Double-layer bent pipe
By using a double-layer bend design, the flexible inner pipe absorbs the expansion of water as it freezes, while the outer pipe is reinforced to increase strength. This solves the problem of water pipe bends being prone to freezing and cracking at low temperatures, thus improving the reliability and durability of the bend.
Patent Information
- Application Number
- CN202423258546.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Water pipe elbows are prone to freezing and cracking in low-temperature environments, leading to pipeline system leaks and facility damage. Existing technologies are difficult to effectively prevent stress concentration caused by water freezing.
The design features a double-layered curved pipe structure, combining a flexible inner pipe with a curved outer pipe. An expansion groove is provided on the surface of the flexible inner pipe to absorb the volume expansion when water freezes. The outer pipe is reinforced to increase structural strength, and a limiting ring and a limiting groove ensure the stability of the inner pipe position.
It effectively prevents damage to bends caused by water freezing, improves the reliability and durability of bends in low-temperature environments, and avoids pipe leaks and facility damage caused by freezing and cracking.
Smart Images
Figure CN223460107U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pipe fitting technical field more specifically, it relates to a double -layer elbow. BACKGROUND
[0002] In modern building and industrial water supply and various types of pipeline systems, the water pipe elbow as indispensable connecting component, bears the role of changing water flow direction, realizing pipeline flexible layout.
[0003] When winter low temperature, water pipe elbow can become the vulnerable link of entire pipeline system easily. Since the water flow of elbow part is more turbulent than straight pipe section, the stress produced by water flow icing has radial direction and axial direction, causes pipe wall to bear huge stress concentration, therefore, in cold environment, water ice volume expansion can easily make elbow freeze in winter, brings great trouble to the normal operation of water supply system, even causes pipeline leakage, equipment damage and other serious consequences. According to the above problem, the present application is proposed. SUMMARY
[0004] In view of the deficiencies in the prior art, the utility model provides a double -layer elbow with double -layer structure, the flexible inner tube in the inside provides expansion allowance for water flow icing, prevents water flow icing damage elbow.
[0005] To achieve the above object, the utility model provides the following technical scheme: a double -layer elbow, including elbow outer tube, the elbow outer tube is provided with flexible inner tube closely combined with its inner wall, the both ends of the elbow outer tube are provided with the limiting ring, the both ends of the flexible inner tube are provided with the limiting slot, and the limiting ring and the limiting slot are connected with each other.
[0006] The utility model further sets up: the expansion slot includes first expansion slot and second expansion slot, the first expansion slot is circumferentially arranged on the outer surface of the flexible inner tube and is located at the curved portion of the flexible inner tube, and the second expansion slot is arranged along the flexible inner tube.
[0007] The utility model further sets up: the limiting ring and the limiting slot are provided with multiple groups.
[0008] The utility model further sets up: the cross section of the expansion slot is provided with V-shaped structure.
[0009] The utility model further sets up: the second expansion slot is provided with four, and four second expansion slots are equidistantly distributed on the four sides of the flexible inner tube.
[0010] The utility model further sets up: the curved portion of the elbow outer tube is provided with the reinforcing portion.
[0011] In conclusion, the utility model has the following beneficial effects:
[0012] This new design features a double-layer structure consisting of an outer elbow tube and a flexible inner tube. The inner tube has an expansion groove that deforms to absorb the volume expansion of water when it freezes, thereby preventing damage to the elbow caused by freezing. Furthermore, a reinforcement is provided to increase the strength of the outer elbow tube at the bend, further ensuring the reliability of the elbow. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the external structure of the elbow.
[0014] Figure 2 It is a schematic diagram of the external upper side structure of the elbow.
[0015] Figure 3 It is a schematic diagram of the internal cross-sectional structure of the elbow.
[0016] Figure 4 It is a schematic diagram of the front structure of the elbow mouth.
[0017] Figure numerals: 1, outer tube of the bent pipe; 2, flexible inner tube; 3, limiting ring; 4, limiting groove; 5, expansion groove; 501, first expansion groove; 502, second expansion groove; 6, reinforcement part. DETAILED DESCRIPTION
[0018] The present invention will be described in further detail below with reference to the accompanying drawings.
