Socket and spigot press-fit pipe fitting capable of improving connection reliability

Abstract

The utility model discloses a socket press fit pipe fitting capable of improving connection reliability, which belongs to the technical field of pipeline connecting devices, and comprises a main pipe fitting (1) and an auxiliary pipe fitting (2), the main pipe fitting (1) comprises a main body pipe (11) and socket pipes (12) connected at two end parts of the main body pipe (11), the auxiliary pipe fitting (2) comprises a press fit pipe (21) and a press fit pipe (22) which are connected with each other, and the press fit pipe (22) is connected with the main body pipe (11). At least one groove (5) is formed in the adapting pipe (12), or at least one groove (5) is formed in the inner side of the pressing pipe (22), and a transition piece (6) matched with the groove in shape is arranged in the groove (5); or a strip-shaped sealing ring (7) is arranged between the adapting pipe (12) and the pipe; according to the utility model, the grooves and the transition pieces are properly arranged, so that the sealing performance and the vibration resistance are obviously improved, and the reliability of integral connection is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection devices, in particular to a socket-and-spigot compression fitting for improving connection reliability. Background Art

[0002] In the fields of water supply, gas supply, chemical industry, petroleum, electricity, fire protection, mining and shipbuilding, socket-and-spigot compression fittings are widely used due to their advantages of easy use, reliable connection and convenient maintenance. The working principle of socket-and-spigot compression fittings is to insert one end of the pipe into the socket part of another pipe, and then fix it by pressing or welding to form a sealed and stable connection.

[0003] The structure of current socket-and-spigot compression fittings is as follows: Figure 1 As shown, it includes a main pipe member 1 and an auxiliary pipe member 2 arranged at the pipe opening of the main pipe member 1, the main pipe member 1 includes a main pipe 11 and a receiving pipe 12 connected to the two ends of the main pipe 11, the main pipe 11 and the receiving pipe 12 are integrally formed, or the receiving pipe 12 is obtained by a hydraulic compression process at the end of the main pipe 11, and the two auxiliary pipe members 2 are respectively sleeved at the two pipe openings of the main pipe member 1; each of the auxiliary pipe members 2 includes a compression pipe 21 and a compression pipe 22 connected to each other; the compression pipe 21 is sleeved on the outer wall of the receiving pipe 12, and the surface of the compression pipe 21 sleeved on the outer wall of the receiving pipe 12 is basically flush with the main pipe 11, that is, it does not protrude, and there is a gap 3 between the compression pipe 22 and the receiving pipe 12 to facilitate the insertion of the pipe 4, and the width of the gap 3 is slightly larger than the wall thickness of the pipe 4.

[0004] The construction method of the socket-and-spigot compression-fit pipe of this structure is as follows: insert the pipe 4 into the gap 3 between the socket pipe 12 and the compression-fit pipe 22, continue to penetrate until the end of the pipe 4 abuts against the connection between the compression pipe 21 and the socket pipe 12, then inject sealant, such as anaerobic glue or AB glue, into the gap 3, and finally use a clamping or ring pressing tool to lock the compression-fit pipe 22 and press it tightly according to the specified pressure.

[0005] Although such a structure improves the connection reliability to a certain extent, there is still much room for improvement in its connection reliability. Utility Model Content

[0006] The purpose of the utility model is to provide a socket-and-spigot compression fitting with improved connection reliability to solve the above-mentioned problem.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a socket-and-spigot compression fitting for improving connection reliability, comprising a main pipe fitting and an auxiliary pipe fitting arranged at the pipe mouth of the main pipe fitting, the main pipe fitting comprising a main pipe and a socket pipe connected to both ends of the main pipe, the auxiliary pipe fitting comprising a compression pipe and a compression pipe connected to each other, at least one groove is opened in the socket pipe, or at least one groove is opened on the inner side of the compression pipe, and a transition piece matching the shape of the groove is arranged in the groove; or a strip-shaped sealing ring is arranged between the socket pipe and the pipe.

