Equal-diameter PE (Poly Ethylene) electric smelting straight-through joint

Abstract

The utility model relates to the technical field of pipeline connection, and provides an equal-diameter PE electric smelting straight-through connector which comprises a strength layer, an anti-seepage layer and an inner wall layer which are sequentially distributed from outside to inside. An annular resistance wire is arranged between the strength layer and the impermeable layer, and a spiral resistance wire is arranged between the impermeable layer and the inner wall layer. A double-layer arrangement structure of the inner-layer spiral main resistance wire and the outer-layer annular auxiliary resistance wire is adopted, the spiral resistance wires are spaced by the axial heating belt, the annular resistance wires are annular closed loops, axial gradient heating and radial temperature compensation are achieved, multiple sets of ribs are arranged on the outer wall of the pipe body, the tensile strength is further improved, and external impact loads are effectively dispersed.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline connection technical field especially, relate to a equal diameter PE electric melting through joint. BACKGROUND

[0002] Polyethylene (PE) pipeline is widely used in water supply and drainage, gas transmission and other fields due to its corrosion resistance, light weight, convenient construction and other advantages. As a key component of PE pipeline connection, the performance of electric melting through joint directly affects the sealing, strength and service life of the pipeline system. The traditional electric melting through joint usually adopts a single resistance wire structure, which melts the PE material through the heating of the resistance wire to realize the connection of the pipeline and the joint.

[0003] However, the prior art has the following limitations:

[0004] Insufficient heating uniformity: single resistance wire layout is prone to cause uneven axial or radial temperature distribution, resulting in local overheating or insufficient heating, which affects the welding quality. Although some joints use spiral resistance wires, gradient heating is still difficult to achieve, resulting in inconsistent strength of the melting area.

[0005] Weak anti-seepage performance: the existing joint has defects in the material or structural design of the anti-seepage layer, which may cause micro-leakage due to thermal stress or external load after long-term use, especially in environments with high pressure or large temperature difference.

[0006] Insufficient mechanical strength: the outer wall structure of the traditional joint is simple and lacks reinforcement design, which is prone to deformation or fracture under external impact or tensile load, and is difficult to meet the requirements of complex working conditions.

[0007] The present invention is based on the breakthrough of the above technical bottlenecks, and provides a more reliable solution for PE pipeline connection through innovative double-layer resistance wire layout and outer wall reinforcement structure SUMMARY

[0008] To solve the above problems, the utility model provides a equal diameter PE electric melting through joint with double-layer resistance wire heating structure to overcome the shortcomings of insufficient heating uniformity and weak anti-seepage performance of polyethylene pipeline in the prior art.

[0009] To achieve the above purpose, the utility model provides the following technical scheme:

[0010] The utility model provides a equal diameter PE electric melting through joint, including strength layer, anti -permeation layer and inner wall layer, strength layer, anti -permeation layer and inner wall layer distribute gradually from outside to inside, be equipped with annular resistance wire between strength layer and anti -permeation layer, be equipped with spiral resistance wire between anti -permeation layer and inner wall layer.

[0011] Further, the strength layer is externally provided with a conductive column, the bottom end of the conductive column extends below the anti-seepage layer and is connected with the spiral resistance wire.

[0012] Further, the strength layer is externally provided with a rib, the rib is fixedly connected to an outer wall of the PE electric melting straight-through joint.

[0013] Further, the number of the ribs is 6-10.

[0014] Beneficial effects:

[0015] According to the technical scheme, compared with the prior art, the equal-diameter PE electric melting straight-through joint adopts the double-layer arrangement structure of the inner spiral main resistance wire and the outer annular auxiliary resistance wire, the spiral resistance wire spacing is axially heated, the annular resistance wire is an annular closed loop, axial gradient heating and radial temperature compensation are realized, the pipe body outer wall is provided with a plurality of ribs, the tensile strength is further improved, and external impact load is effectively dispersed. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative labor.

