A kind of enhanced PE-RT electric fusion pipe fittings

Abstract

The utility model belongs to the technical field of pipe fittings, and is particularly an enhanced PE-RT electric fusion pipe fitting, comprising an outer pipe, wherein an inner pipe is arranged inside the outer pipe; openings are provided at the middle positions of the upper parts of both ends of the outer pipe, and connecting columns are arranged inside the openings; electric heating coils are fixedly connected to the inner walls of both ends of the outer pipe around the periphery; electric heating coils are fixedly connected to the outer walls of both ends of the inner pipe around the periphery, and a connecting line is fixedly connected to the middle position of the upper right side of the electric heating coils. The utility model can heat the outer wall of the pipe body by energizing the electric heating coils one to achieve a fusion welding connection between the outer wall of the pipe body and the inner wall of the outer pipe, and at the same time, the inner wall of the pipe body can be heated by energizing the electric heating coils two to achieve a fusion welding connection between the inner wall of the pipe body and the inner pipe, thereby achieving an inner and outer double-layer fusion welding connection of the pipe body, and the connection is stable and firm, and the sealing and leak-proof effect is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe fittings, and specifically relates to an enhanced PE-RT electric fusion pipe fitting. Background Art

[0002] PE-RT is a material formed by the copolymerization of ethylene and octene monomers through metallocene catalysis. This material has excellent high and low temperature resistance, corrosion resistance, and impact resistance, and has good use effect and long service life. Electric fusion pipe fittings refer to a kind of plastic pipe fittings that can be melted by the temperature generated by electric current to achieve connection. For example, the existing PE-RT electric fusion pipe fittings have the following working principle: the resistance wire embedded in the inner cavity of the electric fusion pipe fitting is electrically heated by an electric fusion welding machine, and the heating energy is used to make the connection interface between the pipe fitting and the pipe body diffuse with each other under the action of high temperature and working pressure. When the depth of mutual diffusion on the interface reaches the specification set by the chain entanglement, the interface after natural cooling has the necessary welding strength to produce a reliable welding connection for pipeline connection. It can be widely used in gas transmission, water supply, sewage discharge, agricultural irrigation, oil fields, mining, chemical industry, post and telecommunications, etc. Through the use of PE-RT electric fusion pipe fittings, the stable connection and sealing and leak-proof effect of plastic pipes can be better guaranteed.

[0003] When the existing plastic pipe body is welded by the PE-RT electric fusion pipe fitting, after the preparation work, the pipe body is first inserted into the pipe fitting, and then the connection column on the pipe fitting is energized to heat the heating wire in the pipe fitting. After the inner wall of the pipe fitting is further melted by the heating wire, it is welded and connected with the outer wall of the pipe body. The heating wire in the pipe fitting is a single-layer arrangement. When in use, only the heating and welding between the inner wall of the pipe fitting and the outer wall of the pipe body can be achieved. The single-layer welding connection is not strong, and the sealing and leak-proof effect is not good, which needs further improved design. For this reason, the utility model proposes an enhanced PE-RT electric fusion pipe fitting with an inner and outer double-layer electric heating ring welding structure. Utility Model Content

[0004] In order to solve the above-mentioned problems existing in the prior art, the utility model provides an enhanced PE-RT electric fusion pipe fitting, which can heat the outer wall of the pipe body by turning on the power of the electric heating ring to achieve a fusion welding connection between the outer wall of the pipe body and the inner wall of the outer pipe, and at the same time, the inner wall of the pipe body can be heated by turning on the power of the second electric heating ring to achieve a fusion welding connection between the inner wall of the pipe body and the inner pipe, thereby achieving a double-layer fusion welding connection between the inner and outer layers of the pipe body, with a stable and firm connection and good sealing and leak-proof effect.

