An electrically fused pipe joint having short circuit prevention

Abstract

The application discloses an electrically fused pipe joint with a short-circuit prevention function, which comprises a pipe joint body and a metal hot fuse, the metal hot fuse is sleeved on the pipe joint body; an insulating gasket is further sleeved on the pipe joint body, and the insulating gasket is used for isolating the metal hot fuse from a steel layer of an external pipe to be connected; in use, the insulating gasket is tightly attached to an end surface of the external pipe to be connected, so that the end surface of the external pipe to be connected is closed, and then a unique exposed point of the steel layer of the external pipe to be connected is closed, short circuit caused by contact between the metal hot fuse and the steel layer is avoided, and stability and reliability of hot melting are improved; meanwhile, the application can achieve the above-mentioned purpose through one insulating gasket, the structure of the pipe joint is simplified to the maximum extent, and the cost is reduced; meanwhile, the whole device is simple in mounting mode and convenient in operation, and is favorable for improving the connection efficiency of the pipe.

Description

Technical Field

[0001] This application relates to the field of drainage pipeline technology, specifically to an electrofusion pipe joint with short-circuit protection function. Background Technology

[0002] Water leakage at the ends of composite pipes is a pain point in the industry. Adding a sealing process to the ends of composite pipes is a common solution. In the existing technology, the solution with better sealing effect is to seal the edges with special pipe sealing equipment. However, this solution is not efficient, not convenient, and cannot be applied to on-site pipe breakage, emergency repairs, etc. Existing technologies also use hot-melt pipe structures to achieve edge sealing and pipe connection, but during the sealing process, the heated copper wire will come into direct contact with the steel layer of the composite pipe, which may cause a short circuit risk and pose certain safety hazards. Utility Model Content

[0003] The main objective of this application is to provide an electrofusion pipe joint with short-circuit protection function, which aims to solve the defect that short circuits are prone to occur during the pipe sealing process in the prior art.

[0004] This application achieves the above objectives through the following technical solutions: An electrofusion fitting with short-circuit protection function, comprising a fitting body; A hot-melt wire is fitted onto the pipe fitting body; An insulating washer is fitted onto the pipe fitting body and is used to isolate the hot-melt wire from the steel layer of the external pipe to be connected.

[0005] Optionally, the pipe fitting body is provided with a mounting groove, which is arranged in a spiral shape on the outer peripheral surface of the pipe fitting body along the axial direction of the pipe fitting body; one end of the mounting groove is closed, and the other end is provided with a guide port for leading out the hot melt wire.

[0006] Optionally, the angle between the axis of the guide port and the axis of the pipe fitting body is 40°-50°; the depth of the mounting groove is 1.1-1.3 times the diameter of the hot melt wire; and the width of the mounting groove is 0.1-0.3 mm larger than the diameter of the hot melt wire.

[0007] Optionally, the angle between the axis of the guide port and the axis of the pipe fitting body is 45°; the depth of the mounting groove is 1.2 times the diameter of the hot melt wire.

[0008] Optionally, along the axial direction of the pipe fitting body, the length of the mounting groove on the outer peripheral surface of the pipe fitting body is not less than 10 mm.

[0009] Optionally, the outer diameter of the insulating washer is the same as the outer diameter of the external pipe to be connected; the thickness of the insulating washer is not less than 3mm.

[0010] Optionally, along the insertion direction of the insulating washer, the inner surface of the insulating washer is also provided with a guide cone surface at an angle.

[0011] Optionally, the pipe fitting body is also provided with an inclined drainage surface for guiding fluid.

[0012] Optionally, the pipe fitting body includes an outer section and a socket section, wherein the outer section and the socket section are integrally and coaxially connected; the connection area between the outer section and the socket section is also provided with a limiting end face adapted to the insulating gasket.

[0013] Optionally, the mounting groove is arranged on the outer peripheral surface of the socket section, the guide port is provided on the outer section, and the guide port is in communication with the mounting groove.

