Quickly replaceable lining multi-medium glass steel pipeline

Abstract

This utility model discloses a multi-media fiberglass pipe with a quickly replaceable liner, relating to the field of fiberglass pipes. It includes an external pressure-bearing pipe and a first inner liner pipe fitted inside the external pressure-bearing pipe. A second inner liner pipe is connected to the left side of the first inner liner pipe, and a liner replacement mechanism is provided at the connection between the second and first inner liner pipes. The liner replacement mechanism has an installation thread, which is located at the connection between the first and second inner liner pipes. When the second and first inner liner pipes are connected, the connection is gradually advanced by rotating the installation thread. As the second inner liner pipe is gradually installed, a pre-set positioning plate at its end rotates synchronously during the rotation, ultimately precisely embedding into the corresponding annular groove at the end of the first inner liner pipe. This structure not only achieves a preliminary sealing effect but also plays a positioning and protection role during the connection of the left and right inner liner pipes.

Description

Technical Field

[0001] This utility model relates to the field of fiberglass pipe technology, specifically a multi-media fiberglass pipe with a quickly replaceable inner lining. Background Technology

[0002] Fiberglass pipes are composite pipe structures with an internal lining added to fiberglass pipes. The overall idea is to improve the comprehensive performance of the pipes by adding a layer of corrosion-resistant, wear-resistant, and impermeable material to the inner surface of the pipes, so as to meet the application requirements of specific working conditions.

[0003] In existing technologies, when using fiberglass pipes to dredge different media, the different materials can easily lead to poor compatibility of the fiberglass pipes, making it impossible to replace the inner lining.

[0004] To overcome the above shortcomings, a Chinese patent (publication number CN206299915U) discloses a detachable fiberglass pipe, comprising a U-shaped outer pipe, a U-shaped inner liner, a U-shaped intermediate body, an upper glass cover, and a flange connecting piece. The U-shaped intermediate body and the U-shaped inner liner are sequentially installed inside the U-shaped outer pipe. The upper glass cover is placed over the opening of the U-shaped outer pipe to seal the opening. A flange connecting piece is installed on one end of the U-shaped outer pipe. The structure is simple and the design is reasonable. It facilitates observation of the internal condition of the pipe and allows for direct replacement of the inner liner after corrosion, greatly reducing subsequent use and maintenance costs.

[0005] While existing technologies can overcome the shortcomings mentioned above, other problems still exist in their operation. For example, after the fiberglass pipe lining is corroded, it needs to be replaced. When replacing long pipes, the length of the pipe can cause a lot of work and require a lot of physical effort. The replacement is not convenient and the replacement efficiency is low. Utility Model Content

[0006] The purpose of this utility model is to provide a multi-media fiberglass pipe with a quickly replaceable inner lining, in order to solve the problems mentioned in the background art, where after the inner lining of the fiberglass pipe is corroded by the material, it is necessary to replace the inner lining. When replacing long pipes, the length of the pipe can easily lead to a complicated workload, consume a lot of physical strength, and make the replacement inconvenient and inefficient.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a multi-media fiberglass pipe with a quickly replaceable inner lining, comprising an external pressure-bearing pipe and a first inner lining pipe sleeved inside the external pressure-bearing pipe, wherein a second inner lining pipe is connected to the left side of the first inner lining pipe, and an inner lining replacement mechanism is provided at the connection between the second inner lining pipe and the first inner lining pipe.

[0008] Furthermore, the liner replacement mechanism is provided with an installation thread, which is located at the connection between the first liner tube and the second liner tube, and the first liner tube and the second liner tube are connected by the installation thread.

[0009] Furthermore, an annular positioning plate is fixedly installed at the end of the second inner liner tube, and the end of the positioning plate is embedded in the annular groove opened at the end of the first inner liner tube.

[0010] Furthermore, an annular first sealing airbag is provided inside the groove of the first inner liner tube, and the positioning plate and the first sealing airbag form a press-fit structure.

[0011] Furthermore, a second sealing airbag is fixedly installed on the inner end of the first inner liner tube, and the second sealing airbag and the end of the second inner liner tube form a compression structure, and the second sealing airbag and the first sealing airbag are connected by an air supply pipe.

