A drain pipe bend
By designing a three-dimensional structure for the drainage pipe elbow, the problem of easy clogging of ordinary right-angle elbows is solved, which improves fluid flow rate and enhances structural stability, thereby reducing the risk of clogging.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI HUIFENG PLASTIC PIPE
- Filing Date
- 2025-05-26
- Publication Date
- 2026-06-19
AI Technical Summary
In existing technologies, ordinary right-angle elbows are prone to clogging when connecting two mutually perpendicular horizontal drainage pipes, affecting drainage efficiency and service life.
Design a three-dimensional drainage pipe elbow, including elbow one, elbow two and transition pipe. Elbow one and elbow two are vertically distributed in space, and the transition pipe is arranged vertically to form a height difference, optimize fluid flow characteristics, and provide an inspection port at the bend for easy cleaning.
It increases fluid flow rate, reduces flow resistance, lowers the risk of clogging, enhances sealing and structural stability, and expands functionality.
Smart Images

Figure CN224380968U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drainage pipe technology, specifically a drainage pipe elbow. Background Technology
[0002] Drainage pipes are piping systems used to discharge wastewater, rainwater, and other liquids. Their design and installation methods directly affect drainage efficiency, durability, and maintenance costs. Drainage pipes are widely used for domestic sewage discharge, rainwater discharge, and industrial wastewater discharge. Drainage pipes require not only straight pipes but also various connectors; elbows are key pipe connectors in drainage piping systems for changing the direction of water flow.
[0003] In practical use, when two horizontally distributed drainage pipes that are perpendicular to each other are connected by a regular right-angle elbow, the water flow resistance is high at the bend, which can easily trap debris and cause blockages. Therefore, improving the drainage pipe elbow can improve drainage efficiency, reduce the risk of blockages, extend service life, and facilitate maintenance. Utility Model Content
[0004] The purpose of this utility model is to provide a drain pipe elbow that solves the problem of easy blockage when ordinary right-angle elbows are used to connect two mutually perpendicular horizontal drain pipes.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a drainage pipe elbow, comprising an elbow pipe with both ends connected between two mutually perpendicularly distributed horizontal pipes, the elbow pipe being a three-dimensional pipe body, the elbow pipe including an interface one, an interface two, a bend one, a bend two, and a transition pipe, the bend one and the bend two being spatially perpendicularly distributed, the interface one and the interface two being respectively located at opposite ends of the bend one and the bend two, the opposite ends of the bend one and the bend two being connected by a transition pipe, the transition pipe being a straight pipe;
[0006] The first bend is connected to the upstream horizontal pipeline through interface one, and the second bend is connected to the downstream horizontal pipeline through interface two. The horizontal pipeline connected to the first bend is distributed along the X-axis, the horizontal pipeline connected to the second bend is distributed along the Y-axis, and the transition pipe is distributed along the Z-axis.
[0007] Preferably, the elbow is a one-piece molded structure.
[0008] Preferably, the outer bend side of the first bend is provided with an integrated inspection port 1, and the inner bend side of the second bend is provided with an integrated inspection port 2. Both the first inspection port and the second inspection port are sealed by detachable end caps.
[0009] Preferably, the end cap includes a cap top, a cap body connected to the cap top, and a cap core connected to the cap top. The cap body surrounds and covers the periphery of the ports of inspection port one and inspection port two, and the cap core is inserted into the ports of inspection port one and inspection port two to seal them.
[0010] Preferably, the diameter of the first bend gradually increases from both ends toward the middle.
[0011] Preferably, the diameter of the second bend gradually increases from both ends toward the middle.
