Protective tin-containing thermoplastic pipe

Abstract

The utility model discloses a protective tin-containing thermoplastic pipe which comprises a thermoplastic pipe body. The device further comprises an internal sealing structure and an external sealing structure. The internal sealing structure comprises a tin ring and a sealing rubber ring which are arranged in the thermoplastic pipe body; the external sealing structure comprises a first mold and a second mold which can be assembled outside the thermoplastic pipe body, sealing end covers are arranged between the two ends of the first mold and the two ends of the second mold, and the sealing end covers are located on the outer sides of the heating wires. According to the utility model, the outside of the thermoplastic pipe body is subjected to injection molding, so that the outside of the molded thermoplastic pipe body is provided with a closed protective layer, the phenomenon that the thermoplastic pipe body is easy to damage due to brittleness increase after thermal shrinkage is avoided, the sealing performance is further improved, and the connecting end of the heating wire is not easy to damage and break.

Description

Technical Field

[0001] This utility model relates to the field of wire harness technology, specifically to a protective tin-containing thermoplastic tube. Background Technology

[0002] A heating wire is an electric heating element that uses a resistive material as its heat source and is covered with an insulating material on the outside. Its working principle is based on Joule's law, which states that when current flows through a conductor, the conductor's resistance converts electrical energy into heat energy. According to their applications, they can be divided into underfloor heating wires, industrial heating wires, household appliance heating wires, power battery heating wires, etc., and are widely used in industrial fields, construction fields, household appliances, new energy electric vehicles, and other fields.

[0003] The connection of the heating wire end is a very important part of the use. In the existing technology, the connection of the heating wire end is achieved by covering the connecting terminal. The inner layer of the connecting terminal is made of copper, and the outer layer is a heat shrink tubing. The heat shrink tubing is heated to deform it and wrap the copper tube. However, the heat shrink tubing becomes harder after heat shrinking, and it is easily damaged during use. Once damaged, the inner copper tube is exposed to external air or moisture, which can easily corrode it, causing the heating wire end to break and affecting the use. There is room for technical improvement. Utility Model Content

[0004] This invention aims to solve the aforementioned technical problem of the heating wire end being prone to breakage due to copper tube corrosion, and provides a protective tin-containing thermoplastic tube.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a protective tin-containing thermoplastic tube, comprising a thermoplastic tube body, wherein the thermoplastic tube body is a hollow cylindrical shape and is located between two heating wires; and further comprising:

[0006] Internal sealing structure: includes a tin ring located inside the thermoplastic tube body near the middle end, and sealing rubber rings located inside the thermoplastic tube body near both ends;

[0007] An external sealing structure includes a mold 1 and a mold 2 that can be molded outside the thermoplastic tube body. Both ends of the mold 1 and the mold 2 are provided with sealing end caps, which are located outside the heating wire.

[0008] Furthermore, the thermoplastic tube body is provided with annular recesses at positions corresponding to the tin ring and the sealing ring.

[0009] Furthermore, both the upper and lower ends of the opposite sides of mold one and mold two are provided with connecting strips, and the opposite connecting strips are detachably connected.

[0010] Furthermore, the sealing end cap includes two symmetrical semi-annular sealing plates, each of which is provided with a limiting neck. A sealing strip is provided on the outer side of the limiting neck, and a second sealing strip is provided on the side of the limiting neck away from the sealing plate.

[0011] Furthermore, the diameter of the second sealing strip is larger than the inner diameter of the openings at both ends of mold one and mold two.

[0012] Furthermore, both sealing strip one and sealing strip two are made of composite silicone material.

[0013] The advantages of this utility model compared with the prior art are as follows:

[0014] The internal tin ring melts when heated, forming a protective wrap around the wire. The sealing ring is used to form a seal between the wire and the thermoplastic tube, blocking the tin ring and the copper wire of the wire, preventing external air from entering and preventing copper wire corrosion.

[0015] Injection molding is performed on the outside of the thermoplastic tube, which creates a closed protective layer on the outside of the thermoplastic tube after molding. This prevents the thermoplastic tube from being easily damaged due to increased brittleness after heat shrinkage, further improves the sealing performance, and makes the heating wire connection end less prone to damage and breakage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a perspective structural diagram of the present invention.

[0018] Figure 3 This is a schematic diagram of the structure of the heat shrink tubing of this utility model.

[0019] Figure 4 These are cross-sectional views of mold one and mold two of this utility model.

[0020] Figure 5 This is an exploded view of the sealing end cap of this utility model.

