A type of rust-resistant pipe fitting

Abstract

This utility model relates to the field of pipe fittings and connectors, and discloses a rust-proof pipe fitting, including a pipe fitting body and a protective section. The protective section is located at the pipe opening of the pipe fitting body, and a groove is formed in the protective section. The groove is trapezoidal in shape along the vertical cross-section of the pipe opening of the protective section. Three sets of air passages are radially formed on the end face of the pipe opening of the protective section, and the air passages communicate with the groove. This utility model uses sealing material to fill the space corresponding to the steel pipe or fitting at the pipe opening of the protective section of the pipe fitting body, which provides a sealing and protection function for the threaded connection between the fitting and the steel pipe. The sealing material is backfilled into the groove to form a barrier, reducing the generation of air bubbles and enhancing the sealing performance. Compared with traditional straight or conical protective sections, this utility model can reduce the overflow of sealing material during sealing. Furthermore, by setting the air passages, not only can air be vented outward to ensure uniform sealing, but the overflow of sealing material in the air passages can also be used to determine whether the sealing is in place.

Description

Technical Field

[0001] This utility model relates to the field of pipe fittings and connectors, and in particular to a rust-resistant pipe fitting. Background Technology

[0002] Currently, after installation, the threads connecting traditional pipe fittings and steel pipes are exposed to the external environment, making them prone to rusting due to humidity. This is especially true for outdoor installations, where rainwater and acidic or alkaline substances in the atmosphere further shorten the lifespan of the threaded connections. Furthermore, rusted or corroded connections are difficult to disassemble and replace. Therefore, it is crucial to address how to effectively seal and protect the threaded connections to prevent corrosion, extend their lifespan, and facilitate easy disassembly and replacement.

[0003] The common method is to wrap wire around the connecting threads of the steel pipe and apply solid glue to seal the entry of harmful substances into the pipe fitting. However, this method has the problem that air bubbles in the solid glue can create pores that enter the pipe fitting after the sealant dries, which can also easily corrode the pipe fitting.

[0004] Therefore, a pipe fitting that can prevent the pipe end threads from rusting and corroding is needed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a pipe fitting that can prevent the pipe end threads from rusting and corroding. It can not only seal and protect the threaded connection between the pipe fitting and the steel pipe, preventing the threaded connection between the pipe fitting and the steel pipe from being corroded by the external environment and extending the service life of the pipe fitting and the connecting steel pipe, but also facilitate the disassembly and replacement of the threaded connection between the pipe fitting and the steel pipe.

[0006] This utility model discloses a rust-proof pipe fitting, comprising a pipe fitting body and a protective section. The protective section is located at the pipe opening of the pipe fitting body, and the radial length of the protective section along the pipe opening of the pipe fitting body is 4-26mm. The outer diameter of the protective section along the vertical section of the pipe opening of the pipe fitting body is 1-4mm larger than the outer diameter of the vertical section of the pipe fitting body along the pipe opening, and the inner diameter of the protective section along the vertical section of the pipe opening of the pipe fitting body is 1-4mm larger than the inner diameter of the vertical section of the pipe fitting body along the pipe opening.

[0007] A groove is formed in the protective section. The groove is trapezoidal in shape along the vertical cross-section of the pipe opening of the protective section. The difference between the maximum and minimum lengths of the groove along the vertical cross-section of the pipe opening of the protective section is 0.5~1mm. Three sets of air passages are radially formed on the end face of the pipe opening of the protective section. The air passages are connected to the groove. The groove, air passages and the casting shell are integrally cast or formed by subsequent machining.

[0008] This utility model discloses a rust-proof pipe fitting, wherein the air passage is funnel-shaped and its inner diameter gradually decreases along the direction close to the groove.

[0009] This utility model relates to a rust-resistant pipe fitting, wherein the pipe fitting body and the protective section are integrally cast.

