A socket-and-spigot pipe fitting structure

Abstract

The present invention relates to the technical field of pipe fittings, and specifically to a socket-and-spigot pipe fitting structure, comprising a socket-and-spigot pipe cap, both ends of which are plugged with pipes, the inner ring surface of the socket-and-spigot pipe cap is integrally formed with a retaining ring, the inner ring surface of the retaining ring is integrally formed with a plug ring, the two ends of the plug ring are respectively plugged into the pipe openings of two pipes, both ends of the socket-and-spigot pipe cap are provided with reserved grooves, after the pipe is inserted into the pipe opening of the socket-and-spigot pipe cap, a welding seam strip is welded in the reserved groove, and a rubber cover is provided at the end of the socket-and-spigot pipe cap for covering the welding seam strip; the beneficial effects are as follows: the socket-and-spigot pipe fitting structure proposed by the present invention realizes the limitation of the insertion depth of the pipe and the double sealing effect by arranging a retaining ring and a plug ring on the inner ring surface of the socket-and-spigot pipe cap, and opening an embedding groove one on the outer ring surface of the plug ring, sleeved with a fixed sealing ring one, and opening an embedding groove two on the inner ring surface, and fixing a sealing ring two.

Description

Technical Field

[0001] The invention relates to the field of pipe fittings, in particular to a socket-and-spigot type pipe fitting structure. Background Art

[0002] In the pipeline system, pipe connection is the key link to ensure the integrity and functionality of the system. Although traditional pipe connection methods, such as threaded connection and flange connection, can meet the connection requirements to a certain extent, they may not be ideal in certain scenarios, such as when fast installation, high sealing performance or high pressure are required.

[0003] As a new type of connection method, the socket-and-spigot pipe fitting structure has been widely used in pipeline systems due to its advantages such as easy installation, good sealing, and strong pressure bearing capacity. However, the existing socket-and-spigot pipe fitting structure still has some shortcomings, such as the sealing performance of the connection is not stable enough, it is easily corroded by the external environment after welding, and the pipe fitting itself is too heavy, resulting in inconvenience in installation. Summary of the invention

[0004] The object of the present invention is to provide a socket-and-spigot pipe fitting structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a socket-and-spigot pipe fitting structure, comprising a socket-and-spigot welded pipe cap, both ends of which are plugged with pipes, the inner ring surface of the socket-and-spigot welded pipe cap is integrally formed with a retaining ring, the inner ring surface of the retaining ring is integrally formed with a plug ring, the two ends of the plug ring are respectively plugged into the pipe openings of two pipes, both ends of the socket-and-spigot welded pipe cap are provided with reserved grooves, after the pipe is inserted into the pipe opening of the socket-and-spigot welded pipe cap, it is welded in the reserved groove to form a welding seam strip, and the end of the socket-and-spigot welded pipe cap is provided with a rubber cover for covering the welding seam strip.

[0006] Preferably, the retaining ring is an annular plate structure, and the retaining ring is centered in the inner ring of the socket weld cap. After the two pipes are respectively inserted into the two pipe openings of the socket weld cap, the two pipes respectively rest on the two side annular surfaces of the retaining ring.

[0007] Preferably, the inner ring diameter of the socket welding pipe cap is equal to the outer ring diameter of the pipeline, the inner ring diameter of the pipeline is equal to the outer ring diameter of the plug ring, and both ends of the outer ring surface of the plug ring are provided with an embedding groove.

[0008] Preferably, the embedding groove is an annular groove, and a sealing ring is fixed inside the embedding groove. The outer ring diameter of the sealing ring is larger than the outer ring diameter of the plug ring. After the pipe is inserted into the pipe mouth of the socket welding pipe cap and abuts against one side of the retaining ring, the sealing ring is clamped between the pipe and the plug ring to produce elastic deformation.

[0009] Preferably, the inner ring surface of the socket weld pipe cap is provided with an embedding groove 2, which is an annular groove. There are two embedding grooves 2, which are symmetrically distributed about the retaining ring. A sealing ring 2 is fixed inside the embedding groove 2, and the inner ring diameter of the sealing ring 2 is smaller than the inner ring diameter of the socket weld pipe cap. After the pipe is inserted into the pipe mouth of the socket weld pipe cap and abuts against one side of the retaining ring, the sealing ring 2 is clamped between the socket weld pipe cap and the pipe to generate elastic deformation.

[0010] Preferably, the reserved groove is an annular groove, which is used for welding the pipe into the socket welding cap to form a welding seam strip.

