Pipe with compression-resistant layer

Abstract

The utility model provides a pipe with a compression-resistant layer. The pipe comprises an inner pipe, the inner pipe is sleeved with the corrugated outer pipe, the corrugated outer pipe is provided with a plurality of wave crests arranged at intervals in the axis direction of the inner pipe, the top end of each wave crest is provided with an inner concave part, and the bottom end of each inner concave part is connected with the inner pipe. According to the pipe with the compression-resistant layer, the inner pipe is arranged, the corrugated outer pipe is arranged on the outer side of the inner pipe in the sleeved mode, the multiple wave crests arranged on the corrugated outer pipe at intervals in the axis direction of the inner pipe can buffer pressure when the corrugated outer pipe is pressed by an external machine, the inner concave portions on the wave crests can abut against the outer wall of the inner pipe, and therefore the compression-resistant layer is formed. The contact area of the corrugated outer pipe and the inner pipe can be increased, and connection looseness of the inner pipe and the corrugated outer pipe caused by vibration or pressure in the working process can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline transportation, and in particular relates to a pipe with a pressure-resistant layer. Background Art

[0002] Pipes are the materials used to make pipe fittings, and their quality directly determines the quality and performance of the fittings. Pipes are widely used in construction projects, power plants, chemical plants, and other fields. Different types of pipes are suitable for different environments and requirements.

[0003] In the prior art, in the manufacturing process of pipes with a pressure-resistant layer, the pipes are usually composed of an outer pipe of the pressure-resistant layer and an inner pipe. The outer pipe of the pressure-resistant layer is usually a ring-shaped outer pipe of the pressure-resistant layer. [1] However, when the outer pipe of the pressure-resistant layer and the inner pipe are connected, the connection between the outer pipe of the pressure-resistant layer and the inner pipe is not tight. During operation, the connection between the outer pipe of the pressure-resistant layer and the inner pipe is easily loosened due to the vibration of the bottom surface, slight changes in the stratum, and vibrations caused by the conveying materials. The pipes have poor adaptability and poor practicality. Utility Model Content

[0004] The embodiment of the utility model provides a pipe with a pressure-resistant layer, which aims to solve the problem that the connection between the outer pipe and the inner pipe of the pressure-resistant layer is easily loosened in the existing pipe with a pressure-resistant layer.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide a pipe with a pressure-resistant layer, comprising:

[0006] inner tube;

[0007] The corrugated outer tube is sleeved on the inner tube. The corrugated outer tube has a plurality of wave crests spaced apart along the axial direction of the inner tube. The top of each wave crest is provided with an inner concave portion, and the bottom end of the inner concave portion is connected to the inner tube.

[0008] In a possible implementation manner, the cross-section of each of the inner recesses is trapezoidal.

[0009] In a possible implementation, the corrugated outer tube further has a plurality of wave troughs spaced apart along the axial direction of the inner tube, and each of the wave troughs is disposed between two adjacent wave peaks.

[0010] In a possible implementation, each of the troughs on the corrugated outer tube is connected to the outer wall of the inner tube.

[0011] In a possible implementation, connecting pipes are provided at both ends of the corrugated outer tube, and the inner wall of the connecting pipe abuts against the outer wall of the inner tube.

[0012] In a possible implementation, the two connecting pipes are integrally connected to the corrugated outer pipe.

[0013] In a possible implementation, each of the wave crests and each of the wave troughs are integrally connected.

[0014] In this implementation, compared with the prior art, an inner tube is provided, and a corrugated outer tube is sleeved on the outside of the inner tube. The multiple wave crests on the corrugated outer tube are arranged at intervals along the axial direction of the inner tube, which can buffer the pressure when the corrugated outer tube is subjected to external pressure. The inner concave portion on each of the wave crests can abut against the outer wall of the inner tube, thereby increasing the contact area between the corrugated outer tube and the inner tube, and avoiding the loosening of the connection between the inner tube and the corrugated outer tube due to vibration or pressure during the working process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic cross-sectional view of a pipe with a pressure-resistant layer provided in an embodiment of the present invention;

[0016] Figure 2 for Figure 1 The cross-sectional structure diagram of the pipe with a pressure-resistant layer provided is a cross-sectional structure diagram at AA;

[0017] Description of reference numerals:

[0018] 10. Inner tube; 20. Corrugated outer tube; 21. Wave crest; 211. Inner recess; 22. Wave trough; 23. Connecting tube. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] Please also refer to Figure 1 and Figure 2 The pipe with a pressure-resistant layer provided by the present invention will now be described. The pipe with a pressure-resistant layer comprises an inner pipe 10 and a corrugated outer pipe 20. The corrugated outer pipe 20 is sleeved onto the inner pipe 10 and has a plurality of wave crests 21 spaced apart along the axis of the inner pipe 10. Each wave crest 21 has a concave portion 211 at its top, and the bottom of the concave portion 211 is connected to the inner pipe 10.

[0021] Compared with the prior art, the pipe with a pressure-resistant layer provided in this embodiment is provided with an inner tube 10, and a corrugated outer tube 20 is sleeved on the outside of the inner tube 10. The multiple peaks 21 on the corrugated outer tube 20 are arranged at intervals along the axial direction of the inner tube 10 to buffer the pressure when the corrugated outer tube 20 is subjected to external pressure. The inner recessed portion 211 on each peak 21 can abut against the outer wall of the inner tube 10, thereby increasing the contact area between the corrugated outer tube 20 and the inner tube 10, and avoiding the loosening of the connection between the inner tube 10 and the corrugated outer tube 20 due to vibration or pressure during the working process.

