A kind of sandwich type thermal repair pipe with tensile and bending resistance

Abstract

The present invention provides a tensile and flexural resistant sandwich thermal repair pipe, which includes a thermal repair pipe body, a reinforced interlayer and a tensile and flexural resistant surface layer from the inside to the outside; the tensile and flexural resistant surface layer includes a waterproof layer, a mesh layer and an inner base layer from the outside to the inside; the reinforced interlayer is a reinforced mesh layer. The present invention provides a brand-new thermal repair pipe, which has excellent bonding strength and tensile and flexural resistant properties, ensuring the durability of the thermal repair pipe body; it is designed with a brand-new tensile and flexural resistant surface layer, which has good waterproof and air-tight properties for the internal thermal repair pipe body, and can effectively prevent external moisture from penetrating, while ensuring that the thermal repair pipe body can carry out good heat transmission; it can effectively avoid the extrusion and breakage of thermal insulation materials caused by factors such as surface construction, which affects the thermal insulation and air-tight performance; the overall structure is novel, the production and manufacturing are convenient, and it has good market prospects.

Description

Technical Field

[0001] The invention belongs to the technical field of pipelines, and in particular relates to a tensile and flexural resistant sandwich thermal repair pipe. Background Art

[0002] Thermal repair pipes are used to transport steam and superheated water. Due to the high temperature and pressure of the transported medium, the corrosion of the pipes is relatively serious. Traditional transport pipes are made of metal. Due to the long history of laying, they have begun to show varying degrees of damage and aging. At the same time, due to factors such as crustal movement or surface construction, the transport pipes will move, stretch or bend, affecting the safety of the use of the transport pipes. Therefore, the current thermal pipe repair adopts the method of small pipes through large pipes, and a small thermal repair pipe is inserted into the original pipe. Even if the external transport pipe is stretched and bent, it will not affect the internal thermal repair pipe. Since most thermal pipes are metal pipes with fast heat transfer, the original insulation measure is to wrap a layer of insulation material on the outside of the metal pipe to prevent heat loss. However, as the insulation pipe is damaged after a long period of use, its insulation effect also decreases. Even if a certain amount of insulation material is added between the transport pipe and the thermal repair pipe, it cannot be guaranteed that it still has good durability, airtightness and insulation under long-term use. Most importantly, due to factors such as the terrain and location of the thermal repair pipe, it is more difficult to replace the insulation material regularly.

[0003] Therefore, in view of the above problems, developing a thermal repair pipe with excellent tensile strength and good thermal insulation and air isolation performance is a difficult problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] In order to solve the above problems, the present invention discloses a tensile and flexural resistant sandwich thermal repair pipe.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A tensile and flexural resistant sandwich thermal repair pipe comprises, from inside to outside, a thermal repair pipe body, a reinforced interlayer and a tensile and flexural resistant surface layer; the tensile and flexural resistant surface layer comprises, from outside to inside, a waterproof layer, a mesh layer and an inner layer base; the reinforced interlayer is a reinforced mesh layer.

[0007] Furthermore, the inner substrate is a silica aerogel substrate layer.

[0008] Furthermore, the mesh layer is a non-woven fabric mesh layer or a fiber mesh layer.

[0009] Furthermore, the waterproof layer is a coating waterproof layer.

[0010] Furthermore, the reinforced interlayer is a mesh layer formed by cross-weaving of reinforced carbon long fibers.

[0011] Furthermore, the reinforced carbon long fibers are composed of two strands of carbon long fibers interwoven together, and the feeding angles of the two strands of carbon long fibers are 45° and 135° respectively.

[0012] Furthermore, the surface of the thermal repair pipe body and the inner side surface of the inner layer base are provided with guide grooves matching the reinforced interlayer.

[0013] Furthermore, the guide groove is an arc-shaped groove, and the arc formed by the radial cross section thereof is a minor arc.

[0014] Furthermore, the installation method of the reinforced interlayer is: heat the surface of the thermal repair pipe body and the inner side of the inner layer base at the same time, and when flow deformation occurs, fill the reinforced interlayer between the two; after stopping heating, cool and form it into one piece.

[0015] The beneficial effects of the present invention are:

[0016] 1. Provides a new thermal repair pipe with excellent bonding strength and tensile and flexural properties to ensure the durability of the thermal repair pipe body;

[0017] 2. The design has a new tensile and flexural resistance surface layer, which has good waterproof and air-tight properties for the internal thermal repair pipe body. It can effectively prevent external moisture penetration and ensure that the thermal repair pipe body can carry out good thermal transmission;

[0018] 3. It can effectively avoid the extrusion and damage of insulation materials caused by factors such as surface construction, which will affect the insulation and air-insulating properties;

[0019] 4. The overall structure is novel, the production and manufacturing are convenient, and it has good market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 , a schematic diagram of the structure of the present invention.