[0011] Preferably, the outer ring surfaces at both ends of the socket weld pipe cap are provided with side grooves, the side grooves are annular grooves, the rubber cover is a circular ring plate with an "L"-shaped cross-section, one end of the rubber cover is fixed to the surface of the side groove, the inner ring diameter of the other end of the rubber cover is smaller than the outer ring diameter of the pipe, and the other end of the rubber cover is sleeved on the pipe body of the pipe.

[0012] Preferably, a rubber sealing ring is integrally formed on the other end of the rubber cover close to the reserved groove. The rubber sealing ring is a circular ring plate with a right-angled trapezoidal cross-section. The inner ring diameter of the rubber sealing ring is equal to the outer ring diameter of the pipeline, and the outer ring diameter of the rubber sealing ring at one end close to the rubber cover is larger than the outer ring diameter of the reserved groove.

[0013] Preferably, a rubber ring is fixed to the other end of the rubber cover, and the rubber ring is a circular ring with a circular cross section.

[0014] Preferably, a weight-reducing cavity is provided inside the socket-welded pipe cap, and the weight-reducing cavity is in the form of an annular groove. An outer annular groove is provided on the outer annular surface of the socket-welded pipe cap, and the outer annular groove is in the form of a circular annular groove. Compared with the prior art, the beneficial effects of the present invention are:

[0015] The socket-and-spigot pipe fitting structure proposed in the present invention realizes the limitation of the insertion depth of the pipeline and the double sealing effect by arranging a retaining ring and a plug ring on the inner ring surface of the socket-and-spigot pipe cap, and opening an embedding groove 1 on the outer ring surface of the plug ring, sleeved with a fixed sealing ring 1, and opening an embedding groove 2 on the inner ring surface, and fixing the sealing ring 2. When the pipeline is inserted into the socket-and-spigot pipe cap, the sealing ring 1 and the sealing ring 2 will be squeezed to produce elastic deformation, so as to fit tightly between the pipeline and the socket-and-spigot pipe cap, effectively preventing the leakage of the medium. Both ends of the socket-and-spigot pipe cap are provided with reserved grooves for welding to form welding seams. At the same time, a rubber cover is provided at the end of the socket-and-spigot pipe cap for covering and protecting the welding seams. One end of the rubber cover is fixed on the surface of the side groove, and the other end is sleeved on the pipeline, and is provided with a rubber sealing ring, which can be tightly inserted into the reserved groove, effectively reducing the erosion of the welding seams by external moisture and extending the service life of the pipe fitting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 It is a side view of the structure of the present invention;

[0018] Figure 3 for Figure 2 Structural cross-section view at AA in the middle;

[0019] Figure 4 for Figure 3 A schematic diagram of the structure enlargement in the middle;

[0020] Figure 5 for Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0021] Figure 6 This is a schematic diagram of the connection structure between the socket welding pipe cap and the rubber cover of the present invention;

[0022] Figure 7 This is a schematic diagram of the socket welding pipe cap structure of the present invention;

[0023] Figure 8 It is a schematic diagram of the structure of the rubber cover of the present invention.

[0024] In the figure: socket welding pipe cap 1, pipe 2, retaining ring 3, plug ring 4, embedded groove 1 5, sealing ring 1 6, embedded groove 2 7, sealing ring 2 8, reserved groove 9, side groove 10, rubber cover 11, rubber sealing ring 12, rubber ring 13, weight reduction cavity 14, outer ring groove 15, welding seam strip 16. DETAILED DESCRIPTION

[0025] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 8 The present invention provides a technical solution: a socket-type pipe fitting structure, comprising a socket-welded pipe cap 1, both ends of which are plugged with pipes 2, the inner ring surface of the socket-welded pipe cap 1 is integrally formed with a retaining ring 3, the retaining ring 3 is an annular plate structure, the retaining ring 3 is centered in the inner ring of the socket-welded pipe cap 1, and after two pipes 2 are respectively inserted into the two pipe openings of the socket-welded pipe cap 1, the two pipes 2 are respectively against the two side ring surfaces of the retaining ring 3; when in use, after the pipe 2 is inserted into the socket-welded pipe cap 1, the end of the pipe 2 is against one side of the retaining ring 3, so that the distance of the pipe 2 inserted into the socket-welded pipe cap 1 is limited, and it is ensured that the lengths of the pipes 2 inserted at both ends of the socket-welded pipe cap 1 are consistent.

