Double-layer corrugated pipe

Abstract

The utility model relates to the technical field of green databases, in particular to a double-layer corrugated pipe which comprises an end flange, a plurality of flange holes penetrating through the interior of the end flange are formed in the surface of the end flange, and the flange holes are annularly distributed along the surface of the end flange at equal intervals. An outer-layer corrugated pipe and an inner-layer corrugated pipe are arranged between the end flanges distributed along the two sides, the outer-layer corrugated pipe surrounds the outer portion of the inner-layer corrugated pipe, and a first annular groove and a second annular groove are formed in the surfaces of the end flanges respectively. According to the double-layer corrugated pipe, the double-layer design of the outer-layer corrugated pipe and the inner-layer corrugated pipe is adopted, the annular grooves and the sealing ring structures of the end flanges are combined, double protection is formed, the outer-layer corrugated pipe is fixed through the first annular groove, the inner-layer corrugated pipe is fixed through the second annular groove, and the outer-layer corrugated pipe and the inner-layer corrugated pipe are further reinforced through welding or gluing. The sealing ring is made of a water-swelling rubber material, so that the sealing performance is enhanced when the sealing ring is in contact with liquid, and high-pressure fluid leakage is effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of green database technology, and in particular to a double-layer corrugated pipe. Background Technology

[0002] Corrugated pipes, as a common pipe structure, are widely used in various industrial and civil fields. However, if corrugated pipes do not have a double-layer structure, an interlayer in the middle, or an external protective layer, they may have some drawbacks that affect their performance and service life.

[0003] First, the lack of a double-layer structure in corrugated pipes reduces their mechanical strength and pressure resistance. Single-layer corrugated pipes are prone to deformation or rupture when subjected to high pressure or external impact, leading to fluid leakage or equipment damage. In addition, single-layer corrugated pipes have relatively poor corrosion resistance and are easily corroded by chemical substances, shortening their service life.

[0004] Secondly, the absence of a sandwich layer in the middle of the corrugated pipe reduces its rigidity and compressive strength. The sandwich material can effectively disperse and absorb external pressure, improving the overall structural strength of the corrugated pipe. Without a sandwich layer, the corrugated pipe is prone to deformation or collapse when subjected to greater pressure, affecting its normal operation.

[0005] Finally, the lack of an external protective layer on corrugated pipes reduces their weather resistance and anti-aging ability. An external protective layer can effectively prevent environmental factors such as ultraviolet rays, oxygen and moisture from corroding the corrugated pipes and extend their service life. Corrugated pipes without an external protective layer are prone to aging, cracking or discoloration when exposed to harsh environments for a long time, affecting their appearance and performance.

[0006] Therefore, we provide a double-layer corrugated pipe. Utility Model Content

[0007] The purpose of this utility model is to address the aforementioned technical problems by providing a double-layer corrugated pipe, which solves the problems that single-layer corrugated pipes are prone to deformation or breakage when subjected to high pressure or external impact, as well as the problem that the lack of an interlayer in the corrugated pipe reduces its rigidity and compressive strength.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a double-layer corrugated pipe, including an end flange, wherein the surface of the end flange is provided with a plurality of flange holes penetrating its interior, the plurality of flange holes are equidistantly distributed in a ring along the surface of the end flange, and an outer corrugated pipe and an inner corrugated pipe are respectively provided between the end flanges distributed on both sides, wherein the outer corrugated pipe surrounds the outside of the inner corrugated pipe.

[0009] The surface of the end flange is provided with an annular groove one and an annular groove two respectively. The end of the outer bellows is inserted into an annular groove one and the end of the inner bellows is inserted into an annular groove two.

[0010] A sealing groove is also provided on the inner wall of the first annular groove. The sealing groove is filled with a sealing ring. The inner wall of the sealing ring is in close contact with the outer wall of the outer corrugated pipe. A sealing groove is provided on the inner wall of the second annular groove. The sealing groove is filled with a sealing ring. The inner wall of the sealing ring is in close contact with the outer wall of the inner corrugated pipe. Both the first and second sealing grooves are annular structures. Both the first and second sealing rings are made of water-swellable rubber material.

[0011] Preferably, a channel is provided at the center of the end flange. The channel has a tapered structure, and the wide opening of the channel is fitted to the inner wall surface of the inner bellows.

