Tightly-coated heat shrink tube

Abstract

The utility model relates to the technical field of heat shrink tubes, in particular to a tightly-coated heat shrink tube. Comprising a pipe body, pipe outside rotating strips are fixedly connected to the outer side of the pipe body, the pipe outside rotating strips are circumferentially distributed on the outer side of the pipe body, side pipes are fixedly connected to the two sides of the pipe body, and a contraction structure is arranged in the pipe body. When the pipe body is heated, the pipe body shrinks along with heating, at the moment, the pipe outside rotating strips and the pipe inside rotating strips are affected by pipe body shrinkage at the same time, adjacent pipe inside rotating strips shrink, adjacent shrinkage strips are driven to move at the same time, and the inclined ends of the shrinkage strips slide with one ends of the adjacent shrinkage strips; and the telescopic strip is driven to rotate and tighten, and the joint is tightened in all directions, so that the gap between the telescopic strip and the pipe body is smaller, the limiting is tighter, and the problems of gaps and non-tightness generated in the coating process of the pipe body are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat shrink tubes, in particular to a tightly wrapped heat shrink tube. Background Art

[0002] Heat shrink tubing is a kind of product with high-temperature shrinkage, soft flame retardancy, insulation and corrosion resistance. It is widely used in insulation protection of various wiring harnesses, solder joints, inductors, rust and corrosion prevention of metal tubes and rods, etc. During production, the heat shrink tubing is heated to a highly elastic state, a load is applied to make it expand, and it is quickly cooled while maintaining the expansion to make it enter a glassy state. This state is fixed. When heated during use, it will return to a highly elastic state, but at this time the load is gone and it will shrink.

[0003] Because heat shrink tubing has good high-temperature shrinkage properties, it has been widely used in the power industry. However, the existing heat shrink tubing on the market is prone to loose coverage when wrapping joints, wire harnesses, etc. due to the uneven surfaces of joints and wire harnesses, which reduces the insulation and protection effects of the heat shrink tubing. Utility Model Content

[0004] The purpose of the present application is to solve the problem that the existing heat shrink tube is not easily wrapped tightly when wrapping at uneven joints. The present application provides a heat shrink tube with tight wrapping.

[0005] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0006] A tightly wrapped heat shrink tube comprises a tube body, the outer side of the tube body is fixedly connected to an outer tube rotating strip, the outer tube rotating strip is circumferentially distributed on the outer side of the tube body, both sides of the tube body are fixedly connected to side tubes, and a shrinking structure is arranged inside the tube body.

[0007] By adopting the above technical solution, when the heat shrink tube is used to cover the joint, the joint to be connected is inserted into the tube body from one end of the tube body, and then the tube body is heated. During the heating process, the tube body shrinks. At this time, the outer rotating strips of the tube shrink along with the shrinkage of the tube body, and the adjacent outer rotating strips of the tube also shrink and fit tightly together, thereby enhancing the covering effect of the heat shrink tube on the connection point, making it tighter after covering and reducing the possibility of loosening.

[0008] Furthermore, the contraction structure comprises an inner tube rotating strip fixedly connected to the inner wall of the tube body, the inner tube rotating strip corresponds to the outer tube rotating strip, and the cross section of the inner tube rotating strip is tapered.

[0009] By adopting the above technical solution, the tube body shrinks as it is heated. At this time, the outer rotating strips and the inner rotating strips are simultaneously affected by the shrinkage of the tube body. The adjacent inner rotating strips shrink, leaving less space between them and the tube body and making the limitation tighter.

[0010] Furthermore, a contraction bar is fixedly connected to the rotating bar in the tube, the cross section of the contraction bar is a parallelogram, and two sides of the contraction bar are sloped, and the two slopes correspond to each other.

[0011] By adopting the above technical solution, adjacent rotating bars in the tube are contracted, and at the same time, adjacent contraction bars are driven to move, so that the inclined end thereof slides with one end of the adjacent contraction bar, driving the contraction bar to rotate and tighten.

[0012] Furthermore, both sides of the tube body are fixedly connected with side tubes, a plurality of tube openings are fixedly connected to the side tubes, and limiting blocks are fixedly connected inside the tube openings.

[0013] By adopting the above technical solution, the limit block restricts the connection during the heating process, thereby reducing the deviation during the plastic packaging process.

[0014] Furthermore, a contraction groove is provided between the two pipe openings, and the contraction groove is in a cone shape.

[0015] By adopting the above technical solution, as the shrinkage groove on the heating side tube also shrinks, the tube mouth is driven to shrink, and the two ends of the connecting line are fixed.

[0016] Furthermore, a mounting ring is fixedly connected to one side of the tube body, the mounting ring is in a funnel shape, and the mounting ring corresponds to the shrink strip.

[0017] By adopting the above technical solution, the mounting ring is inserted into the interior of the tube body, and then the other end thereof is pulled out from the other end of the tube body, so that the connection port remains between the shrink strips.

