An enhanced electrofusion connector

Abstract

This utility model discloses an enhanced electrofusion connector for heating pipe fittings. It includes a connector body with a heating wire mounted on it. The heating wire includes a first ring and a second ring located radially inside the first ring. The first ring is fixedly installed on the inner wall of the connector body. The heating wire also includes a third ring connecting the first and second rings. The connector body has a protruding ring, and the third ring is installed on the end face of the protruding ring. A pipe fitting is inserted into the connector body such that its outer wall contacts the first ring, one end face of the pipe contacts the third ring, and its inner wall contacts the second ring. This utility model provides an enhanced electrofusion connector that improves the sealing performance of pipe fitting connections.

Description

Technical Field

[0001] This utility model relates to the field of pipeline electrofusion connection technology, and more specifically, to an enhanced electrofusion connector. Background Technology

[0002] Polyethylene (PE) pipes are mainly connected by electrofusion, thermofusion, and mechanical methods. Electrofusion, in particular, uses an internal heating wire to melt the PE material and achieve the connection. Due to its high reliability, construction flexibility, and wide applicability, PE electrofusion has become one of the main connection methods for small and medium-diameter PE pipe systems, especially in gas and water supply projects.

[0003] Currently, the electrofusion butt welding of polyethylene pipes typically only softens the outer wall of its ends by heating with a heating wire. After the polyethylene pipe is inserted into other pipes, the sealing performance of the polyethylene pipe end face is poor, which is a shortcoming. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an enhanced electrofusion connector to improve the sealing performance of pipe fittings.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: an enhanced electrofusion connector for heating pipe fittings, comprising a connector body, wherein an electric heating wire is installed on the connector body, the electric heating wire includes a first ring and a second ring located radially inside the first ring, the first ring being fixedly installed on the inner wall of the connector body; the electric heating wire also includes a third ring connecting the first ring and the second ring, the connector body is provided with a convex ring, and the third ring is installed on the end face of the convex ring; the pipe fitting is inserted into the connector body so that the outer wall of the pipe fitting contacts the first ring, one end face of the pipe fitting contacts the third ring, and the inner wall of the pipe fitting contacts the second ring, and the connector body is wrapped with a reinforcing layer.

[0006] The present invention is further configured such that the pipe fitting is inserted into the end of the connector body, and the inner diameter of the ring gradually decreases.

[0007] The present invention is further configured such that the ring body includes a contact surface located on the radial inner side, and the contact surface abuts against the outer wall of the pipe fitting.

[0008] The present invention is further configured such that a groove is provided on the ring body, and the groove and the contact surface are distributed at intervals along the axial direction of the ring body.

[0009] The present invention is further configured such that the diameter of the first ring is larger than the diameter of the second ring.

[0010] The present invention is further configured such that the heating wire is connected to a terminal block, and the heating wire is connected to an external power source through the terminal block.

[0011] The present invention is further configured such that the terminal block is installed on the convex ring, and the terminal block is electrically connected to the ring body three.

[0012] The present invention is further configured such that the triaxial length of the ring body is set to 8mm-12mm.

[0013] In summary, this utility model has the following beneficial effects:

[0014] The outer wall of the fitting contacts ring one, the right end face of the fitting contacts ring three, and the inner wall of the fitting contacts ring two. After heating, the outer wall, inner wall, and end face of the right end of the fitting soften, making it easier to remove and connect with other fittings. The axial length of ring three is relatively short. The design of rings two and three is to promote the softening of the fitting end face, allowing for rapid softening before connection, thus improving the sealing performance. Attached Figure Description

[0015] Figure 1 This is a cross-sectional schematic diagram of an embodiment;

[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 This is a diagram showing the positional relationship between the heating wire and the fittings in the embodiment;

[0018] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0019] Figure 5 This is a diagram showing the contact relationship between the heating wire and the fittings in the embodiment;

[0020] Figure 6 for Figure 5 A magnified view of point C in the middle.

[0021] Reference numerals in the attached drawings: connector body 1, convex ring 11, pipe fitting 2, heating wire 3, ring body one 31, contact surface 311, groove 312, ring body two 32, ring body three 33, terminal post 4, reinforcing layer 5. Detailed Implementation

[0022] 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.

[0023] like Figure 1As shown, this embodiment discloses an enhanced electrofusion connector for heating pipe 2, which is a plastic pipe. The wall of pipe 2 is heated to melt it, so as to facilitate docking with other pipes. During docking, the pipes are fixed to each other as the wall of pipe 2 solidifies.

[0024] like Figure 1 As shown, the electrofusion connector includes a connector body 1. The material of the connector body 1 is PE100 grade material. By adding appropriate amounts of flame retardant and antistatic agent, the flame retardant and antistatic functions of PE100 grade material are achieved, so that the electrofusion connector has flame retardant and antistatic functions.

[0025] The connector body 1 has a ring-shaped structure. From the inside out, the connector body 1 consists of an inner polyethylene layer, a reinforcing layer 5 (steel strip, wire mesh, or fiber reinforcement layer), and an outer polyethylene layer. The reinforcing layer 5 is encased within the connector body 1 during the fusion molding process. Compared to typical single-layer polyethylene electrofusion connectors, the inclusion of the reinforcing layer 5 improves the connector's strength and ring stiffness, making it less prone to deformation and damage under higher internal or external pressures, thus extending its service life and broadening its application range. By incorporating the reinforcing layer 5 within the connector body 1, it meets the requirements for pipelines with pressure ratings of 2.5 MPa and above.

