A connection structure of a reaming type slip-on pipe
By combining PEX pipe with PVDF plastic sliding sleeve, the problem of easy leakage of brass sleeve under temperature fluctuation or vibration environment is solved, and a lightweight and cost-reducing pipe connection structure is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU TOP AQUA FLOW CONTROL CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-08-04
AI Technical Summary
Traditional brass pipe fittings are prone to micro-gaps under temperature fluctuations or vibrations, leading to leakage risks. They are also expensive and heavy.
The system combines PEX pipe with a PVDF plastic sliding sleeve. Through the enlarged hole and the inner hole design of the sliding sleeve, a complete seal between the pipe and the fitting is achieved. The system also utilizes the excellent resilience and rigidity of PVDF plastic to replace the traditional brass sleeve.
This solution addresses the leakage problem caused by insufficient elasticity of the brass sleeve, achieving product weight reduction and lower production costs while ensuring a good seal.
Smart Images
Figure CN224592911U_ABST
Abstract
Description
Technical Field
[0001] This application relates to a pipe fitting connection structure, and more particularly to a connection structure for an expanded-hole sliding pipe fitting. Background Technology
[0002] When connecting pipes, sealing is usually achieved through mechanical sliding connection. Traditional connection methods use brass fittings. Brass has a high modulus of elasticity and poor deformation recovery ability. Especially in temperature fluctuation or vibration environments, it is easy to cause micro gaps between pipes and fittings, leading to leakage risks. Brass is an expensive non-ferrous metal material and significantly increases the overall weight of the fittings, raising logistics and construction costs. Utility Model Content
[0003] This application provides a connection structure for an expanded-hole sliding tube fitting to solve the problems existing in related technologies. The technical solution is as follows: This application provides a connection structure for an expanded-hole sliding tube fitting, including: The pipe fitting body has a connecting end; A sliding sleeve is provided on the end of the connecting pipe, and there is a gap between the sliding sleeve and the end of the connecting pipe. PEX pipe is installed in the gap between the sliding sleeve and the connecting end, with the connecting end located inside the PEX pipe and the PEX pipe located inside the sliding sleeve.
[0004] In one implementation, it further includes: Several sealing flanges are spaced apart on the pipe end. When the PEX pipe is installed on the pipe end, the sealing flanges are all in contact with the PEX pipe. Anti-detachment barbs are installed on the pipe end. When the PEX pipe is installed on the pipe end, the anti-detachment barbs are located inside the PEX pipe.
[0005] In one implementation, PEX pipes have a first state and a second state; When the PEX pipe is in the first state, the inner diameters at both ends of the PEX pipe are the same; When the PEX pipe is in the second state, the inner diameter of the PEX pipe at the end closer to the connector is greater than the inner diameter of the PEX pipe at the end furthest from the connector.
[0006] In one implementation, The outer diameter of the connector end is within the range of 13.2~13.8mm, 16.2~16.8mm, 19.5~20.1mm or 25.2~25.8mm.
[0007] In one implementation, The outer diameter of the sealing flange is one of the following: 13.2~13.8mm, 16.2~16.8mm, 19.5~20.1mm, or 25.2~25.8mm.
[0008] In one implementation, The outer diameter of the anti-slip hook is one of the following: 13.2~13.8mm, 16.2~16.8mm, 19.5~20.1mm, or 25.2~25.8mm.
[0009] In one implementation, The inner diameter of the sliding sleeve is one of the following: 16.5~17.1mm, 20.5~21.1mm, 25.1~25.7mm, or 32.3~32.9mm.
[0010] In one implementation, When the PEX pipe is in the second state, the inner diameter of the end of the PEX pipe closest to the connector end is matched with the inner diameter of the sealing flange.
[0011] In one implementation, The sliding sleeve is made of PVDF plastic.
[0012] The advantages or beneficial effects of the above technical solutions include at least the following: Before use, PEX pipes are pre-expanded using a reaming tool. After expansion, the connecting end is inserted into the PEX pipe, and then the sliding sleeve is slid in using a pushing tool. The special design of the inner hole of the sliding sleeve ensures that the connecting end is fully inserted into the PEX pipe. By using PVDF plastic instead of the traditional brass sleeve, the excellent resilience of PVDF plastic and the special design of the connecting end successfully solve the problem of insufficient elasticity of the traditional brass sleeve, which easily leads to slippage and leakage of PEX pipes during actual installation. At the same time, it also achieves product weight reduction and greatly reduces production costs.