[0018] Furthermore, a flame retardant layer is fixedly connected to the inside of the tube body, and the rotating strip outside the tube is a flame retardant strip.

[0019] By adopting the above technical solution, the connection of the wires is protected by the flame retardant layer to avoid damage to the connection due to excessive temperature.

[0020] Furthermore, a hot melt adhesive layer is fixedly connected to the flame retardant layer, and the rotating strip in the tube is a hot melt adhesive strip.

[0021] By adopting the above technical solution, the rotating strip is melted by the heating, thereby filling the gap between the tube body and the connection, making the inside of the tube body tighter after heating.

[0022] In summary, the present application includes at least one of the following beneficial effects:

[0023] 1. In the present application, when the tube body is heated, the tube body shrinks as it is heated. At this time, the outer rotating strips and the inner rotating strips are simultaneously affected by the shrinkage of the tube body, and the adjacent inner rotating strips shrink, while driving the adjacent shrinking strips to move, allowing their inclined ends to slide with one end of the adjacent shrinking strip, driving the shrinking strip to rotate and tighten, and tightening the connection in all directions, so that the gap between it and the tube body is smaller, the limit is tighter, and the gap and looseness of the tube body generated during the coating process are reduced.

[0024] 2. In the present application, when the tube body is heated, the flame retardant layer protects the connection of the wires to prevent damage to the connection due to excessive temperature. At the same time, the rotating strip is melted by the heating, thereby filling the gap between the tube body and the connection, making the inside of the tube body tighter after heating, thereby improving the wrapping effect of the heat shrink tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of a tightly wrapped heat shrink tube in the present application;

[0026] Figure 2 is a side view of a tightly wrapped heat shrink tube in the present application;

[0027] Figure 3 It is a schematic diagram of the internal structure of a tightly wrapped heat shrink tube in the present application;

[0028] Figure 4 It is a partial cross-sectional view of a tightly wrapped heat shrink tube in the present application.

[0029] Description of reference numerals:

[0030] 1. Tube body; 2. External rotating strip; 3. Side tube; 4. Tube mouth; 5. Limit block; 6. Mounting ring; 7. Shrinkage groove; 8. Internal rotating strip; 9. Shrinkage strip; 10. Flame retardant layer; 11. Hot melt adhesive layer. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The embodiment of the present application discloses a tightly wrapped heat shrink tube.

[0033] Reference Figure 1 A tightly wrapped heat shrink tube comprises a tube body 1, an outer tube rotating strip 2 is fixedly connected to the outer side of the tube body 1, the outer tube rotating strip 2 is circumferentially distributed on the outer side of the tube body 1, side tubes 3 are fixedly connected to both sides of the tube body 1, and a shrinkage structure is arranged inside the tube body 1.

[0034] When the heat shrink tube is used to cover the joint, the joint to be connected is inserted into the tube body 1 from one end of the tube body 1, and then the tube body 1 is heated. During the heating process, the tube body 1 shrinks. At this time, the outer rotating strips 2 of the tube shrink along with the shrinkage of the tube body 1, and the adjacent outer rotating strips 2 of the tube also shrink and fit tightly together, thereby strengthening the covering effect of the heat shrink tube on the connection point, making it tighter after covering and reducing the possibility of loosening.

[0035] Reference Figure 1 and Figure 2 , Figure 3 The contraction structure includes an inner tube rotating bar 8 fixedly connected to the inner wall of the tube body 1, the inner tube rotating bar 8 corresponds to the outer tube rotating bar 2, and the cross section of the inner tube rotating bar 8 is conical. A contraction bar 9 is fixedly connected to the inner tube rotating bar 8, and the cross section of the contraction bar 9 is a parallelogram. The two sides of the contraction bar 9 are sloped, and the two slopes correspond to each other. Side tubes 3 are fixedly connected to both sides of the tube body 1, and a plurality of pipe openings 4 are fixedly connected to the side tubes 3. The inner part of the pipe openings 4 is fixedly connected to a limiting block 5. A contraction groove 7 is provided between the two pipe openings 4, and the contraction groove 7 is conical. A mounting ring 6 is fixedly connected to one side of the tube body 1, and the mounting ring 6 is funnel-shaped and corresponds to the contraction bar 9.

[0036] When the heat shrink tube is needed to cover the connection port, the connection port line is introduced from the side tube 3, inserted into the inside of the tube body 1 through the installation ring 6, and then the other end is pulled out from the other end of the tube body 1, so that the connection port remains between the shrink strips 9. At this time, the connection line is more convenient to enter the tube body 1, which reduces the problem of difficulty in installing the heat shrink tube due to the unevenness of the connection, and improves the convenience of installing the heat shrink tube. When the tube body 1 is heated, the tube body 1 shrinks as it is heated. At this time, the outer rotating strip 2 and the inner rotating strip 8 are simultaneously affected by the contraction of the tube body 1, and the adjacent inner rotating strips 8 are The shrinkage groove 7 on the heated side tube 3 also shrinks, driving the tube mouth 4 to shrink, fixing the two ends of the connecting line, improving the overall coating effect of the heat shrink tube, limiting the gap between the tube body 1 and the tube body 1, and reducing the gap and looseness of the tube body 1 during the coating process.

