Novel electric melting pipe fitting with modified observation hole
By setting a limiting plug and an observation post in the observation hole of the electrofusion fitting, the problem of observation post ejection is solved, achieving both safety and aesthetics in the welding process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN RONGSU PIPES IND CO LTD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-04-21
AI Technical Summary
During the welding process of electrofusion fittings, the observation column inside the observation hole may be ejected, affecting safety and aesthetics.
A novel electrofusion fitting with a modified observation hole is designed, employing a structure of a limiting plug and an observation column. The limiting plug has a limiting hole and a transition section, while the observation column has a bottom section, a transition section, and a top section. The limiting section of the limiting plug blocks the top section of the observation column, preventing it from spraying out of the observation hole.
It effectively prevents the observation column from being ejected during welding, ensuring the safety and aesthetics of the welding process, and the installation of the limit plug is convenient and stable.
Smart Images
Figure CN224150418U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrofusion fittings, and in particular to a novel electrofusion fitting with a modified observation hole. Background Technology
[0002] During the welding process of electrofusion fittings, the observation post inside the observation hole will protrude from the observation hole for visual inspection of the welding status. Conventional electrofusion fittings lack proper limiting of the observation post, which may be ejected from the observation hole after being heated, resulting in a "material flipping" phenomenon, affecting safety and aesthetics. Utility Model Content
[0003] To address the aforementioned issues, this utility model provides a novel electrofusion fitting with a modified observation hole, which limits the position of the observation column to avoid affecting safety and aesthetics.
[0004] The technical solution of this utility model is as follows:
[0005] A novel electrofusion fitting with a modified observation hole includes a pipe body and an observation hole on the outer wall of the pipe body. An observation post is provided inside the observation hole, and a limiting plug is also provided inside the observation hole. A limiting hole for the observation post to pass through is formed in the middle of the limiting plug. The limiting hole includes a limiting section and a perforation section. The diameter of the limiting section gradually decreases from the bottom to the top, and the diameter of the perforation section is the same as the top diameter of the limiting section. The observation post is located in the middle of the observation hole and includes a bottom section, a transition section, and a top section. The diameter of the bottom section is larger than that of the top section, and the transition section is located between the bottom section and the top section.
[0006] In a further technical solution, the tilt angle of the limiting segment is the same as the tilt angle of the transition segment.
[0007] In a further technical solution, the bottom outer side of the limiting plug is provided with a barb, and the inner wall of the observation hole is provided with an annular groove to accommodate the barb.
[0008] In a further technical solution, the bottom annular array of the limiting plug has several slots.
[0009] In a further technical solution, the top of the observation column is spherical.
[0010] In a further technical solution, the top edge of the limiting plug is provided with an abutment ring with a diameter larger than that of the limiting hole.
[0011] The beneficial effects of this utility model are:
[0012] 1. A limiting plug is inserted into the observation hole. The limiting hole is set with a limiting section with a changing diameter, and a transition section is set for the observation column. During the welding process of the electrofusion fitting, when the observation column emerges from the observation hole, the transition section is blocked by the limiting section of the limiting plug. This allows the top section of the observation column to pass through the perforation section and emerge from the observation hole, while limiting the entire observation column to prevent it from being ejected from the observation hole, thus ensuring the safety of the welding and the aesthetics of the weld.
[0013] 2. The limiting section and the transition section can fit together and resist each other, and the force-bearing area of the observation column is large, which can achieve a relatively stable limiting effect;
[0014] 3. The barb of the limiting plug is engaged in the annular groove to prevent the limiting plug from being squeezed out by the observation column;
[0015] 4. When installing the limit plug, the barb is squeezed by the inner wall of the observation hole, and the gap can be temporarily closed until the barb enters the annular groove and then returns to its original position, making the installation of the limit plug easier. Attached Figure Description
[0016] Figure 1 This is a cross-sectional schematic diagram of the novel electrofusion fitting with modified observation hole as described in this embodiment of the utility model;
[0017] Figure 2 yes Figure 1 Enlarged view of point A in the middle;
[0018] Figure 3 This is a schematic diagram of the limiting plug described in an embodiment of the present invention.
[0019] Explanation of reference numerals in the attached figures:
[0020] 10. Pipe body; 11. Annular groove; 20. Limiting plug; 21. Limiting section; 22. Perforated section; 23. Abutment ring; 24. Barb; 25. Sealing joint; 31. Bottom section; 32. Transition section; 33. Top section. Detailed Implementation
[0021] The embodiments of this utility model will be further described below with reference to the accompanying drawings.