[0010] This utility model discloses a rust-proof pipe fitting, wherein the outer diameter of the groove perpendicular to the pipe opening of the protective section is 0.5~1mm larger than the inner diameter of the pipe opening of the protective section.

[0011] This utility model discloses a rust-proof pipe fitting, wherein the minimum distance between the groove along the radial direction of the pipe opening of the protective section and the end face of the pipe opening of the protective section is 1-2 mm.

[0012] This utility model discloses a rust-proof pipe fitting, wherein the pipe opening of the pipe fitting body is a polygonal pipe opening or a circular pipe opening, and the pipe opening of the protective section of the pipe fitting body is a polygonal pipe opening or a circular pipe opening that matches the pipe opening of the pipe fitting body.

[0013] This utility model discloses a type of rust-proof pipe fitting, including threaded elbow fittings, threaded tees, and cross fittings, as well as threaded reducing and equal diameter fittings. It is also applicable to threaded mechanical tees and other internally threaded fittings, with any one or more pipe ends having a threaded structure.

[0014] The rust-resistant pipe fitting of this utility model differs from the prior art in that:

[0015] This utility model discloses a rust-proof pipe fitting. After installation, the threaded connection between the pipe fitting and the steel pipe is located inside the protective section of the pipe fitting body. After installation, sealing material is filled into the space corresponding to the steel pipe or fitting within the protective section of the pipe fitting body, providing a sealing and protective function for the threaded connection. Specifically, grooves are created within the protective section, allowing the sealing material to backfill and form a barrier. The accumulation and compression of the sealing material in the grooves reduces air bubbles, enhancing the seal. Compared to traditional straight or tapered protective sections, this utility model reduces the leakage of sealing material during sealing by using grooves. Furthermore, the inclusion of air channels not only allows for air venting, ensuring even sealing, but also allows for the determination of proper sealing by observing the leakage of sealing material within the air channels. This prevents the threaded connection between the pipe fitting and the steel pipe from being exposed to the external environment, preventing corrosion from rainfall, acidic and alkaline substances in the atmosphere, and extending the service life of the pipe fitting and connecting steel pipe. Simultaneously, the threaded connection of the pipe fitting and steel pipe remains intact during replacement, facilitating easy disassembly and replacement.

[0016] The following description, in conjunction with the accompanying drawings, further illustrates a rust-resistant pipe fitting according to this utility model. Attached Figure Description

[0017] Figure 1 This is a front view of a rust-resistant pipe fitting;

[0018] Figure 2 yes Figure 1 Side view;

[0019] Figure 3 yes Figure 1 Axonometric drawing;

[0020] Figure 4 yes Figure 2 A sectional view along line A-A;

[0021] Figure 5 yes Figure 4 A magnified view of a portion of the image;

[0022] Figure 6 yes Figure 3 A magnified view of a portion of the image;

[0023] Figure 7 This is the front view of the tee fitting;

[0024] Figure 8 yes Figure 7 A sectional view along the middle edge BB;

[0025] Figure 9 This is a schematic diagram of a bend fitting with a polygonal pipe opening;

[0026] Figure 10 This is a schematic diagram of a tee fitting with a polygonal nozzle.

[0027] In the diagram:

[0028] Pipe body 1, protective section 2, groove 3, air passage 4. Detailed Implementation

[0029] 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.

[0030] Please see Figures 1-10 Specifically, the following embodiments are included: Example 1:

[0031] A type of rust-resistant pipe fitting is an elbow fitting, comprising a fitting body 1 and a protective section 2. The fitting body 1 and the protective section 2 are integrally cast. The protective section 2 is located at the pipe opening of the fitting body 1. The radial length of the protective section 2 along the pipe opening of the fitting body 1 is 4-26 mm. The outer diameter of the protective section 2 along the vertical section of the pipe opening of the fitting body 1 is 1-4 mm larger than the outer diameter of the vertical section of the fitting body 1 along the pipe opening. The inner diameter of the protective section 2 along the vertical section of the pipe opening of the fitting body 1 is 1-4 mm larger than the inner diameter of the vertical section of the fitting body 1 along the pipe opening.