[0012] This utility model has the following beneficial effects:
[0013] This utility model incorporates an elbow pipe, which has a three-dimensional structure. Two mutually perpendicular horizontal pipes connected by the elbow pipe have a spatial height difference. The transition pipe of the elbow pipe forms this height difference. Fluid transported from the upstream horizontal pipe turns downward at one point of the elbow pipe, allowing the fluid to pass through more easily. The increased flow velocity due to the height difference allows the fluid to pass through the second elbow pipe more smoothly and be transported to the downstream horizontal pipe. Furthermore, the elbow pipe accommodates complex spatial layouts of pipelines, expanding its functionality. Attached Figure Description
[0014] Figure 1 This is a perspective view of Embodiment 1 of the present utility model;
[0015] Figure 2 This is a schematic diagram of the elbow pipe structure according to Embodiment 1 of this utility model;
[0016] Figure 3 This is a rear view of the elbow pipe according to Embodiment 1 of this utility model;
[0017] Figure 4 This is a perspective view of Embodiment 2 of the present utility model;
[0018] Figure 5 This is a schematic diagram of the elbow pipe structure in Embodiment 2 of this utility model;
[0019] Figure 6 This is a schematic diagram of the end cap structure in Embodiment 2 of this utility model.
[0020] In the diagram: 1. Horizontal pipe; 2. Elbow pipe; 21. Interface 1; 22. Interface 2; 23. Elbow 1; 231. Inspection port 1; 24. Elbow 2; 241. Inspection port 2; 25. Transition pipe; 3. End cap; 31. Top of cap; 32. Body of cap; 33. Core of cap. Detailed Implementation
[0021] 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.
[0022] Example 1:
[0023] like Figure 1-3 As shown, this embodiment provides a technical solution: a drainage pipe elbow, including an elbow pipe 2 connected at both ends between two mutually perpendicular horizontal pipes 1. The elbow pipe 2 is a three-dimensional irregular pipe body. The elbow pipe 2 is an integrally formed structure. The integral forming avoids the problems of gaps and stress concentration that may be caused by splicing process, improves the sealing performance of the pipe body, and enhances the structural strength and stability. The elbow pipe 2 includes interface 1 21, interface 22, bend 1 23, bend 24 and transition pipe 25.
[0024] The diameter of bend 1 23 gradually increases from both ends to the middle, optimizing the flow characteristics of the fluid at the bend and effectively reducing the flow resistance at the bend. The diameter of bend 24 also gradually increases from both ends to the middle, optimizing the flow characteristics of the fluid at the bend and effectively reducing the flow resistance at the bend. Both bend 1 23 and bend 24 have smooth inner wall surfaces, reducing dirt adhesion. Both bend 1 23 and bend 24 are spatially perpendicular to each other. In the entire drainage pipeline system, bend 24 is vertically distributed below bend 1 23. Interface 1 21 and interface 22 are respectively located at the opposite ends of bend 1 23 and bend 24. The opposite ends of bend 1 23 and bend 24 are connected by transition pipe 25. Transition pipe 25 is a straight pipe and is vertically distributed throughout the drainage pipeline system. Interface 1 21 and interface 22 connect to the horizontal pipe.
[0025] Bend 1 23 is connected to the upstream horizontal pipe 1 through interface 1 21, and bend 24 is connected to the downstream horizontal pipe 1 through interface 22. The horizontal pipe 1 connected to bend 1 23 is distributed along the X-axis, the horizontal pipe 1 connected to bend 24 is distributed along the Y-axis, and the transition pipe 25 is distributed along the Z-axis, forming a spatial layout that creates a height difference in fluid transport at the bend, increases the flow rate, guides fluid flow more smoothly, reduces fluid resistance, and allows for the smooth passage of debris, reducing the risk of blockage.
[0026] Example 2:
[0027] like Figure 4-6As shown, this embodiment provides a technical solution: a drainage pipe elbow, including an elbow pipe 2 connected at both ends between two mutually perpendicular horizontal pipes 1. The elbow pipe 2 is a three-dimensional irregular pipe body. The elbow pipe 2 is an integrally formed structure. The integral forming avoids the problems of gaps and stress concentration that may be caused by splicing process, improves the sealing performance of the pipe body, and enhances the structural strength and stability. The elbow pipe 2 includes interface 1 21, interface 22, bend 1 23, bend 24 and transition pipe 25.