[0008] As a preferred technical solution: there is one groove, and the transition piece is in the shape of an O-ring and is arranged in the middle of the receiving tube or the press-fit tube. The position of the groove is not limited, but is preferably located in the middle of the receiving tube or the press-fit tube.

[0009] As a preferred technical solution: the number of the groove is one, the transition piece is in the shape of an annular belt, and the longitudinal section is a rectangle.

[0010] As a preferred technical solution: there are two grooves, and the transition piece is in the shape of an O-ring.

[0011] As a preferred technical solution: there are three grooves, and the transition piece is in the shape of an O-ring.

[0012] As a preferred technical solution: the material of the transition piece is a non-brittle material.

[0013] As a further preferred technical solution: the material of the transition piece is rubber, plastic or metal.

[0014] As a preferred technical solution, the main pipe is an elbow pipe, a straight pipe, a three-way pipe or a four-way pipe.

[0015] Compared with the prior art, the advantages of the utility model are: the utility model improves the sealing performance by at least 1 times through the appropriate arrangement of grooves and transition pieces, from the original ≥3MPa working pressure to ≥6MPa working pressure; the vibration resistance is improved by at least 50%, from the original 1 million vibrations without failure to 1.5 million vibrations without failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the prior art of the utility model;

[0017] Figure 2 This is a structural diagram of Embodiment 1 of the present utility model;

[0018] Figure 3 This is a structural diagram of Embodiment 2 of the present utility model;

[0019] Figure 4This is a structural diagram of Embodiment 3 of the present utility model;

[0020] Figure 5 This is a structural diagram of Embodiment 4 of the present utility model;

[0021] Figure 6 This is a structural diagram of Embodiment 5 of the present utility model;

[0022] Figure 7 This is a structural diagram of Embodiment 6 of the present utility model;

[0023] Figure 8 This is a structural diagram of Embodiment 7 of the present utility model;

[0024] Fig. 9 This is a structural diagram of Embodiment 8 of the present utility model;

[0025] Fig.10 This is a structural diagram of Embodiment 9 of the present utility model;

[0026] Fig.11 This is a structural diagram of Embodiment 10 of the present utility model;

[0027] Fig.12 This is a structural diagram of embodiment 11 of the utility model.

[0028] In the figure: 1. main pipe; 11. main pipe; 12. receiving pipe; 2. auxiliary pipe; 21. crimping pipe; 22. pressing pipe; 3. gap; 4. pipe; 5. groove; 6. transition piece; 7. strip sealing ring; 8. crimping tool. DETAILED DESCRIPTION

[0029] The utility model will be further described below in conjunction with the accompanying drawings.

[0030] Example 1

[0031] See also Figure 2 , a socket-and-spigot compression fitting for improving connection reliability, comprising a main pipe fitting 1 and an auxiliary pipe fitting 2 arranged at the pipe opening of the main pipe fitting 1, the main pipe fitting 1 comprising a main pipe 11 and a socket pipe 12 connected to both ends of the main pipe 11, the auxiliary pipe fitting 2 comprising a compression pipe 21 and a compression pipe 22 connected to each other, a groove 5 is formed in the socket pipe 12, and a transition piece 6 matching the shape of the groove 5 is arranged in the groove 5. In this embodiment, the transition piece 6 is in the shape of an O-ring and is arranged in the middle position of the socket pipe 12, and the main pipe 11 is a straight pipe;

[0032] During installation and use, the pipe 4 is inserted into the gap 3 between the receiving pipe 12 and the compression pipe 22, and then crimped with an existing conventional crimping tool 8 to complete the installation.

[0033] Example 2

[0034] Compared with Example 1, the main pipe 11 of this embodiment is a three-way pipe, and the rest is the same as Example 1. Figure 3 shown.