[0032] A groove 3 is formed within the protective section 2. The groove 3 is trapezoidal in shape along the vertical cross-section of the pipe opening of the protective section 2. The difference between the maximum and minimum lengths of the groove 3 along the vertical cross-section of the pipe opening of the protective section 2 is 0.5~1mm. Three sets of air passages 4 are radially formed on the end face of the pipe opening of the protective section 2, and the air passages 4 are connected to the groove 3. The groove 3 and air passages 4 are integrally cast with the cast shell or formed by subsequent machining.

[0033] After installation, the threaded connection between the pipe fitting and the steel pipe is located inside the pipe opening protection section 2 of the pipe fitting body 1. After installation, sealing material is filled into the space corresponding to the steel pipe or fitting in the pipe opening protection section 2 of the pipe fitting body 1, which provides a sealing and protection function for the threaded connection between the pipe fitting and the steel pipe. In particular, a groove 3 is opened in the protection section 2, and the sealing material is backfilled into the groove 3 to form a barrier. Moreover, the sealing material in the groove 3 will reduce the generation of air bubbles due to accumulation and compression, thus enhancing the sealing performance. Compared with traditional straight or conical protection sections, this utility model can reduce the overflow of sealing material during sealing by setting the groove 3, avoiding the need for workers to apply it. Furthermore, by setting the air passage 4, not only can air be vented outward to make the sealing material seal evenly, but the overflow of sealing material in the air passage 4 can also be used to judge whether the sealing is in place. This prevents the threaded connections of pipe fittings and steel pipes from being exposed to the external environment, thus preventing corrosion of these connections by rainwater, acidic and alkaline substances in the atmosphere, extending the service life of the pipe fittings and connecting steel pipes. At the same time, it ensures the integrity of the threaded connections of the pipe fittings and steel pipes when replacing them, facilitating replacement and disassembly.

[0034] As a further explanation of this example, the air passage 4 is trumpet-shaped, and its inner diameter gradually decreases along the direction close to the groove 3.

[0035] This invention enables the gas in the sealing material to be discharged through the air passage 4 during the compression process, and the sealing is determined by observing whether the sealing material is discharged from the air passage 4.

[0036] As a further explanation of this example, the outer diameter of the groove 3 along the vertical section of the pipe opening of the protective section 2 is 0.5~1mm larger than the inner diameter of the pipe opening of the protective section 2.

[0037] As a further explanation of this example, the minimum distance between the groove 3 and the end face of the opening of the protective section 2 along the radial direction of the opening is 1-2 mm.

[0038] As a further explanation of this embodiment, the pipe opening of the pipe body 1 is a polygonal pipe opening or a circular pipe opening, and the pipe opening of the protective section 2 of the pipe body 1 is a polygonal pipe opening or a circular pipe opening that is consistent with the pipe opening of the pipe body 1. Example 2:

[0039] A rust-resistant pipe fitting is a tee fitting, comprising a tee fitting body 1 and a protective section 2. The fitting body 1 and the protective section 2 are integrally cast. The protective section 2 is located at the pipe opening of the fitting body 1. The radial length of the protective section 2 along the pipe opening of the tee fitting body 1 is 4-26mm. The outer diameter of the protective section 2 at the pipe opening of the tee fitting body 1 is 3mm larger than the outer diameter of the vertical section of the tee fitting body 1 at the pipe opening. The inner diameter of the protective section 2 at the pipe opening of the tee fitting body 1 is 3mm larger than the inner diameter of the vertical section of the tee fitting body 1 at the pipe opening.

[0040] A groove 3 is formed inside the protective section 2. The groove 3 is trapezoidal in shape along the vertical cross-section of the pipe opening of the protective section 2. The difference between the maximum and minimum lengths of the groove 3 along the vertical cross-section of the pipe opening of the protective section 2 is 0.5~1mm. Three sets of air passages 4 are radially formed on the end face of the pipe opening of the protective section 2. The air passages 4 are connected to the groove 3.