[0028] The diameter of bend 1 23 gradually increases from both ends to the middle, optimizing the flow characteristics of the fluid at the bend and effectively reducing the flow resistance at the bend. The diameter of bend 24 also gradually increases from both ends to the middle, optimizing the flow characteristics of the fluid at the bend and effectively reducing the flow resistance at the bend. Bend 1 23 and bend 24 are spatially perpendicular to each other. That is, in the entire drainage pipeline system, bend 24 is vertically distributed below bend 1 23. Interface 1 21 and interface 22 are respectively located at the opposite ends of bend 1 23 and bend 24. The opposite ends of bend 1 23 and bend 24 are connected by transition pipe 25. Transition pipe 25 is a straight pipe and is vertically distributed in the entire drainage pipeline system. Interface 1 21 and interface 22 connect to the horizontal pipe body.
[0029] Bend 1 23 is connected to the upstream horizontal pipe 1 through interface 1 21, and bend 24 is connected to the downstream horizontal pipe 1 through interface 22. The horizontal pipe 1 connected to bend 1 23 is distributed along the X-axis, the horizontal pipe 1 connected to bend 24 is distributed along the Y-axis, and the transition pipe 25 is distributed along the Z-axis, forming a spatial layout that makes the fluid transport at the bend have a height difference, increases the flow rate, guides the fluid flow more smoothly, reduces fluid resistance, and allows for smooth passage to flush away debris and reduce the risk of blockage.
[0030] Inspection ports are provided at both bends of the elbow pipe 2. An integrated inspection port 231 is provided on the outer bend side of the first bend pipe 23, and an integrated inspection port 241 is provided on the inner bend side of the second bend pipe 24. Both the first inspection port 231 and the second inspection port 241 are sealed by a detachable end cap 3. The end cap 3 includes a cap top 31, a cap body 32 connected to the cap top 31, and a cap core 33 connected to the cap top 31. The cap body 32 surrounds the outer periphery of the ports of the first inspection port 231 and the second inspection port 241, and the cap core 33 is inserted into the inside of the ports of the first inspection port 231 and the second inspection port 241 to seal them. The end cap 3 is installed on the inspection port by the cap body 32 threadedly. The installation method is not limited to this.
[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0032] 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 drain pipe elbow, characterized in that: The device includes a bend (2) that is connected at both ends between two mutually perpendicular horizontal pipes (1). The bend (2) is a three-dimensional pipe body. The bend (2) includes an interface one (21), an interface two (22), a bend one (23), a bend two (24), and a transition pipe (25). The bend one (23) and the bend two (24) are spatially perpendicular to each other. The interface one (21) and the interface two (22) are respectively located at the opposite ends of the bend one (23) and the bend two (24). The opposite ends of the bend one (23) and the bend two (24) are connected by a transition pipe (25). The transition pipe (25) is a straight pipe. The first bend (23) is connected to the upstream horizontal pipe (1) through the first interface (21), the second bend (24) is connected to the downstream horizontal pipe (1) through the second interface (22), the horizontal pipe (1) connected to the first bend (23) is distributed along the X-axis, the horizontal pipe (1) connected to the second bend (24) is distributed along the Y-axis, and the transition pipe (25) is distributed along the Z-axis.
2. A drain pipe elbow according to claim 1, characterized in that: The elbow pipe (2) is a one-piece molded structure.
3. A drain pipe elbow according to claim 1, characterized in that: The outer side of the first bend (23) is provided with an integrated inspection port (231), and the inner side of the second bend (24) is provided with an integrated inspection port (241). Both the first inspection port (231) and the second inspection port (241) are sealed by a detachable end cap (3).
4. A drain pipe elbow according to claim 3, characterized in that: The end cap (3) includes a top cap (31), a body cap (32) connected to the top cap (31), and a core cap (33) connected to the top cap (31). The body cap (32) surrounds the ports of inspection port one (231) and inspection port two (241) and covers them. The core cap (33) is inserted into the ports of inspection port one (231) and inspection port two (241) to seal them.
5. A drain pipe elbow according to claim 1, characterized in that: The diameter of the bend (23) gradually increases from both ends toward the middle.
6. A drain pipe elbow according to claim 1, characterized in that: The diameter of the second bend (24) gradually increases from both ends toward the middle.