Electric melting pipe fitting

Abstract

The utility model relates to the technical field of pipe fittings, in particular to an electric melting pipe fitting which comprises an electric melting pipe, electric heating wires are arranged at the positions, close to the two ends, in a filling area between the outer wall and the inner wall of the electric melting pipe, the ends, close to each other, of the two electric heating wires are connected through a connecting wire, the other ends of the electric heating wires are provided with terminal posts, and the outer wall of the electric melting pipe is sleeved with a sleeve. A through hole is formed in a position, corresponding to the wiring terminal post, of the sleeve; a sealing plug is arranged above the limiting ring; according to the electric melting pipe fitting, the sleeve with the protection groove is arranged to be bonded and combined with the electric melting pipe, the sleeve protects the electric melting pipe and reduces the influence of external erosion and abrasion, the two electric heating wires are matched in the electric melting pipe, and the electric melting pipe is connected with an external power source through the corresponding wiring terminal columns under the cooperation of the connecting wires, so that the electric melting pipe is heated in a matched mode after being powered on; and therefore, direct electric melting connection fit between the electric melting pipe and an external corresponding pipe fitting is achieved, the use of an electric melting gun for heating welding is reduced, operation is convenient and fast, and application to the position with a small space range is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of pipe fittings technology, specifically to an electrofusion pipe fitting. Background Technology

[0002] Electrofusion fittings are plastic pipe fittings that can be connected by melting the material through the temperature generated by an electric current. Currently, PE pipe systems are widely used in water supply, gas and chemical industries. Electrofusion connections are characterized by reliable connection, convenient construction and intuitive inspection of welding quality.

[0003] The utility model with announcement number CN219755697U discloses a straight-through electrofusion fitting, including a sleeve and two electrode seats disposed on the outer ring of the sleeve. Both ends of the inner wall of the sleeve are provided with electric heating wires. A terminal is fixedly disposed in the electrode seat and electrically connected to the electric heating wire. A limit step is provided in the sleeve between the two electric heating wires, and the electrode seat is disposed at the limit step.

[0004] The above technical solution, by setting a limiting step at the center of the electrofusion fitting and moving the electrode seat from the connection end to this point, allows the end of the fitting to directly abut against the end face of the limiting step. Therefore, the pipe wall of the electrofusion fitting at the electrode seat does not directly contact other fittings. The limiting step increases the wall thickness around the electrode seat and prevents this area from becoming a weak point due to the connection, greatly increasing the service life of the fitting. However, traditional fittings require heat fusion before connection, resulting in low fusion strength and inconvenient installation. For ordinary pipes connected by heat fusion, the rapid cooling after the heat fusion gun is removed can lead to solidification and difficulty in connection if not installed in time. Furthermore, in areas with limited installation space, it is not convenient to use a heat fusion gun for heat fusion connection. The fitting itself does not have a heating wire, making it inconvenient to quickly perform heat fusion connection. Utility Model Content

[0005] The purpose of this utility model is to provide an electrofusion fitting to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An electrofusion fitting includes an electrofusion tube. Heating wires are provided near both ends in a filling area between the outer and inner walls of the electrofusion tube. Two heating wires are connected near one end by a connecting wire. A terminal post is provided at the other end of each heating wire. A sleeve is fitted onto the outer wall of the electrofusion tube. A through hole is formed on the sleeve corresponding to the terminal post. A limiting ring is also provided on the outer wall of the sleeve corresponding to the through hole. A sealing plug is provided above the limiting ring.

[0008] Furthermore, the inner diameter of the sleeve is adapted to the outer diameter of the electrofusion tube, and the inner wall of the sleeve is bonded and fixed to the outer wall of the electrofusion tube.

[0009] In this invention, the sleeve protects the outer wall of the electrofusion tube, reducing wear and tear caused by external contact and shortening its service life.

[0010] Specifically, the sleeve is made of polytetrafluoroethylene, and several anti-slip grooves are provided on the outer wall of the sleeve near both ends, and several anti-slip protrusions are provided on the outer wall of the sleeve near the middle.

