Electric melting pipe fitting without setting welding time

Abstract

The utility model discloses an electric melting pipe fitting without setting welding time, and belongs to the technical field of electric melting pipe fittings. The pipe fitting comprises a pipe fitting body, the outer side wall of the pipe fitting body is provided with an electrode tip and a temperature sensing electronic element which can be fused when the sensed temperature reaches the set temperature, a resistance wire is embedded in the inner side wall of the pipe fitting body, one end of the resistance wire is connected with the electrode tip, and the other end of the resistance wire is connected with the temperature sensing electronic element; the outer side wall of the pipe fitting body is further provided with an observation hole used for conducting visual inspection on the welding fusion welding area. Welding time does not need to be set, welding can be carried out only by setting welding voltage, automatic circuit breaking can be carried out after welding meets the requirement, secondary welding cannot be carried out, and the conditions of over welding and under welding can be avoided at the same time; a convenient mounting position and a wiring position between the resistance wire and the temperature-sensitive electronic element can be provided for the temperature-sensitive electronic element; and the protection can be provided for electric connection parts such as a resistance wire and a binding post on the wiring terminal.

Description

Technical Field

[0001] This utility model belongs to the technical field of electrofusion fittings, specifically relating to an electrofusion fitting that eliminates the need for welding time settings. Background Technology

[0002] Electrofusion fittings are an important connection method for plastic pipes, and the quality of their welding directly affects the actual service life of the pipes. Electrofusion fittings contain a resistance wire inside; when energized, the resistance wire heats up to provide heat for welding the fitting to the pipe. Therefore, welding parameter barcodes (including welding voltage and welding time) are affixed to electrofusion fittings for welding machine identification or manual parameter setting to achieve the desired welding result.

[0003] The amount of heat output during welding is affected by the actual output voltage and time of the welding machine. If the welding machine output is unstable, reliable welding quality cannot be guaranteed. At the same time, even if the welding machine output is normal, the amount of molten material generated by the fittings and pipes is still affected by factors such as ambient temperature. When the ambient temperature changes significantly, the welding machine will make corresponding compensations. However, since it cannot make precise compensation based on the heating conditions of the material itself, over-welding or under-welding may occur.

[0004] Existing electrofusion fittings typically use the height of the pointer protruding from the observation hole as a welding indicator, but this cannot accurately indicate whether the welding is completed normally. Some construction workers perform multiple welding operations based on their construction experience, causing the fitting connections to be subjected to excessive heat and resulting in high-temperature carbonization of the material. Utility Model Content

[0005] In view of the above-mentioned problems in the prior art, the purpose of this utility model is to provide an electrofusion fitting that eliminates the need for welding time settings.

[0006] This utility model provides the following technical solution: an electrofusion fitting that eliminates the need for welding time setting, comprising a fitting body, an electrode head and a temperature-sensing electronic element that melts when the sensed temperature reaches a set temperature are provided on the outer wall of the fitting body, a resistance wire is embedded in the inner wall of the fitting body, one end of the resistance wire is connected to the electrode head and the other end is connected to the temperature-sensing electronic element; the outer wall of the fitting body is also provided with an observation hole for visually inspecting the welding fusion zone.

[0007] Furthermore, an electrode hole is provided on the side wall of one end of the pipe body, and a wiring hole, a pre-fabricated hole and a mounting hole are provided on the side wall of the other end; an electrode head is provided in the electrode hole; a first wiring terminal and a second wiring terminal are respectively provided in the wiring hole and the pre-fabricated hole; and a temperature sensing electronic component is provided in the mounting hole.

[0008] Furthermore, one end of the resistance wire is connected to the electrode head, and the other end is connected to the first terminal along with the wire on one side of the temperature sensing electronic element. The wire on the other side of the temperature sensing electronic element is connected to the second terminal.

[0009] Furthermore, the resistance wire is embedded in the inner wall of the pipe body in a spiral shape according to the set pitch.

[0010] Furthermore, one side of the mounting hole is open to facilitate the installation of temperature-sensing electronic components; the mounting hole is connected to two wiring holes to facilitate wire routing.