[0012] Furthermore, the external pressure-bearing pipe is composed of an inner surface coupling layer, a structural reinforcement layer and an outer protective layer from the inside out. The inner surface coupling layer is made of a high-precision polished gel coating, and the structural reinforcement layer is made of alkali-free glass fiber roving and high-performance epoxy resin. Moreover, the structural reinforcement layer is manufactured by a winding molding process, and the outer protective layer is made of an anti-aging polymer film.

[0013] Furthermore, the first inner liner tube and the second inner liner tube are made of the same material, and the materials of the first inner liner tube and the second inner liner tube, from the inside out, are an ultra-slippery wear-resistant sealing layer, an inner anti-corrosion liner body, and a structurally reinforced backing layer, respectively. The ultra-slippery wear-resistant sealing layer is made of modified polytetrafluoroethylene, and the structurally reinforced backing layer is made of a mixture of glass fiber chopped strand mat and flexible vinyl ester resin.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. When the second inner liner tube is installed with the first inner liner tube, the connection is gradually advanced by rotating the installation thread. As the second inner liner tube is gradually installed, the positioning plate at its end rotates synchronously during the rotation process, and finally accurately embeds into the annular groove at the corresponding position at the end of the first inner liner tube. This structure not only achieves a preliminary sealing effect, but also plays a positioning and protection role during the docking of the left and right inner liner tubes, making the installation and disassembly of the liner more convenient and efficient. Workers can quickly replace the liner with different materials or functions according to the actual working conditions, which greatly improves the ease of operation and system adaptability. Furthermore, after the positioning plate is fully embedded in the groove of the first inner liner tube, due to the tight fit between the structures, the positioning plate continuously compresses the first sealing airbag gasket set in the groove. The airbag gasket deforms during the compression process and fills the micro gap at the connection of the two inner liner tubes, thereby significantly enhancing the sealing performance of the connection area. This design is particularly suitable for working environments that transport different media and effectively reduces the risk of media leakage caused by loose connection. Furthermore, when the first sealing airbag is compressed, the air sealed inside is forced into the second sealing airbag surrounding the outside of the interface through the pre-embedded air supply pipe. After inflation, the second sealing airbag expands rapidly and tightly wraps around the outer surface of the connection between the first inner liner and the second inner liner, forming an additional outer sealing layer. This dual sealing mechanism further improves the sealing level of the entire interface and significantly reduces the possibility of media leakage. It is suitable for high-pressure, corrosive, or environmentally sensitive special media transportation scenarios.

[0015] 2. The outer protective layer uses an anti-aging polymer film as the main material. This material has excellent weather resistance and chemical stability, and can effectively block ultraviolet radiation, wind and rain erosion, and damage to the fiberglass substrate from various chemical splashes, thereby significantly extending the overall service life of the pipeline. The structurally reinforced backing layer is made of chopped fiberglass mat and flexible vinyl ester resin through mixing and curing. This composite material system maintains a certain degree of flexibility while providing necessary rigid support for the internal functional lining. The presence of the backing layer greatly improves the overall strength and deformation resistance of the lining structure, effectively avoiding damage caused by operational stress during the disassembly and replacement of the lining, thus balancing structural safety and maintenance convenience. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0017] Figure 2 This is a cross-sectional three-dimensional structural diagram of the present invention.

[0018] Figure 3 This is a cross-sectional view of the connection between the first inner liner tube and the second inner liner tube of this utility model.

[0019] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0020] Figure 5 This is a schematic diagram of the exploded structure of the first sealing airbag of this utility model.

[0021] Figure 6 This is a schematic diagram of the internal material structure of the external pressure-bearing pipe of this utility model.

[0022] Figure 7 This is a schematic diagram of the internal material structure of the first inner liner tube and the second inner liner tube of this utility model.

