Terminal pin structure of PE (Poly Ethylene) electric melting pipe fitting

Abstract

The utility model provides a terminal pin structure of a PE electric melting pipe fitting, and belongs to the technical field of electric melting pipe fittings. The problem of how to improve the protection effect on the terminal pin is solved. In the terminal pin structure of the PE electric melting pipe fitting, the PE electric melting pipe fitting comprises a pipe body, the terminal pin structure comprises a body with a wiring section and a connecting section, the pipe body is provided with a connecting seat, and the body is provided with a protective sleeve arranged around the wiring section. A wiring gap for accommodating a wire is formed between the inner peripheral wall of the protective sleeve and the outer peripheral wall of the wiring section, and the connecting section is detachably connected with the connecting seat. According to the terminal pin structure of the PE electric melting pipe fitting, the protection effect on the terminal pin can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrofusion pipe fittings, and relates to a terminal pin structure of a PE electrofusion pipe fitting. Background Art

[0002] Electrofusion pipe fittings are pipe fittings applied to the gas pipeline field in current life. Electric heating wires are arranged on the inner wall of the pipe fittings. During construction, by energizing the electric heating wires to heat, the socket and spigot parts of the electrofusion pipe fittings and the connecting pipe fittings are fused into one body at a high temperature to ensure that the quality of the formed pipeline meets the requirements. At present, electrofusion pipe fittings are generally produced by injection molding, and copper terminal pins connected to the electric heating wires are arranged on the outer wall of the pipe fittings. During subsequent construction, the copper terminal pins are energized to realize energizing and heating of the electric heating wires.

[0003] In the prior art, the copper terminal pins are often integrally injection-molded with the electrofusion pipe fittings. However, during transportation and installation, the copper terminal pins may be impacted, causing the copper terminal pins to bend and deform, and in severe cases, they may even break, which has a great impact on the subsequent pipeline laying work. Summary of the Invention

[0004] The purpose of the utility model is to propose a terminal pin structure of a PE electrofusion pipe fitting in view of the above problems existing in the prior art. The technical problem to be solved by the utility model is: how to improve the protection effect on the terminal pins.

[0005] The purpose of the utility model can be achieved by the following technical solutions: A terminal pin structure of a PE electrofusion pipe fitting, the PE electrofusion pipe fitting includes a pipe body, and the terminal pin structure includes a body having a wiring section and a connecting section. The characteristic is that a connecting seat is arranged on the pipe body, a protective sleeve is arranged on the body around the wiring section, a wiring gap for accommodating a wire is formed between the inner peripheral wall of the protective sleeve and the outer peripheral wall of the wiring section, and the connecting section is detachably connected to the connecting seat.

[0006] Compared with the prior art, the terminal pin structure of this PE electrofusion fitting sets up a connecting seat on the pipe body, connects the connecting seat with the electric heating wire arranged in the body, and uses a detachable connection method to detachably connect the connecting section of the body and the connecting seat. While ensuring the stable connection between the terminal pin and the connecting seat, the wire can be inserted into the wiring gap later to connect with the wiring section of the body, so as to achieve the purpose of supplying power to the electric heating wire arranged in the pipe body. And by arranging a protective sleeve around the wiring section on the body, the wiring section of the body can be fully protected. Since the connecting section and the connecting seat are assembled in a detachable connection manner, when a defect is found in the structure of the body or the protective sleeve during pipeline laying, the body together with the protective sleeve can be detached from the pipe body and replaced separately, without discarding the entire electrofusion fitting, thus achieving the effect of reducing the installation cost. After completing the pipeline laying task, the construction personnel can detach the body together with the protective sleeve from the pipe body according to the needs. As a general part in this field, it can be repeatedly used in cooperation with different pipe bodies. In addition, it is worth mentioning that during production and manufacturing, the electrofusion fitting can be disassembled into parts as a whole, the pipe body and the body connected with the protective sleeve can be manufactured separately according to the actual situation, and then the two can be assembled, which can effectively improve the overall production efficiency of the electrofusion fitting.

