Outer corrugated pipe

Abstract

The utility model discloses an outer corrugated pipe which comprises a corrugated pipe assembly, an EVA corrugated outer pipe, corrugated folds, a co-extrusion layer, an inner pipe assembly, a small silica gel pipe, an EVA wrapping layer and glue. The inner tube assembly is composed of a small silica gel tube, an EVA coating layer and glue, and the outer wall of the small silica gel tube is sleeved with the EVA coating layer; the EVA small tube is added on the outer layer of the silicone tube for protection, the pressure resistance of the whole structure can be effectively improved, the EVA small tube serves as the outer layer of the silicone tube, the silicone tube can be prevented from being directly abraded and corroded by the external environment, and therefore the service life of the silicone tube is prolonged, the outer corrugated tube has certain elasticity and flexibility, and the service life of the silicone tube is prolonged. The silicone tube has good elasticity, can buffer and absorb shock to a certain extent, reduces damage to a pipeline system when the pipeline system is subjected to external impact or vibration, also has good elasticity, can further absorb and disperse impact energy, and protects the stability and safety of the pipeline system.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows, in particular to an outer bellows. Background Art

[0002] External bellows refers to a pipe with a series of parallel or specific shaped corrugations or folds on its outer surface; this design enables the pipe to have a certain degree of elasticity and flexibility when subjected to force. The structure of the external bellows is generally composed of an inner pipe body and an outer corrugation; the inner pipe body can be made of metal, plastic or other materials and is used to transport media; the outer corrugation enhances the flexibility and pressure-bearing capacity of the pipe.

[0003] When the internal water pressure of the silicone tube inside the outer bellows exceeds 20 kPa, water may flow back. The existing internal silicone tube has poor pressure resistance and is easily directly affected by wear and corrosion from the external environment, thereby reducing the service life of the silicone tube. In addition, the integrated structure is more troublesome during local installation and maintenance. Utility Model Content

[0004] The purpose of the utility model is to provide an outer bellows to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: an outer bellows, comprising a bellows assembly and an inner tube assembly, the inner tube assembly being composed of a small silicone tube, an EVA coating layer and glue, the outer wall of the small silicone tube being sleeved with the EVA coating layer, and the outer wall of the EVA coating layer being fixedly connected with glue.

[0006] As a further technical solution of the utility model, a second through hole is opened on the outer wall of one side of the silicone tube.

[0007] As a further technical solution of the utility model, the bellows assembly consists of an EVA corrugated outer tube, corrugated folds, a co-extruded layer and corrugated grooves, and the inner tube assembly is arranged in the EVA corrugated outer tube.

[0008] As a further technical solution of the utility model, a first through hole is opened on the EVA corrugated outer tube, and glue is fixedly connected to the inner wall of the first through hole at a position corresponding to the inner tube assembly.

[0009] As a further technical solution of the utility model, corrugated folds are arranged on the outer wall of the EVA corrugated outer tube.

[0010] As a further technical solution of the utility model, a co-extrusion layer is provided on the outer wall of the EVA corrugated outer tube at the position corresponding to the corrugated folds.

[0011] As a further technical solution of the present utility model, a corrugated groove is provided at a position corresponding to the corrugated fold on the inner wall of the first through hole.

[0012] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows: By adding an EVA small tube to the outer layer of the silica gel tube for protection, the present utility model can effectively improve the pressure resistance of the entire structure. Moreover, as the outer layer of the silica gel tube, the EVA small tube can prevent the silica gel tube from being directly worn and corroded by the external environment, thereby extending the service life of the silica gel tube. The outer corrugated tube has certain elasticity and flexibility, which can buffer and shock-absorb to a certain extent, reducing the damage of the pipeline system when subjected to external impacts or vibrations. The silica gel tube also has good elasticity, which can further absorb and disperse the impact energy, protecting the stability and safety of the pipeline system. This multi-layer structure is relatively simple to install, only requiring assembling the layers of pipes in sequence. At the same time, it is also easier to inspect and replace damaged components during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0015] Figure 2 is a front structural schematic diagram of the present utility model;

[0016] Figure 3 is a front sectional structural schematic diagram of the present utility model;

[0017] Figure 4 is Figure 3 an enlarged structural schematic diagram of area A in

[0018] Figure 5 is a side structural schematic diagram of the present utility model.