[0011] In this invention, the polytetrafluoroethylene material provides chemical corrosion resistance, high temperature resistance, and electrical insulation, further protecting the internal sleeve. Multiple anti-slip grooves are evenly distributed to increase the contact area, facilitating the corresponding snap-fit ​​and pulling movement of external tools. This provides a leverage point for connecting the pipes, and with the cooperation of multiple anti-slip protrusions, it provides a contact area in the middle of the outer wall of the sleeve, increasing friction and making it easy to hold the entire sleeve by hand.

[0012] It should be noted that the electrofusion tube is made of polyvinyl chloride, the heating wire is injected into the tube wall, the two ends of the connecting wire are respectively welded and fixed to one end of the heating wire, and the bottom of the terminal post is welded and fixed to the other end of the heating wire.

[0013] In this invention, the electrofusion tube is made of polyvinyl chloride, which increases its corrosion resistance and wear resistance. Two heating wires are connected and cooperate through a connecting wire. With the cooperation of the terminal posts, the external power supply wires are connected to the corresponding terminal posts in sequence. When the power is turned on, the heating wires are started, thereby realizing the heating cooperation at both ends of the electrofusion tube, which facilitates quick heat fusion connection with externally installed pipe fittings.

[0014] Furthermore, the terminal post extends through the outer wall of the electrofusion tube and into the perforation of the sleeve.

[0015] In this invention, the terminal post extends into the sleeve, and the through hole communicates with the external space, which facilitates power connection with an external power source.

[0016] Specifically, the limiting ring and the sleeve are integrally formed, and the inner diameter of the limiting ring is adapted to the inner diameter of the perforation.

[0017] In this invention, the limiting ring facilitates the protection of the perforation location, and the sealing plug seals the perforation, reducing the impact of the external environment on the inside of the perforation when not in use.

[0018] It is worth adding that the outer diameter of the sealing plug is adapted to the outer diameter of the limiting ring, the top of the sealing plug is provided with a protrusion, the bottom of the sealing plug is provided with a rubber sleeve post, the outer diameter of the rubber sleeve post is adapted to the inner diameter of the limiting ring, and the bottom of the rubber sleeve post is inserted into the top of the terminal post.

[0019] In this invention, the top of the sealing plug is fitted with a protrusion, which helps to provide a point of force and facilitates the removal or installation of the sealing plug. The rubber sleeve post is inserted into the corresponding terminal post, which increases the protection and stability of the terminal post, and at the same time helps the sealing plug to be tightly inserted into the perforation.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. This utility model combines a sleeve with a protective groove and an electrofusion tube in an adhesive assembly. The sleeve protects the electrofusion tube, reducing the impact of external corrosion and wear. The electrofusion tube contains two heating wires, which, with the help of connecting wires, are connected to an external power source through corresponding terminals. This allows for heating of the electrofusion tube by electricity, enabling direct electrofusion connection between the electrofusion tube and corresponding external fittings. This reduces the need for heating and welding with an electrofusion gun, making the operation convenient and suitable for locations with limited space.

[0022] 2. This utility model increases the contact area by setting multiple anti-slip protrusions, thereby achieving overall hand-held gripping. The limiting ring cooperates with the perforation position, and with the cooperation of the sealing plug with rubber sleeve, the terminal post in the perforation is protected, reducing the impact of external environment on the terminal post during transportation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram showing the sealing plug of this utility model in the open state;

[0025] Figure 3 This is a schematic diagram of the sealing plug structure of this utility model;

[0026] Figure 4 This is a schematic cross-sectional view of the combination structure of the electrofusion tube and heating wire of this utility model.

[0027] Figure 5 This is a schematic diagram of the sleeve structure of this utility model;

[0028] Figure 6 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0029] The meanings of the labels in the diagram are as follows:

[0030] 1. Electrofusion tube; 10. Heating wire; 11. Connecting wire; 12. Terminal block;

[0031] 2. Sleeve; 20. Anti-slip groove; 21. Anti-slip protrusion; 22. Perforation; 23. Limiting ring;

[0032] 3. Sealing plug; 30. Protrusion; 31. Rubber sleeve post. Detailed Implementation

[0033] 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.