[0014] Compared with the prior art, this application has the following beneficial effects: This application includes a pipe fitting body and a metal hot-melt wire, the metal hot-melt wire being sleeved on the pipe fitting body; an insulating washer is also sleeved on the pipe fitting body, the insulating washer being used to isolate the metal hot-melt wire from the steel layer of the external pipe to be connected; In use, the end of the pipe fitting body with the metal hot melt wire is inserted into the external pipe to be connected. After insertion, the insulating washer is tightly fitted to the end face of the external pipe to be connected along the axial direction of the pipe fitting body, thereby sealing the end face of the external pipe to be connected and sealing the only exposed point of the steel layer of the external pipe to be connected. This prevents the metal hot melt wire from contacting the steel layer and causing a short circuit, thus improving the stability and reliability of the hot melt process. Secondly, this application achieves the above objectives with just an insulating gasket, which simplifies the structure of the pipe joint to the greatest extent and reduces its cost; at the same time, the entire device is easy to install and operate, which helps to improve the connection efficiency of the pipeline. Attached Figure Description

[0015] Figure 1 A schematic diagram of an electrofusion tube connector with short-circuit protection function provided in Embodiment 1 of this application; Figure 2 A cross-sectional view of an electrofusion tube connector with short-circuit protection function provided for Embodiment 1 of this application; Figure 3 A connection diagram of an electrofusion tube connector with short-circuit protection function provided in Embodiment 1 of this application; Reference numerals: 1-pipe fitting body, 2-metal hot melt wire, 3-insulating washer, 4-mounting groove, 5-guide port, 6-guide cone surface, 7-draining surface, 101-external section, 102-socket section, 103-limiting end face.

[0016] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0017] 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.

[0018] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0021] Implementation Method 1 Reference Figures 1 to 3 This embodiment, as an optional embodiment of this application, discloses an electrofusion connector with short-circuit protection function, including a connector body 1. The connector body 1 includes an outer section 101 and a plug section. The outer section 101 and the plug section are coaxially arranged and integrally connected. The connection area between the outer section 101 and the socket section 102 is also provided with a limiting end face 103. Specifically, the limiting end face 103 is a stepped surface. Furthermore, a flow-guiding surface 7 for guiding fluid is also inclinedly provided on the inner wall of the free end of the socket section 102; Furthermore, an installation groove 4 is provided on the outer peripheral surface of the socket section 102. The installation groove 4 has a spiral structure and is coaxially arranged with the socket section 102. The cross-section of the installation groove 4 has a U-shaped structure with an opening at the top. A guide port 5 is also provided on the outer section 101. Along the axial direction of the socket section 102, one end of the installation groove 4 opposite to the free end of the socket section 102 is closed, and the other end is connected to the guide port 5. Furthermore, the electrofusion fitting also includes a hot-melt wire 2, which is made of oxygen-free copper and is embedded in the mounting groove 4; the guide port 5 is inclined, and the angle between the axis of the guide port 5 and the axis of the fitting body 1 is 40°-50°; along the radial direction of the socket section 102, the depth of the mounting groove 4 is 1.1-1.3 times the diameter of the hot-melt wire 2; Preferably, the angle between the axis of the guide port 5 and the axis of the pipe fitting body 1 is 45°; the depth of the mounting groove 4 is 1.2 times the diameter of the hot melt wire 2; the width of the mounting groove 4 is 0.1-0.3 mm larger than the diameter of the hot melt wire 2; along the axial direction of the pipe fitting body 1, the length of the mounting groove 4 on the outer circumferential surface of the socket section 102 is not less than 10 mm. By adjusting the above-mentioned dimensional parameters, it can be ensured that the hot-melt metal wire 2 is stably inserted into the mounting groove 4, thus ensuring the stability of its installation. One end of the hot melt wire 2 passes through the guide port 5, and the inclined guide port 5 can prevent the hot melt wire 2 from bending. Furthermore, the electrofusion pipe joint also includes an insulating washer 3, which is generally in the form of a circular ring structure. The insulating washer 3 is sleeved on the socket section 102 and is in close contact with the limiting end face 103 along the axial direction of the pipe joint body 1. The outer diameter of the insulating washer 3 is the same as the outer diameter of the external pipe to be connected; the thickness of the insulating washer 3 is not less than 3mm; the inner wall of the insulating washer 3 is interference-fitted or fully fitted with the outer wall of the socket section 102; Accordingly, this application also discloses a method for manufacturing the above-mentioned electrofusion pipe joint, which firstly manufactures the pipe joint body 1 using a mold; The pipe fitting body 1 is then mounted on a lathe, and the mounting groove 4 is machined on the outer surface of the socket section 102 by the lathe, and then the guide port 5 is cut out. After the mounting groove 4 is processed, the hot melt wire 2 is embedded into the mounting groove 4, and one end of the hot melt wire 2 is led out from the guide port 5. Then, the insulating washer 3 is placed on the socket section 102, and along the axial direction of the pipe joint body 1, the insulating washer 3 is tightly fitted with the limiting end face 103; In use, the end of the pipe fitting body with the metal hot melt wire is inserted into the external pipe to be connected. After insertion, the insulating washer is tightly fitted to the end face of the external pipe to be connected along the axial direction of the pipe fitting body, thereby sealing the end face of the external pipe to be connected and sealing the only exposed point of the steel layer of the external pipe to be connected. This prevents the metal hot melt wire from contacting the steel layer and causing a short circuit, thus improving the stability and reliability of the hot melt process. Secondly, this application achieves the above objectives with just an insulating gasket, which simplifies the structure of the pipe joint to the greatest extent and reduces its cost; at the same time, the entire device is easy to install and operate, which helps to improve the connection efficiency of the pipeline.

