is welded with the sleeve. The sleeve pipe plays thermal-insulated effect when the protection tube welding, avoids welding high temperature to destroy the plastic-coated layer of sea water pipe subassembly.

The flange is a standard part, and the seawater pipe, the sleeve and the protection pipe are thickened properly to improve the reliability of the cabin penetrating part.

More preferably, the watertight bulkhead is welded to a protection pipe; the flange is welded with the seawater pipe; the sleeve is welded with the seawater pipe; the protection tube is connected with the sleeve in a welding mode.

More preferably, gaps of 0.5-1.5 mm are arranged between the inner surface of the sleeve and the outer surface of the seawater pipe, between the outer surface of the sleeve and the inner surface of the protection pipe, between the inner surface of the watertight bulkhead and the outer surface of the protection pipe, and between the outer surface of the seawater pipe and the inner surface of the flange.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a seawater pipe cabin penetrating structure with a plastic-coated inner wall, which has simple structure, realizes the filling of anticorrosive epoxy resin at the gap of the groove of the structure, and improves the anticorrosive performance of the cabin penetrating structure; the heat insulation of the sleeve and the air layer can avoid damaging the plastic coating layer when the protection pipe is welded, and the reliability of the cabin penetrating structure is improved.

Drawings

FIG. 1 is a schematic view of a cabin penetrating structure of a seawater pipe with a plastic-coated inner wall provided by the utility model;

FIG. 2 is a schematic structural view of a seawater tube assembly;

figure 3 is a schematic view of a plastic coated layer of a seawater tube assembly.

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Examples

The utility model provides a seawater pipe cabin penetrating structure with plastic-coated inner wall, as shown in figure 1, comprising two seawater pipes 1 which are connected in sequence, wherein the joint of the two seawater pipes 1 is connected through a protection pipe 6 at the outer side, and the outer side of the protection pipe 6 is connected with a watertight bulkhead 7; the inner wall of the seawater pipe 1 is provided with a plastic coating layer 4. One end of each of the two sea water pipes 1 is connected with each other, and the other end is provided with a flange 3. The outer wall of the end part of the seawater pipe 1 between the two sleeves 2 is also provided with a plastic coating layer 4. The outer sides of the two seawater pipes 1 are respectively sleeved with a sleeve 2, and the two sides of the protection pipe 6 are respectively connected with the outer sides of the two sleeves 2. The two sides of the protection tube 6 are respectively overlapped with the two sleeves 2, and a cavity is formed between the connection part of the protection tube 6 and the two seawater tubes 1 and between the two sleeves 2. The cavity is an annular radial gap. The cavity is filled with an anticorrosive epoxy resin filler layer 5. The thickness of the anticorrosive epoxy resin filler layer 5 is 2-4 mm smaller than that of the sleeve 2; and a radial gap of 2.5-5.5 mm is arranged between the protection tube 6 and the anticorrosive epoxy resin packing layer 5. The watertight bulkhead 7 is connected with the protection pipe 6 in a welding way; the flange 3 is welded with the seawater pipe 1; the sleeve 2 is welded with the seawater pipe 1; the protective tube 6 is connected with the sleeve 2 in a welding way. Gaps of 0.5-1.5 mm are respectively arranged between the inner surface of the sleeve 2 and the outer surface of the seawater pipe 1, between the outer surface of the sleeve 2 and the inner surface of the protection pipe 6, between the inner surface of the watertight bulkhead 7 and the outer surface of the protection pipe 6, and between the outer surface of the seawater pipe 1 and the inner surface of the flange 3.

As shown in fig. 2, a seawater pipe 1, a sleeve 2 and a flange 3 are welded as shown to form a seawater pipe assembly. The seawater pipe assembly is manufactured by welding and then needs to be cleaned of welding slag, the welding surface is polished and smoothed and then is pickled, and surface oxides are further removed.

As shown in fig. 3, after the seawater tube assembly is cleaned and dried, the surfaces of the flange 3, the inner wall of the seawater tube 1, the left end surface of the seawater tube 1, the right end surface of the seawater tube 1, the partial outer wall on the left side of the seawater tube 1, and the like, which are in contact with seawater, are all subjected to plastic coating (or anti-corrosion paint coating, zinc coating) and anti-corrosion treatment.

As shown in fig. 1, the number of the seawater tube assemblies is 2, the sizes and the manufacturing methods are the same and interchangeable, and after the seawater tube assemblies are coated with plastics and before the seawater tube assemblies are oppositely installed from the left direction and the right direction, the protection tubes 6 need to be sleeved in advance.

In order to facilitate the sheathing and welding construction, gaps of 0.5-1.5 mm are reserved between the inner surface of the sleeve 2 and the outer surface of the seawater pipe 1, between the outer surface of the sleeve 2 and the inner surface of the protection pipe 6, and between the outer surface of the protection pipe 6 and the inner surface of the opening of the watertight bulkhead 7.