[0013] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description
[0014] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.
[0015] Figure 1This is a structural schematic diagram of the connecting pipe fittings; Figure 2 This is an exploded view of the connecting pipe fittings; Figure 3 This is a sectional view of the connecting pipe fittings; Figure 4 This is a cross-sectional view of the PEX pipe and fittings connected together.
[0016] In the diagram: 1. Pipe body; 2. Sliding sleeve; 3. PEX pipe; 11. Connecting end; 12. Sealing flange; 13. Anti-detachment barb. Detailed Implementation
[0017] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.
[0018] Figures 1-4 This diagram illustrates a structural structure for a connection of an expanded-hole sliding tube fitting according to an embodiment of this application. Figures 1-4 As shown, the connection structure of the pipe fitting may include: Pipe body 1, with pipe end 11 on pipe body 1; Sliding sleeve 2 is provided on the connecting pipe end 11, and there is a gap between the sliding sleeve 2 and the connecting pipe end 11. PEX pipe 3 is located in the gap between the sliding sleeve 2 and the connecting end 11. The connecting end 11 is located inside the PEX pipe 3, and the PEX pipe 3 is located inside the sliding sleeve 2.
[0019] In this embodiment, the PEX pipe 3 is pre-expanded using a reaming tool before use. After the reaming is completed, the connecting end 11 is inserted into the PEX pipe 3. Then, the sliding sleeve 2 is slid by a pushing tool. The special design of the inner hole of the sliding sleeve 2 allows the connecting end 11 to be fully inserted into the PEX pipe 3. The excellent resilience and rigidity of the sliding sleeve 2 allow the inner wall of the PEX pipe 3 to wrap around the pipe body 1, thereby achieving a complete seal.
[0020] In one implementation, it further includes: A plurality of sealing flanges 12 are spaced apart on the connector end 11. When the PEX pipe 3 is installed on the connector end 11, the plurality of sealing flanges 12 are all in contact with the PEX pipe 3. Anti-detachment hook 13 is installed on the connector end 11. When the PEX pipe 3 is installed on the connector end 11, the anti-detachment hook 13 is located inside the PEX pipe 3.
[0021] In this embodiment, after the PEX pipe 3 is enlarged, the connecting end 11 is inserted into the PEX pipe 3. Then, the sliding sleeve 2 is slid by a pushing tool. The special design of the inner hole of the sliding sleeve 2 allows the connecting end 11 to be fully inserted into the PEX pipe 3. The excellent resilience and rigidity of the plastic sliding sleeve 2 make the inner wall of the PEX pipe 3 press against the sealing flange 12 and the anti-detachment barb 13 on the insertion end of the pipe fitting, thereby achieving a complete seal.
[0022] like Figures 3-4 As shown, in one embodiment, PEX pipe 3 has a first state and a second state; When PEX pipe 3 is in the first state, the inner diameters of both ends of PEX pipe 3 are the same; When PEX pipe 3 is in the second state, the inner diameter of the end of PEX pipe 3 closest to the connector 11 is greater than the inner diameter of the end of PEX pipe 3 furthest from the connector 11.
[0023] In this embodiment, the first state of the PEX pipe 3 is the unexpanded state. At this time, the inner diameters of both ends of the PEX pipe 3 are the same. When the PEX pipe 3 needs to be sleeved, the hole is expanded by the hole-expanding tool so that the inner diameter of the end of the PEX pipe 3 closer to the connector end 11 is greater than the inner diameter of the end of the PEX pipe 3 farther away from the connector end 11. This allows the PEX pipe 3 to be sleeved on the connector end 11, and the sealing flange 12 and the anti-detachment barb 13, together with the sliding sleeve 2, press the PEX pipe 3 tightly.
[0024] like Figures 1-4 As shown, in one embodiment, The outer diameter of the connecting end 11 is within the range of 13.2~13.8mm, 16.2~16.8mm, 19.5~20.1mm or 25.2~25.8mm.
[0025] The outer diameter of the sealing flange 12 is one of the following: 13.2~13.8mm, 16.2~16.8mm, 19.5~20.1mm, or 25.2~25.8mm.