[0023] In the diagram: 1. External pressure-bearing pipe; 2. First inner liner pipe; 3. Second inner liner pipe; 4. Installation thread; 5. Positioning plate; 6. First sealing airbag; 7. Gas transmission pipeline; 8. Second sealing airbag; 9. Inner surface coupling layer; 10. Structural reinforcement layer; 11. Outer protective layer; 12. Super-slippery wear-resistant sealing layer; 13. Inner liner anti-corrosion body; 14. Structural reinforcement backing layer. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: As Figures 1-5 The technical solution shown is a multi-media fiberglass pipe with a quickly replaceable inner liner. To address the problem of low efficiency in replacing the inner liner, the following is disclosed: an outer pressure-bearing pipe 1 and a first inner liner pipe 2 sleeved inside the outer pressure-bearing pipe 1. A second inner liner pipe 3 is connected to the left side of the first inner liner pipe 2, and an inner liner replacement mechanism is provided at the connection between the second inner liner pipe 3 and the first inner liner pipe 2. The inner liner replacement mechanism is provided with an installation thread 4, which is located at the connection between the first inner liner pipe 2 and the second inner liner pipe 3, and the first inner liner pipe 2 and the second inner liner pipe 3 are connected by the installation thread 4. Next, an annular positioning plate 5 is fixedly installed at the end of the second inner liner tube 3, and the end of the positioning plate 5 is embedded in the annular groove opened at the end of the first inner liner tube 2. An annular first sealing airbag 6 is provided inside the groove of the first inner liner tube 2, and the positioning plate 5 and the first sealing airbag 6 form a pressing structure. A second sealing airbag 8 is fixedly installed at the inner end of the first inner liner tube 2, and the second sealing airbag 8 and the end of the second inner liner tube 3 form a pressing structure. The second sealing airbag 8 and the first sealing airbag 6 are connected by an air supply pipe 7.

[0026] When using this fiberglass pipe, the left side of the first inner liner 2 is pre-embedded inside the outer pressure-bearing pipe 1, and the right end of the second inner liner 3 is also embedded into the inner wall of the outer pressure-bearing pipe 1, so that the second inner liner 3 corresponds to the first inner liner 2. After installation, the fiberglass pipe can be used. After moving the fiberglass pipe to a suitable position, it is connected through the connecting holes on both sides of the outer pressure-bearing pipe 1. At the same time, when the second inner liner 3 is connected to the first inner liner 2, it is installed by rotating the installation thread 4. After the second inner liner 3 is installed, the positioning plate 5 installed at the end of the second inner liner 3 rotates and embeds into the groove at the end of the first inner liner 2, thereby achieving a sealing effect. This provides positioning protection when the inner liners on both sides are connected, allowing for quick disassembly of the inner liner. The liner can be easily disassembled and installed with different materials according to actual needs, making it more convenient for staff to replace. After the positioning plate 5 is embedded in the groove inside the first inner liner tube 2, the positioning plate 5 compresses the first sealing airbag 6 as it is squeezed. The first sealing airbag 6 is compressed to seal the first inner liner tube 2 and the second inner liner tube 3, further improving the sealing effect and preventing leakage when conveying different media. Furthermore, after the first sealing airbag 6 is compressed, the air inside is sent into the second sealing airbag 8 through the air supply pipe 7. After receiving the gas, the second sealing airbag 8 expands and fits against the outside of the connection between the first inner liner tube 2 and the second inner liner tube 3, further improving the sealing effect and reducing the risk of leakage.

[0027] Example 2: Figures 1-7 The technical solution shown, based on Embodiment 1, discloses the following to address the problem of poor pipeline performance: the external pressure-bearing pipe 1 is composed of an inner surface coupling layer 9, a structural reinforcement layer 10, and an outer protective layer 11 from the inside out. The inner surface coupling layer 9 is made of a high-precision polished gel coating, and the structural reinforcement layer 10 is made of alkali-free glass fiber roving and high-performance epoxy resin. The structural reinforcement layer 10 is manufactured using a winding molding process. The outer protective layer 11 is made of an anti-aging polymer film. The first inner liner pipe 2 and the second inner liner pipe 3 are made of the same material, and the materials of the first inner liner pipe 2 and the second inner liner pipe 3, from the inside out, are a super-slippery wear-resistant sealing layer 12, an inner anti-corrosion lining body 13, and a structural reinforcement backing layer 14, respectively. The super-slippery wear-resistant sealing layer 12 is made of modified polytetrafluoroethylene, and the structural reinforcement backing layer 14 is made of a mixture of glass fiber chopped strand mat and flexible vinyl ester resin.