[0021] As shown in the figure: 1. Thermoplastic tube body, 2. Heating wire, 3. Tin ring, 4. Sealing ring, 5. Recess, 6. Mold one, 7. Mold two, 8. Connecting strip, 9. Sealing end cap, 10. Sealing plate, 11. Limiting neck, 12. Sealing strip one, 13. Sealing strip two. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] Example 1, in conjunction with Appendix Figure 1 , 23. A protective tin-containing thermoplastic tube, comprising a thermoplastic tube body 1, which is a hollow cylindrical shape and located between two heating wires 2, providing connection assistance and protection for the two heating wires 2; in specific operation, firstly, the thermoplastic tube body 1 is sleeved on the outside of one of the heating wires 2, then the two heating wires 2 are stripped, the exposed copper wires are forked and inserted and twisted together, then the pre-sleeved thermoplastic tube body 1 is moved to the twist point, and heated by heating equipment such as a hot air box, so that the thermoplastic tube body 1 is deformed by heat, wrapping the two heating wires 1 to form a connection;

[0024] Combined with appendix Figure 1 , 2 3. It also includes an internal sealing structure: including a tin ring 3 located inside the thermoplastic tube 1 near the middle end, and sealing rings 4 located inside the thermoplastic tube 1 near both ends; and an annular recess 5 located on the thermoplastic tube 1 at positions corresponding to the tin ring 3 and the sealing rings 4.

[0025] In the above structure, the tin ring 3 melts due to heat and flows on the outside of the copper wire of the conductor, automatically filling uneven areas. This not only improves the tightness of the connection but also protects the conductor connection. In addition, the sealing ring 4 has a good sealing effect due to the soft contact between it and the thermoplastic tube 1, protecting the copper wire connection of the conductor and preventing air from entering.

[0026] Combined with appendix Figure 4 , 5 It also includes an external sealing structure; including mold 6 and mold 7 that can be molded outside the thermoplastic tube 1. The upper and lower ends of opposite sides of mold 6 and mold 7 are provided with connecting strips 8. The opposite connecting strips 8 can be detachably connected. Mold 6 and mold 7 can be spliced ​​through the connecting strips 8 to form an injection space outside the thermoplastic tube 1.

[0027] Both ends of mold 1 (6) and mold 2 (7) are provided with sealing end caps (9). The sealing end caps (9) are located outside the heating line 2, forming a closed space to facilitate injection molding.

[0028] Specifically, the sealing end cap 9 includes two symmetrical semi-annular sealing plates 10, each of which is provided with a limiting neck 11. A sealing strip 12 is provided on the outer side of the limiting neck 11, and a sealing strip 2 13 is provided on the side of the limiting neck 11 away from the sealing plate 10. The diameter of the sealing strip 2 13 is larger than the inner diameter of the openings at both ends of the mold 1 6 and the mold 2 7. Both the sealing strip 12 and the sealing strip 2 13 are made of composite silicone.

[0029] In the above structure, the limiting neck 11 is inserted into the openings at both ends of mold 6 and mold 7, and the sealing is achieved by the compression contact between the sealing strip 12 and sealing strip 13 and the inner side of the opening, which facilitates injection molding. It is worth mentioning that one end of mold 6 is provided with an injection port. Through the mold closure and injection of mold 6 and mold 7, further protection can be achieved on the outside of the heat shrink tubing 1, so as to avoid damage to the heat shrink tubing 1, which becomes more brittle after heat shrinking, during use, causing air to enter the heat shrink tubing 1 and causing copper wire corrosion and other adverse conditions.

[0030] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A protective tin-containing thermoplastic tube, comprising a thermoplastic tube body (1), wherein the thermoplastic tube body (1) is a hollow cylindrical shape and is located between two heating wires (2); characterized in that: Also includes: Internal sealing structure: including a tin ring (3) inside the thermoplastic tube body (1) and near the middle end, and sealing rubber rings (4) inside the thermoplastic tube body (1) and near both ends; External sealing structure; including mold one (6) and mold two (7) that can be molded outside the thermoplastic tube body (1), and a sealing end cap (9) is provided between both ends of the mold one (6) and the mold two (7), and the sealing end cap (9) is located outside the heating line (2).

2. The protective tin-containing thermoplastic tube according to claim 1, characterized in that: The thermoplastic tube body (1) is provided with annular recesses (5) at positions corresponding to the tin ring (3) and the sealing ring (4).

3. The protective tin-containing thermoplastic tube according to claim 1, characterized in that: The mold one (6) and mold two (7) are provided with connecting strips (8) on their opposite sides at the top and bottom, and the opposite connecting strips (8) are detachably connected.

4. The protective tin-containing thermoplastic tube according to claim 1, characterized in that: The sealing end cap (9) includes two symmetrical semi-annular sealing plates (10), each of which is provided with a limiting neck (11). A sealing strip (12) is provided on the outer side of the limiting neck (11), and a sealing strip (13) is provided on the side of the limiting neck (11) away from the sealing plate (10).

5. A protective tin-containing thermoplastic tube according to claim 4, characterized in that: The diameter of the second sealing strip (13) is greater than the inner diameter of the openings at both ends of the first mold (6) and the second mold (7).

6. A protective tin-containing thermoplastic tube according to claim 5, characterized in that: Both sealing strip one (12) and sealing strip two (13) are made of composite silicone material.

Images