[0037] Reference Figure 4 The tube body 1 is fixedly connected with a flame retardant layer 10, and the rotating strip 2 outside the tube is a flame retardant strip. The flame retardant layer 10 is fixedly connected with a hot melt adhesive layer 11, and the rotating strip 8 inside the tube is a hot melt adhesive strip.

[0038] When the tube body 1 is heated, the flame retardant layer 10 protects the connection of the wires to prevent damage to the connection due to excessive temperature. At the same time, the rotating strip is melted by the heating, thereby filling the gap between the tube body 1 and the connection, making the inside of the tube body 1 tighter after heating, thereby improving the covering effect of the heat shrink tube.

[0039] Working principle: When the heat shrink tube is needed to cover the connection port, the connection port line is inserted from the side tube 3, inserted into the tube body 1 through the installation ring 6, and then the other end is pulled out from the other end of the tube body 1, so that the connection port remains between the shrink strips 9. At this time, the connection line is more convenient to enter the tube body 1, reducing the problem of the heat shrink tube being difficult to install due to the uneven connection, and improving the convenience of the heat shrink tube when installing;

[0040] When the tube body 1 is heated, the tube body 1 shrinks as it is heated. At this time, the outer tube rotating strip 2 and the inner tube rotating strip 8 are simultaneously affected by the shrinkage of the tube body 1. The adjacent inner tube rotating strips 8 shrink, and at the same time drive the adjacent shrinking strips 9 to move, so that the inclined end thereof slides with one end of the adjacent shrinking strip 9, driving the shrinking strip 9 to rotate and tighten, and tightening the connection in all directions, so that the gap between it and the tube body 1 is smaller, the limit is tighter, and the gap and looseness of the tube body 1 during the coating process are reduced. As the shrinkage groove 7 on the heated side tube 3 also shrinks, the tube mouth 4 is driven to shrink, and the two ends of the connecting line are fixed, thereby improving the overall coating effect of the heat shrink tube, limiting it during the heating process, and reducing the deviation during the plastic coating process;

[0041] When the tube body 1 is heated, the flame retardant layer 10 protects the connection of the wires to prevent damage to the connection due to excessive temperature. At the same time, the rotating strip is melted by the heating, thereby filling the gap between the tube body 1 and the connection, making the inside of the tube body 1 tighter after heating, thereby improving the covering effect of the heat shrink tube.

Claims

1. A tightly wrapped heat shrink tube, comprising a tube body (1), characterized in that: The outer side of the tube body (1) is fixedly connected to an outer tube rotating strip (2), the outer tube rotating strip (2) is circumferentially distributed on the outer side of the tube body (1), both sides of the tube body (1) are fixedly connected to side tubes (3), and a contraction structure is arranged inside the tube body (1).

2. The tightly wrapped heat shrink tube according to claim 1, characterized in that: The contraction structure comprises an inner tube rotating strip (8) fixedly connected to the inner wall of the tube body (1), the inner tube rotating strip (8) corresponding to the outer tube rotating strip (2), and the cross section of the inner tube rotating strip (8) is tapered.

3. The tightly wrapped heat shrink tube according to claim 2, characterized in that: A contraction strip (9) is fixedly connected to the rotating strip (8) in the tube, the cross section of the contraction strip (9) is a parallelogram, and two sides of the contraction strip (9) are sloped, with the two slopes corresponding to each other.

4. The tightly wrapped heat shrink tube according to claim 2, characterized in that: Side tubes (3) are fixedly connected to both sides of the tube body (1), a plurality of tube openings (4) are fixedly connected to the side tubes (3), and limiting blocks (5) are fixedly connected inside the tube openings (4).

5. The tightly wrapped heat shrink tube according to claim 4, characterized in that: A contraction groove (7) is provided between the two pipe openings (4), and the contraction groove (7) is in a cone shape.

6. The tightly wrapped heat shrink tube according to claim 3, characterized in that: A mounting ring (6) is fixedly connected to one side of the tube body (1); the mounting ring (6) is in a funnel shape, and the mounting ring (6) corresponds to the shrink strip (9).

7. The tightly wrapped heat shrink tube according to claim 2, characterized in that: A flame retardant layer (10) is fixedly connected to the interior of the tube body (1), and the outer rotating strip (2) of the tube is a flame retardant strip.

8. The tightly wrapped heat shrink tube according to claim 7, characterized in that: A hot melt adhesive layer (11) is fixedly connected to the flame retardant layer (10), and the rotating strip (8) in the tube is a hot melt adhesive strip.

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