High-strength fiber lining stainless steel composite pipe

Abstract

The utility model relates to the technical field of composite pipes, in particular to a high-strength fiber lining stainless steel composite pipe which comprises a pipeline, a telescopic pipe joint is installed at a pipe opening of the pipeline, and a corrugated pipe section is arranged on the telescopic pipe joint. The smooth section of the telescopic pipe joint is inserted into the inner wall of the composite pipeline in a welded mode, the two sections of pipelines are connected through the telescopic pipe joint, and the two sections of pipelines deform to a certain degree in the installation process due to environment temperature changes and foundation settlement. The corrugated pipe sections on the telescopic pipe joints generate certain displacement in the transverse direction or the longitudinal direction, the influence on the strength performance of the pipeline is avoided, telescopic deformation caused by axial, transverse and angular heating of the pipeline is compensated and absorbed, equipment vibration is absorbed, the influence of equipment vibration on the pipeline is reduced, meanwhile, vibration generated by equipment can be absorbed, and the service life of the pipeline is prolonged. The adverse effect on equipment caused by vibration is relieved, and leakage or damage of the compensation connector caused by excessive displacement of the pipeline is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of composite pipes, in particular to a high-strength fiber-lined stainless steel composite pipe. Background Art

[0002] Stainless steel composite pipes are favored by people because of their strong rigidity, high temperature resistance, corrosion resistance, strong impact resistance, and durability. Stainless steel composite pipes are mainly used in salt chemical engineering, petrochemical engineering, environmental protection equipment, anti-corrosion equipment, chemical storage tanks and pipelines, lead smelting pots, drying equipment, water conservancy projects, etc.

[0003] Because the pipe joints of some pipelines are affected by foundation settlement or water hammer in the pipeline, the internal stress inside the pipeline changes, causing the pipeline to expand and contract axially, laterally, and angularly. At the same time, the pipeline is constantly subjected to resistance at the joint due to vibration, which makes the pipeline joint easy to misalign, posing a risk of leakage and affecting the service life of the pipeline.

[0004] Therefore, we proposed a high-strength fiber-lined stainless steel composite pipe. Utility Model Content

[0005] The purpose of the utility model is to solve the problem in the prior art that the pipe interface is deformed due to expansion and contraction caused by external force, resulting in poor sealing of the connection and to reduce the cost of using stainless steel materials in large-diameter and medium and low pressure water pipelines, and to propose a high-strength fiber-lined stainless steel composite pipe.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A high-strength fiber-lined stainless steel composite pipe comprises a pipe, wherein a telescopic pipe joint is installed at the pipe opening of the pipe, a corrugated pipe section is arranged on the telescopic pipe joint, a smooth section is arranged on the telescopic pipe joint, and the smooth section at one end is connected to the pipe.

[0008] A further solution of the utility model is that a sealing ring is installed on the telescopic pipe joint, and the sealing ring is installed at the butt joint of the telescopic pipe joint.

[0009] A further solution of the utility model is that the pipeline is composed of an inner liner, an inner surface layer, a structural layer and an outer surface layer from the inside to the outside.

[0010] A further solution of the utility model is that the thickness of the inner surface layer and the outer surface layer is smaller than the thickness of the structural layer.

[0011] A further solution of the utility model is that the material of the bellows section of the telescopic pipe joint is thin-walled metal.

[0012] Compared with the prior art, the utility model provides a high-strength fiber-lined stainless steel composite pipe, which has the following beneficial effects.

[0013] 1. In the utility model, by inserting the smooth section of the expansion pipe joint into the inner wall of the composite pipe by socket welding, two sections of pipes are connected by the expansion pipe joint. The bellows section on the expansion pipe joint compensates and absorbs the axial, transverse, and angular expansion and contraction deformations caused by external forces on the pipe, absorbs the vibration of the equipment, reduces the influence of the equipment vibration on the pipe, and at the same time can absorb the vibration generated by the equipment, slow down the adverse effects on the equipment caused by the vibration, and prevent the leakage or damage of the compensation joint due to excessive displacement of the pipe.

[0014] 2. In the utility model, the corrosion resistance and pressure-bearing capacity of the pipe are improved through the multi-layer setting of the pipe, thereby reducing the material cost and increasing the service life of the pipe.

[0015] Other advantages, objectives, and features of the utility model will be described to some extent in the subsequent specification; and to some extent, based on the study of the following text, they will be obvious to those skilled in the art; or, they can be taught from the practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 is an exploded schematic diagram of the connection structure of the utility model;

[0018] Figure 3 is a schematic diagram of the ring pressing structure of the expansion pipe joint of the utility model;

[0019] Figure 4 is the Figure 3 schematic diagram of the sectional structure at A in the utility model;

[0020] Figure 5 is a schematic diagram of the clamp connection structure of the expansion pipe joint of the utility model.

[0021] Reference numerals:

[0022] 1. Pipe; 11. Inner lining pipe; 12. Inner surface layer; 13. Structural layer; 14. Outer surface layer; 2. Expansion pipe joint; 21. Bellows section; 22. Smooth section; 3. Sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments.

