Pipe fitting with threaded insert

Abstract

The pipe fitting with the threaded insert comprises a pipe fitting body, the insert and a blocking cover, the pipe fitting body comprises a connector part, the insert is embedded into the connector part, and the insert comprises an end face back on to the pipe fitting body; the blocking cover abuts against the end face of the insert and at least partially covers the end face of the insert. The periphery of the blocking cover is integrally connected with an outer flanging part, and the outer flanging part is embedded into the connector part. The retaining cover is mounted on the outer side of the end of the insert, the retaining cover can block the insert, mounting stability of the insert can be improved, and the insert can be effectively limited.

Description

Technical Field

[0001] This utility model relates to a pipe fitting, and more specifically, to a pipe fitting with a threaded insert. Background Technology

[0002] To achieve a sealed connection between PPR pipes, PPR fittings are required. The connection methods include heat fusion and threaded connection. In heat fusion, polypropylene is heated so that the polypropylene at both ends re-melts and bonds together after cooling. In threaded connection, one end is an internally threaded fitting and the other end is an externally threaded fitting. The tight thread fit ensures that the pipes can flow water without leaking.

[0003] Threaded PPR pipes are generally divided into three types: the first type is pure metal pipe fittings, which are expensive; the second type is pure plastic pipe fittings, whose internal threaded connection is not precise or strong enough, making them prone to leakage and thread stripping; the third type is a composite structure of metal and plastic, where plastic pipe fittings and metal threaded inserts are interlocked.

[0004] Currently, the third type of PPR pipe fitting, a composite structure of metal and plastic, can control costs and improve the strength and precision of plastic pipe fittings, and is widely used in the market. In this type, the main body of the fitting is made of PPR plastic, while the metal threaded insert is made of copper. Copper has antibacterial properties, effectively inhibiting the spread of bacteria on the inner surface of the fitting, allowing it to function normally under normal conditions. However, due to the difference in expansion coefficients between the metal insert and the main body of the fitting, the insert may loosen under significant temperature changes, leading to detachment and affecting the stability and strength of the pipe connection, potentially causing leaks.

[0005] Therefore, a new solution is needed to address this problem. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a pipe fitting with a threaded insert.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A pipe fitting with a threaded insert includes a pipe fitting body, an insert, and a cover. The pipe fitting body includes an interface portion, and the insert is embedded in the interface portion. The insert includes an end face facing away from the pipe fitting body. The cover presses against the end face of the insert and at least partially covers the end face of the insert. An outwardly flanged portion is integrally connected to the outer circumference of the cover, and the outwardly flanged portion is embedded in the interface portion.

[0009] The present invention is further configured such that a flared portion is formed on the side of the outwardly flanged portion facing away from the cover, and the flared portion gradually widens in the direction facing away from the cover; the flared portion is embedded in the body of the pipe fitting.

[0010] The present invention is further configured such that a stepped groove is formed on the outer periphery of the end face, and the inner periphery of the cover is embedded in the stepped groove.

[0011] The present invention is further configured such that the stepped groove includes a stepped surface, the stepped surface faces away from the pipe body, and the cover abuts against the stepped surface.

[0012] The present invention is further configured such that the stepped groove includes an annular outer peripheral surface, and the cover is nested on the outer periphery of the outer peripheral surface.

[0013] The present invention is further configured such that an inner flange portion is integrally connected to the inner circumference of the cover, and the inner flange portion is sleeved on the inner circumference of the insert.

[0014] The present invention is further configured such that a stepped groove II is formed on the end face corresponding to the inner circumferential position of the insert, and the inner flange portion is embedded in the stepped groove II; the stepped groove II includes an inner circumferential surface, and the inner flange portion and the inner circumferential surface are nested together.

[0015] The present invention is further configured such that the stepped groove two also includes an annular groove facing away from the pipe body, and a portion of the inner flange is embedded in the annular groove.

[0016] The present invention is further configured such that the outer circumference of the insert is integrally connected with a plurality of annular protrusions, the protrusions being embedded in the tube body.

[0017] The present invention is further configured such that a plurality of protrusions are fixedly connected to one end of the insert away from the end face, and each protrusion is arranged in a ring.

[0018] In summary, this utility model has the following beneficial effects:

[0019] By installing a stop cap on the outer side of the insert's end, the stop cap can block the insert, improving its installation stability. Furthermore, an outwardly flanged portion is fixedly connected to the outer periphery of the end cap, allowing it to embed into the pipe body and securely connect with it, effectively blocking and limiting the insert. Additionally, a flared portion is formed at the end of the outwardly flanged portion away from the end cap, creating a gradually expanding structure. After the flared portion is pre-embedded in the pipe body, it forms a structure that is larger inside and smaller outside, preventing the outwardly flanged portion and the flared portion from loosening, further enhancing the stability of the stop cap itself, and thus effectively restricting the insert.