By means of the tool, the 2 seawater pipe assemblies are ensured to have better coaxiality (for example, the angle of the axial lead is less than or equal to 2 degrees), and the axial clearance of the butt joint of the left seawater pipe 1 and the right seawater pipe 1 is less than or equal to 2 mm. A groove is formed between the left seawater pipe 1, the right seawater pipe 1 and the sleeve 2 in the circumferential direction. And coating anticorrosive epoxy resin (containing a binder) in the groove to form an anticorrosive epoxy resin filler layer 5. The axial clearance of the butt joint of the left seawater pipe 1 and the right seawater pipe 1 is small, and the epoxy resin has certain consistency, so that the anticorrosion epoxy cannot flow into the seawater pipes from the clearance. After the anticorrosive epoxy resin is air-dried and shaped, the protection tube 6 can be welded and fixed with the left sleeve 2 and the right sleeve 2, and then the protection tube 6 is welded and fixed with the watertight bulkhead 7.

The thickness of the anticorrosive epoxy resin packing layer 5 is smaller than the thickness of the sleeve by 2-4 mm, namely, a radial gap of 2.5-5.5 mm is theoretically reserved between the anticorrosive epoxy resin packing layer 5 and the protection tube 6. When the protective tube 6 is welded to the watertight bulkhead 7, the radial gap forms an air insulation layer to prevent the epoxy resin from melting by heat.

The distance between the sleeve 2 and the flange 3 is enough to ensure that enough axial moving space is provided after the sleeve is sleeved in the protection pipe 6 so as not to influence the construction of the anticorrosive epoxy resin filler.

The length of the protection tube 6 is longer than the length between the left sleeve 2 and the right sleeve 2, namely the welding point of the protection tube 6 is close to the flange side in the middle of the sleeve 2 so as to prevent the welding point from being too close to the anticorrosive epoxy resin filler layer 5.

The axial clearance part where the left and right seawater tube assemblies are connected is easy to corrode. Because the epoxy resin has strong adhesive force on the surfaces of the metal and the plastic-coated layer and has good water resistance, the groove and the axial gap can play a better anti-corrosion role after being filled with the epoxy resin.

When the protection pipe 6 is welded with the sleeve 2, the sleeve 2 plays a role in heat insulation so as to prevent the plastic coating from being damaged by high welding temperature.

In order to improve the safety and reliability, except for the division flange according to the standard model selection, the thicknesses of the seawater pipe 1, the sleeve 2 and the protection pipe 3 are all thickened properly. And finally, carrying out water tightness test on the cabin penetrating structure.

Claims

1. The seawater pipe cabin penetrating structure with the plastic-coated inner wall is characterized by comprising two seawater pipes (1) which are sequentially connected, wherein the joint of the two seawater pipes (1) is connected through a protection pipe (6) on the outer side, and the outer side of the protection pipe (6) is connected with a watertight cabin wall (7); the inner wall of the seawater pipe (1) is provided with a plastic coating layer (4).

2. The inner wall plastic-coated seawater pipe cabin-penetrating structure according to claim 1, wherein one end of two seawater pipes (1) is connected with each other, and the other end is provided with a flange (3).

3. The inner wall plastic-coated seawater pipe cabin penetrating structure as defined in claim 1, wherein the outer wall of the end part of the seawater pipe (1) between two sleeves (2) is also provided with a plastic-coated layer (4).

4. The inner wall plastic-coated seawater pipe cabin penetrating structure as defined in claim 1, wherein two sleeves (2) are respectively sleeved on the outer sides of two seawater pipes (1), and two sides of the protection pipe (6) are respectively connected with the outer sides of the two sleeves (2).

5. The inner wall plastic-coated seawater pipe cabin penetrating structure as claimed in claim 4, wherein two sides of the protection pipe (6) are respectively partially overlapped with the two sleeves (2), and a cavity is formed between the connection part of the protection pipe (6) and the two seawater pipes (1) and the two sleeves (2).

6. The inner wall plastic-coated seawater pipe penetration structure of claim 5, wherein the cavity is an annular radial gap.

7. The inner wall plastic-coated seawater pipe cabin penetrating structure as claimed in claim 5, wherein an anti-corrosion epoxy resin filler layer (5) is filled in the cavity.

8. The inner wall plastic-coated seawater pipe cabin penetrating structure as claimed in claim 7, wherein the thickness of the anticorrosive epoxy resin packing layer (5) is 2-4 mm smaller than that of the sleeve (2); and a radial gap of 2.5-5.5 mm is arranged between the protection tube (6) and the anticorrosive epoxy resin packing layer (5).

9. The inner wall plastic-coated seawater pipe penetration structure according to claim 4, wherein the watertight bulkhead (7) is welded with a protection pipe (6); the flange (3) is welded with the seawater pipe (1); the sleeve (2) is welded with the seawater pipe (1); the protection tube (6) is connected with the sleeve (2) in a welding mode.

10. The inner wall plastic-coated seawater pipe cabin penetrating structure as claimed in claim 4, wherein gaps of 0.5-1.5 mm are respectively arranged between the inner surface of the sleeve (2) and the outer surface of the seawater pipe (1), between the outer surface of the sleeve (2) and the inner surface of the protection pipe (6), between the inner surface of the watertight bulkhead (7) and the outer surface of the protection pipe (6), and between the outer surface of the seawater pipe (1) and the inner surface of the flange (3).