Connecting pipe fitting

Abstract

The utility model provides a connecting pipe fitting, and belongs to the technical field of connecting pipe fittings. The connecting pipe fitting solves the problem that the end of an existing connecting pipe fitting is expanded and cracked. The connecting pipe fitting comprises a plastic pipe body and a metal ring fixedly arranged outside one end of the plastic pipe body in a sleeving mode, internal threads are arranged at one end of the plastic pipe body, the cross section of the metal ring is in an L shape, and the metal ring comprises a first reinforcing face arranged in the axial direction of the plastic pipe body and a second reinforcing face arranged in the radial direction of the plastic pipe body. The first reinforcing face is attached to the peripheral wall of one end of the plastic pipe body, and the second reinforcing face is attached to the end face of one end of the plastic pipe body. The connecting pipe fitting has the advantages that the connecting pipe fitting is prevented from cracking, and the service life is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of connecting pipe fittings, and relates to a connecting pipe fitting. Background Technology

[0002] Pipe fittings are core components in piping systems used for connecting, branching, sealing, or changing the direction of pipes.

[0003] Existing connecting pipe fittings, such as the pipe fitting disclosed in Chinese patent literature for adjusting the horizontal state of a valve [Patent No.: 202022774308.5; Application Publication No.: CN214466778U], include a sleeve for connecting to a pipeline and a connecting pipe fitting for connecting to a valve; the sleeve has an internal thread with a margin, and the connecting pipe fitting includes a sleeve connecting end located at the first end of the connecting pipe fitting, the sleeve connecting end having an external thread with an adjustable range marking, the internal thread with a margin being used to connect and adjust the amount of screwing in the external thread with the adjustable range marking; the pipe fitting also includes a sealing mechanism, which is placed inside the sleeve and tightly close to the sleeve connecting end to achieve a sealing effect; when the pipe fitting is used to adjust the horizontal state of the valve, it is used by two pipe fittings symmetrically installed on both sides of the valve.

[0004] This type of pipe fitting has an internal thread at one end of the pipe connection and an external thread at one end of the valve connection. The pipe connection and valve connection are fixed together by the threaded connection. During use, due to temperature changes such as alternating hot and cold weather, the pipe fitting is subject to thermal expansion and contraction. Furthermore, the thermal expansion and contraction of the pipe connection and valve connection are not synchronized, which can cause the pipe connection to crack, leading to leakage, damage to the pipe fitting, and reduced service life. Summary of the Invention

[0005] The purpose of this utility model is to address the aforementioned problems in the existing technology by proposing a connecting pipe fitting that solves the technical problem of how to prevent the connecting pipe fitting from cracking and extend its service life.

[0006] The objective of this utility model can be achieved through the following technical solution: A connecting pipe fitting includes a plastic pipe body, one end of which has an internal thread. The connecting pipe fitting further includes a metal ring sleeved and fixed outside the end of the plastic pipe body. The metal ring has an L-shaped cross-section and includes a first reinforcing surface arranged axially along the plastic pipe body and a second reinforcing surface arranged radially along the plastic pipe body. The first reinforcing surface is attached to the outer peripheral wall of one end of the plastic pipe body, and the second reinforcing surface is attached to the end face of one end of the plastic pipe body.

[0007] One end of the plastic tube is connected to a pipe or nozzle via a threaded connection. A metal ring is fitted and fixed to the outside of one end of the plastic tube. The metal ring, made of metal, has sufficient strength to effectively limit the thermal expansion and contraction of the plastic tube end and the extent of its stretching, preventing deformation beyond its limit and thus preventing cracking of the connecting pipe and extending its service life. A first reinforcing surface is attached to the outer peripheral wall of one end of the plastic tube, and a second reinforcing surface is attached to the end face of one end of the plastic tube. This allows the metal ring to better fit the end of the plastic tube, better limiting deformation and preventing cracking of the connecting pipe, thereby extending its service life.

[0008] In one of the aforementioned connecting pipe fittings, the end of the first reinforcing surface furthest from the second reinforcing surface is circumferentially curved outwards, and the metal ring is flared. This structure facilitates the fitting and fixing of the metal ring to one end of the plastic pipe body, making metal ring installation convenient.