[0020] In addition, the cover can also block and restrict the exposed part of the end face of the insert, which can reduce the formation of patina, reduce the adverse effects of patina formation, improve the aesthetics, and extend the normal service life of the fitting to a certain extent. Attached Figure Description

[0021] Figure 1 This is a perspective view of a pipe fitting with a threaded insert in this embodiment;

[0022] Figure 2 This is a side view of a pipe fitting with a threaded insert in this embodiment;

[0023] Figure 3 for Figure 2 Sectional view at point AA;

[0024] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is a front view of the first structure of the insert and cover in this embodiment;

[0026] Figure 6 This is a cross-sectional view of the first structure of the insert and cover in this embodiment;

[0027] Figure 7 for Figure 6 Enlarged view at point B in the middle;

[0028] Figure 8 This is a front view of the second structure of the insert and cover in this embodiment;

[0029] Figure 9 This is a cross-sectional view of the second structure of the insert and cover in this embodiment;

[0030] Figure 10 for Figure 9 Enlarged view at point C;

[0031] Figure 11 This is a partial disassembly diagram of the second structure of the insert and cover in this embodiment.

[0032] Reference numerals: Pipe body 1; Interface part 11; Insert 2; Thread 21; Protrusion 1 22; Annular groove 221; Protrusion 23; Notch 231; End face 24; Stepped groove 1 25; Stepped surface 1 251; Outer peripheral surface 252; Stepped groove 2 26; Stepped surface 2 261; Inner peripheral surface 262; Annular groove 263; Cover 3; Outer flange 31; Flared part 32; Inner flange 33. Detailed Implementation

[0033] 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.

[0034] This embodiment describes a pipe fitting with a threaded insert, referring to... Figures 1-4 As shown, the fitting includes a pipe body 1, an insert 2, and a cover 3. The pipe body 1 is a PPR pipe fitting and includes an interface portion 11. The insert 2 is made of copper and is embedded in the interface portion 11, serving as the interface for pipe connection. A thread 21 is machined into the inner circumference of the insert 2 to facilitate threaded pipe connection. The insert 2 includes an end face 24, which faces away from the pipe body 1.

[0035] An outwardly flanged portion 31 is integrally connected to the outer circumference of the cover 3, and the outwardly flanged portion 31 is embedded into the interface portion 11 of the pipe body 1. The cover 3 presses against the end face 24 of the insert 2, and can at least partially cover the end face 24 of the insert 2. The cover 3 is made of stainless steel, which is not easy to rust, and can eliminate or reduce the exposed part of the copper insert 2 outside the pipe, thereby reducing the formation of patina and reducing the adverse effects of patina formation.

[0036] The cover 3 can block and limit the end face 24 of the insert 2, thereby preventing the insert 2 from becoming loose, thus improving the installation stability of the insert 2 and the pipe body 1, and making it less likely to fall off or rotate loose.

[0037] Reference Figure 3 , Figure 4 As shown, a flared portion 32 is formed on the side of the outward-flared edge 31 facing away from the cover 3. The flared portion 32 gradually widens in the direction away from the cover 3, forming an internal inverted structure. The flared portion 32 is embedded in the pipe body 1, forming a larger internal diameter and a smaller diameter near the outer side. After the flared portion 32 of the outward-flared edge 31 is embedded in the pipe body 1, it can form a barrier at the flared portion 32, making it more secure and preventing the cover 3 from loosening outward. This improves the structural stability of the cover 3 and can stably and effectively apply an axial blocking force to the insert 2.

[0038] Furthermore, to enhance the stability of the connection between the insert 2 and the pipe body 1, several annular protrusions 22 are integrally connected to the outer circumference of the insert 2, and corresponding annular grooves 221 are formed between adjacent annular protrusions 22. When the insert 2 is inserted into the pipe body 1, the protrusions 22 are embedded into the pipe body 1, and the material of the pipe body 1 is also embedded into the annular grooves 221, thereby enabling the pipe body 1 and the insert 2 to form a mutually fitting structure, thus achieving a strong and stable connection. Moreover, the annular protrusions 22 can form a barrier on the outer circumference, especially enhancing the axial installation stability of the insert 2 and preventing the insert 2 from loosening.

[0039] In addition, a number of protrusions 23 are fixedly connected to the end of the insert 2 away from the end face 24. The protrusions 23 are arranged in a ring, and a notch 231 is formed between adjacent protrusions 23. When the insert 2 is inserted into the pipe body 1, the protrusions 23 are embedded into the pipe body 1, and part of the material of the pipe body 1 is also embedded into the notch 231, forming a mutually interlocking structure, which can form a joint strength and stability. Moreover, the ring-shaped protrusions 23 can form a blocking limit for axial rotation, thereby further improving the joint firmness of the insert 2. The dual limitation of axial movement and axial rotation makes it difficult for the insert 2 to detach or rotate.

[0040] In this embodiment, the mating structure of the insert 2 and the cover 3 is of two types. In the first type, the cover 3 can partially cover the end face 24 of the insert 2, as shown in the figure. Figures 5-7 As shown; the second type, the cover 3 can completely cover the end face 24 of the insert 2, as shown in the figure. Figures 8-11 As shown.

