Dustproof sealing polyvinyl fluoride heat shrink tubing

Abstract

The utility model relates to the technical field of heat shrink tubes, specifically a dust-proof sealed polyfluoroethylene heat shrink tube, comprising a heat shrink tube body, a plurality of rings arranged at intervals and in an annular shape are fixedly connected to the inner wall of the heat shrink tube body, the inner wall of the ring abuts against the outer surface of a wire, a plurality of cavities are formed between the heat shrink tube body, the ring and the outer surface of the wire, a shrink ring is fixedly connected to the inner wall of the heat shrink tube body between two adjacent rings, and the thickness of the shrink ring gradually decreases toward the direction close to the ring, and when heated, the heat shrink tube body and the ring shrink and form a groove on the outer surface of the heat shrink tube body, and the groove is located between the two adjacent rings; the utility model arranges the cavity between the two adjacent rings, so that external dust needs to pass through the plurality of cavities to enter, thereby increasing the dust-proof ability of the heat shrink tube, and when the heat shrink tube body, the ring and the shrink ring shrink under heat, the shrink ring arranged on the inner wall of the heat shrink tube body is used to increase the pressure between the ring and the surface of the wire, thereby increasing the sealing effect of the cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of heat shrink tubes, in particular to a dustproof and sealed polyvinyl fluoride heat shrink tube. Background Art

[0002] Heat shrinkable materials, also known as polymer shape memory materials, have a memory effect after radiation cross-linking. The so-called "memory effect" is simply that cross-linked polymer materials expand under external force at high temperatures, can maintain the shape when expanded after cooling, and can return to the shape before expansion after further heating;

[0003] When heat shrink materials are applied in the fields of electronics and electricity, the applied products are heat shrink tubes, which are mainly used for the protection of wire connections to prevent foreign objects from entering the connection between two wires, and to prevent the outside world from directly contacting the connection between the two wires and causing electric shock. However, when in use, foreign dust can easily enter the heat shrink tube from the surface of the wire at the opening between the heat shrink tube and the outside world. At this time, the dust is squeezed by the heat shrink tube and the surface of the wire. When the heat shrink tube is subjected to thermal expansion and contraction, it will move back and forth relative to the wire, and then transfer the dust to the connection of the wire. The dust that enters the connection of the wire will move relative to the wire, which can easily cause an arc at the connection point, and then cause the heat shrink tube to be punctured and burned by the arc.

[0004] Therefore, it is necessary to propose a new technical solution to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a dustproof sealed polyvinyl fluoride heat shrink tube, which increases the pressure on the surface of the wire through the ring when the heat shrink tube body and the ring are heated, thereby increasing the sealing of the cavity in the heat shrink tube body.

[0006] The above technical purpose of the utility model is achieved through the following technical scheme: the dust-proof sealed polyvinyl fluoride heat shrinkable tube comprises a heat shrinkable tube body, the inner wall of the heat shrinkable tube body is fixedly connected with a plurality of annular rings arranged at intervals, the inner wall of the ring is in contact with the outer surface of the wire, a plurality of cavities are formed between the heat shrinkable tube body, the ring and the outer surface of the wire, a shrink ring is fixedly connected with the inner wall of the heat shrinkable tube body between two adjacent rings, and the thickness of the shrink ring gradually decreases towards the direction approaching the ring, when heated, the heat shrinkable tube body and the ring shrink and form a groove on the outer surface of the heat shrinkable tube body, and the groove is located between the two adjacent rings.

[0007] By adopting the above technical solution, the inner wall of the ring is brought into contact with the surface of the wire, and a plurality of cavities are formed between the wire and the heat shrink tube body, thereby reducing the contact area between the heat shrink tube body and the surface of the wire. At the same time, the heat shrinkage force of the heat shrink tube body and the ring is all applied to the surface of the wire, thereby increasing the pressure, increasing the pressure of the ring on the surface of the wire, and increasing the sealing of the inner cavity of the heat shrink tube body. At the same time, multiple cavities can accommodate dust, increasing the difficulty of dust entering the wire connection.

[0008] The utility model is further configured as follows: a plurality of inner arc walls of the sleeve rings are provided with annular ring grooves, and the inner walls of the openings of the ring grooves abut against the outer surface of the wire.

[0009] By adopting the above technical solution, when the heat shrink tube body and the ring are heated, the air in the ring groove is pressed out by utilizing the structure in which the ring groove abuts against the inner wall of the ring and the wire. At the same time, the air in the ring groove expands and overflows due to the heat. After the heating is stopped and the ring is cooled, the air in the ring groove cools and shrinks, that is, the ring groove generates suction to the outer surface of the wire, thereby increasing the connection strength between the heat shrink tube body and the wire.

[0010] The utility model is further configured as follows: a shrink ring is fixedly connected to the inner wall of the heat shrink tube body between two adjacent rings, the shrink ring is annular and has a triangular cross section, and one side of the shrink ring triangle is connected to the inner wall of the heat shrink tube body.