[0027] The inner ring surface of the retaining ring 3 is integrally formed with a plug ring 4, and the two ends of the plug ring 4 are respectively inserted into the pipe openings of the two pipes 2. The inner ring diameter of the socket welding pipe cap 1 is equal to the outer ring diameter of the pipe 2, and the inner ring diameter of the pipe 2 is equal to the outer ring diameter of the plug ring 4. Both ends of the outer ring surface of the plug ring 4 are provided with an embedding groove 5, which is an annular groove. A sealing ring 6 is fixed inside the embedding groove 5. The outer ring diameter of the sealing ring 6 is larger than the outer ring diameter of the plug ring 4. After the pipe 2 is inserted into the pipe opening of the socket welding pipe cap 1 and abuts against one side of the retaining ring 3, the sealing ring 6 clamps Elastic deformation is generated between the pipe 2 and the plug ring 4; when in use, when the pipe 2 is inserted into the socket weld pipe cap 1 and abuts against one side of the retaining ring 3, the end of the plug ring 4 is inserted into the pipe mouth of the pipe 2, and the sealing ring 6 is compressed and deformed to seal the gap between the pipe 2 and the plug ring 4, and when the pipe 2 and the socket weld pipe cap 1 are not welded, the sealing ring 6 is clamped between the pipe 2 and the plug ring 4 to play an anti-slip role; when the socket weld pipe cap 1 and the pipe 2 are welded, the sealing ring 6 plays a role in improving the sealing effect after the socket weld pipe cap 1 and the pipe 2 are connected.

[0028] An embedding groove 27 is provided on the inner ring surface of the socket weld pipe cap 1. The embedding groove 27 is an annular groove. There are two embedding grooves 27, which are symmetrically distributed about the retaining ring 3. A sealing ring 28 is fixed inside the embedding groove 27. The inner ring diameter of the sealing ring 28 is smaller than the inner ring diameter of the socket weld pipe cap 1. After the pipe 2 is inserted into the pipe mouth of the socket weld pipe cap 1 and abuts against one side of the retaining ring 3, the sealing ring 28 is clamped between the socket weld pipe cap 1 and the pipe 2 to produce elastic deformation; the reason why the sealing ring 28 is embedded on the inner ring surface of the socket weld pipe cap 1 is that after the pipe 2 is inserted into the pipe mouth of the socket weld pipe cap 1, the sealing ring 28 is squeezed to increase the friction on the pipe 2 and improve the sealing effect after the socket weld pipe cap 1 and the pipe 2 are connected.

[0029] Both ends of the socket welding pipe cap 1 are provided with reserved grooves 9. After the pipe 2 is inserted into the pipe mouth of the socket welding pipe cap 1, a welding seam strip 16 is welded in the reserved groove 9. The reserved groove 9 is an annular groove, which is used for welding the pipe 2 into the socket welding pipe cap 1 to form the welding seam strip 16. The end of the socket welding pipe cap 1 is provided with a rubber cover 11 for covering the welding seam strip 16. The outer ring surfaces of both ends of the socket welding pipe cap 1 are provided with side grooves 10. The side grooves 10 are annular grooves. The rubber cover 11 is an annular ring plate with an "L"-shaped cross section. One end of the rubber cover 11 is fixed to the surface of the side groove 10. The inner ring diameter of the other end of the rubber cover 11 is smaller than the outer ring diameter of the pipe 2, and the other end of the rubber cover 11 is sleeved on the pipe body of the pipe 2; the other end of the rubber cover 11 is integrally formed with a rubber sealing ring 12 on the side close to the reserved groove 9, and the rubber sealing ring 12 is a circular ring plate with a right-angled trapezoidal cross section, the inner ring diameter of the rubber sealing ring 12 is equal to the outer ring diameter of the pipe 2, and the outer ring diameter of the end of the rubber sealing ring 12 close to the rubber cover 11 is larger than the outer ring diameter of the reserved groove 9; the other end of the rubber cover 11 is fixed with a rubber ring 13, and the rubber ring 13 is a circular ring with a circular cross section.

[0030] During use, when the pipe 2 is not inserted into the socket welding pipe cap 1, the rubber cover 11 is turned outward by pinching the rubber ring 13, and the reserved groove 9 is exposed. The pipe 2 is inserted into the pipe mouth of the socket welding pipe cap 1 and rests against one side of the retaining ring 3. Then, the connecting seam of the socket welding pipe cap 1 and the pipe 2 is welded in the reserved groove 9 with the help of a welding gun to form a welding seam strip 16. After the temperature of the welding seam strip 16 drops, the rubber cover 11 is turned back to cover the reserved groove 9, and the rubber sealing ring 12 is pushed and inserted into the reserved groove 9 to reduce the erosion of the welding seam strip 16 by external moisture.