[0041] In this embodiment, refer to Figures 5-7 As shown, a stepped groove 25 is provided on the outer periphery of the end face 24. The stepped groove 25 is located on the outer periphery of the end face 24. The inner periphery of the cover 3 can be embedded in the stepped groove 25. On the one hand, it can form a block on the end face 24 of the insert 2. After the cover 3 is embedded in the stepped groove 25, it can also maintain the position of the cover 3 stably and position the cover 3.

[0042] Furthermore, the stepped groove 25 has a stepped surface 251 and an outer peripheral surface 252. The stepped surface 251 faces away from the pipe body 1, and the outer peripheral surface 252 faces outward. After installation, the cover 3 abuts against the stepped surface 251, thereby applying a pressing force to the stepped surface 251 and limiting the position of the insert 2, protecting the structural positional stability of the insert 2. The inner peripheral dimension of the cover 3 matches the dimension of the outer peripheral surface 252. After installation, the cover 3 is nested around the outer peripheral surface 252, thus defining the position of the axis between the cover 3 and the insert 2.

[0043] In this embodiment, refer to Figures 8-11 As shown, an inner flange 33 is integrally connected to the inner circumference of the cover 3, and the orientation of the inner flange 33 is the same as that of the outer flange 31. The inner flange 33 is fitted onto the inner circumference of the insert 2. After installation, the cover 3 can directly abut against the end face 24 of the insert 2. The outer flange 31 can form a fitting limit on the outer circumference, and the inner flange 33 can form a fitting limit on the outer circumference, thereby improving the connection stability of the cover 3, the insert 2, and the pipe body 1.

[0044] The end face 24 of the insert 2 can be embedded into the annular groove formed between the outer flange 31 and the inner flange 33; the cover 3 can completely cover the end face 24 of the insert 2, so that the end face 24 of the insert 2 will not be exposed, thereby eliminating the effect of copper insert 2 being exposed and forming patina.

[0045] Reference Figure 10 , Figure 11 As shown, the end face 24 has a stepped groove 26 corresponding to the inner circumference of the insert 2. The inner flange 33 is embedded in the stepped groove 26, thereby improving the nesting stability between the inner flange 33 and the insert 2. The stepped groove 26 includes an inner circumferential surface 262. The inner flange 33 and the inner circumferential surface 262 are nested together, which can improve the installation strength.

[0046] Furthermore, the stepped groove 26 also includes a stepped surface 261 facing away from the pipe body 1, and an annular groove 263 is opened at the stepped surface 261. Part of the inner flange 33 is embedded in the annular groove 26, which can improve the bonding strength between the inner flange 33 and the insert 2, and can more stably limit the insert 2, improve the installation firmness of the insert 2, and prevent the insert 2 from becoming loose.

[0047] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A threaded insert for a pipe fitting, characterized in that, The utility model provides a pipe fitting, which comprises a pipe fitting body (1), an insert (2) and a cover (3), the pipe fitting body (1) comprises an interface part (11), the insert (2) is embedded in the interface part (11), and the insert (2) comprises an end face (24) facing away from the pipe fitting body (1); the cover (3) is pressed against the end face (24) of the insert (2) and covers the end face (24) of the insert (2) at least partially; an outer flange (31) is integrally connected to the periphery of the cover (3), and the outer flange (31) is embedded in the interface part (11).

2. The threaded insert pipe fitting of claim 1, wherein, An expanding part (32) is formed on the side of the outer flange (31) facing away from the cover (3), and the expanding part (32) gradually expands in the direction facing away from the cover (3); the expanding part (32) is embedded in the pipe fitting body (1).

3. The threaded insert of claim 1, wherein, A stepped groove (25) is formed in the periphery of the end face (24), and the inner periphery of the cover (3) is embedded in the stepped groove (25).

4. The threaded insert of claim 3, wherein, The stepped groove (25) comprises a stepped surface (251), the stepped surface (251) faces away from the pipe fitting body (1), and the cover (3) abuts against the stepped surface (251).

5. The threaded insert of claim 3, wherein, The stepped groove (25) comprises an annular peripheral surface (252), and the cover (3) is nested on the periphery of the peripheral surface (252).

6. The threaded insert of claim 1, wherein, An inner flange (33) is integrally connected to the inner periphery of the cover (3), and the inner flange (33) is sleeved on the inner periphery of the insert (2).

7. The threaded insert of claim 6, wherein, A stepped groove (26) is formed in the end face (24) corresponding to the position of the inner periphery of the insert (2), and the inner flange (33) is embedded in the stepped groove (26); the stepped groove (26) comprises an inner peripheral surface (262), and the inner flange (33) and the inner peripheral surface (262) are nested with each other.

8. The threaded insert of claim 7, wherein, The stepped groove (26) further comprises an annular groove (263) facing away from the pipe fitting body (1), and part of the inner flange (33) is embedded in the annular groove (263).

9. The threaded insert of claim 1, wherein, A plurality of annular protrusions (22) are integrally connected to the periphery of the insert (2), and the protrusions (22) are embedded in the pipe fitting body (1).

10. The threaded insert of claim 1, wherein, A plurality of protrusions (23) are fixedly connected to the end of the insert (2) facing away from the end face (24), and the protrusions (23) are annularly distributed.

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