[0011] Furthermore, a protective cap is provided on the outside of the first terminal block, and a plastic electrode is provided on the outside of the second terminal block; an electrode head protection structure extending outward to protect the electrode head is provided on the body of the fitting at the electrode head; and a sealing element is provided on the opening side of the mounting hole.

[0012] By adopting the above-mentioned technology, the beneficial effects of this utility model compared with the prior art are as follows:

[0013] 1) Based on the structural design of the pipe body and the setting of temperature sensing electronic components, this utility model does not require setting the welding time, but only setting the welding voltage. After the welding meets the requirements, it can automatically disconnect the circuit and cannot be welded again. It can avoid over-welding and under-welding at the same time.

[0014] 2) In this utility model, based on the structural design of the pipe body, a convenient installation position for the temperature sensing electronic component and the wiring position between the resistance wire and the temperature sensing electronic component can be provided.

[0015] 3) In this utility model, the protective cap, plastic electrode, electrode head protective structure and sealing component can provide protection for electrical connection components such as resistance wire and terminal block.

[0016] 4) In this utility model, based on the set tube cleaning hole, it is possible to visually inspect whether welding has been performed and the welding quality, which is convenient for production line process monitoring. Attached Figure Description

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

[0018] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0019] Figure 3 Schematic diagram of the internal structure of the pipe fitting body of this utility model;

[0020] Figure 4 for Figure 3Enlarged structural diagram at point B;

[0021] Figure 5 A schematic diagram of the structure of the temperature-sensing electronic component of this utility model;

[0022] Figure 6 A schematic diagram of the structure of the wiring terminal of this utility model;

[0023] Figure 7 This is a schematic diagram of the structure of the plastic electrode of this utility model;

[0024] Figure 8 This is a schematic diagram of the structure of the protective cap of this utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0026] Conversely, this utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model as defined in the claims. Furthermore, to provide the public with a better understanding of this utility model, certain specific details are described in detail in the following description. However, those skilled in the art will fully understand this utility model even without these detailed descriptions.

[0027] Please see Figure 1-8 An electrofusion fitting that eliminates the need for welding time settings includes a resistance wire 1, a fitting body 2, a temperature-sensing electronic component 3, an electrode head 4, a first terminal block 5, a second terminal block 6, a protective cap 7, a plastic electrode 8, and a sealing component 10.

[0028] Specifically, an electrode hole 2-2 and an observation hole 2-1 are provided on the outer wall of one end of the pipe body 2, which are arranged radially. The electrode hole 2-2 is connected to the inside of the pipe body 2, and the electrode head 4 is fixedly placed in the electrode hole 2-2.

[0029] The observation hole 2-1 is designed to facilitate visual inspection of the welded area, so as to observe whether the pipe fitting is welded and the quality of the weld.

[0030] Specifically, the outer wall of the other end of the pipe fitting body 2 is provided with a wiring hole 2-3 arranged radially, a pre-fabricated hole 2-4 and an installation hole 2-5 arranged axially; the wiring hole 2-3 and the pre-fabricated hole 2-4 are both connected to the interior of the pipe fitting body 2.

[0031] The first terminal 5 and the second terminal 6 are respectively located in the wiring hole 2-3 and the pre-made hole 2-4.

[0032] The mounting hole 2-5 has an open structure on one side, which is connected to the wiring hole 2-3 and the prefabricated hole 2-4 respectively; the temperature sensing electronic component 3 is inserted into the mounting hole 2-5 through the open side of the mounting hole 2-5 and placed inside the mounting hole 2-5.

[0033] Specifically, the resistance wire 1 is spirally embedded in the inner wall of the tube body 2 according to the set pitch. One end is connected to the electrode head 4, and the other end is connected to the first terminal 5 together with the left wire 3-1 of the temperature sensing electronic element 3; the right wire 3-3 of the temperature sensing electronic element 3 is connected to the second terminal 6.

[0034] Specifically, an oil protective cap 7 is welded above electrode hole 2-2 to protect the connector. A plastic electrode 8 is welded at pre-drilled hole 2-4 to protect the terminal block. A sealing element 10 is inserted into the side of the fitting body 2 at the opening of mounting hole 2-5 to prevent the resistance wire from being exposed; the sealing element 10 is a rubber plug.