[0007] In the terminal pin structure of the above-mentioned PE electrofusion fitting, the body is in a long strip shape with one end being the wiring section and the other end being the connecting section. There is a circumferential annular groove on the outer side wall of the body near the middle, and the protective sleeve is integrally formed by injection molding with the groove wall of the annular groove. The way of integrally forming the body and the protective sleeve by injection molding is to ensure the structural firmness between the two, and through the setting of the annular groove, the contact area between the body and the protective sleeve is ensured, and then the connection strength between the two is ensured.

[0008] In the terminal pin structure of the above-mentioned PE electrofusion fitting, there are two annular plates on the outer side wall of the body near the middle along the circumferential direction, and the two annular plates are arranged at intervals along the axial direction of the body, and the annular groove is formed between the two annular plates. The annular groove is specifically formed by the cooperation of the two annular plates and the outer peripheral wall of the middle part of the body, so as to avoid the influence of the setting of the annular groove on the structural strength of the body itself. And through the setting of the two annular plates, when the body and the protective sleeve are injection molded into one body, the contact area between the body and the protective sleeve can be further increased, thereby further ensuring the connection strength between the two. As an alternative solution, the body and the protective sleeve can also be combined into one body by hot melting.

[0009] In the terminal pin structure of the above-mentioned PE electrofusion fitting, the connecting seat is injection molded on the outer wall of the pipe body, and the connecting section is screwed to the connecting seat. As an alternative solution, the connecting seat can also be fixed on the outer wall of the pipe body by hot melting.

[0010] In the terminal pin structure of the above-mentioned PE electrofusion fitting, a protective boss is provided on the outer wall of the pipe body around the connection seat, and the end face of the protective boss is flush with the outer end face of the connection seat. Through this setting, the protective boss can be effectively prevented from being impacted by external objects.

[0011] Compared with the prior art, the terminal pin structure of this PE electrofusion fitting has the following advantages:

[0012] 1. A connection seat for connecting an electric heating wire is provided on the pipe body, and the connection section of the body is connected to the connection seat in a detachable connection manner. While ensuring firm connection, the wiring end of the body is protected by a protective sleeve formed on the body.

[0013] 2. The body with a protective sleeve and the pipe body provided with a connection seat can be separately produced and then reassembled, effectively reducing the production difficulty, achieving the effects of reducing production costs and improving production efficiency.

[0014] 3. After the pipeline is laid, the body together with the protective sleeve can be removed from the pipe body and reused, improving the utilization rate of the terminal pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the terminal pin structure of this PE electrofusion fitting.

[0016] Figure 2 is a sectional view and a partial enlarged view of the terminal pin structure of this PE electrofusion fitting.

[0017] Figure 3 is a schematic structural diagram of the body.

[0018] Figure 4 is a schematic structural diagram and a partial enlarged view of the pipe body.

[0019] In the figure, 1. Pipe body; 11. Connection seat; 12. Protective boss; 2. Body; 21. Wiring section; 22. Connection section; 23. Protective sleeve; 24. Annular groove; 25. Annular plate; 3. Wiring gap. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following are specific embodiments of the present invention in combination with the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0021] Such as Figure 2 And Figure 4As shown, in the terminal pin structure of the present PE electric fusion pipe fitting, the PE electric fusion pipe fitting comprises a pipe body 1 with an electric heating wire arranged inside (the electric heating wire is not shown in the figure of this case), and connecting seats 11 are provided at both ends of the side wall of the pipe body 1. The connecting seat 11 is made of copper alloy and has good conductivity. It is integrally formed with the pipe body 1 by injection molding and is connected to the electric heating wire in the pipe body 1. A protective boss 12 is injection molded around the connecting seat 11 at both ends of the outer wall of the pipe body 1, and the end face of the protective boss 12 is flush with the outer end face of the connecting seat 11.