[0011] By adopting the above technical solution, when the heat shrink tube body is heated, the heat shrink tube body, the ring and the shrink ring shrink, and the inner wall of the ring first contacts the surface of the wire and prevents the ring from deforming. At this time, the heat shrink tube body at the contact position of the ring abuts against the ring and stops deforming, while the heat shrink tube body at the cavity position continues to shrink and deform into the cavity. By utilizing the structural setting of the thicker inner wall thickness of the heat shrink tube body at the cavity position, the performance of the heat shrink tube body having a larger shrinkage force at the thicker position is increased, and a larger force is applied to the ring, thereby further increasing the pressure applied by the ring on the surface of the wire, increasing the sealing effect of the cavity, and increasing the dustproof ability.

[0012] The utility model is further configured as follows: the ring wall thickness of the sleeve ring is twice the thickness of the heat shrink tube body plus the shrink ring.

[0013] By adopting the above technical solution and utilizing the ring wall thickness design of the ferrule, the shrink ring can shrink after the ferrule abuts against the surface of the wire, thereby increasing the connection strength between the heat shrink tube body and the wire.

[0014] The utility model is further configured as follows: six of the sleeve rings form a cycle, wherein four sleeve rings with annular grooves are arranged continuously, and inner walls of two sleeve rings located outside the four sleeve rings are not provided with annular grooves.

[0015] By adopting the above technical solution, the outer ring is not provided with a ring groove, which can increase the sealing degree of the heat shrink tube body and prevent the ring near the port from being deformed by impact. The ring without a ring groove has a larger contact area with the surface of the heat shrink tube body, which can also prevent external dust from entering the heat shrink tube body when the ring is deformed.

[0016] The utility model is further configured as follows: the distance between two sleeve rings located in the middle of a cycle is twice the sleeve ring spacing distance, and two shrink rings are fixedly connected therein.

[0017] By adopting the above technical solution, when the wire is small and the connection is short, the connection of the wire can be covered by the structure with a large spacing between the two middle rings, thereby increasing the covering effect and preventing dust from entering.

[0018] In summary, the utility model has the following beneficial effects:

[0019] By utilizing the setting of the cavity between two adjacent rings, when the ring clamps the wire, external dust needs to pass through several cavities to enter, thereby increasing the dust-proof ability of the heat shrink tube. When the heat shrink tube body, the ring and the shrink ring shrink due to heat, the ring first abuts against the surface of the wire and stops shrinking, while the side wall of the heat shrink tube body located in the cavity position continues to shrink and compress the space of the cavity. By utilizing the shrink ring arranged on the inner wall of the heat shrink tube body, the shrinking force of the heat shrink tube body and the shrink ring located in the cavity position is increased, and this force is applied to the surface of the wire through the ring, thereby increasing the abutment force between the ring and the wire and increasing the sealing effect of the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0022] Figure 3 It is a cross-sectional schematic diagram of the utility model when it is contracted.

[0023] In the figure:

[0024] 11. Heat shrink tube body; 12. Sleeve ring; 13. Shrink ring; 14. Ring groove. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] Example:

[0027] The dustproof sealing polyvinyl fluoride heat shrink tubing, such as Figure 1 to Figure 2As shown, it includes a heat shrinkable tube body 11, and the inner wall of the heat shrinkable tube body 11 is fixedly connected with a plurality of rings 12 arranged at intervals and in an annular shape, the inner wall of the ring 12 abuts against the outer surface of the wire, and a plurality of cavities are formed between the heat shrinkable tube body 11, the ring 12 and the outer surface of the wire, and a shrink ring 13 is fixedly connected to the inner wall of the heat shrinkable tube body 11 between two adjacent rings 12, and the thickness of the shrink ring 13 gradually decreases toward the direction close to the ring 12. When heated, the heat shrinkable tube body 11 and the ring 12 shrink and form a groove on the outer surface of the heat shrinkable tube body 11, and the groove is located between two adjacent rings 12. An annular annular groove 14 is opened on the inner arc wall of the plurality of rings 12, and the inner wall of the annular groove 14 abuts against the outer surface of the wire, and the inner wall position of the heat shrinkable tube body 11 between the two adjacent rings 12 is fixedly connected with the shrink ring 13, the shrink ring 13 is annular, and its cross section is triangular, and one side of the annular triangle of the shrink ring 13 is connected to the inner wall of the heat shrinkable tube body 11.

[0028] like Figure 2 and Figure 3 As shown, the wall thickness of the ring 12 is twice the thickness of the heat shrink tube body 11 plus the shrink ring 13, and six rings 12 form a cycle, in which four rings 12 with annular grooves 14 are arranged continuously, and the inner walls of the two rings 12 located outside the four rings 12 do not have annular grooves 14, and the distance between the two rings 12 located in the middle of a cycle is twice the spacing distance of the rings 12, and two shrink rings 13 are fixedly connected therein.