[0031] A weight-reducing cavity 14 is provided inside the socket weld pipe cap 1, and the weight-reducing cavity 14 is in the form of an annular groove. An outer annular groove 15 is provided on the outer annular surface of the socket weld pipe cap 1, and the outer annular groove 15 is in the form of a circular annular groove. The weight-reducing cavity 14 is provided not only to reduce the weight of the socket weld pipe cap 1, but also when cracks appear on the outer annular surface of the socket weld pipe cap 1, the cracks will be cut off in the weight-reducing cavity 14, thereby preventing the cracks from extending to the inner ring of the socket weld pipe cap 1.

[0032] The usage process of the socket-and-spigot pipe fitting structure is as follows:

[0033] Preparation before installation: The socket welding pipe cap 1 has an inner ring surface, and both ends of the inner ring surface are designed to be plugged into the pipe 2. A retaining ring 3 is integrally formed in the center of the inner ring surface of the socket welding pipe cap 1. The retaining ring 3 is an annular plate structure, which is used to limit the insertion depth of the pipe 2 and ensure that the lengths of the pipes 2 at both ends are consistent. The inner ring surface of the retaining ring 3 is also integrally formed with a plug ring 4, and the two ends of the plug ring 4 are designed to be inserted into the pipe openings of the two pipes 2.

[0034] Sealing and anti-slip mechanism: Both ends of the outer ring surface of the plug ring 4 are provided with an embedding groove 5, and a sealing ring 6 is fixed inside. When the pipe 2 is inserted into the socket welding pipe cap 1 and abuts against one side of the retaining ring 3, the sealing ring 6 will be subjected to the pressure between the pipe 2 and the plug ring 4, and will produce elastic deformation, thereby sealing the gap between the two. Before welding, the clamping effect of the sealing ring 6 also plays an anti-slip effect, preventing the pipe 2 from loosening in the socket welding pipe cap 1.

[0035] Further sealing and friction enhancement: The inner ring surface of the socket weld cap 1 is also provided with two embedding grooves 2 7, and a sealing ring 2 8 is fixed inside. When the pipe 2 is inserted into the socket weld cap 1, the sealing ring 2 8 will be squeezed, further increasing the friction between the pipe 2 and the socket weld cap 1 and improving the sealing effect.

[0036] Welding and protection: Both ends of the socket weld cap 1 are provided with reserved grooves 9 for welding after the pipe 2 is inserted to form a welding seam 16. The end of the socket weld cap 1 is provided with a rubber cover 11, which is a circular ring plate with an "L"-shaped cross section, used to cover the welding seam 16 to prevent external moisture erosion. One end of the rubber cover 11 is fixed to the surface of the side groove 10, and the other end is sleeved on the pipe body of the pipe 2, and is provided with a rubber sealing ring 12. The rubber sealing ring 12 is a circular ring plate with a right-angled trapezoidal cross section, which can be inserted into the reserved groove 9 to provide a better sealing effect. A rubber ring 13 is also fixed to the other end of the rubber cover 11, which is convenient for manually turning the rubber cover 11 outside to expose the reserved groove 9 for welding.

[0037] Structural optimization and weight reduction: A weight reduction cavity 14 is provided inside the socket weld cap 1 to reduce its weight. At the same time, if cracks appear on the outer ring surface of the socket weld cap 1, the cracks will be cut off at the weight reduction cavity 14 to prevent them from extending to the inner ring. The outer ring surface of the socket weld cap 1 is also provided with an outer ring groove 15, which may be used for additional connection or fixing needs.

[0038] Usage process: The pipe 2 is inserted into the pipe opening of the socket welding pipe cap 1 until it contacts one side of the retaining ring 3. The connection seam between the socket welding pipe cap 1 and the pipe 2 is welded in the reserved groove 9 by means of a welding torch to form a welding seam strip 16. After the welding seam strip 16 cools down, the rubber cover 11 is turned back to cover the reserved groove 9, and the rubber sealing ring 12 is pushed into the reserved groove 9 to provide additional sealing protection.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A socket-and-spigot pipe fitting structure, comprising a socket-and-spigot welded pipe cap (1), both ends of which are connected to pipes (2), characterized in that: The inner ring surface of the socket-welded pipe cap (1) is integrally formed with a retaining ring (3), and the inner ring surface of the retaining ring (3) is integrally formed with a plug ring (4). The two ends of the plug ring (4) are respectively inserted into the pipe openings of the two pipes (2). Both ends of the socket-welded pipe cap (1) are provided with reserved grooves (9). After the pipe (2) is inserted into the pipe opening of the socket-welded pipe cap (1), a welding seam strip (16) is formed by welding in the reserved grooves (9). The end of the socket-welded pipe cap (1) is provided with a rubber cover (11) for covering the welding seam strip (16).