[0012] Preferably, the outer corrugated pipe includes a base layer, an impact-resistant layer, a waterproof layer, and a corrosion-resistant layer. The surface of the base layer is wrapped with an impact-resistant layer, the surface of the impact-resistant layer is covered with a waterproof layer, and the surface of the waterproof layer is covered with a corrosion-resistant layer.

[0013] Preferably, the base layer is made of stainless steel, and both the inner and outer parts of the base layer are provided with a corrugated structure.

[0014] Preferably, the impact-resistant layer is made of modified polyurethane material and has a thickness of 0.5-1.2 mm.

[0015] Preferably, the waterproof layer is made of polyvinyl chloride membrane material, and several protrusions are distributed on both the inner and outer surfaces of the waterproof layer.

[0016] Preferably, the corrosion-resistant layer is made of epoxy resin material and has a thickness of 0.2-0.5 mm.

[0017] Preferably, a sandwich tube is provided between the outer corrugated tube and the inner corrugated tube. The sandwich tube has a hollow structure and is filled with an insulation layer. The sandwich tube is made of plastic material and the insulation layer is made of sponge material.

[0018] Preferably, the surface of the end flange is further provided with a number of connecting blocks, and a reinforcing rod is assembled between two connecting blocks distributed along the same horizontal line.

[0019] Compared with the prior art, the present invention provides a double-layer corrugated pipe, which has the following beneficial effects.

[0020] 1. This utility model adopts a double-layer design of outer and inner corrugated pipes, combined with the annular groove and sealing ring structure of the end flange, to form double protection. The outer corrugated pipe is fixed by annular groove one, and the inner corrugated pipe is fixed by annular groove two. Both are further reinforced by welding or gluing. The sealing ring is made of water-swellable rubber material, which expands when in contact with liquid to enhance sealing performance and effectively prevent high-pressure fluid leakage.

[0021] 2. This utility model, through the multi-layer composite structure of the outer corrugated pipe, including a base layer, an impact-resistant layer, a waterproof layer, and a corrosion-resistant layer, can further improve the impact resistance, waterproofness, and corrosion resistance of the pipeline, ensuring long-term stable operation under high pressure or harsh environments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall front view of the present invention;

[0023] Figure 2 This is a side view of the overall structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the internal structure proposed in this utility model;

[0025] Figure 4 This is an enlarged schematic diagram of point A proposed in this utility model;

[0026] Figure 5 This is a schematic diagram of the shape of the sealing ring proposed in this utility model;

[0027] Figure 6 This is a schematic diagram of the outer corrugated pipe structure proposed in this utility model.

[0028] In the diagram: 1. End flange; 11. Flange hole; 12. Annular groove one; 13. Outer bellows; 14. Annular groove two; 15. Inner bellows; 16. Sealing ring one; 17. Sealing groove one; 18. Sealing groove two; 19. Sealing ring two; 1001. Channel; 1301. Base layer; 1302. Impact-resistant layer; 1303. Waterproof layer; 1304. Corrosion-resistant layer; 2. Sandwiched pipe; 21. Insulation layer; 3. Connecting block; 31. Reinforcing rod. Detailed Implementation

[0029] 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.

[0030] Example:

[0031] Please see Figure 1 - Figure 6 In this embodiment, a double-layer corrugated pipe includes an end flange 1. The surface of the end flange 1 is provided with a plurality of flange holes 11 penetrating its interior. The plurality of flange holes 11 are equidistantly distributed in a ring along the surface of the end flange 1. An outer corrugated pipe 13 and an inner corrugated pipe 15 are respectively provided between the end flanges 1 distributed on both sides. The outer corrugated pipe 13 surrounds the outside of the inner corrugated pipe 15. By setting the outer corrugated pipe 13 and the inner corrugated pipe 15, the effect of a double-layer pipe can be achieved, and no damage or breakage will occur when subjected to high pressure impact.

[0032] The surface of the end flange 1 is provided with annular groove 12 and annular groove 14 respectively. The end of the outer bellows 13 is inserted into the annular groove 12 and the end of the inner bellows 15 is inserted into the annular groove 14. The annular groove 12 and the outer bellows 13 can be used to achieve a stable connection with the end flange 1. The annular groove 14 and the inner bellows 15 can be used to achieve a stable connection with the end flange 1.