[0005] To achieve the above object, the utility model provides the following technical solution: an enhanced PE-RT electric fusion pipe fitting, comprising an outer pipe, an inner pipe is arranged inside the outer pipe, and a limiting ring is integrally connected between the middle position of the outer wall of the inner pipe and the middle position of the inner wall of the outer pipe;

[0006] The outer tube has openings at the middle positions of the upper parts of both ends, the openings are provided with connecting columns inside, and the upper ends of the openings are fixedly connected with sheaths;

[0007] The inner walls of both ends of the outer tube are fixedly connected with electric heating coils 1, and the bottom end of the connecting column is fixedly connected to the middle position of the upper end of the electric heating coil 1;

[0008] Electric heating coil 2 is fixedly connected to the outer walls of both ends of the inner tube, and a connecting wire is fixedly connected to the middle position of the upper right side of the electric heating coil 2. One end of the connecting wire, which is different from the electric heating coil 2, passes through the limiting ring and is fixedly connected to the middle position of the upper right side of the electric heating coil 1.

[0009] As a preferred technical solution for an enhanced PE-RT electric fusion pipe fitting of the utility model, a plurality of screw holes are provided at both ends of the outer pipe, and pointed screws are screwed and connected inside the screw holes.

[0010] As a preferred technical solution for an enhanced PE-RT electric fusion pipe fitting of the utility model, a protective cap is sleeved and connected to the outer periphery of the upper end of the sheath, and an outer protrusion is integrally formed around the upper end of the protective cap.

[0011] As a preferred technical solution for an enhanced PE-RT electric fusion pipe fitting of the utility model, a flexible connecting strip is fixedly connected to the middle position of the left side of the protective cap, and the end of the flexible connecting strip different from the protective cap is fixedly connected to the middle position of the left bottom end of the sheath.

[0012] As a preferred technical solution for an enhanced PE-RT electric fusion pipe fitting of the utility model, the outer pipe is a PE-RT pipe fitting.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model has an inner tube inside the outer tube, and at the same time, an electric heating coil 1 is provided on the inner wall of the outer tube, and an electric heating coil 2 is further provided on the outer wall of the inner tube. When in use, after the tube body is inserted into the outer tube and sheathed with the inner tube, the external electric fusion welding machine electrical joint can be connected to the connecting column, and the outer wall of the tube body can be heated by energizing the electric heating coil 1 to achieve a fusion welding connection between the outer wall of the tube body and the inner wall of the outer tube, and at the same time, the inner wall of the tube body can be heated by energizing the electric heating coil 2 to achieve a fusion welding connection between the inner wall of the tube body and the inner tube, thereby achieving an inner and outer double-layer fusion welding connection of the tube body, and the connection is stable and firm, and the sealing and leak-proof effect is good.

[0015] 2. When the utility model is connected and used, a plurality of pointed screws on the outer tube can be used to further achieve a fixed connection with the tube body, so that the connection is more stable and firm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at point A;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at B;

[0021] Figure 5 This is a schematic diagram of the structure of the utility model connected to the pipe body;

[0022] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure.

[0023] In the figure: 1. outer tube; 2. limiting ring; 3. inner tube; 4. opening; 5. connecting column; 6. sheath; 7. protective cap; 8. outer protrusion; 9. flexible connecting strip; 10. electric heating coil one; 11. connecting wire; 12. electric heating coil two; 13. screw hole; 14. pointed screw; 15. tube body. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example

[0026] See also Figure 1-6The utility model provides the following technical solutions: an enhanced PE-RT electric fusion pipe fitting, comprising an outer pipe 1, the outer pipe 1 is a PE-RT pipe fitting, an inner pipe 3 is arranged inside the outer pipe 1, and a limiting ring 2 is integrally connected between the middle position of the outer wall of the inner pipe 3 and the middle position of the inner wall of the outer pipe 1, wherein the pipe fitting body is made of PE-RT material, and has excellent high and low temperature resistance, corrosion resistance, and impact resistance. When in use, two pipe bodies 15 can be respectively inserted from both ends of the outer pipe 1, and connected with the inner pipe 3, and the insertion end is limited and positioned by the limiting ring 2, so that the subsequent pipe body 15 can be further connected with the pipe fitting;