[0034] Please see Figures 1-6 This embodiment provides a technical solution:

[0035] An electrofusion fitting includes an electrofusion tube 1. Heating wires 10 are provided near both ends in the filling area between the outer and inner walls of the electrofusion tube 1. Two heating wires 10 are connected near one end by a connecting wire 11. Each heating wire 10 has a terminal post 12 at its other end. The electrofusion tube 1 is made of polyvinyl chloride. The heating wires 10 are injection molded into the tube wall of the electrofusion tube 1. Both ends of the connecting wire 11 are welded and fixed to one end of each heating wire 10. The bottom of each terminal post 12 is welded and fixed to the other end of each heating wire 10.

[0036] In this invention, the electrofusion tube 1 is made of polyvinyl chloride to increase corrosion resistance and wear resistance. Two heating wires 10 are connected and cooperate through connecting wires 11. With the cooperation of terminal posts 12, the external power supply wires are connected to the corresponding terminal posts 12 in sequence. When power is turned on, the heating wires 10 are started, thereby realizing the heating cooperation at both ends of the electrofusion tube 1, which facilitates quick heat fusion connection with externally installed pipes.

[0037] Furthermore, the terminal post 12 extends out of the outer wall of the electrofusion tube 1 and into the perforation 22 of the sleeve 2.

[0038] In this utility model, the terminal post 12 extends into the sleeve 2, and the through hole 22 communicates with the external space, which helps to connect and cooperate with the external power source.

[0039] Specifically, a sleeve 2 is fitted on the outer wall of the electrofusion tube 1. The inner diameter of the sleeve 2 is adapted to the outer diameter of the electrofusion tube 1, and the inner wall of the sleeve 2 is bonded and fixed to the outer wall of the electrofusion tube 1.

[0040] In this invention, the sleeve 2 protects the outer wall of the electrofusion tube 1, reducing wear and tear on the electrofusion tube 1 caused by external contact and shortening its service life.

[0041] It should be noted that the sleeve 2 is made of polytetrafluoroethylene. Several anti-slip grooves 20 are provided on the outer wall of the sleeve 2 near both ends, and several anti-slip protrusions 21 are provided on the outer wall of the sleeve 2 near the middle.

[0042] In this invention, the polytetrafluoroethylene material provides chemical corrosion resistance, high temperature resistance, and electrical insulation, further protecting the inner sleeve 2. Multiple anti-slip grooves 20 are evenly distributed to increase the contact area, facilitating the corresponding snap-fit ​​and pulling movement of external tools. This provides a leverage point for connecting the pipes, and with the cooperation of multiple anti-slip protrusions 21, it provides a contact area in the middle of the outer wall of the sleeve 2, increasing friction and making it easy to hold the sleeve 2 as a whole.

[0043] Furthermore, a through hole 22 is provided on the sleeve 2 at the position corresponding to the terminal post 12, and a limiting ring 23 is also provided on the outer wall of the sleeve 2 at the position corresponding to the through hole 22. The limiting ring 23 and the sleeve 2 are integrally formed, and the inner diameter of the limiting ring 23 is adapted to the inner diameter of the through hole 22.

[0044] In this utility model, the limiting ring 23 facilitates the protection of the perforation 22 position, and the sealing plug 3 seals the perforation 22, reducing the impact of the external environment on the inside of the perforation 22 when not in use.

[0045] It is worth adding that a sealing plug 3 is provided above the limiting ring 23. The outer diameter of the sealing plug 3 is adapted to the outer diameter of the limiting ring 23. A protrusion 30 is provided on the top of the sealing plug 3, and a rubber sleeve 31 is provided at the bottom of the sealing plug 3. The outer diameter of the rubber sleeve 31 is adapted to the inner diameter of the limiting ring 23, and the bottom of the rubber sleeve 31 is inserted into the top of the terminal post 12.

