CN205298963U - A inside lining sliding sleeve for connecting interior coating anti -corrosion loses pipeline - Google Patents

Abstract

A lining sliding sleeve used for connecting inner-coated anti-corrosion pipelines, including a sliding sleeve body, the middle part of the sliding sleeve body is a cylindrical structure with a larger diameter, and is provided with a groove for installing heat insulating materials, the sliding sleeve The two ends of the body have a smaller diameter and are connected to the middle part through a slope transition. The utility model is suitable for butt jointing of pipes with internal coating protection pipe ends to prevent high temperature damage to the internal anti-corrosion coating in the welding heat-affected zone. Due to the small diameter at both ends, the large diameter in the middle, the heat insulation material is arranged with grooves at the large diameter in the middle, the small diameter at both ends is matched with the pipe end after the diameter is expanded, and the sealant is applied to the pipe end, which can facilitate the axial positioning of the site construction , and can realize the protection of the inner surface material of the sliding sleeve against high temperature, so that the connection performance of the sliding sleeve is more perfect and reliable.

Description

Lined sleeves for connecting internally coated corrosion-resistant pipes

technical field

The utility model relates to pipe materials, in particular to an inner lining sliding sleeve used for connecting inner coating anti-corrosion pipelines.

Background technique

In the construction of anti-corrosion pipelines with inner coating, there is a problem that high welding temperature destroys the anti-corrosion material of the inner coating of the pipe ends when the pipe ends are connected. In order to prevent the anti-corrosion layer at the interface from being damaged by welding high temperature, the sliding sleeve technology is widely used. However, the ordinary sliding sleeve connection requires the sealant to withstand high fluid pressure, which requires high performance of the sealant, which is likely to cause seal failure and lead to anti-corrosion failure of the sliding sleeve. Designing a pipe fitting that can not only ensure the sealing effect, but also ensure that the inner coating and the sliding sleeve are not damaged during welding is the key to making the inner sliding sleeve.

Utility model content

The purpose of this utility model is to provide a new type of inner lining sliding sleeve for connecting inner coating anti-corrosion pipelines in order to solve the above problems.

In order to achieve the above purpose, the utility model adopts the following technical solutions: a lining sliding sleeve for connecting inner coating anti-corrosion pipelines, including a sliding sleeve body, the middle part of the sliding sleeve body is a cylinder with a larger diameter structure with grooves for installing insulation.

The two ends of the sliding sleeve body have a smaller diameter and are connected to the middle part through a slope transition.

The two ends of the sliding sleeve body adopt a cylindrical structure with a small diameter, which cooperates with the inner surface of the enlarged pipe end.

The two ends of the sliding sleeve body adopt a conical surface structure with a smaller diameter, which cooperates with the inner surface of the pipe end after the diameter of the tapered surface is enlarged.

The utility model is suitable for butt jointing of pipelines that prevent high temperature damage to the inner anti-corrosion coating in the welding heat-affected zone when the pipe ends of pipelines with inner coating protection are welded. Due to the small diameter at both ends, the large diameter in the middle, the heat insulation material is provided with grooves at the large diameter in the middle, the small diameter at both ends is matched with the pipe end after the diameter is expanded, and the sealant is applied to the pipe end, which can facilitate the axial positioning of the site construction , and can realize the high temperature protection of the inner surface material of the sliding sleeve, so that the connection performance of the sliding sleeve is more perfect and reliable.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the use state of the utility model.

detailed description

Referring to Fig. 1 and Fig. 2, the lining sliding sleeve used for connecting the inner coating anti-corrosion pipeline of the present invention includes a sliding sleeve body, and the middle part of the sliding sleeve body is a cylindrical structure 1 with a larger diameter, and is equipped with a Groove 2 for installing insulation material. The two ends 3 of the sliding sleeve body have a smaller diameter, and are transitionally connected with the middle part through a slope 4 .

The two end parts can adopt a cylindrical structure with a smaller diameter to cooperate with the inner surface of the pipe end after diameter expansion.

Or use a conical surface structure with a smaller diameter to cooperate with the inner surface of the pipe end after the diameter of the conical surface is expanded.

The usage status of the utility model is as shown in Figure 2. It is used to connect in two inner coating anti-corrosion pipes 5. When connecting, fill in the heat insulating material 6 in the groove 2, cover the sheath 7, and add the sealant 8 to the connection between the inner lining sliding sleeve and the two inner coating anti-corrosion pipes 5 respectively.

Since the two ends of the lining sliding sleeve are tightly combined with the pipe end of the inner coating anti-corrosion pipe, the sealant only bears the surface pressure of the fluid, not the pressure difference, and the butt weld at the pipe end does not need to bear the seal requirements, can reduce the design and construction quality requirements of the weld.

The heat insulation material has the effect of conducting the heat of the sliding sleeve at high temperature during drag reduction welding, and prevents the main body material of the sliding sleeve and the anti-corrosion material of the inner coating from being damaged by high welding temperature.

Claims (3)

1. for connecting an interior lining sliding sleeve for undercoating anti-corrosion pipe, including sliding sleeve body, it is characterised in that: the mid portion of described sliding sleeve body is the column structure being relatively large in diameter, and is provided with the groove for installing heat-barrier material; The two end portions diameter of described sliding sleeve body is less, and is connected by chamfered transition with mid portion.

2. the interior lining sliding sleeve for connecting undercoating anti-corrosion pipe as claimed in claim 1, it is characterised in that: the two end portions of described sliding sleeve body adopts the column structure that diameter is less, coordinates with the pipe end inner surface after expanding.

3. the interior lining sliding sleeve for connecting undercoating anti-corrosion pipe as claimed in claim 1, it is characterised in that: the two end portions of described sliding sleeve body adopts the part pyramid like configuration that diameter is less, coordinates with the pipe end inner surface after adopting the conical surface expanding.