[0035] In this embodiment, during pipe assembly, the temperature-sensing electronic component 3 is inserted into the mounting hole 2-5 on the side of the pipe body 2, all the way to the pre-drilled hole 2-4. A hook tool is used to hook the right-side wire 3-3 of the temperature-sensing electronic component 3 out of the hole, as well as one end of the resistance wire 1 at the electrode hole and the left-side wire 3-1 of the temperature-sensing electronic component 3. The resistance wires hooked out of the holes and the left-side wire 3-1 of the temperature-sensing electronic component 3 are securely connected via the first terminal block 5, and excess material is removed. The right-side wire 3-3 of the temperature-sensing electronic component 3 is then inserted into the second terminal block 6; the second terminal block 6 is then inserted into the pre-drilled hole 2-4, and the second terminal block 6 and the wire are then securely connected.

[0036] Then, weld the protective cap 1-7 above the wiring hole 2-3. Weld the plastic electrode 1-4 at the pre-drilled hole 2-4, and insert a rubber plug into the side of the fitting body 2 at the opening of the mounting hole 2-5.

[0037] When welding this pipe fitting, the electrodes connected to both ends of the resistance wire 1 are energized by an external power source. Welding can be started simply by setting the required welding voltage. After welding, the molten material inside the pipe fitting is fully fused. Once the temperature reaches the set value, the temperature-sensing electronic component 3 disconnects the resistance wire from the external circuit, and the welding is complete. The construction operation is simple, the pipe fitting is welded in one go, avoiding secondary welding, and is safe and reliable.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A solder-free time set electrofusion fitting, characterised in that, The utility model provides a kind of pipe fitting, including pipe fitting body (2), electrode head (4) and temperature sensing electronic element (3) that can be fused when inductive temperature reaches set temperature are arranged on the outer side wall of pipe fitting body (2), resistance wire (1) is embedded on the inner side wall of pipe fitting body (2), one end of resistance wire (1) is connected with electrode head (4), and the other end is connected with temperature sensing electronic element (3);The outer side wall of pipe fitting body (2) is further provided with observation hole (2-1) for visual inspection of welding fusion area.

2. An electrically fused pipe fitting of the no-wait-time setting type according to claim 1, characterized in that, The side wall of one end of the pipe fitting body (2) is provided with an electrode hole (2-2), and the side wall of the other end is provided with a wiring hole (2-3), a prefabricated hole (2-4), and a mounting hole (2-5). The electrode hole (2-2) is provided with an electrode head (4). The wiring hole (2-3) and the prefabricated hole (2-4) are respectively provided with a first wiring terminal (5) and a second wiring terminal (6). The mounting hole (2-5) is provided with a temperature sensing electronic element (3).

3. An electrically fused fitting with no weld time setting according to claim 2, wherein, One end of the resistance wire (1) is connected with the electrode head (4), and the other end is connected with the lead wire on one side of the temperature sensing electronic element (3) on the first wiring terminal (5). The lead wire on the other side of the temperature sensing electronic element (3) is connected with the second wiring terminal (6).

4. A no-wait-time-set electrically fused pipe fitting according to claim 1 or 3, wherein, The resistance wire (1) is embedded in a spiral shape on the inner side wall of the pipe fitting body (2) according to the set pitch.

5. An electrically fused fitting with no weld time setting according to claim 2, wherein, One side of the mounting hole (2-5) is an open structure, which facilitates the installation of the temperature sensing electronic element (3). The mounting hole (2-5) is in communication with the two wiring holes (2-3) to facilitate the wiring of the lead wire.

6. An electrically fused fitting with no weld time setting according to claim 2, wherein, The outer side of the first wiring terminal (5) is provided with a protective cap (7), and the outer side of the second wiring terminal (6) is provided with a plastic electrode (8). The pipe fitting body (2) is provided with an electrode head protection structure (9) extending outward at the electrode head (4) to protect the electrode head (4). The opening side of the mounting hole (2-5) is provided with a plugging member (10).

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