[0009] In one of the aforementioned connecting pipe fittings, the corner at one end of the plastic pipe is rounded. This rounding serves as a guide, facilitating the fitting and fixing of the metal ring to one end of the plastic pipe, thus making the metal ring installation convenient.

[0010] In one of the aforementioned connecting pipe fittings, the fitting further includes a cap, a snap fastener, an inner liner, and a sealing ring. The snap fastener is located within the cap, the inner liner is partially embedded within the other end of the plastic tube, and the sealing ring is located within the other end of the plastic tube. The inner circumferential wall of the other end of the plastic tube has an annular stepped surface. The cap is fixed to the other end of the plastic tube by a threaded connection, and the inner liner presses the sealing ring tightly onto the stepped surface. By securing the tube with the snap fastener and pressing the sealing ring tightly onto the stepped surface with the inner liner, the sealing ring provides a seal, allowing the other end of the connecting pipe fitting to be connected to the tube.

[0011] In one of the aforementioned connecting pipe fittings, the inner wall of the cap has a conical pushing surface, and the outer wall of the buckle has a conical abutting surface. The buckle has a through notch along the axial direction of the plastic pipe body, and the pushing surface abuts against the abutting surface. This structure allows for better buckle movement when the cap is connected to the plastic pipe body, and the notch allows the buckle to retract inward, thus securing the pipe.

[0012] In one of the aforementioned connecting pipe fittings, the inner circumferential wall of the other end of the plastic pipe body has an annular limiting ring, and the outer circumferential wall of the liner has an annular limiting groove, with the limiting ring embedded in the limiting groove. This structure ensures the liner is properly installed, preventing excessive compression of the sealing ring by the liner, thus preventing excessive deformation of the sealing ring, improving the stability of the sealing ring, and consequently improving the stability of the connecting pipe fitting.

[0013] Compared with the prior art, the connecting pipe fitting provided by this utility model has the following advantages:

[0014] 1. A metal ring is fitted and fixed to one end of the plastic pipe body of this connecting pipe fitting. The metal ring is made of metal material and has sufficient strength to effectively limit the plastic pipe body from opening outward in the circumferential direction, preventing the deformation of the plastic pipe body from exceeding the limit, so that the plastic pipe body will not be cracked, thus preventing the connecting pipe fitting from cracking and extending its service life.

[0015] 2. The metal ring of this connecting pipe fitting is flared, and one end of the plastic pipe body is rounded to facilitate the installation of the metal ring.

[0016] 3. The rounded end of the plastic tube of this connecting fitting protrudes slightly outward in the circumferential direction, so that the metal ring can be elastically tensioned after being fitted and fixed, making it easy to fix the metal ring. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the overall structure of this connecting pipe fitting.

[0018] Figure 2 This is an exploded view of the overall structure of this connecting pipe fitting.

[0019] Figure 3 This is the connecting pipe fitting Figure 1 Enlarged view of area A.

[0020] Figure 4 This is the connecting pipe fitting Figure 1 Enlarged view of area B.

[0021] In the figure, 1. Plastic tube body; 11. Stepped surface; 12. Limiting ring; 2. Metal ring; 21. First reinforcing surface; 22. Second reinforcing surface; 3. Cap; 31. Pushing surface; 4. Buckle; 41. Abutting surface; 42. Notch; 5. Lining; 51. Limiting groove; 6. Sealing ring. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] like Figure 1 , Figure 2As shown, this connecting pipe fitting includes a plastic pipe body 1, a metal ring 2, a cap 3, a buckle 4, an inner liner 5, and a sealing ring 6.

[0024] The plastic tube 1 is injection molded from plastic material. One end of the plastic tube 1 has a rounded corner and an internal thread. The metal ring 2 is formed by stamping a thin sheet of metal. The metal ring 2 is annular and is fitted and fixed to the outside of one end of the plastic tube 1. Figure 3 As shown, the metal ring 2 has an L-shaped cross-section. The metal ring 2 includes a first reinforcing surface 21 arranged axially along the plastic tube 1 and a second reinforcing surface 22 arranged radially along the plastic tube 1. The first reinforcing surface 21 is attached to the outer peripheral wall of one end of the plastic tube 1, and the second reinforcing surface 22 is attached to the end face of one end of the plastic tube 1. The end of the first reinforcing surface 21 furthest from the second reinforcing surface 22 is circumferentially flared outwards, giving the metal ring 2 a flared shape.