[0019] This embodiment discloses a double-layer elbow. Figures 1-4 As shown, the curved outer tube 1 includes a flexible inner tube 2 disposed within the curved outer tube 1, which is tightly fitted to its inner wall. Limiting rings 3 are disposed at both ends of the curved outer tube 1, and limiting grooves 4 are disposed at both ends of the flexible inner tube 2. The limiting rings 3 engage with the limiting grooves 4. Through the above structure, the limiting rings 3 and limiting grooves 4 cooperate to prevent the flexible inner tube 2 from shifting within the curved outer tube 1, particularly allowing the flexible inner tube 2 to remain within the curved portion of the curved outer tube 1. Furthermore, the limiting rings 3 and limiting grooves 4 also act as a seal, preventing water from entering the gap between the inner and outer tubes. An expansion groove 5 is disposed on the outer surface of the flexible inner tube 2. In winter or other cold weather, when the water in the pipe freezes, the ice causes the volume of the water to expand. Since the flexible inner tube 2 is made of flexible rubber material, it can undergo a certain deformation. At the same time, the expansion groove 5 leaves a margin for the volume expansion caused by the freezing of water. Therefore, after freezing, the flexible inner tube 2 can absorb the expanded volume after freezing, protecting the outer tube 1 of the elbow from being frozen and damaged.
[0020] Further, refer to Figures 3-4Because the water flow in the elbow pipe is turned, when the water flow is frozen, a greater stress concentration is generated on the curved part, therefore, the expansion groove 5 has two parts, a first expansion groove 501 and a second expansion groove 502, the first expansion groove 501 is circumferentially arranged on the outer surface of the flexible inner pipe 2 and located at the curved part of the flexible inner pipe 2, mainly to leave a greater deformation allowance for the expansion of the curved part, and the second expansion groove 502 is arranged along the flexible inner pipe 2 and leaves a deformation allowance for the overall expansion after the water flow is frozen.
[0021] Further, the limiting ring 3 and the limiting groove 4 are provided with multiple groups, in the embodiment, two groups of the limiting ring 3 and the limiting groove 4 are arranged at each end to ensure stable clamping, and the number can be flexibly adjusted according to actual needs, and when the size of the elbow pipe is larger, the adaptability can be increased.
[0022] Further, the cross section of the expansion groove 5 is provided with a V-shaped structure. The V-shaped structure has a good elastic recovery force while retaining a good expansion allowance, and the expansion groove 5 can be well restored to the initial state after the ice melts.
[0023] Further, referring to Figure 4 , the second expansion groove 502 is provided with four, and the four second expansion grooves 502 are equidistantly distributed on the four sides of the flexible inner pipe. The four second expansion grooves 502 well bear the expansion volume in all directions when the water flow is frozen, and have a good protection effect to prevent damage to the outer pipe of the elbow pipe.
[0024] Further, referring to Figures 1-2 , the curved part of the elbow pipe outer pipe 1 is provided with a reinforcing part 6. The reinforcing part 6 is a triangular structure on the inner side of the curved part and a reinforcing edge on the outer side of the curved part. By arranging the reinforcing part 6, the structural strength of the elbow pipe outer pipe 1 is increased, and the internal flexible inner pipe will not cause damage to the pipe body when the water flow is frozen.
[0025] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. within the design concept of the present application shall be included in the protection scope of the present application.
Claims
1. A double-layered elbow comprising an outer elbow pipe (1), characterized in that: The flexible inner tube (2) is tightly attached to the inner wall of the elbow outer tube (1), the two ends of the elbow outer tube (1) are provided with limiting rings (3), the two ends of the flexible inner tube (2) are provided with limiting grooves (4), and the limiting rings (3) and the limiting grooves (4) are clamped and matched.
2. A double layer elbow according to claim 1, characterized in that: The expansion groove (5) comprises a first expansion groove (501) and a second expansion groove (502), the first expansion groove (501) is circumferentially arranged on the outer surface of the flexible inner tube (2) and located at the bending part of the flexible inner tube (2), and the second expansion groove (502) is arranged along the flexible inner tube (2).
3. A double layer elbow according to claim 1, characterized in that: The limiting ring (3) and the limiting groove (4) are provided with multiple groups.
4. A double layer elbow according to claim 1, characterized in that: The cross section of the expansion groove (5) is provided with a V-shaped structure.
5. A double layer elbow according to claim 2, characterized in that: The second expansion groove (502) is provided with four, and the four second expansion grooves (502) are equidistantly distributed on the four sides of the flexible inner tube.
6. A double layer elbow according to claim 1, characterized in that: The bending part of the elbow outer tube (1) is provided with a reinforcing part (6).