[0022] Example:
[0023] like Figures 1-3As shown, a novel electrofusion fitting with a modified observation hole includes a tube body 10 and an observation hole on the outer wall of the tube body 10. An observation post is provided inside the observation hole, and a limiting plug 20 is also provided inside the observation hole. A limiting hole is formed in the middle of the limiting plug 20 to allow the observation post to pass through smoothly. The top of the observation post can be shaped like a ball. The limiting hole includes a limiting section 21 and a perforated section 22. The diameter of the limiting section 21 gradually decreases from the bottom to the top. The perforated section 22 and the limiting section 21... The top diameters are the same; the observation column is located in the middle of the observation hole, including a bottom section 31, a transition section 32 and a top section 33. The bottom section 31 has a larger diameter than the top section 33. The transition section 32 is located between the bottom section 31 and the top section 33. The diameter of the lower end of the transition section 32 is the same as that of the bottom section 31, and the diameter of the top end is the same as that of the top section 33. The top edge of the limiting plug 20 can be provided with a retaining ring 23 with a diameter smaller than the limiting hole, which increases the operating area, facilitates the installation of the limiting plug 20, and also prevents the limiting plug 20 from being completely embedded in the observation hole.
[0024] The working principle of the above technical solution is as follows:
[0025] A limiting plug 20 is inserted into the observation hole. The limiting hole is equipped with a limiting section 21 with a changing diameter, and a transition section 32 is provided for the observation column. During the welding process of the electrofusion fitting, when the observation column emerges from the observation hole, the transition section 32 is blocked by the limiting section 21 of the limiting plug 20. This allows the top section 33 of the observation column to pass through the perforated section 22 and emerge from the observation hole, while simultaneously limiting the entire observation column to prevent it from being ejected from the observation hole, thus ensuring the safety of the welding and the aesthetics of the weld.
[0026] In another embodiment, the tilt angle of the limiting segment 21 may be the same as the tilt angle of the transition segment 32.
[0027] This allows the limiting section 21 and the transition section 32 to fit together and resist each other, resulting in a large force-bearing area for the observation column and achieving a relatively stable limiting effect.
[0028] In another embodiment, such as Figure 2-3 As shown, the bottom outer side of the limiting plug 20 is provided with a barb 24, and the inner wall of the observation hole is provided with an annular groove 11 to accommodate the barb 24; the bottom of the limiting plug 20 is provided with a number of slots 25 in an annular array.
[0029] The barb 24 of the limiting plug 20 is engaged in the annular groove 11 to prevent the limiting plug 20 from being squeezed out by the observation column. When installing the limiting plug 20, the barb 24 is squeezed by the inner wall of the observation hole, and the slot 25 can be temporarily closed until the barb 24 enters the annular groove 11 and then returns to its original position, making it easier to install the limiting plug 20.
[0030] The above embodiments merely illustrate specific implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.
Claims
1. A new type of electrically fused pipe fitting for manhole retrofitting, comprising a pipe body and a manhole provided on the outer wall of the pipe body, a manhole column being provided in the manhole, characterized in that, The observation hole is equipped with a limiting plug, and the limiting plug has a limiting hole in the middle for the observation column to pass through. The limiting hole includes a limiting section and a perforated section. The diameter of the limiting section gradually decreases from the bottom end to the top end, and the diameter of the perforated section is the same as the top end of the limiting section. The observation column is located in the middle of the observation hole and includes a bottom section, a transition section and a top section. The diameter of the bottom section is larger than that of the top section, and the transition section is located between the bottom section and the top section.
2. A new type of electrically fused pipe fitting for observation port retrofitting according to claim 1, characterized in that, The tilt angle of the limiting section is the same as the tilt angle of the transition section.
3. A new type of electrically fused pipe fitting for observation port retrofitting according to claim 1, characterized in that, The bottom outer side of the limiting plug is provided with a barb, and the inner wall of the observation hole is provided with an annular groove to accommodate the barb.
4. A new type of electrically fused pipe fitting for observation port retrofits as claimed in claim 3, wherein, The bottom annular array of the limiting plug has several locking slots.
5. The novel electrofusion fitting with modified observation hole according to claim 1, characterized in that, The top of the observation column is spherical.
6. A new type of electrically fused pipe fitting for observation port retrofits as claimed in claim 1, wherein, The top edge of the limiting plug is provided with a stop ring with a diameter larger than that of the limiting hole.