[0033] A sealing groove 17 is also provided on the inner wall of the annular groove 12. The sealing groove 17 is filled with a sealing ring 16. The inner wall of the sealing ring 16 is in close contact with the outer wall of the outer bellows 13. A sealing groove 18 is provided on the inner wall of the annular groove 14. The sealing groove 18 is filled with a sealing ring 19. The inner wall of the sealing ring 19 is in close contact with the outer wall of the inner bellows 15. Both the sealing groove 17 and the sealing groove 18 are annular structures. Both the sealing ring 16 and the sealing ring 19 are made of water-swellable rubber material. The sealing rings can perform a tight sealing process on the corresponding bellows after they are installed with the end flange 1. After the bellows is initially connected with the end flange 1, it will be fixed at its connection position by welding or gluing.

[0034] The end flange 1 has a channel 1001 at its center. The channel 1001 has a tapered structure. The wide opening of the channel 1001 fits into the inner wall of the inner bellows 15. The tapered surface of the channel 1001 can ensure that the fluid can be guided more smoothly when it passes through and comes into contact with the end flange 1.

[0035] The outer corrugated pipe 13 includes a base layer 1301, an impact-resistant layer 1302, a waterproof layer 1303, and a corrosion-resistant layer 1304. The surface of the base layer 1301 is covered with the impact-resistant layer 1302, the surface of the impact-resistant layer 1302 is covered with the waterproof layer 1303, and the surface of the waterproof layer 1303 is covered with the corrosion-resistant layer 1304.

[0036] The base layer 1301 is made of stainless steel. Both the inner and outer parts of the base layer 1301 are corrugated. Its main function is to provide the basic shape and structural support of the bellows, ensuring its stability and reliability when subjected to internal pressure and external load. In addition, the base layer 1301 also determines the flexibility and bending performance of the bellows, enabling it to adapt to various complex installation environments.

[0037] The impact-resistant layer 1302 is made of modified polyurethane material and has a thickness of 0.5-1.2mm. It can effectively absorb and disperse external impact forces, preventing the bellows from cracking or deforming when it is impacted. In addition, the impact-resistant layer 1302 can also improve the wear resistance of the bellows and extend its service life.

[0038] The waterproof layer 1303 is made of polyvinyl chloride membrane material. Several protrusions are distributed on both the inner and outer surfaces of the waterproof layer 1303, which can effectively block the intrusion of rainwater, moisture and other liquids, keep the inside of the corrugated pipe dry and clean. In addition, the waterproof layer 1303 can also improve the weather resistance of the corrugated pipe and prevent it from aging or cracking when exposed to harsh environments for a long time.

[0039] The corrosion-resistant layer 1304 is made of epoxy resin material and has a thickness of 0.2-0.5mm. It can effectively prevent chemical substances from corroding the bellows and extend its service life. In addition, the corrosion-resistant layer 1304 can also improve the high-temperature resistance of the bellows, enabling it to work normally in high-temperature environments.

[0040] The outer corrugated pipe 13 and the inner corrugated pipe 15 are filled with a sandwich pipe 2. The sandwich pipe 2 has a hollow structure and is filled with a heat insulation layer 21. The sandwich pipe 2 is made of plastic material and the heat insulation layer 21 is made of sponge material. By adding the sandwich pipe 2 and the heat insulation layer 21, a stable heat insulation effect can be achieved when conveying gases or fluids that need to be kept warm.

[0041] Among them, several connecting blocks 3 are fixedly distributed on the surface of the end flange 1. A reinforcing rod 31 is assembled between two connecting blocks 3 distributed along the same horizontal line. The reinforcing rod 31 can be used according to actual needs. When it is necessary to ensure that the corrugated pipe is straight, the entire pipe can be supported by installing the reinforcing rod 31.

[0042] The working principle of the above embodiments is as follows:

[0043] In use, the core working principle of the double-layer corrugated pipe is based on its unique double-layer structural design (outer corrugated pipe 13 and inner corrugated pipe 15) and multi-stage sealing system. When the pipeline is subjected to high-pressure fluid impact, the outer corrugated pipe 13 acts as the first protective layer, and its impact-resistant layer 1302 (modified polyurethane) can absorb and disperse external stress to prevent the pipe body from deforming or breaking. At the same time, the inner corrugated pipe 15 acts as the second protective layer to ensure stable fluid flow inside. The dual structure together enhances the overall pressure resistance.