[0017] Fig. 1 The drawing is a whole structure schematic diagram of the equal-diameter PE electric melting straight-through joint of the present application;

[0018] Fig. 2 The drawing is a distribution structure schematic diagram of the spiral resistance wire of the present application;

[0019] Fig. 3 The drawing is a distribution structure schematic diagram of the annular resistance wire of the present application;

[0020] Fig. 4 The drawing is a front view structure plane schematic diagram of the present application;

[0021] In the drawing: 1 strength layer, 2 anti-seepage layer, 3 inner wall layer, 4 conductive column, 5 rib, 6 spiral resistance wire, 7 annular resistance wire DETAILED DESCRIPTION

[0022] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0024] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0025] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] Embodiment 1

[0027] From Figs. 1-4 As can be seen from the utility model, the utility model provides a equal diameter PE electric melting through joint, including strength layer 1, impermeable layer 2 and inner wall layer 3, strength layer 1, impermeable layer 2 and inner wall layer 3 distribute gradually from outside to inside. Strength layer 1 and inner wall layer 3 all adopt PE material, impermeable layer 2 adopts polyethylene-polyvinyl alcohol copolymer material.

[0028] Spiral resistance wire 6 is arranged between impermeable layer 2 and inner wall layer 3, spiral resistance wire 6 is main resistance wire, and is prepared from nickel-chromium alloy, and the spacing of spiral resistance wire 6 is 3mm, forming axial heating band.

[0029] The annular resistance wire 7 is arranged between the strength layer 1 and the anti-seepage layer 2, is an auxiliary resistance wire, is made of copper-nickel alloy, and is provided with an annular closed loop every 20 mm.

[0030] The conductive column 4 is arranged outside the strength layer 1, and the bottom end of the conductive column 4 extends below the anti-seepage layer 2 and is connected with the spiral resistance wire 6.

[0031] The rib 5 is arranged outside the strength layer 1, is fixedly connected to an outer wall of the PE electric fusion straight-through joint, and is embedded with a carbon fiber reinforcing rib inside, so that the tensile strength and impact resistance of the PE electric fusion straight-through joint are improved.

[0032] The utility model provides a kind of equal-diameter PE electric fusion straight-through joint, including strength layer, anti-seepage layer and inner wall layer, the strength layer, anti-seepage layer and inner wall layer are sequentially distributed from outside to inside;Annular resistance wire is arranged between the strength layer and the anti-seepage layer, and spiral resistance wire is arranged between the anti-seepage layer and the inner wall layer.Using the double-layer arrangement structure of inner layer spiral main resistance wire and outer layer annular auxiliary resistance wire, spiral resistance wire spacing axial heating zone, annular resistance wire is annular closed loop, realizes axial gradient heating and radial temperature compensation, and multiple groups of ribs are arranged on the outer wall of pipe body, to further improve tensile strength, and effectively disperse external impact load.

[0033] The above description of the disclosed embodiments enables those skilled in the art to carry out or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An equal diameter PE electrofusion straight-through joint, characterized in that, It includes strength layer (1), anti-permeable layer (2) and inner wall layer (3), the strength layer (1), anti-permeable layer (2) and inner wall layer (3) are sequentially distributed from outside to inside;Annular resistance wire (7) is arranged between the strength layer (1) and the anti-permeable layer (2), and spiral resistance wire (6) is arranged between the anti-permeable layer (2) and the inner wall layer (3).

2. An equal PE electrofusion inline joint according to claim 1, characterised in that, The outer portion of the strength layer (1) is provided with a conductive column (4), and the bottom end of the conductive column (4) extends below the anti-permeable layer (2) and is connected with the spiral resistance wire (6).

3. An equal PE electrofusion inline joint according to claim 1, characterised in that, The outer portion of the strength layer (1) is provided with a rib (5), and the rib (5) is fixedly connected to an outer wall of the PE electric fusion straight-through joint.

4. An equal PE electrofusion inline coupling according to claim 3, characterised in that, The number of the rib (5) is 6-10.

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