[0029] First, the heat shrinkable tube body 11 is sleeved on the outer ring of the connection between the two wires, and the ring 12 and the shrink ring 13 are located on the outer ring of the wire. Then, heat is transferred to the heat shrinkable tube body 11, the ring 12 and the shrink ring 13 to shrink the heat shrinkable tube body 11, the ring 12 and the shrink ring 13 made of polytetrafluoroethylene. The wall thickness of the ring 12 is greater than the sum of the thicknesses of the heat shrinkable tube body 11 and the shrink ring 13. Therefore, the inner wall of the ring 12 first abuts against the outer surface of the wire, and the arc structure of the inner wall of the ring 12 is used to make the ring 12 elastically deform when squeezing the surface of the wire. , ensure that the ring 12 adapts to the uneven surface of the wire, prevents external dust from passing through the gap between the wire surface and the ring 12 and entering the connection of the wire, thereby increasing the use effect. At the same time, a plurality of arranged rings 12 can form a plurality of cavities on the surface of the heat shrink tube body 11, the ring 12 and the wire, and the cavity is located between the wire connection and the opening of the heat shrink tube body 11, thereby preventing dust from getting stuck between the heat shrink tube body 11 and the wire and then getting stuck in the connection of the heat shrink tube body 11 wire due to the principle of thermal expansion and contraction of the heat shrink tube body 11. The dust stuck between the heat shrink tube body 11 and the wire is prevented from continuing to slide inward, and the dust stuck therein is prevented from continuously rubbing against the heat shrink tube body 11 and the wire surface, thereby causing the heat shrink tube body 11 to seal the wire surface to deteriorate. The sleeve 12 stops deforming when it abuts against the wire surface, and at the same time, the sleeve 12 prevents the heat shrink tube body 11 and the connecting portion of the sleeve 12 from deforming, while the inner wall of the heat shrink tube body 11 and the shrink ring 13 located in the cavity continue to shrink, because the ring wall thickness of the sleeve 12 is greater than that of the heat shrink tube body 11 and the shrink ring 13. The shrink ring 13 has a thickness. When the shrink ring 13 shrinks, the shrinking force is applied to the ring 12. The ring 12 then applies pressure to the outer surface of the wire, thereby causing the arc wall of the inner wall of the ring 12 to undergo elastic deformation. The ring 12 is then used to block the uneven structure on the surface of the wire, thereby further increasing its sealing effect. When the shrink ring 13 shrinks, a groove is formed on the outer surface of the heat shrink tube body 11. When it is necessary to further strengthen the connection strength between the heat shrink tube and the wire, a steel wire or rope can be wrapped around the groove for reinforcement, thereby further increasing the connection effect.

[0030] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A dustproof and sealed polyvinyl fluoride heat shrinkable tube, comprising a heat shrinkable tube body (11), characterized in that: The inner wall of the heat shrinkable tube body (11) is fixedly connected with a plurality of annular rings (12) arranged at intervals, the inner wall of the rings (12) abuts against the outer surface of the wire, and a plurality of cavities are formed between the heat shrinkable tube body (11), the rings (12) and the outer surface of the wire. A shrink ring (13) is fixedly connected to the inner wall of the heat shrinkable tube body (11) between two adjacent rings (12), and the thickness of the shrink ring (13) gradually decreases in a direction approaching the ring (12). When heated, the heat shrinkable tube body (11) and the rings (12) shrink and form a groove on the outer surface of the heat shrinkable tube body (11), and the groove is located between two adjacent rings (12).

2. The dustproof sealing polyvinyl fluoride heat shrinkable tube according to claim 1, characterized in that: An annular groove (14) is formed on the inner arc wall of a plurality of the collars (12), and the inner wall of the opening of the annular groove (14) abuts against the outer surface of the conductor.

3. The dustproof sealing polyvinyl fluoride heat shrinkable tube according to claim 2, characterized in that: A shrink ring (13) is fixedly connected to the inner wall of the heat shrink tube body (11) between two adjacent rings (12); the shrink ring (13) is annular and has a triangular cross section; one side of the shrink ring (13) is connected to the inner wall of the heat shrink tube body (11).

4. The dustproof sealing polyvinyl fluoride heat shrinkable tube according to claim 3, characterized in that: The wall thickness of the sleeve ring (12) is twice the thickness of the heat shrink tube body (11) plus the shrink ring (13).

5. The dustproof sealing polyvinyl fluoride heat shrinkable tube according to claim 2, characterized in that: The six collars (12) form a cycle, wherein four collars (12) provided with annular grooves (14) are arranged continuously, and the inner walls of the two collars (12) located outside the four collars (12) are not provided with annular grooves (14).

6. The dustproof sealing polyvinyl fluoride heat shrinkable tube according to claim 5, characterized in that: The distance between two sleeve rings (12) located in the middle of a cycle is twice the spacing distance between the sleeve rings (12), and two shrink rings (13) are fixedly connected therein.

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