[0027] Furthermore, openings 4 are provided at the middle positions of the upper parts of both ends of the outer tube 1, and connecting columns 5 are arranged inside the openings 4. A sheath 6 is fixedly connected to the upper end of the opening 4, and a protective cap 7 is sleeved and connected to the outer periphery of the upper end of the protective cap 6. An outer protrusion 8 is integrally formed around the upper end of the protective cap 7. A flexible connecting strip 9 is fixedly connected to the middle position of the left side of the protective cap 7, and the end of the flexible connecting strip 9 different from the protective cap 7 is fixedly connected to the middle position of the left bottom end of the sheath 6, wherein the connecting column 5 is made of copper. When in use, the external electric fusion welding machine electrical connector can be connected to the connecting column 5 so as to energize the electric heating coil 10 and the electric heating coil 2 12 to heat them. The protective cap 7 and the sheath 6 are used for sealing and protecting the connecting column 5, and the protective cap 7 is wide at the top and narrow at the bottom. At the same time, the outer protrusion 8 is further arranged to facilitate the removal and pressing of the protective cap 7. The flexible connecting strip 9 is made of rubber material and is used for further connection between the protective cap 7 and the sheath 6 to prevent the protective cap 7 from falling off and being lost after being removed.

[0028] Furthermore, electric heating coils 10 are fixedly connected around the inner walls of both ends of the outer tube 1, and the bottom end of the connecting column 5 is fixedly connected to the middle position of the upper end of the electric heating coil 10, wherein the electric heating coil 10 is made of copper and can generate heat after being powered on. The copper material has the advantages of high temperature resistance, stable resistance, stable heat generation, aging resistance and oxidation resistance;

[0029] Furthermore, electric heating coils 12 are fixedly connected around the outer walls of both ends of the inner tube 3, and a connecting wire 11 is fixedly connected to the middle position of the upper right side of the electric heating coil 12, and one end of the connecting wire 11 that is different from the electric heating coil 12 passes through the limiting ring 2 and is fixedly connected to the middle position of the upper right side of the electric heating coil 10, wherein the electric heating coil 12 is made of copper and can generate heat after power is turned on, and the connecting wire 11 is made of copper and is used for the electrical connection between the electric heating coil 12 and the electric heating coil 10.

[0030] In the present embodiment, the utility model is provided with an inner tube 3 in the outer tube 1, and at the same time, an electric heating coil 10 is provided on the inner wall of the outer tube 1, and an electric heating coil 2 12 is further provided on the outer wall of the inner tube 3. When in use, after the tube body 15 is inserted into the outer tube 1 and fitted with the inner tube 3, the external electric fusion welding machine electrical joint can be connected to the connecting column 5, and the outer wall of the tube body 15 can be heated by energizing the electric heating coil 10 to achieve a fusion welding connection between the outer wall of the tube body 15 and the inner wall of the outer tube 1, and at the same time, the inner wall of the tube body 15 can be heated by energizing the electric heating coil 2 12 to achieve a fusion welding connection between the inner wall of the tube body 15 and the inner tube 3, thereby achieving an inner and outer double-layer fusion welding connection of the tube body 15, and the connection is stable and firm, and the sealing and leak-proof effect is good.

[0031] Reference Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, further, both ends of the outer tube 1 are provided with a plurality of screw holes 13, and the inside of the screw holes 13 is screwed and connected with pointed screws 14, wherein the pointed screws 14 are provided at three locations and are distributed equidistantly in a ring shape, which are not fully shown in the figure.

[0032] In this embodiment, when the utility model is connected for use, a plurality of pointed screws 14 on the outer tube 1 can further achieve a fixed connection with the tube body 15, so that the connection is more stable and firm.