[0022] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An electric fusion pipe joint having a short circuit prevention function, characterized by comprising: Includes the pipe fitting body (1); A hot-melt wire (2) is fitted onto the pipe fitting body (1); An insulating washer (3) is fitted onto the pipe fitting body (1). The insulating washer (3) is used to isolate the metal hot melt wire (2) from the steel layer of the external pipe to be connected.

2. An electric fusion pipe joint having a short circuit prevention function according to claim 1, characterized in that, The pipe connector body (1) is provided with an installation groove (4). Along the axial direction of the pipe connector body (1), the installation groove (4) is arranged in a spiral structure on the outer circumferential surface of the pipe connector body (1). One end of the installation groove (4) is closed, and the other end is provided with a guide port (5) for leading out the metal hot melt wire (2).

3. An electric fusion pipe joint having a short circuit prevention function according to claim 2, wherein The angle between the axis of the guide port (5) and the axis of the pipe fitting body (1) is 40°-50°; the depth of the mounting groove (4) is 1.1-1.3 times the diameter of the hot melt wire (2); the width of the mounting groove (4) is 0.1-0.3 mm larger than the diameter of the hot melt wire (2).

4. An electric fusion pipe joint having a short circuit prevention function according to claim 3, characterized in that, The angle between the axis of the guide port (5) and the axis of the pipe fitting body (1) is 45°; the depth of the mounting groove (4) is 1.2 times the diameter of the hot melt wire (2).

5. The electric fusion pipe joint with short circuit prevention function according to claim 2, characterized in that, Along the axial direction of the pipe fitting body (1), the length of the mounting groove (4) on the outer circumferential surface of the pipe fitting body (1) is not less than 10 mm.

6. The electric fusion pipe joint with short circuit prevention function according to claim 1, characterized in that, The outer diameter of the insulating washer (3) is the same as the outer diameter of the external pipe to be connected; the thickness of the insulating washer (3) is not less than 3mm.

7. An electric fusion pipe joint with short circuit prevention function according to claim 1 or 6, wherein Along the insertion direction of the insulating washer (3), the inner surface of the insulating washer (3) is also provided with an inclined guide cone surface (6).

8. The electric fusion pipe joint with short circuit prevention function according to claim 1, characterized in that, The pipe fitting body (1) is also provided with an inclined drainage surface (7) for guiding fluid.

9. The electric fusion pipe joint with short circuit prevention function according to claim 2, characterized in that, The pipe fitting body (1) includes an outer section (101) and a socket section (102), the outer section (101) and the socket section (102) are integrally and coaxially connected; the connection area between the outer section (101) and the socket section (102) is also provided with a limiting end face (103) adapted to the insulating gasket (3).

10. An electric fusion pipe joint having a short circuit prevention function according to claim 9, wherein The mounting groove (4) is arranged on the outer peripheral surface of the socket section (102), and the guide port (5) is provided on the outer section (101). The guide port (5) is connected to the mounting groove (4).

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