[0026] The main body 1 of the connector is equipped with a heating wire 3. The heating wire 3 includes a ring 31 and a ring 32 located radially inside the ring 31. The diameter of the ring 31 is larger than the diameter of the ring 32. The ring 31 is fixedly installed on the inner wall of the main body 1. Both the ring 31 and the ring 32 are spiral structures. The ring 31 is spirally distributed along the inner circumferential wall of the main body 1.

[0027] The heating wire 3 also includes a ring body 33 connecting the first ring body 31 and the second ring body 32. The inner wall of the right end face of the connector body 1 is provided with a protruding ring 11. The protruding ring 11 extends radially inward along the inner circumferential wall of the connector body 1 to form an annular protrusion. The ring body 33 is installed on the left end face of the protruding ring 11. The ring body 33 has a vortex-shaped structure.

[0028] like Figure 1 , Figure 2 As shown, the connector body 1 is equipped with a terminal block 4. Specifically, the terminal block 4 is installed on the convex ring 11. Two electrical contacts are provided on the ring body 33. The terminal block 4 is electrically connected to the ring body 33. The heating wire 3 is connected to an external power source through the terminal block 4. After being powered on, the heating wire 3 heats up.

[0029] like Figure 1 , Figure 3As shown, fitting 2 is inserted into connector body 1 so that the outer wall of fitting 2 contacts ring 1 31, the right end face of fitting 2 contacts ring 33 33, and the inner wall of fitting 2 contacts ring 2 32. After fitting 2 is heated, the outer wall, inner wall, and end face of the right end interface of fitting 2 are all softened, making it easier to remove and connect with other fittings. Fitting 2 is made of polyethylene (PE). The axial length of ring 33 is relatively short, set at 8mm-12mm. The arrangement of ring 2 32 and ring 33 is to promote the softening of the end face of fitting 2, allowing the end face of fitting 2 to soften quickly. Connecting after the end face of fitting 2 has softened improves the sealing performance.

[0030] Combination Figure 1 , Figure 5 , Figure 6 The annular body 31 includes a contact surface 311 located radially inner. The contact surface 311 matches and abuts against the arc surface of the outer wall of the pipe fitting 2. Since the pipe fitting 2 is a plastic part, there is a problem with poor dimensional accuracy. The inner diameter of the annular body 31 is controlled near the maximum outer diameter of the pipe fitting 2, and in most cases, there is a gap between the outer wall of the pipe fitting 2 and the contact surface 311. By setting the contact surface 311, the contact surface 311 and the outer wall surface of the annular body 31 form an inner-outer relative relationship, and the heating efficiency of the annular body 31 by the contact surface 311 reaches its maximum.

[0031] The ring body 31 is provided with a groove 312. The groove 312 and the contact surface 311 are distributed at intervals along the axial direction of the ring body 31. By providing the groove 312, the radiation surface of the ring body 31 for heat radiation to the outer wall of the pipe 2 is increased, thereby improving the heating efficiency.

[0032] like Figure 3 , Figure 4 As shown, the pipe fitting 2 is inserted into the end of the connector body 1, and the inner diameter of the ring body 31 gradually decreases. That is, the inner diameter of the ring body 31 gradually decreases in the right direction near the right end, so that the gap between the pipe fitting 2 inserted into the end of the connector body 1 and the ring body 31 is smaller or directly abuts, thereby improving the heat exchange efficiency.

[0033] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An enhanced electrical fusion joint for heating pipes (2), characterized in that, The connector body (1) includes a heating wire (3) mounted on it. The heating wire (3) includes a ring body one (31) and a ring body two (32) located radially inside the ring body one (31). The ring body one (31) is fixedly installed on the inner wall of the connector body (1). The heating wire (3) also includes a ring body three (33) connecting the ring body one (31) and the ring body two (32). The main body (1) of the connector is provided with a protruding ring (11), and the ring body three (33) is installed on the end face of the protruding ring (11). The pipe fitting (2) is inserted into the connector body (1) so that the outer wall of the pipe fitting (2) contacts the first ring (31), one end face of the pipe fitting (2) contacts the third ring (33), and the inner wall of the pipe fitting (2) contacts the second ring (32); The connector body (1) is enclosed with a reinforcing layer (5).

2. An enhanced electrical fusion splice as claimed in claim 1, wherein, The pipe fitting (2) is inserted into the end of the connector body (1), and the inner diameter of the ring body (31) gradually decreases.

3. An enhanced electrical fusion splice as claimed in claim 1, wherein, The ring body (31) includes a contact surface (311) located on the radially inner side, the contact surface (311) abutting against the outer wall of the pipe (2).

4. An enhanced electrical fusion splice according to claim 3, wherein, The ring body (31) is provided with a groove (312), and the groove (312) and the contact surface (311) are distributed at intervals along the axial direction of the ring body (31).

5. An enhanced electrical fusion splice as set forth in claim 1, characterized in that, The diameter of the first ring (31) is larger than the diameter of the second ring (32).

6. An enhanced electrical fusion splice according to claim 1, wherein, The heating wire (3) is connected to a terminal (4), and the heating wire (3) is connected to an external power source through the terminal (4).

7. An enhanced electrical fusion splice according to claim 6, wherein, The terminal (4) is installed on the convex ring (11), and the terminal (4) is electrically connected to the ring body (33).

8. An enhanced electrical fusion splice according to claim 1, wherein, The axial length of the ring body (33) is set to 8mm-12mm.

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