PE electric smelting flange

Abstract

The utility model discloses a PE electric melting flange, which comprises a PE electric melting pipe and a matched PE flange plate, the PE electric melting pipe comprises an electric melting connecting part and an abutting part integrated with the electric melting connecting part, the PE flange plate is sleeved on the electric melting connecting part, and a resistance coil is arranged in the electric melting connecting part. The resistance coil comprises an upper resistance coil and a lower resistance coil, two groups of binding posts are fixedly connected to the electric smelting connecting part and are connected with two pole wires of the resistance coil, in addition, a ring part is fixedly connected to one end of the electric smelting connecting part, and a sealing ring is fixedly connected to the inner side face of the ring part; the inner wall of the electric smelting connecting part is fixedly connected with a plurality of sets of reinforcing rings, and an annular groove is formed between every two sets of reinforcing rings. The utility model relates to the technical field of electric melting flanges, which has the characteristics of high connection strength and good sealing performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrically fused flange, and specifically relates to a PE electrically fused flange. BACKGROUND

[0002] Polyethylene (PE) pipeline system has been widely applied to drainage, gas delivery and other fields due to its corrosion resistance, light weight, convenient construction and other advantages. In the connection of PE pipelines, electrically fused flange connection is a common way. The pipeline is connected with the pipeline by heating and melting the pipeline through the built-in resistance coil, and then the flange plate is connected with the external equipment (valve, pipeline, etc.). However, the existing PE electrically fused flange still has the following disadvantages in actual application.

[0003] 1. The traditional electrically fused flange mainly relies on the fusion surface to realize sealing, but gaps are easily generated at the contact part of the pipeline end surface and the hot-melt pipeline due to thermal deformation or uneven pressure, resulting in liquid or gas leakage, especially under the working conditions of high pressure or large temperature difference.

[0004] 2. The fusion area of the existing electrically fused flange is usually a single plane structure. After fusion, only the adhesive force formed by the fusion of the material is relied on to resist the pulling force. The mechanical locking effect is weak, the sealing performance is poor, and the connection is easily loosened or even disconnected due to external force or vibration during long-term use.

[0005] 3. The resistance coil of part of the electrically fused flange is arranged in simple parallel. Local overheating or uneven heat distribution is easily generated during heating, resulting in insufficient fusion or material degradation, which affects the connection reliability and sealing life. CONTENT OF THE UTILITY MODEL

[0006] In view of the above-mentioned deficiencies in the prior art, the utility model aims to provide a PE electrically fused flange with high connection strength and good sealing performance.

[0007] The utility model adopts the technical scheme that a PE electrically fused flange comprises a PE electrically fused pipe and a matched PE flange plate. The PE electrically fused pipe comprises an electrically fused connecting part and a contact part in an integral structure with the electrically fused connecting part. The PE flange plate is sleeved on the electrically fused connecting part. The electrically fused connecting part is internally provided with a resistance coil. Two groups of terminal posts are fixedly connected to the electrically fused connecting part. The two groups of terminal posts are connected with the two-pole lead wire of the resistance coil.

[0008] One end of the electrically fused connecting part is fixedly connected with a ring part. A sealing ring is fixedly connected to the inner side surface of the ring part. A plurality of groups of reinforcing rings are fixedly connected to the inner wall of the electrically fused connecting part. An annular groove is arranged between every two groups of reinforcing rings.

[0009] In the above technical solution, the resistance coil includes an upper resistance coil and a lower resistance coil, both of which adopt a spiral structure. The lower resistance coil is fixedly connected inside the electrofusion connection part, and the upper resistance coil is fixedly connected above the lower resistance coil inside the electrofusion connection part. The upper and lower resistance coils are staggered. One end of the upper resistance coil is connected to one end of the lower resistance coil by a wire. The other end of the upper resistance coil is connected to a set of terminal wires, and the other end of the lower resistance coil is connected to another set of terminal wires.

[0010] In the above technical solution, the cross-section of the reinforcing ring is a triangular face, and the inner wall of the reinforcing ring is an inclined surface, with the lowest point of the inclined surface close to the contact portion.

[0011] In the above technical solution, a sealing groove is provided on the outer surface of the contact part.

[0012] In the above technical solution, the outer wall of the electrofusion connection part is provided with heat dissipation grooves.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. After inserting the pipe into the electrofusion connection, the end face of the pipe should be tightly pressed against the sealing ring. This sealing ring enhances the seal between the pipe and the electrofusion connection, ensuring excellent sealing and preventing liquid leakage.

[0015] 2. Multiple sets of reinforcing rings are provided on the inner wall of the electrofusion connection part. By setting the reinforcing rings, the melting area is increased when the resistance coil generates heat for fusion, thereby improving the pull-out force and strengthening the connection strength.

[0016] 3. The resistance coils are staggered and spiral-shaped, with the upper and lower resistance coils forming a spiral. This ensures uniform melting and improves the connection and sealing effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a structural schematic diagram of the present invention from another angle;

[0019] Figure 3 This is a schematic cross-sectional view of the present invention.

[0020] Figure 4 This is a schematic diagram of the resistor coil in this utility model;

[0021] Figure 5 for Figure 3 Detailed structural diagram of part a.