[0025] The inner wall of the cap 3 has a conical pushing surface 31. The buckle 4 is located in the cap 3. The outer wall of the buckle 4 has a conical abutment surface 41. The buckle 4 has a through notch 42 along the axial direction of the plastic tube 1. The inner liner 5 is partially embedded in the other end of the plastic tube 1. The outer peripheral wall of the inner liner 5 has an annular limiting groove 51. The sealing ring 6 is located in the other end of the plastic tube 1. Figure 4 As shown, the inner circumferential wall of the other end of the plastic tube 1 has an annular stepped surface 11 and an annular limiting ring 12. The cap 3 is fixed to the other end of the plastic tube 1 by a threaded connection. The pushing surface 31 is attached to the abutting surface 41, causing the buckle 4 to retract inward. After the limiting ring 12 is embedded in the limiting groove 51, the inner liner 5 presses the sealing ring 6 onto the stepped surface 11.

[0026] In use, the nozzle is fixed to one end of the plastic tube 1 by means of a threaded connection. The metal ring 2 enhances the strength of the plastic tube 1, so that one end of the plastic tube 1 will not crack.

[0027] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0028] Although this document uses numerous terms such as plastic tube body 1, stepped surface 11, limiting ring 12, metal ring 2, first reinforcing surface 21, second reinforcing surface 22, cap 3, pushing surface 31, buckle 4, abutting surface 41, notch 42, liner 5, limiting groove 51, and sealing ring 6, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A connecting pipe fitting, comprising a plastic pipe body (1), one end of which has an internal thread, characterized in that, The connecting pipe fitting also includes a metal ring (2) sleeved and fixed outside one end of the plastic pipe body (1). The cross-section of the metal ring (2) is L-shaped. The metal ring (2) includes a first reinforcing surface (21) arranged along the axial direction of the plastic pipe body (1) and a second reinforcing surface (22) arranged along the radial direction of the plastic pipe body (1). The first reinforcing surface (21) is attached to the outer peripheral wall of one end of the plastic pipe body (1), and the second reinforcing surface (22) is attached to the end face of one end of the plastic pipe body (1).

2. A connecting pipe fitting according to claim 1, characterized in that, The first reinforcing surface (21) is set to be raised outward in the circumferential direction at one end away from the second reinforcing surface (22), and the metal ring (2) is flared.

3. A connecting pipe fitting according to claim 1, characterized in that, The corner of one end of the plastic tube (1) is rounded.

4. A connecting pipe fitting according to claim 1, 2, or 3, characterized in that, The connecting pipe fitting also includes a cap (3), a buckle (4), an inner liner (5), and a sealing ring (6). The buckle (4) is located in the cap (3). The inner liner (5) is partially embedded in the other end of the plastic pipe body (1). The sealing ring (6) is located in the other end of the plastic pipe body (1). The inner circumferential wall of the other end of the plastic pipe body (1) has an annular stepped surface (11). The cap (3) is fixed to the other end of the plastic pipe body (1) by a threaded connection. The inner liner (5) presses the sealing ring (6) onto the stepped surface (11).

5. A connecting pipe fitting according to claim 4, characterized in that, The inner wall of the cap (3) has a conical pushing surface (31), the outer wall of the buckle (4) has a conical abutting surface (41), the buckle (4) has a through notch (42) along the axial direction of the plastic tube (1), and the pushing surface (31) is attached to the abutting surface (41).

6. A connecting pipe fitting according to claim 4, characterized in that, The plastic tube (1) has an annular limiting ring (12) on the inner peripheral wall at the other end, and the liner (5) has an annular limiting groove (51) on the outer peripheral wall, with the limiting ring (12) embedded in the limiting groove (51).

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