[0019] In the figure: 1. Bellows assembly; 11. EVA corrugated outer tube; 12. Corrugated fold; 13. Coextrusion layer; 14. First through hole; 15. Corrugated groove; 2. Inner tube assembly; 21. Silica gel small tube; 22. EVA coating layer; 23. Second through hole; 24. Glue. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to the attached Figure 1 - attached Figure 5 As an embodiment provided by the present utility model: an outer corrugated pipe, including a corrugated pipe assembly 1 and an inner pipe assembly 2. The inner pipe assembly 2 is composed of a silica gel small tube 21, an EVA coating layer 22, and glue 24. The EVA coating layer 22 is sleeved on the outer wall of the silica gel small tube 21, and the glue 24 is fixedly connected to the outer wall of the EVA coating layer 22; a second through hole 23 is opened on one outer wall of the silica gel small tube 21, and the silica gel small tube 21 conveys water through the second through hole 23; the corrugated pipe assembly 1 is composed of an EVA corrugated outer pipe 11, corrugated folds 12, a co-extruded layer 13, and corrugated grooves 15, and the inner pipe assembly 2 is arranged inside the EVA corrugated outer pipe 11; a first through hole 14 is opened on the EVA corrugated outer pipe 11, and the glue 24 is fixedly connected to the position corresponding to the inner pipe assembly 2 on the inner wall of the first through hole 14, and the glue 24 is used to connect the corrugated pipe assembly 1 and the inner pipe assembly 2; the corrugated folds 12 are arranged on the outer wall of the EVA corrugated outer pipe 11; the co-extruded layer 13 is arranged at the position corresponding to the corrugated folds 12 on the outer wall of the EVA corrugated outer pipe 11, and the co-extruded layer 13 is made of wear-resistant material or antistatic material, which is used to improve the wear resistance and corrosion resistance of the EVA corrugated outer pipe 11; the corrugated grooves 15 are opened at the position corresponding to the corrugated folds 12 on the inner wall of the first through hole 14, and the corrugated folds 12 and the corrugated grooves 15 together form the characteristic structure of the EVA corrugated outer pipe 11, so that the pipe can generate a certain amount of flexibility and extensibility when stressed.

[0022] Working principle: When assembling the present utility model, the corrugated pipe assembly 1 and the inner pipe assembly 2 are assembled together. First, the EVA coating layer 22 is sleeved on the silica gel small tube 21 section by section using a thermoplastic pipe. After the coating is completed, the EVA coating layer 22 together with the silica gel small tube 21 is glued to the inner wall of the first through hole 14 on the EVA corrugated outer pipe 11 using the glue 24 to complete the assembly of the corrugated pipe assembly 1 and the inner pipe assembly 2; among them, the corrugated folds 12 and the corrugated grooves 15 together form the characteristic structure of the EVA corrugated outer pipe 11, so that the pipe can generate a certain amount of flexibility and extensibility when stressed. The co-extruded layer 13 is made of wear-resistant material or antistatic material, which is used to improve the wear resistance and corrosion resistance of the EVA corrugated outer pipe 11, and the silica gel small tube 21 conveys water through the second through hole 23.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or equivalently replace some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. An outer bellows, comprising a bellows assembly (1) and an inner tube assembly (2), characterized in that: The inner tube assembly (2) is composed of a small silicone tube (21), an EVA coating layer (22) and glue (24); the EVA coating layer (22) is sleeved on the outer wall of the small silicone tube (21), and the glue (24) is fixedly connected to the outer wall of the EVA coating layer (22).

2. The outer bellows according to claim 1, characterized in that: A second through hole (23) is provided on one side outer wall of the small silicone tube (21).

3. The outer bellows according to claim 1, characterized in that: The corrugated tube assembly (1) is composed of an EVA corrugated outer tube (11), corrugated folds (12), a co-extruded layer (13) and corrugated grooves (15), and the inner tube assembly (2) is arranged in the EVA corrugated outer tube (11).

4. The outer bellows according to claim 3, characterized in that: The EVA corrugated outer tube (11) is provided with a first through hole (14), and glue (24) is fixedly connected to the inner wall of the first through hole (14) at a position corresponding to the inner tube assembly (2).

5. The outer bellows according to claim 3, characterized in that: The outer wall of the EVA corrugated outer tube (11) is provided with corrugated folds (12).

6. The outer bellows according to claim 4, characterized in that: A co-extrusion layer (13) is provided on the outer wall of the EVA corrugated outer tube (11) at a position corresponding to the corrugated folds (12).

7. The outer bellows according to claim 4, characterized in that: A corrugated groove (15) is provided on the inner wall of the first through hole (14) at a position corresponding to the corrugated fold (12).

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