Hoop type single-curved-edge socket pipe fitting

Abstract

A clamp type single-curved-edge socket pipe fitting relates to the field of engineering pipeline facilities and comprises a pipe fitting, a pipe, a sealing ring and a clamp. The pipe is inserted into the pipe fitting, and a curved edge is machined at the end of the pipe fitting. The sealing ring comprises three sections, namely a columnar section, a conical surface entity section and an annular edge covering section, and the three sections are connected in sequence; the hoop comprises three annular pressing parts which are arranged in sequence, and the three annular pressing parts are respectively a first annular pressing part, a second annular pressing part and a third annular pressing part; the columnar section is located between the first annular pressing part and the pipe. The conical surface solid section is located between the second annular pressing part and the pipe. The annular edge wrapping section wraps the side face of the curved edge, and the inner side of the second annular pressing part is also provided with a guide conical face. The curved edge is machined on the edge of the pipe fitting, after the pipe is inserted into the pipe fitting, three sealing points are built between the hoop and the pipe / the pipe fitting through the specially-made sealing ring, and the sealing performance is remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the field of engineering pipeline facilities, and particularly relates to a clamp type single-curved-edge socket-and-spigot pipe fitting. Background Art

[0002] A pipeline is a common engineering facility. When the medium transported by the pipeline is liquid or gas, the connection of the pipeline needs to have a sealing performance.

[0003] The utility model patent with the patent number 202121595022.9 discloses a clamp type sealed pipe joint. A clamp is arranged between two socket-and-spigot connected pipe fittings. One end of the clamp is stuck in the right-angled trapezoidal groove outside the socket of the pipe fitting, and the other end of the clamp is stuck on the end face of the sealing ring. Thus, the radial pre-tightening force of the clamp is converted into the pre-tightening force that pushes the sealing ring to move axially through the inclined plane. The conical section of the sealing ring is stuffed between the two pipe fittings, so as to seal and connect the two socket-and-spigot connected pipe fittings.

[0004] However, the end-face pressing sealing structure adopted in the above prior art has a poor ability to withstand the internal pressure of the pipe, and it is easy to leak when the internal pressure of the pipeline is relatively high, which needs to be improved. Summary of the Utility Model

[0005] The utility model provides a clamp type single-curved-edge socket-and-spigot pipe fitting, aiming to improve the sealing performance of the pipeline connection by improving the pipeline sealing structure in the prior art.

[0006] The technical problem solved by the utility model is realized by adopting the following technical scheme: The utility model provides a clamp type single-curved-edge socket-and-spigot pipe fitting, which includes a pipe fitting, a pipe, a sealing ring and a clamp. The pipe is inserted into the pipe fitting;

[0007] A curved edge is processed at the end of the pipe fitting;

[0008] The sealing ring includes three sections, which are respectively called a columnar section, a conical solid section and an annular edge section, and the three sections are connected in sequence;

[0009] The clamp includes three annular pressing parts arranged in sequence, which are respectively called a first annular pressing part, a second annular pressing part and a third annular pressing part. The three annular pressing parts respectively correspond to the three sections of the sealing ring one by one;

[0010] The columnar section is located between the first annular pressing part and the pipe;

[0011] The conical solid section is located between the second annular pressing part and the pipe, and a mutually matching guiding conical surface is respectively arranged on the outer side of the conical solid section and the inner side of the second annular pressing part;

[0012] The annular edge wrapping section is wrapped around the side surface of the curved edge, and a guiding conical surface is also arranged on the inner side of the second annular pressing part.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The utility model processes a curved edge at the edge of the pipe fitting. After the pipe is inserted into the pipe fitting, three sealing points are established between the clamp and the pipe / pipe fitting through a special sealing ring, which fully guarantees the sealing performance of the connection. Compared with the prior art, the sealing performance is significantly improved.

[0015] 2. In the utility model, the fastening force applied by the first annular pressing part on the clamp acts vertically on the outer surface of the pipe, so that a huge static friction force is generated between the columnar section of the sealing ring and the pipe, thereby more effectively preventing the pipe from slipping out under the action of internal pressure.