[0033] The use process and working principle of the utility model are as follows: after the preparation work is done, the two tube bodies 15 are respectively inserted into the two ends of the inner part of the outer tube 1, and are sleeved and connected with the inner tube 3 in the outer tube 1. At the same time, the insertion ends of the two tube bodies 15 are limited and positioned by the limiting ring 2 connected between the inner tube 3 and the outer tube 1, and then the several pointed screws 14 on the outer tube 1 are further screwed into the tube body 15 by an electric screwing tool. It should be noted that the pointed end of the pointed screw 14 does not penetrate the tube wall of the tube body 15, and then the protective cap 7 is lifted up by the outer protrusion 8, and the protective cap 7 is removed from the sheath 6 to expose the connecting column 5 in the sheath 6, and the connection state of the protective cap 7 and the sheath 6 is maintained by the flexible connecting strip 9 to prevent the protective cap 7 from falling and being lost, and then the external electric fusion welding machine is installed. The electric connector is connected to the connecting column 5 in the sheath 6 by snapping, and the electric fusion welding machine is started after the relevant parameters of fusion welding are set. The connecting column 5 energizes the electric heating coil 10, and further energizes the electric heating coil 2 12 on the inner wall of the inner tube 3 by the connecting wire 11. The outer wall of the tube body 15 is heated by energizing the electric heating coil 10 on the inner wall of the outer tube 1, so as to achieve the fusion connection between the outer wall of the tube body 15 and the inner wall of the outer tube 1, and the inner wall of the tube body 15 is heated by energizing the electric heating coil 2 12 on the inner wall of the inner tube 3, so as to further achieve the fusion connection between the inner wall of the tube body 15 and the outer wall of the inner tube 3, and then, after the fusion welding is completed, the electric connector of the electric fusion welding machine on the connecting column 5 is pulled out, and the protective cap 7 is put on the outside of the sheath 6 to cover and protect the connecting column 5 inside the connecting column 5.

[0034] In addition, the contents not described in detail in this embodiment are all within the scope of prior art and common knowledge.

[0035] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An enhanced PE-RT electric fusion pipe fitting, characterized in that: It comprises an outer tube (1), an inner tube (3) is arranged inside the outer tube (1), and a limiting ring (2) is integrally connected between the middle position of the outer wall of the inner tube (3) and the middle position of the inner wall of the outer tube (1); The outer tube (1) is provided with openings (4) at the middle of the upper parts of both ends, a connecting column (5) is provided inside the opening (4), and a sheath (6) is fixedly connected to the upper end of the opening (4); The inner walls of both ends of the outer tube (1) are fixedly connected to electric heating coils (10) all around, and the bottom end of the connecting column (5) is fixedly connected to the middle position of the upper end of the electric heating coil (10); The outer walls of both ends of the inner tube (3) are fixedly connected to electric heating coil 2 (12) all around, and a connecting wire (11) is fixedly connected to the middle position of the upper right side of the electric heating coil 2 (12), and the end of the connecting wire (11) different from the electric heating coil 2 (12) passes through the limiting ring (2) and is fixedly connected to the middle position of the upper right side of the electric heating coil 1 (10).

2. The enhanced PE-RT electric fusion pipe fitting according to claim 1, characterized in that: A plurality of screw holes (13) are provided at both ends of the outer tube (1), and pointed screws (14) are screwed into the interior of the screw holes (13).

3. The enhanced PE-RT electric fusion pipe fitting according to claim 1, characterized in that: The upper end of the protective sleeve (6) is sleeved and connected with a protective cap (7) at its periphery, and the upper end of the protective cap (7) is integrally formed with an outer protrusion (8) at its periphery.

4. The enhanced PE-RT electric fusion pipe fitting according to claim 3, characterized in that: A flexible connecting strip (9) is fixedly connected to the middle position of the left side of the protective cap (7), and an end of the flexible connecting strip (9) different from the protective cap (7) is fixedly connected to the middle position of the left bottom end of the protective sleeve (6).

5. The enhanced PE-RT electric fusion pipe fitting according to claim 1, characterized in that: The outer pipe (1) is a PE-RT pipe fitting.

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