[0021] List of illustration symbols: thermal repair pipe body 1, reinforced interlayer 2, waterproof layer 31, mesh layer 32, inner layer base 33. DETAILED DESCRIPTION

[0022] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0023] Embodiment 1:

[0024] like Figure 1 It is a schematic diagram of the structure of the present invention. This embodiment is a tensile and flexural resistant sandwich thermal repair pipe, which includes a thermal repair pipe body 1, a reinforced sandwich 2 and a tensile and flexural resistant surface layer from the inside to the outside.

[0025] The tensile and flexural resistant surface layer includes a waterproof layer 31 , a mesh layer 32 and an inner base layer 33 from the outside to the inside.

[0026] The waterproof layer 31 is a coating waterproof layer, the mesh layer 32 is a non-woven mesh layer, and the inner substrate 33 is a silica aerogel substrate layer.

[0027] The surface of the thermal repair pipe body 1 and the inner side surface of the inner layer base 33 are both provided with guide grooves matching with the reinforcing interlayer 2. The guide grooves are arc-shaped grooves, and the arc formed by the radial cross section is a minor arc.

[0028] The reinforced interlayer 2 is installed between the above two guide grooves. The reinforced interlayer 2 is a reinforced mesh layer, specifically a mesh layer formed by cross-weaving of reinforced carbon long fibers; the reinforced carbon long fibers are composed of two strands of carbon long fibers interwoven, and the feeding angles of the two strands of carbon long fibers are 45° and 135° respectively.

[0029] Since the inner and outer ends of the reinforced interlayer 2 are fitted in two inferior arc-shaped guide grooves, a certain interlayer can be formed between the thermal repair pipe body 1 and the inner layer base 33 by the thickness of the reinforced interlayer 2 itself, further achieving good thermal insulation and air-isolating properties.

[0030] Embodiment 2:

[0031] The present embodiment is a tensile and flexural resistant sandwich thermal repair pipe, which comprises, from the inside to the outside, a thermal repair pipe body 1, a reinforced sandwich 2 and a tensile and flexural resistant surface layer.

[0032] The tensile and flexural resistant surface layer includes a waterproof layer 31 , a mesh layer 32 and an inner base layer 33 from the outside to the inside.

[0033] The waterproof layer 31 is a coating waterproof layer, the mesh layer 32 is a fiber mesh layer, and the inner base layer 33 is a silica aerogel base layer.

[0034] The surface of the thermal repair pipe body 1 and the inner side surface of the inner layer base 33 are both provided with guide grooves matching with the reinforcing interlayer 2. The guide grooves are arc-shaped grooves, and the arc formed by the radial cross section is a minor arc.

[0035] The reinforced interlayer 2 is installed between the above two guide grooves. The reinforced interlayer 2 is a reinforced mesh layer, specifically a mesh layer formed by cross-weaving of reinforced carbon long fibers; the reinforced carbon long fibers are composed of two strands of carbon long fibers interwoven, and the feeding angles of the two strands of carbon long fibers are 45° and 135° respectively.

[0036] Embodiment 3:

[0037] This embodiment provides a specific installation method based on Embodiment 1 and Embodiment 2:

[0038] 1. Prepare the thermal repair pipe body 1 and the materials required for the tensile and flexural resistant surface layer according to the required size of the thermal repair pipe; 2. Bond the waterproof layer 31, the mesh layer 32 and the inner base 33 together from the outside to the inside to form the tensile and flexural resistant surface layer;

[0039] 3. The surface of the thermal repair pipe body 1 and the inner side of the inner layer base 33 are heated simultaneously, and when flow deformation occurs, the reinforcing interlayer 2 is filled between the two;

[0040] 4. Stop heating and wait for cooling to form an integrated unit.

[0041] It should be noted that the above content only illustrates the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications all fall within the protection scope of the claims of the present invention.

Claims

1. A tensile and flexural resistant sandwich thermal repair pipe, characterized in that: The invention comprises, from the inside to the outside, a thermal repair pipe body (1), a reinforced interlayer (2), and a tensile and flexural resistant surface layer; the tensile and flexural resistant surface layer comprises, from the outside to the inside, a waterproof layer (31), a mesh layer (32), and an inner base layer (33); the reinforced interlayer (2) is a reinforced mesh layer, The inner substrate (33) is a silica aerogel substrate layer. The mesh layer (32) is a non-woven fabric mesh layer or a fiber mesh layer. The waterproof layer (31) is a coating waterproof layer. The reinforcing interlayer (2) is a mesh layer formed by cross-weaving of reinforcing carbon long fibers. The reinforced carbon long fibers are composed of two strands of carbon long fibers interwoven together, and the feeding angles of the two strands of carbon long fibers are 45° and 135° respectively. The surface of the thermal repair pipe body (1) and the inner side surface of the inner layer base (33) are both provided with guide grooves matching the reinforced interlayer (2). The guide groove is an arc-shaped groove, and the arc formed by its radial cross section is a minor arc.

2. The tensile and flexural resistant sandwich thermal repair pipe according to claim 1, characterized in that: The method for installing the reinforced interlayer comprises: heating the surface of the thermal repair pipe body (1) and the inner side surface of the inner layer base (33) simultaneously, and when flow deformation occurs, filling the reinforced interlayer (2) between the two; after stopping the heating, cooling and forming the integrated structure.

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