[0046] In this utility model, the top of the sealing plug 3 is fitted with a protrusion 30, which helps to provide a point of force and facilitates the removal or installation of the sealing plug 3. The rubber sleeve post 31 is inserted into the corresponding terminal post 12, which increases the protection stability of the terminal post 12 and also helps the sealing plug 3 to be tightly inserted into the through hole 22.

[0047] In this embodiment, when using the electrofusion fitting, the heating wire 10 is first installed and matched with the electrofusion tube 1, and the two heating wires 10 are connected by the connecting wire 11. The corresponding terminal post 12 extends from the outer wall of the electrofusion tube 1. Then, the sleeve 2 with multiple anti-slip grooves 20 is bonded and matched with the electrofusion tube 1, and the terminal post 12 passes through the corresponding through hole 22. The sealing plug 3 with rubber sleeve post 31 is inserted and matched with the limiting ring 23. The rubber sleeve post 31 is inserted and matched with the terminal post 12 to increase the protective stability.

[0048] When the electrofusion tube 1 needs to be heat-fused to the external pipe fitting, the sealing plug 3 is removed through the protrusion 30, and the external power cord is inserted into the corresponding terminal post 12 in sequence to realize the energization of the two heating wires 10, thereby heating the electrofusion tube 1. The electrofusion tube 1 has high interface strength, no diameter reduction phenomenon, large flow rate, and is not limited by environmental space during installation. It has low labor intensity and is easy to operate.

Claims

1. An electrofusion fitting comprising an electrofusion pipe (1) characterised in that: The electric melting pipe (1) is provided with electric heating wires (10) in the filling area between the outer wall and the inner wall, close to the two ends, two electric heating wires (10) are connected by a connecting wire (11) at one end close to each other, the other end of the electric heating wire (10) is provided with a terminal post (12), the outer wall of the electric melting pipe (1) is provided with a sleeve (2), the sleeve (2) is provided with a through hole (22) corresponding to the terminal post (12), the outer wall of the sleeve (2) is provided with a limiting ring (23) corresponding to the through hole (22), and the limiting ring (23) is provided with a sealing plug (3) above.

2. The electric melt pipe according to claim 1, characterized in that: The inner diameter of the sleeve (2) is matched with the outer diameter of the electric melting pipe (1), and the inner wall of the sleeve (2) is adhesively fixed with the outer wall of the electric melting pipe (1).

3. The electric melt pipe according to claim 1, characterized in that: The sleeve (2) is made of polytetrafluoroethylene material, a plurality of anti-skid grooves (20) are formed in the outer wall of the sleeve (2) close to the two ends, and a plurality of anti-skid protrusions (21) are arranged on the outer wall of the sleeve (2) close to the middle.

4. The electric melt pipe according to claim 1, characterized in that: The electric melting pipe (1) is made of polyvinyl chloride, the electric heating wire (10) is injection molded in the pipe wall of the electric melting pipe (1), the connecting wire (11) is welded and fixed at one end of the electric heating wire (10), and the terminal post (12) is welded and fixed at the other end of the electric heating wire (10).

5. The electric melt pipe of claim 1, wherein: The terminal post (12) penetrates out of the outer wall of the electric melting pipe (1) and extends into the through hole (22) of the sleeve (2).

6. The electric melt pipe of claim 1, wherein: The limiting ring (23) and the sleeve (2) are an integral structure, and the inner diameter of the limiting ring (23) is matched with the inner diameter of the through hole (22).

7. The electric melt pipe of claim 1, wherein: The outer diameter of the sealing plug (3) is matched with the outer diameter of the limiting ring (23), the top of the sealing plug (3) is provided with a lug (30), the bottom of the sealing plug (3) is provided with a rubber sleeve column (31), the outer diameter of the rubber sleeve column (31) is matched with the inner diameter of the limiting ring (23), and the bottom of the rubber sleeve column (31) is inserted and matched with the top of the terminal post (12).

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