[0028] The external pressure-bearing pipe 1 consists of three layers: an inner surface coupling layer 9, a structural reinforcement layer 10, and an outer protective layer 11, from the inside out. The inner surface coupling layer 9 is made of a high-precision polished gel coating, providing an extremely smooth and flat surface to ensure efficient bonding, avoid stress concentration, and aid in sealing. The structural reinforcement layer 10 is located outside the inner surface coupling layer 9. This layer is made of alkali-free glass fiber roving and high-performance epoxy resin, using a winding process to increase the pipe's pressure resistance and load-bearing capacity, ensuring safe operation. The outer protective layer 11 is made of an anti-aging polymer film, protecting the fiberglass material from environmental factors such as ultraviolet radiation, wind, rain, and chemical splashes, extending the overall lifespan of the pipe. The first inner liner 2 and the second inner liner 3 are made of the same material. Both the first inner liner 2 and the second inner liner 3 are composed of an ultra-slippery wear-resistant sealing layer 12, an inner liner anti-corrosion body 13, and a structurally reinforced backing layer 14 from the inside out. The ultra-slippery wear-resistant sealing layer 12 is made of modified polytetrafluoroethylene (PTFE). Modified PTFE can provide an extremely low coefficient of friction, preventing scaling and adhesion, and is especially suitable for media such as slurry and sludge. At the same time, it serves as the primary anti-permeability barrier. The inner liner anti-corrosion body 13 is the main body of the inner liner. The appropriate material of the inner liner can be selected according to the actual situation to meet the needs of the transported medium. Corrosion-resistant materials or high-temperature resistant materials can be selected. The structurally reinforced backing layer 14 is made of a mixture of glass fiber chopped strand mat and flexible vinyl ester resin, which provides rigid support for the soft functional inner liner, improves the structural strength of the inner liner, and avoids easy damage during disassembly and replacement.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-media fiberglass pipe with a quickly replaceable inner liner, comprising an outer pressure-bearing pipe (1) and a first inner liner pipe (2) sleeved inside the outer pressure-bearing pipe (1), characterized in that: The left side of the first inner liner tube (2) is connected to the second inner liner tube (3), and the connection between the second inner liner tube (3) and the first inner liner tube (2) is provided with an inner liner replacement mechanism.

2. The multi-media fiberglass pipe with a quickly replaceable inner lining according to claim 1, characterized in that: The lining replacement mechanism is provided with an installation thread (4), which is located at the connection between the first lining tube (2) and the second lining tube (3), and the first lining tube (2) and the second lining tube (3) are connected by the installation thread (4).

3. A multi-media fiberglass pipe with a quickly replaceable inner lining according to claim 2, characterized in that: The end of the second inner liner tube (3) is fixedly installed with an annular positioning plate (5), and the end of the positioning plate (5) is embedded in the annular groove opened at the end of the first inner liner tube (2).

4. A multi-media fiberglass pipe with a quickly replaceable inner lining according to claim 3, characterized in that: The first inner liner tube (2) has an annular first sealing airbag (6) inside its groove, and the positioning plate (5) and the first sealing airbag (6) form a press-fit structure.

5. A multi-media fiberglass pipe with a quickly replaceable inner lining according to claim 4, characterized in that: The inner end of the first inner liner tube (2) is fixedly installed with a second sealing airbag (8), and the second sealing airbag (8) and the end of the second inner liner tube (3) form a pressing structure, and the second sealing airbag (8) and the first sealing airbag (6) are connected by an air supply pipe (7).

6. A multi-media fiberglass pipe with a quickly replaceable inner lining according to claim 1, characterized in that: The external pressure-bearing pipe (1) is composed of an inner surface coupling layer (9), a structural reinforcement layer (10) and an outer protective layer (11) from the inside to the outside. The inner surface coupling layer (9) is made of a gel coating with high precision polishing. The structural reinforcement layer (10) is made of alkali-free glass fiber roving and high-performance epoxy resin. The structural reinforcement layer (10) is manufactured by winding molding process. The outer protective layer (11) is made of an anti-aging polymer film.

7. A multi-media fiberglass pipe with a quickly replaceable inner lining according to claim 6, characterized in that: The first inner liner tube (2) and the second inner liner tube (3) are made of the same material, and the materials of the first inner liner tube (2) and the second inner liner tube (3) from the inside to the outside are the super-slippery wear-resistant sealing layer (12), the inner anti-corrosion body (13) and the structural reinforcement backing layer (14), respectively. The super-slippery wear-resistant sealing layer (12) is made of modified polytetrafluoroethylene, and the structural reinforcement backing layer (14) is made of a mixture of glass fiber chopped strand mat and flexible vinyl ester resin.

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