[0035] Example 3

[0036] Compared with the embodiment 1, the present embodiment has two grooves 5, which are symmetrically distributed in the middle of the receiving tube 12, and the rest is the same as the embodiment 1. Figure 4 shown.

[0037] Example 4

[0038] Compared with the embodiment 1, the present embodiment has three grooves 5, which are symmetrically distributed in the middle of the receiving tube 12, and the rest is the same as the embodiment 1. Figure 5 shown.

[0039] Example 5

[0040] Compared with the first embodiment, the groove 5 is arranged inside the press-fit tube 22, and the rest is the same as the first embodiment. Figure 6 shown.

[0041] Example 6

[0042] Compared with Example 5, this embodiment has two grooves 5, which are symmetrically distributed in the middle of the receiving tube 12, and the rest is the same as Example 5. Figure 7 shown.

[0043] Example 7

[0044] Compared with Example 5, this embodiment has three grooves 5, which are symmetrically distributed in the middle of the receiving tube 12, and the rest is the same as Example 5. Figure 8 shown.

[0045] Example 8

[0046] Compared with the first embodiment, the groove 5 in this embodiment is also one, but the transition piece 6 is annular and has a rectangular longitudinal section. The rest is the same as the first embodiment. Fig. 9 shown.

[0047] Example 9

[0048] Compared with the fifth embodiment, the groove 5 in the present embodiment is also one, but the transition piece 6 is annular and has a rectangular longitudinal section. The rest is the same as the fifth embodiment. Fig.10 shown.

[0049] Example 10

[0050] Compared with the first embodiment, the present embodiment does not provide a groove, but a strip-shaped sealing ring 7 is provided between the receiving pipe 12 and the pipe. The rest is the same as the first embodiment. Fig.11 shown.

[0051] Embodiment 11

[0052] Compared with the first embodiment, the present embodiment does not have a groove, but a strip-shaped sealing ring 7 is provided between the pressing tube 22 and the pipe. The rest is the same as the first embodiment. Fig.12 shown.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A socket-and-spigot compression fitting for improving connection reliability, comprising a main pipe fitting (1) and an auxiliary pipe fitting (2) arranged at the pipe opening of the main pipe fitting (1), the main pipe fitting (1) comprising a main pipe (11) and a socket pipe (12) connected to both ends of the main pipe (11), the auxiliary pipe fitting (2) comprising a compression pipe (21) and a compression fitting pipe (22) connected to each other, characterized in that: At least one groove (5) is formed in the receiving tube (12), or at least one groove (5) is formed inside the pressed tube (22), and a transition piece (6) matching the shape of the groove is provided in the groove (5); or a strip-shaped sealing ring (7) is provided between the receiving tube (12) and the pipe.

2. A socket-and-spigot compression fitting for improving connection reliability according to claim 1, characterized in that: There is one groove (5), and the transition piece (6) is in the shape of an O-ring and is arranged in the middle of the receiving tube (12) or the press-fit tube (22).

3. A socket-and-spigot compression fitting for improving connection reliability according to claim 1, characterized in that: There is one groove (5), and the transition piece (6) is in the shape of an annular belt, with a longitudinal cross section in the shape of a rectangle.

4. The socket-and-spigot compression fitting for improving connection reliability according to claim 1, characterized in that: There are two grooves (5), and the transition piece (6) is in the shape of an O-ring.

5. The socket-and-spigot compression fitting for improving connection reliability according to claim 1, characterized in that: There are three grooves (5), and the transition piece (6) is in the shape of an O-ring.

6. The socket-and-spigot compression fitting for improving connection reliability according to claim 1, characterized in that: The material of the transition piece is a non-brittle material.

7. A socket-and-spigot compression fitting for improving connection reliability according to claim 6, characterized in that: The material of the transition piece is rubber, plastic or metal.

8. The socket-and-spigot compression fitting for improving connection reliability according to claim 1, characterized in that: The main pipe (11) is an elbow pipe, a straight pipe, a three-way pipe or a four-way pipe.

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