[0024] Referring to Figures 1-5 , for the high-strength fiber-lined stainless steel composite pipe of the present utility model, it includes a pipe 1. A telescopic pipe joint 2 is installed at the pipe orifice of the pipe 1. A corrugated pipe section 21 is provided on the telescopic pipe joint 2. The corrugated pipe section 21 plays a role in compensating for deformation during connection. A smooth section 22 is provided on the telescopic pipe joint 2. One end of the smooth section 22 is connected to the pipe 1. During the connection of the pipe 1, the smooth section 22 of the telescopic pipe joint 2 is inserted and welded into the inner wall of the pipe 1. The two pipes 1 are connected through the telescopic pipe joint 2. During the installation and operation of the two pipes 1, due to the influence of foundation settlement or water hammer action in the pipe, the internal stress inside the pipe changes, causing axial, lateral, and angular telescopic deformation of the pipe. The telescopic deformation is compensated and absorbed by the corrugated pipe section 21 on the telescopic pipe joint 2, the vibration of the equipment is absorbed, the influence of the equipment vibration on the pipe 1 is reduced, and at the same time, the vibration generated by the equipment can be absorbed, the adverse influence on the equipment caused by the vibration is slowed down, and the leakage or damage of the compensation joint caused by the excessive displacement of the pipe 1 is prevented.

[0025] A sealing ring 3 is installed on the telescopic pipe joint 2. The sealing ring 3 is installed at the butt joint of the telescopic pipe joint 2. It should be noted that when the pipe diameter is less than or equal to 100 mm, the connection method between the telescopic pipe joints 2 is ring pressing, that is, the two telescopic pipe joints 2 are inserted into the ring pressing pipe fitting, and a special pressure tool is used to compress and deform the ring pressing pipe fitting to form a filled seal, so as to connect the two different pipes 1. When the pipe diameter is greater than 100 mm, a groove is provided at one end of the telescopic pipe joint 2 away from the pipe 1. The groove is processed by a rolling machine. The sealing ring 3 is located at the groove where the two telescopic pipe joints 2 are connected. A clamp is located outside the sealing ring 3. At this time, by tightening the clamp, the sealing ring 3 is hermetically connected to the groove joint of the telescopic pipe joint 2, so as to ensure the tightness of the connection of the telescopic pipe joint 2. Attached Figure 5It is a schematic diagram of a clamp connection. In another embodiment, the connection method of the telescopic pipe joint 2 also includes a flange connection, which will not be specifically described here. The pipe 1 consists of an inner lining 11, an inner surface layer 12, a structural layer 13, and an outer surface layer 14 from the inside out. The thicknesses of the inner surface layer 12 and the outer surface layer 14 are less than that of the structural layer 13. The inner lining 11 is a thin-walled stainless steel. Liquid flows inside the inner lining 11. The good corrosion resistance and hygienic performance of the stainless steel material ensure that the inner wall of the pipe will not be corroded, adhered with dirt, or cause secondary pollution to the transported liquid. The inner surface layer 12 is an anti-corrosion layer to prevent the outer surface of the inner lining 11 from being permeated and corroded by groundwater, etc. The structural layer 13 is a circumferential composite layer to enhance the pressure-bearing capacity and strength of the pipe 1. This layer is a composite layer formed by impregnating continuous fibers, fabrics, chopped fibers, quartz sand, or wire mesh with resin glue in accordance with the design ratio. The outer surface layer 14 is a protective layer formed by covering with continuous fibers or fiberglass cloth, which is resistant to external corrosion and the erosion of soil during burial. The multi-layer setting of the pipe 1 improves the corrosion resistance, pressure-bearing capacity, and strength of the pipe 1, thereby increasing the service life of the pipe 1.

[0026] It should be noted that the corrugated pipe section 21 of the telescopic pipe joint 2 is made of thin-walled metal. In this solution, it is made of thin-walled stainless steel.

[0027] In the present utility model, two different pipes 1 are connected in cooperation through the telescopic pipe joint 2. Due to the influence of foundation settlement or water hammer action in the pipe during the installation and operation of the telescopic pipe joint 2, the internal stress inside the pipe changes, causing axial, lateral, and angular telescopic deformations of the pipe. The corrugated pipe section 21 on the telescopic pipe joint 2 compensates and absorbs this telescopic deformation, absorbs equipment vibration, reduces the influence of equipment vibration on the pipe 1, and at the same time can absorb the vibration generated by the equipment, slow down the adverse effects on the equipment caused by vibration, prevent the pipe 1 from leaking or being damaged due to excessive displacement of the compensation joint, and improve the seismic effect of the composite pipe.

[0028] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

[0029] In the description of this specification, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined. The description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0030] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as a limitation on the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A high-strength fiber-lined stainless steel composite pipe, comprising a pipe (1), wherein a telescopic pipe joint (2) is installed at the pipe opening of the pipe (1), characterized in that: The telescopic pipe joint (2) is provided with a bellows section (21), and the telescopic pipe joint (2) is provided with a smooth section (22), and the smooth section (22) at one end is connected to the pipeline (1).

2. The high-strength fiber-lined stainless steel composite pipe according to claim 1, characterized in that: A sealing ring (3) is installed on the telescopic pipe joint (2), and the sealing ring (3) is installed at the butt joint of the telescopic pipe joint (2).

3. The high-strength fiber-lined stainless steel composite pipe according to claim 1, characterized in that: The pipeline (1) is composed of an inner liner (11) from the inside to the outside. 、 An inner surface layer (12), a structural layer (13) and an outer surface layer (14).

4. The high-strength fiber-lined stainless steel composite pipe according to claim 3, characterized in that: The thickness of the inner surface layer (12) and the outer surface layer (14) is smaller than the thickness of the structural layer (13).

5. The high-strength fiber-lined stainless steel composite pipe according to claim 1, characterized in that: The material of the bellows section (21) of the telescopic pipe joint (2) is thin-walled metal.

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