2. A socket-and-spigot type pipe fitting structure according to claim 1, characterized in that: The retaining ring (3) is an annular plate structure, and the retaining ring (3) is centered in the inner ring of the socket welded pipe cap (1). After the two pipes (2) are respectively inserted into the two pipe openings of the socket welded pipe cap (1), the two pipes (2) respectively abut against the two side annular surfaces of the retaining ring (3).

3. A socket-and-spigot pipe fitting structure according to claim 1, characterized in that: The inner ring diameter of the socket-welded pipe cap (1) is equal to the outer ring diameter of the pipe (2), the inner ring diameter of the pipe (2) is equal to the outer ring diameter of the plug ring (4), and both ends of the outer ring surface of the plug ring (4) are provided with an embedding groove (5).

4. A socket-and-spigot type pipe fitting structure according to claim 3, characterized in that: The embedding groove (5) is an annular groove, and a sealing ring (6) is fixedly sleeved inside the embedding groove (5). The outer ring diameter of the sealing ring (6) is larger than the outer ring diameter of the plug ring (4). After the pipe (2) is inserted into the pipe mouth of the socket welding pipe cap (1) and abuts against one side of the retaining ring (3), the sealing ring (6) is clamped between the pipe (2) and the plug ring (4) to generate elastic deformation.

5. The socket-and-spigot type pipe fitting structure according to claim 1, characterized in that: The inner ring surface of the socket weld pipe cap (1) is provided with an embedding groove (7), which is an annular groove. There are two embedding grooves (7), which are symmetrically distributed about the retaining ring (3). A sealing ring (8) is fixed inside the embedding groove (7), and the inner ring diameter of the sealing ring (8) is smaller than the inner ring diameter of the socket weld pipe cap (1). After the pipe (2) is inserted into the pipe mouth of the socket weld pipe cap (1) and abuts against one side of the retaining ring (3), the sealing ring (8) is clamped between the socket weld pipe cap (1) and the pipe (2) to generate elastic deformation.

6. The socket-and-spigot type pipe fitting structure according to claim 1, characterized in that: The reserved groove (9) is an annular groove and is used for welding the pipe (2) into the socket welding cap (1) to form a welding seam strip (16).

7. The socket-and-spigot type pipe fitting structure according to claim 1, characterized in that: The outer ring surfaces at both ends of the socket welded pipe cap (1) are provided with side grooves (10), the side grooves (10) are annular grooves, the rubber cover (11) is an annular plate with an "L"-shaped cross section, one end of the rubber cover (11) is fixed to the surface of the side groove (10), the inner ring diameter of the other end of the rubber cover (11) is smaller than the outer ring diameter of the pipe (2), and the other end of the rubber cover (11) is sleeved on the pipe body of the pipe (2).

8. The socket-and-spigot type pipe fitting structure according to claim 7, characterized in that: A rubber sealing ring (12) is integrally formed on one side of the other end of the rubber cover (11) close to the reserved groove (9); the rubber sealing ring (12) is a circular ring plate with a right-angle trapezoidal cross section; the inner ring diameter of the rubber sealing ring (12) is equal to the outer ring diameter of the pipeline (2); and the outer ring diameter of the end of the rubber sealing ring (12) close to the rubber cover (11) is larger than the outer ring diameter of the reserved groove (9).

9. The socket-and-spigot type pipe fitting structure according to claim 1, characterized in that: A rubber ring (13) is fixed to the other end of the rubber cover (11), and the rubber ring (13) is in the form of a circular ring with a circular cross section.

10. The socket-and-spigot type pipe fitting structure according to claim 1, characterized in that: The socket weld pipe cap (1) is provided with a weight-reducing cavity (14) inside, and the weight-reducing cavity (14) is an annular groove. The outer ring surface of the socket weld pipe cap (1) is provided with an outer ring groove (15), and the outer ring groove (15) is a circular ring groove.

Images