[0022] In some embodiments, the inner recess 211 may be formed as follows: Figure 1 The structure shown. Figure 1 , the cross section of each inner recess 211 is trapezoidal.

[0023] The cross section of the inner concave portion 211 is a trapezoid, which can be understood as the inner concave portion 211 being an annular groove on the wave crest 21 , and the cross section of the groove being a trapezoidal structure.

[0024] As a specific implementation of this embodiment, the cross section of the inner recess 211 may be a trapezoidal rectangle.

[0025] It should be explained that the wave crest 21 of the corrugated outer tube 20 can be understood as a raised circular ring on the surface, and the inner concave portion 211 can be understood as an annular groove on the raised circular ring.

[0026] In some embodiments, the corrugated outer tube 20 may be formed as follows: Figure 1 The structure shown. Figure 1 The corrugated outer tube 20 further has a plurality of troughs 22 spaced apart along the axial direction of the inner tube 10 , and each trough 22 is disposed between two adjacent peaks 21 .

[0027] The wave trough 22 can be understood as a circular ring with a concave surface, which is integrally connected with the adjacent wave crest 21 to form the corrugated outer tube 20 .

[0028] As a specific implementation of this embodiment, a bottom end of each trough 22 may be provided with an abutment surface adapted to the outer wall of the inner tube 10 .

[0029] It should be explained that each trough 22 is arranged between two adjacent crests 21 , which can be understood as a plurality of troughs 22 and a plurality of crests 21 being arranged in an alternating manner.

[0030] In some embodiments, the corrugated outer tube 20 may be formed as follows: Figure 1 The structure shown. Figure 1 The troughs 22 on the corrugated outer tube 20 are connected to the outer wall of the inner tube 10 .

[0031] The trough 22 is connected to the outer wall of the inner tube 10 to strengthen the connection stability between the corrugated outer tube 20 and the inner tube 10 .

[0032] As a specific implementation of this embodiment, a bottom end of each trough 22 may be provided with an arc surface, and the arc surface abuts against the outer wall of the inner tube 10 .

[0033] In some embodiments, the corrugated outer tube 20 may be formed as follows: Figure 1 The structure shown. Figure 1 Both ends of the corrugated outer tube 20 are provided with connecting tubes 23 , and the inner wall of the connecting tube 23 abuts against the outer wall of the inner tube 10 .

[0034] The connecting pipes 23 can be understood as sleeves respectively provided at both ends of the corrugated outer tube 20 , and the inner walls of the two connecting pipes 23 are in contact with the outer wall of the inner tube 10 .

[0035] As a specific implementation of this embodiment, both ends of the corrugated outer tube 20 are crests 21, one end of the crests 21 at both ends is connected to the corresponding trough 22, and the other end of the crests 21 at both ends is connected to two sleeves respectively.

[0036] In some embodiments, the connecting pipe 23 may be Figure 1 The structure shown. Figure 1 , the two connecting pipes 23 are integrally connected to the corrugated outer pipe 20.

[0037] The integral connection of the connecting tube 23 and the corrugated outer tube 20 can be understood as integral negative pressure molding, where the processed tube body is placed in a specific die and the outer wall of the tube body is pressed together by negative pressure.

[0038] In some embodiments, the peak 21 may be formed as follows: Figure 1 The structure shown. Figure 1 , each crest 21 and each trough 22 are connected as one body.

[0039] The integral connection of the wave crest 21 and each wave trough 22 can be understood as an integrated negative pressure forming. The negative pressure forming technology of pipes can greatly improve the forming quality while ensuring the production speed by using a vacuum system and precisely controlled production process conditions. The negative pressure forming of pipes is an existing technology and will not be elaborated here.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pipe with a pressure-resistant layer, characterized in that: include: inner tube; The corrugated outer tube is sleeved on the inner tube. The corrugated outer tube has a plurality of wave crests spaced apart along the axial direction of the inner tube. The top of each wave crest is provided with an inner concave portion, and the bottom end of the inner concave portion is connected to the inner tube.

2. The pipe with a pressure-resistant layer according to claim 1, characterized in that: The cross section of each inner recess is trapezoidal.

3. The pipe with a pressure-resistant layer according to claim 2, characterized in that: The corrugated outer tube further has a plurality of wave troughs spaced apart along the axial direction of the inner tube, and each of the wave troughs is arranged between two adjacent wave peaks.

4. The pipe with a pressure-resistant layer according to claim 3, characterized in that: Each of the troughs on the corrugated outer tube is connected to the outer wall of the inner tube.

5. The pipe with a pressure-resistant layer according to claim 1, characterized in that: Both ends of the corrugated outer tube are provided with connecting tubes, and the inner wall of the connecting tube abuts against the outer wall of the inner tube.

6. The pipe with a pressure-resistant layer according to claim 5, characterized in that: The two connecting pipes are both integrally connected to the corrugated outer pipe.

7. The pipe with a pressure-resistant layer according to claim 3, characterized in that: The wave crests and the wave troughs are integrally connected.

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