[0041] Of course, the pipe fittings of this utility model can be threaded elbow fittings, threaded tees, cross fittings, and threaded reducing and equal diameter fittings. They are also applicable to threaded mechanical tees and other internal thread fittings. Any one or more pipe ends are threaded. The structural design of the protective section 2 in this utility model can be applied to them, which will not be elaborated here.

[0042] As a further explanation of this example, the air passage 4 is trumpet-shaped, and its inner diameter gradually decreases along the direction close to the groove 3.

[0043] This invention enables the gas in the sealing material to be discharged through the air passage 4 during the compression process, and the sealing is determined by observing whether the sealing material is discharged from the air passage 4.

[0044] As a further explanation of this example, the outer diameter of the groove 3 along the vertical section of the pipe opening of the protective section 2 is 0.5~1mm larger than the inner diameter of the pipe opening of the protective section 2.

[0045] As a further explanation of this example, the minimum distance between the groove 3 and the end face of the opening of the protective section 2 along the radial direction of the opening is 1-2 mm.

[0046] As a further explanation of this embodiment, the pipe opening of the tee fitting body 1 is a polygonal pipe opening or a circular pipe opening, and the pipe opening of the protective section 2 of the tee fitting body 1 is a polygonal pipe opening or a circular pipe opening that is consistent with the pipe opening of the tee fitting body 1.

[0047] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A rust-resistant pipe fitting, characterized in that: It includes a pipe body (1) and a protective section (2). The protective section (2) is located at the pipe opening of the pipe body (1). The radial length of the protective section (2) along the pipe opening of the pipe body (1) is 4-26 mm. The outer diameter of the pipe opening protective section (2) of the pipe body (1) along the vertical section of the pipe opening is 1-4 mm larger than the outer diameter of the pipe body (1) along the vertical section of the pipe opening. The inner diameter of the pipe opening protective section (2) of the pipe body (1) along the vertical section of the pipe opening is 1-4 mm larger than the inner diameter of the pipe body (1) along the vertical section of the pipe opening. The protective section (2) has a groove (3) inside. The groove (3) is trapezoidal in shape along the vertical cross section of the pipe opening of the protective section (2). The difference between the maximum and minimum lengths of the groove (3) along the vertical cross section of the pipe opening of the protective section (2) is 0.5~1mm. Three sets of air passages (4) are radially opened on the end face of the pipe opening of the protective section (2). The air passages (4) are connected to the groove (3).

2. The anti-corrosion pipe fitting according to claim 1, characterized in that: The pipe body (1) and the protective section (2) are integrally cast.

3. The anti-corrosion pipe fitting according to claim 2, characterized in that: The airway (4) is funnel-shaped, and its inner diameter gradually decreases along the direction close to the groove (3).

4. A rust-resistant pipe fitting according to claim 3, characterized in that: The outer diameter of the groove (3) along the vertical section of the pipe opening of the protective section (2) is 0.5~1mm larger than the inner diameter of the pipe opening of the protective section (2).

5. A rust-resistant pipe fitting according to claim 4, characterized in that: The minimum distance between the groove (3) and the end face of the opening of the protective section (2) along the radial direction of the opening is 1-2 mm.

6. A rust-resistant pipe fitting according to claim 5, characterized in that: The pipe opening of the pipe body (1) is a polygonal pipe opening or a circular pipe opening, and the pipe opening of the protective section (2) of the pipe body (1) is a polygonal pipe opening or a circular pipe opening that is consistent with the pipe opening of the pipe body (1).

7. A rust-resistant pipe fitting according to claim 6, characterized in that: The aforementioned rust-resistant pipe fitting is a threaded elbow fitting, a threaded tee fitting, a cross fitting, and a threaded reducing or equal diameter fitting. It is also applicable to threaded mechanical tees and other internally threaded fittings, with any or multiple pipe ends having a threaded structure.

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