[0016] 3. The pipe fitting and the pipe of the utility model have a simple and flat structure, lower processing difficulty and lower processing cost. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the utility model.

[0018] Figure 2 is a schematic structural diagram of the clamp.

[0019] Figure 1 In the figure: 1. First annular pressing part; 2. Second annular pressing part; 3. Third annular pressing part; 4. Columnar section; 5. Conical solid section; 6. Annular edge wrapping section; 7. Curved edge; 8. Pipe; 9. Pipe fitting; 10. Guiding conical surface. Detailed Embodiment

[0020] The following further describes the utility model with reference to the drawings.

[0021] As Figure 1 shown, this embodiment includes a pipe fitting 9, a pipe 8, a sealing ring and a clamp, and the pipe 8 is inserted into the pipe fitting 9. These structures already exist in the prior art and will not be elaborated here.

[0022] As Figure 1 shown, in this embodiment, a curved edge 7 is processed at the end of the pipe fitting 9. The curved edge 7 has two functions. One is to axially limit the clamp, and the other is to cooperate with the sealing ring to achieve efficient sealing.

[0023] As Figure 1As shown, in this embodiment, the sealing ring includes three sections, respectively called the columnar section 4, the conical solid section 5, and the annular edge section 6, and the three sections are connected in sequence; correspondingly, the clamp also includes three annular pressing parts, respectively called the first annular pressing part 1, the second annular pressing part 2, and the third annular pressing part 3, and the three annular pressing parts respectively correspond to the three sections of the sealing ring one by one.

[0024] As Figure 2 shown, this embodiment provides a clamp structure for reference, but is not limited to this type of clamp. Other clamps in the prior art can also be used, as long as the inner shape of the clamp conforms to the above description and the drawings.

[0025] The columnar section 4 is located between the first annular pressing part 1 and the pipe 8. After the clamp is tightened, the first annular pressing part 1 presses the columnar section 4 on the sealing ring inward to achieve the sealing of the columnar section 4.

[0026] The conical solid section 5 is located between the second annular pressing part 2 and the pipe 8. And, guiding conical surfaces 10 are respectively arranged on the outer side of the conical solid section 5 and the inner side of the second annular pressing part 2. After the clamp is tightened, the second annular pressing part 2 presses the columnar section 4 on the sealing ring inward. Under the action of the guiding conical surfaces 10, the conical solid section 5 fits on the outer side of the pipe 8 and the side surface of the curved edge 7 to achieve the sealing of the conical solid section 5.

[0027] The annular edge section 6 covers the side surface of the curved edge 7. And, a guiding conical surface 10 is also arranged on the inner side of the second annular pressing part 2. After the clamp is tightened, the third annular pressing part 3 presses the annular edge section 6 on the sealing ring inward. Under the action of the guiding conical surface 10, the third annular pressing part 3 squeezes the annular edge section 6 and forces the curved edge 7 to approach the conical solid section 5 to achieve the sealing of the conical solid section 5.

Claims

1. A clamp-type single curved-edge socket pipe fitting, comprising a pipe fitting (9), a pipe material (8), a sealing ring and a clamp, wherein the pipe material (8) is inserted into the pipe fitting (9), and characterized in that: The end of the pipe (9) is processed with a curved edge (7); The sealing ring comprises three sections, namely a columnar section (4), a conical solid section (5) and an annular edge section (6), the three sections being connected in sequence; The clamp comprises three annular pressing parts arranged in sequence, which are respectively referred to as a first annular pressing part (1), a second annular pressing part (2) and a third annular pressing part (3), and the three annular pressing parts correspond one to one to the three sections of the sealing ring respectively; The columnar section (4) is located between the first annular pressing portion (1) and the pipe (8); The conical surface solid section (5) is located between the second annular pressing portion (2) and the pipe (8), and mutually matching guiding conical surfaces (10) are respectively provided on the outer side of the conical surface solid section (5) and the inner side of the second annular pressing portion (2); The annular edging section (6) covers the side surface of the curved edge (7), and a guiding conical surface (10) is also provided on the inner side of the second annular pressing portion (2).

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