[0022] In the diagram: 100PE flange, 201 electrofusion connection, 202 contact part, 203 resistance coil, 204 upper resistance ring, 205 lower resistance ring, 206 terminal block, 207 ring, 208 sealing ring, 209 reinforcing ring, 210 sealing groove, 211 heat dissipation groove. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] Please see Figures 1-5 A PE electrofusion flange includes a PE electrofusion pipe and a matching PE flange 100. The PE electrofusion pipe includes an electrofusion connection part 201 and an abutment part 202 integrally formed with the electrofusion connection part 201. The PE flange 100 is fitted onto the electrofusion connection part 201. Furthermore, a resistance coil 203 is provided inside the electrofusion connection part 201. The resistance coil 203 includes an upper resistance coil 204 and a lower resistance coil 205. Both the upper resistance coil 204 and the lower resistance coil 205 adopt a spiral structure. The lower resistance coil 205 is fixedly connected inside the electrofusion connection part 201. The upper resistance coil 204 is fixedly connected above the lower resistance coil 205 inside the electrofusion connection part 201. There is a gap between the upper resistance coil 204 and the lower resistance coil 205. The upper resistance coil 204 and the lower resistance coil 205 are staggered. One end of the upper resistance coil 204 and one end of the lower resistance coil 205 are connected by a wire.

[0025] In addition, two sets of terminals 206 are fixedly connected to the electrofusion connection part 201. The other end of the upper resistance coil 204 is connected to the wires of one set of terminals 206, and the other end of the lower resistance coil 205 is connected to the wires of the other set of terminals 206. When the terminals 206 are connected to an external power source, the external power source can supply current to the resistance coil, thereby causing the resistance coil 203 to generate heat. Through the resistance coil 203 with the above structure, the melting uniformity can be ensured.

[0026] Furthermore, a ring 207 is fixedly connected to one end of the electrofusion connection 201, and a sealing ring 208 is fixedly connected to the inner side of the ring 207. When the pipe is inserted into the electrofusion connection 201, the end face of the pipe tightly abuts against the sealing ring 208, which can enhance the sealing between the pipe and the electrofusion connection 201, ensure excellent connection sealing, and prevent liquid leakage.

[0027] Furthermore, multiple sets of reinforcing rings 209 are fixedly connected to the inner wall of the electrofusion connection part 201. An annular groove is provided between every two sets of reinforcing rings 209. The cross-section of the reinforcing ring 209 is triangular, and the inner wall of the reinforcing ring 209 is inclined. The lowest point of the inclined surface is close to the contact part 202. This makes it easier to insert the pipe into the electrofusion connection part 201 due to the inclined surface. After the insertion is completed, the heat generated by the resistance coil 203 can melt the reinforcing ring 209, increasing the melting area. The annular groove can make the molten material spread evenly, thereby improving the pull-out resistance, strengthening the connection strength, and ensuring the sealing performance.

[0028] Furthermore, a sealing groove 210 is provided on the outer side of the contact part 202, so that a sealing ring can be installed in the sealing groove 210. This ensures the sealing effect at the end after the flange is connected. In addition, a heat dissipation groove 211 is provided on the outer wall of the electrofusion connection part to increase the heat dissipation area and avoid local overheating.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A PE electrofusion flange, comprising a PE electrofusion pipe and a matching PE flange (100), characterized in that: The PE electrofusion tube includes an electrofusion connection part (201) and an abutment part (202) integrally formed with the electrofusion connection part (201). The PE flange (100) is fitted on the electrofusion connection part (201). A resistance coil (203) is provided inside the electrofusion connection part (201). Two sets of terminals (206) are fixedly connected to the electrofusion connection part (201). The two sets of terminals (206) are connected to the two pole wires of the resistance coil (203). One end of the electrofusion connection part (201) is fixedly connected to a ring part (207), and a sealing ring (208) is fixedly connected to the inner side of the ring part (207). Multiple sets of reinforcing rings (209) are fixedly connected to the inner wall of the electrofusion connection part (201), and an annular groove is provided between every two sets of reinforcing rings (209).

2. The PE electrofusion flange according to claim 1, characterized in that: The resistor coil (203) includes an upper resistor coil (204) and a lower resistor coil (205), both of which have a spiral structure. The lower resistor coil (205) is fixedly connected inside the electrofusion connection part (201), and the upper resistor coil (204) is fixedly connected above the lower resistor coil (205) inside the electrofusion connection part (201). The upper resistor coil (204) and the lower resistor coil (205) are staggered. One end of the upper resistor coil (204) is connected to one end of the lower resistor coil (205) by a wire, and the other end of the upper resistor coil (204) is connected to a set of terminals (206) by wires. The other end of the lower resistor coil (205) is connected to another set of terminals (206) by wires.

3. A PE electrofusion flange according to claim 1, characterized in that: The cross-section of the reinforcing ring (209) is triangular, and the inner wall of the reinforcing ring (209) is inclined, with the lowest point of the inclined surface close to the contact part (202).

4. A PE electrofusion flange according to claim 1, characterized in that: A sealing groove (210) is provided on the outer surface of the contact part (202).

5. A PE electrofusion flange according to claim 1, characterized in that: The outer wall of the electrofusion connection part (201) is provided with heat dissipation grooves (211).

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