[0022] Combination Figure 1 and Figure 3 As shown, the terminal pin structure includes a body 2 which is in the shape of an elongated strip and is made of copper alloy, one end of the body 2 is a connecting section 22, and the other end is a wiring section 21, the connecting seat 11 is connected to the connecting seat 11 by screwing or clamping, and the wiring terminal user is connected to an external power source through a wire to achieve the purpose of powering the heating wire in the phase tube body 1, and two circular annular plates 25 are provided along the circumferential direction on the middle outer wall of the body 2 between the two ends, and an annular groove 24 is formed between the two annular plates 25 and the outer peripheral wall of the body 2, and a protective cover 23 arranged around the wiring section 21 is also formed on the body 2 by injection molding, and a wiring gap 3 for accommodating the wire is formed between the inner peripheral wall of the protective cover 23 and the outer peripheral wall of the wiring section, and the protective cover 23 is specifically injection molded as a whole with the two annular plates 25 and the groove wall of the annular groove 24.

[0023] During assembly, the construction personnel only need to screw the connecting section 22 of the main body 2 with the connecting seat 11 so that the connecting seat 11 is hidden in the connecting seat 11 and the end of the protective cover 23 is abutted against the end face of the protective platform. Conversely, the main body 2 can be removed from the tube body 1 together with the protective cover 23 by simply screwing it in the reverse direction to disengage the thread limit. During construction, the external wire can be extended into the wiring gap 3 to connect with the wiring section 21 of the main body 2, so that current can be transmitted to the heating wire arranged in the tube body 1 through the cooperation of the main body 2 and the connecting seat 11.

[0024] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0025] Although the terms such as tube body 1, connecting base 11, protective boss 12, body 2, wiring section 21, connecting section 22, protective sleeve 23, annular groove 24, annular plate 25, wiring gap 3 are used more frequently in this text, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the essence of the present utility model; interpreting them as any kind of additional limitation is contrary to the spirit of the present utility model.

Claims

1. A terminal pin structure of a PE electric fusion pipe fitting, the PE electric fusion pipe fitting comprising a pipe body (1), the terminal pin structure comprising a body (2) having a wiring section (21) and a connecting section (22), characterized in that: The tube body (1) is provided with a connection seat (11), the main body (2) is provided with a protective sleeve (23) arranged around the wiring section (21), a wiring gap (3) for accommodating a wire is formed between the inner peripheral wall of the protective sleeve (23) and the outer peripheral wall of the wiring section (21), and the connection section (22) is detachably connected to the connection seat (11).

2. The terminal pin structure of the PE electric fusion pipe fitting according to claim 1, characterized in that: The body (2) is in the shape of an elongated strip and has a wiring section (21) at one end and a connecting section (22) at the other end. The body (2) has an annular groove (24) along the circumferential direction on the outer side wall near the middle portion. The protective sleeve (23) and the groove wall of the annular groove (24) are integrally formed by injection molding.

3. The terminal pin structure of the PE electric fusion pipe fitting according to claim 2, characterized in that: The body (2) has two annular plates (25) along the circumferential direction on the outer side wall near the middle portion, and the two annular plates (25) are arranged axially spaced apart from each other along the body (2), and the annular groove (24) is formed between the two annular plates (25).

4. The terminal pin structure of the PE electric fusion pipe fitting according to any one of claims 1 to 3, characterized in that: The connecting seat (11) is injection-molded on the outer wall of the tube body (1), and the connecting section (22) is threadedly connected to the connecting seat (11).

5. The terminal pin structure of the PE electric fusion pipe fitting according to claim 4, characterized in that: The outer wall of the tube body (1) is provided with a protective boss (12) arranged around the connecting seat (11), and the end surface of the protective boss (12) is flush with the outer end surface of the connecting seat (11).

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