[0026] The outer diameter of the anti-slip barb 13 is within the range of 13.2~13.8mm, 16.2~16.8mm, 19.5~20.1mm or 25.2~25.8mm.
[0027] The inner diameter of the sliding sleeve 2 is one of the following: 16.5~17.1mm, 20.5~21.1mm, 25.1~25.7mm, or 32.3~32.9mm.
[0028] In this embodiment, the PEX pipe 3 achieves a perfect seal through the design of the diameter of the connecting pipe end 11, the sealing flange 12 and the anti-detachment barb 13, and the design of the inner hole of the sliding sleeve 2.
[0029] like Figure 4 As shown, in one embodiment, When the PEX pipe 3 is in the second state, the inner diameter of the end of the PEX pipe 3 near the connector end 11 is matched with the inner diameter of the sealing flange 12.
[0030] In one implementation, The sliding sleeve 2 is made of PVDF plastic.
[0031] In this embodiment, by replacing the traditional brass sleeve with a PVDF plastic sleeve, the problem of insufficient elasticity of the traditional brass sleeve, which easily leads to slippage and leakage of the PEX pipe 3 during actual installation, is successfully solved by utilizing the excellent resilience of PVDF plastic and the special design of the pipe end 11. At the same time, the product is made lighter and production costs are greatly reduced.
[0032] Specifically, PVDF plastic (polyvinylidene fluoride) does have shrinkage properties, with a shrinkage rate of approximately 2% to 3%. This value is affected by factors such as the wall thickness of the product, processing conditions (such as mold temperature, injection speed, etc.), and material flow direction.
[0033] The functions of each module in each device of this utility model embodiment can be found in the corresponding description in the above method, and will not be repeated here.
[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.
[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0036] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A connection structure for an expanded-hole sliding pipe fitting, characterized in that, include: The pipe fitting body has a connecting end; A sliding sleeve is disposed on the connecting pipe end, and there is a gap between the sliding sleeve and the connecting pipe end; The PEX pipe is disposed in the gap between the sliding sleeve and the connecting end, the connecting end being located inside the PEX pipe and the sliding sleeve.
2. The connection structure of the reamed slip-on pipe according to claim 1, wherein Also includes: A plurality of sealing flanges are spaced apart on the connector end. When the PEX pipe is installed on the connector end, the plurality of sealing flanges are all in contact with the PEX pipe. Anti-detachment hooks are provided on the connecting pipe end. When the PEX pipe is installed on the connecting pipe end, the anti-detachment hooks are located inside the PEX pipe.
3. The connection structure of the expanded-hole sliding pipe fitting according to claim 2, characterized in that, The PEX pipe has a first state and a second state; When the PEX pipe is in the first state, the inner diameters at both ends of the PEX pipe are the same; When the PEX pipe is in the second state, the inner diameter of the PEX pipe at the end closer to the connector is greater than the inner diameter of the PEX pipe at the end furthest from the connector.
4. The connection structure of the expanded-hole sliding pipe fitting according to claim 1, characterized in that, The outer diameter of the connector end is within one of the following ranges: 13.2~13.8mm, 16.2~16.8mm, 19.5~20.1mm, or 25.2~25.8mm.
5. The connection structure of the expanded-hole sliding pipe fitting according to claim 2, characterized in that, The outer diameter of the sealing flange is within the range of 13.2~13.8mm, 16.2~16.8mm, 19.5~20.1mm, or 25.2~25.8mm.
6. The connection structure of the expanded-hole sliding pipe fitting according to claim 2, characterized in that, The outer diameter of the anti-detachment hook is within the range of 13.2~13.8mm, 16.2~16.8mm, 19.5~20.1mm, or 25.2~25.8mm.
7. The connection structure of the expanded-hole sliding pipe fitting according to claim 1, characterized in that, The inner diameter of the sliding sleeve is one of the following: 16.5~17.1mm, 20.5~21.1mm, 25.1~25.7mm, or 32.3~32.9mm.
8. The connection structure of the expanded-hole sliding pipe fitting according to claim 3, characterized in that, When the PEX pipe is in the second state, the inner diameter of the end of the PEX pipe near the connector end is matched with the inner diameter of the sealing flange.
9. The connection structure of the expanded-hole sliding pipe fitting according to claim 1, characterized in that, The sliding sleeve is made of PVDF plastic.