[0044] The sealing performance is achieved through the annular groove 12 and annular groove 14 on the end flange 1. The ends of the outer bellows 13 and the inner bellows 15 are respectively embedded in the corresponding grooves, and dynamic sealing is achieved through sealing ring 16 and sealing ring 29 (water-swellable rubber). When the pipeline is subjected to fluid pressure, the sealing ring expands when it comes into contact with water, further tightly adhering to the outer wall of the bellows to prevent leakage. In addition, the conical structure of the channel 1001 optimizes fluid guidance, reduces turbulence and pressure loss, and ensures efficient fluid transmission.

[0045] The double-layer corrugated pipe has a sandwiched pipe 2 between the inner and outer layers, and the inside is filled with a sponge insulation layer 21 to form a heat insulation barrier. When transporting high-temperature or low-temperature media, the insulation layer 21 can effectively slow down heat loss or external heat intrusion and maintain fluid temperature stability. The lightweight design of the plastic material of the sandwiched pipe 2 ensures heat insulation performance while avoiding excessive weight increase.

[0046] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0047] 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 double-layer corrugated pipe, characterized in that: Includes an end flange (1), the surface of which is provided with a plurality of flange holes (11) penetrating its interior. The plurality of flange holes (11) are equidistantly distributed in a ring along the surface of the end flange (1). An outer corrugated pipe (13) and an inner corrugated pipe (15) are respectively provided between the end flanges (1) distributed on both sides. The outer corrugated pipe (13) surrounds the outer corrugated pipe (15). The surface of the end flange (1) is provided with annular groove one (12) and annular groove two (14), the end of the outer corrugated pipe (13) is inserted into annular groove one (12), and the end of the inner corrugated pipe (15) is inserted into annular groove two (14). The inner wall of the first annular groove (12) is also provided with a sealing groove (17), and the interior of the sealing groove (17) is filled with a sealing ring (16). The inner wall of the sealing ring (16) is in close contact with the outer wall of the outer corrugated pipe (13). The inner wall of the second annular groove (14) is provided with a sealing groove (18), and the interior of the sealing groove (18) is filled with a sealing ring (19). The inner wall of the sealing ring (19) is in close contact with the outer wall of the inner corrugated pipe (15). Both the first sealing groove (17) and the second sealing groove (18) are annular structures. Both the first sealing ring (16) and the second sealing ring (19) are made of water-swellable rubber material.

2. The double-layer corrugated pipe according to claim 1, characterized in that: The end flange (1) has a channel (1001) at its center. The channel (1001) has a tapered structure and the wide opening of the channel (1001) fits into the inner wall of the inner bellows (15).

3. A double-layer corrugated pipe according to claim 1, characterized in that: The outer corrugated pipe (13) includes a base layer (1301), an impact-resistant layer (1302), a waterproof layer (1303), and a corrosion-resistant layer (1304). The surface of the base layer (1301) is covered with the impact-resistant layer (1302), the surface of the impact-resistant layer (1302) is covered with the waterproof layer (1303), and the surface of the waterproof layer (1303) is covered with the corrosion-resistant layer (1304).

4. A double-layer corrugated pipe according to claim 3, characterized in that: The base layer (1301) is made of stainless steel, and both the inner and outer parts of the base layer (1301) are provided with a corrugated structure.

5. A double-layer corrugated pipe according to claim 3, characterized in that: The impact-resistant layer (1302) is made of modified polyurethane material and has a thickness of 0.5-1.2 mm.

6. A double-layer corrugated pipe according to claim 3, characterized in that: The waterproof layer (1303) is made of polyvinyl chloride membrane material, and several protrusions are distributed on both the inner and outer surfaces of the waterproof layer (1303).

7. A double-layer corrugated pipe according to claim 3, characterized in that: The corrosion-resistant layer (1304) is made of epoxy resin material, and the thickness of the corrosion-resistant layer (1304) is 0.2-0.5mm.

8. A double-layer corrugated pipe according to claim 1, characterized in that: A sandwich tube (2) is provided between the outer corrugated tube (13) and the inner corrugated tube (15). The sandwich tube (2) has a hollow structure and is filled with a heat insulation layer (21). The sandwich tube (2) is made of plastic material and the heat insulation layer (21) is made of sponge material.

9. A double-layer corrugated pipe according to claim 1, characterized in that: The surface of the end flange (1) is also fixedly distributed with several connecting blocks (3), and a reinforcing rod (31) is assembled between two connecting blocks (3) distributed along the same horizontal line.

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